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Commit | Line | Data |
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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 | ||
837596a6 CL |
580 | static void ar_context_link_page(struct ar_context *ctx, |
581 | struct ar_buffer *ab, dma_addr_t ab_bus) | |
ed568912 | 582 | { |
32b46093 KH |
583 | size_t offset; |
584 | ||
a55709ba | 585 | ab->next = NULL; |
2d826cc5 | 586 | memset(&ab->descriptor, 0, sizeof(ab->descriptor)); |
a77754a7 KH |
587 | ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | |
588 | DESCRIPTOR_STATUS | | |
589 | DESCRIPTOR_BRANCH_ALWAYS); | |
32b46093 KH |
590 | offset = offsetof(struct ar_buffer, data); |
591 | ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset); | |
592 | ab->descriptor.data_address = cpu_to_le32(ab_bus + offset); | |
593 | ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset); | |
594 | ab->descriptor.branch_address = 0; | |
595 | ||
071595eb | 596 | wmb(); /* finish init of new descriptors before branch_address update */ |
ec839e43 | 597 | ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1); |
32b46093 KH |
598 | ctx->last_buffer->next = ab; |
599 | ctx->last_buffer = ab; | |
600 | ||
a77754a7 | 601 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
ed568912 | 602 | flush_writes(ctx->ohci); |
837596a6 CL |
603 | } |
604 | ||
605 | static int ar_context_add_page(struct ar_context *ctx) | |
606 | { | |
607 | struct device *dev = ctx->ohci->card.device; | |
608 | struct ar_buffer *ab; | |
609 | dma_addr_t uninitialized_var(ab_bus); | |
610 | ||
611 | ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC); | |
612 | if (ab == NULL) | |
613 | return -ENOMEM; | |
614 | ||
615 | ar_context_link_page(ctx, ab, ab_bus); | |
32b46093 KH |
616 | |
617 | return 0; | |
ed568912 KH |
618 | } |
619 | ||
a55709ba JF |
620 | static void ar_context_release(struct ar_context *ctx) |
621 | { | |
622 | struct ar_buffer *ab, *ab_next; | |
623 | size_t offset; | |
624 | dma_addr_t ab_bus; | |
625 | ||
626 | for (ab = ctx->current_buffer; ab; ab = ab_next) { | |
627 | ab_next = ab->next; | |
628 | offset = offsetof(struct ar_buffer, data); | |
629 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; | |
630 | dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
631 | ab, ab_bus); | |
632 | } | |
633 | } | |
634 | ||
11bf20ad SR |
635 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
636 | #define cond_le32_to_cpu(v) \ | |
4a635593 | 637 | (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v)) |
11bf20ad SR |
638 | #else |
639 | #define cond_le32_to_cpu(v) le32_to_cpu(v) | |
640 | #endif | |
641 | ||
32b46093 | 642 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 643 | { |
ed568912 | 644 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
645 | struct fw_packet p; |
646 | u32 status, length, tcode; | |
43286568 | 647 | int evt; |
2639a6fb | 648 | |
11bf20ad SR |
649 | p.header[0] = cond_le32_to_cpu(buffer[0]); |
650 | p.header[1] = cond_le32_to_cpu(buffer[1]); | |
651 | p.header[2] = cond_le32_to_cpu(buffer[2]); | |
2639a6fb KH |
652 | |
653 | tcode = (p.header[0] >> 4) & 0x0f; | |
654 | switch (tcode) { | |
655 | case TCODE_WRITE_QUADLET_REQUEST: | |
656 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 657 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 658 | p.header_length = 16; |
32b46093 | 659 | p.payload_length = 0; |
2639a6fb KH |
660 | break; |
661 | ||
2639a6fb | 662 | case TCODE_READ_BLOCK_REQUEST : |
11bf20ad | 663 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
32b46093 KH |
664 | p.header_length = 16; |
665 | p.payload_length = 0; | |
666 | break; | |
667 | ||
668 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
669 | case TCODE_READ_BLOCK_RESPONSE: |
670 | case TCODE_LOCK_REQUEST: | |
671 | case TCODE_LOCK_RESPONSE: | |
11bf20ad | 672 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
2639a6fb | 673 | p.header_length = 16; |
32b46093 | 674 | p.payload_length = p.header[3] >> 16; |
2639a6fb KH |
675 | break; |
676 | ||
677 | case TCODE_WRITE_RESPONSE: | |
678 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 679 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 680 | p.header_length = 12; |
32b46093 | 681 | p.payload_length = 0; |
2639a6fb | 682 | break; |
ccff9629 SR |
683 | |
684 | default: | |
685 | /* FIXME: Stop context, discard everything, and restart? */ | |
686 | p.header_length = 0; | |
687 | p.payload_length = 0; | |
2639a6fb | 688 | } |
ed568912 | 689 | |
32b46093 KH |
690 | p.payload = (void *) buffer + p.header_length; |
691 | ||
692 | /* FIXME: What to do about evt_* errors? */ | |
693 | length = (p.header_length + p.payload_length + 3) / 4; | |
11bf20ad | 694 | status = cond_le32_to_cpu(buffer[length]); |
43286568 | 695 | evt = (status >> 16) & 0x1f; |
32b46093 | 696 | |
43286568 | 697 | p.ack = evt - 16; |
32b46093 KH |
698 | p.speed = (status >> 21) & 0x7; |
699 | p.timestamp = status & 0xffff; | |
700 | p.generation = ohci->request_generation; | |
ed568912 | 701 | |
43286568 | 702 | log_ar_at_event('R', p.speed, p.header, evt); |
ad3c0fe8 | 703 | |
c781c06d | 704 | /* |
a4dc090b SR |
705 | * Several controllers, notably from NEC and VIA, forget to |
706 | * write ack_complete status at PHY packet reception. | |
707 | */ | |
708 | if (evt == OHCI1394_evt_no_status && | |
709 | (p.header[0] & 0xff) == (OHCI1394_phy_tcode << 4)) | |
710 | p.ack = ACK_COMPLETE; | |
711 | ||
712 | /* | |
713 | * The OHCI bus reset handler synthesizes a PHY packet with | |
ed568912 KH |
714 | * the new generation number when a bus reset happens (see |
715 | * section 8.4.2.3). This helps us determine when a request | |
716 | * was received and make sure we send the response in the same | |
717 | * generation. We only need this for requests; for responses | |
718 | * we use the unique tlabel for finding the matching | |
c781c06d | 719 | * request. |
d34316a4 SR |
720 | * |
721 | * Alas some chips sometimes emit bus reset packets with a | |
722 | * wrong generation. We set the correct generation for these | |
723 | * at a slightly incorrect time (in bus_reset_tasklet). | |
c781c06d | 724 | */ |
d34316a4 | 725 | if (evt == OHCI1394_evt_bus_reset) { |
4a635593 | 726 | if (!(ohci->quirks & QUIRK_RESET_PACKET)) |
d34316a4 SR |
727 | ohci->request_generation = (p.header[2] >> 16) & 0xff; |
728 | } else if (ctx == &ohci->ar_request_ctx) { | |
2639a6fb | 729 | fw_core_handle_request(&ohci->card, &p); |
d34316a4 | 730 | } else { |
2639a6fb | 731 | fw_core_handle_response(&ohci->card, &p); |
d34316a4 | 732 | } |
ed568912 | 733 | |
32b46093 KH |
734 | return buffer + length + 1; |
735 | } | |
ed568912 | 736 | |
32b46093 KH |
737 | static void ar_context_tasklet(unsigned long data) |
738 | { | |
739 | struct ar_context *ctx = (struct ar_context *)data; | |
32b46093 KH |
740 | struct ar_buffer *ab; |
741 | struct descriptor *d; | |
742 | void *buffer, *end; | |
693fa779 | 743 | __le16 res_count; |
32b46093 KH |
744 | |
745 | ab = ctx->current_buffer; | |
746 | d = &ab->descriptor; | |
747 | ||
693fa779 CL |
748 | res_count = ACCESS_ONCE(d->res_count); |
749 | if (res_count == 0) { | |
85f7ffd5 | 750 | size_t size, size2, rest, pktsize, size3, offset; |
6b84236d JW |
751 | dma_addr_t start_bus; |
752 | void *start; | |
32b46093 | 753 | |
c781c06d KH |
754 | /* |
755 | * This descriptor is finished and we may have a | |
32b46093 | 756 | * packet split across this and the next buffer. We |
c781c06d KH |
757 | * reuse the page for reassembling the split packet. |
758 | */ | |
32b46093 KH |
759 | |
760 | offset = offsetof(struct ar_buffer, data); | |
a1f805e5 | 761 | start = ab; |
6b84236d | 762 | start_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
a1f805e5 | 763 | buffer = ab->data; |
32b46093 | 764 | |
32b46093 KH |
765 | ab = ab->next; |
766 | d = &ab->descriptor; | |
a1f805e5 | 767 | size = start + PAGE_SIZE - ctx->pointer; |
85f7ffd5 | 768 | /* valid buffer data in the next page */ |
32b46093 | 769 | rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count); |
85f7ffd5 | 770 | /* what actually fits in this page */ |
a1f805e5 | 771 | size2 = min(rest, (size_t)PAGE_SIZE - offset - size); |
32b46093 | 772 | memmove(buffer, ctx->pointer, size); |
85f7ffd5 | 773 | memcpy(buffer + size, ab->data, size2); |
85f7ffd5 CL |
774 | |
775 | while (size > 0) { | |
776 | void *next = handle_ar_packet(ctx, buffer); | |
777 | pktsize = next - buffer; | |
778 | if (pktsize >= size) { | |
779 | /* | |
780 | * We have handled all the data that was | |
781 | * originally in this page, so we can now | |
782 | * continue in the next page. | |
783 | */ | |
784 | buffer = next; | |
785 | break; | |
786 | } | |
787 | /* move the next packet to the start of the buffer */ | |
788 | memmove(buffer, next, size + size2 - pktsize); | |
789 | size -= pktsize; | |
790 | /* fill up this page again */ | |
791 | size3 = min(rest - size2, | |
a1f805e5 | 792 | (size_t)PAGE_SIZE - offset - size - size2); |
85f7ffd5 CL |
793 | memcpy(buffer + size + size2, |
794 | (void *) ab->data + size2, size3); | |
795 | size2 += size3; | |
796 | } | |
797 | ||
a1f805e5 CL |
798 | if (rest > 0) { |
799 | /* handle the packets that are fully in the next page */ | |
800 | buffer = (void *) ab->data + | |
801 | (buffer - (start + offset + size)); | |
802 | end = (void *) ab->data + rest; | |
32b46093 | 803 | |
a1f805e5 CL |
804 | while (buffer < end) |
805 | buffer = handle_ar_packet(ctx, buffer); | |
32b46093 | 806 | |
a1f805e5 CL |
807 | ctx->current_buffer = ab; |
808 | ctx->pointer = end; | |
809 | ||
837596a6 | 810 | ar_context_link_page(ctx, start, start_bus); |
a1f805e5 CL |
811 | } else { |
812 | ctx->pointer = start + PAGE_SIZE; | |
813 | } | |
32b46093 KH |
814 | } else { |
815 | buffer = ctx->pointer; | |
816 | ctx->pointer = end = | |
693fa779 | 817 | (void *) ab + PAGE_SIZE - le16_to_cpu(res_count); |
32b46093 KH |
818 | |
819 | while (buffer < end) | |
820 | buffer = handle_ar_packet(ctx, buffer); | |
821 | } | |
ed568912 KH |
822 | } |
823 | ||
53dca511 SR |
824 | static int ar_context_init(struct ar_context *ctx, |
825 | struct fw_ohci *ohci, u32 regs) | |
ed568912 | 826 | { |
32b46093 | 827 | struct ar_buffer ab; |
ed568912 | 828 | |
72e318e0 KH |
829 | ctx->regs = regs; |
830 | ctx->ohci = ohci; | |
831 | ctx->last_buffer = &ab; | |
ed568912 KH |
832 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
833 | ||
32b46093 KH |
834 | ar_context_add_page(ctx); |
835 | ar_context_add_page(ctx); | |
836 | ctx->current_buffer = ab.next; | |
837 | ctx->pointer = ctx->current_buffer->data; | |
838 | ||
2aef469a KH |
839 | return 0; |
840 | } | |
841 | ||
842 | static void ar_context_run(struct ar_context *ctx) | |
843 | { | |
844 | struct ar_buffer *ab = ctx->current_buffer; | |
845 | dma_addr_t ab_bus; | |
846 | size_t offset; | |
847 | ||
848 | offset = offsetof(struct ar_buffer, data); | |
0a9972ba | 849 | ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset; |
2aef469a KH |
850 | |
851 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1); | |
a77754a7 | 852 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
32b46093 | 853 | flush_writes(ctx->ohci); |
ed568912 | 854 | } |
373b2edd | 855 | |
53dca511 | 856 | static struct descriptor *find_branch_descriptor(struct descriptor *d, int z) |
a186b4a6 JW |
857 | { |
858 | int b, key; | |
859 | ||
860 | b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2; | |
861 | key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8; | |
862 | ||
863 | /* figure out which descriptor the branch address goes in */ | |
864 | if (z == 2 && (b == 3 || key == 2)) | |
865 | return d; | |
866 | else | |
867 | return d + z - 1; | |
868 | } | |
869 | ||
30200739 KH |
870 | static void context_tasklet(unsigned long data) |
871 | { | |
872 | struct context *ctx = (struct context *) data; | |
30200739 KH |
873 | struct descriptor *d, *last; |
874 | u32 address; | |
875 | int z; | |
fe5ca634 | 876 | struct descriptor_buffer *desc; |
30200739 | 877 | |
fe5ca634 DM |
878 | desc = list_entry(ctx->buffer_list.next, |
879 | struct descriptor_buffer, list); | |
880 | last = ctx->last; | |
30200739 | 881 | while (last->branch_address != 0) { |
fe5ca634 | 882 | struct descriptor_buffer *old_desc = desc; |
30200739 KH |
883 | address = le32_to_cpu(last->branch_address); |
884 | z = address & 0xf; | |
fe5ca634 DM |
885 | address &= ~0xf; |
886 | ||
887 | /* If the branch address points to a buffer outside of the | |
888 | * current buffer, advance to the next buffer. */ | |
889 | if (address < desc->buffer_bus || | |
890 | address >= desc->buffer_bus + desc->used) | |
891 | desc = list_entry(desc->list.next, | |
892 | struct descriptor_buffer, list); | |
893 | d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d); | |
a186b4a6 | 894 | last = find_branch_descriptor(d, z); |
30200739 KH |
895 | |
896 | if (!ctx->callback(ctx, d, last)) | |
