mmc: sdhci-sirf: add mmc host sdhci-pltfm based driver for SiRF SoCs
This patch adds the new driver for CSR SiRF SoCs: SiRFprimaII: unicore ARM Cortex-A9 SiRFatlas6: unicore ARM Cortex-A9 SiRFmarco: dual core ARM Cortex-A9 SMP Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Bin Shi <Bin.Shi@csr.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Chris Ball <cjb@laptop.org>hifive-unleashed-5.1
Barry Song
Chris Ball
parent
ef3a69c7a4
commit
b3b665b0a9
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@ -0,0 +1,18 @@
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* SiRFprimII/marco/atlas6 SDHCI Controller
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This file documents differences between the core properties in mmc.txt
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and the properties used by the sdhci-sirf driver.
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Required properties:
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- compatible: sirf,prima2-sdhc
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Optional properties:
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- cd-gpios: card detect gpio, with zero flags.
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Example:
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sd0: sdhci@56000000 {
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compatible = "sirf,prima2-sdhc";
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reg = <0xcd000000 0x100000>;
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cd-gpios = <&gpio 6 0>;
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};
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@ -805,6 +805,7 @@ S: Maintained
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F: arch/arm/mach-prima2/
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F: drivers/dma/sirf-dma.c
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F: drivers/i2c/busses/i2c-sirf.c
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F: drivers/mmc/host/sdhci-sirf.c
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F: drivers/pinctrl/pinctrl-sirf.c
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F: drivers/spi/spi-sirf.c
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@ -190,6 +190,17 @@ config MMC_SDHCI_S3C
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If unsure, say N.
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config MMC_SDHCI_SIRF
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tristate "SDHCI support on CSR SiRFprimaII and SiRFmarco SoCs"
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depends on ARCH_SIRF
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depends on MMC_SDHCI_PLTFM
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help
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This selects the SDHCI support for SiRF System-on-Chip devices.
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If you have a controller with this interface, say Y or M here.
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If unsure, say N.
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config MMC_SDHCI_PXAV3
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tristate "Marvell MMP2 SD Host Controller support (PXAV3)"
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depends on CLKDEV_LOOKUP
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@ -13,6 +13,7 @@ obj-$(CONFIG_MMC_SDHCI_ACPI) += sdhci-acpi.o
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obj-$(CONFIG_MMC_SDHCI_PXAV3) += sdhci-pxav3.o
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obj-$(CONFIG_MMC_SDHCI_PXAV2) += sdhci-pxav2.o
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obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
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obj-$(CONFIG_MMC_SDHCI_SIRF) += sdhci-sirf.o
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obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
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obj-$(CONFIG_MMC_WBSD) += wbsd.o
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obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
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@ -0,0 +1,193 @@
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/*
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* SDHCI support for SiRF primaII and marco SoCs
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*
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* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
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*
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* Licensed under GPLv2 or later.
