Commit | Line | Data |
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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" | |
85bcc130 | 45 | #define DRIVER_VERSION "1.2" |
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 | ||
1da177e4 LT |
57 | #ifdef CONFIG_MMC_DEBUG |
58 | void DBG_REG(int reg, u8 value) | |
59 | { | |
60 | int i; | |
61 | ||
62 | printk(KERN_DEBUG "wbsd: Register %d: 0x%02X %3d '%c' ", | |
63 | reg, (int)value, (int)value, (value < 0x20)?'.':value); | |
64 | ||
65 | for (i = 7;i >= 0;i--) | |
66 | { | |
67 | if (value & (1 << i)) | |
68 | printk("x"); | |
69 | else | |
70 | printk("."); | |
71 | } | |
72 | ||
73 | printk("\n"); | |
74 | } | |
75 | #else | |
76 | #define DBG_REG(r, v) do {} while (0) | |
77 | #endif | |
78 | ||
85bcc130 PO |
79 | /* |
80 | * Device resources | |
81 | */ | |
82 | ||
83 | #ifdef CONFIG_PNP | |
84 | ||
85 | static const struct pnp_device_id pnp_dev_table[] = { | |
86 | { "WEC0517", 0 }, | |
87 | { "WEC0518", 0 }, | |
88 | { "", 0 }, | |
89 | }; | |
90 | ||
91 | MODULE_DEVICE_TABLE(pnp, pnp_dev_table); | |
92 | ||
93 | #endif /* CONFIG_PNP */ | |
94 | ||
95 | #ifdef CONFIG_PNP | |
96 | static unsigned int nopnp = 0; | |
97 | #else | |
98 | static const unsigned int nopnp = 1; | |
99 | #endif | |
100 | static unsigned int io = 0x248; | |
101 | static unsigned int irq = 6; | |
102 | static int dma = 2; | |
103 | ||
1da177e4 LT |
104 | /* |
105 | * Basic functions | |
106 | */ | |
107 | ||
108 | static inline void wbsd_unlock_config(struct wbsd_host* host) | |
109 | { | |
85bcc130 PO |
110 | BUG_ON(host->config == 0); |
111 | ||
1da177e4 LT |
112 | outb(host->unlock_code, host->config); |
113 | outb(host->unlock_code, host->config); | |
114 | } | |
115 | ||
116 | static inline void wbsd_lock_config(struct wbsd_host* host) | |
117 | { | |
85bcc130 PO |
118 | BUG_ON(host->config == 0); |
119 | ||
1da177e4 LT |
120 | outb(LOCK_CODE, host->config); |
121 | } | |
122 | ||
123 | static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value) | |
124 | { | |
85bcc130 PO |
125 | BUG_ON(host->config == 0); |
126 | ||
1da177e4 LT |
127 | outb(reg, host->config); |
128 | outb(value, host->config + 1); | |
129 | } | |
130 | ||
131 | static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg) | |
132 | { | |
85bcc130 PO |
133 | BUG_ON(host->config == 0); |
134 | ||
1da177e4 LT |
135 | outb(reg, host->config); |
136 | return inb(host->config + 1); | |
137 | } | |
138 | ||
139 | static inline void wbsd_write_index(struct wbsd_host* host, u8 index, u8 value) | |
140 | { | |
141 | outb(index, host->base + WBSD_IDXR); | |
142 | outb(value, host->base + WBSD_DATAR); | |
143 | } | |
144 | ||
145 | static inline u8 wbsd_read_index(struct wbsd_host* host, u8 index) | |
146 | { | |
147 | outb(index, host->base + WBSD_IDXR); | |
148 | return inb(host->base + WBSD_DATAR); | |
149 | } | |
150 | ||
151 | /* | |
152 | * Common routines | |
153 | */ | |
154 | ||
155 | static void wbsd_init_device(struct wbsd_host* host) | |
156 | { | |
157 | u8 setup, ier; | |
158 | ||
159 | /* | |
160 | * Reset chip (SD/MMC part) and fifo. | |
161 | */ | |
162 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
163 | setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET; | |
164 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
165 | ||
85bcc130 PO |
166 | /* |
167 | * Set DAT3 to input | |
168 | */ | |
169 | setup &= ~WBSD_DAT3_H; | |
170 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
171 | host->flags &= ~WBSD_FIGNORE_DETECT; | |
172 | ||
1da177e4 LT |
173 | /* |
174 | * Read back default clock. | |
175 | */ | |
176 | host->clk = wbsd_read_index(host, WBSD_IDX_CLK); | |
177 | ||
178 | /* | |
179 | * Power down port. | |
180 | */ | |
181 | outb(WBSD_POWER_N, host->base + WBSD_CSR); | |
182 | ||
183 | /* | |
184 | * Set maximum timeout. | |
185 | */ | |
186 | wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F); | |
187 | ||
85bcc130 PO |
188 | /* |
189 | * Test for card presence | |
190 | */ | |
191 | if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT) | |
192 | host->flags |= WBSD_FCARD_PRESENT; | |
193 | else | |
194 | host->flags &= ~WBSD_FCARD_PRESENT; | |
195 | ||
1da177e4 LT |
196 | /* |
197 | * Enable interesting interrupts. | |
198 | */ | |
199 | ier = 0; | |
200 | ier |= WBSD_EINT_CARD; | |
201 | ier |= WBSD_EINT_FIFO_THRE; | |
202 | ier |= WBSD_EINT_CCRC; | |
203 | ier |= WBSD_EINT_TIMEOUT; | |
204 | ier |= WBSD_EINT_CRC; | |
205 | ier |= WBSD_EINT_TC; | |
206 | ||
207 | outb(ier, host->base + WBSD_EIR); | |
208 | ||
209 | /* | |
210 | * Clear interrupts. | |
211 | */ | |
212 | inb(host->base + WBSD_ISR); | |
213 | } | |
214 | ||
215 | static void wbsd_reset(struct wbsd_host* host) | |
216 | { | |
217 | u8 setup; | |
218 | ||
219 | printk(KERN_ERR DRIVER_NAME ": Resetting chip\n"); | |
220 | ||
221 | /* | |
222 | * Soft reset of chip (SD/MMC part). | |
223 | */ | |
224 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
225 | setup |= WBSD_SOFT_RESET; | |
226 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
227 | } | |
228 | ||
229 | static void wbsd_request_end(struct wbsd_host* host, struct mmc_request* mrq) | |
230 | { | |
231 | unsigned long dmaflags; | |
232 | ||
233 | DBGF("Ending request, cmd (%x)\n", mrq->cmd->opcode); | |
234 | ||
235 | if (host->dma >= 0) | |
236 | { | |
237 | /* | |
238 | * Release ISA DMA controller. | |
239 | */ | |
240 | dmaflags = claim_dma_lock(); | |
241 | disable_dma(host->dma); | |
242 | clear_dma_ff(host->dma); | |
243 | release_dma_lock(dmaflags); | |
244 | ||
245 | /* | |
246 | * Disable DMA on host. | |
247 | */ | |
248 | wbsd_write_index(host, WBSD_IDX_DMA, 0); | |
249 | } | |
250 | ||
251 | host->mrq = NULL; | |
252 | ||
253 | /* | |
254 | * MMC layer might call back into the driver so first unlock. | |
255 | */ | |
256 | spin_unlock(&host->lock); | |
257 | mmc_request_done(host->mmc, mrq); | |
258 | spin_lock(&host->lock); | |
259 | } | |
260 | ||
261 | /* | |
262 | * Scatter/gather functions | |
263 | */ | |
264 | ||
265 | static inline void wbsd_init_sg(struct wbsd_host* host, struct mmc_data* data) | |
266 | { | |
267 | /* | |
268 | * Get info. about SG list from data structure. | |
269 | */ | |
270 | host->cur_sg = data->sg; | |
271 | host->num_sg = data->sg_len; | |
272 | ||
273 | host->offset = 0; | |
274 | host->remain = host->cur_sg->length; | |
275 | } | |
276 | ||
277 | static inline int wbsd_next_sg(struct wbsd_host* host) | |
278 | { | |
279 | /* | |
280 | * Skip to next SG entry. | |
281 | */ | |
282 | host->cur_sg++; | |
283 | host->num_sg--; | |
284 | ||
285 | /* | |
286 | * Any entries left? | |
287 | */ | |
288 | if (host->num_sg > 0) | |
289 | { | |
290 | host->offset = 0; | |
291 | host->remain = host->cur_sg->length; | |
292 | } | |
293 | ||
294 | return host->num_sg; | |
295 | } | |
296 | ||
297 | static inline char* wbsd_kmap_sg(struct wbsd_host* host) | |
298 | { | |
299 | host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ) + | |
300 | host->cur_sg->offset; | |
301 | return host->mapped_sg; | |
302 | } | |
303 | ||
304 | static inline void wbsd_kunmap_sg(struct wbsd_host* host) | |
305 | { | |
