| /* 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 <media/v4l2-ioctl.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, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = v4l_compat_ioctl32, |
| #endif |
| .llseek = no_llseek, |
| }; |
| |
| 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 struct video_device rtrack2_radio = { |
| .owner = THIS_MODULE, |
| .name = "RadioTrack II radio", |
| .type = VID_TYPE_TUNER, |
| .fops = &rtrack2_fops, |
| .ioctl_ops = &rtrack2_ioctl_ops, |
| }; |
| |
| 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: |
| */ |