Xing Wei | bba5394 | 2010-09-01 23:25:35 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * USB Hanwang tablet support |
| 3 | * |
| 4 | * Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn> |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <linux/types.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/usb/input.h> |
| 31 | |
| 32 | #define DRIVER_AUTHOR "Xing Wei <weixing@hanwang.com.cn>" |
| 33 | #define DRIVER_DESC "USB Hanwang tablet driver" |
| 34 | #define DRIVER_LICENSE "GPL" |
| 35 | |
| 36 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 37 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 38 | MODULE_LICENSE(DRIVER_LICENSE); |
| 39 | |
| 40 | #define USB_VENDOR_ID_HANWANG 0x0b57 |
| 41 | #define HANWANG_TABLET_INT_CLASS 0x0003 |
| 42 | #define HANWANG_TABLET_INT_SUB_CLASS 0x0001 |
| 43 | #define HANWANG_TABLET_INT_PROTOCOL 0x0002 |
| 44 | |
| 45 | #define ART_MASTERIII_PKGLEN_MAX 10 |
| 46 | |
| 47 | /* match vendor and interface info */ |
| 48 | #define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \ |
| 49 | .match_flags = USB_DEVICE_ID_MATCH_VENDOR \ |
| 50 | | USB_DEVICE_ID_MATCH_INT_INFO, \ |
| 51 | .idVendor = (vend), \ |
| 52 | .bInterfaceClass = (cl), \ |
| 53 | .bInterfaceSubClass = (sc), \ |
| 54 | .bInterfaceProtocol = (pr) |
| 55 | |
| 56 | struct hanwang { |
| 57 | unsigned char *data; |
| 58 | dma_addr_t data_dma; |
| 59 | struct input_dev *dev; |
| 60 | struct usb_device *usbdev; |
| 61 | struct urb *irq; |
| 62 | const struct hanwang_features *features; |
| 63 | unsigned int current_tool; |
| 64 | char name[64]; |
| 65 | char phys[32]; |
| 66 | }; |
| 67 | |
| 68 | struct hanwang_features { |
| 69 | unsigned short pid; |
| 70 | char *name; |
| 71 | int pkg_len; |
| 72 | int max_x; |
| 73 | int max_y; |
| 74 | int max_tilt_x; |
| 75 | int max_tilt_y; |
| 76 | int max_pressure; |
| 77 | }; |
| 78 | |
| 79 | static const struct hanwang_features features_array[] = { |
| 80 | { 0x8528, "Hanwang Art Master III 0906", |
| 81 | ART_MASTERIII_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 }, |
| 82 | { 0x8529, "Hanwang Art Master III 0604", |
| 83 | ART_MASTERIII_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 }, |
| 84 | { 0x852a, "Hanwang Art Master III 1308", |
| 85 | ART_MASTERIII_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 }, |
| 86 | }; |
| 87 | |
| 88 | static const int hw_eventtypes[] = { |
| 89 | EV_KEY, EV_ABS, |
| 90 | }; |
| 91 | |
| 92 | static const int hw_absevents[] = { |
| 93 | ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL, ABS_PRESSURE, |
| 94 | }; |
| 95 | |
| 96 | static const int hw_btnevents[] = { |
| 97 | BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER, BTN_TOOL_MOUSE, |
| 98 | BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 |
| 99 | }; |
| 100 | |
| 101 | static void hanwang_parse_packet(struct hanwang *hanwang) |
| 102 | { |
| 103 | unsigned char *data = hanwang->data; |
| 104 | struct input_dev *input_dev = hanwang->dev; |
| 105 | struct usb_device *dev = hanwang->usbdev; |
| 106 | int i; |
| 107 | |
| 108 | switch (data[0]) { |
| 109 | case 0x02: /* data packet */ |
| 110 | switch (data[1]) { |
| 111 | case 0x80: /* tool prox out */ |
| 112 | input_report_key(input_dev, hanwang->current_tool, 0); |
| 113 | break; |
| 114 | |
| 115 | case 0xc2: /* first time tool prox in */ |
| 116 | switch (data[3] & 0xf0) { |
| 117 | case 0x20: |
| 118 | hanwang->current_tool = BTN_TOOL_PEN; |
| 119 | input_report_key(input_dev, BTN_TOOL_PEN, 1); |
| 120 | break; |
| 121 | case 0xa0: |
| 122 | hanwang->current_tool = BTN_TOOL_RUBBER; |
| 123 | input_report_key(input_dev, BTN_TOOL_RUBBER, 1); |
| 124 | break; |
| 125 | default: |
| 126 | dev_dbg(&dev->dev, |
| 127 | "unknown tablet tool %02x ", data[0]); |
| 128 | break; |
| 129 | } |
| 130 | break; |
| 131 | |
| 132 | default: /* tool data packet */ |
| 133 | input_report_abs(input_dev, ABS_X, |
