Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Driver for OHCI 1394 controllers |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 3 | * |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 4 | * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software Foundation, |
| 18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
Stefan Richter | e524f61 | 2007-08-20 21:58:30 +0200 | [diff] [blame] | 21 | #include <linux/compiler.h> |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 22 | #include <linux/delay.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 23 | #include <linux/device.h> |
Andrew Morton | cf3e72f | 2006-12-27 14:36:37 -0800 | [diff] [blame] | 24 | #include <linux/dma-mapping.h> |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 25 | #include <linux/firewire.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 26 | #include <linux/firewire-constants.h> |
Stefan Richter | c26f023 | 2007-08-20 21:40:30 +0200 | [diff] [blame] | 27 | #include <linux/gfp.h> |
Stefan Richter | a7fb60d | 2007-08-20 21:41:22 +0200 | [diff] [blame] | 28 | #include <linux/init.h> |
| 29 | #include <linux/interrupt.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 30 | #include <linux/io.h> |
Stefan Richter | a7fb60d | 2007-08-20 21:41:22 +0200 | [diff] [blame] | 31 | #include <linux/kernel.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 32 | #include <linux/list.h> |
Al Viro | faa2fb4 | 2007-05-15 20:36:10 +0100 | [diff] [blame] | 33 | #include <linux/mm.h> |
Stefan Richter | a7fb60d | 2007-08-20 21:41:22 +0200 | [diff] [blame] | 34 | #include <linux/module.h> |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 35 | #include <linux/moduleparam.h> |
Stefan Richter | a7fb60d | 2007-08-20 21:41:22 +0200 | [diff] [blame] | 36 | #include <linux/pci.h> |
Stefan Richter | fc38379 | 2009-08-28 13:25:15 +0200 | [diff] [blame] | 37 | #include <linux/pci_ids.h> |
Stefan Richter | c26f023 | 2007-08-20 21:40:30 +0200 | [diff] [blame] | 38 | #include <linux/spinlock.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 39 | #include <linux/string.h> |
Andrew Morton | cf3e72f | 2006-12-27 14:36:37 -0800 | [diff] [blame] | 40 | |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 41 | #include <asm/byteorder.h> |
Stefan Richter | c26f023 | 2007-08-20 21:40:30 +0200 | [diff] [blame] | 42 | #include <asm/page.h> |
Stefan Richter | ee71c2f | 2007-08-25 14:08:19 +0200 | [diff] [blame] | 43 | #include <asm/system.h> |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 44 | |
Stefan Richter | ea8d006 | 2008-03-01 02:42:56 +0100 | [diff] [blame] | 45 | #ifdef CONFIG_PPC_PMAC |
| 46 | #include <asm/pmac_feature.h> |
| 47 | #endif |
| 48 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 49 | #include "core.h" |
| 50 | #include "ohci.h" |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 51 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 52 | #define DESCRIPTOR_OUTPUT_MORE 0 |
| 53 | #define DESCRIPTOR_OUTPUT_LAST (1 << 12) |
| 54 | #define DESCRIPTOR_INPUT_MORE (2 << 12) |
| 55 | #define DESCRIPTOR_INPUT_LAST (3 << 12) |
| 56 | #define DESCRIPTOR_STATUS (1 << 11) |
| 57 | #define DESCRIPTOR_KEY_IMMEDIATE (2 << 8) |
| 58 | #define DESCRIPTOR_PING (1 << 7) |
| 59 | #define DESCRIPTOR_YY (1 << 6) |
| 60 | #define DESCRIPTOR_NO_IRQ (0 << 4) |
| 61 | #define DESCRIPTOR_IRQ_ERROR (1 << 4) |
| 62 | #define DESCRIPTOR_IRQ_ALWAYS (3 << 4) |
| 63 | #define DESCRIPTOR_BRANCH_ALWAYS (3 << 2) |
| 64 | #define DESCRIPTOR_WAIT (3 << 0) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 65 | |
| 66 | struct descriptor { |
| 67 | __le16 req_count; |
| 68 | __le16 control; |
| 69 | __le32 data_address; |
| 70 | __le32 branch_address; |
| 71 | __le16 res_count; |
| 72 | __le16 transfer_status; |
| 73 | } __attribute__((aligned(16))); |
| 74 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 75 | #define CONTROL_SET(regs) (regs) |
| 76 | #define CONTROL_CLEAR(regs) ((regs) + 4) |
| 77 | #define COMMAND_PTR(regs) ((regs) + 12) |
| 78 | #define CONTEXT_MATCH(regs) ((regs) + 16) |
Kristian Høgsberg | 72e318e | 2007-02-06 14:49:31 -0500 | [diff] [blame] | 79 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 80 | struct ar_buffer { |
| 81 | struct descriptor descriptor; |
| 82 | struct ar_buffer *next; |
| 83 | __le32 data[0]; |
| 84 | }; |
| 85 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 86 | struct ar_context { |
| 87 | struct fw_ohci *ohci; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 88 | struct ar_buffer *current_buffer; |
| 89 | struct ar_buffer *last_buffer; |
| 90 | void *pointer; |
Kristian Høgsberg | 72e318e | 2007-02-06 14:49:31 -0500 | [diff] [blame] | 91 | u32 regs; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 92 | struct tasklet_struct tasklet; |
| 93 | }; |
| 94 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 95 | struct context; |
| 96 | |
| 97 | typedef int (*descriptor_callback_t)(struct context *ctx, |
| 98 | struct descriptor *d, |
| 99 | struct descriptor *last); |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 100 | |
| 101 | /* |
| 102 | * A buffer that contains a block of DMA-able coherent memory used for |
| 103 | * storing a portion of a DMA descriptor program. |
| 104 | */ |
| 105 | struct descriptor_buffer { |
| 106 | struct list_head list; |
| 107 | dma_addr_t buffer_bus; |
| 108 | size_t buffer_size; |
| 109 | size_t used; |
| 110 | struct descriptor buffer[0]; |
| 111 | }; |
| 112 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 113 | struct context { |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 114 | struct fw_ohci *ohci; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 115 | u32 regs; |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 116 | int total_allocation; |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 117 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 118 | /* |
| 119 | * List of page-sized buffers for storing DMA descriptors. |
| 120 | * Head of list contains buffers in use and tail of list contains |
| 121 | * free buffers. |
| 122 | */ |
| 123 | struct list_head buffer_list; |
| 124 | |
| 125 | /* |
| 126 | * Pointer to a buffer inside buffer_list that contains the tail |
| 127 | * end of the current DMA program. |
| 128 | */ |
| 129 | struct descriptor_buffer *buffer_tail; |
| 130 | |
| 131 | /* |
| 132 | * The descriptor containing the branch address of the first |
| 133 | * descriptor that has not yet been filled by the device. |
| 134 | */ |
| 135 | struct descriptor *last; |
| 136 | |
| 137 | /* |
| 138 | * The last descriptor in the DMA program. It contains the branch |
| 139 | * address that must be updated upon appending a new descriptor. |
| 140 | */ |
| 141 | struct descriptor *prev; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 142 | |
| 143 | descriptor_callback_t callback; |
| 144 | |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 145 | struct tasklet_struct tasklet; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 146 | }; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 147 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 148 | #define IT_HEADER_SY(v) ((v) << 0) |
| 149 | #define IT_HEADER_TCODE(v) ((v) << 4) |
| 150 | #define IT_HEADER_CHANNEL(v) ((v) << 8) |
| 151 | #define IT_HEADER_TAG(v) ((v) << 14) |
| 152 | #define IT_HEADER_SPEED(v) ((v) << 16) |
| 153 | #define IT_HEADER_DATA_LENGTH(v) ((v) << 16) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 154 | |
| 155 | struct iso_context { |
| 156 | struct fw_iso_context base; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 157 | struct context context; |
David Moore | 0642b65 | 2007-12-19 03:09:18 -0500 | [diff] [blame] | 158 | int excess_bytes; |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 159 | void *header; |
| 160 | size_t header_length; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 161 | }; |
| 162 | |
| 163 | #define CONFIG_ROM_SIZE 1024 |
| 164 | |
| 165 | struct fw_ohci { |
| 166 | struct fw_card card; |
| 167 | |
| 168 | __iomem char *registers; |
Kristian Høgsberg | e636fe2 | 2007-01-26 00:38:04 -0500 | [diff] [blame] | 169 | int node_id; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 170 | int generation; |
Stefan Richter | e09770d | 2008-03-11 02:23:29 +0100 | [diff] [blame] | 171 | int request_generation; /* for timestamping incoming requests */ |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 172 | unsigned quirks; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 173 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 174 | /* |
| 175 | * Spinlock for accessing fw_ohci data. Never call out of |
| 176 | * this driver with this lock held. |
| 177 | */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 178 | spinlock_t lock; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 179 | |
| 180 | struct ar_context ar_request_ctx; |
| 181 | struct ar_context ar_response_ctx; |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 182 | struct context at_request_ctx; |
| 183 | struct context at_response_ctx; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 184 | |
| 185 | u32 it_context_mask; |
| 186 | struct iso_context *it_context_list; |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 187 | u64 ir_context_channels; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 188 | u32 ir_context_mask; |
| 189 | struct iso_context *ir_context_list; |
Stefan Richter | ecb1cf9 | 2010-02-21 17:57:32 +0100 | [diff] [blame] | 190 | |
| 191 | __be32 *config_rom; |
| 192 | dma_addr_t config_rom_bus; |
| 193 | __be32 *next_config_rom; |
| 194 | dma_addr_t next_config_rom_bus; |
| 195 | __be32 next_header; |
| 196 | |
| 197 | __le32 *self_id_cpu; |
| 198 | dma_addr_t self_id_bus; |
| 199 | struct tasklet_struct bus_reset_tasklet; |
| 200 | |
| 201 | u32 self_id_buffer[512]; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 202 | }; |
| 203 | |
Adrian Bunk | 95688e9 | 2007-01-22 19:17:37 +0100 | [diff] [blame] | 204 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 205 | { |
| 206 | return container_of(card, struct fw_ohci, card); |
| 207 | } |
| 208 | |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 209 | #define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 |
| 210 | #define IR_CONTEXT_BUFFER_FILL 0x80000000 |
| 211 | #define IR_CONTEXT_ISOCH_HEADER 0x40000000 |
| 212 | #define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000 |
| 213 | #define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000 |
| 214 | #define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000 |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 215 | |
| 216 | #define CONTEXT_RUN 0x8000 |
| 217 | #define CONTEXT_WAKE 0x1000 |
| 218 | #define CONTEXT_DEAD 0x0800 |
| 219 | #define CONTEXT_ACTIVE 0x0400 |
| 220 | |
Stefan Richter | 8b7b6af | 2009-01-20 19:10:58 +0100 | [diff] [blame] | 221 | #define OHCI1394_MAX_AT_REQ_RETRIES 0xf |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 222 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 |
| 223 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 |
| 224 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 225 | #define OHCI1394_REGISTER_SIZE 0x800 |
| 226 | #define OHCI_LOOP_COUNT 500 |
| 227 | #define OHCI1394_PCI_HCI_Control 0x40 |
| 228 | #define SELF_ID_BUF_SIZE 0x800 |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 229 | #define OHCI_TCODE_PHY_PACKET 0x0e |
Kristian Høgsberg | e364cf4 | 2007-02-16 17:34:49 -0500 | [diff] [blame] | 230 | #define OHCI_VERSION_1_1 0x010010 |
Kristian Høgsberg | 0edeefd | 2007-01-26 00:38:49 -0500 | [diff] [blame] | 231 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 232 | static char ohci_driver_name[] = KBUILD_MODNAME; |
| 233 | |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 234 | #define PCI_DEVICE_ID_JMICRON_JMB38X_FW 0x2380 |
Clemens Ladisch | 8301b91 | 2010-03-17 11:07:55 +0100 | [diff] [blame] | 235 | #define PCI_DEVICE_ID_TI_TSB12LV22 0x8009 |
| 236 | |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 237 | #define QUIRK_CYCLE_TIMER 1 |
| 238 | #define QUIRK_RESET_PACKET 2 |
| 239 | #define QUIRK_BE_HEADERS 4 |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 240 | #define QUIRK_NO_1394A 8 |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 241 | #define QUIRK_NO_MSI 16 |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 242 | |
| 243 | /* In case of multiple matches in ohci_quirks[], only the first one is used. */ |
| 244 | static const struct { |
| 245 | unsigned short vendor, device, flags; |
| 246 | } ohci_quirks[] = { |
Clemens Ladisch | 8301b91 | 2010-03-17 11:07:55 +0100 | [diff] [blame] | 247 | {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV22, QUIRK_CYCLE_TIMER | |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 248 | QUIRK_RESET_PACKET | |
| 249 | QUIRK_NO_1394A}, |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 250 | {PCI_VENDOR_ID_TI, PCI_ANY_ID, QUIRK_RESET_PACKET}, |
| 251 | {PCI_VENDOR_ID_AL, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 252 | {PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_FW, QUIRK_NO_MSI}, |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 253 | {PCI_VENDOR_ID_NEC, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, |
| 254 | {PCI_VENDOR_ID_VIA, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, |
| 255 | {PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS}, |
| 256 | }; |
| 257 | |
Stefan Richter | 3e9cc2f | 2010-02-21 17:58:29 +0100 | [diff] [blame] | 258 | /* This overrides anything that was found in ohci_quirks[]. */ |
| 259 | static int param_quirks; |
| 260 | module_param_named(quirks, param_quirks, int, 0644); |
| 261 | MODULE_PARM_DESC(quirks, "Chip quirks (default = 0" |
| 262 | ", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER) |
| 263 | ", reset packet generation = " __stringify(QUIRK_RESET_PACKET) |
| 264 | ", AR/selfID endianess = " __stringify(QUIRK_BE_HEADERS) |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 265 | ", no 1394a enhancements = " __stringify(QUIRK_NO_1394A) |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 266 | ", disable MSI = " __stringify(QUIRK_NO_MSI) |
Stefan Richter | 3e9cc2f | 2010-02-21 17:58:29 +0100 | [diff] [blame] | 267 | ")"); |
| 268 | |
Stefan Richter | a007bb8 | 2008-04-07 22:33:35 +0200 | [diff] [blame] | 269 | #define OHCI_PARAM_DEBUG_AT_AR 1 |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 270 | #define OHCI_PARAM_DEBUG_SELFIDS 2 |
Stefan Richter | a007bb8 | 2008-04-07 22:33:35 +0200 | [diff] [blame] | 271 | #define OHCI_PARAM_DEBUG_IRQS 4 |
| 272 | #define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */ |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 273 | |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 274 | #ifdef CONFIG_FIREWIRE_OHCI_DEBUG |
| 275 | |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 276 | static int param_debug; |
| 277 | module_param_named(debug, param_debug, int, 0644); |
| 278 | MODULE_PARM_DESC(debug, "Verbose logging (default = 0" |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 279 | ", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR) |
Stefan Richter | a007bb8 | 2008-04-07 22:33:35 +0200 | [diff] [blame] | 280 | ", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS) |
| 281 | ", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS) |
| 282 | ", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS) |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 283 | ", or a combination, or all = -1)"); |
| 284 | |
| 285 | static void log_irqs(u32 evt) |
| 286 | { |
Stefan Richter | a007bb8 | 2008-04-07 22:33:35 +0200 | [diff] [blame] | 287 | if (likely(!(param_debug & |
| 288 | (OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS)))) |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 289 | return; |
| 290 | |
Stefan Richter | a007bb8 | 2008-04-07 22:33:35 +0200 | [diff] [blame] | 291 | if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) && |
| 292 | !(evt & OHCI1394_busReset)) |
| 293 | return; |
| 294 | |
Stefan Richter | 168cf9a | 2010-02-14 18:49:18 +0100 | [diff] [blame] | 295 | fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt, |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 296 | evt & OHCI1394_selfIDComplete ? " selfID" : "", |
| 297 | evt & OHCI1394_RQPkt ? " AR_req" : "", |
| 298 | evt & OHCI1394_RSPkt ? " AR_resp" : "", |
| 299 | evt & OHCI1394_reqTxComplete ? " AT_req" : "", |
| 300 | evt & OHCI1394_respTxComplete ? " AT_resp" : "", |
| 301 | evt & OHCI1394_isochRx ? " IR" : "", |
| 302 | evt & OHCI1394_isochTx ? " IT" : "", |
| 303 | evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "", |
| 304 | evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "", |
Jay Fenlason | 5ed1f32 | 2009-11-17 12:29:17 -0500 | [diff] [blame] | 305 | evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "", |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 306 | evt & OHCI1394_regAccessFail ? " regAccessFail" : "", |
| 307 | evt & OHCI1394_busReset ? " busReset" : "", |
| 308 | evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt | |
| 309 | OHCI1394_RSPkt | OHCI1394_reqTxComplete | |
| 310 | OHCI1394_respTxComplete | OHCI1394_isochRx | |
| 311 | OHCI1394_isochTx | OHCI1394_postedWriteErr | |
Stefan Richter | 168cf9a | 2010-02-14 18:49:18 +0100 | [diff] [blame] | 312 | OHCI1394_cycleTooLong | OHCI1394_cycleInconsistent | |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 313 | OHCI1394_regAccessFail | OHCI1394_busReset) |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 314 | ? " ?" : ""); |
| 315 | } |
| 316 | |
| 317 | static const char *speed[] = { |
| 318 | [0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta", |
| 319 | }; |
| 320 | static const char *power[] = { |
| 321 | [0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W", |
| 322 | [4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W", |
| 323 | }; |
| 324 | static const char port[] = { '.', '-', 'p', 'c', }; |
| 325 | |
| 326 | static char _p(u32 *s, int shift) |
| 327 | { |
| 328 | return port[*s >> shift & 3]; |
| 329 | } |
| 330 | |
Stefan Richter | 08ddb2f | 2008-04-11 00:51:15 +0200 | [diff] [blame] | 331 | static void log_selfids(int node_id, int generation, int self_id_count, u32 *s) |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 332 | { |
| 333 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS))) |
| 334 | return; |
| 335 | |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 336 | fw_notify("%d selfIDs, generation %d, local node ID %04x\n", |
