diff options
Diffstat (limited to 'arch/arm/cpu/arm926ejs')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/at91/at91sam9rl_devices.c | 74 |
1 files changed, 35 insertions, 39 deletions
diff --git a/arch/arm/cpu/arm926ejs/at91/at91sam9rl_devices.c b/arch/arm/cpu/arm926ejs/at91/at91sam9rl_devices.c index 4f570f4fb5..b0a16874d6 100644 --- a/arch/arm/cpu/arm926ejs/at91/at91sam9rl_devices.c +++ b/arch/arm/cpu/arm926ejs/at91/at91sam9rl_devices.c @@ -23,77 +23,73 @@ */ #include <common.h> +#include <asm/io.h> #include <asm/arch/at91_common.h> #include <asm/arch/at91_pmc.h> #include <asm/arch/gpio.h> -#include <asm/arch/io.h> + +/* + * if CONFIG_AT91_GPIO_PULLUP ist set, keep pullups on on all + * peripheral pins. Good to have if hardware is soldered optionally + * or in case of SPI no slave is selected. Avoid lines to float + * needlessly. Use a short local PUP define. + * + * Due to errata "TXD floats when CTS is inactive" pullups are always + * on for TXD pins. + */ +#ifdef CONFIG_AT91_GPIO_PULLUP +# define PUP CONFIG_AT91_GPIO_PULLUP +#else +# define PUP 0 +#endif void at91_serial0_hw_init(void) { - at91_pmc_t *pmc = (at91_pmc_t *) AT91_PMC_BASE; + at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC; at91_set_a_periph(AT91_PIO_PORTA, 6, 1); /* TXD0 */ - at91_set_a_periph(AT91_PIO_PORTA, 7, 0); /* RXD0 */ - writel(1 << AT91SAM9RL_ID_US0, &pmc->pcer); + at91_set_a_periph(AT91_PIO_PORTA, 7, PUP); /* RXD0 */ + writel(1 << ATMEL_ID_USART0, &pmc->pcer); } void at91_serial1_hw_init(void) { - at91_pmc_t *pmc = (at91_pmc_t *) AT91_PMC_BASE; + at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC; at91_set_a_periph(AT91_PIO_PORTA, 11, 1); /* TXD1 */ - at91_set_a_periph(AT91_PIO_PORTA, 12, 0); /* RXD1 */ - writel(1 << AT91SAM9RL_ID_US1, &pmc->pcer); + at91_set_a_periph(AT91_PIO_PORTA, 12, PUP); /* RXD1 */ + writel(1 << ATMEL_ID_USART1, &pmc->pcer); } void at91_serial2_hw_init(void) { - at91_pmc_t *pmc = (at91_pmc_t *) AT91_PMC_BASE; + at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC; at91_set_a_periph(AT91_PIO_PORTA, 13, 1); /* TXD2 */ - at91_set_a_periph(AT91_PIO_PORTA, 14, 0); /* RXD2 */ - writel(1 << AT91SAM9RL_ID_US2, &pmc->pcer); + at91_set_a_periph(AT91_PIO_PORTA, 14, PUP); /* RXD2 */ + writel(1 << ATMEL_ID_USART2, &pmc->pcer); } -void at91_serial3_hw_init(void) +void at91_seriald_hw_init(void) { - at91_pmc_t *pmc = (at91_pmc_t *) AT91_PMC_BASE; + at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC; - at91_set_a_periph(AT91_PIO_PORTA, 21, 0); /* DRXD */ + at91_set_a_periph(AT91_PIO_PORTA, 21, PUP); /* DRXD */ at91_set_a_periph(AT91_PIO_PORTA, 22, 1); /* DTXD */ - writel(1 << AT91_ID_SYS, &pmc->pcer); -} - -void at91_serial_hw_init(void) -{ -#ifdef CONFIG_USART0 - at91_serial0_hw_init(); -#endif - -#ifdef CONFIG_USART1 - at91_serial1_hw_init(); -#endif - -#ifdef CONFIG_USART2 - at91_serial2_hw_init(); -#endif - -#ifdef CONFIG_USART3 /* DBGU */ - at91_serial3_hw_init(); -#endif + writel(1 << ATMEL_ID_SYS, &pmc->pcer); } -#ifdef CONFIG_HAS_DATAFLASH +#if defined(CONFIG_HAS_DATAFLASH) || defined(CONFIG_ATMEL_SPI) void at91_spi0_hw_init(unsigned long cs_mask) { - at91_pmc_t *pmc = (at91_pmc_t *) AT91_PMC_BASE; + at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC; - at91_set_a_periph(AT91_PIO_PORTA, 25, 0); /* SPI0_MISO */ - at91_set_a_periph(AT91_PIO_PORTA, 26, 0); /* SPI0_MOSI */ - at91_set_a_periph(AT91_PIO_PORTA, 27, 0); /* SPI0_SPCK */ + at91_set_a_periph(AT91_PIO_PORTA, 25, PUP); /* SPI0_MISO */ + at91_set_a_periph(AT91_PIO_PORTA, 26, PUP); /* SPI0_MOSI */ + at91_set_a_periph(AT91_PIO_PORTA, 27, PUP); /* SPI0_SPCK */ /* Enable clock */ - writel(1 << AT91SAM9RL_ID_SPI, &pmc->pcer); + writel(1 << ATMEL_ID_SPI, &pmc->pcer); if (cs_mask & (1 << 0)) { at91_set_a_periph(AT91_PIO_PORTA, 28, 1); |