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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Pierre Ossman70f10482007-07-11 20:04:50 +02002 * linux/drivers/mmc/host/wbsd.c - Winbond W83L51xD SD/MMC driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Alex Dubov14d836e2007-04-13 19:04:38 +02004 * Copyright (C) 2004-2007 Pierre Ossman, All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
6 * This program is free software; you can redistribute it and/or modify
Pierre Ossman643f7202006-09-30 23:27:52 -07007 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 *
11 *
12 * Warning!
13 *
14 * Changes to the FIFO system should be done with extreme care since
15 * the hardware is full of bugs related to the FIFO. Known issues are:
16 *
17 * - FIFO size field in FSR is always zero.
18 *
19 * - FIFO interrupts tend not to work as they should. Interrupts are
20 * triggered only for full/empty events, not for threshold values.
21 *
22 * - On APIC systems the FIFO empty interrupt is sometimes lost.
23 */
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/init.h>
28#include <linux/ioport.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010029#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/interrupt.h>
Pierre Ossman85bcc132005-05-08 19:35:27 +010031#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/delay.h>
Pierre Ossman85bcc132005-05-08 19:35:27 +010033#include <linux/pnp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/highmem.h>
35#include <linux/mmc/host.h>
Jens Axboebd6dee62007-10-24 09:01:09 +020036#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38#include <asm/io.h>
39#include <asm/dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41#include "wbsd.h"
42
43#define DRIVER_NAME "wbsd"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#define DBG(x...) \
Russell Kingc6563172006-03-29 09:30:20 +010046 pr_debug(DRIVER_NAME ": " x)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define DBGF(f, x...) \
Russell Kingc6563172006-03-29 09:30:20 +010048 pr_debug(DRIVER_NAME " [%s()]: " f, __func__ , ##x)
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Linus Torvalds1da177e2005-04-16 15:20:36 -070050/*
Pierre Ossman85bcc132005-05-08 19:35:27 +010051 * Device resources
52 */
53
54#ifdef CONFIG_PNP
55
56static const struct pnp_device_id pnp_dev_table[] = {
57 { "WEC0517", 0 },
58 { "WEC0518", 0 },
59 { "", 0 },
60};
61
62MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
63
64#endif /* CONFIG_PNP */
65
Adrian Bunk3eee0d02005-07-01 13:07:37 +010066static const int config_ports[] = { 0x2E, 0x4E };
67static const int unlock_codes[] = { 0x83, 0x87 };
68
69static const int valid_ids[] = {
70 0x7112,
71 };
72
Pierre Ossman85bcc132005-05-08 19:35:27 +010073#ifdef CONFIG_PNP
74static unsigned int nopnp = 0;
75#else
76static const unsigned int nopnp = 1;
77#endif
78static unsigned int io = 0x248;
79static unsigned int irq = 6;
80static int dma = 2;
81
82/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 * Basic functions
84 */
85
Pierre Ossmancfa7f522006-01-08 18:17:55 +000086static inline void wbsd_unlock_config(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Pierre Ossman85bcc132005-05-08 19:35:27 +010088 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +010089
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 outb(host->unlock_code, host->config);
91 outb(host->unlock_code, host->config);
92}
93
Pierre Ossmancfa7f522006-01-08 18:17:55 +000094static inline void wbsd_lock_config(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -070095{
Pierre Ossman85bcc132005-05-08 19:35:27 +010096 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +010097
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 outb(LOCK_CODE, host->config);
99}
100
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000101static inline void wbsd_write_config(struct wbsd_host *host, u8 reg, u8 value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102{
Pierre Ossman85bcc132005-05-08 19:35:27 +0100103 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 outb(reg, host->config);
106 outb(value, host->config + 1);
107}
108
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000109static inline u8 wbsd_read_config(struct wbsd_host *host, u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110{
Pierre Ossman85bcc132005-05-08 19:35:27 +0100111 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 outb(reg, host->config);
114 return inb(host->config + 1);
115}
116
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000117static inline void wbsd_write_index(struct wbsd_host *host, u8 index, u8 value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
119 outb(index, host->base + WBSD_IDXR);
120 outb(value, host->base + WBSD_DATAR);
121}
122
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000123static inline u8 wbsd_read_index(struct wbsd_host *host, u8 index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124{
125 outb(index, host->base + WBSD_IDXR);
126 return inb(host->base + WBSD_DATAR);
127}
128
129/*
130 * Common routines
131 */
132
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000133static void wbsd_init_device(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134{
135 u8 setup, ier;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 /*
138 * Reset chip (SD/MMC part) and fifo.
139 */
140 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
141 setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET;
142 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 /*
Pierre Ossman85bcc132005-05-08 19:35:27 +0100145 * Set DAT3 to input
146 */
147 setup &= ~WBSD_DAT3_H;
148 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
149 host->flags &= ~WBSD_FIGNORE_DETECT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100150
Pierre Ossman85bcc132005-05-08 19:35:27 +0100151 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 * Read back default clock.
153 */
154 host->clk = wbsd_read_index(host, WBSD_IDX_CLK);
155
156 /*
157 * Power down port.
158 */
159 outb(WBSD_POWER_N, host->base + WBSD_CSR);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 /*
162 * Set maximum timeout.
163 */
164 wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 /*
Pierre Ossman85bcc132005-05-08 19:35:27 +0100167 * Test for card presence
168 */
169 if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT)
170 host->flags |= WBSD_FCARD_PRESENT;
171 else
172 host->flags &= ~WBSD_FCARD_PRESENT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100173
Pierre Ossman85bcc132005-05-08 19:35:27 +0100174 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 * Enable interesting interrupts.
176 */
177 ier = 0;
178 ier |= WBSD_EINT_CARD;
179 ier |= WBSD_EINT_FIFO_THRE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 ier |= WBSD_EINT_CRC;
Pierre Ossman5721dbf2007-04-13 23:25:59 +0200181 ier |= WBSD_EINT_TIMEOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 ier |= WBSD_EINT_TC;
183
184 outb(ier, host->base + WBSD_EIR);
185
186 /*
187 * Clear interrupts.
188 */
189 inb(host->base + WBSD_ISR);
190}
191
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000192static void wbsd_reset(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193{
194 u8 setup;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100195
Pierre Ossmand1916342005-11-05 10:36:35 +0000196 printk(KERN_ERR "%s: Resetting chip\n", mmc_hostname(host->mmc));
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 /*
199 * Soft reset of chip (SD/MMC part).
200 */
201 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
202 setup |= WBSD_SOFT_RESET;
203 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
204}
205
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000206static void wbsd_request_end(struct wbsd_host *host, struct mmc_request *mrq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
208 unsigned long dmaflags;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100209
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000210 if (host->dma >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 /*
212 * Release ISA DMA controller.
213 */
214 dmaflags = claim_dma_lock();
215 disable_dma(host->dma);
216 clear_dma_ff(host->dma);
217 release_dma_lock(dmaflags);
218
219 /*
220 * Disable DMA on host.
221 */
222 wbsd_write_index(host, WBSD_IDX_DMA, 0);
223 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100224
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 host->mrq = NULL;
226
227 /*
228 * MMC layer might call back into the driver so first unlock.
229 */
230 spin_unlock(&host->lock);
231 mmc_request_done(host->mmc, mrq);
232 spin_lock(&host->lock);
233}
234
235/*
236 * Scatter/gather functions
237 */
238
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000239static inline void wbsd_init_sg(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240{
241 /*
242 * Get info. about SG list from data structure.
243 */
244 host->cur_sg = data->sg;
245 host->num_sg = data->sg_len;
246
247 host->offset = 0;
248 host->remain = host->cur_sg->length;
249}
250
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000251static inline int wbsd_next_sg(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
253 /*
254 * Skip to next SG entry.
255 */
256 host->cur_sg++;
257 host->num_sg--;
258
259 /*
260 * Any entries left?