897 | break; | |
898 | ||
fe5ca634 DM |
899 | if (old_desc != desc) { |
900 | /* If we've advanced to the next buffer, move the | |
901 | * previous buffer to the free list. */ | |
902 | unsigned long flags; | |
903 | old_desc->used = 0; | |
904 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
905 | list_move_tail(&old_desc->list, &ctx->buffer_list); | |
906 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); | |
907 | } | |
908 | ctx->last = last; | |
30200739 KH |
909 | } |
910 | } | |
911 | ||
fe5ca634 DM |
912 | /* |
913 | * Allocate a new buffer and add it to the list of free buffers for this | |
914 | * context. Must be called with ohci->lock held. | |
915 | */ | |
53dca511 | 916 | static int context_add_buffer(struct context *ctx) |
fe5ca634 DM |
917 | { |
918 | struct descriptor_buffer *desc; | |
f5101d58 | 919 | dma_addr_t uninitialized_var(bus_addr); |
fe5ca634 DM |
920 | int offset; |
921 | ||
922 | /* | |
923 | * 16MB of descriptors should be far more than enough for any DMA | |
924 | * program. This will catch run-away userspace or DoS attacks. | |
925 | */ | |
926 | if (ctx->total_allocation >= 16*1024*1024) | |
927 | return -ENOMEM; | |
928 | ||
929 | desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
930 | &bus_addr, GFP_ATOMIC); | |
931 | if (!desc) | |
932 | return -ENOMEM; | |
933 | ||
934 | offset = (void *)&desc->buffer - (void *)desc; | |
935 | desc->buffer_size = PAGE_SIZE - offset; | |
936 | desc->buffer_bus = bus_addr + offset; | |
937 | desc->used = 0; | |
938 | ||
939 | list_add_tail(&desc->list, &ctx->buffer_list); | |
940 | ctx->total_allocation += PAGE_SIZE; | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
53dca511 SR |
945 | static int context_init(struct context *ctx, struct fw_ohci *ohci, |
946 | u32 regs, descriptor_callback_t callback) | |
30200739 KH |
947 | { |
948 | ctx->ohci = ohci; | |
949 | ctx->regs = regs; | |
fe5ca634 DM |
950 | ctx->total_allocation = 0; |
951 | ||
952 | INIT_LIST_HEAD(&ctx->buffer_list); | |
953 | if (context_add_buffer(ctx) < 0) | |
30200739 KH |
954 | return -ENOMEM; |
955 | ||
fe5ca634 DM |
956 | ctx->buffer_tail = list_entry(ctx->buffer_list.next, |
957 | struct descriptor_buffer, list); | |
958 | ||
30200739 KH |
959 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); |
960 | ctx->callback = callback; | |
961 | ||
c781c06d KH |
962 | /* |
963 | * We put a dummy descriptor in the buffer that has a NULL | |
30200739 | 964 | * branch address and looks like it's been sent. That way we |
fe5ca634 | 965 | * have a descriptor to append DMA programs to. |
c781c06d | 966 | */ |
fe5ca634 DM |
967 | memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer)); |
968 | ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); | |
969 | ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011); | |
970 | ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer); | |
971 | ctx->last = ctx->buffer_tail->buffer; | |
972 | ctx->prev = ctx->buffer_tail->buffer; | |
30200739 KH |
973 | |
974 | return 0; | |
975 | } | |
976 | ||
53dca511 | 977 | static void context_release(struct context *ctx) |
30200739 KH |
978 | { |
979 | struct fw_card *card = &ctx->ohci->card; | |
fe5ca634 | 980 | struct descriptor_buffer *desc, *tmp; |
30200739 | 981 | |
fe5ca634 DM |
982 | list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list) |
983 | dma_free_coherent(card->device, PAGE_SIZE, desc, | |
984 | desc->buffer_bus - | |
985 | ((void *)&desc->buffer - (void *)desc)); | |
30200739 KH |
986 | } |
987 | ||
fe5ca634 | 988 | /* Must be called with ohci->lock held */ |
53dca511 SR |
989 | static struct descriptor *context_get_descriptors(struct context *ctx, |
990 | int z, dma_addr_t *d_bus) | |
30200739 | 991 | { |
fe5ca634 DM |
992 | struct descriptor *d = NULL; |
993 | struct descriptor_buffer *desc = ctx->buffer_tail; | |
994 | ||
995 | if (z * sizeof(*d) > desc->buffer_size) | |
996 | return NULL; | |
997 | ||
998 | if (z * sizeof(*d) > desc->buffer_size - desc->used) { | |
999 | /* No room for the descriptor in this buffer, so advance to the | |
1000 | * next one. */ | |
30200739 | 1001 | |
fe5ca634 DM |
1002 | if (desc->list.next == &ctx->buffer_list) { |
1003 | /* If there is no free buffer next in the list, | |
1004 | * allocate one. */ | |
1005 | if (context_add_buffer(ctx) < 0) | |
1006 | return NULL; | |
1007 | } | |
1008 | desc = list_entry(desc->list.next, | |
1009 | struct descriptor_buffer, list); | |
1010 | ctx->buffer_tail = desc; | |
1011 | } | |
30200739 | 1012 | |
fe5ca634 | 1013 | d = desc->buffer + desc->used / sizeof(*d); |
2d826cc5 | 1014 | memset(d, 0, z * sizeof(*d)); |
fe5ca634 | 1015 | *d_bus = desc->buffer_bus + desc->used; |
30200739 KH |
1016 | |
1017 | return d; | |
1018 | } | |
1019 | ||
295e3feb | 1020 | static void context_run(struct context *ctx, u32 extra) |
30200739 KH |
1021 | { |
1022 | struct fw_ohci *ohci = ctx->ohci; | |
1023 | ||
a77754a7 | 1024 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
fe5ca634 | 1025 | le32_to_cpu(ctx->last->branch_address)); |
a77754a7 KH |
1026 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
1027 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); | |
30200739 KH |
1028 | flush_writes(ohci); |
1029 | } | |
1030 | ||
1031 | static void context_append(struct context *ctx, | |
1032 | struct descriptor *d, int z, int extra) | |
1033 | { | |
1034 | dma_addr_t d_bus; | |
fe5ca634 | 1035 | struct descriptor_buffer *desc = ctx->buffer_tail; |
30200739 | 1036 | |
fe5ca634 | 1037 | d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d); |
30200739 | 1038 | |
fe5ca634 | 1039 | desc->used += (z + extra) * sizeof(*d); |
071595eb SR |
1040 | |
1041 | wmb(); /* finish init of new descriptors before branch_address update */ | |
fe5ca634 DM |
1042 | ctx->prev->branch_address = cpu_to_le32(d_bus | z); |
1043 | ctx->prev = find_branch_descriptor(d, z); | |
30200739 | 1044 | |
a77754a7 | 1045 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
30200739 KH |
1046 | flush_writes(ctx->ohci); |
1047 | } | |
1048 | ||
1049 | static void context_stop(struct context *ctx) | |
1050 | { | |
1051 | u32 reg; | |
b8295668 | 1052 | int i; |
30200739 | 1053 | |
a77754a7 | 1054 | reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
b8295668 | 1055 | flush_writes(ctx->ohci); |
30200739 | 1056 | |
b8295668 | 1057 | for (i = 0; i < 10; i++) { |
a77754a7 | 1058 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
b8295668 | 1059 | if ((reg & CONTEXT_ACTIVE) == 0) |
b0068549 | 1060 | return; |
b8295668 | 1061 | |
b980f5a2 | 1062 | mdelay(1); |
b8295668 | 1063 | } |
b0068549 | 1064 | fw_error("Error: DMA context still active (0x%08x)\n", reg); |
30200739 | 1065 | } |
ed568912 | 1066 | |
f319b6a0 KH |
1067 | struct driver_data { |
1068 | struct fw_packet *packet; | |
1069 | }; | |
ed568912 | 1070 | |
c781c06d KH |
1071 | /* |
1072 | * This function apppends a packet to the DMA queue for transmission. | |
f319b6a0 | 1073 | * Must always be called with the ochi->lock held to ensure proper |
c781c06d KH |
1074 | * generation handling and locking around packet queue manipulation. |
1075 | */ | |
53dca511 SR |
1076 | static int at_context_queue_packet(struct context *ctx, |
1077 | struct fw_packet *packet) | |
ed568912 | 1078 | { |
ed568912 | 1079 | struct fw_ohci *ohci = ctx->ohci; |
4b6d51ec | 1080 | dma_addr_t d_bus, uninitialized_var(payload_bus); |
f319b6a0 KH |
1081 | struct driver_data *driver_data; |
1082 | struct descriptor *d, *last; | |
1083 | __le32 *header; | |
ed568912 | 1084 | int z, tcode; |
f319b6a0 | 1085 | u32 reg; |
ed568912 | 1086 | |
f319b6a0 KH |
1087 | d = context_get_descriptors(ctx, 4, &d_bus); |
1088 | if (d == NULL) { | |
1089 | packet->ack = RCODE_SEND_ERROR; | |
1090 | return -1; | |
ed568912 KH |
1091 | } |
1092 | ||
a77754a7 | 1093 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
f319b6a0 KH |
1094 | d[0].res_count = cpu_to_le16(packet->timestamp); |
1095 | ||
c781c06d KH |
1096 | /* |
1097 | * The DMA format for asyncronous link packets is different | |
ed568912 KH |
1098 | * from the IEEE1394 layout, so shift the fields around |
1099 | * accordingly. If header_length is 8, it's a PHY packet, to | |
c781c06d KH |
1100 | * which we need to prepend an extra quadlet. |
1101 | */ | |
f319b6a0 KH |
1102 | |
1103 | header = (__le32 *) &d[1]; | |
f8c2287c JF |
1104 | switch (packet->header_length) { |
1105 | case 16: | |
1106 | case 12: | |
f319b6a0 KH |
1107 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
1108 | (packet->speed << 16)); | |
1109 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
1110 | (packet->header[0] & 0xffff0000)); | |
1111 | header[2] = cpu_to_le32(packet->header[2]); | |
ed568912 KH |
1112 | |
1113 | tcode = (packet->header[0] >> 4) & 0x0f; | |
1114 | if (TCODE_IS_BLOCK_PACKET(tcode)) | |
f319b6a0 | 1115 | header[3] = cpu_to_le32(packet->header[3]); |
ed568912 | 1116 | else |
f319b6a0 KH |
1117 | header[3] = (__force __le32) packet->header[3]; |
1118 | ||
1119 | d[0].req_count = cpu_to_le16(packet->header_length); | |
f8c2287c JF |
1120 | break; |
1121 | ||
1122 | case 8: | |
f319b6a0 KH |
1123 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
1124 | (packet->speed << 16)); | |
1125 | header[1] = cpu_to_le32(packet->header[0]); | |
1126 | header[2] = cpu_to_le32(packet->header[1]); | |
1127 | d[0].req_count = cpu_to_le16(12); | |
cc550216 SR |
1128 | |
1129 | if (is_ping_packet(packet->header)) | |
1130 | d[0].control |= cpu_to_le16(DESCRIPTOR_PING); | |
f8c2287c JF |
1131 | break; |
1132 | ||
1133 | case 4: | |
1134 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | | |
1135 | (packet->speed << 16)); | |
1136 | header[1] = cpu_to_le32(packet->header[0] & 0xffff0000); | |
1137 | d[0].req_count = cpu_to_le16(8); | |
1138 | break; | |
1139 | ||
1140 | default: | |
1141 | /* BUG(); */ | |
1142 | packet->ack = RCODE_SEND_ERROR; | |
1143 | return -1; | |
ed568912 KH |
1144 | } |
1145 | ||
f319b6a0 KH |
1146 | driver_data = (struct driver_data *) &d[3]; |
1147 | driver_data->packet = packet; | |
20d11673 | 1148 | packet->driver_data = driver_data; |
a186b4a6 | 1149 | |
f319b6a0 KH |
1150 | if (packet->payload_length > 0) { |
1151 | payload_bus = | |
1152 | dma_map_single(ohci->card.device, packet->payload, | |
1153 | packet->payload_length, DMA_TO_DEVICE); | |
8d8bb39b | 1154 | if (dma_mapping_error(ohci->card.device, payload_bus)) { |
f319b6a0 KH |
1155 | packet->ack = RCODE_SEND_ERROR; |
1156 | return -1; | |
1157 | } | |
19593ffd SR |
1158 | packet->payload_bus = payload_bus; |
1159 | packet->payload_mapped = true; | |
f319b6a0 KH |
1160 | |
1161 | d[2].req_count = cpu_to_le16(packet->payload_length); | |
1162 | d[2].data_address = cpu_to_le32(payload_bus); | |
1163 | last = &d[2]; | |
1164 | z = 3; | |
ed568912 | 1165 | } else { |
f319b6a0 KH |
1166 | last = &d[0]; |
1167 | z = 2; | |
ed568912 | 1168 | } |
ed568912 | 1169 | |
a77754a7 KH |
1170 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
1171 | DESCRIPTOR_IRQ_ALWAYS | | |
1172 | DESCRIPTOR_BRANCH_ALWAYS); | |
ed568912 | 1173 | |
76f73ca1 JW |
1174 | /* |
1175 | * If the controller and packet generations don't match, we need to | |
1176 | * bail out and try again. If IntEvent.busReset is set, the AT context | |
1177 | * is halted, so appending to the context and trying to run it is | |
1178 | * futile. Most controllers do the right thing and just flush the AT | |
1179 | * queue (per section 7.2.3.2 of the OHCI 1.1 specification), but | |
1180 | * some controllers (like a JMicron JMB381 PCI-e) misbehave and wind | |
1181 | * up stalling out. So we just bail out in software and try again | |
1182 | * later, and everyone is happy. | |
1183 | * FIXME: Document how the locking works. | |
1184 | */ | |
1185 | if (ohci->generation != packet->generation || | |
1186 | reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) { | |
19593ffd | 1187 | if (packet->payload_mapped) |
ab88ca48 SR |
1188 | dma_unmap_single(ohci->card.device, payload_bus, |
1189 | packet->payload_length, DMA_TO_DEVICE); | |
f319b6a0 KH |
1190 | packet->ack = RCODE_GENERATION; |
1191 | return -1; | |
1192 | } | |
1193 | ||
1194 | context_append(ctx, d, z, 4 - z); | |
ed568912 | 1195 | |
f319b6a0 | 1196 | /* If the context isn't already running, start it up. */ |
a77754a7 | 1197 | reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs)); |
053b3080 | 1198 | if ((reg & CONTEXT_RUN) == 0) |
f319b6a0 KH |
1199 | context_run(ctx, 0); |
1200 | ||
1201 | return 0; | |
ed568912 KH |
1202 | } |
1203 | ||
f319b6a0 KH |
1204 | static int handle_at_packet(struct context *context, |
1205 | struct descriptor *d, | |
1206 | struct descriptor *last) | |
ed568912 | 1207 | { |
f319b6a0 | 1208 | struct driver_data *driver_data; |
ed568912 | 1209 | struct fw_packet *packet; |
f319b6a0 | 1210 | struct fw_ohci *ohci = context->ohci; |
ed568912 KH |
1211 | int evt; |
1212 | ||
f319b6a0 KH |
