Linux 2.6.34-rc3
[pohmelfs.git] / drivers / media / video / au0828 / au0828-core.c
blob3544a2f12f13a1497f54ca30609a26e8e9ba8a49
1 /*
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>
27 #include "au0828.h"
30 * 1 = General debug messages
31 * 2 = USB handling
32 * 4 = I2C related
33 * 8 = Bridge related
35 int au0828_debug;
36 module_param_named(debug, au0828_debug, int, 0644);
37 MODULE_PARM_DESC(debug, "enable debug messages");
39 static unsigned int disable_usb_speed_check;
40 module_param(disable_usb_speed_check, int, 0444);
41 MODULE_PARM_DESC(disable_usb_speed_check,
42 "override min bandwidth requirement of 480M bps");
44 #define _AU0828_BULKPIPE 0x03
45 #define _BULKPIPESIZE 0xffff
47 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
48 u16 index, unsigned char *cp, u16 size);
49 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
50 u16 index, unsigned char *cp, u16 size);
52 /* USB Direction */
53 #define CMD_REQUEST_IN 0x00
54 #define CMD_REQUEST_OUT 0x01
56 u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
58 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
59 dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, dev->ctrlmsg[0]);
60 return dev->ctrlmsg[0];
63 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
65 dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
66 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
67 dev->ctrlmsg, 0);
70 static void cmd_msg_dump(struct au0828_dev *dev)
72 int i;
74 for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
75 dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
76 "%02x %02x %02x %02x %02x %02x %02x %02x\n",
77 __func__,
78 dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
79 dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
80 dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
81 dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
82 dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
83 dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
84 dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
85 dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
88 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
89 u16 index, unsigned char *cp, u16 size)
91 int status = -ENODEV;
92 mutex_lock(&dev->mutex);
93 if (dev->usbdev) {
95 /* cp must be memory that has been allocated by kmalloc */
96 status = usb_control_msg(dev->usbdev,
97 usb_sndctrlpipe(dev->usbdev, 0),
98 request,
99 USB_DIR_OUT | USB_TYPE_VENDOR |
100 USB_RECIP_DEVICE,
101 value, index,
102 cp, size, 1000);
104 status = min(status, 0);
106 if (status < 0) {
107 printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
108 __func__, status);
112 mutex_unlock(&dev->mutex);
113 return status;
116 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
117 u16 index, unsigned char *cp, u16 size)
119 int status = -ENODEV;
120 mutex_lock(&dev->mutex);
121 if (dev->usbdev) {
123 memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
125 /* cp must be memory that has been allocated by kmalloc */
126 status = usb_control_msg(dev->usbdev,
127 usb_rcvctrlpipe(dev->usbdev, 0),
128 request,
129 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
130 value, index,
131 cp, size, 1000);
133 status = min(status, 0);
135 if (status < 0) {
136 printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
137 __func__, status);
138 } else
139 cmd_msg_dump(dev);
141 mutex_unlock(&dev->mutex);
142 return status;
145 static void au0828_usb_disconnect(struct usb_interface *interface)
147 struct au0828_dev *dev = usb_get_intfdata(interface);
149 dprintk(1, "%s()\n", __func__);
151 /* Digital TV */
152 au0828_dvb_unregister(dev);
154 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
155 au0828_analog_unregister(dev);
157 /* I2C */
158 au0828_i2c_unregister(dev);
160 v4l2_device_unregister(&dev->v4l2_dev);
162 usb_set_intfdata(interface, NULL);
164 mutex_lock(&dev->mutex);
165 dev->usbdev = NULL;
166 mutex_unlock(&dev->mutex);
168 kfree(dev);
172 static int au0828_usb_probe(struct usb_interface *interface,
173 const struct usb_device_id *id)
175 int ifnum, retval;
176 struct au0828_dev *dev;
177 struct usb_device *usbdev = interface_to_usbdev(interface);
179 ifnum = interface->altsetting->desc.bInterfaceNumber;
181 if (ifnum != 0)
182 return -ENODEV;
184 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
185 le16_to_cpu(usbdev->descriptor.idVendor),
186 le16_to_cpu(usbdev->descriptor.idProduct),
187 ifnum);
190 * Make sure we have 480 Mbps of bandwidth, otherwise things like
191 * video stream wouldn't likely work, since 12 Mbps is generally
192 * not enough even for most Digital TV streams.
194 if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
195 printk(KERN_ERR "au0828: Device initialization failed.\n");
196 printk(KERN_ERR "au0828: Device must be connected to a "
197 "high-speed USB 2.0 port.\n");
198 return -ENODEV;
201 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
202 if (dev == NULL) {
203 printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
204 return -ENOMEM;
207 mutex_init(&dev->mutex);
208 mutex_init(&dev->dvb.lock);
209 dev->usbdev = usbdev;
210 dev->boardnr = id->driver_info;
212 /* Create the v4l2_device */
213 retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
214 if (retval) {
215 printk(KERN_ERR "%s() v4l2_device_register failed\n",
216 __func__);
217 kfree(dev);
218 return -EIO;
221 /* Power Up the bridge */
222 au0828_write(dev, REG_600, 1 << 4);
224 /* Bring up the GPIO's and supporting devices */
225 au0828_gpio_setup(dev);
227 /* I2C */
228 au0828_i2c_register(dev);
230 /* Setup */
231 au0828_card_setup(dev);
233 /* Analog TV */
234 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
235 au0828_analog_register(dev, interface);
237 /* Digital TV */
238 au0828_dvb_register(dev);
240 /* Store the pointer to the au0828_dev so it can be accessed in
241 au0828_usb_disconnect */
242 usb_set_intfdata(interface, dev);
244 printk(KERN_INFO "Registered device AU0828 [%s]\n",
245 dev->board.name == NULL ? "Unset" : dev->board.name);
247 return 0;
250 static struct usb_driver au0828_usb_driver = {
251 .name = DRIVER_NAME,
252 .probe = au0828_usb_probe,
253 .disconnect = au0828_usb_disconnect,
254 .id_table = au0828_usb_id_table,
257 static int __init au0828_init(void)
259 int ret;
261 if (au0828_debug & 1)
262 printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
264 if (au0828_debug & 2)
265 printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
267 if (au0828_debug & 4)
268 printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
270 if (au0828_debug & 8)
271 printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
272 __func__);
274 printk(KERN_INFO "au0828 driver loaded\n");
276 ret = usb_register(&au0828_usb_driver);
277 if (ret)
278 printk(KERN_ERR "usb_register failed, error = %d\n", ret);
280 return ret;
283 static void __exit au0828_exit(void)
285 usb_deregister(&au0828_usb_driver);
288 module_init(au0828_init);
289 module_exit(au0828_exit);
291 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
292 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
293 MODULE_LICENSE("GPL");