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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c781c06d KH |
2 | /* |
3 | * Driver for OHCI 1394 controllers | |
ed568912 | 4 | * |
ed568912 | 5 | * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net> |
ed568912 KH |
6 | */ |
7 | ||
dd23736e | 8 | #include <linux/bitops.h> |
65b2742a | 9 | #include <linux/bug.h> |
e524f616 | 10 | #include <linux/compiler.h> |
ed568912 | 11 | #include <linux/delay.h> |
e8ca9702 | 12 | #include <linux/device.h> |
cf3e72fd | 13 | #include <linux/dma-mapping.h> |
77c9a5da | 14 | #include <linux/firewire.h> |
e8ca9702 | 15 | #include <linux/firewire-constants.h> |
a7fb60db SR |
16 | #include <linux/init.h> |
17 | #include <linux/interrupt.h> | |
e8ca9702 | 18 | #include <linux/io.h> |
a7fb60db | 19 | #include <linux/kernel.h> |
e8ca9702 | 20 | #include <linux/list.h> |
faa2fb4e | 21 | #include <linux/mm.h> |
a7fb60db | 22 | #include <linux/module.h> |
ad3c0fe8 | 23 | #include <linux/moduleparam.h> |
02d37bed | 24 | #include <linux/mutex.h> |
a7fb60db | 25 | #include <linux/pci.h> |
fc383796 | 26 | #include <linux/pci_ids.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
c26f0234 | 28 | #include <linux/spinlock.h> |
e8ca9702 | 29 | #include <linux/string.h> |
e78483c5 | 30 | #include <linux/time.h> |
7a39d8b8 | 31 | #include <linux/vmalloc.h> |
2d7a36e2 | 32 | #include <linux/workqueue.h> |
cf3e72fd | 33 | |
e8ca9702 | 34 | #include <asm/byteorder.h> |
c26f0234 | 35 | #include <asm/page.h> |
ed568912 | 36 | |
ea8d006b SR |
37 | #ifdef CONFIG_PPC_PMAC |
38 | #include <asm/pmac_feature.h> | |
39 | #endif | |
40 | ||
77c9a5da SR |
41 | #include "core.h" |
42 | #include "ohci.h" | |
ed568912 | 43 | |
de97cb64 PH |
44 | #define ohci_info(ohci, f, args...) dev_info(ohci->card.device, f, ##args) |
45 | #define ohci_notice(ohci, f, args...) dev_notice(ohci->card.device, f, ##args) | |
46 | #define ohci_err(ohci, f, args...) dev_err(ohci->card.device, f, ##args) | |
47 | ||
a77754a7 KH |
48 | #define DESCRIPTOR_OUTPUT_MORE 0 |
49 | #define DESCRIPTOR_OUTPUT_LAST (1 << 12) | |
50 | #define DESCRIPTOR_INPUT_MORE (2 << 12) | |
51 | #define DESCRIPTOR_INPUT_LAST (3 << 12) | |
52 | #define DESCRIPTOR_STATUS (1 << 11) | |
53 | #define DESCRIPTOR_KEY_IMMEDIATE (2 << 8) | |
54 | #define DESCRIPTOR_PING (1 << 7) | |
55 | #define DESCRIPTOR_YY (1 << 6) | |
56 | #define DESCRIPTOR_NO_IRQ (0 << 4) | |
57 | #define DESCRIPTOR_IRQ_ERROR (1 << 4) | |
58 | #define DESCRIPTOR_IRQ_ALWAYS (3 << 4) | |
59 | #define DESCRIPTOR_BRANCH_ALWAYS (3 << 2) | |
60 | #define DESCRIPTOR_WAIT (3 << 0) | |
ed568912 | 61 | |
be8dcab9 AL |
62 | #define DESCRIPTOR_CMD (0xf << 12) |
63 | ||
ed568912 KH |
64 | struct descriptor { |
65 | __le16 req_count; | |
66 | __le16 control; | |
67 | __le32 data_address; | |
68 | __le32 branch_address; | |
69 | __le16 res_count; | |
70 | __le16 transfer_status; | |
71 | } __attribute__((aligned(16))); | |
72 | ||
a77754a7 KH |
73 | #define CONTROL_SET(regs) (regs) |
74 | #define CONTROL_CLEAR(regs) ((regs) + 4) | |
75 | #define COMMAND_PTR(regs) ((regs) + 12) | |
76 | #define CONTEXT_MATCH(regs) ((regs) + 16) | |
72e318e0 | 77 | |
7a39d8b8 CL |
78 | #define AR_BUFFER_SIZE (32*1024) |
79 | #define AR_BUFFERS_MIN DIV_ROUND_UP(AR_BUFFER_SIZE, PAGE_SIZE) | |
80 | /* we need at least two pages for proper list management */ | |
81 | #define AR_BUFFERS (AR_BUFFERS_MIN >= 2 ? AR_BUFFERS_MIN : 2) | |
82 | ||
83 | #define MAX_ASYNC_PAYLOAD 4096 | |
84 | #define MAX_AR_PACKET_SIZE (16 + MAX_ASYNC_PAYLOAD + 4) | |
85 | #define AR_WRAPAROUND_PAGES DIV_ROUND_UP(MAX_AR_PACKET_SIZE, PAGE_SIZE) | |
ed568912 | 86 | |
32b46093 KH |
87 | struct ar_context { |
88 | struct fw_ohci *ohci; | |
7a39d8b8 CL |
89 | struct page *pages[AR_BUFFERS]; |
90 | void *buffer; | |
91 | struct descriptor *descriptors; | |
92 | dma_addr_t descriptors_bus; | |
32b46093 | 93 | void *pointer; |
7a39d8b8 | 94 | unsigned int last_buffer_index; |
72e318e0 | 95 | u32 regs; |
ed568912 KH |
96 | struct tasklet_struct tasklet; |
97 | }; | |
98 | ||
30200739 KH |
99 | struct context; |
100 | ||
101 | typedef int (*descriptor_callback_t)(struct context *ctx, | |
102 | struct descriptor *d, | |
103 | struct descriptor *last); | |
fe5ca634 DM |
104 | |
105 | /* | |
106 | * A buffer that contains a block of DMA-able coherent memory used for | |
107 | * storing a portion of a DMA descriptor program. | |
108 | */ | |
109 | struct descriptor_buffer { | |
110 | struct list_head list; | |
111 | dma_addr_t buffer_bus; | |
112 | size_t buffer_size; | |
113 | size_t used; | |
114 | struct descriptor buffer[0]; | |
115 | }; | |
116 | ||
30200739 | 117 | struct context { |
373b2edd | 118 | struct fw_ohci *ohci; |
30200739 | 119 | u32 regs; |
fe5ca634 | 120 | int total_allocation; |
a572e688 | 121 | u32 current_bus; |
386a4153 | 122 | bool running; |
82b662dc | 123 | bool flushing; |
373b2edd | 124 | |
fe5ca634 DM |
125 | /* |
126 | * List of page-sized buffers for storing DMA descriptors. | |
127 | * Head of list contains buffers in use and tail of list contains | |
128 | * free buffers. | |
129 | */ | |
130 | struct list_head buffer_list; | |
131 | ||
132 | /* | |
133 | * Pointer to a buffer inside buffer_list that contains the tail | |
134 | * end of the current DMA program. | |
135 | */ | |
136 | struct descriptor_buffer *buffer_tail; | |
137 | ||
138 | /* | |
139 | * The descriptor containing the branch address of the first | |
140 | * descriptor that has not yet been filled by the device. | |
141 | */ | |
142 | struct descriptor *last; | |
143 | ||
144 | /* | |
be8dcab9 | 145 | * The last descriptor block in the DMA program. It contains the branch |
fe5ca634 DM |
146 | * address that must be updated upon appending a new descriptor. |
147 | */ | |
148 | struct descriptor *prev; | |
be8dcab9 | 149 | int prev_z; |
30200739 KH |
150 | |
151 | descriptor_callback_t callback; | |
152 | ||
373b2edd | 153 | struct tasklet_struct tasklet; |
30200739 | 154 | }; |
30200739 | 155 | |
a77754a7 KH |
156 | #define IT_HEADER_SY(v) ((v) << 0) |
157 | #define IT_HEADER_TCODE(v) ((v) << 4) | |
158 | #define IT_HEADER_CHANNEL(v) ((v) << 8) | |
159 | #define IT_HEADER_TAG(v) ((v) << 14) | |
160 | #define IT_HEADER_SPEED(v) ((v) << 16) | |
161 | #define IT_HEADER_DATA_LENGTH(v) ((v) << 16) | |
ed568912 KH |
162 | |
163 | struct iso_context { | |
164 | struct fw_iso_context base; | |
30200739 | 165 | struct context context; |
9b32d5f3 KH |
166 | void *header; |
167 | size_t header_length; | |
d1bbd209 CL |
168 | unsigned long flushing_completions; |
169 | u32 mc_buffer_bus; | |
170 | u16 mc_completed; | |
910e76c6 | 171 | u16 last_timestamp; |
dd23736e ML |
172 | u8 sync; |
173 | u8 tags; | |
ed568912 KH |
174 | }; |
175 | ||
176 | #define CONFIG_ROM_SIZE 1024 | |
177 | ||
178 | struct fw_ohci { | |
179 | struct fw_card card; | |
180 | ||
181 | __iomem char *registers; | |
e636fe25 | 182 | int node_id; |
ed568912 | 183 | int generation; |
e09770db | 184 | int request_generation; /* for timestamping incoming requests */ |
4a635593 | 185 | unsigned quirks; |
a1a1132b | 186 | unsigned int pri_req_max; |
a48777e0 | 187 | u32 bus_time; |
9d60ef2b | 188 | bool bus_time_running; |
4ffb7a6a | 189 | bool is_root; |
c8a94ded | 190 | bool csr_state_setclear_abdicate; |
dd23736e ML |
191 | int n_ir; |
192 | int n_it; | |
c781c06d KH |
193 | /* |
194 | * Spinlock for accessing fw_ohci data. Never call out of | |
195 | * this driver with this lock held. | |
196 | */ | |
ed568912 | 197 | spinlock_t lock; |
ed568912 | 198 | |
02d37bed SR |
199 | struct mutex phy_reg_mutex; |
200 | ||
ec766a79 CL |
201 | void *misc_buffer; |
202 | dma_addr_t misc_buffer_bus; | |
203 | ||
ed568912 KH |
204 | struct ar_context ar_request_ctx; |
205 | struct ar_context ar_response_ctx; | |
f319b6a0 KH |
206 | struct context at_request_ctx; |
207 | struct context at_response_ctx; | |
ed568912 | 208 | |
f117a3e3 | 209 | u32 it_context_support; |
872e330e | 210 | u32 it_context_mask; /* unoccupied IT contexts */ |
ed568912 | 211 | struct iso_context *it_context_list; |
872e330e | 212 | u64 ir_context_channels; /* unoccupied channels */ |
f117a3e3 | 213 | u32 ir_context_support; |
872e330e | 214 | u32 ir_context_mask; /* unoccupied IR contexts */ |
ed568912 | 215 | struct iso_context *ir_context_list; |
872e330e SR |
216 | u64 mc_channels; /* channels in use by the multichannel IR context */ |
217 | bool mc_allocated; | |
ecb1cf9c SR |
218 | |
219 | __be32 *config_rom; | |
220 | dma_addr_t config_rom_bus; | |
221 | __be32 *next_config_rom; | |
222 | dma_addr_t next_config_rom_bus; | |
223 | __be32 next_header; | |
224 | ||
af53122a | 225 | __le32 *self_id; |
ecb1cf9c | 226 | dma_addr_t self_id_bus; |
2d7a36e2 | 227 | struct work_struct bus_reset_work; |
ecb1cf9c SR |
228 | |
229 | u32 self_id_buffer[512]; | |
ed568912 KH |
230 | }; |
231 | ||
db9ae8fe SG |
232 | static struct workqueue_struct *selfid_workqueue; |
233 | ||
95688e97 | 234 | static inline struct fw_ohci *fw_ohci(struct fw_card *card) |
ed568912 KH |
235 | { |
236 | return container_of(card, struct fw_ohci, card); | |
237 | } | |
238 | ||
295e3feb KH |
239 | #define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000 |
240 | #define IR_CONTEXT_BUFFER_FILL 0x80000000 | |
241 | #define IR_CONTEXT_ISOCH_HEADER 0x40000000 | |
242 | #define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000 | |
243 | #define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000 | |
244 | #define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000 | |
ed568912 KH |
245 | |
246 | #define CONTEXT_RUN 0x8000 | |
247 | #define CONTEXT_WAKE 0x1000 | |
248 | #define CONTEXT_DEAD 0x0800 | |
249 | #define CONTEXT_ACTIVE 0x0400 | |
250 | ||
8b7b6afa | 251 | #define OHCI1394_MAX_AT_REQ_RETRIES 0xf |
ed568912 KH |
252 | #define OHCI1394_MAX_AT_RESP_RETRIES 0x2 |
253 | #define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8 | |
254 | ||
ed568912 | 255 | #define OHCI1394_REGISTER_SIZE 0x800 |
ed568912 KH |
256 | #define OHCI1394_PCI_HCI_Control 0x40 |
257 | #define SELF_ID_BUF_SIZE 0x800 | |
32b46093 | 258 | #define OHCI_TCODE_PHY_PACKET 0x0e |
e364cf4e | 259 | #define OHCI_VERSION_1_1 0x010010 |
0edeefd9 | 260 | |
ed568912 KH |
261 | static char ohci_driver_name[] = KBUILD_MODNAME; |
262 | ||
0dbe15f8 | 263 | #define PCI_VENDOR_ID_PINNACLE_SYSTEMS 0x11bd |
9993e0fe | 264 | #define PCI_DEVICE_ID_AGERE_FW643 0x5901 |
d1bb399a | 265 | #define PCI_DEVICE_ID_CREATIVE_SB1394 0x4001 |
262444ee | 266 | #define PCI_DEVICE_ID_JMICRON_JMB38X_FW 0x2380 |
8301b91b | 267 | #define PCI_DEVICE_ID_TI_TSB12LV22 0x8009 |
25935ebe SG |
268 | #define PCI_DEVICE_ID_TI_TSB12LV26 0x8020 |
269 | #define PCI_DEVICE_ID_TI_TSB82AA2 0x8025 | |
be8dcab9 | 270 | #define PCI_DEVICE_ID_VIA_VT630X 0x3044 |
be8dcab9 | 271 | #define PCI_REV_ID_VIA_VT6306 0x46 |
d151f985 | 272 | #define PCI_DEVICE_ID_VIA_VT6315 0x3403 |
8301b91b | 273 | |
0dbe15f8 SR |
274 | #define QUIRK_CYCLE_TIMER 0x1 |
275 | #define QUIRK_RESET_PACKET 0x2 | |
276 | #define QUIRK_BE_HEADERS 0x4 | |
277 | #define QUIRK_NO_1394A 0x8 | |
278 | #define QUIRK_NO_MSI 0x10 | |
279 | #define QUIRK_TI_SLLZ059 0x20 | |
280 | #define QUIRK_IR_WAKE 0x40 | |
4a635593 SR |
281 | |
282 | /* In case of multiple matches in ohci_quirks[], only the first one is used. */ | |
283 | static const struct { | |
9993e0fe | 284 | unsigned short vendor, device, revision, flags; |
4a635593 | 285 | } ohci_quirks[] = { |
9993e0fe SR |
286 | {PCI_VENDOR_ID_AL, PCI_ANY_ID, PCI_ANY_ID, |
287 | QUIRK_CYCLE_TIMER}, | |
288 | ||
289 | {PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, PCI_ANY_ID, | |
290 | QUIRK_BE_HEADERS}, | |
291 | ||
292 | {PCI_VENDOR_ID_ATT, PCI_DEVICE_ID_AGERE_FW643, 6, | |
0ca49345 | 293 | QUIRK_NO_MSI}, |
9993e0fe | 294 | |
d1bb399a CL |
295 | {PCI_VENDOR_ID_CREATIVE, PCI_DEVICE_ID_CREATIVE_SB1394, PCI_ANY_ID, |
296 | QUIRK_RESET_PACKET}, | |
297 | ||
9993e0fe SR |
298 | {PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_FW, PCI_ANY_ID, |
299 | QUIRK_NO_MSI}, | |
300 | ||
301 | {PCI_VENDOR_ID_NEC, PCI_ANY_ID, PCI_ANY_ID, | |
302 | QUIRK_CYCLE_TIMER}, | |
303 | ||
f39aa30d ML |
304 | {PCI_VENDOR_ID_O2, PCI_ANY_ID, PCI_ANY_ID, |
305 | QUIRK_NO_MSI}, | |
306 | ||
9993e0fe | 307 | {PCI_VENDOR_ID_RICOH, PCI_ANY_ID, PCI_ANY_ID, |
320cfa6c | 308 | QUIRK_CYCLE_TIMER | QUIRK_NO_MSI}, |
9993e0fe SR |
309 | |
310 | {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV22, PCI_ANY_ID, | |
311 | QUIRK_CYCLE_TIMER | QUIRK_RESET_PACKET | QUIRK_NO_1394A}, | |
312 | ||
25935ebe SG |
313 | {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB12LV26, PCI_ANY_ID, |
314 | QUIRK_RESET_PACKET | QUIRK_TI_SLLZ059}, | |
315 | ||
316 | {PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_TSB82AA2, PCI_ANY_ID, | |
317 | QUIRK_RESET_PACKET | QUIRK_TI_SLLZ059}, | |
318 | ||
9993e0fe SR |
319 | {PCI_VENDOR_ID_TI, PCI_ANY_ID, PCI_ANY_ID, |
320 | QUIRK_RESET_PACKET}, | |
321 | ||
be8dcab9 AL |
322 | {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT630X, PCI_REV_ID_VIA_VT6306, |
323 | QUIRK_CYCLE_TIMER | QUIRK_IR_WAKE}, | |
324 | ||
d151f985 | 325 | {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT6315, 0, |
d584a662 | 326 | QUIRK_CYCLE_TIMER /* FIXME: necessary? */ | QUIRK_NO_MSI}, |
d151f985 SR |
327 | |
328 | {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT6315, PCI_ANY_ID, | |
d584a662 | 329 | QUIRK_NO_MSI}, |
d151f985 | 330 | |
9993e0fe SR |
331 | {PCI_VENDOR_ID_VIA, PCI_ANY_ID, PCI_ANY_ID, |
332 | QUIRK_CYCLE_TIMER | QUIRK_NO_MSI}, | |
4a635593 SR |
333 | }; |
334 | ||
3e9cc2f3 SR |
335 | /* This overrides anything that was found in ohci_quirks[]. */ |
336 | static int param_quirks; | |
337 | module_param_named(quirks, param_quirks, int, 0644); | |
338 | MODULE_PARM_DESC(quirks, "Chip quirks (default = 0" | |
339 | ", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER) | |
340 | ", reset packet generation = " __stringify(QUIRK_RESET_PACKET) | |
8a168ca7 | 341 | ", AR/selfID endianness = " __stringify(QUIRK_BE_HEADERS) |
925e7a65 | 342 | ", no 1394a enhancements = " __stringify(QUIRK_NO_1394A) |
262444ee | 343 | ", disable MSI = " __stringify(QUIRK_NO_MSI) |
28897fb7 | 344 | ", TI SLLZ059 erratum = " __stringify(QUIRK_TI_SLLZ059) |
be8dcab9 | 345 | ", IR wake unreliable = " __stringify(QUIRK_IR_WAKE) |
3e9cc2f3 SR |
346 | ")"); |
347 | ||
a007bb85 | 348 | #define OHCI_PARAM_DEBUG_AT_AR 1 |
ad3c0fe8 | 349 | #define OHCI_PARAM_DEBUG_SELFIDS 2 |
a007bb85 SR |
350 | #define OHCI_PARAM_DEBUG_IRQS 4 |
351 | #define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */ | |
ad3c0fe8 SR |
352 | |
353 | static int param_debug; | |
354 | module_param_named(debug, param_debug, int, 0644); | |
355 | MODULE_PARM_DESC(debug, "Verbose logging (default = 0" | |
ad3c0fe8 | 356 | ", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR) |
a007bb85 SR |
357 | ", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS) |
358 | ", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS) | |
359 | ", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS) | |
ad3c0fe8 SR |
360 | ", or a combination, or all = -1)"); |
361 | ||
8bc588e0 LR |
362 | static bool param_remote_dma; |
363 | module_param_named(remote_dma, param_remote_dma, bool, 0444); | |
364 | MODULE_PARM_DESC(remote_dma, "Enable unfiltered remote DMA (default = N)"); | |
365 | ||
64d21720 | 366 | static void log_irqs(struct fw_ohci *ohci, u32 evt) |
ad3c0fe8 | 367 | { |
a007bb85 SR |
368 | if (likely(!(param_debug & |
369 | (OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS)))) | |
370 | return; | |
371 | ||
372 | if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) && | |
373 | !(evt & OHCI1394_busReset)) | |
ad3c0fe8 SR |
374 | return; |
375 | ||
de97cb64 | 376 | ohci_notice(ohci, "IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt, |
161b96e7 SR |
377 | evt & OHCI1394_selfIDComplete ? " selfID" : "", |
378 | evt & OHCI1394_RQPkt ? " AR_req" : "", | |
379 | evt & OHCI1394_RSPkt ? " AR_resp" : "", | |
380 | evt & OHCI1394_reqTxComplete ? " AT_req" : "", | |
381 | evt & OHCI1394_respTxComplete ? " AT_resp" : "", | |
382 | evt & OHCI1394_isochRx ? " IR" : "", | |
383 | evt & OHCI1394_isochTx ? " IT" : "", | |
384 | evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "", | |
385 | evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "", | |
a48777e0 | 386 | evt & OHCI1394_cycle64Seconds ? " cycle64Seconds" : "", |
5ed1f321 | 387 | evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "", |
161b96e7 | 388 | evt & OHCI1394_regAccessFail ? " regAccessFail" : "", |
f117a3e3 | 389 | evt & OHCI1394_unrecoverableError ? " unrecoverableError" : "", |
161b96e7 SR |
390 | evt & OHCI1394_busReset ? " busReset" : "", |
391 | evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt | | |
392 | OHCI1394_RSPkt | OHCI1394_reqTxComplete | | |
393 | OHCI1394_respTxComplete | OHCI1394_isochRx | | |
394 | OHCI1394_isochTx | OHCI1394_postedWriteErr | | |
a48777e0 CL |
395 | OHCI1394_cycleTooLong | OHCI1394_cycle64Seconds | |
396 | OHCI1394_cycleInconsistent | | |
161b96e7 | 397 | OHCI1394_regAccessFail | OHCI1394_busReset) |
ad3c0fe8 SR |
398 | ? " ?" : ""); |
399 | } | |
400 | ||
401 | static const char *speed[] = { | |
402 | [0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta", | |
403 | }; | |
404 | static const char *power[] = { | |
405 | [0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W", | |
406 | [4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W", | |
407 | }; | |
408 | static const char port[] = { '.', '-', 'p', 'c', }; | |
409 | ||
410 | static char _p(u32 *s, int shift) | |
411 | { | |
412 | return port[*s >> shift & 3]; | |
413 | } | |
414 | ||
64d21720 | 415 | static void log_selfids(struct fw_ohci *ohci, int generation, int self_id_count) |
ad3c0fe8 | 416 | { |
64d21720 SR |
417 | u32 *s; |
418 | ||
ad3c0fe8 SR |
419 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS))) |
420 | return; | |
421 | ||
de97cb64 PH |
422 | ohci_notice(ohci, "%d selfIDs, generation %d, local node ID %04x\n", |
423 | self_id_count, generation, ohci->node_id); | |
ad3c0fe8 | 424 | |
64d21720 | 425 | for (s = ohci->self_id_buffer; self_id_count--; ++s) |
ad3c0fe8 | 426 | if ((*s & 1 << 23) == 0) |
de97cb64 PH |
427 | ohci_notice(ohci, |
428 | "selfID 0: %08x, phy %d [%c%c%c] %s gc=%d %s %s%s%s\n", | |
161b96e7 SR |
429 | *s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2), |
430 | speed[*s >> 14 & 3], *s >> 16 & 63, | |
431 | power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "", | |
432 | *s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : ""); | |
ad3c0fe8 | 433 | else |
de97cb64 | 434 | ohci_notice(ohci, |
64d21720 | 435 | "selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n", |
161b96e7 SR |
436 | *s, *s >> 24 & 63, |
437 | _p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10), | |
438 | _p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2)); | |
ad3c0fe8 SR |
439 | } |
440 | ||
441 | static const char *evts[] = { | |
442 | [0x00] = "evt_no_status", [0x01] = "-reserved-", | |
443 | [0x02] = "evt_long_packet", [0x03] = "evt_missing_ack", | |
444 | [0x04] = "evt_underrun", [0x05] = "evt_overrun", | |
445 | [0x06] = "evt_descriptor_read", [0x07] = "evt_data_read", | |
446 | [0x08] = "evt_data_write", [0x09] = "evt_bus_reset", | |
447 | [0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err", | |
448 | [0x0c] = "-reserved-", [0x0d] = "-reserved-", | |
449 | [0x0e] = "evt_unknown", [0x0f] = "evt_flushed", | |
450 | [0x10] = "-reserved-", [0x11] = "ack_complete", | |
451 | [0x12] = "ack_pending ", [0x13] = "-reserved-", | |
452 | [0x14] = "ack_busy_X", [0x15] = "ack_busy_A", | |
453 | [0x16] = "ack_busy_B", [0x17] = "-reserved-", | |
