Commit | Line | Data |
---|---|---|
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 | ||
e524f616 | 21 | #include <linux/compiler.h> |
ed568912 | 22 | #include <linux/delay.h> |
cf3e72fd | 23 | #include <linux/dma-mapping.h> |
c26f0234 | 24 | #include <linux/gfp.h> |
a7fb60db SR |
25 | #include <linux/init.h> |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/kernel.h> | |
faa2fb4e | 28 | #include <linux/mm.h> |
a7fb60db SR |
29 | #include <linux/module.h> |
30 | #include <linux/pci.h> | |
c26f0234 | 31 | #include <linux/spinlock.h> |
cf3e72fd | 32 | |
c26f0234 | 33 | #include <asm/page.h> |
ee71c2f9 | 34 | #include <asm/system.h> |
ed568912 | 35 | |
ea8d006b SR |
36 | #ifdef CONFIG_PPC_PMAC |
37 | #include <asm/pmac_feature.h> | |
38 | #endif | |
39 | ||
ed568912 | 40 | #include "fw-ohci.h" |
a7fb60db | 41 | #include "fw-transaction.h" |
ed568912 | 42 | |
a77754a7 KH |
43 | #define DESCRIPTOR_OUTPUT_MORE 0 |
44 | #define DESCRIPTOR_OUTPUT_LAST (1 << 12) | |
45 | #define DESCRIPTOR_INPUT_MORE (2 << 12) | |
46 | #define DESCRIPTOR_INPUT_LAST (3 << 12) | |
47 | #define DESCRIPTOR_STATUS (1 << 11) | |
48 | #define DESCRIPTOR_KEY_IMMEDIATE (2 << 8) | |
49 | #define DESCRIPTOR_PING (1 << 7) | |
50 | #define DESCRIPTOR_YY (1 << 6) | |
51 | #define DESCRIPTOR_NO_IRQ (0 << 4) | |
52 | #define DESCRIPTOR_IRQ_ERROR (1 << 4) | |
53 | #define DESCRIPTOR_IRQ_ALWAYS (3 << 4) | |
54 | #define DESCRIPTOR_BRANCH_ALWAYS (3 << 2) | |
55 | #define DESCRIPTOR_WAIT (3 << 0) | |
ed568912 KH |
56 | |
57 | struct descriptor { | |
58 | __le16 req_count; | |
59 | __le16 control; | |
60 | __le32 data_address; | |
61 | __le32 branch_address; | |
62 | __le16 res_count; | |
63 | __le16 transfer_status; | |
64 | } __attribute__((aligned(16))); | |
65 | ||
295e3feb KH |
66 | struct db_descriptor { |
67 | __le16 first_size; | |
68 | __le16 control; | |
69 | __le16 second_req_count; | |
70 | __le16 first_req_count; | |
71 | __le32 branch_address; | |
72 | __le16 second_res_count; | |
73 | __le16 first_res_count; | |
74 | __le32 reserved0; | |
75 | __le32 first_buffer; | |
76 | __le32 second_buffer; | |
77 | __le32 reserved1; | |
78 | } __attribute__((aligned(16))); | |
79 | ||
a77754a7 KH |
80 | #define CONTROL_SET(regs) (regs) |
81 | #define CONTROL_CLEAR(regs) ((regs) + 4) | |
82 | #define COMMAND_PTR(regs) ((regs) + 12) | |
83 | #define CONTEXT_MATCH(regs) ((regs) + 16) | |
72e318e0 | 84 | |
32b46093 | 85 | struct ar_buffer { |
ed568912 | 86 | struct descriptor descriptor; |
32b46093 KH |
87 | struct ar_buffer *next; |
88 | __le32 data[0]; | |
89 | }; | |
ed568912 | 90 | |
32b46093 KH |
91 | struct ar_context { |
92 | struct fw_ohci *ohci; | |
93 | struct ar_buffer *current_buffer; | |
94 | struct ar_buffer *last_buffer; | |
95 | void *pointer; | |
72e318e0 | 96 | u32 regs; |
ed568912 KH |
97 | struct tasklet_struct tasklet; |
98 | }; | |
99 | ||
30200739 KH |
100 | struct context; |
101 | ||
102 | typedef int (*descriptor_callback_t)(struct context *ctx, | |
103 | struct descriptor *d, | |
104 | struct descriptor *last); | |
fe5ca634 DM |
105 | |
106 | /* | |
107 | * A buffer that contains a block of DMA-able coherent memory used for | |
108 | * storing a portion of a DMA descriptor program. | |
109 | */ | |
110 | struct descriptor_buffer { | |
111 | struct list_head list; | |
112 | dma_addr_t buffer_bus; | |
113 | size_t buffer_size; | |
114 | size_t used; | |
115 | struct descriptor buffer[0]; | |
116 | }; | |
117 | ||
30200739 | 118 | struct context { |
373b2edd | 119 | struct fw_ohci *ohci; |
30200739 | 120 | u32 regs; |
fe5ca634 | 121 | int total_allocation; |
373b2edd | 122 | |
fe5ca634 DM |
123 | /* |
124 | * List of page-sized buffers for storing DMA descriptors. | |
125 | * Head of list contains buffers in use and tail of list contains | |
126 | * free buffers. | |
127 | */ | |
128 | struct list_head buffer_list; | |
129 | ||
130 | /* | |
131 | * Pointer to a buffer inside buffer_list that contains the tail | |
132 | * end of the current DMA program. | |
133 | */ | |
134 | struct descriptor_buffer *buffer_tail; | |
135 | ||
136 | /* | |
137 | * The descriptor containing the branch address of the first | |
138 | * descriptor that has not yet been filled by the device. | |
139 | */ | |
140 | struct descriptor *last; | |
141 | ||
142 | /* | |
143 | * The last descriptor in the DMA program. It contains the branch | |
144 | * address that must be updated upon appending a new descriptor. | |
145 | */ | |
146 | struct descriptor *prev; | |
30200739 KH |
147 | |
148 | descriptor_callback_t callback; | |
149 | ||
373b2edd | 150 | struct tasklet_struct tasklet; |
30200739 | 151 | }; |
30200739 | 152 | |
a77754a7 KH |
153 | #define IT_HEADER_SY(v) ((v) << 0) |
154 | #define IT_HEADER_TCODE(v) ((v) << 4) | |
155 | #define IT_HEADER_CHANNEL(v) ((v) << 8) | |
156 | #define IT_HEADER_TAG(v) ((v) << 14) | |
157 | #define IT_HEADER_SPEED(v) ((v) << 16) | |
158 | #define IT_HEADER_DATA_LENGTH(v) ((v) << 16) | |
ed568912 KH |
159 | |
160 | struct iso_context { | |
161 | struct fw_iso_context base; | |
30200739 | 162 | struct context context; |
0642b657 | 163 | int excess_bytes; |
9b32d5f3 KH |
164 | void *header; |
165 | size_t header_length; | |
ed568912 KH |
166 | }; |
167 | ||
168 | #define CONFIG_ROM_SIZE 1024 | |
169 | ||
170 | struct fw_ohci { | |
171 | struct fw_card card; | |
172 | ||
e364cf4e | 173 | u32 version; |
ed568912 KH |
174 | __iomem char *registers; |
175 | dma_addr_t self_id_bus; | |
176 | __le32 *self_id_cpu; | |
177 | struct tasklet_struct bus_reset_tasklet; | |
e636fe25 | 178 | int node_id; |
ed568912 KH |
179 | int generation; |
180 | int request_generation; | |
d60d7f1d | 181 | u32 bus_seconds; |
11bf20ad | 182 | bool old_uninorth; |
ed568912 | 183 | |
c781c06d KH |
184 | /* |
185 | * Spinlock for accessing fw_ohci data. Never call out of | |
186 | * this driver with this lock held. | |
187 | */ | |
ed568912 KH |
188 | spinlock_t lock; |
189 | u32 self_id_buffer[512]; | |
190 | ||
191 | /* Config rom buffers */ | |
192 | __be32 *config_rom; | |
193 | dma_addr_t config_rom_bus; | |
194 | __be32 *next_config_rom; | |
195 | dma_addr_t next_config_rom_bus; | |
196 | u32 next_header; | |
197 | ||
198 | struct ar_context ar_request_ctx; | |
199 | struct ar_context ar_response_ctx; | |
f319b6a0 KH |
200 | struct context at_request_ctx; |
201 | struct context at_response_ctx; | |
ed568912 KH |
202 | |
203 | u32 it_context_mask; | |
204 | struct iso_context *it_context_list; | |
205 | u32 ir_context_mask; | |
206 | struct iso_context *ir_context_list; | |
207 | }; | |
208 | ||
95688e97 | 209 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
ed568912 KH |
210 | { |
211 | return container_of(card, struct fw_ohci, card); | |
212 | } | |
213 | ||
295e3feb KH |
214 | #define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 |
215 | #define IR_CONTEXT_BUFFER_FILL 0x80000000 | |
216 | #define IR_CONTEXT_ISOCH_HEADER 0x40000000 | |
217 | #define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000 | |
218 | #define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000 | |
219 | #define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000 | |
ed568912 KH |
220 | |
221 | #define CONTEXT_RUN 0x8000 | |
222 | #define CONTEXT_WAKE 0x1000 | |
223 | #define CONTEXT_DEAD 0x0800 | |
224 | #define CONTEXT_ACTIVE 0x0400 | |
225 | ||
226 | #define OHCI1394_MAX_AT_REQ_RETRIES 0x2 | |
227 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 | |
228 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 | |
229 | ||
230 | #define FW_OHCI_MAJOR 240 | |
231 | #define OHCI1394_REGISTER_SIZE 0x800 | |
232 | #define OHCI_LOOP_COUNT 500 | |
233 | #define OHCI1394_PCI_HCI_Control 0x40 | |
234 | #define SELF_ID_BUF_SIZE 0x800 | |
32b46093 | 235 | #define OHCI_TCODE_PHY_PACKET 0x0e |
e364cf4e | 236 | #define OHCI_VERSION_1_1 0x010010 |
0edeefd9 | 237 | |
ed568912 KH |
238 | static char ohci_driver_name[] = KBUILD_MODNAME; |
239 | ||
95688e97 | 240 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
ed568912 KH |
241 | { |
242 | writel(data, ohci->registers + offset); | |
243 | } | |
244 | ||
95688e97 | 245 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
ed568912 KH |
246 | { |
247 | return readl(ohci->registers + offset); | |
248 | } | |
249 | ||
95688e97 | 250 | static inline void flush_writes(const struct fw_ohci *ohci) |
ed568912 KH |
251 | { |
252 | /* Do a dummy read to flush writes. */ | |
253 | reg_read(ohci, OHCI1394_Version); | |
254 | } | |
255 | ||
256 | static int | |
257 | ohci_update_phy_reg(struct fw_card *card, int addr, | |
258 | int clear_bits, int set_bits) | |
259 | { | |
260 | struct fw_ohci *ohci = fw_ohci(card); | |
261 | u32 val, old; | |
262 | ||
263 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); | |
362e901c | 264 | flush_writes(ohci); |
ed568912 KH |
265 | msleep(2); |
266 | val = reg_read(ohci, OHCI1394_PhyControl); | |
267 | if ((val & OHCI1394_PhyControl_ReadDone) == 0) { | |
268 | fw_error("failed to set phy reg bits.\n"); | |
269 | return -EBUSY; | |
270 | } | |
271 | ||
272 | old = OHCI1394_PhyControl_ReadData(val); | |
273 | old = (old & ~clear_bits) | set_bits; | |
274 | reg_write(ohci, OHCI1394_PhyControl, | |
275 | OHCI1394_PhyControl_Write(addr, old)); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
32b46093 | 280 | static int ar_context_add_page(struct ar_context *ctx) |
ed568912 | 281 | { |
32b46093 KH |
282 | struct device *dev = ctx->ohci->card.device; |
283 | struct ar_buffer *ab; | |
f5101d58 | 284 | dma_addr_t uninitialized_var(ab_bus); |
32b46093 KH |
285 | size_t offset; |
286 | ||
bde1709a | 287 | ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC); |
32b46093 KH |
288 | if (ab == NULL) |
289 | return -ENOMEM; | |
290 | ||
2d826cc5 | 291 | memset(&ab->descriptor, 0, sizeof(ab->descriptor)); |
a77754a7 KH |
292 | ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | |
293 | DESCRIPTOR_STATUS | | |
294 | DESCRIPTOR_BRANCH_ALWAYS); | |
32b46093 KH |
295 | offset = offsetof(struct ar_buffer, data); |
296 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); | |
297 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); | |
298 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); | |
299 | ab->descriptor.branch_address = 0; | |
300 | ||
ec839e43 | 301 | ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1); |
32b46093 KH |
302 | ctx->last_buffer->next = ab; |
303 | ctx->last_buffer = ab; | |
304 | ||
a77754a7 | 305 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
ed568912 | 306 | flush_writes(ctx->ohci); |
32b46093 KH |
307 | |
308 | return 0; | |
ed568912 KH |
309 | } |
310 | ||
11bf20ad SR |
311 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
312 | #define cond_le32_to_cpu(v) \ | |
313 | (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v)) | |
314 | #else | |
315 | #define cond_le32_to_cpu(v) le32_to_cpu(v) | |
316 | #endif | |
317 | ||
32b46093 | 318 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 319 | { |
ed568912 | 320 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
321 | struct fw_packet p; |
322 | u32 status, length, tcode; | |
2639a6fb | 323 | |
11bf20ad SR |
324 | p.header[0] = cond_le32_to_cpu(buffer[0]); |
325 | p.header[1] = cond_le32_to_cpu(buffer[1]); | |
326 | p.header[2] = cond_le32_to_cpu(buffer[2]); | |
