[ep93xx] add 3.6 kernel support

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34622 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 180 insertions, 0 deletions

diff --git a/target/linux/ep93xx/patches-3.6/004-simone_add_mmc_spi.patch b/target/linux/ep93xx/patches-3.6/004-simone_add_mmc_spi.patch
new file mode 100644
index 0000000000..32627cacfd
--- /dev/null
+++ b/target/linux/ep93xx/patches-3.6/004-simone_add_mmc_spi.patch
@@ -0,0 +1,180 @@
+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();
+ }
+