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>
diff --git a/src/southbridge/intel/lynxpoint/iobp.c b/src/southbridge/intel/lynxpoint/iobp.c
index ad2527f..90cc075 100644
--- a/src/southbridge/intel/lynxpoint/iobp.c
+++ b/src/southbridge/intel/lynxpoint/iobp.c
@@ -109,3 +109,31 @@
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 c8669ba..458e6be 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 c095298..7b09d54 100644
--- a/src/southbridge/intel/lynxpoint/pch.h
+++ b/src/southbridge/intel/lynxpoint/pch.h
@@ -460,6 +460,8 @@
#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 */