2 * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
5 * Based vaguely on the pxa mmc code:
7 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
9 * SPDX-License-Identifier: GPL-2.0+
20 #include <fsl_esdhc.h>
21 #include <fdt_support.h>
24 #include <asm-generic/gpio.h>
26 DECLARE_GLOBAL_DATA_PTR
;
28 #define SDHCI_IRQ_EN_BITS (IRQSTATEN_CC | IRQSTATEN_TC | \
30 IRQSTATEN_CTOE | IRQSTATEN_CCE | IRQSTATEN_CEBE | \
31 IRQSTATEN_CIE | IRQSTATEN_DTOE | IRQSTATEN_DCE | \
32 IRQSTATEN_DEBE | IRQSTATEN_BRR | IRQSTATEN_BWR | \
36 uint dsaddr
; /* SDMA system address register */
37 uint blkattr
; /* Block attributes register */
38 uint cmdarg
; /* Command argument register */
39 uint xfertyp
; /* Transfer type register */
40 uint cmdrsp0
; /* Command response 0 register */
41 uint cmdrsp1
; /* Command response 1 register */
42 uint cmdrsp2
; /* Command response 2 register */
43 uint cmdrsp3
; /* Command response 3 register */
44 uint datport
; /* Buffer data port register */
45 uint prsstat
; /* Present state register */
46 uint proctl
; /* Protocol control register */
47 uint sysctl
; /* System Control Register */
48 uint irqstat
; /* Interrupt status register */
49 uint irqstaten
; /* Interrupt status enable register */
50 uint irqsigen
; /* Interrupt signal enable register */
51 uint autoc12err
; /* Auto CMD error status register */
52 uint hostcapblt
; /* Host controller capabilities register */
53 uint wml
; /* Watermark level register */
54 uint mixctrl
; /* For USDHC */
55 char reserved1
[4]; /* reserved */
56 uint fevt
; /* Force event register */
57 uint admaes
; /* ADMA error status register */
58 uint adsaddr
; /* ADMA system address register */
62 uint clktunectrlstatus
;
68 uint hostver
; /* Host controller version register */
69 char reserved5
[4]; /* reserved */
70 uint dmaerraddr
; /* DMA error address register */
71 char reserved6
[4]; /* reserved */
72 uint dmaerrattr
; /* DMA error attribute register */
73 char reserved7
[4]; /* reserved */
74 uint hostcapblt2
; /* Host controller capabilities register 2 */
75 char reserved8
[8]; /* reserved */
76 uint tcr
; /* Tuning control register */
77 char reserved9
[28]; /* reserved */
78 uint sddirctl
; /* SD direction control register */
79 char reserved10
[712];/* reserved */
80 uint scr
; /* eSDHC control register */
84 * struct fsl_esdhc_priv
86 * @esdhc_regs: registers of the sdhc controller
87 * @sdhc_clk: Current clk of the sdhc controller
88 * @bus_width: bus width, 1bit, 4bit or 8bit
91 * Following is used when Driver Model is enabled for MMC
92 * @dev: pointer for the device
93 * @non_removable: 0: removable; 1: non-removable
94 * @wp_enable: 1: enable checking wp; 0: no check
95 * @cd_gpio: gpio for card detection
96 * @wp_gpio: gpio for write protection
98 struct fsl_esdhc_priv
{
99 struct fsl_esdhc
*esdhc_regs
;
100 unsigned int sdhc_clk
;
101 unsigned int bus_width
;
102 struct mmc_config cfg
;
107 #ifdef CONFIG_DM_GPIO
108 struct gpio_desc cd_gpio
;
109 struct gpio_desc wp_gpio
;
113 /* Return the XFERTYP flags for a given command and data packet */
114 static uint
esdhc_xfertyp(struct mmc_cmd
*cmd
, struct mmc_data
*data
)
119 xfertyp
|= XFERTYP_DPSEL
;
120 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
121 xfertyp
|= XFERTYP_DMAEN
;
123 if (data
->blocks
> 1) {
124 xfertyp
|= XFERTYP_MSBSEL
;
125 xfertyp
|= XFERTYP_BCEN
;
126 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
127 xfertyp
|= XFERTYP_AC12EN
;
131 if (data
->flags
& MMC_DATA_READ
)
132 xfertyp
|= XFERTYP_DTDSEL
;
135 if (cmd
->resp_type
& MMC_RSP_CRC
)
136 xfertyp
|= XFERTYP_CCCEN
;
137 if (cmd
->resp_type
& MMC_RSP_OPCODE
)
138 xfertyp
|= XFERTYP_CICEN
;
139 if (cmd
->resp_type
& MMC_RSP_136
)
140 xfertyp
|= XFERTYP_RSPTYP_136
;
141 else if (cmd
->resp_type
& MMC_RSP_BUSY
)
142 xfertyp
|= XFERTYP_RSPTYP_48_BUSY
;
143 else if (cmd
->resp_type
& MMC_RSP_PRESENT
)
144 xfertyp
|= XFERTYP_RSPTYP_48
;
146 if (cmd
->cmdidx
