diff options
Diffstat (limited to 'cpu/ppc4xx/gpio.c')
| -rw-r--r-- | cpu/ppc4xx/gpio.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/cpu/ppc4xx/gpio.c b/cpu/ppc4xx/gpio.c index fb0f575..5235203 100644 --- a/cpu/ppc4xx/gpio.c +++ b/cpu/ppc4xx/gpio.c @@ -103,6 +103,18 @@ void gpio_write_bit(int pin, int val) out32(GPIO0_OR + offs, in32(GPIO0_OR + offs) & ~GPIO_VAL(pin)); } +int gpio_read_out_bit(int pin) +{ + u32 offs = 0; + + if (pin >= GPIO_MAX) { + offs = 0x100; + pin -= GPIO_MAX; + } + + return (in32(GPIO0_OR + offs) & GPIO_VAL(pin) ? 1 : 0); +} + #if defined(CFG_440_GPIO_TABLE) void gpio_set_chip_configuration(void) { @@ -157,11 +169,37 @@ void gpio_set_chip_configuration(void) switch (gpio_tab[gpio_core][i].alt_nb) { case GPIO_SEL: if (gpio_core == GPIO0) { + /* + * Setup output value + * 1 -> high level + * 0 -> low level + * else -> don't touch + */ + reg = in32(GPIO0_OR); + if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_1) + reg |= (0x80000000 >> (i)); + else if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_0) + reg &= ~(0x80000000 >> (i)); + out32(GPIO0_OR, reg); + reg = in32(GPIO0_TCR) | (0x80000000 >> (i)); out32(GPIO0_TCR, reg); } if (gpio_core == GPIO1) { + /* + * Setup output value + * 1 -> high level + * 0 -> low level + * else -> don't touch + */ + reg = in32(GPIO0_OR); + if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_1) + reg |= (0x80000000 >> (i)); + else if (gpio_tab[gpio_core][i].out_val == GPIO_OUT_0) + reg &= ~(0x80000000 >> (i)); + out32(GPIO0_OR, reg); + reg = in32(GPIO1_TCR) | (0x80000000 >> (i)); out32(GPIO1_TCR, reg); } |