avr32: Add MIMC200 board support

Please consider the following patch which adds support for a new AVR32
based board.

The board is closely based on Atmel's NGW100 reference board, but has an
extra 8MByte FLASH and 128KByte FRAM.

Signed-off-by: Mark Jackson <mpfj@mimc.co.uk>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

arch/avr32/Kconfig

@@ -123,6 +123,10 @@ config BOARD_ATNGW100
 config BOARD_FAVR_32
 	bool "Favr-32 LCD-board"
 	select CPU_AT32AP7000
+
+config BOARD_MIMC200
+	bool "MIMC200 CPU board"
+	select CPU_AT32AP7000
 endchoice
 
 source "arch/avr32/boards/atstk1000/Kconfig"

arch/avr32/Makefile

@@ -34,6 +34,7 @@ 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-$(CONFIG_BOARD_MIMC200)		+= arch/avr32/boards/mimc200/
 core-$(CONFIG_LOADER_U_BOOT)		+= arch/avr32/boot/u-boot/
 core-y					+= arch/avr32/kernel/
 core-y					+= arch/avr32/mm/

arch/avr32/boards/mimc200/Makefile

@@ -0,0 +1 @@
+obj-y				+= setup.o flash.o fram.o

arch/avr32/boards/mimc200/flash.c

@@ -0,0 +1,143 @@
+/*
+ * MIMC200 board-specific flash initialization
+ *
+ * Copyright (C) 2008 Mercury IMC Ltd
+ *
+ * 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 <mach/smc.h>
+
+static struct smc_timing flash_timing __initdata = {
+	.ncs_read_setup		= 0,
+	.nrd_setup		= 15,
+	.ncs_write_setup	= 0,
+	.nwe_setup		= 0,
+
+	.ncs_read_pulse		= 115,
+	.nrd_pulse		= 110,
+	.ncs_write_pulse	= 60,
+	.nwe_pulse		= 60,
+
+	.read_cycle		= 115,
+	.write_cycle		= 100,
+};
+
+static struct smc_config flash_config __initdata = {
+	.bus_width		= 2,
+	.nrd_controlled		= 1,
+	.nwe_controlled		= 1,
+	.byte_write		= 1,
+};
+
+/* system flash definition */
+
+static struct mtd_partition flash_parts_system[] = {
+	{
+		.name           = "u-boot",
+		.offset         = 0x00000000,
+		.size           = 0x00020000,           /* 128 KiB */
+		.mask_flags     = MTD_WRITEABLE,
+	},
+	{
+		.name           = "root",
+		.offset         = 0x00020000,
+		.size           = 0x007c0000,
+	},
+	{
+		.name		= "splash",
+		.offset		= 0x007e0000,
+		.size		= 0x00010000,		/* 64KiB */
+	},
+	{
+		.name           = "env",
+		.offset         = 0x007f0000,
+		.size           = 0x00010000,
+		.mask_flags     = MTD_WRITEABLE,
+	},
+};
+
+static struct physmap_flash_data flash_system = {
+	.width		= 2,
+	.nr_parts	= ARRAY_SIZE(flash_parts_system),
+	.parts		= flash_parts_system,
+};
+
+static struct resource flash_resource_system = {
+	.start		= 0x00000000,
+	.end		= 0x007fffff,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device_system = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.resource	= &flash_resource_system,
+	.num_resources	= 1,
+	.dev		= {
+		.platform_data = &flash_system,
+	},
+};
+
+/* data flash definition */
+
+static struct mtd_partition flash_parts_data[] = {
+	{
+		.name		= "data",
+		.offset		= 0x00000000,
+		.size		= 0x00800000,
+	},
+};
+
+static struct physmap_flash_data flash_data = {
+	.width		= 2,
+	.nr_parts	= ARRAY_SIZE(flash_parts_data),
+	.parts		= flash_parts_data,
+};
+
+static struct resource flash_resource_data = {
+	.start		= 0x08000000,
+	.end		= 0x087fffff,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device_data = {
+	.name		= "physmap-flash",
+	.id		= 1,
+	.resource	= &flash_resource_data,
+	.num_resources	= 1,
+	.dev		= {
+		.platform_data = &flash_data,
+	},
+};
+
+/* This needs to be called after the SMC has been initialized */
+static int __init mimc200_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 "mimc200: failed to set 'System' NOR flash timing\n");
+		return ret;
+	}
+	ret = smc_set_configuration(1, &flash_config);
+	if (ret < 0) {
+		printk(KERN_ERR "mimc200: failed to set 'Data' NOR flash timing\n");
+		return ret;
+	}
+
+	platform_device_register(&flash_device_system);
+	platform_device_register(&flash_device_data);
+
+	return 0;
+}
+device_initcall(mimc200_flash_init);

