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 | 29 | #include <linux/module.h> |
ad3c0fe8 | 30 | #include <linux/moduleparam.h> |
a7fb60db | 31 | #include <linux/pci.h> |
c26f0234 | 32 | #include <linux/spinlock.h> |
cf3e72fd | 33 | |
3dcdc500 | 34 | #include <asm/atomic.h> |
c26f0234 | 35 | #include <asm/page.h> |
ee71c2f9 | 36 | #include <asm/system.h> |
ed568912 | 37 | |
ea8d006b SR |
38 | #ifdef CONFIG_PPC_PMAC |
39 | #include <asm/pmac_feature.h> | |
40 | #endif | |
41 | ||
ed568912 | 42 | #include "fw-ohci.h" |
a7fb60db | 43 | #include "fw-transaction.h" |
ed568912 | 44 | |
a77754a7 KH |
45 | #define DESCRIPTOR_OUTPUT_MORE 0 |
46 | #define DESCRIPTOR_OUTPUT_LAST (1 << 12) | |
47 | #define DESCRIPTOR_INPUT_MORE (2 << 12) | |
48 | #define DESCRIPTOR_INPUT_LAST (3 << 12) | |
49 | #define DESCRIPTOR_STATUS (1 << 11) | |
50 | #define DESCRIPTOR_KEY_IMMEDIATE (2 << 8) | |
51 | #define DESCRIPTOR_PING (1 << 7) | |
52 | #define DESCRIPTOR_YY (1 << 6) | |
53 | #define DESCRIPTOR_NO_IRQ (0 << 4) | |
54 | #define DESCRIPTOR_IRQ_ERROR (1 << 4) | |
55 | #define DESCRIPTOR_IRQ_ALWAYS (3 << 4) | |
56 | #define DESCRIPTOR_BRANCH_ALWAYS (3 << 2) | |
57 | #define DESCRIPTOR_WAIT (3 << 0) | |
ed568912 KH |
58 | |
59 | struct descriptor { | |
60 | __le16 req_count; | |
61 | __le16 control; | |
62 | __le32 data_address; | |
63 | __le32 branch_address; | |
64 | __le16 res_count; | |
65 | __le16 transfer_status; | |
66 | } __attribute__((aligned(16))); | |
67 | ||
295e3feb KH |
68 | struct db_descriptor { |
69 | __le16 first_size; | |
70 | __le16 control; | |
71 | __le16 second_req_count; | |
72 | __le16 first_req_count; | |
73 | __le32 branch_address; | |
74 | __le16 second_res_count; | |
75 | __le16 first_res_count; | |
76 | __le32 reserved0; | |
77 | __le32 first_buffer; | |
78 | __le32 second_buffer; | |
79 | __le32 reserved1; | |
80 | } __attribute__((aligned(16))); | |
81 | ||
a77754a7 KH |
82 | #define CONTROL_SET(regs) (regs) |
83 | #define CONTROL_CLEAR(regs) ((regs) + 4) | |
84 | #define COMMAND_PTR(regs) ((regs) + 12) | |
85 | #define CONTEXT_MATCH(regs) ((regs) + 16) | |
72e318e0 | 86 | |
32b46093 | 87 | struct ar_buffer { |
ed568912 | 88 | struct descriptor descriptor; |
32b46093 KH |
89 | struct ar_buffer *next; |
90 | __le32 data[0]; | |
91 | }; | |
ed568912 | 92 | |
32b46093 KH |
93 | struct ar_context { |
94 | struct fw_ohci *ohci; | |
95 | struct ar_buffer *current_buffer; | |
96 | struct ar_buffer *last_buffer; | |
97 | void *pointer; | |
72e318e0 | 98 | u32 regs; |
ed568912 KH |
99 | struct tasklet_struct tasklet; |
100 | }; | |
101 | ||
30200739 KH |
102 | struct context; |
103 | ||
104 | typedef int (*descriptor_callback_t)(struct context *ctx, | |
105 | struct descriptor *d, | |
106 | struct descriptor *last); | |
fe5ca634 DM |
107 | |
108 | /* | |
109 | * A buffer that contains a block of DMA-able coherent memory used for | |
110 | * storing a portion of a DMA descriptor program. | |
111 | */ | |
112 | struct descriptor_buffer { | |
113 | struct list_head list; | |
114 | dma_addr_t buffer_bus; | |
115 | size_t buffer_size; | |
116 | size_t used; | |
117 | struct descriptor buffer[0]; | |
118 | }; | |
119 | ||
30200739 | 120 | struct context { |
373b2edd | 121 | struct fw_ohci *ohci; |
30200739 | 122 | u32 regs; |
fe5ca634 | 123 | int total_allocation; |
373b2edd | 124 | |
fe5ca634 DM |
125 | /* |
126 | * List of page-sized buffers for storing DMA descriptors. | |
127 | * Head of list contains buffers in use and tail of list contains | |
128 | * free buffers. | |
129 | */ | |
130 | struct list_head buffer_list; | |
131 | ||
132 | /* | |
133 | * Pointer to a buffer inside buffer_list that contains the tail | |
134 | * end of the current DMA program. | |
135 | */ | |
136 | struct descriptor_buffer *buffer_tail; | |
137 | ||
138 | /* | |
139 | * The descriptor containing the branch address of the first | |
140 | * descriptor that has not yet been filled by the device. | |
141 | */ | |
142 | struct descriptor *last; | |
143 | ||
144 | /* | |
145 | * The last descriptor in the DMA program. It contains the branch | |
146 | * address that must be updated upon appending a new descriptor. | |
147 | */ | |
148 | struct descriptor *prev; | |
30200739 KH |
149 | |
150 | descriptor_callback_t callback; | |
151 | ||
373b2edd | 152 | struct tasklet_struct tasklet; |
30200739 | 153 | }; |
30200739 | 154 | |
a77754a7 KH |
155 | #define IT_HEADER_SY(v) ((v) << 0) |
156 | #define IT_HEADER_TCODE(v) ((v) << 4) | |
157 | #define IT_HEADER_CHANNEL(v) ((v) << 8) | |
158 | #define IT_HEADER_TAG(v) ((v) << 14) | |
159 | #define IT_HEADER_SPEED(v) ((v) << 16) | |
160 | #define IT_HEADER_DATA_LENGTH(v) ((v) << 16) | |
ed568912 KH |
161 | |
162 | struct iso_context { | |
163 | struct fw_iso_context base; | |
30200739 | 164 | struct context context; |
0642b657 | 165 | int excess_bytes; |
9b32d5f3 KH |
166 | void *header; |
167 | size_t header_length; | |
ed568912 KH |
168 | }; |
169 | ||
170 | #define CONFIG_ROM_SIZE 1024 | |
171 | ||
172 | struct fw_ohci { | |
173 | struct fw_card card; | |
174 | ||
175 | __iomem char *registers; | |
176 | dma_addr_t self_id_bus; | |
177 | __le32 *self_id_cpu; | |
178 | struct tasklet_struct bus_reset_tasklet; | |
e636fe25 | 179 | int node_id; |
ed568912 | 180 | int generation; |
e09770db | 181 | int request_generation; /* for timestamping incoming requests */ |
3dcdc500 | 182 | atomic_t bus_seconds; |
95984f62 SR |
183 | |
184 | bool use_dualbuffer; | |
11bf20ad | 185 | bool old_uninorth; |
d34316a4 | 186 | bool bus_reset_packet_quirk; |
ed568912 | 187 | |
c781c06d KH |
188 | /* |
189 | * Spinlock for accessing fw_ohci data. Never call out of | |
190 | * this driver with this lock held. | |
191 | */ | |
ed568912 KH |
192 | spinlock_t lock; |
193 | u32 self_id_buffer[512]; | |
194 | ||
195 | /* Config rom buffers */ | |
196 | __be32 *config_rom; | |
197 | dma_addr_t config_rom_bus; | |
198 | __be32 *next_config_rom; | |
199 | dma_addr_t next_config_rom_bus; | |
200 | u32 next_header; | |
201 | ||
202 | struct ar_context ar_request_ctx; | |
203 | struct ar_context ar_response_ctx; | |
f319b6a0 KH |
204 | struct context at_request_ctx; |
205 | struct context at_response_ctx; | |
ed568912 KH |
206 | |
207 | u32 it_context_mask; | |
208 | struct iso_context *it_context_list; | |
4817ed24 | 209 | u64 ir_context_channels; |
ed568912 KH |
210 | u32 ir_context_mask; |
211 | struct iso_context *ir_context_list; | |
212 | }; | |
213 | ||
95688e97 | 214 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
ed568912 KH |
215 | { |
216 | return container_of(card, struct fw_ohci, card); | |
217 | } | |
218 | ||
295e3feb KH |
219 | #define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 |
220 | #define IR_CONTEXT_BUFFER_FILL 0x80000000 | |
221 | #define IR_CONTEXT_ISOCH_HEADER 0x40000000 | |
222 | #define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000 | |
223 | #define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000 | |
224 | #define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000 | |
ed568912 KH |
225 | |
226 | #define CONTEXT_RUN 0x8000 | |
227 | #define CONTEXT_WAKE 0x1000 | |
228 | #define CONTEXT_DEAD 0x0800 | |
229 | #define CONTEXT_ACTIVE 0x0400 | |
230 | ||
8b7b6afa | 231 | #define OHCI1394_MAX_AT_REQ_RETRIES 0xf |
ed568912 KH |
232 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 |
233 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 | |
234 | ||
235 | #define FW_OHCI_MAJOR 240 | |
236 | #define OHCI1394_REGISTER_SIZE 0x800 | |
237 | #define OHCI_LOOP_COUNT 500 | |
238 | #define OHCI1394_PCI_HCI_Control 0x40 | |
239 | #define SELF_ID_BUF_SIZE 0x800 | |
32b46093 | 240 | #define OHCI_TCODE_PHY_PACKET 0x0e |
e364cf4e | 241 | #define OHCI_VERSION_1_1 0x010010 |
0edeefd9 | 242 | |
ed568912 KH |
243 | static char ohci_driver_name[] = KBUILD_MODNAME; |
244 | ||
ad3c0fe8 SR |
245 | #ifdef CONFIG_FIREWIRE_OHCI_DEBUG |
246 | ||
a007bb85 | 247 | #define OHCI_PARAM_DEBUG_AT_AR 1 |
ad3c0fe8 | 248 | #define OHCI_PARAM_DEBUG_SELFIDS 2 |
a007bb85 SR |
249 | #define OHCI_PARAM_DEBUG_IRQS 4 |
250 | #define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */ | |
ad3c0fe8 SR |
251 | |
252 | static int param_debug; | |
253 | module_param_named(debug, param_debug, int, 0644); | |
254 | MODULE_PARM_DESC(debug, "Verbose logging (default = 0" | |
ad3c0fe8 | 255 | ", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR) |
a007bb85 SR |
256 | ", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS) |
257 | ", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS) | |
258 | ", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS) | |
ad3c0fe8 SR |
259 | ", or a combination, or all = -1)"); |
260 | ||
261 | static void log_irqs(u32 evt) | |
262 | { | |
a007bb85 SR |
263 | if (likely(!(param_debug & |
264 | (OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS)))) | |
265 | return; | |
266 | ||
267 | if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) && | |
268 | !(evt & OHCI1394_busReset)) | |
ad3c0fe8 SR |
269 | return; |
270 | ||
161b96e7 SR |
271 | fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt, |
272 | evt & OHCI1394_selfIDComplete ? " selfID" : "", | |
273 | evt & OHCI1394_RQPkt ? " AR_req" : "", | |
274 | evt & OHCI1394_RSPkt ? " AR_resp" : "", | |
275 | evt & OHCI1394_reqTxComplete ? " AT_req" : "", | |
276 | evt & OHCI1394_respTxComplete ? " AT_resp" : "", | |
277 | evt & OHCI1394_isochRx ? " IR" : "", | |
278 | evt & OHCI1394_isochTx ? " IT" : "", | |
279 | evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "", | |
280 | evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "", | |
281 | evt & OHCI1394_cycle64Seconds ? " cycle64Seconds" : "", | |
282 | evt & OHCI1394_regAccessFail ? " regAccessFail" : "", | |
283 | evt & OHCI1394_busReset ? " busReset" : "", | |
284 | evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt | | |
285 | OHCI1394_RSPkt | OHCI1394_reqTxComplete | | |
286 | OHCI1394_respTxComplete | OHCI1394_isochRx | | |
287 | OHCI1394_isochTx | OHCI1394_postedWriteErr | | |
288 | OHCI1394_cycleTooLong | OHCI1394_cycle64Seconds | | |
289 | OHCI1394_regAccessFail | OHCI1394_busReset) | |
ad3c0fe8 SR |
290 | ? " ?" : ""); |
291 | } | |
292 | ||
293 | static const char *speed[] = { | |
294 | [0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta", | |
295 | }; | |
296 | static const char *power[] = { | |
297 | [0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W", | |
298 | [4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W", | |
299 | }; | |
300 | static const char port[] = { '.', '-', 'p', 'c', }; | |
301 | ||
302 | static char _p(u32 *s, int shift) | |
303 | { | |
304 | return port[*s >> shift & 3]; | |
305 | } | |
306 | ||
08ddb2f4 | 307 | static void log_selfids(int node_id, int generation, int self_id_count, u32 *s) |
ad3c0fe8 SR |
308 | { |
309 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS))) | |
310 | return; | |
311 | ||
161b96e7 SR |
312 | fw_notify("%d selfIDs, generation %d, local node ID %04x\n", |
313 | self_id_count, generation, node_id); | |
ad3c0fe8 SR |
314 | |
315 | for (; self_id_count--; ++s) | |
316 | if ((*s & 1 << 23) == 0) | |
161b96e7 SR |
317 | fw_notify("selfID 0: %08x, phy %d [%c%c%c] " |
318 | "%s gc=%d %s %s%s%s\n", | |
319 | *s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2), | |
320 | speed[*s >> 14 & 3], *s >> 16 & 63, | |
321 | power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "", | |
322 | *s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : ""); | |
ad3c0fe8 | 323 | else |
161b96e7 SR |
324 | fw_notify("selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n", |
325 | *s, *s >> 24 & 63, | |
326 | _p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10), | |
327 | _p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2)); | |
ad3c0fe8 SR |
328 | } |
329 | ||
330 | static const char *evts[] = { | |
331 | [0x00] = "evt_no_status", [0x01] = "-reserved-", | |
332 | [0x02] = "evt_long_packet", [0x03] = "evt_missing_ack", | |
333 | [0x04] = "evt_underrun", [0x05] = "evt_overrun", | |
334 | [0x06] = "evt_descriptor_read", [0x07] = "evt_data_read", | |
335 | [0x08] = "evt_data_write", [0x09] = "evt_bus_reset", | |
336 | [0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err", | |
337 | [0x0c] = "-reserved-", [0x0d] = "-reserved-", | |
338 | [0x0e] = "evt_unknown", [0x0f] = "evt_flushed", | |
339 | [0x10] = "-reserved-", [0x11] = "ack_complete", | |
340 | [0x12] = "ack_pending ", [0x13] = "-reserved-", | |
341 | [0x14] = "ack_busy_X", [0x15] = "ack_busy_A", | |
342 | [0x16] = "ack_busy_B", [0x17] = "-reserved-", | |
343 | [0x18] = "-reserved-", [0x19] = "-reserved-", | |
344 | [0x1a] = "-reserved-", [0x1b] = "ack_tardy", | |
345 | [0x1c] = "-reserved-", [0x1d] = "ack_data_error", | |
346 | [0x1e] = "ack_type_error", [0x1f] = "-reserved-", | |
347 | [0x20] = "pending/cancelled", | |
348 | }; | |
349 | static const char *tcodes[] = { | |
350 | [0x0] = "QW req", [0x1] = "BW req", | |
351 | [0x2] = "W resp", [0x3] = "-reserved-", | |
352 | [0x4] = "QR req", [0x5] = "BR req", | |
353 | [0x6] = "QR resp", [0x7] = "BR resp", | |
