^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) tda9840 - i2c-driver for the tda9840 by SGS Thomson
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) The tda9840 is a stereo/dual sound processor with digital
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) identification. It can be found at address 0x84 on the i2c-bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) For detailed information download the specifications directly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) from SGS Thomson at http://www.st.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <media/v4l2-device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) MODULE_DESCRIPTION("tda9840 driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static int debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) module_param(debug, int, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) MODULE_PARM_DESC(debug, "Debug level (0-1)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define SWITCH 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define LEVEL_ADJUST 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define STEREO_ADJUST 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define TEST 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define TDA9840_SET_MUTE 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define TDA9840_SET_MONO 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define TDA9840_SET_STEREO 0x2a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define TDA9840_SET_LANG1 0x12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define TDA9840_SET_LANG2 0x1e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define TDA9840_SET_BOTH 0x1a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define TDA9840_SET_BOTH_R 0x16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define TDA9840_SET_EXTERNAL 0x7a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static void tda9840_write(struct v4l2_subdev *sd, u8 reg, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct i2c_client *client = v4l2_get_subdevdata(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (i2c_smbus_write_byte_data(client, reg, val))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) v4l2_dbg(1, debug, sd, "error writing %02x to %02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) val, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int tda9840_status(struct v4l2_subdev *sd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct i2c_client *client = v4l2_get_subdevdata(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) u8 byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) rc = i2c_master_recv(client, &byte, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (rc != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) v4l2_dbg(1, debug, sd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) "i2c_master_recv() failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (byte & 0x80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) v4l2_dbg(1, debug, sd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) "TDA9840_DETECT: register contents invalid\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) v4l2_dbg(1, debug, sd, "TDA9840_DETECT: byte: 0x%02x\n", byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return byte & 0x60;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int tda9840_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) int stat = tda9840_status(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (t->index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) stat = stat < 0 ? 0 : stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (stat == 0 || stat == 0x60) /* mono input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) byte = TDA9840_SET_MONO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) else if (stat == 0x40) /* stereo input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) byte = (t->audmode == V4L2_TUNER_MODE_MONO) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) TDA9840_SET_MONO : TDA9840_SET_STEREO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) else { /* bilingual */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) switch (t->audmode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) case V4L2_TUNER_MODE_LANG1_LANG2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) byte = TDA9840_SET_BOTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) case V4L2_TUNER_MODE_LANG2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) byte = TDA9840_SET_LANG2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) byte = TDA9840_SET_LANG1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) v4l2_dbg(1, debug, sd, "TDA9840_SWITCH: 0x%02x\n", byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) tda9840_write(sd, SWITCH, byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) int stat = tda9840_status(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (stat < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) t->rxsubchans = V4L2_TUNER_SUB_MONO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) switch (stat & 0x60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) case 0x00:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) t->rxsubchans = V4L2_TUNER_SUB_MONO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) case 0x20:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) t->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case 0x40:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) t->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) default: /* Incorrect detect */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) t->rxsubchans = V4L2_TUNER_MODE_MONO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* ----------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static const struct v4l2_subdev_tuner_ops tda9840_tuner_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .s_tuner = tda9840_s_tuner,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .g_tuner = tda9840_g_tuner,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static const struct v4l2_subdev_ops tda9840_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .tuner = &tda9840_tuner_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /* ----------------------------------------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static int tda9840_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct v4l2_subdev *sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* let's see whether this adapter can support what we need */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) I2C_FUNC_SMBUS_READ_BYTE_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) v4l_info(client, "chip found @ 0x%x (%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) client->addr << 1, client->adapter->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (sd == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) v4l2_i2c_subdev_init(sd, client, &tda9840_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* set initial values for level & stereo - adjustment, mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) tda9840_write(sd, LEVEL_ADJUST, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) tda9840_write(sd, STEREO_ADJUST, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) tda9840_write(sd, SWITCH, TDA9840_SET_STEREO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static int tda9840_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct v4l2_subdev *sd = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) v4l2_device_unregister_subdev(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static const struct i2c_device_id tda9840_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) { "tda9840", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) MODULE_DEVICE_TABLE(i2c, tda9840_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static struct i2c_driver tda9840_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .name = "tda9840",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .probe = tda9840_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .remove = tda9840_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .id_table = tda9840_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) module_i2c_driver(tda9840_driver);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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