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> |
| 50 | #include <linux/interrupt.h> |
| 51 | #include <linux/platform_device.h> |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 52 | #include <linux/usb.h> |
| 53 | |
Aaro Koskinen | 2a81d2b | 2013-06-13 01:00:35 +0300 | [diff] [blame] | 54 | #include <linux/time.h> |
| 55 | #include <linux/delay.h> |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 56 | |
| 57 | #include <asm/octeon/cvmx.h> |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 58 | #include <asm/octeon/cvmx-iob-defs.h> |
| 59 | |
| 60 | #include <linux/usb/hcd.h> |
| 61 | |
Devendra Naga | 55fa328 | 2013-06-04 02:46:20 +0530 | [diff] [blame] | 62 | #include <linux/err.h> |
| 63 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 64 | #include <asm/octeon/octeon.h> |
| 65 | #include <asm/octeon/cvmx-helper.h> |
| 66 | #include <asm/octeon/cvmx-sysinfo.h> |
| 67 | #include <asm/octeon/cvmx-helper-board.h> |
| 68 | |
Aaro Koskinen | f121910 | 2013-10-10 23:25:30 +0300 | [diff] [blame] | 69 | #include "octeon-hcd.h" |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 70 | |
| 71 | /** |
| 72 | * enum cvmx_usb_speed - the possible USB device speeds |
| 73 | * |
| 74 | * @CVMX_USB_SPEED_HIGH: Device is operation at 480Mbps |
| 75 | * @CVMX_USB_SPEED_FULL: Device is operation at 12Mbps |
| 76 | * @CVMX_USB_SPEED_LOW: Device is operation at 1.5Mbps |
| 77 | */ |
| 78 | enum cvmx_usb_speed { |
| 79 | CVMX_USB_SPEED_HIGH = 0, |
| 80 | CVMX_USB_SPEED_FULL = 1, |
| 81 | CVMX_USB_SPEED_LOW = 2, |
| 82 | }; |
| 83 | |
| 84 | /** |
| 85 | * enum cvmx_usb_transfer - the possible USB transfer types |
| 86 | * |
| 87 | * @CVMX_USB_TRANSFER_CONTROL: USB transfer type control for hub and status |
| 88 | * transfers |
| 89 | * @CVMX_USB_TRANSFER_ISOCHRONOUS: USB transfer type isochronous for low |
| 90 | * priority periodic transfers |
| 91 | * @CVMX_USB_TRANSFER_BULK: USB transfer type bulk for large low priority |
| 92 | * transfers |
| 93 | * @CVMX_USB_TRANSFER_INTERRUPT: USB transfer type interrupt for high priority |
| 94 | * periodic transfers |
| 95 | */ |
| 96 | enum cvmx_usb_transfer { |
| 97 | CVMX_USB_TRANSFER_CONTROL = 0, |
| 98 | CVMX_USB_TRANSFER_ISOCHRONOUS = 1, |
| 99 | CVMX_USB_TRANSFER_BULK = 2, |
| 100 | CVMX_USB_TRANSFER_INTERRUPT = 3, |
| 101 | }; |
| 102 | |
| 103 | /** |
| 104 | * enum cvmx_usb_direction - the transfer directions |
| 105 | * |
| 106 | * @CVMX_USB_DIRECTION_OUT: Data is transferring from Octeon to the device/host |
| 107 | * @CVMX_USB_DIRECTION_IN: Data is transferring from the device/host to Octeon |
| 108 | */ |
| 109 | enum cvmx_usb_direction { |
| 110 | CVMX_USB_DIRECTION_OUT, |
| 111 | CVMX_USB_DIRECTION_IN, |
| 112 | }; |
| 113 | |
| 114 | /** |
| 115 | * enum cvmx_usb_complete - possible callback function status codes |
| 116 | * |
| 117 | * @CVMX_USB_COMPLETE_SUCCESS: The transaction / operation finished without |
| 118 | * any errors |
| 119 | * @CVMX_USB_COMPLETE_SHORT: FIXME: This is currently not implemented |
| 120 | * @CVMX_USB_COMPLETE_CANCEL: The transaction was canceled while in flight |
| 121 | * by a user call to cvmx_usb_cancel |
| 122 | * @CVMX_USB_COMPLETE_ERROR: The transaction aborted with an unexpected |
| 123 | * error status |
| 124 | * @CVMX_USB_COMPLETE_STALL: The transaction received a USB STALL response |
| 125 | * from the device |
| 126 | * @CVMX_USB_COMPLETE_XACTERR: The transaction failed with an error from the |
| 127 | * device even after a number of retries |
| 128 | * @CVMX_USB_COMPLETE_DATATGLERR: The transaction failed with a data toggle |
| 129 | * error even after a number of retries |
| 130 | * @CVMX_USB_COMPLETE_BABBLEERR: The transaction failed with a babble error |
| 131 | * @CVMX_USB_COMPLETE_FRAMEERR: The transaction failed with a frame error |
| 132 | * even after a number of retries |
| 133 | */ |
| 134 | enum cvmx_usb_complete { |
| 135 | CVMX_USB_COMPLETE_SUCCESS, |
| 136 | CVMX_USB_COMPLETE_SHORT, |
| 137 | CVMX_USB_COMPLETE_CANCEL, |
| 138 | CVMX_USB_COMPLETE_ERROR, |
| 139 | CVMX_USB_COMPLETE_STALL, |
| 140 | CVMX_USB_COMPLETE_XACTERR, |
| 141 | CVMX_USB_COMPLETE_DATATGLERR, |
| 142 | CVMX_USB_COMPLETE_BABBLEERR, |
| 143 | CVMX_USB_COMPLETE_FRAMEERR, |
| 144 | }; |
| 145 | |
| 146 | /** |
| 147 | * struct cvmx_usb_port_status - the USB port status information |
| 148 | * |
| 149 | * @port_enabled: 1 = Usb port is enabled, 0 = disabled |
| 150 | * @port_over_current: 1 = Over current detected, 0 = Over current not |
| 151 | * detected. Octeon doesn't support over current detection. |
| 152 | * @port_powered: 1 = Port power is being supplied to the device, 0 = |
| 153 | * power is off. Octeon doesn't support turning port power |
| 154 | * off. |
| 155 | * @port_speed: Current port speed. |
| 156 | * @connected: 1 = A device is connected to the port, 0 = No device is |
| 157 | * connected. |
| 158 | * @connect_change: 1 = Device connected state changed since the last set |
| 159 | * status call. |
| 160 | */ |
| 161 | struct cvmx_usb_port_status { |
| 162 | uint32_t reserved : 25; |
| 163 | uint32_t port_enabled : 1; |
| 164 | uint32_t port_over_current : 1; |
| 165 | uint32_t port_powered : 1; |
| 166 | enum cvmx_usb_speed port_speed : 2; |
| 167 | uint32_t connected : 1; |
| 168 | uint32_t connect_change : 1; |
| 169 | }; |
| 170 | |
| 171 | /** |
| 172 | * union cvmx_usb_control_header - the structure of a Control packet header |
| 173 | * |
| 174 | * @s.request_type: Bit 7 tells the direction: 1=IN, 0=OUT |
| 175 | * @s.request The standard usb request to make |
| 176 | * @s.value Value parameter for the request in little endian format |
| 177 | * @s.index Index for the request in little endian format |
| 178 | * @s.length Length of the data associated with this request in |
| 179 | * little endian format |
| 180 | */ |
| 181 | union cvmx_usb_control_header { |
| 182 | uint64_t u64; |
| 183 | struct { |
| 184 | uint64_t request_type : 8; |
| 185 | uint64_t request : 8; |
| 186 | uint64_t value : 16; |
| 187 | uint64_t index : 16; |
| 188 | uint64_t length : 16; |
| 189 | } s; |
| 190 | }; |
| 191 | |
| 192 | /** |
| 193 | * struct cvmx_usb_iso_packet - descriptor for Isochronous packets |
| 194 | * |
| 195 | * @offset: This is the offset in bytes into the main buffer where this data |
| 196 | * is stored. |
| 197 | * @length: This is the length in bytes of the data. |
| 198 | * @status: This is the status of this individual packet transfer. |
| 199 | */ |
| 200 | struct cvmx_usb_iso_packet { |
| 201 | int offset; |
| 202 | int length; |
| 203 | enum cvmx_usb_complete status; |
| 204 | }; |
| 205 | |
| 206 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 207 | * enum cvmx_usb_initialize_flags - flags used by the initialization function |
| 208 | * |
| 209 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI: The USB port uses a 12MHz crystal |
| 210 | * as clock source at USB_XO and |
| 211 | * USB_XI. |
| 212 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND: The USB port uses 12/24/48MHz 2.5V |
| 213 | * board clock source at USB_XO. |
| 214 | * USB_XI should be tied to GND. |
| 215 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK: Mask for clock speed field |
| 216 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: Speed of reference clock or |
| 217 | * crystal |
| 218 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: Speed of reference clock |
| 219 | * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: Speed of reference clock |
| 220 | * @CVMX_USB_INITIALIZE_FLAGS_NO_DMA: Disable DMA and used polled IO for |
| 221 | * data transfer use for the USB |
| 222 | */ |
| 223 | enum cvmx_usb_initialize_flags { |
| 224 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI = 1 << 0, |
| 225 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND = 1 << 1, |
| 226 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK = 3 << 3, |
| 227 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ = 1 << 3, |
| 228 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ = 2 << 3, |
| 229 | CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ = 3 << 3, |
| 230 | /* Bits 3-4 used to encode the clock frequency */ |
| 231 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA = 1 << 5, |
| 232 | }; |
| 233 | |
| 234 | /** |
| 235 | * enum cvmx_usb_pipe_flags - internal flags for a pipe. |
| 236 | * |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 237 | * @__CVMX_USB_PIPE_FLAGS_SCHEDULED: Used internally to determine if a pipe is |
| 238 | * actively using hardware. Do not use. |
| 239 | * @__CVMX_USB_PIPE_FLAGS_NEED_PING: Used internally to determine if a high |
| 240 | * speed pipe is in the ping state. Do not |
| 241 | * use. |
| 242 | */ |
| 243 | enum cvmx_usb_pipe_flags { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 244 | __CVMX_USB_PIPE_FLAGS_SCHEDULED = 1 << 17, |
| 245 | __CVMX_USB_PIPE_FLAGS_NEED_PING = 1 << 18, |
| 246 | }; |
| 247 | |
| 248 | /* Normal prefetch that use the pref instruction. */ |
| 249 | #define CVMX_PREFETCH(address, offset) asm volatile ("pref %[type], %[off](%[rbase])" : : [rbase] "d" (address), [off] "I" (offset), [type] "n" (0)) |
| 250 | |
| 251 | /* Maximum number of times to retry failed transactions */ |
| 252 | #define MAX_RETRIES 3 |
| 253 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 254 | /* Maximum number of hardware channels supported by the USB block */ |
| 255 | #define MAX_CHANNELS 8 |
| 256 | |
| 257 | /* The highest valid USB device address */ |
| 258 | #define MAX_USB_ADDRESS 127 |
| 259 | |
| 260 | /* The highest valid USB endpoint number */ |
| 261 | #define MAX_USB_ENDPOINT 15 |
| 262 | |
| 263 | /* The highest valid port number on a hub */ |
| 264 | #define MAX_USB_HUB_PORT 15 |
| 265 | |
| 266 | /* |
| 267 | * The low level hardware can transfer a maximum of this number of bytes in each |
| 268 | * transfer. The field is 19 bits wide |
| 269 | */ |
| 270 | #define MAX_TRANSFER_BYTES ((1<<19)-1) |
| 271 | |
| 272 | /* |
| 273 | * The low level hardware can transfer a maximum of this number of packets in |
| 274 | * each transfer. The field is 10 bits wide |
| 275 | */ |
| 276 | #define MAX_TRANSFER_PACKETS ((1<<10)-1) |
| 277 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 278 | /** |
| 279 | * Logical transactions may take numerous low level |
| 280 | * transactions, especially when splits are concerned. This |
| 281 | * enum represents all of the possible stages a transaction can |
| 282 | * be in. Note that split completes are always even. This is so |
| 283 | * the NAK handler can backup to the previous low level |
| 284 | * transaction with a simple clearing of bit 0. |
| 285 | */ |
| 286 | enum cvmx_usb_stage { |
| 287 | CVMX_USB_STAGE_NON_CONTROL, |
| 288 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE, |
| 289 | CVMX_USB_STAGE_SETUP, |
| 290 | CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE, |
| 291 | CVMX_USB_STAGE_DATA, |
| 292 | CVMX_USB_STAGE_DATA_SPLIT_COMPLETE, |
| 293 | CVMX_USB_STAGE_STATUS, |
| 294 | CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE, |
| 295 | }; |
| 296 | |
| 297 | /** |
| 298 | * struct cvmx_usb_transaction - describes each pending USB transaction |
| 299 | * regardless of type. These are linked together |
| 300 | * to form a list of pending requests for a pipe. |
| 301 | * |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 302 | * @node: List node for transactions in the pipe. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 303 | * @type: Type of transaction, duplicated of the pipe. |
| 304 | * @flags: State flags for this transaction. |
| 305 | * @buffer: User's physical buffer address to read/write. |
| 306 | * @buffer_length: Size of the user's buffer in bytes. |
| 307 | * @control_header: For control transactions, physical address of the 8 |
| 308 | * byte standard header. |
| 309 | * @iso_start_frame: For ISO transactions, the starting frame number. |
| 310 | * @iso_number_packets: For ISO transactions, the number of packets in the |
| 311 | * request. |
| 312 | * @iso_packets: For ISO transactions, the sub packets in the request. |
| 313 | * @actual_bytes: Actual bytes transfer for this transaction. |
| 314 | * @stage: For control transactions, the current stage. |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 315 | * @urb: URB. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 316 | */ |
| 317 | struct cvmx_usb_transaction { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 318 | struct list_head node; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 319 | enum cvmx_usb_transfer type; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 320 | uint64_t buffer; |
| 321 | int buffer_length; |
| 322 | uint64_t control_header; |
| 323 | int iso_start_frame; |
| 324 | int iso_number_packets; |
| 325 | struct cvmx_usb_iso_packet *iso_packets; |
| 326 | int xfersize; |
| 327 | int pktcnt; |
| 328 | int retries; |
| 329 | int actual_bytes; |
| 330 | enum cvmx_usb_stage stage; |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 331 | struct urb *urb; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 332 | }; |
| 333 | |
| 334 | /** |
| 335 | * struct cvmx_usb_pipe - a pipe represents a virtual connection between Octeon |
| 336 | * and some USB device. It contains a list of pending |
| 337 | * request to the device. |
| 338 | * |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 339 | * @node: List node for pipe list |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 340 | * @next: Pipe after this one in the list |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 341 | * @transactions: List of pending transactions |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 342 | * @interval: For periodic pipes, the interval between packets in |
| 343 | * frames |
| 344 | * @next_tx_frame: The next frame this pipe is allowed to transmit on |
| 345 | * @flags: State flags for this pipe |
| 346 | * @device_speed: Speed of device connected to this pipe |
| 347 | * @transfer_type: Type of transaction supported by this pipe |
| 348 | * @transfer_dir: IN or OUT. Ignored for Control |
| 349 | * @multi_count: Max packet in a row for the device |
| 350 | * @max_packet: The device's maximum packet size in bytes |
| 351 | * @device_addr: USB device address at other end of pipe |
| 352 | * @endpoint_num: USB endpoint number at other end of pipe |
| 353 | * @hub_device_addr: Hub address this device is connected to |
| 354 | * @hub_port: Hub port this device is connected to |
| 355 | * @pid_toggle: This toggles between 0/1 on every packet send to track |
| 356 | * the data pid needed |
| 357 | * @channel: Hardware DMA channel for this pipe |
| 358 | * @split_sc_frame: The low order bits of the frame number the split |
| 359 | * complete should be sent on |
| 360 | */ |
| 361 | struct cvmx_usb_pipe { |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 362 | struct list_head node; |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 363 | struct list_head transactions; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 364 | uint64_t interval; |
| 365 | uint64_t next_tx_frame; |
| 366 | enum cvmx_usb_pipe_flags flags; |
| 367 | enum cvmx_usb_speed device_speed; |
| 368 | enum cvmx_usb_transfer transfer_type; |
| 369 | enum cvmx_usb_direction transfer_dir; |
| 370 | int multi_count; |
| 371 | uint16_t max_packet; |
| 372 | uint8_t device_addr; |
| 373 | uint8_t endpoint_num; |
| 374 | uint8_t hub_device_addr; |
| 375 | uint8_t hub_port; |
| 376 | uint8_t pid_toggle; |
| 377 | uint8_t channel; |
| 378 | int8_t split_sc_frame; |
| 379 | }; |
| 380 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 381 | struct cvmx_usb_tx_fifo { |
| 382 | struct { |
| 383 | int channel; |
| 384 | int size; |
| 385 | uint64_t address; |
| 386 | } entry[MAX_CHANNELS+1]; |
| 387 | int head; |
| 388 | int tail; |
| 389 | }; |
| 390 | |
| 391 | /** |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 392 | * struct cvmx_usb_state - the state of the USB block |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 393 | * |
| 394 | * init_flags: Flags passed to initialize. |
| 395 | * index: Which USB block this is for. |
| 396 | * idle_hardware_channels: Bit set for every idle hardware channel. |
| 397 | * usbcx_hprt: Stored port status so we don't need to read a CSR to |
| 398 | * determine splits. |
| 399 | * pipe_for_channel: Map channels to pipes. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 400 | * pipe: Storage for pipes. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 401 | * indent: Used by debug output to indent functions. |
| 402 | * port_status: Last port status used for change notification. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 403 | * idle_pipes: List of open pipes that have no transactions. |
| 404 | * active_pipes: Active pipes indexed by transfer type. |
| 405 | * frame_number: Increments every SOF interrupt for time keeping. |
| 406 | * active_split: Points to the current active split, or NULL. |
| 407 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 408 | struct cvmx_usb_state { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 409 | int init_flags; |
| 410 | int index; |
| 411 | int idle_hardware_channels; |
| 412 | union cvmx_usbcx_hprt usbcx_hprt; |
| 413 | struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS]; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 414 | int indent; |
| 415 | struct cvmx_usb_port_status port_status; |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 416 | struct list_head idle_pipes; |
| 417 | struct list_head active_pipes[4]; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 418 | uint64_t frame_number; |
| 419 | struct cvmx_usb_transaction *active_split; |
| 420 | struct cvmx_usb_tx_fifo periodic; |
| 421 | struct cvmx_usb_tx_fifo nonperiodic; |
| 422 | }; |
| 423 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 424 | struct octeon_hcd { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 425 | spinlock_t lock; |
Aaro Koskinen | a24ed35 | 2013-07-30 23:43:05 +0300 | [diff] [blame] | 426 | struct cvmx_usb_state usb; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 427 | struct tasklet_struct dequeue_tasklet; |
| 428 | struct list_head dequeue_list; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 429 | }; |
| 430 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 431 | /* This macro spins on a field waiting for it to reach a value */ |
| 432 | #define CVMX_WAIT_FOR_FIELD32(address, type, field, op, value, timeout_usec)\ |
| 433 | ({int result; \ |
| 434 | do { \ |
| 435 | uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \ |
| 436 | octeon_get_clock_rate() / 1000000; \ |
| 437 | type c; \ |
| 438 | while (1) { \ |
| 439 | c.u32 = __cvmx_usb_read_csr32(usb, address); \ |
| 440 | if (c.s.field op (value)) { \ |
| 441 | result = 0; \ |
| 442 | break; \ |
| 443 | } else if (cvmx_get_cycle() > done) { \ |
| 444 | result = -1; \ |
| 445 | break; \ |
| 446 | } else \ |
| 447 | cvmx_wait(100); \ |
| 448 | } \ |
| 449 | } while (0); \ |
| 450 | result; }) |
| 451 | |
| 452 | /* |
| 453 | * This macro logically sets a single field in a CSR. It does the sequence |
| 454 | * read, modify, and write |
| 455 | */ |
| 456 | #define USB_SET_FIELD32(address, type, field, value) \ |
| 457 | do { \ |
| 458 | type c; \ |
| 459 | c.u32 = __cvmx_usb_read_csr32(usb, address); \ |
| 460 | c.s.field = value; \ |
| 461 | __cvmx_usb_write_csr32(usb, address, c.u32); \ |
| 462 | } while (0) |
| 463 | |
| 464 | /* Returns the IO address to push/pop stuff data from the FIFOs */ |
| 465 | #define USB_FIFO_ADDRESS(channel, usb_index) (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000) |
| 466 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 467 | /** |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 468 | * struct octeon_temp_buffer - a bounce buffer for USB transfers |
| 469 | * @temp_buffer: the newly allocated temporary buffer (including meta-data) |
| 470 | * @orig_buffer: the original buffer passed by the USB stack |
| 471 | * @data: the newly allocated temporary buffer (excluding meta-data) |
| 472 | * |
| 473 | * Both the DMA engine and FIFO mode will always transfer full 32-bit words. If |
| 474 | * the buffer is too short, we need to allocate a temporary one, and this struct |
| 475 | * represents it. |
| 476 | */ |
| 477 | struct octeon_temp_buffer { |
| 478 | void *temp_buffer; |
| 479 | void *orig_buffer; |
| 480 | u8 data[0]; |
| 481 | }; |
| 482 | |
| 483 | /** |
| 484 | * octeon_alloc_temp_buffer - allocate a temporary buffer for USB transfer |
| 485 | * (if needed) |
| 486 | * @urb: URB. |
| 487 | * @mem_flags: Memory allocation flags. |
| 488 | * |
| 489 | * This function allocates a temporary bounce buffer whenever it's needed |
| 490 | * due to HW limitations. |
| 491 | */ |
| 492 | static int octeon_alloc_temp_buffer(struct urb *urb, gfp_t mem_flags) |
| 493 | { |
| 494 | struct octeon_temp_buffer *temp; |
| 495 | |
| 496 | if (urb->num_sgs || urb->sg || |
| 497 | (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) || |
| 498 | !(urb->transfer_buffer_length % sizeof(u32))) |
| 499 | return 0; |
| 500 | |
| 501 | temp = kmalloc(ALIGN(urb->transfer_buffer_length, sizeof(u32)) + |
| 502 | sizeof(*temp), mem_flags); |
| 503 | if (!temp) |
| 504 | return -ENOMEM; |
| 505 | |
| 506 | temp->temp_buffer = temp; |
| 507 | temp->orig_buffer = urb->transfer_buffer; |
| 508 | if (usb_urb_dir_out(urb)) |
| 509 | memcpy(temp->data, urb->transfer_buffer, |
| 510 | urb->transfer_buffer_length); |
| 511 | urb->transfer_buffer = temp->data; |
| 512 | urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER; |
| 513 | |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * octeon_free_temp_buffer - free a temporary buffer used by USB transfers. |
| 519 | * @urb: URB. |
| 520 | * |
| 521 | * Frees a buffer allocated by octeon_alloc_temp_buffer(). |
| 522 | */ |
| 523 | static void octeon_free_temp_buffer(struct urb *urb) |
| 524 | { |
| 525 | struct octeon_temp_buffer *temp; |
| 526 | |
| 527 | if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER)) |
| 528 | return; |
| 529 | |
| 530 | temp = container_of(urb->transfer_buffer, struct octeon_temp_buffer, |
| 531 | data); |
| 532 | if (usb_urb_dir_in(urb)) |
| 533 | memcpy(temp->orig_buffer, urb->transfer_buffer, |
| 534 | urb->actual_length); |
| 535 | urb->transfer_buffer = temp->orig_buffer; |
| 536 | urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER; |
| 537 | kfree(temp->temp_buffer); |
| 538 | } |
| 539 | |
| 540 | /** |
| 541 | * octeon_map_urb_for_dma - Octeon-specific map_urb_for_dma(). |
| 542 | * @hcd: USB HCD structure. |
| 543 | * @urb: URB. |
| 544 | * @mem_flags: Memory allocation flags. |
| 545 | */ |
| 546 | static int octeon_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
| 547 | gfp_t mem_flags) |
| 548 | { |
| 549 | int ret; |
| 550 | |
| 551 | ret = octeon_alloc_temp_buffer(urb, mem_flags); |
| 552 | if (ret) |
| 553 | return ret; |
| 554 | |
| 555 | ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); |
