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1da177e4 LT |
1 | /* |
2 | * ohci1394.c - driver for OHCI 1394 boards | |
3 | * Copyright (C)1999,2000 Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au> | |
4 | * Gord Peters <GordPeters@smarttech.com> | |
5 | * 2001 Ben Collins <bcollins@debian.org> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software Foundation, | |
19 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Things known to be working: | |
24 | * . Async Request Transmit | |
25 | * . Async Response Receive | |
26 | * . Async Request Receive | |
27 | * . Async Response Transmit | |
28 | * . Iso Receive | |
29 | * . DMA mmap for iso receive | |
30 | * . Config ROM generation | |
31 | * | |
32 | * Things implemented, but still in test phase: | |
33 | * . Iso Transmit | |
34 | * . Async Stream Packets Transmit (Receive done via Iso interface) | |
35 | * | |
36 | * Things not implemented: | |
37 | * . DMA error recovery | |
38 | * | |
39 | * Known bugs: | |
40 | * . devctl BUS_RESET arg confusion (reset type or root holdoff?) | |
41 | * added LONG_RESET_ROOT and SHORT_RESET_ROOT for root holdoff --kk | |
42 | */ | |
43 | ||
44 | /* | |
45 | * Acknowledgments: | |
46 | * | |
47 | * Adam J Richter <adam@yggdrasil.com> | |
48 | * . Use of pci_class to find device | |
49 | * | |
50 | * Emilie Chung <emilie.chung@axis.com> | |
51 | * . Tip on Async Request Filter | |
52 | * | |
53 | * Pascal Drolet <pascal.drolet@informission.ca> | |
54 | * . Various tips for optimization and functionnalities | |
55 | * | |
56 | * Robert Ficklin <rficklin@westengineering.com> | |
57 | * . Loop in irq_handler | |
58 | * | |
59 | * James Goodwin <jamesg@Filanet.com> | |
60 | * . Various tips on initialization, self-id reception, etc. | |
61 | * | |
62 | * Albrecht Dress <ad@mpifr-bonn.mpg.de> | |
63 | * . Apple PowerBook detection | |
64 | * | |
65 | * Daniel Kobras <daniel.kobras@student.uni-tuebingen.de> | |
66 | * . Reset the board properly before leaving + misc cleanups | |
67 | * | |
68 | * Leon van Stuivenberg <leonvs@iae.nl> | |
69 | * . Bug fixes | |
70 | * | |
71 | * Ben Collins <bcollins@debian.org> | |
72 | * . Working big-endian support | |
73 | * . Updated to 2.4.x module scheme (PCI aswell) | |
74 | * . Config ROM generation | |
75 | * | |
76 | * Manfred Weihs <weihs@ict.tuwien.ac.at> | |
77 | * . Reworked code for initiating bus resets | |
78 | * (long, short, with or without hold-off) | |
79 | * | |
80 | * Nandu Santhi <contactnandu@users.sourceforge.net> | |
81 | * . Added support for nVidia nForce2 onboard Firewire chipset | |
82 | * | |
83 | */ | |
84 | ||
1da177e4 LT |
85 | #include <linux/kernel.h> |
86 | #include <linux/list.h> | |
87 | #include <linux/slab.h> | |
88 | #include <linux/interrupt.h> | |
89 | #include <linux/wait.h> | |
90 | #include <linux/errno.h> | |
91 | #include <linux/module.h> | |
92 | #include <linux/moduleparam.h> | |
93 | #include <linux/pci.h> | |
94 | #include <linux/fs.h> | |
95 | #include <linux/poll.h> | |
96 | #include <asm/byteorder.h> | |
97 | #include <asm/atomic.h> | |
98 | #include <asm/uaccess.h> | |
99 | #include <linux/delay.h> | |
100 | #include <linux/spinlock.h> | |
101 | ||
102 | #include <asm/pgtable.h> | |
103 | #include <asm/page.h> | |
104 | #include <asm/irq.h> | |
1da177e4 LT |
105 | #include <linux/types.h> |
106 | #include <linux/vmalloc.h> | |
107 | #include <linux/init.h> | |
108 | ||
109 | #ifdef CONFIG_PPC_PMAC | |
110 | #include <asm/machdep.h> | |
111 | #include <asm/pmac_feature.h> | |
112 | #include <asm/prom.h> | |
113 | #include <asm/pci-bridge.h> | |
114 | #endif | |
115 | ||
116 | #include "csr1212.h" | |
117 | #include "ieee1394.h" | |
118 | #include "ieee1394_types.h" | |
119 | #include "hosts.h" | |
120 | #include "dma.h" | |
121 | #include "iso.h" | |
122 | #include "ieee1394_core.h" | |
123 | #include "highlevel.h" | |
124 | #include "ohci1394.h" | |
125 | ||
126 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
127 | #define OHCI1394_DEBUG | |
128 | #endif | |
129 | ||
130 | #ifdef DBGMSG | |
131 | #undef DBGMSG | |
132 | #endif | |
133 | ||
134 | #ifdef OHCI1394_DEBUG | |
135 | #define DBGMSG(fmt, args...) \ | |
136 | printk(KERN_INFO "%s: fw-host%d: " fmt "\n" , OHCI1394_DRIVER_NAME, ohci->host->id , ## args) | |
137 | #else | |
611aa19f | 138 | #define DBGMSG(fmt, args...) do {} while (0) |
1da177e4 LT |
139 | #endif |
140 | ||
1da177e4 LT |
141 | /* print general (card independent) information */ |
142 | #define PRINT_G(level, fmt, args...) \ | |
143 | printk(level "%s: " fmt "\n" , OHCI1394_DRIVER_NAME , ## args) | |
144 | ||
145 | /* print card specific information */ | |
146 | #define PRINT(level, fmt, args...) \ | |
147 | printk(level "%s: fw-host%d: " fmt "\n" , OHCI1394_DRIVER_NAME, ohci->host->id , ## args) | |
148 | ||
1da177e4 LT |
149 | /* Module Parameters */ |
150 | static int phys_dma = 1; | |
fa9b7399 | 151 | module_param(phys_dma, int, 0444); |
c4e2e02b | 152 | MODULE_PARM_DESC(phys_dma, "Enable physical DMA (default = 1)."); |
1da177e4 LT |
153 | |
154 | static void dma_trm_tasklet(unsigned long data); | |
155 | static void dma_trm_reset(struct dma_trm_ctx *d); | |
156 | ||
157 | static int alloc_dma_rcv_ctx(struct ti_ohci *ohci, struct dma_rcv_ctx *d, | |
158 | enum context_type type, int ctx, int num_desc, | |
159 | int buf_size, int split_buf_size, int context_base); | |
1da177e4 LT |
160 | static void free_dma_rcv_ctx(struct dma_rcv_ctx *d); |
161 | ||
162 | static int alloc_dma_trm_ctx(struct ti_ohci *ohci, struct dma_trm_ctx *d, | |
163 | enum context_type type, int ctx, int num_desc, | |
164 | int context_base); | |
165 | ||
166 | static void ohci1394_pci_remove(struct pci_dev *pdev); | |
167 | ||
168 | #ifndef __LITTLE_ENDIAN | |
c5a69d57 | 169 | static const size_t hdr_sizes[] = { |
1da177e4 LT |
170 | 3, /* TCODE_WRITEQ */ |
171 | 4, /* TCODE_WRITEB */ | |
172 | 3, /* TCODE_WRITE_RESPONSE */ | |
9531f13a | 173 | 0, /* reserved */ |
1da177e4 LT |
174 | 3, /* TCODE_READQ */ |
175 | 4, /* TCODE_READB */ | |
176 | 3, /* TCODE_READQ_RESPONSE */ | |
177 | 4, /* TCODE_READB_RESPONSE */ | |
9531f13a | 178 | 1, /* TCODE_CYCLE_START */ |
1da177e4 LT |
179 | 4, /* TCODE_LOCK_REQUEST */ |
180 | 2, /* TCODE_ISO_DATA */ | |
181 | 4, /* TCODE_LOCK_RESPONSE */ | |
9531f13a | 182 | /* rest is reserved or link-internal */ |
1da177e4 LT |
183 | }; |
184 | ||
9531f13a | 185 | static inline void header_le32_to_cpu(quadlet_t *data, unsigned char tcode) |
1da177e4 | 186 | { |
9531f13a | 187 | size_t size; |
1da177e4 | 188 | |
9531f13a | 189 | if (unlikely(tcode >= ARRAY_SIZE(hdr_sizes))) |
1da177e4 LT |
190 | return; |
191 | ||
9531f13a | 192 | size = hdr_sizes[tcode]; |
1da177e4 | 193 | while (size--) |
9531f13a | 194 | data[size] = le32_to_cpu(data[size]); |
1da177e4 LT |
195 | } |
196 | #else | |
9531f13a | 197 | #define header_le32_to_cpu(w,x) do {} while (0) |
1da177e4 LT |
198 | #endif /* !LITTLE_ENDIAN */ |
199 | ||
200 | /*********************************** | |
201 | * IEEE-1394 functionality section * | |
202 | ***********************************/ | |
203 | ||
204 | static u8 get_phy_reg(struct ti_ohci *ohci, u8 addr) | |
205 | { | |
206 | int i; | |
207 | unsigned long flags; | |
208 | quadlet_t r; | |
209 | ||
210 | spin_lock_irqsave (&ohci->phy_reg_lock, flags); | |
211 | ||
212 | reg_write(ohci, OHCI1394_PhyControl, (addr << 8) | 0x00008000); | |
213 | ||
214 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
215 | if (reg_read(ohci, OHCI1394_PhyControl) & 0x80000000) | |
216 | break; | |
217 | ||
218 | mdelay(1); | |
219 | } | |
220 | ||
221 | r = reg_read(ohci, OHCI1394_PhyControl); | |
222 | ||
223 | if (i >= OHCI_LOOP_COUNT) | |
224 | PRINT (KERN_ERR, "Get PHY Reg timeout [0x%08x/0x%08x/%d]", | |
225 | r, r & 0x80000000, i); | |
226 | ||
227 | spin_unlock_irqrestore (&ohci->phy_reg_lock, flags); | |
228 | ||
229 | return (r & 0x00ff0000) >> 16; | |
230 | } | |
231 | ||
232 | static void set_phy_reg(struct ti_ohci *ohci, u8 addr, u8 data) | |
233 | { | |
234 | int i; | |
235 | unsigned long flags; | |
236 | u32 r = 0; | |
237 | ||
238 | spin_lock_irqsave (&ohci->phy_reg_lock, flags); | |
239 | ||
240 | reg_write(ohci, OHCI1394_PhyControl, (addr << 8) | data | 0x00004000); | |
241 | ||
242 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
243 | r = reg_read(ohci, OHCI1394_PhyControl); | |
244 | if (!(r & 0x00004000)) | |
245 | break; | |
246 | ||
247 | mdelay(1); | |
248 | } | |
249 | ||
250 | if (i == OHCI_LOOP_COUNT) | |
251 | PRINT (KERN_ERR, "Set PHY Reg timeout [0x%08x/0x%08x/%d]", | |
252 | r, r & 0x00004000, i); | |
253 | ||
254 | spin_unlock_irqrestore (&ohci->phy_reg_lock, flags); | |
255 | ||
256 | return; | |
257 | } | |
258 | ||
259 | /* Or's our value into the current value */ | |
260 | static void set_phy_reg_mask(struct ti_ohci *ohci, u8 addr, u8 data) | |
261 | { | |
262 | u8 old; | |
263 | ||
264 | old = get_phy_reg (ohci, addr); | |
265 | old |= data; | |
266 | set_phy_reg (ohci, addr, old); | |
267 | ||
268 | return; | |
269 | } | |
270 | ||
271 | static void handle_selfid(struct ti_ohci *ohci, struct hpsb_host *host, | |
272 | int phyid, int isroot) | |
273 | { | |
274 | quadlet_t *q = ohci->selfid_buf_cpu; | |
275 | quadlet_t self_id_count=reg_read(ohci, OHCI1394_SelfIDCount); | |
276 | size_t size; | |
277 | quadlet_t q0, q1; | |
278 | ||
279 | /* Check status of self-id reception */ | |
280 | ||
281 | if (ohci->selfid_swap) | |
282 | q0 = le32_to_cpu(q[0]); | |
283 | else | |
284 | q0 = q[0]; | |
285 | ||
286 | if ((self_id_count & 0x80000000) || | |
287 | ((self_id_count & 0x00FF0000) != (q0 & 0x00FF0000))) { | |
288 | PRINT(KERN_ERR, | |
289 | "Error in reception of SelfID packets [0x%08x/0x%08x] (count: %d)", | |
290 | self_id_count, q0, ohci->self_id_errors); | |
291 | ||
292 | /* Tip by James Goodwin <jamesg@Filanet.com>: | |
293 | * We had an error, generate another bus reset in response. */ | |
294 | if (ohci->self_id_errors<OHCI1394_MAX_SELF_ID_ERRORS) { | |
295 | set_phy_reg_mask (ohci, 1, 0x40); | |
296 | ohci->self_id_errors++; | |
297 | } else { | |
298 | PRINT(KERN_ERR, | |
299 | "Too many errors on SelfID error reception, giving up!"); | |
300 | } | |
301 | return; | |
302 | } | |
303 | ||
304 | /* SelfID Ok, reset error counter. */ | |
305 | ohci->self_id_errors = 0; | |
306 | ||
307 | size = ((self_id_count & 0x00001FFC) >> 2) - 1; | |
308 | q++; | |
309 | ||
310 | while (size > 0) { | |
311 | if (ohci->selfid_swap) { | |
312 | q0 = le32_to_cpu(q[0]); | |
313 | q1 = le32_to_cpu(q[1]); | |
314 | } else { | |
315 | q0 = q[0]; | |
316 | q1 = q[1]; | |
317 | } | |
318 | ||
319 | if (q0 == ~q1) { | |
320 | DBGMSG ("SelfID packet 0x%x received", q0); | |
321 | hpsb_selfid_received(host, cpu_to_be32(q0)); | |
322 | if (((q0 & 0x3f000000) >> 24) == phyid) | |
323 | DBGMSG ("SelfID for this node is 0x%08x", q0); | |
324 | } else { | |
325 | PRINT(KERN_ERR, | |
326 | "SelfID is inconsistent [0x%08x/0x%08x]", q0, q1); | |
327 | } | |
328 | q += 2; | |
329 | size -= 2; | |
330 | } | |
331 | ||
332 | DBGMSG("SelfID complete"); | |
333 | ||
334 | return; | |
335 | } | |
336 | ||
337 | static void ohci_soft_reset(struct ti_ohci *ohci) { | |
338 | int i; | |
339 | ||
340 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset); | |
341 | ||
342 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
343 | if (!(reg_read(ohci, OHCI1394_HCControlSet) & OHCI1394_HCControl_softReset)) | |
344 | break; | |
345 | mdelay(1); | |
346 | } | |
347 | DBGMSG ("Soft reset finished"); | |
348 | } | |
349 | ||
350 | ||
351 | /* Generate the dma receive prgs and start the context */ | |
352 | static void initialize_dma_rcv_ctx(struct dma_rcv_ctx *d, int generate_irq) | |
353 | { | |
354 | struct ti_ohci *ohci = (struct ti_ohci*)(d->ohci); | |
355 | int i; | |
356 | ||
357 | ohci1394_stop_context(ohci, d->ctrlClear, NULL); | |
358 | ||
359 | for (i=0; i<d->num_desc; i++) { | |
360 | u32 c; | |
361 | ||
362 | c = DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE | DMA_CTL_BRANCH; | |
363 | if (generate_irq) | |
364 | c |= DMA_CTL_IRQ; | |
365 | ||
366 | d->prg_cpu[i]->control = cpu_to_le32(c | d->buf_size); | |
367 | ||
368 | /* End of descriptor list? */ | |
369 | if (i + 1 < d->num_desc) { | |
370 | d->prg_cpu[i]->branchAddress = | |
371 | cpu_to_le32((d->prg_bus[i+1] & 0xfffffff0) | 0x1); | |
372 | } else { | |
373 | d->prg_cpu[i]->branchAddress = | |
374 | cpu_to_le32((d->prg_bus[0] & 0xfffffff0)); | |
375 | } | |
376 | ||
377 | d->prg_cpu[i]->address = cpu_to_le32(d->buf_bus[i]); | |
378 | d->prg_cpu[i]->status = cpu_to_le32(d->buf_size); | |
379 | } | |
380 | ||
381 | d->buf_ind = 0; | |
382 | d->buf_offset = 0; | |
383 | ||
384 | if (d->type == DMA_CTX_ISO) { | |
385 | /* Clear contextControl */ | |
386 | reg_write(ohci, d->ctrlClear, 0xffffffff); | |
387 | ||
388 | /* Set bufferFill, isochHeader, multichannel for IR context */ | |
389 | reg_write(ohci, d->ctrlSet, 0xd0000000); | |
390 | ||
391 | /* Set the context match register to match on all tags */ | |
392 | reg_write(ohci, d->ctxtMatch, 0xf0000000); | |
393 | ||
394 | /* Clear the multi channel mask high and low registers */ | |
395 | reg_write(ohci, OHCI1394_IRMultiChanMaskHiClear, 0xffffffff); | |
396 | reg_write(ohci, OHCI1394_IRMultiChanMaskLoClear, 0xffffffff); | |
397 | ||
398 | /* Set up isoRecvIntMask to generate interrupts */ | |
399 | reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << d->ctx); | |
400 | } | |
401 | ||
402 | /* Tell the controller where the first AR program is */ | |
403 | reg_write(ohci, d->cmdPtr, d->prg_bus[0] | 0x1); | |
404 | ||
405 | /* Run context */ | |
406 | reg_write(ohci, d->ctrlSet, 0x00008000); | |
407 | ||
408 | DBGMSG("Receive DMA ctx=%d initialized", d->ctx); | |
409 | } | |
410 | ||
411 | /* Initialize the dma transmit context */ | |
412 | static void initialize_dma_trm_ctx(struct dma_trm_ctx *d) | |
413 | { | |
414 | struct ti_ohci *ohci = (struct ti_ohci*)(d->ohci); | |
415 | ||
416 | /* Stop the context */ | |
417 | ohci1394_stop_context(ohci, d->ctrlClear, NULL); | |
418 | ||
419 | d->prg_ind = 0; | |
420 | d->sent_ind = 0; | |
421 | d->free_prgs = d->num_desc; | |
422 | d->branchAddrPtr = NULL; | |
423 | INIT_LIST_HEAD(&d->fifo_list); | |
424 | INIT_LIST_HEAD(&d->pending_list); | |
425 | ||
426 | if (d->type == DMA_CTX_ISO) { | |
427 | /* enable interrupts */ | |
428 | reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << d->ctx); | |
429 | } | |
430 | ||
431 | DBGMSG("Transmit DMA ctx=%d initialized", d->ctx); | |
432 | } | |
433 | ||
434 | /* Count the number of available iso contexts */ | |
435 | static int get_nb_iso_ctx(struct ti_ohci *ohci, int reg) | |
436 | { | |
437 | int i,ctx=0; | |
438 | u32 tmp; | |
439 | ||
440 | reg_write(ohci, reg, 0xffffffff); | |
441 | tmp = reg_read(ohci, reg); | |
442 | ||
443 | DBGMSG("Iso contexts reg: %08x implemented: %08x", reg, tmp); | |
444 | ||
445 | /* Count the number of contexts */ | |
446 | for (i=0; i<32; i++) { | |
447 | if (tmp & 1) ctx++; | |
448 | tmp >>= 1; | |
449 | } | |
450 | return ctx; | |
451 | } | |
452 | ||
453 | /* Global initialization */ | |
454 | static void ohci_initialize(struct ti_ohci *ohci) | |
455 | { | |
1da177e4 LT |
456 | quadlet_t buf; |
457 | int num_ports, i; | |
458 | ||
459 | spin_lock_init(&ohci->phy_reg_lock); | |
1da177e4 LT |
460 | |
461 | /* Put some defaults to these undefined bus options */ | |
462 | buf = reg_read(ohci, OHCI1394_BusOptions); | |
463 | buf |= 0x60000000; /* Enable CMC and ISC */ | |
1934b8b6 BC |
464 | if (hpsb_disable_irm) |
465 | buf &= ~0x80000000; | |
466 | else | |
1da177e4 LT |
467 | buf |= 0x80000000; /* Enable IRMC */ |
468 | buf &= ~0x00ff0000; /* XXX: Set cyc_clk_acc to zero for now */ | |
469 | buf &= ~0x18000000; /* Disable PMC and BMC */ | |
470 | reg_write(ohci, OHCI1394_BusOptions, buf); | |
471 | ||
472 | /* Set the bus number */ | |
473 | reg_write(ohci, OHCI1394_NodeID, 0x0000ffc0); | |
474 | ||
475 | /* Enable posted writes */ | |
476 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_postedWriteEnable); | |
477 | ||
478 | /* Clear link control register */ | |
479 | reg_write(ohci, OHCI1394_LinkControlClear, 0xffffffff); | |
480 | ||
481 | /* Enable cycle timer and cycle master and set the IRM | |
482 | * contender bit in our self ID packets if appropriate. */ | |
483 | reg_write(ohci, OHCI1394_LinkControlSet, | |
484 | OHCI1394_LinkControl_CycleTimerEnable | | |
485 | OHCI1394_LinkControl_CycleMaster); | |
