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1da177e4 LT |
1 | /* |
2 | * linux/drivers/mmc/wbsd.c - Winbond W83L51xD SD/MMC driver | |
3 | * | |
4 | * Copyright (C) 2004-2005 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 version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * | |
11 | * Warning! | |
12 | * | |
13 | * Changes to the FIFO system should be done with extreme care since | |
14 | * the hardware is full of bugs related to the FIFO. Known issues are: | |
15 | * | |
16 | * - FIFO size field in FSR is always zero. | |
17 | * | |
18 | * - FIFO interrupts tend not to work as they should. Interrupts are | |
19 | * triggered only for full/empty events, not for threshold values. | |
20 | * | |
21 | * - On APIC systems the FIFO empty interrupt is sometimes lost. | |
22 | */ | |
23 | ||
24 | #include <linux/config.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/moduleparam.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/ioport.h> | |
29 | #include <linux/device.h> | |
30 | #include <linux/interrupt.h> | |
85bcc130 | 31 | #include <linux/dma-mapping.h> |
1da177e4 | 32 | #include <linux/delay.h> |
85bcc130 | 33 | #include <linux/pnp.h> |
1da177e4 LT |
34 | #include <linux/highmem.h> |
35 | #include <linux/mmc/host.h> | |
36 | #include <linux/mmc/protocol.h> | |
37 | ||
38 | #include <asm/io.h> | |
39 | #include <asm/dma.h> | |
40 | #include <asm/scatterlist.h> | |
41 | ||
42 | #include "wbsd.h" | |
43 | ||
44 | #define DRIVER_NAME "wbsd" | |
3462b925 | 45 | #define DRIVER_VERSION "1.3" |
1da177e4 LT |
46 | |
47 | #ifdef CONFIG_MMC_DEBUG | |
48 | #define DBG(x...) \ | |
49 | printk(KERN_DEBUG DRIVER_NAME ": " x) | |
50 | #define DBGF(f, x...) \ | |
51 | printk(KERN_DEBUG DRIVER_NAME " [%s()]: " f, __func__ , ##x) | |
52 | #else | |
53 | #define DBG(x...) do { } while (0) | |
54 | #define DBGF(x...) do { } while (0) | |
55 | #endif | |
56 | ||
85bcc130 PO |
57 | /* |
58 | * Device resources | |
59 | */ | |
60 | ||
61 | #ifdef CONFIG_PNP | |
62 | ||
63 | static const struct pnp_device_id pnp_dev_table[] = { | |
64 | { "WEC0517", 0 }, | |
65 | { "WEC0518", 0 }, | |
66 | { "", 0 }, | |
67 | }; | |
68 | ||
69 | MODULE_DEVICE_TABLE(pnp, pnp_dev_table); | |
70 | ||
71 | #endif /* CONFIG_PNP */ | |
72 | ||
3eee0d03 AB |
73 | static const int config_ports[] = { 0x2E, 0x4E }; |
74 | static const int unlock_codes[] = { 0x83, 0x87 }; | |
75 | ||
76 | static const int valid_ids[] = { | |
77 | 0x7112, | |
78 | }; | |
79 | ||
85bcc130 PO |
80 | #ifdef CONFIG_PNP |
81 | static unsigned int nopnp = 0; | |
82 | #else | |
83 | static const unsigned int nopnp = 1; | |
84 | #endif | |
85 | static unsigned int io = 0x248; | |
86 | static unsigned int irq = 6; | |
87 | static int dma = 2; | |
88 | ||
1da177e4 LT |
89 | /* |
90 | * Basic functions | |
91 | */ | |
92 | ||
93 | static inline void wbsd_unlock_config(struct wbsd_host* host) | |
94 | { | |
85bcc130 PO |
95 | BUG_ON(host->config == 0); |
96 | ||
1da177e4 LT |
97 | outb(host->unlock_code, host->config); |
98 | outb(host->unlock_code, host->config); | |
99 | } | |
100 | ||
101 | static inline void wbsd_lock_config(struct wbsd_host* host) | |
102 | { | |
85bcc130 PO |
103 | BUG_ON(host->config == 0); |
104 | ||
1da177e4 LT |
105 | outb(LOCK_CODE, host->config); |
106 | } | |
107 | ||
108 | static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value) | |
109 | { | |
85bcc130 PO |
110 | BUG_ON(host->config == 0); |
111 | ||
1da177e4 LT |
112 | outb(reg, host->config); |
113 | outb(value, host->config + 1); | |
114 | } | |
115 | ||
116 | static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg) | |
117 | { | |
85bcc130 PO |
118 | BUG_ON(host->config == 0); |
119 | ||
1da177e4 LT |
120 | outb(reg, host->config); |
121 | return inb(host->config + 1); | |
122 | } | |
123 | ||
124 | static inline void wbsd_write_index(struct wbsd_host* host, u8 index, u8 value) | |
125 | { | |
126 | outb(index, host->base + WBSD_IDXR); | |
127 | outb(value, host->base + WBSD_DATAR); | |
128 | } | |
129 | ||
130 | static inline u8 wbsd_read_index(struct wbsd_host* host, u8 index) | |
131 | { | |
132 | outb(index, host->base + WBSD_IDXR); | |
133 | return inb(host->base + WBSD_DATAR); | |
134 | } | |
135 | ||
136 | /* | |
137 | * Common routines | |
138 | */ | |
139 | ||
140 | static void wbsd_init_device(struct wbsd_host* host) | |
141 | { | |
142 | u8 setup, ier; | |
143 | ||
144 | /* | |
145 | * Reset chip (SD/MMC part) and fifo. | |
146 | */ | |
147 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
148 | setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET; | |
149 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
150 | ||
85bcc130 PO |
151 | /* |
152 | * Set DAT3 to input | |
153 | */ | |
154 | setup &= ~WBSD_DAT3_H; | |
155 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
156 | host->flags &= ~WBSD_FIGNORE_DETECT; | |
157 | ||
1da177e4 LT |
158 | /* |
159 | * Read back default clock. | |
160 | */ | |
161 | host->clk = wbsd_read_index(host, WBSD_IDX_CLK); | |
162 | ||
163 | /* | |
164 | * Power down port. | |
165 | */ | |
166 | outb(WBSD_POWER_N, host->base + WBSD_CSR); | |
167 | ||
168 | /* | |
169 | * Set maximum timeout. | |
170 | */ | |
171 | wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F); | |
172 | ||
85bcc130 PO |
173 | /* |
174 | * Test for card presence | |
175 | */ | |
176 | if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT) | |
177 | host->flags |= WBSD_FCARD_PRESENT; | |
178 | else | |
179 | host->flags &= ~WBSD_FCARD_PRESENT; | |
180 | ||
1da177e4 LT |
181 | /* |
182 | * Enable interesting interrupts. | |
183 | */ | |
184 | ier = 0; | |
185 | ier |= WBSD_EINT_CARD; | |
186 | ier |= WBSD_EINT_FIFO_THRE; | |
187 | ier |= WBSD_EINT_CCRC; | |
188 | ier |= WBSD_EINT_TIMEOUT; | |
189 | ier |= WBSD_EINT_CRC; | |
190 | ier |= WBSD_EINT_TC; | |
191 | ||
192 | outb(ier, host->base + WBSD_EIR); | |
193 | ||
194 | /* | |
195 | * Clear interrupts. | |
196 | */ | |
197 | inb(host->base + WBSD_ISR); | |
198 | } | |
199 | ||
200 | static void wbsd_reset(struct wbsd_host* host) | |
201 | { | |
202 | u8 setup; | |
203 | ||
204 | printk(KERN_ERR DRIVER_NAME ": Resetting chip\n"); | |
205 | ||
206 | /* | |
207 | * Soft reset of chip (SD/MMC part). | |
208 | */ | |
209 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
210 | setup |= WBSD_SOFT_RESET; | |
211 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
212 | } | |
213 | ||
214 | static void wbsd_request_end(struct wbsd_host* host, struct mmc_request* mrq) | |
215 | { | |
216 | unsigned long dmaflags; | |
217 | ||
218 | DBGF("Ending request, cmd (%x)\n", mrq->cmd->opcode); | |
219 | ||
220 | if (host->dma >= 0) | |
221 | { | |
222 | /* | |
223 | * Release ISA DMA controller. | |
224 | */ | |
225 | dmaflags = claim_dma_lock(); | |
226 | disable_dma(host->dma); | |
227 | clear_dma_ff(host->dma); | |
228 | release_dma_lock(dmaflags); | |
229 | ||
230 | /* | |
231 | * Disable DMA on host. | |
232 | */ | |
233 | wbsd_write_index(host, WBSD_IDX_DMA, 0); | |
234 | } | |
235 | ||
236 | host->mrq = NULL; | |
237 | ||
238 | /* | |
239 | * MMC layer might call back into the driver so first unlock. | |
240 | */ | |
241 | spin_unlock(&host->lock); | |
242 | mmc_request_done(host->mmc, mrq); | |
243 | spin_lock(&host->lock); | |
244 | } | |
245 | ||
246 | /* | |
