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>
31 * 1 = General debug messages
38 module_param_named(debug, au0828_debug, int, 0644);
39 MODULE_PARM_DESC(debug,
40 "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR");
42 static unsigned int disable_usb_speed_check;
43 module_param(disable_usb_speed_check, int, 0444);
44 MODULE_PARM_DESC(disable_usb_speed_check,
45 "override min bandwidth requirement of 480M bps");
47 #define _AU0828_BULKPIPE 0x03
48 #define _BULKPIPESIZE 0xffff
50 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
52 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
53 u16 index, unsigned char *cp, u16 size);
56 #define CMD_REQUEST_IN 0x00
57 #define CMD_REQUEST_OUT 0x01
59 u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
63 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
64 dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
69 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
71 dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
72 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
75 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
82 /* cp must be memory that has been allocated by kmalloc */
83 status = usb_control_msg(dev->usbdev,
84 usb_sndctrlpipe(dev->usbdev, 0),
86 USB_DIR_OUT | USB_TYPE_VENDOR |
88 value, index, NULL, 0, 1000);
90 status = min(status, 0);
93 pr_err("%s() Failed sending control message, error %d.\n",
102 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
103 u16 index, unsigned char *cp, u16 size)
105 int status = -ENODEV;
106 mutex_lock(&dev->mutex);
108 status = usb_control_msg(dev->usbdev,
109 usb_rcvctrlpipe(dev->usbdev, 0),
111 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
113 dev->ctrlmsg, size, 1000);
115 status = min(status, 0);
118 pr_err("%s() Failed receiving control message, error %d.\n",
122 /* the host controller requires heap allocated memory, which
123 is why we didn't just pass "cp" into usb_control_msg */
124 memcpy(cp, dev->ctrlmsg, size);
126 mutex_unlock(&dev->mutex);
130 static void au0828_usb_release(struct au0828_dev *dev)
133 au0828_i2c_unregister(dev);
138 #ifdef CONFIG_VIDEO_AU0828_V4L2
139 static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
141 struct au0828_dev *dev =
142 container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
144 v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
145 v4l2_device_unregister(&dev->v4l2_dev);
146 au0828_usb_release(dev);
150 static void au0828_usb_disconnect(struct usb_interface *interface)
152 struct au0828_dev *dev = usb_get_intfdata(interface);
154 dprintk(1, "%s()\n", __func__);
156 /* there is a small window after disconnect, before
157 dev->usbdev is NULL, for poll (e.g: IR) try to access
158 the device and fill the dmesg with error messages.
159 Set the status so poll routines can check and avoid
160 access after disconnect.
162 set_bit(DEV_DISCONNECTED, &dev->dev_state);
164 au0828_rc_unregister(dev);
166 au0828_dvb_unregister(dev);
168 usb_set_intfdata(interface, NULL);
169 mutex_lock(&dev->mutex);
171 mutex_unlock(&dev->mutex);
172 #ifdef CONFIG_VIDEO_AU0828_V4L2
173 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) {
174 au0828_analog_unregister(dev);
175 v4l2_device_disconnect(&dev->v4l2_dev);
176 v4l2_device_put(&dev->v4l2_dev);
180 au0828_usb_release(dev);
183 static int au0828_usb_probe(struct usb_interface *interface,
184 const struct usb_device_id *id)
189 struct au0828_dev *dev;
190 struct usb_device *usbdev = interface_to_usbdev(interface);
192 ifnum = interface->altsetting->desc.bInterfaceNumber;
197 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
198 le16_to_cpu(usbdev->descriptor.idVendor),
199 le16_to_cpu(usbdev->descriptor.idProduct),
203 * Make sure we have 480 Mbps of bandwidth, otherwise things like
204 * video stream wouldn't likely work, since 12 Mbps is generally
205 * not enough even for most Digital TV streams.
