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15#include <linux/tifm.h>
16#include <linux/memstick.h>
17#include <linux/highmem.h>
18#include <linux/scatterlist.h>
19#include <linux/log2.h>
20#include <linux/module.h>
21#include <asm/io.h>
22
23#define DRIVER_NAME "tifm_ms"
24
25static bool no_dma;
26module_param(no_dma, bool, 0644);
27
28
29
30
31
32
33#define TIFM_MS_STAT_DRQ 0x04000
34#define TIFM_MS_STAT_MSINT 0x02000
35#define TIFM_MS_STAT_RDY 0x01000
36#define TIFM_MS_STAT_CRC 0x00200
37#define TIFM_MS_STAT_TOE 0x00100
38#define TIFM_MS_STAT_EMP 0x00020
39#define TIFM_MS_STAT_FUL 0x00010
40#define TIFM_MS_STAT_CED 0x00008
41#define TIFM_MS_STAT_ERR 0x00004
42#define TIFM_MS_STAT_BRQ 0x00002
43#define TIFM_MS_STAT_CNK 0x00001
44
45#define TIFM_MS_SYS_DMA 0x10000
46#define TIFM_MS_SYS_RESET 0x08000
47#define TIFM_MS_SYS_SRAC 0x04000
48#define TIFM_MS_SYS_INTEN 0x02000
49#define TIFM_MS_SYS_NOCRC 0x01000
50#define TIFM_MS_SYS_INTCLR 0x00800
51#define TIFM_MS_SYS_MSIEN 0x00400
52#define TIFM_MS_SYS_FCLR 0x00200
53#define TIFM_MS_SYS_FDIR 0x00100
54#define TIFM_MS_SYS_DAM 0x00080
55#define TIFM_MS_SYS_DRM 0x00040
56#define TIFM_MS_SYS_DRQSL 0x00020
57#define TIFM_MS_SYS_REI 0x00010
58#define TIFM_MS_SYS_REO 0x00008
59#define TIFM_MS_SYS_BSY_MASK 0x00007
60
61#define TIFM_MS_SYS_FIFO (TIFM_MS_SYS_INTEN | TIFM_MS_SYS_MSIEN \
62 | TIFM_MS_SYS_FCLR | TIFM_MS_SYS_BSY_MASK)
63
64
65enum {
66 CMD_READY = 0x01,
67 FIFO_READY = 0x02,
68 CARD_INT = 0x04
69};
70
71struct tifm_ms {
72 struct tifm_dev *dev;
73 struct timer_list timer;
74 struct memstick_request *req;
75 struct tasklet_struct notify;
76 unsigned int mode_mask;
77 unsigned int block_pos;
78 unsigned long timeout_jiffies;
79 unsigned char eject:1,
80 use_dma:1;
81 unsigned char cmd_flags;
82 unsigned char io_pos;
83 unsigned int io_word;
84};
85
86static unsigned int tifm_ms_read_data(struct tifm_ms *host,
87 unsigned char *buf, unsigned int length)
88{
89 struct tifm_dev *sock = host->dev;
90 unsigned int off = 0;
91
92 while (host->io_pos && length) {
93 buf[off++] = host->io_word & 0xff;
94 host->io_word >>= 8;
95 length--;
96 host->io_pos--;
97 }
98
99 if (!length)
100 return off;
101
102 while (!(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
103 if (length < 4)
104 break;
105 *(unsigned int *)(buf + off) = __raw_readl(sock->addr
106 + SOCK_MS_DATA);
107 length -= 4;
108 off += 4;
109 }
110
111 if (length
112 && !(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
113 host->io_word = readl(sock->addr + SOCK_MS_DATA);
114 for (host->io_pos = 4; host->io_pos; --host->io_pos) {
115 buf[off++] = host->io_word & 0xff;
116 host->io_word >>= 8;
117 length--;
118 if (!length)
119 break;
120 }
121 }
122
123 return off;
124}
125
126static unsigned int tifm_ms_write_data(struct tifm_ms *host,
127 unsigned char *buf, unsigned int length)
128{
129 struct tifm_dev *sock = host->dev;
130 unsigned int off = 0;
131
132 if (host->io_pos) {
133 while (host->io_pos < 4 && length) {
134 host->io_word |= buf[off++] << (host->io_pos * 8);
135 host->io_pos++;
136 length--;
137 }
138 }
139
140 if (host->io_pos == 4
141 && !(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
142 writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
143 sock->addr + SOCK_MS_SYSTEM);
144 writel(host->io_word, sock->addr + SOCK_MS_DATA);
145 host->io_pos = 0;
146 host->io_word = 0;
147 } else if (host->io_pos) {
148 return off;
149 }
150
151 if (!length)
152 return off;
153
154 while (!(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
