| /* radiotrack (radioreveal) driver for Linux radio support |
| * (c) 1997 M. Kirkwood |
| * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> |
| * Converted to new API by Alan Cox <Alan.Cox@linux.org> |
| * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> |
| * |
| * History: |
| * 1999-02-24 Russell Kroll <rkroll@exploits.org> |
| * Fine tuning/VIDEO_TUNER_LOW |
| * Frequency range expanded to start at 87 MHz |
| * |
| * TODO: Allow for more than one of these foolish entities :-) |
| * |
| * Notes on the hardware (reverse engineered from other peoples' |
| * reverse engineering of AIMS' code :-) |
| * |
| * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); |
| * |
| * The signal strength query is unsurprisingly inaccurate. And it seems |
| * to indicate that (on my card, at least) the frequency setting isn't |
| * too great. (I have to tune up .025MHz from what the freq should be |
| * to get a report that the thing is tuned.) |
| * |
| * Volume control is (ugh) analogue: |
| * out(port, start_increasing_volume); |
| * wait(a_wee_while); |
| * out(port, stop_changing_the_volume); |
| * |
| */ |
| |
| #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 <asm/semaphore.h> /* Lock for the I/O */ |
| |
| #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
| #define RADIO_VERSION KERNEL_VERSION(0,0,2) |
| |
| #ifndef CONFIG_RADIO_RTRACK_PORT |
| #define CONFIG_RADIO_RTRACK_PORT -1 |
| #endif |
| |
| static int io = CONFIG_RADIO_RTRACK_PORT; |
| static int radio_nr = -1; |
| static struct mutex lock; |
| |
| struct rt_device |
| { |
| int port; |
| int curvol; |
| unsigned long curfreq; |
| int muted; |
| }; |
| |
| |
| /* local things */ |
| |
| static void sleep_delay(long n) |
| { |
| /* Sleep nicely for 'n' uS */ |
| int d=n/msecs_to_jiffies(1000); |
| if(!d) |
| udelay(n); |
| else |
| msleep(jiffies_to_msecs(d)); |
| } |
| |
| static void rt_decvol(void) |
| { |
| outb(0x58, io); /* volume down + sigstr + on */ |
| sleep_delay(100000); |
| outb(0xd8, io); /* volume steady + sigstr + on */ |
| } |
| |
| static void rt_incvol(void) |
| { |
| outb(0x98, io); /* volume up + sigstr + on */ |
| sleep_delay(100000); |
| outb(0xd8, io); /* volume steady + sigstr + on */ |
| } |
| |
| static void rt_mute(struct rt_device *dev) |
| { |
| dev->muted = 1; |
| mutex_lock(&lock); |
| outb(0xd0, io); /* volume steady, off */ |
| mutex_unlock(&lock); |
| } |
| |
| static int rt_setvol(struct rt_device *dev, int vol) |
| { |
| int i; |
| |
| mutex_lock(&lock); |
| |
| if(vol == dev->curvol) { /* requested volume = current */ |
| if (dev->muted) { /* user is unmuting the card */ |
| dev->muted = 0; |
| outb (0xd8, io); /* enable card */ |
| } |
| mutex_unlock(&lock); |
| return 0; |
| } |
| |
| if(vol == 0) { /* volume = 0 means mute the card */ |
| outb(0x48, io); /* volume down but still "on" */ |
| sleep_delay(2000000); /* make sure it's totally down */ |
| outb(0xd0, io); /* volume steady, off */ |
| dev->curvol = 0; /* track the volume state! */ |
| mutex_unlock(&lock); |
| return 0; |
| } |
| |
| dev->muted = 0; |
| if(vol > dev->curvol) |
| for(i = dev->curvol; i < vol; i++) |
| rt_incvol(); |
| else |
| for(i = dev->curvol; i > vol; i--) |
| rt_decvol(); |
| |
| dev->curvol = vol; |
| mutex_unlock(&lock); |
| return 0; |
| } |
| |
| /* the 128+64 on these outb's is to keep the volume stable while tuning |
| * without them, the volume _will_ creep up with each frequency change |
| * and bit 4 (+16) is to keep the signal strength meter enabled |
| */ |
| |
| static void send_0_byte(int port, struct rt_device *dev) |
| { |
| if ((dev->curvol == 0) || (dev->muted)) { |
| outb_p(128+64+16+ 1, port); /* wr-enable + data low */ |
| outb_p(128+64+16+2+1, port); /* clock */ |
| } |
| else { |
| outb_p(128+64+16+8+ 1, port); /* on + wr-enable + data low */ |
| outb_p(128+64+16+8+2+1, port); /* clock */ |
| } |
| sleep_delay(1000); |
| } |
| |
| static void send_1_byte(int port, struct rt_device *dev) |
| { |
| if ((dev->curvol == 0) || (dev->muted)) { |
| outb_p(128+64+16+4 +1, port); /* wr-enable+data high */ |
| outb_p(128+64+16+4+2+1, port); /* clock */ |
| } |
| else { |
| outb_p(128+64+16+8+4 +1, port); /* on+wr-enable+data high */ |
| outb_p(128+64+16+8+4+2+1, port); /* clock */ |
| } |
| |
| sleep_delay(1000); |
| } |
| |
| static int rt_setfreq(struct rt_device *dev, unsigned long freq) |
| { |
