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 | ||
65b2742a | 21 | #include <linux/bug.h> |
e524f616 | 22 | #include <linux/compiler.h> |
ed568912 | 23 | #include <linux/delay.h> |
e8ca9702 | 24 | #include <linux/device.h> |
cf3e72fd | 25 | #include <linux/dma-mapping.h> |
77c9a5da | 26 | #include <linux/firewire.h> |
e8ca9702 | 27 | #include <linux/firewire-constants.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> |
02d37bed | 36 | #include <linux/mutex.h> |
a7fb60db | 37 | #include <linux/pci.h> |
fc383796 | 38 | #include <linux/pci_ids.h> |
5a0e3ad6 | 39 | #include <linux/slab.h> |
c26f0234 | 40 | #include <linux/spinlock.h> |
e8ca9702 | 41 | #include <linux/string.h> |
e78483c5 | 42 | #include <linux/time.h> |
cf3e72fd | 43 | |
e8ca9702 | 44 | #include <asm/byteorder.h> |
c26f0234 | 45 | #include <asm/page.h> |
ee71c2f9 | 46 | #include <asm/system.h> |
ed568912 | 47 | |
ea8d006b SR |
48 | #ifdef CONFIG_PPC_PMAC |
49 | #include <asm/pmac_feature.h> | |
50 | #endif | |
51 | ||
77c9a5da SR |
52 | #include "core.h" |
53 | #include "ohci.h" | |
ed568912 | 54 | |
a77754a7 KH |
55 | #define DESCRIPTOR_OUTPUT_MORE 0 |
56 | #define DESCRIPTOR_OUTPUT_LAST (1 << 12) | |
57 | #define DESCRIPTOR_INPUT_MORE (2 << 12) | |
58 | #define DESCRIPTOR_INPUT_LAST (3 << 12) | |
59 | #define DESCRIPTOR_STATUS (1 << 11) | |
60 | #define DESCRIPTOR_KEY_IMMEDIATE (2 << 8) | |
61 | #define DESCRIPTOR_PING (1 << 7) | |
62 | #define DESCRIPTOR_YY (1 << 6) | |
63 | #define DESCRIPTOR_NO_IRQ (0 << 4) | |
64 | #define DESCRIPTOR_IRQ_ERROR (1 << 4) | |
65 | #define DESCRIPTOR_IRQ_ALWAYS (3 << 4) | |
66 | #define DESCRIPTOR_BRANCH_ALWAYS (3 << 2) | |
67 | #define DESCRIPTOR_WAIT (3 << 0) | |
ed568912 KH |
68 | |
69 | struct descriptor { | |
70 | __le16 req_count; | |
71 | __le16 control; | |
72 | __le32 data_address; | |
73 | __le32 branch_address; | |
74 | __le16 res_count; | |
75 | __le16 transfer_status; | |
76 | } __attribute__((aligned(16))); | |
77 | ||
a77754a7 KH |
78 | #define CONTROL_SET(regs) (regs) |
79 | #define CONTROL_CLEAR(regs) ((regs) + 4) | |
80 | #define COMMAND_PTR(regs) ((regs) + 12) | |
81 | #define CONTEXT_MATCH(regs) ((regs) + 16) | |
72e318e0 | 82 | |
32b46093 | 83 | struct ar_buffer { |
ed568912 | 84 | struct descriptor descriptor; |
32b46093 KH |
85 | struct ar_buffer *next; |
86 | __le32 data[0]; | |
87 | }; | |
ed568912 | 88 | |
32b46093 KH |
89 | struct ar_context { |
90 | struct fw_ohci *ohci; | |
91 | struct ar_buffer *current_buffer; | |
92 | struct ar_buffer *last_buffer; | |
93 | void *pointer; | |
72e318e0 | 94 | u32 regs; |
ed568912 KH |
95 | struct tasklet_struct tasklet; |
96 | }; | |
97 | ||
30200739 KH |
98 | struct context; |
99 | ||
100 | typedef int (*descriptor_callback_t)(struct context *ctx, | |
101 | struct descriptor *d, | |
102 | struct descriptor *last); | |
fe5ca634 DM |
103 | |
104 | /* | |
105 | * A buffer that contains a block of DMA-able coherent memory used for | |
106 | * storing a portion of a DMA descriptor program. | |
107 | */ | |
108 | struct descriptor_buffer { | |
109 | struct list_head list; | |
110 | dma_addr_t buffer_bus; | |
111 | size_t buffer_size; | |
112 | size_t used; | |
113 | struct descriptor buffer[0]; | |
114 | }; | |
115 | ||
30200739 | 116 | struct context { |
373b2edd | 117 | struct fw_ohci *ohci; |
30200739 | 118 | u32 regs; |
fe5ca634 | 119 | int total_allocation; |
373b2edd | 120 | |
fe5ca634 DM |
121 | /* |
122 | * List of page-sized buffers for storing DMA descriptors. | |
123 | * Head of list contains buffers in use and tail of list contains | |
124 | * free buffers. | |
125 | */ | |
126 | struct list_head buffer_list; | |
127 | ||
128 | /* | |
129 | * Pointer to a buffer inside buffer_list that contains the tail | |
130 | * end of the current DMA program. | |
131 | */ | |
132 | struct descriptor_buffer *buffer_tail; | |
133 | ||
134 | /* | |
135 | * The descriptor containing the branch address of the first | |
136 | * descriptor that has not yet been filled by the device. | |
137 | */ | |
138 | struct descriptor *last; | |
139 | ||
140 | /* | |
141 | * The last descriptor in the DMA program. It contains the branch | |
142 | * address that must be updated upon appending a new descriptor. | |
143 | */ | |
144 | struct descriptor *prev; | |
30200739 KH |
145 | |
146 | descriptor_callback_t callback; | |
147 | ||
373b2edd | 148 | struct tasklet_struct tasklet; |
30200739 | 149 | }; |
30200739 | 150 | |
a77754a7 KH |
151 | #define IT_HEADER_SY(v) ((v) << 0) |
152 | #define IT_HEADER_TCODE(v) ((v) << 4) | |
153 | #define IT_HEADER_CHANNEL(v) ((v) << 8) | |
154 | #define IT_HEADER_TAG(v) ((v) << 14) | |
155 | #define IT_HEADER_SPEED(v) ((v) << 16) | |
156 | #define IT_HEADER_DATA_LENGTH(v) ((v) << 16) | |
ed568912 KH |
157 | |
158 | struct iso_context { | |
159 | struct fw_iso_context base; | |
30200739 | 160 | struct context context; |
0642b657 | 161 | int excess_bytes; |
9b32d5f3 KH |
162 | void *header; |
163 | size_t header_length; | |
ed568912 KH |
164 | }; |
165 | ||
166 | #define CONFIG_ROM_SIZE 1024 | |
167 | ||
168 | struct fw_ohci { | |
169 | struct fw_card card; | |
170 | ||
171 | __iomem char *registers; | |
e636fe25 | 172 | int node_id; |
ed568912 | 173 | int generation; |
e09770db | 174 | int request_generation; /* for timestamping incoming requests */ |
4a635593 | 175 | unsigned quirks; |
a1a1132b | 176 | unsigned int pri_req_max; |
a48777e0 | 177 | u32 bus_time; |
4ffb7a6a | 178 | bool is_root; |
c8a94ded | 179 | bool csr_state_setclear_abdicate; |
ed568912 | 180 | |
c781c06d KH |
181 | /* |
182 | * Spinlock for accessing fw_ohci data. Never call out of | |
183 | * this driver with this lock held. | |
184 | */ | |
ed568912 | 185 | spinlock_t lock; |
ed568912 | 186 | |
02d37bed SR |
187 | struct mutex phy_reg_mutex; |
188 | ||
ed568912 KH |
189 | struct ar_context ar_request_ctx; |
190 | struct ar_context ar_response_ctx; | |
f319b6a0 KH |
191 | struct context at_request_ctx; |
192 | struct context at_response_ctx; | |
ed568912 | 193 | |
872e330e | 194 | u32 it_context_mask; /* unoccupied IT contexts */ |
ed568912 | 195 | struct iso_context *it_context_list; |
872e330e SR |
196 | u64 ir_context_channels; /* unoccupied channels */ |
197 | u32 ir_context_mask; /* unoccupied IR contexts */ | |
ed568912 | 198 | struct iso_context *ir_context_list; |
872e330e SR |
199 | u64 mc_channels; /* channels in use by the multichannel IR context */ |
200 | bool mc_allocated; | |
ecb1cf9c SR |
201 | |
202 | __be32 *config_rom; | |
203 | dma_addr_t config_rom_bus; | |
204 | __be32 *next_config_rom; | |
205 | dma_addr_t next_config_rom_bus; | |
206 | __be32 next_header; | |
207 | ||
208 | __le32 *self_id_cpu; | |
209 | dma_addr_t self_id_bus; | |
210 | struct tasklet_struct bus_reset_tasklet; | |
211 | ||
212 | u32 self_id_buffer[512]; | |
ed568912 KH |
213 | }; |
214 | ||
95688e97 | 215 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
ed568912 KH |
216 | { |
217 | return container_of(card, struct fw_ohci, card); | |
218 | } | |
219 | ||
295e3feb KH |
220 | #define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 |
221 | #define IR_CONTEXT_BUFFER_FILL 0x80000000 | |
222 | #define IR_CONTEXT_ISOCH_HEADER 0x40000000 | |
223 | #define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000 | |
224 | #define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000 | |
225 | #define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000 | |
ed568912 KH |
226 | |
227 | #define CONTEXT_RUN 0x8000 | |
228 | #define CONTEXT_WAKE 0x1000 | |
229 | #define CONTEXT_DEAD 0x0800 | |
230 | #define CONTEXT_ACTIVE 0x0400 | |
231 | ||
8b7b6afa | 232 | #define OHCI1394_MAX_AT_REQ_RETRIES 0xf |
ed568912 KH |
233 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 |
234 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 | |
235 | ||
ed568912 KH |
236 | #define OHCI1394_REGISTER_SIZE 0x800 |
237 | #define OHCI_LOOP_COUNT 500 | |
238 | #define OHCI1394_PCI_HCI_Control 0x40 | |
239 | #define SELF_ID_BUF_SIZE 0x800 | |
32b46093 | 240 | #define OHCI_TCODE_PHY_PACKET 0x0e |
e364cf4e | 241 | #define OHCI_VERSION_1_1 0x010010 |
0edeefd9 | 242 | |
ed568912 KH |
243 | static char ohci_driver_name[] = KBUILD_MODNAME; |
244 | ||
262444ee | 245 | #define PCI_DEVICE_ID_JMICRON_JMB38X_FW 0x2380 |
8301b91b CL |
246 | #define PCI_DEVICE_ID_TI_TSB12LV22 0x8009 |
247 | ||
4a635593 SR |
248 | #define QUIRK_CYCLE_TIMER 1 |
249 | #define QUIRK_RESET_PACKET 2 | |
250 | #define QUIRK_BE_HEADERS 4 | |
925e7a65 | 251 | #define QUIRK_NO_1394A 8 |
262444ee | 252 | #define QUIRK_NO_MSI 16 |
4a635593 SR |
253 | |
254 | /* In case of multiple matches in ohci_quirks[], only the first one is used. */ | |
255 | static const struct { | |
256 | unsigned short vendor, device, flags; | |
257 | } ohci_quirks[] = { | |
8301b91b | 258 | {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV22, QUIRK_CYCLE_TIMER | |
925e7a65 CL |
259 | QUIRK_RESET_PACKET | |
260 | QUIRK_NO_1394A}, | |
4a635593 SR |
261 | {PCI_VENDOR_ID_TI, PCI_ANY_ID, QUIRK_RESET_PACKET}, |
262 | {PCI_VENDOR_ID_AL, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, | |
262444ee | 263 | {PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_FW, QUIRK_NO_MSI}, |
4a635593 SR |
264 | {PCI_VENDOR_ID_NEC, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, |
265 | {PCI_VENDOR_ID_VIA, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, | |
970f4be8 | 266 | {PCI_VENDOR_ID_RICOH, PCI_ANY_ID, QUIRK_CYCLE_TIMER}, |
4a635593 SR |
267 | {PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS}, |
268 | }; | |
269 | ||
3e9cc2f3 SR |
270 | /* This overrides anything that was found in ohci_quirks[]. */ |
271 | static int param_quirks; | |
272 | module_param_named(quirks, param_quirks, int, 0644); | |
273 | MODULE_PARM_DESC(quirks, "Chip quirks (default = 0" | |
274 | ", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER) | |
275 | ", reset packet generation = " __stringify(QUIRK_RESET_PACKET) | |
276 | ", AR/selfID endianess = " __stringify(QUIRK_BE_HEADERS) | |
925e7a65 | 277 | ", no 1394a enhancements = " __stringify(QUIRK_NO_1394A) |
262444ee | 278 | ", disable MSI = " __stringify(QUIRK_NO_MSI) |
3e9cc2f3 SR |
279 | ")"); |
280 | ||
a007bb85 | 281 | #define OHCI_PARAM_DEBUG_AT_AR 1 |
ad3c0fe8 | 282 | #define OHCI_PARAM_DEBUG_SELFIDS 2 |
a007bb85 SR |
283 | #define OHCI_PARAM_DEBUG_IRQS 4 |
284 | #define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */ | |
ad3c0fe8 | 285 | |
5da3dac8 SR |
286 | #ifdef CONFIG_FIREWIRE_OHCI_DEBUG |
287 | ||
ad3c0fe8 SR |
288 | static int param_debug; |
289 | module_param_named(debug, param_debug, int, 0644); | |
290 | MODULE_PARM_DESC(debug, "Verbose logging (default = 0" | |
ad3c0fe8 | 291 | ", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR) |
a007bb85 SR |
292 | ", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS) |
293 | ", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS) | |
294 | ", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS) | |
ad3c0fe8 SR |
295 | ", or a combination, or all = -1)"); |
296 | ||
297 | static void log_irqs(u32 evt) | |
298 | { | |
a007bb85 SR |
299 | if (likely(!(param_debug & |
300 | (OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS)))) | |
301 | return; | |
302 | ||
303 | if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) && | |
304 | !(evt & OHCI1394_busReset)) | |
ad3c0fe8 SR |
305 | return; |
306 | ||
a48777e0 | 307 | fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt, |
161b96e7 SR |
308 | evt & OHCI1394_selfIDComplete ? " selfID" : "", |
309 | evt & OHCI1394_RQPkt ? " AR_req" : "", | |
310 | evt & OHCI1394_RSPkt ? " AR_resp" : "", | |
311 | evt & OHCI1394_reqTxComplete ? " AT_req" : "", | |
312 | evt & OHCI1394_respTxComplete ? " AT_resp" : "", | |
313 | evt & OHCI1394_isochRx ? " IR" : "", | |
314 | evt & OHCI1394_isochTx ? " IT" : "", | |
315 | evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "", | |
316 | evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "", | |
a48777e0 | 317 | evt & OHCI1394_cycle64Seconds ? " cycle64Seconds" : "", |
5ed1f321 | 318 | evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "", |
161b96e7 SR |
319 | evt & OHCI1394_regAccessFail ? " regAccessFail" : "", |
320 | evt & OHCI1394_busReset ? " busReset" : "", | |
321 | evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt | | |
322 | OHCI1394_RSPkt | OHCI1394_reqTxComplete | | |
323 | OHCI1394_respTxComplete | OHCI1394_isochRx | | |
324 | OHCI1394_isochTx | OHCI1394_postedWriteErr | | |
a48777e0 CL |
325 | OHCI1394_cycleTooLong | OHCI1394_cycle64Seconds | |
326 | OHCI1394_cycleInconsistent | | |
161b96e7 | 327 | OHCI1394_regAccessFail | OHCI1394_busReset) |
ad3c0fe8 SR |
328 | ? " ?" : ""); |
329 | } | |
330 | ||
331 | static const char *speed[] = { | |
332 | [0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta", | |
333 | }; | |
334 | static const char *power[] = { | |
335 | [0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W", | |
336 | [4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W", | |
337 | }; | |
338 | static const char port[] = { '.', '-', 'p', 'c', }; | |
339 | ||
340 | static char _p(u32 *s, int shift) | |
341 | { | |
342 | return port[*s >> shift & 3]; | |
343 | } | |
344 | ||
08ddb2f4 | 345 | static void log_selfids(int node_id, int generation, int self_id_count, u32 *s) |
ad3c0fe8 SR |
346 | { |
347 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS))) | |
348 | return; | |
349 | ||
161b96e7 SR |
350 | fw_notify("%d selfIDs, generation %d, local node ID %04x\n", |
351 | self_id_count, generation, node_id); | |
ad3c0fe8 SR |
352 | |
353 | for (; self_id_count--; ++s) | |
354 | if ((*s & 1 << 23) == 0) | |
161b96e7 SR |
355 | fw_notify("selfID 0: %08x, phy %d [%c%c%c] " |
356 | "%s gc=%d %s %s%s%s\n", | |
357 | *s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2), | |
358 | speed[*s >> 14 & 3], *s >> 16 & 63, | |
359 | power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "", | |
360 | *s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : ""); | |
ad3c0fe8 | 361 | else |
161b96e7 SR |
362 | fw_notify("selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n", |
363 | *s, *s >> 24 & 63, | |
364 | _p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10), | |
365 | _p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2)); | |
ad3c0fe8 SR |
366 | } |
367 | ||
368 | static const char *evts[] = { | |
369 | [0x00] = "evt_no_status", [0x01] = "-reserved-", | |
370 | [0x02] = "evt_long_packet", [0x03] = "evt_missing_ack", | |
371 | [0x04] = "evt_underrun", [0x05] = "evt_overrun", | |
372 | [0x06] = "evt_descriptor_read", [0x07] = "evt_data_read", | |
373 | [0x08] = "evt_data_write", [0x09] = "evt_bus_reset", | |
374 | [0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err", | |
375 | [0x0c] = "-reserved-", [0x0d] = "-reserved-", | |
376 | [0x0e] = "evt_unknown", [0x0f] = "evt_flushed", | |
377 | [0x10] = "-reserved-", [0x11] = "ack_complete", | |
378 | [0x12] = "ack_pending ", [0x13] = "-reserved-", | |
379 | [0x14] = "ack_busy_X", [0x15] = "ack_busy_A", | |
380 | [0x16] = "ack_busy_B", [0x17] = "-reserved-", | |
381 | [0x18] = "-reserved-", [0x19] = "-reserved-", | |
382 | [0x1a] = "-reserved-", [0x1b] = "ack_tardy", | |
383 | [0x1c] = "-reserved-", [0x1d] = "ack_data_error", | |
384 | [0x1e] = "ack_type_error", [0x1f] = "-reserved-", | |
385 | [0x20] = "pending/cancelled", | |
386 | }; | |
387 | static const char *tcodes[] = { | |
388 | [0x0] = "QW req", [0x1] = "BW req", | |
389 | [0x2] = "W resp", [0x3] = "-reserved-", | |
390 | [0x4] = "QR req", [0x5] = "BR req", | |
391 | [0x6] = "QR resp", [0x7] = "BR resp", | |
