blob: b334e81c5cab7d3a9c3cf7d9d68eb00225286746 [file] [log] [blame]
Thomas Gleixner16216332019-05-19 15:51:31 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Shawn Guoe4243f12011-02-21 18:35:28 +08002/*
3 * Portions copyright (C) 2003 Russell King, PXA MMCI Driver
4 * Portions copyright (C) 2004-2005 Pierre Ossman, W83L51xD SD/MMC driver
5 *
6 * Copyright 2008 Embedded Alley Solutions, Inc.
7 * Copyright 2009-2011 Freescale Semiconductor, Inc.
Shawn Guoe4243f12011-02-21 18:35:28 +08008 */
9
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/ioport.h>
Shawn Guo6de4d812012-05-06 13:30:44 +080013#include <linux/of.h>
14#include <linux/of_device.h>
Shawn Guoe4243f12011-02-21 18:35:28 +080015#include <linux/platform_device.h>
16#include <linux/delay.h>
17#include <linux/interrupt.h>
18#include <linux/dma-mapping.h>
19#include <linux/dmaengine.h>
20#include <linux/highmem.h>
21#include <linux/clk.h>
22#include <linux/err.h>
23#include <linux/completion.h>
24#include <linux/mmc/host.h>
25#include <linux/mmc/mmc.h>
26#include <linux/mmc/sdio.h>
Sascha Hauerabd37cc2013-12-05 14:34:50 +010027#include <linux/mmc/slot-gpio.h>
Shawn Guoe4243f12011-02-21 18:35:28 +080028#include <linux/regulator/consumer.h>
Paul Gortmaker88b47672011-07-03 15:15:51 -040029#include <linux/module.h>
Shawn Guo70e60202012-05-05 19:40:09 +080030#include <linux/stmp_device.h>
Marek Vasut8be3d3b2012-08-03 17:26:06 +020031#include <linux/spi/mxs-spi.h>
Shawn Guoe4243f12011-02-21 18:35:28 +080032
33#define DRIVER_NAME "mxs-mmc"
34
Shawn Guoe4243f12011-02-21 18:35:28 +080035#define MXS_MMC_IRQ_BITS (BM_SSP_CTRL1_SDIO_IRQ | \
36 BM_SSP_CTRL1_RESP_ERR_IRQ | \
37 BM_SSP_CTRL1_RESP_TIMEOUT_IRQ | \
38 BM_SSP_CTRL1_DATA_TIMEOUT_IRQ | \
39 BM_SSP_CTRL1_DATA_CRC_IRQ | \
40 BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ | \
41 BM_SSP_CTRL1_RECV_TIMEOUT_IRQ | \
42 BM_SSP_CTRL1_FIFO_OVERRUN_IRQ)
43
Marek Vasut8be3d3b2012-08-03 17:26:06 +020044/* card detect polling timeout */
45#define MXS_MMC_DETECT_TIMEOUT (HZ/2)
Shawn Guoef9b4d32012-05-05 20:24:01 +080046
Shawn Guoe4243f12011-02-21 18:35:28 +080047struct mxs_mmc_host {
Marek Vasut829c1bf2012-08-03 17:26:09 +020048 struct mxs_ssp ssp;
49
Shawn Guoe4243f12011-02-21 18:35:28 +080050 struct mmc_host *mmc;
51 struct mmc_request *mrq;
52 struct mmc_command *cmd;
53 struct mmc_data *data;
54
Shawn Guoe4243f12011-02-21 18:35:28 +080055 unsigned char bus_width;
56 spinlock_t lock;
57 int sdio_irq_en;
Daniel Willmann91769982014-04-19 23:59:18 +020058 bool broken_cd;
Shawn Guoe4243f12011-02-21 18:35:28 +080059};
60
Shawn Guoe4243f12011-02-21 18:35:28 +080061static int mxs_mmc_get_cd(struct mmc_host *mmc)
62{
63 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +020064 struct mxs_ssp *ssp = &host->ssp;
Sascha Hauerd1a1dfb2013-12-05 14:34:51 +010065 int present, ret;
66
Daniel Willmann91769982014-04-19 23:59:18 +020067 if (host->broken_cd)
68 return -ENOSYS;
69
Sascha Hauerd1a1dfb2013-12-05 14:34:51 +010070 ret = mmc_gpio_get_cd(mmc);
71 if (ret >= 0)
72 return ret;
Shawn Guoe4243f12011-02-21 18:35:28 +080073
Roman Peniaev6f726f42014-06-10 23:57:02 +090074 present = mmc->caps & MMC_CAP_NEEDS_POLL ||
75 !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
Sascha Hauer6c3331d2013-12-05 14:34:49 +010076 BM_SSP_STATUS_CARD_DETECT);
77
78 if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)
79 present = !present;
80
81 return present;
Shawn Guoe4243f12011-02-21 18:35:28 +080082}
83
Fabio Estevam02c18c42013-07-03 17:02:38 -030084static int mxs_mmc_reset(struct mxs_mmc_host *host)
Shawn Guoe4243f12011-02-21 18:35:28 +080085{
Marek Vasut829c1bf2012-08-03 17:26:09 +020086 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +080087 u32 ctrl0, ctrl1;
Fabio Estevam02c18c42013-07-03 17:02:38 -030088 int ret;
Shawn Guoe4243f12011-02-21 18:35:28 +080089
Fabio Estevam02c18c42013-07-03 17:02:38 -030090 ret = stmp_reset_block(ssp->base);
91 if (ret)
92 return ret;
