diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-dvb.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-dvb.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/media/video/em28xx/em28xx-dvb.c b/drivers/media/video/em28xx/em28xx-dvb.c new file mode 100644 index 00000000000..1ffe64f6209 --- /dev/null +++ b/drivers/media/video/em28xx/em28xx-dvb.c @@ -0,0 +1,157 @@ +/* + DVB device driver for em28xx + + (c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org> + + 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" +#include "tuner-xc2028.h" +#include "tuner-xc2028-types.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; + + *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; +} + +/* ------------------------------------------------------------------ */ + +/* Add demods here */ + +/* ------------------------------------------------------------------ */ + +static int attach_xc3028(u8 addr, struct em28xx *dev) +{ + struct dvb_frontend *fe; + struct xc2028_ctrl ctl; + struct xc2028_config cfg = { + .i2c_adap = &dev->i2c_adap, + .i2c_addr = addr, + .ctrl = &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; + + 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); + + /* init frontend */ + switch (dev->model) { + 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); |