392 | [0x8] = "cycle start", [0x9] = "Lk req", | |
393 | [0xa] = "async stream packet", [0xb] = "Lk resp", | |
394 | [0xc] = "-reserved-", [0xd] = "-reserved-", | |
395 | [0xe] = "link internal", [0xf] = "-reserved-", | |
396 | }; | |
397 | static const char *phys[] = { | |
398 | [0x0] = "phy config packet", [0x1] = "link-on packet", | |
399 | [0x2] = "self-id packet", [0x3] = "-reserved-", | |
400 | }; | |
401 | ||
402 | static void log_ar_at_event(char dir, int speed, u32 *header, int evt) | |
403 | { | |
404 | int tcode = header[0] >> 4 & 0xf; | |
405 | char specific[12]; | |
406 | ||
407 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR))) | |
408 | return; | |
409 | ||
410 | if (unlikely(evt >= ARRAY_SIZE(evts))) | |
411 | evt = 0x1f; | |
412 | ||
08ddb2f4 | 413 | if (evt == OHCI1394_evt_bus_reset) { |
161b96e7 SR |
414 | fw_notify("A%c evt_bus_reset, generation %d\n", |
415 | dir, (header[2] >> 16) & 0xff); | |
08ddb2f4 SR |
416 | return; |
417 | } | |
418 | ||
ad3c0fe8 | 419 | if (header[0] == ~header[1]) { |
161b96e7 SR |
420 | fw_notify("A%c %s, %s, %08x\n", |
421 | dir, evts[evt], phys[header[0] >> 30 & 0x3], header[0]); | |
ad3c0fe8 SR |
422 | return; |
423 | } | |
424 | ||
425 | switch (tcode) { | |
426 | case 0x0: case 0x6: case 0x8: | |
427 | snprintf(specific, sizeof(specific), " = %08x", | |
428 | be32_to_cpu((__force __be32)header[3])); | |
429 | break; | |
430 | case 0x1: case 0x5: case 0x7: case 0x9: case 0xb: | |
431 | snprintf(specific, sizeof(specific), " %x,%x", | |
432 | header[3] >> 16, header[3] & 0xffff); | |
433 | break; | |
434 | default: | |
435 | specific[0] = '\0'; | |
436 | } | |
437 | ||
438 | switch (tcode) { | |
439 | case 0xe: case 0xa: | |
161b96e7 | 440 | fw_notify("A%c %s, %s\n", dir, evts[evt], tcodes[tcode]); |
ad3c0fe8 SR |
441 | break; |
442 | case 0x0: case 0x1: case 0x4: case 0x5: case 0x9: | |
161b96e7 SR |
443 | fw_notify("A%c spd %x tl %02x, " |
444 | "%04x -> %04x, %s, " | |
445 | "%s, %04x%08x%s\n", | |
446 | dir, speed, header[0] >> 10 & 0x3f, | |
447 | header[1] >> 16, header[0] >> 16, evts[evt], | |
448 | tcodes[tcode], header[1] & 0xffff, header[2], specific); | |
ad3c0fe8 SR |
449 | break; |
450 | default: | |
161b96e7 SR |
451 | fw_notify("A%c spd %x tl %02x, " |
452 | "%04x -> %04x, %s, " | |
453 | "%s%s\n", | |
454 | dir, speed, header[0] >> 10 & 0x3f, | |
455 | header[1] >> 16, header[0] >> 16, evts[evt], | |
456 | tcodes[tcode], specific); | |
ad3c0fe8 SR |
457 | } |
458 | } | |
459 | ||
460 | #else | |
461 | ||
5da3dac8 SR |
462 | #define param_debug 0 |
463 | static inline void log_irqs(u32 evt) {} | |
464 | static inline void log_selfids(int node_id, int generation, int self_id_count, u32 *s) {} | |
465 | static inline void log_ar_at_event(char dir, int speed, u32 *header, int evt) {} | |
ad3c0fe8 SR |
466 | |
467 | #endif /* CONFIG_FIREWIRE_OHCI_DEBUG */ | |
468 | ||
95688e97 | 469 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
ed568912 KH |
470 | { |
471 | writel(data, ohci->registers + offset); | |
472 | } | |
473 | ||
95688e97 | 474 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
ed568912 KH |
475 | { |
476 | return readl(ohci->registers + offset); | |
477 | } | |
478 | ||
95688e97 | 479 | static inline void flush_writes(const struct fw_ohci *ohci) |
ed568912 KH |
480 | { |
481 | /* Do a dummy read to flush writes. */ | |
482 | reg_read(ohci, OHCI1394_Version); | |
483 | } | |
484 | ||
35d999b1 | 485 | static int read_phy_reg(struct fw_ohci *ohci, int addr) |
ed568912 | 486 | { |
4a96b4fc | 487 | u32 val; |
35d999b1 | 488 | int i; |
ed568912 KH |
489 | |
490 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); | |
153e3979 | 491 | for (i = 0; i < 3 + 100; i++) { |
35d999b1 SR |
492 | val = reg_read(ohci, OHCI1394_PhyControl); |
493 | if (val & OHCI1394_PhyControl_ReadDone) | |
494 | return OHCI1394_PhyControl_ReadData(val); | |
495 | ||
153e3979 CL |
496 | /* |
497 | * Try a few times without waiting. Sleeping is necessary | |
498 | * only when the link/PHY interface is busy. | |
499 | */ | |
500 | if (i >= 3) | |
501 | msleep(1); | |
ed568912 | 502 | } |
35d999b1 | 503 | fw_error("failed to read phy reg\n"); |
ed568912 | 504 | |
35d999b1 SR |
505 | return -EBUSY; |
506 | } | |
4a96b4fc | 507 | |
35d999b1 SR |
508 | static int write_phy_reg(const struct fw_ohci *ohci, int addr, u32 val) |
509 | { | |
510 | int i; | |
ed568912 | 511 | |
ed568912 | 512 | reg_write(ohci, OHCI1394_PhyControl, |
35d999b1 | 513 | OHCI1394_PhyControl_Write(addr, val)); |
153e3979 | 514 | for (i = 0; i < 3 + 100; i++) { |
35d999b1 SR |
515 | val = reg_read(ohci, OHCI1394_PhyControl); |
516 | if (!(val & OHCI1394_PhyControl_WritePending)) | |
517 | return 0; | |
ed568912 | 518 | |
153e3979 CL |
519 | if (i >= 3) |
520 | msleep(1); | |
35d999b1 SR |
521 | } |
522 | fw_error("failed to write phy reg\n"); | |
523 | ||
524 | return -EBUSY; | |
4a96b4fc CL |
525 | } |
526 | ||
02d37bed SR |
527 | static int update_phy_reg(struct fw_ohci *ohci, int addr, |
528 | int clear_bits, int set_bits) | |
4a96b4fc | 529 | { |
02d37bed | 530 | int ret = read_phy_reg(ohci, addr); |
35d999b1 SR |
531 | if (ret < 0) |
532 | return ret; | |
4a96b4fc | 533 | |
e7014dad CL |
534 | /* |
535 | * The interrupt status bits are cleared by writing a one bit. | |
536 | * Avoid clearing them unless explicitly requested in set_bits. | |
537 | */ | |
538 | if (addr == 5) | |
539 | clear_bits |= PHY_INT_STATUS_BITS; | |
540 | ||
35d999b1 | 541 | return write_phy_reg(ohci, addr, (ret & ~clear_bits) | set_bits); |
ed568912 KH |
542 | } |
543 | ||
35d999b1 | 544 | static int read_paged_phy_reg(struct fw_ohci *ohci, int page, int addr) |
925e7a65 | 545 | { |
35d999b1 | 546 | int ret; |
925e7a65 | 547 | |
02d37bed | 548 | ret = update_phy_reg(ohci, 7, PHY_PAGE_SELECT, page << 5); |
35d999b1 SR |
549 | if (ret < 0) |
550 | return ret; | |
925e7a65 | 551 | |
35d999b1 | 552 | return read_phy_reg(ohci, addr); |
ed568912 KH |
553 | } |
554 | ||
02d37bed SR |
555 | static int ohci_read_phy_reg(struct fw_card *card, int addr) |
556 | { | |
557 | struct fw_ohci *ohci = fw_ohci(card); | |
558 | int ret; | |
559 | ||
560 | mutex_lock(&ohci->phy_reg_mutex); | |
561 | ret = read_phy_reg(ohci, addr); | |
562 | mutex_unlock(&ohci->phy_reg_mutex); | |
563 | ||
564 | return ret; | |
565 | } | |
566 | ||
567 | static int ohci_update_phy_reg(struct fw_card *card, int addr, | |
568 | int clear_bits, int set_bits) | |
569 | { | |
570 | struct fw_ohci *ohci = fw_ohci(card); | |
571 | int ret; | |
572 | ||
573 | mutex_lock(&ohci->phy_reg_mutex); | |
574 | ret = update_phy_reg(ohci, addr, clear_bits, set_bits); | |
575 | mutex_unlock(&ohci->phy_reg_mutex); | |
576 | ||
577 | return ret; | |
ed568912 KH |
578 | } |
579 | ||
32b46093 | 580 | static int ar_context_add_page(struct ar_context *ctx) |
ed568912 | 581 | { |
32b46093 KH |
582 | struct device *dev = ctx->ohci->card.device; |
583 | struct ar_buffer *ab; | |
f5101d58 | 584 | dma_addr_t uninitialized_var(ab_bus); |
32b46093 KH |
585 | size_t offset; |
586 | ||
bde1709a | 587 | ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC); |
32b46093 KH |
588 | if (ab == NULL) |
589 | return -ENOMEM; | |
590 | ||
a55709ba | 591 | ab->next = NULL; |
2d826cc5 | 592 | memset(&ab->descriptor, 0, sizeof(ab->descriptor)); |
a77754a7 KH |
593 | ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | |
594 | DESCRIPTOR_STATUS | | |
595 | DESCRIPTOR_BRANCH_ALWAYS); | |
32b46093 KH |
596 | offset = offsetof(struct ar_buffer, data); |
597 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); | |
598 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); | |
599 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); | |
600 | ab->descriptor.branch_address = 0; | |
601 | ||
071595eb | 602 | wmb(); /* finish init of new descriptors before branch_address update */ |
ec839e43 | 603 | ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1); |
32b46093 KH |
604 | ctx->last_buffer->next = ab; |
605 | ctx->last_buffer = ab; | |
606 | ||
a77754a7 | 607 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
ed568912 | 608 | flush_writes(ctx->ohci); |
32b46093 KH |
609 | |
610 | return 0; | |
ed568912 KH |
611 | } |
612 | ||
a55709ba JF |
613 | static void ar_context_release(struct ar_context *ctx) |
614 | { | |
615 | struct ar_buffer *ab, *ab_next; | |
616 | size_t offset; | |
617 | dma_addr_t ab_bus; | |
618 | ||
619 | for (ab = ctx->current_buffer; ab; ab = ab_next) { | |
620 | ab_next = ab->next; | |
621 | offset = offsetof(struct ar_buffer, data); | |
622 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; | |
623 | dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
624 | ab, ab_bus); | |
625 | } | |
626 | } | |
627 | ||
11bf20ad SR |
628 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
629 | #define cond_le32_to_cpu(v) \ | |
4a635593 | 630 | (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v)) |
11bf20ad SR |
631 | #else |
632 | #define cond_le32_to_cpu(v) le32_to_cpu(v) | |
633 | #endif | |
634 | ||
32b46093 | 635 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 636 | { |
ed568912 | 637 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
638 | struct fw_packet p; |
639 | u32 status, length, tcode; | |
43286568 | 640 | int evt; |
2639a6fb | 641 | |
11bf20ad SR |
642 | p.header[0] = cond_le32_to_cpu(buffer[0]); |
643 | p.header[1] = cond_le32_to_cpu(buffer[1]); | |
644 | p.header[2] = cond_le32_to_cpu(buffer[2]); | |
2639a6fb KH |
645 | |
646 | tcode = (p.header[0] >> 4) & 0x0f; | |
647 | switch (tcode) { | |
648 | case TCODE_WRITE_QUADLET_REQUEST: | |
649 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 650 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 651 | p.header_length = 16; |
32b46093 | 652 | p.payload_length = 0; |
2639a6fb KH |
653 | break; |
654 | ||
2639a6fb | 655 | case TCODE_READ_BLOCK_REQUEST : |
11bf20ad | 656 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
32b46093 KH |
657 | p.header_length = 16; |
658 | p.payload_length = 0; | |
659 | break; | |
660 | ||
661 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
662 | case TCODE_READ_BLOCK_RESPONSE: |
663 | case TCODE_LOCK_REQUEST: | |
664 | case TCODE_LOCK_RESPONSE: | |
11bf20ad | 665 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
2639a6fb | 666 | p.header_length = 16; |
32b46093 | 667 | p.payload_length = p.header[3] >> 16; |
2639a6fb KH |
668 | break; |
669 | ||
670 | case TCODE_WRITE_RESPONSE: | |
671 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 672 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 673 | p.header_length = 12; |
32b46093 | 674 | p.payload_length = 0; |
2639a6fb | 675 | break; |
ccff9629 SR |
676 | |
677 | default: | |
678 | /* FIXME: Stop context, discard everything, and restart? */ | |
679 | p.header_length = 0; | |
680 | p.payload_length = 0; | |
2639a6fb | 681 | } |
ed568912 | 682 | |
32b46093 KH |
683 | p.payload = (void *) buffer + p.header_length; |
684 | ||
685 | /* FIXME: What to do about evt_* errors? */ | |
686 | length = (p.header_length + p.payload_length + 3) / 4; | |
11bf20ad | 687 | status = cond_le32_to_cpu(buffer[length]); |
43286568 | 688 | evt = (status >> 16) & 0x1f; |
32b46093 | 689 | |
43286568 | 690 | p.ack = evt - 16; |
32b46093 KH |
691 | p.speed = (status >> 21) & 0x7; |
692 | p.timestamp = status & 0xffff; | |
693 | p.generation = ohci->request_generation; | |
ed568912 | 694 | |
43286568 | 695 | log_ar_at_event('R', p.speed, p.header, evt); |
ad3c0fe8 | 696 | |
c781c06d | 697 | /* |
a4dc090b SR |
698 | * Several controllers, notably from NEC and VIA, forget to |
699 | * write ack_complete status at PHY packet reception. | |
700 | */ | |
701 | if (evt == OHCI1394_evt_no_status && | |
702 | (p.header[0] & 0xff) == (OHCI1394_phy_tcode << 4)) | |
703 | p.ack = ACK_COMPLETE; | |
704 | ||
705 | /* | |
706 | * The OHCI bus reset handler synthesizes a PHY packet with | |
ed568912 KH |
707 | * the new generation number when a bus reset happens (see |
708 | * section 8.4.2.3). This helps us determine when a request | |
709 | * was received and make sure we send the response in the same | |
710 | * generation. We only need this for requests; for responses | |
711 | * we use the unique tlabel for finding the matching | |
c781c06d | 712 | * request. |
d34316a4 SR |
713 | * |
714 | * Alas some chips sometimes emit bus reset packets with a | |
715 | * wrong generation. We set the correct generation for these | |
716 | * at a slightly incorrect time (in bus_reset_tasklet). | |
c781c06d | 717 | */ |
d34316a4 | 718 | if (evt == OHCI1394_evt_bus_reset) { |
4a635593 | 719 | if (!(ohci->quirks & QUIRK_RESET_PACKET)) |
d34316a4 SR |
720 | ohci->request_generation = (p.header[2] >> 16) & 0xff; |
721 | } else if (ctx == &ohci->ar_request_ctx) { | |
2639a6fb | 722 | fw_core_handle_request(&ohci->card, &p); |
d34316a4 | 723 | } else { |
2639a6fb | 724 | fw_core_handle_response(&ohci->card, &p); |
d34316a4 | 725 | } |
ed568912 | 726 | |
32b46093 KH |
727 | return buffer + length + 1; |
728 | } | |
ed568912 | 729 | |
32b46093 KH |
730 | static void ar_context_tasklet(unsigned long data) |
731 | { | |
732 | struct ar_context *ctx = (struct ar_context *)data; | |
733 | struct fw_ohci *ohci = ctx->ohci; | |
734 | struct ar_buffer *ab; | |
735 | struct descriptor *d; | |
736 | void *buffer, *end; | |
737 | ||
738 | ab = ctx->current_buffer; | |
739 | d = &ab->descriptor; | |
740 | ||
741 | if (d->res_count == 0) { | |
85f7ffd5 | 742 | size_t size, size2, rest, pktsize, size3, offset; |
6b84236d JW |
743 | dma_addr_t start_bus; |
744 | void *start; | |
32b46093 | 745 | |
c781c06d KH |
746 | /* |
747 | * This descriptor is finished and we may have a | |
32b46093 | 748 | * packet split across this and the next buffer. We |
c781c06d KH |
749 | * reuse the page for reassembling the split packet. |
750 | */ | |
32b46093 KH |
751 | |
752 | offset = offsetof(struct ar_buffer, data); | |
a1f805e5 | 753 | start = ab; |
6b84236d | 754 | start_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
a1f805e5 | 755 | buffer = ab->data; |
32b46093 | 756 | |
32b46093 KH |
757 | ab = ab->next; |
758 | d = &ab->descriptor; | |
a1f805e5 | 759 | size = start + PAGE_SIZE - ctx->pointer; |
85f7ffd5 | 760 | /* valid buffer data in the next page */ |
32b46093 | 761 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); |
85f7ffd5 | 762 | /* what actually fits in this page */ |
a1f805e5 | 763 | size2 = min(rest, (size_t)PAGE_SIZE - offset - size); |
32b46093 | 764 | memmove(buffer, ctx->pointer, size); |
85f7ffd5 | 765 | memcpy(buffer + size, ab->data, size2); |
85f7ffd5 CL |
766 | |
767 | while (size > 0) { | |
768 | void *next = handle_ar_packet(ctx, buffer); | |
769 | pktsize = next - buffer; | |
770 | if (pktsize >= size) { | |
771 | /* | |
772 | * We have handled all the data that was | |
773 | * originally in this page, so we can now | |
774 | * continue in the next page. | |
775 | */ | |
776 | buffer = next; | |
777 | break; | |
778 | } | |
779 | /* move the next packet to the start of the buffer */ | |
780 | memmove(buffer, next, size + size2 - pktsize); | |
781 | size -= pktsize; | |
782 | /* fill up this page again */ | |
783 | size3 = min(rest - size2, | |
a1f805e5 | 784 | (size_t)PAGE_SIZE - offset - size - size2); |
85f7ffd5 CL |
785 | memcpy(buffer + size + size2, |
786 | (void *) ab->data + size2, size3); | |
787 | size2 += size3; | |
788 | } | |
789 | ||
a1f805e5 CL |
790 | if (rest > 0) { |
791 | /* handle the packets that are fully in the next page */ | |
792 | buffer = (void *) ab->data + | |
793 | (buffer - (start + offset + size)); | |
794 | end = (void *) ab->data + rest; | |
32b46093 | 795 | |
