Change in coreboot[master]: soc/intel/common: Configure TCSS access through IOE P2SB

[John Zhao (Code Review)]

John Zhao has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/62723 )

Change subject: soc/intel/common: Configure TCSS access through IOE P2SB
......................................................................

soc/intel/common: Configure TCSS access through IOE P2SB

This change abstracts the TCSS access through IOE P2SB on Meteor Lake.

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

Change-Id: I3302aabfb5f540c41da6359f11376b4202c6310b
Signed-off-by: John 
---
M src/soc/intel/common/block/tcss/tcss.c
1 file changed, 21 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/23/62723/1

diff --git a/src/soc/intel/common/block/tcss/tcss.c b/src/soc/intel/common/block/tcss/tcss.c
index 2531ac3..cace74f 100644
--- a/src/soc/intel/common/block/tcss/tcss.c
+++ b/src/soc/intel/common/block/tcss/tcss.c
@@ -368,11 +368,28 @@
    }
 }

+static 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));
+		}
+	}
+}
+
 static void tcss_configure_aux_bias_pads(
    const struct typec_aux_bias_pads *pads)
 {
    if (CONFIG(SOC_INTEL_COMMON_BLOCK_TCSS_REG_ACCESS_REGBAR))
    	tcss_configure_aux_bias_pads_regbar(pads);
+	else if (CONFIG(SOC_INTEL_COMMON_BLOCK_TCSS_REG_ACCESS_SBI)) {
+		if (CONFIG(SOC_INTEL_COMMON_BLOCK_IOE_P2SB))
+			ioe_tcss_configure_aux_bias_pads_sbi(pads);
+	}
    else
    	printk(BIOS_ERR, "%s: Error: No TCSS configuration method is selected!\n",
    				__func__);
@@ -433,6 +450,10 @@
 {
    if (CONFIG(SOC_INTEL_COMMON_BLOCK_TCSS_REG_ACCESS_REGBAR)) {
    	return REGBAR32(PID_IOM, IOM_CSME_IMR_TBT_STATUS) & TBT_VALID_AUTHENTICATION;
+	} else if (CONFIG(SOC_INTEL_COMMON_BLOCK_TCSS_REG_ACCESS_SBI)) {
+		if (CONFIG(SOC_INTEL_COMMON_BLOCK_IOE_P2SB))
+			return (ioe_p2sb_sbi_read(PID_IOM, IOM_CSME_IMR_TBT_STATUS) &
+							TBT_VALID_AUTHENTICATION);
    } else {
    	printk(BIOS_ERR, "%s: Error: No validation for Thunderbolt authentication!\n",
    				__func__);