stm32: usb_hid_touchpad: add 'device certification status' report

'device certification status' is expected by Precision Touchpad driver.

BRANCH=none
BUG=b:70482333
TEST=manual
Signed-off-by: Wei-Han Chen <stimim@chromium.org>

Change-Id: Ie71208e309378bbd604160f68a8313331a6d5308
Reviewed-on: https://chromium-review.googlesource.com/1188174
Commit-Ready: Wei-Han Chen <stimim@chromium.org>
Tested-by: Wei-Han Chen <stimim@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/chip/stm32/usb_hid_touchpad.c b/chip/stm32/usb_hid_touchpad.c
index 1d835926bc..1c301a04a1 100644
--- a/chip/stm32/usb_hid_touchpad.c
+++ b/chip/stm32/usb_hid_touchpad.c
@@ -175,9 +175,60 @@ static const uint8_t report_desc[] = {
 	0x95, 0x01,                    /*   Report Count (2) */
 	0xB1, 0x02,                    /*   Feature (Data,Var,Abs) */
 
+	/* Page 0xFF, usage 0xC5 is device certificate. */
+	0x06, 0x00, 0xFF,              /*   Usage Page (Vendor Defined) */
+	0x85, REPORT_ID_DEVICE_CERT,   /*   Report ID (Device Certification) */
+	0x09, 0xC5,                    /*   Usage (Vendor Usage 0xC5) */
+	0x15, 0x00,                    /*   Logical Minimum (0) */
+	0x26, 0xFF, 0x00,              /*   Logical Maximum (255) */
+	0x75, 0x08,                    /*   Report Size (8) */
+	0x96, 0x00, 0x01,              /*   Report Count (256) */
+	0xB1, 0x02,                    /*   Feature (Data,Var,Abs) */
+
 	0xC0,                          /* End Collection */
 };
 
+/* A 256-byte default blob for the 'device certification status' feature report.
+ *
+ * TODO(b/113248108): do we need a real certification?
+ */
+static const uint8_t device_cert_response[] = {
+	REPORT_ID_DEVICE_CERT,
+
+	0xFC, 0x28, 0xFE, 0x84, 0x40, 0xCB, 0x9A, 0x87,
+	0x0D, 0xBE, 0x57, 0x3C, 0xB6, 0x70, 0x09, 0x88,
+	0x07, 0x97, 0x2D, 0x2B, 0xE3, 0x38, 0x34, 0xB6,
+	0x6C, 0xED, 0xB0, 0xF7, 0xE5, 0x9C, 0xF6, 0xC2,
+	0x2E, 0x84, 0x1B, 0xE8, 0xB4, 0x51, 0x78, 0x43,
+	0x1F, 0x28, 0x4B, 0x7C, 0x2D, 0x53, 0xAF, 0xFC,
+	0x47, 0x70, 0x1B, 0x59, 0x6F, 0x74, 0x43, 0xC4,
+	0xF3, 0x47, 0x18, 0x53, 0x1A, 0xA2, 0xA1, 0x71,
+	0xC7, 0x95, 0x0E, 0x31, 0x55, 0x21, 0xD3, 0xB5,
+	0x1E, 0xE9, 0x0C, 0xBA, 0xEC, 0xB8, 0x89, 0x19,
+	0x3E, 0xB3, 0xAF, 0x75, 0x81, 0x9D, 0x53, 0xB9,
+	0x41, 0x57, 0xF4, 0x6D, 0x39, 0x25, 0x29, 0x7C,
+	0x87, 0xD9, 0xB4, 0x98, 0x45, 0x7D, 0xA7, 0x26,
+	0x9C, 0x65, 0x3B, 0x85, 0x68, 0x89, 0xD7, 0x3B,
+	0xBD, 0xFF, 0x14, 0x67, 0xF2, 0x2B, 0xF0, 0x2A,
+	0x41, 0x54, 0xF0, 0xFD, 0x2C, 0x66, 0x7C, 0xF8,
+	0xC0, 0x8F, 0x33, 0x13, 0x03, 0xF1, 0xD3, 0xC1,
+	0x0B, 0x89, 0xD9, 0x1B, 0x62, 0xCD, 0x51, 0xB7,
+	0x80, 0xB8, 0xAF, 0x3A, 0x10, 0xC1, 0x8A, 0x5B,
+	0xE8, 0x8A, 0x56, 0xF0, 0x8C, 0xAA, 0xFA, 0x35,
+	0xE9, 0x42, 0xC4, 0xD8, 0x55, 0xC3, 0x38, 0xCC,
+	0x2B, 0x53, 0x5C, 0x69, 0x52, 0xD5, 0xC8, 0x73,
+	0x02, 0x38, 0x7C, 0x73, 0xB6, 0x41, 0xE7, 0xFF,
+	0x05, 0xD8, 0x2B, 0x79, 0x9A, 0xE2, 0x34, 0x60,
+	0x8F, 0xA3, 0x32, 0x1F, 0x09, 0x78, 0x62, 0xBC,
+	0x80, 0xE3, 0x0F, 0xBD, 0x65, 0x20, 0x08, 0x13,
+	0xC1, 0xE2, 0xEE, 0x53, 0x2D, 0x86, 0x7E, 0xA7,
+	0x5A, 0xC5, 0xD3, 0x7D, 0x98, 0xBE, 0x31, 0x48,
+	0x1F, 0xFB, 0xDA, 0xAF, 0xA2, 0xA8, 0x6A, 0x89,
+	0xD6, 0xBF, 0xF2, 0xD3, 0x32, 0x2A, 0x9A, 0xE4,
+	0xCF, 0x17, 0xB7, 0xB8, 0xF4, 0xE1, 0x33, 0x08,
+	0x24, 0x8B, 0xC4, 0x43, 0xA5, 0xE5, 0x24, 0xC2,
+};
+
 /* Device capabilities feature report. */
 static const uint8_t device_caps_response[] = {
 	REPORT_ID_DEVICE_CAPS,
@@ -350,6 +401,10 @@ static int get_report(uint8_t report_id, uint8_t report_type,
 		*buffer_ptr = device_caps_response;
 		*buffer_size = MIN(sizeof(device_caps_response), *buffer_size);
 		return 0;
+	case REPORT_ID_DEVICE_CERT:
+		*buffer_ptr = device_cert_response;
+		*buffer_size = MIN(sizeof(device_cert_response), *buffer_size);
+		return 0;
 	}
 	return -1;
 }