Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * Driver for OHCI 1394 controllers | |
ed568912 | 3 | * |
ed568912 KH |
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 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/poll.h> | |
cf3e72fd | 28 | #include <linux/dma-mapping.h> |
faa2fb4e | 29 | #include <linux/mm.h> |
cf3e72fd | 30 | |
ed568912 KH |
31 | #include <asm/uaccess.h> |
32 | #include <asm/semaphore.h> | |
ee71c2f9 | 33 | #include <asm/system.h> |
ed568912 KH |
34 | |
35 | #include "fw-transaction.h" | |
36 | #include "fw-ohci.h" | |
37 | ||
a77754a7 KH |
38 | #define DESCRIPTOR_OUTPUT_MORE 0 |
39 | #define DESCRIPTOR_OUTPUT_LAST (1 << 12) | |
40 | #define DESCRIPTOR_INPUT_MORE (2 << 12) | |
41 | #define DESCRIPTOR_INPUT_LAST (3 << 12) | |
42 | #define DESCRIPTOR_STATUS (1 << 11) | |
43 | #define DESCRIPTOR_KEY_IMMEDIATE (2 << 8) | |
44 | #define DESCRIPTOR_PING (1 << 7) | |
45 | #define DESCRIPTOR_YY (1 << 6) | |
46 | #define DESCRIPTOR_NO_IRQ (0 << 4) | |
47 | #define DESCRIPTOR_IRQ_ERROR (1 << 4) | |
48 | #define DESCRIPTOR_IRQ_ALWAYS (3 << 4) | |
49 | #define DESCRIPTOR_BRANCH_ALWAYS (3 << 2) | |
50 | #define DESCRIPTOR_WAIT (3 << 0) | |
ed568912 KH |
51 | |
52 | struct descriptor { | |
53 | __le16 req_count; | |
54 | __le16 control; | |
55 | __le32 data_address; | |
56 | __le32 branch_address; | |
57 | __le16 res_count; | |
58 | __le16 transfer_status; | |
59 | } __attribute__((aligned(16))); | |
60 | ||
295e3feb KH |
61 | struct db_descriptor { |
62 | __le16 first_size; | |
63 | __le16 control; | |
64 | __le16 second_req_count; | |
65 | __le16 first_req_count; | |
66 | __le32 branch_address; | |
67 | __le16 second_res_count; | |
68 | __le16 first_res_count; | |
69 | __le32 reserved0; | |
70 | __le32 first_buffer; | |
71 | __le32 second_buffer; | |
72 | __le32 reserved1; | |
73 | } __attribute__((aligned(16))); | |
74 | ||
a77754a7 KH |
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) | |
72e318e0 | 79 | |
32b46093 | 80 | struct ar_buffer { |
ed568912 | 81 | struct descriptor descriptor; |
32b46093 KH |
82 | struct ar_buffer *next; |
83 | __le32 data[0]; | |
84 | }; | |
ed568912 | 85 | |
32b46093 KH |
86 | struct ar_context { |
87 | struct fw_ohci *ohci; | |
88 | struct ar_buffer *current_buffer; | |
89 | struct ar_buffer *last_buffer; | |
90 | void *pointer; | |
72e318e0 | 91 | u32 regs; |
ed568912 KH |
92 | struct tasklet_struct tasklet; |
93 | }; | |
94 | ||
30200739 KH |
95 | struct context; |
96 | ||
97 | typedef int (*descriptor_callback_t)(struct context *ctx, | |
98 | struct descriptor *d, | |
99 | struct descriptor *last); | |
100 | struct context { | |
373b2edd | 101 | struct fw_ohci *ohci; |
30200739 | 102 | u32 regs; |
373b2edd | 103 | |
30200739 KH |
104 | struct descriptor *buffer; |
105 | dma_addr_t buffer_bus; | |
106 | size_t buffer_size; | |
107 | struct descriptor *head_descriptor; | |
108 | struct descriptor *tail_descriptor; | |
109 | struct descriptor *tail_descriptor_last; | |
110 | struct descriptor *prev_descriptor; | |
111 | ||
112 | descriptor_callback_t callback; | |
113 | ||
373b2edd | 114 | struct tasklet_struct tasklet; |
30200739 | 115 | }; |
30200739 | 116 | |
a77754a7 KH |
117 | #define IT_HEADER_SY(v) ((v) << 0) |
118 | #define IT_HEADER_TCODE(v) ((v) << 4) | |
119 | #define IT_HEADER_CHANNEL(v) ((v) << 8) | |
120 | #define IT_HEADER_TAG(v) ((v) << 14) | |
121 | #define IT_HEADER_SPEED(v) ((v) << 16) | |
122 | #define IT_HEADER_DATA_LENGTH(v) ((v) << 16) | |
ed568912 KH |
123 | |
124 | struct iso_context { | |
125 | struct fw_iso_context base; | |
30200739 | 126 | struct context context; |
9b32d5f3 KH |
127 | void *header; |
128 | size_t header_length; | |
ed568912 KH |
129 | }; |
130 | ||
131 | #define CONFIG_ROM_SIZE 1024 | |
132 | ||
133 | struct fw_ohci { | |
134 | struct fw_card card; | |
135 | ||
e364cf4e | 136 | u32 version; |
ed568912 KH |
137 | __iomem char *registers; |
138 | dma_addr_t self_id_bus; | |
139 | __le32 *self_id_cpu; | |
140 | struct tasklet_struct bus_reset_tasklet; | |
e636fe25 | 141 | int node_id; |
ed568912 KH |
142 | int generation; |
143 | int request_generation; | |
d60d7f1d | 144 | u32 bus_seconds; |
ed568912 | 145 | |
c781c06d KH |
146 | /* |
147 | * Spinlock for accessing fw_ohci data. Never call out of | |
148 | * this driver with this lock held. | |
149 | */ | |
ed568912 KH |
150 | spinlock_t lock; |
151 | u32 self_id_buffer[512]; | |
152 | ||
153 | /* Config rom buffers */ | |
154 | __be32 *config_rom; | |
155 | dma_addr_t config_rom_bus; | |
156 | __be32 *next_config_rom; | |
157 | dma_addr_t next_config_rom_bus; | |
158 | u32 next_header; | |
159 | ||
160 | struct ar_context ar_request_ctx; | |
161 | struct ar_context ar_response_ctx; | |
f319b6a0 KH |
162 | struct context at_request_ctx; |
163 | struct context at_response_ctx; | |
ed568912 KH |
164 | |
165 | u32 it_context_mask; | |
166 | struct iso_context *it_context_list; | |
167 | u32 ir_context_mask; | |
168 | struct iso_context *ir_context_list; | |
169 | }; | |
170 | ||
95688e97 | 171 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
ed568912 KH |
172 | { |
173 | return container_of(card, struct fw_ohci, card); | |
174 | } | |
175 | ||
295e3feb KH |
176 | #define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 |
177 | #define IR_CONTEXT_BUFFER_FILL 0x80000000 | |
178 | #define IR_CONTEXT_ISOCH_HEADER 0x40000000 | |
179 | #define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000 | |
180 | #define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000 | |
181 | #define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000 | |
ed568912 KH |
182 | |
183 | #define CONTEXT_RUN 0x8000 | |
184 | #define CONTEXT_WAKE 0x1000 | |
185 | #define CONTEXT_DEAD 0x0800 | |
186 | #define CONTEXT_ACTIVE 0x0400 | |
187 | ||
188 | #define OHCI1394_MAX_AT_REQ_RETRIES 0x2 | |
189 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 | |
190 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 | |
191 | ||
192 | #define FW_OHCI_MAJOR 240 | |
193 | #define OHCI1394_REGISTER_SIZE 0x800 | |
194 | #define OHCI_LOOP_COUNT 500 | |
195 | #define OHCI1394_PCI_HCI_Control 0x40 | |
196 | #define SELF_ID_BUF_SIZE 0x800 | |
32b46093 | 197 | #define OHCI_TCODE_PHY_PACKET 0x0e |
e364cf4e | 198 | #define OHCI_VERSION_1_1 0x010010 |
f319b6a0 KH |
199 | #define ISO_BUFFER_SIZE (64 * 1024) |
200 | #define AT_BUFFER_SIZE 4096 | |
0edeefd9 | 201 | |
ed568912 KH |
202 | static char ohci_driver_name[] = KBUILD_MODNAME; |
203 | ||
95688e97 | 204 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
ed568912 KH |
205 | { |
206 | writel(data, ohci->registers + offset); | |
207 | } | |
208 | ||
95688e97 | 209 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
ed568912 KH |
210 | { |
211 | return readl(ohci->registers + offset); | |
212 | } | |
213 | ||
95688e97 | 214 | static inline void flush_writes(const struct fw_ohci *ohci) |
ed568912 KH |
215 | { |
216 | /* Do a dummy read to flush writes. */ | |
217 | reg_read(ohci, OHCI1394_Version); | |
218 | } | |
219 | ||
220 | static int | |
221 | ohci_update_phy_reg(struct fw_card *card, int addr, | |
222 | int clear_bits, int set_bits) | |
223 | { | |
224 | struct fw_ohci *ohci = fw_ohci(card); | |
225 | u32 val, old; | |
226 | ||
227 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); | |
362e901c | 228 | flush_writes(ohci); |
ed568912 KH |
229 | msleep(2); |
230 | val = reg_read(ohci, OHCI1394_PhyControl); | |
231 | if ((val & OHCI1394_PhyControl_ReadDone) == 0) { | |
232 | fw_error("failed to set phy reg bits.\n"); | |
233 | return -EBUSY; | |
234 | } | |
235 | ||
236 | old = OHCI1394_PhyControl_ReadData(val); | |
237 | old = (old & ~clear_bits) | set_bits; | |
238 | reg_write(ohci, OHCI1394_PhyControl, | |
239 | OHCI1394_PhyControl_Write(addr, old)); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
32b46093 | 244 | static int ar_context_add_page(struct ar_context *ctx) |
ed568912 | 245 | { |
32b46093 KH |
246 | struct device *dev = ctx->ohci->card.device; |
247 | struct ar_buffer *ab; | |
248 | dma_addr_t ab_bus; | |
249 | size_t offset; | |
250 | ||
251 | ab = (struct ar_buffer *) __get_free_page(GFP_ATOMIC); | |
252 | if (ab == NULL) | |
253 | return -ENOMEM; | |
254 | ||
255 | ab_bus = dma_map_single(dev, ab, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
256 | if (dma_mapping_error(ab_bus)) { | |
257 | free_page((unsigned long) ab); | |
258 | return -ENOMEM; | |
259 | } | |
260 | ||
2d826cc5 | 261 | memset(&ab->descriptor, 0, sizeof(ab->descriptor)); |
a77754a7 KH |
262 | ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | |
263 | DESCRIPTOR_STATUS | | |
264 | DESCRIPTOR_BRANCH_ALWAYS); | |
32b46093 KH |
265 | offset = offsetof(struct ar_buffer, data); |
266 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); | |
267 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); | |
268 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); | |
269 | ab->descriptor.branch_address = 0; | |
270 | ||
271 | dma_sync_single_for_device(dev, ab_bus, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
272 | ||
ec839e43 | 273 | ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1); |
32b46093 KH |
274 | ctx->last_buffer->next = ab; |
275 | ctx->last_buffer = ab; | |
276 | ||
a77754a7 | 277 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
ed568912 | 278 | flush_writes(ctx->ohci); |
32b46093 KH |
279 | |
280 | return 0; | |
ed568912 KH |
281 | } |
282 | ||
32b46093 | 283 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 284 | { |
ed568912 | 285 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
286 | struct fw_packet p; |
287 | u32 status, length, tcode; | |
2639a6fb | 288 | |
