2 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
4 * SPDX-License-Identifier: GPL-2.0+
12 #include <dm/device.h>
13 #include <linux/compat.h>
15 #include <linux/sizes.h>
16 #include <asm/unaligned.h>
17 #include <asm/dma-mapping.h>
19 DECLARE_GLOBAL_DATA_PTR
;
21 #define UNIPHIER_SD_CMD 0x000 /* command */
22 #define UNIPHIER_SD_CMD_NOSTOP BIT(14) /* No automatic CMD12 issue */
23 #define UNIPHIER_SD_CMD_MULTI BIT(13) /* multiple block transfer */
24 #define UNIPHIER_SD_CMD_RD BIT(12) /* 1: read, 0: write */
25 #define UNIPHIER_SD_CMD_DATA BIT(11) /* data transfer */
26 #define UNIPHIER_SD_CMD_APP BIT(6) /* ACMD preceded by CMD55 */
27 #define UNIPHIER_SD_CMD_NORMAL (0 << 8)/* auto-detect of resp-type */
28 #define UNIPHIER_SD_CMD_RSP_NONE (3 << 8)/* response: none */
29 #define UNIPHIER_SD_CMD_RSP_R1 (4 << 8)/* response: R1, R5, R6, R7 */
30 #define UNIPHIER_SD_CMD_RSP_R1B (5 << 8)/* response: R1b, R5b */
31 #define UNIPHIER_SD_CMD_RSP_R2 (6 << 8)/* response: R2 */
32 #define UNIPHIER_SD_CMD_RSP_R3 (7 << 8)/* response: R3, R4 */
33 #define UNIPHIER_SD_ARG 0x008 /* command argument */
34 #define UNIPHIER_SD_STOP 0x010 /* stop action control */
35 #define UNIPHIER_SD_STOP_SEC BIT(8) /* use sector count */
36 #define UNIPHIER_SD_STOP_STP BIT(0) /* issue CMD12 */
37 #define UNIPHIER_SD_SECCNT 0x014 /* sector counter */
38 #define UNIPHIER_SD_RSP10 0x018 /* response[39:8] */
39 #define UNIPHIER_SD_RSP32 0x020 /* response[71:40] */
40 #define UNIPHIER_SD_RSP54 0x028 /* response[103:72] */
41 #define UNIPHIER_SD_RSP76 0x030 /* response[127:104] */
42 #define UNIPHIER_SD_INFO1 0x038 /* IRQ status 1 */
43 #define UNIPHIER_SD_INFO1_CD BIT(5) /* state of card detect */
44 #define UNIPHIER_SD_INFO1_INSERT BIT(4) /* card inserted */
45 #define UNIPHIER_SD_INFO1_REMOVE BIT(3) /* card removed */
46 #define UNIPHIER_SD_INFO1_CMP BIT(2) /* data complete */
47 #define UNIPHIER_SD_INFO1_RSP BIT(0) /* response complete */
48 #define UNIPHIER_SD_INFO2 0x03c /* IRQ status 2 */
49 #define UNIPHIER_SD_INFO2_ERR_ILA BIT(15) /* illegal access err */
50 #define UNIPHIER_SD_INFO2_CBSY BIT(14) /* command busy */
51 #define UNIPHIER_SD_INFO2_BWE BIT(9) /* write buffer ready */
52 #define UNIPHIER_SD_INFO2_BRE BIT(8) /* read buffer ready */
53 #define UNIPHIER_SD_INFO2_DAT0 BIT(7) /* SDDAT0 */
54 #define UNIPHIER_SD_INFO2_ERR_RTO BIT(6) /* response time out */
