| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Fabio Belavenuto | 2000 | 83.54% | 1 | 4.00% |
| Hans Verkuil | 341 | 14.24% | 13 | 52.00% |
| Shubhrajyoti Datta | 21 | 0.88% | 1 | 4.00% |
| Mauro Carvalho Chehab | 11 | 0.46% | 3 | 12.00% |
| Paul Bolle | 9 | 0.38% | 1 | 4.00% |
| Kay Sievers | 4 | 0.17% | 1 | 4.00% |
| Tejun Heo | 3 | 0.13% | 1 | 4.00% |
| Thomas Gleixner | 2 | 0.08% | 1 | 4.00% |
| Jean Delvare | 1 | 0.04% | 1 | 4.00% |
| Bhumika Goyal | 1 | 0.04% | 1 | 4.00% |
| Axel Lin | 1 | 0.04% | 1 | 4.00% |
| Total | 2394 | 25 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * driver/media/radio/radio-tea5764.c * * Driver for TEA5764 radio chip for linux 2.6. * This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola. * The I2C protocol is used for communicate with chip. * * Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation * * Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com> * * History: * 2008-12-06 Fabio Belavenuto <belavenuto@gmail.com> * initial code * * TODO: * add platform_data support for IRQs platform dependencies * add RDS support */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/init.h> /* Initdata */ #include <linux/videodev2.h> /* kernel radio structs */ #include <linux/i2c.h> /* I2C */ #include <media/v4l2-common.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-device.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-event.h> #define DRIVER_VERSION "0.0.2" #define DRIVER_AUTHOR "Fabio Belavenuto <belavenuto@gmail.com>" #define DRIVER_DESC "A driver for the TEA5764 radio chip for EZX Phones." #define PINFO(format, ...)\ printk(KERN_INFO KBUILD_MODNAME ": "\ DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) #define PWARN(format, ...)\ printk(KERN_WARNING KBUILD_MODNAME ": "\ DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) # define PDEBUG(format, ...)\ printk(KERN_DEBUG KBUILD_MODNAME ": "\ DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) /* Frequency limits in MHz -- these are European values. For Japanese devices, that would be 76000 and 91000. */ #define FREQ_MIN 87500U #define FREQ_MAX 108000U #define FREQ_MUL 16 /* TEA5764 registers */ #define TEA5764_MANID 0x002b #define TEA5764_CHIPID 0x5764 #define TEA5764_INTREG_BLMSK 0x0001 #define TEA5764_INTREG_FRRMSK 0x0002 #define TEA5764_INTREG_LEVMSK 0x0008 #define TEA5764_INTREG_IFMSK 0x0010 #define TEA5764_INTREG_BLMFLAG 0x0100 #define TEA5764_INTREG_FRRFLAG 0x0200 #define TEA5764_INTREG_LEVFLAG 0x0800 #define TEA5764_INTREG_IFFLAG 0x1000 #define TEA5764_FRQSET_SUD 0x8000 #define TEA5764_FRQSET_SM 0x4000 #define TEA5764_TNCTRL_PUPD1 0x8000 #define TEA5764_TNCTRL_PUPD0 0x4000 #define TEA5764_TNCTRL_BLIM 0x2000 #define TEA5764_TNCTRL_SWPM 0x1000 #define TEA5764_TNCTRL_IFCTC 0x0800 #define TEA5764_TNCTRL_AFM 0x0400 #define TEA5764_TNCTRL_SMUTE 0x0200 #define TEA5764_TNCTRL_SNC 0x0100 #define TEA5764_TNCTRL_MU 0x0080 #define TEA5764_TNCTRL_SSL1 0x0040 #define TEA5764_TNCTRL_SSL0 0x0020 #define TEA5764_TNCTRL_HLSI 0x0010 #define TEA5764_TNCTRL_MST 0x0008 #define TEA5764_TNCTRL_SWP 0x0004 #define TEA5764_TNCTRL_DTC 0x0002 #define TEA5764_TNCTRL_AHLSI 0x0001 #define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4) #define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9) #define TEA5764_TUNCHK_TUNTO 0x0100 #define TEA5764_TUNCHK_LD 0x0008 #define TEA5764_TUNCHK_STEREO 0x0004 #define TEA5764_TESTREG_TRIGFR 0x0800 struct tea5764_regs { u16 intreg; /* INTFLAG & INTMSK */ u16 frqset; /* FRQSETMSB & FRQSETLSB */ u16 tnctrl; /* TNCTRL1 & TNCTRL2 */ u16 frqchk; /* FRQCHKMSB & FRQCHKLSB */ u16 tunchk; /* IFCHK & LEVCHK */ u16 testreg; /* TESTBITS & TESTMODE */ u16 rdsstat; /* RDSSTAT1 & RDSSTAT2 */ u16 rdslb; /* RDSLBMSB & RDSLBLSB */ u16 rdspb; /* RDSPBMSB & RDSPBLSB */ u16 rdsbc; /* RDSBBC & RDSGBC */ u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ u16 rdsbbl; /* PAUSEDET & RDSBBL */ u16 manid; /* MANID1 & MANID2 */ u16 chipid; /* CHIPID1 & CHIPID2 */ } __attribute__ ((packed)); struct tea5764_write_regs { u8 intreg; /* INTMSK */ __be16 frqset; /* FRQSETMSB & FRQSETLSB */ __be16 tnctrl; /* TNCTRL1 & TNCTRL2 */ __be16 testreg; /* TESTBITS & TESTMODE */ __be16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ __be16 rdsbbl; /* PAUSEDET & RDSBBL */ } __attribute__ ((packed)); #ifdef CONFIG_RADIO_TEA5764_XTAL #define RADIO_TEA5764_XTAL 1 #else #define RADIO_TEA5764_XTAL 0 #endif static int radio_nr = -1; static int use_xtal = RADIO_TEA5764_XTAL; struct tea5764_device { struct v4l2_device v4l2_dev; struct v4l2_ctrl_handler ctrl_handler; struct i2c_client *i2c_client; struct video_device vdev; struct tea5764_regs regs; struct mutex mutex; }; /* I2C code related */ static int tea5764_i2c_read(struct tea5764_device *radio) { int i; u16 *p = (u16 *) &radio->regs; struct i2c_msg msgs[1] = { { .addr = radio->i2c_client->addr, .flags = I2C_M_RD, .len = sizeof(radio->regs), .buf = (void *)&radio->regs }, }; if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) return -EIO; for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++) p[i] = __be16_to_cpu((__force __be16)p[i]); return 0; } static int tea5764_i2c_write(struct tea5764_device *radio) { struct tea5764_write_regs wr; struct tea5764_regs *r = &radio->regs; struct i2c_msg msgs[1] = { { .addr = radio->i2c_client->addr, .len = sizeof(wr), .buf = (void *)&wr }, }; wr.intreg = r->intreg & 0xff; wr.frqset = __cpu_to_be16(r->frqset); wr.tnctrl = __cpu_to_be16(r->tnctrl); wr.testreg = __cpu_to_be16(r->testreg); wr.rdsctrl = __cpu_to_be16(r->rdsctrl); wr.rdsbbl = __cpu_to_be16(r->rdsbbl); if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) return -EIO; return 0; } static void tea5764_power_up(struct tea5764_device *radio) { struct tea5764_regs *r = &radio->regs; if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) { r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU | TEA5764_TNCTRL_HLSI); if (!use_xtal) r->testreg |= TEA5764_TESTREG_TRIGFR; else r->testreg &= ~TEA5764_TESTREG_TRIGFR; r->tnctrl |= TEA5764_TNCTRL_PUPD0; tea5764_i2c_write(radio); } } static void tea5764_power_down(struct tea5764_device *radio) { struct tea5764_regs *r = &radio->regs; if (r->tnctrl & TEA5764_TNCTRL_PUPD0) { r->tnctrl &= ~TEA5764_TNCTRL_PUPD0; tea5764_i2c_write(radio); } } static void tea5764_set_freq(struct tea5764_device *radio, int freq) { struct tea5764_regs *r = &radio->regs; /* formula: (freq [+ or -] 225000) / 8192 */ if (r->tnctrl & TEA5764_TNCTRL_HLSI) r->frqset = (freq + 225000) / 8192; else r->frqset = (freq - 225000) / 8192; } static int tea5764_get_freq(struct tea5764_device *radio) { struct tea5764_regs *r = &radio->regs; if (r->tnctrl & TEA5764_TNCTRL_HLSI) return (r->frqchk * 8192) - 225000; else return (r->frqchk * 8192) + 225000; } /* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ static void tea5764_tune(struct tea5764_device *radio, int freq) { tea5764_set_freq(radio, freq); if (tea5764_i2c_write(radio)) PWARN("Could not set frequency!"); } static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode) { struct tea5764_regs *r = &radio->regs; int tnctrl = r->tnctrl; if (audmode == V4L2_TUNER_MODE_MONO) r->tnctrl |= TEA5764_TNCTRL_MST; else r->tnctrl &= ~TEA5764_TNCTRL_MST; if (tnctrl != r->tnctrl) tea5764_i2c_write(radio); } static int tea5764_get_audout_mode(struct tea5764_device *radio) { struct tea5764_regs *r = &radio->regs; if (r->tnctrl & TEA5764_TNCTRL_MST) return V4L2_TUNER_MODE_MONO; else return V4L2_TUNER_MODE_STEREO; } static void tea5764_mute(struct tea5764_device *radio, int on) { struct tea5764_regs *r = &radio->regs; int tnctrl = r->tnctrl; if (on) r->tnctrl |= TEA5764_TNCTRL_MU; else r->tnctrl &= ~TEA5764_TNCTRL_MU; if (tnctrl != r->tnctrl) tea5764_i2c_write(radio); } /* V4L2 vidioc */ static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *v) { struct tea5764_device *radio = video_drvdata(file); struct video_device *dev = &radio->vdev; strscpy(v->driver, dev->dev.driver->name, sizeof(v->driver)); strscpy(v->card, dev->name, sizeof(v->card)); snprintf(v->bus_info, sizeof(v->bus_info), "I2C:%s", dev_name(&dev->dev)); return 0; } static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { struct tea5764_device *radio = video_drvdata(file); struct tea5764_regs *r = &radio->regs; if (v->index > 0) return -EINVAL; strscpy(v->name, "FM", sizeof(v->name)); v->type = V4L2_TUNER_RADIO; tea5764_i2c_read(radio); v->rangelow = FREQ_MIN * FREQ_MUL; v->rangehigh = FREQ_MAX * FREQ_MUL; v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; if (r->tunchk & TEA5764_TUNCHK_STEREO) v->rxsubchans = V4L2_TUNER_SUB_STEREO; else v->rxsubchans = V4L2_TUNER_SUB_MONO; v->audmode = tea5764_get_audout_mode(radio); v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf; v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk); return 0; } static int vidioc_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *v) { struct tea5764_device *radio = video_drvdata(file); if (v->index > 0) return -EINVAL; tea5764_set_audout_mode(radio, v->audmode); return 0; } static int vidioc_s_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { struct tea5764_device *radio = video_drvdata(file); unsigned freq = f->frequency; if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) return -EINVAL; if (freq == 0) { /* We special case this as a power down control. */ tea5764_power_down(radio); /* Yes, that's what is returned in this case. This whole special case is non-compliant and should really be replaced with something better, but changing this might well break code that depends on this behavior. So we keep it as-is. */ return -EINVAL; } freq = clamp(freq, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL); tea5764_power_up(radio); tea5764_tune(radio, (freq * 125) / 2); return 0; } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { struct tea5764_device *radio = video_drvdata(file); struct tea5764_regs *r = &radio->regs; if (f->tuner != 0) return -EINVAL; tea5764_i2c_read(radio); f->type = V4L2_TUNER_RADIO; if (r->tnctrl & TEA5764_TNCTRL_PUPD0) f->frequency = (tea5764_get_freq(radio) * 2) / 125; else f->frequency = 0; return 0; } static int tea5764_s_ctrl(struct v4l2_ctrl *ctrl) { struct tea5764_device *radio = container_of(ctrl->handler, struct tea5764_device, ctrl_handler); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: tea5764_mute(radio, ctrl->val); return 0; } return -EINVAL; } static const struct v4l2_ctrl_ops tea5764_ctrl_ops = { .s_ctrl = tea5764_s_ctrl, }; /* File system interface */ static const struct v4l2_file_operations tea5764_fops = { .owner = THIS_MODULE, .open = v4l2_fh_open, .release = v4l2_fh_release, .poll = v4l2_ctrl_poll, .