Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2008 Cavium Networks |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 7 | * |
| 8 | * Some parts of the code were originally released under BSD license: |
| 9 | * |
| 10 | * Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights |
| 11 | * reserved. |
| 12 | * |
| 13 | * Redistribution and use in source and binary forms, with or without |
| 14 | * modification, are permitted provided that the following conditions are |
| 15 | * met: |
| 16 | * |
| 17 | * * Redistributions of source code must retain the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer. |
| 19 | * |
| 20 | * * Redistributions in binary form must reproduce the above |
| 21 | * copyright notice, this list of conditions and the following |
| 22 | * disclaimer in the documentation and/or other materials provided |
| 23 | * with the distribution. |
| 24 | * |
| 25 | * * Neither the name of Cavium Networks nor the names of |
| 26 | * its contributors may be used to endorse or promote products |
| 27 | * derived from this software without specific prior written |
| 28 | * permission. |
| 29 | * |
| 30 | * This Software, including technical data, may be subject to U.S. export |
| 31 | * control laws, including the U.S. Export Administration Act and its associated |
| 32 | * regulations, and may be subject to export or import regulations in other |
| 33 | * countries. |
| 34 | * |
| 35 | * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" |
| 36 | * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR |
| 37 | * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO |
| 38 | * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION |
| 39 | * OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM |
| 40 | * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, |
| 41 | * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF |
| 42 | * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR |
| 43 | * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR |
| 44 | * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 45 | */ |
| 46 | #include <linux/kernel.h> |
| 47 | #include <linux/module.h> |
| 48 | #include <linux/init.h> |
| 49 | #include <linux/pci.h> |
Aaro Koskinen | 20f6b82 | 2014-05-11 14:15:20 +0300 | [diff] [blame] | 50 | #include <linux/prefetch.h> |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 51 | #include <linux/interrupt.h> |
| 52 | #include <linux/platform_device.h> |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 53 | #include <linux/usb.h> |
| 54 | |
Aaro Koskinen | 2a81d2b | 2013-06-13 01:00:35 +0300 | [diff] [blame] | 55 | #include <linux/time.h> |
| 56 | #include <linux/delay.h> |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 57 | |
| 58 | #include <asm/octeon/cvmx.h> |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 59 | #include <asm/octeon/cvmx-iob-defs.h> |
| 60 | |
| 61 | #include <linux/usb/hcd.h> |
| 62 | |
Devendra Naga | 55fa328 | 2013-06-04 02:46:20 +0530 | [diff] [blame] | 63 | #include <linux/err.h> |
| 64 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 65 | #include <asm/octeon/octeon.h> |
| 66 | #include <asm/octeon/cvmx-helper.h> |
| 67 | #include <asm/octeon/cvmx-sysinfo.h> |
| 68 | #include <asm/octeon/cvmx-helper-board.h> |
| 69 | |
Aaro Koskinen | f121910 | 2013-10-10 23:25:30 +0300 | [diff] [blame] | 70 | #include "octeon-hcd.h" |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 71 | |
| 72 | /** |
| 73 | * enum cvmx_usb_speed - the possible USB device speeds |
| 74 | * |
| 75 | * @CVMX_USB_SPEED_HIGH: Device is operation at 480Mbps |
| 76 | * @CVMX_USB_SPEED_FULL: Device is operation at 12Mbps |
| 77 | * @CVMX_USB_SPEED_LOW: Device is operation at 1.5Mbps |
| 78 | */ |
| 79 | enum cvmx_usb_speed { |
| 80 | CVMX_USB_SPEED_HIGH = 0, |
| 81 | CVMX_USB_SPEED_FULL = 1, |
| 82 | CVMX_USB_SPEED_LOW = 2, |
| 83 | }; |
| 84 | |
| 85 | /** |
| 86 | * enum cvmx_usb_transfer - the possible USB transfer types |
| 87 | * |
| 88 | * @CVMX_USB_TRANSFER_CONTROL: USB transfer type control for hub and status |
| 89 | * transfers |
| 90 | * @CVMX_USB_TRANSFER_ISOCHRONOUS: USB transfer type isochronous for low |
| 91 | * priority periodic transfers |
| 92 | * @CVMX_USB_TRANSFER_BULK: USB transfer type bulk for large low priority |
| 93 | * transfers |
| 94 | * @CVMX_USB_TRANSFER_INTERRUPT: USB transfer type interrupt for high priority |
| 95 | * periodic transfers |
| 96 | */ |
| 97 | enum cvmx_usb_transfer { |
| 98 | CVMX_USB_TRANSFER_CONTROL = 0, |
| 99 | CVMX_USB_TRANSFER_ISOCHRONOUS = 1, |
| 100 | CVMX_USB_TRANSFER_BULK = 2, |
| 101 | CVMX_USB_TRANSFER_INTERRUPT = 3, |
| 102 | }; |
| 103 | |
| 104 | /** |
| 105 | * enum cvmx_usb_direction - the transfer directions |
| 106 | * |
| 107 | * @CVMX_USB_DIRECTION_OUT: Data is transferring from Octeon to the device/host |
| 108 | * @CVMX_USB_DIRECTION_IN: Data is transferring from the device/host to Octeon |
| 109 | */ |
| 110 | enum cvmx_usb_direction { |
| 111 | CVMX_USB_DIRECTION_OUT, |
| 112 | CVMX_USB_DIRECTION_IN, |
| 113 | }; |
| 114 | |
| 115 | /** |
| 116 | * enum cvmx_usb_complete - possible callback function status codes |
| 117 | * |
| 118 | * @CVMX_USB_COMPLETE_SUCCESS: The transaction / operation finished without |
| 119 | * any errors |
| 120 | * @CVMX_USB_COMPLETE_SHORT: FIXME: This is currently not implemented |
| 121 | * @CVMX_USB_COMPLETE_CANCEL: The transaction was canceled while in flight |
| 122 | * by a user call to cvmx_usb_cancel |
| 123 | * @CVMX_USB_COMPLETE_ERROR: The transaction aborted with an unexpected |
| 124 | * error status |
| 125 | * @CVMX_USB_COMPLETE_STALL: The transaction received a USB STALL response |
| 126 | * from the device |
| 127 | * @CVMX_USB_COMPLETE_XACTERR: The transaction failed with an error from the |
| 128 | * device even after a number of retries |
| 129 | * @CVMX_USB_COMPLETE_DATATGLERR: The transaction failed with a data toggle |
| 130 | * error even after a number of retries |
| 131 | * @CVMX_USB_COMPLETE_BABBLEERR: The transaction failed with a babble error |
| 132 | * @CVMX_USB_COMPLETE_FRAMEERR: The transaction failed with a frame error |
| 133 | * even after a number of retries |
| 134 | */ |
| 135 | enum cvmx_usb_complete { |
| 136 | CVMX_USB_COMPLETE_SUCCESS, |
| 137 | CVMX_USB_COMPLETE_SHORT, |
| 138 | CVMX_USB_COMPLETE_CANCEL, |
| 139 | CVMX_USB_COMPLETE_ERROR, |
| 140 | CVMX_USB_COMPLETE_STALL, |
| 141 | CVMX_USB_COMPLETE_XACTERR, |
| 142 | CVMX_USB_COMPLETE_DATATGLERR, |
| 143 | CVMX_USB_COMPLETE_BABBLEERR, |
| 144 | CVMX_USB_COMPLETE_FRAMEERR, |
| 145 | }; |
| 146 | |
| 147 | /** |
| 148 | * struct cvmx_usb_port_status - the USB port status information |
| 149 | * |
| 150 | * @port_enabled: 1 = Usb port is enabled, 0 = disabled |
| 151 | * @port_over_current: 1 = Over current detected, 0 = Over current not |
| 152 | * detected. Octeon doesn't support over current detection. |
| 153 | * @port_powered: 1 = Port power is being supplied to the device, 0 = |
| 154 | * power is off. Octeon doesn't support turning port power |
| 155 | * off. |
| 156 | * @port_speed: Current port speed. |
| 157 | * @connected: 1 = A device is connected to the port, 0 = No device is |
| 158 | * connected. |
| 159 | * @connect_change: 1 = Device connected state changed since the last set |
| 160 | * status call. |
| 161 | */ |
| 162 | struct cvmx_usb_port_status { |
| 163 | uint32_t reserved : 25; |
| 164 | uint32_t port_enabled : 1; |
| 165 | uint32_t port_over_current : 1; |
| 166 | uint32_t port_powered : 1; |
| 167 | enum cvmx_usb_speed port_speed : 2; |
| 168 | uint32_t connected : 1; |
| 169 | uint32_t connect_change : 1; |
| 170 | }; |
| 171 | |
| 172 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 173 | * struct cvmx_usb_iso_packet - descriptor for Isochronous packets |
| 174 | * |
| 175 | * @offset: This is the offset in bytes into the main buffer where this data |
| 176 | * is stored. |
| 177 | * @length: This is the length in bytes of the data. |
| 178 | * @status: This is the status of this individual packet transfer. |
| 179 | */ |
| 180 | struct cvmx_usb_iso_packet { |
| 181 | int offset; |
| 182 | int length; |
| 183 | enum cvmx_usb_complete status; |
| 184 | }; |
| 185 | |
| 186 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 187 | * enum cvmx_usb_initialize_flags - flags used by the initialization function |
| 188 | * |
| 189 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI: The USB port uses a 12MHz crystal |
| 190 | * as clock source at USB_XO and |
| 191 | * USB_XI. |
| 192 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND: The USB port uses 12/24/48MHz 2.5V |
| 193 | * board clock source at USB_XO. |
| 194 | * USB_XI should be tied to GND. |
| 195 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK: Mask for clock speed field |
| 196 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: Speed of reference clock or |
| 197 | * crystal |
| 198 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: Speed of reference clock |
| 199 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: Speed of reference clock |
| 200 | * @CVMX_USB_INITIALIZE_FLAGS_NO_DMA: Disable DMA and used polled IO for |
| 201 | * data transfer use for the USB |
| 202 | */ |
| 203 | enum cvmx_usb_initialize_flags { |
| 204 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI = 1 << 0, |
| 205 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND = 1 << 1, |
| 206 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK = 3 << 3, |
| 207 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ = 1 << 3, |
| 208 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ = 2 << 3, |
| 209 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ = 3 << 3, |
| 210 | /* Bits 3-4 used to encode the clock frequency */ |
| 211 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA = 1 << 5, |
| 212 | }; |
| 213 | |
| 214 | /** |
| 215 | * enum cvmx_usb_pipe_flags - internal flags for a pipe. |
| 216 | * |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 217 | * @CVMX_USB_PIPE_FLAGS_SCHEDULED: Used internally to determine if a pipe is |
| 218 | * actively using hardware. |
| 219 | * @CVMX_USB_PIPE_FLAGS_NEED_PING: Used internally to determine if a high speed |
| 220 | * pipe is in the ping state. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 221 | */ |
| 222 | enum cvmx_usb_pipe_flags { |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 223 | CVMX_USB_PIPE_FLAGS_SCHEDULED = 1 << 17, |
| 224 | CVMX_USB_PIPE_FLAGS_NEED_PING = 1 << 18, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 225 | }; |
| 226 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 227 | /* Maximum number of times to retry failed transactions */ |
| 228 | #define MAX_RETRIES 3 |
| 229 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 230 | /* Maximum number of hardware channels supported by the USB block */ |
| 231 | #define MAX_CHANNELS 8 |
| 232 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 233 | /* |
| 234 | * The low level hardware can transfer a maximum of this number of bytes in each |
| 235 | * transfer. The field is 19 bits wide |
| 236 | */ |
| 237 | #define MAX_TRANSFER_BYTES ((1<<19)-1) |
| 238 | |
| 239 | /* |
| 240 | * The low level hardware can transfer a maximum of this number of packets in |
| 241 | * each transfer. The field is 10 bits wide |
| 242 | */ |
| 243 | #define MAX_TRANSFER_PACKETS ((1<<10)-1) |
| 244 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 245 | /** |
| 246 | * Logical transactions may take numerous low level |
| 247 | * transactions, especially when splits are concerned. This |
| 248 | * enum represents all of the possible stages a transaction can |
| 249 | * be in. Note that split completes are always even. This is so |
| 250 | * the NAK handler can backup to the previous low level |
| 251 | * transaction with a simple clearing of bit 0. |
| 252 | */ |
| 253 | enum cvmx_usb_stage { |
| 254 | CVMX_USB_STAGE_NON_CONTROL, |
| 255 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE, |
| 256 | CVMX_USB_STAGE_SETUP, |
| 257 | CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE, |
| 258 | CVMX_USB_STAGE_DATA, |
| 259 | CVMX_USB_STAGE_DATA_SPLIT_COMPLETE, |
| 260 | CVMX_USB_STAGE_STATUS, |
| 261 | CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE, |
| 262 | }; |
| 263 | |
| 264 | /** |
| 265 | * struct cvmx_usb_transaction - describes each pending USB transaction |
| 266 | * regardless of type. These are linked together |
| 267 | * to form a list of pending requests for a pipe. |
| 268 | * |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 269 | * @node: List node for transactions in the pipe. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 270 | * @type: Type of transaction, duplicated of the pipe. |
| 271 | * @flags: State flags for this transaction. |
| 272 | * @buffer: User's physical buffer address to read/write. |
| 273 | * @buffer_length: Size of the user's buffer in bytes. |
| 274 | * @control_header: For control transactions, physical address of the 8 |
| 275 | * byte standard header. |
| 276 | * @iso_start_frame: For ISO transactions, the starting frame number. |
| 277 | * @iso_number_packets: For ISO transactions, the number of packets in the |
| 278 | * request. |
| 279 | * @iso_packets: For ISO transactions, the sub packets in the request. |
| 280 | * @actual_bytes: Actual bytes transfer for this transaction. |
| 281 | * @stage: For control transactions, the current stage. |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 282 | * @urb: URB. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 283 | */ |
| 284 | struct cvmx_usb_transaction { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 285 | struct list_head node; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 286 | enum cvmx_usb_transfer type; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 287 | uint64_t buffer; |
| 288 | int buffer_length; |
| 289 | uint64_t control_header; |
| 290 | int iso_start_frame; |
| 291 | int iso_number_packets; |
| 292 | struct cvmx_usb_iso_packet *iso_packets; |
| 293 | int xfersize; |
| 294 | int pktcnt; |
| 295 | int retries; |
| 296 | int actual_bytes; |
| 297 | enum cvmx_usb_stage stage; |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 298 | struct urb *urb; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 299 | }; |
| 300 | |
| 301 | /** |
| 302 | * struct cvmx_usb_pipe - a pipe represents a virtual connection between Octeon |
| 303 | * and some USB device. It contains a list of pending |
| 304 | * request to the device. |
| 305 | * |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 306 | * @node: List node for pipe list |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 307 | * @next: Pipe after this one in the list |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 308 | * @transactions: List of pending transactions |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 309 | * @interval: For periodic pipes, the interval between packets in |
| 310 | * frames |
| 311 | * @next_tx_frame: The next frame this pipe is allowed to transmit on |
| 312 | * @flags: State flags for this pipe |
| 313 | * @device_speed: Speed of device connected to this pipe |
| 314 | * @transfer_type: Type of transaction supported by this pipe |
| 315 | * @transfer_dir: IN or OUT. Ignored for Control |
| 316 | * @multi_count: Max packet in a row for the device |
| 317 | * @max_packet: The device's maximum packet size in bytes |
| 318 | * @device_addr: USB device address at other end of pipe |
| 319 | * @endpoint_num: USB endpoint number at other end of pipe |
| 320 | * @hub_device_addr: Hub address this device is connected to |
| 321 | * @hub_port: Hub port this device is connected to |
| 322 | * @pid_toggle: This toggles between 0/1 on every packet send to track |
| 323 | * the data pid needed |
| 324 | * @channel: Hardware DMA channel for this pipe |
| 325 | * @split_sc_frame: The low order bits of the frame number the split |
| 326 | * complete should be sent on |
| 327 | */ |
| 328 | struct cvmx_usb_pipe { |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 329 | struct list_head node; |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 330 | struct list_head transactions; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 331 | uint64_t interval; |
| 332 | uint64_t next_tx_frame; |
| 333 | enum cvmx_usb_pipe_flags flags; |
| 334 | enum cvmx_usb_speed device_speed; |
| 335 | enum cvmx_usb_transfer transfer_type; |
| 336 | enum cvmx_usb_direction transfer_dir; |
| 337 | int multi_count; |
| 338 | uint16_t max_packet; |
| 339 | uint8_t device_addr; |
| 340 | uint8_t endpoint_num; |
| 341 | uint8_t hub_device_addr; |
| 342 | uint8_t hub_port; |
| 343 | uint8_t pid_toggle; |
| 344 | uint8_t channel; |
| 345 | int8_t split_sc_frame; |
| 346 | }; |
| 347 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 348 | struct cvmx_usb_tx_fifo { |
| 349 | struct { |
| 350 | int channel; |
| 351 | int size; |
| 352 | uint64_t address; |
| 353 | } entry[MAX_CHANNELS+1]; |
| 354 | int head; |
| 355 | int tail; |
| 356 | }; |
| 357 | |
| 358 | /** |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 359 | * struct cvmx_usb_state - the state of the USB block |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 360 | * |
| 361 | * init_flags: Flags passed to initialize. |
| 362 | * index: Which USB block this is for. |
| 363 | * idle_hardware_channels: Bit set for every idle hardware channel. |
| 364 | * usbcx_hprt: Stored port status so we don't need to read a CSR to |
| 365 | * determine splits. |
| 366 | * pipe_for_channel: Map channels to pipes. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 367 | * pipe: Storage for pipes. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 368 | * indent: Used by debug output to indent functions. |
| 369 | * port_status: Last port status used for change notification. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 370 | * idle_pipes: List of open pipes that have no transactions. |
| 371 | * active_pipes: Active pipes indexed by transfer type. |
| 372 | * frame_number: Increments every SOF interrupt for time keeping. |
| 373 | * active_split: Points to the current active split, or NULL. |
| 374 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 375 | struct cvmx_usb_state { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 376 | int init_flags; |
| 377 | int index; |
| 378 | int idle_hardware_channels; |
| 379 | union cvmx_usbcx_hprt usbcx_hprt; |
| 380 | struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS]; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 381 | int indent; |
| 382 | struct cvmx_usb_port_status port_status; |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 383 | struct list_head idle_pipes; |
| 384 | struct list_head active_pipes[4]; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 385 | uint64_t frame_number; |
| 386 | struct cvmx_usb_transaction *active_split; |
| 387 | struct cvmx_usb_tx_fifo periodic; |
| 388 | struct cvmx_usb_tx_fifo nonperiodic; |
| 389 | }; |
| 390 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 391 | struct octeon_hcd { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 392 | spinlock_t lock; |
Aaro Koskinen | a24ed35 | 2013-07-30 23:43:05 +0300 | [diff] [blame] | 393 | struct cvmx_usb_state usb; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 394 | }; |
| 395 | |
Aaro Koskinen | 203d776 | 2015-03-28 21:24:34 +0200 | [diff] [blame] | 396 | /* This macro spins on a register waiting for it to reach a condition. */ |
| 397 | #define CVMX_WAIT_FOR_FIELD32(address, _union, cond, timeout_usec) \ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 398 | ({int result; \ |
| 399 | do { \ |
| 400 | uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \ |
| 401 | octeon_get_clock_rate() / 1000000; \ |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 402 | union _union c; \ |
| 403 | \ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 404 | while (1) { \ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 405 | c.u32 = cvmx_usb_read_csr32(usb, address); \ |
Aaro Koskinen | 203d776 | 2015-03-28 21:24:34 +0200 | [diff] [blame] | 406 | \ |
| 407 | if (cond) { \ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 408 | result = 0; \ |
| 409 | break; \ |
| 410 | } else if (cvmx_get_cycle() > done) { \ |
| 411 | result = -1; \ |
| 412 | break; \ |
| 413 | } else \ |
| 414 | cvmx_wait(100); \ |
| 415 | } \ |
| 416 | } while (0); \ |
| 417 | result; }) |
| 418 | |
| 419 | /* |
| 420 | * This macro logically sets a single field in a CSR. It does the sequence |
| 421 | * read, modify, and write |
| 422 | */ |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 423 | #define USB_SET_FIELD32(address, _union, field, value) \ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 424 | do { \ |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 425 | union _union c; \ |
| 426 | \ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 427 | c.u32 = cvmx_usb_read_csr32(usb, address); \ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 428 | c.s.field = value; \ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 429 | cvmx_usb_write_csr32(usb, address, c.u32); \ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 430 | } while (0) |
| 431 | |
| 432 | /* Returns the IO address to push/pop stuff data from the FIFOs */ |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 433 | #define USB_FIFO_ADDRESS(channel, usb_index) \ |
| 434 | (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 435 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 436 | /** |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 437 | * struct octeon_temp_buffer - a bounce buffer for USB transfers |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 438 | * @orig_buffer: the original buffer passed by the USB stack |
| 439 | * @data: the newly allocated temporary buffer (excluding meta-data) |
| 440 | * |
| 441 | * Both the DMA engine and FIFO mode will always transfer full 32-bit words. If |
| 442 | * the buffer is too short, we need to allocate a temporary one, and this struct |
| 443 | * represents it. |
| 444 | */ |
| 445 | struct octeon_temp_buffer { |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 446 | void *orig_buffer; |
| 447 | u8 data[0]; |
| 448 | }; |
| 449 | |
Aaro Koskinen | 2e6ac45 | 2014-11-07 23:43:33 +0200 | [diff] [blame] | 450 | static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p) |
| 451 | { |
| 452 | return container_of(p, struct octeon_hcd, usb); |
| 453 | } |
| 454 | |
| 455 | static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p) |
| 456 | { |
| 457 | return container_of((void *)p, struct usb_hcd, hcd_priv); |
| 458 | } |
| 459 | |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 460 | /** |
| 461 | * octeon_alloc_temp_buffer - allocate a temporary buffer for USB transfer |
| 462 | * (if needed) |
| 463 | * @urb: URB. |
| 464 | * @mem_flags: Memory allocation flags. |
| 465 | * |
| 466 | * This function allocates a temporary bounce buffer whenever it's needed |
| 467 | * due to HW limitations. |
| 468 | */ |
| 469 | static int octeon_alloc_temp_buffer(struct urb *urb, gfp_t mem_flags) |
| 470 | { |
| 471 | struct octeon_temp_buffer *temp; |
| 472 | |
| 473 | if (urb->num_sgs || urb->sg || |
| 474 | (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) || |
| 475 | !(urb->transfer_buffer_length % sizeof(u32))) |
| 476 | return 0; |
| 477 | |
| 478 | temp = kmalloc(ALIGN(urb->transfer_buffer_length, sizeof(u32)) + |
| 479 | sizeof(*temp), mem_flags); |
| 480 | if (!temp) |
| 481 | return -ENOMEM; |
| 482 | |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 483 | temp->orig_buffer = urb->transfer_buffer; |
| 484 | if (usb_urb_dir_out(urb)) |
| 485 | memcpy(temp->data, urb->transfer_buffer, |
| 486 | urb->transfer_buffer_length); |
| 487 | urb->transfer_buffer = temp->data; |
| 488 | urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER; |
| 489 | |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * octeon_free_temp_buffer - free a temporary buffer used by USB transfers. |
| 495 | * @urb: URB. |
| 496 | * |
| 497 | * Frees a buffer allocated by octeon_alloc_temp_buffer(). |
| 498 | */ |
| 499 | static void octeon_free_temp_buffer(struct urb *urb) |
| 500 | { |
| 501 | struct octeon_temp_buffer *temp; |
