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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Apple Cinema Display driver
4 *
5 * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
6 *
7 * Thanks to Caskey L. Dickson for his work with acdctl.
8 */
9
10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/usb.h>
16#include <linux/backlight.h>
17#include <linux/timer.h>
18#include <linux/workqueue.h>
19#include <linux/atomic.h>
20
21#define APPLE_VENDOR_ID 0x05AC
22
23#define USB_REQ_GET_REPORT 0x01
24#define USB_REQ_SET_REPORT 0x09
25
26#define ACD_USB_TIMEOUT 250
27
28#define ACD_USB_EDID 0x0302
29#define ACD_USB_BRIGHTNESS 0x0310
30
31#define ACD_BTN_NONE 0
32#define ACD_BTN_BRIGHT_UP 3
33#define ACD_BTN_BRIGHT_DOWN 4
34
35#define ACD_URB_BUFFER_LEN 2
36#define ACD_MSG_BUFFER_LEN 2
37
38#define APPLEDISPLAY_DEVICE(prod) \
39 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
40 USB_DEVICE_ID_MATCH_INT_CLASS | \
41 USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
42 .idVendor = APPLE_VENDOR_ID, \
43 .idProduct = (prod), \
44 .bInterfaceClass = USB_CLASS_HID, \
45 .bInterfaceProtocol = 0x00
46
47/* table of devices that work with this driver */
48static const struct usb_device_id appledisplay_table[] = {
49 { APPLEDISPLAY_DEVICE(0x9218) },
50 { APPLEDISPLAY_DEVICE(0x9219) },
51 { APPLEDISPLAY_DEVICE(0x921c) },
52 { APPLEDISPLAY_DEVICE(0x921d) },
53 { APPLEDISPLAY_DEVICE(0x9222) },
54 { APPLEDISPLAY_DEVICE(0x9226) },
55 { APPLEDISPLAY_DEVICE(0x9236) },
56
57 /* Terminating entry */
58 { }
59};
60MODULE_DEVICE_TABLE(usb, appledisplay_table);
61
62/* Structure to hold all of our device specific stuff */
63struct appledisplay {
64 struct usb_device *udev; /* usb device */
65 struct urb *urb; /* usb request block */
66 struct backlight_device *bd; /* backlight device */
67 u8 *urbdata; /* interrupt URB data buffer */
68 u8 *msgdata; /* control message data buffer */
69
70 struct delayed_work work;
71 int button_pressed;
72 struct mutex sysfslock; /* concurrent read and write */
73};
74
75static atomic_t count_displays = ATOMIC_INIT(0);
76
77static void appledisplay_complete(struct urb *urb)
78{
79 struct appledisplay *pdata = urb->context;
80 struct device *dev = &pdata->udev->dev;
81 int status = urb->status;
82 int retval;
83
84 switch (status) {
85 case 0:
86 /* success */
87 break;
88 case -EOVERFLOW:
89 dev_err(dev,
90 "OVERFLOW with data length %d, actual length is %d\n",
91 ACD_URB_BUFFER_LEN, pdata->urb->actual_length);
92 /* fall through */
93 case -ECONNRESET:
94 case -ENOENT:
95 case -ESHUTDOWN:
96 /* This urb is terminated, clean up */
97 dev_dbg(dev, "%s - urb shuttingdown with status: %d\n",
98 __func__, status);
99 return;
100 default:
101 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
102 __func__, status);
103 goto exit;
104 }
105
106 switch(pdata->urbdata[1]) {
107 case ACD_BTN_BRIGHT_UP:
108 case ACD_BTN_BRIGHT_DOWN:
109 pdata->button_pressed = 1;
110 schedule_delayed_work(&pdata->work, 0);
111 break;
112 case ACD_BTN_NONE:
113 default:
114 pdata->button_pressed = 0;
115 break;
116 }
117
118exit:
119 retval = usb_submit_urb(pdata->urb, GFP_ATOMIC);
120 if (retval) {
121 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
122 __func__, retval);
123 }
124}
125
126static int appledisplay_bl_update_status(struct backlight_device *bd)
127{
