blob: 5b665551a6f3a6b47add5a939ab1c93959038222 [file] [log] [blame]
Shawn Guoe4243f12011-02-21 18:35:28 +08001/*
2 * Portions copyright (C) 2003 Russell King, PXA MMCI Driver
3 * Portions copyright (C) 2004-2005 Pierre Ossman, W83L51xD SD/MMC driver
4 *
5 * Copyright 2008 Embedded Alley Solutions, Inc.
6 * Copyright 2009-2011 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 */
22
23#include <linux/kernel.h>
24#include <linux/init.h>
25#include <linux/ioport.h>
Shawn Guo6de4d812012-05-06 13:30:44 +080026#include <linux/of.h>
27#include <linux/of_device.h>
28#include <linux/of_gpio.h>
Shawn Guoe4243f12011-02-21 18:35:28 +080029#include <linux/platform_device.h>
30#include <linux/delay.h>
31#include <linux/interrupt.h>
32#include <linux/dma-mapping.h>
33#include <linux/dmaengine.h>
34#include <linux/highmem.h>
35#include <linux/clk.h>
36#include <linux/err.h>
37#include <linux/completion.h>
38#include <linux/mmc/host.h>
39#include <linux/mmc/mmc.h>
40#include <linux/mmc/sdio.h>
41#include <linux/gpio.h>
42#include <linux/regulator/consumer.h>
Paul Gortmaker88b47672011-07-03 15:15:51 -040043#include <linux/module.h>
Shawn Guo9c92cf22012-05-06 22:56:16 +080044#include <linux/pinctrl/consumer.h>
Shawn Guo70e60202012-05-05 19:40:09 +080045#include <linux/stmp_device.h>
Marek Vasut8be3d3b2012-08-03 17:26:06 +020046#include <linux/spi/mxs-spi.h>
Shawn Guoe4243f12011-02-21 18:35:28 +080047
48#define DRIVER_NAME "mxs-mmc"
49
Shawn Guoe4243f12011-02-21 18:35:28 +080050#define MXS_MMC_IRQ_BITS (BM_SSP_CTRL1_SDIO_IRQ | \
51 BM_SSP_CTRL1_RESP_ERR_IRQ | \
52 BM_SSP_CTRL1_RESP_TIMEOUT_IRQ | \
53 BM_SSP_CTRL1_DATA_TIMEOUT_IRQ | \
54 BM_SSP_CTRL1_DATA_CRC_IRQ | \
55 BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ | \
56 BM_SSP_CTRL1_RECV_TIMEOUT_IRQ | \
57 BM_SSP_CTRL1_FIFO_OVERRUN_IRQ)
58
Marek Vasut8be3d3b2012-08-03 17:26:06 +020059/* card detect polling timeout */
60#define MXS_MMC_DETECT_TIMEOUT (HZ/2)
Shawn Guoef9b4d32012-05-05 20:24:01 +080061
Shawn Guoe4243f12011-02-21 18:35:28 +080062struct mxs_mmc_host {
Marek Vasut829c1bf2012-08-03 17:26:09 +020063 struct mxs_ssp ssp;
64
Shawn Guoe4243f12011-02-21 18:35:28 +080065 struct mmc_host *mmc;
66 struct mmc_request *mrq;
67 struct mmc_command *cmd;
68 struct mmc_data *data;
69
Shawn Guoe4243f12011-02-21 18:35:28 +080070 unsigned char bus_width;
71 spinlock_t lock;
72 int sdio_irq_en;
Shawn Guo31b0ff52012-05-06 13:33:40 +080073 int wp_gpio;
Marek Vasutb6e76f12012-07-19 11:11:39 -040074 bool wp_inverted;
Shawn Guoe4243f12011-02-21 18:35:28 +080075};
76
77static int mxs_mmc_get_ro(struct mmc_host *mmc)
78{
79 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasutb6e76f12012-07-19 11:11:39 -040080 int ret;
Shawn Guoe4243f12011-02-21 18:35:28 +080081
Shawn Guo31b0ff52012-05-06 13:33:40 +080082 if (!gpio_is_valid(host->wp_gpio))
Shawn Guoe4243f12011-02-21 18:35:28 +080083 return -EINVAL;
84
Marek Vasutb6e76f12012-07-19 11:11:39 -040085 ret = gpio_get_value(host->wp_gpio);
86
87 if (host->wp_inverted)
88 ret = !ret;
89
90 return ret;
Shawn Guoe4243f12011-02-21 18:35:28 +080091}
92
93static int mxs_mmc_get_cd(struct mmc_host *mmc)
94{
95 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +020096 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +080097
Marek Vasut829c1bf2012-08-03 17:26:09 +020098 return !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
Shawn Guoe4243f12011-02-21 18:35:28 +080099 BM_SSP_STATUS_CARD_DETECT);
100}
101
102static void mxs_mmc_reset(struct mxs_mmc_host *host)
103{
Marek Vasut829c1bf2012-08-03 17:26:09 +0200104 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800105 u32 ctrl0, ctrl1;
106
Marek Vasut829c1bf2012-08-03 17:26:09 +0200107 stmp_reset_block(ssp->base);
Shawn Guoe4243f12011-02-21 18:35:28 +0800108
