diff options
Diffstat (limited to 'drivers/mmc/am654_sdhci.c')
| -rw-r--r-- | drivers/mmc/am654_sdhci.c | 825 |
1 files changed, 825 insertions, 0 deletions
diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c new file mode 100644 index 00000000000..b4c60a48d2e --- /dev/null +++ b/drivers/mmc/am654_sdhci.c @@ -0,0 +1,825 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ + * + * Texas Instruments' K3 SD Host Controller Interface + */ + +#include <clk.h> +#include <dm.h> +#include <malloc.h> +#include <mmc.h> +#include <power-domain.h> +#include <regmap.h> +#include <sdhci.h> +#include <soc.h> +#include <dm/device_compat.h> +#include <linux/bitops.h> +#include <linux/err.h> + +/* CTL_CFG Registers */ +#define CTL_CFG_2 0x14 + +#define SLOTTYPE_MASK GENMASK(31, 30) +#define SLOTTYPE_EMBEDDED BIT(30) + +/* PHY Registers */ +#define PHY_CTRL1 0x100 +#define PHY_CTRL2 0x104 +#define PHY_CTRL3 0x108 +#define PHY_CTRL4 0x10C +#define PHY_CTRL5 0x110 +#define PHY_CTRL6 0x114 +#define PHY_STAT1 0x130 +#define PHY_STAT2 0x134 + +#define IOMUX_ENABLE_SHIFT 31 +#define IOMUX_ENABLE_MASK BIT(IOMUX_ENABLE_SHIFT) +#define OTAPDLYENA_SHIFT 20 +#define OTAPDLYENA_MASK BIT(OTAPDLYENA_SHIFT) +#define OTAPDLYSEL_SHIFT 12 +#define OTAPDLYSEL_MASK GENMASK(15, 12) +#define STRBSEL_SHIFT 24 +#define STRBSEL_4BIT_MASK GENMASK(27, 24) +#define STRBSEL_8BIT_MASK GENMASK(31, 24) +#define SEL50_SHIFT 8 +#define SEL50_MASK BIT(SEL50_SHIFT) +#define SEL100_SHIFT 9 +#define SEL100_MASK BIT(SEL100_SHIFT) +#define FREQSEL_SHIFT 8 +#define FREQSEL_MASK GENMASK(10, 8) +#define CLKBUFSEL_SHIFT 0 +#define CLKBUFSEL_MASK GENMASK(2, 0) +#define DLL_TRIM_ICP_SHIFT 4 +#define DLL_TRIM_ICP_MASK GENMASK(7, 4) +#define DR_TY_SHIFT 20 +#define DR_TY_MASK GENMASK(22, 20) +#define ENDLL_SHIFT 1 +#define ENDLL_MASK BIT(ENDLL_SHIFT) +#define DLLRDY_SHIFT 0 +#define DLLRDY_MASK BIT(DLLRDY_SHIFT) +#define PDB_SHIFT 0 +#define PDB_MASK BIT(PDB_SHIFT) +#define CALDONE_SHIFT 1 +#define CALDONE_MASK BIT(CALDONE_SHIFT) +#define RETRIM_SHIFT 17 +#define RETRIM_MASK BIT(RETRIM_SHIFT) +#define SELDLYTXCLK_SHIFT 17 +#define SELDLYTXCLK_MASK BIT(SELDLYTXCLK_SHIFT) +#define SELDLYRXCLK_SHIFT 16 +#define SELDLYRXCLK_MASK BIT(SELDLYRXCLK_SHIFT) +#define ITAPDLYSEL_SHIFT 0 +#define ITAPDLYSEL_MASK GENMASK(4, 0) +#define ITAPDLYENA_SHIFT 8 +#define ITAPDLYENA_MASK BIT(ITAPDLYENA_SHIFT) +#define ITAPCHGWIN_SHIFT 9 +#define ITAPCHGWIN_MASK BIT(ITAPCHGWIN_SHIFT) + +#define DRIVER_STRENGTH_50_OHM 0x0 +#define DRIVER_STRENGTH_33_OHM 0x1 +#define DRIVER_STRENGTH_66_OHM 0x2 +#define DRIVER_STRENGTH_100_OHM 0x3 +#define DRIVER_STRENGTH_40_OHM 0x4 + +#define AM654_SDHCI_MIN_FREQ 400000 +#define CLOCK_TOO_SLOW_HZ 50000000 + +#define ENABLE 0x1 + +struct am654_sdhci_plat { + struct mmc_config cfg; + struct mmc mmc; + struct regmap *base; + bool non_removable; + u32 otap_del_sel[MMC_MODES_END]; + u32 itap_del_sel[MMC_MODES_END]; + u32 itap_del_ena[MMC_MODES_END]; + u32 trm_icp; + u32 drv_strength; + u32 strb_sel; + u32 clkbuf_sel; + u32 flags; + bool dll_enable; +#define