1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Freescale i.MX28 SSP MMC driver
4 *
5 * Copyright (C) 2019 DENX Software Engineering
6 * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
7 *
8 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
9 * on behalf of DENX Software Engineering GmbH
10 *
11 * Based on code from LTIB:
12 * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
13 * Terry Lv
14 *
15 * Copyright 2007, Freescale Semiconductor, Inc
16 * Andy Fleming
17 *
18 * Based vaguely on the pxa mmc code:
19 * (C) Copyright 2003
20 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
21 */
22
23 #include <common.h>
24 #include <log.h>
25 #include <malloc.h>
26 #include <mmc.h>
27 #include <linux/bitops.h>
28 #include <linux/delay.h>
29 #include <linux/errno.h>
30 #include <asm/io.h>
31 #include <asm/arch/clock.h>
32 #include <asm/arch/imx-regs.h>
33 #include <asm/arch/sys_proto.h>
34 #include <asm/mach-imx/dma.h>
35 #include <bouncebuf.h>
36
37 #define MXSMMC_MAX_TIMEOUT 10000
38 #define MXSMMC_SMALL_TRANSFER 512
39
40 #if !CONFIG_IS_ENABLED(DM_MMC)
41 struct mxsmmc_priv {
42 int id;
43 int (*mmc_is_wp)(int);
44 int (*mmc_cd)(int);
45 struct mmc_config cfg; /* mmc configuration */
46 struct mxs_dma_desc *desc;
47 uint32_t buswidth;
48 struct mxs_ssp_regs *regs;
49 };
50 #else /* CONFIG_IS_ENABLED(DM_MMC) */
51 #include <dm/device.h>
52 #include <dm/read.h>
53 #include <dt-structs.h>
54
55 struct mxsmmc_plat {
56 #if CONFIG_IS_ENABLED(OF_PLATDATA)
57 struct dtd_fsl_imx23_mmc dtplat;
58 #endif
59 struct mmc_config cfg;
60 struct mmc mmc;
61 fdt_addr_t base;
62 int non_removable;
63 int buswidth;
64 int dma_id;
65 int clk_id;
66 };
67
68 struct mxsmmc_priv {
69 int clkid;
70 struct mxs_dma_desc *desc;
71 u32 buswidth;
72 struct mxs_ssp_regs *regs;
73 unsigned int dma_channel;
74 };
75 #endif
76
77 #if !CONFIG_IS_ENABLED(DM_MMC)
78 static int mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
79 struct mmc_data *data);
80
mxsmmc_cd(struct mxsmmc_priv * priv)81 static int mxsmmc_cd(struct mxsmmc_priv *priv)
82 {
83 struct mxs_ssp_regs *ssp_regs = priv->regs;
84
85 if (priv->mmc_cd)
86 return priv->mmc_cd(priv->id);
87
88 return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
89 }
90
mxsmmc_set_ios(struct mmc * mmc)91 static int mxsmmc_set_ios(struct mmc *mmc)
92 {
93 struct mxsmmc_priv *priv = mmc->priv;
94 struct mxs_ssp_regs *ssp_regs = priv->regs;
95
96 /* Set the clock speed */
97 if (mmc->clock)
98 mxs_set_ssp_busclock(priv->id, mmc->clock / 1000);
99
100 switch (mmc->bus_width) {
101 case 1:
102 priv->buswidth = SSP_CTRL0_BUS_WIDTH_ONE_BIT;
103 break;
104 case 4:
105 priv->buswidth = SSP_CTRL0_BUS_WIDTH_FOUR_BIT;
106 break;
107 case 8:
108 priv->buswidth = SSP_CTRL0_BUS_WIDTH_EIGHT_BIT;
109 break;
110 }
111
112 /* Set the bus width */
113 clrsetbits_le32(&ssp_regs->hw_ssp_ctrl0,
114 SSP_CTRL0_BUS_WIDTH_MASK, priv->buswidth);
115
116 debug("MMC%d: Set %d bits bus width\n",
117 mmc->block_dev.devnum, mmc->bus_width);
118
119 return 0;
120 }
121
mxsmmc_init(struct mmc * mmc)122 static int mxsmmc_init(struct mmc *mmc)
123 {
124 struct mxsmmc_priv *priv = mmc->priv;
125 struct mxs_ssp_regs *ssp_regs = priv->regs;
126
127 /* Reset SSP */
128 mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
129
130 /* Reconfigure the SSP block for MMC operation */
131 writel(SSP_CTRL1_SSP_MODE_SD_MMC |
132 SSP_CTRL1_WORD_LENGTH_EIGHT_BITS |
133 SSP_CTRL1_DMA_ENABLE |
134 SSP_CTRL1_POLARITY |
135 SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
136 SSP_CTRL1_DATA_CRC_IRQ_EN |
137 SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
138 SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
139 SSP_CTRL1_RESP_ERR_IRQ_EN,
140 &ssp_regs->hw_ssp_ctrl1_set);
141
142 /* Set initial bit clock 400 KHz */
143 mxs_set_ssp_busclock(priv->id, 400);
144
145 /* Send initial 74 clock cycles (185 us @ 400 KHz)*/
146 writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
147 udelay(200);
148 writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_clr);
149
150 return 0;
151 }
152
153 static const struct mmc_ops mxsmmc_ops = {
154 .send_cmd = mxsmmc_send_cmd,
155 .set_ios = mxsmmc_set_ios,
156 .init = mxsmmc_init,
157 };
158
mxsmmc_initialize(struct bd_info * bis,int id,int (* wp)(int),int (* cd)(int))159 int mxsmmc_initialize(struct bd_info *bis, int id, int (*wp)(int),
160 int (*cd)(int))
161 {
162 struct mmc *mmc = NULL;
163 struct mxsmmc_priv *priv = NULL;
164 int ret;
165 const unsigned int mxsmmc_clk_id = mxs_ssp_clock_by_bus(id);
166
167 if (!mxs_ssp_bus_id_valid(id))
168 return -ENODEV;
169
170 priv = malloc(sizeof(struct mxsmmc_priv));
171 if (!priv)
172 return -ENOMEM;
173
174 priv->desc = mxs_dma_desc_alloc();
175 if (!priv->desc) {
176 free(priv);
177 return -ENOMEM;
178 }
179
180 ret = mxs_dma_init_channel(MXS_DMA_CHANNEL_AHB_APBH_SSP0 + id);
181 if (ret)
182 return ret;
183
184 priv->mmc_is_wp = wp;
185 priv->mmc_cd = cd;
186 priv->id = id;
187 priv->regs = mxs_ssp_regs_by_bus(id);
188
189 priv->cfg.name = "MXS MMC";
190 priv->cfg.ops = &mxsmmc_ops;
191
192 priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
193
194 priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
195 MMC_MODE_HS_52MHz | MMC_MODE_HS;
196
197 /*
198 * SSPCLK = 480 * 18 / 29 / 1 = 297.731 MHz
199 * SSP bit rate = SSPCLK / (CLOCK_DIVIDE * (1 + CLOCK_RATE)),
200 * CLOCK_DIVIDE has to be an even value from 2 to 254, and
201 * CLOCK_RATE could be any integer from 0 to 255.