261 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000262 if (host->num_sg > 0) {
263 host->offset = 0;
264 host->remain = host->cur_sg->length;
265 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 return host->num_sg;
268}
269
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100270static inline char *wbsd_sg_to_buffer(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271{
Jens Axboe45711f12007-10-22 21:19:53 +0200272 return sg_virt(host->cur_sg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273}
274
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000275static inline void wbsd_sg_to_dma(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
Alex Dubov14d836e2007-04-13 19:04:38 +0200277 unsigned int len, i;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000278 struct scatterlist *sg;
279 char *dmabuf = host->dma_buffer;
280 char *sgbuf;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 sg = data->sg;
283 len = data->sg_len;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100284
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000285 for (i = 0; i < len; i++) {
Jens Axboe45711f12007-10-22 21:19:53 +0200286 sgbuf = sg_virt(&sg[i]);
Alex Dubov14d836e2007-04-13 19:04:38 +0200287 memcpy(dmabuf, sgbuf, sg[i].length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 dmabuf += sg[i].length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290}
291
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000292static inline void wbsd_dma_to_sg(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293{
Alex Dubov14d836e2007-04-13 19:04:38 +0200294 unsigned int len, i;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000295 struct scatterlist *sg;
296 char *dmabuf = host->dma_buffer;
297 char *sgbuf;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 sg = data->sg;
300 len = data->sg_len;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100301
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000302 for (i = 0; i < len; i++) {
Jens Axboe45711f12007-10-22 21:19:53 +0200303 sgbuf = sg_virt(&sg[i]);
Alex Dubov14d836e2007-04-13 19:04:38 +0200304 memcpy(sgbuf, dmabuf, sg[i].length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 dmabuf += sg[i].length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
309/*
310 * Command handling
311 */
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100312
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000313static inline void wbsd_get_short_reply(struct wbsd_host *host,
314 struct mmc_command *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315{
316 /*
317 * Correct response type?
318 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000319 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200320 cmd->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 return;
322 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100323
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000324 cmd->resp[0] = wbsd_read_index(host, WBSD_IDX_RESP12) << 24;
325 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP13) << 16;
326 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP14) << 8;
327 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP15) << 0;
328 cmd->resp[1] = wbsd_read_index(host, WBSD_IDX_RESP16) << 24;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000331static inline void wbsd_get_long_reply(struct wbsd_host *host,
332 struct mmc_command *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
334 int i;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 /*
337 * Correct response type?
338 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000339 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200340 cmd->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 return;
342 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100343
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000344 for (i = 0; i < 4; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 cmd->resp[i] =
346 wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24;
347 cmd->resp[i] |=
348 wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16;
349 cmd->resp[i] |=
350 wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8;
351 cmd->resp[i] |=
352 wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0;
353 }
354}
355
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000356static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357{
358 int i;
359 u8 status, isr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 /*
362 * Clear accumulated ISR. The interrupt routine
363 * will fill this one with events that occur during
364 * transfer.
365 */
366 host->isr = 0;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 /*
369 * Send the command (CRC calculated by host).
370 */
371 outb(cmd->opcode, host->base + WBSD_CMDR);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000372 for (i = 3; i >= 0; i--)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100374
Pierre Ossman17b04292007-07-22 22:18:46 +0200375 cmd->error = 0;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 /*
378 * Wait for the request to complete.
379 */
380 do {
381 status = wbsd_read_index(host, WBSD_IDX_STATUS);
382 } while (status & WBSD_CARDTRAFFIC);
383
384 /*
385 * Do we expect a reply?
386 */
Russell Kinge9225172006-02-02 12:23:12 +0000387 if (cmd->flags & MMC_RSP_PRESENT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 /*
389 * Read back status.
390 */
391 isr = host->isr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 /* Card removed? */
394 if (isr & WBSD_INT_CARD)
Pierre Ossman17b04292007-07-22 22:18:46 +0200395 cmd->error = -ENOMEDIUM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 /* Timeout? */
397 else if (isr & WBSD_INT_TIMEOUT)
Pierre Ossman17b04292007-07-22 22:18:46 +0200398 cmd->error = -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 /* CRC? */
400 else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC))
Pierre Ossman17b04292007-07-22 22:18:46 +0200401 cmd->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 /* All ok */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000403 else {
Russell Kinge9225172006-02-02 12:23:12 +0000404 if (cmd->flags & MMC_RSP_136)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 wbsd_get_long_reply(host, cmd);
Russell Kinge9225172006-02-02 12:23:12 +0000406 else
407 wbsd_get_short_reply(host, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 }
409 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410}
411
412/*
413 * Data functions
414 */
415
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000416static void wbsd_empty_fifo(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000418 struct mmc_data *data = host->mrq->cmd->data;
419 char *buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 int i, fsr, fifo;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100421
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 /*
423 * Handle excessive data.
424 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200425 if (host->num_sg == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100427
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100428 buffer = wbsd_sg_to_buffer(host) + host->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430 /*
431 * Drain the fifo. This has a tendency to loop longer
432 * than the FIFO length (usually one block).
433 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000434 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 /*
436 * The size field in the FSR is broken so we have to
437 * do some guessing.
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100438 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 if (fsr & WBSD_FIFO_FULL)
440 fifo = 16;
441 else if (fsr & WBSD_FIFO_FUTHRE)
442 fifo = 8;
443 else
444 fifo = 1;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100445
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000446 for (i = 0; i < fifo; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 *buffer = inb(host->base + WBSD_DFR);
448 buffer++;
449 host->offset++;
450 host->remain--;
451
452 data->bytes_xfered++;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100453
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 * End of scatter list entry?
456 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000457 if (host->remain == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 /*
459 * Get next entry. Check if last.
460 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200461 if (!wbsd_next_sg(host))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100463
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100464 buffer = wbsd_sg_to_buffer(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 }
466 }
467 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 /*
470 * This is a very dirty hack to solve a
471 * hardware problem. The chip doesn't trigger
472 * FIFO threshold interrupts properly.
473 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200474 if ((data->blocks * data->blksz - data->bytes_xfered) < 16)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 tasklet_schedule(&host->fifo_tasklet);
476}
477
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000478static void wbsd_fill_fifo(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000480 struct mmc_data *data = host->mrq->cmd->data;
481 char *buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 int i, fsr, fifo;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100483
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 /*
485 * Check that we aren't being called after the
486 * entire buffer has been transfered.
487 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200488 if (host->num_sg == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 return;
490
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100491 buffer = wbsd_sg_to_buffer(host) + host->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
493 /*
494 * Fill the fifo. This has a tendency to loop longer
495 * than the FIFO length (usually one block).
496 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000497 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /*
499 * The size field in the FSR is broken so we have to
500 * do some guessing.
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100501 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 if (fsr & WBSD_FIFO_EMPTY)
503 fifo = 0;
504 else if (fsr & WBSD_FIFO_EMTHRE)
505 fifo = 8;
506 else
507 fifo = 15;
508
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000509 for (i = 16; i > fifo; i--) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 outb(*buffer, host->base + WBSD_DFR);
511 buffer++;
512 host->offset++;
513 host->remain--;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 data->bytes_xfered++;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100516
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 * End of scatter list entry?
519 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000520 if (host->remain == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 /*
522 * Get next entry. Check if last.
523 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200524 if (!wbsd_next_sg(host))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100526
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100527 buffer = wbsd_sg_to_buffer(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 }
529 }
530 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100531
Pierre Ossman85bcc132005-05-08 19:35:27 +0100532 /*
533 * The controller stops sending interrupts for
534 * 'FIFO empty' under certain conditions. So we
535 * need to be a bit more pro-active.
536 */
537 tasklet_schedule(&host->fifo_tasklet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538}
539
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000540static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541{
542 u16 blksize;
543 u8 setup;
544 unsigned long dmaflags;
Alex Dubov14d836e2007-04-13 19:04:38 +0200545 unsigned int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 /*
548 * Calculate size.
549 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200550 size = data->blocks * data->blksz;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552 /*
553 * Check timeout values for overflow.
554 * (Yes, some cards cause this value to overflow).
555 */
556 if (data->timeout_ns > 127000000)
557 wbsd_write_index(host, WBSD_IDX_TAAC, 127);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000558 else {
559 wbsd_write_index(host, WBSD_IDX_TAAC,
560 data->timeout_ns / 1000000);
561 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100562
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (data->timeout_clks > 255)
564 wbsd_write_index(host, WBSD_IDX_NSAC, 255);
565 else
566 wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100567
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 /*
569 * Inform the chip of how large blocks will be
570 * sent. It needs this to determine when to
571 * calculate CRC.
572 *
573 * Space for CRC must be included in the size.
Pierre Ossman65ae2112005-09-06 15:18:57 -0700574 * Two bytes are needed for each data line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000576 if (host->bus_width == MMC_BUS_WIDTH_1) {
Pavel Pisa2c171bf2006-05-19 21:48:03 +0100577 blksize = data->blksz + 2;
Pierre Ossman65ae2112005-09-06 15:18:57 -0700578
579 wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0);
580 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000581 } else if (host->bus_width == MMC_BUS_WIDTH_4) {
Pavel Pisa2c171bf2006-05-19 21:48:03 +0100582 blksize = data->blksz + 2 * 4;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100583
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000584 wbsd_write_index(host, WBSD_IDX_PBSMSB,
585 ((blksize >> 4) & 0xF0) | WBSD_DATA_WIDTH);
Pierre Ossman65ae2112005-09-06 15:18:57 -0700586 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000587 } else {
Pierre Ossman17b04292007-07-22 22:18:46 +0200588 data->error = -EINVAL;
Pierre Ossman65ae2112005-09-06 15:18:57 -0700589 return;
590 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
592 /*
593 * Clear the FIFO. This is needed even for DMA
594 * transfers since the chip still uses the FIFO
595 * internally.
