1#include <linux/kernel.h> 2#include <linux/slab.h> 3#include <linux/module.h> 4#include <linux/init.h> 5#include <linux/usb/input.h> 6#include <asm/unaligned.h> 7 8/* 9 * Version Information 10 * v0.0.1 - Original, extremely basic version, 2.4.xx only 11 * v0.0.2 - Updated, works with 2.5.62 and 2.4.20; 12 * - added pressure-threshold modules param code from 13 * Alex Perry <alex.perry@ieee.org> 14 */ 15 16#define DRIVER_VERSION "v0.0.2" 17#define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>" 18#define DRIVER_DESC "USB KB Gear JamStudio Tablet driver" 19#define DRIVER_LICENSE "GPL" 20 21MODULE_AUTHOR(DRIVER_AUTHOR); 22MODULE_DESCRIPTION(DRIVER_DESC); 23MODULE_LICENSE(DRIVER_LICENSE); 24 25#define USB_VENDOR_ID_KBGEAR 0x084e 26 27static int kb_pressure_click = 0x10; 28module_param(kb_pressure_click, int, 0); 29MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks"); 30 31struct kbtab { 32 unsigned char *data; 33 dma_addr_t data_dma; 34 struct input_dev *dev; 35 struct usb_device *usbdev; 36 struct urb *irq; 37 char phys[32]; 38}; 39 40static void kbtab_irq(struct urb *urb) 41{ 42 struct kbtab *kbtab = urb->context; 43 unsigned char *data = kbtab->data; 44 struct input_dev *dev = kbtab->dev; 45 int pressure; 46 int retval; 47 48 switch (urb->status) { 49 case 0: 50 /* success */ 51 break; 52 case -ECONNRESET: 53 case -ENOENT: 54 case -ESHUTDOWN: 55 /* this urb is terminated, clean up */ 56 dbg("%s - urb shutting down with status: %d", __func__, urb->status); 57 return; 58 default: 59 dbg("%s - nonzero urb status received: %d", __func__, urb->status); 60 goto exit; 61 } 62 63 64 input_report_key(dev, BTN_TOOL_PEN, 1); 65 66 input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1])); 67 input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3])); 68 69 /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/ 70 input_report_key(dev, BTN_RIGHT, data[0] & 0x02); 71 72 pressure = data[5]; 73 if (kb_pressure_click == -1) 74 input_report_abs(dev, ABS_PRESSURE, pressure); 75 else 76 input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0); 77 78 input_sync(dev); 79 80 exit: 81 retval = usb_submit_urb(urb, GFP_ATOMIC); 82 if (retval) 83 err("%s - usb_submit_urb failed with result %d", 84 __func__, retval); 85} 86 87static struct usb_device_id kbtab_ids[] = { 88 { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 }, 89 { } 90}; 91 92MODULE_DEVICE_TABLE(usb, kbtab_ids); 93 94static int kbtab_open(struct input_dev *dev) 95{ 96 struct kbtab *kbtab = input_get_drvdata(dev); 97 98 kbtab->irq->dev = kbtab->usbdev; 99 if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) 100 return -EIO; 101 102 return 0; 103} 104 105static void kbtab_close(struct input_dev *dev) 106{ 107 struct kbtab *kbtab = input_get_drvdata(dev); 108 109 usb_kill_urb(kbtab->irq); 110} 111 112static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id) 113{ 114 struct usb_device *dev = interface_to_usbdev(intf); 115 struct usb_endpoint_descriptor *endpoint; 116 struct kbtab *kbtab; 117 struct input_dev *input_dev; 118 int error = -ENOMEM; 119 120 kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); 121 input_dev = input_allocate_device(); 122 if (!kbtab || !input_dev) 123 goto fail1; 124 125 kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma); 126 if (!kbtab->data) 127 goto fail1; 128 129 kbtab->irq = usb_alloc_urb(0, GFP_KERNEL); 130 if (!kbtab->irq) 131 goto fail2; 132 133 kbtab->usbdev = dev; 134 kbtab->dev = input_dev; 135 136 usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys)); 137 strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys)); 138 139 input_dev->name = "KB Gear Tablet"; 140 input_dev->phys = kbtab->phys; 141 usb_to_input_id(dev, &input_dev->id); 142 input_dev->dev.parent = &intf->dev; 143 144 input_set_drvdata(input_dev, kbtab); 145 146 input_dev->open = kbtab_open; 147 input_dev->close = kbtab_close; 148 149 input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 150 input_dev->keybit[BIT_WORD(BTN_LEFT)] |= 151 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 152 input_dev->keybit[BIT_WORD(BTN_DIGI)] |= 153 BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_TOUCH); 154 input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0); 155 input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0); 156 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0); 157 158 endpoint = &intf->cur_altsetting->endpoint[0].desc; 159 160 usb_fill_int_urb(kbtab->irq, dev, 161 usb_rcvintpipe(dev, endpoint->bEndpointAddress), 162 kbtab->data, 8, 163 kbtab_irq, kbtab, endpoint->bInterval); 164 kbtab->irq->transfer_dma = kbtab->data_dma; 165 kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 166 167 error = input_register_device(kbtab->dev); 168 if (error) 169 goto fail3; 170 171 usb_set_intfdata(intf, kbtab); 172 173 return 0; 174 175 fail3: usb_free_urb(kbtab->irq); 176 fail2: usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma); 177 fail1: input_free_device(input_dev); 178 kfree(kbtab); 179 return error; 180} 181 182static void kbtab_disconnect(struct usb_interface *intf) 183{ 184 struct kbtab *kbtab = usb_get_intfdata(intf); 185 186 usb_set_intfdata(intf, NULL); 187 188 input_unregister_device(kbtab->dev); 189 usb_free_urb(kbtab->irq); 190 usb_free_coherent(kbtab->usbdev, 8, kbtab->data, kbtab->data_dma); 191 kfree(kbtab); 192} 193 194static struct usb_driver kbtab_driver = { 195 .name = "kbtab", 196 .probe = kbtab_probe, 197 .disconnect = kbtab_disconnect, 198 .id_table = kbtab_ids, 199}; 200 201static int __init kbtab_init(void) 202{ 203 int retval; 204 retval = usb_register(&kbtab_driver); 205 if (retval) 206 goto out; 207 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 208 DRIVER_DESC "\n"); 209out: 210 return retval; 211} 212 213static void __exit kbtab_exit(void) 214{ 215 usb_deregister(&kbtab_driver); 216} 217 218module_init(kbtab_init); 219module_exit(kbtab_exit); 220