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u-boot/drivers/mmc/fsl_esdhc_imx.c
Peng Fan 744c5fde97 drivers: mmc: fsl_esdhc_imx: support i.MX8ULP 
i.MX8ULP reuse same SDHC IP as i.MX8M, so follow i.MX8M code logic.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-08-09 14:46:51 +02:00

1758 lines
44 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
* Copyright 2019, 2021 NXP
* Andy Fleming
* Yangbo Lu <yangbo.lu@nxp.com>
*
* Based vaguely on the pxa mmc code:
* (C) Copyright 2003
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*/
#include <config.h>
#include <common.h>
#include <command.h>
#include <clk.h>
#include <cpu_func.h>
#include <errno.h>
#include <hwconfig.h>
#include <log.h>
#include <mmc.h>
#include <part.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <dm/device_compat.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <power/regulator.h>
#include <malloc.h>
#include <fsl_esdhc_imx.h>
#include <fdt_support.h>
#include <asm/io.h>
#include <dm.h>
#include <asm-generic/gpio.h>
#include <dm/pinctrl.h>
#include <dt-structs.h>
#include <mapmem.h>
#include <dm/ofnode.h>
#include <linux/iopoll.h>
#if !CONFIG_IS_ENABLED(BLK)
#include "mmc_private.h"
#endif
#ifndef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
#ifdef CONFIG_FSL_USDHC
#define ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE 1
#endif
#endif
DECLARE_GLOBAL_DATA_PTR;
#define SDHCI_IRQ_EN_BITS (IRQSTATEN_CC | IRQSTATEN_TC | \
IRQSTATEN_CINT | \
IRQSTATEN_CTOE | IRQSTATEN_CCE | IRQSTATEN_CEBE | \
IRQSTATEN_CIE | IRQSTATEN_DTOE | IRQSTATEN_DCE | \
IRQSTATEN_DEBE | IRQSTATEN_BRR | IRQSTATEN_BWR | \
IRQSTATEN_DINT)
#define MAX_TUNING_LOOP 40
#define ESDHC_DRIVER_STAGE_VALUE 0xffffffff
struct fsl_esdhc {
uint dsaddr; /* SDMA system address register */
uint blkattr; /* Block attributes register */
uint cmdarg; /* Command argument register */
uint xfertyp; /* Transfer type register */
uint cmdrsp0; /* Command response 0 register */
uint cmdrsp1; /* Command response 1 register */
uint cmdrsp2; /* Command response 2 register */
uint cmdrsp3; /* Command response 3 register */
uint datport; /* Buffer data port register */
uint prsstat; /* Present state register */
uint proctl; /* Protocol control register */
uint sysctl; /* System Control Register */
uint irqstat; /* Interrupt status register */
uint irqstaten; /* Interrupt status enable register */
uint irqsigen; /* Interrupt signal enable register */
uint autoc12err; /* Auto CMD error status register */
uint hostcapblt; /* Host controller capabilities register */
uint wml; /* Watermark level register */
uint mixctrl; /* For USDHC */
char reserved1[4]; /* reserved */
uint fevt; /* Force event register */
uint admaes; /* ADMA error status register */
uint adsaddr; /* ADMA system address register */
char reserved2[4];
uint dllctrl;
uint dllstat;
uint clktunectrlstatus;
char reserved3[4];
uint strobe_dllctrl;
uint strobe_dllstat;
char reserved4[72];
uint vendorspec;
uint mmcboot;
uint vendorspec2;
uint tuning_ctrl; /* on i.MX6/7/8/RT */
char reserved5[44];
uint hostver; /* Host controller version register */
char reserved6[4]; /* reserved */
uint dmaerraddr; /* DMA error address register */
char reserved7[4]; /* reserved */
uint dmaerrattr; /* DMA error attribute register */
char reserved8[4]; /* reserved */
uint hostcapblt2; /* Host controller capabilities register 2 */
char reserved9[8]; /* reserved */
uint tcr; /* Tuning control register */
char reserved10[28]; /* reserved */
uint sddirctl; /* SD direction control register */
char reserved11[712];/* reserved */
uint scr; /* eSDHC control register */
};
struct fsl_esdhc_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
/* Put this first since driver model will copy the data here */
struct dtd_fsl_esdhc dtplat;
#endif
struct mmc_config cfg;
struct mmc mmc;
};
struct esdhc_soc_data {
u32 flags;
};
/**
* struct fsl_esdhc_priv
*
* @esdhc_regs: registers of the sdhc controller
* @sdhc_clk: Current clk of the sdhc controller
* @bus_width: bus width, 1bit, 4bit or 8bit
* @cfg: mmc config
* @mmc: mmc
* Following is used when Driver Model is enabled for MMC
* @dev: pointer for the device
* @non_removable: 0: removable; 1: non-removable
* @broken_cd: 0: use GPIO for card detect; 1: Do not use GPIO for card detect
* @wp_enable: 1: enable checking wp; 0: no check
* @vs18_enable: 1: use 1.8V voltage; 0: use 3.3V
* @flags: ESDHC_FLAG_xx in include/fsl_esdhc_imx.h
* @caps: controller capabilities
* @tuning_step: tuning step setting in tuning_ctrl register
* @start_tuning_tap: the start point for tuning in tuning_ctrl register
* @strobe_dll_delay_target: settings in strobe_dllctrl
* @signal_voltage: indicating the current voltage
* @signal_voltage_switch_extra_delay_ms: extra delay for IO voltage switch
* @cd_gpio: gpio for card detection
* @wp_gpio: gpio for write protection
*/
struct fsl_esdhc_priv {
struct fsl_esdhc *esdhc_regs;
unsigned int sdhc_clk;
struct clk per_clk;
unsigned int clock;
unsigned int mode;
unsigned int bus_width;
#if !CONFIG_IS_ENABLED(BLK)
struct mmc *mmc;
#endif
struct udevice *dev;
int non_removable;
int broken_cd;
int wp_enable;
int vs18_enable;
u32 flags;
u32 caps;
u32 tuning_step;
u32 tuning_start_tap;
u32 strobe_dll_delay_target;
u32 signal_voltage;
u32 signal_voltage_switch_extra_delay_ms;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
struct udevice *vqmmc_dev;
struct udevice *vmmc_dev;
#endif
#if CONFIG_IS_ENABLED(DM_GPIO)
struct gpio_desc cd_gpio;
struct gpio_desc wp_gpio;
#endif
};
/* Return the XFERTYP flags for a given command and data packet */
static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
{
uint xfertyp = 0;
if (data) {
xfertyp |= XFERTYP_DPSEL;
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
xfertyp |= XFERTYP_DMAEN;
#endif
if (data->blocks > 1) {
xfertyp |= XFERTYP_MSBSEL;
xfertyp |= XFERTYP_BCEN;
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
xfertyp |= XFERTYP_AC12EN;
#endif
}
if (data->flags & MMC_DATA_READ)
xfertyp |= XFERTYP_DTDSEL;
}
if (cmd->resp_type & MMC_RSP_CRC)
xfertyp |= XFERTYP_CCCEN;
if (cmd->resp_type & MMC_RSP_OPCODE)
xfertyp |= XFERTYP_CICEN;
if (cmd->resp_type & MMC_RSP_136)
xfertyp |= XFERTYP_RSPTYP_136;
else if (cmd->resp_type & MMC_RSP_BUSY)
xfertyp |= XFERTYP_RSPTYP_48_BUSY;
else if (cmd->resp_type & MMC_RSP_PRESENT)
xfertyp |= XFERTYP_RSPTYP_48;
if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
xfertyp |= XFERTYP_CMDTYP_ABORT;
return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
}
#ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
/*
* PIO Read/Write Mode reduce the performace as DMA is not used in this mode.
