11802d0beSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2eea85b0aSRichard Röjfors /* 3eea85b0aSRichard Röjfors * tef6862.c Philips TEF6862 Car Radio Enhanced Selectivity Tuner 4eea85b0aSRichard Röjfors * Copyright (c) 2009 Intel Corporation 5eea85b0aSRichard Röjfors */ 6eea85b0aSRichard Röjfors 7eea85b0aSRichard Röjfors #include <linux/module.h> 8eea85b0aSRichard Röjfors #include <linux/init.h> 9eea85b0aSRichard Röjfors #include <linux/errno.h> 10eea85b0aSRichard Röjfors #include <linux/kernel.h> 11eea85b0aSRichard Röjfors #include <linux/interrupt.h> 12eea85b0aSRichard Röjfors #include <linux/i2c.h> 135a0e3ad6STejun Heo #include <linux/slab.h> 14eea85b0aSRichard Röjfors #include <media/v4l2-ioctl.h> 15eea85b0aSRichard Röjfors #include <media/v4l2-device.h> 16eea85b0aSRichard Röjfors 17eea85b0aSRichard Röjfors #define DRIVER_NAME "tef6862" 18eea85b0aSRichard Röjfors 19eea85b0aSRichard Röjfors #define FREQ_MUL 16000 20eea85b0aSRichard Röjfors 21fa915996SHans Verkuil #define TEF6862_LO_FREQ (875U * FREQ_MUL / 10) 22fa915996SHans Verkuil #define TEF6862_HI_FREQ (108U * FREQ_MUL) 23eea85b0aSRichard Röjfors 24eea85b0aSRichard Röjfors /* Write mode sub addresses */ 25eea85b0aSRichard Röjfors #define WM_SUB_BANDWIDTH 0x0 26eea85b0aSRichard Röjfors #define WM_SUB_PLLM 0x1 27eea85b0aSRichard Röjfors #define WM_SUB_PLLL 0x2 28eea85b0aSRichard Röjfors #define WM_SUB_DAA 0x3 29eea85b0aSRichard Röjfors #define WM_SUB_AGC 0x4 30eea85b0aSRichard Röjfors #define WM_SUB_BAND 0x5 31eea85b0aSRichard Röjfors #define WM_SUB_CONTROL 0x6 32eea85b0aSRichard Röjfors #define WM_SUB_LEVEL 0x7 33eea85b0aSRichard Röjfors #define WM_SUB_IFCF 0x8 34eea85b0aSRichard Röjfors #define WM_SUB_IFCAP 0x9 35eea85b0aSRichard Röjfors #define WM_SUB_ACD 0xA 36eea85b0aSRichard Röjfors #define WM_SUB_TEST 0xF 37eea85b0aSRichard Röjfors 38eea85b0aSRichard Röjfors /* Different modes of the MSA register */ 395f27ca41SMauro Carvalho Chehab #define MSA_MODE_BUFFER 0x0 405f27ca41SMauro Carvalho Chehab #define MSA_MODE_PRESET 0x1 415f27ca41SMauro Carvalho Chehab #define MSA_MODE_SEARCH 0x2 425f27ca41SMauro Carvalho Chehab #define MSA_MODE_AF_UPDATE 0x3 435f27ca41SMauro Carvalho Chehab #define MSA_MODE_JUMP 0x4 445f27ca41SMauro Carvalho Chehab #define MSA_MODE_CHECK 0x5 455f27ca41SMauro Carvalho Chehab #define MSA_MODE_LOAD 0x6 465f27ca41SMauro Carvalho Chehab #define MSA_MODE_END 0x7 475f27ca41SMauro Carvalho Chehab #define MSA_MODE_SHIFT 5 48eea85b0aSRichard Röjfors 49eea85b0aSRichard Röjfors struct tef6862_state { 50eea85b0aSRichard Röjfors struct v4l2_subdev sd; 51eea85b0aSRichard Röjfors unsigned long freq; 52eea85b0aSRichard Röjfors }; 53eea85b0aSRichard Röjfors 54eea85b0aSRichard Röjfors static inline struct tef6862_state *to_state(struct v4l2_subdev *sd) 55eea85b0aSRichard Röjfors { 56eea85b0aSRichard Röjfors return container_of(sd, struct tef6862_state, sd); 57eea85b0aSRichard Röjfors } 58eea85b0aSRichard Röjfors 59eea85b0aSRichard Röjfors static u16 tef6862_sigstr(struct i2c_client *client) 60eea85b0aSRichard Röjfors { 61eea85b0aSRichard Röjfors u8 buf[4]; 62eea85b0aSRichard Röjfors int err = i2c_master_recv(client, buf, sizeof(buf)); 63eea85b0aSRichard Röjfors if (err == sizeof(buf)) 64eea85b0aSRichard Röjfors return buf[3] << 8; 65eea85b0aSRichard Röjfors return 0; 