Johan Hovold | b97c3c1 | 2015-04-23 16:06:52 +0200 | [diff] [blame] | 502 | size_t length; |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 503 | |
| 504 | if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER)) |
| 505 | return; |
| 506 | |
| 507 | temp = container_of(urb->transfer_buffer, struct octeon_temp_buffer, |
| 508 | data); |
Johan Hovold | b97c3c1 | 2015-04-23 16:06:52 +0200 | [diff] [blame] | 509 | if (usb_urb_dir_in(urb)) { |
| 510 | if (usb_pipeisoc(urb->pipe)) |
| 511 | length = urb->transfer_buffer_length; |
| 512 | else |
| 513 | length = urb->actual_length; |
| 514 | |
| 515 | memcpy(temp->orig_buffer, urb->transfer_buffer, length); |
| 516 | } |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 517 | urb->transfer_buffer = temp->orig_buffer; |
| 518 | urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER; |
Aaro Koskinen | 31170da | 2015-03-22 17:37:49 +0200 | [diff] [blame] | 519 | kfree(temp); |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | /** |
| 523 | * octeon_map_urb_for_dma - Octeon-specific map_urb_for_dma(). |
| 524 | * @hcd: USB HCD structure. |
| 525 | * @urb: URB. |
| 526 | * @mem_flags: Memory allocation flags. |
| 527 | */ |
| 528 | static int octeon_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
| 529 | gfp_t mem_flags) |
| 530 | { |
| 531 | int ret; |
| 532 | |
| 533 | ret = octeon_alloc_temp_buffer(urb, mem_flags); |
| 534 | if (ret) |
| 535 | return ret; |
| 536 | |
| 537 | ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); |
| 538 | if (ret) |
| 539 | octeon_free_temp_buffer(urb); |
| 540 | |
| 541 | return ret; |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * octeon_unmap_urb_for_dma - Octeon-specific unmap_urb_for_dma() |
| 546 | * @hcd: USB HCD structure. |
| 547 | * @urb: URB. |
| 548 | */ |
| 549 | static void octeon_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
| 550 | { |
| 551 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
| 552 | octeon_free_temp_buffer(urb); |
| 553 | } |
| 554 | |
| 555 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 556 | * Read a USB 32bit CSR. It performs the necessary address swizzle |
| 557 | * for 32bit CSRs and logs the value in a readable format if |
| 558 | * debugging is on. |
| 559 | * |
| 560 | * @usb: USB block this access is for |
| 561 | * @address: 64bit address to read |
| 562 | * |
| 563 | * Returns: Result of the read |
| 564 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 565 | static inline uint32_t cvmx_usb_read_csr32(struct cvmx_usb_state *usb, |
| 566 | uint64_t address) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 567 | { |
| 568 | uint32_t result = cvmx_read64_uint32(address ^ 4); |
| 569 | return result; |
| 570 | } |
| 571 | |
| 572 | |
| 573 | /** |
| 574 | * Write a USB 32bit CSR. It performs the necessary address |
| 575 | * swizzle for 32bit CSRs and logs the value in a readable format |
| 576 | * if debugging is on. |
| 577 | * |
| 578 | * @usb: USB block this access is for |
| 579 | * @address: 64bit address to write |
| 580 | * @value: Value to write |
| 581 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 582 | static inline void cvmx_usb_write_csr32(struct cvmx_usb_state *usb, |
| 583 | uint64_t address, uint32_t value) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 584 | { |
| 585 | cvmx_write64_uint32(address ^ 4, value); |
| 586 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); |
| 587 | } |
| 588 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 589 | /** |
| 590 | * Return non zero if this pipe connects to a non HIGH speed |
| 591 | * device through a high speed hub. |
| 592 | * |
| 593 | * @usb: USB block this access is for |
| 594 | * @pipe: Pipe to check |
| 595 | * |
| 596 | * Returns: Non zero if we need to do split transactions |
| 597 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 598 | static inline int cvmx_usb_pipe_needs_split(struct cvmx_usb_state *usb, |
| 599 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 600 | { |
Aaro Koskinen | aa87afe | 2013-10-06 22:22:37 +0300 | [diff] [blame] | 601 | return pipe->device_speed != CVMX_USB_SPEED_HIGH && |
| 602 | usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | |
| 606 | /** |
| 607 | * Trivial utility function to return the correct PID for a pipe |
| 608 | * |
| 609 | * @pipe: pipe to check |
| 610 | * |
| 611 | * Returns: PID for pipe |
| 612 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 613 | static inline int cvmx_usb_get_data_pid(struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 614 | { |
| 615 | if (pipe->pid_toggle) |
| 616 | return 2; /* Data1 */ |
Sarah Khan | c9a114e | 2014-10-07 06:33:54 +0530 | [diff] [blame] | 617 | return 0; /* Data0 */ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 618 | } |
| 619 | |
Aaro Koskinen | a3d3390 | 2015-03-28 21:24:31 +0200 | [diff] [blame] | 620 | static void cvmx_fifo_setup(struct cvmx_usb_state *usb) |
Aaro Koskinen | 2263251 | 2015-03-22 17:37:56 +0200 | [diff] [blame] | 621 | { |
| 622 | union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3; |
| 623 | union cvmx_usbcx_gnptxfsiz npsiz; |
| 624 | union cvmx_usbcx_hptxfsiz psiz; |
| 625 | |
| 626 | usbcx_ghwcfg3.u32 = cvmx_usb_read_csr32(usb, |
| 627 | CVMX_USBCX_GHWCFG3(usb->index)); |
| 628 | |
| 629 | /* |
| 630 | * Program the USBC_GRXFSIZ register to select the size of the receive |
| 631 | * FIFO (25%). |
| 632 | */ |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 633 | USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), cvmx_usbcx_grxfsiz, |
| 634 | rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4); |
Aaro Koskinen | 2263251 | 2015-03-22 17:37:56 +0200 | [diff] [blame] | 635 | |
| 636 | /* |
| 637 | * Program the USBC_GNPTXFSIZ register to select the size and the start |
| 638 | * address of the non-periodic transmit FIFO for nonperiodic |
| 639 | * transactions (50%). |
| 640 | */ |
| 641 | npsiz.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index)); |
| 642 | npsiz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2; |
| 643 | npsiz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4; |
| 644 | cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), npsiz.u32); |
| 645 | |
| 646 | /* |
| 647 | * Program the USBC_HPTXFSIZ register to select the size and start |
| 648 | * address of the periodic transmit FIFO for periodic transactions |
| 649 | * (25%). |
| 650 | */ |
| 651 | psiz.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index)); |
| 652 | psiz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4; |
| 653 | psiz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4; |
| 654 | cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), psiz.u32); |
| 655 | |
| 656 | /* Flush all FIFOs */ |
| 657 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 658 | cvmx_usbcx_grstctl, txfnum, 0x10); |
Aaro Koskinen | 2263251 | 2015-03-22 17:37:56 +0200 | [diff] [blame] | 659 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 660 | cvmx_usbcx_grstctl, txfflsh, 1); |
Aaro Koskinen | 2263251 | 2015-03-22 17:37:56 +0200 | [diff] [blame] | 661 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
Aaro Koskinen | 203d776 | 2015-03-28 21:24:34 +0200 | [diff] [blame] | 662 | cvmx_usbcx_grstctl, c.s.txfflsh == 0, 100); |
Aaro Koskinen | 2263251 | 2015-03-22 17:37:56 +0200 | [diff] [blame] | 663 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 664 | cvmx_usbcx_grstctl, rxfflsh, 1); |
Aaro Koskinen | 2263251 | 2015-03-22 17:37:56 +0200 | [diff] [blame] | 665 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
Aaro Koskinen | 203d776 | 2015-03-28 21:24:34 +0200 | [diff] [blame] | 666 | cvmx_usbcx_grstctl, c.s.rxfflsh == 0, 100); |
Aaro Koskinen | 2263251 | 2015-03-22 17:37:56 +0200 | [diff] [blame] | 667 | } |
| 668 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 669 | /** |
Aaro Koskinen | eb04114 | 2015-03-22 17:37:59 +0200 | [diff] [blame] | 670 | * Shutdown a USB port after a call to cvmx_usb_initialize(). |
| 671 | * The port should be disabled with all pipes closed when this |
| 672 | * function is called. |
| 673 | * |
| 674 | * @usb: USB device state populated by cvmx_usb_initialize(). |
| 675 | * |
| 676 | * Returns: 0 or a negative error code. |
| 677 | */ |
| 678 | static int cvmx_usb_shutdown(struct cvmx_usb_state *usb) |
| 679 | { |
| 680 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; |
| 681 | |
| 682 | /* Make sure all pipes are closed */ |
| 683 | if (!list_empty(&usb->idle_pipes) || |
| 684 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS]) || |
| 685 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT]) || |
| 686 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_CONTROL]) || |
| 687 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_BULK])) |
| 688 | return -EBUSY; |
| 689 | |
| 690 | /* Disable the clocks and put them in power on reset */ |
| 691 | usbn_clk_ctl.u64 = cvmx_read64_uint64(CVMX_USBNX_CLK_CTL(usb->index)); |
| 692 | usbn_clk_ctl.s.enable = 1; |
| 693 | usbn_clk_ctl.s.por = 1; |
| 694 | usbn_clk_ctl.s.hclk_rst = 1; |
| 695 | usbn_clk_ctl.s.prst = 0; |
| 696 | usbn_clk_ctl.s.hrst = 0; |
| 697 | cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64); |
| 698 | return 0; |
| 699 | } |
| 700 | |
| 701 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 702 | * Initialize a USB port for use. This must be called before any |
| 703 | * other access to the Octeon USB port is made. The port starts |
| 704 | * off in the disabled state. |
| 705 | * |
Aaro Koskinen | 6ad9c95 | 2015-03-22 17:38:01 +0200 | [diff] [blame] | 706 | * @dev: Pointer to struct device for logging purposes. |
Aaro Koskinen | b5e79e6 | 2015-03-22 17:37:53 +0200 | [diff] [blame] | 707 | * @usb: Pointer to struct cvmx_usb_state. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 708 | * |
| 709 | * Returns: 0 or a negative error code. |
| 710 | */ |
Aaro Koskinen | 6ad9c95 | 2015-03-22 17:38:01 +0200 | [diff] [blame] | 711 | static int cvmx_usb_initialize(struct device *dev, |
| 712 | struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 713 | { |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 714 | int channel; |
| 715 | int divisor; |
Aaro Koskinen | 6ad9c95 | 2015-03-22 17:38:01 +0200 | [diff] [blame] | 716 | int retries = 0; |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 717 | union cvmx_usbcx_hcfg usbcx_hcfg; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 718 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; |
Aaro Koskinen | 6ad9c95 | 2015-03-22 17:38:01 +0200 | [diff] [blame] | 719 | union cvmx_usbcx_gintsts usbc_gintsts; |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 720 | union cvmx_usbcx_gahbcfg usbcx_gahbcfg; |
| 721 | union cvmx_usbcx_gintmsk usbcx_gintmsk; |
| 722 | union cvmx_usbcx_gusbcfg usbcx_gusbcfg; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 723 | union cvmx_usbnx_usbp_ctl_status usbn_usbp_ctl_status; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 724 | |
Aaro Koskinen | 6ad9c95 | 2015-03-22 17:38:01 +0200 | [diff] [blame] | 725 | retry: |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 726 | /* |
| 727 | * Power On Reset and PHY Initialization |
| 728 | * |
| 729 | * 1. Wait for DCOK to assert (nothing to do) |
| 730 | * |
| 731 | * 2a. Write USBN0/1_CLK_CTL[POR] = 1 and |
| 732 | * USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 |
| 733 | */ |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 734 | usbn_clk_ctl.u64 = cvmx_read64_uint64(CVMX_USBNX_CLK_CTL(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 735 | usbn_clk_ctl.s.por = 1; |
| 736 | usbn_clk_ctl.s.hrst = 0; |
| 737 | usbn_clk_ctl.s.prst = 0; |
| 738 | usbn_clk_ctl.s.hclk_rst = 0; |
| 739 | usbn_clk_ctl.s.enable = 0; |
| 740 | /* |
| 741 | * 2b. Select the USB reference clock/crystal parameters by writing |
| 742 | * appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] |
| 743 | */ |
| 744 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) { |
| 745 | /* |
| 746 | * The USB port uses 12/24/48MHz 2.5V board clock |
| 747 | * source at USB_XO. USB_XI should be tied to GND. |
| 748 | * Most Octeon evaluation boards require this setting |
| 749 | */ |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 750 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || |
| 751 | OCTEON_IS_MODEL(OCTEON_CN56XX) || |
| 752 | OCTEON_IS_MODEL(OCTEON_CN50XX)) |
| 753 | /* From CN56XX,CN50XX,CN31XX,CN30XX manuals */ |
| 754 | usbn_clk_ctl.s.p_rtype = 2; /* p_rclk=1 & p_xenbn=0 */ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 755 | else |
| 756 | /* From CN52XX manual */ |
Aaro Koskinen | 34b70b9 | 2013-10-10 23:25:28 +0300 | [diff] [blame] | 757 | usbn_clk_ctl.s.p_rtype = 1; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 758 | |
Aaro Koskinen | b5e79e6 | 2015-03-22 17:37:53 +0200 | [diff] [blame] | 759 | switch (usb->init_flags & |
| 760 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 761 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: |
| 762 | usbn_clk_ctl.s.p_c_sel = 0; |
| 763 | break; |
| 764 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: |
| 765 | usbn_clk_ctl.s.p_c_sel = 1; |
| 766 | break; |
| 767 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: |
| 768 | usbn_clk_ctl.s.p_c_sel = 2; |
| 769 | break; |
| 770 | } |
| 771 | } else { |
| 772 | /* |
| 773 | * The USB port uses a 12MHz crystal as clock source |
| 774 | * at USB_XO and USB_XI |
| 775 | */ |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 776 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 777 | /* From CN31XX,CN30XX manual */ |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 778 | usbn_clk_ctl.s.p_rtype = 3; /* p_rclk=1 & p_xenbn=1 */ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 779 | else |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 780 | /* From CN56XX,CN52XX,CN50XX manuals. */ |
Aaro Koskinen | 34b70b9 | 2013-10-10 23:25:28 +0300 | [diff] [blame] | 781 | usbn_clk_ctl.s.p_rtype = 0; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 782 | |
| 783 | usbn_clk_ctl.s.p_c_sel = 0; |
| 784 | } |
| 785 | /* |
| 786 | * 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and |
| 787 | * setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down |
| 788 | * such that USB is as close as possible to 125Mhz |
| 789 | */ |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 790 | divisor = DIV_ROUND_UP(octeon_get_clock_rate(), 125000000); |
| 791 | /* Lower than 4 doesn't seem to work properly */ |
| 792 | if (divisor < 4) |
| 793 | divisor = 4; |
| 794 | usbn_clk_ctl.s.divide = divisor; |
| 795 | usbn_clk_ctl.s.divide2 = 0; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 796 | cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64); |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 797 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 798 | /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */ |
| 799 | usbn_clk_ctl.s.hclk_rst = 1; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 800 | cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 801 | /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */ |
| 802 | cvmx_wait(64); |
| 803 | /* |
| 804 | * 3. Program the power-on reset field in the USBN clock-control |
| 805 | * register: |
| 806 | * USBN_CLK_CTL[POR] = 0 |
| 807 | */ |
| 808 | usbn_clk_ctl.s.por = 0; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 809 | cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 810 | /* 4. Wait 1 ms for PHY clock to start */ |
| 811 | mdelay(1); |
| 812 | /* |
| 813 | * 5. Program the Reset input from automatic test equipment field in the |
| 814 | * USBP control and status register: |
| 815 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 1 |
| 816 | */ |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 817 | usbn_usbp_ctl_status.u64 = |
| 818 | cvmx_read64_uint64(CVMX_USBNX_USBP_CTL_STATUS(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 819 | usbn_usbp_ctl_status.s.ate_reset = 1; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 820 | cvmx_write64_uint64(CVMX_USBNX_USBP_CTL_STATUS(usb->index), |
| 821 | usbn_usbp_ctl_status.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 822 | /* 6. Wait 10 cycles */ |
| 823 | cvmx_wait(10); |
| 824 | /* |
| 825 | * 7. Clear ATE_RESET field in the USBN clock-control register: |
| 826 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 0 |
| 827 | */ |
| 828 | usbn_usbp_ctl_status.s.ate_reset = 0; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 829 | cvmx_write64_uint64(CVMX_USBNX_USBP_CTL_STATUS(usb->index), |
| 830 | usbn_usbp_ctl_status.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 831 | /* |
| 832 | * 8. Program the PHY reset field in the USBN clock-control register: |
| 833 | * USBN_CLK_CTL[PRST] = 1 |
| 834 | */ |
| 835 | usbn_clk_ctl.s.prst = 1; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 836 | cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 837 | /* |
| 838 | * 9. Program the USBP control and status register to select host or |
| 839 | * device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for |
| 840 | * device |
| 841 | */ |
| 842 | usbn_usbp_ctl_status.s.hst_mode = 0; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 843 | cvmx_write64_uint64(CVMX_USBNX_USBP_CTL_STATUS(usb->index), |
| 844 | usbn_usbp_ctl_status.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 845 | /* 10. Wait 1 us */ |
| 846 | udelay(1); |
| 847 | /* |
| 848 | * 11. Program the hreset_n field in the USBN clock-control register: |
| 849 | * USBN_CLK_CTL[HRST] = 1 |
| 850 | */ |
| 851 | usbn_clk_ctl.s.hrst = 1; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 852 | cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 853 | /* 12. Proceed to USB core initialization */ |
| 854 | usbn_clk_ctl.s.enable = 1; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 855 | cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 856 | udelay(1); |
| 857 | |
| 858 | /* |
| 859 | * USB Core Initialization |
| 860 | * |
| 861 | * 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to |
| 862 | * determine USB core configuration parameters. |
| 863 | * |
| 864 | * Nothing needed |
| 865 | * |
| 866 | * 2. Program the following fields in the global AHB configuration |
| 867 | * register (USBC_GAHBCFG) |
| 868 | * DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode |
| 869 | * Burst length, USBC_GAHBCFG[HBSTLEN] = 0 |
| 870 | * Nonperiodic TxFIFO empty level (slave mode only), |
| 871 | * USBC_GAHBCFG[NPTXFEMPLVL] |
| 872 | * Periodic TxFIFO empty level (slave mode only), |
| 873 | * USBC_GAHBCFG[PTXFEMPLVL] |
| 874 | * Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 |
| 875 | */ |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 876 | usbcx_gahbcfg.u32 = 0; |
| 877 | usbcx_gahbcfg.s.dmaen = !(usb->init_flags & |
| 878 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA); |
| 879 | usbcx_gahbcfg.s.hbstlen = 0; |
| 880 | usbcx_gahbcfg.s.nptxfemplvl = 1; |
| 881 | usbcx_gahbcfg.s.ptxfemplvl = 1; |
| 882 | usbcx_gahbcfg.s.glblintrmsk = 1; |
| 883 | cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index), |
| 884 | usbcx_gahbcfg.u32); |
| 885 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 886 | /* |
| 887 | * 3. Program the following fields in USBC_GUSBCFG register. |
| 888 | * HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0 |
| 889 | * ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0 |
| 890 | * USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5 |
| 891 | * PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0 |
| 892 | */ |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 893 | usbcx_gusbcfg.u32 = cvmx_usb_read_csr32(usb, |
| 894 | CVMX_USBCX_GUSBCFG(usb->index)); |
| 895 | usbcx_gusbcfg.s.toutcal = 0; |
| 896 | usbcx_gusbcfg.s.ddrsel = 0; |
| 897 | usbcx_gusbcfg.s.usbtrdtim = 0x5; |
| 898 | usbcx_gusbcfg.s.phylpwrclksel = 0; |
| 899 | cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index), |
| 900 | usbcx_gusbcfg.u32); |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 901 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 902 | /* |
| 903 | * 4. The software must unmask the following bits in the USBC_GINTMSK |
| 904 | * register. |
| 905 | * OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1 |
| 906 | * Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1 |
| 907 | */ |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 908 | usbcx_gintmsk.u32 = cvmx_usb_read_csr32(usb, |
| 909 | CVMX_USBCX_GINTMSK(usb->index)); |
| 910 | usbcx_gintmsk.s.otgintmsk = 1; |
| 911 | usbcx_gintmsk.s.modemismsk = 1; |
| 912 | usbcx_gintmsk.s.hchintmsk = 1; |
| 913 | usbcx_gintmsk.s.sofmsk = 0; |
| 914 | /* We need RX FIFO interrupts if we don't have DMA */ |
| 915 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
| 916 | usbcx_gintmsk.s.rxflvlmsk = 1; |
| 917 | cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index), |
| 918 | usbcx_gintmsk.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 919 | |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 920 | /* |
| 921 | * Disable all channel interrupts. We'll enable them per channel later. |
| 922 | */ |
| 923 | for (channel = 0; channel < 8; channel++) |
| 924 | cvmx_usb_write_csr32(usb, |
| 925 | CVMX_USBCX_HCINTMSKX(channel, usb->index), |
| 926 | 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 927 | |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 928 | /* |
| 929 | * Host Port Initialization |
| 930 | * |
| 931 | * 1. Program the host-port interrupt-mask field to unmask, |
| 932 | * USBC_GINTMSK[PRTINT] = 1 |
| 933 | */ |
| 934 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 935 | cvmx_usbcx_gintmsk, prtintmsk, 1); |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 936 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 937 | cvmx_usbcx_gintmsk, disconnintmsk, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 938 | |
Aaro Koskinen | edc16d8 | 2015-03-22 17:38:02 +0200 | [diff] [blame] | 939 | /* |
| 940 | * 2. Program the USBC_HCFG register to select full-speed host |
| 941 | * or high-speed host. |
| 942 | */ |
| 943 | usbcx_hcfg.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index)); |
| 944 | usbcx_hcfg.s.fslssupp = 0; |
| 945 | usbcx_hcfg.s.fslspclksel = 0; |
| 946 | cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 947 | |
Aaro Koskinen | 164814b | 2015-03-22 17:37:57 +0200 | [diff] [blame] | 948 | cvmx_fifo_setup(usb); |
| 949 | |
Aaro Koskinen | 6ad9c95 | 2015-03-22 17:38:01 +0200 | [diff] [blame] | 950 | /* |
| 951 | * If the controller is getting port events right after the reset, it |
| 952 | * means the initialization failed. Try resetting the controller again |
| 953 | * in such case. This is seen to happen after cold boot on DSR-1000N. |
| 954 | */ |
| 955 | usbc_gintsts.u32 = cvmx_usb_read_csr32(usb, |
| 956 | CVMX_USBCX_GINTSTS(usb->index)); |
| 957 | cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), |
| 958 | usbc_gintsts.u32); |
| 959 | dev_dbg(dev, "gintsts after reset: 0x%x\n", (int)usbc_gintsts.u32); |
| 960 | if (!usbc_gintsts.s.disconnint && !usbc_gintsts.s.prtint) |
| 961 | return 0; |
| 962 | if (retries++ >= 5) |
| 963 | return -EAGAIN; |
| 964 | dev_info(dev, "controller reset failed (gintsts=0x%x) - retrying\n", |
| 965 | (int)usbc_gintsts.u32); |
| 966 | msleep(50); |
| 967 | cvmx_usb_shutdown(usb); |
| 968 | msleep(50); |
| 969 | goto retry; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 970 | } |
| 971 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 972 | /** |
Aaro Koskinen | b0c8c72 | 2015-03-22 17:37:58 +0200 | [diff] [blame] | 973 | * Reset a USB port. After this call succeeds, the USB port is |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 974 | * online and servicing requests. |
| 975 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 976 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 977 | */ |
Aaro Koskinen | b0c8c72 | 2015-03-22 17:37:58 +0200 | [diff] [blame] | 978 | static void cvmx_usb_reset_port(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 979 | { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 980 | usb->usbcx_hprt.u32 = cvmx_usb_read_csr32(usb, |
