/*
* Favr-32 board-specific setup code.
*
* Copyright (C) 2008 Atmel Corporation
*
* 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/bootmem.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/linkage.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/atmel-pwm-bl.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <video/atmel_lcdc.h>
#include <asm/setup.h>
#include <asm/arch/at32ap700x.h>
#include <asm/arch/init.h>
#include <asm/arch/board.h>
#include <asm/arch/portmux.h>
/* 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 */
};
/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;
struct eth_addr {
u8 addr[6];
};
static struct eth_addr __initdata hw_addr[1];
static struct eth_platform_data __initdata eth_data[1] = {
{
.phy_mask = ~(1U << 1),
},
};
static int ads7843_get_pendown_state(void)
{
return !gpio_get_value(GPIO_PIN_PB(3));
}
static struct ads7846_platform_data ads7843_data = {
.model = 7843,
.get_pendown_state = ads7843_get_pendown_state,
.pressure_max = 255,
/*
* Values below are for debounce filtering, these can be experimented
* with further.
*/
.debounce_max = 20,
.debounce_rep = 4,
.debounce_tol = 5,
};
static struct spi_board_info __initdata spi1_board_info[] = {
{
/* ADS7843 touch controller */
.modalias = "ads7846",
.max_speed_hz = 2000000,
.chip_select = 0,
.bus_num = 1,
.platform_data = &ads7843_data,
},
};
static struct fb_videomode __initdata lb104v03_modes[] = {
{
.name = "640x480 @ 50",
.refresh = 50,
.xres = 640, .yres = 480,
.pixclock = KHZ2PICOS(25100),
.left_margin = 90, .right_margin = 70,
.upper_margin = 30, .lower_margin = 15,
.hsync_len = 12, .vsync_len = 2,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
},
};
static struct fb_monspecs __initdata favr32_default_monspecs = {
.manufacturer = "LG",
.monitor = "LB104V03",
.modedb = lb104v03_modes,
.modedb_len = ARRAY_SIZE(lb104v03_modes),
.hfmin = 27273,
.hfmax = 31111,
.vfmin = 45,
.vfmax = 60,
.dclkmax = 28000000,
};
struct atmel_lcdfb_info __initdata favr32_lcdc_data = {
.default_bpp = 16,
.default_dmacon = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
.default_lcdcon2 = (ATMEL_LCDC_DISTYPE_TFT
| ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
| ATMEL_LCDC_MEMOR_BIG),
.default_monspecs = &favr32_default_monspecs,
.guard_time = 2,
};
static struct gpio_led favr32_leds[] = {
{
.name = "green",
.gpio = GPIO_PIN_PE(19),
.default_trigger = "heartbeat",
.active_low = 1,
},
{
.name = "red",
.gpio = GPIO_PIN_PE(20),
.active_low = 1,
},
};
static struct gpio_led_platform_data favr32_led_data = {
.num_leds = ARRAY_SIZE(favr32_leds),
.leds = favr32_leds,
};
static struct platform_device favr32_led_dev = {
.name = "leds-gpio",
.id = 0,
.dev = {
.platform_data = &favr32_led_data,
},
};
/*
* The next two functions should go away as the boot loader is
* supposed to initialize the macb address registers with a valid
* ethernet address. But we need to keep it around for a while until
* we can be reasonably sure the boot loader does this.
*
* The phy_id is ignored as the driver will probe for it.
*/
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;
/*
* Since this is board-specific code, we'll cheat and use the
* physical address directly as we happen to know that it's
* the same as the virtual address.
