/* * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver * * 2003 by T.Adachi (tadachi@tadachi-net.com) * 2003 by Takeru KOMORIYA * 2006 by Hans Verkuil * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include #include #include #include #include #include #include MODULE_DESCRIPTION("uPD64083 driver"); MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); MODULE_LICENSE("GPL"); static int debug = 0; module_param(debug, bool, 0644); MODULE_PARM_DESC(debug, "Debug level (0-1)"); static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END }; I2C_CLIENT_INSMOD; enum { R00 = 0, R01, R02, R03, R04, R05, R06, R07, R08, R09, R0A, R0B, R0C, R0D, R0E, R0F, R10, R11, R12, R13, R14, R15, R16, TOT_REGS }; struct upd64083_state { u8 mode; u8 ext_y_adc; u8 regs[TOT_REGS]; }; /* Initial values when used in combination with the NEC upd64031a ghost reduction chip. */ static u8 upd64083_init[] = { 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ 0x36, 0xdd, 0x05, 0x56, 0x48, 0x00, 0x3a, 0xa0, 0x05, 0x08, 0x44, 0x60, 0x08, 0x52, 0xf8, 0x53, 0x60, 0x10 }; /* ------------------------------------------------------------------------ */ static void upd64083_log_status(struct i2c_client *client) { u8 buf[7]; i2c_master_recv(client, buf, 7); v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " "SA04=%02x SA05=%02x SA06=%02x\n", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); } /* ------------------------------------------------------------------------ */ static void upd64083_write(struct i2c_client *client, u8 reg, u8 val) { u8 buf[2]; buf[0] = reg; buf[1] = val; v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val); if (i2c_master_send(client, buf, 2) != 2) v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val); } /* ------------------------------------------------------------------------ */ #ifdef CONFIG_VIDEO_ADV_DEBUG static u8 upd64083_read(struct i2c_client *client, u8 reg) { u8 buf[7]; if (reg >= sizeof(buf)) return 0xff; i2c_master_recv(client, buf, sizeof(buf)); return buf[reg]; } #endif /* ------------------------------------------------------------------------ */ static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg) { struct upd64083_state *state = i2c_get_clientdata(client); struct v4l2_routing *route = arg; switch (cmd) { case VIDIOC_INT_G_VIDEO_ROUTING: route->input = (state->mode >> 6) | (state->ext_y_adc >> 3); route->output = 0; break; case VIDIOC_INT_S_VIDEO_ROUTING: { u8 r00, r02; if (route->input > 7 || (route->input & 6) == 6) return -EINVAL; state->mode = (route->input & 3) << 6; state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3; r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; upd64083_write(client, R00, r00); upd64083_write(client, R02, r02); break; } case VIDIOC_LOG_STATUS: upd64083_log_status(client); break; #ifdef CONFIG_VIDEO_ADV_DEBUG case VIDIOC_DBG_G_REGISTER: { struct v4l2_register *reg = arg; if (reg->i2c_id != I2C_DRIVERID_UPD64083) return -EINVAL; reg->val = upd64083_read(client, reg->reg & 0xff); break; } case VIDIOC_DBG_S_REGISTER: { struct v4l2_register *reg = arg; u8 addr = reg->reg & 0xff; u8 val = reg->val & 0xff; if (reg->i2c_id != I2C_DRIVERID_UPD64083) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; upd64083_write(client, addr, val); break; } #endif default: break; } return 0; } /* ------------------------------------------------------------------------ */ /* i2c implementation */ static struct i2c_driver i2c_driver; static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind) { struct i2c_client *client; struct upd64083_state *state; int i; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return 0; client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); if (client == NULL) { return -ENOMEM; } client->addr = address; client->adapter = adapter; client->driver = &i2c_driver; snprintf(client->name, sizeof(client->name) - 1, "uPD64083"); v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name); state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL); if (state == NULL) { kfree(client); return -ENOMEM; } i2c_set_clientdata(client, state); /* Initially assume that a ghost reduction chip is present */ state->mode = 0; /* YCS mode */ state->ext_y_adc = (1 << 5); memcpy(state->regs, upd64083_init, TOT_REGS); for (i = 0; i < TOT_REGS; i++) { upd64083_write(client, i, state->regs[i]); } i2c_attach_client(client); return 0; } static int upd64083_probe(struct i2c_adapter *adapter) { if (adapter->class & I2C_CLASS_TV_ANALOG) return i2c_probe(adapter, &addr_data, upd64083_attach); return 0; } static int upd64083_detach(struct i2c_client *client) { int err; err = i2c_detach_client(client); if (err) return err; kfree(client); return 0; } /* ----------------------------------------------------------------------- */ /* i2c implementation */ static struct i2c_driver i2c_driver = { .driver = { .name = "upd64083", }, .id = I2C_DRIVERID_UPD64083, .attach_adapter = upd64083_probe, .detach_client = upd64083_detach, .command = upd64083_command, }; static int __init upd64083_init_module(void) { return i2c_add_driver(&i2c_driver); } static void __exit upd64083_exit_module(void) { i2c_del_driver(&i2c_driver); } module_init(upd64083_init_module); module_exit(upd64083_exit_module);