202 */
203 priv->cfg.f_min = 400000;
204 priv->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id)
205 * 1000 / 2;
206 priv->cfg.b_max = 0x20;
207
208 mmc = mmc_create(&priv->cfg, priv);
209 if (!mmc) {
210 mxs_dma_desc_free(priv->desc);
211 free(priv);
212 return -ENOMEM;
213 }
214 return 0;
215 }
216 #endif /* CONFIG_IS_ENABLED(DM_MMC) */
217
mxsmmc_send_cmd_pio(struct mxsmmc_priv * priv,struct mmc_data * data)218 static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data)
219 {
220 struct mxs_ssp_regs *ssp_regs = priv->regs;
221 uint32_t *data_ptr;
222 int timeout = MXSMMC_MAX_TIMEOUT;
223 uint32_t reg;
224 uint32_t data_count = data->blocksize * data->blocks;
225
226 if (data->flags & MMC_DATA_READ) {
227 data_ptr = (uint32_t *)data->dest;
228 while (data_count && --timeout) {
229 reg = readl(&ssp_regs->hw_ssp_status);
230 if (!(reg & SSP_STATUS_FIFO_EMPTY)) {
231 *data_ptr++ = readl(&ssp_regs->hw_ssp_data);
232 data_count -= 4;
233 timeout = MXSMMC_MAX_TIMEOUT;
234 } else
235 udelay(1000);
236 }
237 } else {
238 data_ptr = (uint32_t *)data->src;
239 timeout *= 100;
240 while (data_count && --timeout) {
241 reg = readl(&ssp_regs->hw_ssp_status);
242 if (!(reg & SSP_STATUS_FIFO_FULL)) {
243 writel(*data_ptr++, &ssp_regs->hw_ssp_data);
244 data_count -= 4;
245 timeout = MXSMMC_MAX_TIMEOUT;
246 } else
247 udelay(1000);
248 }
249 }
250
251 return timeout ? 0 : -ECOMM;
252 }
253
mxsmmc_send_cmd_dma(struct mxsmmc_priv * priv,struct mmc_data * data)254 static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
255 {
256 uint32_t data_count = data->blocksize * data->blocks;
257 int dmach;
258 struct mxs_dma_desc *desc = priv->desc;
259 void *addr;
260 unsigned int flags;
261 struct bounce_buffer bbstate;
262
263 memset(desc, 0, sizeof(struct mxs_dma_desc));
264 desc->address = (dma_addr_t)desc;
265
266 if (data->flags & MMC_DATA_READ) {
267 priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_WRITE;
268 addr = data->dest;
269 flags = GEN_BB_WRITE;
270 } else {
271 priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_READ;
272 addr = (void *)data->src;
273 flags = GEN_BB_READ;
274 }
275
276 bounce_buffer_start(&bbstate, addr, data_count, flags);
277
278 priv->desc->cmd.address = (dma_addr_t)bbstate.bounce_buffer;
279
280 priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM |
281 (data_count << MXS_DMA_DESC_BYTES_OFFSET);
282
283 #if !CONFIG_IS_ENABLED(DM_MMC)
284 dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id;
285 #else
286 dmach = priv->dma_channel;
287 #endif
288 mxs_dma_desc_append(dmach, priv->desc);
289 if (mxs_dma_go(dmach)) {
290 bounce_buffer_stop(&bbstate);
291 return -ECOMM;
292 }
293
294 bounce_buffer_stop(&bbstate);
295
296 return 0;
297 }
298
299 #if !CONFIG_IS_ENABLED(DM_MMC)
300 /*
301 * Sends a command out on the bus. Takes the mmc pointer,
302 * a command pointer, and an optional data pointer.
303 */
304 static int
mxsmmc_send_cmd(struct mmc * mmc,struct mmc_cmd * cmd,struct mmc_data * data)305 mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
306 {
307 struct mxsmmc_priv *priv = mmc->priv;
308 struct mxs_ssp_regs *ssp_regs = priv->regs;
309 #else