*/
static void esdhc_pio_read_write(struct fsl_esdhc_priv *priv,
struct mmc_data *data)
{
struct fsl_esdhc *regs = priv->esdhc_regs;
uint blocks;
char *buffer;
uint databuf;
uint size;
uint irqstat;
ulong start;
if (data->flags & MMC_DATA_READ) {
blocks = data->blocks;
buffer = data->dest;
while (blocks) {
start = get_timer(0);
size = data->blocksize;
irqstat = esdhc_read32(&regs->irqstat);
while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_BREN)) {
if (get_timer(start) > PIO_TIMEOUT) {
printf("\nData Read Failed in PIO Mode.");
return;
}
}
while (size && (!(irqstat & IRQSTAT_TC))) {
udelay(100); /* Wait before last byte transfer complete */
irqstat = esdhc_read32(&regs->irqstat);
databuf = in_le32(&regs->datport);
*((uint *)buffer) = databuf;
buffer += 4;
size -= 4;
}
blocks--;
}
} else {
blocks = data->blocks;
buffer = (char *)data->src;
while (blocks) {
start = get_timer(0);
size = data->blocksize;
irqstat = esdhc_read32(&regs->irqstat);
while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_BWEN)) {
if (get_timer(start) > PIO_TIMEOUT) {
printf("\nData Write Failed in PIO Mode.");
return;
}
}
while (size && (!(irqstat & IRQSTAT_TC))) {
udelay(100); /* Wait before last byte transfer complete */
databuf = *((uint *)buffer);
buffer += 4;
size -= 4;
irqstat = esdhc_read32(&regs->irqstat);
out_le32(&regs->datport, databuf);
}
blocks--;
}
}
}
#endif
static int esdhc_setup_data(struct fsl_esdhc_priv *priv, struct mmc *mmc,
struct mmc_data *data)
{
int timeout;
struct fsl_esdhc *regs = priv->esdhc_regs;
#if defined(CONFIG_S32V234) || defined(CONFIG_IMX8) || defined(CONFIG_IMX8M) || \
defined(CONFIG_IMX8ULP)
dma_addr_t addr;
#endif
uint wml_value;
wml_value = data->blocksize/4;
if (data->flags & MMC_DATA_READ) {
if (wml_value > WML_RD_WML_MAX)
wml_value = WML_RD_WML_MAX_VAL;
esdhc_clrsetbits32(&regs->wml, WML_RD_WML_MASK, wml_value);
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
#if defined(CONFIG_S32V234) || defined(CONFIG_IMX8) || defined(CONFIG_IMX8M) || \
defined(CONFIG_IMX8ULP)
addr = virt_to_phys((void *)(data->dest));
if (upper_32_bits(addr))
printf("Error found for upper 32 bits\n");
else
esdhc_write32(&regs->dsaddr, lower_32_bits(addr));
#else
esdhc_write32(&regs->dsaddr, (u32)data->dest);
#endif
#endif
} else {
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
flush_dcache_range((ulong)data->src,
(ulong)data->src+data->blocks
*data->blocksize);
#endif
if (wml_value > WML_WR_WML_MAX)
wml_value = WML_WR_WML_MAX_VAL;
if (priv->wp_enable) {
if ((esdhc_read32(&regs->prsstat) &
PRSSTAT_WPSPL) == 0) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return -ETIMEDOUT;
}
} else {
#if CONFIG_IS_ENABLED(DM_GPIO)
if (dm_gpio_is_valid(&priv->wp_gpio) &&
dm_gpio_get_value(&priv->wp_gpio)) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return -ETIMEDOUT;
}
#endif
}
esdhc_clrsetbits32(&regs->wml, WML_WR_WML_MASK,
wml_value << 16);
#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO
#if defined(CONFIG_S32V234) || defined(CONFIG_IMX8) || defined(CONFIG_IMX8M) || \
defined(CONFIG_IMX8ULP)
addr = virt_to_phys((void *)(data->src));
if (upper_32_bits(addr))
printf("Error found for upper 32 bits\n");
else
esdhc_write32(&regs->dsaddr, lower_32_bits(addr));
#else
esdhc_write32(&regs->dsaddr, (u32)data->src);
#endif
#endif
}
esdhc_write32(&regs->blkattr, data->blocks << 16 | data->blocksize);
/* Calculate the timeout period for data transactions */
/*
* 1)Timeout period = (2^(timeout+13)) SD Clock cycles
* 2)Timeout period should be minimum 0.250sec as per SD Card spec
* So, Number of SD Clock cycles for 0.25sec should be minimum
* (SD Clock/sec * 0.25 sec) SD Clock cycles
* = (mmc->clock * 1/4) SD Clock cycles
* As 1) >= 2)
* => (2^(timeout+13)) >= mmc->clock * 1/4
* Taking log2 both the sides
* => timeout + 13 >= log2(mmc->clock/4)
* Rounding up to next power of 2
* => timeout + 13 = log2(mmc->clock/4) + 1
* => timeout + 13 = fls(mmc->clock/4)
*
* However, the MMC spec "It is strongly recommended for hosts to
* implement more than 500ms timeout value even if the card
* indicates the 250ms maximum busy length." Even the previous
* value of 300ms is known to be insufficient for some cards.