306 | kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ); | |
307 | } | |
308 | ||
309 | static inline void wbsd_sg_to_dma(struct wbsd_host* host, struct mmc_data* data) | |
310 | { | |
311 | unsigned int len, i, size; | |
312 | struct scatterlist* sg; | |
313 | char* dmabuf = host->dma_buffer; | |
314 | char* sgbuf; | |
315 | ||
316 | size = host->size; | |
317 | ||
318 | sg = data->sg; | |
319 | len = data->sg_len; | |
320 | ||
321 | /* | |
322 | * Just loop through all entries. Size might not | |
323 | * be the entire list though so make sure that | |
324 | * we do not transfer too much. | |
325 | */ | |
326 | for (i = 0;i < len;i++) | |
327 | { | |
328 | sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset; | |
329 | if (size < sg[i].length) | |
330 | memcpy(dmabuf, sgbuf, size); | |
331 | else | |
332 | memcpy(dmabuf, sgbuf, sg[i].length); | |
333 | kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); | |
334 | dmabuf += sg[i].length; | |
335 | ||
336 | if (size < sg[i].length) | |
337 | size = 0; | |
338 | else | |
339 | size -= sg[i].length; | |
340 | ||
341 | if (size == 0) | |
342 | break; | |
343 | } | |
344 | ||
345 | /* | |
346 | * Check that we didn't get a request to transfer | |
347 | * more data than can fit into the SG list. | |
348 | */ | |
349 | ||
350 | BUG_ON(size != 0); | |
351 | ||
352 | host->size -= size; | |
353 | } | |
354 | ||
355 | static inline void wbsd_dma_to_sg(struct wbsd_host* host, struct mmc_data* data) | |
356 | { | |
357 | unsigned int len, i, size; | |
358 | struct scatterlist* sg; | |
359 | char* dmabuf = host->dma_buffer; | |
360 | char* sgbuf; | |
361 | ||
362 | size = host->size; | |
363 | ||
364 | sg = data->sg; | |
365 | len = data->sg_len; | |
366 | ||
367 | /* | |
368 | * Just loop through all entries. Size might not | |
369 | * be the entire list though so make sure that | |
370 | * we do not transfer too much. | |
371 | */ | |
372 | for (i = 0;i < len;i++) | |
373 | { | |
374 | sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset; | |
375 | if (size < sg[i].length) | |
376 | memcpy(sgbuf, dmabuf, size); | |
377 | else | |
378 | memcpy(sgbuf, dmabuf, sg[i].length); | |
379 | kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); | |
380 | dmabuf += sg[i].length; | |
381 | ||
382 | if (size < sg[i].length) | |
383 | size = 0; | |
384 | else | |
385 | size -= sg[i].length; | |
386 | ||
387 | if (size == 0) | |
388 | break; | |
389 | } | |
390 | ||
391 | /* | |
392 | * Check that we didn't get a request to transfer | |
393 | * more data than can fit into the SG list. | |
394 | */ | |
395 | ||
396 | BUG_ON(size != 0); | |
397 | ||
398 | host->size -= size; | |
399 | } | |
400 | ||
401 | /* | |
402 | * Command handling | |
403 | */ | |
404 | ||
405 | static inline void wbsd_get_short_reply(struct wbsd_host* host, | |
406 | struct mmc_command* cmd) | |
407 | { | |
408 | /* | |
409 | * Correct response type? | |
410 | */ | |
411 | if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) | |
412 | { | |
413 | cmd->error = MMC_ERR_INVALID; | |
414 | return; | |
415 | } | |
416 | ||
417 | cmd->resp[0] = | |
418 | wbsd_read_index(host, WBSD_IDX_RESP12) << 24; | |
419 | cmd->resp[0] |= | |
420 | wbsd_read_index(host, WBSD_IDX_RESP13) << 16; | |
421 | cmd->resp[0] |= | |
422 | wbsd_read_index(host, WBSD_IDX_RESP14) << 8; | |
423 | cmd->resp[0] |= | |
424 | wbsd_read_index(host, WBSD_IDX_RESP15) << 0; | |
425 | cmd->resp[1] = | |
426 | wbsd_read_index(host, WBSD_IDX_RESP16) << 24; | |
427 | } | |
428 | ||
429 | static inline void wbsd_get_long_reply(struct wbsd_host* host, | |
430 | struct mmc_command* cmd) | |
431 | { | |
432 | int i; | |
433 | ||
434 | /* | |
435 | * Correct response type? | |
436 | */ | |
437 | if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) | |
438 | { | |
439 | cmd->error = MMC_ERR_INVALID; | |
440 | return; | |
441 | } | |
442 | ||
443 | for (i = 0;i < 4;i++) | |
444 | { | |
445 | cmd->resp[i] = | |
446 | wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24; | |
447 | cmd->resp[i] |= | |
448 | wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16; | |
449 | cmd->resp[i] |= | |
450 | wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8; | |
451 | cmd->resp[i] |= | |
452 | wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0; | |
453 | } | |
454 | } | |
455 | ||
1da177e4 LT |
456 | static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd) |
457 | { | |
458 | int i; | |
459 | u8 status, isr; | |
460 | ||
461 | DBGF("Sending cmd (%x)\n", cmd->opcode); | |
462 | ||
463 | /* | |
464 | * Clear accumulated ISR. The interrupt routine | |
465 | * will fill this one with events that occur during | |
466 | * transfer. | |
467 | */ | |
468 | host->isr = 0; | |
469 | ||
470 | /* | |
471 | * Send the command (CRC calculated by host). | |
472 | */ | |
473 | outb(cmd->opcode, host->base + WBSD_CMDR); | |
474 | for (i = 3;i >= 0;i--) | |
475 | outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR); | |
476 | ||
477 | cmd->error = MMC_ERR_NONE; | |
478 | ||
479 | /* | |
480 | * Wait for the request to complete. | |
481 | */ | |
482 | do { | |
483 | status = wbsd_read_index(host, WBSD_IDX_STATUS); | |
484 | } while (status & WBSD_CARDTRAFFIC); | |
485 | ||
486 | /* | |
487 | * Do we expect a reply? | |
488 | */ | |
489 | if ((cmd->flags & MMC_RSP_MASK) != MMC_RSP_NONE) | |
490 | { | |
491 | /* | |
492 | * Read back status. | |
493 | */ | |
494 | isr = host->isr; | |
495 | ||
496 | /* Card removed? */ | |
497 | if (isr & WBSD_INT_CARD) | |
498 | cmd->error = MMC_ERR_TIMEOUT; | |
499 | /* Timeout? */ | |
500 | else if (isr & WBSD_INT_TIMEOUT) | |
501 | cmd->error = MMC_ERR_TIMEOUT; | |
502 | /* CRC? */ | |
503 | else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC)) | |
504 | cmd->error = MMC_ERR_BADCRC; | |
505 | /* All ok */ | |
506 | else | |
507 | { | |
508 | if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_SHORT) | |
509 | wbsd_get_short_reply(host, cmd); | |
510 | else | |
511 | wbsd_get_long_reply(host, cmd); | |
512 | } | |
513 | } | |
514 | ||
515 | DBGF("Sent cmd (%x), res %d\n", cmd->opcode, cmd->error); | |
516 | } | |
517 | ||
518 | /* | |
519 | * Data functions | |
520 | */ | |
521 | ||
522 | static void wbsd_empty_fifo(struct wbsd_host* host) | |
523 | { | |
524 | struct mmc_data* data = host->mrq->cmd->data; | |
525 | char* buffer; | |
526 | int i, fsr, fifo; | |
527 | ||
528 | /* | |
529 | * Handle excessive data. | |
530 | */ | |
531 | if (data->bytes_xfered == host->size) | |
532 | return; | |
533 | ||
534 | buffer = wbsd_kmap_sg(host) + host->offset; | |
535 | ||
536 | /* | |
537 | * Drain the fifo. This has a tendency to loop longer | |
538 | * than the FIFO length (usually one block). | |
539 | */ | |
540 | while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) | |
541 | { | |
542 | /* | |
543 | * The size field in the FSR is broken so we have to | |
544 | * do some guessing. | |
545 | */ | |
546 | if (fsr & WBSD_FIFO_FULL) | |
547 | fifo = 16; | |
548 | else if (fsr & WBSD_FIFO_FUTHRE) | |
549 | fifo = 8; | |
550 | else | |
551 | fifo = 1; | |
552 | ||
553 | for (i = 0;i < fifo;i++) | |
554 | { | |