1934b8b6 BC |
486 | i = get_phy_reg(ohci, 4) | PHY_04_LCTRL; |
487 | if (hpsb_disable_irm) | |
488 | i &= ~PHY_04_CONTENDER; | |
489 | else | |
490 | i |= PHY_04_CONTENDER; | |
491 | set_phy_reg(ohci, 4, i); | |
1da177e4 LT |
492 | |
493 | /* Set up self-id dma buffer */ | |
494 | reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->selfid_buf_bus); | |
495 | ||
2ab77524 BK |
496 | /* enable self-id */ |
497 | reg_write(ohci, OHCI1394_LinkControlSet, OHCI1394_LinkControl_RcvSelfID); | |
1da177e4 LT |
498 | |
499 | /* Set the Config ROM mapping register */ | |
500 | reg_write(ohci, OHCI1394_ConfigROMmap, ohci->csr_config_rom_bus); | |
501 | ||
502 | /* Now get our max packet size */ | |
503 | ohci->max_packet_size = | |
504 | 1<<(((reg_read(ohci, OHCI1394_BusOptions)>>12)&0xf)+1); | |
505 | ||
1da177e4 LT |
506 | /* Clear the interrupt mask */ |
507 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 0xffffffff); | |
508 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 0xffffffff); | |
509 | ||
510 | /* Clear the interrupt mask */ | |
511 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 0xffffffff); | |
512 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 0xffffffff); | |
513 | ||
514 | /* Initialize AR dma */ | |
515 | initialize_dma_rcv_ctx(&ohci->ar_req_context, 0); | |
516 | initialize_dma_rcv_ctx(&ohci->ar_resp_context, 0); | |
517 | ||
518 | /* Initialize AT dma */ | |
519 | initialize_dma_trm_ctx(&ohci->at_req_context); | |
520 | initialize_dma_trm_ctx(&ohci->at_resp_context); | |
521 | ||
180a4304 SR |
522 | /* Accept AR requests from all nodes */ |
523 | reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000); | |
524 | ||
525 | /* Set the address range of the physical response unit. | |
526 | * Most controllers do not implement it as a writable register though. | |
527 | * They will keep a hardwired offset of 0x00010000 and show 0x0 as | |
528 | * register content. | |
529 | * To actually enable physical responses is the job of our interrupt | |
530 | * handler which programs the physical request filter. */ | |
4611ed38 BC |
531 | reg_write(ohci, OHCI1394_PhyUpperBound, |
532 | OHCI1394_PHYS_UPPER_BOUND_PROGRAMMED >> 16); | |
180a4304 SR |
533 | |
534 | DBGMSG("physUpperBoundOffset=%08x", | |
535 | reg_read(ohci, OHCI1394_PhyUpperBound)); | |
1da177e4 LT |
536 | |
537 | /* Specify AT retries */ | |
538 | reg_write(ohci, OHCI1394_ATRetries, | |
539 | OHCI1394_MAX_AT_REQ_RETRIES | | |
540 | (OHCI1394_MAX_AT_RESP_RETRIES<<4) | | |
541 | (OHCI1394_MAX_PHYS_RESP_RETRIES<<8)); | |
542 | ||
543 | /* We don't want hardware swapping */ | |
544 | reg_write(ohci, OHCI1394_HCControlClear, OHCI1394_HCControl_noByteSwap); | |
545 | ||
546 | /* Enable interrupts */ | |
547 | reg_write(ohci, OHCI1394_IntMaskSet, | |
548 | OHCI1394_unrecoverableError | | |
549 | OHCI1394_masterIntEnable | | |
550 | OHCI1394_busReset | | |
551 | OHCI1394_selfIDComplete | | |
552 | OHCI1394_RSPkt | | |
553 | OHCI1394_RQPkt | | |
554 | OHCI1394_respTxComplete | | |
555 | OHCI1394_reqTxComplete | | |
556 | OHCI1394_isochRx | | |
557 | OHCI1394_isochTx | | |
e2f8165d | 558 | OHCI1394_postedWriteErr | |
57fdb58f | 559 | OHCI1394_cycleTooLong | |
1da177e4 LT |
560 | OHCI1394_cycleInconsistent); |
561 | ||
562 | /* Enable link */ | |
563 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_linkEnable); | |
564 | ||
565 | buf = reg_read(ohci, OHCI1394_Version); | |
c0f00e27 | 566 | PRINT(KERN_INFO, "OHCI-1394 %d.%d (PCI): IRQ=[%d] " |
e29419ff | 567 | "MMIO=[%llx-%llx] Max Packet=[%d] IR/IT contexts=[%d/%d]", |
1da177e4 | 568 | ((((buf) >> 16) & 0xf) + (((buf) >> 20) & 0xf) * 10), |
c0f00e27 | 569 | ((((buf) >> 4) & 0xf) + ((buf) & 0xf) * 10), ohci->dev->irq, |
e29419ff GKH |
570 | (unsigned long long)pci_resource_start(ohci->dev, 0), |
571 | (unsigned long long)pci_resource_start(ohci->dev, 0) + OHCI1394_REGISTER_SIZE - 1, | |
209171a1 SR |
572 | ohci->max_packet_size, |
573 | ohci->nb_iso_rcv_ctx, ohci->nb_iso_xmit_ctx); | |
1da177e4 LT |
574 | |
575 | /* Check all of our ports to make sure that if anything is | |
576 | * connected, we enable that port. */ | |
577 | num_ports = get_phy_reg(ohci, 2) & 0xf; | |
578 | for (i = 0; i < num_ports; i++) { | |
579 | unsigned int status; | |
580 | ||
581 | set_phy_reg(ohci, 7, i); | |
582 | status = get_phy_reg(ohci, 8); | |
583 | ||
584 | if (status & 0x20) | |
585 | set_phy_reg(ohci, 8, status & ~1); | |
586 | } | |
587 | ||
588 | /* Serial EEPROM Sanity check. */ | |
589 | if ((ohci->max_packet_size < 512) || | |
590 | (ohci->max_packet_size > 4096)) { | |
591 | /* Serial EEPROM contents are suspect, set a sane max packet | |
592 | * size and print the raw contents for bug reports if verbose | |
593 | * debug is enabled. */ | |
594 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
595 | int i; | |
596 | #endif | |
597 | ||
598 | PRINT(KERN_DEBUG, "Serial EEPROM has suspicious values, " | |
749cf766 | 599 | "attempting to set max_packet_size to 512 bytes"); |
1da177e4 LT |
600 | reg_write(ohci, OHCI1394_BusOptions, |
601 | (reg_read(ohci, OHCI1394_BusOptions) & 0xf007) | 0x8002); | |
602 | ohci->max_packet_size = 512; | |
603 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
604 | PRINT(KERN_DEBUG, " EEPROM Present: %d", | |
605 | (reg_read(ohci, OHCI1394_Version) >> 24) & 0x1); | |
606 | reg_write(ohci, OHCI1394_GUID_ROM, 0x80000000); | |
607 | ||
608 | for (i = 0; | |
609 | ((i < 1000) && | |
610 | (reg_read(ohci, OHCI1394_GUID_ROM) & 0x80000000)); i++) | |
611 | udelay(10); | |
612 | ||
613 | for (i = 0; i < 0x20; i++) { | |
614 | reg_write(ohci, OHCI1394_GUID_ROM, 0x02000000); | |
615 | PRINT(KERN_DEBUG, " EEPROM %02x: %02x", i, | |
616 | (reg_read(ohci, OHCI1394_GUID_ROM) >> 16) & 0xff); | |
617 | } | |
618 | #endif | |
619 | } | |
620 | } | |
621 | ||
622 | /* | |
623 | * Insert a packet in the DMA fifo and generate the DMA prg | |
624 | * FIXME: rewrite the program in order to accept packets crossing | |
625 | * page boundaries. | |
626 | * check also that a single dma descriptor doesn't cross a | |
627 | * page boundary. | |
628 | */ | |
629 | static void insert_packet(struct ti_ohci *ohci, | |
630 | struct dma_trm_ctx *d, struct hpsb_packet *packet) | |
631 | { | |
632 | u32 cycleTimer; | |
633 | int idx = d->prg_ind; | |
634 | ||
635 | DBGMSG("Inserting packet for node " NODE_BUS_FMT | |
636 | ", tlabel=%d, tcode=0x%x, speed=%d", | |
637 | NODE_BUS_ARGS(ohci->host, packet->node_id), packet->tlabel, | |
638 | packet->tcode, packet->speed_code); | |
639 | ||
640 | d->prg_cpu[idx]->begin.address = 0; | |
641 | d->prg_cpu[idx]->begin.branchAddress = 0; | |
642 | ||
643 | if (d->type == DMA_CTX_ASYNC_RESP) { | |
644 | /* | |
645 | * For response packets, we need to put a timeout value in | |
646 | * the 16 lower bits of the status... let's try 1 sec timeout | |
647 | */ | |
648 | cycleTimer = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
649 | d->prg_cpu[idx]->begin.status = cpu_to_le32( | |
650 | (((((cycleTimer>>25)&0x7)+1)&0x7)<<13) | | |
651 | ((cycleTimer&0x01fff000)>>12)); | |
652 | ||
653 | DBGMSG("cycleTimer: %08x timeStamp: %08x", | |
654 | cycleTimer, d->prg_cpu[idx]->begin.status); | |
655 | } else | |
656 | d->prg_cpu[idx]->begin.status = 0; | |
657 | ||
658 | if ( (packet->type == hpsb_async) || (packet->type == hpsb_raw) ) { | |
659 | ||
660 | if (packet->type == hpsb_raw) { | |
661 | d->prg_cpu[idx]->data[0] = cpu_to_le32(OHCI1394_TCODE_PHY<<4); | |
662 | d->prg_cpu[idx]->data[1] = cpu_to_le32(packet->header[0]); | |
663 | d->prg_cpu[idx]->data[2] = cpu_to_le32(packet->header[1]); | |
664 | } else { | |
665 | d->prg_cpu[idx]->data[0] = packet->speed_code<<16 | | |
666 | (packet->header[0] & 0xFFFF); | |
667 | ||
668 | if (packet->tcode == TCODE_ISO_DATA) { | |
669 | /* Sending an async stream packet */ | |
670 | d->prg_cpu[idx]->data[1] = packet->header[0] & 0xFFFF0000; | |
671 | } else { | |
672 | /* Sending a normal async request or response */ | |
673 | d->prg_cpu[idx]->data[1] = | |
674 | (packet->header[1] & 0xFFFF) | | |
675 | (packet->header[0] & 0xFFFF0000); | |
676 | d->prg_cpu[idx]->data[2] = packet->header[2]; | |
677 | d->prg_cpu[idx]->data[3] = packet->header[3]; | |
678 | } | |
9531f13a | 679 | header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode); |
1da177e4 LT |
680 | } |
681 | ||
682 | if (packet->data_size) { /* block transmit */ | |
683 | if (packet->tcode == TCODE_STREAM_DATA){ | |
684 | d->prg_cpu[idx]->begin.control = | |
685 | cpu_to_le32(DMA_CTL_OUTPUT_MORE | | |
686 | DMA_CTL_IMMEDIATE | 0x8); | |
687 | } else { | |
688 | d->prg_cpu[idx]->begin.control = | |
689 | cpu_to_le32(DMA_CTL_OUTPUT_MORE | | |
690 | DMA_CTL_IMMEDIATE | 0x10); | |
691 | } | |
692 | d->prg_cpu[idx]->end.control = | |
693 | cpu_to_le32(DMA_CTL_OUTPUT_LAST | | |
694 | DMA_CTL_IRQ | | |
695 | DMA_CTL_BRANCH | | |
696 | packet->data_size); | |
697 | /* | |
698 | * Check that the packet data buffer | |
699 | * does not cross a page boundary. | |
700 | * | |
701 | * XXX Fix this some day. eth1394 seems to trigger | |
702 | * it, but ignoring it doesn't seem to cause a | |
703 | * problem. | |
704 | */ | |
705 | #if 0 | |
706 | if (cross_bound((unsigned long)packet->data, | |
707 | packet->data_size)>0) { | |
708 | /* FIXME: do something about it */ | |
709 | PRINT(KERN_ERR, | |
710 | "%s: packet data addr: %p size %Zd bytes " | |
b1ce1fd7 | 711 | "cross page boundary", __func__, |
1da177e4 LT |
712 | packet->data, packet->data_size); |
713 | } | |
714 | #endif | |
715 | d->prg_cpu[idx]->end.address = cpu_to_le32( | |
716 | pci_map_single(ohci->dev, packet->data, | |
717 | packet->data_size, | |
718 | PCI_DMA_TODEVICE)); | |
1da177e4 LT |
719 | |
720 | d->prg_cpu[idx]->end.branchAddress = 0; | |
721 | d->prg_cpu[idx]->end.status = 0; | |
722 | if (d->branchAddrPtr) | |
723 | *(d->branchAddrPtr) = | |
724 | cpu_to_le32(d->prg_bus[idx] | 0x3); | |
725 | d->branchAddrPtr = | |
726 | &(d->prg_cpu[idx]->end.branchAddress); | |
727 | } else { /* quadlet transmit */ | |
728 | if (packet->type == hpsb_raw) | |
729 | d->prg_cpu[idx]->begin.control = | |
730 | cpu_to_le32(DMA_CTL_OUTPUT_LAST | | |
731 | DMA_CTL_IMMEDIATE | | |
732 | DMA_CTL_IRQ | | |
733 | DMA_CTL_BRANCH | | |
734 | (packet->header_size + 4)); | |
735 | else | |
736 | d->prg_cpu[idx]->begin.control = | |
737 | cpu_to_le32(DMA_CTL_OUTPUT_LAST | | |
738 | DMA_CTL_IMMEDIATE | | |
739 | DMA_CTL_IRQ | | |
740 | DMA_CTL_BRANCH | | |
741 | packet->header_size); | |
742 | ||
743 | if (d->branchAddrPtr) | |
744 | *(d->branchAddrPtr) = | |
745 | cpu_to_le32(d->prg_bus[idx] | 0x2); | |
746 | d->branchAddrPtr = | |
747 | &(d->prg_cpu[idx]->begin.branchAddress); | |
748 | } | |
749 | ||
750 | } else { /* iso packet */ | |
751 | d->prg_cpu[idx]->data[0] = packet->speed_code<<16 | | |
752 | (packet->header[0] & 0xFFFF); | |
753 | d->prg_cpu[idx]->data[1] = packet->header[0] & 0xFFFF0000; | |
9531f13a | 754 | header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode); |
1da177e4 LT |
755 | |
756 | d->prg_cpu[idx]->begin.control = | |
757 | cpu_to_le32(DMA_CTL_OUTPUT_MORE | | |
758 | DMA_CTL_IMMEDIATE | 0x8); | |
759 | d->prg_cpu[idx]->end.control = | |
760 | cpu_to_le32(DMA_CTL_OUTPUT_LAST | | |
761 | DMA_CTL_UPDATE | | |
762 | DMA_CTL_IRQ | | |
763 | DMA_CTL_BRANCH | | |
764 | packet->data_size); | |
765 | d->prg_cpu[idx]->end.address = cpu_to_le32( | |
766 | pci_map_single(ohci->dev, packet->data, | |
767 | packet->data_size, PCI_DMA_TODEVICE)); | |
1da177e4 LT |
768 | |
769 | d->prg_cpu[idx]->end.branchAddress = 0; | |
770 | d->prg_cpu[idx]->end.status = 0; | |
771 | DBGMSG("Iso xmit context info: header[%08x %08x]\n" | |
772 | " begin=%08x %08x %08x %08x\n" | |
773 | " %08x %08x %08x %08x\n" | |
774 | " end =%08x %08x %08x %08x", | |
775 | d->prg_cpu[idx]->data[0], d->prg_cpu[idx]->data[1], | |
776 | d->prg_cpu[idx]->begin.control, | |
777 | d->prg_cpu[idx]->begin.address, | |
778 | d->prg_cpu[idx]->begin.branchAddress, | |
779 | d->prg_cpu[idx]->begin.status, | |
780 | d->prg_cpu[idx]->data[0], | |
781 | d->prg_cpu[idx]->data[1], | |
782 | d->prg_cpu[idx]->data[2], | |
783 | d->prg_cpu[idx]->data[3], | |
784 | d->prg_cpu[idx]->end.control, | |
785 | d->prg_cpu[idx]->end.address, | |
786 | d->prg_cpu[idx]->end.branchAddress, | |
787 | d->prg_cpu[idx]->end.status); | |
788 | if (d->branchAddrPtr) | |
789 | *(d->branchAddrPtr) = cpu_to_le32(d->prg_bus[idx] | 0x3); | |
790 | d->branchAddrPtr = &(d->prg_cpu[idx]->end.branchAddress); | |
791 | } | |
792 | d->free_prgs--; | |
793 | ||
794 | /* queue the packet in the appropriate context queue */ | |
795 | list_add_tail(&packet->driver_list, &d->fifo_list); | |
796 | d->prg_ind = (d->prg_ind + 1) % d->num_desc; | |
797 | } | |
798 | ||
799 | /* | |
800 | * This function fills the FIFO with the (eventual) pending packets | |
801 | * and runs or wakes up the DMA prg if necessary. | |
802 | * | |
803 | * The function MUST be called with the d->lock held. | |
804 | */ | |
805 | static void dma_trm_flush(struct ti_ohci *ohci, struct dma_trm_ctx *d) | |
806 | { | |
807 | struct hpsb_packet *packet, *ptmp; | |
808 | int idx = d->prg_ind; | |
809 | int z = 0; | |
810 | ||
811 | /* insert the packets into the dma fifo */ | |
812 | list_for_each_entry_safe(packet, ptmp, &d->pending_list, driver_list) { | |
813 | if (!d->free_prgs) | |
814 | break; | |
815 | ||
816 | /* For the first packet only */ | |
817 | if (!z) | |
818 | z = (packet->data_size) ? 3 : 2; | |
819 | ||
820 | /* Insert the packet */ | |
821 | list_del_init(&packet->driver_list); | |
822 | insert_packet(ohci, d, packet); | |
823 | } | |
824 | ||
825 | /* Nothing must have been done, either no free_prgs or no packets */ | |
826 | if (z == 0) | |
827 | return; | |
828 | ||
829 | /* Is the context running ? (should be unless it is | |
830 | the first packet to be sent in this context) */ | |
831 | if (!(reg_read(ohci, d->ctrlSet) & 0x8000)) { | |
832 | u32 nodeId = reg_read(ohci, OHCI1394_NodeID); | |
833 | ||
834 | DBGMSG("Starting transmit DMA ctx=%d",d->ctx); | |
835 | reg_write(ohci, d->cmdPtr, d->prg_bus[idx] | z); | |
836 | ||
837 | /* Check that the node id is valid, and not 63 */ | |
838 | if (!(nodeId & 0x80000000) || (nodeId & 0x3f) == 63) | |
839 | PRINT(KERN_ERR, "Running dma failed because Node ID is not valid"); | |
840 | else | |
841 | reg_write(ohci, d->ctrlSet, 0x8000); | |
842 | } else { | |
843 | /* Wake up the dma context if necessary */ | |
844 | if (!(reg_read(ohci, d->ctrlSet) & 0x400)) | |
845 | DBGMSG("Waking transmit DMA ctx=%d",d->ctx); | |
846 | ||
847 | /* do this always, to avoid race condition */ | |
848 | reg_write(ohci, d->ctrlSet, 0x1000); | |
849 | } | |
850 | ||
851 | return; | |
852 | } | |
853 | ||
854 | /* Transmission of an async or iso packet */ | |
855 | static int ohci_transmit(struct hpsb_host *host, struct hpsb_packet *packet) | |
856 | { | |
857 | struct ti_ohci *ohci = host->hostdata; | |
858 | struct dma_trm_ctx *d; | |
859 | unsigned long flags; | |
860 | ||
861 | if (packet->data_size > ohci->max_packet_size) { | |
862 | PRINT(KERN_ERR, | |
863 | "Transmit packet size %Zd is too big", | |
864 | packet->data_size); | |
865 | return -EOVERFLOW; | |
866 | } | |
867 | ||
1da177e4 LT |
868 | if (packet->type == hpsb_raw) |
869 | d = &ohci->at_req_context; | |
53c96b41 | 870 | else if ((packet->tcode & 0x02) && (packet->tcode != TCODE_ISO_DATA)) |
1da177e4 LT |
871 | d = &ohci->at_resp_context; |
872 | else | |
873 | d = &ohci->at_req_context; | |
874 | ||
875 | spin_lock_irqsave(&d->lock,flags); | |
876 | ||
877 | list_add_tail(&packet->driver_list, &d->pending_list); | |
878 | ||
879 | dma_trm_flush(ohci, d); | |
880 | ||
881 | spin_unlock_irqrestore(&d->lock,flags); | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
886 | static int ohci_devctl(struct hpsb_host *host, enum devctl_cmd cmd, int arg) | |
887 | { | |
888 | struct ti_ohci *ohci = host->hostdata; | |
53c96b41 | 889 | int retval = 0, phy_reg; |
1da177e4 LT |
890 | |
891 | switch (cmd) { | |
892 | case RESET_BUS: | |
893 | switch (arg) { | |
894 | case SHORT_RESET: | |
895 | phy_reg = get_phy_reg(ohci, 5); | |
896 | phy_reg |= 0x40; | |
897 | set_phy_reg(ohci, 5, phy_reg); /* set ISBR */ | |
898 | break; | |
899 | case LONG_RESET: | |
900 | phy_reg = get_phy_reg(ohci, 1); | |
901 | phy_reg |= 0x40; | |
902 | set_phy_reg(ohci, 1, phy_reg); /* set IBR */ | |
903 | break; | |
904 | case SHORT_RESET_NO_FORCE_ROOT: | |
