ep93xx: add support Vision EP9307 SoM

Add support for Vision Engraving Systems EP9307 based SoM.

Signed-off-by: Hartley Sweeten <hartleys@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 372 insertions, 0 deletions

diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig
index 3a08b18..97a2493 100644
--- a/arch/arm/mach-ep93xx/Kconfig
+++ b/arch/arm/mach-ep93xx/Kconfig
@@ -182,6 +182,13 @@ config MACH_TS72XX
 	  Say 'Y' here if you want your kernel to support the
 	  Technologic Systems TS-72xx board.
 
+config MACH_VISION_EP9307
+	bool "Support Vision Engraving Systems EP9307 SoM"
+	depends on EP93XX_SDCE0_PHYS_OFFSET
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Vision Engraving Systems EP9307 SoM.
+
 choice
 	prompt "Select a UART for early kernel messages"
 
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile
index 3cedcf2..574209d9 100644
--- a/arch/arm/mach-ep93xx/Makefile
+++ b/arch/arm/mach-ep93xx/Makefile
@@ -15,3 +15,4 @@ obj-$(CONFIG_MACH_MICRO9)	+= micro9.o
 obj-$(CONFIG_MACH_SIM_ONE)	+= simone.o
 obj-$(CONFIG_MACH_SNAPPER_CL15)	+= snappercl15.o
 obj-$(CONFIG_MACH_TS72XX)	+= ts72xx.o
+obj-$(CONFIG_MACH_VISION_EP9307)+= vision_ep9307.o
diff --git a/arch/arm/mach-ep93xx/vision_ep9307.c b/arch/arm/mach-ep93xx/vision_ep9307.c
new file mode 100644
index 0000000..10f6488
--- /dev/null
+++ b/arch/arm/mach-ep93xx/vision_ep9307.c
@@ -0,0 +1,364 @@
+/*
+ * arch/arm/mach-ep93xx/vision_ep9307.c
+ * Vision Engraving Systems EP9307 SoM support.
+ *
+ * Copyright (C) 2008-2011 Vision Engraving Systems
+ * H Hartley Sweeten <hsweeten@visionengravers.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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/fb.h>
+#include <linux/io.h>
+#include <linux/mtd/partitions.h>
+#include <linux/i2c.h>
+#include <linux/i2c-gpio.h>
+#include <linux/i2c/pca953x.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/mmc_spi.h>
+#include <linux/mmc/host.h>
+
+#include <mach/hardware.h>
+#include <mach/fb.h>
+#include <mach/ep93xx_spi.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+
+/*************************************************************************
+ * Static I/O mappings for the FPGA
+ *************************************************************************/
+#define VISION_PHYS_BASE	EP93XX_CS7_PHYS_BASE
+#define VISION_VIRT_BASE	0xfebff000
+
+static struct map_desc vision_io_desc[] __initdata = {
+	{
+		.virtual	= VISION_VIRT_BASE,
+		.pfn		= __phys_to_pfn(VISION_PHYS_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	},
+};
+
+static void __init vision_map_io(void)
+{
+	ep93xx_map_io();
+
+	iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
+}
+
+/*************************************************************************
+ * Ethernet
+ *************************************************************************/
+static struct ep93xx_eth_data vision_eth_data __initdata = {
+	.phy_id		= 1,
+};
+
+/*************************************************************************
+ * Framebuffer
+ *************************************************************************/
+#define VISION_LCD_ENABLE	EP93XX_GPIO_LINE_EGPIO1
+
+static int vision_lcd_setup(struct platform_device *pdev)
+{
+	int err;
+
+	err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
+				dev_name(&pdev->dev));
+	if (err)
+		return err;
+
+	ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
+				 EP93XX_SYSCON_DEVCFG_RASONP3 |
+				 EP93XX_SYSCON_DEVCFG_EXVC);
+
+	return 0;
+}
+
+static void vision_lcd_teardown(struct platform_device *pdev)
+{
+	gpio_free(VISION_LCD_ENABLE);
+}
+
+static void vision_lcd_blank(int blank_mode, struct fb_info *info)
+{
+	if (blank_mode)
+		gpio_set_value(VISION_LCD_ENABLE, 0);
+	else
+		gpio_set_value(VISION_LCD_ENABLE, 1);
+}
+
+static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
