/*
* Intialise the serial port with given baudrate
*/
int serial_init_port (int port)
{
int ret;
unsigned port_base = port_base_addrs[port];
// serial_puts_port(port," ");
while((readl(P_UART_STATUS(port_base)) & (UART_STAT_MASK_XMIT_BUSY)));
writel(0,P_UART_CONTROL(port_base));
ret = serial_set_pin_port(port);
if (ret < 0)
return -1;
serial_setbrg_port(port);
#ifndef CONFIG_SERIAL_STP_BITS
#define CONFIG_SERIAL_STP_BITS 1
#endif
serial_set_stop_port(port,CONFIG_SERIAL_STP_BITS);
#ifndef CONFIG_SERIAL_PRTY_TYPE
#define CONFIG_SERIAL_PRTY_TYPE 0
#endif
serial_set_parity_port(port,CONFIG_SERIAL_PRTY_TYPE);
#ifndef CONFIG_SERIAL_CHAR_LEN
#define CONFIG_SERIAL_CHAR_LEN 8
#endif
serial_set_dlen_port(port,CONFIG_SERIAL_CHAR_LEN);
writel(readl(P_UART_CONTROL(port_base)) | UART_CNTL_MASK_TX_EN | UART_CNTL_MASK_RX_EN, P_UART_CONTROL(port_base));
while(!(readl(P_UART_STATUS(port_base)) & UART_STAT_MASK_TFIFO_EMPTY));
serial_reset_port(port);
while((readl(P_UART_STATUS(port_base)) & (UART_STAT_MASK_XMIT_BUSY)));
serial_putc_port(port,'\n');
return 0;
}
static void serial_init(unsigned set,unsigned tag)
{
if(arc_param->serial_disable)
return;
/* baud rate */
/*unsigned baud_para=0;*/
if(tag){//reset uart.
setbits_le32(P_AO_RTI_GEN_CNTL_REG0,1<<17);
clrbits_le32(P_AO_RTI_GEN_CNTL_REG0,1<<17);
delay_ms(10);
//delay_tick(32*1000);
//delay_tick(32*1000);
}
writel((set&0xfff)
| UART_STP_BIT
| UART_PRTY_BIT
| UART_CHAR_LEN
//please do not remove these setting , jerry.yu
| UART_CNTL_MASK_TX_EN
| UART_CNTL_MASK_RX_EN
| UART_CNTL_MASK_RST_TX
| UART_CNTL_MASK_RST_RX
| UART_CNTL_MASK_CLR_ERR
,P_UART_CONTROL(UART_PORT_CONS));
clrsetbits_le32(P_AO_UART_MISC ,0xf<<20,(set&0xf000)<<8);
serial_set_pin_port(UART_PORT_CONS);
clrbits_le32(P_UART_CONTROL(UART_PORT_CONS),
UART_CNTL_MASK_RST_TX | UART_CNTL_MASK_RST_RX | UART_CNTL_MASK_CLR_ERR);
}
SPL_STATIC_FUNC void serial_init(unsigned set)
{
/* baud rate */
writel(set
|UART_CNTL_MASK_RST_TX
|UART_CNTL_MASK_RST_RX
|UART_CNTL_MASK_CLR_ERR
|UART_CNTL_MASK_TX_EN
|UART_CNTL_MASK_RX_EN
,P_UART_CONTROL(UART_PORT_CONS));
switch(readl(0xd9040004))
{
case 0x74e: //M8B revA
case 0xb72: //M8M2 revA
writel( (1<<24)|(1 << 23)|((8000000/(CONFIG_BAUDRATE)) -1),0xc81004d4); // set xtal as M8B/M8M2 uart-ao clock source,xtal is 24000000,
//new baudrate formula is (24000000/3/baudrate),0xc81004d4 is AO_UART0_REG5 address
break;
}
serial_set_pin_port(UART_PORT_CONS);
clrbits_le32(P_UART_CONTROL(UART_PORT_CONS),
UART_CNTL_MASK_RST_TX | UART_CNTL_MASK_RST_RX | UART_CNTL_MASK_CLR_ERR);
}