2639a6fb KH |
327 | |
328 | tcode = (p.header[0] >> 4) & 0x0f; | |
329 | switch (tcode) { | |
330 | case TCODE_WRITE_QUADLET_REQUEST: | |
331 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 332 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 333 | p.header_length = 16; |
32b46093 | 334 | p.payload_length = 0; |
2639a6fb KH |
335 | break; |
336 | ||
2639a6fb | 337 | case TCODE_READ_BLOCK_REQUEST : |
11bf20ad | 338 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
32b46093 KH |
339 | p.header_length = 16; |
340 | p.payload_length = 0; | |
341 | break; | |
342 | ||
343 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
344 | case TCODE_READ_BLOCK_RESPONSE: |
345 | case TCODE_LOCK_REQUEST: | |
346 | case TCODE_LOCK_RESPONSE: | |
11bf20ad | 347 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
2639a6fb | 348 | p.header_length = 16; |
32b46093 | 349 | p.payload_length = p.header[3] >> 16; |
2639a6fb KH |
350 | break; |
351 | ||
352 | case TCODE_WRITE_RESPONSE: | |
353 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 354 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 355 | p.header_length = 12; |
32b46093 | 356 | p.payload_length = 0; |
2639a6fb KH |
357 | break; |
358 | } | |
ed568912 | 359 | |
32b46093 KH |
360 | p.payload = (void *) buffer + p.header_length; |
361 | ||
362 | /* FIXME: What to do about evt_* errors? */ | |
363 | length = (p.header_length + p.payload_length + 3) / 4; | |
11bf20ad | 364 | status = cond_le32_to_cpu(buffer[length]); |
32b46093 KH |
365 | |
366 | p.ack = ((status >> 16) & 0x1f) - 16; | |
367 | p.speed = (status >> 21) & 0x7; | |
368 | p.timestamp = status & 0xffff; | |
369 | p.generation = ohci->request_generation; | |
ed568912 | 370 | |
c781c06d KH |
371 | /* |
372 | * The OHCI bus reset handler synthesizes a phy packet with | |
ed568912 KH |
373 | * the new generation number when a bus reset happens (see |
374 | * section 8.4.2.3). This helps us determine when a request | |
375 | * was received and make sure we send the response in the same | |
376 | * generation. We only need this for requests; for responses | |
377 | * we use the unique tlabel for finding the matching | |
c781c06d KH |
378 | * request. |
379 | */ | |
ed568912 | 380 | |
2639a6fb | 381 | if (p.ack + 16 == 0x09) |
25df287d | 382 | ohci->request_generation = (p.header[2] >> 16) & 0xff; |
ed568912 | 383 | else if (ctx == &ohci->ar_request_ctx) |
2639a6fb | 384 | fw_core_handle_request(&ohci->card, &p); |
ed568912 | 385 | else |
2639a6fb | 386 | fw_core_handle_response(&ohci->card, &p); |
ed568912 | 387 | |
32b46093 KH |
388 | return buffer + length + 1; |
389 | } | |
ed568912 | 390 | |
32b46093 KH |
391 | static void ar_context_tasklet(unsigned long data) |
392 | { | |
393 | struct ar_context *ctx = (struct ar_context *)data; | |
394 | struct fw_ohci *ohci = ctx->ohci; | |
395 | struct ar_buffer *ab; | |
396 | struct descriptor *d; | |
397 | void *buffer, *end; | |
398 | ||
399 | ab = ctx->current_buffer; | |
400 | d = &ab->descriptor; | |
401 | ||
402 | if (d->res_count == 0) { | |
403 | size_t size, rest, offset; | |
bde1709a | 404 | dma_addr_t buffer_bus; |
32b46093 | 405 | |
c781c06d KH |
406 | /* |
407 | * This descriptor is finished and we may have a | |
32b46093 | 408 | * packet split across this and the next buffer. We |
c781c06d KH |
409 | * reuse the page for reassembling the split packet. |
410 | */ | |
32b46093 KH |
411 | |
412 | offset = offsetof(struct ar_buffer, data); | |
bde1709a | 413 | buffer_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
32b46093 KH |
414 | |
415 | buffer = ab; | |
416 | ab = ab->next; | |
417 | d = &ab->descriptor; | |
418 | size = buffer + PAGE_SIZE - ctx->pointer; | |
419 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); | |
420 | memmove(buffer, ctx->pointer, size); | |
421 | memcpy(buffer + size, ab->data, rest); | |
422 | ctx->current_buffer = ab; | |
423 | ctx->pointer = (void *) ab->data + rest; | |
424 | end = buffer + size + rest; | |
425 | ||
426 | while (buffer < end) | |
427 | buffer = handle_ar_packet(ctx, buffer); | |
428 | ||
bde1709a JW |
429 | dma_free_coherent(ohci->card.device, PAGE_SIZE, |
430 | buffer, buffer_bus); | |
32b46093 KH |
431 | ar_context_add_page(ctx); |
432 | } else { | |
433 | buffer = ctx->pointer; | |
434 | ctx->pointer = end = | |
435 | (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); | |
436 | ||
437 | while (buffer < end) | |
438 | buffer = handle_ar_packet(ctx, buffer); | |
439 | } | |
ed568912 KH |
440 | } |
441 | ||
442 | static int | |
72e318e0 | 443 | ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 regs) |
ed568912 | 444 | { |
32b46093 | 445 | struct ar_buffer ab; |
ed568912 | 446 | |
72e318e0 KH |
447 | ctx->regs = regs; |
448 | ctx->ohci = ohci; | |
449 | ctx->last_buffer = &ab; | |
ed568912 KH |
450 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
451 | ||
32b46093 KH |
452 | ar_context_add_page(ctx); |
453 | ar_context_add_page(ctx); | |
454 | ctx->current_buffer = ab.next; | |
455 | ctx->pointer = ctx->current_buffer->data; | |
456 | ||
2aef469a KH |
457 | return 0; |
458 | } | |
459 | ||
460 | static void ar_context_run(struct ar_context *ctx) | |
461 | { | |
462 | struct ar_buffer *ab = ctx->current_buffer; | |
463 | dma_addr_t ab_bus; | |
464 | size_t offset; | |
465 | ||
466 | offset = offsetof(struct ar_buffer, data); | |
0a9972ba | 467 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
2aef469a KH |
468 | |
469 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1); | |
a77754a7 | 470 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
32b46093 | 471 | flush_writes(ctx->ohci); |
ed568912 | 472 | } |
373b2edd | 473 | |
a186b4a6 JW |
474 | static struct descriptor * |
475 | find_branch_descriptor(struct descriptor *d, int z) | |
476 | { | |
477 | int b, key; | |
478 | ||
479 | b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2; | |
480 | key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8; | |
481 | ||
482 | /* figure out which descriptor the branch address goes in */ | |
483 | if (z == 2 && (b == 3 || key == 2)) | |
484 | return d; | |
485 | else | |
486 | return d + z - 1; | |
487 | } | |
488 | ||
30200739 KH |
489 | static void context_tasklet(unsigned long data) |
490 | { | |
491 | struct context *ctx = (struct context *) data; | |
30200739 KH |
492 | struct descriptor *d, *last; |
493 | u32 address; | |
494 | int z; | |
fe5ca634 | 495 | struct descriptor_buffer *desc; |
30200739 | 496 | |
fe5ca634 DM |
497 | desc = list_entry(ctx->buffer_list.next, |
498 | struct descriptor_buffer, list); | |
499 | last = ctx->last; | |
30200739 | 500 | while (last->branch_address != 0) { |
fe5ca634 | 501 | struct descriptor_buffer *old_desc = desc; |
30200739 KH |
502 | address = le32_to_cpu(last->branch_address); |
503 | z = address & 0xf; | |
fe5ca634 DM |
504 | address &= ~0xf; |
505 | ||
506 | /* If the branch address points to a buffer outside of the | |
507 | * current buffer, advance to the next buffer. */ | |
508 | if (address < desc->buffer_bus || | |
509 | address >= desc->buffer_bus + desc->used) | |
510 | desc = list_entry(desc->list.next, | |
511 | struct descriptor_buffer, list); | |
512 | d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d); | |
a186b4a6 | 513 | last = find_branch_descriptor(d, z); |
30200739 KH |
514 | |
515 | if (!ctx->callback(ctx, d, last)) | |
516 | break; | |
517 | ||
fe5ca634 DM |
518 | if (old_desc != desc) { |
519 | /* If we've advanced to the next buffer, move the | |
520 | * previous buffer to the free list. */ | |
521 | unsigned long flags; | |
522 | old_desc->used = 0; | |
523 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
524 | list_move_tail(&old_desc->list, &ctx->buffer_list); | |
525 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); | |
526 | } | |
527 | ctx->last = last; | |
30200739 KH |
528 | } |
529 | } | |
530 | ||
fe5ca634 DM |
531 | /* |
532 | * Allocate a new buffer and add it to the list of free buffers for this | |
533 | * context. Must be called with ohci->lock held. | |
534 | */ | |
535 | static int | |
536 | context_add_buffer(struct context *ctx) | |
537 | { | |
538 | struct descriptor_buffer *desc; | |
f5101d58 | 539 | dma_addr_t uninitialized_var(bus_addr); |
fe5ca634 DM |
540 | int offset; |
541 | ||
542 | /* | |
543 | * 16MB of descriptors should be far more than enough for any DMA | |
544 | * program. This will catch run-away userspace or DoS attacks. | |
545 | */ | |
546 | if (ctx->total_allocation >= 16*1024*1024) | |
547 | return -ENOMEM; | |
548 | ||
549 | desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
550 | &bus_addr, GFP_ATOMIC); | |
551 | if (!desc) | |
552 | return -ENOMEM; | |
553 | ||
554 | offset = (void *)&desc->buffer - (void *)desc; | |
555 | desc->buffer_size = PAGE_SIZE - offset; | |
556 | desc->buffer_bus = bus_addr + offset; | |
557 | desc->used = 0; | |
558 | ||
559 | list_add_tail(&desc->list, &ctx->buffer_list); | |
560 | ctx->total_allocation += PAGE_SIZE; | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
30200739 KH |
565 | static int |
566 | context_init(struct context *ctx, struct fw_ohci *ohci, | |
fe5ca634 | 567 | u32 regs, descriptor_callback_t callback) |
30200739 KH |
568 | { |
569 | ctx->ohci = ohci; | |
570 | ctx->regs = regs; | |
fe5ca634 DM |
571 | ctx->total_allocation = 0; |
572 | ||
573 | INIT_LIST_HEAD(&ctx->buffer_list); | |
574 | if (context_add_buffer(ctx) < 0) | |
30200739 KH |
575 | return -ENOMEM; |
576 | ||
fe5ca634 DM |
577 | ctx->buffer_tail = list_entry(ctx->buffer_list.next, |
578 | struct descriptor_buffer, list); | |
579 | ||
30200739 KH |
580 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); |
581 | ctx->callback = callback; | |
582 | ||
c781c06d KH |
583 | /* |
584 | * We put a dummy descriptor in the buffer that has a NULL | |
30200739 | 585 | * branch address and looks like it's been sent. That way we |
fe5ca634 | 586 | * have a descriptor to append DMA programs to. |
c781c06d | 587 | */ |
fe5ca634 DM |
588 | memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer)); |
589 | ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); | |
590 | ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011); | |
591 | ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer); | |
592 | ctx->last = ctx->buffer_tail->buffer; | |
593 | ctx->prev = ctx->buffer_tail->buffer; | |
30200739 KH |
594 | |
595 | return 0; | |
596 | } | |
597 | ||
9b32d5f3 | 598 | static void |
30200739 KH |
599 | context_release(struct context *ctx) |
600 | { | |
601 | struct fw_card *card = &ctx->ohci->card; | |
fe5ca634 | 602 | struct descriptor_buffer *desc, *tmp; |
30200739 | 603 | |
fe5ca634 DM |
604 | list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list) |
605 | dma_free_coherent(card->device, PAGE_SIZE, desc, | |
606 | desc->buffer_bus - | |
607 | ((void *)&desc->buffer - (void *)desc)); | |
30200739 KH |
608 | } |
609 | ||
fe5ca634 | 610 | /* Must be called with ohci->lock held */ |
30200739 KH |
611 | static struct descriptor * |
612 | context_get_descriptors(struct context *ctx, int z, dma_addr_t *d_bus) | |
613 | { | |
fe5ca634 DM |
614 | struct descriptor *d = NULL; |
615 | struct descriptor_buffer *desc = ctx->buffer_tail; | |
616 | ||
617 | if (z * sizeof(*d) > desc->buffer_size) | |
618 | return NULL; | |
619 | ||