*/
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);
}
void __init favr32_setup_leds(void)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(favr32_leds); i++)
at32_select_gpio(favr32_leds[i].gpio, AT32_GPIOF_OUTPUT);
platform_device_register(&favr32_led_dev);
}
static struct atmel_pwm_bl_platform_data atmel_pwm_bl_pdata = {
.pwm_channel = 2,
.pwm_frequency = 200000,
.pwm_compare_max = 345,
.pwm_duty_max = 345,
.pwm_duty_min = 90,
.pwm_active_low = 1,
.gpio_on = GPIO_PIN_PA(28),
.on_active_low = 0,
};
static struct platform_device atmel_pwm_bl_dev = {
.name = "atmel-pwm-bl",
.id = 0,
.dev = {
.platform_data = &atmel_pwm_bl_pdata,
},
};
static void __init favr32_setup_atmel_pwm_bl(void)
{
platform_device_register(&atmel_pwm_bl_dev);
at32_select_gpio(atmel_pwm_bl_pdata.gpio_on, 0);
}
void __init setup_board(void)
{
at32_map_usart(3, 0); /* USART 3 => /dev/ttyS0 */
at32_setup_serial_console(0);
}
static int __init set_abdac_rate(struct platform_device *pdev)
{
int retval;
struct clk *osc1;
struct clk *pll1;
struct clk *abdac;
if (pdev == NULL)
return -ENXIO;
osc1 = clk_get(NULL, "osc1");
if (IS_ERR(osc1)) {
retval = PTR_ERR(osc1);
goto out;
}
pll1 = clk_get(NULL, "pll1");
if (IS_ERR(pll1)) {
retval = PTR_ERR(pll1);
goto out_osc1;
}
abdac = clk_get(&pdev->dev, "sample_clk");
if (IS_ERR(abdac)) {
retval = PTR_ERR(abdac);
goto out_pll1;
}
retval = clk_set_parent(pll1, osc1);
if (retval != 0)
goto out_abdac;
/*
* Rate is 32000 to 50000 and ABDAC oversamples 256x. Multiply, in
* power of 2, to a value above 80 MHz. Power of 2 so it is possible
* for the generic clock to divide it down again and 80 MHz is the
* lowest frequency for the PLL.
*/
retval = clk_round_rate(pll1,
CONFIG_BOARD_FAVR32_ABDAC_RATE * 256 * 16);
if (retval < 0)
goto out_abdac;
retval = clk_set_rate(pll1, retval);
if (retval != 0)
goto out_abdac;
retval = clk_set_parent(abdac, pll1);
if (retval != 0)
goto out_abdac;
out_abdac:
clk_put(abdac);
out_pll1:
clk_put(pll1);
out_osc1:
clk_put(osc1);
out:
return retval;
}
static int __init favr32_init(void)
{
/*
* Favr-32 uses 32-bit SDRAM interface. Reserve the SDRAM-specific
* pins so that nobody messes with them.
*/
at32_reserve_pin(GPIO_PIN_PE(0)); /* DATA[16] */
at32_reserve_pin(GPIO_PIN_PE(1)); /* DATA[17] */
at32_reserve_pin(GPIO_PIN_PE(2)); /* DATA[18] */
at32_reserve_pin(GPIO_PIN_PE(3)); /* DATA[19] */
at32_reserve_pin(GPIO_PIN_PE(4)); /* DATA[20] */
at32_reserve_pin(GPIO_PIN_PE(5)); /* DATA[21] */
at32_reserve_pin(GPIO_PIN_PE(6)); /* DATA[22] */
at32_reserve_pin(GPIO_PIN_PE(7)); /* DATA[23] */
at32_reserve_pin(GPIO_PIN_PE(8)); /* DATA[24] */
at32_reserve_pin(GPIO_PIN_PE(9)); /* DATA[25] */
at32_reserve_pin(GPIO_PIN_PE(10)); /* DATA[26] */
at32_reserve_pin(GPIO_PIN_PE(11)); /* DATA[27] */
at32_reserve_pin(GPIO_PIN_PE(12)); /* DATA[28] */
at32_reserve_pin(GPIO_PIN_PE(13)); /* DATA[29] */
at32_reserve_pin(GPIO_PIN_PE(14)); /* DATA[30] */
at32_reserve_pin(GPIO_PIN_PE(15)); /* DATA[31] */
at32_reserve_pin(GPIO_PIN_PE(26)); /* SDCS */
at32_select_gpio(GPIO_PIN_PB(3), 0); /* IRQ from ADS7843 */
at32_add_system_devices();
at32_add_device_usart(0);
set_hw_addr(at32_add_device_eth(0, ð_data[0]));
spi1_board_info[0].irq = gpio_to_irq(GPIO_PIN_PB(3));
set_abdac_rate(at32_add_device_abdac(0));
at32_add_device_pwm(1 << atmel_pwm_bl_pdata.pwm_channel);
at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
at32_add_device_mci(0, NULL);
at32_add_device_usba(0, NULL);
at32_add_device_lcdc(0, &favr32_lcdc_data, fbmem_start, fbmem_size, 0);
favr32_setup_leds();
favr32_setup_atmel_pwm_bl();
return 0;
}
postcore_initcall(favr32_init);