| 556 | if (ret) |
| 557 | octeon_free_temp_buffer(urb); |
| 558 | |
| 559 | return ret; |
| 560 | } |
| 561 | |
| 562 | /** |
| 563 | * octeon_unmap_urb_for_dma - Octeon-specific unmap_urb_for_dma() |
| 564 | * @hcd: USB HCD structure. |
| 565 | * @urb: URB. |
| 566 | */ |
| 567 | static void octeon_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
| 568 | { |
| 569 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
| 570 | octeon_free_temp_buffer(urb); |
| 571 | } |
| 572 | |
| 573 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 574 | * Read a USB 32bit CSR. It performs the necessary address swizzle |
| 575 | * for 32bit CSRs and logs the value in a readable format if |
| 576 | * debugging is on. |
| 577 | * |
| 578 | * @usb: USB block this access is for |
| 579 | * @address: 64bit address to read |
| 580 | * |
| 581 | * Returns: Result of the read |
| 582 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 583 | static inline uint32_t __cvmx_usb_read_csr32(struct cvmx_usb_state *usb, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 584 | uint64_t address) |
| 585 | { |
| 586 | uint32_t result = cvmx_read64_uint32(address ^ 4); |
| 587 | return result; |
| 588 | } |
| 589 | |
| 590 | |
| 591 | /** |
| 592 | * Write a USB 32bit CSR. It performs the necessary address |
| 593 | * swizzle for 32bit CSRs and logs the value in a readable format |
| 594 | * if debugging is on. |
| 595 | * |
| 596 | * @usb: USB block this access is for |
| 597 | * @address: 64bit address to write |
| 598 | * @value: Value to write |
| 599 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 600 | static inline void __cvmx_usb_write_csr32(struct cvmx_usb_state *usb, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 601 | uint64_t address, uint32_t value) |
| 602 | { |
| 603 | cvmx_write64_uint32(address ^ 4, value); |
| 604 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); |
| 605 | } |
| 606 | |
| 607 | |
| 608 | /** |
| 609 | * Read a USB 64bit CSR. It logs the value in a readable format if |
| 610 | * debugging is on. |
| 611 | * |
| 612 | * @usb: USB block this access is for |
| 613 | * @address: 64bit address to read |
| 614 | * |
| 615 | * Returns: Result of the read |
| 616 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 617 | static inline uint64_t __cvmx_usb_read_csr64(struct cvmx_usb_state *usb, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 618 | uint64_t address) |
| 619 | { |
| 620 | uint64_t result = cvmx_read64_uint64(address); |
| 621 | return result; |
| 622 | } |
| 623 | |
| 624 | |
| 625 | /** |
| 626 | * Write a USB 64bit CSR. It logs the value in a readable format |
| 627 | * if debugging is on. |
| 628 | * |
| 629 | * @usb: USB block this access is for |
| 630 | * @address: 64bit address to write |
| 631 | * @value: Value to write |
| 632 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 633 | static inline void __cvmx_usb_write_csr64(struct cvmx_usb_state *usb, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 634 | uint64_t address, uint64_t value) |
| 635 | { |
| 636 | cvmx_write64_uint64(address, value); |
| 637 | } |
| 638 | |
| 639 | /** |
| 640 | * Return non zero if this pipe connects to a non HIGH speed |
| 641 | * device through a high speed hub. |
| 642 | * |
| 643 | * @usb: USB block this access is for |
| 644 | * @pipe: Pipe to check |
| 645 | * |
| 646 | * Returns: Non zero if we need to do split transactions |
| 647 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 648 | static inline int __cvmx_usb_pipe_needs_split(struct cvmx_usb_state *usb, |
| 649 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 650 | { |
Aaro Koskinen | aa87afe | 2013-10-06 22:22:37 +0300 | [diff] [blame] | 651 | return pipe->device_speed != CVMX_USB_SPEED_HIGH && |
| 652 | usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 653 | } |
| 654 | |
| 655 | |
| 656 | /** |
| 657 | * Trivial utility function to return the correct PID for a pipe |
| 658 | * |
| 659 | * @pipe: pipe to check |
| 660 | * |
| 661 | * Returns: PID for pipe |
| 662 | */ |
| 663 | static inline int __cvmx_usb_get_data_pid(struct cvmx_usb_pipe *pipe) |
| 664 | { |
| 665 | if (pipe->pid_toggle) |
| 666 | return 2; /* Data1 */ |
| 667 | else |
| 668 | return 0; /* Data0 */ |
| 669 | } |
| 670 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 671 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 672 | * Initialize a USB port for use. This must be called before any |
| 673 | * other access to the Octeon USB port is made. The port starts |
| 674 | * off in the disabled state. |
| 675 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 676 | * @usb: Pointer to an empty struct cvmx_usb_state |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 677 | * that will be populated by the initialize call. |
| 678 | * This structure is then passed to all other USB |
| 679 | * functions. |
| 680 | * @usb_port_number: |
| 681 | * Which Octeon USB port to initialize. |
| 682 | * |
| 683 | * Returns: 0 or a negative error code. |
| 684 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 685 | static int cvmx_usb_initialize(struct cvmx_usb_state *usb, |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 686 | int usb_port_number, |
| 687 | enum cvmx_usb_initialize_flags flags) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 688 | { |
| 689 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; |
| 690 | union cvmx_usbnx_usbp_ctl_status usbn_usbp_ctl_status; |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 691 | int i; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 692 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 693 | /* At first allow 0-1 for the usb port number */ |
| 694 | if ((usb_port_number < 0) || (usb_port_number > 1)) |
| 695 | return -EINVAL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 696 | |
| 697 | memset(usb, 0, sizeof(*usb)); |
| 698 | usb->init_flags = flags; |
| 699 | |
| 700 | /* Initialize the USB state structure */ |
Aaro Koskinen | d2695a8 | 2013-10-10 23:25:32 +0300 | [diff] [blame] | 701 | usb->index = usb_port_number; |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 702 | INIT_LIST_HEAD(&usb->idle_pipes); |
| 703 | for (i = 0; i < ARRAY_SIZE(usb->active_pipes); i++) |
| 704 | INIT_LIST_HEAD(&usb->active_pipes[i]); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 705 | |
| 706 | /* |
| 707 | * Power On Reset and PHY Initialization |
| 708 | * |
| 709 | * 1. Wait for DCOK to assert (nothing to do) |
| 710 | * |
| 711 | * 2a. Write USBN0/1_CLK_CTL[POR] = 1 and |
| 712 | * USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 |
| 713 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 714 | usbn_clk_ctl.u64 = |
| 715 | __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 716 | usbn_clk_ctl.s.por = 1; |
| 717 | usbn_clk_ctl.s.hrst = 0; |
| 718 | usbn_clk_ctl.s.prst = 0; |
| 719 | usbn_clk_ctl.s.hclk_rst = 0; |
| 720 | usbn_clk_ctl.s.enable = 0; |
| 721 | /* |
| 722 | * 2b. Select the USB reference clock/crystal parameters by writing |
| 723 | * appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] |
| 724 | */ |
| 725 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) { |
| 726 | /* |
| 727 | * The USB port uses 12/24/48MHz 2.5V board clock |
| 728 | * source at USB_XO. USB_XI should be tied to GND. |
| 729 | * Most Octeon evaluation boards require this setting |
| 730 | */ |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 731 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || |
| 732 | OCTEON_IS_MODEL(OCTEON_CN56XX) || |
| 733 | OCTEON_IS_MODEL(OCTEON_CN50XX)) |
| 734 | /* From CN56XX,CN50XX,CN31XX,CN30XX manuals */ |
| 735 | 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] | 736 | else |
| 737 | /* From CN52XX manual */ |
Aaro Koskinen | 34b70b9 | 2013-10-10 23:25:28 +0300 | [diff] [blame] | 738 | usbn_clk_ctl.s.p_rtype = 1; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 739 | |
| 740 | switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) { |
| 741 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: |
| 742 | usbn_clk_ctl.s.p_c_sel = 0; |
| 743 | break; |
| 744 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: |
| 745 | usbn_clk_ctl.s.p_c_sel = 1; |
| 746 | break; |
| 747 | case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: |
| 748 | usbn_clk_ctl.s.p_c_sel = 2; |
| 749 | break; |
| 750 | } |
| 751 | } else { |
| 752 | /* |
| 753 | * The USB port uses a 12MHz crystal as clock source |
| 754 | * at USB_XO and USB_XI |
| 755 | */ |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 756 | if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 757 | /* From CN31XX,CN30XX manual */ |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 758 | 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] | 759 | else |
Aaro Koskinen | 7d7bc26 | 2013-10-10 23:25:29 +0300 | [diff] [blame] | 760 | /* From CN56XX,CN52XX,CN50XX manuals. */ |
Aaro Koskinen | 34b70b9 | 2013-10-10 23:25:28 +0300 | [diff] [blame] | 761 | usbn_clk_ctl.s.p_rtype = 0; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 762 | |
| 763 | usbn_clk_ctl.s.p_c_sel = 0; |
| 764 | } |
| 765 | /* |
| 766 | * 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and |
| 767 | * setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down |
| 768 | * such that USB is as close as possible to 125Mhz |
| 769 | */ |
| 770 | { |
| 771 | int divisor = (octeon_get_clock_rate()+125000000-1)/125000000; |
| 772 | /* Lower than 4 doesn't seem to work properly */ |
| 773 | if (divisor < 4) |
| 774 | divisor = 4; |
| 775 | usbn_clk_ctl.s.divide = divisor; |
| 776 | usbn_clk_ctl.s.divide2 = 0; |
| 777 | } |
| 778 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), |
| 779 | usbn_clk_ctl.u64); |
| 780 | /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */ |
| 781 | usbn_clk_ctl.s.hclk_rst = 1; |
| 782 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), |
| 783 | usbn_clk_ctl.u64); |
| 784 | /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */ |
| 785 | cvmx_wait(64); |
| 786 | /* |
| 787 | * 3. Program the power-on reset field in the USBN clock-control |
| 788 | * register: |
| 789 | * USBN_CLK_CTL[POR] = 0 |
| 790 | */ |
| 791 | usbn_clk_ctl.s.por = 0; |
| 792 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), |
| 793 | usbn_clk_ctl.u64); |
| 794 | /* 4. Wait 1 ms for PHY clock to start */ |
| 795 | mdelay(1); |
| 796 | /* |
| 797 | * 5. Program the Reset input from automatic test equipment field in the |
| 798 | * USBP control and status register: |
| 799 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 1 |
| 800 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 801 | usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, |
| 802 | CVMX_USBNX_USBP_CTL_STATUS(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 803 | usbn_usbp_ctl_status.s.ate_reset = 1; |
| 804 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), |
| 805 | usbn_usbp_ctl_status.u64); |
| 806 | /* 6. Wait 10 cycles */ |
| 807 | cvmx_wait(10); |
| 808 | /* |
| 809 | * 7. Clear ATE_RESET field in the USBN clock-control register: |
| 810 | * USBN_USBP_CTL_STATUS[ATE_RESET] = 0 |
| 811 | */ |
| 812 | usbn_usbp_ctl_status.s.ate_reset = 0; |
| 813 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), |
| 814 | usbn_usbp_ctl_status.u64); |
| 815 | /* |
| 816 | * 8. Program the PHY reset field in the USBN clock-control register: |
| 817 | * USBN_CLK_CTL[PRST] = 1 |
| 818 | */ |
| 819 | usbn_clk_ctl.s.prst = 1; |
| 820 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), |
| 821 | usbn_clk_ctl.u64); |
| 822 | /* |
| 823 | * 9. Program the USBP control and status register to select host or |
| 824 | * device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for |
| 825 | * device |
| 826 | */ |
| 827 | usbn_usbp_ctl_status.s.hst_mode = 0; |
| 828 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index), |
| 829 | usbn_usbp_ctl_status.u64); |
| 830 | /* 10. Wait 1 us */ |
| 831 | udelay(1); |
| 832 | /* |
| 833 | * 11. Program the hreset_n field in the USBN clock-control register: |
| 834 | * USBN_CLK_CTL[HRST] = 1 |
| 835 | */ |
| 836 | usbn_clk_ctl.s.hrst = 1; |
| 837 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), |
| 838 | usbn_clk_ctl.u64); |
| 839 | /* 12. Proceed to USB core initialization */ |
| 840 | usbn_clk_ctl.s.enable = 1; |
| 841 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), |
| 842 | usbn_clk_ctl.u64); |
| 843 | udelay(1); |
| 844 | |
| 845 | /* |
| 846 | * USB Core Initialization |
| 847 | * |
| 848 | * 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to |
| 849 | * determine USB core configuration parameters. |
| 850 | * |
| 851 | * Nothing needed |
| 852 | * |
| 853 | * 2. Program the following fields in the global AHB configuration |
| 854 | * register (USBC_GAHBCFG) |
| 855 | * DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode |
| 856 | * Burst length, USBC_GAHBCFG[HBSTLEN] = 0 |
| 857 | * Nonperiodic TxFIFO empty level (slave mode only), |
| 858 | * USBC_GAHBCFG[NPTXFEMPLVL] |
| 859 | * Periodic TxFIFO empty level (slave mode only), |
| 860 | * USBC_GAHBCFG[PTXFEMPLVL] |
| 861 | * Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 |
| 862 | */ |
| 863 | { |
| 864 | union cvmx_usbcx_gahbcfg usbcx_gahbcfg; |
| 865 | /* Due to an errata, CN31XX doesn't support DMA */ |
| 866 | if (OCTEON_IS_MODEL(OCTEON_CN31XX)) |
| 867 | usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA; |
| 868 | usbcx_gahbcfg.u32 = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 869 | usbcx_gahbcfg.s.dmaen = !(usb->init_flags & |
| 870 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 871 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
| 872 | /* Only use one channel with non DMA */ |
| 873 | usb->idle_hardware_channels = 0x1; |
| 874 | else if (OCTEON_IS_MODEL(OCTEON_CN5XXX)) |
| 875 | /* CN5XXX have an errata with channel 3 */ |
| 876 | usb->idle_hardware_channels = 0xf7; |
| 877 | else |
| 878 | usb->idle_hardware_channels = 0xff; |
| 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 | } |
| 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 | */ |
| 893 | { |
| 894 | union cvmx_usbcx_gusbcfg usbcx_gusbcfg; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 895 | usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, |
| 896 | CVMX_USBCX_GUSBCFG(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 897 | usbcx_gusbcfg.s.toutcal = 0; |
| 898 | usbcx_gusbcfg.s.ddrsel = 0; |
| 899 | usbcx_gusbcfg.s.usbtrdtim = 0x5; |
| 900 | usbcx_gusbcfg.s.phylpwrclksel = 0; |
| 901 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index), |
| 902 | usbcx_gusbcfg.u32); |
| 903 | } |
| 904 | /* |
| 905 | * 4. The software must unmask the following bits in the USBC_GINTMSK |
| 906 | * register. |
| 907 | * OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1 |
| 908 | * Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1 |
| 909 | */ |
| 910 | { |
| 911 | union cvmx_usbcx_gintmsk usbcx_gintmsk; |
| 912 | int channel; |
| 913 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 914 | usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, |
| 915 | CVMX_USBCX_GINTMSK(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 916 | usbcx_gintmsk.s.otgintmsk = 1; |
| 917 | usbcx_gintmsk.s.modemismsk = 1; |
| 918 | usbcx_gintmsk.s.hchintmsk = 1; |
| 919 | usbcx_gintmsk.s.sofmsk = 0; |
| 920 | /* We need RX FIFO interrupts if we don't have DMA */ |
| 921 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
| 922 | usbcx_gintmsk.s.rxflvlmsk = 1; |
| 923 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index), |
| 924 | usbcx_gintmsk.u32); |
| 925 | |
| 926 | /* |
| 927 | * Disable all channel interrupts. We'll enable them per channel |
| 928 | * later. |
| 929 | */ |
| 930 | for (channel = 0; channel < 8; channel++) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 931 | __cvmx_usb_write_csr32(usb, |
| 932 | CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | { |
| 936 | /* |
| 937 | * Host Port Initialization |
| 938 | * |
| 939 | * 1. Program the host-port interrupt-mask field to unmask, |
| 940 | * USBC_GINTMSK[PRTINT] = 1 |
| 941 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 942 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
| 943 | union cvmx_usbcx_gintmsk, prtintmsk, 1); |
| 944 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
| 945 | union cvmx_usbcx_gintmsk, disconnintmsk, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 946 | /* |
| 947 | * 2. Program the USBC_HCFG register to select full-speed host |
| 948 | * or high-speed host. |
| 949 | */ |
| 950 | { |
| 951 | union cvmx_usbcx_hcfg usbcx_hcfg; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 952 | usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, |
| 953 | CVMX_USBCX_HCFG(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 954 | usbcx_hcfg.s.fslssupp = 0; |
| 955 | usbcx_hcfg.s.fslspclksel = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 956 | __cvmx_usb_write_csr32(usb, |
| 957 | CVMX_USBCX_HCFG(usb->index), |
| 958 | usbcx_hcfg.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 959 | } |
| 960 | /* |
| 961 | * 3. Program the port power bit to drive VBUS on the USB, |
| 962 | * USBC_HPRT[PRTPWR] = 1 |
| 963 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 964 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), |
| 965 | union cvmx_usbcx_hprt, prtpwr, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 966 | |
| 967 | /* |
| 968 | * Steps 4-15 from the manual are done later in the port enable |
| 969 | */ |
| 970 | } |
| 971 | |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | |
| 976 | /** |
| 977 | * Shutdown a USB port after a call to cvmx_usb_initialize(). |
| 978 | * The port should be disabled with all pipes closed when this |
| 979 | * function is called. |
| 980 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 981 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 982 | * |
| 983 | * Returns: 0 or a negative error code. |
| 984 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 985 | static int cvmx_usb_shutdown(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 986 | { |
| 987 | union cvmx_usbnx_clk_ctl usbn_clk_ctl; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 988 | |
| 989 | /* Make sure all pipes are closed */ |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 990 | if (!list_empty(&usb->idle_pipes) || |
| 991 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS]) || |
| 992 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT]) || |
| 993 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_CONTROL]) || |
| 994 | !list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_BULK])) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 995 | return -EBUSY; |
| 996 | |
| 997 | /* Disable the clocks and put them in power on reset */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 998 | usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, |
| 999 | CVMX_USBNX_CLK_CTL(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1000 | usbn_clk_ctl.s.enable = 1; |
| 1001 | usbn_clk_ctl.s.por = 1; |
| 1002 | usbn_clk_ctl.s.hclk_rst = 1; |
| 1003 | usbn_clk_ctl.s.prst = 0; |
| 1004 | usbn_clk_ctl.s.hrst = 0; |
| 1005 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index), |
| 1006 | usbn_clk_ctl.u64); |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
| 1010 | |
| 1011 | /** |
| 1012 | * Enable a USB port. After this call succeeds, the USB port is |
| 1013 | * online and servicing requests. |
| 1014 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1015 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1016 | * |
| 1017 | * Returns: 0 or a negative error code. |
| 1018 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1019 | static int cvmx_usb_enable(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1020 | { |
| 1021 | union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1022 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1023 | usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, |
| 1024 | CVMX_USBCX_HPRT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1025 | |
| 1026 | /* |
| 1027 | * If the port is already enabled the just return. We don't need to do |
| 1028 | * anything |
| 1029 | */ |
| 1030 | if (usb->usbcx_hprt.s.prtena) |
| 1031 | return 0; |
| 1032 | |
| 1033 | /* If there is nothing plugged into the port then fail immediately */ |
Raluca Oncioiu | b49f113 | 2014-03-08 00:44:12 +0200 | [diff] [blame] | 1034 | if (!usb->usbcx_hprt.s.prtconnsts) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1035 | return -ETIMEDOUT; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1036 | |
| 1037 | /* Program the port reset bit to start the reset process */ |
Raluca Oncioiu | b49f113 | 2014-03-08 00:44:12 +0200 | [diff] [blame] | 1038 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, |
| 1039 | prtrst, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1040 | |
| 1041 | /* |
| 1042 | * Wait at least 50ms (high speed), or 10ms (full speed) for the reset |
| 1043 | * process to complete. |
| 1044 | */ |
| 1045 | mdelay(50); |
| 1046 | |
| 1047 | /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1048 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, |
| 1049 | prtrst, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1050 | |
| 1051 | /* Wait for the USBC_HPRT[PRTENA]. */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1052 | if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), |
| 1053 | union cvmx_usbcx_hprt, prtena, ==, 1, 100000)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1054 | return -ETIMEDOUT; |
| 1055 | |
| 1056 | /* |
| 1057 | * Read the port speed field to get the enumerated speed, |
| 1058 | * USBC_HPRT[PRTSPD]. |
| 1059 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1060 | usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, |
| 1061 | CVMX_USBCX_HPRT(usb->index)); |
| 1062 | usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, |
| 1063 | CVMX_USBCX_GHWCFG3(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1064 | |
| 1065 | /* |
| 1066 | * 13. Program the USBC_GRXFSIZ register to select the size of the |
| 1067 | * receive FIFO (25%). |
| 1068 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1069 | USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), |
| 1070 | union cvmx_usbcx_grxfsiz, rxfdep, |
| 1071 | usbcx_ghwcfg3.s.dfifodepth / 4); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1072 | /* |
| 1073 | * 14. Program the USBC_GNPTXFSIZ register to select the size and the |
| 1074 | * start address of the non- periodic transmit FIFO for nonperiodic |
| 1075 | * transactions (50%). |
| 1076 | */ |
| 1077 | { |
| 1078 | union cvmx_usbcx_gnptxfsiz siz; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1079 | siz.u32 = __cvmx_usb_read_csr32(usb, |
| 1080 | CVMX_USBCX_GNPTXFSIZ(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1081 | siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2; |
| 1082 | siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1083 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), |
