linux/arch/avr32/boards/merisc/setup.c
Jonas Larsson 7ebcfcf197 avr32: Solves problem with inverted MCI detect pin on Merisc board
Same patch as before, modified to use bool.

This patch solves the problem with the inverted mci detect pin on Merisc
boards.

Signed-off-by: Jonas Larsson <jonas.larsson@martinsson.se>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-04-08 20:48:02 +02:00

299 lines
6.7 KiB
C

/*
* Board-specific setup code for the Merisc
*
* Copyright (C) 2008 Martinsson Elektronik AB
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/etherdevice.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/leds.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <linux/irq.h>
#include <linux/fb.h>
#include <linux/atmel-mci.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/gpio.h>
#include <mach/at32ap700x.h>
#include <mach/board.h>
#include <mach/init.h>
#include <mach/portmux.h>
#include "merisc.h"
/* Holds the autodetected board model and revision */
static int merisc_board_id;
/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;
/* Oscillator frequencies. These are board specific */
unsigned long at32_board_osc_rates[3] = {
[0] = 32768, /* 32.768 kHz on RTC osc */
[1] = 20000000, /* 20 MHz on osc0 */
[2] = 12000000, /* 12 MHz on osc1 */
};
struct eth_addr {
u8 addr[6];
};
static struct eth_addr __initdata hw_addr[2];
static struct eth_platform_data __initdata eth_data[2];
static int ads7846_get_pendown_state_PB26(void)
{
return !gpio_get_value(GPIO_PIN_PB(26));
}
static int ads7846_get_pendown_state_PB28(void)
{
return !gpio_get_value(GPIO_PIN_PB(28));
}
static struct ads7846_platform_data __initdata ads7846_data = {
.model = 7846,
.vref_delay_usecs = 100,
.vref_mv = 0,
.keep_vref_on = 0,
.settle_delay_usecs = 150,
.penirq_recheck_delay_usecs = 1,
.x_plate_ohms = 800,
.debounce_rep = 4,
.debounce_max = 10,
.debounce_tol = 50,
.get_pendown_state = ads7846_get_pendown_state_PB26,
.filter_init = NULL,
.filter = NULL,
.filter_cleanup = NULL,
};
static struct spi_board_info __initdata spi0_board_info[] = {
{
.modalias = "ads7846",
.max_speed_hz = 3250000,
.chip_select = 0,
.bus_num = 0,
.platform_data = &ads7846_data,
.mode = SPI_MODE_0,
},
};
static struct mci_platform_data __initdata mci0_data = {
.slot[0] = {
.bus_width = 4,
.detect_pin = GPIO_PIN_PE(19),
.wp_pin = GPIO_PIN_PE(20),
.detect_is_active_high = true,
},
};
static int __init parse_tag_ethernet(struct tag *tag)
{
int i;
i = tag->u.ethernet.mac_index;
if (i < ARRAY_SIZE(hw_addr)) {
memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
sizeof(hw_addr[i].addr));
}
return 0;
}
__tagtable(ATAG_ETHERNET, parse_tag_ethernet);
static void __init set_hw_addr(struct platform_device *pdev)
{
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
const u8 *addr;
void __iomem *regs;
struct clk *pclk;
if (!res)
return;
if (pdev->id >= ARRAY_SIZE(hw_addr))
return;
addr = hw_addr[pdev->id].addr;
if (!is_valid_ether_addr(addr))
return;
regs = (void __iomem __force *)res->start;
pclk = clk_get(&pdev->dev, "pclk");
if (!pclk)
return;
clk_enable(pclk);
__raw_writel((addr[3] << 24) | (addr[2] << 16)
| (addr[1] << 8) | addr[0], regs + 0x98);
__raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
clk_disable(pclk);
clk_put(pclk);
}
static struct i2c_gpio_platform_data i2c_gpio_data = {