1213 | if (last->transfer_status == 0) |
1214 | /* This descriptor isn't done yet, stop iteration. */ | |
1215 | return 0; | |
ed568912 | 1216 | |
f319b6a0 KH |
1217 | driver_data = (struct driver_data *) &d[3]; |
1218 | packet = driver_data->packet; | |
1219 | if (packet == NULL) | |
1220 | /* This packet was cancelled, just continue. */ | |
1221 | return 1; | |
730c32f5 | 1222 | |
19593ffd | 1223 | if (packet->payload_mapped) |
1d1dc5e8 | 1224 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
ed568912 | 1225 | packet->payload_length, DMA_TO_DEVICE); |
ed568912 | 1226 | |
f319b6a0 KH |
1227 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
1228 | packet->timestamp = le16_to_cpu(last->res_count); | |
ed568912 | 1229 | |
ad3c0fe8 SR |
1230 | log_ar_at_event('T', packet->speed, packet->header, evt); |
1231 | ||
f319b6a0 KH |
1232 | switch (evt) { |
1233 | case OHCI1394_evt_timeout: | |
1234 | /* Async response transmit timed out. */ | |
1235 | packet->ack = RCODE_CANCELLED; | |
1236 | break; | |
ed568912 | 1237 | |
f319b6a0 | 1238 | case OHCI1394_evt_flushed: |
c781c06d KH |
1239 | /* |
1240 | * The packet was flushed should give same error as | |
1241 | * when we try to use a stale generation count. | |
1242 | */ | |
f319b6a0 KH |
1243 | packet->ack = RCODE_GENERATION; |
1244 | break; | |
ed568912 | 1245 | |
f319b6a0 | 1246 | case OHCI1394_evt_missing_ack: |
c781c06d KH |
1247 | /* |
1248 | * Using a valid (current) generation count, but the | |
1249 | * node is not on the bus or not sending acks. | |
1250 | */ | |
f319b6a0 KH |
1251 | packet->ack = RCODE_NO_ACK; |
1252 | break; | |
ed568912 | 1253 | |
f319b6a0 KH |
1254 | case ACK_COMPLETE + 0x10: |
1255 | case ACK_PENDING + 0x10: | |
1256 | case ACK_BUSY_X + 0x10: | |
1257 | case ACK_BUSY_A + 0x10: | |
1258 | case ACK_BUSY_B + 0x10: | |
1259 | case ACK_DATA_ERROR + 0x10: | |
1260 | case ACK_TYPE_ERROR + 0x10: | |
1261 | packet->ack = evt - 0x10; | |
1262 | break; | |
ed568912 | 1263 | |
f319b6a0 KH |
1264 | default: |
1265 | packet->ack = RCODE_SEND_ERROR; | |
1266 | break; | |
1267 | } | |
ed568912 | 1268 | |
f319b6a0 | 1269 | packet->callback(packet, &ohci->card, packet->ack); |
ed568912 | 1270 | |
f319b6a0 | 1271 | return 1; |
ed568912 KH |
1272 | } |
1273 | ||
a77754a7 KH |
1274 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
1275 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
1276 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
1277 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
1278 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
93c4cceb | 1279 | |
53dca511 SR |
1280 | static void handle_local_rom(struct fw_ohci *ohci, |
1281 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1282 | { |
1283 | struct fw_packet response; | |
1284 | int tcode, length, i; | |
1285 | ||
a77754a7 | 1286 | tcode = HEADER_GET_TCODE(packet->header[0]); |
93c4cceb | 1287 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
a77754a7 | 1288 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
93c4cceb KH |
1289 | else |
1290 | length = 4; | |
1291 | ||
1292 | i = csr - CSR_CONFIG_ROM; | |
1293 | if (i + length > CONFIG_ROM_SIZE) { | |
1294 | fw_fill_response(&response, packet->header, | |
1295 | RCODE_ADDRESS_ERROR, NULL, 0); | |
1296 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
1297 | fw_fill_response(&response, packet->header, | |
1298 | RCODE_TYPE_ERROR, NULL, 0); | |
1299 | } else { | |
1300 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
1301 | (void *) ohci->config_rom + i, length); | |
1302 | } | |
1303 | ||
1304 | fw_core_handle_response(&ohci->card, &response); | |
1305 | } | |
1306 | ||
53dca511 SR |
1307 | static void handle_local_lock(struct fw_ohci *ohci, |
1308 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1309 | { |
1310 | struct fw_packet response; | |
e1393667 | 1311 | int tcode, length, ext_tcode, sel, try; |
93c4cceb KH |
1312 | __be32 *payload, lock_old; |
1313 | u32 lock_arg, lock_data; | |
1314 | ||
a77754a7 KH |
1315 | tcode = HEADER_GET_TCODE(packet->header[0]); |
1316 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); | |
93c4cceb | 1317 | payload = packet->payload; |
a77754a7 | 1318 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
93c4cceb KH |
1319 | |
1320 | if (tcode == TCODE_LOCK_REQUEST && | |
1321 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
1322 | lock_arg = be32_to_cpu(payload[0]); | |
1323 | lock_data = be32_to_cpu(payload[1]); | |
1324 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1325 | lock_arg = 0; | |
1326 | lock_data = 0; | |
1327 | } else { | |
1328 | fw_fill_response(&response, packet->header, | |
1329 | RCODE_TYPE_ERROR, NULL, 0); | |
1330 | goto out; | |
1331 | } | |
1332 | ||
1333 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
1334 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
1335 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
1336 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
1337 | ||
e1393667 CL |
1338 | for (try = 0; try < 20; try++) |
1339 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) { | |
1340 | lock_old = cpu_to_be32(reg_read(ohci, | |
1341 | OHCI1394_CSRData)); | |
1342 | fw_fill_response(&response, packet->header, | |
1343 | RCODE_COMPLETE, | |
1344 | &lock_old, sizeof(lock_old)); | |
1345 | goto out; | |
1346 | } | |
1347 | ||
1348 | fw_error("swap not done (CSR lock timeout)\n"); | |
1349 | fw_fill_response(&response, packet->header, RCODE_BUSY, NULL, 0); | |
93c4cceb | 1350 | |
93c4cceb KH |
1351 | out: |
1352 | fw_core_handle_response(&ohci->card, &response); | |
1353 | } | |
1354 | ||
53dca511 | 1355 | static void handle_local_request(struct context *ctx, struct fw_packet *packet) |
93c4cceb | 1356 | { |
2608203d | 1357 | u64 offset, csr; |
93c4cceb | 1358 | |
473d28c7 KH |
1359 | if (ctx == &ctx->ohci->at_request_ctx) { |
1360 | packet->ack = ACK_PENDING; | |
1361 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1362 | } | |
93c4cceb KH |
1363 | |
1364 | offset = | |
1365 | ((unsigned long long) | |
a77754a7 | 1366 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
93c4cceb KH |
1367 | packet->header[2]; |
1368 | csr = offset - CSR_REGISTER_BASE; | |
1369 | ||
1370 | /* Handle config rom reads. */ | |
1371 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
1372 | handle_local_rom(ctx->ohci, packet, csr); | |
1373 | else switch (csr) { | |
1374 | case CSR_BUS_MANAGER_ID: | |
1375 | case CSR_BANDWIDTH_AVAILABLE: | |
1376 | case CSR_CHANNELS_AVAILABLE_HI: | |
1377 | case CSR_CHANNELS_AVAILABLE_LO: | |
1378 | handle_local_lock(ctx->ohci, packet, csr); | |
1379 | break; | |
1380 | default: | |
1381 | if (ctx == &ctx->ohci->at_request_ctx) | |
1382 | fw_core_handle_request(&ctx->ohci->card, packet); | |
1383 | else | |
1384 | fw_core_handle_response(&ctx->ohci->card, packet); | |
1385 | break; | |
1386 | } | |
473d28c7 KH |
1387 | |
1388 | if (ctx == &ctx->ohci->at_response_ctx) { | |
1389 | packet->ack = ACK_COMPLETE; | |
1390 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1391 | } | |
93c4cceb | 1392 | } |
e636fe25 | 1393 | |
53dca511 | 1394 | static void at_context_transmit(struct context *ctx, struct fw_packet *packet) |
ed568912 | 1395 | { |
ed568912 | 1396 | unsigned long flags; |
2dbd7d7e | 1397 | int ret; |
ed568912 KH |
1398 | |
1399 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
1400 | ||
a77754a7 | 1401 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
e636fe25 | 1402 | ctx->ohci->generation == packet->generation) { |
93c4cceb KH |
1403 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1404 | handle_local_request(ctx, packet); | |
1405 | return; | |
e636fe25 | 1406 | } |
ed568912 | 1407 | |
2dbd7d7e | 1408 | ret = at_context_queue_packet(ctx, packet); |
ed568912 KH |
1409 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1410 | ||
2dbd7d7e | 1411 | if (ret < 0) |
f319b6a0 | 1412 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
a186b4a6 | 1413 | |
ed568912 KH |
1414 | } |
1415 | ||
a48777e0 CL |
1416 | static u32 cycle_timer_ticks(u32 cycle_timer) |
1417 | { | |
1418 | u32 ticks; | |
1419 | ||
1420 | ticks = cycle_timer & 0xfff; | |
1421 | ticks += 3072 * ((cycle_timer >> 12) & 0x1fff); | |
1422 | ticks += (3072 * 8000) * (cycle_timer >> 25); | |
1423 | ||
1424 | return ticks; | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Some controllers exhibit one or more of the following bugs when updating the | |
1429 | * iso cycle timer register: | |
1430 | * - When the lowest six bits are wrapping around to zero, a read that happens | |
1431 | * at the same time will return garbage in the lowest ten bits. | |
1432 | * - When the cycleOffset field wraps around to zero, the cycleCount field is | |
1433 | * not incremented for about 60 ns. | |
1434 | * - Occasionally, the entire register reads zero. | |
1435 | * | |
1436 | * To catch these, we read the register three times and ensure that the | |
1437 | * difference between each two consecutive reads is approximately the same, i.e. | |
1438 | * less than twice the other. Furthermore, any negative difference indicates an | |
1439 | * error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to | |
1440 | * execute, so we have enough precision to compute the ratio of the differences.) | |
1441 | */ | |
1442 | static u32 get_cycle_time(struct fw_ohci *ohci) | |
1443 | { | |
1444 | u32 c0, c1, c2; | |
1445 | u32 t0, t1, t2; | |
1446 | s32 diff01, diff12; | |
1447 | int i; | |
1448 | ||
1449 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1450 | ||
1451 | if (ohci->quirks & QUIRK_CYCLE_TIMER) { | |
1452 | i = 0; | |
1453 | c1 = c2; | |
1454 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1455 | do { | |
1456 | c0 = c1; | |
1457 | c1 = c2; | |
1458 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1459 | t0 = cycle_timer_ticks(c0); | |
1460 | t1 = cycle_timer_ticks(c1); | |
1461 | t2 = cycle_timer_ticks(c2); | |
1462 | diff01 = t1 - t0; | |
1463 | diff12 = t2 - t1; | |
1464 | } while ((diff01 <= 0 || diff12 <= 0 || | |
1465 | diff01 / diff12 >= 2 || diff12 / diff01 >= 2) | |
1466 | && i++ < 20); | |
1467 | } | |
1468 | ||
1469 | return c2; | |
1470 | } | |
1471 | ||
1472 | /* | |
1473 | * This function has to be called at least every 64 seconds. The bus_time | |
1474 | * field stores not only the upper 25 bits of the BUS_TIME register but also | |
1475 | * the most significant bit of the cycle timer in bit 6 so that we can detect | |
1476 | * changes in this bit. | |
1477 | */ | |
1478 | static u32 update_bus_time(struct fw_ohci *ohci) | |
1479 | { | |
1480 | u32 cycle_time_seconds = get_cycle_time(ohci) >> 25; | |
1481 | ||
1482 | if ((ohci->bus_time & 0x40) != (cycle_time_seconds & 0x40)) | |
1483 | ohci->bus_time += 0x40; | |
1484 | ||
1485 | return ohci->bus_time | cycle_time_seconds; | |
1486 | } | |
1487 | ||
ed568912 KH |
1488 | static void bus_reset_tasklet(unsigned long data) |
1489 | { | |
1490 | struct fw_ohci *ohci = (struct fw_ohci *)data; | |
e636fe25 | 1491 | int self_id_count, i, j, reg; |
ed568912 KH |
1492 | int generation, new_generation; |
1493 | unsigned long flags; | |
4eaff7d6 SR |
1494 | void *free_rom = NULL; |
1495 | dma_addr_t free_rom_bus = 0; | |
4ffb7a6a | 1496 | bool is_new_root; |
ed568912 KH |
1497 | |
1498 | reg = reg_read(ohci, OHCI1394_NodeID); | |
1499 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
02ff8f8e | 1500 | fw_notify("node ID not valid, new bus reset in progress\n"); |
ed568912 KH |
1501 | return; |
1502 | } | |
02ff8f8e SR |
1503 | if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { |
1504 | fw_notify("malconfigured bus\n"); | |
1505 | return; | |
1506 | } | |
1507 | ohci->node_id = reg & (OHCI1394_NodeID_busNumber | | |
1508 | OHCI1394_NodeID_nodeNumber); | |
ed568912 | 1509 | |
4ffb7a6a CL |
1510 | is_new_root = (reg & OHCI1394_NodeID_root) != 0; |
1511 | if (!(ohci->is_root && is_new_root)) | |
1512 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1513 | OHCI1394_LinkControl_cycleMaster); | |
1514 | ohci->is_root = is_new_root; | |
1515 | ||
c8a9a498 SR |
1516 | reg = reg_read(ohci, OHCI1394_SelfIDCount); |
1517 | if (reg & OHCI1394_SelfIDCount_selfIDError) { | |
1518 | fw_notify("inconsistent self IDs\n"); | |
1519 | return; | |
1520 | } | |
c781c06d KH |
1521 | /* |
1522 | * The count in the SelfIDCount register is the number of | |
ed568912 KH |
1523 | * bytes in the self ID receive buffer. Since we also receive |
1524 | * the inverted quadlets and a header quadlet, we shift one | |
c781c06d KH |
1525 | * bit extra to get the actual number of self IDs. |
1526 | */ | |
928ec5f1 SR |
1527 | self_id_count = (reg >> 3) & 0xff; |
1528 | if (self_id_count == 0 || self_id_count > 252) { | |
016bf3df SR |
1529 | fw_notify("inconsistent self IDs\n"); |
1530 | return; | |
1531 | } | |
11bf20ad | 1532 | generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; |
ee71c2f9 | 1533 | rmb(); |
ed568912 KH |
1534 | |
