mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
242 lines
5.7 KiB
C
242 lines
5.7 KiB
C
![]() |
#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/usb.h>
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#include <asm/unaligned.h>
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#include <asm/byteorder.h>
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/*
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* Version Information
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* v0.0.1 - Original, extremely basic version, 2.4.xx only
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* v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
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* - added pressure-threshold modules param code from
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* Alex Perry <alex.perry@ieee.org>
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*/
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#define DRIVER_VERSION "v0.0.2"
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#define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
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#define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
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#define DRIVER_LICENSE "GPL"
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE(DRIVER_LICENSE);
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#define USB_VENDOR_ID_KBGEAR 0x084e
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static int kb_pressure_click = 0x10;
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module_param(kb_pressure_click, int, 0);
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MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
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struct kbtab {
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signed char *data;
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dma_addr_t data_dma;
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struct input_dev dev;
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struct usb_device *usbdev;
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struct urb *irq;
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int open;
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int x, y;
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int button;
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int pressure;
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__u32 serial[2];
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char phys[32];
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};
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static void kbtab_irq(struct urb *urb, struct pt_regs *regs)
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{
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struct kbtab *kbtab = urb->context;
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unsigned char *data = kbtab->data;
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struct input_dev *dev = &kbtab->dev;
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int retval;
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switch (urb->status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* this urb is terminated, clean up */
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dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
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return;
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default:
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dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
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goto exit;
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}
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kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1]));
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kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3]));
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kbtab->pressure = (data[5]);
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input_report_key(dev, BTN_TOOL_PEN, 1);
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input_report_abs(dev, ABS_X, kbtab->x);
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input_report_abs(dev, ABS_Y, kbtab->y);
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/*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
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input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
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if( -1 == kb_pressure_click){
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input_report_abs(dev, ABS_PRESSURE, kbtab->pressure);
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} else {
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input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0);
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};
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input_sync(dev);
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exit:
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retval = usb_submit_urb (urb, GFP_ATOMIC);
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if (retval)
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err ("%s - usb_submit_urb failed with result %d",
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__FUNCTION__, retval);
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}
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static struct usb_device_id kbtab_ids[] = {
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{ USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, kbtab_ids);
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static int kbtab_open(struct input_dev *dev)
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{
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struct kbtab *kbtab = dev->private;
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if (kbtab->open++)
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return 0;
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kbtab->irq->dev = kbtab->usbdev;
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if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) {
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kbtab->open--;
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return -EIO;
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}
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return 0;
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}
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static void kbtab_close(struct input_dev *dev)
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{
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struct kbtab *kbtab = dev->private;
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if (!--kbtab->open)
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usb_kill_urb(kbtab->irq);
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}
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static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id)
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{
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struct usb_device *dev = interface_to_usbdev(intf);
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struct usb_endpoint_descriptor *endpoint;
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struct kbtab *kbtab;
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char path[64];
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if (!(kbtab = kmalloc(sizeof(struct kbtab), GFP_KERNEL)))
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return -ENOMEM;
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memset(kbtab, 0, sizeof(struct kbtab));
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kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma);
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if (!kbtab->data) {
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kfree(kbtab);
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return -ENOMEM;
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}
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kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
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if (!kbtab->irq) {
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usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma);
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kfree(kbtab);
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return -ENOMEM;
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}
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kbtab->dev.evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
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kbtab->dev.absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
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kbtab->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
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kbtab->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
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kbtab->dev.mscbit[0] |= BIT(MSC_SERIAL);
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kbtab->dev.absmax[ABS_X] = 0x2000;
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kbtab->dev.absmax[ABS_Y] = 0x1750;
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kbtab->dev.absmax[ABS_PRESSURE] = 0xff;
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kbtab->dev.absfuzz[ABS_X] = 4;
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kbtab->dev.absfuzz[ABS_Y] = 4;
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kbtab->dev.private = kbtab;
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kbtab->dev.open = kbtab_open;
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kbtab->dev.close = kbtab_close;
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usb_make_path(dev, path, 64);
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sprintf(kbtab->phys, "%s/input0", path);
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kbtab->dev.name = "KB Gear Tablet";
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kbtab->dev.phys = kbtab->phys;
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kbtab->dev.id.bustype = BUS_USB;
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kbtab->dev.id.vendor = le16_to_cpu(dev->descriptor.idVendor);
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kbtab->dev.id.product = le16_to_cpu(dev->descriptor.idProduct);
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kbtab->dev.id.version = le16_to_cpu(dev->descriptor.bcdDevice);
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kbtab->dev.dev = &intf->dev;
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kbtab->usbdev = dev;
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endpoint = &intf->cur_altsetting->endpoint[0].desc;
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usb_fill_int_urb(kbtab->irq, dev,
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usb_rcvintpipe(dev, endpoint->bEndpointAddress),
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kbtab->data, 8,
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kbtab_irq, kbtab, endpoint->bInterval);
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kbtab->irq->transfer_dma = kbtab->data_dma;
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kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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input_register_device(&kbtab->dev);
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printk(KERN_INFO "input: KB Gear Tablet on %s\n", path);
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usb_set_intfdata(intf, kbtab);
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return 0;
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}
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static void kbtab_disconnect(struct usb_interface *intf)
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{
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struct kbtab *kbtab = usb_get_intfdata (intf);
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usb_set_intfdata(intf, NULL);
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if (kbtab) {
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usb_kill_urb(kbtab->irq);
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input_unregister_device(&kbtab->dev);
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usb_free_urb(kbtab->irq);
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usb_buffer_free(interface_to_usbdev(intf), 10, kbtab->data, kbtab->data_dma);
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kfree(kbtab);
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}
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}
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static struct usb_driver kbtab_driver = {
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.owner = THIS_MODULE,
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.name = "kbtab",
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.probe = kbtab_probe,
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.disconnect = kbtab_disconnect,
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.id_table = kbtab_ids,
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};
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static int __init kbtab_init(void)
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{
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int retval;
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retval = usb_register(&kbtab_driver);
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if (retval)
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goto out;
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info(DRIVER_VERSION ":" DRIVER_DESC);
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out:
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return retval;
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}
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static void __exit kbtab_exit(void)
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{
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usb_deregister(&kbtab_driver);
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}
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module_init(kbtab_init);
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module_exit(kbtab_exit);
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