* So, we use
* => timeout + 13 = fls(mmc->clock/2)
*/
timeout = fls(mmc->clock/2);
timeout -= 13;
if (timeout > 14)
timeout = 14;
if (timeout < 0)
timeout = 0;
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
if ((timeout == 4) || (timeout == 8) || (timeout == 12))
timeout++;
#endif
#ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE
timeout = 0xE;
#endif
esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
return 0;
}
static void check_and_invalidate_dcache_range
(struct mmc_cmd *cmd,
struct mmc_data *data) {
unsigned start = 0;
unsigned end = 0;
unsigned size = roundup(ARCH_DMA_MINALIGN,
data->blocks*data->blocksize);
#if defined(CONFIG_S32V234) || defined(CONFIG_IMX8) || defined(CONFIG_IMX8M) || \
defined(CONFIG_IMX8ULP)
dma_addr_t addr;
addr = virt_to_phys((void *)(data->dest));
if (upper_32_bits(addr))
printf("Error found for upper 32 bits\n");
else
start = lower_32_bits(addr);
#else
start = (unsigned)data->dest;
#endif
end = start + size;
invalidate_dcache_range(start, end);
}
#ifdef CONFIG_MCF5441x
/*
* Swaps 32-bit words to little-endian byte order.
*/
static inline void sd_swap_dma_buff(struct mmc_data *data)
{
int i, size = data->blocksize >> 2;
u32 *buffer = (u32 *)data->dest;
u32 sw;
while (data->blocks--) {
for (i = 0; i < size; i++) {
sw = __sw32(*buffer);
*buffer++ = sw;
}
}
}
#endif
/*
* Sends a command out on the bus. Takes the mmc pointer,
* a command pointer, and an optional data pointer.
*/
static int esdhc_send_cmd_common(struct fsl_esdhc_priv *priv, struct mmc *mmc,
struct mmc_cmd *cmd, struct mmc_data *data)
{
int err = 0;
uint xfertyp;
uint irqstat;
u32 flags = IRQSTAT_CC | IRQSTAT_CTOE;
struct fsl_esdhc *regs = priv->esdhc_regs;
unsigned long start;
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
return 0;
#endif
esdhc_write32(&regs->irqstat, -1);
sync();
/* Wait for the bus to be idle */
while ((esdhc_read32(&regs->prsstat) & PRSSTAT_CICHB) ||
(esdhc_read32(&regs->prsstat) & PRSSTAT_CIDHB))
;
while (esdhc_read32(&regs->prsstat) & PRSSTAT_DLA)
;
/* Set up for a data transfer if we have one */
if (data) {
err = esdhc_setup_data(priv, mmc, data);
if(err)
return err;
if (data->flags & MMC_DATA_READ)
check_and_invalidate_dcache_range(cmd, data);
}
/* Figure out the transfer arguments */
xfertyp = esdhc_xfertyp(cmd, data);
/* Mask all irqs */
esdhc_write32(&regs->irqsigen, 0);
/* Send the command */
esdhc_write32(&regs->cmdarg, cmd->cmdarg);
#if defined(CONFIG_FSL_USDHC)
esdhc_write32(&regs->mixctrl,
(esdhc_read32(&regs->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F)
| (mmc->ddr_mode ? XFERTYP_DDREN : 0));
esdhc_write32(&regs->xfertyp, xfertyp & 0xFFFF0000);
#else
esdhc_write32(&regs->xfertyp, xfertyp);
#endif
if ((cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK) ||
(cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200))
flags = IRQSTAT_BRR;
/* Wait for the command to complete */
start = get_timer(0);
while (!(esdhc_read32(&regs->irqstat) & flags)) {
if (get_timer(start) > 1000) {
err = -ETIMEDOUT;
goto out;
}
}
irqstat = esdhc_read32(&regs->irqstat);
if (irqstat & CMD_ERR) {
err = -ECOMM;
goto out;
}
if (irqstat & IRQSTAT_CTOE) {
err = -ETIMEDOUT;
goto out;
}
/* Workaround for ESDHC errata ENGcm03648 */
if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
int timeout = 50000;
/* Poll on DATA0 line for cmd with busy signal for 5000 ms */
while (timeout > 0 && !(esdhc_read32(&regs->prsstat) &
PRSSTAT_DAT0)) {
udelay(100);
timeout--;
}
if (timeout <= 0) {
printf("Timeout waiting for DAT0 to go high!\n");
err = -ETIMEDOUT;
goto out;
}
}
/* Copy the response to the response buffer */
if (cmd->resp_type & MMC_RSP_136) {
u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
cmdrsp3 = esdhc_read32(&regs->cmdrsp3);
cmdrsp2 = esdhc_read32(&regs->cmdrsp2);
cmdrsp1 = esdhc_read32(&regs->cmdrsp1);
cmdrsp0 = esdhc_read32(&regs->cmdrsp0);
cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
cmd->response[3] = (cmdrsp0 << 8);
} else
cmd->response[0] = esdhc_read32(&regs->cmdrsp0);
/* Wait until all of the blocks are transferred */
if (data) {
#ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO
esdhc_pio_read_write(priv, data);
#else
flags = DATA_COMPLETE;
if ((cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK) ||
(cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200)) {
flags = IRQSTAT_BRR;
}
do {
irqstat = esdhc_read32(&regs->irqstat);
if (irqstat & IRQSTAT_DTOE) {
err = -ETIMEDOUT;
goto out;
}
if (irqstat & DATA_ERR) {
err = -ECOMM;
goto out;
}
} while ((irqstat & flags) != flags);
/*
* Need invalidate the dcache here again to avoid any
* cache-fill during the DMA operations such as the
* speculative pre-fetching etc.
