diff options
| author | Wim Vervoorn <wvervoorn@eltan.com> | 2020-02-03 15:32:54 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-03-18 16:27:01 +0000 |
| commit | 5f2adfe1a30627b0a416418a0cac59b9104bfbef (patch) | |
| tree | 240eece566616dcd66e390b1674e4018aede5205 /src/soc/intel/common | |
| parent | 53a9e418913df9becc5a42a8e4e33466db528e1b (diff) | |
soc/intel/skylake: Control fixed IO decode from devicetree
The current implementation doesn't allow custom values for the LPC IO
decodes and IO enables.
Add the lpc_ioe and lpc_iod values. If they are not zero, they will be
used instead of the current handling for COMA and COMB.
BUG=N/A
TEST=tested on facebook monolith
Change-Id: Iad7bb0e44739e8d656a542c79af7f98a4e9bde69
Signed-off-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38748
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/common')
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/lpc_lib.h | 2 | ||||
| -rw-r--r-- | src/soc/intel/common/block/lpc/lpc_lib.c | 11 |
2 files changed, 13 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/lpc_lib.h b/src/soc/intel/common/block/include/intelblocks/lpc_lib.h index cf6d8e9bdc..25a7370f83 100644 --- a/src/soc/intel/common/block/include/intelblocks/lpc_lib.h +++ b/src/soc/intel/common/block/include/intelblocks/lpc_lib.h @@ -72,6 +72,8 @@ struct lpc_mmio_range { uint16_t lpc_enable_fixed_io_ranges(uint16_t io_enables); /* Return the current decode settings */ uint16_t lpc_get_fixed_io_decode(void); +/* Set the current decode ranges */ +uint16_t lpc_set_fixed_io_ranges(uint16_t io_ranges, uint16_t mask); /* Open a generic IO window to the LPC bus. Four windows are available. */ void lpc_open_pmio_window(uint16_t base, uint16_t size); /* Close all generic IO windows to the LPC bus. */ diff --git a/src/soc/intel/common/block/lpc/lpc_lib.c b/src/soc/intel/common/block/lpc/lpc_lib.c index 5b30a8121b..8edbd2ed7c 100644 --- a/src/soc/intel/common/block/lpc/lpc_lib.c +++ b/src/soc/intel/common/block/lpc/lpc_lib.c @@ -42,6 +42,17 @@ uint16_t lpc_get_fixed_io_decode(void) return pci_read_config16(PCH_DEV_LPC, LPC_IO_DECODE); } +uint16_t lpc_set_fixed_io_ranges(uint16_t io_ranges, uint16_t mask) +{ + uint16_t reg_io_ranges; + + reg_io_ranges = lpc_get_fixed_io_decode() & ~mask; + io_ranges |= reg_io_ranges & mask; + pci_write_config16(PCH_DEV_LPC, LPC_IO_DECODE, io_ranges); + + return io_ranges; +} + /* * Find the first unused IO window. * Returns -1 if not found, 0 for reg 0x84, 1 for reg 0x88 ... |