DLL_PRESENT BIT(0) +#define IOMUX_PRESENT BIT(1) +#define FREQSEL_2_BIT BIT(2) +#define STRBSEL_4_BIT BIT(3) +#define DLL_CALIB BIT(4) + u32 quirks; +#define SDHCI_AM654_QUIRK_FORCE_CDTEST BIT(0) +}; + +struct timing_data { + const char *otap_binding; + const char *itap_binding; + u32 capability; +}; + +struct window { + u8 start; + u8 end; + u8 length; +}; + +static const struct timing_data td[] = { + [MMC_LEGACY] = {"ti,otap-del-sel-legacy", + "ti,itap-del-sel-legacy", + 0}, + [MMC_HS] = {"ti,otap-del-sel-mmc-hs", + "ti,itap-del-sel-mms-hs", + MMC_CAP(MMC_HS)}, + [SD_HS] = {"ti,otap-del-sel-sd-hs", + "ti,itap-del-sel-sd-hs", + MMC_CAP(SD_HS)}, + [UHS_SDR12] = {"ti,otap-del-sel-sdr12", + "ti,itap-del-sel-sdr12", + MMC_CAP(UHS_SDR12)}, + [UHS_SDR25] = {"ti,otap-del-sel-sdr25", + "ti,itap-del-sel-sdr25", + MMC_CAP(UHS_SDR25)}, + [UHS_SDR50] = {"ti,otap-del-sel-sdr50", + NULL, + MMC_CAP(UHS_SDR50)}, + [UHS_SDR104] = {"ti,otap-del-sel-sdr104", + NULL, + MMC_CAP(UHS_SDR104)}, + [UHS_DDR50] = {"ti,otap-del-sel-ddr50", + NULL, + MMC_CAP(UHS_DDR50)}, + [MMC_DDR_52] = {"ti,otap-del-sel-ddr52", + "ti,itap-del-sel-ddr52", + MMC_CAP(MMC_DDR_52)}, + [MMC_HS_200] = {"ti,otap-del-sel-hs200", + NULL, + MMC_CAP(MMC_HS_200)}, + [MMC_HS_400] = {"ti,otap-del-sel-hs400", + NULL, + MMC_CAP(MMC_HS_400)}, +}; + +struct am654_driver_data { + const struct sdhci_ops *ops; + u32 flags; +}; + +static int am654_sdhci_setup_dll(struct am654_sdhci_plat *plat, + unsigned int speed) +{ + int sel50, sel100, freqsel; + u32 mask, val; + int ret; + + /* Disable delay chain mode */ + regmap_update_bits(plat->base, PHY_CTRL5, + SELDLYTXCLK_MASK | SELDLYRXCLK_MASK, 0); + + if (plat->flags & FREQSEL_2_BIT) { + switch (speed) { + case 200000000: + sel50 = 0; + sel100 = 0; + break; + case 100000000: + sel50 = 0; + sel100 = 1; + break; + default: + sel50 = 1; + sel100 = 0; + } + + /* Configure PHY DLL frequency */ + mask = SEL50_MASK | SEL100_MASK; + val = (sel50 << SEL50_SHIFT) | (sel100 << SEL100_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL5, mask, val); + } else { + switch (speed) { + case 200000000: + freqsel = 0x0; + break; + default: + freqsel = 0x4; + } + regmap_update_bits(plat->base, PHY_CTRL5, FREQSEL_MASK, + freqsel << FREQSEL_SHIFT); + } + + /* Configure DLL TRIM */ + mask = DLL_TRIM_ICP_MASK; + val = plat->trm_icp << DLL_TRIM_ICP_SHIFT; + + /* Configure DLL driver strength */ + mask |= DR_TY_MASK; + val |= plat->drv_strength << DR_TY_SHIFT; + regmap_update_bits(plat->base, PHY_CTRL1, mask, val); + + /* Enable DLL */ + regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK, + 0x1 << ENDLL_SHIFT); + /* + * Poll for DLL ready. Use a one second timeout. + * Works in all experiments done so far + */ + ret = regmap_read_poll_timeout(plat->base, PHY_STAT1, val, + val & DLLRDY_MASK, 1000, 1000000); + + return ret; +} + +static void am654_sdhci_write_itapdly(struct am654_sdhci_plat *plat, + u32 itapdly, u32 enable) +{ + regmap_update_bits(plat->base, PHY_CTRL4, ITAPDLYENA_MASK, + enable << ITAPDLYENA_SHIFT); + /* Set