| 981 | CVMX_USBCX_HPRT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 982 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 983 | /* Program the port reset bit to start the reset process */ |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 984 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt, |
Raluca Oncioiu | b49f113 | 2014-03-08 00:44:12 +0200 | [diff] [blame] | 985 | prtrst, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 986 | |
| 987 | /* |
| 988 | * Wait at least 50ms (high speed), or 10ms (full speed) for the reset |
| 989 | * process to complete. |
| 990 | */ |
| 991 | mdelay(50); |
| 992 | |
| 993 | /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */ |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 994 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 995 | prtrst, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 996 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 997 | /* |
| 998 | * Read the port speed field to get the enumerated speed, |
| 999 | * USBC_HPRT[PRTSPD]. |
| 1000 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1001 | usb->usbcx_hprt.u32 = cvmx_usb_read_csr32(usb, |
| 1002 | CVMX_USBCX_HPRT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1003 | } |
| 1004 | |
| 1005 | |
| 1006 | /** |
| 1007 | * Disable a USB port. After this call the USB port will not |
| 1008 | * generate data transfers and will not generate events. |
| 1009 | * Transactions in process will fail and call their |
| 1010 | * associated callbacks. |
| 1011 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1012 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1013 | * |
| 1014 | * Returns: 0 or a negative error code. |
| 1015 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1016 | static int cvmx_usb_disable(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1017 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1018 | /* Disable the port */ |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1019 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1020 | prtena, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1021 | return 0; |
| 1022 | } |
| 1023 | |
| 1024 | |
| 1025 | /** |
| 1026 | * Get the current state of the USB port. Use this call to |
| 1027 | * determine if the usb port has anything connected, is enabled, |
| 1028 | * or has some sort of error condition. The return value of this |
| 1029 | * call has "changed" bits to signal of the value of some fields |
Aaro Koskinen | 29a202f | 2013-10-06 22:22:26 +0300 | [diff] [blame] | 1030 | * have changed between calls. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1031 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1032 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1033 | * |
| 1034 | * Returns: Port status information |
| 1035 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1036 | static struct cvmx_usb_port_status cvmx_usb_get_status( |
| 1037 | struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1038 | { |
| 1039 | union cvmx_usbcx_hprt usbc_hprt; |
| 1040 | struct cvmx_usb_port_status result; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1041 | |
| 1042 | memset(&result, 0, sizeof(result)); |
| 1043 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1044 | usbc_hprt.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1045 | result.port_enabled = usbc_hprt.s.prtena; |
| 1046 | result.port_over_current = usbc_hprt.s.prtovrcurract; |
| 1047 | result.port_powered = usbc_hprt.s.prtpwr; |
| 1048 | result.port_speed = usbc_hprt.s.prtspd; |
| 1049 | result.connected = usbc_hprt.s.prtconnsts; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1050 | result.connect_change = |
| 1051 | (result.connected != usb->port_status.connected); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1052 | |
| 1053 | return result; |
| 1054 | } |
| 1055 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1056 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1057 | * Open a virtual pipe between the host and a USB device. A pipe |
| 1058 | * must be opened before data can be transferred between a device |
| 1059 | * and Octeon. |
| 1060 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1061 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1062 | * @device_addr: |
| 1063 | * USB device address to open the pipe to |
| 1064 | * (0-127). |
| 1065 | * @endpoint_num: |
| 1066 | * USB endpoint number to open the pipe to |
| 1067 | * (0-15). |
| 1068 | * @device_speed: |
| 1069 | * The speed of the device the pipe is going |
| 1070 | * to. This must match the device's speed, |
| 1071 | * which may be different than the port speed. |
| 1072 | * @max_packet: The maximum packet length the device can |
| 1073 | * transmit/receive (low speed=0-8, full |
| 1074 | * speed=0-1023, high speed=0-1024). This value |
| 1075 | * comes from the standard endpoint descriptor |
| 1076 | * field wMaxPacketSize bits <10:0>. |
| 1077 | * @transfer_type: |
| 1078 | * The type of transfer this pipe is for. |
| 1079 | * @transfer_dir: |
| 1080 | * The direction the pipe is in. This is not |
| 1081 | * used for control pipes. |
| 1082 | * @interval: For ISOCHRONOUS and INTERRUPT transfers, |
| 1083 | * this is how often the transfer is scheduled |
| 1084 | * for. All other transfers should specify |
| 1085 | * zero. The units are in frames (8000/sec at |
| 1086 | * high speed, 1000/sec for full speed). |
| 1087 | * @multi_count: |
| 1088 | * For high speed devices, this is the maximum |
| 1089 | * allowed number of packet per microframe. |
| 1090 | * Specify zero for non high speed devices. This |
| 1091 | * value comes from the standard endpoint descriptor |
| 1092 | * field wMaxPacketSize bits <12:11>. |
| 1093 | * @hub_device_addr: |
| 1094 | * Hub device address this device is connected |
| 1095 | * to. Devices connected directly to Octeon |
| 1096 | * use zero. This is only used when the device |
| 1097 | * is full/low speed behind a high speed hub. |
| 1098 | * The address will be of the high speed hub, |
| 1099 | * not and full speed hubs after it. |
| 1100 | * @hub_port: Which port on the hub the device is |
| 1101 | * connected. Use zero for devices connected |
| 1102 | * directly to Octeon. Like hub_device_addr, |
| 1103 | * this is only used for full/low speed |
| 1104 | * devices behind a high speed hub. |
| 1105 | * |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1106 | * Returns: A non-NULL value is a pipe. NULL means an error. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1107 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1108 | static struct cvmx_usb_pipe *cvmx_usb_open_pipe(struct cvmx_usb_state *usb, |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 1109 | int device_addr, |
| 1110 | int endpoint_num, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1111 | enum cvmx_usb_speed |
| 1112 | device_speed, |
| 1113 | int max_packet, |
| 1114 | enum cvmx_usb_transfer |
| 1115 | transfer_type, |
| 1116 | enum cvmx_usb_direction |
| 1117 | transfer_dir, |
| 1118 | int interval, int multi_count, |
| 1119 | int hub_device_addr, |
| 1120 | int hub_port) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1121 | { |
| 1122 | struct cvmx_usb_pipe *pipe; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1123 | |
Aaro Koskinen | d2695a8 | 2013-10-10 23:25:32 +0300 | [diff] [blame] | 1124 | pipe = kzalloc(sizeof(*pipe), GFP_ATOMIC); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1125 | if (!pipe) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1126 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1127 | if ((device_speed == CVMX_USB_SPEED_HIGH) && |
| 1128 | (transfer_dir == CVMX_USB_DIRECTION_OUT) && |
| 1129 | (transfer_type == CVMX_USB_TRANSFER_BULK)) |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 1130 | pipe->flags |= CVMX_USB_PIPE_FLAGS_NEED_PING; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1131 | pipe->device_addr = device_addr; |
| 1132 | pipe->endpoint_num = endpoint_num; |
| 1133 | pipe->device_speed = device_speed; |
| 1134 | pipe->max_packet = max_packet; |
| 1135 | pipe->transfer_type = transfer_type; |
| 1136 | pipe->transfer_dir = transfer_dir; |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1137 | INIT_LIST_HEAD(&pipe->transactions); |
| 1138 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1139 | /* |
| 1140 | * All pipes use interval to rate limit NAK processing. Force an |
| 1141 | * interval if one wasn't supplied |
| 1142 | */ |
| 1143 | if (!interval) |
| 1144 | interval = 1; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1145 | if (cvmx_usb_pipe_needs_split(usb, pipe)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1146 | pipe->interval = interval*8; |
| 1147 | /* Force start splits to be schedule on uFrame 0 */ |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1148 | pipe->next_tx_frame = ((usb->frame_number+7)&~7) + |
| 1149 | pipe->interval; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1150 | } else { |
| 1151 | pipe->interval = interval; |
| 1152 | pipe->next_tx_frame = usb->frame_number + pipe->interval; |
| 1153 | } |
| 1154 | pipe->multi_count = multi_count; |
| 1155 | pipe->hub_device_addr = hub_device_addr; |
| 1156 | pipe->hub_port = hub_port; |
| 1157 | pipe->pid_toggle = 0; |
| 1158 | pipe->split_sc_frame = -1; |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 1159 | list_add_tail(&pipe->node, &usb->idle_pipes); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1160 | |
| 1161 | /* |
| 1162 | * We don't need to tell the hardware about this pipe yet since |
| 1163 | * it doesn't have any submitted requests |
| 1164 | */ |
| 1165 | |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1166 | return pipe; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1167 | } |
| 1168 | |
| 1169 | |
| 1170 | /** |
| 1171 | * Poll the RX FIFOs and remove data as needed. This function is only used |
| 1172 | * in non DMA mode. It is very important that this function be called quickly |
| 1173 | * enough to prevent FIFO overflow. |
| 1174 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1175 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1176 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1177 | static void cvmx_usb_poll_rx_fifo(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1178 | { |
| 1179 | union cvmx_usbcx_grxstsph rx_status; |
| 1180 | int channel; |
| 1181 | int bytes; |
| 1182 | uint64_t address; |
| 1183 | uint32_t *ptr; |
| 1184 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1185 | rx_status.u32 = cvmx_usb_read_csr32(usb, |
| 1186 | CVMX_USBCX_GRXSTSPH(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1187 | /* Only read data if IN data is there */ |
| 1188 | if (rx_status.s.pktsts != 2) |
| 1189 | return; |
| 1190 | /* Check if no data is available */ |
| 1191 | if (!rx_status.s.bcnt) |
| 1192 | return; |
| 1193 | |
| 1194 | channel = rx_status.s.chnum; |
| 1195 | bytes = rx_status.s.bcnt; |
| 1196 | if (!bytes) |
| 1197 | return; |
| 1198 | |
| 1199 | /* Get where the DMA engine would have written this data */ |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 1200 | address = cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index) + |
| 1201 | channel * 8); |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1202 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1203 | ptr = cvmx_phys_to_ptr(address); |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 1204 | cvmx_write64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel * 8, |
| 1205 | address + bytes); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1206 | |
| 1207 | /* Loop writing the FIFO data for this packet into memory */ |
| 1208 | while (bytes > 0) { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1209 | *ptr++ = cvmx_usb_read_csr32(usb, |
| 1210 | USB_FIFO_ADDRESS(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1211 | bytes -= 4; |
| 1212 | } |
| 1213 | CVMX_SYNCW; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1214 | } |
| 1215 | |
| 1216 | |
| 1217 | /** |
| 1218 | * Fill the TX hardware fifo with data out of the software |
| 1219 | * fifos |
| 1220 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1221 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1222 | * @fifo: Software fifo to use |
| 1223 | * @available: Amount of space in the hardware fifo |
| 1224 | * |
| 1225 | * Returns: Non zero if the hardware fifo was too small and needs |
| 1226 | * to be serviced again. |
| 1227 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1228 | static int cvmx_usb_fill_tx_hw(struct cvmx_usb_state *usb, |
| 1229 | struct cvmx_usb_tx_fifo *fifo, int available) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1230 | { |
| 1231 | /* |
| 1232 | * We're done either when there isn't anymore space or the software FIFO |
| 1233 | * is empty |
| 1234 | */ |
| 1235 | while (available && (fifo->head != fifo->tail)) { |
| 1236 | int i = fifo->tail; |
| 1237 | const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1238 | uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, |
| 1239 | usb->index) ^ 4; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1240 | int words = available; |
| 1241 | |
Carlos E. Garcia | 69e98df | 2015-04-24 09:40:42 -0400 | [diff] [blame] | 1242 | /* Limit the amount of data to what the SW fifo has */ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1243 | if (fifo->entry[i].size <= available) { |
| 1244 | words = fifo->entry[i].size; |
| 1245 | fifo->tail++; |
| 1246 | if (fifo->tail > MAX_CHANNELS) |
| 1247 | fifo->tail = 0; |
| 1248 | } |
| 1249 | |
| 1250 | /* Update the next locations and counts */ |
| 1251 | available -= words; |
| 1252 | fifo->entry[i].address += words * 4; |
| 1253 | fifo->entry[i].size -= words; |
| 1254 | |
| 1255 | /* |
| 1256 | * Write the HW fifo data. The read every three writes is due |
| 1257 | * to an errata on CN3XXX chips |
| 1258 | */ |
| 1259 | while (words > 3) { |
| 1260 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1261 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1262 | cvmx_write64_uint32(csr_address, *ptr++); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1263 | cvmx_read64_uint64( |
| 1264 | CVMX_USBNX_DMA0_INB_CHN0(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1265 | words -= 3; |
| 1266 | } |
| 1267 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1268 | if (--words) { |
| 1269 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1270 | if (--words) |
| 1271 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1272 | } |
| 1273 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); |
| 1274 | } |
| 1275 | return fifo->head != fifo->tail; |
| 1276 | } |
| 1277 | |
| 1278 | |
| 1279 | /** |
| 1280 | * Check the hardware FIFOs and fill them as needed |
| 1281 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1282 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1283 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1284 | static void cvmx_usb_poll_tx_fifo(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1285 | { |
| 1286 | if (usb->periodic.head != usb->periodic.tail) { |
| 1287 | union cvmx_usbcx_hptxsts tx_status; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 1288 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1289 | tx_status.u32 = cvmx_usb_read_csr32(usb, |
| 1290 | CVMX_USBCX_HPTXSTS(usb->index)); |
| 1291 | if (cvmx_usb_fill_tx_hw(usb, &usb->periodic, |
| 1292 | tx_status.s.ptxfspcavail)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1293 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1294 | cvmx_usbcx_gintmsk, ptxfempmsk, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1295 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1296 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1297 | cvmx_usbcx_gintmsk, ptxfempmsk, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1298 | } |
| 1299 | |
| 1300 | if (usb->nonperiodic.head != usb->nonperiodic.tail) { |
| 1301 | union cvmx_usbcx_gnptxsts tx_status; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 1302 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1303 | tx_status.u32 = cvmx_usb_read_csr32(usb, |
| 1304 | CVMX_USBCX_GNPTXSTS(usb->index)); |
| 1305 | if (cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, |
| 1306 | tx_status.s.nptxfspcavail)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1307 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1308 | cvmx_usbcx_gintmsk, nptxfempmsk, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1309 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1310 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1311 | cvmx_usbcx_gintmsk, nptxfempmsk, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1312 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1313 | } |
| 1314 | |
| 1315 | |
| 1316 | /** |
| 1317 | * Fill the TX FIFO with an outgoing packet |
| 1318 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1319 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1320 | * @channel: Channel number to get packet from |
| 1321 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1322 | static void cvmx_usb_fill_tx_fifo(struct cvmx_usb_state *usb, int channel) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1323 | { |
| 1324 | union cvmx_usbcx_hccharx hcchar; |
| 1325 | union cvmx_usbcx_hcspltx usbc_hcsplt; |
| 1326 | union cvmx_usbcx_hctsizx usbc_hctsiz; |
| 1327 | struct cvmx_usb_tx_fifo *fifo; |
| 1328 | |
| 1329 | /* We only need to fill data on outbound channels */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1330 | hcchar.u32 = cvmx_usb_read_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1331 | CVMX_USBCX_HCCHARX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1332 | if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT) |
| 1333 | return; |
| 1334 | |
| 1335 | /* OUT Splits only have data on the start and not the complete */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1336 | usbc_hcsplt.u32 = cvmx_usb_read_csr32(usb, |
| 1337 | CVMX_USBCX_HCSPLTX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1338 | if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt) |
| 1339 | return; |
| 1340 | |
| 1341 | /* |
| 1342 | * Find out how many bytes we need to fill and convert it into 32bit |
| 1343 | * words. |
| 1344 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1345 | usbc_hctsiz.u32 = cvmx_usb_read_csr32(usb, |
| 1346 | CVMX_USBCX_HCTSIZX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1347 | if (!usbc_hctsiz.s.xfersize) |
| 1348 | return; |
| 1349 | |
| 1350 | if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) || |
| 1351 | (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS)) |
| 1352 | fifo = &usb->periodic; |
| 1353 | else |
| 1354 | fifo = &usb->nonperiodic; |
| 1355 | |
| 1356 | fifo->entry[fifo->head].channel = channel; |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 1357 | fifo->entry[fifo->head].address = |
| 1358 | cvmx_read64_uint64(CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + |
| 1359 | channel * 8); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1360 | fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2; |
| 1361 | fifo->head++; |
| 1362 | if (fifo->head > MAX_CHANNELS) |
| 1363 | fifo->head = 0; |
| 1364 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1365 | cvmx_usb_poll_tx_fifo(usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1366 | } |
| 1367 | |
| 1368 | /** |
| 1369 | * Perform channel specific setup for Control transactions. All |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1370 | * the generic stuff will already have been done in cvmx_usb_start_channel(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1371 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1372 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1373 | * @channel: Channel to setup |
| 1374 | * @pipe: Pipe for control transaction |
| 1375 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1376 | static void cvmx_usb_start_channel_control(struct cvmx_usb_state *usb, |
| 1377 | int channel, |
| 1378 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1379 | { |
Aaro Koskinen | ba0b8e4 | 2014-11-07 23:43:34 +0200 | [diff] [blame] | 1380 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 1381 | struct usb_hcd *hcd = octeon_to_hcd(priv); |
| 1382 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1383 | struct cvmx_usb_transaction *transaction = |
| 1384 | list_first_entry(&pipe->transactions, typeof(*transaction), |
| 1385 | node); |
Aaro Koskinen | e301dfb | 2014-08-31 23:43:50 +0300 | [diff] [blame] | 1386 | struct usb_ctrlrequest *header = |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1387 | cvmx_phys_to_ptr(transaction->control_header); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1388 | int bytes_to_transfer = transaction->buffer_length - |
| 1389 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1390 | int packets_to_transfer; |
| 1391 | union cvmx_usbcx_hctsizx usbc_hctsiz; |
| 1392 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1393 | usbc_hctsiz.u32 = cvmx_usb_read_csr32(usb, |
| 1394 | CVMX_USBCX_HCTSIZX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1395 | |
| 1396 | switch (transaction->stage) { |
| 1397 | case CVMX_USB_STAGE_NON_CONTROL: |
| 1398 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: |
Aaro Koskinen | ba0b8e4 | 2014-11-07 23:43:34 +0200 | [diff] [blame] | 1399 | dev_err(dev, "%s: ERROR - Non control stage\n", __func__); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1400 | break; |
| 1401 | case CVMX_USB_STAGE_SETUP: |
| 1402 | usbc_hctsiz.s.pid = 3; /* Setup */ |
| 1403 | bytes_to_transfer = sizeof(*header); |
| 1404 | /* All Control operations start with a setup going OUT */ |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1405 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1406 | cvmx_usbcx_hccharx, epdir, |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1407 | CVMX_USB_DIRECTION_OUT); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1408 | /* |
| 1409 | * Setup send the control header instead of the buffer data. The |
| 1410 | * buffer data will be used in the next stage |
| 1411 | */ |
Aaro Koskinen | c4bdbdd | 2015-03-22 17:37:46 +0200 | [diff] [blame] | 1412 | cvmx_write64_uint64(CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + |
| 1413 | channel * 8, |
| 1414 | transaction->control_header); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1415 | break; |
| 1416 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: |
| 1417 | usbc_hctsiz.s.pid = 3; /* Setup */ |
| 1418 | bytes_to_transfer = 0; |
| 1419 | /* All Control operations start with a setup going OUT */ |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1420 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1421 | cvmx_usbcx_hccharx, epdir, |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1422 | CVMX_USB_DIRECTION_OUT); |
| 1423 | |
| 1424 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1425 | cvmx_usbcx_hcspltx, compsplt, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1426 | break; |
| 1427 | case CVMX_USB_STAGE_DATA: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1428 | usbc_hctsiz.s.pid = cvmx_usb_get_data_pid(pipe); |
| 1429 | if (cvmx_usb_pipe_needs_split(usb, pipe)) { |
Aaro Koskinen | 96ee2cc | 2014-08-31 23:43:51 +0300 | [diff] [blame] | 1430 | if (header->bRequestType & USB_DIR_IN) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1431 | bytes_to_transfer = 0; |
| 1432 | else if (bytes_to_transfer > pipe->max_packet) |
| 1433 | bytes_to_transfer = pipe->max_packet; |
| 1434 | } |
| 1435 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1436 | cvmx_usbcx_hccharx, epdir, |
Aaro Koskinen | 96ee2cc | 2014-08-31 23:43:51 +0300 | [diff] [blame] | 1437 | ((header->bRequestType & USB_DIR_IN) ? |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1438 | CVMX_USB_DIRECTION_IN : |
| 1439 | CVMX_USB_DIRECTION_OUT)); |
| 1440 | break; |
| 1441 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1442 | usbc_hctsiz.s.pid = cvmx_usb_get_data_pid(pipe); |
Aaro Koskinen | 96ee2cc | 2014-08-31 23:43:51 +0300 | [diff] [blame] | 1443 | if (!(header->bRequestType & USB_DIR_IN)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1444 | bytes_to_transfer = 0; |
| 1445 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1446 | cvmx_usbcx_hccharx, epdir, |