32b46093 KH |
289 | p.header[0] = le32_to_cpu(buffer[0]); |
290 | p.header[1] = le32_to_cpu(buffer[1]); | |
291 | p.header[2] = le32_to_cpu(buffer[2]); | |
2639a6fb KH |
292 | |
293 | tcode = (p.header[0] >> 4) & 0x0f; | |
294 | switch (tcode) { | |
295 | case TCODE_WRITE_QUADLET_REQUEST: | |
296 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 297 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 298 | p.header_length = 16; |
32b46093 | 299 | p.payload_length = 0; |
2639a6fb KH |
300 | break; |
301 | ||
2639a6fb | 302 | case TCODE_READ_BLOCK_REQUEST : |
32b46093 KH |
303 | p.header[3] = le32_to_cpu(buffer[3]); |
304 | p.header_length = 16; | |
305 | p.payload_length = 0; | |
306 | break; | |
307 | ||
308 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
309 | case TCODE_READ_BLOCK_RESPONSE: |
310 | case TCODE_LOCK_REQUEST: | |
311 | case TCODE_LOCK_RESPONSE: | |
32b46093 | 312 | p.header[3] = le32_to_cpu(buffer[3]); |
2639a6fb | 313 | p.header_length = 16; |
32b46093 | 314 | p.payload_length = p.header[3] >> 16; |
2639a6fb KH |
315 | break; |
316 | ||
317 | case TCODE_WRITE_RESPONSE: | |
318 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 319 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 320 | p.header_length = 12; |
32b46093 | 321 | p.payload_length = 0; |
2639a6fb KH |
322 | break; |
323 | } | |
ed568912 | 324 | |
32b46093 KH |
325 | p.payload = (void *) buffer + p.header_length; |
326 | ||
327 | /* FIXME: What to do about evt_* errors? */ | |
328 | length = (p.header_length + p.payload_length + 3) / 4; | |
329 | status = le32_to_cpu(buffer[length]); | |
330 | ||
331 | p.ack = ((status >> 16) & 0x1f) - 16; | |
332 | p.speed = (status >> 21) & 0x7; | |
333 | p.timestamp = status & 0xffff; | |
334 | p.generation = ohci->request_generation; | |
ed568912 | 335 | |
c781c06d KH |
336 | /* |
337 | * The OHCI bus reset handler synthesizes a phy packet with | |
ed568912 KH |
338 | * the new generation number when a bus reset happens (see |
339 | * section 8.4.2.3). This helps us determine when a request | |
340 | * was received and make sure we send the response in the same | |
341 | * generation. We only need this for requests; for responses | |
342 | * we use the unique tlabel for finding the matching | |
c781c06d KH |
343 | * request. |
344 | */ | |
ed568912 | 345 | |
2639a6fb | 346 | if (p.ack + 16 == 0x09) |
32b46093 | 347 | ohci->request_generation = (buffer[2] >> 16) & 0xff; |
ed568912 | 348 | else if (ctx == &ohci->ar_request_ctx) |
2639a6fb | 349 | fw_core_handle_request(&ohci->card, &p); |
ed568912 | 350 | else |
2639a6fb | 351 | fw_core_handle_response(&ohci->card, &p); |
ed568912 | 352 | |
32b46093 KH |
353 | return buffer + length + 1; |
354 | } | |
ed568912 | 355 | |
32b46093 KH |
356 | static void ar_context_tasklet(unsigned long data) |
357 | { | |
358 | struct ar_context *ctx = (struct ar_context *)data; | |
359 | struct fw_ohci *ohci = ctx->ohci; | |
360 | struct ar_buffer *ab; | |
361 | struct descriptor *d; | |
362 | void *buffer, *end; | |
363 | ||
364 | ab = ctx->current_buffer; | |
365 | d = &ab->descriptor; | |
366 | ||
367 | if (d->res_count == 0) { | |
368 | size_t size, rest, offset; | |
369 | ||
c781c06d KH |
370 | /* |
371 | * This descriptor is finished and we may have a | |
32b46093 | 372 | * packet split across this and the next buffer. We |
c781c06d KH |
373 | * reuse the page for reassembling the split packet. |
374 | */ | |
32b46093 KH |
375 | |
376 | offset = offsetof(struct ar_buffer, data); | |
377 | dma_unmap_single(ohci->card.device, | |
0a9972ba SR |
378 | le32_to_cpu(ab->descriptor.data_address) - offset, |
379 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
32b46093 KH |
380 | |
381 | buffer = ab; | |
382 | ab = ab->next; | |
383 | d = &ab->descriptor; | |
384 | size = buffer + PAGE_SIZE - ctx->pointer; | |
385 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); | |
386 | memmove(buffer, ctx->pointer, size); | |
387 | memcpy(buffer + size, ab->data, rest); | |
388 | ctx->current_buffer = ab; | |
389 | ctx->pointer = (void *) ab->data + rest; | |
390 | end = buffer + size + rest; | |
391 | ||
392 | while (buffer < end) | |
393 | buffer = handle_ar_packet(ctx, buffer); | |
394 | ||
395 | free_page((unsigned long)buffer); | |
396 | ar_context_add_page(ctx); | |
397 | } else { | |
398 | buffer = ctx->pointer; | |
399 | ctx->pointer = end = | |
400 | (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); | |
401 | ||
402 | while (buffer < end) | |
403 | buffer = handle_ar_packet(ctx, buffer); | |
404 | } | |
ed568912 KH |
405 | } |
406 | ||
407 | static int | |
72e318e0 | 408 | ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 regs) |
ed568912 | 409 | { |
32b46093 | 410 | struct ar_buffer ab; |
ed568912 | 411 | |
72e318e0 KH |
412 | ctx->regs = regs; |
413 | ctx->ohci = ohci; | |
414 | ctx->last_buffer = &ab; | |
ed568912 KH |
415 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
416 | ||
32b46093 KH |
417 | ar_context_add_page(ctx); |
418 | ar_context_add_page(ctx); | |
419 | ctx->current_buffer = ab.next; | |
420 | ctx->pointer = ctx->current_buffer->data; | |
421 | ||
2aef469a KH |
422 | return 0; |
423 | } | |
424 | ||
425 | static void ar_context_run(struct ar_context *ctx) | |
426 | { | |
427 | struct ar_buffer *ab = ctx->current_buffer; | |
428 | dma_addr_t ab_bus; | |
429 | size_t offset; | |
430 | ||
431 | offset = offsetof(struct ar_buffer, data); | |
0a9972ba | 432 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
2aef469a KH |
433 | |
434 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1); | |
a77754a7 | 435 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
32b46093 | 436 | flush_writes(ctx->ohci); |
ed568912 | 437 | } |
373b2edd | 438 | |
30200739 KH |
439 | static void context_tasklet(unsigned long data) |
440 | { | |
441 | struct context *ctx = (struct context *) data; | |
442 | struct fw_ohci *ohci = ctx->ohci; | |
443 | struct descriptor *d, *last; | |
444 | u32 address; | |
445 | int z; | |
446 | ||
447 | dma_sync_single_for_cpu(ohci->card.device, ctx->buffer_bus, | |
448 | ctx->buffer_size, DMA_TO_DEVICE); | |
449 | ||
450 | d = ctx->tail_descriptor; | |
451 | last = ctx->tail_descriptor_last; | |
452 | ||
453 | while (last->branch_address != 0) { | |
454 | address = le32_to_cpu(last->branch_address); | |
455 | z = address & 0xf; | |
2d826cc5 | 456 | d = ctx->buffer + (address - ctx->buffer_bus) / sizeof(*d); |
30200739 KH |
457 | last = (z == 2) ? d : d + z - 1; |
458 | ||
459 | if (!ctx->callback(ctx, d, last)) | |
460 | break; | |
461 | ||
462 | ctx->tail_descriptor = d; | |
463 | ctx->tail_descriptor_last = last; | |
464 | } | |
465 | } | |
466 | ||
467 | static int | |
468 | context_init(struct context *ctx, struct fw_ohci *ohci, | |
469 | size_t buffer_size, u32 regs, | |
470 | descriptor_callback_t callback) | |
471 | { | |
472 | ctx->ohci = ohci; | |
473 | ctx->regs = regs; | |
474 | ctx->buffer_size = buffer_size; | |
475 | ctx->buffer = kmalloc(buffer_size, GFP_KERNEL); | |
476 | if (ctx->buffer == NULL) | |
477 | return -ENOMEM; | |
478 | ||
479 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); | |
480 | ctx->callback = callback; | |
481 | ||
482 | ctx->buffer_bus = | |
483 | dma_map_single(ohci->card.device, ctx->buffer, | |
484 | buffer_size, DMA_TO_DEVICE); | |
485 | if (dma_mapping_error(ctx->buffer_bus)) { | |
486 | kfree(ctx->buffer); | |
487 | return -ENOMEM; | |
488 | } | |
489 | ||
490 | ctx->head_descriptor = ctx->buffer; | |
491 | ctx->prev_descriptor = ctx->buffer; | |
492 | ctx->tail_descriptor = ctx->buffer; | |
493 | ctx->tail_descriptor_last = ctx->buffer; | |
494 | ||
c781c06d KH |
495 | /* |
496 | * We put a dummy descriptor in the buffer that has a NULL | |
30200739 KH |
497 | * branch address and looks like it's been sent. That way we |
498 | * have a descriptor to append DMA programs to. Also, the | |
499 | * ring buffer invariant is that it always has at least one | |
c781c06d KH |
500 | * element so that head == tail means buffer full. |
501 | */ | |
30200739 | 502 | |
2d826cc5 | 503 | memset(ctx->head_descriptor, 0, sizeof(*ctx->head_descriptor)); |
a77754a7 | 504 | ctx->head_descriptor->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); |
30200739 KH |
505 | ctx->head_descriptor->transfer_status = cpu_to_le16(0x8011); |
506 | ctx->head_descriptor++; | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
9b32d5f3 | 511 | static void |
30200739 KH |
512 | context_release(struct context *ctx) |
513 | { | |
514 | struct fw_card *card = &ctx->ohci->card; | |
515 | ||
516 | dma_unmap_single(card->device, ctx->buffer_bus, | |
517 | ctx->buffer_size, DMA_TO_DEVICE); | |
518 | kfree(ctx->buffer); | |
519 | } | |
520 | ||
521 | static struct descriptor * | |
522 | context_get_descriptors(struct context *ctx, int z, dma_addr_t *d_bus) | |
523 | { | |
524 | struct descriptor *d, *tail, *end; | |
525 | ||
526 | d = ctx->head_descriptor; | |
527 | tail = ctx->tail_descriptor; | |
2d826cc5 | 528 | end = ctx->buffer + ctx->buffer_size / sizeof(*d); |
30200739 KH |
529 | |
530 | if (d + z <= tail) { | |
531 | goto has_space; | |
532 | } else if (d > tail && d + z <= end) { | |
533 | goto has_space; | |
534 | } else if (d > tail && ctx->buffer + z <= tail) { | |
535 | d = ctx->buffer; | |
536 | goto has_space; | |
537 | } | |
538 | ||
539 | return NULL; | |
540 | ||
541 | has_space: | |
2d826cc5 KH |
542 | memset(d, 0, z * sizeof(*d)); |
543 | *d_bus = ctx->buffer_bus + (d - ctx->buffer) * sizeof(*d); | |
30200739 KH |
544 | |
545 | return d; | |
546 | } | |
547 | ||
295e3feb | 548 | static void context_run(struct context *ctx, u32 extra) |
