1 /*
2 * linux/drivers/mmc/host/wbsd.c - Winbond W83L51xD SD/MMC driver
3 *
4 * Copyright (C) 2004-2007 Pierre Ossman, All Rights Reserved.
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 as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 *
11 *
12 * Warning!
13 *
14 * Changes to the FIFO system should be done with extreme care since
15 * the hardware is full of bugs related to the FIFO. Known issues are:
16 *
17 * - FIFO size field in FSR is always zero.
18 *
19 * - FIFO interrupts tend not to work as they should. Interrupts are
20 * triggered only for full/empty events, not for threshold values.
21 *
22 * - On APIC systems the FIFO empty interrupt is sometimes lost.
23 */
24
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
29 #include <linux/platform_device.h>
30 #include <linux/interrupt.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/delay.h>
33 #include <linux/pnp.h>
34 #include <linux/highmem.h>
35 #include <linux/mmc/host.h>
36 #include <linux/scatterlist.h>
37
38 #include <asm/io.h>
39 #include <asm/dma.h>
40
41 #include "wbsd.h"
42
43 #define DRIVER_NAME "wbsd"
44
45 #define DBG(x...) \
46 pr_debug(DRIVER_NAME ": " x)
47 #define DBGF(f, x...) \
48 pr_debug(DRIVER_NAME " [%s()]: " f, __func__ , ##x)
49
50 /*
51 * Device resources
52 */
53
54 #ifdef CONFIG_PNP
55
56 static const struct pnp_device_id pnp_dev_table[] = {
57 { "WEC0517", 0 },
58 { "WEC0518", 0 },
59 { "", 0 },
60 };
61
62 MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
63
64 #endif /* CONFIG_PNP */
65
66 static const int config_ports[] = { 0x2E, 0x4E };
67 static const int unlock_codes[] = { 0x83, 0x87 };
68
69 static const int valid_ids[] = {
70 0x7112,
71 };
72
73 #ifdef CONFIG_PNP
74 static unsigned int param_nopnp = 0;
75 #else
76 static const unsigned int param_nopnp = 1;
77 #endif
78 static unsigned int param_io = 0x248;
79 static unsigned int param_irq = 6;
80 static int param_dma = 2;
81
82 /*
83 * Basic functions
84 */
85
86 static inline void wbsd_unlock_config(struct wbsd_host *host)
87 {
88 BUG_ON(host->config == 0);
89
90 outb(host->unlock_code, host->config);
91 outb(host->unlock_code, host->config);
92 }
93
94 static inline void wbsd_lock_config(struct wbsd_host *host)
95 {
96 BUG_ON(host->config == 0);
97
98 outb(LOCK_CODE, host->config);
99 }
100
101 static inline void wbsd_write_config(struct wbsd_host *host, u8 reg, u8 value)
102 {
103 BUG_ON(host->config == 0);
104
105 outb(reg, host->config);
106 outb(value, host->config + 1);
107 }
108
109 static inline u8 wbsd_read_config(struct wbsd_host *host, u8 reg)
110 {
111 BUG_ON(host->config == 0);
112
113 outb(reg, host->config);
114 return inb(host->config + 1);
115 }
116
117 static inline void wbsd_write_index(struct wbsd_host *host, u8 index, u8 value)
118 {
119 outb(index, host->base + WBSD_IDXR);
120 outb(value, host->base + WBSD_DATAR);
121 }
122
123 static inline u8 wbsd_read_index(struct wbsd_host *host, u8 index)
124 {
125 outb(index, host->base + WBSD_IDXR);
126 return inb(host->base + WBSD_DATAR);
127 }
128
129 /*
130 * Common routines
131 */
132
133 static void wbsd_init_device(struct wbsd_host *host)
134 {
135 u8 setup, ier;
136
137 /*
138 * Reset chip (SD/MMC part) and fifo.
139 */
140 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
141 setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET;
142 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
143
144 /*
145 * Set DAT3 to input
146 */
147 setup &= ~WBSD_DAT3_H;
148 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
149 host->flags &= ~WBSD_FIGNORE_DETECT;
150
151 /*
152 * Read back default clock.
153 */
154 host->clk = wbsd_read_index(host, WBSD_IDX_CLK);
155
156 /*
157 * Power down port.
158 */
159 outb(WBSD_POWER_N, host->base + WBSD_CSR);
160
161 /*
162 * Set maximum timeout.
163 */
164 wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F);
165
166 /*
167 * Test for card presence
168 */
169 if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT)
170 host->flags |= WBSD_FCARD_PRESENT;
171 else
172 host->flags &= ~WBSD_FCARD_PRESENT;
173
174 /*
175 * Enable interesting interrupts.
176 */
177 ier = 0;
178 ier |= WBSD_EINT_CARD;
179 ier |= WBSD_EINT_FIFO_THRE;
180 ier |= WBSD_EINT_CRC;
181 ier |= WBSD_EINT_TIMEOUT;
182 ier |= WBSD_EINT_TC;
183
184 outb(ier, host->base + WBSD_EIR);
185
186 /*
187 * Clear interrupts.
188 */
189 inb(host->base + WBSD_ISR);
190 }
191
192 static void wbsd_reset(struct wbsd_host *host)
193 {
194 u8 setup;
195
196 printk(KERN_ERR "%s: Resetting chip\n", mmc_hostname(host->mmc));
197
198 /*
199 * Soft reset of chip (SD/MMC part).
200 */
201 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
202 setup |= WBSD_SOFT_RESET;
203 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
204 }
205
206 static void wbsd_request_end(struct wbsd_host *host, struct mmc_request *mrq)
207 {
208 unsigned long dmaflags;
209
210 if (host->dma >= 0) {
211 /*
212 * Release ISA DMA controller.
213 */
214 dmaflags = claim_dma_lock();
215 disable_dma(host->dma);
216 clear_dma_ff(host->dma);
217 release_dma_lock(dmaflags);
218
219 /*
220 * Disable DMA on host.
221 */
222 wbsd_write_index(host, WBSD_IDX_DMA, 0);
223 }
224
225 host->mrq = NULL;
226
227 /*
228 * MMC layer might call back into the driver so first unlock.
229 */
230 spin_unlock(&host->lock);
231 mmc_request_done(host->mmc, mrq);
232 spin_lock(&host->lock);
233 }
234
235 /*
236 * Scatter/gather functions
237 */
238
239 static inline void wbsd_init_sg(struct wbsd_host *host, struct mmc_data *data)
240 {
241 /*
242 * Get info. about SG list from data structure.
243 */
244 host->cur_sg = data->sg;
245 host->num_sg = data->sg_len;
246
247 host->offset = 0;
248 host->remain = host->cur_sg->length;
249 }
250
251 static inline int wbsd_next_sg(struct wbsd_host *host)
252 {
253 /*
254 * Skip to next SG entry.
255 */
256 host->cur_sg++;
257 host->num_sg--;
258
259 /*
260 * Any entries left?