596 */
597 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
598 setup |= WBSD_FIFO_RESET;
599 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 /*
602 * DMA transfer?
603 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000604 if (host->dma >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 /*
606 * The buffer for DMA is only 64 kB.
607 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200608 BUG_ON(size > 0x10000);
609 if (size > 0x10000) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200610 data->error = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 return;
612 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100613
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 /*
615 * Transfer data from the SG list to
616 * the DMA buffer.
617 */
618 if (data->flags & MMC_DATA_WRITE)
619 wbsd_sg_to_dma(host, data);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100620
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 /*
622 * Initialise the ISA DMA controller.
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100623 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 dmaflags = claim_dma_lock();
625 disable_dma(host->dma);
626 clear_dma_ff(host->dma);
627 if (data->flags & MMC_DATA_READ)
628 set_dma_mode(host->dma, DMA_MODE_READ & ~0x40);
629 else
630 set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40);
631 set_dma_addr(host->dma, host->dma_addr);
Alex Dubov14d836e2007-04-13 19:04:38 +0200632 set_dma_count(host->dma, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634 enable_dma(host->dma);
635 release_dma_lock(dmaflags);
636
637 /*
638 * Enable DMA on the host.
639 */
640 wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000641 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 /*
643 * This flag is used to keep printk
644 * output to a minimum.
645 */
646 host->firsterr = 1;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 /*
649 * Initialise the SG list.
650 */
651 wbsd_init_sg(host, data);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 /*
654 * Turn off DMA.
655 */
656 wbsd_write_index(host, WBSD_IDX_DMA, 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 /*
659 * Set up FIFO threshold levels (and fill
660 * buffer if doing a write).
661 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000662 if (data->flags & MMC_DATA_READ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 wbsd_write_index(host, WBSD_IDX_FIFOEN,
664 WBSD_FIFOEN_FULL | 8);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000665 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 wbsd_write_index(host, WBSD_IDX_FIFOEN,
667 WBSD_FIFOEN_EMPTY | 8);
668 wbsd_fill_fifo(host);
669 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100670 }
671
Pierre Ossman17b04292007-07-22 22:18:46 +0200672 data->error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673}
674
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000675static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676{
677 unsigned long dmaflags;
678 int count;
679 u8 status;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100680
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 WARN_ON(host->mrq == NULL);
682
683 /*
684 * Send a stop command if needed.
685 */
686 if (data->stop)
687 wbsd_send_command(host, data->stop);
688
689 /*
690 * Wait for the controller to leave data
691 * transfer state.
692 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000693 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 status = wbsd_read_index(host, WBSD_IDX_STATUS);
695 } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE));
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100696
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 /*
698 * DMA transfer?
699 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000700 if (host->dma >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 /*
702 * Disable DMA on the host.
703 */
704 wbsd_write_index(host, WBSD_IDX_DMA, 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 /*
707 * Turn of ISA DMA controller.
708 */
709 dmaflags = claim_dma_lock();
710 disable_dma(host->dma);
711 clear_dma_ff(host->dma);
712 count = get_dma_residue(host->dma);
713 release_dma_lock(dmaflags);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100714
Alex Dubov14d836e2007-04-13 19:04:38 +0200715 data->bytes_xfered = host->mrq->data->blocks *
716 host->mrq->data->blksz - count;
717 data->bytes_xfered -= data->bytes_xfered % data->blksz;
718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 /*
720 * Any leftover data?
721 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000722 if (count) {
Pierre Ossmand1916342005-11-05 10:36:35 +0000723 printk(KERN_ERR "%s: Incomplete DMA transfer. "
724 "%d bytes left.\n",
725 mmc_hostname(host->mmc), count);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100726
Pierre Ossman17b04292007-07-22 22:18:46 +0200727 if (!data->error)
728 data->error = -EIO;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000729 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 /*
731 * Transfer data from DMA buffer to
732 * SG list.
733 */
734 if (data->flags & MMC_DATA_READ)
735 wbsd_dma_to_sg(host, data);
Alex Dubov14d836e2007-04-13 19:04:38 +0200736 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100737
Pierre Ossman17b04292007-07-22 22:18:46 +0200738 if (data->error) {
Alex Dubov14d836e2007-04-13 19:04:38 +0200739 if (data->bytes_xfered)
740 data->bytes_xfered -= data->blksz;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 }
742 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100743
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 wbsd_request_end(host, host->mrq);
745}
746
Pierre Ossman85bcc132005-05-08 19:35:27 +0100747/*****************************************************************************\
748 * *
749 * MMC layer callbacks *
750 * *
751\*****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000753static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000755 struct wbsd_host *host = mmc_priv(mmc);
756 struct mmc_command *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
758 /*
759 * Disable tasklets to avoid a deadlock.
760 */
761 spin_lock_bh(&host->lock);
762
763 BUG_ON(host->mrq != NULL);
764
765 cmd = mrq->cmd;
766
767 host->mrq = mrq;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 /*
Pierre Ossman17b04292007-07-22 22:18:46 +0200770 * Check that there is actually a card in the slot.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000772 if (!(host->flags & WBSD_FCARD_PRESENT)) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200773 cmd->error = -ENOMEDIUM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 goto done;
775 }
776
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000777 if (cmd->data) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 /*
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100779 * The hardware is so delightfully stupid that it has a list
780 * of "data" commands. If a command isn't on this list, it'll
781 * just go back to the idle state and won't send any data
782 * interrupts.
783 */
784 switch (cmd->opcode) {
785 case 11:
786 case 17:
787 case 18:
788 case 20:
789 case 24:
790 case 25:
791 case 26:
792 case 27:
793 case 30:
794 case 42:
795 case 56:
796 break;
797
798 /* ACMDs. We don't keep track of state, so we just treat them
799 * like any other command. */
800 case 51:
801 break;
802
803 default:
804#ifdef CONFIG_MMC_DEBUG
805 printk(KERN_WARNING "%s: Data command %d is not "
806 "supported by this controller.\n",
807 mmc_hostname(host->mmc), cmd->opcode);
808#endif
Pierre Ossman17b04292007-07-22 22:18:46 +0200809 cmd->error = -EINVAL;
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100810
811 goto done;
812 };
Pierre Ossmanb2670b12007-05-01 13:35:19 +0200813 }
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100814
Pierre Ossmanb2670b12007-05-01 13:35:19 +0200815 /*
816 * Does the request include data?
817 */
818 if (cmd->data) {
819 wbsd_prepare_data(host, cmd->data);
820
Pierre Ossman17b04292007-07-22 22:18:46 +0200821 if (cmd->data->error)
Pierre Ossmanb2670b12007-05-01 13:35:19 +0200822 goto done;
823 }
824
825 wbsd_send_command(host, cmd);
826
827 /*
828 * If this is a data transfer the request
829 * will be finished after the data has
830 * transfered.
831 */
Pierre Ossman17b04292007-07-22 22:18:46 +0200832 if (cmd->data && !cmd->error) {
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100833 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 * Dirty fix for hardware bug.
835 */
836 if (host->dma == -1)
837 tasklet_schedule(&host->fifo_tasklet);
838
839 spin_unlock_bh(&host->lock);
840
841 return;
842 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844done:
845 wbsd_request_end(host, mrq);
846
847 spin_unlock_bh(&host->lock);
848}
849
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000850static void wbsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000852 struct wbsd_host *host = mmc_priv(mmc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 u8 clk, setup, pwr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100854
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 spin_lock_bh(&host->lock);
856
857 /*
858 * Reset the chip on each power off.
859 * Should clear out any weird states.
860 */
861 if (ios->power_mode == MMC_POWER_OFF)
862 wbsd_init_device(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 if (ios->clock >= 24000000)
865 clk = WBSD_CLK_24M;
866 else if (ios->clock >= 16000000)
867 clk = WBSD_CLK_16M;
868 else if (ios->clock >= 12000000)
869 clk = WBSD_CLK_12M;
870 else
871 clk = WBSD_CLK_375K;
872
873 /*
874 * Only write to the clock register when
875 * there is an actual change.