*/
if (data->flags & MMC_DATA_READ) {
check_and_invalidate_dcache_range(cmd, data);
#ifdef CONFIG_MCF5441x
sd_swap_dma_buff(data);
#endif
}
#endif
}
out:
/* Reset CMD and DATA portions on error */
if (err) {
esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) |
SYSCTL_RSTC);
while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC)
;
if (data) {
esdhc_write32(&regs->sysctl,
esdhc_read32(&regs->sysctl) |
SYSCTL_RSTD);
while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTD))
;
}
/* If this was CMD11, then notify that power cycle is needed */
if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V)
printf("CMD11 to switch to 1.8V mode failed, card requires power cycle.\n");
}
esdhc_write32(&regs->irqstat, -1);
return err;
}
static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
{
struct fsl_esdhc *regs = priv->esdhc_regs;
int div = 1;
u32 tmp;
int ret;
#ifdef ARCH_MXC
#ifdef CONFIG_MX53
/* For i.MX53 eSDHCv3, SYSCTL.SDCLKFS may not be set to 0. */
int pre_div = (regs == (struct fsl_esdhc *)MMC_SDHC3_BASE_ADDR) ? 2 : 1;
#else
int pre_div = 1;
#endif
#else
int pre_div = 2;
#endif
int ddr_pre_div = mmc->ddr_mode ? 2 : 1;
int sdhc_clk = priv->sdhc_clk;
uint clk;
while (sdhc_clk / (16 * pre_div * ddr_pre_div) > clock && pre_div < 256)
pre_div *= 2;
while (sdhc_clk / (div * pre_div * ddr_pre_div) > clock && div < 16)
div++;
pre_div >>= 1;
div -= 1;
clk = (pre_div << 8) | (div << 4);
#ifdef CONFIG_FSL_USDHC
esdhc_clrbits32(&regs->vendorspec, VENDORSPEC_CKEN);
#else
esdhc_clrbits32(&regs->sysctl, SYSCTL_CKEN);
#endif
esdhc_clrsetbits32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
ret = readx_poll_timeout(esdhc_read32, &regs->prsstat, tmp, tmp & PRSSTAT_SDSTB, 100);
if (ret)
pr_warn("fsl_esdhc_imx: Internal clock never stabilised.\n");
#ifdef CONFIG_FSL_USDHC
esdhc_setbits32(&regs->vendorspec, VENDORSPEC_PEREN | VENDORSPEC_CKEN);
#else
esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_CKEN);
#endif
priv->clock = clock;
}
#ifdef MMC_SUPPORTS_TUNING
static int esdhc_change_pinstate(struct udevice *dev)
{
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
int ret;
switch (priv->mode) {
case UHS_SDR50:
case UHS_DDR50:
ret = pinctrl_select_state(dev, "state_100mhz");
break;
case UHS_SDR104:
case MMC_HS_200:
case MMC_HS_400:
case MMC_HS_400_ES:
ret = pinctrl_select_state(dev, "state_200mhz");
break;
default:
ret = pinctrl_select_state(dev, "default");
break;
}
if (ret)
printf("%s %d error\n", __func__, priv->mode);
return ret;
}
static void esdhc_reset_tuning(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
struct fsl_esdhc *regs = priv->esdhc_regs;
if (priv->flags & ESDHC_FLAG_USDHC) {
if (priv->flags & ESDHC_FLAG_STD_TUNING) {
esdhc_clrbits32(&regs->autoc12err,
MIX_CTRL_SMPCLK_SEL |
MIX_CTRL_EXE_TUNE);
}
}
}
static void esdhc_set_strobe_dll(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
struct fsl_esdhc *regs = priv->esdhc_regs;
u32 val;
if (priv->clock > ESDHC_STROBE_DLL_CLK_FREQ) {
esdhc_write32(&regs->strobe_dllctrl, ESDHC_STROBE_DLL_CTRL_RESET);
/*
* enable strobe dll ctrl and adjust the delay target
* for the uSDHC loopback read clock
*/
val = ESDHC_STROBE_DLL_CTRL_ENABLE |
(priv->strobe_dll_delay_target <<
ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT);
esdhc_write32(&regs->strobe_dllctrl, val);
/* wait 1us to make sure strobe dll status register stable */
mdelay(1);
val = esdhc_read32(&regs->strobe_dllstat);
if (!(val & ESDHC_STROBE_DLL_STS_REF_LOCK))
pr_warn("HS400 strobe DLL status REF not lock!\n");
if (!(val & ESDHC_STROBE_DLL_STS_SLV_LOCK))
pr_warn("HS400 strobe DLL status SLV not lock!\n");
}
}
static int esdhc_set_timing(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
struct fsl_esdhc *regs = priv->esdhc_regs;
u32 mixctrl;
mixctrl = esdhc_read32(&regs->mixctrl);
mixctrl &= ~(MIX_CTRL_DDREN | MIX_CTRL_HS400_EN);
switch (mmc->selected_mode) {
case MMC_LEGACY:
esdhc_reset_tuning(mmc);
esdhc_write32(&regs->mixctrl, mixctrl);
break;
case MMC_HS_400:
case MMC_HS_400_ES:
mixctrl |= MIX_CTRL_DDREN | MIX_CTRL_HS400_EN;
esdhc_write32(&regs->mixctrl, mixctrl);
break;
case MMC_HS:
case MMC_HS_52:
case MMC_HS_200:
case SD_HS:
case UHS_SDR12:
case UHS_SDR25:
case UHS_SDR50:
case UHS_SDR104:
esdhc_write32(&regs->mixctrl, mixctrl);
break;
case UHS_DDR50:
case MMC_DDR_52:
mixctrl |= MIX_CTRL_DDREN;
esdhc_write32(&regs->mixctrl, mixctrl);
break;
default:
printf("Not supported %d\n", mmc->selected_mode);
return -EINVAL;
}
priv->mode = mmc->selected_mode;
return esdhc_change_pinstate(mmc->dev);
}
static int esdhc_set_voltage(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = dev_get_priv(mmc->dev);
struct fsl_esdhc *regs = priv->esdhc_regs;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
int ret;
#endif
priv->signal_voltage = mmc->signal_voltage;
switch (mmc->signal_voltage) {
case MMC_SIGNAL_VOLTAGE_330:
if (priv->vs18_enable)
return -ENOTSUPP;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (!IS_ERR_OR_NULL(priv->vqmmc_dev)) {
ret = regulator_set_value(priv->vqmmc_dev, 3300000);
if (ret) {
printf("Setting to 3.3V error");
return -EIO;
}
/* Wait for 5ms */
mdelay(5);
}
#endif
esdhc_clrbits32(&regs->vendorspec, ESDHC_VENDORSPEC_VSELECT);
if (!(esdhc_read32(&regs->vendorspec) &
ESDHC_VENDORSPEC_VSELECT))
return 0;
return -EAGAIN;
case MMC_SIGNAL_VOLTAGE_180:
#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (!IS_ERR_OR_NULL(priv->vqmmc_dev)) {
ret = regulator_set_value(priv->vqmmc_dev, 1800000);
if (ret) {
printf("Setting to 1.8V error");
return -EIO;
}
}
#endif
esdhc_setbits32(&regs->vendorspec, ESDHC_VENDORSPEC_VSELECT);
/*
* some board like imx8mm-evk need about 18ms to switch
* the IO voltage from 3.3v to 1.8v, common code only
* delay 10ms, so need to delay extra time to make sure
* the IO voltage change to 1.8v.
