diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2021-04-19 15:58:21 +0200 |
|---|---|---|
| committer | Angel Pons <th3fanbus@gmail.com> | 2021-05-20 16:04:05 +0000 |
| commit | dfb29fd701a0ed9d7c39c2e6e31bb532025b92db (patch) | |
| tree | 91eaa61fb643daae5d0d28c61dbd57b3a8c08943 /src | |
| parent | 9ffb57c6781676d5d8f54e3dba59b01a60c53c2e (diff) | |
sb/intel/lynxpoint: Add pch_iobp_exec() function
Taken from Broadwell. A follow-up will make Broadwell use the IOBP code
from Lynx Point.
Change-Id: Iacc90930ad4c34777c8f1af8b69c060c51a123b5
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52514
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/southbridge/intel/lynxpoint/iobp.c | 28 | ||||
| -rw-r--r-- | src/southbridge/intel/lynxpoint/iobp.h | 1 | ||||
| -rw-r--r-- | src/southbridge/intel/lynxpoint/pch.h | 2 |
3 files changed, 31 insertions, 0 deletions
diff --git a/src/southbridge/intel/lynxpoint/iobp.c b/src/southbridge/intel/lynxpoint/iobp.c index ad2527f00b..90cc075780 100644 --- a/src/southbridge/intel/lynxpoint/iobp.c +++ b/src/southbridge/intel/lynxpoint/iobp.c @@ -109,3 +109,31 @@ void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue) pch_iobp_write(address, data); } + +void pch_iobp_exec(u32 addr, u16 op_code, u8 route_id, u32 *data, u8 *resp) +{ + if (!data || !resp) + return; + + *resp = -1; + if (!iobp_poll()) + return; + + /* RCBA2330[31:0] = Address */ + RCBA32(IOBPIRI) = addr; + /* RCBA2338[15:8] = opcode */ + RCBA16(IOBPS) = (RCBA16(IOBPS) & 0x00ff) | op_code; + /* RCBA233A[15:8] = 0xf0 RCBA233A[7:0] = Route ID */ + RCBA16(IOBPU) = IOBPU_MAGIC | route_id; + + if (op_code == IOBP_PCICFG_WRITE) + RCBA32(IOBPD) = *data; + /* Set RCBA2338[0] to trigger IOBP transaction*/ + RCBA16(IOBPS) = RCBA16(IOBPS) | 0x1; + + if (!iobp_poll()) + return; + + *resp = (RCBA16(IOBPS) & IOBPS_TX_MASK) >> 1; + *data = RCBA32(IOBPD); +} diff --git a/src/southbridge/intel/lynxpoint/iobp.h b/src/southbridge/intel/lynxpoint/iobp.h index c8669bafd5..458e6be977 100644 --- a/src/southbridge/intel/lynxpoint/iobp.h +++ b/src/southbridge/intel/lynxpoint/iobp.h @@ -8,5 +8,6 @@ u32 pch_iobp_read(u32 address); void pch_iobp_write(u32 address, u32 data); void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue); +void pch_iobp_exec(u32 addr, u16 op_dcode, u8 route_id, u32 *data, u8 *resp); #endif diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h index c095298942..7b09d54f18 100644 --- a/src/southbridge/intel/lynxpoint/pch.h +++ b/src/southbridge/intel/lynxpoint/pch.h @@ -460,6 +460,8 @@ void mainboard_config_rcba(void); #define IOBPS_WRITE 0x0700 #define IOBPU 0x233a #define IOBPU_MAGIC 0xf000 +#define IOBP_PCICFG_READ 0x0400 +#define IOBP_PCICFG_WRITE 0x0500 #define D31IP 0x3100 /* 32bit */ #define D31IP_TTIP 24 /* Thermal Throttle Pin */ |