2 DVB device driver for em28xx
4 (c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
6 (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
7 - Fixes for the driver to properly work with HVR-950
9 Based on cx88-dvb and saa7134-dvb originally written by:
10 (c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
11 (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License.
18 #include <linux/kernel.h>
19 #include <linux/usb.h>
22 #include <media/v4l2-common.h>
23 #include <media/videobuf-vmalloc.h>
27 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
28 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
29 MODULE_LICENSE("GPL");
31 static unsigned int debug;
32 module_param(debug, int, 0644);
33 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
35 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
37 #define dprintk(level, fmt, arg...) do { \
39 printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg) \
43 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
45 struct em28xx_fh *fh = vq->priv_data;
46 struct em28xx *dev = fh->dev;
48 /* FIXME: The better would be to allocate a smaller buffer */
49 *size = 16 * fh->dev->width * fh->dev->height >> 3;
51 *count = EM28XX_DEF_BUF;
53 if (*count < EM28XX_MIN_BUF)
54 *count = EM28XX_MIN_BUF;
56 dev->mode = EM28XX_DIGITAL_MODE;
61 /* ------------------------------------------------------------------ */
63 static struct lgdt330x_config em2880_lgdt3303_dev = {
64 .demod_address = 0x0e,
65 .demod_chip = LGDT3303,
68 /* ------------------------------------------------------------------ */
70 static int attach_xc3028(u8 addr, struct em28xx *dev)
72 struct dvb_frontend *fe;
73 struct xc2028_ctrl ctl;
74 struct xc2028_config cfg;
76 memset (&cfg, 0, sizeof(cfg));
77 cfg.i2c_adap = &dev->i2c_adap;
80 cfg.callback = em28xx_tuner_callback;
82 em28xx_setup_xc3028(dev, &ctl);
84 if (!dev->dvb.frontend) {
85 printk(KERN_ERR "%s/2: dvb frontend not attached. "
86 "Can't attach xc3028\n",
91 fe = dvb_attach(xc2028_attach, dev->dvb.frontend, &cfg);
93 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
95 dvb_frontend_detach(dev->dvb.frontend);
96 dvb_unregister_frontend(dev->dvb.frontend);
97 dev->dvb.frontend = NULL;
101 printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
106 static int dvb_init(struct em28xx *dev)
108 /* init struct videobuf_dvb */
109 dev->dvb.name = dev->name;
111 dev->qops->buf_setup = buffer_setup;
113 /* FIXME: Do we need more initialization here? */
114 memset(&dev->dvb_fh, 0, sizeof (dev->dvb_fh));
115 dev->dvb_fh.dev = dev;
116 dev->dvb_fh.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
118 videobuf_queue_vmalloc_init(&dev->dvb.dvbq, dev->qops,
119 &dev->udev->dev, &dev->slock,
120 V4L2_BUF_TYPE_VIDEO_CAPTURE,
121 V4L2_FIELD_ALTERNATE,
122 sizeof(struct em28xx_buffer), &dev->dvb_fh);
125 switch (dev->model) {
126 case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
127 /* Enable lgdt330x */
128 dev->mode = EM28XX_DIGITAL_MODE;
129 em28xx_tuner_callback(dev, XC2028_TUNER_RESET, 0);
131 dev->dvb.frontend = dvb_attach(lgdt330x_attach,
132 &em2880_lgdt3303_dev,
134 if (attach_xc3028(0x61, dev) < 0)
138 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
139 " isn't supported yet\n",
143 if (NULL == dev->dvb.frontend) {
145 "%s/2: frontend initialization failed\n",
150 /* register everything */
151 return videobuf_dvb_register(&dev->dvb, THIS_MODULE, dev,
156 static int dvb_fini(struct em28xx *dev)
158 if (dev->dvb.frontend)
159 videobuf_dvb_unregister(&dev->dvb);
164 static struct em28xx_ops dvb_ops = {
166 .name = "Em28xx dvb Extension",
171 static int __init em28xx_dvb_register(void)
173 return em28xx_register_extension(&dvb_ops);
176 static void __exit em28xx_dvb_unregister(void)
178 em28xx_unregister_extension(&dvb_ops);
181 module_init(em28xx_dvb_register);
182 module_exit(em28xx_dvb_unregister);