/*
* Board-specific setup code for the ATNGW100 Network Gateway
*
* Copyright (C) 2005-2006 Atmel Corporation
*
* 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/clk.h>
#include <linux/etherdevice.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/i2c.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 <asm/atmel-mci.h>
#include <asm/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] = 20000000, /* 20 MHz on osc0 */
[2] = 12000000, /* 12 MHz on osc1 */
};
/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;
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_board_info spi0_board_info[] __initdata = {
{
.modalias = "mtd_dataflash",
.max_speed_hz = 8000000,
.chip_select = 0,
},
};
static struct mci_platform_data __initdata mci0_data = {
.slot[0] = {
.bus_width = 4,
.detect_pin = GPIO_PIN_PC(25),
.wp_pin = GPIO_PIN_PE(0),
},
};
/*
* 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(1, 0); /* USART 1: /dev/ttyS0, DB9 */
at32_setup_serial_console(0);
}
static const struct gpio_led ngw_leds[] = {
{ .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
.default_trigger = "heartbeat",
},
{ .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
{ .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
};
static const struct gpio_led_platform_data ngw_led_data = {
.num_leds = ARRAY_SIZE(ngw_leds),
.leds = (void *) ngw_leds,
};
static struct platform_device ngw_gpio_leds = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = (void *) &ngw_led_data,
}
};
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[] = {
/* NOTE: original ATtiny24 firmware is at address 0x0b */
};
static int __init atngw100_init(void)
{
unsigned i;
/*
* ATNGW100 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);
set_hw_addr(at32_add_device_eth(0, ð_data[0]));
set_hw_addr(at32_add_device_eth(1, ð_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);
for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
at32_select_gpio(ngw_leds[i].gpio,
AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
}
platform_device_register(&ngw_gpio_leds);
/* all these i2c/smbus pins should have external pullups for
* open-drain sharing among all I2C devices. SDA and SCL do;
* PB28/EXTINT3 doesn't; it should be SMBALERT# (for PMBus),
* but it's not available off-board.
*/
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));
return 0;
}
postcore_initcall(atngw100_init);
static int __init atngw100_arch_init(void)
{
/* PB30 is the otherwise unused jumper on the mainboard, with an
* external pullup; the jumper grounds it. Use it however you
* like, including letting U-Boot or Linux tweak boot sequences.
*/
at32_select_gpio(GPIO_PIN_PB(30), 0);
gpio_request(GPIO_PIN_PB(30), "j15");
gpio_direction_input(GPIO_PIN_PB(30));
gpio_export(GPIO_PIN_PB(30), false);
/* set_irq_type() after the arch_initcall for EIC has run, and
* before the I2C subsystem could try using this IRQ.
*/
return set_irq_type(AT32_EXTINT(3), IRQ_TYPE_EDGE_FALLING);
}
arch_initcall(atngw100_arch_init);
