| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Faiz Abbas | 3195 | 76.36% | 24 | 41.38% |
| Aswath Govindraju | 401 | 9.58% | 3 | 5.17% |
| Sören Brinkmann | 288 | 6.88% | 1 | 1.72% |
| Shawn Lin | 76 | 1.82% | 4 | 6.90% |
| Vignesh R | 68 | 1.63% | 1 | 1.72% |
| JiSheng Zhang | 40 | 0.96% | 2 | 3.45% |
| Russell King | 30 | 0.72% | 3 | 5.17% |
| Doug Anderson | 16 | 0.38% | 3 | 5.17% |
| Suneel Garapati | 15 | 0.36% | 1 | 1.72% |
| Michal Simek | 12 | 0.29% | 1 | 1.72% |
| Yangtao Li | 12 | 0.29% | 3 | 5.17% |
| Milan Stevanovic | 6 | 0.14% | 1 | 1.72% |
| Brian Norris | 6 | 0.14% | 1 | 1.72% |
| Julia Lawall | 3 | 0.07% | 1 | 1.72% |
| Matthias Schiffer | 3 | 0.07% | 1 | 1.72% |
| Nicolas Saenz Julienne | 3 | 0.07% | 1 | 1.72% |
| Yue haibing | 3 | 0.07% | 1 | 1.72% |
| Suman Tripathi | 2 | 0.05% | 1 | 1.72% |
| ye xingchen | 1 | 0.02% | 1 | 1.72% |
| Alexander A. Klimov | 1 | 0.02% | 1 | 1.72% |
| Nitin Yadav | 1 | 0.02% | 1 | 1.72% |
| Francesco Dolcini | 1 | 0.02% | 1 | 1.72% |
| Wei Yongjun | 1 | 0.02% | 1 | 1.72% |
| Total | 4184 | 58 |
// 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");
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