diff options
Diffstat (limited to 'drivers/mmc/am654_sdhci.c')
| -rw-r--r-- | drivers/mmc/am654_sdhci.c | 173 |
1 files changed, 126 insertions, 47 deletions
diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c index aad9d8b85b..ca76e1f559 100644 --- a/drivers/mmc/am654_sdhci.c +++ b/drivers/mmc/am654_sdhci.c @@ -74,7 +74,7 @@ struct am654_sdhci_plat { struct mmc mmc; struct regmap *base; bool non_removable; - u32 otap_del_sel; + u32 otap_del_sel[11]; u32 trm_icp; u32 drv_strength; u32 strb_sel; @@ -86,6 +86,25 @@ struct am654_sdhci_plat { bool dll_on; }; +struct timing_data { + const char *binding; + u32 capability; +}; + +static const struct timing_data td[] = { + [MMC_LEGACY] = {"ti,otap-del-sel-legacy", 0}, + [MMC_HS] = {"ti,otap-del-sel-mmc-hs", MMC_CAP(MMC_HS)}, + [SD_HS] = {"ti,otap-del-sel-sd-hs", MMC_CAP(SD_HS)}, + [UHS_SDR12] = {"ti,otap-del-sel-sdr12", MMC_CAP(UHS_SDR12)}, + [UHS_SDR25] = {"ti,otap-del-sel-sdr25", MMC_CAP(UHS_SDR25)}, + [UHS_SDR50] = {"ti,otap-del-sel-sdr50", MMC_CAP(UHS_SDR50)}, + [UHS_SDR104] = {"ti,otap-del-sel-sdr104", MMC_CAP(UHS_SDR104)}, + [UHS_DDR50] = {"ti,otap-del-sel-ddr50", MMC_CAP(UHS_DDR50)}, + [MMC_DDR_52] = {"ti,otap-del-sel-ddr52", MMC_CAP(MMC_DDR_52)}, + [MMC_HS_200] = {"ti,otap-del-sel-hs200", MMC_CAP(MMC_HS_200)}, + [MMC_HS_400] = {"ti,otap-del-sel-hs400", MMC_CAP(MMC_HS_400)}, +}; + struct am654_driver_data { const struct sdhci_ops *ops; u32 flags; @@ -112,6 +131,7 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host) struct am654_sdhci_plat *plat = dev_get_platdata(dev); unsigned int speed = host->mmc->clock; int sel50, sel100, freqsel; + u32 otap_del_sel; u32 mask, val; int ret; @@ -132,9 +152,10 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host) /* switch phy back on */ if (speed > AM654_SDHCI_MIN_FREQ) { + otap_del_sel = plat->otap_del_sel[host->mmc->selected_mode]; mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; val = (1 << OTAPDLYENA_SHIFT) | - (plat->otap_del_sel << OTAPDLYSEL_SHIFT); + (otap_del_sel << OTAPDLYSEL_SHIFT); /* Write to STRBSEL for HS400 speed mode */ if (host->mmc->selected_mode == MMC_HS_400) { @@ -197,44 +218,6 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host) return 0; } -const struct sdhci_ops am654_sdhci_ops = { - .set_ios_post = &am654_sdhci_set_ios_post, - .set_control_reg = &am654_sdhci_set_control_reg, -}; - -const struct am654_driver_data am654_drv_data = { - .ops = &am654_sdhci_ops, - .flags = IOMUX_PRESENT | FREQSEL_2_BIT | DLL_PRESENT | STRBSEL_4_BIT, -}; - -const struct am654_driver_data j721e_8bit_drv_data = { - .ops = &am654_sdhci_ops, - .flags = DLL_PRESENT, -}; - -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_platdata(dev); - u32 mask, val; - - mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; - val = (1 << OTAPDLYENA_SHIFT) | - (plat->otap_del_sel << OTAPDLYSEL_SHIFT); - regmap_update_bits(plat->base, PHY_CTRL4, mask, val); - - return 0; -} - -const struct sdhci_ops j721e_4bit_sdhci_ops = { - .set_ios_post = &j721e_4bit_sdhci_set_ios_post, -}; - -const struct am654_driver_data j721e_4bit_drv_data = { - .ops = &j721e_4bit_sdhci_ops, - .flags = IOMUX_PRESENT, -}; - int am654_sdhci_init(struct am654_sdhci_plat *plat) { u32 ctl_cfg_2 = 0; @@ -281,6 +264,104 @@ int am654_sdhci_init(struct am654_sdhci_plat *plat) return 0; } +#define MAX_SDCD_DEBOUNCE_TIME 2000 +static int am654_sdhci_deferred_probe(struct sdhci_host *host) +{ + struct udevice *dev = host->mmc->dev; + struct am654_sdhci_plat *plat = dev_get_platdata(dev); + 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(host->mmc); + } while (!val); + + am654_sdhci_init(plat); + + return sdhci_probe(dev); +} + +const struct sdhci_ops am654_sdhci_ops = { + .deferred_probe = am654_sdhci_deferred_probe, + .set_ios_post = &am654_sdhci_set_ios_post, + .set_control_reg = &am654_sdhci_set_control_reg, +}; + +const struct am654_driver_data am654_drv_data = { + .ops = &am654_sdhci_ops, + .flags = IOMUX_PRESENT | FREQSEL_2_BIT | DLL_PRESENT | STRBSEL_4_BIT, +}; + +const struct am654_driver_data j721e_8bit_drv_data = { + .ops = &am654_sdhci_ops, + .flags = DLL_PRESENT, +}; + +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_platdata(dev); + u32 otap_del_sel, mask, val; + + otap_del_sel = plat->otap_del_sel[host->mmc->selected_mode]; + mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK; + val = (1 << OTAPDLYENA_SHIFT) | (otap_del_sel << OTAPDLYSEL_SHIFT); + regmap_update_bits(plat->base, PHY_CTRL4, mask, val); + + return 0; +} + +const struct sdhci_ops j721e_4bit_sdhci_ops = { + .deferred_probe = am654_sdhci_deferred_probe, + .set_ios_post = &j721e_4bit_sdhci_set_ios_post, +}; + +const struct am654_driver_data j721e_4bit_drv_data = { + .ops = &j721e_4bit_sdhci_ops, + .flags = IOMUX_PRESENT, +}; + +static int sdhci_am654_get_otap_delay(struct udevice *dev, + struct mmc_config *cfg) +{ + struct am654_sdhci_plat *plat = dev_get_platdata(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_HS; i <= MMC_HS_400; i++) { + ret = dev_read_u32(dev, td[i].binding, &plat->otap_del_sel[i]); + if (ret) { + dev_dbg(dev, "Couldn't find %s\n", td[i].binding); + /* + * Remove the corresponding capability + * if an otap-del-sel value is not found + */ + cfg->host_caps &= ~td[i].capability; + } + } + + return 0; +} + static int am654_sdhci_probe(struct udevice *dev) { struct am654_driver_data *drv_data = @@ -313,15 +394,17 @@ static int am654_sdhci_probe(struct udevice *dev) if (ret) return ret; + ret = sdhci_am654_get_otap_delay(dev, cfg); + if (ret) + return ret; + host->ops = drv_data->ops; host->mmc->priv = host; upriv->mmc = host->mmc; regmap_init_mem_index(dev_ofnode(dev), &plat->base, 1); - am654_sdhci_init(plat); - - return sdhci_probe(dev); + return 0; } static int am654_sdhci_ofdata_to_platdata(struct udevice *dev) @@ -336,10 +419,6 @@ static int am654_sdhci_ofdata_to_platdata(struct udevice *dev) host->ioaddr = (void *)dev_read_addr(dev); plat->non_removable = dev_read_bool(dev, "non-removable"); - ret = dev_read_u32(dev, "ti,otap-del-sel", &plat->otap_del_sel); - if (ret) - return ret; - if (plat->flags & DLL_PRESENT) { ret = dev_read_u32(dev, "ti,trm-icp", &plat->trm_icp); if (ret) |