| 337 | self_id_count, generation, node_id); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 338 | |
| 339 | for (; self_id_count--; ++s) |
| 340 | if ((*s & 1 << 23) == 0) |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 341 | fw_notify("selfID 0: %08x, phy %d [%c%c%c] " |
| 342 | "%s gc=%d %s %s%s%s\n", |
| 343 | *s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2), |
| 344 | speed[*s >> 14 & 3], *s >> 16 & 63, |
| 345 | power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "", |
| 346 | *s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : ""); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 347 | else |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 348 | fw_notify("selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n", |
| 349 | *s, *s >> 24 & 63, |
| 350 | _p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10), |
| 351 | _p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2)); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | static const char *evts[] = { |
| 355 | [0x00] = "evt_no_status", [0x01] = "-reserved-", |
| 356 | [0x02] = "evt_long_packet", [0x03] = "evt_missing_ack", |
| 357 | [0x04] = "evt_underrun", [0x05] = "evt_overrun", |
| 358 | [0x06] = "evt_descriptor_read", [0x07] = "evt_data_read", |
| 359 | [0x08] = "evt_data_write", [0x09] = "evt_bus_reset", |
| 360 | [0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err", |
| 361 | [0x0c] = "-reserved-", [0x0d] = "-reserved-", |
| 362 | [0x0e] = "evt_unknown", [0x0f] = "evt_flushed", |
| 363 | [0x10] = "-reserved-", [0x11] = "ack_complete", |
| 364 | [0x12] = "ack_pending ", [0x13] = "-reserved-", |
| 365 | [0x14] = "ack_busy_X", [0x15] = "ack_busy_A", |
| 366 | [0x16] = "ack_busy_B", [0x17] = "-reserved-", |
| 367 | [0x18] = "-reserved-", [0x19] = "-reserved-", |
| 368 | [0x1a] = "-reserved-", [0x1b] = "ack_tardy", |
| 369 | [0x1c] = "-reserved-", [0x1d] = "ack_data_error", |
| 370 | [0x1e] = "ack_type_error", [0x1f] = "-reserved-", |
| 371 | [0x20] = "pending/cancelled", |
| 372 | }; |
| 373 | static const char *tcodes[] = { |
| 374 | [0x0] = "QW req", [0x1] = "BW req", |
| 375 | [0x2] = "W resp", [0x3] = "-reserved-", |
| 376 | [0x4] = "QR req", [0x5] = "BR req", |
| 377 | [0x6] = "QR resp", [0x7] = "BR resp", |
| 378 | [0x8] = "cycle start", [0x9] = "Lk req", |
| 379 | [0xa] = "async stream packet", [0xb] = "Lk resp", |
| 380 | [0xc] = "-reserved-", [0xd] = "-reserved-", |
| 381 | [0xe] = "link internal", [0xf] = "-reserved-", |
| 382 | }; |
| 383 | static const char *phys[] = { |
| 384 | [0x0] = "phy config packet", [0x1] = "link-on packet", |
| 385 | [0x2] = "self-id packet", [0x3] = "-reserved-", |
| 386 | }; |
| 387 | |
| 388 | static void log_ar_at_event(char dir, int speed, u32 *header, int evt) |
| 389 | { |
| 390 | int tcode = header[0] >> 4 & 0xf; |
| 391 | char specific[12]; |
| 392 | |
| 393 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR))) |
| 394 | return; |
| 395 | |
| 396 | if (unlikely(evt >= ARRAY_SIZE(evts))) |
| 397 | evt = 0x1f; |
| 398 | |
Stefan Richter | 08ddb2f | 2008-04-11 00:51:15 +0200 | [diff] [blame] | 399 | if (evt == OHCI1394_evt_bus_reset) { |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 400 | fw_notify("A%c evt_bus_reset, generation %d\n", |
| 401 | dir, (header[2] >> 16) & 0xff); |
Stefan Richter | 08ddb2f | 2008-04-11 00:51:15 +0200 | [diff] [blame] | 402 | return; |
| 403 | } |
| 404 | |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 405 | if (header[0] == ~header[1]) { |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 406 | fw_notify("A%c %s, %s, %08x\n", |
| 407 | dir, evts[evt], phys[header[0] >> 30 & 0x3], header[0]); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 408 | return; |
| 409 | } |
| 410 | |
| 411 | switch (tcode) { |
| 412 | case 0x0: case 0x6: case 0x8: |
| 413 | snprintf(specific, sizeof(specific), " = %08x", |
| 414 | be32_to_cpu((__force __be32)header[3])); |
| 415 | break; |
| 416 | case 0x1: case 0x5: case 0x7: case 0x9: case 0xb: |
| 417 | snprintf(specific, sizeof(specific), " %x,%x", |
| 418 | header[3] >> 16, header[3] & 0xffff); |
| 419 | break; |
| 420 | default: |
| 421 | specific[0] = '\0'; |
| 422 | } |
| 423 | |
| 424 | switch (tcode) { |
| 425 | case 0xe: case 0xa: |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 426 | fw_notify("A%c %s, %s\n", dir, evts[evt], tcodes[tcode]); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 427 | break; |
| 428 | case 0x0: case 0x1: case 0x4: case 0x5: case 0x9: |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 429 | fw_notify("A%c spd %x tl %02x, " |
| 430 | "%04x -> %04x, %s, " |
| 431 | "%s, %04x%08x%s\n", |
| 432 | dir, speed, header[0] >> 10 & 0x3f, |
| 433 | header[1] >> 16, header[0] >> 16, evts[evt], |
| 434 | tcodes[tcode], header[1] & 0xffff, header[2], specific); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 435 | break; |
| 436 | default: |
Stefan Richter | 161b96e | 2008-06-14 14:23:43 +0200 | [diff] [blame] | 437 | fw_notify("A%c spd %x tl %02x, " |
| 438 | "%04x -> %04x, %s, " |
| 439 | "%s%s\n", |
| 440 | dir, speed, header[0] >> 10 & 0x3f, |
| 441 | header[1] >> 16, header[0] >> 16, evts[evt], |
| 442 | tcodes[tcode], specific); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 443 | } |
| 444 | } |
| 445 | |
| 446 | #else |
| 447 | |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 448 | #define param_debug 0 |
| 449 | static inline void log_irqs(u32 evt) {} |
| 450 | static inline void log_selfids(int node_id, int generation, int self_id_count, u32 *s) {} |
| 451 | static inline void log_ar_at_event(char dir, int speed, u32 *header, int evt) {} |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 452 | |
| 453 | #endif /* CONFIG_FIREWIRE_OHCI_DEBUG */ |
| 454 | |
Adrian Bunk | 95688e9 | 2007-01-22 19:17:37 +0100 | [diff] [blame] | 455 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 456 | { |
| 457 | writel(data, ohci->registers + offset); |
| 458 | } |
| 459 | |
Adrian Bunk | 95688e9 | 2007-01-22 19:17:37 +0100 | [diff] [blame] | 460 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 461 | { |
| 462 | return readl(ohci->registers + offset); |
| 463 | } |
| 464 | |
Adrian Bunk | 95688e9 | 2007-01-22 19:17:37 +0100 | [diff] [blame] | 465 | static inline void flush_writes(const struct fw_ohci *ohci) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 466 | { |
| 467 | /* Do a dummy read to flush writes. */ |
| 468 | reg_read(ohci, OHCI1394_Version); |
| 469 | } |
| 470 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 471 | static int read_phy_reg(struct fw_ohci *ohci, int addr) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 472 | { |
Clemens Ladisch | 4a96b4f | 2010-04-04 15:19:52 +0200 | [diff] [blame] | 473 | u32 val; |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 474 | int i; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 475 | |
| 476 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 477 | for (i = 0; i < 10; i++) { |
| 478 | val = reg_read(ohci, OHCI1394_PhyControl); |
| 479 | if (val & OHCI1394_PhyControl_ReadDone) |
| 480 | return OHCI1394_PhyControl_ReadData(val); |
| 481 | |
| 482 | msleep(1); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 483 | } |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 484 | fw_error("failed to read phy reg\n"); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 485 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 486 | return -EBUSY; |
| 487 | } |
Clemens Ladisch | 4a96b4f | 2010-04-04 15:19:52 +0200 | [diff] [blame] | 488 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 489 | static int write_phy_reg(const struct fw_ohci *ohci, int addr, u32 val) |
| 490 | { |
| 491 | int i; |
| 492 | |
| 493 | reg_write(ohci, OHCI1394_PhyControl, |
| 494 | OHCI1394_PhyControl_Write(addr, val)); |
| 495 | for (i = 0; i < 100; i++) { |
| 496 | val = reg_read(ohci, OHCI1394_PhyControl); |
| 497 | if (!(val & OHCI1394_PhyControl_WritePending)) |
| 498 | return 0; |
| 499 | |
| 500 | msleep(1); |
| 501 | } |
| 502 | fw_error("failed to write phy reg\n"); |
| 503 | |
| 504 | return -EBUSY; |
Clemens Ladisch | 4a96b4f | 2010-04-04 15:19:52 +0200 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | static int ohci_update_phy_reg(struct fw_card *card, int addr, |
| 508 | int clear_bits, int set_bits) |
| 509 | { |
| 510 | struct fw_ohci *ohci = fw_ohci(card); |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 511 | int ret; |
Clemens Ladisch | 4a96b4f | 2010-04-04 15:19:52 +0200 | [diff] [blame] | 512 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 513 | ret = read_phy_reg(ohci, addr); |
| 514 | if (ret < 0) |
| 515 | return ret; |
Clemens Ladisch | 4a96b4f | 2010-04-04 15:19:52 +0200 | [diff] [blame] | 516 | |
Clemens Ladisch | e7014da | 2010-04-01 16:40:18 +0200 | [diff] [blame] | 517 | /* |
| 518 | * The interrupt status bits are cleared by writing a one bit. |
| 519 | * Avoid clearing them unless explicitly requested in set_bits. |
| 520 | */ |
| 521 | if (addr == 5) |
| 522 | clear_bits |= PHY_INT_STATUS_BITS; |
| 523 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 524 | return write_phy_reg(ohci, addr, (ret & ~clear_bits) | set_bits); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 525 | } |
| 526 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 527 | static int read_paged_phy_reg(struct fw_ohci *ohci, int page, int addr) |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 528 | { |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 529 | int ret; |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 530 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 531 | ret = ohci_update_phy_reg(&ohci->card, 7, PHY_PAGE_SELECT, page << 5); |
| 532 | if (ret < 0) |
| 533 | return ret; |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 534 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 535 | return read_phy_reg(ohci, addr); |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 536 | } |
| 537 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 538 | static int ar_context_add_page(struct ar_context *ctx) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 539 | { |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 540 | struct device *dev = ctx->ohci->card.device; |
| 541 | struct ar_buffer *ab; |
Stefan Richter | f5101d5 | 2008-03-14 00:27:49 +0100 | [diff] [blame] | 542 | dma_addr_t uninitialized_var(ab_bus); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 543 | size_t offset; |
| 544 | |
Jarod Wilson | bde1709 | 2008-03-12 17:43:26 -0400 | [diff] [blame] | 545 | ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 546 | if (ab == NULL) |
| 547 | return -ENOMEM; |
| 548 | |
Jay Fenlason | a55709b | 2008-10-22 15:59:42 -0400 | [diff] [blame] | 549 | ab->next = NULL; |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 550 | memset(&ab->descriptor, 0, sizeof(ab->descriptor)); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 551 | ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | |
| 552 | DESCRIPTOR_STATUS | |
| 553 | DESCRIPTOR_BRANCH_ALWAYS); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 554 | offset = offsetof(struct ar_buffer, data); |
| 555 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); |
| 556 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); |
| 557 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); |
| 558 | ab->descriptor.branch_address = 0; |
| 559 | |
Kristian Høgsberg | ec839e4 | 2007-05-22 18:55:48 -0400 | [diff] [blame] | 560 | ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 561 | ctx->last_buffer->next = ab; |
| 562 | ctx->last_buffer = ab; |
| 563 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 564 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 565 | flush_writes(ctx->ohci); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 566 | |
| 567 | return 0; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 568 | } |
| 569 | |
Jay Fenlason | a55709b | 2008-10-22 15:59:42 -0400 | [diff] [blame] | 570 | static void ar_context_release(struct ar_context *ctx) |
| 571 | { |
| 572 | struct ar_buffer *ab, *ab_next; |
| 573 | size_t offset; |
| 574 | dma_addr_t ab_bus; |
| 575 | |
| 576 | for (ab = ctx->current_buffer; ab; ab = ab_next) { |
| 577 | ab_next = ab->next; |
| 578 | offset = offsetof(struct ar_buffer, data); |
| 579 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
| 580 | dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE, |
| 581 | ab, ab_bus); |
| 582 | } |
| 583 | } |
| 584 | |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 585 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
| 586 | #define cond_le32_to_cpu(v) \ |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 587 | (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v)) |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 588 | #else |
| 589 | #define cond_le32_to_cpu(v) le32_to_cpu(v) |
| 590 | #endif |
| 591 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 592 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 593 | { |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 594 | struct fw_ohci *ohci = ctx->ohci; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 595 | struct fw_packet p; |
| 596 | u32 status, length, tcode; |
Stefan Richter | 4328656 | 2008-03-11 21:22:26 +0100 | [diff] [blame] | 597 | int evt; |
Kristian Høgsberg | 0edeefd | 2007-01-26 00:38:49 -0500 | [diff] [blame] | 598 | |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 599 | p.header[0] = cond_le32_to_cpu(buffer[0]); |
| 600 | p.header[1] = cond_le32_to_cpu(buffer[1]); |
| 601 | p.header[2] = cond_le32_to_cpu(buffer[2]); |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 602 | |
| 603 | tcode = (p.header[0] >> 4) & 0x0f; |
| 604 | switch (tcode) { |
| 605 | case TCODE_WRITE_QUADLET_REQUEST: |
| 606 | case TCODE_READ_QUADLET_RESPONSE: |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 607 | p.header[3] = (__force __u32) buffer[3]; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 608 | p.header_length = 16; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 609 | p.payload_length = 0; |
| 610 | break; |
| 611 | |
| 612 | case TCODE_READ_BLOCK_REQUEST : |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 613 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 614 | p.header_length = 16; |
| 615 | p.payload_length = 0; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 616 | break; |
| 617 | |
| 618 | case TCODE_WRITE_BLOCK_REQUEST: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 619 | case TCODE_READ_BLOCK_RESPONSE: |
| 620 | case TCODE_LOCK_REQUEST: |
| 621 | case TCODE_LOCK_RESPONSE: |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 622 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 623 | p.header_length = 16; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 624 | p.payload_length = p.header[3] >> 16; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 625 | break; |
| 626 | |
| 627 | case TCODE_WRITE_RESPONSE: |
| 628 | case TCODE_READ_QUADLET_REQUEST: |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 629 | case OHCI_TCODE_PHY_PACKET: |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 630 | p.header_length = 12; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 631 | p.payload_length = 0; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 632 | break; |
Stefan Richter | ccff962 | 2008-05-31 19:36:06 +0200 | [diff] [blame] | 633 | |
| 634 | default: |
| 635 | /* FIXME: Stop context, discard everything, and restart? */ |
| 636 | p.header_length = 0; |
| 637 | p.payload_length = 0; |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 638 | } |
| 639 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 640 | p.payload = (void *) buffer + p.header_length; |
| 641 | |
| 642 | /* FIXME: What to do about evt_* errors? */ |
| 643 | length = (p.header_length + p.payload_length + 3) / 4; |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 644 | status = cond_le32_to_cpu(buffer[length]); |
Stefan Richter | 4328656 | 2008-03-11 21:22:26 +0100 | [diff] [blame] | 645 | evt = (status >> 16) & 0x1f; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 646 | |
Stefan Richter | 4328656 | 2008-03-11 21:22:26 +0100 | [diff] [blame] | 647 | p.ack = evt - 16; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 648 | p.speed = (status >> 21) & 0x7; |
| 649 | p.timestamp = status & 0xffff; |
| 650 | p.generation = ohci->request_generation; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 651 | |
Stefan Richter | 4328656 | 2008-03-11 21:22:26 +0100 | [diff] [blame] | 652 | log_ar_at_event('R', p.speed, p.header, evt); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 653 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 654 | /* |
| 655 | * The OHCI bus reset handler synthesizes a phy packet with |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 656 | * the new generation number when a bus reset happens (see |
| 657 | * section 8.4.2.3). This helps us determine when a request |
| 658 | * was received and make sure we send the response in the same |
| 659 | * generation. We only need this for requests; for responses |
| 660 | * we use the unique tlabel for finding the matching |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 661 | * request. |
Stefan Richter | d34316a | 2008-04-12 22:31:25 +0200 | [diff] [blame] | 662 | * |
| 663 | * Alas some chips sometimes emit bus reset packets with a |
| 664 | * wrong generation. We set the correct generation for these |
| 665 | * at a slightly incorrect time (in bus_reset_tasklet). |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 666 | */ |
Stefan Richter | d34316a | 2008-04-12 22:31:25 +0200 | [diff] [blame] | 667 | if (evt == OHCI1394_evt_bus_reset) { |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 668 | if (!(ohci->quirks & QUIRK_RESET_PACKET)) |
Stefan Richter | d34316a | 2008-04-12 22:31:25 +0200 | [diff] [blame] | 669 | ohci->request_generation = (p.header[2] >> 16) & 0xff; |
| 670 | } else if (ctx == &ohci->ar_request_ctx) { |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 671 | fw_core_handle_request(&ohci->card, &p); |
Stefan Richter | d34316a | 2008-04-12 22:31:25 +0200 | [diff] [blame] | 672 | } else { |
Kristian Høgsberg | 2639a6f | 2007-01-26 00:37:57 -0500 | [diff] [blame] | 673 | fw_core_handle_response(&ohci->card, &p); |
Stefan Richter | d34316a | 2008-04-12 22:31:25 +0200 | [diff] [blame] | 674 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 675 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 676 | return buffer + length + 1; |
