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ed568912 KH |
1 | /* -*- c-basic-offset: 8 -*- |
2 | * | |
3 | * fw-ohci.c - Driver for OHCI 1394 boards | |
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 AM |
28 | #include <linux/dma-mapping.h> |
29 | ||
ed568912 KH |
30 | #include <asm/uaccess.h> |
31 | #include <asm/semaphore.h> | |
32 | ||
33 | #include "fw-transaction.h" | |
34 | #include "fw-ohci.h" | |
35 | ||
36 | #define descriptor_output_more 0 | |
37 | #define descriptor_output_last (1 << 12) | |
38 | #define descriptor_input_more (2 << 12) | |
39 | #define descriptor_input_last (3 << 12) | |
40 | #define descriptor_status (1 << 11) | |
41 | #define descriptor_key_immediate (2 << 8) | |
42 | #define descriptor_ping (1 << 7) | |
43 | #define descriptor_yy (1 << 6) | |
44 | #define descriptor_no_irq (0 << 4) | |
45 | #define descriptor_irq_error (1 << 4) | |
46 | #define descriptor_irq_always (3 << 4) | |
47 | #define descriptor_branch_always (3 << 2) | |
48 | ||
49 | struct descriptor { | |
50 | __le16 req_count; | |
51 | __le16 control; | |
52 | __le32 data_address; | |
53 | __le32 branch_address; | |
54 | __le16 res_count; | |
55 | __le16 transfer_status; | |
56 | } __attribute__((aligned(16))); | |
57 | ||
72e318e0 KH |
58 | #define control_set(regs) (regs) |
59 | #define control_clear(regs) ((regs) + 4) | |
60 | #define command_ptr(regs) ((regs) + 12) | |
61 | #define context_match(regs) ((regs) + 16) | |
62 | ||
32b46093 | 63 | struct ar_buffer { |
ed568912 | 64 | struct descriptor descriptor; |
32b46093 KH |
65 | struct ar_buffer *next; |
66 | __le32 data[0]; | |
67 | }; | |
ed568912 | 68 | |
32b46093 KH |
69 | struct ar_context { |
70 | struct fw_ohci *ohci; | |
71 | struct ar_buffer *current_buffer; | |
72 | struct ar_buffer *last_buffer; | |
73 | void *pointer; | |
72e318e0 | 74 | u32 regs; |
ed568912 KH |
75 | struct tasklet_struct tasklet; |
76 | }; | |
77 | ||
78 | struct at_context { | |
79 | struct fw_ohci *ohci; | |
80 | dma_addr_t descriptor_bus; | |
81 | dma_addr_t buffer_bus; | |
730c32f5 | 82 | struct fw_packet *current_packet; |
ed568912 KH |
83 | |
84 | struct list_head list; | |
85 | ||
86 | struct { | |
87 | struct descriptor more; | |
88 | __le32 header[4]; | |
89 | struct descriptor last; | |
90 | } d; | |
91 | ||
72e318e0 | 92 | u32 regs; |
ed568912 KH |
93 | |
94 | struct tasklet_struct tasklet; | |
95 | }; | |
96 | ||
97 | #define it_header_sy(v) ((v) << 0) | |
98 | #define it_header_tcode(v) ((v) << 4) | |
99 | #define it_header_channel(v) ((v) << 8) | |
100 | #define it_header_tag(v) ((v) << 14) | |
101 | #define it_header_speed(v) ((v) << 16) | |
102 | #define it_header_data_length(v) ((v) << 16) | |
103 | ||
104 | struct iso_context { | |
105 | struct fw_iso_context base; | |
106 | struct tasklet_struct tasklet; | |
72e318e0 | 107 | u32 regs; |
ed568912 KH |
108 | |
109 | struct descriptor *buffer; | |
110 | dma_addr_t buffer_bus; | |
111 | struct descriptor *head_descriptor; | |
112 | struct descriptor *tail_descriptor; | |
113 | struct descriptor *tail_descriptor_last; | |
114 | struct descriptor *prev_descriptor; | |
115 | }; | |
116 | ||
117 | #define CONFIG_ROM_SIZE 1024 | |
118 | ||
119 | struct fw_ohci { | |
120 | struct fw_card card; | |
121 | ||
122 | __iomem char *registers; | |
123 | dma_addr_t self_id_bus; | |
124 | __le32 *self_id_cpu; | |
125 | struct tasklet_struct bus_reset_tasklet; | |
e636fe25 | 126 | int node_id; |
ed568912 KH |
127 | int generation; |
128 | int request_generation; | |
129 | ||
130 | /* Spinlock for accessing fw_ohci data. Never call out of | |
131 | * this driver with this lock held. */ | |
132 | spinlock_t lock; | |
133 | u32 self_id_buffer[512]; | |
134 | ||
135 | /* Config rom buffers */ | |
136 | __be32 *config_rom; | |
137 | dma_addr_t config_rom_bus; | |
138 | __be32 *next_config_rom; | |
139 | dma_addr_t next_config_rom_bus; | |
140 | u32 next_header; | |
141 | ||
142 | struct ar_context ar_request_ctx; | |
143 | struct ar_context ar_response_ctx; | |
144 | struct at_context at_request_ctx; | |
145 | struct at_context at_response_ctx; | |
146 | ||
147 | u32 it_context_mask; | |
148 | struct iso_context *it_context_list; | |
149 | u32 ir_context_mask; | |
150 | struct iso_context *ir_context_list; | |
151 | }; | |
152 | ||
95688e97 | 153 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
ed568912 KH |
154 | { |
155 | return container_of(card, struct fw_ohci, card); | |
156 | } | |
157 | ||
158 | #define CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 | |
159 | ||
160 | #define CONTEXT_RUN 0x8000 | |
161 | #define CONTEXT_WAKE 0x1000 | |
162 | #define CONTEXT_DEAD 0x0800 | |
163 | #define CONTEXT_ACTIVE 0x0400 | |
164 | ||
165 | #define OHCI1394_MAX_AT_REQ_RETRIES 0x2 | |
166 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 | |
167 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 | |
168 | ||
169 | #define FW_OHCI_MAJOR 240 | |
170 | #define OHCI1394_REGISTER_SIZE 0x800 | |
171 | #define OHCI_LOOP_COUNT 500 | |
172 | #define OHCI1394_PCI_HCI_Control 0x40 | |
173 | #define SELF_ID_BUF_SIZE 0x800 | |
32b46093 | 174 | #define OHCI_TCODE_PHY_PACKET 0x0e |
0edeefd9 | 175 | |
ed568912 KH |
176 | static char ohci_driver_name[] = KBUILD_MODNAME; |
177 | ||
95688e97 | 178 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
ed568912 KH |
179 | { |
180 | writel(data, ohci->registers + offset); | |
181 | } | |
182 | ||
95688e97 | 183 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
ed568912 KH |
184 | { |
185 | return readl(ohci->registers + offset); | |
186 | } | |
187 | ||
95688e97 | 188 | static inline void flush_writes(const struct fw_ohci *ohci) |
ed568912 KH |
189 | { |
190 | /* Do a dummy read to flush writes. */ | |
191 | reg_read(ohci, OHCI1394_Version); | |
192 | } | |
193 | ||
194 | static int | |
195 | ohci_update_phy_reg(struct fw_card *card, int addr, | |
196 | int clear_bits, int set_bits) | |
197 | { | |
198 | struct fw_ohci *ohci = fw_ohci(card); | |
199 | u32 val, old; | |
200 | ||
201 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); | |
202 | msleep(2); | |
203 | val = reg_read(ohci, OHCI1394_PhyControl); | |
204 | if ((val & OHCI1394_PhyControl_ReadDone) == 0) { | |
205 | fw_error("failed to set phy reg bits.\n"); | |
206 | return -EBUSY; | |
207 | } | |
208 | ||
209 | old = OHCI1394_PhyControl_ReadData(val); | |
210 | old = (old & ~clear_bits) | set_bits; | |
211 | reg_write(ohci, OHCI1394_PhyControl, | |
212 | OHCI1394_PhyControl_Write(addr, old)); | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
32b46093 | 217 | static int ar_context_add_page(struct ar_context *ctx) |
ed568912 | 218 | { |
32b46093 KH |
219 | struct device *dev = ctx->ohci->card.device; |
220 | struct ar_buffer *ab; | |
221 | dma_addr_t ab_bus; | |
222 | size_t offset; | |
223 | ||
224 | ab = (struct ar_buffer *) __get_free_page(GFP_ATOMIC); | |
225 | if (ab == NULL) | |
226 | return -ENOMEM; | |
227 | ||
228 | ab_bus = dma_map_single(dev, ab, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
229 | if (dma_mapping_error(ab_bus)) { | |
230 | free_page((unsigned long) ab); | |
231 | return -ENOMEM; | |
232 | } | |
233 | ||
234 | memset(&ab->descriptor, 0, sizeof ab->descriptor); | |
235 | ab->descriptor.control = cpu_to_le16(descriptor_input_more | | |
236 | descriptor_status | | |
237 | descriptor_branch_always); | |
238 | offset = offsetof(struct ar_buffer, data); | |
239 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); | |
240 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); | |
