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> |
e8ca9702 | 23 | #include <linux/device.h> |
cf3e72fd | 24 | #include <linux/dma-mapping.h> |
77c9a5da | 25 | #include <linux/firewire.h> |
e8ca9702 | 26 | #include <linux/firewire-constants.h> |
c26f0234 | 27 | #include <linux/gfp.h> |
a7fb60db SR |
28 | #include <linux/init.h> |
29 | #include <linux/interrupt.h> | |
e8ca9702 | 30 | #include <linux/io.h> |
a7fb60db | 31 | #include <linux/kernel.h> |
e8ca9702 | 32 | #include <linux/list.h> |
faa2fb4e | 33 | #include <linux/mm.h> |
a7fb60db | 34 | #include <linux/module.h> |
ad3c0fe8 | 35 | #include <linux/moduleparam.h> |
a7fb60db | 36 | #include <linux/pci.h> |
fc383796 | 37 | #include <linux/pci_ids.h> |
c26f0234 | 38 | #include <linux/spinlock.h> |
e8ca9702 | 39 | #include <linux/string.h> |
cf3e72fd | 40 | |
e8ca9702 | 41 | #include <asm/byteorder.h> |
c26f0234 | 42 | #include <asm/page.h> |
ee71c2f9 | 43 | #include <asm/system.h> |
ed568912 | 44 | |
ea8d006b SR |
45 | #ifdef CONFIG_PPC_PMAC |
46 | #include <asm/pmac_feature.h> | |
47 | #endif | |
48 | ||
77c9a5da SR |
49 | #include "core.h" |
50 | #include "ohci.h" | |
ed568912 | 51 | |
a77754a7 KH |
52 | #define DESCRIPTOR_OUTPUT_MORE 0 |
53 | #define DESCRIPTOR_OUTPUT_LAST (1 << 12) | |
54 | #define DESCRIPTOR_INPUT_MORE (2 << 12) | |
55 | #define DESCRIPTOR_INPUT_LAST (3 << 12) | |
56 | #define DESCRIPTOR_STATUS (1 << 11) | |
57 | #define DESCRIPTOR_KEY_IMMEDIATE (2 << 8) | |
58 | #define DESCRIPTOR_PING (1 << 7) | |
59 | #define DESCRIPTOR_YY (1 << 6) | |
60 | #define DESCRIPTOR_NO_IRQ (0 << 4) | |
61 | #define DESCRIPTOR_IRQ_ERROR (1 << 4) | |
62 | #define DESCRIPTOR_IRQ_ALWAYS (3 << 4) | |
63 | #define DESCRIPTOR_BRANCH_ALWAYS (3 << 2) | |
64 | #define DESCRIPTOR_WAIT (3 << 0) | |
ed568912 KH |
65 | |
66 | struct descriptor { | |
67 | __le16 req_count; | |
68 | __le16 control; | |
69 | __le32 data_address; | |
70 | __le32 branch_address; | |
71 | __le16 res_count; | |
72 | __le16 transfer_status; | |
73 | } __attribute__((aligned(16))); | |
74 | ||
a77754a7 KH |
75 | #define CONTROL_SET(regs) (regs) |
76 | #define CONTROL_CLEAR(regs) ((regs) + 4) | |
77 | #define COMMAND_PTR(regs) ((regs) + 12) | |
78 | #define CONTEXT_MATCH(regs) ((regs) + 16) | |
72e318e0 | 79 | |
32b46093 | 80 | struct ar_buffer { |
ed568912 | 81 | struct descriptor descriptor; |
32b46093 KH |
82 | struct ar_buffer *next; |
83 | __le32 data[0]; | |
84 | }; | |
ed568912 | 85 | |
32b46093 KH |
86 | struct ar_context { |
87 | struct fw_ohci *ohci; | |
88 | struct ar_buffer *current_buffer; | |
89 | struct ar_buffer *last_buffer; | |
90 | void *pointer; | |
72e318e0 | 91 | u32 regs; |
ed568912 KH |
92 | struct tasklet_struct tasklet; |
93 | }; | |
94 | ||
30200739 KH |
95 | struct context; |
96 | ||
97 | typedef int (*descriptor_callback_t)(struct context *ctx, | |
98 | struct descriptor *d, | |
99 | struct descriptor *last); | |
fe5ca634 DM |
100 | |
101 | /* | |
102 | * A buffer that contains a block of DMA-able coherent memory used for | |
103 | * storing a portion of a DMA descriptor program. | |
104 | */ | |
105 | struct descriptor_buffer { | |
106 | struct list_head list; | |
107 | dma_addr_t buffer_bus; | |
108 | size_t buffer_size; | |
109 | size_t used; | |
110 | struct descriptor buffer[0]; | |
111 | }; | |
112 | ||
30200739 | 113 | struct context { |
373b2edd | 114 | struct fw_ohci *ohci; |
30200739 | 115 | u32 regs; |
fe5ca634 | 116 | int total_allocation; |
373b2edd | 117 | |
fe5ca634 DM |
118 | /* |
119 | * List of page-sized buffers for storing DMA descriptors. | |
120 | * Head of list contains buffers in use and tail of list contains | |
121 | * free buffers. | |
122 | */ | |
123 | struct list_head buffer_list; | |
124 | ||
125 | /* | |
126 | * Pointer to a buffer inside buffer_list that contains the tail | |
127 | * end of the current DMA program. | |
128 | */ | |
129 | struct descriptor_buffer *buffer_tail; | |
130 | ||
131 | /* | |
132 | * The descriptor containing the branch address of the first | |
133 | * descriptor that has not yet been filled by the device. | |
134 | */ | |
135 | struct descriptor *last; | |
136 | ||
137 | /* | |
138 | * The last descriptor in the DMA program. It contains the branch | |
139 | * address that must be updated upon appending a new descriptor. | |
140 | */ | |
141 | struct descriptor *prev; | |
30200739 KH |
142 | |
143 | descriptor_callback_t callback; | |
144 | ||
373b2edd | 145 | struct tasklet_struct tasklet; |
30200739 | 146 | }; |
30200739 | 147 | |
a77754a7 KH |
148 | #define IT_HEADER_SY(v) ((v) << 0) |
149 | #define IT_HEADER_TCODE(v) ((v) << 4) | |
150 | #define IT_HEADER_CHANNEL(v) ((v) << 8) | |
151 | #define IT_HEADER_TAG(v) ((v) << 14) | |
152 | #define IT_HEADER_SPEED(v) ((v) << 16) | |
153 | #define IT_HEADER_DATA_LENGTH(v) ((v) << 16) | |
ed568912 KH |
154 | |
155 | struct iso_context { | |
156 | struct fw_iso_context base; | |
30200739 | 157 | struct context context; |
0642b657 | 158 | int excess_bytes; |
9b32d5f3 KH |
159 | void *header; |
160 | size_t header_length; | |
ed568912 KH |
161 | }; |
162 | ||
163 | #define CONFIG_ROM_SIZE 1024 | |
164 | ||
165 | struct fw_ohci { | |
166 | struct fw_card card; | |
167 | ||
168 | __iomem char *registers; | |
e636fe25 | 169 | int node_id; |
ed568912 | 170 | int generation; |
e09770db | 171 | int request_generation; /* for timestamping incoming requests */ |
4a635593 | 172 | unsigned quirks; |
ed568912 | 173 | |
c781c06d KH |
174 | /* |
175 | * Spinlock for accessing fw_ohci data. Never call out of | |
176 | * this driver with this lock held. | |
177 | */ | |
ed568912 | 178 | spinlock_t lock; |
ed568912 KH |
179 | |
180 | struct ar_context ar_request_ctx; | |
181 | struct ar_context ar_response_ctx; | |
f319b6a0 KH |
182 | struct context at_request_ctx; |
183 | struct context at_response_ctx; | |
ed568912 KH |
184 | |
185 | u32 it_context_mask; | |
186 | struct iso_context *it_context_list; | |
4817ed24 | 187 | u64 ir_context_channels; |
ed568912 KH |
188 | u32 ir_context_mask; |
189 | struct iso_context *ir_context_list; | |
ecb1cf9c SR |
190 | |
191 | __be32 *config_rom; | |
192 | dma_addr_t config_rom_bus; | |
193 | __be32 *next_config_rom; | |
194 | dma_addr_t next_config_rom_bus; | |
195 | __be32 next_header; | |
196 | ||
197 | __le32 *self_id_cpu; | |
198 | dma_addr_t self_id_bus; | |
199 | struct tasklet_struct bus_reset_tasklet; | |
200 | ||
201 | u32 self_id_buffer[512]; | |
ed568912 KH |
202 | }; |
203 | ||
95688e97 | 204 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
ed568912 KH |
205 | { |
206 | return container_of(card, struct fw_ohci, card); | |
207 | } | |
208 | ||
295e3feb KH |
209 | #define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 |
210 | #define IR_CONTEXT_BUFFER_FILL 0x80000000 | |
211 | #define IR_CONTEXT_ISOCH_HEADER 0x40000000 | |
212 | #define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000 | |
213 | #define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000 | |
214 | #define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000 | |
ed568912 KH |
215 | |
216 | #define CONTEXT_RUN 0x8000 | |
217 | #define CONTEXT_WAKE 0x1000 | |
218 | #define CONTEXT_DEAD 0x0800 | |
219 | #define CONTEXT_ACTIVE 0x0400 | |
220 | ||
8b7b6afa | 221 | #define OHCI1394_MAX_AT_REQ_RETRIES 0xf |
ed568912 KH |
222 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 |
223 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 | |
224 | ||
ed568912 KH |
225 | #define OHCI1394_REGISTER_SIZE 0x800 |
226 | #define OHCI_LOOP_COUNT 500 | |
227 | #define OHCI1394_PCI_HCI_Control 0x40 | |
228 | #define SELF_ID_BUF_SIZE 0x800 | |
32b46093 | 229 | #define OHCI_TCODE_PHY_PACKET 0x0e |
e364cf4e | 230 | #define OHCI_VERSION_1_1 0x010010 |
0edeefd9 | 231 | |
ed568912 KH |
232 | static char ohci_driver_name[] = KBUILD_MODNAME; |
233 | ||
8301b91b CL |
234 | #define PCI_DEVICE_ID_TI_TSB12LV22 0x8009 |
235 | ||
4a635593 SR |
236 | #define QUIRK_CYCLE_TIMER 1 |
237 | #define QUIRK_RESET_PACKET 2 | |
238 | #define QUIRK_BE_HEADERS 4 | |
239 | ||
240 | /* In case of multiple matches in ohci_quirks[], only the first one is used. */ | |
241 | static const struct { | |
242 | unsigned short vendor, device, flags; | |
243 | } ohci_quirks[] = { | |
8301b91b CL |
244 | {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV22, QUIRK_CYCLE_TIMER | |
245 | QUIRK_RESET_PACKET}, | |
4a635593 SR |
246 | {PCI_VENDOR_ID_TI, PCI_ANY_ID, QUIRK_RESET_PACKET}, |
247 | {PCI_VENDOR_ID_AL, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, | |
248 | {PCI_VENDOR_ID_NEC, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, | |
249 | {PCI_VENDOR_ID_VIA, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, | |
250 | {PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS}, | |
251 | }; | |
252 | ||
3e9cc2f3 SR |
253 | /* This overrides anything that was found in ohci_quirks[]. */ |
254 | static int param_quirks; | |
255 | module_param_named(quirks, param_quirks, int, 0644); | |
256 | MODULE_PARM_DESC(quirks, "Chip quirks (default = 0" | |
257 | ", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER) | |
258 | ", reset packet generation = " __stringify(QUIRK_RESET_PACKET) | |
259 | ", AR/selfID endianess = " __stringify(QUIRK_BE_HEADERS) | |
260 | ")"); | |
261 | ||
ad3c0fe8 SR |
262 | #ifdef CONFIG_FIREWIRE_OHCI_DEBUG |
263 | ||
a007bb85 | 264 | #define OHCI_PARAM_DEBUG_AT_AR 1 |
ad3c0fe8 | 265 | #define OHCI_PARAM_DEBUG_SELFIDS 2 |
a007bb85 SR |
266 | #define OHCI_PARAM_DEBUG_IRQS 4 |
267 | #define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */ | |
ad3c0fe8 SR |
268 | |
269 | static int param_debug; | |
270 | module_param_named(debug, param_debug, int, 0644); | |
271 | MODULE_PARM_DESC(debug, "Verbose logging (default = 0" | |
ad3c0fe8 | 272 | ", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR) |
a007bb85 SR |
273 | ", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS) |
274 | ", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS) | |
275 | ", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS) | |
ad3c0fe8 SR |
276 | ", or a combination, or all = -1)"); |
277 | ||
278 | static void log_irqs(u32 evt) | |
279 | { | |
a007bb85 SR |
280 | if (likely(!(param_debug & |
281 | (OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS)))) | |
282 | return; | |
283 | ||
284 | if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) && | |
285 | !(evt & OHCI1394_busReset)) | |
ad3c0fe8 SR |
286 | return; |
287 | ||
168cf9af | 288 | fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt, |
161b96e7 SR |
289 | evt & OHCI1394_selfIDComplete ? " selfID" : "", |
290 | evt & OHCI1394_RQPkt ? " AR_req" : "", | |
291 | evt & OHCI1394_RSPkt ? " AR_resp" : "", | |
292 | evt & OHCI1394_reqTxComplete ? " AT_req" : "", | |
293 | evt & OHCI1394_respTxComplete ? " AT_resp" : "", | |
294 | evt & OHCI1394_isochRx ? " IR" : "", | |
295 | evt & OHCI1394_isochTx ? " IT" : "", | |
296 | evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "", | |
297 | evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "", | |
5ed1f321 | 298 | evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "", |
161b96e7 SR |
299 | evt & OHCI1394_regAccessFail ? " regAccessFail" : "", |
300 | evt & OHCI1394_busReset ? " busReset" : "", | |
301 | evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt | | |
302 | OHCI1394_RSPkt | OHCI1394_reqTxComplete | | |
303 | OHCI1394_respTxComplete | OHCI1394_isochRx | | |
304 | OHCI1394_isochTx | OHCI1394_postedWriteErr | | |
168cf9af | 305 | OHCI1394_cycleTooLong | OHCI1394_cycleInconsistent | |
161b96e7 | 306 | OHCI1394_regAccessFail | OHCI1394_busReset) |
ad3c0fe8 SR |
307 | ? " ?" : ""); |
308 | } | |
309 | ||
310 | static const char *speed[] = { | |
311 | [0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta", | |
312 | }; | |
313 | static const char *power[] = { | |
314 | [0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W", | |
315 | [4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W", | |
316 | }; | |
317 | static const char port[] = { '.', '-', 'p', 'c', }; | |
318 | ||
319 | static char _p(u32 *s, int shift) | |
320 | { | |
321 | return port[*s >> shift & 3]; | |
322 | } | |
323 | ||
08ddb2f4 | 324 | static void log_selfids(int node_id, int generation, int self_id_count, u32 *s) |
ad3c0fe8 SR |
325 | { |
326 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS))) | |
327 | return; | |
328 | ||
161b96e7 SR |
329 | fw_notify("%d selfIDs, generation %d, local node ID %04x\n", |
330 | self_id_count, generation, node_id); | |
ad3c0fe8 SR |
331 | |
332 | for (; self_id_count--; ++s) | |
333 | if ((*s & 1 << 23) == 0) | |
161b96e7 SR |
334 | fw_notify("selfID 0: %08x, phy %d [%c%c%c] " |
335 | "%s gc=%d %s %s%s%s\n", | |
336 | *s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2), | |
337 | speed[*s >> 14 & 3], *s >> 16 & 63, | |
338 | power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "", | |
339 | *s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : ""); | |
ad3c0fe8 | 340 | else |
161b96e7 SR |
341 | fw_notify("selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n", |
