perf intel-pt: Factor out intel_pt_8b_tsc()
[linux/fpc-iii.git] / drivers / memstick / host / tifm_ms.c
blob6b13ac56eb277d005f8f368d8bf2dbb46775b256
1 /*
2 * TI FlashMedia driver
4 * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Special thanks to Carlos Corbacho for providing various MemoryStick cards
11 * that made this driver possible.
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>
23 #define DRIVER_NAME "tifm_ms"
25 static bool no_dma;
26 module_param(no_dma, bool, 0644);
29 * Some control bits of TIFM appear to conform to Sony's reference design,
30 * so I'm just assuming they all are.
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
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
61 #define TIFM_MS_SYS_FIFO (TIFM_MS_SYS_INTEN | TIFM_MS_SYS_MSIEN \
62 | TIFM_MS_SYS_FCLR | TIFM_MS_SYS_BSY_MASK)
64 /* Hardware flags */
65 enum {
66 CMD_READY = 0x01,
67 FIFO_READY = 0x02,
68 CARD_INT = 0x04
71 struct 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;
86 static unsigned int tifm_ms_read_data(struct tifm_ms *host,
87 unsigned char *buf, unsigned int length)
89 struct tifm_dev *sock = host->dev;
90 unsigned int off = 0;
92 while (host->io_pos && length) {
93 buf[off++] = host->io_word & 0xff;
94 host->io_word >>= 8;
95 length--;
96 host->io_pos--;
99 if (!length)
100 return off;
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;
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;
123 return off;
126 static unsigned int tifm_ms_write_data(struct tifm_ms *host,
127 unsigned char *buf, unsigned int length)
129 struct tifm_dev *sock = host->dev;
130 unsigned int off = 0;
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--;
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;
151 if (!length)
152 return off;
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;
165 switch (length) {
166 case 3:
167 host->io_word |= buf[off + 2] << 16;
168 host->io_pos++;
169 /* fall through */
170 case 2:
171 host->io_word |= buf[off + 1] << 8;
172 host->io_pos++;
173 /* fall through */
174 case 1:
175 host->io_word |= buf[off];
176 host->io_pos++;
179 off += host->io_pos;
181 return off;
184 static unsigned int tifm_ms_transfer_data(struct tifm_ms *host)
186 struct tifm_dev *sock = host->dev;
187 unsigned int length;
188 unsigned int off;
189 unsigned int t_size, p_cnt;
190 unsigned char *buf;
191 struct page *pg;
192 unsigned long flags = 0;
194 if (host->req->long_data) {
195 length = host->req->sg.length - host->block_pos;
196 off = host->req->sg.offset + host->block_pos;
197 } else {
198 length = host->req->data_len - host->block_pos;
199 off = 0;
201 dev_dbg(&sock->dev, "fifo data transfer, %d, %d\n", length,
202 host->block_pos);
204 while (length) {
205 unsigned int uninitialized_var(p_off);
207 if (host->req->long_data) {
208 pg = nth_page(sg_page(&host->req->sg),
209 off >> PAGE_SHIFT);
210 p_off = offset_in_page(off);
211 p_cnt = PAGE_SIZE - p_off;
212 p_cnt = min(p_cnt, length);
214 local_irq_save(flags);
215 buf = kmap_atomic(pg) + p_off;
216 } else {
217 buf = host->req->data + host->block_pos;
218 p_cnt = host->req->data_len - host->block_pos;
221 t_size = host->req->data_dir == WRITE
222 ? tifm_ms_write_data(host, buf, p_cnt)
223 : tifm_ms_read_data(host, buf, p_cnt);
225 if (host->req->long_data) {
226 kunmap_atomic(buf - p_off);
227 local_irq_restore(flags);
230 if (!t_size)
231 break;
232 host->block_pos += t_size;
233 length -= t_size;
234 off += t_size;
237 dev_dbg(&sock->dev, "fifo data transfer, %d remaining\n", length);
238 if (!length && (host->req->data_dir == WRITE)) {
239 if (host->io_pos) {
240 writel(TIFM_MS_SYS_FDIR
241 | readl(sock->addr + SOCK_MS_SYSTEM),
242 sock->addr + SOCK_MS_SYSTEM);
243 writel(host->io_word, sock->addr + SOCK_MS_DATA);