+	.num_modes	= EP93XXFB_USE_MODEDB,
+	.bpp		= 16,
+	.flags		= EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
+	.setup		= vision_lcd_setup,
+	.teardown	= vision_lcd_teardown,
+	.blank		= vision_lcd_blank,
+};
+
+
+/*************************************************************************
+ * GPIO Expanders
+ *************************************************************************/
+#define PCA9539_74_GPIO_BASE	(EP93XX_GPIO_LINE_MAX + 1)
+#define PCA9539_75_GPIO_BASE	(PCA9539_74_GPIO_BASE + 16)
+#define PCA9539_76_GPIO_BASE	(PCA9539_75_GPIO_BASE + 16)
+#define PCA9539_77_GPIO_BASE	(PCA9539_76_GPIO_BASE + 16)
+
+static struct pca953x_platform_data pca953x_74_gpio_data = {
+	.gpio_base	= PCA9539_74_GPIO_BASE,
+	.irq_base	= EP93XX_BOARD_IRQ(0),
+};
+
+static struct pca953x_platform_data pca953x_75_gpio_data = {
+	.gpio_base	= PCA9539_75_GPIO_BASE,
+	.irq_base	= -1,
+};
+
+static struct pca953x_platform_data pca953x_76_gpio_data = {
+	.gpio_base	= PCA9539_76_GPIO_BASE,
+	.irq_base	= -1,
+};
+
+static struct pca953x_platform_data pca953x_77_gpio_data = {
+	.gpio_base	= PCA9539_77_GPIO_BASE,
+	.irq_base	= -1,
+};
+
+/*************************************************************************
+ * I2C Bus
+ *************************************************************************/
+static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
+	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
+	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
+};
+
+static struct i2c_board_info vision_i2c_info[] __initdata = {
+	{
+		I2C_BOARD_INFO("isl1208", 0x6f),
+		.irq		= IRQ_EP93XX_EXT1,
+	}, {
+		I2C_BOARD_INFO("pca9539", 0x74),
+		.platform_data	= &pca953x_74_gpio_data,
+		.irq		= gpio_to_irq(EP93XX_GPIO_LINE_F(7)),
+	}, {
+		I2C_BOARD_INFO("pca9539", 0x75),
+		.platform_data	= &pca953x_75_gpio_data,
+	}, {
+		I2C_BOARD_INFO("pca9539", 0x76),
+		.platform_data	= &pca953x_76_gpio_data,
+	}, {
+		I2C_BOARD_INFO("pca9539", 0x77),
+		.platform_data	= &pca953x_77_gpio_data,
+	},
+};
+
+/*************************************************************************
+ * SPI Flash
+ *************************************************************************/
+#define VISION_SPI_FLASH_CS	EP93XX_GPIO_LINE_EGPIO7
+
+static struct mtd_partition vision_spi_flash_partitions[] = {
+	{
+		.name	= "SPI bootstrap",
+		.offset	= 0,
+		.size	= SZ_4K,
+	}, {
+		.name	= "Bootstrap config",
+		.offset	= MTDPART_OFS_APPEND,
+		.size	= SZ_4K,
+	}, {
+		.name	= "System config",
+		.offset	= MTDPART_OFS_APPEND,
+		.size	= MTDPART_SIZ_FULL,
+	},
+};
+
+static struct flash_platform_data vision_spi_flash_data = {
+	.name		= "SPI Flash",
+	.parts		= vision_spi_flash_partitions,
+	.nr_parts	= ARRAY_SIZE(vision_spi_flash_partitions),
+};
+
+static int vision_spi_flash_hw_setup(struct spi_device *spi)
+{
+	return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
+				spi->modalias);
+}
+
+static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
+{
+	gpio_free(VISION_SPI_FLASH_CS);
+}
+
+static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
+{
+	gpio_set_value(VISION_SPI_FLASH_CS, value);
+}
+
+static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
+	.setup		= vision_spi_flash_hw_setup,
+	.cleanup	= vision_spi_flash_hw_cleanup,
+	.cs_control	= vision_spi_flash_hw_cs_control,
+};
+
+/*************************************************************************
+ * SPI SD/MMC host
+ *************************************************************************/
+#define VISION_SPI_MMC_CS	EP93XX_GPIO_LINE_G(2)
+#define VISION_SPI_MMC_WP	EP93XX_GPIO_LINE_F(0)
+#define VISION_SPI_MMC_CD	EP93XX_GPIO_LINE_EGPIO15
+
+static struct gpio vision_spi_mmc_gpios[] = {
+	{ VISION_SPI_MMC_WP, GPIOF_DIR_IN, "mmc_spi:wp" },
+	{ VISION_SPI_MMC_CD, GPIOF_DIR_IN, "mmc_spi:cd" },
+};
+
