diff options
Diffstat (limited to 'drivers/usb/input/kbtab.c')
| -rw-r--r-- | drivers/usb/input/kbtab.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/usb/input/kbtab.c b/drivers/usb/input/kbtab.c new file mode 100644 index 00000000000..a68c5b4e7b3 --- /dev/null +++ b/drivers/usb/input/kbtab.c @@ -0,0 +1,241 @@ +#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 open; + 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; + + if (kbtab->open++) + return 0; + + kbtab->irq->dev = kbtab->usbdev; + if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) { + kbtab->open--; + return -EIO; + } + + return 0; +} + +static void kbtab_close(struct input_dev *dev) +{ + struct kbtab *kbtab = dev->private; + + if (!--kbtab->open) + 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); |