?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / memstick / host / jmb38x_ms.c
blob5319e9b65847e0749b033f6e55a5d0a82261ef21
1 /*
2 * jmb38x_ms.c - JMicron jmb38x MemoryStick card reader
3 *
4 * Copyright (C) 2008 Alex Dubov <oakad@yahoo.com>
5 *
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.
9 *
10 */
11
12 #include <linux/spinlock.h>
13 #include <linux/interrupt.h>
14 #include <linux/pci.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/delay.h>
17 #include <linux/highmem.h>
18 #include <linux/memstick.h>
19 #include <linux/slab.h>
20 #include <linux/module.h>
21
22 #define DRIVER_NAME "jmb38x_ms"
23
24 static bool no_dma;
25 module_param(no_dma, bool, 0644);
26
27 enum {
28 DMA_ADDRESS = 0x00,
29 BLOCK = 0x04,
30 DMA_CONTROL = 0x08,
31 TPC_P0 = 0x0c,
32 TPC_P1 = 0x10,
33 TPC = 0x14,
34 HOST_CONTROL = 0x18,
35 DATA = 0x1c,
36 STATUS = 0x20,
37 INT_STATUS = 0x24,
38 INT_STATUS_ENABLE = 0x28,
39 INT_SIGNAL_ENABLE = 0x2c,
40 TIMER = 0x30,
41 TIMER_CONTROL = 0x34,
42 PAD_OUTPUT_ENABLE = 0x38,
43 PAD_PU_PD = 0x3c,
44 CLOCK_DELAY = 0x40,
45 ADMA_ADDRESS = 0x44,
46 CLOCK_CONTROL = 0x48,
47 LED_CONTROL = 0x4c,
48 VERSION = 0x50
49 };
50
51 struct jmb38x_ms_host {
52 struct jmb38x_ms *chip;
53 void __iomem *addr;
54 spinlock_t lock;
55 struct tasklet_struct notify;
56 int id;
57 char host_id[32];
58 int irq;
59 unsigned int block_pos;
60 unsigned long timeout_jiffies;
61 struct timer_list timer;
62 struct memstick_request *req;
63 unsigned char cmd_flags;
64 unsigned char io_pos;
65 unsigned char ifmode;
66 unsigned int io_word[2];
67 };
68
69 struct jmb38x_ms {
70 struct pci_dev *pdev;
71 int host_cnt;
72 struct memstick_host *hosts[];
73 };
74
75 #define BLOCK_COUNT_MASK 0xffff0000
76 #define BLOCK_SIZE_MASK 0x00000fff
77
78 #define DMA_CONTROL_ENABLE 0x00000001
79
80 #define TPC_DATA_SEL 0x00008000
81 #define TPC_DIR 0x00004000
82 #define TPC_WAIT_INT 0x00002000
83 #define TPC_GET_INT 0x00000800
84 #define TPC_CODE_SZ_MASK 0x00000700
85 #define TPC_DATA_SZ_MASK 0x00000007
86
87 #define HOST_CONTROL_TDELAY_EN 0x00040000
88 #define HOST_CONTROL_HW_OC_P 0x00010000
89 #define HOST_CONTROL_RESET_REQ 0x00008000
90 #define HOST_CONTROL_REI 0x00004000
91 #define HOST_CONTROL_LED 0x00000400
92 #define HOST_CONTROL_FAST_CLK 0x00000200
93 #define HOST_CONTROL_RESET 0x00000100
94 #define HOST_CONTROL_POWER_EN 0x00000080
95 #define HOST_CONTROL_CLOCK_EN 0x00000040
96 #define HOST_CONTROL_REO 0x00000008
97 #define HOST_CONTROL_IF_SHIFT 4
98
99 #define HOST_CONTROL_IF_SERIAL 0x0
100 #define HOST_CONTROL_IF_PAR4 0x1
101 #define HOST_CONTROL_IF_PAR8 0x3
102
103 #define STATUS_BUSY 0x00080000
104 #define STATUS_MS_DAT7 0x00040000
105 #define STATUS_MS_DAT6 0x00020000
106 #define STATUS_MS_DAT5 0x00010000
107 #define STATUS_MS_DAT4 0x00008000
108 #define STATUS_MS_DAT3 0x00004000
109 #define STATUS_MS_DAT2 0x00002000
110 #define STATUS_MS_DAT1 0x00001000
111 #define STATUS_MS_DAT0 0x00000800
112 #define STATUS_HAS_MEDIA 0x00000400
113 #define STATUS_FIFO_EMPTY 0x00000200
114 #define STATUS_FIFO_FULL 0x00000100
115 #define STATUS_MS_CED 0x00000080
116 #define STATUS_MS_ERR 0x00000040
117 #define STATUS_MS_BRQ 0x00000020
118 #define STATUS_MS_CNK 0x00000001
119
120 #define INT_STATUS_TPC_ERR 0x00080000
121 #define INT_STATUS_CRC_ERR 0x00040000
122 #define INT_STATUS_TIMER_TO 0x00020000
123 #define INT_STATUS_HSK_TO 0x00010000
124 #define INT_STATUS_ANY_ERR 0x00008000
125 #define INT_STATUS_FIFO_WRDY 0x00000080
126 #define INT_STATUS_FIFO_RRDY 0x00000040