Shawn Guoe4243f12011-02-21 18:35:28 +080093
94 ctrl0 = BM_SSP_CTRL0_IGNORE_CRC;
95 ctrl1 = BF_SSP(0x3, CTRL1_SSP_MODE) |
96 BF_SSP(0x7, CTRL1_WORD_LENGTH) |
97 BM_SSP_CTRL1_DMA_ENABLE |
98 BM_SSP_CTRL1_POLARITY |
99 BM_SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
100 BM_SSP_CTRL1_DATA_CRC_IRQ_EN |
101 BM_SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
102 BM_SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
103 BM_SSP_CTRL1_RESP_ERR_IRQ_EN;
104
105 writel(BF_SSP(0xffff, TIMING_TIMEOUT) |
106 BF_SSP(2, TIMING_CLOCK_DIVIDE) |
107 BF_SSP(0, TIMING_CLOCK_RATE),
Marek Vasut829c1bf2012-08-03 17:26:09 +0200108 ssp->base + HW_SSP_TIMING(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800109
110 if (host->sdio_irq_en) {
111 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
112 ctrl1 |= BM_SSP_CTRL1_SDIO_IRQ_EN;
113 }
114
Marek Vasut829c1bf2012-08-03 17:26:09 +0200115 writel(ctrl0, ssp->base + HW_SSP_CTRL0);
116 writel(ctrl1, ssp->base + HW_SSP_CTRL1(ssp));
Fabio Estevam02c18c42013-07-03 17:02:38 -0300117 return 0;
Shawn Guoe4243f12011-02-21 18:35:28 +0800118}
119
120static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
121 struct mmc_command *cmd);
122
123static void mxs_mmc_request_done(struct mxs_mmc_host *host)
124{
125 struct mmc_command *cmd = host->cmd;
126 struct mmc_data *data = host->data;
127 struct mmc_request *mrq = host->mrq;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200128 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800129
130 if (mmc_resp_type(cmd) & MMC_RSP_PRESENT) {
131 if (mmc_resp_type(cmd) & MMC_RSP_136) {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200132 cmd->resp[3] = readl(ssp->base + HW_SSP_SDRESP0(ssp));
133 cmd->resp[2] = readl(ssp->base + HW_SSP_SDRESP1(ssp));
134 cmd->resp[1] = readl(ssp->base + HW_SSP_SDRESP2(ssp));
135 cmd->resp[0] = readl(ssp->base + HW_SSP_SDRESP3(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800136 } else {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200137 cmd->resp[0] = readl(ssp->base + HW_SSP_SDRESP0(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800138 }
139 }
140
Stefan Wahren73a85062017-01-14 17:29:18 +0000141 if (cmd == mrq->sbc) {
142 /* Finished CMD23, now send actual command. */
143 mxs_mmc_start_cmd(host, mrq->cmd);
144 return;
145 } else if (data) {
Shawn Guoe4243f12011-02-21 18:35:28 +0800146 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
Marek Vasut65defb92012-08-03 17:26:12 +0200147 data->sg_len, ssp->dma_dir);
Shawn Guoe4243f12011-02-21 18:35:28 +0800148 /*
149 * If there was an error on any block, we mark all
150 * data blocks as being in error.
151 */
152 if (!data->error)
153 data->bytes_xfered = data->blocks * data->blksz;
154 else
155 data->bytes_xfered = 0;
156
157 host->data = NULL;
Stefan Wahren73a85062017-01-14 17:29:18 +0000158 if (data->stop && (data->error || !mrq->sbc)) {
Shawn Guoe4243f12011-02-21 18:35:28 +0800159 mxs_mmc_start_cmd(host, mrq->stop);
160 return;
161 }
162 }
163
164 host->mrq = NULL;
165 mmc_request_done(host->mmc, mrq);
166}
167
168static void mxs_mmc_dma_irq_callback(void *param)
169{
170 struct mxs_mmc_host *host = param;
171
172 mxs_mmc_request_done(host);
173}
174
175static irqreturn_t mxs_mmc_irq_handler(int irq, void *dev_id)
176{
177 struct mxs_mmc_host *host = dev_id;
178 struct mmc_command *cmd = host->cmd;
179 struct mmc_data *data = host->data;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200180 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800181 u32 stat;
182
183 spin_lock(&host->lock);
184
Marek Vasut829c1bf2012-08-03 17:26:09 +0200185 stat = readl(ssp->base + HW_SSP_CTRL1(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800186 writel(stat & MXS_MMC_IRQ_BITS,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200187 ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_CLR);
Shawn Guoe4243f12011-02-21 18:35:28 +0800188
Lauri Hintsala1af36b22012-07-17 17:16:09 +0300189 spin_unlock(&host->lock);
