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148 lines
4.5 KiB
Diff
148 lines
4.5 KiB
Diff
From f901f791d07deaeba6310ac070769575a0bb790a Mon Sep 17 00:00:00 2001
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From: Biwen Li <biwen.li@nxp.com>
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Date: Tue, 30 Oct 2018 18:27:54 +0800
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Subject: [PATCH 36/40] sdhc: support layerscape
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This is an integrated patch of sdhc for layerscape
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Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
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Signed-off-by: Biwen Li <biwen.li@nxp.com>
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---
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drivers/mmc/host/sdhci-of-esdhc.c | 85 +++++++++++++++++++++----------
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1 file changed, 57 insertions(+), 28 deletions(-)
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--- a/drivers/mmc/host/sdhci-of-esdhc.c
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+++ b/drivers/mmc/host/sdhci-of-esdhc.c
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@@ -30,11 +30,56 @@
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#define VENDOR_V_22 0x12
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#define VENDOR_V_23 0x13
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+#define MMC_TIMING_NUM (MMC_TIMING_MMC_HS400 + 1)
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+
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+struct esdhc_clk_fixup {
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+ const unsigned int sd_dflt_max_clk;
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+ const unsigned int max_clk[MMC_TIMING_NUM];
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+};
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+
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+static const struct esdhc_clk_fixup ls1021a_esdhc_clk = {
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+ .sd_dflt_max_clk = 25000000,
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+ .max_clk[MMC_TIMING_MMC_HS] = 46500000,
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+ .max_clk[MMC_TIMING_SD_HS] = 46500000,
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+};
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+
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+static const struct esdhc_clk_fixup ls1046a_esdhc_clk = {
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+ .sd_dflt_max_clk = 25000000,
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+ .max_clk[MMC_TIMING_UHS_SDR104] = 167000000,
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+ .max_clk[MMC_TIMING_MMC_HS200] = 167000000,
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+};
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+
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+static const struct esdhc_clk_fixup ls1012a_esdhc_clk = {
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+ .sd_dflt_max_clk = 25000000,
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+ .max_clk[MMC_TIMING_UHS_SDR104] = 125000000,
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+ .max_clk[MMC_TIMING_MMC_HS200] = 125000000,
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+};
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+
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+static const struct esdhc_clk_fixup p1010_esdhc_clk = {
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+ .sd_dflt_max_clk = 20000000,
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+ .max_clk[MMC_TIMING_LEGACY] = 20000000,
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+ .max_clk[MMC_TIMING_MMC_HS] = 42000000,
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+ .max_clk[MMC_TIMING_SD_HS] = 40000000,
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+};
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+
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+static const struct of_device_id sdhci_esdhc_of_match[] = {
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+ { .compatible = "fsl,ls1021a-esdhc", .data = &ls1021a_esdhc_clk},
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+ { .compatible = "fsl,ls1046a-esdhc", .data = &ls1046a_esdhc_clk},
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+ { .compatible = "fsl,ls1012a-esdhc", .data = &ls1012a_esdhc_clk},
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+ { .compatible = "fsl,p1010-esdhc", .data = &p1010_esdhc_clk},
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+ { .compatible = "fsl,mpc8379-esdhc" },
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+ { .compatible = "fsl,mpc8536-esdhc" },
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+ { .compatible = "fsl,esdhc" },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match);
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+
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struct sdhci_esdhc {
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u8 vendor_ver;
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u8 spec_ver;
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bool quirk_incorrect_hostver;
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unsigned int peripheral_clock;
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+ const struct esdhc_clk_fixup *clk_fixup;
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};
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/**
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@@ -502,6 +547,7 @@ static void esdhc_of_set_clock(struct sd
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int pre_div = 1;
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int div = 1;
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ktime_t timeout;
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+ long fixup = 0;
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u32 temp;
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host->mmc->actual_clock = 0;
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@@ -515,27 +561,14 @@ static void esdhc_of_set_clock(struct sd
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if (esdhc->vendor_ver < VENDOR_V_23)
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pre_div = 2;
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- /*
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- * Limit SD clock to 167MHz for ls1046a according to its datasheet
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- */
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- if (clock > 167000000 &&
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- of_find_compatible_node(NULL, NULL, "fsl,ls1046a-esdhc"))
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- clock = 167000000;
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+ if (host->mmc->card && mmc_card_sd(host->mmc->card) &&
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+ esdhc->clk_fixup && host->mmc->ios.timing == MMC_TIMING_LEGACY)
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+ fixup = esdhc->clk_fixup->sd_dflt_max_clk;
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+ else if (esdhc->clk_fixup)
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+ fixup = esdhc->clk_fixup->max_clk[host->mmc->ios.timing];
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- /*
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- * Limit SD clock to 125MHz for ls1012a according to its datasheet
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- */
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- if (clock > 125000000 &&
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- of_find_compatible_node(NULL, NULL, "fsl,ls1012a-esdhc"))
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- clock = 125000000;
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-
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- /* Workaround to reduce the clock frequency for p1010 esdhc */
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- if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) {
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- if (clock > 20000000)
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- clock -= 5000000;
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- if (clock > 40000000)
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- clock -= 5000000;
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- }
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+ if (fixup && clock > fixup)
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+ clock = fixup;
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temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
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temp &= ~(ESDHC_CLOCK_SDCLKEN | ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN |
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@@ -797,6 +830,7 @@ static struct soc_device_attribute soc_i
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static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
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{
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+ const struct of_device_id *match;
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struct sdhci_pltfm_host *pltfm_host;
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struct sdhci_esdhc *esdhc;
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struct device_node *np;
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@@ -816,6 +850,9 @@ static void esdhc_init(struct platform_d
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else
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esdhc->quirk_incorrect_hostver = false;
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+ match = of_match_node(sdhci_esdhc_of_match, pdev->dev.of_node);
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+ if (match)
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+ esdhc->clk_fixup = match->data;
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np = pdev->dev.of_node;
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clk = of_clk_get(np, 0);
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if (!IS_ERR(clk)) {
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@@ -915,14 +952,6 @@ static int sdhci_esdhc_probe(struct plat
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return ret;
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}
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-static const struct of_device_id sdhci_esdhc_of_match[] = {
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- { .compatible = "fsl,mpc8379-esdhc" },
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- { .compatible = "fsl,mpc8536-esdhc" },
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- { .compatible = "fsl,esdhc" },
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- { }
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-};
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-MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match);
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-
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static struct platform_driver sdhci_esdhc_driver = {
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.driver = {
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.name = "sdhci-esdhc",
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