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path: root/drivers/mmc/host/sdhci_am654.c
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Diffstat (limited to 'drivers/mmc/host/sdhci_am654.c')
-rw-r--r--drivers/mmc/host/sdhci_am654.c1003
1 files changed, 1003 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
new file mode 100644
index 0000000000..967bd2dfcd
--- /dev/null
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -0,0 +1,1003 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * sdhci_am654.c - SDHCI driver for TI's AM654 SOCs
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com
+ *
+ */
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/sys_soc.h>
+
+#include "cqhci.h"
+#include "sdhci-cqhci.h"
+#include "sdhci-pltfm.h"
+
+/* CTL_CFG Registers */
+#define CTL_CFG_2 0x14
+#define CTL_CFG_3 0x18
+
+#define SLOTTYPE_MASK GENMASK(31, 30)
+#define SLOTTYPE_EMBEDDED BIT(30)
+#define TUNINGFORSDR50_MASK BIT(13)
+
+/* 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 CLOCK_TOO_SLOW_HZ 50000000
+#define SDHCI_AM654_AUTOSUSPEND_DELAY -1
+
+/* Command Queue Host Controller Interface Base address */
+#define SDHCI_AM654_CQE_BASE_ADDR 0x200
+
+static struct regmap_config sdhci_am654_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .fast_io = true,
+};
+
+struct timing_data {
+ const char *otap_binding;
+ const char *itap_binding;
+ u32 capability;
+};
+
+static const struct timing_data td[] = {
+ [MMC_TIMING_LEGACY] = {"ti,otap-del-sel-legacy",
+ "ti,itap-del-sel-legacy",
+ 0},
+ [MMC_TIMING_MMC_HS] = {"ti,otap-del-sel-mmc-hs",
+ "ti,itap-del-sel-mmc-hs",
+ MMC_CAP_MMC_HIGHSPEED},
+ [MMC_TIMING_SD_HS] = {"ti,otap-del-sel-sd-hs",
+ "ti,itap-del-sel-sd-hs",
+ MMC_CAP_SD_HIGHSPEED},
+ [MMC_TIMING_UHS_SDR12] = {"ti,otap-del-sel-sdr12",
+ "ti,itap-del-sel-sdr12",
+ MMC_CAP_UHS_SDR12},
+ [MMC_TIMING_UHS_SDR25] = {"ti,otap-del-sel-sdr25",
+ "ti,itap-del-sel-sdr25",
+ MMC_CAP_UHS_SDR25},
+ [MMC_TIMING_UHS_SDR50] = {"ti,otap-del-sel-sdr50",
+ NULL,
+ MMC_CAP_UHS_SDR50},
+ [MMC_TIMING_UHS_SDR104] = {"ti,otap-del-sel-sdr104",
+ NULL,
+ MMC_CAP_UHS_SDR104},
+ [MMC_TIMING_UHS_DDR50] = {"ti,otap-del-sel-ddr50",
+ NULL,
+ MMC_CAP_UHS_DDR50},
+ [MMC_TIMING_MMC_DDR52] = {"ti,otap-del-sel-ddr52",
+ "ti,itap-del-sel-ddr52",
+ MMC_CAP_DDR},
+ [MMC_TIMING_MMC_HS200] = {"ti,otap-del-sel-hs200",
+ NULL,
+ MMC_CAP2_HS200},
+ [MMC_TIMING_MMC_HS400] = {"ti,otap-del-sel-hs400",
+ NULL,
+ MMC_CAP2_HS400},
+};
+
+struct sdhci_am654_data {
+ struct regmap *base;
+ bool legacy_otapdly;
+ int otap_del_sel[ARRAY_SIZE(td)];
+ int itap_del_sel[ARRAY_SIZE(td)];
+ int clkbuf_sel;
+ int trm_icp;
+ int drv_strength;
+ int strb_sel;
+ u32 flags;
+ u32 quirks;
+
+#define SDHCI_AM654_QUIRK_FORCE_CDTEST BIT(0)
+};
+
+struct sdhci_am654_driver_data {
+ const struct sdhci_pltfm_data *pdata;
+ u32 flags;
+#define IOMUX_PRESENT (1 << 0)
+#define FREQSEL_2_BIT (1 << 1)
+#define STRBSEL_4_BIT (1 << 2)
+#define DLL_PRESENT (1 << 3)
+#define DLL_CALIB (1 << 4)
+};
+
+static void sdhci_am654_setup_dll(struct sdhci_host *host, unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ int sel50, sel100, freqsel;
+ u32 mask, val;
+ int ret;
+
+ /* Disable delay chain mode */
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL5,
+ SELDLYTXCLK_MASK | SELDLYRXCLK_MASK, 0);
+
+ if (sdhci_am654->flags & FREQSEL_2_BIT) {
+ switch (clock) {
+ 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(sdhci_am654->base, PHY_CTRL5, mask, val);
+
