/* Initialise the serial port. The settings are always 8 data bits, no parity,
* 1 stop bit, no start bits.
*/
static int serial_init_dev(const int dev_index)
{
struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart();
#ifdef CONFIG_HWFLOW
hwflow = 0; /* turned off by default */
#endif
/* FIFO enable, Tx/Rx FIFO clear */
writel(0x07, &uart->ufcon);
writel(0x0, &uart->umcon);
/* Normal,No parity,1 stop,8 bit */
writel(0x3, &uart->ulcon);
/*
* tx=level,rx=edge,disable timeout int.,enable rx error int.,
* normal,interrupt or polling
*/
writel(0x245, &uart->ucon);
#ifdef CONFIG_HWFLOW
writel(0x1, &uart->umcon); /* rts up */
#endif
/* FIXME: This is sooooooooooooooooooo ugly */
#if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2)
/* we need auto hw flow control on the gsm and gps port */
if (dev_index == 0 || dev_index == 1)
writel(0x10, &uart->umcon);
#endif
_serial_setbrg(dev_index);
return (0);
}
/*
* Read a single byte from the serial port. Returns 1 on success, 0
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
static int _serial_getc(const int dev_index)
{
struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart();
while (!(readl(&uart->utrstat) & 0x1))
/* wait for character to arrive */ ;
return readb(&uart->urxh) & 0xff;
}
static inline struct s5p_uart *s5p_get_base_uart(int dev_index)
{
u32 offset = dev_index * sizeof(struct s5p_uart);
// return (struct s5p_uart *)(samsung_get_base_uart() + offset);
#if defined(CONFIG_S5PC210) || defined(CONFIG_S5P6450) || defined(CONFIG_ARCH_EXYNOS)
return (struct s5p_uart *)samsung_get_base_uart();
#elif defined(CONFIG_S5PC110)
return (struct s5p_uart *)(0XE2900800);
#endif
}
static void _serial_setbrg(const int dev_index)
{
struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart();
unsigned int reg = 0;
int i;
/* value is calculated so : (int)(PCLK/16./baudrate) -1 */
reg = get_pclk() / (16 * gd->baudrate) - 1;
writel(reg, &uart->ubrdiv);
for (i = 0; i < 100; i++)
/* Delay */ ;
}
/*
* Output a single byte to the serial port.
*/
static void _serial_putc(const char c, const int dev_index)
{
struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart();
#ifdef CONFIG_MODEM_SUPPORT
if (be_quiet)
return;
#endif
while (!(readl(&uart->utrstat) & 0x2))
/* wait for room in the tx FIFO */ ;
#ifdef CONFIG_HWFLOW
while (hwflow && !(readl(&uart->umstat) & 0x1))
/* Wait for CTS up */ ;
#endif
writeb(c, &uart->utxh);
/* If \n, also do \r */
if (c == '\n')
serial_putc('\r');
}
static inline struct s5p_uart *s5p_get_base_uart(int dev_index)
{
u32 offset = dev_index * sizeof(struct s5p_uart);
return (struct s5p_uart *)(samsung_get_base_uart() + offset);
}
/*
* Test whether a character is in the RX buffer
*/
static int _serial_tstc(const int dev_index)
{
struct s3c_uart *uart = (struct s3c_uart *)samsung_get_base_uart();
return readl(&uart->utrstat) & 0x1;
}