ITAPCHGWIN before writing to ITAPDLY */ + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, + 1 << ITAPCHGWIN_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL4, ITAPDLYSEL_MASK, + itapdly << ITAPDLYSEL_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, 0); +} + +static void am654_sdhci_setup_delay_chain(struct am654_sdhci_plat *plat, + int mode) +{ + u32 mask, val; + + val = 1 << SELDLYTXCLK_SHIFT | 1 << SELDLYRXCLK_SHIFT; + mask = SELDLYTXCLK_MASK | SELDLYRXCLK_MASK; + regmap_update_bits(plat->base, PHY_CTRL5, mask, val); + + am654_sdhci_write_itapdly(plat, plat->itap_del_sel[mode], + plat->itap_del_ena[mode]); +} + +static int am654_sdhci_set_ios_post(struct sdhci_host *host) +{ + struct udevice *dev = host->mmc->dev; + struct am654_sdhci_plat *plat = dev_get_plat(dev); + unsigned int speed = host->mmc->clock; + int mode = host->mmc->selected_mode; + u32 otap_del_sel; + u32 mask, val; + int ret; + + /* Reset SD Clock Enable */ + val = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + val &= ~SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, val, SDHCI_CLOCK_CONTROL); + + regmap_update_bits(plat->base, PHY_CTRL1, ENDLL_MASK, 0); + + /* restart clock */ + sdhci_set_clock(host->mmc, speed); + + /* switch phy back on */ + otap_del_sel = plat->otap_del_sel[mode]; + mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; + val = (1 << OTAPDLYENA_SHIFT) | + (otap_del_sel << OTAPDLYSEL_SHIFT); + + /* Write to STRBSEL for HS400 speed mode */ + if (host->mmc->selected_mode == MMC_HS_400) { + if (plat->flags & STRBSEL_4_BIT) + mask |= STRBSEL_4BIT_MASK; + else + mask |= STRBSEL_8BIT_MASK; + + val |= plat->strb_sel << STRBSEL_SHIFT; + } + + regmap_update_bits(plat->base, PHY_CTRL4, mask, val); + + if ((mode > UHS_SDR25 || mode == MMC_DDR_52) && speed >= CLOCK_TOO_SLOW_HZ) { + ret = am654_sdhci_setup_dll(plat, speed); + if (ret) + return ret; + + plat->dll_enable = true; + if (mode == MMC_HS_400) { + plat->itap_del_ena[mode] = ENABLE; + plat->itap_del_sel[mode] = plat->itap_del_sel[mode - 1]; + } + + am654_sdhci_write_itapdly(plat, plat->itap_del_sel[mode], + plat->itap_del_ena[mode]); + } else { + am654_sdhci_setup_delay_chain(plat, mode); + plat->dll_enable = false; + } + + regmap_update_bits(plat->base, PHY_CTRL5, CLKBUFSEL_MASK, + plat->clkbuf_sel); + + return 0; +} + +int am654_sdhci_init(struct am654_sdhci_plat *plat) +{ + u32 ctl_cfg_2 = 0; + u32 mask, val; + int ret; + + /* Reset OTAP to default value */ + mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; + regmap_update_bits(plat->base, PHY_CTRL4, mask, 0x0); + + if (plat->flags & DLL_CALIB) { + regmap_read(plat->base, PHY_STAT1, &val); + if (~val & CALDONE_MASK) { + /* Calibrate IO lines */ + regmap_update_bits(plat->base, PHY_CTRL1, PDB_MASK, + PDB_MASK); + ret = regmap_read_poll_timeout(plat->base, PHY_STAT1, + val, val & CALDONE_MASK, + 1, 20); + if (ret) + return ret; + } + } + + /* Enable pins by setting IO mux to 0 */ + if (plat->flags & IOMUX_PRESENT) + regmap_update_bits(plat->base, PHY_CTRL1, IOMUX_ENABLE_MASK, 