155 if (length < 4)
156 break;
157 writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
158 sock->addr + SOCK_MS_SYSTEM);
159 __raw_writel(*(unsigned int *)(buf + off),
160 sock->addr + SOCK_MS_DATA);
161 length -= 4;
162 off += 4;
163 }
164
165 switch (length) {
166 case 3:
167 host->io_word |= buf[off + 2] << 16;
168 host->io_pos++;
169 case 2:
170 host->io_word |= buf[off + 1] << 8;
171 host->io_pos++;
172 case 1:
173 host->io_word |= buf[off];
174 host->io_pos++;
175 }
176
177 off += host->io_pos;
178
179 return off;
180}
181
182static unsigned int tifm_ms_transfer_data(struct tifm_ms *host)
183{
184 struct tifm_dev *sock = host->dev;
185 unsigned int length;
186 unsigned int off;
187 unsigned int t_size, p_cnt;
188 unsigned char *buf;
189 struct page *pg;
190 unsigned long flags = 0;
191
192 if (host->req->long_data) {
193 length = host->req->sg.length - host->block_pos;
194 off = host->req->sg.offset + host->block_pos;
195 } else {
196 length = host->req->data_len - host->block_pos;
197 off = 0;
198 }
199 dev_dbg(&sock->dev, "fifo data transfer, %d, %d\n", length,
200 host->block_pos);
201
202 while (length) {
203 unsigned int uninitialized_var(p_off);
204
205 if (host->req->long_data) {
206 pg = nth_page(sg_page(&host->req->sg),
207 off >> PAGE_SHIFT);
208 p_off = offset_in_page(off);
209 p_cnt = PAGE_SIZE - p_off;
210 p_cnt = min(p_cnt, length);
211
212 local_irq_save(flags);
213 buf = kmap_atomic(pg) + p_off;
214 } else {
215 buf = host->req->data + host->block_pos;
216 p_cnt = host->req->data_len - host->block_pos;
217 }
218
219 t_size = host->req->data_dir == WRITE
220 ? tifm_ms_write_data(host, buf, p_cnt)
221 : tifm_ms_read_data(host, buf, p_cnt);
222
223 if (host->req->long_data) {
224 kunmap_atomic(buf - p_off);
225 local_irq_restore(flags);
226 }
227
228 if (!t_size)
229 break;
230 host->block_pos += t_size;
231 length -= t_size;
232 off += t_size;
233 }
234
235 dev_dbg(&sock->dev, "fifo data transfer, %d remaining\n", length);
236 if (!length && (host->req->data_dir == WRITE)) {
237 if (host->io_pos) {
238 writel(TIFM_MS_SYS_FDIR
239 | readl(sock->addr + SOCK_MS_SYSTEM),
240 sock->addr + SOCK_MS_SYSTEM);
241 writel(host->io_word, sock->addr + SOCK_MS_DATA);
242 }
243 writel(TIFM_MS_SYS_FDIR
244 | readl(sock->addr + SOCK_MS_SYSTEM),
245 sock->addr + SOCK_MS_SYSTEM);
246 writel(0, sock->addr + SOCK_MS_DATA);
247 } else {
248 readl(sock->addr + SOCK_MS_DATA);
249 }
250
251 return length;
252}
253
254static int tifm_ms_issue_cmd(struct tifm_ms *host)
255{
256 struct tifm_dev *sock = host->dev;
257 unsigned char *data;
258 unsigned int data_len, cmd, sys_param;
259
260 host->cmd_flags = 0;
261 host->block_pos = 0;
262 host->io_pos = 0;
263 host->io_word = 0;
264 host->cmd_flags = 0;
265
266 data = host->req->data;
267
268 host->use_dma = !no_dma;
269
270 if (host->req->long_data) {
271 data_len = host->req->sg.length;
272 if (!is_power_of_2(data_len))
273 host->use_dma = 0;
274 } else {
275 data_len = host->req->data_len;
276 host->use_dma = 0;
277 }
278
279 writel(TIFM_FIFO_INT_SETALL,
280 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
281 writel(TIFM_FIFO_ENABLE,
282 sock->addr + SOCK_FIFO_CONTROL);
283
284 if (host->use_dma) {
285 if (1 != tifm_map_sg(sock, &host->req->sg, 1,
286 host->req->data_dir == READ
287 ? PCI_DMA_FROMDEVICE
288 : PCI_DMA_TODEVICE)) {
289 host->req->error = -ENOMEM;
290 return host->req->error;
291 }
292 data_len = sg_dma_len(&host->req->sg);
293
