2 * TI DaVinci DM646X EVM board
4 * Derived from: arch/arm/mach-davinci/board-evm.c
5 * Copyright (C) 2006 Texas Instruments.
7 * (C) 2007-2008, MontaVista Software, Inc.
9 * This file is licensed under the terms of the GNU General Public License
10 * version 2. This program is licensed "as is" without any warranty of any
11 * kind, whether express or implied.
15 /**************************************************************************
17 **************************************************************************/
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
23 #include <linux/major.h>
24 #include <linux/root_dev.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/serial.h>
27 #include <linux/serial_8250.h>
28 #include <linux/leds.h>
29 #include <linux/gpio.h>
31 #include <linux/platform_device.h>
32 #include <linux/i2c.h>
33 #include <linux/i2c/at24.h>
34 #include <linux/i2c/pcf857x.h>
35 #include <linux/etherdevice.h>
37 #include <asm/setup.h>
38 #include <asm/mach-types.h>
39 #include <asm/mach/arch.h>
40 #include <asm/mach/map.h>
41 #include <asm/mach/flash.h>
43 #include <mach/dm646x.h>
44 #include <mach/common.h>
46 #include <mach/serial.h>
49 #include <mach/emac.h>
50 #include <mach/common.h>
52 #define DM646X_EVM_PHY_MASK (0x2)
53 #define DM646X_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */
55 static struct davinci_uart_config uart_config __initdata = {
56 .enabled_uarts = (1 << 0),
61 static struct gpio_led evm_leds[] = {
62 { .name = "DS1", .active_low = 1, },
63 { .name = "DS2", .active_low = 1, },
64 { .name = "DS3", .active_low = 1, },
65 { .name = "DS4", .active_low = 1, },
68 static __initconst struct gpio_led_platform_data evm_led_data = {
69 .num_leds = ARRAY_SIZE(evm_leds),
73 static struct platform_device *evm_led_dev;
75 static int evm_led_setup(struct i2c_client *client, int gpio,
76 unsigned int ngpio, void *c)
78 struct gpio_led *leds = evm_leds;
86 evm_led_dev = platform_device_alloc("leds-gpio", 0);
87 platform_device_add_data(evm_led_dev, &evm_led_data,
88 sizeof(evm_led_data));
90 evm_led_dev->dev.parent = &client->dev;
91 status = platform_device_add(evm_led_dev);
93 platform_device_put(evm_led_dev);
99 static int evm_led_teardown(struct i2c_client *client, int gpio,
100 unsigned ngpio, void *c)
103 platform_device_unregister(evm_led_dev);
109 static int evm_sw_gpio[4] = { -EINVAL, -EINVAL, -EINVAL, -EINVAL };
111 static int evm_sw_setup(struct i2c_client *client, int gpio,
112 unsigned ngpio, void *c)
118 for (i = 0; i < 4; ++i) {
119 snprintf(label, 10, "user_sw%d", i);
120 status = gpio_request(gpio, label);
123 evm_sw_gpio[i] = gpio++;
125 status = gpio_direction_input(evm_sw_gpio[i]);
127 gpio_free(evm_sw_gpio[i]);
128 evm_sw_gpio[i] = -EINVAL;
132 status = gpio_export(evm_sw_gpio[i], 0);
134 gpio_free(evm_sw_gpio[i]);
135 evm_sw_gpio[i] = -EINVAL;
141 for (i = 0; i < 4; ++i) {
142 if (evm_sw_gpio[i] != -EINVAL) {
143 gpio_free(evm_sw_gpio[i]);
144 evm_sw_gpio[i] = -EINVAL;
150 static int evm_sw_teardown(struct i2c_client *client, int gpio,
151 unsigned ngpio, void *c)
155 for (i = 0; i < 4; ++i) {
156 if (evm_sw_gpio[i] != -EINVAL) {
157 gpio_unexport(evm_sw_gpio[i]);
158 gpio_free(evm_sw_gpio[i]);
159 evm_sw_gpio[i] = -EINVAL;
165 static int evm_pcf_setup(struct i2c_client *client, int gpio,
166 unsigned int ngpio, void *c)
173 status = evm_sw_setup(client, gpio, 4, c);
177 return evm_led_setup(client, gpio+4, 4, c);
180 static int evm_pcf_teardown(struct i2c_client *client, int gpio,
181 unsigned int ngpio, void *c)
185 evm_sw_teardown(client, gpio, 4, c);
186 evm_led_teardown(client, gpio+4, 4, c);
191 static struct pcf857x_platform_data pcf_data = {
192 .gpio_base = DAVINCI_N_GPIO+1,
193 .setup = evm_pcf_setup,
194 .teardown = evm_pcf_teardown,
197 /* Most of this EEPROM is unused, but U-Boot uses some data:
198 * - 0x7f00, 6 bytes Ethernet Address
199 * - ... newer boards may have more
201 static struct memory_accessor *at24_mem_acc;
203 static void at24_setup(struct memory_accessor *mem_acc, void *context)
205 char mac_addr[ETH_ALEN];
206 struct davinci_soc_info *soc_info = &davinci_soc_info;
208 at24_mem_acc = mem_acc;
210 /* Read MAC addr from EEPROM */
211 if (at24_mem_acc->read(at24_mem_acc, mac_addr, 0x7f00, ETH_ALEN) ==
213 pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
214 memcpy(soc_info->emac_pdata->mac_addr, mac_addr, ETH_ALEN);
218 static struct at24_platform_data eeprom_info = {
219 .byte_len = (256*1024) / 8,
221 .flags = AT24_FLAG_ADDR16,
225 static struct i2c_board_info __initdata i2c_info[] = {
227 I2C_BOARD_INFO("24c256", 0x50),
228 .platform_data = &eeprom_info,
231 I2C_BOARD_INFO("pcf8574a", 0x38),
232 .platform_data = &pcf_data,
236 static struct davinci_i2c_platform_data i2c_pdata = {
237 .bus_freq = 100 /* kHz */,
238 .bus_delay = 0 /* usec */,
241 static void __init evm_init_i2c(void)
243 davinci_init_i2c(&i2c_pdata);
244 i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
247 static void __init davinci_map_io(void)
252 static __init void evm_init(void)
254 struct davinci_soc_info *soc_info = &davinci_soc_info;
257 davinci_serial_init(&uart_config);
259 soc_info->emac_pdata->phy_mask = DM646X_EVM_PHY_MASK;
260 soc_info->emac_pdata->mdio_max_freq = DM646X_EVM_MDIO_FREQUENCY;
261 dm646x_init_emac(soc_info->emac_pdata);
264 static __init void davinci_dm646x_evm_irq_init(void)
269 MACHINE_START(DAVINCI_DM6467_EVM, "DaVinci DM646x EVM")
271 .io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
272 .boot_params = (0x80000100),
273 .map_io = davinci_map_io,
274 .init_irq = davinci_dm646x_evm_irq_init,
275 .timer = &davinci_timer,
276 .init_machine = evm_init,