ARM: LPC32xx: Add MMC controller support
This patch adds support for the MMC controller of the LPC32xx SoC to the
platform initialization via the pl08x primecell driver. Lacking more complete
DT support, done via DT auxdata.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
diff --git a/arch/arm/mach-lpc32xx/phy3250.c b/arch/arm/mach-lpc32xx/phy3250.c
index eade77f..03ee349 100644
--- a/arch/arm/mach-lpc32xx/phy3250.c
+++ b/arch/arm/mach-lpc32xx/phy3250.c
@@ -30,12 +30,13 @@
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/amba/pl022.h>
+#include <linux/amba/pl08x.h>
+#include <linux/amba/mmci.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
-#include <linux/amba/pl08x.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
@@ -50,9 +51,12 @@
/*
* Mapped GPIOLIB GPIOs
*/
-#define SPI0_CS_GPIO LPC32XX_GPIO(LPC32XX_GPIO_P3_GRP, 5)
-#define LCD_POWER_GPIO LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 0)
-#define BKL_POWER_GPIO LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 4)
+#define SPI0_CS_GPIO LPC32XX_GPIO(LPC32XX_GPIO_P3_GRP, 5)
+#define LCD_POWER_GPIO LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 0)
+#define BKL_POWER_GPIO LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 4)
+#define MMC_PWR_ENABLE_GPIO LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 5)
+#define MMC_CD_GPIO LPC32XX_GPIO(LPC32XX_GPIO_P3_GRP, 1)
+#define MMC_WP_GPIO LPC32XX_GPIO(LPC32XX_GPIO_P3_GRP, 0)
/*
* AMBA LCD controller
@@ -260,11 +264,32 @@
.mem_buses = PL08X_AHB1,
};
+static int mmc_handle_ios(struct device *dev, struct mmc_ios *ios)
+{
+ /* Only on and off are supported */
+ if (ios->power_mode == MMC_POWER_OFF)
+ gpio_set_value(MMC_PWR_ENABLE_GPIO, 0);
+ else
+ gpio_set_value(MMC_PWR_ENABLE_GPIO, 1);
+ return 0;
+}
+
+static struct mmci_platform_data lpc32xx_mmci_data = {
+ .ocr_mask = MMC_VDD_30_31 | MMC_VDD_31_32 |
+ MMC_VDD_32_33 | MMC_VDD_33_34,
+ .ios_handler = mmc_handle_ios,
+ .dma_filter = NULL,
+ /* No DMA for now since AMBA PL080 dmaengine driver only does scatter
+ * gather, and the MMCI driver doesn't do it this way */
+};
+
static const struct of_dev_auxdata lpc32xx_auxdata_lookup[] __initconst = {
OF_DEV_AUXDATA("arm,pl022", 0x20084000, "dev:ssp0", &lpc32xx_ssp0_data),
OF_DEV_AUXDATA("arm,pl022", 0x2008C000, "dev:ssp1", &lpc32xx_ssp1_data),
OF_DEV_AUXDATA("arm,pl110", 0x31040000, "dev:clcd", &lpc32xx_clcd_data),
OF_DEV_AUXDATA("arm,pl080", 0x31000000, "pl08xdmac", &pl08x_pd),
+ OF_DEV_AUXDATA("arm,pl18x", 0x20098000, "20098000.sd",
+ &lpc32xx_mmci_data),
{ }
};
@@ -308,6 +333,11 @@
* detection or a data fault will occur, so enable the clocks
* here.
*/
+ tmp = __raw_readl(LPC32XX_CLKPWR_MS_CTRL);
+ tmp |= LPC32XX_CLKPWR_MSCARD_SDCARD_EN |
+ LPC32XX_CLKPWR_MSCARD_MSDIO_PU_EN;
+ __raw_writel(tmp, LPC32XX_CLKPWR_MS_CTRL);
+
tmp = __raw_readl(LPC32XX_CLKPWR_LCDCLK_CTRL);
__raw_writel((tmp | LPC32XX_CLKPWR_LCDCTRL_CLK_EN),
LPC32XX_CLKPWR_LCDCLK_CTRL);
@@ -335,6 +365,11 @@
else if (gpio_direction_output(SPI0_CS_GPIO, 1))
printk(KERN_ERR "Error setting gpio %u to output",
SPI0_CS_GPIO);
+
+ if (gpio_request(MMC_PWR_ENABLE_GPIO, "mmc_power_en"))
+ pr_err("Error requesting gpio %u", MMC_PWR_ENABLE_GPIO);
+ else if (gpio_direction_output(MMC_PWR_ENABLE_GPIO, 1))
+ pr_err("Error setting gpio %u to output", MMC_PWR_ENABLE_GPIO);
}
static char const *lpc32xx_dt_compat[] __initdata = {