+ } else {
+ switch (clock) {
+ case 200000000:
+ freqsel = 0x0;
+ break;
+ default:
+ freqsel = 0x4;
+ }
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL5, FREQSEL_MASK,
+ freqsel << FREQSEL_SHIFT);
+ }
+ /* Configure DLL TRIM */
+ mask = DLL_TRIM_ICP_MASK;
+ val = sdhci_am654->trm_icp << DLL_TRIM_ICP_SHIFT;
+
+ /* Configure DLL driver strength */
+ mask |= DR_TY_MASK;
+ val |= sdhci_am654->drv_strength << DR_TY_SHIFT;
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1, mask, val);
+
+ /* Enable DLL */
+ regmap_update_bits(sdhci_am654->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(sdhci_am654->base, PHY_STAT1, val,
+ val & DLLRDY_MASK, 1000, 1000000);
+ if (ret) {
+ dev_err(mmc_dev(host->mmc), "DLL failed to relock\n");
+ return;
+ }
+}
+
+static void sdhci_am654_write_itapdly(struct sdhci_am654_data *sdhci_am654,
+ u32 itapdly)
+{
+ /* Set ITAPCHGWIN before writing to ITAPDLY */
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, ITAPCHGWIN_MASK,
+ 1 << ITAPCHGWIN_SHIFT);
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, ITAPDLYSEL_MASK,
+ itapdly << ITAPDLYSEL_SHIFT);
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, ITAPCHGWIN_MASK, 0);
+}
+
+static void sdhci_am654_setup_delay_chain(struct sdhci_am654_data *sdhci_am654,
+ unsigned char timing)
+{
+ u32 mask, val;
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1, ENDLL_MASK, 0);
+
+ val = 1 << SELDLYTXCLK_SHIFT | 1 << SELDLYRXCLK_SHIFT;
+ mask = SELDLYTXCLK_MASK | SELDLYRXCLK_MASK;
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL5, mask, val);
+
+ sdhci_am654_write_itapdly(sdhci_am654,
+ sdhci_am654->itap_del_sel[timing]);
+}
+
+static void sdhci_am654_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ unsigned char timing = host->mmc->ios.timing;
+ u32 otap_del_sel;
+ u32 otap_del_ena;
+ u32 mask, val;
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1, ENDLL_MASK, 0);
+
+ sdhci_set_clock(host, clock);
+
+ /* Setup DLL Output TAP delay */
+ if (sdhci_am654->legacy_otapdly)
+ otap_del_sel = sdhci_am654->otap_del_sel[0];
+ else
+ otap_del_sel = sdhci_am654->otap_del_sel[timing];
+
+ otap_del_ena = (timing > MMC_TIMING_UHS_SDR25) ? 1 : 0;
+
+ mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;
+ val = (otap_del_ena << OTAPDLYENA_SHIFT) |
+ (otap_del_sel << OTAPDLYSEL_SHIFT);
+
+ /* Write to STRBSEL for HS400 speed mode */
+ if (timing == MMC_TIMING_MMC_HS400) {
+ if (sdhci_am654->flags & STRBSEL_4_BIT)
+ mask |= STRBSEL_4BIT_MASK;
+ else
+ mask |= STRBSEL_8BIT_MASK;
+
+ val |= sdhci_am654->strb_sel << STRBSEL_SHIFT;
+ }
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, val);
+
+ if (timing > MMC_TIMING_UHS_SDR25 && clock >= CLOCK_TOO_SLOW_HZ)
+ sdhci_am654_setup_dll(host, clock);
+ else
+ sdhci_am654_setup_delay_chain(sdhci_am654, timing);
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL5, CLKBUFSEL_MASK,
+ sdhci_am654->clkbuf_sel);
+}
+
+static void sdhci_j721e_4bit_set_clock(struct sdhci_host *host,
+ unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ unsigned char timing = host->mmc->ios.timing;
+ u32 otap_del_sel;
+ u32 mask, val;
+
+ /* Setup DLL Output TAP delay */
+ if (sdhci_am654->legacy_otapdly)
+ otap_del_sel = sdhci_am654->otap_del_sel[0];
+ else
+ otap_del_sel = sdhci_am654->otap_del_sel[timing];
+
+ mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;
+ val = (0x1 << OTAPDLYENA_SHIFT) |
+ (otap_del_sel << OTAPDLYSEL_SHIFT);
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, val);
