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/gpio.h>
13 #include <linux/irq.h>
14 #include <linux/i2c.h>
15 #include <linux/i2c-gpio.h>
16 #include <linux/init.h>
17 #include <linux/linkage.h>
18 #include <linux/platform_device.h>
19 #include <linux/types.h>
20 #include <linux/leds.h>
21 #include <linux/spi/spi.h>
23 #include <asm/atmel-mci.h>
25 #include <asm/setup.h>
27 #include <mach/at32ap700x.h>
28 #include <mach/board.h>
29 #include <mach/init.h>
30 #include <mach/portmux.h>
32 /* Oscillator frequencies. These are board-specific */
33 unsigned long at32_board_osc_rates[3] = {
34 [0] = 32768, /* 32.768 kHz on RTC osc */
35 [1] = 20000000, /* 20 MHz on osc0 */
36 [2] = 12000000, /* 12 MHz on osc1 */
39 /* Initialized by bootloader-specific startup code. */
40 struct tag *bootloader_tags __initdata;
45 static struct eth_addr __initdata hw_addr[2];
46 static struct eth_platform_data __initdata eth_data[2];
48 static struct spi_board_info spi0_board_info[] __initdata = {
50 .modalias = "mtd_dataflash",
51 .max_speed_hz = 8000000,
56 static struct mci_platform_data __initdata mci0_data = {
59 .detect_pin = GPIO_PIN_PC(25),
60 .wp_pin = GPIO_PIN_PE(0),
65 * The next two functions should go away as the boot loader is
66 * supposed to initialize the macb address registers with a valid
67 * ethernet address. But we need to keep it around for a while until
68 * we can be reasonably sure the boot loader does this.
70 * The phy_id is ignored as the driver will probe for it.
72 static int __init parse_tag_ethernet(struct tag *tag)
76 i = tag->u.ethernet.mac_index;
77 if (i < ARRAY_SIZE(hw_addr))
78 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
79 sizeof(hw_addr[i].addr));
83 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
85 static void __init set_hw_addr(struct platform_device *pdev)
87 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
94 if (pdev->id >= ARRAY_SIZE(hw_addr))
97 addr = hw_addr[pdev->id].addr;
98 if (!is_valid_ether_addr(addr))
102 * Since this is board-specific code, we'll cheat and use the
103 * physical address directly as we happen to know that it's
104 * the same as the virtual address.
106 regs = (void __iomem __force *)res->start;
107 pclk = clk_get(&pdev->dev, "pclk");
112 __raw_writel((addr[3] << 24) | (addr[2] << 16)
113 | (addr[1] << 8) | addr[0], regs + 0x98);
114 __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
119 void __init setup_board(void)
121 at32_map_usart(1, 0); /* USART 1: /dev/ttyS0, DB9 */
122 at32_setup_serial_console(0);
125 static const struct gpio_led ngw_leds[] = {
126 { .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
127 .default_trigger = "heartbeat",
129 { .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
130 { .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
133 static const struct gpio_led_platform_data ngw_led_data = {
134 .num_leds = ARRAY_SIZE(ngw_leds),
135 .leds = (void *) ngw_leds,
138 static struct platform_device ngw_gpio_leds = {
142 .platform_data = (void *) &ngw_led_data,
146 static struct i2c_gpio_platform_data i2c_gpio_data = {
147 .sda_pin = GPIO_PIN_PA(6),
148 .scl_pin = GPIO_PIN_PA(7),
149 .sda_is_open_drain = 1,
150 .scl_is_open_drain = 1,
151 .udelay = 2, /* close to 100 kHz */
154 static struct platform_device i2c_gpio_device = {
158 .platform_data = &i2c_gpio_data,
162 static struct i2c_board_info __initdata i2c_info[] = {
163 /* NOTE: original ATtiny24 firmware is at address 0x0b */
166 static int __init atngw100_init(void)
171 * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
172 * reserve any pins for it.
175 at32_add_system_devices();
177 at32_add_device_usart(0);
179 set_hw_addr(at32_add_device_eth(0, ð_data[0]));
180 set_hw_addr(at32_add_device_eth(1, ð_data[1]));
182 at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
183 at32_add_device_mci(0, &mci0_data);
184 at32_add_device_usba(0, NULL);
186 for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
187 at32_select_gpio(ngw_leds[i].gpio,
188 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
190 platform_device_register(&ngw_gpio_leds);
192 /* all these i2c/smbus pins should have external pullups for
193 * open-drain sharing among all I2C devices. SDA and SCL do;
194 * PB28/EXTINT3 doesn't; it should be SMBALERT# (for PMBus),
195 * but it's not available off-board.
197 at32_select_periph(GPIO_PIOB_BASE, 1 << 28, 0, AT32_GPIOF_PULLUP);
198 at32_select_gpio(i2c_gpio_data.sda_pin,
199 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
200 at32_select_gpio(i2c_gpio_data.scl_pin,
201 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
202 platform_device_register(&i2c_gpio_device);
203 i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
207 postcore_initcall(atngw100_init);
209 static int __init atngw100_arch_init(void)
211 /* PB30 is the otherwise unused jumper on the mainboard, with an
212 * external pullup; the jumper grounds it. Use it however you
213 * like, including letting U-Boot or Linux tweak boot sequences.
215 at32_select_gpio(GPIO_PIN_PB(30), 0);
216 gpio_request(GPIO_PIN_PB(30), "j15");
217 gpio_direction_input(GPIO_PIN_PB(30));
218 gpio_export(GPIO_PIN_PB(30), false);
220 /* set_irq_type() after the arch_initcall for EIC has run, and
221 * before the I2C subsystem could try using this IRQ.
223 return set_irq_type(AT32_EXTINT(3), IRQ_TYPE_EDGE_FALLING);
225 arch_initcall(atngw100_arch_init);