66eea85b0aSRichard Röjfors } 67eea85b0aSRichard Röjfors 68eea85b0aSRichard Röjfors static int tef6862_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v) 69eea85b0aSRichard Röjfors { 70eea85b0aSRichard Röjfors if (v->index > 0) 71eea85b0aSRichard Röjfors return -EINVAL; 72eea85b0aSRichard Röjfors 73eea85b0aSRichard Röjfors /* only support FM for now */ 74c0decac1SMauro Carvalho Chehab strscpy(v->name, "FM", sizeof(v->name)); 75eea85b0aSRichard Röjfors v->type = V4L2_TUNER_RADIO; 76eea85b0aSRichard Röjfors v->rangelow = TEF6862_LO_FREQ; 77eea85b0aSRichard Röjfors v->rangehigh = TEF6862_HI_FREQ; 78eea85b0aSRichard Röjfors v->rxsubchans = V4L2_TUNER_SUB_MONO; 79eea85b0aSRichard Röjfors v->capability = V4L2_TUNER_CAP_LOW; 80eea85b0aSRichard Röjfors v->audmode = V4L2_TUNER_MODE_STEREO; 81eea85b0aSRichard Röjfors v->signal = tef6862_sigstr(v4l2_get_subdevdata(sd)); 82eea85b0aSRichard Röjfors 83eea85b0aSRichard Röjfors return 0; 84eea85b0aSRichard Röjfors } 85eea85b0aSRichard Röjfors 862f73c7c5SHans Verkuil static int tef6862_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v) 87eea85b0aSRichard Röjfors { 88eea85b0aSRichard Röjfors return v->index ? -EINVAL : 0; 89eea85b0aSRichard Röjfors } 90eea85b0aSRichard Röjfors 91b530a447SHans Verkuil static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f) 92eea85b0aSRichard Röjfors { 93eea85b0aSRichard Röjfors struct tef6862_state *state = to_state(sd); 94eea85b0aSRichard Röjfors struct i2c_client *client = v4l2_get_subdevdata(sd); 95fa915996SHans Verkuil unsigned freq = f->frequency; 96eea85b0aSRichard Röjfors u16 pll; 97eea85b0aSRichard Röjfors u8 i2cmsg[3]; 98eea85b0aSRichard Röjfors int err; 99eea85b0aSRichard Röjfors 100eea85b0aSRichard Röjfors if (f->tuner != 0) 101eea85b0aSRichard Röjfors return -EINVAL; 102eea85b0aSRichard Röjfors 1039ba6a91fSHans Verkuil freq = clamp(freq, TEF6862_LO_FREQ, TEF6862_HI_FREQ); 104fa915996SHans Verkuil pll = 1964 + ((freq - TEF6862_LO_FREQ) * 20) / FREQ_MUL; 1055f27ca41SMauro Carvalho Chehab i2cmsg[0] = (MSA_MODE_PRESET << MSA_MODE_SHIFT) | WM_SUB_PLLM; 106eea85b0aSRichard Röjfors i2cmsg[1] = (pll >> 8) & 0xff; 107eea85b0aSRichard Röjfors i2cmsg[2] = pll & 0xff; 108eea85b0aSRichard Röjfors 109eea85b0aSRichard Röjfors err = i2c_master_send(client, i2cmsg, sizeof(i2cmsg)); 110bd93b3adSAxel Lin if (err != sizeof(i2cmsg)) 111bd93b3adSAxel Lin return err < 0 ? err : -EIO; 112bd93b3adSAxel Lin 113fa915996SHans Verkuil state->freq = freq; 114bd93b3adSAxel Lin return 0; 115eea85b0aSRichard Röjfors } 116eea85b0aSRichard Röjfors 117eea85b0aSRichard Röjfors static int tef6862_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) 118eea85b0aSRichard Röjfors { 119eea85b0aSRichard Röjfors struct tef6862_state *state = to_state(sd); 120eea85b0aSRichard Röjfors 121eea85b0aSRichard Röjfors if (f->tuner != 0) 122eea85b0aSRichard Röjfors return -EINVAL; 123eea85b0aSRichard Röjfors f->type = V4L2_TUNER_RADIO; 124eea85b0aSRichard Röjfors f->frequency = state->freq; 125eea85b0aSRichard Röjfors return 0; 126eea85b0aSRichard Röjfors } 127eea85b0aSRichard Röjfors 128eea85b0aSRichard Röjfors static const struct v4l2_subdev_tuner_ops tef6862_tuner_ops = { 129eea85b0aSRichard Röjfors .g_tuner = tef6862_g_tuner, 130eea85b0aSRichard Röjfors .s_tuner = tef6862_s_tuner, 