241 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); | |
242 | ab->descriptor.branch_address = 0; | |
243 | ||
244 | dma_sync_single_for_device(dev, ab_bus, PAGE_SIZE, DMA_BIDIRECTIONAL); | |
245 | ||
246 | ctx->last_buffer->descriptor.branch_address = ab_bus | 1; | |
247 | ctx->last_buffer->next = ab; | |
248 | ctx->last_buffer = ab; | |
249 | ||
72e318e0 | 250 | reg_write(ctx->ohci, control_set(ctx->regs), CONTEXT_WAKE); |
ed568912 | 251 | flush_writes(ctx->ohci); |
32b46093 KH |
252 | |
253 | return 0; | |
ed568912 KH |
254 | } |
255 | ||
32b46093 | 256 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 257 | { |
ed568912 | 258 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
259 | struct fw_packet p; |
260 | u32 status, length, tcode; | |
2639a6fb | 261 | |
32b46093 KH |
262 | p.header[0] = le32_to_cpu(buffer[0]); |
263 | p.header[1] = le32_to_cpu(buffer[1]); | |
264 | p.header[2] = le32_to_cpu(buffer[2]); | |
2639a6fb KH |
265 | |
266 | tcode = (p.header[0] >> 4) & 0x0f; | |
267 | switch (tcode) { | |
268 | case TCODE_WRITE_QUADLET_REQUEST: | |
269 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 270 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 271 | p.header_length = 16; |
32b46093 | 272 | p.payload_length = 0; |
2639a6fb KH |
273 | break; |
274 | ||
2639a6fb | 275 | case TCODE_READ_BLOCK_REQUEST : |
32b46093 KH |
276 | p.header[3] = le32_to_cpu(buffer[3]); |
277 | p.header_length = 16; | |
278 | p.payload_length = 0; | |
279 | break; | |
280 | ||
281 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
282 | case TCODE_READ_BLOCK_RESPONSE: |
283 | case TCODE_LOCK_REQUEST: | |
284 | case TCODE_LOCK_RESPONSE: | |
32b46093 | 285 | p.header[3] = le32_to_cpu(buffer[3]); |
2639a6fb | 286 | p.header_length = 16; |
32b46093 | 287 | p.payload_length = p.header[3] >> 16; |
2639a6fb KH |
288 | break; |
289 | ||
290 | case TCODE_WRITE_RESPONSE: | |
291 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 292 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 293 | p.header_length = 12; |
32b46093 | 294 | p.payload_length = 0; |
2639a6fb KH |
295 | break; |
296 | } | |
ed568912 | 297 | |
32b46093 KH |
298 | p.payload = (void *) buffer + p.header_length; |
299 | ||
300 | /* FIXME: What to do about evt_* errors? */ | |
301 | length = (p.header_length + p.payload_length + 3) / 4; | |
302 | status = le32_to_cpu(buffer[length]); | |
303 | ||
304 | p.ack = ((status >> 16) & 0x1f) - 16; | |
305 | p.speed = (status >> 21) & 0x7; | |
306 | p.timestamp = status & 0xffff; | |
307 | p.generation = ohci->request_generation; | |
ed568912 KH |
308 | |
309 | /* The OHCI bus reset handler synthesizes a phy packet with | |
310 | * the new generation number when a bus reset happens (see | |
311 | * section 8.4.2.3). This helps us determine when a request | |
312 | * was received and make sure we send the response in the same | |
313 | * generation. We only need this for requests; for responses | |
314 | * we use the unique tlabel for finding the matching | |
315 | * request. */ | |
316 | ||
2639a6fb | 317 | if (p.ack + 16 == 0x09) |
32b46093 | 318 | ohci->request_generation = (buffer[2] >> 16) & 0xff; |
ed568912 | 319 | else if (ctx == &ohci->ar_request_ctx) |
2639a6fb | 320 | fw_core_handle_request(&ohci->card, &p); |
ed568912 | 321 | else |
2639a6fb | 322 | fw_core_handle_response(&ohci->card, &p); |
ed568912 | 323 | |
32b46093 KH |
324 | return buffer + length + 1; |
325 | } | |
ed568912 | 326 | |
32b46093 KH |
327 | static void ar_context_tasklet(unsigned long data) |
328 | { | |
329 | struct ar_context *ctx = (struct ar_context *)data; | |
330 | struct fw_ohci *ohci = ctx->ohci; | |
331 | struct ar_buffer *ab; | |
332 | struct descriptor *d; | |
333 | void *buffer, *end; | |
334 | ||
335 | ab = ctx->current_buffer; | |
336 | d = &ab->descriptor; | |
337 | ||
338 | if (d->res_count == 0) { | |
339 | size_t size, rest, offset; | |
340 | ||
341 | /* This descriptor is finished and we may have a | |
342 | * packet split across this and the next buffer. We | |
343 | * reuse the page for reassembling the split packet. */ | |
344 | ||
345 | offset = offsetof(struct ar_buffer, data); | |
346 | dma_unmap_single(ohci->card.device, | |
347 | ab->descriptor.data_address - offset, | |
348 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
349 | ||
350 | buffer = ab; | |
351 | ab = ab->next; | |
352 | d = &ab->descriptor; | |
353 | size = buffer + PAGE_SIZE - ctx->pointer; | |
354 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); | |
355 | memmove(buffer, ctx->pointer, size); | |
356 | memcpy(buffer + size, ab->data, rest); | |
357 | ctx->current_buffer = ab; | |
358 | ctx->pointer = (void *) ab->data + rest; | |
359 | end = buffer + size + rest; | |
360 | ||
361 | while (buffer < end) | |
362 | buffer = handle_ar_packet(ctx, buffer); | |
363 | ||
364 | free_page((unsigned long)buffer); | |
365 | ar_context_add_page(ctx); | |
366 | } else { | |
367 | buffer = ctx->pointer; | |
368 | ctx->pointer = end = | |
369 | (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); | |
370 | ||
371 | while (buffer < end) | |
372 | buffer = handle_ar_packet(ctx, buffer); | |
373 | } | |
ed568912 KH |
374 | } |
375 | ||
376 | static int | |
72e318e0 | 377 | ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 regs) |
ed568912 | 378 | { |
32b46093 | 379 | struct ar_buffer ab; |
ed568912 | 380 | |
72e318e0 KH |
381 | ctx->regs = regs; |
382 | ctx->ohci = ohci; | |
383 | ctx->last_buffer = &ab; | |
ed568912 KH |
384 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
385 | ||
32b46093 KH |
386 | ar_context_add_page(ctx); |
387 | ar_context_add_page(ctx); | |
388 | ctx->current_buffer = ab.next; | |
389 | ctx->pointer = ctx->current_buffer->data; | |
390 | ||
72e318e0 KH |
391 | reg_write(ctx->ohci, command_ptr(ctx->regs), ab.descriptor.branch_address); |
392 | reg_write(ctx->ohci, control_set(ctx->regs), CONTEXT_RUN); | |
32b46093 | 393 | flush_writes(ctx->ohci); |
ed568912 KH |
394 | |
395 | return 0; | |
396 | } | |
397 | ||
398 | static void | |
399 | do_packet_callbacks(struct fw_ohci *ohci, struct list_head *list) | |
400 | { | |
401 | struct fw_packet *p, *next; | |
402 | ||
403 | list_for_each_entry_safe(p, next, list, link) | |
2639a6fb | 404 | p->callback(p, &ohci->card, p->ack); |
ed568912 KH |
405 | } |
406 | ||
407 | static void | |
408 | complete_transmission(struct fw_packet *packet, | |
2639a6fb | 409 | int ack, struct list_head *list) |
ed568912 KH |
410 | { |
411 | list_move_tail(&packet->link, list); | |
2639a6fb | 412 | packet->ack = ack; |
ed568912 KH |
413 | } |
414 | ||
415 | /* This function prepares the first packet in the context queue for | |
416 | * transmission. Must always be called with the ochi->lock held to | |
417 | * ensure proper generation handling and locking around packet queue | |
418 | * manipulation. */ | |
419 | static void | |
420 | at_context_setup_packet(struct at_context *ctx, struct list_head *list) | |
421 | { | |
422 | struct fw_packet *packet; | |
423 | struct fw_ohci *ohci = ctx->ohci; | |
424 | int z, tcode; | |
425 | ||
426 | packet = fw_packet(ctx->list.next); | |
427 | ||
428 | memset(&ctx->d, 0, sizeof ctx->d); | |
429 | if (packet->payload_length > 0) { | |
430 | packet->payload_bus = dma_map_single(ohci->card.device, | |
431 | packet->payload, | |
432 | packet->payload_length, | |
433 | DMA_TO_DEVICE); | |
82eff9db | 434 | if (dma_mapping_error(packet->payload_bus)) { |
e5f49c3b | 435 | complete_transmission(packet, RCODE_SEND_ERROR, list); |
ed568912 KH |
436 | return; |
437 | } | |
