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| author | Michael Brown | 2006-09-01 02:19:09 +0200 |
|---|---|---|
| committer | Michael Brown | 2006-09-01 02:19:09 +0200 |
| commit | 66dcd22f6193aaaca7c734da9bf7ce206f2c1a63 (patch) | |
| tree | debb4d5cf703f0900ab14352fa95cc0ffc41666f /src/core/serial.c | |
| parent | Check to see if we've reached the end of the map before attempting to (diff) | |
| download | ipxe-66dcd22f6193aaaca7c734da9bf7ce206f2c1a63.tar.gz ipxe-66dcd22f6193aaaca7c734da9bf7ce206f2c1a63.tar.xz ipxe-66dcd22f6193aaaca7c734da9bf7ce206f2c1a63.zip | |
Added debug to catch initialisation failures
Diffstat (limited to 'src/core/serial.c')
| -rw-r--r-- | src/core/serial.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/core/serial.c b/src/core/serial.c index 94bb8d12..6383a48b 100644 --- a/src/core/serial.c +++ b/src/core/serial.c @@ -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 */ |