237 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan4 *5 * 2003 by T.Adachi <tadachi@tadachi-net.com>6 * 2003 by Takeru KOMORIYA <komoriya@paken.org>7 * 2006 by Hans Verkuil <hverkuil@xs4all.nl>8 */9 10 11#include <linux/module.h>12#include <linux/kernel.h>13#include <linux/i2c.h>14#include <linux/videodev2.h>15#include <linux/slab.h>16#include <media/v4l2-device.h>17#include <media/i2c/upd64031a.h>18 19/* --------------------- read registers functions define -------------------- */20 21/* bit masks */22#define GR_MODE_MASK 0xc023#define DIRECT_3DYCS_CONNECT_MASK 0xc024#define SYNC_CIRCUIT_MASK 0xa025 26/* -------------------------------------------------------------------------- */27 28MODULE_DESCRIPTION("uPD64031A driver");29MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");30MODULE_LICENSE("GPL");31 32static int debug;33module_param(debug, int, 0644);34 35MODULE_PARM_DESC(debug, "Debug level (0-1)");36 37 38enum {39 R00 = 0, R01, R02, R03, R04,40 R05, R06, R07, R08, R09,41 R0A, R0B, R0C, R0D, R0E, R0F,42 /* unused registers43 R10, R11, R12, R13, R14,44 R15, R16, R17,45 */46 TOT_REGS47};48 49struct upd64031a_state {50 struct v4l2_subdev sd;51 u8 regs[TOT_REGS];52 u8 gr_mode;53 u8 direct_3dycs_connect;54 u8 ext_comp_sync;55 u8 ext_vert_sync;56};57 58static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)59{60 return container_of(sd, struct upd64031a_state, sd);61}62 63static u8 upd64031a_init[] = {64 0x00, 0xb8, 0x48, 0xd2, 0xe6,65 0x03, 0x10, 0x0b, 0xaf, 0x7f,66 0x00, 0x00, 0x1d, 0x5e, 0x00,67 0xd068};69 70/* ------------------------------------------------------------------------ */71 72static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)73{74 struct i2c_client *client = v4l2_get_subdevdata(sd);75 u8 buf[2];76 77 if (reg >= sizeof(buf))78 return 0xff;79 i2c_master_recv(client, buf, 2);80 return buf[reg];81}82 83/* ------------------------------------------------------------------------ */84 85static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)86{87 struct i2c_client *client = v4l2_get_subdevdata(sd);88 u8 buf[2];89 90 buf[0] = reg;91 buf[1] = val;92 v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);93 if (i2c_master_send(client, buf, 2) != 2)94 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);95}96 97/* ------------------------------------------------------------------------ */98 99/* The input changed due to new input or channel changed */100static int upd64031a_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq)101{102 struct upd64031a_state *state = to_state(sd);103 u8 reg = state->regs[R00];104 105 v4l2_dbg(1, debug, sd, "changed input or channel\n");106 upd64031a_write(sd, R00, reg | 0x10);107 upd64031a_write(sd, R00, reg & ~0x10);108 return 0;109}110 111/* ------------------------------------------------------------------------ */112 113static int upd64031a_s_routing(struct v4l2_subdev *sd,114 u32 input, u32 output, u32 config)115{116 struct upd64031a_state *state = to_state(sd);117 u8 r00, r05, r08;118 119 state->gr_mode = (input & 3) << 6;120 state->direct_3dycs_connect = (input & 0xc) << 4;121 state->ext_comp_sync =122 (input & UPD64031A_COMPOSITE_EXTERNAL) << 1;123 state->ext_vert_sync =124 (input & UPD64031A_VERTICAL_EXTERNAL) << 2;125 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;126 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |127 state->ext_comp_sync | state->ext_vert_sync;128 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |129 state->direct_3dycs_connect;130 upd64031a_write(sd, R00, r00);131 upd64031a_write(sd, R05, r05);132 upd64031a_write(sd, R08, r08);133 return upd64031a_s_frequency(sd, NULL);134}135 136static int upd64031a_log_status(struct v4l2_subdev *sd)137{138 v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",139 upd64031a_read(sd, 0), upd64031a_read(sd, 1));140 return 0;141}142 143#ifdef CONFIG_VIDEO_ADV_DEBUG144static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)145{146 reg->val = upd64031a_read(sd, reg->reg & 0xff);147 reg->size = 1;148 return 0;149}150 151static int upd64031a_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)152{153 upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);154 return 0;155}156#endif157 158/* ----------------------------------------------------------------------- */159 160static const struct v4l2_subdev_core_ops upd64031a_core_ops = {161 .log_status = upd64031a_log_status,162#ifdef CONFIG_VIDEO_ADV_DEBUG163 .g_register = upd64031a_g_register,164 .s_register = upd64031a_s_register,165#endif166};167 168static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {169 .s_frequency = upd64031a_s_frequency,170};171 172static const struct v4l2_subdev_video_ops upd64031a_video_ops = {173 .s_routing = upd64031a_s_routing,174};175 176static const struct v4l2_subdev_ops upd64031a_ops = {177 .core = &upd64031a_core_ops,178 .tuner = &upd64031a_tuner_ops,179 .video = &upd64031a_video_ops,180};181 182/* ------------------------------------------------------------------------ */183 184/* i2c implementation */185 186static int upd64031a_probe(struct i2c_client *client)187{188 struct upd64031a_state *state;189 struct v4l2_subdev *sd;190 int i;191 192 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))193 return -EIO;194 195 v4l_info(client, "chip found @ 0x%x (%s)\n",196 client->addr << 1, client->adapter->name);197 198 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);199 if (state == NULL)200 return -ENOMEM;201 sd = &state->sd;202 v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);203 memcpy(state->regs, upd64031a_init, sizeof(state->regs));204 state->gr_mode = UPD64031A_GR_ON << 6;205 state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;206 state->ext_comp_sync = state->ext_vert_sync = 0;207 for (i = 0; i < TOT_REGS; i++)208 upd64031a_write(sd, i, state->regs[i]);209 return 0;210}211 212static void upd64031a_remove(struct i2c_client *client)213{214 struct v4l2_subdev *sd = i2c_get_clientdata(client);215 216 v4l2_device_unregister_subdev(sd);217}218 219/* ----------------------------------------------------------------------- */220 221static const struct i2c_device_id upd64031a_id[] = {222 { "upd64031a" },223 { }224};225MODULE_DEVICE_TABLE(i2c, upd64031a_id);226 227static struct i2c_driver upd64031a_driver = {228 .driver = {229 .name = "upd64031a",230 },231 .probe = upd64031a_probe,232 .remove = upd64031a_remove,233 .id_table = upd64031a_id,234};235 236module_i2c_driver(upd64031a_driver);237