1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 Socionext Inc.
4 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5 */
6
7 #include <common.h>
8 #include <clk.h>
9 #include <fdtdec.h>
10 #include <mmc.h>
11 #include <dm.h>
12 #include <dm/pinctrl.h>
13 #include <linux/compat.h>
14 #include <linux/dma-direction.h>
15 #include <linux/io.h>
16 #include <linux/sizes.h>
17 #include <power/regulator.h>
18 #include <asm/unaligned.h>
19
20 #include "tmio-common.h"
21
22 DECLARE_GLOBAL_DATA_PTR;
23
tmio_sd_readq(struct tmio_sd_priv * priv,unsigned int reg)24 static u64 tmio_sd_readq(struct tmio_sd_priv *priv, unsigned int reg)
25 {
26 return readq(priv->regbase + (reg << 1));
27 }
28
tmio_sd_writeq(struct tmio_sd_priv * priv,u64 val,unsigned int reg)29 static void tmio_sd_writeq(struct tmio_sd_priv *priv,
30 u64 val, unsigned int reg)
31 {
32 writeq(val, priv->regbase + (reg << 1));
33 }
34
tmio_sd_readw(struct tmio_sd_priv * priv,unsigned int reg)35 static u16 tmio_sd_readw(struct tmio_sd_priv *priv, unsigned int reg)
36 {
37 return readw(priv->regbase + (reg >> 1));
38 }
39
tmio_sd_writew(struct tmio_sd_priv * priv,u16 val,unsigned int reg)40 static void tmio_sd_writew(struct tmio_sd_priv *priv,
41 u16 val, unsigned int reg)
42 {
43 writew(val, priv->regbase + (reg >> 1));
44 }
45
tmio_sd_readl(struct tmio_sd_priv * priv,unsigned int reg)46 u32 tmio_sd_readl(struct tmio_sd_priv *priv, unsigned int reg)
47 {
48 u32 val;
49
50 if (priv->caps & TMIO_SD_CAP_64BIT)
51 return readl(priv->regbase + (reg << 1));
52 else if (priv->caps & TMIO_SD_CAP_16BIT) {
53 val = readw(priv->regbase + (reg >> 1)) & 0xffff;
54 if ((reg == TMIO_SD_RSP10) || (reg == TMIO_SD_RSP32) ||
55 (reg == TMIO_SD_RSP54) || (reg == TMIO_SD_RSP76)) {
56 val |= readw(priv->regbase + (reg >> 1) + 2) << 16;
57 }
58 return val;
59 } else
60 return readl(priv->regbase + reg);
61 }
62
tmio_sd_writel(struct tmio_sd_priv * priv,u32 val,unsigned int reg)63 void tmio_sd_writel(struct tmio_sd_priv *priv,
64 u32 val, unsigned int reg)
65 {
66 if (priv->caps & TMIO_SD_CAP_64BIT)
67 writel(val, priv->regbase + (reg << 1));
68 else if (priv->caps & TMIO_SD_CAP_16BIT) {
69 writew(val & 0xffff, priv->regbase + (reg >> 1));
70 if (reg == TMIO_SD_INFO1 || reg == TMIO_SD_INFO1_MASK ||
71 reg == TMIO_SD_INFO2 || reg == TMIO_SD_INFO2_MASK ||
72 reg == TMIO_SD_ARG)
73 writew(val >> 16, priv->regbase + (reg >> 1) + 2);
74 } else
75 writel(val, priv->regbase + reg);
76 }
77
__dma_map_single(void * ptr,size_t size,enum dma_data_direction dir)78 static dma_addr_t __dma_map_single(void *ptr, size_t size,
79 enum dma_data_direction dir)
80 {
81 unsigned long addr = (unsigned long)ptr;
82
83 if (dir == DMA_FROM_DEVICE)
84 invalidate_dcache_range(addr, addr + size);
85 else
86 flush_dcache_range(addr, addr + size);
87
88 return addr;
89 }
90
__dma_unmap_single(dma_addr_t addr,size_t size,enum dma_data_direction dir)91 static void __dma_unmap_single(dma_addr_t addr, size_t size,
92 enum dma_data_direction dir)
93 {
94 if (dir != DMA_TO_DEVICE)
95 invalidate_dcache_range(addr, addr + size);
96 }
97
tmio_sd_check_error(struct udevice * dev,struct mmc_cmd * cmd)98 static int tmio_sd_check_error(struct udevice *dev, struct mmc_cmd *cmd)
99 {
100 struct tmio_sd_priv *priv = dev_get_priv(dev);
101 u32 info2 = tmio_sd_readl(priv, TMIO_SD_INFO2);
102
103 if (info2 & TMIO_SD_INFO2_ERR_RTO) {
104 /*
105 * TIMEOUT must be returned for unsupported command. Do not
106 * display error log since this might be a part of sequence to
107 * distinguish between SD and MMC.