30200739 KH |
549 | { |
550 | struct fw_ohci *ohci = ctx->ohci; | |
551 | ||
a77754a7 | 552 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
30200739 | 553 | le32_to_cpu(ctx->tail_descriptor_last->branch_address)); |
a77754a7 KH |
554 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
555 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); | |
30200739 KH |
556 | flush_writes(ohci); |
557 | } | |
558 | ||
559 | static void context_append(struct context *ctx, | |
560 | struct descriptor *d, int z, int extra) | |
561 | { | |
562 | dma_addr_t d_bus; | |
563 | ||
2d826cc5 | 564 | d_bus = ctx->buffer_bus + (d - ctx->buffer) * sizeof(*d); |
30200739 KH |
565 | |
566 | ctx->head_descriptor = d + z + extra; | |
567 | ctx->prev_descriptor->branch_address = cpu_to_le32(d_bus | z); | |
568 | ctx->prev_descriptor = z == 2 ? d : d + z - 1; | |
569 | ||
570 | dma_sync_single_for_device(ctx->ohci->card.device, ctx->buffer_bus, | |
571 | ctx->buffer_size, DMA_TO_DEVICE); | |
572 | ||
a77754a7 | 573 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
30200739 KH |
574 | flush_writes(ctx->ohci); |
575 | } | |
576 | ||
577 | static void context_stop(struct context *ctx) | |
578 | { | |
579 | u32 reg; | |
b8295668 | 580 | int i; |
30200739 | 581 | |
a77754a7 | 582 | reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
b8295668 | 583 | flush_writes(ctx->ohci); |
30200739 | 584 | |
b8295668 | 585 | for (i = 0; i < 10; i++) { |
a77754a7 | 586 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
b8295668 KH |
587 | if ((reg & CONTEXT_ACTIVE) == 0) |
588 | break; | |
589 | ||
590 | fw_notify("context_stop: still active (0x%08x)\n", reg); | |
b980f5a2 | 591 | mdelay(1); |
b8295668 | 592 | } |
30200739 | 593 | } |
ed568912 | 594 | |
f319b6a0 KH |
595 | struct driver_data { |
596 | struct fw_packet *packet; | |
597 | }; | |
ed568912 | 598 | |
c781c06d KH |
599 | /* |
600 | * This function apppends a packet to the DMA queue for transmission. | |
f319b6a0 | 601 | * Must always be called with the ochi->lock held to ensure proper |
c781c06d KH |
602 | * generation handling and locking around packet queue manipulation. |
603 | */ | |
f319b6a0 KH |
604 | static int |
605 | at_context_queue_packet(struct context *ctx, struct fw_packet *packet) | |
ed568912 | 606 | { |
ed568912 | 607 | struct fw_ohci *ohci = ctx->ohci; |
f319b6a0 KH |
608 | dma_addr_t d_bus, payload_bus; |
609 | struct driver_data *driver_data; | |
610 | struct descriptor *d, *last; | |
611 | __le32 *header; | |
ed568912 | 612 | int z, tcode; |
f319b6a0 | 613 | u32 reg; |
ed568912 | 614 | |
f319b6a0 KH |
615 | d = context_get_descriptors(ctx, 4, &d_bus); |
616 | if (d == NULL) { | |
617 | packet->ack = RCODE_SEND_ERROR; | |
618 | return -1; | |
ed568912 KH |
619 | } |
620 | ||
a77754a7 | 621 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
f319b6a0 KH |
622 | d[0].res_count = cpu_to_le16(packet->timestamp); |
623 | ||
c781c06d KH |
624 | /* |
625 | * The DMA format for asyncronous link packets is different | |
ed568912 KH |
626 | * from the IEEE1394 layout, so shift the fields around |
627 | * accordingly. If header_length is 8, it's a PHY packet, to | |
c781c06d KH |
628 | * which we need to prepend an extra quadlet. |
629 | */ | |
f319b6a0 KH |
630 | |
631 | header = (__le32 *) &d[1]; | |
ed568912 | 632 | if (packet->header_length > 8) { |
f319b6a0 KH |
633 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
634 | (packet->speed << 16)); | |
635 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
636 | (packet->header[0] & 0xffff0000)); | |
637 | header[2] = cpu_to_le32(packet->header[2]); | |
ed568912 KH |
638 | |
639 | tcode = (packet->header[0] >> 4) & 0x0f; | |
640 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
f319b6a0 | 641 | header[3] = cpu_to_le32(packet->header[3]); |
ed568912 | 642 | else |
f319b6a0 KH |
643 | header[3] = (__force __le32) packet->header[3]; |
644 | ||
645 | d[0].req_count = cpu_to_le16(packet->header_length); | |
ed568912 | 646 | } else { |
f319b6a0 KH |
647 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
648 | (packet->speed << 16)); | |
649 | header[1] = cpu_to_le32(packet->header[0]); | |
650 | header[2] = cpu_to_le32(packet->header[1]); | |
651 | d[0].req_count = cpu_to_le16(12); | |
ed568912 KH |
652 | } |
653 | ||
f319b6a0 KH |
654 | driver_data = (struct driver_data *) &d[3]; |
655 | driver_data->packet = packet; | |
20d11673 | 656 | packet->driver_data = driver_data; |
f319b6a0 KH |
657 | |
658 | if (packet->payload_length > 0) { | |
659 | payload_bus = | |
660 | dma_map_single(ohci->card.device, packet->payload, | |
661 | packet->payload_length, DMA_TO_DEVICE); | |
662 | if (dma_mapping_error(payload_bus)) { | |
663 | packet->ack = RCODE_SEND_ERROR; | |
664 | return -1; | |
665 | } | |
666 | ||
667 | d[2].req_count = cpu_to_le16(packet->payload_length); | |
668 | d[2].data_address = cpu_to_le32(payload_bus); | |
669 | last = &d[2]; | |
670 | z = 3; | |
ed568912 | 671 | } else { |
f319b6a0 KH |
672 | last = &d[0]; |
673 | z = 2; | |
ed568912 | 674 | } |
ed568912 | 675 | |
a77754a7 KH |
676 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
677 | DESCRIPTOR_IRQ_ALWAYS | | |
678 | DESCRIPTOR_BRANCH_ALWAYS); | |
ed568912 | 679 | |
f319b6a0 KH |
680 | /* FIXME: Document how the locking works. */ |
681 | if (ohci->generation != packet->generation) { | |
682 | packet->ack = RCODE_GENERATION; | |
683 | return -1; | |
684 | } | |
685 | ||
686 | context_append(ctx, d, z, 4 - z); | |
ed568912 | 687 | |
f319b6a0 | 688 | /* If the context isn't already running, start it up. */ |
a77754a7 | 689 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
053b3080 | 690 | if ((reg & CONTEXT_RUN) == 0) |
f319b6a0 KH |
691 | context_run(ctx, 0); |
692 | ||
693 | return 0; | |
ed568912 KH |
694 | } |
695 | ||
f319b6a0 KH |
696 | static int handle_at_packet(struct context *context, |
697 | struct descriptor *d, | |
698 | struct descriptor *last) | |
ed568912 | 699 | { |
f319b6a0 | 700 | struct driver_data *driver_data; |
ed568912 | 701 | struct fw_packet *packet; |
f319b6a0 KH |
702 | struct fw_ohci *ohci = context->ohci; |
703 | dma_addr_t payload_bus; | |
ed568912 KH |
704 | int evt; |
705 | ||
f319b6a0 KH |
706 | if (last->transfer_status == 0) |
707 | /* This descriptor isn't done yet, stop iteration. */ | |
708 | return 0; | |
ed568912 | 709 | |
f319b6a0 KH |
710 | driver_data = (struct driver_data *) &d[3]; |
711 | packet = driver_data->packet; | |
712 | if (packet == NULL) | |
713 | /* This packet was cancelled, just continue. */ | |
714 | return 1; | |
730c32f5 | 715 | |
f319b6a0 KH |
716 | payload_bus = le32_to_cpu(last->data_address); |
717 | if (payload_bus != 0) | |
718 | dma_unmap_single(ohci->card.device, payload_bus, | |
ed568912 | 719 | packet->payload_length, DMA_TO_DEVICE); |
ed568912 | 720 | |
f319b6a0 KH |
721 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
722 | packet->timestamp = le16_to_cpu(last->res_count); | |
ed568912 | 723 | |
f319b6a0 KH |
724 | switch (evt) { |
725 | case OHCI1394_evt_timeout: | |
726 | /* Async response transmit timed out. */ | |
727 | packet->ack = RCODE_CANCELLED; | |
728 | break; | |
ed568912 | 729 | |
f319b6a0 | 730 | case OHCI1394_evt_flushed: |
c781c06d KH |
731 | /* |
732 | * The packet was flushed should give same error as | |
733 | * when we try to use a stale generation count. | |
734 | */ | |
f319b6a0 KH |
735 | packet->ack = RCODE_GENERATION; |
736 | break; | |
ed568912 | 737 | |
f319b6a0 | 738 | case OHCI1394_evt_missing_ack: |
c781c06d KH |
739 | /* |
740 | * Using a valid (current) generation count, but the | |
741 | * node is not on the bus or not sending acks. | |
742 | */ | |
f319b6a0 KH |
743 | packet->ack = RCODE_NO_ACK; |
744 | break; | |
ed568912 | 745 | |
f319b6a0 KH |
746 | case ACK_COMPLETE + 0x10: |
747 | case ACK_PENDING + 0x10: | |
748 | case ACK_BUSY_X + 0x10: | |
749 | case ACK_BUSY_A + 0x10: | |
750 | case ACK_BUSY_B + 0x10: | |
751 | case ACK_DATA_ERROR + 0x10: | |
752 | case ACK_TYPE_ERROR + 0x10: | |
753 | packet->ack = evt - 0x10; | |
754 | break; | |
ed568912 | 755 | |
f319b6a0 KH |
756 | default: |
757 | packet->ack = RCODE_SEND_ERROR; | |
758 | break; | |
759 | } | |
ed568912 | 760 | |
f319b6a0 | 761 | packet->callback(packet, &ohci->card, packet->ack); |
ed568912 | 762 | |
f319b6a0 | 763 | return 1; |
ed568912 KH |
764 | } |
765 | ||
a77754a7 KH |
766 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
767 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
768 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
769 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
770 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
93c4cceb KH |
771 | |
772 | static void | |
773 | handle_local_rom(struct fw_ohci *ohci, struct fw_packet *packet, u32 csr) | |
774 | { | |
775 | struct fw_packet response; | |
776 | int tcode, length, i; | |
777 | ||
a77754a7 | 778 | tcode = HEADER_GET_TCODE(packet->header[0]); |
93c4cceb | 779 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
a77754a7 | 780 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
93c4cceb KH |
781 | else |
782 | length = 4; | |
783 | ||
784 | i = csr - CSR_CONFIG_ROM; | |
785 | if (i + length > CONFIG_ROM_SIZE) { | |
786 | fw_fill_response(&response, packet->header, | |
787 | RCODE_ADDRESS_ERROR, NULL, 0); | |
788 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
789 | fw_fill_response(&response, packet->header, | |
790 | RCODE_TYPE_ERROR, NULL, 0); | |
791 | } else { | |
792 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
793 | (void *) ohci->config_rom + i, length); | |
794 | } | |
795 | ||
796 | fw_core_handle_response(&ohci->card, &response); | |
