diff options
Diffstat (limited to 'roms/u-boot/drivers/mmc/fsl_esdhc_imx.c')
| -rw-r--r-- | roms/u-boot/drivers/mmc/fsl_esdhc_imx.c | 1753 |
1 files changed, 1753 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/mmc/fsl_esdhc_imx.c b/roms/u-boot/drivers/mmc/fsl_esdhc_imx.c new file mode 100644 index 000000000..465d935da --- /dev/null +++ b/roms/u-boot/drivers/mmc/fsl_esdhc_imx.c @@ -0,0 +1,1753 @@ +// 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(®s->irqstat); + while (!(esdhc_read32(®s->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(®s->irqstat); + databuf = in_le32(®s->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(®s->irqstat); + while (!(esdhc_read32(®s->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(®s->irqstat); + out_le32(®s->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) + 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(®s->wml, WML_RD_WML_MASK, wml_value); +#ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO +#if defined(CONFIG_S32V234) || defined(CONFIG_IMX8) || defined(CONFIG_IMX8M) + addr = virt_to_phys((void *)(data->dest)); + if (upper_32_bits(addr)) + printf("Error found for upper 32 bits\n"); + else + esdhc_write32(®s->dsaddr, lower_32_bits(addr)); +#else + esdhc_write32(®s->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(®s->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(®s->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) + addr = virt_to_phys((void *)(data->src)); + if (upper_32_bits(addr)) + printf("Error found for upper 32 bits\n"); + else + esdhc_write32(®s->dsaddr, lower_32_bits(addr)); +#else + esdhc_write32(®s->dsaddr, (u32)data->src); +#endif +#endif + } + + esdhc_write32(®s->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(®s->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) + 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(®s->irqstat, -1); + + sync(); + + /* Wait for the bus to be idle */ + while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) || + (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB)) + ; + + while (esdhc_read32(®s->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(®s->irqsigen, 0); + + /* Send the command */ + esdhc_write32(®s->cmdarg, cmd->cmdarg); +#if defined(CONFIG_FSL_USDHC) + esdhc_write32(®s->mixctrl, + (esdhc_read32(®s->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F) + | (mmc->ddr_mode ? XFERTYP_DDREN : 0)); + esdhc_write32(®s->xfertyp, xfertyp & 0xFFFF0000); +#else + esdhc_write32(®s->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(®s->irqstat) & flags)) { + if (get_timer(start) > 1000) { + err = -ETIMEDOUT; + goto out; + } + } + + irqstat = esdhc_read32(®s->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(®s->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(®s->cmdrsp3); + cmdrsp2 = esdhc_read32(®s->cmdrsp2); + cmdrsp1 = esdhc_read32(®s->cmdrsp1); + cmdrsp0 = esdhc_read32(®s->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(®s->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(®s->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(®s->sysctl, esdhc_read32(®s->sysctl) | + SYSCTL_RSTC); + while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC) + ; + + if (data) { + esdhc_write32(®s->sysctl, + esdhc_read32(®s->sysctl) | + SYSCTL_RSTD); + while ((esdhc_read32(®s->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(®s->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(®s->vendorspec, VENDORSPEC_CKEN); +#else + esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN); +#endif + + esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk); + + ret = readx_poll_timeout(esdhc_read32, ®s->prsstat, tmp, tmp & PRSSTAT_SDSTB, 100); + if (ret) + pr_warn("fsl_esdhc_imx: Internal clock never stabilised.\n"); + +#ifdef CONFIG_FSL_USDHC + esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | VENDORSPEC_CKEN); +#else + esdhc_setbits32(®s->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(®s->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(®s->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(®s->strobe_dllctrl, val); + /* wait 1us to make sure strobe dll status register stable */ + mdelay(1); + val = esdhc_read32(®s->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(®s->mixctrl); + mixctrl &= ~(MIX_CTRL_DDREN | MIX_CTRL_HS400_EN); + + switch (mmc->selected_mode) { + case MMC_LEGACY: + esdhc_reset_tuning(mmc); + esdhc_write32(®s->mixctrl, mixctrl); + break; + case MMC_HS_400: + case MMC_HS_400_ES: + mixctrl |= MIX_CTRL_DDREN | MIX_CTRL_HS400_EN; + esdhc_write32(®s->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(®s->mixctrl, mixctrl); + break; + case UHS_DDR50: + case MMC_DDR_52: + mixctrl |= MIX_CTRL_DDREN; + esdhc_write32(®s->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(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT); + if (!