454 | [0x18] = "-reserved-", [0x19] = "-reserved-", | |
455 | [0x1a] = "-reserved-", [0x1b] = "ack_tardy", | |
456 | [0x1c] = "-reserved-", [0x1d] = "ack_data_error", | |
457 | [0x1e] = "ack_type_error", [0x1f] = "-reserved-", | |
458 | [0x20] = "pending/cancelled", | |
459 | }; | |
460 | static const char *tcodes[] = { | |
461 | [0x0] = "QW req", [0x1] = "BW req", | |
462 | [0x2] = "W resp", [0x3] = "-reserved-", | |
463 | [0x4] = "QR req", [0x5] = "BR req", | |
464 | [0x6] = "QR resp", [0x7] = "BR resp", | |
465 | [0x8] = "cycle start", [0x9] = "Lk req", | |
466 | [0xa] = "async stream packet", [0xb] = "Lk resp", | |
467 | [0xc] = "-reserved-", [0xd] = "-reserved-", | |
468 | [0xe] = "link internal", [0xf] = "-reserved-", | |
469 | }; | |
ad3c0fe8 | 470 | |
64d21720 SR |
471 | static void log_ar_at_event(struct fw_ohci *ohci, |
472 | char dir, int speed, u32 *header, int evt) | |
ad3c0fe8 SR |
473 | { |
474 | int tcode = header[0] >> 4 & 0xf; | |
475 | char specific[12]; | |
476 | ||
477 | if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR))) | |
478 | return; | |
479 | ||
480 | if (unlikely(evt >= ARRAY_SIZE(evts))) | |
481 | evt = 0x1f; | |
482 | ||
08ddb2f4 | 483 | if (evt == OHCI1394_evt_bus_reset) { |
de97cb64 PH |
484 | ohci_notice(ohci, "A%c evt_bus_reset, generation %d\n", |
485 | dir, (header[2] >> 16) & 0xff); | |
08ddb2f4 SR |
486 | return; |
487 | } | |
488 | ||
ad3c0fe8 SR |
489 | switch (tcode) { |
490 | case 0x0: case 0x6: case 0x8: | |
491 | snprintf(specific, sizeof(specific), " = %08x", | |
492 | be32_to_cpu((__force __be32)header[3])); | |
493 | break; | |
494 | case 0x1: case 0x5: case 0x7: case 0x9: case 0xb: | |
495 | snprintf(specific, sizeof(specific), " %x,%x", | |
496 | header[3] >> 16, header[3] & 0xffff); | |
497 | break; | |
498 | default: | |
499 | specific[0] = '\0'; | |
500 | } | |
501 | ||
502 | switch (tcode) { | |
5b06db16 | 503 | case 0xa: |
de97cb64 PH |
504 | ohci_notice(ohci, "A%c %s, %s\n", |
505 | dir, evts[evt], tcodes[tcode]); | |
ad3c0fe8 | 506 | break; |
5b06db16 | 507 | case 0xe: |
de97cb64 PH |
508 | ohci_notice(ohci, "A%c %s, PHY %08x %08x\n", |
509 | dir, evts[evt], header[1], header[2]); | |
5b06db16 | 510 | break; |
ad3c0fe8 | 511 | case 0x0: case 0x1: case 0x4: case 0x5: case 0x9: |
de97cb64 PH |
512 | ohci_notice(ohci, |
513 | "A%c spd %x tl %02x, %04x -> %04x, %s, %s, %04x%08x%s\n", | |
514 | dir, speed, header[0] >> 10 & 0x3f, | |
515 | header[1] >> 16, header[0] >> 16, evts[evt], | |
516 | tcodes[tcode], header[1] & 0xffff, header[2], specific); | |
ad3c0fe8 SR |
517 | break; |
518 | default: | |
de97cb64 PH |
519 | ohci_notice(ohci, |
520 | "A%c spd %x tl %02x, %04x -> %04x, %s, %s%s\n", | |
521 | dir, speed, header[0] >> 10 & 0x3f, | |
522 | header[1] >> 16, header[0] >> 16, evts[evt], | |
523 | tcodes[tcode], specific); | |
ad3c0fe8 SR |
524 | } |
525 | } | |
526 | ||
95688e97 | 527 | static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data) |
ed568912 KH |
528 | { |
529 | writel(data, ohci->registers + offset); | |
530 | } | |
531 | ||
95688e97 | 532 | static inline u32 reg_read(const struct fw_ohci *ohci, int offset) |
ed568912 KH |
533 | { |
534 | return readl(ohci->registers + offset); | |
535 | } | |
536 | ||
95688e97 | 537 | static inline void flush_writes(const struct fw_ohci *ohci) |
ed568912 KH |
538 | { |
539 | /* Do a dummy read to flush writes. */ | |
540 | reg_read(ohci, OHCI1394_Version); | |
541 | } | |
542 | ||
b14c369d SR |
543 | /* |
544 | * Beware! read_phy_reg(), write_phy_reg(), update_phy_reg(), and | |
545 | * read_paged_phy_reg() require the caller to hold ohci->phy_reg_mutex. | |
546 | * In other words, only use ohci_read_phy_reg() and ohci_update_phy_reg() | |
547 | * directly. Exceptions are intrinsically serialized contexts like pci_probe. | |
548 | */ | |
35d999b1 | 549 | static int read_phy_reg(struct fw_ohci *ohci, int addr) |
ed568912 | 550 | { |
4a96b4fc | 551 | u32 val; |
35d999b1 | 552 | int i; |
ed568912 KH |
553 | |
554 | reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr)); | |
153e3979 | 555 | for (i = 0; i < 3 + 100; i++) { |
35d999b1 | 556 | val = reg_read(ohci, OHCI1394_PhyControl); |
215fa444 SR |
557 | if (!~val) |
558 | return -ENODEV; /* Card was ejected. */ | |
559 | ||
35d999b1 SR |
560 | if (val & OHCI1394_PhyControl_ReadDone) |
561 | return OHCI1394_PhyControl_ReadData(val); | |
562 | ||
153e3979 CL |
563 | /* |
564 | * Try a few times without waiting. Sleeping is necessary | |
565 | * only when the link/PHY interface is busy. | |
566 | */ | |
567 | if (i >= 3) | |
568 | msleep(1); | |
ed568912 | 569 | } |
6fe9efb9 PH |
570 | ohci_err(ohci, "failed to read phy reg %d\n", addr); |
571 | dump_stack(); | |
ed568912 | 572 | |
35d999b1 SR |
573 | return -EBUSY; |
574 | } | |
4a96b4fc | 575 | |
35d999b1 SR |
576 | static int write_phy_reg(const struct fw_ohci *ohci, int addr, u32 val) |
577 | { | |
578 | int i; | |
ed568912 | 579 | |
ed568912 | 580 | reg_write(ohci, OHCI1394_PhyControl, |
35d999b1 | 581 | OHCI1394_PhyControl_Write(addr, val)); |
153e3979 | 582 | for (i = 0; i < 3 + 100; i++) { |
35d999b1 | 583 | val = reg_read(ohci, OHCI1394_PhyControl); |
215fa444 SR |
584 | if (!~val) |
585 | return -ENODEV; /* Card was ejected. */ | |
586 | ||
35d999b1 SR |
587 | if (!(val & OHCI1394_PhyControl_WritePending)) |
588 | return 0; | |
ed568912 | 589 | |
153e3979 CL |
590 | if (i >= 3) |
591 | msleep(1); | |
35d999b1 | 592 | } |
6fe9efb9 PH |
593 | ohci_err(ohci, "failed to write phy reg %d, val %u\n", addr, val); |
594 | dump_stack(); | |
35d999b1 SR |
595 | |
596 | return -EBUSY; | |
4a96b4fc CL |
597 | } |
598 | ||
02d37bed SR |
599 | static int update_phy_reg(struct fw_ohci *ohci, int addr, |
600 | int clear_bits, int set_bits) | |
4a96b4fc | 601 | { |
02d37bed | 602 | int ret = read_phy_reg(ohci, addr); |
35d999b1 SR |
603 | if (ret < 0) |
604 | return ret; | |
4a96b4fc | 605 | |
e7014dad CL |
606 | /* |
607 | * The interrupt status bits are cleared by writing a one bit. | |
608 | * Avoid clearing them unless explicitly requested in set_bits. | |
609 | */ | |
610 | if (addr == 5) | |
611 | clear_bits |= PHY_INT_STATUS_BITS; | |
612 | ||
35d999b1 | 613 | return write_phy_reg(ohci, addr, (ret & ~clear_bits) | set_bits); |
ed568912 KH |
614 | } |
615 | ||
35d999b1 | 616 | static int read_paged_phy_reg(struct fw_ohci *ohci, int page, int addr) |
925e7a65 | 617 | { |
35d999b1 | 618 | int ret; |
925e7a65 | 619 | |
02d37bed | 620 | ret = update_phy_reg(ohci, 7, PHY_PAGE_SELECT, page << 5); |
35d999b1 SR |
621 | if (ret < 0) |
622 | return ret; | |
925e7a65 | 623 | |
35d999b1 | 624 | return read_phy_reg(ohci, addr); |
ed568912 KH |
625 | } |
626 | ||
02d37bed SR |
627 | static int ohci_read_phy_reg(struct fw_card *card, int addr) |
628 | { | |
629 | struct fw_ohci *ohci = fw_ohci(card); | |
630 | int ret; | |
631 | ||
632 | mutex_lock(&ohci->phy_reg_mutex); | |
633 | ret = read_phy_reg(ohci, addr); | |
634 | mutex_unlock(&ohci->phy_reg_mutex); | |
635 | ||
636 | return ret; | |
637 | } | |
638 | ||
639 | static int ohci_update_phy_reg(struct fw_card *card, int addr, | |
640 | int clear_bits, int set_bits) | |
641 | { | |
642 | struct fw_ohci *ohci = fw_ohci(card); | |
643 | int ret; | |
644 | ||
645 | mutex_lock(&ohci->phy_reg_mutex); | |
646 | ret = update_phy_reg(ohci, addr, clear_bits, set_bits); | |
647 | mutex_unlock(&ohci->phy_reg_mutex); | |
648 | ||
649 | return ret; | |
ed568912 KH |
650 | } |
651 | ||
7a39d8b8 CL |
652 | static inline dma_addr_t ar_buffer_bus(struct ar_context *ctx, unsigned int i) |
653 | { | |
654 | return page_private(ctx->pages[i]); | |
655 | } | |
656 | ||
657 | static void ar_context_link_page(struct ar_context *ctx, unsigned int index) | |
ed568912 | 658 | { |
7a39d8b8 | 659 | struct descriptor *d; |
32b46093 | 660 | |
7a39d8b8 CL |
661 | d = &ctx->descriptors[index]; |
662 | d->branch_address &= cpu_to_le32(~0xf); | |
663 | d->res_count = cpu_to_le16(PAGE_SIZE); | |
664 | d->transfer_status = 0; | |
32b46093 | 665 | |
071595eb | 666 | wmb(); /* finish init of new descriptors before branch_address update */ |
7a39d8b8 CL |
667 | d = &ctx->descriptors[ctx->last_buffer_index]; |
668 | d->branch_address |= cpu_to_le32(1); | |
669 | ||
670 | ctx->last_buffer_index = index; | |
32b46093 | 671 | |
a77754a7 | 672 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
837596a6 CL |
673 | } |
674 | ||
7a39d8b8 | 675 | static void ar_context_release(struct ar_context *ctx) |
837596a6 | 676 | { |
7a39d8b8 | 677 | unsigned int i; |
837596a6 | 678 | |
51b04d59 | 679 | vunmap(ctx->buffer); |
32b46093 | 680 | |
7a39d8b8 CL |
681 | for (i = 0; i < AR_BUFFERS; i++) |
682 | if (ctx->pages[i]) { | |
683 | dma_unmap_page(ctx->ohci->card.device, | |
684 | ar_buffer_bus(ctx, i), | |
685 | PAGE_SIZE, DMA_FROM_DEVICE); | |
686 | __free_page(ctx->pages[i]); | |
687 | } | |
ed568912 KH |
688 | } |
689 | ||
7a39d8b8 | 690 | static void ar_context_abort(struct ar_context *ctx, const char *error_msg) |
a55709ba | 691 | { |
64d21720 | 692 | struct fw_ohci *ohci = ctx->ohci; |
a55709ba | 693 | |
64d21720 SR |
694 | if (reg_read(ohci, CONTROL_CLEAR(ctx->regs)) & CONTEXT_RUN) { |
695 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); | |
696 | flush_writes(ohci); | |
a55709ba | 697 | |
de97cb64 | 698 | ohci_err(ohci, "AR error: %s; DMA stopped\n", error_msg); |
a55709ba | 699 | } |
7a39d8b8 CL |
700 | /* FIXME: restart? */ |
701 | } | |
702 | ||
703 | static inline unsigned int ar_next_buffer_index(unsigned int index) | |
704 | { | |
705 | return (index + 1) % AR_BUFFERS; | |
706 | } | |
707 | ||
7a39d8b8 CL |
708 | static inline unsigned int ar_first_buffer_index(struct ar_context *ctx) |
709 | { | |
710 | return ar_next_buffer_index(ctx->last_buffer_index); | |
711 | } | |
712 | ||
713 | /* | |
714 | * We search for the buffer that contains the last AR packet DMA data written | |
715 | * by the controller. | |
716 | */ | |
717 | static unsigned int ar_search_last_active_buffer(struct ar_context *ctx, | |
718 | unsigned int *buffer_offset) | |
719 | { | |
720 | unsigned int i, next_i, last = ctx->last_buffer_index; | |
721 | __le16 res_count, next_res_count; | |
722 | ||
723 | i = ar_first_buffer_index(ctx); | |
6aa7de05 | 724 | res_count = READ_ONCE(ctx->descriptors[i].res_count); |
7a39d8b8 CL |
725 | |
726 | /* A buffer that is not yet completely filled must be the last one. */ | |
727 | while (i != last && res_count == 0) { | |
728 | ||
729 | /* Peek at the next descriptor. */ | |
730 | next_i = ar_next_buffer_index(i); | |
731 | rmb(); /* read descriptors in order */ | |
6aa7de05 | 732 | next_res_count = READ_ONCE(ctx->descriptors[next_i].res_count); |
7a39d8b8 CL |
733 | /* |
734 | * If the next descriptor is still empty, we must stop at this | |
735 | * descriptor. | |
736 | */ | |
737 | if (next_res_count == cpu_to_le16(PAGE_SIZE)) { | |
738 | /* | |
739 | * The exception is when the DMA data for one packet is | |
740 | * split over three buffers; in this case, the middle | |
741 | * buffer's descriptor might be never updated by the | |
742 | * controller and look still empty, and we have to peek | |
743 | * at the third one. | |
744 | */ | |
745 | if (MAX_AR_PACKET_SIZE > PAGE_SIZE && i != last) { | |
746 | next_i = ar_next_buffer_index(next_i); | |
747 | rmb(); | |
6aa7de05 | 748 | next_res_count = READ_ONCE(ctx->descriptors[next_i].res_count); |
7a39d8b8 CL |
749 | if (next_res_count != cpu_to_le16(PAGE_SIZE)) |
750 | goto next_buffer_is_active; | |
751 | } | |
752 | ||
753 | break; | |
754 | } | |
755 | ||
756 | next_buffer_is_active: | |
757 | i = next_i; | |
758 | res_count = next_res_count; | |
759 | } | |
760 | ||
761 | rmb(); /* read res_count before the DMA data */ | |
762 | ||
763 | *buffer_offset = PAGE_SIZE - le16_to_cpu(res_count); | |
764 | if (*buffer_offset > PAGE_SIZE) { | |
765 | *buffer_offset = 0; | |
766 | ar_context_abort(ctx, "corrupted descriptor"); | |
767 | } | |
768 | ||
769 | return i; | |
770 | } | |
771 | ||
772 | static void ar_sync_buffers_for_cpu(struct ar_context *ctx, | |
773 | unsigned int end_buffer_index, | |
774 | unsigned int end_buffer_offset) | |
775 | { | |
776 | unsigned int i; | |
777 | ||
778 | i = ar_first_buffer_index(ctx); | |
779 | while (i != end_buffer_index) { | |
780 | dma_sync_single_for_cpu(ctx->ohci->card.device, | |
781 | ar_buffer_bus(ctx, i), | |
782 | PAGE_SIZE, DMA_FROM_DEVICE); | |
783 | i = ar_next_buffer_index(i); | |
784 | } | |
785 | if (end_buffer_offset > 0) | |
786 | dma_sync_single_for_cpu(ctx->ohci->card.device, | |
787 | ar_buffer_bus(ctx, i), | |
788 | end_buffer_offset, DMA_FROM_DEVICE); | |
a55709ba JF |
789 | } |
790 | ||
11bf20ad SR |
791 | #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) |
792 | #define cond_le32_to_cpu(v) \ | |
4a635593 | 793 | (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v)) |
11bf20ad SR |
794 | #else |
795 | #define cond_le32_to_cpu(v) le32_to_cpu(v) | |
796 | #endif | |
797 | ||
32b46093 | 798 | static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer) |
ed568912 | 799 | { |
ed568912 | 800 | struct fw_ohci *ohci = ctx->ohci; |
2639a6fb KH |
801 | struct fw_packet p; |
802 | u32 status, length, tcode; | |
43286568 | 803 | int evt; |
2639a6fb | 804 | |
11bf20ad SR |
805 | p.header[0] = cond_le32_to_cpu(buffer[0]); |
806 | p.header[1] = cond_le32_to_cpu(buffer[1]); | |
807 | p.header[2] = cond_le32_to_cpu(buffer[2]); | |
2639a6fb KH |
808 | |
809 | tcode = (p.header[0] >> 4) & 0x0f; | |
810 | switch (tcode) { | |
811 | case TCODE_WRITE_QUADLET_REQUEST: | |
812 | case TCODE_READ_QUADLET_RESPONSE: | |
32b46093 | 813 | p.header[3] = (__force __u32) buffer[3]; |
2639a6fb | 814 | p.header_length = 16; |
32b46093 | 815 | p.payload_length = 0; |
2639a6fb KH |
816 | break; |
817 | ||
2639a6fb | 818 | case TCODE_READ_BLOCK_REQUEST : |
11bf20ad | 819 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
32b46093 KH |
820 | p.header_length = 16; |
821 | p.payload_length = 0; | |
822 | break; | |
823 | ||
824 | case TCODE_WRITE_BLOCK_REQUEST: | |
2639a6fb KH |
825 | case TCODE_READ_BLOCK_RESPONSE: |
826 | case TCODE_LOCK_REQUEST: | |
827 | case TCODE_LOCK_RESPONSE: | |
11bf20ad | 828 | p.header[3] = cond_le32_to_cpu(buffer[3]); |
2639a6fb | 829 | p.header_length = 16; |
32b46093 | 830 | p.payload_length = p.header[3] >> 16; |
7a39d8b8 CL |
831 | if (p.payload_length > MAX_ASYNC_PAYLOAD) { |
832 | ar_context_abort(ctx, "invalid packet length"); | |
833 | return NULL; | |
834 | } | |
2639a6fb KH |
835 | break; |
836 | ||
837 | case TCODE_WRITE_RESPONSE: | |
838 | case TCODE_READ_QUADLET_REQUEST: | |
32b46093 | 839 | case OHCI_TCODE_PHY_PACKET: |
2639a6fb | 840 | p.header_length = 12; |
32b46093 | 841 | p.payload_length = 0; |
2639a6fb | 842 | break; |
ccff9629 SR |
843 | |
844 | default: | |
7a39d8b8 CL |
845 | ar_context_abort(ctx, "invalid tcode"); |
846 | return NULL; | |
2639a6fb | 847 | } |
ed568912 | 848 | |
32b46093 KH |
849 | p.payload = (void *) buffer + p.header_length; |
850 | ||
851 | /* FIXME: What to do about evt_* errors? */ | |
852 | length = (p.header_length + p.payload_length + 3) / 4; | |
11bf20ad | 853 | status = cond_le32_to_cpu(buffer[length]); |
43286568 | 854 | evt = (status >> 16) & 0x1f; |
32b46093 | 855 | |
43286568 | 856 | p.ack = evt - 16; |
32b46093 KH |
857 | p.speed = (status >> 21) & 0x7; |
858 | p.timestamp = status & 0xffff; | |
859 | p.generation = ohci->request_generation; | |
ed568912 | 860 | |
64d21720 | 861 | log_ar_at_event(ohci, 'R', p.speed, p.header, evt); |
ad3c0fe8 | 862 | |
c781c06d | 863 | /* |
a4dc090b SR |
864 | * Several controllers, notably from NEC and VIA, forget to |
865 | * write ack_complete status at PHY packet reception. | |
866 | */ | |
867 | if (evt == OHCI1394_evt_no_status && | |
868 | (p.header[0] & 0xff) == (OHCI1394_phy_tcode << 4)) | |
869 | p.ack = ACK_COMPLETE; | |
870 | ||
871 | /* | |
872 | * The OHCI bus reset handler synthesizes a PHY packet with | |
ed568912 KH |
873 | * the new generation number when a bus reset happens (see |
874 | * section 8.4.2.3). This helps us determine when a request | |
875 | * was received and make sure we send the response in the same | |
876 | * generation. We only need this for requests; for responses | |
877 | * we use the unique tlabel for finding the matching | |
c781c06d | 878 | * request. |
d34316a4 SR |
879 | * |
880 | * Alas some chips sometimes emit bus reset packets with a | |
881 | * wrong generation. We set the correct generation for these | |
2d7a36e2 | 882 | * at a slightly incorrect time (in bus_reset_work). |
c781c06d | 883 | */ |
d34316a4 | 884 | if (evt == OHCI1394_evt_bus_reset) { |
4a635593 | 885 | if (!(ohci->quirks & QUIRK_RESET_PACKET)) |
d34316a4 SR |
886 | ohci->request_generation = (p.header[2] >> 16) & 0xff; |
887 | } else if (ctx == &ohci->ar_request_ctx) { | |
2639a6fb | 888 | fw_core_handle_request(&ohci->card, &p); |
d34316a4 | 889 | } else { |
2639a6fb | 890 | fw_core_handle_response(&ohci->card, &p); |
d34316a4 | 891 | } |
ed568912 | 892 | |
32b46093 KH |
893 | return buffer + length + 1; |
894 | } | |
ed568912 | 895 | |
7a39d8b8 CL |
896 | static void *handle_ar_packets(struct ar_context *ctx, void *p, void *end) |
897 | { | |
898 | void *next; | |
899 | ||
900 | while (p < end) { | |
901 | next = handle_ar_packet(ctx, p); | |
902 | if (!next) | |
903 | return p; | |
904 | p = next; | |
905 | } | |
906 | ||
907 | return p; | |
908 | } | |
909 | ||
910 | static void ar_recycle_buffers(struct ar_context *ctx, unsigned int end_buffer) | |
911 | { | |
912 | unsigned int i; | |
913 | ||
914 | i = ar_first_buffer_index(ctx); | |
915 | while (i != end_buffer) { | |
916 | dma_sync_single_for_device(ctx->ohci->card.device, | |
917 | ar_buffer_bus(ctx, i), | |
918 | PAGE_SIZE, DMA_FROM_DEVICE); | |
919 | ar_context_link_page(ctx, i); | |
920 | i = ar_next_buffer_index(i); | |
921 | } | |
922 | } | |
923 | ||
32b46093 KH |
924 | static void ar_context_tasklet(unsigned long data) |
925 | { | |
926 | struct ar_context *ctx = (struct ar_context *)data; | |
7a39d8b8 CL |
927 | unsigned int end_buffer_index, end_buffer_offset; |
928 | void *p, *end; | |
32b46093 | 929 | |
7a39d8b8 CL |
930 | p = ctx->pointer; |
931 | if (!p) | |
932 | return; | |
32b46093 | 933 | |
7a39d8b8 CL |
934 | end_buffer_index = ar_search_last_active_buffer(ctx, |
935 | &end_buffer_offset); | |
936 | ar_sync_buffers_for_cpu(ctx, end_buffer_index, end_buffer_offset); | |
937 | end = ctx->buffer + end_buffer_index * PAGE_SIZE + end_buffer_offset; | |
32b46093 | 938 | |
7a39d8b8 | 939 | if (end_buffer_index < ar_first_buffer_index(ctx)) { |
c781c06d | 940 | /* |
7a39d8b8 CL |
941 | * The filled part of the overall buffer wraps around; handle |
942 | * all packets up to the buffer end here. If the last packet | |
943 | * wraps around, its tail will be visible after the buffer end | |
944 | * because the buffer start pages are mapped there again. | |
c781c06d | 945 | */ |
7a39d8b8 CL |
946 | void *buffer_end = ctx->buffer + AR_BUFFERS * PAGE_SIZE; |
947 | p = handle_ar_packets(ctx, p, buffer_end); | |
948 | if (p < buffer_end) | |
949 | goto error; | |
950 | /* adjust p to point back into the actual buffer */ | |
951 | p -= AR_BUFFERS * PAGE_SIZE; | |
952 | } | |
32b46093 | 953 | |
7a39d8b8 CL |
954 | p = handle_ar_packets(ctx, p, end); |
955 | if (p != end) { | |
956 | if (p > end) | |
957 | ar_context_abort(ctx, "inconsistent descriptor"); | |
958 | goto error; | |
959 | } | |
32b46093 | 960 | |
7a39d8b8 CL |
961 | ctx->pointer = p; |
962 | ar_recycle_buffers(ctx, end_buffer_index); | |
32b46093 | 963 | |
7a39d8b8 | 964 | return; |
a1f805e5 | 965 | |
7a39d8b8 CL |
966 | error: |
967 | ctx->pointer = NULL; | |
ed568912 KH |
