367 lines
8.3 KiB
C
367 lines
8.3 KiB
C
/*
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* Favr-32 board-specific setup code.
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*
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* Copyright (C) 2008 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/etherdevice.h>
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#include <linux/bootmem.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <linux/linkage.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/atmel-mci.h>
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#include <linux/pwm.h>
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#include <linux/pwm_backlight.h>
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#include <linux/regulator/fixed.h>
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#include <linux/regulator/machine.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/ads7846.h>
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#include <sound/atmel-abdac.h>
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#include <video/atmel_lcdc.h>
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#include <asm/setup.h>
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#include <mach/at32ap700x.h>
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#include <mach/init.h>
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#include <mach/board.h>
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#include <mach/portmux.h>
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#define PWM_BL_CH 2
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/* Oscillator frequencies. These are board-specific */
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unsigned long at32_board_osc_rates[3] = {
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[0] = 32768, /* 32.768 kHz on RTC osc */
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[1] = 20000000, /* 20 MHz on osc0 */
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[2] = 12000000, /* 12 MHz on osc1 */
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};
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/* Initialized by bootloader-specific startup code. */
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struct tag *bootloader_tags __initdata;
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static struct atmel_abdac_pdata __initdata abdac0_data = {
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};
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struct eth_addr {
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u8 addr[6];
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};
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static struct eth_addr __initdata hw_addr[1];
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static struct macb_platform_data __initdata eth_data[1] = {
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{
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.phy_mask = ~(1U << 1),
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},
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};
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static int ads7843_get_pendown_state(void)
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{
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return !gpio_get_value(GPIO_PIN_PB(3));
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}
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static struct ads7846_platform_data ads7843_data = {
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.model = 7843,
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.get_pendown_state = ads7843_get_pendown_state,
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.pressure_max = 255,
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/*
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* Values below are for debounce filtering, these can be experimented
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* with further.
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*/
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.debounce_max = 20,
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.debounce_rep = 4,
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.debounce_tol = 5,
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.keep_vref_on = true,
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.settle_delay_usecs = 500,
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.penirq_recheck_delay_usecs = 100,
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};
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static struct spi_board_info __initdata spi1_board_info[] = {
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{
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/* ADS7843 touch controller */
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.modalias = "ads7846",
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.max_speed_hz = 2000000,
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.chip_select = 0,
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.bus_num = 1,
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.platform_data = &ads7843_data,
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},
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};
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static struct mci_platform_data __initdata mci0_data = {
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.slot[0] = {
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.bus_width = 4,
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.detect_pin = -ENODEV,
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.wp_pin = -ENODEV,
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},
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};
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static struct fb_videomode __initdata lb104v03_modes[] = {
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{
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.name = "640x480 @ 50",
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.refresh = 50,
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.xres = 640, .yres = 480,
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.pixclock = KHZ2PICOS(25100),
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.left_margin = 90, .right_margin = 70,
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.upper_margin = 30, .lower_margin = 15,
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.hsync_len = 12, .vsync_len = 2,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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};
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static struct fb_monspecs __initdata favr32_default_monspecs = {
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.manufacturer = "LG",
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.monitor = "LB104V03",
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.modedb = lb104v03_modes,
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.modedb_len = ARRAY_SIZE(lb104v03_modes),
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.hfmin = 27273,
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.hfmax = 31111,
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.vfmin = 45,
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.vfmax = 60,
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.dclkmax = 28000000,
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};
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struct atmel_lcdfb_pdata __initdata favr32_lcdc_data = {
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.default_bpp = 16,
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.default_dmacon = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
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.default_lcdcon2 = (ATMEL_LCDC_DISTYPE_TFT
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| ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
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| ATMEL_LCDC_MEMOR_BIG),
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.default_monspecs = &favr32_default_monspecs,
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.guard_time = 2,
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};
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static struct gpio_led favr32_leds[] = {
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{
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.name = "green",
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.gpio = GPIO_PIN_PE(19),
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.default_trigger = "heartbeat",
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.active_low = 1,
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},
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{
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.name = "red",
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.gpio = GPIO_PIN_PE(20),
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.active_low = 1,
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},
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};
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static struct gpio_led_platform_data favr32_led_data = {
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.num_leds = ARRAY_SIZE(favr32_leds),
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.leds = favr32_leds,
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};
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static struct platform_device favr32_led_dev = {
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.name = "leds-gpio",
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.id = 0,
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.dev = {
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.platform_data = &favr32_led_data,
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},
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};
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/*
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* The next two functions should go away as the boot loader is
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* supposed to initialize the macb address registers with a valid
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* ethernet address. But we need to keep it around for a while until
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* we can be reasonably sure the boot loader does this.
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*
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* The phy_id is ignored as the driver will probe for it.