555 | *buffer = inb(host->base + WBSD_DFR); | |
556 | buffer++; | |
557 | host->offset++; | |
558 | host->remain--; | |
559 | ||
560 | data->bytes_xfered++; | |
561 | ||
562 | /* | |
563 | * Transfer done? | |
564 | */ | |
565 | if (data->bytes_xfered == host->size) | |
566 | { | |
567 | wbsd_kunmap_sg(host); | |
568 | return; | |
569 | } | |
570 | ||
571 | /* | |
572 | * End of scatter list entry? | |
573 | */ | |
574 | if (host->remain == 0) | |
575 | { | |
576 | wbsd_kunmap_sg(host); | |
577 | ||
578 | /* | |
579 | * Get next entry. Check if last. | |
580 | */ | |
581 | if (!wbsd_next_sg(host)) | |
582 | { | |
583 | /* | |
584 | * We should never reach this point. | |
585 | * It means that we're trying to | |
586 | * transfer more blocks than can fit | |
587 | * into the scatter list. | |
588 | */ | |
589 | BUG_ON(1); | |
590 | ||
591 | host->size = data->bytes_xfered; | |
592 | ||
593 | return; | |
594 | } | |
595 | ||
596 | buffer = wbsd_kmap_sg(host); | |
597 | } | |
598 | } | |
599 | } | |
600 | ||
601 | wbsd_kunmap_sg(host); | |
602 | ||
603 | /* | |
604 | * This is a very dirty hack to solve a | |
605 | * hardware problem. The chip doesn't trigger | |
606 | * FIFO threshold interrupts properly. | |
607 | */ | |
608 | if ((host->size - data->bytes_xfered) < 16) | |
609 | tasklet_schedule(&host->fifo_tasklet); | |
610 | } | |
611 | ||
612 | static void wbsd_fill_fifo(struct wbsd_host* host) | |
613 | { | |
614 | struct mmc_data* data = host->mrq->cmd->data; | |
615 | char* buffer; | |
616 | int i, fsr, fifo; | |
617 | ||
618 | /* | |
619 | * Check that we aren't being called after the | |
620 | * entire buffer has been transfered. | |
621 | */ | |
622 | if (data->bytes_xfered == host->size) | |
623 | return; | |
624 | ||
625 | buffer = wbsd_kmap_sg(host) + host->offset; | |
626 | ||
627 | /* | |
628 | * Fill the fifo. This has a tendency to loop longer | |
629 | * than the FIFO length (usually one block). | |
630 | */ | |
631 | while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) | |
632 | { | |
633 | /* | |
634 | * The size field in the FSR is broken so we have to | |
635 | * do some guessing. | |
636 | */ | |
637 | if (fsr & WBSD_FIFO_EMPTY) | |
638 | fifo = 0; | |
639 | else if (fsr & WBSD_FIFO_EMTHRE) | |
640 | fifo = 8; | |
641 | else | |
642 | fifo = 15; | |
643 | ||
644 | for (i = 16;i > fifo;i--) | |
645 | { | |
646 | outb(*buffer, host->base + WBSD_DFR); | |
647 | buffer++; | |
648 | host->offset++; | |
649 | host->remain--; | |
650 | ||
651 | data->bytes_xfered++; | |
652 | ||
653 | /* | |
654 | * Transfer done? | |
655 | */ | |
656 | if (data->bytes_xfered == host->size) | |
657 | { | |
658 | wbsd_kunmap_sg(host); | |
659 | return; | |
660 | } | |
661 | ||
662 | /* | |
663 | * End of scatter list entry? | |
664 | */ | |
665 | if (host->remain == 0) | |
666 | { | |
667 | wbsd_kunmap_sg(host); | |
668 | ||
669 | /* | |
670 | * Get next entry. Check if last. | |
671 | */ | |
672 | if (!wbsd_next_sg(host)) | |
673 | { | |
674 | /* | |
675 | * We should never reach this point. | |
676 | * It means that we're trying to | |
677 | * transfer more blocks than can fit | |
678 | * into the scatter list. | |
679 | */ | |
680 | BUG_ON(1); | |
681 | ||
682 | host->size = data->bytes_xfered; | |
683 | ||
684 | return; | |
685 | } | |
686 | ||
687 | buffer = wbsd_kmap_sg(host); | |
688 | } | |
689 | } | |
690 | } | |
691 | ||
692 | wbsd_kunmap_sg(host); | |
85bcc130 PO |
693 | |
694 | /* | |
695 | * The controller stops sending interrupts for | |
696 | * 'FIFO empty' under certain conditions. So we | |
697 | * need to be a bit more pro-active. | |
698 | */ | |
699 | tasklet_schedule(&host->fifo_tasklet); | |
1da177e4 LT |
700 | } |
701 | ||
702 | static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) | |
703 | { | |
704 | u16 blksize; | |
705 | u8 setup; | |
706 | unsigned long dmaflags; | |
707 | ||
708 | DBGF("blksz %04x blks %04x flags %08x\n", | |
709 | 1 << data->blksz_bits, data->blocks, data->flags); | |
710 | DBGF("tsac %d ms nsac %d clk\n", | |
711 | data->timeout_ns / 1000000, data->timeout_clks); | |
712 | ||
713 | /* | |
714 | * Calculate size. | |
715 | */ | |
716 | host->size = data->blocks << data->blksz_bits; | |
717 | ||
718 | /* | |
719 | * Check timeout values for overflow. | |
720 | * (Yes, some cards cause this value to overflow). | |
721 | */ | |
722 | if (data->timeout_ns > 127000000) | |
723 | wbsd_write_index(host, WBSD_IDX_TAAC, 127); | |
724 | else | |
725 | wbsd_write_index(host, WBSD_IDX_TAAC, data->timeout_ns/1000000); | |
726 | ||
727 | if (data->timeout_clks > 255) | |
728 | wbsd_write_index(host, WBSD_IDX_NSAC, 255); | |
729 | else | |
730 | wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks); | |
731 | ||
732 | /* | |
733 | * Inform the chip of how large blocks will be | |
734 | * sent. It needs this to determine when to | |
735 | * calculate CRC. | |
736 | * | |
737 | * Space for CRC must be included in the size. | |
738 | */ | |
739 | blksize = (1 << data->blksz_bits) + 2; | |
740 | ||
741 | wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0); | |
742 | wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); | |
743 | ||
744 | /* | |
745 | * Clear the FIFO. This is needed even for DMA | |
746 | * transfers since the chip still uses the FIFO | |
747 | * internally. | |
748 | */ | |
749 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
750 | setup |= WBSD_FIFO_RESET; | |
751 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
752 | ||
753 | /* | |
754 | * DMA transfer? | |
755 | */ | |
756 | if (host->dma >= 0) | |
757 | { | |
758 | /* | |
759 | * The buffer for DMA is only 64 kB. | |
760 | */ | |
761 | BUG_ON(host->size > 0x10000); | |
762 | if (host->size > 0x10000) | |
763 | { | |
764 | data->error = MMC_ERR_INVALID; | |
765 | return; | |
766 | } | |
767 | ||
768 | /* | |
769 | * Transfer data from the SG list to | |
770 | * the DMA buffer. | |
771 | */ | |
772 | if (data->flags & MMC_DATA_WRITE) | |
773 | wbsd_sg_to_dma(host, data); | |
774 | ||
775 | /* | |
776 | * Initialise the ISA DMA controller. | |
777 | */ | |
778 | dmaflags = claim_dma_lock(); | |
779 | disable_dma(host->dma); | |
780 | clear_dma_ff(host->dma); | |
781 | if (data->flags & MMC_DATA_READ) | |
782 | set_dma_mode(host->dma, DMA_MODE_READ & ~0x40); | |
783 | else | |
784 | set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40); | |
785 | set_dma_addr(host->dma, host->dma_addr); | |
786 | set_dma_count(host->dma, host->size); | |
787 | ||
788 | enable_dma(host->dma); | |
789 | release_dma_lock(dmaflags); | |
790 | ||
791 | /* | |
792 | * Enable DMA on the host. | |
793 | */ | |
794 | wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE); | |
795 | } | |
796 | else | |
797 | { | |
798 | /* | |
799 | * This flag is used to keep printk | |
800 | * output to a minimum. | |
801 | */ | |
802 | host->firsterr = 1; | |
803 | ||
804 | /* | |
805 | * Initialise the SG list. | |
806 | */ | |
807 | wbsd_init_sg(host, data); | |
808 | ||
809 | /* | |
810 | * Turn off DMA. | |
811 | */ | |
812 | wbsd_write_index(host, WBSD_IDX_DMA, 0); | |
813 | ||
814 | /* | |
815 | * Set up FIFO threshold levels (and fill | |
