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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
52
53
54#ifdef CONFIG_PNP
55
56static const struct pnp_device_id pnp_dev_table[] = {
57 { "WEC0517", 0 },
58 { "WEC0518", 0 },
59 { "", 0 },
60};
61
62MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
63
64#endif
65
66static const int config_ports[] = { 0x2E, 0x4E };
67static const int unlock_codes[] = { 0x83, 0x87 };
68
69static const int valid_ids[] = {
70 0x7112,
71};
72
73#ifdef CONFIG_PNP
74static unsigned int param_nopnp = 0;
75#else
76static const unsigned int param_nopnp = 1;
77#endif
78static unsigned int param_io = 0x248;
79static unsigned int param_irq = 6;
80static int param_dma = 2;
81
82
83
84
85
86static 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
94static 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
101static 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
109static 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
117static 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
123static 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
131
132
133static void wbsd_init_device(struct wbsd_host *host)
134{
135 u8 setup, ier;
136
137
138
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
146
147 setup &= ~WBSD_DAT3_H;
148 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
149 host->flags &= ~WBSD_FIGNORE_DETECT;
150
151
152
153
154 host->clk = wbsd_read_index(host, WBSD_IDX_CLK);
155
156
157
158
159 outb(WBSD_POWER_N, host->base + WBSD_CSR);
160
161
162
163
164 wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F);
165
166
167
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
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
188
189 inb(host->base + WBSD_ISR);
190}
191
192static 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
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
206static 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
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
221
222 wbsd_write_index(host, WBSD_IDX_DMA, 0);
223 }
224
225 host->mrq = NULL;
226
227
228
229
230 spin_unlock(&host->lock);
231 mmc_request_done(host->mmc, mrq);
232 spin_lock(&host->lock);
233}
234
235
236
237
238
239static inline void wbsd_init_sg(struct wbsd_host *host, struct mmc_data *data)
240{
241
242
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
251static inline int wbsd_next_sg(struct wbsd_host *host)
252{
253
254
255
256 host->cur_sg++;
257 host->num_sg--;
258
259
260
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
270static inline char *wbsd_sg_to_buffer(struct wbsd_host *host)
271{
272 return sg_virt(host->cur_sg);
273}
274
275static 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
292static 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
311
312
313static inline void wbsd_get_short_reply(struct wbsd_host *host,
314 struct mmc_command *cmd)
315{
316
317
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
331static inline void wbsd_get_long_reply(struct wbsd_host *host,
332 struct mmc_command *cmd)
333{
334 int i;
335
336
337
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
356static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd)
357{
358 int i;
359 u8 status, isr;
360
361
362
363
364
365
366 host->isr = 0;
367
368
369
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
379
380 do {
381 status = wbsd_read_index(host, WBSD_IDX_STATUS);
382 } while (status & WBSD_CARDTRAFFIC);
383
384
385
386
387 if (cmd->flags & MMC_RSP_PRESENT) {
388
389
390
391 isr = host->isr;
392
393
394 if (isr & WBSD_INT_CARD)
395 cmd->error = -ENOMEDIUM;
396
397 else if (isr & WBSD_INT_TIMEOUT)
398 cmd->error = -ETIMEDOUT;
399
400 else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC))
401 cmd->error = -EILSEQ;
402
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
414
415
416static 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
424
425 if (host->num_sg == 0)
426 return;
427
428 buffer = wbsd_sg_to_buffer(host) + host->offset;
429
430
431
432
433
434 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) {
435
436
437
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
456
457 if (host->remain == 0) {
458
459
460
461 if (!wbsd_next_sg(host))
462 return;
463
464 buffer = wbsd_sg_to_buffer(host);
465 }
466 }
467 }
468
469
470
471
472
473
474 if ((data->blocks * data->blksz - data->bytes_xfered) < 16)
475 tasklet_schedule(&host->fifo_tasklet);
476}
477
478static 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
486
487
488 if (host->num_sg == 0)
489 return;
490
491 buffer = wbsd_sg_to_buffer(host) + host->offset;
492
493
494
495
496
497 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) {
498
499
500
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
519
520 if (host->remain == 0) {
521
522
523
524 if (!wbsd_next_sg(host))
525 return;
526
527 buffer = wbsd_sg_to_buffer(host);
528 }
529 }
530 }
531
532
533
534
535
536
537 tasklet_schedule(&host->fifo_tasklet);
538}
539
540static 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
549
550 size = data->blocks * data->blksz;
551
552
553
554
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
570
571
572
573
574
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
594
595
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
603
