akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Apple Cinema Display driver |
| 3 | * |
| 4 | * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch) |
| 5 | * |
| 6 | * Thanks to Caskey L. Dickson for his work with acdctl. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 21 | */ |
| 22 | |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 28 | #include <linux/usb.h> |
| 29 | #include <linux/backlight.h> |
| 30 | #include <linux/timer.h> |
| 31 | #include <linux/workqueue.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 32 | #include <linux/atomic.h> |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 33 | |
| 34 | #define APPLE_VENDOR_ID 0x05AC |
| 35 | |
| 36 | #define USB_REQ_GET_REPORT 0x01 |
| 37 | #define USB_REQ_SET_REPORT 0x09 |
| 38 | |
| 39 | #define ACD_USB_TIMEOUT 250 |
| 40 | |
| 41 | #define ACD_USB_EDID 0x0302 |
| 42 | #define ACD_USB_BRIGHTNESS 0x0310 |
| 43 | |
| 44 | #define ACD_BTN_NONE 0 |
| 45 | #define ACD_BTN_BRIGHT_UP 3 |
| 46 | #define ACD_BTN_BRIGHT_DOWN 4 |
| 47 | |
| 48 | #define ACD_URB_BUFFER_LEN 2 |
| 49 | #define ACD_MSG_BUFFER_LEN 2 |
| 50 | |
| 51 | #define APPLEDISPLAY_DEVICE(prod) \ |
| 52 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ |
| 53 | USB_DEVICE_ID_MATCH_INT_CLASS | \ |
| 54 | USB_DEVICE_ID_MATCH_INT_PROTOCOL, \ |
| 55 | .idVendor = APPLE_VENDOR_ID, \ |
| 56 | .idProduct = (prod), \ |
| 57 | .bInterfaceClass = USB_CLASS_HID, \ |
| 58 | .bInterfaceProtocol = 0x00 |
| 59 | |
| 60 | /* table of devices that work with this driver */ |
Németh Márton | 33b9e16 | 2010-01-10 15:34:45 +0100 | [diff] [blame] | 61 | static const struct usb_device_id appledisplay_table[] = { |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 62 | { APPLEDISPLAY_DEVICE(0x9218) }, |
| 63 | { APPLEDISPLAY_DEVICE(0x9219) }, |
pancho horrillo | 4b372072 | 2009-12-02 20:19:42 +0100 | [diff] [blame] | 64 | { APPLEDISPLAY_DEVICE(0x921c) }, |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 65 | { APPLEDISPLAY_DEVICE(0x921d) }, |
Ben Jencks | e7d3b6e | 2013-04-02 00:35:08 -0400 | [diff] [blame] | 66 | { APPLEDISPLAY_DEVICE(0x9236) }, |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 67 | |
| 68 | /* Terminating entry */ |
| 69 | { } |
| 70 | }; |
| 71 | MODULE_DEVICE_TABLE(usb, appledisplay_table); |
| 72 | |
| 73 | /* Structure to hold all of our device specific stuff */ |
| 74 | struct appledisplay { |
| 75 | struct usb_device *udev; /* usb device */ |
| 76 | struct urb *urb; /* usb request block */ |
| 77 | struct backlight_device *bd; /* backlight device */ |
pancho horrillo | 37e9066 | 2009-12-23 11:09:13 +0100 | [diff] [blame] | 78 | u8 *urbdata; /* interrupt URB data buffer */ |
| 79 | u8 *msgdata; /* control message data buffer */ |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 80 | |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 81 | struct delayed_work work; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 82 | int button_pressed; |
| 83 | spinlock_t lock; |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 84 | struct mutex sysfslock; /* concurrent read and write */ |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | static atomic_t count_displays = ATOMIC_INIT(0); |
| 88 | static struct workqueue_struct *wq; |
| 89 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 90 | static void appledisplay_complete(struct urb *urb) |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 91 | { |
| 92 | struct appledisplay *pdata = urb->context; |
Greg Kroah-Hartman | 0a3fd53 | 2012-05-01 21:33:54 -0700 | [diff] [blame] | 93 | struct device *dev = &pdata->udev->dev; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 94 | unsigned long flags; |