620 | if (z * sizeof(*d) > desc->buffer_size - desc->used) { | |
621 | /* No room for the descriptor in this buffer, so advance to the | |
622 | * next one. */ | |
30200739 | 623 | |
fe5ca634 DM |
624 | if (desc->list.next == &ctx->buffer_list) { |
625 | /* If there is no free buffer next in the list, | |
626 | * allocate one. */ | |
627 | if (context_add_buffer(ctx) < 0) | |
628 | return NULL; | |
629 | } | |
630 | desc = list_entry(desc->list.next, | |
631 | struct descriptor_buffer, list); | |
632 | ctx->buffer_tail = desc; | |
633 | } | |
30200739 | 634 | |
fe5ca634 | 635 | d = desc->buffer + desc->used / sizeof(*d); |
2d826cc5 | 636 | memset(d, 0, z * sizeof(*d)); |
fe5ca634 | 637 | *d_bus = desc->buffer_bus + desc->used; |
30200739 KH |
638 | |
639 | return d; | |
640 | } | |
641 | ||
295e3feb | 642 | static void context_run(struct context *ctx, u32 extra) |
30200739 KH |
643 | { |
644 | struct fw_ohci *ohci = ctx->ohci; | |
645 | ||
a77754a7 | 646 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
fe5ca634 | 647 | le32_to_cpu(ctx->last->branch_address)); |
a77754a7 KH |
648 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
649 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); | |
30200739 KH |
650 | flush_writes(ohci); |
651 | } | |
652 | ||
653 | static void context_append(struct context *ctx, | |
654 | struct descriptor *d, int z, int extra) | |
655 | { | |
656 | dma_addr_t d_bus; | |
fe5ca634 | 657 | struct descriptor_buffer *desc = ctx->buffer_tail; |
30200739 | 658 | |
fe5ca634 | 659 | d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d); |
30200739 | 660 | |
fe5ca634 DM |
661 | desc->used += (z + extra) * sizeof(*d); |
662 | ctx->prev->branch_address = cpu_to_le32(d_bus | z); | |
663 | ctx->prev = find_branch_descriptor(d, z); | |
30200739 | 664 | |
a77754a7 | 665 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
30200739 KH |
666 | flush_writes(ctx->ohci); |
667 | } | |
668 | ||
669 | static void context_stop(struct context *ctx) | |
670 | { | |
671 | u32 reg; | |
b8295668 | 672 | int i; |
30200739 | 673 | |
a77754a7 | 674 | reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
b8295668 | 675 | flush_writes(ctx->ohci); |
30200739 | 676 | |
b8295668 | 677 | for (i = 0; i < 10; i++) { |
a77754a7 | 678 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
b8295668 KH |
679 | if ((reg & CONTEXT_ACTIVE) == 0) |
680 | break; | |
681 | ||
682 | fw_notify("context_stop: still active (0x%08x)\n", reg); | |
b980f5a2 | 683 | mdelay(1); |
b8295668 | 684 | } |
30200739 | 685 | } |
ed568912 | 686 | |
f319b6a0 KH |
687 | struct driver_data { |
688 | struct fw_packet *packet; | |
689 | }; | |
ed568912 | 690 | |
c781c06d KH |
691 | /* |
692 | * This function apppends a packet to the DMA queue for transmission. | |
f319b6a0 | 693 | * Must always be called with the ochi->lock held to ensure proper |
c781c06d KH |
694 | * generation handling and locking around packet queue manipulation. |
695 | */ | |
f319b6a0 KH |
696 | static int |
697 | at_context_queue_packet(struct context *ctx, struct fw_packet *packet) | |
ed568912 | 698 | { |
ed568912 | 699 | struct fw_ohci *ohci = ctx->ohci; |
4b6d51ec | 700 | dma_addr_t d_bus, uninitialized_var(payload_bus); |
f319b6a0 KH |
701 | struct driver_data *driver_data; |
702 | struct descriptor *d, *last; | |
703 | __le32 *header; | |
ed568912 | 704 | int z, tcode; |
f319b6a0 | 705 | u32 reg; |
ed568912 | 706 | |
f319b6a0 KH |
707 | d = context_get_descriptors(ctx, 4, &d_bus); |
708 | if (d == NULL) { | |
709 | packet->ack = RCODE_SEND_ERROR; | |
710 | return -1; | |
ed568912 KH |
711 | } |
712 | ||
a77754a7 | 713 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
f319b6a0 KH |
714 | d[0].res_count = cpu_to_le16(packet->timestamp); |
715 | ||
c781c06d KH |
716 | /* |
717 | * The DMA format for asyncronous link packets is different | |
ed568912 KH |
718 | * from the IEEE1394 layout, so shift the fields around |
719 | * accordingly. If header_length is 8, it's a PHY packet, to | |
c781c06d KH |
720 | * which we need to prepend an extra quadlet. |
721 | */ | |
f319b6a0 KH |
722 | |
723 | header = (__le32 *) &d[1]; | |
ed568912 | 724 | if (packet->header_length > 8) { |
f319b6a0 KH |
725 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
726 | (packet->speed << 16)); | |
727 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
728 | (packet->header[0] & 0xffff0000)); | |
729 | header[2] = cpu_to_le32(packet->header[2]); | |
ed568912 KH |
730 | |
731 | tcode = (packet->header[0] >> 4) & 0x0f; | |
732 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
f319b6a0 | 733 | header[3] = cpu_to_le32(packet->header[3]); |
ed568912 | 734 | else |
f319b6a0 KH |
735 | header[3] = (__force __le32) packet->header[3]; |
736 | ||
737 | d[0].req_count = cpu_to_le16(packet->header_length); | |
ed568912 | 738 | } else { |
f319b6a0 KH |
739 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
740 | (packet->speed << 16)); | |
741 | header[1] = cpu_to_le32(packet->header[0]); | |
742 | header[2] = cpu_to_le32(packet->header[1]); | |
743 | d[0].req_count = cpu_to_le16(12); | |
ed568912 KH |
744 | } |
745 | ||
f319b6a0 KH |
746 | driver_data = (struct driver_data *) &d[3]; |
747 | driver_data->packet = packet; | |
20d11673 | 748 | packet->driver_data = driver_data; |
a186b4a6 | 749 | |
f319b6a0 KH |
750 | if (packet->payload_length > 0) { |
751 | payload_bus = | |
752 | dma_map_single(ohci->card.device, packet->payload, | |
753 | packet->payload_length, DMA_TO_DEVICE); | |
754 | if (dma_mapping_error(payload_bus)) { | |
755 | packet->ack = RCODE_SEND_ERROR; | |
756 | return -1; | |
757 | } | |
758 | ||
759 | d[2].req_count = cpu_to_le16(packet->payload_length); | |
760 | d[2].data_address = cpu_to_le32(payload_bus); | |
761 | last = &d[2]; | |
762 | z = 3; | |
ed568912 | 763 | } else { |
f319b6a0 KH |
764 | last = &d[0]; |
765 | z = 2; | |
ed568912 | 766 | } |
ed568912 | 767 | |
a77754a7 KH |
768 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
769 | DESCRIPTOR_IRQ_ALWAYS | | |
770 | DESCRIPTOR_BRANCH_ALWAYS); | |
ed568912 | 771 | |
f319b6a0 KH |
772 | /* FIXME: Document how the locking works. */ |
773 | if (ohci->generation != packet->generation) { | |
ab88ca48 SR |
774 | if (packet->payload_length > 0) |
775 | dma_unmap_single(ohci->card.device, payload_bus, | |
776 | packet->payload_length, DMA_TO_DEVICE); | |
f319b6a0 KH |
777 | packet->ack = RCODE_GENERATION; |
778 | return -1; | |
779 | } | |
780 | ||
781 | context_append(ctx, d, z, 4 - z); | |
ed568912 | 782 | |
f319b6a0 | 783 | /* If the context isn't already running, start it up. */ |
a77754a7 | 784 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
053b3080 | 785 | if ((reg & CONTEXT_RUN) == 0) |
f319b6a0 KH |
786 | context_run(ctx, 0); |
787 | ||
788 | return 0; | |
ed568912 KH |
789 | } |
790 | ||
f319b6a0 KH |
791 | static int handle_at_packet(struct context *context, |
792 | struct descriptor *d, | |
793 | struct descriptor *last) | |
ed568912 | 794 | { |
f319b6a0 | 795 | struct driver_data *driver_data; |
ed568912 | 796 | struct fw_packet *packet; |
f319b6a0 KH |
797 | struct fw_ohci *ohci = context->ohci; |
798 | dma_addr_t payload_bus; | |
ed568912 KH |
799 | int evt; |
800 | ||
f319b6a0 KH |
801 | if (last->transfer_status == 0) |
802 | /* This descriptor isn't done yet, stop iteration. */ | |
803 | return 0; | |
ed568912 | 804 | |
f319b6a0 KH |
805 | driver_data = (struct driver_data *) &d[3]; |
806 | packet = driver_data->packet; | |
807 | if (packet == NULL) | |
808 | /* This packet was cancelled, just continue. */ | |
809 | return 1; | |
730c32f5 | 810 | |
f319b6a0 KH |
811 | payload_bus = le32_to_cpu(last->data_address); |
812 | if (payload_bus != 0) | |
813 | dma_unmap_single(ohci->card.device, payload_bus, | |
ed568912 | 814 | packet->payload_length, DMA_TO_DEVICE); |
ed568912 | 815 | |
f319b6a0 KH |
816 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
817 | packet->timestamp = le16_to_cpu(last->res_count); | |
ed568912 | 818 | |
f319b6a0 KH |
819 | switch (evt) { |
820 | case OHCI1394_evt_timeout: | |
821 | /* Async response transmit timed out. */ | |
822 | packet->ack = RCODE_CANCELLED; | |
823 | break; | |
ed568912 | 824 | |
f319b6a0 | 825 | case OHCI1394_evt_flushed: |
c781c06d KH |
826 | /* |
827 | * The packet was flushed should give same error as | |
828 | * when we try to use a stale generation count. | |
829 | */ | |
f319b6a0 KH |
830 | packet->ack = RCODE_GENERATION; |
831 | break; | |
ed568912 | 832 | |
f319b6a0 | 833 | case OHCI1394_evt_missing_ack: |
c781c06d KH |
834 | /* |
835 | * Using a valid (current) generation count, but the | |
836 | * node is not on the bus or not sending acks. | |
837 | */ | |
f319b6a0 KH |
838 | packet->ack = RCODE_NO_ACK; |
839 | break; | |
ed568912 | 840 | |
f319b6a0 KH |
841 | case ACK_COMPLETE + 0x10: |
842 | case ACK_PENDING + 0x10: | |
843 | case ACK_BUSY_X + 0x10: | |
844 | case ACK_BUSY_A + 0x10: | |
845 | case ACK_BUSY_B + 0x10: | |
846 | case ACK_DATA_ERROR + 0x10: | |
847 | case ACK_TYPE_ERROR + 0x10: | |
848 | packet->ack = evt - 0x10; | |
849 | break; | |
ed568912 | 850 | |
f319b6a0 KH |
851 | default: |
852 | packet->ack = RCODE_SEND_ERROR; | |
853 | break; | |
854 | } | |
ed568912 | 855 | |
f319b6a0 | 856 | packet->callback(packet, &ohci->card, packet->ack); |
ed568912 | 857 | |
f319b6a0 | 858 | return 1; |
ed568912 KH |
859 | } |
860 | ||
a77754a7 KH |
861 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
862 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
863 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
864 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
865 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
93c4cceb KH |
866 | |
867 | static void | |
868 | handle_local_rom(struct fw_ohci *ohci, struct fw_packet *packet, u32 csr) | |
869 | { | |
870 | struct fw_packet response; | |
871 | int tcode, length, i; | |
872 | ||
a77754a7 | 873 | tcode = HEADER_GET_TCODE(packet->header[0]); |
93c4cceb | 874 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
a77754a7 | 875 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
93c4cceb KH |
876 | else |
877 | length = 4; | |
878 | ||
879 | i = csr - CSR_CONFIG_ROM; | |
880 | if (i + length > CONFIG_ROM_SIZE) { | |
881 | fw_fill_response(&response, packet->header, | |
882 | RCODE_ADDRESS_ERROR, NULL, 0); | |
883 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
884 | fw_fill_response(&response, packet->header, | |
885 | RCODE_TYPE_ERROR, NULL, 0); | |
886 | } else { | |
887 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
888 | (void *) ohci->config_rom + i, length); | |
889 | } | |
890 | ||
891 | fw_core_handle_response(&ohci->card, &response); | |
892 | } | |
893 | ||
894 | static void | |
895 | handle_local_lock(struct fw_ohci *ohci, struct fw_packet *packet, u32 csr) | |
896 | { | |
897 | struct fw_packet response; | |
898 | int tcode, length, ext_tcode, sel; | |
899 | __be32 *payload, lock_old; | |
900 | u32 lock_arg, lock_data; | |
901 | ||
a77754a7 KH |
902 | tcode = HEADER_GET_TCODE(packet->header[0]); |
903 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); | |
93c4cceb | 904 | payload = packet->payload; |
a77754a7 | 905 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
93c4cceb KH |
906 | |
907 | if (tcode == TCODE_LOCK_REQUEST && | |
