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/videodev2.h>
24 #include <media/v4l2-common.h>
25 #include <linux/mutex.h>
30 * 1 = General debug messages
36 module_param_named(debug, au0828_debug, int, 0644);
37 MODULE_PARM_DESC(debug, "enable debug messages");
39 #define _AU0828_BULKPIPE 0x03
40 #define _BULKPIPESIZE 0xffff
42 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
43 u16 index, unsigned char *cp, u16 size);
44 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
45 u16 index, unsigned char *cp, u16 size);
48 #define CMD_REQUEST_IN 0x00
49 #define CMD_REQUEST_OUT 0x01
51 u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
53 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
54 dprintk(8, "%s(0x%x) = 0x%x\n", __func__, reg, dev->ctrlmsg[0]);
55 return dev->ctrlmsg[0];
58 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
60 dprintk(8, "%s(0x%x, 0x%x)\n", __func__, reg, val);
61 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
65 static void cmd_msg_dump(struct au0828_dev *dev)
69 for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
70 dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
71 "%02x %02x %02x %02x %02x %02x %02x %02x\n",
73 dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
74 dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
75 dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
76 dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
77 dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
78 dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
79 dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
80 dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
83 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
84 u16 index, unsigned char *cp, u16 size)
87 mutex_lock(&dev->mutex);
90 /* cp must be memory that has been allocated by kmalloc */
91 status = usb_control_msg(dev->usbdev,
92 usb_sndctrlpipe(dev->usbdev, 0),
94 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
98 status = min(status, 0);
101 printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
106 mutex_unlock(&dev->mutex);
110 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
111 u16 index, unsigned char *cp, u16 size)
113 int status = -ENODEV;
114 mutex_lock(&dev->mutex);
117 memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
119 /* cp must be memory that has been allocated by kmalloc */
120 status = usb_control_msg(dev->usbdev,
121 usb_rcvctrlpipe(dev->usbdev, 0),
123 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
127 status = min(status, 0);
130 printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
135 mutex_unlock(&dev->mutex);
139 static void au0828_usb_disconnect(struct usb_interface *interface)
141 struct au0828_dev *dev = usb_get_intfdata(interface);
143 dprintk(1, "%s()\n", __func__);
146 au0828_dvb_unregister(dev);
149 au0828_i2c_unregister(dev);
151 usb_set_intfdata(interface, NULL);
153 mutex_lock(&dev->mutex);
155 mutex_unlock(&dev->mutex);
161 static int au0828_usb_probe(struct usb_interface *interface,
162 const struct usb_device_id *id)
165 struct au0828_dev *dev;
166 struct usb_device *usbdev = interface_to_usbdev(interface);
168 ifnum = interface->altsetting->desc.bInterfaceNumber;
173 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
174 le16_to_cpu(usbdev->descriptor.idVendor),
175 le16_to_cpu(usbdev->descriptor.idProduct),
178 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
180 printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
184 mutex_init(&dev->mutex);
185 mutex_init(&dev->dvb.lock);
186 dev->usbdev = usbdev;
187 dev->board = id->driver_info;
189 usb_set_intfdata(interface, dev);
191 /* Power Up the bridge */
192 au0828_write(dev, REG_600, 1 << 4);
194 /* Bring up the GPIO's and supporting devices */
195 au0828_gpio_setup(dev);
198 au0828_i2c_register(dev);
201 au0828_card_setup(dev);
204 au0828_dvb_register(dev);
206 printk(KERN_INFO "Registered device AU0828 [%s]\n",
207 au0828_boards[dev->board].name == NULL ? "Unset" :
208 au0828_boards[dev->board].name);
213 static struct usb_driver au0828_usb_driver = {
215 .probe = au0828_usb_probe,
216 .disconnect = au0828_usb_disconnect,
217 .id_table = au0828_usb_id_table,
220 static int __init au0828_init(void)
224 if (au0828_debug & 1)
225 printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
227 if (au0828_debug & 2)
228 printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
230 if (au0828_debug & 4)
231 printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
233 if (au0828_debug & 8)
234 printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
237 printk(KERN_INFO "au0828 driver loaded\n");
239 ret = usb_register(&au0828_usb_driver);
241 printk(KERN_ERR "usb_register failed, error = %d\n", ret);
246 static void __exit au0828_exit(void)
248 usb_deregister(&au0828_usb_driver);
251 module_init(au0828_init);
252 module_exit(au0828_exit);
254 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
255 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
256 MODULE_LICENSE("GPL");