projects / mirror_ubuntu-artful-kernel.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]; | |
| 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 |