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S3C: Backported openmoko's touchscreen filters
[linux-2.6/mini2440.git] / drivers / memstick / host / jmb38x_ms.c
blobf4a162a4bece30532ca15cf4a4f49e247787b160
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
20 #define DRIVER_NAME "jmb38x_ms"
21
22 static int no_dma;
23 module_param(no_dma, bool, 0644);
24
25 enum {
26 DMA_ADDRESS = 0x00,
27 BLOCK = 0x04,
28 DMA_CONTROL = 0x08,
29 TPC_P0 = 0x0c,
30 TPC_P1 = 0x10,
31 TPC = 0x14,
32 HOST_CONTROL = 0x18,
33 DATA = 0x1c,
34 STATUS = 0x20,
35 INT_STATUS = 0x24,
36 INT_STATUS_ENABLE = 0x28,
37 INT_SIGNAL_ENABLE = 0x2c,
38 TIMER = 0x30,
39 TIMER_CONTROL = 0x34,
40 PAD_OUTPUT_ENABLE = 0x38,
41 PAD_PU_PD = 0x3c,
42 CLOCK_DELAY = 0x40,
43 ADMA_ADDRESS = 0x44,
44 CLOCK_CONTROL = 0x48,
45 LED_CONTROL = 0x4c,
46 VERSION = 0x50
47 };
48
49 struct jmb38x_ms_host {
50 struct jmb38x_ms *chip;
51 void __iomem *addr;
52 spinlock_t lock;
53 struct tasklet_struct notify;
54 int id;
55 char host_id[32];
56 int irq;
57 unsigned int block_pos;
58 unsigned long timeout_jiffies;
59 struct timer_list timer;
60 struct memstick_request *req;
61 unsigned char cmd_flags;
62 unsigned char io_pos;
63 unsigned int io_word[2];
64 };
65
66 struct jmb38x_ms {
67 struct pci_dev *pdev;
68 int host_cnt;
69 struct memstick_host *hosts[];
70 };
71
72 #define BLOCK_COUNT_MASK 0xffff0000
73 #define BLOCK_SIZE_MASK 0x00000fff
74
75 #define DMA_CONTROL_ENABLE 0x00000001
76
77 #define TPC_DATA_SEL 0x00008000
78 #define TPC_DIR 0x00004000
79 #define TPC_WAIT_INT 0x00002000
80 #define TPC_GET_INT 0x00000800
81 #define TPC_CODE_SZ_MASK 0x00000700
82 #define TPC_DATA_SZ_MASK 0x00000007
83
84 #define HOST_CONTROL_TDELAY_EN 0x00040000
85 #define HOST_CONTROL_HW_OC_P 0x00010000
86 #define HOST_CONTROL_RESET_REQ 0x00008000
87 #define HOST_CONTROL_REI 0x00004000
88 #define HOST_CONTROL_LED 0x00000400
89 #define HOST_CONTROL_FAST_CLK 0x00000200
90 #define HOST_CONTROL_RESET 0x00000100
91 #define HOST_CONTROL_POWER_EN 0x00000080
92 #define HOST_CONTROL_CLOCK_EN 0x00000040
93 #define HOST_CONTROL_REO 0x00000008
94 #define HOST_CONTROL_IF_SHIFT 4
95
96 #define HOST_CONTROL_IF_SERIAL 0x0
97 #define HOST_CONTROL_IF_PAR4 0x1
98 #define HOST_CONTROL_IF_PAR8 0x3
99
100 #define STATUS_BUSY 0x00080000
101 #define STATUS_MS_DAT7 0x00040000
102 #define STATUS_MS_DAT6 0x00020000
103 #define STATUS_MS_DAT5 0x00010000
104 #define STATUS_MS_DAT4 0x00008000
105 #define STATUS_MS_DAT3 0x00004000
106 #define STATUS_MS_DAT2 0x00002000
107 #define STATUS_MS_DAT1 0x00001000
108 #define STATUS_MS_DAT0 0x00000800
109 #define STATUS_HAS_MEDIA 0x00000400
110 #define STATUS_FIFO_EMPTY 0x00000200
111 #define STATUS_FIFO_FULL 0x00000100
112 #define STATUS_MS_CED 0x00000080
113 #define STATUS_MS_ERR 0x00000040
114 #define STATUS_MS_BRQ 0x00000020
115 #define STATUS_MS_CNK 0x00000001
116
117 #define INT_STATUS_TPC_ERR 0x00080000
118 #define INT_STATUS_CRC_ERR 0x00040000
119 #define INT_STATUS_TIMER_TO 0x00020000
120 #define INT_STATUS_HSK_TO 0x00010000
121 #define INT_STATUS_ANY_ERR 0x00008000
122 #define INT_STATUS_FIFO_WRDY 0x00000080
123 #define INT_STATUS_FIFO_RRDY 0x00000040
124 #define INT_STATUS_MEDIA_OUT 0x00000010
125 #define INT_STATUS_MEDIA_IN 0x00000008
126 #define INT_STATUS_DMA_BOUNDARY 0x00000004