816 | * buffer if doing a write). | |
817 | */ | |
818 | if (data->flags & MMC_DATA_READ) | |
819 | { | |
820 | wbsd_write_index(host, WBSD_IDX_FIFOEN, | |
821 | WBSD_FIFOEN_FULL | 8); | |
822 | } | |
823 | else | |
824 | { | |
825 | wbsd_write_index(host, WBSD_IDX_FIFOEN, | |
826 | WBSD_FIFOEN_EMPTY | 8); | |
827 | wbsd_fill_fifo(host); | |
828 | } | |
829 | } | |
830 | ||
831 | data->error = MMC_ERR_NONE; | |
832 | } | |
833 | ||
834 | static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) | |
835 | { | |
836 | unsigned long dmaflags; | |
837 | int count; | |
838 | u8 status; | |
839 | ||
840 | WARN_ON(host->mrq == NULL); | |
841 | ||
842 | /* | |
843 | * Send a stop command if needed. | |
844 | */ | |
845 | if (data->stop) | |
846 | wbsd_send_command(host, data->stop); | |
847 | ||
848 | /* | |
849 | * Wait for the controller to leave data | |
850 | * transfer state. | |
851 | */ | |
852 | do | |
853 | { | |
854 | status = wbsd_read_index(host, WBSD_IDX_STATUS); | |
855 | } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE)); | |
856 | ||
857 | /* | |
858 | * DMA transfer? | |
859 | */ | |
860 | if (host->dma >= 0) | |
861 | { | |
862 | /* | |
863 | * Disable DMA on the host. | |
864 | */ | |
865 | wbsd_write_index(host, WBSD_IDX_DMA, 0); | |
866 | ||
867 | /* | |
868 | * Turn of ISA DMA controller. | |
869 | */ | |
870 | dmaflags = claim_dma_lock(); | |
871 | disable_dma(host->dma); | |
872 | clear_dma_ff(host->dma); | |
873 | count = get_dma_residue(host->dma); | |
874 | release_dma_lock(dmaflags); | |
875 | ||
876 | /* | |
877 | * Any leftover data? | |
878 | */ | |
879 | if (count) | |
880 | { | |
881 | printk(KERN_ERR DRIVER_NAME ": Incomplete DMA " | |
882 | "transfer. %d bytes left.\n", count); | |
883 | ||
884 | data->error = MMC_ERR_FAILED; | |
885 | } | |
886 | else | |
887 | { | |
888 | /* | |
889 | * Transfer data from DMA buffer to | |
890 | * SG list. | |
891 | */ | |
892 | if (data->flags & MMC_DATA_READ) | |
893 | wbsd_dma_to_sg(host, data); | |
894 | ||
895 | data->bytes_xfered = host->size; | |
896 | } | |
897 | } | |
898 | ||
899 | DBGF("Ending data transfer (%d bytes)\n", data->bytes_xfered); | |
900 | ||
901 | wbsd_request_end(host, host->mrq); | |
902 | } | |
903 | ||
85bcc130 PO |
904 | /*****************************************************************************\ |
905 | * * | |
906 | * MMC layer callbacks * | |
907 | * * | |
908 | \*****************************************************************************/ | |
1da177e4 LT |
909 | |
910 | static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq) | |
911 | { | |
912 | struct wbsd_host* host = mmc_priv(mmc); | |
913 | struct mmc_command* cmd; | |
914 | ||
915 | /* | |
916 | * Disable tasklets to avoid a deadlock. | |
917 | */ | |
918 | spin_lock_bh(&host->lock); | |
919 | ||
920 | BUG_ON(host->mrq != NULL); | |
921 | ||
922 | cmd = mrq->cmd; | |
923 | ||
924 | host->mrq = mrq; | |
925 | ||
926 | /* | |
927 | * If there is no card in the slot then | |
928 | * timeout immediatly. | |
929 | */ | |
85bcc130 | 930 | if (!(host->flags & WBSD_FCARD_PRESENT)) |
1da177e4 LT |
931 | { |
932 | cmd->error = MMC_ERR_TIMEOUT; | |
933 | goto done; | |
934 | } | |
935 | ||
936 | /* | |
937 | * Does the request include data? | |
938 | */ | |
939 | if (cmd->data) | |
940 | { | |
941 | wbsd_prepare_data(host, cmd->data); | |
942 | ||
943 | if (cmd->data->error != MMC_ERR_NONE) | |
944 | goto done; | |
945 | } | |
946 | ||
947 | wbsd_send_command(host, cmd); | |
948 | ||
949 | /* | |
950 | * If this is a data transfer the request | |
951 | * will be finished after the data has | |
952 | * transfered. | |
953 | */ | |
954 | if (cmd->data && (cmd->error == MMC_ERR_NONE)) | |
955 | { | |
956 | /* | |
957 | * Dirty fix for hardware bug. | |
958 | */ | |
959 | if (host->dma == -1) | |
960 | tasklet_schedule(&host->fifo_tasklet); | |
961 | ||
962 | spin_unlock_bh(&host->lock); | |
963 | ||
964 | return; | |
965 | } | |
966 | ||
967 | done: | |
968 | wbsd_request_end(host, mrq); | |
969 | ||
970 | spin_unlock_bh(&host->lock); | |
971 | } | |
972 | ||
973 | static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) | |
974 | { | |
975 | struct wbsd_host* host = mmc_priv(mmc); | |
976 | u8 clk, setup, pwr; | |
977 | ||
978 | DBGF("clock %uHz busmode %u powermode %u Vdd %u\n", | |
979 | ios->clock, ios->bus_mode, ios->power_mode, ios->vdd); | |
980 | ||
981 | spin_lock_bh(&host->lock); | |
982 | ||
983 | /* | |
984 | * Reset the chip on each power off. | |
985 | * Should clear out any weird states. | |
986 | */ | |
987 | if (ios->power_mode == MMC_POWER_OFF) | |
988 | wbsd_init_device(host); | |
989 | ||
990 | if (ios->clock >= 24000000) | |
991 | clk = WBSD_CLK_24M; | |
992 | else if (ios->clock >= 16000000) | |
993 | clk = WBSD_CLK_16M; | |
994 | else if (ios->clock >= 12000000) | |
995 | clk = WBSD_CLK_12M; | |
996 | else | |
997 | clk = WBSD_CLK_375K; | |
998 | ||
999 | /* | |
1000 | * Only write to the clock register when | |
1001 | * there is an actual change. | |
1002 | */ | |
1003 | if (clk != host->clk) | |
1004 | { | |
1005 | wbsd_write_index(host, WBSD_IDX_CLK, clk); | |
1006 | host->clk = clk; | |
1007 | } | |
1008 | ||
85bcc130 PO |
1009 | /* |
1010 | * Power up card. | |
1011 | */ | |
1da177e4 LT |
1012 | if (ios->power_mode != MMC_POWER_OFF) |
1013 | { | |
1da177e4 LT |
1014 | pwr = inb(host->base + WBSD_CSR); |
1015 | pwr &= ~WBSD_POWER_N; | |
1016 | outb(pwr, host->base + WBSD_CSR); | |
1da177e4 LT |
1017 | } |
1018 | ||
85bcc130 PO |
1019 | /* |
1020 | * MMC cards need to have pin 1 high during init. | |
1021 | * Init time corresponds rather nicely with the bus mode. | |
1022 | * It wreaks havoc with the card detection though so | |
1023 | * that needs to be disabed. | |
1024 | */ | |
1025 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); | |
1026 | if ((ios->power_mode == MMC_POWER_ON) && | |
1027 | (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)) | |
1028 | { | |
1029 | setup |= WBSD_DAT3_H; | |
1030 | host->flags |= WBSD_FIGNORE_DETECT; | |
1031 | } | |
1032 | else | |
1033 | { | |
1034 | setup &= ~WBSD_DAT3_H; | |
1035 | host->flags &= ~WBSD_FIGNORE_DETECT; | |
1036 | } | |
1037 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); | |
1038 | ||
1da177e4 LT |
1039 | spin_unlock_bh(&host->lock); |
1040 | } | |
1041 | ||
85bcc130 PO |
1042 | static struct mmc_host_ops wbsd_ops = { |
1043 | .request = wbsd_request, | |
1044 | .set_ios = wbsd_set_ios, | |
1045 | }; | |
1046 | ||
1047 | /*****************************************************************************\ | |
1048 | * * | |
1049 | * Interrupt handling * | |
1050 | * * | |
1051 | \*****************************************************************************/ | |
1052 | ||
6e6293dd PO |
1053 | /* |
1054 | * Helper function for card detection | |
1055 | */ | |
1056 | static void wbsd_detect_card(unsigned long data) | |
1057 | { | |
1058 | struct wbsd_host *host = (struct wbsd_host*)data; | |
1059 | ||
1060 | BUG_ON(host == NULL); | |
1061 | ||
1062 | DBG("Executing card detection\n"); | |
1063 | ||
1064 | mmc_detect_change(host->mmc); | |
1065 | } | |
1066 | ||
1da177e4 LT |
1067 | /* |
1068 | * Tasklets | |
