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mmc: Add MMC support for stm32h7 Socs

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This patch adds SD/MMC support for STM32H7 SoCs.

Here is an extraction of SDMMC main features, embedded in
STM32H7 SoCs.
The SD/MMC block include the following:
 _ Full compliance with MultiMediaCard System Specification
   Version 4.51. Card support for three different databus modes:
   1-bit (default), 4-bit and 8-bit.
 _ Full compatibility with previous versions of MultiMediaCards
   (backward compatibility).
 _ Full compliance with SD memory card specifications version 4.1.
   (SDR104 SDMMC_CK speed limited to maximum allowed IO speed,
    SPI mode and UHS-II mode not supported).
 _ Full compliance with SDIO card specification version 4.0.
   Card support for two different databus modes: 1-bit (default)
   and 4-bit. (SDR104 SDMMC_CK speed limited to maximum allowed IO
   speed, SPI mode and UHS-II mode not supported).
 _ Data transfer up to 208 Mbyte/s for the 8 bit mode.
   (depending maximum allowed IO speed).
 _ Data and command output enable signals to control external
   bidirectional drivers.

The current version of the SDMMC supports only one SD/SDIO/MMC card
at any one time and a stack of MMC Version 4.51 or previous.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
master
Patrice Chotard 8 years ago committed by Jaehoon Chung
parent 6e9b109aa9
commit b312c590bc
3 changed files with 617 additions and 0 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 8
      drivers/mmc/Kconfig
  2. 1
      drivers/mmc/Makefile
  3. 608
      drivers/mmc/stm32_sdmmc2.c

8
drivers/mmc/Kconfig
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@ -384,6 +384,14 @@ config GENERIC_ATMEL_MCI
the SD Memory Card Specification V2.0, the SDIO V2.0 specification
and CE-ATA V1.1.
config STM32_SDMMC2
bool "STMicroelectronics STM32H7 SD/MMC Host Controller support"
depends on DM_MMC && BLK && OF_CONTROL && DM_MMC_OPS
help
This selects support for the SD/MMC controller on STM32H7 SoCs.
If you have a board based on such a SoC and with a SD/MMC slot,
say Y or M here.
endif
config TEGRA124_MMC_DISABLE_EXT_LOOPBACK

1
drivers/mmc/Makefile
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@ -43,6 +43,7 @@ obj-$(CONFIG_SUPPORT_EMMC_RPMB) += rpmb.o
obj-$(CONFIG_MMC_SANDBOX) += sandbox_mmc.o
obj-$(CONFIG_SH_MMCIF) += sh_mmcif.o
obj-$(CONFIG_SH_SDHI) += sh_sdhi.o
obj-$(CONFIG_STM32_SDMMC2) += stm32_sdmmc2.o
# SDHCI
obj-$(CONFIG_MMC_SDHCI) += sdhci.o

608
drivers/mmc/stm32_sdmmc2.c
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@ -0,0 +1,608 @@
