diff options
Diffstat (limited to 'drivers/mmc/host/sdhci_am654.c')
| -rw-r--r-- | drivers/mmc/host/sdhci_am654.c | 86 |
1 files changed, 63 insertions, 23 deletions
diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c index 061b4398a4f1..f9d24af12396 100644 --- a/drivers/mmc/host/sdhci_am654.c +++ b/drivers/mmc/host/sdhci_am654.c @@ -11,6 +11,7 @@ #include <linux/pm_runtime.h> #include <linux/property.h> #include <linux/regmap.h> +#include <linux/sys_soc.h> #include "cqhci.h" #include "sdhci-pltfm.h" @@ -46,6 +47,8 @@ #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 @@ -60,6 +63,8 @@ #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 DRIVER_STRENGTH_50_OHM 0x0 #define DRIVER_STRENGTH_33_OHM 0x1 @@ -83,6 +88,7 @@ struct sdhci_am654_data { struct regmap *base; bool legacy_otapdly; int otap_del_sel[11]; + int clkbuf_sel; int trm_icp; int drv_strength; bool dll_on; @@ -97,6 +103,7 @@ struct sdhci_am654_driver_data { #define FREQSEL_2_BIT (1 << 1) #define STRBSEL_4_BIT (1 << 2) #define DLL_PRESENT (1 << 3) +#define DLL_CALIB (1 << 4) }; struct timing_data { @@ -202,34 +209,41 @@ static void sdhci_am654_set_clock(struct sdhci_host *host, unsigned int clock) sdhci_set_clock(host, clock); - if (clock > CLOCK_TOO_SLOW_HZ) { - /* 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]; + /* 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; + 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); + 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; + /* 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; - } + val |= sdhci_am654->strb_sel << STRBSEL_SHIFT; + } - regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, val); + regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, val); - if (timing > MMC_TIMING_UHS_SDR25) - sdhci_am654_setup_dll(host, clock); + if (timing > MMC_TIMING_UHS_SDR25 && clock > CLOCK_TOO_SLOW_HZ) { + regmap_update_bits(sdhci_am654->base, PHY_CTRL5, + SELDLYTXCLK_MASK, 0); + sdhci_am654_setup_dll(host, clock); + } else { + regmap_update_bits(sdhci_am654->base, PHY_CTRL5, + SELDLYTXCLK_MASK, 1 << SELDLYTXCLK_SHIFT); } + + 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, @@ -252,6 +266,9 @@ static void sdhci_j721e_4bit_set_clock(struct sdhci_host *host, (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); } @@ -323,6 +340,12 @@ static const struct sdhci_pltfm_data sdhci_am654_pdata = { .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, @@ -348,7 +371,7 @@ static const struct sdhci_pltfm_data sdhci_j721e_8bit_pdata = { static const struct sdhci_am654_driver_data sdhci_j721e_8bit_drvdata = { .pdata = &sdhci_j721e_8bit_pdata, - .flags = DLL_PRESENT, + .flags = DLL_PRESENT | DLL_CALIB, }; static struct sdhci_ops sdhci_j721e_4bit_ops = { @@ -374,6 +397,14 @@ static const struct sdhci_am654_driver_data sdhci_j721e_4bit_drvdata = { .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)); @@ -469,7 +500,7 @@ static int sdhci_am654_init(struct sdhci_host *host) mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, 0x0); - if (sdhci_am654->flags & DLL_PRESENT) { + if (sdhci_am654->flags & DLL_CALIB) { regmap_read(sdhci_am654->base, PHY_STAT1, &val); if (~val & CALDONE_MASK) { /* Calibrate IO lines */ @@ -560,6 +591,8 @@ static int sdhci_am654_get_of_property(struct platform_device *pdev, } device_property_read_u32(dev, "ti,strobe-sel", &sdhci_am654->strb_sel); + device_property_read_u32(dev, "ti,clkbuf-sel", + &sdhci_am654->clkbuf_sel); sdhci_get_of_property(pdev); @@ -585,6 +618,7 @@ static const struct of_device_id 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; @@ -596,6 +630,12 @@ static int sdhci_am654_probe(struct platform_device *pdev) 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); |