== MMC_CMD_STOP_TRANSMISSION
)
147 xfertyp
|= XFERTYP_CMDTYP_ABORT
;
149 return XFERTYP_CMD(cmd
->cmdidx
) | xfertyp
;
152 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
154 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
157 esdhc_pio_read_write(struct mmc
*mmc
, struct mmc_data
*data
)
159 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
160 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
168 if (data
->flags
& MMC_DATA_READ
) {
169 blocks
= data
->blocks
;
172 timeout
= PIO_TIMEOUT
;
173 size
= data
->blocksize
;
174 irqstat
= esdhc_read32(®s
->irqstat
);
175 while (!(esdhc_read32(®s
->prsstat
) & PRSSTAT_BREN
)
178 printf("\nData Read Failed in PIO Mode.");
181 while (size
&& (!(irqstat
& IRQSTAT_TC
))) {
182 udelay(100); /* Wait before last byte transfer complete */
183 irqstat
= esdhc_read32(®s
->irqstat
);
184 databuf
= in_le32(®s
->datport
);
185 *((uint
*)buffer
) = databuf
;
192 blocks
= data
->blocks
;
193 buffer
= (char *)data
->src
;
195 timeout
= PIO_TIMEOUT
;
196 size
= data
->blocksize
;
197 irqstat
= esdhc_read32(®s
->irqstat
);
198 while (!(esdhc_read32(®s
->prsstat
) & PRSSTAT_BWEN
)
201 printf("\nData Write Failed in PIO Mode.");
204 while (size
&& (!(irqstat
& IRQSTAT_TC
))) {
205 udelay(100); /* Wait before last byte transfer complete */
206 databuf
= *((uint
*)buffer
);
209 irqstat
= esdhc_read32(®s
->irqstat
);
210 out_le32(®s
->datport
, databuf
);
218 static int esdhc_setup_data(struct mmc
*mmc
, struct mmc_data
*data
)
221 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
222 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
223 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
228 wml_value
= data
->blocksize
/4;
230 if (data
->flags
& MMC_DATA_READ
) {
231 if (wml_value
> WML_RD_WML_MAX
)
232 wml_value
= WML_RD_WML_MAX_VAL
;
234 esdhc_clrsetbits32(®s
->wml
, WML_RD_WML_MASK
, wml_value
);
235 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
236 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
237 addr
= virt_to_phys((void *)(data
->dest
));
238 if (upper_32_bits(addr
))
239 printf("Error found for upper 32 bits\n");
241 esdhc_write32(®s
->dsaddr
, lower_32_bits(addr
));
243 esdhc_write32(®s
->dsaddr
, (u32
)data
->dest
);
247 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
248 flush_dcache_range((ulong
)data
->src
,
249 (ulong
)data
->src
+data
->blocks
252 if (wml_value
> WML_WR_WML_MAX
)
253 wml_value
= WML_WR_WML_MAX_VAL
;
254 if (priv
->wp_enable
) {
255 if ((esdhc_read32(®s
->prsstat
) &
256 PRSSTAT_WPSPL
) == 0) {
257 printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
262 esdhc_clrsetbits32(®s
->wml
, WML_WR_WML_MASK
,
264 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
265 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
266 addr
= virt_to_phys((void *)(data
->src
));
267 if (upper_32_bits(addr
))
268 printf("Error found for upper 32 bits\n");
270 esdhc_write32(®s
->dsaddr
, lower_32_bits(addr
));
272 esdhc_write32(®s
->dsaddr
, (u32
)data
->src
);
277 esdhc_write32(®s
->blkattr
, data
->blocks
<< 16 | data
->blocksize
);
279 /* Calculate the timeout period for data transactions */
281 * 1)Timeout period = (2^(timeout+13)) SD Clock cycles
282 * 2)Timeout period should be minimum 0.250sec as per SD Card spec
283 * So, Number of SD Clock cycles for 0.25sec should be minimum
284 * (SD Clock/sec * 0.25 sec) SD Clock cycles
285 * = (mmc->clock * 1/4) SD Clock cycles
287 * => (2^(timeout+13)) >= mmc->clock * 1/4
288 * Taking log2 both the sides
289 * => timeout + 13 >= log2(mmc->clock/4)
290 * Rounding up to next power of 2
291 * => timeout + 13 = log2(mmc->clock/4) + 1
292 * => timeout + 13 = fls(mmc->clock/4)
294 * However, the MMC spec "It is strongly recommended for hosts to
295 * implement more than 500ms timeout value even if the card
296 * indicates the 250ms maximum busy length." Even the previous
297 * value of 300ms is known to be insufficient for some cards.