247 | * Scatter/gather functions | |
248 | */ | |
249 | ||
250 | static inline void wbsd_init_sg(struct wbsd_host* host, struct mmc_data* data) | |
251 | { | |
252 | /* | |
253 | * Get info. about SG list from data structure. | |
254 | */ | |
255 | host->cur_sg = data->sg; | |
256 | host->num_sg = data->sg_len; | |
257 | ||
258 | host->offset = 0; | |
259 | host->remain = host->cur_sg->length; | |
260 | } | |
261 | ||
262 | static inline int wbsd_next_sg(struct wbsd_host* host) | |
263 | { | |
264 | /* | |
265 | * Skip to next SG entry. | |
266 | */ | |
267 | host->cur_sg++; | |
268 | host->num_sg--; | |
269 | ||
270 | /* | |
271 | * Any entries left? | |
272 | */ | |
273 | if (host->num_sg > 0) | |
274 | { | |
275 | host->offset = 0; | |
276 | host->remain = host->cur_sg->length; | |
277 | } | |
278 | ||
279 | return host->num_sg; | |
280 | } | |
281 | ||
282 | static inline char* wbsd_kmap_sg(struct wbsd_host* host) | |
283 | { | |
284 | host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ) + | |
285 | host->cur_sg->offset; | |
286 | return host->mapped_sg; | |
287 | } | |
288 | ||
289 | static inline void wbsd_kunmap_sg(struct wbsd_host* host) | |
290 | { | |
291 | kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ); | |
292 | } | |
293 | ||
294 | static inline void wbsd_sg_to_dma(struct wbsd_host* host, struct mmc_data* data) | |
295 | { | |
296 | unsigned int len, i, size; | |
297 | struct scatterlist* sg; | |
298 | char* dmabuf = host->dma_buffer; | |
299 | char* sgbuf; | |
300 | ||
301 | size = host->size; | |
302 | ||
303 | sg = data->sg; | |
304 | len = data->sg_len; | |
305 | ||
306 | /* | |
307 | * Just loop through all entries. Size might not | |
308 | * be the entire list though so make sure that | |
309 | * we do not transfer too much. | |
310 | */ | |
311 | for (i = 0;i < len;i++) | |
312 | { | |
313 | sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset; | |
314 | if (size < sg[i].length) | |
315 | memcpy(dmabuf, sgbuf, size); | |
316 | else | |
317 | memcpy(dmabuf, sgbuf, sg[i].length); | |
318 | kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); | |
319 | dmabuf += sg[i].length; | |
320 | ||
321 | if (size < sg[i].length) | |
322 | size = 0; | |
323 | else | |
324 | size -= sg[i].length; | |
325 | ||
326 | if (size == 0) | |
327 | break; | |
328 | } | |
329 | ||
330 | /* | |
331 | * Check that we didn't get a request to transfer | |
332 | * more data than can fit into the SG list. | |
333 | */ | |
334 | ||
335 | BUG_ON(size != 0); | |
336 | ||
337 | host->size -= size; | |
338 | } | |
339 | ||
340 | static inline void wbsd_dma_to_sg(struct wbsd_host* host, struct mmc_data* data) | |
341 | { | |
342 | unsigned int len, i, size; | |
343 | struct scatterlist* sg; | |
344 | char* dmabuf = host->dma_buffer; | |
345 | char* sgbuf; | |
346 | ||
347 | size = host->size; | |
348 | ||
349 | sg = data->sg; | |
350 | len = data->sg_len; | |
351 | ||
352 | /* | |
353 | * Just loop through all entries. Size might not | |
354 | * be the entire list though so make sure that | |
355 | * we do not transfer too much. | |
356 | */ | |
357 | for (i = 0;i < len;i++) | |
358 | { | |
359 | sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset; | |
360 | if (size < sg[i].length) | |
361 | memcpy(sgbuf, dmabuf, size); | |
362 | else | |
363 | memcpy(sgbuf, dmabuf, sg[i].length); | |
364 | kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); | |
365 | dmabuf += sg[i].length; | |
366 | ||
367 | if (size < sg[i].length) | |
368 | size = 0; | |
369 | else | |
370 | size -= sg[i].length; | |
371 | ||
372 | if (size == 0) | |
373 | break; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Check that we didn't get a request to transfer | |
378 | * more data than can fit into the SG list. | |
379 | */ | |
380 | ||
381 | BUG_ON(size != 0); | |
382 | ||
383 | host->size -= size; | |
384 | } | |
385 | ||
386 | /* | |
387 | * Command handling | |
388 | */ | |
389 | ||
390 | static inline void wbsd_get_short_reply(struct wbsd_host* host, | |
391 | struct mmc_command* cmd) | |
392 | { | |
393 | /* | |
394 | * Correct response type? | |
395 | */ | |
396 | if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) | |
397 | { | |
398 | cmd->error = MMC_ERR_INVALID; | |
399 | return; | |
400 | } | |
401 | ||
402 | cmd->resp[0] = | |
403 | wbsd_read_index(host, WBSD_IDX_RESP12) << 24; | |
404 | cmd->resp[0] |= | |
405 | wbsd_read_index(host, WBSD_IDX_RESP13) << 16; | |
406 | cmd->resp[0] |= | |
407 | wbsd_read_index(host, WBSD_IDX_RESP14) << 8; | |
408 | cmd->resp[0] |= | |
409 | wbsd_read_index(host, WBSD_IDX_RESP15) << 0; | |
410 | cmd->resp[1] = | |
411 | wbsd_read_index(host, WBSD_IDX_RESP16) << 24; | |
412 | } | |
413 | ||
414 | static inline void wbsd_get_long_reply(struct wbsd_host* host, | |
415 | struct mmc_command* cmd) | |
416 | { | |
417 | int i; | |
418 | ||
419 | /* | |
420 | * Correct response type? | |
421 | */ | |
422 | if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) | |
423 | { | |
424 | cmd->error = MMC_ERR_INVALID; | |
425 | return; | |
426 | } | |
427 | ||
428 | for (i = 0;i < 4;i++) | |
429 | { | |
430 | cmd->resp[i] = | |
431 | wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24; | |
432 | cmd->resp[i] |= | |
433 | wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16; | |
434 | cmd->resp[i] |= | |
435 | wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8; | |
436 | cmd->resp[i] |= | |
437 | wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0; | |
438 | } | |
439 | } | |
440 | ||
1da177e4 LT |
441 | static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd) |
442 | { | |
443 | int i; | |
444 | u8 status, isr; | |
445 | ||
446 | DBGF("Sending cmd (%x)\n", cmd->opcode); | |
447 | ||
448 | /* | |
449 | * Clear accumulated ISR. The interrupt routine | |
450 | * will fill this one with events that occur during | |
451 | * transfer. | |
452 | */ | |
453 | host->isr = 0; | |
454 | ||
455 | /* | |
456 | * Send the command (CRC calculated by host). | |
457 | */ | |
458 | outb(cmd->opcode, host->base + WBSD_CMDR); | |
459 | for (i = 3;i >= 0;i--) | |
460 | outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR); | |
461 | ||
462 | cmd->error = MMC_ERR_NONE; | |
463 | ||
464 | /* | |
465 | * Wait for the request to complete. | |
466 | */ | |
467 | do { | |
468 | status = wbsd_read_index(host, WBSD_IDX_STATUS); | |
469 | } while (status & WBSD_CARDTRAFFIC); | |
470 | ||
471 | /* | |
472 | * Do we expect a reply? | |
473 | */ | |
474 | if ((cmd->flags & MMC_RSP_MASK) != MMC_RSP_NONE) | |
475 | { | |
476 | /* | |
477 | * Read back status. | |
478 | */ | |
479 | isr = host->isr; | |
480 | ||
481 | /* Card removed? */ | |
482 | if (isr & WBSD_INT_CARD) | |
483 | cmd->error = MMC_ERR_TIMEOUT; | |
484 | /* Timeout? */ | |
485 | else if (isr & WBSD_INT_TIMEOUT) | |
486 | cmd->error = MMC_ERR_TIMEOUT; | |
487 | /* CRC? */ | |
488 | else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC)) | |
489 | cmd->error = MMC_ERR_BADCRC; | |
490 | /* All ok */ | |
491 | else | |
492 | { | |
493 | if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_SHORT) | |
494 | wbsd_get_short_reply(host, cmd); | |
495 | else | |
496 | wbsd_get_long_reply(host, cmd); | |
497 | } | |
498 | } | |
499 | ||
500 | DBGF("Sent cmd (%x), res %d\n", cmd->opcode, cmd->error); | |
501 | } | |
502 | ||
503 | /* | |
