228 lines
6 KiB
C
228 lines
6 KiB
C
/*
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* Board-specific setup code for the ATNGW100 Network Gateway
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*
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* Copyright (C) 2005-2006 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/etherdevice.h>
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#include <linux/gpio.h>
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#include <linux/irq.h>
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#include <linux/i2c.h>
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#include <linux/i2c-gpio.h>
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#include <linux/init.h>
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#include <linux/linkage.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <linux/leds.h>
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#include <linux/spi/spi.h>
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#include <asm/atmel-mci.h>
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#include <asm/io.h>
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#include <asm/setup.h>
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#include <mach/at32ap700x.h>
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#include <mach/board.h>
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#include <mach/init.h>
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#include <mach/portmux.h>
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/* Oscillator frequencies. These are board-specific */
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unsigned long at32_board_osc_rates[3] = {
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[0] = 32768, /* 32.768 kHz on RTC osc */
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[1] = 20000000, /* 20 MHz on osc0 */
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[2] = 12000000, /* 12 MHz on osc1 */
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};
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/* Initialized by bootloader-specific startup code. */
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struct tag *bootloader_tags __initdata;
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struct eth_addr {
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u8 addr[6];
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};
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static struct eth_addr __initdata hw_addr[2];
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static struct eth_platform_data __initdata eth_data[2];
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static struct spi_board_info spi0_board_info[] __initdata = {
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{
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.modalias = "mtd_dataflash",
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.max_speed_hz = 8000000,
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.chip_select = 0,
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},
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};
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static struct mci_platform_data __initdata mci0_data = {
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.slot[0] = {
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.bus_width = 4,
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#ifndef CONFIG_BOARD_ATNGW100_EVKLCD10X
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.detect_pin = GPIO_PIN_PC(25),
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.wp_pin = GPIO_PIN_PE(0),
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#else
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.detect_pin = GPIO_PIN_NONE,
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.wp_pin = GPIO_PIN_NONE,
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#endif
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},
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};
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/*
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* The next two functions should go away as the boot loader is
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* supposed to initialize the macb address registers with a valid
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* ethernet address. But we need to keep it around for a while until
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* we can be reasonably sure the boot loader does this.
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*
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* The phy_id is ignored as the driver will probe for it.
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*/
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static int __init parse_tag_ethernet(struct tag *tag)
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{
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int i;
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i = tag->u.ethernet.mac_index;
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if (i < ARRAY_SIZE(hw_addr))
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memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
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sizeof(hw_addr[i].addr));
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return 0;
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}
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__tagtable(ATAG_ETHERNET, parse_tag_ethernet);
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static void __init set_hw_addr(struct platform_device *pdev)
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{
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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const u8 *addr;
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void __iomem *regs;
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struct clk *pclk;
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if (!res)
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return;
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if (pdev->id >= ARRAY_SIZE(hw_addr))
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return;
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addr = hw_addr[pdev->id].addr;
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if (!is_valid_ether_addr(addr))
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return;
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/*
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* Since this is board-specific code, we'll cheat and use the
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* physical address directly as we happen to know that it's
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* the same as the virtual address.
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*/
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regs = (void __iomem __force *)res->start;
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pclk = clk_get(&pdev->dev, "pclk");
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if (!pclk)
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return;
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clk_enable(pclk);
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__raw_writel((addr[3] << 24) | (addr[2] << 16)
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| (addr[1] << 8) | addr[0], regs + 0x98);
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__raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
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clk_disable(pclk);
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clk_put(pclk);
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}
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void __init setup_board(void)
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{
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at32_map_usart(1, 0); /* USART 1: /dev/ttyS0, DB9 */
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at32_setup_serial_console(0);
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}
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static const struct gpio_led ngw_leds[] = {
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{ .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
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.default_trigger = "heartbeat",
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},
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{ .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
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{ .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
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};
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static const struct gpio_led_platform_data ngw_led_data = {
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.num_leds = ARRAY_SIZE(ngw_leds),
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.leds = (void *) ngw_leds,
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};
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static struct platform_device ngw_gpio_leds = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = (void *) &ngw_led_data,
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}
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};
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static struct i2c_gpio_platform_data i2c_gpio_data = {
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.sda_pin = GPIO_PIN_PA(6),
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.scl_pin = GPIO_PIN_PA(7),
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.sda_is_open_drain = 1,
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.scl_is_open_drain = 1,
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.udelay = 2, /* close to 100 kHz */
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};
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static struct platform_device i2c_gpio_device = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = {
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.platform_data = &i2c_gpio_data,
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},
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};
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static struct i2c_board_info __initdata i2c_info[] = {
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/* NOTE: original ATtiny24 firmware is at address 0x0b */
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};
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static int __init atngw100_init(void)
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{
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unsigned i;
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/*
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* ATNGW100 uses 16-bit SDRAM interface, so we don't need to
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* reserve any pins for it.
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*/
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at32_add_device_usart(0);
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set_hw_addr(at32_add_device_eth(0, ð_data[0]));
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set_hw_addr(at32_add_device_eth(1, ð_data[1]));
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at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
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at32_add_device_mci(0, &mci0_data);
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at32_add_device_usba(0, NULL);
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for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
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at32_select_gpio(ngw_leds[i].gpio,
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AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
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}
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platform_device_register(&ngw_gpio_leds);
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/* all these i2c/smbus pins should have external pullups for
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* open-drain sharing among all I2C devices. SDA and SCL do;
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* PB28/EXTINT3 doesn't; it should be SMBALERT# (for PMBus),
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* but it's not available off-board.
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*/
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at32_select_periph(GPIO_PIOB_BASE, 1 << 28, 0, AT32_GPIOF_PULLUP);
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at32_select_gpio(i2c_gpio_data.sda_pin,
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AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
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at32_select_gpio(i2c_gpio_data.scl_pin,
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AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
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platform_device_register(&i2c_gpio_device);
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i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
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return 0;
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}
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postcore_initcall(atngw100_init);
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static int __init atngw100_arch_init(void)
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{
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/* PB30 is the otherwise unused jumper on the mainboard, with an
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* external pullup; the jumper grounds it. Use it however you
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* like, including letting U-Boot or Linux tweak boot sequences.
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*/
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at32_select_gpio(GPIO_PIN_PB(30), 0);
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gpio_request(GPIO_PIN_PB(30), "j15");
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gpio_direction_input(GPIO_PIN_PB(30));
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gpio_export(GPIO_PIN_PB(30), false);
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/* set_irq_type() after the arch_initcall for EIC has run, and
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* before the I2C subsystem could try using this IRQ.
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*/
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return set_irq_type(AT32_EXTINT(3), IRQ_TYPE_EDGE_FALLING);
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}
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arch_initcall(atngw100_arch_init);
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