Add Merisc board support
Merisc is the family name for a range of AVR32-based boards.
The boards are designed to be used in a man-machine interfacing
environment, utilizing a touch-based graphical user interface. They host
a vast range of I/O peripherals as well as a large SDRAM & Flash memory
bank.
For more information see: http://www.martinsson.se/merisc
Signed-off-by: Jonas Larsson <jonas.larsson@martinsson.se>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
diff --git a/arch/avr32/boards/merisc/setup.c b/arch/avr32/boards/merisc/setup.c
new file mode 100644
index 0000000..2dbca46
--- /dev/null
+++ b/arch/avr32/boards/merisc/setup.c
@@ -0,0 +1,289 @@
+/*
+ * Board-specific setup code for the Merisc
+ *
+ * Copyright (C) 2008 Martinsson Elektronik AB
+ *
+ * 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/i2c.h>
+#include <linux/i2c-gpio.h>
+#include <linux/gpio.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/leds.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
+#include <linux/irq.h>
+#include <linux/fb.h>
+#include <linux/atmel-mci.h>
+
+#include <asm/io.h>
+#include <asm/setup.h>
+#include <asm/gpio.h>
+
+#include <mach/at32ap700x.h>
+#include <mach/board.h>
+#include <mach/init.h>
+#include <mach/portmux.h>
+
+#include "merisc.h"
+
+/* Holds the autodetected board model and revision */
+static int merisc_board_id;
+
+/* Initialized by bootloader-specific startup code. */
+struct tag *bootloader_tags __initdata;
+
+/* 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 */
+};
+
+struct eth_addr {
+ u8 addr[6];
+};
+
+static struct eth_addr __initdata hw_addr[2];
+static struct eth_platform_data __initdata eth_data[2];
+
+static int ads7846_get_pendown_state_PB26(void)
+{
+ return !gpio_get_value(GPIO_PIN_PB(26));
+}
+
+static int ads7846_get_pendown_state_PB28(void)
+{
+ return !gpio_get_value(GPIO_PIN_PB(28));
+}
+
+static struct ads7846_platform_data __initdata ads7846_data = {
+ .model = 7846,
+ .vref_delay_usecs = 100,
+ .vref_mv = 0,
+ .keep_vref_on = 0,
+ .settle_delay_usecs = 150,
+ .penirq_recheck_delay_usecs = 1,
+ .x_plate_ohms = 800,
+ .debounce_rep = 4,
+ .debounce_max = 10,
+ .debounce_tol = 50,
+ .get_pendown_state = ads7846_get_pendown_state_PB26,
+ .filter_init = NULL,
+ .filter = NULL,
+ .filter_cleanup = NULL,
+};
+
+static struct spi_board_info __initdata spi0_board_info[] = {
+ {
+ .modalias = "ads7846",
+ .max_speed_hz = 3250000,
+ .chip_select = 0,
+ .bus_num = 0,
+ .platform_data = &ads7846_data,
+ .mode = SPI_MODE_0,
+ },
+};
+
+static struct mci_platform_data __initdata mci0_data = {
+ .slot[0] = {
+ .bus_width = 4,
+ .detect_pin = GPIO_PIN_PE(19),
+ .wp_pin = GPIO_PIN_PE(20),
+ },
+};
+
+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;
+
+ 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);
+}
+
+static struct i2c_gpio_platform_data i2c_gpio_data = {
+ .sda_pin = GPIO_PIN_PA(6),
+ .scl_pin = GPIO_PIN_PA(7),
+ .sda_is_open_drain = 1,
+ .scl_is_open_drain = 1,
+ .udelay = 2,
+};
+
+static struct platform_device i2c_gpio_device = {
+ .name = "i2c-gpio",
+ .id = 0,
+ .dev = {