Greg Kroah-Hartman | 13f9782 | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 95 | int status = urb->status; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 96 | int retval; |
| 97 | |
Greg Kroah-Hartman | 13f9782 | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 98 | switch (status) { |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 99 | case 0: |
| 100 | /* success */ |
| 101 | break; |
| 102 | case -EOVERFLOW: |
Greg Kroah-Hartman | 0a3fd53 | 2012-05-01 21:33:54 -0700 | [diff] [blame] | 103 | dev_err(dev, |
| 104 | "OVERFLOW with data length %d, actual length is %d\n", |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 105 | ACD_URB_BUFFER_LEN, pdata->urb->actual_length); |
| 106 | case -ECONNRESET: |
| 107 | case -ENOENT: |
| 108 | case -ESHUTDOWN: |
| 109 | /* This urb is terminated, clean up */ |
Greg Kroah-Hartman | 0a3fd53 | 2012-05-01 21:33:54 -0700 | [diff] [blame] | 110 | dev_dbg(dev, "%s - urb shuttingdown with status: %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 111 | __func__, status); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 112 | return; |
| 113 | default: |
Joe Perches | e2b86c1 | 2014-04-24 18:51:02 -0700 | [diff] [blame] | 114 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 115 | __func__, status); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 116 | goto exit; |
| 117 | } |
| 118 | |
| 119 | spin_lock_irqsave(&pdata->lock, flags); |
| 120 | |
| 121 | switch(pdata->urbdata[1]) { |
| 122 | case ACD_BTN_BRIGHT_UP: |
| 123 | case ACD_BTN_BRIGHT_DOWN: |
| 124 | pdata->button_pressed = 1; |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 125 | queue_delayed_work(wq, &pdata->work, 0); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 126 | break; |
| 127 | case ACD_BTN_NONE: |
| 128 | default: |
| 129 | pdata->button_pressed = 0; |
| 130 | break; |
| 131 | } |
| 132 | |
| 133 | spin_unlock_irqrestore(&pdata->lock, flags); |
| 134 | |
| 135 | exit: |
| 136 | retval = usb_submit_urb(pdata->urb, GFP_ATOMIC); |
| 137 | if (retval) { |
Greg Kroah-Hartman | 0a3fd53 | 2012-05-01 21:33:54 -0700 | [diff] [blame] | 138 | dev_err(dev, "%s - usb_submit_urb failed with result %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 139 | __func__, retval); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 140 | } |
| 141 | } |
| 142 | |
| 143 | static int appledisplay_bl_update_status(struct backlight_device *bd) |
| 144 | { |
Richard Purdie | 655bfd7 | 2007-07-09 12:17:24 +0100 | [diff] [blame] | 145 | struct appledisplay *pdata = bl_get_data(bd); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 146 | int retval; |
| 147 | |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 148 | mutex_lock(&pdata->sysfslock); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 149 | pdata->msgdata[0] = 0x10; |
Richard Purdie | 599a52d | 2007-02-10 23:07:48 +0000 | [diff] [blame] | 150 | pdata->msgdata[1] = bd->props.brightness; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 151 | |
| 152 | retval = usb_control_msg( |
| 153 | pdata->udev, |
| 154 | usb_sndctrlpipe(pdata->udev, 0), |
| 155 | USB_REQ_SET_REPORT, |
| 156 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| 157 | ACD_USB_BRIGHTNESS, |
| 158 | 0, |
| 159 | pdata->msgdata, 2, |
| 160 | ACD_USB_TIMEOUT); |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 161 | mutex_unlock(&pdata->sysfslock); |
| 162 | |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 163 | return retval; |
| 164 | } |
| 165 | |
| 166 | static int appledisplay_bl_get_brightness(struct backlight_device *bd) |
| 167 | { |