190
Shawn Guoe4243f12011-02-21 18:35:28 +0800191 if ((stat & BM_SSP_CTRL1_SDIO_IRQ) && (stat & BM_SSP_CTRL1_SDIO_IRQ_EN))
192 mmc_signal_sdio_irq(host->mmc);
193
Shawn Guoe4243f12011-02-21 18:35:28 +0800194 if (stat & BM_SSP_CTRL1_RESP_TIMEOUT_IRQ)
195 cmd->error = -ETIMEDOUT;
196 else if (stat & BM_SSP_CTRL1_RESP_ERR_IRQ)
197 cmd->error = -EIO;
198
199 if (data) {
200 if (stat & (BM_SSP_CTRL1_DATA_TIMEOUT_IRQ |
201 BM_SSP_CTRL1_RECV_TIMEOUT_IRQ))
202 data->error = -ETIMEDOUT;
203 else if (stat & BM_SSP_CTRL1_DATA_CRC_IRQ)
204 data->error = -EILSEQ;
205 else if (stat & (BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ |
206 BM_SSP_CTRL1_FIFO_OVERRUN_IRQ))
207 data->error = -EIO;
208 }
209
210 return IRQ_HANDLED;
211}
212
213static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
Huang Shijie921de862012-02-16 14:17:33 +0800214 struct mxs_mmc_host *host, unsigned long flags)
Shawn Guoe4243f12011-02-21 18:35:28 +0800215{
Marek Vasut65defb92012-08-03 17:26:12 +0200216 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800217 struct dma_async_tx_descriptor *desc;
218 struct mmc_data *data = host->data;
219 struct scatterlist * sgl;
220 unsigned int sg_len;
221
222 if (data) {
223 /* data */
224 dma_map_sg(mmc_dev(host->mmc), data->sg,
Marek Vasut65defb92012-08-03 17:26:12 +0200225 data->sg_len, ssp->dma_dir);
Shawn Guoe4243f12011-02-21 18:35:28 +0800226 sgl = data->sg;
227 sg_len = data->sg_len;
228 } else {
229 /* pio */
Marek Vasut65defb92012-08-03 17:26:12 +0200230 sgl = (struct scatterlist *) ssp->ssp_pio_words;
Shawn Guoe4243f12011-02-21 18:35:28 +0800231 sg_len = SSP_PIO_NUM;
232 }
233
Marek Vasut65defb92012-08-03 17:26:12 +0200234 desc = dmaengine_prep_slave_sg(ssp->dmach,
235 sgl, sg_len, ssp->slave_dirn, flags);
Shawn Guoe4243f12011-02-21 18:35:28 +0800236 if (desc) {
237 desc->callback = mxs_mmc_dma_irq_callback;
238 desc->callback_param = host;
239 } else {
240 if (data)
241 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
Marek Vasut65defb92012-08-03 17:26:12 +0200242 data->sg_len, ssp->dma_dir);
Shawn Guoe4243f12011-02-21 18:35:28 +0800243 }
244
245 return desc;
246}
247
248static void mxs_mmc_bc(struct mxs_mmc_host *host)
249{
Marek Vasut65defb92012-08-03 17:26:12 +0200250 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800251 struct mmc_command *cmd = host->cmd;
252 struct dma_async_tx_descriptor *desc;
253 u32 ctrl0, cmd0, cmd1;
254
255 ctrl0 = BM_SSP_CTRL0_ENABLE | BM_SSP_CTRL0_IGNORE_CRC;
256 cmd0 = BF_SSP(cmd->opcode, CMD0_CMD) | BM_SSP_CMD0_APPEND_8CYC;
257 cmd1 = cmd->arg;
258
259 if (host->sdio_irq_en) {
260 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
261 cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
262 }
263
Marek Vasut65defb92012-08-03 17:26:12 +0200264 ssp->ssp_pio_words[0] = ctrl0;
265 ssp->ssp_pio_words[1] = cmd0;
266 ssp->ssp_pio_words[2] = cmd1;
267 ssp->dma_dir = DMA_NONE;
268 ssp->slave_dirn = DMA_TRANS_NONE;
Huang Shijie921de862012-02-16 14:17:33 +0800269 desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK);
Shawn Guoe4243f12011-02-21 18:35:28 +0800270 if (!desc)
271 goto out;
272
273 dmaengine_submit(desc);
Marek Vasut65defb92012-08-03 17:26:12 +0200274 dma_async_issue_pending(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800275 return;
276
277out:
278 dev_warn(mmc_dev(host->mmc),
279 "%s: failed to prep dma\n", __func__);
280}
281
282static void mxs_mmc_ac(struct mxs_mmc_host *host)
283{
Marek Vasut65defb92012-08-03 17:26:12 +0200284 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800285 struct mmc_command *cmd = host->cmd;
286 struct dma_async_tx_descriptor *desc;
287 u32 ignore_crc, get_resp, long_resp;
288 u32 ctrl0, cmd0, cmd1;
289
290 ignore_crc = (mmc_resp_type(cmd) & MMC_RSP_CRC) ?
291 0 : BM_SSP_CTRL0_IGNORE_CRC;
292 get_resp = (mmc_resp_type(cmd) & MMC_RSP_PRESENT) ?
293 BM_SSP_CTRL0_GET_RESP : 0;
294 long_resp = (mmc_resp_type(cmd) & MMC_RSP_136) ?