294 writel(ilog2(data_len) - 2,
295 sock->addr + SOCK_FIFO_PAGE_SIZE);
296 writel(TIFM_FIFO_INTMASK,
297 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
298 sys_param = TIFM_DMA_EN | (1 << 8);
299 if (host->req->data_dir == WRITE)
300 sys_param |= TIFM_DMA_TX;
301
302 writel(TIFM_FIFO_INTMASK,
303 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
304
305 writel(sg_dma_address(&host->req->sg),
306 sock->addr + SOCK_DMA_ADDRESS);
307 writel(sys_param, sock->addr + SOCK_DMA_CONTROL);
308 } else {
309 writel(host->mode_mask | TIFM_MS_SYS_FIFO,
310 sock->addr + SOCK_MS_SYSTEM);
311
312 writel(TIFM_FIFO_MORE,
313 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
314 }
315
316 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
317 writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
318 sock->addr + SOCK_CONTROL);
319 host->req->error = 0;
320
321 sys_param = readl(sock->addr + SOCK_MS_SYSTEM);
322 sys_param |= TIFM_MS_SYS_INTCLR;
323
324 if (host->use_dma)
325 sys_param |= TIFM_MS_SYS_DMA;
326 else
327 sys_param &= ~TIFM_MS_SYS_DMA;
328
329 writel(sys_param, sock->addr + SOCK_MS_SYSTEM);
330
331 cmd = (host->req->tpc & 0xf) << 12;
332 cmd |= data_len;
333 writel(cmd, sock->addr + SOCK_MS_COMMAND);
334
335 dev_dbg(&sock->dev, "executing TPC %x, %x\n", cmd, sys_param);
336 return 0;
337}
338
339static void tifm_ms_complete_cmd(struct tifm_ms *host)
340{
341 struct tifm_dev *sock = host->dev;
342 struct memstick_host *msh = tifm_get_drvdata(sock);
343 int rc;
344
345 del_timer(&host->timer);
346
347 host->req->int_reg = readl(sock->addr + SOCK_MS_STATUS) & 0xff;
348 host->req->int_reg = (host->req->int_reg & 1)
349 | ((host->req->int_reg << 4) & 0xe0);
350
351 writel(TIFM_FIFO_INT_SETALL,
352 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
353 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
354
355 if (host->use_dma) {
356 tifm_unmap_sg(sock, &host->req->sg, 1,
357 host->req->data_dir == READ
358 ? PCI_DMA_FROMDEVICE
359 : PCI_DMA_TODEVICE);
360 }
361
362 writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
363 sock->addr + SOCK_CONTROL);
364
365 dev_dbg(&sock->dev, "TPC complete\n");
366 do {
367 rc = memstick_next_req(msh, &host->req);
368 } while (!rc && tifm_ms_issue_cmd(host));
369}
370
371static int tifm_ms_check_status(struct tifm_ms *host)
372{
373 if (!host->req->error) {
374 if (!(host->cmd_flags & CMD_READY))
375 return 1;
376 if (!(host->cmd_flags & FIFO_READY))
377 return 1;
378 if (host->req->need_card_int
379 && !(host->cmd_flags & CARD_INT))
380 return 1;
381 }
382 return 0;
383}
384
385
386static void tifm_ms_data_event(struct tifm_dev *sock)
387{
388 struct tifm_ms *host;
389 unsigned int fifo_status = 0, host_status = 0;
390 int rc = 1;
391
392 spin_lock(&sock->lock);
393 host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
394 fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
395 host_status = readl(sock->addr + SOCK_MS_STATUS);
396 dev_dbg(&sock->dev,
397 "data event: fifo_status %x, host_status %x, flags %x\n",
398 fifo_status, host_status, host->cmd_flags);
399
400 if (host->req) {
401 if (host->use_dma && (fifo_status & 1)) {
402 host->cmd_flags |= FIFO_READY;
403 rc = tifm_ms_check_status(host);
404 }
405 if (!host->use_dma && (fifo_status & TIFM_FIFO_MORE)) {
406 if (!tifm_ms_transfer_data(host)) {
407 host->cmd_flags |= FIFO_READY;
408 rc = tifm_ms_check_status(host);
409 }
410 }
411 }
412
413 writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
414 if (!rc)
415 tifm_ms_complete_cmd(host);
