diff options
Diffstat (limited to 'arch/arm/mach-davinci/board-dm646x-evm.c')
| -rw-r--r-- | arch/arm/mach-davinci/board-dm646x-evm.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c new file mode 100644 index 000000000000..94cb623b1ec9 --- /dev/null +++ b/arch/arm/mach-davinci/board-dm646x-evm.c @@ -0,0 +1,280 @@ +/* + * TI DaVinci DM646X EVM board + * + * Derived from: arch/arm/mach-davinci/board-evm.c + * Copyright (C) 2006 Texas Instruments. + * + * (C) 2007-2008, MontaVista Software, Inc. + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + * + */ + +/************************************************************************** + * Included Files + **************************************************************************/ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/major.h> +#include <linux/root_dev.h> +#include <linux/dma-mapping.h> +#include <linux/serial.h> +#include <linux/serial_8250.h> +#include <linux/leds.h> +#include <linux/gpio.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/i2c/at24.h> +#include <linux/i2c/pcf857x.h> +#include <linux/etherdevice.h> + +#include <asm/setup.h> +#include <asm/mach-types.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/flash.h> + +#include <mach/dm646x.h> +#include <mach/common.h> +#include <mach/psc.h> +#include <mach/serial.h> +#include <mach/i2c.h> + +static struct davinci_uart_config uart_config __initdata = { + .enabled_uarts = (1 << 0), +}; + +/* LEDS */ + +static struct gpio_led evm_leds[] = { + { .name = "DS1", .active_low = 1, }, + { .name = "DS2", .active_low = 1, }, + { .name = "DS3", .active_low = 1, }, + { .name = "DS4", .active_low = 1, }, +}; + +static __initconst struct gpio_led_platform_data evm_led_data = { + .num_leds = ARRAY_SIZE(evm_leds), + .leds = evm_leds, +}; + +static struct platform_device *evm_led_dev; + +static int evm_led_setup(struct i2c_client *client, int gpio, + unsigned int ngpio, void *c) +{ + struct gpio_led *leds = evm_leds; + int status; + + while (ngpio--) { + leds->gpio = gpio++; + leds++; + }; + + evm_led_dev = platform_device_alloc("leds-gpio", 0); + platform_device_add_data(evm_led_dev, &evm_led_data, + sizeof(evm_led_data)); + + evm_led_dev->dev.parent = &client->dev; + status = platform_device_add(evm_led_dev); + if (status < 0) { + platform_device_put(evm_led_dev); + evm_led_dev = NULL; + } + return status; +} + +static int evm_led_teardown(struct i2c_client *client, int gpio, + unsigned ngpio, void *c) +{ + if (evm_led_dev) { + platform_device_unregister(evm_led_dev); + evm_led_dev = NULL; + } + return 0; +} + +static int evm_sw_gpio[4] = { -EINVAL, -EINVAL, -EINVAL, -EINVAL }; + +static int evm_sw_setup(struct i2c_client *client, int gpio, + unsigned ngpio, void *c) +{ + int status; + int i; + char label[10]; + + for (i = 0; i < 4; ++i) { + snprintf(label, 10, "user_sw%d", i); + status = gpio_request(gpio, label); + if (status) + goto out_free; + evm_sw_gpio[i] = gpio++; + + status = gpio_direction_input(evm_sw_gpio[i]); + if (status) { + gpio_free(evm_sw_gpio[i]); + evm_sw_gpio[i] = -EINVAL; + goto out_free; + } + + status = gpio_export(evm_sw_gpio[i], 0); + if (status) { + gpio_free(evm_sw_gpio[i]); + evm_sw_gpio[i] = -EINVAL; + goto out_free; + } + } + return