261 */
262 if (host->num_sg > 0) {
263 host->offset = 0;
264 host->remain = host->cur_sg->length;
265 }
266
267 return host->num_sg;
268 }
269
270 static inline char *wbsd_sg_to_buffer(struct wbsd_host *host)
271 {
272 return sg_virt(host->cur_sg);
273 }
274
275 static inline void wbsd_sg_to_dma(struct wbsd_host *host, struct mmc_data *data)
276 {
277 unsigned int len, i;
278 struct scatterlist *sg;
279 char *dmabuf = host->dma_buffer;
280 char *sgbuf;
281
282 sg = data->sg;
283 len = data->sg_len;
284
285 for (i = 0; i < len; i++) {
286 sgbuf = sg_virt(&sg[i]);
287 memcpy(dmabuf, sgbuf, sg[i].length);
288 dmabuf += sg[i].length;
289 }
290 }
291
292 static inline void wbsd_dma_to_sg(struct wbsd_host *host, struct mmc_data *data)
293 {
294 unsigned int len, i;
295 struct scatterlist *sg;
296 char *dmabuf = host->dma_buffer;
297 char *sgbuf;
298
299 sg = data->sg;
300 len = data->sg_len;
301
302 for (i = 0; i < len; i++) {
303 sgbuf = sg_virt(&sg[i]);
304 memcpy(sgbuf, dmabuf, sg[i].length);
305 dmabuf += sg[i].length;
306 }
307 }
308
309 /*
310 * Command handling
311 */
312
313 static inline void wbsd_get_short_reply(struct wbsd_host *host,
314 struct mmc_command *cmd)
315 {
316 /*
317 * Correct response type?
318 */
319 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) {
320 cmd->error = -EILSEQ;
321 return;
322 }
323
324 cmd->resp[0] = wbsd_read_index(host, WBSD_IDX_RESP12) << 24;
325 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP13) << 16;
326 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP14) << 8;
327 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP15) << 0;
328 cmd->resp[1] = wbsd_read_index(host, WBSD_IDX_RESP16) << 24;
329 }
330
331 static inline void wbsd_get_long_reply(struct wbsd_host *host,
332 struct mmc_command *cmd)
333 {
334 int i;
335
336 /*
337 * Correct response type?
338 */
339 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) {
340 cmd->error = -EILSEQ;
341 return;
342 }
343
344 for (i = 0; i < 4; i++) {
345 cmd->resp[i] =
346 wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24;
347 cmd->resp[i] |=
348 wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16;
349 cmd->resp[i] |=
350 wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8;
351 cmd->resp[i] |=
352 wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0;
353 }
354 }
355
356 static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd)
357 {
358 int i;
359 u8 status, isr;
360
361 /*
362 * Clear accumulated ISR. The interrupt routine
363 * will fill this one with events that occur during
364 * transfer.
365 */
366 host->isr = 0;
367
368 /*
369 * Send the command (CRC calculated by host).
370 */
371 outb(cmd->opcode, host->base + WBSD_CMDR);
372 for (i = 3; i >= 0; i--)
373 outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR);
374
375 cmd->error = 0;
376
377 /*
378 * Wait for the request to complete.
379 */
380 do {
381 status = wbsd_read_index(host, WBSD_IDX_STATUS);
382 } while (status & WBSD_CARDTRAFFIC);
383
384 /*
385 * Do we expect a reply?
386 */
387 if (cmd->flags & MMC_RSP_PRESENT) {
388 /*
389 * Read back status.
390 */
391 isr = host->isr;
392
393 /* Card removed? */
394 if (isr & WBSD_INT_CARD)
395 cmd->error = -ENOMEDIUM;
396 /* Timeout? */
397 else if (isr & WBSD_INT_TIMEOUT)
398 cmd->error = -ETIMEDOUT;
399 /* CRC? */
400 else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC))
401 cmd->error = -EILSEQ;
402 /* All ok */
403 else {
404 if (cmd->flags & MMC_RSP_136)
405 wbsd_get_long_reply(host, cmd);
406 else
407 wbsd_get_short_reply(host, cmd);
408 }
409 }
410 }
411
412 /*
413 * Data functions
414 */
415
416 static void wbsd_empty_fifo(struct wbsd_host *host)
417 {
418 struct mmc_data *data = host->mrq->cmd->data;
419 char *buffer;
420 int i, fsr, fifo;
421
422 /*
423 * Handle excessive data.
424 */
425 if (host->num_sg == 0)
426 return;
427
428 buffer = wbsd_sg_to_buffer(host) + host->offset;
429
430 /*
431 * Drain the fifo. This has a tendency to loop longer
432 * than the FIFO length (usually one block).
433 */
434 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) {
435 /*
436 * The size field in the FSR is broken so we have to
437 * do some guessing.
438 */
439 if (fsr & WBSD_FIFO_FULL)
440 fifo = 16;
441 else if (fsr & WBSD_FIFO_FUTHRE)
442 fifo = 8;
443 else
444 fifo = 1;
445
446 for (i = 0; i < fifo; i++) {
447 *buffer = inb(host->base + WBSD_DFR);
448 buffer++;
449 host->offset++;
450 host->remain--;
451
452 data->bytes_xfered++;
453
454 /*
455 * End of scatter list entry?
456 */
457 if (host->remain == 0) {
458 /*
459 * Get next entry. Check if last.
460 */
461 if (!wbsd_next_sg(host))
462 return;
463
464 buffer = wbsd_sg_to_buffer(host);
465 }
466 }
467 }
468
469 /*
470 * This is a very dirty hack to solve a
471 * hardware problem. The chip doesn't trigger
472 * FIFO threshold interrupts properly.
473 */
474 if ((data->blocks * data->blksz - data->bytes_xfered) < 16)
475 tasklet_schedule(&host->fifo_tasklet);
476 }
477
478 static void wbsd_fill_fifo(struct wbsd_host *host)
479 {
480 struct mmc_data *data = host->mrq->cmd->data;
481 char *buffer;
482 int i, fsr, fifo;
483
484 /*
485 * Check that we aren't being called after the
486 * entire buffer has been transfered.
487 */
488 if (host->num_sg == 0)
489 return;
490
491 buffer = wbsd_sg_to_buffer(host) + host->offset;
492
493 /*
494 * Fill the fifo. This has a tendency to loop longer
495 * than the FIFO length (usually one block).
496 */
497 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) {
498 /*
499 * The size field in the FSR is broken so we have to
500 * do some guessing.
501 */
502 if (fsr & WBSD_FIFO_EMPTY)
503 fifo = 0;
504 else if (fsr & WBSD_FIFO_EMTHRE)
505 fifo = 8;
506 else
507 fifo = 15;
508
509 for (i = 16; i > fifo; i--) {
510 outb(*buffer, host->base + WBSD_DFR);
511 buffer++;
512 host->offset++;
513 host->remain--;
514
515 data->bytes_xfered++;
516
517 /*
518 * End of scatter list entry?
519 */
520 if (host->remain == 0) {
521 /*
522 * Get next entry. Check if last.
523 */
524 if (!wbsd_next_sg(host))
525 return;
526
527 buffer = wbsd_sg_to_buffer(host);
528 }
529 }
530 }
531
532 /*
533 * The controller stops sending interrupts for
534 * 'FIFO empty' under certain conditions. So we
535 * need to be a bit more pro-active.