108 */
109 return -ETIMEDOUT;
110 }
111
112 if (info2 & TMIO_SD_INFO2_ERR_TO) {
113 dev_err(dev, "timeout error\n");
114 return -ETIMEDOUT;
115 }
116
117 if (info2 & (TMIO_SD_INFO2_ERR_END | TMIO_SD_INFO2_ERR_CRC |
118 TMIO_SD_INFO2_ERR_IDX)) {
119 if ((cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK) &&
120 (cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK_HS200))
121 dev_err(dev, "communication out of sync\n");
122 return -EILSEQ;
123 }
124
125 if (info2 & (TMIO_SD_INFO2_ERR_ILA | TMIO_SD_INFO2_ERR_ILR |
126 TMIO_SD_INFO2_ERR_ILW)) {
127 dev_err(dev, "illegal access\n");
128 return -EIO;
129 }
130
131 return 0;
132 }
133
tmio_sd_wait_for_irq(struct udevice * dev,struct mmc_cmd * cmd,unsigned int reg,u32 flag)134 static int tmio_sd_wait_for_irq(struct udevice *dev, struct mmc_cmd *cmd,
135 unsigned int reg, u32 flag)
136 {
137 struct tmio_sd_priv *priv = dev_get_priv(dev);
138 long wait = 1000000;
139 int ret;
140
141 while (!(tmio_sd_readl(priv, reg) & flag)) {
142 if (wait-- < 0) {
143 dev_err(dev, "timeout\n");
144 return -ETIMEDOUT;
145 }
146
147 ret = tmio_sd_check_error(dev, cmd);
148 if (ret)
149 return ret;
150
151 udelay(1);
152 }
153
154 return 0;
155 }
156
157 #define tmio_pio_read_fifo(__width, __suffix) \
158 static void tmio_pio_read_fifo_##__width(struct tmio_sd_priv *priv, \
159 char *pbuf, uint blksz) \
160 { \
161 u##__width *buf = (u##__width *)pbuf; \
162 int i; \
163 \
164 if (likely(IS_ALIGNED((uintptr_t)buf, ((__width) / 8)))) { \
165 for (i = 0; i < blksz / ((__width) / 8); i++) { \
166 *buf++ = tmio_sd_read##__suffix(priv, \
167 TMIO_SD_BUF); \
168 } \
169 } else { \
170 for (i = 0; i < blksz / ((__width) / 8); i++) { \
171 u##__width data; \
172 data = tmio_sd_read##__suffix(priv, \
173 TMIO_SD_BUF); \
174 put_unaligned(data, buf++); \
175 } \
176 } \
177 }
178
179 tmio_pio_read_fifo(64, q)
180 tmio_pio_read_fifo(32, l)
181 tmio_pio_read_fifo(16, w)
182
tmio_sd_pio_read_one_block(struct udevice * dev,struct mmc_cmd * cmd,char * pbuf,uint blocksize)183 static int tmio_sd_pio_read_one_block(struct udevice *dev, struct mmc_cmd *cmd,
184 char *pbuf, uint blocksize)
185 {
186 struct tmio_sd_priv *priv = dev_get_priv(dev);
187 int ret;
188
189 /* wait until the buffer is filled with data */
190 ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
191 TMIO_SD_INFO2_BRE);
192 if (ret)
193 return ret;
194
195 /*
196 * Clear the status flag _before_ read the buffer out because
197 * TMIO_SD_INFO2_BRE is edge-triggered, not level-triggered.