310 static int
311 mxsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data)
312 {
313 struct mxsmmc_plat *plat = dev_get_plat(dev);
314 struct mxsmmc_priv *priv = dev_get_priv(dev);
315 struct mxs_ssp_regs *ssp_regs = priv->regs;
316 struct mmc *mmc = &plat->mmc;
317 #endif
318 uint32_t reg;
319 int timeout;
320 uint32_t ctrl0;
321 int ret;
322 #if !CONFIG_IS_ENABLED(DM_MMC)
323 int devnum = mmc->block_dev.devnum;
324 #else
325 int devnum = mmc_get_blk_desc(mmc)->devnum;
326 #endif
327 debug("MMC%d: CMD%d\n", devnum, cmd->cmdidx);
328
329 /* Check bus busy */
330 timeout = MXSMMC_MAX_TIMEOUT;
331 while (--timeout) {
332 udelay(1000);
333 reg = readl(&ssp_regs->hw_ssp_status);
334 if (!(reg &
335 (SSP_STATUS_BUSY | SSP_STATUS_DATA_BUSY |
336 SSP_STATUS_CMD_BUSY))) {
337 break;
338 }
339 }
340
341 if (!timeout) {
342 printf("MMC%d: Bus busy timeout!\n", devnum);
343 return -ETIMEDOUT;
344 }
345 #if !CONFIG_IS_ENABLED(DM_MMC)
346 /* See if card is present */
347 if (!mxsmmc_cd(priv)) {
348 printf("MMC%d: No card detected!\n", devnum);
349 return -ENOMEDIUM;
350 }
351 #endif
352 /* Start building CTRL0 contents */
353 ctrl0 = priv->buswidth;
354
355 /* Set up command */
356 if (!(cmd->resp_type & MMC_RSP_CRC))
357 ctrl0 |= SSP_CTRL0_IGNORE_CRC;
358 if (cmd->resp_type & MMC_RSP_PRESENT) /* Need to get response */
359 ctrl0 |= SSP_CTRL0_GET_RESP;
360 if (cmd->resp_type & MMC_RSP_136) /* It's a 136 bits response */
361 ctrl0 |= SSP_CTRL0_LONG_RESP;
362
363 if (data && (data->blocksize * data->blocks < MXSMMC_SMALL_TRANSFER))
364 writel(SSP_CTRL1_DMA_ENABLE, &ssp_regs->hw_ssp_ctrl1_clr);
365 else
366 writel(SSP_CTRL1_DMA_ENABLE, &ssp_regs->hw_ssp_ctrl1_set);
367
368 /* Command index */
369 reg = readl(&ssp_regs->hw_ssp_cmd0);
370 reg &= ~(SSP_CMD0_CMD_MASK | SSP_CMD0_APPEND_8CYC);
371 reg |= cmd->cmdidx << SSP_CMD0_CMD_OFFSET;
372 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
373 reg |= SSP_CMD0_APPEND_8CYC;
374 writel(reg, &ssp_regs->hw_ssp_cmd0);
375
376 /* Command argument */
377 writel(cmd->cmdarg, &ssp_regs->hw_ssp_cmd1);
378
379 /* Set up data */
380 if (data) {
381 /* READ or WRITE */
382 if (data->flags & MMC_DATA_READ) {
383 ctrl0 |= SSP_CTRL0_READ;
384 #if !CONFIG_IS_ENABLED(DM_MMC)
385 } else if (priv->mmc_is_wp &&
386 priv->mmc_is_wp(devnum)) {
387 printf("MMC%d: Can not write a locked card!\n", devnum);
388 return -EOPNOTSUPP;
389 #endif
390 }
391 ctrl0 |= SSP_CTRL0_DATA_XFER;
392
393 reg = data->blocksize * data->blocks;
394 #if defined(CONFIG_MX23)
395 ctrl0 |= reg & SSP_CTRL0_XFER_COUNT_MASK;
396
397 clrsetbits_le32(&ssp_regs->hw_ssp_cmd0,
398 SSP_CMD0_BLOCK_SIZE_MASK | SSP_CMD0_BLOCK_COUNT_MASK,
399 ((data->blocks - 1) << SSP_CMD0_BLOCK_COUNT_OFFSET) |
400 ((ffs(data->blocksize) - 1) <<
401 SSP_CMD0_BLOCK_SIZE_OFFSET));
402 #elif defined(CONFIG_MX28)
403 writel(reg, &ssp_regs->hw_ssp_xfer_size);
404
405 reg = ((data->blocks - 1) <<
406 SSP_BLOCK_SIZE_BLOCK_COUNT_OFFSET) |
407 ((ffs(data->blocksize) - 1) <<
408 SSP_BLOCK_SIZE_BLOCK_SIZE_OFFSET);
409 writel(reg, &ssp_regs->hw_ssp_block_size);
410 #endif
411 }
412
413 /* Kick off the command */
