/* 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)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
/* FIFO enable, Tx/Rx FIFO clear */
uart->UFCON = 0x07;
uart->UMCON = 0x0;
/* Normal,No parity,1 stop,8 bit */
uart->ULCON = 0x3;
/*
* tx=level,rx=edge,disable timeout int.,enable rx error int.,
* normal,interrupt or polling
*/
uart->UCON = 0x245;
#ifdef CONFIG_HWFLOW
uart->UMCON = 0x1; /* 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)
uart->UMCON = 0x10;
#endif
_serial_setbrg(dev_index);
return (0);
}
void serial_setbrg (void)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
int i;
unsigned int reg = 0;
/* value is calculated so : (int)(PCLK/16./baudrate) -1 */
reg = get_PCLK() / (16 * gd->baudrate) - 1;
/* FIFO enable, Tx/Rx FIFO clear */
uart->UFCON = 0x07;
uart->UMCON = 0x0;
/* Normal,No parity,1 stop,8 bit */
uart->ULCON = 0x3;
/*
* tx=level,rx=edge,disable timeout int.,enable rx error int.,
* normal,interrupt or polling
*/
uart->UCON = 0x245;
uart->UBRDIV = reg;
#ifdef CONFIG_HWFLOW
uart->UMCON = 0x1; /* RTS up */
#endif
for (i = 0; i < 100; i++);
}
__u8 do_getc(unsigned long timeout, int *statp)
{
__u8 c, rxstat;
int do_timeout = timeout != 0;
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
getc_errno = 0; /* reste errno */
while(!(uart->UTRSTAT & 0x1)) {
if (do_timeout) {
if (!timeout)
break;
timeout--;
}
}
if (do_timeout && timeout == 0) {
c = 0;
rxstat = -1;
} else {
c = (uart->URXH & 0xff);
rxstat = (uart->UERSTAT & 0xf);
}
if (rxstat) {
getc_errno = rxstat;
if (statp)
*statp = rxstat;
}
return (c);
}
void put_onechar(uint8_t ch)
{
S3C24X0_UART *const uart0 = S3C24X0_GetBase_UART(0);
while(!(uart0->UTRSTAT & UTRSTAT_TRANS_EMPTY))
;
uart0->UTXH = ch;
}
void init_uart()
{ /*get uart0 reg addr*/
S3C24X0_UART *const uart0 = S3C24X0_GetBase_UART(0);
/*stop bit:1bit,word len 8bit,no parity bit*/
uart0->ULCON = ULCON_PARITY_MODE | ULCON_STOP_BIT | ULCON_WORD_LEN;
/*pclk,tx and rx int type:level,trans and recv mode :poll or interrupt*/
uart0->UCON = UCON_CLOCK_SEL|UCON_TX_INT_TYPE|UCON_RX_INT_TYPE|UCON_RX_TIME_OUT|UCON_RX_ERROR_STS|UCON_TX_MODE|UCON_RX_MODE;
}
uint8_t get_onechar()
{
uint8_t value;
S3C24X0_UART *const uart0 = S3C24X0_GetBase_UART(0);
while(!(uart0->UTRSTAT & UTRSTAT_RECV_BUF_READY))
;
value = uart0->URXH;
return value;
}
/*
* 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.
*/
int _serial_getc (const int dev_index)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
/* wait for character to arrive */
while (!(uart->UTRSTAT & 0x1));
return uart->URXH & 0xff;
}
/*
* 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.
*/
int serial_getc (void)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
/* wait for character to arrive */
while (!(uart->UTRSTAT & 0x1));
return uart->URXH & 0xff;
}
void _serial_setbrg(const int dev_index)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
unsigned int reg = 0;
int i;
/* value is calculated so : (int)(PCLK/16./baudrate) -1 */
reg = get_PCLK() / (16 * gd->baudrate) - 1;
uart->UBRDIV = reg;
for (i = 0; i < 100; i++);
}
/*
* Output a single byte to the serial port.
*/
void serial_putc(const char c)
{
S3C24X0_UART *const uart = S3C24X0_GetBase_UART(S3C24X0_UART0);
/* wait for room in the tx FIFO */
while (!(uart->UTRSTAT & 0x2));
uart->UTXH = c;
/* If \n, also do \r */
if (c == '\n')
serial_putc('\r');
}
void init_baud(uint32_t baud)
{
uint32_t ubrdivn;
S3C24X0_UART * const uart0 = S3C24X0_GetBase_UART(0);
/*stop bit:1bit,word len 8bit,no parity bit*/
uart0->ULCON = ULCON_PARITY_MODE | ULCON_STOP_BIT | ULCON_WORD_LEN;
/*pclk,tx and rx int type:level,trans and recv mode :poll or interrupt*/
uart0->UCON = UCON_CLOCK_SEL|UCON_TX_INT_TYPE|UCON_RX_INT_TYPE|UCON_RX_TIME_OUT|UCON_RX_ERROR_STS|UCON_TX_MODE|UCON_RX_MODE;
ubrdivn = (clkpara.pclk/(baud*16));
ubrdivn -= 1;
uart0->UBRDIV0 = ubrdivn;
}
/*
* Output a single byte to the serial port.
*/
void _serial_putc (const char c, const int dev_index)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
#ifdef CONFIG_MODEM_SUPPORT
if (be_quiet)
return;
#endif
/* wait for room in the tx FIFO */
while (!(uart->UTRSTAT & 0x2));
#ifdef CONFIG_HWFLOW
/* Wait for CTS up */
while(hwflow && !(uart->UMSTAT & 0x1))
;
#endif
uart->UTXH = c;
/* If \n, also do \r */
if (c == '\n')
serial_putc ('\r');
}
/*
* Test whether a character is in the RX buffer
*/
int _serial_tstc(const int dev_index)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
return uart->UTRSTAT & 0x1;
}
/*
* Test whether a character is in the RX buffer
*/
int serial_tstc (void)
{
S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
return uart->UTRSTAT & 0x1;
}
