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1da177e4 LT |
1 | #include <linux/spinlock.h> |
2 | ||
55b8c045 | 3 | u32 scx200_gpio_configure(unsigned index, u32 set, u32 clear); |
1da177e4 LT |
4 | |
5 | extern unsigned scx200_gpio_base; | |
6 | extern long scx200_gpio_shadow[2]; | |
58012cd7 | 7 | extern struct nsc_gpio_ops scx200_gpio_ops; |
1da177e4 LT |
8 | |
9 | #define scx200_gpio_present() (scx200_gpio_base!=0) | |
10 | ||
11 | /* Definitions to make sure I do the same thing in all functions */ | |
12 | #define __SCx200_GPIO_BANK unsigned bank = index>>5 | |
13 | #define __SCx200_GPIO_IOADDR unsigned short ioaddr = scx200_gpio_base+0x10*bank | |
14 | #define __SCx200_GPIO_SHADOW long *shadow = scx200_gpio_shadow+bank | |
15 | #define __SCx200_GPIO_INDEX index &= 31 | |
16 | ||
17 | #define __SCx200_GPIO_OUT __asm__ __volatile__("outsl":"=mS" (shadow):"d" (ioaddr), "0" (shadow)) | |
18 | ||
19 | /* returns the value of the GPIO pin */ | |
20 | ||
55b8c045 | 21 | static inline int scx200_gpio_get(unsigned index) { |
1da177e4 LT |
22 | __SCx200_GPIO_BANK; |
23 | __SCx200_GPIO_IOADDR + 0x04; | |
24 | __SCx200_GPIO_INDEX; | |
25 | ||
26 | return (inl(ioaddr) & (1<<index)) ? 1 : 0; | |
27 | } | |
28 | ||
29 | /* return the value driven on the GPIO signal (the value that will be | |
30 | driven if the GPIO is configured as an output, it might not be the | |
31 | state of the GPIO right now if the GPIO is configured as an input) */ | |
32 | ||
55b8c045 | 33 | static inline int scx200_gpio_current(unsigned index) { |
1da177e4 LT |
34 | __SCx200_GPIO_BANK; |
35 | __SCx200_GPIO_INDEX; | |
36 | ||
37 | return (scx200_gpio_shadow[bank] & (1<<index)) ? 1 : 0; | |
38 | } | |
39 | ||
40 | /* drive the GPIO signal high */ | |
41 | ||
55b8c045 | 42 | static inline void scx200_gpio_set_high(unsigned index) { |
1da177e4 LT |
43 | __SCx200_GPIO_BANK; |
44 | __SCx200_GPIO_IOADDR; | |
45 | __SCx200_GPIO_SHADOW; | |
46 | __SCx200_GPIO_INDEX; | |
47 | set_bit(index, shadow); | |
48 | __SCx200_GPIO_OUT; | |
49 | } | |
50 | ||
51 | /* drive the GPIO signal low */ | |
52 | ||
55b8c045 | 53 | static inline void scx200_gpio_set_low(unsigned index) { |
1da177e4 LT |
54 | __SCx200_GPIO_BANK; |
55 | __SCx200_GPIO_IOADDR; | |
56 | __SCx200_GPIO_SHADOW; | |
57 | __SCx200_GPIO_INDEX; | |
58 | clear_bit(index, shadow); | |
59 | __SCx200_GPIO_OUT; | |
60 | } | |
61 | ||
62 | /* drive the GPIO signal to state */ | |
63 | ||
55b8c045 | 64 | static inline void scx200_gpio_set(unsigned index, int state) { |
1da177e4 LT |
65 | __SCx200_GPIO_BANK; |
66 | __SCx200_GPIO_IOADDR; | |
67 | __SCx200_GPIO_SHADOW; | |
68 | __SCx200_GPIO_INDEX; | |
69 | if (state) | |
70 | set_bit(index, shadow); | |
71 | else | |
72 | clear_bit(index, shadow); | |
73 | __SCx200_GPIO_OUT; | |
74 | } | |
75 | ||
76 | /* toggle the GPIO signal */ | |
55b8c045 | 77 | static inline void scx200_gpio_change(unsigned index) { |
1da177e4 LT |
78 | __SCx200_GPIO_BANK; |
79 | __SCx200_GPIO_IOADDR; | |
80 | __SCx200_GPIO_SHADOW; | |
81 | __SCx200_GPIO_INDEX; | |
82 | change_bit(index, shadow); | |
83 | __SCx200_GPIO_OUT; | |
84 | } | |
85 | ||
86 | #undef __SCx200_GPIO_BANK | |
87 | #undef __SCx200_GPIO_IOADDR | |
88 | #undef __SCx200_GPIO_SHADOW | |
89 | #undef __SCx200_GPIO_INDEX | |
90 | #undef __SCx200_GPIO_OUT |