+++ /dev/null
-This enables the mmc-over-spi driver for the Sim.One board, based on Mika's
-patch, which used a GPIO for chip select in stead of the default SFRMOUT pin.
-I've modified it to use the usual SFRMOUT; if you've modified your Sim.One
-board to use a GPIO instead, uncomment and modify
-// #define MMC_CHIP_SELECT_GPIO EP93XX_GPIO_LINE_EGPIO15
-in the source file.
- -martinwguy, 14 May 2010
-
-From: Mika Westerberg <mika.westerberg@iki.fi>
-Date: Wed, 28 Apr 2010 08:42:46 +0300
-Subject: [PATCH] ep93xx: simone: added board specific SPI support for MMC/SD cards
-
-This includes setting up EGPIOs 0 and 9 for card detection and chip select
-respectively.
-
---- a/arch/arm/mach-ep93xx/simone.c
-+++ b/arch/arm/mach-ep93xx/simone.c
-@@ -18,12 +18,17 @@
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/platform_device.h>
-+#include <linux/gpio.h>
- #include <linux/i2c.h>
- #include <linux/i2c-gpio.h>
-+#include <linux/mmc/host.h>
-+#include <linux/spi/spi.h>
-+#include <linux/spi/mmc_spi.h>
-
- #include <mach/hardware.h>
- #include <mach/fb.h>
- #include <mach/gpio-ep93xx.h>
-+#include <mach/ep93xx_spi.h>
-
- #include <asm/hardware/vic.h>
- #include <asm/mach-types.h>
-@@ -41,6 +46,135 @@ static struct ep93xxfb_mach_info __initd
- .flags = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
- };
-
-+/*
-+ * GPIO lines used for MMC card detection.
-+ */
-+#define MMC_CARD_DETECT_GPIO EP93XX_GPIO_LINE_EGPIO0
-+
-+/*
-+ * If you have hacked your Sim.One to use a GPIO as SD card chip select
-+ * (SD pin 1), uncomment the following line.
-+ * The example, EGPIO15, is on TP17 near the CPU.
-+ */
-+// #define MMC_CHIP_SELECT_GPIO EP93XX_GPIO_LINE_EGPIO15
-+
-+/*
-+ * MMC SPI chip select GPIO handling. If you are using SFRMOUT (SFRM1) signal,
-+ * you can leave these empty and pass NULL as .controller_data.
-+ */
-+
-+#ifdef MMC_CHIP_SELECT_GPIO
-+static int simone_mmc_spi_setup(struct spi_device *spi)
-+{
-+ unsigned int gpio = MMC_CHIP_SELECT_GPIO;
-+ int err;
-+
-+ err = gpio_request(gpio, spi->modalias);
-+ if (err)
-+ return err;
-+
-+ err = gpio_direction_output(gpio, 1);
-+ if (err) {
-+ gpio_free(gpio);
-+ return err;
-+ }
-+
-+ return 0;
-+}
-+
-+static void simone_mmc_spi_cleanup(struct spi_device *spi)
-+{
-+ unsigned int gpio = MMC_CHIP_SELECT_GPIO;
-+
-+ gpio_set_value(gpio, 1);
-+ gpio_direction_input(gpio);
-+ gpio_free(gpio);
-+}
-+
-+static void simone_mmc_spi_cs_control(struct spi_device *spi, int value)
-+{
-+ gpio_set_value(MMC_CHIP_SELECT_GPIO, value);
-+}
-+
-+static struct ep93xx_spi_chip_ops simone_mmc_spi_ops = {
-+ .setup = simone_mmc_spi_setup,
-+ .cleanup = simone_mmc_spi_cleanup,
-+ .cs_control = simone_mmc_spi_cs_control,
-+};
-+#endif
-+
-+/*
-+ * MMC card detection GPIO setup.
-+ */
-+static int simone_mmc_spi_init(struct device *dev,
-+ irqreturn_t (*irq_handler)(int, void *), void *mmc)
-+{
-+ unsigned int gpio = MMC_CARD_DETECT_GPIO;
-+ int irq, err;
-+
-+ err = gpio_request(gpio, dev_name(dev));
-+ if (err)
-+ return err;
-+
-+ err = gpio_direction_input(gpio);
-+ if (err)
-+ goto fail;
-+
-+ irq = gpio_to_irq(gpio);
-+ if (irq < 0)
-+ goto fail;
-+
-+ err = request_irq(irq, irq_handler, IRQF_TRIGGER_FALLING,
-+ "MMC card detect", mmc);
-+ if (err)
-+ goto fail;
-+
-+ printk(KERN_INFO "%s: using irq %d for MMC card detection\n",
-+ dev_name(dev), irq);
-+
-+ return 0;
-+fail:
-+ gpio_free(gpio);
-+ return err;
-+}
-+
-+static void simone_mmc_spi_exit(struct device *dev, void *mmc)
-+{
-+ unsigned int gpio = MMC_CARD_DETECT_GPIO;
-+
-+ free_irq(gpio_to_irq(gpio), mmc);
-+ gpio_free(gpio);
-+}
-+
-+static struct mmc_spi_platform_data simone_mmc_spi_data = {
-+ .init = simone_mmc_spi_init,
-+ .exit = simone_mmc_spi_exit,
-+ .detect_delay = 500,
-+ .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
-+};
-+
-+static struct spi_board_info simone_spi_devices[] __initdata = {
-+ {
-+ .modalias = "mmc_spi",
-+#ifdef MMC_CHIP_SELECT_GPIO
-+ .controller_data = &simone_mmc_spi_ops,
-+#endif
-+ .platform_data = &simone_mmc_spi_data,
-+ /*
-+ * We use 10 MHz even though the maximum is 3.7 MHz. The driver
-+ * will limit it automatically to max. frequency.
-+ */
-+ .max_speed_hz = 10 * 1000 * 1000,
-+ .bus_num = 0,
-+ .chip_select = 0,
-+ .mode = SPI_MODE_3,
-+ },
-+};
-+
-+static struct ep93xx_spi_info simone_spi_info __initdata = {
-+ .num_chipselect = ARRAY_SIZE(simone_spi_devices),
-+};
-+
- static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = {
- .sda_pin = EP93XX_GPIO_LINE_EEDAT,
- .sda_is_open_drain = 0,
-@@ -75,6 +209,8 @@ static void __init simone_init_machine(v
- ep93xx_register_fb(&simone_fb_info);
- ep93xx_register_i2c(&simone_i2c_gpio_data, simone_i2c_board_info,
- ARRAY_SIZE(simone_i2c_board_info));
-+ ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
-+ ARRAY_SIZE(simone_spi_devices));
- simone_register_audio();
- }
-
projects / openwrt.git / blobdiff