127 #define INT_STATUS_EOTRAN 0x00000002
128 #define INT_STATUS_EOTPC 0x00000001
129
130 #define INT_STATUS_ALL 0x000f801f
131
132 #define PAD_OUTPUT_ENABLE_MS 0x0F3F
133
134 #define PAD_PU_PD_OFF 0x7FFF0000
135 #define PAD_PU_PD_ON_MS_SOCK0 0x5f8f0000
136 #define PAD_PU_PD_ON_MS_SOCK1 0x0f0f0000
137
138 #define CLOCK_CONTROL_40MHZ 0x00000001
139 #define CLOCK_CONTROL_50MHZ 0x0000000a
140 #define CLOCK_CONTROL_60MHZ 0x00000008
141 #define CLOCK_CONTROL_62_5MHZ 0x0000000c
142 #define CLOCK_CONTROL_OFF 0x00000000
143
144 #define PCI_CTL_CLOCK_DLY_ADDR 0x000000b0
145 #define PCI_CTL_CLOCK_DLY_MASK_A 0x00000f00
146 #define PCI_CTL_CLOCK_DLY_MASK_B 0x0000f000
147
148 enum {
149 CMD_READY = 0x01,
150 FIFO_READY = 0x02,
151 REG_DATA = 0x04,
152 DMA_DATA = 0x08
153 };
154
155 static unsigned int jmb38x_ms_read_data(struct jmb38x_ms_host *host,
156 unsigned char *buf, unsigned int length)
157 {
158 unsigned int off = 0;
159
160 while (host->io_pos && length) {
161 buf[off++] = host->io_word[0] & 0xff;
162 host->io_word[0] >>= 8;
163 length--;
164 host->io_pos--;
165 }
166
167 if (!length)
168 return off;
169
170 while (!(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
171 if (length < 4)
172 break;
173 *(unsigned int *)(buf + off) = __raw_readl(host->addr + DATA);
174 length -= 4;
175 off += 4;
176 }
177
178 if (length
179 && !(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
180 host->io_word[0] = readl(host->addr + DATA);
181 for (host->io_pos = 4; host->io_pos; --host->io_pos) {
182 buf[off++] = host->io_word[0] & 0xff;
183 host->io_word[0] >>= 8;
184 length--;
185 if (!length)
186 break;
187 }
188 }
189
190 return off;
191 }
192
193 static unsigned int jmb38x_ms_read_reg_data(struct jmb38x_ms_host *host,
194 unsigned char *buf,
195 unsigned int length)
196 {
197 unsigned int off = 0;
198
199 while (host->io_pos > 4 && length) {
200 buf[off++] = host->io_word[0] & 0xff;
201 host->io_word[0] >>= 8;
202 length--;
203 host->io_pos--;
204 }
205
206 if (!length)
207 return off;
208
209 while (host->io_pos && length) {
210 buf[off++] = host->io_word[1] & 0xff;
211 host->io_word[1] >>= 8;
212 length--;
213 host->io_pos--;
214 }
215
216 return off;
217 }
218
219 static unsigned int jmb38x_ms_write_data(struct jmb38x_ms_host *host,
220 unsigned char *buf,
221 unsigned int length)
222 {
223 unsigned int off = 0;
224
225 if (host->io_pos) {
226 while (host->io_pos < 4 && length) {
227 host->io_word[0] |= buf[off++] << (host->io_pos * 8);
228 host->io_pos++;
229 length--;
230 }
231 }
232
233 if (host->io_pos == 4
234 && !(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
235 writel(host->io_word[0], host->addr + DATA);
236 host->io_pos = 0;
237 host->io_word[0] = 0;
238 } else if (host->io_pos) {
239 return off;
240 }
241
242 if (!length)
243 return off;
244
245 while (!(STATUS_FIFO_FULL & readl(host->addr + STATUS))) {
246 if (length < 4)
247 break;
248
249 __raw_writel(*(unsigned int *)(buf + off),
250 host->addr + DATA);
251 length -= 4;
252 off += 4;
253 }
254
255 switch (length) {
256 case 3:
257 host->io_word[0] |= buf[off + 2] << 16;
258 host->io_pos++;
259 case 2:
260 host->io_word[0] |= buf[off + 1] << 8;
261 host->io_pos++;
262 case 1:
263 host->io_word[0] |= buf[off];
264 host->io_pos++;
265 }
266
267 off += host->io_pos;
268
269 return off;
270 }
271
