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Added debug to catch initialisation failures

This commit is contained in:
Michael Brown 2006-09-01 00:19:09 +00:00
parent 78dd963c1f
commit 66dcd22f61
1 changed files with 18 additions and 6 deletions
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24
src/core/serial.c
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@ -165,23 +165,35 @@ static void serial_init ( void ) {
*/
uart_writeb(0x80 | lcs, UART_BASE + UART_LCR);
uart_writeb(0xaa, UART_BASE + UART_DLL);
if (uart_readb(UART_BASE + UART_DLL) != 0xaa)
if (uart_readb(UART_BASE + UART_DLL) != 0xaa) {
DBG ( "Serial port %#x UART_DLL failed\n", UART_BASE );
goto out;
}
uart_writeb(0x55, UART_BASE + UART_DLL);
if (uart_readb(UART_BASE + UART_DLL) != 0x55)
if (uart_readb(UART_BASE + UART_DLL) != 0x55) {
DBG ( "Serial port %#x UART_DLL failed\n", UART_BASE );
goto out;
}
uart_writeb(divisor & 0xff, UART_BASE + UART_DLL);
if (uart_readb(UART_BASE + UART_DLL) != (divisor & 0xff))
if (uart_readb(UART_BASE + UART_DLL) != (divisor & 0xff)) {
DBG ( "Serial port %#x UART_DLL failed\n", UART_BASE );
goto out;
}
uart_writeb(0xaa, UART_BASE + UART_DLM);
if (uart_readb(UART_BASE + UART_DLM) != 0xaa)
if (uart_readb(UART_BASE + UART_DLM) != 0xaa) {
DBG ( "Serial port %#x UART_DLM failed\n", UART_BASE );
goto out;
}
uart_writeb(0x55, UART_BASE + UART_DLM);
if (uart_readb(UART_BASE + UART_DLM) != 0x55)
if (uart_readb(UART_BASE + UART_DLM) != 0x55) {
DBG ( "Serial port %#x UART_DLM failed\n", UART_BASE );
goto out;
}
uart_writeb((divisor >> 8) & 0xff, UART_BASE + UART_DLM);
if (uart_readb(UART_BASE + UART_DLM) != ((divisor >> 8) & 0xff))
if (uart_readb(UART_BASE + UART_DLM) != ((divisor >> 8) & 0xff)) {
DBG ( "Serial port %#x UART_DLM failed\n", UART_BASE );
goto out;
}
uart_writeb(lcs, UART_BASE + UART_LCR);
/* disable interrupts */