(esdhc_read32(®s->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(®s->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(®s->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(®s->irqstaten); + u32 irqsigen = esdhc_read32(®s->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(®s->autoc12err); + mixctrl = esdhc_read32(®s->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(®s->autoc12err, val); + esdhc_write32(®s->mixctrl, mixctrl); + } + + /* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); */ + mixctrl = esdhc_read32(®s->mixctrl); + mixctrl = MIX_CTRL_DTDSEL_READ | (mixctrl & ~MIX_CTRL_SDHCI_MASK); + esdhc_write32(®s->mixctrl, mixctrl); + + esdhc_write32(®s->irqstaten, IRQSTATEN_BRR); + esdhc_write32(®s->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(®s->blkattr, 0x7080); + else if (mmc->bus_width == 4) + esdhc_write32(®s->blkattr, 0x7040); + } else { + esdhc_write32(®s->blkattr, 0x7040); + } + + /* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE) */ + val = esdhc_read32(®s->mixctrl); + val = MIX_CTRL_DTDSEL_READ | (val & ~MIX_CTRL_SDHCI_MASK); + esdhc_write32(®s->mixctrl, val); + + /* We are using STD tuning, no need to check return value */ + mmc_send_tuning(mmc, opcode, NULL); + + ctrl = esdhc_read32(®s->autoc12err); + if ((!(ctrl & MIX_CTRL_EXE_TUNE)) && + (ctrl & MIX_CTRL_SMPCLK_SEL)) { + ret = 0; + break; + } + } + + esdhc_write32(®s->irqstaten, irqstaten); + esdhc_write32(®s->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(®s->vendorspec, VENDORSPEC_CKEN); +#else + esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN); +#endif + } else { +#ifdef CONFIG_FSL_USDHC + esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | + VENDORSPEC_CKEN); +#else + esdhc_setbits32(®s->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(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8); + + if (mmc->bus_width == 4) + esdhc_setbits32(®s->proctl, PROCTL_DTW_4); + else if (mmc->bus_width == 8) + esdhc_setbits32(®s->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(®s->sysctl, SYSCTL_RSTA); + + /* Wait until the controller is available */ + start = get_timer(0); + while ((esdhc_read32(®s->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(®s->mmcboot, 0x0); + /* Reset MIX_CTRL and CLK_TUNE_CTRL_STATUS regs to 0 */ + esdhc_write32(®s->mixctrl, 0x0); + esdhc_write32(®s->clktunectrlstatus, 0x0); + + /* Put VEND_SPEC to default value */ + if (priv->vs18_enable) + esdhc_write32(®s->vendorspec, (VENDORSPEC_INIT | + ESDHC_VENDORSPEC_VSELECT)); + else + esdhc_write32(®s->vendorspec, VENDORSPEC_INIT); + + /* Disable DLL_CTRL delay line */ + esdhc_write32(®s->dllctrl, 0x0); +#endif + +#ifndef ARCH_MXC + /* Enable cache snooping */ + esdhc_write32(®s->scr, 0x00000040); +#endif + +#ifndef CONFIG_FSL_USDHC + esdhc_setbits32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN); +#else + esdhc_setbits32(®s->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(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR); + +#ifdef CONFIG_MCF5441x + esdhc_write32(®s->proctl, PROCTL_INIT | PROCTL_D3CD); +#else + /* Put the PROCTL reg back to the default */ + esdhc_write32(®s->proctl, PROCTL_INIT); +#endif + + /* Set timout to the maximum value */ + esdhc_clrsetbits32(®s->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(®s->prsstat) & PRSSTAT_CINS) && --timeout) + udelay(1000); + + return timeout > 0; +} + +static int esdhc_reset(struct fsl_esdhc *regs) +{ + ulong start; + + /* reset the controller */ + esdhc_setbits32(®s->sysctl, SYSCTL_RSTA); + + /* hardware clears the bit when it is done */ + start = get_timer(0); + while ((esdhc_read32(®s->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(®s->proctl, PROCTL_INIT | PROCTL_D3CD); +#endif + +#ifndef CONFIG_FSL_USDHC + esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN + | SYSCTL_IPGEN | SYSCTL_CKEN); + /* Clearing tuning bits in case ROM has set it already */ + esdhc_write32(®s->mixctrl, 0); + esdhc_write32(®s->autoc12err, 0); + esdhc_write32(®s->clktunectrlstatus, 0); +#else + esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | + VENDORSPEC_HCKEN | VENDORSPEC_IPGEN | VENDORSPEC_CKEN); +#endif + + if (priv->vs18_enable) + esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT); + + esdhc_write32(®s->irqstaten, SDHCI_IRQ_EN_BITS); + cfg = &plat->cfg; +#ifndef CONFIG_DM_MMC + memset(cfg, '\0', sizeof(*cfg)); +#endif + + voltage_caps = 0; + caps = esdhc_read32(®s->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(®s->dllctrl, 0); + if (priv->flags & ESDHC_FLAG_USDHC) { + if (priv->flags & ESDHC_FLAG_STD_TUNING) { + u32 val = esdhc_read32(®s->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(®s->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(®s->mixctrl); + m |= MIX_CTRL_HS400_ES; + esdhc_write32(®s->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, ®s->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 |