.sda_pin = GPIO_PIN_PA(6),
.scl_pin = GPIO_PIN_PA(7),
.sda_is_open_drain = 1,
.scl_is_open_drain = 1,
.udelay = 2,
};
static struct platform_device i2c_gpio_device = {
.name = "i2c-gpio",
.id = 0,
.dev = {
.platform_data = &i2c_gpio_data,
},
};
static struct i2c_board_info __initdata i2c_info[] = {
{
I2C_BOARD_INFO("pcf8563", 0x51)
},
};
#ifdef CONFIG_LEDS_ATMEL_PWM
static struct gpio_led stk_pwm_led[] = {
{
.name = "backlight",
.gpio = 0, /* PWM channel 0 (LCD backlight) */
},
};
static struct gpio_led_platform_data stk_pwm_led_data = {
.num_leds = ARRAY_SIZE(stk_pwm_led),
.leds = stk_pwm_led,
};
static struct platform_device stk_pwm_led_dev = {
.name = "leds-atmel-pwm",
.id = -1,
.dev = {
.platform_data = &stk_pwm_led_data,
},
};
#endif
const char *merisc_model(void)
{
switch (merisc_board_id) {
case 0:
case 1:
return "500-01";
case 2:
return "BT";
default:
return "Unknown";
}
}
const char *merisc_revision(void)
{
switch (merisc_board_id) {
case 0:
return "B";
case 1:
return "D";
case 2:
return "A";
default:
return "Unknown";
}
}
static void detect_merisc_board_id(void)
{
/* Board ID pins MUST be set as input or the board may be damaged */
at32_select_gpio(GPIO_PIN_PA(24), AT32_GPIOF_PULLUP);
at32_select_gpio(GPIO_PIN_PA(25), AT32_GPIOF_PULLUP);
at32_select_gpio(GPIO_PIN_PA(26), AT32_GPIOF_PULLUP);
at32_select_gpio(GPIO_PIN_PA(27), AT32_GPIOF_PULLUP);
merisc_board_id = !gpio_get_value(GPIO_PIN_PA(24)) +
!gpio_get_value(GPIO_PIN_PA(25)) * 2 +
!gpio_get_value(GPIO_PIN_PA(26)) * 4 +
!gpio_get_value(GPIO_PIN_PA(27)) * 8;
}
void __init setup_board(void)
{
at32_map_usart(0, 0, 0);
at32_map_usart(1, 1, 0);
at32_map_usart(3, 3, 0);
at32_setup_serial_console(1);
}
static int __init merisc_init(void)
{
detect_merisc_board_id();
printk(KERN_NOTICE "BOARD: Merisc %s revision %s\n", merisc_model(),
merisc_revision());
/* Reserve pins for SDRAM */
at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL | (1 << 26));
if (merisc_board_id >= 1)
at32_map_usart(2, 2, 0);
at32_add_device_usart(0);
at32_add_device_usart(1);
if (merisc_board_id >= 1)
at32_add_device_usart(2);
at32_add_device_usart(3);
set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
/* ADS7846 PENIRQ */
if (merisc_board_id == 0) {
ads7846_data.get_pendown_state = ads7846_get_pendown_state_PB26;
at32_select_periph(GPIO_PIOB_BASE, 1 << 26,
GPIO_PERIPH_A, AT32_GPIOF_PULLUP);
spi0_board_info[0].irq = AT32_EXTINT(1);
} else {
ads7846_data.get_pendown_state = ads7846_get_pendown_state_PB28;
at32_select_periph(GPIO_PIOB_BASE, 1 << 28, GPIO_PERIPH_A,
AT32_GPIOF_PULLUP);
spi0_board_info[0].irq = AT32_EXTINT(3);
}
/* ADS7846 busy pin */
at32_select_gpio(GPIO_PIN_PA(4), AT32_GPIOF_PULLUP);
at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
at32_add_device_mci(0, &mci0_data);
#ifdef CONFIG_LEDS_ATMEL_PWM
at32_add_device_pwm((1 << 0) | (1 << 2));
platform_device_register(&stk_pwm_led_dev);
#else
at32_add_device_pwm((1 << 2));
#endif
at32_select_gpio(i2c_gpio_data.sda_pin,
AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
at32_select_gpio(i2c_gpio_data.scl_pin,
AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
platform_device_register(&i2c_gpio_device);
i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
return 0;
}
postcore_initcall(merisc_init);