416
417 spin_unlock(&sock->lock);
418}
419
420
421
422static void tifm_ms_card_event(struct tifm_dev *sock)
423{
424 struct tifm_ms *host;
425 unsigned int host_status = 0;
426 int rc = 1;
427
428 spin_lock(&sock->lock);
429 host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
430 host_status = readl(sock->addr + SOCK_MS_STATUS);
431 dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
432 host_status, host->cmd_flags);
433
434 if (host->req) {
435 if (host_status & TIFM_MS_STAT_TOE)
436 host->req->error = -ETIME;
437 else if (host_status & TIFM_MS_STAT_CRC)
438 host->req->error = -EILSEQ;
439
440 if (host_status & TIFM_MS_STAT_RDY)
441 host->cmd_flags |= CMD_READY;
442
443 if (host_status & TIFM_MS_STAT_MSINT)
444 host->cmd_flags |= CARD_INT;
445
446 rc = tifm_ms_check_status(host);
447
448 }
449
450 writel(TIFM_MS_SYS_INTCLR | readl(sock->addr + SOCK_MS_SYSTEM),
451 sock->addr + SOCK_MS_SYSTEM);
452
453 if (!rc)
454 tifm_ms_complete_cmd(host);
455
456 spin_unlock(&sock->lock);
457 return;
458}
459
460static void tifm_ms_req_tasklet(unsigned long data)
461{
462 struct memstick_host *msh = (struct memstick_host *)data;
463 struct tifm_ms *host = memstick_priv(msh);
464 struct tifm_dev *sock = host->dev;
465 unsigned long flags;
466 int rc;
467
468 spin_lock_irqsave(&sock->lock, flags);
469 if (!host->req) {
470 if (host->eject) {
471 do {
472 rc = memstick_next_req(msh, &host->req);
473 if (!rc)
474 host->req->error = -ETIME;
475 } while (!rc);
476 spin_unlock_irqrestore(&sock->lock, flags);
477 return;
478 }
479
480 do {
481 rc = memstick_next_req(msh, &host->req);
482 } while (!rc && tifm_ms_issue_cmd(host));
483 }
484 spin_unlock_irqrestore(&sock->lock, flags);
485}
486
487static void tifm_ms_dummy_submit(struct memstick_host *msh)
488{
489 return;
490}
491
492static void tifm_ms_submit_req(struct memstick_host *msh)
493{
494 struct tifm_ms *host = memstick_priv(msh);
495
496 tasklet_schedule(&host->notify);
497}
498
499static int tifm_ms_set_param(struct memstick_host *msh,
500 enum memstick_param param,
501 int value)
502{
503 struct tifm_ms *host = memstick_priv(msh);
504 struct tifm_dev *sock = host->dev;
505
506 switch (param) {
507 case MEMSTICK_POWER:
508
509 if (value == MEMSTICK_POWER_ON) {
510 host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
511 writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM);
512 writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
513 sock->addr + SOCK_MS_SYSTEM);
514 writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
515 } else if (value == MEMSTICK_POWER_OFF) {
516 writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
517 sock->addr + SOCK_MS_SYSTEM);
518 writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
519 } else
520 return -EINVAL;
521 break;
522 case MEMSTICK_INTERFACE:
523 if (value == MEMSTICK_SERIAL) {
524 host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
525 writel((~TIFM_CTRL_FAST_CLK)
526 & readl(sock->addr + SOCK_CONTROL),
527 sock->addr + SOCK_CONTROL);
528 } else if (value == MEMSTICK_PAR4) {
529 host->mode_mask = 0;
530 writel(TIFM_CTRL_FAST_CLK
531 | readl(sock->addr + SOCK_CONTROL),
532 sock->addr + SOCK_CONTROL);
533 } else
534 return -EINVAL;
535 break;
536 };
537
538 return 0;
539}
540
541static void tifm_ms_abort(unsigned long data)
542{
543 struct tifm_ms *host = (struct tifm_ms *)data;
544
545 dev_dbg(&host->dev->dev, "status %x\n",
546 readl(host->dev->addr + SOCK_MS_STATUS));
547 printk(KERN_ERR
548 "%s : card failed to respond for a long period of time "
