static int atmel_serial_pending(struct udevice *dev, bool input)
{
struct atmel_serial_priv *priv = dev_get_priv(dev);
uint32_t csr = readl(&priv->usart->csr);
if (input)
return csr & USART3_BIT(RXRDY) ? 1 : 0;
else
return csr & USART3_BIT(TXEMPTY) ? 0 : 1;
}
static void atmel_serial_init_internal(atmel_usart3_t *usart)
{
/*
* Just in case: drain transmitter register
* 1000us is enough for baudrate >= 9600
*/
if (!(readl(&usart->csr) & USART3_BIT(TXEMPTY)))
__udelay(1000);
writel(USART3_BIT(RSTRX) | USART3_BIT(RSTTX), &usart->cr);
}
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)
| USART3_BF(PAR, USART3_PAR_NONE)
| USART3_BF(NBSTOP, USART3_NBSTOP_1)),
&usart->mr);
writel(USART3_BIT(RXEN) | USART3_BIT(TXEN), &usart->cr);
/* 100us is enough for the new settings to be settled */
__udelay(100);
}
int serial_init(void)
{
usart3_writel(CR, USART3_BIT(RSTRX) | USART3_BIT(RSTTX));
serial_setbrg();
usart3_writel(CR, USART3_BIT(RXEN) | USART3_BIT(TXEN));
usart3_writel(MR, (USART3_BF(USART_MODE, USART3_USART_MODE_NORMAL)
| USART3_BF(USCLKS, USART3_USCLKS_MCK)
| USART3_BF(CHRL, USART3_CHRL_8)
| USART3_BF(PAR, USART3_PAR_NONE)
| USART3_BF(NBSTOP, USART3_NBSTOP_1)));
return 0;
}
void serial_putc(char c)
{
if (c == '\n')
serial_putc('\r');
while (!(usart3_readl(CSR) & USART3_BIT(TXRDY))) ;
usart3_writel(THR, c);
}
static int atmel_serial_getc(void)
{
atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
while (!(readl(&usart->csr) & USART3_BIT(RXRDY)))
WATCHDOG_RESET();
return readl(&usart->rhr);
}
static inline void _debug_uart_putc(int ch)
{
atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_DEBUG_UART_BASE;
while (!(readl(&usart->csr) & USART3_BIT(TXRDY)))
;
writel(ch, &usart->thr);
}
static int atmel_serial_getc(struct udevice *dev)
{
struct atmel_serial_priv *priv = dev_get_priv(dev);
if (!(readl(&priv->usart->csr) & USART3_BIT(RXRDY)))
return -EAGAIN;
return readl(&priv->usart->rhr);
}
static void atmel_serial_putc(char c)
{
atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
if (c == '\n')
serial_putc('\r');
while (!(readl(&usart->csr) & USART3_BIT(TXRDY)));
writel(c, &usart->thr);
}
static int atmel_serial_putc(struct udevice *dev, const char ch)
{
struct atmel_serial_priv *priv = dev_get_priv(dev);
if (!(readl(&priv->usart->csr) & USART3_BIT(TXRDY)))
return -EAGAIN;
writel(ch, &priv->usart->thr);
return 0;
}
void _atmel_serial_init(atmel_usart3_t *usart,
ulong usart_clk_rate, int baudrate)
{
writel(USART3_BIT(RXDIS) | USART3_BIT(TXDIS), &usart->cr);
writel((USART3_BF(USART_MODE, USART3_USART_MODE_NORMAL) |
USART3_BF(USCLKS, USART3_USCLKS_MCK) |
USART3_BF(CHRL, USART3_CHRL_8) |
USART3_BF(PAR, USART3_PAR_NONE) |
USART3_BF(NBSTOP, USART3_NBSTOP_1)), &usart->mr);
_atmel_serial_set_brg(usart, usart_clk_rate, baudrate);
writel(USART3_BIT(RSTRX) | USART3_BIT(RSTTX), &usart->cr);
writel(USART3_BIT(RXEN) | USART3_BIT(TXEN), &usart->cr);
}
int serial_tstc(void)
{
return (usart3_readl(CSR) & USART3_BIT(RXRDY)) != 0;
}
int serial_getc(void)
{
while (!(usart3_readl(CSR) & USART3_BIT(RXRDY)))
WATCHDOG_RESET();
return usart3_readl(RHR);
}
int serial_tstc(void)
{
return (usart3_readl(gd->console_uart, CSR) & USART3_BIT(RXRDY)) != 0;
}
int serial_getc(void)
{
while (!(usart3_readl(gd->console_uart, CSR) & USART3_BIT(RXRDY))) ;
return usart3_readl(gd->console_uart, RHR);
}
static int atmel_serial_tstc(void)
{
atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
return (readl(&usart->csr) & USART3_BIT(RXRDY)) != 0;
}
