diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/vision_ep9307.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/vision_ep9307.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/vision_ep9307.c b/arch/arm/mach-ep93xx/vision_ep9307.c new file mode 100644 index 00000000000..03dd4012043 --- /dev/null +++ b/arch/arm/mach-ep93xx/vision_ep9307.c @@ -0,0 +1,365 @@ +/* + * 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> */ + .atag_offset = 0x100, + .map_io = vision_map_io, + .init_irq = ep93xx_init_irq, + .timer = &ep93xx_timer, + .init_machine = vision_init_machine, + .restart = ep93xx_restart, +MACHINE_END |