127 #define INT_STATUS_MEDIA_OUT 0x00000010
128 #define INT_STATUS_MEDIA_IN 0x00000008
129 #define INT_STATUS_DMA_BOUNDARY 0x00000004
130 #define INT_STATUS_EOTRAN 0x00000002
131 #define INT_STATUS_EOTPC 0x00000001
132
133 #define INT_STATUS_ALL 0x000f801f
134
135 #define PAD_OUTPUT_ENABLE_MS 0x0F3F
136
137 #define PAD_PU_PD_OFF 0x7FFF0000
138 #define PAD_PU_PD_ON_MS_SOCK0 0x5f8f0000
139 #define PAD_PU_PD_ON_MS_SOCK1 0x0f0f0000
140
141 #define CLOCK_CONTROL_BY_MMIO 0x00000008
142 #define CLOCK_CONTROL_40MHZ 0x00000001
143 #define CLOCK_CONTROL_50MHZ 0x00000002
144 #define CLOCK_CONTROL_60MHZ 0x00000010
145 #define CLOCK_CONTROL_62_5MHZ 0x00000004
146 #define CLOCK_CONTROL_OFF 0x00000000
147
148 #define PCI_CTL_CLOCK_DLY_ADDR 0x000000b0
149
150 enum {
151 CMD_READY = 0x01,
152 FIFO_READY = 0x02,
153 REG_DATA = 0x04,
154 DMA_DATA = 0x08
155 };
156
157 static unsigned int jmb38x_ms_read_data(struct jmb38x_ms_host *host,
158 unsigned char *buf, unsigned int length)
159 {
160 unsigned int off = 0;
161
162 while (host->io_pos && length) {
163 buf[off++] = host->io_word[0] & 0xff;
164 host->io_word[0] >>= 8;
165 length--;
166 host->io_pos--;
167 }
168
169 if (!length)
170 return off;
171
172 while (!(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
173 if (length < 4)
174 break;
175 *(unsigned int *)(buf + off) = __raw_readl(host->addr + DATA);
176 length -= 4;
177 off += 4;
178 }
179
180 if (length
181 && !(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
182 host->io_word[0] = readl(host->addr + DATA);
183 for (host->io_pos = 4; host->io_pos; --host->io_pos) {
184 buf[off++] = host->io_word[0] & 0xff;
185 host->io_word[0] >>= 8;
186 length--;
187 if (!length)
188 break;
189 }
190 }
191
192 return off;
193 }
194
195 static unsigned int jmb38x_ms_read_reg_data(struct jmb38x_ms_host *host,
196 unsigned char *buf,
197 unsigned int length)
198 {
199 unsigned int off = 0;
200
201 while (host->io_pos > 4 && length) {
202 buf[off++] = host->io_word[0] & 0xff;
203 host->io_word[0] >>= 8;
204 length--;
205 host->io_pos--;
206 }
207
208 if (!length)
209 return off;
210
211 while (host->io_pos && length) {
212 buf[off++] = host->io_word[1] & 0xff;
213 host->io_word[1] >>= 8;
214 length--;
215 host->io_pos--;
216 }
217
218 return off;
219 }
220
221 static unsigned int jmb38x_ms_write_data(struct jmb38x_ms_host *host,
222 unsigned char *buf,
223 unsigned int length)
224 {
225 unsigned int off = 0;
226
227 if (host->io_pos) {
228 while (host->io_pos < 4 && length) {
229 host->io_word[0] |= buf[off++] << (host->io_pos * 8);
230 host->io_pos++;
231 length--;
232 }
233 }
234
235 if (host->io_pos == 4
236 && !(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
237 writel(host->io_word[0], host->addr + DATA);
238 host->io_pos = 0;
239 host->io_word[0] = 0;
240 } else if (host->io_pos) {
241 return off;
242 }
243
244 if (!length)
245 return off;
246
247 while (!(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
248 if (length < 4)
249 break;
250
251 __raw_writel(*(unsigned int *)(buf + off),
252 host->addr + DATA);
253 length -= 4;
254 off += 4;
255 }
256
257 switch (length) {
258 case 3:
259 host->io_word[0] |= buf[off + 2] << 16;
260 host->io_pos++;
261 case 2:
262 host->io_word[0] |= buf[off + 1] << 8;
263 host->io_pos++;
264 case 1:
265 host->io_word[0] |= buf[off];
266 host->io_pos++;
267 }
268
269 off += host->io_pos;
270
271 return off;
272 }
273
274 static unsigned int jmb38x_ms_write_reg_data(struct jmb38x_ms_host *host,
275 unsigned char *buf,
276 unsigned int length)
277 {