128 struct appledisplay *pdata = bl_get_data(bd);
129 int retval;
130
131 mutex_lock(&pdata->sysfslock);
132 pdata->msgdata[0] = 0x10;
133 pdata->msgdata[1] = bd->props.brightness;
134
135 retval = usb_control_msg(
136 pdata->udev,
137 usb_sndctrlpipe(pdata->udev, 0),
138 USB_REQ_SET_REPORT,
139 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
140 ACD_USB_BRIGHTNESS,
141 0,
142 pdata->msgdata, 2,
143 ACD_USB_TIMEOUT);
144 mutex_unlock(&pdata->sysfslock);
145
146 if (retval < 0)
147 return retval;
148 else
149 return 0;
150}
151
152static int appledisplay_bl_get_brightness(struct backlight_device *bd)
153{
154 struct appledisplay *pdata = bl_get_data(bd);
155 int retval, brightness;
156
157 mutex_lock(&pdata->sysfslock);
158 retval = usb_control_msg(
159 pdata->udev,
160 usb_rcvctrlpipe(pdata->udev, 0),
161 USB_REQ_GET_REPORT,
162 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
163 ACD_USB_BRIGHTNESS,
164 0,
165 pdata->msgdata, 2,
166 ACD_USB_TIMEOUT);
167 brightness = pdata->msgdata[1];
168 mutex_unlock(&pdata->sysfslock);
169
170 if (retval < 0)
171 return retval;
172 else
173 return brightness;
174}
175
176static const struct backlight_ops appledisplay_bl_data = {
177 .get_brightness = appledisplay_bl_get_brightness,
178 .update_status = appledisplay_bl_update_status,
179};
180
181static void appledisplay_work(struct work_struct *work)
182{
183 struct appledisplay *pdata =
184 container_of(work, struct appledisplay, work.work);
185 int retval;
186
187 retval = appledisplay_bl_get_brightness(pdata->bd);
188 if (retval >= 0)
189 pdata->bd->props.brightness = retval;
190
191 /* Poll again in about 125ms if there's still a button pressed */
192 if (pdata->button_pressed)
193 schedule_delayed_work(&pdata->work, HZ / 8);
194}
195
196static int appledisplay_probe(struct usb_interface *iface,
197 const struct usb_device_id *id)
198{
199 struct backlight_properties props;
200 struct appledisplay *pdata;
201 struct usb_device *udev = interface_to_usbdev(iface);
202 struct usb_endpoint_descriptor *endpoint;
203 int int_in_endpointAddr = 0;
204 int retval, brightness;
205 char bl_name[20];
206
207 /* set up the endpoint information */
208 /* use only the first interrupt-in endpoint */
209 retval = usb_find_int_in_endpoint(iface->cur_altsetting, &endpoint);
210 if (retval) {
211 dev_err(&iface->dev, "Could not find int-in endpoint\n");
212 return retval;
213 }
214
215 int_in_endpointAddr = endpoint->bEndpointAddress;
216
217 /* allocate memory for our device state and initialize it */
218 pdata = kzalloc(sizeof(struct appledisplay), GFP_KERNEL);
219 if (!pdata) {
220 retval = -ENOMEM;
221 goto error;
222 }
223
224 pdata->udev = udev;
225
226 INIT_DELAYED_WORK(&pdata->work, appledisplay_work);
227 mutex_init(&pdata->sysfslock);
228
229 /* Allocate buffer for control messages */
230 pdata->msgdata = kmalloc(ACD_MSG_BUFFER_LEN, GFP_KERNEL);
231 if (!pdata->msgdata) {
232 retval = -ENOMEM;
233 goto error;
234 }
235
236 /* Allocate interrupt URB */
237 pdata->urb = usb_alloc_urb(0, GFP_KERNEL);
238 if (!pdata->urb) {
239 retval = -ENOMEM;
240 goto error;
241 }
242
243 /* Allocate buffer for interrupt data */
244 pdata->urbdata = usb_alloc_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
245 GFP_KERNEL, &pdata->urb->transfer_dma);
246 if (!pdata->urbdata) {
247 retval = -ENOMEM;
