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>
22 #define DRIVER_NAME "tifm_ms"
25 module_param(no_dma
, bool, 0644);
28 * Some control bits of TIFM appear to conform to Sony's reference design,
29 * so I'm just assuming they all are.
32 #define TIFM_MS_STAT_DRQ 0x04000
33 #define TIFM_MS_STAT_MSINT 0x02000
34 #define TIFM_MS_STAT_RDY 0x01000
35 #define TIFM_MS_STAT_CRC 0x00200
36 #define TIFM_MS_STAT_TOE 0x00100
37 #define TIFM_MS_STAT_EMP 0x00020
38 #define TIFM_MS_STAT_FUL 0x00010
39 #define TIFM_MS_STAT_CED 0x00008
40 #define TIFM_MS_STAT_ERR 0x00004
41 #define TIFM_MS_STAT_BRQ 0x00002
42 #define TIFM_MS_STAT_CNK 0x00001
44 #define TIFM_MS_SYS_DMA 0x10000
45 #define TIFM_MS_SYS_RESET 0x08000
46 #define TIFM_MS_SYS_SRAC 0x04000
47 #define TIFM_MS_SYS_INTEN 0x02000
48 #define TIFM_MS_SYS_NOCRC 0x01000
49 #define TIFM_MS_SYS_INTCLR 0x00800
50 #define TIFM_MS_SYS_MSIEN 0x00400
51 #define TIFM_MS_SYS_FCLR 0x00200
52 #define TIFM_MS_SYS_FDIR 0x00100
53 #define TIFM_MS_SYS_DAM 0x00080
54 #define TIFM_MS_SYS_DRM 0x00040
55 #define TIFM_MS_SYS_DRQSL 0x00020
56 #define TIFM_MS_SYS_REI 0x00010
57 #define TIFM_MS_SYS_REO 0x00008
58 #define TIFM_MS_SYS_BSY_MASK 0x00007
60 #define TIFM_MS_SYS_FIFO (TIFM_MS_SYS_INTEN | TIFM_MS_SYS_MSIEN \
61 | TIFM_MS_SYS_FCLR | TIFM_MS_SYS_BSY_MASK)
72 struct timer_list timer
;
73 struct memstick_request
*req
;
74 struct tasklet_struct notify
;
75 unsigned int mode_mask
;
76 unsigned int block_pos
;
77 unsigned long timeout_jiffies
;
78 unsigned char eject
:1,
80 unsigned char cmd_flags
;
85 static unsigned int tifm_ms_read_data(struct tifm_ms
*host
,
86 unsigned char *buf
, unsigned int length
)
88 struct tifm_dev
*sock
= host
->dev
;
91 while (host
->io_pos
&& length
) {
92 buf
[off
++] = host
->io_word
& 0xff;
101 while (!(TIFM_MS_STAT_EMP
& readl(sock
->addr
+ SOCK_MS_STATUS
))) {
104 *(unsigned int *)(buf
+ off
) = __raw_readl(sock
->addr
111 && !(TIFM_MS_STAT_EMP
& readl(sock
->addr
+ SOCK_MS_STATUS
))) {
112 host
->io_word
= readl(sock
->addr
+ SOCK_MS_DATA
);
113 for (host
->io_pos
= 4; host
->io_pos
; --host
->io_pos
) {
114 buf
[off
++] = host
->io_word
& 0xff;
125 static unsigned int tifm_ms_write_data(struct tifm_ms
*host
,
126 unsigned char *buf
, unsigned int length
)
128 struct tifm_dev
*sock
= host
->dev
;
129 unsigned int off
= 0;
132 while (host
->io_pos
< 4 && length
) {
133 host
->io_word
|= buf
[off
++] << (host
->io_pos
* 8);
139 if (host
->io_pos
== 4
140 && !(TIFM_MS_STAT_FUL
& readl(sock
->addr
+ SOCK_MS_STATUS
))) {
141 writel(TIFM_MS_SYS_FDIR
| readl(sock
->addr
+ SOCK_MS_SYSTEM
),
142 sock
->addr
+ SOCK_MS_SYSTEM
);
143 writel(host
->io_word
, sock
->addr
+ SOCK_MS_DATA
);
146 } else if (host
->io_pos
) {
153 while (!(TIFM_MS_STAT_FUL
& readl(sock
->addr
+ SOCK_MS_STATUS
))) {
156 writel(TIFM_MS_SYS_FDIR
| readl(sock
->addr
+ SOCK_MS_SYSTEM
),
157 sock
->addr
+ SOCK_MS_SYSTEM
);
158 __raw_writel(*(unsigned int *)(buf
+ off
),
159 sock
->addr
+ SOCK_MS_DATA
);
166 host
->io_word
|= buf
[off
+ 2] << 16;
169 host
->io_word
|= buf
[off
+ 1] << 8;
172 host
->io_word
|= buf
[off
];
181 static unsigned int tifm_ms_transfer_data(struct tifm_ms
*host
)
183 struct tifm_dev
*sock
= host
->dev
;
186 unsigned int t_size
, p_cnt
;
189 unsigned long flags
= 0;
191 if (host
->req
->long_data
) {
192 length
= host
->req
->sg
.length
- host
->block_pos
;
193 off
= host
->req
->sg
.offset
+ host
->block_pos
;
195 length
= host
->req
->data_len
- host
->block_pos
;
198 dev_dbg(&sock
->dev
, "fifo data transfer, %d, %d\n", length
,
202 unsigned int uninitialized_var(p_off
);
204 if (host
->req
->long_data
) {
205 pg
= nth_page(sg_page(&host
->req
->sg
),
207 p_off
= offset_in_page(off
);
208 p_cnt
= PAGE_SIZE
- p_off
;
209 p_cnt
= min(p_cnt
, length
);
211 local_irq_save(flags
);
212 buf
= kmap_atomic(pg
, KM_BIO_SRC_IRQ
) + p_off
;
214 buf
= host
->req
->data
+ host
->block_pos
;
215 p_cnt
= host
->req
->data_len
- host
->block_pos
;
218 t_size
= host
->req
->data_dir
== WRITE
219 ? tifm_ms_write_data(host
, buf
, p_cnt
)
220 : tifm_ms_read_data(host
, buf
, p_cnt
);
222 if (host
->req
->long_data
) {
223 kunmap_atomic(buf
- p_off
, KM_BIO_SRC_IRQ
);
224 local_irq_restore(flags
);
229 host
->block_pos
+= t_size
;
234 dev_dbg(&sock
->dev
, "fifo data transfer, %d remaining\n", length
);
235 if (!length
&& (host
->req
->data_dir
== WRITE
)) {
237 writel(TIFM_MS_SYS_FDIR
238 | readl(sock
->addr
+ SOCK_MS_SYSTEM
),
239 sock
->addr