299 * => timeout + 13 = fls(mmc->clock/2)
301 timeout
= fls(mmc
->clock
/2);
310 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
311 if ((timeout
== 4) || (timeout
== 8) || (timeout
== 12))
315 #ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
318 esdhc_clrsetbits32(®s
->sysctl
, SYSCTL_TIMEOUT_MASK
, timeout
<< 16);
323 static void check_and_invalidate_dcache_range
324 (struct mmc_cmd
*cmd
,
325 struct mmc_data
*data
) {
328 unsigned size
= roundup(ARCH_DMA_MINALIGN
,
329 data
->blocks
*data
->blocksize
);
330 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234)
333 addr
= virt_to_phys((void *)(data
->dest
));
334 if (upper_32_bits(addr
))
335 printf("Error found for upper 32 bits\n");
337 start
= lower_32_bits(addr
);
339 start
= (unsigned)data
->dest
;
342 invalidate_dcache_range(start
, end
);
346 * Sends a command out on the bus. Takes the mmc pointer,
347 * a command pointer, and an optional data pointer.
350 esdhc_send_cmd(struct mmc
*mmc
, struct mmc_cmd
*cmd
, struct mmc_data
*data
)
355 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
356 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
358 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
359 if (cmd
->cmdidx
== MMC_CMD_STOP_TRANSMISSION
)
363 esdhc_write32(®s
->irqstat
, -1);
367 /* Wait for the bus to be idle */
368 while ((esdhc_read32(®s
->prsstat
) & PRSSTAT_CICHB
) ||
369 (esdhc_read32(®s
->prsstat
) & PRSSTAT_CIDHB
))
372 while (esdhc_read32(®s
->prsstat
) & PRSSTAT_DLA
)
375 /* Wait at least 8 SD clock cycles before the next command */
377 * Note: This is way more than 8 cycles, but 1ms seems to
378 * resolve timing issues with some cards
382 /* Set up for a data transfer if we have one */
384 err
= esdhc_setup_data(mmc
, data
);
388 if (data
->flags
& MMC_DATA_READ
)
389 check_and_invalidate_dcache_range(cmd
, data
);
392 /* Figure out the transfer arguments */
393 xfertyp
= esdhc_xfertyp(cmd
, data
);
396 esdhc_write32(®s
->irqsigen
, 0);
398 /* Send the command */
399 esdhc_write32(®s
->cmdarg
, cmd
->cmdarg
);
400 #if defined(CONFIG_FSL_USDHC)
401 esdhc_write32(®s
->mixctrl
,
402 (esdhc_read32(®s
->mixctrl
) & 0xFFFFFF80) | (xfertyp
& 0x7F)
403 | (mmc
->ddr_mode
? XFERTYP_DDREN
: 0));
404 esdhc_write32(®s
->xfertyp
, xfertyp
& 0xFFFF0000);
406 esdhc_write32(®s
->xfertyp
, xfertyp
);
409 /* Wait for the command to complete */
410 while (!(esdhc_read32(®s
->irqstat
) & (IRQSTAT_CC
| IRQSTAT_CTOE
)))
413 irqstat
= esdhc_read32(®s
->irqstat
);
415 if (irqstat
& CMD_ERR
) {
420 if (irqstat
& IRQSTAT_CTOE
) {
425 /* Switch voltage to 1.8V if CMD11 succeeded */
426 if (cmd
->cmdidx
== SD_CMD_SWITCH_UHS18V
) {
427 esdhc_setbits32(®s
->vendorspec
, ESDHC_VENDORSPEC_VSELECT
);
429 printf("Run CMD11 1.8V switch\n");
