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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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39#include <asm/io.h>
40#include <asm/dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42#include "wbsd.h"
43
44#define DRIVER_NAME "wbsd"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#define DBG(x...) \
Russell Kingc6563172006-03-29 09:30:20 +010047 pr_debug(DRIVER_NAME ": " x)
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#define DBGF(f, x...) \
Russell Kingc6563172006-03-29 09:30:20 +010049 pr_debug(DRIVER_NAME " [%s()]: " f, __func__ , ##x)
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Linus Torvalds1da177e2005-04-16 15:20:36 -070051/*
Pierre Ossman85bcc132005-05-08 19:35:27 +010052 * Device resources
53 */
54
55#ifdef CONFIG_PNP
56
57static const struct pnp_device_id pnp_dev_table[] = {
58 { "WEC0517", 0 },
59 { "WEC0518", 0 },
60 { "", 0 },
61};
62
63MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
64
65#endif /* CONFIG_PNP */
66
Adrian Bunk3eee0d02005-07-01 13:07:37 +010067static const int config_ports[] = { 0x2E, 0x4E };
68static const int unlock_codes[] = { 0x83, 0x87 };
69
70static const int valid_ids[] = {
71 0x7112,
Tomas Winkler9eeebd22008-06-30 10:50:23 +030072};
Adrian Bunk3eee0d02005-07-01 13:07:37 +010073
Pierre Ossman85bcc132005-05-08 19:35:27 +010074#ifdef CONFIG_PNP
Tomas Winkler9eeebd22008-06-30 10:50:23 +030075static unsigned int param_nopnp = 0;
Pierre Ossman85bcc132005-05-08 19:35:27 +010076#else
Tomas Winkler9eeebd22008-06-30 10:50:23 +030077static const unsigned int param_nopnp = 1;
Pierre Ossman85bcc132005-05-08 19:35:27 +010078#endif
Tomas Winkler9eeebd22008-06-30 10:50:23 +030079static unsigned int param_io = 0x248;
80static unsigned int param_irq = 6;
81static int param_dma = 2;
Pierre Ossman85bcc132005-05-08 19:35:27 +010082
83/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 * Basic functions
85 */
86
Pierre Ossmancfa7f522006-01-08 18:17:55 +000087static inline void wbsd_unlock_config(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088{
Pierre Ossman85bcc132005-05-08 19:35:27 +010089 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +010090
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 outb(host->unlock_code, host->config);
92 outb(host->unlock_code, host->config);
93}
94
Pierre Ossmancfa7f522006-01-08 18:17:55 +000095static inline void wbsd_lock_config(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
Pierre Ossman85bcc132005-05-08 19:35:27 +010097 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +010098
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 outb(LOCK_CODE, host->config);
100}
101
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000102static inline void wbsd_write_config(struct wbsd_host *host, u8 reg, u8 value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103{
Pierre Ossman85bcc132005-05-08 19:35:27 +0100104 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 outb(reg, host->config);
107 outb(value, host->config + 1);
108}
109
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000110static inline u8 wbsd_read_config(struct wbsd_host *host, u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Pierre Ossman85bcc132005-05-08 19:35:27 +0100112 BUG_ON(host->config == 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 outb(reg, host->config);
115 return inb(host->config + 1);
116}
117
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000118static inline void wbsd_write_index(struct wbsd_host *host, u8 index, u8 value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119{
120 outb(index, host->base + WBSD_IDXR);
121 outb(value, host->base + WBSD_DATAR);
122}
123
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000124static inline u8 wbsd_read_index(struct wbsd_host *host, u8 index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125{
126 outb(index, host->base + WBSD_IDXR);
127 return inb(host->base + WBSD_DATAR);
128}
129
130/*
131 * Common routines
132 */
133
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000134static void wbsd_init_device(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
136 u8 setup, ier;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 /*
139 * Reset chip (SD/MMC part) and fifo.
140 */
141 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
142 setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET;
143 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 /*
Pierre Ossman85bcc132005-05-08 19:35:27 +0100146 * Set DAT3 to input
147 */
148 setup &= ~WBSD_DAT3_H;
149 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
150 host->flags &= ~WBSD_FIGNORE_DETECT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100151
Pierre Ossman85bcc132005-05-08 19:35:27 +0100152 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 * Read back default clock.
154 */
155 host->clk = wbsd_read_index(host, WBSD_IDX_CLK);
156
157 /*
158 * Power down port.
159 */
160 outb(WBSD_POWER_N, host->base + WBSD_CSR);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 /*
163 * Set maximum timeout.
164 */
165 wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 /*
Pierre Ossman85bcc132005-05-08 19:35:27 +0100168 * Test for card presence
169 */
170 if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT)
171 host->flags |= WBSD_FCARD_PRESENT;
172 else
173 host->flags &= ~WBSD_FCARD_PRESENT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100174
Pierre Ossman85bcc132005-05-08 19:35:27 +0100175 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 * Enable interesting interrupts.
177 */
178 ier = 0;
179 ier |= WBSD_EINT_CARD;
180 ier |= WBSD_EINT_FIFO_THRE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 ier |= WBSD_EINT_CRC;
Pierre Ossman5721dbf2007-04-13 23:25:59 +0200182 ier |= WBSD_EINT_TIMEOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 ier |= WBSD_EINT_TC;
184
185 outb(ier, host->base + WBSD_EIR);
186
187 /*
188 * Clear interrupts.