272 static unsigned int jmb38x_ms_write_reg_data(struct jmb38x_ms_host *host,
273 unsigned char *buf,
274 unsigned int length)
275 {
276 unsigned int off = 0;
277
278 while (host->io_pos < 4 && length) {
279 host->io_word[0] &= ~(0xff << (host->io_pos * 8));
280 host->io_word[0] |= buf[off++] << (host->io_pos * 8);
281 host->io_pos++;
282 length--;
283 }
284
285 if (!length)
286 return off;
287
288 while (host->io_pos < 8 && length) {
289 host->io_word[1] &= ~(0xff << (host->io_pos * 8));
290 host->io_word[1] |= buf[off++] << (host->io_pos * 8);
291 host->io_pos++;
292 length--;
293 }
294
295 return off;
296 }
297
298 static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host)
299 {
300 unsigned int length;
301 unsigned int off;
302 unsigned int t_size, p_cnt;
303 unsigned char *buf;
304 struct page *pg;
305 unsigned long flags = 0;
306
307 if (host->req->long_data) {
308 length = host->req->sg.length - host->block_pos;
309 off = host->req->sg.offset + host->block_pos;
310 } else {
311 length = host->req->data_len - host->block_pos;
312 off = 0;
313 }
314
315 while (length) {
316 unsigned int uninitialized_var(p_off);
317
318 if (host->req->long_data) {
319 pg = nth_page(sg_page(&host->req->sg),
320 off >> PAGE_SHIFT);
321 p_off = offset_in_page(off);
322 p_cnt = PAGE_SIZE - p_off;
323 p_cnt = min(p_cnt, length);
324
325 local_irq_save(flags);
326 buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + p_off;
327 } else {
328 buf = host->req->data + host->block_pos;
329 p_cnt = host->req->data_len - host->block_pos;
330 }
331
332 if (host->req->data_dir == WRITE)
333 t_size = !(host->cmd_flags & REG_DATA)
334 ? jmb38x_ms_write_data(host, buf, p_cnt)
335 : jmb38x_ms_write_reg_data(host, buf, p_cnt);
336 else
337 t_size = !(host->cmd_flags & REG_DATA)
338 ? jmb38x_ms_read_data(host, buf, p_cnt)
339 : jmb38x_ms_read_reg_data(host, buf, p_cnt);
340
341 if (host->req->long_data) {
342 kunmap_atomic(buf - p_off, KM_BIO_SRC_IRQ);
343 local_irq_restore(flags);
344 }
345
346 if (!t_size)
347 break;
348 host->block_pos += t_size;
349 length -= t_size;
350 off += t_size;
351 }
352
353 if (!length && host->req->data_dir == WRITE) {
354 if (host->cmd_flags & REG_DATA) {
355 writel(host->io_word[0], host->addr + TPC_P0);
356 writel(host->io_word[1], host->addr + TPC_P1);
357 } else if (host->io_pos) {
358 writel(host->io_word[0], host->addr + DATA);
359 }
360 }
361
362 return length;
363 }
364
365 static int jmb38x_ms_issue_cmd(struct memstick_host *msh)
366 {
367 struct jmb38x_ms_host *host = memstick_priv(msh);
368 unsigned char *data;
369 unsigned int data_len, cmd, t_val;
370
371 if (!(STATUS_HAS_MEDIA & readl(host->addr + STATUS))) {
372 dev_dbg(&msh->dev, "no media status\n");
373 host->req->error = -ETIME;
374 return host->req->error;
375 }
376
377 dev_dbg(&msh->dev, "control %08x\n", readl(host->addr + HOST_CONTROL));
378 dev_dbg(&msh->dev, "status %08x\n", readl(host->addr + INT_STATUS));
379 dev_dbg(&msh->dev, "hstatus %08x\n", readl(host->addr + STATUS));
380
381 host->cmd_flags = 0;
382 host->block_pos = 0;
383 host->io_pos = 0;
384 host->io_word[0] = 0;
385 host->io_word[1] = 0;
386
387 cmd = host->req->tpc << 16;
388 cmd |= TPC_DATA_SEL;
389
390 if (host->req->data_dir == READ)
391 cmd |= TPC_DIR;
392 if (host->req->need_card_int)
