diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/apollolake/include/soc/lpc.h | 5 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/romstage.c | 41 |
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; } |