Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
422 | giacomo | 1 | #include <linux/spinlock.h> |
2 | |||
3 | u32 scx200_gpio_configure(int index, u32 set, u32 clear); |
||
4 | void scx200_gpio_dump(unsigned index); |
||
5 | |||
6 | extern unsigned scx200_gpio_base; |
||
7 | extern spinlock_t scx200_gpio_lock; |
||
8 | extern long scx200_gpio_shadow[2]; |
||
9 | |||
10 | #define scx200_gpio_present() (scx200_gpio_base!=0) |
||
11 | |||
12 | /* Definitions to make sure I do the same thing in all functions */ |
||
13 | #define __SCx200_GPIO_BANK unsigned bank = index>>5 |
||
14 | #define __SCx200_GPIO_IOADDR unsigned short ioaddr = scx200_gpio_base+0x10*bank |
||
15 | #define __SCx200_GPIO_SHADOW long *shadow = scx200_gpio_shadow+bank |
||
16 | #define __SCx200_GPIO_INDEX index &= 31 |
||
17 | |||
18 | #define __SCx200_GPIO_OUT __asm__ __volatile__("outsl":"=mS" (shadow):"d" (ioaddr), "0" (shadow)) |
||
19 | |||
20 | /* returns the value of the GPIO pin */ |
||
21 | |||
22 | static inline int scx200_gpio_get(int index) { |
||
23 | __SCx200_GPIO_BANK; |
||
24 | __SCx200_GPIO_IOADDR + 0x04; |
||
25 | __SCx200_GPIO_INDEX; |
||
26 | |||
27 | return (inl(ioaddr) & (1<<index)) ? 1 : 0; |
||
28 | } |
||
29 | |||
30 | /* return the value driven on the GPIO signal (the value that will be |
||
31 | driven if the GPIO is configured as an output, it might not be the |
||
32 | state of the GPIO right now if the GPIO is configured as an input) */ |
||
33 | |||
34 | static inline int scx200_gpio_current(int index) { |
||
35 | __SCx200_GPIO_BANK; |
||
36 | __SCx200_GPIO_INDEX; |
||
37 | |||
38 | return (scx200_gpio_shadow[bank] & (1<<index)) ? 1 : 0; |
||
39 | } |
||
40 | |||
41 | /* drive the GPIO signal high */ |
||
42 | |||
43 | static inline void scx200_gpio_set_high(int index) { |
||
44 | __SCx200_GPIO_BANK; |
||
45 | __SCx200_GPIO_IOADDR; |
||
46 | __SCx200_GPIO_SHADOW; |
||
47 | __SCx200_GPIO_INDEX; |
||
48 | set_bit(index, shadow); |
||
49 | __SCx200_GPIO_OUT; |
||
50 | } |
||
51 | |||
52 | /* drive the GPIO signal low */ |
||
53 | |||
54 | static inline void scx200_gpio_set_low(int index) { |
||
55 | __SCx200_GPIO_BANK; |
||
56 | __SCx200_GPIO_IOADDR; |
||
57 | __SCx200_GPIO_SHADOW; |
||
58 | __SCx200_GPIO_INDEX; |
||
59 | clear_bit(index, shadow); |
||
60 | __SCx200_GPIO_OUT; |
||
61 | } |
||
62 | |||
63 | /* drive the GPIO signal to state */ |
||
64 | |||
65 | static inline void scx200_gpio_set(int index, int state) { |
||
66 | __SCx200_GPIO_BANK; |
||
67 | __SCx200_GPIO_IOADDR; |
||
68 | __SCx200_GPIO_SHADOW; |
||
69 | __SCx200_GPIO_INDEX; |
||
70 | if (state) |
||
71 | set_bit(index, shadow); |
||
72 | else |
||
73 | clear_bit(index, shadow); |
||
74 | __SCx200_GPIO_OUT; |
||
75 | } |
||
76 | |||
77 | /* toggle the GPIO signal */ |
||
78 | static inline void scx200_gpio_change(int index) { |
||
79 | __SCx200_GPIO_BANK; |
||
80 | __SCx200_GPIO_IOADDR; |
||
81 | __SCx200_GPIO_SHADOW; |
||
82 | __SCx200_GPIO_INDEX; |
||
83 | change_bit(index, shadow); |
||
84 | __SCx200_GPIO_OUT; |
||
85 | } |
||
86 | |||
87 | #undef __SCx200_GPIO_BANK |
||
88 | #undef __SCx200_GPIO_IOADDR |
||
89 | #undef __SCx200_GPIO_SHADOW |
||
90 | #undef __SCx200_GPIO_INDEX |
||
91 | #undef __SCx200_GPIO_OUT |
||
92 | |||
93 | /* |
||
94 | Local variables: |
||
95 | compile-command: "make -C ../.. bzImage modules" |
||
96 | c-basic-offset: 8 |
||
97 | End: |
||
98 | */ |