| 134 | (data[2] << 8) | data[3]); |
| 135 | input_report_abs(input_dev, ABS_Y, |
| 136 | (data[4] << 8) | data[5]); |
| 137 | input_report_abs(input_dev, ABS_PRESSURE, |
| 138 | (data[6] << 3) | |
| 139 | ((data[7] & 0xc0) >> 5) | |
| 140 | (data[1] & 0x01)); |
| 141 | input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f); |
| 142 | input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f); |
| 143 | input_report_key(input_dev, BTN_STYLUS, data[1] & 0x02); |
| 144 | input_report_key(input_dev, BTN_STYLUS2, data[1] & 0x04); |
| 145 | break; |
| 146 | } |
| 147 | break; |
| 148 | |
| 149 | case 0x0c: |
| 150 | /* roll wheel */ |
| 151 | input_report_abs(input_dev, ABS_WHEEL, data[1]); |
| 152 | input_report_key(input_dev, BTN_0, data[2]); |
| 153 | for (i = 0; i < 8; i++) |
| 154 | input_report_key(input_dev, |
| 155 | BTN_1 + i, data[3] & (1 << i)); |
| 156 | break; |
| 157 | |
| 158 | default: |
| 159 | dev_dbg(&dev->dev, "error packet %02x ", data[0]); |
| 160 | break; |
| 161 | } |
| 162 | |
| 163 | input_sync(input_dev); |
| 164 | } |
| 165 | |
| 166 | static void hanwang_irq(struct urb *urb) |
| 167 | { |
| 168 | struct hanwang *hanwang = urb->context; |
| 169 | struct usb_device *dev = hanwang->usbdev; |
| 170 | int retval; |
| 171 | |
| 172 | switch (urb->status) { |
| 173 | case 0: |
| 174 | /* success */; |
| 175 | hanwang_parse_packet(hanwang); |
| 176 | break; |
| 177 | case -ECONNRESET: |
| 178 | case -ENOENT: |
| 179 | case -ESHUTDOWN: |
| 180 | /* this urb is terminated, clean up */ |
| 181 | dev_err(&dev->dev, "%s - urb shutting down with status: %d", |
| 182 | __func__, urb->status); |
| 183 | return; |
| 184 | default: |
| 185 | dev_err(&dev->dev, "%s - nonzero urb status received: %d", |
| 186 | __func__, urb->status); |
| 187 | break; |
| 188 | } |
| 189 | |
| 190 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
| 191 | if (retval) |
| 192 | dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d", |
| 193 | __func__, retval); |
| 194 | } |
| 195 | |
| 196 | static int hanwang_open(struct input_dev *dev) |
| 197 | { |
| 198 | struct hanwang *hanwang = input_get_drvdata(dev); |
| 199 | |
| 200 | hanwang->irq->dev = hanwang->usbdev; |
| 201 | if (usb_submit_urb(hanwang->irq, GFP_KERNEL)) |
| 202 | return -EIO; |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static void hanwang_close(struct input_dev *dev) |
| 208 | { |
| 209 | struct hanwang *hanwang = input_get_drvdata(dev); |
| 210 | |
| 211 | usb_kill_urb(hanwang->irq); |
| 212 | } |
| 213 | |
| 214 | static bool get_features(struct usb_device *dev, struct hanwang *hanwang) |
| 215 | { |
| 216 | int i; |
| 217 | |
| 218 | for (i = 0; i < ARRAY_SIZE(features_array); i++) { |
| 219 | if (le16_to_cpu(dev->descriptor.idProduct) == |
| 220 | features_array[i].pid) { |
| 221 | hanwang->features = &features_array[i]; |
| 222 | return true; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | return false; |
| 227 | } |
| 228 | |
| 229 | |
| 230 | static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| 231 | { |
| 232 | struct usb_device *dev = interface_to_usbdev(intf); |
| 233 | struct usb_endpoint_descriptor *endpoint; |
| 234 | struct hanwang *hanwang; |
| 235 | struct input_dev *input_dev; |
| 236 | int error; |
| 237 | int i; |
| 238 | |
| 239 | hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL); |
| 240 | input_dev = input_allocate_device(); |
| 241 | if (!hanwang || !input_dev) { |
| 242 | error = -ENOMEM; |
| 243 | goto fail1; |
| 244 | } |
| 245 | |
| 246 | if (!get_features(dev, hanwang)) { |
| 247 | error = -ENXIO; |
| 248 | goto fail1; |
| 249 | } |
| 250 | |
| 251 | hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len, |
| 252 | GFP_KERNEL, &hanwang->data_dma); |
| 253 | if (!hanwang->data) { |
| 254 | error = -ENOMEM; |
| 255 | goto fail1; |
| 256 | } |
| 257 | |
| 258 | hanwang->irq = usb_alloc_urb(0, GFP_KERNEL); |