968 | } |
969 | ||
ec766a79 CL |
970 | static int ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, |
971 | unsigned int descriptors_offset, u32 regs) | |
ed568912 | 972 | { |
7a39d8b8 CL |
973 | unsigned int i; |
974 | dma_addr_t dma_addr; | |
975 | struct page *pages[AR_BUFFERS + AR_WRAPAROUND_PAGES]; | |
976 | struct descriptor *d; | |
ed568912 | 977 | |
72e318e0 KH |
978 | ctx->regs = regs; |
979 | ctx->ohci = ohci; | |
ed568912 KH |
980 | tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); |
981 | ||
7a39d8b8 CL |
982 | for (i = 0; i < AR_BUFFERS; i++) { |
983 | ctx->pages[i] = alloc_page(GFP_KERNEL | GFP_DMA32); | |
984 | if (!ctx->pages[i]) | |
985 | goto out_of_memory; | |
986 | dma_addr = dma_map_page(ohci->card.device, ctx->pages[i], | |
987 | 0, PAGE_SIZE, DMA_FROM_DEVICE); | |
988 | if (dma_mapping_error(ohci->card.device, dma_addr)) { | |
989 | __free_page(ctx->pages[i]); | |
990 | ctx->pages[i] = NULL; | |
991 | goto out_of_memory; | |
992 | } | |
993 | set_page_private(ctx->pages[i], dma_addr); | |
994 | } | |
995 | ||
996 | for (i = 0; i < AR_BUFFERS; i++) | |
997 | pages[i] = ctx->pages[i]; | |
998 | for (i = 0; i < AR_WRAPAROUND_PAGES; i++) | |
999 | pages[AR_BUFFERS + i] = ctx->pages[i]; | |
51b04d59 | 1000 | ctx->buffer = vmap(pages, ARRAY_SIZE(pages), VM_MAP, PAGE_KERNEL); |
7a39d8b8 CL |
1001 | if (!ctx->buffer) |
1002 | goto out_of_memory; | |
1003 | ||
ec766a79 CL |
1004 | ctx->descriptors = ohci->misc_buffer + descriptors_offset; |
1005 | ctx->descriptors_bus = ohci->misc_buffer_bus + descriptors_offset; | |
7a39d8b8 CL |
1006 | |
1007 | for (i = 0; i < AR_BUFFERS; i++) { | |
1008 | d = &ctx->descriptors[i]; | |
1009 | d->req_count = cpu_to_le16(PAGE_SIZE); | |
1010 | d->control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | | |
1011 | DESCRIPTOR_STATUS | | |
1012 | DESCRIPTOR_BRANCH_ALWAYS); | |
1013 | d->data_address = cpu_to_le32(ar_buffer_bus(ctx, i)); | |
1014 | d->branch_address = cpu_to_le32(ctx->descriptors_bus + | |
1015 | ar_next_buffer_index(i) * sizeof(struct descriptor)); | |
1016 | } | |
32b46093 | 1017 | |
2aef469a | 1018 | return 0; |
7a39d8b8 CL |
1019 | |
1020 | out_of_memory: | |
1021 | ar_context_release(ctx); | |
1022 | ||
1023 | return -ENOMEM; | |
2aef469a KH |
1024 | } |
1025 | ||
1026 | static void ar_context_run(struct ar_context *ctx) | |
1027 | { | |
7a39d8b8 CL |
1028 | unsigned int i; |
1029 | ||
1030 | for (i = 0; i < AR_BUFFERS; i++) | |
1031 | ar_context_link_page(ctx, i); | |
2aef469a | 1032 | |
7a39d8b8 | 1033 | ctx->pointer = ctx->buffer; |
2aef469a | 1034 | |
7a39d8b8 | 1035 | reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ctx->descriptors_bus | 1); |
a77754a7 | 1036 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN); |
ed568912 | 1037 | } |
373b2edd | 1038 | |
53dca511 | 1039 | static struct descriptor *find_branch_descriptor(struct descriptor *d, int z) |
a186b4a6 | 1040 | { |
0ff8fbc6 | 1041 | __le16 branch; |
a186b4a6 | 1042 | |
0ff8fbc6 | 1043 | branch = d->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS); |
a186b4a6 JW |
1044 | |
1045 | /* figure out which descriptor the branch address goes in */ | |
0ff8fbc6 | 1046 | if (z == 2 && branch == cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS)) |
a186b4a6 JW |
1047 | return d; |
1048 | else | |
1049 | return d + z - 1; | |
1050 | } | |
1051 | ||
30200739 KH |
1052 | static void context_tasklet(unsigned long data) |
1053 | { | |
1054 | struct context *ctx = (struct context *) data; | |
30200739 KH |
1055 | struct descriptor *d, *last; |
1056 | u32 address; | |
1057 | int z; | |
fe5ca634 | 1058 | struct descriptor_buffer *desc; |
30200739 | 1059 | |
fe5ca634 DM |
1060 | desc = list_entry(ctx->buffer_list.next, |
1061 | struct descriptor_buffer, list); | |
1062 | last = ctx->last; | |
30200739 | 1063 | while (last->branch_address != 0) { |
fe5ca634 | 1064 | struct descriptor_buffer *old_desc = desc; |
30200739 KH |
1065 | address = le32_to_cpu(last->branch_address); |
1066 | z = address & 0xf; | |
fe5ca634 | 1067 | address &= ~0xf; |
a572e688 | 1068 | ctx->current_bus = address; |
fe5ca634 DM |
1069 | |
1070 | /* If the branch address points to a buffer outside of the | |
1071 | * current buffer, advance to the next buffer. */ | |
1072 | if (address < desc->buffer_bus || | |
1073 | address >= desc->buffer_bus + desc->used) | |
1074 | desc = list_entry(desc->list.next, | |
1075 | struct descriptor_buffer, list); | |
1076 | d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d); | |
a186b4a6 | 1077 | last = find_branch_descriptor(d, z); |
30200739 KH |
1078 | |
1079 | if (!ctx->callback(ctx, d, last)) | |
1080 | break; | |
1081 | ||
fe5ca634 DM |
1082 | if (old_desc != desc) { |
1083 | /* If we've advanced to the next buffer, move the | |
1084 | * previous buffer to the free list. */ | |
1085 | unsigned long flags; | |
1086 | old_desc->used = 0; | |
1087 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
1088 | list_move_tail(&old_desc->list, &ctx->buffer_list); | |
1089 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); | |
1090 | } | |
1091 | ctx->last = last; | |
30200739 KH |
1092 | } |
1093 | } | |
1094 | ||
fe5ca634 DM |
1095 | /* |
1096 | * Allocate a new buffer and add it to the list of free buffers for this | |
1097 | * context. Must be called with ohci->lock held. | |
1098 | */ | |
53dca511 | 1099 | static int context_add_buffer(struct context *ctx) |
fe5ca634 DM |
1100 | { |
1101 | struct descriptor_buffer *desc; | |
f5101d58 | 1102 | dma_addr_t uninitialized_var(bus_addr); |
fe5ca634 DM |
1103 | int offset; |
1104 | ||
1105 | /* | |
1106 | * 16MB of descriptors should be far more than enough for any DMA | |
1107 | * program. This will catch run-away userspace or DoS attacks. | |
1108 | */ | |
1109 | if (ctx->total_allocation >= 16*1024*1024) | |
1110 | return -ENOMEM; | |
1111 | ||
1112 | desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE, | |
1113 | &bus_addr, GFP_ATOMIC); | |
1114 | if (!desc) | |
1115 | return -ENOMEM; | |
1116 | ||
1117 | offset = (void *)&desc->buffer - (void *)desc; | |
18877518 HM |
1118 | /* |
1119 | * Some controllers, like JMicron ones, always issue 0x20-byte DMA reads | |
1120 | * for descriptors, even 0x10-byte ones. This can cause page faults when | |
1121 | * an IOMMU is in use and the oversized read crosses a page boundary. | |
1122 | * Work around this by always leaving at least 0x10 bytes of padding. | |
1123 | */ | |
1124 | desc->buffer_size = PAGE_SIZE - offset - 0x10; | |
fe5ca634 DM |
1125 | desc->buffer_bus = bus_addr + offset; |
1126 | desc->used = 0; | |
1127 | ||
1128 | list_add_tail(&desc->list, &ctx->buffer_list); | |
1129 | ctx->total_allocation += PAGE_SIZE; | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
53dca511 SR |
1134 | static int context_init(struct context *ctx, struct fw_ohci *ohci, |
1135 | u32 regs, descriptor_callback_t callback) | |
30200739 KH |
1136 | { |
1137 | ctx->ohci = ohci; | |
1138 | ctx->regs = regs; | |
fe5ca634 DM |
1139 | ctx->total_allocation = 0; |
1140 | ||
1141 | INIT_LIST_HEAD(&ctx->buffer_list); | |
1142 | if (context_add_buffer(ctx) < 0) | |
30200739 KH |
1143 | return -ENOMEM; |
1144 | ||
fe5ca634 DM |
1145 | ctx->buffer_tail = list_entry(ctx->buffer_list.next, |
1146 | struct descriptor_buffer, list); | |
1147 | ||
30200739 KH |
1148 | tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx); |
1149 | ctx->callback = callback; | |
1150 | ||
c781c06d KH |
1151 | /* |
1152 | * We put a dummy descriptor in the buffer that has a NULL | |
30200739 | 1153 | * branch address and looks like it's been sent. That way we |
fe5ca634 | 1154 | * have a descriptor to append DMA programs to. |
c781c06d | 1155 | */ |
fe5ca634 DM |
1156 | memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer)); |
1157 | ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST); | |
1158 | ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011); | |
1159 | ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer); | |
1160 | ctx->last = ctx->buffer_tail->buffer; | |
1161 | ctx->prev = ctx->buffer_tail->buffer; | |
be8dcab9 | 1162 | ctx->prev_z = 1; |
30200739 KH |
1163 | |
1164 | return 0; | |
1165 | } | |
1166 | ||
53dca511 | 1167 | static void context_release(struct context *ctx) |
30200739 KH |
1168 | { |
1169 | struct fw_card *card = &ctx->ohci->card; | |
fe5ca634 | 1170 | struct descriptor_buffer *desc, *tmp; |
30200739 | 1171 | |
fe5ca634 DM |
1172 | list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list) |
1173 | dma_free_coherent(card->device, PAGE_SIZE, desc, | |
1174 | desc->buffer_bus - | |
1175 | ((void *)&desc->buffer - (void *)desc)); | |
30200739 KH |
1176 | } |
1177 | ||
fe5ca634 | 1178 | /* Must be called with ohci->lock held */ |
53dca511 SR |
1179 | static struct descriptor *context_get_descriptors(struct context *ctx, |
1180 | int z, dma_addr_t *d_bus) | |
30200739 | 1181 | { |
fe5ca634 DM |
1182 | struct descriptor *d = NULL; |
1183 | struct descriptor_buffer *desc = ctx->buffer_tail; | |
1184 | ||
1185 | if (z * sizeof(*d) > desc->buffer_size) | |
1186 | return NULL; | |
1187 | ||
1188 | if (z * sizeof(*d) > desc->buffer_size - desc->used) { | |
1189 | /* No room for the descriptor in this buffer, so advance to the | |
1190 | * next one. */ | |
30200739 | 1191 | |
fe5ca634 DM |
1192 | if (desc->list.next == &ctx->buffer_list) { |
1193 | /* If there is no free buffer next in the list, | |
1194 | * allocate one. */ | |
1195 | if (context_add_buffer(ctx) < 0) | |
1196 | return NULL; | |
1197 | } | |
1198 | desc = list_entry(desc->list.next, | |
1199 | struct descriptor_buffer, list); | |
1200 | ctx->buffer_tail = desc; | |
1201 | } | |
30200739 | 1202 | |
fe5ca634 | 1203 | d = desc->buffer + desc->used / sizeof(*d); |
2d826cc5 | 1204 | memset(d, 0, z * sizeof(*d)); |
fe5ca634 | 1205 | *d_bus = desc->buffer_bus + desc->used; |
30200739 KH |
1206 | |
1207 | return d; | |
1208 | } | |
1209 | ||
295e3feb | 1210 | static void context_run(struct context *ctx, u32 extra) |
30200739 KH |
1211 | { |
1212 | struct fw_ohci *ohci = ctx->ohci; | |
1213 | ||
a77754a7 | 1214 | reg_write(ohci, COMMAND_PTR(ctx->regs), |
fe5ca634 | 1215 | le32_to_cpu(ctx->last->branch_address)); |
a77754a7 KH |
1216 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0); |
1217 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra); | |
386a4153 | 1218 | ctx->running = true; |
30200739 KH |
1219 | flush_writes(ohci); |
1220 | } | |
1221 | ||
1222 | static void context_append(struct context *ctx, | |
1223 | struct descriptor *d, int z, int extra) | |
1224 | { | |
1225 | dma_addr_t d_bus; | |
fe5ca634 | 1226 | struct descriptor_buffer *desc = ctx->buffer_tail; |
be8dcab9 | 1227 | struct descriptor *d_branch; |
30200739 | 1228 | |
fe5ca634 | 1229 | d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d); |
30200739 | 1230 | |
fe5ca634 | 1231 | desc->used += (z + extra) * sizeof(*d); |
071595eb SR |
1232 | |
1233 | wmb(); /* finish init of new descriptors before branch_address update */ | |
be8dcab9 AL |
1234 | |
1235 | d_branch = find_branch_descriptor(ctx->prev, ctx->prev_z); | |
1236 | d_branch->branch_address = cpu_to_le32(d_bus | z); | |
1237 | ||
1238 | /* | |
1239 | * VT6306 incorrectly checks only the single descriptor at the | |
1240 | * CommandPtr when the wake bit is written, so if it's a | |
1241 | * multi-descriptor block starting with an INPUT_MORE, put a copy of | |
1242 | * the branch address in the first descriptor. | |
1243 | * | |
1244 | * Not doing this for transmit contexts since not sure how it interacts | |
1245 | * with skip addresses. | |
1246 | */ | |
1247 | if (unlikely(ctx->ohci->quirks & QUIRK_IR_WAKE) && | |
1248 | d_branch != ctx->prev && | |
1249 | (ctx->prev->control & cpu_to_le16(DESCRIPTOR_CMD)) == | |
1250 | cpu_to_le16(DESCRIPTOR_INPUT_MORE)) { | |
1251 | ctx->prev->branch_address = cpu_to_le32(d_bus | z); | |
1252 | } | |
1253 | ||
1254 | ctx->prev = d; | |
1255 | ctx->prev_z = z; | |
30200739 KH |
1256 | } |
1257 | ||
1258 | static void context_stop(struct context *ctx) | |
1259 | { | |
64d21720 | 1260 | struct fw_ohci *ohci = ctx->ohci; |
30200739 | 1261 | u32 reg; |
b8295668 | 1262 | int i; |
30200739 | 1263 | |
64d21720 | 1264 | reg_write(ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN); |
386a4153 | 1265 | ctx->running = false; |
30200739 | 1266 | |
9ef28ccd | 1267 | for (i = 0; i < 1000; i++) { |
64d21720 | 1268 | reg = reg_read(ohci, CONTROL_SET(ctx->regs)); |
b8295668 | 1269 | if ((reg & CONTEXT_ACTIVE) == 0) |
b0068549 | 1270 | return; |
b8295668 | 1271 | |
9ef28ccd SR |
1272 | if (i) |
1273 | udelay(10); | |
b8295668 | 1274 | } |
de97cb64 | 1275 | ohci_err(ohci, "DMA context still active (0x%08x)\n", reg); |
30200739 | 1276 | } |
ed568912 | 1277 | |
f319b6a0 | 1278 | struct driver_data { |
da28947e | 1279 | u8 inline_data[8]; |
f319b6a0 KH |
1280 | struct fw_packet *packet; |
1281 | }; | |
ed568912 | 1282 | |
c781c06d KH |
1283 | /* |
1284 | * This function apppends a packet to the DMA queue for transmission. | |
f319b6a0 | 1285 | * Must always be called with the ochi->lock held to ensure proper |
c781c06d KH |
1286 | * generation handling and locking around packet queue manipulation. |
1287 | */ | |
53dca511 SR |
1288 | static int at_context_queue_packet(struct context *ctx, |
1289 | struct fw_packet *packet) | |
ed568912 | 1290 | { |
ed568912 | 1291 | struct fw_ohci *ohci = ctx->ohci; |
4b6d51ec | 1292 | dma_addr_t d_bus, uninitialized_var(payload_bus); |
f319b6a0 KH |
1293 | struct driver_data *driver_data; |
1294 | struct descriptor *d, *last; | |
1295 | __le32 *header; | |
ed568912 KH |
1296 | int z, tcode; |
1297 | ||
f319b6a0 KH |
1298 | d = context_get_descriptors(ctx, 4, &d_bus); |
1299 | if (d == NULL) { | |
1300 | packet->ack = RCODE_SEND_ERROR; | |
1301 | return -1; | |
ed568912 KH |
1302 | } |
1303 | ||
a77754a7 | 1304 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
f319b6a0 KH |
1305 | d[0].res_count = cpu_to_le16(packet->timestamp); |
1306 | ||
c781c06d | 1307 | /* |
b3834be5 | 1308 | * The DMA format for asynchronous link packets is different |
ed568912 | 1309 | * from the IEEE1394 layout, so shift the fields around |
5b06db16 | 1310 | * accordingly. |
c781c06d | 1311 | */ |
f319b6a0 | 1312 | |
5b06db16 | 1313 | tcode = (packet->header[0] >> 4) & 0x0f; |
f319b6a0 | 1314 | header = (__le32 *) &d[1]; |
5b06db16 CL |
1315 | switch (tcode) { |
1316 | case TCODE_WRITE_QUADLET_REQUEST: | |
1317 | case TCODE_WRITE_BLOCK_REQUEST: | |
1318 | case TCODE_WRITE_RESPONSE: | |
1319 | case TCODE_READ_QUADLET_REQUEST: | |
1320 | case TCODE_READ_BLOCK_REQUEST: | |
1321 | case TCODE_READ_QUADLET_RESPONSE: | |
1322 | case TCODE_READ_BLOCK_RESPONSE: | |
1323 | case TCODE_LOCK_REQUEST: | |
1324 | case TCODE_LOCK_RESPONSE: | |
f319b6a0 KH |
1325 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
1326 | (packet->speed << 16)); | |
1327 | header[1] = cpu_to_le32((packet->header[1] & 0xffff) | | |
1328 | (packet->header[0] & 0xffff0000)); | |
1329 | header[2] = cpu_to_le32(packet->header[2]); | |
ed568912 | 1330 | |
ed568912 | 1331 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
f319b6a0 | 1332 | header[3] = cpu_to_le32(packet->header[3]); |
ed568912 | 1333 | else |
f319b6a0 KH |
1334 | header[3] = (__force __le32) packet->header[3]; |
1335 | ||
1336 | d[0].req_count = cpu_to_le16(packet->header_length); | |
f8c2287c JF |
1337 | break; |
1338 | ||
5b06db16 | 1339 | case TCODE_LINK_INTERNAL: |
f319b6a0 KH |
1340 | header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) | |
1341 | (packet->speed << 16)); | |
5b06db16 CL |
1342 | header[1] = cpu_to_le32(packet->header[1]); |
1343 | header[2] = cpu_to_le32(packet->header[2]); | |
f319b6a0 | 1344 | d[0].req_count = cpu_to_le16(12); |
cc550216 | 1345 | |
5b06db16 | 1346 | if (is_ping_packet(&packet->header[1])) |
cc550216 | 1347 | d[0].control |= cpu_to_le16(DESCRIPTOR_PING); |
f8c2287c JF |
1348 | break; |
1349 | ||
5b06db16 | 1350 | case TCODE_STREAM_DATA: |
f8c2287c JF |
1351 | header[0] = cpu_to_le32((packet->header[0] & 0xffff) | |
1352 | (packet->speed << 16)); | |
1353 | header[1] = cpu_to_le32(packet->header[0] & 0xffff0000); | |
1354 | d[0].req_count = cpu_to_le16(8); | |
1355 | break; | |
1356 | ||
1357 | default: | |
1358 | /* BUG(); */ | |
1359 | packet->ack = RCODE_SEND_ERROR; | |
1360 | return -1; | |
ed568912 KH |
1361 | } |
1362 | ||
da28947e | 1363 | BUILD_BUG_ON(sizeof(struct driver_data) > sizeof(struct descriptor)); |
f319b6a0 KH |
1364 | driver_data = (struct driver_data *) &d[3]; |
1365 | driver_data->packet = packet; | |
20d11673 | 1366 | packet->driver_data = driver_data; |
a186b4a6 | 1367 | |
f319b6a0 | 1368 | if (packet->payload_length > 0) { |
da28947e CL |
1369 | if (packet->payload_length > sizeof(driver_data->inline_data)) { |
1370 | payload_bus = dma_map_single(ohci->card.device, | |
1371 | packet->payload, | |
1372 | packet->payload_length, | |
1373 | DMA_TO_DEVICE); | |
1374 | if (dma_mapping_error(ohci->card.device, payload_bus)) { | |
1375 | packet->ack = RCODE_SEND_ERROR; | |
1376 | return -1; | |
1377 | } | |
1378 | packet->payload_bus = payload_bus; | |
1379 | packet->payload_mapped = true; | |
1380 | } else { | |
1381 | memcpy(driver_data->inline_data, packet->payload, | |
1382 | packet->payload_length); | |
1383 | payload_bus = d_bus + 3 * sizeof(*d); | |
f319b6a0 KH |
1384 | } |
1385 | ||
1386 | d[2].req_count = cpu_to_le16(packet->payload_length); | |
1387 | d[2].data_address = cpu_to_le32(payload_bus); | |
1388 | last = &d[2]; | |
1389 | z = 3; | |
ed568912 | 1390 | } else { |
f319b6a0 KH |
1391 | last = &d[0]; |
1392 | z = 2; | |
ed568912 | 1393 | } |
ed568912 | 1394 | |
a77754a7 KH |
1395 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
1396 | DESCRIPTOR_IRQ_ALWAYS | | |
1397 | DESCRIPTOR_BRANCH_ALWAYS); | |
ed568912 | 1398 | |
b6258fc1 SR |
1399 | /* FIXME: Document how the locking works. */ |
1400 | if (ohci->generation != packet->generation) { | |
19593ffd | 1401 | if (packet->payload_mapped) |
ab88ca48 SR |
1402 | dma_unmap_single(ohci->card.device, payload_bus, |
1403 | packet->payload_length, DMA_TO_DEVICE); | |
f319b6a0 KH |
1404 | packet->ack = RCODE_GENERATION; |
1405 | return -1; | |
1406 | } | |
1407 | ||
1408 | context_append(ctx, d, z, 4 - z); | |
ed568912 | 1409 | |
dd6254e5 | 1410 | if (ctx->running) |
13882a82 | 1411 | reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); |
dd6254e5 | 1412 | else |
f319b6a0 KH |
1413 | context_run(ctx, 0); |
1414 | ||
1415 | return 0; | |
ed568912 KH |
1416 | } |
1417 | ||
82b662dc CL |
1418 | static void at_context_flush(struct context *ctx) |
1419 | { | |
1420 | tasklet_disable(&ctx->tasklet); | |
1421 | ||
1422 | ctx->flushing = true; | |
1423 | context_tasklet((unsigned long)ctx); | |
1424 | ctx->flushing = false; | |
1425 | ||
1426 | tasklet_enable(&ctx->tasklet); | |
1427 | } | |
1428 | ||
f319b6a0 KH |
1429 | static int handle_at_packet(struct context *context, |
1430 | struct descriptor *d, | |
1431 | struct descriptor *last) | |
ed568912 | 1432 | { |
f319b6a0 | 1433 | struct driver_data *driver_data; |
ed568912 | 1434 | struct fw_packet *packet; |
f319b6a0 | 1435 | struct fw_ohci *ohci = context->ohci; |
ed568912 KH |
1436 | int evt; |
1437 | ||
82b662dc | 1438 | if (last->transfer_status == 0 && !context->flushing) |
f319b6a0 KH |
1439 | /* This descriptor isn't done yet, stop iteration. */ |
1440 | return 0; | |
ed568912 | 1441 | |
f319b6a0 KH |
1442 | driver_data = (struct driver_data *) &d[3]; |
1443 | packet = driver_data->packet; | |
1444 | if (packet == NULL) | |
1445 | /* This packet was cancelled, just continue. */ | |
1446 | return 1; | |
730c32f5 | 1447 | |
19593ffd | 1448 | if (packet->payload_mapped) |