354 | [0x8] = "cycle start", [0x9] = "Lk req", | |
355 | [0xa] = "async stream packet", [0xb] = "Lk resp", | |
356 | [0xc] = "-reserved-", [0xd] = "-reserved-", | |
357 | [0xe] = "link internal", [0xf] = "-reserved-", | |
358 | }; | |
359 | static const char *phys[] = { | |
360 | [0x0] = "phy config packet", [0x1] = "link-on packet", | |
361 | [0x2] = "self-id packet", [0x3] = "-reserved-", | |
362 | }; | |
363 | ||
364 | static void log_ar_at_event(char dir, int speed, u32 *header, int evt) | |
365 | { | |
366 | int tcode = header[0] >> 4 & 0xf; | |
367 | char specific[12]; | |
368 | ||
369 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR))) | |
370 | return; | |
371 | ||
372 | if (unlikely(evt >= ARRAY_SIZE(evts))) | |
373 | evt = 0x1f; | |
374 | ||
08ddb2f4 | 375 | if (evt == OHCI1394_evt_bus_reset) { |
161b96e7 SR |
376 | fw_notify("A%c evt_bus_reset, generation %d\n", |
377 | dir, (header[2] >> 16) & 0xff); | |
08ddb2f4 SR |
378 | return; |
379 | } | |
380 | ||
ad3c0fe8 | 381 | if (header[0] == ~header[1]) { |
161b96e7 SR |
382 | fw_notify("A%c %s, %s, %08x\n", |
383 | dir, evts[evt], phys[header[0] >> 30 & 0x3], header[0]); | |
ad3c0fe8 SR |
384 | return; |
385 | } | |
386 | ||
387 | switch (tcode) { | |
388 | case 0x0: case 0x6: case 0x8: | |
389 | snprintf(specific, sizeof(specific), " = %08x", | |
390 | be32_to_cpu((__force __be32)header[3])); | |
391 | break; | |
392 | case 0x1: case 0x5: case 0x7: case 0x9: case 0xb: | |
393 | snprintf(specific, sizeof(specific), " %x,%x", | |
394 | header[3] >> 16, header[3] & 0xffff); | |
395 | break; | |
396 | default: | |
397 | specific[0] = '\0'; | |
398 | } | |
399 | ||
400 | switch (tcode) { | |
401 | case 0xe: case 0xa: | |
161b96e7 | 402 | fw_notify("A%c %s, %s\n", dir, evts[evt], tcodes[tcode]); |
ad3c0fe8 SR |
403 | break; |
404 | case 0x0: case 0x1: case 0x4: case 0x5: case 0x9: | |
161b96e7 SR |
405 | fw_notify("A%c spd %x tl %02x, " |
406 | "%04x -> %04x, %s, " | |
407 | "%s, %04x%08x%s\n", | |
408 | dir, speed, header[0] >> 10 & 0x3f, | |
409 | header[1] >> 16, header[0] >> 16, evts[evt], | |
410 | tcodes[tcode], header[1] & 0xffff, header[2], specific); | |
ad3c0fe8 SR |
411 | break; |
412 | default: | |
161b96e7 SR |
413 | fw_notify("A%c spd %x tl %02x, " |
414 | "%04x -> %04x, %s, " | |
415 | "%s%s\n", | |
416 | dir, speed, header[0] >> 10 & 0x3f, | |
417 | header[1] >> 16, header[0] >> 16, evts[evt], | |
418 | tcodes[tcode], specific); | |
ad3c0fe8 SR |
419 | } |
420 | } | |
421 | ||
422 | #else | |
423 | ||
424 | #define log_irqs(evt) | |
08ddb2f4 | 425 | #define log_selfids(node_id, generation, self_id_count, sid) |
ad3c0fe8 SR |
426 | #define log_ar_at_event(dir, speed, header, evt) |
427 | ||
428 | #endif /* CONFIG_FIREWIRE_OHCI_DEBUG */ | |
429 | ||
95688e97 | 430 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
ed568912 KH |
431 | { |
432 | writel(data, ohci->registers + offset); | |
433 | } | |
434 | ||
95688e97 | 435 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
ed568912 KH |
436 | { |
437 | return readl(ohci->registers + offset); | |
438 | } | |
439 | ||
95688e97 | 440 | static inline void flush_writes(const struct fw_ohci *ohci) |
ed568912 KH |
441 | { |
442 | /* Do a dummy read to flush writes. */ | |
443 | reg_read(ohci, OHCI1394_Version); | |
444 | } | |
445 | ||
53dca511 SR |
446 | static int ohci_update_phy_reg(struct fw_card *card, int addr, |
447 | int clear_bits, int set_bits) | |
ed568912 KH |
448 | { |
449 | struct fw_ohci *ohci = fw_ohci(card); | |
450 | u32 val, old; | |
451 | ||
452 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); | |
362e901c | 453 | flush_writes(ohci); |
ed568912 KH |
454 | msleep(2); |
455 | val = reg_read(ohci, OHCI1394_PhyControl); | |
456 | if ((val & OHCI1394_PhyControl_ReadDone) == 0) { | |
457 | fw_error("failed to set phy reg bits.\n"); | |
458 | return -EBUSY; | |
459 | } | |
460 | ||
461 | old = OHCI1394_PhyControl_ReadData(val); | |
462 | old = (old & ~clear_bits) | set_bits; | |
463 | reg_write(ohci, OHCI1394_PhyControl, | |
464 | OHCI1394_PhyControl_Write(addr, old)); | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
32b46093 | 469 | static int ar_context_add_page(struct ar_context *ctx) |
ed568912 | 470 | { |
32b46093 KH |
471 | struct device *dev = ctx->ohci->card.device; |
472 | struct ar_buffer *ab; | |
f5101d58 | 473 | dma_addr_t uninitialized_var(ab_bus); |
32b46093 KH |
474 | size_t offset; |
475 | ||
bde1709a | 476 | ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC); |
32b46093 KH |
477 | if (ab == NULL) |
478 | return -ENOMEM; | |
479 | ||
a55709ba | 480 | ab->next = NULL; |
2d826cc5 | 481 | memset(&ab->descriptor, 0, sizeof(ab->descriptor)); |
a77754a7 KH |
482 | ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | |
483 | DESCRIPTOR_STATUS | | |
484 | DESCRIPTOR_BRANCH_ALWAYS); | |
32b46093 KH |
485 | offset = offsetof(struct ar_buffer, data); |
486 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); | |
487 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); | |
488 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); | |
489 | ab->descriptor.branch_address = 0; | |
490 | ||
ec839e43 | 491 | ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1); |
32b46093 KH |
492 | ctx->last_buffer->next = ab; |
493 | ctx->last_buffer = ab; | |
494 | ||
a77754a7 | 495 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
ed568912 | 496 | flush_writes(ctx->ohci); |
32b46093 KH |
497 | |
498 | return 0; | |
ed568912 KH |
499 | } |
500 | ||
a55709ba JF |
501 | static void ar_context_release(struct ar_context *ctx) |
502 | { | |
503 | struct ar_buffer *ab, *ab_next; | |
504 | size_t offset; | |
505 | dma_addr_t ab_bus; | |
506 | ||
507 | for (ab = ctx->current_buffer; ab; ab = ab_next) { | |
508 | ab_next = ab->next; | |
509 | offset = offsetof(struct ar_buffer, data); | |
510 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; | |
511 | dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
512 | ab, ab_bus); | |
513 | } | |
514 | } | |
515 | ||
11bf20ad SR |
516 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
517 | #define cond_le32_to_cpu(v) \ | |
518 | (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v)) | |
519 | #else | |
520 | #define cond_le32_to_cpu(v) le32_to_cpu(v) | |
521 | #endif | |
522 | ||
32b46093 | 523 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 524 | { |
ed568912 | 525 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
526 | struct fw_packet p; |
527 | u32 status, length, tcode; | |
43286568 | 528 | int evt; |
2639a6fb | 529 | |
11bf20ad SR |
530 | p.header[0] = cond_le32_to_cpu(buffer[0]); |
531 | p.header[1] = cond_le32_to_cpu(buffer[1]); | |
532 | p.header[2] = cond_le32_to_cpu(buffer[2]); | |
2639a6fb KH |
533 | |
534 | tcode = (p.header[0] >> 4) & 0x0f; | |
535 | switch (tcode) { | |
536 | case TCODE_WRITE_QUADLET_REQUEST: | |
537 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 538 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 539 | p.header_length = 16; |
32b46093 | 540 | p.payload_length = 0; |
2639a6fb KH |
541 | break; |
542 | ||
2639a6fb | 543 | case TCODE_READ_BLOCK_REQUEST : |
11bf20ad | 544 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
32b46093 KH |
545 | p.header_length = 16; |
546 | p.payload_length = 0; | |
547 | break; | |
548 | ||
549 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
550 | case TCODE_READ_BLOCK_RESPONSE: |
551 | case TCODE_LOCK_REQUEST: | |
552 | case TCODE_LOCK_RESPONSE: | |
11bf20ad | 553 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
2639a6fb | 554 | p.header_length = 16; |
32b46093 | 555 | p.payload_length = p.header[3] >> 16; |
2639a6fb KH |
556 | break; |
557 | ||
558 | case TCODE_WRITE_RESPONSE: | |
559 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 560 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 561 | p.header_length = 12; |
32b46093 | 562 | p.payload_length = 0; |
2639a6fb | 563 | break; |
ccff9629 SR |
564 | |
565 | default: | |
566 | /* FIXME: Stop context, discard everything, and restart? */ | |
567 | p.header_length = 0; | |
568 | p.payload_length = 0; | |
2639a6fb | 569 | } |
ed568912 | 570 | |
32b46093 KH |
571 | p.payload = (void *) buffer + p.header_length; |
572 | ||
573 | /* FIXME: What to do about evt_* errors? */ | |
574 | length = (p.header_length + p.payload_length + 3) / 4; | |
11bf20ad | 575 | status = cond_le32_to_cpu(buffer[length]); |
43286568 | 576 | evt = (status >> 16) & 0x1f; |
32b46093 | 577 | |
43286568 | 578 | p.ack = evt - 16; |
32b46093 KH |
579 | p.speed = (status >> 21) & 0x7; |
580 | p.timestamp = status & 0xffff; | |
581 | p.generation = ohci->request_generation; | |
ed568912 | 582 | |
43286568 | 583 | log_ar_at_event('R', p.speed, p.header, evt); |
ad3c0fe8 | 584 | |
c781c06d KH |
585 | /* |
586 | * The OHCI bus reset handler synthesizes a phy packet with | |
ed568912 KH |
587 | * the new generation number when a bus reset happens (see |
588 | * section 8.4.2.3). This helps us determine when a request | |
589 | * was received and make sure we send the response in the same | |
590 | * generation. We only need this for requests; for responses | |
591 | * we use the unique tlabel for finding the matching | |
c781c06d | 592 | * request. |
d34316a4 SR |
593 | * |
594 | * Alas some chips sometimes emit bus reset packets with a | |
595 | * wrong generation. We set the correct generation for these | |
596 | * at a slightly incorrect time (in bus_reset_tasklet). | |
c781c06d | 597 | */ |
d34316a4 SR |
598 | if (evt == OHCI1394_evt_bus_reset) { |
599 | if (!ohci->bus_reset_packet_quirk) | |
600 | ohci->request_generation = (p.header[2] >> 16) & 0xff; | |
601 | } else if (ctx == &ohci->ar_request_ctx) { | |
2639a6fb | 602 | fw_core_handle_request(&ohci->card, &p); |
d34316a4 | 603 | } else { |
2639a6fb | 604 | fw_core_handle_response(&ohci->card, &p); |
d34316a4 | 605 | } |
ed568912 | 606 | |
32b46093 KH |
607 | return buffer + length + 1; |
608 | } | |
ed568912 | 609 | |
32b46093 KH |
610 | static void ar_context_tasklet(unsigned long data) |
611 | { | |
612 | struct ar_context *ctx = (struct ar_context *)data; | |
613 | struct fw_ohci *ohci = ctx->ohci; | |
614 | struct ar_buffer *ab; | |
615 | struct descriptor *d; | |
616 | void *buffer, *end; | |
617 | ||
618 | ab = ctx->current_buffer; | |
619 | d = &ab->descriptor; | |
620 | ||
621 | if (d->res_count == 0) { | |
622 | size_t size, rest, offset; | |
6b84236d JW |
623 | dma_addr_t start_bus; |
624 | void *start; | |
32b46093 | 625 | |
c781c06d KH |
626 | /* |
627 | * This descriptor is finished and we may have a | |
32b46093 | 628 | * packet split across this and the next buffer. We |
c781c06d KH |
629 | * reuse the page for reassembling the split packet. |
630 | */ | |
32b46093 KH |
631 | |
632 | offset = offsetof(struct ar_buffer, data); | |
6b84236d JW |
633 | start = buffer = ab; |
634 | start_bus = le32_to_cpu(ab->descriptor.data_address) - offset; | |
32b46093 | 635 | |
32b46093 KH |
636 | ab = ab->next; |
637 | d = &ab->descriptor; | |
638 | size = buffer + PAGE_SIZE - ctx->pointer; | |
639 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); | |
640 | memmove(buffer, ctx->pointer, size); | |
641 | memcpy(buffer + size, ab->data, rest); | |
642 | ctx->current_buffer = ab; | |
643 | ctx->pointer = (void *) ab->data + rest; | |
644 | end = buffer + size + rest; | |
645 | ||
646 | while (buffer < end) | |
647 | buffer = handle_ar_packet(ctx, buffer); | |
648 | ||
bde1709a | 649 | dma_free_coherent(ohci->card.device, PAGE_SIZE, |
6b84236d | 650 | start, start_bus); |
32b46093 KH |
651 | ar_context_add_page(ctx); |
652 | } else { | |
653 | buffer = ctx->pointer; | |
654 | ctx->pointer = end = | |
655 | (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); | |
656 | ||
657 | while (buffer < end) | |
658 | buffer = handle_ar_packet(ctx, buffer); | |
659 | } | |
ed568912 KH |
660 | } |
661 | ||
53dca511 SR |
662 | static int ar_context_init(struct ar_context *ctx, |
663 | struct fw_ohci *ohci, u32 regs) | |
ed568912 | 664 | { |
32b46093 | 665 | struct ar_buffer ab; |
ed568912 | 666 | |
72e318e0 KH |
667 | ctx->regs = regs; |
668 | ctx->ohci = ohci; | |
669 | ctx->last_buffer = &ab; | |
ed568912 KH |
670 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
671 | ||
32b46093 KH |
672 | ar_context_add_page(ctx); |
673 | ar_context_add_page(ctx); | |
674 | ctx->current_buffer = ab.next; | |
675 | ctx->pointer = ctx->current_buffer->data; | |
676 | ||
2aef469a KH |
677 | return 0; |
678 | } | |
679 | ||
680 | static void ar_context_run(struct ar_context *ctx) | |
681 | { | |
682 | struct ar_buffer *ab = ctx->current_buffer; | |
683 | dma_addr_t ab_bus; | |
684 | size_t offset; | |
685 | ||
686 | offset = offsetof(struct ar_buffer, data); | |
0a9972ba | 687 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
2aef469a KH |
688 | |
689 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1); | |
a77754a7 | 690 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
32b46093 | 691 | flush_writes(ctx->ohci); |
ed568912 | 692 | } |
373b2edd | 693 | |