430 /* Sleep for 5 ms - max time for card to switch to 1.8V */
434 /* Workaround for ESDHC errata ENGcm03648 */
435 if (!data
&& (cmd
->resp_type
& MMC_RSP_BUSY
)) {
438 /* Poll on DATA0 line for cmd with busy signal for 600 ms */
439 while (timeout
> 0 && !(esdhc_read32(®s
->prsstat
) &
446 printf("Timeout waiting for DAT0 to go high!\n");
452 /* Copy the response to the response buffer */
453 if (cmd
->resp_type
& MMC_RSP_136
) {
454 u32 cmdrsp3
, cmdrsp2
, cmdrsp1
, cmdrsp0
;
456 cmdrsp3
= esdhc_read32(®s
->cmdrsp3
);
457 cmdrsp2
= esdhc_read32(®s
->cmdrsp2
);
458 cmdrsp1
= esdhc_read32(®s
->cmdrsp1
);
459 cmdrsp0
= esdhc_read32(®s
->cmdrsp0
);
460 cmd
->response
[0] = (cmdrsp3
<< 8) | (cmdrsp2
>> 24);
461 cmd
->response
[1] = (cmdrsp2
<< 8) | (cmdrsp1
>> 24);
462 cmd
->response
[2] = (cmdrsp1
<< 8) | (cmdrsp0
>> 24);
463 cmd
->response
[3] = (cmdrsp0
<< 8);
465 cmd
->response
[0] = esdhc_read32(®s
->cmdrsp0
);
467 /* Wait until all of the blocks are transferred */
469 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
470 esdhc_pio_read_write(mmc
, data
);
473 irqstat
= esdhc_read32(®s
->irqstat
);
475 if (irqstat
& IRQSTAT_DTOE
) {
480 if (irqstat
& DATA_ERR
) {
484 } while ((irqstat
& DATA_COMPLETE
) != DATA_COMPLETE
);
487 * Need invalidate the dcache here again to avoid any
488 * cache-fill during the DMA operations such as the
489 * speculative pre-fetching etc.
491 if (data
->flags
& MMC_DATA_READ
)
492 check_and_invalidate_dcache_range(cmd
, data
);
497 /* Reset CMD and DATA portions on error */
499 esdhc_write32(®s
->sysctl
, esdhc_read32(®s
->sysctl
) |
501 while (esdhc_read32(®s
->sysctl
) & SYSCTL_RSTC
)
505 esdhc_write32(®s
->sysctl
,
506 esdhc_read32(®s
->sysctl
) |
508 while ((esdhc_read32(®s
->sysctl
) & SYSCTL_RSTD
))
512 /* If this was CMD11, then notify that power cycle is needed */
513 if (cmd
->cmdidx
== SD_CMD_SWITCH_UHS18V
)
514 printf("CMD11 to switch to 1.8V mode failed, card requires power cycle.\n");
517 esdhc_write32(®s
->irqstat
, -1);
522 static void set_sysctl(struct mmc
*mmc
, uint clock
)
525 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
526 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
527 int sdhc_clk
= priv
->sdhc_clk
;
530 if (clock
< mmc
->cfg
->f_min
)
531 clock
= mmc
->cfg
->f_min
;
533 if (sdhc_clk
/ 16 > clock
) {
534 for (pre_div
= 2; pre_div
< 256; pre_div
*= 2)
535 if ((sdhc_clk
/ pre_div
) <= (clock
* 16))
540 for (div
= 1; div
<= 16; div
++)
541 if ((sdhc_clk
/ (div
* pre_div
)) <= clock
)
544 pre_div
>>= mmc
->ddr_mode
? 2 : 1;
547 clk
= (pre_div
<< 8) | (div
<< 4);
549 #ifdef CONFIG_FSL_USDHC
550 esdhc_clrbits32(®s
->vendorspec
, VENDORSPEC_CKEN
);
552 esdhc_clrbits32(®s
->sysctl
, SYSCTL_CKEN
);
555 esdhc_clrsetbits32(®s
->sysctl
, SYSCTL_CLOCK_MASK
, clk
);
559 #ifdef CONFIG_FSL_USDHC
560 esdhc_setbits32(®s
