diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-cadence.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-cadence.c | 119 |
1 files changed, 85 insertions, 34 deletions
diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c index b24aa27da50c..435603c8c00b 100644 --- a/drivers/mmc/host/sdhci-cadence.c +++ b/drivers/mmc/host/sdhci-cadence.c @@ -11,7 +11,7 @@ #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/of.h> -#include <linux/of_device.h> +#include <linux/platform_device.h> #include <linux/reset.h> #include "sdhci-pltfm.h" @@ -36,6 +36,24 @@ #define SDHCI_CDNS_HRS06_MODE_MMC_HS400 0x5 #define SDHCI_CDNS_HRS06_MODE_MMC_HS400ES 0x6 +/* Read block gap */ +#define SDHCI_CDNS_HRS37 0x94 /* interface mode select */ +#define SDHCI_CDNS_HRS37_MODE_DS 0x0 +#define SDHCI_CDNS_HRS37_MODE_HS 0x1 +#define SDHCI_CDNS_HRS37_MODE_UDS_SDR12 0x8 +#define SDHCI_CDNS_HRS37_MODE_UDS_SDR25 0x9 +#define SDHCI_CDNS_HRS37_MODE_UDS_SDR50 0xa +#define SDHCI_CDNS_HRS37_MODE_UDS_SDR104 0xb +#define SDHCI_CDNS_HRS37_MODE_UDS_DDR50 0xc +#define SDHCI_CDNS_HRS37_MODE_MMC_LEGACY 0x20 +#define SDHCI_CDNS_HRS37_MODE_MMC_SDR 0x21 +#define SDHCI_CDNS_HRS37_MODE_MMC_DDR 0x22 +#define SDHCI_CDNS_HRS37_MODE_MMC_HS200 0x23 +#define SDHCI_CDNS_HRS37_MODE_MMC_HS400 0x24 +#define SDHCI_CDNS_HRS37_MODE_MMC_HS400ES 0x25 +#define SDHCI_CDNS_HRS38 0x98 /* Read block gap coefficient */ +#define SDHCI_CDNS_HRS38_BLKGAP_MAX 0xf + /* SRS - Slot Register Set (SDHCI-compatible) */ #define SDHCI_CDNS_SRS_BASE 0x200 @@ -144,7 +162,7 @@ static unsigned int sdhci_cdns_phy_param_count(struct device_node *np) int i; for (i = 0; i < ARRAY_SIZE(sdhci_cdns_phy_cfgs); i++) - if (of_property_read_bool(np, sdhci_cdns_phy_cfgs[i].property)) + if (of_property_present(np, sdhci_cdns_phy_cfgs[i].property)) count++; return count; @@ -251,6 +269,43 @@ static int sdhci_cdns_set_tune_val(struct sdhci_host *host, unsigned int val) return 0; } +/** + * sdhci_cdns_tune_blkgap() - tune multi-block read gap + * @mmc: MMC host + * + * Tune delay used in multi block read. To do so, + * try sending multi-block read command with incremented gap, unless + * it succeeds. + * + * Return: error code + */ +static int sdhci_cdns_tune_blkgap(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_cdns_priv *priv = sdhci_pltfm_priv(pltfm_host); + void __iomem *hrs37_reg = priv->hrs_addr + SDHCI_CDNS_HRS37; + void __iomem *hrs38_reg = priv->hrs_addr + SDHCI_CDNS_HRS38; + int ret; + u32 gap; + + /* Currently only needed in HS200 mode */ + if (host->timing != MMC_TIMING_MMC_HS200) + return 0; + + writel(SDHCI_CDNS_HRS37_MODE_MMC_HS200, hrs37_reg); + + for (gap = 0; gap <= SDHCI_CDNS_HRS38_BLKGAP_MAX; gap++) { + writel(gap, hrs38_reg); + ret = mmc_read_tuning(mmc, 512, 32); + if (!ret) + break; + } + + dev_dbg(mmc_dev(mmc), "read block gap tune %s, gap %d\n", ret ? "failed" : "OK", gap); + return ret; +} + /* * In SD mode, software must not use the hardware tuning and instead perform * an almost identical procedure to eMMC. @@ -261,6 +316,7 @@ static int sdhci_cdns_execute_tuning(struct sdhci_host *host, u32 opcode) int max_streak = 0; int end_of_streak = 0; int i; + int ret; /* * Do not execute tuning for UHS_SDR50 or UHS_DDR50. @@ -288,7 +344,11 @@ static int sdhci_cdns_execute_tuning(struct sdhci_host *host, u32 opcode) return -EIO; } - return sdhci_cdns_set_tune_val(host, end_of_streak - max_streak / 2); + ret = sdhci_cdns_set_tune_val(host, end_of_streak - max_streak / 