905 | phy_reg = get_phy_reg(ohci, 1); | |
906 | if (phy_reg & 0x80) { | |
907 | phy_reg &= ~0x80; | |
908 | set_phy_reg(ohci, 1, phy_reg); /* clear RHB */ | |
909 | } | |
910 | ||
911 | phy_reg = get_phy_reg(ohci, 5); | |
912 | phy_reg |= 0x40; | |
913 | set_phy_reg(ohci, 5, phy_reg); /* set ISBR */ | |
914 | break; | |
915 | case LONG_RESET_NO_FORCE_ROOT: | |
916 | phy_reg = get_phy_reg(ohci, 1); | |
917 | phy_reg &= ~0x80; | |
918 | phy_reg |= 0x40; | |
919 | set_phy_reg(ohci, 1, phy_reg); /* clear RHB, set IBR */ | |
920 | break; | |
921 | case SHORT_RESET_FORCE_ROOT: | |
922 | phy_reg = get_phy_reg(ohci, 1); | |
923 | if (!(phy_reg & 0x80)) { | |
924 | phy_reg |= 0x80; | |
925 | set_phy_reg(ohci, 1, phy_reg); /* set RHB */ | |
926 | } | |
927 | ||
928 | phy_reg = get_phy_reg(ohci, 5); | |
929 | phy_reg |= 0x40; | |
930 | set_phy_reg(ohci, 5, phy_reg); /* set ISBR */ | |
931 | break; | |
932 | case LONG_RESET_FORCE_ROOT: | |
933 | phy_reg = get_phy_reg(ohci, 1); | |
934 | phy_reg |= 0xc0; | |
935 | set_phy_reg(ohci, 1, phy_reg); /* set RHB and IBR */ | |
936 | break; | |
937 | default: | |
938 | retval = -1; | |
939 | } | |
940 | break; | |
941 | ||
942 | case GET_CYCLE_COUNTER: | |
943 | retval = reg_read(ohci, OHCI1394_IsochronousCycleTimer); | |
944 | break; | |
945 | ||
946 | case SET_CYCLE_COUNTER: | |
947 | reg_write(ohci, OHCI1394_IsochronousCycleTimer, arg); | |
948 | break; | |
949 | ||
950 | case SET_BUS_ID: | |
951 | PRINT(KERN_ERR, "devctl command SET_BUS_ID err"); | |
952 | break; | |
953 | ||
954 | case ACT_CYCLE_MASTER: | |
955 | if (arg) { | |
956 | /* check if we are root and other nodes are present */ | |
957 | u32 nodeId = reg_read(ohci, OHCI1394_NodeID); | |
958 | if ((nodeId & (1<<30)) && (nodeId & 0x3f)) { | |
959 | /* | |
960 | * enable cycleTimer, cycleMaster | |
961 | */ | |
962 | DBGMSG("Cycle master enabled"); | |
963 | reg_write(ohci, OHCI1394_LinkControlSet, | |
964 | OHCI1394_LinkControl_CycleTimerEnable | | |
965 | OHCI1394_LinkControl_CycleMaster); | |
966 | } | |
967 | } else { | |
968 | /* disable cycleTimer, cycleMaster, cycleSource */ | |
969 | reg_write(ohci, OHCI1394_LinkControlClear, | |
970 | OHCI1394_LinkControl_CycleTimerEnable | | |
971 | OHCI1394_LinkControl_CycleMaster | | |
972 | OHCI1394_LinkControl_CycleSource); | |
973 | } | |
974 | break; | |
975 | ||
976 | case CANCEL_REQUESTS: | |
977 | DBGMSG("Cancel request received"); | |
978 | dma_trm_reset(&ohci->at_req_context); | |
979 | dma_trm_reset(&ohci->at_resp_context); | |
980 | break; | |
981 | ||
1da177e4 LT |
982 | default: |
983 | PRINT_G(KERN_ERR, "ohci_devctl cmd %d not implemented yet", | |
984 | cmd); | |
985 | break; | |
986 | } | |
987 | return retval; | |
988 | } | |
989 | ||
990 | /*********************************** | |
991 | * rawiso ISO reception * | |
992 | ***********************************/ | |
993 | ||
994 | /* | |
995 | We use either buffer-fill or packet-per-buffer DMA mode. The DMA | |
996 | buffer is split into "blocks" (regions described by one DMA | |
997 | descriptor). Each block must be one page or less in size, and | |
998 | must not cross a page boundary. | |
999 | ||
1000 | There is one little wrinkle with buffer-fill mode: a packet that | |
1001 | starts in the final block may wrap around into the first block. But | |
1002 | the user API expects all packets to be contiguous. Our solution is | |
1003 | to keep the very last page of the DMA buffer in reserve - if a | |
1004 | packet spans the gap, we copy its tail into this page. | |
1005 | */ | |
1006 | ||
1007 | struct ohci_iso_recv { | |
1008 | struct ti_ohci *ohci; | |
1009 | ||
1010 | struct ohci1394_iso_tasklet task; | |
1011 | int task_active; | |
1012 | ||
1013 | enum { BUFFER_FILL_MODE = 0, | |
1014 | PACKET_PER_BUFFER_MODE = 1 } dma_mode; | |
1015 | ||
1016 | /* memory and PCI mapping for the DMA descriptors */ | |
1017 | struct dma_prog_region prog; | |
1018 | struct dma_cmd *block; /* = (struct dma_cmd*) prog.virt */ | |
1019 | ||
1020 | /* how many DMA blocks fit in the buffer */ | |
1021 | unsigned int nblocks; | |
1022 | ||
1023 | /* stride of DMA blocks */ | |
1024 | unsigned int buf_stride; | |
1025 | ||
1026 | /* number of blocks to batch between interrupts */ | |
1027 | int block_irq_interval; | |
1028 | ||
1029 | /* block that DMA will finish next */ | |
1030 | int block_dma; | |
1031 | ||
1032 | /* (buffer-fill only) block that the reader will release next */ | |
1033 | int block_reader; | |
1034 | ||
1035 | /* (buffer-fill only) bytes of buffer the reader has released, | |
1036 | less than one block */ | |
1037 | int released_bytes; | |
1038 | ||
1039 | /* (buffer-fill only) buffer offset at which the next packet will appear */ | |
1040 | int dma_offset; | |
1041 | ||
1042 | /* OHCI DMA context control registers */ | |
1043 | u32 ContextControlSet; | |
1044 | u32 ContextControlClear; | |
1045 | u32 CommandPtr; | |
1046 | u32 ContextMatch; | |
1047 | }; | |
1048 | ||
1049 | static void ohci_iso_recv_task(unsigned long data); | |
1050 | static void ohci_iso_recv_stop(struct hpsb_iso *iso); | |
1051 | static void ohci_iso_recv_shutdown(struct hpsb_iso *iso); | |
1052 | static int ohci_iso_recv_start(struct hpsb_iso *iso, int cycle, int tag_mask, int sync); | |
1053 | static void ohci_iso_recv_program(struct hpsb_iso *iso); | |
1054 | ||
1055 | static int ohci_iso_recv_init(struct hpsb_iso *iso) | |
1056 | { | |
1057 | struct ti_ohci *ohci = iso->host->hostdata; | |
1058 | struct ohci_iso_recv *recv; | |
1059 | int ctx; | |
1060 | int ret = -ENOMEM; | |
1061 | ||
e94b1766 | 1062 | recv = kmalloc(sizeof(*recv), GFP_KERNEL); |
1da177e4 LT |
1063 | if (!recv) |
1064 | return -ENOMEM; | |
1065 | ||
1066 | iso->hostdata = recv; | |
1067 | recv->ohci = ohci; | |
1068 | recv->task_active = 0; | |
1069 | dma_prog_region_init(&recv->prog); | |
1070 | recv->block = NULL; | |
1071 | ||
1072 | /* use buffer-fill mode, unless irq_interval is 1 | |
1073 | (note: multichannel requires buffer-fill) */ | |
1074 | ||
1075 | if (((iso->irq_interval == 1 && iso->dma_mode == HPSB_ISO_DMA_OLD_ABI) || | |
1076 | iso->dma_mode == HPSB_ISO_DMA_PACKET_PER_BUFFER) && iso->channel != -1) { | |
1077 | recv->dma_mode = PACKET_PER_BUFFER_MODE; | |
1078 | } else { | |
1079 | recv->dma_mode = BUFFER_FILL_MODE; | |
1080 | } | |
1081 | ||
1082 | /* set nblocks, buf_stride, block_irq_interval */ | |
1083 | ||
1084 | if (recv->dma_mode == BUFFER_FILL_MODE) { | |
1085 | recv->buf_stride = PAGE_SIZE; | |
1086 | ||
1087 | /* one block per page of data in the DMA buffer, minus the final guard page */ | |
1088 | recv->nblocks = iso->buf_size/PAGE_SIZE - 1; | |
1089 | if (recv->nblocks < 3) { | |
1090 | DBGMSG("ohci_iso_recv_init: DMA buffer too small"); | |
1091 | goto err; | |
1092 | } | |
1093 | ||
1094 | /* iso->irq_interval is in packets - translate that to blocks */ | |
1095 | if (iso->irq_interval == 1) | |
1096 | recv->block_irq_interval = 1; | |
1097 | else | |
1098 | recv->block_irq_interval = iso->irq_interval * | |
1099 | ((recv->nblocks+1)/iso->buf_packets); | |
1100 | if (recv->block_irq_interval*4 > recv->nblocks) | |
1101 | recv->block_irq_interval = recv->nblocks/4; | |
1102 | if (recv->block_irq_interval < 1) | |
1103 | recv->block_irq_interval = 1; | |
1104 | ||
1105 | } else { | |
1106 | int max_packet_size; | |
1107 | ||
1108 | recv->nblocks = iso->buf_packets; | |
1109 | recv->block_irq_interval = iso->irq_interval; | |
1110 | if (recv->block_irq_interval * 4 > iso->buf_packets) | |
1111 | recv->block_irq_interval = iso->buf_packets / 4; | |
1112 | if (recv->block_irq_interval < 1) | |
1113 | recv->block_irq_interval = 1; | |
1114 | ||
1115 | /* choose a buffer stride */ | |
1116 | /* must be a power of 2, and <= PAGE_SIZE */ | |
1117 | ||
1118 | max_packet_size = iso->buf_size / iso->buf_packets; | |
1119 | ||
1120 | for (recv->buf_stride = 8; recv->buf_stride < max_packet_size; | |
1121 | recv->buf_stride *= 2); | |
1122 | ||
1123 | if (recv->buf_stride*iso->buf_packets > iso->buf_size || | |
1124 | recv->buf_stride > PAGE_SIZE) { | |
1125 | /* this shouldn't happen, but anyway... */ | |
1126 | DBGMSG("ohci_iso_recv_init: problem choosing a buffer stride"); | |
1127 | goto err; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | recv->block_reader = 0; | |
1132 | recv->released_bytes = 0; | |
1133 | recv->block_dma = 0; | |
1134 | recv->dma_offset = 0; | |
1135 | ||
1136 | /* size of DMA program = one descriptor per block */ | |
1137 | if (dma_prog_region_alloc(&recv->prog, | |
1138 | sizeof(struct dma_cmd) * recv->nblocks, | |
1139 | recv->ohci->dev)) | |
1140 | goto err; | |
1141 | ||
1142 | recv->block = (struct dma_cmd*) recv->prog.kvirt; | |
1143 | ||
1144 | ohci1394_init_iso_tasklet(&recv->task, | |
1145 | iso->channel == -1 ? OHCI_ISO_MULTICHANNEL_RECEIVE : | |
1146 | OHCI_ISO_RECEIVE, | |
1147 | ohci_iso_recv_task, (unsigned long) iso); | |
1148 | ||
e4ec0f23 JM |
1149 | if (ohci1394_register_iso_tasklet(recv->ohci, &recv->task) < 0) { |
1150 | ret = -EBUSY; | |
1da177e4 | 1151 | goto err; |
e4ec0f23 | 1152 | } |
1da177e4 LT |
1153 | |
1154 | recv->task_active = 1; | |
1155 | ||
1156 | /* recv context registers are spaced 32 bytes apart */ | |
1157 | ctx = recv->task.context; | |
1158 | recv->ContextControlSet = OHCI1394_IsoRcvContextControlSet + 32 * ctx; | |
1159 | recv->ContextControlClear = OHCI1394_IsoRcvContextControlClear + 32 * ctx; | |
1160 | recv->CommandPtr = OHCI1394_IsoRcvCommandPtr + 32 * ctx; | |
1161 | recv->ContextMatch = OHCI1394_IsoRcvContextMatch + 32 * ctx; | |
1162 | ||
1163 | if (iso->channel == -1) { | |
1164 | /* clear multi-channel selection mask */ | |
1165 | reg_write(recv->ohci, OHCI1394_IRMultiChanMaskHiClear, 0xFFFFFFFF); | |
1166 | reg_write(recv->ohci, OHCI1394_IRMultiChanMaskLoClear, 0xFFFFFFFF); | |
1167 | } | |
1168 | ||
1169 | /* write the DMA program */ | |
1170 | ohci_iso_recv_program(iso); | |
1171 | ||
1172 | DBGMSG("ohci_iso_recv_init: %s mode, DMA buffer is %lu pages" | |
1173 | " (%u bytes), using %u blocks, buf_stride %u, block_irq_interval %d", | |
1174 | recv->dma_mode == BUFFER_FILL_MODE ? | |
1175 | "buffer-fill" : "packet-per-buffer", | |
1176 | iso->buf_size/PAGE_SIZE, iso->buf_size, | |
1177 | recv->nblocks, recv->buf_stride, recv->block_irq_interval); | |
1178 | ||
1179 | return 0; | |
1180 | ||
1181 | err: | |
1182 | ohci_iso_recv_shutdown(iso); | |
1183 | return ret; | |
1184 | } | |
1185 | ||
1186 | static void ohci_iso_recv_stop(struct hpsb_iso *iso) | |
1187 | { | |
1188 | struct ohci_iso_recv *recv = iso->hostdata; | |
1189 | ||
1190 | /* disable interrupts */ | |
1191 | reg_write(recv->ohci, OHCI1394_IsoRecvIntMaskClear, 1 << recv->task.context); | |
1192 | ||
1193 | /* halt DMA */ | |
1194 | ohci1394_stop_context(recv->ohci, recv->ContextControlClear, NULL); | |
1195 | } | |
1196 | ||
1197 | static void ohci_iso_recv_shutdown(struct hpsb_iso *iso) | |
1198 | { | |
1199 | struct ohci_iso_recv *recv = iso->hostdata; | |
1200 | ||
1201 | if (recv->task_active) { | |
1202 | ohci_iso_recv_stop(iso); | |
1203 | ohci1394_unregister_iso_tasklet(recv->ohci, &recv->task); | |
1204 | recv->task_active = 0; | |
1205 | } | |
1206 | ||
1207 | dma_prog_region_free(&recv->prog); | |
1208 | kfree(recv); | |
1209 | iso->hostdata = NULL; | |
1210 | } | |
1211 | ||
1212 | /* set up a "gapped" ring buffer DMA program */ | |
1213 | static void ohci_iso_recv_program(struct hpsb_iso *iso) | |
1214 | { | |
1215 | struct ohci_iso_recv *recv = iso->hostdata; | |
1216 | int blk; | |
1217 | ||
1218 | /* address of 'branch' field in previous DMA descriptor */ | |
1219 | u32 *prev_branch = NULL; | |
1220 | ||
1221 | for (blk = 0; blk < recv->nblocks; blk++) { | |
1222 | u32 control; | |
1223 | ||
1224 | /* the DMA descriptor */ | |
1225 | struct dma_cmd *cmd = &recv->block[blk]; | |
1226 | ||
1227 | /* offset of the DMA descriptor relative to the DMA prog buffer */ | |
1228 | unsigned long prog_offset = blk * sizeof(struct dma_cmd); | |
1229 | ||
1230 | /* offset of this packet's data within the DMA buffer */ | |
1231 | unsigned long buf_offset = blk * recv->buf_stride; | |
1232 | ||
1233 | if (recv->dma_mode == BUFFER_FILL_MODE) { | |
1234 | control = 2 << 28; /* INPUT_MORE */ | |
1235 | } else { | |
1236 | control = 3 << 28; /* INPUT_LAST */ | |
1237 | } | |
1238 | ||
1239 | control |= 8 << 24; /* s = 1, update xferStatus and resCount */ | |
1240 | ||
1241 | /* interrupt on last block, and at intervals */ | |
1242 | if (blk == recv->nblocks-1 || (blk % recv->block_irq_interval) == 0) { | |
1243 | control |= 3 << 20; /* want interrupt */ | |
1244 | } | |
1245 | ||
1246 | control |= 3 << 18; /* enable branch to address */ | |
1247 | control |= recv->buf_stride; | |
1248 | ||
1249 | cmd->control = cpu_to_le32(control); | |
1250 | cmd->address = cpu_to_le32(dma_region_offset_to_bus(&iso->data_buf, buf_offset)); | |
1251 | cmd->branchAddress = 0; /* filled in on next loop */ | |
1252 | cmd->status = cpu_to_le32(recv->buf_stride); | |
1253 | ||
1254 | /* link the previous descriptor to this one */ | |
1255 | if (prev_branch) { | |
1256 | *prev_branch = cpu_to_le32(dma_prog_region_offset_to_bus(&recv->prog, prog_offset) | 1); | |
1257 | } | |
1258 | ||
1259 | prev_branch = &cmd->branchAddress; | |
1260 | } | |
1261 | ||
1262 | /* the final descriptor's branch address and Z should be left at 0 */ | |
1263 | } | |
1264 | ||
1265 | /* listen or unlisten to a specific channel (multi-channel mode only) */ | |
1266 | static void ohci_iso_recv_change_channel(struct hpsb_iso *iso, unsigned char channel, int listen) | |
1267 | { | |
1268 | struct ohci_iso_recv *recv = iso->hostdata; | |
1269 | int reg, i; | |
1270 | ||
1271 | if (channel < 32) { | |
1272 | reg = listen ? OHCI1394_IRMultiChanMaskLoSet : OHCI1394_IRMultiChanMaskLoClear; | |
1273 | i = channel; | |
1274 | } else { | |
1275 | reg = listen ? OHCI1394_IRMultiChanMaskHiSet : OHCI1394_IRMultiChanMaskHiClear; | |
1276 | i = channel - 32; | |
1277 | } | |
1278 | ||
1279 | reg_write(recv->ohci, reg, (1 << i)); | |
1280 | ||
1281 | /* issue a dummy read to force all PCI writes to be posted immediately */ | |
1282 | mb(); | |
1283 | reg_read(recv->ohci, OHCI1394_IsochronousCycleTimer); | |
1284 | } | |
1285 | ||
1286 | static void ohci_iso_recv_set_channel_mask(struct hpsb_iso *iso, u64 mask) | |
1287 | { | |
1288 | struct ohci_iso_recv *recv = iso->hostdata; | |
1289 | int i; | |
1290 | ||
1291 | for (i = 0; i < 64; i++) { | |
1292 | if (mask & (1ULL << i)) { | |
1293 | if (i < 32) | |
1294 | reg_write(recv->ohci, OHCI1394_IRMultiChanMaskLoSet, (1 << i)); | |
1295 | else | |
1296 | reg_write(recv->ohci, OHCI1394_IRMultiChanMaskHiSet, (1 << (i-32))); | |
1297 | } else { | |
1298 | if (i < 32) | |
1299 | reg_write(recv->ohci, OHCI1394_IRMultiChanMaskLoClear, (1 << i)); | |
1300 | else | |
1301 | reg_write(recv->ohci, OHCI1394_IRMultiChanMaskHiClear, (1 << (i-32))); | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | /* issue a dummy read to force all PCI writes to be posted immediately */ | |
1306 | mb(); | |
1307 | reg_read(recv->ohci, OHCI1394_IsochronousCycleTimer); | |
1308 | } | |
1309 | ||
1310 | static int ohci_iso_recv_start(struct hpsb_iso *iso, int cycle, int tag_mask, int sync) | |
1311 | { | |
1312 | struct ohci_iso_recv *recv = iso->hostdata; | |
1313 | struct ti_ohci *ohci = recv->ohci; | |
1314 | u32 command, contextMatch; | |
1315 | ||
1316 | reg_write(recv->ohci, recv->ContextControlClear, 0xFFFFFFFF); | |
1317 | wmb(); | |
1318 | ||
1319 | /* always keep ISO headers */ | |
1320 | command = (1 << 30); | |
1321 | ||
1322 | if (recv->dma_mode == BUFFER_FILL_MODE) | |
1323 | command |= (1 << 31); | |
1324 | ||
1325 | reg_write(recv->ohci, recv->ContextControlSet, command); | |
1326 | ||
1327 | /* match on specified tags */ | |
1328 | contextMatch = tag_mask << 28; | |
1329 | ||
1330 | if (iso->channel == -1) { | |
1331 | /* enable multichannel reception */ | |
1332 | reg_write(recv->ohci, recv->ContextControlSet, (1 << 28)); | |
1333 | } else { | |
1334 | /* listen on channel */ | |
1335 | contextMatch |= iso->channel; | |
1336 | } | |
1337 | ||
1338 | if (cycle != -1) { | |
1339 | u32 seconds; | |
1340 | ||
1341 | /* enable cycleMatch */ | |
1342 | reg_write(recv->ohci, recv->ContextControlSet, (1 << 29)); | |
1343 | ||
1344 | /* set starting cycle */ | |
1345 | cycle &= 0x1FFF; | |
1346 | ||
1347 | /* 'cycle' is only mod 8000, but we also need two 'seconds' bits - | |
1348 | just snarf them from the current time */ | |
