From b85a87b7d6f9f12d5c71c32741c8af731ed6be7e Mon Sep 17 00:00:00 2001 From: Kyösti Mälkki Date: Mon, 29 Dec 2014 11:32:27 +0200 Subject: intel SMI handlers: Refactor GPI SMI/SCI routing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Move the GPI interrupt routing selection between SMI/SCI from mainboards to southbridge. There is speculation if this is all just legacy APM stuff that could be removed with a followup. Change-Id: Iab14cf347584513793f417febc47f0559e17f5a5 Signed-off-by: Kyösti Mälkki Signed-off-by: Nicolas Reinecke Reviewed-on: http://review.coreboot.org/7967 Tested-by: build bot (Jenkins) Reviewed-by: Alexander Couzens --- src/southbridge/intel/ibexpeak/lpc.c | 2 +- src/southbridge/intel/ibexpeak/pch.h | 6 +++++ src/southbridge/intel/ibexpeak/smihandler.c | 36 +++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+), 1 deletion(-) (limited to 'src/southbridge/intel/ibexpeak') diff --git a/src/southbridge/intel/ibexpeak/lpc.c b/src/southbridge/intel/ibexpeak/lpc.c index db73b0add8..9550a9e974 100644 --- a/src/southbridge/intel/ibexpeak/lpc.c +++ b/src/southbridge/intel/ibexpeak/lpc.c @@ -166,7 +166,7 @@ static void pch_gpi_routing(device_t dev) reg32 |= (config->gpi14_routing & 0x03) << 28; reg32 |= (config->gpi15_routing & 0x03) << 30; - pci_write_config32(dev, 0xb8, reg32); + pci_write_config32(dev, GPIO_ROUT, reg32); } static void pch_power_options(device_t dev) diff --git a/src/southbridge/intel/ibexpeak/pch.h b/src/southbridge/intel/ibexpeak/pch.h index 12e9345bf7..23eb6cd923 100644 --- a/src/southbridge/intel/ibexpeak/pch.h +++ b/src/southbridge/intel/ibexpeak/pch.h @@ -71,6 +71,7 @@ int pch_silicon_revision(void); int pch_silicon_type(void); int pch_silicon_supported(int type, int rev); void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue); +void gpi_route_interrupt(u8 gpi, u8 mode); #if CONFIG_ELOG void pch_log_state(void); #endif @@ -133,7 +134,12 @@ void southbridge_configure_default_intmap(void); #define BIOS_CNTL 0xDC #define GPIO_BASE 0x48 /* LPC GPIO Base Address Register */ #define GPIO_CNTL 0x4C /* LPC GPIO Control Register */ + #define GPIO_ROUT 0xb8 +#define GPI_DISABLE 0x00 +#define GPI_IS_SMI 0x01 +#define GPI_IS_SCI 0x02 +#define GPI_IS_NMI 0x03 #define PIRQA_ROUT 0x60 #define PIRQB_ROUT 0x61 diff --git a/src/southbridge/intel/ibexpeak/smihandler.c b/src/southbridge/intel/ibexpeak/smihandler.c index 019e6db276..bfe5f5d0af 100644 --- a/src/southbridge/intel/ibexpeak/smihandler.c +++ b/src/southbridge/intel/ibexpeak/smihandler.c @@ -75,6 +75,42 @@ void tseg_relocate(void **ptr) } #endif +static void alt_gpi_mask(u16 clr, u16 set) +{ + u16 alt_gp = inw(pmbase + ALT_GP_SMI_EN); + alt_gp &= ~clr; + alt_gp |= set; + outw(alt_gp, pmbase + ALT_GP_SMI_EN); +} + +static void gpe0_mask(u32 clr, u32 set) +{ + u32 gpe0 = inl(pmbase + GPE0_EN); + gpe0 &= ~clr; + gpe0 |= set; + outl(gpe0, pmbase + GPE0_EN); +} + +void gpi_route_interrupt(u8 gpi, u8 mode) +{ + u32 gpi_rout; + if (gpi >= 16) + return; + + alt_gpi_mask(1 << gpi, 0); + gpe0_mask(1 << (gpi+16), 0); + + gpi_rout = pci_read_config32(PCI_DEV(0, 0x1f, 0), GPIO_ROUT); + gpi_rout &= ~(3 << (2 * gpi)); + gpi_rout |= ((mode & 3) << (2 * gpi)); + pci_write_config32(PCI_DEV(0, 0x1f, 0), GPIO_ROUT, gpi_rout); + + if (mode == GPI_IS_SCI) + gpe0_mask(0, 1 << (gpi+16)); + else if (mode == GPI_IS_SMI) + alt_gpi_mask(0, 1 << gpi); +} + /** * @brief read and clear PM1_STS * @return PM1_STS register -- cgit v1.2.3