status; +out_free: + for (i = 0; i < 4; ++i) { + if (evm_sw_gpio[i] != -EINVAL) { + gpio_free(evm_sw_gpio[i]); + evm_sw_gpio[i] = -EINVAL; + } + } + return status; +} + +static int evm_sw_teardown(struct i2c_client *client, int gpio, + unsigned ngpio, void *c) +{ + int i; + + for (i = 0; i < 4; ++i) { + if (evm_sw_gpio[i] != -EINVAL) { + gpio_unexport(evm_sw_gpio[i]); + gpio_free(evm_sw_gpio[i]); + evm_sw_gpio[i] = -EINVAL; + } + } + return 0; +} + +static int evm_pcf_setup(struct i2c_client *client, int gpio, + unsigned int ngpio, void *c) +{ + int status; + + if (ngpio < 8) + return -EINVAL; + + status = evm_sw_setup(client, gpio, 4, c); + if (status) + return status; + + return evm_led_setup(client, gpio+4, 4, c); +} + +static int evm_pcf_teardown(struct i2c_client *client, int gpio, + unsigned int ngpio, void *c) +{ + BUG_ON(ngpio < 8); + + evm_sw_teardown(client, gpio, 4, c); + evm_led_teardown(client, gpio+4, 4, c); + + return 0; +} + +static struct pcf857x_platform_data pcf_data = { + .gpio_base = DAVINCI_N_GPIO+1, + .setup = evm_pcf_setup, + .teardown = evm_pcf_teardown, +}; + +/* Most of this EEPROM is unused, but U-Boot uses some data: + * - 0x7f00, 6 bytes Ethernet Address + * - ... newer boards may have more + */ +static struct memory_accessor *at24_mem_acc; + +static void at24_setup(struct memory_accessor *mem_acc, void *context) +{ + char mac_addr[6]; + + at24_mem_acc = mem_acc; + + /* Read MAC addr from EEPROM */ + if (at24_mem_acc->read(at24_mem_acc, mac_addr, 0x7f00, ETH_ALEN) == + ETH_ALEN) + pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); +} + +static struct at24_platform_data eeprom_info = { + .byte_len = (256*1024) / 8, + .page_size = 64, + .flags = AT24_FLAG_ADDR16, + .setup = at24_setup, +}; + +int dm646xevm_eeprom_read(void *buf, off_t off, size_t count) +{ + if (at24_mem_acc) + return at24_mem_acc->read(at24_mem_acc, buf, off, count); + return -ENODEV; +} +EXPORT_SYMBOL(dm646xevm_eeprom_read); + +int dm646xevm_eeprom_write(void *buf, off_t off, size_t count) +{ + if (at24_mem_acc) + return at24_mem_acc->write(at24_mem_acc, buf, off, count); + return -ENODEV; +} +EXPORT_SYMBOL(dm646xevm_eeprom_write); + +static struct i2c_board_info __initdata i2c_info[] = { + { + I2C_BOARD_INFO("24c256", 0x50), + .platform_data = &eeprom_info, + }, + { + I2C_BOARD_INFO("pcf8574a", 0x38), + .platform_data = &pcf_data, + }, +}; + +static struct davinci_i2c_platform_data i2c_pdata = { + .bus_freq = 100 /* kHz */, + .bus_delay = 0 /* usec */, +}; + +static void __init evm_init_i2c(void) +{ + davinci_init_i2c(&i2c_pdata); + i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info)); +} + +static void __init davinci_map_io(void) +{ + davinci_map_common_io(); + dm646x_init(); +} + +static __init void evm_init(void) +{ + evm_init_i2c(); + davinci_serial_init(&uart_config); +} + +static __init void davinci_dm646x_evm_irq_init(void) +{ + davinci_irq_init(); +} + +MACHINE_START(DAVINCI_DM6467_EVM, "DaVinci DM646x EVM") + .phys_io = IO_PHYS, + .io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc, + .boot_params = (0x80000100), + .map_io = davinci_map_io, + .init_irq = davinci_dm646x_evm_irq_init, + .timer = &davinci_timer, + .init_machine = evm_init, +MACHINE_END + |