[PATCH v2 5/7] mmc: sdhci: consolidate sdhci-of-esdhc and sdhci-esdhc-imx
Shawn Guo
shawn.guo at linaro.org
Thu May 5 23:22:56 EST 2011
This patch is to consolidate SDHCI driver for Freescale eSDHC
controller found on both MPCxxx and i.MX platforms. It merges
sdhci-of-esdhc.c into sdhci-esdhc.c, so that the same pair of
.probe/.remove hook works with eSDHC for two platforms.
As the results, sdhci-of-esdhc.c and sdhci-esdhc.h are removed, and
header esdhc.h containing the definition of esdhc_platform_data is
put into the public folder.
Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
drivers/mmc/host/Kconfig | 38 ++++---
drivers/mmc/host/Makefile | 3 +-
drivers/mmc/host/sdhci-esdhc.c | 244 +++++++++++++++++++++++++++++++++----
drivers/mmc/host/sdhci-esdhc.h | 81 ------------
drivers/mmc/host/sdhci-of-esdhc.c | 142 ---------------------
include/linux/mmc/esdhc.h | 27 ++++
6 files changed, 273 insertions(+), 262 deletions(-)
delete mode 100644 drivers/mmc/host/sdhci-esdhc.h
delete mode 100644 drivers/mmc/host/sdhci-of-esdhc.c
create mode 100644 include/linux/mmc/esdhc.h
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index fdd20ad..e32cb76 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -81,17 +81,6 @@ config MMC_RICOH_MMC
If unsure, say Y.
-config MMC_SDHCI_OF_ESDHC
- bool "SDHCI OF support for the Freescale eSDHC controller"
- depends on MMC_SDHCI
- depends on PPC_OF
- select MMC_SDHCI_PLTFM
- select MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
- help
- This selects the Freescale eSDHC controller support.
-
- If unsure, say N.
-
config MMC_SDHCI_OF_HLWD
bool "SDHCI OF support for the Nintendo Wii SDHCI controllers"
depends on MMC_SDHCI
@@ -122,15 +111,34 @@ config MMC_SDHCI_CNS3XXX
If unsure, say N.
+config MMC_SDHCI_ESDHC
+ bool
+ depends on MMC_SDHCI
+ select MMC_SDHCI_PLTFM
+ help
+ This selects SDHCI driver for Freescale eSDHC controller.
+
+config MMC_SDHCI_ESDHC_MPC
+ bool "SDHCI support for the Freescale eSDHC MPC controller"
+ depends on MMC_SDHCI
+ depends on PPC_OF && PPC_CLOCK
+ select MMC_SDHCI_ESDHC
+ select MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
+ help
+ This selects the Freescale eSDHC controller support on the
+ MPC platforms.
+
+ If unsure, say N.
+
config MMC_SDHCI_ESDHC_IMX
- tristate "SDHCI platform support for the Freescale eSDHC i.MX controller"
+ tristate "SDHCI support for the Freescale eSDHC i.MX controller"
depends on ARCH_MX25 || ARCH_MX35 || ARCH_MX5
depends on MMC_SDHCI
- select MMC_SDHCI_PLTFM
+ select MMC_SDHCI_ESDHC
select MMC_SDHCI_IO_ACCESSORS
help
- This selects the Freescale eSDHC controller support on the platform
- bus, found on platforms like mx35/51.
+ This selects the Freescale eSDHC controller support on platforms
+ like mx25/mx35/mx5x.
If unsure, say N.
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 186f0ed..a3f1df8 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -45,10 +45,9 @@ obj-$(CONFIG_MMC_USHC) += ushc.o
obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o
obj-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o
-obj-$(CONFIG_MMC_SDHCI_ESDHC_IMX) += sdhci-esdhc.o
+obj-$(CONFIG_MMC_SDHCI_ESDHC) += sdhci-esdhc.o
obj-$(CONFIG_MMC_SDHCI_DOVE) += sdhci-dove.o
obj-$(CONFIG_MMC_SDHCI_TEGRA) += sdhci-tegra.o
-obj-$(CONFIG_MMC_SDHCI_OF_ESDHC) += sdhci-of-esdhc.o
obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o
ifeq ($(CONFIG_CB710_DEBUG),y)
diff --git a/drivers/mmc/host/sdhci-esdhc.c b/drivers/mmc/host/sdhci-esdhc.c
index 8da57d4..f3b4ff5 100644
--- a/drivers/mmc/host/sdhci-esdhc.c
+++ b/drivers/mmc/host/sdhci-esdhc.c
@@ -1,7 +1,11 @@
/*
- * Freescale eSDHC i.MX controller driver for the platform bus.