55 #define UNIPHIER_SD_INFO2_ERR_ILR BIT(5) /* illegal read err */
56 #define UNIPHIER_SD_INFO2_ERR_ILW BIT(4) /* illegal write err */
57 #define UNIPHIER_SD_INFO2_ERR_TO BIT(3) /* time out error */
58 #define UNIPHIER_SD_INFO2_ERR_END BIT(2) /* END bit error */
59 #define UNIPHIER_SD_INFO2_ERR_CRC BIT(1) /* CRC error */
60 #define UNIPHIER_SD_INFO2_ERR_IDX BIT(0) /* cmd index error */
61 #define UNIPHIER_SD_INFO1_MASK 0x040
62 #define UNIPHIER_SD_INFO2_MASK 0x044
63 #define UNIPHIER_SD_CLKCTL 0x048 /* clock divisor */
64 #define UNIPHIER_SD_CLKCTL_DIV_MASK 0x104ff
65 #define UNIPHIER_SD_CLKCTL_DIV1024 BIT(16) /* SDCLK = CLK / 1024 */
66 #define UNIPHIER_SD_CLKCTL_DIV512 BIT(7) /* SDCLK = CLK / 512 */
67 #define UNIPHIER_SD_CLKCTL_DIV256 BIT(6) /* SDCLK = CLK / 256 */
68 #define UNIPHIER_SD_CLKCTL_DIV128 BIT(5) /* SDCLK = CLK / 128 */
69 #define UNIPHIER_SD_CLKCTL_DIV64 BIT(4) /* SDCLK = CLK / 64 */
70 #define UNIPHIER_SD_CLKCTL_DIV32 BIT(3) /* SDCLK = CLK / 32 */
71 #define UNIPHIER_SD_CLKCTL_DIV16 BIT(2) /* SDCLK = CLK / 16 */
72 #define UNIPHIER_SD_CLKCTL_DIV8 BIT(1) /* SDCLK = CLK / 8 */
73 #define UNIPHIER_SD_CLKCTL_DIV4 BIT(0) /* SDCLK = CLK / 4 */
74 #define UNIPHIER_SD_CLKCTL_DIV2 0 /* SDCLK = CLK / 2 */
75 #define UNIPHIER_SD_CLKCTL_DIV1 BIT(10) /* SDCLK = CLK */
76 #define UNIPHIER_SD_CLKCTL_OFFEN BIT(9) /* stop SDCLK when unused */
77 #define UNIPHIER_SD_CLKCTL_SCLKEN BIT(8) /* SDCLK output enable */
78 #define UNIPHIER_SD_SIZE 0x04c /* block size */
79 #define UNIPHIER_SD_OPTION 0x050
80 #define UNIPHIER_SD_OPTION_WIDTH_MASK (5 << 13)
81 #define UNIPHIER_SD_OPTION_WIDTH_1 (4 << 13)
82 #define UNIPHIER_SD_OPTION_WIDTH_4 (0 << 13)
83 #define UNIPHIER_SD_OPTION_WIDTH_8 (1 << 13)
84 #define UNIPHIER_SD_BUF 0x060 /* read/write buffer */
85 #define UNIPHIER_SD_EXTMODE 0x1b0
86 #define UNIPHIER_SD_EXTMODE_DMA_EN BIT(1) /* transfer 1: DMA, 0: pio */
87 #define UNIPHIER_SD_SOFT_RST 0x1c0
88 #define UNIPHIER_SD_SOFT_RST_RSTX BIT(0) /* reset deassert */
89 #define UNIPHIER_SD_VERSION 0x1c4 /* version register */
90 #define UNIPHIER_SD_VERSION_IP 0xff /* IP version */
91 #define UNIPHIER_SD_HOST_MODE 0x1c8
92 #define UNIPHIER_SD_IF_MODE 0x1cc
93 #define UNIPHIER_SD_IF_MODE_DDR BIT(0) /* DDR mode */
94 #define UNIPHIER_SD_VOLT 0x1e4 /* voltage switch */
95 #define UNIPHIER_SD_VOLT_MASK (3 << 0)
96 #define UNIPHIER_SD_VOLT_OFF (0 << 0)