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/mmc/host.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/mmc/slot-gpio.h>
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#include <linux/pinctrl/consumer.h>
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#include "sdhci-pltfm.h"
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struct sdhci_sirf_priv {
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struct clk *clk;
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int gpio_cd;
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};
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static unsigned int sdhci_sirf_get_max_clk(struct sdhci_host *host)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_sirf_priv *priv = pltfm_host->priv;
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return clk_get_rate(priv->clk);
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}
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static struct sdhci_ops sdhci_sirf_ops = {
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.get_max_clock = sdhci_sirf_get_max_clk,
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};
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static struct sdhci_pltfm_data sdhci_sirf_pdata = {
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.ops = &sdhci_sirf_ops,
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.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
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SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
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SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
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SDHCI_QUIRK_INVERTED_WRITE_PROTECT |
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SDHCI_QUIRK_DELAY_AFTER_POWER,
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};
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static int sdhci_sirf_probe(struct platform_device *pdev)
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{
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struct sdhci_host *host;
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struct sdhci_pltfm_host *pltfm_host;
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struct sdhci_sirf_priv *priv;
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struct pinctrl *pinctrl;
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int ret;
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pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
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if (IS_ERR(pinctrl)) {
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dev_err(&pdev->dev, "unable to get pinmux");
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return PTR_ERR(pinctrl);
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}
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priv = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_sirf_priv),
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GFP_KERNEL);
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if (!priv) {
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dev_err(&pdev->dev, "unable to allocate private data");
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return -ENOMEM;
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}
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priv->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(priv->clk)) {
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dev_err(&pdev->dev, "unable to get clock");
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return PTR_ERR(priv->clk);
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}
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if (pdev->dev.of_node) {
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priv->gpio_cd = of_get_named_gpio(pdev->dev.of_node,
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"cd-gpios", 0);
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} else {
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priv->gpio_cd = -EINVAL;
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}
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host = sdhci_pltfm_init(pdev, &sdhci_sirf_pdata);
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if (IS_ERR(host)) {
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ret = PTR_ERR(host);
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goto err_sdhci_pltfm_init;
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}
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pltfm_host = sdhci_priv(host);
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pltfm_host->priv = priv;
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sdhci_get_of_property(pdev);
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clk_prepare_enable(priv->clk);
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ret = sdhci_add_host(host);
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if (ret)
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goto err_sdhci_add;
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/*
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* We must request the IRQ after sdhci_add_host(), as the tasklet only
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* gets setup in sdhci_add_host() and we oops.
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*/
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if (gpio_is_valid(priv->gpio_cd)) {
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ret = mmc_gpio_request_cd(host->mmc, priv->gpio_cd);
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if (ret) {
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dev_err(&pdev->dev, "card detect irq request failed: %d\n",
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ret);
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goto err_request_cd;
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}
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}
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return 0;
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err_request_cd:
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sdhci_remove_host(host, 0);
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err_sdhci_add:
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clk_disable_unprepare(priv->clk);
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sdhci_pltfm_free(pdev);
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err_sdhci_pltfm_init:
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return ret;
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}
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static int sdhci_sirf_remove(struct platform_device *pdev)
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{
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struct sdhci_host *host = platform_get_drvdata(pdev);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_sirf_priv *priv = pltfm_host->priv;
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sdhci_pltfm_unregister(pdev);
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if (gpio_is_valid(priv->gpio_cd))
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mmc_gpio_free_cd(host->mmc);
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clk_disable_unprepare(priv->clk);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int sdhci_sirf_suspend(struct device *dev)
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{
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struct sdhci_host *host = dev_get_drvdata(dev);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_sirf_priv *priv = pltfm_host->priv;
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int ret;
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ret = sdhci_suspend_host(host);
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if (ret)
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return ret;
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clk_disable(priv->clk);
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return 0;
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}
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static int sdhci_sirf_resume(struct device *dev)
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{
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struct sdhci_host *host = dev_get_drvdata(dev);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_sirf_priv *priv = pltfm_host->priv;
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int ret;
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ret = clk_enable(priv->clk);
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if (ret) {
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dev_dbg(dev, "Resume: Error enabling clock\n");
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return ret;
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}
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return sdhci_resume_host(host);
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}
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static SIMPLE_DEV_PM_OPS(sdhci_sirf_pm_ops, sdhci_sirf_suspend, sdhci_sirf_resume);
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#endif
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static const struct of_device_id sdhci_sirf_of_match[] = {
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{ .compatible = "sirf,prima2-sdhc" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, sdhci_sirf_of_match);
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static struct platform_driver sdhci_sirf_driver = {
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.driver = {
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.name = "sdhci-sirf",
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.owner = THIS_MODULE,
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.of_match_table = sdhci_sirf_of_match,
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#ifdef CONFIG_PM_SLEEP
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.pm = &sdhci_sirf_pm_ops,
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#endif
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},
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.probe = sdhci_sirf_probe,
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.remove = sdhci_sirf_remove,
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};
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module_platform_driver(sdhci_sirf_driver);
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MODULE_DESCRIPTION("SDHCI driver for SiRFprimaII/SiRFmarco");
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MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
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MODULE_LICENSE("GPL v2");
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