295 BM_SSP_CTRL0_LONG_RESP : 0;
296
297 ctrl0 = BM_SSP_CTRL0_ENABLE | ignore_crc | get_resp | long_resp;
298 cmd0 = BF_SSP(cmd->opcode, CMD0_CMD);
299 cmd1 = cmd->arg;
300
Stefan Wahren01167c72017-01-05 19:24:04 +0000301 if (cmd->opcode == MMC_STOP_TRANSMISSION)
302 cmd0 |= BM_SSP_CMD0_APPEND_8CYC;
303
Shawn Guoe4243f12011-02-21 18:35:28 +0800304 if (host->sdio_irq_en) {
305 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
306 cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
307 }
308
Marek Vasut65defb92012-08-03 17:26:12 +0200309 ssp->ssp_pio_words[0] = ctrl0;
310 ssp->ssp_pio_words[1] = cmd0;
311 ssp->ssp_pio_words[2] = cmd1;
312 ssp->dma_dir = DMA_NONE;
313 ssp->slave_dirn = DMA_TRANS_NONE;
Huang Shijie921de862012-02-16 14:17:33 +0800314 desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK);
Shawn Guoe4243f12011-02-21 18:35:28 +0800315 if (!desc)
316 goto out;
317
318 dmaengine_submit(desc);
Marek Vasut65defb92012-08-03 17:26:12 +0200319 dma_async_issue_pending(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800320 return;
321
322out:
323 dev_warn(mmc_dev(host->mmc),
324 "%s: failed to prep dma\n", __func__);
325}
326
327static unsigned short mxs_ns_to_ssp_ticks(unsigned clock_rate, unsigned ns)
328{
329 const unsigned int ssp_timeout_mul = 4096;
330 /*
331 * Calculate ticks in ms since ns are large numbers
332 * and might overflow
333 */
334 const unsigned int clock_per_ms = clock_rate / 1000;
335 const unsigned int ms = ns / 1000;
336 const unsigned int ticks = ms * clock_per_ms;
337 const unsigned int ssp_ticks = ticks / ssp_timeout_mul;
338
339 WARN_ON(ssp_ticks == 0);
340 return ssp_ticks;
341}
342
343static void mxs_mmc_adtc(struct mxs_mmc_host *host)
344{
345 struct mmc_command *cmd = host->cmd;
346 struct mmc_data *data = cmd->data;
347 struct dma_async_tx_descriptor *desc;
348 struct scatterlist *sgl = data->sg, *sg;
349 unsigned int sg_len = data->sg_len;
Fabio Estevamfd63ac72013-01-07 22:42:35 -0200350 unsigned int i;
Shawn Guoe4243f12011-02-21 18:35:28 +0800351
352 unsigned short dma_data_dir, timeout;
Vinod Koul05f57992011-10-14 10:45:11 +0530353 enum dma_transfer_direction slave_dirn;
Shawn Guoe4243f12011-02-21 18:35:28 +0800354 unsigned int data_size = 0, log2_blksz;
355 unsigned int blocks = data->blocks;
356
Marek Vasut829c1bf2012-08-03 17:26:09 +0200357 struct mxs_ssp *ssp = &host->ssp;
358
Shawn Guoe4243f12011-02-21 18:35:28 +0800359 u32 ignore_crc, get_resp, long_resp, read;
360 u32 ctrl0, cmd0, cmd1, val;
361
362 ignore_crc = (mmc_resp_type(cmd) & MMC_RSP_CRC) ?
363 0 : BM_SSP_CTRL0_IGNORE_CRC;
364 get_resp = (mmc_resp_type(cmd) & MMC_RSP_PRESENT) ?
365 BM_SSP_CTRL0_GET_RESP : 0;
366 long_resp = (mmc_resp_type(cmd) & MMC_RSP_136) ?