438 | ||
439 | ctx->d.more.control = | |
440 | cpu_to_le16(descriptor_output_more | | |
441 | descriptor_key_immediate); | |
442 | ctx->d.more.req_count = cpu_to_le16(packet->header_length); | |
443 | ctx->d.more.res_count = cpu_to_le16(packet->timestamp); | |
444 | ctx->d.last.control = | |
445 | cpu_to_le16(descriptor_output_last | | |
446 | descriptor_irq_always | | |
447 | descriptor_branch_always); | |
448 | ctx->d.last.req_count = cpu_to_le16(packet->payload_length); | |
449 | ctx->d.last.data_address = cpu_to_le32(packet->payload_bus); | |
450 | z = 3; | |
451 | } else { | |
452 | ctx->d.more.control = | |
453 | cpu_to_le16(descriptor_output_last | | |
454 | descriptor_key_immediate | | |
455 | descriptor_irq_always | | |
456 | descriptor_branch_always); | |
457 | ctx->d.more.req_count = cpu_to_le16(packet->header_length); | |
458 | ctx->d.more.res_count = cpu_to_le16(packet->timestamp); | |
459 | z = 2; | |
460 | } | |
461 | ||
462 | /* The DMA format for asyncronous link packets is different | |
463 | * from the IEEE1394 layout, so shift the fields around | |
464 | * accordingly. If header_length is 8, it's a PHY packet, to | |
465 | * which we need to prepend an extra quadlet. */ | |
466 | if (packet->header_length > 8) { | |
467 | ctx->d.header[0] = cpu_to_le32((packet->header[0] & 0xffff) | | |
468 | (packet->speed << 16)); | |
469 | ctx->d.header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
470 | (packet->header[0] & 0xffff0000)); | |
471 | ctx->d.header[2] = cpu_to_le32(packet->header[2]); | |
472 | ||
473 | tcode = (packet->header[0] >> 4) & 0x0f; | |
474 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
475 | ctx->d.header[3] = cpu_to_le32(packet->header[3]); | |
476 | else | |
477 | ctx->d.header[3] = packet->header[3]; | |
478 | } else { | |
479 | ctx->d.header[0] = | |
480 | cpu_to_le32((OHCI1394_phy_tcode << 4) | | |
481 | (packet->speed << 16)); | |
482 | ctx->d.header[1] = cpu_to_le32(packet->header[0]); | |
483 | ctx->d.header[2] = cpu_to_le32(packet->header[1]); | |
484 | ctx->d.more.req_count = cpu_to_le16(12); | |
485 | } | |
486 | ||
487 | /* FIXME: Document how the locking works. */ | |
488 | if (ohci->generation == packet->generation) { | |
72e318e0 | 489 | reg_write(ctx->ohci, command_ptr(ctx->regs), |
ed568912 | 490 | ctx->descriptor_bus | z); |
72e318e0 | 491 | reg_write(ctx->ohci, control_set(ctx->regs), |
ed568912 | 492 | CONTEXT_RUN | CONTEXT_WAKE); |
730c32f5 | 493 | ctx->current_packet = packet; |
ed568912 KH |
494 | } else { |
495 | /* We dont return error codes from this function; all | |
496 | * transmission errors are reported through the | |
497 | * callback. */ | |
e5f49c3b | 498 | complete_transmission(packet, RCODE_GENERATION, list); |
ed568912 KH |
499 | } |
500 | } | |
501 | ||
502 | static void at_context_stop(struct at_context *ctx) | |
503 | { | |
504 | u32 reg; | |
505 | ||
72e318e0 | 506 | reg_write(ctx->ohci, control_clear(ctx->regs), CONTEXT_RUN); |
ed568912 | 507 | |
72e318e0 | 508 | reg = reg_read(ctx->ohci, control_set(ctx->regs)); |
ed568912 KH |
509 | if (reg & CONTEXT_ACTIVE) |
510 | fw_notify("Tried to stop context, but it is still active " | |
511 | "(0x%08x).\n", reg); | |
512 | } | |
513 | ||
514 | static void at_context_tasklet(unsigned long data) | |
515 | { | |
516 | struct at_context *ctx = (struct at_context *)data; | |
517 | struct fw_ohci *ohci = ctx->ohci; | |
518 | struct fw_packet *packet; | |
519 | LIST_HEAD(list); | |
520 | unsigned long flags; | |
521 | int evt; | |
522 | ||
523 | spin_lock_irqsave(&ohci->lock, flags); | |
524 | ||
525 | packet = fw_packet(ctx->list.next); | |
526 | ||
527 | at_context_stop(ctx); | |
528 | ||
730c32f5 KH |
529 | /* If the head of the list isn't the packet that just got |
530 | * transmitted, the packet got cancelled before we finished | |
531 | * transmitting it. */ | |
532 | if (ctx->current_packet != packet) | |
533 | goto skip_to_next; | |
534 | ||
ed568912 KH |
535 | if (packet->payload_length > 0) { |
536 | dma_unmap_single(ohci->card.device, packet->payload_bus, | |
537 | packet->payload_length, DMA_TO_DEVICE); | |
538 | evt = le16_to_cpu(ctx->d.last.transfer_status) & 0x1f; | |
539 | packet->timestamp = le16_to_cpu(ctx->d.last.res_count); | |
540 | } | |
541 | else { | |
542 | evt = le16_to_cpu(ctx->d.more.transfer_status) & 0x1f; | |
543 | packet->timestamp = le16_to_cpu(ctx->d.more.res_count); | |
544 | } | |
545 | ||
546 | if (evt < 16) { | |
547 | switch (evt) { | |
548 | case OHCI1394_evt_timeout: | |
549 | /* Async response transmit timed out. */ | |
e5f49c3b | 550 | complete_transmission(packet, RCODE_CANCELLED, &list); |
ed568912 KH |
551 | break; |
552 | ||
553 | case OHCI1394_evt_flushed: | |
554 | /* The packet was flushed should give same | |
555 | * error as when we try to use a stale | |
556 | * generation count. */ | |
e5f49c3b KH |
557 | complete_transmission(packet, |
558 | RCODE_GENERATION, &list); | |
ed568912 KH |
559 | break; |
560 | ||
561 | case OHCI1394_evt_missing_ack: | |
e5f49c3b KH |
562 | /* Using a valid (current) generation count, |
563 | * but the node is not on the bus or not | |
564 | * sending acks. */ | |
565 | complete_transmission(packet, RCODE_NO_ACK, &list); | |
ed568912 KH |
566 | break; |
567 | ||
568 | default: | |
e5f49c3b | 569 | complete_transmission(packet, RCODE_SEND_ERROR, &list); |
ed568912 KH |
570 | break; |
571 | } | |
572 | } else | |
573 | complete_transmission(packet, evt - 16, &list); | |
574 | ||
730c32f5 | 575 | skip_to_next: |
ed568912 KH |
576 | /* If more packets are queued, set up the next one. */ |
577 | if (!list_empty(&ctx->list)) | |
578 | at_context_setup_packet(ctx, &list); | |
579 | ||
580 | spin_unlock_irqrestore(&ohci->lock, flags); | |
581 | ||
582 | do_packet_callbacks(ohci, &list); | |
583 | } | |
584 | ||
585 | static int | |
72e318e0 | 586 | at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 regs) |
ed568912 KH |
587 | { |
588 | INIT_LIST_HEAD(&ctx->list); | |
589 | ||
590 | ctx->descriptor_bus = | |
591 | dma_map_single(ohci->card.device, &ctx->d, | |
592 | sizeof ctx->d, DMA_TO_DEVICE); | |
82eff9db | 593 | if (dma_mapping_error(ctx->descriptor_bus)) |
ed568912 KH |
594 | return -ENOMEM; |
595 | ||
72e318e0 KH |
596 | ctx->regs = regs; |
597 | ctx->ohci = ohci; | |
ed568912 KH |
598 | |
599 | tasklet_init(&ctx->tasklet, at_context_tasklet, (unsigned long)ctx); | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
e636fe25 | 604 | #define header_get_destination(q) (((q) >> 16) & 0xffff) |
93c4cceb KH |
605 | #define header_get_tcode(q) (((q) >> 4) & 0x0f) |
606 | #define header_get_offset_high(q) (((q) >> 0) & 0xffff) | |
607 | #define header_get_data_length(q) (((q) >> 16) & 0xffff) | |
608 | #define header_get_extended_tcode(q) (((q) >> 0) & 0xffff) | |
609 | ||
610 | static void | |
611 | handle_local_rom(struct fw_ohci *ohci, struct fw_packet *packet, u32 csr) | |
612 | { | |
613 | struct fw_packet response; | |
614 | int tcode, length, i; | |
615 | ||
616 | tcode = header_get_tcode(packet->header[0]); | |
617 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
618 | length = header_get_data_length(packet->header[3]); | |
619 | else | |
620 | length = 4; | |
621 | ||
622 | i = csr - CSR_CONFIG_ROM; | |
623 | if (i + length > CONFIG_ROM_SIZE) { | |
624 | fw_fill_response(&response, packet->header, | |
625 | RCODE_ADDRESS_ERROR, NULL, 0); | |
626 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
627 | fw_fill_response(&response, packet->header, | |
628 | RCODE_TYPE_ERROR, NULL, 0); | |
629 | } else { | |