504 | * Data functions | |
505 | */ | |
506 | ||
507 | static void wbsd_empty_fifo(struct wbsd_host* host) | |
508 | { | |
509 | struct mmc_data* data = host->mrq->cmd->data; | |
510 | char* buffer; | |
511 | int i, fsr, fifo; | |
512 | ||
513 | /* | |
514 | * Handle excessive data. | |
515 | */ | |
516 | if (data->bytes_xfered == host->size) | |
517 | return; | |
518 | ||
519 | buffer = wbsd_kmap_sg(host) + host->offset; | |
520 | ||
521 | /* | |
522 | * Drain the fifo. This has a tendency to loop longer | |
523 | * than the FIFO length (usually one block). | |
524 | */ | |
525 | while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) | |
526 | { | |
527 | /* | |
528 | * The size field in the FSR is broken so we have to | |
529 | * do some guessing. | |
530 | */ | |
531 | if (fsr & WBSD_FIFO_FULL) | |
532 | fifo = 16; | |
533 | else if (fsr & WBSD_FIFO_FUTHRE) | |
534 | fifo = 8; | |
535 | else | |
536 | fifo = 1; | |
537 | ||
538 | for (i = 0;i < fifo;i++) | |
539 | { | |
540 | *buffer = inb(host->base + WBSD_DFR); | |
541 | buffer++; | |
542 | host->offset++; | |
543 | host->remain--; | |
544 | ||
545 | data->bytes_xfered++; | |
546 | ||
547 | /* | |
548 | * Transfer done? | |
549 | */ | |
550 | if (data->bytes_xfered == host->size) | |
551 | { | |
552 | wbsd_kunmap_sg(host); | |
553 | return; | |
554 | } | |
555 | ||
556 | /* | |
557 | * End of scatter list entry? | |
558 | */ | |
559 | if (host->remain == 0) | |
560 | { | |
561 | wbsd_kunmap_sg(host); | |
562 | ||
563 | /* | |
564 | * Get next entry. Check if last. | |
565 | */ | |
566 | if (!wbsd_next_sg(host)) | |
567 | { | |
568 | /* | |
569 | * We should never reach this point. | |
570 | * It means that we're trying to | |
571 | * transfer more blocks than can fit | |
572 | * into the scatter list. | |
573 | */ | |
574 | BUG_ON(1); | |
575 | ||
576 | host->size = data->bytes_xfered; | |
577 | ||
578 | return; | |
579 | } | |
580 | ||
581 | buffer = wbsd_kmap_sg(host); | |
582 | } | |
583 | } | |
584 | } | |
585 | ||
586 | wbsd_kunmap_sg(host); | |
587 | ||
588 | /* | |
589 | * This is a very dirty hack to solve a | |
590 | * hardware problem. The chip doesn't trigger | |
591 | * FIFO threshold interrupts properly. | |
592 | */ | |
593 | if ((host->size - data->bytes_xfered) < 16) | |
594 | tasklet_schedule(&host->fifo_tasklet); | |
595 | } | |
596 | ||
597 | static void wbsd_fill_fifo(struct wbsd_host* host) | |
598 | { | |
599 | struct mmc_data* data = host->mrq->cmd->data; | |
600 | char* buffer; | |
601 | int i, fsr, fifo; | |
602 | ||
603 | /* | |
604 | * Check that we aren't being called after the | |
605 | * entire buffer has been transfered. | |
606 | */ | |
607 | if (data->bytes_xfered == host->size) | |
608 | return; | |
609 | ||
610 | buffer = wbsd_kmap_sg(host) + host->offset; | |
611 | ||
612 | /* | |
613 | * Fill the fifo. This has a tendency to loop longer | |
614 | * than the FIFO length (usually one block). | |
615 | */ | |
616 | while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) | |
617 | { | |
618 | /* | |
619 | * The size field in the FSR is broken so we have to | |
620 | * do some guessing. | |
621 | */ | |
622 | if (fsr & WBSD_FIFO_EMPTY) | |
623 | fifo = 0; | |
624 | else if (fsr & WBSD_FIFO_EMTHRE) | |
625 | fifo = 8; | |
626 | else | |
627 | fifo = 15; | |
628 | ||
629 | for (i = 16;i > fifo;i--) | |
630 | { | |
631 | outb(*buffer, host->base + WBSD_DFR); | |
632 | buffer++; | |
633 | host->offset++; | |
634 | host->remain--; | |
635 | ||
636 | data->bytes_xfered++; | |
637 | ||
638 | /* | |
639 | * Transfer done? | |
640 | */ | |
641 | if (data->bytes_xfered == host->size) | |
642 | { | |
643 | wbsd_kunmap_sg(host); | |
644 | return; | |
645 | } | |
646 | ||
647 | /* | |
648 | * End of scatter list entry? | |
649 | */ | |
650 | if (host->remain == 0) | |
651 | { | |
652 | wbsd_kunmap_sg(host); | |
653 | ||
654 | /* | |
655 | * Get next entry. Check if last. | |
656 | */ | |
657 | if (!wbsd_next_sg(host)) | |
658 | { | |
659 | /* | |
660 | * We should never reach this point. | |
661 | * It means that we're trying to | |
662 | * transfer more blocks than can fit | |
663 | * into the scatter list. | |
664 | */ | |
665 | BUG_ON(1); | |
666 | ||
667 | host->size = data->bytes_xfered; | |
668 | ||
669 | return; | |
670 | } | |
671 | ||
672 | buffer = wbsd_kmap_sg(host); | |
673 | } | |
674 | } | |
675 | } | |
676 | ||
677 | wbsd_kunmap_sg(host); | |
85bcc130 PO |
678 | |
679 | /* | |
680 | * The controller stops sending interrupts for | |
681 | * 'FIFO empty' under certain conditions. So we | |
682 | * need to be a bit more pro-active. | |
683 | */ | |
684 | tasklet_schedule(&host->fifo_tasklet); | |
1da177e4 LT |
685 | } |
686 | ||
687 | static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) | |
688 | { | |
689 | u16 blksize; | |
690 | u8 setup; | |
691 | unsigned long dmaflags; | |
692 | ||
693 | DBGF("blksz %04x blks %04x flags %08x\n", | |
694 | 1 << data->blksz_bits, data->blocks, data->flags); | |
695 | DBGF("tsac %d ms nsac %d clk\n", | |
696 | data->timeout_ns / 1000000, data->timeout_clks); | |
697 | ||
698 | /* | |
699 | * Calculate size. | |
700 | */ | |
701 | host->size = data->blocks << data->blksz_bits; | |
702 | ||
703 | /* | |
704 | * Check timeout values for overflow. | |
705 | * (Yes, some cards cause this value to overflow). | |
706 | */ | |
707 | if (data->timeout_ns > 127000000) | |
708 | wbsd_write_index(host, WBSD_IDX_TAAC, 127); | |
709 | else | |
710 | wbsd_write_index(host, WBSD_IDX_TAAC, data->timeout_ns/1000000); | |
711 | ||
712 | if (data->timeout_clks > 255) | |
713 | wbsd_write_index(host, WBSD_IDX_NSAC, 255); | |
714 | else | |
715 | wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks); | |
716 | ||
717 | /* | |
718 | * Inform the chip of how large blocks will be | |
719 | * sent. It needs this to determine when to | |
720 | * calculate CRC. | |
721 | * | |
722 | * Space for CRC must be included in the size. | |
723 | */ | |
724 | blksize = (1 << data->blksz_bits) + 2; | |
725 | ||
726 | wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0); | |
727 | wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); | |
728 | ||
729 | /* | |
730 | * Clear the FIFO. This is needed even for DMA | |
731 | * transfers since the chip still uses the FIFO | |
732 | * internally. | |
733 | */ | |
734 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
735 | setup |= WBSD_FIFO_RESET; | |
736 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
737 | ||
738 | /* | |
739 | * DMA transfer? | |
740 | */ | |
741 | if (host->dma >= 0) | |
742 | { | |
743 | /* | |
744 | * The buffer for DMA is only 64 kB. | |
745 | */ | |
746 | BUG_ON(host->size > 0x10000); | |
747 | if (host->size > 0x10000) | |
748 | { | |
749 | data->error = MMC_ERR_INVALID; | |
750 | return; | |
751 | } | |
752 | ||
753 | /* | |
754 | * Transfer data from the SG list to | |
755 | * the DMA buffer. | |
756 | */ | |
757 | if (data->flags & MMC_DATA_WRITE) | |
758 | wbsd_sg_to_dma(host, data); | |
759 | ||
760 | /* | |
761 | * Initialise the ISA DMA controller. | |
762 | */ | |
763 | dmaflags = claim_dma_lock(); | |
764 | disable_dma(host->dma); | |
765 | clear_dma_ff(host->dma); | |
766 | if (data->flags & MMC_DATA_READ) | |
767 | set_dma_mode(host->dma, DMA_MODE_READ & ~0x40); | |
768 | else | |