367 BM_SSP_CTRL0_LONG_RESP : 0;
368
369 if (data->flags & MMC_DATA_WRITE) {
370 dma_data_dir = DMA_TO_DEVICE;
Vinod Koul05f57992011-10-14 10:45:11 +0530371 slave_dirn = DMA_MEM_TO_DEV;
Shawn Guoe4243f12011-02-21 18:35:28 +0800372 read = 0;
373 } else {
374 dma_data_dir = DMA_FROM_DEVICE;
Vinod Koul05f57992011-10-14 10:45:11 +0530375 slave_dirn = DMA_DEV_TO_MEM;
Shawn Guoe4243f12011-02-21 18:35:28 +0800376 read = BM_SSP_CTRL0_READ;
377 }
378
379 ctrl0 = BF_SSP(host->bus_width, CTRL0_BUS_WIDTH) |
380 ignore_crc | get_resp | long_resp |
381 BM_SSP_CTRL0_DATA_XFER | read |
382 BM_SSP_CTRL0_WAIT_FOR_IRQ |
383 BM_SSP_CTRL0_ENABLE;
384
385 cmd0 = BF_SSP(cmd->opcode, CMD0_CMD);
386
387 /* get logarithm to base 2 of block size for setting register */
388 log2_blksz = ilog2(data->blksz);
389
390 /*
391 * take special care of the case that data size from data->sg
392 * is not equal to blocks x blksz
393 */
394 for_each_sg(sgl, sg, sg_len, i)
395 data_size += sg->length;
396
397 if (data_size != data->blocks * data->blksz)
398 blocks = 1;
399
400 /* xfer count, block size and count need to be set differently */
Marek Vasut829c1bf2012-08-03 17:26:09 +0200401 if (ssp_is_old(ssp)) {
Shawn Guoe4243f12011-02-21 18:35:28 +0800402 ctrl0 |= BF_SSP(data_size, CTRL0_XFER_COUNT);
403 cmd0 |= BF_SSP(log2_blksz, CMD0_BLOCK_SIZE) |
404 BF_SSP(blocks - 1, CMD0_BLOCK_COUNT);
405 } else {
Marek Vasut829c1bf2012-08-03 17:26:09 +0200406 writel(data_size, ssp->base + HW_SSP_XFER_SIZE);
Shawn Guoe4243f12011-02-21 18:35:28 +0800407 writel(BF_SSP(log2_blksz, BLOCK_SIZE_BLOCK_SIZE) |
408 BF_SSP(blocks - 1, BLOCK_SIZE_BLOCK_COUNT),
Marek Vasut829c1bf2012-08-03 17:26:09 +0200409 ssp->base + HW_SSP_BLOCK_SIZE);
Shawn Guoe4243f12011-02-21 18:35:28 +0800410 }
411
Stefan Wahren01167c72017-01-05 19:24:04 +0000412 if (cmd->opcode == SD_IO_RW_EXTENDED)
Shawn Guoe4243f12011-02-21 18:35:28 +0800413 cmd0 |= BM_SSP_CMD0_APPEND_8CYC;
414
415 cmd1 = cmd->arg;
416
417 if (host->sdio_irq_en) {
418 ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
419 cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
420 }
421
422 /* set the timeout count */
Marek Vasut829c1bf2012-08-03 17:26:09 +0200423 timeout = mxs_ns_to_ssp_ticks(ssp->clk_rate, data->timeout_ns);
424 val = readl(ssp->base + HW_SSP_TIMING(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800425 val &= ~(BM_SSP_TIMING_TIMEOUT);
426 val |= BF_SSP(timeout, TIMING_TIMEOUT);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200427 writel(val, ssp->base + HW_SSP_TIMING(ssp));
Shawn Guoe4243f12011-02-21 18:35:28 +0800428
429 /* pio */
Marek Vasut65defb92012-08-03 17:26:12 +0200430 ssp->ssp_pio_words[0] = ctrl0;
431 ssp->ssp_pio_words[1] = cmd0;
432 ssp->ssp_pio_words[2] = cmd1;
433 ssp->dma_dir = DMA_NONE;
434 ssp->slave_dirn = DMA_TRANS_NONE;
Shawn Guoe4243f12011-02-21 18:35:28 +0800435 desc = mxs_mmc_prep_dma(host, 0);
436 if (!desc)
437 goto out;
438
439 /* append data sg */
440 WARN_ON(host->data != NULL);
441 host->data = data;
Marek Vasut65defb92012-08-03 17:26:12 +0200442 ssp->dma_dir = dma_data_dir;
443 ssp->slave_dirn = slave_dirn;
Huang Shijie921de862012-02-16 14:17:33 +0800444 desc = mxs_mmc_prep_dma(host, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
Shawn Guoe4243f12011-02-21 18:35:28 +0800445 if (!desc)
446 goto out;
447
448 dmaengine_submit(desc);
Marek Vasut65defb92012-08-03 17:26:12 +0200449 dma_async_issue_pending(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800450 return;
451out:
452 dev_warn(mmc_dev(host->mmc),
453 "%s: failed to prep dma\n", __func__);
454}
455
456static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
457 struct mmc_command *cmd)
458{
459 host->cmd = cmd;
460
461 switch (mmc_cmd_type(cmd)) {
462 case MMC_CMD_BC:
463 mxs_mmc_bc(host);
464 break;
465 case MMC_CMD_BCR:
466 mxs_mmc_ac(host);
467 break;
468 case MMC_CMD_AC:
469 mxs_mmc_ac(host);
470 break;
471 case MMC_CMD_ADTC:
472 mxs_mmc_adtc(host);
473 break;
474 default:
475 dev_warn(mmc_dev(host->mmc),
476 "%s: unknown MMC command\n", __func__);