630 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
631 | (void *) ohci->config_rom + i, length); | |
632 | } | |
633 | ||
634 | fw_core_handle_response(&ohci->card, &response); | |
635 | } | |
636 | ||
637 | static void | |
638 | handle_local_lock(struct fw_ohci *ohci, struct fw_packet *packet, u32 csr) | |
639 | { | |
640 | struct fw_packet response; | |
641 | int tcode, length, ext_tcode, sel; | |
642 | __be32 *payload, lock_old; | |
643 | u32 lock_arg, lock_data; | |
644 | ||
645 | tcode = header_get_tcode(packet->header[0]); | |
646 | length = header_get_data_length(packet->header[3]); | |
647 | payload = packet->payload; | |
648 | ext_tcode = header_get_extended_tcode(packet->header[3]); | |
649 | ||
650 | if (tcode == TCODE_LOCK_REQUEST && | |
651 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
652 | lock_arg = be32_to_cpu(payload[0]); | |
653 | lock_data = be32_to_cpu(payload[1]); | |
654 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
655 | lock_arg = 0; | |
656 | lock_data = 0; | |
657 | } else { | |
658 | fw_fill_response(&response, packet->header, | |
659 | RCODE_TYPE_ERROR, NULL, 0); | |
660 | goto out; | |
661 | } | |
662 | ||
663 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
664 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
665 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
666 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
667 | ||
668 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) | |
669 | lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData)); | |
670 | else | |
671 | fw_notify("swap not done yet\n"); | |
672 | ||
673 | fw_fill_response(&response, packet->header, | |
674 | RCODE_COMPLETE, &lock_old, sizeof lock_old); | |
675 | out: | |
676 | fw_core_handle_response(&ohci->card, &response); | |
677 | } | |
678 | ||
679 | static void | |
680 | handle_local_request(struct at_context *ctx, struct fw_packet *packet) | |
681 | { | |
682 | u64 offset; | |
683 | u32 csr; | |
684 | ||
685 | packet->ack = ACK_PENDING; | |
686 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
687 | ||
688 | offset = | |
689 | ((unsigned long long) | |
690 | header_get_offset_high(packet->header[1]) << 32) | | |
691 | packet->header[2]; | |
692 | csr = offset - CSR_REGISTER_BASE; | |
693 | ||
694 | /* Handle config rom reads. */ | |
695 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
696 | handle_local_rom(ctx->ohci, packet, csr); | |
697 | else switch (csr) { | |
698 | case CSR_BUS_MANAGER_ID: | |
699 | case CSR_BANDWIDTH_AVAILABLE: | |
700 | case CSR_CHANNELS_AVAILABLE_HI: | |
701 | case CSR_CHANNELS_AVAILABLE_LO: | |
702 | handle_local_lock(ctx->ohci, packet, csr); | |
703 | break; | |
704 | default: | |
705 | if (ctx == &ctx->ohci->at_request_ctx) | |
706 | fw_core_handle_request(&ctx->ohci->card, packet); | |
707 | else | |
708 | fw_core_handle_response(&ctx->ohci->card, packet); | |
709 | break; | |
710 | } | |
711 | } | |
e636fe25 | 712 | |
ed568912 KH |
713 | static void |
714 | at_context_transmit(struct at_context *ctx, struct fw_packet *packet) | |
715 | { | |
716 | LIST_HEAD(list); | |
717 | unsigned long flags; | |
ed568912 KH |
718 | |
719 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
720 | ||
e636fe25 KH |
721 | if (header_get_destination(packet->header[0]) == ctx->ohci->node_id && |
722 | ctx->ohci->generation == packet->generation) { | |
93c4cceb KH |
723 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
724 | handle_local_request(ctx, packet); | |
725 | return; | |
e636fe25 | 726 | } |
ed568912 | 727 | |
93c4cceb KH |
728 | list_add_tail(&packet->link, &ctx->list); |
729 | if (ctx->list.next == &packet->link) | |
730 | at_context_setup_packet(ctx, &list); | |
731 | ||
ed568912 KH |
732 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
733 | ||
734 | do_packet_callbacks(ctx->ohci, &list); | |
735 | } | |
736 | ||
737 | static void bus_reset_tasklet(unsigned long data) | |
738 | { | |
739 | struct fw_ohci *ohci = (struct fw_ohci *)data; | |
e636fe25 | 740 | int self_id_count, i, j, reg; |
ed568912 KH |
741 | int generation, new_generation; |
742 | unsigned long flags; | |
743 | ||
744 | reg = reg_read(ohci, OHCI1394_NodeID); | |
745 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
746 | fw_error("node ID not valid, new bus reset in progress\n"); | |
747 | return; | |
748 | } | |
e636fe25 | 749 | ohci->node_id = reg & 0xffff; |
ed568912 KH |
750 | |
751 | /* The count in the SelfIDCount register is the number of | |
752 | * bytes in the self ID receive buffer. Since we also receive | |
753 | * the inverted quadlets and a header quadlet, we shift one | |
754 | * bit extra to get the actual number of self IDs. */ | |
755 | ||
756 | self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff; | |
757 | generation = (le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; | |
758 | ||
759 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
760 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) | |
761 | fw_error("inconsistent self IDs\n"); | |
762 | ohci->self_id_buffer[j] = le32_to_cpu(ohci->self_id_cpu[i]); | |
763 | } | |
764 | ||
765 | /* Check the consistency of the self IDs we just read. The | |
766 | * problem we face is that a new bus reset can start while we | |
767 | * read out the self IDs from the DMA buffer. If this happens, | |
768 | * the DMA buffer will be overwritten with new self IDs and we | |
769 | * will read out inconsistent data. The OHCI specification | |
770 | * (section 11.2) recommends a technique similar to | |
771 | * linux/seqlock.h, where we remember the generation of the | |
772 | * self IDs in the buffer before reading them out and compare | |
773 | * it to the current generation after reading them out. If | |
774 | * the two generations match we know we have a consistent set | |
775 | * of self IDs. */ | |
776 | ||
777 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
778 | if (new_generation != generation) { | |
779 | fw_notify("recursive bus reset detected, " | |
780 | "discarding self ids\n"); | |
781 | return; | |
782 | } | |
783 | ||
784 | /* FIXME: Document how the locking works. */ | |
785 | spin_lock_irqsave(&ohci->lock, flags); | |
786 | ||
787 | ohci->generation = generation; | |
788 | at_context_stop(&ohci->at_request_ctx); | |
789 | at_context_stop(&ohci->at_response_ctx); | |
790 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); | |
791 | ||
792 | /* This next bit is unrelated to the AT context stuff but we | |
793 | * have to do it under the spinlock also. If a new config rom | |
794 | * was set up before this reset, the old one is now no longer | |
795 | * in use and we can free it. Update the config rom pointers | |
796 | * to point to the current config rom and clear the | |
797 | * next_config_rom pointer so a new udpate can take place. */ | |
798 | ||
799 | if (ohci->next_config_rom != NULL) { | |
800 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
801 | ohci->config_rom, ohci->config_rom_bus); | |
802 | ohci->config_rom = ohci->next_config_rom; | |
803 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
804 | ohci->next_config_rom = NULL; | |
805 | ||
806 | /* Restore config_rom image and manually update | |
807 | * config_rom registers. Writing the header quadlet | |
808 | * will indicate that the config rom is ready, so we | |
809 | * do that last. */ | |
810 | reg_write(ohci, OHCI1394_BusOptions, | |
811 | be32_to_cpu(ohci->config_rom[2])); | |
812 | ohci->config_rom[0] = cpu_to_be32(ohci->next_header); | |