97 #define UNIPHIER_SD_VOLT_330 (1 << 0)/* 3.3V signal */
98 #define UNIPHIER_SD_VOLT_180 (2 << 0)/* 1.8V signal */
99 #define UNIPHIER_SD_DMA_MODE 0x410
100 #define UNIPHIER_SD_DMA_MODE_DIR_RD BIT(16) /* 1: from device, 0: to dev */
101 #define UNIPHIER_SD_DMA_MODE_ADDR_INC BIT(0) /* 1: address inc, 0: fixed */
102 #define UNIPHIER_SD_DMA_CTL 0x414
103 #define UNIPHIER_SD_DMA_CTL_START BIT(0) /* start DMA (auto cleared) */
104 #define UNIPHIER_SD_DMA_RST 0x418
105 #define UNIPHIER_SD_DMA_RST_RD BIT(9)
106 #define UNIPHIER_SD_DMA_RST_WR BIT(8)
107 #define UNIPHIER_SD_DMA_INFO1 0x420
108 #define UNIPHIER_SD_DMA_INFO1_END_RD2 BIT(20) /* DMA from device is complete*/
109 #define UNIPHIER_SD_DMA_INFO1_END_RD BIT(17) /* Don't use! Hardware bug */
110 #define UNIPHIER_SD_DMA_INFO1_END_WR BIT(16) /* DMA to device is complete */
111 #define UNIPHIER_SD_DMA_INFO1_MASK 0x424
112 #define UNIPHIER_SD_DMA_INFO2 0x428
113 #define UNIPHIER_SD_DMA_INFO2_ERR_RD BIT(17)
114 #define UNIPHIER_SD_DMA_INFO2_ERR_WR BIT(16)
115 #define UNIPHIER_SD_DMA_INFO2_MASK 0x42c
116 #define UNIPHIER_SD_DMA_ADDR_L 0x440
117 #define UNIPHIER_SD_DMA_ADDR_H 0x444
119 /* alignment required by the DMA engine of this controller */
120 #define UNIPHIER_SD_DMA_MINALIGN 0x10
122 struct uniphier_sd_priv
{
123 struct mmc_config cfg
;
126 void __iomem
*regbase
;
128 unsigned int version
;
130 #define UNIPHIER_SD_CAP_NONREMOVABLE BIT(0) /* Nonremovable e.g. eMMC */
131 #define UNIPHIER_SD_CAP_DMA_INTERNAL BIT(1) /* have internal DMA engine */
132 #define UNIPHIER_SD_CAP_DIV1024 BIT(2) /* divisor 1024 is available */
135 static dma_addr_t
__dma_map_single(void *ptr
, size_t size
,
136 enum dma_data_direction dir
)
138 unsigned long addr
= (unsigned long)ptr
;
140 if (dir
== DMA_FROM_DEVICE
)
141 invalidate_dcache_range(addr
, addr
+ size
);
143 flush_dcache_range(addr
, addr
+ size
);
148 static void __dma_unmap_single(dma_addr_t addr
, size_t size
,
149 enum dma_data_direction dir
)
151 if (dir
!= DMA_TO_DEVICE
)
152 invalidate_dcache_range(addr
, addr
+ size
);
155 static int uniphier_sd_check_error(struct uniphier_sd_priv
*priv
)
157 u32 info2
= readl(priv
->regbase
+ UNIPHIER_SD_INFO2
);
159 if (info2
& UNIPHIER_SD_INFO2_ERR_RTO
) {
161 * TIMEOUT must be returned for unsupported command. Do not
162 * display error log since this might be a part of sequence to
163 * distinguish between SD and MMC.