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*/
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static int __init parse_tag_ethernet(struct tag *tag)
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{
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int i;
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i = tag->u.ethernet.mac_index;
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if (i < ARRAY_SIZE(hw_addr))
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memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
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sizeof(hw_addr[i].addr));
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return 0;
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}
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__tagtable(ATAG_ETHERNET, parse_tag_ethernet);
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static void __init set_hw_addr(struct platform_device *pdev)
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{
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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const u8 *addr;
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void __iomem *regs;
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struct clk *pclk;
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if (!res)
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return;
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if (pdev->id >= ARRAY_SIZE(hw_addr))
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return;
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addr = hw_addr[pdev->id].addr;
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if (!is_valid_ether_addr(addr))
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return;
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/*
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* Since this is board-specific code, we'll cheat and use the
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* physical address directly as we happen to know that it's
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* the same as the virtual address.
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*/
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regs = (void __iomem __force *)res->start;
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pclk = clk_get(&pdev->dev, "pclk");
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if (IS_ERR(pclk))
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return;
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clk_enable(pclk);
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__raw_writel((addr[3] << 24) | (addr[2] << 16)
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| (addr[1] << 8) | addr[0], regs + 0x98);
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__raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
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clk_disable(pclk);
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clk_put(pclk);
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}
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void __init favr32_setup_leds(void)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE(favr32_leds); i++)
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at32_select_gpio(favr32_leds[i].gpio, AT32_GPIOF_OUTPUT);
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platform_device_register(&favr32_led_dev);
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}
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static struct pwm_lookup pwm_lookup[] = {
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PWM_LOOKUP("at91sam9rl-pwm", PWM_BL_CH, "pwm-backlight.0", NULL,
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5000, PWM_POLARITY_INVERSED),
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};
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static struct regulator_consumer_supply fixed_power_consumers[] = {
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REGULATOR_SUPPLY("power", "pwm-backlight.0"),
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};
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static struct platform_pwm_backlight_data pwm_bl_data = {
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.enable_gpio = GPIO_PIN_PA(28),
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.max_brightness = 255,
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.dft_brightness = 255,
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.lth_brightness = 50,
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};
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static struct platform_device pwm_bl_device = {
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.name = "pwm-backlight",
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.dev = {
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.platform_data = &pwm_bl_data,
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},
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};
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static void __init favr32_setup_atmel_pwm_bl(void)
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{
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pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup));
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regulator_register_always_on(0, "fixed", fixed_power_consumers,
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ARRAY_SIZE(fixed_power_consumers), 3300000);
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platform_device_register(&pwm_bl_device);
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at32_select_gpio(pwm_bl_data.enable_gpio, 0);
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}
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void __init setup_board(void)
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{
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at32_map_usart(3, 0, 0); /* USART 3 => /dev/ttyS0 */
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at32_setup_serial_console(0);
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}
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static int __init set_abdac_rate(struct platform_device *pdev)
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{
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int retval;
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struct clk *osc1;
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struct clk *pll1;
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struct clk *abdac;
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if (pdev == NULL)
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return -ENXIO;
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osc1 = clk_get(NULL, "osc1");
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if (IS_ERR(osc1)) {
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retval = PTR_ERR(osc1);
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goto out;
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}
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pll1 = clk_get(NULL, "pll1");
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if (IS_ERR(pll1)) {
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retval = PTR_ERR(pll1);
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goto out_osc1;
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}
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abdac = clk_get(&pdev->dev, "sample_clk");
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if (IS_ERR(abdac)) {
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retval = PTR_ERR(abdac);
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goto out_pll1;
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}
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retval = clk_set_parent(pll1, osc1);
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if (retval != 0)
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goto out_abdac;
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/*
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* Rate is 32000 to 50000 and ABDAC oversamples 256x. Multiply, in
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* power of 2, to a value above 80 MHz. Power of 2 so it is possible
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* for the generic clock to divide it down again and 80 MHz is the
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* lowest frequency for the PLL.
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*/
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retval = clk_round_rate(pll1,
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CONFIG_BOARD_FAVR32_ABDAC_RATE * 256 * 16);
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if (retval <= 0) {
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retval = -EINVAL;
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goto out_abdac;
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}
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retval = clk_set_rate(pll1, retval);
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if (retval != 0)
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goto out_abdac;
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retval = clk_set_parent(abdac, pll1);
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if (retval != 0)
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goto out_abdac;
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out_abdac:
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clk_put(abdac);
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out_pll1:
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clk_put(pll1);
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out_osc1:
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clk_put(osc1);
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out:
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return retval;
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}
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static int __init favr32_init(void)
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{
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/*
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* Favr-32 uses 32-bit SDRAM interface. Reserve the SDRAM-specific
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* pins so that nobody messes with them.
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*/
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at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
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at32_select_gpio(GPIO_PIN_PB(3), 0); /* IRQ from ADS7843 */
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at32_add_device_usart(0);
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set_hw_addr(at32_add_device_eth(0, ð_data[0]));
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spi1_board_info[0].irq = gpio_to_irq(GPIO_PIN_PB(3));
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set_abdac_rate(at32_add_device_abdac(0, &abdac0_data));
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at32_add_device_pwm(1 << PWM_BL_CH);
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at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
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at32_add_device_mci(0, &mci0_data);
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at32_add_device_usba(0, NULL);
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at32_add_device_lcdc(0, &favr32_lcdc_data, fbmem_start, fbmem_size, 0);
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favr32_setup_leds();
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favr32_setup_atmel_pwm_bl();
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return 0;
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}
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postcore_initcall(favr32_init);
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