drivers/media/pci/cx23885/cx23885-ioctl.c

   1 /*
   2  *  Driver for the Conexant CX23885/7/8 PCIe bridge
   3  *
   4  *  Various common ioctl() support functions
   5  *
   6  *  Copyright (c) 2009 Andy Walls <awalls@md.metrocast.net>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *
  17  *  GNU General Public License for more details.
  18  */
  19
  20 #include "cx23885.h"
  21 #include "cx23885-ioctl.h"
  22
  23 #ifdef CONFIG_VIDEO_ADV_DEBUG
  24 int cx23885_g_chip_info(struct file *file, void *fh,
  25                          struct v4l2_dbg_chip_info *chip)
  26 {
  27         struct cx23885_dev *dev = video_drvdata(file);
  28
  29         if (chip->match.addr > 1)
  30                 return -EINVAL;
  31         if (chip->match.addr == 1) {
  32                 if (dev->v4l_device == NULL)
  33                         return -EINVAL;
  34                 strlcpy(chip->name, "cx23417", sizeof(chip->name));
  35         } else {
  36                 strlcpy(chip->name, dev->v4l2_dev.name, sizeof(chip->name));
  37         }
  38         return 0;
  39 }
  40
  41 static int cx23417_g_register(struct cx23885_dev *dev,
  42                               struct v4l2_dbg_register *reg)
  43 {
  44         u32 value;
  45
  46         if (dev->v4l_device == NULL)
  47                 return -EINVAL;
  48
  49         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
  50                 return -EINVAL;
  51
  52         if (mc417_register_read(dev, (u16) reg->reg, &value))
  53                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
  54
  55         reg->size = 4;
  56         reg->val = value;
  57         return 0;
  58 }
  59
  60 int cx23885_g_register(struct file *file, void *fh,
  61                        struct v4l2_dbg_register *reg)
  62 {
  63         struct cx23885_dev *dev = video_drvdata(file);
  64
  65         if (reg->match.addr > 1)
  66                 return -EINVAL;
  67         if (reg->match.addr)
  68                 return cx23417_g_register(dev, reg);
  69
  70         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
  71                 return -EINVAL;
  72
  73         reg->size = 4;
  74         reg->val = cx_read(reg->reg);
  75         return 0;
  76 }
  77
  78 static int cx23417_s_register(struct cx23885_dev *dev,
  79                               const struct v4l2_dbg_register *reg)
  80 {
  81         if (dev->v4l_device == NULL)
  82                 return -EINVAL;
  83
  84         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
  85                 return -EINVAL;
  86
  87         if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
  88                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
  89         return 0;
  90 }
  91
  92 int cx23885_s_register(struct file *file, void *fh,
  93                        const struct v4l2_dbg_register *reg)
  94 {
  95         struct cx23885_dev *dev = video_drvdata(file);
  96
  97         if (reg->match.addr > 1)
  98                 return -EINVAL;
  99         if (reg->match.addr)
 100                 return cx23417_s_register(dev, reg);
 101
 102         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
 103                 return -EINVAL;
 104
 105         cx_write(reg->reg, reg->val);
 106         return 0;
 107 }
 108 #endif