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops tea5764_ioctl_ops = { .vidioc_querycap = vidioc_querycap, .vidioc_g_tuner = vidioc_g_tuner, .vidioc_s_tuner = vidioc_s_tuner, .vidioc_g_frequency = vidioc_g_frequency, .vidioc_s_frequency = vidioc_s_frequency, .vidioc_log_status = v4l2_ctrl_log_status, .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; /* V4L2 interface */ static const struct video_device tea5764_radio_template = { .name = "TEA5764 FM-Radio", .fops = &tea5764_fops, .ioctl_ops = &tea5764_ioctl_ops, .release = video_device_release_empty, }; /* I2C probe: check if the device exists and register with v4l if it is */ static int tea5764_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tea5764_device *radio; struct v4l2_device *v4l2_dev; struct v4l2_ctrl_handler *hdl; struct tea5764_regs *r; int ret; PDEBUG("probe"); radio = kzalloc(sizeof(struct tea5764_device), GFP_KERNEL); if (!radio) return -ENOMEM; v4l2_dev = &radio->v4l2_dev; ret = v4l2_device_register(&client->dev, v4l2_dev); if (ret < 0) { v4l2_err(v4l2_dev, "could not register v4l2_device\n"); goto errfr; } hdl = &radio->ctrl_handler; v4l2_ctrl_handler_init(hdl, 1); v4l2_ctrl_new_std(hdl, &tea5764_ctrl_ops, V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); v4l2_dev->ctrl_handler = hdl; if (hdl->error) { ret = hdl->error; v4l2_err(v4l2_dev, "Could not register controls\n"); goto errunreg; } mutex_init(&radio->mutex); radio->i2c_client = client; ret = tea5764_i2c_read(radio); if (ret) goto errunreg; r = &radio->regs; PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid); if (r->chipid != TEA5764_CHIPID || (r->manid & 0x0fff) != TEA5764_MANID) { PWARN("This chip is not a TEA5764!"); ret = -EINVAL; goto errunreg; } radio->vdev = tea5764_radio_template; i2c_set_clientdata(client, radio); video_set_drvdata(&radio->vdev, radio); radio->vdev.lock = &radio->mutex; radio->vdev.v4l2_dev = v4l2_dev; radio->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; /* initialize and power off the chip */ tea5764_i2c_read(radio); tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO); tea5764_mute(radio, 1); tea5764_power_down(radio); ret = video_register_device(&radio->vdev, VFL_TYPE_RADIO, radio_nr); if (ret < 0) { PWARN("Could not register video device!"); goto errunreg; } PINFO("registered."); return 0; errunreg: v4l2_ctrl_handler_free(hdl); v4l2_device_unregister(v4l2_dev); errfr: kfree(radio); return ret; } static int tea5764_i2c_remove(struct i2c_client *client) { struct tea5764_device *radio = i2c_get_clientdata(client); PDEBUG("remove"); if (radio) { tea5764_power_down(radio); video_unregister_device(&radio->vdev); v4l2_ctrl_handler_free(&radio->ctrl_handler); v4l2_device_unregister(&radio->v4l2_dev); kfree(radio); } return 0; } /* I2C subsystem interface */ static const struct i2c_device_id tea5764_id[] = { { "radio-tea5764", 0 }, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE(i2c, tea5764_id); static struct i2c_driver tea5764_i2c_driver = { .driver = { .name = "radio-tea5764", }, .probe = tea5764_i2c_probe, .remove = tea5764_i2c_remove, .id_table = tea5764_id, }; module_i2c_driver(tea5764_i2c_driver); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_VERSION(DRIVER_VERSION); module_param(use_xtal, int, 0); MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board"); module_param(radio_nr, int, 0); MODULE_PARM_DESC(radio_nr, "video4linux device number to use");
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