813 | reg_write(ohci, OHCI1394_ConfigROMhdr, ohci->next_header); | |
814 | } | |
815 | ||
816 | spin_unlock_irqrestore(&ohci->lock, flags); | |
817 | ||
e636fe25 | 818 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
ed568912 KH |
819 | self_id_count, ohci->self_id_buffer); |
820 | } | |
821 | ||
822 | static irqreturn_t irq_handler(int irq, void *data) | |
823 | { | |
824 | struct fw_ohci *ohci = data; | |
825 | u32 event, iso_event; | |
826 | int i; | |
827 | ||
828 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
829 | ||
830 | if (!event) | |
831 | return IRQ_NONE; | |
832 | ||
833 | reg_write(ohci, OHCI1394_IntEventClear, event); | |
834 | ||
835 | if (event & OHCI1394_selfIDComplete) | |
836 | tasklet_schedule(&ohci->bus_reset_tasklet); | |
837 | ||
838 | if (event & OHCI1394_RQPkt) | |
839 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
840 | ||
841 | if (event & OHCI1394_RSPkt) | |
842 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
843 | ||
844 | if (event & OHCI1394_reqTxComplete) | |
845 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
846 | ||
847 | if (event & OHCI1394_respTxComplete) | |
848 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
849 | ||
850 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventSet); | |
851 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); | |
852 | ||
853 | while (iso_event) { | |
854 | i = ffs(iso_event) - 1; | |
855 | tasklet_schedule(&ohci->ir_context_list[i].tasklet); | |
856 | iso_event &= ~(1 << i); | |
857 | } | |
858 | ||
859 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventSet); | |
860 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); | |
861 | ||
862 | while (iso_event) { | |
863 | i = ffs(iso_event) - 1; | |
864 | tasklet_schedule(&ohci->it_context_list[i].tasklet); | |
865 | iso_event &= ~(1 << i); | |
866 | } | |
867 | ||
868 | return IRQ_HANDLED; | |
869 | } | |
870 | ||
871 | static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length) | |
872 | { | |
873 | struct fw_ohci *ohci = fw_ohci(card); | |
874 | struct pci_dev *dev = to_pci_dev(card->device); | |
875 | ||
876 | /* When the link is not yet enabled, the atomic config rom | |
877 | * update mechanism described below in ohci_set_config_rom() | |
878 | * is not active. We have to update ConfigRomHeader and | |
879 | * BusOptions manually, and the write to ConfigROMmap takes | |
880 | * effect immediately. We tie this to the enabling of the | |
881 | * link, so we have a valid config rom before enabling - the | |
882 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
883 | * values before enabling. | |
884 | * | |
885 | * However, when the ConfigROMmap is written, some controllers | |
886 | * always read back quadlets 0 and 2 from the config rom to | |
887 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
888 | * They shouldn't do that in this initial case where the link | |
889 | * isn't enabled. This means we have to use the same | |
890 | * workaround here, setting the bus header to 0 and then write | |
891 | * the right values in the bus reset tasklet. | |
892 | */ | |
893 | ||
894 | ohci->next_config_rom = | |
895 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
896 | &ohci->next_config_rom_bus, GFP_KERNEL); | |
897 | if (ohci->next_config_rom == NULL) | |
898 | return -ENOMEM; | |
899 | ||
900 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); | |
901 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, length * 4); | |
902 | ||
903 | ohci->next_header = config_rom[0]; | |
904 | ohci->next_config_rom[0] = 0; | |
905 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
906 | reg_write(ohci, OHCI1394_BusOptions, config_rom[2]); | |
907 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); | |
908 | ||
909 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
910 | ||
911 | if (request_irq(dev->irq, irq_handler, | |
912 | SA_SHIRQ, ohci_driver_name, ohci)) { | |
913 | fw_error("Failed to allocate shared interrupt %d.\n", | |
914 | dev->irq); | |
915 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
916 | ohci->config_rom, ohci->config_rom_bus); | |
917 | return -EIO; | |
918 | } | |
919 | ||
920 | reg_write(ohci, OHCI1394_HCControlSet, | |
921 | OHCI1394_HCControl_linkEnable | | |
922 | OHCI1394_HCControl_BIBimageValid); | |
923 | flush_writes(ohci); | |
924 | ||
925 | /* We are ready to go, initiate bus reset to finish the | |
926 | * initialization. */ | |
927 | ||
928 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
929 | ||
930 | return 0; | |
931 | } | |
932 | ||
933 | static int | |
934 | ohci_set_config_rom(struct fw_card *card, u32 *config_rom, size_t length) | |
935 | { | |
936 | struct fw_ohci *ohci; | |
937 | unsigned long flags; | |
938 | int retval = 0; | |
939 | __be32 *next_config_rom; | |
940 | dma_addr_t next_config_rom_bus; | |
941 | ||
942 | ohci = fw_ohci(card); | |
943 | ||
944 | /* When the OHCI controller is enabled, the config rom update | |
945 | * mechanism is a bit tricky, but easy enough to use. See | |
946 | * section 5.5.6 in the OHCI specification. | |
947 | * | |
948 | * The OHCI controller caches the new config rom address in a | |
949 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
950 | * for the changes to take place. When the bus reset is | |
951 | * detected, the controller loads the new values for the | |
952 | * ConfigRomHeader and BusOptions registers from the specified | |
953 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
954 | * shadow register. All automatically and atomically. | |
955 | * | |
956 | * Now, there's a twist to this story. The automatic load of | |
957 | * ConfigRomHeader and BusOptions doesn't honor the | |
958 | * noByteSwapData bit, so with a be32 config rom, the | |
959 | * controller will load be32 values in to these registers | |
960 | * during the atomic update, even on litte endian | |
961 | * architectures. The workaround we use is to put a 0 in the | |
962 | * header quadlet; 0 is endian agnostic and means that the | |
963 | * config rom isn't ready yet. In the bus reset tasklet we | |
964 | * then set up the real values for the two registers. | |
965 | * | |
966 | * We use ohci->lock to avoid racing with the code that sets | |
967 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). | |
968 | */ | |
969 | ||
970 | next_config_rom = | |
971 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
972 | &next_config_rom_bus, GFP_KERNEL); | |
973 | if (next_config_rom == NULL) | |
974 | return -ENOMEM; | |
975 | ||
976 | spin_lock_irqsave(&ohci->lock, flags); | |
977 | ||
978 | if (ohci->next_config_rom == NULL) { | |
979 | ohci->next_config_rom = next_config_rom; | |
980 | ohci->next_config_rom_bus = next_config_rom_bus; | |
981 | ||
982 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); | |
983 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, | |
984 | length * 4); | |
985 | ||
986 | ohci->next_header = config_rom[0]; | |
987 | ohci->next_config_rom[0] = 0; | |
988 | ||
989 | reg_write(ohci, OHCI1394_ConfigROMmap, | |
990 | ohci->next_config_rom_bus); | |
991 | } else { | |
992 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
993 | next_config_rom, next_config_rom_bus); | |
994 | retval = -EBUSY; | |
995 | } | |
996 | ||
997 | spin_unlock_irqrestore(&ohci->lock, flags); | |
998 | ||
999 | /* Now initiate a bus reset to have the changes take | |
1000 | * effect. We clean up the old config rom memory and DMA | |
1001 | * mappings in the bus reset tasklet, since the OHCI | |
1002 | * controller could need to access it before the bus reset | |
