soc/apl: add options to override USB port config

Allows to override the PortUsb20Enable and PortUsb30Enable FSP options
(which are set to 1 by default) to enable/disable USB ports if the
usb_config_override flag is set to "1". Therefore, these changes will
not affect other boards with an Apollo Lake processor.

Change-Id: Ia94a2be1647f7743ef0c918ae3b34437a179261c
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38815
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

3 files changed, 47 insertions, 2 deletions

diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c
index 37fdfff90b6c..4eabf8a01226 100644
--- a/src/soc/intel/apollolake/chip.c
+++ b/src/soc/intel/apollolake/chip.c
@@ -558,11 +558,18 @@ static void parse_devicetree(FSP_S_CONFIG *silconfig)
 static void apl_fsp_silicon_init_params_cb(struct soc_intel_apollolake_config
 	*cfg, FSP_S_CONFIG *silconfig)
 {
-#if !CONFIG(SOC_INTEL_GLK) /* GLK FSP does not have these
-					 fields in FspsUpd.h yet */
+#if !CONFIG(SOC_INTEL_GLK) /* GLK FSP does not have these fields in FspsUpd.h yet */
 	uint8_t port;
 
 	for (port = 0; port < APOLLOLAKE_USB2_PORT_MAX; port++) {
+		if (cfg->usb_config_override) {
+			if (!cfg->usb2_port[port].enable)
+				continue;
+
+			silconfig->PortUsb20Enable[port] = 1;
+			silconfig->PortUs20bOverCurrentPin[port] = cfg->usb2_port[port].oc_pin;
+		}
+
 		if (cfg->usb2eye[port].Usb20PerPortTxPeHalf != 0)
 			silconfig->PortUsb20PerPortTxPeHalf[port] =
 				cfg->usb2eye[port].Usb20PerPortTxPeHalf;
@@ -591,6 +598,16 @@ static void apl_fsp_silicon_init_params_cb(struct soc_intel_apollolake_config
 			silconfig->PortUsb20HsNpreDrvSel[port] =
 				cfg->usb2eye[port].Usb20HsNpreDrvSel;
 	}
+
+	if (cfg->usb_config_override) {
+		for (port = 0; port < APOLLOLAKE_USB3_PORT_MAX; port++) {
+			if (!cfg->usb3_port[port].enable)
+				continue;
+
+			silconfig->PortUsb30Enable[port] = 1;
+			silconfig->PortUs30bOverCurrentPin[port] = cfg->usb3_port[port].oc_pin;
+		}
+	}
 #endif
 }
 
diff --git a/src/soc/intel/apollolake/chip.h b/src/soc/intel/apollolake/chip.h
index e5045d01b146..40cd39b46b32 100644
--- a/src/soc/intel/apollolake/chip.h
+++ b/src/soc/intel/apollolake/chip.h
@@ -136,6 +136,11 @@ struct soc_intel_apollolake_config {
 	/* USB2 eye diagram settings per port */
 	struct usb2_eye_per_port usb2eye[APOLLOLAKE_USB2_PORT_MAX];
 
+	/* Override USB port configuration */
+	uint8_t usb_config_override;
+	struct usb_port_config usb2_port[APOLLOLAKE_USB2_PORT_MAX];
+	struct usb_port_config usb3_port[APOLLOLAKE_USB3_PORT_MAX];
+
 	/* GPIO SD card detect pin */
 	unsigned int sdcard_cd_gpio;
 
diff --git a/src/soc/intel/apollolake/include/soc/usb.h b/src/soc/intel/apollolake/include/soc/usb.h
index 28cad37f5812..11dec48eb6ec 100644
--- a/src/soc/intel/apollolake/include/soc/usb.h
+++ b/src/soc/intel/apollolake/include/soc/usb.h
@@ -21,6 +21,12 @@
 #include <stdint.h>
 
 #define APOLLOLAKE_USB2_PORT_MAX 8
+#define APOLLOLAKE_USB3_PORT_MAX 6
+
+struct usb_port_config {
+	uint8_t enable;
+	uint8_t oc_pin;
+};
 
 struct usb2_eye_per_port {
 	uint8_t Usb20PerPortTxPeHalf;
@@ -33,4 +39,21 @@ struct usb2_eye_per_port {
 	uint8_t Usb20OverrideEn;
 };
 
+/* USB overcurrent pins definition */
+enum {
+	OC0     = 0,
+	OC1     = 1,
+	OC_SKIP = 2,
+};
+
+#define PORT_EN(pin) {   \
+	.enable = 1,     \
+	.oc_pin = (pin), \
+}
+
+#define PORT_DIS {         \
+	.enable = 0,       \
+	.oc_pin = OC_SKIP, \
+}
+
 #endif /* _SOC_APOLLOLAKE_USB_H_ */