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  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include "cx23885.h"
  25 #include "cx23885-ioctl.h"
  26
  27 #ifdef CONFIG_VIDEO_ADV_DEBUG
  28 int cx23885_g_chip_info(struct file *file, void *fh,
  29                          struct v4l2_dbg_chip_info *chip)
  30 {
  31         struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
  32
  33         if (chip->match.addr > 1)
  34                 return -EINVAL;
  35         if (chip->match.addr == 1) {
  36                 if (dev->v4l_device == NULL)
  37                         return -EINVAL;
  38                 strlcpy(chip->name, "cx23417", sizeof(chip->name));
  39         } else {
  40                 strlcpy(chip->name, dev->v4l2_dev.name, sizeof(chip->name));
  41         }
  42         return 0;
  43 }
  44
  45 static int cx23417_g_register(struct cx23885_dev *dev,
  46                               struct v4l2_dbg_register *reg)
  47 {
  48         u32 value;
  49
  50         if (dev->v4l_device == NULL)
  51                 return -EINVAL;
  52
  53         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
  54                 return -EINVAL;
  55
  56         if (mc417_register_read(dev, (u16) reg->reg, &value))
  57                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
  58
  59         reg->size = 4;
  60         reg->val = value;
  61         return 0;
  62 }
  63
  64 int cx23885_g_register(struct file *file, void *fh,
  65                        struct v4l2_dbg_register *reg)
  66 {
  67         struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
  68
  69         if (reg->match.addr > 1)
  70                 return -EINVAL;
  71         if (reg->match.addr)
  72                 return cx23417_g_register(dev, reg);
  73
  74         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
  75                 return -EINVAL;
  76
  77         reg->size = 4;
  78         reg->val = cx_read(reg->reg);
  79         return 0;
  80 }
  81
  82 static int cx23417_s_register(struct cx23885_dev *dev,
  83                               const struct v4l2_dbg_register *reg)
  84 {
  85         if (dev->v4l_device == NULL)
  86                 return -EINVAL;
  87
  88         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
  89                 return -EINVAL;
  90
  91         if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
  92                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
  93         return 0;
  94 }
  95
  96 int cx23885_s_register(struct file *file, void *fh,
  97                        const struct v4l2_dbg_register *reg)
  98 {
  99         struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
 100
 101         if (reg->match.addr > 1)
 102                 return -EINVAL;
 103         if (reg->match.addr)
 104                 return cx23417_s_register(dev, reg);
 105
 106         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
 107                 return -EINVAL;
 108
 109         cx_write(reg->reg, reg->val);
 110         return 0;
 111 }
 112 #endif