| 677 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 678 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 679 | static void ar_context_tasklet(unsigned long data) |
| 680 | { |
| 681 | struct ar_context *ctx = (struct ar_context *)data; |
| 682 | struct fw_ohci *ohci = ctx->ohci; |
| 683 | struct ar_buffer *ab; |
| 684 | struct descriptor *d; |
| 685 | void *buffer, *end; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 686 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 687 | ab = ctx->current_buffer; |
| 688 | d = &ab->descriptor; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 689 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 690 | if (d->res_count == 0) { |
| 691 | size_t size, rest, offset; |
Jarod Wilson | 6b84236 | 2008-03-25 16:47:16 -0400 | [diff] [blame] | 692 | dma_addr_t start_bus; |
| 693 | void *start; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 694 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 695 | /* |
| 696 | * This descriptor is finished and we may have a |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 697 | * packet split across this and the next buffer. We |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 698 | * reuse the page for reassembling the split packet. |
| 699 | */ |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 700 | |
| 701 | offset = offsetof(struct ar_buffer, data); |
Jarod Wilson | 6b84236 | 2008-03-25 16:47:16 -0400 | [diff] [blame] | 702 | start = buffer = ab; |
| 703 | start_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 704 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 705 | ab = ab->next; |
| 706 | d = &ab->descriptor; |
| 707 | size = buffer + PAGE_SIZE - ctx->pointer; |
| 708 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); |
| 709 | memmove(buffer, ctx->pointer, size); |
| 710 | memcpy(buffer + size, ab->data, rest); |
| 711 | ctx->current_buffer = ab; |
| 712 | ctx->pointer = (void *) ab->data + rest; |
| 713 | end = buffer + size + rest; |
| 714 | |
| 715 | while (buffer < end) |
| 716 | buffer = handle_ar_packet(ctx, buffer); |
| 717 | |
Jarod Wilson | bde1709 | 2008-03-12 17:43:26 -0400 | [diff] [blame] | 718 | dma_free_coherent(ohci->card.device, PAGE_SIZE, |
Jarod Wilson | 6b84236 | 2008-03-25 16:47:16 -0400 | [diff] [blame] | 719 | start, start_bus); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 720 | ar_context_add_page(ctx); |
| 721 | } else { |
| 722 | buffer = ctx->pointer; |
| 723 | ctx->pointer = end = |
| 724 | (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); |
| 725 | |
| 726 | while (buffer < end) |
| 727 | buffer = handle_ar_packet(ctx, buffer); |
| 728 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 729 | } |
| 730 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 731 | static int ar_context_init(struct ar_context *ctx, |
| 732 | struct fw_ohci *ohci, u32 regs) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 733 | { |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 734 | struct ar_buffer ab; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 735 | |
Kristian Høgsberg | 72e318e | 2007-02-06 14:49:31 -0500 | [diff] [blame] | 736 | ctx->regs = regs; |
| 737 | ctx->ohci = ohci; |
| 738 | ctx->last_buffer = &ab; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 739 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
| 740 | |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 741 | ar_context_add_page(ctx); |
| 742 | ar_context_add_page(ctx); |
| 743 | ctx->current_buffer = ab.next; |
| 744 | ctx->pointer = ctx->current_buffer->data; |
| 745 | |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | static void ar_context_run(struct ar_context *ctx) |
| 750 | { |
| 751 | struct ar_buffer *ab = ctx->current_buffer; |
| 752 | dma_addr_t ab_bus; |
| 753 | size_t offset; |
| 754 | |
| 755 | offset = offsetof(struct ar_buffer, data); |
Stefan Richter | 0a9972b | 2007-06-23 20:28:17 +0200 | [diff] [blame] | 756 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 757 | |
| 758 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 759 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
Kristian Høgsberg | 32b4609 | 2007-02-06 14:49:30 -0500 | [diff] [blame] | 760 | flush_writes(ctx->ohci); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 761 | } |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 762 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 763 | static struct descriptor *find_branch_descriptor(struct descriptor *d, int z) |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 764 | { |
| 765 | int b, key; |
| 766 | |
| 767 | b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2; |
| 768 | key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8; |
| 769 | |
| 770 | /* figure out which descriptor the branch address goes in */ |
| 771 | if (z == 2 && (b == 3 || key == 2)) |
| 772 | return d; |
| 773 | else |
| 774 | return d + z - 1; |
| 775 | } |
| 776 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 777 | static void context_tasklet(unsigned long data) |
| 778 | { |
| 779 | struct context *ctx = (struct context *) data; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 780 | struct descriptor *d, *last; |
| 781 | u32 address; |
| 782 | int z; |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 783 | struct descriptor_buffer *desc; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 784 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 785 | desc = list_entry(ctx->buffer_list.next, |
| 786 | struct descriptor_buffer, list); |
| 787 | last = ctx->last; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 788 | while (last->branch_address != 0) { |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 789 | struct descriptor_buffer *old_desc = desc; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 790 | address = le32_to_cpu(last->branch_address); |
| 791 | z = address & 0xf; |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 792 | address &= ~0xf; |
| 793 | |
| 794 | /* If the branch address points to a buffer outside of the |
| 795 | * current buffer, advance to the next buffer. */ |
| 796 | if (address < desc->buffer_bus || |
| 797 | address >= desc->buffer_bus + desc->used) |
| 798 | desc = list_entry(desc->list.next, |
| 799 | struct descriptor_buffer, list); |
| 800 | d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d); |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 801 | last = find_branch_descriptor(d, z); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 802 | |
| 803 | if (!ctx->callback(ctx, d, last)) |
| 804 | break; |
| 805 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 806 | if (old_desc != desc) { |
| 807 | /* If we've advanced to the next buffer, move the |
| 808 | * previous buffer to the free list. */ |
| 809 | unsigned long flags; |
| 810 | old_desc->used = 0; |
| 811 | spin_lock_irqsave(&ctx->ohci->lock, flags); |
| 812 | list_move_tail(&old_desc->list, &ctx->buffer_list); |
| 813 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
| 814 | } |
| 815 | ctx->last = last; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 816 | } |
| 817 | } |
| 818 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 819 | /* |
| 820 | * Allocate a new buffer and add it to the list of free buffers for this |
| 821 | * context. Must be called with ohci->lock held. |
| 822 | */ |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 823 | static int context_add_buffer(struct context *ctx) |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 824 | { |
| 825 | struct descriptor_buffer *desc; |
Stefan Richter | f5101d5 | 2008-03-14 00:27:49 +0100 | [diff] [blame] | 826 | dma_addr_t uninitialized_var(bus_addr); |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 827 | int offset; |
| 828 | |
| 829 | /* |
| 830 | * 16MB of descriptors should be far more than enough for any DMA |
| 831 | * program. This will catch run-away userspace or DoS attacks. |
| 832 | */ |
| 833 | if (ctx->total_allocation >= 16*1024*1024) |
| 834 | return -ENOMEM; |
| 835 | |
| 836 | desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE, |
| 837 | &bus_addr, GFP_ATOMIC); |
| 838 | if (!desc) |
| 839 | return -ENOMEM; |
| 840 | |
| 841 | offset = (void *)&desc->buffer - (void *)desc; |
| 842 | desc->buffer_size = PAGE_SIZE - offset; |
| 843 | desc->buffer_bus = bus_addr + offset; |
| 844 | desc->used = 0; |
| 845 | |
| 846 | list_add_tail(&desc->list, &ctx->buffer_list); |
| 847 | ctx->total_allocation += PAGE_SIZE; |
| 848 | |
| 849 | return 0; |
| 850 | } |
| 851 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 852 | static int context_init(struct context *ctx, struct fw_ohci *ohci, |
| 853 | u32 regs, descriptor_callback_t callback) |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 854 | { |
| 855 | ctx->ohci = ohci; |
| 856 | ctx->regs = regs; |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 857 | ctx->total_allocation = 0; |
| 858 | |
| 859 | INIT_LIST_HEAD(&ctx->buffer_list); |
| 860 | if (context_add_buffer(ctx) < 0) |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 861 | return -ENOMEM; |
| 862 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 863 | ctx->buffer_tail = list_entry(ctx->buffer_list.next, |
| 864 | struct descriptor_buffer, list); |
| 865 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 866 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); |
| 867 | ctx->callback = callback; |
| 868 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 869 | /* |
| 870 | * We put a dummy descriptor in the buffer that has a NULL |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 871 | * branch address and looks like it's been sent. That way we |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 872 | * have a descriptor to append DMA programs to. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 873 | */ |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 874 | memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer)); |
| 875 | ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); |
| 876 | ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011); |
| 877 | ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer); |
| 878 | ctx->last = ctx->buffer_tail->buffer; |
| 879 | ctx->prev = ctx->buffer_tail->buffer; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 880 | |
| 881 | return 0; |
| 882 | } |
| 883 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 884 | static void context_release(struct context *ctx) |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 885 | { |
| 886 | struct fw_card *card = &ctx->ohci->card; |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 887 | struct descriptor_buffer *desc, *tmp; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 888 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 889 | list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list) |
| 890 | dma_free_coherent(card->device, PAGE_SIZE, desc, |
| 891 | desc->buffer_bus - |
| 892 | ((void *)&desc->buffer - (void *)desc)); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 893 | } |
| 894 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 895 | /* Must be called with ohci->lock held */ |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 896 | static struct descriptor *context_get_descriptors(struct context *ctx, |
| 897 | int z, dma_addr_t *d_bus) |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 898 | { |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 899 | struct descriptor *d = NULL; |
| 900 | struct descriptor_buffer *desc = ctx->buffer_tail; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 901 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 902 | if (z * sizeof(*d) > desc->buffer_size) |
| 903 | return NULL; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 904 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 905 | if (z * sizeof(*d) > desc->buffer_size - desc->used) { |
| 906 | /* No room for the descriptor in this buffer, so advance to the |
| 907 | * next one. */ |
| 908 | |
| 909 | if (desc->list.next == &ctx->buffer_list) { |
| 910 | /* If there is no free buffer next in the list, |
| 911 | * allocate one. */ |
| 912 | if (context_add_buffer(ctx) < 0) |
| 913 | return NULL; |
| 914 | } |
| 915 | desc = list_entry(desc->list.next, |
| 916 | struct descriptor_buffer, list); |
| 917 | ctx->buffer_tail = desc; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 918 | } |
| 919 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 920 | d = desc->buffer + desc->used / sizeof(*d); |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 921 | memset(d, 0, z * sizeof(*d)); |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 922 | *d_bus = desc->buffer_bus + desc->used; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 923 | |
| 924 | return d; |
| 925 | } |
| 926 | |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 927 | static void context_run(struct context *ctx, u32 extra) |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 928 | { |
| 929 | struct fw_ohci *ohci = ctx->ohci; |
| 930 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 931 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 932 | le32_to_cpu(ctx->last->branch_address)); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 933 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
| 934 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 935 | flush_writes(ohci); |
| 936 | } |
| 937 | |
| 938 | static void context_append(struct context *ctx, |
| 939 | struct descriptor *d, int z, int extra) |
| 940 | { |
| 941 | dma_addr_t d_bus; |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 942 | struct descriptor_buffer *desc = ctx->buffer_tail; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 943 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 944 | d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 945 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 946 | desc->used += (z + extra) * sizeof(*d); |
| 947 | ctx->prev->branch_address = cpu_to_le32(d_bus | z); |
| 948 | ctx->prev = find_branch_descriptor(d, z); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 949 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 950 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 951 | flush_writes(ctx->ohci); |
| 952 | } |
| 953 | |
| 954 | static void context_stop(struct context *ctx) |
| 955 | { |
| 956 | u32 reg; |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 957 | int i; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 958 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 959 | reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 960 | flush_writes(ctx->ohci); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 961 | |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 962 | for (i = 0; i < 10; i++) { |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 963 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 964 | if ((reg & CONTEXT_ACTIVE) == 0) |
Stefan Richter | b006854 | 2009-01-05 20:43:23 +0100 | [diff] [blame] | 965 | return; |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 966 | |
Stefan Richter | b980f5a | 2007-07-12 22:25:14 +0200 | [diff] [blame] | 967 | mdelay(1); |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 968 | } |
Stefan Richter | b006854 | 2009-01-05 20:43:23 +0100 | [diff] [blame] | 969 | fw_error("Error: DMA context still active (0x%08x)\n", reg); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 970 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 971 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 972 | struct driver_data { |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 973 | struct fw_packet *packet; |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 974 | }; |
| 975 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 976 | /* |
| 977 | * This function apppends a packet to the DMA queue for transmission. |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 978 | * Must always be called with the ochi->lock held to ensure proper |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 979 | * generation handling and locking around packet queue manipulation. |
| 980 | */ |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 981 | static int at_context_queue_packet(struct context *ctx, |
| 982 | struct fw_packet *packet) |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 983 | { |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 984 | struct fw_ohci *ohci = ctx->ohci; |
Stefan Richter | 4b6d51e | 2007-10-21 11:20:07 +0200 | [diff] [blame] | 985 | dma_addr_t d_bus, uninitialized_var(payload_bus); |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 986 | struct driver_data *driver_data; |
| 987 | struct descriptor *d, *last; |
| 988 | __le32 *header; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 989 | int z, tcode; |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 990 | u32 reg; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 991 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 992 | d = context_get_descriptors(ctx, 4, &d_bus); |
| 993 | if (d == NULL) { |
| 994 | packet->ack = RCODE_SEND_ERROR; |
| 995 | return -1; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 996 | } |
| 997 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 998 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 999 | d[0].res_count = cpu_to_le16(packet->timestamp); |
| 1000 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1001 | /* |
| 1002 | * The DMA format for asyncronous link packets is different |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1003 | * from the IEEE1394 layout, so shift the fields around |
| 1004 | * accordingly. If header_length is 8, it's a PHY packet, to |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1005 | * which we need to prepend an extra quadlet. |
| 1006 | */ |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1007 | |
| 1008 | header = (__le32 *) &d[1]; |
Jay Fenlason | f8c2287 | 2009-03-05 19:08:40 +0100 | [diff] [blame] | 1009 | switch (packet->header_length) { |
| 1010 | case 16: |
| 1011 | case 12: |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1012 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
| 1013 | (packet->speed << 16)); |
| 1014 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | |
| 1015 | (packet->header[0] & 0xffff0000)); |
| 1016 | header[2] = cpu_to_le32(packet->header[2]); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1017 | |
| 1018 | tcode = (packet->header[0] >> 4) & 0x0f; |