342 | *s, *s >> 24 & 63, | |
343 | _p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10), | |
344 | _p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2)); | |
ad3c0fe8 SR |
345 | } |
346 | ||
347 | static const char *evts[] = { | |
348 | [0x00] = "evt_no_status", [0x01] = "-reserved-", | |
349 | [0x02] = "evt_long_packet", [0x03] = "evt_missing_ack", | |
350 | [0x04] = "evt_underrun", [0x05] = "evt_overrun", | |
351 | [0x06] = "evt_descriptor_read", [0x07] = "evt_data_read", | |
352 | [0x08] = "evt_data_write", [0x09] = "evt_bus_reset", | |
353 | [0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err", | |
354 | [0x0c] = "-reserved-", [0x0d] = "-reserved-", | |
355 | [0x0e] = "evt_unknown", [0x0f] = "evt_flushed", | |
356 | [0x10] = "-reserved-", [0x11] = "ack_complete", | |
357 | [0x12] = "ack_pending ", [0x13] = "-reserved-", | |
358 | [0x14] = "ack_busy_X", [0x15] = "ack_busy_A", | |
359 | [0x16] = "ack_busy_B", [0x17] = "-reserved-", | |
360 | [0x18] = "-reserved-", [0x19] = "-reserved-", | |
361 | [0x1a] = "-reserved-", [0x1b] = "ack_tardy", | |
362 | [0x1c] = "-reserved-", [0x1d] = "ack_data_error", | |
363 | [0x1e] = "ack_type_error", [0x1f] = "-reserved-", | |
364 | [0x20] = "pending/cancelled", | |
365 | }; | |
366 | static const char *tcodes[] = { | |
367 | [0x0] = "QW req", [0x1] = "BW req", | |
368 | [0x2] = "W resp", [0x3] = "-reserved-", | |
369 | [0x4] = "QR req", [0x5] = "BR req", | |
370 | [0x6] = "QR resp", [0x7] = "BR resp", | |
371 | [0x8] = "cycle start", [0x9] = "Lk req", | |
372 | [0xa] = "async stream packet", [0xb] = "Lk resp", | |
373 | [0xc] = "-reserved-", [0xd] = "-reserved-", | |
374 | [0xe] = "link internal", [0xf] = "-reserved-", | |
375 | }; | |
376 | static const char *phys[] = { | |
377 | [0x0] = "phy config packet", [0x1] = "link-on packet", | |
378 | [0x2] = "self-id packet", [0x3] = "-reserved-", | |
379 | }; | |
380 | ||
381 | static void log_ar_at_event(char dir, int speed, u32 *header, int evt) | |
382 | { | |
383 | int tcode = header[0] >> 4 & 0xf; | |
384 | char specific[12]; | |
385 | ||
386 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR))) | |
387 | return; | |
388 | ||
389 | if (unlikely(evt >= ARRAY_SIZE(evts))) | |
390 | evt = 0x1f; | |
391 | ||
08ddb2f4 | 392 | if (evt == OHCI1394_evt_bus_reset) { |
161b96e7 SR |
393 | fw_notify("A%c evt_bus_reset, generation %d\n", |
394 | dir, (header[2] >> 16) & 0xff); | |
08ddb2f4 SR |
395 | return; |
396 | } | |
397 | ||
ad3c0fe8 | 398 | if (header[0] == ~header[1]) { |
161b96e7 SR |
399 | fw_notify("A%c %s, %s, %08x\n", |
400 | dir, evts[evt], phys[header[0] >> 30 & 0x3], header[0]); | |
ad3c0fe8 SR |
401 | return; |
402 | } | |
403 | ||
404 | switch (tcode) { | |
405 | case 0x0: case 0x6: case 0x8: | |
406 | snprintf(specific, sizeof(specific), " = %08x", | |
407 | be32_to_cpu((__force __be32)header[3])); | |
408 | break; | |
409 | case 0x1: case 0x5: case 0x7: case 0x9: case 0xb: | |
410 | snprintf(specific, sizeof(specific), " %x,%x", | |
411 | header[3] >> 16, header[3] & 0xffff); | |
412 | break; | |
413 | default: | |
414 | specific[0] = '\0'; | |
415 | } | |
416 | ||
417 | switch (tcode) { | |
418 | case 0xe: case 0xa: | |
161b96e7 | 419 | fw_notify("A%c %s, %s\n", dir, evts[evt], tcodes[tcode]); |
ad3c0fe8 SR |
420 | break; |
421 | case 0x0: case 0x1: case 0x4: case 0x5: case 0x9: | |
161b96e7 SR |
422 | fw_notify("A%c spd %x tl %02x, " |
423 | "%04x -> %04x, %s, " | |
424 | "%s, %04x%08x%s\n", | |
425 | dir, speed, header[0] >> 10 & 0x3f, | |
426 | header[1] >> 16, header[0] >> 16, evts[evt], | |
427 | tcodes[tcode], header[1] & 0xffff, header[2], specific); | |
ad3c0fe8 SR |
428 | break; |
429 | default: | |
161b96e7 SR |
430 | fw_notify("A%c spd %x tl %02x, " |
431 | "%04x -> %04x, %s, " | |
432 | "%s%s\n", | |
433 | dir, speed, header[0] >> 10 & 0x3f, | |
434 | header[1] >> 16, header[0] >> 16, evts[evt], | |
435 | tcodes[tcode], specific); | |
ad3c0fe8 SR |
436 | } |
437 | } | |
438 | ||
439 | #else | |
440 | ||
441 | #define log_irqs(evt) | |
08ddb2f4 | 442 | #define log_selfids(node_id, generation, self_id_count, sid) |
ad3c0fe8 SR |
443 | #define log_ar_at_event(dir, speed, header, evt) |
444 | ||
445 | #endif /* CONFIG_FIREWIRE_OHCI_DEBUG */ | |
446 | ||
95688e97 | 447 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
ed568912 KH |
448 | { |
449 | writel(data, ohci->registers + offset); | |
450 | } | |
451 | ||
95688e97 | 452 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
ed568912 KH |
453 | { |
454 | return readl(ohci->registers + offset); | |
455 | } | |
456 | ||
95688e97 | 457 | static inline void flush_writes(const struct fw_ohci *ohci) |
ed568912 KH |
458 | { |
459 | /* Do a dummy read to flush writes. */ | |
460 | reg_read(ohci, OHCI1394_Version); | |
461 | } | |
462 | ||
4a96b4fc | 463 | static int read_phy_reg(struct fw_card *card, int addr, u32 *value) |
ed568912 KH |
464 | { |
465 | struct fw_ohci *ohci = fw_ohci(card); | |
4a96b4fc | 466 | u32 val; |
ed568912 KH |
467 | |
468 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); | |
362e901c | 469 | flush_writes(ohci); |
ed568912 KH |
470 | msleep(2); |
471 | val = reg_read(ohci, OHCI1394_PhyControl); | |
472 | if ((val & OHCI1394_PhyControl_ReadDone) == 0) { | |
4a96b4fc | 473 | fw_error("failed to read phy reg bits\n"); |
ed568912 KH |
474 | return -EBUSY; |
475 | } | |
476 | ||
4a96b4fc CL |
477 | *value = OHCI1394_PhyControl_ReadData(val); |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | static int ohci_update_phy_reg(struct fw_card *card, int addr, | |
483 | int clear_bits, int set_bits) | |
484 | { | |
485 | struct fw_ohci *ohci = fw_ohci(card); | |
486 | u32 old; | |
487 | int err; | |
488 | ||
489 | err = read_phy_reg(card, addr, &old); | |
490 | if (err < 0) | |
491 | return err; | |
492 | ||
e7014dad CL |
493 | /* |
494 | * The interrupt status bits are cleared by writing a one bit. | |
495 | * Avoid clearing them unless explicitly requested in set_bits. | |
496 | */ | |
497 | if (addr == 5) | |
498 | clear_bits |= PHY_INT_STATUS_BITS; | |
499 | ||
ed568912 KH |
500 | old = (old & ~clear_bits) | set_bits; |
501 | reg_write(ohci, OHCI1394_PhyControl, | |
502 | OHCI1394_PhyControl_Write(addr, old)); | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
32b46093 | 507 | static int ar_context_add_page(struct ar_context *ctx) |
ed568912 | 508 | { |
32b46093 KH |
509 | struct device *dev = ctx->ohci->card.device; |
510 | struct ar_buffer *ab; | |
f5101d58 | 511 | dma_addr_t uninitialized_var(ab_bus); |
32b46093 KH |
512 | size_t offset; |
513 | ||
bde1709a | 514 | ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC); |
32b46093 KH |
515 | if (ab == NULL) |
516 | return -ENOMEM; | |
517 | ||
a55709ba | 518 | ab->next = NULL; |
2d826cc5 | 519 | memset(&ab->descriptor, 0, sizeof(ab->descriptor)); |
a77754a7 KH |
520 | ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | |
521 | DESCRIPTOR_STATUS | | |
522 | DESCRIPTOR_BRANCH_ALWAYS); | |
32b46093 KH |
523 | offset = offsetof(struct ar_buffer, data); |
524 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); | |
525 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); | |
526 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); | |
527 | ab->descriptor.branch_address = 0; | |
528 | ||
ec839e43 | 529 | ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1); |
32b46093 KH |
530 | ctx->last_buffer->next = ab; |
531 | ctx->last_buffer = ab; | |
532 | ||
a77754a7 | 533 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
ed568912 | 534 | flush_writes(ctx->ohci); |
32b46093 KH |
535 | |
536 | return 0; | |
ed568912 KH |
537 | } |
538 | ||
a55709ba JF |
539 | static void ar_context_release(struct ar_context *ctx) |
540 | { | |
541 | struct ar_buffer *ab, *ab_next; | |
542 | size_t offset; | |
543 | dma_addr_t ab_bus; | |
544 | ||
545 | for (ab = ctx->current_buffer; ab; ab = ab_next) { | |
546 | ab_next = ab->next; | |
547 | offset = offsetof(struct ar_buffer, data); | |
548 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; | |
549 | dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
550 | ab, ab_bus); | |
551 | } | |
552 | } | |
553 | ||
11bf20ad SR |
554 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
555 | #define cond_le32_to_cpu(v) \ | |
4a635593 | 556 | (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v)) |
11bf20ad SR |
557 | #else |
558 | #define cond_le32_to_cpu(v) le32_to_cpu(v) | |
559 | #endif | |
560 | ||
32b46093 | 561 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 562 | { |
ed568912 | 563 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
564 | struct fw_packet p; |
565 | u32 status, length, tcode; | |
43286568 | 566 | int evt; |
2639a6fb | 567 | |
11bf20ad SR |
568 | p.header[0] = cond_le32_to_cpu(buffer[0]); |
569 | p.header[1] = cond_le32_to_cpu(buffer[1]); | |
570 | p.header[2] = cond_le32_to_cpu(buffer[2]); | |
2639a6fb KH |
571 | |
572 | tcode = (p.header[0] >> 4) & 0x0f; | |
573 | switch (tcode) { | |
574 | case TCODE_WRITE_QUADLET_REQUEST: | |
575 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 576 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 577 | p.header_length = 16; |
32b46093 | 578 | p.payload_length = 0; |
2639a6fb KH |
579 | break; |
580 | ||
2639a6fb | 581 | case TCODE_READ_BLOCK_REQUEST : |
11bf20ad | 582 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
32b46093 KH |
583 | p.header_length = 16; |
584 | p.payload_length = 0; | |
585 | break; | |
586 | ||
587 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
588 | case TCODE_READ_BLOCK_RESPONSE: |
589 | case TCODE_LOCK_REQUEST: | |
590 | case TCODE_LOCK_RESPONSE: | |
11bf20ad | 591 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
2639a6fb | 592 | p.header_length = 16; |
32b46093 | 593 | p.payload_length = p.header[3] >> 16; |
2639a6fb KH |
594 | break; |
595 | ||
596 | case TCODE_WRITE_RESPONSE: | |
597 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 598 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 599 | p.header_length = 12; |
32b46093 | 600 | p.payload_length = 0; |
2639a6fb | 601 | break; |
ccff9629 SR |
602 | |
603 | default: | |
604 | /* FIXME: Stop context, discard everything, and restart? */ | |
605 | p.header_length = 0; | |
606 | p.payload_length = 0; | |
2639a6fb | 607 | } |
ed568912 | 608 | |
32b46093 KH |
609 | p.payload = (void *) buffer + p.header_length; |
610 | ||
611 | /* FIXME: What to do about evt_* errors? */ | |
612 | length = (p.header_length + p.payload_length + 3) / 4; | |
11bf20ad | 613 | status = cond_le32_to_cpu(buffer[length]); |
43286568 | 614 | evt = (status >> 16) & 0x1f; |
32b46093 | 615 | |
43286568 | 616 | p.ack = evt - 16; |
32b46093 KH |
617 | p.speed = (status >> 21) & 0x7; |
618 | p.timestamp = status & 0xffff; | |
619 | p.generation = ohci->request_generation; | |
ed568912 | 620 | |
43286568 | 621 | log_ar_at_event('R', p.speed, p.header, evt); |
ad3c0fe8 | 622 | |
c781c06d KH |
623 | /* |
624 | * The OHCI bus reset handler synthesizes a phy packet with | |
ed568912 KH |
625 | * the new generation number when a bus reset happens (see |
626 | * section 8.4.2.3). This helps us determine when a request | |
627 | * was received and make sure we send the response in the same | |
628 | * generation. We only need this for requests; for responses | |
629 | * we use the unique tlabel for finding the matching | |
c781c06d | 630 | * request. |
d34316a4 SR |
631 | * |
632 | * Alas some chips sometimes emit bus reset packets with a | |
633 | * wrong generation. We set the correct generation for these | |
634 | * at a slightly incorrect time (in bus_reset_tasklet). | |
c781c06d | 635 | */ |
d34316a4 | 636 | if (evt == OHCI1394_evt_bus_reset) { |
4a635593 | 637 | if (!(ohci->quirks & QUIRK_RESET_PACKET)) |
d34316a4 SR |
638 | ohci->request_generation = (p.header[2] >> 16) & 0xff; |
639 | } else if (ctx == &ohci->ar_request_ctx) { | |
2639a6fb | 640 | fw_core_handle_request(&ohci->card, &p); |
d34316a4 | 641 | } else { |
2639a6fb | 642 | fw_core_handle_response(&ohci->card, &p); |
d34316a4 | 643 | } |
ed568912 | 644 | |
32b46093 KH |
645 | return buffer + length + 1; |
646 | } | |
ed568912 | 647 | |
32b46093 KH |
648 | static void ar_context_tasklet(unsigned long data) |
649 | { | |
650 | struct ar_context *ctx = (struct ar_context *)data; | |
651 | struct fw_ohci *ohci = ctx->ohci; | |
652 | struct ar_buffer *ab; | |
653 | struct descriptor *d; | |
654 | void *buffer, *end; | |
655 | ||
656 | ab = ctx->current_buffer; | |
657 | d = &ab->descriptor; | |
658 | ||
659 | if (d->res_count == 0) { | |
660 | size_t size, rest, offset; | |
6b84236d JW |
661 | dma_addr_t start_bus; |
662 | void *start; | |
32b46093 | 663 | |
c781c06d KH |
664 | /* |
665 | * This descriptor is finished and we may have a | |
32b46093 | 666 | * packet split across this and the next buffer. We |
c781c06d KH |
667 | * reuse the page for reassembling the split packet. |
668 | */ | |
32b46093 KH |
669 | |
670 | offset = offsetof(struct ar_buffer, data); | |
6b84236d JW |
671 | start = buffer = ab; |