->vendorspec
, VENDORSPEC_PEREN
| VENDORSPEC_CKEN
);
562 esdhc_setbits32(®s
->sysctl
, SYSCTL_PEREN
| SYSCTL_CKEN
);
567 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
568 static void esdhc_clock_control(struct mmc
*mmc
, bool enable
)
570 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
571 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
575 value
= esdhc_read32(®s
->sysctl
);
578 value
|= SYSCTL_CKEN
;
580 value
&= ~SYSCTL_CKEN
;
582 esdhc_write32(®s
->sysctl
, value
);
585 value
= PRSSTAT_SDSTB
;
586 while (!(esdhc_read32(®s
->prsstat
) & value
)) {
588 printf("fsl_esdhc: Internal clock never stabilised.\n");
597 static int esdhc_set_ios(struct mmc
*mmc
)
599 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
600 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
602 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
603 /* Select to use peripheral clock */
604 esdhc_clock_control(mmc
, false);
605 esdhc_setbits32(®s
->scr
, ESDHCCTL_PCS
);
606 esdhc_clock_control(mmc
, true);
608 /* Set the clock speed */
609 set_sysctl(mmc
, mmc
->clock
);
611 /* Set the bus width */
612 esdhc_clrbits32(®s
->proctl
, PROCTL_DTW_4
| PROCTL_DTW_8
);
614 if (mmc
->bus_width
== 4)
615 esdhc_setbits32(®s
->proctl
, PROCTL_DTW_4
);
616 else if (mmc
->bus_width
== 8)
617 esdhc_setbits32(®s
->proctl
, PROCTL_DTW_8
);
622 static int esdhc_init(struct mmc
*mmc
)
624 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
625 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
628 /* Reset the entire host controller */
629 esdhc_setbits32(®s
->sysctl
, SYSCTL_RSTA
);
631 /* Wait until the controller is available */
632 while ((esdhc_read32(®s
->sysctl
) & SYSCTL_RSTA
) && --timeout
)
635 #if defined(CONFIG_FSL_USDHC)
636 /* RSTA doesn't reset MMC_BOOT register, so manually reset it */
637 esdhc_write32(®s
->mmcboot
, 0x0);
638 /* Reset MIX_CTRL and CLK_TUNE_CTRL_STATUS regs to 0 */
639 esdhc_write32(®s
->mixctrl
, 0x0);
640 esdhc_write32(®s
->clktunectrlstatus
, 0x0);
642 /* Put VEND_SPEC to default value */
643 esdhc_write32(®s
->vendorspec
, VENDORSPEC_INIT
);
645 /* Disable DLL_CTRL delay line */
646 esdhc_write32(®s
->dllctrl
, 0x0);
650 /* Enable cache snooping */
651 esdhc_write32(®s
->scr
, 0x00000040);
654 #ifndef CONFIG_FSL_USDHC
655 esdhc_setbits32(®s
->sysctl
, SYSCTL_HCKEN
| SYSCTL_IPGEN
);
657 esdhc_setbits32(®s
->vendorspec
, VENDORSPEC_HCKEN
| VENDORSPEC_IPGEN
);
660 /* Set the initial clock speed */
661 mmc_set_clock(mmc
, 400000);
663 /* Disable the BRR and BWR bits in IRQSTAT */
664 esdhc_clrbits32(®s
->irqstaten
, IRQSTATEN_BRR
| IRQSTATEN_BWR
);
666 /* Put the PROCTL reg back to the default */
667 esdhc_write32(®s
->proctl
, PROCTL_INIT
);
669 /* Set timout to the maximum value */
670 esdhc_clrsetbits32(®s
