mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 16:13:54 +08:00
64b33619a3
deal with signedness of the stuff passed to set_bit() et.al. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
u32 scx200_gpio_configure(unsigned index, u32 set, u32 clear);
|
|
|
|
extern unsigned scx200_gpio_base;
|
|
extern unsigned long scx200_gpio_shadow[2];
|
|
extern struct nsc_gpio_ops scx200_gpio_ops;
|
|
|
|
#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 unsigned 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(unsigned 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(unsigned 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(unsigned index) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_IOADDR;
|
|
__SCx200_GPIO_SHADOW;
|
|
__SCx200_GPIO_INDEX;
|
|
set_bit(index, shadow); /* __set_bit()? */
|
|
__SCx200_GPIO_OUT;
|
|
}
|
|
|
|
/* drive the GPIO signal low */
|
|
|
|
static inline void scx200_gpio_set_low(unsigned index) {
|
|
__SCx200_GPIO_BANK;
|
|
__SCx200_GPIO_IOADDR;
|
|
__SCx200_GPIO_SHADOW;
|
|
__SCx200_GPIO_INDEX;
|
|
clear_bit(index, shadow); /* __clear_bit()? */
|
|
__SCx200_GPIO_OUT;
|
|
}
|
|
|
|
/* drive the GPIO signal to state */
|
|
|
|
static inline void scx200_gpio_set(unsigned 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(unsigned 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
|