1535 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
c8a9a498 SR |
1536 | if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) { |
1537 | fw_notify("inconsistent self IDs\n"); | |
1538 | return; | |
1539 | } | |
11bf20ad SR |
1540 | ohci->self_id_buffer[j] = |
1541 | cond_le32_to_cpu(ohci->self_id_cpu[i]); | |
ed568912 | 1542 | } |
ee71c2f9 | 1543 | rmb(); |
ed568912 | 1544 | |
c781c06d KH |
1545 | /* |
1546 | * Check the consistency of the self IDs we just read. The | |
ed568912 KH |
1547 | * problem we face is that a new bus reset can start while we |
1548 | * read out the self IDs from the DMA buffer. If this happens, | |
1549 | * the DMA buffer will be overwritten with new self IDs and we | |
1550 | * will read out inconsistent data. The OHCI specification | |
1551 | * (section 11.2) recommends a technique similar to | |
1552 | * linux/seqlock.h, where we remember the generation of the | |
1553 | * self IDs in the buffer before reading them out and compare | |
1554 | * it to the current generation after reading them out. If | |
1555 | * the two generations match we know we have a consistent set | |
c781c06d KH |
1556 | * of self IDs. |
1557 | */ | |
ed568912 KH |
1558 | |
1559 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
1560 | if (new_generation != generation) { | |
1561 | fw_notify("recursive bus reset detected, " | |
1562 | "discarding self ids\n"); | |
1563 | return; | |
1564 | } | |
1565 | ||
1566 | /* FIXME: Document how the locking works. */ | |
1567 | spin_lock_irqsave(&ohci->lock, flags); | |
1568 | ||
1569 | ohci->generation = generation; | |
f319b6a0 KH |
1570 | context_stop(&ohci->at_request_ctx); |
1571 | context_stop(&ohci->at_response_ctx); | |
ed568912 KH |
1572 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
1573 | ||
4a635593 | 1574 | if (ohci->quirks & QUIRK_RESET_PACKET) |
d34316a4 SR |
1575 | ohci->request_generation = generation; |
1576 | ||
c781c06d KH |
1577 | /* |
1578 | * This next bit is unrelated to the AT context stuff but we | |
ed568912 KH |
1579 | * have to do it under the spinlock also. If a new config rom |
1580 | * was set up before this reset, the old one is now no longer | |
1581 | * in use and we can free it. Update the config rom pointers | |
1582 | * to point to the current config rom and clear the | |
88393161 | 1583 | * next_config_rom pointer so a new update can take place. |
c781c06d | 1584 | */ |
ed568912 KH |
1585 | |
1586 | if (ohci->next_config_rom != NULL) { | |
0bd243c4 KH |
1587 | if (ohci->next_config_rom != ohci->config_rom) { |
1588 | free_rom = ohci->config_rom; | |
1589 | free_rom_bus = ohci->config_rom_bus; | |
1590 | } | |
ed568912 KH |
1591 | ohci->config_rom = ohci->next_config_rom; |
1592 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
1593 | ohci->next_config_rom = NULL; | |
1594 | ||
c781c06d KH |
1595 | /* |
1596 | * Restore config_rom image and manually update | |
ed568912 KH |
1597 | * config_rom registers. Writing the header quadlet |
1598 | * will indicate that the config rom is ready, so we | |
c781c06d KH |
1599 | * do that last. |
1600 | */ | |
ed568912 KH |
1601 | reg_write(ohci, OHCI1394_BusOptions, |
1602 | be32_to_cpu(ohci->config_rom[2])); | |
8e85973e SR |
1603 | ohci->config_rom[0] = ohci->next_header; |
1604 | reg_write(ohci, OHCI1394_ConfigROMhdr, | |
1605 | be32_to_cpu(ohci->next_header)); | |
ed568912 KH |
1606 | } |
1607 | ||
080de8c2 SR |
1608 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
1609 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); | |
1610 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); | |
1611 | #endif | |
1612 | ||
ed568912 KH |
1613 | spin_unlock_irqrestore(&ohci->lock, flags); |
1614 | ||
4eaff7d6 SR |
1615 | if (free_rom) |
1616 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1617 | free_rom, free_rom_bus); | |
1618 | ||
08ddb2f4 SR |
1619 | log_selfids(ohci->node_id, generation, |
1620 | self_id_count, ohci->self_id_buffer); | |
ad3c0fe8 | 1621 | |
e636fe25 | 1622 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
c8a94ded SR |
1623 | self_id_count, ohci->self_id_buffer, |
1624 | ohci->csr_state_setclear_abdicate); | |
1625 | ohci->csr_state_setclear_abdicate = false; | |
ed568912 KH |
1626 | } |
1627 | ||
1628 | static irqreturn_t irq_handler(int irq, void *data) | |
1629 | { | |
1630 | struct fw_ohci *ohci = data; | |
168cf9af | 1631 | u32 event, iso_event; |
ed568912 KH |
1632 | int i; |
1633 | ||
1634 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
1635 | ||
a515958d | 1636 | if (!event || !~event) |
ed568912 KH |
1637 | return IRQ_NONE; |
1638 | ||
a007bb85 SR |
1639 | /* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */ |
1640 | reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset); | |
ad3c0fe8 | 1641 | log_irqs(event); |
ed568912 KH |
1642 | |
1643 | if (event & OHCI1394_selfIDComplete) | |
1644 | tasklet_schedule(&ohci->bus_reset_tasklet); | |
1645 | ||
1646 | if (event & OHCI1394_RQPkt) | |
1647 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
1648 | ||
1649 | if (event & OHCI1394_RSPkt) | |
1650 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
1651 | ||
1652 | if (event & OHCI1394_reqTxComplete) | |
1653 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
1654 | ||
1655 | if (event & OHCI1394_respTxComplete) | |
1656 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
1657 | ||
c889475f | 1658 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); |
ed568912 KH |
1659 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); |
1660 | ||
1661 | while (iso_event) { | |
1662 | i = ffs(iso_event) - 1; | |
30200739 | 1663 | tasklet_schedule(&ohci->ir_context_list[i].context.tasklet); |
ed568912 KH |
1664 | iso_event &= ~(1 << i); |
1665 | } | |
1666 | ||
c889475f | 1667 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); |
ed568912 KH |
1668 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); |
1669 | ||
1670 | while (iso_event) { | |
1671 | i = ffs(iso_event) - 1; | |
30200739 | 1672 | tasklet_schedule(&ohci->it_context_list[i].context.tasklet); |
ed568912 KH |
1673 | iso_event &= ~(1 << i); |
1674 | } | |
1675 | ||
75f7832e JW |
1676 | if (unlikely(event & OHCI1394_regAccessFail)) |
1677 | fw_error("Register access failure - " | |
1678 | "please notify linux1394-devel@lists.sf.net\n"); | |
1679 | ||
e524f616 SR |
1680 | if (unlikely(event & OHCI1394_postedWriteErr)) |
1681 | fw_error("PCI posted write error\n"); | |
1682 | ||
bb9f2206 SR |
1683 | if (unlikely(event & OHCI1394_cycleTooLong)) { |
1684 | if (printk_ratelimit()) | |
1685 | fw_notify("isochronous cycle too long\n"); | |
1686 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1687 | OHCI1394_LinkControl_cycleMaster); | |
1688 | } | |
1689 | ||
5ed1f321 JF |
1690 | if (unlikely(event & OHCI1394_cycleInconsistent)) { |
1691 | /* | |
1692 | * We need to clear this event bit in order to make | |
1693 | * cycleMatch isochronous I/O work. In theory we should | |
1694 | * stop active cycleMatch iso contexts now and restart | |
1695 | * them at least two cycles later. (FIXME?) | |
1696 | */ | |
1697 | if (printk_ratelimit()) | |
1698 | fw_notify("isochronous cycle inconsistent\n"); | |
1699 | } | |
1700 | ||
a48777e0 CL |
1701 | if (event & OHCI1394_cycle64Seconds) { |
1702 | spin_lock(&ohci->lock); | |
1703 | update_bus_time(ohci); | |
1704 | spin_unlock(&ohci->lock); | |
1705 | } | |
1706 | ||
ed568912 KH |
1707 | return IRQ_HANDLED; |
1708 | } | |
1709 | ||
2aef469a KH |
1710 | static int software_reset(struct fw_ohci *ohci) |
1711 | { | |
1712 | int i; | |
1713 | ||
1714 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
1715 | ||
1716 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
1717 | if ((reg_read(ohci, OHCI1394_HCControlSet) & | |
1718 | OHCI1394_HCControl_softReset) == 0) | |
1719 | return 0; | |
1720 | msleep(1); | |
1721 | } | |
1722 | ||
1723 | return -EBUSY; | |
1724 | } | |
1725 | ||
8e85973e SR |
1726 | static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length) |
1727 | { | |
1728 | size_t size = length * 4; | |
1729 | ||
1730 | memcpy(dest, src, size); | |
1731 | if (size < CONFIG_ROM_SIZE) | |
1732 | memset(&dest[length], 0, CONFIG_ROM_SIZE - size); | |
1733 | } | |
1734 | ||
925e7a65 CL |
1735 | static int configure_1394a_enhancements(struct fw_ohci *ohci) |
1736 | { | |
1737 | bool enable_1394a; | |
35d999b1 | 1738 | int ret, clear, set, offset; |
925e7a65 CL |
1739 | |
1740 | /* Check if the driver should configure link and PHY. */ | |
1741 | if (!(reg_read(ohci, OHCI1394_HCControlSet) & | |
1742 | OHCI1394_HCControl_programPhyEnable)) | |
1743 | return 0; | |
1744 | ||
1745 | /* Paranoia: check whether the PHY supports 1394a, too. */ | |
1746 | enable_1394a = false; | |
35d999b1 SR |
1747 | ret = read_phy_reg(ohci, 2); |
1748 | if (ret < 0) | |
1749 | return ret; | |
1750 | if ((ret & PHY_EXTENDED_REGISTERS) == PHY_EXTENDED_REGISTERS) { | |
1751 | ret = read_paged_phy_reg(ohci, 1, 8); | |
1752 | if (ret < 0) | |
1753 | return ret; | |
1754 | if (ret >= 1) | |
925e7a65 CL |
1755 | enable_1394a = true; |
1756 | } | |
1757 | ||
1758 | if (ohci->quirks & QUIRK_NO_1394A) | |
1759 | enable_1394a = false; | |
1760 | ||
1761 | /* Configure PHY and link consistently. */ | |
1762 | if (enable_1394a) { | |
1763 | clear = 0; | |
1764 | set = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; | |
1765 | } else { | |
1766 | clear = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; | |
1767 | set = 0; | |
1768 | } | |
02d37bed | 1769 | ret = update_phy_reg(ohci, 5, clear, set); |
35d999b1 SR |
1770 | if (ret < 0) |
1771 | return ret; | |
925e7a65 CL |
1772 | |
1773 | if (enable_1394a) | |
1774 | offset = OHCI1394_HCControlSet; | |
1775 | else | |
1776 | offset = OHCI1394_HCControlClear; | |
1777 | reg_write(ohci, offset, OHCI1394_HCControl_aPhyEnhanceEnable); | |
1778 | ||
1779 | /* Clean up: configuration has been taken care of. */ | |
1780 | reg_write(ohci, OHCI1394_HCControlClear, | |
1781 | OHCI1394_HCControl_programPhyEnable); | |
1782 | ||
1783 | return 0; | |
1784 | } | |
1785 | ||
8e85973e SR |
1786 | static int ohci_enable(struct fw_card *card, |
1787 | const __be32 *config_rom, size_t length) | |
ed568912 KH |
1788 | { |
1789 | struct fw_ohci *ohci = fw_ohci(card); | |
1790 | struct pci_dev *dev = to_pci_dev(card->device); | |
e91b2787 | 1791 | u32 lps, seconds, version, irqs; |
35d999b1 | 1792 | int i, ret; |
ed568912 | 1793 | |
2aef469a KH |
1794 | if (software_reset(ohci)) { |
1795 | fw_error("Failed to reset ohci card.\n"); | |
1796 | return -EBUSY; | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * Now enable LPS, which we need in order to start accessing | |
1801 | * most of the registers. In fact, on some cards (ALI M5251), | |
1802 | * accessing registers in the SClk domain without LPS enabled | |
1803 | * will lock up the machine. Wait 50msec to make sure we have | |
02214724 JW |
1804 | * full link enabled. However, with some cards (well, at least |
1805 | * a JMicron PCIe card), we have to try again sometimes. | |
2aef469a KH |
1806 | */ |
1807 | reg_write(ohci, OHCI1394_HCControlSet, | |
1808 | OHCI1394_HCControl_LPS | | |
1809 | OHCI1394_HCControl_postedWriteEnable); | |
1810 | flush_writes(ohci); | |
02214724 JW |
1811 | |
1812 | for (lps = 0, i = 0; !lps && i < 3; i++) { | |
1813 | msleep(50); | |
1814 | lps = reg_read(ohci, OHCI1394_HCControlSet) & | |
1815 | OHCI1394_HCControl_LPS; | |
1816 | } | |
1817 | ||
1818 | if (!lps) { | |
1819 | fw_error("Failed to set Link Power Status\n"); | |
1820 | return -EIO; | |
1821 | } | |
2aef469a KH |
1822 | |
1823 | reg_write(ohci, OHCI1394_HCControlClear, | |
1824 | OHCI1394_HCControl_noByteSwapData); | |
1825 | ||
affc9c24 | 1826 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); |
2aef469a KH |
1827 | reg_write(ohci, OHCI1394_LinkControlSet, |
1828 | OHCI1394_LinkControl_rcvSelfID | | |
bf54e146 | 1829 | OHCI1394_LinkControl_rcvPhyPkt | |
2aef469a KH |
1830 | OHCI1394_LinkControl_cycleTimerEnable | |
1831 | OHCI1394_LinkControl_cycleMaster); | |
1832 | ||
1833 | reg_write(ohci, OHCI1394_ATRetries, | |
1834 | OHCI1394_MAX_AT_REQ_RETRIES | | |
1835 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
27a2329f CL |
1836 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8) | |
1837 | (200 << 16)); | |
2aef469a | 1838 | |
a48777e0 CL |
1839 | seconds = lower_32_bits(get_seconds()); |
1840 | reg_write(ohci, OHCI1394_IsochronousCycleTimer, seconds << 25); | |
1841 | ohci->bus_time = seconds & ~0x3f; | |
1842 | ||
e91b2787 CL |
1843 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
1844 | if (version >= OHCI_VERSION_1_1) { | |
1845 | reg_write(ohci, OHCI1394_InitialChannelsAvailableHi, | |
1846 | 0xfffffffe); | |
db3c9cc1 | 1847 | card->broadcast_channel_auto_allocated = true; |
e91b2787 CL |
1848 | } |
1849 | ||
a1a1132b CL |
1850 | /* Get implemented bits of the priority arbitration request counter. */ |
