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openwrt-xburst/target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n526.c

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/*
* Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
* N526 eBook reader support
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <asm/mach-jz4740/platform.h>
#include <linux/mtd/jz4740_nand.h>
#include <linux/jz4740_fb.h>
#include <linux/power_supply.h>
#include <linux/mmc/jz4740_mmc.h>
#include <video/broadsheetfb.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include "clock.h"
/* NAND */
static struct nand_ecclayout n526_ecclayout = {
.eccbytes = 36,
.eccpos = {
6, 7, 8, 9, 10, 11, 12, 13,
14, 15, 16, 17, 18, 19, 20, 21,
22, 23, 24, 25, 26, 27, 28, 29,
30, 31, 32, 33, 34, 35, 36, 37,
38, 39, 40, 41},
.oobfree = {
{.offset = 2,
.length = 4},
{.offset = 42,
.length = 22}}
};
static struct mtd_partition n526_partitions[] = {
{ .name = "NAND BOOT partition",
.offset = 0 * 0x100000,
.size = 4 * 0x100000,
},
{ .name = "NAND KERNEL partition",
.offset = 4 * 0x100000,
.size = 4 * 0x100000,
},
{ .name = "NAND ROOTFS partition",
.offset = 16 * 0x100000,
.size = 498 * 0x100000,
},
};
static struct jz_nand_platform_data n526_nand_pdata = {
.ecc_layout = &n526_ecclayout,
.partitions = n526_partitions,
.num_partitions = ARRAY_SIZE(n526_partitions),
.busy_gpio = 94,
};
static struct jz4740_mmc_platform_data n526_mmc_pdata = {
.gpio_card_detect = JZ_GPIO_PORTD(7),
.card_detect_active_low = 1,
.gpio_read_only = -1,
.gpio_power = JZ_GPIO_PORTD(17),
.power_active_low = 1,
};
static struct gpio_led n526_leds[] = {
{
.name = "n526:blue:power",
.gpio = JZ_GPIO_PORTD(28),
.default_state = LEDS_GPIO_DEFSTATE_ON,
}
};
static struct gpio_led_platform_data n526_leds_pdata = {
.leds = n526_leds,
.num_leds = ARRAY_SIZE(n526_leds),
};
static struct platform_device n526_leds_device = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = &n526_leds_pdata,
},
};
static void __init board_gpio_setup(void)
{
/* We only need to enable/disable pullup here for pins used in generic
* drivers. Everything else is done by the drivers themselfs. */
jz_gpio_disable_pullup(JZ_GPIO_PORTD(17));
jz_gpio_enable_pullup(JZ_GPIO_PORTD(7));
jz_gpio_disable_pullup(JZ_GPIO_PORTC(19));
jz_gpio_disable_pullup(JZ_GPIO_PORTC(20));
jz_gpio_disable_pullup(JZ_GPIO_PORTC(21));
jz_gpio_disable_pullup(JZ_GPIO_PORTC(23));
}
static const int n526_eink_ctrl_gpios[] = {
0,
JZ_GPIO_PORTC(23),
JZ_GPIO_PORTC(19),
JZ_GPIO_PORTC(20),
};
static void n526_eink_set_ctl(struct broadsheetfb_par * par, unsigned char ctrl, u8
value)
{
gpio_set_value(n526_eink_ctrl_gpios[ctrl], value);
}
static int n526_eink_wait(struct broadsheetfb_par *par)
{
wait_event(par->waitq, gpio_get_value(JZ_GPIO_PORTB(17)));
return 0;
}
static u16 n526_eink_get_hdb(struct broadsheetfb_par *par)
{
u16 value = 0;
jz_gpio_port_direction_input(JZ_GPIO_PORTC(0), 0xffff);
gpio_set_value(JZ_GPIO_PORTC(21), 0);
mdelay(100);
value = jz_gpio_port_get_value(JZ_GPIO_PORTC(0), 0xffff);
gpio_set_value(JZ_GPIO_PORTC(21), 1);
jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
return value;
}
static void n526_eink_set_hdb(struct broadsheetfb_par *par, u16 value)
{
jz_gpio_port_set_value(JZ_GPIO_PORTC(0), value, 0xffff);
}
static int n526_eink_init(struct broadsheetfb_par *par)
{
int i;
gpio_request(JZ_GPIO_PORTD(1), "display reset");
gpio_direction_output(JZ_GPIO_PORTD(1), 1);
mdelay(10);
gpio_set_value(JZ_GPIO_PORTD(1), 0);
gpio_request(JZ_GPIO_PORTB(18), "eink enable");
gpio_direction_output(JZ_GPIO_PORTB(18), 0);
