mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-17 07:54:54 +08:00
c43756da94
Because Qube1 doesn't have a serial chip waiting for transmit fifo empty takes forever, which isn't a good idea. No prom_putchar/early console for Qube1 fixes this. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
21 lines
343 B
C
21 lines
343 B
C
/*
|
|
* (C) P. Horton 2006
|
|
*/
|
|
#include <linux/io.h>
|
|
#include <linux/serial_reg.h>
|
|
|
|
#include <cobalt.h>
|
|
|
|
#define UART_BASE ((void __iomem *)CKSEG1ADDR(0x1c800000))
|
|
|
|
void prom_putchar(char c)
|
|
{
|
|
if (cobalt_board_id <= COBALT_BRD_ID_QUBE1)
|
|
return;
|
|
|
|
while (!(readb(UART_BASE + UART_LSR) & UART_LSR_THRE))
|
|
;
|
|
|
|
writeb(c, UART_BASE + UART_TX);
|
|
}
|