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authorMario Scheithauer <mario.scheithauer@siemens.com>2017-05-15 17:24:56 +0200
committerWerner Zeh <werner.zeh@siemens.com>2017-05-17 21:11:03 +0200
commit9e9cf270c4cbef24fb5127056b2eef4106d358ea (patch)
treea1c77f606c5e27c70912477a495fc30b9743cc34 /src/soc/intel
parentc5eab98e78878b25e01f374d63ab161555447c41 (diff)
soc/intel/apollolake: Enable decoding for ComA and ComB on LPC
If there is an external 8250 UART, one needs to enable the appropriate address ranges before console_init() is called so that the init sequence can reach the external UART. Furthermore FSPM needs different settings for an external UART port. For this, the function fill_console_params() has to be adapted. Change-Id: I62c7d0b54edd18acf793849aef352afbcaeb68b9 Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com> Reviewed-on: https://review.coreboot.org/19693 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel')
-rw-r--r--src/soc/intel/apollolake/include/soc/lpc.h5
-rw-r--r--src/soc/intel/apollolake/romstage.c41
2 files changed, 37 insertions, 9 deletions
diff --git a/src/soc/intel/apollolake/include/soc/lpc.h b/src/soc/intel/apollolake/include/soc/lpc.h
index 7e3d74aaf6..da918a16b4 100644
--- a/src/soc/intel/apollolake/include/soc/lpc.h
+++ b/src/soc/intel/apollolake/include/soc/lpc.h
@@ -29,8 +29,11 @@
* IO decode enable macros are in the format IO_<peripheral>_<IO port>.
* For example, to open ports 0x60, 0x64 for the keyboard controller,
* use IOE_KBC_60_64 macro. For IOE_ macros that do not specify a port range,
- * the port range is selectable via the IO decodes register (not referenced).
+ * the port range is selectable via the IO decodes register.
*/
+#define REG_IO_DECODE 0x80
+#define IOD_COMA_RANGE (0 << 0) /* 0x3F8 - 0x3FF COMA*/
+#define IOD_COMB_RANGE (1 << 4) /* 0x2F8 - 0x2FF COMB*/
#define REG_IO_ENABLES 0x82
#define IOE_EC_4E_4F (1 << 13)
#define IOE_SUPERIO_2E_2F (1 << 12)
diff --git a/src/soc/intel/apollolake/romstage.c b/src/soc/intel/apollolake/romstage.c
index 98c70156da..39d3989117 100644
--- a/src/soc/intel/apollolake/romstage.c
+++ b/src/soc/intel/apollolake/romstage.c
@@ -35,6 +35,7 @@
#include <soc/cpu.h>
#include <soc/intel/common/mrc_cache.h>
#include <soc/iomap.h>
+#include <soc/lpc.h>
#include <soc/systemagent.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
@@ -85,6 +86,18 @@ static void soc_early_romstage_init(void)
/* Enable decoding for HPET. Needed for FSP global pointer storage */
pci_write_config8(PCH_DEV_P2SB, P2SB_HPTC, P2SB_HPTC_ADDRESS_SELECT_0 |
P2SB_HPTC_ADDRESS_ENABLE);
+
+ if (IS_ENABLED(CONFIG_DRIVERS_UART_8250IO)) {
+ /*
+ * I/O Decode Range Register for LPC
+ * ComA Range 3F8h-3FFh [2:0]
+ * ComB Range 2F8h-2FFh [6:4]
+ */
+ pci_write_config16(PCH_DEV_LPC, REG_IO_DECODE,
+ IOD_COMA_RANGE | IOD_COMB_RANGE);
+ /* Enable ComA and ComB Port */
+ lpc_enable_fixed_io_ranges(IOE_COMA_EN | IOE_COMB_EN);
+ }
}
static void disable_watchdog(void)
@@ -245,14 +258,26 @@ asmlinkage void car_stage_entry(void)
static void fill_console_params(FSPM_UPD *mupd)
{
if (IS_ENABLED(CONFIG_CONSOLE_SERIAL)) {
- mupd->FspmConfig.SerialDebugPortDevice =
- CONFIG_UART_FOR_CONSOLE;
- /* use MMIO port type */
- mupd->FspmConfig.SerialDebugPortType = 2;
- /* use 4 byte register stride */
- mupd->FspmConfig.SerialDebugPortStrideSize = 2;
- /* used only for port type set to external */
- mupd->FspmConfig.SerialDebugPortAddress = 0;
+ if (IS_ENABLED(CONFIG_SOC_UART_DEBUG)) {
+ mupd->FspmConfig.SerialDebugPortDevice =
+ CONFIG_UART_FOR_CONSOLE;
+ /* use MMIO port type */
+ mupd->FspmConfig.SerialDebugPortType = 2;
+ /* use 4 byte register stride */
+ mupd->FspmConfig.SerialDebugPortStrideSize = 2;
+ /* used only for port type set to external */
+ mupd->FspmConfig.SerialDebugPortAddress = 0;
+ } else if (IS_ENABLED(CONFIG_DRIVERS_UART_8250IO)) {
+ /* use external UART for debug */
+ mupd->FspmConfig.SerialDebugPortDevice = 3;
+ /* use I/O port type */
+ mupd->FspmConfig.SerialDebugPortType = 1;
+ /* use 1 byte register stride */
+ mupd->FspmConfig.SerialDebugPortStrideSize = 0;
+ /* used only for port type set to external */
+ mupd->FspmConfig.SerialDebugPortAddress =
+ CONFIG_TTYS0_BASE;
+ }
} else {
mupd->FspmConfig.SerialDebugPortType = 0;
}