1003 | * takes effect. */ | |
1004 | if (retval == 0) | |
1005 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
1006 | ||
1007 | return retval; | |
1008 | } | |
1009 | ||
1010 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
1011 | { | |
1012 | struct fw_ohci *ohci = fw_ohci(card); | |
1013 | ||
1014 | at_context_transmit(&ohci->at_request_ctx, packet); | |
1015 | } | |
1016 | ||
1017 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
1018 | { | |
1019 | struct fw_ohci *ohci = fw_ohci(card); | |
1020 | ||
1021 | at_context_transmit(&ohci->at_response_ctx, packet); | |
1022 | } | |
1023 | ||
730c32f5 KH |
1024 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
1025 | { | |
1026 | struct fw_ohci *ohci = fw_ohci(card); | |
1027 | LIST_HEAD(list); | |
1028 | unsigned long flags; | |
1029 | ||
1030 | spin_lock_irqsave(&ohci->lock, flags); | |
1031 | ||
1032 | if (packet->ack == 0) { | |
1033 | fw_notify("cancelling packet %p (header[0]=%08x)\n", | |
1034 | packet, packet->header[0]); | |
1035 | ||
1036 | complete_transmission(packet, RCODE_CANCELLED, &list); | |
1037 | } | |
1038 | ||
1039 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1040 | ||
1041 | do_packet_callbacks(ohci, &list); | |
1042 | ||
1043 | /* Return success if we actually cancelled something. */ | |
1044 | return list_empty(&list) ? -ENOENT : 0; | |
1045 | } | |
1046 | ||
ed568912 KH |
1047 | static int |
1048 | ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation) | |
1049 | { | |
1050 | struct fw_ohci *ohci = fw_ohci(card); | |
1051 | unsigned long flags; | |
907293d7 | 1052 | int n, retval = 0; |
ed568912 | 1053 | |
907293d7 SR |
1054 | /* FIXME: Make sure this bitmask is cleared when we clear the busReset |
1055 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. */ | |
ed568912 KH |
1056 | |
1057 | spin_lock_irqsave(&ohci->lock, flags); | |
1058 | ||
1059 | if (ohci->generation != generation) { | |
1060 | retval = -ESTALE; | |
1061 | goto out; | |
1062 | } | |
1063 | ||
907293d7 SR |
1064 | /* NOTE, if the node ID contains a non-local bus ID, physical DMA is |
1065 | * enabled for _all_ nodes on remote buses. */ | |
1066 | ||
1067 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
1068 | if (n < 32) | |
1069 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
1070 | else | |
1071 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
1072 | ||
ed568912 | 1073 | flush_writes(ohci); |
ed568912 | 1074 | out: |
6cad95fe | 1075 | spin_unlock_irqrestore(&ohci->lock, flags); |
ed568912 KH |
1076 | return retval; |
1077 | } | |
1078 | ||
1079 | static void ir_context_tasklet(unsigned long data) | |
1080 | { | |
1081 | struct iso_context *ctx = (struct iso_context *)data; | |
1082 | ||
1083 | (void)ctx; | |
1084 | } | |
1085 | ||
1086 | #define ISO_BUFFER_SIZE (64 * 1024) | |
1087 | ||
1088 | static void flush_iso_context(struct iso_context *ctx) | |
1089 | { | |
1090 | struct fw_ohci *ohci = fw_ohci(ctx->base.card); | |
1091 | struct descriptor *d, *last; | |
1092 | u32 address; | |
1093 | int z; | |
1094 | ||
1095 | dma_sync_single_for_cpu(ohci->card.device, ctx->buffer_bus, | |
1096 | ISO_BUFFER_SIZE, DMA_TO_DEVICE); | |
1097 | ||
1098 | d = ctx->tail_descriptor; | |
1099 | last = ctx->tail_descriptor_last; | |
1100 | ||
1101 | while (last->branch_address != 0 && last->transfer_status != 0) { | |
1102 | address = le32_to_cpu(last->branch_address); | |
1103 | z = address & 0xf; | |
1104 | d = ctx->buffer + (address - ctx->buffer_bus) / sizeof *d; | |
1105 | ||
1106 | if (z == 2) | |
1107 | last = d; | |
1108 | else | |
1109 | last = d + z - 1; | |
1110 | ||
1111 | if (le16_to_cpu(last->control) & descriptor_irq_always) | |
1112 | ctx->base.callback(&ctx->base, | |
1113 | 0, le16_to_cpu(last->res_count), | |
1114 | ctx->base.callback_data); | |
1115 | } | |
1116 | ||
1117 | ctx->tail_descriptor = d; | |
1118 | ctx->tail_descriptor_last = last; | |
1119 | } | |
1120 | ||
1121 | static void it_context_tasklet(unsigned long data) | |
1122 | { | |
1123 | struct iso_context *ctx = (struct iso_context *)data; | |
1124 | ||
1125 | flush_iso_context(ctx); | |
1126 | } | |
1127 | ||
1128 | static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, | |
1129 | int type) | |
1130 | { | |
1131 | struct fw_ohci *ohci = fw_ohci(card); | |
1132 | struct iso_context *ctx, *list; | |
1133 | void (*tasklet) (unsigned long data); | |
1134 | u32 *mask; | |
1135 | unsigned long flags; | |
1136 | int index; | |
1137 | ||
1138 | if (type == FW_ISO_CONTEXT_TRANSMIT) { | |
1139 | mask = &ohci->it_context_mask; | |
1140 | list = ohci->it_context_list; | |
1141 | tasklet = it_context_tasklet; | |
1142 | } else { | |
1143 | mask = &ohci->ir_context_mask; | |
1144 | list = ohci->ir_context_list; | |
1145 | tasklet = ir_context_tasklet; | |
1146 | } | |
1147 | ||
1148 | spin_lock_irqsave(&ohci->lock, flags); | |
1149 | index = ffs(*mask) - 1; | |
1150 | if (index >= 0) | |
1151 | *mask &= ~(1 << index); | |
1152 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1153 | ||
1154 | if (index < 0) | |
1155 | return ERR_PTR(-EBUSY); | |
1156 | ||
1157 | ctx = &list[index]; | |
1158 | memset(ctx, 0, sizeof *ctx); | |
1159 | tasklet_init(&ctx->tasklet, tasklet, (unsigned long)ctx); | |
1160 | ||
1161 | ctx->buffer = kmalloc(ISO_BUFFER_SIZE, GFP_KERNEL); | |
82eff9db KH |
1162 | if (ctx->buffer == NULL) |
1163 | goto buffer_alloc_failed; | |
ed568912 KH |
1164 | |
1165 | ctx->buffer_bus = | |
1166 | dma_map_single(card->device, ctx->buffer, | |
1167 | ISO_BUFFER_SIZE, DMA_TO_DEVICE); | |
82eff9db KH |
1168 | if (dma_mapping_error(ctx->buffer_bus)) |
1169 | goto buffer_map_failed; | |
ed568912 KH |
1170 | |
1171 | ctx->head_descriptor = ctx->buffer; | |
1172 | ctx->prev_descriptor = ctx->buffer; | |
1173 | ctx->tail_descriptor = ctx->buffer; | |
1174 | ctx->tail_descriptor_last = ctx->buffer; | |
1175 | ||
1176 | /* We put a dummy descriptor in the buffer that has a NULL | |
1177 | * branch address and looks like it's been sent. That way we | |
1178 | * have a descriptor to append DMA programs to. Also, the | |
1179 | * ring buffer invariant is that it always has at least one | |
1180 | * element so that head == tail means buffer full. */ | |
1181 | ||
1182 | memset(ctx->head_descriptor, 0, sizeof *ctx->head_descriptor); | |
5e20c282 SR |
1183 | ctx->head_descriptor->control = cpu_to_le16(descriptor_output_last); |
1184 | ctx->head_descriptor->transfer_status = cpu_to_le16(0x8011); | |
ed568912 KH |
1185 | ctx->head_descriptor++; |
1186 | ||
1187 | return &ctx->base; | |
82eff9db KH |
1188 | |
1189 | buffer_map_failed: | |
1190 | kfree(ctx->buffer); | |
1191 | buffer_alloc_failed: | |
1192 | spin_lock_irqsave(&ohci->lock, flags); | |
1193 | *mask |= 1 << index; | |
1194 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1195 | ||
1196 | return ERR_PTR(-ENOMEM); | |
ed568912 KH |
1197 | } |
1198 | ||
1199 | static int ohci_send_iso(struct fw_iso_context *base, s32 cycle) | |
1200 | { | |
1201 | struct iso_context *ctx = (struct iso_context *)base; | |
1202 | struct fw_ohci *ohci = fw_ohci(ctx->base.card); | |
1203 | u32 cycle_match = 0; | |
1204 | int index; | |
1205 | ||
1206 | index = ctx - ohci->it_context_list; | |
1207 | if (cycle > 0) | |
1208 | cycle_match = CONTEXT_CYCLE_MATCH_ENABLE | | |
1209 | (cycle & 0x7fff) << 16; | |
1210 | ||
1211 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
1212 | reg_write(ohci, OHCI1394_IsoXmitCommandPtr(index), | |
1213 | le32_to_cpu(ctx->tail_descriptor_last->branch_address)); | |
1214 | reg_write(ohci, OHCI1394_IsoXmitContextControlClear(index), ~0); | |
