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authorHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>2008-07-29 09:25:37 +0000
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-10-13 16:01:18 +0200
commit45c349b58c58f3922bfdec917aa30ff8425caa3f (patch)
tree1a120cdf16ebd97e0084e12a53a0ec6519d5c0a1 /arch/avr32/boards/favr-32/setup.c
parenta3bee42f058c2f9fe281df942eff397924630a12 (diff)
avr32: add support for EarthLCD Favr-32 board
This patch adds support for the Favr-32 board made by EarthLCD. This kit, which is also called ezLCD-101, has a 10.4" touch screen LCD panel, 16 MB 32-bit SDRAM, 8 MB parallel flash, Ethernet, audio out, USB device, SD-card slot, USART and various other connectors for cennecting stuff to SPI, I2C, GPIO, etc. Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32/boards/favr-32/setup.c')
-rw-r--r--arch/avr32/boards/favr-32/setup.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/arch/avr32/boards/favr-32/setup.c b/arch/avr32/boards/favr-32/setup.c
new file mode 100644
index 000000000000..7538f3d2b9e0
--- /dev/null
+++ b/arch/avr32/boards/favr-32/setup.c
@@ -0,0 +1,352 @@
+/*
+ * 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, &eth_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);