908 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
909 | lock_arg = be32_to_cpu(payload[0]); | |
910 | lock_data = be32_to_cpu(payload[1]); | |
911 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
912 | lock_arg = 0; | |
913 | lock_data = 0; | |
914 | } else { | |
915 | fw_fill_response(&response, packet->header, | |
916 | RCODE_TYPE_ERROR, NULL, 0); | |
917 | goto out; | |
918 | } | |
919 | ||
920 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
921 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
922 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
923 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
924 | ||
925 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) | |
926 | lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData)); | |
927 | else | |
928 | fw_notify("swap not done yet\n"); | |
929 | ||
930 | fw_fill_response(&response, packet->header, | |
2d826cc5 | 931 | RCODE_COMPLETE, &lock_old, sizeof(lock_old)); |
93c4cceb KH |
932 | out: |
933 | fw_core_handle_response(&ohci->card, &response); | |
934 | } | |
935 | ||
936 | static void | |
f319b6a0 | 937 | handle_local_request(struct context *ctx, struct fw_packet *packet) |
93c4cceb KH |
938 | { |
939 | u64 offset; | |
940 | u32 csr; | |
941 | ||
473d28c7 KH |
942 | if (ctx == &ctx->ohci->at_request_ctx) { |
943 | packet->ack = ACK_PENDING; | |
944 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
945 | } | |
93c4cceb KH |
946 | |
947 | offset = | |
948 | ((unsigned long long) | |
a77754a7 | 949 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
93c4cceb KH |
950 | packet->header[2]; |
951 | csr = offset - CSR_REGISTER_BASE; | |
952 | ||
953 | /* Handle config rom reads. */ | |
954 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
955 | handle_local_rom(ctx->ohci, packet, csr); | |
956 | else switch (csr) { | |
957 | case CSR_BUS_MANAGER_ID: | |
958 | case CSR_BANDWIDTH_AVAILABLE: | |
959 | case CSR_CHANNELS_AVAILABLE_HI: | |
960 | case CSR_CHANNELS_AVAILABLE_LO: | |
961 | handle_local_lock(ctx->ohci, packet, csr); | |
962 | break; | |
963 | default: | |
964 | if (ctx == &ctx->ohci->at_request_ctx) | |
965 | fw_core_handle_request(&ctx->ohci->card, packet); | |
966 | else | |
967 | fw_core_handle_response(&ctx->ohci->card, packet); | |
968 | break; | |
969 | } | |
473d28c7 KH |
970 | |
971 | if (ctx == &ctx->ohci->at_response_ctx) { | |
972 | packet->ack = ACK_COMPLETE; | |
973 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
974 | } | |
93c4cceb | 975 | } |
e636fe25 | 976 | |
ed568912 | 977 | static void |
f319b6a0 | 978 | at_context_transmit(struct context *ctx, struct fw_packet *packet) |
ed568912 | 979 | { |
ed568912 | 980 | unsigned long flags; |
f319b6a0 | 981 | int retval; |
ed568912 KH |
982 | |
983 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
984 | ||
a77754a7 | 985 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
e636fe25 | 986 | ctx->ohci->generation == packet->generation) { |
93c4cceb KH |
987 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
988 | handle_local_request(ctx, packet); | |
989 | return; | |
e636fe25 | 990 | } |
ed568912 | 991 | |
f319b6a0 | 992 | retval = at_context_queue_packet(ctx, packet); |
ed568912 KH |
993 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
994 | ||
f319b6a0 KH |
995 | if (retval < 0) |
996 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
a186b4a6 | 997 | |
ed568912 KH |
998 | } |
999 | ||
1000 | static void bus_reset_tasklet(unsigned long data) | |
1001 | { | |
1002 | struct fw_ohci *ohci = (struct fw_ohci *)data; | |
e636fe25 | 1003 | int self_id_count, i, j, reg; |
ed568912 KH |
1004 | int generation, new_generation; |
1005 | unsigned long flags; | |
4eaff7d6 SR |
1006 | void *free_rom = NULL; |
1007 | dma_addr_t free_rom_bus = 0; | |
ed568912 KH |
1008 | |
1009 | reg = reg_read(ohci, OHCI1394_NodeID); | |
1010 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
02ff8f8e | 1011 | fw_notify("node ID not valid, new bus reset in progress\n"); |
ed568912 KH |
1012 | return; |
1013 | } | |
02ff8f8e SR |
1014 | if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { |
1015 | fw_notify("malconfigured bus\n"); | |
1016 | return; | |
1017 | } | |
1018 | ohci->node_id = reg & (OHCI1394_NodeID_busNumber | | |
1019 | OHCI1394_NodeID_nodeNumber); | |
ed568912 | 1020 | |
c781c06d KH |
1021 | /* |
1022 | * The count in the SelfIDCount register is the number of | |
ed568912 KH |
1023 | * bytes in the self ID receive buffer. Since we also receive |
1024 | * the inverted quadlets and a header quadlet, we shift one | |
c781c06d KH |
1025 | * bit extra to get the actual number of self IDs. |
1026 | */ | |
ed568912 KH |
1027 | |
1028 | self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff; | |
11bf20ad | 1029 | generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; |
ee71c2f9 | 1030 | rmb(); |
ed568912 KH |
1031 | |
1032 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
1033 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) | |
1034 | fw_error("inconsistent self IDs\n"); | |
11bf20ad SR |
1035 | ohci->self_id_buffer[j] = |
1036 | cond_le32_to_cpu(ohci->self_id_cpu[i]); | |
ed568912 | 1037 | } |
ee71c2f9 | 1038 | rmb(); |
ed568912 | 1039 | |
c781c06d KH |
1040 | /* |
1041 | * Check the consistency of the self IDs we just read. The | |
ed568912 KH |
1042 | * problem we face is that a new bus reset can start while we |
1043 | * read out the self IDs from the DMA buffer. If this happens, | |
1044 | * the DMA buffer will be overwritten with new self IDs and we | |
1045 | * will read out inconsistent data. The OHCI specification | |
1046 | * (section 11.2) recommends a technique similar to | |
1047 | * linux/seqlock.h, where we remember the generation of the | |
1048 | * self IDs in the buffer before reading them out and compare | |
1049 | * it to the current generation after reading them out. If | |
1050 | * the two generations match we know we have a consistent set | |
c781c06d KH |
1051 | * of self IDs. |
1052 | */ | |
ed568912 KH |
1053 | |
1054 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
1055 | if (new_generation != generation) { | |
1056 | fw_notify("recursive bus reset detected, " | |
1057 | "discarding self ids\n"); | |
1058 | return; | |
1059 | } | |
1060 | ||
1061 | /* FIXME: Document how the locking works. */ | |
1062 | spin_lock_irqsave(&ohci->lock, flags); | |
1063 | ||
1064 | ohci->generation = generation; | |
f319b6a0 KH |
1065 | context_stop(&ohci->at_request_ctx); |
1066 | context_stop(&ohci->at_response_ctx); | |
ed568912 KH |
1067 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
1068 | ||
c781c06d KH |
1069 | /* |
1070 | * This next bit is unrelated to the AT context stuff but we | |
ed568912 KH |
1071 | * have to do it under the spinlock also. If a new config rom |
1072 | * was set up before this reset, the old one is now no longer | |
1073 | * in use and we can free it. Update the config rom pointers | |
1074 | * to point to the current config rom and clear the | |
c781c06d KH |
1075 | * next_config_rom pointer so a new udpate can take place. |
1076 | */ | |
ed568912 KH |
1077 | |
1078 | if (ohci->next_config_rom != NULL) { | |
0bd243c4 KH |
1079 | if (ohci->next_config_rom != ohci->config_rom) { |
1080 | free_rom = ohci->config_rom; | |
1081 | free_rom_bus = ohci->config_rom_bus; | |
1082 | } | |
ed568912 KH |
1083 | ohci->config_rom = ohci->next_config_rom; |
1084 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
1085 | ohci->next_config_rom = NULL; | |
1086 | ||
c781c06d KH |
1087 | /* |
1088 | * Restore config_rom image and manually update | |
ed568912 KH |
1089 | * config_rom registers. Writing the header quadlet |
1090 | * will indicate that the config rom is ready, so we | |
c781c06d KH |
1091 | * do that last. |
1092 | */ | |
ed568912 KH |
1093 | reg_write(ohci, OHCI1394_BusOptions, |
1094 | be32_to_cpu(ohci->config_rom[2])); | |
1095 | ohci->config_rom[0] = cpu_to_be32(ohci->next_header); | |
1096 | reg_write(ohci, OHCI1394_ConfigROMhdr, ohci->next_header); | |
1097 | } | |
1098 | ||
1099 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1100 | ||
4eaff7d6 SR |
1101 | if (free_rom) |
1102 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1103 | free_rom, free_rom_bus); | |
1104 | ||
e636fe25 | 1105 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
ed568912 KH |
1106 | self_id_count, ohci->self_id_buffer); |
1107 | } | |
1108 | ||
1109 | static irqreturn_t irq_handler(int irq, void *data) | |
1110 | { | |
1111 | struct fw_ohci *ohci = data; | |
d60d7f1d | 1112 | u32 event, iso_event, cycle_time; |
ed568912 KH |
1113 | int i; |
1114 | ||
1115 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
1116 | ||
a515958d | 1117 | if (!event || !~event) |
ed568912 KH |
1118 | return IRQ_NONE; |
1119 | ||
1120 | reg_write(ohci, OHCI1394_IntEventClear, event); | |
1121 | ||
1122 | if (event & OHCI1394_selfIDComplete) | |
1123 | tasklet_schedule(&ohci->bus_reset_tasklet); | |
1124 | ||
1125 | if (event & OHCI1394_RQPkt) | |
1126 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
1127 | ||
1128 | if (event & OHCI1394_RSPkt) | |
1129 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
1130 | ||
1131 | if (event & OHCI1394_reqTxComplete) | |
1132 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
1133 | ||
1134 | if (event & OHCI1394_respTxComplete) | |
1135 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
1136 | ||
c889475f | 1137 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); |
ed568912 KH |
1138 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); |
1139 | ||
1140 | while (iso_event) { | |
1141 | i = ffs(iso_event) - 1; | |
30200739 | 1142 | tasklet_schedule(&ohci->ir_context_list[i].context.tasklet); |
ed568912 KH |
1143 | iso_event &= ~(1 << i); |
1144 | } | |
1145 | ||
c889475f | 1146 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); |
ed568912 KH |
1147 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); |
1148 | ||
1149 | while (iso_event) { | |
1150 | i = ffs(iso_event) - 1; | |
30200739 | 1151 | tasklet_schedule(&ohci->it_context_list[i].context.tasklet); |
ed568912 KH |
1152 | iso_event &= ~(1 << i); |
1153 | } | |
1154 | ||
e524f616 SR |
1155 | if (unlikely(event & OHCI1394_postedWriteErr)) |
1156 | fw_error("PCI posted write error\n"); | |
1157 | ||
bb9f2206 SR |
1158 | if (unlikely(event & OHCI1394_cycleTooLong)) { |
1159 | if (printk_ratelimit()) | |
1160 | fw_notify("isochronous cycle too long\n"); | |
1161 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1162 | OHCI1394_LinkControl_cycleMaster); | |
1163 | } | |
1164 | ||
d60d7f1d KH |
1165 | if (event & OHCI1394_cycle64Seconds) { |
1166 | cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1167 | if ((cycle_time & 0x80000000) == 0) | |
1168 | ohci->bus_seconds++; | |
1169 | } | |
1170 | ||
ed568912 KH |
1171 | return IRQ_HANDLED; |
1172 | } | |
1173 | ||
2aef469a KH |
1174 | static int software_reset(struct fw_ohci *ohci) |
1175 | { | |
1176 | int i; | |
1177 | ||
1178 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
1179 | ||
1180 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
1181 | if ((reg_read(ohci, OHCI1394_HCControlSet) & | |
1182 | OHCI1394_HCControl_softReset) == 0) | |
1183 | return 0; | |
1184 | msleep(1); | |
1185 | } | |
1186 | ||