| 1084 | siz.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1085 | } |
| 1086 | /* |
| 1087 | * 15. Program the USBC_HPTXFSIZ register to select the size and start |
| 1088 | * address of the periodic transmit FIFO for periodic transactions |
| 1089 | * (25%). |
| 1090 | */ |
| 1091 | { |
| 1092 | union cvmx_usbcx_hptxfsiz siz; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1093 | siz.u32 = __cvmx_usb_read_csr32(usb, |
| 1094 | CVMX_USBCX_HPTXFSIZ(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1095 | siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4; |
| 1096 | siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1097 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), |
| 1098 | siz.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1099 | } |
| 1100 | /* Flush all FIFOs */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1101 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
| 1102 | union cvmx_usbcx_grstctl, txfnum, 0x10); |
| 1103 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
| 1104 | union cvmx_usbcx_grstctl, txfflsh, 1); |
| 1105 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
| 1106 | union cvmx_usbcx_grstctl, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1107 | txfflsh, ==, 0, 100); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1108 | USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
| 1109 | union cvmx_usbcx_grstctl, rxfflsh, 1); |
| 1110 | CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), |
| 1111 | union cvmx_usbcx_grstctl, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1112 | rxfflsh, ==, 0, 100); |
| 1113 | |
| 1114 | return 0; |
| 1115 | } |
| 1116 | |
| 1117 | |
| 1118 | /** |
| 1119 | * Disable a USB port. After this call the USB port will not |
| 1120 | * generate data transfers and will not generate events. |
| 1121 | * Transactions in process will fail and call their |
| 1122 | * associated callbacks. |
| 1123 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1124 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1125 | * |
| 1126 | * Returns: 0 or a negative error code. |
| 1127 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1128 | static int cvmx_usb_disable(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1129 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1130 | /* Disable the port */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1131 | USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, |
| 1132 | prtena, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1133 | return 0; |
| 1134 | } |
| 1135 | |
| 1136 | |
| 1137 | /** |
| 1138 | * Get the current state of the USB port. Use this call to |
| 1139 | * determine if the usb port has anything connected, is enabled, |
| 1140 | * or has some sort of error condition. The return value of this |
| 1141 | * call has "changed" bits to signal of the value of some fields |
Aaro Koskinen | 29a202f | 2013-10-06 22:22:26 +0300 | [diff] [blame] | 1142 | * have changed between calls. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1143 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1144 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1145 | * |
| 1146 | * Returns: Port status information |
| 1147 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1148 | static struct cvmx_usb_port_status cvmx_usb_get_status( |
| 1149 | struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1150 | { |
| 1151 | union cvmx_usbcx_hprt usbc_hprt; |
| 1152 | struct cvmx_usb_port_status result; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1153 | |
| 1154 | memset(&result, 0, sizeof(result)); |
| 1155 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1156 | usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, |
| 1157 | CVMX_USBCX_HPRT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1158 | result.port_enabled = usbc_hprt.s.prtena; |
| 1159 | result.port_over_current = usbc_hprt.s.prtovrcurract; |
| 1160 | result.port_powered = usbc_hprt.s.prtpwr; |
| 1161 | result.port_speed = usbc_hprt.s.prtspd; |
| 1162 | result.connected = usbc_hprt.s.prtconnsts; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1163 | result.connect_change = |
| 1164 | (result.connected != usb->port_status.connected); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1165 | |
| 1166 | return result; |
| 1167 | } |
| 1168 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1169 | /** |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1170 | * Open a virtual pipe between the host and a USB device. A pipe |
| 1171 | * must be opened before data can be transferred between a device |
| 1172 | * and Octeon. |
| 1173 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1174 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1175 | * @device_addr: |
| 1176 | * USB device address to open the pipe to |
| 1177 | * (0-127). |
| 1178 | * @endpoint_num: |
| 1179 | * USB endpoint number to open the pipe to |
| 1180 | * (0-15). |
| 1181 | * @device_speed: |
| 1182 | * The speed of the device the pipe is going |
| 1183 | * to. This must match the device's speed, |
| 1184 | * which may be different than the port speed. |
| 1185 | * @max_packet: The maximum packet length the device can |
| 1186 | * transmit/receive (low speed=0-8, full |
| 1187 | * speed=0-1023, high speed=0-1024). This value |
| 1188 | * comes from the standard endpoint descriptor |
| 1189 | * field wMaxPacketSize bits <10:0>. |
| 1190 | * @transfer_type: |
| 1191 | * The type of transfer this pipe is for. |
| 1192 | * @transfer_dir: |
| 1193 | * The direction the pipe is in. This is not |
| 1194 | * used for control pipes. |
| 1195 | * @interval: For ISOCHRONOUS and INTERRUPT transfers, |
| 1196 | * this is how often the transfer is scheduled |
| 1197 | * for. All other transfers should specify |
| 1198 | * zero. The units are in frames (8000/sec at |
| 1199 | * high speed, 1000/sec for full speed). |
| 1200 | * @multi_count: |
| 1201 | * For high speed devices, this is the maximum |
| 1202 | * allowed number of packet per microframe. |
| 1203 | * Specify zero for non high speed devices. This |
| 1204 | * value comes from the standard endpoint descriptor |
| 1205 | * field wMaxPacketSize bits <12:11>. |
| 1206 | * @hub_device_addr: |
| 1207 | * Hub device address this device is connected |
| 1208 | * to. Devices connected directly to Octeon |
| 1209 | * use zero. This is only used when the device |
| 1210 | * is full/low speed behind a high speed hub. |
| 1211 | * The address will be of the high speed hub, |
| 1212 | * not and full speed hubs after it. |
| 1213 | * @hub_port: Which port on the hub the device is |
| 1214 | * connected. Use zero for devices connected |
| 1215 | * directly to Octeon. Like hub_device_addr, |
| 1216 | * this is only used for full/low speed |
| 1217 | * devices behind a high speed hub. |
| 1218 | * |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1219 | * Returns: A non-NULL value is a pipe. NULL means an error. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1220 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1221 | static struct cvmx_usb_pipe *cvmx_usb_open_pipe(struct cvmx_usb_state *usb, |
| 1222 | int device_addr, int |
| 1223 | endpoint_num, |
| 1224 | enum cvmx_usb_speed |
| 1225 | device_speed, |
| 1226 | int max_packet, |
| 1227 | enum cvmx_usb_transfer |
| 1228 | transfer_type, |
| 1229 | enum cvmx_usb_direction |
| 1230 | transfer_dir, |
| 1231 | int interval, int multi_count, |
| 1232 | int hub_device_addr, |
| 1233 | int hub_port) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1234 | { |
| 1235 | struct cvmx_usb_pipe *pipe; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1236 | |
| 1237 | if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS))) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1238 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1239 | if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT))) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1240 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1241 | if (unlikely(device_speed > CVMX_USB_SPEED_LOW)) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1242 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1243 | if (unlikely((max_packet <= 0) || (max_packet > 1024))) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1244 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1245 | if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT)) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1246 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1247 | if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) && |
| 1248 | (transfer_dir != CVMX_USB_DIRECTION_IN))) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1249 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1250 | if (unlikely(interval < 0)) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1251 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1252 | if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval)) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1253 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1254 | if (unlikely(multi_count < 0)) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1255 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1256 | if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) && |
| 1257 | (multi_count != 0))) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1258 | return NULL; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1259 | if (unlikely((hub_device_addr < 0) || |
| 1260 | (hub_device_addr > MAX_USB_ADDRESS))) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1261 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1262 | if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT))) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1263 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1264 | |
Aaro Koskinen | d2695a8 | 2013-10-10 23:25:32 +0300 | [diff] [blame] | 1265 | pipe = kzalloc(sizeof(*pipe), GFP_ATOMIC); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1266 | if (!pipe) |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1267 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1268 | if ((device_speed == CVMX_USB_SPEED_HIGH) && |
| 1269 | (transfer_dir == CVMX_USB_DIRECTION_OUT) && |
| 1270 | (transfer_type == CVMX_USB_TRANSFER_BULK)) |
| 1271 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; |
| 1272 | pipe->device_addr = device_addr; |
| 1273 | pipe->endpoint_num = endpoint_num; |
| 1274 | pipe->device_speed = device_speed; |
| 1275 | pipe->max_packet = max_packet; |
| 1276 | pipe->transfer_type = transfer_type; |
| 1277 | pipe->transfer_dir = transfer_dir; |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1278 | INIT_LIST_HEAD(&pipe->transactions); |
| 1279 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1280 | /* |
| 1281 | * All pipes use interval to rate limit NAK processing. Force an |
| 1282 | * interval if one wasn't supplied |
| 1283 | */ |
| 1284 | if (!interval) |
| 1285 | interval = 1; |
| 1286 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { |
| 1287 | pipe->interval = interval*8; |
| 1288 | /* Force start splits to be schedule on uFrame 0 */ |
| 1289 | pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval; |
| 1290 | } else { |
| 1291 | pipe->interval = interval; |
| 1292 | pipe->next_tx_frame = usb->frame_number + pipe->interval; |
| 1293 | } |
| 1294 | pipe->multi_count = multi_count; |
| 1295 | pipe->hub_device_addr = hub_device_addr; |
| 1296 | pipe->hub_port = hub_port; |
| 1297 | pipe->pid_toggle = 0; |
| 1298 | pipe->split_sc_frame = -1; |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 1299 | list_add_tail(&pipe->node, &usb->idle_pipes); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1300 | |
| 1301 | /* |
| 1302 | * We don't need to tell the hardware about this pipe yet since |
| 1303 | * it doesn't have any submitted requests |
| 1304 | */ |
| 1305 | |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 1306 | return pipe; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1307 | } |
| 1308 | |
| 1309 | |
| 1310 | /** |
| 1311 | * Poll the RX FIFOs and remove data as needed. This function is only used |
| 1312 | * in non DMA mode. It is very important that this function be called quickly |
| 1313 | * enough to prevent FIFO overflow. |
| 1314 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1315 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1316 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1317 | static void __cvmx_usb_poll_rx_fifo(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1318 | { |
| 1319 | union cvmx_usbcx_grxstsph rx_status; |
| 1320 | int channel; |
| 1321 | int bytes; |
| 1322 | uint64_t address; |
| 1323 | uint32_t *ptr; |
| 1324 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1325 | rx_status.u32 = __cvmx_usb_read_csr32(usb, |
| 1326 | CVMX_USBCX_GRXSTSPH(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1327 | /* Only read data if IN data is there */ |
| 1328 | if (rx_status.s.pktsts != 2) |
| 1329 | return; |
| 1330 | /* Check if no data is available */ |
| 1331 | if (!rx_status.s.bcnt) |
| 1332 | return; |
| 1333 | |
| 1334 | channel = rx_status.s.chnum; |
| 1335 | bytes = rx_status.s.bcnt; |
| 1336 | if (!bytes) |
| 1337 | return; |
| 1338 | |
| 1339 | /* Get where the DMA engine would have written this data */ |
| 1340 | address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8); |
| 1341 | ptr = cvmx_phys_to_ptr(address); |
| 1342 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes); |
| 1343 | |
| 1344 | /* Loop writing the FIFO data for this packet into memory */ |
| 1345 | while (bytes > 0) { |
| 1346 | *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index)); |
| 1347 | bytes -= 4; |
| 1348 | } |
| 1349 | CVMX_SYNCW; |
| 1350 | |
| 1351 | return; |
| 1352 | } |
| 1353 | |
| 1354 | |
| 1355 | /** |
| 1356 | * Fill the TX hardware fifo with data out of the software |
| 1357 | * fifos |
| 1358 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1359 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1360 | * @fifo: Software fifo to use |
| 1361 | * @available: Amount of space in the hardware fifo |
| 1362 | * |
| 1363 | * Returns: Non zero if the hardware fifo was too small and needs |
| 1364 | * to be serviced again. |
| 1365 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1366 | static int __cvmx_usb_fill_tx_hw(struct cvmx_usb_state *usb, |
| 1367 | struct cvmx_usb_tx_fifo *fifo, int available) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1368 | { |
| 1369 | /* |
| 1370 | * We're done either when there isn't anymore space or the software FIFO |
| 1371 | * is empty |
| 1372 | */ |
| 1373 | while (available && (fifo->head != fifo->tail)) { |
| 1374 | int i = fifo->tail; |
| 1375 | const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1376 | uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, |
| 1377 | usb->index) ^ 4; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1378 | int words = available; |
| 1379 | |
| 1380 | /* Limit the amount of data to waht the SW fifo has */ |
| 1381 | if (fifo->entry[i].size <= available) { |
| 1382 | words = fifo->entry[i].size; |
| 1383 | fifo->tail++; |
| 1384 | if (fifo->tail > MAX_CHANNELS) |
| 1385 | fifo->tail = 0; |
| 1386 | } |
| 1387 | |
| 1388 | /* Update the next locations and counts */ |
| 1389 | available -= words; |
| 1390 | fifo->entry[i].address += words * 4; |
| 1391 | fifo->entry[i].size -= words; |
| 1392 | |
| 1393 | /* |
| 1394 | * Write the HW fifo data. The read every three writes is due |
| 1395 | * to an errata on CN3XXX chips |
| 1396 | */ |
| 1397 | while (words > 3) { |
| 1398 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1399 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1400 | cvmx_write64_uint32(csr_address, *ptr++); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1401 | cvmx_read64_uint64( |
| 1402 | CVMX_USBNX_DMA0_INB_CHN0(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1403 | words -= 3; |
| 1404 | } |
| 1405 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1406 | if (--words) { |
| 1407 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1408 | if (--words) |
| 1409 | cvmx_write64_uint32(csr_address, *ptr++); |
| 1410 | } |
| 1411 | cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index)); |
| 1412 | } |
| 1413 | return fifo->head != fifo->tail; |
| 1414 | } |
| 1415 | |
| 1416 | |
| 1417 | /** |
| 1418 | * Check the hardware FIFOs and fill them as needed |
| 1419 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1420 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1421 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1422 | static void __cvmx_usb_poll_tx_fifo(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1423 | { |
| 1424 | if (usb->periodic.head != usb->periodic.tail) { |
| 1425 | union cvmx_usbcx_hptxsts tx_status; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1426 | tx_status.u32 = __cvmx_usb_read_csr32(usb, |
| 1427 | CVMX_USBCX_HPTXSTS(usb->index)); |
| 1428 | if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, |
| 1429 | tx_status.s.ptxfspcavail)) |
| 1430 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
| 1431 | union cvmx_usbcx_gintmsk, |
| 1432 | ptxfempmsk, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1433 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1434 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
| 1435 | union cvmx_usbcx_gintmsk, |
| 1436 | ptxfempmsk, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1437 | } |
| 1438 | |
| 1439 | if (usb->nonperiodic.head != usb->nonperiodic.tail) { |
| 1440 | union cvmx_usbcx_gnptxsts tx_status; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1441 | tx_status.u32 = __cvmx_usb_read_csr32(usb, |
| 1442 | CVMX_USBCX_GNPTXSTS(usb->index)); |
| 1443 | if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, |
| 1444 | tx_status.s.nptxfspcavail)) |
| 1445 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
| 1446 | union cvmx_usbcx_gintmsk, |
| 1447 | nptxfempmsk, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1448 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1449 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
| 1450 | union cvmx_usbcx_gintmsk, |
| 1451 | nptxfempmsk, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1452 | } |
| 1453 | |
| 1454 | return; |
| 1455 | } |
| 1456 | |
| 1457 | |
| 1458 | /** |
| 1459 | * Fill the TX FIFO with an outgoing packet |
| 1460 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1461 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1462 | * @channel: Channel number to get packet from |
| 1463 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1464 | 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] | 1465 | { |
| 1466 | union cvmx_usbcx_hccharx hcchar; |
| 1467 | union cvmx_usbcx_hcspltx usbc_hcsplt; |
| 1468 | union cvmx_usbcx_hctsizx usbc_hctsiz; |
| 1469 | struct cvmx_usb_tx_fifo *fifo; |
| 1470 | |
| 1471 | /* We only need to fill data on outbound channels */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1472 | hcchar.u32 = __cvmx_usb_read_csr32(usb, |
| 1473 | CVMX_USBCX_HCCHARX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1474 | if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT) |
| 1475 | return; |
| 1476 | |
| 1477 | /* OUT Splits only have data on the start and not the complete */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1478 | usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, |
| 1479 | CVMX_USBCX_HCSPLTX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1480 | if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt) |
| 1481 | return; |
| 1482 | |
| 1483 | /* |
| 1484 | * Find out how many bytes we need to fill and convert it into 32bit |
| 1485 | * words. |
| 1486 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1487 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, |
| 1488 | CVMX_USBCX_HCTSIZX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1489 | if (!usbc_hctsiz.s.xfersize) |
| 1490 | return; |
| 1491 | |
| 1492 | if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) || |
| 1493 | (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS)) |
| 1494 | fifo = &usb->periodic; |
| 1495 | else |
| 1496 | fifo = &usb->nonperiodic; |
| 1497 | |
| 1498 | fifo->entry[fifo->head].channel = channel; |
| 1499 | fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8); |
| 1500 | fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2; |
| 1501 | fifo->head++; |
| 1502 | if (fifo->head > MAX_CHANNELS) |
| 1503 | fifo->head = 0; |
| 1504 | |
| 1505 | __cvmx_usb_poll_tx_fifo(usb); |
| 1506 | |
| 1507 | return; |
| 1508 | } |
| 1509 | |
| 1510 | /** |
| 1511 | * Perform channel specific setup for Control transactions. All |
| 1512 | * the generic stuff will already have been done in |
| 1513 | * __cvmx_usb_start_channel() |
| 1514 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1515 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1516 | * @channel: Channel to setup |
| 1517 | * @pipe: Pipe for control transaction |
| 1518 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1519 | static void __cvmx_usb_start_channel_control(struct cvmx_usb_state *usb, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1520 | int channel, |
| 1521 | struct cvmx_usb_pipe *pipe) |
| 1522 | { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1523 | struct cvmx_usb_transaction *transaction = |
| 1524 | list_first_entry(&pipe->transactions, typeof(*transaction), |
| 1525 | node); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1526 | union cvmx_usb_control_header *header = |
| 1527 | cvmx_phys_to_ptr(transaction->control_header); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1528 | int bytes_to_transfer = transaction->buffer_length - |
| 1529 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1530 | int packets_to_transfer; |
| 1531 | union cvmx_usbcx_hctsizx usbc_hctsiz; |
| 1532 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1533 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, |
| 1534 | CVMX_USBCX_HCTSIZX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1535 | |
| 1536 | switch (transaction->stage) { |
| 1537 | case CVMX_USB_STAGE_NON_CONTROL: |
| 1538 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: |
| 1539 | cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__); |
| 1540 | break; |
| 1541 | case CVMX_USB_STAGE_SETUP: |
| 1542 | usbc_hctsiz.s.pid = 3; /* Setup */ |
| 1543 | bytes_to_transfer = sizeof(*header); |
| 1544 | /* All Control operations start with a setup going OUT */ |
| 1545 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT); |
| 1546 | /* |
| 1547 | * Setup send the control header instead of the buffer data. The |
| 1548 | * buffer data will be used in the next stage |
| 1549 | */ |
| 1550 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header); |
| 1551 | break; |
| 1552 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: |
| 1553 | usbc_hctsiz.s.pid = 3; /* Setup */ |