1d1dc5e8 | 1449 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
ed568912 | 1450 | packet->payload_length, DMA_TO_DEVICE); |
ed568912 | 1451 | |
f319b6a0 KH |
1452 | evt = le16_to_cpu(last->transfer_status) & 0x1f; |
1453 | packet->timestamp = le16_to_cpu(last->res_count); | |
ed568912 | 1454 | |
64d21720 | 1455 | log_ar_at_event(ohci, 'T', packet->speed, packet->header, evt); |
ad3c0fe8 | 1456 | |
f319b6a0 KH |
1457 | switch (evt) { |
1458 | case OHCI1394_evt_timeout: | |
1459 | /* Async response transmit timed out. */ | |
1460 | packet->ack = RCODE_CANCELLED; | |
1461 | break; | |
ed568912 | 1462 | |
f319b6a0 | 1463 | case OHCI1394_evt_flushed: |
c781c06d KH |
1464 | /* |
1465 | * The packet was flushed should give same error as | |
1466 | * when we try to use a stale generation count. | |
1467 | */ | |
f319b6a0 KH |
1468 | packet->ack = RCODE_GENERATION; |
1469 | break; | |
ed568912 | 1470 | |
f319b6a0 | 1471 | case OHCI1394_evt_missing_ack: |
82b662dc CL |
1472 | if (context->flushing) |
1473 | packet->ack = RCODE_GENERATION; | |
1474 | else { | |
1475 | /* | |
1476 | * Using a valid (current) generation count, but the | |
1477 | * node is not on the bus or not sending acks. | |
1478 | */ | |
1479 | packet->ack = RCODE_NO_ACK; | |
1480 | } | |
f319b6a0 | 1481 | break; |
ed568912 | 1482 | |
f319b6a0 KH |
1483 | case ACK_COMPLETE + 0x10: |
1484 | case ACK_PENDING + 0x10: | |
1485 | case ACK_BUSY_X + 0x10: | |
1486 | case ACK_BUSY_A + 0x10: | |
1487 | case ACK_BUSY_B + 0x10: | |
1488 | case ACK_DATA_ERROR + 0x10: | |
1489 | case ACK_TYPE_ERROR + 0x10: | |
1490 | packet->ack = evt - 0x10; | |
1491 | break; | |
ed568912 | 1492 | |
82b662dc CL |
1493 | case OHCI1394_evt_no_status: |
1494 | if (context->flushing) { | |
1495 | packet->ack = RCODE_GENERATION; | |
1496 | break; | |
1497 | } | |
1498 | /* fall through */ | |
1499 | ||
f319b6a0 KH |
1500 | default: |
1501 | packet->ack = RCODE_SEND_ERROR; | |
1502 | break; | |
1503 | } | |
ed568912 | 1504 | |
f319b6a0 | 1505 | packet->callback(packet, &ohci->card, packet->ack); |
ed568912 | 1506 | |
f319b6a0 | 1507 | return 1; |
ed568912 KH |
1508 | } |
1509 | ||
a77754a7 KH |
1510 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) |
1511 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
1512 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
1513 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
1514 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
93c4cceb | 1515 | |
53dca511 SR |
1516 | static void handle_local_rom(struct fw_ohci *ohci, |
1517 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1518 | { |
1519 | struct fw_packet response; | |
1520 | int tcode, length, i; | |
1521 | ||
a77754a7 | 1522 | tcode = HEADER_GET_TCODE(packet->header[0]); |
93c4cceb | 1523 | if (TCODE_IS_BLOCK_PACKET(tcode)) |
a77754a7 | 1524 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); |
93c4cceb KH |
1525 | else |
1526 | length = 4; | |
1527 | ||
1528 | i = csr - CSR_CONFIG_ROM; | |
1529 | if (i + length > CONFIG_ROM_SIZE) { | |
1530 | fw_fill_response(&response, packet->header, | |
1531 | RCODE_ADDRESS_ERROR, NULL, 0); | |
1532 | } else if (!TCODE_IS_READ_REQUEST(tcode)) { | |
1533 | fw_fill_response(&response, packet->header, | |
1534 | RCODE_TYPE_ERROR, NULL, 0); | |
1535 | } else { | |
1536 | fw_fill_response(&response, packet->header, RCODE_COMPLETE, | |
1537 | (void *) ohci->config_rom + i, length); | |
1538 | } | |
1539 | ||
1540 | fw_core_handle_response(&ohci->card, &response); | |
1541 | } | |
1542 | ||
53dca511 SR |
1543 | static void handle_local_lock(struct fw_ohci *ohci, |
1544 | struct fw_packet *packet, u32 csr) | |
93c4cceb KH |
1545 | { |
1546 | struct fw_packet response; | |
e1393667 | 1547 | int tcode, length, ext_tcode, sel, try; |
93c4cceb KH |
1548 | __be32 *payload, lock_old; |
1549 | u32 lock_arg, lock_data; | |
1550 | ||
a77754a7 KH |
1551 | tcode = HEADER_GET_TCODE(packet->header[0]); |
1552 | length = HEADER_GET_DATA_LENGTH(packet->header[3]); | |
93c4cceb | 1553 | payload = packet->payload; |
a77754a7 | 1554 | ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]); |
93c4cceb KH |
1555 | |
1556 | if (tcode == TCODE_LOCK_REQUEST && | |
1557 | ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) { | |
1558 | lock_arg = be32_to_cpu(payload[0]); | |
1559 | lock_data = be32_to_cpu(payload[1]); | |
1560 | } else if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1561 | lock_arg = 0; | |
1562 | lock_data = 0; | |
1563 | } else { | |
1564 | fw_fill_response(&response, packet->header, | |
1565 | RCODE_TYPE_ERROR, NULL, 0); | |
1566 | goto out; | |
1567 | } | |
1568 | ||
1569 | sel = (csr - CSR_BUS_MANAGER_ID) / 4; | |
1570 | reg_write(ohci, OHCI1394_CSRData, lock_data); | |
1571 | reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); | |
1572 | reg_write(ohci, OHCI1394_CSRControl, sel); | |
1573 | ||
e1393667 CL |
1574 | for (try = 0; try < 20; try++) |
1575 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) { | |
1576 | lock_old = cpu_to_be32(reg_read(ohci, | |
1577 | OHCI1394_CSRData)); | |
1578 | fw_fill_response(&response, packet->header, | |
1579 | RCODE_COMPLETE, | |
1580 | &lock_old, sizeof(lock_old)); | |
1581 | goto out; | |
1582 | } | |
1583 | ||
de97cb64 | 1584 | ohci_err(ohci, "swap not done (CSR lock timeout)\n"); |
e1393667 | 1585 | fw_fill_response(&response, packet->header, RCODE_BUSY, NULL, 0); |
93c4cceb | 1586 | |
93c4cceb KH |
1587 | out: |
1588 | fw_core_handle_response(&ohci->card, &response); | |
1589 | } | |
1590 | ||
53dca511 | 1591 | static void handle_local_request(struct context *ctx, struct fw_packet *packet) |
93c4cceb | 1592 | { |
2608203d | 1593 | u64 offset, csr; |
93c4cceb | 1594 | |
473d28c7 KH |
1595 | if (ctx == &ctx->ohci->at_request_ctx) { |
1596 | packet->ack = ACK_PENDING; | |
1597 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1598 | } | |
93c4cceb KH |
1599 | |
1600 | offset = | |
1601 | ((unsigned long long) | |
a77754a7 | 1602 | HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) | |
93c4cceb KH |
1603 | packet->header[2]; |
1604 | csr = offset - CSR_REGISTER_BASE; | |
1605 | ||
1606 | /* Handle config rom reads. */ | |
1607 | if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END) | |
1608 | handle_local_rom(ctx->ohci, packet, csr); | |
1609 | else switch (csr) { | |
1610 | case CSR_BUS_MANAGER_ID: | |
1611 | case CSR_BANDWIDTH_AVAILABLE: | |
1612 | case CSR_CHANNELS_AVAILABLE_HI: | |
1613 | case CSR_CHANNELS_AVAILABLE_LO: | |
1614 | handle_local_lock(ctx->ohci, packet, csr); | |
1615 | break; | |
1616 | default: | |
1617 | if (ctx == &ctx->ohci->at_request_ctx) | |
1618 | fw_core_handle_request(&ctx->ohci->card, packet); | |
1619 | else | |
1620 | fw_core_handle_response(&ctx->ohci->card, packet); | |
1621 | break; | |
1622 | } | |
473d28c7 KH |
1623 | |
1624 | if (ctx == &ctx->ohci->at_response_ctx) { | |
1625 | packet->ack = ACK_COMPLETE; | |
1626 | packet->callback(packet, &ctx->ohci->card, packet->ack); | |
1627 | } | |
93c4cceb | 1628 | } |
e636fe25 | 1629 | |
53dca511 | 1630 | static void at_context_transmit(struct context *ctx, struct fw_packet *packet) |
ed568912 | 1631 | { |
ed568912 | 1632 | unsigned long flags; |
2dbd7d7e | 1633 | int ret; |
ed568912 KH |
1634 | |
1635 | spin_lock_irqsave(&ctx->ohci->lock, flags); | |
1636 | ||
a77754a7 | 1637 | if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id && |
e636fe25 | 1638 | ctx->ohci->generation == packet->generation) { |
93c4cceb KH |
1639 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1640 | handle_local_request(ctx, packet); | |
1641 | return; | |
e636fe25 | 1642 | } |
ed568912 | 1643 | |
2dbd7d7e | 1644 | ret = at_context_queue_packet(ctx, packet); |
ed568912 KH |
1645 | spin_unlock_irqrestore(&ctx->ohci->lock, flags); |
1646 | ||
2dbd7d7e | 1647 | if (ret < 0) |
f319b6a0 | 1648 | packet->callback(packet, &ctx->ohci->card, packet->ack); |
a186b4a6 | 1649 | |
ed568912 KH |
1650 | } |
1651 | ||
f117a3e3 CL |
1652 | static void detect_dead_context(struct fw_ohci *ohci, |
1653 | const char *name, unsigned int regs) | |
1654 | { | |
1655 | u32 ctl; | |
1656 | ||
1657 | ctl = reg_read(ohci, CONTROL_SET(regs)); | |
cfda62ba | 1658 | if (ctl & CONTEXT_DEAD) |
de97cb64 | 1659 | ohci_err(ohci, "DMA context %s has stopped, error code: %s\n", |
64d21720 | 1660 | name, evts[ctl & 0x1f]); |
f117a3e3 CL |
1661 | } |
1662 | ||
1663 | static void handle_dead_contexts(struct fw_ohci *ohci) | |
1664 | { | |
1665 | unsigned int i; | |
1666 | char name[8]; | |
1667 | ||
1668 | detect_dead_context(ohci, "ATReq", OHCI1394_AsReqTrContextBase); | |
1669 | detect_dead_context(ohci, "ATRsp", OHCI1394_AsRspTrContextBase); | |
1670 | detect_dead_context(ohci, "ARReq", OHCI1394_AsReqRcvContextBase); | |
1671 | detect_dead_context(ohci, "ARRsp", OHCI1394_AsRspRcvContextBase); | |
1672 | for (i = 0; i < 32; ++i) { | |
1673 | if (!(ohci->it_context_support & (1 << i))) | |
1674 | continue; | |
1675 | sprintf(name, "IT%u", i); | |
1676 | detect_dead_context(ohci, name, OHCI1394_IsoXmitContextBase(i)); | |
1677 | } | |
1678 | for (i = 0; i < 32; ++i) { | |
1679 | if (!(ohci->ir_context_support & (1 << i))) | |
1680 | continue; | |
1681 | sprintf(name, "IR%u", i); | |
1682 | detect_dead_context(ohci, name, OHCI1394_IsoRcvContextBase(i)); | |
1683 | } | |
1684 | /* TODO: maybe try to flush and restart the dead contexts */ | |
1685 | } | |
1686 | ||
a48777e0 CL |
1687 | static u32 cycle_timer_ticks(u32 cycle_timer) |
1688 | { | |
1689 | u32 ticks; | |
1690 | ||
1691 | ticks = cycle_timer & 0xfff; | |
1692 | ticks += 3072 * ((cycle_timer >> 12) & 0x1fff); | |
1693 | ticks += (3072 * 8000) * (cycle_timer >> 25); | |
1694 | ||
1695 | return ticks; | |
1696 | } | |
1697 | ||
1698 | /* | |
1699 | * Some controllers exhibit one or more of the following bugs when updating the | |
1700 | * iso cycle timer register: | |
1701 | * - When the lowest six bits are wrapping around to zero, a read that happens | |
1702 | * at the same time will return garbage in the lowest ten bits. | |
1703 | * - When the cycleOffset field wraps around to zero, the cycleCount field is | |
1704 | * not incremented for about 60 ns. | |
1705 | * - Occasionally, the entire register reads zero. | |
1706 | * | |
1707 | * To catch these, we read the register three times and ensure that the | |
1708 | * difference between each two consecutive reads is approximately the same, i.e. | |
1709 | * less than twice the other. Furthermore, any negative difference indicates an | |
1710 | * error. (A PCI read should take at least 20 ticks of the 24.576 MHz timer to | |
1711 | * execute, so we have enough precision to compute the ratio of the differences.) | |
1712 | */ | |
1713 | static u32 get_cycle_time(struct fw_ohci *ohci) | |
1714 | { | |
1715 | u32 c0, c1, c2; | |
1716 | u32 t0, t1, t2; | |
1717 | s32 diff01, diff12; | |
1718 | int i; | |
1719 | ||
1720 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1721 | ||
1722 | if (ohci->quirks & QUIRK_CYCLE_TIMER) { | |
1723 | i = 0; | |
1724 | c1 = c2; | |
1725 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1726 | do { | |
1727 | c0 = c1; | |
1728 | c1 = c2; | |
1729 | c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
1730 | t0 = cycle_timer_ticks(c0); | |
1731 | t1 = cycle_timer_ticks(c1); | |
1732 | t2 = cycle_timer_ticks(c2); | |
1733 | diff01 = t1 - t0; | |
1734 | diff12 = t2 - t1; | |
1735 | } while ((diff01 <= 0 || diff12 <= 0 || | |
1736 | diff01 / diff12 >= 2 || diff12 / diff01 >= 2) | |
1737 | && i++ < 20); | |
1738 | } | |
1739 | ||
1740 | return c2; | |
1741 | } | |
1742 | ||
1743 | /* | |
1744 | * This function has to be called at least every 64 seconds. The bus_time | |
1745 | * field stores not only the upper 25 bits of the BUS_TIME register but also | |
1746 | * the most significant bit of the cycle timer in bit 6 so that we can detect | |
1747 | * changes in this bit. | |
1748 | */ | |
1749 | static u32 update_bus_time(struct fw_ohci *ohci) | |
1750 | { | |
1751 | u32 cycle_time_seconds = get_cycle_time(ohci) >> 25; | |
1752 | ||
9d60ef2b CL |
1753 | if (unlikely(!ohci->bus_time_running)) { |
1754 | reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_cycle64Seconds); | |
b98c7518 | 1755 | ohci->bus_time = (lower_32_bits(ktime_get_seconds()) & ~0x7f) | |
9d60ef2b CL |
1756 | (cycle_time_seconds & 0x40); |
1757 | ohci->bus_time_running = true; | |
1758 | } | |
1759 | ||
a48777e0 CL |
1760 | if ((ohci->bus_time & 0x40) != (cycle_time_seconds & 0x40)) |
1761 | ohci->bus_time += 0x40; | |
1762 | ||
1763 | return ohci->bus_time | cycle_time_seconds; | |
1764 | } | |
1765 | ||
25935ebe SG |
1766 | static int get_status_for_port(struct fw_ohci *ohci, int port_index) |
1767 | { | |
1768 | int reg; | |
1769 | ||
1770 | mutex_lock(&ohci->phy_reg_mutex); | |
1771 | reg = write_phy_reg(ohci, 7, port_index); | |
28897fb7 SR |
1772 | if (reg >= 0) |
1773 | reg = read_phy_reg(ohci, 8); | |
25935ebe SG |
1774 | mutex_unlock(&ohci->phy_reg_mutex); |
1775 | if (reg < 0) | |
1776 | return reg; | |
1777 | ||
1778 | switch (reg & 0x0f) { | |
1779 | case 0x06: | |
1780 | return 2; /* is child node (connected to parent node) */ | |
1781 | case 0x0e: | |
1782 | return 3; /* is parent node (connected to child node) */ | |
1783 | } | |
1784 | return 1; /* not connected */ | |
1785 | } | |
1786 | ||
1787 | static int get_self_id_pos(struct fw_ohci *ohci, u32 self_id, | |
1788 | int self_id_count) | |
1789 | { | |
1790 | int i; | |
1791 | u32 entry; | |
28897fb7 | 1792 | |
25935ebe SG |
1793 | for (i = 0; i < self_id_count; i++) { |
1794 | entry = ohci->self_id_buffer[i]; | |
1795 | if ((self_id & 0xff000000) == (entry & 0xff000000)) | |
1796 | return -1; | |
1797 | if ((self_id & 0xff000000) < (entry & 0xff000000)) | |
1798 | return i; | |
1799 | } | |
1800 | return i; | |
1801 | } | |
1802 | ||
52439d60 SG |
1803 | static int initiated_reset(struct fw_ohci *ohci) |
1804 | { | |
1805 | int reg; | |
1806 | int ret = 0; | |
1807 | ||
1808 | mutex_lock(&ohci->phy_reg_mutex); | |
1809 | reg = write_phy_reg(ohci, 7, 0xe0); /* Select page 7 */ | |
1810 | if (reg >= 0) { | |
1811 | reg = read_phy_reg(ohci, 8); | |
1812 | reg |= 0x40; | |
1813 | reg = write_phy_reg(ohci, 8, reg); /* set PMODE bit */ | |
1814 | if (reg >= 0) { | |
1815 | reg = read_phy_reg(ohci, 12); /* read register 12 */ | |
1816 | if (reg >= 0) { | |
1817 | if ((reg & 0x08) == 0x08) { | |
1818 | /* bit 3 indicates "initiated reset" */ | |
1819 | ret = 0x2; | |
1820 | } | |
1821 | } | |
1822 | } | |
1823 | } | |
1824 | mutex_unlock(&ohci->phy_reg_mutex); | |
1825 | return ret; | |
1826 | } | |
1827 | ||
25935ebe | 1828 | /* |
28897fb7 SR |
1829 | * TI TSB82AA2B and TSB12LV26 do not receive the selfID of a locally |
1830 | * attached TSB41BA3D phy; see http://www.ti.com/litv/pdf/sllz059. | |
1831 | * Construct the selfID from phy register contents. | |
25935ebe | 1832 | */ |
25935ebe SG |
1833 | static int find_and_insert_self_id(struct fw_ohci *ohci, int self_id_count) |
1834 | { | |
28897fb7 SR |
1835 | int reg, i, pos, status; |
1836 | /* link active 1, speed 3, bridge 0, contender 1, more packets 0 */ | |
1837 | u32 self_id = 0x8040c800; | |
25935ebe SG |
1838 | |
1839 | reg = reg_read(ohci, OHCI1394_NodeID); | |
1840 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
de97cb64 PH |
1841 | ohci_notice(ohci, |
1842 | "node ID not valid, new bus reset in progress\n"); | |
25935ebe SG |
1843 | return -EBUSY; |
1844 | } | |
1845 | self_id |= ((reg & 0x3f) << 24); /* phy ID */ | |
1846 | ||
28897fb7 | 1847 | reg = ohci_read_phy_reg(&ohci->card, 4); |
25935ebe SG |
1848 | if (reg < 0) |
1849 | return reg; | |
1850 | self_id |= ((reg & 0x07) << 8); /* power class */ | |
1851 | ||
28897fb7 | 1852 | reg = ohci_read_phy_reg(&ohci->card, 1); |
25935ebe SG |
1853 | if (reg < 0) |
1854 | return reg; | |
1855 | self_id |= ((reg & 0x3f) << 16); /* gap count */ | |
1856 | ||
1857 | for (i = 0; i < 3; i++) { | |
1858 | status = get_status_for_port(ohci, i); | |
1859 | if (status < 0) | |
1860 | return status; | |
1861 | self_id |= ((status & 0x3) << (6 - (i * 2))); | |
1862 | } | |
1863 | ||
52439d60 SG |
1864 | self_id |= initiated_reset(ohci); |
1865 | ||
25935ebe SG |
1866 | pos = get_self_id_pos(ohci, self_id, self_id_count); |
1867 | if (pos >= 0) { | |
1868 | memmove(&(ohci->self_id_buffer[pos+1]), | |
1869 | &(ohci->self_id_buffer[pos]), | |
1870 | (self_id_count - pos) * sizeof(*ohci->self_id_buffer)); | |
1871 | ohci->self_id_buffer[pos] = self_id; | |
1872 | self_id_count++; | |
1873 | } | |
1874 | return self_id_count; | |
1875 | } | |
1876 | ||
2d7a36e2 | 1877 | static void bus_reset_work(struct work_struct *work) |
ed568912 | 1878 | { |
2d7a36e2 SG |
1879 | struct fw_ohci *ohci = |
1880 | container_of(work, struct fw_ohci, bus_reset_work); | |
d713dfa7 SR |
1881 | int self_id_count, generation, new_generation, i, j; |
1882 | u32 reg; | |
4eaff7d6 SR |
1883 | void *free_rom = NULL; |
1884 | dma_addr_t free_rom_bus = 0; | |
4ffb7a6a | 1885 | bool is_new_root; |
ed568912 KH |
1886 | |
1887 | reg = reg_read(ohci, OHCI1394_NodeID); | |
1888 | if (!(reg & OHCI1394_NodeID_idValid)) { | |
de97cb64 PH |
1889 | ohci_notice(ohci, |
1890 | "node ID not valid, new bus reset in progress\n"); | |
ed568912 KH |
1891 | return; |
1892 | } | |
02ff8f8e | 1893 | if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { |
de97cb64 | 1894 | ohci_notice(ohci, "malconfigured bus\n"); |
02ff8f8e SR |
1895 | return; |
1896 | } | |
1897 | ohci->node_id = reg & (OHCI1394_NodeID_busNumber | | |
1898 | OHCI1394_NodeID_nodeNumber); | |
ed568912 | 1899 | |
4ffb7a6a CL |
1900 | is_new_root = (reg & OHCI1394_NodeID_root) != 0; |
1901 | if (!(ohci->is_root && is_new_root)) | |
1902 | reg_write(ohci, OHCI1394_LinkControlSet, | |
1903 | OHCI1394_LinkControl_cycleMaster); | |
1904 | ohci->is_root = is_new_root; | |
1905 | ||
c8a9a498 SR |
1906 | reg = reg_read(ohci, OHCI1394_SelfIDCount); |
1907 | if (reg & OHCI1394_SelfIDCount_selfIDError) { | |
67672134 | 1908 | ohci_notice(ohci, "self ID receive error\n"); |
c8a9a498 SR |
1909 | return; |
1910 | } | |
c781c06d KH |
1911 | /* |
1912 | * The count in the SelfIDCount register is the number of | |
ed568912 KH |
1913 | * bytes in the self ID receive buffer. Since we also receive |
1914 | * the inverted quadlets and a header quadlet, we shift one | |
c781c06d KH |
1915 | * bit extra to get the actual number of self IDs. |
1916 | */ | |
928ec5f1 | 1917 | self_id_count = (reg >> 3) & 0xff; |
25935ebe SG |
1918 | |
1919 | if (self_id_count > 252) { | |
67672134 | 1920 | ohci_notice(ohci, "bad selfIDSize (%08x)\n", reg); |
016bf3df SR |
1921 | return; |
1922 | } | |
25935ebe | 1923 | |
af53122a | 1924 | generation = (cond_le32_to_cpu(ohci->self_id[0]) >> 16) & 0xff; |
ee71c2f9 | 1925 | rmb(); |
ed568912 KH |
1926 | |
1927 | for (i = 1, j = 0; j < self_id_count; i += 2, j++) { | |
af53122a SR |
1928 | u32 id = cond_le32_to_cpu(ohci->self_id[i]); |
1929 | u32 id2 = cond_le32_to_cpu(ohci->self_id[i + 1]); | |
67672134 PH |
1930 | |
1931 | if (id != ~id2) { | |
32eaeae1 CL |
1932 | /* |
1933 | * If the invalid data looks like a cycle start packet, | |
1934 | * it's likely to be the result of the cycle master | |
1935 | * having a wrong gap count. In this case, the self IDs | |
1936 | * so far are valid and should be processed so that the | |
1937 | * bus manager can then correct the gap count. | |
1938 | */ | |
67672134 PH |
1939 | if (id == 0xffff008f) { |
1940 | ohci_notice(ohci, "ignoring spurious self IDs\n"); | |
32eaeae1 CL |
1941 | self_id_count = j; |
1942 | break; | |
32eaeae1 | 1943 | } |
67672134 PH |
1944 | |
1945 | ohci_notice(ohci, "bad self ID %d/%d (%08x != ~%08x)\n", | |