1349 | seconds = reg_read(recv->ohci, OHCI1394_IsochronousCycleTimer) >> 25; | |
1350 | ||
1351 | /* advance one second to give some extra time for DMA to start */ | |
1352 | seconds += 1; | |
1353 | ||
1354 | cycle |= (seconds & 3) << 13; | |
1355 | ||
1356 | contextMatch |= cycle << 12; | |
1357 | } | |
1358 | ||
1359 | if (sync != -1) { | |
1360 | /* set sync flag on first DMA descriptor */ | |
1361 | struct dma_cmd *cmd = &recv->block[recv->block_dma]; | |
1362 | cmd->control |= cpu_to_le32(DMA_CTL_WAIT); | |
1363 | ||
1364 | /* match sync field */ | |
1365 | contextMatch |= (sync&0xf)<<8; | |
1366 | } | |
1367 | ||
1368 | reg_write(recv->ohci, recv->ContextMatch, contextMatch); | |
1369 | ||
1370 | /* address of first descriptor block */ | |
1371 | command = dma_prog_region_offset_to_bus(&recv->prog, | |
1372 | recv->block_dma * sizeof(struct dma_cmd)); | |
1373 | command |= 1; /* Z=1 */ | |
1374 | ||
1375 | reg_write(recv->ohci, recv->CommandPtr, command); | |
1376 | ||
1377 | /* enable interrupts */ | |
1378 | reg_write(recv->ohci, OHCI1394_IsoRecvIntMaskSet, 1 << recv->task.context); | |
1379 | ||
1380 | wmb(); | |
1381 | ||
1382 | /* run */ | |
1383 | reg_write(recv->ohci, recv->ContextControlSet, 0x8000); | |
1384 | ||
1385 | /* issue a dummy read of the cycle timer register to force | |
1386 | all PCI writes to be posted immediately */ | |
1387 | mb(); | |
1388 | reg_read(recv->ohci, OHCI1394_IsochronousCycleTimer); | |
1389 | ||
1390 | /* check RUN */ | |
1391 | if (!(reg_read(recv->ohci, recv->ContextControlSet) & 0x8000)) { | |
1392 | PRINT(KERN_ERR, | |
1393 | "Error starting IR DMA (ContextControl 0x%08x)\n", | |
1394 | reg_read(recv->ohci, recv->ContextControlSet)); | |
1395 | return -1; | |
1396 | } | |
1397 | ||
1398 | return 0; | |
1399 | } | |
1400 | ||
1401 | static void ohci_iso_recv_release_block(struct ohci_iso_recv *recv, int block) | |
1402 | { | |
1403 | /* re-use the DMA descriptor for the block */ | |
1404 | /* by linking the previous descriptor to it */ | |
1405 | ||
1406 | int next_i = block; | |
1407 | int prev_i = (next_i == 0) ? (recv->nblocks - 1) : (next_i - 1); | |
1408 | ||
1409 | struct dma_cmd *next = &recv->block[next_i]; | |
1410 | struct dma_cmd *prev = &recv->block[prev_i]; | |
1934b8b6 BC |
1411 | |
1412 | /* ignore out-of-range requests */ | |
1413 | if ((block < 0) || (block > recv->nblocks)) | |
1414 | return; | |
1da177e4 LT |
1415 | |
1416 | /* 'next' becomes the new end of the DMA chain, | |
1417 | so disable branch and enable interrupt */ | |
1418 | next->branchAddress = 0; | |
1419 | next->control |= cpu_to_le32(3 << 20); | |
1420 | next->status = cpu_to_le32(recv->buf_stride); | |
1421 | ||
1422 | /* link prev to next */ | |
1423 | prev->branchAddress = cpu_to_le32(dma_prog_region_offset_to_bus(&recv->prog, | |
1424 | sizeof(struct dma_cmd) * next_i) | |
1425 | | 1); /* Z=1 */ | |
1426 | ||
1427 | /* disable interrupt on previous DMA descriptor, except at intervals */ | |
1428 | if ((prev_i % recv->block_irq_interval) == 0) { | |
1429 | prev->control |= cpu_to_le32(3 << 20); /* enable interrupt */ | |
1430 | } else { | |
1431 | prev->control &= cpu_to_le32(~(3<<20)); /* disable interrupt */ | |
1432 | } | |
1433 | wmb(); | |
1434 | ||
1435 | /* wake up DMA in case it fell asleep */ | |
1436 | reg_write(recv->ohci, recv->ContextControlSet, (1 << 12)); | |
1437 | } | |
1438 | ||
1439 | static void ohci_iso_recv_bufferfill_release(struct ohci_iso_recv *recv, | |
1440 | struct hpsb_iso_packet_info *info) | |
1441 | { | |
1da177e4 | 1442 | /* release the memory where the packet was */ |
1934b8b6 | 1443 | recv->released_bytes += info->total_len; |
1da177e4 LT |
1444 | |
1445 | /* have we released enough memory for one block? */ | |
1446 | while (recv->released_bytes > recv->buf_stride) { | |
1447 | ohci_iso_recv_release_block(recv, recv->block_reader); | |
1448 | recv->block_reader = (recv->block_reader + 1) % recv->nblocks; | |
1449 | recv->released_bytes -= recv->buf_stride; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | static inline void ohci_iso_recv_release(struct hpsb_iso *iso, struct hpsb_iso_packet_info *info) | |
1454 | { | |
1455 | struct ohci_iso_recv *recv = iso->hostdata; | |
1456 | if (recv->dma_mode == BUFFER_FILL_MODE) { | |
1457 | ohci_iso_recv_bufferfill_release(recv, info); | |
1458 | } else { | |
1459 | ohci_iso_recv_release_block(recv, info - iso->infos); | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | /* parse all packets from blocks that have been fully received */ | |
1464 | static void ohci_iso_recv_bufferfill_parse(struct hpsb_iso *iso, struct ohci_iso_recv *recv) | |
1465 | { | |
1466 | int wake = 0; | |
1467 | int runaway = 0; | |
1468 | struct ti_ohci *ohci = recv->ohci; | |
1469 | ||
1470 | while (1) { | |
1471 | /* we expect the next parsable packet to begin at recv->dma_offset */ | |
1472 | /* note: packet layout is as shown in section 10.6.1.1 of the OHCI spec */ | |
1473 | ||
1474 | unsigned int offset; | |
1934b8b6 | 1475 | unsigned short len, cycle, total_len; |
1da177e4 LT |
1476 | unsigned char channel, tag, sy; |
1477 | ||
1478 | unsigned char *p = iso->data_buf.kvirt; | |
1479 | ||
1480 | unsigned int this_block = recv->dma_offset/recv->buf_stride; | |
1481 | ||
1482 | /* don't loop indefinitely */ | |
1483 | if (runaway++ > 100000) { | |
1484 | atomic_inc(&iso->overflows); | |
1485 | PRINT(KERN_ERR, | |
1486 | "IR DMA error - Runaway during buffer parsing!\n"); | |
1487 | break; | |
1488 | } | |
1489 | ||
1490 | /* stop parsing once we arrive at block_dma (i.e. don't get ahead of DMA) */ | |
1491 | if (this_block == recv->block_dma) | |
1492 | break; | |
1493 | ||
1494 | wake = 1; | |
1495 | ||
1496 | /* parse data length, tag, channel, and sy */ | |
1497 | ||
1498 | /* note: we keep our own local copies of 'len' and 'offset' | |
1499 | so the user can't mess with them by poking in the mmap area */ | |
1500 | ||
1501 | len = p[recv->dma_offset+2] | (p[recv->dma_offset+3] << 8); | |
1502 | ||
1503 | if (len > 4096) { | |
1504 | PRINT(KERN_ERR, | |
1505 | "IR DMA error - bogus 'len' value %u\n", len); | |
1506 | } | |
1507 | ||
1508 | channel = p[recv->dma_offset+1] & 0x3F; | |
1509 | tag = p[recv->dma_offset+1] >> 6; | |
1510 | sy = p[recv->dma_offset+0] & 0xF; | |
1511 | ||
1512 | /* advance to data payload */ | |
1513 | recv->dma_offset += 4; | |
1514 | ||
1515 | /* check for wrap-around */ | |
1516 | if (recv->dma_offset >= recv->buf_stride*recv->nblocks) { | |
1517 | recv->dma_offset -= recv->buf_stride*recv->nblocks; | |
1518 | } | |
1519 | ||
1520 | /* dma_offset now points to the first byte of the data payload */ | |
1521 | offset = recv->dma_offset; | |
1522 | ||
1523 | /* advance to xferStatus/timeStamp */ | |
1524 | recv->dma_offset += len; | |
1525 | ||
1934b8b6 | 1526 | total_len = len + 8; /* 8 bytes header+trailer in OHCI packet */ |
1da177e4 LT |
1527 | /* payload is padded to 4 bytes */ |
1528 | if (len % 4) { | |
1529 | recv->dma_offset += 4 - (len%4); | |
1934b8b6 | 1530 | total_len += 4 - (len%4); |
1da177e4 LT |
1531 | } |
1532 | ||
1533 | /* check for wrap-around */ | |
1534 | if (recv->dma_offset >= recv->buf_stride*recv->nblocks) { | |
1535 | /* uh oh, the packet data wraps from the last | |
1536 | to the first DMA block - make the packet | |
1537 | contiguous by copying its "tail" into the | |
1538 | guard page */ | |
1539 | ||
1540 | int guard_off = recv->buf_stride*recv->nblocks; | |
1541 | int tail_len = len - (guard_off - offset); | |
1542 | ||
1543 | if (tail_len > 0 && tail_len < recv->buf_stride) { | |
1544 | memcpy(iso->data_buf.kvirt + guard_off, | |
1545 | iso->data_buf.kvirt, | |
1546 | tail_len); | |
1547 | } | |
1548 | ||
1549 | recv->dma_offset -= recv->buf_stride*recv->nblocks; | |
1550 | } | |
1551 | ||
1552 | /* parse timestamp */ | |
1553 | cycle = p[recv->dma_offset+0] | (p[recv->dma_offset+1]<<8); | |
1554 | cycle &= 0x1FFF; | |
1555 | ||
1556 | /* advance to next packet */ | |
1557 | recv->dma_offset += 4; | |
1558 | ||
1559 | /* check for wrap-around */ | |
1560 | if (recv->dma_offset >= recv->buf_stride*recv->nblocks) { | |
1561 | recv->dma_offset -= recv->buf_stride*recv->nblocks; | |
1562 | } | |
1563 | ||
1934b8b6 | 1564 | hpsb_iso_packet_received(iso, offset, len, total_len, cycle, channel, tag, sy); |
1da177e4 LT |
1565 | } |
1566 | ||
1567 | if (wake) | |
1568 | hpsb_iso_wake(iso); | |
1569 | } | |
1570 | ||
1571 | static void ohci_iso_recv_bufferfill_task(struct hpsb_iso *iso, struct ohci_iso_recv *recv) | |
1572 | { | |
1573 | int loop; | |
1574 | struct ti_ohci *ohci = recv->ohci; | |
1575 | ||
1576 | /* loop over all blocks */ | |
1577 | for (loop = 0; loop < recv->nblocks; loop++) { | |
1578 | ||
1579 | /* check block_dma to see if it's done */ | |
1580 | struct dma_cmd *im = &recv->block[recv->block_dma]; | |
1581 | ||
1582 | /* check the DMA descriptor for new writes to xferStatus */ | |
1583 | u16 xferstatus = le32_to_cpu(im->status) >> 16; | |
1584 | ||
1585 | /* rescount is the number of bytes *remaining to be written* in the block */ | |
1586 | u16 rescount = le32_to_cpu(im->status) & 0xFFFF; | |
1587 | ||
1588 | unsigned char event = xferstatus & 0x1F; | |
1589 | ||
1590 | if (!event) { | |
1591 | /* nothing has happened to this block yet */ | |
1592 | break; | |
1593 | } | |
1594 | ||
1595 | if (event != 0x11) { | |
1596 | atomic_inc(&iso->overflows); | |
1597 | PRINT(KERN_ERR, | |
1598 | "IR DMA error - OHCI error code 0x%02x\n", event); | |
1599 | } | |
1600 | ||
1601 | if (rescount != 0) { | |
1602 | /* the card is still writing to this block; | |
1603 | we can't touch it until it's done */ | |
1604 | break; | |
1605 | } | |
1606 | ||
1607 | /* OK, the block is finished... */ | |
1608 | ||
1609 | /* sync our view of the block */ | |
1610 | dma_region_sync_for_cpu(&iso->data_buf, recv->block_dma*recv->buf_stride, recv->buf_stride); | |
1611 | ||
1612 | /* reset the DMA descriptor */ | |
1613 | im->status = recv->buf_stride; | |
1614 | ||
1615 | /* advance block_dma */ | |
1616 | recv->block_dma = (recv->block_dma + 1) % recv->nblocks; | |
1617 | ||
1618 | if ((recv->block_dma+1) % recv->nblocks == recv->block_reader) { | |
1619 | atomic_inc(&iso->overflows); | |
1620 | DBGMSG("ISO reception overflow - " | |
1621 | "ran out of DMA blocks"); | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | /* parse any packets that have arrived */ | |
1626 | ohci_iso_recv_bufferfill_parse(iso, recv); | |
1627 | } | |
1628 | ||
1629 | static void ohci_iso_recv_packetperbuf_task(struct hpsb_iso *iso, struct ohci_iso_recv *recv) | |
1630 | { | |
1631 | int count; | |
1632 | int wake = 0; | |
1633 | struct ti_ohci *ohci = recv->ohci; | |
1634 | ||
1635 | /* loop over the entire buffer */ | |
1636 | for (count = 0; count < recv->nblocks; count++) { | |
1637 | u32 packet_len = 0; | |
1638 | ||
1639 | /* pointer to the DMA descriptor */ | |
1640 | struct dma_cmd *il = ((struct dma_cmd*) recv->prog.kvirt) + iso->pkt_dma; | |
1641 | ||
1642 | /* check the DMA descriptor for new writes to xferStatus */ | |
1643 | u16 xferstatus = le32_to_cpu(il->status) >> 16; | |
1644 | u16 rescount = le32_to_cpu(il->status) & 0xFFFF; | |
1645 | ||
1646 | unsigned char event = xferstatus & 0x1F; | |
1647 | ||
1648 | if (!event) { | |
1649 | /* this packet hasn't come in yet; we are done for now */ | |
1650 | goto out; | |
1651 | } | |
1652 | ||
1653 | if (event == 0x11) { | |
1654 | /* packet received successfully! */ | |
1655 | ||
1656 | /* rescount is the number of bytes *remaining* in the packet buffer, | |
1657 | after the packet was written */ | |
1658 | packet_len = recv->buf_stride - rescount; | |
1659 | ||
1660 | } else if (event == 0x02) { | |
1661 | PRINT(KERN_ERR, "IR DMA error - packet too long for buffer\n"); | |
1662 | } else if (event) { | |
1663 | PRINT(KERN_ERR, "IR DMA error - OHCI error code 0x%02x\n", event); | |
1664 | } | |
1665 | ||
1666 | /* sync our view of the buffer */ | |
1667 | dma_region_sync_for_cpu(&iso->data_buf, iso->pkt_dma * recv->buf_stride, recv->buf_stride); | |
1668 | ||
1669 | /* record the per-packet info */ | |
1670 | { | |
1671 | /* iso header is 8 bytes ahead of the data payload */ | |
1672 | unsigned char *hdr; | |
1673 | ||
1674 | unsigned int offset; | |
1675 | unsigned short cycle; | |
1676 | unsigned char channel, tag, sy; | |
1677 | ||
1678 | offset = iso->pkt_dma * recv->buf_stride; | |
1679 | hdr = iso->data_buf.kvirt + offset; | |
1680 | ||
1681 | /* skip iso header */ | |
1682 | offset += 8; | |
1683 | packet_len -= 8; | |
1684 | ||
1685 | cycle = (hdr[0] | (hdr[1] << 8)) & 0x1FFF; | |
1686 | channel = hdr[5] & 0x3F; | |
1687 | tag = hdr[5] >> 6; | |
1688 | sy = hdr[4] & 0xF; | |
1689 | ||
1934b8b6 BC |
1690 | hpsb_iso_packet_received(iso, offset, packet_len, |
1691 | recv->buf_stride, cycle, channel, tag, sy); | |
1da177e4 LT |
1692 | } |
1693 | ||
1694 | /* reset the DMA descriptor */ | |
1695 | il->status = recv->buf_stride; | |
1696 | ||
1697 | wake = 1; | |
1698 | recv->block_dma = iso->pkt_dma; | |
1699 | } | |
1700 | ||
1701 | out: | |
1702 | if (wake) | |
1703 | hpsb_iso_wake(iso); | |
1704 | } | |
1705 | ||
1706 | static void ohci_iso_recv_task(unsigned long data) | |
1707 | { | |
1708 | struct hpsb_iso *iso = (struct hpsb_iso*) data; | |
1709 | struct ohci_iso_recv *recv = iso->hostdata; | |
1710 | ||
1711 | if (recv->dma_mode == BUFFER_FILL_MODE) | |
1712 | ohci_iso_recv_bufferfill_task(iso, recv); | |
1713 | else | |
1714 | ohci_iso_recv_packetperbuf_task(iso, recv); | |
1715 | } | |
1716 | ||
1717 | /*********************************** | |
1718 | * rawiso ISO transmission * | |
1719 | ***********************************/ | |
1720 | ||
1721 | struct ohci_iso_xmit { | |
1722 | struct ti_ohci *ohci; | |
1723 | struct dma_prog_region prog; | |
1724 | struct ohci1394_iso_tasklet task; | |
1725 | int task_active; | |
cc9429bc PP |
1726 | int last_cycle; |
1727 | atomic_t skips; | |
1da177e4 LT |
1728 | |
1729 | u32 ContextControlSet; | |
1730 | u32 ContextControlClear; | |
1731 | u32 CommandPtr; | |
1732 | }; | |
1733 | ||
1734 | /* transmission DMA program: | |
1735 | one OUTPUT_MORE_IMMEDIATE for the IT header | |
1736 | one OUTPUT_LAST for the buffer data */ | |
1737 | ||
1738 | struct iso_xmit_cmd { | |
1739 | struct dma_cmd output_more_immediate; | |
1740 | u8 iso_hdr[8]; | |
1741 | u32 unused[2]; | |
1742 | struct dma_cmd output_last; | |
1743 | }; | |
1744 | ||
1745 | static int ohci_iso_xmit_init(struct hpsb_iso *iso); | |
1746 | static int ohci_iso_xmit_start(struct hpsb_iso *iso, int cycle); | |
1747 | static void ohci_iso_xmit_shutdown(struct hpsb_iso *iso); | |
1748 | static void ohci_iso_xmit_task(unsigned long data); | |
1749 | ||
1750 | static int ohci_iso_xmit_init(struct hpsb_iso *iso) | |
1751 | { | |
1752 | struct ohci_iso_xmit *xmit; | |
1753 | unsigned int prog_size; | |
1754 | int ctx; | |
1755 | int ret = -ENOMEM; | |
1756 | ||
e94b1766 | 1757 | xmit = kmalloc(sizeof(*xmit), GFP_KERNEL); |
1da177e4 LT |
1758 | if (!xmit) |
1759 | return -ENOMEM; | |
1760 | ||
1761 | iso->hostdata = xmit; | |
1762 | xmit->ohci = iso->host->hostdata; | |
1763 | xmit->task_active = 0; | |
cc9429bc PP |
1764 | xmit->last_cycle = -1; |
1765 | atomic_set(&iso->skips, 0); | |
1da177e4 LT |
1766 | |
1767 | dma_prog_region_init(&xmit->prog); | |
1768 | ||
1769 | prog_size = sizeof(struct iso_xmit_cmd) * iso->buf_packets; | |
1770 | ||
1771 | if (dma_prog_region_alloc(&xmit->prog, prog_size, xmit->ohci->dev)) | |
1772 | goto err; | |
1773 | ||
1774 | ohci1394_init_iso_tasklet(&xmit->task, OHCI_ISO_TRANSMIT, | |
1775 | ohci_iso_xmit_task, (unsigned long) iso); | |
1776 | ||
e4ec0f23 JM |
1777 | if (ohci1394_register_iso_tasklet(xmit->ohci, &xmit->task) < 0) { |
1778 | ret = -EBUSY; | |
1da177e4 | 1779 | goto err; |
e4ec0f23 | 1780 | } |
1da177e4 LT |
1781 | |
1782 | xmit->task_active = 1; | |
1783 | ||
1784 | /* xmit context registers are spaced 16 bytes apart */ | |
1785 | ctx = xmit->task.context; | |
1786 | xmit->ContextControlSet = OHCI1394_IsoXmitContextControlSet + 16 * ctx; | |
1787 | xmit->ContextControlClear = OHCI1394_IsoXmitContextControlClear + 16 * ctx; | |
1788 | xmit->CommandPtr = OHCI1394_IsoXmitCommandPtr + 16 * ctx; | |
1789 | ||
1790 | return 0; | |
1791 | ||
1792 | err: | |
1793 | ohci_iso_xmit_shutdown(iso); | |
1794 | return ret; | |
1795 | } | |
1796 | ||
1797 | static void ohci_iso_xmit_stop(struct hpsb_iso *iso) | |
1798 | { | |