a1f805e5 CL |
796 | while (buffer < end) |
797 | buffer = handle_ar_packet(ctx, buffer); | |
32b46093 | 798 | |
a1f805e5 CL |
799 | ctx->current_buffer = ab; |
800 | ctx->pointer = end; | |
801 | ||
802 | dma_free_coherent(ohci->card.device, PAGE_SIZE, | |
803 | start, start_bus); | |
804 | ar_context_add_page(ctx); | |
805 | } else { | |
806 | ctx->pointer = start + PAGE_SIZE; | |
807 | } | |
32b46093 KH |
808 | } else { |
809 | buffer = ctx->pointer; | |
810 | ctx->pointer = end = | |
811 | (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); | |
812 | ||
813 | while (buffer < end) | |
814 | buffer = handle_ar_packet(ctx, buffer); | |
815 | } | |
ed568912 KH |
816 | } |
817 | ||
53dca511 SR |
818 | static int ar_context_init(struct ar_context *ctx, |
819 | struct fw_ohci *ohci, u32 regs) | |
ed568912 | 820 | { |
32b46093 | 821 | struct ar_buffer ab; |
ed568912 | 822 | |
72e318e0 KH |
823 | ctx->regs = regs; |
824 | ctx->ohci = ohci; | |
825 | ctx->last_buffer = &ab; | |
ed568912 KH |
826 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
827 | ||
32b46093 KH |
828 | ar_context_add_page(ctx); |
829 | ar_context_add_page(ctx); | |
830 | ctx->current_buffer = ab.next; | |
831 | ctx->pointer = ctx->current_buffer->data; | |
832 | ||
2aef469a KH |
833 | return 0; |
834 | } | |
835 | ||
836 | static void ar_context_run(struct ar_context *ctx) | |
837 | { | |
838 | struct ar_buffer *ab = ctx->current_buffer; | |
839 | dma_addr_t ab_bus; | |
840 | size_t offset; | |
841 | ||
842 | offset = offsetof(struct ar_buffer, data); | |
0a9972ba | 843 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
2aef469a KH |
844 | |
845 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1); | |
a77754a7 | 846 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
32b46093 | 847 | flush_writes(ctx->ohci); |
ed568912 | 848 | } |
373b2edd | 849 | |
53dca511 | 850 | static struct descriptor *find_branch_descriptor(struct descriptor *d, int z) |
a186b4a6 JW |
851 | { |
852 | int b, key; | |
853 | ||
854 | b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2; | |
855 | key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8; | |
856 | ||
857 | /* figure out which descriptor the branch address goes in */ | |
858 | if (z == 2 && (b == 3 || key == 2)) | |
859 | return d; | |
860 | else | |
861 | return d + z - 1; | |
862 | } | |
863 | ||
30200739 KH |
864 | static void context_tasklet(unsigned long data) |
865 | { | |
866 | struct context *ctx = (struct context *) data; | |
30200739 KH |
867 | struct descriptor *d, *last; |
868 | u32 address; | |
869 | int z; | |
fe5ca634 | 870 | struct descriptor_buffer *desc; |
30200739 | 871 | |
fe5ca634 DM |
872 | desc = list_entry(ctx->buffer_list.next, |
873 | struct descriptor_buffer, list); | |
874 | last = ctx->last; | |
30200739 | 875 | while (last->branch_address != 0) { |
fe5ca634 | 876 | struct descriptor_buffer *old_desc = desc; |
30200739 KH |
877 | address = le32_to_cpu(last->branch_address); |
878 | z = address & 0xf; | |
fe5ca634 DM |
879 | address &= ~0xf; |
880 | ||
881 | /* If the branch address points to a buffer outside of the | |
882 | * current buffer, advance to the next buffer. */ | |
883 | if (address < desc->buffer_bus || | |
884 | address >= desc->buffer_bus + desc->used) | |
885 | desc = list_entry(desc->list.next, | |
886 | struct descriptor_buffer, list); | |
887 | d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d); | |
a186b4a6 | 888 | last = find_branch_descriptor(d, z); |
30200739 KH |
889 | |
890 | if (!ctx->callback(ctx, d, last)) | |
891 | break; | |
892 | ||
fe5ca634 DM |
893 | if (old_desc != desc) { |
894 | /* If we've advanced to the next buffer, move the | |
895 | * previous buffer to the free list. */ | |
896 | unsigned long flags; | |
897 | old_desc->used = 0; | |
898 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
899 | list_move_tail(&old_desc->list, &ctx->buffer_list); | |
900 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); | |
901 | } | |
902 | ctx->last = last; | |
30200739 KH |
903 | } |
904 | } | |
905 | ||
fe5ca634 DM |
906 | /* |
907 | * Allocate a new buffer and add it to the list of free buffers for this | |
908 | * context. Must be called with ohci->lock held. | |
909 | */ | |
53dca511 | 910 | static int context_add_buffer(struct context *ctx) |
fe5ca634 DM |
911 | { |
912 | struct descriptor_buffer *desc; | |
f5101d58 | 913 | dma_addr_t uninitialized_var(bus_addr); |
fe5ca634 DM |
914 | int offset; |
915 | ||
916 | /* | |
917 | * 16MB of descriptors should be far more than enough for any DMA | |
918 | * program. This will catch run-away userspace or DoS attacks. | |
919 | */ | |
920 | if (ctx->total_allocation >= 16*1024*1024) | |
921 | return -ENOMEM; | |
922 | ||
923 | desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
924 | &bus_addr, GFP_ATOMIC); | |
925 | if (!desc) | |
926 | return -ENOMEM; | |
927 | ||
928 | offset = (void *)&desc->buffer - (void *)desc; | |
929 | desc->buffer_size = PAGE_SIZE - offset; | |
930 | desc->buffer_bus = bus_addr + offset; | |
931 | desc->used = 0; | |
932 | ||
933 | list_add_tail(&desc->list, &ctx->buffer_list); | |
934 | ctx->total_allocation += PAGE_SIZE; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
53dca511 SR |
939 | static int context_init(struct context *ctx, struct fw_ohci *ohci, |
940 | u32 regs, descriptor_callback_t callback) | |
30200739 KH |
941 | { |
942 | ctx->ohci = ohci; | |
943 | ctx->regs = regs; | |
fe5ca634 DM |
944 | ctx->total_allocation = 0; |
945 | ||
946 | INIT_LIST_HEAD(&ctx->buffer_list); | |
947 | if (context_add_buffer(ctx) < 0) | |
30200739 KH |
948 | return -ENOMEM; |
949 | ||
fe5ca634 DM |
950 | ctx->buffer_tail = list_entry(ctx->buffer_list.next, |
951 | struct descriptor_buffer, list); | |
952 | ||
30200739 KH |
953 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); |
954 | ctx->callback = callback; | |
955 | ||
c781c06d KH |
956 | /* |
957 | * We put a dummy descriptor in the buffer that has a NULL | |
30200739 | 958 | * branch address and looks like it's been sent. That way we |
fe5ca634 | 959 | * have a descriptor to append DMA programs to. |
c781c06d | 960 | */ |
fe5ca634 DM |
961 | memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer)); |
962 | ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); | |
963 | ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011); | |
964 | ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer); | |
965 | ctx->last = ctx->buffer_tail->buffer; | |
966 | ctx->prev = ctx->buffer_tail->buffer; | |
30200739 KH |
967 | |
968 | return 0; | |
969 | } | |
970 | ||
53dca511 | 971 | static void context_release(struct context *ctx) |
30200739 KH |
972 | { |
973 | struct fw_card *card = &ctx->ohci->card; | |
fe5ca634 | 974 | struct descriptor_buffer *desc, *tmp; |
30200739 | 975 | |
fe5ca634 DM |
976 | list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list) |
977 | dma_free_coherent(card->device, PAGE_SIZE, desc, | |
978 | desc->buffer_bus - | |
979 | ((void *)&desc->buffer - (void *)desc)); | |
30200739 KH |
980 | } |
981 | ||
fe5ca634 | 982 | /* Must be called with ohci->lock held */ |
53dca511 SR |
983 | static struct descriptor *context_get_descriptors(struct context *ctx, |
984 | int z, dma_addr_t *d_bus) | |
30200739 | 985 | { |
fe5ca634 DM |
986 | struct descriptor *d = NULL; |
987 | struct descriptor_buffer *desc = ctx->buffer_tail; | |
988 | ||
989 | if (z * sizeof(*d) > desc->buffer_size) | |
990 | return NULL; | |
991 | ||
992 | if (z * sizeof(*d) > desc->buffer_size - desc->used) { | |
993 | /* No room for the descriptor in this buffer, so advance to the | |
994 | * next one. */ | |
30200739 | 995 | |
fe5ca634 DM |
996 | if (desc->list.next == &ctx->buffer_list) { |
997 | /* If there is no free buffer next in the list, | |
998 | * allocate one. */ | |
999 | if (context_add_buffer(ctx) < 0) | |
1000 | return NULL; | |
1001 | } | |
1002 | desc = list_entry(desc->list.next, | |
1003 | struct descriptor_buffer, list); | |
1004 | ctx->buffer_tail = desc; | |
1005 | } | |
30200739 | 1006 | |
fe5ca634 | 1007 | d = desc->buffer + desc->used / sizeof(*d); |
2d826cc5 | 1008 | memset(d, 0, z * sizeof(*d)); |
fe5ca634 | 1009 | *d_bus = desc->buffer_bus + desc->used; |
30200739 KH |
1010 | |
1011 | return d; | |
1012 | } | |
1013 | ||
295e3feb | 1014 | static void context_run(struct context *ctx, u32 extra) |
30200739 KH |
1015 | { |
1016 | struct fw_ohci *ohci = ctx->ohci; | |
1017 | ||
a77754a7 | 1018 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
fe5ca634 | 1019 | le32_to_cpu(ctx->last->branch_address)); |
a77754a7 KH |
1020 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
1021 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); | |
30200739 KH |
1022 | flush_writes(ohci); |
1023 | } | |
1024 | ||
1025 | static void context_append(struct context *ctx, | |
1026 | struct descriptor *d, int z, int extra) | |
1027 | { | |
1028 | dma_addr_t d_bus; | |
fe5ca634 | 1029 | struct descriptor_buffer *desc = ctx->buffer_tail; |
30200739 | 1030 | |
fe5ca634 | 1031 | d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d); |
30200739 | 1032 | |
fe5ca634 | 1033 | desc->used += (z + extra) * sizeof(*d); |
071595eb SR |
1034 | |
1035 | wmb(); /* finish init of new descriptors before branch_address update */ | |
fe5ca634 DM |
1036 | ctx->prev->branch_address = cpu_to_le32(d_bus | z); |
1037 | ctx->prev = find_branch_descriptor(d, z); | |
30200739 | 1038 | |
a77754a7 | 1039 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
30200739 KH |
1040 | flush_writes(ctx->ohci); |
1041 | } | |
1042 | ||
1043 | static void context_stop(struct context *ctx) | |
1044 | { | |
1045 | u32 reg; | |
b8295668 | 1046 | int i; |
30200739 | 1047 | |
a77754a7 | 1048 | reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
b8295668 | 1049 | flush_writes(ctx->ohci); |
30200739 | 1050 | |
b8295668 | 1051 | for (i = 0; i < 10; i++) { |
a77754a7 | 1052 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
b8295668 | 1053 | if ((reg & CONTEXT_ACTIVE) == 0) |
b0068549 | 1054 | return; |
b8295668 | 1055 | |
b980f5a2 | 1056 | mdelay(1); |
b8295668 | 1057 | } |
b0068549 | 1058 | fw_error("Error: DMA context still active (0x%08x)\n", reg); |
30200739 | 1059 | } |
ed568912 | 1060 | |
f319b6a0 KH |
1061 | struct driver_data { |
1062 | struct fw_packet *packet; | |
1063 | }; | |
ed568912 | 1064 | |
c781c06d KH |
1065 | /* |
1066 | * This function apppends a packet to the DMA queue for transmission. | |
f319b6a0 | 1067 | * Must always be called with the ochi->lock held to ensure proper |
c781c06d KH |
1068 | * generation handling and locking around packet queue manipulation. |
1069 | */ | |
53dca511 SR |
1070 | static int at_context_queue_packet(struct context *ctx, |
1071 | struct fw_packet *packet) | |
ed568912 | 1072 | { |
ed568912 | 1073 | struct fw_ohci *ohci = ctx->ohci; |
4b6d51ec | 1074 | dma_addr_t d_bus, uninitialized_var(payload_bus); |
f319b6a0 KH |
1075 | struct driver_data *driver_data; |
1076 | struct descriptor *d, *last; | |
1077 | __le32 *header; | |
ed568912 | 1078 | int z, tcode; |
f319b6a0 | 1079 | u32 reg; |
ed568912 | 1080 | |
f319b6a0 KH |
1081 | d = context_get_descriptors(ctx, 4, &d_bus); |
1082 | if (d == NULL) { | |
1083 | packet->ack = RCODE_SEND_ERROR; | |
1084 | return -1; | |
ed568912 KH |
1085 | } |
1086 | ||
a77754a7 | 1087 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
f319b6a0 KH |
1088 | d[0].res_count = cpu_to_le16(packet->timestamp); |
1089 | ||
c781c06d KH |
1090 | /* |
1091 | * The DMA format for asyncronous link packets is different | |
ed568912 KH |
1092 | * from the IEEE1394 layout, so shift the fields around |
1093 | * accordingly. If header_length is 8, it's a PHY packet, to | |
c781c06d KH |
1094 | * which we need to prepend an extra quadlet. |
1095 | */ | |
f319b6a0 KH |
1096 | |
1097 | header = (__le32 *) &d[1]; | |
f8c2287c JF |
1098 | switch (packet->header_length) { |
1099 | case 16: | |
1100 | case 12: | |
f319b6a0 KH |
1101 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
1102 | (packet->speed << 16)); | |
1103 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
1104 | (packet->header[0] & 0xffff0000)); | |
1105 | header[2] = cpu_to_le32(packet->header[2]); | |
ed568912 KH |
1106 | |
1107 | tcode = (packet->header[0] >> 4) & 0x0f; | |
1108 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
f319b6a0 | 1109 | header[3] = cpu_to_le32(packet->header[3]); |
ed568912 | 1110 | else |
f319b6a0 KH |
1111 | header[3] = (__force __le32) packet->header[3]; |
1112 | ||
1113 | d[0].req_count = cpu_to_le16(packet->header_length); | |
f8c2287c JF |
1114 | break; |
1115 | ||
1116 | case 8: | |
f319b6a0 KH |
1117 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
1118 | (packet->speed << 16)); | |
1119 | header[1] = cpu_to_le32(packet->header[0]); | |
1120 | header[2] = cpu_to_le32(packet->header[1]); | |
1121 | d[0].req_count = cpu_to_le16(12); | |
cc550216 SR |
1122 | |
1123 | if (is_ping_packet(packet->header)) | |
1124 | d[0].control |= cpu_to_le16(DESCRIPTOR_PING); | |
f8c2287c JF |
1125 | break; |
1126 | ||
1127 | case 4: | |
1128 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | | |
1129 | (packet->speed << 16)); | |
1130 | header[1] = cpu_to_le32(packet->header[0] & 0xffff0000); | |
1131 | d[0].req_count = cpu_to_le16(8); | |
1132 | break; | |
1133 | ||
1134 | default: | |
1135 | /* BUG(); */ | |
1136 | packet->ack = RCODE_SEND_ERROR; | |
1137 | return -1; | |
ed568912 KH |
1138 | } |
1139 | ||
f319b6a0 KH |
1140 | driver_data = (struct driver_data *) &d[3]; |
1141 | driver_data->packet = packet; | |
20d11673 | 1142 | packet->driver_data = driver_data; |
a186b4a6 | 1143 | |
f319b6a0 KH |
1144 | if (packet->payload_length > 0) { |
1145 | payload_bus = | |
1146 | dma_map_single(ohci->card.device, packet->payload, | |
1147 | packet->payload_length, DMA_TO_DEVICE); | |
8d8bb39b | 1148 | if (dma_mapping_error(ohci->card.device, payload_bus)) { |
f319b6a0 KH |
1149 | packet->ack = RCODE_SEND_ERROR; |
1150 | return -1; | |
1151 | } | |
19593ffd SR |
1152 | packet->payload_bus = payload_bus; |
1153 | packet->payload_mapped = true; | |
f319b6a0 KH |
1154 | |
1155 | d[2].req_count = cpu_to_le16(packet->payload_length); | |
1156 | d[2].data_address = cpu_to_le32(payload_bus); | |
1157 | last = &d[2]; | |
1158 | z = 3; | |
ed568912 | 1159 | } else { |
f319b6a0 KH |
1160 | last = &d[0]; |
1161 | z = 2; | |
ed568912 | 1162 | } |
ed568912 | 1163 | |
a77754a7 KH |
1164 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
1165 | DESCRIPTOR_IRQ_ALWAYS | | |
1166 | DESCRIPTOR_BRANCH_ALWAYS); | |
ed568912 | 1167 | |
76f73ca1 JW |
1168 | /* |
1169 | * If the controller and packet generations don't match, we need to | |
1170 | * bail out and try again. If IntEvent.busReset is set, the AT context | |
1171 | * is halted, so appending to the context and trying to run it is | |
1172 | * futile. Most controllers do the right thing and just flush the AT | |
1173 | * queue (per section 7.2.3.2 of the OHCI 1.1 specification), but | |
1174 | * some controllers (like a JMicron JMB381 PCI-e) misbehave and wind | |
1175 | * up stalling out. So we just bail out in software and try again | |
1176 | * later, and everyone is happy. | |
1177 | * FIXME: Document how the locking works. | |
1178 | */ | |
1179 | if (ohci->generation != packet->generation || | |
1180 | reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) { | |
19593ffd | 1181 | if (packet->payload_mapped) |
ab88ca48 SR |
1182 | dma_unmap_single(ohci->card.device, payload_bus, |
1183 | packet->payload_length, DMA_TO_DEVICE); | |
f319b6a0 KH |
1184 | packet->ack = RCODE_GENERATION; |