189 */
190 inb(host->base + WBSD_ISR);
191}
192
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000193static void wbsd_reset(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
195 u8 setup;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100196
Girish K Sa3c76eb2011-10-11 11:44:09 +0530197 pr_err("%s: Resetting chip\n", mmc_hostname(host->mmc));
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 /*
200 * Soft reset of chip (SD/MMC part).
201 */
202 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
203 setup |= WBSD_SOFT_RESET;
204 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
205}
206
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000207static void wbsd_request_end(struct wbsd_host *host, struct mmc_request *mrq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
209 unsigned long dmaflags;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100210
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000211 if (host->dma >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 /*
213 * Release ISA DMA controller.
214 */
215 dmaflags = claim_dma_lock();
216 disable_dma(host->dma);
217 clear_dma_ff(host->dma);
218 release_dma_lock(dmaflags);
219
220 /*
221 * Disable DMA on host.
222 */
223 wbsd_write_index(host, WBSD_IDX_DMA, 0);
224 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 host->mrq = NULL;
227
228 /*
229 * MMC layer might call back into the driver so first unlock.
230 */
231 spin_unlock(&host->lock);
232 mmc_request_done(host->mmc, mrq);
233 spin_lock(&host->lock);
234}
235
236/*
237 * Scatter/gather functions
238 */
239
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000240static inline void wbsd_init_sg(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
242 /*
243 * Get info. about SG list from data structure.
244 */
245 host->cur_sg = data->sg;
246 host->num_sg = data->sg_len;
247
248 host->offset = 0;
249 host->remain = host->cur_sg->length;
250}
251
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000252static inline int wbsd_next_sg(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
254 /*
255 * Skip to next SG entry.
256 */
257 host->cur_sg++;
258 host->num_sg--;
259
260 /*
261 * Any entries left?
262 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000263 if (host->num_sg > 0) {
264 host->offset = 0;
265 host->remain = host->cur_sg->length;
266 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 return host->num_sg;
269}
270
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100271static inline char *wbsd_sg_to_buffer(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272{
Jens Axboe45711f12007-10-22 21:19:53 +0200273 return sg_virt(host->cur_sg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274}
275
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000276static inline void wbsd_sg_to_dma(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277{
Alex Dubov14d836e2007-04-13 19:04:38 +0200278 unsigned int len, i;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000279 struct scatterlist *sg;
280 char *dmabuf = host->dma_buffer;
281 char *sgbuf;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 sg = data->sg;
284 len = data->sg_len;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100285
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000286 for (i = 0; i < len; i++) {
Jens Axboe45711f12007-10-22 21:19:53 +0200287 sgbuf = sg_virt(&sg[i]);
Alex Dubov14d836e2007-04-13 19:04:38 +0200288 memcpy(dmabuf, sgbuf, sg[i].length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 dmabuf += sg[i].length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291}
292
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000293static inline void wbsd_dma_to_sg(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294{
Alex Dubov14d836e2007-04-13 19:04:38 +0200295 unsigned int len, i;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000296 struct scatterlist *sg;
297 char *dmabuf = host->dma_buffer;
298 char *sgbuf;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 sg = data->sg;
301 len = data->sg_len;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100302
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000303 for (i = 0; i < len; i++) {
Jens Axboe45711f12007-10-22 21:19:53 +0200304 sgbuf = sg_virt(&sg[i]);
Alex Dubov14d836e2007-04-13 19:04:38 +0200305 memcpy(sgbuf, dmabuf, sg[i].length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 dmabuf += sg[i].length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308}
309
310/*
311 * Command handling
312 */
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100313
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000314static inline void wbsd_get_short_reply(struct wbsd_host *host,
315 struct mmc_command *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316{
317 /*
318 * Correct response type?
319 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000320 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200321 cmd->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 return;
323 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100324
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000325 cmd->resp[0] = wbsd_read_index(host, WBSD_IDX_RESP12) << 24;
326 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP13) << 16;
327 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP14) << 8;
328 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP15) << 0;
329 cmd->resp[1] = wbsd_read_index(host, WBSD_IDX_RESP16) << 24;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330}
331
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000332static inline void wbsd_get_long_reply(struct wbsd_host *host,
333 struct mmc_command *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
335 int i;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100336
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 /*
338 * Correct response type?
339 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000340 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200341 cmd->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 return;
343 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100344
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000345 for (i = 0; i < 4; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 cmd->resp[i] =
347 wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24;
348 cmd->resp[i] |=
349 wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16;
350 cmd->resp[i] |=
351 wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8;
352 cmd->resp[i] |=
353 wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0;
354 }
355}
356
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000357static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{
359 int i;
360 u8 status, isr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 /*
363 * Clear accumulated ISR. The interrupt routine
364 * will fill this one with events that occur during
365 * transfer.
366 */
367 host->isr = 0;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100368
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 /*
370 * Send the command (CRC calculated by host).
371 */
372 outb(cmd->opcode, host->base + WBSD_CMDR);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000373 for (i = 3; i >= 0; i--)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100375
Pierre Ossman17b04292007-07-22 22:18:46 +0200376 cmd->error = 0;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 /*
379 * Wait for the request to complete.
380 */
381 do {
382 status = wbsd_read_index(host, WBSD_IDX_STATUS);
383 } while (status & WBSD_CARDTRAFFIC);
384
385 /*
386 * Do we expect a reply?