109 ctrl0 = BM_SSP_CTRL0_IGNORE_CRC;
110 ctrl1 = BF_SSP(0x3, CTRL1_SSP_MODE) |
111 BF_SSP(0x7, CTRL1_WORD_LENGTH) |
112 BM_SSP_CTRL1_DMA_ENABLE |
113 BM_SSP_CTRL1_POLARITY |
114 BM_SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
115 BM_SSP_CTRL1_DATA_CRC_IRQ_EN |
116 BM_SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
117 BM_SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
118 BM_SSP_CTRL1_RESP_ERR_IRQ_EN;
119
120 writel(BF_SSP(0xffff, TIMING_TIMEOUT) |
121 BF_SSP(2, TIMING_CLOCK_DIVIDE) |
122 BF_SSP(0, TIMING_CLOCK_RATE),
Marek Vasut829c1bf2012-08-03 17:26:09 +0200123 ssp->base + HW_SSP_TIMING(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800124
125 if (host->sdio_irq_en) {
126 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
127 ctrl1 |= BM_SSP_CTRL1_SDIO_IRQ_EN;
128 }
129
Marek Vasut829c1bf2012-08-03 17:26:09 +0200130 writel(ctrl0, ssp->base + HW_SSP_CTRL0);
131 writel(ctrl1, ssp->base + HW_SSP_CTRL1(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800132}
133
134static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
135 struct mmc_command *cmd);
136
137static void mxs_mmc_request_done(struct mxs_mmc_host *host)
138{
139 struct mmc_command *cmd = host->cmd;
140 struct mmc_data *data = host->data;
141 struct mmc_request *mrq = host->mrq;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200142 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800143
144 if (mmc_resp_type(cmd) & MMC_RSP_PRESENT) {
145 if (mmc_resp_type(cmd) & MMC_RSP_136) {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200146 cmd->resp[3] = readl(ssp->base + HW_SSP_SDRESP0(ssp));
147 cmd->resp[2] = readl(ssp->base + HW_SSP_SDRESP1(ssp));
148 cmd->resp[1] = readl(ssp->base + HW_SSP_SDRESP2(ssp));
149 cmd->resp[0] = readl(ssp->base + HW_SSP_SDRESP3(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800150 } else {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200151 cmd->resp[0] = readl(ssp->base + HW_SSP_SDRESP0(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800152 }
153 }
154
155 if (data) {
156 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
Marek Vasut65defb92012-08-03 17:26:12 +0200157 data->sg_len, ssp->dma_dir);
Shawn Guoe4243f12011-02-21 18:35:28 +0800158 /*
159 * If there was an error on any block, we mark all
160 * data blocks as being in error.
161 */
162 if (!data->error)
163 data->bytes_xfered = data->blocks * data->blksz;
164 else
165 data->bytes_xfered = 0;
166
167 host->data = NULL;
168 if (mrq->stop) {
169 mxs_mmc_start_cmd(host, mrq->stop);
170 return;
171 }
172 }
173
174 host->mrq = NULL;
175 mmc_request_done(host->mmc, mrq);
176}
177
178static void mxs_mmc_dma_irq_callback(void *param)
179{
180 struct mxs_mmc_host *host = param;
181
182 mxs_mmc_request_done(host);
183}
184
185static irqreturn_t mxs_mmc_irq_handler(int irq, void *dev_id)
186{
187 struct mxs_mmc_host *host = dev_id;
188 struct mmc_command *cmd = host->cmd;
189 struct mmc_data *data = host->data;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200190 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800191 u32 stat;
192
193 spin_lock(&host->lock);
194
Marek Vasut829c1bf2012-08-03 17:26:09 +0200195 stat = readl(ssp->base + HW_SSP_CTRL1(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800196 writel(stat & MXS_MMC_IRQ_BITS,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200197 ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_CLR);
Shawn Guoe4243f12011-02-21 18:35:28 +0800198
Lauri Hintsala1af36b22012-07-17 17:16:09 +0300199 spin_unlock(&host->lock);
200
Shawn Guoe4243f12011-02-21 18:35:28 +0800201 if ((stat & BM_SSP_CTRL1_SDIO_IRQ) && (stat & BM_SSP_CTRL1_SDIO_IRQ_EN))
202 mmc_signal_sdio_irq(host->mmc);
203