131eea85b0aSRichard Röjfors .s_frequency = tef6862_s_frequency, 132eea85b0aSRichard Röjfors .g_frequency = tef6862_g_frequency, 133eea85b0aSRichard Röjfors }; 134eea85b0aSRichard Röjfors 135eea85b0aSRichard Röjfors static const struct v4l2_subdev_ops tef6862_ops = { 136eea85b0aSRichard Röjfors .tuner = &tef6862_tuner_ops, 137eea85b0aSRichard Röjfors }; 138eea85b0aSRichard Röjfors 139eea85b0aSRichard Röjfors /* 140eea85b0aSRichard Röjfors * Generic i2c probe 141eea85b0aSRichard Röjfors * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 142eea85b0aSRichard Röjfors */ 143eea85b0aSRichard Röjfors 1444c62e976SGreg Kroah-Hartman static int tef6862_probe(struct i2c_client *client, 145eea85b0aSRichard Röjfors const struct i2c_device_id *id) 146eea85b0aSRichard Röjfors { 147eea85b0aSRichard Röjfors struct tef6862_state *state; 148eea85b0aSRichard Röjfors struct v4l2_subdev *sd; 149eea85b0aSRichard Röjfors 150eea85b0aSRichard Röjfors /* Check if the adapter supports the needed features */ 151eea85b0aSRichard Röjfors if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 152eea85b0aSRichard Röjfors return -EIO; 153eea85b0aSRichard Röjfors 154eea85b0aSRichard Röjfors v4l_info(client, "chip found @ 0x%02x (%s)\n", 155eea85b0aSRichard Röjfors client->addr << 1, client->adapter->name); 156eea85b0aSRichard Röjfors 15780845a33SHerton Ronaldo Krzesinski state = kzalloc(sizeof(struct tef6862_state), GFP_KERNEL); 158eea85b0aSRichard Röjfors if (state == NULL) 159eea85b0aSRichard Röjfors return -ENOMEM; 160eea85b0aSRichard Röjfors state->freq = TEF6862_LO_FREQ; 161eea85b0aSRichard Röjfors 162eea85b0aSRichard Röjfors sd = &state->sd; 163eea85b0aSRichard Röjfors v4l2_i2c_subdev_init(sd, client, &tef6862_ops); 164eea85b0aSRichard Röjfors 165eea85b0aSRichard Röjfors return 0; 166eea85b0aSRichard Röjfors } 167eea85b0aSRichard Röjfors 1684c62e976SGreg Kroah-Hartman static int tef6862_remove(struct i2c_client *client) 169eea85b0aSRichard Röjfors { 170eea85b0aSRichard Röjfors struct v4l2_subdev *sd = i2c_get_clientdata(client); 171eea85b0aSRichard Röjfors 172eea85b0aSRichard Röjfors v4l2_device_unregister_subdev(sd); 173eea85b0aSRichard Röjfors kfree(to_state(sd)); 174eea85b0aSRichard Röjfors return 0; 175eea85b0aSRichard Röjfors } 176eea85b0aSRichard Röjfors 177eea85b0aSRichard Röjfors static const struct i2c_device_id tef6862_id[] = { 178eea85b0aSRichard Röjfors {DRIVER_NAME, 0}, 179eea85b0aSRichard Röjfors {}, 180eea85b0aSRichard Röjfors }; 181eea85b0aSRichard Röjfors 182eea85b0aSRichard Röjfors MODULE_DEVICE_TABLE(i2c, tef6862_id); 183eea85b0aSRichard Röjfors 184eea85b0aSRichard Röjfors static struct i2c_driver tef6862_driver = { 185eea85b0aSRichard Röjfors .driver = { 186eea85b0aSRichard Röjfors .name = DRIVER_NAME, 187eea85b0aSRichard Röjfors }, 188eea85b0aSRichard Röjfors .probe = tef6862_probe, 1894c62e976SGreg Kroah-Hartman .remove = tef6862_remove, 190eea85b0aSRichard Röjfors .id_table = tef6862_id, 191eea85b0aSRichard Röjfors }; 192eea85b0aSRichard Röjfors 193c6e8d86fSAxel Lin module_i2c_driver(tef6862_driver); 194eea85b0aSRichard Röjfors 195eea85b0aSRichard Röjfors MODULE_DESCRIPTION("TEF6862 Car Radio Enhanced Selectivity Tuner"); 196eea85b0aSRichard Röjfors MODULE_AUTHOR("Mocean Laboratories"); 197eea85b0aSRichard Röjfors MODULE_LICENSE("GPL v2"); 198