414 ctrl0 |= SSP_CTRL0_WAIT_FOR_IRQ | SSP_CTRL0_ENABLE | SSP_CTRL0_RUN;
415 writel(ctrl0, &ssp_regs->hw_ssp_ctrl0);
416
417 /* Wait for the command to complete */
418 timeout = MXSMMC_MAX_TIMEOUT;
419 while (--timeout) {
420 udelay(1000);
421 reg = readl(&ssp_regs->hw_ssp_status);
422 if (!(reg & SSP_STATUS_CMD_BUSY))
423 break;
424 }
425
426 if (!timeout) {
427 printf("MMC%d: Command %d busy\n", devnum, cmd->cmdidx);
428 return -ETIMEDOUT;
429 }
430
431 /* Check command timeout */
432 if (reg & SSP_STATUS_RESP_TIMEOUT) {
433 debug("MMC%d: Command %d timeout (status 0x%08x)\n",
434 devnum, cmd->cmdidx, reg);
435 return -ETIMEDOUT;
436 }
437
438 /* Check command errors */
439 if (reg & (SSP_STATUS_RESP_CRC_ERR | SSP_STATUS_RESP_ERR)) {
440 printf("MMC%d: Command %d error (status 0x%08x)!\n",
441 devnum, cmd->cmdidx, reg);
442 return -ECOMM;
443 }
444
445 /* Copy response to response buffer */
446 if (cmd->resp_type & MMC_RSP_136) {
447 cmd->response[3] = readl(&ssp_regs->hw_ssp_sdresp0);
448 cmd->response[2] = readl(&ssp_regs->hw_ssp_sdresp1);
449 cmd->response[1] = readl(&ssp_regs->hw_ssp_sdresp2);
450 cmd->response[0] = readl(&ssp_regs->hw_ssp_sdresp3);
451 } else
452 cmd->response[0] = readl(&ssp_regs->hw_ssp_sdresp0);
453
454 /* Return if no data to process */
455 if (!data)
456 return 0;
457
458 if (data->blocksize * data->blocks < MXSMMC_SMALL_TRANSFER) {
459 ret = mxsmmc_send_cmd_pio(priv, data);
460 if (ret) {
461 printf("MMC%d: Data timeout with command %d "
462 "(status 0x%08x)!\n", devnum, cmd->cmdidx, reg);
463 return ret;
464 }
465 } else {
466 ret = mxsmmc_send_cmd_dma(priv, data);
467 if (ret) {
468 printf("MMC%d: DMA transfer failed\n", devnum);
469 return ret;
470 }
471 }
472
473 /* Check data errors */
474 reg = readl(&ssp_regs->hw_ssp_status);
475 if (reg &
476 (SSP_STATUS_TIMEOUT | SSP_STATUS_DATA_CRC_ERR |
477 SSP_STATUS_FIFO_OVRFLW | SSP_STATUS_FIFO_UNDRFLW)) {
478 printf("MMC%d: Data error with command %d (status 0x%08x)!\n",
479 devnum, cmd->cmdidx, reg);
480 return -ECOMM;
481 }
482
483 return 0;
484 }
485
486 #if CONFIG_IS_ENABLED(DM_MMC)
487 /* Base numbers of i.MX2[38] clk for ssp0 IP block */
488 #define MXS_SSP_IMX23_CLKID_SSP0 33
489 #define MXS_SSP_IMX28_CLKID_SSP0 46
490
491 static int mxsmmc_get_cd(struct udevice *dev)
492 {
493 struct mxsmmc_plat *plat = dev_get_plat(dev);
494 struct mxsmmc_priv *priv = dev_get_priv(dev);
495 struct mxs_ssp_regs *ssp_regs = priv->regs;
496
497 if (plat->non_removable)
498 return 1;
499
500 return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
501 }
502
503 static int mxsmmc_set_ios(struct udevice *dev)
504 {
505 struct mxsmmc_plat *plat = dev_get_plat(dev);
506 struct mxsmmc_priv *priv = dev_get_priv(dev);
507 struct mxs_ssp_regs *ssp_regs = priv->regs;
508 struct mmc *mmc = &plat->mmc;
509
510 /* Set the clock speed */
511 if (mmc->clock)
512 mxs_set_ssp_busclock(priv->clkid, mmc->clock / 1000);
513
514 switch (mmc->bus_width) {
515 case 1:
516 priv->buswidth = SSP_CTRL0_BUS_WIDTH_ONE_BIT;
517 break;
518 case 4:
519 priv->buswidth = SSP_CTRL0_BUS_WIDTH_FOUR_BIT;
520 break;
521 case 8:
522 priv->buswidth = SSP_CTRL0_BUS_WIDTH_EIGHT_BIT;
523 break;
524 }