876 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000877 if (clk != host->clk) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 wbsd_write_index(host, WBSD_IDX_CLK, clk);
879 host->clk = clk;
880 }
881
Pierre Ossman85bcc132005-05-08 19:35:27 +0100882 /*
883 * Power up card.
884 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000885 if (ios->power_mode != MMC_POWER_OFF) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 pwr = inb(host->base + WBSD_CSR);
887 pwr &= ~WBSD_POWER_N;
888 outb(pwr, host->base + WBSD_CSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 }
890
Pierre Ossman85bcc132005-05-08 19:35:27 +0100891 /*
892 * MMC cards need to have pin 1 high during init.
Pierre Ossman85bcc132005-05-08 19:35:27 +0100893 * It wreaks havoc with the card detection though so
Pierre Ossman1656fa52005-09-03 16:45:49 +0100894 * that needs to be disabled.
Pierre Ossman85bcc132005-05-08 19:35:27 +0100895 */
896 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000897 if (ios->chip_select == MMC_CS_HIGH) {
Pierre Ossman65ae2112005-09-06 15:18:57 -0700898 BUG_ON(ios->bus_width != MMC_BUS_WIDTH_1);
Pierre Ossman85bcc132005-05-08 19:35:27 +0100899 setup |= WBSD_DAT3_H;
900 host->flags |= WBSD_FIGNORE_DETECT;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000901 } else {
902 if (setup & WBSD_DAT3_H) {
Pierre Ossman19c1f3c2005-10-28 21:37:29 +0100903 setup &= ~WBSD_DAT3_H;
Pierre Ossman1656fa52005-09-03 16:45:49 +0100904
Pierre Ossman19c1f3c2005-10-28 21:37:29 +0100905 /*
906 * We cannot resume card detection immediatly
907 * because of capacitance and delays in the chip.
908 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000909 mod_timer(&host->ignore_timer, jiffies + HZ / 100);
Pierre Ossman19c1f3c2005-10-28 21:37:29 +0100910 }
Pierre Ossman85bcc132005-05-08 19:35:27 +0100911 }
912 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100913
Pierre Ossman65ae2112005-09-06 15:18:57 -0700914 /*
915 * Store bus width for later. Will be used when
916 * setting up the data transfer.
917 */
918 host->bus_width = ios->bus_width;
919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 spin_unlock_bh(&host->lock);
921}
922
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000923static int wbsd_get_ro(struct mmc_host *mmc)
Pierre Ossman65ae2112005-09-06 15:18:57 -0700924{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000925 struct wbsd_host *host = mmc_priv(mmc);
Pierre Ossman65ae2112005-09-06 15:18:57 -0700926 u8 csr;
927
928 spin_lock_bh(&host->lock);
929
930 csr = inb(host->base + WBSD_CSR);
931 csr |= WBSD_MSLED;
932 outb(csr, host->base + WBSD_CSR);
933
934 mdelay(1);
935
936 csr = inb(host->base + WBSD_CSR);
937 csr &= ~WBSD_MSLED;
938 outb(csr, host->base + WBSD_CSR);
939
940 spin_unlock_bh(&host->lock);
941
942 return csr & WBSD_WRPT;
943}
944
David Brownellab7aefd2006-11-12 17:55:30 -0800945static const struct mmc_host_ops wbsd_ops = {
Pierre Ossman85bcc132005-05-08 19:35:27 +0100946 .request = wbsd_request,
947 .set_ios = wbsd_set_ios,
Pierre Ossman65ae2112005-09-06 15:18:57 -0700948 .get_ro = wbsd_get_ro,
Pierre Ossman85bcc132005-05-08 19:35:27 +0100949};
950
951/*****************************************************************************\
952 * *
953 * Interrupt handling *
954 * *
955\*****************************************************************************/
956
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957/*
Pierre Ossman1656fa52005-09-03 16:45:49 +0100958 * Helper function to reset detection ignore
959 */
960
961static void wbsd_reset_ignore(unsigned long data)
962{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000963 struct wbsd_host *host = (struct wbsd_host *)data;
Pierre Ossman1656fa52005-09-03 16:45:49 +0100964
965 BUG_ON(host == NULL);
966
967 DBG("Resetting card detection ignore\n");
968
969 spin_lock_bh(&host->lock);
970
971 host->flags &= ~WBSD_FIGNORE_DETECT;
972
973 /*
974 * Card status might have changed during the
975 * blackout.
976 */
977 tasklet_schedule(&host->card_tasklet);
978
979 spin_unlock_bh(&host->lock);
980}
981
982/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 * Tasklets
984 */
985
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000986static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987{
988 WARN_ON(!host->mrq);
989 if (!host->mrq)
990 return NULL;
991
992 WARN_ON(!host->mrq->cmd);
993 if (!host->mrq->cmd)
994 return NULL;
995
996 WARN_ON(!host->mrq->cmd->data);
997 if (!host->mrq->cmd->data)
998 return NULL;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 return host->mrq->cmd->data;
1001}
1002
1003static void wbsd_tasklet_card(unsigned long param)
1004{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001005 struct wbsd_host *host = (struct wbsd_host *)param;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 u8 csr;
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001007 int delay = -1;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001008
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001010
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001011 if (host->flags & WBSD_FIGNORE_DETECT) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001012 spin_unlock(&host->lock);
1013 return;
1014 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001015
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 csr = inb(host->base + WBSD_CSR);
1017 WARN_ON(csr == 0xff);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001018
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001019 if (csr & WBSD_CARDPRESENT) {
1020 if (!(host->flags & WBSD_FCARD_PRESENT)) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001021 DBG("Card inserted\n");
1022 host->flags |= WBSD_FCARD_PRESENT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001023
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001024 delay = 500;
Pierre Ossman85bcc132005-05-08 19:35:27 +01001025 }
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001026 } else if (host->flags & WBSD_FCARD_PRESENT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 DBG("Card removed\n");
Pierre Ossman85bcc132005-05-08 19:35:27 +01001028 host->flags &= ~WBSD_FCARD_PRESENT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001029
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001030 if (host->mrq) {
Pierre Ossmand1916342005-11-05 10:36:35 +00001031 printk(KERN_ERR "%s: Card removed during transfer!\n",
1032 mmc_hostname(host->mmc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 wbsd_reset(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001034
Pierre Ossman17b04292007-07-22 22:18:46 +02001035 host->mrq->cmd->error = -ENOMEDIUM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 tasklet_schedule(&host->finish_tasklet);
1037 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001038
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001039 delay = 0;
Pierre Ossman6e6293d2005-07-01 12:13:55 +01001040 }
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001041
1042 /*
1043 * Unlock first since we might get a call back.
1044 */
1045
1046 spin_unlock(&host->lock);
1047
1048 if (delay != -1)
1049 mmc_detect_change(host->mmc, msecs_to_jiffies(delay));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050}
1051
1052static void wbsd_tasklet_fifo(unsigned long param)
1053{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001054 struct wbsd_host *host = (struct wbsd_host *)param;
1055 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001056
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001058
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 if (!host->mrq)
1060 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001061
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 data = wbsd_get_data(host);
1063 if (!data)
1064 goto end;
1065
1066 if (data->flags & MMC_DATA_WRITE)
1067 wbsd_fill_fifo(host);
1068 else
1069 wbsd_empty_fifo(host);
1070
1071 /*
1072 * Done?
1073 */
Alex Dubov14d836e2007-04-13 19:04:38 +02001074 if (host->num_sg == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 wbsd_write_index(host, WBSD_IDX_FIFOEN, 0);
1076 tasklet_schedule(&host->finish_tasklet);
1077 }
1078
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001079end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 spin_unlock(&host->lock);
1081}
1082
1083static void wbsd_tasklet_crc(unsigned long param)
1084{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001085 struct wbsd_host *host = (struct wbsd_host *)param;
1086 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001087
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001089
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 if (!host->mrq)
1091 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001092
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 data = wbsd_get_data(host);
1094 if (!data)
1095 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001096
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 DBGF("CRC error\n");
1098
Pierre Ossman17b04292007-07-22 22:18:46 +02001099 data->error = -EILSEQ;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 tasklet_schedule(&host->finish_tasklet);
1102
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001103end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 spin_unlock(&host->lock);
1105}
1106
1107static void wbsd_tasklet_timeout(unsigned long param)
1108{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001109 struct wbsd_host *host = (struct wbsd_host *)param;
1110 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001111
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001113
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 if (!host->mrq)
1115 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001116
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 data = wbsd_get_data(host);
1118 if (!data)
1119 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001120
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 DBGF("Timeout\n");
1122
Pierre Ossman17b04292007-07-22 22:18:46 +02001123 data->error = -ETIMEDOUT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001124
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 tasklet_schedule(&host->finish_tasklet);
1126
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001127end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 spin_unlock(&host->lock);
1129}
1130
1131static void wbsd_tasklet_finish(unsigned long param)
1132{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001133 struct wbsd_host *host = (struct wbsd_host *)param;
1134 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001135
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 WARN_ON(!host->mrq);
1139 if (!host->mrq)
1140 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001141
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 data = wbsd_get_data(host);
1143 if (!data)
1144 goto end;
1145
1146 wbsd_finish_data(host, data);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001147
1148end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 spin_unlock(&host->lock);
1150}
1151
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152/*
1153 * Interrupt handling
1154 */
1155
David Howells7d12e782006-10-05 14:55:46 +01001156static irqreturn_t wbsd_irq(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001158 struct wbsd_host *host = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 int isr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001160
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 isr = inb(host->base + WBSD_ISR);
1162
1163 /*
1164 * Was it actually our hardware that caused the interrupt?