387 */
Russell Kinge9225172006-02-02 12:23:12 +0000388 if (cmd->flags & MMC_RSP_PRESENT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 /*
390 * Read back status.
391 */
392 isr = host->isr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 /* Card removed? */
395 if (isr & WBSD_INT_CARD)
Pierre Ossman17b04292007-07-22 22:18:46 +0200396 cmd->error = -ENOMEDIUM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 /* Timeout? */
398 else if (isr & WBSD_INT_TIMEOUT)
Pierre Ossman17b04292007-07-22 22:18:46 +0200399 cmd->error = -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 /* CRC? */
401 else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC))
Pierre Ossman17b04292007-07-22 22:18:46 +0200402 cmd->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 /* All ok */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000404 else {
Russell Kinge9225172006-02-02 12:23:12 +0000405 if (cmd->flags & MMC_RSP_136)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 wbsd_get_long_reply(host, cmd);
Russell Kinge9225172006-02-02 12:23:12 +0000407 else
408 wbsd_get_short_reply(host, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 }
410 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411}
412
413/*
414 * Data functions
415 */
416
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000417static void wbsd_empty_fifo(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000419 struct mmc_data *data = host->mrq->cmd->data;
420 char *buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 int i, fsr, fifo;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100422
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 /*
424 * Handle excessive data.
425 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200426 if (host->num_sg == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100428
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100429 buffer = wbsd_sg_to_buffer(host) + host->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431 /*
432 * Drain the fifo. This has a tendency to loop longer
433 * than the FIFO length (usually one block).
434 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000435 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 /*
437 * The size field in the FSR is broken so we have to
438 * do some guessing.
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100439 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 if (fsr & WBSD_FIFO_FULL)
441 fifo = 16;
442 else if (fsr & WBSD_FIFO_FUTHRE)
443 fifo = 8;
444 else
445 fifo = 1;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100446
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000447 for (i = 0; i < fifo; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 *buffer = inb(host->base + WBSD_DFR);
449 buffer++;
450 host->offset++;
451 host->remain--;
452
453 data->bytes_xfered++;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100454
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 * End of scatter list entry?
457 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000458 if (host->remain == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 /*
460 * Get next entry. Check if last.
461 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200462 if (!wbsd_next_sg(host))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100464
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100465 buffer = wbsd_sg_to_buffer(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 }
467 }
468 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 /*
471 * This is a very dirty hack to solve a
472 * hardware problem. The chip doesn't trigger
473 * FIFO threshold interrupts properly.
474 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200475 if ((data->blocks * data->blksz - data->bytes_xfered) < 16)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 tasklet_schedule(&host->fifo_tasklet);
477}
478
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000479static void wbsd_fill_fifo(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000481 struct mmc_data *data = host->mrq->cmd->data;
482 char *buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 int i, fsr, fifo;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 /*
486 * Check that we aren't being called after the
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300487 * entire buffer has been transferred.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200489 if (host->num_sg == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 return;
491
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100492 buffer = wbsd_sg_to_buffer(host) + host->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
494 /*
495 * Fill the fifo. This has a tendency to loop longer
496 * than the FIFO length (usually one block).
497 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000498 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 /*
500 * The size field in the FSR is broken so we have to
501 * do some guessing.
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100502 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 if (fsr & WBSD_FIFO_EMPTY)
504 fifo = 0;
505 else if (fsr & WBSD_FIFO_EMTHRE)
506 fifo = 8;
507 else
508 fifo = 15;
509
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000510 for (i = 16; i > fifo; i--) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 outb(*buffer, host->base + WBSD_DFR);
512 buffer++;
513 host->offset++;
514 host->remain--;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100515
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 data->bytes_xfered++;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 * End of scatter list entry?
520 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000521 if (host->remain == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 /*
523 * Get next entry. Check if last.
524 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200525 if (!wbsd_next_sg(host))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 return;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100527
Pierre Ossman4a0ddbd2007-01-31 18:20:48 +0100528 buffer = wbsd_sg_to_buffer(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 }
530 }
531 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100532
Pierre Ossman85bcc132005-05-08 19:35:27 +0100533 /*
534 * The controller stops sending interrupts for
535 * 'FIFO empty' under certain conditions. So we
536 * need to be a bit more pro-active.
537 */
538 tasklet_schedule(&host->fifo_tasklet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539}
540
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000541static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542{
543 u16 blksize;
544 u8 setup;
545 unsigned long dmaflags;
Alex Dubov14d836e2007-04-13 19:04:38 +0200546 unsigned int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 /*
549 * Calculate size.
550 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200551 size = data->blocks * data->blksz;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
553 /*
554 * Check timeout values for overflow.
555 * (Yes, some cards cause this value to overflow).
556 */
557 if (data->timeout_ns > 127000000)
558 wbsd_write_index(host, WBSD_IDX_TAAC, 127);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000559 else {
560 wbsd_write_index(host, WBSD_IDX_TAAC,
561 data->timeout_ns / 1000000);
562 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 if (data->timeout_clks > 255)
565 wbsd_write_index(host, WBSD_IDX_NSAC, 255);
566 else
567 wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 /*
570 * Inform the chip of how large blocks will be
571 * sent. It needs this to determine when to
572 * calculate CRC.