+ * Freescale eSDHC i.MX controller driver for MPCxxx and i.MX.
*
- * derived from the OF-version.
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ * Author: Xiaobo Xie <X.Xie at freescale.com>
+ *
+ * Copyright (c) 2009 MontaVista Software, Inc.
+ * Author: Anton Vorontsov <avorontsov at ru.mvista.com>
*
* Copyright (c) 2010 Pengutronix e.K.
* Author: Wolfram Sang <w.sang at pengutronix.de>
@@ -21,11 +25,40 @@
#include <linux/mmc/sdhci-pltfm.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sdio.h>
+#include <linux/mmc/esdhc.h>
+#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
#include <mach/hardware.h>
-#include <mach/esdhc.h>
+#endif
#include "sdhci.h"
#include "sdhci-pltfm.h"
-#include "sdhci-esdhc.h"
+
+/*
+ * Ops and quirks for the Freescale eSDHC controller.
+ */
+
+#define ESDHC_DEFAULT_QUIRKS (SDHCI_QUIRK_FORCE_BLK_SZ_2048 | \
+ SDHCI_QUIRK_NO_BUSY_IRQ | \
+ SDHCI_QUIRK_NONSTANDARD_CLOCK | \
+ SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | \
+ SDHCI_QUIRK_PIO_NEEDS_DELAY | \
+ SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
+
+#define ESDHC_SYSTEM_CONTROL 0x2c
+#define ESDHC_CLOCK_MASK 0x0000fff0
+#define ESDHC_PREDIV_SHIFT 8
+#define ESDHC_DIVIDER_SHIFT 4
+#define ESDHC_CLOCK_PEREN 0x00000004
+#define ESDHC_CLOCK_HCKEN 0x00000002
+#define ESDHC_CLOCK_IPGEN 0x00000001
+
+/* OF-specific */
+#define ESDHC_DMA_SYSCTL 0x40c
+#define ESDHC_DMA_SNOOP 0x00000040
+
+#define ESDHC_HOST_CONTROL_RES 0x05
+
+/* pltfm-specific */
+#define ESDHC_HOST_CONTROL_LE 0x20
/* VENDOR SPEC register */
#define SDHCI_VENDOR_SPEC 0xC0
@@ -50,6 +83,117 @@ struct pltfm_imx_data {
u32 scratchpad;
};
+static inline void esdhc_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+ int pre_div = 2;
+ int div = 1;
+ u32 temp;
+
+ temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
+ temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
+ | ESDHC_CLOCK_MASK);
+ sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
+
+ if (clock == 0)
+ goto out;
+
+ while (host->max_clk / pre_div / 16 > clock && pre_div < 256)
+ pre_div *= 2;
+
+ while (host->max_clk / pre_div / div > clock && div < 16)
+ div++;
+
+ dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
+ clock, host->max_clk / pre_div / div);
+
+ pre_div >>= 1;
+ div--;
+
+ temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
+ temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
+ | (div << ESDHC_DIVIDER_SHIFT)
+ | (pre_div << ESDHC_PREDIV_SHIFT));
+ sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
+ mdelay(100);
+out:
+ host->clock = clock;
+}
+
+#ifdef CONFIG_MMC_SDHCI_ESDHC_MPC
+static u16 esdhc_readw(struct sdhci_host *host, int reg)
+{
+ u16 ret;
+
+ if (unlikely(reg == SDHCI_HOST_VERSION))
+ ret = in_be16(host->ioaddr + reg);
+ else
+ ret = sdhci_be32bs_readw(host, reg);
+ return ret;
+}
+
+static void esdhc_writew(struct sdhci_host *host, u16 val, int reg)
+{
+ if (reg == SDHCI_BLOCK_SIZE) {
+ /*
+ * Two last DMA bits are reserved, and first one is used for
+ * non-standard blksz of 4096 bytes that we don't support
+ * yet. So clear the DMA boundary bits.