393 cmd |= TPC_WAIT_INT;
394
395 data = host->req->data;
396
397 if (!no_dma)
398 host->cmd_flags |= DMA_DATA;
399
400 if (host->req->long_data) {
401 data_len = host->req->sg.length;
402 } else {
403 data_len = host->req->data_len;
404 host->cmd_flags &= ~DMA_DATA;
405 }
406
407 if (data_len <= 8) {
408 cmd &= ~(TPC_DATA_SEL | 0xf);
409 host->cmd_flags |= REG_DATA;
410 cmd |= data_len & 0xf;
411 host->cmd_flags &= ~DMA_DATA;
412 }
413
414 if (host->cmd_flags & DMA_DATA) {
415 if (1 != pci_map_sg(host->chip->pdev, &host->req->sg, 1,
416 host->req->data_dir == READ
417 ? PCI_DMA_FROMDEVICE
418 : PCI_DMA_TODEVICE)) {
419 host->req->error = -ENOMEM;
420 return host->req->error;
421 }
422 data_len = sg_dma_len(&host->req->sg);
423 writel(sg_dma_address(&host->req->sg),
424 host->addr + DMA_ADDRESS);
425 writel(((1 << 16) & BLOCK_COUNT_MASK)
426 | (data_len & BLOCK_SIZE_MASK),
427 host->addr + BLOCK);
428 writel(DMA_CONTROL_ENABLE, host->addr + DMA_CONTROL);
429 } else if (!(host->cmd_flags & REG_DATA)) {
430 writel(((1 << 16) & BLOCK_COUNT_MASK)
431 | (data_len & BLOCK_SIZE_MASK),
432 host->addr + BLOCK);
433 t_val = readl(host->addr + INT_STATUS_ENABLE);
434 t_val |= host->req->data_dir == READ
435 ? INT_STATUS_FIFO_RRDY
436 : INT_STATUS_FIFO_WRDY;
437
438 writel(t_val, host->addr + INT_STATUS_ENABLE);
439 writel(t_val, host->addr + INT_SIGNAL_ENABLE);
440 } else {
441 cmd &= ~(TPC_DATA_SEL | 0xf);
442 host->cmd_flags |= REG_DATA;
443 cmd |= data_len & 0xf;
444
445 if (host->req->data_dir == WRITE) {
446 jmb38x_ms_transfer_data(host);
447 writel(host->io_word[0], host->addr + TPC_P0);
448 writel(host->io_word[1], host->addr + TPC_P1);
449 }
450 }
451
452 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
453 writel(HOST_CONTROL_LED | readl(host->addr + HOST_CONTROL),
454 host->addr + HOST_CONTROL);
455 host->req->error = 0;
456
457 writel(cmd, host->addr + TPC);
458 dev_dbg(&msh->dev, "executing TPC %08x, len %x\n", cmd, data_len);
459
460 return 0;
461 }
462
463 static void jmb38x_ms_complete_cmd(struct memstick_host *msh, int last)
464 {
465 struct jmb38x_ms_host *host = memstick_priv(msh);
466 unsigned int t_val = 0;
467 int rc;
468
469 del_timer(&host->timer);
470
471 dev_dbg(&msh->dev, "c control %08x\n",
472 readl(host->addr + HOST_CONTROL));
473 dev_dbg(&msh->dev, "c status %08x\n",
474 readl(host->addr + INT_STATUS));
475 dev_dbg(&msh->dev, "c hstatus %08x\n", readl(host->addr + STATUS));
476
477 host->req->int_reg = readl(host->addr + STATUS) & 0xff;
478
479 writel(0, host->addr + BLOCK);
480 writel(0, host->addr + DMA_CONTROL);
481
482 if (host->cmd_flags & DMA_DATA) {
483 pci_unmap_sg(host->chip->pdev, &host->req->sg, 1,
484 host->req->data_dir == READ
485 ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
486 } else {
487 t_val = readl(host->addr + INT_STATUS_ENABLE);
488 if (host->req->data_dir == READ)
489 t_val &= ~INT_STATUS_FIFO_RRDY;
490 else
491 t_val &= ~INT_STATUS_FIFO_WRDY;
492
493 writel(t_val, host->addr + INT_STATUS_ENABLE);
494 writel(t_val, host->addr + INT_SIGNAL_ENABLE);
495 }
496
497 writel((~HOST_CONTROL_LED) & readl(host->addr + HOST_CONTROL),
498 host->addr + HOST_CONTROL);
499
500 if (!last) {
501 do {
502 rc = memstick_next_req(msh, &host->req);
503 } while (!rc && jmb38x_ms_issue_cmd(msh));
504 } else {
505 do {