+ .platform_data = &i2c_gpio_data,
+ },
+};
+
+#ifdef CONFIG_LEDS_ATMEL_PWM
+static struct gpio_led stk_pwm_led[] = {
+ {
+ .name = "backlight",
+ .gpio = 0, /* PWM channel 0 (LCD backlight) */
+ },
+};
+
+static struct gpio_led_platform_data stk_pwm_led_data = {
+ .num_leds = ARRAY_SIZE(stk_pwm_led),
+ .leds = stk_pwm_led,
+};
+
+static struct platform_device stk_pwm_led_dev = {
+ .name = "leds-atmel-pwm",
+ .id = -1,
+ .dev = {
+ .platform_data = &stk_pwm_led_data,
+ },
+};
+#endif
+
+const char *merisc_model(void)
+{
+ switch (merisc_board_id) {
+ case 0:
+ case 1:
+ return "500-01";
+ case 2:
+ return "BT";
+ default:
+ return "Unknown";
+ }
+}
+
+const char *merisc_revision(void)
+{
+ switch (merisc_board_id) {
+ case 0:
+ return "B";
+ case 1:
+ return "D";
+ case 2:
+ return "A";
+ default:
+ return "Unknown";
+ }
+}
+
+static void detect_merisc_board_id(void)
+{
+ /* Board ID pins MUST be set as input or the board may be damaged */
+ at32_select_gpio(GPIO_PIN_PA(24), AT32_GPIOF_PULLUP);
+ at32_select_gpio(GPIO_PIN_PA(25), AT32_GPIOF_PULLUP);
+ at32_select_gpio(GPIO_PIN_PA(26), AT32_GPIOF_PULLUP);
+ at32_select_gpio(GPIO_PIN_PA(27), AT32_GPIOF_PULLUP);
+
+ merisc_board_id = !gpio_get_value(GPIO_PIN_PA(24)) +
+ !gpio_get_value(GPIO_PIN_PA(25)) * 2 +
+ !gpio_get_value(GPIO_PIN_PA(26)) * 4 +
+ !gpio_get_value(GPIO_PIN_PA(27)) * 8;
+}
+
+void __init setup_board(void)
+{
+ at32_map_usart(0, 0);
+ at32_map_usart(1, 1);
+ at32_map_usart(3, 3);
+ at32_setup_serial_console(1);
+}
+
+static int __init merisc_init(void)
+{
+ detect_merisc_board_id();
+
+ printk(KERN_NOTICE "BOARD: Merisc %s revision %s\n", merisc_model(),
+ merisc_revision());
+
+ /* Reserve pins for SDRAM */
+ at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL | (1 << 26));
+
+ if (merisc_board_id >= 1)
+ at32_map_usart(2, 2);
+
+ at32_add_device_usart(0);
+ at32_add_device_usart(1);
+ if (merisc_board_id >= 1)
+ at32_add_device_usart(2);
+ at32_add_device_usart(3);
+ set_hw_addr(at32_add_device_eth(0, ð_data[0]));
+
+ /* ADS7846 PENIRQ */
+ if (merisc_board_id == 0) {
+ ads7846_data.get_pendown_state = ads7846_get_pendown_state_PB26;
+ at32_select_periph(GPIO_PIOB_BASE, 1 << 26,
+ GPIO_PERIPH_A, AT32_GPIOF_PULLUP);
+ spi0_board_info[0].irq = AT32_EXTINT(1);
+ } else {
+ ads7846_data.get_pendown_state = ads7846_get_pendown_state_PB28;
+ at32_select_periph(GPIO_PIOB_BASE, 1 << 28, GPIO_PERIPH_A,
+ AT32_GPIOF_PULLUP);
+ spi0_board_info[0].irq = AT32_EXTINT(3);
+ }
+
+ /* ADS7846 busy pin */
+ at32_select_gpio(GPIO_PIN_PA(4), AT32_GPIOF_PULLUP);
+
+ at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
+
+ at32_add_device_mci(0, &mci0_data);
+
+#ifdef CONFIG_LEDS_ATMEL_PWM
+ at32_add_device_pwm((1 << 0) | (1 << 2));
+ platform_device_register(&stk_pwm_led_dev);
+#else
+ at32_add_device_pwm((1 << 2));
+#endif
+
+ at32_select_gpio(i2c_gpio_data.sda_pin,
+ AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+ at32_select_gpio(i2c_gpio_data.scl_pin,
+ AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+ platform_device_register(&i2c_gpio_device);
+
+ return 0;
+}
+postcore_initcall(merisc_init);