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL5, CLKBUFSEL_MASK,
+ sdhci_am654->clkbuf_sel);
+
+ sdhci_set_clock(host, clock);
+}
+
+static u8 sdhci_am654_write_power_on(struct sdhci_host *host, u8 val, int reg)
+{
+ writeb(val, host->ioaddr + reg);
+ usleep_range(1000, 10000);
+ return readb(host->ioaddr + reg);
+}
+
+#define MAX_POWER_ON_TIMEOUT 1500000 /* us */
+static void sdhci_am654_write_b(struct sdhci_host *host, u8 val, int reg)
+{
+ unsigned char timing = host->mmc->ios.timing;
+ u8 pwr;
+ int ret;
+
+ if (reg == SDHCI_HOST_CONTROL) {
+ switch (timing) {
+ /*
+ * According to the data manual, HISPD bit
+ * should not be set in these speed modes.
+ */
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_MMC_HS:
+ val &= ~SDHCI_CTRL_HISPD;
+ }
+ }
+
+ writeb(val, host->ioaddr + reg);
+ if (reg == SDHCI_POWER_CONTROL && (val & SDHCI_POWER_ON)) {
+ /*
+ * Power on will not happen until the card detect debounce
+ * timer expires. Wait at least 1.5 seconds for the power on
+ * bit to be set
+ */
+ ret = read_poll_timeout(sdhci_am654_write_power_on, pwr,
+ pwr & SDHCI_POWER_ON, 0,
+ MAX_POWER_ON_TIMEOUT, false, host, val,
+ reg);
+ if (ret)
+ dev_info(mmc_dev(host->mmc), "Power on failed\n");
+ }
+}
+
+static void sdhci_am654_reset(struct sdhci_host *host, u8 mask)
+{
+ u8 ctrl;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+
+ sdhci_and_cqhci_reset(host, mask);
+
+ if (sdhci_am654->quirks & SDHCI_AM654_QUIRK_FORCE_CDTEST) {
+ ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+ ctrl |= SDHCI_CTRL_CDTEST_INS | SDHCI_CTRL_CDTEST_EN;
+ sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+ }
+}
+
+static int sdhci_am654_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ int err = sdhci_execute_tuning(mmc, opcode);
+
+ if (err)
+ return err;
+ /*
+ * Tuning data remains in the buffer after tuning.
+ * Do a command and data reset to get rid of it
+ */
+ sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+
+ return 0;
+}
+
+static u32 sdhci_am654_cqhci_irq(struct sdhci_host *host, u32 intmask)
+{
+ int cmd_error = 0;
+ int data_error = 0;
+
+ if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
+ return intmask;
+
+ cqhci_irq(host->mmc, intmask, cmd_error, data_error);
+
+ return 0;
+}
+
+#define ITAP_MAX 32
+static int sdhci_am654_platform_execute_tuning(struct sdhci_host *host,
+ u32 opcode)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ int cur_val, prev_val = 1, fail_len = 0, pass_window = 0, pass_len;
+ u32 itap;
+
+ /* Enable ITAPDLY */
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, ITAPDLYENA_MASK,
+ 1 << ITAPDLYENA_SHIFT);
+
+ for (itap = 0; itap < ITAP_MAX; itap++) {
+ sdhci_am654_write_itapdly(sdhci_am654, itap);
+
+ cur_val = !mmc_send_tuning(host->mmc, opcode, NULL);
+ if (cur_val && !prev_val)
+ pass_window = itap;
+
+ if (!cur_val)
+ fail_len++;
+
+ prev_val = cur_val;
+ }
+ /*
+ * Having determined the length of the failing window and start of
+ * the passing window calculate the length of the passing window and
+ * set the final value halfway through it considering the range as a
+ * circular buffer
+ */
+ pass_len = ITAP_MAX - fail_len;
+ itap = (pass_window + (pass_len >> 1)) % ITAP_MAX;
+ sdhci_am654_write_itapdly(sdhci_am654, itap);
+
+ return 0;
+}
+
+static struct sdhci_ops sdhci_am654_ops = {
+ .platform_execute_tuning = sdhci_am654_platform_execute_tuning,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_bus_width = sdhci_set_bus_width,