797 | } | |
798 | ||
799 | static void | |
800 | handle_local_lock(struct fw_ohci *ohci, struct fw_packet *packet, u32 csr) | |
801 | { | |
802 | struct fw_packet response; | |
803 | int tcode, length, ext_tcode, sel; | |
804 | __be32 *payload, lock_old; | |
805 | u32 lock_arg, lock_data; | |
806 | ||
a77754a7 KH |
807 | tcode = HEADER_GET_TCODE(packet->header[0]); |
808 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); | |
93c4cceb | 809 | payload = packet->payload; |
a77754a7 | 810 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
93c4cceb KH |
811 | |
812 | if (tcode == TCODE_LOCK_REQUEST && | |
813 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
814 | lock_arg = be32_to_cpu(payload[0]); | |
815 | lock_data = be32_to_cpu(payload[1]); | |
816 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
817 | lock_arg = 0; | |
818 | lock_data = 0; | |
819 | } else { | |
820 | fw_fill_response(&response, packet->header, | |
821 | RCODE_TYPE_ERROR, NULL, 0); | |
822 | goto out; | |
823 | } | |
824 | ||
825 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
826 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
827 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
828 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
829 | ||
830 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) | |
831 | lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData)); | |
832 | else | |
833 | fw_notify("swap not done yet\n"); | |
834 | ||
835 | fw_fill_response(&response, packet->header, | |
2d826cc5 | 836 | RCODE_COMPLETE, &lock_old, sizeof(lock_old)); |
93c4cceb KH |
837 | out: |
838 | fw_core_handle_response(&ohci->card, &response); | |
839 | } | |
840 | ||
841 | static void | |
f319b6a0 | 842 | handle_local_request(struct context *ctx, struct fw_packet *packet) |
93c4cceb KH |
843 | { |
844 | u64 offset; | |
845 | u32 csr; | |
846 | ||
473d28c7 KH |
847 | if (ctx == &ctx->ohci->at_request_ctx) { |
848 | packet->ack = ACK_PENDING; | |
849 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
850 | } | |
93c4cceb KH |
851 | |
852 | offset = | |
853 | ((unsigned long long) | |
a77754a7 | 854 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
93c4cceb KH |
855 | packet->header[2]; |
856 | csr = offset - CSR_REGISTER_BASE; | |
857 | ||
858 | /* Handle config rom reads. */ | |
859 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
860 | handle_local_rom(ctx->ohci, packet, csr); | |
861 | else switch (csr) { | |
862 | case CSR_BUS_MANAGER_ID: | |
863 | case CSR_BANDWIDTH_AVAILABLE: | |
864 | case CSR_CHANNELS_AVAILABLE_HI: | |
865 | case CSR_CHANNELS_AVAILABLE_LO: | |
866 | handle_local_lock(ctx->ohci, packet, csr); | |
867 | break; | |
868 | default: | |
869 | if (ctx == &ctx->ohci->at_request_ctx) | |
870 | fw_core_handle_request(&ctx->ohci->card, packet); | |
871 | else | |
872 | fw_core_handle_response(&ctx->ohci->card, packet); | |
873 | break; | |
874 | } | |
473d28c7 KH |
875 | |
876 | if (ctx == &ctx->ohci->at_response_ctx) { | |
877 | packet->ack = ACK_COMPLETE; | |
878 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
879 | } | |
93c4cceb | 880 | } |
e636fe25 | 881 | |
ed568912 | 882 | static void |
f319b6a0 | 883 | at_context_transmit(struct context *ctx, struct fw_packet *packet) |
ed568912 | 884 | { |
ed568912 | 885 | unsigned long flags; |
f319b6a0 | 886 | int retval; |
ed568912 KH |
887 | |
888 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
889 | ||
a77754a7 | 890 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
e636fe25 | 891 | ctx->ohci->generation == packet->generation) { |
93c4cceb KH |
892 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
893 | handle_local_request(ctx, packet); | |
894 | return; | |
e636fe25 | 895 | } |
ed568912 | 896 | |
f319b6a0 | 897 | retval = at_context_queue_packet(ctx, packet); |
ed568912 KH |
898 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
899 | ||
f319b6a0 KH |
900 | if (retval < 0) |
901 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
902 | ||
ed568912 KH |
903 | } |
904 | ||
905 | static void bus_reset_tasklet(unsigned long data) | |
906 | { | |
907 | struct fw_ohci *ohci = (struct fw_ohci *)data; | |
e636fe25 | 908 | int self_id_count, i, j, reg; |
ed568912 KH |
909 | int generation, new_generation; |
910 | unsigned long flags; | |
4eaff7d6 SR |
911 | void *free_rom = NULL; |
912 | dma_addr_t free_rom_bus = 0; | |
ed568912 KH |
913 | |
914 | reg = reg_read(ohci, OHCI1394_NodeID); | |
915 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
916 | fw_error("node ID not valid, new bus reset in progress\n"); | |
917 | return; | |
918 | } | |
e636fe25 | 919 | ohci->node_id = reg & 0xffff; |
ed568912 | 920 | |
c781c06d KH |
921 | /* |
922 | * The count in the SelfIDCount register is the number of | |
ed568912 KH |
923 | * bytes in the self ID receive buffer. Since we also receive |
924 | * the inverted quadlets and a header quadlet, we shift one | |
c781c06d KH |
925 | * bit extra to get the actual number of self IDs. |
926 | */ | |
ed568912 KH |
927 | |
928 | self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff; | |
929 | generation = (le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; | |
ee71c2f9 | 930 | rmb(); |
ed568912 KH |
931 | |
932 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
933 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) | |
934 | fw_error("inconsistent self IDs\n"); | |
935 | ohci->self_id_buffer[j] = le32_to_cpu(ohci->self_id_cpu[i]); | |
936 | } | |
ee71c2f9 | 937 | rmb(); |
ed568912 | 938 | |
c781c06d KH |
939 | /* |
940 | * Check the consistency of the self IDs we just read. The | |
ed568912 KH |
941 | * problem we face is that a new bus reset can start while we |
942 | * read out the self IDs from the DMA buffer. If this happens, | |
943 | * the DMA buffer will be overwritten with new self IDs and we | |
944 | * will read out inconsistent data. The OHCI specification | |
945 | * (section 11.2) recommends a technique similar to | |
946 | * linux/seqlock.h, where we remember the generation of the | |
947 | * self IDs in the buffer before reading them out and compare | |
948 | * it to the current generation after reading them out. If | |
949 | * the two generations match we know we have a consistent set | |
c781c06d KH |
950 | * of self IDs. |
951 | */ | |
ed568912 KH |
952 | |
953 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
954 | if (new_generation != generation) { | |
955 | fw_notify("recursive bus reset detected, " | |
956 | "discarding self ids\n"); | |
957 | return; | |
958 | } | |
959 | ||
960 | /* FIXME: Document how the locking works. */ | |
961 | spin_lock_irqsave(&ohci->lock, flags); | |
962 | ||
963 | ohci->generation = generation; | |
f319b6a0 KH |
964 | context_stop(&ohci->at_request_ctx); |
965 | context_stop(&ohci->at_response_ctx); | |
ed568912 KH |
966 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
967 | ||
c781c06d KH |
968 | /* |
969 | * This next bit is unrelated to the AT context stuff but we | |
ed568912 KH |
970 | * have to do it under the spinlock also. If a new config rom |
971 | * was set up before this reset, the old one is now no longer | |
972 | * in use and we can free it. Update the config rom pointers | |
973 | * to point to the current config rom and clear the | |
c781c06d KH |
974 | * next_config_rom pointer so a new udpate can take place. |
975 | */ | |
ed568912 KH |
976 | |
977 | if (ohci->next_config_rom != NULL) { | |
4eaff7d6 SR |
978 | free_rom = ohci->config_rom; |
979 | free_rom_bus = ohci->config_rom_bus; | |
ed568912 KH |
980 | ohci->config_rom = ohci->next_config_rom; |
981 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
982 | ohci->next_config_rom = NULL; | |
983 | ||
c781c06d KH |
984 | /* |
985 | * Restore config_rom image and manually update | |
ed568912 KH |
986 | * config_rom registers. Writing the header quadlet |
987 | * will indicate that the config rom is ready, so we | |
c781c06d KH |
988 | * do that last. |
989 | */ | |
ed568912 KH |
990 | reg_write(ohci, OHCI1394_BusOptions, |
991 | be32_to_cpu(ohci->config_rom[2])); | |
992 | ohci->config_rom[0] = cpu_to_be32(ohci->next_header); | |
993 | reg_write(ohci, OHCI1394_ConfigROMhdr, ohci->next_header); | |
994 | } | |
995 | ||
996 | spin_unlock_irqrestore(&ohci->lock, flags); | |
997 | ||
4eaff7d6 SR |
998 | if (free_rom) |
999 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1000 | free_rom, free_rom_bus); | |
1001 | ||
e636fe25 | 1002 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
ed568912 KH |
1003 | self_id_count, ohci->self_id_buffer); |
1004 | } | |
1005 | ||
1006 | static irqreturn_t irq_handler(int irq, void *data) | |
1007 | { | |
1008 | struct fw_ohci *ohci = data; | |
d60d7f1d | 1009 | u32 event, iso_event, cycle_time; |
ed568912 KH |
1010 | int i; |
1011 | ||
1012 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
1013 | ||
a515958d | 1014 | if (!event || !~event) |
ed568912 KH |
1015 | return IRQ_NONE; |
1016 | ||
1017 | reg_write(ohci, OHCI1394_IntEventClear, event); | |
1018 | ||
1019 | if (event & OHCI1394_selfIDComplete) | |
1020 | tasklet_schedule(&ohci->bus_reset_tasklet); | |
1021 | ||
1022 | if (event & OHCI1394_RQPkt) | |
1023 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
1024 | ||
1025 | if (event & OHCI1394_RSPkt) | |
1026 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
1027 | ||
1028 | if (event & OHCI1394_reqTxComplete) | |
1029 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
1030 | ||
1031 | if (event & OHCI1394_respTxComplete) | |
1032 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
1033 | ||