/*
* Copyright (C) STMicroelectronics SA 2017
* Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <mmc.h>
#include <reset.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <linux/iopoll.h>
struct stm32_sdmmc2_plat {
struct mmc_config cfg;
struct mmc mmc;
};
struct stm32_sdmmc2_priv {
fdt_addr_t base;
struct clk clk;
struct reset_ctl reset_ctl;
struct gpio_desc cd_gpio;
u32 clk_reg_msk;
u32 pwr_reg_msk;
};
struct stm32_sdmmc2_ctx {
u32 cache_start;
u32 cache_end;
u32 data_length;
bool dpsm_abort;
};
/* SDMMC REGISTERS OFFSET */
#define SDMMC_POWER 0x00 /* SDMMC power control */
#define SDMMC_CLKCR 0x04 /* SDMMC clock control */
#define SDMMC_ARG 0x08 /* SDMMC argument */
#define SDMMC_CMD 0x0C /* SDMMC command */
#define SDMMC_RESP1 0x14 /* SDMMC response 1 */
#define SDMMC_RESP2 0x18 /* SDMMC response 2 */
#define SDMMC_RESP3 0x1C /* SDMMC response 3 */
#define SDMMC_RESP4 0x20 /* SDMMC response 4 */
#define SDMMC_DTIMER 0x24 /* SDMMC data timer */
#define SDMMC_DLEN 0x28 /* SDMMC data length */
#define SDMMC_DCTRL 0x2C /* SDMMC data control */
#define SDMMC_DCOUNT 0x30 /* SDMMC data counter */
#define SDMMC_STA 0x34 /* SDMMC status */
#define SDMMC_ICR 0x38 /* SDMMC interrupt clear */
#define SDMMC_MASK 0x3C /* SDMMC mask */
#define SDMMC_IDMACTRL 0x50 /* SDMMC DMA control */
#define SDMMC_IDMABASE0 0x58 /* SDMMC DMA buffer 0 base address */
/* SDMMC_POWER register */
#define SDMMC_POWER_PWRCTRL GENMASK(1, 0)
#define SDMMC_POWER_VSWITCH BIT(2)
#define SDMMC_POWER_VSWITCHEN BIT(3)
#define SDMMC_POWER_DIRPOL BIT(4)
/* SDMMC_CLKCR register */
#define SDMMC_CLKCR_CLKDIV GENMASK(9, 0)
#define SDMMC_CLKCR_CLKDIV_MAX SDMMC_CLKCR_CLKDIV
#define SDMMC_CLKCR_PWRSAV BIT(12)
#define SDMMC_CLKCR_WIDBUS_4 BIT(14)
#define SDMMC_CLKCR_WIDBUS_8 BIT(15)
#define SDMMC_CLKCR_NEGEDGE BIT(16)
#define SDMMC_CLKCR_HWFC_EN BIT(17)
#define SDMMC_CLKCR_DDR BIT(18)
#define SDMMC_CLKCR_BUSSPEED BIT(19)
#define SDMMC_CLKCR_SELCLKRX GENMASK(21, 20)
/* SDMMC_CMD register */
#define SDMMC_CMD_CMDINDEX GENMASK(5, 0)
#define SDMMC_CMD_CMDTRANS BIT(6)
#define SDMMC_CMD_CMDSTOP BIT(7)
#define SDMMC_CMD_WAITRESP GENMASK(9, 8)
#define SDMMC_CMD_WAITRESP_0 BIT(8)
#define SDMMC_CMD_WAITRESP_1 BIT(9)
#define SDMMC_CMD_WAITINT BIT(10)
#define SDMMC_CMD_WAITPEND BIT(11)
#define SDMMC_CMD_CPSMEN BIT(12)
#define SDMMC_CMD_DTHOLD BIT(13)
#define SDMMC_CMD_BOOTMODE BIT(14)
#define SDMMC_CMD_BOOTEN BIT(15)
#define SDMMC_CMD_CMDSUSPEND BIT(16)
/* SDMMC_DCTRL register */
#define SDMMC_DCTRL_DTEN BIT(0)
#define SDMMC_DCTRL_DTDIR BIT(1)
#define SDMMC_DCTRL_DTMODE GENMASK(3, 2)
#define SDMMC_DCTRL_DBLOCKSIZE GENMASK(7, 4)
