/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DM646X_EVM_PHY_MASK (0x2) #define DM646X_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */ 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[ETH_ALEN]; struct davinci_soc_info *soc_info = &davinci_soc_info; 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); memcpy(soc_info->emac_pdata->mac_addr, mac_addr, ETH_ALEN); } } 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) { dm646x_init(); } static __init void evm_init(void) { struct davinci_soc_info *soc_info = &davinci_soc_info; evm_init_i2c(); davinci_serial_init(&uart_config); soc_info->emac_pdata->phy_mask = DM646X_EVM_PHY_MASK; soc_info->emac_pdata->mdio_max_freq = DM646X_EVM_MDIO_FREQUENCY; dm646x_init_emac(soc_info->emac_pdata); } 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