278 unsigned int off = 0;
279
280 while (host->io_pos < 4 && length) {
281 host->io_word[0] &= ~(0xff << (host->io_pos * 8));
282 host->io_word[0] |= buf[off++] << (host->io_pos * 8);
283 host->io_pos++;
284 length--;
285 }
286
287 if (!length)
288 return off;
289
290 while (host->io_pos < 8 && length) {
291 host->io_word[1] &= ~(0xff << (host->io_pos * 8));
292 host->io_word[1] |= buf[off++] << (host->io_pos * 8);
293 host->io_pos++;
294 length--;
295 }
296
297 return off;
298 }
299
300 static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host)
301 {
302 unsigned int length;
303 unsigned int off;
304 unsigned int t_size, p_cnt;
305 unsigned char *buf;
306 struct page *pg;
307 unsigned long flags = 0;
308
309 if (host->req->long_data) {
310 length = host->req->sg.length - host->block_pos;
311 off = host->req->sg.offset + host->block_pos;
312 } else {
313 length = host->req->data_len - host->block_pos;
314 off = 0;
315 }
316
317 while (length) {
318 unsigned int uninitialized_var(p_off);
319
320 if (host->req->long_data) {
321 pg = nth_page(sg_page(&host->req->sg),
322 off >> PAGE_SHIFT);
323 p_off = offset_in_page(off);
324 p_cnt = PAGE_SIZE - p_off;
325 p_cnt = min(p_cnt, length);
326
327 local_irq_save(flags);
328 buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + p_off;
329 } else {
330 buf = host->req->data + host->block_pos;
331 p_cnt = host->req->data_len - host->block_pos;
332 }
333
334 if (host->req->data_dir == WRITE)
335 t_size = !(host->cmd_flags & REG_DATA)
336 ? jmb38x_ms_write_data(host, buf, p_cnt)
337 : jmb38x_ms_write_reg_data(host, buf, p_cnt);
338 else
339 t_size = !(host->cmd_flags & REG_DATA)
340 ? jmb38x_ms_read_data(host, buf, p_cnt)
341 : jmb38x_ms_read_reg_data(host, buf, p_cnt);
342
343 if (host->req->long_data) {
344 kunmap_atomic(buf - p_off, KM_BIO_SRC_IRQ);
345 local_irq_restore(flags);
346 }
347
348 if (!t_size)
349 break;
350 host->block_pos += t_size;
351 length -= t_size;
352 off += t_size;
353 }
354
355 if (!length && host->req->data_dir == WRITE) {
356 if (host->cmd_flags & REG_DATA) {
357 writel(host->io_word[0], host->addr + TPC_P0);
358 writel(host->io_word[1], host->addr + TPC_P1);
359 } else if (host->io_pos) {
360 writel(host->io_word[0], host->addr + DATA);
361 }
362 }
363
364 return length;
365 }
366
367 static int jmb38x_ms_issue_cmd(struct memstick_host *msh)
368 {
369 struct jmb38x_ms_host *host = memstick_priv(msh);
370 unsigned char *data;
371 unsigned int data_len, cmd, t_val;
372
373 if (!(STATUS_HAS_MEDIA & readl(host->addr + STATUS))) {
374 dev_dbg(&msh->dev, "no media status\n");
375 host->req->error = -ETIME;
376 return host->req->error;
377 }
378
379 dev_dbg(&msh->dev, "control %08x\n", readl(host->addr + HOST_CONTROL));
380 dev_dbg(&msh->dev, "status %08x\n", readl(host->addr + INT_STATUS));
381 dev_dbg(&msh->dev, "hstatus %08x\n", readl(host->addr + STATUS));
382
383 host->cmd_flags = 0;
384 host->block_pos = 0;
385 host->io_pos = 0;
386 host->io_word[0] = 0;
387 host->io_word[1] = 0;
388
389 cmd = host->req->tpc << 16;
390 cmd |= TPC_DATA_SEL;
391
392 if (host->req->data_dir == READ)
393 cmd |= TPC_DIR;
394
395 if (host->req->need_card_int) {
396 if (host->ifmode == MEMSTICK_SERIAL)
397 cmd |= TPC_GET_INT;
398 else
399 cmd |= TPC_WAIT_INT;
400 }
401
402 data = host->req->data;
403
404 if (!no_dma)
405 host->cmd_flags |= DMA_DATA;
406
407 if (host->req->long_data) {
408 data_len = host->req->sg.length;
409 } else {
410 data_len = host->req->data_len;
411 host->cmd_flags &= ~DMA_DATA;
412 }
413
414 if (data_len <= 8) {