+ .set_power = sdhci_set_power_and_bus_voltage,
+ .set_clock = sdhci_am654_set_clock,
+ .write_b = sdhci_am654_write_b,
+ .irq = sdhci_am654_cqhci_irq,
+ .reset = sdhci_and_cqhci_reset,
+};
+
+static const struct sdhci_pltfm_data sdhci_am654_pdata = {
+ .ops = &sdhci_am654_ops,
+ .quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
+static const struct sdhci_am654_driver_data sdhci_am654_sr1_drvdata = {
+ .pdata = &sdhci_am654_pdata,
+ .flags = IOMUX_PRESENT | FREQSEL_2_BIT | STRBSEL_4_BIT | DLL_PRESENT |
+ DLL_CALIB,
+};
+
+static const struct sdhci_am654_driver_data sdhci_am654_drvdata = {
+ .pdata = &sdhci_am654_pdata,
+ .flags = IOMUX_PRESENT | FREQSEL_2_BIT | STRBSEL_4_BIT | DLL_PRESENT,
+};
+
+static struct sdhci_ops sdhci_j721e_8bit_ops = {
+ .platform_execute_tuning = sdhci_am654_platform_execute_tuning,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_bus_width = sdhci_set_bus_width,
+ .set_power = sdhci_set_power_and_bus_voltage,
+ .set_clock = sdhci_am654_set_clock,
+ .write_b = sdhci_am654_write_b,
+ .irq = sdhci_am654_cqhci_irq,
+ .reset = sdhci_and_cqhci_reset,
+};
+
+static const struct sdhci_pltfm_data sdhci_j721e_8bit_pdata = {
+ .ops = &sdhci_j721e_8bit_ops,
+ .quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
+static const struct sdhci_am654_driver_data sdhci_j721e_8bit_drvdata = {
+ .pdata = &sdhci_j721e_8bit_pdata,
+ .flags = DLL_PRESENT | DLL_CALIB,
+};
+
+static struct sdhci_ops sdhci_j721e_4bit_ops = {
+ .platform_execute_tuning = sdhci_am654_platform_execute_tuning,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_bus_width = sdhci_set_bus_width,
+ .set_power = sdhci_set_power_and_bus_voltage,
+ .set_clock = sdhci_j721e_4bit_set_clock,
+ .write_b = sdhci_am654_write_b,
+ .irq = sdhci_am654_cqhci_irq,
+ .reset = sdhci_am654_reset,
+};
+
+static const struct sdhci_pltfm_data sdhci_j721e_4bit_pdata = {
+ .ops = &sdhci_j721e_4bit_ops,
+ .quirks = SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
+static const struct sdhci_am654_driver_data sdhci_j721e_4bit_drvdata = {
+ .pdata = &sdhci_j721e_4bit_pdata,
+ .flags = IOMUX_PRESENT,
+};
+
+static const struct soc_device_attribute sdhci_am654_devices[] = {
+ { .family = "AM65X",
+ .revision = "SR1.0",
+ .data = &sdhci_am654_sr1_drvdata
+ },
+ {/* sentinel */}
+};
+
+static void sdhci_am654_dumpregs(struct mmc_host *mmc)
+{
+ sdhci_dumpregs(mmc_priv(mmc));
+}
+
+static const struct cqhci_host_ops sdhci_am654_cqhci_ops = {
+ .enable = sdhci_cqe_enable,
+ .disable = sdhci_cqe_disable,
+ .dumpregs = sdhci_am654_dumpregs,
+};
+
+static int sdhci_am654_cqe_add_host(struct sdhci_host *host)
+{
+ struct cqhci_host *cq_host;
+
+ cq_host = devm_kzalloc(mmc_dev(host->mmc), sizeof(struct cqhci_host),
+ GFP_KERNEL);
+ if (!cq_host)
+ return -ENOMEM;
+
+ cq_host->mmio = host->ioaddr + SDHCI_AM654_CQE_BASE_ADDR;
+ cq_host->quirks |= CQHCI_QUIRK_SHORT_TXFR_DESC_SZ;
+ cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
+ cq_host->ops = &sdhci_am654_cqhci_ops;
+
+ host->mmc->caps2 |= MMC_CAP2_CQE;
+
+ return cqhci_init(cq_host, host->mmc, 1);
+}
+
+static int sdhci_am654_get_otap_delay(struct sdhci_host *host,
+ struct sdhci_am654_data *sdhci_am654)
+{
+ struct device *dev = mmc_dev(host->mmc);
+ int i;
+ int ret;
+
+ ret = device_property_read_u32(dev, td[MMC_TIMING_LEGACY].otap_binding,
+ &sdhci_am654->otap_del_sel[MMC_TIMING_LEGACY]);
+ if (ret) {
+ /*
+ * ti,otap-del-sel-legacy is mandatory, look for old binding
+ * if not found.