1165 */
1166 if (isr == 0xff || isr == 0x00)
1167 return IRQ_NONE;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001168
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 host->isr |= isr;
1170
1171 /*
1172 * Schedule tasklets as needed.
1173 */
1174 if (isr & WBSD_INT_CARD)
1175 tasklet_schedule(&host->card_tasklet);
1176 if (isr & WBSD_INT_FIFO_THRE)
1177 tasklet_schedule(&host->fifo_tasklet);
1178 if (isr & WBSD_INT_CRC)
1179 tasklet_hi_schedule(&host->crc_tasklet);
1180 if (isr & WBSD_INT_TIMEOUT)
1181 tasklet_hi_schedule(&host->timeout_tasklet);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 if (isr & WBSD_INT_TC)
1183 tasklet_schedule(&host->finish_tasklet);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001184
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 return IRQ_HANDLED;
1186}
1187
Pierre Ossman85bcc132005-05-08 19:35:27 +01001188/*****************************************************************************\
1189 * *
1190 * Device initialisation and shutdown *
1191 * *
1192\*****************************************************************************/
1193
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194/*
Pierre Ossman85bcc132005-05-08 19:35:27 +01001195 * Allocate/free MMC structure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 */
1197
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001198static int __devinit wbsd_alloc_mmc(struct device *dev)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001199{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001200 struct mmc_host *mmc;
1201 struct wbsd_host *host;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001202
Pierre Ossman85bcc132005-05-08 19:35:27 +01001203 /*
1204 * Allocate MMC structure.
1205 */
1206 mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev);
1207 if (!mmc)
1208 return -ENOMEM;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001209
Pierre Ossman85bcc132005-05-08 19:35:27 +01001210 host = mmc_priv(mmc);
1211 host->mmc = mmc;
1212
1213 host->dma = -1;
1214
1215 /*
1216 * Set host parameters.
1217 */
1218 mmc->ops = &wbsd_ops;
1219 mmc->f_min = 375000;
1220 mmc->f_max = 24000000;
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001221 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
Pierre Ossman255d01a2007-07-24 20:38:53 +02001222 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001223
Pierre Ossman85bcc132005-05-08 19:35:27 +01001224 spin_lock_init(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001225
Pierre Ossman85bcc132005-05-08 19:35:27 +01001226 /*
Pierre Ossman1656fa52005-09-03 16:45:49 +01001227 * Set up timers
Pierre Ossman6e6293d2005-07-01 12:13:55 +01001228 */
Pierre Ossman1656fa52005-09-03 16:45:49 +01001229 init_timer(&host->ignore_timer);
1230 host->ignore_timer.data = (unsigned long)host;
1231 host->ignore_timer.function = wbsd_reset_ignore;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001232
Pierre Ossman6e6293d2005-07-01 12:13:55 +01001233 /*
Pierre Ossman85bcc132005-05-08 19:35:27 +01001234 * Maximum number of segments. Worst case is one sector per segment
1235 * so this will be 64kB/512.
1236 */
1237 mmc->max_hw_segs = 128;
1238 mmc->max_phys_segs = 128;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001239
Pierre Ossman85bcc132005-05-08 19:35:27 +01001240 /*
Pierre Ossman55db8902006-11-21 17:55:45 +01001241 * Maximum request size. Also limited by 64KiB buffer.
Pierre Ossman85bcc132005-05-08 19:35:27 +01001242 */
Pierre Ossman55db8902006-11-21 17:55:45 +01001243 mmc->max_req_size = 65536;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001244
Pierre Ossman85bcc132005-05-08 19:35:27 +01001245 /*
1246 * Maximum segment size. Could be one segment with the maximum number
Pierre Ossman55db8902006-11-21 17:55:45 +01001247 * of bytes.
Pierre Ossman85bcc132005-05-08 19:35:27 +01001248 */
Pierre Ossman55db8902006-11-21 17:55:45 +01001249 mmc->max_seg_size = mmc->max_req_size;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001250
Pierre Ossmanfe4a3c72006-11-21 17:54:23 +01001251 /*
1252 * Maximum block size. We have 12 bits (= 4095) but have to subtract
1253 * space for CRC. So the maximum is 4095 - 4*2 = 4087.
1254 */
1255 mmc->max_blk_size = 4087;
1256
Pierre Ossman55db8902006-11-21 17:55:45 +01001257 /*
1258 * Maximum block count. There is no real limit so the maximum
1259 * request size will be the only restriction.
1260 */
1261 mmc->max_blk_count = mmc->max_req_size;
1262
Pierre Ossman85bcc132005-05-08 19:35:27 +01001263 dev_set_drvdata(dev, mmc);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001264
Pierre Ossman85bcc132005-05-08 19:35:27 +01001265 return 0;
1266}
1267
Gabriel Cb3627bb2007-08-02 20:20:44 +02001268static void wbsd_free_mmc(struct device *dev)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001269{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001270 struct mmc_host *mmc;
1271 struct wbsd_host *host;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001272
Pierre Ossman85bcc132005-05-08 19:35:27 +01001273 mmc = dev_get_drvdata(dev);
1274 if (!mmc)
1275 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001276
Pierre Ossman6e6293d2005-07-01 12:13:55 +01001277 host = mmc_priv(mmc);
1278 BUG_ON(host == NULL);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001279
Pierre Ossman1656fa52005-09-03 16:45:49 +01001280 del_timer_sync(&host->ignore_timer);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001281
Pierre Ossman85bcc132005-05-08 19:35:27 +01001282 mmc_free_host(mmc);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001283
Pierre Ossman85bcc132005-05-08 19:35:27 +01001284 dev_set_drvdata(dev, NULL);
1285}
1286
1287/*
1288 * Scan for known chip id:s
1289 */
1290
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001291static int __devinit wbsd_scan(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292{
1293 int i, j, k;
1294 int id;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001295
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 /*
1297 * Iterate through all ports, all codes to
1298 * find hardware that is in our known list.
1299 */
Dmitry Torokhov63648fb2006-01-03 22:56:56 +00001300 for (i = 0; i < ARRAY_SIZE(config_ports); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 if (!request_region(config_ports[i], 2, DRIVER_NAME))
1302 continue;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001303
Dmitry Torokhov63648fb2006-01-03 22:56:56 +00001304 for (j = 0; j < ARRAY_SIZE(unlock_codes); j++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 id = 0xFFFF;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001306
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001307 host->config = config_ports[i];
1308 host->unlock_code = unlock_codes[j];
1309
1310 wbsd_unlock_config(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001311
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 outb(WBSD_CONF_ID_HI, config_ports[i]);
1313 id = inb(config_ports[i] + 1) << 8;
1314
1315 outb(WBSD_CONF_ID_LO, config_ports[i]);
1316 id |= inb(config_ports[i] + 1);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001317
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001318 wbsd_lock_config(host);
1319
Dmitry Torokhov63648fb2006-01-03 22:56:56 +00001320 for (k = 0; k < ARRAY_SIZE(valid_ids); k++) {
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001321 if (id == valid_ids[k]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 host->chip_id = id;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001323
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 return 0;
1325 }
1326 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001327
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001328 if (id != 0xFFFF) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 DBG("Unknown hardware (id %x) found at %x\n",
1330 id, config_ports[i]);
1331 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001333
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 release_region(config_ports[i], 2);
1335 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001336
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001337 host->config = 0;
1338 host->unlock_code = 0;
1339
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 return -ENODEV;
1341}
1342
Pierre Ossman85bcc132005-05-08 19:35:27 +01001343/*
1344 * Allocate/free io port ranges
1345 */
1346
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001347static int __devinit wbsd_request_region(struct wbsd_host *host, int base)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348{
Pierre Ossman916f3ac2006-08-06 22:22:23 +02001349 if (base & 0x7)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 return -EINVAL;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001351
Pierre Ossman85bcc132005-05-08 19:35:27 +01001352 if (!request_region(base, 8, DRIVER_NAME))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 return -EIO;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001354
Pierre Ossman916f3ac2006-08-06 22:22:23 +02001355 host->base = base;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001356
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 return 0;
1358}
1359
Gabriel Cb3627bb2007-08-02 20:20:44 +02001360static void wbsd_release_regions(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361{
1362 if (host->base)
1363 release_region(host->base, 8);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001364
Pierre Ossman85bcc132005-05-08 19:35:27 +01001365 host->base = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366
1367 if (host->config)
1368 release_region(host->config, 2);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001369
Pierre Ossman85bcc132005-05-08 19:35:27 +01001370 host->config = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371}
1372
Pierre Ossman85bcc132005-05-08 19:35:27 +01001373/*
1374 * Allocate/free DMA port and buffer
1375 */
1376
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001377static void __devinit wbsd_request_dma(struct wbsd_host *host, int dma)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 if (dma < 0)
1380 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001381
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 if (request_dma(dma, DRIVER_NAME))
1383 goto err;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001384
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 /*
1386 * We need to allocate a special buffer in
1387 * order for ISA to be able to DMA to it.
