+/*
+ * Cherry Cymotion keyboard have an invalid HID report descriptor,
+ * that needs fixing before we can parse it.
+ */
+static void usbhid_fixup_cymotion_descriptor(char *rdesc, int rsize)
+{
+ if (rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
+ printk(KERN_INFO "Fixing up Cherry Cymotion report descriptor\n");
+ rdesc[11] = rdesc[16] = 0xff;
+ rdesc[12] = rdesc[17] = 0x03;
+ }
+}
+
+
+/*
+ * Certain Logitech keyboards send in report #3 keys which are far
+ * above the logical maximum described in descriptor. This extends
+ * the original value of 0x28c of logical maximum to 0x104d
+ */
+static void usbhid_fixup_logitech_descriptor(unsigned char *rdesc, int rsize)
+{
+ if (rsize >= 90 && rdesc[83] == 0x26
+ && rdesc[84] == 0x8c
+ && rdesc[85] == 0x02) {
+ printk(KERN_INFO "Fixing up Logitech keyboard report descriptor\n");
+ rdesc[84] = rdesc[89] = 0x4d;
+ rdesc[85] = rdesc[90] = 0x10;
+ }
+}
+
+/* Petalynx Maxter Remote has maximum for consumer page set too low */
+static void usbhid_fixup_petalynx_descriptor(unsigned char *rdesc, int rsize)
+{
+ if (rsize >= 60 && rdesc[39] == 0x2a
+ && rdesc[40] == 0xf5
+ && rdesc[41] == 0x00
+ && rdesc[59] == 0x26
+ && rdesc[60] == 0xf9
+ && rdesc[61] == 0x00) {
+ printk(KERN_INFO "Fixing up Petalynx Maxter Remote report descriptor\n");
+ rdesc[60] = 0xfa;
+ rdesc[40] = 0xfa;
+ }
+}
+
+/*
+ * Some USB barcode readers from cypress have usage min and usage max in
+ * the wrong order
+ */
+static void usbhid_fixup_cypress_descriptor(unsigned char *rdesc, int rsize)
+{
+ short fixed = 0;
+ int i;
+
+ for (i = 0; i < rsize - 4; i++) {
+ if (rdesc[i] == 0x29 && rdesc [i+2] == 0x19) {
+ unsigned char tmp;
+
+ rdesc[i] = 0x19; rdesc[i+2] = 0x29;
+ tmp = rdesc[i+3];
+ rdesc[i+3] = rdesc[i+1];
+ rdesc[i+1] = tmp;
+ }
+ }
+
+ if (fixed)
+ printk(KERN_INFO "Fixing up Cypress report descriptor\n");
+}
+
+
+static void __usbhid_fixup_report_descriptor(__u32 quirks, char *rdesc, unsigned rsize)
+{
+ if ((quirks & HID_QUIRK_RDESC_CYMOTION))
+ usbhid_fixup_cymotion_descriptor(rdesc, rsize);
+
+ if (quirks & HID_QUIRK_RDESC_LOGITECH)
+ usbhid_fixup_logitech_descriptor(rdesc, rsize);
+
+ if (quirks & HID_QUIRK_RDESC_SWAPPED_MIN_MAX)
+ usbhid_fixup_cypress_descriptor(rdesc, rsize);
+
+ if (quirks & HID_QUIRK_RDESC_PETALYNX)
+ usbhid_fixup_petalynx_descriptor(rdesc, rsize);
+}
+
+/**
+ * usbhid_fixup_report_descriptor: check if report descriptor needs fixup
+ *
+ * Description:
+ * Walks the hid_rdesc_blacklist[] array and checks whether the device
+ * is known to have broken report descriptor that needs to be fixed up
+ * prior to entering the HID parser
+ *
+ * Returns: nothing
+ */
+void usbhid_fixup_report_descriptor(const u16 idVendor, const u16 idProduct,
+ char *rdesc, unsigned rsize, char **quirks_param)
+{
+ int n, m;
+ u16 paramVendor, paramProduct;
+ u32 quirks;
+
+ /* static rdesc quirk entries */
+ for (n = 0; hid_rdesc_blacklist[n].idVendor; n++)
+ if (hid_rdesc_blacklist[n].idVendor == idVendor &&
+ hid_rdesc_blacklist[n].idProduct == idProduct)
+ __usbhid_fixup_report_descriptor(hid_rdesc_blacklist[n].quirks,
+ rdesc, rsize);
+
+ /* runtime rdesc quirk entries handling */
+ for (n = 0; quirks_param[n] && n < MAX_USBHID_BOOT_QUIRKS; n++) {
+ m = sscanf(quirks_param[n], "0x%hx:0x%hx:0x%x",
+ ¶mVendor, ¶mProduct, &quirks);
+
+ if (m != 3)
+ printk(KERN_WARNING
+ "Could not parse HID quirk module param %s\n",
+ quirks_param[n]);
+ else if (paramVendor == idVendor && paramProduct == idProduct)
+ __usbhid_fixup_report_descriptor(quirks, rdesc, rsize);
+ }
+
+}