Aaro Koskinen | 96ee2cc | 2014-08-31 23:43:51 +0300 | [diff] [blame] | 1447 | ((header->bRequestType & USB_DIR_IN) ? |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1448 | CVMX_USB_DIRECTION_IN : |
| 1449 | CVMX_USB_DIRECTION_OUT)); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1450 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1451 | cvmx_usbcx_hcspltx, compsplt, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1452 | break; |
| 1453 | case CVMX_USB_STAGE_STATUS: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1454 | usbc_hctsiz.s.pid = cvmx_usb_get_data_pid(pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1455 | bytes_to_transfer = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1456 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1457 | cvmx_usbcx_hccharx, epdir, |
Aaro Koskinen | 96ee2cc | 2014-08-31 23:43:51 +0300 | [diff] [blame] | 1458 | ((header->bRequestType & USB_DIR_IN) ? |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1459 | CVMX_USB_DIRECTION_OUT : |
| 1460 | CVMX_USB_DIRECTION_IN)); |
| 1461 | break; |
| 1462 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1463 | usbc_hctsiz.s.pid = cvmx_usb_get_data_pid(pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1464 | bytes_to_transfer = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1465 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1466 | cvmx_usbcx_hccharx, epdir, |
Aaro Koskinen | 96ee2cc | 2014-08-31 23:43:51 +0300 | [diff] [blame] | 1467 | ((header->bRequestType & USB_DIR_IN) ? |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1468 | CVMX_USB_DIRECTION_OUT : |
| 1469 | CVMX_USB_DIRECTION_IN)); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1470 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1471 | cvmx_usbcx_hcspltx, compsplt, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1472 | break; |
| 1473 | } |
| 1474 | |
| 1475 | /* |
| 1476 | * Make sure the transfer never exceeds the byte limit of the hardware. |
| 1477 | * Further bytes will be sent as continued transactions |
| 1478 | */ |
| 1479 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { |
| 1480 | /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */ |
| 1481 | bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; |
| 1482 | bytes_to_transfer *= pipe->max_packet; |
| 1483 | } |
| 1484 | |
| 1485 | /* |
| 1486 | * Calculate the number of packets to transfer. If the length is zero |
| 1487 | * we still need to transfer one packet |
| 1488 | */ |
Tapasweni Pathak | dea7503a | 2014-10-08 22:56:57 +0530 | [diff] [blame] | 1489 | packets_to_transfer = DIV_ROUND_UP(bytes_to_transfer, |
| 1490 | pipe->max_packet); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1491 | if (packets_to_transfer == 0) |
| 1492 | packets_to_transfer = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1493 | else if ((packets_to_transfer > 1) && |
| 1494 | (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1495 | /* |
| 1496 | * Limit to one packet when not using DMA. Channels must be |
| 1497 | * restarted between every packet for IN transactions, so there |
| 1498 | * is no reason to do multiple packets in a row |
| 1499 | */ |
| 1500 | packets_to_transfer = 1; |
| 1501 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; |
| 1502 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { |
| 1503 | /* |
| 1504 | * Limit the number of packet and data transferred to what the |
| 1505 | * hardware can handle |
| 1506 | */ |
| 1507 | packets_to_transfer = MAX_TRANSFER_PACKETS; |
| 1508 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; |
| 1509 | } |
| 1510 | |
| 1511 | usbc_hctsiz.s.xfersize = bytes_to_transfer; |
| 1512 | usbc_hctsiz.s.pktcnt = packets_to_transfer; |
| 1513 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1514 | cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), |
| 1515 | usbc_hctsiz.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1516 | } |
| 1517 | |
| 1518 | |
| 1519 | /** |
| 1520 | * Start a channel to perform the pipe's head transaction |
| 1521 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1522 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1523 | * @channel: Channel to setup |
| 1524 | * @pipe: Pipe to start |
| 1525 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1526 | static void cvmx_usb_start_channel(struct cvmx_usb_state *usb, int channel, |
| 1527 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1528 | { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1529 | struct cvmx_usb_transaction *transaction = |
| 1530 | list_first_entry(&pipe->transactions, typeof(*transaction), |
| 1531 | node); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1532 | |
| 1533 | /* Make sure all writes to the DMA region get flushed */ |
| 1534 | CVMX_SYNCW; |
| 1535 | |
| 1536 | /* Attach the channel to the pipe */ |
| 1537 | usb->pipe_for_channel[channel] = pipe; |
| 1538 | pipe->channel = channel; |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 1539 | pipe->flags |= CVMX_USB_PIPE_FLAGS_SCHEDULED; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1540 | |
| 1541 | /* Mark this channel as in use */ |
| 1542 | usb->idle_hardware_channels &= ~(1<<channel); |
| 1543 | |
| 1544 | /* Enable the channel interrupt bits */ |
| 1545 | { |
| 1546 | union cvmx_usbcx_hcintx usbc_hcint; |
| 1547 | union cvmx_usbcx_hcintmskx usbc_hcintmsk; |
| 1548 | union cvmx_usbcx_haintmsk usbc_haintmsk; |
| 1549 | |
| 1550 | /* Clear all channel status bits */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1551 | usbc_hcint.u32 = cvmx_usb_read_csr32(usb, |
| 1552 | CVMX_USBCX_HCINTX(channel, usb->index)); |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1553 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1554 | cvmx_usb_write_csr32(usb, |
| 1555 | CVMX_USBCX_HCINTX(channel, usb->index), |
| 1556 | usbc_hcint.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1557 | |
| 1558 | usbc_hcintmsk.u32 = 0; |
| 1559 | usbc_hcintmsk.s.chhltdmsk = 1; |
| 1560 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { |
| 1561 | /* |
| 1562 | * Channels need these extra interrupts when we aren't |
| 1563 | * in DMA mode. |
| 1564 | */ |
| 1565 | usbc_hcintmsk.s.datatglerrmsk = 1; |
| 1566 | usbc_hcintmsk.s.frmovrunmsk = 1; |
| 1567 | usbc_hcintmsk.s.bblerrmsk = 1; |
| 1568 | usbc_hcintmsk.s.xacterrmsk = 1; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1569 | if (cvmx_usb_pipe_needs_split(usb, pipe)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1570 | /* |
| 1571 | * Splits don't generate xfercompl, so we need |
| 1572 | * ACK and NYET. |
| 1573 | */ |
| 1574 | usbc_hcintmsk.s.nyetmsk = 1; |
| 1575 | usbc_hcintmsk.s.ackmsk = 1; |
| 1576 | } |
| 1577 | usbc_hcintmsk.s.nakmsk = 1; |
| 1578 | usbc_hcintmsk.s.stallmsk = 1; |
| 1579 | usbc_hcintmsk.s.xfercomplmsk = 1; |
| 1580 | } |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1581 | cvmx_usb_write_csr32(usb, |
Aleh Suprunovich | 9109fcf | 2014-10-07 14:52:52 +0300 | [diff] [blame] | 1582 | CVMX_USBCX_HCINTMSKX(channel, usb->index), |
| 1583 | usbc_hcintmsk.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1584 | |
| 1585 | /* Enable the channel interrupt to propagate */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1586 | usbc_haintmsk.u32 = cvmx_usb_read_csr32(usb, |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1587 | CVMX_USBCX_HAINTMSK(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1588 | usbc_haintmsk.s.haintmsk |= 1<<channel; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1589 | cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), |
| 1590 | usbc_haintmsk.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1591 | } |
| 1592 | |
Aaro Koskinen | d712648 | 2015-03-22 17:37:51 +0200 | [diff] [blame] | 1593 | /* Setup the location the DMA engine uses. */ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1594 | { |
Aaro Koskinen | d712648 | 2015-03-22 17:37:51 +0200 | [diff] [blame] | 1595 | uint64_t reg; |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1596 | uint64_t dma_address = transaction->buffer + |
| 1597 | transaction->actual_bytes; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 1598 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1599 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1600 | dma_address = transaction->buffer + |
| 1601 | transaction->iso_packets[0].offset + |
| 1602 | transaction->actual_bytes; |
| 1603 | |
Aaro Koskinen | d712648 | 2015-03-22 17:37:51 +0200 | [diff] [blame] | 1604 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) |
| 1605 | reg = CVMX_USBNX_DMA0_OUTB_CHN0(usb->index); |
| 1606 | else |
| 1607 | reg = CVMX_USBNX_DMA0_INB_CHN0(usb->index); |
| 1608 | cvmx_write64_uint64(reg + channel * 8, dma_address); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1609 | } |
| 1610 | |
| 1611 | /* Setup both the size of the transfer and the SPLIT characteristics */ |
| 1612 | { |
| 1613 | union cvmx_usbcx_hcspltx usbc_hcsplt = {.u32 = 0}; |
| 1614 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = 0}; |
| 1615 | int packets_to_transfer; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1616 | int bytes_to_transfer = transaction->buffer_length - |
| 1617 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1618 | |
| 1619 | /* |
| 1620 | * ISOCHRONOUS transactions store each individual transfer size |
| 1621 | * in the packet structure, not the global buffer_length |
| 1622 | */ |
| 1623 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1624 | bytes_to_transfer = |
| 1625 | transaction->iso_packets[0].length - |
| 1626 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1627 | |
| 1628 | /* |
| 1629 | * We need to do split transactions when we are talking to non |
| 1630 | * high speed devices that are behind a high speed hub |
| 1631 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1632 | if (cvmx_usb_pipe_needs_split(usb, pipe)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1633 | /* |
| 1634 | * On the start split phase (stage is even) record the |
| 1635 | * frame number we will need to send the split complete. |
| 1636 | * We only store the lower two bits since the time ahead |
| 1637 | * can only be two frames |
| 1638 | */ |
| 1639 | if ((transaction->stage&1) == 0) { |
| 1640 | if (transaction->type == CVMX_USB_TRANSFER_BULK) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1641 | pipe->split_sc_frame = |
| 1642 | (usb->frame_number + 1) & 0x7f; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1643 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1644 | pipe->split_sc_frame = |
| 1645 | (usb->frame_number + 2) & 0x7f; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1646 | } else |
| 1647 | pipe->split_sc_frame = -1; |
| 1648 | |
| 1649 | usbc_hcsplt.s.spltena = 1; |
| 1650 | usbc_hcsplt.s.hubaddr = pipe->hub_device_addr; |
| 1651 | usbc_hcsplt.s.prtaddr = pipe->hub_port; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1652 | usbc_hcsplt.s.compsplt = (transaction->stage == |
| 1653 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1654 | |
| 1655 | /* |
| 1656 | * SPLIT transactions can only ever transmit one data |
| 1657 | * packet so limit the transfer size to the max packet |
| 1658 | * size |
| 1659 | */ |
| 1660 | if (bytes_to_transfer > pipe->max_packet) |
| 1661 | bytes_to_transfer = pipe->max_packet; |
| 1662 | |
| 1663 | /* |
| 1664 | * ISOCHRONOUS OUT splits are unique in that they limit |
| 1665 | * data transfers to 188 byte chunks representing the |
| 1666 | * begin/middle/end of the data or all |
| 1667 | */ |
| 1668 | if (!usbc_hcsplt.s.compsplt && |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1669 | (pipe->transfer_dir == |
| 1670 | CVMX_USB_DIRECTION_OUT) && |
| 1671 | (pipe->transfer_type == |
| 1672 | CVMX_USB_TRANSFER_ISOCHRONOUS)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1673 | /* |
| 1674 | * Clear the split complete frame number as |
| 1675 | * there isn't going to be a split complete |
| 1676 | */ |
| 1677 | pipe->split_sc_frame = -1; |
| 1678 | /* |
| 1679 | * See if we've started this transfer and sent |
| 1680 | * data |
| 1681 | */ |
| 1682 | if (transaction->actual_bytes == 0) { |
| 1683 | /* |
| 1684 | * Nothing sent yet, this is either a |
| 1685 | * begin or the entire payload |
| 1686 | */ |
| 1687 | if (bytes_to_transfer <= 188) |
| 1688 | /* Entire payload in one go */ |
| 1689 | usbc_hcsplt.s.xactpos = 3; |
| 1690 | else |
| 1691 | /* First part of payload */ |
| 1692 | usbc_hcsplt.s.xactpos = 2; |
| 1693 | } else { |
| 1694 | /* |
| 1695 | * Continuing the previous data, we must |
| 1696 | * either be in the middle or at the end |
| 1697 | */ |
| 1698 | if (bytes_to_transfer <= 188) |
| 1699 | /* End of payload */ |
| 1700 | usbc_hcsplt.s.xactpos = 1; |
| 1701 | else |
| 1702 | /* Middle of payload */ |
| 1703 | usbc_hcsplt.s.xactpos = 0; |
| 1704 | } |
| 1705 | /* |
| 1706 | * Again, the transfer size is limited to 188 |
| 1707 | * bytes |
| 1708 | */ |
| 1709 | if (bytes_to_transfer > 188) |
| 1710 | bytes_to_transfer = 188; |
| 1711 | } |
| 1712 | } |
| 1713 | |
| 1714 | /* |
| 1715 | * Make sure the transfer never exceeds the byte limit of the |
| 1716 | * hardware. Further bytes will be sent as continued |
| 1717 | * transactions |
| 1718 | */ |
| 1719 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { |
| 1720 | /* |
| 1721 | * Round MAX_TRANSFER_BYTES to a multiple of out packet |
| 1722 | * size |
| 1723 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1724 | bytes_to_transfer = MAX_TRANSFER_BYTES / |
| 1725 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1726 | bytes_to_transfer *= pipe->max_packet; |
| 1727 | } |
| 1728 | |
| 1729 | /* |
| 1730 | * Calculate the number of packets to transfer. If the length is |
| 1731 | * zero we still need to transfer one packet |
| 1732 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1733 | packets_to_transfer = |
Tapasweni Pathak | dea7503a | 2014-10-08 22:56:57 +0530 | [diff] [blame] | 1734 | DIV_ROUND_UP(bytes_to_transfer, pipe->max_packet); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1735 | if (packets_to_transfer == 0) |
| 1736 | packets_to_transfer = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1737 | else if ((packets_to_transfer > 1) && |
| 1738 | (usb->init_flags & |
| 1739 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1740 | /* |
| 1741 | * Limit to one packet when not using DMA. Channels must |
| 1742 | * be restarted between every packet for IN |
| 1743 | * transactions, so there is no reason to do multiple |
| 1744 | * packets in a row |
| 1745 | */ |
| 1746 | packets_to_transfer = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1747 | bytes_to_transfer = packets_to_transfer * |
| 1748 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1749 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { |
| 1750 | /* |
| 1751 | * Limit the number of packet and data transferred to |
| 1752 | * what the hardware can handle |
| 1753 | */ |
| 1754 | packets_to_transfer = MAX_TRANSFER_PACKETS; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1755 | bytes_to_transfer = packets_to_transfer * |
| 1756 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1757 | } |
| 1758 | |
| 1759 | usbc_hctsiz.s.xfersize = bytes_to_transfer; |
| 1760 | usbc_hctsiz.s.pktcnt = packets_to_transfer; |
| 1761 | |
| 1762 | /* Update the DATA0/DATA1 toggle */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1763 | usbc_hctsiz.s.pid = cvmx_usb_get_data_pid(pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1764 | /* |
| 1765 | * High speed pipes may need a hardware ping before they start |
| 1766 | */ |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 1767 | if (pipe->flags & CVMX_USB_PIPE_FLAGS_NEED_PING) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1768 | usbc_hctsiz.s.dopng = 1; |
| 1769 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1770 | cvmx_usb_write_csr32(usb, |
| 1771 | CVMX_USBCX_HCSPLTX(channel, usb->index), |
| 1772 | usbc_hcsplt.u32); |
| 1773 | cvmx_usb_write_csr32(usb, |
| 1774 | CVMX_USBCX_HCTSIZX(channel, usb->index), |
| 1775 | usbc_hctsiz.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1776 | } |
| 1777 | |
| 1778 | /* Setup the Host Channel Characteristics Register */ |
| 1779 | { |
| 1780 | union cvmx_usbcx_hccharx usbc_hcchar = {.u32 = 0}; |
| 1781 | |
| 1782 | /* |
| 1783 | * Set the startframe odd/even properly. This is only used for |
| 1784 | * periodic |
| 1785 | */ |
| 1786 | usbc_hcchar.s.oddfrm = usb->frame_number&1; |
| 1787 | |
| 1788 | /* |
| 1789 | * Set the number of back to back packets allowed by this |
| 1790 | * endpoint. Split transactions interpret "ec" as the number of |
| 1791 | * immediate retries of failure. These retries happen too |
| 1792 | * quickly, so we disable these entirely for splits |
| 1793 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1794 | if (cvmx_usb_pipe_needs_split(usb, pipe)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1795 | usbc_hcchar.s.ec = 1; |
| 1796 | else if (pipe->multi_count < 1) |
| 1797 | usbc_hcchar.s.ec = 1; |
| 1798 | else if (pipe->multi_count > 3) |
| 1799 | usbc_hcchar.s.ec = 3; |
| 1800 | else |
| 1801 | usbc_hcchar.s.ec = pipe->multi_count; |
| 1802 | |
| 1803 | /* Set the rest of the endpoint specific settings */ |
| 1804 | usbc_hcchar.s.devaddr = pipe->device_addr; |
| 1805 | usbc_hcchar.s.eptype = transaction->type; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1806 | usbc_hcchar.s.lspddev = |
| 1807 | (pipe->device_speed == CVMX_USB_SPEED_LOW); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1808 | usbc_hcchar.s.epdir = pipe->transfer_dir; |
| 1809 | usbc_hcchar.s.epnum = pipe->endpoint_num; |
| 1810 | usbc_hcchar.s.mps = pipe->max_packet; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1811 | cvmx_usb_write_csr32(usb, |
| 1812 | CVMX_USBCX_HCCHARX(channel, usb->index), |
| 1813 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1814 | } |
| 1815 | |
| 1816 | /* Do transaction type specific fixups as needed */ |
| 1817 | switch (transaction->type) { |
| 1818 | case CVMX_USB_TRANSFER_CONTROL: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1819 | cvmx_usb_start_channel_control(usb, channel, pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1820 | break; |
| 1821 | case CVMX_USB_TRANSFER_BULK: |
| 1822 | case CVMX_USB_TRANSFER_INTERRUPT: |
| 1823 | break; |
| 1824 | case CVMX_USB_TRANSFER_ISOCHRONOUS: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1825 | if (!cvmx_usb_pipe_needs_split(usb, pipe)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1826 | /* |
| 1827 | * ISO transactions require different PIDs depending on |
| 1828 | * direction and how many packets are needed |
| 1829 | */ |
| 1830 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) { |
| 1831 | if (pipe->multi_count < 2) /* Need DATA0 */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1832 | USB_SET_FIELD32( |
| 1833 | CVMX_USBCX_HCTSIZX(channel, |
| 1834 | usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1835 | cvmx_usbcx_hctsizx, pid, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1836 | else /* Need MDATA */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1837 | USB_SET_FIELD32( |
| 1838 | CVMX_USBCX_HCTSIZX(channel, |
| 1839 | usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1840 | cvmx_usbcx_hctsizx, pid, 3); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1841 | } |
| 1842 | } |
| 1843 | break; |
| 1844 | } |
| 1845 | { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1846 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1847 | cvmx_usb_read_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1848 | CVMX_USBCX_HCTSIZX(channel, usb->index))}; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1849 | transaction->xfersize = usbc_hctsiz.s.xfersize; |
| 1850 | transaction->pktcnt = usbc_hctsiz.s.pktcnt; |
| 1851 | } |
Carlos E. Garcia | 69e98df | 2015-04-24 09:40:42 -0400 | [diff] [blame] | 1852 | /* Remember when we start a split transaction */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1853 | if (cvmx_usb_pipe_needs_split(usb, pipe)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1854 | usb->active_split = transaction; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1855 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1856 | cvmx_usbcx_hccharx, chena, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1857 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1858 | cvmx_usb_fill_tx_fifo(usb, channel); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1859 | } |
| 1860 | |
| 1861 | |
| 1862 | /** |
| 1863 | * Find a pipe that is ready to be scheduled to hardware. |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1864 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1865 | * @list: Pipe list to search |
| 1866 | * @current_frame: |
| 1867 | * Frame counter to use as a time reference. |
| 1868 | * |
| 1869 | * Returns: Pipe or NULL if none are ready |
| 1870 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1871 | static struct cvmx_usb_pipe *cvmx_usb_find_ready_pipe( |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1872 | struct cvmx_usb_state *usb, |
| 1873 | struct list_head *list, |
| 1874 | uint64_t current_frame) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1875 | { |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 1876 | struct cvmx_usb_pipe *pipe; |
| 1877 | |
| 1878 | list_for_each_entry(pipe, list, node) { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1879 | struct cvmx_usb_transaction *t = |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1880 | list_first_entry(&pipe->transactions, typeof(*t), |
| 1881 | node); |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 1882 | if (!(pipe->flags & CVMX_USB_PIPE_FLAGS_SCHEDULED) && t && |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1883 | (pipe->next_tx_frame <= current_frame) && |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1884 | ((pipe->split_sc_frame == -1) || |
| 1885 | ((((int)current_frame - (int)pipe->split_sc_frame) |
| 1886 | & 0x7f) < 0x40)) && |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1887 | (!usb->active_split || (usb->active_split == t))) { |
Aaro Koskinen | 20f6b82 | 2014-05-11 14:15:20 +0300 | [diff] [blame] | 1888 | prefetch(t); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1889 | return pipe; |
| 1890 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1891 | } |
| 1892 | return NULL; |
| 1893 | } |
| 1894 | |
| 1895 | |
| 1896 | /** |
| 1897 | * Called whenever a pipe might need to be scheduled to the |
| 1898 | * hardware. |
| 1899 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1900 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1901 | * @is_sof: True if this schedule was called on a SOF interrupt. |
| 1902 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1903 | static void cvmx_usb_schedule(struct cvmx_usb_state *usb, int is_sof) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1904 | { |
| 1905 | int channel; |
| 1906 | struct cvmx_usb_pipe *pipe; |
| 1907 | int need_sof; |
| 1908 | enum cvmx_usb_transfer ttype; |
| 1909 | |
| 1910 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { |
| 1911 | /* |
| 1912 | * Without DMA we need to be careful to not schedule something |
| 1913 | * at the end of a frame and cause an overrun. |
| 1914 | */ |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1915 | union cvmx_usbcx_hfnum hfnum = { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1916 | .u32 = cvmx_usb_read_csr32(usb, |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1917 | CVMX_USBCX_HFNUM(usb->index)) |
| 1918 | }; |
| 1919 | |
| 1920 | union cvmx_usbcx_hfir hfir = { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1921 | .u32 = cvmx_usb_read_csr32(usb, |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 1922 | CVMX_USBCX_HFIR(usb->index)) |
| 1923 | }; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 1924 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1925 | if (hfnum.s.frrem < hfir.s.frint/4) |
| 1926 | goto done; |
| 1927 | } |
| 1928 | |
| 1929 | while (usb->idle_hardware_channels) { |
| 1930 | /* Find an idle channel */ |
| 1931 | channel = __fls(usb->idle_hardware_channels); |
| 1932 | if (unlikely(channel > 7)) |
| 1933 | break; |
| 1934 | |
| 1935 | /* Find a pipe needing service */ |
| 1936 | pipe = NULL; |
| 1937 | if (is_sof) { |