536 */
537 tasklet_schedule(&host->fifo_tasklet);
538 }
539
540 static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data)
541 {
542 u16 blksize;
543 u8 setup;
544 unsigned long dmaflags;
545 unsigned int size;
546
547 /*
548 * Calculate size.
549 */
550 size = data->blocks * data->blksz;
551
552 /*
553 * Check timeout values for overflow.
554 * (Yes, some cards cause this value to overflow).
555 */
556 if (data->timeout_ns > 127000000)
557 wbsd_write_index(host, WBSD_IDX_TAAC, 127);
558 else {
559 wbsd_write_index(host, WBSD_IDX_TAAC,
560 data->timeout_ns / 1000000);
561 }
562
563 if (data->timeout_clks > 255)
564 wbsd_write_index(host, WBSD_IDX_NSAC, 255);
565 else
566 wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks);
567
568 /*
569 * Inform the chip of how large blocks will be
570 * sent. It needs this to determine when to
571 * calculate CRC.
572 *
573 * Space for CRC must be included in the size.
574 * Two bytes are needed for each data line.
575 */
576 if (host->bus_width == MMC_BUS_WIDTH_1) {
577 blksize = data->blksz + 2;
578
579 wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0);
580 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
581 } else if (host->bus_width == MMC_BUS_WIDTH_4) {
582 blksize = data->blksz + 2 * 4;
583
584 wbsd_write_index(host, WBSD_IDX_PBSMSB,
585 ((blksize >> 4) & 0xF0) | WBSD_DATA_WIDTH);
586 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
587 } else {
588 data->error = -EINVAL;
589 return;
590 }
591
592 /*
593 * Clear the FIFO. This is needed even for DMA
594 * transfers since the chip still uses the FIFO
595 * internally.
596 */
597 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
598 setup |= WBSD_FIFO_RESET;
599 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
600
601 /*
602 * DMA transfer?
603 */
604 if (host->dma >= 0) {
605 /*
606 * The buffer for DMA is only 64 kB.
607 */
608 BUG_ON(size > 0x10000);
609 if (size > 0x10000) {
610 data->error = -EINVAL;
611 return;
612 }
613
614 /*
615 * Transfer data from the SG list to
616 * the DMA buffer.
617 */
618 if (data->flags & MMC_DATA_WRITE)
619 wbsd_sg_to_dma(host, data);
620
621 /*
622 * Initialise the ISA DMA controller.
623 */
624 dmaflags = claim_dma_lock();
625 disable_dma(host->dma);
626 clear_dma_ff(host->dma);
627 if (data->flags & MMC_DATA_READ)
628 set_dma_mode(host->dma, DMA_MODE_READ & ~0x40);
629 else
630 set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40);
631 set_dma_addr(host->dma, host->dma_addr);
632 set_dma_count(host->dma, size);
633
634 enable_dma(host->dma);
635 release_dma_lock(dmaflags);
636
637 /*
638 * Enable DMA on the host.
639 */
640 wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE);
641 } else {
642 /*
643 * This flag is used to keep printk
644 * output to a minimum.
645 */
646 host->firsterr = 1;
647
648 /*
649 * Initialise the SG list.
650 */
651 wbsd_init_sg(host, data);
652
653 /*
654 * Turn off DMA.
655 */
656 wbsd_write_index(host, WBSD_IDX_DMA, 0);
657
658 /*
659 * Set up FIFO threshold levels (and fill
660 * buffer if doing a write).
661 */
662 if (data->flags & MMC_DATA_READ) {
663 wbsd_write_index(host, WBSD_IDX_FIFOEN,
664 WBSD_FIFOEN_FULL | 8);
665 } else {
666 wbsd_write_index(host, WBSD_IDX_FIFOEN,
667 WBSD_FIFOEN_EMPTY | 8);
668 wbsd_fill_fifo(host);
669 }
670 }
671
672 data->error = 0;
673 }
674
675 static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data)
676 {
677 unsigned long dmaflags;
678 int count;
679 u8 status;
680
681 WARN_ON(host->mrq == NULL);
682
683 /*
684 * Send a stop command if needed.
685 */
686 if (data->stop)
687 wbsd_send_command(host, data->stop);
688
689 /*
690 * Wait for the controller to leave data
691 * transfer state.
692 */
693 do {
694 status = wbsd_read_index(host, WBSD_IDX_STATUS);
695 } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE));
696
697 /*
698 * DMA transfer?
699 */
700 if (host->dma >= 0) {
701 /*
702 * Disable DMA on the host.
703 */
704 wbsd_write_index(host, WBSD_IDX_DMA, 0);
705
706 /*
707 * Turn of ISA DMA controller.
708 */
709 dmaflags = claim_dma_lock();
710 disable_dma(host->dma);
711 clear_dma_ff(host->dma);
712 count = get_dma_residue(host->dma);
713 release_dma_lock(dmaflags);
714
715 data->bytes_xfered = host->mrq->data->blocks *
716 host->mrq->data->blksz - count;
717 data->bytes_xfered -= data->bytes_xfered % data->blksz;
718
719 /*
720 * Any leftover data?
721 */
722 if (count) {
723 printk(KERN_ERR "%s: Incomplete DMA transfer. "
724 "%d bytes left.\n",
725 mmc_hostname(host->mmc), count);
726
727 if (!data->error)
728 data->error = -EIO;
729 } else {
730 /*
731 * Transfer data from DMA buffer to
732 * SG list.
733 */
734 if (data->flags & MMC_DATA_READ)
735 wbsd_dma_to_sg(host, data);
736 }
737
738 if (data->error) {
739 if (data->bytes_xfered)
740 data->bytes_xfered -= data->blksz;
741 }
742 }
743
744 wbsd_request_end(host, host->mrq);
745 }
746
747 /*****************************************************************************\
748 * *
749 * MMC layer callbacks *
750 * *
751 \*****************************************************************************/
752
753 static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
754 {
755 struct wbsd_host *host = mmc_priv(mmc);
756 struct mmc_command *cmd;
757
758 /*
759 * Disable tasklets to avoid a deadlock.
760 */
761 spin_lock_bh(&host->lock);
762
763 BUG_ON(host->mrq != NULL);
764
765 cmd = mrq->cmd;
766
767 host->mrq = mrq;
768
769 /*
770 * Check that there is actually a card in the slot.
771 */
772 if (!(host->flags & WBSD_FCARD_PRESENT)) {
773 cmd->error = -ENOMEDIUM;
774 goto done;
775 }
776
777 if (cmd->data) {
778 /*
779 * The hardware is so delightfully stupid that it has a list
780 * of "data" commands. If a command isn't on this list, it'll
781 * just go back to the idle state and won't send any data
782 * interrupts.