415 cmd &= ~(TPC_DATA_SEL | 0xf);
416 host->cmd_flags |= REG_DATA;
417 cmd |= data_len & 0xf;
418 host->cmd_flags &= ~DMA_DATA;
419 }
420
421 if (host->cmd_flags & DMA_DATA) {
422 if (1 != pci_map_sg(host->chip->pdev, &host->req->sg, 1,
423 host->req->data_dir == READ
424 ? PCI_DMA_FROMDEVICE
425 : PCI_DMA_TODEVICE)) {
426 host->req->error = -ENOMEM;
427 return host->req->error;
428 }
429 data_len = sg_dma_len(&host->req->sg);
430 writel(sg_dma_address(&host->req->sg),
431 host->addr + DMA_ADDRESS);
432 writel(((1 << 16) & BLOCK_COUNT_MASK)
433 | (data_len & BLOCK_SIZE_MASK),
434 host->addr + BLOCK);
435 writel(DMA_CONTROL_ENABLE, host->addr + DMA_CONTROL);
436 } else if (!(host->cmd_flags & REG_DATA)) {
437 writel(((1 << 16) & BLOCK_COUNT_MASK)
438 | (data_len & BLOCK_SIZE_MASK),
439 host->addr + BLOCK);
440 t_val = readl(host->addr + INT_STATUS_ENABLE);
441 t_val |= host->req->data_dir == READ
442 ? INT_STATUS_FIFO_RRDY
443 : INT_STATUS_FIFO_WRDY;
444
445 writel(t_val, host->addr + INT_STATUS_ENABLE);
446 writel(t_val, host->addr + INT_SIGNAL_ENABLE);
447 } else {
448 cmd &= ~(TPC_DATA_SEL | 0xf);
449 host->cmd_flags |= REG_DATA;
450 cmd |= data_len & 0xf;
451
452 if (host->req->data_dir == WRITE) {
453 jmb38x_ms_transfer_data(host);
454 writel(host->io_word[0], host->addr + TPC_P0);
455 writel(host->io_word[1], host->addr + TPC_P1);
456 }
457 }
458
459 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
460 writel(HOST_CONTROL_LED | readl(host->addr + HOST_CONTROL),
461 host->addr + HOST_CONTROL);
462 host->req->error = 0;
463
464 writel(cmd, host->addr + TPC);
465 dev_dbg(&msh->dev, "executing TPC %08x, len %x\n", cmd, data_len);
466
467 return 0;
468 }
469
470 static void jmb38x_ms_complete_cmd(struct memstick_host *msh, int last)
471 {
472 struct jmb38x_ms_host *host = memstick_priv(msh);
473 unsigned int t_val = 0;
474 int rc;
475
476 del_timer(&host->timer);
477
478 dev_dbg(&msh->dev, "c control %08x\n",
479 readl(host->addr + HOST_CONTROL));
480 dev_dbg(&msh->dev, "c status %08x\n",
481 readl(host->addr + INT_STATUS));
482 dev_dbg(&msh->dev, "c hstatus %08x\n", readl(host->addr + STATUS));
483
484 host->req->int_reg = readl(host->addr + STATUS) & 0xff;
485
486 writel(0, host->addr + BLOCK);
487 writel(0, host->addr + DMA_CONTROL);
488
489 if (host->cmd_flags & DMA_DATA) {
490 pci_unmap_sg(host->chip->pdev, &host->req->sg, 1,
491 host->req->data_dir == READ
492 ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
493 } else {
494 t_val = readl(host->addr + INT_STATUS_ENABLE);
495 if (host->req->data_dir == READ)
496 t_val &= ~INT_STATUS_FIFO_RRDY;
497 else
498 t_val &= ~INT_STATUS_FIFO_WRDY;
499
500 writel(t_val, host->addr + INT_STATUS_ENABLE);
501 writel(t_val, host->addr + INT_SIGNAL_ENABLE);
502 }
503
504 writel((~HOST_CONTROL_LED) & readl(host->addr + HOST_CONTROL),
505 host->addr + HOST_CONTROL);
506
507 if (!last) {
508 do {
509 rc = memstick_next_req(msh, &host->req);
510 } while (!rc && jmb38x_ms_issue_cmd(msh));
511 } else {
512 do {
513 rc = memstick_next_req(msh, &host->req);
514 if (!rc)
515 host->req->error = -ETIME;
516 } while (!rc);
517 }
518 }
519
520 static irqreturn_t jmb38x_ms_isr(int irq, void *dev_id)
521 {
522 struct memstick_host *msh = dev_id;
523 struct jmb38x_ms_host *host = memstick_priv(msh);
524 unsigned int irq_status;
525
526 spin_lock(&host->lock);
527 irq_status = readl(host->addr + INT_STATUS);
528 dev_dbg(&host->chip->pdev->dev, "irq_status = %08x\n", irq_status);
529 if (irq_status == 0 || irq_status == (~0)) {
