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Add structure-based GPIO register definitions

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This commit is contained in:
Jim Paris 2010-09-24 16:27:59 -04:00
parent 1a014bab1b
commit 7fb074c060
1 changed files with 60 additions and 0 deletions
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60
lib/include/gpio.h
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@ -36,6 +36,64 @@
#ifndef GPIO_H #ifndef GPIO_H
#define GPIO_H #define GPIO_H
/* Structure-based GPIO access
Example usage:
GPIO.FUNC_SEL0 |= 0x00008000; // set a whole register
GPIO.FUNC_SEL_08 = 2; // set just one pin
#define MY_PIN GPIO_08
GPIO.FUNC_SEL.MY_PIN = 2; // same, to allow #define for pin names
GPIO.DATA.MY_PIN = 1;
*/
#define _V(x,n,i) uint32_t x##_##i : n;
#define _REP(x,n) \
_V(x,n,00) _V(x,n,01) _V(x,n,02) _V(x,n,03) _V(x,n,04) _V(x,n,05) _V(x,n,06) _V(x,n,07) \
_V(x,n,08) _V(x,n,09) _V(x,n,10) _V(x,n,11) _V(x,n,12) _V(x,n,13) _V(x,n,14) _V(x,n,15) \
_V(x,n,16) _V(x,n,17) _V(x,n,18) _V(x,n,19) _V(x,n,20) _V(x,n,21) _V(x,n,22) _V(x,n,23) \
_V(x,n,24) _V(x,n,25) _V(x,n,26) _V(x,n,27) _V(x,n,28) _V(x,n,29) _V(x,n,30) _V(x,n,31) \
_V(x,n,32) _V(x,n,33) _V(x,n,34) _V(x,n,35) _V(x,n,36) _V(x,n,37) _V(x,n,38) _V(x,n,39) \
_V(x,n,40) _V(x,n,41) _V(x,n,42) _V(x,n,43) _V(x,n,44) _V(x,n,45) _V(x,n,46) _V(x,n,47) \
_V(x,n,48) _V(x,n,49) _V(x,n,50) _V(x,n,51) _V(x,n,52) _V(x,n,53) _V(x,n,54) _V(x,n,55) \
_V(x,n,56) _V(x,n,57) _V(x,n,58) _V(x,n,59) _V(x,n,60) _V(x,n,61) _V(x,n,62) _V(x,n,63)
struct GPIO_struct {
#define _IO(x) \
union { struct { uint32_t x##0; uint32_t x##1; }; \
struct { _REP(x, 1) }; \
struct { _REP(GPIO, 1) } x; };
#define _IO_2bit(x) \
union { struct { uint32_t x##0; uint32_t x##1; uint32_t x##2; uint32_t x##3; }; \
struct { _REP(x, 2) }; \
struct { _REP(GPIO, 2) } x; };
_IO(PAD_DIR);
_IO(DATA);
_IO(PAD_PU_EN);
_IO_2bit(FUNC_SEL);
_IO(DATA_SEL);
_IO(PAD_PU_SEL);
_IO(PAD_HYST_EN);
_IO(PAD_KEEP);
_IO(DATA_SET);
_IO(DATA_RESET);
_IO(PAD_DIR_SET);
_IO(PAD_DIR_RESET);
};
#undef _IO
#undef _IO_2bit
#undef _REP
#undef _V
static volatile struct GPIO_struct * const _GPIO = (void *) (0x80000000);
#define GPIO (*_GPIO)
/* Old register definitions, for compatibility */
#ifndef REG_NO_COMPAT
#define GPIO_PAD_DIR0 ((volatile uint32_t *) 0x80000000) #define GPIO_PAD_DIR0 ((volatile uint32_t *) 0x80000000)
#define GPIO_PAD_DIR1 ((volatile uint32_t *) 0x80000004) #define GPIO_PAD_DIR1 ((volatile uint32_t *) 0x80000004)
#define GPIO_DATA0 ((volatile uint32_t *) 0x80000008) #define GPIO_DATA0 ((volatile uint32_t *) 0x80000008)
@ -87,4 +145,6 @@ inline void gpio_pad_dir_reset(volatile uint64_t data);
#define gpio_pu1_enable(b) (set_bit(*GPIO_PAD_PU_EN1,b-32)) #define gpio_pu1_enable(b) (set_bit(*GPIO_PAD_PU_EN1,b-32))
#define gpio_pu1_disable(b) (clear_bit(*GPIO_PAD_PU_EN1,b-32)) #define gpio_pu1_disable(b) (clear_bit(*GPIO_PAD_PU_EN1,b-32))
#endif /* REG_NO_COMPAT */
#endif #endif