#define SDMMC_DCTRL_DBLOCKSIZE_SHIFT 4
#define SDMMC_DCTRL_RWSTART BIT(8)
#define SDMMC_DCTRL_RWSTOP BIT(9)
#define SDMMC_DCTRL_RWMOD BIT(10)
#define SDMMC_DCTRL_SDMMCEN BIT(11)
#define SDMMC_DCTRL_BOOTACKEN BIT(12)
#define SDMMC_DCTRL_FIFORST BIT(13)
/* SDMMC_STA register */
#define SDMMC_STA_CCRCFAIL BIT(0)
#define SDMMC_STA_DCRCFAIL BIT(1)
#define SDMMC_STA_CTIMEOUT BIT(2)
#define SDMMC_STA_DTIMEOUT BIT(3)
#define SDMMC_STA_TXUNDERR BIT(4)
#define SDMMC_STA_RXOVERR BIT(5)
#define SDMMC_STA_CMDREND BIT(6)
#define SDMMC_STA_CMDSENT BIT(7)
#define SDMMC_STA_DATAEND BIT(8)
#define SDMMC_STA_DHOLD BIT(9)
#define SDMMC_STA_DBCKEND BIT(10)
#define SDMMC_STA_DABORT BIT(11)
#define SDMMC_STA_DPSMACT BIT(12)
#define SDMMC_STA_CPSMACT BIT(13)
#define SDMMC_STA_TXFIFOHE BIT(14)
#define SDMMC_STA_RXFIFOHF BIT(15)
#define SDMMC_STA_TXFIFOF BIT(16)
#define SDMMC_STA_RXFIFOF BIT(17)
#define SDMMC_STA_TXFIFOE BIT(18)
#define SDMMC_STA_RXFIFOE BIT(19)
#define SDMMC_STA_BUSYD0 BIT(20)
#define SDMMC_STA_BUSYD0END BIT(21)
#define SDMMC_STA_SDMMCIT BIT(22)
#define SDMMC_STA_ACKFAIL BIT(23)
#define SDMMC_STA_ACKTIMEOUT BIT(24)
#define SDMMC_STA_VSWEND BIT(25)
#define SDMMC_STA_CKSTOP BIT(26)
#define SDMMC_STA_IDMATE BIT(27)
#define SDMMC_STA_IDMABTC BIT(28)
/* SDMMC_ICR register */
#define SDMMC_ICR_CCRCFAILC BIT(0)
#define SDMMC_ICR_DCRCFAILC BIT(1)
#define SDMMC_ICR_CTIMEOUTC BIT(2)
#define SDMMC_ICR_DTIMEOUTC BIT(3)
#define SDMMC_ICR_TXUNDERRC BIT(4)
#define SDMMC_ICR_RXOVERRC BIT(5)
#define SDMMC_ICR_CMDRENDC BIT(6)
#define SDMMC_ICR_CMDSENTC BIT(7)
#define SDMMC_ICR_DATAENDC BIT(8)
#define SDMMC_ICR_DHOLDC BIT(9)
#define SDMMC_ICR_DBCKENDC BIT(10)
#define SDMMC_ICR_DABORTC BIT(11)
#define SDMMC_ICR_BUSYD0ENDC BIT(21)
#define SDMMC_ICR_SDMMCITC BIT(22)
#define SDMMC_ICR_ACKFAILC BIT(23)
#define SDMMC_ICR_ACKTIMEOUTC BIT(24)
#define SDMMC_ICR_VSWENDC BIT(25)
#define SDMMC_ICR_CKSTOPC BIT(26)
#define SDMMC_ICR_IDMATEC BIT(27)
#define SDMMC_ICR_IDMABTCC BIT(28)
#define SDMMC_ICR_STATIC_FLAGS ((GENMASK(28, 21)) | (GENMASK(11, 0)))
/* SDMMC_MASK register */
#define SDMMC_MASK_CCRCFAILIE BIT(0)
#define SDMMC_MASK_DCRCFAILIE BIT(1)
#define SDMMC_MASK_CTIMEOUTIE BIT(2)
#define SDMMC_MASK_DTIMEOUTIE BIT(3)
#define SDMMC_MASK_TXUNDERRIE BIT(4)
#define SDMMC_MASK_RXOVERRIE BIT(5)
#define SDMMC_MASK_CMDRENDIE BIT(6)
#define SDMMC_MASK_CMDSENTIE BIT(7)
#define SDMMC_MASK_DATAENDIE BIT(8)
#define SDMMC_MASK_DHOLDIE BIT(9)
#define SDMMC_MASK_DBCKENDIE BIT(10)
#define SDMMC_MASK_DABORTIE BIT(11)
#define SDMMC_MASK_TXFIFOHEIE BIT(14)
#define SDMMC_MASK_RXFIFOHFIE BIT(15)
#define SDMMC_MASK_RXFIFOFIE BIT(17)