769 | set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40); | |
770 | set_dma_addr(host->dma, host->dma_addr); | |
771 | set_dma_count(host->dma, host->size); | |
772 | ||
773 | enable_dma(host->dma); | |
774 | release_dma_lock(dmaflags); | |
775 | ||
776 | /* | |
777 | * Enable DMA on the host. | |
778 | */ | |
779 | wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE); | |
780 | } | |
781 | else | |
782 | { | |
783 | /* | |
784 | * This flag is used to keep printk | |
785 | * output to a minimum. | |
786 | */ | |
787 | host->firsterr = 1; | |
788 | ||
789 | /* | |
790 | * Initialise the SG list. | |
791 | */ | |
792 | wbsd_init_sg(host, data); | |
793 | ||
794 | /* | |
795 | * Turn off DMA. | |
796 | */ | |
797 | wbsd_write_index(host, WBSD_IDX_DMA, 0); | |
798 | ||
799 | /* | |
800 | * Set up FIFO threshold levels (and fill | |
801 | * buffer if doing a write). | |
802 | */ | |
803 | if (data->flags & MMC_DATA_READ) | |
804 | { | |
805 | wbsd_write_index(host, WBSD_IDX_FIFOEN, | |
806 | WBSD_FIFOEN_FULL | 8); | |
807 | } | |
808 | else | |
809 | { | |
810 | wbsd_write_index(host, WBSD_IDX_FIFOEN, | |
811 | WBSD_FIFOEN_EMPTY | 8); | |
812 | wbsd_fill_fifo(host); | |
813 | } | |
814 | } | |
815 | ||
816 | data->error = MMC_ERR_NONE; | |
817 | } | |
818 | ||
819 | static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) | |
820 | { | |
821 | unsigned long dmaflags; | |
822 | int count; | |
823 | u8 status; | |
824 | ||
825 | WARN_ON(host->mrq == NULL); | |
826 | ||
827 | /* | |
828 | * Send a stop command if needed. | |
829 | */ | |
830 | if (data->stop) | |
831 | wbsd_send_command(host, data->stop); | |
832 | ||
833 | /* | |
834 | * Wait for the controller to leave data | |
835 | * transfer state. | |
836 | */ | |
837 | do | |
838 | { | |
839 | status = wbsd_read_index(host, WBSD_IDX_STATUS); | |
840 | } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE)); | |
841 | ||
842 | /* | |
843 | * DMA transfer? | |
844 | */ | |
845 | if (host->dma >= 0) | |
846 | { | |
847 | /* | |
848 | * Disable DMA on the host. | |
849 | */ | |
850 | wbsd_write_index(host, WBSD_IDX_DMA, 0); | |
851 | ||
852 | /* | |
853 | * Turn of ISA DMA controller. | |
854 | */ | |
855 | dmaflags = claim_dma_lock(); | |
856 | disable_dma(host->dma); | |
857 | clear_dma_ff(host->dma); | |
858 | count = get_dma_residue(host->dma); | |
859 | release_dma_lock(dmaflags); | |
860 | ||
861 | /* | |
862 | * Any leftover data? | |
863 | */ | |
864 | if (count) | |
865 | { | |
866 | printk(KERN_ERR DRIVER_NAME ": Incomplete DMA " | |
867 | "transfer. %d bytes left.\n", count); | |
868 | ||
869 | data->error = MMC_ERR_FAILED; | |
870 | } | |
871 | else | |
872 | { | |
873 | /* | |
874 | * Transfer data from DMA buffer to | |
875 | * SG list. | |
876 | */ | |
877 | if (data->flags & MMC_DATA_READ) | |
878 | wbsd_dma_to_sg(host, data); | |
879 | ||
880 | data->bytes_xfered = host->size; | |
881 | } | |
882 | } | |
883 | ||
884 | DBGF("Ending data transfer (%d bytes)\n", data->bytes_xfered); | |
885 | ||
886 | wbsd_request_end(host, host->mrq); | |
887 | } | |
888 | ||
85bcc130 PO |
889 | /*****************************************************************************\ |
890 | * * | |
891 | * MMC layer callbacks * | |
892 | * * | |
893 | \*****************************************************************************/ | |
1da177e4 LT |
894 | |
895 | static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq) | |
896 | { | |
897 | struct wbsd_host* host = mmc_priv(mmc); | |
898 | struct mmc_command* cmd; | |
899 | ||
900 | /* | |
901 | * Disable tasklets to avoid a deadlock. | |
902 | */ | |
903 | spin_lock_bh(&host->lock); | |
904 | ||
905 | BUG_ON(host->mrq != NULL); | |
906 | ||
907 | cmd = mrq->cmd; | |
908 | ||
909 | host->mrq = mrq; | |
910 | ||
911 | /* | |
912 | * If there is no card in the slot then | |
913 | * timeout immediatly. | |
914 | */ | |
85bcc130 | 915 | if (!(host->flags & WBSD_FCARD_PRESENT)) |
1da177e4 LT |
916 | { |
917 | cmd->error = MMC_ERR_TIMEOUT; | |
918 | goto done; | |
919 | } | |
920 | ||
921 | /* | |
922 | * Does the request include data? | |
923 | */ | |
924 | if (cmd->data) | |
925 | { | |
926 | wbsd_prepare_data(host, cmd->data); | |
927 | ||
928 | if (cmd->data->error != MMC_ERR_NONE) | |
929 | goto done; | |
930 | } | |
931 | ||
932 | wbsd_send_command(host, cmd); | |
933 | ||
934 | /* | |
935 | * If this is a data transfer the request | |
936 | * will be finished after the data has | |
937 | * transfered. | |
938 | */ | |
939 | if (cmd->data && (cmd->error == MMC_ERR_NONE)) | |
940 | { | |
941 | /* | |
942 | * Dirty fix for hardware bug. | |
943 | */ | |
944 | if (host->dma == -1) | |
945 | tasklet_schedule(&host->fifo_tasklet); | |
946 | ||
947 | spin_unlock_bh(&host->lock); | |
948 | ||
949 | return; | |
950 | } | |
951 | ||
952 | done: | |
953 | wbsd_request_end(host, mrq); | |
954 | ||
955 | spin_unlock_bh(&host->lock); | |
956 | } | |
957 | ||
958 | static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) | |
959 | { | |
960 | struct wbsd_host* host = mmc_priv(mmc); | |
961 | u8 clk, setup, pwr; | |
962 | ||
963 | DBGF("clock %uHz busmode %u powermode %u Vdd %u\n", | |
964 | ios->clock, ios->bus_mode, ios->power_mode, ios->vdd); | |
965 | ||
966 | spin_lock_bh(&host->lock); | |
967 | ||
968 | /* | |
969 | * Reset the chip on each power off. | |
970 | * Should clear out any weird states. | |
971 | */ | |
972 | if (ios->power_mode == MMC_POWER_OFF) | |
973 | wbsd_init_device(host); | |
974 | ||
975 | if (ios->clock >= 24000000) | |
976 | clk = WBSD_CLK_24M; | |
977 | else if (ios->clock >= 16000000) | |
978 | clk = WBSD_CLK_16M; | |
979 | else if (ios->clock >= 12000000) | |
980 | clk = WBSD_CLK_12M; | |
981 | else | |
982 | clk = WBSD_CLK_375K; | |
983 | ||
984 | /* | |
985 | * Only write to the clock register when | |
986 | * there is an actual change. | |
987 | */ | |
988 | if (clk != host->clk) | |
989 | { | |
990 | wbsd_write_index(host, WBSD_IDX_CLK, clk); | |
991 | host->clk = clk; | |
992 | } | |
993 | ||
85bcc130 PO |
994 | /* |
995 | * Power up card. | |
996 | */ | |
1da177e4 LT |
997 | if (ios->power_mode != MMC_POWER_OFF) |
998 | { | |
1da177e4 LT |
999 | pwr = inb(host->base + WBSD_CSR); |
1000 | pwr &= ~WBSD_POWER_N; | |
1001 | outb(pwr, host->base + WBSD_CSR); | |
1da177e4 LT |
1002 | } |
1003 | ||
85bcc130 PO |
1004 | /* |
1005 | * MMC cards need to have pin 1 high during init. | |
1006 | * Init time corresponds rather nicely with the bus mode. | |
1007 | * It wreaks havoc with the card detection though so | |
1008 | * that needs to be disabed. | |
1009 | */ | |
1010 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
1011 | if ((ios->power_mode == MMC_POWER_ON) && | |
1012 | (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)) | |
1013 | { | |
1014 | setup |= WBSD_DAT3_H; | |
1015 | host->flags |= WBSD_FIGNORE_DETECT; | |
1016 | } | |
1017 | else | |
1018 | { | |
1019 | setup &= ~WBSD_DAT3_H; | |
1020 | host->flags &= ~WBSD_FIGNORE_DETECT; | |
1021 | } | |
1022 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
1023 | ||
1da177e4 LT |
1024 | spin_unlock_bh(&host->lock); |
1025 | } | |
1026 | ||
85bcc130 PO |
1027 | static struct mmc_host_ops wbsd_ops = { |
1028 | .request = wbsd_request, | |
1029 | .set_ios = wbsd_set_ios, | |
1030 | }; | |
1031 | ||
1032 | /*****************************************************************************\ | |
