1/* 2 * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver 3 * 4 * 2003 by T.Adachi (tadachi@tadachi-net.com) 5 * 2003 by Takeru KOMORIYA <komoriya@paken.org> 6 * 2006 by Hans Verkuil <hverkuil@xs4all.nl> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 2 11 * of the License, or (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 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24#include <linux/module.h> 25#include <linux/kernel.h> 26#include <linux/i2c.h> 27#include <linux/videodev2.h> 28#include <linux/slab.h> 29#include <media/v4l2-device.h> 30#include <media/v4l2-chip-ident.h> 31#include <media/v4l2-i2c-drv.h> 32#include <media/upd64083.h> 33 34MODULE_DESCRIPTION("uPD64083 driver"); 35MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); 36MODULE_LICENSE("GPL"); 37 38static int debug; 39module_param(debug, bool, 0644); 40 41MODULE_PARM_DESC(debug, "Debug level (0-1)"); 42 43 44enum { 45 R00 = 0, R01, R02, R03, R04, 46 R05, R06, R07, R08, R09, 47 R0A, R0B, R0C, R0D, R0E, R0F, 48 R10, R11, R12, R13, R14, 49 R15, R16, 50 TOT_REGS 51}; 52 53struct upd64083_state { 54 struct v4l2_subdev sd; 55 u8 mode; 56 u8 ext_y_adc; 57 u8 regs[TOT_REGS]; 58}; 59 60static inline struct upd64083_state *to_state(struct v4l2_subdev *sd) 61{ 62 return container_of(sd, struct upd64083_state, sd); 63} 64 65/* Initial values when used in combination with the 66 NEC upd64031a ghost reduction chip. */ 67static u8 upd64083_init[] = { 68 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ 69 0x36, 0xdd, 0x05, 0x56, 0x48, 70 0x00, 0x3a, 0xa0, 0x05, 0x08, 71 0x44, 0x60, 0x08, 0x52, 0xf8, 72 0x53, 0x60, 0x10 73}; 74 75/* ------------------------------------------------------------------------ */ 76 77static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val) 78{ 79 struct i2c_client *client = v4l2_get_subdevdata(sd); 80 u8 buf[2]; 81 82 buf[0] = reg; 83 buf[1] = val; 84 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val); 85 if (i2c_master_send(client, buf, 2) != 2) 86 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val); 87} 88 89/* ------------------------------------------------------------------------ */ 90 91#ifdef CONFIG_VIDEO_ADV_DEBUG 92static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg) 93{ 94 struct i2c_client *client = v4l2_get_subdevdata(sd); 95 u8 buf[7]; 96 97 if (reg >= sizeof(buf)) 98 return 0xff; 99 i2c_master_recv(client, buf, sizeof(buf)); 100 return buf[reg]; 101} 102#endif 103 104/* ------------------------------------------------------------------------ */ 105 106static int upd64083_s_routing(struct v4l2_subdev *sd, 107 u32 input, u32 output, u32 config) 108{ 109 struct upd64083_state *state = to_state(sd); 110 u8 r00, r02; 111 112 if (input > 7 || (input & 6) == 6) 113 return -EINVAL; 114 state->mode = (input & 3) << 6; 115 state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3; 116 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; 117 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; 118 upd64083_write(sd, R00, r00); 119 upd64083_write(sd, R02, r02); 120 return 0; 121} 122 123#ifdef CONFIG_VIDEO_ADV_DEBUG 124static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 125{ 126 struct i2c_client *client = v4l2_get_subdevdata(sd); 127 128 if (!v4l2_chip_match_i2c_client(client, ®->match)) 129 return -EINVAL; 130 if (!capable(CAP_SYS_ADMIN)) 131 return -EPERM; 132 reg->val = upd64083_read(sd, reg->reg & 0xff); 133 reg->size = 1; 134 return 0; 135} 136 137static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) 138{ 139 struct i2c_client *client = v4l2_get_subdevdata(sd); 140 141 if (!v4l2_chip_match_i2c_client(client, ®->match)) 142 return -EINVAL; 143 if (!capable(CAP_SYS_ADMIN)) 144 return -EPERM; 145 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff); 146 return 0; 147} 148#endif 149 150static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) 151{ 152 struct i2c_client *client = v4l2_get_subdevdata(sd); 153 154 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0); 155} 156 157static int upd64083_log_status(struct v4l2_subdev *sd) 158{ 159 struct i2c_client *client = v4l2_get_subdevdata(sd); 160 u8 buf[7]; 161 162 i2c_master_recv(client, buf, 7); 163 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " 164 "SA04=%02x SA05=%02x SA06=%02x\n", 165 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 166 return 0; 167} 168 169/* ----------------------------------------------------------------------- */ 170 171static const struct v4l2_subdev_core_ops upd64083_core_ops = { 172 .log_status = upd64083_log_status, 173 .g_chip_ident = upd64083_g_chip_ident, 174#ifdef CONFIG_VIDEO_ADV_DEBUG 175 .g_register = upd64083_g_register, 176 .s_register = upd64083_s_register, 177#endif 178}; 179 180static const struct v4l2_subdev_video_ops upd64083_video_ops = { 181 .s_routing = upd64083_s_routing, 182}; 183 184static const struct v4l2_subdev_ops upd64083_ops = { 185 .core = &upd64083_core_ops, 186 .video = &upd64083_video_ops, 187}; 188 189/* ------------------------------------------------------------------------ */ 190 191/* i2c implementation */ 192 193static int upd64083_probe(struct i2c_client *client, 194 const struct i2c_device_id *id) 195{ 196 struct upd64083_state *state; 197 struct v4l2_subdev *sd; 198 int i; 199 200 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 201 return -EIO; 202 203 v4l_info(client, "chip found @ 0x%x (%s)\n", 204 client->addr << 1, client->adapter->name); 205 206 state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL); 207 if (state == NULL) 208 return -ENOMEM; 209 sd = &state->sd; 210 v4l2_i2c_subdev_init(sd, client, &upd64083_ops); 211 /* Initially assume that a ghost reduction chip is present */ 212 state->mode = 0; /* YCS mode */ 213 state->ext_y_adc = (1 << 5); 214 memcpy(state->regs, upd64083_init, TOT_REGS); 215 for (i = 0; i < TOT_REGS; i++) 216 upd64083_write(sd, i, state->regs[i]); 217 return 0; 218} 219 220static int upd64083_remove(struct i2c_client *client) 221{ 222 struct v4l2_subdev *sd = i2c_get_clientdata(client); 223 224 v4l2_device_unregister_subdev(sd); 225 kfree(to_state(sd)); 226 return 0; 227} 228 229/* ----------------------------------------------------------------------- */ 230 231static const struct i2c_device_id upd64083_id[] = { 232 { "upd64083", 0 }, 233 { } 234}; 235MODULE_DEVICE_TABLE(i2c, upd64083_id); 236 237static struct v4l2_i2c_driver_data v4l2_i2c_data = { 238 .name = "upd64083", 239 .probe = upd64083_probe, 240 .remove = upd64083_remove, 241 .id_table = upd64083_id, 242}; 243