530 spin_unlock(&host->lock);
531 return IRQ_NONE;
532 }
533
534 if (host->req) {
535 if (irq_status & INT_STATUS_ANY_ERR) {
536 if (irq_status & INT_STATUS_CRC_ERR)
537 host->req->error = -EILSEQ;
538 else if (irq_status & INT_STATUS_TPC_ERR) {
539 dev_dbg(&host->chip->pdev->dev, "TPC_ERR\n");
540 jmb38x_ms_complete_cmd(msh, 0);
541 } else
542 host->req->error = -ETIME;
543 } else {
544 if (host->cmd_flags & DMA_DATA) {
545 if (irq_status & INT_STATUS_EOTRAN)
546 host->cmd_flags |= FIFO_READY;
547 } else {
548 if (irq_status & (INT_STATUS_FIFO_RRDY
549 | INT_STATUS_FIFO_WRDY))
550 jmb38x_ms_transfer_data(host);
551
552 if (irq_status & INT_STATUS_EOTRAN) {
553 jmb38x_ms_transfer_data(host);
554 host->cmd_flags |= FIFO_READY;
555 }
556 }
557
558 if (irq_status & INT_STATUS_EOTPC) {
559 host->cmd_flags |= CMD_READY;
560 if (host->cmd_flags & REG_DATA) {
561 if (host->req->data_dir == READ) {
562 host->io_word[0]
563 = readl(host->addr
564 + TPC_P0);
565 host->io_word[1]
566 = readl(host->addr
567 + TPC_P1);
568 host->io_pos = 8;
569
570 jmb38x_ms_transfer_data(host);
571 }
572 host->cmd_flags |= FIFO_READY;
573 }
574 }
575 }
576 }
577
578 if (irq_status & (INT_STATUS_MEDIA_IN | INT_STATUS_MEDIA_OUT)) {
579 dev_dbg(&host->chip->pdev->dev, "media changed\n");
580 memstick_detect_change(msh);
581 }
582
583 writel(irq_status, host->addr + INT_STATUS);
584
585 if (host->req
586 && (((host->cmd_flags & CMD_READY)
587 && (host->cmd_flags & FIFO_READY))
588 || host->req->error))
589 jmb38x_ms_complete_cmd(msh, 0);
590
591 spin_unlock(&host->lock);
592 return IRQ_HANDLED;
593 }
594
595 static void jmb38x_ms_abort(unsigned long data)
596 {
597 struct memstick_host *msh = (struct memstick_host *)data;
598 struct jmb38x_ms_host *host = memstick_priv(msh);
599 unsigned long flags;
600
601 dev_dbg(&host->chip->pdev->dev, "abort\n");
602 spin_lock_irqsave(&host->lock, flags);
603 if (host->req) {
604 host->req->error = -ETIME;
605 jmb38x_ms_complete_cmd(msh, 0);
606 }
607 spin_unlock_irqrestore(&host->lock, flags);
608 }
609
610 static void jmb38x_ms_req_tasklet(unsigned long data)
611 {
612 struct memstick_host *msh = (struct memstick_host *)data;
613 struct jmb38x_ms_host *host = memstick_priv(msh);
614 unsigned long flags;
615 int rc;
616
617 spin_lock_irqsave(&host->lock, flags);
618 if (!host->req) {
619 do {
620 rc = memstick_next_req(msh, &host->req);
621 dev_dbg(&host->chip->pdev->dev, "tasklet req %d\n", rc);
622 } while (!rc && jmb38x_ms_issue_cmd(msh));
623 }
624 spin_unlock_irqrestore(&host->lock, flags);
625 }
626
627 static void jmb38x_ms_dummy_submit(struct memstick_host *msh)
628 {
629 return;
630 }
631
632 static void jmb38x_ms_submit_req(struct memstick_host *msh)
633 {
634 struct jmb38x_ms_host *host = memstick_priv(msh);
635
636 tasklet_schedule(&host->notify);
637 }
638
639 static int jmb38x_ms_reset(struct jmb38x_ms_host *host)
640 {
641 int cnt;
642
643 writel(HOST_CONTROL_RESET_REQ | HOST_CONTROL_CLOCK_EN
644 | readl(host->addr + HOST_CONTROL),
645 host->addr + HOST_CONTROL);
646 mmiowb();
647
648 for (cnt = 0; cnt < 20; ++cnt) {
649 if (!(HOST_CONTROL_RESET_REQ
650 & readl(host->addr + HOST_CONTROL)))
651 goto reset_next;
652
653 ndelay(20);
654 }
655 dev_dbg(&host->chip->pdev->dev, "reset_req timeout\n");
656
657 reset_next:
658 writel(HOST_CONTROL_RESET | HOST_CONTROL_CLOCK_EN
659 | readl(host->addr + HOST_CONTROL),
660 host->addr + HOST_CONTROL);
661 mmiowb();
662
663 for (cnt = 0; cnt < 20; ++cnt) {
664 if (!(HOST_CONTROL_RESET
665 & readl(host->addr + HOST_CONTROL)))