168 if (info2
& UNIPHIER_SD_INFO2_ERR_TO
) {
169 dev_err(priv
->dev
, "timeout error\n");
173 if (info2
& (UNIPHIER_SD_INFO2_ERR_END
| UNIPHIER_SD_INFO2_ERR_CRC
|
174 UNIPHIER_SD_INFO2_ERR_IDX
)) {
175 dev_err(priv
->dev
, "communication out of sync\n");
179 if (info2
& (UNIPHIER_SD_INFO2_ERR_ILA
| UNIPHIER_SD_INFO2_ERR_ILR
|
180 UNIPHIER_SD_INFO2_ERR_ILW
)) {
181 dev_err(priv
->dev
, "illegal access\n");
188 static int uniphier_sd_wait_for_irq(struct uniphier_sd_priv
*priv
,
189 unsigned int reg
, u32 flag
)
194 while (!(readl(priv
->regbase
+ reg
) & flag
)) {
196 dev_err(priv
->dev
, "timeout\n");
200 ret
= uniphier_sd_check_error(priv
);
210 static int uniphier_sd_pio_read_one_block(struct mmc
*mmc
, u32
**pbuf
,
213 struct uniphier_sd_priv
*priv
= mmc
->priv
;
216 /* wait until the buffer is filled with data */
217 ret
= uniphier_sd_wait_for_irq(priv
, UNIPHIER_SD_INFO2
,
218 UNIPHIER_SD_INFO2_BRE
);
223 * Clear the status flag _before_ read the buffer out because
224 * UNIPHIER_SD_INFO2_BRE is edge-triggered, not level-triggered.
226 writel(0, priv
->regbase
+ UNIPHIER_SD_INFO2
);
228 if (likely(IS_ALIGNED((unsigned long)*pbuf
, 4))) {
229 for (i
= 0; i
< blocksize
/ 4; i
++)
230 *(*pbuf
)++ = readl(priv
->regbase
+ UNIPHIER_SD_BUF
);
232 for (i
= 0; i
< blocksize
/ 4; i
++)
233 put_unaligned(readl(priv
->regbase
+ UNIPHIER_SD_BUF
),
240 static int uniphier_sd_pio_write_one_block(struct mmc
*mmc
, const u32
**pbuf
,
243 struct uniphier_sd_priv
*priv
= mmc
->priv
;
246 /* wait until the buffer becomes empty */
247 ret
= uniphier_sd_wait_for_irq(priv
, UNIPHIER_SD_INFO2
,
248 UNIPHIER_SD_INFO2_BWE
);
252 writel(0, priv
->regbase
+ UNIPHIER_SD_INFO2
);
254 if (likely(IS_ALIGNED((unsigned long)*pbuf
, 4))) {
255 for (i
= 0; i
< blocksize
/ 4; i
++)
256 writel(*(*pbuf
)++, priv
->regbase
+ UNIPHIER_SD_BUF
);
258 for (i
= 0; i
< blocksize
/ 4; i
++)
259 writel(get_unaligned((*pbuf
)++),
260 priv
->regbase
+ UNIPHIER_SD_BUF
);
266 static int uniphier_sd_pio_xfer(struct mmc
*mmc
, struct mmc_data
*data
)
268 u32
*dest
= (u32
*)data
->dest
;
269 const u32
*src
= (const u32
*)data
->src
;
272 for (i
= 0; i
< data
->blocks
; i
++) {
273 if (data
->flags
& MMC_DATA_READ
)
274 ret
= uniphier_sd_pio_read_one_block(mmc
, &dest
,
277 ret
= uniphier_sd_pio_write_one_block(mmc
, &src
,
286 static void uniphier_sd_dma_start(struct uniphier_sd_priv
*priv
,
291 writel(0, priv
->regbase
+ UNIPHIER_SD_DMA_INFO1
);
292 writel(0, priv
->regbase
+ UNIPHIER_SD_DMA_INFO2
);
295 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_EXTMODE
);
296 tmp
|= UNIPHIER_SD_EXTMODE_DMA_EN
;
297 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_EXTMODE
);
299 writel(dma_addr
& U32_MAX
, priv
->regbase
+ UNIPHIER_SD_DMA_ADDR_L
);
301 /* suppress the warning "right shift count >= width of type" */
302 dma_addr
>>= min_t(int, 32, 8 * sizeof(dma_addr
));
304 writel(dma_addr