1851 | reg_write(ohci, OHCI1394_FairnessControl, 0x3f); | |
1852 | ohci->pri_req_max = reg_read(ohci, OHCI1394_FairnessControl) & 0x3f; | |
1853 | reg_write(ohci, OHCI1394_FairnessControl, 0); | |
db3c9cc1 | 1854 | card->priority_budget_implemented = ohci->pri_req_max != 0; |
2aef469a KH |
1855 | |
1856 | ar_context_run(&ohci->ar_request_ctx); | |
1857 | ar_context_run(&ohci->ar_response_ctx); | |
1858 | ||
2aef469a KH |
1859 | reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000); |
1860 | reg_write(ohci, OHCI1394_IntEventClear, ~0); | |
1861 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
2aef469a | 1862 | |
35d999b1 SR |
1863 | ret = configure_1394a_enhancements(ohci); |
1864 | if (ret < 0) | |
1865 | return ret; | |
925e7a65 | 1866 | |
2aef469a | 1867 | /* Activate link_on bit and contender bit in our self ID packets.*/ |
35d999b1 SR |
1868 | ret = ohci_update_phy_reg(card, 4, 0, PHY_LINK_ACTIVE | PHY_CONTENDER); |
1869 | if (ret < 0) | |
1870 | return ret; | |
2aef469a | 1871 | |
c781c06d KH |
1872 | /* |
1873 | * When the link is not yet enabled, the atomic config rom | |
ed568912 KH |
1874 | * update mechanism described below in ohci_set_config_rom() |
1875 | * is not active. We have to update ConfigRomHeader and | |
1876 | * BusOptions manually, and the write to ConfigROMmap takes | |
1877 | * effect immediately. We tie this to the enabling of the | |
1878 | * link, so we have a valid config rom before enabling - the | |
1879 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
1880 | * values before enabling. | |
1881 | * | |
1882 | * However, when the ConfigROMmap is written, some controllers | |
1883 | * always read back quadlets 0 and 2 from the config rom to | |
1884 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
1885 | * They shouldn't do that in this initial case where the link | |
1886 | * isn't enabled. This means we have to use the same | |
1887 | * workaround here, setting the bus header to 0 and then write | |
1888 | * the right values in the bus reset tasklet. | |
1889 | */ | |
1890 | ||
0bd243c4 KH |
1891 | if (config_rom) { |
1892 | ohci->next_config_rom = | |
1893 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1894 | &ohci->next_config_rom_bus, | |
1895 | GFP_KERNEL); | |
1896 | if (ohci->next_config_rom == NULL) | |
1897 | return -ENOMEM; | |
ed568912 | 1898 | |
8e85973e | 1899 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
0bd243c4 KH |
1900 | } else { |
1901 | /* | |
1902 | * In the suspend case, config_rom is NULL, which | |
1903 | * means that we just reuse the old config rom. | |
1904 | */ | |
1905 | ohci->next_config_rom = ohci->config_rom; | |
1906 | ohci->next_config_rom_bus = ohci->config_rom_bus; | |
1907 | } | |
ed568912 | 1908 | |
8e85973e | 1909 | ohci->next_header = ohci->next_config_rom[0]; |
ed568912 KH |
1910 | ohci->next_config_rom[0] = 0; |
1911 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
0bd243c4 KH |
1912 | reg_write(ohci, OHCI1394_BusOptions, |
1913 | be32_to_cpu(ohci->next_config_rom[2])); | |
ed568912 KH |
1914 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
1915 | ||
1916 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
1917 | ||
262444ee CL |
1918 | if (!(ohci->quirks & QUIRK_NO_MSI)) |
1919 | pci_enable_msi(dev); | |
ed568912 | 1920 | if (request_irq(dev->irq, irq_handler, |
262444ee CL |
1921 | pci_dev_msi_enabled(dev) ? 0 : IRQF_SHARED, |
1922 | ohci_driver_name, ohci)) { | |
1923 | fw_error("Failed to allocate interrupt %d.\n", dev->irq); | |
1924 | pci_disable_msi(dev); | |
ed568912 KH |
1925 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, |
1926 | ohci->config_rom, ohci->config_rom_bus); | |
1927 | return -EIO; | |
1928 | } | |
1929 | ||
148c7866 SR |
1930 | irqs = OHCI1394_reqTxComplete | OHCI1394_respTxComplete | |
1931 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
1932 | OHCI1394_isochTx | OHCI1394_isochRx | | |
1933 | OHCI1394_postedWriteErr | | |
1934 | OHCI1394_selfIDComplete | | |
1935 | OHCI1394_regAccessFail | | |
a48777e0 | 1936 | OHCI1394_cycle64Seconds | |
148c7866 SR |
1937 | OHCI1394_cycleInconsistent | OHCI1394_cycleTooLong | |
1938 | OHCI1394_masterIntEnable; | |
1939 | if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) | |
1940 | irqs |= OHCI1394_busReset; | |
1941 | reg_write(ohci, OHCI1394_IntMaskSet, irqs); | |
1942 | ||
ed568912 KH |
1943 | reg_write(ohci, OHCI1394_HCControlSet, |
1944 | OHCI1394_HCControl_linkEnable | | |
1945 | OHCI1394_HCControl_BIBimageValid); | |
1946 | flush_writes(ohci); | |
1947 | ||
02d37bed SR |
1948 | /* We are ready to go, reset bus to finish initialization. */ |
1949 | fw_schedule_bus_reset(&ohci->card, false, true); | |
ed568912 KH |
1950 | |
1951 | return 0; | |
1952 | } | |
1953 | ||
53dca511 | 1954 | static int ohci_set_config_rom(struct fw_card *card, |
8e85973e | 1955 | const __be32 *config_rom, size_t length) |
ed568912 KH |
1956 | { |
1957 | struct fw_ohci *ohci; | |
1958 | unsigned long flags; | |
2dbd7d7e | 1959 | int ret = -EBUSY; |
ed568912 | 1960 | __be32 *next_config_rom; |
f5101d58 | 1961 | dma_addr_t uninitialized_var(next_config_rom_bus); |
ed568912 KH |
1962 | |
1963 | ohci = fw_ohci(card); | |
1964 | ||
c781c06d KH |
1965 | /* |
1966 | * When the OHCI controller is enabled, the config rom update | |
ed568912 KH |
1967 | * mechanism is a bit tricky, but easy enough to use. See |
1968 | * section 5.5.6 in the OHCI specification. | |
1969 | * | |
1970 | * The OHCI controller caches the new config rom address in a | |
1971 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
1972 | * for the changes to take place. When the bus reset is | |
1973 | * detected, the controller loads the new values for the | |
1974 | * ConfigRomHeader and BusOptions registers from the specified | |
1975 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
1976 | * shadow register. All automatically and atomically. | |
1977 | * | |
1978 | * Now, there's a twist to this story. The automatic load of | |
1979 | * ConfigRomHeader and BusOptions doesn't honor the | |
1980 | * noByteSwapData bit, so with a be32 config rom, the | |
1981 | * controller will load be32 values in to these registers | |
1982 | * during the atomic update, even on litte endian | |
1983 | * architectures. The workaround we use is to put a 0 in the | |
1984 | * header quadlet; 0 is endian agnostic and means that the | |
1985 | * config rom isn't ready yet. In the bus reset tasklet we | |
1986 | * then set up the real values for the two registers. | |
1987 | * | |
1988 | * We use ohci->lock to avoid racing with the code that sets | |
1989 | * ohci->next_config_rom to NULL (see bus_reset_tasklet). | |
1990 | */ | |
1991 | ||
1992 | next_config_rom = | |
1993 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
1994 | &next_config_rom_bus, GFP_KERNEL); | |
1995 | if (next_config_rom == NULL) | |
1996 | return -ENOMEM; | |
1997 | ||
1998 | spin_lock_irqsave(&ohci->lock, flags); | |
1999 | ||
2000 | if (ohci->next_config_rom == NULL) { | |
2001 | ohci->next_config_rom = next_config_rom; | |
2002 | ohci->next_config_rom_bus = next_config_rom_bus; | |
2003 | ||
8e85973e | 2004 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
ed568912 KH |
2005 | |
2006 | ohci->next_header = config_rom[0]; | |
2007 | ohci->next_config_rom[0] = 0; | |
2008 | ||
2009 | reg_write(ohci, OHCI1394_ConfigROMmap, | |
2010 | ohci->next_config_rom_bus); | |
2dbd7d7e | 2011 | ret = 0; |
ed568912 KH |
2012 | } |
2013 | ||
2014 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2015 | ||
c781c06d KH |
2016 | /* |
2017 | * Now initiate a bus reset to have the changes take | |
ed568912 KH |
2018 | * effect. We clean up the old config rom memory and DMA |
2019 | * mappings in the bus reset tasklet, since the OHCI | |
2020 | * controller could need to access it before the bus reset | |
c781c06d KH |
2021 | * takes effect. |
2022 | */ | |
2dbd7d7e | 2023 | if (ret == 0) |
02d37bed | 2024 | fw_schedule_bus_reset(&ohci->card, true, true); |
4eaff7d6 SR |
2025 | else |
2026 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2027 | next_config_rom, next_config_rom_bus); | |
ed568912 | 2028 | |
2dbd7d7e | 2029 | return ret; |
ed568912 KH |
2030 | } |
2031 | ||
2032 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
2033 | { | |
2034 | struct fw_ohci *ohci = fw_ohci(card); | |
2035 | ||
2036 | at_context_transmit(&ohci->at_request_ctx, packet); | |
2037 | } | |
2038 | ||
2039 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
2040 | { | |
2041 | struct fw_ohci *ohci = fw_ohci(card); | |
2042 | ||
2043 | at_context_transmit(&ohci->at_response_ctx, packet); | |
2044 | } | |
2045 | ||
730c32f5 KH |
2046 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
2047 | { | |
2048 | struct fw_ohci *ohci = fw_ohci(card); | |
f319b6a0 KH |
2049 | struct context *ctx = &ohci->at_request_ctx; |
2050 | struct driver_data *driver_data = packet->driver_data; | |
2dbd7d7e | 2051 | int ret = -ENOENT; |
730c32f5 | 2052 | |
f319b6a0 | 2053 | tasklet_disable(&ctx->tasklet); |
730c32f5 | 2054 | |
f319b6a0 KH |
2055 | if (packet->ack != 0) |
2056 | goto out; | |
730c32f5 | 2057 | |
19593ffd | 2058 | if (packet->payload_mapped) |
1d1dc5e8 SR |
2059 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
2060 | packet->payload_length, DMA_TO_DEVICE); | |
2061 | ||
ad3c0fe8 | 2062 | log_ar_at_event('T', packet->speed, packet->header, 0x20); |
f319b6a0 KH |
2063 | driver_data->packet = NULL; |
2064 | packet->ack = RCODE_CANCELLED; | |
2065 | packet->callback(packet, &ohci->card, packet->ack); | |
2dbd7d7e | 2066 | ret = 0; |
f319b6a0 KH |
2067 | out: |
2068 | tasklet_enable(&ctx->tasklet); | |
730c32f5 | 2069 | |
2dbd7d7e | 2070 | return ret; |
730c32f5 KH |
2071 | } |
2072 | ||
53dca511 SR |
2073 | static int ohci_enable_phys_dma(struct fw_card *card, |
2074 | int node_id, int generation) | |
ed568912 | 2075 | { |
080de8c2 SR |
2076 | #ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA |
2077 | return 0; | |
2078 | #else | |
ed568912 KH |
2079 | struct fw_ohci *ohci = fw_ohci(card); |
2080 | unsigned long flags; | |
2dbd7d7e | 2081 | int n, ret = 0; |
ed568912 | 2082 | |
c781c06d KH |
2083 | /* |
2084 | * FIXME: Make sure this bitmask is cleared when we clear the busReset | |
2085 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. | |
2086 | */ | |
ed568912 KH |
2087 | |
2088 | spin_lock_irqsave(&ohci->lock, flags); | |
2089 | ||
2090 | if (ohci->generation != generation) { | |
2dbd7d7e | 2091 | ret = -ESTALE; |
ed568912 KH |
2092 | goto out; |
2093 | } | |
2094 | ||
c781c06d KH |
2095 | /* |
2096 | * Note, if the node ID contains a non-local bus ID, physical DMA is | |
2097 | * enabled for _all_ nodes on remote buses. | |
2098 | */ | |
907293d7 SR |
2099 | |
2100 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
2101 | if (n < 32) | |
2102 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
2103 | else | |
2104 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
2105 | ||
ed568912 | 2106 | flush_writes(ohci); |
ed568912 | 2107 | out: |
6cad95fe | 2108 | spin_unlock_irqrestore(&ohci->lock, flags); |
2dbd7d7e SR |
2109 | |
2110 | return ret; | |
080de8c2 | 2111 | #endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */ |
ed568912 | 2112 | } |
373b2edd | 2113 | |
0fcff4e3 | 2114 | static u32 ohci_read_csr(struct fw_card *card, int csr_offset) |
b677532b | 2115 | { |
60d32970 | 2116 | struct fw_ohci *ohci = fw_ohci(card); |
a48777e0 CL |
2117 | unsigned long flags; |
2118 | u32 value; | |
60d32970 CL |
2119 | |
2120 | switch (csr_offset) { | |
4ffb7a6a CL |
2121 | case CSR_STATE_CLEAR: |
2122 | case CSR_STATE_SET: | |
4ffb7a6a CL |
2123 | if (ohci->is_root && |
2124 | (reg_read(ohci, OHCI1394_LinkControlSet) & | |
2125 | OHCI1394_LinkControl_cycleMaster)) | |
c8a94ded | 2126 | value = CSR_STATE_BIT_CMSTR; |
4ffb7a6a | 2127 | else |
c8a94ded SR |
2128 | value = 0; |
2129 | if (ohci->csr_state_setclear_abdicate) | |
2130 | value |= CSR_STATE_BIT_ABDICATE; | |
b677532b | 2131 | |
c8a94ded | 2132 | return value; |
4a9bde9b | 2133 | |
506f1a31 CL |
2134 | case CSR_NODE_IDS: |
2135 | return reg_read(ohci, OHCI1394_NodeID) << 16; | |
2136 | ||
60d32970 CL |
2137 | case CSR_CYCLE_TIME: |
2138 | return get_cycle_time(ohci); | |
2139 | ||
a48777e0 CL |
2140 | case CSR_BUS_TIME: |
2141 | /* | |
2142 | * We might be called just after the cycle timer has wrapped | |
2143 | * around but just before the cycle64Seconds handler, so we | |
2144 | * better check here, too, if the bus time needs to be updated. | |
2145 | */ | |
2146 | spin_lock_irqsave(&ohci->lock, flags); | |
2147 | value = update_bus_time(ohci); | |
2148 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2149 | return value; | |
2150 | ||
27a2329f CL |
2151 | case CSR_BUSY_TIMEOUT: |
2152 | value = reg_read(ohci, OHCI1394_ATRetries); | |
2153 | return (value >> 4) & 0x0ffff00f; | |
2154 | ||
a1a1132b CL |
2155 | case CSR_PRIORITY_BUDGET: |
