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.
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/videodev2.h>
25 #include <media/v4l2-common.h>
26 #include <linux/mutex.h>
31 * 1 = General debug messages
37 module_param_named(debug, au0828_debug, int, 0644);
38 MODULE_PARM_DESC(debug, "enable debug messages");
40 static unsigned int disable_usb_speed_check;
41 module_param(disable_usb_speed_check, int, 0444);
42 MODULE_PARM_DESC(disable_usb_speed_check,
43 "override min bandwidth requirement of 480M bps");
45 #define _AU0828_BULKPIPE 0x03
46 #define _BULKPIPESIZE 0xffff
48 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
50 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
51 u16 index, unsigned char *cp, u16 size);
54 #define CMD_REQUEST_IN 0x00
55 #define CMD_REQUEST_OUT 0x01
57 u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
61 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
62 dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
67 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
69 dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
70 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
73 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
80 /* cp must be memory that has been allocated by kmalloc */
81 status = usb_control_msg(dev->usbdev,
82 usb_sndctrlpipe(dev->usbdev, 0),
84 USB_DIR_OUT | USB_TYPE_VENDOR |
86 value, index, NULL, 0, 1000);
88 status = min(status, 0);
91 printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
100 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
101 u16 index, unsigned char *cp, u16 size)
103 int status = -ENODEV;
104 mutex_lock(&dev->mutex);
106 status = usb_control_msg(dev->usbdev,
107 usb_rcvctrlpipe(dev->usbdev, 0),
109 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
111 dev->ctrlmsg, size, 1000);
113 status = min(status, 0);
116 printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
120 /* the host controller requires heap allocated memory, which
121 is why we didn't just pass "cp" into usb_control_msg */
122 memcpy(cp, dev->ctrlmsg, size);
124 mutex_unlock(&dev->mutex);
128 static void au0828_usb_disconnect(struct usb_interface *interface)
130 struct au0828_dev *dev = usb_get_intfdata(interface);
132 dprintk(1, "%s()\n", __func__);
135 au0828_dvb_unregister(dev);
137 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
138 au0828_analog_unregister(dev);
141 au0828_i2c_unregister(dev);
143 v4l2_device_unregister(&dev->v4l2_dev);
145 usb_set_intfdata(interface, NULL);
147 mutex_lock(&dev->mutex);
149 mutex_unlock(&dev->mutex);
155 static int au0828_usb_probe(struct usb_interface *interface,
156 const struct usb_device_id *id)
159 struct au0828_dev *dev;
160 struct usb_device *usbdev = interface_to_usbdev(interface);
162 ifnum = interface->altsetting->desc.bInterfaceNumber;
167 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
168 le16_to_cpu(usbdev->descriptor.idVendor),
169 le16_to_cpu(usbdev->descriptor.idProduct),
173 * Make sure we have 480 Mbps of bandwidth, otherwise things like
174 * video stream wouldn't likely work, since 12 Mbps is generally
175 * not enough even for most Digital TV streams.
177 if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
178 printk(KERN_ERR "au0828: Device initialization failed.\n");
179 printk(KERN_ERR "au0828: Device must be connected to a "
180 "high-speed USB 2.0 port.\n");
184 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
186 printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
190 mutex_init(&dev->lock);
191 mutex_lock(&dev->lock);
192 mutex_init(&dev->mutex);
193 mutex_init(&dev->dvb.lock);
194 dev->usbdev = usbdev;
195 dev->boardnr = id->driver_info;
197 /* Create the v4l2_device */
198 retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
200 printk(KERN_ERR "%s() v4l2_device_register failed\n",
202 mutex_unlock(&dev->lock);
207 /* Power Up the bridge */
208 au0828_write(dev, REG_600, 1 << 4);
210 /* Bring up the GPIO's and supporting devices */
211 au0828_gpio_setup(dev);
214 au0828_i2c_register(dev);
217 au0828_card_setup(dev);
220 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
221 au0828_analog_register(dev, interface);
224 au0828_dvb_register(dev);
226 /* Store the pointer to the au0828_dev so it can be accessed in
227 au0828_usb_disconnect */
228 usb_set_intfdata(interface, dev);
230 printk(KERN_INFO "Registered device AU0828 [%s]\n",
231 dev->board.name == NULL ? "Unset" : dev->board.name);
233 mutex_unlock(&dev->lock);
238 static struct usb_driver au0828_usb_driver = {
240 .probe = au0828_usb_probe,
241 .disconnect = au0828_usb_disconnect,
242 .id_table = au0828_usb_id_table,
245 static int __init au0828_init(void)
249 if (au0828_debug & 1)
250 printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
252 if (au0828_debug & 2)
253 printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
255 if (au0828_debug & 4)
256 printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
258 if (au0828_debug & 8)
259 printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
262 printk(KERN_INFO "au0828 driver loaded\n");
264 ret = usb_register(&au0828_usb_driver);
266 printk(KERN_ERR "usb_register failed, error = %d\n", ret);
271 static void __exit au0828_exit(void)
273 usb_deregister(&au0828_usb_driver);
276 module_init(au0828_init);
277 module_exit(au0828_exit);
279 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
280 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
281 MODULE_LICENSE("GPL");
282 MODULE_VERSION("0.0.2");