506 rc = memstick_next_req(msh, &host->req);
507 if (!rc)
508 host->req->error = -ETIME;
509 } while (!rc);
510 }
511 }
512
513 static irqreturn_t jmb38x_ms_isr(int irq, void *dev_id)
514 {
515 struct memstick_host *msh = dev_id;
516 struct jmb38x_ms_host *host = memstick_priv(msh);
517 unsigned int irq_status;
518
519 spin_lock(&host->lock);
520 irq_status = readl(host->addr + INT_STATUS);
521 dev_dbg(&host->chip->pdev->dev, "irq_status = %08x\n", irq_status);
522 if (irq_status == 0 || irq_status == (~0)) {
523 spin_unlock(&host->lock);
524 return IRQ_NONE;
525 }
526
527 if (host->req) {
528 if (irq_status & INT_STATUS_ANY_ERR) {
529 if (irq_status & INT_STATUS_CRC_ERR)
530 host->req->error = -EILSEQ;
531 else
532 host->req->error = -ETIME;
533 } else {
534 if (host->cmd_flags & DMA_DATA) {
535 if (irq_status & INT_STATUS_EOTRAN)
536 host->cmd_flags |= FIFO_READY;
537 } else {
538 if (irq_status & (INT_STATUS_FIFO_RRDY
539 | INT_STATUS_FIFO_WRDY))
540 jmb38x_ms_transfer_data(host);
541
542 if (irq_status & INT_STATUS_EOTRAN) {
543 jmb38x_ms_transfer_data(host);
544 host->cmd_flags |= FIFO_READY;
545 }
546 }
547
548 if (irq_status & INT_STATUS_EOTPC) {
549 host->cmd_flags |= CMD_READY;
550 if (host->cmd_flags & REG_DATA) {
551 if (host->req->data_dir == READ) {
552 host->io_word[0]
553 = readl(host->addr
554 + TPC_P0);
555 host->io_word[1]
556 = readl(host->addr
557 + TPC_P1);
558 host->io_pos = 8;
559
560 jmb38x_ms_transfer_data(host);
561 }
562 host->cmd_flags |= FIFO_READY;
563 }
564 }
565 }
566 }
567
568 if (irq_status & (INT_STATUS_MEDIA_IN | INT_STATUS_MEDIA_OUT)) {
569 dev_dbg(&host->chip->pdev->dev, "media changed\n");
570 memstick_detect_change(msh);
571 }
572
573 writel(irq_status, host->addr + INT_STATUS);
574
575 if (host->req
576 && (((host->cmd_flags & CMD_READY)
577 && (host->cmd_flags & FIFO_READY))
578 || host->req->error))
579 jmb38x_ms_complete_cmd(msh, 0);
580
581 spin_unlock(&host->lock);
582 return IRQ_HANDLED;
583 }
584
585 static void jmb38x_ms_abort(unsigned long data)
586 {
587 struct memstick_host *msh = (struct memstick_host *)data;
588 struct jmb38x_ms_host *host = memstick_priv(msh);
589 unsigned long flags;
590
591 dev_dbg(&host->chip->pdev->dev, "abort\n");
592 spin_lock_irqsave(&host->lock, flags);
593 if (host->req) {
594 host->req->error = -ETIME;
595 jmb38x_ms_complete_cmd(msh, 0);
596 }
597 spin_unlock_irqrestore(&host->lock, flags);
598 }
599
600 static void jmb38x_ms_req_tasklet(unsigned long data)
601 {
602 struct memstick_host *msh = (struct memstick_host *)data;
603 struct jmb38x_ms_host *host = memstick_priv(msh);
604 unsigned long flags;
605 int rc;
606
607 spin_lock_irqsave(&host->lock, flags);
608 if (!host->req) {
609 do {
610 rc = memstick_next_req(msh, &host->req);
611 dev_dbg(&host->chip->pdev->dev, "tasklet req %d\n", rc);
612 } while (!rc && jmb38x_ms_issue_cmd(msh));
613 }
614 spin_unlock_irqrestore(&host->lock, flags);
615 }
616
617 static void jmb38x_ms_dummy_submit(struct memstick_host *msh)
618 {
619 return;
620 }
621
622 static void jmb38x_ms_submit_req(struct memstick_host *msh)
623 {
624 struct jmb38x_ms_host *host = memstick_priv(msh);
625
626 tasklet_schedule(&host->notify);
627 }
628
629 static int jmb38x_ms_reset(struct jmb38x_ms_host *host)
630 {
631 int cnt;
632
