2 * Driver for the Auvitek USB bridge
4 * Copyright (c) 2008 Steven Toth <stoth@hauppauge.com>
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/videodev2.h>
24 #include <media/v4l2-common.h>
25 #include <linux/mutex.h>
30 * 1 = General debug messages
36 module_param(debug, int, 0644);
37 MODULE_PARM_DESC(debug, "enable debug messages");
39 unsigned int usb_debug;
40 module_param(usb_debug, int, 0644);
41 MODULE_PARM_DESC(usb_debug, "enable usb debug messages");
43 unsigned int bridge_debug;
44 module_param(bridge_debug, int, 0644);
45 MODULE_PARM_DESC(bridge_debug, "enable bridge debug messages");
47 #define _AU0828_BULKPIPE 0x03
48 #define _BULKPIPESIZE 0xffff
50 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
51 u16 index, unsigned char *cp, u16 size);
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)
61 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
62 dprintk(8, "%s(0x%x) = 0x%x\n", __func__, reg, dev->ctrlmsg[0]);
63 return dev->ctrlmsg[0];
66 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
68 dprintk(8, "%s(0x%x, 0x%x)\n", __func__, reg, val);
69 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
73 static void cmd_msg_dump(struct au0828_dev *dev)
77 for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
78 dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
79 "%02x %02x %02x %02x %02x %02x %02x %02x\n",
81 dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
82 dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
83 dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
84 dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
85 dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
86 dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
87 dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
88 dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
91 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
92 u16 index, unsigned char *cp, u16 size)
95 mutex_lock(&dev->mutex);
98 /* cp must be memory that has been allocated by kmalloc */
99 status = usb_control_msg(dev->usbdev,
100 usb_sndctrlpipe(dev->usbdev, 0),
102 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
106 status = min(status, 0);
109 printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
114 mutex_unlock(&dev->mutex);
118 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
119 u16 index, unsigned char *cp, u16 size)
121 int status = -ENODEV;
122 mutex_lock(&dev->mutex);
125 memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
127 /* cp must be memory that has been allocated by kmalloc */
128 status = usb_control_msg(dev->usbdev,
129 usb_rcvctrlpipe(dev->usbdev, 0),
131 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
135 status = min(status, 0);
138 printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
143 mutex_unlock(&dev->mutex);
147 static void au0828_usb_disconnect(struct usb_interface *interface)
149 struct au0828_dev *dev = usb_get_intfdata(interface);
151 dprintk(1, "%s()\n", __func__);
154 au0828_dvb_unregister(dev);
157 au0828_i2c_unregister(dev);
159 usb_set_intfdata(interface, NULL);
161 mutex_lock(&dev->mutex);
163 mutex_unlock(&dev->mutex);
169 static int au0828_usb_probe(struct usb_interface *interface,
170 const struct usb_device_id *id)
173 struct au0828_dev *dev;
174 struct usb_device *usbdev = interface_to_usbdev(interface);
176 ifnum = interface->altsetting->desc.bInterfaceNumber;
181 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
182 le16_to_cpu(usbdev->descriptor.idVendor),
183 le16_to_cpu(usbdev->descriptor.idProduct),
186 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
188 printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
192 mutex_init(&dev->mutex);
193 mutex_init(&dev->dvb.lock);
194 dev->usbdev = usbdev;
195 dev->board = id->driver_info;
197 usb_set_intfdata(interface, dev);
199 /* Power Up the bridge */
200 au0828_write(dev, REG_600, 1 << 4);
202 /* Bring up the GPIO's and supporting devices */
203 au0828_gpio_setup(dev);
206 au0828_i2c_register(dev);
209 au0828_card_setup(dev);
212 au0828_dvb_register(dev);
214 printk(KERN_INFO "Registered device AU0828 [%s]\n",
215 au0828_boards[dev->board].name == NULL ? "Unset" :
216 au0828_boards[dev->board].name);
221 static struct usb_driver au0828_usb_driver = {
223 .probe = au0828_usb_probe,
224 .disconnect = au0828_usb_disconnect,
225 .id_table = au0828_usb_id_table,
228 static int __init au0828_init(void)
233 printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
236 printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
241 printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
246 printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
251 printk(KERN_INFO "au0828 driver loaded\n");
253 ret = usb_register(&au0828_usb_driver);
255 printk(KERN_ERR "usb_register failed, error = %d\n", ret);
260 static void __exit au0828_exit(void)
262 usb_deregister(&au0828_usb_driver);
265 module_init(au0828_init);
266 module_exit(au0828_exit);
268 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
269 MODULE_AUTHOR("Steven Toth <stoth@hauppauge.com>");
270 MODULE_LICENSE("GPL");