| 1938 | /* |
| 1939 | * Only process periodic pipes on SOF interrupts. This |
| 1940 | * way we are sure that the periodic data is sent in the |
| 1941 | * beginning of the frame |
| 1942 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1943 | pipe = cvmx_usb_find_ready_pipe(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1944 | usb->active_pipes + |
| 1945 | CVMX_USB_TRANSFER_ISOCHRONOUS, |
| 1946 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1947 | if (likely(!pipe)) |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1948 | pipe = cvmx_usb_find_ready_pipe(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1949 | usb->active_pipes + |
| 1950 | CVMX_USB_TRANSFER_INTERRUPT, |
| 1951 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1952 | } |
| 1953 | if (likely(!pipe)) { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1954 | pipe = cvmx_usb_find_ready_pipe(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1955 | usb->active_pipes + |
| 1956 | CVMX_USB_TRANSFER_CONTROL, |
| 1957 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1958 | if (likely(!pipe)) |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1959 | pipe = cvmx_usb_find_ready_pipe(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1960 | usb->active_pipes + |
| 1961 | CVMX_USB_TRANSFER_BULK, |
| 1962 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1963 | } |
| 1964 | if (!pipe) |
| 1965 | break; |
| 1966 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 1967 | cvmx_usb_start_channel(usb, channel, pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1968 | } |
| 1969 | |
| 1970 | done: |
| 1971 | /* |
| 1972 | * Only enable SOF interrupts when we have transactions pending in the |
| 1973 | * future that might need to be scheduled |
| 1974 | */ |
| 1975 | need_sof = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1976 | for (ttype = CVMX_USB_TRANSFER_CONTROL; |
| 1977 | ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) { |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 1978 | list_for_each_entry(pipe, &usb->active_pipes[ttype], node) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1979 | if (pipe->next_tx_frame > usb->frame_number) { |
| 1980 | need_sof = 1; |
| 1981 | break; |
| 1982 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1983 | } |
| 1984 | } |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1985 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 1986 | cvmx_usbcx_gintmsk, sofmsk, need_sof); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1987 | } |
| 1988 | |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 1989 | static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb, |
| 1990 | enum cvmx_usb_complete status, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1991 | struct cvmx_usb_pipe *pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 1992 | struct cvmx_usb_transaction |
| 1993 | *transaction, |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 1994 | int bytes_transferred, |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 1995 | struct urb *urb) |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 1996 | { |
| 1997 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 1998 | struct usb_hcd *hcd = octeon_to_hcd(priv); |
| 1999 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2000 | |
Aaro Koskinen | 8dcf4ec | 2014-06-29 22:52:55 +0300 | [diff] [blame] | 2001 | if (likely(status == CVMX_USB_COMPLETE_SUCCESS)) |
| 2002 | urb->actual_length = bytes_transferred; |
| 2003 | else |
| 2004 | urb->actual_length = 0; |
| 2005 | |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2006 | urb->hcpriv = NULL; |
| 2007 | |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2008 | /* For Isochronous transactions we need to update the URB packet status |
| 2009 | list from data in our private copy */ |
| 2010 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
| 2011 | int i; |
| 2012 | /* |
| 2013 | * The pointer to the private list is stored in the setup_packet |
| 2014 | * field. |
| 2015 | */ |
| 2016 | struct cvmx_usb_iso_packet *iso_packet = |
| 2017 | (struct cvmx_usb_iso_packet *) urb->setup_packet; |
| 2018 | /* Recalculate the transfer size by adding up each packet */ |
| 2019 | urb->actual_length = 0; |
| 2020 | for (i = 0; i < urb->number_of_packets; i++) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2021 | if (iso_packet[i].status == |
| 2022 | CVMX_USB_COMPLETE_SUCCESS) { |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2023 | urb->iso_frame_desc[i].status = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2024 | urb->iso_frame_desc[i].actual_length = |
| 2025 | iso_packet[i].length; |
| 2026 | urb->actual_length += |
| 2027 | urb->iso_frame_desc[i].actual_length; |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2028 | } else { |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2029 | dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%p transaction=%p size=%d\n", |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2030 | i, urb->number_of_packets, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2031 | iso_packet[i].status, pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2032 | transaction, iso_packet[i].length); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2033 | urb->iso_frame_desc[i].status = -EREMOTEIO; |
| 2034 | } |
| 2035 | } |
| 2036 | /* Free the private list now that we don't need it anymore */ |
| 2037 | kfree(iso_packet); |
| 2038 | urb->setup_packet = NULL; |
| 2039 | } |
| 2040 | |
| 2041 | switch (status) { |
| 2042 | case CVMX_USB_COMPLETE_SUCCESS: |
| 2043 | urb->status = 0; |
| 2044 | break; |
| 2045 | case CVMX_USB_COMPLETE_CANCEL: |
| 2046 | if (urb->status == 0) |
| 2047 | urb->status = -ENOENT; |
| 2048 | break; |
| 2049 | case CVMX_USB_COMPLETE_STALL: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2050 | dev_dbg(dev, "status=stall pipe=%p transaction=%p size=%d\n", |
| 2051 | pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2052 | urb->status = -EPIPE; |
| 2053 | break; |
| 2054 | case CVMX_USB_COMPLETE_BABBLEERR: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2055 | dev_dbg(dev, "status=babble pipe=%p transaction=%p size=%d\n", |
| 2056 | pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2057 | urb->status = -EPIPE; |
| 2058 | break; |
| 2059 | case CVMX_USB_COMPLETE_SHORT: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2060 | dev_dbg(dev, "status=short pipe=%p transaction=%p size=%d\n", |
| 2061 | pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2062 | urb->status = -EREMOTEIO; |
| 2063 | break; |
| 2064 | case CVMX_USB_COMPLETE_ERROR: |
| 2065 | case CVMX_USB_COMPLETE_XACTERR: |
| 2066 | case CVMX_USB_COMPLETE_DATATGLERR: |
| 2067 | case CVMX_USB_COMPLETE_FRAMEERR: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2068 | dev_dbg(dev, "status=%d pipe=%p transaction=%p size=%d\n", |
| 2069 | status, pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2070 | urb->status = -EPROTO; |
| 2071 | break; |
| 2072 | } |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 2073 | usb_hcd_unlink_urb_from_ep(octeon_to_hcd(priv), urb); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2074 | spin_unlock(&priv->lock); |
| 2075 | usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status); |
| 2076 | spin_lock(&priv->lock); |
| 2077 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2078 | |
| 2079 | /** |
| 2080 | * Signal the completion of a transaction and free it. The |
| 2081 | * transaction will be removed from the pipe transaction list. |
| 2082 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2083 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2084 | * @pipe: Pipe the transaction is on |
| 2085 | * @transaction: |
| 2086 | * Transaction that completed |
| 2087 | * @complete_code: |
| 2088 | * Completion code |
| 2089 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2090 | static void cvmx_usb_perform_complete(struct cvmx_usb_state *usb, |
| 2091 | struct cvmx_usb_pipe *pipe, |
| 2092 | struct cvmx_usb_transaction *transaction, |
| 2093 | enum cvmx_usb_complete complete_code) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2094 | { |
| 2095 | /* If this was a split then clear our split in progress marker */ |
| 2096 | if (usb->active_split == transaction) |
| 2097 | usb->active_split = NULL; |
| 2098 | |
| 2099 | /* |
| 2100 | * Isochronous transactions need extra processing as they might not be |
| 2101 | * done after a single data transfer |
| 2102 | */ |
| 2103 | if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) { |
| 2104 | /* Update the number of bytes transferred in this ISO packet */ |
| 2105 | transaction->iso_packets[0].length = transaction->actual_bytes; |
| 2106 | transaction->iso_packets[0].status = complete_code; |
| 2107 | |
| 2108 | /* |
| 2109 | * If there are more ISOs pending and we succeeded, schedule the |
| 2110 | * next one |
| 2111 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2112 | if ((transaction->iso_number_packets > 1) && |
| 2113 | (complete_code == CVMX_USB_COMPLETE_SUCCESS)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2114 | /* No bytes transferred for this packet as of yet */ |
| 2115 | transaction->actual_bytes = 0; |
| 2116 | /* One less ISO waiting to transfer */ |
| 2117 | transaction->iso_number_packets--; |
| 2118 | /* Increment to the next location in our packet array */ |
| 2119 | transaction->iso_packets++; |
| 2120 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; |
Nitin Kuppelur | 15ef0cc | 2014-09-10 03:36:24 +0200 | [diff] [blame] | 2121 | return; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2122 | } |
| 2123 | } |
| 2124 | |
| 2125 | /* Remove the transaction from the pipe list */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2126 | list_del(&transaction->node); |
| 2127 | if (list_empty(&pipe->transactions)) |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 2128 | list_move_tail(&pipe->node, &usb->idle_pipes); |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2129 | octeon_usb_urb_complete_callback(usb, complete_code, pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2130 | transaction, |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2131 | transaction->actual_bytes, |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2132 | transaction->urb); |
Aaro Koskinen | a2dfef0 | 2013-10-10 23:25:31 +0300 | [diff] [blame] | 2133 | kfree(transaction); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2134 | } |
| 2135 | |
| 2136 | |
| 2137 | /** |
| 2138 | * Submit a usb transaction to a pipe. Called for all types |
| 2139 | * of transactions. |
| 2140 | * |
| 2141 | * @usb: |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2142 | * @pipe: Which pipe to submit to. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2143 | * @type: Transaction type |
| 2144 | * @buffer: User buffer for the transaction |
| 2145 | * @buffer_length: |
| 2146 | * User buffer's length in bytes |
| 2147 | * @control_header: |
| 2148 | * For control transactions, the 8 byte standard header |
| 2149 | * @iso_start_frame: |
| 2150 | * For ISO transactions, the start frame |
| 2151 | * @iso_number_packets: |
| 2152 | * For ISO, the number of packet in the transaction. |
| 2153 | * @iso_packets: |
| 2154 | * A description of each ISO packet |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2155 | * @urb: URB for the callback |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2156 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2157 | * Returns: Transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2158 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2159 | static struct cvmx_usb_transaction *cvmx_usb_submit_transaction( |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2160 | struct cvmx_usb_state *usb, |
| 2161 | struct cvmx_usb_pipe *pipe, |
| 2162 | enum cvmx_usb_transfer type, |
| 2163 | uint64_t buffer, |
| 2164 | int buffer_length, |
| 2165 | uint64_t control_header, |
| 2166 | int iso_start_frame, |
| 2167 | int iso_number_packets, |
| 2168 | struct cvmx_usb_iso_packet *iso_packets, |
| 2169 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2170 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2171 | struct cvmx_usb_transaction *transaction; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2172 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2173 | if (unlikely(pipe->transfer_type != type)) |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2174 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2175 | |
Aaro Koskinen | a2dfef0 | 2013-10-10 23:25:31 +0300 | [diff] [blame] | 2176 | transaction = kzalloc(sizeof(*transaction), GFP_ATOMIC); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2177 | if (unlikely(!transaction)) |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2178 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2179 | |
| 2180 | transaction->type = type; |
| 2181 | transaction->buffer = buffer; |
| 2182 | transaction->buffer_length = buffer_length; |
| 2183 | transaction->control_header = control_header; |
| 2184 | /* FIXME: This is not used, implement it. */ |
| 2185 | transaction->iso_start_frame = iso_start_frame; |
| 2186 | transaction->iso_number_packets = iso_number_packets; |
| 2187 | transaction->iso_packets = iso_packets; |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2188 | transaction->urb = urb; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2189 | if (transaction->type == CVMX_USB_TRANSFER_CONTROL) |
| 2190 | transaction->stage = CVMX_USB_STAGE_SETUP; |
| 2191 | else |
| 2192 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; |
| 2193 | |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2194 | if (!list_empty(&pipe->transactions)) { |
| 2195 | list_add_tail(&transaction->node, &pipe->transactions); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2196 | } else { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2197 | list_add_tail(&transaction->node, &pipe->transactions); |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 2198 | list_move_tail(&pipe->node, |
| 2199 | &usb->active_pipes[pipe->transfer_type]); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2200 | |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2201 | /* |
| 2202 | * We may need to schedule the pipe if this was the head of the |
| 2203 | * pipe. |
| 2204 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2205 | cvmx_usb_schedule(usb, 0); |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2206 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2207 | |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2208 | return transaction; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2209 | } |
| 2210 | |
| 2211 | |
| 2212 | /** |
| 2213 | * Call to submit a USB Bulk transfer to a pipe. |
| 2214 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2215 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2216 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 9ccca70 | 2013-10-06 22:22:30 +0300 | [diff] [blame] | 2217 | * @urb: URB. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2218 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2219 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2220 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2221 | static struct cvmx_usb_transaction *cvmx_usb_submit_bulk( |
| 2222 | struct cvmx_usb_state *usb, |
| 2223 | struct cvmx_usb_pipe *pipe, |
| 2224 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2225 | { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2226 | return cvmx_usb_submit_transaction(usb, pipe, CVMX_USB_TRANSFER_BULK, |
| 2227 | urb->transfer_dma, |
| 2228 | urb->transfer_buffer_length, |
| 2229 | 0, /* control_header */ |
| 2230 | 0, /* iso_start_frame */ |
| 2231 | 0, /* iso_number_packets */ |
| 2232 | NULL, /* iso_packets */ |
| 2233 | urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2234 | } |
| 2235 | |
| 2236 | |
| 2237 | /** |
| 2238 | * Call to submit a USB Interrupt transfer to a pipe. |
| 2239 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2240 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2241 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2242 | * @urb: URB returned when the callback is called. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2243 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2244 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2245 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2246 | static struct cvmx_usb_transaction *cvmx_usb_submit_interrupt( |
| 2247 | struct cvmx_usb_state *usb, |
| 2248 | struct cvmx_usb_pipe *pipe, |
| 2249 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2250 | { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2251 | return cvmx_usb_submit_transaction(usb, pipe, |
| 2252 | CVMX_USB_TRANSFER_INTERRUPT, |
| 2253 | urb->transfer_dma, |
| 2254 | urb->transfer_buffer_length, |
| 2255 | 0, /* control_header */ |
| 2256 | 0, /* iso_start_frame */ |
| 2257 | 0, /* iso_number_packets */ |
| 2258 | NULL, /* iso_packets */ |
| 2259 | urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2260 | } |
| 2261 | |
| 2262 | |
| 2263 | /** |
| 2264 | * Call to submit a USB Control transfer to a pipe. |
| 2265 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2266 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2267 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 2ae09e8 | 2013-10-06 22:22:31 +0300 | [diff] [blame] | 2268 | * @urb: URB. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2269 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2270 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2271 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2272 | static struct cvmx_usb_transaction *cvmx_usb_submit_control( |
| 2273 | struct cvmx_usb_state *usb, |
| 2274 | struct cvmx_usb_pipe *pipe, |
| 2275 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2276 | { |
Aaro Koskinen | 2ae09e8 | 2013-10-06 22:22:31 +0300 | [diff] [blame] | 2277 | int buffer_length = urb->transfer_buffer_length; |
| 2278 | uint64_t control_header = urb->setup_dma; |
Aaro Koskinen | e301dfb | 2014-08-31 23:43:50 +0300 | [diff] [blame] | 2279 | struct usb_ctrlrequest *header = cvmx_phys_to_ptr(control_header); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2280 | |
Aaro Koskinen | 96ee2cc | 2014-08-31 23:43:51 +0300 | [diff] [blame] | 2281 | if ((header->bRequestType & USB_DIR_IN) == 0) |
Aaro Koskinen | e301dfb | 2014-08-31 23:43:50 +0300 | [diff] [blame] | 2282 | buffer_length = le16_to_cpu(header->wLength); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2283 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2284 | return cvmx_usb_submit_transaction(usb, pipe, |
| 2285 | CVMX_USB_TRANSFER_CONTROL, |
| 2286 | urb->transfer_dma, buffer_length, |
| 2287 | control_header, |
| 2288 | 0, /* iso_start_frame */ |
| 2289 | 0, /* iso_number_packets */ |
| 2290 | NULL, /* iso_packets */ |
| 2291 | urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2292 | } |
| 2293 | |
| 2294 | |
| 2295 | /** |
| 2296 | * Call to submit a USB Isochronous transfer to a pipe. |
| 2297 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2298 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2299 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2300 | * @urb: URB returned when the callback is called. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2301 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2302 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2303 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2304 | static struct cvmx_usb_transaction *cvmx_usb_submit_isochronous( |
| 2305 | struct cvmx_usb_state *usb, |
| 2306 | struct cvmx_usb_pipe *pipe, |
| 2307 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2308 | { |
Aaro Koskinen | e16b5e3 | 2013-10-06 22:22:33 +0300 | [diff] [blame] | 2309 | struct cvmx_usb_iso_packet *packets; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2310 | |
Aaro Koskinen | e16b5e3 | 2013-10-06 22:22:33 +0300 | [diff] [blame] | 2311 | packets = (struct cvmx_usb_iso_packet *) urb->setup_packet; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2312 | return cvmx_usb_submit_transaction(usb, pipe, |
| 2313 | CVMX_USB_TRANSFER_ISOCHRONOUS, |
| 2314 | urb->transfer_dma, |
| 2315 | urb->transfer_buffer_length, |
| 2316 | 0, /* control_header */ |
| 2317 | urb->start_frame, |
| 2318 | urb->number_of_packets, |
| 2319 | packets, urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2320 | } |
| 2321 | |
| 2322 | |
| 2323 | /** |
| 2324 | * Cancel one outstanding request in a pipe. Canceling a request |
| 2325 | * can fail if the transaction has already completed before cancel |
| 2326 | * is called. Even after a successful cancel call, it may take |
| 2327 | * a frame or two for the cvmx_usb_poll() function to call the |
| 2328 | * associated callback. |
| 2329 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2330 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2331 | * @pipe: Pipe to cancel requests in. |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2332 | * @transaction: Transaction to cancel, returned by the submit function. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2333 | * |
| 2334 | * Returns: 0 or a negative error code. |
| 2335 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2336 | static int cvmx_usb_cancel(struct cvmx_usb_state *usb, |
| 2337 | struct cvmx_usb_pipe *pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2338 | struct cvmx_usb_transaction *transaction) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2339 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2340 | /* |
| 2341 | * If the transaction is the HEAD of the queue and scheduled. We need to |
| 2342 | * treat it special |
| 2343 | */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2344 | if (list_first_entry(&pipe->transactions, typeof(*transaction), node) == |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 2345 | transaction && (pipe->flags & CVMX_USB_PIPE_FLAGS_SCHEDULED)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2346 | union cvmx_usbcx_hccharx usbc_hcchar; |
| 2347 | |
| 2348 | usb->pipe_for_channel[pipe->channel] = NULL; |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 2349 | pipe->flags &= ~CVMX_USB_PIPE_FLAGS_SCHEDULED; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2350 | |
| 2351 | CVMX_SYNCW; |
| 2352 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2353 | usbc_hcchar.u32 = cvmx_usb_read_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2354 | CVMX_USBCX_HCCHARX(pipe->channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2355 | /* |
| 2356 | * If the channel isn't enabled then the transaction already |
| 2357 | * completed. |
| 2358 | */ |
| 2359 | if (usbc_hcchar.s.chena) { |
| 2360 | usbc_hcchar.s.chdis = 1; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2361 | cvmx_usb_write_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2362 | CVMX_USBCX_HCCHARX(pipe->channel, |
| 2363 | usb->index), |
| 2364 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2365 | } |
| 2366 | } |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2367 | cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2368 | CVMX_USB_COMPLETE_CANCEL); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2369 | return 0; |
| 2370 | } |
| 2371 | |
| 2372 | |
| 2373 | /** |
| 2374 | * Cancel all outstanding requests in a pipe. Logically all this |
| 2375 | * does is call cvmx_usb_cancel() in a loop. |
| 2376 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2377 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2378 | * @pipe: Pipe to cancel requests in. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2379 | * |
| 2380 | * Returns: 0 or a negative error code. |
| 2381 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2382 | static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb, |
| 2383 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2384 | { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2385 | struct cvmx_usb_transaction *transaction, *next; |
| 2386 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2387 | /* Simply loop through and attempt to cancel each transaction */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2388 | list_for_each_entry_safe(transaction, next, &pipe->transactions, node) { |
