From 36c6aadaae863024eae31dfce94db20a4514563d Mon Sep 17 00:00:00 2001 From: Wan Ahmad Zainie Date: Tue, 26 May 2020 14:27:57 +0800 Subject: [PATCH] mmc: sdhci-of-arasan: Add support for Intel Keem Bay Intel Keem Bay SoC eMMC/SD/SDIO controller is based on Arasan SD 3.0 / eMMC 5.1 host controller IP. However, it does not support 64-bit access as its AXI interface has 32-bit address ports. Signed-off-by: Wan Ahmad Zainie Reviewed-by: Adrian Hunter Link: https://lore.kernel.org/r/20200526062758.17642-3-wan.ahmad.zainie.wan.mohamad@intel.com Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-of-arasan.c | 123 +++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index 18bf0e76b1eb..2a4c8a2f3e64 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -75,6 +75,7 @@ struct sdhci_arasan_soc_ctl_field { * * @baseclkfreq: Where to find corecfg_baseclkfreq * @clockmultiplier: Where to find corecfg_clockmultiplier + * @support64b: Where to find SUPPORT64B bit * @hiword_update: If true, use HIWORD_UPDATE to access the syscon * * It's up to the licensee of the Arsan IP block to make these available @@ -84,6 +85,7 @@ struct sdhci_arasan_soc_ctl_field { struct sdhci_arasan_soc_ctl_map { struct sdhci_arasan_soc_ctl_field baseclkfreq; struct sdhci_arasan_soc_ctl_field clockmultiplier; + struct sdhci_arasan_soc_ctl_field support64b; bool hiword_update; }; @@ -184,6 +186,13 @@ static const struct sdhci_arasan_soc_ctl_map intel_lgm_sdxc_soc_ctl_map = { .hiword_update = false, }; +static const struct sdhci_arasan_soc_ctl_map intel_keembay_soc_ctl_map = { + .baseclkfreq = { .reg = 0x0, .width = 8, .shift = 14 }, + .clockmultiplier = { .reg = 0x4, .width = 8, .shift = 14 }, + .support64b = { .reg = 0x4, .width = 1, .shift = 24 }, + .hiword_update = false, +}; + /** * sdhci_arasan_syscon_write - Write to a field in soc_ctl registers * @@ -1113,6 +1122,50 @@ static struct sdhci_arasan_of_data sdhci_arasan_generic_data = { .clk_ops = &arasan_clk_ops, }; +static const struct sdhci_pltfm_data sdhci_keembay_emmc_pdata = { + .ops = &sdhci_arasan_cqe_ops, + .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | + SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | + SDHCI_QUIRK_NO_LED | + SDHCI_QUIRK_32BIT_DMA_ADDR | + SDHCI_QUIRK_32BIT_DMA_SIZE | + SDHCI_QUIRK_32BIT_ADMA_SIZE, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | + SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN | + SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 | + SDHCI_QUIRK2_STOP_WITH_TC | + SDHCI_QUIRK2_BROKEN_64_BIT_DMA, +}; + +static const struct sdhci_pltfm_data sdhci_keembay_sd_pdata = { + .ops = &sdhci_arasan_ops, + .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | + SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | + SDHCI_QUIRK_NO_LED | + SDHCI_QUIRK_32BIT_DMA_ADDR | + SDHCI_QUIRK_32BIT_DMA_SIZE | + SDHCI_QUIRK_32BIT_ADMA_SIZE, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | + SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN | + SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON | + SDHCI_QUIRK2_STOP_WITH_TC | + SDHCI_QUIRK2_BROKEN_64_BIT_DMA, +}; + +static const struct sdhci_pltfm_data sdhci_keembay_sdio_pdata = { + .ops = &sdhci_arasan_ops, + .