672 | start_bus = le32_to_cpu(ab->descriptor.data_address) - offset; | |
32b46093 | 673 | |
32b46093 KH |
674 | ab = ab->next; |
675 | d = &ab->descriptor; | |
676 | size = buffer + PAGE_SIZE - ctx->pointer; | |
677 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); | |
678 | memmove(buffer, ctx->pointer, size); | |
679 | memcpy(buffer + size, ab->data, rest); | |
680 | ctx->current_buffer = ab; | |
681 | ctx->pointer = (void *) ab->data + rest; | |
682 | end = buffer + size + rest; | |
683 | ||
684 | while (buffer < end) | |
685 | buffer = handle_ar_packet(ctx, buffer); | |
686 | ||
bde1709a | 687 | dma_free_coherent(ohci->card.device, PAGE_SIZE, |
6b84236d | 688 | start, start_bus); |
32b46093 KH |
689 | ar_context_add_page(ctx); |
690 | } else { | |
691 | buffer = ctx->pointer; | |
692 | ctx->pointer = end = | |
693 | (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); | |
694 | ||
695 | while (buffer < end) | |
696 | buffer = handle_ar_packet(ctx, buffer); | |
697 | } | |
ed568912 KH |
698 | } |
699 | ||
53dca511 SR |
700 | static int ar_context_init(struct ar_context *ctx, |
701 | struct fw_ohci *ohci, u32 regs) | |
ed568912 | 702 | { |
32b46093 | 703 | struct ar_buffer ab; |
ed568912 | 704 | |
72e318e0 KH |
705 | ctx->regs = regs; |
706 | ctx->ohci = ohci; | |
707 | ctx->last_buffer = &ab; | |
ed568912 KH |
708 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
709 | ||
32b46093 KH |
710 | ar_context_add_page(ctx); |
711 | ar_context_add_page(ctx); | |
712 | ctx->current_buffer = ab.next; | |
713 | ctx->pointer = ctx->current_buffer->data; | |
714 | ||
2aef469a KH |
715 | return 0; |
716 | } | |
717 | ||
718 | static void ar_context_run(struct ar_context *ctx) | |
719 | { | |
720 | struct ar_buffer *ab = ctx->current_buffer; | |
721 | dma_addr_t ab_bus; | |
722 | size_t offset; | |
723 | ||
724 | offset = offsetof(struct ar_buffer, data); | |
0a9972ba | 725 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
2aef469a KH |
726 | |
727 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1); | |
a77754a7 | 728 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
32b46093 | 729 | flush_writes(ctx->ohci); |
ed568912 | 730 | } |
373b2edd | 731 | |
53dca511 | 732 | static struct descriptor *find_branch_descriptor(struct descriptor *d, int z) |
a186b4a6 JW |
733 | { |
734 | int b, key; | |
735 | ||
736 | b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2; | |
737 | key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8; | |
738 | ||
739 | /* figure out which descriptor the branch address goes in */ | |
740 | if (z == 2 && (b == 3 || key == 2)) | |
741 | return d; | |
742 | else | |
743 | return d + z - 1; | |
744 | } | |
745 | ||
30200739 KH |
746 | static void context_tasklet(unsigned long data) |
747 | { | |
748 | struct context *ctx = (struct context *) data; | |
30200739 KH |
749 | struct descriptor *d, *last; |
750 | u32 address; | |
751 | int z; | |
fe5ca634 | 752 | struct descriptor_buffer *desc; |
30200739 | 753 | |
fe5ca634 DM |
754 | desc = list_entry(ctx->buffer_list.next, |
755 | struct descriptor_buffer, list); | |
756 | last = ctx->last; | |
30200739 | 757 | while (last->branch_address != 0) { |
fe5ca634 | 758 | struct descriptor_buffer *old_desc = desc; |
30200739 KH |
759 | address = le32_to_cpu(last->branch_address); |
760 | z = address & 0xf; | |
fe5ca634 DM |
761 | address &= ~0xf; |
762 | ||
763 | /* If the branch address points to a buffer outside of the | |
764 | * current buffer, advance to the next buffer. */ | |
765 | if (address < desc->buffer_bus || | |
766 | address >= desc->buffer_bus + desc->used) | |
767 | desc = list_entry(desc->list.next, | |
768 | struct descriptor_buffer, list); | |
769 | d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d); | |
a186b4a6 | 770 | last = find_branch_descriptor(d, z); |
30200739 KH |
771 | |
772 | if (!ctx->callback(ctx, d, last)) | |
773 | break; | |
774 | ||
fe5ca634 DM |
775 | if (old_desc != desc) { |
776 | /* If we've advanced to the next buffer, move the | |
777 | * previous buffer to the free list. */ | |
778 | unsigned long flags; | |
779 | old_desc->used = 0; | |
780 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
781 | list_move_tail(&old_desc->list, &ctx->buffer_list); | |
782 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); | |
783 | } | |
784 | ctx->last = last; | |
30200739 KH |
785 | } |
786 | } | |
787 | ||
fe5ca634 DM |
788 | /* |
789 | * Allocate a new buffer and add it to the list of free buffers for this | |
790 | * context. Must be called with ohci->lock held. | |
791 | */ | |
53dca511 | 792 | static int context_add_buffer(struct context *ctx) |
fe5ca634 DM |
793 | { |
794 | struct descriptor_buffer *desc; | |
f5101d58 | 795 | dma_addr_t uninitialized_var(bus_addr); |
fe5ca634 DM |
796 | int offset; |
797 | ||
798 | /* | |
799 | * 16MB of descriptors should be far more than enough for any DMA | |
800 | * program. This will catch run-away userspace or DoS attacks. | |
801 | */ | |
802 | if (ctx->total_allocation >= 16*1024*1024) | |
803 | return -ENOMEM; | |
804 | ||
805 | desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
806 | &bus_addr, GFP_ATOMIC); | |
807 | if (!desc) | |
808 | return -ENOMEM; | |
809 | ||
810 | offset = (void *)&desc->buffer - (void *)desc; | |
811 | desc->buffer_size = PAGE_SIZE - offset; | |
812 | desc->buffer_bus = bus_addr + offset; | |
813 | desc->used = 0; | |
814 | ||
815 | list_add_tail(&desc->list, &ctx->buffer_list); | |
816 | ctx->total_allocation += PAGE_SIZE; | |
817 | ||
818 | return 0; | |
819 | } | |
820 | ||
53dca511 SR |
821 | static int context_init(struct context *ctx, struct fw_ohci *ohci, |
822 | u32 regs, descriptor_callback_t callback) | |
30200739 KH |
823 | { |
824 | ctx->ohci = ohci; | |
825 | ctx->regs = regs; | |
fe5ca634 DM |
826 | ctx->total_allocation = 0; |
827 | ||
828 | INIT_LIST_HEAD(&ctx->buffer_list); | |
829 | if (context_add_buffer(ctx) < 0) | |
30200739 KH |
830 | return -ENOMEM; |
831 | ||
fe5ca634 DM |
832 | ctx->buffer_tail = list_entry(ctx->buffer_list.next, |
833 | struct descriptor_buffer, list); | |
834 | ||
30200739 KH |
835 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); |
836 | ctx->callback = callback; | |
837 | ||
c781c06d KH |
838 | /* |
839 | * We put a dummy descriptor in the buffer that has a NULL | |
30200739 | 840 | * branch address and looks like it's been sent. That way we |
fe5ca634 | 841 | * have a descriptor to append DMA programs to. |
c781c06d | 842 | */ |
fe5ca634 DM |
843 | memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer)); |
844 | ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); | |
845 | ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011); | |
846 | ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer); | |
847 | ctx->last = ctx->buffer_tail->buffer; | |
848 | ctx->prev = ctx->buffer_tail->buffer; | |
30200739 KH |
849 | |
850 | return 0; | |
851 | } | |
852 | ||
53dca511 | 853 | static void context_release(struct context *ctx) |
30200739 KH |
854 | { |
855 | struct fw_card *card = &ctx->ohci->card; | |
fe5ca634 | 856 | struct descriptor_buffer *desc, *tmp; |
30200739 | 857 | |
fe5ca634 DM |
858 | list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list) |
859 | dma_free_coherent(card->device, PAGE_SIZE, desc, | |
860 | desc->buffer_bus - | |
861 | ((void *)&desc->buffer - (void *)desc)); | |
30200739 KH |
862 | } |
863 | ||
fe5ca634 | 864 | /* Must be called with ohci->lock held */ |
53dca511 SR |
865 | static struct descriptor *context_get_descriptors(struct context *ctx, |
866 | int z, dma_addr_t *d_bus) | |
30200739 | 867 | { |
fe5ca634 DM |
868 | struct descriptor *d = NULL; |
869 | struct descriptor_buffer *desc = ctx->buffer_tail; | |
870 | ||
871 | if (z * sizeof(*d) > desc->buffer_size) | |
872 | return NULL; | |
873 | ||
874 | if (z * sizeof(*d) > desc->buffer_size - desc->used) { | |
875 | /* No room for the descriptor in this buffer, so advance to the | |
876 | * next one. */ | |
30200739 | 877 | |
fe5ca634 DM |
878 | if (desc->list.next == &ctx->buffer_list) { |
879 | /* If there is no free buffer next in the list, | |
880 | * allocate one. */ | |
881 | if (context_add_buffer(ctx) < 0) | |
882 | return NULL; | |
883 | } | |
884 | desc = list_entry(desc->list.next, | |
885 | struct descriptor_buffer, list); | |
886 | ctx->buffer_tail = desc; | |
887 | } | |
30200739 | 888 | |
fe5ca634 | 889 | d = desc->buffer + desc->used / sizeof(*d); |
2d826cc5 | 890 | memset(d, 0, z * sizeof(*d)); |
fe5ca634 | 891 | *d_bus = desc->buffer_bus + desc->used; |
30200739 KH |
892 | |
893 | return d; | |
894 | } | |
895 | ||
295e3feb | 896 | static void context_run(struct context *ctx, u32 extra) |
30200739 KH |
897 | { |
898 | struct fw_ohci *ohci = ctx->ohci; | |
899 | ||
a77754a7 | 900 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
fe5ca634 | 901 | le32_to_cpu(ctx->last->branch_address)); |
a77754a7 KH |
902 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
903 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); | |
30200739 KH |
904 | flush_writes(ohci); |
905 | } | |
906 | ||
907 | static void context_append(struct context *ctx, | |
908 | struct descriptor *d, int z, int extra) | |
909 | { | |
910 | dma_addr_t d_bus; | |
fe5ca634 | 911 | struct descriptor_buffer *desc = ctx->buffer_tail; |
30200739 | 912 | |
fe5ca634 | 913 | d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d); |
30200739 | 914 | |
fe5ca634 DM |
915 | desc->used += (z + extra) * sizeof(*d); |
916 | ctx->prev->branch_address = cpu_to_le32(d_bus | z); | |
917 | ctx->prev = find_branch_descriptor(d, z); | |
30200739 | 918 | |
a77754a7 | 919 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
30200739 KH |
920 | flush_writes(ctx->ohci); |
921 | } | |
922 | ||
923 | static void context_stop(struct context *ctx) | |
924 | { | |
925 | u32 reg; | |
b8295668 | 926 | int i; |
30200739 | 927 | |
a77754a7 | 928 | reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
b8295668 | 929 | flush_writes(ctx->ohci); |
30200739 | 930 | |
b8295668 | 931 | for (i = 0; i < 10; i++) { |
a77754a7 | 932 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
b8295668 | 933 | if ((reg & CONTEXT_ACTIVE) == 0) |
b0068549 | 934 | return; |
b8295668 | 935 | |
b980f5a2 | 936 | mdelay(1); |
b8295668 | 937 | } |
b0068549 | 938 | fw_error("Error: DMA context still active (0x%08x)\n", reg); |
30200739 | 939 | } |
ed568912 | 940 | |
f319b6a0 KH |
941 | struct driver_data { |
942 | struct fw_packet *packet; | |
943 | }; | |
ed568912 | 944 | |
c781c06d KH |
945 | /* |
946 | * This function apppends a packet to the DMA queue for transmission. | |
f319b6a0 | 947 | * Must always be called with the ochi->lock held to ensure proper |
c781c06d KH |
948 | * generation handling and locking around packet queue manipulation. |
949 | */ | |
53dca511 SR |
950 | static int at_context_queue_packet(struct context *ctx, |
951 | struct fw_packet *packet) | |
ed568912 | 952 | { |
ed568912 | 953 | struct fw_ohci *ohci = ctx->ohci; |
4b6d51ec | 954 | dma_addr_t d_bus, uninitialized_var(payload_bus); |
f319b6a0 KH |
955 | struct driver_data *driver_data; |
956 | struct descriptor *d, *last; | |
957 | __le32 *header; | |
ed568912 | 958 | int z, tcode; |
f319b6a0 | 959 | u32 reg; |
ed568912 | 960 | |
f319b6a0 KH |
961 | d = context_get_descriptors(ctx, 4, &d_bus); |
962 | if (d == NULL) { | |
963 | packet->ack = RCODE_SEND_ERROR; | |
964 | return -1; | |
ed568912 KH |
965 | } |
966 | ||
a77754a7 | 967 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
f319b6a0 KH |
968 | d[0].res_count = cpu_to_le16(packet->timestamp); |
969 | ||
c781c06d KH |
970 | /* |
971 | * The DMA format for asyncronous link packets is different | |
ed568912 KH |
972 | * from the IEEE1394 layout, so shift the fields around |
973 | * accordingly. If header_length is 8, it's a PHY packet, to | |
c781c06d KH |
974 | * which we need to prepend an extra quadlet. |
975 | */ | |
f319b6a0 KH |
976 | |
977 | header = (__le32 *) &d[1]; | |
f8c2287c JF |
978 | switch (packet->header_length) { |
979 | case 16: | |
980 | case 12: | |
f319b6a0 KH |
981 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
982 | (packet->speed << 16)); | |
983 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
984 | (packet->header[0] & 0xffff0000)); | |
985 | header[2] = cpu_to_le32(packet->header[2]); | |
ed568912 KH |
986 | |
987 | tcode = (packet->header[0] >> 4) & 0x0f; | |
988 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
f319b6a0 | 989 | header[3] = cpu_to_le32(packet->header[3]); |
ed568912 | 990 | else |
f319b6a0 KH |
991 | header[3] = (__force __le32) packet->header[3]; |
992 | ||
993 | d[0].req_count = cpu_to_le16(packet->header_length); | |
f8c2287c JF |
994 | break; |
995 | ||
996 | case 8: | |
f319b6a0 KH |
997 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
998 | (packet->speed << 16)); | |
999 | header[1] = cpu_to_le32(packet->header[0]); | |
1000 | header[2] = cpu_to_le32(packet->header[1]); | |
1001 | d[0].req_count = cpu_to_le16(12); | |
f8c2287c JF |
1002 | break; |
1003 | ||
1004 | case 4: | |
1005 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | | |
1006 | (packet->speed << 16)); | |
1007 | header[1] = cpu_to_le32(packet->header[0] & 0xffff0000); | |
1008 | d[0].req_count = cpu_to_le16(8); | |
1009 | break; | |
1010 | ||
1011 | default: | |
1012 | /* BUG(); */ | |
1013 | packet->ack = RCODE_SEND_ERROR; | |
1014 | return -1; | |
ed568912 KH |
1015 | } |
1016 | ||
f319b6a0 KH |
1017 | driver_data = (struct driver_data *) &d[3]; |
1018 | driver_data->packet = packet; | |
20d11673 | 1019 | packet->driver_data = driver_data; |
a186b4a6 | 1020 | |
f319b6a0 KH |
1021 | if (packet->payload_length > 0) { |
1022 | payload_bus = | |
1023 | dma_map_single(ohci->card.device, packet->payload, | |
1024 | packet->payload_length, DMA_TO_DEVICE); | |
8d8bb39b | 1025 | if (dma_mapping_error(ohci->card.device, payload_bus)) { |
f319b6a0 KH |
1026 | packet->ack = RCODE_SEND_ERROR; |
1027 | return -1; | |
1028 | } | |
19593ffd SR |
1029 | packet->payload_bus = payload_bus; |
1030 | packet->payload_mapped = true; | |
f319b6a0 KH |
1031 | |
1032 | d[2].req_count = cpu_to_le16(packet->payload_length); | |
1033 | d[2].data_address = cpu_to_le32(payload_bus); | |
1034 | last = &d[2]; | |
1035 | z = 3; | |
ed568912 | 1036 | } else { |
f319b6a0 KH |
1037 | last = &d[0]; |
1038 | z = 2; | |
ed568912 | 1039 | } |
ed568912 | 1040 | |
a77754a7 KH |
1041 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
1042 | DESCRIPTOR_IRQ_ALWAYS | | |
1043 | DESCRIPTOR_BRANCH_ALWAYS); | |
ed568912 | 1044 | |
76f73ca1 JW |
1045 | /* |
1046 | * If the controller and packet generations don't match, we need to | |
1047 | * bail out and try again. If IntEvent.busReset is set, the AT context | |
1048 | * is halted, so appending to the context and trying to run it is | |
1049 | * futile. Most controllers do the right thing and just flush the AT | |
1050 | * queue (per section 7.2.3.2 of the OHCI 1.1 specification), but | |
1051 | * some controllers (like a JMicron JMB381 PCI-e) misbehave and wind | |
1052 | * up stalling out. So we just bail out in software and try again | |
1053 | * later, and everyone is happy. | |
1054 | * FIXME: Document how the locking works. | |
1055 | */ | |
1056 | if (ohci->generation != packet->generation || | |
1057 | reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) { | |
19593ffd | 1058 | if (packet->payload_mapped) |
ab88ca48 SR |
1059 | dma_unmap_single(ohci->card.device, payload_bus, |
1060 | packet->payload_length, DMA_TO_DEVICE); | |
f319b6a0 KH |
1061 | packet->ack = RCODE_GENERATION; |
1062 | return -1; | |
1063 | } | |
1064 | ||
1065 | context_append(ctx, d, z, 4 - z); | |
ed568912 | 1066 | |
f319b6a0 | 1067 | /* If the context isn't already running, start it up. */ |
a77754a7 | 1068 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
053b3080 | 1069 | if ((reg & CONTEXT_RUN) == 0) |
f319b6a0 KH |
1070 | context_run(ctx, 0); |
1071 | ||
1072 | return 0; | |
ed568912 KH |
1073 | } |
1074 | ||
f319b6a0 KH |
1075 | static int handle_at_packet(struct context *context, |
1076 | struct descriptor *d, | |
1077 | struct descriptor *last) | |
ed568912 | 1078 | { |
f319b6a0 | 1079 | struct driver_data *driver_data; |
ed568912 | 1080 | struct fw_packet *packet; |
f319b6a0 | 1081 | struct fw_ohci *ohci = context->ohci; |
ed568912 KH |
1082 | int evt; |
1083 | ||
f319b6a0 KH |
1084 | if (last->transfer_status == 0) |
1085 | /* This descriptor isn't done yet, stop iteration. */ | |
1086 | return 0; | |
ed568912 | 1087 | |
f319b6a0 KH |
1088 | driver_data = (struct driver_data *) &d[3]; |
1089 | packet = driver_data->packet; | |
1090 | if (packet == NULL) | |
1091 | /* This packet was cancelled, just continue. */ | |
1092 | return 1; | |
730c32f5 | 1093 | |
19593ffd | 1094 | if (packet->payload_mapped) |
1d1dc5e8 | 1095 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
ed568912 | 1096 | packet->payload_length, DMA_TO_DEVICE); |
ed568912 | 1097 | |
f319b6a0 KH |
1098 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
1099 | packet->timestamp = le16_to_cpu(last->res_count); | |
ed568912 | 1100 | |
ad3c0fe8 SR |
1101 | log_ar_at_event('T', packet->speed, packet->header, evt); |
1102 | ||
f319b6a0 KH |
1103 | switch (evt) { |
1104 | case OHCI1394_evt_timeout: | |
1105 | /* Async response transmit timed out. */ | |
1106 | packet->ack = RCODE_CANCELLED; | |
1107 | break; | |
ed568912 | 1108 | |
f319b6a0 | 1109 | case OHCI1394_evt_flushed: |
c781c06d KH |
1110 | /* |
1111 | * The packet was flushed should give same error as | |
1112 | * when we try to use a stale generation count. | |
1113 | */ | |
f319b6a0 KH |
1114 | packet->ack = RCODE_GENERATION; |
1115 | break; | |
ed568912 | 1116 | |
f319b6a0 | 1117 | case OHCI1394_evt_missing_ack: |
c781c06d KH |
1118 | /* |
1119 | * Using a valid (current) generation count, but the | |
1120 | * node is not on the bus or not sending acks. | |
1121 | */ | |
f319b6a0 KH |
1122 | packet->ack = RCODE_NO_ACK; |
1123 | break; | |
ed568912 | 1124 | |
f319b6a0 KH |
1125 | case ACK_COMPLETE + 0x10: |
1126 | case ACK_PENDING + 0x10: | |
1127 | case ACK_BUSY_X + 0x10: | |
1128 | case ACK_BUSY_A + 0x10: | |
1129 | case ACK_BUSY_B + 0x10: | |
1130 | case ACK_DATA_ERROR + 0x10: | |
1131 | case ACK_TYPE_ERROR + 0x10: | |
1132 | packet->ack = evt - 0x10; | |
1133 | break; | |
ed568912 | 1134 | |
f319b6a0 KH |
1135 | default: |
1136 | packet->ack = RCODE_SEND_ERROR; | |
1137 | break; | |
1138 | } | |
ed568912 | 1139 | |
f319b6a0 | 1140 | packet->callback(packet, &ohci->card, packet->ack); |
ed568912 | 1141 | |
f319b6a0 | 1142 | return 1; |
ed568912 KH |
1143 | } |
1144 | ||
a77754a7 KH |
1145 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
1146 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
1147 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
1148 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
1149 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
93c4cceb | 1150 | |
53dca511 SR |
1151 | static void handle_local_rom(struct fw_ohci *ohci, |
1152 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1153 | { |
1154 | struct fw_packet response; | |
1155 | int tcode, length, i; | |
1156 | ||
a77754a7 | 1157 | tcode = HEADER_GET_TCODE(packet->header[0]); |
93c4cceb | 1158 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
a77754a7 | 1159 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
93c4cceb KH |
1160 | else |
1161 | length = 4; | |
1162 | ||
1163 | i = csr - CSR_CONFIG_ROM; | |
1164 | if (i + length > CONFIG_ROM_SIZE) { | |
1165 | fw_fill_response(&response, packet->header, | |
1166 | RCODE_ADDRESS_ERROR, NULL, 0); | |
1167 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
1168 | fw_fill_response(&response, packet->header, | |
1169 | RCODE_TYPE_ERROR, NULL, 0); | |
1170 | } else { | |
1171 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
1172 | (void *) ohci->config_rom + i, length); | |
1173 | } | |
1174 | ||
1175 | fw_core_handle_response(&ohci->card, &response); | |
1176 | } | |
1177 | ||
53dca511 SR |
1178 | static void handle_local_lock(struct fw_ohci *ohci, |
1179 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1180 | { |
1181 | struct fw_packet response; | |
1182 | int tcode, length, ext_tcode, sel; | |
1183 | __be32 *payload, lock_old; | |
1184 | u32 lock_arg, lock_data; | |
1185 | ||
a77754a7 KH |
1186 | tcode = HEADER_GET_TCODE(packet->header[0]); |
1187 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); | |
93c4cceb | 1188 | payload = packet->payload; |
a77754a7 | 1189 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
93c4cceb KH |
1190 | |
1191 | if (tcode == TCODE_LOCK_REQUEST && | |
1192 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
1193 | lock_arg = be32_to_cpu(payload[0]); | |
1194 | lock_data = be32_to_cpu(payload[1]); | |
1195 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1196 | lock_arg = 0; | |
1197 | lock_data = 0; | |
1198 | } else { | |
1199 | fw_fill_response(&response, packet->header, | |
1200 | RCODE_TYPE_ERROR, NULL, 0); | |
1201 | goto out; | |
1202 | } | |
1203 | ||
1204 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
1205 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
1206 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
1207 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
1208 | ||
1209 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) | |
1210 | lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData)); | |
1211 | else | |
1212 | fw_notify("swap not done yet\n"); | |
1213 | ||
1214 | fw_fill_response(&response, packet->header, | |
2d826cc5 | 1215 | RCODE_COMPLETE, &lock_old, sizeof(lock_old)); |
93c4cceb KH |
1216 | out: |
1217 | fw_core_handle_response(&ohci->card, &response); | |
1218 | } | |
1219 | ||
53dca511 | 1220 | static void handle_local_request(struct context *ctx, struct fw_packet *packet) |
93c4cceb KH |
1221 | { |
1222 | u64 offset; | |
1223 | u32 csr; | |
1224 | ||
473d28c7 KH |
1225 | if (ctx == &ctx->ohci->at_request_ctx) { |
1226 | packet->ack = ACK_PENDING; | |
1227 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1228 | } | |
93c4cceb KH |
1229 | |
1230 | offset = | |
1231 | ((unsigned long long) | |
a77754a7 | 1232 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
93c4cceb KH |
1233 | packet->header[2]; |
1234 | csr = offset - CSR_REGISTER_BASE; | |
1235 | ||
1236 | /* Handle config rom reads. */ | |
1237 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
1238 | handle_local_rom(ctx->ohci, packet, csr); | |
1239 | else switch (csr) { | |
1240 | case CSR_BUS_MANAGER_ID: | |
1241 | case CSR_BANDWIDTH_AVAILABLE: | |
1242 | case CSR_CHANNELS_AVAILABLE_HI: | |
1243 | case CSR_CHANNELS_AVAILABLE_LO: | |
1244 | handle_local_lock(ctx->ohci, packet, csr); | |
1245 | break; | |
1246 | default: | |
1247 | if (ctx == &ctx->ohci->at_request_ctx) | |
1248 | fw_core_handle_request(&ctx->ohci->card, packet); | |
1249 | else | |
1250 | fw_core_handle_response(&ctx->ohci->card, packet); | |
1251 | break; | |
1252 | } | |
473d28c7 KH |
1253 | |
1254 | if (ctx == &ctx->ohci->at_response_ctx) { | |
1255 | packet->ack = ACK_COMPLETE; | |
1256 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1257 | } | |
93c4cceb | 1258 | } |
e636fe25 | 1259 | |
53dca511 | 1260 | static void at_context_transmit(struct context *ctx, struct fw_packet *packet) |
ed568912 | 1261 | { |
ed568912 | 1262 | unsigned long flags; |
2dbd7d7e | 1263 | int ret; |
ed568912 KH |
1264 | |
1265 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
1266 | ||
a77754a7 | 1267 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
e636fe25 | 1268 | ctx->ohci->generation == packet->generation) { |
93c4cceb KH |
1269 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1270 | handle_local_request(ctx, packet); | |
1271 | return; | |
e636fe25 | 1272 | } |
ed568912 | 1273 | |
2dbd7d7e | 1274 | ret = at_context_queue_packet(ctx, packet); |
ed568912 KH |
1275 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1276 | ||
2dbd7d7e | 1277 | if (ret < 0) |
f319b6a0 | 1278 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
a186b4a6 | 1279 | |
ed568912 KH |
1280 | } |
1281 | ||
1282 | static void bus_reset_tasklet(unsigned long data) | |
1283 | { | |
1284 | struct fw_ohci *ohci = (struct fw_ohci *)data; | |
e636fe25 | 1285 | int self_id_count, i, j, reg; |
ed568912 KH |
1286 | int generation, new_generation; |
1287 | unsigned long flags; | |
4eaff7d6 SR |
1288 | void *free_rom = NULL; |
1289 | dma_addr_t free_rom_bus = 0; | |
ed568912 KH |
1290 | |
1291 | reg = reg_read(ohci, OHCI1394_NodeID); | |
1292 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
02ff8f8e | 1293 | fw_notify("node ID not valid, new bus reset in progress\n"); |
ed568912 KH |
1294 | return; |
1295 | } | |
02ff8f8e SR |
1296 | if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { |
1297 | fw_notify("malconfigured bus\n"); | |
1298 | return; | |
1299 | } | |
1300 | ohci->node_id = reg & (OHCI1394_NodeID_busNumber | | |
1301 | OHCI1394_NodeID_nodeNumber); | |
ed568912 | 1302 | |
c8a9a498 SR |
1303 | reg = reg_read(ohci, OHCI1394_SelfIDCount); |
1304 | if (reg & OHCI1394_SelfIDCount_selfIDError) { | |
1305 | fw_notify("inconsistent self IDs\n"); | |
1306 | return; | |
1307 | } | |
c781c06d KH |
1308 | /* |
1309 | * The count in the SelfIDCount register is the number of | |
ed568912 KH |
1310 | * bytes in the self ID receive buffer. Since we also receive |
1311 | * the inverted quadlets and a header quadlet, we shift one | |
c781c06d KH |
1312 | * bit extra to get the actual number of self IDs. |
1313 | */ | |
928ec5f1 SR |
1314 | self_id_count = (reg >> 3) & 0xff; |
1315 | if (self_id_count == 0 || self_id_count > 252) { | |
016bf3df SR |
1316 | fw_notify("inconsistent self IDs\n"); |
1317 | return; | |
1318 | } | |
11bf20ad | 1319 | generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; |
ee71c2f9 | 1320 | rmb(); |
ed568912 KH |
1321 | |
1322 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
c8a9a498 SR |
1323 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) { |
1324 | fw_notify("inconsistent self IDs\n"); | |
1325 | return; | |
1326 | } | |
11bf20ad SR |
1327 | ohci->self_id_buffer[j] = |