783 */
784 switch (cmd->opcode) {
785 case 11:
786 case 17:
787 case 18:
788 case 20:
789 case 24:
790 case 25:
791 case 26:
792 case 27:
793 case 30:
794 case 42:
795 case 56:
796 break;
797
798 /* ACMDs. We don't keep track of state, so we just treat them
799 * like any other command. */
800 case 51:
801 break;
802
803 default:
804 #ifdef CONFIG_MMC_DEBUG
805 printk(KERN_WARNING "%s: Data command %d is not "
806 "supported by this controller.\n",
807 mmc_hostname(host->mmc), cmd->opcode);
808 #endif
809 cmd->error = -EINVAL;
810
811 goto done;
812 };
813 }
814
815 /*
816 * Does the request include data?
817 */
818 if (cmd->data) {
819 wbsd_prepare_data(host, cmd->data);
820
821 if (cmd->data->error)
822 goto done;
823 }
824
825 wbsd_send_command(host, cmd);
826
827 /*
828 * If this is a data transfer the request
829 * will be finished after the data has
830 * transfered.
831 */
832 if (cmd->data && !cmd->error) {
833 /*
834 * Dirty fix for hardware bug.
835 */
836 if (host->dma == -1)
837 tasklet_schedule(&host->fifo_tasklet);
838
839 spin_unlock_bh(&host->lock);
840
841 return;
842 }
843
844 done:
845 wbsd_request_end(host, mrq);
846
847 spin_unlock_bh(&host->lock);
848 }
849
850 static void wbsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
851 {
852 struct wbsd_host *host = mmc_priv(mmc);
853 u8 clk, setup, pwr;
854
855 spin_lock_bh(&host->lock);
856
857 /*
858 * Reset the chip on each power off.
859 * Should clear out any weird states.
860 */
861 if (ios->power_mode == MMC_POWER_OFF)
862 wbsd_init_device(host);
863
864 if (ios->clock >= 24000000)
865 clk = WBSD_CLK_24M;
866 else if (ios->clock >= 16000000)
867 clk = WBSD_CLK_16M;
868 else if (ios->clock >= 12000000)
869 clk = WBSD_CLK_12M;
870 else
871 clk = WBSD_CLK_375K;
872
873 /*
874 * Only write to the clock register when
875 * there is an actual change.
876 */
877 if (clk != host->clk) {
878 wbsd_write_index(host, WBSD_IDX_CLK, clk);
879 host->clk = clk;
880 }
881
882 /*
883 * Power up card.
884 */
885 if (ios->power_mode != MMC_POWER_OFF) {
886 pwr = inb(host->base + WBSD_CSR);
887 pwr &= ~WBSD_POWER_N;
888 outb(pwr, host->base + WBSD_CSR);
889 }
890
891 /*
892 * MMC cards need to have pin 1 high during init.
893 * It wreaks havoc with the card detection though so
894 * that needs to be disabled.
895 */
896 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
897 if (ios->chip_select == MMC_CS_HIGH) {
898 BUG_ON(ios->bus_width != MMC_BUS_WIDTH_1);
899 setup |= WBSD_DAT3_H;
900 host->flags |= WBSD_FIGNORE_DETECT;
901 } else {
902 if (setup & WBSD_DAT3_H) {
903 setup &= ~WBSD_DAT3_H;
904
905 /*
906 * We cannot resume card detection immediatly
907 * because of capacitance and delays in the chip.
908 */
909 mod_timer(&host->ignore_timer, jiffies + HZ / 100);
910 }
911 }
912 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
913
914 /*
915 * Store bus width for later. Will be used when
916 * setting up the data transfer.
917 */
918 host->bus_width = ios->bus_width;
919
920 spin_unlock_bh(&host->lock);
921 }
922
923 static int wbsd_get_ro(struct mmc_host *mmc)
924 {
925 struct wbsd_host *host = mmc_priv(mmc);
926 u8 csr;
927
928 spin_lock_bh(&host->lock);
929
930 csr = inb(host->base + WBSD_CSR);
931 csr |= WBSD_MSLED;
932 outb(csr, host->base + WBSD_CSR);
933
934 mdelay(1);
935
936 csr = inb(host->base + WBSD_CSR);
937 csr &= ~WBSD_MSLED;
938 outb(csr, host->base + WBSD_CSR);
939
940 spin_unlock_bh(&host->lock);
941
942 return !!(csr & WBSD_WRPT);
943 }
944
945 static const struct mmc_host_ops wbsd_ops = {
946 .request = wbsd_request,
947 .set_ios = wbsd_set_ios,
948 .get_ro = wbsd_get_ro,
949 };
950
951 /*****************************************************************************\
952 * *
953 * Interrupt handling *
954 * *
955 \*****************************************************************************/
956
957 /*
958 * Helper function to reset detection ignore
959 */
960
961 static void wbsd_reset_ignore(unsigned long data)
962 {
963 struct wbsd_host *host = (struct wbsd_host *)data;
964
965 BUG_ON(host == NULL);
966
967 DBG("Resetting card detection ignore\n");
968
969 spin_lock_bh(&host->lock);
970
971 host->flags &= ~WBSD_FIGNORE_DETECT;
972
973 /*
974 * Card status might have changed during the
975 * blackout.
976 */
977 tasklet_schedule(&host->card_tasklet);
978
979 spin_unlock_bh(&host->lock);
980 }
981
982 /*
983 * Tasklets
984 */
985
986 static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host)
987 {
988 WARN_ON(!host->mrq);
989 if (!host->mrq)
990 return NULL;
991
992 WARN_ON(!host->mrq->cmd);
993 if (!host->mrq->cmd)
994 return NULL;
995
996 WARN_ON(!host->mrq->cmd->data);
997 if (!host->mrq->cmd->data)
998 return NULL;
999
1000 return host->mrq->cmd->data;
1001 }
1002
1003 static void wbsd_tasklet_card(unsigned long param)
1004 {
1005 struct wbsd_host *host = (struct wbsd_host *)param;
1006 u8 csr;
1007 int delay = -1;
1008
1009 spin_lock(&host->lock);
1010
1011 if (host->flags & WBSD_FIGNORE_DETECT) {
1012 spin_unlock(&host->lock);
1013 return;
1014 }
1015
1016 csr = inb(host->base + WBSD_CSR);
1017 WARN_ON(csr == 0xff);
1018
1019 if (csr & WBSD_CARDPRESENT) {
1020 if (!(host->flags & WBSD_FCARD_PRESENT)) {
1021 DBG("Card inserted\n");
1022 host->flags |= WBSD_FCARD_PRESENT;
1023
1024 delay = 500;
1025 }
1026 } else if (host->flags & WBSD_FCARD_PRESENT) {
1027 DBG("Card removed\n");
1028 host->flags &= ~WBSD_FCARD_PRESENT;
1029
1030 if (host->mrq) {
1031 printk(KERN_ERR "%s: Card removed during transfer!\n",
1032 mmc_hostname(host->mmc));
1033 wbsd_reset(host);
1034
1035 host->mrq->cmd->error = -ENOMEDIUM;
1036 tasklet_schedule(&host->finish_tasklet);
1037 }
1038
1039 delay = 0;
1040 }
1041
1042 /*
1043 * Unlock first since we might get a call back.
