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1 | /* |
2 | * linux/arch/unicore32/kernel/gpio.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 | /* in FPGA, no GPIO support */ | |
14 | ||
15 | #include <linux/init.h> | |
16 | #include <linux/module.h> | |
fd19f534 LW |
17 | #include <linux/gpio/driver.h> |
18 | /* FIXME: needed for gpio_set_value() - convert to use descriptors or hogs */ | |
752bcb4d G |
19 | #include <linux/gpio.h> |
20 | #include <mach/hardware.h> | |
21 | ||
22 | #ifdef CONFIG_LEDS | |
23 | #include <linux/leds.h> | |
24 | #include <linux/platform_device.h> | |
25 | ||
26 | static const struct gpio_led puv3_gpio_leds[] = { | |
27 | { .name = "cpuhealth", .gpio = GPO_CPU_HEALTH, .active_low = 0, | |
28 | .default_trigger = "heartbeat", }, | |
29 | { .name = "hdd_led", .gpio = GPO_HDD_LED, .active_low = 1, | |
fed758f6 | 30 | .default_trigger = "disk-activity", }, |
752bcb4d G |
31 | }; |
32 | ||
33 | static const struct gpio_led_platform_data puv3_gpio_led_data = { | |
34 | .num_leds = ARRAY_SIZE(puv3_gpio_leds), | |
35 | .leds = (void *) puv3_gpio_leds, | |
36 | }; | |
37 | ||
38 | static struct platform_device puv3_gpio_gpio_leds = { | |
39 | .name = "leds-gpio", | |
40 | .id = -1, | |
41 | .dev = { | |
42 | .platform_data = (void *) &puv3_gpio_led_data, | |
43 | } | |
44 | }; | |
45 | ||
46 | static int __init puv3_gpio_leds_init(void) | |
47 | { | |
48 | platform_device_register(&puv3_gpio_gpio_leds); | |
49 | return 0; | |
50 | } | |
51 | ||
52 | device_initcall(puv3_gpio_leds_init); | |
53 | #endif | |
54 | ||
55 | static int puv3_gpio_get(struct gpio_chip *chip, unsigned offset) | |
56 | { | |
a80bb4c9 | 57 | return !!(readl(GPIO_GPLR) & GPIO_GPIO(offset)); |
752bcb4d G |
58 | } |
59 | ||
60 | static void puv3_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
61 | { | |
62 | if (value) | |
e5abf78b | 63 | writel(GPIO_GPIO(offset), GPIO_GPSR); |
752bcb4d | 64 | else |
e5abf78b | 65 | writel(GPIO_GPIO(offset), GPIO_GPCR); |
752bcb4d G |
66 | } |
67 | ||
68 | static int puv3_direction_input(struct gpio_chip *chip, unsigned offset) | |
69 | { | |
70 | unsigned long flags; | |
71 | ||
72 | local_irq_save(flags); | |
e5abf78b | 73 | writel(readl(GPIO_GPDR) & ~GPIO_GPIO(offset), GPIO_GPDR); |
752bcb4d G |
74 | local_irq_restore(flags); |
75 | return 0; | |
76 | } | |
77 | ||
78 | static int puv3_direction_output(struct gpio_chip *chip, unsigned offset, | |
79 | int value) | |
80 | { | |
81 | unsigned long flags; | |
82 | ||
83 | local_irq_save(flags); | |
84 | puv3_gpio_set(chip, offset, value); | |
e5abf78b | 85 | writel(readl(GPIO_GPDR) | GPIO_GPIO(offset), GPIO_GPDR); |
752bcb4d G |
86 | local_irq_restore(flags); |
87 | return 0; | |
88 | } | |
89 | ||
90 | static struct gpio_chip puv3_gpio_chip = { | |
91 | .label = "gpio", | |
92 | .direction_input = puv3_direction_input, | |
93 | .direction_output = puv3_direction_output, | |
94 | .set = puv3_gpio_set, | |
95 | .get = puv3_gpio_get, | |
96 | .base = 0, | |
97 | .ngpio = GPIO_MAX + 1, | |
98 | }; | |
99 | ||
100 | void __init puv3_init_gpio(void) | |
101 | { | |
e5abf78b | 102 | writel(GPIO_DIR, GPIO_GPDR); |
752bcb4d G |
103 | #if defined(CONFIG_PUV3_NB0916) || defined(CONFIG_PUV3_SMW0919) \ |
104 | || defined(CONFIG_PUV3_DB0913) | |
105 | gpio_set_value(GPO_WIFI_EN, 1); | |
106 | gpio_set_value(GPO_HDD_LED, 1); | |
107 | gpio_set_value(GPO_VGA_EN, 1); | |
108 | gpio_set_value(GPO_LCD_EN, 1); | |
109 | gpio_set_value(GPO_CAM_PWR_EN, 0); | |
110 | gpio_set_value(GPO_LCD_VCC_EN, 1); | |
111 | gpio_set_value(GPO_SOFT_OFF, 1); | |
112 | gpio_set_value(GPO_BT_EN, 1); | |
113 | gpio_set_value(GPO_FAN_ON, 0); | |
114 | gpio_set_value(GPO_SPKR, 0); | |
115 | gpio_set_value(GPO_CPU_HEALTH, 1); | |
116 | gpio_set_value(GPO_LAN_SEL, 1); | |
117 | /* | |
118 | * DO NOT modify the GPO_SET_V1 and GPO_SET_V2 in kernel | |
119 | * gpio_set_value(GPO_SET_V1, 1); | |
120 | * gpio_set_value(GPO_SET_V2, 1); | |
121 | */ | |
122 | #endif | |
fd19f534 | 123 | gpiochip_add_data(&puv3_gpio_chip, NULL); |
752bcb4d | 124 | } |