| 2389 | int result = cvmx_usb_cancel(usb, pipe, transaction); |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 2390 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2391 | if (unlikely(result != 0)) |
| 2392 | return result; |
| 2393 | } |
| 2394 | return 0; |
| 2395 | } |
| 2396 | |
| 2397 | |
| 2398 | /** |
| 2399 | * Close a pipe created with cvmx_usb_open_pipe(). |
| 2400 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2401 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2402 | * @pipe: Pipe to close. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2403 | * |
| 2404 | * Returns: 0 or a negative error code. EBUSY is returned if the pipe has |
| 2405 | * outstanding transfers. |
| 2406 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2407 | static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb, |
| 2408 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2409 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2410 | /* Fail if the pipe has pending transactions */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2411 | if (!list_empty(&pipe->transactions)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2412 | return -EBUSY; |
| 2413 | |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 2414 | list_del(&pipe->node); |
Aaro Koskinen | d2695a8 | 2013-10-10 23:25:32 +0300 | [diff] [blame] | 2415 | kfree(pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2416 | |
| 2417 | return 0; |
| 2418 | } |
| 2419 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2420 | /** |
| 2421 | * Get the current USB protocol level frame number. The frame |
| 2422 | * number is always in the range of 0-0x7ff. |
| 2423 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2424 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2425 | * |
| 2426 | * Returns: USB frame number |
| 2427 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2428 | static int cvmx_usb_get_frame_number(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2429 | { |
| 2430 | int frame_number; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2431 | union cvmx_usbcx_hfnum usbc_hfnum; |
| 2432 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2433 | usbc_hfnum.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2434 | frame_number = usbc_hfnum.s.frnum; |
| 2435 | |
| 2436 | return frame_number; |
| 2437 | } |
| 2438 | |
| 2439 | |
| 2440 | /** |
| 2441 | * Poll a channel for status |
| 2442 | * |
| 2443 | * @usb: USB device |
| 2444 | * @channel: Channel to poll |
| 2445 | * |
| 2446 | * Returns: Zero on success |
| 2447 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2448 | static int cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2449 | { |
Aaro Koskinen | ba0b8e4 | 2014-11-07 23:43:34 +0200 | [diff] [blame] | 2450 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 2451 | struct usb_hcd *hcd = octeon_to_hcd(priv); |
| 2452 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2453 | union cvmx_usbcx_hcintx usbc_hcint; |
| 2454 | union cvmx_usbcx_hctsizx usbc_hctsiz; |
| 2455 | union cvmx_usbcx_hccharx usbc_hcchar; |
| 2456 | struct cvmx_usb_pipe *pipe; |
| 2457 | struct cvmx_usb_transaction *transaction; |
| 2458 | int bytes_this_transfer; |
| 2459 | int bytes_in_last_packet; |
| 2460 | int packets_processed; |
| 2461 | int buffer_space_left; |
| 2462 | |
| 2463 | /* Read the interrupt status bits for the channel */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2464 | usbc_hcint.u32 = cvmx_usb_read_csr32(usb, |
| 2465 | CVMX_USBCX_HCINTX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2466 | |
| 2467 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2468 | usbc_hcchar.u32 = cvmx_usb_read_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2469 | CVMX_USBCX_HCCHARX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2470 | |
| 2471 | if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) { |
| 2472 | /* |
| 2473 | * There seems to be a bug in CN31XX which can cause |
| 2474 | * interrupt IN transfers to get stuck until we do a |
| 2475 | * write of HCCHARX without changing things |
| 2476 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2477 | cvmx_usb_write_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2478 | CVMX_USBCX_HCCHARX(channel, |
| 2479 | usb->index), |
| 2480 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2481 | return 0; |
| 2482 | } |
| 2483 | |
| 2484 | /* |
| 2485 | * In non DMA mode the channels don't halt themselves. We need |
| 2486 | * to manually disable channels that are left running |
| 2487 | */ |
| 2488 | if (!usbc_hcint.s.chhltd) { |
| 2489 | if (usbc_hcchar.s.chena) { |
| 2490 | union cvmx_usbcx_hcintmskx hcintmsk; |
| 2491 | /* Disable all interrupts except CHHLTD */ |
| 2492 | hcintmsk.u32 = 0; |
| 2493 | hcintmsk.s.chhltdmsk = 1; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2494 | cvmx_usb_write_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2495 | CVMX_USBCX_HCINTMSKX(channel, |
| 2496 | usb->index), |
| 2497 | hcintmsk.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2498 | usbc_hcchar.s.chdis = 1; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2499 | cvmx_usb_write_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2500 | CVMX_USBCX_HCCHARX(channel, |
| 2501 | usb->index), |
| 2502 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2503 | return 0; |
| 2504 | } else if (usbc_hcint.s.xfercompl) { |
| 2505 | /* |
| 2506 | * Successful IN/OUT with transfer complete. |
| 2507 | * Channel halt isn't needed. |
| 2508 | */ |
| 2509 | } else { |
Aaro Koskinen | ba0b8e4 | 2014-11-07 23:43:34 +0200 | [diff] [blame] | 2510 | dev_err(dev, "USB%d: Channel %d interrupt without halt\n", |
| 2511 | usb->index, channel); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2512 | return 0; |
| 2513 | } |
| 2514 | } |
| 2515 | } else { |
| 2516 | /* |
| 2517 | * There is are no interrupts that we need to process when the |
| 2518 | * channel is still running |
| 2519 | */ |
| 2520 | if (!usbc_hcint.s.chhltd) |
| 2521 | return 0; |
| 2522 | } |
| 2523 | |
| 2524 | /* Disable the channel interrupts now that it is done */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2525 | cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2526 | usb->idle_hardware_channels |= (1<<channel); |
| 2527 | |
| 2528 | /* Make sure this channel is tied to a valid pipe */ |
| 2529 | pipe = usb->pipe_for_channel[channel]; |
Aaro Koskinen | 20f6b82 | 2014-05-11 14:15:20 +0300 | [diff] [blame] | 2530 | prefetch(pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2531 | if (!pipe) |
| 2532 | return 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2533 | transaction = list_first_entry(&pipe->transactions, |
| 2534 | typeof(*transaction), |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2535 | node); |
Aaro Koskinen | 20f6b82 | 2014-05-11 14:15:20 +0300 | [diff] [blame] | 2536 | prefetch(transaction); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2537 | |
| 2538 | /* |
| 2539 | * Disconnect this pipe from the HW channel. Later the schedule |
| 2540 | * function will figure out which pipe needs to go |
| 2541 | */ |
| 2542 | usb->pipe_for_channel[channel] = NULL; |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 2543 | pipe->flags &= ~CVMX_USB_PIPE_FLAGS_SCHEDULED; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2544 | |
| 2545 | /* |
| 2546 | * Read the channel config info so we can figure out how much data |
Gustavo A. R. Silva | 1cf3273 | 2015-01-11 15:50:37 -0600 | [diff] [blame] | 2547 | * transferred |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2548 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2549 | usbc_hcchar.u32 = cvmx_usb_read_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2550 | CVMX_USBCX_HCCHARX(channel, usb->index)); |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2551 | usbc_hctsiz.u32 = cvmx_usb_read_csr32(usb, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2552 | CVMX_USBCX_HCTSIZX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2553 | |
| 2554 | /* |
| 2555 | * Calculating the number of bytes successfully transferred is dependent |
| 2556 | * on the transfer direction |
| 2557 | */ |
| 2558 | packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt; |
| 2559 | if (usbc_hcchar.s.epdir) { |
| 2560 | /* |
| 2561 | * IN transactions are easy. For every byte received the |
| 2562 | * hardware decrements xfersize. All we need to do is subtract |
| 2563 | * the current value of xfersize from its starting value and we |
| 2564 | * know how many bytes were written to the buffer |
| 2565 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2566 | bytes_this_transfer = transaction->xfersize - |
| 2567 | usbc_hctsiz.s.xfersize; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2568 | } else { |
| 2569 | /* |
| 2570 | * OUT transaction don't decrement xfersize. Instead pktcnt is |
| 2571 | * decremented on every successful packet send. The hardware |
| 2572 | * does this when it receives an ACK, or NYET. If it doesn't |
| 2573 | * receive one of these responses pktcnt doesn't change |
| 2574 | */ |
| 2575 | bytes_this_transfer = packets_processed * usbc_hcchar.s.mps; |
| 2576 | /* |
| 2577 | * The last packet may not be a full transfer if we didn't have |
| 2578 | * enough data |
| 2579 | */ |
| 2580 | if (bytes_this_transfer > transaction->xfersize) |
| 2581 | bytes_this_transfer = transaction->xfersize; |
| 2582 | } |
| 2583 | /* Figure out how many bytes were in the last packet of the transfer */ |
| 2584 | if (packets_processed) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2585 | bytes_in_last_packet = bytes_this_transfer - |
| 2586 | (packets_processed - 1) * usbc_hcchar.s.mps; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2587 | else |
| 2588 | bytes_in_last_packet = bytes_this_transfer; |
| 2589 | |
| 2590 | /* |
| 2591 | * As a special case, setup transactions output the setup header, not |
| 2592 | * the user's data. For this reason we don't count setup data as bytes |
| 2593 | * transferred |
| 2594 | */ |
| 2595 | if ((transaction->stage == CVMX_USB_STAGE_SETUP) || |
| 2596 | (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE)) |
| 2597 | bytes_this_transfer = 0; |
| 2598 | |
| 2599 | /* |
| 2600 | * Add the bytes transferred to the running total. It is important that |
| 2601 | * bytes_this_transfer doesn't count any data that needs to be |
| 2602 | * retransmitted |
| 2603 | */ |
| 2604 | transaction->actual_bytes += bytes_this_transfer; |
| 2605 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2606 | buffer_space_left = transaction->iso_packets[0].length - |
| 2607 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2608 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2609 | buffer_space_left = transaction->buffer_length - |
| 2610 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2611 | |
| 2612 | /* |
| 2613 | * We need to remember the PID toggle state for the next transaction. |
| 2614 | * The hardware already updated it for the next transaction |
| 2615 | */ |
| 2616 | pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0); |
| 2617 | |
| 2618 | /* |
| 2619 | * For high speed bulk out, assume the next transaction will need to do |
| 2620 | * a ping before proceeding. If this isn't true the ACK processing below |
| 2621 | * will clear this flag |
| 2622 | */ |
| 2623 | if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && |
| 2624 | (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && |
| 2625 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT)) |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 2626 | pipe->flags |= CVMX_USB_PIPE_FLAGS_NEED_PING; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2627 | |
Aaro Koskinen | f3b8edc | 2015-03-22 17:38:00 +0200 | [diff] [blame] | 2628 | if (unlikely(WARN_ON_ONCE(bytes_this_transfer < 0))) { |
| 2629 | /* |
| 2630 | * In some rare cases the DMA engine seems to get stuck and |
| 2631 | * keeps substracting same byte count over and over again. In |
| 2632 | * such case we just need to fail every transaction. |
| 2633 | */ |
| 2634 | cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2635 | CVMX_USB_COMPLETE_ERROR); |
| 2636 | return 0; |
| 2637 | } |
| 2638 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2639 | if (usbc_hcint.s.stall) { |
| 2640 | /* |
| 2641 | * STALL as a response means this transaction cannot be |
| 2642 | * completed because the device can't process transactions. Tell |
| 2643 | * the user. Any data that was transferred will be counted on |
| 2644 | * the actual bytes transferred |
| 2645 | */ |
| 2646 | pipe->pid_toggle = 0; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2647 | cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2648 | CVMX_USB_COMPLETE_STALL); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2649 | } else if (usbc_hcint.s.xacterr) { |
| 2650 | /* |
Aaro Koskinen | 532edc9 | 2015-03-22 17:37:52 +0200 | [diff] [blame] | 2651 | * XactErr as a response means the device signaled |
| 2652 | * something wrong with the transfer. For example, PID |
| 2653 | * toggle errors cause these. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2654 | */ |
Aaro Koskinen | 532edc9 | 2015-03-22 17:37:52 +0200 | [diff] [blame] | 2655 | cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2656 | CVMX_USB_COMPLETE_XACTERR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2657 | } else if (usbc_hcint.s.bblerr) { |
| 2658 | /* Babble Error (BblErr) */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2659 | cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2660 | CVMX_USB_COMPLETE_BABBLEERR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2661 | } else if (usbc_hcint.s.datatglerr) { |
Aaro Koskinen | d8c39d3 | 2014-06-29 22:52:54 +0300 | [diff] [blame] | 2662 | /* Data toggle error */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2663 | cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2664 | CVMX_USB_COMPLETE_DATATGLERR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2665 | } else if (usbc_hcint.s.nyet) { |
| 2666 | /* |
| 2667 | * NYET as a response is only allowed in three cases: as a |
| 2668 | * response to a ping, as a response to a split transaction, and |
| 2669 | * as a response to a bulk out. The ping case is handled by |
| 2670 | * hardware, so we only have splits and bulk out |
| 2671 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2672 | if (!cvmx_usb_pipe_needs_split(usb, pipe)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2673 | transaction->retries = 0; |
| 2674 | /* |
| 2675 | * If there is more data to go then we need to try |
| 2676 | * again. Otherwise this transaction is complete |
| 2677 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2678 | if ((buffer_space_left == 0) || |
| 2679 | (bytes_in_last_packet < pipe->max_packet)) |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2680 | cvmx_usb_perform_complete(usb, pipe, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2681 | transaction, |
| 2682 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2683 | } else { |
| 2684 | /* |
| 2685 | * Split transactions retry the split complete 4 times |
| 2686 | * then rewind to the start split and do the entire |
| 2687 | * transactions again |
| 2688 | */ |
| 2689 | transaction->retries++; |
| 2690 | if ((transaction->retries & 0x3) == 0) { |
| 2691 | /* |
| 2692 | * Rewind to the beginning of the transaction by |
| 2693 | * anding off the split complete bit |
| 2694 | */ |
| 2695 | transaction->stage &= ~1; |
| 2696 | pipe->split_sc_frame = -1; |
| 2697 | } |
| 2698 | } |
| 2699 | } else if (usbc_hcint.s.ack) { |
| 2700 | transaction->retries = 0; |
| 2701 | /* |
| 2702 | * The ACK bit can only be checked after the other error bits. |
| 2703 | * This is because a multi packet transfer may succeed in a |
| 2704 | * number of packets and then get a different response on the |
| 2705 | * last packet. In this case both ACK and the last response bit |
| 2706 | * will be set. If none of the other response bits is set, then |
| 2707 | * the last packet must have been an ACK |
| 2708 | * |
| 2709 | * Since we got an ACK, we know we don't need to do a ping on |
| 2710 | * this pipe |
| 2711 | */ |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 2712 | pipe->flags &= ~CVMX_USB_PIPE_FLAGS_NEED_PING; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2713 | |
| 2714 | switch (transaction->type) { |
| 2715 | case CVMX_USB_TRANSFER_CONTROL: |
| 2716 | switch (transaction->stage) { |
| 2717 | case CVMX_USB_STAGE_NON_CONTROL: |
| 2718 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: |
| 2719 | /* This should be impossible */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2720 | cvmx_usb_perform_complete(usb, pipe, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2721 | transaction, CVMX_USB_COMPLETE_ERROR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2722 | break; |
| 2723 | case CVMX_USB_STAGE_SETUP: |
| 2724 | pipe->pid_toggle = 1; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2725 | if (cvmx_usb_pipe_needs_split(usb, pipe)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2726 | transaction->stage = |
| 2727 | CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2728 | else { |
Aaro Koskinen | e301dfb | 2014-08-31 23:43:50 +0300 | [diff] [blame] | 2729 | struct usb_ctrlrequest *header = |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2730 | cvmx_phys_to_ptr(transaction->control_header); |
Aaro Koskinen | e301dfb | 2014-08-31 23:43:50 +0300 | [diff] [blame] | 2731 | if (header->wLength) |
Aleh Suprunovich | 9109fcf | 2014-10-07 14:52:52 +0300 | [diff] [blame] | 2732 | transaction->stage = |
| 2733 | CVMX_USB_STAGE_DATA; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2734 | else |
Aleh Suprunovich | 9109fcf | 2014-10-07 14:52:52 +0300 | [diff] [blame] | 2735 | transaction->stage = |
| 2736 | CVMX_USB_STAGE_STATUS; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2737 | } |
| 2738 | break; |
| 2739 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: |
| 2740 | { |
Aaro Koskinen | e301dfb | 2014-08-31 23:43:50 +0300 | [diff] [blame] | 2741 | struct usb_ctrlrequest *header = |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2742 | cvmx_phys_to_ptr(transaction->control_header); |
Aaro Koskinen | e301dfb | 2014-08-31 23:43:50 +0300 | [diff] [blame] | 2743 | if (header->wLength) |
Aleh Suprunovich | 9109fcf | 2014-10-07 14:52:52 +0300 | [diff] [blame] | 2744 | transaction->stage = |
| 2745 | CVMX_USB_STAGE_DATA; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2746 | else |
Aleh Suprunovich | 9109fcf | 2014-10-07 14:52:52 +0300 | [diff] [blame] | 2747 | transaction->stage = |
| 2748 | CVMX_USB_STAGE_STATUS; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2749 | } |
| 2750 | break; |
| 2751 | case CVMX_USB_STAGE_DATA: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2752 | if (cvmx_usb_pipe_needs_split(usb, pipe)) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2753 | transaction->stage = |
| 2754 | CVMX_USB_STAGE_DATA_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2755 | /* |
| 2756 | * For setup OUT data that are splits, |
| 2757 | * the hardware doesn't appear to count |
| 2758 | * transferred data. Here we manually |
| 2759 | * update the data transferred |
| 2760 | */ |
| 2761 | if (!usbc_hcchar.s.epdir) { |
| 2762 | if (buffer_space_left < pipe->max_packet) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2763 | transaction->actual_bytes += |
| 2764 | buffer_space_left; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2765 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2766 | transaction->actual_bytes += |
| 2767 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2768 | } |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2769 | } else if ((buffer_space_left == 0) || |
| 2770 | (bytes_in_last_packet < |
| 2771 | pipe->max_packet)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2772 | pipe->pid_toggle = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2773 | transaction->stage = |
| 2774 | CVMX_USB_STAGE_STATUS; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2775 | } |
| 2776 | break; |
| 2777 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2778 | if ((buffer_space_left == 0) || |
| 2779 | (bytes_in_last_packet < |
| 2780 | pipe->max_packet)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2781 | pipe->pid_toggle = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2782 | transaction->stage = |
| 2783 | CVMX_USB_STAGE_STATUS; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2784 | } else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2785 | transaction->stage = |
| 2786 | CVMX_USB_STAGE_DATA; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2787 | } |
| 2788 | break; |
| 2789 | case CVMX_USB_STAGE_STATUS: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2790 | if (cvmx_usb_pipe_needs_split(usb, pipe)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2791 | transaction->stage = |
| 2792 | CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2793 | else |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2794 | cvmx_usb_perform_complete(usb, pipe, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2795 | transaction, |
| 2796 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2797 | break; |
| 2798 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2799 | cvmx_usb_perform_complete(usb, pipe, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2800 | transaction, |
| 2801 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2802 | break; |
| 2803 | } |
| 2804 | break; |
| 2805 | case CVMX_USB_TRANSFER_BULK: |
| 2806 | case CVMX_USB_TRANSFER_INTERRUPT: |
| 2807 | /* |
| 2808 | * The only time a bulk transfer isn't complete when it |
| 2809 | * finishes with an ACK is during a split transaction. |
| 2810 | * For splits we need to continue the transfer if more |
| 2811 | * data is needed |
| 2812 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2813 | if (cvmx_usb_pipe_needs_split(usb, pipe)) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2814 | if (transaction->stage == |
| 2815 | CVMX_USB_STAGE_NON_CONTROL) |
| 2816 | transaction->stage = |
| 2817 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2818 | else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2819 | if (buffer_space_left && |
| 2820 | (bytes_in_last_packet == |
| 2821 | pipe->max_packet)) |
| 2822 | transaction->stage = |
| 2823 | CVMX_USB_STAGE_NON_CONTROL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2824 | else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2825 | if (transaction->type == |
| 2826 | CVMX_USB_TRANSFER_INTERRUPT) |
| 2827 | pipe->next_tx_frame += |
| 2828 | pipe->interval; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2829 | cvmx_usb_perform_complete( |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2830 | usb, |
| 2831 | pipe, |
| 2832 | transaction, |
| 2833 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2834 | } |
| 2835 | } |
| 2836 | } else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2837 | if ((pipe->device_speed == |
| 2838 | CVMX_USB_SPEED_HIGH) && |
| 2839 | (pipe->transfer_type == |
| 2840 | CVMX_USB_TRANSFER_BULK) && |
| 2841 | (pipe->transfer_dir == |
| 2842 | CVMX_USB_DIRECTION_OUT) && |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2843 | (usbc_hcint.s.nak)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2844 | pipe->flags |= |
Aaro Koskinen | 3f9697b | 2015-03-22 17:37:48 +0200 | [diff] [blame] | 2845 | CVMX_USB_PIPE_FLAGS_NEED_PING; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2846 | if (!buffer_space_left || |
| 2847 | (bytes_in_last_packet < |
| 2848 | pipe->max_packet)) { |
| 2849 | if (transaction->type == |
| 2850 | CVMX_USB_TRANSFER_INTERRUPT) |
| 2851 | pipe->next_tx_frame += |
| 2852 | pipe->interval; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2853 | cvmx_usb_perform_complete(usb, pipe, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2854 | transaction, |
| 2855 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2856 | } |
| 2857 | } |
| 2858 | break; |
| 2859 | case CVMX_USB_TRANSFER_ISOCHRONOUS: |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2860 | if (cvmx_usb_pipe_needs_split(usb, pipe)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2861 | /* |
