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/*
DVB device driver for em28xx
(c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
(c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
- Fixes for the driver to properly work with HVR-950
Based on cx88-dvb and saa7134-dvb originally written by:
(c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
(c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License.
*/
#include <linux/kernel.h>
#include <linux/usb.h>
#include "em28xx.h"
#include <media/v4l2-common.h>
#include <media/videobuf-vmalloc.h>
#include "lgdt330x.h"
MODULE_DESCRIPTION("driver for em28xx based DVB cards");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_LICENSE("GPL");
static unsigned int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
#define dprintk(level, fmt, arg...) do { \
if (debug >= level) \
printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg) \
} while (0)
static int
buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
{
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = fh->dev;
/* FIXME: The better would be to allocate a smaller buffer */
*size = 16 * fh->dev->width * fh->dev->height >> 3;
if (0 == *count)
*count = EM28XX_DEF_BUF;
if (*count < EM28XX_MIN_BUF)
*count = EM28XX_MIN_BUF;
dev->mode = EM28XX_DIGITAL_MODE;
return 0;
}
/* ------------------------------------------------------------------ */
static struct lgdt330x_config em2880_lgdt3303_dev = {
.demod_address = 0x0e,
.demod_chip = LGDT3303,
};
/* ------------------------------------------------------------------ */
static int attach_xc3028(u8 addr, struct em28xx *dev)
{
struct dvb_frontend *fe;
struct xc2028_ctrl ctl;
struct xc2028_config cfg;
memset (&cfg, 0, sizeof(cfg));
cfg.i2c_adap = &dev->i2c_adap;
cfg.i2c_addr = addr;
cfg.ctrl = &ctl;
cfg.callback = em28xx_tuner_callback;
em28xx_setup_xc3028(dev, &ctl);
if (!dev->dvb.frontend) {
printk(KERN_ERR "%s/2: dvb frontend not attached. "
"Can't attach xc3028\n",
dev->name);
return -EINVAL;
}
fe = dvb_attach(xc2028_attach, dev->dvb.frontend, &cfg);
if (!fe) {
printk(KERN_ERR "%s/2: xc3028 attach failed\n",
dev->name);
dvb_frontend_detach(dev->dvb.frontend);
dvb_unregister_frontend(dev->dvb.frontend);
dev->dvb.frontend = NULL;
return -EINVAL;
}
printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
return 0;
}
static int dvb_init(struct em28xx *dev)
{
/* init struct videobuf_dvb */
dev->dvb.name = dev->name;
dev->qops->buf_setup = buffer_setup;
/* FIXME: Do we need more initialization here? */
memset(&dev->dvb_fh, 0, sizeof (dev->dvb_fh));
dev->dvb_fh.dev = dev;
dev->dvb_fh.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
videobuf_queue_vmalloc_init(&dev->dvb.dvbq, dev->qops,
&dev->udev->dev, &dev->slock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_ALTERNATE,
sizeof(struct em28xx_buffer), &dev->dvb_fh);
/* init frontend */
switch (dev->model) {
case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
/* Enable lgdt330x */
dev->mode = EM28XX_DIGITAL_MODE;
em28xx_tuner_callback(dev, XC2028_TUNER_RESET, 0);
dev->dvb.frontend = dvb_attach(lgdt330x_attach,
&em2880_lgdt3303_dev,
&dev->i2c_adap);
if (attach_xc3028(0x61, dev) < 0)
return -EINVAL;
break;
default:
printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
" isn't supported yet\n",
dev->name);
break;
}
if (NULL == dev->dvb.frontend) {
printk(KERN_ERR
"%s/2: frontend initialization failed\n",
dev->name);
return -EINVAL;
}
/* register everything */
return videobuf_dvb_register(&dev->dvb, THIS_MODULE, dev,
&dev->udev->dev,
adapter_nr);
}
static int dvb_fini(struct em28xx *dev)
{
if (dev->dvb.frontend)
videobuf_dvb_unregister(&dev->dvb);
return 0;
}
static struct em28xx_ops dvb_ops = {
.id = EM28XX_DVB,
.name = "Em28xx dvb Extension",
.init = dvb_init,
.fini = dvb_fini,
};
static int __init em28xx_dvb_register(void)
{
return em28xx_register_extension(&dvb_ops);
}
static void __exit em28xx_dvb_unregister(void)
{
em28xx_unregister_extension(&dvb_ops);
}
module_init(em28xx_dvb_register);
module_exit(em28xx_dvb_unregister);
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