1044 */
1045
1046 spin_unlock(&host->lock);
1047
1048 if (delay != -1)
1049 mmc_detect_change(host->mmc, msecs_to_jiffies(delay));
1050 }
1051
1052 static void wbsd_tasklet_fifo(unsigned long param)
1053 {
1054 struct wbsd_host *host = (struct wbsd_host *)param;
1055 struct mmc_data *data;
1056
1057 spin_lock(&host->lock);
1058
1059 if (!host->mrq)
1060 goto end;
1061
1062 data = wbsd_get_data(host);
1063 if (!data)
1064 goto end;
1065
1066 if (data->flags & MMC_DATA_WRITE)
1067 wbsd_fill_fifo(host);
1068 else
1069 wbsd_empty_fifo(host);
1070
1071 /*
1072 * Done?
1073 */
1074 if (host->num_sg == 0) {
1075 wbsd_write_index(host, WBSD_IDX_FIFOEN, 0);
1076 tasklet_schedule(&host->finish_tasklet);
1077 }
1078
1079 end:
1080 spin_unlock(&host->lock);
1081 }
1082
1083 static void wbsd_tasklet_crc(unsigned long param)
1084 {
1085 struct wbsd_host *host = (struct wbsd_host *)param;
1086 struct mmc_data *data;
1087
1088 spin_lock(&host->lock);
1089
1090 if (!host->mrq)
1091 goto end;
1092
1093 data = wbsd_get_data(host);
1094 if (!data)
1095 goto end;
1096
1097 DBGF("CRC error\n");
1098
1099 data->error = -EILSEQ;
1100
1101 tasklet_schedule(&host->finish_tasklet);
1102
1103 end:
1104 spin_unlock(&host->lock);
1105 }
1106
1107 static void wbsd_tasklet_timeout(unsigned long param)
1108 {
1109 struct wbsd_host *host = (struct wbsd_host *)param;
1110 struct mmc_data *data;
1111
1112 spin_lock(&host->lock);
1113
1114 if (!host->mrq)
1115 goto end;
1116
1117 data = wbsd_get_data(host);
1118 if (!data)
1119 goto end;
1120
1121 DBGF("Timeout\n");
1122
1123 data->error = -ETIMEDOUT;
1124
1125 tasklet_schedule(&host->finish_tasklet);
1126
1127 end:
1128 spin_unlock(&host->lock);
1129 }
1130
1131 static void wbsd_tasklet_finish(unsigned long param)
1132 {
1133 struct wbsd_host *host = (struct wbsd_host *)param;
1134 struct mmc_data *data;
1135
1136 spin_lock(&host->lock);
1137
1138 WARN_ON(!host->mrq);
1139 if (!host->mrq)
1140 goto end;
1141
1142 data = wbsd_get_data(host);
1143 if (!data)
1144 goto end;
1145
1146 wbsd_finish_data(host, data);
1147
1148 end:
1149 spin_unlock(&host->lock);
1150 }
1151
1152 /*
1153 * Interrupt handling
1154 */
1155
1156 static irqreturn_t wbsd_irq(int irq, void *dev_id)
1157 {
1158 struct wbsd_host *host = dev_id;
1159 int isr;
1160
1161 isr = inb(host->base + WBSD_ISR);
1162
1163 /*
1164 * Was it actually our hardware that caused the interrupt?
1165 */
1166 if (isr == 0xff || isr == 0x00)
1167 return IRQ_NONE;
1168
1169 host->isr |= isr;
1170
1171 /*
1172 * Schedule tasklets as needed.
1173 */
1174 if (isr & WBSD_INT_CARD)
1175 tasklet_schedule(&host->card_tasklet);
1176 if (isr & WBSD_INT_FIFO_THRE)
1177 tasklet_schedule(&host->fifo_tasklet);
1178 if (isr & WBSD_INT_CRC)
1179 tasklet_hi_schedule(&host->crc_tasklet);
1180 if (isr & WBSD_INT_TIMEOUT)
1181 tasklet_hi_schedule(&host->timeout_tasklet);
1182 if (isr & WBSD_INT_TC)
1183 tasklet_schedule(&host->finish_tasklet);
1184
1185 return IRQ_HANDLED;
1186 }
1187
1188 /*****************************************************************************\
1189 * *
1190 * Device initialisation and shutdown *
1191 * *
1192 \*****************************************************************************/
1193
1194 /*
1195 * Allocate/free MMC structure.
1196 */
1197
1198 static int __devinit wbsd_alloc_mmc(struct device *dev)
1199 {
1200 struct mmc_host *mmc;
1201 struct wbsd_host *host;
1202
1203 /*
1204 * Allocate MMC structure.
1205 */
1206 mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev);
1207 if (!mmc)
1208 return -ENOMEM;
1209
1210 host = mmc_priv(mmc);
1211 host->mmc = mmc;
1212
1213 host->dma = -1;
1214
1215 /*
1216 * Set host parameters.
1217 */
1218 mmc->ops = &wbsd_ops;
1219 mmc->f_min = 375000;
1220 mmc->f_max = 24000000;
1221 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
1222 mmc->caps = MMC_CAP_4_BIT_DATA;
1223
1224 spin_lock_init(&host->lock);
1225
1226 /*
1227 * Set up timers
1228 */
1229 init_timer(&host->ignore_timer);
1230 host->ignore_timer.data = (unsigned long)host;
1231 host->ignore_timer.function = wbsd_reset_ignore;
1232
1233 /*
1234 * Maximum number of segments. Worst case is one sector per segment
1235 * so this will be 64kB/512.
1236 */
1237 mmc->max_hw_segs = 128;
1238 mmc->max_phys_segs = 128;
1239
1240 /*
1241 * Maximum request size. Also limited by 64KiB buffer.
1242 */
1243 mmc->max_req_size = 65536;
1244
1245 /*
1246 * Maximum segment size. Could be one segment with the maximum number
1247 * of bytes.
1248 */
1249 mmc->max_seg_size = mmc->max_req_size;
1250
1251 /*
1252 * Maximum block size. We have 12 bits (= 4095) but have to subtract
1253 * space for CRC. So the maximum is 4095 - 4*2 = 4087.
1254 */
1255 mmc->max_blk_size = 4087;
1256
1257 /*
1258 * Maximum block count. There is no real limit so the maximum
1259 * request size will be the only restriction.
1260 */
1261 mmc->max_blk_count = mmc->max_req_size;
1262
1263 dev_set_drvdata(dev, mmc);
1264
1265 return 0;
1266 }
1267
1268 static void wbsd_free_mmc(struct device *dev)
1269 {
1270 struct mmc_host *mmc;
1271 struct wbsd_host *host;
1272
1273 mmc = dev_get_drvdata(dev);
1274 if (!mmc)
1275 return;
1276
1277 host = mmc_priv(mmc);
1278 BUG_ON(host == NULL);
1279
1280 del_timer_sync(&host->ignore_timer);
1281
1282 mmc_free_host(mmc);
1283
1284 dev_set_drvdata(dev, NULL);
1285 }
1286
1287 /*
1288 * Scan for known chip id:s
1289 */
1290
1291 static int __devinit wbsd_scan(struct wbsd_host *host)
1292 {
1293 int i, j, k;
1294 int id;
1295
1296 /*
1297 * Iterate through all ports, all codes to
1298 * find hardware that is in our known list.