2156 | return (reg_read(ohci, OHCI1394_FairnessControl) & 0x3f) | | |
2157 | (ohci->pri_req_max << 8); | |
2158 | ||
60d32970 CL |
2159 | default: |
2160 | WARN_ON(1); | |
2161 | return 0; | |
2162 | } | |
b677532b CL |
2163 | } |
2164 | ||
0fcff4e3 | 2165 | static void ohci_write_csr(struct fw_card *card, int csr_offset, u32 value) |
d60d7f1d KH |
2166 | { |
2167 | struct fw_ohci *ohci = fw_ohci(card); | |
a48777e0 | 2168 | unsigned long flags; |
d60d7f1d | 2169 | |
506f1a31 | 2170 | switch (csr_offset) { |
4ffb7a6a | 2171 | case CSR_STATE_CLEAR: |
4ffb7a6a CL |
2172 | if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { |
2173 | reg_write(ohci, OHCI1394_LinkControlClear, | |
2174 | OHCI1394_LinkControl_cycleMaster); | |
2175 | flush_writes(ohci); | |
2176 | } | |
c8a94ded SR |
2177 | if (value & CSR_STATE_BIT_ABDICATE) |
2178 | ohci->csr_state_setclear_abdicate = false; | |
4ffb7a6a | 2179 | break; |
4a9bde9b | 2180 | |
4ffb7a6a CL |
2181 | case CSR_STATE_SET: |
2182 | if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { | |
2183 | reg_write(ohci, OHCI1394_LinkControlSet, | |
2184 | OHCI1394_LinkControl_cycleMaster); | |
2185 | flush_writes(ohci); | |
2186 | } | |
c8a94ded SR |
2187 | if (value & CSR_STATE_BIT_ABDICATE) |
2188 | ohci->csr_state_setclear_abdicate = true; | |
4ffb7a6a | 2189 | break; |
d60d7f1d | 2190 | |
506f1a31 CL |
2191 | case CSR_NODE_IDS: |
2192 | reg_write(ohci, OHCI1394_NodeID, value >> 16); | |
2193 | flush_writes(ohci); | |
2194 | break; | |
2195 | ||
9ab5071c CL |
2196 | case CSR_CYCLE_TIME: |
2197 | reg_write(ohci, OHCI1394_IsochronousCycleTimer, value); | |
2198 | reg_write(ohci, OHCI1394_IntEventSet, | |
2199 | OHCI1394_cycleInconsistent); | |
2200 | flush_writes(ohci); | |
2201 | break; | |
2202 | ||
a48777e0 CL |
2203 | case CSR_BUS_TIME: |
2204 | spin_lock_irqsave(&ohci->lock, flags); | |
2205 | ohci->bus_time = (ohci->bus_time & 0x7f) | (value & ~0x7f); | |
2206 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2207 | break; | |
2208 | ||
27a2329f CL |
2209 | case CSR_BUSY_TIMEOUT: |
2210 | value = (value & 0xf) | ((value & 0xf) << 4) | | |
2211 | ((value & 0xf) << 8) | ((value & 0x0ffff000) << 4); | |
2212 | reg_write(ohci, OHCI1394_ATRetries, value); | |
2213 | flush_writes(ohci); | |
2214 | break; | |
2215 | ||
a1a1132b CL |
2216 | case CSR_PRIORITY_BUDGET: |
2217 | reg_write(ohci, OHCI1394_FairnessControl, value & 0x3f); | |
2218 | flush_writes(ohci); | |
2219 | break; | |
2220 | ||
506f1a31 CL |
2221 | default: |
2222 | WARN_ON(1); | |
2223 | break; | |
2224 | } | |
d60d7f1d KH |
2225 | } |
2226 | ||
1aa292bb DM |
2227 | static void copy_iso_headers(struct iso_context *ctx, void *p) |
2228 | { | |
2229 | int i = ctx->header_length; | |
2230 | ||
2231 | if (i + ctx->base.header_size > PAGE_SIZE) | |
2232 | return; | |
2233 | ||
2234 | /* | |
2235 | * The iso header is byteswapped to little endian by | |
2236 | * the controller, but the remaining header quadlets | |
2237 | * are big endian. We want to present all the headers | |
2238 | * as big endian, so we have to swap the first quadlet. | |
2239 | */ | |
2240 | if (ctx->base.header_size > 0) | |
2241 | *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4)); | |
2242 | if (ctx->base.header_size > 4) | |
2243 | *(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p); | |
2244 | if (ctx->base.header_size > 8) | |
2245 | memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8); | |
2246 | ctx->header_length += ctx->base.header_size; | |
2247 | } | |
2248 | ||
a186b4a6 JW |
2249 | static int handle_ir_packet_per_buffer(struct context *context, |
2250 | struct descriptor *d, | |
2251 | struct descriptor *last) | |
2252 | { | |
2253 | struct iso_context *ctx = | |
2254 | container_of(context, struct iso_context, context); | |
bcee893c | 2255 | struct descriptor *pd; |
a186b4a6 | 2256 | __le32 *ir_header; |
bcee893c | 2257 | void *p; |
a186b4a6 | 2258 | |
872e330e | 2259 | for (pd = d; pd <= last; pd++) |
bcee893c DM |
2260 | if (pd->transfer_status) |
2261 | break; | |
bcee893c | 2262 | if (pd > last) |
a186b4a6 JW |
2263 | /* Descriptor(s) not done yet, stop iteration */ |
2264 | return 0; | |
2265 | ||
1aa292bb DM |
2266 | p = last + 1; |
2267 | copy_iso_headers(ctx, p); | |
a186b4a6 | 2268 | |
bcee893c DM |
2269 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { |
2270 | ir_header = (__le32 *) p; | |
872e330e SR |
2271 | ctx->base.callback.sc(&ctx->base, |
2272 | le32_to_cpu(ir_header[0]) & 0xffff, | |
2273 | ctx->header_length, ctx->header, | |
2274 | ctx->base.callback_data); | |
a186b4a6 JW |
2275 | ctx->header_length = 0; |
2276 | } | |
2277 | ||
a186b4a6 JW |
2278 | return 1; |
2279 | } | |
2280 | ||
872e330e SR |
2281 | /* d == last because each descriptor block is only a single descriptor. */ |
2282 | static int handle_ir_buffer_fill(struct context *context, | |
2283 | struct descriptor *d, | |
2284 | struct descriptor *last) | |
2285 | { | |
2286 | struct iso_context *ctx = | |
2287 | container_of(context, struct iso_context, context); | |
2288 | ||
2289 | if (!last->transfer_status) | |
2290 | /* Descriptor(s) not done yet, stop iteration */ | |
2291 | return 0; | |
2292 | ||
2293 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) | |
2294 | ctx->base.callback.mc(&ctx->base, | |
2295 | le32_to_cpu(last->data_address) + | |
2296 | le16_to_cpu(last->req_count) - | |
2297 | le16_to_cpu(last->res_count), | |
2298 | ctx->base.callback_data); | |
2299 | ||
2300 | return 1; | |
2301 | } | |
2302 | ||
30200739 KH |
2303 | static int handle_it_packet(struct context *context, |
2304 | struct descriptor *d, | |
2305 | struct descriptor *last) | |
ed568912 | 2306 | { |
30200739 KH |
2307 | struct iso_context *ctx = |
2308 | container_of(context, struct iso_context, context); | |
31769cef JF |
2309 | int i; |
2310 | struct descriptor *pd; | |
373b2edd | 2311 | |
31769cef JF |
2312 | for (pd = d; pd <= last; pd++) |
2313 | if (pd->transfer_status) | |
2314 | break; | |
2315 | if (pd > last) | |
2316 | /* Descriptor(s) not done yet, stop iteration */ | |
30200739 KH |
2317 | return 0; |
2318 | ||
31769cef JF |
2319 | i = ctx->header_length; |
2320 | if (i + 4 < PAGE_SIZE) { | |
2321 | /* Present this value as big-endian to match the receive code */ | |
2322 | *(__be32 *)(ctx->header + i) = cpu_to_be32( | |
2323 | ((u32)le16_to_cpu(pd->transfer_status) << 16) | | |
2324 | le16_to_cpu(pd->res_count)); | |
2325 | ctx->header_length += 4; | |
2326 | } | |
2327 | if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) { | |
872e330e SR |
2328 | ctx->base.callback.sc(&ctx->base, le16_to_cpu(last->res_count), |
2329 | ctx->header_length, ctx->header, | |
2330 | ctx->base.callback_data); | |
31769cef JF |
2331 | ctx->header_length = 0; |
2332 | } | |
30200739 | 2333 | return 1; |
ed568912 KH |
2334 | } |
2335 | ||
872e330e SR |
2336 | static void set_multichannel_mask(struct fw_ohci *ohci, u64 channels) |
2337 | { | |
2338 | u32 hi = channels >> 32, lo = channels; | |
2339 | ||
2340 | reg_write(ohci, OHCI1394_IRMultiChanMaskHiClear, ~hi); | |
2341 | reg_write(ohci, OHCI1394_IRMultiChanMaskLoClear, ~lo); | |
2342 | reg_write(ohci, OHCI1394_IRMultiChanMaskHiSet, hi); | |
2343 | reg_write(ohci, OHCI1394_IRMultiChanMaskLoSet, lo); | |
2344 | mmiowb(); | |
2345 | ohci->mc_channels = channels; | |
2346 | } | |
2347 | ||
53dca511 | 2348 | static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, |
4817ed24 | 2349 | int type, int channel, size_t header_size) |
ed568912 KH |
2350 | { |
2351 | struct fw_ohci *ohci = fw_ohci(card); | |
872e330e SR |
2352 | struct iso_context *uninitialized_var(ctx); |
2353 | descriptor_callback_t uninitialized_var(callback); | |
2354 | u64 *uninitialized_var(channels); | |
2355 | u32 *uninitialized_var(mask), uninitialized_var(regs); | |
ed568912 | 2356 | unsigned long flags; |
872e330e | 2357 | int index, ret = -EBUSY; |
ed568912 | 2358 | |
872e330e | 2359 | spin_lock_irqsave(&ohci->lock, flags); |
ed568912 | 2360 | |
872e330e SR |
2361 | switch (type) { |
2362 | case FW_ISO_CONTEXT_TRANSMIT: | |
2363 | mask = &ohci->it_context_mask; | |
30200739 | 2364 | callback = handle_it_packet; |
872e330e SR |
2365 | index = ffs(*mask) - 1; |
2366 | if (index >= 0) { | |
2367 | *mask &= ~(1 << index); | |
2368 | regs = OHCI1394_IsoXmitContextBase(index); | |
2369 | ctx = &ohci->it_context_list[index]; | |
2370 | } | |
2371 | break; | |
2372 | ||
2373 | case FW_ISO_CONTEXT_RECEIVE: | |
4817ed24 | 2374 | channels = &ohci->ir_context_channels; |
872e330e | 2375 | mask = &ohci->ir_context_mask; |
6498ba04 | 2376 | callback = handle_ir_packet_per_buffer; |
872e330e SR |
2377 | index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1; |
2378 | if (index >= 0) { | |
2379 | *channels &= ~(1ULL << channel); | |
2380 | *mask &= ~(1 << index); | |
2381 | regs = OHCI1394_IsoRcvContextBase(index); | |
2382 | ctx = &ohci->ir_context_list[index]; | |
2383 | } | |
2384 | break; | |
ed568912 | 2385 | |
872e330e SR |
2386 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: |
2387 | mask = &ohci->ir_context_mask; | |
2388 | callback = handle_ir_buffer_fill; | |
2389 | index = !ohci->mc_allocated ? ffs(*mask) - 1 : -1; | |
2390 | if (index >= 0) { | |
2391 | ohci->mc_allocated = true; | |
2392 | *mask &= ~(1 << index); | |
2393 | regs = OHCI1394_IsoRcvContextBase(index); | |
2394 | ctx = &ohci->ir_context_list[index]; | |
2395 | } | |
2396 | break; | |
2397 | ||
2398 | default: | |
2399 | index = -1; | |
2400 | ret = -ENOSYS; | |
4817ed24 | 2401 | } |
872e330e | 2402 | |
ed568912 KH |
2403 | spin_unlock_irqrestore(&ohci->lock, flags); |
2404 | ||
2405 | if (index < 0) | |
872e330e | 2406 | return ERR_PTR(ret); |
373b2edd | 2407 | |
2d826cc5 | 2408 | memset(ctx, 0, sizeof(*ctx)); |
9b32d5f3 KH |
2409 | ctx->header_length = 0; |
2410 | ctx->header = (void *) __get_free_page(GFP_KERNEL); | |
872e330e SR |
2411 | if (ctx->header == NULL) { |
2412 | ret = -ENOMEM; | |
9b32d5f3 | 2413 | goto out; |
872e330e | 2414 | } |
2dbd7d7e SR |
2415 | ret = context_init(&ctx->context, ohci, regs, callback); |
2416 | if (ret < 0) | |
9b32d5f3 | 2417 | goto out_with_header; |
ed568912 | 2418 | |
872e330e SR |
2419 | if (type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) |
2420 | set_multichannel_mask(ohci, 0); | |
2421 | ||
ed568912 | 2422 | return &ctx->base; |
9b32d5f3 KH |
2423 | |
2424 | out_with_header: | |
2425 | free_page((unsigned long)ctx->header); | |
2426 | out: | |
2427 | spin_lock_irqsave(&ohci->lock, flags); | |
872e330e SR |
2428 | |
2429 | switch (type) { | |
2430 | case FW_ISO_CONTEXT_RECEIVE: | |
2431 | *channels |= 1ULL << channel; | |
2432 | break; | |
2433 | ||
2434 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2435 | ohci->mc_allocated = false; | |
2436 | break; | |
2437 | } | |
9b32d5f3 | 2438 | *mask |= 1 << index; |
872e330e | 2439 | |
9b32d5f3 KH |
2440 | spin_unlock_irqrestore(&ohci->lock, flags); |
2441 | ||
2dbd7d7e | 2442 | return ERR_PTR(ret); |
ed568912 KH |
2443 | } |
2444 | ||
eb0306ea KH |
2445 | static int ohci_start_iso(struct fw_iso_context *base, |
2446 | s32 cycle, u32 sync, u32 tags) | |
ed568912 | 2447 | { |
373b2edd | 2448 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 2449 | struct fw_ohci *ohci = ctx->context.ohci; |
872e330e | 2450 | u32 control = IR_CONTEXT_ISOCH_HEADER, match; |
ed568912 KH |
2451 | int index; |
2452 | ||
872e330e SR |
2453 | switch (ctx->base.type) { |
2454 | case FW_ISO_CONTEXT_TRANSMIT: | |
295e3feb | 2455 | index = ctx - ohci->it_context_list; |
8a2f7d93 KH |
2456 | match = 0; |
2457 | if (cycle >= 0) | |
2458 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | | |
295e3feb | 2459 | (cycle & 0x7fff) << 16; |
21efb3cf | 2460 | |
295e3feb KH |
2461 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
2462 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
8a2f7d93 | 2463 | context_run(&ctx->context, match); |
872e330e SR |
2464 | break; |
2465 | ||
2466 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2467 | control |= IR_CONTEXT_BUFFER_FILL|IR_CONTEXT_MULTI_CHANNEL_MODE; | |
2468 | /* fall through */ | |
2469 | case FW_ISO_CONTEXT_RECEIVE: | |
295e3feb | 2470 | index = ctx - ohci->ir_context_list; |
8a2f7d93 KH |
2471 | match = (tags << 28) | (sync << 8) | ctx->base.channel; |
2472 | if (cycle >= 0) { | |
2473 | match |= (cycle & 0x07fff) << 12; | |
2474 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; | |
2475 | } | |
ed568912 | 2476 | |
295e3feb KH |
2477 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
2478 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); | |
a77754a7 | 2479 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
8a2f7d93 | 2480 | context_run(&ctx->context, control); |
872e330e | 2481 | break; |
295e3feb | 2482 | } |
ed568912 KH |
2483 | |
2484 | return 0; | |
2485 | } | |
2486 | ||
b8295668 KH |
2487 | static int ohci_stop_iso(struct fw_iso_context *base) |