1946 | j, self_id_count, id, id2); | |
1947 | return; | |
c8a9a498 | 1948 | } |
67672134 | 1949 | ohci->self_id_buffer[j] = id; |
ed568912 | 1950 | } |
25935ebe SG |
1951 | |
1952 | if (ohci->quirks & QUIRK_TI_SLLZ059) { | |
1953 | self_id_count = find_and_insert_self_id(ohci, self_id_count); | |
1954 | if (self_id_count < 0) { | |
de97cb64 PH |
1955 | ohci_notice(ohci, |
1956 | "could not construct local self ID\n"); | |
25935ebe SG |
1957 | return; |
1958 | } | |
1959 | } | |
1960 | ||
1961 | if (self_id_count == 0) { | |
67672134 | 1962 | ohci_notice(ohci, "no self IDs\n"); |
25935ebe SG |
1963 | return; |
1964 | } | |
ee71c2f9 | 1965 | rmb(); |
ed568912 | 1966 | |
c781c06d KH |
1967 | /* |
1968 | * Check the consistency of the self IDs we just read. The | |
ed568912 KH |
1969 | * problem we face is that a new bus reset can start while we |
1970 | * read out the self IDs from the DMA buffer. If this happens, | |
1971 | * the DMA buffer will be overwritten with new self IDs and we | |
1972 | * will read out inconsistent data. The OHCI specification | |
1973 | * (section 11.2) recommends a technique similar to | |
1974 | * linux/seqlock.h, where we remember the generation of the | |
1975 | * self IDs in the buffer before reading them out and compare | |
1976 | * it to the current generation after reading them out. If | |
1977 | * the two generations match we know we have a consistent set | |
c781c06d KH |
1978 | * of self IDs. |
1979 | */ | |
ed568912 KH |
1980 | |
1981 | new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff; | |
1982 | if (new_generation != generation) { | |
de97cb64 | 1983 | ohci_notice(ohci, "new bus reset, discarding self ids\n"); |
ed568912 KH |
1984 | return; |
1985 | } | |
1986 | ||
1987 | /* FIXME: Document how the locking works. */ | |
8a8c4736 | 1988 | spin_lock_irq(&ohci->lock); |
ed568912 | 1989 | |
82b662dc | 1990 | ohci->generation = -1; /* prevent AT packet queueing */ |
f319b6a0 KH |
1991 | context_stop(&ohci->at_request_ctx); |
1992 | context_stop(&ohci->at_response_ctx); | |
82b662dc | 1993 | |
8a8c4736 | 1994 | spin_unlock_irq(&ohci->lock); |
82b662dc | 1995 | |
78dec56d SR |
1996 | /* |
1997 | * Per OHCI 1.2 draft, clause 7.2.3.3, hardware may leave unsent | |
1998 | * packets in the AT queues and software needs to drain them. | |
1999 | * Some OHCI 1.1 controllers (JMicron) apparently require this too. | |
2000 | */ | |
82b662dc CL |
2001 | at_context_flush(&ohci->at_request_ctx); |
2002 | at_context_flush(&ohci->at_response_ctx); | |
2003 | ||
8a8c4736 | 2004 | spin_lock_irq(&ohci->lock); |
82b662dc CL |
2005 | |
2006 | ohci->generation = generation; | |
ed568912 KH |
2007 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); |
2008 | ||
4a635593 | 2009 | if (ohci->quirks & QUIRK_RESET_PACKET) |
d34316a4 SR |
2010 | ohci->request_generation = generation; |
2011 | ||
c781c06d KH |
2012 | /* |
2013 | * This next bit is unrelated to the AT context stuff but we | |
ed568912 KH |
2014 | * have to do it under the spinlock also. If a new config rom |
2015 | * was set up before this reset, the old one is now no longer | |
2016 | * in use and we can free it. Update the config rom pointers | |
2017 | * to point to the current config rom and clear the | |
88393161 | 2018 | * next_config_rom pointer so a new update can take place. |
c781c06d | 2019 | */ |
ed568912 KH |
2020 | |
2021 | if (ohci->next_config_rom != NULL) { | |
0bd243c4 KH |
2022 | if (ohci->next_config_rom != ohci->config_rom) { |
2023 | free_rom = ohci->config_rom; | |
2024 | free_rom_bus = ohci->config_rom_bus; | |
2025 | } | |
ed568912 KH |
2026 | ohci->config_rom = ohci->next_config_rom; |
2027 | ohci->config_rom_bus = ohci->next_config_rom_bus; | |
2028 | ohci->next_config_rom = NULL; | |
2029 | ||
c781c06d KH |
2030 | /* |
2031 | * Restore config_rom image and manually update | |
ed568912 KH |
2032 | * config_rom registers. Writing the header quadlet |
2033 | * will indicate that the config rom is ready, so we | |
c781c06d KH |
2034 | * do that last. |
2035 | */ | |
ed568912 KH |
2036 | reg_write(ohci, OHCI1394_BusOptions, |
2037 | be32_to_cpu(ohci->config_rom[2])); | |
8e85973e SR |
2038 | ohci->config_rom[0] = ohci->next_header; |
2039 | reg_write(ohci, OHCI1394_ConfigROMhdr, | |
2040 | be32_to_cpu(ohci->next_header)); | |
ed568912 KH |
2041 | } |
2042 | ||
8bc588e0 LR |
2043 | if (param_remote_dma) { |
2044 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); | |
2045 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); | |
2046 | } | |
080de8c2 | 2047 | |
8a8c4736 | 2048 | spin_unlock_irq(&ohci->lock); |
ed568912 | 2049 | |
4eaff7d6 SR |
2050 | if (free_rom) |
2051 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2052 | free_rom, free_rom_bus); | |
2053 | ||
64d21720 | 2054 | log_selfids(ohci, generation, self_id_count); |
ad3c0fe8 | 2055 | |
e636fe25 | 2056 | fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation, |
c8a94ded SR |
2057 | self_id_count, ohci->self_id_buffer, |
2058 | ohci->csr_state_setclear_abdicate); | |
2059 | ohci->csr_state_setclear_abdicate = false; | |
ed568912 KH |
2060 | } |
2061 | ||
2062 | static irqreturn_t irq_handler(int irq, void *data) | |
2063 | { | |
2064 | struct fw_ohci *ohci = data; | |
168cf9af | 2065 | u32 event, iso_event; |
ed568912 KH |
2066 | int i; |
2067 | ||
2068 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
2069 | ||
a515958d | 2070 | if (!event || !~event) |
ed568912 KH |
2071 | return IRQ_NONE; |
2072 | ||
8327b37b CL |
2073 | /* |
2074 | * busReset and postedWriteErr must not be cleared yet | |
2075 | * (OHCI 1.1 clauses 7.2.3.2 and 13.2.8.1) | |
2076 | */ | |
2077 | reg_write(ohci, OHCI1394_IntEventClear, | |
2078 | event & ~(OHCI1394_busReset | OHCI1394_postedWriteErr)); | |
64d21720 | 2079 | log_irqs(ohci, event); |
ed568912 KH |
2080 | |
2081 | if (event & OHCI1394_selfIDComplete) | |
db9ae8fe | 2082 | queue_work(selfid_workqueue, &ohci->bus_reset_work); |
ed568912 KH |
2083 | |
2084 | if (event & OHCI1394_RQPkt) | |
2085 | tasklet_schedule(&ohci->ar_request_ctx.tasklet); | |
2086 | ||
2087 | if (event & OHCI1394_RSPkt) | |
2088 | tasklet_schedule(&ohci->ar_response_ctx.tasklet); | |
2089 | ||
2090 | if (event & OHCI1394_reqTxComplete) | |
2091 | tasklet_schedule(&ohci->at_request_ctx.tasklet); | |
2092 | ||
2093 | if (event & OHCI1394_respTxComplete) | |
2094 | tasklet_schedule(&ohci->at_response_ctx.tasklet); | |
2095 | ||
2dd5bed5 CL |
2096 | if (event & OHCI1394_isochRx) { |
2097 | iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear); | |
2098 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event); | |
2099 | ||
2100 | while (iso_event) { | |
2101 | i = ffs(iso_event) - 1; | |
2102 | tasklet_schedule( | |
2103 | &ohci->ir_context_list[i].context.tasklet); | |
2104 | iso_event &= ~(1 << i); | |
2105 | } | |
ed568912 KH |
2106 | } |
2107 | ||
2dd5bed5 CL |
2108 | if (event & OHCI1394_isochTx) { |
2109 | iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear); | |
2110 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event); | |
ed568912 | 2111 | |
2dd5bed5 CL |
2112 | while (iso_event) { |
2113 | i = ffs(iso_event) - 1; | |
2114 | tasklet_schedule( | |
2115 | &ohci->it_context_list[i].context.tasklet); | |
2116 | iso_event &= ~(1 << i); | |
2117 | } | |
ed568912 KH |
2118 | } |
2119 | ||
75f7832e | 2120 | if (unlikely(event & OHCI1394_regAccessFail)) |
de97cb64 | 2121 | ohci_err(ohci, "register access failure\n"); |
75f7832e | 2122 | |
8327b37b CL |
2123 | if (unlikely(event & OHCI1394_postedWriteErr)) { |
2124 | reg_read(ohci, OHCI1394_PostedWriteAddressHi); | |
2125 | reg_read(ohci, OHCI1394_PostedWriteAddressLo); | |
2126 | reg_write(ohci, OHCI1394_IntEventClear, | |
2127 | OHCI1394_postedWriteErr); | |
a74477db | 2128 | if (printk_ratelimit()) |
de97cb64 | 2129 | ohci_err(ohci, "PCI posted write error\n"); |
8327b37b | 2130 | } |
e524f616 | 2131 | |
bb9f2206 SR |
2132 | if (unlikely(event & OHCI1394_cycleTooLong)) { |
2133 | if (printk_ratelimit()) | |
de97cb64 | 2134 | ohci_notice(ohci, "isochronous cycle too long\n"); |
bb9f2206 SR |
2135 | reg_write(ohci, OHCI1394_LinkControlSet, |
2136 | OHCI1394_LinkControl_cycleMaster); | |
2137 | } | |
2138 | ||
5ed1f321 JF |
2139 | if (unlikely(event & OHCI1394_cycleInconsistent)) { |
2140 | /* | |
2141 | * We need to clear this event bit in order to make | |
2142 | * cycleMatch isochronous I/O work. In theory we should | |
2143 | * stop active cycleMatch iso contexts now and restart | |
2144 | * them at least two cycles later. (FIXME?) | |
2145 | */ | |
2146 | if (printk_ratelimit()) | |
de97cb64 | 2147 | ohci_notice(ohci, "isochronous cycle inconsistent\n"); |
5ed1f321 JF |
2148 | } |
2149 | ||
f117a3e3 CL |
2150 | if (unlikely(event & OHCI1394_unrecoverableError)) |
2151 | handle_dead_contexts(ohci); | |
2152 | ||
a48777e0 CL |
2153 | if (event & OHCI1394_cycle64Seconds) { |
2154 | spin_lock(&ohci->lock); | |
2155 | update_bus_time(ohci); | |
2156 | spin_unlock(&ohci->lock); | |
e597e989 CL |
2157 | } else |
2158 | flush_writes(ohci); | |
a48777e0 | 2159 | |
ed568912 KH |
2160 | return IRQ_HANDLED; |
2161 | } | |
2162 | ||
2aef469a KH |
2163 | static int software_reset(struct fw_ohci *ohci) |
2164 | { | |
9f426173 | 2165 | u32 val; |
2aef469a KH |
2166 | int i; |
2167 | ||
2168 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
9f426173 SR |
2169 | for (i = 0; i < 500; i++) { |
2170 | val = reg_read(ohci, OHCI1394_HCControlSet); | |
2171 | if (!~val) | |
2172 | return -ENODEV; /* Card was ejected. */ | |
2aef469a | 2173 | |
9f426173 | 2174 | if (!(val & OHCI1394_HCControl_softReset)) |
2aef469a | 2175 | return 0; |
9f426173 | 2176 | |
2aef469a KH |
2177 | msleep(1); |
2178 | } | |
2179 | ||
2180 | return -EBUSY; | |
2181 | } | |
2182 | ||
8e85973e SR |
2183 | static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length) |
2184 | { | |
2185 | size_t size = length * 4; | |
2186 | ||
2187 | memcpy(dest, src, size); | |
2188 | if (size < CONFIG_ROM_SIZE) | |
2189 | memset(&dest[length], 0, CONFIG_ROM_SIZE - size); | |
2190 | } | |
2191 | ||
925e7a65 CL |
2192 | static int configure_1394a_enhancements(struct fw_ohci *ohci) |
2193 | { | |
2194 | bool enable_1394a; | |
35d999b1 | 2195 | int ret, clear, set, offset; |
925e7a65 CL |
2196 | |
2197 | /* Check if the driver should configure link and PHY. */ | |
2198 | if (!(reg_read(ohci, OHCI1394_HCControlSet) & | |
2199 | OHCI1394_HCControl_programPhyEnable)) | |
2200 | return 0; | |
2201 | ||
2202 | /* Paranoia: check whether the PHY supports 1394a, too. */ | |
2203 | enable_1394a = false; | |
35d999b1 SR |
2204 | ret = read_phy_reg(ohci, 2); |
2205 | if (ret < 0) | |
2206 | return ret; | |
2207 | if ((ret & PHY_EXTENDED_REGISTERS) == PHY_EXTENDED_REGISTERS) { | |
2208 | ret = read_paged_phy_reg(ohci, 1, 8); | |
2209 | if (ret < 0) | |
2210 | return ret; | |
2211 | if (ret >= 1) | |
925e7a65 CL |
2212 | enable_1394a = true; |
2213 | } | |
2214 | ||
2215 | if (ohci->quirks & QUIRK_NO_1394A) | |
2216 | enable_1394a = false; | |
2217 | ||
2218 | /* Configure PHY and link consistently. */ | |
2219 | if (enable_1394a) { | |
2220 | clear = 0; | |
2221 | set = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; | |
2222 | } else { | |
2223 | clear = PHY_ENABLE_ACCEL | PHY_ENABLE_MULTI; | |
2224 | set = 0; | |
2225 | } | |
02d37bed | 2226 | ret = update_phy_reg(ohci, 5, clear, set); |
35d999b1 SR |
2227 | if (ret < 0) |
2228 | return ret; | |
925e7a65 CL |
2229 | |
2230 | if (enable_1394a) | |
2231 | offset = OHCI1394_HCControlSet; | |
2232 | else | |
2233 | offset = OHCI1394_HCControlClear; | |
2234 | reg_write(ohci, offset, OHCI1394_HCControl_aPhyEnhanceEnable); | |
2235 | ||
2236 | /* Clean up: configuration has been taken care of. */ | |
2237 | reg_write(ohci, OHCI1394_HCControlClear, | |
2238 | OHCI1394_HCControl_programPhyEnable); | |
2239 | ||
2240 | return 0; | |
2241 | } | |
2242 | ||
25935ebe SG |
2243 | static int probe_tsb41ba3d(struct fw_ohci *ohci) |
2244 | { | |
b810e4ae SR |
2245 | /* TI vendor ID = 0x080028, TSB41BA3D product ID = 0x833005 (sic) */ |
2246 | static const u8 id[] = { 0x08, 0x00, 0x28, 0x83, 0x30, 0x05, }; | |
2247 | int reg, i; | |
25935ebe SG |
2248 | |
2249 | reg = read_phy_reg(ohci, 2); | |
2250 | if (reg < 0) | |
2251 | return reg; | |
b810e4ae SR |
2252 | if ((reg & PHY_EXTENDED_REGISTERS) != PHY_EXTENDED_REGISTERS) |
2253 | return 0; | |
25935ebe | 2254 | |
b810e4ae SR |
2255 | for (i = ARRAY_SIZE(id) - 1; i >= 0; i--) { |
2256 | reg = read_paged_phy_reg(ohci, 1, i + 10); | |
2257 | if (reg < 0) | |
2258 | return reg; | |
2259 | if (reg != id[i]) | |
2260 | return 0; | |
25935ebe | 2261 | } |
b810e4ae | 2262 | return 1; |
25935ebe SG |
2263 | } |
2264 | ||
8e85973e SR |
2265 | static int ohci_enable(struct fw_card *card, |
2266 | const __be32 *config_rom, size_t length) | |
ed568912 KH |
2267 | { |
2268 | struct fw_ohci *ohci = fw_ohci(card); | |
9d60ef2b | 2269 | u32 lps, version, irqs; |
28897fb7 | 2270 | int i, ret; |
ed568912 | 2271 | |
a354cf00 SR |
2272 | ret = software_reset(ohci); |
2273 | if (ret < 0) { | |
de97cb64 | 2274 | ohci_err(ohci, "failed to reset ohci card\n"); |
a354cf00 | 2275 | return ret; |
2aef469a KH |
2276 | } |
2277 | ||
2278 | /* | |
2279 | * Now enable LPS, which we need in order to start accessing | |
2280 | * most of the registers. In fact, on some cards (ALI M5251), | |
2281 | * accessing registers in the SClk domain without LPS enabled | |
2282 | * will lock up the machine. Wait 50msec to make sure we have | |
02214724 JW |
2283 | * full link enabled. However, with some cards (well, at least |
2284 | * a JMicron PCIe card), we have to try again sometimes. | |
bd972688 PH |
2285 | * |
2286 | * TI TSB82AA2 + TSB81BA3(A) cards signal LPS enabled early but | |
2287 | * cannot actually use the phy at that time. These need tens of | |
2288 | * millisecods pause between LPS write and first phy access too. | |
2aef469a | 2289 | */ |
bd972688 | 2290 | |
2aef469a KH |
2291 | reg_write(ohci, OHCI1394_HCControlSet, |
2292 | OHCI1394_HCControl_LPS | | |
2293 | OHCI1394_HCControl_postedWriteEnable); | |
2294 | flush_writes(ohci); | |
02214724 | 2295 | |
0ca49345 | 2296 | for (lps = 0, i = 0; !lps && i < 3; i++) { |
02214724 JW |
2297 | msleep(50); |
2298 | lps = reg_read(ohci, OHCI1394_HCControlSet) & | |
2299 | OHCI1394_HCControl_LPS; | |
2300 | } | |
2301 | ||
2302 | if (!lps) { | |
de97cb64 | 2303 | ohci_err(ohci, "failed to set Link Power Status\n"); |
02214724 JW |
2304 | return -EIO; |
2305 | } | |
2aef469a | 2306 | |
25935ebe | 2307 | if (ohci->quirks & QUIRK_TI_SLLZ059) { |
28897fb7 SR |
2308 | ret = probe_tsb41ba3d(ohci); |
2309 | if (ret < 0) | |
2310 | return ret; | |
2311 | if (ret) | |
de97cb64 | 2312 | ohci_notice(ohci, "local TSB41BA3D phy\n"); |
28897fb7 | 2313 | else |
25935ebe | 2314 | ohci->quirks &= ~QUIRK_TI_SLLZ059; |
25935ebe SG |
2315 | } |
2316 | ||
2aef469a KH |
2317 | reg_write(ohci, OHCI1394_HCControlClear, |
2318 | OHCI1394_HCControl_noByteSwapData); | |
2319 | ||
affc9c24 | 2320 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus); |
2aef469a | 2321 | reg_write(ohci, OHCI1394_LinkControlSet, |
2aef469a KH |
2322 | OHCI1394_LinkControl_cycleTimerEnable | |
2323 | OHCI1394_LinkControl_cycleMaster); | |
2324 | ||
2325 | reg_write(ohci, OHCI1394_ATRetries, | |
2326 | OHCI1394_MAX_AT_REQ_RETRIES | | |
2327 | (OHCI1394_MAX_AT_RESP_RETRIES << 4) | | |
27a2329f CL |
2328 | (OHCI1394_MAX_PHYS_RESP_RETRIES << 8) | |
2329 | (200 << 16)); | |
2aef469a | 2330 | |
9d60ef2b | 2331 | ohci->bus_time_running = false; |
a48777e0 | 2332 | |
e18907cc CL |
2333 | for (i = 0; i < 32; i++) |
2334 | if (ohci->ir_context_support & (1 << i)) | |
2335 | reg_write(ohci, OHCI1394_IsoRcvContextControlClear(i), | |
2336 | IR_CONTEXT_MULTI_CHANNEL_MODE); | |
2337 | ||
e91b2787 CL |
2338 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
2339 | if (version >= OHCI_VERSION_1_1) { | |
2340 | reg_write(ohci, OHCI1394_InitialChannelsAvailableHi, | |
2341 | 0xfffffffe); | |
db3c9cc1 | 2342 | card->broadcast_channel_auto_allocated = true; |
e91b2787 CL |
2343 | } |
2344 | ||
a1a1132b CL |
2345 | /* Get implemented bits of the priority arbitration request counter. */ |
2346 | reg_write(ohci, OHCI1394_FairnessControl, 0x3f); | |
2347 | ohci->pri_req_max = reg_read(ohci, OHCI1394_FairnessControl) & 0x3f; | |
2348 | reg_write(ohci, OHCI1394_FairnessControl, 0); | |
db3c9cc1 | 2349 | card->priority_budget_implemented = ohci->pri_req_max != 0; |
2aef469a | 2350 | |
fcd46b34 | 2351 | reg_write(ohci, OHCI1394_PhyUpperBound, FW_MAX_PHYSICAL_RANGE >> 16); |
2aef469a KH |
2352 | reg_write(ohci, OHCI1394_IntEventClear, ~0); |
2353 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
2aef469a | 2354 | |
35d999b1 SR |
2355 | ret = configure_1394a_enhancements(ohci); |
2356 | if (ret < 0) | |
2357 | return ret; | |
925e7a65 | 2358 | |
2aef469a | 2359 | /* Activate link_on bit and contender bit in our self ID packets.*/ |
35d999b1 SR |
2360 | ret = ohci_update_phy_reg(card, 4, 0, PHY_LINK_ACTIVE | PHY_CONTENDER); |
2361 | if (ret < 0) | |
2362 | return ret; | |
2aef469a | 2363 | |
c781c06d KH |
2364 | /* |
2365 | * When the link is not yet enabled, the atomic config rom | |
ed568912 KH |
2366 | * update mechanism described below in ohci_set_config_rom() |
2367 | * is not active. We have to update ConfigRomHeader and | |
2368 | * BusOptions manually, and the write to ConfigROMmap takes | |
2369 | * effect immediately. We tie this to the enabling of the | |
2370 | * link, so we have a valid config rom before enabling - the | |
2371 | * OHCI requires that ConfigROMhdr and BusOptions have valid | |
2372 | * values before enabling. | |
2373 | * | |
2374 | * However, when the ConfigROMmap is written, some controllers | |
2375 | * always read back quadlets 0 and 2 from the config rom to | |
2376 | * the ConfigRomHeader and BusOptions registers on bus reset. | |
2377 | * They shouldn't do that in this initial case where the link | |
2378 | * isn't enabled. This means we have to use the same | |
2379 | * workaround here, setting the bus header to 0 and then write | |
2380 | * the right values in the bus reset tasklet. | |
2381 | */ | |
2382 | ||
0bd243c4 KH |
2383 | if (config_rom) { |
2384 | ohci->next_config_rom = | |
2385 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2386 | &ohci->next_config_rom_bus, | |
2387 | GFP_KERNEL); | |
2388 | if (ohci->next_config_rom == NULL) | |
2389 | return -ENOMEM; | |
ed568912 | 2390 | |
8e85973e | 2391 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
0bd243c4 KH |
2392 | } else { |
2393 | /* | |
2394 | * In the suspend case, config_rom is NULL, which | |
2395 | * means that we just reuse the old config rom. | |
2396 | */ | |
2397 | ohci->next_config_rom = ohci->config_rom; | |
2398 | ohci->next_config_rom_bus = ohci->config_rom_bus; | |
2399 | } | |
ed568912 | 2400 | |
8e85973e | 2401 | ohci->next_header = ohci->next_config_rom[0]; |
ed568912 KH |
2402 | ohci->next_config_rom[0] = 0; |
2403 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
0bd243c4 KH |
2404 | reg_write(ohci, OHCI1394_BusOptions, |
2405 | be32_to_cpu(ohci->next_config_rom[2])); | |
ed568912 KH |
2406 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
2407 | ||
2408 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
2409 | ||
148c7866 SR |
2410 | irqs = OHCI1394_reqTxComplete | OHCI1394_respTxComplete | |
2411 | OHCI1394_RQPkt | OHCI1394_RSPkt | | |
2412 | OHCI1394_isochTx | OHCI1394_isochRx | | |
2413 | OHCI1394_postedWriteErr | | |
2414 | OHCI1394_selfIDComplete | | |
2415 | OHCI1394_regAccessFail | | |
f117a3e3 CL |
2416 | OHCI1394_cycleInconsistent | |
2417 | OHCI1394_unrecoverableError | | |
2418 | OHCI1394_cycleTooLong | | |
