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Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Jiri Slaby
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Jiri Kosina
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Oct 14, 2008
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* | ||
| * HID driver for some cypress "special" devices | ||
| * | ||
| * Copyright (c) 1999 Andreas Gal | ||
| * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> | ||
| * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc | ||
| * Copyright (c) 2006-2007 Jiri Kosina | ||
| * Copyright (c) 2007 Paul Walmsley | ||
| * Copyright (c) 2008 Jiri Slaby | ||
| */ | ||
|
|
||
| /* | ||
| * This program is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License as published by the Free | ||
| * Software Foundation; either version 2 of the License, or (at your option) | ||
| * any later version. | ||
| */ | ||
|
|
||
| #include <linux/device.h> | ||
| #include <linux/hid.h> | ||
| #include <linux/input.h> | ||
| #include <linux/module.h> | ||
|
|
||
| #include "hid-ids.h" | ||
|
|
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| #define CP_RDESC_SWAPPED_MIN_MAX 0x01 | ||
| #define CP_2WHEEL_MOUSE_HACK 0x02 | ||
| #define CP_2WHEEL_MOUSE_HACK_ON 0x04 | ||
|
|
||
| /* | ||
| * Some USB barcode readers from cypress have usage min and usage max in | ||
| * the wrong order | ||
| */ | ||
| static void cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, | ||
| unsigned int rsize) | ||
| { | ||
| unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); | ||
| unsigned int i; | ||
|
|
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| if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX)) | ||
| return; | ||
|
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||
| for (i = 0; i < rsize - 4; i++) | ||
| if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { | ||
| __u8 tmp; | ||
|
|
||
| rdesc[i] = 0x19; | ||
| rdesc[i + 2] = 0x29; | ||
| tmp = rdesc[i + 3]; | ||
| rdesc[i + 3] = rdesc[i + 1]; | ||
| rdesc[i + 1] = tmp; | ||
| } | ||
| } | ||
|
|
||
| static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi, | ||
| struct hid_field *field, struct hid_usage *usage, | ||
| unsigned long **bit, int *max) | ||
| { | ||
| unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); | ||
|
|
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| if (!(quirks & CP_2WHEEL_MOUSE_HACK)) | ||
| return 0; | ||
|
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| if (usage->type == EV_REL && usage->code == REL_WHEEL) | ||
| set_bit(REL_HWHEEL, *bit); | ||
| if (usage->hid == 0x00090005) | ||
| return -1; | ||
|
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| return 0; | ||
| } | ||
|
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| static int cp_event(struct hid_device *hdev, struct hid_field *field, | ||
| struct hid_usage *usage, __s32 value) | ||
| { | ||
| unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); | ||
|
|
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| if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || | ||
| !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK)) | ||
| return 0; | ||
|
|
||
| if (usage->hid == 0x00090005) { | ||
| if (value) | ||
| quirks |= CP_2WHEEL_MOUSE_HACK_ON; | ||
| else | ||
| quirks &= ~CP_2WHEEL_MOUSE_HACK_ON; | ||
| hid_set_drvdata(hdev, (void *)quirks); | ||
| return 1; | ||
| } | ||
|
|
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| if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) { | ||
| struct input_dev *input = field->hidinput->input; | ||
|
|
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| input_event(input, usage->type, REL_HWHEEL, value); | ||
| return 1; | ||
| } | ||
|
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| return 0; | ||
| } | ||
|
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| static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id) | ||
| { | ||
| unsigned long quirks = id->driver_data; | ||
| int ret; | ||
|
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| hid_set_drvdata(hdev, (void *)quirks); | ||
|
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| ret = hid_parse(hdev); | ||
| if (ret) { | ||
| dev_err(&hdev->dev, "parse failed\n"); | ||
| goto err_free; | ||
| } | ||
|
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| ret = hid_hw_start(hdev); | ||
| if (ret) { | ||
| dev_err(&hdev->dev, "hw start failed\n"); | ||
| goto err_free; | ||
| } | ||
|
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| return 0; | ||
| err_free: | ||
| return ret; | ||
| } | ||
|
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| static const struct hid_device_id cp_devices[] = { | ||
| { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1), | ||
| .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, | ||
| { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2), | ||
| .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, | ||
| { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE), | ||
| .driver_data = CP_2WHEEL_MOUSE_HACK }, | ||
| { } | ||
| }; | ||
| MODULE_DEVICE_TABLE(hid, cp_devices); | ||
|
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| static struct hid_driver cp_driver = { | ||
| .name = "cypress", | ||
| .id_table = cp_devices, | ||
| .report_fixup = cp_report_fixup, | ||
| .input_mapped = cp_input_mapped, | ||
| .event = cp_event, | ||
| .probe = cp_probe, | ||
| }; | ||
|
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| static int cp_init(void) | ||
| { | ||
| return hid_register_driver(&cp_driver); | ||
| } | ||
|
|
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| static void cp_exit(void) | ||
| { | ||
| hid_unregister_driver(&cp_driver); | ||
| } | ||
|
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| module_init(cp_init); | ||
| module_exit(cp_exit); | ||
| MODULE_LICENSE("GPL"); | ||
|
|
||
| HID_COMPAT_LOAD_DRIVER(cypress); |
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