& U32_MAX
, priv
->regbase
+ UNIPHIER_SD_DMA_ADDR_H
);
306 writel(UNIPHIER_SD_DMA_CTL_START
, priv
->regbase
+ UNIPHIER_SD_DMA_CTL
);
309 static int uniphier_sd_dma_wait_for_irq(struct uniphier_sd_priv
*priv
, u32 flag
,
312 long wait
= 1000000 + 10 * blocks
;
314 while (!(readl(priv
->regbase
+ UNIPHIER_SD_DMA_INFO1
) & flag
)) {
316 dev_err(priv
->dev
, "timeout during DMA\n");
323 if (readl(priv
->regbase
+ UNIPHIER_SD_DMA_INFO2
)) {
324 dev_err(priv
->dev
, "error during DMA\n");
331 static int uniphier_sd_dma_xfer(struct mmc
*mmc
, struct mmc_data
*data
)
333 struct uniphier_sd_priv
*priv
= mmc
->priv
;
334 size_t len
= data
->blocks
* data
->blocksize
;
336 enum dma_data_direction dir
;
341 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_DMA_MODE
);
343 if (data
->flags
& MMC_DATA_READ
) {
345 dir
= DMA_FROM_DEVICE
;
346 poll_flag
= UNIPHIER_SD_DMA_INFO1_END_RD2
;
347 tmp
|= UNIPHIER_SD_DMA_MODE_DIR_RD
;
349 buf
= (void *)data
->src
;
351 poll_flag
= UNIPHIER_SD_DMA_INFO1_END_WR
;
352 tmp
&= ~UNIPHIER_SD_DMA_MODE_DIR_RD
;
355 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_DMA_MODE
);
357 dma_addr
= __dma_map_single(buf
, len
, dir
);
359 uniphier_sd_dma_start(priv
, dma_addr
);
361 ret
= uniphier_sd_dma_wait_for_irq(priv
, poll_flag
, data
->blocks
);
363 __dma_unmap_single(dma_addr
, len
, dir
);
368 /* check if the address is DMA'able */
369 static bool uniphier_sd_addr_is_dmaable(unsigned long addr
)
371 if (!IS_ALIGNED(addr
, UNIPHIER_SD_DMA_MINALIGN
))
374 #if defined(CONFIG_ARCH_UNIPHIER) && !defined(CONFIG_ARM64) && \
375 defined(CONFIG_SPL_BUILD)
377 * For UniPhier ARMv7 SoCs, the stack is allocated in the locked ways
378 * of L2, which is unreachable from the DMA engine.
380 if (addr
< CONFIG_SPL_STACK
)
387 static int uniphier_sd_send_cmd(struct mmc
*mmc
, struct mmc_cmd
*cmd
,
388 struct mmc_data
*data
)
390 struct uniphier_sd_priv
*priv
= mmc
->priv
;
394 if (readl(priv
->regbase
+ UNIPHIER_SD_INFO2
) & UNIPHIER_SD_INFO2_CBSY
) {
395 dev_err(priv
->dev
, "command busy\n");
399 /* clear all status flags */
400 writel(0, priv
->regbase
+ UNIPHIER_SD_INFO1
);
401 writel(0, priv
->regbase
+ UNIPHIER_SD_INFO2
);
403 /* disable DMA once */
404 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_EXTMODE
);
405 tmp
&= ~UNIPHIER_SD_EXTMODE_DMA_EN
;
406 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_EXTMODE
);
408 writel(cmd
->cmdarg
, priv
->regbase
+ UNIPHIER_SD_ARG
);
413 writel(data
->blocksize
, priv
->regbase
+ UNIPHIER_SD_SIZE
);
414 writel(data
->blocks
, priv
->regbase
+ UNIPHIER_SD_SECCNT
);
416 /* Do not send CMD12 automatically */
417 tmp
|= UNIPHIER_SD_CMD_NOSTOP
| UNIPHIER_SD_CMD_DATA
;
419 if (data
->blocks
> 1)
420 tmp
|= UNIPHIER_SD_CMD_MULTI
;
422 if (data
->flags
& MMC_DATA_READ
)
423 tmp
|= UNIPHIER_SD_CMD_RD
;
427 * Do not use the response type auto-detection on this hardware.