604 if (host->dma >= 0) {
605
606
607
608 BUG_ON(size > 0x10000);
609 if (size > 0x10000) {
610 data->error = -EINVAL;
611 return;
612 }
613
614
615
616
617
618 if (data->flags & MMC_DATA_WRITE)
619 wbsd_sg_to_dma(host, data);
620
621
622
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
639
640 wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE);
641 } else {
642
643
644
645
646 host->firsterr = 1;
647
648
649
650
651 wbsd_init_sg(host, data);
652
653
654
655
656 wbsd_write_index(host, WBSD_IDX_DMA, 0);
657
658
659
660
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
675static 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
685
686 if (data->stop)
687 wbsd_send_command(host, data->stop);
688
689
690
691
692
693 do {
694 status = wbsd_read_index(host, WBSD_IDX_STATUS);
695 } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE));
696
697
698
699
700 if (host->dma >= 0) {
701
702
703
704 wbsd_write_index(host, WBSD_IDX_DMA, 0);
705
706
707
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
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
732
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
750
751
752
753static 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
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
771
772 if (!(host->flags & WBSD_FCARD_PRESENT)) {
773 cmd->error = -ENOMEDIUM;
774 goto done;
775 }
776
777 if (cmd->data) {
778
779
780
781
782
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
799
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
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
829
830
831
832 if (cmd->data && !cmd->error) {
833
834
835
836 if (host->dma == -1)
837 tasklet_schedule(&host->fifo_tasklet);
838
839 spin_unlock_bh(&host->lock);
840
841 return;
842 }
843
844done:
845 wbsd_request_end(host, mrq);
846
847 spin_unlock_bh(&host->lock);
848}
849
850static 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
859
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
875
876
877 if (clk != host->clk) {
878 wbsd_write_index(host, WBSD_IDX_CLK, clk);
879 host->clk = clk;
880 }
881
882
883
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
893
894
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
907
908
909 mod_timer(&host->ignore_timer, jiffies + HZ / 100);
910 }
911 }
912 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
913
914
915
916
917
918 host->bus_width = ios->bus_width;
919
920 spin_unlock_bh(&host->lock);
921}
922
923static 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
945static 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
954
955
956
957
958
959
960
961static 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
975
976
977 tasklet_schedule(&host->card_tasklet);
978
979 spin_unlock_bh(&host->lock);
980}
981
982
983
984
985
986static 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
1003static 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
1044
1045
1046 spin_unlock(&host->lock);
1047
1048 if (delay != -1)
1049 mmc_detect_change(host->mmc, msecs_to_jiffies(delay));
1050}
1051
1052static 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
1073
1074 if (host->num_sg == 0) {
1075 wbsd_write_index(host, WBSD_IDX_FIFOEN, 0);
1076 tasklet_schedule(&host->finish_tasklet);
1077 }
1078
1079end:
1080 spin_unlock(&host->lock);
1081}
1082
1083static 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
1103end:
1104 spin_unlock(&host->lock);
1105}
1106
1107static 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
1127end:
1128 spin_unlock(&host->lock);
1129}
1130
1131static 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
1148end:
1149 spin_unlock(&host->lock);
1150}
1151
1152
1153
1154
1155
1156static 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
1165
1166 if (isr == 0xff || isr == 0x00)
1167 return IRQ_NONE;
1168
1169 host->isr |= isr;
1170
1171
1172
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
1191
1192
1193
1194
1195
1196
1197
1198static int __devinit wbsd_alloc_mmc(struct device *dev)
1199{
1200 struct mmc_host *mmc;
1201 struct wbsd_host *host;
1202
1203
1204
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
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
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
1235
1236
1237 mmc->max_hw_segs = 128;
1238 mmc->max_phys_segs = 128;
1239
1240
1241
1242
1243 mmc->max_req_size = 65536;
1244
1245
1246
1247
1248
1249 mmc->max_seg_size = mmc->max_req_size;
1250
1251
1252
1253
1254
1255 mmc->max_blk_size = 4087;
1256
1257
1258
1259
1260
1261 mmc->max_blk_count = mmc->max_req_size;
1262
1263 dev_set_drvdata(dev, mmc);
1264
1265 return 0;
1266}
1267
1268static 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
1289
1290
1291static int __devinit wbsd_scan(struct wbsd_host *host)
1292{
1293 int i, j, k;
1294 int id;
1295
1296
1297
1298
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
1345
1346
1347static 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
1360static 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
1375
1376
1377static 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
1387
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
1396
1397 host->dma_addr = dma_map_single(mmc_dev(host->mmc), host->dma_buffer,
1398 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
1399
1400
1401
1402
