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
35 unsigned int debug = 0;
36 module_param(debug, int, 0644);
37 MODULE_PARM_DESC(debug, "enable debug messages");
39 unsigned int usb_debug = 0;
40 module_param(usb_debug, int, 0644);
41 MODULE_PARM_DESC(usb_debug, "enable usb debug messages");
43 unsigned int bridge_debug = 0;
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, dev->ctrlmsg, 0);
72 static void cmd_msg_dump(struct au0828_dev *dev)
76 for (i = 0;i < sizeof(dev->ctrlmsg); i+=16)
77 dprintk(2,"%s() %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x "
78 "%02x %02x %02x %02x %02x %02x\n",
80 dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
81 dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
82 dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
83 dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
84 dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
85 dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
86 dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
87 dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
90 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
91 u16 index, unsigned char *cp, u16 size)
94 mutex_lock(&dev->mutex);
97 /* cp must be memory that has been allocated by kmalloc */
98 status = usb_control_msg(dev->usbdev,
99 usb_sndctrlpipe(dev->usbdev, 0),
101 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
105 status = min(status, 0);
108 printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
113 mutex_unlock(&dev->mutex);
117 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
118 u16 index, unsigned char *cp, u16 size)
120 int status = -ENODEV;
121 mutex_lock(&dev->mutex);
124 memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
126 /* cp must be memory that has been allocated by kmalloc */
127 status = usb_control_msg(dev->usbdev,
128 usb_rcvctrlpipe(dev->usbdev, 0),
130 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
134 status = min(status, 0);
137 printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
143 mutex_unlock(&dev->mutex);
146 static void au0828_usb_disconnect(struct usb_interface *interface)
148 struct au0828_dev *dev = usb_get_intfdata(interface);
150 dprintk(1, "%s()\n", __func__);
153 au0828_dvb_unregister(dev);
156 au0828_i2c_unregister(dev);
158 usb_set_intfdata(interface, NULL);
160 mutex_lock(&dev->mutex);
162 mutex_unlock(&dev->mutex);
168 static int au0828_usb_probe (struct usb_interface *interface,
169 const struct usb_device_id *id)
172 struct au0828_dev *dev;
173 struct usb_device *usbdev = interface_to_usbdev(interface);
175 ifnum = interface->altsetting->desc.bInterfaceNumber;
180 dprintk(1,"%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
181 le16_to_cpu(usbdev->descriptor.idVendor),
182 le16_to_cpu(usbdev->descriptor.idProduct),
185 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
187 printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
191 mutex_init(&dev->mutex);
192 mutex_init(&dev->dvb.lock);
193 dev->usbdev = usbdev;
194 dev->board = id->driver_info;
196 usb_set_intfdata(interface, dev);
198 /* Power Up the bridge */
199 au0828_write(dev, REG_600, 1 << 4);
201 /* Bring up the GPIO's and supporting devices */
202 au0828_gpio_setup(dev);
205 au0828_i2c_register(dev);
208 au0828_card_setup(dev);
211 au0828_dvb_register(dev);
213 printk(KERN_INFO "Registered device AU0828 [%s]\n",
214 au0828_boards[dev->board].name == NULL ? "Unset" :
215 au0828_boards[dev->board].name);
220 static struct usb_driver au0828_usb_driver = {
222 .probe = au0828_usb_probe,
223 .disconnect = au0828_usb_disconnect,
224 .id_table = au0828_usb_id_table,
227 static int __init au0828_init(void)
232 printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
235 printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
240 printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
245 printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
250 printk(KERN_INFO "au0828 driver loaded\n");
252 ret = usb_register(&au0828_usb_driver);
254 printk(KERN_ERR "usb_register failed, error = %d\n", ret);
259 static void __exit au0828_exit(void)
261 usb_deregister(&au0828_usb_driver);
264 module_init(au0828_init);
265 module_exit(au0828_exit);
267 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
268 MODULE_AUTHOR("Steven Toth <stoth@hauppauge.com>");
269 MODULE_LICENSE("GPL");