| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hans Verkuil | 2033 | 78.65% | 10 | 66.67% |
| Krzysztof Helt | 542 | 20.97% | 1 | 6.67% |
| Mauro Carvalho Chehab | 5 | 0.19% | 1 | 6.67% |
| Randy Dunlap | 3 | 0.12% | 1 | 6.67% |
| Thomas Gleixner | 1 | 0.04% | 1 | 6.67% |
| Wei Yongjun | 1 | 0.04% | 1 | 6.67% |
| Total | 2585 | 15 |
// SPDX-License-Identifier: GPL-2.0-only /* * Miro PCM20 radio driver for Linux radio support * (c) 1998 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl> * Thanks to Norberto Pellici for the ACI device interface specification * The API part is based on the radiotrack driver by M. Kirkwood * This driver relies on the aci mixer provided by the snd-miro * ALSA driver. * Look there for further info... * * From the original miro RDS sources: * * (c) 2001 Robert Siemer <Robert.Siemer@gmx.de> * * Many thanks to Fred Seidel <seidel@metabox.de>, the * designer of the RDS decoder hardware. With his help * I was able to code this driver. * Thanks also to Norberto Pellicci, Dominic Mounteney * <DMounteney@pinnaclesys.com> and www.teleauskunft.de * for good hints on finding Fred. It was somewhat hard * to locate him here in Germany... [: * * This code has been reintroduced and converted to use * the new V4L2 RDS API by: * * Hans Verkuil <hans.verkuil@cisco.com> */ #include <linux/module.h> #include <linux/init.h> #include <linux/io.h> #include <linux/delay.h> #include <linux/videodev2.h> #include <linux/kthread.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-fh.h> #include <media/v4l2-event.h> #include <sound/aci.h> #define RDS_DATASHIFT 2 /* Bit 2 */ #define RDS_DATAMASK (1 << RDS_DATASHIFT) #define RDS_BUSYMASK 0x10 /* Bit 4 */ #define RDS_CLOCKMASK 0x08 /* Bit 3 */ #define RDS_DATA(x) (((x) >> RDS_DATASHIFT) & 1) #define RDS_STATUS 0x01 #define RDS_STATIONNAME 0x02 #define RDS_TEXT 0x03 #define RDS_ALTFREQ 0x04 #define RDS_TIMEDATE 0x05 #define RDS_PI_CODE 0x06 #define RDS_PTYTATP 0x07 #define RDS_RESET 0x08 #define RDS_RXVALUE 0x09 static int radio_nr = -1; module_param(radio_nr, int, 0); MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)"); struct pcm20 { struct v4l2_device v4l2_dev; struct video_device vdev; struct v4l2_ctrl_handler ctrl_handler; struct v4l2_ctrl *rds_pty; struct v4l2_ctrl *rds_ps_name; struct v4l2_ctrl *rds_radio_test; struct v4l2_ctrl *rds_ta; struct v4l2_ctrl *rds_tp; struct v4l2_ctrl *rds_ms; /* thread for periodic RDS status checking */ struct task_struct *kthread; unsigned long freq; u32 audmode; struct snd_miro_aci *aci; struct mutex lock; }; static struct pcm20 pcm20_card = { .freq = 87 * 16000, .audmode = V4L2_TUNER_MODE_STEREO, }; static int rds_waitread(struct snd_miro_aci *aci) { u8 byte; int i = 2000; do { byte = inb(aci->aci_port + ACI_REG_RDS); i--; } while ((byte & RDS_BUSYMASK) && i); /* * It's magic, but without this the data that you read later on * is unreliable and full of bit errors. With this 1 usec delay * everything is fine. */ udelay(1); return i ? byte : -1; } static int rds_rawwrite(struct snd_miro_aci *aci, u8 byte) { if (rds_waitread(aci) >= 0) { outb(byte, aci->aci_port + ACI_REG_RDS); return 0; } return -1; } static int rds_write(struct snd_miro_aci *aci, u8 byte) { u8 sendbuffer[8]; int i; for (i = 7; i >= 0; i--) sendbuffer[7 - i] = (byte & (1 << i)) ? RDS_DATAMASK : 0; sendbuffer[0] |= RDS_CLOCKMASK; for (i = 0; i < 8; i++) rds_rawwrite(aci, sendbuffer[i]); return 0; } static int rds_readcycle_nowait(struct snd_miro_aci *aci) { outb(0, aci->aci_port + ACI_REG_RDS); return rds_waitread(aci); } static int rds_readcycle(struct snd_miro_aci *aci) { if (rds_rawwrite(aci, 0) < 0) return -1; return rds_waitread(aci); } static int rds_ack(struct snd_miro_aci *aci) { int i = rds_readcycle(aci); if (i < 0) return -1; if (i & RDS_DATAMASK) return 0; /* ACK */ return 1; /* NACK */ } static int rds_cmd(struct snd_miro_aci *aci, u8 cmd, u8 databuffer[], u8 datasize) { int i, j; rds_write(aci, cmd); /* RDS_RESET doesn't need further processing */ if (cmd == RDS_RESET) return 0; if (rds_ack(aci)) return -EIO; if (datasize == 0) return 0; /* to be able to use rds_readcycle_nowait() I have to waitread() here */ if (rds_waitread(aci) < 0) return -1; memset(databuffer, 0, datasize); for (i = 0; i < 8 * datasize; i++) { j = rds_readcycle_nowait(aci); if (j < 0) return -EIO; databuffer[i / 8] |= RDS_DATA(j) << (7 - (i % 8)); } return 0; } static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq) { unsigned char freql; unsigned char freqh; struct snd_miro_aci *aci = dev->aci; freq /= 160; if (!