525
526 /* Set the bus width */
527 clrsetbits_le32(&ssp_regs->hw_ssp_ctrl0,
528 SSP_CTRL0_BUS_WIDTH_MASK, priv->buswidth);
529
530 debug("MMC%d: Set %d bits bus width\n", mmc_get_blk_desc(mmc)->devnum,
531 mmc->bus_width);
532
533 return 0;
534 }
535
536 static int mxsmmc_init(struct udevice *dev)
537 {
538 struct mxsmmc_priv *priv = dev_get_priv(dev);
539 struct mxs_ssp_regs *ssp_regs = priv->regs;
540
541 /* Reset SSP */
542 mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
543
544 /* Reconfigure the SSP block for MMC operation */
545 writel(SSP_CTRL1_SSP_MODE_SD_MMC |
546 SSP_CTRL1_WORD_LENGTH_EIGHT_BITS |
547 SSP_CTRL1_DMA_ENABLE |
548 SSP_CTRL1_POLARITY |
549 SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
550 SSP_CTRL1_DATA_CRC_IRQ_EN |
551 SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
552 SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
553 SSP_CTRL1_RESP_ERR_IRQ_EN,
554 &ssp_regs->hw_ssp_ctrl1_set);
555
556 /* Set initial bit clock 400 KHz */
557 mxs_set_ssp_busclock(priv->clkid, 400);
558
559 /* Send initial 74 clock cycles (185 us @ 400 KHz)*/
560 writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
561 udelay(200);
562 writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_clr);
563
564 return 0;
565 }
566
567 static int mxsmmc_probe(struct udevice *dev)
568 {
569 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
570 struct mxsmmc_plat *plat = dev_get_plat(dev);
571 struct mxsmmc_priv *priv = dev_get_priv(dev);
572 struct blk_desc *bdesc;
573 struct mmc *mmc;
574 int ret, clkid;
575
576 debug("%s: probe\n", __func__);
577
578 #if CONFIG_IS_ENABLED(OF_PLATDATA)
579 struct dtd_fsl_imx23_mmc *dtplat = &plat->dtplat;
580 struct phandle_1_arg *p1a = &dtplat->clocks[0];
581
582 priv->buswidth = dtplat->bus_width;
583 priv->regs = (struct mxs_ssp_regs *)dtplat->reg[0];
584 priv->dma_channel = dtplat->dmas[1];
585 clkid = p1a->arg[0];
586 plat->non_removable = dtplat->non_removable;
587
588 debug("OF_PLATDATA: regs: 0x%p bw: %d clkid: %d non_removable: %d\n",
589 priv->regs, priv->buswidth, clkid, plat->non_removable);
590 #else
591 priv->regs = (struct mxs_ssp_regs *)plat->base;
592 priv->dma_channel = plat->dma_id;
593 clkid = plat->clk_id;
594 #endif
595
596 #ifdef CONFIG_MX28
597 priv->clkid = clkid - MXS_SSP_IMX28_CLKID_SSP0;
598 #else /* CONFIG_MX23 */
599 priv->clkid = clkid - MXS_SSP_IMX23_CLKID_SSP0;
600 #endif
601 mmc = &plat->mmc;
602 mmc->cfg = &plat->cfg;
603 mmc->dev = dev;
604
605 priv->desc = mxs_dma_desc_alloc();
606 if (!priv->desc) {
607 printf("%s: Cannot allocate DMA descriptor\n", __func__);
608 return -ENOMEM;
609 }
610
611 ret = mxs_dma_init_channel(priv->dma_channel);
612 if (ret)
613 return ret;
614
615 plat->cfg.name = "MXS MMC";
616 plat->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
617
618 plat->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
619 MMC_MODE_HS_52MHz | MMC_MODE_HS;
620
621 /*
622 * SSPCLK = 480 * 18 / 29 / 1 = 297.731 MHz
623 * SSP bit rate = SSPCLK / (CLOCK_DIVIDE * (1 + CLOCK_RATE)),
624 * CLOCK_DIVIDE has to be an even value from 2 to 254, and
625 * CLOCK_RATE could be any integer from 0 to 255.