1185 | return -1; | |
1186 | } | |
1187 | ||
1188 | context_append(ctx, d, z, 4 - z); | |
ed568912 | 1189 | |
f319b6a0 | 1190 | /* If the context isn't already running, start it up. */ |
a77754a7 | 1191 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
053b3080 | 1192 | if ((reg & CONTEXT_RUN) == 0) |
f319b6a0 KH |
1193 | context_run(ctx, 0); |
1194 | ||
1195 | return 0; | |
ed568912 KH |
1196 | } |
1197 | ||
f319b6a0 KH |
1198 | static int handle_at_packet(struct context *context, |
1199 | struct descriptor *d, | |
1200 | struct descriptor *last) | |
ed568912 | 1201 | { |
f319b6a0 | 1202 | struct driver_data *driver_data; |
ed568912 | 1203 | struct fw_packet *packet; |
f319b6a0 | 1204 | struct fw_ohci *ohci = context->ohci; |
ed568912 KH |
1205 | int evt; |
1206 | ||
f319b6a0 KH |
1207 | if (last->transfer_status == 0) |
1208 | /* This descriptor isn't done yet, stop iteration. */ | |
1209 | return 0; | |
ed568912 | 1210 | |
f319b6a0 KH |
1211 | driver_data = (struct driver_data *) &d[3]; |
1212 | packet = driver_data->packet; | |
1213 | if (packet == NULL) | |
1214 | /* This packet was cancelled, just continue. */ | |
1215 | return 1; | |
730c32f5 | 1216 | |
19593ffd | 1217 | if (packet->payload_mapped) |
1d1dc5e8 | 1218 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
ed568912 | 1219 | packet->payload_length, DMA_TO_DEVICE); |
ed568912 | 1220 | |
f319b6a0 KH |
1221 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
1222 | packet->timestamp = le16_to_cpu(last->res_count); | |
ed568912 | 1223 | |
ad3c0fe8 SR |
1224 | log_ar_at_event('T', packet->speed, packet->header, evt); |
1225 | ||
f319b6a0 KH |
1226 | switch (evt) { |
1227 | case OHCI1394_evt_timeout: | |
1228 | /* Async response transmit timed out. */ | |
1229 | packet->ack = RCODE_CANCELLED; | |
1230 | break; | |
ed568912 | 1231 | |
f319b6a0 | 1232 | case OHCI1394_evt_flushed: |
c781c06d KH |
1233 | /* |
1234 | * The packet was flushed should give same error as | |
1235 | * when we try to use a stale generation count. | |
1236 | */ | |
f319b6a0 KH |
1237 | packet->ack = RCODE_GENERATION; |
1238 | break; | |
ed568912 | 1239 | |
f319b6a0 | 1240 | case OHCI1394_evt_missing_ack: |
c781c06d KH |
1241 | /* |
1242 | * Using a valid (current) generation count, but the | |
1243 | * node is not on the bus or not sending acks. | |
1244 | */ | |
f319b6a0 KH |
1245 | packet->ack = RCODE_NO_ACK; |
1246 | break; | |
ed568912 | 1247 | |
f319b6a0 KH |
1248 | case ACK_COMPLETE + 0x10: |
1249 | case ACK_PENDING + 0x10: | |
1250 | case ACK_BUSY_X + 0x10: | |
1251 | case ACK_BUSY_A + 0x10: | |
1252 | case ACK_BUSY_B + 0x10: | |
1253 | case ACK_DATA_ERROR + 0x10: | |
1254 | case ACK_TYPE_ERROR + 0x10: | |
1255 | packet->ack = evt - 0x10; | |
1256 | break; | |
ed568912 | 1257 | |
f319b6a0 KH |
1258 | default: |
1259 | packet->ack = RCODE_SEND_ERROR; | |
1260 | break; | |
1261 | } | |
ed568912 | 1262 | |
f319b6a0 | 1263 | packet->callback(packet, &ohci->card, packet->ack); |
ed568912 | 1264 | |
f319b6a0 | 1265 | return 1; |
ed568912 KH |
1266 | } |
1267 | ||
a77754a7 KH |
1268 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
1269 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
1270 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
1271 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
1272 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
93c4cceb | 1273 | |
53dca511 SR |
1274 | static void handle_local_rom(struct fw_ohci *ohci, |
1275 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1276 | { |
1277 | struct fw_packet response; | |
1278 | int tcode, length, i; | |
1279 | ||
a77754a7 | 1280 | tcode = HEADER_GET_TCODE(packet->header[0]); |
93c4cceb | 1281 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
a77754a7 | 1282 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
93c4cceb KH |
1283 | else |
1284 | length = 4; | |
1285 | ||
1286 | i = csr - CSR_CONFIG_ROM; | |
1287 | if (i + length > CONFIG_ROM_SIZE) { | |
1288 | fw_fill_response(&response, packet->header, | |
1289 | RCODE_ADDRESS_ERROR, NULL, 0); | |
1290 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
1291 | fw_fill_response(&response, packet->header, | |
1292 | RCODE_TYPE_ERROR, NULL, 0); | |
1293 | } else { | |
1294 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
1295 | (void *) ohci->config_rom + i, length); | |
1296 | } | |
1297 | ||
1298 | fw_core_handle_response(&ohci->card, &response); | |
1299 | } | |
1300 | ||
53dca511 SR |
1301 | static void handle_local_lock(struct fw_ohci *ohci, |
1302 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1303 | { |
1304 | struct fw_packet response; | |
e1393667 | 1305 | int tcode, length, ext_tcode, sel, try; |
93c4cceb KH |
1306 | __be32 *payload, lock_old; |
1307 | u32 lock_arg, lock_data; | |
1308 | ||
a77754a7 KH |
1309 | tcode = HEADER_GET_TCODE(packet->header[0]); |
1310 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); | |
93c4cceb | 1311 | payload = packet->payload; |
a77754a7 | 1312 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
93c4cceb KH |
1313 | |
1314 | if (tcode == TCODE_LOCK_REQUEST && | |
1315 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
1316 | lock_arg = be32_to_cpu(payload[0]); | |
1317 | lock_data = be32_to_cpu(payload[1]); | |
1318 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1319 | lock_arg = 0; | |
1320 | lock_data = 0; | |
1321 | } else { | |
1322 | fw_fill_response(&response, packet->header, | |
1323 | RCODE_TYPE_ERROR, NULL, 0); | |
1324 | goto out; | |
1325 | } | |
1326 | ||
1327 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
1328 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
1329 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
1330 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
1331 | ||
e1393667 CL |
1332 | for (try = 0; try < 20; try++) |
1333 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) { | |
1334 | lock_old = cpu_to_be32(reg_read(ohci, | |
1335 | OHCI1394_CSRData)); | |
1336 | fw_fill_response(&response, packet->header, | |
1337 | RCODE_COMPLETE, | |
1338 | &lock_old, sizeof(lock_old)); | |
1339 | goto out; | |
1340 | } | |
1341 | ||
1342 | fw_error("swap not done (CSR lock timeout)\n"); | |
1343 | fw_fill_response(&response, packet->header, RCODE_BUSY, NULL, 0); | |
93c4cceb | 1344 | |
93c4cceb KH |
1345 | out: |
1346 | fw_core_handle_response(&ohci->card, &response); | |
1347 | } | |
1348 | ||
53dca511 | 1349 | static void handle_local_request(struct context *ctx, struct fw_packet *packet) |
93c4cceb | 1350 | { |
2608203d | 1351 | u64 offset, csr; |
93c4cceb | 1352 | |
473d28c7 KH |
1353 | if (ctx == &ctx->ohci->at_request_ctx) { |
1354 | packet->ack = ACK_PENDING; | |
1355 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1356 | } | |
93c4cceb KH |
1357 | |
1358 | offset = | |
1359 | ((unsigned long long) | |
a77754a7 | 1360 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
93c4cceb KH |
1361 | packet->header[2]; |
1362 | csr = offset - CSR_REGISTER_BASE; | |
1363 | ||
1364 | /* Handle config rom reads. */ | |
1365 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
1366 | handle_local_rom(ctx->ohci, packet, csr); | |
1367 | else switch (csr) { | |
1368 | case CSR_BUS_MANAGER_ID: | |
1369 | case CSR_BANDWIDTH_AVAILABLE: | |
1370 | case CSR_CHANNELS_AVAILABLE_HI: | |
1371 | case CSR_CHANNELS_AVAILABLE_LO: | |
1372 | handle_local_lock(ctx->ohci, packet, csr); | |
1373 | break; | |
1374 | default: | |
1375 | if (ctx == &ctx->ohci->at_request_ctx) | |
1376 | fw_core_handle_request(&ctx->ohci->card, packet); | |
1377 | else | |
1378 | fw_core_handle_response(&ctx->ohci->card, packet); | |
1379 | break; | |
1380 | } | |
473d28c7 KH |
1381 | |
1382 | if (ctx == &ctx->ohci->at_response_ctx) { | |
1383 | packet->ack = ACK_COMPLETE; | |
1384 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1385 | } | |
93c4cceb | 1386 | } |
e636fe25 | 1387 | |
53dca511 | 1388 | static void at_context_transmit(struct context *ctx, struct fw_packet *packet) |
ed568912 | 1389 | { |
ed568912 | 1390 | unsigned long flags; |
2dbd7d7e | 1391 | int ret; |
ed568912 KH |
1392 | |
1393 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
1394 | ||
a77754a7 | 1395 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
e636fe25 | 1396 | ctx->ohci->generation == packet->generation) { |
93c4cceb KH |
1397 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1398 | handle_local_request(ctx, packet); | |
1399 | return; | |
e636fe25 | 1400 | } |
ed568912 | 1401 | |
2dbd7d7e | 1402 | ret = at_context_queue_packet(ctx, packet); |
ed568912 KH |
1403 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1404 | ||
2dbd7d7e | 1405 | if (ret < 0) |
f319b6a0 | 1406 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
a186b4a6 | 1407 | |
ed568912 KH |
1408 | } |
1409 | ||
a48777e0 CL |
1410 | static u32 cycle_timer_ticks(u32 cycle_timer) |
1411 | { | |
1412 | u32 ticks; | |
1413 | ||
1414 | ticks = cycle_timer & 0xfff; | |
1415 | ticks += 3072 * ((cycle_timer >> 12) & 0x1fff); | |
1416 | ticks += (3072 * 8000) * (cycle_timer >> 25); | |
1417 | ||
1418 | return ticks; | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * Some controllers exhibit one or more of the following bugs when updating the | |
1423 | * iso cycle timer register: | |
1424 | * - When the lowest six bits are wrapping around to zero, a read that happens | |
1425 | * at the same time will return garbage in the lowest ten bits. | |
1426 | * - When the cycleOffset field wraps around to zero, the cycleCount field is | |
1427 | * not incremented for about 60 ns. | |
1428 | * - Occasionally, the entire register reads zero. | |
1429 | * | |
1430 | * To catch these, we read the register three times and ensure that the | |
1431 | * difference between each two consecutive reads is approximately the same, i.e. | |
1432 | * less than twice the other. Furthermore, any negative difference indicates an | |
1433 | * error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to | |
1434 | * execute, so we have enough precision to compute the ratio of the differences.) | |
1435 | */ | |
1436 | static u32 get_cycle_time(struct fw_ohci *ohci) | |
1437 | { | |
1438 | u32 c0, c1, c2; | |
1439 | u32 t0, t1, t2; | |
1440 | s32 diff01, diff12; | |
1441 | int i; | |
1442 | ||
1443 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1444 | ||
1445 | if (ohci->quirks & QUIRK_CYCLE_TIMER) { | |
1446 | i = 0; | |
1447 | c1 = c2; | |
1448 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1449 | do { | |
1450 | c0 = c1; | |
1451 | c1 = c2; | |
1452 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1453 | t0 = cycle_timer_ticks(c0); | |
1454 | t1 = cycle_timer_ticks(c1); | |
1455 | t2 = cycle_timer_ticks(c2); | |
1456 | diff01 = t1 - t0; | |
1457 | diff12 = t2 - t1; | |
1458 | } while ((diff01 <= 0 || diff12 <= 0 || | |
1459 | diff01 / diff12 >= 2 || diff12 / diff01 >= 2) | |
1460 | && i++ < 20); | |
1461 | } | |
1462 | ||
1463 | return c2; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * This function has to be called at least every 64 seconds. The bus_time | |
1468 | * field stores not only the upper 25 bits of the BUS_TIME register but also | |
1469 | * the most significant bit of the cycle timer in bit 6 so that we can detect | |
1470 | * changes in this bit. | |
1471 | */ | |
1472 | static u32 update_bus_time(struct fw_ohci *ohci) | |
1473 | { | |
1474 | u32 cycle_time_seconds = get_cycle_time(ohci) >> 25; | |
1475 | ||
1476 | if ((ohci->bus_time & 0x40) != (cycle_time_seconds & 0x40)) | |
1477 | ohci->bus_time += 0x40; | |
1478 | ||
1479 | return ohci->bus_time | cycle_time_seconds; | |
1480 | } | |
1481 | ||
ed568912 KH |
1482 | static void bus_reset_tasklet(unsigned long data) |
1483 | { | |
1484 | struct fw_ohci *ohci = (struct fw_ohci *)data; | |
e636fe25 | 1485 | int self_id_count, i, j, reg; |
ed568912 KH |
1486 | int generation, new_generation; |
1487 | unsigned long flags; | |
4eaff7d6 SR |
1488 | void *free_rom = NULL; |
1489 | dma_addr_t free_rom_bus = 0; | |
4ffb7a6a | 1490 | bool is_new_root; |
ed568912 KH |
1491 | |
1492 | reg = reg_read(ohci, OHCI1394_NodeID); | |
1493 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
02ff8f8e | 1494 | fw_notify("node ID not valid, new bus reset in progress\n"); |
ed568912 KH |
1495 | return; |
1496 | } | |
02ff8f8e SR |
1497 | if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { |
1498 | fw_notify("malconfigured bus\n"); | |
1499 | return; | |
1500 | } | |
1501 | ohci->node_id = reg & (OHCI1394_NodeID_busNumber | | |
1502 | OHCI1394_NodeID_nodeNumber); | |
ed568912 | 1503 | |
4ffb7a6a CL |
1504 | is_new_root = (reg & OHCI1394_NodeID_root) != 0; |
1505 | if (!(ohci->is_root && is_new_root)) | |
1506 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1507 | OHCI1394_LinkControl_cycleMaster); | |
1508 | ohci->is_root = is_new_root; | |
1509 | ||
c8a9a498 SR |
1510 | reg = reg_read(ohci, OHCI1394_SelfIDCount); |
1511 | if (reg & OHCI1394_SelfIDCount_selfIDError) { | |
1512 | fw_notify("inconsistent self IDs\n"); | |
1513 | return; | |
1514 | } | |
c781c06d KH |
1515 | /* |
1516 | * The count in the SelfIDCount register is the number of | |
ed568912 KH |
1517 | * bytes in the self ID receive buffer. Since we also receive |
1518 | * the inverted quadlets and a header quadlet, we shift one | |
c781c06d KH |
1519 | * bit extra to get the actual number of self IDs. |
1520 | */ | |
928ec5f1 SR |
1521 | self_id_count = (reg >> 3) & 0xff; |
1522 | if (self_id_count == 0 || self_id_count > 252) { | |
016bf3df SR |
1523 | fw_notify("inconsistent self IDs\n"); |
1524 | return; | |
1525 | } | |
11bf20ad | 1526 | generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; |
ee71c2f9 | 1527 | rmb(); |
ed568912 KH |
1528 | |
1529 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
c8a9a498 SR |
1530 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) { |
1531 | fw_notify("inconsistent self IDs\n"); | |
1532 | return; | |
1533 | } | |
11bf20ad SR |
1534 | ohci->self_id_buffer[j] = |
1535 | cond_le32_to_cpu(ohci->self_id_cpu[i]); | |
ed568912 | 1536 | } |
ee71c2f9 | 1537 | rmb(); |
ed568912 | 1538 | |
c781c06d KH |
1539 | /* |
1540 | * Check the consistency of the self IDs we just read. The | |
ed568912 KH |
1541 | * problem we face is that a new bus reset can start while we |
1542 | * read out the self IDs from the DMA buffer. If this happens, | |
1543 | * the DMA buffer will be overwritten with new self IDs and we | |
1544 | * will read out inconsistent data. The OHCI specification | |
1545 | * (section 11.2) recommends a technique similar to | |
1546 | * linux/seqlock.h, where we remember the generation of the | |
1547 | * self IDs in the buffer before reading them out and compare | |
1548 | * it to the current generation after reading them out. If | |
1549 | * the two generations match we know we have a consistent set | |
c781c06d KH |
1550 | * of self IDs. |
1551 | */ | |
ed568912 KH |
1552 | |
1553 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
1554 | if (new_generation != generation) { | |
1555 | fw_notify("recursive bus reset detected, " | |
1556 | "discarding self ids\n"); | |
1557 | return; | |
1558 | } | |
1559 | ||
1560 | /* FIXME: Document how the locking works. */ | |
1561 | spin_lock_irqsave(&ohci->lock, flags); | |
1562 | ||
1563 | ohci->generation = generation; | |
f319b6a0 KH |
1564 | context_stop(&ohci->at_request_ctx); |
1565 | context_stop(&ohci->at_response_ctx); | |
ed568912 KH |
1566 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
1567 | ||
4a635593 | 1568 | if (ohci->quirks & QUIRK_RESET_PACKET) |
d34316a4 SR |
1569 | ohci->request_generation = generation; |