573 *
574 * Space for CRC must be included in the size.
Pierre Ossman65ae2112005-09-06 15:18:57 -0700575 * Two bytes are needed for each data line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000577 if (host->bus_width == MMC_BUS_WIDTH_1) {
Pavel Pisa2c171bf2006-05-19 21:48:03 +0100578 blksize = data->blksz + 2;
Pierre Ossman65ae2112005-09-06 15:18:57 -0700579
580 wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0);
581 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000582 } else if (host->bus_width == MMC_BUS_WIDTH_4) {
Pavel Pisa2c171bf2006-05-19 21:48:03 +0100583 blksize = data->blksz + 2 * 4;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100584
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000585 wbsd_write_index(host, WBSD_IDX_PBSMSB,
586 ((blksize >> 4) & 0xF0) | WBSD_DATA_WIDTH);
Pierre Ossman65ae2112005-09-06 15:18:57 -0700587 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000588 } else {
Pierre Ossman17b04292007-07-22 22:18:46 +0200589 data->error = -EINVAL;
Pierre Ossman65ae2112005-09-06 15:18:57 -0700590 return;
591 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
593 /*
594 * Clear the FIFO. This is needed even for DMA
595 * transfers since the chip still uses the FIFO
596 * internally.
597 */
598 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
599 setup |= WBSD_FIFO_RESET;
600 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100601
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 /*
603 * DMA transfer?
604 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000605 if (host->dma >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 /*
607 * The buffer for DMA is only 64 kB.
608 */
Alex Dubov14d836e2007-04-13 19:04:38 +0200609 BUG_ON(size > 0x10000);
610 if (size > 0x10000) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200611 data->error = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 return;
613 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 /*
616 * Transfer data from the SG list to
617 * the DMA buffer.
618 */
619 if (data->flags & MMC_DATA_WRITE)
620 wbsd_sg_to_dma(host, data);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100621
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 /*
623 * Initialise the ISA DMA controller.
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100624 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 dmaflags = claim_dma_lock();
626 disable_dma(host->dma);
627 clear_dma_ff(host->dma);
628 if (data->flags & MMC_DATA_READ)
629 set_dma_mode(host->dma, DMA_MODE_READ & ~0x40);
630 else
631 set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40);
632 set_dma_addr(host->dma, host->dma_addr);
Alex Dubov14d836e2007-04-13 19:04:38 +0200633 set_dma_count(host->dma, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
635 enable_dma(host->dma);
636 release_dma_lock(dmaflags);
637
638 /*
639 * Enable DMA on the host.
640 */
641 wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000642 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 /*
644 * This flag is used to keep printk
645 * output to a minimum.
646 */
647 host->firsterr = 1;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100648
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 /*
650 * Initialise the SG list.
651 */
652 wbsd_init_sg(host, data);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100653
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 /*
655 * Turn off DMA.
656 */
657 wbsd_write_index(host, WBSD_IDX_DMA, 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 /*
660 * Set up FIFO threshold levels (and fill
661 * buffer if doing a write).
662 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000663 if (data->flags & MMC_DATA_READ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 wbsd_write_index(host, WBSD_IDX_FIFOEN,
665 WBSD_FIFOEN_FULL | 8);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000666 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 wbsd_write_index(host, WBSD_IDX_FIFOEN,
668 WBSD_FIFOEN_EMPTY | 8);
669 wbsd_fill_fifo(host);
670 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100671 }
672
Pierre Ossman17b04292007-07-22 22:18:46 +0200673 data->error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674}
675
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000676static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677{
678 unsigned long dmaflags;
679 int count;
680 u8 status;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 WARN_ON(host->mrq == NULL);
683
684 /*
685 * Send a stop command if needed.
686 */
687 if (data->stop)
688 wbsd_send_command(host, data->stop);
689
690 /*
691 * Wait for the controller to leave data
692 * transfer state.
693 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000694 do {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 status = wbsd_read_index(host, WBSD_IDX_STATUS);
696 } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE));
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100697
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 /*
699 * DMA transfer?
700 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000701 if (host->dma >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 /*
703 * Disable DMA on the host.
704 */
705 wbsd_write_index(host, WBSD_IDX_DMA, 0);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 /*
708 * Turn of ISA DMA controller.
709 */
710 dmaflags = claim_dma_lock();
711 disable_dma(host->dma);
712 clear_dma_ff(host->dma);
713 count = get_dma_residue(host->dma);
714 release_dma_lock(dmaflags);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100715
Alex Dubov14d836e2007-04-13 19:04:38 +0200716 data->bytes_xfered = host->mrq->data->blocks *
717 host->mrq->data->blksz - count;
718 data->bytes_xfered -= data->bytes_xfered % data->blksz;
719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 /*
721 * Any leftover data?
722 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000723 if (count) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530724 pr_err("%s: Incomplete DMA transfer. "
Pierre Ossmand1916342005-11-05 10:36:35 +0000725 "%d bytes left.\n",
726 mmc_hostname(host->mmc), count);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100727
Pierre Ossman17b04292007-07-22 22:18:46 +0200728 if (!data->error)
729 data->error = -EIO;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000730 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 /*
732 * Transfer data from DMA buffer to
733 * SG list.
