/* 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.Cox@linux.org> * 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 <asm/io.h> /* outb, outb_p */ #include <asm/uaccess.h> /* copy to/from user */ #include <linux/videodev2.h> /* kernel radio structs */ #include <media/v4l2-common.h> #include <linux/spinlock.h> #include <linux/version.h> /* for KERNEL_VERSION MACRO */ #define RADIO_VERSION KERNEL_VERSION(0,0,2) static struct v4l2_queryctrl radio_qctrl[] = { { .id = V4L2_CID_AUDIO_MUTE, .name = "Mute", .minimum = 0, .maximum = 1, .default_value = 1, .type = V4L2_CTRL_TYPE_BOOLEAN, },{ .id = V4L2_CID_AUDIO_VOLUME, .name = "Volume", .minimum = 0, .maximum = 65535, .step = 65535, .default_value = 0xff, .type = V4L2_CTRL_TYPE_INTEGER, } }; #ifndef CONFIG_RADIO_RTRACK2_PORT #define CONFIG_RADIO_RTRACK2_PORT -1 #endif static int io = CONFIG_RADIO_RTRACK2_PORT; static int radio_nr = -1; static spinlock_t lock; struct rt_device { int port; unsigned long curfreq; int muted; }; /* local things */ static void rt_mute(struct rt_device *dev) { if(dev->muted) return; spin_lock(&lock); outb(1, io); spin_unlock(&lock); dev->muted = 1; } static void rt_unmute(struct rt_device *dev) { if(dev->muted == 0) return; spin_lock(&lock); outb(0, io); spin_unlock(&lock); dev->muted = 0; } static void zero(void) { outb_p(1, io); outb_p(3, io); outb_p(1, io); } static void one(void) { outb_p(5, io); outb_p(7, io); outb_p(5, io); } static int rt_setfreq(struct rt_device *dev, unsigned long freq) { int i; freq = freq / 200 + 856; spin_lock(&lock); outb_p(0xc8, io); outb_p(0xc9, io); outb_p(0xc9, io); for (i = 0; i < 10; i++) zero (); for (i = 14; i >= 0; i--) if (freq & (1 << i)) one (); else zero (); outb_p(0xc8, io); if (!dev->muted) outb_p(0, io); spin_unlock(&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)); sprintf(v->bus_info, "ISA"); v->version = RADIO_VERSION; v->capabilities = V4L2_CAP_TUNER; return 0; } static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { if (v->index > 0) return -EINVAL; return 0; } static int rt_getsigstr(struct rt_device *dev) { if (inb(io) & 2) /* bit set = no signal present */ return 0; return 1; /* signal present */ } static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { struct video_device *dev = video_devdata(file); struct rt_device *rt = dev->priv; if (v->index > 0) return -EINVAL; strcpy(v->name, "FM"); 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 video_device *dev = video_devdata(file); struct rt_device *rt = dev->priv; rt->curfreq = f->frequency; rt_setfreq(rt, rt->curfreq); return 0; } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { struct video_device *dev = video_devdata(file); struct rt_device *rt = dev->priv; f->type = V4L2_TUNER_RADIO; f->frequency = rt->curfreq; return 0; } static int vidioc_queryctrl(struct file *file, void *priv, struct v4l2_queryctrl *qc) { int i; for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { if (qc->id && qc->id == radio_qctrl[i].id) { memcpy(qc, &(radio_qctrl[i]), sizeof(*qc)); return 0; } } return -EINVAL; } static int vidioc_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { struct video_device *dev = video_devdata(file); struct rt_device *rt = dev->priv; 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 video_device *dev = video_devdata(file); struct rt_device *rt = dev->priv; 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_audio(struct file *file, void *priv, struct v4l2_audio *a) { if (a->index > 1) return -EINVAL; strcpy(a->name, "Radio"); a->capability = V4L2_AUDCAP_STEREO; return 0; } 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) { if (i != 0) return -EINVAL; return 0; } static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a) { if (a->index != 0) return -EINVAL; return 0; } static struct rt_device rtrack2_unit; static const struct file_operations rtrack2_fops = { .owner = THIS_MODULE, .open = video_exclusive_open, .release = video_exclusive_release, .ioctl = video_ioctl2, .compat_ioctl = v4l_compat_ioctl32, .llseek = no_llseek, }; static struct video_device rtrack2_radio= { .owner = THIS_MODULE, .name = "RadioTrack II radio", .type = VID_TYPE_TUNER, .fops = &rtrack2_fops, .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) { if(io==-1) { printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n"); return -EINVAL; } if (!request_region(io, 4, "rtrack2")) { printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io); return -EBUSY; } rtrack2_radio.priv=&rtrack2_unit; spin_lock_init(&lock); if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1) { release_region(io, 4); return -EINVAL; } printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n"); /* mute card - prevents noisy bootups */ outb(1, io); rtrack2_unit.muted = 1; return 0; } MODULE_AUTHOR("Ben Pfaff"); MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); MODULE_LICENSE("GPL"); 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); static void __exit rtrack2_cleanup_module(void) { video_unregister_device(&rtrack2_radio); release_region(io,4); } module_init(rtrack2_init); module_exit(rtrack2_cleanup_module); /* Local variables: compile-command: "mmake" End: */