1328 | cond_le32_to_cpu(ohci->self_id_cpu[i]); | |
ed568912 | 1329 | } |
ee71c2f9 | 1330 | rmb(); |
ed568912 | 1331 | |
c781c06d KH |
1332 | /* |
1333 | * Check the consistency of the self IDs we just read. The | |
ed568912 KH |
1334 | * problem we face is that a new bus reset can start while we |
1335 | * read out the self IDs from the DMA buffer. If this happens, | |
1336 | * the DMA buffer will be overwritten with new self IDs and we | |
1337 | * will read out inconsistent data. The OHCI specification | |
1338 | * (section 11.2) recommends a technique similar to | |
1339 | * linux/seqlock.h, where we remember the generation of the | |
1340 | * self IDs in the buffer before reading them out and compare | |
1341 | * it to the current generation after reading them out. If | |
1342 | * the two generations match we know we have a consistent set | |
c781c06d KH |
1343 | * of self IDs. |
1344 | */ | |
ed568912 KH |
1345 | |
1346 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
1347 | if (new_generation != generation) { | |
1348 | fw_notify("recursive bus reset detected, " | |
1349 | "discarding self ids\n"); | |
1350 | return; | |
1351 | } | |
1352 | ||
1353 | /* FIXME: Document how the locking works. */ | |
1354 | spin_lock_irqsave(&ohci->lock, flags); | |
1355 | ||
1356 | ohci->generation = generation; | |
f319b6a0 KH |
1357 | context_stop(&ohci->at_request_ctx); |
1358 | context_stop(&ohci->at_response_ctx); | |
ed568912 KH |
1359 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
1360 | ||
4a635593 | 1361 | if (ohci->quirks & QUIRK_RESET_PACKET) |
d34316a4 SR |
1362 | ohci->request_generation = generation; |
1363 | ||
c781c06d KH |
1364 | /* |
1365 | * This next bit is unrelated to the AT context stuff but we | |
ed568912 KH |
1366 | * have to do it under the spinlock also. If a new config rom |
1367 | * was set up before this reset, the old one is now no longer | |
1368 | * in use and we can free it. Update the config rom pointers | |
1369 | * to point to the current config rom and clear the | |
c781c06d KH |
1370 | * next_config_rom pointer so a new udpate can take place. |
1371 | */ | |
ed568912 KH |
1372 | |
1373 | if (ohci->next_config_rom != NULL) { | |
0bd243c4 KH |
1374 | if (ohci->next_config_rom != ohci->config_rom) { |
1375 | free_rom = ohci->config_rom; | |
1376 | free_rom_bus = ohci->config_rom_bus; | |
1377 | } | |
ed568912 KH |
1378 | ohci->config_rom = ohci->next_config_rom; |
1379 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
1380 | ohci->next_config_rom = NULL; | |
1381 | ||
c781c06d KH |
1382 | /* |
1383 | * Restore config_rom image and manually update | |
ed568912 KH |
1384 | * config_rom registers. Writing the header quadlet |
1385 | * will indicate that the config rom is ready, so we | |
c781c06d KH |
1386 | * do that last. |
1387 | */ | |
ed568912 KH |
1388 | reg_write(ohci, OHCI1394_BusOptions, |
1389 | be32_to_cpu(ohci->config_rom[2])); | |
8e85973e SR |
1390 | ohci->config_rom[0] = ohci->next_header; |
1391 | reg_write(ohci, OHCI1394_ConfigROMhdr, | |
1392 | be32_to_cpu(ohci->next_header)); | |
ed568912 KH |
1393 | } |
1394 | ||
080de8c2 SR |
1395 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
1396 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); | |
1397 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); | |
1398 | #endif | |
1399 | ||
ed568912 KH |
1400 | spin_unlock_irqrestore(&ohci->lock, flags); |
1401 | ||
4eaff7d6 SR |
1402 | if (free_rom) |
1403 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1404 | free_rom, free_rom_bus); | |
1405 | ||
08ddb2f4 SR |
1406 | log_selfids(ohci->node_id, generation, |
1407 | self_id_count, ohci->self_id_buffer); | |
ad3c0fe8 | 1408 | |
e636fe25 | 1409 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
ed568912 KH |
1410 | self_id_count, ohci->self_id_buffer); |
1411 | } | |
1412 | ||
1413 | static irqreturn_t irq_handler(int irq, void *data) | |
1414 | { | |
1415 | struct fw_ohci *ohci = data; | |
168cf9af | 1416 | u32 event, iso_event; |
ed568912 KH |
1417 | int i; |
1418 | ||
1419 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
1420 | ||
a515958d | 1421 | if (!event || !~event) |
ed568912 KH |
1422 | return IRQ_NONE; |
1423 | ||
a007bb85 SR |
1424 | /* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */ |
1425 | reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset); | |
ad3c0fe8 | 1426 | log_irqs(event); |
ed568912 KH |
1427 | |
1428 | if (event & OHCI1394_selfIDComplete) | |
1429 | tasklet_schedule(&ohci->bus_reset_tasklet); | |
1430 | ||
1431 | if (event & OHCI1394_RQPkt) | |
1432 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
1433 | ||
1434 | if (event & OHCI1394_RSPkt) | |
1435 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
1436 | ||
1437 | if (event & OHCI1394_reqTxComplete) | |
1438 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
1439 | ||
1440 | if (event & OHCI1394_respTxComplete) | |
1441 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
1442 | ||
c889475f | 1443 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); |
ed568912 KH |
1444 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); |
1445 | ||
1446 | while (iso_event) { | |
1447 | i = ffs(iso_event) - 1; | |
30200739 | 1448 | tasklet_schedule(&ohci->ir_context_list[i].context.tasklet); |
ed568912 KH |
1449 | iso_event &= ~(1 << i); |
1450 | } | |
1451 | ||
c889475f | 1452 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); |
ed568912 KH |
1453 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); |
1454 | ||
1455 | while (iso_event) { | |
1456 | i = ffs(iso_event) - 1; | |
30200739 | 1457 | tasklet_schedule(&ohci->it_context_list[i].context.tasklet); |
ed568912 KH |
1458 | iso_event &= ~(1 << i); |
1459 | } | |
1460 | ||
75f7832e JW |
1461 | if (unlikely(event & OHCI1394_regAccessFail)) |
1462 | fw_error("Register access failure - " | |
1463 | "please notify linux1394-devel@lists.sf.net\n"); | |
1464 | ||
e524f616 SR |
1465 | if (unlikely(event & OHCI1394_postedWriteErr)) |
1466 | fw_error("PCI posted write error\n"); | |
1467 | ||
bb9f2206 SR |
1468 | if (unlikely(event & OHCI1394_cycleTooLong)) { |
1469 | if (printk_ratelimit()) | |
1470 | fw_notify("isochronous cycle too long\n"); | |
1471 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1472 | OHCI1394_LinkControl_cycleMaster); | |
1473 | } | |
1474 | ||
5ed1f321 JF |
1475 | if (unlikely(event & OHCI1394_cycleInconsistent)) { |
1476 | /* | |
1477 | * We need to clear this event bit in order to make | |
1478 | * cycleMatch isochronous I/O work. In theory we should | |
1479 | * stop active cycleMatch iso contexts now and restart | |
1480 | * them at least two cycles later. (FIXME?) | |
1481 | */ | |
1482 | if (printk_ratelimit()) | |
1483 | fw_notify("isochronous cycle inconsistent\n"); | |
1484 | } | |
1485 | ||
ed568912 KH |
1486 | return IRQ_HANDLED; |
1487 | } | |
1488 | ||
2aef469a KH |
1489 | static int software_reset(struct fw_ohci *ohci) |
1490 | { | |
1491 | int i; | |
1492 | ||
1493 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
1494 | ||
1495 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
1496 | if ((reg_read(ohci, OHCI1394_HCControlSet) & | |
1497 | OHCI1394_HCControl_softReset) == 0) | |
1498 | return 0; | |
1499 | msleep(1); | |
1500 | } | |
1501 | ||
1502 | return -EBUSY; | |
1503 | } | |
1504 | ||
8e85973e SR |
1505 | static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length) |
1506 | { | |
1507 | size_t size = length * 4; | |
1508 | ||
1509 | memcpy(dest, src, size); | |
1510 | if (size < CONFIG_ROM_SIZE) | |
1511 | memset(&dest[length], 0, CONFIG_ROM_SIZE - size); | |
1512 | } | |
1513 | ||
1514 | static int ohci_enable(struct fw_card *card, | |
1515 | const __be32 *config_rom, size_t length) | |
ed568912 KH |
1516 | { |
1517 | struct fw_ohci *ohci = fw_ohci(card); | |
1518 | struct pci_dev *dev = to_pci_dev(card->device); | |
02214724 JW |
1519 | u32 lps; |
1520 | int i; | |
ed568912 | 1521 | |
2aef469a KH |
1522 | if (software_reset(ohci)) { |
1523 | fw_error("Failed to reset ohci card.\n"); | |
1524 | return -EBUSY; | |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * Now enable LPS, which we need in order to start accessing | |
1529 | * most of the registers. In fact, on some cards (ALI M5251), | |
1530 | * accessing registers in the SClk domain without LPS enabled | |
1531 | * will lock up the machine. Wait 50msec to make sure we have | |
02214724 JW |
1532 | * full link enabled. However, with some cards (well, at least |
1533 | * a JMicron PCIe card), we have to try again sometimes. | |
2aef469a KH |
1534 | */ |
1535 | reg_write(ohci, OHCI1394_HCControlSet, | |
1536 | OHCI1394_HCControl_LPS | | |
1537 | OHCI1394_HCControl_postedWriteEnable); | |
1538 | flush_writes(ohci); | |
02214724 JW |
1539 | |
1540 | for (lps = 0, i = 0; !lps && i < 3; i++) { | |
1541 | msleep(50); | |
1542 | lps = reg_read(ohci, OHCI1394_HCControlSet) & | |
1543 | OHCI1394_HCControl_LPS; | |
1544 | } | |
1545 | ||
1546 | if (!lps) { | |
1547 | fw_error("Failed to set Link Power Status\n"); | |
1548 | return -EIO; | |
1549 | } | |
2aef469a KH |
1550 | |
1551 | reg_write(ohci, OHCI1394_HCControlClear, | |
1552 | OHCI1394_HCControl_noByteSwapData); | |
1553 | ||
affc9c24 | 1554 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); |
e896ec43 SR |
1555 | reg_write(ohci, OHCI1394_LinkControlClear, |
1556 | OHCI1394_LinkControl_rcvPhyPkt); | |
2aef469a KH |
1557 | reg_write(ohci, OHCI1394_LinkControlSet, |
1558 | OHCI1394_LinkControl_rcvSelfID | | |
1559 | OHCI1394_LinkControl_cycleTimerEnable | | |
1560 | OHCI1394_LinkControl_cycleMaster); | |
1561 | ||
1562 | reg_write(ohci, OHCI1394_ATRetries, | |
1563 | OHCI1394_MAX_AT_REQ_RETRIES | | |
1564 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
1565 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8)); | |
1566 | ||
1567 | ar_context_run(&ohci->ar_request_ctx); | |
1568 | ar_context_run(&ohci->ar_response_ctx); | |
1569 | ||
2aef469a KH |
1570 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); |
1571 | reg_write(ohci, OHCI1394_IntEventClear, ~0); | |
1572 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
1573 | reg_write(ohci, OHCI1394_IntMaskSet, | |
1574 | OHCI1394_selfIDComplete | | |
1575 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
1576 | OHCI1394_reqTxComplete | OHCI1394_respTxComplete | | |
1577 | OHCI1394_isochRx | OHCI1394_isochTx | | |
bb9f2206 | 1578 | OHCI1394_postedWriteErr | OHCI1394_cycleTooLong | |
168cf9af | 1579 | OHCI1394_cycleInconsistent | OHCI1394_regAccessFail | |
75f7832e | 1580 | OHCI1394_masterIntEnable); |
a007bb85 SR |
1581 | if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) |
1582 | reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset); | |
2aef469a KH |
1583 | |
1584 | /* Activate link_on bit and contender bit in our self ID packets.*/ | |
1585 | if (ohci_update_phy_reg(card, 4, 0, | |
1586 | PHY_LINK_ACTIVE | PHY_CONTENDER) < 0) | |
1587 | return -EIO; | |
1588 | ||
c781c06d KH |
1589 | /* |
1590 | * When the link is not yet enabled, the atomic config rom | |
ed568912 KH |
1591 | * update mechanism described below in ohci_set_config_rom() |
1592 | * is not active. We have to update ConfigRomHeader and | |
1593 | * BusOptions manually, and the write to ConfigROMmap takes | |
1594 | * effect immediately. We tie this to the enabling of the | |
1595 | * link, so we have a valid config rom before enabling - the | |
1596 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
1597 | * values before enabling. | |
1598 | * | |
1599 | * However, when the ConfigROMmap is written, some controllers | |
1600 | * always read back quadlets 0 and 2 from the config rom to | |
1601 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
1602 | * They shouldn't do that in this initial case where the link | |
1603 | * isn't enabled. This means we have to use the same | |
1604 | * workaround here, setting the bus header to 0 and then write | |
1605 | * the right values in the bus reset tasklet. | |
1606 | */ | |
1607 | ||
0bd243c4 KH |
1608 | if (config_rom) { |
1609 | ohci->next_config_rom = | |
1610 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1611 | &ohci->next_config_rom_bus, | |
1612 | GFP_KERNEL); | |
1613 | if (ohci->next_config_rom == NULL) | |
1614 | return -ENOMEM; | |
ed568912 | 1615 | |
8e85973e | 1616 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
0bd243c4 KH |
1617 | } else { |
1618 | /* | |
1619 | * In the suspend case, config_rom is NULL, which | |
1620 | * means that we just reuse the old config rom. | |
1621 | */ | |
1622 | ohci->next_config_rom = ohci->config_rom; | |
1623 | ohci->next_config_rom_bus = ohci->config_rom_bus; | |
1624 | } | |
ed568912 | 1625 | |
8e85973e | 1626 | ohci->next_header = ohci->next_config_rom[0]; |
ed568912 KH |
1627 | ohci->next_config_rom[0] = 0; |
1628 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
0bd243c4 KH |
1629 | reg_write(ohci, OHCI1394_BusOptions, |
1630 | be32_to_cpu(ohci->next_config_rom[2])); | |
ed568912 KH |
1631 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