Shawn Guoe4243f12011-02-21 18:35:28 +0800204 if (stat & BM_SSP_CTRL1_RESP_TIMEOUT_IRQ)
205 cmd->error = -ETIMEDOUT;
206 else if (stat & BM_SSP_CTRL1_RESP_ERR_IRQ)
207 cmd->error = -EIO;
208
209 if (data) {
210 if (stat & (BM_SSP_CTRL1_DATA_TIMEOUT_IRQ |
211 BM_SSP_CTRL1_RECV_TIMEOUT_IRQ))
212 data->error = -ETIMEDOUT;
213 else if (stat & BM_SSP_CTRL1_DATA_CRC_IRQ)
214 data->error = -EILSEQ;
215 else if (stat & (BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ |
216 BM_SSP_CTRL1_FIFO_OVERRUN_IRQ))
217 data->error = -EIO;
218 }
219
220 return IRQ_HANDLED;
221}
222
223static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
Huang Shijie921de862012-02-16 14:17:33 +0800224 struct mxs_mmc_host *host, unsigned long flags)
Shawn Guoe4243f12011-02-21 18:35:28 +0800225{
Marek Vasut65defb92012-08-03 17:26:12 +0200226 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800227 struct dma_async_tx_descriptor *desc;
228 struct mmc_data *data = host->data;
229 struct scatterlist * sgl;
230 unsigned int sg_len;
231
232 if (data) {
233 /* data */
234 dma_map_sg(mmc_dev(host->mmc), data->sg,
Marek Vasut65defb92012-08-03 17:26:12 +0200235 data->sg_len, ssp->dma_dir);
Shawn Guoe4243f12011-02-21 18:35:28 +0800236 sgl = data->sg;
237 sg_len = data->sg_len;
238 } else {
239 /* pio */
Marek Vasut65defb92012-08-03 17:26:12 +0200240 sgl = (struct scatterlist *) ssp->ssp_pio_words;
Shawn Guoe4243f12011-02-21 18:35:28 +0800241 sg_len = SSP_PIO_NUM;
242 }
243
Marek Vasut65defb92012-08-03 17:26:12 +0200244 desc = dmaengine_prep_slave_sg(ssp->dmach,
245 sgl, sg_len, ssp->slave_dirn, flags);
Shawn Guoe4243f12011-02-21 18:35:28 +0800246 if (desc) {
247 desc->callback = mxs_mmc_dma_irq_callback;
248 desc->callback_param = host;
249 } else {
250 if (data)
251 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
Marek Vasut65defb92012-08-03 17:26:12 +0200252 data->sg_len, ssp->dma_dir);
Shawn Guoe4243f12011-02-21 18:35:28 +0800253 }
254
255 return desc;
256}
257
258static void mxs_mmc_bc(struct mxs_mmc_host *host)
259{
Marek Vasut65defb92012-08-03 17:26:12 +0200260 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800261 struct mmc_command *cmd = host->cmd;
262 struct dma_async_tx_descriptor *desc;
263 u32 ctrl0, cmd0, cmd1;
264
265 ctrl0 = BM_SSP_CTRL0_ENABLE | BM_SSP_CTRL0_IGNORE_CRC;
266 cmd0 = BF_SSP(cmd->opcode, CMD0_CMD) | BM_SSP_CMD0_APPEND_8CYC;
267 cmd1 = cmd->arg;
268
269 if (host->sdio_irq_en) {
270 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
271 cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
272 }
273
Marek Vasut65defb92012-08-03 17:26:12 +0200274 ssp->ssp_pio_words[0] = ctrl0;
275 ssp->ssp_pio_words[1] = cmd0;
276 ssp->ssp_pio_words[2] = cmd1;
277 ssp->dma_dir = DMA_NONE;
278 ssp->slave_dirn = DMA_TRANS_NONE;
Huang Shijie921de862012-02-16 14:17:33 +0800279 desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK);
Shawn Guoe4243f12011-02-21 18:35:28 +0800280 if (!desc)
281 goto out;
282
283 dmaengine_submit(desc);
Marek Vasut65defb92012-08-03 17:26:12 +0200284 dma_async_issue_pending(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800285 return;
286
287out:
288 dev_warn(mmc_dev(host->mmc),
289 "%s: failed to prep dma\n", __func__);
290}
291
292static void mxs_mmc_ac(struct mxs_mmc_host *host)
293{
Marek Vasut65defb92012-08-03 17:26:12 +0200294 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800295 struct mmc_command *cmd = host->cmd;
296 struct dma_async_tx_descriptor *desc;
297 u32 ignore_crc, get_resp, long_resp;
298 u32 ctrl0, cmd0, cmd1;
299
300 ignore_crc = (mmc_resp_type(cmd) & MMC_RSP_CRC) ?
301 0 : BM_SSP_CTRL0_IGNORE_CRC;
302 get_resp = (mmc_resp_type(cmd) & MMC_RSP_PRESENT) ?
303 BM_SSP_CTRL0_GET_RESP : 0;
304 long_resp = (mmc_resp_type(cmd) & MMC_RSP_136) ?