428 * CMD8, for example, has different response types on SD and eMMC,
429 * while this controller always assumes the response type for SD.
430 * Set the response type manually.
432 switch (cmd
->resp_type
) {
434 tmp
|= UNIPHIER_SD_CMD_RSP_NONE
;
437 tmp
|= UNIPHIER_SD_CMD_RSP_R1
;
440 tmp
|= UNIPHIER_SD_CMD_RSP_R1B
;
443 tmp
|= UNIPHIER_SD_CMD_RSP_R2
;
446 tmp
|= UNIPHIER_SD_CMD_RSP_R3
;
449 dev_err(priv
->dev
, "unknown response type\n");
453 dev_dbg(priv
->dev
, "sending CMD%d (SD_CMD=%08x, SD_ARG=%08x)\n",
454 cmd
->cmdidx
, tmp
, cmd
->cmdarg
);
455 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_CMD
);
457 ret
= uniphier_sd_wait_for_irq(priv
, UNIPHIER_SD_INFO1
,
458 UNIPHIER_SD_INFO1_RSP
);
462 if (cmd
->resp_type
& MMC_RSP_136
) {
463 u32 rsp_127_104
= readl(priv
->regbase
+ UNIPHIER_SD_RSP76
);
464 u32 rsp_103_72
= readl(priv
->regbase
+ UNIPHIER_SD_RSP54
);
465 u32 rsp_71_40
= readl(priv
->regbase
+ UNIPHIER_SD_RSP32
);
466 u32 rsp_39_8
= readl(priv
->regbase
+ UNIPHIER_SD_RSP10
);
468 cmd
->response
[0] = (rsp_127_104
& 0xffffff) << 8 |
470 cmd
->response
[1] = (rsp_103_72
& 0xffffff) << 8 |
472 cmd
->response
[2] = (rsp_71_40
& 0xffffff) << 8 |
474 cmd
->response
[3] = (rsp_39_8
& 0xffffff) << 8;
477 cmd
->response
[0] = readl(priv
->regbase
+ UNIPHIER_SD_RSP10
);
481 /* use DMA if the HW supports it and the buffer is aligned */
482 if (priv
->caps
& UNIPHIER_SD_CAP_DMA_INTERNAL
&&
483 uniphier_sd_addr_is_dmaable((long)data
->src
))
484 ret
= uniphier_sd_dma_xfer(mmc
, data
);
486 ret
= uniphier_sd_pio_xfer(mmc
, data
);
488 ret
= uniphier_sd_wait_for_irq(priv
, UNIPHIER_SD_INFO1
,
489 UNIPHIER_SD_INFO1_CMP
);
497 static void uniphier_sd_set_bus_width(struct uniphier_sd_priv
*priv
,
502 switch (mmc
->bus_width
) {
504 val
= UNIPHIER_SD_OPTION_WIDTH_1
;
507 val
= UNIPHIER_SD_OPTION_WIDTH_4
;
510 val
= UNIPHIER_SD_OPTION_WIDTH_8
;
517 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_OPTION
);
518 tmp
&= ~UNIPHIER_SD_OPTION_WIDTH_MASK
;
520 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_OPTION
);
523 static void uniphier_sd_set_ddr_mode(struct uniphier_sd_priv
*priv
,
528 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_IF_MODE
);
530 tmp
|= UNIPHIER_SD_IF_MODE_DDR
;
532 tmp
&= ~UNIPHIER_SD_IF_MODE_DDR
;
533 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_IF_MODE
);
536 static void uniphier_sd_set_clk_rate(struct uniphier_sd_priv
