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path: root/drivers/mmc/host/sdhci-pxav3.c
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Diffstat (limited to 'drivers/mmc/host/sdhci-pxav3.c')
-rw-r--r--drivers/mmc/host/sdhci-pxav3.c583
1 files changed, 583 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
new file mode 100644
index 000000000..a6d89a3f1
--- /dev/null
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -0,0 +1,583 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2010 Marvell International Ltd.
+ * Zhangfei Gao <zhangfei.gao@marvell.com>
+ * Kevin Wang <dwang4@marvell.com>
+ * Mingwei Wang <mwwang@marvell.com>
+ * Philip Rakity <prakity@marvell.com>
+ * Mark Brown <markb@marvell.com>
+ */
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/platform_data/pxa_sdhci.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/mbus.h>
+
+#include "sdhci.h"
+#include "sdhci-pltfm.h"
+
+#define PXAV3_RPM_DELAY_MS 50
+
+#define SD_CLOCK_BURST_SIZE_SETUP 0x10A
+#define SDCLK_SEL 0x100
+#define SDCLK_DELAY_SHIFT 9
+#define SDCLK_DELAY_MASK 0x1f
+
+#define SD_CFG_FIFO_PARAM 0x100
+#define SDCFG_GEN_PAD_CLK_ON (1<<6)
+#define SDCFG_GEN_PAD_CLK_CNT_MASK 0xFF
+#define SDCFG_GEN_PAD_CLK_CNT_SHIFT 24
+
+#define SD_SPI_MODE 0x108
+#define SD_CE_ATA_1 0x10C
+
+#define SD_CE_ATA_2 0x10E
+#define SDCE_MISC_INT (1<<2)
+#define SDCE_MISC_INT_EN (1<<1)
+
+struct sdhci_pxa {
+ struct clk *clk_core;
+ struct clk *clk_io;
+ u8 power_mode;
+ void __iomem *sdio3_conf_reg;
+};
+
+/*
+ * These registers are relative to the second register region, for the
+ * MBus bridge.
+ */
+#define SDHCI_WINDOW_CTRL(i) (0x80 + ((i) << 3))
+#define SDHCI_WINDOW_BASE(i) (0x84 + ((i) << 3))
+#define SDHCI_MAX_WIN_NUM 8
+
+/*
+ * Fields below belong to SDIO3 Configuration Register (third register
+ * region for the Armada 38x flavor)
+ */
+
+#define SDIO3_CONF_CLK_INV BIT(0)
+#define SDIO3_CONF_SD_FB_CLK BIT(2)
+
+static int mv_conf_mbus_windows(struct platform_device *pdev,
+ const struct mbus_dram_target_info *dram)
+{
+ int i;
+ void __iomem *regs;
+ struct resource *res;
+
+ if (!dram) {
+ dev_err(&pdev->dev, "no mbus dram info\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ dev_err(&pdev->dev, "cannot get mbus registers\n");
+ return -EINVAL;
+ }
+
+ regs = ioremap(res->start, resource_size(res));
+ if (!regs) {
+ dev_err(&pdev->dev, "cannot map mbus registers\n");
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < SDHCI_MAX_WIN_NUM; i++) {
+ writel(0, regs + SDHCI_WINDOW_CTRL(i));
+ writel(0, regs + SDHCI_WINDOW_BASE(i));
+ }
+
+ for (i = 0; i < dram->num_cs; i++) {
+ const struct mbus_dram_window *cs = dram->cs + i;
+
+ /* Write size, attributes and target id to control register */
+ writel(((cs->size - 1) & 0xffff0000) |
+ (cs->mbus_attr << 8) |
+ (dram->mbus_dram_target_id << 4) | 1,
+ regs + SDHCI_WINDOW_CTRL(i));
+ /* Write base address to base register */
+ writel(cs->base, regs + SDHCI_WINDOW_BASE(i));
+ }
+
+ iounmap(regs);
+
+ return 0;
+}
+
+static int armada_38x_quirks(struct platform_device *pdev,
+ struct sdhci_host *host)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
+ struct resource *res;
+
+ host->quirks &= ~SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN;
+ host->quirks |= SDHCI_QUIRK_MISSING_CAPS;
+
+ host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
+ host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "conf-sdio3");
+ if (res) {
+ pxa->sdio3_conf_reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pxa->sdio3_conf_reg))
+ return PTR_ERR(pxa->sdio3_conf_reg);
+ } else {
+ /*
+ * According to erratum 'FE-2946959' both SDR50 and DDR50
+ * modes require specific clock adjustments in SDIO3
+ * Configuration register, if the adjustment is not done,
+ * remove them from the capabilities.
