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>

arch/avr32/Kconfig

@@ -119,10 +119,15 @@ config BOARD_ATSTK1000
 config BOARD_ATNGW100
 	bool "ATNGW100 Network Gateway"
 	select CPU_AT32AP7000
+
+config BOARD_FAVR_32
+	bool "Favr-32 LCD-board"
+	select CPU_AT32AP7000
 endchoice
 
 source "arch/avr32/boards/atstk1000/Kconfig"
 source "arch/avr32/boards/atngw100/Kconfig"
+source "arch/avr32/boards/favr-32/Kconfig"
 
 choice
 	prompt "Boot loader type"

arch/avr32/Makefile

@@ -33,6 +33,7 @@ head-y					+= arch/avr32/kernel/head.o
 core-y					+= $(machdirs)
 core-$(CONFIG_BOARD_ATSTK1000)		+= arch/avr32/boards/atstk1000/
 core-$(CONFIG_BOARD_ATNGW100)		+= arch/avr32/boards/atngw100/
+core-$(CONFIG_BOARD_FAVR_32)		+= arch/avr32/boards/favr-32/
 core-$(CONFIG_LOADER_U_BOOT)		+= arch/avr32/boot/u-boot/
 core-y					+= arch/avr32/kernel/
 core-y					+= arch/avr32/mm/

arch/avr32/boards/favr-32/Kconfig

+# Favr-32 customization
+
+if BOARD_FAVR_32
+
+config BOARD_FAVR32_ABDAC_RATE
+	int "DAC target rate"
+	default 44100
+	range 32000 50000
+	help
+	  Specify the target rate the internal DAC should try to match. This
+	  will use PLL1 to generate a frequency as close as possible to this
+	  rate.
+
+	  Must be within the range 32000 to 50000, which should be suitable to
+	  generate most other frequencies in power of 2 steps.
+
+	  Ex:
+		48000 will also suit 24000 and 12000
+		44100 will also suit 22050 and 11025
+		32000 will also suit 16000 and 8000
+
+endif # BOARD_FAVR_32

arch/avr32/boards/favr-32/Makefile

+obj-y	+= setup.o flash.o

arch/avr32/boards/favr-32/flash.c

+/*
+ * Favr-32 board-specific flash initialization
+ *
+ * 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/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+
+#include <asm/arch/smc.h>
+
+static struct smc_timing flash_timing __initdata = {
+	.ncs_read_setup		= 0,
+	.nrd_setup		= 40,
+	.ncs_write_setup	= 0,
+	.nwe_setup		= 10,
+
+	.ncs_read_pulse		= 80,
+	.nrd_pulse		= 40,
+	.ncs_write_pulse	= 65,
+	.nwe_pulse		= 55,
+
+	.read_cycle		= 120,
+	.write_cycle		= 120,
+};
+
+static struct smc_config flash_config __initdata = {
+	.bus_width		= 2,
+	.nrd_controlled		= 1,
+	.nwe_controlled		= 1,
+	.byte_write		= 1,
+};
+
+static struct mtd_partition flash_parts[] = {
+	{
+		.name           = "u-boot",
+		.offset         = 0x00000000,
+		.size           = 0x00020000,           /* 128 KiB */
+		.mask_flags     = MTD_WRITEABLE,
+	},
+	{
+		.name           = "root",
+		.offset         = 0x00020000,
+		.size           = 0x007d0000,
+	},
+	{
+		.name           = "env",
+		.offset         = 0x007f0000,
+		.size           = 0x00010000,
+		.mask_flags     = MTD_WRITEABLE,
+	},
+};
+
+static struct physmap_flash_data flash_data = {
+	.width		= 2,
+	.nr_parts	= ARRAY_SIZE(flash_parts),
+	.parts		= flash_parts,
+};
+
+static struct resource flash_resource = {
+	.start		= 0x00000000,
+	.end		= 0x007fffff,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.resource	= &flash_resource,
+	.num_resources	= 1,
+	.dev		= {
+		.platform_data = &flash_data,
+	},
+};
+
+/* This needs to be called after the SMC has been initialized */
+static int __init favr32_flash_init(void)
+{
+	int ret;
+
+	smc_set_timing(&flash_config, &flash_timing);
+	ret = smc_set_configuration(0, &flash_config);
+	if (ret < 0) {
+		printk(KERN_ERR "Favr-32: failed to set NOR flash timing\n");
+		return ret;
+	}
+
+	platform_device_register(&flash_device);
+
+	return 0;
+}
+device_initcall(favr32_flash_init);

arch/avr32/boards/favr-32/setup.c

+/*
+ * 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);