+ */
+ val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
+ }
+ sdhci_be32bs_writew(host, val, reg);
+}
+
+static void esdhc_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+ /* Prevent SDHCI core from writing reserved bits (e.g. HISPD). */
+ if (reg == SDHCI_HOST_CONTROL)
+ val &= ~ESDHC_HOST_CONTROL_RES;
+ sdhci_be32bs_writeb(host, val, reg);
+}
+
+static int esdhc_of_enable_dma(struct sdhci_host *host)
+{
+ setbits32(host->ioaddr + ESDHC_DMA_SYSCTL, ESDHC_DMA_SNOOP);
+ return 0;
+}
+
+static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+ return pltfm_host->clock;
+}
+
+static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+ return pltfm_host->clock / 256 / 16;
+}
+
+static struct sdhci_ops sdhci_esdhc_mpc_ops = {
+ .read_l = sdhci_be32bs_readl,
+ .read_w = esdhc_readw,
+ .read_b = sdhci_be32bs_readb,
+ .write_l = sdhci_be32bs_writel,
+ .write_w = esdhc_writew,
+ .write_b = esdhc_writeb,
+ .set_clock = esdhc_set_clock,
+ .enable_dma = esdhc_of_enable_dma,
+ .get_max_clock = esdhc_of_get_max_clock,
+ .get_min_clock = esdhc_of_get_min_clock,
+};
+
+static struct sdhci_pltfm_data sdhci_esdhc_mpc_pdata = {
+ /* card detection could be handled via GPIO */
+ .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
+ | SDHCI_QUIRK_NO_CARD_NO_RESET,
+ .ops = &sdhci_esdhc_mpc_ops,
+};
+#endif /* CONFIG_MMC_SDHCI_ESDHC_MPC */
+
+#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
{
void __iomem *base = host->ioaddr + (reg & ~0x3);
@@ -191,7 +335,7 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
return clk_get_rate(pltfm_host->clk) / 256 / 16;
}
-static struct sdhci_ops sdhci_esdhc_ops = {
+static struct sdhci_ops sdhci_esdhc_imx_ops = {
.read_l = esdhc_readl_le,
.read_w = esdhc_readw_le,
.write_l = esdhc_writel_le,
@@ -206,8 +350,35 @@ static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_ADMA
| SDHCI_QUIRK_BROKEN_CARD_DETECTION,
/* ADMA has issues. Might be fixable */
- .ops = &sdhci_esdhc_ops,
+ .ops = &sdhci_esdhc_imx_ops,
+};
+#endif /* CONFIG_MMC_SDHCI_ESDHC_IMX */
+
+#ifdef CONFIG_OF
+#include <linux/of_device.h>
+static const struct of_device_id sdhci_esdhc_dt_ids[] = {
+#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
+ { .compatible = "fsl,imx-esdhc", .data = &sdhci_esdhc_imx_pdata },
+#endif
+#ifdef CONFIG_MMC_SDHCI_ESDHC_MPC
+ { .compatible = "fsl,mpc8379-esdhc", .data = &sdhci_esdhc_mpc_pdata },
+ { .compatible = "fsl,mpc8536-esdhc", .data = &sdhci_esdhc_mpc_pdata },
+ { .compatible = "fsl,esdhc", .data = &sdhci_esdhc_mpc_pdata },
+#endif
+ { }
};
+MODULE_DEVICE_TABLE(platform, sdhci_esdhc_dt_ids);
+#else
+#define sdhci_esdhc_dt_ids NULL
+#endif
+
+static const struct platform_device_id sdhci_esdhc_pltfm_ids[] = {
+#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
+ { "sdhci-esdhc-imx", (kernel_ulong_t)&sdhci_esdhc_imx_pdata },
+#endif
+ { }
+};
+MODULE_DEVICE_TABLE(platform, sdhci_esdhc_pltfm_ids);
static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
{
@@ -227,8 +398,20 @@ static irqreturn_t cd_irq(int irq, void *data)
return IRQ_HANDLED;
};
-static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
+#ifndef CONFIG_MMC_SDHCI_ESDHC_IMX
+#define cpu_is_mx25() (0)
+#define cpu_is_mx35() (0)
+#define cpu_is_mx51() (0)
+#define cpu_is_imx() (0)
+#else
+#define cpu_is_imx() (1)
+#endif
+
+static int __devinit sdhci_esdhc_probe(struct platform_device *pdev)
{
+ const struct platform_device_id *platid = platform_get_device_id(pdev);
