#include <linux/kernel.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/init.h> #include <linux/usb/input.h> #include <asm/unaligned.h> /* * Version Information * v0.0.1 - Original, extremely basic version, 2.4.xx only * v0.0.2 - Updated, works with 2.5.62 and 2.4.20; * - added pressure-threshold modules param code from * Alex Perry <alex.perry@ieee.org> */ #define DRIVER_VERSION "v0.0.2" #define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>" #define DRIVER_DESC "USB KB Gear JamStudio Tablet driver" #define DRIVER_LICENSE "GPL" MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE(DRIVER_LICENSE); #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 { signed char *data; dma_addr_t data_dma; struct input_dev *dev; struct usb_device *usbdev; struct urb *irq; int x, y; int button; int pressure; __u32 serial[2]; 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 retval; switch (urb->status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); return; default: dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); goto exit; } kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1])); kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3])); kbtab->pressure = (data[5]); input_report_key(dev, BTN_TOOL_PEN, 1); input_report_abs(dev, ABS_X, kbtab->x); input_report_abs(dev, ABS_Y, kbtab->y); /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/ input_report_key(dev, BTN_RIGHT, data[0] & 0x02); if (-1 == kb_pressure_click) { input_report_abs(dev, ABS_PRESSURE, kbtab->pressure); } else { input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0); }; input_sync(dev); exit: retval = usb_submit_urb (urb, GFP_ATOMIC); if (retval) err ("%s - usb_submit_urb failed with result %d", __FUNCTION__, retval); } static 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 = dev->private; kbtab->irq->dev = kbtab->usbdev; if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) return -EIO; return 0; } static void kbtab_close(struct input_dev *dev) { struct kbtab *kbtab = dev->private; 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; kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); input_dev = input_allocate_device(); if (!kbtab || !input_dev) goto fail1; kbtab->data = usb_buffer_alloc(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->usbdev = dev; 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->cdev.dev = &intf->dev; input_dev->private = kbtab; input_dev->open = kbtab_open; input_dev->close = kbtab_close; input_dev->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC); input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE); input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH); input_dev->mscbit[0] |= BIT(MSC_SERIAL); 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); endpoint = &intf->cur_altsetting->endpoint[0].desc; 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; input_register_device(kbtab->dev); usb_set_intfdata(intf, kbtab); return 0; fail2: usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma); fail1: input_free_device(input_dev); kfree(kbtab); return -ENOMEM; } static void kbtab_disconnect(struct usb_interface *intf) { struct kbtab *kbtab = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); if (kbtab) { usb_kill_urb(kbtab->irq); input_unregister_device(kbtab->dev); usb_free_urb(kbtab->irq); usb_buffer_free(interface_to_usbdev(intf), 10, 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, }; static int __init kbtab_init(void) { int retval; retval = usb_register(&kbtab_driver); if (retval) goto out; info(DRIVER_VERSION ":" DRIVER_DESC); out: return retval; } static void __exit kbtab_exit(void) { usb_deregister(&kbtab_driver); } module_init(kbtab_init); module_exit(kbtab_exit);