1/* 2 * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan 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 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 * 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., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23 24#include <linux/version.h> 25#include <linux/module.h> 26#include <linux/kernel.h> 27#include <linux/i2c.h> 28#include <linux/videodev2.h> 29#include <media/v4l2-common.h> 30#include <media/v4l2-chip-ident.h> 31#include <media/upd64031a.h> 32 33// --------------------- read registers functions define ----------------------- 34 35/* bit masks */ 36#define GR_MODE_MASK 0xc0 37#define DIRECT_3DYCS_CONNECT_MASK 0xc0 38#define SYNC_CIRCUIT_MASK 0xa0 39 40// ----------------------------------------------------------------------------- 41 42MODULE_DESCRIPTION("uPD64031A driver"); 43MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); 44MODULE_LICENSE("GPL"); 45 46static int debug = 0; 47module_param(debug, int, 0644); 48 49MODULE_PARM_DESC(debug, "Debug level (0-1)"); 50 51static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END }; 52 53 54I2C_CLIENT_INSMOD; 55 56enum { 57 R00 = 0, R01, R02, R03, R04, 58 R05, R06, R07, R08, R09, 59 R0A, R0B, R0C, R0D, R0E, R0F, 60 /* unused registers 61 R10, R11, R12, R13, R14, 62 R15, R16, R17, 63 */ 64 TOT_REGS 65}; 66 67struct upd64031a_state { 68 u8 regs[TOT_REGS]; 69 u8 gr_mode; 70 u8 direct_3dycs_connect; 71 u8 ext_comp_sync; 72 u8 ext_vert_sync; 73}; 74 75static u8 upd64031a_init[] = { 76 0x00, 0xb8, 0x48, 0xd2, 0xe6, 77 0x03, 0x10, 0x0b, 0xaf, 0x7f, 78 0x00, 0x00, 0x1d, 0x5e, 0x00, 79 0xd0 80}; 81 82/* ------------------------------------------------------------------------ */ 83 84static u8 upd64031a_read(struct i2c_client *client, u8 reg) 85{ 86 u8 buf[2]; 87 88 if (reg >= sizeof(buf)) 89 return 0xff; 90 i2c_master_recv(client, buf, 2); 91 return buf[reg]; 92} 93 94/* ------------------------------------------------------------------------ */ 95 96static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val) 97{ 98 u8 buf[2]; 99 100 buf[0] = reg; 101 buf[1] = val; 102 v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val); 103 if (i2c_master_send(client, buf, 2) != 2) 104 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val); 105} 106 107/* ------------------------------------------------------------------------ */ 108 109/* The input changed due to new input or channel changed */ 110static void upd64031a_change(struct i2c_client *client) 111{ 112 struct upd64031a_state *state = i2c_get_clientdata(client); 113 u8 reg = state->regs[R00]; 114 115 v4l_dbg(1, debug, client, "changed input or channel\n"); 116 upd64031a_write(client, R00, reg | 0x10); 117 upd64031a_write(client, R00, reg & ~0x10); 118} 119 120/* ------------------------------------------------------------------------ */ 121 122static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg) 123{ 124 struct upd64031a_state *state = i2c_get_clientdata(client); 125 struct v4l2_routing *route = arg; 126 127 switch (cmd) { 128 case VIDIOC_S_FREQUENCY: 129 upd64031a_change(client); 130 break; 131 132 case VIDIOC_INT_G_VIDEO_ROUTING: 133 route->input = (state->gr_mode >> 6) | 134 (state->direct_3dycs_connect >> 4) | 135 (state->ext_comp_sync >> 1) | 136 (state->ext_vert_sync >> 2); 137 route->output = 0; 138 break; 139 140 case VIDIOC_INT_S_VIDEO_ROUTING: 141 { 142 u8 r00, r05, r08; 143 144 state->gr_mode = (route->input & 3) << 6; 145 state->direct_3dycs_connect = (route->input & 0xc) << 4; 146 state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1; 147 state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2; 148 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode; 149 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) | 150 state->ext_comp_sync | state->ext_vert_sync; 151 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) | 152 state->direct_3dycs_connect; 153 upd64031a_write(client, R00, r00); 154 upd64031a_write(client, R05, r05); 155 upd64031a_write(client, R08, r08); 156 upd64031a_change(client); 157 break; 158 } 159 160 case VIDIOC_LOG_STATUS: 161 v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n", 162 upd64031a_read(client, 0), upd64031a_read(client, 1)); 163 break; 164 165#ifdef CONFIG_VIDEO_ADV_DEBUG 166 case VIDIOC_DBG_G_REGISTER: 167 case VIDIOC_DBG_S_REGISTER: 168 { 169 struct v4l2_register *reg = arg; 170 171 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip)) 172 return -EINVAL; 173 if (!capable(CAP_SYS_ADMIN)) 174 return -EPERM; 175 if (cmd == VIDIOC_DBG_G_REGISTER) 176 reg->val = upd64031a_read(client, reg->reg & 0xff); 177 else 178 upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff); 179 break; 180 } 181#endif 182 183 case VIDIOC_G_CHIP_IDENT: 184 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64031A, 0); 185 186 default: 187 break; 188 } 189 return 0; 190} 191 192/* ------------------------------------------------------------------------ */ 193 194/* i2c implementation */ 195 196static struct i2c_driver i2c_driver; 197 198static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind) 199{ 200 struct i2c_client *client; 201 struct upd64031a_state *state; 202 int i; 203 204 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 205 return 0; 206 207 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); 208 if (client == NULL) { 209 return -ENOMEM; 210 } 211 212 client->addr = address; 213 client->adapter = adapter; 214 client->driver = &i2c_driver; 215 snprintf(client->name, sizeof(client->name) - 1, "uPD64031A"); 216 217 v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name); 218 219 state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL); 220 if (state == NULL) { 221 kfree(client); 222 return -ENOMEM; 223 } 224 i2c_set_clientdata(client, state); 225 memcpy(state->regs, upd64031a_init, sizeof(state->regs)); 226 state->gr_mode = UPD64031A_GR_ON << 6; 227 state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4; 228 state->ext_comp_sync = state->ext_vert_sync = 0; 229 for (i = 0; i < TOT_REGS; i++) { 230 upd64031a_write(client, i, state->regs[i]); 231 } 232 233 i2c_attach_client(client); 234 235 return 0; 236} 237 238static int upd64031a_probe(struct i2c_adapter *adapter) 239{ 240 if (adapter->class & I2C_CLASS_TV_ANALOG) 241 return i2c_probe(adapter, &addr_data, upd64031a_attach); 242 return 0; 243} 244 245static int upd64031a_detach(struct i2c_client *client) 246{ 247 int err; 248 249 err = i2c_detach_client(client); 250 if (err) 251 return err; 252 253 kfree(client); 254 return 0; 255} 256 257/* ----------------------------------------------------------------------- */ 258 259/* i2c implementation */ 260static struct i2c_driver i2c_driver = { 261 .driver = { 262 .name = "upd64031a", 263 }, 264 .id = I2C_DRIVERID_UPD64031A, 265 .attach_adapter = upd64031a_probe, 266 .detach_client = upd64031a_detach, 267 .command = upd64031a_command, 268}; 269 270 271static int __init upd64031a_init_module(void) 272{ 273 return i2c_add_driver(&i2c_driver); 274} 275 276static void __exit upd64031a_exit_module(void) 277{ 278 i2c_del_driver(&i2c_driver); 279} 280 281module_init(upd64031a_init_module); 282module_exit(upd64031a_exit_module); 283