2 * Driver for the Auvitek USB bridge
4 * Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <linux/videodev2.h>
27 #include <media/v4l2-common.h>
28 #include <linux/mutex.h>
30 /* Due to enum tuner_pad_index */
31 #include <media/tuner.h>
34 * 1 = General debug messages
41 module_param_named(debug, au0828_debug, int, 0644);
42 MODULE_PARM_DESC(debug,
43 "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR");
45 static unsigned int disable_usb_speed_check;
46 module_param(disable_usb_speed_check, int, 0444);
47 MODULE_PARM_DESC(disable_usb_speed_check,
48 "override min bandwidth requirement of 480M bps");
50 #define _AU0828_BULKPIPE 0x03
51 #define _BULKPIPESIZE 0xffff
53 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
55 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
56 u16 index, unsigned char *cp, u16 size);
59 #define CMD_REQUEST_IN 0x00
60 #define CMD_REQUEST_OUT 0x01
62 u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
66 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
67 dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
72 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
74 dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
75 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
78 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
85 /* cp must be memory that has been allocated by kmalloc */
86 status = usb_control_msg(dev->usbdev,
87 usb_sndctrlpipe(dev->usbdev, 0),
89 USB_DIR_OUT | USB_TYPE_VENDOR |
91 value, index, NULL, 0, 1000);
93 status = min(status, 0);
96 pr_err("%s() Failed sending control message, error %d.\n",
105 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
106 u16 index, unsigned char *cp, u16 size)
108 int status = -ENODEV;
109 mutex_lock(&dev->mutex);
111 status = usb_control_msg(dev->usbdev,
112 usb_rcvctrlpipe(dev->usbdev, 0),
114 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
116 dev->ctrlmsg, size, 1000);
118 status = min(status, 0);
121 pr_err("%s() Failed receiving control message, error %d.\n",
125 /* the host controller requires heap allocated memory, which
126 is why we didn't just pass "cp" into usb_control_msg */
127 memcpy(cp, dev->ctrlmsg, size);
129 mutex_unlock(&dev->mutex);
133 static void au0828_unregister_media_device(struct au0828_dev *dev)
136 #ifdef CONFIG_MEDIA_CONTROLLER
137 if (dev->media_dev) {
138 media_device_unregister(dev->media_dev);
139 media_device_cleanup(dev->media_dev);
140 kfree(dev->media_dev);
141 dev->media_dev = NULL;
146 void au0828_usb_release(struct au0828_dev *dev)
148 au0828_unregister_media_device(dev);
151 au0828_i2c_unregister(dev);
156 static void au0828_usb_disconnect(struct usb_interface *interface)
158 struct au0828_dev *dev = usb_get_intfdata(interface);
160 dprintk(1, "%s()\n", __func__);
162 /* there is a small window after disconnect, before
163 dev->usbdev is NULL, for poll (e.g: IR) try to access
164 the device and fill the dmesg with error messages.
165 Set the status so poll routines can check and avoid
166 access after disconnect.
168 dev->dev_state = DEV_DISCONNECTED;
170 au0828_rc_unregister(dev);
172 au0828_dvb_unregister(dev);
174 usb_set_intfdata(interface, NULL);
175 mutex_lock(&dev->mutex);
177 mutex_unlock(&dev->mutex);
178 if (au0828_analog_unregister(dev)) {
180 * No need to call au0828_usb_release() if V4L2 is enabled,
181 * as this is already called via au0828_usb_v4l2_release()
185 au0828_usb_release(dev);
188 static int au0828_media_device_init(struct au0828_dev *dev,
189 struct usb_device *udev)
191 #ifdef CONFIG_MEDIA_CONTROLLER
192 struct media_device *mdev;
194 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
198 if (!dev->board.name)
199 media_device_usb_init(mdev, udev, "unknown au0828");
201 media_device_usb_init(mdev, udev, dev->board.name);
203 dev->media_dev = mdev;
209 static int au0828_usb_probe(struct usb_interface *interface,
210 const struct usb_device_id *id)
215 struct au0828_dev *dev;
216 struct usb_device *usbdev = interface_to_usbdev(interface);
218 ifnum = interface->altsetting->desc.bInterfaceNumber;
223 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
224 le16_to_cpu(usbdev->descriptor.idVendor),
225 le16_to_cpu(usbdev->descriptor.idProduct),
229 * Make sure we have 480 Mbps of bandwidth, otherwise things like
230 * video stream wouldn't likely work, since 12 Mbps is generally
231 * not enough even for most Digital TV streams.