1033 | * * | |
1034 | * Interrupt handling * | |
1035 | * * | |
1036 | \*****************************************************************************/ | |
1037 | ||
6e6293dd PO |
1038 | /* |
1039 | * Helper function for card detection | |
1040 | */ | |
1041 | static void wbsd_detect_card(unsigned long data) | |
1042 | { | |
1043 | struct wbsd_host *host = (struct wbsd_host*)data; | |
1044 | ||
1045 | BUG_ON(host == NULL); | |
1046 | ||
1047 | DBG("Executing card detection\n"); | |
1048 | ||
1049 | mmc_detect_change(host->mmc); | |
1050 | } | |
1051 | ||
1da177e4 LT |
1052 | /* |
1053 | * Tasklets | |
1054 | */ | |
1055 | ||
77933d72 | 1056 | static inline struct mmc_data* wbsd_get_data(struct wbsd_host* host) |
1da177e4 LT |
1057 | { |
1058 | WARN_ON(!host->mrq); | |
1059 | if (!host->mrq) | |
1060 | return NULL; | |
1061 | ||
1062 | WARN_ON(!host->mrq->cmd); | |
1063 | if (!host->mrq->cmd) | |
1064 | return NULL; | |
1065 | ||
1066 | WARN_ON(!host->mrq->cmd->data); | |
1067 | if (!host->mrq->cmd->data) | |
1068 | return NULL; | |
1069 | ||
1070 | return host->mrq->cmd->data; | |
1071 | } | |
1072 | ||
1073 | static void wbsd_tasklet_card(unsigned long param) | |
1074 | { | |
1075 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1076 | u8 csr; | |
1077 | ||
1078 | spin_lock(&host->lock); | |
1079 | ||
85bcc130 PO |
1080 | if (host->flags & WBSD_FIGNORE_DETECT) |
1081 | { | |
1082 | spin_unlock(&host->lock); | |
1083 | return; | |
1084 | } | |
1085 | ||
1da177e4 LT |
1086 | csr = inb(host->base + WBSD_CSR); |
1087 | WARN_ON(csr == 0xff); | |
1088 | ||
1089 | if (csr & WBSD_CARDPRESENT) | |
85bcc130 PO |
1090 | { |
1091 | if (!(host->flags & WBSD_FCARD_PRESENT)) | |
1092 | { | |
1093 | DBG("Card inserted\n"); | |
1094 | host->flags |= WBSD_FCARD_PRESENT; | |
6e6293dd PO |
1095 | |
1096 | /* | |
1097 | * Delay card detection to allow electrical connections | |
1098 | * to stabilise. | |
1099 | */ | |
1100 | mod_timer(&host->timer, jiffies + HZ/2); | |
85bcc130 | 1101 | } |
6e6293dd PO |
1102 | |
1103 | spin_unlock(&host->lock); | |
85bcc130 PO |
1104 | } |
1105 | else if (host->flags & WBSD_FCARD_PRESENT) | |
1da177e4 LT |
1106 | { |
1107 | DBG("Card removed\n"); | |
85bcc130 | 1108 | host->flags &= ~WBSD_FCARD_PRESENT; |
1da177e4 LT |
1109 | |
1110 | if (host->mrq) | |
1111 | { | |
1112 | printk(KERN_ERR DRIVER_NAME | |
1113 | ": Card removed during transfer!\n"); | |
1114 | wbsd_reset(host); | |
1115 | ||
1116 | host->mrq->cmd->error = MMC_ERR_FAILED; | |
1117 | tasklet_schedule(&host->finish_tasklet); | |
1118 | } | |
6e6293dd PO |
1119 | |
1120 | /* | |
1121 | * Unlock first since we might get a call back. | |
1122 | */ | |
1123 | spin_unlock(&host->lock); | |
1da177e4 | 1124 | |
85bcc130 | 1125 | mmc_detect_change(host->mmc); |
6e6293dd | 1126 | } |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | static void wbsd_tasklet_fifo(unsigned long param) | |
1130 | { | |
1131 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1132 | struct mmc_data* data; | |
1133 | ||
1134 | spin_lock(&host->lock); | |
1135 | ||
1136 | if (!host->mrq) | |
1137 | goto end; | |
1138 | ||
1139 | data = wbsd_get_data(host); | |
1140 | if (!data) | |
1141 | goto end; | |
1142 | ||
1143 | if (data->flags & MMC_DATA_WRITE) | |
1144 | wbsd_fill_fifo(host); | |
1145 | else | |
1146 | wbsd_empty_fifo(host); | |
1147 | ||
1148 | /* | |
1149 | * Done? | |
1150 | */ | |
1151 | if (host->size == data->bytes_xfered) | |
1152 | { | |
1153 | wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); | |
1154 | tasklet_schedule(&host->finish_tasklet); | |
1155 | } | |
1156 | ||
1157 | end: | |
1158 | spin_unlock(&host->lock); | |
1159 | } | |
1160 | ||
1161 | static void wbsd_tasklet_crc(unsigned long param) | |
1162 | { | |
1163 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1164 | struct mmc_data* data; | |
1165 | ||
1166 | spin_lock(&host->lock); | |
1167 | ||
1168 | if (!host->mrq) | |
1169 | goto end; | |
1170 | ||
1171 | data = wbsd_get_data(host); | |
1172 | if (!data) | |
1173 | goto end; | |
1174 | ||
1175 | DBGF("CRC error\n"); | |
1176 | ||
1177 | data->error = MMC_ERR_BADCRC; | |
1178 | ||
1179 | tasklet_schedule(&host->finish_tasklet); | |
1180 | ||
1181 | end: | |
1182 | spin_unlock(&host->lock); | |
1183 | } | |
1184 | ||
1185 | static void wbsd_tasklet_timeout(unsigned long param) | |
1186 | { | |
1187 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1188 | struct mmc_data* data; | |
1189 | ||
1190 | spin_lock(&host->lock); | |
1191 | ||
1192 | if (!host->mrq) | |
1193 | goto end; | |
1194 | ||
1195 | data = wbsd_get_data(host); | |
1196 | if (!data) | |
1197 | goto end; | |
1198 | ||
1199 | DBGF("Timeout\n"); | |
1200 | ||
1201 | data->error = MMC_ERR_TIMEOUT; | |
1202 | ||
1203 | tasklet_schedule(&host->finish_tasklet); | |
1204 | ||
1205 | end: | |
1206 | spin_unlock(&host->lock); | |
1207 | } | |
1208 | ||
1209 | static void wbsd_tasklet_finish(unsigned long param) | |
1210 | { | |
1211 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1212 | struct mmc_data* data; | |
1213 | ||
1214 | spin_lock(&host->lock); | |
1215 | ||
1216 | WARN_ON(!host->mrq); | |
1217 | if (!host->mrq) | |
1218 | goto end; | |
1219 | ||
1220 | data = wbsd_get_data(host); | |
1221 | if (!data) | |
1222 | goto end; | |
1223 | ||
1224 | wbsd_finish_data(host, data); | |
1225 | ||
1226 | end: | |
1227 | spin_unlock(&host->lock); | |
1228 | } | |
1229 | ||
1230 | static void wbsd_tasklet_block(unsigned long param) | |
1231 | { | |
1232 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1233 | struct mmc_data* data; | |
1234 | ||
1235 | spin_lock(&host->lock); | |
1236 | ||
1237 | if ((wbsd_read_index(host, WBSD_IDX_CRCSTATUS) & WBSD_CRC_MASK) != | |
1238 | WBSD_CRC_OK) | |
1239 | { | |
1240 | data = wbsd_get_data(host); | |
1241 | if (!data) | |
1242 | goto end; | |
1243 | ||
1244 | DBGF("CRC error\n"); | |
1245 | ||
1246 | data->error = MMC_ERR_BADCRC; | |
1247 | ||
1248 | tasklet_schedule(&host->finish_tasklet); | |
1249 | } | |
1250 | ||
1251 | end: | |
1252 | spin_unlock(&host->lock); | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * Interrupt handling | |
1257 | */ | |
1258 | ||
1259 | static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs) | |
1260 | { | |
1261 | struct wbsd_host* host = dev_id; | |
1262 | int isr; | |
1263 | ||
1264 | isr = inb(host->base + WBSD_ISR); | |
1265 | ||
1266 | /* | |
1267 | * Was it actually our hardware that caused the interrupt? | |
1268 | */ | |
1269 | if (isr == 0xff || isr == 0x00) | |
1270 | return IRQ_NONE; | |
1271 | ||
1272 | host->isr |= isr; | |
1273 | ||
1274 | /* | |
1275 | * Schedule tasklets as needed. | |
1276 | */ | |
1277 | if (isr & WBSD_INT_CARD) | |
1278 | tasklet_schedule(&host->card_tasklet); | |
1279 | if (isr & WBSD_INT_FIFO_THRE) | |
1280 | tasklet_schedule(&host->fifo_tasklet); | |
1281 | if (isr & WBSD_INT_CRC) | |
1282 | tasklet_hi_schedule(&host->crc_tasklet); | |
1283 | if (isr & WBSD_INT_TIMEOUT) | |
1284 | tasklet_hi_schedule(&host->timeout_tasklet); | |
1285 | if (isr & WBSD_INT_BUSYEND) | |
1286 | tasklet_hi_schedule(&host->block_tasklet); | |
1287 | if (isr & WBSD_INT_TC) | |
1288 | tasklet_schedule(&host->finish_tasklet); | |
1289 | ||
1290 | return IRQ_HANDLED; | |
1291 | } | |
1292 | ||
85bcc130 PO |