477 break;
478 }
479}
480
481static void mxs_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
482{
483 struct mxs_mmc_host *host = mmc_priv(mmc);
484
485 WARN_ON(host->mrq != NULL);
486 host->mrq = mrq;
Stefan Wahren73a85062017-01-14 17:29:18 +0000487
488 if (mrq->sbc)
489 mxs_mmc_start_cmd(host, mrq->sbc);
490 else
491 mxs_mmc_start_cmd(host, mrq->cmd);
Shawn Guoe4243f12011-02-21 18:35:28 +0800492}
493
Shawn Guoe4243f12011-02-21 18:35:28 +0800494static void mxs_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
495{
496 struct mxs_mmc_host *host = mmc_priv(mmc);
497
498 if (ios->bus_width == MMC_BUS_WIDTH_8)
499 host->bus_width = 2;
500 else if (ios->bus_width == MMC_BUS_WIDTH_4)
501 host->bus_width = 1;
502 else
503 host->bus_width = 0;
504
505 if (ios->clock)
Marek Vasut13082392012-08-03 17:26:10 +0200506 mxs_ssp_set_clk_rate(&host->ssp, ios->clock);
Shawn Guoe4243f12011-02-21 18:35:28 +0800507}
508
509static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
510{
511 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200512 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800513 unsigned long flags;
514
515 spin_lock_irqsave(&host->lock, flags);
516
517 host->sdio_irq_en = enable;
518
519 if (enable) {
520 writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200521 ssp->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_SET);
Shawn Guoe4243f12011-02-21 18:35:28 +0800522 writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
Marek Vasut4c5bb2e2012-10-01 20:52:43 +0000523 ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_SET);
Shawn Guoe4243f12011-02-21 18:35:28 +0800524 } else {
525 writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200526 ssp->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_CLR);
Shawn Guoe4243f12011-02-21 18:35:28 +0800527 writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
Marek Vasut829c1bf2012-08-03 17:26:09 +0200528 ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_CLR);
Shawn Guoe4243f12011-02-21 18:35:28 +0800529 }
530
531 spin_unlock_irqrestore(&host->lock, flags);
Lauri Hintsalafc108d22012-07-17 17:16:10 +0300532
Mark Brownac48f6c2012-09-25 13:41:02 +0100533 if (enable && readl(ssp->base + HW_SSP_STATUS(ssp)) &
Lauri Hintsalafc108d22012-07-17 17:16:10 +0300534 BM_SSP_STATUS_SDIO_IRQ)
535 mmc_signal_sdio_irq(host->mmc);
536
Shawn Guoe4243f12011-02-21 18:35:28 +0800537}
538
539static const struct mmc_host_ops mxs_mmc_ops = {
540 .request = mxs_mmc_request,
Sascha Hauerabd37cc2013-12-05 14:34:50 +0100541 .get_ro = mmc_gpio_get_ro,
Shawn Guoe4243f12011-02-21 18:35:28 +0800542 .get_cd = mxs_mmc_get_cd,
543 .set_ios = mxs_mmc_set_ios,
544 .enable_sdio_irq = mxs_mmc_enable_sdio_irq,
545};
546
Krzysztof Kozlowskif61fcc32015-05-02 00:49:18 +0900547static const struct platform_device_id mxs_ssp_ids[] = {
Shawn Guoef9b4d32012-05-05 20:24:01 +0800548 {
549 .name = "imx23-mmc",
Marek Vasut600a9912012-08-03 17:26:07 +0200550 .driver_data = IMX23_SSP,
Shawn Guoef9b4d32012-05-05 20:24:01 +0800551 }, {
552 .name = "imx28-mmc",
Marek Vasut600a9912012-08-03 17:26:07 +0200553 .driver_data = IMX28_SSP,
Shawn Guoef9b4d32012-05-05 20:24:01 +0800554 }, {
555 /* sentinel */
556 }
557};
Marek Vasut600a9912012-08-03 17:26:07 +0200558MODULE_DEVICE_TABLE(platform, mxs_ssp_ids);
Shawn Guoef9b4d32012-05-05 20:24:01 +0800559
Shawn Guo6de4d812012-05-06 13:30:44 +0800560static const struct of_device_id mxs_mmc_dt_ids[] = {
Marek Vasut600a9912012-08-03 17:26:07 +0200561 { .compatible = "fsl,imx23-mmc", .data = (void *) IMX23_SSP, },
562 { .compatible = "fsl,imx28-mmc", .data = (void *) IMX28_SSP, },
Shawn Guo6de4d812012-05-06 13:30:44 +0800563 { /* sentinel */ }
564};
565MODULE_DEVICE_TABLE(of, mxs_mmc_dt_ids);
566
Shawn Guoe4243f12011-02-21 18:35:28 +0800567static int mxs_mmc_probe(struct platform_device *pdev)
568{
Shawn Guo6de4d812012-05-06 13:30:44 +0800569 const struct of_device_id *of_id =
570 of_match_device(mxs_mmc_dt_ids, &pdev->dev);
Daniel Willmann91769982014-04-19 23:59:18 +0200571 struct device_node *np = pdev->dev.of_node;