633 writel(HOST_CONTROL_RESET_REQ | HOST_CONTROL_CLOCK_EN
634 | readl(host->addr + HOST_CONTROL),
635 host->addr + HOST_CONTROL);
636 mmiowb();
637
638 for (cnt = 0; cnt < 20; ++cnt) {
639 if (!(HOST_CONTROL_RESET_REQ
640 & readl(host->addr + HOST_CONTROL)))
641 goto reset_next;
642
643 ndelay(20);
644 }
645 dev_dbg(&host->chip->pdev->dev, "reset_req timeout\n");
646 /* return -EIO; */
647
648 reset_next:
649 writel(HOST_CONTROL_RESET | HOST_CONTROL_CLOCK_EN
650 | readl(host->addr + HOST_CONTROL),
651 host->addr + HOST_CONTROL);
652 mmiowb();
653
654 for (cnt = 0; cnt < 20; ++cnt) {
655 if (!(HOST_CONTROL_RESET
656 & readl(host->addr + HOST_CONTROL)))
657 goto reset_ok;
658
659 ndelay(20);
660 }
661 dev_dbg(&host->chip->pdev->dev, "reset timeout\n");
662 return -EIO;
663
664 reset_ok:
665 mmiowb();
666 writel(INT_STATUS_ALL, host->addr + INT_SIGNAL_ENABLE);
667 writel(INT_STATUS_ALL, host->addr + INT_STATUS_ENABLE);
668 return 0;
669 }
670
671 static int jmb38x_ms_set_param(struct memstick_host *msh,
672 enum memstick_param param,
673 int value)
674 {
675 struct jmb38x_ms_host *host = memstick_priv(msh);
676 unsigned int host_ctl = readl(host->addr + HOST_CONTROL);
677 unsigned int clock_ctl = CLOCK_CONTROL_40MHZ, clock_delay = 0;
678 int rc = 0;
679
680 switch (param) {
681 case MEMSTICK_POWER:
682 if (value == MEMSTICK_POWER_ON) {
683 rc = jmb38x_ms_reset(host);
684 if (rc)
685 return rc;
686
687 host_ctl = 7;
688 host_ctl |= HOST_CONTROL_POWER_EN
689 | HOST_CONTROL_CLOCK_EN
690 | HOST_CONTROL_HW_OC_P
691 | HOST_CONTROL_TDELAY_EN;
692 writel(host_ctl, host->addr + HOST_CONTROL);
693
694 writel(host->id ? PAD_PU_PD_ON_MS_SOCK1
695 : PAD_PU_PD_ON_MS_SOCK0,
696 host->addr + PAD_PU_PD);
697
698 writel(PAD_OUTPUT_ENABLE_MS,
699 host->addr + PAD_OUTPUT_ENABLE);
700
701 msleep(10);
702 dev_dbg(&host->chip->pdev->dev, "power on\n");
703 } else if (value == MEMSTICK_POWER_OFF) {
704 host_ctl &= ~(HOST_CONTROL_POWER_EN
705 | HOST_CONTROL_CLOCK_EN);
706 writel(host_ctl, host->addr + HOST_CONTROL);
707 writel(0, host->addr + PAD_OUTPUT_ENABLE);
708 writel(PAD_PU_PD_OFF, host->addr + PAD_PU_PD);
709 dev_dbg(&host->chip->pdev->dev, "power off\n");
710 } else
711 return -EINVAL;
712 break;
713 case MEMSTICK_INTERFACE:
714 host_ctl &= ~(3 << HOST_CONTROL_IF_SHIFT);
715 pci_read_config_dword(host->chip->pdev,
716 PCI_CTL_CLOCK_DLY_ADDR,
717 &clock_delay);
718 clock_delay &= host->id ? ~PCI_CTL_CLOCK_DLY_MASK_B
719 : ~PCI_CTL_CLOCK_DLY_MASK_A;
720
721 if (value == MEMSTICK_SERIAL) {
722 host_ctl &= ~HOST_CONTROL_FAST_CLK;
723 host_ctl &= ~HOST_CONTROL_REO;
724 host_ctl |= HOST_CONTROL_IF_SERIAL
725 << HOST_CONTROL_IF_SHIFT;
726 host_ctl |= HOST_CONTROL_REI;
727 clock_ctl = CLOCK_CONTROL_40MHZ;
728 } else if (value == MEMSTICK_PAR4) {
729 host_ctl |= HOST_CONTROL_FAST_CLK | HOST_CONTROL_REO;
730 host_ctl |= HOST_CONTROL_IF_PAR4
731 << HOST_CONTROL_IF_SHIFT;
732 host_ctl &= ~HOST_CONTROL_REI;
733 clock_ctl = CLOCK_CONTROL_40MHZ;
734 clock_delay |= host->id ? (4 << 12) : (4 << 8);
735 } else if (value == MEMSTICK_PAR8) {
736 host_ctl |= HOST_CONTROL_FAST_CLK;
737 host_ctl |= HOST_CONTROL_IF_PAR8
738 << HOST_CONTROL_IF_SHIFT;
739 host_ctl &= ~(HOST_CONTROL_REI | HOST_CONTROL_REO);
740 clock_ctl = CLOCK_CONTROL_50MHZ;
741 } else
742 return -EINVAL;
743
744 writel(host_ctl, host->addr + HOST_CONTROL);