->sysctl
, SYSCTL_TIMEOUT_MASK
, 14 << 16);
672 #ifdef CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT
673 esdhc_setbits32(®s
->vendorspec
, ESDHC_VENDORSPEC_VSELECT
);
679 static int esdhc_getcd(struct mmc
*mmc
)
681 struct fsl_esdhc_priv
*priv
= mmc
->priv
;
682 struct fsl_esdhc
*regs
= priv
->esdhc_regs
;
685 #ifdef CONFIG_ESDHC_DETECT_QUIRK
686 if (CONFIG_ESDHC_DETECT_QUIRK
)
691 if (priv
->non_removable
)
693 #ifdef CONFIG_DM_GPIO
694 if (dm_gpio_is_valid(&priv
->cd_gpio
))
695 return dm_gpio_get_value(&priv
->cd_gpio
);
699 while (!(esdhc_read32(®s
->prsstat
) & PRSSTAT_CINS
) && --timeout
)
705 static void esdhc_reset(struct fsl_esdhc
*regs
)
707 unsigned long timeout
= 100; /* wait max 100 ms */
709 /* reset the controller */
710 esdhc_setbits32(®s
->sysctl
, SYSCTL_RSTA
);
712 /* hardware clears the bit when it is done */
713 while ((esdhc_read32(®s
->sysctl
) & SYSCTL_RSTA
) && --timeout
)
716 printf("MMC/SD: Reset never completed.\n");
719 static const struct mmc_ops esdhc_ops
= {
720 .send_cmd
= esdhc_send_cmd
,
721 .set_ios
= esdhc_set_ios
,
723 .getcd
= esdhc_getcd
,
726 static int fsl_esdhc_cfg_to_priv(struct fsl_esdhc_cfg
*cfg
,
727 struct fsl_esdhc_priv
*priv
)
732 priv
->esdhc_regs
= (struct fsl_esdhc
*)(unsigned long)(cfg
->esdhc_base
);
733 priv
->bus_width
= cfg
->max_bus_width
;
734 priv
->sdhc_clk
= cfg
->sdhc_clk
;
735 priv
->wp_enable
= cfg
->wp_enable
;
740 static int fsl_esdhc_init(struct fsl_esdhc_priv
*priv
)
742 struct fsl_esdhc
*regs
;
744 u32 caps
, voltage_caps
;
749 regs
= priv
->esdhc_regs
;
751 /* First reset the eSDHC controller */
754 #ifndef CONFIG_FSL_USDHC
755 esdhc_setbits32(®s
->sysctl
, SYSCTL_PEREN
| SYSCTL_HCKEN
756 | SYSCTL_IPGEN
| SYSCTL_CKEN
);
758 esdhc_setbits32(®s
->vendorspec
, VENDORSPEC_PEREN
|
759 VENDORSPEC_HCKEN
| VENDORSPEC_IPGEN
| VENDORSPEC_CKEN
);
762 writel(SDHCI_IRQ_EN_BITS
, ®s
->irqstaten
);
763 memset(&priv
->cfg
, 0, sizeof(priv
->cfg
));
766 caps
= esdhc_read32(®s
->hostcapblt
);
768 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
769 caps
= caps
& ~(ESDHC_HOSTCAPBLT_SRS
|
770 ESDHC_HOSTCAPBLT_VS18
| ESDHC_HOSTCAPBLT_VS30
);
773 /* T4240 host controller capabilities register should have VS33 bit */
774 #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
775 caps
= caps
| ESDHC_HOSTCAPBLT_VS33
;
778 if (caps
& ESDHC_HOSTCAPBLT_VS18
)
779 voltage_caps
|= MMC_VDD_165_195
;
780 if (caps
& ESDHC_HOSTCAPBLT_VS30
)
781 voltage_caps
|= MMC_VDD_29_30
| MMC_VDD_30_31
;
782 if (caps
& ESDHC_HOSTCAPBLT_VS33
)
783 voltage_caps
|= MMC_VDD_32_33
| MMC_VDD_33_34
;
785 priv
->cfg
.name
= "FSL_SDHC";
786 priv
->cfg
.ops
= &esdhc_ops
;
787 #ifdef CONFIG_SYS_SD_VOLTAGE
788 priv
->cfg
.voltages
= CONFIG_SYS_SD_VOLTAGE
;
790 priv
->cfg
.voltages
= MMC_VDD_32_33
| MMC_VDD_33_34