1570 | ||
c781c06d KH |
1571 | /* |
1572 | * This next bit is unrelated to the AT context stuff but we | |
ed568912 KH |
1573 | * have to do it under the spinlock also. If a new config rom |
1574 | * was set up before this reset, the old one is now no longer | |
1575 | * in use and we can free it. Update the config rom pointers | |
1576 | * to point to the current config rom and clear the | |
88393161 | 1577 | * next_config_rom pointer so a new update can take place. |
c781c06d | 1578 | */ |
ed568912 KH |
1579 | |
1580 | if (ohci->next_config_rom != NULL) { | |
0bd243c4 KH |
1581 | if (ohci->next_config_rom != ohci->config_rom) { |
1582 | free_rom = ohci->config_rom; | |
1583 | free_rom_bus = ohci->config_rom_bus; | |
1584 | } | |
ed568912 KH |
1585 | ohci->config_rom = ohci->next_config_rom; |
1586 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
1587 | ohci->next_config_rom = NULL; | |
1588 | ||
c781c06d KH |
1589 | /* |
1590 | * Restore config_rom image and manually update | |
ed568912 KH |
1591 | * config_rom registers. Writing the header quadlet |
1592 | * will indicate that the config rom is ready, so we | |
c781c06d KH |
1593 | * do that last. |
1594 | */ | |
ed568912 KH |
1595 | reg_write(ohci, OHCI1394_BusOptions, |
1596 | be32_to_cpu(ohci->config_rom[2])); | |
8e85973e SR |
1597 | ohci->config_rom[0] = ohci->next_header; |
1598 | reg_write(ohci, OHCI1394_ConfigROMhdr, | |
1599 | be32_to_cpu(ohci->next_header)); | |
ed568912 KH |
1600 | } |
1601 | ||
080de8c2 SR |
1602 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
1603 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); | |
1604 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); | |
1605 | #endif | |
1606 | ||
ed568912 KH |
1607 | spin_unlock_irqrestore(&ohci->lock, flags); |
1608 | ||
4eaff7d6 SR |
1609 | if (free_rom) |
1610 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1611 | free_rom, free_rom_bus); | |
1612 | ||
08ddb2f4 SR |
1613 | log_selfids(ohci->node_id, generation, |
1614 | self_id_count, ohci->self_id_buffer); | |
ad3c0fe8 | 1615 | |
e636fe25 | 1616 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
c8a94ded SR |
1617 | self_id_count, ohci->self_id_buffer, |
1618 | ohci->csr_state_setclear_abdicate); | |
1619 | ohci->csr_state_setclear_abdicate = false; | |
ed568912 KH |
1620 | } |
1621 | ||
1622 | static irqreturn_t irq_handler(int irq, void *data) | |
1623 | { | |
1624 | struct fw_ohci *ohci = data; | |
168cf9af | 1625 | u32 event, iso_event; |
ed568912 KH |
1626 | int i; |
1627 | ||
1628 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
1629 | ||
a515958d | 1630 | if (!event || !~event) |
ed568912 KH |
1631 | return IRQ_NONE; |
1632 | ||
a007bb85 SR |
1633 | /* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */ |
1634 | reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset); | |
ad3c0fe8 | 1635 | log_irqs(event); |
ed568912 KH |
1636 | |
1637 | if (event & OHCI1394_selfIDComplete) | |
1638 | tasklet_schedule(&ohci->bus_reset_tasklet); | |
1639 | ||
1640 | if (event & OHCI1394_RQPkt) | |
1641 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
1642 | ||
1643 | if (event & OHCI1394_RSPkt) | |
1644 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
1645 | ||
1646 | if (event & OHCI1394_reqTxComplete) | |
1647 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
1648 | ||
1649 | if (event & OHCI1394_respTxComplete) | |
1650 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
1651 | ||
c889475f | 1652 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); |
ed568912 KH |
1653 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); |
1654 | ||
1655 | while (iso_event) { | |
1656 | i = ffs(iso_event) - 1; | |
30200739 | 1657 | tasklet_schedule(&ohci->ir_context_list[i].context.tasklet); |
ed568912 KH |
1658 | iso_event &= ~(1 << i); |
1659 | } | |
1660 | ||
c889475f | 1661 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); |
ed568912 KH |
1662 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); |
1663 | ||
1664 | while (iso_event) { | |
1665 | i = ffs(iso_event) - 1; | |
30200739 | 1666 | tasklet_schedule(&ohci->it_context_list[i].context.tasklet); |
ed568912 KH |
1667 | iso_event &= ~(1 << i); |
1668 | } | |
1669 | ||
75f7832e JW |
1670 | if (unlikely(event & OHCI1394_regAccessFail)) |
1671 | fw_error("Register access failure - " | |
1672 | "please notify linux1394-devel@lists.sf.net\n"); | |
1673 | ||
e524f616 SR |
1674 | if (unlikely(event & OHCI1394_postedWriteErr)) |
1675 | fw_error("PCI posted write error\n"); | |
1676 | ||
bb9f2206 SR |
1677 | if (unlikely(event & OHCI1394_cycleTooLong)) { |
1678 | if (printk_ratelimit()) | |
1679 | fw_notify("isochronous cycle too long\n"); | |
1680 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1681 | OHCI1394_LinkControl_cycleMaster); | |
1682 | } | |
1683 | ||
5ed1f321 JF |
1684 | if (unlikely(event & OHCI1394_cycleInconsistent)) { |
1685 | /* | |
1686 | * We need to clear this event bit in order to make | |
1687 | * cycleMatch isochronous I/O work. In theory we should | |
1688 | * stop active cycleMatch iso contexts now and restart | |
1689 | * them at least two cycles later. (FIXME?) | |
1690 | */ | |
1691 | if (printk_ratelimit()) | |
1692 | fw_notify("isochronous cycle inconsistent\n"); | |
1693 | } | |
1694 | ||
a48777e0 CL |
1695 | if (event & OHCI1394_cycle64Seconds) { |
1696 | spin_lock(&ohci->lock); | |
1697 | update_bus_time(ohci); | |
1698 | spin_unlock(&ohci->lock); | |
1699 | } | |
1700 | ||
ed568912 KH |
1701 | return IRQ_HANDLED; |
1702 | } | |
1703 | ||
2aef469a KH |
1704 | static int software_reset(struct fw_ohci *ohci) |
1705 | { | |
1706 | int i; | |
1707 | ||
1708 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
1709 | ||
1710 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
1711 | if ((reg_read(ohci, OHCI1394_HCControlSet) & | |
1712 | OHCI1394_HCControl_softReset) == 0) | |
1713 | return 0; | |
1714 | msleep(1); | |
1715 | } | |
1716 | ||
1717 | return -EBUSY; | |
1718 | } | |
1719 | ||
8e85973e SR |
1720 | static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length) |
1721 | { | |
1722 | size_t size = length * 4; | |
1723 | ||
1724 | memcpy(dest, src, size); | |
1725 | if (size < CONFIG_ROM_SIZE) | |
1726 | memset(&dest[length], 0, CONFIG_ROM_SIZE - size); | |
1727 | } | |
1728 | ||
925e7a65 CL |
1729 | static int configure_1394a_enhancements(struct fw_ohci *ohci) |
1730 | { | |
1731 | bool enable_1394a; | |
35d999b1 | 1732 | int ret, clear, set, offset; |
925e7a65 CL |
1733 | |
1734 | /* Check if the driver should configure link and PHY. */ | |
1735 | if (!(reg_read(ohci, OHCI1394_HCControlSet) & | |
1736 | OHCI1394_HCControl_programPhyEnable)) | |
1737 | return 0; | |
1738 | ||
1739 | /* Paranoia: check whether the PHY supports 1394a, too. */ | |
1740 | enable_1394a = false; | |
35d999b1 SR |
1741 | ret = read_phy_reg(ohci, 2); |
1742 | if (ret < 0) | |
1743 | return ret; | |
1744 | if ((ret & PHY_EXTENDED_REGISTERS) == PHY_EXTENDED_REGISTERS) { | |
1745 | ret = read_paged_phy_reg(ohci, 1, 8); | |
1746 | if (ret < 0) | |
1747 | return ret; | |
1748 | if (ret >= 1) | |
925e7a65 CL |
1749 | enable_1394a = true; |
1750 | } | |
1751 | ||
1752 | if (ohci->quirks & QUIRK_NO_1394A) | |
1753 | enable_1394a = false; | |
1754 | ||
1755 | /* Configure PHY and link consistently. */ | |
1756 | if (enable_1394a) { | |
1757 | clear = 0; | |
1758 | set = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; | |
1759 | } else { | |
1760 | clear = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; | |
1761 | set = 0; | |
1762 | } | |
02d37bed | 1763 | ret = update_phy_reg(ohci, 5, clear, set); |
35d999b1 SR |
1764 | if (ret < 0) |
1765 | return ret; | |
925e7a65 CL |
1766 | |
1767 | if (enable_1394a) | |
1768 | offset = OHCI1394_HCControlSet; | |
1769 | else | |
1770 | offset = OHCI1394_HCControlClear; | |
1771 | reg_write(ohci, offset, OHCI1394_HCControl_aPhyEnhanceEnable); | |
1772 | ||
1773 | /* Clean up: configuration has been taken care of. */ | |
1774 | reg_write(ohci, OHCI1394_HCControlClear, | |
1775 | OHCI1394_HCControl_programPhyEnable); | |
1776 | ||
1777 | return 0; | |
1778 | } | |
1779 | ||
8e85973e SR |
1780 | static int ohci_enable(struct fw_card *card, |
1781 | const __be32 *config_rom, size_t length) | |
ed568912 KH |
1782 | { |
1783 | struct fw_ohci *ohci = fw_ohci(card); | |
1784 | struct pci_dev *dev = to_pci_dev(card->device); | |
e91b2787 | 1785 | u32 lps, seconds, version, irqs; |
35d999b1 | 1786 | int i, ret; |
ed568912 | 1787 | |
2aef469a KH |
1788 | if (software_reset(ohci)) { |
1789 | fw_error("Failed to reset ohci card.\n"); | |
1790 | return -EBUSY; | |
1791 | } | |
1792 | ||
1793 | /* | |
1794 | * Now enable LPS, which we need in order to start accessing | |
1795 | * most of the registers. In fact, on some cards (ALI M5251), | |
1796 | * accessing registers in the SClk domain without LPS enabled | |
1797 | * will lock up the machine. Wait 50msec to make sure we have | |
02214724 JW |
1798 | * full link enabled. However, with some cards (well, at least |
1799 | * a JMicron PCIe card), we have to try again sometimes. | |
2aef469a KH |
1800 | */ |
1801 | reg_write(ohci, OHCI1394_HCControlSet, | |
1802 | OHCI1394_HCControl_LPS | | |
1803 | OHCI1394_HCControl_postedWriteEnable); | |
1804 | flush_writes(ohci); | |
02214724 JW |
1805 | |
1806 | for (lps = 0, i = 0; !lps && i < 3; i++) { | |
1807 | msleep(50); | |
1808 | lps = reg_read(ohci, OHCI1394_HCControlSet) & | |
1809 | OHCI1394_HCControl_LPS; | |
1810 | } | |
1811 | ||
1812 | if (!lps) { | |
1813 | fw_error("Failed to set Link Power Status\n"); | |
1814 | return -EIO; | |
1815 | } | |
2aef469a KH |
1816 | |
1817 | reg_write(ohci, OHCI1394_HCControlClear, | |
1818 | OHCI1394_HCControl_noByteSwapData); | |
1819 | ||
affc9c24 | 1820 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); |
2aef469a KH |
1821 | reg_write(ohci, OHCI1394_LinkControlSet, |
1822 | OHCI1394_LinkControl_rcvSelfID | | |
bf54e146 | 1823 | OHCI1394_LinkControl_rcvPhyPkt | |
2aef469a KH |
1824 | OHCI1394_LinkControl_cycleTimerEnable | |
1825 | OHCI1394_LinkControl_cycleMaster); | |
1826 | ||
1827 | reg_write(ohci, OHCI1394_ATRetries, | |
1828 | OHCI1394_MAX_AT_REQ_RETRIES | | |
1829 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
27a2329f CL |
1830 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8) | |
1831 | (200 << 16)); | |
2aef469a | 1832 | |
a48777e0 CL |
1833 | seconds = lower_32_bits(get_seconds()); |
1834 | reg_write(ohci, OHCI1394_IsochronousCycleTimer, seconds << 25); | |
1835 | ohci->bus_time = seconds & ~0x3f; | |
1836 | ||
e91b2787 CL |
1837 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
1838 | if (version >= OHCI_VERSION_1_1) { | |
1839 | reg_write(ohci, OHCI1394_InitialChannelsAvailableHi, | |
1840 | 0xfffffffe); | |
db3c9cc1 | 1841 | card->broadcast_channel_auto_allocated = true; |
e91b2787 CL |
1842 | } |
1843 | ||
a1a1132b CL |
1844 | /* Get implemented bits of the priority arbitration request counter. */ |
1845 | reg_write(ohci, OHCI1394_FairnessControl, 0x3f); | |
1846 | ohci->pri_req_max = reg_read(ohci, OHCI1394_FairnessControl) & 0x3f; | |
1847 | reg_write(ohci, OHCI1394_FairnessControl, 0); | |
db3c9cc1 | 1848 | card->priority_budget_implemented = ohci->pri_req_max != 0; |
2aef469a KH |
1849 | |
1850 | ar_context_run(&ohci->ar_request_ctx); | |
1851 | ar_context_run(&ohci->ar_response_ctx); | |
1852 | ||
2aef469a KH |
1853 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); |
1854 | reg_write(ohci, OHCI1394_IntEventClear, ~0); | |
1855 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
2aef469a | 1856 | |
35d999b1 SR |
1857 | ret = configure_1394a_enhancements(ohci); |
1858 | if (ret < 0) | |
1859 | return ret; | |
925e7a65 | 1860 | |
2aef469a | 1861 | /* Activate link_on bit and contender bit in our self ID packets.*/ |
35d999b1 SR |
1862 | ret = ohci_update_phy_reg(card, 4, 0, PHY_LINK_ACTIVE | PHY_CONTENDER); |
1863 | if (ret < 0) | |
1864 | return ret; | |
2aef469a | 1865 | |
c781c06d KH |
1866 | /* |
1867 | * When the link is not yet enabled, the atomic config rom | |
ed568912 KH |
1868 | * update mechanism described below in ohci_set_config_rom() |
1869 | * is not active. We have to update ConfigRomHeader and | |
1870 | * BusOptions manually, and the write to ConfigROMmap takes | |
1871 | * effect immediately. We tie this to the enabling of the | |
1872 | * link, so we have a valid config rom before enabling - the | |
1873 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
1874 | * values before enabling. | |
1875 | * | |
1876 | * However, when the ConfigROMmap is written, some controllers | |
1877 | * always read back quadlets 0 and 2 from the config rom to | |
1878 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
1879 | * They shouldn't do that in this initial case where the link | |
1880 | * isn't enabled. This means we have to use the same | |
1881 | * workaround here, setting the bus header to 0 and then write | |
1882 | * the right values in the bus reset tasklet. | |
1883 | */ | |
1884 | ||
0bd243c4 KH |
1885 | if (config_rom) { |
1886 | ohci->next_config_rom = | |
1887 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1888 | &ohci->next_config_rom_bus, | |
1889 | GFP_KERNEL); | |
1890 | if (ohci->next_config_rom == NULL) | |
1891 | return -ENOMEM; | |
ed568912 | 1892 | |
8e85973e | 1893 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
0bd243c4 KH |
1894 | } else { |
1895 | /* | |
1896 | * In the suspend case, config_rom is NULL, which | |
1897 | * means that we just reuse the old config rom. | |
1898 | */ | |
1899 | ohci->next_config_rom = ohci->config_rom; | |
1900 | ohci->next_config_rom_bus = ohci->config_rom_bus; | |
1901 | } | |
ed568912 | 1902 | |
8e85973e | 1903 | ohci->next_header = ohci->next_config_rom[0]; |
ed568912 KH |
1904 | ohci->next_config_rom[0] = 0; |
1905 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
0bd243c4 KH |
1906 | reg_write(ohci, OHCI1394_BusOptions, |
1907 | be32_to_cpu(ohci->next_config_rom[2])); | |
ed568912 KH |
1908 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
1909 | ||
1910 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
1911 | ||
262444ee CL |
1912 | if (!(ohci->quirks & QUIRK_NO_MSI)) |
1913 | pci_enable_msi(dev); | |
ed568912 | 1914 | if (request_irq(dev->irq, irq_handler, |
262444ee CL |
1915 | pci_dev_msi_enabled(dev) ? 0 : IRQF_SHARED, |
1916 | ohci_driver_name, ohci)) { | |
1917 | fw_error("Failed to allocate interrupt %d.\n", dev->irq); | |
1918 | pci_disable_msi(dev); | |
ed568912 KH |
1919 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
1920 | ohci->config_rom, ohci->config_rom_bus); | |
1921 | return -EIO; | |
1922 | } | |
1923 | ||
148c7866 SR |
1924 | irqs = OHCI1394_reqTxComplete | OHCI1394_respTxComplete | |
1925 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
1926 | OHCI1394_isochTx | OHCI1394_isochRx | | |
1927 | OHCI1394_postedWriteErr | | |
1928 | OHCI1394_selfIDComplete | | |
1929 | OHCI1394_regAccessFail | | |
a48777e0 | 1930 | OHCI1394_cycle64Seconds | |
148c7866 SR |
1931 | OHCI1394_cycleInconsistent | OHCI1394_cycleTooLong | |
1932 | OHCI1394_masterIntEnable; | |
1933 | if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) | |
1934 | irqs |= OHCI1394_busReset; | |
1935 | reg_write(ohci, OHCI1394_IntMaskSet, irqs); | |
1936 | ||
ed568912 KH |
1937 | reg_write(ohci, OHCI1394_HCControlSet, |
1938 | OHCI1394_HCControl_linkEnable | | |
1939 | OHCI1394_HCControl_BIBimageValid); | |
1940 | flush_writes(ohci); | |
1941 | ||
02d37bed SR |
1942 | /* We are ready to go, reset bus to finish initialization. */ |
1943 | fw_schedule_bus_reset(&ohci->card, false, true); | |