198 */
199 tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
200
201 if (priv->caps & TMIO_SD_CAP_64BIT)
202 tmio_pio_read_fifo_64(priv, pbuf, blocksize);
203 else if (priv->caps & TMIO_SD_CAP_16BIT)
204 tmio_pio_read_fifo_16(priv, pbuf, blocksize);
205 else
206 tmio_pio_read_fifo_32(priv, pbuf, blocksize);
207
208 return 0;
209 }
210
211 #define tmio_pio_write_fifo(__width, __suffix) \
212 static void tmio_pio_write_fifo_##__width(struct tmio_sd_priv *priv, \
213 const char *pbuf, uint blksz)\
214 { \
215 const u##__width *buf = (const u##__width *)pbuf; \
216 int i; \
217 \
218 if (likely(IS_ALIGNED((uintptr_t)buf, ((__width) / 8)))) { \
219 for (i = 0; i < blksz / ((__width) / 8); i++) { \
220 tmio_sd_write##__suffix(priv, *buf++, \
221 TMIO_SD_BUF); \
222 } \
223 } else { \
224 for (i = 0; i < blksz / ((__width) / 8); i++) { \
225 u##__width data = get_unaligned(buf++); \
226 tmio_sd_write##__suffix(priv, data, \
227 TMIO_SD_BUF); \
228 } \
229 } \
230 }
231
232 tmio_pio_write_fifo(64, q)
233 tmio_pio_write_fifo(32, l)
234 tmio_pio_write_fifo(16, w)
235
tmio_sd_pio_write_one_block(struct udevice * dev,struct mmc_cmd * cmd,const char * pbuf,uint blocksize)236 static int tmio_sd_pio_write_one_block(struct udevice *dev, struct mmc_cmd *cmd,
237 const char *pbuf, uint blocksize)
238 {
239 struct tmio_sd_priv *priv = dev_get_priv(dev);
240 int ret;
241
242 /* wait until the buffer becomes empty */
243 ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
244 TMIO_SD_INFO2_BWE);
245 if (ret)
246 return ret;
247
248 tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
249
250 if (priv->caps & TMIO_SD_CAP_64BIT)
251 tmio_pio_write_fifo_64(priv, pbuf, blocksize);
252 else if (priv->caps & TMIO_SD_CAP_16BIT)
253 tmio_pio_write_fifo_16(priv, pbuf, blocksize);
254 else
255 tmio_pio_write_fifo_32(priv, pbuf, blocksize);
256
257 return 0;
258 }
259
tmio_sd_pio_xfer(struct udevice * dev,struct mmc_cmd * cmd,struct mmc_data * data)260 static int tmio_sd_pio_xfer(struct udevice *dev, struct mmc_cmd *cmd,
261 struct mmc_data *data)
262 {
263 const char *src = data->src;
264 char *dest = data->dest;
265 int i, ret;
266
267 for (i = 0; i < data->blocks; i++) {
268 if (data->flags & MMC_DATA_READ)
269 ret = tmio_sd_pio_read_one_block(dev, cmd, dest,
270 data->blocksize);
271 else
272 ret = tmio_sd_pio_write_one_block(dev, cmd, src,
273 data->blocksize);
274 if (ret)
275 return ret;
276
277 if (data->flags & MMC_DATA_READ)
278 dest += data->blocksize;
279 else
280 src += data->blocksize;
281 }
282
283 return 0;
284 }
285
tmio_sd_dma_start(struct tmio_sd_priv * priv,dma_addr_t dma_addr)286 static void tmio_sd_dma_start(struct tmio_sd_priv *priv,
287 dma_addr_t dma_addr)
288 {
289 u32 tmp;
290
291 tmio_sd_writel(priv, 0, TMIO_SD_DMA_INFO1);
292 tmio_sd_writel(priv, 0, TMIO_SD_DMA_INFO2);
293
294 /* enable DMA */
295 tmp = tmio_sd_readl(priv, TMIO_SD_EXTMODE);
296 tmp |= TMIO_SD_EXTMODE_DMA_EN;