1299 */
1300 for (i = 0; i < ARRAY_SIZE(config_ports); i++) {
1301 if (!request_region(config_ports[i], 2, DRIVER_NAME))
1302 continue;
1303
1304 for (j = 0; j < ARRAY_SIZE(unlock_codes); j++) {
1305 id = 0xFFFF;
1306
1307 host->config = config_ports[i];
1308 host->unlock_code = unlock_codes[j];
1309
1310 wbsd_unlock_config(host);
1311
1312 outb(WBSD_CONF_ID_HI, config_ports[i]);
1313 id = inb(config_ports[i] + 1) << 8;
1314
1315 outb(WBSD_CONF_ID_LO, config_ports[i]);
1316 id |= inb(config_ports[i] + 1);
1317
1318 wbsd_lock_config(host);
1319
1320 for (k = 0; k < ARRAY_SIZE(valid_ids); k++) {
1321 if (id == valid_ids[k]) {
1322 host->chip_id = id;
1323
1324 return 0;
1325 }
1326 }
1327
1328 if (id != 0xFFFF) {
1329 DBG("Unknown hardware (id %x) found at %x\n",
1330 id, config_ports[i]);
1331 }
1332 }
1333
1334 release_region(config_ports[i], 2);
1335 }
1336
1337 host->config = 0;
1338 host->unlock_code = 0;
1339
1340 return -ENODEV;
1341 }
1342
1343 /*
1344 * Allocate/free io port ranges
1345 */
1346
1347 static int __devinit wbsd_request_region(struct wbsd_host *host, int base)
1348 {
1349 if (base & 0x7)
1350 return -EINVAL;
1351
1352 if (!request_region(base, 8, DRIVER_NAME))
1353 return -EIO;
1354
1355 host->base = base;
1356
1357 return 0;
1358 }
1359
1360 static void wbsd_release_regions(struct wbsd_host *host)
1361 {
1362 if (host->base)
1363 release_region(host->base, 8);
1364
1365 host->base = 0;
1366
1367 if (host->config)
1368 release_region(host->config, 2);
1369
1370 host->config = 0;
1371 }
1372
1373 /*
1374 * Allocate/free DMA port and buffer
1375 */
1376
1377 static void __devinit wbsd_request_dma(struct wbsd_host *host, int dma)
1378 {
1379 if (dma < 0)
1380 return;
1381
1382 if (request_dma(dma, DRIVER_NAME))
1383 goto err;
1384
1385 /*
1386 * We need to allocate a special buffer in
1387 * order for ISA to be able to DMA to it.
1388 */
1389 host->dma_buffer = kmalloc(WBSD_DMA_SIZE,
1390 GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN);
1391 if (!host->dma_buffer)
1392 goto free;
1393
1394 /*
1395 * Translate the address to a physical address.
1396 */
1397 host->dma_addr = dma_map_single(mmc_dev(host->mmc), host->dma_buffer,
1398 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
1399
1400 /*
1401 * ISA DMA must be aligned on a 64k basis.
1402 */
1403 if ((host->dma_addr & 0xffff) != 0)
1404 goto kfree;
1405 /*
1406 * ISA cannot access memory above 16 MB.
1407 */
1408 else if (host->dma_addr >= 0x1000000)
1409 goto kfree;
1410
1411 host->dma = dma;
1412
1413 return;
1414
1415 kfree:
1416 /*
1417 * If we've gotten here then there is some kind of alignment bug
1418 */
1419 BUG_ON(1);
1420
1421 dma_unmap_single(mmc_dev(host->mmc), host->dma_addr,
1422 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
1423 host->dma_addr = 0;
1424
1425 kfree(host->dma_buffer);
1426 host->dma_buffer = NULL;
1427
1428 free:
1429 free_dma(dma);
1430
1431 err:
1432 printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. "
1433 "Falling back on FIFO.\n", dma);
1434 }
1435
1436 static void wbsd_release_dma(struct wbsd_host *host)
1437 {
1438 if (host->dma_addr) {
1439 dma_unmap_single(mmc_dev(host->mmc), host->dma_addr,
1440 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
1441 }
1442 kfree(host->dma_buffer);
1443 if (host->dma >= 0)
1444 free_dma(host->dma);
1445
1446 host->dma = -1;
1447 host->dma_buffer = NULL;
1448 host->dma_addr = 0;
1449 }
1450
1451 /*
1452 * Allocate/free IRQ.
1453 */
1454
1455 static int __devinit wbsd_request_irq(struct wbsd_host *host, int irq)
1456 {
1457 int ret;
1458
1459 /*
1460 * Set up tasklets. Must be done before requesting interrupt.
1461 */
1462 tasklet_init(&host->card_tasklet, wbsd_tasklet_card,
1463 (unsigned long)host);
1464 tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo,
1465 (unsigned long)host);
1466 tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc,
1467 (unsigned long)host);
1468 tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout,
1469 (unsigned long)host);
1470 tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish,
1471 (unsigned long)host);
1472
1473 /*
1474 * Allocate interrupt.
1475 */
1476 ret = request_irq(irq, wbsd_irq, IRQF_SHARED, DRIVER_NAME, host);
1477 if (ret)
1478 return ret;
1479
1480 host->irq = irq;
1481
1482 return 0;
1483 }
1484
1485 static void wbsd_release_irq(struct wbsd_host *host)
1486 {
1487 if (!host->irq)
1488 return;
1489
1490 free_irq(host->irq, host);
1491
1492 host->irq = 0;
1493
1494 tasklet_kill(&host->card_tasklet);
1495 tasklet_kill(&host->fifo_tasklet);
1496 tasklet_kill(&host->crc_tasklet);
1497 tasklet_kill(&host->timeout_tasklet);
1498 tasklet_kill(&host->finish_tasklet);
1499 }
1500
1501 /*
1502 * Allocate all resources for the host.
1503 */
1504
1505 static int __devinit wbsd_request_resources(struct wbsd_host *host,
1506 int base, int irq, int dma)
1507 {
1508 int ret;
1509
1510 /*
1511 * Allocate I/O ports.
1512 */
1513 ret = wbsd_request_region(host, base);
1514 if (ret)
1515 return ret;
1516
1517 /*
1518 * Allocate interrupt.
1519 */
1520 ret = wbsd_request_irq(host, irq);
1521 if (ret)
1522 return ret;
1523
1524 /*
1525 * Allocate DMA.
1526 */
1527 wbsd_request_dma(host, dma);
1528
1529 return 0;
1530 }
1531
1532 /*
1533 * Release all resources for the host.
1534 */
1535
1536 static void wbsd_release_resources(struct wbsd_host *host)
1537 {
1538 wbsd_release_dma(host);
1539 wbsd_release_irq(host);
1540 wbsd_release_regions(host);
1541 }
1542
1543 /*
1544 * Configure the resources the chip should use.
1545 */
1546
1547 static void wbsd_chip_config(struct wbsd_host *host)
1548 {
1549 wbsd_unlock_config(host);
1550
1551 /*
1552 * Reset the chip.
