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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Driver for the Conexant CX23885/7/8 PCIe bridge
   4  *
   5  *  Various common ioctl() support functions
   6  *
   7  *  Copyright (c) 2009 Andy Walls <awalls@md.metrocast.net>
   8  */
   9
  10 #include "cx23885.h"
  11 #include "cx23885-ioctl.h"
  12
  13 #ifdef CONFIG_VIDEO_ADV_DEBUG
  14 int cx23885_g_chip_info(struct file *file, void *fh,
  15                          struct v4l2_dbg_chip_info *chip)
  16 {
  17         struct cx23885_dev *dev = video_drvdata(file);
  18
  19         if (chip->match.addr > 1)
  20                 return -EINVAL;
  21         if (chip->match.addr == 1) {
  22                 if (dev->v4l_device == NULL)
  23                         return -EINVAL;
  24                 strscpy(chip->name, "cx23417", sizeof(chip->name));
  25         } else {
  26                 strscpy(chip->name, dev->v4l2_dev.name, sizeof(chip->name));
  27         }
  28         return 0;
  29 }
  30
  31 static int cx23417_g_register(struct cx23885_dev *dev,
  32                               struct v4l2_dbg_register *reg)
  33 {
  34         u32 value;
  35
  36         if (dev->v4l_device == NULL)
  37                 return -EINVAL;
  38
  39         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
  40                 return -EINVAL;
  41
  42         if (mc417_register_read(dev, (u16) reg->reg, &value))
  43                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
  44
  45         reg->size = 4;
  46         reg->val = value;
  47         return 0;
  48 }
  49
  50 int cx23885_g_register(struct file *file, void *fh,
  51                        struct v4l2_dbg_register *reg)
  52 {
  53         struct cx23885_dev *dev = video_drvdata(file);
  54
  55         if (reg->match.addr > 1)
  56                 return -EINVAL;
  57         if (reg->match.addr)
  58                 return cx23417_g_register(dev, reg);
  59
  60         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
  61                 return -EINVAL;
  62
  63         reg->size = 4;
  64         reg->val = cx_read(reg->reg);
  65         return 0;
  66 }
  67
  68 static int cx23417_s_register(struct cx23885_dev *dev,
  69                               const struct v4l2_dbg_register *reg)
  70 {
  71         if (dev->v4l_device == NULL)
  72                 return -EINVAL;
  73
  74         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
  75                 return -EINVAL;
  76
  77         if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
  78                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
  79         return 0;
  80 }
  81
  82 int cx23885_s_register(struct file *file, void *fh,
  83                        const struct v4l2_dbg_register *reg)
  84 {
  85         struct cx23885_dev *dev = video_drvdata(file);
  86
  87         if (reg->match.addr > 1)
  88                 return -EINVAL;
  89         if (reg->match.addr)
  90                 return cx23417_s_register(dev, reg);
  91
  92         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
  93                 return -EINVAL;
  94
  95         cx_write(reg->reg, reg->val);
  96         return 0;
  97 }
  98 #endif