Richard Purdie | 655bfd7 | 2007-07-09 12:17:24 +0100 | [diff] [blame] | 168 | struct appledisplay *pdata = bl_get_data(bd); |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 169 | int retval, brightness; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 170 | |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 171 | mutex_lock(&pdata->sysfslock); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 172 | retval = usb_control_msg( |
| 173 | pdata->udev, |
| 174 | usb_rcvctrlpipe(pdata->udev, 0), |
| 175 | USB_REQ_GET_REPORT, |
| 176 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| 177 | ACD_USB_BRIGHTNESS, |
| 178 | 0, |
| 179 | pdata->msgdata, 2, |
| 180 | ACD_USB_TIMEOUT); |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 181 | brightness = pdata->msgdata[1]; |
| 182 | mutex_unlock(&pdata->sysfslock); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 183 | |
| 184 | if (retval < 0) |
| 185 | return retval; |
| 186 | else |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 187 | return brightness; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 188 | } |
| 189 | |
Bruno Prémont | cedf8a7 | 2010-02-26 13:02:04 +0100 | [diff] [blame] | 190 | static const struct backlight_ops appledisplay_bl_data = { |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 191 | .get_brightness = appledisplay_bl_get_brightness, |
| 192 | .update_status = appledisplay_bl_update_status, |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 193 | }; |
| 194 | |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 195 | static void appledisplay_work(struct work_struct *work) |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 196 | { |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 197 | struct appledisplay *pdata = |
| 198 | container_of(work, struct appledisplay, work.work); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 199 | int retval; |
| 200 | |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 201 | retval = appledisplay_bl_get_brightness(pdata->bd); |
| 202 | if (retval >= 0) |
Richard Purdie | 599a52d | 2007-02-10 23:07:48 +0000 | [diff] [blame] | 203 | pdata->bd->props.brightness = retval; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 204 | |
| 205 | /* Poll again in about 125ms if there's still a button pressed */ |
| 206 | if (pdata->button_pressed) |
| 207 | schedule_delayed_work(&pdata->work, HZ / 8); |
| 208 | } |
| 209 | |
| 210 | static int appledisplay_probe(struct usb_interface *iface, |
| 211 | const struct usb_device_id *id) |
| 212 | { |
Matthew Garrett | a19a6ee | 2010-02-17 16:39:44 -0500 | [diff] [blame] | 213 | struct backlight_properties props; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 214 | struct appledisplay *pdata; |
| 215 | struct usb_device *udev = interface_to_usbdev(iface); |
| 216 | struct usb_host_interface *iface_desc; |
| 217 | struct usb_endpoint_descriptor *endpoint; |
| 218 | int int_in_endpointAddr = 0; |
| 219 | int i, retval = -ENOMEM, brightness; |
| 220 | char bl_name[20]; |
| 221 | |
| 222 | /* set up the endpoint information */ |
| 223 | /* use only the first interrupt-in endpoint */ |
| 224 | iface_desc = iface->cur_altsetting; |
| 225 | for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) { |
| 226 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 16f9637 | 2006-10-26 13:02:46 -0300 | [diff] [blame] | 227 | if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) { |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 228 | /* we found an interrupt in endpoint */ |
| 229 | int_in_endpointAddr = endpoint->bEndpointAddress; |
| 230 | break; |
| 231 | } |
| 232 | } |
| 233 | if (!int_in_endpointAddr) { |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 234 | dev_err(&iface->dev, "Could not find int-in endpoint\n"); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 235 | return -EIO; |
| 236 | } |
| 237 | |