53dca511 | 694 | static struct descriptor *find_branch_descriptor(struct descriptor *d, int z) |
a186b4a6 JW |
695 | { |
696 | int b, key; | |
697 | ||
698 | b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2; | |
699 | key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8; | |
700 | ||
701 | /* figure out which descriptor the branch address goes in */ | |
702 | if (z == 2 && (b == 3 || key == 2)) | |
703 | return d; | |
704 | else | |
705 | return d + z - 1; | |
706 | } | |
707 | ||
30200739 KH |
708 | static void context_tasklet(unsigned long data) |
709 | { | |
710 | struct context *ctx = (struct context *) data; | |
30200739 KH |
711 | struct descriptor *d, *last; |
712 | u32 address; | |
713 | int z; | |
fe5ca634 | 714 | struct descriptor_buffer *desc; |
30200739 | 715 | |
fe5ca634 DM |
716 | desc = list_entry(ctx->buffer_list.next, |
717 | struct descriptor_buffer, list); | |
718 | last = ctx->last; | |
30200739 | 719 | while (last->branch_address != 0) { |
fe5ca634 | 720 | struct descriptor_buffer *old_desc = desc; |
30200739 KH |
721 | address = le32_to_cpu(last->branch_address); |
722 | z = address & 0xf; | |
fe5ca634 DM |
723 | address &= ~0xf; |
724 | ||
725 | /* If the branch address points to a buffer outside of the | |
726 | * current buffer, advance to the next buffer. */ | |
727 | if (address < desc->buffer_bus || | |
728 | address >= desc->buffer_bus + desc->used) | |
729 | desc = list_entry(desc->list.next, | |
730 | struct descriptor_buffer, list); | |
731 | d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d); | |
a186b4a6 | 732 | last = find_branch_descriptor(d, z); |
30200739 KH |
733 | |
734 | if (!ctx->callback(ctx, d, last)) | |
735 | break; | |
736 | ||
fe5ca634 DM |
737 | if (old_desc != desc) { |
738 | /* If we've advanced to the next buffer, move the | |
739 | * previous buffer to the free list. */ | |
740 | unsigned long flags; | |
741 | old_desc->used = 0; | |
742 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
743 | list_move_tail(&old_desc->list, &ctx->buffer_list); | |
744 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); | |
745 | } | |
746 | ctx->last = last; | |
30200739 KH |
747 | } |
748 | } | |
749 | ||
fe5ca634 DM |
750 | /* |
751 | * Allocate a new buffer and add it to the list of free buffers for this | |
752 | * context. Must be called with ohci->lock held. | |
753 | */ | |
53dca511 | 754 | static int context_add_buffer(struct context *ctx) |
fe5ca634 DM |
755 | { |
756 | struct descriptor_buffer *desc; | |
f5101d58 | 757 | dma_addr_t uninitialized_var(bus_addr); |
fe5ca634 DM |
758 | int offset; |
759 | ||
760 | /* | |
761 | * 16MB of descriptors should be far more than enough for any DMA | |
762 | * program. This will catch run-away userspace or DoS attacks. | |
763 | */ | |
764 | if (ctx->total_allocation >= 16*1024*1024) | |
765 | return -ENOMEM; | |
766 | ||
767 | desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
768 | &bus_addr, GFP_ATOMIC); | |
769 | if (!desc) | |
770 | return -ENOMEM; | |
771 | ||
772 | offset = (void *)&desc->buffer - (void *)desc; | |
773 | desc->buffer_size = PAGE_SIZE - offset; | |
774 | desc->buffer_bus = bus_addr + offset; | |
775 | desc->used = 0; | |
776 | ||
777 | list_add_tail(&desc->list, &ctx->buffer_list); | |
778 | ctx->total_allocation += PAGE_SIZE; | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
53dca511 SR |
783 | static int context_init(struct context *ctx, struct fw_ohci *ohci, |
784 | u32 regs, descriptor_callback_t callback) | |
30200739 KH |
785 | { |
786 | ctx->ohci = ohci; | |
787 | ctx->regs = regs; | |
fe5ca634 DM |
788 | ctx->total_allocation = 0; |
789 | ||
790 | INIT_LIST_HEAD(&ctx->buffer_list); | |
791 | if (context_add_buffer(ctx) < 0) | |
30200739 KH |
792 | return -ENOMEM; |
793 | ||
fe5ca634 DM |
794 | ctx->buffer_tail = list_entry(ctx->buffer_list.next, |
795 | struct descriptor_buffer, list); | |
796 | ||
30200739 KH |
797 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); |
798 | ctx->callback = callback; | |
799 | ||
c781c06d KH |
800 | /* |
801 | * We put a dummy descriptor in the buffer that has a NULL | |
30200739 | 802 | * branch address and looks like it's been sent. That way we |
fe5ca634 | 803 | * have a descriptor to append DMA programs to. |
c781c06d | 804 | */ |
fe5ca634 DM |
805 | memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer)); |
806 | ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); | |
807 | ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011); | |
808 | ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer); | |
809 | ctx->last = ctx->buffer_tail->buffer; | |
810 | ctx->prev = ctx->buffer_tail->buffer; | |
30200739 KH |
811 | |
812 | return 0; | |
813 | } | |
814 | ||
53dca511 | 815 | static void context_release(struct context *ctx) |
30200739 KH |
816 | { |
817 | struct fw_card *card = &ctx->ohci->card; | |
fe5ca634 | 818 | struct descriptor_buffer *desc, *tmp; |
30200739 | 819 | |
fe5ca634 DM |
820 | list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list) |
821 | dma_free_coherent(card->device, PAGE_SIZE, desc, | |
822 | desc->buffer_bus - | |
823 | ((void *)&desc->buffer - (void *)desc)); | |
30200739 KH |
824 | } |
825 | ||
fe5ca634 | 826 | /* Must be called with ohci->lock held */ |
53dca511 SR |
827 | static struct descriptor *context_get_descriptors(struct context *ctx, |
828 | int z, dma_addr_t *d_bus) | |
30200739 | 829 | { |
fe5ca634 DM |
830 | struct descriptor *d = NULL; |
831 | struct descriptor_buffer *desc = ctx->buffer_tail; | |
832 | ||
833 | if (z * sizeof(*d) > desc->buffer_size) | |
834 | return NULL; | |
835 | ||
836 | if (z * sizeof(*d) > desc->buffer_size - desc->used) { | |
837 | /* No room for the descriptor in this buffer, so advance to the | |
838 | * next one. */ | |
30200739 | 839 | |
fe5ca634 DM |
840 | if (desc->list.next == &ctx->buffer_list) { |
841 | /* If there is no free buffer next in the list, | |
842 | * allocate one. */ | |
843 | if (context_add_buffer(ctx) < 0) | |
844 | return NULL; | |
845 | } | |
846 | desc = list_entry(desc->list.next, | |
847 | struct descriptor_buffer, list); | |
848 | ctx->buffer_tail = desc; | |
849 | } | |
30200739 | 850 | |
fe5ca634 | 851 | d = desc->buffer + desc->used / sizeof(*d); |
2d826cc5 | 852 | memset(d, 0, z * sizeof(*d)); |
fe5ca634 | 853 | *d_bus = desc->buffer_bus + desc->used; |
30200739 KH |
854 | |
855 | return d; | |
856 | } | |
857 | ||
295e3feb | 858 | static void context_run(struct context *ctx, u32 extra) |
30200739 KH |
859 | { |
860 | struct fw_ohci *ohci = ctx->ohci; | |
861 | ||
a77754a7 | 862 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
fe5ca634 | 863 | le32_to_cpu(ctx->last->branch_address)); |
a77754a7 KH |
864 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
865 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); | |
30200739 KH |
866 | flush_writes(ohci); |
867 | } | |
868 | ||
869 | static void context_append(struct context *ctx, | |
870 | struct descriptor *d, int z, int extra) | |
871 | { | |
872 | dma_addr_t d_bus; | |
fe5ca634 | 873 | struct descriptor_buffer *desc = ctx->buffer_tail; |
30200739 | 874 | |
fe5ca634 | 875 | d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d); |
30200739 | 876 | |
fe5ca634 DM |
877 | desc->used += (z + extra) * sizeof(*d); |
878 | ctx->prev->branch_address = cpu_to_le32(d_bus | z); | |
879 | ctx->prev = find_branch_descriptor(d, z); | |
30200739 | 880 | |
a77754a7 | 881 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
30200739 KH |
882 | flush_writes(ctx->ohci); |
883 | } | |
884 | ||
885 | static void context_stop(struct context *ctx) | |
886 | { | |
887 | u32 reg; | |
b8295668 | 888 | int i; |
30200739 | 889 | |
a77754a7 | 890 | reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
b8295668 | 891 | flush_writes(ctx->ohci); |
30200739 | 892 | |
b8295668 | 893 | for (i = 0; i < 10; i++) { |
a77754a7 | 894 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
b8295668 | 895 | if ((reg & CONTEXT_ACTIVE) == 0) |
b0068549 | 896 | return; |
b8295668 | 897 | |
b980f5a2 | 898 | mdelay(1); |
b8295668 | 899 | } |
b0068549 | 900 | fw_error("Error: DMA context still active (0x%08x)\n", reg); |
30200739 | 901 | } |
ed568912 | 902 | |
f319b6a0 KH |
903 | struct driver_data { |
904 | struct fw_packet *packet; | |
905 | }; | |
ed568912 | 906 | |
c781c06d KH |
907 | /* |
908 | * This function apppends a packet to the DMA queue for transmission. | |
f319b6a0 | 909 | * Must always be called with the ochi->lock held to ensure proper |
c781c06d KH |
910 | * generation handling and locking around packet queue manipulation. |
911 | */ | |
53dca511 SR |
912 | static int at_context_queue_packet(struct context *ctx, |
913 | struct fw_packet *packet) | |
ed568912 | 914 | { |
ed568912 | 915 | struct fw_ohci *ohci = ctx->ohci; |
4b6d51ec | 916 | dma_addr_t d_bus, uninitialized_var(payload_bus); |
f319b6a0 KH |
917 | struct driver_data *driver_data; |
918 | struct descriptor *d, *last; | |
919 | __le32 *header; | |
ed568912 | 920 | int z, tcode; |
f319b6a0 | 921 | u32 reg; |
ed568912 | 922 | |
f319b6a0 KH |
923 | d = context_get_descriptors(ctx, 4, &d_bus); |
924 | if (d == NULL) { | |
925 | packet->ack = RCODE_SEND_ERROR; | |
926 | return -1; | |
ed568912 KH |
927 | } |
928 | ||
a77754a7 | 929 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
f319b6a0 KH |
930 | d[0].res_count = cpu_to_le16(packet->timestamp); |
931 | ||
c781c06d KH |
932 | /* |
933 | * The DMA format for asyncronous link packets is different | |
ed568912 KH |
934 | * from the IEEE1394 layout, so shift the fields around |
935 | * accordingly. If header_length is 8, it's a PHY packet, to | |
c781c06d KH |
936 | * which we need to prepend an extra quadlet. |
937 | */ | |
f319b6a0 KH |
938 | |
939 | header = (__le32 *) &d[1]; | |
f8c2287c JF |
940 | switch (packet->header_length) { |
941 | case 16: | |
942 | case 12: | |
f319b6a0 KH |
943 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
944 | (packet->speed << 16)); | |
945 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
946 | (packet->header[0] & 0xffff0000)); | |
947 | header[2] = cpu_to_le32(packet->header[2]); | |
ed568912 KH |
948 | |
949 | tcode = (packet->header[0] >> 4) & 0x0f; | |
950 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
f319b6a0 | 951 | header[3] = cpu_to_le32(packet->header[3]); |
ed568912 | 952 | else |
f319b6a0 KH |
953 | header[3] = (__force __le32) packet->header[3]; |
954 | ||
955 | d[0].req_count = cpu_to_le16(packet->header_length); | |
f8c2287c JF |
956 | break; |
957 | ||
958 | case 8: | |
f319b6a0 KH |
959 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
960 | (packet->speed << 16)); | |
961 | header[1] = cpu_to_le32(packet->header[0]); | |
962 | header[2] = cpu_to_le32(packet->header[1]); | |
963 | d[0].req_count = cpu_to_le16(12); | |
f8c2287c JF |
964 | break; |
965 | ||
966 | case 4: | |
967 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | | |
968 | (packet->speed << 16)); | |
969 | header[1] = cpu_to_le32(packet->header[0] & 0xffff0000); | |
970 | d[0].req_count = cpu_to_le16(8); | |
971 | break; | |
972 | ||
973 | default: | |
974 | /* BUG(); */ | |
975 | packet->ack = RCODE_SEND_ERROR; | |
976 | return -1; | |
ed568912 KH |
977 | } |
978 | ||
f319b6a0 KH |
979 | driver_data = (struct driver_data *) &d[3]; |
980 | driver_data->packet = packet; | |
20d11673 | 981 | packet->driver_data = driver_data; |
a186b4a6 | 982 | |
f319b6a0 KH |
983 | if (packet->payload_length > 0) { |
984 | payload_bus = | |
985 | dma_map_single(ohci->card.device, packet->payload, | |
986 | packet->payload_length, DMA_TO_DEVICE); | |
8d8bb39b | 987 | if (dma_mapping_error(ohci->card.device, payload_bus)) { |
f319b6a0 KH |
988 | packet->ack = RCODE_SEND_ERROR; |
989 | return -1; | |
990 | } | |
1d1dc5e8 | 991 | packet->payload_bus = payload_bus; |
f319b6a0 KH |
992 | |
993 | d[2].req_count = cpu_to_le16(packet->payload_length); | |
994 | d[2].data_address = cpu_to_le32(payload_bus); | |
995 | last = &d[2]; | |
996 | z = 3; | |
ed568912 | 997 | } else { |
f319b6a0 KH |
998 | last = &d[0]; |
999 | z = 2; | |
ed568912 | 1000 | } |
ed568912 | 1001 | |
a77754a7 KH |
1002 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
1003 | DESCRIPTOR_IRQ_ALWAYS | | |
1004 | DESCRIPTOR_BRANCH_ALWAYS); | |
ed568912 | 1005 | |
76f73ca1 JW |
1006 | /* |
1007 | * If the controller and packet generations don't match, we need to | |
1008 | * bail out and try again. If IntEvent.busReset is set, the AT context | |
1009 | * is halted, so appending to the context and trying to run it is | |
1010 | * futile. Most controllers do the right thing and just flush the AT | |
1011 | * queue (per section 7.2.3.2 of the OHCI 1.1 specification), but | |
1012 | * some controllers (like a JMicron JMB381 PCI-e) misbehave and wind | |
1013 | * up stalling out. So we just bail out in software and try again | |
1014 | * later, and everyone is happy. | |
1015 | * FIXME: Document how the locking works. | |
1016 | */ | |
1017 | if (ohci->generation != packet->generation || | |
1018 | reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) { | |
ab88ca48 SR |
