306 lines
6.9 KiB
C
306 lines
6.9 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 <linux/pwm.h>
|
|
#include <linux/leds_pwm.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/setup.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 macb_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 (IS_ERR(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)
|
|
},
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_LEDS_PWM)
|
|
static struct pwm_lookup pwm_lookup[] = {
|
|
PWM_LOOKUP("at91sam9rl-pwm", 0, "leds_pwm", "backlight",
|
|
5000, PWM_POLARITY_NORMAL),
|
|
};
|
|
|
|
static struct led_pwm pwm_leds[] = {
|
|
{
|
|
.name = "backlight",
|
|
.max_brightness = 255,
|
|
},
|
|
};
|
|
|
|
static struct led_pwm_platform_data pwm_data = {
|
|
.num_leds = ARRAY_SIZE(pwm_leds),
|
|
.leds = pwm_leds,
|
|
};
|
|
|
|
static struct platform_device leds_pwm = {
|
|
.name = "leds_pwm",
|
|
.id = -1,
|
|
.dev = {
|
|
.platform_data = &pwm_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, ð_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);
|
|
|
|
#if IS_ENABLED(CONFIG_LEDS_PWM)
|
|
pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup));
|
|
at32_add_device_pwm((1 << 0) | (1 << 2));
|
|
platform_device_register(&leds_pwm);
|
|
#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);
|