*/
if (priv->signal_voltage_switch_extra_delay_ms)
mdelay(priv->signal_voltage_switch_extra_delay_ms);
if (esdhc_read32(&regs->vendorspec) & ESDHC_VENDORSPEC_VSELECT)
return 0;
return -EAGAIN;
case MMC_SIGNAL_VOLTAGE_120:
return -ENOTSUPP;
default:
return 0;
}
}
static void esdhc_stop_tuning(struct mmc *mmc)
{
struct mmc_cmd cmd;
cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
cmd.cmdarg = 0;
cmd.resp_type = MMC_RSP_R1b;
mmc_send_cmd(mmc, &cmd, NULL);
}
static int fsl_esdhc_execute_tuning(struct udevice *dev, uint32_t opcode)
{
struct fsl_esdhc_plat *plat = dev_get_plat(dev);
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
struct fsl_esdhc *regs = priv->esdhc_regs;
struct mmc *mmc = &plat->mmc;
u32 irqstaten = esdhc_read32(&regs->irqstaten);
u32 irqsigen = esdhc_read32(&regs->irqsigen);
int i, ret = -ETIMEDOUT;
u32 val, mixctrl;
/* clock tuning is not needed for upto 52MHz */
if (mmc->clock <= 52000000)
return 0;
/* This is readw/writew SDHCI_HOST_CONTROL2 when tuning */
if (priv->flags & ESDHC_FLAG_STD_TUNING) {
val = esdhc_read32(&regs->autoc12err);
mixctrl = esdhc_read32(&regs->mixctrl);
val &= ~MIX_CTRL_SMPCLK_SEL;
mixctrl &= ~(MIX_CTRL_FBCLK_SEL | MIX_CTRL_AUTO_TUNE_EN);
val |= MIX_CTRL_EXE_TUNE;
mixctrl |= MIX_CTRL_FBCLK_SEL | MIX_CTRL_AUTO_TUNE_EN;
esdhc_write32(&regs->autoc12err, val);
esdhc_write32(&regs->mixctrl, mixctrl);
}
/* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); */
mixctrl = esdhc_read32(&regs->mixctrl);
mixctrl = MIX_CTRL_DTDSEL_READ | (mixctrl & ~MIX_CTRL_SDHCI_MASK);
esdhc_write32(&regs->mixctrl, mixctrl);
esdhc_write32(&regs->irqstaten, IRQSTATEN_BRR);
esdhc_write32(&regs->irqsigen, IRQSTATEN_BRR);
/*
* Issue opcode repeatedly till Execute Tuning is set to 0 or the number
* of loops reaches 40 times.
*/
for (i = 0; i < MAX_TUNING_LOOP; i++) {
u32 ctrl;
if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200) {
if (mmc->bus_width == 8)
esdhc_write32(&regs->blkattr, 0x7080);
else if (mmc->bus_width == 4)
esdhc_write32(&regs->blkattr, 0x7040);
} else {
esdhc_write32(&regs->blkattr, 0x7040);
}
/* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE) */
val = esdhc_read32(&regs->mixctrl);
val = MIX_CTRL_DTDSEL_READ | (val & ~MIX_CTRL_SDHCI_MASK);
esdhc_write32(&regs->mixctrl, val);
/* We are using STD tuning, no need to check return value */
mmc_send_tuning(mmc, opcode, NULL);
ctrl = esdhc_read32(&regs->autoc12err);
if ((!(ctrl & MIX_CTRL_EXE_TUNE)) &&
(ctrl & MIX_CTRL_SMPCLK_SEL)) {
ret = 0;
break;
}
}
esdhc_write32(&regs->irqstaten, irqstaten);
esdhc_write32(&regs->irqsigen, irqsigen);
esdhc_stop_tuning(mmc);
return ret;
}
#endif
static int esdhc_set_ios_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
{
struct fsl_esdhc *regs = priv->esdhc_regs;
int ret __maybe_unused;
u32 clock;
#ifdef MMC_SUPPORTS_TUNING
/*
* call esdhc_set_timing() before update the clock rate,
* This is because current we support DDR and SDR mode,
* Once the DDR_EN bit is set, the card clock will be
* divide by 2 automatically. So need to do this before
* setting clock rate.
*/
if (priv->mode != mmc->selected_mode) {
ret = esdhc_set_timing(mmc);
if (ret) {
printf("esdhc_set_timing error %d\n", ret);
return ret;
}
}
#endif
/* Set the clock speed */
clock = mmc->clock;
if (clock < mmc->cfg->f_min)
clock = mmc->cfg->f_min;
if (priv->clock != clock)
set_sysctl(priv, mmc, clock);
#ifdef MMC_SUPPORTS_TUNING
if (mmc->clk_disable) {
#ifdef CONFIG_FSL_USDHC
esdhc_clrbits32(&regs->vendorspec, VENDORSPEC_CKEN);
#else
esdhc_clrbits32(&regs->sysctl, SYSCTL_CKEN);
#endif
} else {
#ifdef CONFIG_FSL_USDHC
esdhc_setbits32(&regs->vendorspec, VENDORSPEC_PEREN |
VENDORSPEC_CKEN);
#else
esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_CKEN);
#endif
}
/*
* For HS400/HS400ES mode, make sure set the strobe dll in the
* target clock rate. So call esdhc_set_strobe_dll() after the
* clock updated.
*/
if (mmc->selected_mode == MMC_HS_400 || mmc->selected_mode == MMC_HS_400_ES)
esdhc_set_strobe_dll(mmc);
if (priv->signal_voltage != mmc->signal_voltage) {
ret = esdhc_set_voltage(mmc);
if (ret) {
if (ret != -ENOTSUPP)
printf("esdhc_set_voltage error %d\n", ret);
return ret;
}
}
#endif
/* Set the bus width */
esdhc_clrbits32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
if (mmc->bus_width == 4)
esdhc_setbits32(&regs->proctl, PROCTL_DTW_4);
else if (mmc->bus_width == 8)
esdhc_setbits32(&regs->proctl, PROCTL_DTW_8);
return 0;
}
static int esdhc_init_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
{
struct fsl_esdhc *regs = priv->esdhc_regs;
ulong start;
/* Reset the entire host controller */
esdhc_setbits32(&regs->sysctl, SYSCTL_RSTA);
/* Wait until the controller is available */
start = get_timer(0);
while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTA)) {
if (get_timer(start) > 1000)
return -ETIMEDOUT;
}
#if defined(CONFIG_FSL_USDHC)
/* RSTA doesn't reset MMC_BOOT register, so manually reset it */
esdhc_write32(&regs->mmcboot, 0x0);
/* Reset MIX_CTRL and CLK_TUNE_CTRL_STATUS regs to 0 */
esdhc_write32(&regs->mixctrl, 0x0);
esdhc_write32(&regs->clktunectrlstatus, 0x0);
/* Put VEND_SPEC to default value */
if (priv->vs18_enable)
esdhc_write32(&regs->vendorspec, (VENDORSPEC_INIT |
ESDHC_VENDORSPEC_VSELECT));
else
esdhc_write32(&regs->vendorspec, VENDORSPEC_INIT);
/* Disable DLL_CTRL delay line */
esdhc_write32(&regs->dllctrl, 0x0);
#endif
#ifndef ARCH_MXC
/* Enable cache snooping */
esdhc_write32(&regs->scr, 0x00000040);
#endif
#ifndef CONFIG_FSL_USDHC
esdhc_setbits32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
#else
esdhc_setbits32(&regs->vendorspec, VENDORSPEC_HCKEN | VENDORSPEC_IPGEN);
#endif
/* Set the initial clock speed */
mmc_set_clock(mmc, 400000, MMC_CLK_ENABLE);
/* Disable the BRR and BWR bits in IRQSTAT */
