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 |
99 status = min(status, 0);
102 printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
107 mutex_unlock(&dev->mutex);
111 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
112 u16 index, unsigned char *cp, u16 size)
114 int status = -ENODEV;
115 mutex_lock(&dev->mutex);
118 memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
120 /* cp must be memory that has been allocated by kmalloc */
121 status = usb_control_msg(dev->usbdev,
122 usb_rcvctrlpipe(dev->usbdev, 0),
124 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
128 status = min(status, 0);
131 printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
136 mutex_unlock(&dev->mutex);
140 static void au0828_usb_disconnect(struct usb_interface *interface)
142 struct au0828_dev *dev = usb_get_intfdata(interface);
144 dprintk(1, "%s()\n", __func__);
147 au0828_dvb_unregister(dev);
149 au0828_analog_unregister(dev);
152 au0828_i2c_unregister(dev);
154 usb_set_intfdata(interface, NULL);
156 mutex_lock(&dev->mutex);
158 mutex_unlock(&dev->mutex);
164 static int au0828_usb_probe(struct usb_interface *interface,
165 const struct usb_device_id *id)
168 struct au0828_dev *dev;
169 struct usb_device *usbdev = interface_to_usbdev(interface);
170 struct usb_host_interface *iface_desc;
171 struct usb_endpoint_descriptor *endpoint;
173 ifnum = interface->altsetting->desc.bInterfaceNumber;
178 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
179 le16_to_cpu(usbdev->descriptor.idVendor),
180 le16_to_cpu(usbdev->descriptor.idProduct),
183 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
185 printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
189 mutex_init(&dev->mutex);
190 mutex_init(&dev->dvb.lock);
191 dev->usbdev = usbdev;
192 dev->board = id->driver_info;
194 usb_set_intfdata(interface, dev);
196 /* set au0828 usb interface0 to as5 */
197 usb_set_interface(usbdev,
198 interface->cur_altsetting->desc.bInterfaceNumber, 5);
200 /* Figure out which endpoint has the isoc interface */
201 iface_desc = interface->cur_altsetting;
202 for(i = 0; i < iface_desc->desc.bNumEndpoints; i++){
203 endpoint = &iface_desc->endpoint[i].desc;
204 if(((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) &&
205 ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)){
207 /* we find our isoc in endpoint */
208 u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
209 dev->max_pkt_size = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
210 dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
213 if(!(dev->isoc_in_endpointaddr)) {
214 printk("Could not locate isoc endpoint\n");
220 /* Power Up the bridge */
221 au0828_write(dev, REG_600, 1 << 4);
223 /* Bring up the GPIO's and supporting devices */
224 au0828_gpio_setup(dev);
227 au0828_i2c_register(dev);
230 au0828_card_setup(dev);
233 au0828_analog_register(dev);
236 au0828_dvb_register(dev);
238 printk(KERN_INFO "Registered device AU0828 [%s]\n",
239 au0828_boards[dev->board].name == NULL ? "Unset" :
240 au0828_boards[dev->board].name);
245 static struct usb_driver au0828_usb_driver = {
247 .probe = au0828_usb_probe,
248 .disconnect = au0828_usb_disconnect,
249 .id_table = au0828_usb_id_table,
252 static int __init au0828_init(void)
256 if (au0828_debug & 1)
257 printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
259 if (au0828_debug & 2)
260 printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
262 if (au0828_debug & 4)
263 printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
265 if (au0828_debug & 8)
266 printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
269 printk(KERN_INFO "au0828 driver loaded\n");
271 ret = usb_register(&au0828_usb_driver);
273 printk(KERN_ERR "usb_register failed, error = %d\n", ret);
278 static void __exit au0828_exit(void)
280 usb_deregister(&au0828_usb_driver);
283 module_init(au0828_init);
284 module_exit(au0828_exit);
286 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
287 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
288 MODULE_LICENSE("GPL");