1388 */
Pierre Ossman85bcc132005-05-08 19:35:27 +01001389 host->dma_buffer = kmalloc(WBSD_DMA_SIZE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN);
1391 if (!host->dma_buffer)
1392 goto free;
1393
1394 /*
1395 * Translate the address to a physical address.
1396 */
Greg Kroah-Hartmanfcaf71f2006-09-12 17:00:10 +02001397 host->dma_addr = dma_map_single(mmc_dev(host->mmc), host->dma_buffer,
Pierre Ossman85bcc132005-05-08 19:35:27 +01001398 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001399
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 /*
1401 * ISA DMA must be aligned on a 64k basis.
1402 */
1403 if ((host->dma_addr & 0xffff) != 0)
1404 goto kfree;
1405 /*
1406 * ISA cannot access memory above 16 MB.
1407 */
1408 else if (host->dma_addr >= 0x1000000)
1409 goto kfree;
1410
1411 host->dma = dma;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001412
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001414
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415kfree:
1416 /*
1417 * If we've gotten here then there is some kind of alignment bug
1418 */
1419 BUG_ON(1);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001420
Greg Kroah-Hartmanfcaf71f2006-09-12 17:00:10 +02001421 dma_unmap_single(mmc_dev(host->mmc), host->dma_addr,
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001422 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001423 host->dma_addr = (dma_addr_t)NULL;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001424
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 kfree(host->dma_buffer);
1426 host->dma_buffer = NULL;
1427
1428free:
1429 free_dma(dma);
1430
1431err:
1432 printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. "
1433 "Falling back on FIFO.\n", dma);
1434}
1435
Gabriel Cb3627bb2007-08-02 20:20:44 +02001436static void wbsd_release_dma(struct wbsd_host *host)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001437{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001438 if (host->dma_addr) {
Greg Kroah-Hartmanfcaf71f2006-09-12 17:00:10 +02001439 dma_unmap_single(mmc_dev(host->mmc), host->dma_addr,
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001440 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
1441 }
Jesper Juhl6044ec82005-11-07 01:01:32 -08001442 kfree(host->dma_buffer);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001443 if (host->dma >= 0)
1444 free_dma(host->dma);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001445
Pierre Ossman85bcc132005-05-08 19:35:27 +01001446 host->dma = -1;
1447 host->dma_buffer = NULL;
1448 host->dma_addr = (dma_addr_t)NULL;
1449}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
1451/*
Pierre Ossman85bcc132005-05-08 19:35:27 +01001452 * Allocate/free IRQ.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 */
1454
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001455static int __devinit wbsd_request_irq(struct wbsd_host *host, int irq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 int ret;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001458
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 /*
Chuck Ebbertcef33402008-06-12 15:21:42 -07001460 * Set up tasklets. Must be done before requesting interrupt.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001462 tasklet_init(&host->card_tasklet, wbsd_tasklet_card,
1463 (unsigned long)host);
1464 tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo,
1465 (unsigned long)host);
1466 tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc,
1467 (unsigned long)host);
1468 tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout,
1469 (unsigned long)host);
1470 tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish,
1471 (unsigned long)host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001472
Chuck Ebbertcef33402008-06-12 15:21:42 -07001473 /*
1474 * Allocate interrupt.
1475 */
1476 ret = request_irq(irq, wbsd_irq, IRQF_SHARED, DRIVER_NAME, host);
1477 if (ret)
1478 return ret;
1479
1480 host->irq = irq;
1481
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483}
1484
Gabriel Cb3627bb2007-08-02 20:20:44 +02001485static void wbsd_release_irq(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486{
Pierre Ossman85bcc132005-05-08 19:35:27 +01001487 if (!host->irq)
1488 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
1490 free_irq(host->irq, host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001491
Pierre Ossman85bcc132005-05-08 19:35:27 +01001492 host->irq = 0;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001493
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 tasklet_kill(&host->card_tasklet);
1495 tasklet_kill(&host->fifo_tasklet);
1496 tasklet_kill(&host->crc_tasklet);
1497 tasklet_kill(&host->timeout_tasklet);
1498 tasklet_kill(&host->finish_tasklet);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001499}
1500
1501/*
1502 * Allocate all resources for the host.
1503 */
1504
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001505static int __devinit wbsd_request_resources(struct wbsd_host *host,
Pierre Ossman85bcc132005-05-08 19:35:27 +01001506 int base, int irq, int dma)
1507{
1508 int ret;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001509
Pierre Ossman85bcc132005-05-08 19:35:27 +01001510 /*
1511 * Allocate I/O ports.
1512 */
1513 ret = wbsd_request_region(host, base);
1514 if (ret)
1515 return ret;
1516
1517 /*
1518 * Allocate interrupt.
1519 */
1520 ret = wbsd_request_irq(host, irq);
1521 if (ret)
1522 return ret;
1523
1524 /*
1525 * Allocate DMA.
1526 */
1527 wbsd_request_dma(host, dma);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001528
Pierre Ossman85bcc132005-05-08 19:35:27 +01001529 return 0;
1530}
1531
1532/*
1533 * Release all resources for the host.
1534 */
1535
Gabriel Cb3627bb2007-08-02 20:20:44 +02001536static void wbsd_release_resources(struct wbsd_host *host)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001537{
1538 wbsd_release_dma(host);
1539 wbsd_release_irq(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 wbsd_release_regions(host);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001541}
1542
1543/*
1544 * Configure the resources the chip should use.
1545 */
1546
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001547static void wbsd_chip_config(struct wbsd_host *host)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001548{
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001549 wbsd_unlock_config(host);
1550
Pierre Ossman85bcc132005-05-08 19:35:27 +01001551 /*
1552 * Reset the chip.
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001553 */
Pierre Ossman85bcc132005-05-08 19:35:27 +01001554 wbsd_write_config(host, WBSD_CONF_SWRST, 1);
1555 wbsd_write_config(host, WBSD_CONF_SWRST, 0);
1556
1557 /*
1558 * Select SD/MMC function.
1559 */
1560 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001561
Pierre Ossman85bcc132005-05-08 19:35:27 +01001562 /*
1563 * Set up card detection.
1564 */
1565 wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001566
Pierre Ossman85bcc132005-05-08 19:35:27 +01001567 /*
1568 * Configure chip
1569 */
1570 wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8);
1571 wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001572
Pierre Ossman85bcc132005-05-08 19:35:27 +01001573 wbsd_write_config(host, WBSD_CONF_IRQ, host->irq);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001574
Pierre Ossman85bcc132005-05-08 19:35:27 +01001575 if (host->dma >= 0)
1576 wbsd_write_config(host, WBSD_CONF_DRQ, host->dma);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001577
Pierre Ossman85bcc132005-05-08 19:35:27 +01001578 /*
1579 * Enable and power up chip.
1580 */
1581 wbsd_write_config(host, WBSD_CONF_ENABLE, 1);
1582 wbsd_write_config(host, WBSD_CONF_POWER, 0x20);
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001583
1584 wbsd_lock_config(host);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001585}
1586
1587/*
1588 * Check that configured resources are correct.
1589 */
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001590
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001591static int wbsd_chip_validate(struct wbsd_host *host)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001592{
1593 int base, irq, dma;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001594
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001595 wbsd_unlock_config(host);
1596
Pierre Ossman85bcc132005-05-08 19:35:27 +01001597 /*
1598 * Select SD/MMC function.