248 dev_err(&iface->dev, "Allocating URB buffer failed\n");
249 goto error;
250 }
251
252 /* Configure interrupt URB */
253 usb_fill_int_urb(pdata->urb, udev,
254 usb_rcvintpipe(udev, int_in_endpointAddr),
255 pdata->urbdata, ACD_URB_BUFFER_LEN, appledisplay_complete,
256 pdata, 1);
257 pdata->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
258 if (usb_submit_urb(pdata->urb, GFP_KERNEL)) {
259 retval = -EIO;
260 dev_err(&iface->dev, "Submitting URB failed\n");
261 goto error;
262 }
263
264 /* Register backlight device */
265 snprintf(bl_name, sizeof(bl_name), "appledisplay%d",
266 atomic_inc_return(&count_displays) - 1);
267 memset(&props, 0, sizeof(struct backlight_properties));
268 props.type = BACKLIGHT_RAW;
269 props.max_brightness = 0xff;
270 pdata->bd = backlight_device_register(bl_name, NULL, pdata,
271 &appledisplay_bl_data, &props);
272 if (IS_ERR(pdata->bd)) {
273 dev_err(&iface->dev, "Backlight registration failed\n");
274 retval = PTR_ERR(pdata->bd);
275 goto error;
276 }
277
278 /* Try to get brightness */
279 brightness = appledisplay_bl_get_brightness(pdata->bd);
280
281 if (brightness < 0) {
282 retval = brightness;
283 dev_err(&iface->dev,
284 "Error while getting initial brightness: %d\n", retval);
285 goto error;
286 }
287
288 /* Set brightness in backlight device */
289 pdata->bd->props.brightness = brightness;
290
291 /* save our data pointer in the interface device */
292 usb_set_intfdata(iface, pdata);
293
294 printk(KERN_INFO "appledisplay: Apple Cinema Display connected\n");
295
296 return 0;
297
298error:
299 if (pdata) {
300 if (pdata->urb) {
301 usb_kill_urb(pdata->urb);
302 if (pdata->urbdata)
303 usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
304 pdata->urbdata, pdata->urb->transfer_dma);
305 usb_free_urb(pdata->urb);
306 }
307 if (!IS_ERR(pdata->bd))
308 backlight_device_unregister(pdata->bd);
309 kfree(pdata->msgdata);
310 }
311 usb_set_intfdata(iface, NULL);
312 kfree(pdata);
313 return retval;
314}
315
316static void appledisplay_disconnect(struct usb_interface *iface)
317{
318 struct appledisplay *pdata = usb_get_intfdata(iface);
319
320 if (pdata) {
321 usb_kill_urb(pdata->urb);
322 cancel_delayed_work_sync(&pdata->work);
323 backlight_device_unregister(pdata->bd);
324 usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
325 pdata->urbdata, pdata->urb->transfer_dma);
326 usb_free_urb(pdata->urb);
327 kfree(pdata->msgdata);
328 kfree(pdata);
329 }
330
331 printk(KERN_INFO "appledisplay: Apple Cinema Display disconnected\n");
332}
333
334static struct usb_driver appledisplay_driver = {
335 .name = "appledisplay",
336 .probe = appledisplay_probe,
337 .disconnect = appledisplay_disconnect,
338 .id_table = appledisplay_table,
339};
340
341static int __init appledisplay_init(void)
342{
343 return usb_register(&appledisplay_driver);
344}
345
346static void __exit appledisplay_exit(void)
347{
348 usb_deregister(&appledisplay_driver);
349}
350
351MODULE_AUTHOR("Michael Hanselmann");
352MODULE_DESCRIPTION("Apple Cinema Display driver");
353MODULE_LICENSE("GPL");
354
355module_init(appledisplay_init);
356module_exit(appledisplay_exit);
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Apple Cinema Display driver
4 *
5 * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
6 *
7 * Thanks to Caskey L. Dickson for his work with acdctl.