233 if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
234 pr_err("au0828: Device initialization failed.\n");
235 pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n");
239 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
241 pr_err("%s() Unable to allocate memory\n", __func__);
245 mutex_init(&dev->lock);
246 mutex_lock(&dev->lock);
247 mutex_init(&dev->mutex);
248 mutex_init(&dev->dvb.lock);
249 dev->usbdev = usbdev;
250 dev->boardnr = id->driver_info;
251 dev->board = au0828_boards[dev->boardnr];
253 /* Initialize the media controller */
254 retval = au0828_media_device_init(dev, usbdev);
256 pr_err("%s() au0828_media_device_init failed\n",
258 mutex_unlock(&dev->lock);
263 retval = au0828_v4l2_device_register(interface, dev);
265 au0828_usb_v4l2_media_release(dev);
266 mutex_unlock(&dev->lock);
271 /* Power Up the bridge */
272 au0828_write(dev, REG_600, 1 << 4);
274 /* Bring up the GPIO's and supporting devices */
275 au0828_gpio_setup(dev);
278 au0828_i2c_register(dev);
281 au0828_card_setup(dev);
284 retval = au0828_analog_register(dev, interface);
286 pr_err("%s() au0282_dev_register failed to register on V4L2\n",
292 retval = au0828_dvb_register(dev);
294 pr_err("%s() au0282_dev_register failed\n",
297 /* Remote controller */
298 au0828_rc_register(dev);
301 * Store the pointer to the au0828_dev so it can be accessed in
302 * au0828_usb_disconnect
304 usb_set_intfdata(interface, dev);
306 pr_info("Registered device AU0828 [%s]\n",
307 dev->board.name == NULL ? "Unset" : dev->board.name);
309 mutex_unlock(&dev->lock);
311 #ifdef CONFIG_MEDIA_CONTROLLER
312 retval = media_device_register(dev->media_dev);
317 au0828_usb_disconnect(interface);
322 static int au0828_suspend(struct usb_interface *interface,
323 pm_message_t message)
325 struct au0828_dev *dev = usb_get_intfdata(interface);
330 pr_info("Suspend\n");
332 au0828_rc_suspend(dev);
333 au0828_v4l2_suspend(dev);
334 au0828_dvb_suspend(dev);
336 /* FIXME: should suspend also ATV/DTV */
341 static int au0828_resume(struct usb_interface *interface)
343 struct au0828_dev *dev = usb_get_intfdata(interface);
349 /* Power Up the bridge */
350 au0828_write(dev, REG_600, 1 << 4);
352 /* Bring up the GPIO's and supporting devices */
353 au0828_gpio_setup(dev);
355 au0828_rc_resume(dev);
356 au0828_v4l2_resume(dev);
357 au0828_dvb_resume(dev);
359 /* FIXME: should resume also ATV/DTV */
364 static struct usb_driver au0828_usb_driver = {
365 .name = KBUILD_MODNAME,
366 .probe = au0828_usb_probe,
367 .disconnect = au0828_usb_disconnect,
368 .id_table = au0828_usb_id_table,
369 .suspend = au0828_suspend,
370 .resume = au0828_resume,
371 .reset_resume = au0828_resume,
374 static int __init au0828_init(void)
378 if (au0828_debug & 1)
379 pr_info("%s() Debugging is enabled\n", __func__);
381 if (au0828_debug & 2)
382 pr_info("%s() USB Debugging is enabled\n", __func__);
384 if (au0828_debug & 4)
385 pr_info("%s() I2C Debugging is enabled\n", __func__);
387 if (au0828_debug & 8)
388 pr_info("%s() Bridge Debugging is enabled\n",
391 if (au0828_debug & 16)
392 pr_info("%s() IR Debugging is enabled\n",
395 pr_info("au0828 driver loaded\n");
397 ret = usb_register(&au0828_usb_driver);
399 pr_err("usb_register failed, error = %d\n", ret);
404 static void __exit au0828_exit(void)
406 usb_deregister(&au0828_usb_driver);
409 module_init(au0828_init);
410 module_exit(au0828_exit);
412 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
413 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
414 MODULE_LICENSE("GPL");
415 MODULE_VERSION("0.0.3");