1599 */
1600 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001601
Pierre Ossman85bcc132005-05-08 19:35:27 +01001602 /*
1603 * Read configuration.
1604 */
1605 base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8;
1606 base |= wbsd_read_config(host, WBSD_CONF_PORT_LO);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001607
Pierre Ossman85bcc132005-05-08 19:35:27 +01001608 irq = wbsd_read_config(host, WBSD_CONF_IRQ);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001609
Pierre Ossman85bcc132005-05-08 19:35:27 +01001610 dma = wbsd_read_config(host, WBSD_CONF_DRQ);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001611
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001612 wbsd_lock_config(host);
1613
Pierre Ossman85bcc132005-05-08 19:35:27 +01001614 /*
1615 * Validate against given configuration.
1616 */
1617 if (base != host->base)
1618 return 0;
1619 if (irq != host->irq)
1620 return 0;
1621 if ((dma != host->dma) && (host->dma != -1))
1622 return 0;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001623
Pierre Ossman85bcc132005-05-08 19:35:27 +01001624 return 1;
1625}
1626
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001627/*
1628 * Powers down the SD function
1629 */
1630
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001631static void wbsd_chip_poweroff(struct wbsd_host *host)
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001632{
1633 wbsd_unlock_config(host);
1634
1635 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1636 wbsd_write_config(host, WBSD_CONF_ENABLE, 0);
1637
1638 wbsd_lock_config(host);
1639}
1640
Pierre Ossman85bcc132005-05-08 19:35:27 +01001641/*****************************************************************************\
1642 * *
1643 * Devices setup and shutdown *
1644 * *
1645\*****************************************************************************/
1646
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001647static int __devinit wbsd_init(struct device *dev, int base, int irq, int dma,
Pierre Ossman85bcc132005-05-08 19:35:27 +01001648 int pnp)
1649{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001650 struct wbsd_host *host = NULL;
1651 struct mmc_host *mmc = NULL;
Pierre Ossman85bcc132005-05-08 19:35:27 +01001652 int ret;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001653
Pierre Ossman85bcc132005-05-08 19:35:27 +01001654 ret = wbsd_alloc_mmc(dev);
1655 if (ret)
1656 return ret;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001657
Pierre Ossman85bcc132005-05-08 19:35:27 +01001658 mmc = dev_get_drvdata(dev);
1659 host = mmc_priv(mmc);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001660
Pierre Ossman85bcc132005-05-08 19:35:27 +01001661 /*
1662 * Scan for hardware.
1663 */
1664 ret = wbsd_scan(host);
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001665 if (ret) {
1666 if (pnp && (ret == -ENODEV)) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001667 printk(KERN_WARNING DRIVER_NAME
1668 ": Unable to confirm device presence. You may "
1669 "experience lock-ups.\n");
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001670 } else {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001671 wbsd_free_mmc(dev);
1672 return ret;
1673 }
1674 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001675
Pierre Ossman85bcc132005-05-08 19:35:27 +01001676 /*
1677 * Request resources.
1678 */
Pierre Ossmandd2c6092006-08-07 01:40:04 +02001679 ret = wbsd_request_resources(host, base, irq, dma);
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001680 if (ret) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001681 wbsd_release_resources(host);
1682 wbsd_free_mmc(dev);
1683 return ret;
1684 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001685
Pierre Ossman85bcc132005-05-08 19:35:27 +01001686 /*
1687 * See if chip needs to be configured.
1688 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001689 if (pnp) {
1690 if ((host->config != 0) && !wbsd_chip_validate(host)) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001691 printk(KERN_WARNING DRIVER_NAME
1692 ": PnP active but chip not configured! "
1693 "You probably have a buggy BIOS. "
1694 "Configuring chip manually.\n");
1695 wbsd_chip_config(host);
1696 }
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001697 } else
Pierre Ossman85bcc132005-05-08 19:35:27 +01001698 wbsd_chip_config(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001699
Pierre Ossman85bcc132005-05-08 19:35:27 +01001700 /*
1701 * Power Management stuff. No idea how this works.
1702 * Not tested.
1703 */
1704#ifdef CONFIG_PM
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001705 if (host->config) {
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001706 wbsd_unlock_config(host);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001707 wbsd_write_config(host, WBSD_CONF_PME, 0xA0);
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001708 wbsd_lock_config(host);
1709 }
Pierre Ossman85bcc132005-05-08 19:35:27 +01001710#endif
1711 /*
1712 * Allow device to initialise itself properly.
1713 */
1714 mdelay(5);
1715
1716 /*
1717 * Reset the chip into a known state.
1718 */
1719 wbsd_init_device(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001720
Pierre Ossman85bcc132005-05-08 19:35:27 +01001721 mmc_add_host(mmc);
1722
Russell Kingd366b642005-08-19 09:40:08 +01001723 printk(KERN_INFO "%s: W83L51xD", mmc_hostname(mmc));
Pierre Ossman85bcc132005-05-08 19:35:27 +01001724 if (host->chip_id != 0)
1725 printk(" id %x", (int)host->chip_id);
1726 printk(" at 0x%x irq %d", (int)host->base, (int)host->irq);
1727 if (host->dma >= 0)
1728 printk(" dma %d", (int)host->dma);
1729 else
1730 printk(" FIFO");
1731 if (pnp)
1732 printk(" PnP");
1733 printk("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734
1735 return 0;
1736}
1737
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001738static void __devexit wbsd_shutdown(struct device *dev, int pnp)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001739{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001740 struct mmc_host *mmc = dev_get_drvdata(dev);
1741 struct wbsd_host *host;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001742
Pierre Ossman85bcc132005-05-08 19:35:27 +01001743 if (!mmc)
1744 return;
1745
1746 host = mmc_priv(mmc);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001747
Pierre Ossman85bcc132005-05-08 19:35:27 +01001748 mmc_remove_host(mmc);
1749
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001750 /*
1751 * Power down the SD/MMC function.
1752 */
Pierre Ossman85bcc132005-05-08 19:35:27 +01001753 if (!pnp)
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001754 wbsd_chip_poweroff(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001755
Pierre Ossman85bcc132005-05-08 19:35:27 +01001756 wbsd_release_resources(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001757
Pierre Ossman85bcc132005-05-08 19:35:27 +01001758 wbsd_free_mmc(dev);
1759}
1760
1761/*
1762 * Non-PnP
1763 */
1764
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001765static int __devinit wbsd_probe(struct platform_device *dev)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001766{
Pierre Ossmandd2c6092006-08-07 01:40:04 +02001767 /* Use the module parameters for resources */
Russell King3ae5eae2005-11-09 22:32:44 +00001768 return wbsd_init(&dev->dev, io, irq, dma, 0);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001769}
1770
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001771static int __devexit wbsd_remove(struct platform_device *dev)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001772{
Russell King3ae5eae2005-11-09 22:32:44 +00001773 wbsd_shutdown(&dev->dev, 0);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001774
1775 return 0;
1776}
1777
1778/*
1779 * PnP
1780 */
1781
1782#ifdef CONFIG_PNP
1783
1784static int __devinit
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001785wbsd_pnp_probe(struct pnp_dev *pnpdev, const struct pnp_device_id *dev_id)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001786{
1787 int io, irq, dma;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001788
Pierre Ossman85bcc132005-05-08 19:35:27 +01001789 /*
1790 * Get resources from PnP layer.
