/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff * * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk> * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> * * TODO: Allow for more than one of these foolish entities :-) * * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> */ #include <linux/module.h> /* Modules */ #include <linux/init.h> /* Initdata */ #include <linux/ioport.h> /* request_region */ #include <linux/delay.h> /* udelay */ #include <linux/videodev2.h> /* kernel radio structs */ #include <linux/mutex.h> #include <linux/version.h> /* for KERNEL_VERSION MACRO */ #include <linux/io.h> /* outb, outb_p */ #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> MODULE_AUTHOR("Ben Pfaff"); MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); MODULE_LICENSE("GPL"); #ifndef CONFIG_RADIO_RTRACK2_PORT #define CONFIG_RADIO_RTRACK2_PORT -1 #endif static int io = CONFIG_RADIO_RTRACK2_PORT; static int radio_nr = -1; module_param(io, int, 0); MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)"); module_param(radio_nr, int, 0); #define RADIO_VERSION KERNEL_VERSION(0, 0, 2) struct rtrack2 { struct v4l2_device v4l2_dev; struct video_device vdev; int io; unsigned long curfreq; int muted; struct mutex lock; }; static struct rtrack2 rtrack2_card; /* local things */ static void rt_mute(struct rtrack2 *dev) { if (dev->muted) return; mutex_lock(&dev->lock); outb(1, dev->io); mutex_unlock(&dev->lock); dev->muted = 1; } static void rt_unmute(struct rtrack2 *dev) { if(dev->muted == 0) return; mutex_lock(&dev->lock); outb(0, dev->io); mutex_unlock(&dev->lock); dev->muted = 0; } static void zero(struct rtrack2 *dev) { outb_p(1, dev->io); outb_p(3, dev->io); outb_p(1, dev->io); } static void one(struct rtrack2 *dev) { outb_p(5, dev->io); outb_p(7, dev->io); outb_p(5, dev->io); } static int rt_setfreq(struct rtrack2 *dev, unsigned long freq) { int i; mutex_lock(&dev->lock); dev->curfreq = freq; freq = freq / 200 + 856; outb_p(0xc8, dev->io); outb_p(0xc9, dev->io); outb_p(0xc9, dev->io); for (i = 0; i < 10; i++) zero(dev); for (i = 14; i >= 0; i--) if (freq & (1 << i)) one(dev); else zero(dev); outb_p(0xc8, dev->io); if (!dev->muted) outb_p(0, dev->io); mutex_unlock(&dev->lock); return 0; } static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *v) { strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver)); strlcpy(v->card, "RadioTrack II", sizeof(v->card)); strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); v->version = RADIO_VERSION; v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; return 0; } static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { return v->index ? -EINVAL : 0; } static int rt_getsigstr(struct rtrack2 *dev) { int sig = 1; mutex_lock(&dev->lock); if (inb(dev->io) & 2) /* bit set = no signal present */ sig = 0; mutex_unlock(&dev->lock); return sig; } static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { struct rtrack2 *rt = video_drvdata(file); if (v->index > 0) return -EINVAL; strlcpy(v->name, "FM", sizeof(v->name)); v->type = V4L2_TUNER_RADIO; v->rangelow = 88 * 16000; v->rangehigh = 108 * 16000; v->rxsubchans = V4L2_TUNER_SUB_MONO; v->capability = V4L2_TUNER_CAP_LOW; v->audmode = V4L2_TUNER_MODE_MONO; v->signal = 0xFFFF * rt_getsigstr(rt); return 0; } static int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { struct rtrack2 *rt = video_drvdata(file); rt_setfreq(rt, f->frequency); return 0; } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { struct rtrack2 *rt = video_drvdata(file); f->type = V4L2_TUNER_RADIO; f->frequency = rt->curfreq; return 0; } static int vidioc_queryctrl(struct file *file, void *priv, struct v4l2_queryctrl *qc) { switch (qc->id) { case V4L2_CID_AUDIO_MUTE: return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); case V4L2_CID_AUDIO_VOLUME: return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535); } return -EINVAL; } static int vidioc_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { struct rtrack2 *rt = video_drvdata(file); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: ctrl->value = rt->muted; return 0; case V4L2_CID_AUDIO_VOLUME: if (rt->muted) ctrl->value = 0; else ctrl->value = 65535; return 0; } return -EINVAL; } static int vidioc_s_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { struct rtrack2 *rt = video_drvdata(file); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: if (ctrl->value) rt_mute(rt); else rt_unmute(rt); return 0; case V4L2_CID_AUDIO_VOLUME: if (ctrl->value) rt_unmute(rt); else rt_mute(rt); return 0; } return -EINVAL; } static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) { *i = 0; return 0; } static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) { return i ? -EINVAL : 0; } static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) { a->index = 0; strlcpy(a->name, "Radio", sizeof(a->name)); a->capability = V4L2_AUDCAP_STEREO; return 0; } static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) { return a->index ? -EINVAL : 0; } static const struct v4l2_file_operations rtrack2_fops = { .owner = THIS_MODULE, .ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops rtrack2_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_queryctrl = vidioc_queryctrl, .vidioc_g_ctrl = vidioc_g_ctrl, .vidioc_s_ctrl = vidioc_s_ctrl, .vidioc_g_audio = vidioc_g_audio, .vidioc_s_audio = vidioc_s_audio, .vidioc_g_input = vidioc_g_input, .vidioc_s_input = vidioc_s_input, }; static int __init rtrack2_init(void) { struct rtrack2 *dev = &rtrack2_card; struct v4l2_device *v4l2_dev = &dev->v4l2_dev; int res; strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name)); dev->io = io; if (dev->io == -1) { v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n"); return -EINVAL; } if (!request_region(dev->io, 4, "rtrack2")) { v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io); return -EBUSY; } res = v4l2_device_register(NULL, v4l2_dev); if (res < 0) { release_region(dev->io, 4); v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); return res; } strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name)); dev->vdev.v4l2_dev = v4l2_dev; dev->vdev.fops = &rtrack2_fops; dev->vdev.ioctl_ops = &rtrack2_ioctl_ops; dev->vdev.release = video_device_release_empty; video_set_drvdata(&dev->vdev, dev); mutex_init(&dev->lock); if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { v4l2_device_unregister(v4l2_dev); release_region(dev->io, 4); return -EINVAL; } v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n"); /* mute card - prevents noisy bootups */ outb(1, dev->io); dev->muted = 1; return 0; } static void __exit rtrack2_exit(void) { struct rtrack2 *dev = &rtrack2_card; video_unregister_device(&dev->vdev); v4l2_device_unregister(&dev->v4l2_dev); release_region(dev->io, 4); } module_init(rtrack2_init); module_exit(rtrack2_exit);