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fa7499ef G |
1 | /* |
2 | * linux/arch/unicore32/kernel/puv3-nb0916.c | |
3 | * | |
4 | * Code specific to PKUnity SoC and UniCore ISA | |
5 | * | |
6 | * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> | |
7 | * Copyright (C) 2001-2010 Guan Xuetao | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/init.h> | |
15 | #include <linux/device.h> | |
fa7499ef G |
16 | #include <linux/platform_device.h> |
17 | #include <linux/mtd/physmap.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/reboot.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/i2c.h> | |
b68edac9 | 22 | #include <linux/pwm.h> |
fa7499ef G |
23 | #include <linux/pwm_backlight.h> |
24 | #include <linux/gpio.h> | |
25 | #include <linux/gpio_keys.h> | |
26 | #include <linux/input.h> | |
27 | ||
28 | #include <mach/hardware.h> | |
29 | ||
30 | static struct physmap_flash_data physmap_flash_data = { | |
31 | .width = 1, | |
32 | }; | |
33 | ||
34 | static struct resource physmap_flash_resource = { | |
35 | .start = 0xFFF80000, | |
36 | .end = 0xFFFFFFFF, | |
37 | .flags = IORESOURCE_MEM, | |
38 | }; | |
39 | ||
40 | static struct resource puv3_i2c_resources[] = { | |
41 | [0] = { | |
1cf46c42 G |
42 | .start = io_v2p(PKUNITY_I2C_BASE), |
43 | .end = io_v2p(PKUNITY_I2C_BASE) + 0xff, | |
fa7499ef G |
44 | .flags = IORESOURCE_MEM, |
45 | }, | |
46 | [1] = { | |
47 | .start = IRQ_I2C, | |
48 | .end = IRQ_I2C, | |
49 | .flags = IORESOURCE_IRQ, | |
50 | } | |
51 | }; | |
52 | ||
b68edac9 TR |
53 | static struct pwm_lookup nb0916_pwm_lookup[] = { |
54 | PWM_LOOKUP("PKUnity-v3-PWM", 0, "pwm-backlight", NULL, 70 * 1024, | |
55 | PWM_POLARITY_NORMAL), | |
56 | }; | |
57 | ||
fa7499ef | 58 | static struct platform_pwm_backlight_data nb0916_backlight_data = { |
fa7499ef G |
59 | .max_brightness = 100, |
60 | .dft_brightness = 100, | |
611c86c6 | 61 | .enable_gpio = -1, |
fa7499ef G |
62 | }; |
63 | ||
64 | static struct gpio_keys_button nb0916_gpio_keys[] = { | |
65 | { | |
66 | .type = EV_KEY, | |
67 | .code = KEY_POWER, | |
68 | .gpio = GPI_SOFF_REQ, | |
69 | .desc = "Power Button", | |
70 | .wakeup = 1, | |
71 | .active_low = 1, | |
72 | }, | |
73 | { | |
74 | .type = EV_KEY, | |
75 | .code = BTN_TOUCH, | |
76 | .gpio = GPI_BTN_TOUCH, | |
77 | .desc = "Touchpad Button", | |
78 | .wakeup = 1, | |
79 | .active_low = 1, | |
80 | }, | |
81 | }; | |
82 | ||
83 | static struct gpio_keys_platform_data nb0916_gpio_button_data = { | |
84 | .buttons = nb0916_gpio_keys, | |
85 | .nbuttons = ARRAY_SIZE(nb0916_gpio_keys), | |
86 | }; | |
87 | ||
88 | static irqreturn_t nb0916_lcdcaseoff_handler(int irq, void *dev_id) | |
89 | { | |
90 | if (gpio_get_value(GPI_LCD_CASE_OFF)) | |
91 | gpio_set_value(GPO_LCD_EN, 1); | |
92 | else | |
93 | gpio_set_value(GPO_LCD_EN, 0); | |
94 | ||
95 | return IRQ_HANDLED; | |
96 | } | |
97 | ||
98 | static irqreturn_t nb0916_overheat_handler(int irq, void *dev_id) | |
99 | { | |
100 | machine_halt(); | |
101 | /* SYSTEM HALT, NO RETURN */ | |
102 | return IRQ_HANDLED; | |
103 | } | |
104 | ||
105 | static struct i2c_board_info __initdata puv3_i2c_devices[] = { | |
106 | { I2C_BOARD_INFO("lm75", I2C_TAR_THERMAL), }, | |
107 | { I2C_BOARD_INFO("bq27200", I2C_TAR_PWIC), }, | |
108 | { I2C_BOARD_INFO("24c02", I2C_TAR_EEPROM), }, | |
109 | }; | |
110 | ||
111 | int __init mach_nb0916_init(void) | |
112 | { | |
113 | i2c_register_board_info(0, puv3_i2c_devices, | |
114 | ARRAY_SIZE(puv3_i2c_devices)); | |
115 | ||
116 | platform_device_register_simple("PKUnity-v3-I2C", -1, | |
117 | puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources)); | |
118 | ||
b68edac9 TR |
119 | pwm_add_table(nb0916_pwm_lookup, ARRAY_SIZE(nb0916_pwm_lookup)); |
120 | ||
d2168146 | 121 | platform_device_register_data(NULL, "pwm-backlight", -1, |
fa7499ef G |
122 | &nb0916_backlight_data, sizeof(nb0916_backlight_data)); |
123 | ||
d2168146 | 124 | platform_device_register_data(NULL, "gpio-keys", -1, |
fa7499ef G |
125 | &nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data)); |
126 | ||
d2168146 | 127 | platform_device_register_resndata(NULL, "physmap-flash", -1, |
fa7499ef G |
128 | &physmap_flash_resource, 1, |
129 | &physmap_flash_data, sizeof(physmap_flash_data)); | |
130 | ||
131 | if (request_irq(gpio_to_irq(GPI_LCD_CASE_OFF), | |
132 | &nb0916_lcdcaseoff_handler, | |
86abc23e | 133 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, |
fa7499ef G |
134 | "NB0916 lcd case off", NULL) < 0) { |
135 | ||
136 | printk(KERN_DEBUG "LCD-Case-OFF IRQ %d not available\n", | |
137 | gpio_to_irq(GPI_LCD_CASE_OFF)); | |
138 | } | |
139 | ||
140 | if (request_irq(gpio_to_irq(GPI_OTP_INT), &nb0916_overheat_handler, | |
86abc23e | 141 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, |
fa7499ef G |
142 | "NB0916 overheating protection", NULL) < 0) { |
143 | ||
144 | printk(KERN_DEBUG "Overheating Protection IRQ %d not available\n", | |
145 | gpio_to_irq(GPI_OTP_INT)); | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | subsys_initcall_sync(mach_nb0916_init); |