305 BM_SSP_CTRL0_LONG_RESP : 0;
306
307 ctrl0 = BM_SSP_CTRL0_ENABLE | ignore_crc | get_resp | long_resp;
308 cmd0 = BF_SSP(cmd->opcode, CMD0_CMD);
309 cmd1 = cmd->arg;
310
311 if (host->sdio_irq_en) {
312 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
313 cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
314 }
315
Marek Vasut65defb92012-08-03 17:26:12 +0200316 ssp->ssp_pio_words[0] = ctrl0;
317 ssp->ssp_pio_words[1] = cmd0;
318 ssp->ssp_pio_words[2] = cmd1;
319 ssp->dma_dir = DMA_NONE;
320 ssp->slave_dirn = DMA_TRANS_NONE;
Huang Shijie921de862012-02-16 14:17:33 +0800321 desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK);
Shawn Guoe4243f12011-02-21 18:35:28 +0800322 if (!desc)
323 goto out;
324
325 dmaengine_submit(desc);
Marek Vasut65defb92012-08-03 17:26:12 +0200326 dma_async_issue_pending(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800327 return;
328
329out:
330 dev_warn(mmc_dev(host->mmc),
331 "%s: failed to prep dma\n", __func__);
332}
333
334static unsigned short mxs_ns_to_ssp_ticks(unsigned clock_rate, unsigned ns)
335{
336 const unsigned int ssp_timeout_mul = 4096;
337 /*
338 * Calculate ticks in ms since ns are large numbers
339 * and might overflow
340 */
341 const unsigned int clock_per_ms = clock_rate / 1000;
342 const unsigned int ms = ns / 1000;
343 const unsigned int ticks = ms * clock_per_ms;
344 const unsigned int ssp_ticks = ticks / ssp_timeout_mul;
345
346 WARN_ON(ssp_ticks == 0);
347 return ssp_ticks;
348}
349
350static void mxs_mmc_adtc(struct mxs_mmc_host *host)
351{
352 struct mmc_command *cmd = host->cmd;
353 struct mmc_data *data = cmd->data;
354 struct dma_async_tx_descriptor *desc;
355 struct scatterlist *sgl = data->sg, *sg;
356 unsigned int sg_len = data->sg_len;
357 int i;
358
359 unsigned short dma_data_dir, timeout;
Vinod Koul05f57992011-10-14 10:45:11 +0530360 enum dma_transfer_direction slave_dirn;
Shawn Guoe4243f12011-02-21 18:35:28 +0800361 unsigned int data_size = 0, log2_blksz;
362 unsigned int blocks = data->blocks;
363
Marek Vasut829c1bf2012-08-03 17:26:09 +0200364 struct mxs_ssp *ssp = &host->ssp;
365
Shawn Guoe4243f12011-02-21 18:35:28 +0800366 u32 ignore_crc, get_resp, long_resp, read;
367 u32 ctrl0, cmd0, cmd1, val;
368
369 ignore_crc = (mmc_resp_type(cmd) & MMC_RSP_CRC) ?
370 0 : BM_SSP_CTRL0_IGNORE_CRC;
371 get_resp = (mmc_resp_type(cmd) & MMC_RSP_PRESENT) ?
372 BM_SSP_CTRL0_GET_RESP : 0;
373 long_resp = (mmc_resp_type(cmd) & MMC_RSP_136) ?
374 BM_SSP_CTRL0_LONG_RESP : 0;
375
376 if (data->flags & MMC_DATA_WRITE) {
377 dma_data_dir = DMA_TO_DEVICE;
Vinod Koul05f57992011-10-14 10:45:11 +0530378 slave_dirn = DMA_MEM_TO_DEV;
Shawn Guoe4243f12011-02-21 18:35:28 +0800379 read = 0;
380 } else {
381 dma_data_dir = DMA_FROM_DEVICE;
Vinod Koul05f57992011-10-14 10:45:11 +0530382 slave_dirn = DMA_DEV_TO_MEM;
Shawn Guoe4243f12011-02-21 18:35:28 +0800383 read = BM_SSP_CTRL0_READ;
384 }
385
386 ctrl0 = BF_SSP(host->bus_width, CTRL0_BUS_WIDTH) |
387 ignore_crc | get_resp | long_resp |
388 BM_SSP_CTRL0_DATA_XFER | read |
389 BM_SSP_CTRL0_WAIT_FOR_IRQ |
390 BM_SSP_CTRL0_ENABLE;
391
392 cmd0 = BF_SSP(cmd->opcode, CMD0_CMD);
393
394 /* get logarithm to base 2 of block size for setting register */
395 log2_blksz = ilog2(data->blksz);
396
397 /*
398 * take special care of the case that data size from data->sg
399 * is not equal to blocks x blksz
400 */
401 for_each_sg(sgl, sg, sg_len, i)
402 data_size += sg->length;
403
404 if (data_size != data->blocks * data->blksz)
405 blocks = 1;
406
407 /* xfer count, block size and count need to be set differently */
Marek Vasut829c1bf2012-08-03 17:26:09 +0200408 if (ssp_is_old(ssp)) {
Shawn Guoe4243f12011-02-21 18:35:28 +0800409 ctrl0 |= BF_SSP(data_size, CTRL0_XFER_COUNT);
410 cmd0 |= BF_SSP(log2_blksz, CMD0_BLOCK_SIZE) |
411 BF_SSP(blocks - 1, CMD0_BLOCK_COUNT);
412 } else {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200413 writel(data_size, ssp->base + HW_SSP_XFER_SIZE);
Shawn Guoe4243f12011-02-21 18:35:28 +0800414 writel(BF_SSP(log2_blksz, BLOCK_SIZE_BLOCK_SIZE) |
415 BF_SSP(blocks - 1, BLOCK_SIZE_BLOCK_COUNT),
Marek Vasut829c1bf2012-08-03 17:26:09 +0200416 ssp->base + HW_SSP_BLOCK_SIZE);
Shawn Guoe4243f12011-02-21 18:35:28 +0800417 }
418