c889475f | 1034 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); |
ed568912 KH |
1035 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); |
1036 | ||
1037 | while (iso_event) { | |
1038 | i = ffs(iso_event) - 1; | |
30200739 | 1039 | tasklet_schedule(&ohci->ir_context_list[i].context.tasklet); |
ed568912 KH |
1040 | iso_event &= ~(1 << i); |
1041 | } | |
1042 | ||
c889475f | 1043 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); |
ed568912 KH |
1044 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); |
1045 | ||
1046 | while (iso_event) { | |
1047 | i = ffs(iso_event) - 1; | |
30200739 | 1048 | tasklet_schedule(&ohci->it_context_list[i].context.tasklet); |
ed568912 KH |
1049 | iso_event &= ~(1 << i); |
1050 | } | |
1051 | ||
d60d7f1d KH |
1052 | if (event & OHCI1394_cycle64Seconds) { |
1053 | cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1054 | if ((cycle_time & 0x80000000) == 0) | |
1055 | ohci->bus_seconds++; | |
1056 | } | |
1057 | ||
ed568912 KH |
1058 | return IRQ_HANDLED; |
1059 | } | |
1060 | ||
2aef469a KH |
1061 | static int software_reset(struct fw_ohci *ohci) |
1062 | { | |
1063 | int i; | |
1064 | ||
1065 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
1066 | ||
1067 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
1068 | if ((reg_read(ohci, OHCI1394_HCControlSet) & | |
1069 | OHCI1394_HCControl_softReset) == 0) | |
1070 | return 0; | |
1071 | msleep(1); | |
1072 | } | |
1073 | ||
1074 | return -EBUSY; | |
1075 | } | |
1076 | ||
ed568912 KH |
1077 | static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length) |
1078 | { | |
1079 | struct fw_ohci *ohci = fw_ohci(card); | |
1080 | struct pci_dev *dev = to_pci_dev(card->device); | |
1081 | ||
2aef469a KH |
1082 | if (software_reset(ohci)) { |
1083 | fw_error("Failed to reset ohci card.\n"); | |
1084 | return -EBUSY; | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Now enable LPS, which we need in order to start accessing | |
1089 | * most of the registers. In fact, on some cards (ALI M5251), | |
1090 | * accessing registers in the SClk domain without LPS enabled | |
1091 | * will lock up the machine. Wait 50msec to make sure we have | |
1092 | * full link enabled. | |
1093 | */ | |
1094 | reg_write(ohci, OHCI1394_HCControlSet, | |
1095 | OHCI1394_HCControl_LPS | | |
1096 | OHCI1394_HCControl_postedWriteEnable); | |
1097 | flush_writes(ohci); | |
1098 | msleep(50); | |
1099 | ||
1100 | reg_write(ohci, OHCI1394_HCControlClear, | |
1101 | OHCI1394_HCControl_noByteSwapData); | |
1102 | ||
1103 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1104 | OHCI1394_LinkControl_rcvSelfID | | |
1105 | OHCI1394_LinkControl_cycleTimerEnable | | |
1106 | OHCI1394_LinkControl_cycleMaster); | |
1107 | ||
1108 | reg_write(ohci, OHCI1394_ATRetries, | |
1109 | OHCI1394_MAX_AT_REQ_RETRIES | | |
1110 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
1111 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8)); | |
1112 | ||
1113 | ar_context_run(&ohci->ar_request_ctx); | |
1114 | ar_context_run(&ohci->ar_response_ctx); | |
1115 | ||
1116 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); | |
1117 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); | |
1118 | reg_write(ohci, OHCI1394_IntEventClear, ~0); | |
1119 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
1120 | reg_write(ohci, OHCI1394_IntMaskSet, | |
1121 | OHCI1394_selfIDComplete | | |
1122 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
1123 | OHCI1394_reqTxComplete | OHCI1394_respTxComplete | | |
1124 | OHCI1394_isochRx | OHCI1394_isochTx | | |
1125 | OHCI1394_masterIntEnable | | |
1126 | OHCI1394_cycle64Seconds); | |
1127 | ||
1128 | /* Activate link_on bit and contender bit in our self ID packets.*/ | |
1129 | if (ohci_update_phy_reg(card, 4, 0, | |
1130 | PHY_LINK_ACTIVE | PHY_CONTENDER) < 0) | |
1131 | return -EIO; | |
1132 | ||
c781c06d KH |
1133 | /* |
1134 | * When the link is not yet enabled, the atomic config rom | |
ed568912 KH |
1135 | * update mechanism described below in ohci_set_config_rom() |
1136 | * is not active. We have to update ConfigRomHeader and | |
1137 | * BusOptions manually, and the write to ConfigROMmap takes | |
1138 | * effect immediately. We tie this to the enabling of the | |
1139 | * link, so we have a valid config rom before enabling - the | |
1140 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
1141 | * values before enabling. | |
1142 | * | |
1143 | * However, when the ConfigROMmap is written, some controllers | |
1144 | * always read back quadlets 0 and 2 from the config rom to | |
1145 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
1146 | * They shouldn't do that in this initial case where the link | |
1147 | * isn't enabled. This means we have to use the same | |
1148 | * workaround here, setting the bus header to 0 and then write | |
1149 | * the right values in the bus reset tasklet. | |
1150 | */ | |
1151 | ||
1152 | ohci->next_config_rom = | |
1153 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1154 | &ohci->next_config_rom_bus, GFP_KERNEL); | |
1155 | if (ohci->next_config_rom == NULL) | |
1156 | return -ENOMEM; | |
1157 | ||
1158 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); | |
1159 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, length * 4); | |
1160 | ||
1161 | ohci->next_header = config_rom[0]; | |
1162 | ohci->next_config_rom[0] = 0; | |
1163 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
1164 | reg_write(ohci, OHCI1394_BusOptions, config_rom[2]); | |
1165 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); | |
1166 | ||
1167 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
1168 | ||
1169 | if (request_irq(dev->irq, irq_handler, | |
65efffa8 | 1170 | IRQF_SHARED, ohci_driver_name, ohci)) { |
ed568912 KH |
1171 | fw_error("Failed to allocate shared interrupt %d.\n", |
1172 | dev->irq); | |
1173 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1174 | ohci->config_rom, ohci->config_rom_bus); | |
1175 | return -EIO; | |
1176 | } | |
1177 | ||
1178 | reg_write(ohci, OHCI1394_HCControlSet, | |
1179 | OHCI1394_HCControl_linkEnable | | |
1180 | OHCI1394_HCControl_BIBimageValid); | |
1181 | flush_writes(ohci); | |
1182 | ||
c781c06d KH |
1183 | /* |
1184 | * We are ready to go, initiate bus reset to finish the | |
1185 | * initialization. | |
1186 | */ | |
ed568912 KH |
1187 | |
1188 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | static int | |
1194 | ohci_set_config_rom(struct fw_card *card, u32 *config_rom, size_t length) | |
1195 | { | |
1196 | struct fw_ohci *ohci; | |
1197 | unsigned long flags; | |
4eaff7d6 | 1198 | int retval = -EBUSY; |
ed568912 KH |
1199 | __be32 *next_config_rom; |
1200 | dma_addr_t next_config_rom_bus; | |
1201 | ||
1202 | ohci = fw_ohci(card); | |
1203 | ||
c781c06d KH |
1204 | /* |
1205 | * When the OHCI controller is enabled, the config rom update | |
ed568912 KH |
1206 | * mechanism is a bit tricky, but easy enough to use. See |
1207 | * section 5.5.6 in the OHCI specification. | |
1208 | * | |
1209 | * The OHCI controller caches the new config rom address in a | |
1210 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
1211 | * for the changes to take place. When the bus reset is | |
1212 | * detected, the controller loads the new values for the | |
1213 | * ConfigRomHeader and BusOptions registers from the specified | |
1214 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
1215 | * shadow register. All automatically and atomically. | |
1216 | * | |
1217 | * Now, there's a twist to this story. The automatic load of | |
1218 | * ConfigRomHeader and BusOptions doesn't honor the | |
1219 | * noByteSwapData bit, so with a be32 config rom, the | |
1220 | * controller will load be32 values in to these registers | |
1221 | * during the atomic update, even on litte endian | |
1222 | * architectures. The workaround we use is to put a 0 in the | |
1223 | * header quadlet; 0 is endian agnostic and means that the | |
1224 | * config rom isn't ready yet. In the bus reset tasklet we | |
1225 | * then set up the real values for the two registers. | |
1226 | * | |
1227 | * We use ohci->lock to avoid racing with the code that sets | |
1228 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). | |
1229 | */ | |
1230 | ||
1231 | next_config_rom = | |
1232 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1233 | &next_config_rom_bus, GFP_KERNEL); | |
1234 | if (next_config_rom == NULL) | |
1235 | return -ENOMEM; | |
1236 | ||
1237 | spin_lock_irqsave(&ohci->lock, flags); | |
1238 | ||
1239 | if (ohci->next_config_rom == NULL) { | |
1240 | ohci->next_config_rom = next_config_rom; | |
1241 | ohci->next_config_rom_bus = next_config_rom_bus; | |
1242 | ||
1243 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); | |
1244 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, | |
1245 | length * 4); | |
1246 | ||
1247 | ohci->next_header = config_rom[0]; | |
1248 | ohci->next_config_rom[0] = 0; | |
1249 | ||
1250 | reg_write(ohci, OHCI1394_ConfigROMmap, | |
1251 | ohci->next_config_rom_bus); | |
4eaff7d6 | 1252 | retval = 0; |
ed568912 KH |
1253 | } |
1254 | ||
1255 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1256 | ||
c781c06d KH |
1257 | /* |
1258 | * Now initiate a bus reset to have the changes take | |
ed568912 KH |
1259 | * effect. We clean up the old config rom memory and DMA |
1260 | * mappings in the bus reset tasklet, since the OHCI | |
1261 | * controller could need to access it before the bus reset | |
c781c06d KH |
1262 | * takes effect. |
1263 | */ | |
ed568912 KH |
1264 | if (retval == 0) |
1265 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
4eaff7d6 SR |
1266 | else |