297 tmio_sd_writel(priv, tmp, TMIO_SD_EXTMODE);
298
299 tmio_sd_writel(priv, dma_addr & U32_MAX, TMIO_SD_DMA_ADDR_L);
300
301 /* suppress the warning "right shift count >= width of type" */
302 dma_addr >>= min_t(int, 32, 8 * sizeof(dma_addr));
303
304 tmio_sd_writel(priv, dma_addr & U32_MAX, TMIO_SD_DMA_ADDR_H);
305
306 tmio_sd_writel(priv, TMIO_SD_DMA_CTL_START, TMIO_SD_DMA_CTL);
307 }
308
tmio_sd_dma_wait_for_irq(struct udevice * dev,u32 flag,unsigned int blocks)309 static int tmio_sd_dma_wait_for_irq(struct udevice *dev, u32 flag,
310 unsigned int blocks)
311 {
312 struct tmio_sd_priv *priv = dev_get_priv(dev);
313 long wait = 1000000 + 10 * blocks;
314
315 while (!(tmio_sd_readl(priv, TMIO_SD_DMA_INFO1) & flag)) {
316 if (wait-- < 0) {
317 dev_err(dev, "timeout during DMA\n");
318 return -ETIMEDOUT;
319 }
320
321 udelay(10);
322 }
323
324 if (tmio_sd_readl(priv, TMIO_SD_DMA_INFO2)) {
325 dev_err(dev, "error during DMA\n");
326 return -EIO;
327 }
328
329 return 0;
330 }
331
tmio_sd_dma_xfer(struct udevice * dev,struct mmc_data * data)332 static int tmio_sd_dma_xfer(struct udevice *dev, struct mmc_data *data)
333 {
334 struct tmio_sd_priv *priv = dev_get_priv(dev);
335 size_t len = data->blocks * data->blocksize;
336 void *buf;
337 enum dma_data_direction dir;
338 dma_addr_t dma_addr;
339 u32 poll_flag, tmp;
340 int ret;
341
342 tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
343
344 if (data->flags & MMC_DATA_READ) {
345 buf = data->dest;
346 dir = DMA_FROM_DEVICE;
347 /*
348 * The DMA READ completion flag position differs on Socionext
349 * and Renesas SoCs. It is bit 20 on Socionext SoCs and using
350 * bit 17 is a hardware bug and forbidden. It is either bit 17
351 * or bit 20 on Renesas SoCs, depending on SoC.
352 */
353 poll_flag = priv->read_poll_flag;
354 tmp |= TMIO_SD_DMA_MODE_DIR_RD;
355 } else {
356 buf = (void *)data->src;
357 dir = DMA_TO_DEVICE;
358 poll_flag = TMIO_SD_DMA_INFO1_END_WR;
359 tmp &= ~TMIO_SD_DMA_MODE_DIR_RD;
360 }
361
362 tmio_sd_writel(priv, tmp, TMIO_SD_DMA_MODE);
363
364 dma_addr = __dma_map_single(buf, len, dir);
365
366 tmio_sd_dma_start(priv, dma_addr);
367
368 ret = tmio_sd_dma_wait_for_irq(dev, poll_flag, data->blocks);
369
370 if (poll_flag == TMIO_SD_DMA_INFO1_END_RD)
371 udelay(1);
372
373 __dma_unmap_single(dma_addr, len, dir);
374
375 return ret;
376 }
377
378 /* check if the address is DMA'able */
tmio_sd_addr_is_dmaable(const char * src)379 static bool tmio_sd_addr_is_dmaable(const char *src)
380 {
381 uintptr_t addr = (uintptr_t)src;
382
383 if (!IS_ALIGNED(addr, TMIO_SD_DMA_MINALIGN))
384 return false;
385
386 #if defined(CONFIG_RCAR_GEN3)
387 /* Gen3 DMA has 32bit limit */
388 if (addr >> 32)
389 return false;
390 #endif
391
392 #if defined(CONFIG_ARCH_UNIPHIER) && !defined(CONFIG_ARM64) && \
393 defined(CONFIG_SPL_BUILD)
394 /*
395 * For UniPhier ARMv7 SoCs, the stack is allocated in the locked ways
396 * of L2, which is unreachable from the DMA engine.