245 writel(TIFM_MS_SYS_FDIR
246 | readl(sock->addr + SOCK_MS_SYSTEM),
247 sock->addr + SOCK_MS_SYSTEM);
248 writel(0, sock->addr + SOCK_MS_DATA);
249 } else {
250 readl(sock->addr + SOCK_MS_DATA);
253 return length;
256 static int tifm_ms_issue_cmd(struct tifm_ms *host)
258 struct tifm_dev *sock = host->dev;
259 unsigned int data_len, cmd, sys_param;
261 host->cmd_flags = 0;
262 host->block_pos = 0;
263 host->io_pos = 0;
264 host->io_word = 0;
265 host->cmd_flags = 0;
267 host->use_dma = !no_dma;
269 if (host->req->long_data) {
270 data_len = host->req->sg.length;
271 if (!is_power_of_2(data_len))
272 host->use_dma = 0;
273 } else {
274 data_len = host->req->data_len;
275 host->use_dma = 0;
278 writel(TIFM_FIFO_INT_SETALL,
279 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
280 writel(TIFM_FIFO_ENABLE,
281 sock->addr + SOCK_FIFO_CONTROL);
283 if (host->use_dma) {
284 if (1 != tifm_map_sg(sock, &host->req->sg, 1,
285 host->req->data_dir == READ
286 ? PCI_DMA_FROMDEVICE
287 : PCI_DMA_TODEVICE)) {
288 host->req->error = -ENOMEM;
289 return host->req->error;
291 data_len = sg_dma_len(&host->req->sg);
293 writel(ilog2(data_len) - 2,
294 sock->addr + SOCK_FIFO_PAGE_SIZE);
295 writel(TIFM_FIFO_INTMASK,
296 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
297 sys_param = TIFM_DMA_EN | (1 << 8);
298 if (host->req->data_dir == WRITE)
299 sys_param |= TIFM_DMA_TX;
301 writel(TIFM_FIFO_INTMASK,
302 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
304 writel(sg_dma_address(&host->req->sg),
305 sock->addr + SOCK_DMA_ADDRESS);
306 writel(sys_param, sock->addr + SOCK_DMA_CONTROL);
307 } else {
308 writel(host->mode_mask | TIFM_MS_SYS_FIFO,
309 sock->addr + SOCK_MS_SYSTEM);
311 writel(TIFM_FIFO_MORE,
312 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
315 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
316 writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
317 sock->addr + SOCK_CONTROL);
318 host->req->error = 0;
320 sys_param = readl(sock->addr + SOCK_MS_SYSTEM);
321 sys_param |= TIFM_MS_SYS_INTCLR;
323 if (host->use_dma)
324 sys_param |= TIFM_MS_SYS_DMA;
325 else
326 sys_param &= ~TIFM_MS_SYS_DMA;
328 writel(sys_param, sock->addr + SOCK_MS_SYSTEM);
330 cmd = (host->req->tpc & 0xf) << 12;
331 cmd |= data_len;
332 writel(cmd, sock->addr + SOCK_MS_COMMAND);
334 dev_dbg(&sock->dev, "executing TPC %x, %x\n", cmd, sys_param);
335 return 0;
338 static void tifm_ms_complete_cmd(struct tifm_ms *host)
340 struct tifm_dev *sock = host->dev;
341 struct memstick_host *msh = tifm_get_drvdata(sock);
342 int rc;
344 del_timer(&host->timer);
346 host->req->int_reg = readl(sock->addr + SOCK_MS_STATUS) & 0xff;
347 host->req->int_reg = (host->req->int_reg & 1)
348 | ((host->req->int_reg << 4) & 0xe0);
350 writel(TIFM_FIFO_INT_SETALL,
351 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
352 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
354 if (host->use_dma) {
355 tifm_unmap_sg(sock, &host->req->sg, 1,
356 host->req->data_dir == READ
357 ? PCI_DMA_FROMDEVICE
358 : PCI_DMA_TODEVICE);
361 writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
362 sock->addr + SOCK_CONTROL);
364 dev_dbg(&sock->dev, "TPC complete\n");
365 do {
366 rc = memstick_next_req(msh, &host->req);
367 } while (!rc && tifm_ms_issue_cmd(host));
370 static int tifm_ms_check_status(struct tifm_ms *host)
372 if (!host->req->error) {
373 if (!(host->cmd_flags & CMD_READY))
374 return 1;
375 if (!(host->cmd_flags & FIFO_READY))
376 return 1;
377 if (host->req->need_card_int
378 && !(host->cmd_flags & CARD_INT))
379 return 1;
381 return 0;
384 /* Called from interrupt handler */
385 static void tifm_ms_data_event(struct tifm_dev *sock)
387 struct tifm_ms *host;
388 unsigned int fifo_status = 0, host_status = 0;