419 if ((cmd->opcode == MMC_STOP_TRANSMISSION) ||
420 (cmd->opcode == SD_IO_RW_EXTENDED))
421 cmd0 |= BM_SSP_CMD0_APPEND_8CYC;
422
423 cmd1 = cmd->arg;
424
425 if (host->sdio_irq_en) {
426 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
427 cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
428 }
429
430 /* set the timeout count */
Marek Vasut829c1bf2012-08-03 17:26:09 +0200431 timeout = mxs_ns_to_ssp_ticks(ssp->clk_rate, data->timeout_ns);
432 val = readl(ssp->base + HW_SSP_TIMING(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800433 val &= ~(BM_SSP_TIMING_TIMEOUT);
434 val |= BF_SSP(timeout, TIMING_TIMEOUT);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200435 writel(val, ssp->base + HW_SSP_TIMING(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800436
437 /* pio */
Marek Vasut65defb92012-08-03 17:26:12 +0200438 ssp->ssp_pio_words[0] = ctrl0;
439 ssp->ssp_pio_words[1] = cmd0;
440 ssp->ssp_pio_words[2] = cmd1;
441 ssp->dma_dir = DMA_NONE;
442 ssp->slave_dirn = DMA_TRANS_NONE;
Shawn Guoe4243f12011-02-21 18:35:28 +0800443 desc = mxs_mmc_prep_dma(host, 0);
444 if (!desc)
445 goto out;
446
447 /* append data sg */
448 WARN_ON(host->data != NULL);
449 host->data = data;
Marek Vasut65defb92012-08-03 17:26:12 +0200450 ssp->dma_dir = dma_data_dir;
451 ssp->slave_dirn = slave_dirn;
Huang Shijie921de862012-02-16 14:17:33 +0800452 desc = mxs_mmc_prep_dma(host, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
Shawn Guoe4243f12011-02-21 18:35:28 +0800453 if (!desc)
454 goto out;
455
456 dmaengine_submit(desc);
Marek Vasut65defb92012-08-03 17:26:12 +0200457 dma_async_issue_pending(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800458 return;
459out:
460 dev_warn(mmc_dev(host->mmc),
461 "%s: failed to prep dma\n", __func__);
462}
463
464static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
465 struct mmc_command *cmd)
466{
467 host->cmd = cmd;
468
469 switch (mmc_cmd_type(cmd)) {
470 case MMC_CMD_BC:
471 mxs_mmc_bc(host);
472 break;
473 case MMC_CMD_BCR:
474 mxs_mmc_ac(host);
475 break;
476 case MMC_CMD_AC:
477 mxs_mmc_ac(host);
478 break;
479 case MMC_CMD_ADTC:
480 mxs_mmc_adtc(host);
481 break;
482 default:
483 dev_warn(mmc_dev(host->mmc),
484 "%s: unknown MMC command\n", __func__);
485 break;
486 }
487}
488
489static void mxs_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
490{
491 struct mxs_mmc_host *host = mmc_priv(mmc);
492
493 WARN_ON(host->mrq != NULL);
494 host->mrq = mrq;
495 mxs_mmc_start_cmd(host, mrq->cmd);
496}
497
Shawn Guoe4243f12011-02-21 18:35:28 +0800498static void mxs_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
499{
500 struct mxs_mmc_host *host = mmc_priv(mmc);
501
502 if (ios->bus_width == MMC_BUS_WIDTH_8)
503 host->bus_width = 2;
504 else if (ios->bus_width == MMC_BUS_WIDTH_4)
505 host->bus_width = 1;
506 else
507 host->bus_width = 0;
508
509 if (ios->clock)
Marek Vasut13082392012-08-03 17:26:10 +0200510 mxs_ssp_set_clk_rate(&host->ssp, ios->clock);
Shawn Guoe4243f12011-02-21 18:35:28 +0800511}
512
513static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
514{
515 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200516 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800517 unsigned long flags;
518
519 spin_lock_irqsave(&host->lock, flags);
520
521 host->sdio_irq_en = enable;
522
523 if (enable) {
524 writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200525 ssp->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_SET);
Shawn Guoe4243f12011-02-21 18:35:28 +0800526 writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
Marek Vasut4c5bb2e2012-10-01 20:52:43 +0000527 ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_SET);
Shawn Guoe4243f12011-02-21 18:35:28 +0800528 } else {
529 writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200530 ssp->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_CLR);
Shawn Guoe4243f12011-02-21 18:35:28 +0800531 writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200532 ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_CLR);
Shawn Guoe4243f12011-02-21 18:35:28 +0800533 }
534
535 spin_unlock_irqrestore(&host->lock, flags);
Lauri Hintsalafc108d22012-07-17 17:16:10 +0300536
Mark Brownac48f6c2012-09-25 13:41:02 +0100537 if (enable && readl(ssp->base + HW_SSP_STATUS(ssp)) &