745 writel(clock_ctl, host->addr + CLOCK_CONTROL);
746 pci_write_config_dword(host->chip->pdev,
747 PCI_CTL_CLOCK_DLY_ADDR,
748 clock_delay);
749 break;
750 };
751 return 0;
752 }
753
754 #ifdef CONFIG_PM
755
756 static int jmb38x_ms_suspend(struct pci_dev *dev, pm_message_t state)
757 {
758 struct jmb38x_ms *jm = pci_get_drvdata(dev);
759 int cnt;
760
761 for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
762 if (!jm->hosts[cnt])
763 break;
764 memstick_suspend_host(jm->hosts[cnt]);
765 }
766
767 pci_save_state(dev);
768 pci_enable_wake(dev, pci_choose_state(dev, state), 0);
769 pci_disable_device(dev);
770 pci_set_power_state(dev, pci_choose_state(dev, state));
771 return 0;
772 }
773
774 static int jmb38x_ms_resume(struct pci_dev *dev)
775 {
776 struct jmb38x_ms *jm = pci_get_drvdata(dev);
777 int rc;
778
779 pci_set_power_state(dev, PCI_D0);
780 pci_restore_state(dev);
781 rc = pci_enable_device(dev);
782 if (rc)
783 return rc;
784 pci_set_master(dev);
785
786 pci_read_config_dword(dev, 0xac, &rc);
787 pci_write_config_dword(dev, 0xac, rc | 0x00470000);
788
789 for (rc = 0; rc < jm->host_cnt; ++rc) {
790 if (!jm->hosts[rc])
791 break;
792 memstick_resume_host(jm->hosts[rc]);
793 memstick_detect_change(jm->hosts[rc]);
794 }
795
796 return 0;
797 }
798
799 #else
800
801 #define jmb38x_ms_suspend NULL
802 #define jmb38x_ms_resume NULL
803
804 #endif /* CONFIG_PM */
805
806 static int jmb38x_ms_count_slots(struct pci_dev *pdev)
807 {
808 int cnt, rc = 0;
809
810 for (cnt = 0; cnt < PCI_ROM_RESOURCE; ++cnt) {
811 if (!(IORESOURCE_MEM & pci_resource_flags(pdev, cnt)))
812 break;
813
814 if (256 != pci_resource_len(pdev, cnt))
815 break;
816
817 ++rc;
818 }
819 return rc;
820 }
821
822 static struct memstick_host *jmb38x_ms_alloc_host(struct jmb38x_ms *jm, int cnt)
823 {
824 struct memstick_host *msh;
825 struct jmb38x_ms_host *host;
826
827 msh = memstick_alloc_host(sizeof(struct jmb38x_ms_host),
828 &jm->pdev->dev);
829 if (!msh)
830 return NULL;
831
832 host = memstick_priv(msh);
833 host->chip = jm;
834 host->addr = ioremap(pci_resource_start(jm->pdev, cnt),
835 pci_resource_len(jm->pdev, cnt));
836 if (!host->addr)
837 goto err_out_free;
838
839 spin_lock_init(&host->lock);
840 host->id = cnt;
841 snprintf(host->host_id, sizeof(host->host_id), DRIVER_NAME ":slot%d",
842 host->id);
843 host->irq = jm->pdev->irq;
844 host->timeout_jiffies = msecs_to_jiffies(1000);
845
846 tasklet_init(&host->notify, jmb38x_ms_req_tasklet, (unsigned long)msh);
847 msh->request = jmb38x_ms_submit_req;
848 msh->set_param = jmb38x_ms_set_param;
849
850 msh->caps = MEMSTICK_CAP_PAR4 | MEMSTICK_CAP_PAR8;
851
852 setup_timer(&host->timer, jmb38x_ms_abort, (unsigned long)msh);
853
854 if (!request_irq(host->irq, jmb38x_ms_isr, IRQF_SHARED, host->host_id,
855 msh))
856 return msh;
857
858 iounmap(host->addr);
859 err_out_free:
860 kfree(msh);
861 return NULL;
862 }
863
864 static void jmb38x_ms_free_host(struct memstick_host *msh)
865 {
866 struct jmb38x_ms_host *host = memstick_priv(msh);
867
868 free_irq(host->irq, msh);
869 iounmap(host->addr);
870 memstick_free_host(msh);
871 }
872
873 static int jmb38x_ms_probe(struct pci_dev *pdev,
874 const struct pci_device_id *dev_id)
875 {
876 struct jmb38x_ms *jm;
877 int pci_dev_busy = 0;
878 int rc, cnt;