8 */
9
10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/usb.h>
16#include <linux/backlight.h>
17#include <linux/timer.h>
18#include <linux/workqueue.h>
19#include <linux/atomic.h>
20
21#define APPLE_VENDOR_ID 0x05AC
22
23#define USB_REQ_GET_REPORT 0x01
24#define USB_REQ_SET_REPORT 0x09
25
26#define ACD_USB_TIMEOUT 250
27
28#define ACD_USB_EDID 0x0302
29#define ACD_USB_BRIGHTNESS 0x0310
30
31#define ACD_BTN_NONE 0
32#define ACD_BTN_BRIGHT_UP 3
33#define ACD_BTN_BRIGHT_DOWN 4
34
35#define ACD_URB_BUFFER_LEN 2
36#define ACD_MSG_BUFFER_LEN 2
37
38#define APPLEDISPLAY_DEVICE(prod) \
39 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
40 USB_DEVICE_ID_MATCH_INT_CLASS | \
41 USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
42 .idVendor = APPLE_VENDOR_ID, \
43 .idProduct = (prod), \
44 .bInterfaceClass = USB_CLASS_HID, \
45 .bInterfaceProtocol = 0x00
46
47/* table of devices that work with this driver */
48static const struct usb_device_id appledisplay_table[] = {
49 { APPLEDISPLAY_DEVICE(0x9218) },
50 { APPLEDISPLAY_DEVICE(0x9219) },
51 { APPLEDISPLAY_DEVICE(0x921c) },
52 { APPLEDISPLAY_DEVICE(0x921d) },
53 { APPLEDISPLAY_DEVICE(0x9222) },
54 { APPLEDISPLAY_DEVICE(0x9226) },
55 { APPLEDISPLAY_DEVICE(0x9236) },
56
57 /* Terminating entry */
58 { }
59};
60MODULE_DEVICE_TABLE(usb, appledisplay_table);
61
62/* Structure to hold all of our device specific stuff */
63struct appledisplay {
64 struct usb_device *udev; /* usb device */
65 struct urb *urb; /* usb request block */
66 struct backlight_device *bd; /* backlight device */
67 u8 *urbdata; /* interrupt URB data buffer */
68 u8 *msgdata; /* control message data buffer */
69
70 struct delayed_work work;
71 int button_pressed;
72 struct mutex sysfslock; /* concurrent read and write */
73};
74
75static atomic_t count_displays = ATOMIC_INIT(0);
76
77static void appledisplay_complete(struct urb *urb)
78{
79 struct appledisplay *pdata = urb->context;
80 struct device *dev = &pdata->udev->dev;
81 int status = urb->status;
82 int retval;
83
84 switch (status) {
85 case 0:
86 /* success */
87 break;
88 case -EOVERFLOW:
89 dev_err(dev,
90 "OVERFLOW with data length %d, actual length is %d\n",
91 ACD_URB_BUFFER_LEN, pdata->urb->actual_length);
92 fallthrough;
93 case -ECONNRESET:
94 case -ENOENT:
95 case -ESHUTDOWN:
96 /* This urb is terminated, clean up */
97 dev_dbg(dev, "%s - urb shuttingdown with status: %d\n",
98 __func__, status);
99 return;
100 default:
101 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
102 __func__, status);
103 goto exit;
104 }
105
106 switch(pdata->urbdata[1]) {
107 case ACD_BTN_BRIGHT_UP:
108 case ACD_BTN_BRIGHT_DOWN:
109 pdata->button_pressed = 1;
110 /*
111 * there is a window during which no device
112 * is registered
113 */
114 if (pdata->bd )
115 schedule_delayed_work(&pdata->work, 0);
116 break;
117 case ACD_BTN_NONE:
118 default:
119 pdata->button_pressed = 0;
120 break;
121 }
122
123exit:
124 retval = usb_submit_urb(pdata->urb, GFP_ATOMIC);
125 if (retval) {
126 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
127 __func__, retval);
128 }
129}
130
131static int appledisplay_bl_update_status(struct backlight_device *bd)
132{