1215 | reg_write(ohci, OHCI1394_IsoXmitContextControlSet(index), | |
1216 | CONTEXT_RUN | cycle_match); | |
1217 | flush_writes(ohci); | |
1218 | ||
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | static void ohci_free_iso_context(struct fw_iso_context *base) | |
1223 | { | |
1224 | struct fw_ohci *ohci = fw_ohci(base->card); | |
1225 | struct iso_context *ctx = (struct iso_context *)base; | |
1226 | unsigned long flags; | |
1227 | int index; | |
1228 | ||
1229 | flush_iso_context(ctx); | |
1230 | ||
1231 | spin_lock_irqsave(&ohci->lock, flags); | |
1232 | ||
1233 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
1234 | index = ctx - ohci->it_context_list; | |
1235 | reg_write(ohci, OHCI1394_IsoXmitContextControlClear(index), ~0); | |
1236 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
1237 | ohci->it_context_mask |= 1 << index; | |
1238 | } else { | |
1239 | index = ctx - ohci->ir_context_list; | |
1240 | reg_write(ohci, OHCI1394_IsoRcvContextControlClear(index), ~0); | |
1241 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
1242 | ohci->ir_context_mask |= 1 << index; | |
1243 | } | |
1244 | flush_writes(ohci); | |
1245 | ||
1246 | dma_unmap_single(ohci->card.device, ctx->buffer_bus, | |
1247 | ISO_BUFFER_SIZE, DMA_TO_DEVICE); | |
1248 | ||
1249 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1250 | } | |
1251 | ||
1252 | static int | |
1253 | ohci_queue_iso(struct fw_iso_context *base, | |
1254 | struct fw_iso_packet *packet, void *payload) | |
1255 | { | |
1256 | struct iso_context *ctx = (struct iso_context *)base; | |
1257 | struct fw_ohci *ohci = fw_ohci(ctx->base.card); | |
1258 | struct descriptor *d, *end, *last, *tail, *pd; | |
1259 | struct fw_iso_packet *p; | |
1260 | __le32 *header; | |
1261 | dma_addr_t d_bus; | |
1262 | u32 z, header_z, payload_z, irq; | |
1263 | u32 payload_index, payload_end_index, next_page_index; | |
1264 | int index, page, end_page, i, length, offset; | |
1265 | ||
1266 | /* FIXME: Cycle lost behavior should be configurable: lose | |
1267 | * packet, retransmit or terminate.. */ | |
1268 | ||
1269 | p = packet; | |
1270 | payload_index = payload - ctx->base.buffer; | |
1271 | d = ctx->head_descriptor; | |
1272 | tail = ctx->tail_descriptor; | |
1273 | end = ctx->buffer + ISO_BUFFER_SIZE / sizeof(struct descriptor); | |
1274 | ||
1275 | if (p->skip) | |
1276 | z = 1; | |
1277 | else | |
1278 | z = 2; | |
1279 | if (p->header_length > 0) | |
1280 | z++; | |
1281 | ||
1282 | /* Determine the first page the payload isn't contained in. */ | |
1283 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
1284 | if (p->payload_length > 0) | |
1285 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
1286 | else | |
1287 | payload_z = 0; | |
1288 | ||
1289 | z += payload_z; | |
1290 | ||
1291 | /* Get header size in number of descriptors. */ | |
1292 | header_z = DIV_ROUND_UP(p->header_length, sizeof *d); | |
1293 | ||
1294 | if (d + z + header_z <= tail) { | |
1295 | goto has_space; | |
1296 | } else if (d > tail && d + z + header_z <= end) { | |
1297 | goto has_space; | |
1298 | } else if (d > tail && ctx->buffer + z + header_z <= tail) { | |
1299 | d = ctx->buffer; | |
1300 | goto has_space; | |
1301 | } | |
1302 | ||
1303 | /* No space in buffer */ | |
1304 | return -1; | |
1305 | ||
1306 | has_space: | |
1307 | memset(d, 0, (z + header_z) * sizeof *d); | |
1308 | d_bus = ctx->buffer_bus + (d - ctx->buffer) * sizeof *d; | |
1309 | ||
1310 | if (!p->skip) { | |
1311 | d[0].control = cpu_to_le16(descriptor_key_immediate); | |
1312 | d[0].req_count = cpu_to_le16(8); | |
1313 | ||
1314 | header = (__le32 *) &d[1]; | |
1315 | header[0] = cpu_to_le32(it_header_sy(p->sy) | | |
1316 | it_header_tag(p->tag) | | |
1317 | it_header_tcode(TCODE_STREAM_DATA) | | |
1318 | it_header_channel(ctx->base.channel) | | |
1319 | it_header_speed(ctx->base.speed)); | |
1320 | header[1] = | |
1321 | cpu_to_le32(it_header_data_length(p->header_length + | |
1322 | p->payload_length)); | |
1323 | } | |
1324 | ||
1325 | if (p->header_length > 0) { | |
1326 | d[2].req_count = cpu_to_le16(p->header_length); | |
1327 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof *d); | |
1328 | memcpy(&d[z], p->header, p->header_length); | |
1329 | } | |
1330 | ||
1331 | pd = d + z - payload_z; | |
1332 | payload_end_index = payload_index + p->payload_length; | |
1333 | for (i = 0; i < payload_z; i++) { | |
1334 | page = payload_index >> PAGE_SHIFT; | |
1335 | offset = payload_index & ~PAGE_MASK; | |
1336 | next_page_index = (page + 1) << PAGE_SHIFT; | |
1337 | length = | |
1338 | min(next_page_index, payload_end_index) - payload_index; | |
1339 | pd[i].req_count = cpu_to_le16(length); | |
1340 | pd[i].data_address = cpu_to_le32(ctx->base.pages[page] + offset); | |
1341 | ||
1342 | payload_index += length; | |
1343 | } | |
1344 | ||
1345 | if (z == 2) | |
1346 | last = d; | |
1347 | else | |
1348 | last = d + z - 1; | |
1349 | ||
1350 | if (p->interrupt) | |
1351 | irq = descriptor_irq_always; | |
1352 | else | |
1353 | irq = descriptor_no_irq; | |
1354 | ||
cbb59da7 KH |
1355 | last->control |= cpu_to_le16(descriptor_output_last | |
1356 | descriptor_status | | |
1357 | descriptor_branch_always | | |
1358 | irq); | |
ed568912 KH |
1359 | |
1360 | dma_sync_single_for_device(ohci->card.device, ctx->buffer_bus, | |
1361 | ISO_BUFFER_SIZE, DMA_TO_DEVICE); | |
1362 | ||
1363 | ctx->head_descriptor = d + z + header_z; | |
1364 | ctx->prev_descriptor->branch_address = cpu_to_le32(d_bus | z); | |
1365 | ctx->prev_descriptor = last; | |
1366 | ||
1367 | index = ctx - ohci->it_context_list; | |
1368 | reg_write(ohci, OHCI1394_IsoXmitContextControlSet(index), CONTEXT_WAKE); | |
1369 | flush_writes(ohci); | |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
21ebcd12 | 1374 | static const struct fw_card_driver ohci_driver = { |
ed568912 KH |
1375 | .name = ohci_driver_name, |
1376 | .enable = ohci_enable, | |
1377 | .update_phy_reg = ohci_update_phy_reg, | |
1378 | .set_config_rom = ohci_set_config_rom, | |
1379 | .send_request = ohci_send_request, | |
1380 | .send_response = ohci_send_response, | |
730c32f5 | 1381 | .cancel_packet = ohci_cancel_packet, |
ed568912 KH |
1382 | .enable_phys_dma = ohci_enable_phys_dma, |
1383 | ||
1384 | .allocate_iso_context = ohci_allocate_iso_context, | |
1385 | .free_iso_context = ohci_free_iso_context, | |
1386 | .queue_iso = ohci_queue_iso, | |
5af4e5ea | 1387 | .send_iso = ohci_send_iso, |
ed568912 KH |
1388 | }; |
1389 | ||
1390 | static int software_reset(struct fw_ohci *ohci) | |
1391 | { | |
1392 | int i; | |
1393 | ||
1394 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
1395 | ||
1396 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
1397 | if ((reg_read(ohci, OHCI1394_HCControlSet) & | |
1398 | OHCI1394_HCControl_softReset) == 0) | |
1399 | return 0; | |
1400 | msleep(1); | |
1401 | } | |
1402 | ||
1403 | return -EBUSY; | |
1404 | } | |
1405 | ||
1406 | /* ---------- pci subsystem interface ---------- */ | |
1407 | ||
1408 | enum { | |
1409 | CLEANUP_SELF_ID, | |
1410 | CLEANUP_REGISTERS, | |
1411 | CLEANUP_IOMEM, | |
1412 | CLEANUP_DISABLE, | |
1413 | CLEANUP_PUT_CARD, | |
1414 | }; | |
1415 | ||
1416 | static int cleanup(struct fw_ohci *ohci, int stage, int code) | |
1417 | { | |
1418 | struct pci_dev *dev = to_pci_dev(ohci->card.device); | |
1419 | ||
1420 | switch (stage) { | |
1421 | case CLEANUP_SELF_ID: | |
1422 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, | |
1423 | ohci->self_id_cpu, ohci->self_id_bus); | |