| 2862 | * ISOCHRONOUS OUT splits don't require a |
| 2863 | * complete split stage. Instead they use a |
| 2864 | * sequence of begin OUT splits to transfer the |
| 2865 | * data 188 bytes at a time. Once the transfer |
| 2866 | * is complete, the pipe sleeps until the next |
| 2867 | * schedule interval |
| 2868 | */ |
Aleh Suprunovich | 9109fcf | 2014-10-07 14:52:52 +0300 | [diff] [blame] | 2869 | if (pipe->transfer_dir == |
| 2870 | CVMX_USB_DIRECTION_OUT) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2871 | /* |
| 2872 | * If no space left or this wasn't a max |
| 2873 | * size packet then this transfer is |
| 2874 | * complete. Otherwise start it again to |
| 2875 | * send the next 188 bytes |
| 2876 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2877 | if (!buffer_space_left || |
| 2878 | (bytes_this_transfer < 188)) { |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 2879 | pipe->next_tx_frame += |
| 2880 | pipe->interval; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2881 | cvmx_usb_perform_complete(usb, |
| 2882 | pipe, transaction, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2883 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2884 | } |
| 2885 | } else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2886 | if (transaction->stage == |
| 2887 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2888 | /* |
| 2889 | * We are in the incoming data |
| 2890 | * phase. Keep getting data |
| 2891 | * until we run out of space or |
| 2892 | * get a small packet |
| 2893 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2894 | if ((buffer_space_left == 0) || |
| 2895 | (bytes_in_last_packet < |
| 2896 | pipe->max_packet)) { |
| 2897 | pipe->next_tx_frame += |
| 2898 | pipe->interval; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2899 | cvmx_usb_perform_complete( |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2900 | usb, |
| 2901 | pipe, |
| 2902 | transaction, |
| 2903 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2904 | } |
| 2905 | } else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2906 | transaction->stage = |
| 2907 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2908 | } |
| 2909 | } else { |
| 2910 | pipe->next_tx_frame += pipe->interval; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2911 | cvmx_usb_perform_complete(usb, pipe, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2912 | transaction, |
| 2913 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2914 | } |
| 2915 | break; |
| 2916 | } |
| 2917 | } else if (usbc_hcint.s.nak) { |
| 2918 | /* |
| 2919 | * If this was a split then clear our split in progress marker. |
| 2920 | */ |
| 2921 | if (usb->active_split == transaction) |
| 2922 | usb->active_split = NULL; |
| 2923 | /* |
| 2924 | * NAK as a response means the device couldn't accept the |
| 2925 | * transaction, but it should be retried in the future. Rewind |
| 2926 | * to the beginning of the transaction by anding off the split |
| 2927 | * complete bit. Retry in the next interval |
| 2928 | */ |
| 2929 | transaction->retries = 0; |
| 2930 | transaction->stage &= ~1; |
| 2931 | pipe->next_tx_frame += pipe->interval; |
| 2932 | if (pipe->next_tx_frame < usb->frame_number) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2933 | pipe->next_tx_frame = usb->frame_number + |
| 2934 | pipe->interval - |
| 2935 | (usb->frame_number - pipe->next_tx_frame) % |
| 2936 | pipe->interval; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2937 | } else { |
| 2938 | struct cvmx_usb_port_status port; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 2939 | |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2940 | port = cvmx_usb_get_status(usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2941 | if (port.port_enabled) { |
| 2942 | /* We'll retry the exact same transaction again */ |
| 2943 | transaction->retries++; |
| 2944 | } else { |
| 2945 | /* |
| 2946 | * We get channel halted interrupts with no result bits |
| 2947 | * sets when the cable is unplugged |
| 2948 | */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2949 | cvmx_usb_perform_complete(usb, pipe, transaction, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2950 | CVMX_USB_COMPLETE_ERROR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2951 | } |
| 2952 | } |
| 2953 | return 0; |
| 2954 | } |
| 2955 | |
Aaro Koskinen | 393e214 | 2013-10-06 22:22:27 +0300 | [diff] [blame] | 2956 | static void octeon_usb_port_callback(struct cvmx_usb_state *usb) |
| 2957 | { |
| 2958 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 2959 | |
| 2960 | spin_unlock(&priv->lock); |
| 2961 | usb_hcd_poll_rh_status(octeon_to_hcd(priv)); |
| 2962 | spin_lock(&priv->lock); |
| 2963 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2964 | |
| 2965 | /** |
| 2966 | * Poll the USB block for status and call all needed callback |
| 2967 | * handlers. This function is meant to be called in the interrupt |
| 2968 | * handler for the USB controller. It can also be called |
| 2969 | * periodically in a loop for non-interrupt based operation. |
| 2970 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2971 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2972 | * |
| 2973 | * Returns: 0 or a negative error code. |
| 2974 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2975 | static int cvmx_usb_poll(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2976 | { |
| 2977 | union cvmx_usbcx_hfnum usbc_hfnum; |
| 2978 | union cvmx_usbcx_gintsts usbc_gintsts; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2979 | |
Aaro Koskinen | 20f6b82 | 2014-05-11 14:15:20 +0300 | [diff] [blame] | 2980 | prefetch_range(usb, sizeof(*usb)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2981 | |
| 2982 | /* Update the frame counter */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2983 | usbc_hfnum.u32 = cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2984 | if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum) |
| 2985 | usb->frame_number += 0x4000; |
| 2986 | usb->frame_number &= ~0x3fffull; |
| 2987 | usb->frame_number |= usbc_hfnum.s.frnum; |
| 2988 | |
| 2989 | /* Read the pending interrupts */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2990 | usbc_gintsts.u32 = cvmx_usb_read_csr32(usb, |
| 2991 | CVMX_USBCX_GINTSTS(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2992 | |
| 2993 | /* Clear the interrupts now that we know about them */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 2994 | cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), |
| 2995 | usbc_gintsts.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2996 | |
| 2997 | if (usbc_gintsts.s.rxflvl) { |
| 2998 | /* |
| 2999 | * RxFIFO Non-Empty (RxFLvl) |
| 3000 | * Indicates that there is at least one packet pending to be |
| 3001 | * read from the RxFIFO. |
| 3002 | * |
| 3003 | * In DMA mode this is handled by hardware |
| 3004 | */ |
| 3005 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 3006 | cvmx_usb_poll_rx_fifo(usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3007 | } |
| 3008 | if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) { |
| 3009 | /* Fill the Tx FIFOs when not in DMA mode */ |
| 3010 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 3011 | cvmx_usb_poll_tx_fifo(usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3012 | } |
| 3013 | if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) { |
| 3014 | union cvmx_usbcx_hprt usbc_hprt; |
| 3015 | /* |
| 3016 | * Disconnect Detected Interrupt (DisconnInt) |
| 3017 | * Asserted when a device disconnect is detected. |
| 3018 | * |
| 3019 | * Host Port Interrupt (PrtInt) |
| 3020 | * The core sets this bit to indicate a change in port status of |
| 3021 | * one of the O2P USB core ports in Host mode. The application |
| 3022 | * must read the Host Port Control and Status (HPRT) register to |
| 3023 | * determine the exact event that caused this interrupt. The |
| 3024 | * application must clear the appropriate status bit in the Host |
| 3025 | * Port Control and Status register to clear this bit. |
| 3026 | * |
| 3027 | * Call the user's port callback |
| 3028 | */ |
Aaro Koskinen | 393e214 | 2013-10-06 22:22:27 +0300 | [diff] [blame] | 3029 | octeon_usb_port_callback(usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3030 | /* Clear the port change bits */ |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 3031 | usbc_hprt.u32 = cvmx_usb_read_csr32(usb, |
| 3032 | CVMX_USBCX_HPRT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3033 | usbc_hprt.s.prtena = 0; |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 3034 | cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), |
| 3035 | usbc_hprt.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3036 | } |
| 3037 | if (usbc_gintsts.s.hchint) { |
| 3038 | /* |
| 3039 | * Host Channels Interrupt (HChInt) |
| 3040 | * The core sets this bit to indicate that an interrupt is |
| 3041 | * pending on one of the channels of the core (in Host mode). |
| 3042 | * The application must read the Host All Channels Interrupt |
| 3043 | * (HAINT) register to determine the exact number of the channel |
| 3044 | * on which the interrupt occurred, and then read the |
| 3045 | * corresponding Host Channel-n Interrupt (HCINTn) register to |
| 3046 | * determine the exact cause of the interrupt. The application |
| 3047 | * must clear the appropriate status bit in the HCINTn register |
| 3048 | * to clear this bit. |
| 3049 | */ |
| 3050 | union cvmx_usbcx_haint usbc_haint; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 3051 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 3052 | usbc_haint.u32 = cvmx_usb_read_csr32(usb, |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 3053 | CVMX_USBCX_HAINT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3054 | while (usbc_haint.u32) { |
| 3055 | int channel; |
| 3056 | |
| 3057 | channel = __fls(usbc_haint.u32); |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 3058 | cvmx_usb_poll_channel(usb, channel); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3059 | usbc_haint.u32 ^= 1<<channel; |
| 3060 | } |
| 3061 | } |
| 3062 | |
Aaro Koskinen | 68d435d | 2015-03-22 17:37:47 +0200 | [diff] [blame] | 3063 | cvmx_usb_schedule(usb, usbc_gintsts.s.sof); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3064 | |
| 3065 | return 0; |
| 3066 | } |
| 3067 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3068 | /* convert between an HCD pointer and the corresponding struct octeon_hcd */ |
| 3069 | static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd) |
| 3070 | { |
| 3071 | return (struct octeon_hcd *)(hcd->hcd_priv); |
| 3072 | } |
| 3073 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3074 | static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd) |
| 3075 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3076 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 3077 | unsigned long flags; |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3078 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3079 | spin_lock_irqsave(&priv->lock, flags); |
| 3080 | cvmx_usb_poll(&priv->usb); |
| 3081 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3082 | return IRQ_HANDLED; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3083 | } |
| 3084 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3085 | static int octeon_usb_start(struct usb_hcd *hcd) |
| 3086 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3087 | hcd->state = HC_STATE_RUNNING; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3088 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3089 | } |
| 3090 | |
| 3091 | static void octeon_usb_stop(struct usb_hcd *hcd) |
| 3092 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3093 | hcd->state = HC_STATE_HALT; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3094 | } |
| 3095 | |
| 3096 | static int octeon_usb_get_frame_number(struct usb_hcd *hcd) |
| 3097 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3098 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3099 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3100 | return cvmx_usb_get_frame_number(&priv->usb); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3101 | } |
| 3102 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3103 | static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3104 | struct urb *urb, |
| 3105 | gfp_t mem_flags) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3106 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3107 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3108 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3109 | struct cvmx_usb_transaction *transaction = NULL; |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3110 | struct cvmx_usb_pipe *pipe; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3111 | unsigned long flags; |
Aaro Koskinen | 6e0e1b0 | 2013-07-30 23:43:04 +0300 | [diff] [blame] | 3112 | struct cvmx_usb_iso_packet *iso_packet; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3113 | struct usb_host_endpoint *ep = urb->ep; |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3114 | int rc; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3115 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3116 | urb->status = 0; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3117 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3118 | |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3119 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
| 3120 | if (rc) { |
| 3121 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3122 | return rc; |
| 3123 | } |
| 3124 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3125 | if (!ep->hcpriv) { |
Aaro Koskinen | 394d4e0 | 2013-07-30 23:42:54 +0300 | [diff] [blame] | 3126 | enum cvmx_usb_transfer transfer_type; |
Aaro Koskinen | 4918072 | 2013-07-30 23:42:53 +0300 | [diff] [blame] | 3127 | enum cvmx_usb_speed speed; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3128 | int split_device = 0; |
| 3129 | int split_port = 0; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 3130 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3131 | switch (usb_pipetype(urb->pipe)) { |
| 3132 | case PIPE_ISOCHRONOUS: |
| 3133 | transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS; |
| 3134 | break; |
| 3135 | case PIPE_INTERRUPT: |
| 3136 | transfer_type = CVMX_USB_TRANSFER_INTERRUPT; |
| 3137 | break; |
| 3138 | case PIPE_CONTROL: |
| 3139 | transfer_type = CVMX_USB_TRANSFER_CONTROL; |
| 3140 | break; |
| 3141 | default: |
| 3142 | transfer_type = CVMX_USB_TRANSFER_BULK; |
| 3143 | break; |
| 3144 | } |
| 3145 | switch (urb->dev->speed) { |
| 3146 | case USB_SPEED_LOW: |
| 3147 | speed = CVMX_USB_SPEED_LOW; |
| 3148 | break; |
| 3149 | case USB_SPEED_FULL: |
| 3150 | speed = CVMX_USB_SPEED_FULL; |
| 3151 | break; |
| 3152 | default: |
| 3153 | speed = CVMX_USB_SPEED_HIGH; |
| 3154 | break; |
| 3155 | } |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3156 | /* |
| 3157 | * For slow devices on high speed ports we need to find the hub |
| 3158 | * that does the speed translation so we know where to send the |
| 3159 | * split transactions. |
| 3160 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3161 | if (speed != CVMX_USB_SPEED_HIGH) { |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3162 | /* |
| 3163 | * Start at this device and work our way up the usb |
| 3164 | * tree. |
| 3165 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3166 | struct usb_device *dev = urb->dev; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 3167 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3168 | while (dev->parent) { |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3169 | /* |
| 3170 | * If our parent is high speed then he'll |
| 3171 | * receive the splits. |
| 3172 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3173 | if (dev->parent->speed == USB_SPEED_HIGH) { |
| 3174 | split_device = dev->parent->devnum; |
| 3175 | split_port = dev->portnum; |
| 3176 | break; |
| 3177 | } |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3178 | /* |
| 3179 | * Move up the tree one level. If we make it all |
| 3180 | * the way up the tree, then the port must not |
| 3181 | * be in high speed mode and we don't need a |
| 3182 | * split. |
| 3183 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3184 | dev = dev->parent; |
| 3185 | } |
| 3186 | } |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3187 | pipe = cvmx_usb_open_pipe(&priv->usb, usb_pipedevice(urb->pipe), |
| 3188 | usb_pipeendpoint(urb->pipe), speed, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3189 | le16_to_cpu(ep->desc.wMaxPacketSize) |
| 3190 | & 0x7ff, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3191 | transfer_type, |
| 3192 | usb_pipein(urb->pipe) ? |
| 3193 | CVMX_USB_DIRECTION_IN : |
| 3194 | CVMX_USB_DIRECTION_OUT, |
| 3195 | urb->interval, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3196 | (le16_to_cpu(ep->desc.wMaxPacketSize) |
| 3197 | >> 11) & 0x3, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3198 | split_device, split_port); |
| 3199 | if (!pipe) { |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3200 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3201 | spin_unlock_irqrestore(&priv->lock, flags); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3202 | dev_dbg(dev, "Failed to create pipe\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3203 | return -ENOMEM; |
| 3204 | } |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3205 | ep->hcpriv = pipe; |
Aaro Koskinen | c7609ea | 2013-06-13 01:00:33 +0300 | [diff] [blame] | 3206 | } else { |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3207 | pipe = ep->hcpriv; |
Aaro Koskinen | c7609ea | 2013-06-13 01:00:33 +0300 | [diff] [blame] | 3208 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3209 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3210 | switch (usb_pipetype(urb->pipe)) { |
| 3211 | case PIPE_ISOCHRONOUS: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3212 | dev_dbg(dev, "Submit isochronous to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3213 | usb_pipedevice(urb->pipe), |
| 3214 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3215 | /* |
| 3216 | * Allocate a structure to use for our private list of |
| 3217 | * isochronous packets. |
| 3218 | */ |
Cristina Moraru | 73eee56 | 2015-10-21 20:00:50 +0300 | [diff] [blame] | 3219 | iso_packet = kmalloc_array(urb->number_of_packets, |
| 3220 | sizeof(struct cvmx_usb_iso_packet), |
| 3221 | GFP_ATOMIC); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3222 | if (iso_packet) { |
| 3223 | int i; |
| 3224 | /* Fill the list with the data from the URB */ |
| 3225 | for (i = 0; i < urb->number_of_packets; i++) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3226 | iso_packet[i].offset = |
| 3227 | urb->iso_frame_desc[i].offset; |
| 3228 | iso_packet[i].length = |
| 3229 | urb->iso_frame_desc[i].length; |
| 3230 | iso_packet[i].status = |
| 3231 | CVMX_USB_COMPLETE_ERROR; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3232 | } |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3233 | /* |
| 3234 | * Store a pointer to the list in the URB setup_packet |
| 3235 | * field. We know this currently isn't being used and |
| 3236 | * this saves us a bunch of logic. |
| 3237 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3238 | urb->setup_packet = (char *)iso_packet; |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3239 | transaction = cvmx_usb_submit_isochronous(&priv->usb, |
| 3240 | pipe, urb); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3241 | /* |
| 3242 | * If submit failed we need to free our private packet |
| 3243 | * list. |
| 3244 | */ |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3245 | if (!transaction) { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3246 | urb->setup_packet = NULL; |
| 3247 | kfree(iso_packet); |
| 3248 | } |
| 3249 | } |
| 3250 | break; |
| 3251 | case PIPE_INTERRUPT: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3252 | dev_dbg(dev, "Submit interrupt to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3253 | usb_pipedevice(urb->pipe), |
| 3254 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3255 | transaction = cvmx_usb_submit_interrupt(&priv->usb, pipe, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3256 | break; |
| 3257 | case PIPE_CONTROL: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3258 | dev_dbg(dev, "Submit control to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3259 | usb_pipedevice(urb->pipe), |
| 3260 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3261 | transaction = cvmx_usb_submit_control(&priv->usb, pipe, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3262 | break; |
| 3263 | case PIPE_BULK: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3264 | dev_dbg(dev, "Submit bulk to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3265 | usb_pipedevice(urb->pipe), |
| 3266 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3267 | transaction = cvmx_usb_submit_bulk(&priv->usb, pipe, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3268 | break; |
| 3269 | } |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3270 | if (!transaction) { |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3271 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3272 | spin_unlock_irqrestore(&priv->lock, flags); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3273 | dev_dbg(dev, "Failed to submit\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3274 | return -ENOMEM; |
| 3275 | } |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3276 | urb->hcpriv = transaction; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3277 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3278 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3279 | } |
| 3280 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3281 | static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, |
| 3282 | struct urb *urb, |
| 3283 | int status) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3284 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3285 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 3286 | unsigned long flags; |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3287 | int rc; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3288 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3289 | if (!urb->dev) |
| 3290 | return -EINVAL; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3291 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3292 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3293 | |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3294 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 3295 | if (rc) |
| 3296 | goto out; |
| 3297 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3298 | urb->status = status; |
Aaro Koskinen | cdd15d8 | 2014-06-29 22:52:52 +0300 | [diff] [blame] | 3299 | cvmx_usb_cancel(&priv->usb, urb->ep->hcpriv, urb->hcpriv); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3300 | |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3301 | out: |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3302 | spin_unlock_irqrestore(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3303 | |
Aaro Koskinen | e5b9089 | 2014-06-29 22:52:53 +0300 | [diff] [blame] | 3304 | return rc; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3305 | } |
| 3306 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3307 | static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, |
| 3308 | struct usb_host_endpoint *ep) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3309 | { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3310 | struct device *dev = hcd->self.controller; |
| 3311 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3312 | if (ep->hcpriv) { |
| 3313 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3314 | struct cvmx_usb_pipe *pipe = ep->hcpriv; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3315 | unsigned long flags; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 3316 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3317 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3318 | cvmx_usb_cancel_all(&priv->usb, pipe); |