1632 | ||
1633 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
1634 | ||
1635 | if (request_irq(dev->irq, irq_handler, | |
65efffa8 | 1636 | IRQF_SHARED, ohci_driver_name, ohci)) { |
ed568912 KH |
1637 | fw_error("Failed to allocate shared interrupt %d.\n", |
1638 | dev->irq); | |
1639 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1640 | ohci->config_rom, ohci->config_rom_bus); | |
1641 | return -EIO; | |
1642 | } | |
1643 | ||
1644 | reg_write(ohci, OHCI1394_HCControlSet, | |
1645 | OHCI1394_HCControl_linkEnable | | |
1646 | OHCI1394_HCControl_BIBimageValid); | |
1647 | flush_writes(ohci); | |
1648 | ||
c781c06d KH |
1649 | /* |
1650 | * We are ready to go, initiate bus reset to finish the | |
1651 | * initialization. | |
1652 | */ | |
ed568912 KH |
1653 | |
1654 | fw_core_initiate_bus_reset(&ohci->card, 1); | |
1655 | ||
1656 | return 0; | |
1657 | } | |
1658 | ||
53dca511 | 1659 | static int ohci_set_config_rom(struct fw_card *card, |
8e85973e | 1660 | const __be32 *config_rom, size_t length) |
ed568912 KH |
1661 | { |
1662 | struct fw_ohci *ohci; | |
1663 | unsigned long flags; | |
2dbd7d7e | 1664 | int ret = -EBUSY; |
ed568912 | 1665 | __be32 *next_config_rom; |
f5101d58 | 1666 | dma_addr_t uninitialized_var(next_config_rom_bus); |
ed568912 KH |
1667 | |
1668 | ohci = fw_ohci(card); | |
1669 | ||
c781c06d KH |
1670 | /* |
1671 | * When the OHCI controller is enabled, the config rom update | |
ed568912 KH |
1672 | * mechanism is a bit tricky, but easy enough to use. See |
1673 | * section 5.5.6 in the OHCI specification. | |
1674 | * | |
1675 | * The OHCI controller caches the new config rom address in a | |
1676 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
1677 | * for the changes to take place. When the bus reset is | |
1678 | * detected, the controller loads the new values for the | |
1679 | * ConfigRomHeader and BusOptions registers from the specified | |
1680 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
1681 | * shadow register. All automatically and atomically. | |
1682 | * | |
1683 | * Now, there's a twist to this story. The automatic load of | |
1684 | * ConfigRomHeader and BusOptions doesn't honor the | |
1685 | * noByteSwapData bit, so with a be32 config rom, the | |
1686 | * controller will load be32 values in to these registers | |
1687 | * during the atomic update, even on litte endian | |
1688 | * architectures. The workaround we use is to put a 0 in the | |
1689 | * header quadlet; 0 is endian agnostic and means that the | |
1690 | * config rom isn't ready yet. In the bus reset tasklet we | |
1691 | * then set up the real values for the two registers. | |
1692 | * | |
1693 | * We use ohci->lock to avoid racing with the code that sets | |
1694 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). | |
1695 | */ | |
1696 | ||
1697 | next_config_rom = | |
1698 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1699 | &next_config_rom_bus, GFP_KERNEL); | |
1700 | if (next_config_rom == NULL) | |
1701 | return -ENOMEM; | |
1702 | ||
1703 | spin_lock_irqsave(&ohci->lock, flags); | |
1704 | ||
1705 | if (ohci->next_config_rom == NULL) { | |
1706 | ohci->next_config_rom = next_config_rom; | |
1707 | ohci->next_config_rom_bus = next_config_rom_bus; | |
1708 | ||
8e85973e | 1709 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
ed568912 KH |
1710 | |
1711 | ohci->next_header = config_rom[0]; | |
1712 | ohci->next_config_rom[0] = 0; | |
1713 | ||
1714 | reg_write(ohci, OHCI1394_ConfigROMmap, | |
1715 | ohci->next_config_rom_bus); | |
2dbd7d7e | 1716 | ret = 0; |
ed568912 KH |
1717 | } |
1718 | ||
1719 | spin_unlock_irqrestore(&ohci->lock, flags); | |
1720 | ||
c781c06d KH |
1721 | /* |
1722 | * Now initiate a bus reset to have the changes take | |
ed568912 KH |
1723 | * effect. We clean up the old config rom memory and DMA |
1724 | * mappings in the bus reset tasklet, since the OHCI | |
1725 | * controller could need to access it before the bus reset | |
c781c06d KH |
1726 | * takes effect. |
1727 | */ | |
2dbd7d7e | 1728 | if (ret == 0) |
ed568912 | 1729 | fw_core_initiate_bus_reset(&ohci->card, 1); |
4eaff7d6 SR |
1730 | else |
1731 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1732 | next_config_rom, next_config_rom_bus); | |
ed568912 | 1733 | |
2dbd7d7e | 1734 | return ret; |
ed568912 KH |
1735 | } |
1736 | ||
1737 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
1738 | { | |
1739 | struct fw_ohci *ohci = fw_ohci(card); | |
1740 | ||
1741 | at_context_transmit(&ohci->at_request_ctx, packet); | |
1742 | } | |
1743 | ||
1744 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
1745 | { | |
1746 | struct fw_ohci *ohci = fw_ohci(card); | |
1747 | ||
1748 | at_context_transmit(&ohci->at_response_ctx, packet); | |
1749 | } | |
1750 | ||
730c32f5 KH |
1751 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
1752 | { | |
1753 | struct fw_ohci *ohci = fw_ohci(card); | |
f319b6a0 KH |
1754 | struct context *ctx = &ohci->at_request_ctx; |
1755 | struct driver_data *driver_data = packet->driver_data; | |
2dbd7d7e | 1756 | int ret = -ENOENT; |
730c32f5 | 1757 | |
f319b6a0 | 1758 | tasklet_disable(&ctx->tasklet); |
730c32f5 | 1759 | |
f319b6a0 KH |
1760 | if (packet->ack != 0) |
1761 | goto out; | |
730c32f5 | 1762 | |
19593ffd | 1763 | if (packet->payload_mapped) |
1d1dc5e8 SR |
1764 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
1765 | packet->payload_length, DMA_TO_DEVICE); | |
1766 | ||
ad3c0fe8 | 1767 | log_ar_at_event('T', packet->speed, packet->header, 0x20); |
f319b6a0 KH |
1768 | driver_data->packet = NULL; |
1769 | packet->ack = RCODE_CANCELLED; | |
1770 | packet->callback(packet, &ohci->card, packet->ack); | |
2dbd7d7e | 1771 | ret = 0; |
f319b6a0 KH |
1772 | out: |
1773 | tasklet_enable(&ctx->tasklet); | |
730c32f5 | 1774 | |
2dbd7d7e | 1775 | return ret; |
730c32f5 KH |
1776 | } |
1777 | ||
53dca511 SR |
1778 | static int ohci_enable_phys_dma(struct fw_card *card, |
1779 | int node_id, int generation) | |
ed568912 | 1780 | { |
080de8c2 SR |
1781 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
1782 | return 0; | |
1783 | #else | |
ed568912 KH |
1784 | struct fw_ohci *ohci = fw_ohci(card); |
1785 | unsigned long flags; | |
2dbd7d7e | 1786 | int n, ret = 0; |
ed568912 | 1787 | |
c781c06d KH |
1788 | /* |
1789 | * FIXME: Make sure this bitmask is cleared when we clear the busReset | |
1790 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. | |
1791 | */ | |
ed568912 KH |
1792 | |
1793 | spin_lock_irqsave(&ohci->lock, flags); | |
1794 | ||
1795 | if (ohci->generation != generation) { | |
2dbd7d7e | 1796 | ret = -ESTALE; |
ed568912 KH |
1797 | goto out; |
1798 | } | |
1799 | ||
c781c06d KH |
1800 | /* |
1801 | * Note, if the node ID contains a non-local bus ID, physical DMA is | |
1802 | * enabled for _all_ nodes on remote buses. | |
1803 | */ | |
907293d7 SR |
1804 | |
1805 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
1806 | if (n < 32) | |
1807 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
1808 | else | |
1809 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
1810 | ||
ed568912 | 1811 | flush_writes(ohci); |
ed568912 | 1812 | out: |
6cad95fe | 1813 | spin_unlock_irqrestore(&ohci->lock, flags); |
2dbd7d7e SR |
1814 | |
1815 | return ret; | |
080de8c2 | 1816 | #endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */ |
ed568912 | 1817 | } |
373b2edd | 1818 | |
4a9bde9b | 1819 | static u32 cycle_timer_ticks(u32 cycle_timer) |
b677532b CL |
1820 | { |
1821 | u32 ticks; | |
1822 | ||
1823 | ticks = cycle_timer & 0xfff; | |
1824 | ticks += 3072 * ((cycle_timer >> 12) & 0x1fff); | |
1825 | ticks += (3072 * 8000) * (cycle_timer >> 25); | |
4a9bde9b | 1826 | |
b677532b CL |
1827 | return ticks; |
1828 | } | |
1829 | ||
4a9bde9b SR |
1830 | /* |
1831 | * Some controllers exhibit one or more of the following bugs when updating the | |
1832 | * iso cycle timer register: | |
1833 | * - When the lowest six bits are wrapping around to zero, a read that happens | |
1834 | * at the same time will return garbage in the lowest ten bits. | |
1835 | * - When the cycleOffset field wraps around to zero, the cycleCount field is | |
1836 | * not incremented for about 60 ns. | |
1837 | * - Occasionally, the entire register reads zero. | |
1838 | * | |
1839 | * To catch these, we read the register three times and ensure that the | |
1840 | * difference between each two consecutive reads is approximately the same, i.e. | |
1841 | * less than twice the other. Furthermore, any negative difference indicates an | |
1842 | * error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to | |
1843 | * execute, so we have enough precision to compute the ratio of the differences.) | |
1844 | */ | |
168cf9af | 1845 | static u32 ohci_get_cycle_time(struct fw_card *card) |
d60d7f1d KH |
1846 | { |
1847 | struct fw_ohci *ohci = fw_ohci(card); | |
b677532b CL |
1848 | u32 c0, c1, c2; |
1849 | u32 t0, t1, t2; | |
1850 | s32 diff01, diff12; | |
4a9bde9b | 1851 | int i; |
d60d7f1d | 1852 | |
4a9bde9b SR |
1853 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); |
1854 | ||
4a635593 | 1855 | if (ohci->quirks & QUIRK_CYCLE_TIMER) { |
4a9bde9b SR |
1856 | i = 0; |
1857 | c1 = c2; | |
b677532b | 1858 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); |
b677532b | 1859 | do { |
4a9bde9b SR |
1860 | c0 = c1; |
1861 | c1 = c2; | |
b677532b CL |
1862 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); |
1863 | t0 = cycle_timer_ticks(c0); | |
1864 | t1 = cycle_timer_ticks(c1); | |
1865 | t2 = cycle_timer_ticks(c2); | |
1866 | diff01 = t1 - t0; | |
1867 | diff12 = t2 - t1; | |
4a9bde9b SR |
1868 | } while ((diff01 <= 0 || diff12 <= 0 || |
1869 | diff01 / diff12 >= 2 || diff12 / diff01 >= 2) | |
1870 | && i++ < 20); | |
b677532b | 1871 | } |
d60d7f1d | 1872 | |
168cf9af | 1873 | return c2; |
d60d7f1d KH |
1874 | } |
1875 | ||
1aa292bb DM |
1876 | static void copy_iso_headers(struct iso_context *ctx, void *p) |
1877 | { | |
1878 | int i = ctx->header_length; | |
1879 | ||
1880 | if (i + ctx->base.header_size > PAGE_SIZE) | |
1881 | return; | |
1882 | ||
1883 | /* | |
1884 | * The iso header is byteswapped to little endian by | |
1885 | * the controller, but the remaining header quadlets | |
1886 | * are big endian. We want to present all the headers | |
1887 | * as big endian, so we have to swap the first quadlet. | |
1888 | */ | |
1889 | if (ctx->base.header_size > 0) | |
1890 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); | |
1891 | if (ctx->base.header_size > 4) | |
1892 | *(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p); | |
1893 | if (ctx->base.header_size > 8) | |
1894 | memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8); | |
1895 | ctx->header_length += ctx->base.header_size; | |
1896 | } | |
1897 | ||
a186b4a6 JW |
1898 | static int handle_ir_packet_per_buffer(struct context *context, |
1899 | struct descriptor *d, | |
1900 | struct descriptor *last) | |
1901 | { | |
1902 | struct iso_context *ctx = | |
1903 | container_of(context, struct iso_context, context); | |
bcee893c | 1904 | struct descriptor *pd; |
a186b4a6 | 1905 | __le32 *ir_header; |
bcee893c | 1906 | void *p; |
a186b4a6 | 1907 | |
bcee893c DM |
1908 | for (pd = d; pd <= last; pd++) { |
1909 | if (pd->transfer_status) | |
1910 | break; | |
1911 | } | |
1912 | if (pd > last) | |
a186b4a6 JW |
1913 | /* Descriptor(s) not done yet, stop iteration */ |
1914 | return 0; | |
1915 | ||
1aa292bb DM |
1916 | p = last + 1; |
1917 | copy_iso_headers(ctx, p); | |
a186b4a6 | 1918 | |
bcee893c DM |
1919 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { |
1920 | ir_header = (__le32 *) p; | |
a186b4a6 JW |
1921 | ctx->base.callback(&ctx->base, |
1922 | le32_to_cpu(ir_header[0]) & 0xffff, | |
1923 | ctx->header_length, ctx->header, | |
1924 | ctx->base.callback_data); | |
1925 | ctx->header_length = 0; | |
1926 | } | |
1927 | ||
a186b4a6 JW |
1928 | return 1; |
1929 | } | |
1930 | ||
30200739 KH |
1931 | static int handle_it_packet(struct context *context, |
1932 | struct descriptor *d, | |
1933 | struct descriptor *last) | |
ed568912 | 1934 | { |
30200739 KH |
1935 | struct iso_context *ctx = |
1936 | container_of(context, struct iso_context, context); | |
31769cef JF |
1937 | int i; |
1938 | struct descriptor *pd; | |
373b2edd | 1939 | |
31769cef JF |
1940 | for (pd = d; pd <= last; pd++) |
1941 | if (pd->transfer_status) | |
1942 | break; | |
1943 | if (pd > last) | |
1944 | /* Descriptor(s) not done yet, stop iteration */ | |
30200739 KH |
1945 | return 0; |
1946 | ||
31769cef JF |
1947 | i = ctx->header_length; |
1948 | if (i + 4 < PAGE_SIZE) { | |
1949 | /* Present this value as big-endian to match the receive code */ | |
1950 | *(__be32 *)(ctx->header + i) = cpu_to_be32( | |
1951 | ((u32)le16_to_cpu(pd->transfer_status) << 16) | | |
1952 | le16_to_cpu(pd->res_count)); | |
1953 | ctx->header_length += 4; | |
1954 | } | |
1955 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { | |
9b32d5f3 | 1956 | ctx->base.callback(&ctx->base, le16_to_cpu(last->res_count), |
31769cef JF |
1957 | ctx->header_length, ctx->header, |