;
792 if ((priv
->cfg
.voltages
& voltage_caps
) == 0) {
793 printf("voltage not supported by controller\n");
797 if (priv
->bus_width
== 8)
798 priv
->cfg
.host_caps
= MMC_MODE_4BIT
| MMC_MODE_8BIT
;
799 else if (priv
->bus_width
== 4)
800 priv
->cfg
.host_caps
= MMC_MODE_4BIT
;
802 priv
->cfg
.host_caps
= MMC_MODE_4BIT
| MMC_MODE_8BIT
;
803 #ifdef CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE
804 priv
->cfg
.host_caps
|= MMC_MODE_DDR_52MHz
;
807 if (priv
->bus_width
> 0) {
808 if (priv
->bus_width
< 8)
809 priv
->cfg
.host_caps
&= ~MMC_MODE_8BIT
;
810 if (priv
->bus_width
< 4)
811 priv
->cfg
.host_caps
&= ~MMC_MODE_4BIT
;
814 if (caps
& ESDHC_HOSTCAPBLT_HSS
)
815 priv
->cfg
.host_caps
|= MMC_MODE_HS_52MHz
| MMC_MODE_HS
;
817 #ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
818 if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK
)
819 priv
->cfg
.host_caps
&= ~MMC_MODE_8BIT
;
822 priv
->cfg
.f_min
= 400000;
823 priv
->cfg
.f_max
= min(priv
->sdhc_clk
, (u32
)52000000);
825 priv
->cfg
.b_max
= CONFIG_SYS_MMC_MAX_BLK_COUNT
;
827 mmc
= mmc_create(&priv
->cfg
, priv
);
836 int fsl_esdhc_initialize(bd_t
*bis
, struct fsl_esdhc_cfg
*cfg
)
838 struct fsl_esdhc_priv
*priv
;
844 priv
= calloc(sizeof(struct fsl_esdhc_priv
), 1);
848 ret
= fsl_esdhc_cfg_to_priv(cfg
, priv
);
850 debug("%s xlate failure\n", __func__
);
855 ret
= fsl_esdhc_init(priv
);
857 debug("%s init failure\n", __func__
);
865 int fsl_esdhc_mmc_init(bd_t
*bis
)
867 struct fsl_esdhc_cfg
*cfg
;
869 cfg
= calloc(sizeof(struct fsl_esdhc_cfg
), 1);
870 cfg
->esdhc_base
= CONFIG_SYS_FSL_ESDHC_ADDR
;
871 cfg
->sdhc_clk
= gd
->arch
.sdhc_clk
;
872 return fsl_esdhc_initialize(bis
, cfg
);
875 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
876 void mmc_adapter_card_type_ident(void)
881 card_id
= QIXIS_READ(present
) & QIXIS_SDID_MASK
;
882 gd
->arch
.sdhc_adapter
= card_id
;
885 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC45
:
886 value
= QIXIS_READ(brdcfg
[5]);
887 value
|= (QIXIS_DAT4
| QIXIS_DAT5_6_7
);
888 QIXIS_WRITE(brdcfg
[5], value
);
890 case QIXIS_ESDHC_ADAPTER_TYPE_SDMMC_LEGACY
:
891 value
= QIXIS_READ(pwr_ctl
[1]);
892 value
|= QIXIS_EVDD_BY_SDHC_VS
;
893 QIXIS_WRITE(pwr_ctl
[1], value
);
895 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC44
:
896 value
= QIXIS_READ(brdcfg
[5]);
897 value
|= (QIXIS_SDCLKIN
| QIXIS_SDCLKOUT
);
898 QIXIS_WRITE(brdcfg
[5], value
);
900 case QIXIS_ESDHC_ADAPTER_TYPE_RSV
:
902 case QIXIS_ESDHC_ADAPTER_TYPE_MMC
:
904 case QIXIS_ESDHC_ADAPTER_TYPE_SD
:
906 case QIXIS_ESDHC_NO_ADAPTER
:
914 #ifdef CONFIG_OF_LIBFDT
915 __weak
int esdhc_status_fixup(void *blob
, const char *compat
)
917 #ifdef CONFIG_FSL_ESDHC_PIN_MUX
918 if (!hwconfig("esdhc")) {
919 do_fixup_by_compat(blob
, compat
, "status", "disabled",