| 1019 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1020 | header[3] = cpu_to_le32(packet->header[3]); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1021 | else |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1022 | header[3] = (__force __le32) packet->header[3]; |
| 1023 | |
| 1024 | d[0].req_count = cpu_to_le16(packet->header_length); |
Jay Fenlason | f8c2287 | 2009-03-05 19:08:40 +0100 | [diff] [blame] | 1025 | break; |
| 1026 | |
| 1027 | case 8: |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1028 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
| 1029 | (packet->speed << 16)); |
| 1030 | header[1] = cpu_to_le32(packet->header[0]); |
| 1031 | header[2] = cpu_to_le32(packet->header[1]); |
| 1032 | d[0].req_count = cpu_to_le16(12); |
Jay Fenlason | f8c2287 | 2009-03-05 19:08:40 +0100 | [diff] [blame] | 1033 | break; |
| 1034 | |
| 1035 | case 4: |
| 1036 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
| 1037 | (packet->speed << 16)); |
| 1038 | header[1] = cpu_to_le32(packet->header[0] & 0xffff0000); |
| 1039 | d[0].req_count = cpu_to_le16(8); |
| 1040 | break; |
| 1041 | |
| 1042 | default: |
| 1043 | /* BUG(); */ |
| 1044 | packet->ack = RCODE_SEND_ERROR; |
| 1045 | return -1; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1046 | } |
| 1047 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1048 | driver_data = (struct driver_data *) &d[3]; |
| 1049 | driver_data->packet = packet; |
Kristian Høgsberg | 20d1167 | 2007-03-26 19:18:19 -0400 | [diff] [blame] | 1050 | packet->driver_data = driver_data; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 1051 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1052 | if (packet->payload_length > 0) { |
| 1053 | payload_bus = |
| 1054 | dma_map_single(ohci->card.device, packet->payload, |
| 1055 | packet->payload_length, DMA_TO_DEVICE); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 1056 | if (dma_mapping_error(ohci->card.device, payload_bus)) { |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1057 | packet->ack = RCODE_SEND_ERROR; |
| 1058 | return -1; |
| 1059 | } |
Stefan Richter | 19593ff | 2009-10-14 20:40:10 +0200 | [diff] [blame] | 1060 | packet->payload_bus = payload_bus; |
| 1061 | packet->payload_mapped = true; |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1062 | |
| 1063 | d[2].req_count = cpu_to_le16(packet->payload_length); |
| 1064 | d[2].data_address = cpu_to_le32(payload_bus); |
| 1065 | last = &d[2]; |
| 1066 | z = 3; |
| 1067 | } else { |
| 1068 | last = &d[0]; |
| 1069 | z = 2; |
| 1070 | } |
| 1071 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1072 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
| 1073 | DESCRIPTOR_IRQ_ALWAYS | |
| 1074 | DESCRIPTOR_BRANCH_ALWAYS); |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1075 | |
Jarod Wilson | 76f73ca | 2008-04-07 22:32:33 +0200 | [diff] [blame] | 1076 | /* |
| 1077 | * If the controller and packet generations don't match, we need to |
| 1078 | * bail out and try again. If IntEvent.busReset is set, the AT context |
| 1079 | * is halted, so appending to the context and trying to run it is |
| 1080 | * futile. Most controllers do the right thing and just flush the AT |
| 1081 | * queue (per section 7.2.3.2 of the OHCI 1.1 specification), but |
| 1082 | * some controllers (like a JMicron JMB381 PCI-e) misbehave and wind |
| 1083 | * up stalling out. So we just bail out in software and try again |
| 1084 | * later, and everyone is happy. |
| 1085 | * FIXME: Document how the locking works. |
| 1086 | */ |
| 1087 | if (ohci->generation != packet->generation || |
| 1088 | reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) { |
Stefan Richter | 19593ff | 2009-10-14 20:40:10 +0200 | [diff] [blame] | 1089 | if (packet->payload_mapped) |
Stefan Richter | ab88ca4 | 2007-08-29 19:40:28 +0200 | [diff] [blame] | 1090 | dma_unmap_single(ohci->card.device, payload_bus, |
| 1091 | packet->payload_length, DMA_TO_DEVICE); |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1092 | packet->ack = RCODE_GENERATION; |
| 1093 | return -1; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1094 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1095 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1096 | context_append(ctx, d, z, 4 - z); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1097 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1098 | /* If the context isn't already running, start it up. */ |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1099 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
Kristian Høgsberg | 053b308 | 2007-04-10 18:11:17 -0400 | [diff] [blame] | 1100 | if ((reg & CONTEXT_RUN) == 0) |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1101 | context_run(ctx, 0); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1102 | |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1106 | static int handle_at_packet(struct context *context, |
| 1107 | struct descriptor *d, |
| 1108 | struct descriptor *last) |
| 1109 | { |
| 1110 | struct driver_data *driver_data; |
| 1111 | struct fw_packet *packet; |
| 1112 | struct fw_ohci *ohci = context->ohci; |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1113 | int evt; |
| 1114 | |
| 1115 | if (last->transfer_status == 0) |
| 1116 | /* This descriptor isn't done yet, stop iteration. */ |
| 1117 | return 0; |
| 1118 | |
| 1119 | driver_data = (struct driver_data *) &d[3]; |
| 1120 | packet = driver_data->packet; |
| 1121 | if (packet == NULL) |
| 1122 | /* This packet was cancelled, just continue. */ |
| 1123 | return 1; |
| 1124 | |
Stefan Richter | 19593ff | 2009-10-14 20:40:10 +0200 | [diff] [blame] | 1125 | if (packet->payload_mapped) |
Stefan Richter | 1d1dc5e | 2008-12-10 00:20:38 +0100 | [diff] [blame] | 1126 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1127 | packet->payload_length, DMA_TO_DEVICE); |
| 1128 | |
| 1129 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
| 1130 | packet->timestamp = le16_to_cpu(last->res_count); |
| 1131 | |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 1132 | log_ar_at_event('T', packet->speed, packet->header, evt); |
| 1133 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1134 | switch (evt) { |
| 1135 | case OHCI1394_evt_timeout: |
| 1136 | /* Async response transmit timed out. */ |
| 1137 | packet->ack = RCODE_CANCELLED; |
| 1138 | break; |
| 1139 | |
| 1140 | case OHCI1394_evt_flushed: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1141 | /* |
| 1142 | * The packet was flushed should give same error as |
| 1143 | * when we try to use a stale generation count. |
| 1144 | */ |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1145 | packet->ack = RCODE_GENERATION; |
| 1146 | break; |
| 1147 | |
| 1148 | case OHCI1394_evt_missing_ack: |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1149 | /* |
| 1150 | * Using a valid (current) generation count, but the |
| 1151 | * node is not on the bus or not sending acks. |
| 1152 | */ |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1153 | packet->ack = RCODE_NO_ACK; |
| 1154 | break; |
| 1155 | |
| 1156 | case ACK_COMPLETE + 0x10: |
| 1157 | case ACK_PENDING + 0x10: |
| 1158 | case ACK_BUSY_X + 0x10: |
| 1159 | case ACK_BUSY_A + 0x10: |
| 1160 | case ACK_BUSY_B + 0x10: |
| 1161 | case ACK_DATA_ERROR + 0x10: |
| 1162 | case ACK_TYPE_ERROR + 0x10: |
| 1163 | packet->ack = evt - 0x10; |
| 1164 | break; |
| 1165 | |
| 1166 | default: |
| 1167 | packet->ack = RCODE_SEND_ERROR; |
| 1168 | break; |
| 1169 | } |
| 1170 | |
| 1171 | packet->callback(packet, &ohci->card, packet->ack); |
| 1172 | |
| 1173 | return 1; |
| 1174 | } |
| 1175 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1176 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
| 1177 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) |
| 1178 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) |
| 1179 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) |
| 1180 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1181 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1182 | static void handle_local_rom(struct fw_ohci *ohci, |
| 1183 | struct fw_packet *packet, u32 csr) |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1184 | { |
| 1185 | struct fw_packet response; |
| 1186 | int tcode, length, i; |
| 1187 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1188 | tcode = HEADER_GET_TCODE(packet->header[0]); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1189 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1190 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1191 | else |
| 1192 | length = 4; |
| 1193 | |
| 1194 | i = csr - CSR_CONFIG_ROM; |
| 1195 | if (i + length > CONFIG_ROM_SIZE) { |
| 1196 | fw_fill_response(&response, packet->header, |
| 1197 | RCODE_ADDRESS_ERROR, NULL, 0); |
| 1198 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { |
| 1199 | fw_fill_response(&response, packet->header, |
| 1200 | RCODE_TYPE_ERROR, NULL, 0); |
| 1201 | } else { |
| 1202 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, |
| 1203 | (void *) ohci->config_rom + i, length); |
| 1204 | } |
| 1205 | |
| 1206 | fw_core_handle_response(&ohci->card, &response); |
| 1207 | } |
| 1208 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1209 | static void handle_local_lock(struct fw_ohci *ohci, |
| 1210 | struct fw_packet *packet, u32 csr) |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1211 | { |
| 1212 | struct fw_packet response; |
| 1213 | int tcode, length, ext_tcode, sel; |
| 1214 | __be32 *payload, lock_old; |
| 1215 | u32 lock_arg, lock_data; |
| 1216 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1217 | tcode = HEADER_GET_TCODE(packet->header[0]); |
| 1218 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1219 | payload = packet->payload; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1220 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1221 | |
| 1222 | if (tcode == TCODE_LOCK_REQUEST && |
| 1223 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { |
| 1224 | lock_arg = be32_to_cpu(payload[0]); |
| 1225 | lock_data = be32_to_cpu(payload[1]); |
| 1226 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { |
| 1227 | lock_arg = 0; |
| 1228 | lock_data = 0; |
| 1229 | } else { |
| 1230 | fw_fill_response(&response, packet->header, |
| 1231 | RCODE_TYPE_ERROR, NULL, 0); |
| 1232 | goto out; |
| 1233 | } |
| 1234 | |
| 1235 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; |
| 1236 | reg_write(ohci, OHCI1394_CSRData, lock_data); |
| 1237 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); |
| 1238 | reg_write(ohci, OHCI1394_CSRControl, sel); |
| 1239 | |
| 1240 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) |
| 1241 | lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData)); |
| 1242 | else |
| 1243 | fw_notify("swap not done yet\n"); |
| 1244 | |
| 1245 | fw_fill_response(&response, packet->header, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1246 | RCODE_COMPLETE, &lock_old, sizeof(lock_old)); |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1247 | out: |
| 1248 | fw_core_handle_response(&ohci->card, &response); |
| 1249 | } |
| 1250 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1251 | static void handle_local_request(struct context *ctx, struct fw_packet *packet) |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1252 | { |
| 1253 | u64 offset; |
| 1254 | u32 csr; |
| 1255 | |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 1256 | if (ctx == &ctx->ohci->at_request_ctx) { |
| 1257 | packet->ack = ACK_PENDING; |
| 1258 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
| 1259 | } |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1260 | |
| 1261 | offset = |
| 1262 | ((unsigned long long) |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1263 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1264 | packet->header[2]; |
| 1265 | csr = offset - CSR_REGISTER_BASE; |
| 1266 | |
| 1267 | /* Handle config rom reads. */ |
| 1268 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) |
| 1269 | handle_local_rom(ctx->ohci, packet, csr); |
| 1270 | else switch (csr) { |
| 1271 | case CSR_BUS_MANAGER_ID: |
| 1272 | case CSR_BANDWIDTH_AVAILABLE: |
| 1273 | case CSR_CHANNELS_AVAILABLE_HI: |
| 1274 | case CSR_CHANNELS_AVAILABLE_LO: |
| 1275 | handle_local_lock(ctx->ohci, packet, csr); |
| 1276 | break; |
| 1277 | default: |
| 1278 | if (ctx == &ctx->ohci->at_request_ctx) |
| 1279 | fw_core_handle_request(&ctx->ohci->card, packet); |
| 1280 | else |
| 1281 | fw_core_handle_response(&ctx->ohci->card, packet); |
| 1282 | break; |
| 1283 | } |
Kristian Høgsberg | 473d28c | 2007-03-07 12:12:55 -0500 | [diff] [blame] | 1284 | |
| 1285 | if (ctx == &ctx->ohci->at_response_ctx) { |
| 1286 | packet->ack = ACK_COMPLETE; |
| 1287 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
| 1288 | } |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1289 | } |
Kristian Høgsberg | e636fe2 | 2007-01-26 00:38:04 -0500 | [diff] [blame] | 1290 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1291 | static void at_context_transmit(struct context *ctx, struct fw_packet *packet) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1292 | { |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1293 | unsigned long flags; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1294 | int ret; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1295 | |
| 1296 | spin_lock_irqsave(&ctx->ohci->lock, flags); |
| 1297 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1298 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
Kristian Høgsberg | e636fe2 | 2007-01-26 00:38:04 -0500 | [diff] [blame] | 1299 | ctx->ohci->generation == packet->generation) { |
Kristian Høgsberg | 93c4cce | 2007-01-26 00:38:26 -0500 | [diff] [blame] | 1300 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
| 1301 | handle_local_request(ctx, packet); |
| 1302 | return; |
Kristian Høgsberg | e636fe2 | 2007-01-26 00:38:04 -0500 | [diff] [blame] | 1303 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1304 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1305 | ret = at_context_queue_packet(ctx, packet); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1306 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
| 1307 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1308 | if (ret < 0) |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1309 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 1310 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | static void bus_reset_tasklet(unsigned long data) |
| 1314 | { |
| 1315 | struct fw_ohci *ohci = (struct fw_ohci *)data; |
Kristian Høgsberg | e636fe2 | 2007-01-26 00:38:04 -0500 | [diff] [blame] | 1316 | int self_id_count, i, j, reg; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1317 | int generation, new_generation; |
| 1318 | unsigned long flags; |
Stefan Richter | 4eaff7d | 2007-07-25 19:18:08 +0200 | [diff] [blame] | 1319 | void *free_rom = NULL; |
| 1320 | dma_addr_t free_rom_bus = 0; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1321 | |
| 1322 | reg = reg_read(ohci, OHCI1394_NodeID); |
| 1323 | if (!(reg & OHCI1394_NodeID_idValid)) { |
Stefan Richter | 02ff8f8 | 2007-08-30 00:11:40 +0200 | [diff] [blame] | 1324 | fw_notify("node ID not valid, new bus reset in progress\n"); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1325 | return; |
| 1326 | } |
Stefan Richter | 02ff8f8 | 2007-08-30 00:11:40 +0200 | [diff] [blame] | 1327 | if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { |
| 1328 | fw_notify("malconfigured bus\n"); |
| 1329 | return; |
| 1330 | } |
| 1331 | ohci->node_id = reg & (OHCI1394_NodeID_busNumber | |
| 1332 | OHCI1394_NodeID_nodeNumber); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1333 | |
Stefan Richter | c8a9a49 | 2008-03-19 21:40:32 +0100 | [diff] [blame] | 1334 | reg = reg_read(ohci, OHCI1394_SelfIDCount); |
| 1335 | if (reg & OHCI1394_SelfIDCount_selfIDError) { |
| 1336 | fw_notify("inconsistent self IDs\n"); |
| 1337 | return; |
| 1338 | } |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1339 | /* |
| 1340 | * The count in the SelfIDCount register is the number of |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1341 | * bytes in the self ID receive buffer. Since we also receive |
| 1342 | * the inverted quadlets and a header quadlet, we shift one |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1343 | * bit extra to get the actual number of self IDs. |
| 1344 | */ |
Stefan Richter | 928ec5f | 2009-09-06 18:49:17 +0200 | [diff] [blame] | 1345 | self_id_count = (reg >> 3) & 0xff; |
| 1346 | if (self_id_count == 0 || self_id_count > 252) { |
Stefan Richter | 016bf3d | 2008-03-19 22:05:02 +0100 | [diff] [blame] | 1347 | fw_notify("inconsistent self IDs\n"); |
| 1348 | return; |
| 1349 | } |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 1350 | generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; |
Stefan Richter | ee71c2f | 2007-08-25 14:08:19 +0200 | [diff] [blame] | 1351 | rmb(); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1352 | |
| 1353 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { |
Stefan Richter | c8a9a49 | 2008-03-19 21:40:32 +0100 | [diff] [blame] | 1354 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) { |
| 1355 | fw_notify("inconsistent self IDs\n"); |
| 1356 | return; |
| 1357 | } |
Stefan Richter | 11bf20a | 2008-03-01 02:47:15 +0100 | [diff] [blame] | 1358 | ohci->self_id_buffer[j] = |
| 1359 | cond_le32_to_cpu(ohci->self_id_cpu[i]); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1360 | } |
Stefan Richter | ee71c2f | 2007-08-25 14:08:19 +0200 | [diff] [blame] | 1361 | rmb(); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1362 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1363 | /* |
| 1364 | * Check the consistency of the self IDs we just read. The |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1365 | * problem we face is that a new bus reset can start while we |
| 1366 | * read out the self IDs from the DMA buffer. If this happens, |
| 1367 | * the DMA buffer will be overwritten with new self IDs and we |
| 1368 | * will read out inconsistent data. The OHCI specification |
| 1369 | * (section 11.2) recommends a technique similar to |
| 1370 | * linux/seqlock.h, where we remember the generation of the |
| 1371 | * self IDs in the buffer before reading them out and compare |
| 1372 | * it to the current generation after reading them out. If |
| 1373 | * the two generations match we know we have a consistent set |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1374 | * of self IDs. |