1553 */
1554 wbsd_write_config(host, WBSD_CONF_SWRST, 1);
1555 wbsd_write_config(host, WBSD_CONF_SWRST, 0);
1556
1557 /*
1558 * Select SD/MMC function.
1559 */
1560 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1561
1562 /*
1563 * Set up card detection.
1564 */
1565 wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11);
1566
1567 /*
1568 * Configure chip
1569 */
1570 wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8);
1571 wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff);
1572
1573 wbsd_write_config(host, WBSD_CONF_IRQ, host->irq);
1574
1575 if (host->dma >= 0)
1576 wbsd_write_config(host, WBSD_CONF_DRQ, host->dma);
1577
1578 /*
1579 * Enable and power up chip.
1580 */
1581 wbsd_write_config(host, WBSD_CONF_ENABLE, 1);
1582 wbsd_write_config(host, WBSD_CONF_POWER, 0x20);
1583
1584 wbsd_lock_config(host);
1585 }
1586
1587 /*
1588 * Check that configured resources are correct.
1589 */
1590
1591 static int wbsd_chip_validate(struct wbsd_host *host)
1592 {
1593 int base, irq, dma;
1594
1595 wbsd_unlock_config(host);
1596
1597 /*
1598 * Select SD/MMC function.
1599 */
1600 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1601
1602 /*
1603 * Read configuration.
1604 */
1605 base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8;
1606 base |= wbsd_read_config(host, WBSD_CONF_PORT_LO);
1607
1608 irq = wbsd_read_config(host, WBSD_CONF_IRQ);
1609
1610 dma = wbsd_read_config(host, WBSD_CONF_DRQ);
1611
1612 wbsd_lock_config(host);
1613
1614 /*
1615 * Validate against given configuration.
1616 */
1617 if (base != host->base)
1618 return 0;
1619 if (irq != host->irq)
1620 return 0;
1621 if ((dma != host->dma) && (host->dma != -1))
1622 return 0;
1623
1624 return 1;
1625 }
1626
1627 /*
1628 * Powers down the SD function
1629 */
1630
1631 static void wbsd_chip_poweroff(struct wbsd_host *host)
1632 {
1633 wbsd_unlock_config(host);
1634
1635 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1636 wbsd_write_config(host, WBSD_CONF_ENABLE, 0);
1637
1638 wbsd_lock_config(host);
1639 }
1640
1641 /*****************************************************************************\
1642 * *
1643 * Devices setup and shutdown *
1644 * *
1645 \*****************************************************************************/
1646
1647 static int __devinit wbsd_init(struct device *dev, int base, int irq, int dma,
1648 int pnp)
1649 {
1650 struct wbsd_host *host = NULL;
1651 struct mmc_host *mmc = NULL;
1652 int ret;
1653
1654 ret = wbsd_alloc_mmc(dev);
1655 if (ret)
1656 return ret;
1657
1658 mmc = dev_get_drvdata(dev);
1659 host = mmc_priv(mmc);
1660
1661 /*
1662 * Scan for hardware.
1663 */
1664 ret = wbsd_scan(host);
1665 if (ret) {
1666 if (pnp && (ret == -ENODEV)) {
1667 printk(KERN_WARNING DRIVER_NAME
1668 ": Unable to confirm device presence. You may "
1669 "experience lock-ups.\n");
1670 } else {
1671 wbsd_free_mmc(dev);
1672 return ret;
1673 }
1674 }
1675
1676 /*
1677 * Request resources.
1678 */
1679 ret = wbsd_request_resources(host, base, irq, dma);
1680 if (ret) {
1681 wbsd_release_resources(host);
1682 wbsd_free_mmc(dev);
1683 return ret;
1684 }
1685
1686 /*
1687 * See if chip needs to be configured.
1688 */
1689 if (pnp) {
1690 if ((host->config != 0) && !wbsd_chip_validate(host)) {
1691 printk(KERN_WARNING DRIVER_NAME
1692 ": PnP active but chip not configured! "
1693 "You probably have a buggy BIOS. "
1694 "Configuring chip manually.\n");
1695 wbsd_chip_config(host);
1696 }
1697 } else
1698 wbsd_chip_config(host);
1699
1700 /*
1701 * Power Management stuff. No idea how this works.
1702 * Not tested.
1703 */
1704 #ifdef CONFIG_PM
1705 if (host->config) {
1706 wbsd_unlock_config(host);
1707 wbsd_write_config(host, WBSD_CONF_PME, 0xA0);
1708 wbsd_lock_config(host);
1709 }
1710 #endif
1711 /*
1712 * Allow device to initialise itself properly.
1713 */
1714 mdelay(5);
1715
1716 /*
1717 * Reset the chip into a known state.
1718 */
1719 wbsd_init_device(host);
1720
1721 mmc_add_host(mmc);
1722
1723 printk(KERN_INFO "%s: W83L51xD", mmc_hostname(mmc));
1724 if (host->chip_id != 0)
1725 printk(" id %x", (int)host->chip_id);
1726 printk(" at 0x%x irq %d", (int)host->base, (int)host->irq);
1727 if (host->dma >= 0)
1728 printk(" dma %d", (int)host->dma);
1729 else
1730 printk(" FIFO");
1731 if (pnp)
1732 printk(" PnP");
1733 printk("\n");
1734
1735 return 0;
1736 }
1737
1738 static void __devexit wbsd_shutdown(struct device *dev, int pnp)
1739 {
1740 struct mmc_host *mmc = dev_get_drvdata(dev);
1741 struct wbsd_host *host;
1742
1743 if (!mmc)
1744 return;
1745
1746 host = mmc_priv(mmc);
1747
1748 mmc_remove_host(mmc);
1749
1750 /*
1751 * Power down the SD/MMC function.
1752 */
1753 if (!pnp)
1754 wbsd_chip_poweroff(host);
1755
1756 wbsd_release_resources(host);
1757
1758 wbsd_free_mmc(dev);
1759 }
1760
1761 /*
1762 * Non-PnP
1763 */
1764
1765 static int __devinit wbsd_probe(struct platform_device *dev)
1766 {
1767 /* Use the module parameters for resources */
1768 return wbsd_init(&dev->dev, param_io, param_irq, param_dma, 0);
1769 }
1770
1771 static int __devexit wbsd_remove(struct platform_device *dev)
1772 {
1773 wbsd_shutdown(&dev->dev, 0);
1774
1775 return 0;
1776 }
1777
1778 /*
1779 * PnP
1780 */
1781
1782 #ifdef CONFIG_PNP
1783
1784 static int __devinit
1785 wbsd_pnp_probe(struct pnp_dev *pnpdev, const struct pnp_device_id *dev_id)
1786 {
1787 int io, irq, dma;
1788
1789 /*
1790 * Get resources from PnP layer.
