diff options
Diffstat (limited to 'drivers/media/i2c/upd64031a.c')
| -rw-r--r-- | drivers/media/i2c/upd64031a.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/drivers/media/i2c/upd64031a.c b/drivers/media/i2c/upd64031a.c new file mode 100644 index 000000000..ef35c6574 --- /dev/null +++ b/drivers/media/i2c/upd64031a.c @@ -0,0 +1,238 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan + * + * 2003 by T.Adachi <tadachi@tadachi-net.com> + * 2003 by Takeru KOMORIYA <komoriya@paken.org> + * 2006 by Hans Verkuil <hverkuil@xs4all.nl> + */ + + +#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/upd64031a.h> + +/* --------------------- read registers functions define -------------------- */ + +/* bit masks */ +#define GR_MODE_MASK 0xc0 +#define DIRECT_3DYCS_CONNECT_MASK 0xc0 +#define SYNC_CIRCUIT_MASK 0xa0 + +/* -------------------------------------------------------------------------- */ + +MODULE_DESCRIPTION("uPD64031A driver"); +MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); +MODULE_LICENSE("GPL"); + +static int debug; +module_param(debug, int, 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, + /* unused registers + R10, R11, R12, R13, R14, + R15, R16, R17, + */ + TOT_REGS +}; + +struct upd64031a_state { + struct v4l2_subdev sd; + u8 regs[TOT_REGS]; + u8 gr_mode; + u8 direct_3dycs_connect; + u8 ext_comp_sync; + u8 ext_vert_sync; +}; + +static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd) +{ + return container_of(sd, struct upd64031a_state, sd); +} + +static u8 upd64031a_init[] = { + 0x00, 0xb8, 0x48, 0xd2, 0xe6, + 0x03, 0x10, 0x0b, 0xaf, 0x7f, + 0x00, 0x00, 0x1d, 0x5e, 0x00, + 0xd0 +}; + +/* ------------------------------------------------------------------------ */ + +static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 buf[2]; + + if (reg >= sizeof(buf)) + return 0xff; + i2c_master_recv(client, buf, 2); + return buf[reg]; +} + +/* ------------------------------------------------------------------------ */ + +static void upd64031a_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); +} + +/* ------------------------------------------------------------------------ */ + +/* The input changed due to new input or channel changed */ +static int upd64031a_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq) +{ + struct upd64031a_state *state = to_state(sd); + u8 reg = state->regs[R00]; + + v4l2_dbg(1, debug, sd, "changed input or channel\n"); + upd64031a_write(sd, R00, reg | 0x10); + upd64031a_write(sd, R00, reg & ~0x10); + return 0; +} + +/* ------------------------------------------------------------------------ */ + +static int upd64031a_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + struct upd64031a_state *state = to_state(sd); + u8 r00, r05, r08; + + state->gr_mode = (input & 3) << 6; + state->direct_3dycs_connect = (input & 0xc) << 4; + state->ext_comp_sync = + (input & UPD64031A_COMPOSITE_EXTERNAL) << 1; + state->ext_vert_sync = + (input & UPD64031A_VERTICAL_EXTERNAL) << 2; + r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode; + r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) | + state->ext_comp_sync | state->ext_vert_sync; + r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) | + state->direct_3dycs_connect; + upd64031a_write(sd, R00, r00); + upd64031a_write(sd, R05, r05); + upd64031a_write(sd, R08, r08); + return upd64031a_s_frequency(sd, NULL); +} + +static int upd64031a_log_status(struct v4l2_subdev *sd) +{ + v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n", + upd64031a_read(sd, 0), upd64031a_read(sd, 1)); + return 0; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) +{ + reg->val = upd64031a_read(sd, reg->reg & 0xff); + reg->size = 1; + return 0; +} + +static int upd64031a_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) +{ + upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff); + return 0; +} +#endif + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_subdev_core_ops upd64031a_core_ops = { + .log_status = upd64031a_log_status, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = upd64031a_g_register, + .s_register = upd64031a_s_register, +#endif +}; + +static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = { + .s_frequency = upd64031a_s_frequency, +}; + +static const struct v4l2_subdev_video_ops upd64031a_video_ops = { + .s_routing = upd64031a_s_routing, +}; + +static const struct v4l2_subdev_ops upd64031a_ops = { + .core = &upd64031a_core_ops, + .tuner = &upd64031a_tuner_ops, + .video = &upd64031a_video_ops, +}; + +/* ------------------------------------------------------------------------ */ + +/* i2c implementation */ + +static int upd64031a_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct upd64031a_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, &upd64031a_ops); + memcpy(state->regs, upd64031a_init, sizeof(state->regs)); + state->gr_mode = UPD64031A_GR_ON << 6; + state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4; + state->ext_comp_sync = state->ext_vert_sync = 0; + for (i = 0; i < TOT_REGS; i++) + upd64031a_write(sd, i, state->regs[i]); + return 0; +} + +static int upd64031a_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 upd64031a_id[] = { + { "upd64031a", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, upd64031a_id); + +static struct i2c_driver upd64031a_driver = { + .driver = { + .name = "upd64031a", + }, + .probe = upd64031a_probe, + .remove = upd64031a_remove, + .id_table = upd64031a_id, +}; + +module_i2c_driver(upd64031a_driver); |