+ SOCK_MS_SYSTEM
);
240 writel(host
->io_word
, sock
->addr
+ SOCK_MS_DATA
);
242 writel(TIFM_MS_SYS_FDIR
243 | readl(sock
->addr
+ SOCK_MS_SYSTEM
),
244 sock
->addr
+ SOCK_MS_SYSTEM
);
245 writel(0, sock
->addr
+ SOCK_MS_DATA
);
247 readl(sock
->addr
+ SOCK_MS_DATA
);
253 static int tifm_ms_issue_cmd(struct tifm_ms
*host
)
255 struct tifm_dev
*sock
= host
->dev
;
257 unsigned int data_len
, cmd
, sys_param
;
265 data
= host
->req
->data
;
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
))
274 data_len
= host
->req
->data_len
;
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
);
284 if (1 != tifm_map_sg(sock
, &host
->req
->sg
, 1,
285 host
->req
->data_dir
== READ
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
);
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
;
324 sys_param
|= TIFM_MS_SYS_DMA
;
326 sys_param
&= ~TIFM_MS_SYS_DMA
;
328 writel(sys_param
, sock
->addr
+ SOCK_MS_SYSTEM
);
330 cmd
= (host
->req
->tpc
& 0xf) << 12;
332 writel(cmd
, sock
->addr
+ SOCK_MS_COMMAND
);
334 dev_dbg(&sock
->dev
, "executing TPC %x, %x\n", cmd
, sys_param
);
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
);
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
);
355 tifm_unmap_sg(sock
, &host
->req
->sg
, 1,
356 host
->req
->data_dir
== READ
361 writel((~TIFM_CTRL_LED
) & readl(sock
->addr
+ SOCK_CONTROL
),
362 sock
->addr
+ SOCK_CONTROL
);
364 dev_dbg(&sock
->dev
, "TPC complete\n");
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
))
375 if (!(host
->cmd_flags
& FIFO_READY
))
377 if (host
->req
->need_card_int
378 && !(host
->cmd_flags
& CARD_INT
))
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;
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
);
396 "data event: fifo_status %x, host_status %x, flags %x\n",
397 fifo_status
, host_status
, host
->cmd_flags
);
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
);
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;
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
);
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
);
453 tifm_ms_complete_cmd(host
);
455 spin_unlock(&sock
->lock
);
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
;
467 spin_lock_irqsave(&sock
->lock
, flags
);
471 rc
= memstick_next_req(msh
, &host
->req
);
473 host
->req
->error
= -ETIME
;
475 spin_unlock_irqrestore(&sock
->lock
, flags
);
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
)
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
,
502 struct tifm_ms
*host
= memstick_priv(msh
);
503 struct tifm_dev
*sock
= host
->dev
;
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
);
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
) {
529 writel(TIFM_CTRL_FAST_CLK
530 | readl(sock
->addr
+ SOCK_CONTROL
),
531 sock
->addr
+ SOCK_CONTROL
);
540 static void tifm_ms_abort(unsigned long data
)
542 struct tifm_ms
*host
= (struct tifm_ms
*)data
;
544 dev_dbg(&host
->dev
->dev
, "status %x\n",
545 readl(host
->dev
->addr
+ SOCK_MS_STATUS
));
547 "%s : card failed to respond for a long period of time "
549 dev_name(&host
->dev
->dev
), host
->req
? host
->req
->tpc
: 0,
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
;
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
));
568 msh
= memstick_alloc_host(sizeof(struct tifm_ms
), &sock
->dev
);
572 host
= memstick_priv(msh
);
573 tifm_set_drvdata(sock
, msh
);
575 host
->timeout_jiffies
= msecs_to_jiffies(1000);
577 setup_timer(&host
->timer
, tifm_ms_abort
, (unsigned long)host
);
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
);
591 memstick_free_host(msh
);
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
);
602 msh
->request
= tifm_ms_dummy_submit
;
603 tasklet_kill(&host
->notify
);
604 spin_lock_irqsave(&sock
->lock
, flags
);
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
);
612 tifm_unmap_sg(sock
, &host
->req
->sg
, 1,
613 host
->req
->data_dir
== READ
615 : PCI_DMA_FROMDEVICE
);
616 host
->req
->error
= -ETIME
;
619 rc
= memstick_next_req(msh
, &host
->req
);
621 host
->req
->error
= -ETIME
;
624 spin_unlock_irqrestore(&sock
->lock
, flags
);
626 memstick_remove_host(msh
);
627 memstick_free_host(msh
);
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
);
640 static int tifm_ms_resume(struct tifm_dev
*sock
)
642 struct memstick_host
*msh
= tifm_get_drvdata(sock
);
644 memstick_resume_host(msh
);
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
= {
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
);