| 1554 | bytes_to_transfer = 0; |
| 1555 | /* All Control operations start with a setup going OUT */ |
| 1556 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT); |
| 1557 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1); |
| 1558 | break; |
| 1559 | case CVMX_USB_STAGE_DATA: |
| 1560 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); |
| 1561 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { |
| 1562 | if (header->s.request_type & 0x80) |
| 1563 | bytes_to_transfer = 0; |
| 1564 | else if (bytes_to_transfer > pipe->max_packet) |
| 1565 | bytes_to_transfer = pipe->max_packet; |
| 1566 | } |
| 1567 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
| 1568 | union cvmx_usbcx_hccharx, epdir, |
| 1569 | ((header->s.request_type & 0x80) ? |
| 1570 | CVMX_USB_DIRECTION_IN : |
| 1571 | CVMX_USB_DIRECTION_OUT)); |
| 1572 | break; |
| 1573 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: |
| 1574 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); |
| 1575 | if (!(header->s.request_type & 0x80)) |
| 1576 | bytes_to_transfer = 0; |
| 1577 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
| 1578 | union cvmx_usbcx_hccharx, epdir, |
| 1579 | ((header->s.request_type & 0x80) ? |
| 1580 | CVMX_USB_DIRECTION_IN : |
| 1581 | CVMX_USB_DIRECTION_OUT)); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1582 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), |
| 1583 | union cvmx_usbcx_hcspltx, compsplt, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1584 | break; |
| 1585 | case CVMX_USB_STAGE_STATUS: |
| 1586 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); |
| 1587 | bytes_to_transfer = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1588 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
| 1589 | union cvmx_usbcx_hccharx, epdir, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1590 | ((header->s.request_type & 0x80) ? |
| 1591 | CVMX_USB_DIRECTION_OUT : |
| 1592 | CVMX_USB_DIRECTION_IN)); |
| 1593 | break; |
| 1594 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: |
| 1595 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); |
| 1596 | bytes_to_transfer = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1597 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
| 1598 | union cvmx_usbcx_hccharx, epdir, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1599 | ((header->s.request_type & 0x80) ? |
| 1600 | CVMX_USB_DIRECTION_OUT : |
| 1601 | CVMX_USB_DIRECTION_IN)); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1602 | USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), |
| 1603 | union cvmx_usbcx_hcspltx, compsplt, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1604 | break; |
| 1605 | } |
| 1606 | |
| 1607 | /* |
| 1608 | * Make sure the transfer never exceeds the byte limit of the hardware. |
| 1609 | * Further bytes will be sent as continued transactions |
| 1610 | */ |
| 1611 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { |
| 1612 | /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */ |
| 1613 | bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet; |
| 1614 | bytes_to_transfer *= pipe->max_packet; |
| 1615 | } |
| 1616 | |
| 1617 | /* |
| 1618 | * Calculate the number of packets to transfer. If the length is zero |
| 1619 | * we still need to transfer one packet |
| 1620 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1621 | packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / |
| 1622 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1623 | if (packets_to_transfer == 0) |
| 1624 | packets_to_transfer = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1625 | else if ((packets_to_transfer > 1) && |
| 1626 | (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1627 | /* |
| 1628 | * Limit to one packet when not using DMA. Channels must be |
| 1629 | * restarted between every packet for IN transactions, so there |
| 1630 | * is no reason to do multiple packets in a row |
| 1631 | */ |
| 1632 | packets_to_transfer = 1; |
| 1633 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; |
| 1634 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { |
| 1635 | /* |
| 1636 | * Limit the number of packet and data transferred to what the |
| 1637 | * hardware can handle |
| 1638 | */ |
| 1639 | packets_to_transfer = MAX_TRANSFER_PACKETS; |
| 1640 | bytes_to_transfer = packets_to_transfer * pipe->max_packet; |
| 1641 | } |
| 1642 | |
| 1643 | usbc_hctsiz.s.xfersize = bytes_to_transfer; |
| 1644 | usbc_hctsiz.s.pktcnt = packets_to_transfer; |
| 1645 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1646 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), |
| 1647 | usbc_hctsiz.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1648 | return; |
| 1649 | } |
| 1650 | |
| 1651 | |
| 1652 | /** |
| 1653 | * Start a channel to perform the pipe's head transaction |
| 1654 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1655 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1656 | * @channel: Channel to setup |
| 1657 | * @pipe: Pipe to start |
| 1658 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1659 | static void __cvmx_usb_start_channel(struct cvmx_usb_state *usb, |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1660 | int channel, |
| 1661 | struct cvmx_usb_pipe *pipe) |
| 1662 | { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 1663 | struct cvmx_usb_transaction *transaction = |
| 1664 | list_first_entry(&pipe->transactions, typeof(*transaction), |
| 1665 | node); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1666 | |
| 1667 | /* Make sure all writes to the DMA region get flushed */ |
| 1668 | CVMX_SYNCW; |
| 1669 | |
| 1670 | /* Attach the channel to the pipe */ |
| 1671 | usb->pipe_for_channel[channel] = pipe; |
| 1672 | pipe->channel = channel; |
| 1673 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED; |
| 1674 | |
| 1675 | /* Mark this channel as in use */ |
| 1676 | usb->idle_hardware_channels &= ~(1<<channel); |
| 1677 | |
| 1678 | /* Enable the channel interrupt bits */ |
| 1679 | { |
| 1680 | union cvmx_usbcx_hcintx usbc_hcint; |
| 1681 | union cvmx_usbcx_hcintmskx usbc_hcintmsk; |
| 1682 | union cvmx_usbcx_haintmsk usbc_haintmsk; |
| 1683 | |
| 1684 | /* Clear all channel status bits */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1685 | usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, |
| 1686 | CVMX_USBCX_HCINTX(channel, usb->index)); |
| 1687 | __cvmx_usb_write_csr32(usb, |
| 1688 | CVMX_USBCX_HCINTX(channel, usb->index), |
| 1689 | usbc_hcint.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1690 | |
| 1691 | usbc_hcintmsk.u32 = 0; |
| 1692 | usbc_hcintmsk.s.chhltdmsk = 1; |
| 1693 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { |
| 1694 | /* |
| 1695 | * Channels need these extra interrupts when we aren't |
| 1696 | * in DMA mode. |
| 1697 | */ |
| 1698 | usbc_hcintmsk.s.datatglerrmsk = 1; |
| 1699 | usbc_hcintmsk.s.frmovrunmsk = 1; |
| 1700 | usbc_hcintmsk.s.bblerrmsk = 1; |
| 1701 | usbc_hcintmsk.s.xacterrmsk = 1; |
| 1702 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { |
| 1703 | /* |
| 1704 | * Splits don't generate xfercompl, so we need |
| 1705 | * ACK and NYET. |
| 1706 | */ |
| 1707 | usbc_hcintmsk.s.nyetmsk = 1; |
| 1708 | usbc_hcintmsk.s.ackmsk = 1; |
| 1709 | } |
| 1710 | usbc_hcintmsk.s.nakmsk = 1; |
| 1711 | usbc_hcintmsk.s.stallmsk = 1; |
| 1712 | usbc_hcintmsk.s.xfercomplmsk = 1; |
| 1713 | } |
| 1714 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32); |
| 1715 | |
| 1716 | /* Enable the channel interrupt to propagate */ |
| 1717 | usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index)); |
| 1718 | usbc_haintmsk.s.haintmsk |= 1<<channel; |
| 1719 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32); |
| 1720 | } |
| 1721 | |
| 1722 | /* Setup the locations the DMA engines use */ |
| 1723 | { |
| 1724 | uint64_t dma_address = transaction->buffer + transaction->actual_bytes; |
| 1725 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) |
| 1726 | dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes; |
| 1727 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address); |
| 1728 | __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address); |
| 1729 | } |
| 1730 | |
| 1731 | /* Setup both the size of the transfer and the SPLIT characteristics */ |
| 1732 | { |
| 1733 | union cvmx_usbcx_hcspltx usbc_hcsplt = {.u32 = 0}; |
| 1734 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = 0}; |
| 1735 | int packets_to_transfer; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1736 | int bytes_to_transfer = transaction->buffer_length - |
| 1737 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1738 | |
| 1739 | /* |
| 1740 | * ISOCHRONOUS transactions store each individual transfer size |
| 1741 | * in the packet structure, not the global buffer_length |
| 1742 | */ |
| 1743 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1744 | bytes_to_transfer = |
| 1745 | transaction->iso_packets[0].length - |
| 1746 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1747 | |
| 1748 | /* |
| 1749 | * We need to do split transactions when we are talking to non |
| 1750 | * high speed devices that are behind a high speed hub |
| 1751 | */ |
| 1752 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { |
| 1753 | /* |
| 1754 | * On the start split phase (stage is even) record the |
| 1755 | * frame number we will need to send the split complete. |
| 1756 | * We only store the lower two bits since the time ahead |
| 1757 | * can only be two frames |
| 1758 | */ |
| 1759 | if ((transaction->stage&1) == 0) { |
| 1760 | if (transaction->type == CVMX_USB_TRANSFER_BULK) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1761 | pipe->split_sc_frame = |
| 1762 | (usb->frame_number + 1) & 0x7f; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1763 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1764 | pipe->split_sc_frame = |
| 1765 | (usb->frame_number + 2) & 0x7f; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1766 | } else |
| 1767 | pipe->split_sc_frame = -1; |
| 1768 | |
| 1769 | usbc_hcsplt.s.spltena = 1; |
| 1770 | usbc_hcsplt.s.hubaddr = pipe->hub_device_addr; |
| 1771 | usbc_hcsplt.s.prtaddr = pipe->hub_port; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1772 | usbc_hcsplt.s.compsplt = (transaction->stage == |
| 1773 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1774 | |
| 1775 | /* |
| 1776 | * SPLIT transactions can only ever transmit one data |
| 1777 | * packet so limit the transfer size to the max packet |
| 1778 | * size |
| 1779 | */ |
| 1780 | if (bytes_to_transfer > pipe->max_packet) |
| 1781 | bytes_to_transfer = pipe->max_packet; |
| 1782 | |
| 1783 | /* |
| 1784 | * ISOCHRONOUS OUT splits are unique in that they limit |
| 1785 | * data transfers to 188 byte chunks representing the |
| 1786 | * begin/middle/end of the data or all |
| 1787 | */ |
| 1788 | if (!usbc_hcsplt.s.compsplt && |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1789 | (pipe->transfer_dir == |
| 1790 | CVMX_USB_DIRECTION_OUT) && |
| 1791 | (pipe->transfer_type == |
| 1792 | CVMX_USB_TRANSFER_ISOCHRONOUS)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1793 | /* |
| 1794 | * Clear the split complete frame number as |
| 1795 | * there isn't going to be a split complete |
| 1796 | */ |
| 1797 | pipe->split_sc_frame = -1; |
| 1798 | /* |
| 1799 | * See if we've started this transfer and sent |
| 1800 | * data |
| 1801 | */ |
| 1802 | if (transaction->actual_bytes == 0) { |
| 1803 | /* |
| 1804 | * Nothing sent yet, this is either a |
| 1805 | * begin or the entire payload |
| 1806 | */ |
| 1807 | if (bytes_to_transfer <= 188) |
| 1808 | /* Entire payload in one go */ |
| 1809 | usbc_hcsplt.s.xactpos = 3; |
| 1810 | else |
| 1811 | /* First part of payload */ |
| 1812 | usbc_hcsplt.s.xactpos = 2; |
| 1813 | } else { |
| 1814 | /* |
| 1815 | * Continuing the previous data, we must |
| 1816 | * either be in the middle or at the end |
| 1817 | */ |
| 1818 | if (bytes_to_transfer <= 188) |
| 1819 | /* End of payload */ |
| 1820 | usbc_hcsplt.s.xactpos = 1; |
| 1821 | else |
| 1822 | /* Middle of payload */ |
| 1823 | usbc_hcsplt.s.xactpos = 0; |
| 1824 | } |
| 1825 | /* |
| 1826 | * Again, the transfer size is limited to 188 |
| 1827 | * bytes |
| 1828 | */ |
| 1829 | if (bytes_to_transfer > 188) |
| 1830 | bytes_to_transfer = 188; |
| 1831 | } |
| 1832 | } |
| 1833 | |
| 1834 | /* |
| 1835 | * Make sure the transfer never exceeds the byte limit of the |
| 1836 | * hardware. Further bytes will be sent as continued |
| 1837 | * transactions |
| 1838 | */ |
| 1839 | if (bytes_to_transfer > MAX_TRANSFER_BYTES) { |
| 1840 | /* |
| 1841 | * Round MAX_TRANSFER_BYTES to a multiple of out packet |
| 1842 | * size |
| 1843 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1844 | bytes_to_transfer = MAX_TRANSFER_BYTES / |
| 1845 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1846 | bytes_to_transfer *= pipe->max_packet; |
| 1847 | } |
| 1848 | |
| 1849 | /* |
| 1850 | * Calculate the number of packets to transfer. If the length is |
| 1851 | * zero we still need to transfer one packet |
| 1852 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1853 | packets_to_transfer = |
| 1854 | (bytes_to_transfer + pipe->max_packet - 1) / |
| 1855 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1856 | if (packets_to_transfer == 0) |
| 1857 | packets_to_transfer = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1858 | else if ((packets_to_transfer > 1) && |
| 1859 | (usb->init_flags & |
| 1860 | CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1861 | /* |
| 1862 | * Limit to one packet when not using DMA. Channels must |
| 1863 | * be restarted between every packet for IN |
| 1864 | * transactions, so there is no reason to do multiple |
| 1865 | * packets in a row |
| 1866 | */ |
| 1867 | packets_to_transfer = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1868 | bytes_to_transfer = packets_to_transfer * |
| 1869 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1870 | } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) { |
| 1871 | /* |
| 1872 | * Limit the number of packet and data transferred to |
| 1873 | * what the hardware can handle |
| 1874 | */ |
| 1875 | packets_to_transfer = MAX_TRANSFER_PACKETS; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1876 | bytes_to_transfer = packets_to_transfer * |
| 1877 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1878 | } |
| 1879 | |
| 1880 | usbc_hctsiz.s.xfersize = bytes_to_transfer; |
| 1881 | usbc_hctsiz.s.pktcnt = packets_to_transfer; |
| 1882 | |
| 1883 | /* Update the DATA0/DATA1 toggle */ |
| 1884 | usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe); |
| 1885 | /* |
| 1886 | * High speed pipes may need a hardware ping before they start |
| 1887 | */ |
| 1888 | if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING) |
| 1889 | usbc_hctsiz.s.dopng = 1; |
| 1890 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1891 | __cvmx_usb_write_csr32(usb, |
| 1892 | CVMX_USBCX_HCSPLTX(channel, usb->index), |
| 1893 | usbc_hcsplt.u32); |
| 1894 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, |
| 1895 | usb->index), usbc_hctsiz.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1896 | } |
| 1897 | |
| 1898 | /* Setup the Host Channel Characteristics Register */ |
| 1899 | { |
| 1900 | union cvmx_usbcx_hccharx usbc_hcchar = {.u32 = 0}; |
| 1901 | |
| 1902 | /* |
| 1903 | * Set the startframe odd/even properly. This is only used for |
| 1904 | * periodic |
| 1905 | */ |
| 1906 | usbc_hcchar.s.oddfrm = usb->frame_number&1; |
| 1907 | |
| 1908 | /* |
| 1909 | * Set the number of back to back packets allowed by this |
| 1910 | * endpoint. Split transactions interpret "ec" as the number of |
| 1911 | * immediate retries of failure. These retries happen too |
| 1912 | * quickly, so we disable these entirely for splits |
| 1913 | */ |
| 1914 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) |
| 1915 | usbc_hcchar.s.ec = 1; |
| 1916 | else if (pipe->multi_count < 1) |
| 1917 | usbc_hcchar.s.ec = 1; |
| 1918 | else if (pipe->multi_count > 3) |
| 1919 | usbc_hcchar.s.ec = 3; |
| 1920 | else |
| 1921 | usbc_hcchar.s.ec = pipe->multi_count; |
| 1922 | |
| 1923 | /* Set the rest of the endpoint specific settings */ |
| 1924 | usbc_hcchar.s.devaddr = pipe->device_addr; |
| 1925 | usbc_hcchar.s.eptype = transaction->type; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1926 | usbc_hcchar.s.lspddev = |
| 1927 | (pipe->device_speed == CVMX_USB_SPEED_LOW); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1928 | usbc_hcchar.s.epdir = pipe->transfer_dir; |
| 1929 | usbc_hcchar.s.epnum = pipe->endpoint_num; |
| 1930 | usbc_hcchar.s.mps = pipe->max_packet; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1931 | __cvmx_usb_write_csr32(usb, |
| 1932 | CVMX_USBCX_HCCHARX(channel, usb->index), |
| 1933 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1934 | } |
| 1935 | |
| 1936 | /* Do transaction type specific fixups as needed */ |
| 1937 | switch (transaction->type) { |
| 1938 | case CVMX_USB_TRANSFER_CONTROL: |
| 1939 | __cvmx_usb_start_channel_control(usb, channel, pipe); |
| 1940 | break; |
| 1941 | case CVMX_USB_TRANSFER_BULK: |
| 1942 | case CVMX_USB_TRANSFER_INTERRUPT: |
| 1943 | break; |
| 1944 | case CVMX_USB_TRANSFER_ISOCHRONOUS: |
| 1945 | if (!__cvmx_usb_pipe_needs_split(usb, pipe)) { |
| 1946 | /* |
| 1947 | * ISO transactions require different PIDs depending on |
| 1948 | * direction and how many packets are needed |
| 1949 | */ |
| 1950 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) { |
| 1951 | if (pipe->multi_count < 2) /* Need DATA0 */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1952 | USB_SET_FIELD32( |
| 1953 | CVMX_USBCX_HCTSIZX(channel, |
| 1954 | usb->index), |
| 1955 | union cvmx_usbcx_hctsizx, |
| 1956 | pid, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1957 | else /* Need MDATA */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1958 | USB_SET_FIELD32( |
| 1959 | CVMX_USBCX_HCTSIZX(channel, |
| 1960 | usb->index), |
| 1961 | union cvmx_usbcx_hctsizx, |
| 1962 | pid, 3); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1963 | } |
| 1964 | } |
| 1965 | break; |
| 1966 | } |
| 1967 | { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1968 | union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = |
| 1969 | __cvmx_usb_read_csr32(usb, |
| 1970 | CVMX_USBCX_HCTSIZX(channel, usb->index))}; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1971 | transaction->xfersize = usbc_hctsiz.s.xfersize; |
| 1972 | transaction->pktcnt = usbc_hctsiz.s.pktcnt; |
| 1973 | } |
| 1974 | /* Remeber when we start a split transaction */ |
| 1975 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) |
| 1976 | usb->active_split = transaction; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1977 | USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), |
| 1978 | union cvmx_usbcx_hccharx, chena, 1); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1979 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
| 1980 | __cvmx_usb_fill_tx_fifo(usb, channel); |
| 1981 | return; |
| 1982 | } |
| 1983 | |
| 1984 | |
| 1985 | /** |
| 1986 | * Find a pipe that is ready to be scheduled to hardware. |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 1987 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1988 | * @list: Pipe list to search |
| 1989 | * @current_frame: |
| 1990 | * Frame counter to use as a time reference. |
| 1991 | * |
| 1992 | * Returns: Pipe or NULL if none are ready |
| 1993 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 1994 | static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe( |
| 1995 | struct cvmx_usb_state *usb, |
| 1996 | struct list_head *list, |
| 1997 | uint64_t current_frame) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 1998 | { |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 1999 | struct cvmx_usb_pipe *pipe; |
| 2000 | |
| 2001 | list_for_each_entry(pipe, list, node) { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2002 | struct cvmx_usb_transaction *t = |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2003 | list_first_entry(&pipe->transactions, typeof(*t), |
| 2004 | node); |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2005 | if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && t && |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2006 | (pipe->next_tx_frame <= current_frame) && |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2007 | ((pipe->split_sc_frame == -1) || |
| 2008 | ((((int)current_frame - (int)pipe->split_sc_frame) |
| 2009 | & 0x7f) < 0x40)) && |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2010 | (!usb->active_split || (usb->active_split == t))) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2011 | CVMX_PREFETCH(pipe, 128); |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2012 | CVMX_PREFETCH(t, 0); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2013 | return pipe; |
| 2014 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2015 | } |
| 2016 | return NULL; |
| 2017 | } |
| 2018 | |
| 2019 | |
| 2020 | /** |
| 2021 | * Called whenever a pipe might need to be scheduled to the |
| 2022 | * hardware. |
| 2023 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2024 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2025 | * @is_sof: True if this schedule was called on a SOF interrupt. |
| 2026 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2027 | 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] | 2028 | { |
| 2029 | int channel; |
| 2030 | struct cvmx_usb_pipe *pipe; |
| 2031 | int need_sof; |
| 2032 | enum cvmx_usb_transfer ttype; |
| 2033 | |
| 2034 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { |
| 2035 | /* |
| 2036 | * Without DMA we need to be careful to not schedule something |
| 2037 | * at the end of a frame and cause an overrun. |
| 2038 | */ |
| 2039 | union cvmx_usbcx_hfnum hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))}; |
| 2040 | union cvmx_usbcx_hfir hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))}; |
| 2041 | if (hfnum.s.frrem < hfir.s.frint/4) |
| 2042 | goto done; |
| 2043 | } |
| 2044 | |
| 2045 | while (usb->idle_hardware_channels) { |
| 2046 | /* Find an idle channel */ |
| 2047 | channel = __fls(usb->idle_hardware_channels); |
| 2048 | if (unlikely(channel > 7)) |
| 2049 | break; |
| 2050 | |
| 2051 | /* Find a pipe needing service */ |
| 2052 | pipe = NULL; |
| 2053 | if (is_sof) { |
| 2054 | /* |
| 2055 | * Only process periodic pipes on SOF interrupts. This |
| 2056 | * way we are sure that the periodic data is sent in the |
| 2057 | * beginning of the frame |
| 2058 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2059 | pipe = __cvmx_usb_find_ready_pipe(usb, |
| 2060 | usb->active_pipes + |
| 2061 | CVMX_USB_TRANSFER_ISOCHRONOUS, |
| 2062 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2063 | if (likely(!pipe)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2064 | pipe = __cvmx_usb_find_ready_pipe(usb, |