734 */
735 if (data->flags & MMC_DATA_READ)
736 wbsd_dma_to_sg(host, data);
Alex Dubov14d836e2007-04-13 19:04:38 +0200737 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100738
Pierre Ossman17b04292007-07-22 22:18:46 +0200739 if (data->error) {
Alex Dubov14d836e2007-04-13 19:04:38 +0200740 if (data->bytes_xfered)
741 data->bytes_xfered -= data->blksz;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 }
743 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100744
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 wbsd_request_end(host, host->mrq);
746}
747
Pierre Ossman85bcc132005-05-08 19:35:27 +0100748/*****************************************************************************\
749 * *
750 * MMC layer callbacks *
751 * *
752\*****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000754static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000756 struct wbsd_host *host = mmc_priv(mmc);
757 struct mmc_command *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
759 /*
760 * Disable tasklets to avoid a deadlock.
761 */
762 spin_lock_bh(&host->lock);
763
764 BUG_ON(host->mrq != NULL);
765
766 cmd = mrq->cmd;
767
768 host->mrq = mrq;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 /*
Pierre Ossman17b04292007-07-22 22:18:46 +0200771 * Check that there is actually a card in the slot.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000773 if (!(host->flags & WBSD_FCARD_PRESENT)) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200774 cmd->error = -ENOMEDIUM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 goto done;
776 }
777
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000778 if (cmd->data) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 /*
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100780 * The hardware is so delightfully stupid that it has a list
781 * of "data" commands. If a command isn't on this list, it'll
782 * just go back to the idle state and won't send any data
783 * interrupts.
784 */
785 switch (cmd->opcode) {
786 case 11:
787 case 17:
788 case 18:
789 case 20:
790 case 24:
791 case 25:
792 case 26:
793 case 27:
794 case 30:
795 case 42:
796 case 56:
797 break;
798
799 /* ACMDs. We don't keep track of state, so we just treat them
800 * like any other command. */
801 case 51:
802 break;
803
804 default:
805#ifdef CONFIG_MMC_DEBUG
Girish K Sa3c76eb2011-10-11 11:44:09 +0530806 pr_warning("%s: Data command %d is not "
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100807 "supported by this controller.\n",
808 mmc_hostname(host->mmc), cmd->opcode);
809#endif
Pierre Ossman17b04292007-07-22 22:18:46 +0200810 cmd->error = -EINVAL;
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100811
812 goto done;
813 };
Pierre Ossmanb2670b12007-05-01 13:35:19 +0200814 }
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100815
Pierre Ossmanb2670b12007-05-01 13:35:19 +0200816 /*
817 * Does the request include data?
818 */
819 if (cmd->data) {
820 wbsd_prepare_data(host, cmd->data);
821
Pierre Ossman17b04292007-07-22 22:18:46 +0200822 if (cmd->data->error)
Pierre Ossmanb2670b12007-05-01 13:35:19 +0200823 goto done;
824 }
825
826 wbsd_send_command(host, cmd);
827
828 /*
829 * If this is a data transfer the request
830 * will be finished after the data has
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300831 * transferred.
Pierre Ossmanb2670b12007-05-01 13:35:19 +0200832 */
Pierre Ossman17b04292007-07-22 22:18:46 +0200833 if (cmd->data && !cmd->error) {
Pierre Ossman5ba593a2006-11-21 17:45:37 +0100834 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 * Dirty fix for hardware bug.
836 */
837 if (host->dma == -1)
838 tasklet_schedule(&host->fifo_tasklet);
839
840 spin_unlock_bh(&host->lock);
841
842 return;
843 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845done:
846 wbsd_request_end(host, mrq);
847
848 spin_unlock_bh(&host->lock);
849}
850
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000851static void wbsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000853 struct wbsd_host *host = mmc_priv(mmc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 u8 clk, setup, pwr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100855
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 spin_lock_bh(&host->lock);
857
858 /*
859 * Reset the chip on each power off.
860 * Should clear out any weird states.
861 */
862 if (ios->power_mode == MMC_POWER_OFF)
863 wbsd_init_device(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 if (ios->clock >= 24000000)
866 clk = WBSD_CLK_24M;
867 else if (ios->clock >= 16000000)
868 clk = WBSD_CLK_16M;
869 else if (ios->clock >= 12000000)
870 clk = WBSD_CLK_12M;
871 else
872 clk = WBSD_CLK_375K;
873
874 /*
875 * Only write to the clock register when
876 * there is an actual change.
877 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000878 if (clk != host->clk) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 wbsd_write_index(host, WBSD_IDX_CLK, clk);
880 host->clk = clk;
881 }
882
Pierre Ossman85bcc132005-05-08 19:35:27 +0100883 /*
884 * Power up card.
885 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000886 if (ios->power_mode != MMC_POWER_OFF) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 pwr = inb(host->base + WBSD_CSR);
888 pwr &= ~WBSD_POWER_N;
889 outb(pwr, host->base + WBSD_CSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 }
891
Pierre Ossman85bcc132005-05-08 19:35:27 +0100892 /*
893 * MMC cards need to have pin 1 high during init.
Pierre Ossman85bcc132005-05-08 19:35:27 +0100894 * It wreaks havoc with the card detection though so
Pierre Ossman1656fa52005-09-03 16:45:49 +0100895 * that needs to be disabled.