549 "(%x, %x)\n",
550 dev_name(&host->dev->dev), host->req ? host->req->tpc : 0,
551 host->cmd_flags);
552
553 tifm_eject(host->dev);
554}
555
556static int tifm_ms_probe(struct tifm_dev *sock)
557{
558 struct memstick_host *msh;
559 struct tifm_ms *host;
560 int rc = -EIO;
561
562 if (!(TIFM_SOCK_STATE_OCCUPIED
563 & readl(sock->addr + SOCK_PRESENT_STATE))) {
564 printk(KERN_WARNING "%s : card gone, unexpectedly\n",
565 dev_name(&sock->dev));
566 return rc;
567 }
568
569 msh = memstick_alloc_host(sizeof(struct tifm_ms), &sock->dev);
570 if (!msh)
571 return -ENOMEM;
572
573 host = memstick_priv(msh);
574 tifm_set_drvdata(sock, msh);
575 host->dev = sock;
576 host->timeout_jiffies = msecs_to_jiffies(1000);
577
578 setup_timer(&host->timer, tifm_ms_abort, (unsigned long)host);
579 tasklet_init(&host->notify, tifm_ms_req_tasklet, (unsigned long)msh);
580
581 msh->request = tifm_ms_submit_req;
582 msh->set_param = tifm_ms_set_param;
583 sock->card_event = tifm_ms_card_event;
584 sock->data_event = tifm_ms_data_event;
585 if (tifm_has_ms_pif(sock))
586 msh->caps |= MEMSTICK_CAP_PAR4;
587
588 rc = memstick_add_host(msh);
589 if (!rc)
590 return 0;
591
592 memstick_free_host(msh);
593 return rc;
594}
595
596static void tifm_ms_remove(struct tifm_dev *sock)
597{
598 struct memstick_host *msh = tifm_get_drvdata(sock);
599 struct tifm_ms *host = memstick_priv(msh);
600 int rc = 0;
601 unsigned long flags;
602
603 msh->request = tifm_ms_dummy_submit;
604 tasklet_kill(&host->notify);
605 spin_lock_irqsave(&sock->lock, flags);
606 host->eject = 1;
607 if (host->req) {
608 del_timer(&host->timer);
609 writel(TIFM_FIFO_INT_SETALL,
610 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
611 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
612 if (host->use_dma)
613 tifm_unmap_sg(sock, &host->req->sg, 1,
614 host->req->data_dir == READ
615 ? PCI_DMA_TODEVICE
616 : PCI_DMA_FROMDEVICE);
617 host->req->error = -ETIME;
618
619 do {
620 rc = memstick_next_req(msh, &host->req);
621 if (!rc)
622 host->req->error = -ETIME;
623 } while (!rc);
624 }
625 spin_unlock_irqrestore(&sock->lock, flags);
626
627 memstick_remove_host(msh);
628 memstick_free_host(msh);
629}
630
631#ifdef CONFIG_PM
632
633static int tifm_ms_suspend(struct tifm_dev *sock, pm_message_t state)
634{
635 struct memstick_host *msh = tifm_get_drvdata(sock);
636
637 memstick_suspend_host(msh);
638 return 0;
639}
640
641static int tifm_ms_resume(struct tifm_dev *sock)
642{
643 struct memstick_host *msh = tifm_get_drvdata(sock);
644
645 memstick_resume_host(msh);
646 return 0;
647}
648
649#else
650
651#define tifm_ms_suspend NULL
652#define tifm_ms_resume NULL
653
654#endif
655
656static struct tifm_device_id tifm_ms_id_tbl[] = {
657 { TIFM_TYPE_MS }, { 0 }
658};
659
660static struct tifm_driver tifm_ms_driver = {
661 .driver = {
662 .name = DRIVER_NAME,
663 .owner = THIS_MODULE
664 },
665 .id_table = tifm_ms_id_tbl,
666 .probe = tifm_ms_probe,
667 .remove = tifm_ms_remove,
668 .suspend = tifm_ms_suspend,
669 .resume = tifm_ms_resume
670};
671
672static int __init tifm_ms_init(void)
673{
674 return tifm_register_driver(&tifm_ms_driver);
675}
676
677static void __exit tifm_ms_exit(void)
678{
679 tifm_unregister_driver(&tifm_ms_driver);
680}
681
682MODULE_AUTHOR("Alex Dubov");
683MODULE_DESCRIPTION("TI FlashMedia MemoryStick driver");
684MODULE_LICENSE("GPL");
685MODULE_DEVICE_TABLE(tifm, tifm_ms_id_tbl);
686
687module_init(tifm_ms_init);
688module_exit(tifm_ms_exit);
689
