diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-05-13 12:57:26 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-05-17 14:56:06 +0200 |
| commit | 48e9eb89fa52eeb193f7e687bbb7f4e152235b79 (patch) | |
| tree | e4c901e5f8d89136b8838edbeaaae87b700c17db /payloads/libpayload/drivers/serial.c | |
| parent | 0890a825f3870f135447055c40b342bc6e3b0da7 (diff) | |
libpayload: Fix to properly disable serial console
With coreboot builds with serial console disabled, there is no
CB_TAG_SERIAL entry in coreboot tables. We ended up with
lib_sysinfo.serial == NULL and serial_hardware_is_present == 1.
Change-Id: I9a2fc0b55bf77769f2f2bfbb2b5476bee8083f7d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5723
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'payloads/libpayload/drivers/serial.c')
| -rw-r--r-- | payloads/libpayload/drivers/serial.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/payloads/libpayload/drivers/serial.c b/payloads/libpayload/drivers/serial.c index a4cd6d013a..0d2964b771 100644 --- a/payloads/libpayload/drivers/serial.c +++ b/payloads/libpayload/drivers/serial.c @@ -34,7 +34,7 @@ #define IOBASE lib_sysinfo.serial->baseaddr #define MEMBASE (phys_to_virt(IOBASE)) -static int serial_hardware_is_present = 1; +static int serial_hardware_is_present = 0; static int serial_is_mem_mapped = 0; static uint8_t serial_read_reg(int offset) @@ -105,7 +105,8 @@ void serial_init(void) #ifdef CONFIG_IO_ADDRESS_SPACE if ((inb(IOBASE + 0x05) == 0xFF) && (inb(IOBASE + 0x06) == 0xFF)) { - serial_hardware_is_present = 0; + printf("IO space mapped serial not present."); + return; } #else printf("IO space mapped serial not supported."); @@ -118,12 +119,14 @@ void serial_init(void) #endif console_add_input_driver(&consin); console_add_output_driver(&consout); + serial_hardware_is_present = 1; } void serial_putchar(unsigned int c) { - if (serial_hardware_is_present) - while ((serial_read_reg(0x05) & 0x20) == 0) ; + if (!serial_hardware_is_present) + return; + while ((serial_read_reg(0x05) & 0x20) == 0) ; serial_write_reg(c, 0x00); } |