| 1375 | */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1376 | |
| 1377 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; |
| 1378 | if (new_generation != generation) { |
| 1379 | fw_notify("recursive bus reset detected, " |
| 1380 | "discarding self ids\n"); |
| 1381 | return; |
| 1382 | } |
| 1383 | |
| 1384 | /* FIXME: Document how the locking works. */ |
| 1385 | spin_lock_irqsave(&ohci->lock, flags); |
| 1386 | |
| 1387 | ohci->generation = generation; |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1388 | context_stop(&ohci->at_request_ctx); |
| 1389 | context_stop(&ohci->at_response_ctx); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1390 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
| 1391 | |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 1392 | if (ohci->quirks & QUIRK_RESET_PACKET) |
Stefan Richter | d34316a | 2008-04-12 22:31:25 +0200 | [diff] [blame] | 1393 | ohci->request_generation = generation; |
| 1394 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1395 | /* |
| 1396 | * This next bit is unrelated to the AT context stuff but we |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1397 | * have to do it under the spinlock also. If a new config rom |
| 1398 | * was set up before this reset, the old one is now no longer |
| 1399 | * in use and we can free it. Update the config rom pointers |
| 1400 | * to point to the current config rom and clear the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1401 | * next_config_rom pointer so a new udpate can take place. |
| 1402 | */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1403 | |
| 1404 | if (ohci->next_config_rom != NULL) { |
Kristian Høgsberg | 0bd243c | 2007-06-05 19:27:05 -0400 | [diff] [blame] | 1405 | if (ohci->next_config_rom != ohci->config_rom) { |
| 1406 | free_rom = ohci->config_rom; |
| 1407 | free_rom_bus = ohci->config_rom_bus; |
| 1408 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1409 | ohci->config_rom = ohci->next_config_rom; |
| 1410 | ohci->config_rom_bus = ohci->next_config_rom_bus; |
| 1411 | ohci->next_config_rom = NULL; |
| 1412 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1413 | /* |
| 1414 | * Restore config_rom image and manually update |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1415 | * config_rom registers. Writing the header quadlet |
| 1416 | * will indicate that the config rom is ready, so we |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1417 | * do that last. |
| 1418 | */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1419 | reg_write(ohci, OHCI1394_BusOptions, |
| 1420 | be32_to_cpu(ohci->config_rom[2])); |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 1421 | ohci->config_rom[0] = ohci->next_header; |
| 1422 | reg_write(ohci, OHCI1394_ConfigROMhdr, |
| 1423 | be32_to_cpu(ohci->next_header)); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1424 | } |
| 1425 | |
Stefan Richter | 080de8c | 2008-02-28 20:54:43 +0100 | [diff] [blame] | 1426 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
| 1427 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); |
| 1428 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); |
| 1429 | #endif |
| 1430 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1431 | spin_unlock_irqrestore(&ohci->lock, flags); |
| 1432 | |
Stefan Richter | 4eaff7d | 2007-07-25 19:18:08 +0200 | [diff] [blame] | 1433 | if (free_rom) |
| 1434 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
| 1435 | free_rom, free_rom_bus); |
| 1436 | |
Stefan Richter | 08ddb2f | 2008-04-11 00:51:15 +0200 | [diff] [blame] | 1437 | log_selfids(ohci->node_id, generation, |
| 1438 | self_id_count, ohci->self_id_buffer); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 1439 | |
Kristian Høgsberg | e636fe2 | 2007-01-26 00:38:04 -0500 | [diff] [blame] | 1440 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1441 | self_id_count, ohci->self_id_buffer); |
| 1442 | } |
| 1443 | |
| 1444 | static irqreturn_t irq_handler(int irq, void *data) |
| 1445 | { |
| 1446 | struct fw_ohci *ohci = data; |
Stefan Richter | 168cf9a | 2010-02-14 18:49:18 +0100 | [diff] [blame] | 1447 | u32 event, iso_event; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1448 | int i; |
| 1449 | |
| 1450 | event = reg_read(ohci, OHCI1394_IntEventClear); |
| 1451 | |
Stefan Richter | a515958 | 2007-06-09 19:31:14 +0200 | [diff] [blame] | 1452 | if (!event || !~event) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1453 | return IRQ_NONE; |
| 1454 | |
Stefan Richter | a007bb8 | 2008-04-07 22:33:35 +0200 | [diff] [blame] | 1455 | /* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */ |
| 1456 | reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset); |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 1457 | log_irqs(event); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1458 | |
| 1459 | if (event & OHCI1394_selfIDComplete) |
| 1460 | tasklet_schedule(&ohci->bus_reset_tasklet); |
| 1461 | |
| 1462 | if (event & OHCI1394_RQPkt) |
| 1463 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); |
| 1464 | |
| 1465 | if (event & OHCI1394_RSPkt) |
| 1466 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); |
| 1467 | |
| 1468 | if (event & OHCI1394_reqTxComplete) |
| 1469 | tasklet_schedule(&ohci->at_request_ctx.tasklet); |
| 1470 | |
| 1471 | if (event & OHCI1394_respTxComplete) |
| 1472 | tasklet_schedule(&ohci->at_response_ctx.tasklet); |
| 1473 | |
Kristian Høgsberg | c889475 | 2007-02-16 17:34:36 -0500 | [diff] [blame] | 1474 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1475 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); |
| 1476 | |
| 1477 | while (iso_event) { |
| 1478 | i = ffs(iso_event) - 1; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 1479 | tasklet_schedule(&ohci->ir_context_list[i].context.tasklet); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1480 | iso_event &= ~(1 << i); |
| 1481 | } |
| 1482 | |
Kristian Høgsberg | c889475 | 2007-02-16 17:34:36 -0500 | [diff] [blame] | 1483 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1484 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); |
| 1485 | |
| 1486 | while (iso_event) { |
| 1487 | i = ffs(iso_event) - 1; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 1488 | tasklet_schedule(&ohci->it_context_list[i].context.tasklet); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1489 | iso_event &= ~(1 << i); |
| 1490 | } |
| 1491 | |
Jarod Wilson | 75f7832 | 2008-04-03 17:18:23 -0400 | [diff] [blame] | 1492 | if (unlikely(event & OHCI1394_regAccessFail)) |
| 1493 | fw_error("Register access failure - " |
| 1494 | "please notify linux1394-devel@lists.sf.net\n"); |
| 1495 | |
Stefan Richter | e524f61 | 2007-08-20 21:58:30 +0200 | [diff] [blame] | 1496 | if (unlikely(event & OHCI1394_postedWriteErr)) |
| 1497 | fw_error("PCI posted write error\n"); |
| 1498 | |
Stefan Richter | bb9f220 | 2007-12-22 22:14:52 +0100 | [diff] [blame] | 1499 | if (unlikely(event & OHCI1394_cycleTooLong)) { |
| 1500 | if (printk_ratelimit()) |
| 1501 | fw_notify("isochronous cycle too long\n"); |
| 1502 | reg_write(ohci, OHCI1394_LinkControlSet, |
| 1503 | OHCI1394_LinkControl_cycleMaster); |
| 1504 | } |
| 1505 | |
Jay Fenlason | 5ed1f32 | 2009-11-17 12:29:17 -0500 | [diff] [blame] | 1506 | if (unlikely(event & OHCI1394_cycleInconsistent)) { |
| 1507 | /* |
| 1508 | * We need to clear this event bit in order to make |
| 1509 | * cycleMatch isochronous I/O work. In theory we should |
| 1510 | * stop active cycleMatch iso contexts now and restart |
| 1511 | * them at least two cycles later. (FIXME?) |
| 1512 | */ |
| 1513 | if (printk_ratelimit()) |
| 1514 | fw_notify("isochronous cycle inconsistent\n"); |
| 1515 | } |
| 1516 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1517 | return IRQ_HANDLED; |
| 1518 | } |
| 1519 | |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1520 | static int software_reset(struct fw_ohci *ohci) |
| 1521 | { |
| 1522 | int i; |
| 1523 | |
| 1524 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); |
| 1525 | |
| 1526 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { |
| 1527 | if ((reg_read(ohci, OHCI1394_HCControlSet) & |
| 1528 | OHCI1394_HCControl_softReset) == 0) |
| 1529 | return 0; |
| 1530 | msleep(1); |
| 1531 | } |
| 1532 | |
| 1533 | return -EBUSY; |
| 1534 | } |
| 1535 | |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 1536 | static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length) |
| 1537 | { |
| 1538 | size_t size = length * 4; |
| 1539 | |
| 1540 | memcpy(dest, src, size); |
| 1541 | if (size < CONFIG_ROM_SIZE) |
| 1542 | memset(&dest[length], 0, CONFIG_ROM_SIZE - size); |
| 1543 | } |
| 1544 | |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 1545 | static int configure_1394a_enhancements(struct fw_ohci *ohci) |
| 1546 | { |
| 1547 | bool enable_1394a; |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 1548 | int ret, clear, set, offset; |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 1549 | |
| 1550 | /* Check if the driver should configure link and PHY. */ |
| 1551 | if (!(reg_read(ohci, OHCI1394_HCControlSet) & |
| 1552 | OHCI1394_HCControl_programPhyEnable)) |
| 1553 | return 0; |
| 1554 | |
| 1555 | /* Paranoia: check whether the PHY supports 1394a, too. */ |
| 1556 | enable_1394a = false; |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 1557 | ret = read_phy_reg(ohci, 2); |
| 1558 | if (ret < 0) |
| 1559 | return ret; |
| 1560 | if ((ret & PHY_EXTENDED_REGISTERS) == PHY_EXTENDED_REGISTERS) { |
| 1561 | ret = read_paged_phy_reg(ohci, 1, 8); |
| 1562 | if (ret < 0) |
| 1563 | return ret; |
| 1564 | if (ret >= 1) |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 1565 | enable_1394a = true; |
| 1566 | } |
| 1567 | |
| 1568 | if (ohci->quirks & QUIRK_NO_1394A) |
| 1569 | enable_1394a = false; |
| 1570 | |
| 1571 | /* Configure PHY and link consistently. */ |
| 1572 | if (enable_1394a) { |
| 1573 | clear = 0; |
| 1574 | set = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; |
| 1575 | } else { |
| 1576 | clear = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; |
| 1577 | set = 0; |
| 1578 | } |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 1579 | ret = ohci_update_phy_reg(&ohci->card, 5, clear, set); |
| 1580 | if (ret < 0) |
| 1581 | return ret; |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 1582 | |
| 1583 | if (enable_1394a) |
| 1584 | offset = OHCI1394_HCControlSet; |
| 1585 | else |
| 1586 | offset = OHCI1394_HCControlClear; |
| 1587 | reg_write(ohci, offset, OHCI1394_HCControl_aPhyEnhanceEnable); |
| 1588 | |
| 1589 | /* Clean up: configuration has been taken care of. */ |
| 1590 | reg_write(ohci, OHCI1394_HCControlClear, |
| 1591 | OHCI1394_HCControl_programPhyEnable); |
| 1592 | |
| 1593 | return 0; |
| 1594 | } |
| 1595 | |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 1596 | static int ohci_enable(struct fw_card *card, |
| 1597 | const __be32 *config_rom, size_t length) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1598 | { |
| 1599 | struct fw_ohci *ohci = fw_ohci(card); |
| 1600 | struct pci_dev *dev = to_pci_dev(card->device); |
Stefan Richter | 148c786 | 2010-06-05 11:46:49 +0200 | [diff] [blame] | 1601 | u32 lps, irqs; |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 1602 | int i, ret; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1603 | |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1604 | if (software_reset(ohci)) { |
| 1605 | fw_error("Failed to reset ohci card.\n"); |
| 1606 | return -EBUSY; |
| 1607 | } |
| 1608 | |
| 1609 | /* |
| 1610 | * Now enable LPS, which we need in order to start accessing |
| 1611 | * most of the registers. In fact, on some cards (ALI M5251), |
| 1612 | * accessing registers in the SClk domain without LPS enabled |
| 1613 | * will lock up the machine. Wait 50msec to make sure we have |
Jarod Wilson | 0221472 | 2008-03-28 10:02:50 -0400 | [diff] [blame] | 1614 | * full link enabled. However, with some cards (well, at least |
| 1615 | * a JMicron PCIe card), we have to try again sometimes. |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1616 | */ |
| 1617 | reg_write(ohci, OHCI1394_HCControlSet, |
| 1618 | OHCI1394_HCControl_LPS | |
| 1619 | OHCI1394_HCControl_postedWriteEnable); |
| 1620 | flush_writes(ohci); |
Jarod Wilson | 0221472 | 2008-03-28 10:02:50 -0400 | [diff] [blame] | 1621 | |
| 1622 | for (lps = 0, i = 0; !lps && i < 3; i++) { |
| 1623 | msleep(50); |
| 1624 | lps = reg_read(ohci, OHCI1394_HCControlSet) & |
| 1625 | OHCI1394_HCControl_LPS; |
| 1626 | } |
| 1627 | |
| 1628 | if (!lps) { |
| 1629 | fw_error("Failed to set Link Power Status\n"); |
| 1630 | return -EIO; |
| 1631 | } |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1632 | |
| 1633 | reg_write(ohci, OHCI1394_HCControlClear, |
| 1634 | OHCI1394_HCControl_noByteSwapData); |
| 1635 | |
Stefan Richter | affc9c2 | 2008-06-05 20:50:53 +0200 | [diff] [blame] | 1636 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); |
Stefan Richter | e896ec4 | 2008-06-05 20:49:38 +0200 | [diff] [blame] | 1637 | reg_write(ohci, OHCI1394_LinkControlClear, |
| 1638 | OHCI1394_LinkControl_rcvPhyPkt); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1639 | reg_write(ohci, OHCI1394_LinkControlSet, |
| 1640 | OHCI1394_LinkControl_rcvSelfID | |
| 1641 | OHCI1394_LinkControl_cycleTimerEnable | |
| 1642 | OHCI1394_LinkControl_cycleMaster); |
| 1643 | |
| 1644 | reg_write(ohci, OHCI1394_ATRetries, |
| 1645 | OHCI1394_MAX_AT_REQ_RETRIES | |
| 1646 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | |
| 1647 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8)); |
| 1648 | |
| 1649 | ar_context_run(&ohci->ar_request_ctx); |
| 1650 | ar_context_run(&ohci->ar_response_ctx); |
| 1651 | |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1652 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); |
| 1653 | reg_write(ohci, OHCI1394_IntEventClear, ~0); |
| 1654 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1655 | |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 1656 | ret = configure_1394a_enhancements(ohci); |
| 1657 | if (ret < 0) |
| 1658 | return ret; |
Clemens Ladisch | 925e7a6 | 2010-04-04 15:19:54 +0200 | [diff] [blame] | 1659 | |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1660 | /* Activate link_on bit and contender bit in our self ID packets.*/ |
Stefan Richter | 35d999b | 2010-04-10 16:04:56 +0200 | [diff] [blame] | 1661 | ret = ohci_update_phy_reg(card, 4, 0, PHY_LINK_ACTIVE | PHY_CONTENDER); |
| 1662 | if (ret < 0) |
| 1663 | return ret; |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 1664 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1665 | /* |
| 1666 | * When the link is not yet enabled, the atomic config rom |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1667 | * update mechanism described below in ohci_set_config_rom() |
| 1668 | * is not active. We have to update ConfigRomHeader and |
| 1669 | * BusOptions manually, and the write to ConfigROMmap takes |
| 1670 | * effect immediately. We tie this to the enabling of the |
| 1671 | * link, so we have a valid config rom before enabling - the |
| 1672 | * OHCI requires that ConfigROMhdr and BusOptions have valid |
| 1673 | * values before enabling. |
| 1674 | * |
| 1675 | * However, when the ConfigROMmap is written, some controllers |
| 1676 | * always read back quadlets 0 and 2 from the config rom to |
| 1677 | * the ConfigRomHeader and BusOptions registers on bus reset. |
| 1678 | * They shouldn't do that in this initial case where the link |
| 1679 | * isn't enabled. This means we have to use the same |
| 1680 | * workaround here, setting the bus header to 0 and then write |
| 1681 | * the right values in the bus reset tasklet. |
| 1682 | */ |
| 1683 | |
Kristian Høgsberg | 0bd243c | 2007-06-05 19:27:05 -0400 | [diff] [blame] | 1684 | if (config_rom) { |
| 1685 | ohci->next_config_rom = |
| 1686 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
| 1687 | &ohci->next_config_rom_bus, |
| 1688 | GFP_KERNEL); |
| 1689 | if (ohci->next_config_rom == NULL) |
| 1690 | return -ENOMEM; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1691 | |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 1692 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
Kristian Høgsberg | 0bd243c | 2007-06-05 19:27:05 -0400 | [diff] [blame] | 1693 | } else { |
| 1694 | /* |
| 1695 | * In the suspend case, config_rom is NULL, which |
| 1696 | * means that we just reuse the old config rom. |
| 1697 | */ |
| 1698 | ohci->next_config_rom = ohci->config_rom; |
| 1699 | ohci->next_config_rom_bus = ohci->config_rom_bus; |
| 1700 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1701 | |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 1702 | ohci->next_header = ohci->next_config_rom[0]; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1703 | ohci->next_config_rom[0] = 0; |
| 1704 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); |
Kristian Høgsberg | 0bd243c | 2007-06-05 19:27:05 -0400 | [diff] [blame] | 1705 | reg_write(ohci, OHCI1394_BusOptions, |
| 1706 | be32_to_cpu(ohci->next_config_rom[2])); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1707 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
| 1708 | |
| 1709 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); |
| 1710 | |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 1711 | if (!(ohci->quirks & QUIRK_NO_MSI)) |
| 1712 | pci_enable_msi(dev); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1713 | if (request_irq(dev->irq, irq_handler, |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 1714 | pci_dev_msi_enabled(dev) ? 0 : IRQF_SHARED, |
| 1715 | ohci_driver_name, ohci)) { |
| 1716 | fw_error("Failed to allocate interrupt %d.\n", dev->irq); |
| 1717 | pci_disable_msi(dev); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1718 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
| 1719 | ohci->config_rom, ohci->config_rom_bus); |
| 1720 | return -EIO; |
| 1721 | } |
| 1722 | |
Stefan Richter | 148c786 | 2010-06-05 11:46:49 +0200 | [diff] [blame] | 1723 | irqs = OHCI1394_reqTxComplete | OHCI1394_respTxComplete | |
| 1724 | OHCI1394_RQPkt | OHCI1394_RSPkt | |
| 1725 | OHCI1394_isochTx | OHCI1394_isochRx | |
| 1726 | OHCI1394_postedWriteErr | |
| 1727 | OHCI1394_selfIDComplete | |
| 1728 | OHCI1394_regAccessFail | |
| 1729 | OHCI1394_cycleInconsistent | OHCI1394_cycleTooLong | |
| 1730 | OHCI1394_masterIntEnable; |
| 1731 | if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) |
| 1732 | irqs |= OHCI1394_busReset; |