| 2065 | usb->active_pipes + |
| 2066 | CVMX_USB_TRANSFER_INTERRUPT, |
| 2067 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2068 | } |
| 2069 | if (likely(!pipe)) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2070 | pipe = __cvmx_usb_find_ready_pipe(usb, |
| 2071 | usb->active_pipes + |
| 2072 | CVMX_USB_TRANSFER_CONTROL, |
| 2073 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2074 | if (likely(!pipe)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2075 | pipe = __cvmx_usb_find_ready_pipe(usb, |
| 2076 | usb->active_pipes + |
| 2077 | CVMX_USB_TRANSFER_BULK, |
| 2078 | usb->frame_number); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2079 | } |
| 2080 | if (!pipe) |
| 2081 | break; |
| 2082 | |
| 2083 | __cvmx_usb_start_channel(usb, channel, pipe); |
| 2084 | } |
| 2085 | |
| 2086 | done: |
| 2087 | /* |
| 2088 | * Only enable SOF interrupts when we have transactions pending in the |
| 2089 | * future that might need to be scheduled |
| 2090 | */ |
| 2091 | need_sof = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2092 | for (ttype = CVMX_USB_TRANSFER_CONTROL; |
| 2093 | ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) { |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 2094 | list_for_each_entry(pipe, &usb->active_pipes[ttype], node) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2095 | if (pipe->next_tx_frame > usb->frame_number) { |
| 2096 | need_sof = 1; |
| 2097 | break; |
| 2098 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2099 | } |
| 2100 | } |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2101 | USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), |
| 2102 | union cvmx_usbcx_gintmsk, sofmsk, need_sof); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2103 | return; |
| 2104 | } |
| 2105 | |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2106 | static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2107 | { |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2108 | return container_of(p, struct octeon_hcd, usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2109 | } |
| 2110 | |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2111 | static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p) |
| 2112 | { |
| 2113 | return container_of((void *)p, struct usb_hcd, hcd_priv); |
| 2114 | } |
| 2115 | |
| 2116 | static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb, |
| 2117 | enum cvmx_usb_complete status, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2118 | struct cvmx_usb_pipe *pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2119 | struct cvmx_usb_transaction |
| 2120 | *transaction, |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2121 | int bytes_transferred, |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2122 | struct urb *urb) |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2123 | { |
| 2124 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 2125 | struct usb_hcd *hcd = octeon_to_hcd(priv); |
| 2126 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2127 | |
| 2128 | urb->actual_length = bytes_transferred; |
| 2129 | urb->hcpriv = NULL; |
| 2130 | |
Aaro Koskinen | 244544a | 2013-10-10 23:25:33 +0300 | [diff] [blame] | 2131 | if (!list_empty(&urb->urb_list)) |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2132 | /* |
| 2133 | * It is on the dequeue_list, but we are going to call |
| 2134 | * usb_hcd_giveback_urb(), so we must clear it from |
| 2135 | * the list. We got to it before the |
| 2136 | * octeon_usb_urb_dequeue_work() tasklet did. |
| 2137 | */ |
Aaro Koskinen | 244544a | 2013-10-10 23:25:33 +0300 | [diff] [blame] | 2138 | list_del_init(&urb->urb_list); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2139 | |
| 2140 | /* For Isochronous transactions we need to update the URB packet status |
| 2141 | list from data in our private copy */ |
| 2142 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
| 2143 | int i; |
| 2144 | /* |
| 2145 | * The pointer to the private list is stored in the setup_packet |
| 2146 | * field. |
| 2147 | */ |
| 2148 | struct cvmx_usb_iso_packet *iso_packet = |
| 2149 | (struct cvmx_usb_iso_packet *) urb->setup_packet; |
| 2150 | /* Recalculate the transfer size by adding up each packet */ |
| 2151 | urb->actual_length = 0; |
| 2152 | for (i = 0; i < urb->number_of_packets; i++) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2153 | if (iso_packet[i].status == |
| 2154 | CVMX_USB_COMPLETE_SUCCESS) { |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2155 | urb->iso_frame_desc[i].status = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2156 | urb->iso_frame_desc[i].actual_length = |
| 2157 | iso_packet[i].length; |
| 2158 | urb->actual_length += |
| 2159 | urb->iso_frame_desc[i].actual_length; |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2160 | } else { |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2161 | 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] | 2162 | i, urb->number_of_packets, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2163 | iso_packet[i].status, pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2164 | transaction, iso_packet[i].length); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2165 | urb->iso_frame_desc[i].status = -EREMOTEIO; |
| 2166 | } |
| 2167 | } |
| 2168 | /* Free the private list now that we don't need it anymore */ |
| 2169 | kfree(iso_packet); |
| 2170 | urb->setup_packet = NULL; |
| 2171 | } |
| 2172 | |
| 2173 | switch (status) { |
| 2174 | case CVMX_USB_COMPLETE_SUCCESS: |
| 2175 | urb->status = 0; |
| 2176 | break; |
| 2177 | case CVMX_USB_COMPLETE_CANCEL: |
| 2178 | if (urb->status == 0) |
| 2179 | urb->status = -ENOENT; |
| 2180 | break; |
| 2181 | case CVMX_USB_COMPLETE_STALL: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2182 | dev_dbg(dev, "status=stall pipe=%p transaction=%p size=%d\n", |
| 2183 | pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2184 | urb->status = -EPIPE; |
| 2185 | break; |
| 2186 | case CVMX_USB_COMPLETE_BABBLEERR: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2187 | dev_dbg(dev, "status=babble pipe=%p transaction=%p size=%d\n", |
| 2188 | pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2189 | urb->status = -EPIPE; |
| 2190 | break; |
| 2191 | case CVMX_USB_COMPLETE_SHORT: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2192 | dev_dbg(dev, "status=short pipe=%p transaction=%p size=%d\n", |
| 2193 | pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2194 | urb->status = -EREMOTEIO; |
| 2195 | break; |
| 2196 | case CVMX_USB_COMPLETE_ERROR: |
| 2197 | case CVMX_USB_COMPLETE_XACTERR: |
| 2198 | case CVMX_USB_COMPLETE_DATATGLERR: |
| 2199 | case CVMX_USB_COMPLETE_FRAMEERR: |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2200 | dev_dbg(dev, "status=%d pipe=%p transaction=%p size=%d\n", |
| 2201 | status, pipe, transaction, bytes_transferred); |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2202 | urb->status = -EPROTO; |
| 2203 | break; |
| 2204 | } |
| 2205 | spin_unlock(&priv->lock); |
| 2206 | usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status); |
| 2207 | spin_lock(&priv->lock); |
| 2208 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2209 | |
| 2210 | /** |
| 2211 | * Signal the completion of a transaction and free it. The |
| 2212 | * transaction will be removed from the pipe transaction list. |
| 2213 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2214 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2215 | * @pipe: Pipe the transaction is on |
| 2216 | * @transaction: |
| 2217 | * Transaction that completed |
| 2218 | * @complete_code: |
| 2219 | * Completion code |
| 2220 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2221 | static void __cvmx_usb_perform_complete( |
| 2222 | struct cvmx_usb_state *usb, |
| 2223 | struct cvmx_usb_pipe *pipe, |
| 2224 | struct cvmx_usb_transaction *transaction, |
| 2225 | enum cvmx_usb_complete complete_code) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2226 | { |
| 2227 | /* If this was a split then clear our split in progress marker */ |
| 2228 | if (usb->active_split == transaction) |
| 2229 | usb->active_split = NULL; |
| 2230 | |
| 2231 | /* |
| 2232 | * Isochronous transactions need extra processing as they might not be |
| 2233 | * done after a single data transfer |
| 2234 | */ |
| 2235 | if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) { |
| 2236 | /* Update the number of bytes transferred in this ISO packet */ |
| 2237 | transaction->iso_packets[0].length = transaction->actual_bytes; |
| 2238 | transaction->iso_packets[0].status = complete_code; |
| 2239 | |
| 2240 | /* |
| 2241 | * If there are more ISOs pending and we succeeded, schedule the |
| 2242 | * next one |
| 2243 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2244 | if ((transaction->iso_number_packets > 1) && |
| 2245 | (complete_code == CVMX_USB_COMPLETE_SUCCESS)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2246 | /* No bytes transferred for this packet as of yet */ |
| 2247 | transaction->actual_bytes = 0; |
| 2248 | /* One less ISO waiting to transfer */ |
| 2249 | transaction->iso_number_packets--; |
| 2250 | /* Increment to the next location in our packet array */ |
| 2251 | transaction->iso_packets++; |
| 2252 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; |
| 2253 | goto done; |
| 2254 | } |
| 2255 | } |
| 2256 | |
| 2257 | /* Remove the transaction from the pipe list */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2258 | list_del(&transaction->node); |
| 2259 | if (list_empty(&pipe->transactions)) |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 2260 | list_move_tail(&pipe->node, &usb->idle_pipes); |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2261 | octeon_usb_urb_complete_callback(usb, complete_code, pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2262 | transaction, |
Aaro Koskinen | 75ee512 | 2013-10-06 22:22:28 +0300 | [diff] [blame] | 2263 | transaction->actual_bytes, |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2264 | transaction->urb); |
Aaro Koskinen | a2dfef0 | 2013-10-10 23:25:31 +0300 | [diff] [blame] | 2265 | kfree(transaction); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2266 | done: |
| 2267 | return; |
| 2268 | } |
| 2269 | |
| 2270 | |
| 2271 | /** |
| 2272 | * Submit a usb transaction to a pipe. Called for all types |
| 2273 | * of transactions. |
| 2274 | * |
| 2275 | * @usb: |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2276 | * @pipe: Which pipe to submit to. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2277 | * @type: Transaction type |
| 2278 | * @buffer: User buffer for the transaction |
| 2279 | * @buffer_length: |
| 2280 | * User buffer's length in bytes |
| 2281 | * @control_header: |
| 2282 | * For control transactions, the 8 byte standard header |
| 2283 | * @iso_start_frame: |
| 2284 | * For ISO transactions, the start frame |
| 2285 | * @iso_number_packets: |
| 2286 | * For ISO, the number of packet in the transaction. |
| 2287 | * @iso_packets: |
| 2288 | * A description of each ISO packet |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2289 | * @urb: URB for the callback |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2290 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2291 | * Returns: Transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2292 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2293 | static struct cvmx_usb_transaction *__cvmx_usb_submit_transaction( |
| 2294 | struct cvmx_usb_state *usb, |
| 2295 | struct cvmx_usb_pipe *pipe, |
| 2296 | enum cvmx_usb_transfer type, |
| 2297 | uint64_t buffer, |
| 2298 | int buffer_length, |
| 2299 | uint64_t control_header, |
| 2300 | int iso_start_frame, |
| 2301 | int iso_number_packets, |
| 2302 | struct cvmx_usb_iso_packet *iso_packets, |
| 2303 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2304 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2305 | struct cvmx_usb_transaction *transaction; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2306 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2307 | if (unlikely(pipe->transfer_type != type)) |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2308 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2309 | |
Aaro Koskinen | a2dfef0 | 2013-10-10 23:25:31 +0300 | [diff] [blame] | 2310 | transaction = kzalloc(sizeof(*transaction), GFP_ATOMIC); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2311 | if (unlikely(!transaction)) |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2312 | return NULL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2313 | |
| 2314 | transaction->type = type; |
| 2315 | transaction->buffer = buffer; |
| 2316 | transaction->buffer_length = buffer_length; |
| 2317 | transaction->control_header = control_header; |
| 2318 | /* FIXME: This is not used, implement it. */ |
| 2319 | transaction->iso_start_frame = iso_start_frame; |
| 2320 | transaction->iso_number_packets = iso_number_packets; |
| 2321 | transaction->iso_packets = iso_packets; |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2322 | transaction->urb = urb; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2323 | if (transaction->type == CVMX_USB_TRANSFER_CONTROL) |
| 2324 | transaction->stage = CVMX_USB_STAGE_SETUP; |
| 2325 | else |
| 2326 | transaction->stage = CVMX_USB_STAGE_NON_CONTROL; |
| 2327 | |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2328 | if (!list_empty(&pipe->transactions)) { |
| 2329 | list_add_tail(&transaction->node, &pipe->transactions); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2330 | } else { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2331 | list_add_tail(&transaction->node, &pipe->transactions); |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 2332 | list_move_tail(&pipe->node, |
| 2333 | &usb->active_pipes[pipe->transfer_type]); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2334 | |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2335 | /* |
| 2336 | * We may need to schedule the pipe if this was the head of the |
| 2337 | * pipe. |
| 2338 | */ |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2339 | __cvmx_usb_schedule(usb, 0); |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2340 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2341 | |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2342 | return transaction; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2343 | } |
| 2344 | |
| 2345 | |
| 2346 | /** |
| 2347 | * Call to submit a USB Bulk transfer to a pipe. |
| 2348 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2349 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2350 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 9ccca70 | 2013-10-06 22:22:30 +0300 | [diff] [blame] | 2351 | * @urb: URB. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2352 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2353 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2354 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2355 | static struct cvmx_usb_transaction *cvmx_usb_submit_bulk( |
| 2356 | struct cvmx_usb_state *usb, |
| 2357 | struct cvmx_usb_pipe *pipe, |
| 2358 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2359 | { |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2360 | return __cvmx_usb_submit_transaction(usb, pipe, CVMX_USB_TRANSFER_BULK, |
| 2361 | urb->transfer_dma, |
| 2362 | urb->transfer_buffer_length, |
| 2363 | 0, /* control_header */ |
| 2364 | 0, /* iso_start_frame */ |
| 2365 | 0, /* iso_number_packets */ |
| 2366 | NULL, /* iso_packets */ |
| 2367 | urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2368 | } |
| 2369 | |
| 2370 | |
| 2371 | /** |
| 2372 | * Call to submit a USB Interrupt transfer to a pipe. |
| 2373 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2374 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2375 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2376 | * @urb: URB returned when the callback is called. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2377 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2378 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2379 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2380 | static struct cvmx_usb_transaction *cvmx_usb_submit_interrupt( |
| 2381 | struct cvmx_usb_state *usb, |
| 2382 | struct cvmx_usb_pipe *pipe, |
| 2383 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2384 | { |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2385 | return __cvmx_usb_submit_transaction(usb, pipe, |
| 2386 | CVMX_USB_TRANSFER_INTERRUPT, |
| 2387 | urb->transfer_dma, |
| 2388 | urb->transfer_buffer_length, |
| 2389 | 0, /* control_header */ |
| 2390 | 0, /* iso_start_frame */ |
| 2391 | 0, /* iso_number_packets */ |
| 2392 | NULL, /* iso_packets */ |
| 2393 | urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2394 | } |
| 2395 | |
| 2396 | |
| 2397 | /** |
| 2398 | * Call to submit a USB Control transfer to a pipe. |
| 2399 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2400 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2401 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 2ae09e8 | 2013-10-06 22:22:31 +0300 | [diff] [blame] | 2402 | * @urb: URB. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2403 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2404 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2405 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2406 | static struct cvmx_usb_transaction *cvmx_usb_submit_control( |
| 2407 | struct cvmx_usb_state *usb, |
| 2408 | struct cvmx_usb_pipe *pipe, |
| 2409 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2410 | { |
Aaro Koskinen | 2ae09e8 | 2013-10-06 22:22:31 +0300 | [diff] [blame] | 2411 | int buffer_length = urb->transfer_buffer_length; |
| 2412 | uint64_t control_header = urb->setup_dma; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2413 | union cvmx_usb_control_header *header = |
| 2414 | cvmx_phys_to_ptr(control_header); |
| 2415 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2416 | if ((header->s.request_type & 0x80) == 0) |
| 2417 | buffer_length = le16_to_cpu(header->s.length); |
| 2418 | |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2419 | return __cvmx_usb_submit_transaction(usb, pipe, |
| 2420 | CVMX_USB_TRANSFER_CONTROL, |
| 2421 | urb->transfer_dma, buffer_length, |
| 2422 | control_header, |
| 2423 | 0, /* iso_start_frame */ |
| 2424 | 0, /* iso_number_packets */ |
| 2425 | NULL, /* iso_packets */ |
| 2426 | urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2427 | } |
| 2428 | |
| 2429 | |
| 2430 | /** |
| 2431 | * Call to submit a USB Isochronous transfer to a pipe. |
| 2432 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2433 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2434 | * @pipe: Handle to the pipe for the transfer. |
Aaro Koskinen | 0cce100 | 2013-10-06 22:22:29 +0300 | [diff] [blame] | 2435 | * @urb: URB returned when the callback is called. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2436 | * |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2437 | * Returns: A submitted transaction or NULL on failure. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2438 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2439 | static struct cvmx_usb_transaction *cvmx_usb_submit_isochronous( |
| 2440 | struct cvmx_usb_state *usb, |
| 2441 | struct cvmx_usb_pipe *pipe, |
| 2442 | struct urb *urb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2443 | { |
Aaro Koskinen | e16b5e3 | 2013-10-06 22:22:33 +0300 | [diff] [blame] | 2444 | struct cvmx_usb_iso_packet *packets; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2445 | |
Aaro Koskinen | e16b5e3 | 2013-10-06 22:22:33 +0300 | [diff] [blame] | 2446 | packets = (struct cvmx_usb_iso_packet *) urb->setup_packet; |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2447 | return __cvmx_usb_submit_transaction(usb, pipe, |
| 2448 | CVMX_USB_TRANSFER_ISOCHRONOUS, |
| 2449 | urb->transfer_dma, |
| 2450 | urb->transfer_buffer_length, |
| 2451 | 0, /* control_header */ |
| 2452 | urb->start_frame, |
| 2453 | urb->number_of_packets, |
| 2454 | packets, urb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2455 | } |
| 2456 | |
| 2457 | |
| 2458 | /** |
| 2459 | * Cancel one outstanding request in a pipe. Canceling a request |
| 2460 | * can fail if the transaction has already completed before cancel |
| 2461 | * is called. Even after a successful cancel call, it may take |
| 2462 | * a frame or two for the cvmx_usb_poll() function to call the |
| 2463 | * associated callback. |
| 2464 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2465 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2466 | * @pipe: Pipe to cancel requests in. |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2467 | * @transaction: Transaction to cancel, returned by the submit function. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2468 | * |
| 2469 | * Returns: 0 or a negative error code. |
| 2470 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2471 | static int cvmx_usb_cancel(struct cvmx_usb_state *usb, |
| 2472 | struct cvmx_usb_pipe *pipe, |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 2473 | struct cvmx_usb_transaction *transaction) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2474 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2475 | /* |
| 2476 | * If the transaction is the HEAD of the queue and scheduled. We need to |
| 2477 | * treat it special |
| 2478 | */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2479 | if (list_first_entry(&pipe->transactions, typeof(*transaction), node) == |
| 2480 | transaction && (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2481 | union cvmx_usbcx_hccharx usbc_hcchar; |
| 2482 | |
| 2483 | usb->pipe_for_channel[pipe->channel] = NULL; |
| 2484 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; |
| 2485 | |
| 2486 | CVMX_SYNCW; |
| 2487 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2488 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, |
| 2489 | CVMX_USBCX_HCCHARX(pipe->channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2490 | /* |
| 2491 | * If the channel isn't enabled then the transaction already |
| 2492 | * completed. |
| 2493 | */ |
| 2494 | if (usbc_hcchar.s.chena) { |
| 2495 | usbc_hcchar.s.chdis = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2496 | __cvmx_usb_write_csr32(usb, |
| 2497 | CVMX_USBCX_HCCHARX(pipe->channel, |
| 2498 | usb->index), |
| 2499 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2500 | } |
| 2501 | } |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2502 | __cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2503 | CVMX_USB_COMPLETE_CANCEL); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2504 | return 0; |
| 2505 | } |
| 2506 | |
| 2507 | |
| 2508 | /** |
| 2509 | * Cancel all outstanding requests in a pipe. Logically all this |
| 2510 | * does is call cvmx_usb_cancel() in a loop. |