1799 | struct ohci_iso_xmit *xmit = iso->hostdata; | |
1800 | struct ti_ohci *ohci = xmit->ohci; | |
1801 | ||
1802 | /* disable interrupts */ | |
1803 | reg_write(xmit->ohci, OHCI1394_IsoXmitIntMaskClear, 1 << xmit->task.context); | |
1804 | ||
1805 | /* halt DMA */ | |
1806 | if (ohci1394_stop_context(xmit->ohci, xmit->ContextControlClear, NULL)) { | |
1807 | /* XXX the DMA context will lock up if you try to send too much data! */ | |
1808 | PRINT(KERN_ERR, | |
1809 | "you probably exceeded the OHCI card's bandwidth limit - " | |
1810 | "reload the module and reduce xmit bandwidth"); | |
1811 | } | |
1812 | } | |
1813 | ||
1814 | static void ohci_iso_xmit_shutdown(struct hpsb_iso *iso) | |
1815 | { | |
1816 | struct ohci_iso_xmit *xmit = iso->hostdata; | |
1817 | ||
1818 | if (xmit->task_active) { | |
1819 | ohci_iso_xmit_stop(iso); | |
1820 | ohci1394_unregister_iso_tasklet(xmit->ohci, &xmit->task); | |
1821 | xmit->task_active = 0; | |
1822 | } | |
1823 | ||
1824 | dma_prog_region_free(&xmit->prog); | |
1825 | kfree(xmit); | |
1826 | iso->hostdata = NULL; | |
1827 | } | |
1828 | ||
1829 | static void ohci_iso_xmit_task(unsigned long data) | |
1830 | { | |
1831 | struct hpsb_iso *iso = (struct hpsb_iso*) data; | |
1832 | struct ohci_iso_xmit *xmit = iso->hostdata; | |
1833 | struct ti_ohci *ohci = xmit->ohci; | |
1834 | int wake = 0; | |
1835 | int count; | |
1836 | ||
1837 | /* check the whole buffer if necessary, starting at pkt_dma */ | |
1838 | for (count = 0; count < iso->buf_packets; count++) { | |
1839 | int cycle; | |
1840 | ||
1841 | /* DMA descriptor */ | |
1842 | struct iso_xmit_cmd *cmd = dma_region_i(&xmit->prog, struct iso_xmit_cmd, iso->pkt_dma); | |
1843 | ||
1844 | /* check for new writes to xferStatus */ | |
1845 | u16 xferstatus = le32_to_cpu(cmd->output_last.status) >> 16; | |
1846 | u8 event = xferstatus & 0x1F; | |
1847 | ||
1848 | if (!event) { | |
1849 | /* packet hasn't been sent yet; we are done for now */ | |
1850 | break; | |
1851 | } | |
1852 | ||
1853 | if (event != 0x11) | |
1854 | PRINT(KERN_ERR, | |
1855 | "IT DMA error - OHCI error code 0x%02x\n", event); | |
1856 | ||
1857 | /* at least one packet went out, so wake up the writer */ | |
1858 | wake = 1; | |
1859 | ||
1860 | /* parse cycle */ | |
1861 | cycle = le32_to_cpu(cmd->output_last.status) & 0x1FFF; | |
1862 | ||
cc9429bc PP |
1863 | if (xmit->last_cycle > -1) { |
1864 | int cycle_diff = cycle - xmit->last_cycle; | |
1865 | int skip; | |
1866 | ||
1867 | /* unwrap */ | |
1868 | if (cycle_diff < 0) { | |
1869 | cycle_diff += 8000; | |
1870 | if (cycle_diff < 0) | |
1871 | PRINT(KERN_ERR, "bogus cycle diff %d\n", | |
1872 | cycle_diff); | |
1873 | } | |
1874 | ||
1875 | skip = cycle_diff - 1; | |
1876 | if (skip > 0) { | |
1877 | DBGMSG("skipped %d cycles without packet loss", skip); | |
1878 | atomic_add(skip, &iso->skips); | |
1879 | } | |
1880 | } | |
1881 | xmit->last_cycle = cycle; | |
1882 | ||
1da177e4 LT |
1883 | /* tell the subsystem the packet has gone out */ |
1884 | hpsb_iso_packet_sent(iso, cycle, event != 0x11); | |
1885 | ||
1886 | /* reset the DMA descriptor for next time */ | |
1887 | cmd->output_last.status = 0; | |
1888 | } | |
1889 | ||
1890 | if (wake) | |
1891 | hpsb_iso_wake(iso); | |
1892 | } | |
1893 | ||
1894 | static int ohci_iso_xmit_queue(struct hpsb_iso *iso, struct hpsb_iso_packet_info *info) | |
1895 | { | |
1896 | struct ohci_iso_xmit *xmit = iso->hostdata; | |
1897 | struct ti_ohci *ohci = xmit->ohci; | |
1898 | ||
1899 | int next_i, prev_i; | |
1900 | struct iso_xmit_cmd *next, *prev; | |
1901 | ||
1902 | unsigned int offset; | |
1903 | unsigned short len; | |
1904 | unsigned char tag, sy; | |
1905 | ||
1906 | /* check that the packet doesn't cross a page boundary | |
1907 | (we could allow this if we added OUTPUT_MORE descriptor support) */ | |
1908 | if (cross_bound(info->offset, info->len)) { | |
1909 | PRINT(KERN_ERR, | |
1910 | "rawiso xmit: packet %u crosses a page boundary", | |
1911 | iso->first_packet); | |
1912 | return -EINVAL; | |
1913 | } | |
1914 | ||
1915 | offset = info->offset; | |
1916 | len = info->len; | |
1917 | tag = info->tag; | |
1918 | sy = info->sy; | |
1919 | ||
1920 | /* sync up the card's view of the buffer */ | |
1921 | dma_region_sync_for_device(&iso->data_buf, offset, len); | |
1922 | ||
1923 | /* append first_packet to the DMA chain */ | |
1924 | /* by linking the previous descriptor to it */ | |
1925 | /* (next will become the new end of the DMA chain) */ | |
1926 | ||
1927 | next_i = iso->first_packet; | |
1928 | prev_i = (next_i == 0) ? (iso->buf_packets - 1) : (next_i - 1); | |
1929 | ||
1930 | next = dma_region_i(&xmit->prog, struct iso_xmit_cmd, next_i); | |
1931 | prev = dma_region_i(&xmit->prog, struct iso_xmit_cmd, prev_i); | |
1932 | ||
1933 | /* set up the OUTPUT_MORE_IMMEDIATE descriptor */ | |
1934 | memset(next, 0, sizeof(struct iso_xmit_cmd)); | |
1935 | next->output_more_immediate.control = cpu_to_le32(0x02000008); | |
1936 | ||
1937 | /* ISO packet header is embedded in the OUTPUT_MORE_IMMEDIATE */ | |
1938 | ||
1939 | /* tcode = 0xA, and sy */ | |
1940 | next->iso_hdr[0] = 0xA0 | (sy & 0xF); | |
1941 | ||
1942 | /* tag and channel number */ | |
1943 | next->iso_hdr[1] = (tag << 6) | (iso->channel & 0x3F); | |
1944 | ||
1945 | /* transmission speed */ | |
1946 | next->iso_hdr[2] = iso->speed & 0x7; | |
1947 | ||
1948 | /* payload size */ | |
1949 | next->iso_hdr[6] = len & 0xFF; | |
1950 | next->iso_hdr[7] = len >> 8; | |
1951 | ||
1952 | /* set up the OUTPUT_LAST */ | |
1953 | next->output_last.control = cpu_to_le32(1 << 28); | |
1954 | next->output_last.control |= cpu_to_le32(1 << 27); /* update timeStamp */ | |
1955 | next->output_last.control |= cpu_to_le32(3 << 20); /* want interrupt */ | |
1956 | next->output_last.control |= cpu_to_le32(3 << 18); /* enable branch */ | |
1957 | next->output_last.control |= cpu_to_le32(len); | |
1958 | ||
1959 | /* payload bus address */ | |
1960 | next->output_last.address = cpu_to_le32(dma_region_offset_to_bus(&iso->data_buf, offset)); | |
1961 | ||
1962 | /* leave branchAddress at zero for now */ | |
1963 | ||
1964 | /* re-write the previous DMA descriptor to chain to this one */ | |
1965 | ||
1966 | /* set prev branch address to point to next (Z=3) */ | |
1967 | prev->output_last.branchAddress = cpu_to_le32( | |
1968 | dma_prog_region_offset_to_bus(&xmit->prog, sizeof(struct iso_xmit_cmd) * next_i) | 3); | |
1969 | ||
cc9429bc PP |
1970 | /* |
1971 | * Link the skip address to this descriptor itself. This causes a | |
1972 | * context to skip a cycle whenever lost cycles or FIFO overruns occur, | |
1973 | * without dropping the data at that point the application should then | |
1974 | * decide whether this is an error condition or not. Some protocols | |
1975 | * can deal with this by dropping some rate-matching padding packets. | |
1976 | */ | |
1977 | next->output_more_immediate.branchAddress = | |
1978 | prev->output_last.branchAddress; | |
1979 | ||
1da177e4 LT |
1980 | /* disable interrupt, unless required by the IRQ interval */ |
1981 | if (prev_i % iso->irq_interval) { | |
1982 | prev->output_last.control &= cpu_to_le32(~(3 << 20)); /* no interrupt */ | |
1983 | } else { | |
1984 | prev->output_last.control |= cpu_to_le32(3 << 20); /* enable interrupt */ | |
1985 | } | |
1986 | ||
1987 | wmb(); | |
1988 | ||
1989 | /* wake DMA in case it is sleeping */ | |
1990 | reg_write(xmit->ohci, xmit->ContextControlSet, 1 << 12); | |
1991 | ||
1992 | /* issue a dummy read of the cycle timer to force all PCI | |
1993 | writes to be posted immediately */ | |
1994 | mb(); | |
1995 | reg_read(xmit->ohci, OHCI1394_IsochronousCycleTimer); | |
1996 | ||
1997 | return 0; | |
1998 | } | |
1999 | ||
2000 | static int ohci_iso_xmit_start(struct hpsb_iso *iso, int cycle) | |
2001 | { | |
2002 | struct ohci_iso_xmit *xmit = iso->hostdata; | |
2003 | struct ti_ohci *ohci = xmit->ohci; | |
2004 | ||
2005 | /* clear out the control register */ | |
2006 | reg_write(xmit->ohci, xmit->ContextControlClear, 0xFFFFFFFF); | |
2007 | wmb(); | |
2008 | ||
2009 | /* address and length of first descriptor block (Z=3) */ | |
2010 | reg_write(xmit->ohci, xmit->CommandPtr, | |
2011 | dma_prog_region_offset_to_bus(&xmit->prog, iso->pkt_dma * sizeof(struct iso_xmit_cmd)) | 3); | |
2012 | ||
2013 | /* cycle match */ | |
2014 | if (cycle != -1) { | |
2015 | u32 start = cycle & 0x1FFF; | |
2016 | ||
2017 | /* 'cycle' is only mod 8000, but we also need two 'seconds' bits - | |
2018 | just snarf them from the current time */ | |
2019 | u32 seconds = reg_read(xmit->ohci, OHCI1394_IsochronousCycleTimer) >> 25; | |
2020 | ||
2021 | /* advance one second to give some extra time for DMA to start */ | |
2022 | seconds += 1; | |
2023 | ||
2024 | start |= (seconds & 3) << 13; | |
2025 | ||
2026 | reg_write(xmit->ohci, xmit->ContextControlSet, 0x80000000 | (start << 16)); | |
2027 | } | |
2028 | ||
2029 | /* enable interrupts */ | |
2030 | reg_write(xmit->ohci, OHCI1394_IsoXmitIntMaskSet, 1 << xmit->task.context); | |
2031 | ||
2032 | /* run */ | |
2033 | reg_write(xmit->ohci, xmit->ContextControlSet, 0x8000); | |
2034 | mb(); | |
2035 | ||
2036 | /* wait 100 usec to give the card time to go active */ | |
2037 | udelay(100); | |
2038 | ||
2039 | /* check the RUN bit */ | |
2040 | if (!(reg_read(xmit->ohci, xmit->ContextControlSet) & 0x8000)) { | |
2041 | PRINT(KERN_ERR, "Error starting IT DMA (ContextControl 0x%08x)\n", | |
2042 | reg_read(xmit->ohci, xmit->ContextControlSet)); | |
2043 | return -1; | |
2044 | } | |
2045 | ||
2046 | return 0; | |
2047 | } | |
2048 | ||
2049 | static int ohci_isoctl(struct hpsb_iso *iso, enum isoctl_cmd cmd, unsigned long arg) | |
2050 | { | |
2051 | ||
2052 | switch(cmd) { | |
2053 | case XMIT_INIT: | |
2054 | return ohci_iso_xmit_init(iso); | |
2055 | case XMIT_START: | |
2056 | return ohci_iso_xmit_start(iso, arg); | |
2057 | case XMIT_STOP: | |
2058 | ohci_iso_xmit_stop(iso); | |
2059 | return 0; | |
2060 | case XMIT_QUEUE: | |
2061 | return ohci_iso_xmit_queue(iso, (struct hpsb_iso_packet_info*) arg); | |
2062 | case XMIT_SHUTDOWN: | |
2063 | ohci_iso_xmit_shutdown(iso); | |
2064 | return 0; | |
2065 | ||
2066 | case RECV_INIT: | |
2067 | return ohci_iso_recv_init(iso); | |
2068 | case RECV_START: { | |
2069 | int *args = (int*) arg; | |
2070 | return ohci_iso_recv_start(iso, args[0], args[1], args[2]); | |
2071 | } | |
2072 | case RECV_STOP: | |
2073 | ohci_iso_recv_stop(iso); | |
2074 | return 0; | |
2075 | case RECV_RELEASE: | |
2076 | ohci_iso_recv_release(iso, (struct hpsb_iso_packet_info*) arg); | |
2077 | return 0; | |
2078 | case RECV_FLUSH: | |
2079 | ohci_iso_recv_task((unsigned long) iso); | |
2080 | return 0; | |
2081 | case RECV_SHUTDOWN: | |
2082 | ohci_iso_recv_shutdown(iso); | |
2083 | return 0; | |
2084 | case RECV_LISTEN_CHANNEL: | |
2085 | ohci_iso_recv_change_channel(iso, arg, 1); | |
2086 | return 0; | |
2087 | case RECV_UNLISTEN_CHANNEL: | |
2088 | ohci_iso_recv_change_channel(iso, arg, 0); | |
2089 | return 0; | |
2090 | case RECV_SET_CHANNEL_MASK: | |
2091 | ohci_iso_recv_set_channel_mask(iso, *((u64*) arg)); | |
2092 | return 0; | |
2093 | ||
2094 | default: | |
2095 | PRINT_G(KERN_ERR, "ohci_isoctl cmd %d not implemented yet", | |
2096 | cmd); | |
2097 | break; | |
2098 | } | |
2099 | return -EINVAL; | |
2100 | } | |
2101 | ||
2102 | /*************************************** | |
2103 | * IEEE-1394 functionality section END * | |
2104 | ***************************************/ | |
2105 | ||
2106 | ||
2107 | /******************************************************** | |
2108 | * Global stuff (interrupt handler, init/shutdown code) * | |
2109 | ********************************************************/ | |
2110 | ||
2111 | static void dma_trm_reset(struct dma_trm_ctx *d) | |
2112 | { | |
2113 | unsigned long flags; | |
2114 | LIST_HEAD(packet_list); | |
2115 | struct ti_ohci *ohci = d->ohci; | |
2116 | struct hpsb_packet *packet, *ptmp; | |
2117 | ||
2118 | ohci1394_stop_context(ohci, d->ctrlClear, NULL); | |
2119 | ||
2120 | /* Lock the context, reset it and release it. Move the packets | |
2121 | * that were pending in the context to packet_list and free | |
2122 | * them after releasing the lock. */ | |
2123 | ||
2124 | spin_lock_irqsave(&d->lock, flags); | |
2125 | ||
e351c4d0 RD |
2126 | list_splice_init(&d->fifo_list, &packet_list); |
2127 | list_splice_init(&d->pending_list, &packet_list); | |
1da177e4 LT |
2128 | |
2129 | d->branchAddrPtr = NULL; | |
2130 | d->sent_ind = d->prg_ind; | |
2131 | d->free_prgs = d->num_desc; | |
2132 | ||
2133 | spin_unlock_irqrestore(&d->lock, flags); | |
2134 | ||
2135 | if (list_empty(&packet_list)) | |
2136 | return; | |
2137 | ||
2138 | PRINT(KERN_INFO, "AT dma reset ctx=%d, aborting transmission", d->ctx); | |
2139 | ||
2140 | /* Now process subsystem callbacks for the packets from this | |
2141 | * context. */ | |
2142 | list_for_each_entry_safe(packet, ptmp, &packet_list, driver_list) { | |
2143 | list_del_init(&packet->driver_list); | |
2144 | hpsb_packet_sent(ohci->host, packet, ACKX_ABORTED); | |
2145 | } | |
2146 | } | |
2147 | ||
2148 | static void ohci_schedule_iso_tasklets(struct ti_ohci *ohci, | |
2149 | quadlet_t rx_event, | |
2150 | quadlet_t tx_event) | |
2151 | { | |
2152 | struct ohci1394_iso_tasklet *t; | |
2153 | unsigned long mask; | |
4a9949d7 | 2154 | unsigned long flags; |
1da177e4 | 2155 | |
4a9949d7 | 2156 | spin_lock_irqsave(&ohci->iso_tasklet_list_lock, flags); |
1da177e4 LT |
2157 | |
2158 | list_for_each_entry(t, &ohci->iso_tasklet_list, link) { | |
2159 | mask = 1 << t->context; | |
2160 | ||
85c5798b SR |
2161 | if (t->type == OHCI_ISO_TRANSMIT) { |
2162 | if (tx_event & mask) | |
2163 | tasklet_schedule(&t->tasklet); | |
2164 | } else { | |
2165 | /* OHCI_ISO_RECEIVE or OHCI_ISO_MULTICHANNEL_RECEIVE */ | |
2166 | if (rx_event & mask) | |
2167 | tasklet_schedule(&t->tasklet); | |
2168 | } | |
1da177e4 LT |
2169 | } |
2170 | ||
4a9949d7 | 2171 | spin_unlock_irqrestore(&ohci->iso_tasklet_list_lock, flags); |
1da177e4 LT |
2172 | } |
2173 | ||
7d12e780 | 2174 | static irqreturn_t ohci_irq_handler(int irq, void *dev_id) |
1da177e4 LT |
2175 | { |
2176 | quadlet_t event, node_id; | |
2177 | struct ti_ohci *ohci = (struct ti_ohci *)dev_id; | |
2178 | struct hpsb_host *host = ohci->host; | |
2179 | int phyid = -1, isroot = 0; | |
2180 | unsigned long flags; | |
2181 | ||
2182 | /* Read and clear the interrupt event register. Don't clear | |
2183 | * the busReset event, though. This is done when we get the | |
2184 | * selfIDComplete interrupt. */ | |
2185 | spin_lock_irqsave(&ohci->event_lock, flags); | |
2186 | event = reg_read(ohci, OHCI1394_IntEventClear); | |
2187 | reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset); | |
2188 | spin_unlock_irqrestore(&ohci->event_lock, flags); | |
2189 | ||
2190 | if (!event) | |
2191 | return IRQ_NONE; | |
2192 | ||
2193 | /* If event is ~(u32)0 cardbus card was ejected. In this case | |
2194 | * we just return, and clean up in the ohci1394_pci_remove | |
2195 | * function. */ | |
2196 | if (event == ~(u32) 0) { | |
2197 | DBGMSG("Device removed."); | |
2198 | return IRQ_NONE; | |
2199 | } | |
2200 | ||
2201 | DBGMSG("IntEvent: %08x", event); | |
2202 | ||
2203 | if (event & OHCI1394_unrecoverableError) { | |
2204 | int ctx; | |
2205 | PRINT(KERN_ERR, "Unrecoverable error!"); | |
2206 | ||
2207 | if (reg_read(ohci, OHCI1394_AsReqTrContextControlSet) & 0x800) | |
2208 | PRINT(KERN_ERR, "Async Req Tx Context died: " | |
2209 | "ctrl[%08x] cmdptr[%08x]", | |
2210 | reg_read(ohci, OHCI1394_AsReqTrContextControlSet), | |
2211 | reg_read(ohci, OHCI1394_AsReqTrCommandPtr)); | |
2212 | ||
2213 | if (reg_read(ohci, OHCI1394_AsRspTrContextControlSet) & 0x800) | |
2214 | PRINT(KERN_ERR, "Async Rsp Tx Context died: " | |
2215 | "ctrl[%08x] cmdptr[%08x]", | |
2216 | reg_read(ohci, OHCI1394_AsRspTrContextControlSet), | |
2217 | reg_read(ohci, OHCI1394_AsRspTrCommandPtr)); | |
2218 | ||
2219 | if (reg_read(ohci, OHCI1394_AsReqRcvContextControlSet) & 0x800) | |
2220 | PRINT(KERN_ERR, "Async Req Rcv Context died: " | |
2221 | "ctrl[%08x] cmdptr[%08x]", | |
2222 | reg_read(ohci, OHCI1394_AsReqRcvContextControlSet), | |
2223 | reg_read(ohci, OHCI1394_AsReqRcvCommandPtr)); | |
2224 | ||
2225 | if (reg_read(ohci, OHCI1394_AsRspRcvContextControlSet) & 0x800) | |
2226 | PRINT(KERN_ERR, "Async Rsp Rcv Context died: " | |
2227 | "ctrl[%08x] cmdptr[%08x]", | |