Pierre Ossman85bcc132005-05-08 19:35:27 +0100896 */
897 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000898 if (ios->chip_select == MMC_CS_HIGH) {
Pierre Ossman65ae2112005-09-06 15:18:57 -0700899 BUG_ON(ios->bus_width != MMC_BUS_WIDTH_1);
Pierre Ossman85bcc132005-05-08 19:35:27 +0100900 setup |= WBSD_DAT3_H;
901 host->flags |= WBSD_FIGNORE_DETECT;
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000902 } else {
903 if (setup & WBSD_DAT3_H) {
Pierre Ossman19c1f3c2005-10-28 21:37:29 +0100904 setup &= ~WBSD_DAT3_H;
Pierre Ossman1656fa52005-09-03 16:45:49 +0100905
Pierre Ossman19c1f3c2005-10-28 21:37:29 +0100906 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300907 * We cannot resume card detection immediately
Pierre Ossman19c1f3c2005-10-28 21:37:29 +0100908 * because of capacitance and delays in the chip.
909 */
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000910 mod_timer(&host->ignore_timer, jiffies + HZ / 100);
Pierre Ossman19c1f3c2005-10-28 21:37:29 +0100911 }
Pierre Ossman85bcc132005-05-08 19:35:27 +0100912 }
913 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +0100914
Pierre Ossman65ae2112005-09-06 15:18:57 -0700915 /*
916 * Store bus width for later. Will be used when
917 * setting up the data transfer.
918 */
919 host->bus_width = ios->bus_width;
920
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 spin_unlock_bh(&host->lock);
922}
923
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000924static int wbsd_get_ro(struct mmc_host *mmc)
Pierre Ossman65ae2112005-09-06 15:18:57 -0700925{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000926 struct wbsd_host *host = mmc_priv(mmc);
Pierre Ossman65ae2112005-09-06 15:18:57 -0700927 u8 csr;
928
929 spin_lock_bh(&host->lock);
930
931 csr = inb(host->base + WBSD_CSR);
932 csr |= WBSD_MSLED;
933 outb(csr, host->base + WBSD_CSR);
934
935 mdelay(1);
936
937 csr = inb(host->base + WBSD_CSR);
938 csr &= ~WBSD_MSLED;
939 outb(csr, host->base + WBSD_CSR);
940
941 spin_unlock_bh(&host->lock);
942
Anton Vorontsov08f80bb2008-06-17 18:17:39 +0400943 return !!(csr & WBSD_WRPT);
Pierre Ossman65ae2112005-09-06 15:18:57 -0700944}
945
David Brownellab7aefd2006-11-12 17:55:30 -0800946static const struct mmc_host_ops wbsd_ops = {
Pierre Ossman85bcc132005-05-08 19:35:27 +0100947 .request = wbsd_request,
948 .set_ios = wbsd_set_ios,
Pierre Ossman65ae2112005-09-06 15:18:57 -0700949 .get_ro = wbsd_get_ro,
Pierre Ossman85bcc132005-05-08 19:35:27 +0100950};
951
952/*****************************************************************************\
953 * *
954 * Interrupt handling *
955 * *
956\*****************************************************************************/
957
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958/*
Pierre Ossman1656fa52005-09-03 16:45:49 +0100959 * Helper function to reset detection ignore
960 */
961
962static void wbsd_reset_ignore(unsigned long data)
963{
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000964 struct wbsd_host *host = (struct wbsd_host *)data;
Pierre Ossman1656fa52005-09-03 16:45:49 +0100965
966 BUG_ON(host == NULL);
967
968 DBG("Resetting card detection ignore\n");
969
970 spin_lock_bh(&host->lock);
971
972 host->flags &= ~WBSD_FIGNORE_DETECT;
973
974 /*
975 * Card status might have changed during the
976 * blackout.
977 */
978 tasklet_schedule(&host->card_tasklet);
979
980 spin_unlock_bh(&host->lock);
981}
982
983/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 * Tasklets
985 */
986
Pierre Ossmancfa7f522006-01-08 18:17:55 +0000987static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988{
989 WARN_ON(!host->mrq);
990 if (!host->mrq)
991 return NULL;
992
993 WARN_ON(!host->mrq->cmd);
994 if (!host->mrq->cmd)
995 return NULL;
996
997 WARN_ON(!host->mrq->cmd->data);
998 if (!host->mrq->cmd->data)
999 return NULL;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001000
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 return host->mrq->cmd->data;
1002}
1003
1004static void wbsd_tasklet_card(unsigned long param)
1005{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001006 struct wbsd_host *host = (struct wbsd_host *)param;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 u8 csr;
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001008 int delay = -1;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001009
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001011
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001012 if (host->flags & WBSD_FIGNORE_DETECT) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001013 spin_unlock(&host->lock);
1014 return;
1015 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001016
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 csr = inb(host->base + WBSD_CSR);
1018 WARN_ON(csr == 0xff);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001019
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001020 if (csr & WBSD_CARDPRESENT) {
1021 if (!(host->flags & WBSD_FCARD_PRESENT)) {
Pierre Ossman85bcc132005-05-08 19:35:27 +01001022 DBG("Card inserted\n");
1023 host->flags |= WBSD_FCARD_PRESENT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001024
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001025 delay = 500;
Pierre Ossman85bcc132005-05-08 19:35:27 +01001026 }
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001027 } else if (host->flags & WBSD_FCARD_PRESENT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 DBG("Card removed\n");
Pierre Ossman85bcc132005-05-08 19:35:27 +01001029 host->flags &= ~WBSD_FCARD_PRESENT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001030
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001031 if (host->mrq) {
Girish K Sa3c76eb2011-10-11 11:44:09 +05301032 pr_err("%s: Card removed during transfer!\n",
Pierre Ossmand1916342005-11-05 10:36:35 +00001033 mmc_hostname(host->mmc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 wbsd_reset(host);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001035
Pierre Ossman17b04292007-07-22 22:18:46 +02001036 host->mrq->cmd->error = -ENOMEDIUM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 tasklet_schedule(&host->finish_tasklet);
1038 }
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001039
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001040 delay = 0;
Pierre Ossman6e6293d2005-07-01 12:13:55 +01001041 }
Pierre Ossman210ce2a2005-09-12 20:36:19 +01001042
1043 /*
1044 * Unlock first since we might get a call back.