| 238 | /* allocate memory for our device state and initialize it */ |
| 239 | pdata = kzalloc(sizeof(struct appledisplay), GFP_KERNEL); |
| 240 | if (!pdata) { |
| 241 | retval = -ENOMEM; |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 242 | dev_err(&iface->dev, "Out of memory\n"); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 243 | goto error; |
| 244 | } |
| 245 | |
| 246 | pdata->udev = udev; |
| 247 | |
| 248 | spin_lock_init(&pdata->lock); |
David Howells | 6d5aefb | 2006-12-05 19:36:26 +0000 | [diff] [blame] | 249 | INIT_DELAYED_WORK(&pdata->work, appledisplay_work); |
Oliver Neukum | 552e1f2 | 2014-05-19 13:53:55 +0200 | [diff] [blame] | 250 | mutex_init(&pdata->sysfslock); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 251 | |
| 252 | /* Allocate buffer for control messages */ |
| 253 | pdata->msgdata = kmalloc(ACD_MSG_BUFFER_LEN, GFP_KERNEL); |
| 254 | if (!pdata->msgdata) { |
| 255 | retval = -ENOMEM; |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 256 | dev_err(&iface->dev, |
| 257 | "Allocating buffer for control messages failed\n"); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 258 | goto error; |
| 259 | } |
| 260 | |
| 261 | /* Allocate interrupt URB */ |
| 262 | pdata->urb = usb_alloc_urb(0, GFP_KERNEL); |
| 263 | if (!pdata->urb) { |
| 264 | retval = -ENOMEM; |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 265 | dev_err(&iface->dev, "Allocating URB failed\n"); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 266 | goto error; |
| 267 | } |
| 268 | |
| 269 | /* Allocate buffer for interrupt data */ |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 270 | pdata->urbdata = usb_alloc_coherent(pdata->udev, ACD_URB_BUFFER_LEN, |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 271 | GFP_KERNEL, &pdata->urb->transfer_dma); |
| 272 | if (!pdata->urbdata) { |
| 273 | retval = -ENOMEM; |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 274 | dev_err(&iface->dev, "Allocating URB buffer failed\n"); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 275 | goto error; |
| 276 | } |
| 277 | |
| 278 | /* Configure interrupt URB */ |
| 279 | usb_fill_int_urb(pdata->urb, udev, |
| 280 | usb_rcvintpipe(udev, int_in_endpointAddr), |
| 281 | pdata->urbdata, ACD_URB_BUFFER_LEN, appledisplay_complete, |
| 282 | pdata, 1); |
| 283 | if (usb_submit_urb(pdata->urb, GFP_KERNEL)) { |
| 284 | retval = -EIO; |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 285 | dev_err(&iface->dev, "Submitting URB failed\n"); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 286 | goto error; |
| 287 | } |
| 288 | |
| 289 | /* Register backlight device */ |
| 290 | snprintf(bl_name, sizeof(bl_name), "appledisplay%d", |
| 291 | atomic_inc_return(&count_displays) - 1); |
Matthew Garrett | a19a6ee | 2010-02-17 16:39:44 -0500 | [diff] [blame] | 292 | memset(&props, 0, sizeof(struct backlight_properties)); |
Matthew Garrett | bb7ca74 | 2011-03-22 16:30:21 -0700 | [diff] [blame] | 293 | props.type = BACKLIGHT_RAW; |
Matthew Garrett | a19a6ee | 2010-02-17 16:39:44 -0500 | [diff] [blame] | 294 | props.max_brightness = 0xff; |
Len Brown | 81450b7 | 2007-02-16 18:52:41 -0500 | [diff] [blame] | 295 | pdata->bd = backlight_device_register(bl_name, NULL, pdata, |
Matthew Garrett | a19a6ee | 2010-02-17 16:39:44 -0500 | [diff] [blame] | 296 | &appledisplay_bl_data, &props); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 297 | if (IS_ERR(pdata->bd)) { |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 298 | dev_err(&iface->dev, "Backlight registration failed\n"); |
Bruno Prémont | cedf8a7 | 2010-02-26 13:02:04 +0100 | [diff] [blame] | 299 | retval = PTR_ERR(pdata->bd); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 300 | goto error; |
