| /* |
| * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver |
| * |
| * 2003 by T.Adachi (tadachi@tadachi-net.com) |
| * 2003 by Takeru KOMORIYA <komoriya@paken.org> |
| * 2006 by Hans Verkuil <hverkuil@xs4all.nl> |
| * |
| * 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 <linux/version.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/i2c.h> |
| #include <linux/videodev2.h> |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-chip-ident.h> |
| #include <media/v4l2-i2c-drv-legacy.h> |
| #include <media/upd64083.h> |
| |
| 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)"); |
| |
| |
| 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: |
| case VIDIOC_DBG_S_REGISTER: |
| { |
| struct v4l2_register *reg = arg; |
| |
| if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip)) |
| return -EINVAL; |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| if (cmd == VIDIOC_DBG_G_REGISTER) |
| reg->val = upd64083_read(client, reg->reg & 0xff); |
| else |
| upd64083_write(client, reg->reg & 0xff, reg->val & 0xff); |
| break; |
| } |
| #endif |
| |
| case VIDIOC_G_CHIP_IDENT: |
| return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64083, 0); |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| /* ------------------------------------------------------------------------ */ |
| |
| /* i2c implementation */ |
| |
| static int upd64083_probe(struct i2c_client *client) |
| { |
| struct upd64083_state *state; |
| int i; |
| |
| if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| return -EIO; |
| |
| v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); |
| |
| state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL); |
| if (state == NULL) { |
| 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]); |
| } |
| return 0; |
| } |
| |
| static int upd64083_remove(struct i2c_client *client) |
| { |
| kfree(i2c_get_clientdata(client)); |
| return 0; |
| } |
| |
| /* ----------------------------------------------------------------------- */ |
| |
| |
| static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
| .name = "upd64083", |
| .driverid = I2C_DRIVERID_UPD64083, |
| .command = upd64083_command, |
| .probe = upd64083_probe, |
| .remove = upd64083_remove, |
| }; |