1958 | ctx->base.callback_data); | |
1959 | ctx->header_length = 0; | |
1960 | } | |
30200739 | 1961 | return 1; |
ed568912 KH |
1962 | } |
1963 | ||
53dca511 | 1964 | static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, |
4817ed24 | 1965 | int type, int channel, size_t header_size) |
ed568912 KH |
1966 | { |
1967 | struct fw_ohci *ohci = fw_ohci(card); | |
1968 | struct iso_context *ctx, *list; | |
30200739 | 1969 | descriptor_callback_t callback; |
4817ed24 | 1970 | u64 *channels, dont_care = ~0ULL; |
295e3feb | 1971 | u32 *mask, regs; |
ed568912 | 1972 | unsigned long flags; |
2dbd7d7e | 1973 | int index, ret = -ENOMEM; |
ed568912 KH |
1974 | |
1975 | if (type == FW_ISO_CONTEXT_TRANSMIT) { | |
4817ed24 | 1976 | channels = &dont_care; |
ed568912 KH |
1977 | mask = &ohci->it_context_mask; |
1978 | list = ohci->it_context_list; | |
30200739 | 1979 | callback = handle_it_packet; |
ed568912 | 1980 | } else { |
4817ed24 | 1981 | channels = &ohci->ir_context_channels; |
373b2edd SR |
1982 | mask = &ohci->ir_context_mask; |
1983 | list = ohci->ir_context_list; | |
6498ba04 | 1984 | callback = handle_ir_packet_per_buffer; |
ed568912 KH |
1985 | } |
1986 | ||
1987 | spin_lock_irqsave(&ohci->lock, flags); | |
4817ed24 SR |
1988 | index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1; |
1989 | if (index >= 0) { | |
1990 | *channels &= ~(1ULL << channel); | |
ed568912 | 1991 | *mask &= ~(1 << index); |
4817ed24 | 1992 | } |
ed568912 KH |
1993 | spin_unlock_irqrestore(&ohci->lock, flags); |
1994 | ||
1995 | if (index < 0) | |
1996 | return ERR_PTR(-EBUSY); | |
1997 | ||
373b2edd SR |
1998 | if (type == FW_ISO_CONTEXT_TRANSMIT) |
1999 | regs = OHCI1394_IsoXmitContextBase(index); | |
2000 | else | |
2001 | regs = OHCI1394_IsoRcvContextBase(index); | |
2002 | ||
ed568912 | 2003 | ctx = &list[index]; |
2d826cc5 | 2004 | memset(ctx, 0, sizeof(*ctx)); |
9b32d5f3 KH |
2005 | ctx->header_length = 0; |
2006 | ctx->header = (void *) __get_free_page(GFP_KERNEL); | |
2007 | if (ctx->header == NULL) | |
2008 | goto out; | |
2009 | ||
2dbd7d7e SR |
2010 | ret = context_init(&ctx->context, ohci, regs, callback); |
2011 | if (ret < 0) | |
9b32d5f3 | 2012 | goto out_with_header; |
ed568912 KH |
2013 | |
2014 | return &ctx->base; | |
9b32d5f3 KH |
2015 | |
2016 | out_with_header: | |
2017 | free_page((unsigned long)ctx->header); | |
2018 | out: | |
2019 | spin_lock_irqsave(&ohci->lock, flags); | |
2020 | *mask |= 1 << index; | |
2021 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2022 | ||
2dbd7d7e | 2023 | return ERR_PTR(ret); |
ed568912 KH |
2024 | } |
2025 | ||
eb0306ea KH |
2026 | static int ohci_start_iso(struct fw_iso_context *base, |
2027 | s32 cycle, u32 sync, u32 tags) | |
ed568912 | 2028 | { |
373b2edd | 2029 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 2030 | struct fw_ohci *ohci = ctx->context.ohci; |
8a2f7d93 | 2031 | u32 control, match; |
ed568912 KH |
2032 | int index; |
2033 | ||
295e3feb KH |
2034 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { |
2035 | index = ctx - ohci->it_context_list; | |
8a2f7d93 KH |
2036 | match = 0; |
2037 | if (cycle >= 0) | |
2038 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | | |
295e3feb | 2039 | (cycle & 0x7fff) << 16; |
21efb3cf | 2040 | |
295e3feb KH |
2041 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
2042 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
8a2f7d93 | 2043 | context_run(&ctx->context, match); |
295e3feb KH |
2044 | } else { |
2045 | index = ctx - ohci->ir_context_list; | |
a186b4a6 | 2046 | control = IR_CONTEXT_ISOCH_HEADER; |
8a2f7d93 KH |
2047 | match = (tags << 28) | (sync << 8) | ctx->base.channel; |
2048 | if (cycle >= 0) { | |
2049 | match |= (cycle & 0x07fff) << 12; | |
2050 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; | |
2051 | } | |
ed568912 | 2052 | |
295e3feb KH |
2053 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
2054 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); | |
a77754a7 | 2055 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
8a2f7d93 | 2056 | context_run(&ctx->context, control); |
295e3feb | 2057 | } |
ed568912 KH |
2058 | |
2059 | return 0; | |
2060 | } | |
2061 | ||
b8295668 KH |
2062 | static int ohci_stop_iso(struct fw_iso_context *base) |
2063 | { | |
2064 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2065 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
b8295668 KH |
2066 | int index; |
2067 | ||
2068 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
2069 | index = ctx - ohci->it_context_list; | |
2070 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
2071 | } else { | |
2072 | index = ctx - ohci->ir_context_list; | |
2073 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
2074 | } | |
2075 | flush_writes(ohci); | |
2076 | context_stop(&ctx->context); | |
2077 | ||
2078 | return 0; | |
2079 | } | |
2080 | ||
ed568912 KH |
2081 | static void ohci_free_iso_context(struct fw_iso_context *base) |
2082 | { | |
2083 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2084 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
ed568912 KH |
2085 | unsigned long flags; |
2086 | int index; | |
2087 | ||
b8295668 KH |
2088 | ohci_stop_iso(base); |
2089 | context_release(&ctx->context); | |
9b32d5f3 | 2090 | free_page((unsigned long)ctx->header); |
b8295668 | 2091 | |
ed568912 KH |
2092 | spin_lock_irqsave(&ohci->lock, flags); |
2093 | ||
2094 | if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) { | |
2095 | index = ctx - ohci->it_context_list; | |
ed568912 KH |
2096 | ohci->it_context_mask |= 1 << index; |
2097 | } else { | |
2098 | index = ctx - ohci->ir_context_list; | |
ed568912 | 2099 | ohci->ir_context_mask |= 1 << index; |
4817ed24 | 2100 | ohci->ir_context_channels |= 1ULL << base->channel; |
ed568912 | 2101 | } |
ed568912 KH |
2102 | |
2103 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2104 | } | |
2105 | ||
53dca511 SR |
2106 | static int ohci_queue_iso_transmit(struct fw_iso_context *base, |
2107 | struct fw_iso_packet *packet, | |
2108 | struct fw_iso_buffer *buffer, | |
2109 | unsigned long payload) | |
ed568912 | 2110 | { |
373b2edd | 2111 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 2112 | struct descriptor *d, *last, *pd; |
ed568912 KH |
2113 | struct fw_iso_packet *p; |
2114 | __le32 *header; | |
9aad8125 | 2115 | dma_addr_t d_bus, page_bus; |
ed568912 KH |
2116 | u32 z, header_z, payload_z, irq; |
2117 | u32 payload_index, payload_end_index, next_page_index; | |
30200739 | 2118 | int page, end_page, i, length, offset; |
ed568912 | 2119 | |
ed568912 | 2120 | p = packet; |
9aad8125 | 2121 | payload_index = payload; |
ed568912 KH |
2122 | |
2123 | if (p->skip) | |
2124 | z = 1; | |
2125 | else | |
2126 | z = 2; | |
2127 | if (p->header_length > 0) | |
2128 | z++; | |
2129 | ||
2130 | /* Determine the first page the payload isn't contained in. */ | |
2131 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
2132 | if (p->payload_length > 0) | |
2133 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
2134 | else | |
2135 | payload_z = 0; | |
2136 | ||
2137 | z += payload_z; | |
2138 | ||
2139 | /* Get header size in number of descriptors. */ | |
2d826cc5 | 2140 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
ed568912 | 2141 | |
30200739 KH |
2142 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
2143 | if (d == NULL) | |
2144 | return -ENOMEM; | |
ed568912 KH |
2145 | |
2146 | if (!p->skip) { | |
a77754a7 | 2147 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
ed568912 | 2148 | d[0].req_count = cpu_to_le16(8); |
7f51a100 CL |
2149 | /* |
2150 | * Link the skip address to this descriptor itself. This causes | |
2151 | * a context to skip a cycle whenever lost cycles or FIFO | |
2152 | * overruns occur, without dropping the data. The application | |
2153 | * should then decide whether this is an error condition or not. | |
2154 | * FIXME: Make the context's cycle-lost behaviour configurable? | |
2155 | */ | |
2156 | d[0].branch_address = cpu_to_le32(d_bus | z); | |
ed568912 KH |
2157 | |
2158 | header = (__le32 *) &d[1]; | |
a77754a7 KH |
2159 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
2160 | IT_HEADER_TAG(p->tag) | | |
2161 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | | |
2162 | IT_HEADER_CHANNEL(ctx->base.channel) | | |
2163 | IT_HEADER_SPEED(ctx->base.speed)); | |
ed568912 | 2164 | header[1] = |
a77754a7 | 2165 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
ed568912 KH |
2166 | p->payload_length)); |
2167 | } | |
2168 | ||
2169 | if (p->header_length > 0) { | |
2170 | d[2].req_count = cpu_to_le16(p->header_length); | |
2d826cc5 | 2171 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
ed568912 KH |
2172 | memcpy(&d[z], p->header, p->header_length); |
2173 | } | |
2174 | ||
2175 | pd = d + z - payload_z; | |
2176 | payload_end_index = payload_index + p->payload_length; | |
2177 | for (i = 0; i < payload_z; i++) { | |
2178 | page = payload_index >> PAGE_SHIFT; | |
2179 | offset = payload_index & ~PAGE_MASK; | |
2180 | next_page_index = (page + 1) << PAGE_SHIFT; | |
2181 | length = | |
2182 | min(next_page_index, payload_end_index) - payload_index; | |
2183 | pd[i].req_count = cpu_to_le16(length); | |
9aad8125 KH |
2184 | |
2185 | page_bus = page_private(buffer->pages[page]); | |
2186 | pd[i].data_address = cpu_to_le32(page_bus + offset); | |
ed568912 KH |
2187 | |
2188 | payload_index += length; | |
2189 | } | |
2190 | ||
ed568912 | 2191 | if (p->interrupt) |
a77754a7 | 2192 | irq = DESCRIPTOR_IRQ_ALWAYS; |
ed568912 | 2193 | else |
a77754a7 | 2194 | irq = DESCRIPTOR_NO_IRQ; |
ed568912 | 2195 | |
30200739 | 2196 | last = z == 2 ? d : d + z - 1; |
a77754a7 KH |
2197 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
2198 | DESCRIPTOR_STATUS | | |
2199 | DESCRIPTOR_BRANCH_ALWAYS | | |
cbb59da7 | 2200 | irq); |
ed568912 | 2201 | |
30200739 | 2202 | context_append(&ctx->context, d, z, header_z); |
ed568912 KH |
2203 | |
2204 | return 0; | |
2205 | } | |
373b2edd | 2206 | |
53dca511 SR |
2207 | static int ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base, |
2208 | struct fw_iso_packet *packet, | |
2209 | struct fw_iso_buffer *buffer, | |
2210 | unsigned long payload) | |
a186b4a6 JW |
2211 | { |
2212 | struct iso_context *ctx = container_of(base, struct iso_context, base); | |
8c0c0cc2 | 2213 | struct descriptor *d, *pd; |
bcee893c | 2214 | struct fw_iso_packet *p = packet; |
a186b4a6 JW |
2215 | dma_addr_t d_bus, page_bus; |
2216 | u32 z, header_z, rest; | |
bcee893c DM |
2217 | int i, j, length; |
2218 | int page, offset, packet_count, header_size, payload_per_buffer; | |
a186b4a6 JW |
2219 | |
2220 | /* | |
1aa292bb DM |
2221 | * The OHCI controller puts the isochronous header and trailer in the |
2222 | * buffer, so we need at least 8 bytes. | |
a186b4a6 JW |
2223 | */ |
2224 | packet_count = p->header_length / ctx->base.header_size; | |
1aa292bb | 2225 | header_size = max(ctx->base.header_size, (size_t)8); |
a186b4a6 JW |
2226 | |
2227 | /* Get header size in number of descriptors. */ | |
2228 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); | |
2229 | page = payload >> PAGE_SHIFT; | |
2230 | offset = payload & ~PAGE_MASK; | |
bcee893c | 2231 | payload_per_buffer = p->payload_length / packet_count; |
a186b4a6 JW |
2232 | |
2233 | for (i = 0; i < packet_count; i++) { | |
2234 | /* d points to the header descriptor */ | |
bcee893c | 2235 | z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1; |
a186b4a6 | 2236 | d = context_get_descriptors(&ctx->context, |
bcee893c | 2237 | z + header_z, &d_bus); |
a186b4a6 JW |
2238 | if (d == NULL) |
2239 | return -ENOMEM; | |
2240 | ||
bcee893c DM |
2241 | d->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2242 | DESCRIPTOR_INPUT_MORE); | |
2243 | if (p->skip && i == 0) | |
2244 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
a186b4a6 JW |
2245 | d->req_count = cpu_to_le16(header_size); |
2246 | d->res_count = d->req_count; | |
bcee893c | 2247 | d->transfer_status = 0; |
a186b4a6 JW |
2248 | d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d))); |
2249 | ||
bcee893c | 2250 | rest = payload_per_buffer; |
8c0c0cc2 | 2251 | pd = d; |
bcee893c | 2252 | for (j = 1; j < z; j++) { |
8c0c0cc2 | 2253 | pd++; |
bcee893c DM |
2254 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2255 | DESCRIPTOR_INPUT_MORE); | |
2256 | ||
2257 | if (offset + rest < PAGE_SIZE) | |
2258 | length = rest; | |
2259 | else | |
2260 | length = PAGE_SIZE - offset; | |
2261 | pd->req_count = cpu_to_le16(length); | |
2262 | pd->res_count = pd->req_count; | |
2263 | pd->transfer_status = 0; | |
2264 | ||
2265 | page_bus = page_private(buffer->pages[page]); | |
2266 | pd->data_address = cpu_to_le32(page_bus + offset); | |
2267 | ||
2268 | offset = (offset + length) & ~PAGE_MASK; | |
2269 | rest -= length; | |
2270 | if (offset == 0) | |
2271 | page++; | |
2272 | } | |
a186b4a6 JW |
2273 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2274 | DESCRIPTOR_INPUT_LAST | | |
2275 | DESCRIPTOR_BRANCH_ALWAYS); | |
bcee893c | 2276 | if (p->interrupt && i == packet_count - 1) |