666 goto reset_ok;
667
668 ndelay(20);
669 }
670 dev_dbg(&host->chip->pdev->dev, "reset timeout\n");
671 return -EIO;
672
673 reset_ok:
674 mmiowb();
675 writel(INT_STATUS_ALL, host->addr + INT_SIGNAL_ENABLE);
676 writel(INT_STATUS_ALL, host->addr + INT_STATUS_ENABLE);
677 return 0;
678 }
679
680 static int jmb38x_ms_set_param(struct memstick_host *msh,
681 enum memstick_param param,
682 int value)
683 {
684 struct jmb38x_ms_host *host = memstick_priv(msh);
685 unsigned int host_ctl = readl(host->addr + HOST_CONTROL);
686 unsigned int clock_ctl = CLOCK_CONTROL_BY_MMIO, clock_delay = 0;
687 int rc = 0;
688
689 switch (param) {
690 case MEMSTICK_POWER:
691 if (value == MEMSTICK_POWER_ON) {
692 rc = jmb38x_ms_reset(host);
693 if (rc)
694 return rc;
695
696 host_ctl = 7;
697 host_ctl |= HOST_CONTROL_POWER_EN
698 | HOST_CONTROL_CLOCK_EN;
699 writel(host_ctl, host->addr + HOST_CONTROL);
700
701 writel(host->id ? PAD_PU_PD_ON_MS_SOCK1
702 : PAD_PU_PD_ON_MS_SOCK0,
703 host->addr + PAD_PU_PD);
704
705 writel(PAD_OUTPUT_ENABLE_MS,
706 host->addr + PAD_OUTPUT_ENABLE);
707
708 msleep(10);
709 dev_dbg(&host->chip->pdev->dev, "power on\n");
710 } else if (value == MEMSTICK_POWER_OFF) {
711 host_ctl &= ~(HOST_CONTROL_POWER_EN
712 | HOST_CONTROL_CLOCK_EN);
713 writel(host_ctl, host->addr + HOST_CONTROL);
714 writel(0, host->addr + PAD_OUTPUT_ENABLE);
715 writel(PAD_PU_PD_OFF, host->addr + PAD_PU_PD);
716 dev_dbg(&host->chip->pdev->dev, "power off\n");
717 } else
718 return -EINVAL;
719 break;
720 case MEMSTICK_INTERFACE:
721 dev_dbg(&host->chip->pdev->dev,
722 "Set Host Interface Mode to %d\n", value);
723 host_ctl &= ~(HOST_CONTROL_FAST_CLK | HOST_CONTROL_REI |
724 HOST_CONTROL_REO);
725 host_ctl |= HOST_CONTROL_TDELAY_EN | HOST_CONTROL_HW_OC_P;
726 host_ctl &= ~(3 << HOST_CONTROL_IF_SHIFT);
727
728 if (value == MEMSTICK_SERIAL) {
729 host_ctl |= HOST_CONTROL_IF_SERIAL
730 << HOST_CONTROL_IF_SHIFT;
731 host_ctl |= HOST_CONTROL_REI;
732 clock_ctl |= CLOCK_CONTROL_40MHZ;
733 clock_delay = 0;
734 } else if (value == MEMSTICK_PAR4) {
735 host_ctl |= HOST_CONTROL_FAST_CLK;
736 host_ctl |= HOST_CONTROL_IF_PAR4
737 << HOST_CONTROL_IF_SHIFT;
738 host_ctl |= HOST_CONTROL_REO;
739 clock_ctl |= CLOCK_CONTROL_40MHZ;
740 clock_delay = 4;
741 } else if (value == MEMSTICK_PAR8) {
742 host_ctl |= HOST_CONTROL_FAST_CLK;
743 host_ctl |= HOST_CONTROL_IF_PAR8
744 << HOST_CONTROL_IF_SHIFT;
745 clock_ctl |= CLOCK_CONTROL_50MHZ;
746 clock_delay = 0;
747 } else
748 return -EINVAL;
749
750 writel(host_ctl, host->addr + HOST_CONTROL);
751 writel(CLOCK_CONTROL_OFF, host->addr + CLOCK_CONTROL);
752 writel(clock_ctl, host->addr + CLOCK_CONTROL);
753 pci_write_config_byte(host->chip->pdev,
754 PCI_CTL_CLOCK_DLY_ADDR + 1,
755 clock_delay);
756 host->ifmode = value;
757 break;
758 };
759 return 0;
760 }
761
762 #define PCI_PMOS0_CONTROL 0xae
763 #define PMOS0_ENABLE 0x01
764 #define PMOS0_OVERCURRENT_LEVEL_2_4V 0x06
765 #define PMOS0_EN_OVERCURRENT_DEBOUNCE 0x40
766 #define PMOS0_SW_LED_POLARITY_ENABLE 0x80
767 #define PMOS0_ACTIVE_BITS (PMOS0_ENABLE | PMOS0_EN_OVERCURRENT_DEBOUNCE | \
768 PMOS0_OVERCURRENT_LEVEL_2_4V)
769 #define PCI_PMOS1_CONTROL 0xbd
770 #define PMOS1_ACTIVE_BITS 0x4a
771 #define PCI_CLOCK_CTL 0xb9
772
773 static int jmb38x_ms_pmos(struct pci_dev *pdev, int flag)
774 {
775 unsigned char val;
776
777 pci_read_config_byte(pdev, PCI_PMOS0_CONTROL, &val);
778 if (flag)
779 val |= PMOS0_ACTIVE_BITS;
780 else
781 val &= ~PMOS0_ACTIVE_BITS;
782 pci_write_config_byte(pdev, PCI_PMOS0_CONTROL, val);