1019 | if (packet->payload_length > 0) |
1020 | dma_unmap_single(ohci->card.device, payload_bus, | |
1021 | packet->payload_length, DMA_TO_DEVICE); | |
f319b6a0 KH |
1022 | packet->ack = RCODE_GENERATION; |
1023 | return -1; | |
1024 | } | |
1025 | ||
1026 | context_append(ctx, d, z, 4 - z); | |
ed568912 | 1027 | |
f319b6a0 | 1028 | /* If the context isn't already running, start it up. */ |
a77754a7 | 1029 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
053b3080 | 1030 | if ((reg & CONTEXT_RUN) == 0) |
f319b6a0 KH |
1031 | context_run(ctx, 0); |
1032 | ||
1033 | return 0; | |
ed568912 KH |
1034 | } |
1035 | ||
f319b6a0 KH |
1036 | static int handle_at_packet(struct context *context, |
1037 | struct descriptor *d, | |
1038 | struct descriptor *last) | |
ed568912 | 1039 | { |
f319b6a0 | 1040 | struct driver_data *driver_data; |
ed568912 | 1041 | struct fw_packet *packet; |
f319b6a0 | 1042 | struct fw_ohci *ohci = context->ohci; |
ed568912 KH |
1043 | int evt; |
1044 | ||
f319b6a0 KH |
1045 | if (last->transfer_status == 0) |
1046 | /* This descriptor isn't done yet, stop iteration. */ | |
1047 | return 0; | |
ed568912 | 1048 | |
f319b6a0 KH |
1049 | driver_data = (struct driver_data *) &d[3]; |
1050 | packet = driver_data->packet; | |
1051 | if (packet == NULL) | |
1052 | /* This packet was cancelled, just continue. */ | |
1053 | return 1; | |
730c32f5 | 1054 | |
1d1dc5e8 SR |
1055 | if (packet->payload_bus) |
1056 | dma_unmap_single(ohci->card.device, packet->payload_bus, | |
ed568912 | 1057 | packet->payload_length, DMA_TO_DEVICE); |
ed568912 | 1058 | |
f319b6a0 KH |
1059 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
1060 | packet->timestamp = le16_to_cpu(last->res_count); | |
ed568912 | 1061 | |
ad3c0fe8 SR |
1062 | log_ar_at_event('T', packet->speed, packet->header, evt); |
1063 | ||
f319b6a0 KH |
1064 | switch (evt) { |
1065 | case OHCI1394_evt_timeout: | |
1066 | /* Async response transmit timed out. */ | |
1067 | packet->ack = RCODE_CANCELLED; | |
1068 | break; | |
ed568912 | 1069 | |
f319b6a0 | 1070 | case OHCI1394_evt_flushed: |
c781c06d KH |
1071 | /* |
1072 | * The packet was flushed should give same error as | |
1073 | * when we try to use a stale generation count. | |
1074 | */ | |
f319b6a0 KH |
1075 | packet->ack = RCODE_GENERATION; |
1076 | break; | |
ed568912 | 1077 | |
f319b6a0 | 1078 | case OHCI1394_evt_missing_ack: |
c781c06d KH |
1079 | /* |
1080 | * Using a valid (current) generation count, but the | |
1081 | * node is not on the bus or not sending acks. | |
1082 | */ | |
f319b6a0 KH |
1083 | packet->ack = RCODE_NO_ACK; |
1084 | break; | |
ed568912 | 1085 | |
f319b6a0 KH |
1086 | case ACK_COMPLETE + 0x10: |
1087 | case ACK_PENDING + 0x10: | |
1088 | case ACK_BUSY_X + 0x10: | |
1089 | case ACK_BUSY_A + 0x10: | |
1090 | case ACK_BUSY_B + 0x10: | |
1091 | case ACK_DATA_ERROR + 0x10: | |
1092 | case ACK_TYPE_ERROR + 0x10: | |
1093 | packet->ack = evt - 0x10; | |
1094 | break; | |
ed568912 | 1095 | |
f319b6a0 KH |
1096 | default: |
1097 | packet->ack = RCODE_SEND_ERROR; | |
1098 | break; | |
1099 | } | |
ed568912 | 1100 | |
f319b6a0 | 1101 | packet->callback(packet, &ohci->card, packet->ack); |
ed568912 | 1102 | |
f319b6a0 | 1103 | return 1; |
ed568912 KH |
1104 | } |
1105 | ||
a77754a7 KH |
1106 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
1107 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
1108 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
1109 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
1110 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
93c4cceb | 1111 | |
53dca511 SR |
1112 | static void handle_local_rom(struct fw_ohci *ohci, |
1113 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1114 | { |
1115 | struct fw_packet response; | |
1116 | int tcode, length, i; | |
1117 | ||
a77754a7 | 1118 | tcode = HEADER_GET_TCODE(packet->header[0]); |
93c4cceb | 1119 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
a77754a7 | 1120 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
93c4cceb KH |
1121 | else |
1122 | length = 4; | |
1123 | ||
1124 | i = csr - CSR_CONFIG_ROM; | |
1125 | if (i + length > CONFIG_ROM_SIZE) { | |
1126 | fw_fill_response(&response, packet->header, | |
1127 | RCODE_ADDRESS_ERROR, NULL, 0); | |
1128 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
1129 | fw_fill_response(&response, packet->header, | |
1130 | RCODE_TYPE_ERROR, NULL, 0); | |
1131 | } else { | |
1132 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
1133 | (void *) ohci->config_rom + i, length); | |
1134 | } | |
1135 | ||
1136 | fw_core_handle_response(&ohci->card, &response); | |
1137 | } | |
1138 | ||
53dca511 SR |
1139 | static void handle_local_lock(struct fw_ohci *ohci, |
1140 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1141 | { |
1142 | struct fw_packet response; | |
1143 | int tcode, length, ext_tcode, sel; | |
1144 | __be32 *payload, lock_old; | |
1145 | u32 lock_arg, lock_data; | |
1146 | ||
a77754a7 KH |
1147 | tcode = HEADER_GET_TCODE(packet->header[0]); |
1148 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); | |
93c4cceb | 1149 | payload = packet->payload; |
a77754a7 | 1150 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
93c4cceb KH |
1151 | |
1152 | if (tcode == TCODE_LOCK_REQUEST && | |
1153 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
1154 | lock_arg = be32_to_cpu(payload[0]); | |
1155 | lock_data = be32_to_cpu(payload[1]); | |
1156 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1157 | lock_arg = 0; | |
1158 | lock_data = 0; | |
1159 | } else { | |
1160 | fw_fill_response(&response, packet->header, | |
1161 | RCODE_TYPE_ERROR, NULL, 0); | |
1162 | goto out; | |
1163 | } | |
1164 | ||
1165 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
1166 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
1167 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
1168 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
1169 | ||
1170 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) | |
1171 | lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData)); | |
1172 | else | |
1173 | fw_notify("swap not done yet\n"); | |
1174 | ||
1175 | fw_fill_response(&response, packet->header, | |
2d826cc5 | 1176 | RCODE_COMPLETE, &lock_old, sizeof(lock_old)); |
93c4cceb KH |
1177 | out: |
1178 | fw_core_handle_response(&ohci->card, &response); | |
1179 | } | |
1180 | ||
53dca511 | 1181 | static void handle_local_request(struct context *ctx, struct fw_packet *packet) |
93c4cceb KH |
1182 | { |
1183 | u64 offset; | |
1184 | u32 csr; | |
1185 | ||
473d28c7 KH |
1186 | if (ctx == &ctx->ohci->at_request_ctx) { |
1187 | packet->ack = ACK_PENDING; | |
1188 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1189 | } | |
93c4cceb KH |
1190 | |
1191 | offset = | |
1192 | ((unsigned long long) | |
a77754a7 | 1193 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
93c4cceb KH |
1194 | packet->header[2]; |
1195 | csr = offset - CSR_REGISTER_BASE; | |
1196 | ||
1197 | /* Handle config rom reads. */ | |
1198 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
1199 | handle_local_rom(ctx->ohci, packet, csr); | |
1200 | else switch (csr) { | |
1201 | case CSR_BUS_MANAGER_ID: | |
1202 | case CSR_BANDWIDTH_AVAILABLE: | |
1203 | case CSR_CHANNELS_AVAILABLE_HI: | |
1204 | case CSR_CHANNELS_AVAILABLE_LO: | |
1205 | handle_local_lock(ctx->ohci, packet, csr); | |
1206 | break; | |
1207 | default: | |
1208 | if (ctx == &ctx->ohci->at_request_ctx) | |
1209 | fw_core_handle_request(&ctx->ohci->card, packet); | |
1210 | else | |
1211 | fw_core_handle_response(&ctx->ohci->card, packet); | |
1212 | break; | |
1213 | } | |
473d28c7 KH |
1214 | |
1215 | if (ctx == &ctx->ohci->at_response_ctx) { | |
1216 | packet->ack = ACK_COMPLETE; | |
1217 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1218 | } | |
93c4cceb | 1219 | } |
e636fe25 | 1220 | |
53dca511 | 1221 | static void at_context_transmit(struct context *ctx, struct fw_packet *packet) |
ed568912 | 1222 | { |
ed568912 | 1223 | unsigned long flags; |
2dbd7d7e | 1224 | int ret; |
ed568912 KH |
1225 | |
1226 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
1227 | ||
a77754a7 | 1228 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
e636fe25 | 1229 | ctx->ohci->generation == packet->generation) { |
93c4cceb KH |
1230 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1231 | handle_local_request(ctx, packet); | |
1232 | return; | |
e636fe25 | 1233 | } |
ed568912 | 1234 | |
2dbd7d7e | 1235 | ret = at_context_queue_packet(ctx, packet); |
ed568912 KH |
1236 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1237 | ||
2dbd7d7e | 1238 | if (ret < 0) |
f319b6a0 | 1239 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
a186b4a6 | 1240 | |
ed568912 KH |
1241 | } |
1242 | ||
1243 | static void bus_reset_tasklet(unsigned long data) | |
1244 | { | |
1245 | struct fw_ohci *ohci = (struct fw_ohci *)data; | |
e636fe25 | 1246 | int self_id_count, i, j, reg; |
ed568912 KH |
1247 | int generation, new_generation; |
1248 | unsigned long flags; | |
4eaff7d6 SR |
1249 | void *free_rom = NULL; |
1250 | dma_addr_t free_rom_bus = 0; | |
ed568912 KH |
1251 | |
1252 | reg = reg_read(ohci, OHCI1394_NodeID); | |
1253 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
02ff8f8e | 1254 | fw_notify("node ID not valid, new bus reset in progress\n"); |
ed568912 KH |
1255 | return; |
1256 | } | |
02ff8f8e SR |
1257 | if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { |
1258 | fw_notify("malconfigured bus\n"); | |
1259 | return; | |
1260 | } | |
1261 | ohci->node_id = reg & (OHCI1394_NodeID_busNumber | | |
1262 | OHCI1394_NodeID_nodeNumber); | |
ed568912 | 1263 | |
c8a9a498 SR |
1264 | reg = reg_read(ohci, OHCI1394_SelfIDCount); |
1265 | if (reg & OHCI1394_SelfIDCount_selfIDError) { | |
1266 | fw_notify("inconsistent self IDs\n"); | |
1267 | return; | |
1268 | } | |
c781c06d KH |
1269 | /* |
1270 | * The count in the SelfIDCount register is the number of | |
ed568912 KH |
1271 | * bytes in the self ID receive buffer. Since we also receive |
1272 | * the inverted quadlets and a header quadlet, we shift one | |
c781c06d KH |
1273 | * bit extra to get the actual number of self IDs. |
1274 | */ | |
c8a9a498 | 1275 | self_id_count = (reg >> 3) & 0x3ff; |
016bf3df SR |
1276 | if (self_id_count == 0) { |
1277 | fw_notify("inconsistent self IDs\n"); | |
1278 | return; | |
1279 | } | |
11bf20ad | 1280 | generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; |
ee71c2f9 | 1281 | rmb(); |
ed568912 KH |
1282 | |
1283 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
c8a9a498 SR |
1284 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) { |
1285 | fw_notify("inconsistent self IDs\n"); | |
1286 | return; | |
1287 | } | |
11bf20ad SR |
1288 | ohci->self_id_buffer[j] = |
1289 | cond_le32_to_cpu(ohci->self_id_cpu[i]); | |
ed568912 | 1290 | } |
ee71c2f9 | 1291 | rmb(); |
ed568912 | 1292 | |
c781c06d KH |
1293 | /* |
1294 | * Check the consistency of the self IDs we just read. The | |
ed568912 KH |
1295 | * problem we face is that a new bus reset can start while we |
1296 | * read out the self IDs from the DMA buffer. If this happens, | |
1297 | * the DMA buffer will be overwritten with new self IDs and we | |
1298 | * will read out inconsistent data. The OHCI specification | |
1299 | * (section 11.2) recommends a technique similar to | |
1300 | * linux/seqlock.h, where we remember the generation of the | |
1301 | * self IDs in the buffer before reading them out and compare | |
1302 | * it to the current generation after reading them out. If | |
1303 | * the two generations match we know we have a consistent set | |
c781c06d KH |
1304 | * of self IDs. |
1305 | */ | |
ed568912 KH |
1306 | |
1307 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
1308 | if (new_generation != generation) { | |
1309 | fw_notify("recursive bus reset detected, " | |
1310 | "discarding self ids\n"); | |
1311 | return; | |
1312 | } | |
1313 | ||
1314 | /* FIXME: Document how the locking works. */ | |
1315 | spin_lock_irqsave(&ohci->lock, flags); | |
1316 | ||
1317 | ohci->generation = generation; | |
f319b6a0 KH |
1318 | context_stop(&ohci->at_request_ctx); |
1319 | context_stop(&ohci->at_response_ctx); | |
ed568912 KH |
1320 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
1321 | ||
d34316a4 SR |
1322 | if (ohci->bus_reset_packet_quirk) |
1323 | ohci->request_generation = generation; | |
1324 | ||
c781c06d KH |
1325 | /* |
1326 | * This next bit is unrelated to the AT context stuff but we | |
ed568912 KH |
1327 | * have to do it under the spinlock also. If a new config rom |
1328 | * was set up before this reset, the old one is now no longer | |
1329 | * in use and we can free it. Update the config rom pointers | |
1330 | * to point to the current config rom and clear the | |
c781c06d KH |
1331 | * next_config_rom pointer so a new udpate can take place. |
1332 | */ | |
ed568912 KH |
1333 | |
1334 | if (ohci->next_config_rom != NULL) { | |
0bd243c4 KH |
1335 | if (ohci->next_config_rom != ohci->config_rom) { |
1336 | free_rom = ohci->config_rom; | |
1337 | free_rom_bus = ohci->config_rom_bus; | |