2228 | reg_read(ohci, OHCI1394_AsRspRcvContextControlSet), | |
2229 | reg_read(ohci, OHCI1394_AsRspRcvCommandPtr)); | |
2230 | ||
2231 | for (ctx = 0; ctx < ohci->nb_iso_xmit_ctx; ctx++) { | |
2232 | if (reg_read(ohci, OHCI1394_IsoXmitContextControlSet + (16 * ctx)) & 0x800) | |
2233 | PRINT(KERN_ERR, "Iso Xmit %d Context died: " | |
2234 | "ctrl[%08x] cmdptr[%08x]", ctx, | |
2235 | reg_read(ohci, OHCI1394_IsoXmitContextControlSet + (16 * ctx)), | |
2236 | reg_read(ohci, OHCI1394_IsoXmitCommandPtr + (16 * ctx))); | |
2237 | } | |
2238 | ||
2239 | for (ctx = 0; ctx < ohci->nb_iso_rcv_ctx; ctx++) { | |
2240 | if (reg_read(ohci, OHCI1394_IsoRcvContextControlSet + (32 * ctx)) & 0x800) | |
2241 | PRINT(KERN_ERR, "Iso Recv %d Context died: " | |
2242 | "ctrl[%08x] cmdptr[%08x] match[%08x]", ctx, | |
2243 | reg_read(ohci, OHCI1394_IsoRcvContextControlSet + (32 * ctx)), | |
2244 | reg_read(ohci, OHCI1394_IsoRcvCommandPtr + (32 * ctx)), | |
2245 | reg_read(ohci, OHCI1394_IsoRcvContextMatch + (32 * ctx))); | |
2246 | } | |
2247 | ||
2248 | event &= ~OHCI1394_unrecoverableError; | |
2249 | } | |
e2f8165d JM |
2250 | if (event & OHCI1394_postedWriteErr) { |
2251 | PRINT(KERN_ERR, "physical posted write error"); | |
2252 | /* no recovery strategy yet, had to involve protocol drivers */ | |
c13596b0 | 2253 | event &= ~OHCI1394_postedWriteErr; |
e2f8165d | 2254 | } |
57fdb58f BC |
2255 | if (event & OHCI1394_cycleTooLong) { |
2256 | if(printk_ratelimit()) | |
2257 | PRINT(KERN_WARNING, "isochronous cycle too long"); | |
2258 | else | |
2259 | DBGMSG("OHCI1394_cycleTooLong"); | |
2260 | reg_write(ohci, OHCI1394_LinkControlSet, | |
2261 | OHCI1394_LinkControl_CycleMaster); | |
2262 | event &= ~OHCI1394_cycleTooLong; | |
2263 | } | |
1da177e4 LT |
2264 | if (event & OHCI1394_cycleInconsistent) { |
2265 | /* We subscribe to the cycleInconsistent event only to | |
2266 | * clear the corresponding event bit... otherwise, | |
2267 | * isochronous cycleMatch DMA won't work. */ | |
2268 | DBGMSG("OHCI1394_cycleInconsistent"); | |
2269 | event &= ~OHCI1394_cycleInconsistent; | |
2270 | } | |
1da177e4 LT |
2271 | if (event & OHCI1394_busReset) { |
2272 | /* The busReset event bit can't be cleared during the | |
2273 | * selfID phase, so we disable busReset interrupts, to | |
2274 | * avoid burying the cpu in interrupt requests. */ | |
2275 | spin_lock_irqsave(&ohci->event_lock, flags); | |
2276 | reg_write(ohci, OHCI1394_IntMaskClear, OHCI1394_busReset); | |
2277 | ||
2278 | if (ohci->check_busreset) { | |
2279 | int loop_count = 0; | |
2280 | ||
2281 | udelay(10); | |
2282 | ||
2283 | while (reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) { | |
2284 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); | |
2285 | ||
2286 | spin_unlock_irqrestore(&ohci->event_lock, flags); | |
2287 | udelay(10); | |
2288 | spin_lock_irqsave(&ohci->event_lock, flags); | |
2289 | ||
2290 | /* The loop counter check is to prevent the driver | |
2291 | * from remaining in this state forever. For the | |
2292 | * initial bus reset, the loop continues for ever | |
2293 | * and the system hangs, until some device is plugged-in | |
2294 | * or out manually into a port! The forced reset seems | |
2295 | * to solve this problem. This mainly effects nForce2. */ | |
2296 | if (loop_count > 10000) { | |
2297 | ohci_devctl(host, RESET_BUS, LONG_RESET); | |
2298 | DBGMSG("Detected bus-reset loop. Forced a bus reset!"); | |
2299 | loop_count = 0; | |
2300 | } | |
2301 | ||
2302 | loop_count++; | |
2303 | } | |
2304 | } | |
2305 | spin_unlock_irqrestore(&ohci->event_lock, flags); | |
2306 | if (!host->in_bus_reset) { | |
2307 | DBGMSG("irq_handler: Bus reset requested"); | |
2308 | ||
2309 | /* Subsystem call */ | |
2310 | hpsb_bus_reset(ohci->host); | |
2311 | } | |
2312 | event &= ~OHCI1394_busReset; | |
2313 | } | |
1da177e4 LT |
2314 | if (event & OHCI1394_reqTxComplete) { |
2315 | struct dma_trm_ctx *d = &ohci->at_req_context; | |
2316 | DBGMSG("Got reqTxComplete interrupt " | |
2317 | "status=0x%08X", reg_read(ohci, d->ctrlSet)); | |
2318 | if (reg_read(ohci, d->ctrlSet) & 0x800) | |
2319 | ohci1394_stop_context(ohci, d->ctrlClear, | |
2320 | "reqTxComplete"); | |
2321 | else | |
2322 | dma_trm_tasklet((unsigned long)d); | |
2323 | //tasklet_schedule(&d->task); | |
2324 | event &= ~OHCI1394_reqTxComplete; | |
2325 | } | |
2326 | if (event & OHCI1394_respTxComplete) { | |
2327 | struct dma_trm_ctx *d = &ohci->at_resp_context; | |
2328 | DBGMSG("Got respTxComplete interrupt " | |
2329 | "status=0x%08X", reg_read(ohci, d->ctrlSet)); | |
2330 | if (reg_read(ohci, d->ctrlSet) & 0x800) | |
2331 | ohci1394_stop_context(ohci, d->ctrlClear, | |
2332 | "respTxComplete"); | |
2333 | else | |
2334 | tasklet_schedule(&d->task); | |
2335 | event &= ~OHCI1394_respTxComplete; | |
2336 | } | |
2337 | if (event & OHCI1394_RQPkt) { | |
2338 | struct dma_rcv_ctx *d = &ohci->ar_req_context; | |
2339 | DBGMSG("Got RQPkt interrupt status=0x%08X", | |
2340 | reg_read(ohci, d->ctrlSet)); | |
2341 | if (reg_read(ohci, d->ctrlSet) & 0x800) | |
2342 | ohci1394_stop_context(ohci, d->ctrlClear, "RQPkt"); | |
2343 | else | |
2344 | tasklet_schedule(&d->task); | |
2345 | event &= ~OHCI1394_RQPkt; | |
2346 | } | |
2347 | if (event & OHCI1394_RSPkt) { | |
2348 | struct dma_rcv_ctx *d = &ohci->ar_resp_context; | |
2349 | DBGMSG("Got RSPkt interrupt status=0x%08X", | |
2350 | reg_read(ohci, d->ctrlSet)); | |
2351 | if (reg_read(ohci, d->ctrlSet) & 0x800) | |
2352 | ohci1394_stop_context(ohci, d->ctrlClear, "RSPkt"); | |
2353 | else | |
2354 | tasklet_schedule(&d->task); | |
2355 | event &= ~OHCI1394_RSPkt; | |
2356 | } | |
2357 | if (event & OHCI1394_isochRx) { | |
2358 | quadlet_t rx_event; | |
2359 | ||
2360 | rx_event = reg_read(ohci, OHCI1394_IsoRecvIntEventSet); | |
2361 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, rx_event); | |
2362 | ohci_schedule_iso_tasklets(ohci, rx_event, 0); | |
2363 | event &= ~OHCI1394_isochRx; | |
2364 | } | |
2365 | if (event & OHCI1394_isochTx) { | |
2366 | quadlet_t tx_event; | |
2367 | ||
2368 | tx_event = reg_read(ohci, OHCI1394_IsoXmitIntEventSet); | |
2369 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, tx_event); | |
2370 | ohci_schedule_iso_tasklets(ohci, 0, tx_event); | |
2371 | event &= ~OHCI1394_isochTx; | |
2372 | } | |
2373 | if (event & OHCI1394_selfIDComplete) { | |
2374 | if (host->in_bus_reset) { | |
2375 | node_id = reg_read(ohci, OHCI1394_NodeID); | |
2376 | ||
2377 | if (!(node_id & 0x80000000)) { | |
2378 | PRINT(KERN_ERR, | |
2379 | "SelfID received, but NodeID invalid " | |
2380 | "(probably new bus reset occurred): %08X", | |
2381 | node_id); | |
2382 | goto selfid_not_valid; | |
2383 | } | |
2384 | ||
2385 | phyid = node_id & 0x0000003f; | |
2386 | isroot = (node_id & 0x40000000) != 0; | |
2387 | ||
2388 | DBGMSG("SelfID interrupt received " | |
2389 | "(phyid %d, %s)", phyid, | |
2390 | (isroot ? "root" : "not root")); | |
2391 | ||
2392 | handle_selfid(ohci, host, phyid, isroot); | |
2393 | ||
2394 | /* Clear the bus reset event and re-enable the | |
2395 | * busReset interrupt. */ | |
2396 | spin_lock_irqsave(&ohci->event_lock, flags); | |
2397 | reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); | |
2398 | reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset); | |
2399 | spin_unlock_irqrestore(&ohci->event_lock, flags); | |
2400 | ||
1da177e4 LT |
2401 | /* Turn on phys dma reception. |
2402 | * | |
2403 | * TODO: Enable some sort of filtering management. | |
2404 | */ | |
2405 | if (phys_dma) { | |
180a4304 SR |
2406 | reg_write(ohci, OHCI1394_PhyReqFilterHiSet, |
2407 | 0xffffffff); | |
2408 | reg_write(ohci, OHCI1394_PhyReqFilterLoSet, | |
2409 | 0xffffffff); | |
1da177e4 LT |
2410 | } |
2411 | ||
2412 | DBGMSG("PhyReqFilter=%08x%08x", | |
180a4304 SR |
2413 | reg_read(ohci, OHCI1394_PhyReqFilterHiSet), |
2414 | reg_read(ohci, OHCI1394_PhyReqFilterLoSet)); | |
1da177e4 LT |
2415 | |
2416 | hpsb_selfid_complete(host, phyid, isroot); | |
2417 | } else | |
2418 | PRINT(KERN_ERR, | |
2419 | "SelfID received outside of bus reset sequence"); | |
2420 | ||
2421 | selfid_not_valid: | |
2422 | event &= ~OHCI1394_selfIDComplete; | |
2423 | } | |
2424 | ||
2425 | /* Make sure we handle everything, just in case we accidentally | |
2426 | * enabled an interrupt that we didn't write a handler for. */ | |
2427 | if (event) | |
2428 | PRINT(KERN_ERR, "Unhandled interrupt(s) 0x%08x", | |
2429 | event); | |
2430 | ||
2431 | return IRQ_HANDLED; | |
2432 | } | |
2433 | ||
2434 | /* Put the buffer back into the dma context */ | |
2435 | static void insert_dma_buffer(struct dma_rcv_ctx *d, int idx) | |
2436 | { | |
2437 | struct ti_ohci *ohci = (struct ti_ohci*)(d->ohci); | |
2438 | DBGMSG("Inserting dma buf ctx=%d idx=%d", d->ctx, idx); | |
2439 | ||
2440 | d->prg_cpu[idx]->status = cpu_to_le32(d->buf_size); | |
2441 | d->prg_cpu[idx]->branchAddress &= le32_to_cpu(0xfffffff0); | |
2442 | idx = (idx + d->num_desc - 1 ) % d->num_desc; | |
2443 | d->prg_cpu[idx]->branchAddress |= le32_to_cpu(0x00000001); | |
2444 | ||
2445 | /* To avoid a race, ensure 1394 interface hardware sees the inserted | |
2446 | * context program descriptors before it sees the wakeup bit set. */ | |
2447 | wmb(); | |
2448 | ||
2449 | /* wake up the dma context if necessary */ | |
2450 | if (!(reg_read(ohci, d->ctrlSet) & 0x400)) { | |
2451 | PRINT(KERN_INFO, | |
2452 | "Waking dma ctx=%d ... processing is probably too slow", | |
2453 | d->ctx); | |
2454 | } | |
2455 | ||
2456 | /* do this always, to avoid race condition */ | |
2457 | reg_write(ohci, d->ctrlSet, 0x1000); | |
2458 | } | |
2459 | ||
2460 | #define cond_le32_to_cpu(data, noswap) \ | |
2461 | (noswap ? data : le32_to_cpu(data)) | |
2462 | ||
2463 | static const int TCODE_SIZE[16] = {20, 0, 16, -1, 16, 20, 20, 0, | |
2464 | -1, 0, -1, 0, -1, -1, 16, -1}; | |
2465 | ||
2466 | /* | |
2467 | * Determine the length of a packet in the buffer | |
2468 | * Optimization suggested by Pascal Drolet <pascal.drolet@informission.ca> | |
2469 | */ | |
2b01b80b SR |
2470 | static inline int packet_length(struct dma_rcv_ctx *d, int idx, |
2471 | quadlet_t *buf_ptr, int offset, | |
2472 | unsigned char tcode, int noswap) | |
1da177e4 LT |
2473 | { |
2474 | int length = -1; | |
2475 | ||
2476 | if (d->type == DMA_CTX_ASYNC_REQ || d->type == DMA_CTX_ASYNC_RESP) { | |
2477 | length = TCODE_SIZE[tcode]; | |
2478 | if (length == 0) { | |
2479 | if (offset + 12 >= d->buf_size) { | |
2480 | length = (cond_le32_to_cpu(d->buf_cpu[(idx + 1) % d->num_desc] | |
2481 | [3 - ((d->buf_size - offset) >> 2)], noswap) >> 16); | |
2482 | } else { | |
2483 | length = (cond_le32_to_cpu(buf_ptr[3], noswap) >> 16); | |
2484 | } | |
2485 | length += 20; | |
2486 | } | |
2487 | } else if (d->type == DMA_CTX_ISO) { | |
2488 | /* Assumption: buffer fill mode with header/trailer */ | |
2489 | length = (cond_le32_to_cpu(buf_ptr[0], noswap) >> 16) + 8; | |
2490 | } | |
2491 | ||
2492 | if (length > 0 && length % 4) | |
2493 | length += 4 - (length % 4); | |
2494 | ||
2495 | return length; | |
2496 | } | |
2497 | ||
2498 | /* Tasklet that processes dma receive buffers */ | |
2499 | static void dma_rcv_tasklet (unsigned long data) | |
2500 | { | |
2501 | struct dma_rcv_ctx *d = (struct dma_rcv_ctx*)data; | |
2502 | struct ti_ohci *ohci = (struct ti_ohci*)(d->ohci); | |
2503 | unsigned int split_left, idx, offset, rescount; | |
2504 | unsigned char tcode; | |
2505 | int length, bytes_left, ack; | |
2506 | unsigned long flags; | |
2507 | quadlet_t *buf_ptr; | |
2508 | char *split_ptr; | |
2509 | char msg[256]; | |
2510 | ||
2511 | spin_lock_irqsave(&d->lock, flags); | |
2512 | ||
2513 | idx = d->buf_ind; | |
2514 | offset = d->buf_offset; | |
2515 | buf_ptr = d->buf_cpu[idx] + offset/4; | |
2516 | ||
2517 | rescount = le32_to_cpu(d->prg_cpu[idx]->status) & 0xffff; | |
2518 | bytes_left = d->buf_size - rescount - offset; | |
2519 | ||
2520 | while (bytes_left > 0) { | |
2521 | tcode = (cond_le32_to_cpu(buf_ptr[0], ohci->no_swap_incoming) >> 4) & 0xf; | |
2522 | ||
2523 | /* packet_length() will return < 4 for an error */ | |
2524 | length = packet_length(d, idx, buf_ptr, offset, tcode, ohci->no_swap_incoming); | |
2525 | ||
2526 | if (length < 4) { /* something is wrong */ | |
2527 | sprintf(msg,"Unexpected tcode 0x%x(0x%08x) in AR ctx=%d, length=%d", | |
2528 | tcode, cond_le32_to_cpu(buf_ptr[0], ohci->no_swap_incoming), | |
2529 | d->ctx, length); | |
2530 | ohci1394_stop_context(ohci, d->ctrlClear, msg); | |
2531 | spin_unlock_irqrestore(&d->lock, flags); | |
2532 | return; | |
2533 | } | |
2534 | ||
2535 | /* The first case is where we have a packet that crosses | |
2536 | * over more than one descriptor. The next case is where | |
2537 | * it's all in the first descriptor. */ | |
2538 | if ((offset + length) > d->buf_size) { | |
2539 | DBGMSG("Split packet rcv'd"); | |
2540 | if (length > d->split_buf_size) { | |
2541 | ohci1394_stop_context(ohci, d->ctrlClear, | |
2542 | "Split packet size exceeded"); | |
2543 | d->buf_ind = idx; | |
2544 | d->buf_offset = offset; | |
2545 | spin_unlock_irqrestore(&d->lock, flags); | |
2546 | return; | |
2547 | } | |
2548 | ||
2549 | if (le32_to_cpu(d->prg_cpu[(idx+1)%d->num_desc]->status) | |
2550 | == d->buf_size) { | |
2551 | /* Other part of packet not written yet. | |
2552 | * this should never happen I think | |
2553 | * anyway we'll get it on the next call. */ | |
2554 | PRINT(KERN_INFO, | |
2555 | "Got only half a packet!"); | |
2556 | d->buf_ind = idx; | |
2557 | d->buf_offset = offset; | |
2558 | spin_unlock_irqrestore(&d->lock, flags); | |
2559 | return; | |
2560 | } | |
2561 | ||
2562 | split_left = length; | |
2563 | split_ptr = (char *)d->spb; | |
2564 | memcpy(split_ptr,buf_ptr,d->buf_size-offset); | |
2565 | split_left -= d->buf_size-offset; | |
2566 | split_ptr += d->buf_size-offset; | |
2567 | insert_dma_buffer(d, idx); | |
2568 | idx = (idx+1) % d->num_desc; | |
2569 | buf_ptr = d->buf_cpu[idx]; | |
2570 | offset=0; | |
2571 | ||
2572 | while (split_left >= d->buf_size) { | |
2573 | memcpy(split_ptr,buf_ptr,d->buf_size); | |
2574 | split_ptr += d->buf_size; | |
2575 | split_left -= d->buf_size; | |
2576 | insert_dma_buffer(d, idx); | |
2577 | idx = (idx+1) % d->num_desc; | |
2578 | buf_ptr = d->buf_cpu[idx]; | |
2579 | } | |
2580 | ||
2581 | if (split_left > 0) { | |
2582 | memcpy(split_ptr, buf_ptr, split_left); | |
2583 | offset = split_left; | |
2584 | buf_ptr += offset/4; | |
2585 | } | |
2586 | } else { | |
2587 | DBGMSG("Single packet rcv'd"); | |
2588 | memcpy(d->spb, buf_ptr, length); | |
2589 | offset += length; | |
2590 | buf_ptr += length/4; | |
2591 | if (offset==d->buf_size) { | |
2592 | insert_dma_buffer(d, idx); | |
2593 | idx = (idx+1) % d->num_desc; | |
2594 | buf_ptr = d->buf_cpu[idx]; | |
2595 | offset=0; | |
2596 | } | |
2597 | } | |
2598 | ||
2599 | /* We get one phy packet to the async descriptor for each | |
2600 | * bus reset. We always ignore it. */ | |
2601 | if (tcode != OHCI1394_TCODE_PHY) { | |
2602 | if (!ohci->no_swap_incoming) | |
9531f13a | 2603 | header_le32_to_cpu(d->spb, tcode); |
1da177e4 LT |
2604 | DBGMSG("Packet received from node" |
2605 | " %d ack=0x%02X spd=%d tcode=0x%X" | |
2606 | " length=%d ctx=%d tlabel=%d", | |
2607 | (d->spb[1]>>16)&0x3f, | |
2608 | (cond_le32_to_cpu(d->spb[length/4-1], ohci->no_swap_incoming)>>16)&0x1f, | |
2609 | (cond_le32_to_cpu(d->spb[length/4-1], ohci->no_swap_incoming)>>21)&0x3, | |
2610 | tcode, length, d->ctx, | |
cf82703d | 2611 | (d->spb[0]>>10)&0x3f); |
1da177e4 LT |
2612 | |
2613 | ack = (((cond_le32_to_cpu(d->spb[length/4-1], ohci->no_swap_incoming)>>16)&0x1f) | |
2614 | == 0x11) ? 1 : 0; | |
2615 | ||
2616 | hpsb_packet_received(ohci->host, d->spb, | |
2617 | length-4, ack); | |
2618 | } | |
2619 | #ifdef OHCI1394_DEBUG | |
2620 | else | |
2621 | PRINT (KERN_DEBUG, "Got phy packet ctx=%d ... discarded", | |
2622 | d->ctx); | |
2623 | #endif | |
2624 | ||
2625 | rescount = le32_to_cpu(d->prg_cpu[idx]->status) & 0xffff; | |
2626 | ||
2627 | bytes_left = d->buf_size - rescount - offset; | |
2628 | ||
2629 | } | |
2630 | ||
2631 | d->buf_ind = idx; | |
2632 | d->buf_offset = offset; | |
2633 | ||
2634 | spin_unlock_irqrestore(&d->lock, flags); | |
2635 | } | |
2636 | ||
2637 | /* Bottom half that processes sent packets */ | |
2638 | static void dma_trm_tasklet (unsigned long data) | |
2639 | { | |
2640 | struct dma_trm_ctx *d = (struct dma_trm_ctx*)data; | |