783 dev_dbg(&pdev->dev, "JMB38x: set PMOS0 val 0x%x\n", val);
784
785 if (pci_resource_flags(pdev, 1)) {
786 pci_read_config_byte(pdev, PCI_PMOS1_CONTROL, &val);
787 if (flag)
788 val |= PMOS1_ACTIVE_BITS;
789 else
790 val &= ~PMOS1_ACTIVE_BITS;
791 pci_write_config_byte(pdev, PCI_PMOS1_CONTROL, val);
792 dev_dbg(&pdev->dev, "JMB38x: set PMOS1 val 0x%x\n", val);
793 }
794
795 pci_read_config_byte(pdev, PCI_CLOCK_CTL, &val);
796 pci_write_config_byte(pdev, PCI_CLOCK_CTL, val & ~0x0f);
797 pci_write_config_byte(pdev, PCI_CLOCK_CTL, val | 0x01);
798 dev_dbg(&pdev->dev, "Clock Control by PCI config is disabled!\n");
799
800 return 0;
801 }
802
803 #ifdef CONFIG_PM
804
805 static int jmb38x_ms_suspend(struct pci_dev *dev, pm_message_t state)
806 {
807 struct jmb38x_ms *jm = pci_get_drvdata(dev);
808 int cnt;
809
810 for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
811 if (!jm->hosts[cnt])
812 break;
813 memstick_suspend_host(jm->hosts[cnt]);
814 }
815
816 pci_save_state(dev);
817 pci_enable_wake(dev, pci_choose_state(dev, state), 0);
818 pci_disable_device(dev);
819 pci_set_power_state(dev, pci_choose_state(dev, state));
820 return 0;
821 }
822
823 static int jmb38x_ms_resume(struct pci_dev *dev)
824 {
825 struct jmb38x_ms *jm = pci_get_drvdata(dev);
826 int rc;
827
828 pci_set_power_state(dev, PCI_D0);
829 pci_restore_state(dev);
830 rc = pci_enable_device(dev);
831 if (rc)
832 return rc;
833 pci_set_master(dev);
834
835 jmb38x_ms_pmos(dev, 1);
836
837 for (rc = 0; rc < jm->host_cnt; ++rc) {
838 if (!jm->hosts[rc])
839 break;
840 memstick_resume_host(jm->hosts[rc]);
841 memstick_detect_change(jm->hosts[rc]);
842 }
843
844 return 0;
845 }
846
847 #else
848
849 #define jmb38x_ms_suspend NULL
850 #define jmb38x_ms_resume NULL
851
852 #endif /* CONFIG_PM */
853
854 static int jmb38x_ms_count_slots(struct pci_dev *pdev)
855 {
856 int cnt, rc = 0;
857
858 for (cnt = 0; cnt < PCI_ROM_RESOURCE; ++cnt) {
859 if (!(IORESOURCE_MEM & pci_resource_flags(pdev, cnt)))
860 break;
861
862 if (256 != pci_resource_len(pdev, cnt))
863 break;
864
865 ++rc;
866 }
867 return rc;
868 }
869
870 static struct memstick_host *jmb38x_ms_alloc_host(struct jmb38x_ms *jm, int cnt)
871 {
872 struct memstick_host *msh;
873 struct jmb38x_ms_host *host;
874
875 msh = memstick_alloc_host(sizeof(struct jmb38x_ms_host),
876 &jm->pdev->dev);
877 if (!msh)
878 return NULL;
879
880 host = memstick_priv(msh);
881 host->chip = jm;
882 host->addr = ioremap(pci_resource_start(jm->pdev, cnt),
883 pci_resource_len(jm->pdev, cnt));
884 if (!host->addr)
885 goto err_out_free;
886
887 spin_lock_init(&host->lock);
888 host->id = cnt;
889 snprintf(host->host_id, sizeof(host->host_id), DRIVER_NAME ":slot%d",
890 host->id);
891 host->irq = jm->pdev->irq;
892 host->timeout_jiffies = msecs_to_jiffies(1000);
893
894 tasklet_init(&host->notify, jmb38x_ms_req_tasklet, (unsigned long)msh);
895 msh->request = jmb38x_ms_submit_req;
896 msh->set_param = jmb38x_ms_set_param;
897
898 msh->caps = MEMSTICK_CAP_PAR4 | MEMSTICK_CAP_PAR8;
899
900 setup_timer(&host->timer, jmb38x_ms_abort, (unsigned long)msh);
901
902 if (!request_irq(host->irq, jmb38x_ms_isr, IRQF_SHARED, host->host_id,
903 msh))
904 return msh;
905
906 iounmap(host->addr);
907 err_out_free:
908 kfree(msh);
909 return NULL;
910 }
911
912 static void jmb38x_ms_free_host(struct memstick_host *msh)
913 {
914 struct jmb38x_ms_host *host = memstick_priv(msh);
915
916 free_irq(host->irq, msh);
917 iounmap(host->addr);
918 memstick_free_host(msh);
919 }
920
