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-rw-r--r--arch/arm/cpu/arm926ejs/at91/at91sam9rl_devices.c74
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 4f570f4..b0a1687 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);