389 int rc = 1;
391 spin_lock(&sock->lock);
392 host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
393 fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
394 host_status = readl(sock->addr + SOCK_MS_STATUS);
395 dev_dbg(&sock->dev,
396 "data event: fifo_status %x, host_status %x, flags %x\n",
397 fifo_status, host_status, host->cmd_flags);
399 if (host->req) {
400 if (host->use_dma && (fifo_status & 1)) {
401 host->cmd_flags |= FIFO_READY;
402 rc = tifm_ms_check_status(host);
404 if (!host->use_dma && (fifo_status & TIFM_FIFO_MORE)) {
405 if (!tifm_ms_transfer_data(host)) {
406 host->cmd_flags |= FIFO_READY;
407 rc = tifm_ms_check_status(host);
412 writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
413 if (!rc)
414 tifm_ms_complete_cmd(host);
416 spin_unlock(&sock->lock);
420 /* Called from interrupt handler */
421 static void tifm_ms_card_event(struct tifm_dev *sock)
423 struct tifm_ms *host;
424 unsigned int host_status = 0;
425 int rc = 1;
427 spin_lock(&sock->lock);
428 host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
429 host_status = readl(sock->addr + SOCK_MS_STATUS);
430 dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
431 host_status, host->cmd_flags);
433 if (host->req) {
434 if (host_status & TIFM_MS_STAT_TOE)
435 host->req->error = -ETIME;
436 else if (host_status & TIFM_MS_STAT_CRC)
437 host->req->error = -EILSEQ;
439 if (host_status & TIFM_MS_STAT_RDY)
440 host->cmd_flags |= CMD_READY;
442 if (host_status & TIFM_MS_STAT_MSINT)
443 host->cmd_flags |= CARD_INT;
445 rc = tifm_ms_check_status(host);
449 writel(TIFM_MS_SYS_INTCLR | readl(sock->addr + SOCK_MS_SYSTEM),
450 sock->addr + SOCK_MS_SYSTEM);
452 if (!rc)
453 tifm_ms_complete_cmd(host);
455 spin_unlock(&sock->lock);
456 return;
459 static void tifm_ms_req_tasklet(unsigned long data)
461 struct memstick_host *msh = (struct memstick_host *)data;
462 struct tifm_ms *host = memstick_priv(msh);
463 struct tifm_dev *sock = host->dev;
464 unsigned long flags;
465 int rc;
467 spin_lock_irqsave(&sock->lock, flags);
468 if (!host->req) {
469 if (host->eject) {
470 do {
471 rc = memstick_next_req(msh, &host->req);
472 if (!rc)
473 host->req->error = -ETIME;
474 } while (!rc);
475 spin_unlock_irqrestore(&sock->lock, flags);
476 return;
479 do {
480 rc = memstick_next_req(msh, &host->req);
481 } while (!rc && tifm_ms_issue_cmd(host));
483 spin_unlock_irqrestore(&sock->lock, flags);
486 static void tifm_ms_dummy_submit(struct memstick_host *msh)
488 return;
491 static void tifm_ms_submit_req(struct memstick_host *msh)
493 struct tifm_ms *host = memstick_priv(msh);
495 tasklet_schedule(&host->notify);
498 static int tifm_ms_set_param(struct memstick_host *msh,
499 enum memstick_param param,
500 int value)
502 struct tifm_ms *host = memstick_priv(msh);
503 struct tifm_dev *sock = host->dev;
505 switch (param) {
506 case MEMSTICK_POWER:
507 /* also affected by media detection mechanism */
508 if (value == MEMSTICK_POWER_ON) {
509 host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
510 writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM);
511 writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
512 sock->addr + SOCK_MS_SYSTEM);
513 writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
514 } else if (value == MEMSTICK_POWER_OFF) {
515 writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
516 sock->addr + SOCK_MS_SYSTEM);
517 writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
518 } else
519 return -EINVAL;
520 break;
521 case MEMSTICK_INTERFACE:
522 if (value == MEMSTICK_SERIAL) {
523 host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
524 writel((~TIFM_CTRL_FAST_CLK)
525 & readl(sock->addr + SOCK_CONTROL),
526 sock->addr + SOCK_CONTROL);
527 } else if (value == MEMSTICK_PAR4) {