1045 */
1046
1047 spin_unlock(&host->lock);
1048
1049 if (delay != -1)
1050 mmc_detect_change(host->mmc, msecs_to_jiffies(delay));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051}
1052
1053static void wbsd_tasklet_fifo(unsigned long param)
1054{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001055 struct wbsd_host *host = (struct wbsd_host *)param;
1056 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001057
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001059
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 if (!host->mrq)
1061 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001062
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 data = wbsd_get_data(host);
1064 if (!data)
1065 goto end;
1066
1067 if (data->flags & MMC_DATA_WRITE)
1068 wbsd_fill_fifo(host);
1069 else
1070 wbsd_empty_fifo(host);
1071
1072 /*
1073 * Done?
1074 */
Alex Dubov14d836e2007-04-13 19:04:38 +02001075 if (host->num_sg == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 wbsd_write_index(host, WBSD_IDX_FIFOEN, 0);
1077 tasklet_schedule(&host->finish_tasklet);
1078 }
1079
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001080end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 spin_unlock(&host->lock);
1082}
1083
1084static void wbsd_tasklet_crc(unsigned long param)
1085{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001086 struct wbsd_host *host = (struct wbsd_host *)param;
1087 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001088
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001090
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 if (!host->mrq)
1092 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 data = wbsd_get_data(host);
1095 if (!data)
1096 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001097
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 DBGF("CRC error\n");
1099
Pierre Ossman17b04292007-07-22 22:18:46 +02001100 data->error = -EILSEQ;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001101
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 tasklet_schedule(&host->finish_tasklet);
1103
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001104end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 spin_unlock(&host->lock);
1106}
1107
1108static void wbsd_tasklet_timeout(unsigned long param)
1109{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001110 struct wbsd_host *host = (struct wbsd_host *)param;
1111 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001114
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 if (!host->mrq)
1116 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001117
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 data = wbsd_get_data(host);
1119 if (!data)
1120 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001121
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 DBGF("Timeout\n");
1123
Pierre Ossman17b04292007-07-22 22:18:46 +02001124 data->error = -ETIMEDOUT;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001125
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 tasklet_schedule(&host->finish_tasklet);
1127
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001128end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 spin_unlock(&host->lock);
1130}
1131
1132static void wbsd_tasklet_finish(unsigned long param)
1133{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001134 struct wbsd_host *host = (struct wbsd_host *)param;
1135 struct mmc_data *data;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001136
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 spin_lock(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001138
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 WARN_ON(!host->mrq);
1140 if (!host->mrq)
1141 goto end;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001142
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 data = wbsd_get_data(host);
1144 if (!data)
1145 goto end;
1146
1147 wbsd_finish_data(host, data);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001148
1149end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 spin_unlock(&host->lock);
1151}
1152
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153/*
1154 * Interrupt handling
1155 */
1156
David Howells7d12e782006-10-05 14:55:46 +01001157static irqreturn_t wbsd_irq(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001159 struct wbsd_host *host = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 int isr;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001161
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 isr = inb(host->base + WBSD_ISR);
1163
1164 /*
1165 * Was it actually our hardware that caused the interrupt?
1166 */
1167 if (isr == 0xff || isr == 0x00)
1168 return IRQ_NONE;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001169
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 host->isr |= isr;
1171
1172 /*
1173 * Schedule tasklets as needed.
1174 */
1175 if (isr & WBSD_INT_CARD)
1176 tasklet_schedule(&host->card_tasklet);
1177 if (isr & WBSD_INT_FIFO_THRE)
1178 tasklet_schedule(&host->fifo_tasklet);
1179 if (isr & WBSD_INT_CRC)
1180 tasklet_hi_schedule(&host->crc_tasklet);
1181 if (isr & WBSD_INT_TIMEOUT)
1182 tasklet_hi_schedule(&host->timeout_tasklet);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 if (isr & WBSD_INT_TC)
1184 tasklet_schedule(&host->finish_tasklet);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001185
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 return IRQ_HANDLED;
1187}
1188
Pierre Ossman85bcc132005-05-08 19:35:27 +01001189/*****************************************************************************\
1190 * *
1191 * Device initialisation and shutdown *
1192 * *
1193\*****************************************************************************/
1194
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195/*
Pierre Ossman85bcc132005-05-08 19:35:27 +01001196 * Allocate/free MMC structure.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 */
1198
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001199static int wbsd_alloc_mmc(struct device *dev)
Pierre Ossman85bcc132005-05-08 19:35:27 +01001200{
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001201 struct mmc_host *mmc;
1202 struct wbsd_host *host;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001203
Pierre Ossman85bcc132005-05-08 19:35:27 +01001204 /*
1205 * Allocate MMC structure.