#define SDMMC_MASK_TXFIFOEIE BIT(18)
#define SDMMC_MASK_BUSYD0ENDIE BIT(21)
#define SDMMC_MASK_SDMMCITIE BIT(22)
#define SDMMC_MASK_ACKFAILIE BIT(23)
#define SDMMC_MASK_ACKTIMEOUTIE BIT(24)
#define SDMMC_MASK_VSWENDIE BIT(25)
#define SDMMC_MASK_CKSTOPIE BIT(26)
#define SDMMC_MASK_IDMABTCIE BIT(28)
/* SDMMC_IDMACTRL register */
#define SDMMC_IDMACTRL_IDMAEN BIT(0)
#define SDMMC_CMD_TIMEOUT 0xFFFFFFFF
DECLARE_GLOBAL_DATA_PTR;
static void stm32_sdmmc2_start_data(struct stm32_sdmmc2_priv *priv,
struct mmc_data *data,
struct stm32_sdmmc2_ctx *ctx)
{
u32 data_ctrl, idmabase0;
/* Configure the SDMMC DPSM (Data Path State Machine) */
data_ctrl = (__ilog2(data->blocksize) <<
SDMMC_DCTRL_DBLOCKSIZE_SHIFT) &
SDMMC_DCTRL_DBLOCKSIZE;
if (data->flags & MMC_DATA_READ) {
data_ctrl |= SDMMC_DCTRL_DTDIR;
idmabase0 = (u32)data->dest;
} else {
idmabase0 = (u32)data->src;
}
/* Set the SDMMC Data TimeOut value */
writel(SDMMC_CMD_TIMEOUT, priv->base + SDMMC_DTIMER);
/* Set the SDMMC DataLength value */
writel(ctx->data_length, priv->base + SDMMC_DLEN);
/* Write to SDMMC DCTRL */
writel(data_ctrl, priv->base + SDMMC_DCTRL);
/* Cache align */
ctx->cache_start = rounddown(idmabase0, ARCH_DMA_MINALIGN);
ctx->cache_end = roundup(idmabase0 + ctx->data_length,
ARCH_DMA_MINALIGN);
/*
* Flush data cache before DMA start (clean and invalidate)
* Clean also needed for read
* Avoid issue on buffer not cached-aligned
*/
flush_dcache_range(ctx->cache_start, ctx->cache_end);
/* Enable internal DMA */
writel(idmabase0, priv->base + SDMMC_IDMABASE0);
writel(SDMMC_IDMACTRL_IDMAEN, priv->base + SDMMC_IDMACTRL);
}
static void stm32_sdmmc2_start_cmd(struct stm32_sdmmc2_priv *priv,
struct mmc_cmd *cmd, u32 cmd_param)
{
if (readl(priv->base + SDMMC_ARG) & SDMMC_CMD_CPSMEN)
writel(0, priv->base + SDMMC_ARG);
cmd_param |= cmd->cmdidx | SDMMC_CMD_CPSMEN;
if (cmd->resp_type & MMC_RSP_PRESENT) {
if (cmd->resp_type & MMC_RSP_136)
cmd_param |= SDMMC_CMD_WAITRESP;
else if (cmd->resp_type & MMC_RSP_CRC)
cmd_param |= SDMMC_CMD_WAITRESP_0;
else
cmd_param |= SDMMC_CMD_WAITRESP_1;
}
/* Clear flags */
writel(SDMMC_ICR_STATIC_FLAGS, priv->base + SDMMC_ICR);
/* Set SDMMC argument value */
writel(cmd->cmdarg, priv->base + SDMMC_ARG);
/* Set SDMMC command parameters */
writel(cmd_param, priv->base + SDMMC_CMD);
}
static int stm32_sdmmc2_end_cmd(struct stm32_sdmmc2_priv *priv,
struct mmc_cmd *cmd,
struct stm32_sdmmc2_ctx *ctx)
{
u32 mask = SDMMC_STA_CTIMEOUT;
u32 status;
int ret;
if (cmd->resp_type & MMC_RSP_PRESENT) {
mask |= SDMMC_STA_CMDREND;
if (cmd->resp_type & MMC_RSP_CRC)
mask |= SDMMC_STA_CCRCFAIL;
} else {
mask |= SDMMC_STA_CMDSENT;
}
