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>

4 files changed, 473 insertions, 0 deletions

diff --git a/arch/avr32/boards/favr-32/Kconfig b/arch/avr32/boards/favr-32/Kconfig
new file mode 100644
index 000000000000..2c83d1ddcaec
--- /dev/null
+++ b/arch/avr32/boards/favr-32/Kconfig
@@ -0,0 +1,22 @@
+# 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
diff --git a/arch/avr32/boards/favr-32/Makefile b/arch/avr32/boards/favr-32/Makefile
new file mode 100644
index 000000000000..234f21508e4b
--- /dev/null
+++ b/arch/avr32/boards/favr-32/Makefile
@@ -0,0 +1 @@
+obj-y   += setup.o flash.o
diff --git a/arch/avr32/boards/favr-32/flash.c b/arch/avr32/boards/favr-32/flash.c
new file mode 100644
index 000000000000..5f139b7cb5f7
--- /dev/null
+++ b/arch/avr32/boards/favr-32/flash.c
@@ -0,0 +1,98 @@
+/*
+ * 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);
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);