1293 | /*****************************************************************************\ |
1294 | * * | |
1295 | * Device initialisation and shutdown * | |
1296 | * * | |
1297 | \*****************************************************************************/ | |
1298 | ||
1da177e4 | 1299 | /* |
85bcc130 | 1300 | * Allocate/free MMC structure. |
1da177e4 LT |
1301 | */ |
1302 | ||
85bcc130 PO |
1303 | static int __devinit wbsd_alloc_mmc(struct device* dev) |
1304 | { | |
1305 | struct mmc_host* mmc; | |
1306 | struct wbsd_host* host; | |
1307 | ||
1308 | /* | |
1309 | * Allocate MMC structure. | |
1310 | */ | |
1311 | mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev); | |
1312 | if (!mmc) | |
1313 | return -ENOMEM; | |
1314 | ||
1315 | host = mmc_priv(mmc); | |
1316 | host->mmc = mmc; | |
1317 | ||
1318 | host->dma = -1; | |
1319 | ||
1320 | /* | |
1321 | * Set host parameters. | |
1322 | */ | |
1323 | mmc->ops = &wbsd_ops; | |
1324 | mmc->f_min = 375000; | |
1325 | mmc->f_max = 24000000; | |
1326 | mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34; | |
1327 | ||
1328 | spin_lock_init(&host->lock); | |
1329 | ||
6e6293dd PO |
1330 | /* |
1331 | * Set up detection timer | |
1332 | */ | |
1333 | init_timer(&host->timer); | |
1334 | host->timer.data = (unsigned long)host; | |
1335 | host->timer.function = wbsd_detect_card; | |
1336 | ||
85bcc130 PO |
1337 | /* |
1338 | * Maximum number of segments. Worst case is one sector per segment | |
1339 | * so this will be 64kB/512. | |
1340 | */ | |
1341 | mmc->max_hw_segs = 128; | |
1342 | mmc->max_phys_segs = 128; | |
1343 | ||
1344 | /* | |
1345 | * Maximum number of sectors in one transfer. Also limited by 64kB | |
1346 | * buffer. | |
1347 | */ | |
1348 | mmc->max_sectors = 128; | |
1349 | ||
1350 | /* | |
1351 | * Maximum segment size. Could be one segment with the maximum number | |
1352 | * of segments. | |
1353 | */ | |
1354 | mmc->max_seg_size = mmc->max_sectors * 512; | |
1355 | ||
1356 | dev_set_drvdata(dev, mmc); | |
1357 | ||
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static void __devexit wbsd_free_mmc(struct device* dev) | |
1362 | { | |
1363 | struct mmc_host* mmc; | |
6e6293dd | 1364 | struct wbsd_host* host; |
85bcc130 PO |
1365 | |
1366 | mmc = dev_get_drvdata(dev); | |
1367 | if (!mmc) | |
1368 | return; | |
1369 | ||
6e6293dd PO |
1370 | host = mmc_priv(mmc); |
1371 | BUG_ON(host == NULL); | |
1372 | ||
1373 | del_timer_sync(&host->timer); | |
1374 | ||
85bcc130 PO |
1375 | mmc_free_host(mmc); |
1376 | ||
1377 | dev_set_drvdata(dev, NULL); | |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | * Scan for known chip id:s | |
1382 | */ | |
1383 | ||
1384 | static int __devinit wbsd_scan(struct wbsd_host* host) | |
1da177e4 LT |
1385 | { |
1386 | int i, j, k; | |
1387 | int id; | |
1388 | ||
1389 | /* | |
1390 | * Iterate through all ports, all codes to | |
1391 | * find hardware that is in our known list. | |
1392 | */ | |
1393 | for (i = 0;i < sizeof(config_ports)/sizeof(int);i++) | |
1394 | { | |
1395 | if (!request_region(config_ports[i], 2, DRIVER_NAME)) | |
1396 | continue; | |
1397 | ||
1398 | for (j = 0;j < sizeof(unlock_codes)/sizeof(int);j++) | |
1399 | { | |
1400 | id = 0xFFFF; | |
1401 | ||
1402 | outb(unlock_codes[j], config_ports[i]); | |
1403 | outb(unlock_codes[j], config_ports[i]); | |
1404 | ||
1405 | outb(WBSD_CONF_ID_HI, config_ports[i]); | |
1406 | id = inb(config_ports[i] + 1) << 8; | |
1407 | ||
1408 | outb(WBSD_CONF_ID_LO, config_ports[i]); | |
1409 | id |= inb(config_ports[i] + 1); | |
1410 | ||
1411 | for (k = 0;k < sizeof(valid_ids)/sizeof(int);k++) | |
1412 | { | |
1413 | if (id == valid_ids[k]) | |
1414 | { | |
1415 | host->chip_id = id; | |
1416 | host->config = config_ports[i]; | |
1417 | host->unlock_code = unlock_codes[i]; | |
1418 | ||
1419 | return 0; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | if (id != 0xFFFF) | |
1424 | { | |
1425 | DBG("Unknown hardware (id %x) found at %x\n", | |
1426 | id, config_ports[i]); | |
1427 | } | |
1428 | ||
1429 | outb(LOCK_CODE, config_ports[i]); | |
1430 | } | |
1431 | ||
1432 | release_region(config_ports[i], 2); | |
1433 | } | |
1434 | ||
1435 | return -ENODEV; | |
1436 | } | |
1437 | ||
85bcc130 PO |
1438 | /* |
1439 | * Allocate/free io port ranges | |
1440 | */ | |
1441 | ||
1442 | static int __devinit wbsd_request_region(struct wbsd_host* host, int base) | |
1da177e4 LT |
1443 | { |
1444 | if (io & 0x7) | |
1445 | return -EINVAL; | |
1446 | ||
85bcc130 | 1447 | if (!request_region(base, 8, DRIVER_NAME)) |
1da177e4 LT |
1448 | return -EIO; |
1449 | ||
1450 | host->base = io; | |
1451 | ||
1452 | return 0; | |
1453 | } | |
1454 | ||
85bcc130 | 1455 | static void __devexit wbsd_release_regions(struct wbsd_host* host) |
1da177e4 LT |
1456 | { |
1457 | if (host->base) | |
1458 | release_region(host->base, 8); | |
85bcc130 PO |
1459 | |
1460 | host->base = 0; | |
1da177e4 LT |
1461 | |
1462 | if (host->config) | |
1463 | release_region(host->config, 2); | |
85bcc130 PO |
1464 | |
1465 | host->config = 0; | |
1da177e4 LT |
1466 | } |
1467 | ||
85bcc130 PO |
1468 | /* |
1469 | * Allocate/free DMA port and buffer | |
1470 | */ | |
1471 | ||
1472 | static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma) | |
1da177e4 | 1473 | { |
1da177e4 LT |
1474 | if (dma < 0) |
1475 | return; | |
1476 | ||
1477 | if (request_dma(dma, DRIVER_NAME)) | |
1478 | goto err; | |
1479 | ||
1480 | /* | |
1481 | * We need to allocate a special buffer in | |
1482 | * order for ISA to be able to DMA to it. | |
1483 | */ | |
85bcc130 | 1484 | host->dma_buffer = kmalloc(WBSD_DMA_SIZE, |
1da177e4 LT |
1485 | GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN); |
1486 | if (!host->dma_buffer) | |
1487 | goto free; | |
1488 | ||
1489 | /* | |
1490 | * Translate the address to a physical address. | |
1491 | */ | |
85bcc130 PO |
1492 | host->dma_addr = dma_map_single(host->mmc->dev, host->dma_buffer, |
1493 | WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); | |
1da177e4 LT |
1494 | |
1495 | /* | |
1496 | * ISA DMA must be aligned on a 64k basis. | |
1497 | */ | |
1498 | if ((host->dma_addr & 0xffff) != 0) | |
1499 | goto kfree; | |
1500 | /* | |
1501 | * ISA cannot access memory above 16 MB. | |
1502 | */ | |
1503 | else if (host->dma_addr >= 0x1000000) | |
1504 | goto kfree; | |
1505 | ||
1506 | host->dma = dma; | |
1507 | ||
1508 | return; | |
1509 | ||
1510 | kfree: | |
1511 | /* | |
1512 | * If we've gotten here then there is some kind of alignment bug | |
1513 | */ | |
1514 | BUG_ON(1); | |
1515 | ||
85bcc130 PO |
1516 | dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE, |
1517 | DMA_BIDIRECTIONAL); | |
1518 | host->dma_addr = (dma_addr_t)NULL; | |
1519 | ||
1da177e4 LT |
1520 | kfree(host->dma_buffer); |
1521 | host->dma_buffer = NULL; | |
1522 | ||
1523 | free: | |
1524 | free_dma(dma); | |
1525 | ||
1526 | err: | |
1527 | printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. " | |
1528 | "Falling back on FIFO.\n", dma); | |
1529 | } | |
1530 | ||
85bcc130 PO |
1531 | static void __devexit wbsd_release_dma(struct wbsd_host* host) |
1532 | { | |
1533 | if (host->dma_addr) | |
1534 | dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE, | |
1535 | DMA_BIDIRECTIONAL); | |
1536 | if (host->dma_buffer) | |
1537 | kfree(host->dma_buffer); | |
