1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver 4 * 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 18 MODULE_DESCRIPTION("uPD64083 driver"); 19 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); 20 MODULE_LICENSE("GPL"); 21 22 static bool debug; 23 module_param(debug, bool, 0644); 24 25 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 26 27 28 enum { 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_REGS 35 }; 36 37 struct upd64083_state { 38 struct v4l2_subdev sd; 39 u8 mode; 40 u8 ext_y_adc; 41 u8 regs[TOT_REGS]; 42 }; 43 44 static 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 the 50 NEC upd64031a ghost reduction chip. */ 51 static 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, 0x10 57 }; 58 59 /* ------------------------------------------------------------------------ */ 60 61 static 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_DEBUG 76 static 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 #endif 87 88 /* ------------------------------------------------------------------------ */ 89 90 static 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_DEBUG 108 static 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 } 114 115 static 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 #endif 121 122 static 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 /* ----------------------------------------------------------------------- */ 135 136 static const struct v4l2_subdev_core_ops upd64083_core_ops = { 137 .log_status = upd64083_log_status, 138 #ifdef CONFIG_VIDEO_ADV_DEBUG 139 .g_register = upd64083_g_register, 140 .s_register = upd64083_s_register, 141 #endif 142 }; 143 144 static const struct v4l2_subdev_video_ops upd64083_video_ops = { 145 .s_routing = upd64083_s_routing, 146 }; 147 148 static const struct v4l2_subdev_ops upd64083_ops = { 149 .core = &upd64083_core_ops, 150 .video = &upd64083_video_ops, 151 }; 152 153 /* ------------------------------------------------------------------------ */ 154 155 /* i2c implementation */ 156 157 static 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 } 182 183 static 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 /* ----------------------------------------------------------------------- */ 191 192 static const struct i2c_device_id upd64083_id[] = { 193 { "upd64083", 0 }, 194 { } 195 }; 196 MODULE_DEVICE_TABLE(i2c, upd64083_id); 197 198 static 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 }; 206 207 module_i2c_driver(upd64083_driver); 208