gpio_request(JZ_GPIO_PORTB(29), "foobar");
gpio_direction_output(JZ_GPIO_PORTB(29), 1);
for(i = 1; i < ARRAY_SIZE(n526_eink_ctrl_gpios); ++i) {
gpio_request(n526_eink_ctrl_gpios[i], "eink display ctrl");
gpio_direction_output(n526_eink_ctrl_gpios[i], 0);
}
gpio_request(JZ_GPIO_PORTC(22), "foobar");
gpio_direction_input(JZ_GPIO_PORTC(22));
gpio_request(JZ_GPIO_PORTC(21), "eink nRD");
gpio_direction_output(JZ_GPIO_PORTC(21), 1);
for(i = 0; i < 16; ++i) {
gpio_request(JZ_GPIO_PORTC(i), "eink display data");
}
jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
gpio_set_value(JZ_GPIO_PORTB(18), 1);
return 0;
}
static irqreturn_t n526_eink_busy_irq(int irq, void *devid)
{
struct broadsheetfb_par *par = devid;
wake_up(&par->waitq);
return IRQ_HANDLED;
}
static int n526_eink_setup_irq(struct fb_info *info)
{
int ret;
struct broadsheetfb_par *par = info->par;
gpio_request(JZ_GPIO_PORTB(17), "eink busy");
gpio_direction_input(JZ_GPIO_PORTB(17));
ret = request_irq(gpio_to_irq(JZ_GPIO_PORTB(17)), n526_eink_busy_irq,
IRQF_DISABLED | IRQF_TRIGGER_RISING,
"eink busyline", par);
if (ret)
printk("n526 display: Failed to request busyline irq: %d\n", ret);
return 0;
}
static void n526_eink_cleanup(struct broadsheetfb_par *par)
{
}
static struct broadsheet_board broadsheet_pdata = {
.owner = THIS_MODULE,
.init = n526_eink_init,
.wait_for_rdy = n526_eink_wait,
.set_ctl = n526_eink_set_ctl,
.set_hdb = n526_eink_set_hdb,
.get_hdb = n526_eink_get_hdb,
.cleanup = n526_eink_cleanup,
.setup_irq = n526_eink_setup_irq,
};
static struct platform_device n526_broadsheet_device = {
.name = "broadsheetfb",
.id = -1,
.dev = {
.platform_data = &broadsheet_pdata,
},
};
static struct gpio_keys_button qi_lb60_gpio_keys_buttons[] = {
[0] = {
.code = KEY_ENTER,
.gpio = 0,
.active_low = 1,
.desc = "Power",
},
};
static struct gpio_keys_platform_data qi_lb60_gpio_keys_data = {
.nbuttons = ARRAY_SIZE(qi_lb60_gpio_keys_buttons),
.buttons = qi_lb60_gpio_keys_buttons,
};
static struct platform_device qi_lb60_gpio_keys = {
.name = "gpio-keys",
.id = -1,
.dev = {
.platform_data = &qi_lb60_gpio_keys_data,
}
};
static struct i2c_gpio_platform_data n526_i2c_pdata = {
.sda_pin = JZ_GPIO_PORTD(23),
.scl_pin = JZ_GPIO_PORTD(24),
.udelay = 2,
.timeout = 3 * HZ,
};
static struct platform_device n526_i2c_device = {
.name = "i2c-gpio",
.id = -1,
.dev = {
.platform_data = &n526_i2c_pdata,
},
};
static struct i2c_board_info n526_i2c_board_info = {
.type = "n526-lpc",
.addr = 0x54,
};
static struct platform_device *jz_platform_devices[] __initdata = {
&jz4740_usb_ohci_device,
&jz4740_usb_gdt_device,
&jz4740_mmc_device,
&jz4740_nand_device,
&jz4740_i2s_device,
&jz4740_codec_device,
&jz4740_rtc_device,
&n526_leds_device,
&n526_broadsheet_device,
&qi_lb60_gpio_keys,
&n526_i2c_device,
};
static int __init n526_init_platform_devices(void)
{
jz4740_nand_device.dev.platform_data = &n526_nand_pdata;
jz4740_mmc_device.dev.platform_data = &n526_mmc_pdata;
n526_i2c_board_info.irq = gpio_to_irq(JZ_GPIO_PORTD(14)),
i2c_register_board_info(0, &n526_i2c_board_info, 1);
return platform_add_devices(jz_platform_devices,
ARRAY_SIZE(jz_platform_devices));
}
struct jz4740_clock_board_data jz4740_clock_bdata = {
.ext_rate = 12000000,
.rtc_rate = 32768,
};
extern int jz_gpiolib_init(void);
static int __init n526_board_setup(void)
{
if (jz_gpiolib_init())
panic("Failed to initalize jz gpio\n");
jz4740_clock_init();
board_gpio_setup();
if (n526_init_platform_devices())
panic("Failed to initalize platform devices\n");
return 0;
}
arch_initcall(n526_board_setup);