1187 | return -EBUSY; | |
1188 | } | |
1189 | ||
ed568912 KH |
1190 | static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length) |
1191 | { | |
1192 | struct fw_ohci *ohci = fw_ohci(card); | |
1193 | struct pci_dev *dev = to_pci_dev(card->device); | |
1194 | ||
2aef469a KH |
1195 | if (software_reset(ohci)) { |
1196 | fw_error("Failed to reset ohci card.\n"); | |
1197 | return -EBUSY; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * Now enable LPS, which we need in order to start accessing | |
1202 | * most of the registers. In fact, on some cards (ALI M5251), | |
1203 | * accessing registers in the SClk domain without LPS enabled | |
1204 | * will lock up the machine. Wait 50msec to make sure we have | |
1205 | * full link enabled. | |
1206 | */ | |
1207 | reg_write(ohci, OHCI1394_HCControlSet, | |
1208 | OHCI1394_HCControl_LPS | | |
1209 | OHCI1394_HCControl_postedWriteEnable); | |
1210 | flush_writes(ohci); | |
1211 | msleep(50); | |
1212 | ||
1213 | reg_write(ohci, OHCI1394_HCControlClear, | |
1214 | OHCI1394_HCControl_noByteSwapData); | |
1215 | ||
1216 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1217 | OHCI1394_LinkControl_rcvSelfID | | |
1218 | OHCI1394_LinkControl_cycleTimerEnable | | |
1219 | OHCI1394_LinkControl_cycleMaster); | |
1220 | ||
1221 | reg_write(ohci, OHCI1394_ATRetries, | |
1222 | OHCI1394_MAX_AT_REQ_RETRIES | | |
1223 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
1224 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8)); | |
1225 | ||
1226 | ar_context_run(&ohci->ar_request_ctx); | |
1227 | ar_context_run(&ohci->ar_response_ctx); | |
1228 | ||
1229 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); | |
1230 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); | |
1231 | reg_write(ohci, OHCI1394_IntEventClear, ~0); | |
1232 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
1233 | reg_write(ohci, OHCI1394_IntMaskSet, | |
1234 | OHCI1394_selfIDComplete | | |
1235 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
1236 | OHCI1394_reqTxComplete | OHCI1394_respTxComplete | | |
1237 | OHCI1394_isochRx | OHCI1394_isochTx | | |
bb9f2206 SR |
1238 | OHCI1394_postedWriteErr | OHCI1394_cycleTooLong | |
1239 | OHCI1394_cycle64Seconds | OHCI1394_masterIntEnable); | |
2aef469a KH |
1240 | |
1241 | /* Activate link_on bit and contender bit in our self ID packets.*/ | |
1242 | if (ohci_update_phy_reg(card, 4, 0, | |
1243 | PHY_LINK_ACTIVE | PHY_CONTENDER) < 0) | |
1244 | return -EIO; | |
1245 | ||
c781c06d KH |
1246 | /* |
1247 | * When the link is not yet enabled, the atomic config rom | |
ed568912 KH |
1248 | * update mechanism described below in ohci_set_config_rom() |
1249 | * is not active. We have to update ConfigRomHeader and | |
1250 | * BusOptions manually, and the write to ConfigROMmap takes | |
1251 | * effect immediately. We tie this to the enabling of the | |
1252 | * link, so we have a valid config rom before enabling - the | |
1253 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
1254 | * values before enabling. | |
1255 | * | |
1256 | * However, when the ConfigROMmap is written, some controllers | |
1257 | * always read back quadlets 0 and 2 from the config rom to | |
1258 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
1259 | * They shouldn't do that in this initial case where the link | |
1260 | * isn't enabled. This means we have to use the same | |
1261 | * workaround here, setting the bus header to 0 and then write | |
1262 | * the right values in the bus reset tasklet. | |
1263 | */ | |
1264 | ||
0bd243c4 KH |
1265 | if (config_rom) { |
1266 | ohci->next_config_rom = | |
1267 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1268 | &ohci->next_config_rom_bus, | |
1269 | GFP_KERNEL); | |
1270 | if (ohci->next_config_rom == NULL) | |
1271 | return -ENOMEM; | |
ed568912 | 1272 | |
0bd243c4 KH |
1273 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); |
1274 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, length * 4); | |
1275 | } else { | |
1276 | /* | |
1277 | * In the suspend case, config_rom is NULL, which | |
1278 | * means that we just reuse the old config rom. | |
1279 | */ | |
1280 | ohci->next_config_rom = ohci->config_rom; | |
1281 | ohci->next_config_rom_bus = ohci->config_rom_bus; | |
1282 | } | |
ed568912 | 1283 | |
0bd243c4 | 1284 | ohci->next_header = be32_to_cpu(ohci->next_config_rom[0]); |
ed568912 KH |
1285 | ohci->next_config_rom[0] = 0; |
1286 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
0bd243c4 KH |
1287 | reg_write(ohci, OHCI1394_BusOptions, |
1288 | be32_to_cpu(ohci->next_config_rom[2])); | |
ed568912 KH |
1289 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
1290 | ||
1291 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
1292 | ||
1293 | if (request_irq(dev->irq, irq_handler, | |
65efffa8 | 1294 | IRQF_SHARED, ohci_driver_name, ohci)) { |
ed568912 KH |
1295 | fw_error("Failed to allocate shared interrupt %d.\n", |
1296 | dev->irq); | |
1297 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1298 | ohci->config_rom, ohci->config_rom_bus); | |
1299 | return -EIO; | |
1300 | } | |
1301 | ||
1302 | reg_write(ohci, OHCI1394_HCControlSet, | |
1303 | OHCI1394_HCControl_linkEnable | | |
1304 | OHCI1394_HCControl_BIBimageValid); | |
1305 | flush_writes(ohci); | |
1306 | ||
c781c06d KH |
1307 | /* |
1308 | * We are ready to go, initiate bus reset to finish the | |
1309 | * initialization. | |
1310 | */ | |
ed568912 KH |
1311 | |
1312 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
1313 | ||
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | static int | |
1318 | ohci_set_config_rom(struct fw_card *card, u32 *config_rom, size_t length) | |
1319 | { | |
1320 | struct fw_ohci *ohci; | |
1321 | unsigned long flags; | |
4eaff7d6 | 1322 | int retval = -EBUSY; |
ed568912 | 1323 | __be32 *next_config_rom; |
f5101d58 | 1324 | dma_addr_t uninitialized_var(next_config_rom_bus); |
ed568912 KH |
1325 | |
1326 | ohci = fw_ohci(card); | |
1327 | ||
c781c06d KH |
1328 | /* |
1329 | * When the OHCI controller is enabled, the config rom update | |
ed568912 KH |
1330 | * mechanism is a bit tricky, but easy enough to use. See |
1331 | * section 5.5.6 in the OHCI specification. | |
1332 | * | |
1333 | * The OHCI controller caches the new config rom address in a | |
1334 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
1335 | * for the changes to take place. When the bus reset is | |
1336 | * detected, the controller loads the new values for the | |
1337 | * ConfigRomHeader and BusOptions registers from the specified | |
1338 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
1339 | * shadow register. All automatically and atomically. | |
1340 | * | |
1341 | * Now, there's a twist to this story. The automatic load of | |
1342 | * ConfigRomHeader and BusOptions doesn't honor the | |
1343 | * noByteSwapData bit, so with a be32 config rom, the | |
1344 | * controller will load be32 values in to these registers | |
1345 | * during the atomic update, even on litte endian | |
1346 | * architectures. The workaround we use is to put a 0 in the | |
1347 | * header quadlet; 0 is endian agnostic and means that the | |
1348 | * config rom isn't ready yet. In the bus reset tasklet we | |
1349 | * then set up the real values for the two registers. | |
1350 | * | |
1351 | * We use ohci->lock to avoid racing with the code that sets | |
1352 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). | |
1353 | */ | |
1354 | ||
1355 | next_config_rom = | |
1356 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1357 | &next_config_rom_bus, GFP_KERNEL); | |
1358 | if (next_config_rom == NULL) | |
1359 | return -ENOMEM; | |
1360 | ||
1361 | spin_lock_irqsave(&ohci->lock, flags); | |
1362 | ||
1363 | if (ohci->next_config_rom == NULL) { | |
1364 | ohci->next_config_rom = next_config_rom; | |
1365 | ohci->next_config_rom_bus = next_config_rom_bus; | |
1366 | ||
1367 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); | |
1368 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, | |
1369 | length * 4); | |
1370 | ||
1371 | ohci->next_header = config_rom[0]; | |
1372 | ohci->next_config_rom[0] = 0; | |
1373 | ||
1374 | reg_write(ohci, OHCI1394_ConfigROMmap, | |
1375 | ohci->next_config_rom_bus); | |
4eaff7d6 | 1376 | retval = 0; |
ed568912 KH |
1377 | } |
1378 | ||
1379 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1380 | ||
c781c06d KH |
1381 | /* |
1382 | * Now initiate a bus reset to have the changes take | |
ed568912 KH |
1383 | * effect. We clean up the old config rom memory and DMA |
1384 | * mappings in the bus reset tasklet, since the OHCI | |
1385 | * controller could need to access it before the bus reset | |
c781c06d KH |
1386 | * takes effect. |
1387 | */ | |
ed568912 KH |
1388 | if (retval == 0) |
1389 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
4eaff7d6 SR |
1390 | else |
1391 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1392 | next_config_rom, next_config_rom_bus); | |
ed568912 KH |
1393 | |
1394 | return retval; | |
1395 | } | |
1396 | ||
1397 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
1398 | { | |
1399 | struct fw_ohci *ohci = fw_ohci(card); | |
1400 | ||
1401 | at_context_transmit(&ohci->at_request_ctx, packet); | |
1402 | } | |
1403 | ||
1404 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
1405 | { | |
1406 | struct fw_ohci *ohci = fw_ohci(card); | |
1407 | ||
1408 | at_context_transmit(&ohci->at_response_ctx, packet); | |
1409 | } | |
1410 | ||
730c32f5 KH |
1411 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
1412 | { | |
1413 | struct fw_ohci *ohci = fw_ohci(card); | |
f319b6a0 KH |
1414 | struct context *ctx = &ohci->at_request_ctx; |
1415 | struct driver_data *driver_data = packet->driver_data; | |
1416 | int retval = -ENOENT; | |
730c32f5 | 1417 | |
f319b6a0 | 1418 | tasklet_disable(&ctx->tasklet); |
730c32f5 | 1419 | |
f319b6a0 KH |
1420 | if (packet->ack != 0) |
1421 | goto out; | |
730c32f5 | 1422 | |
f319b6a0 KH |
1423 | driver_data->packet = NULL; |
1424 | packet->ack = RCODE_CANCELLED; | |
1425 | packet->callback(packet, &ohci->card, packet->ack); | |
1426 | retval = 0; | |
730c32f5 | 1427 | |
f319b6a0 KH |
1428 | out: |
1429 | tasklet_enable(&ctx->tasklet); | |
730c32f5 | 1430 | |
f319b6a0 | 1431 | return retval; |
730c32f5 KH |
1432 | } |
1433 | ||
ed568912 KH |
1434 | static int |
1435 | ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation) | |
1436 | { | |
1437 | struct fw_ohci *ohci = fw_ohci(card); | |
1438 | unsigned long flags; | |
907293d7 | 1439 | int n, retval = 0; |
ed568912 | 1440 | |
c781c06d KH |
1441 | /* |
1442 | * FIXME: Make sure this bitmask is cleared when we clear the busReset | |
1443 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. | |
1444 | */ | |
ed568912 KH |
1445 | |
1446 | spin_lock_irqsave(&ohci->lock, flags); | |
1447 | ||
1448 | if (ohci->generation != generation) { | |
1449 | retval = -ESTALE; | |
1450 | goto out; | |
1451 | } | |
1452 | ||
c781c06d KH |
1453 | /* |
1454 | * Note, if the node ID contains a non-local bus ID, physical DMA is | |
1455 | * enabled for _all_ nodes on remote buses. | |
1456 | */ | |
907293d7 SR |
1457 | |
1458 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
1459 | if (n < 32) | |
1460 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