| 3319 | if (cvmx_usb_close_pipe(&priv->usb, pipe)) |
| 3320 | dev_dbg(dev, "Closing pipe %p failed\n", pipe); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3321 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3322 | ep->hcpriv = NULL; |
| 3323 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3324 | } |
| 3325 | |
| 3326 | static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf) |
| 3327 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3328 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 51a1962 | 2013-07-30 23:43:03 +0300 | [diff] [blame] | 3329 | struct cvmx_usb_port_status port_status; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3330 | unsigned long flags; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3331 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3332 | spin_lock_irqsave(&priv->lock, flags); |
| 3333 | port_status = cvmx_usb_get_status(&priv->usb); |
| 3334 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3335 | buf[0] = 0; |
| 3336 | buf[0] = port_status.connect_change << 1; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3337 | |
Paul McQuade | 8522851 | 2014-04-08 16:32:48 +0100 | [diff] [blame] | 3338 | return buf[0] != 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3339 | } |
| 3340 | |
Paul Davies C | e725cef | 2014-05-11 18:41:33 +0530 | [diff] [blame] | 3341 | static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 3342 | u16 wIndex, char *buf, u16 wLength) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3343 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3344 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3345 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 51a1962 | 2013-07-30 23:43:03 +0300 | [diff] [blame] | 3346 | struct cvmx_usb_port_status usb_port_status; |
Aaro Koskinen | 0ed64a4 | 2015-03-22 17:37:55 +0200 | [diff] [blame] | 3347 | struct cvmx_usb_state *usb = &priv->usb; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3348 | int port_status; |
| 3349 | struct usb_hub_descriptor *desc; |
| 3350 | unsigned long flags; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3351 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3352 | switch (typeReq) { |
| 3353 | case ClearHubFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3354 | dev_dbg(dev, "ClearHubFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3355 | switch (wValue) { |
| 3356 | case C_HUB_LOCAL_POWER: |
| 3357 | case C_HUB_OVER_CURRENT: |
| 3358 | /* Nothing required here */ |
| 3359 | break; |
| 3360 | default: |
| 3361 | return -EINVAL; |
| 3362 | } |
| 3363 | break; |
| 3364 | case ClearPortFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3365 | dev_dbg(dev, "ClearPortFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3366 | if (wIndex != 1) { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3367 | dev_dbg(dev, " INVALID\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3368 | return -EINVAL; |
| 3369 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3370 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3371 | switch (wValue) { |
| 3372 | case USB_PORT_FEAT_ENABLE: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3373 | dev_dbg(dev, " ENABLE\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3374 | spin_lock_irqsave(&priv->lock, flags); |
| 3375 | cvmx_usb_disable(&priv->usb); |
| 3376 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3377 | break; |
| 3378 | case USB_PORT_FEAT_SUSPEND: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3379 | dev_dbg(dev, " SUSPEND\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3380 | /* Not supported on Octeon */ |
| 3381 | break; |
| 3382 | case USB_PORT_FEAT_POWER: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3383 | dev_dbg(dev, " POWER\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3384 | /* Not supported on Octeon */ |
| 3385 | break; |
| 3386 | case USB_PORT_FEAT_INDICATOR: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3387 | dev_dbg(dev, " INDICATOR\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3388 | /* Port inidicator not supported */ |
| 3389 | break; |
| 3390 | case USB_PORT_FEAT_C_CONNECTION: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3391 | dev_dbg(dev, " C_CONNECTION\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3392 | /* Clears drivers internal connect status change flag */ |
| 3393 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3394 | priv->usb.port_status = |
| 3395 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3396 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3397 | break; |
| 3398 | case USB_PORT_FEAT_C_RESET: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3399 | dev_dbg(dev, " C_RESET\n"); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3400 | /* |
| 3401 | * Clears the driver's internal Port Reset Change flag. |
| 3402 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3403 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3404 | priv->usb.port_status = |
| 3405 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3406 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3407 | break; |
| 3408 | case USB_PORT_FEAT_C_ENABLE: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3409 | dev_dbg(dev, " C_ENABLE\n"); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3410 | /* |
| 3411 | * Clears the driver's internal Port Enable/Disable |
| 3412 | * Change flag. |
| 3413 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3414 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3415 | priv->usb.port_status = |
| 3416 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3417 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3418 | break; |
| 3419 | case USB_PORT_FEAT_C_SUSPEND: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3420 | dev_dbg(dev, " C_SUSPEND\n"); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3421 | /* |
| 3422 | * Clears the driver's internal Port Suspend Change |
| 3423 | * flag, which is set when resume signaling on the host |
| 3424 | * port is complete. |
| 3425 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3426 | break; |
| 3427 | case USB_PORT_FEAT_C_OVER_CURRENT: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3428 | dev_dbg(dev, " C_OVER_CURRENT\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3429 | /* Clears the driver's overcurrent Change flag */ |
| 3430 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3431 | priv->usb.port_status = |
| 3432 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3433 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3434 | break; |
| 3435 | default: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3436 | dev_dbg(dev, " UNKNOWN\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3437 | return -EINVAL; |
| 3438 | } |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3439 | break; |
| 3440 | case GetHubDescriptor: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3441 | dev_dbg(dev, "GetHubDescriptor\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3442 | desc = (struct usb_hub_descriptor *)buf; |
| 3443 | desc->bDescLength = 9; |
| 3444 | desc->bDescriptorType = 0x29; |
| 3445 | desc->bNbrPorts = 1; |
Aaro Koskinen | e587338 | 2014-06-29 22:52:56 +0300 | [diff] [blame] | 3446 | desc->wHubCharacteristics = cpu_to_le16(0x08); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3447 | desc->bPwrOn2PwrGood = 1; |
| 3448 | desc->bHubContrCurrent = 0; |
| 3449 | desc->u.hs.DeviceRemovable[0] = 0; |
| 3450 | desc->u.hs.DeviceRemovable[1] = 0xff; |
| 3451 | break; |
| 3452 | case GetHubStatus: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3453 | dev_dbg(dev, "GetHubStatus\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3454 | *(__le32 *) buf = 0; |
| 3455 | break; |
| 3456 | case GetPortStatus: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3457 | dev_dbg(dev, "GetPortStatus\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3458 | if (wIndex != 1) { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3459 | dev_dbg(dev, " INVALID\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3460 | return -EINVAL; |
| 3461 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3462 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3463 | spin_lock_irqsave(&priv->lock, flags); |
| 3464 | usb_port_status = cvmx_usb_get_status(&priv->usb); |
| 3465 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3466 | port_status = 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3467 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3468 | if (usb_port_status.connect_change) { |
| 3469 | port_status |= (1 << USB_PORT_FEAT_C_CONNECTION); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3470 | dev_dbg(dev, " C_CONNECTION\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3471 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3472 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3473 | if (usb_port_status.port_enabled) { |
| 3474 | port_status |= (1 << USB_PORT_FEAT_C_ENABLE); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3475 | dev_dbg(dev, " C_ENABLE\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3476 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3477 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3478 | if (usb_port_status.connected) { |
| 3479 | port_status |= (1 << USB_PORT_FEAT_CONNECTION); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3480 | dev_dbg(dev, " CONNECTION\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3481 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3482 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3483 | if (usb_port_status.port_enabled) { |
| 3484 | port_status |= (1 << USB_PORT_FEAT_ENABLE); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3485 | dev_dbg(dev, " ENABLE\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3486 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3487 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3488 | if (usb_port_status.port_over_current) { |
| 3489 | port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3490 | dev_dbg(dev, " OVER_CURRENT\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3491 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3492 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3493 | if (usb_port_status.port_powered) { |
| 3494 | port_status |= (1 << USB_PORT_FEAT_POWER); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3495 | dev_dbg(dev, " POWER\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3496 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3497 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3498 | if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH) { |
| 3499 | port_status |= USB_PORT_STAT_HIGH_SPEED; |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3500 | dev_dbg(dev, " HIGHSPEED\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3501 | } else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW) { |
| 3502 | port_status |= (1 << USB_PORT_FEAT_LOWSPEED); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3503 | dev_dbg(dev, " LOWSPEED\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3504 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3505 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3506 | *((__le32 *) buf) = cpu_to_le32(port_status); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3507 | break; |
| 3508 | case SetHubFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3509 | dev_dbg(dev, "SetHubFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3510 | /* No HUB features supported */ |
| 3511 | break; |
| 3512 | case SetPortFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3513 | dev_dbg(dev, "SetPortFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3514 | if (wIndex != 1) { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3515 | dev_dbg(dev, " INVALID\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3516 | return -EINVAL; |
| 3517 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3518 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3519 | switch (wValue) { |
| 3520 | case USB_PORT_FEAT_SUSPEND: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3521 | dev_dbg(dev, " SUSPEND\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3522 | return -EINVAL; |
| 3523 | case USB_PORT_FEAT_POWER: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3524 | dev_dbg(dev, " POWER\n"); |
Aaro Koskinen | 0ed64a4 | 2015-03-22 17:37:55 +0200 | [diff] [blame] | 3525 | /* |
| 3526 | * Program the port power bit to drive VBUS on the USB. |
| 3527 | */ |
| 3528 | spin_lock_irqsave(&priv->lock, flags); |
| 3529 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), |
Aaro Koskinen | 6068e81 | 2015-03-28 21:24:33 +0200 | [diff] [blame] | 3530 | cvmx_usbcx_hprt, prtpwr, 1); |
Aaro Koskinen | 0ed64a4 | 2015-03-22 17:37:55 +0200 | [diff] [blame] | 3531 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3532 | return 0; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3533 | case USB_PORT_FEAT_RESET: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3534 | dev_dbg(dev, " RESET\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3535 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | b0c8c72 | 2015-03-22 17:37:58 +0200 | [diff] [blame] | 3536 | cvmx_usb_reset_port(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3537 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3538 | return 0; |
| 3539 | case USB_PORT_FEAT_INDICATOR: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3540 | dev_dbg(dev, " INDICATOR\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3541 | /* Not supported */ |
| 3542 | break; |
| 3543 | default: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3544 | dev_dbg(dev, " UNKNOWN\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3545 | return -EINVAL; |
| 3546 | } |
| 3547 | break; |
| 3548 | default: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3549 | dev_dbg(dev, "Unknown root hub request\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3550 | return -EINVAL; |
| 3551 | } |
| 3552 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3553 | } |
| 3554 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3555 | static const struct hc_driver octeon_hc_driver = { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3556 | .description = "Octeon USB", |
| 3557 | .product_desc = "Octeon Host Controller", |
| 3558 | .hcd_priv_size = sizeof(struct octeon_hcd), |
| 3559 | .irq = octeon_usb_irq, |
| 3560 | .flags = HCD_MEMORY | HCD_USB2, |
| 3561 | .start = octeon_usb_start, |
| 3562 | .stop = octeon_usb_stop, |
| 3563 | .urb_enqueue = octeon_usb_urb_enqueue, |
| 3564 | .urb_dequeue = octeon_usb_urb_dequeue, |
| 3565 | .endpoint_disable = octeon_usb_endpoint_disable, |
| 3566 | .get_frame_number = octeon_usb_get_frame_number, |
| 3567 | .hub_status_data = octeon_usb_hub_status_data, |
| 3568 | .hub_control = octeon_usb_hub_control, |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 3569 | .map_urb_for_dma = octeon_map_urb_for_dma, |
| 3570 | .unmap_urb_for_dma = octeon_unmap_urb_for_dma, |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3571 | }; |
| 3572 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3573 | static int octeon_usb_probe(struct platform_device *pdev) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3574 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3575 | int status; |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3576 | int initialize_flags; |
| 3577 | int usb_num; |
| 3578 | struct resource *res_mem; |
| 3579 | struct device_node *usbn_node; |
| 3580 | int irq = platform_get_irq(pdev, 0); |
| 3581 | struct device *dev = &pdev->dev; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3582 | struct octeon_hcd *priv; |
| 3583 | struct usb_hcd *hcd; |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3584 | u32 clock_rate = 48000000; |
| 3585 | bool is_crystal_clock = false; |
| 3586 | const char *clock_type; |
| 3587 | int i; |
| 3588 | |
| 3589 | if (dev->of_node == NULL) { |
| 3590 | dev_err(dev, "Error: empty of_node\n"); |
| 3591 | return -ENXIO; |
| 3592 | } |
| 3593 | usbn_node = dev->of_node->parent; |
| 3594 | |
| 3595 | i = of_property_read_u32(usbn_node, |
| 3596 | "refclk-frequency", &clock_rate); |
| 3597 | if (i) { |
| 3598 | dev_err(dev, "No USBN \"refclk-frequency\"\n"); |
| 3599 | return -ENXIO; |
| 3600 | } |
| 3601 | switch (clock_rate) { |
| 3602 | case 12000000: |
| 3603 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ; |
| 3604 | break; |
| 3605 | case 24000000: |
| 3606 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ; |
| 3607 | break; |
| 3608 | case 48000000: |
| 3609 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ; |
| 3610 | break; |
| 3611 | default: |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3612 | dev_err(dev, "Illebal USBN \"refclk-frequency\" %u\n", |
| 3613 | clock_rate); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3614 | return -ENXIO; |
| 3615 | |
| 3616 | } |
| 3617 | |
| 3618 | i = of_property_read_string(usbn_node, |
| 3619 | "refclk-type", &clock_type); |
| 3620 | |
| 3621 | if (!i && strcmp("crystal", clock_type) == 0) |
| 3622 | is_crystal_clock = true; |
| 3623 | |
| 3624 | if (is_crystal_clock) |
| 3625 | initialize_flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI; |
| 3626 | else |
| 3627 | initialize_flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND; |
| 3628 | |
| 3629 | res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 3630 | if (res_mem == NULL) { |
| 3631 | dev_err(dev, "found no memory resource\n"); |
| 3632 | return -ENXIO; |
| 3633 | } |
| 3634 | usb_num = (res_mem->start >> 44) & 1; |
| 3635 | |
| 3636 | if (irq < 0) { |
| 3637 | /* Defective device tree, but we know how to fix it. */ |
| 3638 | irq_hw_number_t hwirq = usb_num ? (1 << 6) + 17 : 56; |
Paul Davies C | f510643 | 2014-05-11 18:41:32 +0530 | [diff] [blame] | 3639 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3640 | irq = irq_create_mapping(NULL, hwirq); |
| 3641 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3642 | |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3643 | /* |
| 3644 | * Set the DMA mask to 64bits so we get buffers already translated for |
| 3645 | * DMA. |
| 3646 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3647 | dev->coherent_dma_mask = ~0; |
| 3648 | dev->dma_mask = &dev->coherent_dma_mask; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3649 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3650 | /* |
| 3651 | * Only cn52XX and cn56XX have DWC_OTG USB hardware and the |
| 3652 | * IOB priority registers. Under heavy network load USB |
| 3653 | * hardware can be starved by the IOB causing a crash. Give |
| 3654 | * it a priority boost if it has been waiting more than 400 |
| 3655 | * cycles to avoid this situation. |
| 3656 | * |
| 3657 | * Testing indicates that a cnt_val of 8192 is not sufficient, |
| 3658 | * but no failures are seen with 4096. We choose a value of |
| 3659 | * 400 to give a safety factor of 10. |
| 3660 | */ |
| 3661 | if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) { |
| 3662 | union cvmx_iob_n2c_l2c_pri_cnt pri_cnt; |
| 3663 | |
| 3664 | pri_cnt.u64 = 0; |
| 3665 | pri_cnt.s.cnt_enb = 1; |
| 3666 | pri_cnt.s.cnt_val = 400; |
| 3667 | cvmx_write_csr(CVMX_IOB_N2C_L2C_PRI_CNT, pri_cnt.u64); |
| 3668 | } |
| 3669 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3670 | hcd = usb_create_hcd(&octeon_hc_driver, dev, dev_name(dev)); |
| 3671 | if (!hcd) { |
| 3672 | dev_dbg(dev, "Failed to allocate memory for HCD\n"); |
| 3673 | return -1; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3674 | } |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3675 | hcd->uses_new_polling = 1; |
| 3676 | priv = (struct octeon_hcd *)hcd->hcd_priv; |
| 3677 | |
| 3678 | spin_lock_init(&priv->lock); |
| 3679 | |
Aaro Koskinen | b5e79e6 | 2015-03-22 17:37:53 +0200 | [diff] [blame] | 3680 | priv->usb.init_flags = initialize_flags; |
| 3681 | |
| 3682 | /* Initialize the USB state structure */ |
| 3683 | priv->usb.index = usb_num; |
| 3684 | INIT_LIST_HEAD(&priv->usb.idle_pipes); |
| 3685 | for (i = 0; i < ARRAY_SIZE(priv->usb.active_pipes); i++) |
| 3686 | INIT_LIST_HEAD(&priv->usb.active_pipes[i]); |
| 3687 | |
| 3688 | /* Due to an errata, CN31XX doesn't support DMA */ |
| 3689 | if (OCTEON_IS_MODEL(OCTEON_CN31XX)) { |
| 3690 | priv->usb.init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA; |
| 3691 | /* Only use one channel with non DMA */ |
| 3692 | priv->usb.idle_hardware_channels = 0x1; |
| 3693 | } else if (OCTEON_IS_MODEL(OCTEON_CN5XXX)) { |
| 3694 | /* CN5XXX have an errata with channel 3 */ |
| 3695 | priv->usb.idle_hardware_channels = 0xf7; |
| 3696 | } else { |
| 3697 | priv->usb.idle_hardware_channels = 0xff; |
| 3698 | } |
| 3699 | |
Aaro Koskinen | 6ad9c95 | 2015-03-22 17:38:01 +0200 | [diff] [blame] | 3700 | status = cvmx_usb_initialize(dev, &priv->usb); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3701 | if (status) { |
| 3702 | dev_dbg(dev, "USB initialization failed with %d\n", status); |
| 3703 | kfree(hcd); |
| 3704 | return -1; |
| 3705 | } |
| 3706 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3707 | status = usb_add_hcd(hcd, irq, 0); |
| 3708 | if (status) { |
| 3709 | dev_dbg(dev, "USB add HCD failed with %d\n", status); |
| 3710 | kfree(hcd); |
| 3711 | return -1; |
| 3712 | } |
| 3713 | device_wakeup_enable(hcd->self.controller); |
| 3714 | |
| 3715 | dev_info(dev, "Registered HCD for port %d on irq %d\n", usb_num, irq); |
| 3716 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3717 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3718 | } |
| 3719 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3720 | static int octeon_usb_remove(struct platform_device *pdev) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3721 | { |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3722 | int status; |
| 3723 | struct device *dev = &pdev->dev; |
| 3724 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 3725 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 3726 | unsigned long flags; |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3727 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3728 | usb_remove_hcd(hcd); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3729 | spin_lock_irqsave(&priv->lock, flags); |
| 3730 | status = cvmx_usb_shutdown(&priv->usb); |
| 3731 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3732 | if (status) |
| 3733 | dev_dbg(dev, "USB shutdown failed with %d\n", status); |
| 3734 | |
| 3735 | kfree(hcd); |
| 3736 | |
| 3737 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3738 | } |
| 3739 | |
Fabian Frederick | 8779457 | 2015-03-16 20:59:08 +0100 | [diff] [blame] | 3740 | static const struct of_device_id octeon_usb_match[] = { |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3741 | { |
| 3742 | .compatible = "cavium,octeon-5750-usbc", |
| 3743 | }, |
| 3744 | {}, |
| 3745 | }; |
Luis de Bethencourt | 1972308b | 2015-09-03 13:13:51 +0200 | [diff] [blame] | 3746 | MODULE_DEVICE_TABLE(of, octeon_usb_match); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3747 | |
| 3748 | static struct platform_driver octeon_usb_driver = { |
| 3749 | .driver = { |
| 3750 | .name = "OcteonUSB", |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3751 | .of_match_table = octeon_usb_match, |
| 3752 | }, |
| 3753 | .probe = octeon_usb_probe, |
| 3754 | .remove = octeon_usb_remove, |
| 3755 | }; |
| 3756 | |
| 3757 | static int __init octeon_usb_driver_init(void) |
| 3758 | { |
| 3759 | if (usb_disabled()) |
| 3760 | return 0; |
| 3761 | |
| 3762 | return platform_driver_register(&octeon_usb_driver); |
| 3763 | } |
| 3764 | module_init(octeon_usb_driver_init); |
| 3765 | |
| 3766 | static void __exit octeon_usb_driver_exit(void) |
| 3767 | { |
| 3768 | if (usb_disabled()) |
| 3769 | return; |
| 3770 | |
| 3771 | platform_driver_unregister(&octeon_usb_driver); |
| 3772 | } |
| 3773 | module_exit(octeon_usb_driver_exit); |
| 3774 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3775 | MODULE_LICENSE("GPL"); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3776 | MODULE_AUTHOR("Cavium, Inc. <support@cavium.com>"); |
| 3777 | MODULE_DESCRIPTION("Cavium Inc. OCTEON USB Host driver."); |