ed568912 KH |
1944 | |
1945 | return 0; | |
1946 | } | |
1947 | ||
53dca511 | 1948 | static int ohci_set_config_rom(struct fw_card *card, |
8e85973e | 1949 | const __be32 *config_rom, size_t length) |
ed568912 KH |
1950 | { |
1951 | struct fw_ohci *ohci; | |
1952 | unsigned long flags; | |
2dbd7d7e | 1953 | int ret = -EBUSY; |
ed568912 | 1954 | __be32 *next_config_rom; |
f5101d58 | 1955 | dma_addr_t uninitialized_var(next_config_rom_bus); |
ed568912 KH |
1956 | |
1957 | ohci = fw_ohci(card); | |
1958 | ||
c781c06d KH |
1959 | /* |
1960 | * When the OHCI controller is enabled, the config rom update | |
ed568912 KH |
1961 | * mechanism is a bit tricky, but easy enough to use. See |
1962 | * section 5.5.6 in the OHCI specification. | |
1963 | * | |
1964 | * The OHCI controller caches the new config rom address in a | |
1965 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
1966 | * for the changes to take place. When the bus reset is | |
1967 | * detected, the controller loads the new values for the | |
1968 | * ConfigRomHeader and BusOptions registers from the specified | |
1969 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
1970 | * shadow register. All automatically and atomically. | |
1971 | * | |
1972 | * Now, there's a twist to this story. The automatic load of | |
1973 | * ConfigRomHeader and BusOptions doesn't honor the | |
1974 | * noByteSwapData bit, so with a be32 config rom, the | |
1975 | * controller will load be32 values in to these registers | |
1976 | * during the atomic update, even on litte endian | |
1977 | * architectures. The workaround we use is to put a 0 in the | |
1978 | * header quadlet; 0 is endian agnostic and means that the | |
1979 | * config rom isn't ready yet. In the bus reset tasklet we | |
1980 | * then set up the real values for the two registers. | |
1981 | * | |
1982 | * We use ohci->lock to avoid racing with the code that sets | |
1983 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). | |
1984 | */ | |
1985 | ||
1986 | next_config_rom = | |
1987 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1988 | &next_config_rom_bus, GFP_KERNEL); | |
1989 | if (next_config_rom == NULL) | |
1990 | return -ENOMEM; | |
1991 | ||
1992 | spin_lock_irqsave(&ohci->lock, flags); | |
1993 | ||
1994 | if (ohci->next_config_rom == NULL) { | |
1995 | ohci->next_config_rom = next_config_rom; | |
1996 | ohci->next_config_rom_bus = next_config_rom_bus; | |
1997 | ||
8e85973e | 1998 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
ed568912 KH |
1999 | |
2000 | ohci->next_header = config_rom[0]; | |
2001 | ohci->next_config_rom[0] = 0; | |
2002 | ||
2003 | reg_write(ohci, OHCI1394_ConfigROMmap, | |
2004 | ohci->next_config_rom_bus); | |
2dbd7d7e | 2005 | ret = 0; |
ed568912 KH |
2006 | } |
2007 | ||
2008 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2009 | ||
c781c06d KH |
2010 | /* |
2011 | * Now initiate a bus reset to have the changes take | |
ed568912 KH |
2012 | * effect. We clean up the old config rom memory and DMA |
2013 | * mappings in the bus reset tasklet, since the OHCI | |
2014 | * controller could need to access it before the bus reset | |
c781c06d KH |
2015 | * takes effect. |
2016 | */ | |
2dbd7d7e | 2017 | if (ret == 0) |
02d37bed | 2018 | fw_schedule_bus_reset(&ohci->card, true, true); |
4eaff7d6 SR |
2019 | else |
2020 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2021 | next_config_rom, next_config_rom_bus); | |
ed568912 | 2022 | |
2dbd7d7e | 2023 | return ret; |
ed568912 KH |
2024 | } |
2025 | ||
2026 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
2027 | { | |
2028 | struct fw_ohci *ohci = fw_ohci(card); | |
2029 | ||
2030 | at_context_transmit(&ohci->at_request_ctx, packet); | |
2031 | } | |
2032 | ||
2033 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
2034 | { | |
2035 | struct fw_ohci *ohci = fw_ohci(card); | |
2036 | ||
2037 | at_context_transmit(&ohci->at_response_ctx, packet); | |
2038 | } | |
2039 | ||
730c32f5 KH |
2040 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
2041 | { | |
2042 | struct fw_ohci *ohci = fw_ohci(card); | |
f319b6a0 KH |
2043 | struct context *ctx = &ohci->at_request_ctx; |
2044 | struct driver_data *driver_data = packet->driver_data; | |
2dbd7d7e | 2045 | int ret = -ENOENT; |
730c32f5 | 2046 | |
f319b6a0 | 2047 | tasklet_disable(&ctx->tasklet); |
730c32f5 | 2048 | |
f319b6a0 KH |
2049 | if (packet->ack != 0) |
2050 | goto out; | |
730c32f5 | 2051 | |
19593ffd | 2052 | if (packet->payload_mapped) |
1d1dc5e8 SR |
2053 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
2054 | packet->payload_length, DMA_TO_DEVICE); | |
2055 | ||
ad3c0fe8 | 2056 | log_ar_at_event('T', packet->speed, packet->header, 0x20); |
f319b6a0 KH |
2057 | driver_data->packet = NULL; |
2058 | packet->ack = RCODE_CANCELLED; | |
2059 | packet->callback(packet, &ohci->card, packet->ack); | |
2dbd7d7e | 2060 | ret = 0; |
f319b6a0 KH |
2061 | out: |
2062 | tasklet_enable(&ctx->tasklet); | |
730c32f5 | 2063 | |
2dbd7d7e | 2064 | return ret; |
730c32f5 KH |
2065 | } |
2066 | ||
53dca511 SR |
2067 | static int ohci_enable_phys_dma(struct fw_card *card, |
2068 | int node_id, int generation) | |
ed568912 | 2069 | { |
080de8c2 SR |
2070 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
2071 | return 0; | |
2072 | #else | |
ed568912 KH |
2073 | struct fw_ohci *ohci = fw_ohci(card); |
2074 | unsigned long flags; | |
2dbd7d7e | 2075 | int n, ret = 0; |
ed568912 | 2076 | |
c781c06d KH |
2077 | /* |
2078 | * FIXME: Make sure this bitmask is cleared when we clear the busReset | |
2079 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. | |
2080 | */ | |
ed568912 KH |
2081 | |
2082 | spin_lock_irqsave(&ohci->lock, flags); | |
2083 | ||
2084 | if (ohci->generation != generation) { | |
2dbd7d7e | 2085 | ret = -ESTALE; |
ed568912 KH |
2086 | goto out; |
2087 | } | |
2088 | ||
c781c06d KH |
2089 | /* |
2090 | * Note, if the node ID contains a non-local bus ID, physical DMA is | |
2091 | * enabled for _all_ nodes on remote buses. | |
2092 | */ | |
907293d7 SR |
2093 | |
2094 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
2095 | if (n < 32) | |
2096 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
2097 | else | |
2098 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
2099 | ||
ed568912 | 2100 | flush_writes(ohci); |
ed568912 | 2101 | out: |
6cad95fe | 2102 | spin_unlock_irqrestore(&ohci->lock, flags); |
2dbd7d7e SR |
2103 | |
2104 | return ret; | |
080de8c2 | 2105 | #endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */ |
ed568912 | 2106 | } |
373b2edd | 2107 | |
0fcff4e3 | 2108 | static u32 ohci_read_csr(struct fw_card *card, int csr_offset) |
b677532b | 2109 | { |
60d32970 | 2110 | struct fw_ohci *ohci = fw_ohci(card); |
a48777e0 CL |
2111 | unsigned long flags; |
2112 | u32 value; | |
60d32970 CL |
2113 | |
2114 | switch (csr_offset) { | |
4ffb7a6a CL |
2115 | case CSR_STATE_CLEAR: |
2116 | case CSR_STATE_SET: | |
4ffb7a6a CL |
2117 | if (ohci->is_root && |
2118 | (reg_read(ohci, OHCI1394_LinkControlSet) & | |
2119 | OHCI1394_LinkControl_cycleMaster)) | |
c8a94ded | 2120 | value = CSR_STATE_BIT_CMSTR; |
4ffb7a6a | 2121 | else |
c8a94ded SR |
2122 | value = 0; |
2123 | if (ohci->csr_state_setclear_abdicate) | |
2124 | value |= CSR_STATE_BIT_ABDICATE; | |
b677532b | 2125 | |
c8a94ded | 2126 | return value; |
4a9bde9b | 2127 | |
506f1a31 CL |
2128 | case CSR_NODE_IDS: |
2129 | return reg_read(ohci, OHCI1394_NodeID) << 16; | |
2130 | ||
60d32970 CL |
2131 | case CSR_CYCLE_TIME: |
2132 | return get_cycle_time(ohci); | |
2133 | ||
a48777e0 CL |
2134 | case CSR_BUS_TIME: |
2135 | /* | |
2136 | * We might be called just after the cycle timer has wrapped | |
2137 | * around but just before the cycle64Seconds handler, so we | |
2138 | * better check here, too, if the bus time needs to be updated. | |
2139 | */ | |
2140 | spin_lock_irqsave(&ohci->lock, flags); | |
2141 | value = update_bus_time(ohci); | |
2142 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2143 | return value; | |
2144 | ||
27a2329f CL |
2145 | case CSR_BUSY_TIMEOUT: |
2146 | value = reg_read(ohci, OHCI1394_ATRetries); | |
2147 | return (value >> 4) & 0x0ffff00f; | |
2148 | ||
a1a1132b CL |
2149 | case CSR_PRIORITY_BUDGET: |
2150 | return (reg_read(ohci, OHCI1394_FairnessControl) & 0x3f) | | |
2151 | (ohci->pri_req_max << 8); | |
2152 | ||
60d32970 CL |
2153 | default: |
2154 | WARN_ON(1); | |
2155 | return 0; | |
2156 | } | |
b677532b CL |
2157 | } |
2158 | ||
0fcff4e3 | 2159 | static void ohci_write_csr(struct fw_card *card, int csr_offset, u32 value) |
d60d7f1d KH |
2160 | { |
2161 | struct fw_ohci *ohci = fw_ohci(card); | |
a48777e0 | 2162 | unsigned long flags; |
d60d7f1d | 2163 | |
506f1a31 | 2164 | switch (csr_offset) { |
4ffb7a6a | 2165 | case CSR_STATE_CLEAR: |
4ffb7a6a CL |
2166 | if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { |
2167 | reg_write(ohci, OHCI1394_LinkControlClear, | |
2168 | OHCI1394_LinkControl_cycleMaster); | |
2169 | flush_writes(ohci); | |
2170 | } | |
c8a94ded SR |
2171 | if (value & CSR_STATE_BIT_ABDICATE) |
2172 | ohci->csr_state_setclear_abdicate = false; | |
4ffb7a6a | 2173 | break; |
4a9bde9b | 2174 | |
4ffb7a6a CL |
2175 | case CSR_STATE_SET: |
2176 | if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { | |
2177 | reg_write(ohci, OHCI1394_LinkControlSet, | |
2178 | OHCI1394_LinkControl_cycleMaster); | |
2179 | flush_writes(ohci); | |
2180 | } | |
c8a94ded SR |
2181 | if (value & CSR_STATE_BIT_ABDICATE) |
2182 | ohci->csr_state_setclear_abdicate = true; | |
4ffb7a6a | 2183 | break; |
d60d7f1d | 2184 | |
506f1a31 CL |
2185 | case CSR_NODE_IDS: |
2186 | reg_write(ohci, OHCI1394_NodeID, value >> 16); | |
2187 | flush_writes(ohci); | |
2188 | break; | |
2189 | ||
9ab5071c CL |
2190 | case CSR_CYCLE_TIME: |
2191 | reg_write(ohci, OHCI1394_IsochronousCycleTimer, value); | |
2192 | reg_write(ohci, OHCI1394_IntEventSet, | |
2193 | OHCI1394_cycleInconsistent); | |
2194 | flush_writes(ohci); | |
2195 | break; | |
2196 | ||
a48777e0 CL |
2197 | case CSR_BUS_TIME: |
2198 | spin_lock_irqsave(&ohci->lock, flags); | |
2199 | ohci->bus_time = (ohci->bus_time & 0x7f) | (value & ~0x7f); | |
2200 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2201 | break; | |
2202 | ||
27a2329f CL |
2203 | case CSR_BUSY_TIMEOUT: |
2204 | value = (value & 0xf) | ((value & 0xf) << 4) | | |
2205 | ((value & 0xf) << 8) | ((value & 0x0ffff000) << 4); | |
2206 | reg_write(ohci, OHCI1394_ATRetries, value); | |
2207 | flush_writes(ohci); | |
2208 | break; | |
2209 | ||
a1a1132b CL |
2210 | case CSR_PRIORITY_BUDGET: |
2211 | reg_write(ohci, OHCI1394_FairnessControl, value & 0x3f); | |
2212 | flush_writes(ohci); | |
2213 | break; | |
2214 | ||
506f1a31 CL |
2215 | default: |
2216 | WARN_ON(1); | |
2217 | break; | |
2218 | } | |
d60d7f1d KH |
2219 | } |
2220 | ||
1aa292bb DM |
2221 | static void copy_iso_headers(struct iso_context *ctx, void *p) |
2222 | { | |
2223 | int i = ctx->header_length; | |
2224 | ||
2225 | if (i + ctx->base.header_size > PAGE_SIZE) | |
2226 | return; | |
2227 | ||
2228 | /* | |
2229 | * The iso header is byteswapped to little endian by | |
2230 | * the controller, but the remaining header quadlets | |
2231 | * are big endian. We want to present all the headers | |
2232 | * as big endian, so we have to swap the first quadlet. | |
2233 | */ | |
2234 | if (ctx->base.header_size > 0) | |
2235 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); | |
2236 | if (ctx->base.header_size > 4) | |
2237 | *(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p); | |
2238 | if (ctx->base.header_size > 8) | |
2239 | memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8); | |
2240 | ctx->header_length += ctx->base.header_size; | |
2241 | } | |
2242 | ||
a186b4a6 JW |
2243 | static int handle_ir_packet_per_buffer(struct context *context, |
2244 | struct descriptor *d, | |
2245 | struct descriptor *last) | |
2246 | { | |
2247 | struct iso_context *ctx = | |
2248 | container_of(context, struct iso_context, context); | |
bcee893c | 2249 | struct descriptor *pd; |
a186b4a6 | 2250 | __le32 *ir_header; |
bcee893c | 2251 | void *p; |
a186b4a6 | 2252 | |
872e330e | 2253 | for (pd = d; pd <= last; pd++) |
bcee893c DM |
2254 | if (pd->transfer_status) |
2255 | break; | |
bcee893c | 2256 | if (pd > last) |
a186b4a6 JW |
2257 | /* Descriptor(s) not done yet, stop iteration */ |
2258 | return 0; | |
2259 | ||
1aa292bb DM |
2260 | p = last + 1; |
2261 | copy_iso_headers(ctx, p); | |
a186b4a6 | 2262 | |
bcee893c DM |
2263 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { |
2264 | ir_header = (__le32 *) p; | |
872e330e SR |
2265 | ctx->base.callback.sc(&ctx->base, |
2266 | le32_to_cpu(ir_header[0]) & 0xffff, | |
2267 | ctx->header_length, ctx->header, | |
2268 | ctx->base.callback_data); | |
a186b4a6 JW |
2269 | ctx->header_length = 0; |
2270 | } | |
2271 | ||
a186b4a6 JW |
2272 | return 1; |
2273 | } | |
2274 | ||
872e330e SR |
2275 | /* d == last because each descriptor block is only a single descriptor. */ |
2276 | static int handle_ir_buffer_fill(struct context *context, | |
2277 | struct descriptor *d, | |
2278 | struct descriptor *last) | |
2279 | { | |
2280 | struct iso_context *ctx = | |
2281 | container_of(context, struct iso_context, context); | |
2282 | ||
2283 | if (!last->transfer_status) | |
2284 | /* Descriptor(s) not done yet, stop iteration */ | |
2285 | return 0; | |
2286 | ||
2287 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) | |
2288 | ctx->base.callback.mc(&ctx->base, | |
2289 | le32_to_cpu(last->data_address) + | |
2290 | le16_to_cpu(last->req_count) - | |
2291 | le16_to_cpu(last->res_count), | |
2292 | ctx->base.callback_data); | |
2293 | ||
2294 | return 1; | |
2295 | } | |
2296 | ||
30200739 KH |
2297 | static int handle_it_packet(struct context *context, |
2298 | struct descriptor *d, | |
2299 | struct descriptor *last) | |
ed568912 | 2300 | { |
30200739 KH |
2301 | struct iso_context *ctx = |
2302 | container_of(context, struct iso_context, context); | |
31769cef JF |
2303 | int i; |
2304 | struct descriptor *pd; | |
373b2edd | 2305 | |
31769cef JF |
2306 | for (pd = d; pd <= last; pd++) |
2307 | if (pd->transfer_status) | |
2308 | break; | |
2309 | if (pd > last) | |
2310 | /* Descriptor(s) not done yet, stop iteration */ | |
30200739 KH |
2311 | return 0; |
2312 | ||
31769cef JF |
2313 | i = ctx->header_length; |
2314 | if (i + 4 < PAGE_SIZE) { | |
2315 | /* Present this value as big-endian to match the receive code */ | |
2316 | *(__be32 *)(ctx->header + i) = cpu_to_be32( | |
2317 | ((u32)le16_to_cpu(pd->transfer_status) << 16) | | |
2318 | le16_to_cpu(pd->res_count)); | |
2319 | ctx->header_length += 4; | |
2320 | } | |
2321 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { | |
872e330e SR |
2322 | ctx->base.callback.sc(&ctx->base, le16_to_cpu(last->res_count), |
2323 | ctx->header_length, ctx->header, | |
2324 | ctx->base.callback_data); | |
31769cef JF |
2325 | ctx->header_length = 0; |
2326 | } | |
30200739 | 2327 | return 1; |
ed568912 KH |
2328 | } |
2329 | ||
872e330e SR |
2330 | static void set_multichannel_mask(struct fw_ohci *ohci, u64 channels) |
2331 | { | |
2332 | u32 hi = channels >> 32, lo = channels; | |
2333 | ||
2334 | reg_write(ohci, OHCI1394_IRMultiChanMaskHiClear, ~hi); | |
2335 | reg_write(ohci, OHCI1394_IRMultiChanMaskLoClear, ~lo); | |
2336 | reg_write(ohci, OHCI1394_IRMultiChanMaskHiSet, hi); | |
2337 | reg_write(ohci, OHCI1394_IRMultiChanMaskLoSet, lo); | |
2338 | mmiowb(); | |
2339 | ohci->mc_channels = channels; | |
2340 | } | |
2341 | ||
53dca511 | 2342 | static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, |