626 */
627 plat->cfg.f_min = 400000;
628 plat->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + priv->clkid) * 1000 / 2;
629 plat->cfg.b_max = 0x20;
630
631 bdesc = mmc_get_blk_desc(mmc);
632 if (!bdesc) {
633 printf("%s: No block device descriptor!\n", __func__);
634 return -ENODEV;
635 }
636
637 if (plat->non_removable)
638 bdesc->removable = 0;
639
640 ret = mxsmmc_init(dev);
641 if (ret)
642 printf("%s: MMC%d init error %d\n", __func__,
643 bdesc->devnum, ret);
644
645 /* Set the initial clock speed */
646 mmc_set_clock(mmc, 400000, MMC_CLK_ENABLE);
647
648 upriv->mmc = mmc;
649
650 return 0;
651 };
652
653 #if CONFIG_IS_ENABLED(BLK)
654 static int mxsmmc_bind(struct udevice *dev)
655 {
656 struct mxsmmc_plat *plat = dev_get_plat(dev);
657
658 return mmc_bind(dev, &plat->mmc, &plat->cfg);
659 }
660 #endif
661
662 static const struct dm_mmc_ops mxsmmc_ops = {
663 .get_cd = mxsmmc_get_cd,
664 .send_cmd = mxsmmc_send_cmd,
665 .set_ios = mxsmmc_set_ios,
666 };
667
668 #if CONFIG_IS_ENABLED(OF_REAL)
669 static int mxsmmc_of_to_plat(struct udevice *bus)
670 {
671 struct mxsmmc_plat *plat = dev_get_plat(bus);
672 u32 prop[2];
673 int ret;
674
675 plat->base = dev_read_addr(bus);
676 plat->buswidth =
677 dev_read_u32_default(bus, "bus-width", 1);
678 plat->non_removable = dev_read_bool(bus, "non-removable");
679
680 ret = dev_read_u32_array(bus, "dmas", prop, ARRAY_SIZE(prop));
681 if (ret) {
682 printf("%s: Reading 'dmas' property failed!\n", __func__);
683 return ret;
684 }
685 plat->dma_id = prop[1];
686
687 ret = dev_read_u32_array(bus, "clocks", prop, ARRAY_SIZE(prop));
688 if (ret) {
689 printf("%s: Reading 'clocks' property failed!\n", __func__);
690 return ret;
691 }
692 plat->clk_id = prop[1];
693
694 debug("%s: base=0x%x, bus_width=%d %s dma_id=%d clk_id=%d\n",
695 __func__, (uint)plat->base, plat->buswidth,
696 plat->non_removable ? "non-removable" : NULL,
697 plat->dma_id, plat->clk_id);
698
699 return 0;
700 }
701
702 static const struct udevice_id mxsmmc_ids[] = {
703 { .compatible = "fsl,imx23-mmc", },
704 { .compatible = "fsl,imx28-mmc", },
705 { /* sentinel */ }
706 };
707 #endif
708
709 U_BOOT_DRIVER(fsl_imx23_mmc) = {
710 .name = "fsl_imx23_mmc",
711 .id = UCLASS_MMC,
712 #if CONFIG_IS_ENABLED(OF_REAL)
713 .of_match = mxsmmc_ids,
714 .of_to_plat = mxsmmc_of_to_plat,
715 #endif
716 .ops = &mxsmmc_ops,
717 #if CONFIG_IS_ENABLED(BLK)
718 .bind = mxsmmc_bind,
719 #endif
720 .probe = mxsmmc_probe,
721 .priv_auto = sizeof(struct mxsmmc_priv),
722 .plat_auto = sizeof(struct mxsmmc_plat),
723 };
724
725 DM_DRIVER_ALIAS(fsl_imx23_mmc, fsl_imx28_mmc)
726 #endif /* CONFIG_DM_MMC */
727