mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
#include <linux/spinlock.h>
|
|
|
|
u32 scx200_gpio_configure(int index, u32 set, u32 clear);
|
|
|
|
extern unsigned scx200_gpio_base;
|
|
extern long scx200_gpio_shadow[2];
|
|
|
|
#define scx200_gpio_present() (scx200_gpio_base!=0)
|
|
|
|
/* Definitions to make sure I do the same thing in all functions */
|
|
#define __SCx200_GPIO_BANK unsigned bank = index>>5
|
|
#define __SCx200_GPIO_IOADDR unsigned short ioaddr = scx200_gpio_base+0x10*bank
|
|
#define __SCx200_GPIO_SHADOW long *shadow = scx200_gpio_shadow+bank
|
|
#define __SCx200_GPIO_INDEX index &= 31
|
|
|
|
#define __SCx200_GPIO_OUT __asm__ __volatile__("outsl":"=mS" (shadow):"d" (ioaddr), "0" (shadow))
|
|
|
|
/* returns the value of the GPIO pin */
|
|
|
|
static inline int scx200_gpio_get(int index) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_IOADDR + 0x04;
|
|
__SCx200_GPIO_INDEX;
|
|
|
|
return (inl(ioaddr) & (1<<index)) ? 1 : 0;
|
|
}
|
|
|
|
/* return the value driven on the GPIO signal (the value that will be
|
|
driven if the GPIO is configured as an output, it might not be the
|
|
state of the GPIO right now if the GPIO is configured as an input) */
|
|
|
|
static inline int scx200_gpio_current(int index) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_INDEX;
|
|
|
|
return (scx200_gpio_shadow[bank] & (1<<index)) ? 1 : 0;
|
|
}
|
|
|
|
/* drive the GPIO signal high */
|
|
|
|
static inline void scx200_gpio_set_high(int index) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_IOADDR;
|
|
__SCx200_GPIO_SHADOW;
|
|
__SCx200_GPIO_INDEX;
|
|
set_bit(index, shadow);
|
|
__SCx200_GPIO_OUT;
|
|
}
|
|
|
|
/* drive the GPIO signal low */
|
|
|
|
static inline void scx200_gpio_set_low(int index) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_IOADDR;
|
|
__SCx200_GPIO_SHADOW;
|
|
__SCx200_GPIO_INDEX;
|
|
clear_bit(index, shadow);
|
|
__SCx200_GPIO_OUT;
|
|
}
|
|
|
|
/* drive the GPIO signal to state */
|
|
|
|
static inline void scx200_gpio_set(int index, int state) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_IOADDR;
|
|
__SCx200_GPIO_SHADOW;
|
|
__SCx200_GPIO_INDEX;
|
|
if (state)
|
|
set_bit(index, shadow);
|
|
else
|
|
clear_bit(index, shadow);
|
|
__SCx200_GPIO_OUT;
|
|
}
|
|
|
|
/* toggle the GPIO signal */
|
|
static inline void scx200_gpio_change(int index) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_IOADDR;
|
|
__SCx200_GPIO_SHADOW;
|
|
__SCx200_GPIO_INDEX;
|
|
change_bit(index, shadow);
|
|
__SCx200_GPIO_OUT;
|
|
}
|
|
|
|
#undef __SCx200_GPIO_BANK
|
|
#undef __SCx200_GPIO_IOADDR
|
|
#undef __SCx200_GPIO_SHADOW
|
|
#undef __SCx200_GPIO_INDEX
|
|
#undef __SCx200_GPIO_OUT
|
|
|
|
/*
|
|
Local variables:
|
|
compile-command: "make -C ../.. bzImage modules"
|
|
c-basic-offset: 8
|
|
End:
|
|
*/
|