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 3a08b18f6433..97a249395b5a 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 3cedcf2d39e5..574209d9e246 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 000000000000..10f6488f6e44
--- /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