1338 | } | |
ed568912 KH |
1339 | ohci->config_rom = ohci->next_config_rom; |
1340 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
1341 | ohci->next_config_rom = NULL; | |
1342 | ||
c781c06d KH |
1343 | /* |
1344 | * Restore config_rom image and manually update | |
ed568912 KH |
1345 | * config_rom registers. Writing the header quadlet |
1346 | * will indicate that the config rom is ready, so we | |
c781c06d KH |
1347 | * do that last. |
1348 | */ | |
ed568912 KH |
1349 | reg_write(ohci, OHCI1394_BusOptions, |
1350 | be32_to_cpu(ohci->config_rom[2])); | |
1351 | ohci->config_rom[0] = cpu_to_be32(ohci->next_header); | |
1352 | reg_write(ohci, OHCI1394_ConfigROMhdr, ohci->next_header); | |
1353 | } | |
1354 | ||
080de8c2 SR |
1355 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
1356 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); | |
1357 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); | |
1358 | #endif | |
1359 | ||
ed568912 KH |
1360 | spin_unlock_irqrestore(&ohci->lock, flags); |
1361 | ||
4eaff7d6 SR |
1362 | if (free_rom) |
1363 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1364 | free_rom, free_rom_bus); | |
1365 | ||
08ddb2f4 SR |
1366 | log_selfids(ohci->node_id, generation, |
1367 | self_id_count, ohci->self_id_buffer); | |
ad3c0fe8 | 1368 | |
e636fe25 | 1369 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
ed568912 KH |
1370 | self_id_count, ohci->self_id_buffer); |
1371 | } | |
1372 | ||
1373 | static irqreturn_t irq_handler(int irq, void *data) | |
1374 | { | |
1375 | struct fw_ohci *ohci = data; | |
d60d7f1d | 1376 | u32 event, iso_event, cycle_time; |
ed568912 KH |
1377 | int i; |
1378 | ||
1379 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
1380 | ||
a515958d | 1381 | if (!event || !~event) |
ed568912 KH |
1382 | return IRQ_NONE; |
1383 | ||
a007bb85 SR |
1384 | /* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */ |
1385 | reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset); | |
ad3c0fe8 | 1386 | log_irqs(event); |
ed568912 KH |
1387 | |
1388 | if (event & OHCI1394_selfIDComplete) | |
1389 | tasklet_schedule(&ohci->bus_reset_tasklet); | |
1390 | ||
1391 | if (event & OHCI1394_RQPkt) | |
1392 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
1393 | ||
1394 | if (event & OHCI1394_RSPkt) | |
1395 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
1396 | ||
1397 | if (event & OHCI1394_reqTxComplete) | |
1398 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
1399 | ||
1400 | if (event & OHCI1394_respTxComplete) | |
1401 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
1402 | ||
c889475f | 1403 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); |
ed568912 KH |
1404 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); |
1405 | ||
1406 | while (iso_event) { | |
1407 | i = ffs(iso_event) - 1; | |
30200739 | 1408 | tasklet_schedule(&ohci->ir_context_list[i].context.tasklet); |
ed568912 KH |
1409 | iso_event &= ~(1 << i); |
1410 | } | |
1411 | ||
c889475f | 1412 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); |
ed568912 KH |
1413 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); |
1414 | ||
1415 | while (iso_event) { | |
1416 | i = ffs(iso_event) - 1; | |
30200739 | 1417 | tasklet_schedule(&ohci->it_context_list[i].context.tasklet); |
ed568912 KH |
1418 | iso_event &= ~(1 << i); |
1419 | } | |
1420 | ||
75f7832e JW |
1421 | if (unlikely(event & OHCI1394_regAccessFail)) |
1422 | fw_error("Register access failure - " | |
1423 | "please notify linux1394-devel@lists.sf.net\n"); | |
1424 | ||
e524f616 SR |
1425 | if (unlikely(event & OHCI1394_postedWriteErr)) |
1426 | fw_error("PCI posted write error\n"); | |
1427 | ||
bb9f2206 SR |
1428 | if (unlikely(event & OHCI1394_cycleTooLong)) { |
1429 | if (printk_ratelimit()) | |
1430 | fw_notify("isochronous cycle too long\n"); | |
1431 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1432 | OHCI1394_LinkControl_cycleMaster); | |
1433 | } | |
1434 | ||
d60d7f1d KH |
1435 | if (event & OHCI1394_cycle64Seconds) { |
1436 | cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1437 | if ((cycle_time & 0x80000000) == 0) | |
3dcdc500 | 1438 | atomic_inc(&ohci->bus_seconds); |
d60d7f1d KH |
1439 | } |
1440 | ||
ed568912 KH |
1441 | return IRQ_HANDLED; |
1442 | } | |
1443 | ||
2aef469a KH |
1444 | static int software_reset(struct fw_ohci *ohci) |
1445 | { | |
1446 | int i; | |
1447 | ||
1448 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
1449 | ||
1450 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
1451 | if ((reg_read(ohci, OHCI1394_HCControlSet) & | |
1452 | OHCI1394_HCControl_softReset) == 0) | |
1453 | return 0; | |
1454 | msleep(1); | |
1455 | } | |
1456 | ||
1457 | return -EBUSY; | |
1458 | } | |
1459 | ||
ed568912 KH |
1460 | static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length) |
1461 | { | |
1462 | struct fw_ohci *ohci = fw_ohci(card); | |
1463 | struct pci_dev *dev = to_pci_dev(card->device); | |
02214724 JW |
1464 | u32 lps; |
1465 | int i; | |
ed568912 | 1466 | |
2aef469a KH |
1467 | if (software_reset(ohci)) { |
1468 | fw_error("Failed to reset ohci card.\n"); | |
1469 | return -EBUSY; | |
1470 | } | |
1471 | ||
1472 | /* | |
1473 | * Now enable LPS, which we need in order to start accessing | |
1474 | * most of the registers. In fact, on some cards (ALI M5251), | |
1475 | * accessing registers in the SClk domain without LPS enabled | |
1476 | * will lock up the machine. Wait 50msec to make sure we have | |
02214724 JW |
1477 | * full link enabled. However, with some cards (well, at least |
1478 | * a JMicron PCIe card), we have to try again sometimes. | |
2aef469a KH |
1479 | */ |
1480 | reg_write(ohci, OHCI1394_HCControlSet, | |
1481 | OHCI1394_HCControl_LPS | | |
1482 | OHCI1394_HCControl_postedWriteEnable); | |
1483 | flush_writes(ohci); | |
02214724 JW |
1484 | |
1485 | for (lps = 0, i = 0; !lps && i < 3; i++) { | |
1486 | msleep(50); | |
1487 | lps = reg_read(ohci, OHCI1394_HCControlSet) & | |
1488 | OHCI1394_HCControl_LPS; | |
1489 | } | |
1490 | ||
1491 | if (!lps) { | |
1492 | fw_error("Failed to set Link Power Status\n"); | |
1493 | return -EIO; | |
1494 | } | |
2aef469a KH |
1495 | |
1496 | reg_write(ohci, OHCI1394_HCControlClear, | |
1497 | OHCI1394_HCControl_noByteSwapData); | |
1498 | ||
affc9c24 | 1499 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); |
e896ec43 SR |
1500 | reg_write(ohci, OHCI1394_LinkControlClear, |
1501 | OHCI1394_LinkControl_rcvPhyPkt); | |
2aef469a KH |
1502 | reg_write(ohci, OHCI1394_LinkControlSet, |
1503 | OHCI1394_LinkControl_rcvSelfID | | |
1504 | OHCI1394_LinkControl_cycleTimerEnable | | |
1505 | OHCI1394_LinkControl_cycleMaster); | |
1506 | ||
1507 | reg_write(ohci, OHCI1394_ATRetries, | |
1508 | OHCI1394_MAX_AT_REQ_RETRIES | | |
1509 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
1510 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8)); | |
1511 | ||
1512 | ar_context_run(&ohci->ar_request_ctx); | |
1513 | ar_context_run(&ohci->ar_response_ctx); | |
1514 | ||
2aef469a KH |
1515 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); |
1516 | reg_write(ohci, OHCI1394_IntEventClear, ~0); | |
1517 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
1518 | reg_write(ohci, OHCI1394_IntMaskSet, | |
1519 | OHCI1394_selfIDComplete | | |
1520 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
1521 | OHCI1394_reqTxComplete | OHCI1394_respTxComplete | | |
1522 | OHCI1394_isochRx | OHCI1394_isochTx | | |
bb9f2206 | 1523 | OHCI1394_postedWriteErr | OHCI1394_cycleTooLong | |
75f7832e JW |
1524 | OHCI1394_cycle64Seconds | OHCI1394_regAccessFail | |
1525 | OHCI1394_masterIntEnable); | |
a007bb85 SR |
1526 | if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) |
1527 | reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset); | |
2aef469a KH |
1528 | |
1529 | /* Activate link_on bit and contender bit in our self ID packets.*/ | |
1530 | if (ohci_update_phy_reg(card, 4, 0, | |
1531 | PHY_LINK_ACTIVE | PHY_CONTENDER) < 0) | |
1532 | return -EIO; | |
1533 | ||
c781c06d KH |
1534 | /* |
1535 | * When the link is not yet enabled, the atomic config rom | |
ed568912 KH |
1536 | * update mechanism described below in ohci_set_config_rom() |
1537 | * is not active. We have to update ConfigRomHeader and | |
1538 | * BusOptions manually, and the write to ConfigROMmap takes | |
1539 | * effect immediately. We tie this to the enabling of the | |
1540 | * link, so we have a valid config rom before enabling - the | |
1541 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
1542 | * values before enabling. | |
1543 | * | |
1544 | * However, when the ConfigROMmap is written, some controllers | |
1545 | * always read back quadlets 0 and 2 from the config rom to | |
1546 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
1547 | * They shouldn't do that in this initial case where the link | |
1548 | * isn't enabled. This means we have to use the same | |
1549 | * workaround here, setting the bus header to 0 and then write | |
1550 | * the right values in the bus reset tasklet. | |
1551 | */ | |
1552 | ||
0bd243c4 KH |
1553 | if (config_rom) { |
1554 | ohci->next_config_rom = | |
1555 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1556 | &ohci->next_config_rom_bus, | |
1557 | GFP_KERNEL); | |
1558 | if (ohci->next_config_rom == NULL) | |
1559 | return -ENOMEM; | |
ed568912 | 1560 | |
0bd243c4 KH |
1561 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); |
1562 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, length * 4); | |
1563 | } else { | |
1564 | /* | |
1565 | * In the suspend case, config_rom is NULL, which | |
1566 | * means that we just reuse the old config rom. | |
1567 | */ | |
1568 | ohci->next_config_rom = ohci->config_rom; | |
1569 | ohci->next_config_rom_bus = ohci->config_rom_bus; | |
1570 | } | |
ed568912 | 1571 | |
0bd243c4 | 1572 | ohci->next_header = be32_to_cpu(ohci->next_config_rom[0]); |
ed568912 KH |
1573 | ohci->next_config_rom[0] = 0; |
1574 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
0bd243c4 KH |
1575 | reg_write(ohci, OHCI1394_BusOptions, |
1576 | be32_to_cpu(ohci->next_config_rom[2])); | |
ed568912 KH |
1577 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
1578 | ||
1579 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
1580 | ||
1581 | if (request_irq(dev->irq, irq_handler, | |
65efffa8 | 1582 | IRQF_SHARED, ohci_driver_name, ohci)) { |
ed568912 KH |
1583 | fw_error("Failed to allocate shared interrupt %d.\n", |
1584 | dev->irq); | |
1585 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1586 | ohci->config_rom, ohci->config_rom_bus); | |
1587 | return -EIO; | |
1588 | } | |
1589 | ||
1590 | reg_write(ohci, OHCI1394_HCControlSet, | |
1591 | OHCI1394_HCControl_linkEnable | | |
1592 | OHCI1394_HCControl_BIBimageValid); | |
1593 | flush_writes(ohci); | |
1594 | ||
c781c06d KH |
1595 | /* |
1596 | * We are ready to go, initiate bus reset to finish the | |
1597 | * initialization. | |
1598 | */ | |
ed568912 KH |
1599 | |
1600 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
1601 | ||
1602 | return 0; | |
1603 | } | |
1604 | ||
53dca511 SR |
1605 | static int ohci_set_config_rom(struct fw_card *card, |
1606 | u32 *config_rom, size_t length) | |
ed568912 KH |
1607 | { |
1608 | struct fw_ohci *ohci; | |
1609 | unsigned long flags; | |
2dbd7d7e | 1610 | int ret = -EBUSY; |
ed568912 | 1611 | __be32 *next_config_rom; |
f5101d58 | 1612 | dma_addr_t uninitialized_var(next_config_rom_bus); |
ed568912 KH |
1613 | |
1614 | ohci = fw_ohci(card); | |
1615 | ||
c781c06d KH |
1616 | /* |
1617 | * When the OHCI controller is enabled, the config rom update | |
ed568912 KH |
1618 | * mechanism is a bit tricky, but easy enough to use. See |
1619 | * section 5.5.6 in the OHCI specification. | |
1620 | * | |
1621 | * The OHCI controller caches the new config rom address in a | |
1622 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
1623 | * for the changes to take place. When the bus reset is | |
1624 | * detected, the controller loads the new values for the | |
1625 | * ConfigRomHeader and BusOptions registers from the specified | |
1626 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
1627 | * shadow register. All automatically and atomically. | |
1628 | * | |
1629 | * Now, there's a twist to this story. The automatic load of | |
1630 | * ConfigRomHeader and BusOptions doesn't honor the | |
1631 | * noByteSwapData bit, so with a be32 config rom, the | |
1632 | * controller will load be32 values in to these registers | |
1633 | * during the atomic update, even on litte endian | |
1634 | * architectures. The workaround we use is to put a 0 in the | |
1635 | * header quadlet; 0 is endian agnostic and means that the | |
1636 | * config rom isn't ready yet. In the bus reset tasklet we | |
1637 | * then set up the real values for the two registers. | |
1638 | * | |
1639 | * We use ohci->lock to avoid racing with the code that sets | |
1640 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). | |
1641 | */ | |
1642 | ||
1643 | next_config_rom = | |