Lauri Hintsalafc108d22012-07-17 17:16:10 +0300538 BM_SSP_STATUS_SDIO_IRQ)
539 mmc_signal_sdio_irq(host->mmc);
540
Shawn Guoe4243f12011-02-21 18:35:28 +0800541}
542
543static const struct mmc_host_ops mxs_mmc_ops = {
544 .request = mxs_mmc_request,
545 .get_ro = mxs_mmc_get_ro,
546 .get_cd = mxs_mmc_get_cd,
547 .set_ios = mxs_mmc_set_ios,
548 .enable_sdio_irq = mxs_mmc_enable_sdio_irq,
549};
550
551static bool mxs_mmc_dma_filter(struct dma_chan *chan, void *param)
552{
553 struct mxs_mmc_host *host = param;
Marek Vasut65defb92012-08-03 17:26:12 +0200554 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800555
556 if (!mxs_dma_is_apbh(chan))
557 return false;
558
Marek Vasut65defb92012-08-03 17:26:12 +0200559 if (chan->chan_id != ssp->dma_channel)
Shawn Guoe4243f12011-02-21 18:35:28 +0800560 return false;
561
Marek Vasut65defb92012-08-03 17:26:12 +0200562 chan->private = &ssp->dma_data;
Shawn Guoe4243f12011-02-21 18:35:28 +0800563
564 return true;
565}
566
Marek Vasut600a9912012-08-03 17:26:07 +0200567static struct platform_device_id mxs_ssp_ids[] = {
Shawn Guoef9b4d32012-05-05 20:24:01 +0800568 {
569 .name = "imx23-mmc",
Marek Vasut600a9912012-08-03 17:26:07 +0200570 .driver_data = IMX23_SSP,
Shawn Guoef9b4d32012-05-05 20:24:01 +0800571 }, {
572 .name = "imx28-mmc",
Marek Vasut600a9912012-08-03 17:26:07 +0200573 .driver_data = IMX28_SSP,
Shawn Guoef9b4d32012-05-05 20:24:01 +0800574 }, {
575 /* sentinel */
576 }
577};
Marek Vasut600a9912012-08-03 17:26:07 +0200578MODULE_DEVICE_TABLE(platform, mxs_ssp_ids);
Shawn Guoef9b4d32012-05-05 20:24:01 +0800579
Shawn Guo6de4d812012-05-06 13:30:44 +0800580static const struct of_device_id mxs_mmc_dt_ids[] = {
Marek Vasut600a9912012-08-03 17:26:07 +0200581 { .compatible = "fsl,imx23-mmc", .data = (void *) IMX23_SSP, },
582 { .compatible = "fsl,imx28-mmc", .data = (void *) IMX28_SSP, },
Shawn Guo6de4d812012-05-06 13:30:44 +0800583 { /* sentinel */ }
584};
585MODULE_DEVICE_TABLE(of, mxs_mmc_dt_ids);
586
Shawn Guoe4243f12011-02-21 18:35:28 +0800587static int mxs_mmc_probe(struct platform_device *pdev)
588{
Shawn Guo6de4d812012-05-06 13:30:44 +0800589 const struct of_device_id *of_id =
590 of_match_device(mxs_mmc_dt_ids, &pdev->dev);
591 struct device_node *np = pdev->dev.of_node;
Shawn Guoe4243f12011-02-21 18:35:28 +0800592 struct mxs_mmc_host *host;
593 struct mmc_host *mmc;
Shawn Guodf06bfc2012-05-06 11:20:40 +0800594 struct resource *iores, *dmares;
Shawn Guo9c92cf22012-05-06 22:56:16 +0800595 struct pinctrl *pinctrl;
Shawn Guoe4243f12011-02-21 18:35:28 +0800596 int ret = 0, irq_err, irq_dma;
597 dma_cap_mask_t mask;
Shawn Guo4dc5a792012-06-26 16:38:57 +0800598 struct regulator *reg_vmmc;
Marek Vasutb6e76f12012-07-19 11:11:39 -0400599 enum of_gpio_flags flags;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200600 struct mxs_ssp *ssp;
Fabio Estevamd6ed91a2012-10-31 09:22:58 -0200601 u32 bus_width = 0;
Shawn Guoe4243f12011-02-21 18:35:28 +0800602
603 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
604 dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
605 irq_err = platform_get_irq(pdev, 0);
606 irq_dma = platform_get_irq(pdev, 1);
Shawn Guo6de4d812012-05-06 13:30:44 +0800607 if (!iores || irq_err < 0 || irq_dma < 0)
Shawn Guoe4243f12011-02-21 18:35:28 +0800608 return -EINVAL;
609
Shawn Guoe4243f12011-02-21 18:35:28 +0800610 mmc = mmc_alloc_host(sizeof(struct mxs_mmc_host), &pdev->dev);
Shawn Guodf06bfc2012-05-06 11:20:40 +0800611 if (!mmc)
612 return -ENOMEM;
Shawn Guoe4243f12011-02-21 18:35:28 +0800613
614 host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200615 ssp = &host->ssp;
616 ssp->dev = &pdev->dev;
Thierry Redinga3e2cd72013-01-21 11:09:11 +0100617 ssp->base = devm_ioremap_resource(&pdev->dev, iores);
618 if (IS_ERR(ssp->base)) {
619 ret = PTR_ERR(ssp->base);
Shawn Guoe4243f12011-02-21 18:35:28 +0800620 goto out_mmc_free;
621 }
622
Shawn Guo6de4d812012-05-06 13:30:44 +0800623 if (np) {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200624 ssp->devid = (enum mxs_ssp_id) of_id->data;
Shawn Guo6de4d812012-05-06 13:30:44 +0800625 /*
626 * TODO: This is a temporary solution and should be changed
627 * to use generic DMA binding later when the helpers get in.