2); + if (ret) + return ret; + + return sdhci_cdns_tune_blkgap(host->mmc); } static void sdhci_cdns_set_uhs_signaling(struct sdhci_host *host, @@ -433,6 +493,13 @@ static const struct sdhci_cdns_drv_data sdhci_elba_drv_data = { }, }; +static const struct sdhci_cdns_drv_data sdhci_eyeq_drv_data = { + .pltfm_data = { + .ops = &sdhci_cdns_ops, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, + }, +}; + static const struct sdhci_cdns_drv_data sdhci_cdns_drv_data = { .pltfm_data = { .ops = &sdhci_cdns_ops, @@ -487,14 +554,10 @@ static int sdhci_cdns_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; static const u16 version = SDHCI_SPEC_400 << SDHCI_SPEC_VER_SHIFT; - clk = devm_clk_get(dev, NULL); + clk = devm_clk_get_enabled(dev, NULL); if (IS_ERR(clk)) return PTR_ERR(clk); - ret = clk_prepare_enable(clk); - if (ret) - return ret; - data = of_device_get_match_data(dev); if (!data) data = &sdhci_cdns_drv_data; @@ -502,10 +565,8 @@ static int sdhci_cdns_probe(struct platform_device *pdev) nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node); host = sdhci_pltfm_init(pdev, &data->pltfm_data, struct_size(priv, phy_params, nr_phy_params)); - if (IS_ERR(host)) { - ret = PTR_ERR(host); - goto disable_clk; - } + if (IS_ERR(host)) + return PTR_ERR(host); pltfm_host = sdhci_priv(host); pltfm_host->clk = clk; @@ -521,7 +582,7 @@ static int sdhci_cdns_probe(struct platform_device *pdev) if (data->init) { ret = data->init(pdev); if (ret) - goto free; + return ret; } sdhci_enable_v4_mode(host); __sdhci_read_caps(host, &version, NULL, NULL); @@ -530,37 +591,26 @@ static int sdhci_cdns_probe(struct platform_device *pdev) ret = mmc_of_parse(host->mmc); if (ret) - goto free; + return ret; sdhci_cdns_phy_param_parse(dev->of_node, priv); ret = sdhci_cdns_phy_init(priv); if (ret) - goto free; + return ret; if (host->mmc->caps & MMC_CAP_HW_RESET) { priv->rst_hw = devm_reset_control_get_optional_exclusive(dev, NULL); if (IS_ERR(priv->rst_hw)) return dev_err_probe(mmc_dev(host->mmc), PTR_ERR(priv->rst_hw), - "reset controller error\n"); + "reset controller error\n"); if (priv->rst_hw) host->mmc_host_ops.card_hw_reset = sdhci_cdns_mmc_hw_reset; } - ret = sdhci_add_host(host); - if (ret) - goto free; - - return 0; -free: - sdhci_pltfm_free(pdev); -disable_clk: - clk_disable_unprepare(clk); - - return ret; + return sdhci_add_host(host); } -#ifdef CONFIG_PM_SLEEP static int sdhci_cdns_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); @@ -587,11 +637,8 @@ disable_clk: return ret; } -#endif -static const struct dev_pm_ops sdhci_cdns_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_cdns_resume) -}; +static DEFINE_SIMPLE_DEV_PM_OPS(sdhci_cdns_pm_ops, sdhci_pltfm_suspend, sdhci_cdns_resume); static const struct of_device_id sdhci_cdns_match[] = { { @@ -602,6 +649,10 @@ static const struct of_device_id sdhci_cdns_match[] = { .compatible = "amd,pensando-elba-sd4hc", .data = &sdhci_elba_drv_data, }, + { + .compatible = "mobileye,eyeq-sd4hc", + .data = &sdhci_eyeq_drv_data, + }, { .compatible = "cdns,sd4hc" }, { /* sentinel */ } }; @@ -611,11 +662,11 @@ static struct platform_driver sdhci_cdns_driver = { .driver = { .name = "sdhci-cdns", .probe_type = PROBE_PREFER_ASYNCHRONOUS, - .pm = &sdhci_cdns_pm_ops, + .pm = pm_sleep_ptr(&sdhci_cdns_pm_ops), .of_match_table = sdhci_cdns_match, }, .probe = sdhci_cdns_probe, - .remove = sdhci_pltfm_unregister, + .remove = sdhci_pltfm_remove, }; module_platform_driver(sdhci_cdns_driver); |