| 259 | if (!hanwang->irq) { |
| 260 | error = -ENOMEM; |
| 261 | goto fail2; |
| 262 | } |
| 263 | |
| 264 | hanwang->usbdev = dev; |
| 265 | hanwang->dev = input_dev; |
| 266 | |
| 267 | usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys)); |
| 268 | strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys)); |
| 269 | |
| 270 | strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name)); |
| 271 | input_dev->name = hanwang->name; |
| 272 | input_dev->phys = hanwang->phys; |
| 273 | usb_to_input_id(dev, &input_dev->id); |
| 274 | input_dev->dev.parent = &intf->dev; |
| 275 | |
| 276 | input_set_drvdata(input_dev, hanwang); |
| 277 | |
| 278 | input_dev->open = hanwang_open; |
| 279 | input_dev->close = hanwang_close; |
| 280 | |
| 281 | for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i) |
| 282 | __set_bit(hw_eventtypes[i], input_dev->evbit); |
| 283 | |
| 284 | for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i) |
| 285 | __set_bit(hw_absevents[i], input_dev->absbit); |
| 286 | |
| 287 | for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i) |
| 288 | __set_bit(hw_btnevents[i], input_dev->keybit); |
| 289 | |
| 290 | input_set_abs_params(input_dev, ABS_X, |
| 291 | 0, hanwang->features->max_x, 4, 0); |
| 292 | input_set_abs_params(input_dev, ABS_Y, |
| 293 | 0, hanwang->features->max_y, 4, 0); |
| 294 | input_set_abs_params(input_dev, ABS_TILT_X, |
| 295 | 0, hanwang->features->max_tilt_x, 0, 0); |
| 296 | input_set_abs_params(input_dev, ABS_TILT_Y, |
| 297 | 0, hanwang->features->max_tilt_y, 0, 0); |
| 298 | input_set_abs_params(input_dev, ABS_PRESSURE, |
| 299 | 0, hanwang->features->max_pressure, 0, 0); |
| 300 | |
| 301 | endpoint = &intf->cur_altsetting->endpoint[0].desc; |
| 302 | usb_fill_int_urb(hanwang->irq, dev, |
| 303 | usb_rcvintpipe(dev, endpoint->bEndpointAddress), |
| 304 | hanwang->data, hanwang->features->pkg_len, |
| 305 | hanwang_irq, hanwang, endpoint->bInterval); |
| 306 | hanwang->irq->transfer_dma = hanwang->data_dma; |
| 307 | hanwang->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 308 | |
| 309 | error = input_register_device(hanwang->dev); |
| 310 | if (error) |
| 311 | goto fail3; |
| 312 | |
| 313 | usb_set_intfdata(intf, hanwang); |
| 314 | |
| 315 | return 0; |
| 316 | |
| 317 | fail3: usb_free_urb(hanwang->irq); |
| 318 | fail2: usb_free_coherent(dev, hanwang->features->pkg_len, |
| 319 | hanwang->data, hanwang->data_dma); |
| 320 | fail1: input_free_device(input_dev); |
| 321 | kfree(hanwang); |
| 322 | return error; |
| 323 | |
| 324 | } |
| 325 | |
| 326 | static void hanwang_disconnect(struct usb_interface *intf) |
| 327 | { |
| 328 | struct hanwang *hanwang = usb_get_intfdata(intf); |
| 329 | |
| 330 | input_unregister_device(hanwang->dev); |
| 331 | usb_free_urb(hanwang->irq); |
| 332 | usb_free_coherent(interface_to_usbdev(intf), |
| 333 | hanwang->features->pkg_len, hanwang->data, |
| 334 | hanwang->data_dma); |
| 335 | kfree(hanwang); |
| 336 | usb_set_intfdata(intf, NULL); |
| 337 | } |
| 338 | |
| 339 | static const struct usb_device_id hanwang_ids[] = { |
| 340 | { HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS, |
| 341 | HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL) }, |
| 342 | {} |
| 343 | }; |
| 344 | |
| 345 | MODULE_DEVICE_TABLE(usb, hanwang_ids); |
| 346 | |
| 347 | static struct usb_driver hanwang_driver = { |
| 348 | .name = "hanwang", |
| 349 | .probe = hanwang_probe, |
| 350 | .disconnect = hanwang_disconnect, |
| 351 | .id_table = hanwang_ids, |
| 352 | }; |
| 353 | |
| 354 | static int __init hanwang_init(void) |
| 355 | { |
| 356 | return usb_register(&hanwang_driver); |
| 357 | } |
| 358 | |
| 359 | static void __exit hanwang_exit(void) |
| 360 | { |
| 361 | usb_deregister(&hanwang_driver); |
| 362 | } |
| 363 | |
| 364 | module_init(hanwang_init); |
| 365 | module_exit(hanwang_exit); |