linux-kernel - [PATCH v4 1/2] platform/chrome: Update ChromeOS EC header for UCSI

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Message-Id: <20240409-public-ucsi-h-v4-1-e770735222a2@chromium.org>
Date: Tue, 09 Apr 2024 02:27:36 +0000
From: Pavan Holla <pholla@...omium.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Benson Leung <bleung@...omium.org>, Tzung-Bi Shih <tzungbi@...nel.org>, 
 Guenter Roeck <groeck@...omium.org>
Cc: linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org, 
 Abhishek Pandit-Subedi <abhishekpandit@...omium.org>, 
 chrome-platform@...ts.linux.dev, Pavan Holla <pholla@...omium.org>
Subject: [PATCH v4 1/2] platform/chrome: Update ChromeOS EC header for UCSI

Add EC host commands for reading and writing UCSI structures
in the EC. The corresponding kernel driver is cros-ec-ucsi.

Also update PD events supported by the EC.

Signed-off-by: Pavan Holla <pholla@...omium.org>
---
 include/linux/platform_data/cros_ec_commands.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
index ecc47d5fe239..c0f6d054a566 100644
--- a/include/linux/platform_data/cros_ec_commands.h
+++ b/include/linux/platform_data/cros_ec_commands.h
@@ -4933,6 +4933,8 @@ struct ec_response_pd_status {
 #define PD_EVENT_POWER_CHANGE      BIT(1)
 #define PD_EVENT_IDENTITY_RECEIVED BIT(2)
 #define PD_EVENT_DATA_SWAP         BIT(3)
+#define PD_EVENT_TYPEC             BIT(4)
+#define PD_EVENT_PPM               BIT(5)
 struct ec_response_host_event_status {
 	uint32_t status;      /* PD MCU host event status */
 } __ec_align4;
@@ -5994,6 +5996,24 @@ struct ec_response_typec_vdm_response {
 
 #undef VDO_MAX_SIZE
 
+/*
+ * Read/write interface for UCSI OPM <-> PPM communication.
+ */
+#define EC_CMD_UCSI_PPM_SET 0x0140
+
+/* The data size is stored in the host command protocol header. */
+struct ec_params_ucsi_ppm_set {
+	uint16_t offset;
+	uint8_t data[];
+} __ec_align2;
+
+#define EC_CMD_UCSI_PPM_GET 0x0141
+
+struct ec_params_ucsi_ppm_get {
+	uint16_t offset;
+	uint8_t size;
+} __ec_align2;
+
 /*****************************************************************************/
 /* The command range 0x200-0x2FF is reserved for Rotor. */
 

-- 
2.44.0.478.gd926399ef9-goog