Change in coreboot[master]: soc/intel/common: Add IOE SBI access for TCSS functions

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/63128 )

Change subject: soc/intel/common: Add IOE SBI access for TCSS functions
......................................................................

soc/intel/common: Add IOE SBI access for TCSS functions

Meteor Lake has the IOE Die for TCSS. This change adds IOE SBI access
for TCSS pad configuration and Thunderbolt authentication.

BUG=b:213574324
TEST=Build platforms coreboot images successfully.

Change-Id: I324242a018fb47207dd426fc8acd103f677d5cab
Signed-off-by: John Zhao 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63128
Tested-by: build bot (Jenkins) 
Reviewed-by: Eric Lai 
Reviewed-by: Subrata Banik 
---
M src/soc/intel/common/block/include/intelblocks/tcss.h
M src/soc/intel/common/block/tcss/tcss.c
2 files changed, 20 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Subrata Banik: Looks good to me, approved
  Eric Lai: Looks good to me, but someone else must approve

diff --git a/src/soc/intel/common/block/include/intelblocks/tcss.h b/src/soc/intel/common/block/include/intelblocks/tcss.h
index 5209858..12400d8 100644
--- a/src/soc/intel/common/block/include/intelblocks/tcss.h
+++ b/src/soc/intel/common/block/include/intelblocks/tcss.h
@@ -146,6 +146,7 @@

/* Method to configure pads */
 void tcss_configure_aux_bias_pads_regbar(const struct typec_aux_bias_pads *pads);
+void ioe_tcss_configure_aux_bias_pads_sbi(const struct typec_aux_bias_pads *pads);

/*
  * 1) Initialize TCSS muxes to disconnected state
@@ -163,5 +164,6 @@

/* Method to validate the Thunderbolt authentication */
 bool tcss_valid_tbt_auth(void);
+bool ioe_tcss_valid_tbt_auth(void);

#endif /* _TCSS_H_ */
diff --git a/src/soc/intel/common/block/tcss/tcss.c b/src/soc/intel/common/block/tcss/tcss.c
index f1a3584..18fff20 100644
--- a/src/soc/intel/common/block/tcss/tcss.c
+++ b/src/soc/intel/common/block/tcss/tcss.c
@@ -368,6 +368,19 @@
    }
 }

+void ioe_tcss_configure_aux_bias_pads_sbi(
+	const struct typec_aux_bias_pads *pads)
+{
+	for (size_t i = 0; i < MAX_TYPE_C_PORTS; i++) {
+		if (pads[i].pad_auxn_dc && pads[i].pad_auxp_dc) {
+			ioe_p2sb_sbi_write(PID_IOM, IOM_AUX_BIAS_CTRL_PULLUP_OFFSET(i),
+				calc_bias_ctrl_reg_value(pads[i].pad_auxp_dc));
+			ioe_p2sb_sbi_write(PID_IOM, IOM_AUX_BIAS_CTRL_PULLDOWN_OFFSET(i),
+				calc_bias_ctrl_reg_value(pads[i].pad_auxn_dc));
+		}
+	}
+}
+
 const struct tcss_port_map *tcss_get_port_info(size_t *num_ports)
 {
    static struct tcss_port_map port_map[MAX_TYPE_C_PORTS];
@@ -424,3 +437,8 @@
 {
    return REGBAR32(PID_IOM, IOM_CSME_IMR_TBT_STATUS) & TBT_VALID_AUTHENTICATION;
 }
+
+bool ioe_tcss_valid_tbt_auth(void)
+{
+	return ioe_p2sb_sbi_read(PID_IOM, IOM_CSME_IMR_TBT_STATUS) & TBT_VALID_AUTHENTICATION;
+}