+ const struct of_device_id *dtid = pdev->dev.of_match;
+ struct sdhci_pltfm_data *pdata;
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_host *host;
struct esdhc_platform_data *boarddata;
@@ -236,12 +419,24 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
int err;
struct pltfm_imx_data *imx_data;
- host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata);
+ if (platid && platid->driver_data)
+ pdata = (void *)platid->driver_data;
+ else if (dtid && dtid->data)
+ pdata = dtid->data;
+ else
+ pdata = pdev->dev.platform_data;
+
+ host = sdhci_pltfm_init(pdev, pdata);
if (IS_ERR(host))
return PTR_ERR(host);
+ sdhci_get_of_property(pdev);
+
pltfm_host = sdhci_priv(host);
+ if (!cpu_is_imx())
+ goto add_host;
+
imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
if (!imx_data)
return -ENOMEM;
@@ -263,7 +458,7 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
/* Fix errata ENGcm07207 present on i.MX25 and i.MX35 */
host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK;
/* write_protect can't be routed to controller, use gpio */
- sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
+ pdata->ops->get_ro = esdhc_pltfm_get_ro;
}
if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
@@ -302,6 +497,7 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
}
+ add_host:
err = sdhci_add_host(host);
if (err)
goto err_add_host;
@@ -322,7 +518,7 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
return err;
}
-static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
+static int __devexit sdhci_esdhc_remove(struct platform_device *pdev)
{
struct sdhci_host *host = platform_get_drvdata(pdev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -351,31 +547,35 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
return 0;
}
-static struct platform_driver sdhci_esdhc_imx_driver = {
+static struct platform_driver sdhci_esdhc_driver = {
.driver = {
- .name = "sdhci-esdhc-imx",
+ .name = "sdhci-esdhc",
.owner = THIS_MODULE,
+ .of_match_table = sdhci_esdhc_dt_ids,
},
- .probe = sdhci_esdhc_imx_probe,
- .remove = __devexit_p(sdhci_esdhc_imx_remove),
+ .probe = sdhci_esdhc_probe,
+ .remove = __devexit_p(sdhci_esdhc_remove),
+ .id_table = sdhci_esdhc_pltfm_ids,
#ifdef CONFIG_PM
.suspend = sdhci_pltfm_suspend,
.resume = sdhci_pltfm_resume,
#endif
};
-static int __init sdhci_esdhc_imx_init(void)
+static int __init sdhci_esdhc_init(void)
{
- return platform_driver_register(&sdhci_esdhc_imx_driver);
+ return platform_driver_register(&sdhci_esdhc_driver);
}
-module_init(sdhci_esdhc_imx_init);
+module_init(sdhci_esdhc_init);
-static void __exit sdhci_esdhc_imx_exit(void)
+static void __exit sdhci_esdhc_exit(void)
{
- platform_driver_unregister(&sdhci_esdhc_imx_driver);
+ platform_driver_unregister(&sdhci_esdhc_driver);
}
-module_exit(sdhci_esdhc_imx_exit);
+module_exit(sdhci_esdhc_exit);
-MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC");
-MODULE_AUTHOR("Wolfram Sang <w.sang at pengutronix.de>");
+MODULE_DESCRIPTION("SDHCI driver for Freescale eSDHC");
+MODULE_AUTHOR("Xiaobo Xie <X.Xie at freescale.com>, "
+ "Anton Vorontsov <avorontsov at ru.mvista.com>, "
+ "Wolfram Sang <w.sang at pengutronix.de>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
deleted file mode 100644
index c3b08f1..0000000
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Freescale eSDHC controller driver generics for OF and pltfm.
