2 * Board-specific setup code for the ATNGW100 Network Gateway
4 * Copyright (C) 2005-2006 Atmel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <linux/clk.h>
11 #include <linux/etherdevice.h>
12 #include <linux/irq.h>
13 #include <linux/i2c.h>
14 #include <linux/i2c-gpio.h>
15 #include <linux/init.h>
16 #include <linux/linkage.h>
17 #include <linux/platform_device.h>
18 #include <linux/types.h>
19 #include <linux/leds.h>
20 #include <linux/spi/spi.h>
23 #include <asm/setup.h>
25 #include <asm/arch/at32ap700x.h>
26 #include <asm/arch/board.h>
27 #include <asm/arch/init.h>
28 #include <asm/arch/portmux.h>
30 /* Oscillator frequencies. These are board-specific */
31 unsigned long at32_board_osc_rates[3] = {
32 [0] = 32768, /* 32.768 kHz on RTC osc */
33 [1] = 20000000, /* 20 MHz on osc0 */
34 [2] = 12000000, /* 12 MHz on osc1 */
37 /* Initialized by bootloader-specific startup code. */
38 struct tag *bootloader_tags __initdata;
43 static struct eth_addr __initdata hw_addr[2];
44 static struct eth_platform_data __initdata eth_data[2];
46 static struct spi_board_info spi0_board_info[] __initdata = {
48 .modalias = "mtd_dataflash",
49 .max_speed_hz = 10000000,
55 * The next two functions should go away as the boot loader is
56 * supposed to initialize the macb address registers with a valid
57 * ethernet address. But we need to keep it around for a while until
58 * we can be reasonably sure the boot loader does this.
60 * The phy_id is ignored as the driver will probe for it.
62 static int __init parse_tag_ethernet(struct tag *tag)
66 i = tag->u.ethernet.mac_index;
67 if (i < ARRAY_SIZE(hw_addr))
68 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
69 sizeof(hw_addr[i].addr));
73 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
75 static void __init set_hw_addr(struct platform_device *pdev)
77 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
84 if (pdev->id >= ARRAY_SIZE(hw_addr))
87 addr = hw_addr[pdev->id].addr;
88 if (!is_valid_ether_addr(addr))
92 * Since this is board-specific code, we'll cheat and use the
93 * physical address directly as we happen to know that it's
94 * the same as the virtual address.
96 regs = (void __iomem __force *)res->start;
97 pclk = clk_get(&pdev->dev, "pclk");
102 __raw_writel((addr[3] << 24) | (addr[2] << 16)
103 | (addr[1] << 8) | addr[0], regs + 0x98);
104 __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
109 void __init setup_board(void)
111 at32_map_usart(1, 0); /* USART 1: /dev/ttyS0, DB9 */
112 at32_setup_serial_console(0);
115 static const struct gpio_led ngw_leds[] = {
116 { .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
117 .default_trigger = "heartbeat",
119 { .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
120 { .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
123 static const struct gpio_led_platform_data ngw_led_data = {
124 .num_leds = ARRAY_SIZE(ngw_leds),
125 .leds = (void *) ngw_leds,
128 static struct platform_device ngw_gpio_leds = {
132 .platform_data = (void *) &ngw_led_data,
136 static struct i2c_gpio_platform_data i2c_gpio_data = {
137 .sda_pin = GPIO_PIN_PA(6),
138 .scl_pin = GPIO_PIN_PA(7),
139 .sda_is_open_drain = 1,
140 .scl_is_open_drain = 1,
141 .udelay = 2, /* close to 100 kHz */
144 static struct platform_device i2c_gpio_device = {
148 .platform_data = &i2c_gpio_data,
152 static struct i2c_board_info __initdata i2c_info[] = {
153 /* NOTE: original ATtiny24 firmware is at address 0x0b */
156 static int __init atngw100_init(void)
161 * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
162 * reserve any pins for it.
165 at32_add_system_devices();
167 at32_add_device_usart(0);
169 set_hw_addr(at32_add_device_eth(0, ð_data[0]));
170 set_hw_addr(at32_add_device_eth(1, ð_data[1]));
172 at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
173 at32_add_device_usba(0, NULL);
175 for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
176 at32_select_gpio(ngw_leds[i].gpio,
177 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
179 platform_device_register(&ngw_gpio_leds);
181 /* all these i2c/smbus pins should have external pullups for
182 * open-drain sharing among all I2C devices. SDA and SCL do;
183 * PB28/EXTINT3 doesn't; it should be SMBALERT# (for PMBus),
184 * but it's not available off-board.
186 at32_select_periph(GPIO_PIN_PB(28), 0, AT32_GPIOF_PULLUP);
187 at32_select_gpio(i2c_gpio_data.sda_pin,
188 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
189 at32_select_gpio(i2c_gpio_data.scl_pin,
190 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
191 platform_device_register(&i2c_gpio_device);
192 i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
196 postcore_initcall(atngw100_init);
198 static int __init atngw100_arch_init(void)
200 /* set_irq_type() after the arch_initcall for EIC has run, and
201 * before the I2C subsystem could try using this IRQ.
203 return set_irq_type(AT32_EXTINT(3), IRQ_TYPE_EDGE_FALLING);
205 arch_initcall(atngw100_arch_init);