0); + + /* Set slot type based on SD or eMMC */ + if (plat->non_removable) + ctl_cfg_2 = SLOTTYPE_EMBEDDED; + + regmap_update_bits(plat->base, CTL_CFG_2, SLOTTYPE_MASK, ctl_cfg_2); + + return 0; +} + +#define MAX_SDCD_DEBOUNCE_TIME 2000 +static int am654_sdhci_cd_poll(struct mmc *mmc) +{ + unsigned long start; + int val; + + /* + * The controller takes about 1 second to debounce the card detect line + * and doesn't let us power on until that time is up. Instead of waiting + * for 1 second at every stage, poll on the CARD_PRESENT bit upto a + * maximum of 2 seconds to be safe.. + */ + start = get_timer(0); + do { + if (get_timer(start) > MAX_SDCD_DEBOUNCE_TIME) + return -ENOMEDIUM; + + val = mmc_getcd(mmc); + } while (!val); + + return 0; +} + +static int am654_sdhci_deferred_probe(struct sdhci_host *host) +{ + struct udevice *dev = host->mmc->dev; + struct am654_sdhci_plat *plat = dev_get_plat(dev); + int ret; + + if (!(plat->quirks & SDHCI_AM654_QUIRK_FORCE_CDTEST)) { + if (am654_sdhci_cd_poll(host->mmc)) + return -ENOMEDIUM; + } + + am654_sdhci_init(plat); + + ret = sdhci_probe(dev); + + if (plat->quirks & SDHCI_AM654_QUIRK_FORCE_CDTEST) { + u8 hostctrlreg = sdhci_readb(host, SDHCI_HOST_CONTROL); + + hostctrlreg |= SDHCI_CTRL_CD_TEST_INS | SDHCI_CTRL_CD_TEST; + sdhci_writeb(host, hostctrlreg, SDHCI_HOST_CONTROL); + } + + return ret; +} + +static void am654_sdhci_write_b(struct sdhci_host *host, u8 val, int reg) +{ + if (reg == SDHCI_HOST_CONTROL) { + switch (host->mmc->selected_mode) { + /* + * According to the data manual, HISPD bit + * should not be set in these speed modes. + */ + case SD_HS: + case MMC_HS: + case UHS_SDR12: + case UHS_SDR25: + val &= ~SDHCI_CTRL_HISPD; + default: + break; + } + } + + writeb(val, host->ioaddr + reg); +} +#if CONFIG_IS_ENABLED(MMC_SUPPORTS_TUNING) +#define ITAPDLY_LENGTH 32 +#define ITAPDLY_LAST_INDEX (ITAPDLY_LENGTH - 1) + +static u32 am654_sdhci_calculate_itap(struct udevice *dev, struct window + *fail_window, u8 num_fails, bool circular_buffer) +{ + u8 itap = 0, start_fail = 0, end_fail = 0, pass_length = 0; + u8 first_fail_start = 0, last_fail_end = 0; + struct window pass_window = {0, 0, 0}; + int prev_fail_end = -1; + u8 i; + + if (!num_fails) + return ITAPDLY_LAST_INDEX >> 1; + + if (fail_window->length == ITAPDLY_LENGTH) { + dev_err(dev, "No passing ITAPDLY, return 0\n"); + return 0; + } + + first_fail_start = fail_window->start; + last_fail_end = fail_window[num_fails - 1].end; + + for (i = 0; i < num_fails; i++) { + start_fail = fail_window[i].start; + end_fail = fail_window[i].end; + pass_length = start_fail - (prev_fail_end + 1); + + if (pass_length > pass_window.length) { + pass_window.start = prev_fail_end + 1; + pass_window.length = pass_length; + } + prev_fail_end = end_fail; + } + + if (!circular_buffer) + pass_length = ITAPDLY_LAST_INDEX - last_fail_end; + else + pass_length = ITAPDLY_LAST_INDEX - last_fail_end + first_fail_start; + + if (pass_length > pass_window.length) { + pass_window.start = last_fail_end + 1; + pass_window.length = pass_length; + } + + if (!circular_buffer) + itap = pass_window.start + (pass_window.length >> 1); + else + itap = (pass_window.start + (pass_window.length >> 1)) % ITAPDLY_LENGTH; + + return (itap > ITAPDLY_LAST_INDEX) ? ITAPDLY_LAST_INDEX >> 1 : itap; +} + +static int am654_sdhci_execute_tuning(struct mmc *mmc, u8 opcode) +{ + struct udevice *dev = mmc->dev; + struct am654_sdhci_plat *plat = dev_get_plat(dev); + struct window fail_window[ITAPDLY_LENGTH]; + int mode = mmc->selected_mode; + u8 curr_pass, itap; + u8 fail_index = 0; + u8 prev_pass = 1; + + memset(fail_window, 0, sizeof(fail_window)); + + /* Enable ITAPDLY */ + plat->itap_del_ena[mode] = ENABLE; + + for (itap = 0; itap < ITAPDLY_LENGTH; itap++) { + am654_sdhci_write_itapdly(plat, itap, plat->itap_del_ena[mode]); + + curr_pass = !mmc_send_tuning(mmc, opcode); + + if (!curr_pass && prev_pass) + fail_window[fail_index].start = itap; + + if (!curr_pass) { + fail_window[fail_index].end = itap; + fail_window[fail_index].length++; + } + + if (curr_pass && !prev_pass) + fail_index++; + + prev_pass = curr_pass; + } + + if (fail_window[fail_index].length != 0) + fail_index++; + + itap = am654_sdhci_calculate_itap(dev, fail_window, fail_index, + plat->dll_enable); + + /* Save ITAPDLY */ + plat->itap_del_sel[mode] = itap; + + am654_sdhci_write_itapdly(plat, itap, plat->itap_del_ena[mode]); + + return 0; +} +#endif +const struct sdhci_ops am654_sdhci_ops = { +#if CONFIG_IS_ENABLED(MMC_SUPPORTS_TUNING) + .platform_execute_tuning = am654_sdhci_execute_tuning, +#endif + .deferred_probe = am654_sdhci_deferred_probe, + .set_ios_post = &am654_sdhci_set_ios_post, + .set_control_reg = sdhci_set_control_reg, + .write_b = am654_sdhci_write_b, +}; + +const struct am654_driver_data am654_drv_data = { + .ops = &am654_sdhci_ops, + .flags = DLL_PRESENT | IOMUX_PRESENT | FREQSEL_2_BIT | STRBSEL_4_BIT, +}; + +const struct am654_driver_data am654_sr1_drv_data = { + .ops = &am654_sdhci_ops, + .flags = IOMUX_PRESENT | FREQSEL_2_BIT | DLL_PRESENT | DLL_CALIB | + STRBSEL_4_BIT, +}; + +const struct am654_driver_data j721e_8bit_drv_data = { + .ops = &am654_sdhci_ops, + .flags = DLL_PRESENT | DLL_CALIB, +}; + +static int j721e_4bit_sdhci_set_ios_post(struct sdhci_host *host) +{ + struct udevice *dev = host->mmc->dev; + struct am654_sdhci_plat *plat = dev_get_plat(dev); + int mode = host->mmc->selected_mode; + u32 otap_del_sel; + u32 itap_del_ena; + u32 itap_del_sel; + u32 mask, val; + + otap_del_sel = plat->otap_del_sel[mode]; + + mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; + val = (1 << OTAPDLYENA_SHIFT) | + (otap_del_sel << OTAPDLYSEL_SHIFT); + + itap_del_ena = plat->itap_del_ena[mode]; + itap_del_sel = plat->itap_del_sel[mode]; + + mask |= ITAPDLYENA_MASK | ITAPDLYSEL_MASK; + val |= (itap_del_ena << ITAPDLYENA_SHIFT) | + (itap_del_sel << ITAPDLYSEL_SHIFT); + + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, + 1 << ITAPCHGWIN_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL4, mask, val); + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, 