1644 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1645 | &next_config_rom_bus, GFP_KERNEL); | |
1646 | if (next_config_rom == NULL) | |
1647 | return -ENOMEM; | |
1648 | ||
1649 | spin_lock_irqsave(&ohci->lock, flags); | |
1650 | ||
1651 | if (ohci->next_config_rom == NULL) { | |
1652 | ohci->next_config_rom = next_config_rom; | |
1653 | ohci->next_config_rom_bus = next_config_rom_bus; | |
1654 | ||
1655 | memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE); | |
1656 | fw_memcpy_to_be32(ohci->next_config_rom, config_rom, | |
1657 | length * 4); | |
1658 | ||
1659 | ohci->next_header = config_rom[0]; | |
1660 | ohci->next_config_rom[0] = 0; | |
1661 | ||
1662 | reg_write(ohci, OHCI1394_ConfigROMmap, | |
1663 | ohci->next_config_rom_bus); | |
2dbd7d7e | 1664 | ret = 0; |
ed568912 KH |
1665 | } |
1666 | ||
1667 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1668 | ||
c781c06d KH |
1669 | /* |
1670 | * Now initiate a bus reset to have the changes take | |
ed568912 KH |
1671 | * effect. We clean up the old config rom memory and DMA |
1672 | * mappings in the bus reset tasklet, since the OHCI | |
1673 | * controller could need to access it before the bus reset | |
c781c06d KH |
1674 | * takes effect. |
1675 | */ | |
2dbd7d7e | 1676 | if (ret == 0) |
ed568912 | 1677 | fw_core_initiate_bus_reset(&ohci->card, 1); |
4eaff7d6 SR |
1678 | else |
1679 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1680 | next_config_rom, next_config_rom_bus); | |
ed568912 | 1681 | |
2dbd7d7e | 1682 | return ret; |
ed568912 KH |
1683 | } |
1684 | ||
1685 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
1686 | { | |
1687 | struct fw_ohci *ohci = fw_ohci(card); | |
1688 | ||
1689 | at_context_transmit(&ohci->at_request_ctx, packet); | |
1690 | } | |
1691 | ||
1692 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
1693 | { | |
1694 | struct fw_ohci *ohci = fw_ohci(card); | |
1695 | ||
1696 | at_context_transmit(&ohci->at_response_ctx, packet); | |
1697 | } | |
1698 | ||
730c32f5 KH |
1699 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
1700 | { | |
1701 | struct fw_ohci *ohci = fw_ohci(card); | |
f319b6a0 KH |
1702 | struct context *ctx = &ohci->at_request_ctx; |
1703 | struct driver_data *driver_data = packet->driver_data; | |
2dbd7d7e | 1704 | int ret = -ENOENT; |
730c32f5 | 1705 | |
f319b6a0 | 1706 | tasklet_disable(&ctx->tasklet); |
730c32f5 | 1707 | |
f319b6a0 KH |
1708 | if (packet->ack != 0) |
1709 | goto out; | |
730c32f5 | 1710 | |
1d1dc5e8 SR |
1711 | if (packet->payload_bus) |
1712 | dma_unmap_single(ohci->card.device, packet->payload_bus, | |
1713 | packet->payload_length, DMA_TO_DEVICE); | |
1714 | ||
ad3c0fe8 | 1715 | log_ar_at_event('T', packet->speed, packet->header, 0x20); |
f319b6a0 KH |
1716 | driver_data->packet = NULL; |
1717 | packet->ack = RCODE_CANCELLED; | |
1718 | packet->callback(packet, &ohci->card, packet->ack); | |
2dbd7d7e | 1719 | ret = 0; |
f319b6a0 KH |
1720 | out: |
1721 | tasklet_enable(&ctx->tasklet); | |
730c32f5 | 1722 | |
2dbd7d7e | 1723 | return ret; |
730c32f5 KH |
1724 | } |
1725 | ||
53dca511 SR |
1726 | static int ohci_enable_phys_dma(struct fw_card *card, |
1727 | int node_id, int generation) | |
ed568912 | 1728 | { |
080de8c2 SR |
1729 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
1730 | return 0; | |
1731 | #else | |
ed568912 KH |
1732 | struct fw_ohci *ohci = fw_ohci(card); |
1733 | unsigned long flags; | |
2dbd7d7e | 1734 | int n, ret = 0; |
ed568912 | 1735 | |
c781c06d KH |
1736 | /* |
1737 | * FIXME: Make sure this bitmask is cleared when we clear the busReset | |
1738 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. | |
1739 | */ | |
ed568912 KH |
1740 | |
1741 | spin_lock_irqsave(&ohci->lock, flags); | |
1742 | ||
1743 | if (ohci->generation != generation) { | |
2dbd7d7e | 1744 | ret = -ESTALE; |
ed568912 KH |
1745 | goto out; |
1746 | } | |
1747 | ||
c781c06d KH |
1748 | /* |
1749 | * Note, if the node ID contains a non-local bus ID, physical DMA is | |
1750 | * enabled for _all_ nodes on remote buses. | |
1751 | */ | |
907293d7 SR |
1752 | |
1753 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
1754 | if (n < 32) | |
1755 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
1756 | else | |
1757 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
1758 | ||
ed568912 | 1759 | flush_writes(ohci); |
ed568912 | 1760 | out: |
6cad95fe | 1761 | spin_unlock_irqrestore(&ohci->lock, flags); |
2dbd7d7e SR |
1762 | |
1763 | return ret; | |
080de8c2 | 1764 | #endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */ |
ed568912 | 1765 | } |
373b2edd | 1766 | |
53dca511 | 1767 | static u64 ohci_get_bus_time(struct fw_card *card) |
d60d7f1d KH |
1768 | { |
1769 | struct fw_ohci *ohci = fw_ohci(card); | |
1770 | u32 cycle_time; | |
1771 | u64 bus_time; | |
1772 | ||
1773 | cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
3dcdc500 | 1774 | bus_time = ((u64)atomic_read(&ohci->bus_seconds) << 32) | cycle_time; |
d60d7f1d KH |
1775 | |
1776 | return bus_time; | |
1777 | } | |
1778 | ||
1aa292bb DM |
1779 | static void copy_iso_headers(struct iso_context *ctx, void *p) |
1780 | { | |
1781 | int i = ctx->header_length; | |
1782 | ||
1783 | if (i + ctx->base.header_size > PAGE_SIZE) | |
1784 | return; | |
1785 | ||
1786 | /* | |
1787 | * The iso header is byteswapped to little endian by | |
1788 | * the controller, but the remaining header quadlets | |
1789 | * are big endian. We want to present all the headers | |
1790 | * as big endian, so we have to swap the first quadlet. | |
1791 | */ | |
1792 | if (ctx->base.header_size > 0) | |
1793 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); | |
1794 | if (ctx->base.header_size > 4) | |
1795 | *(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p); | |
1796 | if (ctx->base.header_size > 8) | |
1797 | memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8); | |
1798 | ctx->header_length += ctx->base.header_size; | |
1799 | } | |
1800 | ||
d2746dc1 KH |
1801 | static int handle_ir_dualbuffer_packet(struct context *context, |
1802 | struct descriptor *d, | |
1803 | struct descriptor *last) | |
ed568912 | 1804 | { |
295e3feb KH |
1805 | struct iso_context *ctx = |
1806 | container_of(context, struct iso_context, context); | |
1807 | struct db_descriptor *db = (struct db_descriptor *) d; | |
c70dc788 | 1808 | __le32 *ir_header; |
9b32d5f3 | 1809 | size_t header_length; |
c70dc788 | 1810 | void *p, *end; |
d2746dc1 | 1811 | |
efbf390a | 1812 | if (db->first_res_count != 0 && db->second_res_count != 0) { |
0642b657 DM |
1813 | if (ctx->excess_bytes <= le16_to_cpu(db->second_req_count)) { |
1814 | /* This descriptor isn't done yet, stop iteration. */ | |
1815 | return 0; | |
1816 | } | |
1817 | ctx->excess_bytes -= le16_to_cpu(db->second_req_count); | |
1818 | } | |
295e3feb | 1819 | |
c70dc788 KH |
1820 | header_length = le16_to_cpu(db->first_req_count) - |
1821 | le16_to_cpu(db->first_res_count); | |
1822 | ||
c70dc788 KH |
1823 | p = db + 1; |
1824 | end = p + header_length; | |
1aa292bb DM |
1825 | while (p < end) { |
1826 | copy_iso_headers(ctx, p); | |
0642b657 | 1827 | ctx->excess_bytes += |
efbf390a | 1828 | (le32_to_cpu(*(__le32 *)(p + 4)) >> 16) & 0xffff; |
1aa292bb | 1829 | p += max(ctx->base.header_size, (size_t)8); |
c70dc788 | 1830 | } |
9b32d5f3 | 1831 | |
0642b657 DM |
1832 | ctx->excess_bytes -= le16_to_cpu(db->second_req_count) - |
1833 | le16_to_cpu(db->second_res_count); | |
1834 | ||
a77754a7 | 1835 | if (le16_to_cpu(db->control) & DESCRIPTOR_IRQ_ALWAYS) { |
c70dc788 KH |
1836 | ir_header = (__le32 *) (db + 1); |
1837 | ctx->base.callback(&ctx->base, | |
1838 | le32_to_cpu(ir_header[0]) & 0xffff, | |
9b32d5f3 | 1839 | ctx->header_length, ctx->header, |
295e3feb | 1840 | ctx->base.callback_data); |
9b32d5f3 KH |
1841 | ctx->header_length = 0; |
1842 | } | |
ed568912 | 1843 | |
295e3feb | 1844 | return 1; |
ed568912 KH |
1845 | } |
1846 | ||
a186b4a6 JW |
1847 | static int handle_ir_packet_per_buffer(struct context *context, |
1848 | struct descriptor *d, | |
1849 | struct descriptor *last) | |
1850 | { | |
1851 | struct iso_context *ctx = | |
1852 | container_of(context, struct iso_context, context); | |
bcee893c | 1853 | struct descriptor *pd; |
a186b4a6 | 1854 | __le32 *ir_header; |
bcee893c | 1855 | void *p; |
a186b4a6 | 1856 | |
bcee893c DM |
1857 | for (pd = d; pd <= last; pd++) { |
1858 | if (pd->transfer_status) | |
1859 | break; | |
1860 | } | |
1861 | if (pd > last) | |
a186b4a6 JW |
1862 | /* Descriptor(s) not done yet, stop iteration */ |
1863 | return 0; | |
1864 | ||
1aa292bb DM |
1865 | p = last + 1; |
1866 | copy_iso_headers(ctx, p); | |
a186b4a6 | 1867 | |
bcee893c DM |
1868 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { |
1869 | ir_header = (__le32 *) p; | |
a186b4a6 JW |
1870 | ctx->base.callback(&ctx->base, |
1871 | le32_to_cpu(ir_header[0]) & 0xffff, | |
1872 | ctx->header_length, ctx->header, | |
1873 | ctx->base.callback_data); | |
1874 | ctx->header_length = 0; | |
1875 | } | |
1876 | ||
a186b4a6 JW |
1877 | return 1; |
1878 | } | |
1879 | ||
30200739 KH |
1880 | static int handle_it_packet(struct context *context, |
1881 | struct descriptor *d, | |
1882 | struct descriptor *last) | |
ed568912 | 1883 | { |
30200739 KH |
1884 | struct iso_context *ctx = |
1885 | container_of(context, struct iso_context, context); | |
373b2edd | 1886 | |
30200739 KH |
1887 | if (last->transfer_status == 0) |
1888 | /* This descriptor isn't done yet, stop iteration. */ | |
1889 | return 0; | |
1890 | ||
a77754a7 | 1891 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) |
9b32d5f3 KH |
1892 | ctx->base.callback(&ctx->base, le16_to_cpu(last->res_count), |
1893 | 0, NULL, ctx->base.callback_data); | |
30200739 KH |
1894 | |
1895 | return 1; | |
ed568912 KH |
1896 | } |
1897 | ||
53dca511 | 1898 | static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, |
4817ed24 | 1899 | int type, int channel, size_t header_size) |
ed568912 KH |
1900 | { |
1901 | struct fw_ohci *ohci = fw_ohci(card); | |
1902 | struct iso_context *ctx, *list; | |
30200739 | 1903 | descriptor_callback_t callback; |
4817ed24 | 1904 | u64 *channels, dont_care = ~0ULL; |
295e3feb | 1905 | u32 *mask, regs; |
ed568912 | 1906 | unsigned long flags; |
2dbd7d7e | 1907 | int index, ret = -ENOMEM; |
ed568912 KH |
1908 | |
1909 | if (type == FW_ISO_CONTEXT_TRANSMIT) { | |
4817ed24 | 1910 | channels = &dont_care; |
ed568912 KH |
1911 | mask = &ohci->it_context_mask; |
1912 | list = ohci->it_context_list; | |
30200739 | 1913 | callback = handle_it_packet; |
ed568912 | 1914 | } else { |
4817ed24 | 1915 | channels = &ohci->ir_context_channels; |
373b2edd SR |
1916 | mask = &ohci->ir_context_mask; |
1917 | list = ohci->ir_context_list; | |
95984f62 | 1918 | if (ohci->use_dualbuffer) |
a186b4a6 JW |
1919 | callback = handle_ir_dualbuffer_packet; |
1920 | else | |
1921 | callback = handle_ir_packet_per_buffer; | |
ed568912 KH |
1922 | } |
1923 | ||
1924 | spin_lock_irqsave(&ohci->lock, flags); | |
4817ed24 SR |
1925 | index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1; |
1926 | if (index >= 0) { | |
1927 | *channels &= ~(1ULL << channel); | |
ed568912 | 1928 | *mask &= ~(1 << index); |
4817ed24 | 1929 | } |
ed568912 KH |
1930 | spin_unlock_irqrestore(&ohci->lock, flags); |
1931 | ||
1932 | if (index < 0) | |
1933 | return ERR_PTR(-EBUSY); | |
1934 | ||
373b2edd SR |
1935 | if (type == FW_ISO_CONTEXT_TRANSMIT) |
1936 | regs = OHCI1394_IsoXmitContextBase(index); | |
1937 | else | |
1938 | regs = OHCI1394_IsoRcvContextBase(index); | |
1939 | ||
ed568912 | 1940 | ctx = &list[index]; |
2d826cc5 | 1941 | memset(ctx, 0, sizeof(*ctx)); |
9b32d5f3 KH |
1942 | ctx->header_length = 0; |
1943 | ctx->header = (void *) __get_free_page(GFP_KERNEL); | |
1944 | if (ctx->header == NULL) | |
1945 | goto out; | |
1946 | ||
2dbd7d7e SR |
1947 | ret = context_init(&ctx->context, ohci, regs, callback); |
1948 | if (ret < 0) | |
9b32d5f3 | 1949 | goto out_with_header; |
ed568912 KH |
1950 | |
1951 | return &ctx->base; | |
9b32d5f3 KH |
1952 | |
1953 | out_with_header: | |
1954 | free_page((unsigned long)ctx->header); | |
1955 | out: | |
1956 | spin_lock_irqsave(&ohci->lock, flags); | |
1957 | *mask |= 1 << index; | |
1958 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1959 | ||
2dbd7d7e | 1960 | return ERR_PTR(ret); |
ed568912 KH |
1961 | } |
1962 | ||
eb0306ea KH |
1963 | static int ohci_start_iso(struct fw_iso_context *base, |
1964 | s32 cycle, u32 sync, u32 tags) | |
ed568912 | 1965 | { |
373b2edd | 1966 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 1967 | struct fw_ohci *ohci = ctx->context.ohci; |
8a2f7d93 | 1968 | u32 control, match; |
ed568912 KH |
1969 | int index; |
1970 | ||
295e3feb KH |
1971 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { |
1972 | index = ctx - ohci->it_context_list; | |
8a2f7d93 KH |
1973 | match = 0; |
1974 | if (cycle >= 0) | |
1975 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | | |
295e3feb | 1976 | (cycle & 0x7fff) << 16; |
21efb3cf | 1977 | |
295e3feb KH |
1978 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
1979 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
