| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/input.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/usb.h> |
| #include <asm/unaligned.h> |
| #include <asm/byteorder.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 pt_regs *regs) |
| { |
| 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; |
| char path[64]; |
| |
| if (!(kbtab = kmalloc(sizeof(struct kbtab), GFP_KERNEL))) |
| return -ENOMEM; |
| memset(kbtab, 0, sizeof(struct kbtab)); |
| |
| kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma); |
| if (!kbtab->data) { |
| kfree(kbtab); |
| return -ENOMEM; |
| } |
| |
| kbtab->irq = usb_alloc_urb(0, GFP_KERNEL); |
| if (!kbtab->irq) { |
| usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma); |
| kfree(kbtab); |
| return -ENOMEM; |
| } |
| |
| kbtab->dev.evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC); |
| kbtab->dev.absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE); |
| |
| kbtab->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE); |
| |
| kbtab->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH); |
| |
| kbtab->dev.mscbit[0] |= BIT(MSC_SERIAL); |
| |
| kbtab->dev.absmax[ABS_X] = 0x2000; |
| kbtab->dev.absmax[ABS_Y] = 0x1750; |
| kbtab->dev.absmax[ABS_PRESSURE] = 0xff; |
| |
| kbtab->dev.absfuzz[ABS_X] = 4; |
| kbtab->dev.absfuzz[ABS_Y] = 4; |
| |
| kbtab->dev.private = kbtab; |
| kbtab->dev.open = kbtab_open; |
| kbtab->dev.close = kbtab_close; |
| |
| usb_make_path(dev, path, 64); |
| sprintf(kbtab->phys, "%s/input0", path); |
| |
| kbtab->dev.name = "KB Gear Tablet"; |
| kbtab->dev.phys = kbtab->phys; |
| kbtab->dev.id.bustype = BUS_USB; |
| kbtab->dev.id.vendor = le16_to_cpu(dev->descriptor.idVendor); |
| kbtab->dev.id.product = le16_to_cpu(dev->descriptor.idProduct); |
| kbtab->dev.id.version = le16_to_cpu(dev->descriptor.bcdDevice); |
| kbtab->dev.dev = &intf->dev; |
| kbtab->usbdev = dev; |
| |
| 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); |
| |
| printk(KERN_INFO "input: KB Gear Tablet on %s\n", path); |
| |
| usb_set_intfdata(intf, kbtab); |
| |
| return 0; |
| } |
| |
| 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 = { |
| .owner = THIS_MODULE, |
| .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); |