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 02110-1301, USA. 21 */ 22 23#include <linux/version.h> 24#include <linux/module.h> 25#include <linux/kernel.h> 26#include <linux/i2c.h> 27#include <linux/videodev2.h> 28#include <media/v4l2-common.h> 29#include <media/v4l2-chip-ident.h> 30#include <media/upd64083.h> 31 32MODULE_DESCRIPTION("uPD64083 driver"); 33MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); 34MODULE_LICENSE("GPL"); 35 36static int debug = 0; 37module_param(debug, bool, 0644); 38 39MODULE_PARM_DESC(debug, "Debug level (0-1)"); 40 41static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END }; 42 43 44I2C_CLIENT_INSMOD; 45 46enum { 47 R00 = 0, R01, R02, R03, R04, 48 R05, R06, R07, R08, R09, 49 R0A, R0B, R0C, R0D, R0E, R0F, 50 R10, R11, R12, R13, R14, 51 R15, R16, 52 TOT_REGS 53}; 54 55struct upd64083_state { 56 u8 mode; 57 u8 ext_y_adc; 58 u8 regs[TOT_REGS]; 59}; 60 61/* Initial values when used in combination with the 62 NEC upd64031a ghost reduction chip. */ 63static u8 upd64083_init[] = { 64 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ 65 0x36, 0xdd, 0x05, 0x56, 0x48, 66 0x00, 0x3a, 0xa0, 0x05, 0x08, 67 0x44, 0x60, 0x08, 0x52, 0xf8, 68 0x53, 0x60, 0x10 69}; 70 71/* ------------------------------------------------------------------------ */ 72 73static void upd64083_log_status(struct i2c_client *client) 74{ 75 u8 buf[7]; 76 77 i2c_master_recv(client, buf, 7); 78 v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " 79 "SA04=%02x SA05=%02x SA06=%02x\n", 80 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 81} 82 83/* ------------------------------------------------------------------------ */ 84 85static void upd64083_write(struct i2c_client *client, u8 reg, u8 val) 86{ 87 u8 buf[2]; 88 89 buf[0] = reg; 90 buf[1] = val; 91 v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val); 92 if (i2c_master_send(client, buf, 2) != 2) 93 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val); 94} 95 96/* ------------------------------------------------------------------------ */ 97 98#ifdef CONFIG_VIDEO_ADV_DEBUG 99static u8 upd64083_read(struct i2c_client *client, u8 reg) 100{ 101 u8 buf[7]; 102 103 if (reg >= sizeof(buf)) 104 return 0xff; 105 i2c_master_recv(client, buf, sizeof(buf)); 106 return buf[reg]; 107} 108#endif 109 110/* ------------------------------------------------------------------------ */ 111 112static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg) 113{ 114 struct upd64083_state *state = i2c_get_clientdata(client); 115 struct v4l2_routing *route = arg; 116 117 switch (cmd) { 118 case VIDIOC_INT_G_VIDEO_ROUTING: 119 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3); 120 route->output = 0; 121 break; 122 123 case VIDIOC_INT_S_VIDEO_ROUTING: 124 { 125 u8 r00, r02; 126 127 if (route->input > 7 || (route->input & 6) == 6) 128 return -EINVAL; 129 state->mode = (route->input & 3) << 6; 130 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3; 131 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; 132 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; 133 upd64083_write(client, R00, r00); 134 upd64083_write(client, R02, r02); 135 break; 136 } 137 138 case VIDIOC_LOG_STATUS: 139 upd64083_log_status(client); 140 break; 141 142#ifdef CONFIG_VIDEO_ADV_DEBUG 143 case VIDIOC_DBG_G_REGISTER: 144 case VIDIOC_DBG_S_REGISTER: 145 { 146 struct v4l2_register *reg = arg; 147 148 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip)) 149 return -EINVAL; 150 if (!capable(CAP_SYS_ADMIN)) 151 return -EPERM; 152 if (cmd == VIDIOC_DBG_G_REGISTER) 153 reg->val = upd64083_read(client, reg->reg & 0xff); 154 else 155 upd64083_write(client, reg->reg & 0xff, reg->val & 0xff); 156 break; 157 } 158#endif 159 160 case VIDIOC_G_CHIP_IDENT: 161 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64083, 0); 162 163 default: 164 break; 165 } 166 167 return 0; 168} 169 170/* ------------------------------------------------------------------------ */ 171 172/* i2c implementation */ 173 174static struct i2c_driver i2c_driver; 175 176static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind) 177{ 178 struct i2c_client *client; 179 struct upd64083_state *state; 180 int i; 181 182 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 183 return 0; 184 185 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); 186 if (client == NULL) { 187 return -ENOMEM; 188 } 189 190 client->addr = address; 191 client->adapter = adapter; 192 client->driver = &i2c_driver; 193 snprintf(client->name, sizeof(client->name) - 1, "uPD64083"); 194 195 v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name); 196 197 state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL); 198 if (state == NULL) { 199 kfree(client); 200 return -ENOMEM; 201 } 202 i2c_set_clientdata(client, state); 203 /* Initially assume that a ghost reduction chip is present */ 204 state->mode = 0; /* YCS mode */ 205 state->ext_y_adc = (1 << 5); 206 memcpy(state->regs, upd64083_init, TOT_REGS); 207 for (i = 0; i < TOT_REGS; i++) { 208 upd64083_write(client, i, state->regs[i]); 209 } 210 i2c_attach_client(client); 211 212 return 0; 213} 214 215static int upd64083_probe(struct i2c_adapter *adapter) 216{ 217 if (adapter->class & I2C_CLASS_TV_ANALOG) 218 return i2c_probe(adapter, &addr_data, upd64083_attach); 219 return 0; 220} 221 222static int upd64083_detach(struct i2c_client *client) 223{ 224 int err; 225 226 err = i2c_detach_client(client); 227 if (err) 228 return err; 229 230 kfree(client); 231 return 0; 232} 233 234/* ----------------------------------------------------------------------- */ 235 236/* i2c implementation */ 237static struct i2c_driver i2c_driver = { 238 .driver = { 239 .name = "upd64083", 240 }, 241 .id = I2C_DRIVERID_UPD64083, 242 .attach_adapter = upd64083_probe, 243 .detach_client = upd64083_detach, 244 .command = upd64083_command, 245}; 246 247 248static int __init upd64083_init_module(void) 249{ 250 return i2c_add_driver(&i2c_driver); 251} 252 253static void __exit upd64083_exit_module(void) 254{ 255 i2c_del_driver(&i2c_driver); 256} 257 258module_init(upd64083_init_module); 259module_exit(upd64083_exit_module); 260