1461 | else | |
1462 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
1463 | ||
ed568912 | 1464 | flush_writes(ohci); |
ed568912 | 1465 | out: |
6cad95fe | 1466 | spin_unlock_irqrestore(&ohci->lock, flags); |
ed568912 KH |
1467 | return retval; |
1468 | } | |
373b2edd | 1469 | |
d60d7f1d KH |
1470 | static u64 |
1471 | ohci_get_bus_time(struct fw_card *card) | |
1472 | { | |
1473 | struct fw_ohci *ohci = fw_ohci(card); | |
1474 | u32 cycle_time; | |
1475 | u64 bus_time; | |
1476 | ||
1477 | cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1478 | bus_time = ((u64) ohci->bus_seconds << 32) | cycle_time; | |
1479 | ||
1480 | return bus_time; | |
1481 | } | |
1482 | ||
d2746dc1 KH |
1483 | static int handle_ir_dualbuffer_packet(struct context *context, |
1484 | struct descriptor *d, | |
1485 | struct descriptor *last) | |
ed568912 | 1486 | { |
295e3feb KH |
1487 | struct iso_context *ctx = |
1488 | container_of(context, struct iso_context, context); | |
1489 | struct db_descriptor *db = (struct db_descriptor *) d; | |
c70dc788 | 1490 | __le32 *ir_header; |
9b32d5f3 | 1491 | size_t header_length; |
c70dc788 KH |
1492 | void *p, *end; |
1493 | int i; | |
d2746dc1 | 1494 | |
efbf390a | 1495 | if (db->first_res_count != 0 && db->second_res_count != 0) { |
0642b657 DM |
1496 | if (ctx->excess_bytes <= le16_to_cpu(db->second_req_count)) { |
1497 | /* This descriptor isn't done yet, stop iteration. */ | |
1498 | return 0; | |
1499 | } | |
1500 | ctx->excess_bytes -= le16_to_cpu(db->second_req_count); | |
1501 | } | |
295e3feb | 1502 | |
c70dc788 KH |
1503 | header_length = le16_to_cpu(db->first_req_count) - |
1504 | le16_to_cpu(db->first_res_count); | |
1505 | ||
1506 | i = ctx->header_length; | |
1507 | p = db + 1; | |
1508 | end = p + header_length; | |
1509 | while (p < end && i + ctx->base.header_size <= PAGE_SIZE) { | |
c781c06d KH |
1510 | /* |
1511 | * The iso header is byteswapped to little endian by | |
15536221 KH |
1512 | * the controller, but the remaining header quadlets |
1513 | * are big endian. We want to present all the headers | |
1514 | * as big endian, so we have to swap the first | |
c781c06d KH |
1515 | * quadlet. |
1516 | */ | |
15536221 KH |
1517 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); |
1518 | memcpy(ctx->header + i + 4, p + 8, ctx->base.header_size - 4); | |
c70dc788 | 1519 | i += ctx->base.header_size; |
0642b657 | 1520 | ctx->excess_bytes += |
efbf390a | 1521 | (le32_to_cpu(*(__le32 *)(p + 4)) >> 16) & 0xffff; |
c70dc788 KH |
1522 | p += ctx->base.header_size + 4; |
1523 | } | |
c70dc788 | 1524 | ctx->header_length = i; |
9b32d5f3 | 1525 | |
0642b657 DM |
1526 | ctx->excess_bytes -= le16_to_cpu(db->second_req_count) - |
1527 | le16_to_cpu(db->second_res_count); | |
1528 | ||
a77754a7 | 1529 | if (le16_to_cpu(db->control) & DESCRIPTOR_IRQ_ALWAYS) { |
c70dc788 KH |
1530 | ir_header = (__le32 *) (db + 1); |
1531 | ctx->base.callback(&ctx->base, | |
1532 | le32_to_cpu(ir_header[0]) & 0xffff, | |
9b32d5f3 | 1533 | ctx->header_length, ctx->header, |
295e3feb | 1534 | ctx->base.callback_data); |
9b32d5f3 KH |
1535 | ctx->header_length = 0; |
1536 | } | |
ed568912 | 1537 | |
295e3feb | 1538 | return 1; |
ed568912 KH |
1539 | } |
1540 | ||
a186b4a6 JW |
1541 | static int handle_ir_packet_per_buffer(struct context *context, |
1542 | struct descriptor *d, | |
1543 | struct descriptor *last) | |
1544 | { | |
1545 | struct iso_context *ctx = | |
1546 | container_of(context, struct iso_context, context); | |
bcee893c | 1547 | struct descriptor *pd; |
a186b4a6 | 1548 | __le32 *ir_header; |
bcee893c DM |
1549 | void *p; |
1550 | int i; | |
a186b4a6 | 1551 | |
bcee893c DM |
1552 | for (pd = d; pd <= last; pd++) { |
1553 | if (pd->transfer_status) | |
1554 | break; | |
1555 | } | |
1556 | if (pd > last) | |
a186b4a6 JW |
1557 | /* Descriptor(s) not done yet, stop iteration */ |
1558 | return 0; | |
1559 | ||
a186b4a6 | 1560 | i = ctx->header_length; |
bcee893c | 1561 | p = last + 1; |
a186b4a6 | 1562 | |
bcee893c DM |
1563 | if (ctx->base.header_size > 0 && |
1564 | i + ctx->base.header_size <= PAGE_SIZE) { | |
a186b4a6 JW |
1565 | /* |
1566 | * The iso header is byteswapped to little endian by | |
1567 | * the controller, but the remaining header quadlets | |
1568 | * are big endian. We want to present all the headers | |
1569 | * as big endian, so we have to swap the first quadlet. | |
1570 | */ | |
1571 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); | |
1572 | memcpy(ctx->header + i + 4, p + 8, ctx->base.header_size - 4); | |
bcee893c | 1573 | ctx->header_length += ctx->base.header_size; |
a186b4a6 JW |
1574 | } |
1575 | ||
bcee893c DM |
1576 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { |
1577 | ir_header = (__le32 *) p; | |
a186b4a6 JW |
1578 | ctx->base.callback(&ctx->base, |
1579 | le32_to_cpu(ir_header[0]) & 0xffff, | |
1580 | ctx->header_length, ctx->header, | |
1581 | ctx->base.callback_data); | |
1582 | ctx->header_length = 0; | |
1583 | } | |
1584 | ||
a186b4a6 JW |
1585 | return 1; |
1586 | } | |
1587 | ||
30200739 KH |
1588 | static int handle_it_packet(struct context *context, |
1589 | struct descriptor *d, | |
1590 | struct descriptor *last) | |
ed568912 | 1591 | { |
30200739 KH |
1592 | struct iso_context *ctx = |
1593 | container_of(context, struct iso_context, context); | |
373b2edd | 1594 | |
30200739 KH |
1595 | if (last->transfer_status == 0) |
1596 | /* This descriptor isn't done yet, stop iteration. */ | |
1597 | return 0; | |
1598 | ||
a77754a7 | 1599 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) |
9b32d5f3 KH |
1600 | ctx->base.callback(&ctx->base, le16_to_cpu(last->res_count), |
1601 | 0, NULL, ctx->base.callback_data); | |
30200739 KH |
1602 | |
1603 | return 1; | |
ed568912 KH |
1604 | } |
1605 | ||
30200739 | 1606 | static struct fw_iso_context * |
eb0306ea | 1607 | ohci_allocate_iso_context(struct fw_card *card, int type, size_t header_size) |
ed568912 KH |
1608 | { |
1609 | struct fw_ohci *ohci = fw_ohci(card); | |
1610 | struct iso_context *ctx, *list; | |
30200739 | 1611 | descriptor_callback_t callback; |
295e3feb | 1612 | u32 *mask, regs; |
ed568912 | 1613 | unsigned long flags; |
9b32d5f3 | 1614 | int index, retval = -ENOMEM; |
ed568912 KH |
1615 | |
1616 | if (type == FW_ISO_CONTEXT_TRANSMIT) { | |
1617 | mask = &ohci->it_context_mask; | |
1618 | list = ohci->it_context_list; | |
30200739 | 1619 | callback = handle_it_packet; |
ed568912 | 1620 | } else { |
373b2edd SR |
1621 | mask = &ohci->ir_context_mask; |
1622 | list = ohci->ir_context_list; | |
a186b4a6 JW |
1623 | if (ohci->version >= OHCI_VERSION_1_1) |
1624 | callback = handle_ir_dualbuffer_packet; | |
1625 | else | |
1626 | callback = handle_ir_packet_per_buffer; | |
ed568912 KH |
1627 | } |
1628 | ||
1629 | spin_lock_irqsave(&ohci->lock, flags); | |
1630 | index = ffs(*mask) - 1; | |
1631 | if (index >= 0) | |
1632 | *mask &= ~(1 << index); | |
1633 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1634 | ||
1635 | if (index < 0) | |
1636 | return ERR_PTR(-EBUSY); | |
1637 | ||
373b2edd SR |
1638 | if (type == FW_ISO_CONTEXT_TRANSMIT) |
1639 | regs = OHCI1394_IsoXmitContextBase(index); | |
1640 | else | |
1641 | regs = OHCI1394_IsoRcvContextBase(index); | |
1642 | ||
ed568912 | 1643 | ctx = &list[index]; |
2d826cc5 | 1644 | memset(ctx, 0, sizeof(*ctx)); |
9b32d5f3 KH |
1645 | ctx->header_length = 0; |
1646 | ctx->header = (void *) __get_free_page(GFP_KERNEL); | |
1647 | if (ctx->header == NULL) | |
1648 | goto out; | |
1649 | ||
fe5ca634 | 1650 | retval = context_init(&ctx->context, ohci, regs, callback); |
9b32d5f3 KH |
1651 | if (retval < 0) |
1652 | goto out_with_header; | |
ed568912 KH |
1653 | |
1654 | return &ctx->base; | |
9b32d5f3 KH |
1655 | |
1656 | out_with_header: | |
1657 | free_page((unsigned long)ctx->header); | |
1658 | out: | |
1659 | spin_lock_irqsave(&ohci->lock, flags); | |
1660 | *mask |= 1 << index; | |
1661 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1662 | ||
1663 | return ERR_PTR(retval); | |
ed568912 KH |
1664 | } |
1665 | ||
eb0306ea KH |
1666 | static int ohci_start_iso(struct fw_iso_context *base, |
1667 | s32 cycle, u32 sync, u32 tags) | |
ed568912 | 1668 | { |
373b2edd | 1669 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 1670 | struct fw_ohci *ohci = ctx->context.ohci; |
8a2f7d93 | 1671 | u32 control, match; |
ed568912 KH |
1672 | int index; |
1673 | ||
295e3feb KH |
1674 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { |
1675 | index = ctx - ohci->it_context_list; | |
8a2f7d93 KH |
1676 | match = 0; |
1677 | if (cycle >= 0) | |
1678 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | | |
295e3feb | 1679 | (cycle & 0x7fff) << 16; |
21efb3cf | 1680 | |
295e3feb KH |
1681 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
1682 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
8a2f7d93 | 1683 | context_run(&ctx->context, match); |
295e3feb KH |
1684 | } else { |
1685 | index = ctx - ohci->ir_context_list; | |
a186b4a6 JW |
1686 | control = IR_CONTEXT_ISOCH_HEADER; |
1687 | if (ohci->version >= OHCI_VERSION_1_1) | |
1688 | control |= IR_CONTEXT_DUAL_BUFFER_MODE; | |
8a2f7d93 KH |
1689 | match = (tags << 28) | (sync << 8) | ctx->base.channel; |
1690 | if (cycle >= 0) { | |
1691 | match |= (cycle & 0x07fff) << 12; | |
1692 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; | |
1693 | } | |
ed568912 | 1694 | |
295e3feb KH |
1695 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
1696 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); | |
a77754a7 | 1697 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
8a2f7d93 | 1698 | context_run(&ctx->context, control); |
295e3feb | 1699 | } |
ed568912 KH |
1700 | |
1701 | return 0; | |
1702 | } | |
1703 | ||
b8295668 KH |
1704 | static int ohci_stop_iso(struct fw_iso_context *base) |
1705 | { | |
1706 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 1707 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
b8295668 KH |
1708 | int index; |
1709 | ||
1710 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
1711 | index = ctx - ohci->it_context_list; | |
1712 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
1713 | } else { | |
1714 | index = ctx - ohci->ir_context_list; | |
1715 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
1716 | } | |
1717 | flush_writes(ohci); | |
1718 | context_stop(&ctx->context); | |
1719 | ||
1720 | return 0; | |
1721 | } | |
1722 | ||
ed568912 KH |
1723 | static void ohci_free_iso_context(struct fw_iso_context *base) |
1724 | { | |
1725 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 1726 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
ed568912 KH |
1727 | unsigned long flags; |
1728 | int index; | |
1729 | ||
b8295668 KH |
1730 | ohci_stop_iso(base); |
1731 | context_release(&ctx->context); | |
9b32d5f3 | 1732 | free_page((unsigned long)ctx->header); |
b8295668 | 1733 | |
ed568912 KH |
1734 | spin_lock_irqsave(&ohci->lock, flags); |
1735 | ||
1736 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
1737 | index = ctx - ohci->it_context_list; | |
ed568912 KH |
1738 | ohci->it_context_mask |= 1 << index; |
1739 | } else { | |
1740 | index = ctx - ohci->ir_context_list; | |
ed568912 KH |
1741 | ohci->ir_context_mask |= 1 << index; |
1742 | } | |
ed568912 KH |
1743 | |