1538 | if (host->dma >= 0) | |
1539 | free_dma(host->dma); | |
1540 | ||
1541 | host->dma = -1; | |
1542 | host->dma_buffer = NULL; | |
1543 | host->dma_addr = (dma_addr_t)NULL; | |
1544 | } | |
1da177e4 LT |
1545 | |
1546 | /* | |
85bcc130 | 1547 | * Allocate/free IRQ. |
1da177e4 LT |
1548 | */ |
1549 | ||
85bcc130 | 1550 | static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq) |
1da177e4 | 1551 | { |
1da177e4 LT |
1552 | int ret; |
1553 | ||
1554 | /* | |
85bcc130 | 1555 | * Allocate interrupt. |
1da177e4 | 1556 | */ |
85bcc130 PO |
1557 | |
1558 | ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host); | |
1559 | if (ret) | |
1560 | return ret; | |
1da177e4 | 1561 | |
85bcc130 PO |
1562 | host->irq = irq; |
1563 | ||
1da177e4 | 1564 | /* |
85bcc130 | 1565 | * Set up tasklets. |
1da177e4 | 1566 | */ |
85bcc130 PO |
1567 | tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host); |
1568 | tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, (unsigned long)host); | |
1569 | tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, (unsigned long)host); | |
1570 | tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host); | |
1571 | tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host); | |
1572 | tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host); | |
1573 | ||
1574 | return 0; | |
1575 | } | |
1da177e4 | 1576 | |
85bcc130 PO |
1577 | static void __devexit wbsd_release_irq(struct wbsd_host* host) |
1578 | { | |
1579 | if (!host->irq) | |
1580 | return; | |
1da177e4 | 1581 | |
85bcc130 PO |
1582 | free_irq(host->irq, host); |
1583 | ||
1584 | host->irq = 0; | |
1585 | ||
1586 | tasklet_kill(&host->card_tasklet); | |
1587 | tasklet_kill(&host->fifo_tasklet); | |
1588 | tasklet_kill(&host->crc_tasklet); | |
1589 | tasklet_kill(&host->timeout_tasklet); | |
1590 | tasklet_kill(&host->finish_tasklet); | |
1591 | tasklet_kill(&host->block_tasklet); | |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Allocate all resources for the host. | |
1596 | */ | |
1597 | ||
1598 | static int __devinit wbsd_request_resources(struct wbsd_host* host, | |
1599 | int base, int irq, int dma) | |
1600 | { | |
1601 | int ret; | |
1602 | ||
1da177e4 LT |
1603 | /* |
1604 | * Allocate I/O ports. | |
1605 | */ | |
85bcc130 | 1606 | ret = wbsd_request_region(host, base); |
1da177e4 | 1607 | if (ret) |
85bcc130 | 1608 | return ret; |
1da177e4 LT |
1609 | |
1610 | /* | |
85bcc130 | 1611 | * Allocate interrupt. |
1da177e4 | 1612 | */ |
85bcc130 PO |
1613 | ret = wbsd_request_irq(host, irq); |
1614 | if (ret) | |
1615 | return ret; | |
1616 | ||
1617 | /* | |
1618 | * Allocate DMA. | |
1619 | */ | |
1620 | wbsd_request_dma(host, dma); | |
1da177e4 | 1621 | |
85bcc130 PO |
1622 | return 0; |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * Release all resources for the host. | |
1627 | */ | |
1628 | ||
1629 | static void __devexit wbsd_release_resources(struct wbsd_host* host) | |
1630 | { | |
1631 | wbsd_release_dma(host); | |
1632 | wbsd_release_irq(host); | |
1633 | wbsd_release_regions(host); | |
1634 | } | |
1635 | ||
1636 | /* | |
1637 | * Configure the resources the chip should use. | |
1638 | */ | |
1639 | ||
1640 | static void __devinit wbsd_chip_config(struct wbsd_host* host) | |
1641 | { | |
1642 | /* | |
1643 | * Reset the chip. | |
1644 | */ | |
1645 | wbsd_write_config(host, WBSD_CONF_SWRST, 1); | |
1646 | wbsd_write_config(host, WBSD_CONF_SWRST, 0); | |
1da177e4 LT |
1647 | |
1648 | /* | |
1649 | * Select SD/MMC function. | |
1650 | */ | |
1651 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); | |
1652 | ||
1653 | /* | |
1654 | * Set up card detection. | |
1655 | */ | |
85bcc130 | 1656 | wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11); |
1da177e4 LT |
1657 | |
1658 | /* | |
85bcc130 | 1659 | * Configure chip |
1da177e4 LT |
1660 | */ |
1661 | wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8); | |
1662 | wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff); | |
1da177e4 | 1663 | |
85bcc130 | 1664 | wbsd_write_config(host, WBSD_CONF_IRQ, host->irq); |
1da177e4 | 1665 | |
85bcc130 PO |
1666 | if (host->dma >= 0) |
1667 | wbsd_write_config(host, WBSD_CONF_DRQ, host->dma); | |
1da177e4 LT |
1668 | |
1669 | /* | |
85bcc130 | 1670 | * Enable and power up chip. |
1da177e4 | 1671 | */ |
85bcc130 PO |
1672 | wbsd_write_config(host, WBSD_CONF_ENABLE, 1); |
1673 | wbsd_write_config(host, WBSD_CONF_POWER, 0x20); | |
1674 | } | |
1675 | ||
1676 | /* | |
1677 | * Check that configured resources are correct. | |
1678 | */ | |
1679 | ||
1680 | static int __devinit wbsd_chip_validate(struct wbsd_host* host) | |
1681 | { | |
1682 | int base, irq, dma; | |
1da177e4 LT |
1683 | |
1684 | /* | |
85bcc130 | 1685 | * Select SD/MMC function. |
1da177e4 | 1686 | */ |
85bcc130 | 1687 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); |
1da177e4 LT |
1688 | |
1689 | /* | |
85bcc130 | 1690 | * Read configuration. |
1da177e4 | 1691 | */ |
85bcc130 PO |
1692 | base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8; |
1693 | base |= wbsd_read_config(host, WBSD_CONF_PORT_LO); | |
1da177e4 | 1694 | |
85bcc130 PO |
1695 | irq = wbsd_read_config(host, WBSD_CONF_IRQ); |
1696 | ||
1697 | dma = wbsd_read_config(host, WBSD_CONF_DRQ); | |
1da177e4 LT |
1698 | |
1699 | /* | |
85bcc130 | 1700 | * Validate against given configuration. |
1da177e4 | 1701 | */ |
85bcc130 PO |
1702 | if (base != host->base) |
1703 | return 0; | |
1704 | if (irq != host->irq) | |
1705 | return 0; | |
1706 | if ((dma != host->dma) && (host->dma != -1)) | |
1707 | return 0; | |
1708 | ||
1709 | return 1; | |
1710 | } | |
1711 | ||
1712 | /*****************************************************************************\ | |
1713 | * * | |
1714 | * Devices setup and shutdown * | |
1715 | * * | |
1716 | \*****************************************************************************/ | |
1717 | ||
1718 | static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, | |
1719 | int pnp) | |
1720 | { | |
1721 | struct wbsd_host* host = NULL; | |
1722 | struct mmc_host* mmc = NULL; | |
1723 | int ret; | |
1724 | ||
1725 | ret = wbsd_alloc_mmc(dev); | |
1726 | if (ret) | |
1727 | return ret; | |
1728 | ||
1729 | mmc = dev_get_drvdata(dev); | |
1730 | host = mmc_priv(mmc); | |
1da177e4 LT |
1731 | |
1732 | /* | |
85bcc130 | 1733 | * Scan for hardware. |
1da177e4 | 1734 | */ |
85bcc130 PO |
1735 | ret = wbsd_scan(host); |
1736 | if (ret) | |
1737 | { | |
1738 | if (pnp && (ret == -ENODEV)) | |
1739 | { | |
1740 | printk(KERN_WARNING DRIVER_NAME | |
1741 | ": Unable to confirm device presence. You may " | |
1742 | "experience lock-ups.\n"); | |
1743 | } | |
1744 | else | |
1745 | { | |
1746 | wbsd_free_mmc(dev); | |
1747 | return ret; | |
1748 | } | |
1749 | } | |
1da177e4 LT |
1750 | |
1751 | /* | |
85bcc130 | 1752 | * Request resources. |
1da177e4 | 1753 | */ |
85bcc130 PO |
1754 | ret = wbsd_request_resources(host, io, irq, dma); |
1755 | if (ret) | |
1756 | { | |
1757 | wbsd_release_resources(host); | |
1758 | wbsd_free_mmc(dev); | |
1759 | return ret; | |
1760 | } | |
1da177e4 LT |
1761 | |
1762 | /* | |
85bcc130 | 1763 | * See if chip needs to be configured. |
1da177e4 | 1764 | */ |
85bcc130 PO |
1765 | if (pnp && (host->config != 0)) |
1766 | { | |
1767 | if (!wbsd_chip_validate(host)) | |
1768 | { | |
1769 | printk(KERN_WARNING DRIVER_NAME | |