628 */
629 ret = of_property_read_u32(np, "fsl,ssp-dma-channel",
Marek Vasut65defb92012-08-03 17:26:12 +0200630 &ssp->dma_channel);
Shawn Guo6de4d812012-05-06 13:30:44 +0800631 if (ret) {
632 dev_err(mmc_dev(host->mmc),
633 "failed to get dma channel\n");
634 goto out_mmc_free;
635 }
636 } else {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200637 ssp->devid = pdev->id_entry->driver_data;
Marek Vasut65defb92012-08-03 17:26:12 +0200638 ssp->dma_channel = dmares->start;
Shawn Guo6de4d812012-05-06 13:30:44 +0800639 }
640
Shawn Guoe4243f12011-02-21 18:35:28 +0800641 host->mmc = mmc;
Shawn Guoe4243f12011-02-21 18:35:28 +0800642 host->sdio_irq_en = 0;
643
Shawn Guo4dc5a792012-06-26 16:38:57 +0800644 reg_vmmc = devm_regulator_get(&pdev->dev, "vmmc");
645 if (!IS_ERR(reg_vmmc)) {
646 ret = regulator_enable(reg_vmmc);
647 if (ret) {
648 dev_err(&pdev->dev,
649 "Failed to enable vmmc regulator: %d\n", ret);
650 goto out_mmc_free;
651 }
652 }
653
Shawn Guo9c92cf22012-05-06 22:56:16 +0800654 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
655 if (IS_ERR(pinctrl)) {
656 ret = PTR_ERR(pinctrl);
Shawn Guo6de4d812012-05-06 13:30:44 +0800657 goto out_mmc_free;
Shawn Guo9c92cf22012-05-06 22:56:16 +0800658 }
659
Marek Vasut829c1bf2012-08-03 17:26:09 +0200660 ssp->clk = clk_get(&pdev->dev, NULL);
661 if (IS_ERR(ssp->clk)) {
662 ret = PTR_ERR(ssp->clk);
Shawn Guodf06bfc2012-05-06 11:20:40 +0800663 goto out_mmc_free;
Shawn Guoe4243f12011-02-21 18:35:28 +0800664 }
Marek Vasut829c1bf2012-08-03 17:26:09 +0200665 clk_prepare_enable(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800666
667 mxs_mmc_reset(host);
668
669 dma_cap_zero(mask);
670 dma_cap_set(DMA_SLAVE, mask);
Marek Vasut65defb92012-08-03 17:26:12 +0200671 ssp->dma_data.chan_irq = irq_dma;
672 ssp->dmach = dma_request_channel(mask, mxs_mmc_dma_filter, host);
673 if (!ssp->dmach) {
Shawn Guoe4243f12011-02-21 18:35:28 +0800674 dev_err(mmc_dev(host->mmc),
675 "%s: failed to request dma\n", __func__);
676 goto out_clk_put;
677 }
678
679 /* set mmc core parameters */
680 mmc->ops = &mxs_mmc_ops;
681 mmc->caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |
682 MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL;
683
Fabio Estevamd6ed91a2012-10-31 09:22:58 -0200684 of_property_read_u32(np, "bus-width", &bus_width);
685 if (bus_width == 4)
686 mmc->caps |= MMC_CAP_4_BIT_DATA;
687 else if (bus_width == 8)
688 mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
689 host->wp_gpio = of_get_named_gpio_flags(np, "wp-gpios", 0, &flags);
690
691 if (flags & OF_GPIO_ACTIVE_LOW)
692 host->wp_inverted = 1;
Shawn Guoe4243f12011-02-21 18:35:28 +0800693
694 mmc->f_min = 400000;
695 mmc->f_max = 288000000;
696 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
697
698 mmc->max_segs = 52;
699 mmc->max_blk_size = 1 << 0xf;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200700 mmc->max_blk_count = (ssp_is_old(ssp)) ? 0xff : 0xffffff;
701 mmc->max_req_size = (ssp_is_old(ssp)) ? 0xffff : 0xffffffff;
Marek Vasut65defb92012-08-03 17:26:12 +0200702 mmc->max_seg_size = dma_get_max_seg_size(ssp->dmach->device->dev);
Shawn Guoe4243f12011-02-21 18:35:28 +0800703
704 platform_set_drvdata(pdev, mmc);
705
Shawn Guodf06bfc2012-05-06 11:20:40 +0800706 ret = devm_request_irq(&pdev->dev, irq_err, mxs_mmc_irq_handler, 0,
707 DRIVER_NAME, host);