a186b4a6 JW |
2277 | pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
2278 | ||
a186b4a6 JW |
2279 | context_append(&ctx->context, d, z, header_z); |
2280 | } | |
2281 | ||
2282 | return 0; | |
2283 | } | |
2284 | ||
53dca511 SR |
2285 | static int ohci_queue_iso(struct fw_iso_context *base, |
2286 | struct fw_iso_packet *packet, | |
2287 | struct fw_iso_buffer *buffer, | |
2288 | unsigned long payload) | |
295e3feb | 2289 | { |
e364cf4e | 2290 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
fe5ca634 | 2291 | unsigned long flags; |
2dbd7d7e | 2292 | int ret; |
e364cf4e | 2293 | |
fe5ca634 | 2294 | spin_lock_irqsave(&ctx->context.ohci->lock, flags); |
295e3feb | 2295 | if (base->type == FW_ISO_CONTEXT_TRANSMIT) |
2dbd7d7e | 2296 | ret = ohci_queue_iso_transmit(base, packet, buffer, payload); |
e364cf4e | 2297 | else |
2dbd7d7e SR |
2298 | ret = ohci_queue_iso_receive_packet_per_buffer(base, packet, |
2299 | buffer, payload); | |
fe5ca634 DM |
2300 | spin_unlock_irqrestore(&ctx->context.ohci->lock, flags); |
2301 | ||
2dbd7d7e | 2302 | return ret; |
295e3feb KH |
2303 | } |
2304 | ||
21ebcd12 | 2305 | static const struct fw_card_driver ohci_driver = { |
ed568912 KH |
2306 | .enable = ohci_enable, |
2307 | .update_phy_reg = ohci_update_phy_reg, | |
2308 | .set_config_rom = ohci_set_config_rom, | |
2309 | .send_request = ohci_send_request, | |
2310 | .send_response = ohci_send_response, | |
730c32f5 | 2311 | .cancel_packet = ohci_cancel_packet, |
ed568912 | 2312 | .enable_phys_dma = ohci_enable_phys_dma, |
168cf9af | 2313 | .get_cycle_time = ohci_get_cycle_time, |
ed568912 KH |
2314 | |
2315 | .allocate_iso_context = ohci_allocate_iso_context, | |
2316 | .free_iso_context = ohci_free_iso_context, | |
2317 | .queue_iso = ohci_queue_iso, | |
69cdb726 | 2318 | .start_iso = ohci_start_iso, |
b8295668 | 2319 | .stop_iso = ohci_stop_iso, |
ed568912 KH |
2320 | }; |
2321 | ||
ea8d006b | 2322 | #ifdef CONFIG_PPC_PMAC |
2ed0f181 SR |
2323 | static void ohci_pmac_on(struct pci_dev *dev) |
2324 | { | |
ea8d006b SR |
2325 | if (machine_is(powermac)) { |
2326 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2327 | ||
2328 | if (ofn) { | |
2329 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); | |
2330 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
2331 | } | |
2332 | } | |
2ed0f181 SR |
2333 | } |
2334 | ||
2335 | static void ohci_pmac_off(struct pci_dev *dev) | |
2336 | { | |
2337 | if (machine_is(powermac)) { | |
2338 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2339 | ||
2340 | if (ofn) { | |
2341 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
2342 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); | |
2343 | } | |
2344 | } | |
2345 | } | |
2346 | #else | |
2347 | #define ohci_pmac_on(dev) | |
2348 | #define ohci_pmac_off(dev) | |
ea8d006b SR |
2349 | #endif /* CONFIG_PPC_PMAC */ |
2350 | ||
53dca511 SR |
2351 | static int __devinit pci_probe(struct pci_dev *dev, |
2352 | const struct pci_device_id *ent) | |
2ed0f181 SR |
2353 | { |
2354 | struct fw_ohci *ohci; | |
95984f62 | 2355 | u32 bus_options, max_receive, link_speed, version; |
2ed0f181 | 2356 | u64 guid; |
6fdb2ee2 | 2357 | int i, err, n_ir, n_it; |
2ed0f181 SR |
2358 | size_t size; |
2359 | ||
2d826cc5 | 2360 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
ed568912 | 2361 | if (ohci == NULL) { |
7007a076 SR |
2362 | err = -ENOMEM; |
2363 | goto fail; | |
ed568912 KH |
2364 | } |
2365 | ||
2366 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
2367 | ||
130d5496 SR |
2368 | ohci_pmac_on(dev); |
2369 | ||
d79406dd KH |
2370 | err = pci_enable_device(dev); |
2371 | if (err) { | |
7007a076 | 2372 | fw_error("Failed to enable OHCI hardware\n"); |
bd7dee63 | 2373 | goto fail_free; |
ed568912 KH |
2374 | } |
2375 | ||
2376 | pci_set_master(dev); | |
2377 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
2378 | pci_set_drvdata(dev, ohci); | |
2379 | ||
2380 | spin_lock_init(&ohci->lock); | |
2381 | ||
2382 | tasklet_init(&ohci->bus_reset_tasklet, | |
2383 | bus_reset_tasklet, (unsigned long)ohci); | |
2384 | ||
d79406dd KH |
2385 | err = pci_request_region(dev, 0, ohci_driver_name); |
2386 | if (err) { | |
ed568912 | 2387 | fw_error("MMIO resource unavailable\n"); |
d79406dd | 2388 | goto fail_disable; |
ed568912 KH |
2389 | } |
2390 | ||
2391 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
2392 | if (ohci->registers == NULL) { | |
2393 | fw_error("Failed to remap registers\n"); | |
d79406dd KH |
2394 | err = -ENXIO; |
2395 | goto fail_iomem; | |
ed568912 KH |
2396 | } |
2397 | ||
4a635593 SR |
2398 | for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++) |
2399 | if (ohci_quirks[i].vendor == dev->vendor && | |
2400 | (ohci_quirks[i].device == dev->device || | |
2401 | ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) { | |
2402 | ohci->quirks = ohci_quirks[i].flags; | |
2403 | break; | |
2404 | } | |
3e9cc2f3 SR |
2405 | if (param_quirks) |
2406 | ohci->quirks = param_quirks; | |
b677532b | 2407 | |
ed568912 KH |
2408 | ar_context_init(&ohci->ar_request_ctx, ohci, |
2409 | OHCI1394_AsReqRcvContextControlSet); | |
2410 | ||
2411 | ar_context_init(&ohci->ar_response_ctx, ohci, | |
2412 | OHCI1394_AsRspRcvContextControlSet); | |
2413 | ||
fe5ca634 | 2414 | context_init(&ohci->at_request_ctx, ohci, |
f319b6a0 | 2415 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); |
ed568912 | 2416 | |
fe5ca634 | 2417 | context_init(&ohci->at_response_ctx, ohci, |
f319b6a0 | 2418 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); |
ed568912 | 2419 | |
ed568912 | 2420 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
4802f16d SR |
2421 | ohci->ir_context_channels = ~0ULL; |
2422 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); | |
ed568912 | 2423 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); |
6fdb2ee2 SR |
2424 | n_ir = hweight32(ohci->ir_context_mask); |
2425 | size = sizeof(struct iso_context) * n_ir; | |
4802f16d | 2426 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
2427 | |
2428 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
4802f16d | 2429 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); |
ed568912 | 2430 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); |
6fdb2ee2 SR |
2431 | n_it = hweight32(ohci->it_context_mask); |
2432 | size = sizeof(struct iso_context) * n_it; | |
4802f16d | 2433 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
2434 | |
2435 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
d79406dd | 2436 | err = -ENOMEM; |
7007a076 | 2437 | goto fail_contexts; |
ed568912 KH |
2438 | } |
2439 | ||
2440 | /* self-id dma buffer allocation */ | |
2441 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, | |
2442 | SELF_ID_BUF_SIZE, | |
2443 | &ohci->self_id_bus, | |
2444 | GFP_KERNEL); | |
2445 | if (ohci->self_id_cpu == NULL) { | |
d79406dd | 2446 | err = -ENOMEM; |
7007a076 | 2447 | goto fail_contexts; |
ed568912 KH |
2448 | } |
2449 | ||
ed568912 KH |
2450 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
2451 | max_receive = (bus_options >> 12) & 0xf; | |
2452 | link_speed = bus_options & 0x7; | |
2453 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
2454 | reg_read(ohci, OHCI1394_GUIDLo); | |
2455 | ||
d79406dd | 2456 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
e1eff7a3 | 2457 | if (err) |
d79406dd | 2458 | goto fail_self_id; |
ed568912 | 2459 | |
6fdb2ee2 SR |
2460 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
2461 | fw_notify("Added fw-ohci device %s, OHCI v%x.%x, " | |
2462 | "%d IR + %d IT contexts, quirks 0x%x\n", | |
2463 | dev_name(&dev->dev), version >> 16, version & 0xff, | |
2464 | n_ir, n_it, ohci->quirks); | |
e1eff7a3 | 2465 | |
ed568912 | 2466 | return 0; |
d79406dd KH |
2467 | |
2468 | fail_self_id: | |
2469 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, | |
2470 | ohci->self_id_cpu, ohci->self_id_bus); | |
7007a076 | 2471 | fail_contexts: |
d79406dd | 2472 | kfree(ohci->ir_context_list); |
7007a076 SR |
2473 | kfree(ohci->it_context_list); |
2474 | context_release(&ohci->at_response_ctx); | |
2475 | context_release(&ohci->at_request_ctx); | |
2476 | ar_context_release(&ohci->ar_response_ctx); | |
2477 | ar_context_release(&ohci->ar_request_ctx); | |
d79406dd KH |
2478 | pci_iounmap(dev, ohci->registers); |
2479 | fail_iomem: | |
2480 | pci_release_region(dev, 0); | |
2481 | fail_disable: | |
2482 | pci_disable_device(dev); | |
bd7dee63 SR |
2483 | fail_free: |
2484 | kfree(&ohci->card); | |
130d5496 | 2485 | ohci_pmac_off(dev); |
7007a076 SR |
2486 | fail: |
2487 | if (err == -ENOMEM) | |
2488 | fw_error("Out of memory\n"); | |
d79406dd KH |
2489 | |
2490 | return err; | |
ed568912 KH |
2491 | } |
2492 | ||
2493 | static void pci_remove(struct pci_dev *dev) | |
2494 | { | |
2495 | struct fw_ohci *ohci; | |
2496 | ||
2497 | ohci = pci_get_drvdata(dev); | |
e254a4b4 KH |
2498 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
2499 | flush_writes(ohci); | |
ed568912 KH |
2500 | fw_core_remove_card(&ohci->card); |
2501 | ||
c781c06d KH |
2502 | /* |
2503 | * FIXME: Fail all pending packets here, now that the upper | |
2504 | * layers can't queue any more. | |
2505 | */ | |
ed568912 KH |
2506 | |
2507 | software_reset(ohci); | |
2508 | free_irq(dev->irq, ohci); | |
a55709ba JF |
2509 | |
2510 | if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom) | |
2511 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2512 | ohci->next_config_rom, ohci->next_config_rom_bus); | |
2513 | if (ohci->config_rom) | |
2514 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2515 | ohci->config_rom, ohci->config_rom_bus); | |
d79406dd KH |
2516 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
2517 | ohci->self_id_cpu, ohci->self_id_bus); | |
a55709ba JF |
2518 | ar_context_release(&ohci->ar_request_ctx); |
2519 | ar_context_release(&ohci->ar_response_ctx); | |
2520 | context_release(&ohci->at_request_ctx); | |
2521 | context_release(&ohci->at_response_ctx); | |
d79406dd KH |
2522 | kfree(ohci->it_context_list); |
2523 | kfree(ohci->ir_context_list); | |
2524 | pci_iounmap(dev, ohci->registers); | |
2525 | pci_release_region(dev, 0); | |
2526 | pci_disable_device(dev); | |
bd7dee63 | 2527 | kfree(&ohci->card); |
2ed0f181 | 2528 | ohci_pmac_off(dev); |
ea8d006b | 2529 | |
ed568912 KH |
2530 | fw_notify("Removed fw-ohci device.\n"); |
2531 | } | |
2532 | ||
2aef469a | 2533 | #ifdef CONFIG_PM |
2ed0f181 | 2534 | static int pci_suspend(struct pci_dev *dev, pm_message_t state) |
2aef469a | 2535 | { |
2ed0f181 | 2536 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
2537 | int err; |
2538 | ||
2539 | software_reset(ohci); | |
2ed0f181 SR |
2540 | free_irq(dev->irq, ohci); |
2541 | err = pci_save_state(dev); | |
2aef469a | 2542 | if (err) { |
8a8cea27 | 2543 | fw_error("pci_save_state failed\n"); |
2aef469a KH |
2544 | return err; |
2545 | } | |
2ed0f181 | 2546 | err = pci_set_power_state(dev, pci_choose_state(dev, state)); |
55111428 SR |
2547 | if (err) |
2548 | fw_error("pci_set_power_state failed with %d\n", err); | |
2ed0f181 | 2549 | ohci_pmac_off(dev); |
ea8d006b | 2550 | |
2aef469a KH |
2551 | return 0; |
2552 | } | |
2553 | ||
2ed0f181 | 2554 | static int pci_resume(struct pci_dev *dev) |
2aef469a | 2555 | { |
2ed0f181 | 2556 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
2557 | int err; |
2558 | ||
2ed0f181 SR |
2559 | ohci_pmac_on(dev); |
2560 | pci_set_power_state(dev, PCI_D0); | |
2561 | pci_restore_state(dev); | |
2562 | err = pci_enable_device(dev); | |
2aef469a | 2563 | if (err) { |
8a8cea27 | 2564 | fw_error("pci_enable_device failed\n"); |
2aef469a KH |
2565 | return err; |
2566 | } | |
2567 | ||
0bd243c4 | 2568 | return ohci_enable(&ohci->card, NULL, 0); |
2aef469a KH |
2569 | } |
2570 | #endif | |
2571 | ||
a67483d2 | 2572 | static const struct pci_device_id pci_table[] = { |
ed568912 KH |
2573 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, |
2574 | { } | |
2575 | }; | |
2576 | ||
2577 | MODULE_DEVICE_TABLE(pci, pci_table); | |
2578 | ||
2579 | static struct pci_driver fw_ohci_pci_driver = { | |
2580 | .name = ohci_driver_name, | |
2581 | .id_table = pci_table, | |
2582 | .probe = pci_probe, | |
2583 | .remove = pci_remove, | |
2aef469a KH |
2584 | #ifdef CONFIG_PM |
2585 | .resume = pci_resume, | |
2586 | .suspend = pci_suspend, | |
2587 | #endif | |
ed568912 KH |
2588 | }; |
2589 | ||
2590 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
2591 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
2592 | MODULE_LICENSE("GPL"); | |
2593 | ||
1e4c7b0d OH |
2594 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
2595 | #ifndef CONFIG_IEEE1394_OHCI1394_MODULE | |
2596 | MODULE_ALIAS("ohci1394"); | |
2597 | #endif | |
2598 | ||
ed568912 KH |
2599 | static int __init fw_ohci_init(void) |
2600 | { | |
2601 | return pci_register_driver(&fw_ohci_pci_driver); | |
2602 | } | |
2603 | ||
2604 | static void __exit fw_ohci_cleanup(void) | |
2605 | { | |
2606 | pci_unregister_driver(&fw_ohci_pci_driver); | |
2607 | } | |
2608 | ||
2609 | module_init(fw_ohci_init); | |
2610 | module_exit(fw_ohci_cleanup); |