2641 | struct ti_ohci *ohci = (struct ti_ohci*)(d->ohci); | |
2642 | struct hpsb_packet *packet, *ptmp; | |
2643 | unsigned long flags; | |
2644 | u32 status, ack; | |
2645 | size_t datasize; | |
2646 | ||
2647 | spin_lock_irqsave(&d->lock, flags); | |
2648 | ||
2649 | list_for_each_entry_safe(packet, ptmp, &d->fifo_list, driver_list) { | |
2650 | datasize = packet->data_size; | |
2651 | if (datasize && packet->type != hpsb_raw) | |
2652 | status = le32_to_cpu( | |
2653 | d->prg_cpu[d->sent_ind]->end.status) >> 16; | |
2654 | else | |
2655 | status = le32_to_cpu( | |
2656 | d->prg_cpu[d->sent_ind]->begin.status) >> 16; | |
2657 | ||
2658 | if (status == 0) | |
2659 | /* this packet hasn't been sent yet*/ | |
2660 | break; | |
2661 | ||
2662 | #ifdef OHCI1394_DEBUG | |
2663 | if (datasize) | |
2664 | if (((le32_to_cpu(d->prg_cpu[d->sent_ind]->data[0])>>4)&0xf) == 0xa) | |
2665 | DBGMSG("Stream packet sent to channel %d tcode=0x%X " | |
2666 | "ack=0x%X spd=%d dataLength=%d ctx=%d", | |
2667 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[0])>>8)&0x3f, | |
2668 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[0])>>4)&0xf, | |
2669 | status&0x1f, (status>>5)&0x3, | |
2670 | le32_to_cpu(d->prg_cpu[d->sent_ind]->data[1])>>16, | |
2671 | d->ctx); | |
2672 | else | |
2673 | DBGMSG("Packet sent to node %d tcode=0x%X tLabel=" | |
dfe547ab | 2674 | "%d ack=0x%X spd=%d dataLength=%d ctx=%d", |
1da177e4 LT |
2675 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[1])>>16)&0x3f, |
2676 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[0])>>4)&0xf, | |
2677 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[0])>>10)&0x3f, | |
2678 | status&0x1f, (status>>5)&0x3, | |
2679 | le32_to_cpu(d->prg_cpu[d->sent_ind]->data[3])>>16, | |
2680 | d->ctx); | |
2681 | else | |
2682 | DBGMSG("Packet sent to node %d tcode=0x%X tLabel=" | |
dfe547ab | 2683 | "%d ack=0x%X spd=%d data=0x%08X ctx=%d", |
1da177e4 LT |
2684 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[1]) |
2685 | >>16)&0x3f, | |
2686 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[0]) | |
2687 | >>4)&0xf, | |
2688 | (le32_to_cpu(d->prg_cpu[d->sent_ind]->data[0]) | |
2689 | >>10)&0x3f, | |
2690 | status&0x1f, (status>>5)&0x3, | |
2691 | le32_to_cpu(d->prg_cpu[d->sent_ind]->data[3]), | |
2692 | d->ctx); | |
2693 | #endif | |
2694 | ||
2695 | if (status & 0x10) { | |
2696 | ack = status & 0xf; | |
2697 | } else { | |
2698 | switch (status & 0x1f) { | |
2699 | case EVT_NO_STATUS: /* that should never happen */ | |
2700 | case EVT_RESERVED_A: /* that should never happen */ | |
2701 | case EVT_LONG_PACKET: /* that should never happen */ | |
2702 | PRINT(KERN_WARNING, "Received OHCI evt_* error 0x%x", status & 0x1f); | |
2703 | ack = ACKX_SEND_ERROR; | |
2704 | break; | |
2705 | case EVT_MISSING_ACK: | |
2706 | ack = ACKX_TIMEOUT; | |
2707 | break; | |
2708 | case EVT_UNDERRUN: | |
2709 | ack = ACKX_SEND_ERROR; | |
2710 | break; | |
2711 | case EVT_OVERRUN: /* that should never happen */ | |
2712 | PRINT(KERN_WARNING, "Received OHCI evt_* error 0x%x", status & 0x1f); | |
2713 | ack = ACKX_SEND_ERROR; | |
2714 | break; | |
2715 | case EVT_DESCRIPTOR_READ: | |
2716 | case EVT_DATA_READ: | |
2717 | case EVT_DATA_WRITE: | |
2718 | ack = ACKX_SEND_ERROR; | |
2719 | break; | |
2720 | case EVT_BUS_RESET: /* that should never happen */ | |
2721 | PRINT(KERN_WARNING, "Received OHCI evt_* error 0x%x", status & 0x1f); | |
2722 | ack = ACKX_SEND_ERROR; | |
2723 | break; | |
2724 | case EVT_TIMEOUT: | |
2725 | ack = ACKX_TIMEOUT; | |
2726 | break; | |
2727 | case EVT_TCODE_ERR: | |
2728 | ack = ACKX_SEND_ERROR; | |
2729 | break; | |
2730 | case EVT_RESERVED_B: /* that should never happen */ | |
2731 | case EVT_RESERVED_C: /* that should never happen */ | |
2732 | PRINT(KERN_WARNING, "Received OHCI evt_* error 0x%x", status & 0x1f); | |
2733 | ack = ACKX_SEND_ERROR; | |
2734 | break; | |
2735 | case EVT_UNKNOWN: | |
2736 | case EVT_FLUSHED: | |
2737 | ack = ACKX_SEND_ERROR; | |
2738 | break; | |
2739 | default: | |
2740 | PRINT(KERN_ERR, "Unhandled OHCI evt_* error 0x%x", status & 0x1f); | |
2741 | ack = ACKX_SEND_ERROR; | |
2742 | BUG(); | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | list_del_init(&packet->driver_list); | |
2747 | hpsb_packet_sent(ohci->host, packet, ack); | |
2748 | ||
17a62486 | 2749 | if (datasize) |
1da177e4 LT |
2750 | pci_unmap_single(ohci->dev, |
2751 | cpu_to_le32(d->prg_cpu[d->sent_ind]->end.address), | |
2752 | datasize, PCI_DMA_TODEVICE); | |
1da177e4 LT |
2753 | |
2754 | d->sent_ind = (d->sent_ind+1)%d->num_desc; | |
2755 | d->free_prgs++; | |
2756 | } | |
2757 | ||
2758 | dma_trm_flush(ohci, d); | |
2759 | ||
2760 | spin_unlock_irqrestore(&d->lock, flags); | |
2761 | } | |
2762 | ||
1da177e4 LT |
2763 | static void free_dma_rcv_ctx(struct dma_rcv_ctx *d) |
2764 | { | |
2765 | int i; | |
2766 | struct ti_ohci *ohci = d->ohci; | |
2767 | ||
2768 | if (ohci == NULL) | |
2769 | return; | |
2770 | ||
2771 | DBGMSG("Freeing dma_rcv_ctx %d", d->ctx); | |
2772 | ||
2773 | if (d->buf_cpu) { | |
2774 | for (i=0; i<d->num_desc; i++) | |
17a62486 | 2775 | if (d->buf_cpu[i] && d->buf_bus[i]) |
1da177e4 LT |
2776 | pci_free_consistent( |
2777 | ohci->dev, d->buf_size, | |
2778 | d->buf_cpu[i], d->buf_bus[i]); | |
1da177e4 LT |
2779 | kfree(d->buf_cpu); |
2780 | kfree(d->buf_bus); | |
2781 | } | |
2782 | if (d->prg_cpu) { | |
2783 | for (i=0; i<d->num_desc; i++) | |
17a62486 SR |
2784 | if (d->prg_cpu[i] && d->prg_bus[i]) |
2785 | pci_pool_free(d->prg_pool, d->prg_cpu[i], | |
2786 | d->prg_bus[i]); | |
1da177e4 | 2787 | pci_pool_destroy(d->prg_pool); |
1da177e4 LT |
2788 | kfree(d->prg_cpu); |
2789 | kfree(d->prg_bus); | |
2790 | } | |
616b859f | 2791 | kfree(d->spb); |
1da177e4 LT |
2792 | |
2793 | /* Mark this context as freed. */ | |
2794 | d->ohci = NULL; | |
2795 | } | |
2796 | ||
2797 | static int | |
2798 | alloc_dma_rcv_ctx(struct ti_ohci *ohci, struct dma_rcv_ctx *d, | |
2799 | enum context_type type, int ctx, int num_desc, | |
2800 | int buf_size, int split_buf_size, int context_base) | |
2801 | { | |
2802 | int i, len; | |
2803 | static int num_allocs; | |
2804 | static char pool_name[20]; | |
2805 | ||
2806 | d->ohci = ohci; | |
2807 | d->type = type; | |
2808 | d->ctx = ctx; | |
2809 | ||
2810 | d->num_desc = num_desc; | |
2811 | d->buf_size = buf_size; | |
2812 | d->split_buf_size = split_buf_size; | |
2813 | ||
2814 | d->ctrlSet = 0; | |
2815 | d->ctrlClear = 0; | |
2816 | d->cmdPtr = 0; | |
2817 | ||
8551158a SR |
2818 | d->buf_cpu = kzalloc(d->num_desc * sizeof(*d->buf_cpu), GFP_ATOMIC); |
2819 | d->buf_bus = kzalloc(d->num_desc * sizeof(*d->buf_bus), GFP_ATOMIC); | |
1da177e4 LT |
2820 | |
2821 | if (d->buf_cpu == NULL || d->buf_bus == NULL) { | |
c4e2e02b | 2822 | PRINT(KERN_ERR, "Failed to allocate %s", "DMA buffer"); |
1da177e4 LT |
2823 | free_dma_rcv_ctx(d); |
2824 | return -ENOMEM; | |
2825 | } | |
1da177e4 | 2826 | |
8551158a SR |
2827 | d->prg_cpu = kzalloc(d->num_desc * sizeof(*d->prg_cpu), GFP_ATOMIC); |
2828 | d->prg_bus = kzalloc(d->num_desc * sizeof(*d->prg_bus), GFP_ATOMIC); | |
1da177e4 LT |
2829 | |
2830 | if (d->prg_cpu == NULL || d->prg_bus == NULL) { | |
c4e2e02b | 2831 | PRINT(KERN_ERR, "Failed to allocate %s", "DMA prg"); |
1da177e4 LT |
2832 | free_dma_rcv_ctx(d); |
2833 | return -ENOMEM; | |
2834 | } | |
1da177e4 LT |
2835 | |
2836 | d->spb = kmalloc(d->split_buf_size, GFP_ATOMIC); | |
2837 | ||
2838 | if (d->spb == NULL) { | |
c4e2e02b | 2839 | PRINT(KERN_ERR, "Failed to allocate %s", "split buffer"); |
1da177e4 LT |
2840 | free_dma_rcv_ctx(d); |
2841 | return -ENOMEM; | |
2842 | } | |
2843 | ||
2844 | len = sprintf(pool_name, "ohci1394_rcv_prg"); | |
2845 | sprintf(pool_name+len, "%d", num_allocs); | |
2846 | d->prg_pool = pci_pool_create(pool_name, ohci->dev, | |
2847 | sizeof(struct dma_cmd), 4, 0); | |
2848 | if(d->prg_pool == NULL) | |
2849 | { | |
2850 | PRINT(KERN_ERR, "pci_pool_create failed for %s", pool_name); | |
2851 | free_dma_rcv_ctx(d); | |
2852 | return -ENOMEM; | |
2853 | } | |
2854 | num_allocs++; | |
2855 | ||
1da177e4 LT |
2856 | for (i=0; i<d->num_desc; i++) { |
2857 | d->buf_cpu[i] = pci_alloc_consistent(ohci->dev, | |
2858 | d->buf_size, | |
2859 | d->buf_bus+i); | |
1da177e4 LT |
2860 | |
2861 | if (d->buf_cpu[i] != NULL) { | |
2862 | memset(d->buf_cpu[i], 0, d->buf_size); | |
2863 | } else { | |
2864 | PRINT(KERN_ERR, | |
c4e2e02b | 2865 | "Failed to allocate %s", "DMA buffer"); |
1da177e4 LT |
2866 | free_dma_rcv_ctx(d); |
2867 | return -ENOMEM; | |
2868 | } | |
2869 | ||
e94b1766 | 2870 | d->prg_cpu[i] = pci_pool_alloc(d->prg_pool, GFP_KERNEL, d->prg_bus+i); |
1da177e4 LT |
2871 | |
2872 | if (d->prg_cpu[i] != NULL) { | |
2873 | memset(d->prg_cpu[i], 0, sizeof(struct dma_cmd)); | |
2874 | } else { | |
2875 | PRINT(KERN_ERR, | |
c4e2e02b | 2876 | "Failed to allocate %s", "DMA prg"); |
1da177e4 LT |
2877 | free_dma_rcv_ctx(d); |
2878 | return -ENOMEM; | |
2879 | } | |
2880 | } | |
2881 | ||
2882 | spin_lock_init(&d->lock); | |
2883 | ||
53c96b41 SR |
2884 | d->ctrlSet = context_base + OHCI1394_ContextControlSet; |
2885 | d->ctrlClear = context_base + OHCI1394_ContextControlClear; | |
2886 | d->cmdPtr = context_base + OHCI1394_ContextCommandPtr; | |
1da177e4 | 2887 | |
53c96b41 | 2888 | tasklet_init(&d->task, dma_rcv_tasklet, (unsigned long) d); |
1da177e4 LT |
2889 | return 0; |
2890 | } | |
2891 | ||
2892 | static void free_dma_trm_ctx(struct dma_trm_ctx *d) | |
2893 | { | |
2894 | int i; | |
2895 | struct ti_ohci *ohci = d->ohci; | |
2896 | ||
2897 | if (ohci == NULL) | |
2898 | return; | |
2899 | ||
2900 | DBGMSG("Freeing dma_trm_ctx %d", d->ctx); | |
2901 | ||
2902 | if (d->prg_cpu) { | |
2903 | for (i=0; i<d->num_desc; i++) | |
17a62486 SR |
2904 | if (d->prg_cpu[i] && d->prg_bus[i]) |
2905 | pci_pool_free(d->prg_pool, d->prg_cpu[i], | |
2906 | d->prg_bus[i]); | |
1da177e4 | 2907 | pci_pool_destroy(d->prg_pool); |
1da177e4 LT |
2908 | kfree(d->prg_cpu); |
2909 | kfree(d->prg_bus); | |
2910 | } | |
2911 | ||
2912 | /* Mark this context as freed. */ | |
2913 | d->ohci = NULL; | |
2914 | } | |
2915 | ||
2916 | static int | |
2917 | alloc_dma_trm_ctx(struct ti_ohci *ohci, struct dma_trm_ctx *d, | |
2918 | enum context_type type, int ctx, int num_desc, | |
2919 | int context_base) | |
2920 | { | |
2921 | int i, len; | |
2922 | static char pool_name[20]; | |
2923 | static int num_allocs=0; | |
2924 | ||
2925 | d->ohci = ohci; | |
2926 | d->type = type; | |
2927 | d->ctx = ctx; | |
2928 | d->num_desc = num_desc; | |
2929 | d->ctrlSet = 0; | |
2930 | d->ctrlClear = 0; | |
2931 | d->cmdPtr = 0; | |
2932 | ||
8551158a SR |
2933 | d->prg_cpu = kzalloc(d->num_desc * sizeof(*d->prg_cpu), GFP_KERNEL); |
2934 | d->prg_bus = kzalloc(d->num_desc * sizeof(*d->prg_bus), GFP_KERNEL); | |
1da177e4 LT |
2935 | |
2936 | if (d->prg_cpu == NULL || d->prg_bus == NULL) { | |
c4e2e02b | 2937 | PRINT(KERN_ERR, "Failed to allocate %s", "AT DMA prg"); |
1da177e4 LT |
2938 | free_dma_trm_ctx(d); |
2939 | return -ENOMEM; | |
2940 | } | |
1da177e4 LT |
2941 | |
2942 | len = sprintf(pool_name, "ohci1394_trm_prg"); | |
2943 | sprintf(pool_name+len, "%d", num_allocs); | |
2944 | d->prg_pool = pci_pool_create(pool_name, ohci->dev, | |
2945 | sizeof(struct at_dma_prg), 4, 0); | |
2946 | if (d->prg_pool == NULL) { | |
2947 | PRINT(KERN_ERR, "pci_pool_create failed for %s", pool_name); | |
2948 | free_dma_trm_ctx(d); | |
2949 | return -ENOMEM; | |
2950 | } | |
2951 | num_allocs++; | |
2952 | ||
1da177e4 | 2953 | for (i = 0; i < d->num_desc; i++) { |
e94b1766 | 2954 | d->prg_cpu[i] = pci_pool_alloc(d->prg_pool, GFP_KERNEL, d->prg_bus+i); |
1da177e4 LT |
2955 | |
2956 | if (d->prg_cpu[i] != NULL) { | |
2957 | memset(d->prg_cpu[i], 0, sizeof(struct at_dma_prg)); | |
2958 | } else { | |
2959 | PRINT(KERN_ERR, | |
c4e2e02b | 2960 | "Failed to allocate %s", "AT DMA prg"); |
1da177e4 LT |
2961 | free_dma_trm_ctx(d); |
2962 | return -ENOMEM; | |
2963 | } | |
2964 | } | |
2965 | ||
2966 | spin_lock_init(&d->lock); | |
2967 | ||
2968 | /* initialize tasklet */ | |
53c96b41 SR |
2969 | d->ctrlSet = context_base + OHCI1394_ContextControlSet; |
2970 | d->ctrlClear = context_base + OHCI1394_ContextControlClear; | |
2971 | d->cmdPtr = context_base + OHCI1394_ContextCommandPtr; | |
2972 | tasklet_init(&d->task, dma_trm_tasklet, (unsigned long)d); | |
1da177e4 LT |
2973 | return 0; |
2974 | } | |
2975 | ||
debb4806 | 2976 | static void ohci_set_hw_config_rom(struct hpsb_host *host, __be32 *config_rom) |
1da177e4 LT |
2977 | { |
2978 | struct ti_ohci *ohci = host->hostdata; | |
2979 | ||
2980 | reg_write(ohci, OHCI1394_ConfigROMhdr, be32_to_cpu(config_rom[0])); | |
2981 | reg_write(ohci, OHCI1394_BusOptions, be32_to_cpu(config_rom[2])); | |
2982 | ||
2983 | memcpy(ohci->csr_config_rom_cpu, config_rom, OHCI_CONFIG_ROM_LEN); | |
2984 | } | |
2985 | ||
2986 | ||
2987 | static quadlet_t ohci_hw_csr_reg(struct hpsb_host *host, int reg, | |
2988 | quadlet_t data, quadlet_t compare) | |
2989 | { | |
2990 | struct ti_ohci *ohci = host->hostdata; | |
2991 | int i; | |
2992 | ||
2993 | reg_write(ohci, OHCI1394_CSRData, data); | |
2994 | reg_write(ohci, OHCI1394_CSRCompareData, compare); | |
2995 | reg_write(ohci, OHCI1394_CSRControl, reg & 0x3); | |
2996 | ||
2997 | for (i = 0; i < OHCI_LOOP_COUNT; i++) { | |
2998 | if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) | |
2999 | break; | |
3000 | ||
3001 | mdelay(1); | |
3002 | } | |
3003 | ||
3004 | return reg_read(ohci, OHCI1394_CSRData); | |
3005 | } | |
3006 | ||
3007 | static struct hpsb_host_driver ohci1394_driver = { | |
3008 | .owner = THIS_MODULE, | |
3009 | .name = OHCI1394_DRIVER_NAME, | |
3010 | .set_hw_config_rom = ohci_set_hw_config_rom, | |
3011 | .transmit_packet = ohci_transmit, | |
3012 | .devctl = ohci_devctl, | |
3013 | .isoctl = ohci_isoctl, | |
3014 | .hw_csr_reg = ohci_hw_csr_reg, | |
3015 | }; | |
3016 | ||
1da177e4 LT |
3017 | /*********************************** |
3018 | * PCI Driver Interface functions * | |
3019 | ***********************************/ | |
3020 | ||
48cfae44 | 3021 | #ifdef CONFIG_PPC_PMAC |
b25d1666 SR |
3022 | static void ohci1394_pmac_on(struct pci_dev *dev) |
3023 | { | |
48cfae44 | 3024 | if (machine_is(powermac)) { |
5370f1f5 | 3025 | struct device_node *ofn = pci_device_to_OF_node(dev); |
48cfae44 | 3026 | |
5370f1f5 SR |
3027 | if (ofn) { |
3028 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1); | |
3029 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1); | |
48cfae44 SR |
3030 | } |
3031 | } | |
b25d1666 SR |
3032 | } |
3033 | ||
3034 | static void ohci1394_pmac_off(struct pci_dev *dev) | |
3035 | { | |
3036 | if (machine_is(powermac)) { | |
3037 | struct device_node *ofn = pci_device_to_OF_node(dev); | |
3038 | ||
3039 | if (ofn) { | |
3040 | pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0); | |
3041 | pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0); | |
3042 | } | |
3043 | } | |
3044 | } | |
3045 | #else | |
3046 | #define ohci1394_pmac_on(dev) | |
3047 | #define ohci1394_pmac_off(dev) | |
48cfae44 SR |
3048 | #endif /* CONFIG_PPC_PMAC */ |
3049 | ||
b25d1666 SR |
3050 | static int __devinit ohci1394_pci_probe(struct pci_dev *dev, |
3051 | const struct pci_device_id *ent) | |
3052 | { | |
3053 | struct hpsb_host *host; | |
3054 | struct ti_ohci *ohci; /* shortcut to currently handled device */ | |
3055 | resource_size_t ohci_base; | |
d09c6803 | 3056 | int err = -ENOMEM; |
b25d1666 SR |
3057 | |
3058 | ohci1394_pmac_on(dev); | |
d09c6803 SR |
3059 | if (pci_enable_device(dev)) { |
3060 | PRINT_G(KERN_ERR, "Failed to enable OHCI hardware"); | |
3061 | err = -ENXIO; | |
3062 | goto err; | |
3063 | } | |
1da177e4 LT |
3064 | pci_set_master(dev); |
3065 | ||
3066 | host = hpsb_alloc_host(&ohci1394_driver, sizeof(struct ti_ohci), &dev->dev); | |
d09c6803 | 3067 | if (!host) { |
c4e2e02b | 3068 | PRINT_G(KERN_ERR, "Failed to allocate %s", "host structure"); |
d09c6803 SR |
3069 | goto err; |
3070 | } | |
1da177e4 LT |
3071 | ohci = host->hostdata; |
3072 | ohci->dev = dev; | |
3073 | ohci->host = host; | |
3074 | ohci->init_state = OHCI_INIT_ALLOC_HOST; | |
3075 | host->pdev = dev; | |
3076 | pci_set_drvdata(dev, ohci); | |
3077 | ||
3078 | /* We don't want hardware swapping */ | |
3079 | pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0); | |
3080 | ||
3081 | /* Some oddball Apple controllers do not order the selfid | |
3082 | * properly, so we make up for it here. */ | |