1069 | */ | |
1070 | ||
1071 | inline static struct mmc_data* wbsd_get_data(struct wbsd_host* host) | |
1072 | { | |
1073 | WARN_ON(!host->mrq); | |
1074 | if (!host->mrq) | |
1075 | return NULL; | |
1076 | ||
1077 | WARN_ON(!host->mrq->cmd); | |
1078 | if (!host->mrq->cmd) | |
1079 | return NULL; | |
1080 | ||
1081 | WARN_ON(!host->mrq->cmd->data); | |
1082 | if (!host->mrq->cmd->data) | |
1083 | return NULL; | |
1084 | ||
1085 | return host->mrq->cmd->data; | |
1086 | } | |
1087 | ||
1088 | static void wbsd_tasklet_card(unsigned long param) | |
1089 | { | |
1090 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1091 | u8 csr; | |
1092 | ||
1093 | spin_lock(&host->lock); | |
1094 | ||
85bcc130 PO |
1095 | if (host->flags & WBSD_FIGNORE_DETECT) |
1096 | { | |
1097 | spin_unlock(&host->lock); | |
1098 | return; | |
1099 | } | |
1100 | ||
1da177e4 LT |
1101 | csr = inb(host->base + WBSD_CSR); |
1102 | WARN_ON(csr == 0xff); | |
1103 | ||
1104 | if (csr & WBSD_CARDPRESENT) | |
85bcc130 PO |
1105 | { |
1106 | if (!(host->flags & WBSD_FCARD_PRESENT)) | |
1107 | { | |
1108 | DBG("Card inserted\n"); | |
1109 | host->flags |= WBSD_FCARD_PRESENT; | |
6e6293dd PO |
1110 | |
1111 | /* | |
1112 | * Delay card detection to allow electrical connections | |
1113 | * to stabilise. | |
1114 | */ | |
1115 | mod_timer(&host->timer, jiffies + HZ/2); | |
85bcc130 | 1116 | } |
6e6293dd PO |
1117 | |
1118 | spin_unlock(&host->lock); | |
85bcc130 PO |
1119 | } |
1120 | else if (host->flags & WBSD_FCARD_PRESENT) | |
1da177e4 LT |
1121 | { |
1122 | DBG("Card removed\n"); | |
85bcc130 | 1123 | host->flags &= ~WBSD_FCARD_PRESENT; |
1da177e4 LT |
1124 | |
1125 | if (host->mrq) | |
1126 | { | |
1127 | printk(KERN_ERR DRIVER_NAME | |
1128 | ": Card removed during transfer!\n"); | |
1129 | wbsd_reset(host); | |
1130 | ||
1131 | host->mrq->cmd->error = MMC_ERR_FAILED; | |
1132 | tasklet_schedule(&host->finish_tasklet); | |
1133 | } | |
6e6293dd PO |
1134 | |
1135 | /* | |
1136 | * Unlock first since we might get a call back. | |
1137 | */ | |
1138 | spin_unlock(&host->lock); | |
1da177e4 | 1139 | |
85bcc130 | 1140 | mmc_detect_change(host->mmc); |
6e6293dd | 1141 | } |
1da177e4 LT |
1142 | } |
1143 | ||
1144 | static void wbsd_tasklet_fifo(unsigned long param) | |
1145 | { | |
1146 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1147 | struct mmc_data* data; | |
1148 | ||
1149 | spin_lock(&host->lock); | |
1150 | ||
1151 | if (!host->mrq) | |
1152 | goto end; | |
1153 | ||
1154 | data = wbsd_get_data(host); | |
1155 | if (!data) | |
1156 | goto end; | |
1157 | ||
1158 | if (data->flags & MMC_DATA_WRITE) | |
1159 | wbsd_fill_fifo(host); | |
1160 | else | |
1161 | wbsd_empty_fifo(host); | |
1162 | ||
1163 | /* | |
1164 | * Done? | |
1165 | */ | |
1166 | if (host->size == data->bytes_xfered) | |
1167 | { | |
1168 | wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); | |
1169 | tasklet_schedule(&host->finish_tasklet); | |
1170 | } | |
1171 | ||
1172 | end: | |
1173 | spin_unlock(&host->lock); | |
1174 | } | |
1175 | ||
1176 | static void wbsd_tasklet_crc(unsigned long param) | |
1177 | { | |
1178 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1179 | struct mmc_data* data; | |
1180 | ||
1181 | spin_lock(&host->lock); | |
1182 | ||
1183 | if (!host->mrq) | |
1184 | goto end; | |
1185 | ||
1186 | data = wbsd_get_data(host); | |
1187 | if (!data) | |
1188 | goto end; | |
1189 | ||
1190 | DBGF("CRC error\n"); | |
1191 | ||
1192 | data->error = MMC_ERR_BADCRC; | |
1193 | ||
1194 | tasklet_schedule(&host->finish_tasklet); | |
1195 | ||
1196 | end: | |
1197 | spin_unlock(&host->lock); | |
1198 | } | |
1199 | ||
1200 | static void wbsd_tasklet_timeout(unsigned long param) | |
1201 | { | |
1202 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1203 | struct mmc_data* data; | |
1204 | ||
1205 | spin_lock(&host->lock); | |
1206 | ||
1207 | if (!host->mrq) | |
1208 | goto end; | |
1209 | ||
1210 | data = wbsd_get_data(host); | |
1211 | if (!data) | |
1212 | goto end; | |
1213 | ||
1214 | DBGF("Timeout\n"); | |
1215 | ||
1216 | data->error = MMC_ERR_TIMEOUT; | |
1217 | ||
1218 | tasklet_schedule(&host->finish_tasklet); | |
1219 | ||
1220 | end: | |
1221 | spin_unlock(&host->lock); | |
1222 | } | |
1223 | ||
1224 | static void wbsd_tasklet_finish(unsigned long param) | |
1225 | { | |
1226 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1227 | struct mmc_data* data; | |
1228 | ||
1229 | spin_lock(&host->lock); | |
1230 | ||
1231 | WARN_ON(!host->mrq); | |
1232 | if (!host->mrq) | |
1233 | goto end; | |
1234 | ||
1235 | data = wbsd_get_data(host); | |
1236 | if (!data) | |
1237 | goto end; | |
1238 | ||
1239 | wbsd_finish_data(host, data); | |
1240 | ||
1241 | end: | |
1242 | spin_unlock(&host->lock); | |
1243 | } | |
1244 | ||
1245 | static void wbsd_tasklet_block(unsigned long param) | |
1246 | { | |
1247 | struct wbsd_host* host = (struct wbsd_host*)param; | |
1248 | struct mmc_data* data; | |
1249 | ||
1250 | spin_lock(&host->lock); | |
1251 | ||
1252 | if ((wbsd_read_index(host, WBSD_IDX_CRCSTATUS) & WBSD_CRC_MASK) != | |
1253 | WBSD_CRC_OK) | |
1254 | { | |
1255 | data = wbsd_get_data(host); | |
1256 | if (!data) | |
1257 | goto end; | |
1258 | ||
1259 | DBGF("CRC error\n"); | |
1260 | ||
1261 | data->error = MMC_ERR_BADCRC; | |
1262 | ||
1263 | tasklet_schedule(&host->finish_tasklet); | |
1264 | } | |
1265 | ||
1266 | end: | |
1267 | spin_unlock(&host->lock); | |
1268 | } | |
1269 | ||
1270 | /* | |
1271 | * Interrupt handling | |
1272 | */ | |
1273 | ||
1274 | static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs) | |
1275 | { | |
1276 | struct wbsd_host* host = dev_id; | |
1277 | int isr; | |
1278 | ||
1279 | isr = inb(host->base + WBSD_ISR); | |
1280 | ||
1281 | /* | |
1282 | * Was it actually our hardware that caused the interrupt? | |
1283 | */ | |
1284 | if (isr == 0xff || isr == 0x00) | |
1285 | return IRQ_NONE; | |
1286 | ||
1287 | host->isr |= isr; | |
1288 | ||
1289 | /* | |
1290 | * Schedule tasklets as needed. | |
1291 | */ | |
1292 | if (isr & WBSD_INT_CARD) | |
1293 | tasklet_schedule(&host->card_tasklet); | |
1294 | if (isr & WBSD_INT_FIFO_THRE) | |
1295 | tasklet_schedule(&host->fifo_tasklet); | |
1296 | if (isr & WBSD_INT_CRC) | |
1297 | tasklet_hi_schedule(&host->crc_tasklet); | |
1298 | if (isr & WBSD_INT_TIMEOUT) | |
1299 | tasklet_hi_schedule(&host->timeout_tasklet); | |
1300 | if (isr & WBSD_INT_BUSYEND) | |
1301 | tasklet_hi_schedule(&host->block_tasklet); | |
1302 | if (isr & WBSD_INT_TC) | |
1303 | tasklet_schedule(&host->finish_tasklet); | |
1304 | ||
1305 | return IRQ_HANDLED; | |
1306 | } | |
1307 | ||
85bcc130 PO |
1308 | /*****************************************************************************\ |
1309 | * * | |
1310 | * Device initialisation and shutdown * | |
1311 | * * | |
1312 | \*****************************************************************************/ | |
1313 | ||
1da177e4 | 1314 | /* |
85bcc130 | 1315 | * Allocate/free MMC structure. |
1da177e4 LT |
1316 | */ |
1317 | ||
85bcc130 PO |
1318 | static int __devinit wbsd_alloc_mmc(struct device* dev) |
1319 | { | |
1320 | struct mmc_host* mmc; | |