*priv
,
539 unsigned int divisor
;
545 divisor
= DIV_ROUND_UP(priv
->mclk
, mmc
->clock
);
548 val
= UNIPHIER_SD_CLKCTL_DIV1
;
549 else if (divisor
<= 2)
550 val
= UNIPHIER_SD_CLKCTL_DIV2
;
551 else if (divisor
<= 4)
552 val
= UNIPHIER_SD_CLKCTL_DIV4
;
553 else if (divisor
<= 8)
554 val
= UNIPHIER_SD_CLKCTL_DIV8
;
555 else if (divisor
<= 16)
556 val
= UNIPHIER_SD_CLKCTL_DIV16
;
557 else if (divisor
<= 32)
558 val
= UNIPHIER_SD_CLKCTL_DIV32
;
559 else if (divisor
<= 64)
560 val
= UNIPHIER_SD_CLKCTL_DIV64
;
561 else if (divisor
<= 128)
562 val
= UNIPHIER_SD_CLKCTL_DIV128
;
563 else if (divisor
<= 256)
564 val
= UNIPHIER_SD_CLKCTL_DIV256
;
565 else if (divisor
<= 512 || !(priv
->caps
& UNIPHIER_SD_CAP_DIV1024
))
566 val
= UNIPHIER_SD_CLKCTL_DIV512
;
568 val
= UNIPHIER_SD_CLKCTL_DIV1024
;
570 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_CLKCTL
);
572 /* stop the clock before changing its rate to avoid a glitch signal */
573 tmp
&= ~UNIPHIER_SD_CLKCTL_SCLKEN
;
574 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_CLKCTL
);
576 tmp
&= ~UNIPHIER_SD_CLKCTL_DIV_MASK
;
577 tmp
|= val
| UNIPHIER_SD_CLKCTL_OFFEN
;
578 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_CLKCTL
);
580 tmp
|= UNIPHIER_SD_CLKCTL_SCLKEN
;
581 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_CLKCTL
);
584 static void uniphier_sd_set_ios(struct mmc
*mmc
)
586 struct uniphier_sd_priv
*priv
= mmc
->priv
;
588 dev_dbg(priv
->dev
, "clock %uHz, DDRmode %d, width %u\n",
589 mmc
->clock
, mmc
->ddr_mode
, mmc
->bus_width
);
591 uniphier_sd_set_bus_width(priv
, mmc
);
592 uniphier_sd_set_ddr_mode(priv
, mmc
);
593 uniphier_sd_set_clk_rate(priv
, mmc
);
598 static int uniphier_sd_init(struct mmc
*mmc
)
600 struct uniphier_sd_priv
*priv
= mmc
->priv
;
603 /* soft reset of the host */
604 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_SOFT_RST
);
605 tmp
&= ~UNIPHIER_SD_SOFT_RST_RSTX
;
606 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_SOFT_RST
);
607 tmp
|= UNIPHIER_SD_SOFT_RST_RSTX
;
608 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_SOFT_RST
);
610 /* FIXME: implement eMMC hw_reset */
612 writel(UNIPHIER_SD_STOP_SEC
, priv
->regbase
+ UNIPHIER_SD_STOP
);
615 * Connected to 32bit AXI.
616 * This register dropped backward compatibility at version 0x10.
617 * Write an appropriate value depending on the IP version.
