f9f451d9ca
Add GPIO leds to the NGW100 platform and its defconfig.
Access through /sys/class/leds/{a,b,sys}/* files; one
defaults to a heartbeat.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
152 lines
3.7 KiB
C
152 lines
3.7 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/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/io.h>
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#include <asm/setup.h>
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#include <asm/arch/at32ap7000.h>
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#include <asm/arch/board.h>
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#include <asm/arch/init.h>
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#include <asm/arch/portmux.h>
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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 = 10000000,
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.chip_select = 0,
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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 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_system_devices();
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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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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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return 0;
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}
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postcore_initcall(atngw100_init);
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