879
880 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
881 if (rc)
882 return rc;
883
884 rc = pci_enable_device(pdev);
885 if (rc)
886 return rc;
887
888 pci_set_master(pdev);
889
890 rc = pci_request_regions(pdev, DRIVER_NAME);
891 if (rc) {
892 pci_dev_busy = 1;
893 goto err_out;
894 }
895
896 pci_read_config_dword(pdev, 0xac, &rc);
897 pci_write_config_dword(pdev, 0xac, rc | 0x00470000);
898
899 cnt = jmb38x_ms_count_slots(pdev);
900 if (!cnt) {
901 rc = -ENODEV;
902 pci_dev_busy = 1;
903 goto err_out;
904 }
905
906 jm = kzalloc(sizeof(struct jmb38x_ms)
907 + cnt * sizeof(struct memstick_host *), GFP_KERNEL);
908 if (!jm) {
909 rc = -ENOMEM;
910 goto err_out_int;
911 }
912
913 jm->pdev = pdev;
914 jm->host_cnt = cnt;
915 pci_set_drvdata(pdev, jm);
916
917 for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
918 jm->hosts[cnt] = jmb38x_ms_alloc_host(jm, cnt);
919 if (!jm->hosts[cnt])
920 break;
921
922 rc = memstick_add_host(jm->hosts[cnt]);
923
924 if (rc) {
925 jmb38x_ms_free_host(jm->hosts[cnt]);
926 jm->hosts[cnt] = NULL;
927 break;
928 }
929 }
930
931 if (cnt)
932 return 0;
933
934 rc = -ENODEV;
935
936 pci_set_drvdata(pdev, NULL);
937 kfree(jm);
938 err_out_int:
939 pci_release_regions(pdev);
940 err_out:
941 if (!pci_dev_busy)
942 pci_disable_device(pdev);
943 return rc;
944 }
945
946 static void jmb38x_ms_remove(struct pci_dev *dev)
947 {
948 struct jmb38x_ms *jm = pci_get_drvdata(dev);
949 struct jmb38x_ms_host *host;
950 int cnt;
951 unsigned long flags;
952
953 for (cnt = 0; cnt < jm->host_cnt; ++cnt) {
954 if (!jm->hosts[cnt])
955 break;
956
957 host = memstick_priv(jm->hosts[cnt]);
958
959 jm->hosts[cnt]->request = jmb38x_ms_dummy_submit;
960 tasklet_kill(&host->notify);
961 writel(0, host->addr + INT_SIGNAL_ENABLE);
962 writel(0, host->addr + INT_STATUS_ENABLE);
963 mmiowb();
964 dev_dbg(&jm->pdev->dev, "interrupts off\n");
965 spin_lock_irqsave(&host->lock, flags);
966 if (host->req) {
967 host->req->error = -ETIME;
968 jmb38x_ms_complete_cmd(jm->hosts[cnt], 1);
969 }
970 spin_unlock_irqrestore(&host->lock, flags);
971
972 memstick_remove_host(jm->hosts[cnt]);
973 dev_dbg(&jm->pdev->dev, "host removed\n");
974
975 jmb38x_ms_free_host(jm->hosts[cnt]);
976 }
977
978 pci_set_drvdata(dev, NULL);
979 pci_release_regions(dev);
980 pci_disable_device(dev);
981 kfree(jm);
982 }
983
984 static struct pci_device_id jmb38x_ms_id_tbl [] = {
985 { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB38X_MS, PCI_ANY_ID,
986 PCI_ANY_ID, 0, 0, 0 },
987 { }
988 };
989
990 static struct pci_driver jmb38x_ms_driver = {
991 .name = DRIVER_NAME,
992 .id_table = jmb38x_ms_id_tbl,
993 .probe = jmb38x_ms_probe,
994 .remove = jmb38x_ms_remove,
995 .suspend = jmb38x_ms_suspend,
996 .resume = jmb38x_ms_resume
997 };
998
999 static int __init jmb38x_ms_init(void)
1000 {
1001 return pci_register_driver(&jmb38x_ms_driver);
1002 }
1003
1004 static void __exit jmb38x_ms_exit(void)
1005 {
1006 pci_unregister_driver(&jmb38x_ms_driver);
1007 }
1008
1009 MODULE_AUTHOR("Alex Dubov");
1010 MODULE_DESCRIPTION("JMicron jmb38x MemoryStick driver");
1011 MODULE_LICENSE("GPL");
1012 MODULE_DEVICE_TABLE(pci, jmb38x_ms_id_tbl);
1013
1014 module_init(jmb38x_ms_init);
1015 module_exit(jmb38x_ms_exit);
Support for the Chinese Samsung S3C2440 based development boards