619 writel(priv
->version
>= 0x10 ? 0x00000101 : 0x00000000,
620 priv
->regbase
+ UNIPHIER_SD_HOST_MODE
);
622 if (priv
->caps
& UNIPHIER_SD_CAP_DMA_INTERNAL
) {
623 tmp
= readl(priv
->regbase
+ UNIPHIER_SD_DMA_MODE
);
624 tmp
|= UNIPHIER_SD_DMA_MODE_ADDR_INC
;
625 writel(tmp
, priv
->regbase
+ UNIPHIER_SD_DMA_MODE
);
631 static int uniphier_sd_getcd(struct mmc
*mmc
)
633 struct uniphier_sd_priv
*priv
= mmc
->priv
;
635 if (priv
->caps
& UNIPHIER_SD_CAP_NONREMOVABLE
)
638 return !!(readl(priv
->regbase
+ UNIPHIER_SD_INFO1
) &
639 UNIPHIER_SD_INFO1_CD
);
642 static const struct mmc_ops uniphier_sd_ops
= {
643 .send_cmd
= uniphier_sd_send_cmd
,
644 .set_ios
= uniphier_sd_set_ios
,
645 .init
= uniphier_sd_init
,
646 .getcd
= uniphier_sd_getcd
,
649 int uniphier_sd_probe(struct udevice
*dev
)
651 struct uniphier_sd_priv
*priv
= dev_get_priv(dev
);
652 struct mmc_uclass_priv
*upriv
= dev_get_uclass_priv(dev
);
654 struct udevice
*clk_dev
;
660 base
= dev_get_addr(dev
);
661 if (base
== FDT_ADDR_T_NONE
)
664 priv
->regbase
= map_sysmem(base
, SZ_2K
);
668 clk_id
= clk_get_by_index(dev
, 0, &clk_dev
);
670 dev_err(dev
, "failed to get host clock\n");
674 /* set to max rate */
675 priv
->mclk
= clk_set_periph_rate(clk_dev
, clk_id
, ULONG_MAX
);
676 if (IS_ERR_VALUE(priv
->mclk
)) {
677 dev_err(dev
, "failed to set rate for host clock\n");
681 ret
= clk_enable(clk_dev
, clk_id
);
683 dev_err(dev
, "failed to enable host clock\n");
687 priv
->cfg
.name
= dev
->name
;
688 priv
->cfg
.ops
= &uniphier_sd_ops
;
689 priv
->cfg
.host_caps
= MMC_MODE_HS_52MHz
| MMC_MODE_HS
;
691 switch (fdtdec_get_int(gd
->fdt_blob
, dev
->of_offset
, "bus-width", 1)) {
693 priv
->cfg
.host_caps
|= MMC_MODE_8BIT
;
696 priv
->cfg
.host_caps
|= MMC_MODE_4BIT
;
701 dev_err(dev
, "Invalid \"bus-width\" value\n");
705 if (fdt_get_property(gd
->fdt_blob
, dev
->of_offset
, "non-removable",
707 priv
->caps
|= UNIPHIER_SD_CAP_NONREMOVABLE
;
709 priv
->version
= readl(priv
->regbase
+ UNIPHIER_SD_VERSION
) &
710 UNIPHIER_SD_VERSION_IP
;
711 dev_dbg(dev
, "version %x\n", priv
->version
);
712 if (priv
->version
>= 0x10) {
713 priv
->caps
|= UNIPHIER_SD_CAP_DMA_INTERNAL
;
714 priv
->caps
|= UNIPHIER_SD_CAP_DIV1024
;
717 priv
->cfg
.voltages
= MMC_VDD_165_195
| MMC_VDD_32_33
| MMC_VDD_33_34
;
718 priv
->cfg
.f_min
= priv
->mclk
/
719 (priv
->caps
& UNIPHIER_SD_CAP_DIV1024
? 1024 : 512);
720 priv
->cfg
.f_max
= priv
->mclk
;
721 priv
->cfg
.b_max
= U32_MAX
; /* max value of UNIPHIER_SD_SECCNT */
723 priv
->mmc
= mmc_create(&priv
->cfg
, priv
);
727 upriv
->mmc
= priv
->mmc
;
728 priv
->mmc
->dev
= dev
;
733 int uniphier_sd_remove(struct udevice
*dev
)
735 struct uniphier_sd_priv
*priv
= dev_get_priv(dev
);
737 unmap_sysmem(priv
->regbase
);
738 mmc_destroy(priv
->mmc
);
743 static const struct udevice_id uniphier_sd_match
[] = {
744 { .compatible
= "socionext,uniphier-sdhc" },
748 U_BOOT_DRIVER(uniphier_mmc
) = {
749 .name
= "uniphier-mmc",
751 .of_match
= uniphier_sd_match
,
752 .probe
= uniphier_sd_probe
,
753 .remove
= uniphier_sd_remove
,
754 .priv_auto_alloc_size
= sizeof(struct uniphier_sd_priv
),