| 301 | } |
| 302 | |
| 303 | /* Try to get brightness */ |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 304 | brightness = appledisplay_bl_get_brightness(pdata->bd); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 305 | |
| 306 | if (brightness < 0) { |
| 307 | retval = brightness; |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 308 | dev_err(&iface->dev, |
| 309 | "Error while getting initial brightness: %d\n", retval); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 310 | goto error; |
| 311 | } |
| 312 | |
| 313 | /* Set brightness in backlight device */ |
Richard Purdie | 599a52d | 2007-02-10 23:07:48 +0000 | [diff] [blame] | 314 | pdata->bd->props.brightness = brightness; |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 315 | |
| 316 | /* save our data pointer in the interface device */ |
| 317 | usb_set_intfdata(iface, pdata); |
| 318 | |
| 319 | printk(KERN_INFO "appledisplay: Apple Cinema Display connected\n"); |
| 320 | |
| 321 | return 0; |
| 322 | |
| 323 | error: |
| 324 | if (pdata) { |
| 325 | if (pdata->urb) { |
| 326 | usb_kill_urb(pdata->urb); |
| 327 | if (pdata->urbdata) |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 328 | usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN, |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 329 | pdata->urbdata, pdata->urb->transfer_dma); |
| 330 | usb_free_urb(pdata->urb); |
| 331 | } |
Julien Brunel | bedf088 | 2008-09-01 10:57:27 +0200 | [diff] [blame] | 332 | if (pdata->bd && !IS_ERR(pdata->bd)) |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 333 | backlight_device_unregister(pdata->bd); |
| 334 | kfree(pdata->msgdata); |
| 335 | } |
| 336 | usb_set_intfdata(iface, NULL); |
| 337 | kfree(pdata); |
| 338 | return retval; |
| 339 | } |
| 340 | |
| 341 | static void appledisplay_disconnect(struct usb_interface *iface) |
| 342 | { |
| 343 | struct appledisplay *pdata = usb_get_intfdata(iface); |
| 344 | |
| 345 | if (pdata) { |
| 346 | usb_kill_urb(pdata->urb); |
| 347 | cancel_delayed_work(&pdata->work); |
| 348 | backlight_device_unregister(pdata->bd); |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 349 | usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN, |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 350 | pdata->urbdata, pdata->urb->transfer_dma); |
| 351 | usb_free_urb(pdata->urb); |
| 352 | kfree(pdata->msgdata); |
| 353 | kfree(pdata); |
| 354 | } |
| 355 | |
| 356 | printk(KERN_INFO "appledisplay: Apple Cinema Display disconnected\n"); |
| 357 | } |
| 358 | |
| 359 | static struct usb_driver appledisplay_driver = { |
| 360 | .name = "appledisplay", |
| 361 | .probe = appledisplay_probe, |
| 362 | .disconnect = appledisplay_disconnect, |
| 363 | .id_table = appledisplay_table, |
| 364 | }; |
| 365 | |
| 366 | static int __init appledisplay_init(void) |
| 367 | { |
| 368 | wq = create_singlethread_workqueue("appledisplay"); |
| 369 | if (!wq) { |
Greg Kroah-Hartman | fd3f191 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 370 | printk(KERN_ERR "appledisplay: Could not create work queue\n"); |
akpm@osdl.org | 069e8a6 | 2006-05-26 13:17:09 -0700 | [diff] [blame] | 371 | return -ENOMEM; |
| 372 | } |
| 373 | |
| 374 | return usb_register(&appledisplay_driver); |
| 375 | } |
| 376 | |
| 377 | static void __exit appledisplay_exit(void) |
| 378 | { |
| 379 | flush_workqueue(wq); |
| 380 | destroy_workqueue(wq); |
| 381 | usb_deregister(&appledisplay_driver); |
| 382 | } |
| 383 | |
| 384 | MODULE_AUTHOR("Michael Hanselmann"); |
| 385 | MODULE_DESCRIPTION("Apple Cinema Display driver"); |
| 386 | MODULE_LICENSE("GPL"); |
| 387 | |
| 388 | module_init(appledisplay_init); |
| 389 | module_exit(appledisplay_exit); |