Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205// SPDX-License-Identifier: GPL-2.0-only#include <linux/kernel.h>#include <linux/slab.h>#include <linux/module.h>#include <linux/usb/input.h>#include <linux/unaligned.h>
/* * Pressure-threshold modules param code from Alex Perry <alex.perry@ieee.org> */
MODULE_AUTHOR("Josh Myer <josh@joshisanerd.com>");MODULE_DESCRIPTION("USB KB Gear JamStudio Tablet driver");MODULE_LICENSE("GPL");
#define USB_VENDOR_ID_KBGEAR 0x084e
static int kb_pressure_click = 0x10;module_param(kb_pressure_click, int, 0);MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
struct kbtab { unsigned char *data; dma_addr_t data_dma; struct input_dev *dev; struct usb_interface *intf; struct urb *irq; char phys[32];};
static void kbtab_irq(struct urb *urb){ struct kbtab *kbtab = urb->context; unsigned char *data = kbtab->data; struct input_dev *dev = kbtab->dev; int pressure; int retval;
switch (urb->status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dev_dbg(&kbtab->intf->dev, "%s - urb shutting down with status: %d\n", __func__, urb->status); return; default: dev_dbg(&kbtab->intf->dev, "%s - nonzero urb status received: %d\n", __func__, urb->status); goto exit; }
input_report_key(dev, BTN_TOOL_PEN, 1);
input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1])); input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3]));
/*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/ input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
pressure = data[5]; if (kb_pressure_click == -1) input_report_abs(dev, ABS_PRESSURE, pressure); else input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0);
input_sync(dev);
exit: retval = usb_submit_urb(urb, GFP_ATOMIC); if (retval) dev_err(&kbtab->intf->dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);}
static const struct usb_device_id kbtab_ids[] = { { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 }, { }};
MODULE_DEVICE_TABLE(usb, kbtab_ids);
static int kbtab_open(struct input_dev *dev){ struct kbtab *kbtab = input_get_drvdata(dev); struct usb_device *udev = interface_to_usbdev(kbtab->intf);
kbtab->irq->dev = udev; if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) return -EIO;
return 0;}
static void kbtab_close(struct input_dev *dev){ struct kbtab *kbtab = input_get_drvdata(dev);
usb_kill_urb(kbtab->irq);}
static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id){ struct usb_device *dev = interface_to_usbdev(intf); struct usb_endpoint_descriptor *endpoint; struct kbtab *kbtab; struct input_dev *input_dev; int error = -ENOMEM;
if (intf->cur_altsetting->desc.bNumEndpoints < 1) return -ENODEV;
endpoint = &intf->cur_altsetting->endpoint[0].desc; if (!usb_endpoint_is_int_in(endpoint)) return -ENODEV;
kbtab = kzalloc_obj(*kbtab); input_dev = input_allocate_device(); if (!kbtab || !input_dev) goto fail1;
kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma); if (!kbtab->data) goto fail1;
kbtab->irq = usb_alloc_urb(0, GFP_KERNEL); if (!kbtab->irq) goto fail2;
kbtab->intf = intf; kbtab->dev = input_dev;
usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys)); strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
input_dev->name = "KB Gear Tablet"; input_dev->phys = kbtab->phys; usb_to_input_id(dev, &input_dev->id); input_dev->dev.parent = &intf->dev;
input_set_drvdata(input_dev, kbtab);
input_dev->open = kbtab_open; input_dev->close = kbtab_close;
input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_TOUCH); input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0); input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0); input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
usb_fill_int_urb(kbtab->irq, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress), kbtab->data, 8, kbtab_irq, kbtab, endpoint->bInterval); kbtab->irq->transfer_dma = kbtab->data_dma; kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
error = input_register_device(kbtab->dev); if (error) goto fail3;
usb_set_intfdata(intf, kbtab);
return 0;
fail3: usb_free_urb(kbtab->irq); fail2: usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma); fail1: input_free_device(input_dev); kfree(kbtab); return error;}
static void kbtab_disconnect(struct usb_interface *intf){ struct kbtab *kbtab = usb_get_intfdata(intf); struct usb_device *udev = interface_to_usbdev(intf);
usb_set_intfdata(intf, NULL);
input_unregister_device(kbtab->dev); usb_free_urb(kbtab->irq); usb_free_coherent(udev, 8, kbtab->data, kbtab->data_dma); kfree(kbtab);}
static struct usb_driver kbtab_driver = { .name = "kbtab", .probe = kbtab_probe, .disconnect = kbtab_disconnect, .id_table = kbtab_ids,};
module_usb_driver(kbtab_driver);