+ */
+ host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_DDR50);
+
+ dev_warn(&pdev->dev, "conf-sdio3 register not found: disabling SDR50 and DDR50 modes.\nConsider updating your dtb\n");
+ }
+
+ /*
+ * According to erratum 'ERR-7878951' Armada 38x SDHCI
+ * controller has different capabilities than the ones shown
+ * in its registers
+ */
+ if (of_property_read_bool(np, "no-1-8-v")) {
+ host->caps &= ~SDHCI_CAN_VDD_180;
+ host->mmc->caps &= ~MMC_CAP_1_8V_DDR;
+ } else {
+ host->caps &= ~SDHCI_CAN_VDD_330;
+ }
+ host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_USE_SDR50_TUNING);
+
+ return 0;
+}
+
+static void pxav3_reset(struct sdhci_host *host, u8 mask)
+{
+ struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc));
+ struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
+
+ sdhci_reset(host, mask);
+
+ if (mask == SDHCI_RESET_ALL) {
+ /*
+ * tune timing of read data/command when crc error happen
+ * no performance impact
+ */
+ if (pdata && 0 != pdata->clk_delay_cycles) {
+ u16 tmp;
+
+ tmp = readw(host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP);
+ tmp |= (pdata->clk_delay_cycles & SDCLK_DELAY_MASK)
+ << SDCLK_DELAY_SHIFT;
+ tmp |= SDCLK_SEL;
+ writew(tmp, host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP);
+ }
+ }
+}
+
+#define MAX_WAIT_COUNT 5
+static void pxav3_gen_init_74_clocks(struct sdhci_host *host, u8 power_mode)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
+ u16 tmp;
+ int count;
+
+ if (pxa->power_mode == MMC_POWER_UP
+ && power_mode == MMC_POWER_ON) {
+
+ dev_dbg(mmc_dev(host->mmc),
+ "%s: slot->power_mode = %d,"
+ "ios->power_mode = %d\n",
+ __func__,
+ pxa->power_mode,
+ power_mode);
+
+ /* set we want notice of when 74 clocks are sent */
+ tmp = readw(host->ioaddr + SD_CE_ATA_2);
+ tmp |= SDCE_MISC_INT_EN;
+ writew(tmp, host->ioaddr + SD_CE_ATA_2);
+
+ /* start sending the 74 clocks */
+ tmp = readw(host->ioaddr + SD_CFG_FIFO_PARAM);
+ tmp |= SDCFG_GEN_PAD_CLK_ON;
+ writew(tmp, host->ioaddr + SD_CFG_FIFO_PARAM);
+
+ /* slowest speed is about 100KHz or 10usec per clock */
+ udelay(740);
+ count = 0;
+
+ while (count++ < MAX_WAIT_COUNT) {
+ if ((readw(host->ioaddr + SD_CE_ATA_2)
+ & SDCE_MISC_INT) == 0)
+ break;
+ udelay(10);
+ }
+
+ if (count == MAX_WAIT_COUNT)
+ dev_warn(mmc_dev(host->mmc), "74 clock interrupt not cleared\n");
+
+ /* clear the interrupt bit if posted */
+ tmp = readw(host->ioaddr + SD_CE_ATA_2);
+ tmp |= SDCE_MISC_INT;
+ writew(tmp, host->ioaddr + SD_CE_ATA_2);
+ }
+ pxa->power_mode = power_mode;
+}
+
+static void pxav3_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
+ u16 ctrl_2;
+
+ /*
+ * Set V18_EN -- UHS modes do not work without this.