133 struct appledisplay *pdata = bl_get_data(bd);
134 int retval;
135
136 mutex_lock(&pdata->sysfslock);
137 pdata->msgdata[0] = 0x10;
138 pdata->msgdata[1] = bd->props.brightness;
139
140 retval = usb_control_msg(
141 pdata->udev,
142 usb_sndctrlpipe(pdata->udev, 0),
143 USB_REQ_SET_REPORT,
144 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
145 ACD_USB_BRIGHTNESS,
146 0,
147 pdata->msgdata, 2,
148 ACD_USB_TIMEOUT);
149 mutex_unlock(&pdata->sysfslock);
150
151 if (retval < 0)
152 return retval;
153 else
154 return 0;
155}
156
157static int appledisplay_bl_get_brightness(struct backlight_device *bd)
158{
159 struct appledisplay *pdata = bl_get_data(bd);
160 int retval, brightness;
161
162 mutex_lock(&pdata->sysfslock);
163 retval = usb_control_msg(
164 pdata->udev,
165 usb_rcvctrlpipe(pdata->udev, 0),
166 USB_REQ_GET_REPORT,
167 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
168 ACD_USB_BRIGHTNESS,
169 0,
170 pdata->msgdata, 2,
171 ACD_USB_TIMEOUT);
172 if (retval < 2) {
173 if (retval >= 0)
174 retval = -EMSGSIZE;
175 } else {
176 brightness = pdata->msgdata[1];
177 }
178 mutex_unlock(&pdata->sysfslock);
179
180 if (retval < 0)
181 return retval;
182 else
183 return brightness;
184}
185
186static const struct backlight_ops appledisplay_bl_data = {
187 .get_brightness = appledisplay_bl_get_brightness,
188 .update_status = appledisplay_bl_update_status,
189};
190
191static void appledisplay_work(struct work_struct *work)
192{
193 struct appledisplay *pdata =
194 container_of(work, struct appledisplay, work.work);
195 int retval;
196
197 retval = appledisplay_bl_get_brightness(pdata->bd);
198 if (retval >= 0)
199 pdata->bd->props.brightness = retval;
200
201 /* Poll again in about 125ms if there's still a button pressed */
202 if (pdata->button_pressed)
203 schedule_delayed_work(&pdata->work, HZ / 8);
204}
205
206static int appledisplay_probe(struct usb_interface *iface,
207 const struct usb_device_id *id)
208{
209 struct backlight_properties props;
210 struct backlight_device *backlight;
211 struct appledisplay *pdata;
212 struct usb_device *udev = interface_to_usbdev(iface);
213 struct usb_endpoint_descriptor *endpoint;
214 int int_in_endpointAddr = 0;
215 int retval, brightness;
216 char bl_name[20];
217
218 /* set up the endpoint information */
219 /* use only the first interrupt-in endpoint */
220 retval = usb_find_int_in_endpoint(iface->cur_altsetting, &endpoint);
221 if (retval) {
222 dev_err(&iface->dev, "Could not find int-in endpoint\n");
223 return retval;
224 }
225
226 int_in_endpointAddr = endpoint->bEndpointAddress;
227
228 /* allocate memory for our device state and initialize it */
229 pdata = kzalloc(sizeof(struct appledisplay), GFP_KERNEL);
230 if (!pdata) {
231 retval = -ENOMEM;
232 goto error;
233 }
234
235 pdata->udev = udev;
236
237 INIT_DELAYED_WORK(&pdata->work, appledisplay_work);
238 mutex_init(&pdata->sysfslock);
239
240 /* Allocate buffer for control messages */
241 pdata->msgdata = kmalloc(ACD_MSG_BUFFER_LEN, GFP_KERNEL);
242 if (!pdata->msgdata) {
243 retval = -ENOMEM;
244 goto error;
245 }
246
247 /* Allocate interrupt URB */
248 pdata->urb = usb_alloc_urb(0, GFP_KERNEL);
249 if (!pdata->urb) {
250 retval = -ENOMEM;
