1 #ifndef _IMX_GPIO_H
2
3 #include <asm/arch/imx-regs.h>
4
5 #define IMX_GPIO_ALLOC_MODE_NORMAL 0
6 #define IMX_GPIO_ALLOC_MODE_NO_ALLOC 1
7 #define IMX_GPIO_ALLOC_MODE_TRY_ALLOC 2
8 #define IMX_GPIO_ALLOC_MODE_ALLOC_ONLY 4
9 #define IMX_GPIO_ALLOC_MODE_RELEASE 8
10
11 extern int imx_gpio_request(unsigned gpio, const char *label);
12
13 extern void imx_gpio_free(unsigned gpio);
14
15 extern int imx_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
16 int alloc_mode, const char *label);
17
18 extern int imx_gpio_direction_input(unsigned gpio);
19
20 extern int imx_gpio_direction_output(unsigned gpio, int value);
21
22 extern void __imx_gpio_set_value(unsigned gpio, int value);
23
24 static inline int imx_gpio_get_value(unsigned gpio)
25 {
26 return SSR(gpio >> GPIO_PORT_SHIFT) & (1 << (gpio & GPIO_PIN_MASK));
27 }
28
29 static inline void imx_gpio_set_value_inline(unsigned gpio, int value)
30 {
31 unsigned long flags;
32
33 raw_local_irq_save(flags);
34 if(value)
35 DR(gpio >> GPIO_PORT_SHIFT) |= (1 << (gpio & GPIO_PIN_MASK));
36 else
37 DR(gpio >> GPIO_PORT_SHIFT) &= ~(1 << (gpio & GPIO_PIN_MASK));
38 raw_local_irq_restore(flags);
39 }
40
41 static inline void imx_gpio_set_value(unsigned gpio, int value)
42 {
43 if(__builtin_constant_p(gpio))
44 imx_gpio_set_value_inline(gpio, value);
45 else
46 __imx_gpio_set_value(gpio, value);
47 }
48
49 extern int imx_gpio_to_irq(unsigned gpio);
50
51 extern int imx_irq_to_gpio(unsigned irq);
52
53 /*-------------------------------------------------------------------------*/
54
55 /* Wrappers for "new style" GPIO calls. These calls i.MX specific versions
56 * to allow future extension of GPIO logic.
57 */
58
59 static inline int gpio_request(unsigned gpio, const char *label)
60 {
61 return imx_gpio_request(gpio, label);
62 }
63
64 static inline void gpio_free(unsigned gpio)
65 {
66 imx_gpio_free(gpio);
67 }
68
69 static inline int gpio_direction_input(unsigned gpio)
70 {
71 return imx_gpio_direction_input(gpio);
72 }
73
74 static inline int gpio_direction_output(unsigned gpio, int value)
75 {
76 return imx_gpio_direction_output(gpio, value);
77 }
78
79 static inline int gpio_get_value(unsigned gpio)
80 {
81 return imx_gpio_get_value(gpio);
82 }
83
84 static inline void gpio_set_value(unsigned gpio, int value)
85 {
86 imx_gpio_set_value(gpio, value);
87 }
88
89 #include <asm-generic/gpio.h> /* cansleep wrappers */
90
91 static inline int gpio_to_irq(unsigned gpio)
92 {
93 return imx_gpio_to_irq(gpio);
94 }
95
96 static inline int irq_to_gpio(unsigned irq)
97 {
98 return imx_irq_to_gpio(irq);
99 }
100
101
102 #endif
103
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