1744 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1745 | } | |
1746 | ||
1747 | static int | |
295e3feb KH |
1748 | ohci_queue_iso_transmit(struct fw_iso_context *base, |
1749 | struct fw_iso_packet *packet, | |
1750 | struct fw_iso_buffer *buffer, | |
1751 | unsigned long payload) | |
ed568912 | 1752 | { |
373b2edd | 1753 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 1754 | struct descriptor *d, *last, *pd; |
ed568912 KH |
1755 | struct fw_iso_packet *p; |
1756 | __le32 *header; | |
9aad8125 | 1757 | dma_addr_t d_bus, page_bus; |
ed568912 KH |
1758 | u32 z, header_z, payload_z, irq; |
1759 | u32 payload_index, payload_end_index, next_page_index; | |
30200739 | 1760 | int page, end_page, i, length, offset; |
ed568912 | 1761 | |
c781c06d KH |
1762 | /* |
1763 | * FIXME: Cycle lost behavior should be configurable: lose | |
1764 | * packet, retransmit or terminate.. | |
1765 | */ | |
ed568912 KH |
1766 | |
1767 | p = packet; | |
9aad8125 | 1768 | payload_index = payload; |
ed568912 KH |
1769 | |
1770 | if (p->skip) | |
1771 | z = 1; | |
1772 | else | |
1773 | z = 2; | |
1774 | if (p->header_length > 0) | |
1775 | z++; | |
1776 | ||
1777 | /* Determine the first page the payload isn't contained in. */ | |
1778 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
1779 | if (p->payload_length > 0) | |
1780 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
1781 | else | |
1782 | payload_z = 0; | |
1783 | ||
1784 | z += payload_z; | |
1785 | ||
1786 | /* Get header size in number of descriptors. */ | |
2d826cc5 | 1787 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
ed568912 | 1788 | |
30200739 KH |
1789 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
1790 | if (d == NULL) | |
1791 | return -ENOMEM; | |
ed568912 KH |
1792 | |
1793 | if (!p->skip) { | |
a77754a7 | 1794 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
ed568912 KH |
1795 | d[0].req_count = cpu_to_le16(8); |
1796 | ||
1797 | header = (__le32 *) &d[1]; | |
a77754a7 KH |
1798 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
1799 | IT_HEADER_TAG(p->tag) | | |
1800 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | | |
1801 | IT_HEADER_CHANNEL(ctx->base.channel) | | |
1802 | IT_HEADER_SPEED(ctx->base.speed)); | |
ed568912 | 1803 | header[1] = |
a77754a7 | 1804 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
ed568912 KH |
1805 | p->payload_length)); |
1806 | } | |
1807 | ||
1808 | if (p->header_length > 0) { | |
1809 | d[2].req_count = cpu_to_le16(p->header_length); | |
2d826cc5 | 1810 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
ed568912 KH |
1811 | memcpy(&d[z], p->header, p->header_length); |
1812 | } | |
1813 | ||
1814 | pd = d + z - payload_z; | |
1815 | payload_end_index = payload_index + p->payload_length; | |
1816 | for (i = 0; i < payload_z; i++) { | |
1817 | page = payload_index >> PAGE_SHIFT; | |
1818 | offset = payload_index & ~PAGE_MASK; | |
1819 | next_page_index = (page + 1) << PAGE_SHIFT; | |
1820 | length = | |
1821 | min(next_page_index, payload_end_index) - payload_index; | |
1822 | pd[i].req_count = cpu_to_le16(length); | |
9aad8125 KH |
1823 | |
1824 | page_bus = page_private(buffer->pages[page]); | |
1825 | pd[i].data_address = cpu_to_le32(page_bus + offset); | |
ed568912 KH |
1826 | |
1827 | payload_index += length; | |
1828 | } | |
1829 | ||
ed568912 | 1830 | if (p->interrupt) |
a77754a7 | 1831 | irq = DESCRIPTOR_IRQ_ALWAYS; |
ed568912 | 1832 | else |
a77754a7 | 1833 | irq = DESCRIPTOR_NO_IRQ; |
ed568912 | 1834 | |
30200739 | 1835 | last = z == 2 ? d : d + z - 1; |
a77754a7 KH |
1836 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
1837 | DESCRIPTOR_STATUS | | |
1838 | DESCRIPTOR_BRANCH_ALWAYS | | |
cbb59da7 | 1839 | irq); |
ed568912 | 1840 | |
30200739 | 1841 | context_append(&ctx->context, d, z, header_z); |
ed568912 KH |
1842 | |
1843 | return 0; | |
1844 | } | |
373b2edd | 1845 | |
295e3feb | 1846 | static int |
d2746dc1 KH |
1847 | ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base, |
1848 | struct fw_iso_packet *packet, | |
1849 | struct fw_iso_buffer *buffer, | |
1850 | unsigned long payload) | |
295e3feb KH |
1851 | { |
1852 | struct iso_context *ctx = container_of(base, struct iso_context, base); | |
1853 | struct db_descriptor *db = NULL; | |
1854 | struct descriptor *d; | |
1855 | struct fw_iso_packet *p; | |
1856 | dma_addr_t d_bus, page_bus; | |
1857 | u32 z, header_z, length, rest; | |
c70dc788 | 1858 | int page, offset, packet_count, header_size; |
373b2edd | 1859 | |
c781c06d KH |
1860 | /* |
1861 | * FIXME: Cycle lost behavior should be configurable: lose | |
1862 | * packet, retransmit or terminate.. | |
1863 | */ | |
295e3feb KH |
1864 | |
1865 | p = packet; | |
1866 | z = 2; | |
1867 | ||
c781c06d KH |
1868 | /* |
1869 | * The OHCI controller puts the status word in the header | |
1870 | * buffer too, so we need 4 extra bytes per packet. | |
1871 | */ | |
c70dc788 KH |
1872 | packet_count = p->header_length / ctx->base.header_size; |
1873 | header_size = packet_count * (ctx->base.header_size + 4); | |
1874 | ||
295e3feb | 1875 | /* Get header size in number of descriptors. */ |
2d826cc5 | 1876 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); |
295e3feb KH |
1877 | page = payload >> PAGE_SHIFT; |
1878 | offset = payload & ~PAGE_MASK; | |
1879 | rest = p->payload_length; | |
1880 | ||
295e3feb KH |
1881 | /* FIXME: make packet-per-buffer/dual-buffer a context option */ |
1882 | while (rest > 0) { | |
1883 | d = context_get_descriptors(&ctx->context, | |
1884 | z + header_z, &d_bus); | |
1885 | if (d == NULL) | |
1886 | return -ENOMEM; | |
1887 | ||
1888 | db = (struct db_descriptor *) d; | |
a77754a7 KH |
1889 | db->control = cpu_to_le16(DESCRIPTOR_STATUS | |
1890 | DESCRIPTOR_BRANCH_ALWAYS); | |
c70dc788 | 1891 | db->first_size = cpu_to_le16(ctx->base.header_size + 4); |
0642b657 DM |
1892 | if (p->skip && rest == p->payload_length) { |
1893 | db->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
1894 | db->first_req_count = db->first_size; | |
1895 | } else { | |
1896 | db->first_req_count = cpu_to_le16(header_size); | |
1897 | } | |
1e1d196b | 1898 | db->first_res_count = db->first_req_count; |
2d826cc5 | 1899 | db->first_buffer = cpu_to_le32(d_bus + sizeof(*db)); |
373b2edd | 1900 | |
0642b657 DM |
1901 | if (p->skip && rest == p->payload_length) |
1902 | length = 4; | |
1903 | else if (offset + rest < PAGE_SIZE) | |
295e3feb KH |
1904 | length = rest; |
1905 | else | |
1906 | length = PAGE_SIZE - offset; | |
1907 | ||
1e1d196b KH |
1908 | db->second_req_count = cpu_to_le16(length); |
1909 | db->second_res_count = db->second_req_count; | |
295e3feb KH |
1910 | page_bus = page_private(buffer->pages[page]); |
1911 | db->second_buffer = cpu_to_le32(page_bus + offset); | |
1912 | ||
cb2d2cdb | 1913 | if (p->interrupt && length == rest) |
a77754a7 | 1914 | db->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
cb2d2cdb | 1915 | |
295e3feb KH |
1916 | context_append(&ctx->context, d, z, header_z); |
1917 | offset = (offset + length) & ~PAGE_MASK; | |
1918 | rest -= length; | |
0642b657 DM |
1919 | if (offset == 0) |
1920 | page++; | |
295e3feb KH |
1921 | } |
1922 | ||
d2746dc1 KH |
1923 | return 0; |
1924 | } | |
21efb3cf | 1925 | |
a186b4a6 JW |
1926 | static int |
1927 | ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base, | |
1928 | struct fw_iso_packet *packet, | |
1929 | struct fw_iso_buffer *buffer, | |
1930 | unsigned long payload) | |
1931 | { | |
1932 | struct iso_context *ctx = container_of(base, struct iso_context, base); | |
1933 | struct descriptor *d = NULL, *pd = NULL; | |
bcee893c | 1934 | struct fw_iso_packet *p = packet; |
a186b4a6 JW |
1935 | dma_addr_t d_bus, page_bus; |
1936 | u32 z, header_z, rest; | |
bcee893c DM |
1937 | int i, j, length; |
1938 | int page, offset, packet_count, header_size, payload_per_buffer; | |
a186b4a6 JW |
1939 | |
1940 | /* | |
1941 | * The OHCI controller puts the status word in the | |
1942 | * buffer too, so we need 4 extra bytes per packet. | |
1943 | */ | |
1944 | packet_count = p->header_length / ctx->base.header_size; | |
bcee893c | 1945 | header_size = ctx->base.header_size + 4; |
a186b4a6 JW |
1946 | |
1947 | /* Get header size in number of descriptors. */ | |
1948 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); | |
1949 | page = payload >> PAGE_SHIFT; | |
1950 | offset = payload & ~PAGE_MASK; | |
bcee893c | 1951 | payload_per_buffer = p->payload_length / packet_count; |
a186b4a6 JW |
1952 | |
1953 | for (i = 0; i < packet_count; i++) { | |
1954 | /* d points to the header descriptor */ | |
bcee893c | 1955 | z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1; |
a186b4a6 | 1956 | d = context_get_descriptors(&ctx->context, |
bcee893c | 1957 | z + header_z, &d_bus); |
a186b4a6 JW |
1958 | if (d == NULL) |
1959 | return -ENOMEM; | |
1960 | ||
bcee893c DM |
1961 | d->control = cpu_to_le16(DESCRIPTOR_STATUS | |
1962 | DESCRIPTOR_INPUT_MORE); | |
1963 | if (p->skip && i == 0) | |
1964 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
a186b4a6 JW |
1965 | d->req_count = cpu_to_le16(header_size); |
1966 | d->res_count = d->req_count; | |
bcee893c | 1967 | d->transfer_status = 0; |
a186b4a6 JW |
1968 | d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d))); |
1969 | ||
bcee893c DM |
1970 | rest = payload_per_buffer; |
1971 | for (j = 1; j < z; j++) { | |
1972 | pd = d + j; | |
1973 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | | |
1974 | DESCRIPTOR_INPUT_MORE); | |
1975 | ||
1976 | if (offset + rest < PAGE_SIZE) | |
1977 | length = rest; | |
1978 | else | |
1979 | length = PAGE_SIZE - offset; | |
1980 | pd->req_count = cpu_to_le16(length); | |
1981 | pd->res_count = pd->req_count; | |
1982 | pd->transfer_status = 0; | |
1983 | ||
1984 | page_bus = page_private(buffer->pages[page]); | |
1985 | pd->data_address = cpu_to_le32(page_bus + offset); | |
1986 | ||
1987 | offset = (offset + length) & ~PAGE_MASK; | |
1988 | rest -= length; | |
1989 | if (offset == 0) | |
1990 | page++; | |
1991 | } | |
a186b4a6 JW |
1992 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
1993 | DESCRIPTOR_INPUT_LAST | | |
1994 | DESCRIPTOR_BRANCH_ALWAYS); | |
bcee893c | 1995 | if (p->interrupt && i == packet_count - 1) |
a186b4a6 JW |
1996 | pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
1997 | ||
a186b4a6 JW |
1998 | context_append(&ctx->context, d, z, header_z); |
1999 | } | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | ||
295e3feb KH |
2004 | static int |
2005 | ohci_queue_iso(struct fw_iso_context *base, | |
2006 | struct fw_iso_packet *packet, | |
2007 | struct fw_iso_buffer *buffer, | |
2008 | unsigned long payload) | |
2009 | { | |
e364cf4e | 2010 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
fe5ca634 DM |
2011 | unsigned long flags; |
2012 | int retval; | |
e364cf4e | 2013 | |
fe5ca634 | 2014 | spin_lock_irqsave(&ctx->context.ohci->lock, flags); |
295e3feb | 2015 | if (base->type == FW_ISO_CONTEXT_TRANSMIT) |
fe5ca634 | 2016 | retval = ohci_queue_iso_transmit(base, packet, buffer, payload); |
e364cf4e | 2017 | else if (ctx->context.ohci->version >= OHCI_VERSION_1_1) |
fe5ca634 | 2018 | retval = ohci_queue_iso_receive_dualbuffer(base, packet, |
d2746dc1 | 2019 | buffer, payload); |
e364cf4e | 2020 | else |
fe5ca634 | 2021 | retval = ohci_queue_iso_receive_packet_per_buffer(base, packet, |