251 goto error;
252 }
253
254 /* Allocate buffer for interrupt data */
255 pdata->urbdata = usb_alloc_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
256 GFP_KERNEL, &pdata->urb->transfer_dma);
257 if (!pdata->urbdata) {
258 retval = -ENOMEM;
259 dev_err(&iface->dev, "Allocating URB buffer failed\n");
260 goto error;
261 }
262
263 /* Configure interrupt URB */
264 usb_fill_int_urb(pdata->urb, udev,
265 usb_rcvintpipe(udev, int_in_endpointAddr),
266 pdata->urbdata, ACD_URB_BUFFER_LEN, appledisplay_complete,
267 pdata, 1);
268 pdata->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
269 if (usb_submit_urb(pdata->urb, GFP_KERNEL)) {
270 retval = -EIO;
271 dev_err(&iface->dev, "Submitting URB failed\n");
272 goto error;
273 }
274
275 /* Register backlight device */
276 snprintf(bl_name, sizeof(bl_name), "appledisplay%d",
277 atomic_inc_return(&count_displays) - 1);
278 memset(&props, 0, sizeof(struct backlight_properties));
279 props.type = BACKLIGHT_RAW;
280 props.max_brightness = 0xff;
281 backlight = backlight_device_register(bl_name, NULL, pdata,
282 &appledisplay_bl_data, &props);
283 if (IS_ERR(backlight)) {
284 dev_err(&iface->dev, "Backlight registration failed\n");
285 retval = PTR_ERR(backlight);
286 goto error;
287 }
288 pdata->bd = backlight;
289
290 /* Try to get brightness */
291 brightness = appledisplay_bl_get_brightness(pdata->bd);
292
293 if (brightness < 0) {
294 retval = brightness;
295 dev_err(&iface->dev,
296 "Error while getting initial brightness: %d\n", retval);
297 goto error;
298 }
299
300 /* Set brightness in backlight device */
301 pdata->bd->props.brightness = brightness;
302
303 /* save our data pointer in the interface device */
304 usb_set_intfdata(iface, pdata);
305
306 printk(KERN_INFO "appledisplay: Apple Cinema Display connected\n");
307
308 return 0;
309
310error:
311 if (pdata) {
312 if (pdata->urb) {
313 usb_kill_urb(pdata->urb);
314 cancel_delayed_work_sync(&pdata->work);
315 usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
316 pdata->urbdata, pdata->urb->transfer_dma);
317 usb_free_urb(pdata->urb);
318 }
319 if (!IS_ERR(pdata->bd))
320 backlight_device_unregister(pdata->bd);
321 kfree(pdata->msgdata);
322 }
323 usb_set_intfdata(iface, NULL);
324 kfree(pdata);
325 return retval;
326}
327
328static void appledisplay_disconnect(struct usb_interface *iface)
329{
330 struct appledisplay *pdata = usb_get_intfdata(iface);
331
332 if (pdata) {
333 usb_kill_urb(pdata->urb);
334 cancel_delayed_work_sync(&pdata->work);
335 backlight_device_unregister(pdata->bd);
336 usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
337 pdata->urbdata, pdata->urb->transfer_dma);
338 usb_free_urb(pdata->urb);
339 kfree(pdata->msgdata);
340 kfree(pdata);
341 }
342
343 printk(KERN_INFO "appledisplay: Apple Cinema Display disconnected\n");
344}
345
346static struct usb_driver appledisplay_driver = {
347 .name = "appledisplay",
348 .probe = appledisplay_probe,
349 .disconnect = appledisplay_disconnect,
350 .id_table = appledisplay_table,
351};
352module_usb_driver(appledisplay_driver);
353
354MODULE_AUTHOR("Michael Hanselmann");
355MODULE_DESCRIPTION("Apple Cinema Display driver");
356MODULE_LICENSE("GPL");