/* Polling status register */
ret = readl_poll_timeout(priv->base + SDMMC_STA, status, status & mask,
300);
if (ret < 0) {
debug("%s: timeout reading SDMMC_STA register\n", __func__);
ctx->dpsm_abort = true;
return ret;
}
/* Check status */
if (status & SDMMC_STA_CTIMEOUT) {
debug("%s: error SDMMC_STA_CTIMEOUT (0x%x) for cmd %d\n",
__func__, status, cmd->cmdidx);
ctx->dpsm_abort = true;
return -ETIMEDOUT;
}
if (status & SDMMC_STA_CCRCFAIL && cmd->resp_type & MMC_RSP_CRC) {
debug("%s: error SDMMC_STA_CCRCFAIL (0x%x) for cmd %d\n",
__func__, status, cmd->cmdidx);
ctx->dpsm_abort = true;
return -EILSEQ;
}
if (status & SDMMC_STA_CMDREND && cmd->resp_type & MMC_RSP_PRESENT) {
cmd->response[0] = readl(priv->base + SDMMC_RESP1);
if (cmd->resp_type & MMC_RSP_136) {
cmd->response[1] = readl(priv->base + SDMMC_RESP2);
cmd->response[2] = readl(priv->base + SDMMC_RESP3);
cmd->response[3] = readl(priv->base + SDMMC_RESP4);
}
}
return 0;
}
static int stm32_sdmmc2_end_data(struct stm32_sdmmc2_priv *priv,
struct mmc_cmd *cmd,
struct mmc_data *data,
struct stm32_sdmmc2_ctx *ctx)
{
u32 mask = SDMMC_STA_DCRCFAIL | SDMMC_STA_DTIMEOUT |
SDMMC_STA_IDMATE | SDMMC_STA_DATAEND;
u32 status;
if (data->flags & MMC_DATA_READ)
mask |= SDMMC_STA_RXOVERR;
else
mask |= SDMMC_STA_TXUNDERR;
status = readl(priv->base + SDMMC_STA);
while (!(status & mask))
status = readl(priv->base + SDMMC_STA);
/*
* Need invalidate the dcache again to avoid any
* cache-refill during the DMA operations (pre-fetching)
*/
if (data->flags & MMC_DATA_READ)
invalidate_dcache_range(ctx->cache_start, ctx->cache_end);
if (status & SDMMC_STA_DCRCFAIL) {
debug("%s: error SDMMC_STA_DCRCFAIL (0x%x) for cmd %d\n",
__func__, status, cmd->cmdidx);
if (readl(priv->base + SDMMC_DCOUNT))
ctx->dpsm_abort = true;
return -EILSEQ;
}
if (status & SDMMC_STA_DTIMEOUT) {
debug("%s: error SDMMC_STA_DTIMEOUT (0x%x) for cmd %d\n",
__func__, status, cmd->cmdidx);
ctx->dpsm_abort = true;
return -ETIMEDOUT;
}
if (status & SDMMC_STA_TXUNDERR) {
debug("%s: error SDMMC_STA_TXUNDERR (0x%x) for cmd %d\n",
__func__, status, cmd->cmdidx);
ctx->dpsm_abort = true;
return -EIO;
}
if (status & SDMMC_STA_RXOVERR) {
debug("%s: error SDMMC_STA_RXOVERR (0x%x) for cmd %d\n",
__func__, status, cmd->cmdidx);
ctx->dpsm_abort = true;
return -EIO;
}
if (status & SDMMC_STA_IDMATE) {
debug("%s: error SDMMC_STA_IDMATE (0x%x) for cmd %d\n",
__func__, status, cmd->cmdidx);
ctx->dpsm_abort = true;
return -EIO;
}
return 0;
}
static int stm32_sdmmc2_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct stm32_sdmmc2_priv *priv = dev_get_priv(dev);
struct stm32_sdmmc2_ctx ctx;
u32 cmdat = data ? SDMMC_CMD_CMDTRANS : 0;