- *
- * Copyright (c) 2007 Freescale Semiconductor, Inc.
- * Copyright (c) 2009 MontaVista Software, Inc.
- * Copyright (c) 2010 Pengutronix e.K.
- * Author: Wolfram Sang <w.sang at pengutronix.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
- */
-
-#ifndef _DRIVERS_MMC_SDHCI_ESDHC_H
-#define _DRIVERS_MMC_SDHCI_ESDHC_H
-
-/*
- * Ops and quirks for the Freescale eSDHC controller.
- */
-
-#define ESDHC_DEFAULT_QUIRKS (SDHCI_QUIRK_FORCE_BLK_SZ_2048 | \
- SDHCI_QUIRK_NO_BUSY_IRQ | \
- SDHCI_QUIRK_NONSTANDARD_CLOCK | \
- SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | \
- SDHCI_QUIRK_PIO_NEEDS_DELAY | \
- SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
-
-#define ESDHC_SYSTEM_CONTROL 0x2c
-#define ESDHC_CLOCK_MASK 0x0000fff0
-#define ESDHC_PREDIV_SHIFT 8
-#define ESDHC_DIVIDER_SHIFT 4
-#define ESDHC_CLOCK_PEREN 0x00000004
-#define ESDHC_CLOCK_HCKEN 0x00000002
-#define ESDHC_CLOCK_IPGEN 0x00000001
-
-/* pltfm-specific */
-#define ESDHC_HOST_CONTROL_LE 0x20
-
-/* OF-specific */
-#define ESDHC_DMA_SYSCTL 0x40c
-#define ESDHC_DMA_SNOOP 0x00000040
-
-#define ESDHC_HOST_CONTROL_RES 0x05
-
-static inline void esdhc_set_clock(struct sdhci_host *host, unsigned int clock)
-{
- int pre_div = 2;
- int div = 1;
- u32 temp;
-
- temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
- temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
- | ESDHC_CLOCK_MASK);
- sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
-
- if (clock == 0)
- goto out;
-
- while (host->max_clk / pre_div / 16 > clock && pre_div < 256)
- pre_div *= 2;
-
- while (host->max_clk / pre_div / div > clock && div < 16)
- div++;
-
- dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
- clock, host->max_clk / pre_div / div);
-
- pre_div >>= 1;
- div--;
-
- temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
- temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
- | (div << ESDHC_DIVIDER_SHIFT)
- | (pre_div << ESDHC_PREDIV_SHIFT));
- sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
- mdelay(100);
-out:
- host->clock = clock;
-}
-
-#endif /* _DRIVERS_MMC_SDHCI_ESDHC_H */
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
deleted file mode 100644
index 2db6a45..0000000
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- * Freescale eSDHC controller driver.
- *
- * Copyright (c) 2007 Freescale Semiconductor, Inc.
- * Copyright (c) 2009 MontaVista Software, Inc.
- *
- * Authors: Xiaobo Xie <X.Xie at freescale.com>
- * Anton Vorontsov <avorontsov at ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- */
-
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/mmc/host.h>
-#include "sdhci-pltfm.h"
-#include "sdhci.h"
-#include "sdhci-esdhc.h"
-
-static u16 esdhc_readw(struct sdhci_host *host, int reg)
-{
- u16 ret;
-
- if (unlikely(reg == SDHCI_HOST_VERSION))
- ret = in_be16(host->ioaddr + reg);
- else
- ret = sdhci_be32bs_readw(host, reg);
- return ret;
-}
-
-static void esdhc_writew(struct sdhci_host *host, u16 val, int reg)
-{
- if (reg == SDHCI_BLOCK_SIZE) {
- /*
- * Two last DMA bits are reserved, and first one is used for
- * non-standard blksz of 4096 bytes that we don't support
- * yet. So clear the DMA boundary bits.