1267 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1268 | next_config_rom, next_config_rom_bus); | |
ed568912 KH |
1269 | |
1270 | return retval; | |
1271 | } | |
1272 | ||
1273 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
1274 | { | |
1275 | struct fw_ohci *ohci = fw_ohci(card); | |
1276 | ||
1277 | at_context_transmit(&ohci->at_request_ctx, packet); | |
1278 | } | |
1279 | ||
1280 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
1281 | { | |
1282 | struct fw_ohci *ohci = fw_ohci(card); | |
1283 | ||
1284 | at_context_transmit(&ohci->at_response_ctx, packet); | |
1285 | } | |
1286 | ||
730c32f5 KH |
1287 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
1288 | { | |
1289 | struct fw_ohci *ohci = fw_ohci(card); | |
f319b6a0 KH |
1290 | struct context *ctx = &ohci->at_request_ctx; |
1291 | struct driver_data *driver_data = packet->driver_data; | |
1292 | int retval = -ENOENT; | |
730c32f5 | 1293 | |
f319b6a0 | 1294 | tasklet_disable(&ctx->tasklet); |
730c32f5 | 1295 | |
f319b6a0 KH |
1296 | if (packet->ack != 0) |
1297 | goto out; | |
730c32f5 | 1298 | |
f319b6a0 KH |
1299 | driver_data->packet = NULL; |
1300 | packet->ack = RCODE_CANCELLED; | |
1301 | packet->callback(packet, &ohci->card, packet->ack); | |
1302 | retval = 0; | |
730c32f5 | 1303 | |
f319b6a0 KH |
1304 | out: |
1305 | tasklet_enable(&ctx->tasklet); | |
730c32f5 | 1306 | |
f319b6a0 | 1307 | return retval; |
730c32f5 KH |
1308 | } |
1309 | ||
ed568912 KH |
1310 | static int |
1311 | ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation) | |
1312 | { | |
1313 | struct fw_ohci *ohci = fw_ohci(card); | |
1314 | unsigned long flags; | |
907293d7 | 1315 | int n, retval = 0; |
ed568912 | 1316 | |
c781c06d KH |
1317 | /* |
1318 | * FIXME: Make sure this bitmask is cleared when we clear the busReset | |
1319 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. | |
1320 | */ | |
ed568912 KH |
1321 | |
1322 | spin_lock_irqsave(&ohci->lock, flags); | |
1323 | ||
1324 | if (ohci->generation != generation) { | |
1325 | retval = -ESTALE; | |
1326 | goto out; | |
1327 | } | |
1328 | ||
c781c06d KH |
1329 | /* |
1330 | * Note, if the node ID contains a non-local bus ID, physical DMA is | |
1331 | * enabled for _all_ nodes on remote buses. | |
1332 | */ | |
907293d7 SR |
1333 | |
1334 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
1335 | if (n < 32) | |
1336 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
1337 | else | |
1338 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
1339 | ||
ed568912 | 1340 | flush_writes(ohci); |
ed568912 | 1341 | out: |
6cad95fe | 1342 | spin_unlock_irqrestore(&ohci->lock, flags); |
ed568912 KH |
1343 | return retval; |
1344 | } | |
373b2edd | 1345 | |
d60d7f1d KH |
1346 | static u64 |
1347 | ohci_get_bus_time(struct fw_card *card) | |
1348 | { | |
1349 | struct fw_ohci *ohci = fw_ohci(card); | |
1350 | u32 cycle_time; | |
1351 | u64 bus_time; | |
1352 | ||
1353 | cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1354 | bus_time = ((u64) ohci->bus_seconds << 32) | cycle_time; | |
1355 | ||
1356 | return bus_time; | |
1357 | } | |
1358 | ||
d2746dc1 KH |
1359 | static int handle_ir_dualbuffer_packet(struct context *context, |
1360 | struct descriptor *d, | |
1361 | struct descriptor *last) | |
ed568912 | 1362 | { |
295e3feb KH |
1363 | struct iso_context *ctx = |
1364 | container_of(context, struct iso_context, context); | |
1365 | struct db_descriptor *db = (struct db_descriptor *) d; | |
c70dc788 | 1366 | __le32 *ir_header; |
9b32d5f3 | 1367 | size_t header_length; |
c70dc788 KH |
1368 | void *p, *end; |
1369 | int i; | |
d2746dc1 | 1370 | |
295e3feb KH |
1371 | if (db->first_res_count > 0 && db->second_res_count > 0) |
1372 | /* This descriptor isn't done yet, stop iteration. */ | |
1373 | return 0; | |
1374 | ||
c70dc788 KH |
1375 | header_length = le16_to_cpu(db->first_req_count) - |
1376 | le16_to_cpu(db->first_res_count); | |
1377 | ||
1378 | i = ctx->header_length; | |
1379 | p = db + 1; | |
1380 | end = p + header_length; | |
1381 | while (p < end && i + ctx->base.header_size <= PAGE_SIZE) { | |
c781c06d KH |
1382 | /* |
1383 | * The iso header is byteswapped to little endian by | |
15536221 KH |
1384 | * the controller, but the remaining header quadlets |
1385 | * are big endian. We want to present all the headers | |
1386 | * as big endian, so we have to swap the first | |
c781c06d KH |
1387 | * quadlet. |
1388 | */ | |
15536221 KH |
1389 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); |
1390 | memcpy(ctx->header + i + 4, p + 8, ctx->base.header_size - 4); | |
c70dc788 KH |
1391 | i += ctx->base.header_size; |
1392 | p += ctx->base.header_size + 4; | |
1393 | } | |
1394 | ||
1395 | ctx->header_length = i; | |
9b32d5f3 | 1396 | |
a77754a7 | 1397 | if (le16_to_cpu(db->control) & DESCRIPTOR_IRQ_ALWAYS) { |
c70dc788 KH |
1398 | ir_header = (__le32 *) (db + 1); |
1399 | ctx->base.callback(&ctx->base, | |
1400 | le32_to_cpu(ir_header[0]) & 0xffff, | |
9b32d5f3 | 1401 | ctx->header_length, ctx->header, |
295e3feb | 1402 | ctx->base.callback_data); |
9b32d5f3 KH |
1403 | ctx->header_length = 0; |
1404 | } | |
ed568912 | 1405 | |
295e3feb | 1406 | return 1; |
ed568912 KH |
1407 | } |
1408 | ||
30200739 KH |
1409 | static int handle_it_packet(struct context *context, |
1410 | struct descriptor *d, | |
1411 | struct descriptor *last) | |
ed568912 | 1412 | { |
30200739 KH |
1413 | struct iso_context *ctx = |
1414 | container_of(context, struct iso_context, context); | |
373b2edd | 1415 | |
30200739 KH |
1416 | if (last->transfer_status == 0) |
1417 | /* This descriptor isn't done yet, stop iteration. */ | |
1418 | return 0; | |
1419 | ||
a77754a7 | 1420 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) |
9b32d5f3 KH |
1421 | ctx->base.callback(&ctx->base, le16_to_cpu(last->res_count), |
1422 | 0, NULL, ctx->base.callback_data); | |
30200739 KH |
1423 | |
1424 | return 1; | |
ed568912 KH |
1425 | } |
1426 | ||
30200739 | 1427 | static struct fw_iso_context * |
eb0306ea | 1428 | ohci_allocate_iso_context(struct fw_card *card, int type, size_t header_size) |
ed568912 KH |
1429 | { |
1430 | struct fw_ohci *ohci = fw_ohci(card); | |
1431 | struct iso_context *ctx, *list; | |
30200739 | 1432 | descriptor_callback_t callback; |
295e3feb | 1433 | u32 *mask, regs; |
ed568912 | 1434 | unsigned long flags; |
9b32d5f3 | 1435 | int index, retval = -ENOMEM; |
ed568912 KH |
1436 | |
1437 | if (type == FW_ISO_CONTEXT_TRANSMIT) { | |
1438 | mask = &ohci->it_context_mask; | |
1439 | list = ohci->it_context_list; | |
30200739 | 1440 | callback = handle_it_packet; |
ed568912 | 1441 | } else { |
373b2edd SR |
1442 | mask = &ohci->ir_context_mask; |
1443 | list = ohci->ir_context_list; | |
c70dc788 | 1444 | callback = handle_ir_dualbuffer_packet; |
ed568912 KH |
1445 | } |
1446 | ||
c70dc788 | 1447 | /* FIXME: We need a fallback for pre 1.1 OHCI. */ |
e364cf4e KH |
1448 | if (callback == handle_ir_dualbuffer_packet && |
1449 | ohci->version < OHCI_VERSION_1_1) | |
1450 | return ERR_PTR(-EINVAL); | |
1451 | ||
ed568912 KH |
1452 | spin_lock_irqsave(&ohci->lock, flags); |
1453 | index = ffs(*mask) - 1; | |
1454 | if (index >= 0) | |
1455 | *mask &= ~(1 << index); | |
1456 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1457 | ||
1458 | if (index < 0) | |
1459 | return ERR_PTR(-EBUSY); | |
1460 | ||
373b2edd SR |
1461 | if (type == FW_ISO_CONTEXT_TRANSMIT) |
1462 | regs = OHCI1394_IsoXmitContextBase(index); | |
1463 | else | |
1464 | regs = OHCI1394_IsoRcvContextBase(index); | |
1465 | ||
ed568912 | 1466 | ctx = &list[index]; |
2d826cc5 | 1467 | memset(ctx, 0, sizeof(*ctx)); |
9b32d5f3 KH |
1468 | ctx->header_length = 0; |
1469 | ctx->header = (void *) __get_free_page(GFP_KERNEL); | |
1470 | if (ctx->header == NULL) | |
1471 | goto out; | |
1472 | ||
30200739 | 1473 | retval = context_init(&ctx->context, ohci, ISO_BUFFER_SIZE, |
295e3feb | 1474 | regs, callback); |
9b32d5f3 KH |
1475 | if (retval < 0) |
1476 | goto out_with_header; | |
ed568912 KH |
1477 | |
1478 | return &ctx->base; | |
9b32d5f3 KH |
1479 | |
1480 | out_with_header: | |
1481 | free_page((unsigned long)ctx->header); | |
1482 | out: | |
1483 | spin_lock_irqsave(&ohci->lock, flags); | |
1484 | *mask |= 1 << index; | |
1485 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1486 | ||
1487 | return ERR_PTR(retval); | |
ed568912 KH |
1488 | } |
1489 | ||
eb0306ea KH |
1490 | static int ohci_start_iso(struct fw_iso_context *base, |
1491 | s32 cycle, u32 sync, u32 tags) | |
ed568912 | 1492 | { |
373b2edd | 1493 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 1494 | struct fw_ohci *ohci = ctx->context.ohci; |
8a2f7d93 | 1495 | u32 control, match; |
ed568912 KH |
1496 | int index; |
1497 | ||
295e3feb KH |
1498 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { |
1499 | index = ctx - ohci->it_context_list; | |
8a2f7d93 KH |
1500 | match = 0; |
1501 | if (cycle >= 0) | |
1502 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | | |
295e3feb | 1503 | (cycle & 0x7fff) << 16; |
21efb3cf | 1504 | |
295e3feb KH |
1505 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
1506 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
8a2f7d93 | 1507 | context_run(&ctx->context, match); |
295e3feb KH |
1508 | } else { |
1509 | index = ctx - ohci->ir_context_list; | |
8a2f7d93 KH |
1510 | control = IR_CONTEXT_DUAL_BUFFER_MODE | IR_CONTEXT_ISOCH_HEADER; |
1511 | match = (tags << 28) | (sync << 8) | ctx->base.channel; | |
1512 | if (cycle >= 0) { | |
1513 | match |= (cycle & 0x07fff) << 12; | |
1514 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; | |
1515 | } | |
ed568912 | 1516 | |
295e3feb KH |