int ret, retry = 3;
retry_cmd:
ctx.data_length = 0;
ctx.dpsm_abort = false;
if (data) {
ctx.data_length = data->blocks * data->blocksize;
stm32_sdmmc2_start_data(priv, data, &ctx);
}
stm32_sdmmc2_start_cmd(priv, cmd, cmdat);
debug("%s: send cmd %d data: 0x%x @ 0x%x\n",
__func__, cmd->cmdidx,
data ? ctx.data_length : 0, (unsigned int)data);
ret = stm32_sdmmc2_end_cmd(priv, cmd, &ctx);
if (data && !ret)
ret = stm32_sdmmc2_end_data(priv, cmd, data, &ctx);
/* Clear flags */
writel(SDMMC_ICR_STATIC_FLAGS, priv->base + SDMMC_ICR);
if (data)
writel(0x0, priv->base + SDMMC_IDMACTRL);
/*
* To stop Data Path State Machine, a stop_transmission command
* shall be send on cmd or data errors.
*/
if (ctx.dpsm_abort && (cmd->cmdidx != MMC_CMD_STOP_TRANSMISSION)) {
struct mmc_cmd stop_cmd;
stop_cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
stop_cmd.cmdarg = 0;
stop_cmd.resp_type = MMC_RSP_R1b;
debug("%s: send STOP command to abort dpsm treatments\n",
__func__);
stm32_sdmmc2_start_cmd(priv, &stop_cmd, SDMMC_CMD_CMDSTOP);
stm32_sdmmc2_end_cmd(priv, &stop_cmd, &ctx);
writel(SDMMC_ICR_STATIC_FLAGS, priv->base + SDMMC_ICR);
}
if ((ret != -ETIMEDOUT) && (ret != 0) && retry) {
printf("%s: cmd %d failed, retrying ...\n",
__func__, cmd->cmdidx);
retry--;
goto retry_cmd;
}
debug("%s: end for CMD %d, ret = %d\n", __func__, cmd->cmdidx, ret);
return ret;
}
static void stm32_sdmmc2_pwron(struct stm32_sdmmc2_priv *priv)
{
/* Reset */
reset_assert(&priv->reset_ctl);
udelay(2);
reset_deassert(&priv->reset_ctl);
udelay(1000);
/* Set Power State to ON */
writel(SDMMC_POWER_PWRCTRL | priv->pwr_reg_msk, priv->base + SDMMC_POWER);
/*
* 1ms: required power up waiting time before starting the
* SD initialization sequence
*/
udelay(1000);
}
#define IS_RISING_EDGE(reg) (reg & SDMMC_CLKCR_NEGEDGE ? 0 : 1)
static int stm32_sdmmc2_set_ios(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
struct stm32_sdmmc2_priv *priv = dev_get_priv(dev);
struct stm32_sdmmc2_plat *plat = dev_get_platdata(dev);
struct mmc_config *cfg = &plat->cfg;
u32 desired = mmc->clock;
u32 sys_clock = clk_get_rate(&priv->clk);
u32 clk = 0;
debug("%s: bus_with = %d, clock = %d\n", __func__,
mmc->bus_width, mmc->clock);
if ((mmc->bus_width == 1) && (desired == cfg->f_min))
stm32_sdmmc2_pwron(priv);
/*
* clk_div = 0 => command and data generated on SDMMCCLK falling edge
* clk_div > 0 and NEGEDGE = 0 => command and data generated on
* SDMMCCLK rising edge
* clk_div > 0 and NEGEDGE = 1 => command and data generated on
* SDMMCCLK falling edge
*/
if (desired && ((sys_clock > desired) ||
IS_RISING_EDGE(priv->clk_reg_msk))) {
