133 lines
2.4 KiB
C
133 lines
2.4 KiB
C
#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/rda_iomap.h>
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#include <asm/arch/reg_sysctrl.h>
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#include <asm/arch/reg_uart.h>
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DECLARE_GLOBAL_DATA_PTR;
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void _serial_set_baudrate(int rate)
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{
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hwp_sysCtrlAp->Cfg_Clk_Uart[2] = 0x36; // 115200 @ 26MHz
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//hwp_sysCtrlAp->Cfg_Clk_Uart[2] = 0x05; // 921600 @ 26MHz
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}
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void _serial_enable_rtscts(void)
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{
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hwp_uart->ctrl |= UART_AUTO_FLOW_CONTROL;
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}
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void _serial_disable_rtscts(void)
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{
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hwp_uart->ctrl &= ~UART_AUTO_FLOW_CONTROL;
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}
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void _serial_init(void)
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{
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_serial_set_baudrate(CONFIG_BAUDRATE);
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hwp_uart->triggers = UART_AFC_LEVEL(1); //7 ?
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hwp_uart->ctrl = UART_ENABLE | UART_DATA_BITS_8_BITS |
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UART_TX_STOP_BITS_1_BIT | UART_PARITY_ENABLE_NO;
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/* Allow reception */
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hwp_uart->CMD_Set = UART_RTS;
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}
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void _serial_deinit(void)
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{
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hwp_uart->ctrl = 0;
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hwp_uart->CMD_Clr = UART_RTS;
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}
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/*
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* Test whether a character is in the RX buffer
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*/
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int _serial_tstc(const int port)
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{
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return (GET_BITFIELD(hwp_uart->status, UART_RX_FIFO_LEVEL));
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}
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int _serial_getc(const int port)
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{
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/* wait for character to arrive */ ;
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while (!(GET_BITFIELD(hwp_uart->status, UART_RX_FIFO_LEVEL)))
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;
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return (hwp_uart->rxtx_buffer & 0xff);
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}
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void _serial_putc_hw(const char c, const int port)
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{
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// Place in the TX Fifo ?
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while (!(GET_BITFIELD(hwp_uart->status, UART_TX_FIFO_SPACE)))
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;
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hwp_uart->rxtx_buffer = (u32)c;
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}
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void _serial_putc(const char c, const int port)
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{
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if (c == '\n') {
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_serial_putc_hw('\r', 0);
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}
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_serial_putc_hw(c, 0);
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}
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void _serial_puts(const char *s, const int port)
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{
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while (*s) {
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_serial_putc(*s++, 0);
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}
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}
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static int hwflow = 0; /* turned off by default */
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int hwflow_onoff(int on)
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{
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switch(on) {
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case 0:
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default:
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break; /* return current */
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case 1:
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hwflow = 1;
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_serial_enable_rtscts(); /* turn on */
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break;
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case -1:
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hwflow = 0;
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_serial_disable_rtscts(); /* turn off */
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break;
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}
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return hwflow;
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}
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int serial_init(void)
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{
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//_serial_init(); // already init in boot_test
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return 0;
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}
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int serial_getc(void)
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{
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return _serial_getc(0);
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}
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int serial_tstc(void)
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{
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return _serial_tstc(0);
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}
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void serial_putc(const char c)
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{
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_serial_putc(c, 0);
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}
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void serial_puts(const char *s)
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{
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_serial_puts(s, 0);
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}
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void serial_setbrg (void)
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{
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}
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