esdhc_clrbits32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
#ifdef CONFIG_MCF5441x
esdhc_write32(&regs->proctl, PROCTL_INIT | PROCTL_D3CD);
#else
/* Put the PROCTL reg back to the default */
esdhc_write32(&regs->proctl, PROCTL_INIT);
#endif
/* Set timout to the maximum value */
esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
return 0;
}
static int esdhc_getcd_common(struct fsl_esdhc_priv *priv)
{
struct fsl_esdhc *regs = priv->esdhc_regs;
int timeout = 1000;
#ifdef CONFIG_ESDHC_DETECT_QUIRK
if (CONFIG_ESDHC_DETECT_QUIRK)
return 1;
#endif
#if CONFIG_IS_ENABLED(DM_MMC)
if (priv->non_removable)
return 1;
if (priv->broken_cd)
return 1;
#if CONFIG_IS_ENABLED(DM_GPIO)
if (dm_gpio_is_valid(&priv->cd_gpio))
return dm_gpio_get_value(&priv->cd_gpio);
#endif
#endif
while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_CINS) && --timeout)
udelay(1000);
return timeout > 0;
}
static int esdhc_reset(struct fsl_esdhc *regs)
{
ulong start;
/* reset the controller */
esdhc_setbits32(&regs->sysctl, SYSCTL_RSTA);
/* hardware clears the bit when it is done */
start = get_timer(0);
while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTA)) {
if (get_timer(start) > 100) {
printf("MMC/SD: Reset never completed.\n");
return -ETIMEDOUT;
}
}
return 0;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
static int esdhc_getcd(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = mmc->priv;
return esdhc_getcd_common(priv);
}
static int esdhc_init(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = mmc->priv;
return esdhc_init_common(priv, mmc);
}
static int esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct fsl_esdhc_priv *priv = mmc->priv;
return esdhc_send_cmd_common(priv, mmc, cmd, data);
}
static int esdhc_set_ios(struct mmc *mmc)
{
struct fsl_esdhc_priv *priv = mmc->priv;
return esdhc_set_ios_common(priv, mmc);
}
static const struct mmc_ops esdhc_ops = {
.getcd = esdhc_getcd,
.init = esdhc_init,
.send_cmd = esdhc_send_cmd,
.set_ios = esdhc_set_ios,
};
#endif
static int fsl_esdhc_init(struct fsl_esdhc_priv *priv,
struct fsl_esdhc_plat *plat)
{
struct mmc_config *cfg;
struct fsl_esdhc *regs;
u32 caps, voltage_caps;
int ret;
if (!priv)
return -EINVAL;
regs = priv->esdhc_regs;
/* First reset the eSDHC controller */
ret = esdhc_reset(regs);
if (ret)
return ret;
#ifdef CONFIG_MCF5441x
/* ColdFire, using SDHC_DATA[3] for card detection */
esdhc_write32(&regs->proctl, PROCTL_INIT | PROCTL_D3CD);
#endif
#ifndef CONFIG_FSL_USDHC
esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
| SYSCTL_IPGEN | SYSCTL_CKEN);
/* Clearing tuning bits in case ROM has set it already */
esdhc_write32(&regs->mixctrl, 0);
esdhc_write32(&regs->autoc12err, 0);
esdhc_write32(&regs->clktunectrlstatus, 0);
#else
esdhc_setbits32(&regs->vendorspec, VENDORSPEC_PEREN |
VENDORSPEC_HCKEN | VENDORSPEC_IPGEN | VENDORSPEC_CKEN);
#endif
if (priv->vs18_enable)
esdhc_setbits32(&regs->vendorspec, ESDHC_VENDORSPEC_VSELECT);
esdhc_write32(&regs->irqstaten, SDHCI_IRQ_EN_BITS);
cfg = &plat->cfg;
#ifndef CONFIG_DM_MMC
memset(cfg, '\0', sizeof(*cfg));
#endif
voltage_caps = 0;
caps = esdhc_read32(&regs->hostcapblt);
#ifdef CONFIG_MCF5441x
/*
* MCF5441x RM declares in more points that sdhc clock speed must
* never exceed 25 Mhz. From this, the HS bit needs to be disabled
* from host capabilities.
*/
caps &= ~ESDHC_HOSTCAPBLT_HSS;
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135
caps = caps & ~(ESDHC_HOSTCAPBLT_SRS |
ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30);
#endif
if (caps & ESDHC_HOSTCAPBLT_VS18)
voltage_caps |= MMC_VDD_165_195;
if (caps & ESDHC_HOSTCAPBLT_VS30)
voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
if (caps & ESDHC_HOSTCAPBLT_VS33)
voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
cfg->name = "FSL_SDHC";
#if !CONFIG_IS_ENABLED(DM_MMC)
cfg->ops = &esdhc_ops;
#endif
#ifdef CONFIG_SYS_SD_VOLTAGE
cfg->voltages = CONFIG_SYS_SD_VOLTAGE;
#else
cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
#endif
if ((cfg->voltages & voltage_caps) == 0) {
printf("voltage not supported by controller\n");
return -1;
}
if (priv->bus_width == 8)
cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
else if (priv->bus_width == 4)
cfg->host_caps = MMC_MODE_4BIT;
cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
#ifdef CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE
cfg->host_caps |= MMC_MODE_DDR_52MHz;
#endif
if (priv->bus_width > 0) {
if (priv->bus_width < 8)
cfg->host_caps &= ~MMC_MODE_8BIT;
if (priv->bus_width < 4)
cfg->host_caps &= ~MMC_MODE_4BIT;
}
if (caps & ESDHC_HOSTCAPBLT_HSS)
cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
#ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK)
cfg->host_caps &= ~MMC_MODE_8BIT;
#endif
cfg->host_caps |= priv->caps;
cfg->f_min = 400000;
cfg->f_max = min(priv->sdhc_clk, (u32)200000000);
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
esdhc_write32(&regs->dllctrl, 0);
if (priv->flags & ESDHC_FLAG_USDHC) {
if (priv->flags & ESDHC_FLAG_STD_TUNING) {
u32 val = esdhc_read32(&regs->tuning_ctrl);
val |= ESDHC_STD_TUNING_EN;
val &= ~ESDHC_TUNING_START_TAP_MASK;
val |= priv->tuning_start_tap;
val &= ~ESDHC_TUNING_STEP_MASK;
val |= (priv->tuning_step) << ESDHC_TUNING_STEP_SHIFT;
/* Disable the CMD CRC check for tuning, if not, need to
* add some delay after every tuning command, because
* hardware standard tuning logic will directly go to next
* step once it detect the CMD CRC error, will not wait for
* the card side to finally send out the tuning data, trigger
* the buffer read ready interrupt immediately. If usdhc send
* the next tuning command some eMMC card will stuck, can't
* response, block the tuning procedure or the first command
* after the whole tuning procedure always can't get any response.
