SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/em28xx/em28xx-dvb.c

   1 /*
   2  DVB device driver for em28xx
   3
   4  (c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
   5
   6  (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
   7         - Fixes for the driver to properly work with HVR-950
   8
   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]
  12
  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.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/usb.h>
  20
  21 #include "em28xx.h"
  22 #include <media/v4l2-common.h>
  23 #include <media/videobuf-vmalloc.h>
  24
  25 #include "lgdt330x.h"
  26
  27 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
  28 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
  29 MODULE_LICENSE("GPL");
  30
  31 static unsigned int debug;
  32 module_param(debug, int, 0644);
  33 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
  34
  35 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  36
  37 #define dprintk(level, fmt, arg...) do {                        \
  38 if (debug >= level)                                             \
  39         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg)  \
  40 } while (0)
  41
  42 static int
  43 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
  44 {
  45         struct em28xx_fh *fh = vq->priv_data;
  46         struct em28xx        *dev = fh->dev;
  47
  48         /* FIXME: The better would be to allocate a smaller buffer */
  49         *size = 16 * fh->dev->width * fh->dev->height >> 3;
  50         if (0 == *count)
  51                 *count = EM28XX_DEF_BUF;
  52
  53         if (*count < EM28XX_MIN_BUF)
  54                 *count = EM28XX_MIN_BUF;
  55
  56         dev->mode = EM28XX_DIGITAL_MODE;
  57
  58         return 0;
  59 }
  60
  61 /* ------------------------------------------------------------------ */
  62
  63 static struct lgdt330x_config em2880_lgdt3303_dev = {
  64         .demod_address = 0x0e,
  65         .demod_chip = LGDT3303,
  66 };
  67
  68 /* ------------------------------------------------------------------ */
  69
  70 static int attach_xc3028(u8 addr, struct em28xx *dev)
  71 {
  72         struct dvb_frontend *fe;
  73         struct xc2028_ctrl ctl;
  74         struct xc2028_config cfg;
  75
  76         memset (&cfg, 0, sizeof(cfg));
  77         cfg.i2c_adap  = &dev->i2c_adap;
  78         cfg.i2c_addr  = addr;
  79         cfg.ctrl      = &ctl;
  80         cfg.callback  = em28xx_tuner_callback;
  81
  82         em28xx_setup_xc3028(dev, &ctl);
  83
  84         if (!dev->dvb.frontend) {
  85                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
  86                                 "Can't attach xc3028\n",
  87                        dev->name);
  88                 return -EINVAL;
  89         }
  90
  91         fe = dvb_attach(xc2028_attach, dev->dvb.frontend, &cfg);
  92         if (!fe) {
  93                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
  94                        dev->name);
  95                 dvb_frontend_detach(dev->dvb.frontend);
  96                 dvb_unregister_frontend(dev->dvb.frontend);
  97                 dev->dvb.frontend = NULL;
  98                 return -EINVAL;
  99         }
 100
 101         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
 102
 103         return 0;
 104 }
 105
 106 static int dvb_init(struct em28xx *dev)
 107 {
 108         /* init struct videobuf_dvb */
 109         dev->dvb.name = dev->name;
 110
 111         dev->qops->buf_setup = buffer_setup;
 112
 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;
 117
 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);
 123
 124         /* init frontend */
 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);
 130
 131                 dev->dvb.frontend = dvb_attach(lgdt330x_attach,
 132                                                &em2880_lgdt3303_dev,
 133                                                &dev->i2c_adap);
 134                 if (attach_xc3028(0x61, dev) < 0)
 135                         return -EINVAL;
 136                 break;
 137         default:
 138                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 139                                 " isn't supported yet\n",
 140                        dev->name);
 141                 break;
 142         }
 143         if (NULL == dev->dvb.frontend) {
 144                 printk(KERN_ERR
 145                        "%s/2: frontend initialization failed\n",
 146                        dev->name);
 147                 return -EINVAL;
 148         }
 149
 150         /* register everything */
 151         return videobuf_dvb_register(&dev->dvb, THIS_MODULE, dev,
 152                                      &dev->udev->dev,
 153                                      adapter_nr);
 154 }
 155
 156 static int dvb_fini(struct em28xx *dev)
 157 {
 158         if (dev->dvb.frontend)
 159                 videobuf_dvb_unregister(&dev->dvb);
 160
 161         return 0;
 162 }
 163
 164 static struct em28xx_ops dvb_ops = {
 165         .id   = EM28XX_DVB,
 166         .name = "Em28xx dvb Extension",
 167         .init = dvb_init,
 168         .fini = dvb_fini,
 169 };
 170
 171 static int __init em28xx_dvb_register(void)
 172 {
 173         return em28xx_register_extension(&dvb_ops);
 174 }
 175
 176 static void __exit em28xx_dvb_unregister(void)
 177 {
 178         em28xx_unregister_extension(&dvb_ops);
 179 }
 180
 181 module_init(em28xx_dvb_register);
 182 module_exit(em28xx_dvb_unregister);