clk = DIV_ROUND_UP(sys_clock, 2 * desired);
if (clk > SDMMC_CLKCR_CLKDIV_MAX)
clk = SDMMC_CLKCR_CLKDIV_MAX;
}
if (mmc->bus_width == 4)
clk |= SDMMC_CLKCR_WIDBUS_4;
if (mmc->bus_width == 8)
clk |= SDMMC_CLKCR_WIDBUS_8;
writel(clk | priv->clk_reg_msk, priv->base + SDMMC_CLKCR);
return 0;
}
static int stm32_sdmmc2_getcd(struct udevice *dev)
{
struct stm32_sdmmc2_priv *priv = dev_get_priv(dev);
debug("stm32_sdmmc2_getcd called\n");
if (dm_gpio_is_valid(&priv->cd_gpio))
return dm_gpio_get_value(&priv->cd_gpio);
return 1;
}
static const struct dm_mmc_ops stm32_sdmmc2_ops = {
.send_cmd = stm32_sdmmc2_send_cmd,
.set_ios = stm32_sdmmc2_set_ios,
.get_cd = stm32_sdmmc2_getcd,
};
static int stm32_sdmmc2_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct stm32_sdmmc2_plat *plat = dev_get_platdata(dev);
struct stm32_sdmmc2_priv *priv = dev_get_priv(dev);
struct mmc_config *cfg = &plat->cfg;
int ret;
priv->base = dev_read_addr(dev);
if (priv->base == FDT_ADDR_T_NONE)
return -EINVAL;
if (dev_read_bool(dev, "st,negedge"))
priv->clk_reg_msk |= SDMMC_CLKCR_NEGEDGE;
if (dev_read_bool(dev, "st,dirpol"))
priv->pwr_reg_msk |= SDMMC_POWER_DIRPOL;
ret = clk_get_by_index(dev, 0, &priv->clk);
if (ret)
return ret;
ret = clk_enable(&priv->clk);
if (ret)
goto clk_free;
ret = reset_get_by_index(dev, 0, &priv->reset_ctl);
if (ret)
goto clk_disable;
gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
GPIOD_IS_IN);
cfg->f_min = 400000;
cfg->f_max = dev_read_u32_default(dev, "max-frequency", 52000000);
cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
cfg->name = "STM32 SDMMC2";
cfg->host_caps = 0;
if (cfg->f_max > 25000000)
cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
switch (dev_read_u32_default(dev, "bus-width", 1)) {
case 8:
cfg->host_caps |= MMC_MODE_8BIT;
case 4:
cfg->host_caps |= MMC_MODE_4BIT;
break;
case 1:
break;
default:
error("invalid \"bus-width\" property, force to 1\n");
}
upriv->mmc = &plat->mmc;
return 0;
clk_disable:
clk_disable(&priv->clk);
clk_free:
clk_free(&priv->clk);
return ret;
}
int stm32_sdmmc_bind(struct udevice *dev)
{
struct stm32_sdmmc2_plat *plat = dev_get_platdata(dev);
return mmc_bind(dev, &plat->mmc, &plat->cfg);
}
static const struct udevice_id stm32_sdmmc2_ids[] = {
{ .compatible = "st,stm32-sdmmc2" },
{ }
};
U_BOOT_DRIVER(stm32_sdmmc2) = {
.name = "stm32_sdmmc2",
.id = UCLASS_MMC,
.of_match = stm32_sdmmc2_ids,
.ops = &stm32_sdmmc2_ops,
.probe = stm32_sdmmc2_probe,
.bind = stm32_sdmmc_bind,
.priv_auto_alloc_size = sizeof(struct stm32_sdmmc2_priv),
.platdata_auto_alloc_size = sizeof(struct stm32_sdmmc2_plat),
};
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