1206 */
1207 mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev);
1208 if (!mmc)
1209 return -ENOMEM;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001210
Pierre Ossman85bcc132005-05-08 19:35:27 +01001211 host = mmc_priv(mmc);
1212 host->mmc = mmc;
1213
1214 host->dma = -1;
1215
1216 /*
1217 * Set host parameters.
1218 */
1219 mmc->ops = &wbsd_ops;
1220 mmc->f_min = 375000;
1221 mmc->f_max = 24000000;
Pierre Ossmancfa7f522006-01-08 18:17:55 +00001222 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
Pierre Ossman23af6032008-07-06 01:10:27 +02001223 mmc->caps = MMC_CAP_4_BIT_DATA;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001224
Pierre Ossman85bcc132005-05-08 19:35:27 +01001225 spin_lock_init(&host->lock);
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001226
Pierre Ossman85bcc132005-05-08 19:35:27 +01001227 /*
Pierre Ossman1656fa52005-09-03 16:45:49 +01001228 * Set up timers
Pierre Ossman6e6293d2005-07-01 12:13:55 +01001229 */
Pierre Ossman1656fa52005-09-03 16:45:49 +01001230 init_timer(&host->ignore_timer);
1231 host->ignore_timer.data = (unsigned long)host;
1232 host->ignore_timer.function = wbsd_reset_ignore;
Pierre Ossmanfecf92b2005-09-12 12:09:25 +01001233
Pierre Ossman6e6293d2005-07-01 12:13:55 +01001234 /*
Pierre Ossman85bcc132005-05-08 19:35:27 +01001235 * Maximum number of segments. Worst case is one sector per segment
1236 * so this will be 64kB/512.
1237 */
Martin K. Petersena36274e2010-09-10 01:33:59 -04001238 mmc->max_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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001291static int 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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001347static int 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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001377static void 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 Ossman97067d52008-07-06 00:51:07 +02001423 host->dma_addr = 0;
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:
Girish K Sa3c76eb2011-10-11 11:44:09 +05301432 pr_warning(DRIVER_NAME ": Unable to allocate DMA %d. "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 "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;
Pierre Ossman97067d52008-07-06 00:51:07 +02001448 host->dma_addr = 0;
Pierre Ossman85bcc132005-05-08 19:35:27 +01001449}
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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001455static int 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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001505static int 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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001647static int 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)) {
Girish K Sa3c76eb2011-10-11 11:44:09 +05301667 pr_warning(DRIVER_NAME
Pierre Ossman85bcc132005-05-08 19:35:27 +01001668 ": 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)) {
Girish K Sa3c76eb2011-10-11 11:44:09 +05301691 pr_warning(DRIVER_NAME
Pierre Ossman85bcc132005-05-08 19:35:27 +01001692 ": 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
Girish K Sa3c76eb2011-10-11 11:44:09 +05301723 pr_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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001765static int 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 */
Tomas Winkler9eeebd22008-06-30 10:50:23 +03001768 return wbsd_init(&dev->dev, param_io, param_irq, param_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
Bill Pembertonc3be1ef2012-11-19 13:23:06 -05001784static int
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
Matt Fleming1a13f8f2010-05-26 14:42:08 -07001821 return mmc_suspend_host(host->mmc);
Pierre Ossman5e68d952006-01-08 14:21:52 +00001822}
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)) {
Girish K Sa3c76eb2011-10-11 11:44:09 +05301912 pr_warning(DRIVER_NAME
Pierre Ossman5e68d952006-01-08 14:21:52 +00001913 ": 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,
Bill Pemberton0433c142012-11-19 13:20:26 -05001944 .remove = 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,
Bill Pemberton0433c142012-11-19 13:20:26 -05001960 .remove = 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
Girish K Sa3c76eb2011-10-11 11:44:09 +05301976 pr_info(DRIVER_NAME
Pierre Ossman1615cc22007-02-09 08:19:07 +01001977 ": Winbond W83L51xD SD/MMC card interface driver\n");
Girish K Sa3c76eb2011-10-11 11:44:09 +05301978 pr_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
Tomas Winkler9eeebd22008-06-30 10:50:23 +03001982 if (!param_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
Tomas Winkler9eeebd22008-06-30 10:50:23 +03001989 if (param_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
Tomas Winkler9eeebd22008-06-30 10:50:23 +03002015 if (!param_nopnp)
Pierre Ossman85bcc132005-05-08 19:35:27 +01002016 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
Tomas Winkler9eeebd22008-06-30 10:50:23 +03002020 if (param_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
Tomas Winkler9eeebd22008-06-30 10:50:23 +03002032module_param_named(nopnp, param_nopnp, uint, 0444);
Pierre Ossman85bcc132005-05-08 19:35:27 +01002033#endif
Tomas Winkler9eeebd22008-06-30 10:50:23 +03002034module_param_named(io, param_io, uint, 0444);
2035module_param_named(irq, param_irq, uint, 0444);
2036module_param_named(dma, param_dma, int, 0444);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037
2038MODULE_LICENSE("GPL");
Pierre Ossman32710e82009-04-08 20:14:54 +02002039MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
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)");