1770 | ": PnP active but chip not configured! " | |
1771 | "You probably have a buggy BIOS. " | |
1772 | "Configuring chip manually.\n"); | |
1773 | wbsd_chip_config(host); | |
1774 | } | |
1775 | } | |
1776 | else | |
1777 | wbsd_chip_config(host); | |
1da177e4 LT |
1778 | |
1779 | /* | |
1780 | * Power Management stuff. No idea how this works. | |
1781 | * Not tested. | |
1782 | */ | |
1783 | #ifdef CONFIG_PM | |
85bcc130 PO |
1784 | if (host->config) |
1785 | wbsd_write_config(host, WBSD_CONF_PME, 0xA0); | |
1da177e4 | 1786 | #endif |
85bcc130 PO |
1787 | /* |
1788 | * Allow device to initialise itself properly. | |
1789 | */ | |
1790 | mdelay(5); | |
1da177e4 LT |
1791 | |
1792 | /* | |
1793 | * Reset the chip into a known state. | |
1794 | */ | |
1795 | wbsd_init_device(host); | |
1796 | ||
1da177e4 LT |
1797 | mmc_add_host(mmc); |
1798 | ||
85bcc130 PO |
1799 | printk(KERN_INFO "%s: W83L51xD", mmc->host_name); |
1800 | if (host->chip_id != 0) | |
1801 | printk(" id %x", (int)host->chip_id); | |
1802 | printk(" at 0x%x irq %d", (int)host->base, (int)host->irq); | |
1803 | if (host->dma >= 0) | |
1804 | printk(" dma %d", (int)host->dma); | |
1805 | else | |
1806 | printk(" FIFO"); | |
1807 | if (pnp) | |
1808 | printk(" PnP"); | |
1809 | printk("\n"); | |
1da177e4 LT |
1810 | |
1811 | return 0; | |
1da177e4 LT |
1812 | } |
1813 | ||
85bcc130 | 1814 | static void __devexit wbsd_shutdown(struct device* dev, int pnp) |
1da177e4 LT |
1815 | { |
1816 | struct mmc_host* mmc = dev_get_drvdata(dev); | |
1817 | struct wbsd_host* host; | |
1818 | ||
1819 | if (!mmc) | |
85bcc130 | 1820 | return; |
1da177e4 LT |
1821 | |
1822 | host = mmc_priv(mmc); | |
1823 | ||
1da177e4 LT |
1824 | mmc_remove_host(mmc); |
1825 | ||
85bcc130 PO |
1826 | if (!pnp) |
1827 | { | |
1828 | /* | |
1829 | * Power down the SD/MMC function. | |
1830 | */ | |
1831 | wbsd_unlock_config(host); | |
1832 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); | |
1833 | wbsd_write_config(host, WBSD_CONF_ENABLE, 0); | |
1834 | wbsd_lock_config(host); | |
1835 | } | |
1da177e4 | 1836 | |
85bcc130 | 1837 | wbsd_release_resources(host); |
1da177e4 | 1838 | |
85bcc130 PO |
1839 | wbsd_free_mmc(dev); |
1840 | } | |
1da177e4 | 1841 | |
85bcc130 PO |
1842 | /* |
1843 | * Non-PnP | |
1844 | */ | |
1845 | ||
1846 | static int __devinit wbsd_probe(struct device* dev) | |
1847 | { | |
1848 | return wbsd_init(dev, io, irq, dma, 0); | |
1849 | } | |
1850 | ||
1851 | static int __devexit wbsd_remove(struct device* dev) | |
1852 | { | |
1853 | wbsd_shutdown(dev, 0); | |
1854 | ||
1855 | return 0; | |
1856 | } | |
1857 | ||
1858 | /* | |
1859 | * PnP | |
1860 | */ | |
1861 | ||
1862 | #ifdef CONFIG_PNP | |
1863 | ||
1864 | static int __devinit | |
1865 | wbsd_pnp_probe(struct pnp_dev * pnpdev, const struct pnp_device_id *dev_id) | |
1866 | { | |
1867 | int io, irq, dma; | |
1da177e4 | 1868 | |
85bcc130 PO |
1869 | /* |
1870 | * Get resources from PnP layer. | |
1871 | */ | |
1872 | io = pnp_port_start(pnpdev, 0); | |
1873 | irq = pnp_irq(pnpdev, 0); | |
1874 | if (pnp_dma_valid(pnpdev, 0)) | |
1875 | dma = pnp_dma(pnpdev, 0); | |
1876 | else | |
1877 | dma = -1; | |
1da177e4 | 1878 | |
85bcc130 | 1879 | DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma); |
1da177e4 | 1880 | |
85bcc130 PO |
1881 | return wbsd_init(&pnpdev->dev, io, irq, dma, 1); |
1882 | } | |
1da177e4 | 1883 | |
85bcc130 PO |
1884 | static void __devexit wbsd_pnp_remove(struct pnp_dev * dev) |
1885 | { | |
1886 | wbsd_shutdown(&dev->dev, 1); | |
1da177e4 LT |
1887 | } |
1888 | ||
85bcc130 PO |
1889 | #endif /* CONFIG_PNP */ |
1890 | ||
1da177e4 LT |
1891 | /* |
1892 | * Power management | |
1893 | */ | |
1894 | ||
1895 | #ifdef CONFIG_PM | |
e5378ca8 | 1896 | static int wbsd_suspend(struct device *dev, pm_message_t state, u32 level) |
1da177e4 LT |
1897 | { |
1898 | DBGF("Not yet supported\n"); | |
1899 | ||
1900 | return 0; | |
1901 | } | |
1902 | ||
1903 | static int wbsd_resume(struct device *dev, u32 level) | |
1904 | { | |
1905 | DBGF("Not yet supported\n"); | |
1906 | ||
1907 | return 0; | |
1908 | } | |
1909 | #else | |
1910 | #define wbsd_suspend NULL | |
1911 | #define wbsd_resume NULL | |
1912 | #endif | |
1913 | ||
85bcc130 | 1914 | static struct platform_device *wbsd_device; |
1da177e4 LT |
1915 | |
1916 | static struct device_driver wbsd_driver = { | |
1917 | .name = DRIVER_NAME, | |
1918 | .bus = &platform_bus_type, | |
1919 | .probe = wbsd_probe, | |
1920 | .remove = wbsd_remove, | |
1921 | ||
1922 | .suspend = wbsd_suspend, | |
1923 | .resume = wbsd_resume, | |
1924 | }; | |
1925 | ||
85bcc130 PO |
1926 | #ifdef CONFIG_PNP |
1927 | ||
1928 | static struct pnp_driver wbsd_pnp_driver = { | |
1929 | .name = DRIVER_NAME, | |
1930 | .id_table = pnp_dev_table, | |
1931 | .probe = wbsd_pnp_probe, | |
1932 | .remove = wbsd_pnp_remove, | |
1933 | }; | |
1934 | ||
1935 | #endif /* CONFIG_PNP */ | |
1936 | ||
1da177e4 LT |
1937 | /* |
1938 | * Module loading/unloading | |
1939 | */ | |
1940 | ||
1941 | static int __init wbsd_drv_init(void) | |
1942 | { | |
1943 | int result; | |
1944 | ||
1945 | printk(KERN_INFO DRIVER_NAME | |
1946 | ": Winbond W83L51xD SD/MMC card interface driver, " | |
1947 | DRIVER_VERSION "\n"); | |
1948 | printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); | |
1da177e4 | 1949 | |
85bcc130 PO |
1950 | #ifdef CONFIG_PNP |
1951 | ||
1952 | if (!nopnp) | |
1953 | { | |
1954 | result = pnp_register_driver(&wbsd_pnp_driver); | |
1955 | if (result < 0) | |
1956 | return result; | |
1957 | } | |
1958 | ||
1959 | #endif /* CONFIG_PNP */ | |
1960 | ||
1961 | if (nopnp) | |
1962 | { | |
1963 | result = driver_register(&wbsd_driver); | |
1964 | if (result < 0) | |
1965 | return result; | |
1966 | ||
1967 | wbsd_device = platform_device_register_simple(DRIVER_NAME, -1, | |
1968 | NULL, 0); | |
1969 | if (IS_ERR(wbsd_device)) | |
1970 | return PTR_ERR(wbsd_device); | |
1971 | } | |
1da177e4 LT |
1972 | |
1973 | return 0; | |
1974 | } | |
1975 | ||
1976 | static void __exit wbsd_drv_exit(void) | |
1977 | { | |
85bcc130 PO |
1978 | #ifdef CONFIG_PNP |
1979 | ||
1980 | if (!nopnp) | |
1981 | pnp_unregister_driver(&wbsd_pnp_driver); | |
1da177e4 | 1982 | |
85bcc130 PO |
1983 | #endif /* CONFIG_PNP */ |
1984 | ||
1985 | if (nopnp) | |
1986 | { | |
1987 | platform_device_unregister(wbsd_device); | |
1988 | ||
1989 | driver_unregister(&wbsd_driver); | |
1990 | } | |
1da177e4 LT |
1991 | |
1992 | DBG("unloaded\n"); | |
1993 | } | |
1994 | ||
1995 | module_init(wbsd_drv_init); | |
1996 | module_exit(wbsd_drv_exit); | |
85bcc130 PO |
1997 | #ifdef CONFIG_PNP |
1998 | module_param(nopnp, uint, 0444); | |
1999 | #endif | |
1da177e4 LT |
2000 | module_param(io, uint, 0444); |
2001 | module_param(irq, uint, 0444); | |
2002 | module_param(dma, int, 0444); | |
2003 | ||
2004 | MODULE_LICENSE("GPL"); | |
2005 | MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver"); | |
2006 | MODULE_VERSION(DRIVER_VERSION); | |
2007 | ||
85bcc130 PO |
2008 | #ifdef CONFIG_PNP |
2009 | MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)"); | |
2010 | #endif | |
1da177e4 LT |
2011 | MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)"); |
2012 | MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)"); | |
2013 | MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)"); |