397 */
398 if (addr < CONFIG_SPL_STACK)
399 return false;
400 #endif
401
402 return true;
403 }
404
tmio_sd_send_cmd(struct udevice * dev,struct mmc_cmd * cmd,struct mmc_data * data)405 int tmio_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
406 struct mmc_data *data)
407 {
408 struct tmio_sd_priv *priv = dev_get_priv(dev);
409 int ret;
410 u32 tmp;
411
412 if (tmio_sd_readl(priv, TMIO_SD_INFO2) & TMIO_SD_INFO2_CBSY) {
413 dev_err(dev, "command busy\n");
414 return -EBUSY;
415 }
416
417 /* clear all status flags */
418 tmio_sd_writel(priv, 0, TMIO_SD_INFO1);
419 tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
420
421 /* disable DMA once */
422 tmp = tmio_sd_readl(priv, TMIO_SD_EXTMODE);
423 tmp &= ~TMIO_SD_EXTMODE_DMA_EN;
424 tmio_sd_writel(priv, tmp, TMIO_SD_EXTMODE);
425
426 tmio_sd_writel(priv, cmd->cmdarg, TMIO_SD_ARG);
427
428 tmp = cmd->cmdidx;
429
430 if (data) {
431 tmio_sd_writel(priv, data->blocksize, TMIO_SD_SIZE);
432 tmio_sd_writel(priv, data->blocks, TMIO_SD_SECCNT);
433
434 /* Do not send CMD12 automatically */
435 tmp |= TMIO_SD_CMD_NOSTOP | TMIO_SD_CMD_DATA;
436
437 if (data->blocks > 1)
438 tmp |= TMIO_SD_CMD_MULTI;
439
440 if (data->flags & MMC_DATA_READ)
441 tmp |= TMIO_SD_CMD_RD;
442 }
443
444 /*
445 * Do not use the response type auto-detection on this hardware.
446 * CMD8, for example, has different response types on SD and eMMC,
447 * while this controller always assumes the response type for SD.
448 * Set the response type manually.
449 */
450 switch (cmd->resp_type) {
451 case MMC_RSP_NONE:
452 tmp |= TMIO_SD_CMD_RSP_NONE;
453 break;
454 case MMC_RSP_R1:
455 tmp |= TMIO_SD_CMD_RSP_R1;
456 break;
457 case MMC_RSP_R1b:
458 tmp |= TMIO_SD_CMD_RSP_R1B;
459 break;
460 case MMC_RSP_R2:
461 tmp |= TMIO_SD_CMD_RSP_R2;
462 break;
463 case MMC_RSP_R3:
464 tmp |= TMIO_SD_CMD_RSP_R3;
465 break;
466 default:
467 dev_err(dev, "unknown response type\n");
468 return -EINVAL;
469 }
470
471 dev_dbg(dev, "sending CMD%d (SD_CMD=%08x, SD_ARG=%08x)\n",
472 cmd->cmdidx, tmp, cmd->cmdarg);
473 tmio_sd_writel(priv, tmp, TMIO_SD_CMD);
474
475 ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO1,
476 TMIO_SD_INFO1_RSP);
477 if (ret)
478 return ret;
479
480 if (cmd->resp_type & MMC_RSP_136) {
481 u32 rsp_127_104 = tmio_sd_readl(priv, TMIO_SD_RSP76);
482 u32 rsp_103_72 = tmio_sd_readl(priv, TMIO_SD_RSP54);
483 u32 rsp_71_40 = tmio_sd_readl(priv, TMIO_SD_RSP32);
484 u32 rsp_39_8 = tmio_sd_readl(priv, TMIO_SD_RSP10);
485
486 cmd->response[0] = ((rsp_127_104 & 0x00ffffff) << 8) |
487 ((rsp_103_72 & 0xff000000) >> 24);