8a2f7d93 | 1980 | context_run(&ctx->context, match); |
295e3feb KH |
1981 | } else { |
1982 | index = ctx - ohci->ir_context_list; | |
a186b4a6 | 1983 | control = IR_CONTEXT_ISOCH_HEADER; |
95984f62 | 1984 | if (ohci->use_dualbuffer) |
a186b4a6 | 1985 | control |= IR_CONTEXT_DUAL_BUFFER_MODE; |
8a2f7d93 KH |
1986 | match = (tags << 28) | (sync << 8) | ctx->base.channel; |
1987 | if (cycle >= 0) { | |
1988 | match |= (cycle & 0x07fff) << 12; | |
1989 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; | |
1990 | } | |
ed568912 | 1991 | |
295e3feb KH |
1992 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
1993 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); | |
a77754a7 | 1994 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
8a2f7d93 | 1995 | context_run(&ctx->context, control); |
295e3feb | 1996 | } |
ed568912 KH |
1997 | |
1998 | return 0; | |
1999 | } | |
2000 | ||
b8295668 KH |
2001 | static int ohci_stop_iso(struct fw_iso_context *base) |
2002 | { | |
2003 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2004 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
b8295668 KH |
2005 | int index; |
2006 | ||
2007 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
2008 | index = ctx - ohci->it_context_list; | |
2009 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
2010 | } else { | |
2011 | index = ctx - ohci->ir_context_list; | |
2012 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
2013 | } | |
2014 | flush_writes(ohci); | |
2015 | context_stop(&ctx->context); | |
2016 | ||
2017 | return 0; | |
2018 | } | |
2019 | ||
ed568912 KH |
2020 | static void ohci_free_iso_context(struct fw_iso_context *base) |
2021 | { | |
2022 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2023 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
ed568912 KH |
2024 | unsigned long flags; |
2025 | int index; | |
2026 | ||
b8295668 KH |
2027 | ohci_stop_iso(base); |
2028 | context_release(&ctx->context); | |
9b32d5f3 | 2029 | free_page((unsigned long)ctx->header); |
b8295668 | 2030 | |
ed568912 KH |
2031 | spin_lock_irqsave(&ohci->lock, flags); |
2032 | ||
2033 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
2034 | index = ctx - ohci->it_context_list; | |
ed568912 KH |
2035 | ohci->it_context_mask |= 1 << index; |
2036 | } else { | |
2037 | index = ctx - ohci->ir_context_list; | |
ed568912 | 2038 | ohci->ir_context_mask |= 1 << index; |
4817ed24 | 2039 | ohci->ir_context_channels |= 1ULL << base->channel; |
ed568912 | 2040 | } |
ed568912 KH |
2041 | |
2042 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2043 | } | |
2044 | ||
53dca511 SR |
2045 | static int ohci_queue_iso_transmit(struct fw_iso_context *base, |
2046 | struct fw_iso_packet *packet, | |
2047 | struct fw_iso_buffer *buffer, | |
2048 | unsigned long payload) | |
ed568912 | 2049 | { |
373b2edd | 2050 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 2051 | struct descriptor *d, *last, *pd; |
ed568912 KH |
2052 | struct fw_iso_packet *p; |
2053 | __le32 *header; | |
9aad8125 | 2054 | dma_addr_t d_bus, page_bus; |
ed568912 KH |
2055 | u32 z, header_z, payload_z, irq; |
2056 | u32 payload_index, payload_end_index, next_page_index; | |
30200739 | 2057 | int page, end_page, i, length, offset; |
ed568912 | 2058 | |
c781c06d KH |
2059 | /* |
2060 | * FIXME: Cycle lost behavior should be configurable: lose | |
2061 | * packet, retransmit or terminate.. | |
2062 | */ | |
ed568912 KH |
2063 | |
2064 | p = packet; | |
9aad8125 | 2065 | payload_index = payload; |
ed568912 KH |
2066 | |
2067 | if (p->skip) | |
2068 | z = 1; | |
2069 | else | |
2070 | z = 2; | |
2071 | if (p->header_length > 0) | |
2072 | z++; | |
2073 | ||
2074 | /* Determine the first page the payload isn't contained in. */ | |
2075 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
2076 | if (p->payload_length > 0) | |
2077 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
2078 | else | |
2079 | payload_z = 0; | |
2080 | ||
2081 | z += payload_z; | |
2082 | ||
2083 | /* Get header size in number of descriptors. */ | |
2d826cc5 | 2084 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
ed568912 | 2085 | |
30200739 KH |
2086 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
2087 | if (d == NULL) | |
2088 | return -ENOMEM; | |
ed568912 KH |
2089 | |
2090 | if (!p->skip) { | |
a77754a7 | 2091 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
ed568912 KH |
2092 | d[0].req_count = cpu_to_le16(8); |
2093 | ||
2094 | header = (__le32 *) &d[1]; | |
a77754a7 KH |
2095 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
2096 | IT_HEADER_TAG(p->tag) | | |
2097 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | | |
2098 | IT_HEADER_CHANNEL(ctx->base.channel) | | |
2099 | IT_HEADER_SPEED(ctx->base.speed)); | |
ed568912 | 2100 | header[1] = |
a77754a7 | 2101 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
ed568912 KH |
2102 | p->payload_length)); |
2103 | } | |
2104 | ||
2105 | if (p->header_length > 0) { | |
2106 | d[2].req_count = cpu_to_le16(p->header_length); | |
2d826cc5 | 2107 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
ed568912 KH |
2108 | memcpy(&d[z], p->header, p->header_length); |
2109 | } | |
2110 | ||
2111 | pd = d + z - payload_z; | |
2112 | payload_end_index = payload_index + p->payload_length; | |
2113 | for (i = 0; i < payload_z; i++) { | |
2114 | page = payload_index >> PAGE_SHIFT; | |
2115 | offset = payload_index & ~PAGE_MASK; | |
2116 | next_page_index = (page + 1) << PAGE_SHIFT; | |
2117 | length = | |
2118 | min(next_page_index, payload_end_index) - payload_index; | |
2119 | pd[i].req_count = cpu_to_le16(length); | |
9aad8125 KH |
2120 | |
2121 | page_bus = page_private(buffer->pages[page]); | |
2122 | pd[i].data_address = cpu_to_le32(page_bus + offset); | |
ed568912 KH |
2123 | |
2124 | payload_index += length; | |
2125 | } | |
2126 | ||
ed568912 | 2127 | if (p->interrupt) |
a77754a7 | 2128 | irq = DESCRIPTOR_IRQ_ALWAYS; |
ed568912 | 2129 | else |
a77754a7 | 2130 | irq = DESCRIPTOR_NO_IRQ; |
ed568912 | 2131 | |
30200739 | 2132 | last = z == 2 ? d : d + z - 1; |
a77754a7 KH |
2133 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
2134 | DESCRIPTOR_STATUS | | |
2135 | DESCRIPTOR_BRANCH_ALWAYS | | |
cbb59da7 | 2136 | irq); |
ed568912 | 2137 | |
30200739 | 2138 | context_append(&ctx->context, d, z, header_z); |
ed568912 KH |
2139 | |
2140 | return 0; | |
2141 | } | |
373b2edd | 2142 | |
53dca511 SR |
2143 | static int ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base, |
2144 | struct fw_iso_packet *packet, | |
2145 | struct fw_iso_buffer *buffer, | |
2146 | unsigned long payload) | |
295e3feb KH |
2147 | { |
2148 | struct iso_context *ctx = container_of(base, struct iso_context, base); | |
2149 | struct db_descriptor *db = NULL; | |
2150 | struct descriptor *d; | |
2151 | struct fw_iso_packet *p; | |
2152 | dma_addr_t d_bus, page_bus; | |
2153 | u32 z, header_z, length, rest; | |
c70dc788 | 2154 | int page, offset, packet_count, header_size; |
373b2edd | 2155 | |
c781c06d KH |
2156 | /* |
2157 | * FIXME: Cycle lost behavior should be configurable: lose | |
2158 | * packet, retransmit or terminate.. | |
2159 | */ | |
295e3feb KH |
2160 | |
2161 | p = packet; | |
2162 | z = 2; | |
2163 | ||
c781c06d | 2164 | /* |
1aa292bb DM |
2165 | * The OHCI controller puts the isochronous header and trailer in the |
2166 | * buffer, so we need at least 8 bytes. | |
c781c06d | 2167 | */ |
c70dc788 | 2168 | packet_count = p->header_length / ctx->base.header_size; |
1aa292bb | 2169 | header_size = packet_count * max(ctx->base.header_size, (size_t)8); |
c70dc788 | 2170 | |
295e3feb | 2171 | /* Get header size in number of descriptors. */ |
2d826cc5 | 2172 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); |
295e3feb KH |
2173 | page = payload >> PAGE_SHIFT; |
2174 | offset = payload & ~PAGE_MASK; | |
2175 | rest = p->payload_length; | |
2176 | ||
295e3feb KH |
2177 | /* FIXME: make packet-per-buffer/dual-buffer a context option */ |
2178 | while (rest > 0) { | |
2179 | d = context_get_descriptors(&ctx->context, | |
2180 | z + header_z, &d_bus); | |
2181 | if (d == NULL) | |
2182 | return -ENOMEM; | |
2183 | ||
2184 | db = (struct db_descriptor *) d; | |
a77754a7 KH |
2185 | db->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2186 | DESCRIPTOR_BRANCH_ALWAYS); | |
1aa292bb DM |
2187 | db->first_size = |
2188 | cpu_to_le16(max(ctx->base.header_size, (size_t)8)); | |
0642b657 DM |
2189 | if (p->skip && rest == p->payload_length) { |
2190 | db->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
2191 | db->first_req_count = db->first_size; | |
2192 | } else { | |
2193 | db->first_req_count = cpu_to_le16(header_size); | |
2194 | } | |
1e1d196b | 2195 | db->first_res_count = db->first_req_count; |
2d826cc5 | 2196 | db->first_buffer = cpu_to_le32(d_bus + sizeof(*db)); |
373b2edd | 2197 | |
0642b657 DM |
2198 | if (p->skip && rest == p->payload_length) |
2199 | length = 4; | |
2200 | else if (offset + rest < PAGE_SIZE) | |
295e3feb KH |
2201 | length = rest; |
2202 | else | |
2203 | length = PAGE_SIZE - offset; | |
2204 | ||
1e1d196b KH |
2205 | db->second_req_count = cpu_to_le16(length); |
2206 | db->second_res_count = db->second_req_count; | |
295e3feb KH |
2207 | page_bus = page_private(buffer->pages[page]); |
2208 | db->second_buffer = cpu_to_le32(page_bus + offset); | |
2209 | ||
cb2d2cdb | 2210 | if (p->interrupt && length == rest) |
a77754a7 | 2211 | db->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
cb2d2cdb | 2212 | |
295e3feb KH |
2213 | context_append(&ctx->context, d, z, header_z); |
2214 | offset = (offset + length) & ~PAGE_MASK; | |
2215 | rest -= length; | |
0642b657 DM |
2216 | if (offset == 0) |
2217 | page++; | |
295e3feb KH |
2218 | } |
2219 | ||
d2746dc1 KH |
2220 | return 0; |
2221 | } | |
21efb3cf | 2222 | |
53dca511 SR |
2223 | static int ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base, |
2224 | struct fw_iso_packet *packet, | |
2225 | struct fw_iso_buffer *buffer, | |
2226 | unsigned long payload) | |
a186b4a6 JW |
2227 | { |
2228 | struct iso_context *ctx = container_of(base, struct iso_context, base); | |
2229 | struct descriptor *d = NULL, *pd = NULL; | |
bcee893c | 2230 | struct fw_iso_packet *p = packet; |
a186b4a6 JW |
2231 | dma_addr_t d_bus, page_bus; |
2232 | u32 z, header_z, rest; | |
bcee893c DM |
2233 | int i, j, length; |
2234 | int page, offset, packet_count, header_size, payload_per_buffer; | |
a186b4a6 JW |
2235 | |
2236 | /* | |
1aa292bb DM |
2237 | * The OHCI controller puts the isochronous header and trailer in the |
2238 | * buffer, so we need at least 8 bytes. | |
a186b4a6 JW |
2239 | */ |
2240 | packet_count = p->header_length / ctx->base.header_size; | |
1aa292bb | 2241 | header_size = max(ctx->base.header_size, (size_t)8); |
a186b4a6 JW |
2242 | |
2243 | /* Get header size in number of descriptors. */ | |
2244 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); | |
2245 | page = payload >> PAGE_SHIFT; | |
2246 | offset = payload & ~PAGE_MASK; | |
bcee893c | 2247 | payload_per_buffer = p->payload_length / packet_count; |
a186b4a6 JW |
2248 | |
2249 | for (i = 0; i < packet_count; i++) { | |
2250 | /* d points to the header descriptor */ | |
bcee893c | 2251 | z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1; |
a186b4a6 | 2252 | d = context_get_descriptors(&ctx->context, |
bcee893c | 2253 | z + header_z, &d_bus); |
a186b4a6 JW |
2254 | if (d == NULL) |
2255 | return -ENOMEM; | |
2256 | ||
bcee893c DM |
2257 | d->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2258 | DESCRIPTOR_INPUT_MORE); | |
2259 | if (p->skip && i == 0) | |
2260 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
a186b4a6 JW |
2261 | d->req_count = cpu_to_le16(header_size); |
2262 | d->res_count = d->req_count; | |
bcee893c | 2263 | d->transfer_status = 0; |
a186b4a6 JW |
2264 | d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d))); |
2265 | ||
bcee893c DM |
2266 | rest = payload_per_buffer; |
2267 | for (j = 1; j < z; j++) { | |
2268 | pd = d + j; | |
2269 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | | |
2270 | DESCRIPTOR_INPUT_MORE); | |
2271 | ||
2272 | if (offset + rest < PAGE_SIZE) | |
2273 | length = rest; | |
2274 | else | |
2275 | length = PAGE_SIZE - offset; | |
2276 | pd->req_count = cpu_to_le16(length); | |
2277 | pd->res_count = pd->req_count; | |
2278 | pd->transfer_status = 0; | |
2279 | ||
2280 | page_bus = page_private(buffer->pages[page]); | |
2281 | pd->data_address = cpu_to_le32(page_bus + offset); | |
2282 | ||
2283 | offset = (offset + length) & ~PAGE_MASK; | |
2284 | rest -= length; | |
2285 | if (offset == 0) | |
2286 | page++; | |
2287 | } | |
a186b4a6 JW |
2288 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2289 | DESCRIPTOR_INPUT_LAST | | |
2290 | DESCRIPTOR_BRANCH_ALWAYS); | |
bcee893c | 2291 | if (p->interrupt && i == packet_count - 1) |
a186b4a6 JW |
2292 | pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
2293 | ||
a186b4a6 JW |
2294 | context_append(&ctx->context, d, z, header_z); |
2295 | } | |
2296 | ||
2297 | return 0; | |
2298 | } | |
2299 | ||