4817ed24 | 2343 | int type, int channel, size_t header_size) |
ed568912 KH |
2344 | { |
2345 | struct fw_ohci *ohci = fw_ohci(card); | |
872e330e SR |
2346 | struct iso_context *uninitialized_var(ctx); |
2347 | descriptor_callback_t uninitialized_var(callback); | |
2348 | u64 *uninitialized_var(channels); | |
2349 | u32 *uninitialized_var(mask), uninitialized_var(regs); | |
ed568912 | 2350 | unsigned long flags; |
872e330e | 2351 | int index, ret = -EBUSY; |
ed568912 | 2352 | |
872e330e | 2353 | spin_lock_irqsave(&ohci->lock, flags); |
ed568912 | 2354 | |
872e330e SR |
2355 | switch (type) { |
2356 | case FW_ISO_CONTEXT_TRANSMIT: | |
2357 | mask = &ohci->it_context_mask; | |
30200739 | 2358 | callback = handle_it_packet; |
872e330e SR |
2359 | index = ffs(*mask) - 1; |
2360 | if (index >= 0) { | |
2361 | *mask &= ~(1 << index); | |
2362 | regs = OHCI1394_IsoXmitContextBase(index); | |
2363 | ctx = &ohci->it_context_list[index]; | |
2364 | } | |
2365 | break; | |
2366 | ||
2367 | case FW_ISO_CONTEXT_RECEIVE: | |
4817ed24 | 2368 | channels = &ohci->ir_context_channels; |
872e330e | 2369 | mask = &ohci->ir_context_mask; |
6498ba04 | 2370 | callback = handle_ir_packet_per_buffer; |
872e330e SR |
2371 | index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1; |
2372 | if (index >= 0) { | |
2373 | *channels &= ~(1ULL << channel); | |
2374 | *mask &= ~(1 << index); | |
2375 | regs = OHCI1394_IsoRcvContextBase(index); | |
2376 | ctx = &ohci->ir_context_list[index]; | |
2377 | } | |
2378 | break; | |
ed568912 | 2379 | |
872e330e SR |
2380 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: |
2381 | mask = &ohci->ir_context_mask; | |
2382 | callback = handle_ir_buffer_fill; | |
2383 | index = !ohci->mc_allocated ? ffs(*mask) - 1 : -1; | |
2384 | if (index >= 0) { | |
2385 | ohci->mc_allocated = true; | |
2386 | *mask &= ~(1 << index); | |
2387 | regs = OHCI1394_IsoRcvContextBase(index); | |
2388 | ctx = &ohci->ir_context_list[index]; | |
2389 | } | |
2390 | break; | |
2391 | ||
2392 | default: | |
2393 | index = -1; | |
2394 | ret = -ENOSYS; | |
4817ed24 | 2395 | } |
872e330e | 2396 | |
ed568912 KH |
2397 | spin_unlock_irqrestore(&ohci->lock, flags); |
2398 | ||
2399 | if (index < 0) | |
872e330e | 2400 | return ERR_PTR(ret); |
373b2edd | 2401 | |
2d826cc5 | 2402 | memset(ctx, 0, sizeof(*ctx)); |
9b32d5f3 KH |
2403 | ctx->header_length = 0; |
2404 | ctx->header = (void *) __get_free_page(GFP_KERNEL); | |
872e330e SR |
2405 | if (ctx->header == NULL) { |
2406 | ret = -ENOMEM; | |
9b32d5f3 | 2407 | goto out; |
872e330e | 2408 | } |
2dbd7d7e SR |
2409 | ret = context_init(&ctx->context, ohci, regs, callback); |
2410 | if (ret < 0) | |
9b32d5f3 | 2411 | goto out_with_header; |
ed568912 | 2412 | |
872e330e SR |
2413 | if (type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) |
2414 | set_multichannel_mask(ohci, 0); | |
2415 | ||
ed568912 | 2416 | return &ctx->base; |
9b32d5f3 KH |
2417 | |
2418 | out_with_header: | |
2419 | free_page((unsigned long)ctx->header); | |
2420 | out: | |
2421 | spin_lock_irqsave(&ohci->lock, flags); | |
872e330e SR |
2422 | |
2423 | switch (type) { | |
2424 | case FW_ISO_CONTEXT_RECEIVE: | |
2425 | *channels |= 1ULL << channel; | |
2426 | break; | |
2427 | ||
2428 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2429 | ohci->mc_allocated = false; | |
2430 | break; | |
2431 | } | |
9b32d5f3 | 2432 | *mask |= 1 << index; |
872e330e | 2433 | |
9b32d5f3 KH |
2434 | spin_unlock_irqrestore(&ohci->lock, flags); |
2435 | ||
2dbd7d7e | 2436 | return ERR_PTR(ret); |
ed568912 KH |
2437 | } |
2438 | ||
eb0306ea KH |
2439 | static int ohci_start_iso(struct fw_iso_context *base, |
2440 | s32 cycle, u32 sync, u32 tags) | |
ed568912 | 2441 | { |
373b2edd | 2442 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 2443 | struct fw_ohci *ohci = ctx->context.ohci; |
872e330e | 2444 | u32 control = IR_CONTEXT_ISOCH_HEADER, match; |
ed568912 KH |
2445 | int index; |
2446 | ||
872e330e SR |
2447 | switch (ctx->base.type) { |
2448 | case FW_ISO_CONTEXT_TRANSMIT: | |
295e3feb | 2449 | index = ctx - ohci->it_context_list; |
8a2f7d93 KH |
2450 | match = 0; |
2451 | if (cycle >= 0) | |
2452 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | | |
295e3feb | 2453 | (cycle & 0x7fff) << 16; |
21efb3cf | 2454 | |
295e3feb KH |
2455 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
2456 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
8a2f7d93 | 2457 | context_run(&ctx->context, match); |
872e330e SR |
2458 | break; |
2459 | ||
2460 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2461 | control |= IR_CONTEXT_BUFFER_FILL|IR_CONTEXT_MULTI_CHANNEL_MODE; | |
2462 | /* fall through */ | |
2463 | case FW_ISO_CONTEXT_RECEIVE: | |
295e3feb | 2464 | index = ctx - ohci->ir_context_list; |
8a2f7d93 KH |
2465 | match = (tags << 28) | (sync << 8) | ctx->base.channel; |
2466 | if (cycle >= 0) { | |
2467 | match |= (cycle & 0x07fff) << 12; | |
2468 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; | |
2469 | } | |
ed568912 | 2470 | |
295e3feb KH |
2471 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
2472 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); | |
a77754a7 | 2473 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
8a2f7d93 | 2474 | context_run(&ctx->context, control); |
872e330e | 2475 | break; |
295e3feb | 2476 | } |
ed568912 KH |
2477 | |
2478 | return 0; | |
2479 | } | |
2480 | ||
b8295668 KH |
2481 | static int ohci_stop_iso(struct fw_iso_context *base) |
2482 | { | |
2483 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2484 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
b8295668 KH |
2485 | int index; |
2486 | ||
872e330e SR |
2487 | switch (ctx->base.type) { |
2488 | case FW_ISO_CONTEXT_TRANSMIT: | |
b8295668 KH |
2489 | index = ctx - ohci->it_context_list; |
2490 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
872e330e SR |
2491 | break; |
2492 | ||
2493 | case FW_ISO_CONTEXT_RECEIVE: | |
2494 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
b8295668 KH |
2495 | index = ctx - ohci->ir_context_list; |
2496 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
872e330e | 2497 | break; |
b8295668 KH |
2498 | } |
2499 | flush_writes(ohci); | |
2500 | context_stop(&ctx->context); | |
2501 | ||
2502 | return 0; | |
2503 | } | |
2504 | ||
ed568912 KH |
2505 | static void ohci_free_iso_context(struct fw_iso_context *base) |
2506 | { | |
2507 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2508 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
ed568912 KH |
2509 | unsigned long flags; |
2510 | int index; | |
2511 | ||
b8295668 KH |
2512 | ohci_stop_iso(base); |
2513 | context_release(&ctx->context); | |
9b32d5f3 | 2514 | free_page((unsigned long)ctx->header); |
b8295668 | 2515 | |
ed568912 KH |
2516 | spin_lock_irqsave(&ohci->lock, flags); |
2517 | ||
872e330e SR |
2518 | switch (base->type) { |
2519 | case FW_ISO_CONTEXT_TRANSMIT: | |
ed568912 | 2520 | index = ctx - ohci->it_context_list; |
ed568912 | 2521 | ohci->it_context_mask |= 1 << index; |
872e330e SR |
2522 | break; |
2523 | ||
2524 | case FW_ISO_CONTEXT_RECEIVE: | |
ed568912 | 2525 | index = ctx - ohci->ir_context_list; |
ed568912 | 2526 | ohci->ir_context_mask |= 1 << index; |
4817ed24 | 2527 | ohci->ir_context_channels |= 1ULL << base->channel; |
872e330e SR |
2528 | break; |
2529 | ||
2530 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2531 | index = ctx - ohci->ir_context_list; | |
2532 | ohci->ir_context_mask |= 1 << index; | |
2533 | ohci->ir_context_channels |= ohci->mc_channels; | |
2534 | ohci->mc_channels = 0; | |
2535 | ohci->mc_allocated = false; | |
2536 | break; | |
ed568912 | 2537 | } |
ed568912 KH |
2538 | |
2539 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2540 | } | |
2541 | ||
872e330e SR |
2542 | static int ohci_set_iso_channels(struct fw_iso_context *base, u64 *channels) |
2543 | { | |
2544 | struct fw_ohci *ohci = fw_ohci(base->card); | |
2545 | unsigned long flags; | |
2546 | int ret; | |
2547 | ||
2548 | switch (base->type) { | |
2549 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2550 | ||
2551 | spin_lock_irqsave(&ohci->lock, flags); | |
2552 | ||
2553 | /* Don't allow multichannel to grab other contexts' channels. */ | |
2554 | if (~ohci->ir_context_channels & ~ohci->mc_channels & *channels) { | |
2555 | *channels = ohci->ir_context_channels; | |
2556 | ret = -EBUSY; | |
2557 | } else { | |
2558 | set_multichannel_mask(ohci, *channels); | |
2559 | ret = 0; | |
2560 | } | |
2561 | ||
2562 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2563 | ||
2564 | break; | |
2565 | default: | |
2566 | ret = -EINVAL; | |
2567 | } | |
2568 | ||
2569 | return ret; | |
2570 | } | |
2571 | ||
2572 | static int queue_iso_transmit(struct iso_context *ctx, | |
2573 | struct fw_iso_packet *packet, | |
2574 | struct fw_iso_buffer *buffer, | |
2575 | unsigned long payload) | |
ed568912 | 2576 | { |
30200739 | 2577 | struct descriptor *d, *last, *pd; |
ed568912 KH |
2578 | struct fw_iso_packet *p; |
2579 | __le32 *header; | |
9aad8125 | 2580 | dma_addr_t d_bus, page_bus; |
ed568912 KH |
2581 | u32 z, header_z, payload_z, irq; |
2582 | u32 payload_index, payload_end_index, next_page_index; | |
30200739 | 2583 | int page, end_page, i, length, offset; |
ed568912 | 2584 | |
ed568912 | 2585 | p = packet; |
9aad8125 | 2586 | payload_index = payload; |
ed568912 KH |
2587 | |
2588 | if (p->skip) | |
2589 | z = 1; | |
2590 | else | |
2591 | z = 2; | |
2592 | if (p->header_length > 0) | |
2593 | z++; | |
2594 | ||
2595 | /* Determine the first page the payload isn't contained in. */ | |
2596 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
2597 | if (p->payload_length > 0) | |
2598 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
2599 | else | |
2600 | payload_z = 0; | |
2601 | ||
2602 | z += payload_z; | |
2603 | ||
2604 | /* Get header size in number of descriptors. */ | |
2d826cc5 | 2605 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
ed568912 | 2606 | |
30200739 KH |
2607 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
2608 | if (d == NULL) | |
2609 | return -ENOMEM; | |
ed568912 KH |
2610 | |
2611 | if (!p->skip) { | |
a77754a7 | 2612 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
ed568912 | 2613 | d[0].req_count = cpu_to_le16(8); |
7f51a100 CL |
2614 | /* |
2615 | * Link the skip address to this descriptor itself. This causes | |
2616 | * a context to skip a cycle whenever lost cycles or FIFO | |
2617 | * overruns occur, without dropping the data. The application | |
2618 | * should then decide whether this is an error condition or not. | |
2619 | * FIXME: Make the context's cycle-lost behaviour configurable? | |
2620 | */ | |
2621 | d[0].branch_address = cpu_to_le32(d_bus | z); | |
ed568912 KH |
2622 | |
2623 | header = (__le32 *) &d[1]; | |
a77754a7 KH |
2624 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
2625 | IT_HEADER_TAG(p->tag) | | |
2626 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | | |
2627 | IT_HEADER_CHANNEL(ctx->base.channel) | | |
2628 | IT_HEADER_SPEED(ctx->base.speed)); | |
ed568912 | 2629 | header[1] = |
a77754a7 | 2630 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
ed568912 KH |
2631 | p->payload_length)); |
2632 | } | |
2633 | ||
2634 | if (p->header_length > 0) { | |
2635 | d[2].req_count = cpu_to_le16(p->header_length); | |
2d826cc5 | 2636 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
ed568912 KH |
2637 | memcpy(&d[z], p->header, p->header_length); |
2638 | } | |
2639 | ||
2640 | pd = d + z - payload_z; | |
2641 | payload_end_index = payload_index + p->payload_length; | |
2642 | for (i = 0; i < payload_z; i++) { | |
2643 | page = payload_index >> PAGE_SHIFT; | |
2644 | offset = payload_index & ~PAGE_MASK; | |
2645 | next_page_index = (page + 1) << PAGE_SHIFT; | |
2646 | length = | |
2647 | min(next_page_index, payload_end_index) - payload_index; | |
2648 | pd[i].req_count = cpu_to_le16(length); | |
9aad8125 KH |
2649 | |
2650 | page_bus = page_private(buffer->pages[page]); | |
2651 | pd[i].data_address = cpu_to_le32(page_bus + offset); | |
ed568912 KH |
2652 | |
2653 | payload_index += length; | |
2654 | } | |
2655 | ||
ed568912 | 2656 | if (p->interrupt) |
a77754a7 | 2657 | irq = DESCRIPTOR_IRQ_ALWAYS; |
ed568912 | 2658 | else |
a77754a7 | 2659 | irq = DESCRIPTOR_NO_IRQ; |
ed568912 | 2660 | |
30200739 | 2661 | last = z == 2 ? d : d + z - 1; |
a77754a7 KH |
2662 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
2663 | DESCRIPTOR_STATUS | | |
2664 | DESCRIPTOR_BRANCH_ALWAYS | | |
cbb59da7 | 2665 | irq); |
ed568912 | 2666 | |
30200739 | 2667 | context_append(&ctx->context, d, z, header_z); |
ed568912 KH |
2668 | |
2669 | return 0; | |
2670 | } | |
373b2edd | 2671 | |
872e330e SR |
2672 | static int queue_iso_packet_per_buffer(struct iso_context *ctx, |
2673 | struct fw_iso_packet *packet, | |
2674 | struct fw_iso_buffer *buffer, | |
2675 | unsigned long payload) | |
a186b4a6 | 2676 | { |
8c0c0cc2 | 2677 | struct descriptor *d, *pd; |
a186b4a6 JW |
2678 | dma_addr_t d_bus, page_bus; |
2679 | u32 z, header_z, rest; | |
bcee893c DM |
2680 | int i, j, length; |
2681 | int page, offset, packet_count, header_size, payload_per_buffer; | |
a186b4a6 JW |
2682 | |
2683 | /* | |
1aa292bb DM |
2684 | * The OHCI controller puts the isochronous header and trailer in the |
2685 | * buffer, so we need at least 8 bytes. | |
a186b4a6 | 2686 | */ |
872e330e | 2687 | packet_count = packet->header_length / ctx->base.header_size; |
1aa292bb | 2688 | header_size = max(ctx->base.header_size, (size_t)8); |
a186b4a6 JW |
2689 | |
2690 | /* Get header size in number of descriptors. */ | |
2691 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); | |
2692 | page = payload >> PAGE_SHIFT; | |
2693 | offset = payload & ~PAGE_MASK; | |
872e330e | 2694 | payload_per_buffer = packet->payload_length / packet_count; |
a186b4a6 JW |
2695 | |
2696 | for (i = 0; i < packet_count; i++) { | |
2697 | /* d points to the header descriptor */ | |
bcee893c | 2698 | z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1; |
a186b4a6 | 2699 | d = context_get_descriptors(&ctx->context, |
bcee893c | 2700 | z + header_z, &d_bus); |
a186b4a6 JW |
2701 | if (d == NULL) |
2702 | return -ENOMEM; | |
2703 | ||
bcee893c DM |
2704 | d->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2705 | DESCRIPTOR_INPUT_MORE); | |
872e330e | 2706 | if (packet->skip && i == 0) |
bcee893c | 2707 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); |
a186b4a6 JW |
2708 | d->req_count = cpu_to_le16(header_size); |
2709 | d->res_count = d->req_count; | |
bcee893c | 2710 | d->transfer_status = 0; |
a186b4a6 JW |
2711 | d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d))); |
2712 | ||
bcee893c | 2713 | rest = payload_per_buffer; |
8c0c0cc2 | 2714 | pd = d; |
bcee893c | 2715 | for (j = 1; j < z; j++) { |
8c0c0cc2 | 2716 | pd++; |
bcee893c DM |
2717 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2718 | DESCRIPTOR_INPUT_MORE); | |
2719 | ||
2720 | if (offset + rest < PAGE_SIZE) | |
2721 | length = rest; | |
2722 | else | |
2723 | length = PAGE_SIZE - offset; | |
2724 | pd->req_count = cpu_to_le16(length); | |
2725 | pd->res_count = pd->req_count; | |
2726 | pd->transfer_status = 0; | |
2727 | ||
2728 | page_bus = page_private(buffer->pages[page]); | |
2729 | pd->data_address = cpu_to_le32(page_bus + offset); | |
2730 | ||
2731 | offset = (offset + length) & ~PAGE_MASK; | |
2732 | rest -= length; | |
2733 | if (offset == 0) | |
2734 | page++; | |
2735 | } | |
a186b4a6 JW |
2736 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2737 | DESCRIPTOR_INPUT_LAST | | |