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | + SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | + SDHCI_QUIRK_NO_LED | + SDHCI_QUIRK_32BIT_DMA_ADDR | + SDHCI_QUIRK_32BIT_DMA_SIZE | + SDHCI_QUIRK_32BIT_ADMA_SIZE, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | + SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN | + SDHCI_QUIRK2_HOST_OFF_CARD_ON | + SDHCI_QUIRK2_BROKEN_64_BIT_DMA, +}; + static struct sdhci_arasan_of_data sdhci_arasan_rk3399_data = { .soc_ctl_map = &rk3399_soc_ctl_map, .pdata = &sdhci_arasan_cqe_pdata, @@ -1158,6 +1211,21 @@ static struct sdhci_arasan_of_data sdhci_arasan_versal_data = { .clk_ops = &versal_clk_ops, }; +static struct sdhci_arasan_of_data intel_keembay_emmc_data = { + .soc_ctl_map = &intel_keembay_soc_ctl_map, + .pdata = &sdhci_keembay_emmc_pdata, +}; + +static struct sdhci_arasan_of_data intel_keembay_sd_data = { + .soc_ctl_map = &intel_keembay_soc_ctl_map, + .pdata = &sdhci_keembay_sd_pdata, +}; + +static struct sdhci_arasan_of_data intel_keembay_sdio_data = { + .soc_ctl_map = &intel_keembay_soc_ctl_map, + .pdata = &sdhci_keembay_sdio_pdata, +}; + static const struct of_device_id sdhci_arasan_of_match[] = { /* SoC-specific compatible strings w/ soc_ctl_map */ { @@ -1172,6 +1240,18 @@ static const struct of_device_id sdhci_arasan_of_match[] = { .compatible = "intel,lgm-sdhci-5.1-sdxc", .data = &intel_lgm_sdxc_data, }, + { + .compatible = "intel,keembay-sdhci-5.1-emmc", + .data = &intel_keembay_emmc_data, + }, + { + .compatible = "intel,keembay-sdhci-5.1-sd", + .data = &intel_keembay_sd_data, + }, + { + .compatible = "intel,keembay-sdhci-5.1-sdio", + .data = &intel_keembay_sdio_data, + }, /* Generic compatible below here */ { .compatible = "arasan,sdhci-8.9a", @@ -1315,6 +1395,40 @@ static void sdhci_arasan_unregister_sdclk(struct device *dev) of_clk_del_provider(dev->of_node); } +/** + * sdhci_arasan_update_support64b - Set SUPPORT_64B (64-bit System Bus Support) + * + * This should be set based on the System Address Bus. + * 0: the Core supports only 32-bit System Address Bus. + * 1: the Core supports 64-bit System Address Bus. + * + * NOTES: + * - For Keem Bay, it is required to clear this bit. Its default value is 1'b1. + * Keem Bay does not support 64-bit access. + * + * @host The sdhci_host + */ +static void sdhci_arasan_update_support64b(struct sdhci_host *host, u32 value) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host); + const struct sdhci_arasan_soc_ctl_map *soc_ctl_map = + sdhci_arasan->soc_ctl_map; + + /* Having a map is optional */ + if (!soc_ctl_map) + return; + + /* If we have a map, we expect to have a syscon */ + if (!sdhci_arasan->soc_ctl_base) { + pr_warn("%s: Have regmap, but no soc-ctl-syscon\n", + mmc_hostname(host->mmc)); + return; + } + + sdhci_arasan_syscon_write(host, &soc_ctl_map->support64b, value); +} + /** * sdhci_arasan_register_sdclk - Register the sdcardclk for a PHY to use * @@ -1487,6 +1601,15 @@ static int sdhci_arasan_probe(struct platform_device *pdev) "rockchip,rk3399-sdhci-5.1")) sdhci_arasan_update_clockmultiplier(host, 0x0); + if (of_device_is_compatible(np, "intel,keembay-sdhci-5.1-emmc") || + of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sd") || + of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sdio")) { + sdhci_arasan_update_clockmultiplier(host, 0x0); + sdhci_arasan_update_support64b(host, 0x0); + + host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; + } + sdhci_arasan_update_baseclkfreq(host); ret = sdhci_arasan_register_sdclk(sdhci_arasan, clk_xin, &pdev->dev);