+ */
+ ret = device_property_read_u32(dev, "ti,otap-del-sel",
+ &sdhci_am654->otap_del_sel[0]);
+ if (ret) {
+ dev_err(dev, "Couldn't find otap-del-sel\n");
+
+ return ret;
+ }
+
+ dev_info(dev, "Using legacy binding ti,otap-del-sel\n");
+ sdhci_am654->legacy_otapdly = true;
+
+ return 0;
+ }
+
+ for (i = MMC_TIMING_LEGACY; i <= MMC_TIMING_MMC_HS400; i++) {
+
+ ret = device_property_read_u32(dev, td[i].otap_binding,
+ &sdhci_am654->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
+ */
+ if (i <= MMC_TIMING_MMC_DDR52)
+ host->mmc->caps &= ~td[i].capability;
+ else
+ host->mmc->caps2 &= ~td[i].capability;
+ }
+
+ if (td[i].itap_binding)
+ device_property_read_u32(dev, td[i].itap_binding,
+ &sdhci_am654->itap_del_sel[i]);
+ }
+
+ return 0;
+}
+
+static int sdhci_am654_init(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ u32 ctl_cfg_2 = 0;
+ u32 mask;
+ u32 val;
+ int ret;
+
+ /* Reset OTAP to default value */
+ mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, 0x0);
+
+ if (sdhci_am654->flags & DLL_CALIB) {
+ regmap_read(sdhci_am654->base, PHY_STAT1, &val);
+ if (~val & CALDONE_MASK) {
+ /* Calibrate IO lines */
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1,
+ PDB_MASK, PDB_MASK);
+ ret = regmap_read_poll_timeout(sdhci_am654->base,
+ PHY_STAT1, val,
+ val & CALDONE_MASK,
+ 1, 20);
+ if (ret)
+ return ret;
+ }
+ }
+
+ /* Enable pins by setting IO mux to 0 */
+ if (sdhci_am654->flags & IOMUX_PRESENT)
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1,
+ IOMUX_ENABLE_MASK, 0);
+
+ /* Set slot type based on SD or eMMC */
+ if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
+ ctl_cfg_2 = SLOTTYPE_EMBEDDED;
+
+ regmap_update_bits(sdhci_am654->base, CTL_CFG_2, SLOTTYPE_MASK,
+ ctl_cfg_2);
+
+ /* Enable tuning for SDR50 */
+ regmap_update_bits(sdhci_am654->base, CTL_CFG_3, TUNINGFORSDR50_MASK,
+ TUNINGFORSDR50_MASK);
+
+ ret = sdhci_setup_host(host);
+ if (ret)
+ return ret;
+
+ ret = sdhci_am654_cqe_add_host(host);
+ if (ret)
+ goto err_cleanup_host;
+
+ ret = sdhci_am654_get_otap_delay(host, sdhci_am654);
+ if (ret)
+ goto err_cleanup_host;
+
+ ret = __sdhci_add_host(host);
+ if (ret)
+ goto err_cleanup_host;
+
+ return 0;
+
+err_cleanup_host:
+ sdhci_cleanup_host(host);
+ return ret;
+}
+
+static int sdhci_am654_get_of_property(struct platform_device *pdev,
+ struct sdhci_am654_data *sdhci_am654)
+{
+ struct device *dev = &pdev->dev;
+ int drv_strength;
+ int ret;
+
+ if (sdhci_am654->flags & DLL_PRESENT) {
+ ret = device_property_read_u32(dev, "ti,trm-icp",
+ &sdhci_am654->trm_icp);
+ if (ret)
+ return ret;
+
+ ret = device_property_read_u32(dev, "ti,driver-strength-ohm",
+ &drv_strength);
+ if (ret)
+ return ret;
+
+ switch (drv_strength) {
+ case 50:
+ sdhci_am654->drv_strength = DRIVER_STRENGTH_50_OHM;
+ break;
+ case 33:
+ sdhci_am654->drv_strength = DRIVER_STRENGTH_33_OHM;
+ break;
+ case 66:
+ sdhci_am654->drv_strength = DRIVER_STRENGTH_66_OHM;
+ break;
+ case 100:
+ sdhci_am654->drv_strength = DRIVER_STRENGTH_100_OHM;
+ break;
+ case 40:
+ sdhci_am654->drv_strength = DRIVER_STRENGTH_40_OHM;
+ break;
+ default:
+ dev_err(dev, "Invalid driver strength\n");
+ return -EINVAL;
+ }
+ }
+
+ device_property_read_u32(dev, "ti,strobe-sel", &sdhci_am654->strb_sel);
+ device_property_read_u32(dev, "ti,clkbuf-sel",
+ &sdhci_am654->clkbuf_sel);
+
+ if (device_property_read_bool(dev, "ti,fails-without-test-cd"))
+ sdhci_am654->quirks |= SDHCI_AM654_QUIRK_FORCE_CDTEST;
+
+ sdhci_get_of_property(pdev);
+
+ return 0;
+}
+
+static const struct of_device_id sdhci_am654_of_match[] = {
+ {
+ .compatible = "ti,am654-sdhci-5.1",
+ .data = &sdhci_am654_drvdata,
+ },
+ {
+ .compatible = "ti,j721e-sdhci-8bit",
+ .data = &sdhci_j721e_8bit_drvdata,
+ },
+ {
+ .compatible = "ti,j721e-sdhci-4bit",
+ .data = &sdhci_j721e_4bit_drvdata,
+ },
+ {
+ .compatible = "ti,am64-sdhci-8bit",
+ .data = &sdhci_j721e_8bit_drvdata,
+ },
+ {
+ .compatible = "ti,am64-sdhci-4bit",
+ .data = &sdhci_j721e_4bit_drvdata,
+ },
+ {
+ .compatible = "ti,am62-sdhci",
+ .data = &sdhci_j721e_4bit_drvdata,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sdhci_am654_of_match);
+
+static int sdhci_am654_probe(struct platform_device *pdev)
+{
+ const struct sdhci_am654_driver_data *drvdata;
+ const struct soc_device_attribute *soc;
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_am654_data *sdhci_am654;
+ const struct of_device_id *match;
+ struct sdhci_host *host;
+ struct clk *clk_xin;
+ struct device *dev = &pdev->dev;
+ void __iomem *base;
+ int ret;
+
+ match = of_match_node(sdhci_am654_of_match, pdev->dev.of_node);
+ drvdata = match->data;
+
+ /* Update drvdata based on SoC revision */
+ soc = soc_device_match(sdhci_am654_devices);
+ if (soc && soc->data)
+ drvdata = soc->data;
+
+ host = sdhci_pltfm_init(pdev, drvdata->pdata, sizeof(*sdhci_am654));
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ pltfm_host = sdhci_priv(host);
+ sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ sdhci_am654->flags = drvdata->flags;
+
+ clk_xin = devm_clk_get(dev, "clk_xin");
+ if (IS_ERR(clk_xin)) {
+ dev_err(dev, "clk_xin clock not found.\n");
+ ret = PTR_ERR(clk_xin);
+ goto err_pltfm_free;
+ }
+
+ pltfm_host->clk = clk_xin;
+
+ base = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(base)) {
+ ret = PTR_ERR(base);
+ goto err_pltfm_free;
+ }
+
+ sdhci_am654->base = devm_regmap_init_mmio(dev, base,
+ &sdhci_am654_regmap_config);
+ if (IS_ERR(sdhci_am654->base)) {
+ dev_err(dev, "Failed to initialize regmap\n");
+ ret = PTR_ERR(sdhci_am654->base);
+ goto err_pltfm_free;
+ }
+
+ ret = sdhci_am654_get_of_property(pdev, sdhci_am654);
+ if (ret)
+ goto err_pltfm_free;
+
+ ret = mmc_of_parse(host->mmc);
+ if (ret) {
+ dev_err_probe(dev, ret, "parsing dt failed\n");
+ goto err_pltfm_free;
+ }
+
+ host->mmc_host_ops.execute_tuning = sdhci_am654_execute_tuning;
+
+ pm_runtime_get_noresume(dev);
+ ret = pm_runtime_set_active(dev);
+ if (ret)
+ goto pm_put;
+ pm_runtime_enable(dev);
+ ret = clk_prepare_enable(pltfm_host->clk);
+ if (ret)
+ goto pm_disable;
+
+ ret = sdhci_am654_init(host);
+ if (ret)
+ goto clk_disable;
+
+ /* Setting up autosuspend */
+ pm_runtime_set_autosuspend_delay(dev, SDHCI_AM654_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+ return 0;