0); + + regmap_update_bits(plat->base, PHY_CTRL5, CLKBUFSEL_MASK, + plat->clkbuf_sel); + + return 0; +} + +const struct sdhci_ops j721e_4bit_sdhci_ops = { +#if CONFIG_IS_ENABLED(MMC_SUPPORTS_TUNING) + .platform_execute_tuning = am654_sdhci_execute_tuning, +#endif + .deferred_probe = am654_sdhci_deferred_probe, + .set_ios_post = &j721e_4bit_sdhci_set_ios_post, + .set_control_reg = sdhci_set_control_reg, + .write_b = am654_sdhci_write_b, +}; + +const struct am654_driver_data j721e_4bit_drv_data = { + .ops = &j721e_4bit_sdhci_ops, + .flags = IOMUX_PRESENT, +}; + +static const struct am654_driver_data sdhci_am64_8bit_drvdata = { + .ops = &am654_sdhci_ops, + .flags = DLL_PRESENT | DLL_CALIB, +}; + +static const struct am654_driver_data sdhci_am64_4bit_drvdata = { + .ops = &j721e_4bit_sdhci_ops, + .flags = IOMUX_PRESENT, +}; + +const struct soc_attr am654_sdhci_soc_attr[] = { + { .family = "AM65X", .revision = "SR1.0", .data = &am654_sr1_drv_data}, + {/* sentinel */} +}; + +static int sdhci_am654_get_otap_delay(struct udevice *dev, + struct mmc_config *cfg) +{ + struct am654_sdhci_plat *plat = dev_get_plat(dev); + int ret; + int i; + + /* ti,otap-del-sel-legacy is mandatory */ + ret = dev_read_u32(dev, "ti,otap-del-sel-legacy", + &plat->otap_del_sel[0]); + if (ret) + return ret; + /* + * Remove the corresponding capability if an otap-del-sel + * value is not found + */ + for (i = MMC_LEGACY; i <= MMC_HS_400; i++) { + ret = dev_read_u32(dev, td[i].otap_binding, + &plat->otap_del_sel[i]); + if (ret) { + dev_dbg(dev, "Couldn't find %s\n", td[i].otap_binding); + /* + * Remove the corresponding capability + * if an otap-del-sel value is not found + */ + cfg->host_caps &= ~td[i].capability; + } + + if (td[i].itap_binding) { + ret = dev_read_u32(dev, td[i].itap_binding, + &plat->itap_del_sel[i]); + + if (!ret) + plat->itap_del_ena[i] = ENABLE; + } + } + + return 0; +} + +static int am654_sdhci_probe(struct udevice *dev) +{ + struct am654_driver_data *drv_data = + (struct am654_driver_data *)dev_get_driver_data(dev); + struct am654_sdhci_plat *plat = dev_get_plat(dev); + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); + struct sdhci_host *host = dev_get_priv(dev); + struct mmc_config *cfg = &plat->cfg; + const struct soc_attr *soc; + const struct am654_driver_data *soc_drv_data; + struct clk clk; + unsigned long clock; + int ret; + + ret = clk_get_by_name(dev, "clk_xin", &clk); + if (ret) { + dev_err(dev, "failed to get clock\n"); + return ret; + } + + clock = clk_get_rate(&clk); + if (IS_ERR_VALUE(clock)) { + dev_err(dev, "failed to get rate\n"); + return clock; + } + + host->max_clk = clock; + host->mmc = &plat->mmc; + host->mmc->dev = dev; + host->ops = drv_data->ops; + ret = sdhci_setup_cfg(cfg, host, cfg->f_max, + AM654_SDHCI_MIN_FREQ); + if (ret) + return ret; + + ret = sdhci_am654_get_otap_delay(dev, cfg); + if (ret) + return ret; + + /* Update ops based on SoC revision */ + soc = soc_device_match(am654_sdhci_soc_attr); + if (soc && soc->data) { + soc_drv_data = soc->data; + host->ops = soc_drv_data->ops; + } + + host->mmc->priv = host; + upriv->mmc = host->mmc; + + regmap_init_mem_index(dev_ofnode(dev), &plat->base, 1); + + if (plat->quirks & SDHCI_AM654_QUIRK_FORCE_CDTEST) + am654_sdhci_deferred_probe(host); + + return 0; +} + +static int am654_sdhci_of_to_plat(struct udevice *dev) +{ + struct am654_sdhci_plat *plat = dev_get_plat(dev); + struct sdhci_host *host = dev_get_priv(dev); + struct mmc_config *cfg = &plat->cfg; + u32 drv_strength; + int ret; + + host->name = dev->name; + host->ioaddr = dev_read_addr_ptr(dev); + plat->non_removable = dev_read_bool(dev, "non-removable"); + + if (plat->flags & DLL_PRESENT) { + ret = dev_read_u32(dev, "ti,trm-icp", &plat->trm_icp); + if (ret) + return ret; + + ret = dev_read_u32(dev, "ti,driver-strength-ohm", + &drv_strength); + if (ret) + return ret; + + switch (drv_strength) { + case 50: + plat->drv_strength = DRIVER_STRENGTH_50_OHM; + break; + case 33: + plat->drv_strength = DRIVER_STRENGTH_33_OHM; + break; + case 66: + plat->drv_strength = DRIVER_STRENGTH_66_OHM; + break; + case 100: + plat->drv_strength = DRIVER_STRENGTH_100_OHM; + break; + case 40: + plat->drv_strength = DRIVER_STRENGTH_40_OHM; + break; + default: + dev_err(dev, "Invalid driver strength\n"); + return -EINVAL; + } + } + + dev_read_u32(dev, "ti,strobe-sel", &plat->strb_sel); + dev_read_u32(dev, "ti,clkbuf-sel", &plat->clkbuf_sel); + if (dev_read_bool(dev, "ti,fails-without-test-cd")) + plat->quirks |= SDHCI_AM654_QUIRK_FORCE_CDTEST; + + ret = mmc_of_parse(dev, cfg); + if (ret) + return ret; + + return 0; +} + +static int am654_sdhci_bind(struct udevice *dev) +{ + struct am654_driver_data *drv_data = + (struct am654_driver_data *)dev_get_driver_data(dev); + struct am654_sdhci_plat *plat = dev_get_plat(dev); + const struct soc_attr *soc; + const struct am654_driver_data *soc_drv_data; + + plat->flags = drv_data->flags; + + /* Update flags based on SoC revision */ + soc = soc_device_match(am654_sdhci_soc_attr); + if (soc && soc->data) { + soc_drv_data = soc->data; + plat->flags = soc_drv_data->flags; + } + + return sdhci_bind(dev, &plat->mmc, &plat->cfg); +} + +static const struct udevice_id am654_sdhci_ids[] = { + { + .compatible = "ti,am654-sdhci-5.1", + .data = (ulong)&am654_drv_data, + }, + { + .compatible = "ti,j721e-sdhci-8bit", + .data = (ulong)&j721e_8bit_drv_data, + }, + { + .compatible = "ti,j721e-sdhci-4bit", + .data = (ulong)&j721e_4bit_drv_data, + }, + { + .compatible = "ti,am64-sdhci-8bit", + .data = (ulong)&sdhci_am64_8bit_drvdata, + }, + { + .compatible = "ti,am64-sdhci-4bit", + .data = (ulong)&sdhci_am64_4bit_drvdata, + }, + { + .compatible = "ti,am62-sdhci", + .data = (ulong)&sdhci_am64_4bit_drvdata, + }, + { } +}; + +U_BOOT_DRIVER(am654_sdhci_drv) = { + .name = "am654_sdhci", + .id = UCLASS_MMC, + .of_match = am654_sdhci_ids, + .of_to_plat = am654_sdhci_of_to_plat, + .ops = &sdhci_ops, + .bind = am654_sdhci_bind, + .probe = am654_sdhci_probe, + .priv_auto = sizeof(struct sdhci_host), + .plat_auto = sizeof(struct am654_sdhci_plat), +}; |