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