SDHCI driver for pxa910 SoCs, the driver based on sdhci-pltfm to handle resource etc.
Signed-off-by: Zhangfei Gao <zhangfei.gao@xxxxxxxxxxx>
Signed-off-by: Jun Nie <njun@xxxxxxxxxxx>
Signed-off-by: Qiming Wu <wuqm@xxxxxxxxxxx>
---
drivers/mmc/host/Kconfig | 13 ++
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sdhci-pxa910.c | 297 +++++++++++++++++++++++++++++++++++++++
3 files changed, 311 insertions(+), 0 deletions(-)
create mode 100644 drivers/mmc/host/sdhci-pxa910.c
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 513df18..865dc86 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -194,6 +194,19 @@ config MMC_SDHCI_MMP2
If unsure, say N.
+config MMC_SDHCI_PXA910
+ tristate "Marvell PXA910 SD Host Controller support"
+ depends on ARCH_MMP
+ select MMC_SDHCI
+ select MMC_SDHCI_PLTFM
+ select MMC_SDHCI_IO_ACCESSORS
+ help
+ This selects the Marvell(R) PXA910 SD Host Controller.
+ If you have a PXA910 platform with SD Host Controller
+ and a card slot, say Y or M here.
+
+ If unsure, say N.
+
config MMC_SDHCI_SPEAR
tristate "SDHCI support on ST SPEAr platform"
depends on MMC_SDHCI && PLAT_SPEAR
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index f8650e0..5b75609 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_MMC_MXS) += mxs-mmc.o
obj-$(CONFIG_MMC_SDHCI) += sdhci.o
obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
obj-$(CONFIG_MMC_SDHCI_MMP2) += sdhci-mmp2.o
+obj-$(CONFIG_MMC_SDHCI_PXA910) += sdhci-pxa910.o
obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
diff --git a/drivers/mmc/host/sdhci-pxa910.c b/drivers/mmc/host/sdhci-pxa910.c
new file mode 100644
index 0000000..56ef328
--- /dev/null
+++ b/drivers/mmc/host/sdhci-pxa910.c
@@ -0,0 +1,297 @@
+/*
+ * Copyright (C) 2010 Marvell International Ltd.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <plat/sdhci.h>
+#include <linux/slab.h>
+#include "sdhci.h"
+#include "sdhci-pltfm.h"
+
+#define SD_FIFO_PARAM 0xe0
+#define DIS_PAD_SD_CLK_GATE 0x0400 /* Turn on/off Dynamic SD Clock Gating */
+#define CLK_GATE_ON 0x0200 /* Disable/enable Clock Gate */
+#define CLK_GATE_CTL 0x0100 /* Clock Gate Control */
+#define CLK_GATE_SETTING_BITS (DIS_PAD_SD_CLK_GATE | \
+ CLK_GATE_ON | CLK_GATE_CTL)
+
+#define SD_CLOCK_AND_BURST_SIZE_SETUP 0xe6
+#define SDCLK_SEL_SHIFT 8
+#define SDCLK_SEL_MASK 0x3
+#define SDCLK_DELAY_SHIFT 10
+#define SDCLK_DELAY_MASK 0x3c
+
+#define SDHCI_HOST_CONTROL 0x28
+#define SDHCI_CTRL_4BITBUS 0x02
+
+#define SD_CE_ATA_2 0xea
+#define MMC_CARD 0x1000
+#define MMC_WIDTH 0x0100
+
+static void pxa910_sdh_specific_ctrl(struct sdhci_host *host,
+ struct sdhci_pxa_platdata *pdata)
+{
+ u16 tmp = 0;
+
+ /*
+ * tune timing of read data/command when crc error happen
+ * no performance impact
+ */
+ if (pdata->clk_delay_sel == 1) {
+ tmp = readw(host->ioaddr + SD_CLOCK_AND_BURST_SIZE_SETUP);
+
+ tmp &= ~(SDCLK_DELAY_MASK << SDCLK_DELAY_SHIFT);
+ tmp |= (pdata->clk_delay_cycles & SDCLK_DELAY_MASK)
+ << SDCLK_DELAY_SHIFT;
+ tmp &= ~(SDCLK_SEL_MASK << SDCLK_SEL_SHIFT);
+ tmp |= (1 & SDCLK_SEL_MASK) << SDCLK_SEL_SHIFT;
+
+ writew(tmp, host->ioaddr + SD_CLOCK_AND_BURST_SIZE_SETUP);
+ }
+
+ if (pdata->flags & PXA_FLAG_DISABLE_CLOCK_GATING) {
+ tmp = readw(host->ioaddr + SD_FIFO_PARAM);
+ tmp &= ~CLK_GATE_SETTING_BITS;
+ tmp |= CLK_GATE_SETTING_BITS;
+ writew(tmp, host->ioaddr + SD_FIFO_PARAM);
+ }
+}
+
+static int pxa910_mmc_set_width(struct sdhci_host *host, int width)
+{
+ u8 ctrl;
+ u16 tmp;
+
+ ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
+ tmp = readw(host->ioaddr + SD_CE_ATA_2);
+ if (width == MMC_BUS_WIDTH_8) {
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+ tmp |= MMC_CARD | MMC_WIDTH;
+ } else {
+ tmp &= ~(MMC_CARD | MMC_WIDTH);
+ if (width == MMC_BUS_WIDTH_4)
+ ctrl |= SDHCI_CTRL_4BITBUS;
+ else
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+ }
+ writew(tmp, host->ioaddr + SD_CE_ATA_2);
+ writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
+
+ return 0;
+}
+
+static unsigned int pxa910_get_ro(struct sdhci_host *host)
+{
+ /* Micro SD does not support write-protect feature */
+ return 0;
+}
+