| int i; |
| |
| /* adapted from radio-aztech.c */ |
| |
| /* now uses VIDEO_TUNER_LOW for fine tuning */ |
| |
| freq += 171200; /* Add 10.7 MHz IF */ |
| freq /= 800; /* Convert to 50 kHz units */ |
| |
| mutex_lock(&lock); /* Stop other ops interfering */ |
| |
| send_0_byte (io, dev); /* 0: LSB of frequency */ |
| |
| for (i = 0; i < 13; i++) /* : frequency bits (1-13) */ |
| if (freq & (1 << i)) |
| send_1_byte (io, dev); |
| else |
| send_0_byte (io, dev); |
| |
| send_0_byte (io, dev); /* 14: test bit - always 0 */ |
| send_0_byte (io, dev); /* 15: test bit - always 0 */ |
| |
| send_0_byte (io, dev); /* 16: band data 0 - always 0 */ |
| send_0_byte (io, dev); /* 17: band data 1 - always 0 */ |
| send_0_byte (io, dev); /* 18: band data 2 - always 0 */ |
| send_0_byte (io, dev); /* 19: time base - always 0 */ |
| |
| send_0_byte (io, dev); /* 20: spacing (0 = 25 kHz) */ |
| send_1_byte (io, dev); /* 21: spacing (1 = 25 kHz) */ |
| send_0_byte (io, dev); /* 22: spacing (0 = 25 kHz) */ |
| send_1_byte (io, dev); /* 23: AM/FM (FM = 1, always) */ |
| |
| if ((dev->curvol == 0) || (dev->muted)) |
| outb (0xd0, io); /* volume steady + sigstr */ |
| else |
| outb (0xd8, io); /* volume steady + sigstr + on */ |
| |
| mutex_unlock(&lock); |
| |
| 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 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 = 0xff, |
| .step = 1, |
| .default_value = 0xff, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| } |
| }; |
| |
| static int vidioc_querycap(struct file *file, void *priv, |
| struct v4l2_capability *v) |
| { |
| strlcpy(v->driver, "radio-aimslab", sizeof(v->driver)); |
| strlcpy(v->card, "RadioTrack", sizeof(v->card)); |
| sprintf(v->bus_info, "ISA"); |
| v->version = RADIO_VERSION; |
| v->capabilities = V4L2_CAP_TUNER; |
| return 0; |
| } |
| |
| 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 = (87*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_tuner(struct file *file, void *priv, |
| struct v4l2_tuner *v) |
| { |
| if (v->index > 0) |
| return -EINVAL; |
| 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: |
| ctrl->value = rt->curvol * 6554; |
| 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_setvol(rt,rt->curvol); |
| return 0; |
| case V4L2_CID_AUDIO_VOLUME: |
| rt_setvol(rt,ctrl->value); |
| 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 rtrack_unit; |
| |
| static const struct file_operations rtrack_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 rtrack_radio= |
| { |
| .owner = THIS_MODULE, |
| .name = "RadioTrack radio", |
| .type = VID_TYPE_TUNER, |
| .fops = &rtrack_fops, |
| .vidioc_querycap = vidioc_querycap, |
| .vidioc_g_tuner = vidioc_g_tuner, |
| .vidioc_s_tuner = vidioc_s_tuner, |
| .vidioc_g_audio = vidioc_g_audio, |
| .vidioc_s_audio = vidioc_s_audio, |
| .vidioc_g_input = vidioc_g_input, |
| .vidioc_s_input = vidioc_s_input, |
| .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, |
| }; |
| |
| static int __init rtrack_init(void) |
| { |
| if(io==-1) |
| { |
| printk(KERN_ERR "You must set an I/O address with io=0x???\n"); |
| return -EINVAL; |
| } |
| |
| if (!request_region(io, 2, "rtrack")) |
| { |
| printk(KERN_ERR "rtrack: port 0x%x already in use\n", io); |
| return -EBUSY; |
| } |
| |
| rtrack_radio.priv=&rtrack_unit; |
| |
| if(video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr)==-1) |
| { |
| release_region(io, 2); |
| return -EINVAL; |
| } |
| printk(KERN_INFO "AIMSlab RadioTrack/RadioReveal card driver.\n"); |
| |
| /* Set up the I/O locking */ |
| |
| mutex_init(&lock); |
| |
| /* mute card - prevents noisy bootups */ |
| |
| /* this ensures that the volume is all the way down */ |
| outb(0x48, io); /* volume down but still "on" */ |
| sleep_delay(2000000); /* make sure it's totally down */ |
| outb(0xc0, io); /* steady volume, mute card */ |
| rtrack_unit.curvol = 0; |
| |
| return 0; |
| } |
| |
| MODULE_AUTHOR("M.Kirkwood"); |
| MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card."); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(io, int, 0); |
| MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)"); |
| module_param(radio_nr, int, 0); |
| |
| static void __exit cleanup_rtrack_module(void) |
| { |
| video_unregister_device(&rtrack_radio); |
| release_region(io,2); |
| } |
| |
| module_init(rtrack_init); |
| module_exit(cleanup_rtrack_module); |
| |