208 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver4 *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#include <linux/module.h>11#include <linux/kernel.h>12#include <linux/i2c.h>13#include <linux/videodev2.h>14#include <linux/slab.h>15#include <media/v4l2-device.h>16#include <media/i2c/upd64083.h>17 18MODULE_DESCRIPTION("uPD64083 driver");19MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");20MODULE_LICENSE("GPL");21 22static bool debug;23module_param(debug, bool, 0644);24 25MODULE_PARM_DESC(debug, "Debug level (0-1)");26 27 28enum {29 R00 = 0, R01, R02, R03, R04,30 R05, R06, R07, R08, R09,31 R0A, R0B, R0C, R0D, R0E, R0F,32 R10, R11, R12, R13, R14,33 R15, R16,34 TOT_REGS35};36 37struct upd64083_state {38 struct v4l2_subdev sd;39 u8 mode;40 u8 ext_y_adc;41 u8 regs[TOT_REGS];42};43 44static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)45{46 return container_of(sd, struct upd64083_state, sd);47}48 49/* Initial values when used in combination with the50 NEC upd64031a ghost reduction chip. */51static u8 upd64083_init[] = {52 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */53 0x36, 0xdd, 0x05, 0x56, 0x48,54 0x00, 0x3a, 0xa0, 0x05, 0x08,55 0x44, 0x60, 0x08, 0x52, 0xf8,56 0x53, 0x60, 0x1057};58 59/* ------------------------------------------------------------------------ */60 61static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)62{63 struct i2c_client *client = v4l2_get_subdevdata(sd);64 u8 buf[2];65 66 buf[0] = reg;67 buf[1] = val;68 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);69 if (i2c_master_send(client, buf, 2) != 2)70 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);71}72 73/* ------------------------------------------------------------------------ */74 75#ifdef CONFIG_VIDEO_ADV_DEBUG76static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)77{78 struct i2c_client *client = v4l2_get_subdevdata(sd);79 u8 buf[7];80 81 if (reg >= sizeof(buf))82 return 0xff;83 i2c_master_recv(client, buf, sizeof(buf));84 return buf[reg];85}86#endif87 88/* ------------------------------------------------------------------------ */89 90static int upd64083_s_routing(struct v4l2_subdev *sd,91 u32 input, u32 output, u32 config)92{93 struct upd64083_state *state = to_state(sd);94 u8 r00, r02;95 96 if (input > 7 || (input & 6) == 6)97 return -EINVAL;98 state->mode = (input & 3) << 6;99 state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;100 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;101 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;102 upd64083_write(sd, R00, r00);103 upd64083_write(sd, R02, r02);104 return 0;105}106 107#ifdef CONFIG_VIDEO_ADV_DEBUG108static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)109{110 reg->val = upd64083_read(sd, reg->reg & 0xff);111 reg->size = 1;112 return 0;113}114 115static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)116{117 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);118 return 0;119}120#endif121 122static int upd64083_log_status(struct v4l2_subdev *sd)123{124 struct i2c_client *client = v4l2_get_subdevdata(sd);125 u8 buf[7];126 127 i2c_master_recv(client, buf, 7);128 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "129 "SA04=%02x SA05=%02x SA06=%02x\n",130 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);131 return 0;132}133 134/* ----------------------------------------------------------------------- */135 136static const struct v4l2_subdev_core_ops upd64083_core_ops = {137 .log_status = upd64083_log_status,138#ifdef CONFIG_VIDEO_ADV_DEBUG139 .g_register = upd64083_g_register,140 .s_register = upd64083_s_register,141#endif142};143 144static const struct v4l2_subdev_video_ops upd64083_video_ops = {145 .s_routing = upd64083_s_routing,146};147 148static const struct v4l2_subdev_ops upd64083_ops = {149 .core = &upd64083_core_ops,150 .video = &upd64083_video_ops,151};152 153/* ------------------------------------------------------------------------ */154 155/* i2c implementation */156 157static int upd64083_probe(struct i2c_client *client)158{159 struct upd64083_state *state;160 struct v4l2_subdev *sd;161 int i;162 163 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))164 return -EIO;165 166 v4l_info(client, "chip found @ 0x%x (%s)\n",167 client->addr << 1, client->adapter->name);168 169 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);170 if (state == NULL)171 return -ENOMEM;172 sd = &state->sd;173 v4l2_i2c_subdev_init(sd, client, &upd64083_ops);174 /* Initially assume that a ghost reduction chip is present */175 state->mode = 0; /* YCS mode */176 state->ext_y_adc = (1 << 5);177 memcpy(state->regs, upd64083_init, TOT_REGS);178 for (i = 0; i < TOT_REGS; i++)179 upd64083_write(sd, i, state->regs[i]);180 return 0;181}182 183static void upd64083_remove(struct i2c_client *client)184{185 struct v4l2_subdev *sd = i2c_get_clientdata(client);186 187 v4l2_device_unregister_subdev(sd);188}189 190/* ----------------------------------------------------------------------- */191 192static const struct i2c_device_id upd64083_id[] = {193 { "upd64083" },194 { }195};196MODULE_DEVICE_TABLE(i2c, upd64083_id);197 198static struct i2c_driver upd64083_driver = {199 .driver = {200 .name = "upd64083",201 },202 .probe = upd64083_probe,203 .remove = upd64083_remove,204 .id_table = upd64083_id,205};206 207module_i2c_driver(upd64083_driver);208