(aci->aci_version == 0x07 || aci->aci_version >= 0xb0)) freq /= 10; /* I don't know exactly which version * needs this hack */ freql = freq & 0xff; freqh = freq >> 8; rds_cmd(aci, RDS_RESET, NULL, 0); return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh); } static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *v) { struct pcm20 *dev = video_drvdata(file); strscpy(v->driver, "Miro PCM20", sizeof(v->driver)); strscpy(v->card, "Miro PCM20", sizeof(v->card)); snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name); return 0; } static bool sanitize(char *p, int size) { int i; bool ret = true; for (i = 0; i < size; i++) { if (p[i] < 32) { p[i] = ' '; ret = false; } } return ret; } static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { struct pcm20 *dev = video_drvdata(file); int res; u8 buf; if (v->index) return -EINVAL; strscpy(v->name, "FM", sizeof(v->name)); v->type = V4L2_TUNER_RADIO; v->rangelow = 87*16000; v->rangehigh = 108*16000; res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTATION, -1, -1); v->signal = (res & 0x80) ? 0 : 0xffff; /* Note: stereo detection does not work if the audio is muted, it will default to mono in that case. */ res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTEREO, -1, -1); v->rxsubchans = (res & 0x40) ? V4L2_TUNER_SUB_MONO : V4L2_TUNER_SUB_STEREO; v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_CONTROLS; v->audmode = dev->audmode; res = rds_cmd(dev->aci, RDS_RXVALUE, &buf, 1); if (res >= 0 && buf) v->rxsubchans |= V4L2_TUNER_SUB_RDS; return 0; } static int vidioc_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *v) { struct pcm20 *dev = video_drvdata(file); if (v->index) return -EINVAL; if (v->audmode > V4L2_TUNER_MODE_STEREO) dev->audmode = V4L2_TUNER_MODE_STEREO; else dev->audmode = v->audmode; snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, dev->audmode == V4L2_TUNER_MODE_MONO, -1); return 0; } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { struct pcm20 *dev = video_drvdata(file); if (f->tuner != 0) return -EINVAL; f->type = V4L2_TUNER_RADIO; f->frequency = dev->freq; return 0; } static int vidioc_s_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { struct pcm20 *dev = video_drvdata(file); if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) return -EINVAL; dev->freq = clamp_t(u32, f->frequency, 87 * 16000U, 108 * 16000U); pcm20_setfreq(dev, dev->freq); return 0; } static int pcm20_s_ctrl(struct v4l2_ctrl *ctrl) { struct pcm20 *dev = container_of(ctrl->handler, struct pcm20, ctrl_handler); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, ctrl->val, -1); return 0; } return -EINVAL; } static int pcm20_thread(void *data) { struct pcm20 *dev = data; const unsigned no_rds_start_counter = 5; const unsigned sleep_msecs = 2000; unsigned no_rds_counter = no_rds_start_counter; for (;;) { char text_buffer[66]; u8 buf; int res; msleep_interruptible(sleep_msecs); if (kthread_should_stop()) break; res = rds_cmd(dev->aci, RDS_RXVALUE, &buf, 1); if (res) continue; if (buf == 0) { if (no_rds_counter == 0) continue; no_rds_counter--; if (no_rds_counter) continue; /* * No RDS seen for no_rds_start_counter * sleep_msecs * milliseconds, clear all RDS controls to their * default values. */ v4l2_ctrl_s_ctrl_string(dev->rds_ps_name, ""); v4l2_ctrl_s_ctrl(dev->rds_ms, 1); v4l2_ctrl_s_ctrl(dev->rds_ta, 0); v4l2_ctrl_s_ctrl(dev->rds_tp, 0); v4l2_ctrl_s_ctrl(dev->rds_pty, 0); v4l2_ctrl_s_ctrl_string(dev->rds_radio_test, ""); continue; } no_rds_counter = no_rds_start_counter; res = rds_cmd(dev->aci, RDS_STATUS, &buf, 1); if (res) continue; if ((buf >> 3) & 1) { res = rds_cmd(dev->aci, RDS_STATIONNAME, text_buffer, 8); text_buffer[8] = 0; if (!res && sanitize(text_buffer, 8)) v4l2_ctrl_s_ctrl_string(dev->rds_ps_name, text_buffer); } if ((buf >> 6) & 1) { u8 pty; res = rds_cmd(dev->aci, RDS_PTYTATP, &pty, 1); if (!res) { v4l2_ctrl_s_ctrl(dev->rds_ms, !!