1321 | struct wbsd_host* host; | |
1322 | ||
1323 | /* | |
1324 | * Allocate MMC structure. | |
1325 | */ | |
1326 | mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev); | |
1327 | if (!mmc) | |
1328 | return -ENOMEM; | |
1329 | ||
1330 | host = mmc_priv(mmc); | |
1331 | host->mmc = mmc; | |
1332 | ||
1333 | host->dma = -1; | |
1334 | ||
1335 | /* | |
1336 | * Set host parameters. | |
1337 | */ | |
1338 | mmc->ops = &wbsd_ops; | |
1339 | mmc->f_min = 375000; | |
1340 | mmc->f_max = 24000000; | |
1341 | mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34; | |
1342 | ||
1343 | spin_lock_init(&host->lock); | |
1344 | ||
6e6293dd PO |
1345 | /* |
1346 | * Set up detection timer | |
1347 | */ | |
1348 | init_timer(&host->timer); | |
1349 | host->timer.data = (unsigned long)host; | |
1350 | host->timer.function = wbsd_detect_card; | |
1351 | ||
85bcc130 PO |
1352 | /* |
1353 | * Maximum number of segments. Worst case is one sector per segment | |
1354 | * so this will be 64kB/512. | |
1355 | */ | |
1356 | mmc->max_hw_segs = 128; | |
1357 | mmc->max_phys_segs = 128; | |
1358 | ||
1359 | /* | |
1360 | * Maximum number of sectors in one transfer. Also limited by 64kB | |
1361 | * buffer. | |
1362 | */ | |
1363 | mmc->max_sectors = 128; | |
1364 | ||
1365 | /* | |
1366 | * Maximum segment size. Could be one segment with the maximum number | |
1367 | * of segments. | |
1368 | */ | |
1369 | mmc->max_seg_size = mmc->max_sectors * 512; | |
1370 | ||
1371 | dev_set_drvdata(dev, mmc); | |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | static void __devexit wbsd_free_mmc(struct device* dev) | |
1377 | { | |
1378 | struct mmc_host* mmc; | |
6e6293dd | 1379 | struct wbsd_host* host; |
85bcc130 PO |
1380 | |
1381 | mmc = dev_get_drvdata(dev); | |
1382 | if (!mmc) | |
1383 | return; | |
1384 | ||
6e6293dd PO |
1385 | host = mmc_priv(mmc); |
1386 | BUG_ON(host == NULL); | |
1387 | ||
1388 | del_timer_sync(&host->timer); | |
1389 | ||
85bcc130 PO |
1390 | mmc_free_host(mmc); |
1391 | ||
1392 | dev_set_drvdata(dev, NULL); | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Scan for known chip id:s | |
1397 | */ | |
1398 | ||
1399 | static int __devinit wbsd_scan(struct wbsd_host* host) | |
1da177e4 LT |
1400 | { |
1401 | int i, j, k; | |
1402 | int id; | |
1403 | ||
1404 | /* | |
1405 | * Iterate through all ports, all codes to | |
1406 | * find hardware that is in our known list. | |
1407 | */ | |
1408 | for (i = 0;i < sizeof(config_ports)/sizeof(int);i++) | |
1409 | { | |
1410 | if (!request_region(config_ports[i], 2, DRIVER_NAME)) | |
1411 | continue; | |
1412 | ||
1413 | for (j = 0;j < sizeof(unlock_codes)/sizeof(int);j++) | |
1414 | { | |
1415 | id = 0xFFFF; | |
1416 | ||
1417 | outb(unlock_codes[j], config_ports[i]); | |
1418 | outb(unlock_codes[j], config_ports[i]); | |
1419 | ||
1420 | outb(WBSD_CONF_ID_HI, config_ports[i]); | |
1421 | id = inb(config_ports[i] + 1) << 8; | |
1422 | ||
1423 | outb(WBSD_CONF_ID_LO, config_ports[i]); | |
1424 | id |= inb(config_ports[i] + 1); | |
1425 | ||
1426 | for (k = 0;k < sizeof(valid_ids)/sizeof(int);k++) | |
1427 | { | |
1428 | if (id == valid_ids[k]) | |
1429 | { | |
1430 | host->chip_id = id; | |
1431 | host->config = config_ports[i]; | |
1432 | host->unlock_code = unlock_codes[i]; | |
1433 | ||
1434 | return 0; | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | if (id != 0xFFFF) | |
1439 | { | |
1440 | DBG("Unknown hardware (id %x) found at %x\n", | |
1441 | id, config_ports[i]); | |
1442 | } | |
1443 | ||
1444 | outb(LOCK_CODE, config_ports[i]); | |
1445 | } | |
1446 | ||
1447 | release_region(config_ports[i], 2); | |
1448 | } | |
1449 | ||
1450 | return -ENODEV; | |
1451 | } | |
1452 | ||
85bcc130 PO |
1453 | /* |
1454 | * Allocate/free io port ranges | |
1455 | */ | |
1456 | ||
1457 | static int __devinit wbsd_request_region(struct wbsd_host* host, int base) | |
1da177e4 LT |
1458 | { |
1459 | if (io & 0x7) | |
1460 | return -EINVAL; | |
1461 | ||
85bcc130 | 1462 | if (!request_region(base, 8, DRIVER_NAME)) |
1da177e4 LT |
1463 | return -EIO; |
1464 | ||
1465 | host->base = io; | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
85bcc130 | 1470 | static void __devexit wbsd_release_regions(struct wbsd_host* host) |
1da177e4 LT |
1471 | { |
1472 | if (host->base) | |
1473 | release_region(host->base, 8); | |
85bcc130 PO |
1474 | |
1475 | host->base = 0; | |
1da177e4 LT |
1476 | |
1477 | if (host->config) | |
1478 | release_region(host->config, 2); | |
85bcc130 PO |
1479 | |
1480 | host->config = 0; | |
1da177e4 LT |
1481 | } |
1482 | ||
85bcc130 PO |
1483 | /* |
1484 | * Allocate/free DMA port and buffer | |
1485 | */ | |
1486 | ||
1487 | static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma) | |
1da177e4 | 1488 | { |
1da177e4 LT |
1489 | if (dma < 0) |
1490 | return; | |
1491 | ||
1492 | if (request_dma(dma, DRIVER_NAME)) | |
1493 | goto err; | |
1494 | ||
1495 | /* | |
1496 | * We need to allocate a special buffer in | |
1497 | * order for ISA to be able to DMA to it. | |
1498 | */ | |
85bcc130 | 1499 | host->dma_buffer = kmalloc(WBSD_DMA_SIZE, |
1da177e4 LT |
1500 | GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN); |
1501 | if (!host->dma_buffer) | |
1502 | goto free; | |
1503 | ||
1504 | /* | |
1505 | * Translate the address to a physical address. | |
1506 | */ | |
85bcc130 PO |
1507 | host->dma_addr = dma_map_single(host->mmc->dev, host->dma_buffer, |
1508 | WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); | |
1da177e4 LT |
1509 | |
1510 | /* | |
1511 | * ISA DMA must be aligned on a 64k basis. | |
1512 | */ | |
1513 | if ((host->dma_addr & 0xffff) != 0) | |
1514 | goto kfree; | |
1515 | /* | |
1516 | * ISA cannot access memory above 16 MB. | |
1517 | */ | |
1518 | else if (host->dma_addr >= 0x1000000) | |
1519 | goto kfree; | |
1520 | ||
1521 | host->dma = dma; | |
1522 | ||
1523 | return; | |
1524 | ||
1525 | kfree: | |
1526 | /* | |
1527 | * If we've gotten here then there is some kind of alignment bug | |
1528 | */ | |
1529 | BUG_ON(1); | |
1530 | ||
85bcc130 PO |
1531 | dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE, |
1532 | DMA_BIDIRECTIONAL); | |
1533 | host->dma_addr = (dma_addr_t)NULL; | |
1534 | ||
1da177e4 LT |
1535 | kfree(host->dma_buffer); |
1536 | host->dma_buffer = NULL; | |
1537 | ||
1538 | free: | |
1539 | free_dma(dma); | |
1540 | ||
1541 | err: | |
1542 | printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. " | |
1543 | "Falling back on FIFO.\n", dma); | |
1544 | } | |
1545 | ||
85bcc130 PO |
1546 | static void __devexit wbsd_release_dma(struct wbsd_host* host) |
1547 | { | |
1548 | if (host->dma_addr) | |
1549 | dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE, | |
1550 | DMA_BIDIRECTIONAL); | |
1551 | if (host->dma_buffer) | |
1552 | kfree(host->dma_buffer); | |
1553 | if (host->dma >= 0) | |
1554 | free_dma(host->dma); | |
1555 | ||
1556 | host->dma = -1; | |
1557 | host->dma_buffer = NULL; | |
1558 | host->dma_addr = (dma_addr_t)NULL; | |
1559 | } | |
1da177e4 LT |
1560 | |
1561 | /* | |
85bcc130 | 1562 | * Allocate/free IRQ. |
1da177e4 LT |
1563 | */ |
1564 | ||
85bcc130 | 1565 | static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq) |