1424 | case CLEANUP_REGISTERS: | |
1425 | kfree(ohci->it_context_list); | |
1426 | kfree(ohci->ir_context_list); | |
1427 | pci_iounmap(dev, ohci->registers); | |
1428 | case CLEANUP_IOMEM: | |
1429 | pci_release_region(dev, 0); | |
1430 | case CLEANUP_DISABLE: | |
1431 | pci_disable_device(dev); | |
1432 | case CLEANUP_PUT_CARD: | |
1433 | fw_card_put(&ohci->card); | |
1434 | } | |
1435 | ||
1436 | return code; | |
1437 | } | |
1438 | ||
1439 | static int __devinit | |
1440 | pci_probe(struct pci_dev *dev, const struct pci_device_id *ent) | |
1441 | { | |
1442 | struct fw_ohci *ohci; | |
1443 | u32 bus_options, max_receive, link_speed; | |
1444 | u64 guid; | |
1445 | int error_code; | |
1446 | size_t size; | |
1447 | ||
1448 | ohci = kzalloc(sizeof *ohci, GFP_KERNEL); | |
1449 | if (ohci == NULL) { | |
1450 | fw_error("Could not malloc fw_ohci data.\n"); | |
1451 | return -ENOMEM; | |
1452 | } | |
1453 | ||
1454 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
1455 | ||
1456 | if (pci_enable_device(dev)) { | |
1457 | fw_error("Failed to enable OHCI hardware.\n"); | |
1458 | return cleanup(ohci, CLEANUP_PUT_CARD, -ENODEV); | |
1459 | } | |
1460 | ||
1461 | pci_set_master(dev); | |
1462 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
1463 | pci_set_drvdata(dev, ohci); | |
1464 | ||
1465 | spin_lock_init(&ohci->lock); | |
1466 | ||
1467 | tasklet_init(&ohci->bus_reset_tasklet, | |
1468 | bus_reset_tasklet, (unsigned long)ohci); | |
1469 | ||
1470 | if (pci_request_region(dev, 0, ohci_driver_name)) { | |
1471 | fw_error("MMIO resource unavailable\n"); | |
1472 | return cleanup(ohci, CLEANUP_DISABLE, -EBUSY); | |
1473 | } | |
1474 | ||
1475 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
1476 | if (ohci->registers == NULL) { | |
1477 | fw_error("Failed to remap registers\n"); | |
1478 | return cleanup(ohci, CLEANUP_IOMEM, -ENXIO); | |
1479 | } | |
1480 | ||
1481 | if (software_reset(ohci)) { | |
1482 | fw_error("Failed to reset ohci card.\n"); | |
1483 | return cleanup(ohci, CLEANUP_REGISTERS, -EBUSY); | |
1484 | } | |
1485 | ||
1486 | /* Now enable LPS, which we need in order to start accessing | |
1487 | * most of the registers. In fact, on some cards (ALI M5251), | |
1488 | * accessing registers in the SClk domain without LPS enabled | |
1489 | * will lock up the machine. Wait 50msec to make sure we have | |
1490 | * full link enabled. */ | |
1491 | reg_write(ohci, OHCI1394_HCControlSet, | |
1492 | OHCI1394_HCControl_LPS | | |
1493 | OHCI1394_HCControl_postedWriteEnable); | |
1494 | flush_writes(ohci); | |
1495 | msleep(50); | |
1496 | ||
1497 | reg_write(ohci, OHCI1394_HCControlClear, | |
1498 | OHCI1394_HCControl_noByteSwapData); | |
1499 | ||
1500 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1501 | OHCI1394_LinkControl_rcvSelfID | | |
1502 | OHCI1394_LinkControl_cycleTimerEnable | | |
1503 | OHCI1394_LinkControl_cycleMaster); | |
1504 | ||
1505 | ar_context_init(&ohci->ar_request_ctx, ohci, | |
1506 | OHCI1394_AsReqRcvContextControlSet); | |
1507 | ||
1508 | ar_context_init(&ohci->ar_response_ctx, ohci, | |
1509 | OHCI1394_AsRspRcvContextControlSet); | |
1510 | ||
1511 | at_context_init(&ohci->at_request_ctx, ohci, | |
1512 | OHCI1394_AsReqTrContextControlSet); | |
1513 | ||
1514 | at_context_init(&ohci->at_response_ctx, ohci, | |
1515 | OHCI1394_AsRspTrContextControlSet); | |
1516 | ||
1517 | reg_write(ohci, OHCI1394_ATRetries, | |
1518 | OHCI1394_MAX_AT_REQ_RETRIES | | |
1519 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
1520 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8)); | |
1521 | ||
1522 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); | |
1523 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); | |
1524 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); | |
1525 | size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask); | |
1526 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); | |
1527 | ||
1528 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
1529 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); | |
1530 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); | |
1531 | size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask); | |
1532 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); | |
1533 | ||
1534 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
1535 | fw_error("Out of memory for it/ir contexts.\n"); | |
1536 | return cleanup(ohci, CLEANUP_REGISTERS, -ENOMEM); | |
1537 | } | |
1538 | ||
1539 | /* self-id dma buffer allocation */ | |
1540 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, | |
1541 | SELF_ID_BUF_SIZE, | |
1542 | &ohci->self_id_bus, | |
1543 | GFP_KERNEL); | |
1544 | if (ohci->self_id_cpu == NULL) { | |
1545 | fw_error("Out of memory for self ID buffer.\n"); | |
1546 | return cleanup(ohci, CLEANUP_REGISTERS, -ENOMEM); | |
1547 | } | |
1548 | ||
1549 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); | |
1550 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); | |
1551 | reg_write(ohci, OHCI1394_IntEventClear, ~0); | |
1552 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
1553 | reg_write(ohci, OHCI1394_IntMaskSet, | |
1554 | OHCI1394_selfIDComplete | | |
1555 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
1556 | OHCI1394_reqTxComplete | OHCI1394_respTxComplete | | |
1557 | OHCI1394_isochRx | OHCI1394_isochTx | | |
1558 | OHCI1394_masterIntEnable); | |
1559 | ||
1560 | bus_options = reg_read(ohci, OHCI1394_BusOptions); | |
1561 | max_receive = (bus_options >> 12) & 0xf; | |
1562 | link_speed = bus_options & 0x7; | |
1563 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
1564 | reg_read(ohci, OHCI1394_GUIDLo); | |
1565 | ||
1566 | error_code = fw_card_add(&ohci->card, max_receive, link_speed, guid); | |
1567 | if (error_code < 0) | |
1568 | return cleanup(ohci, CLEANUP_SELF_ID, error_code); | |
1569 | ||
1570 | fw_notify("Added fw-ohci device %s.\n", dev->dev.bus_id); | |
1571 | ||
1572 | return 0; | |
1573 | } | |
1574 | ||
1575 | static void pci_remove(struct pci_dev *dev) | |
1576 | { | |
1577 | struct fw_ohci *ohci; | |
1578 | ||
1579 | ohci = pci_get_drvdata(dev); | |
1580 | reg_write(ohci, OHCI1394_IntMaskClear, OHCI1394_masterIntEnable); | |
1581 | fw_core_remove_card(&ohci->card); | |
1582 | ||
1583 | /* FIXME: Fail all pending packets here, now that the upper | |
1584 | * layers can't queue any more. */ | |
1585 | ||
1586 | software_reset(ohci); | |
1587 | free_irq(dev->irq, ohci); | |
1588 | cleanup(ohci, CLEANUP_SELF_ID, 0); | |
1589 | ||
1590 | fw_notify("Removed fw-ohci device.\n"); | |
1591 | } | |
1592 | ||
1593 | static struct pci_device_id pci_table[] = { | |
1594 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, | |
1595 | { } | |
1596 | }; | |
1597 | ||
1598 | MODULE_DEVICE_TABLE(pci, pci_table); | |
1599 | ||
1600 | static struct pci_driver fw_ohci_pci_driver = { | |
1601 | .name = ohci_driver_name, | |
1602 | .id_table = pci_table, | |
1603 | .probe = pci_probe, | |
1604 | .remove = pci_remove, | |
1605 | }; | |
1606 | ||
1607 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
1608 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
1609 | MODULE_LICENSE("GPL"); | |
1610 | ||
1611 | static int __init fw_ohci_init(void) | |
1612 | { | |
1613 | return pci_register_driver(&fw_ohci_pci_driver); | |
1614 | } | |
1615 | ||
1616 | static void __exit fw_ohci_cleanup(void) | |
1617 | { | |
1618 | pci_unregister_driver(&fw_ohci_pci_driver); | |
1619 | } | |
1620 | ||
1621 | module_init(fw_ohci_init); | |
1622 | module_exit(fw_ohci_cleanup); |