*/
val |= ESDHC_TUNING_CMD_CRC_CHECK_DISABLE;
esdhc_write32(&regs->tuning_ctrl, val);
}
}
return 0;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
static int fsl_esdhc_cfg_to_priv(struct fsl_esdhc_cfg *cfg,
struct fsl_esdhc_priv *priv)
{
if (!cfg || !priv)
return -EINVAL;
priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base);
priv->bus_width = cfg->max_bus_width;
priv->sdhc_clk = cfg->sdhc_clk;
priv->wp_enable = cfg->wp_enable;
priv->vs18_enable = cfg->vs18_enable;
return 0;
};
int fsl_esdhc_initialize(struct bd_info *bis, struct fsl_esdhc_cfg *cfg)
{
struct fsl_esdhc_plat *plat;
struct fsl_esdhc_priv *priv;
struct mmc *mmc;
int ret;
if (!cfg)
return -EINVAL;
priv = calloc(sizeof(struct fsl_esdhc_priv), 1);
if (!priv)
return -ENOMEM;
plat = calloc(sizeof(struct fsl_esdhc_plat), 1);
if (!plat) {
free(priv);
return -ENOMEM;
}
ret = fsl_esdhc_cfg_to_priv(cfg, priv);
if (ret) {
debug("%s xlate failure\n", __func__);
free(plat);
free(priv);
return ret;
}
ret = fsl_esdhc_init(priv, plat);
if (ret) {
debug("%s init failure\n", __func__);
free(plat);
free(priv);
return ret;
}
mmc = mmc_create(&plat->cfg, priv);
if (!mmc)
return -EIO;
priv->mmc = mmc;
return 0;
}
int fsl_esdhc_mmc_init(struct bd_info *bis)
{
struct fsl_esdhc_cfg *cfg;
cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1);
cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
cfg->sdhc_clk = gd->arch.sdhc_clk;
return fsl_esdhc_initialize(bis, cfg);
}
#endif
#ifdef CONFIG_OF_LIBFDT
__weak int esdhc_status_fixup(void *blob, const char *compat)
{
#ifdef CONFIG_FSL_ESDHC_PIN_MUX
if (!hwconfig("esdhc")) {
do_fixup_by_compat(blob, compat, "status", "disabled",
sizeof("disabled"), 1);
return 1;
}
#endif
return 0;
}
void fdt_fixup_esdhc(void *blob, struct bd_info *bd)
{
const char *compat = "fsl,esdhc";
if (esdhc_status_fixup(blob, compat))
return;
do_fixup_by_compat_u32(blob, compat, "clock-frequency",
gd->arch.sdhc_clk, 1);
}
#endif
#if CONFIG_IS_ENABLED(DM_MMC)
#include <asm/arch/clock.h>
__weak void init_clk_usdhc(u32 index)
{
}
static int fsl_esdhc_of_to_plat(struct udevice *dev)
{
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
#if CONFIG_IS_ENABLED(DM_REGULATOR)
struct udevice *vqmmc_dev;
int ret;
#endif
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(dev);
fdt_addr_t addr;
unsigned int val;
addr = dev_read_addr(dev);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
priv->esdhc_regs = (struct fsl_esdhc *)addr;
priv->dev = dev;
priv->mode = -1;
val = dev_read_u32_default(dev, "bus-width", -1);
if (val == 8)
priv->bus_width = 8;
else if (val == 4)
priv->bus_width = 4;
else
priv->bus_width = 1;
val = fdtdec_get_int(fdt, node, "fsl,tuning-step", 1);
priv->tuning_step = val;
val = fdtdec_get_int(fdt, node, "fsl,tuning-start-tap",
ESDHC_TUNING_START_TAP_DEFAULT);
priv->tuning_start_tap = val;
val = fdtdec_get_int(fdt, node, "fsl,strobe-dll-delay-target",
ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_DEFAULT);
priv->strobe_dll_delay_target = val;
val = fdtdec_get_int(fdt, node, "fsl,signal-voltage-switch-extra-delay-ms", 0);
priv->signal_voltage_switch_extra_delay_ms = val;
if (dev_read_bool(dev, "broken-cd"))
priv->broken_cd = 1;
if (dev_read_bool(dev, "non-removable")) {
priv->non_removable = 1;
} else {
priv->non_removable = 0;
#if CONFIG_IS_ENABLED(DM_GPIO)
gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
GPIOD_IS_IN);
#endif
}
if (dev_read_prop(dev, "fsl,wp-controller", NULL)) {
priv->wp_enable = 1;
} else {
priv->wp_enable = 0;
#if CONFIG_IS_ENABLED(DM_GPIO)
gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio,
GPIOD_IS_IN);
#endif
}
priv->vs18_enable = 0;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
/*
* If emmc I/O has a fixed voltage at 1.8V, this must be provided,
* otherwise, emmc will work abnormally.
*/
ret = device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_dev);
if (ret) {
dev_dbg(dev, "no vqmmc-supply\n");
} else {
priv->vqmmc_dev = vqmmc_dev;
ret = regulator_set_enable(vqmmc_dev, true);
if (ret) {
dev_err(dev, "fail to enable vqmmc-supply\n");
return ret;
}
if (regulator_get_value(vqmmc_dev) == 1800000)
priv->vs18_enable = 1;
}
#endif
#endif
return 0;
}
static int fsl_esdhc_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct fsl_esdhc_plat *plat = dev_get_plat(dev);
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
struct esdhc_soc_data *data =
(struct esdhc_soc_data *)dev_get_driver_data(dev);
struct mmc *mmc;
#if !CONFIG_IS_ENABLED(BLK)
struct blk_desc *bdesc;
#endif
int ret;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_fsl_esdhc *dtplat = &plat->dtplat;
unsigned int val;
priv->esdhc_regs = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
val = plat->dtplat.bus_width;
if (val == 8)
priv->bus_width = 8;
else if (val == 4)
priv->bus_width = 4;
else
priv->bus_width = 1;
if (dtplat->non_removable)
priv->non_removable = 1;
else
priv->non_removable = 0;
if (CONFIG_IS_ENABLED(DM_GPIO) && !priv->non_removable) {
struct udevice *gpiodev;
ret = device_get_by_ofplat_idx(dtplat->cd_gpios->idx, &gpiodev);
if (ret)
return ret;
ret = gpio_dev_request_index(gpiodev, gpiodev->name, "cd-gpios",
dtplat->cd_gpios->arg[0], GPIOD_IS_IN,
dtplat->cd_gpios->arg[1], &priv->cd_gpio);
if (ret)
return ret;
}
#endif
if (data)
priv->flags = data->flags;
/*
* TODO:
* Because lack of clk driver, if SDHC clk is not enabled,
* need to enable it first before this driver is invoked.