53dca511 SR |
2300 | static int ohci_queue_iso(struct fw_iso_context *base, |
2301 | struct fw_iso_packet *packet, | |
2302 | struct fw_iso_buffer *buffer, | |
2303 | unsigned long payload) | |
295e3feb | 2304 | { |
e364cf4e | 2305 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
fe5ca634 | 2306 | unsigned long flags; |
2dbd7d7e | 2307 | int ret; |
e364cf4e | 2308 | |
fe5ca634 | 2309 | spin_lock_irqsave(&ctx->context.ohci->lock, flags); |
295e3feb | 2310 | if (base->type == FW_ISO_CONTEXT_TRANSMIT) |
2dbd7d7e | 2311 | ret = ohci_queue_iso_transmit(base, packet, buffer, payload); |
95984f62 | 2312 | else if (ctx->context.ohci->use_dualbuffer) |
2dbd7d7e SR |
2313 | ret = ohci_queue_iso_receive_dualbuffer(base, packet, |
2314 | buffer, payload); | |
e364cf4e | 2315 | else |
2dbd7d7e SR |
2316 | ret = ohci_queue_iso_receive_packet_per_buffer(base, packet, |
2317 | buffer, payload); | |
fe5ca634 DM |
2318 | spin_unlock_irqrestore(&ctx->context.ohci->lock, flags); |
2319 | ||
2dbd7d7e | 2320 | return ret; |
295e3feb KH |
2321 | } |
2322 | ||
21ebcd12 | 2323 | static const struct fw_card_driver ohci_driver = { |
ed568912 KH |
2324 | .enable = ohci_enable, |
2325 | .update_phy_reg = ohci_update_phy_reg, | |
2326 | .set_config_rom = ohci_set_config_rom, | |
2327 | .send_request = ohci_send_request, | |
2328 | .send_response = ohci_send_response, | |
730c32f5 | 2329 | .cancel_packet = ohci_cancel_packet, |
ed568912 | 2330 | .enable_phys_dma = ohci_enable_phys_dma, |
d60d7f1d | 2331 | .get_bus_time = ohci_get_bus_time, |
ed568912 KH |
2332 | |
2333 | .allocate_iso_context = ohci_allocate_iso_context, | |
2334 | .free_iso_context = ohci_free_iso_context, | |
2335 | .queue_iso = ohci_queue_iso, | |
69cdb726 | 2336 | .start_iso = ohci_start_iso, |
b8295668 | 2337 | .stop_iso = ohci_stop_iso, |
ed568912 KH |
2338 | }; |
2339 | ||
ea8d006b | 2340 | #ifdef CONFIG_PPC_PMAC |
2ed0f181 SR |
2341 | static void ohci_pmac_on(struct pci_dev *dev) |
2342 | { | |
ea8d006b SR |
2343 | if (machine_is(powermac)) { |
2344 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2345 | ||
2346 | if (ofn) { | |
2347 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); | |
2348 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
2349 | } | |
2350 | } | |
2ed0f181 SR |
2351 | } |
2352 | ||
2353 | static void ohci_pmac_off(struct pci_dev *dev) | |
2354 | { | |
2355 | if (machine_is(powermac)) { | |
2356 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2357 | ||
2358 | if (ofn) { | |
2359 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
2360 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); | |
2361 | } | |
2362 | } | |
2363 | } | |
2364 | #else | |
2365 | #define ohci_pmac_on(dev) | |
2366 | #define ohci_pmac_off(dev) | |
ea8d006b SR |
2367 | #endif /* CONFIG_PPC_PMAC */ |
2368 | ||
53dca511 SR |
2369 | static int __devinit pci_probe(struct pci_dev *dev, |
2370 | const struct pci_device_id *ent) | |
2ed0f181 SR |
2371 | { |
2372 | struct fw_ohci *ohci; | |
95984f62 | 2373 | u32 bus_options, max_receive, link_speed, version; |
2ed0f181 SR |
2374 | u64 guid; |
2375 | int err; | |
2376 | size_t size; | |
2377 | ||
2d826cc5 | 2378 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
ed568912 | 2379 | if (ohci == NULL) { |
7007a076 SR |
2380 | err = -ENOMEM; |
2381 | goto fail; | |
ed568912 KH |
2382 | } |
2383 | ||
2384 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
2385 | ||
130d5496 SR |
2386 | ohci_pmac_on(dev); |
2387 | ||
d79406dd KH |
2388 | err = pci_enable_device(dev); |
2389 | if (err) { | |
7007a076 | 2390 | fw_error("Failed to enable OHCI hardware\n"); |
bd7dee63 | 2391 | goto fail_free; |
ed568912 KH |
2392 | } |
2393 | ||
2394 | pci_set_master(dev); | |
2395 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
2396 | pci_set_drvdata(dev, ohci); | |
2397 | ||
2398 | spin_lock_init(&ohci->lock); | |
2399 | ||
2400 | tasklet_init(&ohci->bus_reset_tasklet, | |
2401 | bus_reset_tasklet, (unsigned long)ohci); | |
2402 | ||
d79406dd KH |
2403 | err = pci_request_region(dev, 0, ohci_driver_name); |
2404 | if (err) { | |
ed568912 | 2405 | fw_error("MMIO resource unavailable\n"); |
d79406dd | 2406 | goto fail_disable; |
ed568912 KH |
2407 | } |
2408 | ||
2409 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
2410 | if (ohci->registers == NULL) { | |
2411 | fw_error("Failed to remap registers\n"); | |
d79406dd KH |
2412 | err = -ENXIO; |
2413 | goto fail_iomem; | |
ed568912 KH |
2414 | } |
2415 | ||
95984f62 SR |
2416 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
2417 | ohci->use_dualbuffer = version >= OHCI_VERSION_1_1; | |
2418 | ||
2419 | /* x86-32 currently doesn't use highmem for dma_alloc_coherent */ | |
2420 | #if !defined(CONFIG_X86_32) | |
2421 | /* dual-buffer mode is broken with descriptor addresses above 2G */ | |
2422 | if (dev->vendor == PCI_VENDOR_ID_TI && | |
2423 | dev->device == PCI_DEVICE_ID_TI_TSB43AB22) | |
2424 | ohci->use_dualbuffer = false; | |
2425 | #endif | |
2426 | ||
2427 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) | |
2428 | ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE && | |
2429 | dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW; | |
2430 | #endif | |
2431 | ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI; | |
2432 | ||
ed568912 KH |
2433 | ar_context_init(&ohci->ar_request_ctx, ohci, |
2434 | OHCI1394_AsReqRcvContextControlSet); | |
2435 | ||
2436 | ar_context_init(&ohci->ar_response_ctx, ohci, | |
2437 | OHCI1394_AsRspRcvContextControlSet); | |
2438 | ||
fe5ca634 | 2439 | context_init(&ohci->at_request_ctx, ohci, |
f319b6a0 | 2440 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); |
ed568912 | 2441 | |
fe5ca634 | 2442 | context_init(&ohci->at_response_ctx, ohci, |
f319b6a0 | 2443 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); |
ed568912 | 2444 | |
ed568912 KH |
2445 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
2446 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); | |
2447 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); | |
2448 | size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask); | |
2449 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); | |
2450 | ||
2451 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
4817ed24 | 2452 | ohci->ir_context_channels = ~0ULL; |
ed568912 KH |
2453 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); |
2454 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); | |
2455 | size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask); | |
2456 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); | |
2457 | ||
2458 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
d79406dd | 2459 | err = -ENOMEM; |
7007a076 | 2460 | goto fail_contexts; |
ed568912 KH |
2461 | } |
2462 | ||
2463 | /* self-id dma buffer allocation */ | |
2464 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, | |
2465 | SELF_ID_BUF_SIZE, | |
2466 | &ohci->self_id_bus, | |
2467 | GFP_KERNEL); | |
2468 | if (ohci->self_id_cpu == NULL) { | |
d79406dd | 2469 | err = -ENOMEM; |
7007a076 | 2470 | goto fail_contexts; |
ed568912 KH |
2471 | } |
2472 | ||
ed568912 KH |
2473 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
2474 | max_receive = (bus_options >> 12) & 0xf; | |
2475 | link_speed = bus_options & 0x7; | |
2476 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
2477 | reg_read(ohci, OHCI1394_GUIDLo); | |
2478 | ||
d79406dd | 2479 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
e1eff7a3 | 2480 | if (err) |
d79406dd | 2481 | goto fail_self_id; |
ed568912 | 2482 | |
500be725 | 2483 | fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n", |
a1f64819 | 2484 | dev_name(&dev->dev), version >> 16, version & 0xff); |
e1eff7a3 | 2485 | |
ed568912 | 2486 | return 0; |
d79406dd KH |
2487 | |
2488 | fail_self_id: | |
2489 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, | |
2490 | ohci->self_id_cpu, ohci->self_id_bus); | |
7007a076 | 2491 | fail_contexts: |
d79406dd | 2492 | kfree(ohci->ir_context_list); |
7007a076 SR |
2493 | kfree(ohci->it_context_list); |
2494 | context_release(&ohci->at_response_ctx); | |
2495 | context_release(&ohci->at_request_ctx); | |
2496 | ar_context_release(&ohci->ar_response_ctx); | |
2497 | ar_context_release(&ohci->ar_request_ctx); | |
d79406dd KH |
2498 | pci_iounmap(dev, ohci->registers); |
2499 | fail_iomem: | |
2500 | pci_release_region(dev, 0); | |
2501 | fail_disable: | |
2502 | pci_disable_device(dev); | |
bd7dee63 SR |
2503 | fail_free: |
2504 | kfree(&ohci->card); | |
130d5496 | 2505 | ohci_pmac_off(dev); |
7007a076 SR |
2506 | fail: |
2507 | if (err == -ENOMEM) | |
2508 | fw_error("Out of memory\n"); | |
d79406dd KH |
2509 | |
2510 | return err; | |
ed568912 KH |
2511 | } |
2512 | ||
2513 | static void pci_remove(struct pci_dev *dev) | |
2514 | { | |
2515 | struct fw_ohci *ohci; | |
2516 | ||
2517 | ohci = pci_get_drvdata(dev); | |
e254a4b4 KH |
2518 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
2519 | flush_writes(ohci); | |
ed568912 KH |
2520 | fw_core_remove_card(&ohci->card); |
2521 | ||
c781c06d KH |
2522 | /* |
2523 | * FIXME: Fail all pending packets here, now that the upper | |
2524 | * layers can't queue any more. | |
2525 | */ | |
ed568912 KH |
2526 | |
2527 | software_reset(ohci); | |
2528 | free_irq(dev->irq, ohci); | |
a55709ba JF |
2529 | |
2530 | if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom) | |
2531 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2532 | ohci->next_config_rom, ohci->next_config_rom_bus); | |
2533 | if (ohci->config_rom) | |
2534 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2535 | ohci->config_rom, ohci->config_rom_bus); | |
d79406dd KH |
2536 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
2537 | ohci->self_id_cpu, ohci->self_id_bus); | |
a55709ba JF |
2538 | ar_context_release(&ohci->ar_request_ctx); |
2539 | ar_context_release(&ohci->ar_response_ctx); | |
2540 | context_release(&ohci->at_request_ctx); | |
2541 | context_release(&ohci->at_response_ctx); | |
d79406dd KH |
2542 | kfree(ohci->it_context_list); |
2543 | kfree(ohci->ir_context_list); | |
2544 | pci_iounmap(dev, ohci->registers); | |
2545 | pci_release_region(dev, 0); | |
2546 | pci_disable_device(dev); | |
bd7dee63 | 2547 | kfree(&ohci->card); |
2ed0f181 | 2548 | ohci_pmac_off(dev); |
ea8d006b | 2549 | |
ed568912 KH |
2550 | fw_notify("Removed fw-ohci device.\n"); |
2551 | } | |
2552 | ||
2aef469a | 2553 | #ifdef CONFIG_PM |
2ed0f181 | 2554 | static int pci_suspend(struct pci_dev *dev, pm_message_t state) |
2aef469a | 2555 | { |
2ed0f181 | 2556 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
2557 | int err; |
2558 | ||
2559 | software_reset(ohci); | |
2ed0f181 SR |
2560 | free_irq(dev->irq, ohci); |
2561 | err = pci_save_state(dev); | |
2aef469a | 2562 | if (err) { |
8a8cea27 | 2563 | fw_error("pci_save_state failed\n"); |
2aef469a KH |
2564 | return err; |
2565 | } | |
2ed0f181 | 2566 | err = pci_set_power_state(dev, pci_choose_state(dev, state)); |
55111428 SR |
2567 | if (err) |
2568 | fw_error("pci_set_power_state failed with %d\n", err); | |
2ed0f181 | 2569 | ohci_pmac_off(dev); |
ea8d006b | 2570 | |
2aef469a KH |
2571 | return 0; |
2572 | } | |
2573 | ||
2ed0f181 | 2574 | static int pci_resume(struct pci_dev *dev) |
2aef469a | 2575 | { |
2ed0f181 | 2576 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
2577 | int err; |
2578 | ||
2ed0f181 SR |
2579 | ohci_pmac_on(dev); |
2580 | pci_set_power_state(dev, PCI_D0); | |
2581 | pci_restore_state(dev); | |
2582 | err = pci_enable_device(dev); | |
2aef469a | 2583 | if (err) { |
8a8cea27 | 2584 | fw_error("pci_enable_device failed\n"); |
2aef469a KH |
2585 | return err; |
2586 | } | |
2587 | ||
0bd243c4 | 2588 | return ohci_enable(&ohci->card, NULL, 0); |
2aef469a KH |
2589 | } |
2590 | #endif | |
2591 | ||
ed568912 KH |
2592 | static struct pci_device_id pci_table[] = { |
2593 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, | |
2594 | { } | |
2595 | }; | |
2596 | ||
2597 | MODULE_DEVICE_TABLE(pci, pci_table); | |
2598 | ||
2599 | static struct pci_driver fw_ohci_pci_driver = { | |
2600 | .name = ohci_driver_name, | |
2601 | .id_table = pci_table, | |
2602 | .probe = pci_probe, | |
2603 | .remove = pci_remove, | |
2aef469a KH |
2604 | #ifdef CONFIG_PM |
2605 | .resume = pci_resume, | |
2606 | .suspend = pci_suspend, | |
2607 | #endif | |
ed568912 KH |
2608 | }; |
2609 | ||
2610 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
2611 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
2612 | MODULE_LICENSE("GPL"); | |
2613 | ||
1e4c7b0d OH |
2614 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
2615 | #ifndef CONFIG_IEEE1394_OHCI1394_MODULE | |
2616 | MODULE_ALIAS("ohci1394"); | |
2617 | #endif | |
2618 | ||
ed568912 KH |
2619 | static int __init fw_ohci_init(void) |
2620 | { | |
2621 | return pci_register_driver(&fw_ohci_pci_driver); | |
2622 | } | |
2623 | ||
2624 | static void __exit fw_ohci_cleanup(void) | |
2625 | { | |
2626 | pci_unregister_driver(&fw_ohci_pci_driver); | |
2627 | } | |
2628 | ||
2629 | module_init(fw_ohci_init); | |
2630 | module_exit(fw_ohci_cleanup); |