1da177e4 | 1566 | { |
1da177e4 LT |
1567 | int ret; |
1568 | ||
1569 | /* | |
85bcc130 | 1570 | * Allocate interrupt. |
1da177e4 | 1571 | */ |
85bcc130 PO |
1572 | |
1573 | ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host); | |
1574 | if (ret) | |
1575 | return ret; | |
1da177e4 | 1576 | |
85bcc130 PO |
1577 | host->irq = irq; |
1578 | ||
1da177e4 | 1579 | /* |
85bcc130 | 1580 | * Set up tasklets. |
1da177e4 | 1581 | */ |
85bcc130 PO |
1582 | tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host); |
1583 | tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, (unsigned long)host); | |
1584 | tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, (unsigned long)host); | |
1585 | tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host); | |
1586 | tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host); | |
1587 | tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host); | |
1588 | ||
1589 | return 0; | |
1590 | } | |
1da177e4 | 1591 | |
85bcc130 PO |
1592 | static void __devexit wbsd_release_irq(struct wbsd_host* host) |
1593 | { | |
1594 | if (!host->irq) | |
1595 | return; | |
1da177e4 | 1596 | |
85bcc130 PO |
1597 | free_irq(host->irq, host); |
1598 | ||
1599 | host->irq = 0; | |
1600 | ||
1601 | tasklet_kill(&host->card_tasklet); | |
1602 | tasklet_kill(&host->fifo_tasklet); | |
1603 | tasklet_kill(&host->crc_tasklet); | |
1604 | tasklet_kill(&host->timeout_tasklet); | |
1605 | tasklet_kill(&host->finish_tasklet); | |
1606 | tasklet_kill(&host->block_tasklet); | |
1607 | } | |
1608 | ||
1609 | /* | |
1610 | * Allocate all resources for the host. | |
1611 | */ | |
1612 | ||
1613 | static int __devinit wbsd_request_resources(struct wbsd_host* host, | |
1614 | int base, int irq, int dma) | |
1615 | { | |
1616 | int ret; | |
1617 | ||
1da177e4 LT |
1618 | /* |
1619 | * Allocate I/O ports. | |
1620 | */ | |
85bcc130 | 1621 | ret = wbsd_request_region(host, base); |
1da177e4 | 1622 | if (ret) |
85bcc130 | 1623 | return ret; |
1da177e4 LT |
1624 | |
1625 | /* | |
85bcc130 | 1626 | * Allocate interrupt. |
1da177e4 | 1627 | */ |
85bcc130 PO |
1628 | ret = wbsd_request_irq(host, irq); |
1629 | if (ret) | |
1630 | return ret; | |
1631 | ||
1632 | /* | |
1633 | * Allocate DMA. | |
1634 | */ | |
1635 | wbsd_request_dma(host, dma); | |
1da177e4 | 1636 | |
85bcc130 PO |
1637 | return 0; |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * Release all resources for the host. | |
1642 | */ | |
1643 | ||
1644 | static void __devexit wbsd_release_resources(struct wbsd_host* host) | |
1645 | { | |
1646 | wbsd_release_dma(host); | |
1647 | wbsd_release_irq(host); | |
1648 | wbsd_release_regions(host); | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * Configure the resources the chip should use. | |
1653 | */ | |
1654 | ||
1655 | static void __devinit wbsd_chip_config(struct wbsd_host* host) | |
1656 | { | |
1657 | /* | |
1658 | * Reset the chip. | |
1659 | */ | |
1660 | wbsd_write_config(host, WBSD_CONF_SWRST, 1); | |
1661 | wbsd_write_config(host, WBSD_CONF_SWRST, 0); | |
1da177e4 LT |
1662 | |
1663 | /* | |
1664 | * Select SD/MMC function. | |
1665 | */ | |
1666 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); | |
1667 | ||
1668 | /* | |
1669 | * Set up card detection. | |
1670 | */ | |
85bcc130 | 1671 | wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11); |
1da177e4 LT |
1672 | |
1673 | /* | |
85bcc130 | 1674 | * Configure chip |
1da177e4 LT |
1675 | */ |
1676 | wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8); | |
1677 | wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff); | |
1da177e4 | 1678 | |
85bcc130 | 1679 | wbsd_write_config(host, WBSD_CONF_IRQ, host->irq); |
1da177e4 | 1680 | |
85bcc130 PO |
1681 | if (host->dma >= 0) |
1682 | wbsd_write_config(host, WBSD_CONF_DRQ, host->dma); | |
1da177e4 LT |
1683 | |
1684 | /* | |
85bcc130 | 1685 | * Enable and power up chip. |
1da177e4 | 1686 | */ |
85bcc130 PO |
1687 | wbsd_write_config(host, WBSD_CONF_ENABLE, 1); |
1688 | wbsd_write_config(host, WBSD_CONF_POWER, 0x20); | |
1689 | } | |
1690 | ||
1691 | /* | |
1692 | * Check that configured resources are correct. | |
1693 | */ | |
1694 | ||
1695 | static int __devinit wbsd_chip_validate(struct wbsd_host* host) | |
1696 | { | |
1697 | int base, irq, dma; | |
1da177e4 LT |
1698 | |
1699 | /* | |
85bcc130 | 1700 | * Select SD/MMC function. |
1da177e4 | 1701 | */ |
85bcc130 | 1702 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); |
1da177e4 LT |
1703 | |
1704 | /* | |
85bcc130 | 1705 | * Read configuration. |
1da177e4 | 1706 | */ |
85bcc130 PO |
1707 | base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8; |
1708 | base |= wbsd_read_config(host, WBSD_CONF_PORT_LO); | |
1da177e4 | 1709 | |
85bcc130 PO |
1710 | irq = wbsd_read_config(host, WBSD_CONF_IRQ); |
1711 | ||
1712 | dma = wbsd_read_config(host, WBSD_CONF_DRQ); | |
1da177e4 LT |
1713 | |
1714 | /* | |
85bcc130 | 1715 | * Validate against given configuration. |
1da177e4 | 1716 | */ |
85bcc130 PO |
1717 | if (base != host->base) |
1718 | return 0; | |
1719 | if (irq != host->irq) | |
1720 | return 0; | |
1721 | if ((dma != host->dma) && (host->dma != -1)) | |
1722 | return 0; | |
1723 | ||
1724 | return 1; | |
1725 | } | |
1726 | ||
1727 | /*****************************************************************************\ | |
1728 | * * | |
1729 | * Devices setup and shutdown * | |
1730 | * * | |
1731 | \*****************************************************************************/ | |
1732 | ||
1733 | static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, | |
1734 | int pnp) | |
1735 | { | |
1736 | struct wbsd_host* host = NULL; | |
1737 | struct mmc_host* mmc = NULL; | |
1738 | int ret; | |
1739 | ||
1740 | ret = wbsd_alloc_mmc(dev); | |
1741 | if (ret) | |
1742 | return ret; | |
1743 | ||
1744 | mmc = dev_get_drvdata(dev); | |
1745 | host = mmc_priv(mmc); | |
1da177e4 LT |
1746 | |
1747 | /* | |
85bcc130 | 1748 | * Scan for hardware. |
1da177e4 | 1749 | */ |
85bcc130 PO |
1750 | ret = wbsd_scan(host); |
1751 | if (ret) | |
1752 | { | |
1753 | if (pnp && (ret == -ENODEV)) | |
1754 | { | |
1755 | printk(KERN_WARNING DRIVER_NAME | |
1756 | ": Unable to confirm device presence. You may " | |
1757 | "experience lock-ups.\n"); | |
1758 | } | |
1759 | else | |
1760 | { | |
1761 | wbsd_free_mmc(dev); | |
1762 | return ret; | |
1763 | } | |
1764 | } | |
1da177e4 LT |
1765 | |
1766 | /* | |
85bcc130 | 1767 | * Request resources. |
1da177e4 | 1768 | */ |
85bcc130 PO |
1769 | ret = wbsd_request_resources(host, io, irq, dma); |
1770 | if (ret) | |
1771 | { | |
1772 | wbsd_release_resources(host); | |
1773 | wbsd_free_mmc(dev); | |
1774 | return ret; | |
1775 | } | |
1da177e4 LT |
1776 | |
1777 | /* | |
85bcc130 | 1778 | * See if chip needs to be configured. |
1da177e4 | 1779 | */ |
85bcc130 PO |
1780 | if (pnp && (host->config != 0)) |
1781 | { | |
1782 | if (!wbsd_chip_validate(host)) | |
1783 | { | |
1784 | printk(KERN_WARNING DRIVER_NAME | |
1785 | ": PnP active but chip not configured! " | |
1786 | "You probably have a buggy BIOS. " | |
1787 | "Configuring chip manually.\n"); | |
1788 | wbsd_chip_config(host); | |