920 sizeof("disabled"), 1);
924 do_fixup_by_compat(blob
, compat
, "status", "okay",
929 void fdt_fixup_esdhc(void *blob
, bd_t
*bd
)
931 const char *compat
= "fsl,esdhc";
933 if (esdhc_status_fixup(blob
, compat
))
936 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
937 do_fixup_by_compat_u32(blob
, compat
, "peripheral-frequency",
938 gd
->arch
.sdhc_clk
, 1);
940 do_fixup_by_compat_u32(blob
, compat
, "clock-frequency",
941 gd
->arch
.sdhc_clk
, 1);
943 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
944 do_fixup_by_compat_u32(blob
, compat
, "adapter-type",
945 (u32
)(gd
->arch
.sdhc_adapter
), 1);
951 #include <asm/arch/clock.h>
952 __weak
void init_clk_usdhc(u32 index
)
956 static int fsl_esdhc_probe(struct udevice
*dev
)
958 struct mmc_uclass_priv
*upriv
= dev_get_uclass_priv(dev
);
959 struct fsl_esdhc_priv
*priv
= dev_get_priv(dev
);
960 const void *fdt
= gd
->fdt_blob
;
961 int node
= dev_of_offset(dev
);
966 addr
= devfdt_get_addr(dev
);
967 if (addr
== FDT_ADDR_T_NONE
)
970 priv
->esdhc_regs
= (struct fsl_esdhc
*)addr
;
973 val
= fdtdec_get_int(fdt
, node
, "bus-width", -1);
981 if (fdt_get_property(fdt
, node
, "non-removable", NULL
)) {
982 priv
->non_removable
= 1;
984 priv
->non_removable
= 0;
985 #ifdef CONFIG_DM_GPIO
986 gpio_request_by_name_nodev(fdt
, node
, "cd-gpios", 0,
987 &priv
->cd_gpio
, GPIOD_IS_IN
);
993 #ifdef CONFIG_DM_GPIO
994 ret
= gpio_request_by_name_nodev(fdt
, node
, "wp-gpios", 0,
995 &priv
->wp_gpio
, GPIOD_IS_IN
);
1001 * Because lack of clk driver, if SDHC clk is not enabled,
1002 * need to enable it first before this driver is invoked.
1004 * we use MXC_ESDHC_CLK to get clk freq.
1005 * If one would like to make this function work,
1006 * the aliases should be provided in dts as this:
1014 * Then if your board only supports mmc2 and mmc3, but we can
1015 * correctly get the seq as 2 and 3, then let mxc_get_clock
1019 init_clk_usdhc(dev
->seq
);
1021 priv
->sdhc_clk
= mxc_get_clock(MXC_ESDHC_CLK
+ dev
->seq
);
1022 if (priv
->sdhc_clk
<= 0) {
1023 dev_err(dev
, "Unable to get clk for %s\n", dev
->name
);
1027 ret
= fsl_esdhc_init(priv
);
1029 dev_err(dev
, "fsl_esdhc_init failure\n");
1033 upriv
->mmc
= priv
->mmc
;
1034 priv
->mmc
->dev
= dev
;
1039 static const struct udevice_id fsl_esdhc_ids
[] = {
1040 { .compatible
= "fsl,imx6ul-usdhc", },
1041 { .compatible
= "fsl,imx6sx-usdhc", },
1042 { .compatible
= "fsl,imx6sl-usdhc", },
1043 { .compatible
= "fsl,imx6q-usdhc", },
1044 { .compatible
= "fsl,imx7d-usdhc", },
1045 { .compatible
= "fsl,imx7ulp-usdhc", },
1046 { .compatible
= "fsl,esdhc", },
1050 U_BOOT_DRIVER(fsl_esdhc
) = {
1051 .name
= "fsl-esdhc-mmc",
1053 .of_match
= fsl_esdhc_ids
,
1054 .probe
= fsl_esdhc_probe
,
1055 .priv_auto_alloc_size
= sizeof(struct fsl_esdhc_priv
),