| 2511 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2512 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2513 | * @pipe: Pipe to cancel requests in. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2514 | * |
| 2515 | * Returns: 0 or a negative error code. |
| 2516 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2517 | static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb, |
| 2518 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2519 | { |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2520 | struct cvmx_usb_transaction *transaction, *next; |
| 2521 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2522 | /* Simply loop through and attempt to cancel each transaction */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2523 | list_for_each_entry_safe(transaction, next, &pipe->transactions, node) { |
| 2524 | int result = cvmx_usb_cancel(usb, pipe, transaction); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2525 | if (unlikely(result != 0)) |
| 2526 | return result; |
| 2527 | } |
| 2528 | return 0; |
| 2529 | } |
| 2530 | |
| 2531 | |
| 2532 | /** |
| 2533 | * Close a pipe created with cvmx_usb_open_pipe(). |
| 2534 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2535 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2536 | * @pipe: Pipe to close. |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2537 | * |
| 2538 | * Returns: 0 or a negative error code. EBUSY is returned if the pipe has |
| 2539 | * outstanding transfers. |
| 2540 | */ |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 2541 | static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb, |
| 2542 | struct cvmx_usb_pipe *pipe) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2543 | { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2544 | /* Fail if the pipe has pending transactions */ |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2545 | if (!list_empty(&pipe->transactions)) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2546 | return -EBUSY; |
| 2547 | |
Aaro Koskinen | 4a23ee1 | 2013-10-10 23:25:35 +0300 | [diff] [blame] | 2548 | list_del(&pipe->node); |
Aaro Koskinen | d2695a8 | 2013-10-10 23:25:32 +0300 | [diff] [blame] | 2549 | kfree(pipe); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2550 | |
| 2551 | return 0; |
| 2552 | } |
| 2553 | |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2554 | /** |
| 2555 | * Get the current USB protocol level frame number. The frame |
| 2556 | * number is always in the range of 0-0x7ff. |
| 2557 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2558 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2559 | * |
| 2560 | * Returns: USB frame number |
| 2561 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2562 | static int cvmx_usb_get_frame_number(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2563 | { |
| 2564 | int frame_number; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2565 | union cvmx_usbcx_hfnum usbc_hfnum; |
| 2566 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2567 | usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, |
| 2568 | CVMX_USBCX_HFNUM(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2569 | frame_number = usbc_hfnum.s.frnum; |
| 2570 | |
| 2571 | return frame_number; |
| 2572 | } |
| 2573 | |
| 2574 | |
| 2575 | /** |
| 2576 | * Poll a channel for status |
| 2577 | * |
| 2578 | * @usb: USB device |
| 2579 | * @channel: Channel to poll |
| 2580 | * |
| 2581 | * Returns: Zero on success |
| 2582 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 2583 | 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] | 2584 | { |
| 2585 | union cvmx_usbcx_hcintx usbc_hcint; |
| 2586 | union cvmx_usbcx_hctsizx usbc_hctsiz; |
| 2587 | union cvmx_usbcx_hccharx usbc_hcchar; |
| 2588 | struct cvmx_usb_pipe *pipe; |
| 2589 | struct cvmx_usb_transaction *transaction; |
| 2590 | int bytes_this_transfer; |
| 2591 | int bytes_in_last_packet; |
| 2592 | int packets_processed; |
| 2593 | int buffer_space_left; |
| 2594 | |
| 2595 | /* Read the interrupt status bits for the channel */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2596 | usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, |
| 2597 | CVMX_USBCX_HCINTX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2598 | |
| 2599 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2600 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, |
| 2601 | CVMX_USBCX_HCCHARX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2602 | |
| 2603 | if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) { |
| 2604 | /* |
| 2605 | * There seems to be a bug in CN31XX which can cause |
| 2606 | * interrupt IN transfers to get stuck until we do a |
| 2607 | * write of HCCHARX without changing things |
| 2608 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2609 | __cvmx_usb_write_csr32(usb, |
| 2610 | CVMX_USBCX_HCCHARX(channel, |
| 2611 | usb->index), |
| 2612 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2613 | return 0; |
| 2614 | } |
| 2615 | |
| 2616 | /* |
| 2617 | * In non DMA mode the channels don't halt themselves. We need |
| 2618 | * to manually disable channels that are left running |
| 2619 | */ |
| 2620 | if (!usbc_hcint.s.chhltd) { |
| 2621 | if (usbc_hcchar.s.chena) { |
| 2622 | union cvmx_usbcx_hcintmskx hcintmsk; |
| 2623 | /* Disable all interrupts except CHHLTD */ |
| 2624 | hcintmsk.u32 = 0; |
| 2625 | hcintmsk.s.chhltdmsk = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2626 | __cvmx_usb_write_csr32(usb, |
| 2627 | CVMX_USBCX_HCINTMSKX(channel, |
| 2628 | usb->index), |
| 2629 | hcintmsk.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2630 | usbc_hcchar.s.chdis = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2631 | __cvmx_usb_write_csr32(usb, |
| 2632 | CVMX_USBCX_HCCHARX(channel, |
| 2633 | usb->index), |
| 2634 | usbc_hcchar.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2635 | return 0; |
| 2636 | } else if (usbc_hcint.s.xfercompl) { |
| 2637 | /* |
| 2638 | * Successful IN/OUT with transfer complete. |
| 2639 | * Channel halt isn't needed. |
| 2640 | */ |
| 2641 | } else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2642 | cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", |
| 2643 | usb->index, channel); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2644 | return 0; |
| 2645 | } |
| 2646 | } |
| 2647 | } else { |
| 2648 | /* |
| 2649 | * There is are no interrupts that we need to process when the |
| 2650 | * channel is still running |
| 2651 | */ |
| 2652 | if (!usbc_hcint.s.chhltd) |
| 2653 | return 0; |
| 2654 | } |
| 2655 | |
| 2656 | /* Disable the channel interrupts now that it is done */ |
| 2657 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0); |
| 2658 | usb->idle_hardware_channels |= (1<<channel); |
| 2659 | |
| 2660 | /* Make sure this channel is tied to a valid pipe */ |
| 2661 | pipe = usb->pipe_for_channel[channel]; |
| 2662 | CVMX_PREFETCH(pipe, 0); |
| 2663 | CVMX_PREFETCH(pipe, 128); |
| 2664 | if (!pipe) |
| 2665 | return 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2666 | transaction = list_first_entry(&pipe->transactions, |
| 2667 | typeof(*transaction), |
Aaro Koskinen | 5669601 | 2013-10-10 23:25:36 +0300 | [diff] [blame] | 2668 | node); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2669 | CVMX_PREFETCH(transaction, 0); |
| 2670 | |
| 2671 | /* |
| 2672 | * Disconnect this pipe from the HW channel. Later the schedule |
| 2673 | * function will figure out which pipe needs to go |
| 2674 | */ |
| 2675 | usb->pipe_for_channel[channel] = NULL; |
| 2676 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED; |
| 2677 | |
| 2678 | /* |
| 2679 | * Read the channel config info so we can figure out how much data |
| 2680 | * transfered |
| 2681 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2682 | usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, |
| 2683 | CVMX_USBCX_HCCHARX(channel, usb->index)); |
| 2684 | usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, |
| 2685 | CVMX_USBCX_HCTSIZX(channel, usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2686 | |
| 2687 | /* |
| 2688 | * Calculating the number of bytes successfully transferred is dependent |
| 2689 | * on the transfer direction |
| 2690 | */ |
| 2691 | packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt; |
| 2692 | if (usbc_hcchar.s.epdir) { |
| 2693 | /* |
| 2694 | * IN transactions are easy. For every byte received the |
| 2695 | * hardware decrements xfersize. All we need to do is subtract |
| 2696 | * the current value of xfersize from its starting value and we |
| 2697 | * know how many bytes were written to the buffer |
| 2698 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2699 | bytes_this_transfer = transaction->xfersize - |
| 2700 | usbc_hctsiz.s.xfersize; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2701 | } else { |
| 2702 | /* |
| 2703 | * OUT transaction don't decrement xfersize. Instead pktcnt is |
| 2704 | * decremented on every successful packet send. The hardware |
| 2705 | * does this when it receives an ACK, or NYET. If it doesn't |
| 2706 | * receive one of these responses pktcnt doesn't change |
| 2707 | */ |
| 2708 | bytes_this_transfer = packets_processed * usbc_hcchar.s.mps; |
| 2709 | /* |
| 2710 | * The last packet may not be a full transfer if we didn't have |
| 2711 | * enough data |
| 2712 | */ |
| 2713 | if (bytes_this_transfer > transaction->xfersize) |
| 2714 | bytes_this_transfer = transaction->xfersize; |
| 2715 | } |
| 2716 | /* Figure out how many bytes were in the last packet of the transfer */ |
| 2717 | if (packets_processed) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2718 | bytes_in_last_packet = bytes_this_transfer - |
| 2719 | (packets_processed - 1) * usbc_hcchar.s.mps; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2720 | else |
| 2721 | bytes_in_last_packet = bytes_this_transfer; |
| 2722 | |
| 2723 | /* |
| 2724 | * As a special case, setup transactions output the setup header, not |
| 2725 | * the user's data. For this reason we don't count setup data as bytes |
| 2726 | * transferred |
| 2727 | */ |
| 2728 | if ((transaction->stage == CVMX_USB_STAGE_SETUP) || |
| 2729 | (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE)) |
| 2730 | bytes_this_transfer = 0; |
| 2731 | |
| 2732 | /* |
| 2733 | * Add the bytes transferred to the running total. It is important that |
| 2734 | * bytes_this_transfer doesn't count any data that needs to be |
| 2735 | * retransmitted |
| 2736 | */ |
| 2737 | transaction->actual_bytes += bytes_this_transfer; |
| 2738 | if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2739 | buffer_space_left = transaction->iso_packets[0].length - |
| 2740 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2741 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2742 | buffer_space_left = transaction->buffer_length - |
| 2743 | transaction->actual_bytes; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2744 | |
| 2745 | /* |
| 2746 | * We need to remember the PID toggle state for the next transaction. |
| 2747 | * The hardware already updated it for the next transaction |
| 2748 | */ |
| 2749 | pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0); |
| 2750 | |
| 2751 | /* |
| 2752 | * For high speed bulk out, assume the next transaction will need to do |
| 2753 | * a ping before proceeding. If this isn't true the ACK processing below |
| 2754 | * will clear this flag |
| 2755 | */ |
| 2756 | if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) && |
| 2757 | (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) && |
| 2758 | (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT)) |
| 2759 | pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING; |
| 2760 | |
| 2761 | if (usbc_hcint.s.stall) { |
| 2762 | /* |
| 2763 | * STALL as a response means this transaction cannot be |
| 2764 | * completed because the device can't process transactions. Tell |
| 2765 | * the user. Any data that was transferred will be counted on |
| 2766 | * the actual bytes transferred |
| 2767 | */ |
| 2768 | pipe->pid_toggle = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2769 | __cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2770 | CVMX_USB_COMPLETE_STALL); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2771 | } else if (usbc_hcint.s.xacterr) { |
| 2772 | /* |
| 2773 | * We know at least one packet worked if we get a ACK or NAK. |
| 2774 | * Reset the retry counter |
| 2775 | */ |
| 2776 | if (usbc_hcint.s.nak || usbc_hcint.s.ack) |
| 2777 | transaction->retries = 0; |
| 2778 | transaction->retries++; |
| 2779 | if (transaction->retries > MAX_RETRIES) { |
| 2780 | /* |
| 2781 | * XactErr as a response means the device signaled |
| 2782 | * something wrong with the transfer. For example, PID |
| 2783 | * toggle errors cause these |
| 2784 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2785 | __cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2786 | CVMX_USB_COMPLETE_XACTERR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2787 | } else { |
| 2788 | /* |
| 2789 | * If this was a split then clear our split in progress |
| 2790 | * marker |
| 2791 | */ |
| 2792 | if (usb->active_split == transaction) |
| 2793 | usb->active_split = NULL; |
| 2794 | /* |
| 2795 | * Rewind to the beginning of the transaction by anding |
| 2796 | * off the split complete bit |
| 2797 | */ |
| 2798 | transaction->stage &= ~1; |
| 2799 | pipe->split_sc_frame = -1; |
| 2800 | pipe->next_tx_frame += pipe->interval; |
| 2801 | if (pipe->next_tx_frame < usb->frame_number) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2802 | pipe->next_tx_frame = |
| 2803 | usb->frame_number + pipe->interval - |
| 2804 | (usb->frame_number - |
| 2805 | pipe->next_tx_frame) % pipe->interval; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2806 | } |
| 2807 | } else if (usbc_hcint.s.bblerr) { |
| 2808 | /* Babble Error (BblErr) */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2809 | __cvmx_usb_perform_complete(usb, pipe, transaction, |
| 2810 | CVMX_USB_COMPLETE_BABBLEERR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2811 | } else if (usbc_hcint.s.datatglerr) { |
| 2812 | /* We'll retry the exact same transaction again */ |
| 2813 | transaction->retries++; |
| 2814 | } else if (usbc_hcint.s.nyet) { |
| 2815 | /* |
| 2816 | * NYET as a response is only allowed in three cases: as a |
| 2817 | * response to a ping, as a response to a split transaction, and |
| 2818 | * as a response to a bulk out. The ping case is handled by |
| 2819 | * hardware, so we only have splits and bulk out |
| 2820 | */ |
| 2821 | if (!__cvmx_usb_pipe_needs_split(usb, pipe)) { |
| 2822 | transaction->retries = 0; |
| 2823 | /* |
| 2824 | * If there is more data to go then we need to try |
| 2825 | * again. Otherwise this transaction is complete |
| 2826 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2827 | if ((buffer_space_left == 0) || |
| 2828 | (bytes_in_last_packet < pipe->max_packet)) |
| 2829 | __cvmx_usb_perform_complete(usb, pipe, |
| 2830 | transaction, |
| 2831 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2832 | } else { |
| 2833 | /* |
| 2834 | * Split transactions retry the split complete 4 times |
| 2835 | * then rewind to the start split and do the entire |
| 2836 | * transactions again |
| 2837 | */ |
| 2838 | transaction->retries++; |
| 2839 | if ((transaction->retries & 0x3) == 0) { |
| 2840 | /* |
| 2841 | * Rewind to the beginning of the transaction by |
| 2842 | * anding off the split complete bit |
| 2843 | */ |
| 2844 | transaction->stage &= ~1; |
| 2845 | pipe->split_sc_frame = -1; |
| 2846 | } |
| 2847 | } |
| 2848 | } else if (usbc_hcint.s.ack) { |
| 2849 | transaction->retries = 0; |
| 2850 | /* |
| 2851 | * The ACK bit can only be checked after the other error bits. |
| 2852 | * This is because a multi packet transfer may succeed in a |
| 2853 | * number of packets and then get a different response on the |
| 2854 | * last packet. In this case both ACK and the last response bit |
| 2855 | * will be set. If none of the other response bits is set, then |
| 2856 | * the last packet must have been an ACK |
| 2857 | * |
| 2858 | * Since we got an ACK, we know we don't need to do a ping on |
| 2859 | * this pipe |
| 2860 | */ |
| 2861 | pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING; |
| 2862 | |
| 2863 | switch (transaction->type) { |
| 2864 | case CVMX_USB_TRANSFER_CONTROL: |
| 2865 | switch (transaction->stage) { |
| 2866 | case CVMX_USB_STAGE_NON_CONTROL: |
| 2867 | case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE: |
| 2868 | /* This should be impossible */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2869 | __cvmx_usb_perform_complete(usb, pipe, |
| 2870 | transaction, CVMX_USB_COMPLETE_ERROR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2871 | break; |
| 2872 | case CVMX_USB_STAGE_SETUP: |
| 2873 | pipe->pid_toggle = 1; |
| 2874 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2875 | transaction->stage = |
| 2876 | CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2877 | else { |
| 2878 | union cvmx_usb_control_header *header = |
| 2879 | cvmx_phys_to_ptr(transaction->control_header); |
| 2880 | if (header->s.length) |
| 2881 | transaction->stage = CVMX_USB_STAGE_DATA; |
| 2882 | else |
| 2883 | transaction->stage = CVMX_USB_STAGE_STATUS; |
| 2884 | } |
| 2885 | break; |
| 2886 | case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE: |
| 2887 | { |
| 2888 | union cvmx_usb_control_header *header = |
| 2889 | cvmx_phys_to_ptr(transaction->control_header); |
| 2890 | if (header->s.length) |
| 2891 | transaction->stage = CVMX_USB_STAGE_DATA; |
| 2892 | else |
| 2893 | transaction->stage = CVMX_USB_STAGE_STATUS; |
| 2894 | } |
| 2895 | break; |
| 2896 | case CVMX_USB_STAGE_DATA: |
| 2897 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2898 | transaction->stage = |
| 2899 | CVMX_USB_STAGE_DATA_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2900 | /* |
| 2901 | * For setup OUT data that are splits, |
| 2902 | * the hardware doesn't appear to count |
| 2903 | * transferred data. Here we manually |
| 2904 | * update the data transferred |
| 2905 | */ |
| 2906 | if (!usbc_hcchar.s.epdir) { |
| 2907 | if (buffer_space_left < pipe->max_packet) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2908 | transaction->actual_bytes += |
| 2909 | buffer_space_left; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2910 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2911 | transaction->actual_bytes += |
| 2912 | pipe->max_packet; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2913 | } |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2914 | } else if ((buffer_space_left == 0) || |
| 2915 | (bytes_in_last_packet < |
| 2916 | pipe->max_packet)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2917 | pipe->pid_toggle = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2918 | transaction->stage = |
| 2919 | CVMX_USB_STAGE_STATUS; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2920 | } |
| 2921 | break; |
| 2922 | case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE: |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2923 | if ((buffer_space_left == 0) || |
| 2924 | (bytes_in_last_packet < |
| 2925 | pipe->max_packet)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2926 | pipe->pid_toggle = 1; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2927 | transaction->stage = |
| 2928 | CVMX_USB_STAGE_STATUS; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2929 | } else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2930 | transaction->stage = |
| 2931 | CVMX_USB_STAGE_DATA; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2932 | } |
| 2933 | break; |
| 2934 | case CVMX_USB_STAGE_STATUS: |
| 2935 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2936 | transaction->stage = |
| 2937 | CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2938 | else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2939 | __cvmx_usb_perform_complete(usb, pipe, |
| 2940 | transaction, |
| 2941 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2942 | break; |
| 2943 | case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE: |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2944 | __cvmx_usb_perform_complete(usb, pipe, |
| 2945 | transaction, |
| 2946 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2947 | break; |
| 2948 | } |
| 2949 | break; |
| 2950 | case CVMX_USB_TRANSFER_BULK: |
| 2951 | case CVMX_USB_TRANSFER_INTERRUPT: |
| 2952 | /* |
| 2953 | * The only time a bulk transfer isn't complete when it |
| 2954 | * finishes with an ACK is during a split transaction. |
| 2955 | * For splits we need to continue the transfer if more |
| 2956 | * data is needed |
| 2957 | */ |
| 2958 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2959 | if (transaction->stage == |
| 2960 | CVMX_USB_STAGE_NON_CONTROL) |
| 2961 | transaction->stage = |
| 2962 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2963 | else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2964 | if (buffer_space_left && |
| 2965 | (bytes_in_last_packet == |
| 2966 | pipe->max_packet)) |
| 2967 | transaction->stage = |
| 2968 | CVMX_USB_STAGE_NON_CONTROL; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2969 | else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2970 | if (transaction->type == |
| 2971 | CVMX_USB_TRANSFER_INTERRUPT) |
| 2972 | pipe->next_tx_frame += |
| 2973 | pipe->interval; |
| 2974 | __cvmx_usb_perform_complete( |
| 2975 | usb, |
| 2976 | pipe, |
| 2977 | transaction, |
| 2978 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2979 | } |
| 2980 | } |
| 2981 | } else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2982 | if ((pipe->device_speed == |
| 2983 | CVMX_USB_SPEED_HIGH) && |
| 2984 | (pipe->transfer_type == |
| 2985 | CVMX_USB_TRANSFER_BULK) && |
| 2986 | (pipe->transfer_dir == |
| 2987 | CVMX_USB_DIRECTION_OUT) && |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 2988 | (usbc_hcint.s.nak)) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 2989 | pipe->flags |= |
| 2990 | __CVMX_USB_PIPE_FLAGS_NEED_PING; |
| 2991 | if (!buffer_space_left || |
| 2992 | (bytes_in_last_packet < |
| 2993 | pipe->max_packet)) { |
| 2994 | if (transaction->type == |
| 2995 | CVMX_USB_TRANSFER_INTERRUPT) |
| 2996 | pipe->next_tx_frame += |
| 2997 | pipe->interval; |
| 2998 | __cvmx_usb_perform_complete(usb, |
| 2999 | pipe, |
| 3000 | transaction, |
| 3001 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3002 | } |
| 3003 | } |
| 3004 | break; |
| 3005 | case CVMX_USB_TRANSFER_ISOCHRONOUS: |
| 3006 | if (__cvmx_usb_pipe_needs_split(usb, pipe)) { |
| 3007 | /* |
| 3008 | * ISOCHRONOUS OUT splits don't require a |
| 3009 | * complete split stage. Instead they use a |
| 3010 | * sequence of begin OUT splits to transfer the |
| 3011 | * data 188 bytes at a time. Once the transfer |
| 3012 | * is complete, the pipe sleeps until the next |
| 3013 | * schedule interval |
| 3014 | */ |
| 3015 | if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) { |
| 3016 | /* |