+static void pxa910_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = pltfm_host->priv;
+
+ if (clock)
+ pxa910_sdh_specific_ctrl(host, pxa->pdata);
+}
+
+static u32 pxa910_get_max_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = pltfm_host->priv;
+
+ return clk_get_rate(pxa->clk);
+}
+
+static int __devinit sdhci_pxa910_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 sdhci_host *host = NULL;
+ struct sdhci_pxa *pxa = NULL;
+ int ret;
+ struct clk *clk;
+
+ pxa = kzalloc(sizeof(struct sdhci_pxa), GFP_KERNEL);
+ if (!pxa) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ pxa->ops = kzalloc(sizeof(struct sdhci_ops), GFP_KERNEL);
+ if (!pxa->ops) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ pxa->pdata = pdata;
+
+ clk = clk_get(dev, "PXA-SDHCLK");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "failed to get io clock\n");
+ ret = PTR_ERR(clk);
+ goto out;
+ }
+ pxa->clk = clk;
+ clk_enable(clk);
+
+ host = sdhci_pltfm_init(pdev, NULL);
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ pltfm_host = sdhci_priv(host);
+ pltfm_host->priv = pxa;
+
+ host->quirks = SDHCI_QUIRK_BROKEN_ADMA
+ | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
+ | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN;
+
+ if (pdata && pdata->flags & PXA_FLAG_CARD_PERMANENT) {
+ /* on-chip device */
+ host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+ 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 && pdata->quirks)
+ host->quirks |= pdata->quirks;
+ if (pdata && pdata->host_caps)
+ host->mmc->caps |= pdata->host_caps;
+ if (pdata && pdata->pm_caps)
+ host->mmc->pm_caps |= pdata->pm_caps;
+
+ pxa->ops->get_max_clock = pxa910_get_max_clock;
+ pxa->ops->set_clock = pxa910_set_clock;
+ pxa->ops->platform_8bit_width = pxa910_mmc_set_width;
+ if (pdata && pdata->flags & PXA_FLAG_CARD_NO_WP)
+ pxa->ops->get_ro = pxa910_get_ro;
+
+ host->ops = pxa->ops;
+
+ ret = sdhci_add_host(host);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add host\n");
+ goto out;
+ }
+
+ if (pxa->pdata->max_speed) {
+ host->mmc->f_max = pxa->pdata->max_speed;
+ if (!(host->mmc->f_max > 25000000))
+ host->mmc->caps &= ~(MMC_CAP_SD_HIGHSPEED |
+ MMC_CAP_MMC_HIGHSPEED);
+ }
+
+ platform_set_drvdata(pdev, host);
+
+ return 0;
+out:
+ if (host) {
+ clk_disable(pltfm_host->clk);
+ clk_put(pltfm_host->clk);
+ sdhci_pltfm_free(pdev);
+ }
+
+ if (pxa)
+ kfree(pxa->ops);
+ kfree(pxa);
+
+ return ret;
+}
+
+static int __devexit sdhci_pxa910_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 = pltfm_host->priv;
+ int dead = 0;
+ u32 scratch;
+
+ if (host) {
+ scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
+ if (scratch == (u32)-1)
+ dead = 1;
+
+ sdhci_remove_host(host, dead);
+
+ clk_disable(pxa->clk);
+ clk_put(pxa->clk);
+ sdhci_pltfm_free(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+ }
+
+ if (pxa)
+ kfree(pxa->ops);
+ kfree(pxa);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int sdhci_pxa910_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct sdhci_host *host = platform_get_drvdata(dev);
+
+ return sdhci_suspend_host(host, state);
+}
+
+static int sdhci_pxa910_resume(struct platform_device *dev)
+{
+ struct sdhci_host *host = platform_get_drvdata(dev);
+
+ return sdhci_resume_host(host);
+}
+#else
+#define sdhci_pxa910_suspend NULL
+#define sdhci_pxa910_resume NULL
+#endif
+
+
+static struct platform_driver sdhci_pxa910_driver = {
+ .driver = {
+ .name = "sdhci-pxa910",
+ .owner = THIS_MODULE,
+ },
+ .probe = sdhci_pxa910_probe,
+ .remove = __devexit_p(sdhci_pxa910_remove),
+#ifdef CONFIG_PM
+ .suspend = sdhci_pxa910_suspend,
+ .resume = sdhci_pxa910_resume,
+#endif
+};
+static int __init sdhci_pxa910_init(void)
+{
+ return platform_driver_register(&sdhci_pxa910_driver);
+}
+
+static void __exit sdhci_pxa910_exit(void)
+{
+ platform_driver_unregister(&sdhci_pxa910_driver);
+}
+
+module_init(sdhci_pxa910_init);
+module_exit(sdhci_pxa910_exit);
+
+MODULE_DESCRIPTION("SDHCI driver for pxa910");
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_LICENSE("GPL v2");
+
--
1.7.0.4
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