(pty & 0x01)); v4l2_ctrl_s_ctrl(dev->rds_ta, !!(pty & 0x02)); v4l2_ctrl_s_ctrl(dev->rds_tp, !!(pty & 0x80)); v4l2_ctrl_s_ctrl(dev->rds_pty, (pty >> 2) & 0x1f); } } if ((buf >> 4) & 1) { res = rds_cmd(dev->aci, RDS_TEXT, text_buffer, 65); text_buffer[65] = 0; if (!res && sanitize(text_buffer + 1, 64)) v4l2_ctrl_s_ctrl_string(dev->rds_radio_test, text_buffer + 1); } } return 0; } static int pcm20_open(struct file *file) { struct pcm20 *dev = video_drvdata(file); int res = v4l2_fh_open(file); if (!res && v4l2_fh_is_singular_file(file) && IS_ERR_OR_NULL(dev->kthread)) { dev->kthread = kthread_run(pcm20_thread, dev, "%s", dev->v4l2_dev.name); if (IS_ERR(dev->kthread)) { v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n"); v4l2_fh_release(file); return PTR_ERR(dev->kthread); } } return res; } static int pcm20_release(struct file *file) { struct pcm20 *dev = video_drvdata(file); if (v4l2_fh_is_singular_file(file) && !IS_ERR_OR_NULL(dev->kthread)) { kthread_stop(dev->kthread); dev->kthread = NULL; } return v4l2_fh_release(file); } static const struct v4l2_file_operations pcm20_fops = { .owner = THIS_MODULE, .open = pcm20_open, .poll = v4l2_ctrl_poll, .release = pcm20_release, .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops pcm20_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, }; static const struct v4l2_ctrl_ops pcm20_ctrl_ops = { .s_ctrl = pcm20_s_ctrl, }; static int __init pcm20_init(void) { struct pcm20 *dev = &pcm20_card; struct v4l2_device *v4l2_dev = &dev->v4l2_dev; struct v4l2_ctrl_handler *hdl; int res; dev->aci = snd_aci_get_aci(); if (dev->aci == NULL) { v4l2_err(v4l2_dev, "you must load the snd-miro driver first!\n"); return -ENODEV; } strscpy(v4l2_dev->name, "radio-miropcm20", sizeof(v4l2_dev->name)); mutex_init(&dev->lock); res = v4l2_device_register(NULL, v4l2_dev); if (res < 0) { v4l2_err(v4l2_dev, "could not register v4l2_device\n"); return -EINVAL; } hdl = &dev->ctrl_handler; v4l2_ctrl_handler_init(hdl, 7); v4l2_ctrl_new_std(hdl, &pcm20_ctrl_ops, V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); dev->rds_pty = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_RDS_RX_PTY, 0, 0x1f, 1, 0); dev->rds_ps_name = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_RDS_RX_PS_NAME, 0, 8, 8, 0); dev->rds_radio_test = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_RDS_RX_RADIO_TEXT, 0, 64, 64, 0); dev->rds_ta = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT, 0, 1, 1, 0); dev->rds_tp = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_RDS_RX_TRAFFIC_PROGRAM, 0, 1, 1, 0); dev->rds_ms = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_RDS_RX_MUSIC_SPEECH, 0, 1, 1, 1); v4l2_dev->ctrl_handler = hdl; if (hdl->error) { res = hdl->error; v4l2_err(v4l2_dev, "Could not register control\n"); goto err_hdl; } strscpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name)); dev->vdev.v4l2_dev = v4l2_dev; dev->vdev.fops = &pcm20_fops; dev->vdev.ioctl_ops = &pcm20_ioctl_ops; dev->vdev.release = video_device_release_empty; dev->vdev.lock = &dev->lock; dev->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE; video_set_drvdata(&dev->vdev, dev); snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, dev->audmode == V4L2_TUNER_MODE_MONO, -1); pcm20_setfreq(dev, dev->freq); if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) goto err_hdl; v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n"); return 0; err_hdl: v4l2_ctrl_handler_free(hdl); v4l2_device_unregister(v4l2_dev); return -EINVAL; } MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt"); MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card."); MODULE_LICENSE("GPL"); static void __exit pcm20_cleanup(void) { struct pcm20 *dev = &pcm20_card; video_unregister_device(&dev->vdev); snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, 1, -1); v4l2_ctrl_handler_free(&dev->ctrl_handler); v4l2_device_unregister(&dev->v4l2_dev); } module_init(pcm20_init); module_exit(pcm20_cleanup);
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