1791 */
1792 io = pnp_port_start(pnpdev, 0);
1793 irq = pnp_irq(pnpdev, 0);
1794 if (pnp_dma_valid(pnpdev, 0))
1795 dma = pnp_dma(pnpdev, 0);
1796 else
1797 dma = -1;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001798
Pierre Ossman85bcc132005-05-08 19:35:27 +01001799 DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001800
Pierre Ossman85bcc132005-05-08 19:35:27 +01001801 return wbsd_init(&pnpdev->dev, io, irq, dma, 1);
1802}
1803
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001804static void __devexit wbsd_pnp_remove(struct pnp_dev *dev)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001805{
1806 wbsd_shutdown(&dev->dev, 1);
1807}
1808
1809#endif /* CONFIG_PNP */
1810
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811/*
1812 * Power management
1813 */
1814
1815#ifdef CONFIG_PM
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001816
Pierre Ossman5e68d952006-01-08 14:21:52 +00001817static int wbsd_suspend(struct wbsd_host *host, pm_message_t state)
1818{
1819 BUG_ON(host == NULL);
1820
1821 return mmc_suspend_host(host->mmc, state);
1822}
1823
1824static int wbsd_resume(struct wbsd_host *host)
1825{
1826 BUG_ON(host == NULL);
1827
1828 wbsd_init_device(host);
1829
1830 return mmc_resume_host(host->mmc);
1831}
1832
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001833static int wbsd_platform_suspend(struct platform_device *dev,
1834 pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835{
Russell King3ae5eae2005-11-09 22:32:44 +00001836 struct mmc_host *mmc = platform_get_drvdata(dev);
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001837 struct wbsd_host *host;
1838 int ret;
1839
Pierre Ossman5e68d952006-01-08 14:21:52 +00001840 if (mmc == NULL)
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001841 return 0;
1842
Pierre Ossman5e68d952006-01-08 14:21:52 +00001843 DBGF("Suspending...\n");
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001844
1845 host = mmc_priv(mmc);
1846
Pierre Ossman5e68d952006-01-08 14:21:52 +00001847 ret = wbsd_suspend(host, state);
1848 if (ret)
1849 return ret;
1850
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001851 wbsd_chip_poweroff(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852
1853 return 0;
1854}
1855
Pierre Ossman5e68d952006-01-08 14:21:52 +00001856static int wbsd_platform_resume(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857{
Russell King3ae5eae2005-11-09 22:32:44 +00001858 struct mmc_host *mmc = platform_get_drvdata(dev);
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001859 struct wbsd_host *host;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860
Pierre Ossman5e68d952006-01-08 14:21:52 +00001861 if (mmc == NULL)
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001862 return 0;
1863
Pierre Ossman5e68d952006-01-08 14:21:52 +00001864 DBGF("Resuming...\n");
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001865
1866 host = mmc_priv(mmc);
1867
1868 wbsd_chip_config(host);
1869
1870 /*
1871 * Allow device to initialise itself properly.
1872 */
1873 mdelay(5);
1874
Pierre Ossman5e68d952006-01-08 14:21:52 +00001875 return wbsd_resume(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876}
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001877
Pierre Ossman5e68d952006-01-08 14:21:52 +00001878#ifdef CONFIG_PNP
1879
1880static int wbsd_pnp_suspend(struct pnp_dev *pnp_dev, pm_message_t state)
1881{
1882 struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev);
1883 struct wbsd_host *host;
1884
1885 if (mmc == NULL)
1886 return 0;
1887
1888 DBGF("Suspending...\n");
1889
1890 host = mmc_priv(mmc);
1891
1892 return wbsd_suspend(host, state);
1893}
1894
1895static int wbsd_pnp_resume(struct pnp_dev *pnp_dev)
1896{
1897 struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev);
1898 struct wbsd_host *host;
1899
1900 if (mmc == NULL)
1901 return 0;
1902
1903 DBGF("Resuming...\n");
1904
1905 host = mmc_priv(mmc);
1906
1907 /*
1908 * See if chip needs to be configured.
1909 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001910 if (host->config != 0) {
1911 if (!wbsd_chip_validate(host)) {
Pierre Ossman5e68d952006-01-08 14:21:52 +00001912 printk(KERN_WARNING DRIVER_NAME
1913 ": PnP active but chip not configured! "
1914 "You probably have a buggy BIOS. "
1915 "Configuring chip manually.\n");
1916 wbsd_chip_config(host);
1917 }
1918 }
1919
1920 /*
1921 * Allow device to initialise itself properly.
1922 */
1923 mdelay(5);
1924
1925 return wbsd_resume(host);
1926}
1927
1928#endif /* CONFIG_PNP */
1929
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001930#else /* CONFIG_PM */
1931
Pierre Ossman5e68d952006-01-08 14:21:52 +00001932#define wbsd_platform_suspend NULL
1933#define wbsd_platform_resume NULL
1934
1935#define wbsd_pnp_suspend NULL
1936#define wbsd_pnp_resume NULL
Pierre Ossman19c1f3c2005-10-28 21:37:29 +01001937
1938#endif /* CONFIG_PM */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939
Pierre Ossman85bcc132005-05-08 19:35:27 +01001940static struct platform_device *wbsd_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941
Russell King3ae5eae2005-11-09 22:32:44 +00001942static struct platform_driver wbsd_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 .probe = wbsd_probe,
Pierre Ossman93968d72005-11-09 23:21:06 +00001944 .remove = __devexit_p(wbsd_remove),
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001945
Pierre Ossman5e68d952006-01-08 14:21:52 +00001946 .suspend = wbsd_platform_suspend,
1947 .resume = wbsd_platform_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00001948 .driver = {
1949 .name = DRIVER_NAME,
Kay Sieversbc65c722008-04-15 14:34:28 -07001950 .owner = THIS_MODULE,
Russell King3ae5eae2005-11-09 22:32:44 +00001951 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952};
1953
Pierre Ossman85bcc132005-05-08 19:35:27 +01001954#ifdef CONFIG_PNP
1955
1956static struct pnp_driver wbsd_pnp_driver = {
1957 .name = DRIVER_NAME,
1958 .id_table = pnp_dev_table,
1959 .probe = wbsd_pnp_probe,
Pierre Ossman93968d72005-11-09 23:21:06 +00001960 .remove = __devexit_p(wbsd_pnp_remove),
Pierre Ossman5e68d952006-01-08 14:21:52 +00001961
1962 .suspend = wbsd_pnp_suspend,
1963 .resume = wbsd_pnp_resume,
Pierre Ossman85bcc132005-05-08 19:35:27 +01001964};
1965
1966#endif /* CONFIG_PNP */
1967
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968/*
1969 * Module loading/unloading
1970 */
1971
1972static int __init wbsd_drv_init(void)
1973{
1974 int result;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001975
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 printk(KERN_INFO DRIVER_NAME
Pierre Ossman1615cc22007-02-09 08:19:07 +01001977 ": Winbond W83L51xD SD/MMC card interface driver\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979
Pierre Ossman85bcc132005-05-08 19:35:27 +01001980#ifdef CONFIG_PNP
1981
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001982 if (!nopnp) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001983 result = pnp_register_driver(&wbsd_pnp_driver);
1984 if (result < 0)
1985 return result;
1986 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001987#endif /* CONFIG_PNP */
1988
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001989 if (nopnp) {
Russell King3ae5eae2005-11-09 22:32:44 +00001990 result = platform_driver_register(&wbsd_driver);
Pierre Ossman85bcc132005-05-08 19:35:27 +01001991 if (result < 0)
1992 return result;
1993
Dmitry Torokhov21500bb2006-01-03 22:57:35 +00001994 wbsd_device = platform_device_alloc(DRIVER_NAME, -1);
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001995 if (!wbsd_device) {
Dmitry Torokhov21500bb2006-01-03 22:57:35 +00001996 platform_driver_unregister(&wbsd_driver);
1997 return -ENOMEM;
1998 }
1999
2000 result = platform_device_add(wbsd_device);
Pierre Ossmancfa7f522006-01-08 18:17:55 +00002001 if (result) {
Dmitry Torokhov21500bb2006-01-03 22:57:35 +00002002 platform_device_put(wbsd_device);
2003 platform_driver_unregister(&wbsd_driver);
2004 return result;
2005 }
Pierre Ossman85bcc132005-05-08 19:35:27 +01002006 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007
2008 return 0;
2009}
2010
2011static void __exit wbsd_drv_exit(void)
2012{
Pierre Ossman85bcc132005-05-08 19:35:27 +01002013#ifdef CONFIG_PNP
2014
2015 if (!nopnp)
2016 pnp_unregister_driver(&wbsd_pnp_driver);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01002017
2018#endif /* CONFIG_PNP */
Pierre Ossman85bcc132005-05-08 19:35:27 +01002019
Pierre Ossmancfa7f522006-01-08 18:17:55 +00002020 if (nopnp) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01002021 platform_device_unregister(wbsd_device);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01002022
Russell King3ae5eae2005-11-09 22:32:44 +00002023 platform_driver_unregister(&wbsd_driver);
Pierre Ossman85bcc132005-05-08 19:35:27 +01002024 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025
2026 DBG("unloaded\n");
2027}
2028
2029module_init(wbsd_drv_init);
2030module_exit(wbsd_drv_exit);
Pierre Ossman85bcc132005-05-08 19:35:27 +01002031#ifdef CONFIG_PNP
2032module_param(nopnp, uint, 0444);
2033#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034module_param(io, uint, 0444);
2035module_param(irq, uint, 0444);
2036module_param(dma, int, 0444);
2037
2038MODULE_LICENSE("GPL");
Pierre Ossmande1d09e2005-11-09 23:21:49 +00002039MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041
Pierre Ossman85bcc132005-05-08 19:35:27 +01002042#ifdef CONFIG_PNP
2043MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)");
2044#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)");
2046MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)");
2047MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)");