From 440cd59182a962b7f987d990db6d43a6026877ba Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tk@the-tk.com>
Date: Tue, 28 Mar 2017 21:53:36 +0100
Subject: hid mouse pointer jiggler

---
 usb/descriptors.h | 80 ++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 61 insertions(+), 19 deletions(-)

(limited to 'usb/descriptors.h')

diff --git a/usb/descriptors.h b/usb/descriptors.h
index f60ed86..b1b143d 100644
--- a/usb/descriptors.h
+++ b/usb/descriptors.h
@@ -1,23 +1,27 @@
 #ifndef USB_DESCRIPTORS_H
 #define USB_DESCRIPTORS_H
 
+#include "hid.h"
+
 /*
  * TODO: Move into a source file and use extern so there's only ever one copy
  * LTO should take care of the rest.
  */
 
+#define U16LE(d) ((d) & 0xff), (((uint16_t)(d) >> 8) & 0xff)
+
 /* Device descriptor */
 unsigned char ds_dev[] = {
 	18, // Length
 	1, // Descriptor type
-	0x00, 0x02, // USB Release
-	0xff, // Device class
+	U16LE(0x0200), // USB Release
+	0x00, // Device class
 	0x00, // Device sub class
 	0x00, // Device protocol
 	64, // Max packet size
-	0xc0, 0x16, // VID
-	0xdc, 0x05, // PID
-	0x01, 0x00, // Device relase
+	U16LE(0x16c0), // VID
+	U16LE(0x05dc), // PID
+	U16LE(0x0001), // Device relase
 	1, // Manufacturer string
 	0, // Product string
 	0, // Serial number string
@@ -25,11 +29,12 @@ unsigned char ds_dev[] = {
 };
 
 /* Configuration descriptor */
+#define DS_CONF_SIZE 34
 unsigned char ds_conf[] = {
 	/* Configuration */
 	9, // Length
 	2, // Descriptor type
-	0x22, 0x00, // Total length
+	U16LE(DS_CONF_SIZE), // Total length
 	1, // Number of interfaces
 	1, // Configuration value
 	0, // Configuration string
@@ -50,20 +55,54 @@ unsigned char ds_conf[] = {
 	/* HID */
 	9, // Length
 	33, // Descriptor type
-	0x11, 0x01, // HID Class spec version
+	U16LE(0x0111), // HID Class spec version
 	0, // Country code
 	1, // Number of descriptors
 	34, // Descriptor type
-	0x34, 0x00, // Descriptor length
+	U16LE(52), // Descriptor length
 
 	/* Endpoint */
 	7, // Length
 	5, // Descriptor type
 	0x81, // Endpoint address (D000NNNN, D - Direction (0 OUT, 1 IN), N - Endpoint No.)
 	0x03, // Attributes (00UUSSTT, U - Usage type, S - Synch type, T - Transfer type)
-	0x08, 0x00, // Max packet size
+	U16LE(64), // Max packet size
 	64, // Interval (1ms Frames)
 };
+_Static_assert(sizeof ds_conf == DS_CONF_SIZE, "sizeof ds_conf != DS_CONF_SIZE");
+
+/* HID Report descriptor */
+#define DS_HIDREP_SIZE 52
+unsigned char ds_hidrep[] = {
+	HR_USAGE_PAGE(1), HR_GENERIC_DESKTOP,
+	HR_USAGE(1), HR_MOUSE,
+	HR_COLLECTION(1), HR_APPLICATION,
+		HR_USAGE(1), HR_POINTER,
+		HR_COLLECTION(1), HR_PHYSICAL,
+			HR_USAGE_PAGE(1), HR_BUTTON,
+			HR_USAGE_MINIMUM(1), 1,
+			HR_USAGE_MAXIMUM(1), 5,
+			HR_LOGICAL_MINIMUM(1), 0,
+			HR_LOGICAL_MAXIMUM(1), 1,
+			HR_REPORT_COUNT(1), 5,
+			HR_REPORT_SIZE(1), 1,
+			HR_INPUT(1), HR_DATA | HR_VARIABLE | HR_ABSOLUTE | HR_BIT_FIELD,
+			HR_REPORT_COUNT(1), 1,
+			HR_REPORT_SIZE(1), 3,
+			HR_INPUT(1), HR_CONSTANT | HR_ARRAY | HR_ABSOLUTE | HR_BIT_FIELD,
+			HR_USAGE_PAGE(1), HR_GENERIC_DESKTOP,
+			HR_USAGE(1), HR_X,
+			HR_USAGE(1), HR_Y,
+			HR_USAGE(1), HR_WHEEL,
+			HR_LOGICAL_MINIMUM(1), -127,
+			HR_LOGICAL_MAXIMUM(1), 127,
+			HR_REPORT_SIZE(1), 8,
+			HR_REPORT_COUNT(1), 3,
+			HR_INPUT(1), HR_DATA | HR_VARIABLE | HR_RELATIVE | HR_BIT_FIELD,
+		HR_END_COLLECTION(0),
+	HR_END_COLLECTION(0),
+};
+_Static_assert(sizeof ds_hidrep == DS_HIDREP_SIZE, "sizeof ds_hidrep != DS_HIDREP_SIZE");
 
 /* Language descriptor */
 unsigned char ds_lang[] = {
@@ -71,21 +110,24 @@ unsigned char ds_lang[] = {
 	3, // Descriptor type
 	0x09, 0x04 // Language ID
 };
+_Static_assert(sizeof ds_lang == 4, "sizeof ds_lang != 4");
 
 /* String descriptor 1 */
+#define DS_STR1_SIZE 22
 unsigned char ds_str1[] = {
 	22, // Length
 	3, // Descriptor type
-	0x74, 0x00, // t
-	0x68, 0x00, // h
-	0x65, 0x00, // e
-	0x2d, 0x00, // -
-	0x74, 0x00, // t
-	0x6b, 0x00, // k
-	0x2e, 0x00, // .
-	0x63, 0x00, // c
-	0x6f, 0x00, // o
-	0x6d, 0x00, // m
+	U16LE(0x74), // t
+	U16LE(0x68), // h
+	U16LE(0x65), // e
+	U16LE(0x2d), // -
+	U16LE(0x74), // t
+	U16LE(0x6b), // k
+	U16LE(0x2e), // .
+	U16LE(0x63), // c
+	U16LE(0x6f), // o
+	U16LE(0x6d), // m
 };
+_Static_assert(sizeof ds_str1 == DS_STR1_SIZE, "sizeof ds_str1 != DS_STR1_SIZE");
 
 #endif /* USB_DESCRIPTORS_H */
-- 
cgit v1.2.3-54-g00ecf