1517 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
1518 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); | |
a77754a7 | 1519 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
8a2f7d93 | 1520 | context_run(&ctx->context, control); |
295e3feb | 1521 | } |
ed568912 KH |
1522 | |
1523 | return 0; | |
1524 | } | |
1525 | ||
b8295668 KH |
1526 | static int ohci_stop_iso(struct fw_iso_context *base) |
1527 | { | |
1528 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 1529 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
b8295668 KH |
1530 | int index; |
1531 | ||
1532 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
1533 | index = ctx - ohci->it_context_list; | |
1534 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
1535 | } else { | |
1536 | index = ctx - ohci->ir_context_list; | |
1537 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
1538 | } | |
1539 | flush_writes(ohci); | |
1540 | context_stop(&ctx->context); | |
1541 | ||
1542 | return 0; | |
1543 | } | |
1544 | ||
ed568912 KH |
1545 | static void ohci_free_iso_context(struct fw_iso_context *base) |
1546 | { | |
1547 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 1548 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
ed568912 KH |
1549 | unsigned long flags; |
1550 | int index; | |
1551 | ||
b8295668 KH |
1552 | ohci_stop_iso(base); |
1553 | context_release(&ctx->context); | |
9b32d5f3 | 1554 | free_page((unsigned long)ctx->header); |
b8295668 | 1555 | |
ed568912 KH |
1556 | spin_lock_irqsave(&ohci->lock, flags); |
1557 | ||
1558 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
1559 | index = ctx - ohci->it_context_list; | |
ed568912 KH |
1560 | ohci->it_context_mask |= 1 << index; |
1561 | } else { | |
1562 | index = ctx - ohci->ir_context_list; | |
ed568912 KH |
1563 | ohci->ir_context_mask |= 1 << index; |
1564 | } | |
ed568912 KH |
1565 | |
1566 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1567 | } | |
1568 | ||
1569 | static int | |
295e3feb KH |
1570 | ohci_queue_iso_transmit(struct fw_iso_context *base, |
1571 | struct fw_iso_packet *packet, | |
1572 | struct fw_iso_buffer *buffer, | |
1573 | unsigned long payload) | |
ed568912 | 1574 | { |
373b2edd | 1575 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 1576 | struct descriptor *d, *last, *pd; |
ed568912 KH |
1577 | struct fw_iso_packet *p; |
1578 | __le32 *header; | |
9aad8125 | 1579 | dma_addr_t d_bus, page_bus; |
ed568912 KH |
1580 | u32 z, header_z, payload_z, irq; |
1581 | u32 payload_index, payload_end_index, next_page_index; | |
30200739 | 1582 | int page, end_page, i, length, offset; |
ed568912 | 1583 | |
c781c06d KH |
1584 | /* |
1585 | * FIXME: Cycle lost behavior should be configurable: lose | |
1586 | * packet, retransmit or terminate.. | |
1587 | */ | |
ed568912 KH |
1588 | |
1589 | p = packet; | |
9aad8125 | 1590 | payload_index = payload; |
ed568912 KH |
1591 | |
1592 | if (p->skip) | |
1593 | z = 1; | |
1594 | else | |
1595 | z = 2; | |
1596 | if (p->header_length > 0) | |
1597 | z++; | |
1598 | ||
1599 | /* Determine the first page the payload isn't contained in. */ | |
1600 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
1601 | if (p->payload_length > 0) | |
1602 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
1603 | else | |
1604 | payload_z = 0; | |
1605 | ||
1606 | z += payload_z; | |
1607 | ||
1608 | /* Get header size in number of descriptors. */ | |
2d826cc5 | 1609 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
ed568912 | 1610 | |
30200739 KH |
1611 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
1612 | if (d == NULL) | |
1613 | return -ENOMEM; | |
ed568912 KH |
1614 | |
1615 | if (!p->skip) { | |
a77754a7 | 1616 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
ed568912 KH |
1617 | d[0].req_count = cpu_to_le16(8); |
1618 | ||
1619 | header = (__le32 *) &d[1]; | |
a77754a7 KH |
1620 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
1621 | IT_HEADER_TAG(p->tag) | | |
1622 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | | |
1623 | IT_HEADER_CHANNEL(ctx->base.channel) | | |
1624 | IT_HEADER_SPEED(ctx->base.speed)); | |
ed568912 | 1625 | header[1] = |
a77754a7 | 1626 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
ed568912 KH |
1627 | p->payload_length)); |
1628 | } | |
1629 | ||
1630 | if (p->header_length > 0) { | |
1631 | d[2].req_count = cpu_to_le16(p->header_length); | |
2d826cc5 | 1632 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
ed568912 KH |
1633 | memcpy(&d[z], p->header, p->header_length); |
1634 | } | |
1635 | ||
1636 | pd = d + z - payload_z; | |
1637 | payload_end_index = payload_index + p->payload_length; | |
1638 | for (i = 0; i < payload_z; i++) { | |
1639 | page = payload_index >> PAGE_SHIFT; | |
1640 | offset = payload_index & ~PAGE_MASK; | |
1641 | next_page_index = (page + 1) << PAGE_SHIFT; | |
1642 | length = | |
1643 | min(next_page_index, payload_end_index) - payload_index; | |
1644 | pd[i].req_count = cpu_to_le16(length); | |
9aad8125 KH |
1645 | |
1646 | page_bus = page_private(buffer->pages[page]); | |
1647 | pd[i].data_address = cpu_to_le32(page_bus + offset); | |
ed568912 KH |
1648 | |
1649 | payload_index += length; | |
1650 | } | |
1651 | ||
ed568912 | 1652 | if (p->interrupt) |
a77754a7 | 1653 | irq = DESCRIPTOR_IRQ_ALWAYS; |
ed568912 | 1654 | else |
a77754a7 | 1655 | irq = DESCRIPTOR_NO_IRQ; |
ed568912 | 1656 | |
30200739 | 1657 | last = z == 2 ? d : d + z - 1; |
a77754a7 KH |
1658 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
1659 | DESCRIPTOR_STATUS | | |
1660 | DESCRIPTOR_BRANCH_ALWAYS | | |
cbb59da7 | 1661 | irq); |
ed568912 | 1662 | |
30200739 | 1663 | context_append(&ctx->context, d, z, header_z); |
ed568912 KH |
1664 | |
1665 | return 0; | |
1666 | } | |
373b2edd | 1667 | |
295e3feb | 1668 | static int |
d2746dc1 KH |
1669 | ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base, |
1670 | struct fw_iso_packet *packet, | |
1671 | struct fw_iso_buffer *buffer, | |
1672 | unsigned long payload) | |
295e3feb KH |
1673 | { |
1674 | struct iso_context *ctx = container_of(base, struct iso_context, base); | |
1675 | struct db_descriptor *db = NULL; | |
1676 | struct descriptor *d; | |
1677 | struct fw_iso_packet *p; | |
1678 | dma_addr_t d_bus, page_bus; | |
1679 | u32 z, header_z, length, rest; | |
c70dc788 | 1680 | int page, offset, packet_count, header_size; |
373b2edd | 1681 | |
c781c06d KH |
1682 | /* |
1683 | * FIXME: Cycle lost behavior should be configurable: lose | |
1684 | * packet, retransmit or terminate.. | |
1685 | */ | |
295e3feb | 1686 | |
c70dc788 KH |
1687 | if (packet->skip) { |
1688 | d = context_get_descriptors(&ctx->context, 2, &d_bus); | |
1689 | if (d == NULL) | |
1690 | return -ENOMEM; | |
1691 | ||
1692 | db = (struct db_descriptor *) d; | |
a77754a7 KH |
1693 | db->control = cpu_to_le16(DESCRIPTOR_STATUS | |
1694 | DESCRIPTOR_BRANCH_ALWAYS | | |
1695 | DESCRIPTOR_WAIT); | |
c70dc788 KH |
1696 | db->first_size = cpu_to_le16(ctx->base.header_size + 4); |
1697 | context_append(&ctx->context, d, 2, 0); | |
1698 | } | |
98b6cbe8 | 1699 | |
295e3feb KH |
1700 | p = packet; |
1701 | z = 2; | |
1702 | ||
c781c06d KH |
1703 | /* |
1704 | * The OHCI controller puts the status word in the header | |
1705 | * buffer too, so we need 4 extra bytes per packet. | |
1706 | */ | |
c70dc788 KH |
1707 | packet_count = p->header_length / ctx->base.header_size; |
1708 | header_size = packet_count * (ctx->base.header_size + 4); | |
1709 | ||
295e3feb | 1710 | /* Get header size in number of descriptors. */ |
2d826cc5 | 1711 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); |
295e3feb KH |
1712 | page = payload >> PAGE_SHIFT; |
1713 | offset = payload & ~PAGE_MASK; | |
1714 | rest = p->payload_length; | |
1715 | ||
1716 | /* FIXME: OHCI 1.0 doesn't support dual buffer receive */ | |
295e3feb KH |
1717 | /* FIXME: make packet-per-buffer/dual-buffer a context option */ |
1718 | while (rest > 0) { | |
1719 | d = context_get_descriptors(&ctx->context, | |
1720 | z + header_z, &d_bus); | |
1721 | if (d == NULL) | |
1722 | return -ENOMEM; | |
1723 | ||
1724 | db = (struct db_descriptor *) d; | |
a77754a7 KH |
1725 | db->control = cpu_to_le16(DESCRIPTOR_STATUS | |
1726 | DESCRIPTOR_BRANCH_ALWAYS); | |
c70dc788 KH |
1727 | db->first_size = cpu_to_le16(ctx->base.header_size + 4); |
1728 | db->first_req_count = cpu_to_le16(header_size); | |
1e1d196b | 1729 | db->first_res_count = db->first_req_count; |
2d826cc5 | 1730 | db->first_buffer = cpu_to_le32(d_bus + sizeof(*db)); |
373b2edd | 1731 | |
295e3feb KH |
1732 | if (offset + rest < PAGE_SIZE) |
1733 | length = rest; | |
1734 | else | |
1735 | length = PAGE_SIZE - offset; | |
1736 | ||
1e1d196b KH |
1737 | db->second_req_count = cpu_to_le16(length); |
1738 | db->second_res_count = db->second_req_count; | |
295e3feb KH |
1739 | page_bus = page_private(buffer->pages[page]); |
1740 | db->second_buffer = cpu_to_le32(page_bus + offset); | |
1741 | ||
cb2d2cdb | 1742 | if (p->interrupt && length == rest) |
a77754a7 | 1743 | db->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
cb2d2cdb | 1744 | |
295e3feb KH |
1745 | context_append(&ctx->context, d, z, header_z); |
1746 | offset = (offset + length) & ~PAGE_MASK; | |
1747 | rest -= length; | |
1748 | page++; | |
1749 | } | |
1750 | ||
d2746dc1 KH |
1751 | return 0; |
1752 | } | |
21efb3cf | 1753 | |
295e3feb KH |
1754 | static int |
1755 | ohci_queue_iso(struct fw_iso_context *base, | |
1756 | struct fw_iso_packet *packet, | |
1757 | struct fw_iso_buffer *buffer, | |
1758 | unsigned long payload) | |
1759 | { | |
e364cf4e KH |
1760 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
1761 | ||
295e3feb KH |