3083 | #ifndef __LITTLE_ENDIAN | |
3084 | /* XXX: Need a better way to check this. I'm wondering if we can | |
3085 | * read the values of the OHCI1394_PCI_HCI_Control and the | |
3086 | * noByteSwapData registers to see if they were not cleared to | |
3087 | * zero. Should this work? Obviously it's not defined what these | |
3088 | * registers will read when they aren't supported. Bleh! */ | |
3089 | if (dev->vendor == PCI_VENDOR_ID_APPLE && | |
3090 | dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW) { | |
3091 | ohci->no_swap_incoming = 1; | |
3092 | ohci->selfid_swap = 0; | |
3093 | } else | |
3094 | ohci->selfid_swap = 1; | |
3095 | #endif | |
3096 | ||
3097 | ||
3098 | #ifndef PCI_DEVICE_ID_NVIDIA_NFORCE2_FW | |
3099 | #define PCI_DEVICE_ID_NVIDIA_NFORCE2_FW 0x006e | |
3100 | #endif | |
3101 | ||
3102 | /* These chipsets require a bit of extra care when checking after | |
3103 | * a busreset. */ | |
3104 | if ((dev->vendor == PCI_VENDOR_ID_APPLE && | |
3105 | dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW) || | |
3106 | (dev->vendor == PCI_VENDOR_ID_NVIDIA && | |
3107 | dev->device == PCI_DEVICE_ID_NVIDIA_NFORCE2_FW)) | |
3108 | ohci->check_busreset = 1; | |
3109 | ||
3110 | /* We hardwire the MMIO length, since some CardBus adaptors | |
3111 | * fail to report the right length. Anyway, the ohci spec | |
3112 | * clearly says it's 2kb, so this shouldn't be a problem. */ | |
3113 | ohci_base = pci_resource_start(dev, 0); | |
94c2d01a | 3114 | if (pci_resource_len(dev, 0) < OHCI1394_REGISTER_SIZE) |
e29419ff GKH |
3115 | PRINT(KERN_WARNING, "PCI resource length of 0x%llx too small!", |
3116 | (unsigned long long)pci_resource_len(dev, 0)); | |
1da177e4 | 3117 | |
083922fe | 3118 | if (!request_mem_region(ohci_base, OHCI1394_REGISTER_SIZE, |
d09c6803 SR |
3119 | OHCI1394_DRIVER_NAME)) { |
3120 | PRINT_G(KERN_ERR, "MMIO resource (0x%llx - 0x%llx) unavailable", | |
e29419ff GKH |
3121 | (unsigned long long)ohci_base, |
3122 | (unsigned long long)ohci_base + OHCI1394_REGISTER_SIZE); | |
d09c6803 SR |
3123 | goto err; |
3124 | } | |
1da177e4 LT |
3125 | ohci->init_state = OHCI_INIT_HAVE_MEM_REGION; |
3126 | ||
3127 | ohci->registers = ioremap(ohci_base, OHCI1394_REGISTER_SIZE); | |
d09c6803 SR |
3128 | if (ohci->registers == NULL) { |
3129 | PRINT_G(KERN_ERR, "Failed to remap registers"); | |
3130 | err = -ENXIO; | |
3131 | goto err; | |
3132 | } | |
1da177e4 LT |
3133 | ohci->init_state = OHCI_INIT_HAVE_IOMAPPING; |
3134 | DBGMSG("Remapped memory spaces reg 0x%p", ohci->registers); | |
3135 | ||
3136 | /* csr_config rom allocation */ | |
3137 | ohci->csr_config_rom_cpu = | |
3138 | pci_alloc_consistent(ohci->dev, OHCI_CONFIG_ROM_LEN, | |
3139 | &ohci->csr_config_rom_bus); | |
d09c6803 | 3140 | if (ohci->csr_config_rom_cpu == NULL) { |
c4e2e02b | 3141 | PRINT_G(KERN_ERR, "Failed to allocate %s", "buffer config rom"); |
d09c6803 SR |
3142 | goto err; |
3143 | } | |
1da177e4 LT |
3144 | ohci->init_state = OHCI_INIT_HAVE_CONFIG_ROM_BUFFER; |
3145 | ||
3146 | /* self-id dma buffer allocation */ | |
3147 | ohci->selfid_buf_cpu = | |
3148 | pci_alloc_consistent(ohci->dev, OHCI1394_SI_DMA_BUF_SIZE, | |
3149 | &ohci->selfid_buf_bus); | |
d09c6803 | 3150 | if (ohci->selfid_buf_cpu == NULL) { |
c4e2e02b | 3151 | PRINT_G(KERN_ERR, "Failed to allocate %s", "self-ID buffer"); |
d09c6803 SR |
3152 | goto err; |
3153 | } | |
1da177e4 LT |
3154 | ohci->init_state = OHCI_INIT_HAVE_SELFID_BUFFER; |
3155 | ||
3156 | if ((unsigned long)ohci->selfid_buf_cpu & 0x1fff) | |
3157 | PRINT(KERN_INFO, "SelfID buffer %p is not aligned on " | |
3158 | "8Kb boundary... may cause problems on some CXD3222 chip", | |
3159 | ohci->selfid_buf_cpu); | |
3160 | ||
3161 | /* No self-id errors at startup */ | |
3162 | ohci->self_id_errors = 0; | |
3163 | ||
3164 | ohci->init_state = OHCI_INIT_HAVE_TXRX_BUFFERS__MAYBE; | |
3165 | /* AR DMA request context allocation */ | |
3166 | if (alloc_dma_rcv_ctx(ohci, &ohci->ar_req_context, | |
3167 | DMA_CTX_ASYNC_REQ, 0, AR_REQ_NUM_DESC, | |
3168 | AR_REQ_BUF_SIZE, AR_REQ_SPLIT_BUF_SIZE, | |
d09c6803 | 3169 | OHCI1394_AsReqRcvContextBase) < 0) { |
c4e2e02b | 3170 | PRINT_G(KERN_ERR, "Failed to allocate %s", "AR Req context"); |
d09c6803 SR |
3171 | goto err; |
3172 | } | |
1da177e4 LT |
3173 | /* AR DMA response context allocation */ |
3174 | if (alloc_dma_rcv_ctx(ohci, &ohci->ar_resp_context, | |
3175 | DMA_CTX_ASYNC_RESP, 0, AR_RESP_NUM_DESC, | |
3176 | AR_RESP_BUF_SIZE, AR_RESP_SPLIT_BUF_SIZE, | |
d09c6803 | 3177 | OHCI1394_AsRspRcvContextBase) < 0) { |
c4e2e02b | 3178 | PRINT_G(KERN_ERR, "Failed to allocate %s", "AR Resp context"); |
d09c6803 SR |
3179 | goto err; |
3180 | } | |
1da177e4 LT |
3181 | /* AT DMA request context */ |
3182 | if (alloc_dma_trm_ctx(ohci, &ohci->at_req_context, | |
3183 | DMA_CTX_ASYNC_REQ, 0, AT_REQ_NUM_DESC, | |
d09c6803 | 3184 | OHCI1394_AsReqTrContextBase) < 0) { |
c4e2e02b | 3185 | PRINT_G(KERN_ERR, "Failed to allocate %s", "AT Req context"); |
d09c6803 SR |
3186 | goto err; |
3187 | } | |
1da177e4 LT |
3188 | /* AT DMA response context */ |
3189 | if (alloc_dma_trm_ctx(ohci, &ohci->at_resp_context, | |
3190 | DMA_CTX_ASYNC_RESP, 1, AT_RESP_NUM_DESC, | |
d09c6803 | 3191 | OHCI1394_AsRspTrContextBase) < 0) { |
c4e2e02b | 3192 | PRINT_G(KERN_ERR, "Failed to allocate %s", "AT Resp context"); |
d09c6803 SR |
3193 | goto err; |
3194 | } | |
1da177e4 LT |
3195 | /* Start off with a soft reset, to clear everything to a sane |
3196 | * state. */ | |
3197 | ohci_soft_reset(ohci); | |
3198 | ||
3199 | /* Now enable LPS, which we need in order to start accessing | |
3200 | * most of the registers. In fact, on some cards (ALI M5251), | |
3201 | * accessing registers in the SClk domain without LPS enabled | |
cbe7dd69 | 3202 | * will lock up the machine. */ |
1da177e4 LT |
3203 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_LPS); |
3204 | ||
3205 | /* Disable and clear interrupts */ | |
3206 | reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff); | |
3207 | reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff); | |
3208 | ||
cbe7dd69 SR |
3209 | /* Flush MMIO writes and wait to make sure we have full link enabled. */ |
3210 | reg_read(ohci, OHCI1394_Version); | |
3211 | msleep(50); | |
1da177e4 LT |
3212 | |
3213 | /* Determine the number of available IR and IT contexts. */ | |
3214 | ohci->nb_iso_rcv_ctx = | |
3215 | get_nb_iso_ctx(ohci, OHCI1394_IsoRecvIntMaskSet); | |
1da177e4 LT |
3216 | ohci->nb_iso_xmit_ctx = |
3217 | get_nb_iso_ctx(ohci, OHCI1394_IsoXmitIntMaskSet); | |
1da177e4 LT |
3218 | |
3219 | /* Set the usage bits for non-existent contexts so they can't | |
3220 | * be allocated */ | |
3221 | ohci->ir_ctx_usage = ~0 << ohci->nb_iso_rcv_ctx; | |
3222 | ohci->it_ctx_usage = ~0 << ohci->nb_iso_xmit_ctx; | |
3223 | ||
3224 | INIT_LIST_HEAD(&ohci->iso_tasklet_list); | |
3225 | spin_lock_init(&ohci->iso_tasklet_list_lock); | |
3226 | ohci->ISO_channel_usage = 0; | |
3227 | spin_lock_init(&ohci->IR_channel_lock); | |
3228 | ||
3515d016 | 3229 | spin_lock_init(&ohci->event_lock); |
1da177e4 | 3230 | |
3515d016 | 3231 | /* |
272ee69c | 3232 | * interrupts are disabled, all right, but... due to IRQF_SHARED we |
3515d016 AV |
3233 | * might get called anyway. We'll see no event, of course, but |
3234 | * we need to get to that "no event", so enough should be initialized | |
3235 | * by that point. | |
3236 | */ | |
9e234faf SR |
3237 | err = request_irq(dev->irq, ohci_irq_handler, IRQF_SHARED, |
3238 | OHCI1394_DRIVER_NAME, ohci); | |
3239 | if (err) { | |
d09c6803 SR |
3240 | PRINT_G(KERN_ERR, "Failed to allocate interrupt %d", dev->irq); |
3241 | goto err; | |
3242 | } | |
1da177e4 LT |
3243 | ohci->init_state = OHCI_INIT_HAVE_IRQ; |
3244 | ohci_initialize(ohci); | |
3245 | ||
3246 | /* Set certain csr values */ | |
3247 | host->csr.guid_hi = reg_read(ohci, OHCI1394_GUIDHi); | |
3248 | host->csr.guid_lo = reg_read(ohci, OHCI1394_GUIDLo); | |
3249 | host->csr.cyc_clk_acc = 100; /* how do we determine clk accuracy? */ | |
3250 | host->csr.max_rec = (reg_read(ohci, OHCI1394_BusOptions) >> 12) & 0xf; | |
3251 | host->csr.lnk_spd = reg_read(ohci, OHCI1394_BusOptions) & 0x7; | |
3252 | ||
4611ed38 BC |
3253 | if (phys_dma) { |
3254 | host->low_addr_space = | |
3255 | (u64) reg_read(ohci, OHCI1394_PhyUpperBound) << 16; | |
3256 | if (!host->low_addr_space) | |
3257 | host->low_addr_space = OHCI1394_PHYS_UPPER_BOUND_FIXED; | |
3258 | } | |
3259 | host->middle_addr_space = OHCI1394_MIDDLE_ADDRESS_SPACE; | |
3260 | ||
1da177e4 | 3261 | /* Tell the highlevel this host is ready */ |
d09c6803 SR |
3262 | if (hpsb_add_host(host)) { |
3263 | PRINT_G(KERN_ERR, "Failed to register host with highlevel"); | |
3264 | goto err; | |
3265 | } | |
1da177e4 LT |
3266 | ohci->init_state = OHCI_INIT_DONE; |
3267 | ||
3268 | return 0; | |
d09c6803 SR |
3269 | err: |
3270 | ohci1394_pci_remove(dev); | |
3271 | return err; | |
1da177e4 LT |
3272 | } |
3273 | ||
b25d1666 | 3274 | static void ohci1394_pci_remove(struct pci_dev *dev) |
1da177e4 LT |
3275 | { |
3276 | struct ti_ohci *ohci; | |
b25d1666 | 3277 | struct device *device; |
1da177e4 | 3278 | |
b25d1666 | 3279 | ohci = pci_get_drvdata(dev); |
1da177e4 | 3280 | if (!ohci) |
9508c208 | 3281 | goto out; |
1da177e4 | 3282 | |
b25d1666 | 3283 | device = get_device(&ohci->host->device); |
1da177e4 LT |
3284 | |
3285 | switch (ohci->init_state) { | |
3286 | case OHCI_INIT_DONE: | |
1da177e4 LT |
3287 | hpsb_remove_host(ohci->host); |
3288 | ||
3289 | /* Clear out BUS Options */ | |
3290 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); | |
3291 | reg_write(ohci, OHCI1394_BusOptions, | |
3292 | (reg_read(ohci, OHCI1394_BusOptions) & 0x0000f007) | | |
3293 | 0x00ff0000); | |
3294 | memset(ohci->csr_config_rom_cpu, 0, OHCI_CONFIG_ROM_LEN); | |
3295 | ||
3296 | case OHCI_INIT_HAVE_IRQ: | |
3297 | /* Clear interrupt registers */ | |
3298 | reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff); | |
3299 | reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff); | |
3300 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 0xffffffff); | |
3301 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 0xffffffff); | |
3302 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 0xffffffff); | |
3303 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 0xffffffff); | |
3304 | ||
3305 | /* Disable IRM Contender */ | |
3306 | set_phy_reg(ohci, 4, ~0xc0 & get_phy_reg(ohci, 4)); | |
3307 | ||
3308 | /* Clear link control register */ | |
3309 | reg_write(ohci, OHCI1394_LinkControlClear, 0xffffffff); | |
3310 | ||
3311 | /* Let all other nodes know to ignore us */ | |
3312 | ohci_devctl(ohci->host, RESET_BUS, LONG_RESET_NO_FORCE_ROOT); | |
3313 | ||
3314 | /* Soft reset before we start - this disables | |
3315 | * interrupts and clears linkEnable and LPS. */ | |
3316 | ohci_soft_reset(ohci); | |
b25d1666 | 3317 | free_irq(dev->irq, ohci); |
1da177e4 LT |
3318 | |
3319 | case OHCI_INIT_HAVE_TXRX_BUFFERS__MAYBE: | |
3320 | /* The ohci_soft_reset() stops all DMA contexts, so we | |
3321 | * dont need to do this. */ | |
1da177e4 LT |
3322 | free_dma_rcv_ctx(&ohci->ar_req_context); |
3323 | free_dma_rcv_ctx(&ohci->ar_resp_context); | |
1da177e4 LT |
3324 | free_dma_trm_ctx(&ohci->at_req_context); |
3325 | free_dma_trm_ctx(&ohci->at_resp_context); | |
1da177e4 | 3326 | |
1da177e4 | 3327 | case OHCI_INIT_HAVE_SELFID_BUFFER: |
b25d1666 | 3328 | pci_free_consistent(dev, OHCI1394_SI_DMA_BUF_SIZE, |
1da177e4 LT |
3329 | ohci->selfid_buf_cpu, |
3330 | ohci->selfid_buf_bus); | |
1da177e4 LT |
3331 | |
3332 | case OHCI_INIT_HAVE_CONFIG_ROM_BUFFER: | |
b25d1666 | 3333 | pci_free_consistent(dev, OHCI_CONFIG_ROM_LEN, |
1da177e4 LT |
3334 | ohci->csr_config_rom_cpu, |
3335 | ohci->csr_config_rom_bus); | |
1da177e4 LT |
3336 | |
3337 | case OHCI_INIT_HAVE_IOMAPPING: | |
3338 | iounmap(ohci->registers); | |
3339 | ||
3340 | case OHCI_INIT_HAVE_MEM_REGION: | |
b25d1666 | 3341 | release_mem_region(pci_resource_start(dev, 0), |
1da177e4 | 3342 | OHCI1394_REGISTER_SIZE); |
1da177e4 | 3343 | |
1da177e4 | 3344 | case OHCI_INIT_ALLOC_HOST: |
b25d1666 | 3345 | pci_set_drvdata(dev, NULL); |
1da177e4 LT |
3346 | } |
3347 | ||
b25d1666 SR |
3348 | if (device) |
3349 | put_device(device); | |
9508c208 SR |
3350 | out: |
3351 | ohci1394_pmac_off(dev); | |
1da177e4 LT |
3352 | } |
3353 | ||
2a874182 | 3354 | #ifdef CONFIG_PM |
b25d1666 | 3355 | static int ohci1394_pci_suspend(struct pci_dev *dev, pm_message_t state) |
1da177e4 | 3356 | { |
f011bf08 | 3357 | int err; |
b25d1666 | 3358 | struct ti_ohci *ohci = pci_get_drvdata(dev); |
f011bf08 | 3359 | |
5f8d17f6 SR |
3360 | if (!ohci) { |
3361 | printk(KERN_ERR "%s: tried to suspend nonexisting host\n", | |
3362 | OHCI1394_DRIVER_NAME); | |
da256c55 | 3363 | return -ENXIO; |
5f8d17f6 SR |
3364 | } |
3365 | DBGMSG("suspend called"); | |
f011bf08 | 3366 | |
da256c55 | 3367 | /* Clear the async DMA contexts and stop using the controller */ |
f011bf08 BK |
3368 | hpsb_bus_reset(ohci->host); |
3369 | ||
da256c55 | 3370 | /* See ohci1394_pci_remove() for comments on this sequence */ |
f011bf08 BK |
3371 | reg_write(ohci, OHCI1394_ConfigROMhdr, 0); |
3372 | reg_write(ohci, OHCI1394_BusOptions, | |
3373 | (reg_read(ohci, OHCI1394_BusOptions) & 0x0000f007) | | |
3374 | 0x00ff0000); | |
f011bf08 BK |
3375 | reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff); |
3376 | reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff); | |
3377 | reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 0xffffffff); | |
3378 | reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 0xffffffff); | |
3379 | reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 0xffffffff); | |
3380 | reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 0xffffffff); | |
f011bf08 | 3381 | set_phy_reg(ohci, 4, ~0xc0 & get_phy_reg(ohci, 4)); |
f011bf08 | 3382 | reg_write(ohci, OHCI1394_LinkControlClear, 0xffffffff); |
f011bf08 | 3383 | ohci_devctl(ohci->host, RESET_BUS, LONG_RESET_NO_FORCE_ROOT); |
f011bf08 | 3384 | ohci_soft_reset(ohci); |
346f5c7e | 3385 | |
d1069aea | 3386 | free_irq(dev->irq, ohci); |
b25d1666 | 3387 | err = pci_save_state(dev); |
2a3f8ad3 | 3388 | if (err) { |
5f8d17f6 | 3389 | PRINT(KERN_ERR, "pci_save_state failed with %d", err); |
da256c55 | 3390 | return err; |
2a3f8ad3 | 3391 | } |
b25d1666 | 3392 | err = pci_set_power_state(dev, pci_choose_state(dev, state)); |
ea6104c2 | 3393 | if (err) |
5f8d17f6 | 3394 | DBGMSG("pci_set_power_state failed with %d", err); |
b25d1666 | 3395 | ohci1394_pmac_off(dev); |
da256c55 SR |
3396 | |
3397 | return 0; | |
3398 | } | |
3399 | ||
b25d1666 | 3400 | static int ohci1394_pci_resume(struct pci_dev *dev) |
da256c55 SR |
3401 | { |
3402 | int err; | |
b25d1666 | 3403 | struct ti_ohci *ohci = pci_get_drvdata(dev); |
da256c55 | 3404 | |
5f8d17f6 SR |
3405 | if (!ohci) { |
3406 | printk(KERN_ERR "%s: tried to resume nonexisting host\n", | |
3407 | OHCI1394_DRIVER_NAME); | |
da256c55 | 3408 | return -ENXIO; |
5f8d17f6 SR |
3409 | } |
3410 | DBGMSG("resume called"); | |
da256c55 | 3411 | |
b25d1666 SR |
3412 | ohci1394_pmac_on(dev); |
3413 | pci_set_power_state(dev, PCI_D0); | |
3414 | pci_restore_state(dev); | |
3415 | err = pci_enable_device(dev); | |
5f8d17f6 SR |
3416 | if (err) { |
3417 | PRINT(KERN_ERR, "pci_enable_device failed with %d", err); | |
da256c55 | 3418 | return err; |
5f8d17f6 | 3419 | } |
da256c55 SR |
3420 | |
3421 | /* See ohci1394_pci_probe() for comments on this sequence */ | |
3422 | ohci_soft_reset(ohci); | |
3423 | reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_LPS); | |
3424 | reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff); | |
3425 | reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff); | |
cbe7dd69 SR |
3426 | reg_read(ohci, OHCI1394_Version); |
3427 | msleep(50); | |
d1069aea | 3428 | |
9e234faf SR |
3429 | err = request_irq(dev->irq, ohci_irq_handler, IRQF_SHARED, |
3430 | OHCI1394_DRIVER_NAME, ohci); | |
3431 | if (err) { | |
d1069aea | 3432 | PRINT_G(KERN_ERR, "Failed to allocate interrupt %d", dev->irq); |
9e234faf | 3433 | return err; |
d1069aea FP |
3434 | } |
3435 | ||
da256c55 SR |
3436 | ohci_initialize(ohci); |
3437 | ||
3360177c | 3438 | hpsb_resume_host(ohci->host); |
da256c55 | 3439 | return 0; |
1da177e4 | 3440 | } |
f0645e77 | 3441 | #endif /* CONFIG_PM */ |
1da177e4 | 3442 | |
1da177e4 LT |
3443 | static struct pci_device_id ohci1394_pci_tbl[] = { |
3444 | { |