2738 | DESCRIPTOR_BRANCH_ALWAYS); | |
872e330e | 2739 | if (packet->interrupt && i == packet_count - 1) |
a186b4a6 JW |
2740 | pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
2741 | ||
a186b4a6 JW |
2742 | context_append(&ctx->context, d, z, header_z); |
2743 | } | |
2744 | ||
2745 | return 0; | |
2746 | } | |
2747 | ||
872e330e SR |
2748 | static int queue_iso_buffer_fill(struct iso_context *ctx, |
2749 | struct fw_iso_packet *packet, | |
2750 | struct fw_iso_buffer *buffer, | |
2751 | unsigned long payload) | |
2752 | { | |
2753 | struct descriptor *d; | |
2754 | dma_addr_t d_bus, page_bus; | |
2755 | int page, offset, rest, z, i, length; | |
2756 | ||
2757 | page = payload >> PAGE_SHIFT; | |
2758 | offset = payload & ~PAGE_MASK; | |
2759 | rest = packet->payload_length; | |
2760 | ||
2761 | /* We need one descriptor for each page in the buffer. */ | |
2762 | z = DIV_ROUND_UP(offset + rest, PAGE_SIZE); | |
2763 | ||
2764 | if (WARN_ON(offset & 3 || rest & 3 || page + z > buffer->page_count)) | |
2765 | return -EFAULT; | |
2766 | ||
2767 | for (i = 0; i < z; i++) { | |
2768 | d = context_get_descriptors(&ctx->context, 1, &d_bus); | |
2769 | if (d == NULL) | |
2770 | return -ENOMEM; | |
2771 | ||
2772 | d->control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | | |
2773 | DESCRIPTOR_BRANCH_ALWAYS); | |
2774 | if (packet->skip && i == 0) | |
2775 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
2776 | if (packet->interrupt && i == z - 1) | |
2777 | d->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); | |
2778 | ||
2779 | if (offset + rest < PAGE_SIZE) | |
2780 | length = rest; | |
2781 | else | |
2782 | length = PAGE_SIZE - offset; | |
2783 | d->req_count = cpu_to_le16(length); | |
2784 | d->res_count = d->req_count; | |
2785 | d->transfer_status = 0; | |
2786 | ||
2787 | page_bus = page_private(buffer->pages[page]); | |
2788 | d->data_address = cpu_to_le32(page_bus + offset); | |
2789 | ||
2790 | rest -= length; | |
2791 | offset = 0; | |
2792 | page++; | |
2793 | ||
2794 | context_append(&ctx->context, d, 1, 0); | |
2795 | } | |
2796 | ||
2797 | return 0; | |
2798 | } | |
2799 | ||
53dca511 SR |
2800 | static int ohci_queue_iso(struct fw_iso_context *base, |
2801 | struct fw_iso_packet *packet, | |
2802 | struct fw_iso_buffer *buffer, | |
2803 | unsigned long payload) | |
295e3feb | 2804 | { |
e364cf4e | 2805 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
fe5ca634 | 2806 | unsigned long flags; |
872e330e | 2807 | int ret = -ENOSYS; |
e364cf4e | 2808 | |
fe5ca634 | 2809 | spin_lock_irqsave(&ctx->context.ohci->lock, flags); |
872e330e SR |
2810 | switch (base->type) { |
2811 | case FW_ISO_CONTEXT_TRANSMIT: | |
2812 | ret = queue_iso_transmit(ctx, packet, buffer, payload); | |
2813 | break; | |
2814 | case FW_ISO_CONTEXT_RECEIVE: | |
2815 | ret = queue_iso_packet_per_buffer(ctx, packet, buffer, payload); | |
2816 | break; | |
2817 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2818 | ret = queue_iso_buffer_fill(ctx, packet, buffer, payload); | |
2819 | break; | |
2820 | } | |
fe5ca634 DM |
2821 | spin_unlock_irqrestore(&ctx->context.ohci->lock, flags); |
2822 | ||
2dbd7d7e | 2823 | return ret; |
295e3feb KH |
2824 | } |
2825 | ||
21ebcd12 | 2826 | static const struct fw_card_driver ohci_driver = { |
ed568912 | 2827 | .enable = ohci_enable, |
02d37bed | 2828 | .read_phy_reg = ohci_read_phy_reg, |
ed568912 KH |
2829 | .update_phy_reg = ohci_update_phy_reg, |
2830 | .set_config_rom = ohci_set_config_rom, | |
2831 | .send_request = ohci_send_request, | |
2832 | .send_response = ohci_send_response, | |
730c32f5 | 2833 | .cancel_packet = ohci_cancel_packet, |
ed568912 | 2834 | .enable_phys_dma = ohci_enable_phys_dma, |
0fcff4e3 SR |
2835 | .read_csr = ohci_read_csr, |
2836 | .write_csr = ohci_write_csr, | |
ed568912 KH |
2837 | |
2838 | .allocate_iso_context = ohci_allocate_iso_context, | |
2839 | .free_iso_context = ohci_free_iso_context, | |
872e330e | 2840 | .set_iso_channels = ohci_set_iso_channels, |
ed568912 | 2841 | .queue_iso = ohci_queue_iso, |
69cdb726 | 2842 | .start_iso = ohci_start_iso, |
b8295668 | 2843 | .stop_iso = ohci_stop_iso, |
ed568912 KH |
2844 | }; |
2845 | ||
ea8d006b | 2846 | #ifdef CONFIG_PPC_PMAC |
5da3dac8 | 2847 | static void pmac_ohci_on(struct pci_dev *dev) |
2ed0f181 | 2848 | { |
ea8d006b SR |
2849 | if (machine_is(powermac)) { |
2850 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2851 | ||
2852 | if (ofn) { | |
2853 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); | |
2854 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
2855 | } | |
2856 | } | |
2ed0f181 SR |
2857 | } |
2858 | ||
5da3dac8 | 2859 | static void pmac_ohci_off(struct pci_dev *dev) |
2ed0f181 SR |
2860 | { |
2861 | if (machine_is(powermac)) { | |
2862 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2863 | ||
2864 | if (ofn) { | |
2865 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
2866 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); | |
2867 | } | |
2868 | } | |
2869 | } | |
2870 | #else | |
5da3dac8 SR |
2871 | static inline void pmac_ohci_on(struct pci_dev *dev) {} |
2872 | static inline void pmac_ohci_off(struct pci_dev *dev) {} | |
ea8d006b SR |
2873 | #endif /* CONFIG_PPC_PMAC */ |
2874 | ||
53dca511 SR |
2875 | static int __devinit pci_probe(struct pci_dev *dev, |
2876 | const struct pci_device_id *ent) | |
2ed0f181 SR |
2877 | { |
2878 | struct fw_ohci *ohci; | |
aa0170ff | 2879 | u32 bus_options, max_receive, link_speed, version; |
2ed0f181 | 2880 | u64 guid; |
6fdb2ee2 | 2881 | int i, err, n_ir, n_it; |
2ed0f181 SR |
2882 | size_t size; |
2883 | ||
2d826cc5 | 2884 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
ed568912 | 2885 | if (ohci == NULL) { |
7007a076 SR |
2886 | err = -ENOMEM; |
2887 | goto fail; | |
ed568912 KH |
2888 | } |
2889 | ||
2890 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
2891 | ||
5da3dac8 | 2892 | pmac_ohci_on(dev); |
130d5496 | 2893 | |
d79406dd KH |
2894 | err = pci_enable_device(dev); |
2895 | if (err) { | |
7007a076 | 2896 | fw_error("Failed to enable OHCI hardware\n"); |
bd7dee63 | 2897 | goto fail_free; |
ed568912 KH |
2898 | } |
2899 | ||
2900 | pci_set_master(dev); | |
2901 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
2902 | pci_set_drvdata(dev, ohci); | |
2903 | ||
2904 | spin_lock_init(&ohci->lock); | |
02d37bed | 2905 | mutex_init(&ohci->phy_reg_mutex); |
ed568912 KH |
2906 | |
2907 | tasklet_init(&ohci->bus_reset_tasklet, | |
2908 | bus_reset_tasklet, (unsigned long)ohci); | |
2909 | ||
d79406dd KH |
2910 | err = pci_request_region(dev, 0, ohci_driver_name); |
2911 | if (err) { | |
ed568912 | 2912 | fw_error("MMIO resource unavailable\n"); |
d79406dd | 2913 | goto fail_disable; |
ed568912 KH |
2914 | } |
2915 | ||
2916 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
2917 | if (ohci->registers == NULL) { | |
2918 | fw_error("Failed to remap registers\n"); | |
d79406dd KH |
2919 | err = -ENXIO; |
2920 | goto fail_iomem; | |
ed568912 KH |
2921 | } |
2922 | ||
4a635593 SR |
2923 | for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++) |
2924 | if (ohci_quirks[i].vendor == dev->vendor && | |
2925 | (ohci_quirks[i].device == dev->device || | |
2926 | ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) { | |
2927 | ohci->quirks = ohci_quirks[i].flags; | |
2928 | break; | |
2929 | } | |
3e9cc2f3 SR |
2930 | if (param_quirks) |
2931 | ohci->quirks = param_quirks; | |
b677532b | 2932 | |
ed568912 KH |
2933 | ar_context_init(&ohci->ar_request_ctx, ohci, |
2934 | OHCI1394_AsReqRcvContextControlSet); | |
2935 | ||
2936 | ar_context_init(&ohci->ar_response_ctx, ohci, | |
2937 | OHCI1394_AsRspRcvContextControlSet); | |
2938 | ||
fe5ca634 | 2939 | context_init(&ohci->at_request_ctx, ohci, |
f319b6a0 | 2940 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); |
ed568912 | 2941 | |
fe5ca634 | 2942 | context_init(&ohci->at_response_ctx, ohci, |
f319b6a0 | 2943 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); |
ed568912 | 2944 | |
ed568912 | 2945 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
4802f16d SR |
2946 | ohci->ir_context_channels = ~0ULL; |
2947 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); | |
ed568912 | 2948 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); |
6fdb2ee2 SR |
2949 | n_ir = hweight32(ohci->ir_context_mask); |
2950 | size = sizeof(struct iso_context) * n_ir; | |
4802f16d | 2951 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
2952 | |
2953 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
4802f16d | 2954 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); |
ed568912 | 2955 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); |
6fdb2ee2 SR |
2956 | n_it = hweight32(ohci->it_context_mask); |
2957 | size = sizeof(struct iso_context) * n_it; | |
4802f16d | 2958 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
2959 | |
2960 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
d79406dd | 2961 | err = -ENOMEM; |
7007a076 | 2962 | goto fail_contexts; |
ed568912 KH |
2963 | } |
2964 | ||
2965 | /* self-id dma buffer allocation */ | |
2966 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, | |
2967 | SELF_ID_BUF_SIZE, | |
2968 | &ohci->self_id_bus, | |
2969 | GFP_KERNEL); | |
2970 | if (ohci->self_id_cpu == NULL) { | |
d79406dd | 2971 | err = -ENOMEM; |
7007a076 | 2972 | goto fail_contexts; |
ed568912 KH |
2973 | } |
2974 | ||
ed568912 KH |
2975 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
2976 | max_receive = (bus_options >> 12) & 0xf; | |
2977 | link_speed = bus_options & 0x7; | |
2978 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
2979 | reg_read(ohci, OHCI1394_GUIDLo); | |
2980 | ||
d79406dd | 2981 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
e1eff7a3 | 2982 | if (err) |
d79406dd | 2983 | goto fail_self_id; |
ed568912 | 2984 | |
6fdb2ee2 SR |
2985 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
2986 | fw_notify("Added fw-ohci device %s, OHCI v%x.%x, " | |
2987 | "%d IR + %d IT contexts, quirks 0x%x\n", | |
2988 | dev_name(&dev->dev), version >> 16, version & 0xff, | |
2989 | n_ir, n_it, ohci->quirks); | |
e1eff7a3 | 2990 | |
ed568912 | 2991 | return 0; |
d79406dd KH |
2992 | |
2993 | fail_self_id: | |
2994 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, | |
2995 | ohci->self_id_cpu, ohci->self_id_bus); | |
7007a076 | 2996 | fail_contexts: |
d79406dd | 2997 | kfree(ohci->ir_context_list); |
7007a076 SR |
2998 | kfree(ohci->it_context_list); |
2999 | context_release(&ohci->at_response_ctx); | |
3000 | context_release(&ohci->at_request_ctx); | |
3001 | ar_context_release(&ohci->ar_response_ctx); | |
3002 | ar_context_release(&ohci->ar_request_ctx); | |
d79406dd KH |
3003 | pci_iounmap(dev, ohci->registers); |
3004 | fail_iomem: | |
3005 | pci_release_region(dev, 0); | |
3006 | fail_disable: | |
3007 | pci_disable_device(dev); | |
bd7dee63 SR |
3008 | fail_free: |
3009 | kfree(&ohci->card); | |
5da3dac8 | 3010 | pmac_ohci_off(dev); |
7007a076 SR |
3011 | fail: |
3012 | if (err == -ENOMEM) | |
3013 | fw_error("Out of memory\n"); | |
d79406dd KH |
3014 | |
3015 | return err; | |
ed568912 KH |
3016 | } |
3017 | ||
3018 | static void pci_remove(struct pci_dev *dev) | |
3019 | { | |
3020 | struct fw_ohci *ohci; | |
3021 | ||
3022 | ohci = pci_get_drvdata(dev); | |
e254a4b4 KH |
3023 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
3024 | flush_writes(ohci); | |
ed568912 KH |
3025 | fw_core_remove_card(&ohci->card); |
3026 | ||
c781c06d KH |
3027 | /* |
3028 | * FIXME: Fail all pending packets here, now that the upper | |
3029 | * layers can't queue any more. | |
3030 | */ | |
ed568912 KH |
3031 | |
3032 | software_reset(ohci); | |
3033 | free_irq(dev->irq, ohci); | |
a55709ba JF |
3034 | |
3035 | if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom) | |
3036 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
3037 | ohci->next_config_rom, ohci->next_config_rom_bus); | |
3038 | if (ohci->config_rom) | |
3039 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
3040 | ohci->config_rom, ohci->config_rom_bus); | |
d79406dd KH |
3041 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
3042 | ohci->self_id_cpu, ohci->self_id_bus); | |
a55709ba JF |
3043 | ar_context_release(&ohci->ar_request_ctx); |
3044 | ar_context_release(&ohci->ar_response_ctx); | |
3045 | context_release(&ohci->at_request_ctx); | |
3046 | context_release(&ohci->at_response_ctx); | |
d79406dd KH |
3047 | kfree(ohci->it_context_list); |
3048 | kfree(ohci->ir_context_list); | |
262444ee | 3049 | pci_disable_msi(dev); |
d79406dd KH |
3050 | pci_iounmap(dev, ohci->registers); |
3051 | pci_release_region(dev, 0); | |
3052 | pci_disable_device(dev); | |
bd7dee63 | 3053 | kfree(&ohci->card); |
5da3dac8 | 3054 | pmac_ohci_off(dev); |
ea8d006b | 3055 | |
ed568912 KH |
3056 | fw_notify("Removed fw-ohci device.\n"); |
3057 | } | |
3058 | ||
2aef469a | 3059 | #ifdef CONFIG_PM |
2ed0f181 | 3060 | static int pci_suspend(struct pci_dev *dev, pm_message_t state) |
2aef469a | 3061 | { |
2ed0f181 | 3062 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
3063 | int err; |
3064 | ||
3065 | software_reset(ohci); | |
2ed0f181 | 3066 | free_irq(dev->irq, ohci); |
262444ee | 3067 | pci_disable_msi(dev); |
2ed0f181 | 3068 | err = pci_save_state(dev); |
2aef469a | 3069 | if (err) { |
8a8cea27 | 3070 | fw_error("pci_save_state failed\n"); |
2aef469a KH |
3071 | return err; |
3072 | } | |
2ed0f181 | 3073 | err = pci_set_power_state(dev, pci_choose_state(dev, state)); |
55111428 SR |
3074 | if (err) |
3075 | fw_error("pci_set_power_state failed with %d\n", err); | |
5da3dac8 | 3076 | pmac_ohci_off(dev); |
ea8d006b | 3077 | |
2aef469a KH |
3078 | return 0; |
3079 | } | |
3080 | ||
2ed0f181 | 3081 | static int pci_resume(struct pci_dev *dev) |
2aef469a | 3082 | { |
2ed0f181 | 3083 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
3084 | int err; |
3085 | ||
5da3dac8 | 3086 | pmac_ohci_on(dev); |
2ed0f181 SR |
3087 | pci_set_power_state(dev, PCI_D0); |
3088 | pci_restore_state(dev); | |
3089 | err = pci_enable_device(dev); | |
2aef469a | 3090 | if (err) { |
8a8cea27 | 3091 | fw_error("pci_enable_device failed\n"); |
2aef469a KH |
3092 | return err; |
3093 | } | |
3094 | ||
0bd243c4 | 3095 | return ohci_enable(&ohci->card, NULL, 0); |
2aef469a KH |
3096 | } |
3097 | #endif | |
3098 | ||
a67483d2 | 3099 | static const struct pci_device_id pci_table[] = { |
ed568912 KH |
3100 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, |
3101 | { } | |
3102 | }; | |
3103 | ||
3104 | MODULE_DEVICE_TABLE(pci, pci_table); | |
3105 | ||
3106 | static struct pci_driver fw_ohci_pci_driver = { | |
3107 | .name = ohci_driver_name, | |
3108 | .id_table = pci_table, | |
3109 | .probe = pci_probe, | |
3110 | .remove = pci_remove, | |
2aef469a KH |
3111 | #ifdef CONFIG_PM |
3112 | .resume = pci_resume, | |
3113 | .suspend = pci_suspend, | |
3114 | #endif | |
ed568912 KH |
3115 | }; |
3116 | ||
3117 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
3118 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
3119 | MODULE_LICENSE("GPL"); | |
3120 | ||
1e4c7b0d OH |
3121 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
3122 | #ifndef CONFIG_IEEE1394_OHCI1394_MODULE | |
3123 | MODULE_ALIAS("ohci1394"); | |
3124 | #endif | |
3125 | ||
ed568912 KH |
3126 | static int __init fw_ohci_init(void) |
3127 | { | |
3128 | return pci_register_driver(&fw_ohci_pci_driver); | |
3129 | } | |
3130 | ||
3131 | static void __exit fw_ohci_cleanup(void) | |
3132 | { | |
3133 | pci_unregister_driver(&fw_ohci_pci_driver); | |
3134 | } | |
3135 | ||
3136 | module_init(fw_ohci_init); | |
3137 | module_exit(fw_ohci_cleanup); |