Shawn Guoe4243f12011-02-21 18:35:28 +0800572 struct mxs_mmc_host *host;
573 struct mmc_host *mmc;
Shawn Guo0e91e432013-02-26 10:10:38 +0800574 struct resource *iores;
Sascha Hauerd1a1dfb2013-12-05 14:34:51 +0100575 int ret = 0, irq_err;
Shawn Guo4dc5a792012-06-26 16:38:57 +0800576 struct regulator *reg_vmmc;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200577 struct mxs_ssp *ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800578
Shawn Guoe4243f12011-02-21 18:35:28 +0800579 irq_err = platform_get_irq(pdev, 0);
Fabio Estevamc3cd5c072014-11-19 11:16:57 -0200580 if (irq_err < 0)
Fabio Estevam5654d902014-11-19 11:16:58 -0200581 return irq_err;
Shawn Guoe4243f12011-02-21 18:35:28 +0800582
Shawn Guoe4243f12011-02-21 18:35:28 +0800583 mmc = mmc_alloc_host(sizeof(struct mxs_mmc_host), &pdev->dev);
Shawn Guodf06bfc2012-05-06 11:20:40 +0800584 if (!mmc)
585 return -ENOMEM;
Shawn Guoe4243f12011-02-21 18:35:28 +0800586
587 host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200588 ssp = &host->ssp;
589 ssp->dev = &pdev->dev;
Fabio Estevamc3cd5c072014-11-19 11:16:57 -0200590 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Thierry Redinga3e2cd72013-01-21 11:09:11 +0100591 ssp->base = devm_ioremap_resource(&pdev->dev, iores);
592 if (IS_ERR(ssp->base)) {
593 ret = PTR_ERR(ssp->base);
Shawn Guoe4243f12011-02-21 18:35:28 +0800594 goto out_mmc_free;
595 }
596
Shawn Guo0e91e432013-02-26 10:10:38 +0800597 ssp->devid = (enum mxs_ssp_id) of_id->data;
Shawn Guo6de4d812012-05-06 13:30:44 +0800598
Shawn Guoe4243f12011-02-21 18:35:28 +0800599 host->mmc = mmc;
Shawn Guoe4243f12011-02-21 18:35:28 +0800600 host->sdio_irq_en = 0;
601
Shawn Guo4dc5a792012-06-26 16:38:57 +0800602 reg_vmmc = devm_regulator_get(&pdev->dev, "vmmc");
603 if (!IS_ERR(reg_vmmc)) {
604 ret = regulator_enable(reg_vmmc);
605 if (ret) {
606 dev_err(&pdev->dev,
607 "Failed to enable vmmc regulator: %d\n", ret);
608 goto out_mmc_free;
609 }
610 }
611
Fabio Estevama5adbff2013-07-03 17:02:37 -0300612 ssp->clk = devm_clk_get(&pdev->dev, NULL);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200613 if (IS_ERR(ssp->clk)) {
614 ret = PTR_ERR(ssp->clk);
Shawn Guodf06bfc2012-05-06 11:20:40 +0800615 goto out_mmc_free;
Shawn Guoe4243f12011-02-21 18:35:28 +0800616 }
Fabio Estevame34d4672014-11-19 11:16:59 -0200617 ret = clk_prepare_enable(ssp->clk);
618 if (ret)
619 goto out_mmc_free;
Shawn Guoe4243f12011-02-21 18:35:28 +0800620
Fabio Estevam02c18c42013-07-03 17:02:38 -0300621 ret = mxs_mmc_reset(host);
622 if (ret) {
623 dev_err(&pdev->dev, "Failed to reset mmc: %d\n", ret);
624 goto out_clk_disable;
625 }
Shawn Guoe4243f12011-02-21 18:35:28 +0800626
Shawn Guo0e91e432013-02-26 10:10:38 +0800627 ssp->dmach = dma_request_slave_channel(&pdev->dev, "rx-tx");
Marek Vasut65defb92012-08-03 17:26:12 +0200628 if (!ssp->dmach) {
Shawn Guoe4243f12011-02-21 18:35:28 +0800629 dev_err(mmc_dev(host->mmc),
630 "%s: failed to request dma\n", __func__);
Wei Yongjun0c5ce162013-04-19 10:11:11 +0800631 ret = -ENODEV;
Fabio Estevama5adbff2013-07-03 17:02:37 -0300632 goto out_clk_disable;
Shawn Guoe4243f12011-02-21 18:35:28 +0800633 }
634
635 /* set mmc core parameters */
636 mmc->ops = &mxs_mmc_ops;
637 mmc->caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |
Stefan Wahren8dcf48e2019-03-14 17:18:22 +0100638 MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL | MMC_CAP_CMD23 |
639 MMC_CAP_ERASE;
Shawn Guoe4243f12011-02-21 18:35:28 +0800640
Daniel Willmann91769982014-04-19 23:59:18 +0200641 host->broken_cd = of_property_read_bool(np, "broken-cd");
642
Shawn Guoe4243f12011-02-21 18:35:28 +0800643 mmc->f_min = 400000;
644 mmc->f_max = 288000000;
Sascha Hauerd1a1dfb2013-12-05 14:34:51 +0100645
646 ret = mmc_of_parse(mmc);
647 if (ret)
648 goto out_clk_disable;
649
Shawn Guoe4243f12011-02-21 18:35:28 +0800650 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
651
652 mmc->max_segs = 52;
653 mmc->max_blk_size = 1 << 0xf;