488 cmd->response[1] = ((rsp_103_72 & 0x00ffffff) << 8) |
489 ((rsp_71_40 & 0xff000000) >> 24);
490 cmd->response[2] = ((rsp_71_40 & 0x00ffffff) << 8) |
491 ((rsp_39_8 & 0xff000000) >> 24);
492 cmd->response[3] = (rsp_39_8 & 0xffffff) << 8;
493 } else {
494 /* bit 39-8 */
495 cmd->response[0] = tmio_sd_readl(priv, TMIO_SD_RSP10);
496 }
497
498 if (data) {
499 /* use DMA if the HW supports it and the buffer is aligned */
500 if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL &&
501 tmio_sd_addr_is_dmaable(data->src))
502 ret = tmio_sd_dma_xfer(dev, data);
503 else
504 ret = tmio_sd_pio_xfer(dev, cmd, data);
505 if (ret)
506 return ret;
507
508 ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO1,
509 TMIO_SD_INFO1_CMP);
510 if (ret)
511 return ret;
512 }
513
514 return tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
515 TMIO_SD_INFO2_SCLKDIVEN);
516 }
517
tmio_sd_set_bus_width(struct tmio_sd_priv * priv,struct mmc * mmc)518 static int tmio_sd_set_bus_width(struct tmio_sd_priv *priv,
519 struct mmc *mmc)
520 {
521 u32 val, tmp;
522
523 switch (mmc->bus_width) {
524 case 0:
525 case 1:
526 val = TMIO_SD_OPTION_WIDTH_1;
527 break;
528 case 4:
529 val = TMIO_SD_OPTION_WIDTH_4;
530 break;
531 case 8:
532 val = TMIO_SD_OPTION_WIDTH_8;
533 break;
534 default:
535 return -EINVAL;
536 }
537
538 tmp = tmio_sd_readl(priv, TMIO_SD_OPTION);
539 tmp &= ~TMIO_SD_OPTION_WIDTH_MASK;
540 tmp |= val;
541 tmio_sd_writel(priv, tmp, TMIO_SD_OPTION);
542
543 return 0;
544 }
545
tmio_sd_set_ddr_mode(struct tmio_sd_priv * priv,struct mmc * mmc)546 static void tmio_sd_set_ddr_mode(struct tmio_sd_priv *priv,
547 struct mmc *mmc)
548 {
549 u32 tmp;
550
551 tmp = tmio_sd_readl(priv, TMIO_SD_IF_MODE);
552 if (mmc->ddr_mode)
553 tmp |= TMIO_SD_IF_MODE_DDR;
554 else
555 tmp &= ~TMIO_SD_IF_MODE_DDR;
556 tmio_sd_writel(priv, tmp, TMIO_SD_IF_MODE);
557 }
558
tmio_sd_clk_get_rate(struct tmio_sd_priv * priv)559 static ulong tmio_sd_clk_get_rate(struct tmio_sd_priv *priv)
560 {
561 return priv->clk_get_rate(priv);
562 }
563
tmio_sd_set_clk_rate(struct tmio_sd_priv * priv,struct mmc * mmc)564 static void tmio_sd_set_clk_rate(struct tmio_sd_priv *priv, struct mmc *mmc)
565 {
566 unsigned int divisor;
567 u32 tmp, val = 0;
568 ulong mclk;
569
570 if (mmc->clock) {
571 mclk = tmio_sd_clk_get_rate(priv);
572
573 divisor = DIV_ROUND_UP(mclk, mmc->clock);
574
575 /* Do not set divider to 0xff in DDR mode */
576 if (mmc->ddr_mode && (divisor == 1))
577 divisor = 2;
578
579 if (divisor <= 1)
580 val = (priv->caps & TMIO_SD_CAP_RCAR) ?
