^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * tef6862.c Philips TEF6862 Car Radio Enhanced Selectivity Tuner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2009 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <media/v4l2-ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <media/v4l2-device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define DRIVER_NAME "tef6862"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define FREQ_MUL 16000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define TEF6862_LO_FREQ (875U * FREQ_MUL / 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define TEF6862_HI_FREQ (108U * FREQ_MUL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* Write mode sub addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define WM_SUB_BANDWIDTH 0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define WM_SUB_PLLM 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define WM_SUB_PLLL 0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define WM_SUB_DAA 0x3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define WM_SUB_AGC 0x4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define WM_SUB_BAND 0x5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define WM_SUB_CONTROL 0x6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define WM_SUB_LEVEL 0x7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define WM_SUB_IFCF 0x8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define WM_SUB_IFCAP 0x9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define WM_SUB_ACD 0xA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define WM_SUB_TEST 0xF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* Different modes of the MSA register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define MSA_MODE_BUFFER 0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define MSA_MODE_PRESET 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define MSA_MODE_SEARCH 0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define MSA_MODE_AF_UPDATE 0x3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define MSA_MODE_JUMP 0x4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define MSA_MODE_CHECK 0x5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define MSA_MODE_LOAD 0x6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define MSA_MODE_END 0x7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define MSA_MODE_SHIFT 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct tef6862_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct v4l2_subdev sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned long freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static inline struct tef6862_state *to_state(struct v4l2_subdev *sd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return container_of(sd, struct tef6862_state, sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static u16 tef6862_sigstr(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u8 buf[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int err = i2c_master_recv(client, buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (err == sizeof(buf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return buf[3] << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int tef6862_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (v->index > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* only support FM for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) strscpy(v->name, "FM", sizeof(v->name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) v->type = V4L2_TUNER_RADIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) v->rangelow = TEF6862_LO_FREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) v->rangehigh = TEF6862_HI_FREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) v->rxsubchans = V4L2_TUNER_SUB_MONO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) v->capability = V4L2_TUNER_CAP_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) v->audmode = V4L2_TUNER_MODE_STEREO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) v->signal = tef6862_sigstr(v4l2_get_subdevdata(sd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static int tef6862_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return v->index ? -EINVAL : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct tef6862_state *state = to_state(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct i2c_client *client = v4l2_get_subdevdata(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned freq = f->frequency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) u16 pll;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) u8 i2cmsg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (f->tuner != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) freq = clamp(freq, TEF6862_LO_FREQ, TEF6862_HI_FREQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) pll = 1964 + ((freq - TEF6862_LO_FREQ) * 20) / FREQ_MUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) i2cmsg[0] = (MSA_MODE_PRESET << MSA_MODE_SHIFT) | WM_SUB_PLLM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) i2cmsg[1] = (pll >> 8) & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) i2cmsg[2] = pll & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) err = i2c_master_send(client, i2cmsg, sizeof(i2cmsg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (err != sizeof(i2cmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return err < 0 ? err : -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) state->freq = freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int tef6862_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct tef6862_state *state = to_state(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (f->tuner != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) f->type = V4L2_TUNER_RADIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) f->frequency = state->freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static const struct v4l2_subdev_tuner_ops tef6862_tuner_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .g_tuner = tef6862_g_tuner,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .s_tuner = tef6862_s_tuner,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .s_frequency = tef6862_s_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .g_frequency = tef6862_g_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static const struct v4l2_subdev_ops tef6862_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .tuner = &tef6862_tuner_ops,
^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) * Generic i2c probe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static int tef6862_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct tef6862_state *state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct v4l2_subdev *sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /* Check if the adapter supports the needed features */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) v4l_info(client, "chip found @ 0x%02x (%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) client->addr << 1, client->adapter->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) state = kzalloc(sizeof(struct tef6862_state), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (state == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) state->freq = TEF6862_LO_FREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) sd = &state->sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) v4l2_i2c_subdev_init(sd, client, &tef6862_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static int tef6862_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct v4l2_subdev *sd = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) v4l2_device_unregister_subdev(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) kfree(to_state(sd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static const struct i2c_device_id tef6862_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {DRIVER_NAME, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) MODULE_DEVICE_TABLE(i2c, tef6862_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static struct i2c_driver tef6862_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .name = DRIVER_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) .probe = tef6862_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) .remove = tef6862_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) .id_table = tef6862_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) module_i2c_driver(tef6862_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) MODULE_DESCRIPTION("TEF6862 Car Radio Enhanced Selectivity Tuner");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) MODULE_AUTHOR("Mocean Laboratories");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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