+ * does not change signaling voltage
+ */
+ ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+
+ /* Select Bus Speed Mode for host */
+ ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
+ switch (uhs) {
+ case MMC_TIMING_UHS_SDR12:
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
+ break;
+ case MMC_TIMING_UHS_SDR25:
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR50 | SDHCI_CTRL_VDD_180;
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR104 | SDHCI_CTRL_VDD_180;
+ break;
+ case MMC_TIMING_MMC_DDR52:
+ case MMC_TIMING_UHS_DDR50:
+ ctrl_2 |= SDHCI_CTRL_UHS_DDR50 | SDHCI_CTRL_VDD_180;
+ break;
+ }
+
+ /*
+ * Update SDIO3 Configuration register according to erratum
+ * FE-2946959
+ */
+ if (pxa->sdio3_conf_reg) {
+ u8 reg_val = readb(pxa->sdio3_conf_reg);
+
+ if (uhs == MMC_TIMING_UHS_SDR50 ||
+ uhs == MMC_TIMING_UHS_DDR50) {
+ reg_val &= ~SDIO3_CONF_CLK_INV;
+ reg_val |= SDIO3_CONF_SD_FB_CLK;
+ } else if (uhs == MMC_TIMING_MMC_HS) {
+ reg_val &= ~SDIO3_CONF_CLK_INV;
+ reg_val &= ~SDIO3_CONF_SD_FB_CLK;
+ } else {
+ reg_val |= SDIO3_CONF_CLK_INV;
+ reg_val &= ~SDIO3_CONF_SD_FB_CLK;
+ }
+ writeb(reg_val, pxa->sdio3_conf_reg);
+ }
+
+ sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+ dev_dbg(mmc_dev(host->mmc),
+ "%s uhs = %d, ctrl_2 = %04X\n",
+ __func__, uhs, ctrl_2);
+}
+
+static void pxav3_set_power(struct sdhci_host *host, unsigned char mode,
+ unsigned short vdd)
+{
+ struct mmc_host *mmc = host->mmc;
+ u8 pwr = host->pwr;
+
+ sdhci_set_power_noreg(host, mode, vdd);
+
+ if (host->pwr == pwr)
+ return;
+
+ if (host->pwr == 0)
+ vdd = 0;
+
+ if (!IS_ERR(mmc->supply.vmmc))
+ mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
+}
+
+static const struct sdhci_ops pxav3_sdhci_ops = {
+ .set_clock = sdhci_set_clock,
+ .set_power = pxav3_set_power,
+ .platform_send_init_74_clocks = pxav3_gen_init_74_clocks,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = pxav3_reset,
+ .set_uhs_signaling = pxav3_set_uhs_signaling,
+};
+
+static const struct sdhci_pltfm_data sdhci_pxav3_pdata = {
+ .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK
+ | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
+ | SDHCI_QUIRK_32BIT_ADMA_SIZE
+ | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+ .ops = &pxav3_sdhci_ops,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id sdhci_pxav3_of_match[] = {
+ {
+ .compatible = "mrvl,pxav3-mmc",
+ },
+ {
+ .compatible = "marvell,armada-380-sdhci",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sdhci_pxav3_of_match);
+
+static struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev)
+{
+ struct sdhci_pxa_platdata *pdata;
+ struct device_node *np = dev->of_node;
+ u32 clk_delay_cycles;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ if (!of_property_read_u32(np, "mrvl,clk-delay-cycles",
+ &clk_delay_cycles))
+ pdata->clk_delay_cycles = clk_delay_cycles;
+
+ return pdata;
+}
+#else
+static inline struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
+static int sdhci_pxav3_probe(struct platform_device *pdev)
+{
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = pdev->dev.of_node;
+ struct sdhci_host *host = NULL;
+ struct sdhci_pxa *pxa = NULL;
+ const struct of_device_id *match;
+ int ret;
+
+ host = sdhci_pltfm_init(pdev, &sdhci_pxav3_pdata, sizeof(*pxa));
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ pltfm_host = sdhci_priv(host);
+ pxa = sdhci_pltfm_priv(pltfm_host);
+
+ pxa->clk_io = devm_clk_get(dev, "io");
+ if (IS_ERR(pxa->clk_io))
+ pxa->clk_io = devm_clk_get(dev, NULL);
+ if (IS_ERR(pxa->clk_io)) {
+ dev_err(dev, "failed to get io clock\n");
+ ret = PTR_ERR(pxa->clk_io);
+ goto err_clk_get;
+ }
+ pltfm_host->clk = pxa->clk_io;
+ clk_prepare_enable(pxa->clk_io);
+
+ pxa->clk_core = devm_clk_get(dev, "core");
+ if (!IS_ERR(pxa->clk_core))
+ clk_prepare_enable(pxa->clk_core);
+
+ /* enable 1/8V DDR capable */
+ host->mmc->caps |= MMC_CAP_1_8V_DDR;
+
+ if (of_device_is_compatible(np, "marvell,armada-380-sdhci")) {
