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yaml --- r: 114432 b: refs/heads/master c: 0f22132 h: refs/heads/master v: v3
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Jiri Slaby
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Jiri Kosina
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Oct 14, 2008
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--- | ||
refs/heads/master: 90231e7eaf752856a2c13f786f36ec7f641bad28 | ||
refs/heads/master: 0f2213208f8da51bcb665309e3468f000489c04f |
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/* | ||
* 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 | ||
*/ | ||
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/* | ||
* 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. | ||
*/ | ||
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#include <linux/device.h> | ||
#include <linux/hid.h> | ||
#include <linux/input.h> | ||
#include <linux/module.h> | ||
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#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 | ||
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/* | ||
* 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; | ||
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rdesc[i] = 0x19; | ||
rdesc[i + 2] = 0x29; | ||
tmp = rdesc[i + 3]; | ||
rdesc[i + 3] = rdesc[i + 1]; | ||
rdesc[i + 1] = tmp; | ||
} | ||
} | ||
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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; | ||
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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"); | ||
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HID_COMPAT_LOAD_DRIVER(cypress); |
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