+static int vision_spi_mmc_init(struct device *pdev,
+			irqreturn_t (*func)(int, void *), void *pdata)
+{
+	int err;
+
+	err = gpio_request_array(vision_spi_mmc_gpios,
+				 ARRAY_SIZE(vision_spi_mmc_gpios));
+	if (err)
+		return err;
+
+	err = gpio_set_debounce(VISION_SPI_MMC_CD, 1);
+	if (err)
+		goto exit_err;
+
+	err = request_irq(gpio_to_irq(VISION_SPI_MMC_CD), func,
+			IRQ_TYPE_EDGE_BOTH, "mmc_spi:cd", pdata);
+	if (err)
+		goto exit_err;
+
+	return 0;
+
+exit_err:
+	gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
+	return err;
+
+}
+
+static void vision_spi_mmc_exit(struct device *pdev, void *pdata)
+{
+	free_irq(gpio_to_irq(VISION_SPI_MMC_CD), pdata);
+	gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
+}
+
+static int vision_spi_mmc_get_ro(struct device *pdev)
+{
+	return !!gpio_get_value(VISION_SPI_MMC_WP);
+}
+
+static int vision_spi_mmc_get_cd(struct device *pdev)
+{
+	return !gpio_get_value(VISION_SPI_MMC_CD);
+}
+
+static struct mmc_spi_platform_data vision_spi_mmc_data = {
+	.init		= vision_spi_mmc_init,
+	.exit		= vision_spi_mmc_exit,
+	.get_ro		= vision_spi_mmc_get_ro,
+	.get_cd		= vision_spi_mmc_get_cd,
+	.detect_delay	= 100,
+	.powerup_msecs	= 100,
+	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
+};
+
+static int vision_spi_mmc_hw_setup(struct spi_device *spi)
+{
+	return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
+				spi->modalias);
+}
+
+static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
+{
+	gpio_free(VISION_SPI_MMC_CS);
+}
+
+static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
+{
+	gpio_set_value(VISION_SPI_MMC_CS, value);
+}
+
+static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
+	.setup		= vision_spi_mmc_hw_setup,
+	.cleanup	= vision_spi_mmc_hw_cleanup,
+	.cs_control	= vision_spi_mmc_hw_cs_control,
+};
+
+/*************************************************************************
+ * SPI Bus
+ *************************************************************************/
+static struct spi_board_info vision_spi_board_info[] __initdata = {
+	{
+		.modalias		= "sst25l",
+		.platform_data		= &vision_spi_flash_data,
+		.controller_data	= &vision_spi_flash_hw,
+		.max_speed_hz		= 20000000,
+		.bus_num		= 0,
+		.chip_select		= 0,
+		.mode			= SPI_MODE_3,
+	}, {
+		.modalias		= "mmc_spi",
+		.platform_data		= &vision_spi_mmc_data,
+		.controller_data	= &vision_spi_mmc_hw,
+		.max_speed_hz		= 20000000,
+		.bus_num		= 0,
+		.chip_select		= 1,
+		.mode			= SPI_MODE_3,
+	},
+};
+
+static struct ep93xx_spi_info vision_spi_master __initdata = {
+	.num_chipselect		= ARRAY_SIZE(vision_spi_board_info),
+};
+
+/*************************************************************************
+ * Machine Initialization
+ *************************************************************************/
+static void __init vision_init_machine(void)
+{
+	ep93xx_init_devices();
+	ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
+	ep93xx_register_eth(&vision_eth_data, 1);
+	ep93xx_register_fb(&ep93xxfb_info);
+	ep93xx_register_pwm(1, 0);
+
+	/*
+	 * Request the gpio expander's interrupt gpio line now to prevent
+	 * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
+	 */
+	if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
+				"pca9539:74"))
+		pr_warn("cannot request interrupt gpio for pca9539:74\n");
+
+	ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
+				ARRAY_SIZE(vision_i2c_info));
+	ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
+				ARRAY_SIZE(vision_spi_board_info));
+}
+
+MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
+	/* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
+	.boot_params	= EP93XX_SDCE0_PHYS_BASE + 0x100,
+	.map_io		= vision_map_io,
+	.init_irq	= ep93xx_init_irq,
+	.timer		= &ep93xx_timer,
+	.init_machine	= vision_init_machine,
+MACHINE_END