| 1733 | reg_write(ohci, OHCI1394_IntMaskSet, irqs); |
| 1734 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1735 | reg_write(ohci, OHCI1394_HCControlSet, |
| 1736 | OHCI1394_HCControl_linkEnable | |
| 1737 | OHCI1394_HCControl_BIBimageValid); |
| 1738 | flush_writes(ohci); |
| 1739 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1740 | /* |
| 1741 | * We are ready to go, initiate bus reset to finish the |
| 1742 | * initialization. |
| 1743 | */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1744 | |
| 1745 | fw_core_initiate_bus_reset(&ohci->card, 1); |
| 1746 | |
| 1747 | return 0; |
| 1748 | } |
| 1749 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1750 | static int ohci_set_config_rom(struct fw_card *card, |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 1751 | const __be32 *config_rom, size_t length) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1752 | { |
| 1753 | struct fw_ohci *ohci; |
| 1754 | unsigned long flags; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1755 | int ret = -EBUSY; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1756 | __be32 *next_config_rom; |
Stefan Richter | f5101d5 | 2008-03-14 00:27:49 +0100 | [diff] [blame] | 1757 | dma_addr_t uninitialized_var(next_config_rom_bus); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1758 | |
| 1759 | ohci = fw_ohci(card); |
| 1760 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1761 | /* |
| 1762 | * When the OHCI controller is enabled, the config rom update |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1763 | * mechanism is a bit tricky, but easy enough to use. See |
| 1764 | * section 5.5.6 in the OHCI specification. |
| 1765 | * |
| 1766 | * The OHCI controller caches the new config rom address in a |
| 1767 | * shadow register (ConfigROMmapNext) and needs a bus reset |
| 1768 | * for the changes to take place. When the bus reset is |
| 1769 | * detected, the controller loads the new values for the |
| 1770 | * ConfigRomHeader and BusOptions registers from the specified |
| 1771 | * config rom and loads ConfigROMmap from the ConfigROMmapNext |
| 1772 | * shadow register. All automatically and atomically. |
| 1773 | * |
| 1774 | * Now, there's a twist to this story. The automatic load of |
| 1775 | * ConfigRomHeader and BusOptions doesn't honor the |
| 1776 | * noByteSwapData bit, so with a be32 config rom, the |
| 1777 | * controller will load be32 values in to these registers |
| 1778 | * during the atomic update, even on litte endian |
| 1779 | * architectures. The workaround we use is to put a 0 in the |
| 1780 | * header quadlet; 0 is endian agnostic and means that the |
| 1781 | * config rom isn't ready yet. In the bus reset tasklet we |
| 1782 | * then set up the real values for the two registers. |
| 1783 | * |
| 1784 | * We use ohci->lock to avoid racing with the code that sets |
| 1785 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). |
| 1786 | */ |
| 1787 | |
| 1788 | next_config_rom = |
| 1789 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
| 1790 | &next_config_rom_bus, GFP_KERNEL); |
| 1791 | if (next_config_rom == NULL) |
| 1792 | return -ENOMEM; |
| 1793 | |
| 1794 | spin_lock_irqsave(&ohci->lock, flags); |
| 1795 | |
| 1796 | if (ohci->next_config_rom == NULL) { |
| 1797 | ohci->next_config_rom = next_config_rom; |
| 1798 | ohci->next_config_rom_bus = next_config_rom_bus; |
| 1799 | |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 1800 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1801 | |
| 1802 | ohci->next_header = config_rom[0]; |
| 1803 | ohci->next_config_rom[0] = 0; |
| 1804 | |
| 1805 | reg_write(ohci, OHCI1394_ConfigROMmap, |
| 1806 | ohci->next_config_rom_bus); |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1807 | ret = 0; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1808 | } |
| 1809 | |
| 1810 | spin_unlock_irqrestore(&ohci->lock, flags); |
| 1811 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1812 | /* |
| 1813 | * Now initiate a bus reset to have the changes take |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1814 | * effect. We clean up the old config rom memory and DMA |
| 1815 | * mappings in the bus reset tasklet, since the OHCI |
| 1816 | * controller could need to access it before the bus reset |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1817 | * takes effect. |
| 1818 | */ |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1819 | if (ret == 0) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1820 | fw_core_initiate_bus_reset(&ohci->card, 1); |
Stefan Richter | 4eaff7d | 2007-07-25 19:18:08 +0200 | [diff] [blame] | 1821 | else |
| 1822 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
| 1823 | next_config_rom, next_config_rom_bus); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1824 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1825 | return ret; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1826 | } |
| 1827 | |
| 1828 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) |
| 1829 | { |
| 1830 | struct fw_ohci *ohci = fw_ohci(card); |
| 1831 | |
| 1832 | at_context_transmit(&ohci->at_request_ctx, packet); |
| 1833 | } |
| 1834 | |
| 1835 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) |
| 1836 | { |
| 1837 | struct fw_ohci *ohci = fw_ohci(card); |
| 1838 | |
| 1839 | at_context_transmit(&ohci->at_response_ctx, packet); |
| 1840 | } |
| 1841 | |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 1842 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
| 1843 | { |
| 1844 | struct fw_ohci *ohci = fw_ohci(card); |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1845 | struct context *ctx = &ohci->at_request_ctx; |
| 1846 | struct driver_data *driver_data = packet->driver_data; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1847 | int ret = -ENOENT; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 1848 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1849 | tasklet_disable(&ctx->tasklet); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 1850 | |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1851 | if (packet->ack != 0) |
| 1852 | goto out; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 1853 | |
Stefan Richter | 19593ff | 2009-10-14 20:40:10 +0200 | [diff] [blame] | 1854 | if (packet->payload_mapped) |
Stefan Richter | 1d1dc5e | 2008-12-10 00:20:38 +0100 | [diff] [blame] | 1855 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
| 1856 | packet->payload_length, DMA_TO_DEVICE); |
| 1857 | |
Stefan Richter | ad3c0fe | 2008-03-20 22:04:36 +0100 | [diff] [blame] | 1858 | log_ar_at_event('T', packet->speed, packet->header, 0x20); |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1859 | driver_data->packet = NULL; |
| 1860 | packet->ack = RCODE_CANCELLED; |
| 1861 | packet->callback(packet, &ohci->card, packet->ack); |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1862 | ret = 0; |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 1863 | out: |
| 1864 | tasklet_enable(&ctx->tasklet); |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 1865 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1866 | return ret; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 1867 | } |
| 1868 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1869 | static int ohci_enable_phys_dma(struct fw_card *card, |
| 1870 | int node_id, int generation) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1871 | { |
Stefan Richter | 080de8c | 2008-02-28 20:54:43 +0100 | [diff] [blame] | 1872 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
| 1873 | return 0; |
| 1874 | #else |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1875 | struct fw_ohci *ohci = fw_ohci(card); |
| 1876 | unsigned long flags; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1877 | int n, ret = 0; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1878 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1879 | /* |
| 1880 | * FIXME: Make sure this bitmask is cleared when we clear the busReset |
| 1881 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. |
| 1882 | */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1883 | |
| 1884 | spin_lock_irqsave(&ohci->lock, flags); |
| 1885 | |
| 1886 | if (ohci->generation != generation) { |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1887 | ret = -ESTALE; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1888 | goto out; |
| 1889 | } |
| 1890 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1891 | /* |
| 1892 | * Note, if the node ID contains a non-local bus ID, physical DMA is |
| 1893 | * enabled for _all_ nodes on remote buses. |
| 1894 | */ |
Stefan Richter | 907293d | 2007-01-23 21:11:43 +0100 | [diff] [blame] | 1895 | |
| 1896 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; |
| 1897 | if (n < 32) |
| 1898 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); |
| 1899 | else |
| 1900 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); |
| 1901 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1902 | flush_writes(ohci); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1903 | out: |
Stefan Richter | 6cad95f | 2007-01-21 20:46:45 +0100 | [diff] [blame] | 1904 | spin_unlock_irqrestore(&ohci->lock, flags); |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1905 | |
| 1906 | return ret; |
Stefan Richter | 080de8c | 2008-02-28 20:54:43 +0100 | [diff] [blame] | 1907 | #endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 1908 | } |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 1909 | |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1910 | static u32 cycle_timer_ticks(u32 cycle_timer) |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 1911 | { |
| 1912 | u32 ticks; |
| 1913 | |
| 1914 | ticks = cycle_timer & 0xfff; |
| 1915 | ticks += 3072 * ((cycle_timer >> 12) & 0x1fff); |
| 1916 | ticks += (3072 * 8000) * (cycle_timer >> 25); |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1917 | |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 1918 | return ticks; |
| 1919 | } |
| 1920 | |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1921 | /* |
| 1922 | * Some controllers exhibit one or more of the following bugs when updating the |
| 1923 | * iso cycle timer register: |
| 1924 | * - When the lowest six bits are wrapping around to zero, a read that happens |
| 1925 | * at the same time will return garbage in the lowest ten bits. |
| 1926 | * - When the cycleOffset field wraps around to zero, the cycleCount field is |
| 1927 | * not incremented for about 60 ns. |
| 1928 | * - Occasionally, the entire register reads zero. |
| 1929 | * |
| 1930 | * To catch these, we read the register three times and ensure that the |
| 1931 | * difference between each two consecutive reads is approximately the same, i.e. |
| 1932 | * less than twice the other. Furthermore, any negative difference indicates an |
| 1933 | * error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to |
| 1934 | * execute, so we have enough precision to compute the ratio of the differences.) |
| 1935 | */ |
Stefan Richter | 168cf9a | 2010-02-14 18:49:18 +0100 | [diff] [blame] | 1936 | static u32 ohci_get_cycle_time(struct fw_card *card) |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1937 | { |
| 1938 | struct fw_ohci *ohci = fw_ohci(card); |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 1939 | u32 c0, c1, c2; |
| 1940 | u32 t0, t1, t2; |
| 1941 | s32 diff01, diff12; |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1942 | int i; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1943 | |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1944 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); |
| 1945 | |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 1946 | if (ohci->quirks & QUIRK_CYCLE_TIMER) { |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1947 | i = 0; |
| 1948 | c1 = c2; |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 1949 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 1950 | do { |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1951 | c0 = c1; |
| 1952 | c1 = c2; |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 1953 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); |
| 1954 | t0 = cycle_timer_ticks(c0); |
| 1955 | t1 = cycle_timer_ticks(c1); |
| 1956 | t2 = cycle_timer_ticks(c2); |
| 1957 | diff01 = t1 - t0; |
| 1958 | diff12 = t2 - t1; |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1959 | } while ((diff01 <= 0 || diff12 <= 0 || |
| 1960 | diff01 / diff12 >= 2 || diff12 / diff01 >= 2) |
| 1961 | && i++ < 20); |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 1962 | } |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1963 | |
Stefan Richter | 168cf9a | 2010-02-14 18:49:18 +0100 | [diff] [blame] | 1964 | return c2; |
Kristian Høgsberg | d60d7f1 | 2007-03-07 12:12:56 -0500 | [diff] [blame] | 1965 | } |
| 1966 | |
David Moore | 1aa292b | 2008-07-22 23:23:40 -0700 | [diff] [blame] | 1967 | static void copy_iso_headers(struct iso_context *ctx, void *p) |
| 1968 | { |
| 1969 | int i = ctx->header_length; |
| 1970 | |
| 1971 | if (i + ctx->base.header_size > PAGE_SIZE) |
| 1972 | return; |
| 1973 | |
| 1974 | /* |
| 1975 | * The iso header is byteswapped to little endian by |
| 1976 | * the controller, but the remaining header quadlets |
| 1977 | * are big endian. We want to present all the headers |
| 1978 | * as big endian, so we have to swap the first quadlet. |
| 1979 | */ |
| 1980 | if (ctx->base.header_size > 0) |
| 1981 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); |
| 1982 | if (ctx->base.header_size > 4) |
| 1983 | *(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p); |
| 1984 | if (ctx->base.header_size > 8) |
| 1985 | memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8); |
| 1986 | ctx->header_length += ctx->base.header_size; |
| 1987 | } |
| 1988 | |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 1989 | static int handle_ir_packet_per_buffer(struct context *context, |
| 1990 | struct descriptor *d, |
| 1991 | struct descriptor *last) |
| 1992 | { |
| 1993 | struct iso_context *ctx = |
| 1994 | container_of(context, struct iso_context, context); |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 1995 | struct descriptor *pd; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 1996 | __le32 *ir_header; |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 1997 | void *p; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 1998 | |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 1999 | for (pd = d; pd <= last; pd++) { |
| 2000 | if (pd->transfer_status) |
| 2001 | break; |
| 2002 | } |
| 2003 | if (pd > last) |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2004 | /* Descriptor(s) not done yet, stop iteration */ |
| 2005 | return 0; |
| 2006 | |
David Moore | 1aa292b | 2008-07-22 23:23:40 -0700 | [diff] [blame] | 2007 | p = last + 1; |
| 2008 | copy_iso_headers(ctx, p); |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2009 | |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2010 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { |
| 2011 | ir_header = (__le32 *) p; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2012 | ctx->base.callback(&ctx->base, |
| 2013 | le32_to_cpu(ir_header[0]) & 0xffff, |
| 2014 | ctx->header_length, ctx->header, |
| 2015 | ctx->base.callback_data); |
| 2016 | ctx->header_length = 0; |
| 2017 | } |
| 2018 | |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2019 | return 1; |
| 2020 | } |
| 2021 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2022 | static int handle_it_packet(struct context *context, |
| 2023 | struct descriptor *d, |
| 2024 | struct descriptor *last) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2025 | { |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2026 | struct iso_context *ctx = |
| 2027 | container_of(context, struct iso_context, context); |
Jay Fenlason | 31769ce | 2009-11-21 00:05:56 +0100 | [diff] [blame] | 2028 | int i; |
| 2029 | struct descriptor *pd; |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2030 | |
Jay Fenlason | 31769ce | 2009-11-21 00:05:56 +0100 | [diff] [blame] | 2031 | for (pd = d; pd <= last; pd++) |
| 2032 | if (pd->transfer_status) |
| 2033 | break; |
| 2034 | if (pd > last) |
| 2035 | /* Descriptor(s) not done yet, stop iteration */ |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2036 | return 0; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2037 | |
Jay Fenlason | 31769ce | 2009-11-21 00:05:56 +0100 | [diff] [blame] | 2038 | i = ctx->header_length; |
| 2039 | if (i + 4 < PAGE_SIZE) { |
| 2040 | /* Present this value as big-endian to match the receive code */ |
| 2041 | *(__be32 *)(ctx->header + i) = cpu_to_be32( |
| 2042 | ((u32)le16_to_cpu(pd->transfer_status) << 16) | |
| 2043 | le16_to_cpu(pd->res_count)); |
| 2044 | ctx->header_length += 4; |
| 2045 | } |
| 2046 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 2047 | ctx->base.callback(&ctx->base, le16_to_cpu(last->res_count), |
Jay Fenlason | 31769ce | 2009-11-21 00:05:56 +0100 | [diff] [blame] | 2048 | ctx->header_length, ctx->header, |
| 2049 | ctx->base.callback_data); |
| 2050 | ctx->header_length = 0; |
| 2051 | } |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2052 | return 1; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2053 | } |
| 2054 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 2055 | static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2056 | int type, int channel, size_t header_size) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2057 | { |
| 2058 | struct fw_ohci *ohci = fw_ohci(card); |
| 2059 | struct iso_context *ctx, *list; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2060 | descriptor_callback_t callback; |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2061 | u64 *channels, dont_care = ~0ULL; |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2062 | u32 *mask, regs; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2063 | unsigned long flags; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 2064 | int index, ret = -ENOMEM; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2065 | |
| 2066 | if (type == FW_ISO_CONTEXT_TRANSMIT) { |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2067 | channels = &dont_care; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2068 | mask = &ohci->it_context_mask; |