207 if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
208 pr_err("au0828: Device initialization failed.\n");
209 pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n");
213 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
215 pr_err("%s() Unable to allocate memory\n", __func__);
219 mutex_init(&dev->lock);
220 mutex_lock(&dev->lock);
221 mutex_init(&dev->mutex);
222 mutex_init(&dev->dvb.lock);
223 dev->usbdev = usbdev;
224 dev->boardnr = id->driver_info;
225 dev->board = au0828_boards[dev->boardnr];
228 #ifdef CONFIG_VIDEO_AU0828_V4L2
229 dev->v4l2_dev.release = au0828_usb_v4l2_release;
231 /* Create the v4l2_device */
232 retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
234 pr_err("%s() v4l2_device_register failed\n",
236 mutex_unlock(&dev->lock);
240 /* This control handler will inherit the controls from au8522 */
241 retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
243 pr_err("%s() v4l2_ctrl_handler_init failed\n",
245 mutex_unlock(&dev->lock);
249 dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
252 /* Power Up the bridge */
253 au0828_write(dev, REG_600, 1 << 4);
255 /* Bring up the GPIO's and supporting devices */
256 au0828_gpio_setup(dev);
259 au0828_i2c_register(dev);
262 au0828_card_setup(dev);
264 #ifdef CONFIG_VIDEO_AU0828_V4L2
266 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
267 au0828_analog_register(dev, interface);
271 retval = au0828_dvb_register(dev);
273 pr_err("%s() au0282_dev_register failed\n",
276 /* Remote controller */
277 au0828_rc_register(dev);
280 * Store the pointer to the au0828_dev so it can be accessed in
281 * au0828_usb_disconnect
283 usb_set_intfdata(interface, dev);
285 pr_info("Registered device AU0828 [%s]\n",
286 dev->board.name == NULL ? "Unset" : dev->board.name);
288 mutex_unlock(&dev->lock);
293 static int au0828_suspend(struct usb_interface *interface,
294 pm_message_t message)
296 struct au0828_dev *dev = usb_get_intfdata(interface);
301 pr_info("Suspend\n");
303 au0828_rc_suspend(dev);
304 au0828_v4l2_suspend(dev);
305 au0828_dvb_suspend(dev);
307 /* FIXME: should suspend also ATV/DTV */
312 static int au0828_resume(struct usb_interface *interface)
314 struct au0828_dev *dev = usb_get_intfdata(interface);
320 /* Power Up the bridge */
321 au0828_write(dev, REG_600, 1 << 4);
323 /* Bring up the GPIO's and supporting devices */
324 au0828_gpio_setup(dev);
326 au0828_rc_resume(dev);
327 au0828_v4l2_resume(dev);
328 au0828_dvb_resume(dev);
330 /* FIXME: should resume also ATV/DTV */
335 static struct usb_driver au0828_usb_driver = {
336 .name = KBUILD_MODNAME,
337 .probe = au0828_usb_probe,
338 .disconnect = au0828_usb_disconnect,
339 .id_table = au0828_usb_id_table,
340 .suspend = au0828_suspend,
341 .resume = au0828_resume,
342 .reset_resume = au0828_resume,
345 static int __init au0828_init(void)
349 if (au0828_debug & 1)
350 pr_info("%s() Debugging is enabled\n", __func__);
352 if (au0828_debug & 2)
353 pr_info("%s() USB Debugging is enabled\n", __func__);
355 if (au0828_debug & 4)
356 pr_info("%s() I2C Debugging is enabled\n", __func__);
358 if (au0828_debug & 8)
359 pr_info("%s() Bridge Debugging is enabled\n",
362 if (au0828_debug & 16)
363 pr_info("%s() IR Debugging is enabled\n",
366 pr_info("au0828 driver loaded\n");
368 ret = usb_register(&au0828_usb_driver);
370 pr_err("usb_register failed, error = %d\n", ret);
375 static void __exit au0828_exit(void)
377 usb_deregister(&au0828_usb_driver);
380 module_init(au0828_init);
381 module_exit(au0828_exit);
383 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
384 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
385 MODULE_LICENSE("GPL");
386 MODULE_VERSION("0.0.3");