arch/avr32/boards/mimc200/fram.c

@@ -0,0 +1,80 @@
+/*
+ * FRAM driver for MIMC200 board
+ *
+ * Copyright 2008 Mark Jackson <mpfj@mimc.co.uk>
+ *
+ * This module adds *very* simply support for the system's FRAM device.
+ * At the moment, this is hard-coded to the MIMC200 platform, and only
+ * supports mmap().
+ */
+
+#define FRAM_VERSION	"1.0"
+
+#include <linux/miscdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/io.h>
+
+#define FRAM_BASE	0xac000000
+#define FRAM_SIZE	0x20000
+
+/*
+ * The are the file operation function for user access to /dev/fram
+ */
+
+static int fram_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	int ret;
+
+	ret = remap_pfn_range(vma,
+		vma->vm_start,
+		virt_to_phys((void *)((unsigned long)FRAM_BASE)) >> PAGE_SHIFT,
+		vma->vm_end-vma->vm_start,
+		PAGE_SHARED);
+
+	if (ret != 0)
+		return -EAGAIN;
+
+	return 0;
+}
+
+static const struct file_operations fram_fops = {
+	.owner			= THIS_MODULE,
+	.mmap			= fram_mmap,
+};
+
+#define FRAM_MINOR	0
+
+static struct miscdevice fram_dev = {
+	FRAM_MINOR,
+	"fram",
+	&fram_fops
+};
+
+static int __init
+fram_init(void)
+{
+	int ret;
+
+	ret = misc_register(&fram_dev);
+	if (ret) {
+		printk(KERN_ERR "fram: can't misc_register on minor=%d\n",
+		    FRAM_MINOR);
+		return ret;
+	}
+	printk(KERN_INFO "FRAM memory driver v" FRAM_VERSION "\n");
+	return 0;
+}
+
+static void __exit
+fram_cleanup_module(void)
+{
+	misc_deregister(&fram_dev);
+}
+
+module_init(fram_init);
+module_exit(fram_cleanup_module);
+
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS_MISCDEV(FRAM_MINOR);