148c7866 SR |
2419 | OHCI1394_masterIntEnable; |
2420 | if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS) | |
2421 | irqs |= OHCI1394_busReset; | |
2422 | reg_write(ohci, OHCI1394_IntMaskSet, irqs); | |
2423 | ||
ed568912 KH |
2424 | reg_write(ohci, OHCI1394_HCControlSet, |
2425 | OHCI1394_HCControl_linkEnable | | |
2426 | OHCI1394_HCControl_BIBimageValid); | |
ecf8328e CL |
2427 | |
2428 | reg_write(ohci, OHCI1394_LinkControlSet, | |
2429 | OHCI1394_LinkControl_rcvSelfID | | |
2430 | OHCI1394_LinkControl_rcvPhyPkt); | |
2431 | ||
2432 | ar_context_run(&ohci->ar_request_ctx); | |
dd6254e5 CL |
2433 | ar_context_run(&ohci->ar_response_ctx); |
2434 | ||
2435 | flush_writes(ohci); | |
ed568912 | 2436 | |
02d37bed SR |
2437 | /* We are ready to go, reset bus to finish initialization. */ |
2438 | fw_schedule_bus_reset(&ohci->card, false, true); | |
ed568912 KH |
2439 | |
2440 | return 0; | |
2441 | } | |
2442 | ||
53dca511 | 2443 | static int ohci_set_config_rom(struct fw_card *card, |
8e85973e | 2444 | const __be32 *config_rom, size_t length) |
ed568912 KH |
2445 | { |
2446 | struct fw_ohci *ohci; | |
ed568912 | 2447 | __be32 *next_config_rom; |
f5101d58 | 2448 | dma_addr_t uninitialized_var(next_config_rom_bus); |
ed568912 KH |
2449 | |
2450 | ohci = fw_ohci(card); | |
2451 | ||
c781c06d KH |
2452 | /* |
2453 | * When the OHCI controller is enabled, the config rom update | |
ed568912 KH |
2454 | * mechanism is a bit tricky, but easy enough to use. See |
2455 | * section 5.5.6 in the OHCI specification. | |
2456 | * | |
2457 | * The OHCI controller caches the new config rom address in a | |
2458 | * shadow register (ConfigROMmapNext) and needs a bus reset | |
2459 | * for the changes to take place. When the bus reset is | |
2460 | * detected, the controller loads the new values for the | |
2461 | * ConfigRomHeader and BusOptions registers from the specified | |
2462 | * config rom and loads ConfigROMmap from the ConfigROMmapNext | |
2463 | * shadow register. All automatically and atomically. | |
2464 | * | |
2465 | * Now, there's a twist to this story. The automatic load of | |
2466 | * ConfigRomHeader and BusOptions doesn't honor the | |
2467 | * noByteSwapData bit, so with a be32 config rom, the | |
2468 | * controller will load be32 values in to these registers | |
2469 | * during the atomic update, even on litte endian | |
2470 | * architectures. The workaround we use is to put a 0 in the | |
2471 | * header quadlet; 0 is endian agnostic and means that the | |
2472 | * config rom isn't ready yet. In the bus reset tasklet we | |
2473 | * then set up the real values for the two registers. | |
2474 | * | |
2475 | * We use ohci->lock to avoid racing with the code that sets | |
2d7a36e2 | 2476 | * ohci->next_config_rom to NULL (see bus_reset_work). |
ed568912 KH |
2477 | */ |
2478 | ||
2479 | next_config_rom = | |
2480 | dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2481 | &next_config_rom_bus, GFP_KERNEL); | |
2482 | if (next_config_rom == NULL) | |
2483 | return -ENOMEM; | |
2484 | ||
8a8c4736 | 2485 | spin_lock_irq(&ohci->lock); |
ed568912 | 2486 | |
2e053a27 B |
2487 | /* |
2488 | * If there is not an already pending config_rom update, | |
2489 | * push our new allocation into the ohci->next_config_rom | |
2490 | * and then mark the local variable as null so that we | |
2491 | * won't deallocate the new buffer. | |
2492 | * | |
2493 | * OTOH, if there is a pending config_rom update, just | |
2494 | * use that buffer with the new config_rom data, and | |
2495 | * let this routine free the unused DMA allocation. | |
2496 | */ | |
2497 | ||
ed568912 KH |
2498 | if (ohci->next_config_rom == NULL) { |
2499 | ohci->next_config_rom = next_config_rom; | |
2500 | ohci->next_config_rom_bus = next_config_rom_bus; | |
2e053a27 B |
2501 | next_config_rom = NULL; |
2502 | } | |
ed568912 | 2503 | |
2e053a27 | 2504 | copy_config_rom(ohci->next_config_rom, config_rom, length); |
ed568912 | 2505 | |
2e053a27 B |
2506 | ohci->next_header = config_rom[0]; |
2507 | ohci->next_config_rom[0] = 0; | |
ed568912 | 2508 | |
2e053a27 | 2509 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); |
ed568912 | 2510 | |
8a8c4736 | 2511 | spin_unlock_irq(&ohci->lock); |
ed568912 | 2512 | |
2e053a27 B |
2513 | /* If we didn't use the DMA allocation, delete it. */ |
2514 | if (next_config_rom != NULL) | |
2515 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
2516 | next_config_rom, next_config_rom_bus); | |
2517 | ||
c781c06d KH |
2518 | /* |
2519 | * Now initiate a bus reset to have the changes take | |
ed568912 KH |
2520 | * effect. We clean up the old config rom memory and DMA |
2521 | * mappings in the bus reset tasklet, since the OHCI | |
2522 | * controller could need to access it before the bus reset | |
c781c06d KH |
2523 | * takes effect. |
2524 | */ | |
ed568912 | 2525 | |
2e053a27 B |
2526 | fw_schedule_bus_reset(&ohci->card, true, true); |
2527 | ||
2528 | return 0; | |
ed568912 KH |
2529 | } |
2530 | ||
2531 | static void ohci_send_request(struct fw_card *card, struct fw_packet *packet) | |
2532 | { | |
2533 | struct fw_ohci *ohci = fw_ohci(card); | |
2534 | ||
2535 | at_context_transmit(&ohci->at_request_ctx, packet); | |
2536 | } | |
2537 | ||
2538 | static void ohci_send_response(struct fw_card *card, struct fw_packet *packet) | |
2539 | { | |
2540 | struct fw_ohci *ohci = fw_ohci(card); | |
2541 | ||
2542 | at_context_transmit(&ohci->at_response_ctx, packet); | |
2543 | } | |
2544 | ||
730c32f5 KH |
2545 | static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
2546 | { | |
2547 | struct fw_ohci *ohci = fw_ohci(card); | |
f319b6a0 KH |
2548 | struct context *ctx = &ohci->at_request_ctx; |
2549 | struct driver_data *driver_data = packet->driver_data; | |
2dbd7d7e | 2550 | int ret = -ENOENT; |
730c32f5 | 2551 | |
f319b6a0 | 2552 | tasklet_disable(&ctx->tasklet); |
730c32f5 | 2553 | |
f319b6a0 KH |
2554 | if (packet->ack != 0) |
2555 | goto out; | |
730c32f5 | 2556 | |
19593ffd | 2557 | if (packet->payload_mapped) |
1d1dc5e8 SR |
2558 | dma_unmap_single(ohci->card.device, packet->payload_bus, |
2559 | packet->payload_length, DMA_TO_DEVICE); | |
2560 | ||
64d21720 | 2561 | log_ar_at_event(ohci, 'T', packet->speed, packet->header, 0x20); |
f319b6a0 KH |
2562 | driver_data->packet = NULL; |
2563 | packet->ack = RCODE_CANCELLED; | |
2564 | packet->callback(packet, &ohci->card, packet->ack); | |
2dbd7d7e | 2565 | ret = 0; |
f319b6a0 KH |
2566 | out: |
2567 | tasklet_enable(&ctx->tasklet); | |
730c32f5 | 2568 | |
2dbd7d7e | 2569 | return ret; |
730c32f5 KH |
2570 | } |
2571 | ||
53dca511 SR |
2572 | static int ohci_enable_phys_dma(struct fw_card *card, |
2573 | int node_id, int generation) | |
ed568912 KH |
2574 | { |
2575 | struct fw_ohci *ohci = fw_ohci(card); | |
2576 | unsigned long flags; | |
2dbd7d7e | 2577 | int n, ret = 0; |
ed568912 | 2578 | |
8bc588e0 LR |
2579 | if (param_remote_dma) |
2580 | return 0; | |
2581 | ||
c781c06d KH |
2582 | /* |
2583 | * FIXME: Make sure this bitmask is cleared when we clear the busReset | |
2584 | * interrupt bit. Clear physReqResourceAllBuses on bus reset. | |
2585 | */ | |
ed568912 KH |
2586 | |
2587 | spin_lock_irqsave(&ohci->lock, flags); | |
2588 | ||
2589 | if (ohci->generation != generation) { | |
2dbd7d7e | 2590 | ret = -ESTALE; |
ed568912 KH |
2591 | goto out; |
2592 | } | |
2593 | ||
c781c06d KH |
2594 | /* |
2595 | * Note, if the node ID contains a non-local bus ID, physical DMA is | |
2596 | * enabled for _all_ nodes on remote buses. | |
2597 | */ | |
907293d7 SR |
2598 | |
2599 | n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63; | |
2600 | if (n < 32) | |
2601 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n); | |
2602 | else | |
2603 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32)); | |
2604 | ||
ed568912 | 2605 | flush_writes(ohci); |
ed568912 | 2606 | out: |
6cad95fe | 2607 | spin_unlock_irqrestore(&ohci->lock, flags); |
2dbd7d7e SR |
2608 | |
2609 | return ret; | |
ed568912 | 2610 | } |
373b2edd | 2611 | |
0fcff4e3 | 2612 | static u32 ohci_read_csr(struct fw_card *card, int csr_offset) |
b677532b | 2613 | { |
60d32970 | 2614 | struct fw_ohci *ohci = fw_ohci(card); |
a48777e0 CL |
2615 | unsigned long flags; |
2616 | u32 value; | |
60d32970 CL |
2617 | |
2618 | switch (csr_offset) { | |
4ffb7a6a CL |
2619 | case CSR_STATE_CLEAR: |
2620 | case CSR_STATE_SET: | |
4ffb7a6a CL |
2621 | if (ohci->is_root && |
2622 | (reg_read(ohci, OHCI1394_LinkControlSet) & | |
2623 | OHCI1394_LinkControl_cycleMaster)) | |
c8a94ded | 2624 | value = CSR_STATE_BIT_CMSTR; |
4ffb7a6a | 2625 | else |
c8a94ded SR |
2626 | value = 0; |
2627 | if (ohci->csr_state_setclear_abdicate) | |
2628 | value |= CSR_STATE_BIT_ABDICATE; | |
b677532b | 2629 | |
c8a94ded | 2630 | return value; |
4a9bde9b | 2631 | |
506f1a31 CL |
2632 | case CSR_NODE_IDS: |
2633 | return reg_read(ohci, OHCI1394_NodeID) << 16; | |
2634 | ||
60d32970 CL |
2635 | case CSR_CYCLE_TIME: |
2636 | return get_cycle_time(ohci); | |
2637 | ||
a48777e0 CL |
2638 | case CSR_BUS_TIME: |
2639 | /* | |
2640 | * We might be called just after the cycle timer has wrapped | |
2641 | * around but just before the cycle64Seconds handler, so we | |
2642 | * better check here, too, if the bus time needs to be updated. | |
2643 | */ | |
2644 | spin_lock_irqsave(&ohci->lock, flags); | |
2645 | value = update_bus_time(ohci); | |
2646 | spin_unlock_irqrestore(&ohci->lock, flags); | |
2647 | return value; | |
2648 | ||
27a2329f CL |
2649 | case CSR_BUSY_TIMEOUT: |
2650 | value = reg_read(ohci, OHCI1394_ATRetries); | |
2651 | return (value >> 4) & 0x0ffff00f; | |
2652 | ||
a1a1132b CL |
2653 | case CSR_PRIORITY_BUDGET: |
2654 | return (reg_read(ohci, OHCI1394_FairnessControl) & 0x3f) | | |
2655 | (ohci->pri_req_max << 8); | |
2656 | ||
60d32970 CL |
2657 | default: |
2658 | WARN_ON(1); | |
2659 | return 0; | |
2660 | } | |
b677532b CL |
2661 | } |
2662 | ||
0fcff4e3 | 2663 | static void ohci_write_csr(struct fw_card *card, int csr_offset, u32 value) |
d60d7f1d KH |
2664 | { |
2665 | struct fw_ohci *ohci = fw_ohci(card); | |
a48777e0 | 2666 | unsigned long flags; |
d60d7f1d | 2667 | |
506f1a31 | 2668 | switch (csr_offset) { |
4ffb7a6a | 2669 | case CSR_STATE_CLEAR: |
4ffb7a6a CL |
2670 | if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { |
2671 | reg_write(ohci, OHCI1394_LinkControlClear, | |
2672 | OHCI1394_LinkControl_cycleMaster); | |
2673 | flush_writes(ohci); | |
2674 | } | |
c8a94ded SR |
2675 | if (value & CSR_STATE_BIT_ABDICATE) |
2676 | ohci->csr_state_setclear_abdicate = false; | |
4ffb7a6a | 2677 | break; |
4a9bde9b | 2678 | |
4ffb7a6a CL |
2679 | case CSR_STATE_SET: |
2680 | if ((value & CSR_STATE_BIT_CMSTR) && ohci->is_root) { | |
2681 | reg_write(ohci, OHCI1394_LinkControlSet, | |
2682 | OHCI1394_LinkControl_cycleMaster); | |
2683 | flush_writes(ohci); | |
2684 | } | |
c8a94ded SR |
2685 | if (value & CSR_STATE_BIT_ABDICATE) |
2686 | ohci->csr_state_setclear_abdicate = true; | |
4ffb7a6a | 2687 | break; |
d60d7f1d | 2688 | |
506f1a31 CL |
2689 | case CSR_NODE_IDS: |
2690 | reg_write(ohci, OHCI1394_NodeID, value >> 16); | |
2691 | flush_writes(ohci); | |
2692 | break; | |
2693 | ||
9ab5071c CL |
2694 | case CSR_CYCLE_TIME: |
2695 | reg_write(ohci, OHCI1394_IsochronousCycleTimer, value); | |
2696 | reg_write(ohci, OHCI1394_IntEventSet, | |
2697 | OHCI1394_cycleInconsistent); | |
2698 | flush_writes(ohci); | |
2699 | break; | |
2700 | ||
a48777e0 CL |
2701 | case CSR_BUS_TIME: |
2702 | spin_lock_irqsave(&ohci->lock, flags); | |
9d60ef2b CL |
2703 | ohci->bus_time = (update_bus_time(ohci) & 0x40) | |
2704 | (value & ~0x7f); | |
a48777e0 CL |
2705 | spin_unlock_irqrestore(&ohci->lock, flags); |
2706 | break; | |
2707 | ||
27a2329f CL |
2708 | case CSR_BUSY_TIMEOUT: |
2709 | value = (value & 0xf) | ((value & 0xf) << 4) | | |
2710 | ((value & 0xf) << 8) | ((value & 0x0ffff000) << 4); | |
2711 | reg_write(ohci, OHCI1394_ATRetries, value); | |
2712 | flush_writes(ohci); | |
2713 | break; | |
2714 | ||
a1a1132b CL |
2715 | case CSR_PRIORITY_BUDGET: |
2716 | reg_write(ohci, OHCI1394_FairnessControl, value & 0x3f); | |
2717 | flush_writes(ohci); | |
2718 | break; | |
2719 | ||
506f1a31 CL |
2720 | default: |
2721 | WARN_ON(1); | |
2722 | break; | |
2723 | } | |
d60d7f1d KH |
2724 | } |
2725 | ||
910e76c6 | 2726 | static void flush_iso_completions(struct iso_context *ctx) |
1aa292bb | 2727 | { |
910e76c6 CL |
2728 | ctx->base.callback.sc(&ctx->base, ctx->last_timestamp, |
2729 | ctx->header_length, ctx->header, | |
2730 | ctx->base.callback_data); | |
2731 | ctx->header_length = 0; | |
2732 | } | |
1aa292bb | 2733 | |
73864012 | 2734 | static void copy_iso_headers(struct iso_context *ctx, const u32 *dma_hdr) |
1aa292bb | 2735 | { |
73864012 | 2736 | u32 *ctx_hdr; |
1aa292bb | 2737 | |
0699a73a CL |
2738 | if (ctx->header_length + ctx->base.header_size > PAGE_SIZE) { |
2739 | if (ctx->base.drop_overflow_headers) | |
2740 | return; | |
18d62711 | 2741 | flush_iso_completions(ctx); |
0699a73a | 2742 | } |
1aa292bb | 2743 | |
73864012 | 2744 | ctx_hdr = ctx->header + ctx->header_length; |
910e76c6 | 2745 | ctx->last_timestamp = (u16)le32_to_cpu((__force __le32)dma_hdr[0]); |
1aa292bb DM |
2746 | |
2747 | /* | |
32c507f7 CL |
2748 | * The two iso header quadlets are byteswapped to little |
2749 | * endian by the controller, but we want to present them | |
2750 | * as big endian for consistency with the bus endianness. | |
1aa292bb DM |
2751 | */ |
2752 | if (ctx->base.header_size > 0) | |
73864012 | 2753 | ctx_hdr[0] = swab32(dma_hdr[1]); /* iso packet header */ |
1aa292bb | 2754 | if (ctx->base.header_size > 4) |
73864012 | 2755 | ctx_hdr[1] = swab32(dma_hdr[0]); /* timestamp */ |
1aa292bb | 2756 | if (ctx->base.header_size > 8) |
73864012 | 2757 | memcpy(&ctx_hdr[2], &dma_hdr[2], ctx->base.header_size - 8); |
1aa292bb DM |
2758 | ctx->header_length += ctx->base.header_size; |
2759 | } | |
2760 | ||
a186b4a6 JW |
2761 | static int handle_ir_packet_per_buffer(struct context *context, |
2762 | struct descriptor *d, | |
2763 | struct descriptor *last) | |
2764 | { | |
2765 | struct iso_context *ctx = | |
2766 | container_of(context, struct iso_context, context); | |
bcee893c | 2767 | struct descriptor *pd; |
a572e688 | 2768 | u32 buffer_dma; |
a186b4a6 | 2769 | |
872e330e | 2770 | for (pd = d; pd <= last; pd++) |
bcee893c DM |
2771 | if (pd->transfer_status) |
2772 | break; | |
bcee893c | 2773 | if (pd > last) |
a186b4a6 JW |
2774 | /* Descriptor(s) not done yet, stop iteration */ |
2775 | return 0; | |
2776 | ||
a572e688 CL |
2777 | while (!(d->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS))) { |
2778 | d++; | |
2779 | buffer_dma = le32_to_cpu(d->data_address); | |
2780 | dma_sync_single_range_for_cpu(context->ohci->card.device, | |
2781 | buffer_dma & PAGE_MASK, | |
2782 | buffer_dma & ~PAGE_MASK, | |
2783 | le16_to_cpu(d->req_count), | |
2784 | DMA_FROM_DEVICE); | |
2785 | } | |
2786 | ||
910e76c6 | 2787 | copy_iso_headers(ctx, (u32 *) (last + 1)); |
a186b4a6 | 2788 | |
910e76c6 CL |
2789 | if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS)) |
2790 | flush_iso_completions(ctx); | |
a186b4a6 | 2791 | |
a186b4a6 JW |
2792 | return 1; |
2793 | } | |
2794 | ||
872e330e SR |
2795 | /* d == last because each descriptor block is only a single descriptor. */ |
2796 | static int handle_ir_buffer_fill(struct context *context, | |
2797 | struct descriptor *d, | |
2798 | struct descriptor *last) | |
2799 | { | |
2800 | struct iso_context *ctx = | |
2801 | container_of(context, struct iso_context, context); | |
d1bbd209 | 2802 | unsigned int req_count, res_count, completed; |
a572e688 | 2803 | u32 buffer_dma; |
872e330e | 2804 | |
d1bbd209 | 2805 | req_count = le16_to_cpu(last->req_count); |
6aa7de05 | 2806 | res_count = le16_to_cpu(READ_ONCE(last->res_count)); |
d1bbd209 CL |
2807 | completed = req_count - res_count; |
2808 | buffer_dma = le32_to_cpu(last->data_address); | |
2809 | ||
2810 | if (completed > 0) { | |
2811 | ctx->mc_buffer_bus = buffer_dma; | |
2812 | ctx->mc_completed = completed; | |
2813 | } | |
2814 | ||
2815 | if (res_count != 0) | |
872e330e SR |
2816 | /* Descriptor(s) not done yet, stop iteration */ |
2817 | return 0; | |
2818 | ||
a572e688 CL |
2819 | dma_sync_single_range_for_cpu(context->ohci->card.device, |
2820 | buffer_dma & PAGE_MASK, | |
2821 | buffer_dma & ~PAGE_MASK, | |
d1bbd209 | 2822 | completed, DMA_FROM_DEVICE); |
a572e688 | 2823 | |
d1bbd209 | 2824 | if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS)) { |
872e330e | 2825 | ctx->base.callback.mc(&ctx->base, |
d1bbd209 | 2826 | buffer_dma + completed, |
872e330e | 2827 | ctx->base.callback_data); |
d1bbd209 CL |
2828 | ctx->mc_completed = 0; |
2829 | } | |
872e330e SR |
2830 | |
2831 | return 1; | |
2832 | } | |
2833 | ||
d1bbd209 CL |
2834 | static void flush_ir_buffer_fill(struct iso_context *ctx) |
2835 | { | |
2836 | dma_sync_single_range_for_cpu(ctx->context.ohci->card.device, | |
2837 | ctx->mc_buffer_bus & PAGE_MASK, | |
2838 | ctx->mc_buffer_bus & ~PAGE_MASK, | |
2839 | ctx->mc_completed, DMA_FROM_DEVICE); | |
2840 | ||
2841 | ctx->base.callback.mc(&ctx->base, | |
2842 | ctx->mc_buffer_bus + ctx->mc_completed, | |
2843 | ctx->base.callback_data); | |
2844 | ctx->mc_completed = 0; | |
2845 | } | |
2846 | ||
a572e688 CL |
2847 | static inline void sync_it_packet_for_cpu(struct context *context, |
2848 | struct descriptor *pd) | |
2849 | { | |
2850 | __le16 control; | |
2851 | u32 buffer_dma; | |
2852 | ||
2853 | /* only packets beginning with OUTPUT_MORE* have data buffers */ | |
2854 | if (pd->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS)) | |
2855 | return; | |
2856 | ||
2857 | /* skip over the OUTPUT_MORE_IMMEDIATE descriptor */ | |
2858 | pd += 2; | |
2859 | ||
2860 | /* | |
2861 | * If the packet has a header, the first OUTPUT_MORE/LAST descriptor's | |
2862 | * data buffer is in the context program's coherent page and must not | |
2863 | * be synced. | |
2864 | */ | |
2865 | if ((le32_to_cpu(pd->data_address) & PAGE_MASK) == | |
2866 | (context->current_bus & PAGE_MASK)) { | |
2867 | if (pd->control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS)) | |
2868 | return; | |
2869 | pd++; | |
2870 | } | |
2871 | ||
2872 | do { | |
2873 | buffer_dma = le32_to_cpu(pd->data_address); | |
2874 | dma_sync_single_range_for_cpu(context->ohci->card.device, | |
2875 | buffer_dma & PAGE_MASK, | |
2876 | buffer_dma & ~PAGE_MASK, | |
2877 | le16_to_cpu(pd->req_count), | |
2878 | DMA_TO_DEVICE); | |
2879 | control = pd->control; | |
2880 | pd++; | |
2881 | } while (!(control & cpu_to_le16(DESCRIPTOR_BRANCH_ALWAYS))); | |
2882 | } | |
2883 | ||
30200739 KH |
2884 | static int handle_it_packet(struct context *context, |
2885 | struct descriptor *d, | |
2886 | struct descriptor *last) | |
ed568912 | 2887 | { |
30200739 KH |
2888 | struct iso_context *ctx = |
2889 | container_of(context, struct iso_context, context); | |
31769cef | 2890 | struct descriptor *pd; |
73864012 | 2891 | __be32 *ctx_hdr; |
373b2edd | 2892 | |
31769cef JF |
2893 | for (pd = d; pd <= last; pd++) |
2894 | if (pd->transfer_status) | |
2895 | break; | |
2896 | if (pd > last) | |
2897 | /* Descriptor(s) not done yet, stop iteration */ | |
30200739 KH |
2898 | return 0; |
2899 | ||
a572e688 CL |
2900 | sync_it_packet_for_cpu(context, d); |
2901 | ||
0699a73a CL |
2902 | if (ctx->header_length + 4 > PAGE_SIZE) { |
2903 | if (ctx->base.drop_overflow_headers) | |
2904 | return 1; | |
18d62711 | 2905 | flush_iso_completions(ctx); |
0699a73a | 2906 | } |
910e76c6 | 2907 | |
18d62711 | 2908 | ctx_hdr = ctx->header + ctx->header_length; |
910e76c6 | 2909 | ctx->last_timestamp = le16_to_cpu(last->res_count); |