1791 */
1792 io = pnp_port_start(pnpdev, 0);
1793 irq = pnp_irq(pnpdev, 0);
1794 if (pnp_dma_valid(pnpdev, 0))
1795 dma = pnp_dma(pnpdev, 0);
1796 else
1797 dma = -1;
1798
1799 DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma);
1800
1801 return wbsd_init(&pnpdev->dev, io, irq, dma, 1);
1802 }
1803
1804 static void __devexit wbsd_pnp_remove(struct pnp_dev *dev)
1805 {
1806 wbsd_shutdown(&dev->dev, 1);
1807 }
1808
1809 #endif /* CONFIG_PNP */
1810
1811 /*
1812 * Power management
1813 */
1814
1815 #ifdef CONFIG_PM
1816
1817 static int wbsd_suspend(struct wbsd_host *host, pm_message_t state)
1818 {
1819 BUG_ON(host == NULL);
1820
1821 return mmc_suspend_host(host->mmc, state);
1822 }
1823
1824 static int wbsd_resume(struct wbsd_host *host)
1825 {
1826 BUG_ON(host == NULL);
1827
1828 wbsd_init_device(host);
1829
1830 return mmc_resume_host(host->mmc);
1831 }
1832
1833 static int wbsd_platform_suspend(struct platform_device *dev,
1834 pm_message_t state)
1835 {
1836 struct mmc_host *mmc = platform_get_drvdata(dev);
1837 struct wbsd_host *host;
1838 int ret;
1839
1840 if (mmc == NULL)
1841 return 0;
1842
1843 DBGF("Suspending...\n");
1844
1845 host = mmc_priv(mmc);
1846
1847 ret = wbsd_suspend(host, state);
1848 if (ret)
1849 return ret;
1850
1851 wbsd_chip_poweroff(host);
1852
1853 return 0;
1854 }
1855
1856 static int wbsd_platform_resume(struct platform_device *dev)
1857 {
1858 struct mmc_host *mmc = platform_get_drvdata(dev);
1859 struct wbsd_host *host;
1860
1861 if (mmc == NULL)
1862 return 0;
1863
1864 DBGF("Resuming...\n");
1865
1866 host = mmc_priv(mmc);
1867
1868 wbsd_chip_config(host);
1869
1870 /*
1871 * Allow device to initialise itself properly.
1872 */
1873 mdelay(5);
1874
1875 return wbsd_resume(host);
1876 }
1877
1878 #ifdef CONFIG_PNP
1879
1880 static int wbsd_pnp_suspend(struct pnp_dev *pnp_dev, pm_message_t state)
1881 {
1882 struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev);
1883 struct wbsd_host *host;
1884
1885 if (mmc == NULL)
1886 return 0;
1887
1888 DBGF("Suspending...\n");
1889
1890 host = mmc_priv(mmc);
1891
1892 return wbsd_suspend(host, state);
1893 }
1894
1895 static int wbsd_pnp_resume(struct pnp_dev *pnp_dev)
1896 {
1897 struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev);
1898 struct wbsd_host *host;
1899
1900 if (mmc == NULL)
1901 return 0;
1902
1903 DBGF("Resuming...\n");
1904
1905 host = mmc_priv(mmc);
1906
1907 /*
1908 * See if chip needs to be configured.
1909 */
1910 if (host->config != 0) {
1911 if (!wbsd_chip_validate(host)) {
1912 printk(KERN_WARNING DRIVER_NAME
1913 ": PnP active but chip not configured! "
1914 "You probably have a buggy BIOS. "
1915 "Configuring chip manually.\n");
1916 wbsd_chip_config(host);
1917 }
1918 }
1919
1920 /*
1921 * Allow device to initialise itself properly.
1922 */
1923 mdelay(5);
1924
1925 return wbsd_resume(host);
1926 }
1927
1928 #endif /* CONFIG_PNP */
1929
1930 #else /* CONFIG_PM */
1931
1932 #define wbsd_platform_suspend NULL
1933 #define wbsd_platform_resume NULL
1934
1935 #define wbsd_pnp_suspend NULL
1936 #define wbsd_pnp_resume NULL
1937
1938 #endif /* CONFIG_PM */
1939
1940 static struct platform_device *wbsd_device;
1941
1942 static struct platform_driver wbsd_driver = {
1943 .probe = wbsd_probe,
1944 .remove = __devexit_p(wbsd_remove),
1945
1946 .suspend = wbsd_platform_suspend,
1947 .resume = wbsd_platform_resume,
1948 .driver = {
1949 .name = DRIVER_NAME,
1950 .owner = THIS_MODULE,
1951 },
1952 };
1953
1954 #ifdef CONFIG_PNP
1955
1956 static struct pnp_driver wbsd_pnp_driver = {
1957 .name = DRIVER_NAME,
1958 .id_table = pnp_dev_table,
1959 .probe = wbsd_pnp_probe,
1960 .remove = __devexit_p(wbsd_pnp_remove),
1961
1962 .suspend = wbsd_pnp_suspend,
1963 .resume = wbsd_pnp_resume,
1964 };
1965
1966 #endif /* CONFIG_PNP */
1967
1968 /*
1969 * Module loading/unloading
1970 */
1971
1972 static int __init wbsd_drv_init(void)
1973 {
1974 int result;
1975
1976 printk(KERN_INFO DRIVER_NAME
1977 ": Winbond W83L51xD SD/MMC card interface driver\n");
1978 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1979
1980 #ifdef CONFIG_PNP
1981
1982 if (!param_nopnp) {
1983 result = pnp_register_driver(&wbsd_pnp_driver);
1984 if (result < 0)
1985 return result;
1986 }
1987 #endif /* CONFIG_PNP */
1988
1989 if (param_nopnp) {
1990 result = platform_driver_register(&wbsd_driver);
1991 if (result < 0)
1992 return result;
1993
1994 wbsd_device = platform_device_alloc(DRIVER_NAME, -1);
1995 if (!wbsd_device) {
1996 platform_driver_unregister(&wbsd_driver);
1997 return -ENOMEM;
1998 }
1999
2000 result = platform_device_add(wbsd_device);
2001 if (result) {
2002 platform_device_put(wbsd_device);
2003 platform_driver_unregister(&wbsd_driver);
2004 return result;
2005 }
2006 }
2007
2008 return 0;
2009 }
2010
2011 static void __exit wbsd_drv_exit(void)
2012 {
2013 #ifdef CONFIG_PNP
2014
2015 if (!param_nopnp)
2016 pnp_unregister_driver(&wbsd_pnp_driver);
2017
2018 #endif /* CONFIG_PNP */
2019
2020 if (param_nopnp) {
2021 platform_device_unregister(wbsd_device);
2022
2023 platform_driver_unregister(&wbsd_driver);
2024 }
2025
2026 DBG("unloaded\n");
2027 }
2028
2029 module_init(wbsd_drv_init);
2030 module_exit(wbsd_drv_exit);
2031 #ifdef CONFIG_PNP
2032 module_param_named(nopnp, param_nopnp, uint, 0444);
2033 #endif
2034 module_param_named(io, param_io, uint, 0444);
2035 module_param_named(irq, param_irq, uint, 0444);
2036 module_param_named(dma, param_dma, int, 0444);
2037
2038 MODULE_LICENSE("GPL");
2039 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
2040 MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver");
2041
2042 #ifdef CONFIG_PNP
2043 MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)");
2044 #endif
2045 MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)");
2046 MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)");
2047 MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)");
2048
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