summaryrefslogtreecommitdiffstats
path: root/arch/unicore32/kernel/puv3-nb0916.c
blob: 37b12a06b499ec0f1c4220aab59fe1473a0026d2 (plain)
1
2
3
4
5
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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * linux/arch/unicore32/kernel/puv3-nb0916.c
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 *	Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
 *	Copyright (C) 2001-2010 Guan Xuetao
 *
 * 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/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/mtd/physmap.h>
#include <linux/io.h>
#include <linux/reboot.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/pwm_backlight.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>

#include <mach/hardware.h>

static struct physmap_flash_data physmap_flash_data = {
	.width		= 1,
};

static struct resource physmap_flash_resource = {
	.start		= 0xFFF80000,
	.end		= 0xFFFFFFFF,
	.flags		= IORESOURCE_MEM,
};

static struct resource puv3_i2c_resources[] = {
	[0] = {
		.start = io_v2p(PKUNITY_I2C_BASE),
		.end   = io_v2p(PKUNITY_I2C_BASE) + 0xff,
		.flags = IORESOURCE_MEM,
	},
	[1] = {
		.start = IRQ_I2C,
		.end   = IRQ_I2C,
		.flags = IORESOURCE_IRQ,
	}
};

static struct platform_pwm_backlight_data nb0916_backlight_data = {
	.pwm_id		= 0,
	.max_brightness	= 100,
	.dft_brightness	= 100,
	.pwm_period_ns	= 70 * 1024,
};

static struct gpio_keys_button nb0916_gpio_keys[] = {
	{
		.type	= EV_KEY,
		.code	= KEY_POWER,
		.gpio	= GPI_SOFF_REQ,
		.desc	= "Power Button",
		.wakeup = 1,
		.active_low = 1,
	},
	{
		.type	= EV_KEY,
		.code	= BTN_TOUCH,
		.gpio	= GPI_BTN_TOUCH,
		.desc	= "Touchpad Button",
		.wakeup = 1,
		.active_low = 1,
	},
};

static struct gpio_keys_platform_data nb0916_gpio_button_data = {
	.buttons	= nb0916_gpio_keys,
	.nbuttons	= ARRAY_SIZE(nb0916_gpio_keys),
};

static irqreturn_t nb0916_lcdcaseoff_handler(int irq, void *dev_id)
{
	if (gpio_get_value(GPI_LCD_CASE_OFF))
		gpio_set_value(GPO_LCD_EN, 1);
	else
		gpio_set_value(GPO_LCD_EN, 0);

	return IRQ_HANDLED;
}

static irqreturn_t nb0916_overheat_handler(int irq, void *dev_id)
{
	machine_halt();
	/* SYSTEM HALT, NO RETURN */
	return IRQ_HANDLED;
}

static struct i2c_board_info __initdata puv3_i2c_devices[] = {
	{	I2C_BOARD_INFO("lm75",		I2C_TAR_THERMAL),	},
	{	I2C_BOARD_INFO("bq27200",	I2C_TAR_PWIC),		},
	{	I2C_BOARD_INFO("24c02",		I2C_TAR_EEPROM),	},
};

int __init mach_nb0916_init(void)
{
	i2c_register_board_info(0, puv3_i2c_devices,
			ARRAY_SIZE(puv3_i2c_devices));

	platform_device_register_simple("PKUnity-v3-I2C", -1,
			puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources));

	platform_device_register_data(&platform_bus, "pwm-backlight", -1,
			&nb0916_backlight_data, sizeof(nb0916_backlight_data));

	platform_device_register_data(&platform_bus, "gpio-keys", -1,
			&nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data));

	platform_device_register_resndata(&platform_bus, "physmap-flash", -1,
			&physmap_flash_resource, 1,
			&physmap_flash_data, sizeof(physmap_flash_data));

	if (request_irq(gpio_to_irq(GPI_LCD_CASE_OFF),
		&nb0916_lcdcaseoff_handler,
		IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
		"NB0916 lcd case off", NULL) < 0) {

		printk(KERN_DEBUG "LCD-Case-OFF IRQ %d not available\n",
			gpio_to_irq(GPI_LCD_CASE_OFF));
	}

	if (request_irq(gpio_to_irq(GPI_OTP_INT), &nb0916_overheat_handler,
		IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
		"NB0916 overheating protection", NULL) < 0) {

		printk(KERN_DEBUG "Overheating Protection IRQ %d not available\n",
			gpio_to_irq(GPI_OTP_INT));
	}

	return 0;
}

subsys_initcall_sync(mach_nb0916_init);