18d62711 CL |
2910 | /* Present this value as big-endian to match the receive code */ |
2911 | *ctx_hdr = cpu_to_be32((le16_to_cpu(pd->transfer_status) << 16) | | |
2912 | le16_to_cpu(pd->res_count)); | |
2913 | ctx->header_length += 4; | |
2914 | ||
910e76c6 CL |
2915 | if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS)) |
2916 | flush_iso_completions(ctx); | |
2917 | ||
30200739 | 2918 | return 1; |
ed568912 KH |
2919 | } |
2920 | ||
872e330e SR |
2921 | static void set_multichannel_mask(struct fw_ohci *ohci, u64 channels) |
2922 | { | |
2923 | u32 hi = channels >> 32, lo = channels; | |
2924 | ||
2925 | reg_write(ohci, OHCI1394_IRMultiChanMaskHiClear, ~hi); | |
2926 | reg_write(ohci, OHCI1394_IRMultiChanMaskLoClear, ~lo); | |
2927 | reg_write(ohci, OHCI1394_IRMultiChanMaskHiSet, hi); | |
2928 | reg_write(ohci, OHCI1394_IRMultiChanMaskLoSet, lo); | |
872e330e SR |
2929 | ohci->mc_channels = channels; |
2930 | } | |
2931 | ||
53dca511 | 2932 | static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, |
4817ed24 | 2933 | int type, int channel, size_t header_size) |
ed568912 KH |
2934 | { |
2935 | struct fw_ohci *ohci = fw_ohci(card); | |
872e330e SR |
2936 | struct iso_context *uninitialized_var(ctx); |
2937 | descriptor_callback_t uninitialized_var(callback); | |
2938 | u64 *uninitialized_var(channels); | |
2939 | u32 *uninitialized_var(mask), uninitialized_var(regs); | |
872e330e | 2940 | int index, ret = -EBUSY; |
ed568912 | 2941 | |
8a8c4736 | 2942 | spin_lock_irq(&ohci->lock); |
ed568912 | 2943 | |
872e330e SR |
2944 | switch (type) { |
2945 | case FW_ISO_CONTEXT_TRANSMIT: | |
2946 | mask = &ohci->it_context_mask; | |
30200739 | 2947 | callback = handle_it_packet; |
872e330e SR |
2948 | index = ffs(*mask) - 1; |
2949 | if (index >= 0) { | |
2950 | *mask &= ~(1 << index); | |
2951 | regs = OHCI1394_IsoXmitContextBase(index); | |
2952 | ctx = &ohci->it_context_list[index]; | |
2953 | } | |
2954 | break; | |
2955 | ||
2956 | case FW_ISO_CONTEXT_RECEIVE: | |
4817ed24 | 2957 | channels = &ohci->ir_context_channels; |
872e330e | 2958 | mask = &ohci->ir_context_mask; |
6498ba04 | 2959 | callback = handle_ir_packet_per_buffer; |
872e330e SR |
2960 | index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1; |
2961 | if (index >= 0) { | |
2962 | *channels &= ~(1ULL << channel); | |
2963 | *mask &= ~(1 << index); | |
2964 | regs = OHCI1394_IsoRcvContextBase(index); | |
2965 | ctx = &ohci->ir_context_list[index]; | |
2966 | } | |
2967 | break; | |
ed568912 | 2968 | |
872e330e SR |
2969 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: |
2970 | mask = &ohci->ir_context_mask; | |
2971 | callback = handle_ir_buffer_fill; | |
2972 | index = !ohci->mc_allocated ? ffs(*mask) - 1 : -1; | |
2973 | if (index >= 0) { | |
2974 | ohci->mc_allocated = true; | |
2975 | *mask &= ~(1 << index); | |
2976 | regs = OHCI1394_IsoRcvContextBase(index); | |
2977 | ctx = &ohci->ir_context_list[index]; | |
2978 | } | |
2979 | break; | |
2980 | ||
2981 | default: | |
2982 | index = -1; | |
2983 | ret = -ENOSYS; | |
4817ed24 | 2984 | } |
872e330e | 2985 | |
8a8c4736 | 2986 | spin_unlock_irq(&ohci->lock); |
ed568912 KH |
2987 | |
2988 | if (index < 0) | |
872e330e | 2989 | return ERR_PTR(ret); |
373b2edd | 2990 | |
2d826cc5 | 2991 | memset(ctx, 0, sizeof(*ctx)); |
9b32d5f3 KH |
2992 | ctx->header_length = 0; |
2993 | ctx->header = (void *) __get_free_page(GFP_KERNEL); | |
872e330e SR |
2994 | if (ctx->header == NULL) { |
2995 | ret = -ENOMEM; | |
9b32d5f3 | 2996 | goto out; |
872e330e | 2997 | } |
2dbd7d7e SR |
2998 | ret = context_init(&ctx->context, ohci, regs, callback); |
2999 | if (ret < 0) | |
9b32d5f3 | 3000 | goto out_with_header; |
ed568912 | 3001 | |
d1bbd209 | 3002 | if (type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) { |
872e330e | 3003 | set_multichannel_mask(ohci, 0); |
d1bbd209 CL |
3004 | ctx->mc_completed = 0; |
3005 | } | |
872e330e | 3006 | |
ed568912 | 3007 | return &ctx->base; |
9b32d5f3 KH |
3008 | |
3009 | out_with_header: | |
3010 | free_page((unsigned long)ctx->header); | |
3011 | out: | |
8a8c4736 | 3012 | spin_lock_irq(&ohci->lock); |
872e330e SR |
3013 | |
3014 | switch (type) { | |
3015 | case FW_ISO_CONTEXT_RECEIVE: | |
3016 | *channels |= 1ULL << channel; | |
3017 | break; | |
3018 | ||
3019 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
3020 | ohci->mc_allocated = false; | |
3021 | break; | |
3022 | } | |
9b32d5f3 | 3023 | *mask |= 1 << index; |
872e330e | 3024 | |
8a8c4736 | 3025 | spin_unlock_irq(&ohci->lock); |
9b32d5f3 | 3026 | |
2dbd7d7e | 3027 | return ERR_PTR(ret); |
ed568912 KH |
3028 | } |
3029 | ||
eb0306ea KH |
3030 | static int ohci_start_iso(struct fw_iso_context *base, |
3031 | s32 cycle, u32 sync, u32 tags) | |
ed568912 | 3032 | { |
373b2edd | 3033 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
30200739 | 3034 | struct fw_ohci *ohci = ctx->context.ohci; |
872e330e | 3035 | u32 control = IR_CONTEXT_ISOCH_HEADER, match; |
ed568912 KH |
3036 | int index; |
3037 | ||
44b74d90 CL |
3038 | /* the controller cannot start without any queued packets */ |
3039 | if (ctx->context.last->branch_address == 0) | |
3040 | return -ENODATA; | |
3041 | ||
872e330e SR |
3042 | switch (ctx->base.type) { |
3043 | case FW_ISO_CONTEXT_TRANSMIT: | |
295e3feb | 3044 | index = ctx - ohci->it_context_list; |
8a2f7d93 KH |
3045 | match = 0; |
3046 | if (cycle >= 0) | |
3047 | match = IT_CONTEXT_CYCLE_MATCH_ENABLE | | |
295e3feb | 3048 | (cycle & 0x7fff) << 16; |
21efb3cf | 3049 | |
295e3feb KH |
3050 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index); |
3051 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index); | |
8a2f7d93 | 3052 | context_run(&ctx->context, match); |
872e330e SR |
3053 | break; |
3054 | ||
3055 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
3056 | control |= IR_CONTEXT_BUFFER_FILL|IR_CONTEXT_MULTI_CHANNEL_MODE; | |
3057 | /* fall through */ | |
3058 | case FW_ISO_CONTEXT_RECEIVE: | |
295e3feb | 3059 | index = ctx - ohci->ir_context_list; |
8a2f7d93 KH |
3060 | match = (tags << 28) | (sync << 8) | ctx->base.channel; |
3061 | if (cycle >= 0) { | |
3062 | match |= (cycle & 0x07fff) << 12; | |
3063 | control |= IR_CONTEXT_CYCLE_MATCH_ENABLE; | |
3064 | } | |
ed568912 | 3065 | |
295e3feb KH |
3066 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index); |
3067 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index); | |
a77754a7 | 3068 | reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match); |
8a2f7d93 | 3069 | context_run(&ctx->context, control); |
dd23736e ML |
3070 | |
3071 | ctx->sync = sync; | |
3072 | ctx->tags = tags; | |
3073 | ||
872e330e | 3074 | break; |
295e3feb | 3075 | } |
ed568912 KH |
3076 | |
3077 | return 0; | |
3078 | } | |
3079 | ||
b8295668 KH |
3080 | static int ohci_stop_iso(struct fw_iso_context *base) |
3081 | { | |
3082 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 3083 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
b8295668 KH |
3084 | int index; |
3085 | ||
872e330e SR |
3086 | switch (ctx->base.type) { |
3087 | case FW_ISO_CONTEXT_TRANSMIT: | |
b8295668 KH |
3088 | index = ctx - ohci->it_context_list; |
3089 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index); | |
872e330e SR |
3090 | break; |
3091 | ||
3092 | case FW_ISO_CONTEXT_RECEIVE: | |
3093 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
b8295668 KH |
3094 | index = ctx - ohci->ir_context_list; |
3095 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index); | |
872e330e | 3096 | break; |
b8295668 KH |
3097 | } |
3098 | flush_writes(ohci); | |
3099 | context_stop(&ctx->context); | |
e81cbebd | 3100 | tasklet_kill(&ctx->context.tasklet); |
b8295668 KH |
3101 | |
3102 | return 0; | |
3103 | } | |
3104 | ||
ed568912 KH |
3105 | static void ohci_free_iso_context(struct fw_iso_context *base) |
3106 | { | |
3107 | struct fw_ohci *ohci = fw_ohci(base->card); | |
373b2edd | 3108 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
ed568912 KH |
3109 | unsigned long flags; |
3110 | int index; | |
3111 | ||
b8295668 KH |
3112 | ohci_stop_iso(base); |
3113 | context_release(&ctx->context); | |
9b32d5f3 | 3114 | free_page((unsigned long)ctx->header); |
b8295668 | 3115 | |
ed568912 KH |
3116 | spin_lock_irqsave(&ohci->lock, flags); |
3117 | ||
872e330e SR |
3118 | switch (base->type) { |
3119 | case FW_ISO_CONTEXT_TRANSMIT: | |
ed568912 | 3120 | index = ctx - ohci->it_context_list; |
ed568912 | 3121 | ohci->it_context_mask |= 1 << index; |
872e330e SR |
3122 | break; |
3123 | ||
3124 | case FW_ISO_CONTEXT_RECEIVE: | |
ed568912 | 3125 | index = ctx - ohci->ir_context_list; |
ed568912 | 3126 | ohci->ir_context_mask |= 1 << index; |
4817ed24 | 3127 | ohci->ir_context_channels |= 1ULL << base->channel; |
872e330e SR |
3128 | break; |
3129 | ||
3130 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
3131 | index = ctx - ohci->ir_context_list; | |
3132 | ohci->ir_context_mask |= 1 << index; | |
3133 | ohci->ir_context_channels |= ohci->mc_channels; | |
3134 | ohci->mc_channels = 0; | |
3135 | ohci->mc_allocated = false; | |
3136 | break; | |
ed568912 | 3137 | } |
ed568912 KH |
3138 | |
3139 | spin_unlock_irqrestore(&ohci->lock, flags); | |
3140 | } | |
3141 | ||
872e330e SR |
3142 | static int ohci_set_iso_channels(struct fw_iso_context *base, u64 *channels) |
3143 | { | |
3144 | struct fw_ohci *ohci = fw_ohci(base->card); | |
3145 | unsigned long flags; | |
3146 | int ret; | |
3147 | ||
3148 | switch (base->type) { | |
3149 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
3150 | ||
3151 | spin_lock_irqsave(&ohci->lock, flags); | |
3152 | ||
3153 | /* Don't allow multichannel to grab other contexts' channels. */ | |
3154 | if (~ohci->ir_context_channels & ~ohci->mc_channels & *channels) { | |
3155 | *channels = ohci->ir_context_channels; | |
3156 | ret = -EBUSY; | |
3157 | } else { | |
3158 | set_multichannel_mask(ohci, *channels); | |
3159 | ret = 0; | |
3160 | } | |
3161 | ||
3162 | spin_unlock_irqrestore(&ohci->lock, flags); | |
3163 | ||
3164 | break; | |
3165 | default: | |
3166 | ret = -EINVAL; | |
3167 | } | |
3168 | ||
3169 | return ret; | |
3170 | } | |
3171 | ||
dd23736e ML |
3172 | #ifdef CONFIG_PM |
3173 | static void ohci_resume_iso_dma(struct fw_ohci *ohci) | |
3174 | { | |
3175 | int i; | |
3176 | struct iso_context *ctx; | |
3177 | ||
3178 | for (i = 0 ; i < ohci->n_ir ; i++) { | |
3179 | ctx = &ohci->ir_context_list[i]; | |
693a50b5 | 3180 | if (ctx->context.running) |
dd23736e ML |
3181 | ohci_start_iso(&ctx->base, 0, ctx->sync, ctx->tags); |
3182 | } | |
3183 | ||
3184 | for (i = 0 ; i < ohci->n_it ; i++) { | |
3185 | ctx = &ohci->it_context_list[i]; | |
693a50b5 | 3186 | if (ctx->context.running) |
dd23736e ML |
3187 | ohci_start_iso(&ctx->base, 0, ctx->sync, ctx->tags); |
3188 | } | |
3189 | } | |
3190 | #endif | |
3191 | ||
872e330e SR |
3192 | static int queue_iso_transmit(struct iso_context *ctx, |
3193 | struct fw_iso_packet *packet, | |
3194 | struct fw_iso_buffer *buffer, | |
3195 | unsigned long payload) | |
ed568912 | 3196 | { |
30200739 | 3197 | struct descriptor *d, *last, *pd; |
ed568912 KH |
3198 | struct fw_iso_packet *p; |
3199 | __le32 *header; | |
9aad8125 | 3200 | dma_addr_t d_bus, page_bus; |
ed568912 KH |
3201 | u32 z, header_z, payload_z, irq; |
3202 | u32 payload_index, payload_end_index, next_page_index; | |
30200739 | 3203 | int page, end_page, i, length, offset; |
ed568912 | 3204 | |
ed568912 | 3205 | p = packet; |
9aad8125 | 3206 | payload_index = payload; |
ed568912 KH |
3207 | |
3208 | if (p->skip) | |
3209 | z = 1; | |
3210 | else | |
3211 | z = 2; | |
3212 | if (p->header_length > 0) | |
3213 | z++; | |
3214 | ||
3215 | /* Determine the first page the payload isn't contained in. */ | |
3216 | end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT; | |
3217 | if (p->payload_length > 0) | |
3218 | payload_z = end_page - (payload_index >> PAGE_SHIFT); | |
3219 | else | |
3220 | payload_z = 0; | |
3221 | ||
3222 | z += payload_z; | |
3223 | ||
3224 | /* Get header size in number of descriptors. */ | |
2d826cc5 | 3225 | header_z = DIV_ROUND_UP(p->header_length, sizeof(*d)); |
ed568912 | 3226 | |
30200739 KH |
3227 | d = context_get_descriptors(&ctx->context, z + header_z, &d_bus); |
3228 | if (d == NULL) | |
3229 | return -ENOMEM; | |
ed568912 KH |
3230 | |
3231 | if (!p->skip) { | |
a77754a7 | 3232 | d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE); |
ed568912 | 3233 | d[0].req_count = cpu_to_le16(8); |
7f51a100 CL |
3234 | /* |
3235 | * Link the skip address to this descriptor itself. This causes | |
3236 | * a context to skip a cycle whenever lost cycles or FIFO | |
3237 | * overruns occur, without dropping the data. The application | |
3238 | * should then decide whether this is an error condition or not. | |
3239 | * FIXME: Make the context's cycle-lost behaviour configurable? | |
3240 | */ | |
3241 | d[0].branch_address = cpu_to_le32(d_bus | z); | |
ed568912 KH |
3242 | |
3243 | header = (__le32 *) &d[1]; | |
a77754a7 KH |
3244 | header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) | |
3245 | IT_HEADER_TAG(p->tag) | | |
3246 | IT_HEADER_TCODE(TCODE_STREAM_DATA) | | |
3247 | IT_HEADER_CHANNEL(ctx->base.channel) | | |
3248 | IT_HEADER_SPEED(ctx->base.speed)); | |
ed568912 | 3249 | header[1] = |
a77754a7 | 3250 | cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length + |
ed568912 KH |
3251 | p->payload_length)); |
3252 | } | |
3253 | ||
3254 | if (p->header_length > 0) { | |
3255 | d[2].req_count = cpu_to_le16(p->header_length); | |
2d826cc5 | 3256 | d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d)); |
ed568912 KH |
3257 | memcpy(&d[z], p->header, p->header_length); |
3258 | } | |
3259 | ||
3260 | pd = d + z - payload_z; | |
3261 | payload_end_index = payload_index + p->payload_length; | |
3262 | for (i = 0; i < payload_z; i++) { | |
3263 | page = payload_index >> PAGE_SHIFT; | |
3264 | offset = payload_index & ~PAGE_MASK; | |
3265 | next_page_index = (page + 1) << PAGE_SHIFT; | |
3266 | length = | |
3267 | min(next_page_index, payload_end_index) - payload_index; | |
3268 | pd[i].req_count = cpu_to_le16(length); | |
9aad8125 KH |
3269 | |
3270 | page_bus = page_private(buffer->pages[page]); | |
3271 | pd[i].data_address = cpu_to_le32(page_bus + offset); | |
ed568912 | 3272 | |
a572e688 CL |
3273 | dma_sync_single_range_for_device(ctx->context.ohci->card.device, |
3274 | page_bus, offset, length, | |
3275 | DMA_TO_DEVICE); | |
3276 | ||
ed568912 KH |
3277 | payload_index += length; |
3278 | } | |
3279 | ||
ed568912 | 3280 | if (p->interrupt) |
a77754a7 | 3281 | irq = DESCRIPTOR_IRQ_ALWAYS; |
ed568912 | 3282 | else |
a77754a7 | 3283 | irq = DESCRIPTOR_NO_IRQ; |
ed568912 | 3284 | |
30200739 | 3285 | last = z == 2 ? d : d + z - 1; |
a77754a7 KH |
3286 | last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST | |
3287 | DESCRIPTOR_STATUS | | |
3288 | DESCRIPTOR_BRANCH_ALWAYS | | |
cbb59da7 | 3289 | irq); |
ed568912 | 3290 | |
30200739 | 3291 | context_append(&ctx->context, d, z, header_z); |
ed568912 KH |
3292 | |
3293 | return 0; | |
3294 | } | |
373b2edd | 3295 | |
872e330e SR |
3296 | static int queue_iso_packet_per_buffer(struct iso_context *ctx, |
3297 | struct fw_iso_packet *packet, | |
3298 | struct fw_iso_buffer *buffer, | |
3299 | unsigned long payload) | |
a186b4a6 | 3300 | { |
a572e688 | 3301 | struct device *device = ctx->context.ohci->card.device; |
8c0c0cc2 | 3302 | struct descriptor *d, *pd; |
a186b4a6 JW |
3303 | dma_addr_t d_bus, page_bus; |
3304 | u32 z, header_z, rest; | |
bcee893c DM |
3305 | int i, j, length; |
3306 | int page, offset, packet_count, header_size, payload_per_buffer; | |
a186b4a6 JW |
3307 | |
3308 | /* | |
1aa292bb DM |
3309 | * The OHCI controller puts the isochronous header and trailer in the |
3310 | * buffer, so we need at least 8 bytes. | |
a186b4a6 | 3311 | */ |
872e330e | 3312 | packet_count = packet->header_length / ctx->base.header_size; |
1aa292bb | 3313 | header_size = max(ctx->base.header_size, (size_t)8); |
a186b4a6 JW |
3314 | |
3315 | /* Get header size in number of descriptors. */ | |
3316 | header_z = DIV_ROUND_UP(header_size, sizeof(*d)); | |
3317 | page = payload >> PAGE_SHIFT; | |
3318 | offset = payload & ~PAGE_MASK; | |
872e330e | 3319 | payload_per_buffer = packet->payload_length / packet_count; |
a186b4a6 JW |
3320 | |
3321 | for (i = 0; i < packet_count; i++) { | |
3322 | /* d points to the header descriptor */ | |
bcee893c | 3323 | z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1; |
a186b4a6 | 3324 | d = context_get_descriptors(&ctx->context, |
bcee893c | 3325 | z + header_z, &d_bus); |
a186b4a6 JW |
3326 | if (d == NULL) |
3327 | return -ENOMEM; | |
3328 | ||
bcee893c DM |
3329 | d->control = cpu_to_le16(DESCRIPTOR_STATUS | |
3330 | DESCRIPTOR_INPUT_MORE); | |
872e330e | 3331 | if (packet->skip && i == 0) |
bcee893c | 3332 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); |
a186b4a6 JW |
3333 | d->req_count = cpu_to_le16(header_size); |
3334 | d->res_count = d->req_count; | |
bcee893c | 3335 | d->transfer_status = 0; |
a186b4a6 JW |
3336 | d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d))); |
3337 | ||
bcee893c | 3338 | rest = payload_per_buffer; |
8c0c0cc2 | 3339 | pd = d; |
bcee893c | 3340 | for (j = 1; j < z; j++) { |
8c0c0cc2 | 3341 | pd++; |
bcee893c DM |
3342 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
3343 | DESCRIPTOR_INPUT_MORE); | |
3344 | ||
3345 | if (offset + rest < PAGE_SIZE) | |
3346 | length = rest; | |
3347 | else | |
3348 | length = PAGE_SIZE - offset; | |
3349 | pd->req_count = cpu_to_le16(length); | |
3350 | pd->res_count = pd->req_count; | |
3351 | pd->transfer_status = 0; | |
3352 | ||
3353 | page_bus = page_private(buffer->pages[page]); | |
3354 | pd->data_address = cpu_to_le32(page_bus + offset); | |
3355 | ||
a572e688 CL |
3356 | dma_sync_single_range_for_device(device, page_bus, |
3357 | offset, length, | |
3358 | DMA_FROM_DEVICE); | |
3359 | ||
bcee893c DM |
3360 | offset = (offset + length) & ~PAGE_MASK; |
3361 | rest -= length; | |
3362 | if (offset == 0) | |
3363 | page++; | |
3364 | } | |
a186b4a6 JW |
3365 | pd->control = cpu_to_le16(DESCRIPTOR_STATUS | |
3366 | DESCRIPTOR_INPUT_LAST | | |
3367 | DESCRIPTOR_BRANCH_ALWAYS); | |
872e330e | 3368 | if (packet->interrupt && i == packet_count - 1) |
a186b4a6 JW |
3369 | pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); |
3370 | ||
a186b4a6 JW |
3371 | context_append(&ctx->context, d, z, header_z); |
3372 | } | |
3373 | ||
3374 | return 0; | |
3375 | } | |
3376 | ||
872e330e SR |
3377 | static int queue_iso_buffer_fill(struct iso_context *ctx, |
3378 | struct fw_iso_packet *packet, | |
3379 | struct fw_iso_buffer *buffer, | |
3380 | unsigned long payload) | |
3381 | { | |
3382 | struct descriptor *d; | |
3383 | dma_addr_t d_bus, page_bus; | |
3384 | int page, offset, rest, z, i, length; | |
3385 | ||
3386 | page = payload >> PAGE_SHIFT; | |
3387 | offset = payload & ~PAGE_MASK; | |
3388 | rest = packet->payload_length; | |
3389 | ||
3390 | /* We need one descriptor for each page in the buffer. */ | |
3391 | z = DIV_ROUND_UP(offset + rest, PAGE_SIZE); | |
3392 | ||
3393 | if (WARN_ON(offset & 3 || rest & 3 || page + z > buffer->page_count)) | |
3394 | return -EFAULT; | |
3395 | ||
3396 | for (i = 0; i < z; i++) { | |
3397 | d = context_get_descriptors(&ctx->context, 1, &d_bus); | |
3398 | if (d == NULL) | |
3399 | return -ENOMEM; | |
3400 | ||
3401 | d->control = cpu_to_le16(DESCRIPTOR_INPUT_MORE | | |
3402 | DESCRIPTOR_BRANCH_ALWAYS); | |
3403 | if (packet->skip && i == 0) | |
3404 | d->control |= cpu_to_le16(DESCRIPTOR_WAIT); | |
3405 | if (packet->interrupt && i == z - 1) | |