581 TMIO_SD_CLKCTL_RCAR_DIV1 : TMIO_SD_CLKCTL_DIV1;
582 else if (divisor <= 2)
583 val = TMIO_SD_CLKCTL_DIV2;
584 else if (divisor <= 4)
585 val = TMIO_SD_CLKCTL_DIV4;
586 else if (divisor <= 8)
587 val = TMIO_SD_CLKCTL_DIV8;
588 else if (divisor <= 16)
589 val = TMIO_SD_CLKCTL_DIV16;
590 else if (divisor <= 32)
591 val = TMIO_SD_CLKCTL_DIV32;
592 else if (divisor <= 64)
593 val = TMIO_SD_CLKCTL_DIV64;
594 else if (divisor <= 128)
595 val = TMIO_SD_CLKCTL_DIV128;
596 else if (divisor <= 256)
597 val = TMIO_SD_CLKCTL_DIV256;
598 else if (divisor <= 512 || !(priv->caps & TMIO_SD_CAP_DIV1024))
599 val = TMIO_SD_CLKCTL_DIV512;
600 else
601 val = TMIO_SD_CLKCTL_DIV1024;
602 }
603
604 tmp = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
605 if (mmc->clock &&
606 !((tmp & TMIO_SD_CLKCTL_SCLKEN) &&
607 ((tmp & TMIO_SD_CLKCTL_DIV_MASK) == val))) {
608 /*
609 * Stop the clock before changing its rate
610 * to avoid a glitch signal
611 */
612 tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
613 tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
614
615 /* Change the clock rate. */
616 tmp &= ~TMIO_SD_CLKCTL_DIV_MASK;
617 tmp |= val;
618 }
619
620 /* Enable or Disable the clock */
621 if (mmc->clk_disable) {
622 tmp |= TMIO_SD_CLKCTL_OFFEN;
623 tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
624 } else {
625 tmp &= ~TMIO_SD_CLKCTL_OFFEN;
626 tmp |= TMIO_SD_CLKCTL_SCLKEN;
627 }
628
629 tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
630
631 udelay(1000);
632 }
633
tmio_sd_set_pins(struct udevice * dev)634 static void tmio_sd_set_pins(struct udevice *dev)
635 {
636 __maybe_unused struct mmc *mmc = mmc_get_mmc_dev(dev);
637
638 #ifdef CONFIG_DM_REGULATOR
639 struct tmio_sd_priv *priv = dev_get_priv(dev);
640
641 if (priv->vqmmc_dev) {
642 if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
643 regulator_set_value(priv->vqmmc_dev, 1800000);
644 else
645 regulator_set_value(priv->vqmmc_dev, 3300000);
646 regulator_set_enable(priv->vqmmc_dev, true);
647 }
648 #endif
649
650 #ifdef CONFIG_PINCTRL
651 if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
652 pinctrl_select_state(dev, "state_uhs");
653 else
654 pinctrl_select_state(dev, "default");
655 #endif
656 }
657
tmio_sd_set_ios(struct udevice * dev)658 int tmio_sd_set_ios(struct udevice *dev)
659 {
660 struct tmio_sd_priv *priv = dev_get_priv(dev);
661 struct mmc *mmc = mmc_get_mmc_dev(dev);
662 int ret;
663
664 dev_dbg(dev, "clock %uHz, DDRmode %d, width %u\n",
665 mmc->clock, mmc->ddr_mode, mmc->bus_width);
666
667 tmio_sd_set_clk_rate(priv, mmc);
668 ret = tmio_sd_set_bus_width(priv, mmc);
669 if (ret)
670 return ret;
671 tmio_sd_set_ddr_mode(priv, mmc);
672 tmio_sd_set_pins(dev);
673
674 return 0;
675 }
676
tmio_sd_get_cd(struct udevice * dev)677 int tmio_sd_get_cd(struct udevice *dev)
678 {
679 struct tmio_sd_priv *priv = dev_get_priv(dev);
680
681 if (priv->caps & TMIO_SD_CAP_NONREMOVABLE)
682 return 1;
683
684 return !!(tmio_sd_readl(priv, TMIO_SD_INFO1) &
685 TMIO_SD_INFO1_CD);
686 }
687
tmio_sd_host_init(struct tmio_sd_priv * priv)688 static void tmio_sd_host_init(struct tmio_sd_priv *priv)
689 {
690 u32 tmp;
691
692 /* soft reset of the host */
693 tmp = tmio_sd_readl(priv, TMIO_SD_SOFT_RST);
694 tmp &= ~TMIO_SD_SOFT_RST_RSTX;
695 tmio_sd_writel(priv, tmp, TMIO_SD_SOFT_RST);
696 tmp |= TMIO_SD_SOFT_RST_RSTX;
697 tmio_sd_writel(priv, tmp, TMIO_SD_SOFT_RST);
698
699 /* FIXME: implement eMMC hw_reset */
700
701 tmio_sd_writel(priv, TMIO_SD_STOP_SEC, TMIO_SD_STOP);
702
703 /*
704 * Connected to 32bit AXI.