Shawn Guoe4243f12011-02-21 18:35:28 +0800708 if (ret)
709 goto out_free_dma;
710
711 spin_lock_init(&host->lock);
712
713 ret = mmc_add_host(mmc);
714 if (ret)
Shawn Guodf06bfc2012-05-06 11:20:40 +0800715 goto out_free_dma;
Shawn Guoe4243f12011-02-21 18:35:28 +0800716
717 dev_info(mmc_dev(host->mmc), "initialized\n");
718
719 return 0;
720
Shawn Guoe4243f12011-02-21 18:35:28 +0800721out_free_dma:
Marek Vasut65defb92012-08-03 17:26:12 +0200722 if (ssp->dmach)
723 dma_release_channel(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800724out_clk_put:
Marek Vasut829c1bf2012-08-03 17:26:09 +0200725 clk_disable_unprepare(ssp->clk);
726 clk_put(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800727out_mmc_free:
728 mmc_free_host(mmc);
Shawn Guoe4243f12011-02-21 18:35:28 +0800729 return ret;
730}
731
732static int mxs_mmc_remove(struct platform_device *pdev)
733{
734 struct mmc_host *mmc = platform_get_drvdata(pdev);
735 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200736 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800737
738 mmc_remove_host(mmc);
739
Shawn Guoe4243f12011-02-21 18:35:28 +0800740 platform_set_drvdata(pdev, NULL);
741
Marek Vasut65defb92012-08-03 17:26:12 +0200742 if (ssp->dmach)
743 dma_release_channel(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800744
Marek Vasut829c1bf2012-08-03 17:26:09 +0200745 clk_disable_unprepare(ssp->clk);
746 clk_put(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800747
Shawn Guoe4243f12011-02-21 18:35:28 +0800748 mmc_free_host(mmc);
749
Shawn Guoe4243f12011-02-21 18:35:28 +0800750 return 0;
751}
752
753#ifdef CONFIG_PM
754static int mxs_mmc_suspend(struct device *dev)
755{
756 struct mmc_host *mmc = dev_get_drvdata(dev);
757 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200758 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800759 int ret = 0;
760
761 ret = mmc_suspend_host(mmc);
762
Marek Vasut829c1bf2012-08-03 17:26:09 +0200763 clk_disable_unprepare(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800764
765 return ret;
766}
767
768static int mxs_mmc_resume(struct device *dev)
769{
770 struct mmc_host *mmc = dev_get_drvdata(dev);
771 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200772 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800773 int ret = 0;
774
Marek Vasut829c1bf2012-08-03 17:26:09 +0200775 clk_prepare_enable(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800776
777 ret = mmc_resume_host(mmc);
778
779 return ret;
780}
781
782static const struct dev_pm_ops mxs_mmc_pm_ops = {
783 .suspend = mxs_mmc_suspend,
784 .resume = mxs_mmc_resume,
785};
786#endif
787
788static struct platform_driver mxs_mmc_driver = {
789 .probe = mxs_mmc_probe,
790 .remove = mxs_mmc_remove,
Marek Vasut600a9912012-08-03 17:26:07 +0200791 .id_table = mxs_ssp_ids,
Shawn Guoe4243f12011-02-21 18:35:28 +0800792 .driver = {
793 .name = DRIVER_NAME,
794 .owner = THIS_MODULE,
795#ifdef CONFIG_PM
796 .pm = &mxs_mmc_pm_ops,
797#endif
Marek Vasuta3e545e2012-05-21 06:33:27 +0200798 .of_match_table = mxs_mmc_dt_ids,
Shawn Guoe4243f12011-02-21 18:35:28 +0800799 },
800};
801
Axel Lind1f81a642011-11-26 12:55:43 +0800802module_platform_driver(mxs_mmc_driver);
Shawn Guoe4243f12011-02-21 18:35:28 +0800803
804MODULE_DESCRIPTION("FREESCALE MXS MMC peripheral");
805MODULE_AUTHOR("Freescale Semiconductor");
806MODULE_LICENSE("GPL");