1403 if ((host->dma_addr & 0xffff) != 0)
1404 goto kfree;
1405
1406
1407
1408 else if (host->dma_addr >= 0x1000000)
1409 goto kfree;
1410
1411 host->dma = dma;
1412
1413 return;
1414
1415kfree:
1416
1417
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
1428free:
1429 free_dma(dma);
1430
1431err:
1432 printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. "
1433 "Falling back on FIFO.\n", dma);
1434}
1435
1436static 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
1453
1454
1455static int __devinit wbsd_request_irq(struct wbsd_host *host, int irq)
1456{
1457 int ret;
1458
1459
1460
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
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
1485static 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
1503
1504
1505static int __devinit wbsd_request_resources(struct wbsd_host *host,
1506 int base, int irq, int dma)
1507{
1508 int ret;
1509
1510
1511
1512
1513 ret = wbsd_request_region(host, base);
1514 if (ret)
1515 return ret;
1516
1517
1518
1519
1520 ret = wbsd_request_irq(host, irq);
1521 if (ret)
1522 return ret;
1523
1524
1525
1526
1527 wbsd_request_dma(host, dma);
1528
1529 return 0;
1530}
1531
1532
1533
1534
1535
1536static 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
1545
1546
1547static void wbsd_chip_config(struct wbsd_host *host)
1548{
1549 wbsd_unlock_config(host);
1550
1551
1552
1553
1554 wbsd_write_config(host, WBSD_CONF_SWRST, 1);
1555 wbsd_write_config(host, WBSD_CONF_SWRST, 0);
1556
1557
1558
1559
1560 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1561
1562
1563
1564
1565 wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11);
1566
1567
1568
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
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
1589
1590
1591static int wbsd_chip_validate(struct wbsd_host *host)
1592{
1593 int base, irq, dma;
1594
1595 wbsd_unlock_config(host);
1596
1597
1598
1599
1600 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1601
1602
1603
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
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
1629
1630
1631static 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
1644
1645
1646
1647static 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
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
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
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
1702
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
1713
1714 mdelay(5);
1715
1716
1717
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
1738static 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
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
1763
1764
1765static int __devinit wbsd_probe(struct platform_device *dev)
1766{
1767
1768 return wbsd_init(&dev->dev, param_io, param_irq, param_dma, 0);
1769}
1770
1771static int __devexit wbsd_remove(struct platform_device *dev)
1772{
1773 wbsd_shutdown(&dev->dev, 0);
1774
1775 return 0;
1776}
1777
1778
1779
1780
1781
1782#ifdef CONFIG_PNP
1783
1784static int __devinit
1785wbsd_pnp_probe(struct pnp_dev *pnpdev, const struct pnp_device_id *dev_id)
1786{
1787 int io, irq, dma;
1788
1789
1790
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
1804static void __devexit wbsd_pnp_remove(struct pnp_dev *dev)
1805{
1806 wbsd_shutdown(&dev->dev, 1);
1807}
1808
1809#endif
1810
1811
1812
1813
1814
1815#ifdef CONFIG_PM
1816
1817static 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
1824static 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
1833static 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
1856static 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
1872
1873 mdelay(5);
1874
1875 return wbsd_resume(host);
1876}
1877
1878#ifdef CONFIG_PNP
1879
1880static 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
1895static 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
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
1922
1923 mdelay(5);
1924
1925 return wbsd_resume(host);
1926}
1927
1928#endif
1929
1930#else
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
1939
1940static struct platform_device *wbsd_device;
1941
1942static 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
1956static 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
1967
1968
1969
1970
1971
1972static 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
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
2011static 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
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
2029module_init(wbsd_drv_init);
2030module_exit(wbsd_drv_exit);
2031#ifdef CONFIG_PNP
2032module_param_named(nopnp, param_nopnp, uint, 0444);
2033#endif
2034module_param_named(io, param_io, uint, 0444);
2035module_param_named(irq, param_irq, uint, 0444);
2036module_param_named(dma, param_dma, int, 0444);
2037
2038MODULE_LICENSE("GPL");
2039MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
2040MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver");
2041
2042#ifdef CONFIG_PNP
2043MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)");
2044#endif
2045MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)");
2046MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)");
2047MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)");
2048