705 * This register dropped backward compatibility at version 0x10.
706 * Write an appropriate value depending on the IP version.
707 */
708 if (priv->version >= 0x10) {
709 if (priv->caps & TMIO_SD_CAP_64BIT)
710 tmio_sd_writel(priv, 0x000, TMIO_SD_HOST_MODE);
711 else
712 tmio_sd_writel(priv, 0x101, TMIO_SD_HOST_MODE);
713 } else {
714 tmio_sd_writel(priv, 0x0, TMIO_SD_HOST_MODE);
715 }
716
717 if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL) {
718 tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
719 tmp |= TMIO_SD_DMA_MODE_ADDR_INC;
720 tmio_sd_writel(priv, tmp, TMIO_SD_DMA_MODE);
721 }
722 }
723
tmio_sd_bind(struct udevice * dev)724 int tmio_sd_bind(struct udevice *dev)
725 {
726 struct tmio_sd_plat *plat = dev_get_platdata(dev);
727
728 return mmc_bind(dev, &plat->mmc, &plat->cfg);
729 }
730
tmio_sd_probe(struct udevice * dev,u32 quirks)731 int tmio_sd_probe(struct udevice *dev, u32 quirks)
732 {
733 struct tmio_sd_plat *plat = dev_get_platdata(dev);
734 struct tmio_sd_priv *priv = dev_get_priv(dev);
735 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
736 fdt_addr_t base;
737 ulong mclk;
738 int ret;
739
740 base = devfdt_get_addr(dev);
741 if (base == FDT_ADDR_T_NONE)
742 return -EINVAL;
743
744 priv->regbase = devm_ioremap(dev, base, SZ_2K);
745 if (!priv->regbase)
746 return -ENOMEM;
747
748 #ifdef CONFIG_DM_REGULATOR
749 device_get_supply_regulator(dev, "vqmmc-supply", &priv->vqmmc_dev);
750 if (priv->vqmmc_dev)
751 regulator_set_value(priv->vqmmc_dev, 3300000);
752 #endif
753
754 ret = mmc_of_parse(dev, &plat->cfg);
755 if (ret < 0) {
756 dev_err(dev, "failed to parse host caps\n");
757 return ret;
758 }
759
760 plat->cfg.name = dev->name;
761 plat->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
762
763 if (quirks)
764 priv->caps = quirks;
765
766 priv->version = tmio_sd_readl(priv, TMIO_SD_VERSION) &
767 TMIO_SD_VERSION_IP;
768 dev_dbg(dev, "version %x\n", priv->version);
769 if (priv->version >= 0x10) {
770 priv->caps |= TMIO_SD_CAP_DMA_INTERNAL;
771 priv->caps |= TMIO_SD_CAP_DIV1024;
772 }
773
774 if (fdt_get_property(gd->fdt_blob, dev_of_offset(dev), "non-removable",
775 NULL))
776 priv->caps |= TMIO_SD_CAP_NONREMOVABLE;
777
778 tmio_sd_host_init(priv);
779
780 mclk = tmio_sd_clk_get_rate(priv);
781
782 plat->cfg.voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
783 plat->cfg.f_min = mclk /
784 (priv->caps & TMIO_SD_CAP_DIV1024 ? 1024 : 512);
785 plat->cfg.f_max = mclk;
786 if (quirks & TMIO_SD_CAP_16BIT)
787 plat->cfg.b_max = U16_MAX; /* max value of TMIO_SD_SECCNT */
788 else
789 plat->cfg.b_max = U32_MAX; /* max value of TMIO_SD_SECCNT */
790
791 upriv->mmc = &plat->mmc;
792
793 return 0;
794 }
795