| 3017 | * If no space left or this wasn't a max |
| 3018 | * size packet then this transfer is |
| 3019 | * complete. Otherwise start it again to |
| 3020 | * send the next 188 bytes |
| 3021 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3022 | if (!buffer_space_left || |
| 3023 | (bytes_this_transfer < 188)) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3024 | pipe->next_tx_frame += pipe->interval; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3025 | __cvmx_usb_perform_complete( |
| 3026 | usb, |
| 3027 | pipe, |
| 3028 | transaction, |
| 3029 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3030 | } |
| 3031 | } else { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3032 | if (transaction->stage == |
| 3033 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) { |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3034 | /* |
| 3035 | * We are in the incoming data |
| 3036 | * phase. Keep getting data |
| 3037 | * until we run out of space or |
| 3038 | * get a small packet |
| 3039 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3040 | if ((buffer_space_left == 0) || |
| 3041 | (bytes_in_last_packet < |
| 3042 | pipe->max_packet)) { |
| 3043 | pipe->next_tx_frame += |
| 3044 | pipe->interval; |
| 3045 | __cvmx_usb_perform_complete( |
| 3046 | usb, |
| 3047 | pipe, |
| 3048 | transaction, |
| 3049 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3050 | } |
| 3051 | } else |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3052 | transaction->stage = |
| 3053 | CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3054 | } |
| 3055 | } else { |
| 3056 | pipe->next_tx_frame += pipe->interval; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3057 | __cvmx_usb_perform_complete(usb, |
| 3058 | pipe, |
| 3059 | transaction, |
| 3060 | CVMX_USB_COMPLETE_SUCCESS); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3061 | } |
| 3062 | break; |
| 3063 | } |
| 3064 | } else if (usbc_hcint.s.nak) { |
| 3065 | /* |
| 3066 | * If this was a split then clear our split in progress marker. |
| 3067 | */ |
| 3068 | if (usb->active_split == transaction) |
| 3069 | usb->active_split = NULL; |
| 3070 | /* |
| 3071 | * NAK as a response means the device couldn't accept the |
| 3072 | * transaction, but it should be retried in the future. Rewind |
| 3073 | * to the beginning of the transaction by anding off the split |
| 3074 | * complete bit. Retry in the next interval |
| 3075 | */ |
| 3076 | transaction->retries = 0; |
| 3077 | transaction->stage &= ~1; |
| 3078 | pipe->next_tx_frame += pipe->interval; |
| 3079 | if (pipe->next_tx_frame < usb->frame_number) |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3080 | pipe->next_tx_frame = usb->frame_number + |
| 3081 | pipe->interval - |
| 3082 | (usb->frame_number - pipe->next_tx_frame) % |
| 3083 | pipe->interval; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3084 | } else { |
| 3085 | struct cvmx_usb_port_status port; |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 3086 | port = cvmx_usb_get_status(usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3087 | if (port.port_enabled) { |
| 3088 | /* We'll retry the exact same transaction again */ |
| 3089 | transaction->retries++; |
| 3090 | } else { |
| 3091 | /* |
| 3092 | * We get channel halted interrupts with no result bits |
| 3093 | * sets when the cable is unplugged |
| 3094 | */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3095 | __cvmx_usb_perform_complete(usb, pipe, transaction, |
| 3096 | CVMX_USB_COMPLETE_ERROR); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3097 | } |
| 3098 | } |
| 3099 | return 0; |
| 3100 | } |
| 3101 | |
Aaro Koskinen | 393e214 | 2013-10-06 22:22:27 +0300 | [diff] [blame] | 3102 | static void octeon_usb_port_callback(struct cvmx_usb_state *usb) |
| 3103 | { |
| 3104 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 3105 | |
| 3106 | spin_unlock(&priv->lock); |
| 3107 | usb_hcd_poll_rh_status(octeon_to_hcd(priv)); |
| 3108 | spin_lock(&priv->lock); |
| 3109 | } |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3110 | |
| 3111 | /** |
| 3112 | * Poll the USB block for status and call all needed callback |
| 3113 | * handlers. This function is meant to be called in the interrupt |
| 3114 | * handler for the USB controller. It can also be called |
| 3115 | * periodically in a loop for non-interrupt based operation. |
| 3116 | * |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 3117 | * @usb: USB device state populated by cvmx_usb_initialize(). |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3118 | * |
| 3119 | * Returns: 0 or a negative error code. |
| 3120 | */ |
Aaro Koskinen | cb61c60 | 2013-10-06 22:22:25 +0300 | [diff] [blame] | 3121 | static int cvmx_usb_poll(struct cvmx_usb_state *usb) |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3122 | { |
| 3123 | union cvmx_usbcx_hfnum usbc_hfnum; |
| 3124 | union cvmx_usbcx_gintsts usbc_gintsts; |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3125 | |
| 3126 | CVMX_PREFETCH(usb, 0); |
| 3127 | CVMX_PREFETCH(usb, 1*128); |
| 3128 | CVMX_PREFETCH(usb, 2*128); |
| 3129 | CVMX_PREFETCH(usb, 3*128); |
| 3130 | CVMX_PREFETCH(usb, 4*128); |
| 3131 | |
| 3132 | /* Update the frame counter */ |
| 3133 | usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index)); |
| 3134 | if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum) |
| 3135 | usb->frame_number += 0x4000; |
| 3136 | usb->frame_number &= ~0x3fffull; |
| 3137 | usb->frame_number |= usbc_hfnum.s.frnum; |
| 3138 | |
| 3139 | /* Read the pending interrupts */ |
| 3140 | usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index)); |
| 3141 | |
| 3142 | /* Clear the interrupts now that we know about them */ |
| 3143 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32); |
| 3144 | |
| 3145 | if (usbc_gintsts.s.rxflvl) { |
| 3146 | /* |
| 3147 | * RxFIFO Non-Empty (RxFLvl) |
| 3148 | * Indicates that there is at least one packet pending to be |
| 3149 | * read from the RxFIFO. |
| 3150 | * |
| 3151 | * In DMA mode this is handled by hardware |
| 3152 | */ |
| 3153 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
| 3154 | __cvmx_usb_poll_rx_fifo(usb); |
| 3155 | } |
| 3156 | if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) { |
| 3157 | /* Fill the Tx FIFOs when not in DMA mode */ |
| 3158 | if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) |
| 3159 | __cvmx_usb_poll_tx_fifo(usb); |
| 3160 | } |
| 3161 | if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) { |
| 3162 | union cvmx_usbcx_hprt usbc_hprt; |
| 3163 | /* |
| 3164 | * Disconnect Detected Interrupt (DisconnInt) |
| 3165 | * Asserted when a device disconnect is detected. |
| 3166 | * |
| 3167 | * Host Port Interrupt (PrtInt) |
| 3168 | * The core sets this bit to indicate a change in port status of |
| 3169 | * one of the O2P USB core ports in Host mode. The application |
| 3170 | * must read the Host Port Control and Status (HPRT) register to |
| 3171 | * determine the exact event that caused this interrupt. The |
| 3172 | * application must clear the appropriate status bit in the Host |
| 3173 | * Port Control and Status register to clear this bit. |
| 3174 | * |
| 3175 | * Call the user's port callback |
| 3176 | */ |
Aaro Koskinen | 393e214 | 2013-10-06 22:22:27 +0300 | [diff] [blame] | 3177 | octeon_usb_port_callback(usb); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3178 | /* Clear the port change bits */ |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3179 | usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, |
| 3180 | CVMX_USBCX_HPRT(usb->index)); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3181 | usbc_hprt.s.prtena = 0; |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3182 | __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), |
| 3183 | usbc_hprt.u32); |
Aaro Koskinen | 6570b4a | 2013-10-06 22:22:24 +0300 | [diff] [blame] | 3184 | } |
| 3185 | if (usbc_gintsts.s.hchint) { |
| 3186 | /* |
| 3187 | * Host Channels Interrupt (HChInt) |
| 3188 | * The core sets this bit to indicate that an interrupt is |
| 3189 | * pending on one of the channels of the core (in Host mode). |
| 3190 | * The application must read the Host All Channels Interrupt |
| 3191 | * (HAINT) register to determine the exact number of the channel |
| 3192 | * on which the interrupt occurred, and then read the |
| 3193 | * corresponding Host Channel-n Interrupt (HCINTn) register to |
| 3194 | * determine the exact cause of the interrupt. The application |
| 3195 | * must clear the appropriate status bit in the HCINTn register |
| 3196 | * to clear this bit. |
| 3197 | */ |
| 3198 | union cvmx_usbcx_haint usbc_haint; |
| 3199 | usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index)); |
| 3200 | while (usbc_haint.u32) { |
| 3201 | int channel; |
| 3202 | |
| 3203 | channel = __fls(usbc_haint.u32); |
| 3204 | __cvmx_usb_poll_channel(usb, channel); |
| 3205 | usbc_haint.u32 ^= 1<<channel; |
| 3206 | } |
| 3207 | } |
| 3208 | |
| 3209 | __cvmx_usb_schedule(usb, usbc_gintsts.s.sof); |
| 3210 | |
| 3211 | return 0; |
| 3212 | } |
| 3213 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3214 | /* convert between an HCD pointer and the corresponding struct octeon_hcd */ |
| 3215 | static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd) |
| 3216 | { |
| 3217 | return (struct octeon_hcd *)(hcd->hcd_priv); |
| 3218 | } |
| 3219 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3220 | static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd) |
| 3221 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3222 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 3223 | unsigned long flags; |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3224 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3225 | spin_lock_irqsave(&priv->lock, flags); |
| 3226 | cvmx_usb_poll(&priv->usb); |
| 3227 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3228 | return IRQ_HANDLED; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3229 | } |
| 3230 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3231 | static int octeon_usb_start(struct usb_hcd *hcd) |
| 3232 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3233 | hcd->state = HC_STATE_RUNNING; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3234 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3235 | } |
| 3236 | |
| 3237 | static void octeon_usb_stop(struct usb_hcd *hcd) |
| 3238 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3239 | hcd->state = HC_STATE_HALT; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3240 | } |
| 3241 | |
| 3242 | static int octeon_usb_get_frame_number(struct usb_hcd *hcd) |
| 3243 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3244 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3245 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3246 | return cvmx_usb_get_frame_number(&priv->usb); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3247 | } |
| 3248 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3249 | static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3250 | struct urb *urb, |
| 3251 | gfp_t mem_flags) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3252 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3253 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3254 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3255 | struct cvmx_usb_transaction *transaction = NULL; |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3256 | struct cvmx_usb_pipe *pipe; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3257 | unsigned long flags; |
Aaro Koskinen | 6e0e1b0 | 2013-07-30 23:43:04 +0300 | [diff] [blame] | 3258 | struct cvmx_usb_iso_packet *iso_packet; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3259 | struct usb_host_endpoint *ep = urb->ep; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3260 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3261 | urb->status = 0; |
| 3262 | INIT_LIST_HEAD(&urb->urb_list); /* not enqueued on dequeue_list */ |
| 3263 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3264 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3265 | if (!ep->hcpriv) { |
Aaro Koskinen | 394d4e0 | 2013-07-30 23:42:54 +0300 | [diff] [blame] | 3266 | enum cvmx_usb_transfer transfer_type; |
Aaro Koskinen | 4918072 | 2013-07-30 23:42:53 +0300 | [diff] [blame] | 3267 | enum cvmx_usb_speed speed; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3268 | int split_device = 0; |
| 3269 | int split_port = 0; |
| 3270 | switch (usb_pipetype(urb->pipe)) { |
| 3271 | case PIPE_ISOCHRONOUS: |
| 3272 | transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS; |
| 3273 | break; |
| 3274 | case PIPE_INTERRUPT: |
| 3275 | transfer_type = CVMX_USB_TRANSFER_INTERRUPT; |
| 3276 | break; |
| 3277 | case PIPE_CONTROL: |
| 3278 | transfer_type = CVMX_USB_TRANSFER_CONTROL; |
| 3279 | break; |
| 3280 | default: |
| 3281 | transfer_type = CVMX_USB_TRANSFER_BULK; |
| 3282 | break; |
| 3283 | } |
| 3284 | switch (urb->dev->speed) { |
| 3285 | case USB_SPEED_LOW: |
| 3286 | speed = CVMX_USB_SPEED_LOW; |
| 3287 | break; |
| 3288 | case USB_SPEED_FULL: |
| 3289 | speed = CVMX_USB_SPEED_FULL; |
| 3290 | break; |
| 3291 | default: |
| 3292 | speed = CVMX_USB_SPEED_HIGH; |
| 3293 | break; |
| 3294 | } |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3295 | /* |
| 3296 | * For slow devices on high speed ports we need to find the hub |
| 3297 | * that does the speed translation so we know where to send the |
| 3298 | * split transactions. |
| 3299 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3300 | if (speed != CVMX_USB_SPEED_HIGH) { |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3301 | /* |
| 3302 | * Start at this device and work our way up the usb |
| 3303 | * tree. |
| 3304 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3305 | struct usb_device *dev = urb->dev; |
| 3306 | while (dev->parent) { |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3307 | /* |
| 3308 | * If our parent is high speed then he'll |
| 3309 | * receive the splits. |
| 3310 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3311 | if (dev->parent->speed == USB_SPEED_HIGH) { |
| 3312 | split_device = dev->parent->devnum; |
| 3313 | split_port = dev->portnum; |
| 3314 | break; |
| 3315 | } |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3316 | /* |
| 3317 | * Move up the tree one level. If we make it all |
| 3318 | * the way up the tree, then the port must not |
| 3319 | * be in high speed mode and we don't need a |
| 3320 | * split. |
| 3321 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3322 | dev = dev->parent; |
| 3323 | } |
| 3324 | } |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3325 | pipe = cvmx_usb_open_pipe(&priv->usb, usb_pipedevice(urb->pipe), |
| 3326 | usb_pipeendpoint(urb->pipe), speed, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3327 | le16_to_cpu(ep->desc.wMaxPacketSize) |
| 3328 | & 0x7ff, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3329 | transfer_type, |
| 3330 | usb_pipein(urb->pipe) ? |
| 3331 | CVMX_USB_DIRECTION_IN : |
| 3332 | CVMX_USB_DIRECTION_OUT, |
| 3333 | urb->interval, |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3334 | (le16_to_cpu(ep->desc.wMaxPacketSize) |
| 3335 | >> 11) & 0x3, |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3336 | split_device, split_port); |
| 3337 | if (!pipe) { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3338 | spin_unlock_irqrestore(&priv->lock, flags); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3339 | dev_dbg(dev, "Failed to create pipe\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3340 | return -ENOMEM; |
| 3341 | } |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3342 | ep->hcpriv = pipe; |
Aaro Koskinen | c7609ea | 2013-06-13 01:00:33 +0300 | [diff] [blame] | 3343 | } else { |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3344 | pipe = ep->hcpriv; |
Aaro Koskinen | c7609ea | 2013-06-13 01:00:33 +0300 | [diff] [blame] | 3345 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3346 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3347 | switch (usb_pipetype(urb->pipe)) { |
| 3348 | case PIPE_ISOCHRONOUS: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3349 | dev_dbg(dev, "Submit isochronous to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3350 | usb_pipedevice(urb->pipe), |
| 3351 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3352 | /* |
| 3353 | * Allocate a structure to use for our private list of |
| 3354 | * isochronous packets. |
| 3355 | */ |
Aaro Koskinen | 6e0e1b0 | 2013-07-30 23:43:04 +0300 | [diff] [blame] | 3356 | iso_packet = kmalloc(urb->number_of_packets * |
| 3357 | sizeof(struct cvmx_usb_iso_packet), |
| 3358 | GFP_ATOMIC); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3359 | if (iso_packet) { |
| 3360 | int i; |
| 3361 | /* Fill the list with the data from the URB */ |
| 3362 | for (i = 0; i < urb->number_of_packets; i++) { |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3363 | iso_packet[i].offset = |
| 3364 | urb->iso_frame_desc[i].offset; |
| 3365 | iso_packet[i].length = |
| 3366 | urb->iso_frame_desc[i].length; |
| 3367 | iso_packet[i].status = |
| 3368 | CVMX_USB_COMPLETE_ERROR; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3369 | } |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3370 | /* |
| 3371 | * Store a pointer to the list in the URB setup_packet |
| 3372 | * field. We know this currently isn't being used and |
| 3373 | * this saves us a bunch of logic. |
| 3374 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3375 | urb->setup_packet = (char *)iso_packet; |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3376 | transaction = cvmx_usb_submit_isochronous(&priv->usb, |
| 3377 | pipe, urb); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3378 | /* |
| 3379 | * If submit failed we need to free our private packet |
| 3380 | * list. |
| 3381 | */ |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3382 | if (!transaction) { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3383 | urb->setup_packet = NULL; |
| 3384 | kfree(iso_packet); |
| 3385 | } |
| 3386 | } |
| 3387 | break; |
| 3388 | case PIPE_INTERRUPT: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3389 | dev_dbg(dev, "Submit interrupt to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3390 | usb_pipedevice(urb->pipe), |
| 3391 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3392 | transaction = cvmx_usb_submit_interrupt(&priv->usb, pipe, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3393 | break; |
| 3394 | case PIPE_CONTROL: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3395 | dev_dbg(dev, "Submit control to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3396 | usb_pipedevice(urb->pipe), |
| 3397 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3398 | transaction = cvmx_usb_submit_control(&priv->usb, pipe, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3399 | break; |
| 3400 | case PIPE_BULK: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3401 | dev_dbg(dev, "Submit bulk to %d.%d\n", |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3402 | usb_pipedevice(urb->pipe), |
| 3403 | usb_pipeendpoint(urb->pipe)); |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3404 | transaction = cvmx_usb_submit_bulk(&priv->usb, pipe, urb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3405 | break; |
| 3406 | } |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3407 | if (!transaction) { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3408 | spin_unlock_irqrestore(&priv->lock, flags); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3409 | dev_dbg(dev, "Failed to submit\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3410 | return -ENOMEM; |
| 3411 | } |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3412 | urb->hcpriv = transaction; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3413 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3414 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3415 | } |
| 3416 | |
| 3417 | static void octeon_usb_urb_dequeue_work(unsigned long arg) |
| 3418 | { |
Aaro Koskinen | f011fef | 2013-10-10 23:25:34 +0300 | [diff] [blame] | 3419 | struct urb *urb; |
| 3420 | struct urb *next; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3421 | unsigned long flags; |
| 3422 | struct octeon_hcd *priv = (struct octeon_hcd *)arg; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3423 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3424 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3425 | |
Aaro Koskinen | f011fef | 2013-10-10 23:25:34 +0300 | [diff] [blame] | 3426 | list_for_each_entry_safe(urb, next, &priv->dequeue_list, urb_list) { |
Aaro Koskinen | 244544a | 2013-10-10 23:25:33 +0300 | [diff] [blame] | 3427 | list_del_init(&urb->urb_list); |
Aaro Koskinen | 3e1674c | 2013-10-06 22:22:36 +0300 | [diff] [blame] | 3428 | cvmx_usb_cancel(&priv->usb, urb->ep->hcpriv, urb->hcpriv); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3429 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3430 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3431 | spin_unlock_irqrestore(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3432 | } |
| 3433 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3434 | static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, |
| 3435 | struct urb *urb, |
| 3436 | int status) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3437 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3438 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 3439 | unsigned long flags; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3440 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3441 | if (!urb->dev) |
| 3442 | return -EINVAL; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3443 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3444 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3445 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3446 | urb->status = status; |
| 3447 | list_add_tail(&urb->urb_list, &priv->dequeue_list); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3448 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3449 | spin_unlock_irqrestore(&priv->lock, flags); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3450 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3451 | tasklet_schedule(&priv->dequeue_tasklet); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3452 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3453 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3454 | } |
| 3455 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3456 | static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, |
| 3457 | struct usb_host_endpoint *ep) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3458 | { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3459 | struct device *dev = hcd->self.controller; |
| 3460 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3461 | if (ep->hcpriv) { |