| 2069 | list = ohci->it_context_list; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2070 | callback = handle_it_packet; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2071 | } else { |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2072 | channels = &ohci->ir_context_channels; |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2073 | mask = &ohci->ir_context_mask; |
| 2074 | list = ohci->ir_context_list; |
Stefan Richter | 6498ba0 | 2010-02-21 17:57:05 +0100 | [diff] [blame] | 2075 | callback = handle_ir_packet_per_buffer; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2076 | } |
| 2077 | |
| 2078 | spin_lock_irqsave(&ohci->lock, flags); |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2079 | index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1; |
| 2080 | if (index >= 0) { |
| 2081 | *channels &= ~(1ULL << channel); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2082 | *mask &= ~(1 << index); |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2083 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2084 | spin_unlock_irqrestore(&ohci->lock, flags); |
| 2085 | |
| 2086 | if (index < 0) |
| 2087 | return ERR_PTR(-EBUSY); |
| 2088 | |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2089 | if (type == FW_ISO_CONTEXT_TRANSMIT) |
| 2090 | regs = OHCI1394_IsoXmitContextBase(index); |
| 2091 | else |
| 2092 | regs = OHCI1394_IsoRcvContextBase(index); |
| 2093 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2094 | ctx = &list[index]; |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 2095 | memset(ctx, 0, sizeof(*ctx)); |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 2096 | ctx->header_length = 0; |
| 2097 | ctx->header = (void *) __get_free_page(GFP_KERNEL); |
| 2098 | if (ctx->header == NULL) |
| 2099 | goto out; |
| 2100 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 2101 | ret = context_init(&ctx->context, ohci, regs, callback); |
| 2102 | if (ret < 0) |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 2103 | goto out_with_header; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2104 | |
| 2105 | return &ctx->base; |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 2106 | |
| 2107 | out_with_header: |
| 2108 | free_page((unsigned long)ctx->header); |
| 2109 | out: |
| 2110 | spin_lock_irqsave(&ohci->lock, flags); |
| 2111 | *mask |= 1 << index; |
| 2112 | spin_unlock_irqrestore(&ohci->lock, flags); |
| 2113 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 2114 | return ERR_PTR(ret); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2115 | } |
| 2116 | |
Kristian Høgsberg | eb0306e | 2007-03-14 17:34:54 -0400 | [diff] [blame] | 2117 | static int ohci_start_iso(struct fw_iso_context *base, |
| 2118 | s32 cycle, u32 sync, u32 tags) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2119 | { |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2120 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2121 | struct fw_ohci *ohci = ctx->context.ohci; |
Kristian Høgsberg | 8a2f7d9 | 2007-03-28 14:26:10 -0400 | [diff] [blame] | 2122 | u32 control, match; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2123 | int index; |
| 2124 | |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2125 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { |
| 2126 | index = ctx - ohci->it_context_list; |
Kristian Høgsberg | 8a2f7d9 | 2007-03-28 14:26:10 -0400 | [diff] [blame] | 2127 | match = 0; |
| 2128 | if (cycle >= 0) |
| 2129 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2130 | (cycle & 0x7fff) << 16; |
Kristian Høgsberg | 21efb3c | 2007-02-16 17:34:50 -0500 | [diff] [blame] | 2131 | |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2132 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
| 2133 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); |
Kristian Høgsberg | 8a2f7d9 | 2007-03-28 14:26:10 -0400 | [diff] [blame] | 2134 | context_run(&ctx->context, match); |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2135 | } else { |
| 2136 | index = ctx - ohci->ir_context_list; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2137 | control = IR_CONTEXT_ISOCH_HEADER; |
Kristian Høgsberg | 8a2f7d9 | 2007-03-28 14:26:10 -0400 | [diff] [blame] | 2138 | match = (tags << 28) | (sync << 8) | ctx->base.channel; |
| 2139 | if (cycle >= 0) { |
| 2140 | match |= (cycle & 0x07fff) << 12; |
| 2141 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; |
| 2142 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2143 | |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2144 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
| 2145 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 2146 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
Kristian Høgsberg | 8a2f7d9 | 2007-03-28 14:26:10 -0400 | [diff] [blame] | 2147 | context_run(&ctx->context, control); |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2148 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2149 | |
| 2150 | return 0; |
| 2151 | } |
| 2152 | |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 2153 | static int ohci_stop_iso(struct fw_iso_context *base) |
| 2154 | { |
| 2155 | struct fw_ohci *ohci = fw_ohci(base->card); |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2156 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 2157 | int index; |
| 2158 | |
| 2159 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { |
| 2160 | index = ctx - ohci->it_context_list; |
| 2161 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); |
| 2162 | } else { |
| 2163 | index = ctx - ohci->ir_context_list; |
| 2164 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); |
| 2165 | } |
| 2166 | flush_writes(ohci); |
| 2167 | context_stop(&ctx->context); |
| 2168 | |
| 2169 | return 0; |
| 2170 | } |
| 2171 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2172 | static void ohci_free_iso_context(struct fw_iso_context *base) |
| 2173 | { |
| 2174 | struct fw_ohci *ohci = fw_ohci(base->card); |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2175 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2176 | unsigned long flags; |
| 2177 | int index; |
| 2178 | |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 2179 | ohci_stop_iso(base); |
| 2180 | context_release(&ctx->context); |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 2181 | free_page((unsigned long)ctx->header); |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 2182 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2183 | spin_lock_irqsave(&ohci->lock, flags); |
| 2184 | |
| 2185 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { |
| 2186 | index = ctx - ohci->it_context_list; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2187 | ohci->it_context_mask |= 1 << index; |
| 2188 | } else { |
| 2189 | index = ctx - ohci->ir_context_list; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2190 | ohci->ir_context_mask |= 1 << index; |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2191 | ohci->ir_context_channels |= 1ULL << base->channel; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2192 | } |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2193 | |
| 2194 | spin_unlock_irqrestore(&ohci->lock, flags); |
| 2195 | } |
| 2196 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 2197 | static int ohci_queue_iso_transmit(struct fw_iso_context *base, |
| 2198 | struct fw_iso_packet *packet, |
| 2199 | struct fw_iso_buffer *buffer, |
| 2200 | unsigned long payload) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2201 | { |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2202 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2203 | struct descriptor *d, *last, *pd; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2204 | struct fw_iso_packet *p; |
| 2205 | __le32 *header; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 2206 | dma_addr_t d_bus, page_bus; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2207 | u32 z, header_z, payload_z, irq; |
| 2208 | u32 payload_index, payload_end_index, next_page_index; |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2209 | int page, end_page, i, length, offset; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2210 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2211 | p = packet; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 2212 | payload_index = payload; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2213 | |
| 2214 | if (p->skip) |
| 2215 | z = 1; |
| 2216 | else |
| 2217 | z = 2; |
| 2218 | if (p->header_length > 0) |
| 2219 | z++; |
| 2220 | |
| 2221 | /* Determine the first page the payload isn't contained in. */ |
| 2222 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; |
| 2223 | if (p->payload_length > 0) |
| 2224 | payload_z = end_page - (payload_index >> PAGE_SHIFT); |
| 2225 | else |
| 2226 | payload_z = 0; |
| 2227 | |
| 2228 | z += payload_z; |
| 2229 | |
| 2230 | /* Get header size in number of descriptors. */ |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 2231 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2232 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2233 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
| 2234 | if (d == NULL) |
| 2235 | return -ENOMEM; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2236 | |
| 2237 | if (!p->skip) { |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 2238 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2239 | d[0].req_count = cpu_to_le16(8); |
Clemens Ladisch | 7f51a10 | 2010-02-08 08:30:03 +0100 | [diff] [blame] | 2240 | /* |
| 2241 | * Link the skip address to this descriptor itself. This causes |
| 2242 | * a context to skip a cycle whenever lost cycles or FIFO |
| 2243 | * overruns occur, without dropping the data. The application |
| 2244 | * should then decide whether this is an error condition or not. |
| 2245 | * FIXME: Make the context's cycle-lost behaviour configurable? |
| 2246 | */ |
| 2247 | d[0].branch_address = cpu_to_le32(d_bus | z); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2248 | |
| 2249 | header = (__le32 *) &d[1]; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 2250 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
| 2251 | IT_HEADER_TAG(p->tag) | |
| 2252 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | |
| 2253 | IT_HEADER_CHANNEL(ctx->base.channel) | |
| 2254 | IT_HEADER_SPEED(ctx->base.speed)); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2255 | header[1] = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 2256 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2257 | p->payload_length)); |
| 2258 | } |
| 2259 | |
| 2260 | if (p->header_length > 0) { |
| 2261 | d[2].req_count = cpu_to_le16(p->header_length); |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 2262 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2263 | memcpy(&d[z], p->header, p->header_length); |
| 2264 | } |
| 2265 | |
| 2266 | pd = d + z - payload_z; |
| 2267 | payload_end_index = payload_index + p->payload_length; |
| 2268 | for (i = 0; i < payload_z; i++) { |
| 2269 | page = payload_index >> PAGE_SHIFT; |
| 2270 | offset = payload_index & ~PAGE_MASK; |
| 2271 | next_page_index = (page + 1) << PAGE_SHIFT; |
| 2272 | length = |
| 2273 | min(next_page_index, payload_end_index) - payload_index; |
| 2274 | pd[i].req_count = cpu_to_le16(length); |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 2275 | |
| 2276 | page_bus = page_private(buffer->pages[page]); |
| 2277 | pd[i].data_address = cpu_to_le32(page_bus + offset); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2278 | |
| 2279 | payload_index += length; |
| 2280 | } |
| 2281 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2282 | if (p->interrupt) |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 2283 | irq = DESCRIPTOR_IRQ_ALWAYS; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2284 | else |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 2285 | irq = DESCRIPTOR_NO_IRQ; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2286 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2287 | last = z == 2 ? d : d + z - 1; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 2288 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
| 2289 | DESCRIPTOR_STATUS | |
| 2290 | DESCRIPTOR_BRANCH_ALWAYS | |
Kristian Høgsberg | cbb59da | 2007-02-16 17:34:35 -0500 | [diff] [blame] | 2291 | irq); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2292 | |
Kristian Høgsberg | 3020073 | 2007-02-16 17:34:39 -0500 | [diff] [blame] | 2293 | context_append(&ctx->context, d, z, header_z); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2294 | |
| 2295 | return 0; |
| 2296 | } |
Stefan Richter | 373b2ed | 2007-03-04 14:45:18 +0100 | [diff] [blame] | 2297 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 2298 | static int ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base, |
| 2299 | struct fw_iso_packet *packet, |
| 2300 | struct fw_iso_buffer *buffer, |
| 2301 | unsigned long payload) |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2302 | { |
| 2303 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
Jay Fenlason | 8c0c0cc | 2009-12-11 14:23:58 -0500 | [diff] [blame] | 2304 | struct descriptor *d, *pd; |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2305 | struct fw_iso_packet *p = packet; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2306 | dma_addr_t d_bus, page_bus; |
| 2307 | u32 z, header_z, rest; |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2308 | int i, j, length; |
| 2309 | int page, offset, packet_count, header_size, payload_per_buffer; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2310 | |
| 2311 | /* |
David Moore | 1aa292b | 2008-07-22 23:23:40 -0700 | [diff] [blame] | 2312 | * The OHCI controller puts the isochronous header and trailer in the |
| 2313 | * buffer, so we need at least 8 bytes. |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2314 | */ |
| 2315 | packet_count = p->header_length / ctx->base.header_size; |
David Moore | 1aa292b | 2008-07-22 23:23:40 -0700 | [diff] [blame] | 2316 | header_size = max(ctx->base.header_size, (size_t)8); |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2317 | |
| 2318 | /* Get header size in number of descriptors. */ |
| 2319 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); |
| 2320 | page = payload >> PAGE_SHIFT; |
| 2321 | offset = payload & ~PAGE_MASK; |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2322 | payload_per_buffer = p->payload_length / packet_count; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2323 | |
| 2324 | for (i = 0; i < packet_count; i++) { |
| 2325 | /* d points to the header descriptor */ |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2326 | z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2327 | d = context_get_descriptors(&ctx->context, |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2328 | z + header_z, &d_bus); |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2329 | if (d == NULL) |
| 2330 | return -ENOMEM; |
| 2331 | |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2332 | d->control = cpu_to_le16(DESCRIPTOR_STATUS | |
| 2333 | DESCRIPTOR_INPUT_MORE); |
| 2334 | if (p->skip && i == 0) |
| 2335 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2336 | d->req_count = cpu_to_le16(header_size); |
| 2337 | d->res_count = d->req_count; |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2338 | d->transfer_status = 0; |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2339 | d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d))); |
| 2340 | |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2341 | rest = payload_per_buffer; |
Jay Fenlason | 8c0c0cc | 2009-12-11 14:23:58 -0500 | [diff] [blame] | 2342 | pd = d; |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2343 | for (j = 1; j < z; j++) { |
Jay Fenlason | 8c0c0cc | 2009-12-11 14:23:58 -0500 | [diff] [blame] | 2344 | pd++; |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2345 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
| 2346 | DESCRIPTOR_INPUT_MORE); |
| 2347 | |
| 2348 | if (offset + rest < PAGE_SIZE) |
| 2349 | length = rest; |
| 2350 | else |
| 2351 | length = PAGE_SIZE - offset; |
| 2352 | pd->req_count = cpu_to_le16(length); |
| 2353 | pd->res_count = pd->req_count; |
| 2354 | pd->transfer_status = 0; |
| 2355 | |
| 2356 | page_bus = page_private(buffer->pages[page]); |
| 2357 | pd->data_address = cpu_to_le32(page_bus + offset); |
| 2358 | |
| 2359 | offset = (offset + length) & ~PAGE_MASK; |
| 2360 | rest -= length; |
| 2361 | if (offset == 0) |
| 2362 | page++; |
| 2363 | } |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2364 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
| 2365 | DESCRIPTOR_INPUT_LAST | |
| 2366 | DESCRIPTOR_BRANCH_ALWAYS); |
David Moore | bcee893 | 2007-12-19 15:26:38 -0500 | [diff] [blame] | 2367 | if (p->interrupt && i == packet_count - 1) |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2368 | pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
| 2369 | |
Jarod Wilson | a186b4a | 2007-12-03 13:43:12 -0500 | [diff] [blame] | 2370 | context_append(&ctx->context, d, z, header_z); |
| 2371 | } |
| 2372 | |
| 2373 | return 0; |
| 2374 | } |
| 2375 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 2376 | static int ohci_queue_iso(struct fw_iso_context *base, |
| 2377 | struct fw_iso_packet *packet, |
| 2378 | struct fw_iso_buffer *buffer, |
| 2379 | unsigned long payload) |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2380 | { |
Kristian Høgsberg | e364cf4 | 2007-02-16 17:34:49 -0500 | [diff] [blame] | 2381 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 2382 | unsigned long flags; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 2383 | int ret; |
Kristian Høgsberg | e364cf4 | 2007-02-16 17:34:49 -0500 | [diff] [blame] | 2384 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 2385 | spin_lock_irqsave(&ctx->context.ohci->lock, flags); |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2386 | if (base->type == FW_ISO_CONTEXT_TRANSMIT) |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 2387 | ret = ohci_queue_iso_transmit(base, packet, buffer, payload); |
Kristian Høgsberg | e364cf4 | 2007-02-16 17:34:49 -0500 | [diff] [blame] | 2388 | else |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 2389 | ret = ohci_queue_iso_receive_packet_per_buffer(base, packet, |
| 2390 | buffer, payload); |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 2391 | spin_unlock_irqrestore(&ctx->context.ohci->lock, flags); |
| 2392 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 2393 | return ret; |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 2394 | } |
| 2395 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 2396 | static const struct fw_card_driver ohci_driver = { |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2397 | .enable = ohci_enable, |