+
+clk_disable:
+ clk_disable_unprepare(pltfm_host->clk);
+pm_disable:
+ pm_runtime_disable(dev);
+pm_put:
+ pm_runtime_put_noidle(dev);
+err_pltfm_free:
+ sdhci_pltfm_free(pdev);
+ return ret;
+}
+
+static void sdhci_am654_remove(struct platform_device *pdev)
+{
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ dev_err(dev, "pm_runtime_get_sync() Failed\n");
+
+ sdhci_remove_host(host, true);
+ clk_disable_unprepare(pltfm_host->clk);
+ pm_runtime_disable(dev);
+ pm_runtime_put_noidle(dev);
+ sdhci_pltfm_free(pdev);
+}
+
+#ifdef CONFIG_PM
+static int sdhci_am654_restore(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ u32 ctl_cfg_2 = 0;
+ u32 val;
+ int ret;
+
+ if (sdhci_am654->flags & DLL_CALIB) {
+ regmap_read(sdhci_am654->base, PHY_STAT1, &val);
+ if (~val & CALDONE_MASK) {
+ /* Calibrate IO lines */
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1,
+ PDB_MASK, PDB_MASK);
+ ret = regmap_read_poll_timeout(sdhci_am654->base,
+ PHY_STAT1, val,
+ val & CALDONE_MASK,
+ 1, 20);
+ if (ret)
+ return ret;
+ }
+ }
+
+ /* Enable pins by setting IO mux to 0 */
+ if (sdhci_am654->flags & IOMUX_PRESENT)
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1,
+ IOMUX_ENABLE_MASK, 0);
+
+ /* Set slot type based on SD or eMMC */
+ if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
+ ctl_cfg_2 = SLOTTYPE_EMBEDDED;
+
+ regmap_update_bits(sdhci_am654->base, CTL_CFG_2, SLOTTYPE_MASK,
+ ctl_cfg_2);
+
+ regmap_read(sdhci_am654->base, CTL_CFG_3, &val);
+ if (~val & TUNINGFORSDR50_MASK)
+ /* Enable tuning for SDR50 */
+ regmap_update_bits(sdhci_am654->base, CTL_CFG_3, TUNINGFORSDR50_MASK,
+ TUNINGFORSDR50_MASK);
+
+ return 0;
+}
+
+static int sdhci_am654_runtime_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int ret;
+
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+
+ ret = cqhci_suspend(host->mmc);
+ if (ret)
+ return ret;
+
+ ret = sdhci_runtime_suspend_host(host);
+ if (ret)
+ return ret;
+
+ /* disable the clock */
+ clk_disable_unprepare(pltfm_host->clk);
+ return 0;
+}
+
+static int sdhci_am654_runtime_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int ret;
+
+ /* Enable the clock */
+ ret = clk_prepare_enable(pltfm_host->clk);
+ if (ret)
+ return ret;
+
+ ret = sdhci_am654_restore(host);
+ if (ret)
+ return ret;
+
+ ret = sdhci_runtime_resume_host(host, 0);
+ if (ret)
+ return ret;
+
+ ret = cqhci_resume(host->mmc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops sdhci_am654_dev_pm_ops = {
+ SET_RUNTIME_PM_OPS(sdhci_am654_runtime_suspend,
+ sdhci_am654_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+
+static struct platform_driver sdhci_am654_driver = {
+ .driver = {
+ .name = "sdhci-am654",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ .pm = &sdhci_am654_dev_pm_ops,
+ .of_match_table = sdhci_am654_of_match,
+ },
+ .probe = sdhci_am654_probe,
+ .remove_new = sdhci_am654_remove,
+};
+
+module_platform_driver(sdhci_am654_driver);
+
+MODULE_DESCRIPTION("Driver for SDHCI Controller on TI's AM654 devices");
+MODULE_AUTHOR("Faiz Abbas <faiz_abbas@ti.com>");
+MODULE_LICENSE("GPL");