921 static int jmb38x_ms_probe(struct pci_dev *pdev,
922 const struct pci_device_id *dev_id)
923 {
924 struct jmb38x_ms *jm;
925 int pci_dev_busy = 0;
926 int rc, cnt;
927
928 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
929 if (rc)
930 return rc;
931
932 rc = pci_enable_device(pdev);
933 if (rc)
934 return rc;
935
936 pci_set_master(pdev);
937
938 rc = pci_request_regions(pdev, DRIVER_NAME);
939 if (rc) {
940 pci_dev_busy = 1;
941 goto err_out;
942 }
943
944 jmb38x_ms_pmos(pdev, 1);
945
946 cnt = jmb38x_ms_count_slots(pdev);
947 if (!cnt) {
948 rc = -ENODEV;
949 pci_dev_busy = 1;
950 goto err_out;
951 }
952
953 jm = kzalloc(sizeof(struct jmb38x_ms)
954 + cnt * sizeof(struct memstick_host *), GFP_KERNEL);
955 if (!jm) {
956 rc = -ENOMEM;
957 goto err_out_int;
958 }
959
960 jm->pdev = pdev;
961 jm->host_cnt = cnt;
962 pci_set_drvdata(pdev, jm);
963
964 for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
965 jm->hosts[cnt] = jmb38x_ms_alloc_host(jm, cnt);
966 if (!jm->hosts[cnt])
967 break;
968
969 rc = memstick_add_host(jm->hosts[cnt]);
970
971 if (rc) {
972 jmb38x_ms_free_host(jm->hosts[cnt]);
973 jm->hosts[cnt] = NULL;
974 break;
975 }
976 }
977
978 if (cnt)
979 return 0;
980
981 rc = -ENODEV;
982
983 pci_set_drvdata(pdev, NULL);
984 kfree(jm);
985 err_out_int:
986 pci_release_regions(pdev);
987 err_out:
988 if (!pci_dev_busy)
989 pci_disable_device(pdev);
990 return rc;
991 }
992
993 static void jmb38x_ms_remove(struct pci_dev *dev)
994 {
995 struct jmb38x_ms *jm = pci_get_drvdata(dev);
996 struct jmb38x_ms_host *host;
997 int cnt;
998 unsigned long flags;
999
1000 for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
1001 if (!jm->hosts[cnt])
1002 break;
1003
1004 host = memstick_priv(jm->hosts[cnt]);
1005
1006 jm->hosts[cnt]->request = jmb38x_ms_dummy_submit;
1007 tasklet_kill(&host->notify);
1008 writel(0, host->addr + INT_SIGNAL_ENABLE);
1009 writel(0, host->addr + INT_STATUS_ENABLE);
1010 mmiowb();
1011 dev_dbg(&jm->pdev->dev, "interrupts off\n");
1012 spin_lock_irqsave(&host->lock, flags);
1013 if (host->req) {
1014 host->req->error = -ETIME;
1015 jmb38x_ms_complete_cmd(jm->hosts[cnt], 1);
1016 }
1017 spin_unlock_irqrestore(&host->lock, flags);
1018
1019 memstick_remove_host(jm->hosts[cnt]);
1020 dev_dbg(&jm->pdev->dev, "host removed\n");
1021
1022 jmb38x_ms_free_host(jm->hosts[cnt]);
1023 }
1024
1025 jmb38x_ms_pmos(dev, 0);
1026
1027 pci_set_drvdata(dev, NULL);
1028 pci_release_regions(dev);
1029 pci_disable_device(dev);
1030 kfree(jm);
1031 }
1032
1033 static struct pci_device_id jmb38x_ms_id_tbl [] = {
1034 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_MS) },
1035 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB385_MS) },
1036 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB390_MS) },
1037 { }
1038 };
1039
1040 static struct pci_driver jmb38x_ms_driver = {
1041 .name = DRIVER_NAME,
1042 .id_table = jmb38x_ms_id_tbl,
1043 .probe = jmb38x_ms_probe,
1044 .remove = jmb38x_ms_remove,
1045 .suspend = jmb38x_ms_suspend,
1046 .resume = jmb38x_ms_resume
1047 };
1048
1049 static int __init jmb38x_ms_init(void)
1050 {
1051 return pci_register_driver(&jmb38x_ms_driver);
1052 }
1053
1054 static void __exit jmb38x_ms_exit(void)
1055 {
1056 pci_unregister_driver(&jmb38x_ms_driver);
1057 }
1058
1059 MODULE_AUTHOR("Alex Dubov");
1060 MODULE_DESCRIPTION("JMicron jmb38x MemoryStick driver");
1061 MODULE_LICENSE("GPL");
1062 MODULE_DEVICE_TABLE(pci, jmb38x_ms_id_tbl);
1063
1064 module_init(jmb38x_ms_init);
1065 module_exit(jmb38x_ms_exit);