| 2398 | .update_phy_reg = ohci_update_phy_reg, |
| 2399 | .set_config_rom = ohci_set_config_rom, |
| 2400 | .send_request = ohci_send_request, |
| 2401 | .send_response = ohci_send_response, |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 2402 | .cancel_packet = ohci_cancel_packet, |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2403 | .enable_phys_dma = ohci_enable_phys_dma, |
Stefan Richter | 168cf9a | 2010-02-14 18:49:18 +0100 | [diff] [blame] | 2404 | .get_cycle_time = ohci_get_cycle_time, |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2405 | |
| 2406 | .allocate_iso_context = ohci_allocate_iso_context, |
| 2407 | .free_iso_context = ohci_free_iso_context, |
| 2408 | .queue_iso = ohci_queue_iso, |
Kristian Høgsberg | 69cdb72 | 2007-02-16 17:34:41 -0500 | [diff] [blame] | 2409 | .start_iso = ohci_start_iso, |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 2410 | .stop_iso = ohci_stop_iso, |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2411 | }; |
| 2412 | |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2413 | #ifdef CONFIG_PPC_PMAC |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2414 | static void pmac_ohci_on(struct pci_dev *dev) |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2415 | { |
| 2416 | if (machine_is(powermac)) { |
| 2417 | struct device_node *ofn = pci_device_to_OF_node(dev); |
| 2418 | |
| 2419 | if (ofn) { |
| 2420 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); |
| 2421 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); |
| 2422 | } |
| 2423 | } |
| 2424 | } |
| 2425 | |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2426 | static void pmac_ohci_off(struct pci_dev *dev) |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2427 | { |
| 2428 | if (machine_is(powermac)) { |
| 2429 | struct device_node *ofn = pci_device_to_OF_node(dev); |
| 2430 | |
| 2431 | if (ofn) { |
| 2432 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); |
| 2433 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); |
| 2434 | } |
| 2435 | } |
| 2436 | } |
| 2437 | #else |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2438 | static inline void pmac_ohci_on(struct pci_dev *dev) {} |
| 2439 | static inline void pmac_ohci_off(struct pci_dev *dev) {} |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2440 | #endif /* CONFIG_PPC_PMAC */ |
| 2441 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 2442 | static int __devinit pci_probe(struct pci_dev *dev, |
| 2443 | const struct pci_device_id *ent) |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2444 | { |
| 2445 | struct fw_ohci *ohci; |
Clemens Ladisch | 5467238 | 2010-04-01 16:43:59 +0200 | [diff] [blame] | 2446 | u32 bus_options, max_receive, link_speed, version, link_enh; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2447 | u64 guid; |
Stefan Richter | 6fdb2ee | 2010-02-21 17:59:14 +0100 | [diff] [blame] | 2448 | int i, err, n_ir, n_it; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2449 | size_t size; |
| 2450 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 2451 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2452 | if (ohci == NULL) { |
Stefan Richter | 7007a07 | 2008-10-26 09:50:31 +0100 | [diff] [blame] | 2453 | err = -ENOMEM; |
| 2454 | goto fail; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2455 | } |
| 2456 | |
| 2457 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); |
| 2458 | |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2459 | pmac_ohci_on(dev); |
Stefan Richter | 130d549 | 2008-03-24 20:55:28 +0100 | [diff] [blame] | 2460 | |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2461 | err = pci_enable_device(dev); |
| 2462 | if (err) { |
Stefan Richter | 7007a07 | 2008-10-26 09:50:31 +0100 | [diff] [blame] | 2463 | fw_error("Failed to enable OHCI hardware\n"); |
Stefan Richter | bd7dee6 | 2008-02-24 18:59:55 +0100 | [diff] [blame] | 2464 | goto fail_free; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2465 | } |
| 2466 | |
| 2467 | pci_set_master(dev); |
| 2468 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); |
| 2469 | pci_set_drvdata(dev, ohci); |
| 2470 | |
| 2471 | spin_lock_init(&ohci->lock); |
| 2472 | |
| 2473 | tasklet_init(&ohci->bus_reset_tasklet, |
| 2474 | bus_reset_tasklet, (unsigned long)ohci); |
| 2475 | |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2476 | err = pci_request_region(dev, 0, ohci_driver_name); |
| 2477 | if (err) { |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2478 | fw_error("MMIO resource unavailable\n"); |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2479 | goto fail_disable; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2480 | } |
| 2481 | |
| 2482 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); |
| 2483 | if (ohci->registers == NULL) { |
| 2484 | fw_error("Failed to remap registers\n"); |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2485 | err = -ENXIO; |
| 2486 | goto fail_iomem; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2487 | } |
| 2488 | |
Stefan Richter | 4a63559 | 2010-02-21 17:58:01 +0100 | [diff] [blame] | 2489 | for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++) |
| 2490 | if (ohci_quirks[i].vendor == dev->vendor && |
| 2491 | (ohci_quirks[i].device == dev->device || |
| 2492 | ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) { |
| 2493 | ohci->quirks = ohci_quirks[i].flags; |
| 2494 | break; |
| 2495 | } |
Stefan Richter | 3e9cc2f | 2010-02-21 17:58:29 +0100 | [diff] [blame] | 2496 | if (param_quirks) |
| 2497 | ohci->quirks = param_quirks; |
Clemens Ladisch | b677532 | 2010-01-20 09:58:02 +0100 | [diff] [blame] | 2498 | |
Clemens Ladisch | 5467238 | 2010-04-01 16:43:59 +0200 | [diff] [blame] | 2499 | /* TI OHCI-Lynx and compatible: set recommended configuration bits. */ |
| 2500 | if (dev->vendor == PCI_VENDOR_ID_TI) { |
| 2501 | pci_read_config_dword(dev, PCI_CFG_TI_LinkEnh, &link_enh); |
| 2502 | |
| 2503 | /* adjust latency of ATx FIFO: use 1.7 KB threshold */ |
| 2504 | link_enh &= ~TI_LinkEnh_atx_thresh_mask; |
| 2505 | link_enh |= TI_LinkEnh_atx_thresh_1_7K; |
| 2506 | |
| 2507 | /* use priority arbitration for asynchronous responses */ |
| 2508 | link_enh |= TI_LinkEnh_enab_unfair; |
| 2509 | |
| 2510 | /* required for aPhyEnhanceEnable to work */ |
| 2511 | link_enh |= TI_LinkEnh_enab_accel; |
| 2512 | |
| 2513 | pci_write_config_dword(dev, PCI_CFG_TI_LinkEnh, link_enh); |
| 2514 | } |
| 2515 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2516 | ar_context_init(&ohci->ar_request_ctx, ohci, |
| 2517 | OHCI1394_AsReqRcvContextControlSet); |
| 2518 | |
| 2519 | ar_context_init(&ohci->ar_response_ctx, ohci, |
| 2520 | OHCI1394_AsRspRcvContextControlSet); |
| 2521 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 2522 | context_init(&ohci->at_request_ctx, ohci, |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 2523 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2524 | |
David Moore | fe5ca63 | 2008-01-06 17:21:41 -0500 | [diff] [blame] | 2525 | context_init(&ohci->at_response_ctx, ohci, |
Kristian Høgsberg | f319b6a | 2007-03-07 12:12:49 -0500 | [diff] [blame] | 2526 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2527 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2528 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
Stefan Richter | 4817ed2 | 2008-12-21 16:39:46 +0100 | [diff] [blame] | 2529 | ohci->ir_context_channels = ~0ULL; |
Stefan Richter | 4802f16 | 2010-02-21 17:58:52 +0100 | [diff] [blame] | 2530 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); |
| 2531 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); |
Stefan Richter | 6fdb2ee | 2010-02-21 17:59:14 +0100 | [diff] [blame] | 2532 | n_ir = hweight32(ohci->ir_context_mask); |
| 2533 | size = sizeof(struct iso_context) * n_ir; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2534 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); |
| 2535 | |
Stefan Richter | 4802f16 | 2010-02-21 17:58:52 +0100 | [diff] [blame] | 2536 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); |
| 2537 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); |
| 2538 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); |
Stefan Richter | 6fdb2ee | 2010-02-21 17:59:14 +0100 | [diff] [blame] | 2539 | n_it = hweight32(ohci->it_context_mask); |
| 2540 | size = sizeof(struct iso_context) * n_it; |
Stefan Richter | 4802f16 | 2010-02-21 17:58:52 +0100 | [diff] [blame] | 2541 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); |
| 2542 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2543 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2544 | err = -ENOMEM; |
Stefan Richter | 7007a07 | 2008-10-26 09:50:31 +0100 | [diff] [blame] | 2545 | goto fail_contexts; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2546 | } |
| 2547 | |
| 2548 | /* self-id dma buffer allocation */ |
| 2549 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, |
| 2550 | SELF_ID_BUF_SIZE, |
| 2551 | &ohci->self_id_bus, |
| 2552 | GFP_KERNEL); |
| 2553 | if (ohci->self_id_cpu == NULL) { |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2554 | err = -ENOMEM; |
Stefan Richter | 7007a07 | 2008-10-26 09:50:31 +0100 | [diff] [blame] | 2555 | goto fail_contexts; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2556 | } |
| 2557 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2558 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
| 2559 | max_receive = (bus_options >> 12) & 0xf; |
| 2560 | link_speed = bus_options & 0x7; |
| 2561 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | |
| 2562 | reg_read(ohci, OHCI1394_GUIDLo); |
| 2563 | |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2564 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 2565 | if (err) |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2566 | goto fail_self_id; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2567 | |
Stefan Richter | 6fdb2ee | 2010-02-21 17:59:14 +0100 | [diff] [blame] | 2568 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
| 2569 | fw_notify("Added fw-ohci device %s, OHCI v%x.%x, " |
| 2570 | "%d IR + %d IT contexts, quirks 0x%x\n", |
| 2571 | dev_name(&dev->dev), version >> 16, version & 0xff, |
| 2572 | n_ir, n_it, ohci->quirks); |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 2573 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2574 | return 0; |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2575 | |
| 2576 | fail_self_id: |
| 2577 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
| 2578 | ohci->self_id_cpu, ohci->self_id_bus); |
Stefan Richter | 7007a07 | 2008-10-26 09:50:31 +0100 | [diff] [blame] | 2579 | fail_contexts: |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2580 | kfree(ohci->ir_context_list); |
Stefan Richter | 7007a07 | 2008-10-26 09:50:31 +0100 | [diff] [blame] | 2581 | kfree(ohci->it_context_list); |
| 2582 | context_release(&ohci->at_response_ctx); |
| 2583 | context_release(&ohci->at_request_ctx); |
| 2584 | ar_context_release(&ohci->ar_response_ctx); |
| 2585 | ar_context_release(&ohci->ar_request_ctx); |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2586 | pci_iounmap(dev, ohci->registers); |
| 2587 | fail_iomem: |
| 2588 | pci_release_region(dev, 0); |
| 2589 | fail_disable: |
| 2590 | pci_disable_device(dev); |
Stefan Richter | bd7dee6 | 2008-02-24 18:59:55 +0100 | [diff] [blame] | 2591 | fail_free: |
| 2592 | kfree(&ohci->card); |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2593 | pmac_ohci_off(dev); |
Stefan Richter | 7007a07 | 2008-10-26 09:50:31 +0100 | [diff] [blame] | 2594 | fail: |
| 2595 | if (err == -ENOMEM) |
| 2596 | fw_error("Out of memory\n"); |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2597 | |
| 2598 | return err; |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2599 | } |
| 2600 | |
| 2601 | static void pci_remove(struct pci_dev *dev) |
| 2602 | { |
| 2603 | struct fw_ohci *ohci; |
| 2604 | |
| 2605 | ohci = pci_get_drvdata(dev); |
Kristian Høgsberg | e254a4b | 2007-03-07 12:12:38 -0500 | [diff] [blame] | 2606 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
| 2607 | flush_writes(ohci); |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2608 | fw_core_remove_card(&ohci->card); |
| 2609 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 2610 | /* |
| 2611 | * FIXME: Fail all pending packets here, now that the upper |
| 2612 | * layers can't queue any more. |
| 2613 | */ |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2614 | |
| 2615 | software_reset(ohci); |
| 2616 | free_irq(dev->irq, ohci); |
Jay Fenlason | a55709b | 2008-10-22 15:59:42 -0400 | [diff] [blame] | 2617 | |
| 2618 | if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom) |
| 2619 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
| 2620 | ohci->next_config_rom, ohci->next_config_rom_bus); |
| 2621 | if (ohci->config_rom) |
| 2622 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
| 2623 | ohci->config_rom, ohci->config_rom_bus); |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2624 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
| 2625 | ohci->self_id_cpu, ohci->self_id_bus); |
Jay Fenlason | a55709b | 2008-10-22 15:59:42 -0400 | [diff] [blame] | 2626 | ar_context_release(&ohci->ar_request_ctx); |
| 2627 | ar_context_release(&ohci->ar_response_ctx); |
| 2628 | context_release(&ohci->at_request_ctx); |
| 2629 | context_release(&ohci->at_response_ctx); |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2630 | kfree(ohci->it_context_list); |
| 2631 | kfree(ohci->ir_context_list); |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 2632 | pci_disable_msi(dev); |
Kristian Høgsberg | d79406d | 2007-05-09 19:23:15 -0400 | [diff] [blame] | 2633 | pci_iounmap(dev, ohci->registers); |
| 2634 | pci_release_region(dev, 0); |
| 2635 | pci_disable_device(dev); |
Stefan Richter | bd7dee6 | 2008-02-24 18:59:55 +0100 | [diff] [blame] | 2636 | kfree(&ohci->card); |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2637 | pmac_ohci_off(dev); |
Stefan Richter | ea8d006 | 2008-03-01 02:42:56 +0100 | [diff] [blame] | 2638 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2639 | fw_notify("Removed fw-ohci device.\n"); |
| 2640 | } |
| 2641 | |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2642 | #ifdef CONFIG_PM |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2643 | static int pci_suspend(struct pci_dev *dev, pm_message_t state) |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2644 | { |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2645 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2646 | int err; |
| 2647 | |
| 2648 | software_reset(ohci); |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2649 | free_irq(dev->irq, ohci); |
Clemens Ladisch | 262444e | 2010-06-05 12:31:25 +0200 | [diff] [blame^] | 2650 | pci_disable_msi(dev); |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2651 | err = pci_save_state(dev); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2652 | if (err) { |
Stefan Richter | 8a8cea2 | 2007-06-09 19:26:22 +0200 | [diff] [blame] | 2653 | fw_error("pci_save_state failed\n"); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2654 | return err; |
| 2655 | } |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2656 | err = pci_set_power_state(dev, pci_choose_state(dev, state)); |
Stefan Richter | 5511142 | 2007-09-06 09:50:30 +0200 | [diff] [blame] | 2657 | if (err) |
| 2658 | fw_error("pci_set_power_state failed with %d\n", err); |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2659 | pmac_ohci_off(dev); |
Stefan Richter | ea8d006 | 2008-03-01 02:42:56 +0100 | [diff] [blame] | 2660 | |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2661 | return 0; |
| 2662 | } |
| 2663 | |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2664 | static int pci_resume(struct pci_dev *dev) |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2665 | { |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2666 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2667 | int err; |
| 2668 | |
Stefan Richter | 5da3dac | 2010-04-02 14:05:02 +0200 | [diff] [blame] | 2669 | pmac_ohci_on(dev); |
Stefan Richter | 2ed0f18 | 2008-03-01 12:35:29 +0100 | [diff] [blame] | 2670 | pci_set_power_state(dev, PCI_D0); |
| 2671 | pci_restore_state(dev); |
| 2672 | err = pci_enable_device(dev); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2673 | if (err) { |
Stefan Richter | 8a8cea2 | 2007-06-09 19:26:22 +0200 | [diff] [blame] | 2674 | fw_error("pci_enable_device failed\n"); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2675 | return err; |
| 2676 | } |
| 2677 | |
Kristian Høgsberg | 0bd243c | 2007-06-05 19:27:05 -0400 | [diff] [blame] | 2678 | return ohci_enable(&ohci->card, NULL, 0); |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2679 | } |
| 2680 | #endif |
| 2681 | |
Németh Márton | a67483d | 2010-01-10 13:14:26 +0100 | [diff] [blame] | 2682 | static const struct pci_device_id pci_table[] = { |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2683 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, |
| 2684 | { } |
| 2685 | }; |
| 2686 | |
| 2687 | MODULE_DEVICE_TABLE(pci, pci_table); |
| 2688 | |
| 2689 | static struct pci_driver fw_ohci_pci_driver = { |
| 2690 | .name = ohci_driver_name, |
| 2691 | .id_table = pci_table, |
| 2692 | .probe = pci_probe, |
| 2693 | .remove = pci_remove, |
Kristian Høgsberg | 2aef469 | 2007-05-30 19:06:35 -0400 | [diff] [blame] | 2694 | #ifdef CONFIG_PM |
| 2695 | .resume = pci_resume, |
| 2696 | .suspend = pci_suspend, |
| 2697 | #endif |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2698 | }; |
| 2699 | |
| 2700 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
| 2701 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); |
| 2702 | MODULE_LICENSE("GPL"); |
| 2703 | |
Olaf Hering | 1e4c7b0 | 2007-05-05 23:17:13 +0200 | [diff] [blame] | 2704 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
| 2705 | #ifndef CONFIG_IEEE1394_OHCI1394_MODULE |
| 2706 | MODULE_ALIAS("ohci1394"); |
| 2707 | #endif |
| 2708 | |
Kristian Høgsberg | ed56891 | 2006-12-19 19:58:35 -0500 | [diff] [blame] | 2709 | static int __init fw_ohci_init(void) |
| 2710 | { |
| 2711 | return pci_register_driver(&fw_ohci_pci_driver); |
| 2712 | } |
| 2713 | |
| 2714 | static void __exit fw_ohci_cleanup(void) |
| 2715 | { |
| 2716 | pci_unregister_driver(&fw_ohci_pci_driver); |
| 2717 | } |
| 2718 | |
| 2719 | module_init(fw_ohci_init); |
| 2720 | module_exit(fw_ohci_cleanup); |