| 3462 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3463 | struct cvmx_usb_pipe *pipe = ep->hcpriv; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3464 | unsigned long flags; |
| 3465 | spin_lock_irqsave(&priv->lock, flags); |
Aaro Koskinen | 60f8150 | 2013-10-06 22:22:35 +0300 | [diff] [blame] | 3466 | cvmx_usb_cancel_all(&priv->usb, pipe); |
| 3467 | if (cvmx_usb_close_pipe(&priv->usb, pipe)) |
| 3468 | dev_dbg(dev, "Closing pipe %p failed\n", pipe); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3469 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3470 | ep->hcpriv = NULL; |
| 3471 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3472 | } |
| 3473 | |
| 3474 | static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf) |
| 3475 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3476 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 51a1962 | 2013-07-30 23:43:03 +0300 | [diff] [blame] | 3477 | struct cvmx_usb_port_status port_status; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3478 | unsigned long flags; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3479 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3480 | spin_lock_irqsave(&priv->lock, flags); |
| 3481 | port_status = cvmx_usb_get_status(&priv->usb); |
| 3482 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3483 | buf[0] = 0; |
| 3484 | buf[0] = port_status.connect_change << 1; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3485 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3486 | return (buf[0] != 0); |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3487 | } |
| 3488 | |
| 3489 | static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength) |
| 3490 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3491 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3492 | struct device *dev = hcd->self.controller; |
Aaro Koskinen | 51a1962 | 2013-07-30 23:43:03 +0300 | [diff] [blame] | 3493 | struct cvmx_usb_port_status usb_port_status; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3494 | int port_status; |
| 3495 | struct usb_hub_descriptor *desc; |
| 3496 | unsigned long flags; |
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 | switch (typeReq) { |
| 3499 | case ClearHubFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3500 | dev_dbg(dev, "ClearHubFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3501 | switch (wValue) { |
| 3502 | case C_HUB_LOCAL_POWER: |
| 3503 | case C_HUB_OVER_CURRENT: |
| 3504 | /* Nothing required here */ |
| 3505 | break; |
| 3506 | default: |
| 3507 | return -EINVAL; |
| 3508 | } |
| 3509 | break; |
| 3510 | case ClearPortFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3511 | dev_dbg(dev, "ClearPortFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3512 | if (wIndex != 1) { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3513 | dev_dbg(dev, " INVALID\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3514 | return -EINVAL; |
| 3515 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3516 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3517 | switch (wValue) { |
| 3518 | case USB_PORT_FEAT_ENABLE: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3519 | dev_dbg(dev, " ENABLE\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3520 | spin_lock_irqsave(&priv->lock, flags); |
| 3521 | cvmx_usb_disable(&priv->usb); |
| 3522 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3523 | break; |
| 3524 | case USB_PORT_FEAT_SUSPEND: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3525 | dev_dbg(dev, " SUSPEND\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3526 | /* Not supported on Octeon */ |
| 3527 | break; |
| 3528 | case USB_PORT_FEAT_POWER: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3529 | dev_dbg(dev, " POWER\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3530 | /* Not supported on Octeon */ |
| 3531 | break; |
| 3532 | case USB_PORT_FEAT_INDICATOR: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3533 | dev_dbg(dev, " INDICATOR\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3534 | /* Port inidicator not supported */ |
| 3535 | break; |
| 3536 | case USB_PORT_FEAT_C_CONNECTION: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3537 | dev_dbg(dev, " C_CONNECTION\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3538 | /* Clears drivers internal connect status change flag */ |
| 3539 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3540 | priv->usb.port_status = |
| 3541 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3542 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3543 | break; |
| 3544 | case USB_PORT_FEAT_C_RESET: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3545 | dev_dbg(dev, " C_RESET\n"); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3546 | /* |
| 3547 | * Clears the driver's internal Port Reset Change flag. |
| 3548 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3549 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3550 | priv->usb.port_status = |
| 3551 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3552 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3553 | break; |
| 3554 | case USB_PORT_FEAT_C_ENABLE: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3555 | dev_dbg(dev, " C_ENABLE\n"); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3556 | /* |
| 3557 | * Clears the driver's internal Port Enable/Disable |
| 3558 | * Change flag. |
| 3559 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3560 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3561 | priv->usb.port_status = |
| 3562 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3563 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3564 | break; |
| 3565 | case USB_PORT_FEAT_C_SUSPEND: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3566 | dev_dbg(dev, " C_SUSPEND\n"); |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3567 | /* |
| 3568 | * Clears the driver's internal Port Suspend Change |
| 3569 | * flag, which is set when resume signaling on the host |
| 3570 | * port is complete. |
| 3571 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3572 | break; |
| 3573 | case USB_PORT_FEAT_C_OVER_CURRENT: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3574 | dev_dbg(dev, " C_OVER_CURRENT\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3575 | /* Clears the driver's overcurrent Change flag */ |
| 3576 | spin_lock_irqsave(&priv->lock, flags); |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3577 | priv->usb.port_status = |
| 3578 | cvmx_usb_get_status(&priv->usb); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3579 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3580 | break; |
| 3581 | default: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3582 | dev_dbg(dev, " UNKNOWN\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3583 | return -EINVAL; |
| 3584 | } |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3585 | break; |
| 3586 | case GetHubDescriptor: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3587 | dev_dbg(dev, "GetHubDescriptor\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3588 | desc = (struct usb_hub_descriptor *)buf; |
| 3589 | desc->bDescLength = 9; |
| 3590 | desc->bDescriptorType = 0x29; |
| 3591 | desc->bNbrPorts = 1; |
| 3592 | desc->wHubCharacteristics = 0x08; |
| 3593 | desc->bPwrOn2PwrGood = 1; |
| 3594 | desc->bHubContrCurrent = 0; |
| 3595 | desc->u.hs.DeviceRemovable[0] = 0; |
| 3596 | desc->u.hs.DeviceRemovable[1] = 0xff; |
| 3597 | break; |
| 3598 | case GetHubStatus: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3599 | dev_dbg(dev, "GetHubStatus\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3600 | *(__le32 *) buf = 0; |
| 3601 | break; |
| 3602 | case GetPortStatus: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3603 | dev_dbg(dev, "GetPortStatus\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3604 | if (wIndex != 1) { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3605 | dev_dbg(dev, " INVALID\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3606 | return -EINVAL; |
| 3607 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3608 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3609 | spin_lock_irqsave(&priv->lock, flags); |
| 3610 | usb_port_status = cvmx_usb_get_status(&priv->usb); |
| 3611 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3612 | port_status = 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3613 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3614 | if (usb_port_status.connect_change) { |
| 3615 | port_status |= (1 << USB_PORT_FEAT_C_CONNECTION); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3616 | dev_dbg(dev, " C_CONNECTION\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3617 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3618 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3619 | if (usb_port_status.port_enabled) { |
| 3620 | port_status |= (1 << USB_PORT_FEAT_C_ENABLE); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3621 | dev_dbg(dev, " C_ENABLE\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3622 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3623 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3624 | if (usb_port_status.connected) { |
| 3625 | port_status |= (1 << USB_PORT_FEAT_CONNECTION); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3626 | dev_dbg(dev, " CONNECTION\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3627 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3628 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3629 | if (usb_port_status.port_enabled) { |
| 3630 | port_status |= (1 << USB_PORT_FEAT_ENABLE); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3631 | dev_dbg(dev, " ENABLE\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3632 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3633 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3634 | if (usb_port_status.port_over_current) { |
| 3635 | port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3636 | dev_dbg(dev, " OVER_CURRENT\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3637 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3638 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3639 | if (usb_port_status.port_powered) { |
| 3640 | port_status |= (1 << USB_PORT_FEAT_POWER); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3641 | dev_dbg(dev, " POWER\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3642 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3643 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3644 | if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH) { |
| 3645 | port_status |= USB_PORT_STAT_HIGH_SPEED; |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3646 | dev_dbg(dev, " HIGHSPEED\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3647 | } else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW) { |
| 3648 | port_status |= (1 << USB_PORT_FEAT_LOWSPEED); |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3649 | dev_dbg(dev, " LOWSPEED\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3650 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3651 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3652 | *((__le32 *) buf) = cpu_to_le32(port_status); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3653 | break; |
| 3654 | case SetHubFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3655 | dev_dbg(dev, "SetHubFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3656 | /* No HUB features supported */ |
| 3657 | break; |
| 3658 | case SetPortFeature: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3659 | dev_dbg(dev, "SetPortFeature\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3660 | if (wIndex != 1) { |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3661 | dev_dbg(dev, " INVALID\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3662 | return -EINVAL; |
| 3663 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3664 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3665 | switch (wValue) { |
| 3666 | case USB_PORT_FEAT_SUSPEND: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3667 | dev_dbg(dev, " SUSPEND\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3668 | return -EINVAL; |
| 3669 | case USB_PORT_FEAT_POWER: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3670 | dev_dbg(dev, " POWER\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3671 | return -EINVAL; |
| 3672 | case USB_PORT_FEAT_RESET: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3673 | dev_dbg(dev, " RESET\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3674 | spin_lock_irqsave(&priv->lock, flags); |
| 3675 | cvmx_usb_disable(&priv->usb); |
| 3676 | if (cvmx_usb_enable(&priv->usb)) |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3677 | dev_dbg(dev, "Failed to enable the port\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3678 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3679 | return 0; |
| 3680 | case USB_PORT_FEAT_INDICATOR: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3681 | dev_dbg(dev, " INDICATOR\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3682 | /* Not supported */ |
| 3683 | break; |
| 3684 | default: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3685 | dev_dbg(dev, " UNKNOWN\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3686 | return -EINVAL; |
| 3687 | } |
| 3688 | break; |
| 3689 | default: |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3690 | dev_dbg(dev, "Unknown root hub request\n"); |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3691 | return -EINVAL; |
| 3692 | } |
| 3693 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3694 | } |
| 3695 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3696 | static const struct hc_driver octeon_hc_driver = { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3697 | .description = "Octeon USB", |
| 3698 | .product_desc = "Octeon Host Controller", |
| 3699 | .hcd_priv_size = sizeof(struct octeon_hcd), |
| 3700 | .irq = octeon_usb_irq, |
| 3701 | .flags = HCD_MEMORY | HCD_USB2, |
| 3702 | .start = octeon_usb_start, |
| 3703 | .stop = octeon_usb_stop, |
| 3704 | .urb_enqueue = octeon_usb_urb_enqueue, |
| 3705 | .urb_dequeue = octeon_usb_urb_dequeue, |
| 3706 | .endpoint_disable = octeon_usb_endpoint_disable, |
| 3707 | .get_frame_number = octeon_usb_get_frame_number, |
| 3708 | .hub_status_data = octeon_usb_hub_status_data, |
| 3709 | .hub_control = octeon_usb_hub_control, |
Aaro Koskinen | 120ee59 | 2014-03-20 00:52:08 +0200 | [diff] [blame] | 3710 | .map_urb_for_dma = octeon_map_urb_for_dma, |
| 3711 | .unmap_urb_for_dma = octeon_unmap_urb_for_dma, |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3712 | }; |
| 3713 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3714 | static int octeon_usb_probe(struct platform_device *pdev) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3715 | { |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3716 | int status; |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3717 | int initialize_flags; |
| 3718 | int usb_num; |
| 3719 | struct resource *res_mem; |
| 3720 | struct device_node *usbn_node; |
| 3721 | int irq = platform_get_irq(pdev, 0); |
| 3722 | struct device *dev = &pdev->dev; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3723 | struct octeon_hcd *priv; |
| 3724 | struct usb_hcd *hcd; |
| 3725 | unsigned long flags; |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3726 | u32 clock_rate = 48000000; |
| 3727 | bool is_crystal_clock = false; |
| 3728 | const char *clock_type; |
| 3729 | int i; |
| 3730 | |
| 3731 | if (dev->of_node == NULL) { |
| 3732 | dev_err(dev, "Error: empty of_node\n"); |
| 3733 | return -ENXIO; |
| 3734 | } |
| 3735 | usbn_node = dev->of_node->parent; |
| 3736 | |
| 3737 | i = of_property_read_u32(usbn_node, |
| 3738 | "refclk-frequency", &clock_rate); |
| 3739 | if (i) { |
| 3740 | dev_err(dev, "No USBN \"refclk-frequency\"\n"); |
| 3741 | return -ENXIO; |
| 3742 | } |
| 3743 | switch (clock_rate) { |
| 3744 | case 12000000: |
| 3745 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ; |
| 3746 | break; |
| 3747 | case 24000000: |
| 3748 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ; |
| 3749 | break; |
| 3750 | case 48000000: |
| 3751 | initialize_flags = CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ; |
| 3752 | break; |
| 3753 | default: |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3754 | dev_err(dev, "Illebal USBN \"refclk-frequency\" %u\n", |
| 3755 | clock_rate); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3756 | return -ENXIO; |
| 3757 | |
| 3758 | } |
| 3759 | |
| 3760 | i = of_property_read_string(usbn_node, |
| 3761 | "refclk-type", &clock_type); |
| 3762 | |
| 3763 | if (!i && strcmp("crystal", clock_type) == 0) |
| 3764 | is_crystal_clock = true; |
| 3765 | |
| 3766 | if (is_crystal_clock) |
| 3767 | initialize_flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI; |
| 3768 | else |
| 3769 | initialize_flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND; |
| 3770 | |
| 3771 | res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 3772 | if (res_mem == NULL) { |
| 3773 | dev_err(dev, "found no memory resource\n"); |
| 3774 | return -ENXIO; |
| 3775 | } |
| 3776 | usb_num = (res_mem->start >> 44) & 1; |
| 3777 | |
| 3778 | if (irq < 0) { |
| 3779 | /* Defective device tree, but we know how to fix it. */ |
| 3780 | irq_hw_number_t hwirq = usb_num ? (1 << 6) + 17 : 56; |
| 3781 | irq = irq_create_mapping(NULL, hwirq); |
| 3782 | } |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3783 | |
Aaro Koskinen | 87e7e57 | 2013-06-18 02:36:19 +0300 | [diff] [blame] | 3784 | /* |
| 3785 | * Set the DMA mask to 64bits so we get buffers already translated for |
| 3786 | * DMA. |
| 3787 | */ |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3788 | dev->coherent_dma_mask = ~0; |
| 3789 | dev->dma_mask = &dev->coherent_dma_mask; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3790 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3791 | /* |
| 3792 | * Only cn52XX and cn56XX have DWC_OTG USB hardware and the |
| 3793 | * IOB priority registers. Under heavy network load USB |
| 3794 | * hardware can be starved by the IOB causing a crash. Give |
| 3795 | * it a priority boost if it has been waiting more than 400 |
| 3796 | * cycles to avoid this situation. |
| 3797 | * |
| 3798 | * Testing indicates that a cnt_val of 8192 is not sufficient, |
| 3799 | * but no failures are seen with 4096. We choose a value of |
| 3800 | * 400 to give a safety factor of 10. |
| 3801 | */ |
| 3802 | if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) { |
| 3803 | union cvmx_iob_n2c_l2c_pri_cnt pri_cnt; |
| 3804 | |
| 3805 | pri_cnt.u64 = 0; |
| 3806 | pri_cnt.s.cnt_enb = 1; |
| 3807 | pri_cnt.s.cnt_val = 400; |
| 3808 | cvmx_write_csr(CVMX_IOB_N2C_L2C_PRI_CNT, pri_cnt.u64); |
| 3809 | } |
| 3810 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3811 | hcd = usb_create_hcd(&octeon_hc_driver, dev, dev_name(dev)); |
| 3812 | if (!hcd) { |
| 3813 | dev_dbg(dev, "Failed to allocate memory for HCD\n"); |
| 3814 | return -1; |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3815 | } |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3816 | hcd->uses_new_polling = 1; |
| 3817 | priv = (struct octeon_hcd *)hcd->hcd_priv; |
| 3818 | |
| 3819 | spin_lock_init(&priv->lock); |
| 3820 | |
Raluca Oncioiu | 1da69aa | 2014-03-08 00:32:05 +0200 | [diff] [blame] | 3821 | tasklet_init(&priv->dequeue_tasklet, octeon_usb_urb_dequeue_work, |
| 3822 | (unsigned long)priv); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3823 | INIT_LIST_HEAD(&priv->dequeue_list); |
| 3824 | |
| 3825 | status = cvmx_usb_initialize(&priv->usb, usb_num, initialize_flags); |
| 3826 | if (status) { |
| 3827 | dev_dbg(dev, "USB initialization failed with %d\n", status); |
| 3828 | kfree(hcd); |
| 3829 | return -1; |
| 3830 | } |
| 3831 | |
| 3832 | /* This delay is needed for CN3010, but I don't know why... */ |
| 3833 | mdelay(10); |
| 3834 | |
| 3835 | spin_lock_irqsave(&priv->lock, flags); |
| 3836 | cvmx_usb_poll(&priv->usb); |
| 3837 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3838 | |
| 3839 | status = usb_add_hcd(hcd, irq, 0); |
| 3840 | if (status) { |
| 3841 | dev_dbg(dev, "USB add HCD failed with %d\n", status); |
| 3842 | kfree(hcd); |
| 3843 | return -1; |
| 3844 | } |
| 3845 | device_wakeup_enable(hcd->self.controller); |
| 3846 | |
| 3847 | dev_info(dev, "Registered HCD for port %d on irq %d\n", usb_num, irq); |
| 3848 | |
Aaro Koskinen | 771378b | 2013-06-13 01:00:31 +0300 | [diff] [blame] | 3849 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3850 | } |
| 3851 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3852 | static int octeon_usb_remove(struct platform_device *pdev) |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3853 | { |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3854 | int status; |
| 3855 | struct device *dev = &pdev->dev; |
| 3856 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 3857 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 3858 | unsigned long flags; |
Aaro Koskinen | 71e06db | 2013-06-18 02:36:17 +0300 | [diff] [blame] | 3859 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3860 | usb_remove_hcd(hcd); |
| 3861 | tasklet_kill(&priv->dequeue_tasklet); |
| 3862 | spin_lock_irqsave(&priv->lock, flags); |
| 3863 | status = cvmx_usb_shutdown(&priv->usb); |
| 3864 | spin_unlock_irqrestore(&priv->lock, flags); |
| 3865 | if (status) |
| 3866 | dev_dbg(dev, "USB shutdown failed with %d\n", status); |
| 3867 | |
| 3868 | kfree(hcd); |
| 3869 | |
| 3870 | return 0; |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3871 | } |
| 3872 | |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3873 | static struct of_device_id octeon_usb_match[] = { |
| 3874 | { |
| 3875 | .compatible = "cavium,octeon-5750-usbc", |
| 3876 | }, |
| 3877 | {}, |
| 3878 | }; |
| 3879 | |
| 3880 | static struct platform_driver octeon_usb_driver = { |
| 3881 | .driver = { |
| 3882 | .name = "OcteonUSB", |
| 3883 | .owner = THIS_MODULE, |
| 3884 | .of_match_table = octeon_usb_match, |
| 3885 | }, |
| 3886 | .probe = octeon_usb_probe, |
| 3887 | .remove = octeon_usb_remove, |
| 3888 | }; |
| 3889 | |
| 3890 | static int __init octeon_usb_driver_init(void) |
| 3891 | { |
| 3892 | if (usb_disabled()) |
| 3893 | return 0; |
| 3894 | |
| 3895 | return platform_driver_register(&octeon_usb_driver); |
| 3896 | } |
| 3897 | module_init(octeon_usb_driver_init); |
| 3898 | |
| 3899 | static void __exit octeon_usb_driver_exit(void) |
| 3900 | { |
| 3901 | if (usb_disabled()) |
| 3902 | return; |
| 3903 | |
| 3904 | platform_driver_unregister(&octeon_usb_driver); |
| 3905 | } |
| 3906 | module_exit(octeon_usb_driver_exit); |
| 3907 | |
Aaro Koskinen | b164935 | 2013-06-01 21:42:58 +0300 | [diff] [blame] | 3908 | MODULE_LICENSE("GPL"); |
David Daney | b91619c | 2014-02-03 19:39:01 +0200 | [diff] [blame] | 3909 | MODULE_AUTHOR("Cavium, Inc. <support@cavium.com>"); |
| 3910 | MODULE_DESCRIPTION("Cavium Inc. OCTEON USB Host driver."); |