diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/serial/atmel_usart.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/drivers/serial/atmel_usart.c b/drivers/serial/atmel_usart.c index 8f0e348..ce36e99 100644 --- a/drivers/serial/atmel_usart.c +++ b/drivers/serial/atmel_usart.c @@ -19,9 +19,9 @@ DECLARE_GLOBAL_DATA_PTR; -static void atmel_serial_setbrg(void) +static void atmel_serial_setbrg_internal(atmel_usart3_t *usart, int id, + int baudrate) { - atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE; unsigned long divisor; unsigned long usart_hz; @@ -30,15 +30,13 @@ static void atmel_serial_setbrg(void) * Baud Rate = -------------- * 16 * CD */ - usart_hz = get_usart_clk_rate(CONFIG_USART_ID); - divisor = (usart_hz / 16 + gd->baudrate / 2) / gd->baudrate; + usart_hz = get_usart_clk_rate(id); + divisor = (usart_hz / 16 + baudrate / 2) / baudrate; writel(USART3_BF(CD, divisor), &usart->brgr); } -static int atmel_serial_init(void) +static void atmel_serial_init_internal(atmel_usart3_t *usart) { - atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE; - /* * Just in case: drain transmitter register * 1000us is enough for baudrate >= 9600 @@ -47,9 +45,10 @@ static int atmel_serial_init(void) __udelay(1000); writel(USART3_BIT(RSTRX) | USART3_BIT(RSTTX), &usart->cr); +} - serial_setbrg(); - +static void atmel_serial_activate(atmel_usart3_t *usart) +{ writel((USART3_BF(USART_MODE, USART3_USART_MODE_NORMAL) | USART3_BF(USCLKS, USART3_USCLKS_MCK) | USART3_BF(CHRL, USART3_CHRL_8) @@ -59,6 +58,21 @@ static int atmel_serial_init(void) writel(USART3_BIT(RXEN) | USART3_BIT(TXEN), &usart->cr); /* 100us is enough for the new settings to be settled */ __udelay(100); +} + +static void atmel_serial_setbrg(void) +{ + atmel_serial_setbrg_internal((atmel_usart3_t *)CONFIG_USART_BASE, + CONFIG_USART_ID, gd->baudrate); +} + +static int atmel_serial_init(void) +{ + atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE; + + atmel_serial_init_internal(usart); + serial_setbrg(); + atmel_serial_activate(usart); return 0; } |