*
* we use MXC_ESDHC_CLK to get clk freq.
* If one would like to make this function work,
* the aliases should be provided in dts as this:
*
* aliases {
* mmc0 = &usdhc1;
* mmc1 = &usdhc2;
* mmc2 = &usdhc3;
* mmc3 = &usdhc4;
* };
* Then if your board only supports mmc2 and mmc3, but we can
* correctly get the seq as 2 and 3, then let mxc_get_clock
* work as expected.
*/
init_clk_usdhc(dev_seq(dev));
#if CONFIG_IS_ENABLED(CLK)
/* Assigned clock already set clock */
ret = clk_get_by_name(dev, "per", &priv->per_clk);
if (ret) {
printf("Failed to get per_clk\n");
return ret;
}
ret = clk_enable(&priv->per_clk);
if (ret) {
printf("Failed to enable per_clk\n");
return ret;
}
priv->sdhc_clk = clk_get_rate(&priv->per_clk);
#else
priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev_seq(dev));
if (priv->sdhc_clk <= 0) {
dev_err(dev, "Unable to get clk for %s\n", dev->name);
return -EINVAL;
}
#endif
ret = fsl_esdhc_init(priv, plat);
if (ret) {
dev_err(dev, "fsl_esdhc_init failure\n");
return ret;
}
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
ret = mmc_of_parse(dev, &plat->cfg);
if (ret)
return ret;
#endif
mmc = &plat->mmc;
mmc->cfg = &plat->cfg;
mmc->dev = dev;
#if !CONFIG_IS_ENABLED(BLK)
mmc->priv = priv;
/* Setup dsr related values */
mmc->dsr_imp = 0;
mmc->dsr = ESDHC_DRIVER_STAGE_VALUE;
/* Setup the universal parts of the block interface just once */
bdesc = mmc_get_blk_desc(mmc);
bdesc->if_type = IF_TYPE_MMC;
bdesc->removable = 1;
bdesc->devnum = mmc_get_next_devnum();
bdesc->block_read = mmc_bread;
bdesc->block_write = mmc_bwrite;
bdesc->block_erase = mmc_berase;
/* setup initial part type */
bdesc->part_type = mmc->cfg->part_type;
mmc_list_add(mmc);
#endif
upriv->mmc = mmc;
return esdhc_init_common(priv, mmc);
}
#if CONFIG_IS_ENABLED(DM_MMC)
static int fsl_esdhc_get_cd(struct udevice *dev)
{
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
return esdhc_getcd_common(priv);
}
static int fsl_esdhc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct fsl_esdhc_plat *plat = dev_get_plat(dev);
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
return esdhc_send_cmd_common(priv, &plat->mmc, cmd, data);
}
static int fsl_esdhc_set_ios(struct udevice *dev)
{
struct fsl_esdhc_plat *plat = dev_get_plat(dev);
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
return esdhc_set_ios_common(priv, &plat->mmc);
}
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
static int fsl_esdhc_set_enhanced_strobe(struct udevice *dev)
{
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
struct fsl_esdhc *regs = priv->esdhc_regs;
u32 m;
m = esdhc_read32(&regs->mixctrl);
m |= MIX_CTRL_HS400_ES;
esdhc_write32(&regs->mixctrl, m);
return 0;
}
#endif
static int fsl_esdhc_wait_dat0(struct udevice *dev, int state,
int timeout_us)
{
int ret;
u32 tmp;
struct fsl_esdhc_priv *priv = dev_get_priv(dev);
struct fsl_esdhc *regs = priv->esdhc_regs;
ret = readx_poll_timeout(esdhc_read32, &regs->prsstat, tmp,
!!(tmp & PRSSTAT_DAT0) == !!state,
timeout_us);
return ret;
}
static const struct dm_mmc_ops fsl_esdhc_ops = {
.get_cd = fsl_esdhc_get_cd,
.send_cmd = fsl_esdhc_send_cmd,
.set_ios = fsl_esdhc_set_ios,
#ifdef MMC_SUPPORTS_TUNING
.execute_tuning = fsl_esdhc_execute_tuning,
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
.set_enhanced_strobe = fsl_esdhc_set_enhanced_strobe,
#endif
.wait_dat0 = fsl_esdhc_wait_dat0,
};
#endif
static struct esdhc_soc_data usdhc_imx7d_data = {
.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
| ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
| ESDHC_FLAG_HS400,
};
static struct esdhc_soc_data usdhc_imx8qm_data = {
.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING |
ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 |
ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES,
};
static const struct udevice_id fsl_esdhc_ids[] = {
{ .compatible = "fsl,imx51-esdhc", },
{ .compatible = "fsl,imx53-esdhc", },
{ .compatible = "fsl,imx6ul-usdhc", },
{ .compatible = "fsl,imx6sx-usdhc", },
{ .compatible = "fsl,imx6sl-usdhc", },
{ .compatible = "fsl,imx6q-usdhc", },
{ .compatible = "fsl,imx7d-usdhc", .data = (ulong)&usdhc_imx7d_data,},
{ .compatible = "fsl,imx7ulp-usdhc", },
{ .compatible = "fsl,imx8qm-usdhc", .data = (ulong)&usdhc_imx8qm_data,},
{ .compatible = "fsl,imx8mm-usdhc", .data = (ulong)&usdhc_imx8qm_data,},
{ .compatible = "fsl,imx8mn-usdhc", .data = (ulong)&usdhc_imx8qm_data,},
{ .compatible = "fsl,imx8mq-usdhc", .data = (ulong)&usdhc_imx8qm_data,},
{ .compatible = "fsl,imxrt-usdhc", },
{ .compatible = "fsl,esdhc", },
{ /* sentinel */ }
};
#if CONFIG_IS_ENABLED(BLK)
static int fsl_esdhc_bind(struct udevice *dev)
{
struct fsl_esdhc_plat *plat = dev_get_plat(dev);
return mmc_bind(dev, &plat->mmc, &plat->cfg);
}
#endif
U_BOOT_DRIVER(fsl_esdhc) = {
.name = "fsl_esdhc",
.id = UCLASS_MMC,
.of_match = fsl_esdhc_ids,
.of_to_plat = fsl_esdhc_of_to_plat,
.ops = &fsl_esdhc_ops,
#if CONFIG_IS_ENABLED(BLK)
.bind = fsl_esdhc_bind,
#endif
.probe = fsl_esdhc_probe,
.plat_auto = sizeof(struct fsl_esdhc_plat),
.priv_auto = sizeof(struct fsl_esdhc_priv),
};
DM_DRIVER_ALIAS(fsl_esdhc, fsl_imx6q_usdhc)
#endif
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