3406 | d->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS); | |
3407 | ||
3408 | if (offset + rest < PAGE_SIZE) | |
3409 | length = rest; | |
3410 | else | |
3411 | length = PAGE_SIZE - offset; | |
3412 | d->req_count = cpu_to_le16(length); | |
3413 | d->res_count = d->req_count; | |
3414 | d->transfer_status = 0; | |
3415 | ||
3416 | page_bus = page_private(buffer->pages[page]); | |
3417 | d->data_address = cpu_to_le32(page_bus + offset); | |
3418 | ||
a572e688 CL |
3419 | dma_sync_single_range_for_device(ctx->context.ohci->card.device, |
3420 | page_bus, offset, length, | |
3421 | DMA_FROM_DEVICE); | |
3422 | ||
872e330e SR |
3423 | rest -= length; |
3424 | offset = 0; | |
3425 | page++; | |
3426 | ||
3427 | context_append(&ctx->context, d, 1, 0); | |
3428 | } | |
3429 | ||
3430 | return 0; | |
3431 | } | |
3432 | ||
53dca511 SR |
3433 | static int ohci_queue_iso(struct fw_iso_context *base, |
3434 | struct fw_iso_packet *packet, | |
3435 | struct fw_iso_buffer *buffer, | |
3436 | unsigned long payload) | |
295e3feb | 3437 | { |
e364cf4e | 3438 | struct iso_context *ctx = container_of(base, struct iso_context, base); |
fe5ca634 | 3439 | unsigned long flags; |
872e330e | 3440 | int ret = -ENOSYS; |
e364cf4e | 3441 | |
fe5ca634 | 3442 | spin_lock_irqsave(&ctx->context.ohci->lock, flags); |
872e330e SR |
3443 | switch (base->type) { |
3444 | case FW_ISO_CONTEXT_TRANSMIT: | |
3445 | ret = queue_iso_transmit(ctx, packet, buffer, payload); | |
3446 | break; | |
3447 | case FW_ISO_CONTEXT_RECEIVE: | |
3448 | ret = queue_iso_packet_per_buffer(ctx, packet, buffer, payload); | |
3449 | break; | |
3450 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
3451 | ret = queue_iso_buffer_fill(ctx, packet, buffer, payload); | |
3452 | break; | |
3453 | } | |
fe5ca634 DM |
3454 | spin_unlock_irqrestore(&ctx->context.ohci->lock, flags); |
3455 | ||
2dbd7d7e | 3456 | return ret; |
295e3feb KH |
3457 | } |
3458 | ||
13882a82 CL |
3459 | static void ohci_flush_queue_iso(struct fw_iso_context *base) |
3460 | { | |
3461 | struct context *ctx = | |
3462 | &container_of(base, struct iso_context, base)->context; | |
3463 | ||
3464 | reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE); | |
13882a82 CL |
3465 | } |
3466 | ||
d1bbd209 CL |
3467 | static int ohci_flush_iso_completions(struct fw_iso_context *base) |
3468 | { | |
3469 | struct iso_context *ctx = container_of(base, struct iso_context, base); | |
3470 | int ret = 0; | |
3471 | ||
3472 | tasklet_disable(&ctx->context.tasklet); | |
3473 | ||
3474 | if (!test_and_set_bit_lock(0, &ctx->flushing_completions)) { | |
3475 | context_tasklet((unsigned long)&ctx->context); | |
3476 | ||
3477 | switch (base->type) { | |
3478 | case FW_ISO_CONTEXT_TRANSMIT: | |
3479 | case FW_ISO_CONTEXT_RECEIVE: | |
3480 | if (ctx->header_length != 0) | |
3481 | flush_iso_completions(ctx); | |
3482 | break; | |
3483 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
3484 | if (ctx->mc_completed != 0) | |
3485 | flush_ir_buffer_fill(ctx); | |
3486 | break; | |
3487 | default: | |
3488 | ret = -ENOSYS; | |
3489 | } | |
3490 | ||
3491 | clear_bit_unlock(0, &ctx->flushing_completions); | |
4e857c58 | 3492 | smp_mb__after_atomic(); |
d1bbd209 CL |
3493 | } |
3494 | ||
3495 | tasklet_enable(&ctx->context.tasklet); | |
3496 | ||
3497 | return ret; | |
3498 | } | |
3499 | ||
21ebcd12 | 3500 | static const struct fw_card_driver ohci_driver = { |
ed568912 | 3501 | .enable = ohci_enable, |
02d37bed | 3502 | .read_phy_reg = ohci_read_phy_reg, |
ed568912 KH |
3503 | .update_phy_reg = ohci_update_phy_reg, |
3504 | .set_config_rom = ohci_set_config_rom, | |
3505 | .send_request = ohci_send_request, | |
3506 | .send_response = ohci_send_response, | |
730c32f5 | 3507 | .cancel_packet = ohci_cancel_packet, |
ed568912 | 3508 | .enable_phys_dma = ohci_enable_phys_dma, |
0fcff4e3 SR |
3509 | .read_csr = ohci_read_csr, |
3510 | .write_csr = ohci_write_csr, | |
ed568912 KH |
3511 | |
3512 | .allocate_iso_context = ohci_allocate_iso_context, | |
3513 | .free_iso_context = ohci_free_iso_context, | |
872e330e | 3514 | .set_iso_channels = ohci_set_iso_channels, |
ed568912 | 3515 | .queue_iso = ohci_queue_iso, |
13882a82 | 3516 | .flush_queue_iso = ohci_flush_queue_iso, |
d1bbd209 | 3517 | .flush_iso_completions = ohci_flush_iso_completions, |
69cdb726 | 3518 | .start_iso = ohci_start_iso, |
b8295668 | 3519 | .stop_iso = ohci_stop_iso, |
ed568912 KH |
3520 | }; |
3521 | ||
ea8d006b | 3522 | #ifdef CONFIG_PPC_PMAC |
5da3dac8 | 3523 | static void pmac_ohci_on(struct pci_dev *dev) |
2ed0f181 | 3524 | { |
ea8d006b SR |
3525 | if (machine_is(powermac)) { |
3526 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
3527 | ||
3528 | if (ofn) { | |
3529 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); | |
3530 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
3531 | } | |
3532 | } | |
2ed0f181 SR |
3533 | } |
3534 | ||
5da3dac8 | 3535 | static void pmac_ohci_off(struct pci_dev *dev) |
2ed0f181 SR |
3536 | { |
3537 | if (machine_is(powermac)) { | |
3538 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
3539 | ||
3540 | if (ofn) { | |
3541 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
3542 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); | |
3543 | } | |
3544 | } | |
3545 | } | |
3546 | #else | |
5da3dac8 SR |
3547 | static inline void pmac_ohci_on(struct pci_dev *dev) {} |
3548 | static inline void pmac_ohci_off(struct pci_dev *dev) {} | |
ea8d006b SR |
3549 | #endif /* CONFIG_PPC_PMAC */ |
3550 | ||
03f94c0f | 3551 | static int pci_probe(struct pci_dev *dev, |
53dca511 | 3552 | const struct pci_device_id *ent) |
2ed0f181 SR |
3553 | { |
3554 | struct fw_ohci *ohci; | |
aa0170ff | 3555 | u32 bus_options, max_receive, link_speed, version; |
2ed0f181 | 3556 | u64 guid; |
dd23736e | 3557 | int i, err; |
2ed0f181 SR |
3558 | size_t size; |
3559 | ||
7f7e3711 SR |
3560 | if (dev->vendor == PCI_VENDOR_ID_PINNACLE_SYSTEMS) { |
3561 | dev_err(&dev->dev, "Pinnacle MovieBoard is not yet supported\n"); | |
3562 | return -ENOSYS; | |
3563 | } | |
3564 | ||
2d826cc5 | 3565 | ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); |
ed568912 | 3566 | if (ohci == NULL) { |
7007a076 SR |
3567 | err = -ENOMEM; |
3568 | goto fail; | |
ed568912 KH |
3569 | } |
3570 | ||
3571 | fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev); | |
3572 | ||
5da3dac8 | 3573 | pmac_ohci_on(dev); |
130d5496 | 3574 | |
d79406dd KH |
3575 | err = pci_enable_device(dev); |
3576 | if (err) { | |
64d21720 | 3577 | dev_err(&dev->dev, "failed to enable OHCI hardware\n"); |
bd7dee63 | 3578 | goto fail_free; |
ed568912 KH |
3579 | } |
3580 | ||
3581 | pci_set_master(dev); | |
3582 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
3583 | pci_set_drvdata(dev, ohci); | |
3584 | ||
3585 | spin_lock_init(&ohci->lock); | |
02d37bed | 3586 | mutex_init(&ohci->phy_reg_mutex); |
ed568912 | 3587 | |
2d7a36e2 | 3588 | INIT_WORK(&ohci->bus_reset_work, bus_reset_work); |
ed568912 | 3589 | |
7baab9ac CL |
3590 | if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM) || |
3591 | pci_resource_len(dev, 0) < OHCI1394_REGISTER_SIZE) { | |
de97cb64 | 3592 | ohci_err(ohci, "invalid MMIO resource\n"); |
7baab9ac CL |
3593 | err = -ENXIO; |
3594 | goto fail_disable; | |
3595 | } | |
3596 | ||
d79406dd KH |
3597 | err = pci_request_region(dev, 0, ohci_driver_name); |
3598 | if (err) { | |
de97cb64 | 3599 | ohci_err(ohci, "MMIO resource unavailable\n"); |
d79406dd | 3600 | goto fail_disable; |
ed568912 KH |
3601 | } |
3602 | ||
3603 | ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE); | |
3604 | if (ohci->registers == NULL) { | |
de97cb64 | 3605 | ohci_err(ohci, "failed to remap registers\n"); |
d79406dd KH |
3606 | err = -ENXIO; |
3607 | goto fail_iomem; | |
ed568912 KH |
3608 | } |
3609 | ||
4a635593 | 3610 | for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++) |
9993e0fe SR |
3611 | if ((ohci_quirks[i].vendor == dev->vendor) && |
3612 | (ohci_quirks[i].device == (unsigned short)PCI_ANY_ID || | |
3613 | ohci_quirks[i].device == dev->device) && | |
3614 | (ohci_quirks[i].revision == (unsigned short)PCI_ANY_ID || | |
3615 | ohci_quirks[i].revision >= dev->revision)) { | |
4a635593 SR |
3616 | ohci->quirks = ohci_quirks[i].flags; |
3617 | break; | |
3618 | } | |
3e9cc2f3 SR |
3619 | if (param_quirks) |
3620 | ohci->quirks = param_quirks; | |
b677532b | 3621 | |
ec766a79 CL |
3622 | /* |
3623 | * Because dma_alloc_coherent() allocates at least one page, | |
3624 | * we save space by using a common buffer for the AR request/ | |
3625 | * response descriptors and the self IDs buffer. | |
3626 | */ | |
3627 | BUILD_BUG_ON(AR_BUFFERS * sizeof(struct descriptor) > PAGE_SIZE/4); | |
3628 | BUILD_BUG_ON(SELF_ID_BUF_SIZE > PAGE_SIZE/2); | |
3629 | ohci->misc_buffer = dma_alloc_coherent(ohci->card.device, | |
3630 | PAGE_SIZE, | |
3631 | &ohci->misc_buffer_bus, | |
3632 | GFP_KERNEL); | |
3633 | if (!ohci->misc_buffer) { | |
3634 | err = -ENOMEM; | |
3635 | goto fail_iounmap; | |
3636 | } | |
3637 | ||
3638 | err = ar_context_init(&ohci->ar_request_ctx, ohci, 0, | |
7a39d8b8 CL |
3639 | OHCI1394_AsReqRcvContextControlSet); |
3640 | if (err < 0) | |
ec766a79 | 3641 | goto fail_misc_buf; |
ed568912 | 3642 | |
ec766a79 | 3643 | err = ar_context_init(&ohci->ar_response_ctx, ohci, PAGE_SIZE/4, |
7a39d8b8 CL |
3644 | OHCI1394_AsRspRcvContextControlSet); |
3645 | if (err < 0) | |
3646 | goto fail_arreq_ctx; | |
ed568912 | 3647 | |
c088ab30 CL |
3648 | err = context_init(&ohci->at_request_ctx, ohci, |
3649 | OHCI1394_AsReqTrContextControlSet, handle_at_packet); | |
3650 | if (err < 0) | |
3651 | goto fail_arrsp_ctx; | |
ed568912 | 3652 | |
c088ab30 CL |
3653 | err = context_init(&ohci->at_response_ctx, ohci, |
3654 | OHCI1394_AsRspTrContextControlSet, handle_at_packet); | |
3655 | if (err < 0) | |
3656 | goto fail_atreq_ctx; | |
ed568912 | 3657 | |
ed568912 | 3658 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0); |
4802f16d | 3659 | ohci->ir_context_channels = ~0ULL; |
f117a3e3 | 3660 | ohci->ir_context_support = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet); |
ed568912 | 3661 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0); |
f117a3e3 | 3662 | ohci->ir_context_mask = ohci->ir_context_support; |
dd23736e ML |
3663 | ohci->n_ir = hweight32(ohci->ir_context_mask); |
3664 | size = sizeof(struct iso_context) * ohci->n_ir; | |
4802f16d | 3665 | ohci->ir_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
3666 | |
3667 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0); | |
f117a3e3 | 3668 | ohci->it_context_support = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet); |
100ceb66 SR |
3669 | /* JMicron JMB38x often shows 0 at first read, just ignore it */ |
3670 | if (!ohci->it_context_support) { | |
3671 | ohci_notice(ohci, "overriding IsoXmitIntMask\n"); | |
3672 | ohci->it_context_support = 0xf; | |
3673 | } | |
ed568912 | 3674 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0); |
f117a3e3 | 3675 | ohci->it_context_mask = ohci->it_context_support; |
dd23736e ML |
3676 | ohci->n_it = hweight32(ohci->it_context_mask); |
3677 | size = sizeof(struct iso_context) * ohci->n_it; | |
4802f16d | 3678 | ohci->it_context_list = kzalloc(size, GFP_KERNEL); |
ed568912 KH |
3679 | |
3680 | if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) { | |
d79406dd | 3681 | err = -ENOMEM; |
7007a076 | 3682 | goto fail_contexts; |
ed568912 KH |
3683 | } |
3684 | ||
af53122a | 3685 | ohci->self_id = ohci->misc_buffer + PAGE_SIZE/2; |
ec766a79 | 3686 | ohci->self_id_bus = ohci->misc_buffer_bus + PAGE_SIZE/2; |
ed568912 | 3687 | |
ed568912 KH |
3688 | bus_options = reg_read(ohci, OHCI1394_BusOptions); |
3689 | max_receive = (bus_options >> 12) & 0xf; | |
3690 | link_speed = bus_options & 0x7; | |
3691 | guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) | | |
3692 | reg_read(ohci, OHCI1394_GUIDLo); | |
3693 | ||
247fd50b PH |
3694 | if (!(ohci->quirks & QUIRK_NO_MSI)) |
3695 | pci_enable_msi(dev); | |
3696 | if (request_irq(dev->irq, irq_handler, | |
3697 | pci_dev_msi_enabled(dev) ? 0 : IRQF_SHARED, | |
3698 | ohci_driver_name, ohci)) { | |
de97cb64 | 3699 | ohci_err(ohci, "failed to allocate interrupt %d\n", dev->irq); |
247fd50b PH |
3700 | err = -EIO; |
3701 | goto fail_msi; | |
3702 | } | |
3703 | ||
d79406dd | 3704 | err = fw_card_add(&ohci->card, max_receive, link_speed, guid); |
e1eff7a3 | 3705 | if (err) |
247fd50b | 3706 | goto fail_irq; |
ed568912 | 3707 | |
6fdb2ee2 | 3708 | version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff; |
de97cb64 PH |
3709 | ohci_notice(ohci, |
3710 | "added OHCI v%x.%x device as card %d, " | |
fcd46b34 | 3711 | "%d IR + %d IT contexts, quirks 0x%x%s\n", |
de97cb64 | 3712 | version >> 16, version & 0xff, ohci->card.index, |
fcd46b34 SR |
3713 | ohci->n_ir, ohci->n_it, ohci->quirks, |
3714 | reg_read(ohci, OHCI1394_PhyUpperBound) ? | |
2fe2023a | 3715 | ", physUB" : ""); |
e1eff7a3 | 3716 | |
ed568912 | 3717 | return 0; |
d79406dd | 3718 | |
247fd50b PH |
3719 | fail_irq: |
3720 | free_irq(dev->irq, ohci); | |
3721 | fail_msi: | |
3722 | pci_disable_msi(dev); | |
7007a076 | 3723 | fail_contexts: |
d79406dd | 3724 | kfree(ohci->ir_context_list); |
7007a076 SR |
3725 | kfree(ohci->it_context_list); |
3726 | context_release(&ohci->at_response_ctx); | |
c088ab30 | 3727 | fail_atreq_ctx: |
7007a076 | 3728 | context_release(&ohci->at_request_ctx); |
c088ab30 | 3729 | fail_arrsp_ctx: |
7007a076 | 3730 | ar_context_release(&ohci->ar_response_ctx); |
7a39d8b8 | 3731 | fail_arreq_ctx: |
7007a076 | 3732 | ar_context_release(&ohci->ar_request_ctx); |
ec766a79 CL |
3733 | fail_misc_buf: |
3734 | dma_free_coherent(ohci->card.device, PAGE_SIZE, | |
3735 | ohci->misc_buffer, ohci->misc_buffer_bus); | |
7a39d8b8 | 3736 | fail_iounmap: |
d79406dd KH |
3737 | pci_iounmap(dev, ohci->registers); |
3738 | fail_iomem: | |
3739 | pci_release_region(dev, 0); | |
3740 | fail_disable: | |
3741 | pci_disable_device(dev); | |
bd7dee63 | 3742 | fail_free: |
d838d2c0 | 3743 | kfree(ohci); |
5da3dac8 | 3744 | pmac_ohci_off(dev); |
7007a076 | 3745 | fail: |
d79406dd | 3746 | return err; |
ed568912 KH |
3747 | } |
3748 | ||
3749 | static void pci_remove(struct pci_dev *dev) | |
3750 | { | |
8db49149 | 3751 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
ed568912 | 3752 | |
8db49149 PH |
3753 | /* |
3754 | * If the removal is happening from the suspend state, LPS won't be | |
3755 | * enabled and host registers (eg., IntMaskClear) won't be accessible. | |
3756 | */ | |
3757 | if (reg_read(ohci, OHCI1394_HCControlSet) & OHCI1394_HCControl_LPS) { | |
3758 | reg_write(ohci, OHCI1394_IntMaskClear, ~0); | |
3759 | flush_writes(ohci); | |
3760 | } | |
2d7a36e2 | 3761 | cancel_work_sync(&ohci->bus_reset_work); |
ed568912 KH |
3762 | fw_core_remove_card(&ohci->card); |
3763 | ||
c781c06d KH |
3764 | /* |
3765 | * FIXME: Fail all pending packets here, now that the upper | |
3766 | * layers can't queue any more. | |
3767 | */ | |
ed568912 KH |
3768 | |
3769 | software_reset(ohci); | |
3770 | free_irq(dev->irq, ohci); | |
a55709ba JF |
3771 | |
3772 | if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom) | |
3773 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
3774 | ohci->next_config_rom, ohci->next_config_rom_bus); | |
3775 | if (ohci->config_rom) | |
3776 | dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, | |
3777 | ohci->config_rom, ohci->config_rom_bus); | |
a55709ba JF |
3778 | ar_context_release(&ohci->ar_request_ctx); |
3779 | ar_context_release(&ohci->ar_response_ctx); | |
ec766a79 CL |
3780 | dma_free_coherent(ohci->card.device, PAGE_SIZE, |
3781 | ohci->misc_buffer, ohci->misc_buffer_bus); | |
a55709ba JF |
3782 | context_release(&ohci->at_request_ctx); |
3783 | context_release(&ohci->at_response_ctx); | |
d79406dd KH |
3784 | kfree(ohci->it_context_list); |
3785 | kfree(ohci->ir_context_list); | |
262444ee | 3786 | pci_disable_msi(dev); |
d79406dd KH |
3787 | pci_iounmap(dev, ohci->registers); |
3788 | pci_release_region(dev, 0); | |
3789 | pci_disable_device(dev); | |
d838d2c0 | 3790 | kfree(ohci); |
5da3dac8 | 3791 | pmac_ohci_off(dev); |
ea8d006b | 3792 | |
64d21720 | 3793 | dev_notice(&dev->dev, "removed fw-ohci device\n"); |
ed568912 KH |
3794 | } |
3795 | ||
2aef469a | 3796 | #ifdef CONFIG_PM |
2ed0f181 | 3797 | static int pci_suspend(struct pci_dev *dev, pm_message_t state) |
2aef469a | 3798 | { |
2ed0f181 | 3799 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
3800 | int err; |
3801 | ||
3802 | software_reset(ohci); | |
2ed0f181 | 3803 | err = pci_save_state(dev); |
2aef469a | 3804 | if (err) { |
de97cb64 | 3805 | ohci_err(ohci, "pci_save_state failed\n"); |
2aef469a KH |
3806 | return err; |
3807 | } | |
2ed0f181 | 3808 | err = pci_set_power_state(dev, pci_choose_state(dev, state)); |
55111428 | 3809 | if (err) |
de97cb64 | 3810 | ohci_err(ohci, "pci_set_power_state failed with %d\n", err); |
5da3dac8 | 3811 | pmac_ohci_off(dev); |
ea8d006b | 3812 | |
2aef469a KH |
3813 | return 0; |
3814 | } | |
3815 | ||
2ed0f181 | 3816 | static int pci_resume(struct pci_dev *dev) |
2aef469a | 3817 | { |
2ed0f181 | 3818 | struct fw_ohci *ohci = pci_get_drvdata(dev); |
2aef469a KH |
3819 | int err; |
3820 | ||
5da3dac8 | 3821 | pmac_ohci_on(dev); |
2ed0f181 SR |
3822 | pci_set_power_state(dev, PCI_D0); |
3823 | pci_restore_state(dev); | |
3824 | err = pci_enable_device(dev); | |
2aef469a | 3825 | if (err) { |
de97cb64 | 3826 | ohci_err(ohci, "pci_enable_device failed\n"); |
2aef469a KH |
3827 | return err; |
3828 | } | |
3829 | ||
8662b6b0 ML |
3830 | /* Some systems don't setup GUID register on resume from ram */ |
3831 | if (!reg_read(ohci, OHCI1394_GUIDLo) && | |
3832 | !reg_read(ohci, OHCI1394_GUIDHi)) { | |
3833 | reg_write(ohci, OHCI1394_GUIDLo, (u32)ohci->card.guid); | |
3834 | reg_write(ohci, OHCI1394_GUIDHi, (u32)(ohci->card.guid >> 32)); | |
3835 | } | |
3836 | ||
dd23736e | 3837 | err = ohci_enable(&ohci->card, NULL, 0); |
dd23736e ML |
3838 | if (err) |
3839 | return err; | |
3840 | ||
3841 | ohci_resume_iso_dma(ohci); | |
693a50b5 | 3842 | |
dd23736e | 3843 | return 0; |
2aef469a KH |
3844 | } |
3845 | #endif | |
3846 | ||
a67483d2 | 3847 | static const struct pci_device_id pci_table[] = { |
ed568912 KH |
3848 | { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) }, |
3849 | { } | |
3850 | }; | |
3851 | ||
3852 | MODULE_DEVICE_TABLE(pci, pci_table); | |
3853 | ||
3854 | static struct pci_driver fw_ohci_pci_driver = { | |
3855 | .name = ohci_driver_name, | |
3856 | .id_table = pci_table, | |
3857 | .probe = pci_probe, | |
3858 | .remove = pci_remove, | |
2aef469a KH |
3859 | #ifdef CONFIG_PM |
3860 | .resume = pci_resume, | |
3861 | .suspend = pci_suspend, | |
3862 | #endif | |
ed568912 KH |
3863 | }; |
3864 | ||
7a723c6e SG |
3865 | static int __init fw_ohci_init(void) |
3866 | { | |
db9ae8fe SG |
3867 | selfid_workqueue = alloc_workqueue(KBUILD_MODNAME, WQ_MEM_RECLAIM, 0); |
3868 | if (!selfid_workqueue) | |
3869 | return -ENOMEM; | |
3870 | ||
7a723c6e SG |
3871 | return pci_register_driver(&fw_ohci_pci_driver); |
3872 | } | |
3873 | ||
3874 | static void __exit fw_ohci_cleanup(void) | |
3875 | { | |
3876 | pci_unregister_driver(&fw_ohci_pci_driver); | |
db9ae8fe | 3877 | destroy_workqueue(selfid_workqueue); |
7a723c6e SG |
3878 | } |
3879 | ||
3880 | module_init(fw_ohci_init); | |
3881 | module_exit(fw_ohci_cleanup); | |
fe2af11c | 3882 | |
ed568912 KH |
3883 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
3884 | MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers"); | |
3885 | MODULE_LICENSE("GPL"); | |
3886 | ||
1e4c7b0d | 3887 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1e4c7b0d | 3888 | MODULE_ALIAS("ohci1394"); |