diff options
Diffstat (limited to 'drivers/media/i2c/upd64083.c')
| -rw-r--r-- | drivers/media/i2c/upd64083.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/drivers/media/i2c/upd64083.c b/drivers/media/i2c/upd64083.c new file mode 100644 index 000000000..c7fdd7c16 --- /dev/null +++ b/drivers/media/i2c/upd64083.c @@ -0,0 +1,218 @@ +/* + * 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. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <linux/slab.h> +#include <media/v4l2-device.h> +#include <media/i2c/upd64083.h> + +MODULE_DESCRIPTION("uPD64083 driver"); +MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); +MODULE_LICENSE("GPL"); + +static bool debug; +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 { + struct v4l2_subdev sd; + u8 mode; + u8 ext_y_adc; + u8 regs[TOT_REGS]; +}; + +static inline struct upd64083_state *to_state(struct v4l2_subdev *sd) +{ + return container_of(sd, struct upd64083_state, sd); +} + +/* 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_write(struct v4l2_subdev *sd, u8 reg, u8 val) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 buf[2]; + + buf[0] = reg; + buf[1] = val; + v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val); + if (i2c_master_send(client, buf, 2) != 2) + v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val); +} + +/* ------------------------------------------------------------------------ */ + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 buf[7]; + + if (reg >= sizeof(buf)) + return 0xff; + i2c_master_recv(client, buf, sizeof(buf)); + return buf[reg]; +} +#endif + +/* ------------------------------------------------------------------------ */ + +static int upd64083_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + struct upd64083_state *state = to_state(sd); + u8 r00, r02; + + if (input > 7 || (input & 6) == 6) + return -EINVAL; + state->mode = (input & 3) << 6; + state->ext_y_adc = (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(sd, R00, r00); + upd64083_write(sd, R02, r02); + return 0; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) +{ + reg->val = upd64083_read(sd, reg->reg & 0xff); + reg->size = 1; + return 0; +} + +static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) +{ + upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff); + return 0; +} +#endif + +static int upd64083_log_status(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 buf[7]; + + i2c_master_recv(client, buf, 7); + v4l2_info(sd, "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]); + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_subdev_core_ops upd64083_core_ops = { + .log_status = upd64083_log_status, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = upd64083_g_register, + .s_register = upd64083_s_register, +#endif +}; + +static const struct v4l2_subdev_video_ops upd64083_video_ops = { + .s_routing = upd64083_s_routing, +}; + +static const struct v4l2_subdev_ops upd64083_ops = { + .core = &upd64083_core_ops, + .video = &upd64083_video_ops, +}; + +/* ------------------------------------------------------------------------ */ + +/* i2c implementation */ + +static int upd64083_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct upd64083_state *state; + struct v4l2_subdev *sd; + 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 = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); + if (state == NULL) + return -ENOMEM; + sd = &state->sd; + v4l2_i2c_subdev_init(sd, client, &upd64083_ops); + /* 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(sd, i, state->regs[i]); + return 0; +} + +static int upd64083_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + + v4l2_device_unregister_subdev(sd); + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct i2c_device_id upd64083_id[] = { + { "upd64083", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, upd64083_id); + +static struct i2c_driver upd64083_driver = { + .driver = { + .name = "upd64083", + }, + .probe = upd64083_probe, + .remove = upd64083_remove, + .id_table = upd64083_id, +}; + +module_i2c_driver(upd64083_driver); |