Marek Vasut829c1bf2012-08-03 17:26:09 +0200654 mmc->max_blk_count = (ssp_is_old(ssp)) ? 0xff : 0xffffff;
655 mmc->max_req_size = (ssp_is_old(ssp)) ? 0xffff : 0xffffffff;
Marek Vasut65defb92012-08-03 17:26:12 +0200656 mmc->max_seg_size = dma_get_max_seg_size(ssp->dmach->device->dev);
Shawn Guoe4243f12011-02-21 18:35:28 +0800657
658 platform_set_drvdata(pdev, mmc);
659
Fabio Estevamf91346e2016-11-05 17:45:07 -0200660 spin_lock_init(&host->lock);
661
Shawn Guodf06bfc2012-05-06 11:20:40 +0800662 ret = devm_request_irq(&pdev->dev, irq_err, mxs_mmc_irq_handler, 0,
Fabio Estevamcc87a352014-11-18 00:37:12 -0200663 dev_name(&pdev->dev), host);
Shawn Guoe4243f12011-02-21 18:35:28 +0800664 if (ret)
665 goto out_free_dma;
666
Shawn Guoe4243f12011-02-21 18:35:28 +0800667 ret = mmc_add_host(mmc);
668 if (ret)
Shawn Guodf06bfc2012-05-06 11:20:40 +0800669 goto out_free_dma;
Shawn Guoe4243f12011-02-21 18:35:28 +0800670
671 dev_info(mmc_dev(host->mmc), "initialized\n");
672
673 return 0;
674
Shawn Guoe4243f12011-02-21 18:35:28 +0800675out_free_dma:
Dan Carpenter9ef219c52014-12-17 02:57:50 +0300676 dma_release_channel(ssp->dmach);
Fabio Estevama5adbff2013-07-03 17:02:37 -0300677out_clk_disable:
Marek Vasut829c1bf2012-08-03 17:26:09 +0200678 clk_disable_unprepare(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800679out_mmc_free:
680 mmc_free_host(mmc);
Shawn Guoe4243f12011-02-21 18:35:28 +0800681 return ret;
682}
683
684static int mxs_mmc_remove(struct platform_device *pdev)
685{
686 struct mmc_host *mmc = platform_get_drvdata(pdev);
687 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200688 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800689
690 mmc_remove_host(mmc);
691
Marek Vasut65defb92012-08-03 17:26:12 +0200692 if (ssp->dmach)
693 dma_release_channel(ssp->dmach);
Shawn Guoe4243f12011-02-21 18:35:28 +0800694
Marek Vasut829c1bf2012-08-03 17:26:09 +0200695 clk_disable_unprepare(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800696
Shawn Guoe4243f12011-02-21 18:35:28 +0800697 mmc_free_host(mmc);
698
Shawn Guoe4243f12011-02-21 18:35:28 +0800699 return 0;
700}
701
Fabio Estevamd1355292014-11-18 00:43:39 -0200702#ifdef CONFIG_PM_SLEEP
Shawn Guoe4243f12011-02-21 18:35:28 +0800703static int mxs_mmc_suspend(struct device *dev)
704{
705 struct mmc_host *mmc = dev_get_drvdata(dev);
706 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200707 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800708
Marek Vasut829c1bf2012-08-03 17:26:09 +0200709 clk_disable_unprepare(ssp->clk);
Ulf Hansson68359072013-09-25 15:21:53 +0200710 return 0;
Shawn Guoe4243f12011-02-21 18:35:28 +0800711}
712
713static int mxs_mmc_resume(struct device *dev)
714{
715 struct mmc_host *mmc = dev_get_drvdata(dev);
716 struct mxs_mmc_host *host = mmc_priv(mmc);
Marek Vasut829c1bf2012-08-03 17:26:09 +0200717 struct mxs_ssp *ssp = &host->ssp;
Shawn Guoe4243f12011-02-21 18:35:28 +0800718
Fabio Estevame34d4672014-11-19 11:16:59 -0200719 return clk_prepare_enable(ssp->clk);
Shawn Guoe4243f12011-02-21 18:35:28 +0800720}
Shawn Guoe4243f12011-02-21 18:35:28 +0800721#endif
722
Fabio Estevamd1355292014-11-18 00:43:39 -0200723static SIMPLE_DEV_PM_OPS(mxs_mmc_pm_ops, mxs_mmc_suspend, mxs_mmc_resume);
724
Shawn Guoe4243f12011-02-21 18:35:28 +0800725static struct platform_driver mxs_mmc_driver = {
726 .probe = mxs_mmc_probe,
727 .remove = mxs_mmc_remove,
Marek Vasut600a9912012-08-03 17:26:07 +0200728 .id_table = mxs_ssp_ids,
Shawn Guoe4243f12011-02-21 18:35:28 +0800729 .driver = {
730 .name = DRIVER_NAME,
Shawn Guoe4243f12011-02-21 18:35:28 +0800731 .pm = &mxs_mmc_pm_ops,
Marek Vasuta3e545e2012-05-21 06:33:27 +0200732 .of_match_table = mxs_mmc_dt_ids,
Shawn Guoe4243f12011-02-21 18:35:28 +0800733 },
734};
735
Axel Lind1f81a642011-11-26 12:55:43 +0800736module_platform_driver(mxs_mmc_driver);
Shawn Guoe4243f12011-02-21 18:35:28 +0800737
738MODULE_DESCRIPTION("FREESCALE MXS MMC peripheral");
739MODULE_AUTHOR("Freescale Semiconductor");
740MODULE_LICENSE("GPL");
Fabio Estevame7be4342013-01-07 20:41:52 -0200741MODULE_ALIAS("platform:" DRIVER_NAME);