2488 | { | |
2489 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2490 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
b8295668 KH |
2491 | int index; |
2492 | ||
872e330e SR |
2493 | switch (ctx->base.type) { |
2494 | case FW_ISO_CONTEXT_TRANSMIT: | |
b8295668 KH |
2495 | index = ctx - ohci->it_context_list; |
2496 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
872e330e SR |
2497 | break; |
2498 | ||
2499 | case FW_ISO_CONTEXT_RECEIVE: | |
2500 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
b8295668 KH |
2501 | index = ctx - ohci->ir_context_list; |
2502 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
872e330e | 2503 | break; |
b8295668 KH |
2504 | } |
2505 | flush_writes(ohci); | |
2506 | context_stop(&ctx->context); | |
2507 | ||
2508 | return 0; | |
2509 | } | |
2510 | ||
ed568912 KH |
2511 | static void ohci_free_iso_context(struct fw_iso_context *base) |
2512 | { | |
2513 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 2514 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
ed568912 KH |
2515 | unsigned long flags; |
2516 | int index; | |
2517 | ||
b8295668 KH |
2518 | ohci_stop_iso(base); |
2519 | context_release(&ctx->context); | |
9b32d5f3 | 2520 | free_page((unsigned long)ctx->header); |
b8295668 | 2521 | |
ed568912 KH |
2522 | spin_lock_irqsave(&ohci->lock, flags); |
2523 | ||
872e330e SR |
2524 | switch (base->type) { |
2525 | case FW_ISO_CONTEXT_TRANSMIT: | |
ed568912 | 2526 | index = ctx - ohci->it_context_list; |
ed568912 | 2527 | ohci->it_context_mask |= 1 << index; |
872e330e SR |
2528 | break; |
2529 | ||
2530 | case FW_ISO_CONTEXT_RECEIVE: | |
ed568912 | 2531 | index = ctx - ohci->ir_context_list; |
ed568912 | 2532 | ohci->ir_context_mask |= 1 << index; |
4817ed24 | 2533 | ohci->ir_context_channels |= 1ULL << base->channel; |
872e330e SR |
2534 | break; |
2535 | ||
2536 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2537 | index = ctx - ohci->ir_context_list; | |
2538 | ohci->ir_context_mask |= 1 << index; | |
2539 | ohci->ir_context_channels |= ohci->mc_channels; | |
2540 | ohci->mc_channels = 0; | |
2541 | ohci->mc_allocated = false; | |
2542 | break; | |
ed568912 | 2543 | } |
ed568912 KH |
2544 | |
2545 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2546 | } | |
2547 | ||
872e330e SR |
2548 | static int ohci_set_iso_channels(struct fw_iso_context *base, u64 *channels) |
2549 | { | |
2550 | struct fw_ohci *ohci = fw_ohci(base->card); | |
2551 | unsigned long flags; | |
2552 | int ret; | |
2553 | ||
2554 | switch (base->type) { | |
2555 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2556 | ||
2557 | spin_lock_irqsave(&ohci->lock, flags); | |
2558 | ||
2559 | /* Don't allow multichannel to grab other contexts' channels. */ | |
2560 | if (~ohci->ir_context_channels & ~ohci->mc_channels & *channels) { | |
2561 | *channels = ohci->ir_context_channels; | |
2562 | ret = -EBUSY; | |
2563 | } else { | |
2564 | set_multichannel_mask(ohci, *channels); | |
2565 | ret = 0; | |
2566 | } | |
2567 | ||
2568 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2569 | ||
2570 | break; | |
2571 | default: | |
2572 | ret = -EINVAL; | |
2573 | } | |
2574 | ||
2575 | return ret; | |
2576 | } | |
2577 | ||
2578 | static int queue_iso_transmit(struct iso_context *ctx, | |
2579 | struct fw_iso_packet *packet, | |
2580 | struct fw_iso_buffer *buffer, | |
2581 | unsigned long payload) | |
ed568912 | 2582 | { |
30200739 | 2583 | struct descriptor *d, *last, *pd; |
ed568912 KH |
2584 | struct fw_iso_packet *p; |
2585 | __le32 *header; | |
9aad8125 | 2586 | dma_addr_t d_bus, page_bus; |
ed568912 KH |
2587 | u32 z, header_z, payload_z, irq; |
2588 | u32 payload_index, payload_end_index, next_page_index; | |
30200739 | 2589 | int page, end_page, i, length, offset; |
ed568912 | 2590 | |
ed568912 | 2591 | p = packet; |
9aad8125 | 2592 | payload_index = payload; |
ed568912 KH |
2593 | |
2594 | if (p->skip) | |
2595 | z = 1; | |
2596 | else | |
2597 | z = 2; | |
2598 | if (p->header_length > 0) | |
2599 | z++; | |
2600 | ||
2601 | /* Determine the first page the payload isn't contained in. */ | |
2602 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
2603 | if (p->payload_length > 0) | |
2604 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
2605 | else | |
2606 | payload_z = 0; | |
2607 | ||
2608 | z += payload_z; | |
2609 | ||
2610 | /* Get header size in number of descriptors. */ | |
2d826cc5 | 2611 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
ed568912 | 2612 | |
30200739 KH |
2613 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
2614 | if (d == NULL) | |
2615 | return -ENOMEM; | |
ed568912 KH |
2616 | |
2617 | if (!p->skip) { | |
a77754a7 | 2618 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
ed568912 | 2619 | d[0].req_count = cpu_to_le16(8); |
7f51a100 CL |
2620 | /* |
2621 | * Link the skip address to this descriptor itself. This causes | |
2622 | * a context to skip a cycle whenever lost cycles or FIFO | |
2623 | * overruns occur, without dropping the data. The application | |
2624 | * should then decide whether this is an error condition or not. | |
2625 | * FIXME: Make the context's cycle-lost behaviour configurable? | |
2626 | */ | |
2627 | d[0].branch_address = cpu_to_le32(d_bus | z); | |
ed568912 KH |
2628 | |
2629 | header = (__le32 *) &d[1]; | |
a77754a7 KH |
2630 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
2631 | IT_HEADER_TAG(p->tag) | | |
2632 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | | |
2633 | IT_HEADER_CHANNEL(ctx->base.channel) | | |
2634 | IT_HEADER_SPEED(ctx->base.speed)); | |
ed568912 | 2635 | header[1] = |
a77754a7 | 2636 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
ed568912 KH |
2637 | p->payload_length)); |
2638 | } | |
2639 | ||
2640 | if (p->header_length > 0) { | |
2641 | d[2].req_count = cpu_to_le16(p->header_length); | |
2d826cc5 | 2642 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
ed568912 KH |
2643 | memcpy(&d[z], p->header, p->header_length); |
2644 | } | |
2645 | ||
2646 | pd = d + z - payload_z; | |
2647 | payload_end_index = payload_index + p->payload_length; | |
2648 | for (i = 0; i < payload_z; i++) { | |
2649 | page = payload_index >> PAGE_SHIFT; | |
2650 | offset = payload_index & ~PAGE_MASK; | |
2651 | next_page_index = (page + 1) << PAGE_SHIFT; | |
2652 | length = | |
2653 | min(next_page_index, payload_end_index) - payload_index; | |
2654 | pd[i].req_count = cpu_to_le16(length); | |
9aad8125 KH |
2655 | |
2656 | page_bus = page_private(buffer->pages[page]); | |
2657 | pd[i].data_address = cpu_to_le32(page_bus + offset); | |
ed568912 KH |
2658 | |
2659 | payload_index += length; | |
2660 | } | |
2661 | ||
ed568912 | 2662 | if (p->interrupt) |
a77754a7 | 2663 | irq = DESCRIPTOR_IRQ_ALWAYS; |
ed568912 | 2664 | else |
a77754a7 | 2665 | irq = DESCRIPTOR_NO_IRQ; |
ed568912 | 2666 | |
30200739 | 2667 | last = z == 2 ? d : d + z - 1; |
a77754a7 KH |
2668 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
2669 | DESCRIPTOR_STATUS | | |
2670 | DESCRIPTOR_BRANCH_ALWAYS | | |
cbb59da7 | 2671 | irq); |
ed568912 | 2672 | |
30200739 | 2673 | context_append(&ctx->context, d, z, header_z); |
ed568912 KH |
2674 | |
2675 | return 0; | |
2676 | } | |
373b2edd | 2677 | |
872e330e SR |
2678 | static int queue_iso_packet_per_buffer(struct iso_context *ctx, |
2679 | struct fw_iso_packet *packet, | |
2680 | struct fw_iso_buffer *buffer, | |
2681 | unsigned long payload) | |
a186b4a6 | 2682 | { |
8c0c0cc2 | 2683 | struct descriptor *d, *pd; |
a186b4a6 JW |
2684 | dma_addr_t d_bus, page_bus; |
2685 | u32 z, header_z, rest; | |
bcee893c DM |
2686 | int i, j, length; |
2687 | int page, offset, packet_count, header_size, payload_per_buffer; | |
a186b4a6 JW |
2688 | |
2689 | /* | |
1aa292bb DM |
2690 | * The OHCI controller puts the isochronous header and trailer in the |
2691 | * buffer, so we need at least 8 bytes. | |
a186b4a6 | 2692 | */ |
872e330e | 2693 | packet_count = packet->header_length / ctx->base.header_size; |
1aa292bb | 2694 | header_size = max(ctx->base.header_size, (size_t)8); |
a186b4a6 JW |
2695 | |
2696 | /* Get header size in number of descriptors. */ | |
2697 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); | |
2698 | page = payload >> PAGE_SHIFT; | |
2699 | offset = payload & ~PAGE_MASK; | |
872e330e | 2700 | payload_per_buffer = packet->payload_length / packet_count; |
a186b4a6 JW |
2701 | |
2702 | for (i = 0; i < packet_count; i++) { | |
2703 | /* d points to the header descriptor */ | |
bcee893c | 2704 | z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1; |
a186b4a6 | 2705 | d = context_get_descriptors(&ctx->context, |
bcee893c | 2706 | z + header_z, &d_bus); |
a186b4a6 JW |
2707 | if (d == NULL) |
2708 | return -ENOMEM; | |
2709 | ||
bcee893c DM |
2710 | d->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2711 | DESCRIPTOR_INPUT_MORE); | |
872e330e | 2712 | if (packet->skip && i == 0) |
bcee893c | 2713 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); |
a186b4a6 JW |
2714 | d->req_count = cpu_to_le16(header_size); |
2715 | d->res_count = d->req_count; | |
bcee893c | 2716 | d->transfer_status = 0; |
a186b4a6 JW |
2717 | d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d))); |
2718 | ||
bcee893c | 2719 | rest = payload_per_buffer; |
8c0c0cc2 | 2720 | pd = d; |
bcee893c | 2721 | for (j = 1; j < z; j++) { |
8c0c0cc2 | 2722 | pd++; |
bcee893c DM |
2723 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2724 | DESCRIPTOR_INPUT_MORE); | |
2725 | ||
2726 | if (offset + rest < PAGE_SIZE) | |
2727 | length = rest; | |
2728 | else | |
2729 | length = PAGE_SIZE - offset; | |
2730 | pd->req_count = cpu_to_le16(length); | |
2731 | pd->res_count = pd->req_count; | |
2732 | pd->transfer_status = 0; | |
2733 | ||
2734 | page_bus = page_private(buffer->pages[page]); | |
2735 | pd->data_address = cpu_to_le32(page_bus + offset); | |
2736 | ||
2737 | offset = (offset + length) & ~PAGE_MASK; | |
2738 | rest -= length; | |
2739 | if (offset == 0) | |
2740 | page++; | |
2741 | } | |
a186b4a6 JW |
2742 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
2743 | DESCRIPTOR_INPUT_LAST | | |
2744 | DESCRIPTOR_BRANCH_ALWAYS); | |
872e330e | 2745 | if (packet->interrupt && i == packet_count - 1) |
a186b4a6 JW |
2746 | pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
2747 | ||
a186b4a6 JW |
2748 | context_append(&ctx->context, d, z, header_z); |
2749 | } | |
2750 | ||
2751 | return 0; | |
2752 | } | |
2753 | ||
872e330e SR |
2754 | static int queue_iso_buffer_fill(struct iso_context *ctx, |
2755 | struct fw_iso_packet *packet, | |
2756 | struct fw_iso_buffer *buffer, | |
2757 | unsigned long payload) | |
2758 | { | |
2759 | struct descriptor *d; | |
2760 | dma_addr_t d_bus, page_bus; | |
2761 | int page, offset, rest, z, i, length; | |
2762 | ||
2763 | page = payload >> PAGE_SHIFT; | |
2764 | offset = payload & ~PAGE_MASK; | |
2765 | rest = packet->payload_length; | |
2766 | ||
2767 | /* We need one descriptor for each page in the buffer. */ | |
2768 | z = DIV_ROUND_UP(offset + rest, PAGE_SIZE); | |
2769 | ||
2770 | if (WARN_ON(offset & 3 || rest & 3 || page + z > buffer->page_count)) | |
2771 | return -EFAULT; | |
2772 | ||
2773 | for (i = 0; i < z; i++) { | |
2774 | d = context_get_descriptors(&ctx->context, 1, &d_bus); | |
2775 | if (d == NULL) | |
2776 | return -ENOMEM; | |
2777 | ||
2778 | d->control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | | |
2779 | DESCRIPTOR_BRANCH_ALWAYS); | |
2780 | if (packet->skip && i == 0) | |
2781 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
2782 | if (packet->interrupt && i == z - 1) | |
2783 | d->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); | |
2784 | ||
2785 | if (offset + rest < PAGE_SIZE) | |
2786 | length = rest; | |
2787 | else | |
2788 | length = PAGE_SIZE - offset; | |
2789 | d->req_count = cpu_to_le16(length); | |
2790 | d->res_count = d->req_count; | |
2791 | d->transfer_status = 0; | |
2792 | ||
2793 | page_bus = page_private(buffer->pages[page]); | |
2794 | d->data_address = cpu_to_le32(page_bus + offset); | |
2795 | ||
2796 | rest -= length; | |
2797 | offset = 0; | |
2798 | page++; | |
2799 | ||
2800 | context_append(&ctx->context, d, 1, 0); | |
2801 | } | |
2802 | ||
2803 | return 0; | |
2804 | } | |
2805 | ||
53dca511 SR |
2806 | static int ohci_queue_iso(struct fw_iso_context *base, |
2807 | struct fw_iso_packet *packet, | |
2808 | struct fw_iso_buffer *buffer, | |
2809 | unsigned long payload) | |
295e3feb | 2810 | { |
e364cf4e | 2811 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
fe5ca634 | 2812 | unsigned long flags; |
872e330e | 2813 | int ret = -ENOSYS; |
e364cf4e | 2814 | |
fe5ca634 | 2815 | spin_lock_irqsave(&ctx->context.ohci->lock, flags); |
872e330e SR |
2816 | switch (base->type) { |
2817 | case FW_ISO_CONTEXT_TRANSMIT: | |
2818 | ret = queue_iso_transmit(ctx, packet, buffer, payload); | |
2819 | break; | |