- */
- val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
- }
- sdhci_be32bs_writew(host, val, reg);
-}
-
-static void esdhc_writeb(struct sdhci_host *host, u8 val, int reg)
-{
- /* Prevent SDHCI core from writing reserved bits (e.g. HISPD). */
- if (reg == SDHCI_HOST_CONTROL)
- val &= ~ESDHC_HOST_CONTROL_RES;
- sdhci_be32bs_writeb(host, val, reg);
-}
-
-static int esdhc_of_enable_dma(struct sdhci_host *host)
-{
- setbits32(host->ioaddr + ESDHC_DMA_SYSCTL, ESDHC_DMA_SNOOP);
- return 0;
-}
-
-static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host)
-{
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-
- return pltfm_host->clock;
-}
-
-static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
-{
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-
- return pltfm_host->clock / 256 / 16;
-}
-
-static struct sdhci_ops sdhci_esdhc_ops = {
- .read_l = sdhci_be32bs_readl,
- .read_w = esdhc_readw,
- .read_b = sdhci_be32bs_readb,
- .write_l = sdhci_be32bs_writel,
- .write_w = esdhc_writew,
- .write_b = esdhc_writeb,
- .set_clock = esdhc_set_clock,
- .enable_dma = esdhc_of_enable_dma,
- .get_max_clock = esdhc_of_get_max_clock,
- .get_min_clock = esdhc_of_get_min_clock,
-};
-
-static struct sdhci_pltfm_data sdhci_esdhc_pdata = {
- /* card detection could be handled via GPIO */
- .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
- | SDHCI_QUIRK_NO_CARD_NO_RESET,
- .ops = &sdhci_esdhc_ops,
-};
-
-static int __devinit sdhci_esdhc_probe(struct platform_device *pdev)
-{
- return sdhci_pltfm_register(pdev, &sdhci_esdhc_pdata);
-}
-
-static int __devexit sdhci_esdhc_remove(struct platform_device *pdev)
-{
- return sdhci_pltfm_unregister(pdev);
-}
-
-static const struct of_device_id sdhci_esdhc_of_match[] = {
- { .compatible = "fsl,mpc8379-esdhc" },
- { .compatible = "fsl,mpc8536-esdhc" },
- { .compatible = "fsl,esdhc" },
- { }
-};
-MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match);
-
-static struct platform_driver sdhci_esdhc_driver = {
- .driver = {
- .name = "sdhci-esdhc",
- .owner = THIS_MODULE,
- .of_match_table = sdhci_esdhc_of_match,
- },
- .probe = sdhci_esdhc_probe,
- .remove = __devexit_p(sdhci_esdhc_remove),
-#ifdef CONFIG_PM
- .suspend = sdhci_pltfm_suspend,
- .resume = sdhci_pltfm_resume,
-#endif
-};
-
-static int __init sdhci_esdhc_init(void)
-{
- return platform_driver_register(&sdhci_esdhc_driver);
-}
-module_init(sdhci_esdhc_init);
-
-static void __exit sdhci_esdhc_exit(void)
-{
- platform_driver_unregister(&sdhci_esdhc_driver);
-}
-module_exit(sdhci_esdhc_exit);
-
-MODULE_DESCRIPTION("SDHCI OF driver for Freescale MPC eSDHC");
-MODULE_AUTHOR("Xiaobo Xie <X.Xie at freescale.com>, "
- "Anton Vorontsov <avorontsov at ru.mvista.com>");
-MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mmc/esdhc.h b/include/linux/mmc/esdhc.h
new file mode 100644
index 0000000..e0f6598
--- /dev/null
+++ b/include/linux/mmc/esdhc.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010 Wolfram Sang <w.sang at pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#ifndef __LINUX_MMC_ESDHC_H
+#define __LINUX_MMC_ESDHC_H
+
+/**
+ * struct esdhc_platform_data - optional platform data for esdhc
+ *
+ * strongly recommended for i.MX25/35, not needed for other variants
+ *
+ * @wp_gpio: gpio for write_protect (-EINVAL if unused)
+ * @cd_gpio: gpio for card_detect interrupt (-EINVAL if unused)
+ */
+
+struct esdhc_platform_data {
+ unsigned int wp_gpio;
+ unsigned int cd_gpio;
+};
+
+#endif /* __LINUX_MMC_ESDHC_H */
--
1.7.4.1
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