a186b4a6 JW |
2022 | buffer, |
2023 | payload); | |
fe5ca634 DM |
2024 | spin_unlock_irqrestore(&ctx->context.ohci->lock, flags); |
2025 | ||
2026 | return retval; | |
295e3feb KH |
2027 | } |
2028 | ||
21ebcd12 | 2029 | static const struct fw_card_driver ohci_driver = { |
ed568912 KH |
2030 | .name = ohci_driver_name, |
2031 | .enable = ohci_enable, | |
2032 | .update_phy_reg = ohci_update_phy_reg, | |
2033 | .set_config_rom = ohci_set_config_rom, | |
2034 | .send_request = ohci_send_request, | |
2035 | .send_response = ohci_send_response, | |
730c32f5 | 2036 | .cancel_packet = ohci_cancel_packet, |
ed568912 | 2037 | .enable_phys_dma = ohci_enable_phys_dma, |
d60d7f1d | 2038 | .get_bus_time = ohci_get_bus_time, |
ed568912 KH |
2039 | |
2040 | .allocate_iso_context = ohci_allocate_iso_context, | |
2041 | .free_iso_context = ohci_free_iso_context, | |
2042 | .queue_iso = ohci_queue_iso, | |
69cdb726 | 2043 | .start_iso = ohci_start_iso, |
b8295668 | 2044 | .stop_iso = ohci_stop_iso, |
ed568912 KH |
2045 | }; |
2046 | ||
ed568912 KH |
2047 | static int __devinit |
2048 | pci_probe(struct pci_dev *dev, const struct pci_device_id *ent) | |
2049 | { | |
2050 | struct fw_ohci *ohci; | |
e364cf4e | 2051 | u32 bus_options, max_receive, link_speed; |
ed568912 | 2052 | u64 guid; |
d79406dd | 2053 | int err; |
ed568912 KH |
2054 | size_t size; |
2055 | ||
ea8d006b SR |
2056 | #ifdef CONFIG_PPC_PMAC |
2057 | /* Necessary on some machines if fw-ohci was loaded/ unloaded before */ | |
2058 | if (machine_is(powermac)) { | |
2059 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2060 | ||
2061 | if (ofn) { | |
2062 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); | |
2063 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
2064 | } | |
2065 | } | |
2066 | #endif /* CONFIG_PPC_PMAC */ | |
2067 | ||
2d826cc5 | 2068 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
ed568912 KH |
2069 | if (ohci == NULL) { |
2070 | fw_error("Could not malloc fw_ohci data.\n"); | |
2071 | return -ENOMEM; | |
2072 | } | |
2073 | ||
2074 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
2075 | ||
d79406dd KH |
2076 | err = pci_enable_device(dev); |
2077 | if (err) { | |
ed568912 | 2078 | fw_error("Failed to enable OHCI hardware.\n"); |
d79406dd | 2079 | goto fail_put_card; |
ed568912 KH |
2080 | } |
2081 | ||
2082 | pci_set_master(dev); | |
2083 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
2084 | pci_set_drvdata(dev, ohci); | |
2085 | ||
11bf20ad SR |
2086 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
2087 | ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE && | |
2088 | dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW; | |
2089 | #endif | |
ed568912 KH |
2090 | spin_lock_init(&ohci->lock); |
2091 | ||
2092 | tasklet_init(&ohci->bus_reset_tasklet, | |
2093 | bus_reset_tasklet, (unsigned long)ohci); | |
2094 | ||
d79406dd KH |
2095 | err = pci_request_region(dev, 0, ohci_driver_name); |
2096 | if (err) { | |
ed568912 | 2097 | fw_error("MMIO resource unavailable\n"); |
d79406dd | 2098 | goto fail_disable; |
ed568912 KH |
2099 | } |
2100 | ||
2101 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
2102 | if (ohci->registers == NULL) { | |
2103 | fw_error("Failed to remap registers\n"); | |
d79406dd KH |
2104 | err = -ENXIO; |
2105 | goto fail_iomem; | |
ed568912 KH |
2106 | } |
2107 | ||
ed568912 KH |
2108 | ar_context_init(&ohci->ar_request_ctx, ohci, |
2109 | OHCI1394_AsReqRcvContextControlSet); | |
2110 | ||
2111 | ar_context_init(&ohci->ar_response_ctx, ohci, | |
2112 | OHCI1394_AsRspRcvContextControlSet); | |
2113 | ||
fe5ca634 | 2114 | context_init(&ohci->at_request_ctx, ohci, |
f319b6a0 | 2115 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); |
ed568912 | 2116 | |
fe5ca634 | 2117 | context_init(&ohci->at_response_ctx, ohci, |
f319b6a0 | 2118 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); |
ed568912 | 2119 | |
ed568912 KH |
2120 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
2121 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); | |
2122 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); | |
2123 | size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask); | |
2124 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); | |
2125 | ||
2126 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
2127 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); | |
2128 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); | |
2129 | size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask); | |
2130 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); | |
2131 | ||
2132 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
2133 | fw_error("Out of memory for it/ir contexts.\n"); | |
d79406dd KH |
2134 | err = -ENOMEM; |
2135 | goto fail_registers; | |
ed568912 KH |
2136 | } |
2137 | ||
2138 | /* self-id dma buffer allocation */ | |
2139 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, | |
2140 | SELF_ID_BUF_SIZE, | |
2141 | &ohci->self_id_bus, | |
2142 | GFP_KERNEL); | |
2143 | if (ohci->self_id_cpu == NULL) { | |
2144 | fw_error("Out of memory for self ID buffer.\n"); | |
d79406dd KH |
2145 | err = -ENOMEM; |
2146 | goto fail_registers; | |
ed568912 KH |
2147 | } |
2148 | ||
ed568912 KH |
2149 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
2150 | max_receive = (bus_options >> 12) & 0xf; | |
2151 | link_speed = bus_options & 0x7; | |
2152 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
2153 | reg_read(ohci, OHCI1394_GUIDLo); | |
2154 | ||
d79406dd KH |
2155 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
2156 | if (err < 0) | |
2157 | goto fail_self_id; | |
ed568912 | 2158 | |
e364cf4e | 2159 | ohci->version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
500be725 | 2160 | fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n", |
e364cf4e | 2161 | dev->dev.bus_id, ohci->version >> 16, ohci->version & 0xff); |
ed568912 | 2162 | return 0; |
d79406dd KH |
2163 | |
2164 | fail_self_id: | |
2165 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, | |
2166 | ohci->self_id_cpu, ohci->self_id_bus); | |
2167 | fail_registers: | |
2168 | kfree(ohci->it_context_list); | |
2169 | kfree(ohci->ir_context_list); | |
2170 | pci_iounmap(dev, ohci->registers); | |
2171 | fail_iomem: | |
2172 | pci_release_region(dev, 0); | |
2173 | fail_disable: | |
2174 | pci_disable_device(dev); | |
2175 | fail_put_card: | |
2176 | fw_card_put(&ohci->card); | |
2177 | ||
2178 | return err; | |
ed568912 KH |
2179 | } |
2180 | ||
2181 | static void pci_remove(struct pci_dev *dev) | |
2182 | { | |
2183 | struct fw_ohci *ohci; | |
2184 | ||
2185 | ohci = pci_get_drvdata(dev); | |
e254a4b4 KH |
2186 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
2187 | flush_writes(ohci); | |
ed568912 KH |
2188 | fw_core_remove_card(&ohci->card); |
2189 | ||
c781c06d KH |
2190 | /* |
2191 | * FIXME: Fail all pending packets here, now that the upper | |
2192 | * layers can't queue any more. | |
2193 | */ | |
ed568912 KH |
2194 | |
2195 | software_reset(ohci); | |
2196 | free_irq(dev->irq, ohci); | |
d79406dd KH |
2197 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
2198 | ohci->self_id_cpu, ohci->self_id_bus); | |
2199 | kfree(ohci->it_context_list); | |
2200 | kfree(ohci->ir_context_list); | |
2201 | pci_iounmap(dev, ohci->registers); | |
2202 | pci_release_region(dev, 0); | |
2203 | pci_disable_device(dev); | |
2204 | fw_card_put(&ohci->card); | |
ed568912 | 2205 | |
ea8d006b SR |
2206 | #ifdef CONFIG_PPC_PMAC |
2207 | /* On UniNorth, power down the cable and turn off the chip clock | |
2208 | * to save power on laptops */ | |
2209 | if (machine_is(powermac)) { | |
2210 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2211 | ||
2212 | if (ofn) { | |
2213 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
2214 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); | |
2215 | } | |
2216 | } | |
2217 | #endif /* CONFIG_PPC_PMAC */ | |
2218 | ||
ed568912 KH |
2219 | fw_notify("Removed fw-ohci device.\n"); |
2220 | } | |
2221 | ||
2aef469a KH |
2222 | #ifdef CONFIG_PM |
2223 | static int pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2224 | { | |
2225 | struct fw_ohci *ohci = pci_get_drvdata(pdev); | |
2226 | int err; | |
2227 | ||
2228 | software_reset(ohci); | |
2229 | free_irq(pdev->irq, ohci); | |
2230 | err = pci_save_state(pdev); | |
2231 | if (err) { | |
8a8cea27 | 2232 | fw_error("pci_save_state failed\n"); |
2aef469a KH |
2233 | return err; |
2234 | } | |
2235 | err = pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
55111428 SR |
2236 | if (err) |
2237 | fw_error("pci_set_power_state failed with %d\n", err); | |
2aef469a | 2238 | |
ea8d006b SR |
2239 | /* PowerMac suspend code comes last */ |
2240 | #ifdef CONFIG_PPC_PMAC | |
2241 | if (machine_is(powermac)) { | |
2242 | struct device_node *ofn = pci_device_to_OF_node(pdev); | |
2243 | ||
2244 | if (ofn) | |
2245 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
2246 | } | |
2247 | #endif /* CONFIG_PPC_PMAC */ | |
2248 | ||
2aef469a KH |
2249 | return 0; |
2250 | } | |
2251 | ||
2252 | static int pci_resume(struct pci_dev *pdev) | |
2253 | { | |
2254 | struct fw_ohci *ohci = pci_get_drvdata(pdev); | |
2255 | int err; | |
2256 | ||
ea8d006b SR |
2257 | /* PowerMac resume code comes first */ |
2258 | #ifdef CONFIG_PPC_PMAC | |
2259 | if (machine_is(powermac)) { | |
2260 | struct device_node *ofn = pci_device_to_OF_node(pdev); | |
2261 | ||
2262 | if (ofn) | |
2263 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
2264 | } | |
2265 | #endif /* CONFIG_PPC_PMAC */ | |
2266 | ||
2aef469a KH |
2267 | pci_set_power_state(pdev, PCI_D0); |
2268 | pci_restore_state(pdev); | |
2269 | err = pci_enable_device(pdev); | |
2270 | if (err) { | |
8a8cea27 | 2271 | fw_error("pci_enable_device failed\n"); |
2aef469a KH |
2272 | return err; |
2273 | } | |
2274 | ||
0bd243c4 | 2275 | return ohci_enable(&ohci->card, NULL, 0); |
2aef469a KH |
2276 | } |
2277 | #endif | |
2278 | ||
ed568912 KH |
2279 | static struct pci_device_id pci_table[] = { |
2280 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, | |
2281 | { } | |
2282 | }; | |
2283 | ||
2284 | MODULE_DEVICE_TABLE(pci, pci_table); | |
2285 | ||
2286 | static struct pci_driver fw_ohci_pci_driver = { | |
2287 | .name = ohci_driver_name, | |
2288 | .id_table = pci_table, | |
2289 | .probe = pci_probe, | |
2290 | .remove = pci_remove, | |
2aef469a KH |
2291 | #ifdef CONFIG_PM |
2292 | .resume = pci_resume, | |
2293 | .suspend = pci_suspend, | |
2294 | #endif | |
ed568912 KH |
2295 | }; |
2296 | ||
2297 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
2298 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
2299 | MODULE_LICENSE("GPL"); | |
2300 | ||
1e4c7b0d OH |
2301 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
2302 | #ifndef CONFIG_IEEE1394_OHCI1394_MODULE | |
2303 | MODULE_ALIAS("ohci1394"); | |
2304 | #endif | |
2305 | ||
ed568912 KH |
2306 | static int __init fw_ohci_init(void) |
2307 | { | |
2308 | return pci_register_driver(&fw_ohci_pci_driver); | |
2309 | } | |
2310 | ||
2311 | static void __exit fw_ohci_cleanup(void) | |
2312 | { | |
2313 | pci_unregister_driver(&fw_ohci_pci_driver); | |
2314 | } | |
2315 | ||
2316 | module_init(fw_ohci_init); | |
2317 | module_exit(fw_ohci_cleanup); |