2820 | case FW_ISO_CONTEXT_RECEIVE: | |
2821 | ret = queue_iso_packet_per_buffer(ctx, packet, buffer, payload); | |
2822 | break; | |
2823 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
2824 | ret = queue_iso_buffer_fill(ctx, packet, buffer, payload); | |
2825 | break; | |
2826 | } | |
fe5ca634 DM |
2827 | spin_unlock_irqrestore(&ctx->context.ohci->lock, flags); |
2828 | ||
2dbd7d7e | 2829 | return ret; |
295e3feb KH |
2830 | } |
2831 | ||
21ebcd12 | 2832 | static const struct fw_card_driver ohci_driver = { |
ed568912 | 2833 | .enable = ohci_enable, |
02d37bed | 2834 | .read_phy_reg = ohci_read_phy_reg, |
ed568912 KH |
2835 | .update_phy_reg = ohci_update_phy_reg, |
2836 | .set_config_rom = ohci_set_config_rom, | |
2837 | .send_request = ohci_send_request, | |
2838 | .send_response = ohci_send_response, | |
730c32f5 | 2839 | .cancel_packet = ohci_cancel_packet, |
ed568912 | 2840 | .enable_phys_dma = ohci_enable_phys_dma, |
0fcff4e3 SR |
2841 | .read_csr = ohci_read_csr, |
2842 | .write_csr = ohci_write_csr, | |
ed568912 KH |
2843 | |
2844 | .allocate_iso_context = ohci_allocate_iso_context, | |
2845 | .free_iso_context = ohci_free_iso_context, | |
872e330e | 2846 | .set_iso_channels = ohci_set_iso_channels, |
ed568912 | 2847 | .queue_iso = ohci_queue_iso, |
69cdb726 | 2848 | .start_iso = ohci_start_iso, |
b8295668 | 2849 | .stop_iso = ohci_stop_iso, |
ed568912 KH |
2850 | }; |
2851 | ||
ea8d006b | 2852 | #ifdef CONFIG_PPC_PMAC |
5da3dac8 | 2853 | static void pmac_ohci_on(struct pci_dev *dev) |
2ed0f181 | 2854 | { |
ea8d006b SR |
2855 | if (machine_is(powermac)) { |
2856 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2857 | ||
2858 | if (ofn) { | |
2859 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); | |
2860 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
2861 | } | |
2862 | } | |
2ed0f181 SR |
2863 | } |
2864 | ||
5da3dac8 | 2865 | static void pmac_ohci_off(struct pci_dev *dev) |
2ed0f181 SR |
2866 | { |
2867 | if (machine_is(powermac)) { | |
2868 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
2869 | ||
2870 | if (ofn) { | |
2871 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
2872 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); | |
2873 | } | |
2874 | } | |
2875 | } | |
2876 | #else | |
5da3dac8 SR |
2877 | static inline void pmac_ohci_on(struct pci_dev *dev) {} |
2878 | static inline void pmac_ohci_off(struct pci_dev *dev) {} | |
ea8d006b SR |
2879 | #endif /* CONFIG_PPC_PMAC */ |
2880 | ||
53dca511 SR |
2881 | static int __devinit pci_probe(struct pci_dev *dev, |
2882 | const struct pci_device_id *ent) | |
2ed0f181 SR |
2883 | { |
2884 | struct fw_ohci *ohci; | |
aa0170ff | 2885 | u32 bus_options, max_receive, link_speed, version; |
2ed0f181 | 2886 | u64 guid; |
6fdb2ee2 | 2887 | int i, err, n_ir, n_it; |
2ed0f181 SR |
2888 | size_t size; |
2889 | ||
2d826cc5 | 2890 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
ed568912 | 2891 | if (ohci == NULL) { |
7007a076 SR |
2892 | err = -ENOMEM; |
2893 | goto fail; | |
ed568912 KH |
2894 | } |
2895 | ||
2896 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
2897 | ||
5da3dac8 | 2898 | pmac_ohci_on(dev); |
130d5496 | 2899 | |
d79406dd KH |
2900 | err = pci_enable_device(dev); |
2901 | if (err) { | |
7007a076 | 2902 | fw_error("Failed to enable OHCI hardware\n"); |
bd7dee63 | 2903 | goto fail_free; |
ed568912 KH |
2904 | } |
2905 | ||
2906 | pci_set_master(dev); | |
2907 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
2908 | pci_set_drvdata(dev, ohci); | |
2909 | ||
2910 | spin_lock_init(&ohci->lock); | |
02d37bed | 2911 | mutex_init(&ohci->phy_reg_mutex); |
ed568912 KH |
2912 | |
2913 | tasklet_init(&ohci->bus_reset_tasklet, | |
2914 | bus_reset_tasklet, (unsigned long)ohci); | |
2915 | ||
d79406dd KH |
2916 | err = pci_request_region(dev, 0, ohci_driver_name); |
2917 | if (err) { | |
ed568912 | 2918 | fw_error("MMIO resource unavailable\n"); |
d79406dd | 2919 | goto fail_disable; |
ed568912 KH |
2920 | } |
2921 | ||
2922 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
2923 | if (ohci->registers == NULL) { | |
2924 | fw_error("Failed to remap registers\n"); | |
d79406dd KH |
2925 | err = -ENXIO; |
2926 | goto fail_iomem; | |
ed568912 KH |
2927 | } |
2928 | ||
4a635593 SR |
2929 | for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++) |
2930 | if (ohci_quirks[i].vendor == dev->vendor && | |
2931 | (ohci_quirks[i].device == dev->device || | |
2932 | ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) { | |
2933 | ohci->quirks = ohci_quirks[i].flags; | |
2934 | break; | |
2935 | } | |
3e9cc2f3 SR |
2936 | if (param_quirks) |
2937 | ohci->quirks = param_quirks; | |
b677532b | 2938 | |
ed568912 KH |
2939 | ar_context_init(&ohci->ar_request_ctx, ohci, |
2940 | OHCI1394_AsReqRcvContextControlSet); | |
2941 | ||
2942 | ar_context_init(&ohci->ar_response_ctx, ohci, | |
2943 | OHCI1394_AsRspRcvContextControlSet); | |
2944 | ||
fe5ca634 | 2945 | context_init(&ohci->at_request_ctx, ohci, |
f319b6a0 | 2946 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); |
ed568912 | 2947 | |
fe5ca634 | 2948 | context_init(&ohci->at_response_ctx, ohci, |
f319b6a0 | 2949 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); |
ed568912 | 2950 | |
ed568912 | 2951 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
4802f16d SR |
2952 | ohci->ir_context_channels = ~0ULL; |
2953 | ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); | |
ed568912 | 2954 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); |
6fdb2ee2 SR |
2955 | n_ir = hweight32(ohci->ir_context_mask); |
2956 | size = sizeof(struct iso_context) * n_ir; | |
4802f16d | 2957 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
2958 | |
2959 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
4802f16d | 2960 | ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); |
ed568912 | 2961 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); |
6fdb2ee2 SR |
2962 | n_it = hweight32(ohci->it_context_mask); |
2963 | size = sizeof(struct iso_context) * n_it; | |
4802f16d | 2964 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
2965 | |
2966 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
d79406dd | 2967 | err = -ENOMEM; |
7007a076 | 2968 | goto fail_contexts; |
ed568912 KH |
2969 | } |
2970 | ||
2971 | /* self-id dma buffer allocation */ | |
2972 | ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device, | |
2973 | SELF_ID_BUF_SIZE, | |
2974 | &ohci->self_id_bus, | |
2975 | GFP_KERNEL); | |
2976 | if (ohci->self_id_cpu == NULL) { | |
d79406dd | 2977 | err = -ENOMEM; |
7007a076 | 2978 | goto fail_contexts; |
ed568912 KH |
2979 | } |
2980 | ||
ed568912 KH |
2981 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
2982 | max_receive = (bus_options >> 12) & 0xf; | |
2983 | link_speed = bus_options & 0x7; | |
2984 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
2985 | reg_read(ohci, OHCI1394_GUIDLo); | |
2986 | ||
d79406dd | 2987 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
e1eff7a3 | 2988 | if (err) |
d79406dd | 2989 | goto fail_self_id; |
ed568912 | 2990 | |
6fdb2ee2 SR |
2991 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
2992 | fw_notify("Added fw-ohci device %s, OHCI v%x.%x, " | |
2993 | "%d IR + %d IT contexts, quirks 0x%x\n", | |
2994 | dev_name(&dev->dev), version >> 16, version & 0xff, | |
2995 | n_ir, n_it, ohci->quirks); | |
e1eff7a3 | 2996 | |
ed568912 | 2997 | return 0; |
d79406dd KH |
2998 | |
2999 | fail_self_id: | |
3000 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, | |
3001 | ohci->self_id_cpu, ohci->self_id_bus); | |
7007a076 | 3002 | fail_contexts: |
d79406dd | 3003 | kfree(ohci->ir_context_list); |
7007a076 SR |
3004 | kfree(ohci->it_context_list); |
3005 | context_release(&ohci->at_response_ctx); | |
3006 | context_release(&ohci->at_request_ctx); | |
3007 | ar_context_release(&ohci->ar_response_ctx); | |
3008 | ar_context_release(&ohci->ar_request_ctx); | |
d79406dd KH |
3009 | pci_iounmap(dev, ohci->registers); |
3010 | fail_iomem: | |
3011 | pci_release_region(dev, 0); | |
3012 | fail_disable: | |
3013 | pci_disable_device(dev); | |
bd7dee63 SR |
3014 | fail_free: |
3015 | kfree(&ohci->card); | |
5da3dac8 | 3016 | pmac_ohci_off(dev); |
7007a076 SR |
3017 | fail: |
3018 | if (err == -ENOMEM) | |
3019 | fw_error("Out of memory\n"); | |
d79406dd KH |
3020 | |
3021 | return err; | |
ed568912 KH |
3022 | } |
3023 | ||
3024 | static void pci_remove(struct pci_dev *dev) | |
3025 | { | |
3026 | struct fw_ohci *ohci; | |
3027 | ||
3028 | ohci = pci_get_drvdata(dev); | |
e254a4b4 KH |
3029 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); |
3030 | flush_writes(ohci); | |
ed568912 KH |
3031 | fw_core_remove_card(&ohci->card); |
3032 | ||
c781c06d KH |
3033 | /* |
3034 | * FIXME: Fail all pending packets here, now that the upper | |
3035 | * layers can't queue any more. | |
3036 | */ | |
ed568912 KH |
3037 | |
3038 | software_reset(ohci); | |
3039 | free_irq(dev->irq, ohci); | |
a55709ba JF |
3040 | |
3041 | if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom) | |
3042 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
3043 | ohci->next_config_rom, ohci->next_config_rom_bus); | |
3044 | if (ohci->config_rom) | |
3045 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
3046 | ohci->config_rom, ohci->config_rom_bus); | |
d79406dd KH |
3047 | dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE, |
3048 | ohci->self_id_cpu, ohci->self_id_bus); | |
a55709ba JF |
3049 | ar_context_release(&ohci->ar_request_ctx); |
3050 | ar_context_release(&ohci->ar_response_ctx); | |
3051 | context_release(&ohci->at_request_ctx); | |
3052 | context_release(&ohci->at_response_ctx); | |
d79406dd KH |
3053 | kfree(ohci->it_context_list); |
3054 | kfree(ohci->ir_context_list); | |
262444ee | 3055 | pci_disable_msi(dev); |
d79406dd KH |
3056 | pci_iounmap(dev, ohci->registers); |
3057 | pci_release_region(dev, 0); | |
3058 | pci_disable_device(dev); | |
bd7dee63 | 3059 | kfree(&ohci->card); |
5da3dac8 | 3060 | pmac_ohci_off(dev); |
ea8d006b | 3061 | |
ed568912 KH |
3062 | fw_notify("Removed fw-ohci device.\n"); |
3063 | } | |
3064 | ||
2aef469a | 3065 | #ifdef CONFIG_PM |
2ed0f181 | 3066 | static int pci_suspend(struct pci_dev *dev, pm_message_t state) |
2aef469a | 3067 | { |
2ed0f181 | 3068 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
3069 | int err; |
3070 | ||
3071 | software_reset(ohci); | |
2ed0f181 | 3072 | free_irq(dev->irq, ohci); |
262444ee | 3073 | pci_disable_msi(dev); |
2ed0f181 | 3074 | err = pci_save_state(dev); |
2aef469a | 3075 | if (err) { |
8a8cea27 | 3076 | fw_error("pci_save_state failed\n"); |
2aef469a KH |
3077 | return err; |
3078 | } | |
2ed0f181 | 3079 | err = pci_set_power_state(dev, pci_choose_state(dev, state)); |
55111428 SR |
3080 | if (err) |
3081 | fw_error("pci_set_power_state failed with %d\n", err); | |
5da3dac8 | 3082 | pmac_ohci_off(dev); |
ea8d006b | 3083 | |
2aef469a KH |
3084 | return 0; |
3085 | } | |
3086 | ||
2ed0f181 | 3087 | static int pci_resume(struct pci_dev *dev) |
2aef469a | 3088 | { |
2ed0f181 | 3089 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
3090 | int err; |
3091 | ||
5da3dac8 | 3092 | pmac_ohci_on(dev); |
2ed0f181 SR |
3093 | pci_set_power_state(dev, PCI_D0); |
3094 | pci_restore_state(dev); | |
3095 | err = pci_enable_device(dev); | |
2aef469a | 3096 | if (err) { |
8a8cea27 | 3097 | fw_error("pci_enable_device failed\n"); |
2aef469a KH |
3098 | return err; |
3099 | } | |
3100 | ||
0bd243c4 | 3101 | return ohci_enable(&ohci->card, NULL, 0); |
2aef469a KH |
3102 | } |
3103 | #endif | |
3104 | ||
a67483d2 | 3105 | static const struct pci_device_id pci_table[] = { |
ed568912 KH |
3106 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, |
3107 | { } | |
3108 | }; | |
3109 | ||
3110 | MODULE_DEVICE_TABLE(pci, pci_table); | |
3111 | ||
3112 | static struct pci_driver fw_ohci_pci_driver = { | |
3113 | .name = ohci_driver_name, | |
3114 | .id_table = pci_table, | |
3115 | .probe = pci_probe, | |
3116 | .remove = pci_remove, | |
2aef469a KH |
3117 | #ifdef CONFIG_PM |
3118 | .resume = pci_resume, | |
3119 | .suspend = pci_suspend, | |
3120 | #endif | |
ed568912 KH |
3121 | }; |
3122 | ||
3123 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
3124 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
3125 | MODULE_LICENSE("GPL"); | |
3126 | ||
1e4c7b0d OH |
3127 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
3128 | #ifndef CONFIG_IEEE1394_OHCI1394_MODULE | |
3129 | MODULE_ALIAS("ohci1394"); | |
3130 | #endif | |
3131 | ||
ed568912 KH |
3132 | static int __init fw_ohci_init(void) |
3133 | { | |
3134 | return pci_register_driver(&fw_ohci_pci_driver); | |
3135 | } | |
3136 | ||
3137 | static void __exit fw_ohci_cleanup(void) | |
3138 | { | |
3139 | pci_unregister_driver(&fw_ohci_pci_driver); | |
3140 | } | |
3141 | ||
3142 | module_init(fw_ohci_init); | |
3143 | module_exit(fw_ohci_cleanup); |