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authorKyösti Mälkki <kyosti.malkki@gmail.com>2014-02-17 19:37:52 +0200
committerKyösti Mälkki <kyosti.malkki@gmail.com>2014-03-04 15:22:08 +0100
commit3ee1668ab4fbf75b256ac8eef4273b1ea445c998 (patch)
tree59f35a43b85c5da6a0d9d38aba7f391971cbc980 /src/arch
parentc76b3d6cca4a6135e5a7d7f3c2d9aa5128ef23f0 (diff)
downloadcoreboot-3ee1668ab4fbf75b256ac8eef4273b1ea445c998.tar.xz
uart8250: Fix and unify baudrate divisor calculation
Divisor is a function of requested baudrate, platform-specific reference clock and amount of oversampling done on the UART reference. Calculate this parameter with divisor rounded to nearest integer. When building without option_table or when there is no entry for baud_rate, CONFIG_TTYS0_BAUD is used for default baudrate. For OxPCIe use of 4 MHz for reference was arbitrary giving correct divisor for 115200 but somewhat inaccurate for lower baudrates. Actual hardware is 62500000 with 16 times oversampling. FIXME: Field for baudrate in lb_tables is still incorrect. Change-Id: I68539738469af780fadd3392263dd9b3d5964d2d Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/5229 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/arch')
-rw-r--r--src/arch/x86/lib/romcc_console.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/arch/x86/lib/romcc_console.c b/src/arch/x86/lib/romcc_console.c
index db84f9e642..c5e688258b 100644
--- a/src/arch/x86/lib/romcc_console.c
+++ b/src/arch/x86/lib/romcc_console.c
@@ -32,6 +32,7 @@
#endif
#if CONFIG_CONSOLE_SERIAL8250
+#include "drivers/uart/util.c"
#include "lib/uart8250.c"
#endif
#if CONFIG_CONSOLE_NE2K