/*
* 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>
#include <mach/mmc.h>
#include <mach/emac.h>
#include <mach/common.h>
#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 at24_platform_data eeprom_info = {
.byte_len = (256*1024) / 8,
.page_size = 64,
.flags = AT24_FLAG_ADDR16,
.setup = davinci_get_mac_addr,
.context = (void *)0x7f00,
};
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;
}
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