1762 | if (base->type == FW_ISO_CONTEXT_TRANSMIT) |
1763 | return ohci_queue_iso_transmit(base, packet, buffer, payload); | |
e364cf4e | 1764 | else if (ctx->context.ohci->version >= OHCI_VERSION_1_1) |
d2746dc1 KH |
1765 | return ohci_queue_iso_receive_dualbuffer(base, packet, |
1766 | buffer, payload); | |
e364cf4e KH |
1767 | else |
1768 | /* FIXME: Implement fallback for OHCI 1.0 controllers. */ | |
1769 | return -EINVAL; | |
295e3feb KH |
1770 | } |
1771 | ||
21ebcd12 | 1772 | static const struct fw_card_driver ohci_driver = { |
ed568912 KH |
1773 | .name = ohci_driver_name, |
1774 | .enable = ohci_enable, | |
1775 | .update_phy_reg = ohci_update_phy_reg, | |
1776 | .set_config_rom = ohci_set_config_rom, | |
1777 | .send_request = ohci_send_request, | |
1778 | .send_response = ohci_send_response, | |
730c32f5 | 1779 | .cancel_packet = ohci_cancel_packet, |
ed568912 | 1780 | .enable_phys_dma = ohci_enable_phys_dma, |
d60d7f1d | 1781 | .get_bus_time = ohci_get_bus_time, |
ed568912 KH |
1782 | |
1783 | .allocate_iso_context = ohci_allocate_iso_context, | |
1784 | .free_iso_context = ohci_free_iso_context, | |
1785 | .queue_iso = ohci_queue_iso, | |
69cdb726 | 1786 | .start_iso = ohci_start_iso, |
b8295668 | 1787 | .stop_iso = ohci_stop_iso, |
ed568912 KH |
1788 | }; |
1789 | ||
ed568912 KH |
1790 | static int __devinit |
1791 | pci_probe(struct pci_dev *dev, const struct pci_device_id *ent) | |
1792 | { | |
1793 | struct fw_ohci *ohci; | |
e364cf4e | 1794 | u32 bus_options, max_receive, link_speed; |
ed568912 | 1795 | u64 guid; |
d79406dd | 1796 | int err; |
ed568912 KH |
1797 | size_t size; |
1798 | ||
2d826cc5 | 1799 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
ed568912 KH |
1800 | if (ohci == NULL) { |
1801 | fw_error("Could not malloc fw_ohci data.\n"); | |
1802 | return -ENOMEM; | |
1803 | } | |
1804 | ||
1805 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
1806 | ||
d79406dd KH |
1807 | err = pci_enable_device(dev); |
1808 | if (err) { | |
ed568912 | 1809 | fw_error("Failed to enable OHCI hardware.\n"); |
d79406dd | 1810 | goto fail_put_card; |
ed568912 KH |
1811 | } |
1812 | ||
1813 | pci_set_master(dev); | |
1814 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
1815 | pci_set_drvdata(dev, ohci); | |
1816 | ||
1817 | spin_lock_init(&ohci->lock); | |
1818 | ||
1819 | tasklet_init(&ohci->bus_reset_tasklet, | |
1820 | bus_reset_tasklet, (unsigned long)ohci); | |
1821 | ||
d79406dd KH |
1822 | err = pci_request_region(dev, 0, ohci_driver_name); |
1823 | if (err) { | |
ed568912 | 1824 | fw_error("MMIO resource unavailable\n"); |
d79406dd | 1825 | goto fail_disable; |
ed568912 KH |
1826 | } |
1827 | ||
1828 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
1829 | if (ohci->registers == NULL) { | |
1830 | fw_error("Failed to remap registers\n"); | |
d79406dd KH |
1831 | err = -ENXIO; |
1832 | goto fail_iomem; | |
ed568912 KH |
1833 | } |
1834 | ||
ed568912 KH |
1835 | ar_context_init(&ohci->ar_request_ctx, ohci, |
1836 | OHCI1394_AsReqRcvContextControlSet); | |
1837 | ||
1838 | ar_context_init(&ohci->ar_response_ctx, ohci, | |
1839 | OHCI1394_AsRspRcvContextControlSet); | |
1840 | ||
f319b6a0 KH |
1841 | context_init(&ohci->at_request_ctx, ohci, AT_BUFFER_SIZE, |
1842 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); | |
ed568912 | 1843 | |
f319b6a0 KH |
1844 | context_init(&ohci->at_response_ctx, ohci, AT_BUFFER_SIZE, |
1845 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); | |
ed568912 | 1846 | |
ed568912 KH |
1847 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
1848 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); | |
1849 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); | |
1850 | size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask); | |
1851 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); | |
1852 | ||
1853 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
1854 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); | |
1855 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); | |
1856 | size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask); | |
1857 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); | |
1858 | ||
1859 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
1860 | fw_error("Out of memory for it/ir contexts.\n"); | |
d79406dd KH |
1861 | err = -ENOMEM; |
1862 | goto fail_registers; | |
ed568912 KH |
1863 | } |
1864 | ||
1865 | /* self-id dma buffer allocation */ | |
1866 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, | |
1867 | SELF_ID_BUF_SIZE, | |
1868 | &ohci->self_id_bus, | |
1869 | GFP_KERNEL); | |
1870 | if (ohci->self_id_cpu == NULL) { | |
1871 | fw_error("Out of memory for self ID buffer.\n"); | |
d79406dd KH |
1872 | err = -ENOMEM; |
1873 | goto fail_registers; | |
ed568912 KH |
1874 | } |
1875 | ||
ed568912 KH |
1876 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
1877 | max_receive = (bus_options >> 12) & 0xf; | |
1878 | link_speed = bus_options & 0x7; | |
1879 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
1880 | reg_read(ohci, OHCI1394_GUIDLo); | |
1881 | ||
d79406dd KH |
1882 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
1883 | if (err < 0) | |
1884 | goto fail_self_id; | |
ed568912 | 1885 | |
e364cf4e | 1886 | ohci->version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
500be725 | 1887 | fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n", |
e364cf4e | 1888 | dev->dev.bus_id, ohci->version >> 16, ohci->version & 0xff); |
ed568912 KH |
1889 | |
1890 | return 0; | |
d79406dd KH |
1891 | |
1892 | fail_self_id: | |
1893 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, | |
1894 | ohci->self_id_cpu, ohci->self_id_bus); | |
1895 | fail_registers: | |
1896 | kfree(ohci->it_context_list); | |
1897 | kfree(ohci->ir_context_list); | |
1898 | pci_iounmap(dev, ohci->registers); | |
1899 | fail_iomem: | |
1900 | pci_release_region(dev, 0); | |
1901 | fail_disable: | |
1902 | pci_disable_device(dev); | |
1903 | fail_put_card: | |
1904 | fw_card_put(&ohci->card); | |
1905 | ||
1906 | return err; | |
ed568912 KH |
1907 | } |
1908 | ||
1909 | static void pci_remove(struct pci_dev *dev) | |
1910 | { | |
1911 | struct fw_ohci *ohci; | |
1912 | ||
1913 | ohci = pci_get_drvdata(dev); | |
e254a4b4 KH |
1914 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
1915 | flush_writes(ohci); | |
ed568912 KH |
1916 | fw_core_remove_card(&ohci->card); |
1917 | ||
c781c06d KH |
1918 | /* |
1919 | * FIXME: Fail all pending packets here, now that the upper | |
1920 | * layers can't queue any more. | |
1921 | */ | |
ed568912 KH |
1922 | |
1923 | software_reset(ohci); | |
1924 | free_irq(dev->irq, ohci); | |
d79406dd KH |
1925 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
1926 | ohci->self_id_cpu, ohci->self_id_bus); | |
1927 | kfree(ohci->it_context_list); | |
1928 | kfree(ohci->ir_context_list); | |
1929 | pci_iounmap(dev, ohci->registers); | |
1930 | pci_release_region(dev, 0); | |
1931 | pci_disable_device(dev); | |
1932 | fw_card_put(&ohci->card); | |
ed568912 KH |
1933 | |
1934 | fw_notify("Removed fw-ohci device.\n"); | |
1935 | } | |
1936 | ||
2aef469a KH |
1937 | #ifdef CONFIG_PM |
1938 | static int pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
1939 | { | |
1940 | struct fw_ohci *ohci = pci_get_drvdata(pdev); | |
1941 | int err; | |
1942 | ||
1943 | software_reset(ohci); | |
1944 | free_irq(pdev->irq, ohci); | |
1945 | err = pci_save_state(pdev); | |
1946 | if (err) { | |
8a8cea27 | 1947 | fw_error("pci_save_state failed\n"); |
2aef469a KH |
1948 | return err; |
1949 | } | |
1950 | err = pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
55111428 SR |
1951 | if (err) |
1952 | fw_error("pci_set_power_state failed with %d\n", err); | |
2aef469a KH |
1953 | |
1954 | return 0; | |
1955 | } | |
1956 | ||
1957 | static int pci_resume(struct pci_dev *pdev) | |
1958 | { | |
1959 | struct fw_ohci *ohci = pci_get_drvdata(pdev); | |
1960 | int err; | |
1961 | ||
1962 | pci_set_power_state(pdev, PCI_D0); | |
1963 | pci_restore_state(pdev); | |
1964 | err = pci_enable_device(pdev); | |
1965 | if (err) { | |
8a8cea27 | 1966 | fw_error("pci_enable_device failed\n"); |
2aef469a KH |
1967 | return err; |
1968 | } | |
1969 | ||
1970 | return ohci_enable(&ohci->card, ohci->config_rom, CONFIG_ROM_SIZE); | |
1971 | } | |
1972 | #endif | |
1973 | ||
ed568912 KH |
1974 | static struct pci_device_id pci_table[] = { |
1975 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, | |
1976 | { } | |
1977 | }; | |
1978 | ||
1979 | MODULE_DEVICE_TABLE(pci, pci_table); | |
1980 | ||
1981 | static struct pci_driver fw_ohci_pci_driver = { | |
1982 | .name = ohci_driver_name, | |
1983 | .id_table = pci_table, | |
1984 | .probe = pci_probe, | |
1985 | .remove = pci_remove, | |
2aef469a KH |
1986 | #ifdef CONFIG_PM |
1987 | .resume = pci_resume, | |
1988 | .suspend = pci_suspend, | |
1989 | #endif | |
ed568912 KH |
1990 | }; |
1991 | ||
1992 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
1993 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
1994 | MODULE_LICENSE("GPL"); | |
1995 | ||
1e4c7b0d OH |
1996 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1997 | #ifndef CONFIG_IEEE1394_OHCI1394_MODULE | |
1998 | MODULE_ALIAS("ohci1394"); | |
1999 | #endif | |
2000 | ||
ed568912 KH |
2001 | static int __init fw_ohci_init(void) |
2002 | { | |
2003 | return pci_register_driver(&fw_ohci_pci_driver); | |
2004 | } | |
2005 | ||
2006 | static void __exit fw_ohci_cleanup(void) | |
2007 | { | |
2008 | pci_unregister_driver(&fw_ohci_pci_driver); | |
2009 | } | |
2010 | ||
2011 | module_init(fw_ohci_init); | |
2012 | module_exit(fw_ohci_cleanup); |