+ ret = armada_38x_quirks(pdev, host);
+ if (ret < 0)
+ goto err_mbus_win;
+ ret = mv_conf_mbus_windows(pdev, mv_mbus_dram_info());
+ if (ret < 0)
+ goto err_mbus_win;
+ }
+
+ match = of_match_device(of_match_ptr(sdhci_pxav3_of_match), &pdev->dev);
+ if (match) {
+ ret = mmc_of_parse(host->mmc);
+ if (ret)
+ goto err_of_parse;
+ sdhci_get_of_property(pdev);
+ pdata = pxav3_get_mmc_pdata(dev);
+ pdev->dev.platform_data = pdata;
+ } else if (pdata) {
+ /* on-chip device */
+ if (pdata->flags & PXA_FLAG_CARD_PERMANENT)
+ host->mmc->caps |= MMC_CAP_NONREMOVABLE;
+
+ /* If slot design supports 8 bit data, indicate this to MMC. */
+ if (pdata->flags & PXA_FLAG_SD_8_BIT_CAPABLE_SLOT)
+ host->mmc->caps |= MMC_CAP_8_BIT_DATA;
+
+ if (pdata->quirks)
+ host->quirks |= pdata->quirks;
+ if (pdata->quirks2)
+ host->quirks2 |= pdata->quirks2;
+ if (pdata->host_caps)
+ host->mmc->caps |= pdata->host_caps;
+ if (pdata->host_caps2)
+ host->mmc->caps2 |= pdata->host_caps2;
+ if (pdata->pm_caps)
+ host->mmc->pm_caps |= pdata->pm_caps;
+ }
+
+ pm_runtime_get_noresume(&pdev->dev);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, PXAV3_RPM_DELAY_MS);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_suspend_ignore_children(&pdev->dev, 1);
+
+ ret = sdhci_add_host(host);
+ if (ret)
+ goto err_add_host;
+
+ if (host->mmc->pm_caps & MMC_PM_WAKE_SDIO_IRQ)
+ device_init_wakeup(&pdev->dev, 1);
+
+ pm_runtime_put_autosuspend(&pdev->dev);
+
+ return 0;
+
+err_add_host:
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+err_of_parse:
+err_mbus_win:
+ clk_disable_unprepare(pxa->clk_io);
+ clk_disable_unprepare(pxa->clk_core);
+err_clk_get:
+ sdhci_pltfm_free(pdev);
+ return ret;
+}
+
+static int sdhci_pxav3_remove(struct platform_device *pdev)
+{
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
+
+ pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+
+ sdhci_remove_host(host, 1);
+
+ clk_disable_unprepare(pxa->clk_io);
+ clk_disable_unprepare(pxa->clk_core);
+
+ sdhci_pltfm_free(pdev);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sdhci_pxav3_suspend(struct device *dev)
+{
+ int ret;
+ struct sdhci_host *host = dev_get_drvdata(dev);
+
+ pm_runtime_get_sync(dev);
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+ ret = sdhci_suspend_host(host);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+ return ret;
+}
+
+static int sdhci_pxav3_resume(struct device *dev)
+{
+ int ret;
+ struct sdhci_host *host = dev_get_drvdata(dev);
+
+ pm_runtime_get_sync(dev);
+ ret = sdhci_resume_host(host);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int sdhci_pxav3_runtime_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
+ int ret;
+
+ ret = sdhci_runtime_suspend_host(host);
+ if (ret)
+ return ret;
+
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+
+ clk_disable_unprepare(pxa->clk_io);
+ if (!IS_ERR(pxa->clk_core))
+ clk_disable_unprepare(pxa->clk_core);
+
+ return 0;
+}
+
+static int sdhci_pxav3_runtime_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
+
+ clk_prepare_enable(pxa->clk_io);
+ if (!IS_ERR(pxa->clk_core))
+ clk_prepare_enable(pxa->clk_core);
+
+ return sdhci_runtime_resume_host(host, 0);
+}
+#endif
+
+static const struct dev_pm_ops sdhci_pxav3_pmops = {
+ SET_SYSTEM_SLEEP_PM_OPS(sdhci_pxav3_suspend, sdhci_pxav3_resume)
+ SET_RUNTIME_PM_OPS(sdhci_pxav3_runtime_suspend,
+ sdhci_pxav3_runtime_resume, NULL)
+};
+
+static struct platform_driver sdhci_pxav3_driver = {
+ .driver = {
+ .name = "sdhci-pxav3",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ .of_match_table = of_match_ptr(sdhci_pxav3_of_match),
+ .pm = &sdhci_pxav3_pmops,
+ },
+ .probe = sdhci_pxav3_probe,
+ .remove = sdhci_pxav3_remove,
+};
+
+module_platform_driver(sdhci_pxav3_driver);
+
+MODULE_DESCRIPTION("SDHCI driver for pxav3");
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_LICENSE("GPL v2");
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 14:12:56 +0000