50 lines
897 B
C
50 lines
897 B
C
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#include <console/console.h>
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#include <uart8250.h>
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#include <pc80/mc146818rtc.h>
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/* Base Address */
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#ifndef TTYS0_BASE
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#define TTYS0_BASE 0x3f8
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#endif
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#ifndef TTYS0_BAUD
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#define TTYS0_BAUD 115200
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#endif
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#if ((115200%TTYS0_BAUD) != 0)
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#error Bad ttys0 baud rate
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#endif
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#define TTYS0_DIV (115200/TTYS0_BAUD)
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/* Line Control Settings */
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#ifndef TTYS0_LCS
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/* Set 8bit, 1 stop bit, no parity */
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#define TTYS0_LCS 0x3
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#endif
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#define UART_LCS TTYS0_LCS
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void ttyS0_init(void)
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{
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static unsigned char div[8]={1,2,3,6,12,24,48,96};
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int b_index=0;
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unsigned int divisor=TTYS0_DIV;
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if(get_option(&b_index,"baud_rate")==0) {
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divisor=div[b_index];
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}
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uart8250_init(TTYS0_BASE, divisor, TTYS0_LCS);
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}
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void ttyS0_tx_byte(unsigned char data)
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{
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uart8250_tx_byte(TTYS0_BASE, data);
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}
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static struct console_driver uart8250_console __console = {
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.init = ttyS0_init,
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.tx_byte = ttyS0_tx_byte,
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};
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