528 host->mode_mask = 0;
529 writel(TIFM_CTRL_FAST_CLK
530 | readl(sock->addr + SOCK_CONTROL),
531 sock->addr + SOCK_CONTROL);
532 } else
533 return -EINVAL;
534 break;
537 return 0;
540 static void tifm_ms_abort(struct timer_list *t)
542 struct tifm_ms *host = from_timer(host, t, timer);
544 dev_dbg(&host->dev->dev, "status %x\n",
545 readl(host->dev->addr + SOCK_MS_STATUS));
546 printk(KERN_ERR
547 "%s : card failed to respond for a long period of time "
548 "(%x, %x)\n",
549 dev_name(&host->dev->dev), host->req ? host->req->tpc : 0,
550 host->cmd_flags);
552 tifm_eject(host->dev);
555 static int tifm_ms_probe(struct tifm_dev *sock)
557 struct memstick_host *msh;
558 struct tifm_ms *host;
559 int rc = -EIO;
561 if (!(TIFM_SOCK_STATE_OCCUPIED
562 & readl(sock->addr + SOCK_PRESENT_STATE))) {
563 printk(KERN_WARNING "%s : card gone, unexpectedly\n",
564 dev_name(&sock->dev));
565 return rc;
568 msh = memstick_alloc_host(sizeof(struct tifm_ms), &sock->dev);
569 if (!msh)
570 return -ENOMEM;
572 host = memstick_priv(msh);
573 tifm_set_drvdata(sock, msh);
574 host->dev = sock;
575 host->timeout_jiffies = msecs_to_jiffies(1000);
577 timer_setup(&host->timer, tifm_ms_abort, 0);
578 tasklet_init(&host->notify, tifm_ms_req_tasklet, (unsigned long)msh);
580 msh->request = tifm_ms_submit_req;
581 msh->set_param = tifm_ms_set_param;
582 sock->card_event = tifm_ms_card_event;
583 sock->data_event = tifm_ms_data_event;
584 if (tifm_has_ms_pif(sock))
585 msh->caps |= MEMSTICK_CAP_PAR4;
587 rc = memstick_add_host(msh);
588 if (!rc)
589 return 0;
591 memstick_free_host(msh);
592 return rc;
595 static void tifm_ms_remove(struct tifm_dev *sock)
597 struct memstick_host *msh = tifm_get_drvdata(sock);
598 struct tifm_ms *host = memstick_priv(msh);
599 int rc = 0;
600 unsigned long flags;
602 msh->request = tifm_ms_dummy_submit;
603 tasklet_kill(&host->notify);
604 spin_lock_irqsave(&sock->lock, flags);
605 host->eject = 1;
606 if (host->req) {
607 del_timer(&host->timer);
608 writel(TIFM_FIFO_INT_SETALL,
609 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
610 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
611 if (host->use_dma)
612 tifm_unmap_sg(sock, &host->req->sg, 1,
613 host->req->data_dir == READ
614 ? PCI_DMA_TODEVICE
615 : PCI_DMA_FROMDEVICE);
616 host->req->error = -ETIME;
618 do {
619 rc = memstick_next_req(msh, &host->req);
620 if (!rc)
621 host->req->error = -ETIME;
622 } while (!rc);
624 spin_unlock_irqrestore(&sock->lock, flags);
626 memstick_remove_host(msh);
627 memstick_free_host(msh);
630 #ifdef CONFIG_PM
632 static int tifm_ms_suspend(struct tifm_dev *sock, pm_message_t state)
634 struct memstick_host *msh = tifm_get_drvdata(sock);
636 memstick_suspend_host(msh);
637 return 0;
640 static int tifm_ms_resume(struct tifm_dev *sock)
642 struct memstick_host *msh = tifm_get_drvdata(sock);
644 memstick_resume_host(msh);
645 return 0;
648 #else
650 #define tifm_ms_suspend NULL
651 #define tifm_ms_resume NULL
653 #endif /* CONFIG_PM */
655 static struct tifm_device_id tifm_ms_id_tbl[] = {
656 { TIFM_TYPE_MS }, { 0 }
659 static struct tifm_driver tifm_ms_driver = {
660 .driver = {
661 .name = DRIVER_NAME,
662 .owner = THIS_MODULE
664 .id_table = tifm_ms_id_tbl,
665 .probe = tifm_ms_probe,
666 .remove = tifm_ms_remove,
667 .suspend = tifm_ms_suspend,
668 .resume = tifm_ms_resume
671 static int __init tifm_ms_init(void)
673 return tifm_register_driver(&tifm_ms_driver);
676 static void __exit tifm_ms_exit(void)
678 tifm_unregister_driver(&tifm_ms_driver);
681 MODULE_AUTHOR("Alex Dubov");
682 MODULE_DESCRIPTION("TI FlashMedia MemoryStick driver");
683 MODULE_LICENSE("GPL");
684 MODULE_DEVICE_TABLE(tifm, tifm_ms_id_tbl);
686 module_init(tifm_ms_init);
687 module_exit(tifm_ms_exit);