arch/avr32/boards/mimc200/setup.c

@@ -0,0 +1,237 @@
+/*
+ * Board-specific setup code for the MIMC200
+ *
+ * Copyright (C) 2008 Mercury IMC Ltd
+ *
+ * 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.
+ */
+
+extern struct atmel_lcdfb_info mimc200_lcdc_data;
+
+#include <linux/clk.h>
+#include <linux/etherdevice.h>
+#include <linux/i2c-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/eeprom.h>
+
+#include <video/atmel_lcdc.h>
+#include <linux/fb.h>
+
+#include <asm/atmel-mci.h>
+#include <linux/io.h>
+#include <asm/setup.h>
+
+#include <mach/at32ap700x.h>
+#include <mach/board.h>
+#include <mach/init.h>
+#include <mach/portmux.h>
+
+/* Oscillator frequencies. These are board-specific */
+unsigned long at32_board_osc_rates[3] = {
+	[0] = 32768,	/* 32.768 kHz on RTC osc */
+	[1] = 10000000,	/* 10 MHz on osc0 */
+	[2] = 12000000,	/* 12 MHz on osc1 */
+};
+
+/* Initialized by bootloader-specific startup code. */
+struct tag *bootloader_tags __initdata;
+
+static struct fb_videomode __initdata tx14d14_modes[] = {
+	{
+		.name		= "640x480 @ 60",
+		.refresh	= 60,
+		.xres		= 640,		.yres		= 480,
+		.pixclock	= KHZ2PICOS(11666),
+
+		.left_margin	= 80,		.right_margin	= 1,
+		.upper_margin	= 13,		.lower_margin	= 2,
+		.hsync_len	= 64,		.vsync_len	= 1,
+
+		.sync		= 0,
+		.vmode		= FB_VMODE_NONINTERLACED,
+	},
+};
+
+static struct fb_monspecs __initdata mimc200_default_monspecs = {
+	.manufacturer		= "HIT",
+	.monitor		= "TX14D14VM1BAB",
+	.modedb			= tx14d14_modes,
+	.modedb_len		= ARRAY_SIZE(tx14d14_modes),
+	.hfmin			= 14820,
+	.hfmax			= 22230,
+	.vfmin			= 60,
+	.vfmax			= 73.3,
+	.dclkmax		= 25200000,
+};
+
+struct atmel_lcdfb_info __initdata mimc200_lcdc_data = {
+	.default_bpp		= 16,
+	.default_dmacon		= ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
+	.default_lcdcon2	= (ATMEL_LCDC_DISTYPE_TFT
+				   | ATMEL_LCDC_INVCLK
+				   | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
+				   | ATMEL_LCDC_MEMOR_BIG),
+	.default_monspecs	= &mimc200_default_monspecs,
+	.guard_time		= 2,
+};
+
+struct eth_addr {
+	u8 addr[6];
+};
+static struct eth_addr __initdata hw_addr[2];
+static struct eth_platform_data __initdata eth_data[2];
+
+static struct spi_eeprom eeprom_25lc010 = {
+		.name = "25lc010",
+		.byte_len = 128,
+		.page_size = 16,
+		.flags = EE_ADDR1,
+};
+
+static struct spi_board_info spi0_board_info[] __initdata = {
+	{
+		.modalias	= "rtc-ds1390",
+		.max_speed_hz	= 4000000,
+		.chip_select	= 2,
+	},
+	{
+		.modalias	= "at25",
+		.max_speed_hz	= 1000000,
+		.chip_select	= 1,
+		.mode		= SPI_MODE_3,
+		.platform_data	= &eeprom_25lc010,
+	},
+};
+
+static struct mci_platform_data __initdata mci0_data = {
+	.slot[0] = {
+		.bus_width	= 4,
+		.detect_pin	= GPIO_PIN_PA(26),
+		.wp_pin		= GPIO_PIN_PA(27),
+	},
+};
+
+/*
+ * 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 setup_board(void)
+{
+	at32_map_usart(0, 0);	/* USART 0: /dev/ttyS0 (TTL --> Altera) */
+	at32_map_usart(1, 1);	/* USART 1: /dev/ttyS1 (RS232) */
+	at32_map_usart(2, 2);	/* USART 2: /dev/ttyS2 (RS485) */
+	at32_map_usart(3, 3);	/* USART 3: /dev/ttyS3 (RS422 Multidrop) */
+}
+
+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,	/* close to 100 kHz */
+};
+
+static struct platform_device i2c_gpio_device = {
+	.name		= "i2c-gpio",
+	.id		= 0,
+	.dev		= {
+	.platform_data	= &i2c_gpio_data,
+	},
+};
+
+static struct i2c_board_info __initdata i2c_info[] = {
+};
+
+static int __init mimc200_init(void)
+{
+	/*
+	 * MIMC200 uses 16-bit SDRAM interface, so we don't need to
+	 * reserve any pins for it.
+	 */
+
+	at32_add_system_devices();
+
+	at32_add_device_usart(0);
+	at32_add_device_usart(1);
+	at32_add_device_usart(2);
+	at32_add_device_usart(3);
+
+	set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
+	set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
+
+	at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
+	at32_add_device_mci(0, &mci0_data);
+	at32_add_device_usba(0, NULL);
+
+	at32_select_periph(GPIO_PIOB_BASE, 1 << 28, 0, AT32_GPIOF_PULLUP);
+	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);
+	i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
+
+	at32_add_device_lcdc(0, &mimc200_lcdc_data,
+			     fbmem_start, fbmem_size, 1);
+
+	return 0;
+}
+postcore_initcall(mimc200_init);