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 <media/v4l2-chip-ident.h> 26 27int 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 104static 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 115static 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 134int 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 call_all(dev, core, g_register, reg); 154 return 0; 155} 156 157static int cx23885_s_host_register(struct cx23885_dev *dev, 158 struct v4l2_dbg_register *reg) 159{ 160 if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0)) 161 return -EINVAL; 162 163 reg->size = 4; 164 cx_write(reg->reg, reg->val); 165 return 0; 166} 167 168static int cx23417_s_register(struct cx23885_dev *dev, 169 struct v4l2_dbg_register *reg) 170{ 171 if (dev->v4l_device == NULL) 172 return -EINVAL; 173 174 if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000) 175 return -EINVAL; 176 177 if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val)) 178 return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */ 179 180 reg->size = 4; 181 return 0; 182} 183 184int cx23885_s_register(struct file *file, void *fh, 185 struct v4l2_dbg_register *reg) 186{ 187 struct cx23885_dev *dev = ((struct cx23885_fh *)fh)->dev; 188 189 if (!capable(CAP_SYS_ADMIN)) 190 return -EPERM; 191 192 if (reg->match.type == V4L2_CHIP_MATCH_HOST) { 193 switch (reg->match.addr) { 194 case 0: 195 return cx23885_s_host_register(dev, reg); 196 case 1: 197 return cx23417_s_register(dev, reg); 198 default: 199 break; 200 } 201 } 202 203 call_all(dev, core, s_register, reg); 204 return 0; 205} 206#endif 207