drivers/media/video/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@radix.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 <media/v4l2-chip-ident.h>
  26
  27 int cx23885_g_chip_ident(struct file *file, void *fh,
  28                          struct v4l2_dbg_chip_ident *chip)
  29 {
  30         struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
  31         int err = 0;
  32         u8 rev;
  33
  34         chip->ident = V4L2_IDENT_NONE;
  35         chip->revision = 0;
  36         switch (chip->match.type) {
  37         case V4L2_CHIP_MATCH_HOST:
  38                 switch (chip->match.addr) {
  39                 case 0:
  40                         rev = cx_read(RDR_CFG2) & 0xff;
  41                         switch (dev->pci->device) {
  42                         case 0x8852:
  43                                 /* rev 0x04 could be '885 or '888. Pick '888. */
  44                                 if (rev == 0x04)
  45                                         chip->ident = V4L2_IDENT_CX23888;
  46                                 else
  47                                         chip->ident = V4L2_IDENT_CX23885;
  48                                 break;
  49                         case 0x8880:
  50                                 if (rev == 0x0e || rev == 0x0f)
  51                                         chip->ident = V4L2_IDENT_CX23887;
  52                                 else
  53                                         chip->ident = V4L2_IDENT_CX23888;
  54                                 break;
  55                         default:
  56                                 chip->ident = V4L2_IDENT_UNKNOWN;
  57                                 break;
  58                         }
  59                         chip->revision = (dev->pci->device << 16) | (rev << 8) |
  60                                          (dev->hwrevision & 0xff);
  61                         break;
  62                 case 1:
  63                         if (dev->v4l_device != NULL) {
  64                                 chip->ident = V4L2_IDENT_CX23417;
  65                                 chip->revision = 0;
  66                         }
  67                         break;
  68                 case 2:
  69                         /*
  70                          * The integrated IR controller on the CX23888 is
  71                          * host chip 2.  It may not be used/initialized or sd_ir
  72                          * may be pointing at the cx25840 subdevice for the
  73                          * IR controller on the CX23885.  Thus we find it
  74                          * without using the dev->sd_ir pointer.
  75                          */
  76                         call_hw(dev, CX23885_HW_888_IR, core, g_chip_ident,
  77                                 chip);
  78                         break;
  79                 default:
  80                         err = -EINVAL; /* per V4L2 spec */
  81                         break;
  82                 }
  83                 break;
  84         case V4L2_CHIP_MATCH_I2C_DRIVER:
  85                 /* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */
  86                 call_all(dev, core, g_chip_ident, chip);
  87                 break;
  88         case V4L2_CHIP_MATCH_I2C_ADDR:
  89                 /*
  90                  * We could return V4L2_IDENT_UNKNOWN, but we don't do the work
  91                  * to look if a chip is at the address with no driver.  That's a
  92                  * dangerous thing to do with EEPROMs anyway.
  93                  */
  94                 call_all(dev, core, g_chip_ident, chip);
  95                 break;
  96         default:
  97                 err = -EINVAL;
  98                 break;
  99         }
 100         return err;
 101 }
 102
 103 #ifdef CONFIG_VIDEO_ADV_DEBUG
 104 static int cx23885_g_host_register(struct cx23885_dev *dev,
 105                                    struct v4l2_dbg_register *reg)
 106 {
 107         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
 108                 return -EINVAL;
 109
 110         reg->size = 4;
 111         reg->val = cx_read(reg->reg);
 112         return 0;
 113 }
 114
 115 static int cx23417_g_register(struct cx23885_dev *dev,
 116                               struct v4l2_dbg_register *reg)
 117 {
 118         u32 value;
 119
 120         if (dev->v4l_device == NULL)
 121                 return -EINVAL;
 122
 123         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
 124                 return -EINVAL;
 125
 126         if (mc417_register_read(dev, (u16) reg->reg, &value))
 127                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
 128
 129         reg->size = 4;
 130         reg->val = value;
 131         return 0;
 132 }
 133
 134 int cx23885_g_register(struct file *file, void *fh,
 135                        struct v4l2_dbg_register *reg)
 136 {
 137         struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
 138
 139         if (!capable(CAP_SYS_ADMIN))
 140                 return -EPERM;
 141
 142         if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
 143                 switch (reg->match.addr) {
 144                 case 0:
 145                         return cx23885_g_host_register(dev, reg);
 146                 case 1:
 147                         return cx23417_g_register(dev, reg);
 148                 default:
 149                         break;
 150                 }
 151         }
 152
 153         /* FIXME - any error returns should not be ignored */
 154         call_all(dev, core, g_register, reg);
 155         return 0;
 156 }
 157
 158 static int cx23885_s_host_register(struct cx23885_dev *dev,
 159                                    struct v4l2_dbg_register *reg)
 160 {
 161         if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
 162                 return -EINVAL;
 163
 164         reg->size = 4;
 165         cx_write(reg->reg, reg->val);
 166         return 0;
 167 }
 168
 169 static int cx23417_s_register(struct cx23885_dev *dev,
 170                               struct v4l2_dbg_register *reg)
 171 {
 172         if (dev->v4l_device == NULL)
 173                 return -EINVAL;
 174
 175         if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
 176                 return -EINVAL;
 177
 178         if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
 179                 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
 180
 181         reg->size = 4;
 182         return 0;
 183 }
 184
 185 int cx23885_s_register(struct file *file, void *fh,
 186                        struct v4l2_dbg_register *reg)
 187 {
 188         struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev;
 189
 190         if (!capable(CAP_SYS_ADMIN))
 191                 return -EPERM;
 192
 193         if (reg->match.type == V4L2_CHIP_MATCH_HOST) {
 194                 switch (reg->match.addr) {
 195                 case 0:
 196                         return cx23885_s_host_register(dev, reg);
 197                 case 1:
 198                         return cx23417_s_register(dev, reg);
 199                 default:
 200                         break;
 201                 }
 202         }
 203
 204         /* FIXME - any error returns should not be ignored */
 205         call_all(dev, core, s_register, reg);
 206         return 0;
 207 }
 208 #endif