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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
- * Copyright 2019 NXP Semiconductors
- * 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 <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
- 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
- * @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;
- #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)
- ;
- /* Wait at least 8 SD clock cycles before the next command */
- /*
- * Note: This is way more than 8 cycles, but 1ms seems to
- * resolve timing issues with some cards
- */
- udelay(1000);
- /* 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;
- }
- /* Switch voltage to 1.8V if CMD11 succeeded */
- if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V) {
- esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT);
- printf("Run CMD11 1.8V switch\n");
- /* Sleep for 5 ms - max time for card to switch to 1.8V */
- udelay(5000);
- }
- /* 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) {
- writel(ESDHC_STROBE_DLL_CTRL_RESET, ®s->strobe_dllctrl);
- /*
- * 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);
- writel(val, ®s->strobe_dllctrl);
- /* wait 1us to make sure strobe dll status register stable */
- mdelay(1);
- val = readl(®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 = readl(®s->mixctrl);
- mixctrl &= ~(MIX_CTRL_DDREN | MIX_CTRL_HS400_EN);
- switch (mmc->selected_mode) {
- case MMC_LEGACY:
- esdhc_reset_tuning(mmc);
- writel(mixctrl, ®s->mixctrl);
- break;
- case MMC_HS_400:
- case MMC_HS_400_ES:
- mixctrl |= MIX_CTRL_DDREN | MIX_CTRL_HS400_EN;
- writel(mixctrl, ®s->mixctrl);
- esdhc_set_strobe_dll(mmc);
- 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:
- writel(mixctrl, ®s->mixctrl);
- break;
- case UHS_DDR50:
- case MMC_DDR_52:
- mixctrl |= MIX_CTRL_DDREN;
- writel(mixctrl, ®s->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;
- int ret;
- 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);
- 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;
- dm_mmc_send_cmd(mmc->dev, &cmd, NULL);
- }
- static int fsl_esdhc_execute_tuning(struct udevice *dev, uint32_t opcode)
- {
- struct fsl_esdhc_plat *plat = dev_get_platdata(dev);
- struct fsl_esdhc_priv *priv = dev_get_priv(dev);
- struct fsl_esdhc *regs = priv->esdhc_regs;
- struct mmc *mmc = &plat->mmc;
- u32 irqstaten = readl(®s->irqstaten);
- u32 irqsigen = readl(®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 = readl(®s->autoc12err);
- mixctrl = readl(®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;
- writel(val, ®s->autoc12err);
- writel(mixctrl, ®s->mixctrl);
- }
- /* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); */
- mixctrl = readl(®s->mixctrl);
- mixctrl = MIX_CTRL_DTDSEL_READ | (mixctrl & ~MIX_CTRL_SDHCI_MASK);
- writel(mixctrl, ®s->mixctrl);
- writel(IRQSTATEN_BRR, ®s->irqstaten);
- writel(IRQSTATEN_BRR, ®s->irqsigen);
- /*
- * 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)
- writel(0x7080, ®s->blkattr);
- else if (mmc->bus_width == 4)
- writel(0x7040, ®s->blkattr);
- } else {
- writel(0x7040, ®s->blkattr);
- }
- /* sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE) */
- val = readl(®s->mixctrl);
- val = MIX_CTRL_DTDSEL_READ | (val & ~MIX_CTRL_SDHCI_MASK);
- writel(val, ®s->mixctrl);
- /* We are using STD tuning, no need to check return value */
- mmc_send_tuning(mmc, opcode, NULL);
- ctrl = readl(®s->autoc12err);
- if ((!(ctrl & MIX_CTRL_EXE_TUNE)) &&
- (ctrl & MIX_CTRL_SMPCLK_SEL)) {
- ret = 0;
- break;
- }
- }
- writel(irqstaten, ®s->irqstaten);
- writel(irqsigen, ®s->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;
- /* 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
- }
- if (priv->mode != mmc->selected_mode) {
- ret = esdhc_set_timing(mmc);
- if (ret) {
- printf("esdhc_set_timing error %d\n", ret);
- return ret;
- }
- }
- 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);
- writel(SDHCI_IRQ_EN_BITS, ®s->irqstaten);
- 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
- /* T4240 host controller capabilities register should have VS33 bit */
- #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33
- caps = caps | ESDHC_HOSTCAPBLT_VS33;
- #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;
- writel(0, ®s->dllctrl);
- if (priv->flags & ESDHC_FLAG_USDHC) {
- if (priv->flags & ESDHC_FLAG_STD_TUNING) {
- u32 val = readl(®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;
- writel(val, ®s->tuning_ctrl);
- }
- }
- 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_ofdata_to_platdata(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;
- 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_platdata(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;
- struct driver_info *info;
- info = (struct driver_info *)dtplat->cd_gpios->node;
- ret = device_get_by_driver_info(info, &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);
- #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);
- 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_platdata(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_platdata(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 = readl(®s->mixctrl);
- m |= MIX_CTRL_HS400_ES;
- writel(m, ®s->mixctrl);
- return 0;
- }
- #endif
- 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
- };
- #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,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_platdata(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,
- .ofdata_to_platdata = fsl_esdhc_ofdata_to_platdata,
- .ops = &fsl_esdhc_ops,
- #if CONFIG_IS_ENABLED(BLK)
- .bind = fsl_esdhc_bind,
- #endif
- .probe = fsl_esdhc_probe,
- .platdata_auto_alloc_size = sizeof(struct fsl_esdhc_plat),
- .priv_auto_alloc_size = sizeof(struct fsl_esdhc_priv),
- };
- U_BOOT_DRIVER_ALIAS(fsl_esdhc, fsl_imx6q_usdhc)
- #endif
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