1789 | } | |
1790 | } | |
1791 | else | |
1792 | wbsd_chip_config(host); | |
1da177e4 LT |
1793 | |
1794 | /* | |
1795 | * Power Management stuff. No idea how this works. | |
1796 | * Not tested. | |
1797 | */ | |
1798 | #ifdef CONFIG_PM | |
85bcc130 PO |
1799 | if (host->config) |
1800 | wbsd_write_config(host, WBSD_CONF_PME, 0xA0); | |
1da177e4 | 1801 | #endif |
85bcc130 PO |
1802 | /* |
1803 | * Allow device to initialise itself properly. | |
1804 | */ | |
1805 | mdelay(5); | |
1da177e4 LT |
1806 | |
1807 | /* | |
1808 | * Reset the chip into a known state. | |
1809 | */ | |
1810 | wbsd_init_device(host); | |
1811 | ||
1da177e4 LT |
1812 | mmc_add_host(mmc); |
1813 | ||
85bcc130 PO |
1814 | printk(KERN_INFO "%s: W83L51xD", mmc->host_name); |
1815 | if (host->chip_id != 0) | |
1816 | printk(" id %x", (int)host->chip_id); | |
1817 | printk(" at 0x%x irq %d", (int)host->base, (int)host->irq); | |
1818 | if (host->dma >= 0) | |
1819 | printk(" dma %d", (int)host->dma); | |
1820 | else | |
1821 | printk(" FIFO"); | |
1822 | if (pnp) | |
1823 | printk(" PnP"); | |
1824 | printk("\n"); | |
1da177e4 LT |
1825 | |
1826 | return 0; | |
1da177e4 LT |
1827 | } |
1828 | ||
85bcc130 | 1829 | static void __devexit wbsd_shutdown(struct device* dev, int pnp) |
1da177e4 LT |
1830 | { |
1831 | struct mmc_host* mmc = dev_get_drvdata(dev); | |
1832 | struct wbsd_host* host; | |
1833 | ||
1834 | if (!mmc) | |
85bcc130 | 1835 | return; |
1da177e4 LT |
1836 | |
1837 | host = mmc_priv(mmc); | |
1838 | ||
1da177e4 LT |
1839 | mmc_remove_host(mmc); |
1840 | ||
85bcc130 PO |
1841 | if (!pnp) |
1842 | { | |
1843 | /* | |
1844 | * Power down the SD/MMC function. | |
1845 | */ | |
1846 | wbsd_unlock_config(host); | |
1847 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); | |
1848 | wbsd_write_config(host, WBSD_CONF_ENABLE, 0); | |
1849 | wbsd_lock_config(host); | |
1850 | } | |
1da177e4 | 1851 | |
85bcc130 | 1852 | wbsd_release_resources(host); |
1da177e4 | 1853 | |
85bcc130 PO |
1854 | wbsd_free_mmc(dev); |
1855 | } | |
1da177e4 | 1856 | |
85bcc130 PO |
1857 | /* |
1858 | * Non-PnP | |
1859 | */ | |
1860 | ||
1861 | static int __devinit wbsd_probe(struct device* dev) | |
1862 | { | |
1863 | return wbsd_init(dev, io, irq, dma, 0); | |
1864 | } | |
1865 | ||
1866 | static int __devexit wbsd_remove(struct device* dev) | |
1867 | { | |
1868 | wbsd_shutdown(dev, 0); | |
1869 | ||
1870 | return 0; | |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | * PnP | |
1875 | */ | |
1876 | ||
1877 | #ifdef CONFIG_PNP | |
1878 | ||
1879 | static int __devinit | |
1880 | wbsd_pnp_probe(struct pnp_dev * pnpdev, const struct pnp_device_id *dev_id) | |
1881 | { | |
1882 | int io, irq, dma; | |
1da177e4 | 1883 | |
85bcc130 PO |
1884 | /* |
1885 | * Get resources from PnP layer. | |
1886 | */ | |
1887 | io = pnp_port_start(pnpdev, 0); | |
1888 | irq = pnp_irq(pnpdev, 0); | |
1889 | if (pnp_dma_valid(pnpdev, 0)) | |
1890 | dma = pnp_dma(pnpdev, 0); | |
1891 | else | |
1892 | dma = -1; | |
1da177e4 | 1893 | |
85bcc130 | 1894 | DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma); |
1da177e4 | 1895 | |
85bcc130 PO |
1896 | return wbsd_init(&pnpdev->dev, io, irq, dma, 1); |
1897 | } | |
1da177e4 | 1898 | |
85bcc130 PO |
1899 | static void __devexit wbsd_pnp_remove(struct pnp_dev * dev) |
1900 | { | |
1901 | wbsd_shutdown(&dev->dev, 1); | |
1da177e4 LT |
1902 | } |
1903 | ||
85bcc130 PO |
1904 | #endif /* CONFIG_PNP */ |
1905 | ||
1da177e4 LT |
1906 | /* |
1907 | * Power management | |
1908 | */ | |
1909 | ||
1910 | #ifdef CONFIG_PM | |
e5378ca8 | 1911 | static int wbsd_suspend(struct device *dev, pm_message_t state, u32 level) |
1da177e4 LT |
1912 | { |
1913 | DBGF("Not yet supported\n"); | |
1914 | ||
1915 | return 0; | |
1916 | } | |
1917 | ||
1918 | static int wbsd_resume(struct device *dev, u32 level) | |
1919 | { | |
1920 | DBGF("Not yet supported\n"); | |
1921 | ||
1922 | return 0; | |
1923 | } | |
1924 | #else | |
1925 | #define wbsd_suspend NULL | |
1926 | #define wbsd_resume NULL | |
1927 | #endif | |
1928 | ||
85bcc130 | 1929 | static struct platform_device *wbsd_device; |
1da177e4 LT |
1930 | |
1931 | static struct device_driver wbsd_driver = { | |
1932 | .name = DRIVER_NAME, | |
1933 | .bus = &platform_bus_type, | |
1934 | .probe = wbsd_probe, | |
1935 | .remove = wbsd_remove, | |
1936 | ||
1937 | .suspend = wbsd_suspend, | |
1938 | .resume = wbsd_resume, | |
1939 | }; | |
1940 | ||
85bcc130 PO |
1941 | #ifdef CONFIG_PNP |
1942 | ||
1943 | static struct pnp_driver wbsd_pnp_driver = { | |
1944 | .name = DRIVER_NAME, | |
1945 | .id_table = pnp_dev_table, | |
1946 | .probe = wbsd_pnp_probe, | |
1947 | .remove = wbsd_pnp_remove, | |
1948 | }; | |
1949 | ||
1950 | #endif /* CONFIG_PNP */ | |
1951 | ||
1da177e4 LT |
1952 | /* |
1953 | * Module loading/unloading | |
1954 | */ | |
1955 | ||
1956 | static int __init wbsd_drv_init(void) | |
1957 | { | |
1958 | int result; | |
1959 | ||
1960 | printk(KERN_INFO DRIVER_NAME | |
1961 | ": Winbond W83L51xD SD/MMC card interface driver, " | |
1962 | DRIVER_VERSION "\n"); | |
1963 | printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); | |
1da177e4 | 1964 | |
85bcc130 PO |
1965 | #ifdef CONFIG_PNP |
1966 | ||
1967 | if (!nopnp) | |
1968 | { | |
1969 | result = pnp_register_driver(&wbsd_pnp_driver); | |
1970 | if (result < 0) | |
1971 | return result; | |
1972 | } | |
1973 | ||
1974 | #endif /* CONFIG_PNP */ | |
1975 | ||
1976 | if (nopnp) | |
1977 | { | |
1978 | result = driver_register(&wbsd_driver); | |
1979 | if (result < 0) | |
1980 | return result; | |
1981 | ||
1982 | wbsd_device = platform_device_register_simple(DRIVER_NAME, -1, | |
1983 | NULL, 0); | |
1984 | if (IS_ERR(wbsd_device)) | |
1985 | return PTR_ERR(wbsd_device); | |
1986 | } | |
1da177e4 LT |
1987 | |
1988 | return 0; | |
1989 | } | |
1990 | ||
1991 | static void __exit wbsd_drv_exit(void) | |
1992 | { | |
85bcc130 PO |
1993 | #ifdef CONFIG_PNP |
1994 | ||
1995 | if (!nopnp) | |
1996 | pnp_unregister_driver(&wbsd_pnp_driver); | |
1da177e4 | 1997 | |
85bcc130 PO |
1998 | #endif /* CONFIG_PNP */ |
1999 | ||
2000 | if (nopnp) | |
2001 | { | |
2002 | platform_device_unregister(wbsd_device); | |
2003 | ||
2004 | driver_unregister(&wbsd_driver); | |
2005 | } | |
1da177e4 LT |
2006 | |
2007 | DBG("unloaded\n"); | |
2008 | } | |
2009 | ||
2010 | module_init(wbsd_drv_init); | |
2011 | module_exit(wbsd_drv_exit); | |
85bcc130 PO |
2012 | #ifdef CONFIG_PNP |
2013 | module_param(nopnp, uint, 0444); | |
2014 | #endif | |
1da177e4 LT |
2015 | module_param(io, uint, 0444); |
2016 | module_param(irq, uint, 0444); | |
2017 | module_param(dma, int, 0444); | |
2018 | ||
2019 | MODULE_LICENSE("GPL"); | |
2020 | MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver"); | |
2021 | MODULE_VERSION(DRIVER_VERSION); | |
2022 | ||
85bcc130 PO |
2023 | #ifdef CONFIG_PNP |
2024 | MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)"); | |
2025 | #endif | |
1da177e4 LT |
2026 | MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)"); |
2027 | MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)"); | |
2028 | MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)"); |