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- /* SF16FMR2 radio driver for Linux radio support
- * heavily based on fmi driver...
- * (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com
- *
- * Notes on the hardware
- *
- * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
- * No volume control - only mute/unmute - you have to use line volume
- *
- * For read stereo/mono you must wait 0.1 sec after set frequency and
- * card unmuted so I set frequency on unmute
- * Signal handling seem to work only on autoscanning (not implemented)
- *
- * 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("Ziglio Frediano, freddy77@angelfire.com");
- MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
- MODULE_LICENSE("GPL");
- static int io = 0x384;
- static int radio_nr = -1;
- module_param(io, int, 0);
- MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
- module_param(radio_nr, int, 0);
- #define RADIO_VERSION KERNEL_VERSION(0,0,2)
- #define AUD_VOL_INDEX 1
- #undef DEBUG
- //#define DEBUG 1
- #ifdef DEBUG
- # define debug_print(s) printk s
- #else
- # define debug_print(s)
- #endif
- /* this should be static vars for module size */
- struct fmr2
- {
- struct v4l2_device v4l2_dev;
- struct video_device vdev;
- struct mutex lock;
- int io;
- int curvol; /* 0-15 */
- int mute;
- int stereo; /* card is producing stereo audio */
- unsigned long curfreq; /* freq in kHz */
- int card_type;
- };
- static struct fmr2 fmr2_card;
- /* hw precision is 12.5 kHz
- * It is only useful to give freq in interval of 200 (=0.0125Mhz),
- * other bits will be truncated
- */
- #define RSF16_ENCODE(x) ((x) / 200 + 856)
- #define RSF16_MINFREQ (87 * 16000)
- #define RSF16_MAXFREQ (108 * 16000)
- static inline void wait(int n, int io)
- {
- for (; n; --n)
- inb(io);
- }
- static void outbits(int bits, unsigned int data, int nWait, int io)
- {
- int bit;
- for (; --bits >= 0;) {
- bit = (data >> bits) & 1;
- outb(bit, io);
- wait(nWait, io);
- outb(bit | 2, io);
- wait(nWait, io);
- outb(bit, io);
- wait(nWait, io);
- }
- }
- static inline void fmr2_mute(int io)
- {
- outb(0x00, io);
- wait(4, io);
- }
- static inline void fmr2_unmute(int io)
- {
- outb(0x04, io);
- wait(4, io);
- }
- static inline int fmr2_stereo_mode(int io)
- {
- int n = inb(io);
- outb(6, io);
- inb(io);
- n = ((n >> 3) & 1) ^ 1;
- debug_print((KERN_DEBUG "stereo: %d\n", n));
- return n;
- }
- static int fmr2_product_info(struct fmr2 *dev)
- {
- int n = inb(dev->io);
- n &= 0xC1;
- if (n == 0) {
- /* this should support volume set */
- dev->card_type = 12;
- return 0;
- }
- /* not volume (mine is 11) */
- dev->card_type = (n == 128) ? 11 : 0;
- return n;
- }
- static inline int fmr2_getsigstr(struct fmr2 *dev)
- {
- /* !!! works only if scanning freq */
- int res = 0xffff;
- outb(5, dev->io);
- wait(4, dev->io);
- if (!(inb(dev->io) & 1))
- res = 0;
- debug_print((KERN_DEBUG "signal: %d\n", res));
- return res;
- }
- /* set frequency and unmute card */
- static int fmr2_setfreq(struct fmr2 *dev)
- {
- unsigned long freq = dev->curfreq;
- fmr2_mute(dev->io);
- /* 0x42 for mono output
- * 0x102 forward scanning
- * 0x182 scansione avanti
- */
- outbits(9, 0x2, 3, dev->io);
- outbits(16, RSF16_ENCODE(freq), 2, dev->io);
- fmr2_unmute(dev->io);
- /* wait 0.11 sec */
- msleep(110);
- /* NOTE if mute this stop radio
- you must set freq on unmute */
- dev->stereo = fmr2_stereo_mode(dev->io);
- return 0;
- }
- /* !!! not tested, in my card this does't work !!! */
- static int fmr2_setvolume(struct fmr2 *dev)
- {
- int vol[16] = { 0x021, 0x084, 0x090, 0x104,
- 0x110, 0x204, 0x210, 0x402,
- 0x404, 0x408, 0x410, 0x801,
- 0x802, 0x804, 0x808, 0x810 };
- int i, a;
- int n = vol[dev->curvol & 0x0f];
- if (dev->card_type != 11)
- return 1;
- for (i = 12; --i >= 0; ) {
- a = ((n >> i) & 1) << 6; /* if (a==0) a = 0; else a = 0x40; */
- outb(a | 4, dev->io);
- wait(4, dev->io);
- outb(a | 0x24, dev->io);
- wait(4, dev->io);
- outb(a | 4, dev->io);
- wait(4, dev->io);
- }
- for (i = 6; --i >= 0; ) {
- a = ((0x18 >> i) & 1) << 6;
- outb(a | 4, dev->io);
- wait(4, dev->io);
- outb(a | 0x24, dev->io);
- wait(4, dev->io);
- outb(a | 4, dev->io);
- wait(4, dev->io);
- }
- wait(4, dev->io);
- outb(0x14, dev->io);
- return 0;
- }
- static int vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *v)
- {
- strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver));
- strlcpy(v->card, "SF16-FMR2 radio", 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_g_tuner(struct file *file, void *priv,
- struct v4l2_tuner *v)
- {
- struct fmr2 *fmr2 = video_drvdata(file);
- if (v->index > 0)
- return -EINVAL;
- strlcpy(v->name, "FM", sizeof(v->name));
- v->type = V4L2_TUNER_RADIO;
- v->rangelow = RSF16_MINFREQ;
- v->rangehigh = RSF16_MAXFREQ;
- v->rxsubchans = fmr2->stereo ? V4L2_TUNER_SUB_STEREO :
- V4L2_TUNER_SUB_MONO;
- v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
- v->audmode = V4L2_TUNER_MODE_STEREO;
- mutex_lock(&fmr2->lock);
- v->signal = fmr2_getsigstr(fmr2);
- mutex_unlock(&fmr2->lock);
- return 0;
- }
- static int vidioc_s_tuner(struct file *file, void *priv,
- struct v4l2_tuner *v)
- {
- return v->index ? -EINVAL : 0;
- }
- static int vidioc_s_frequency(struct file *file, void *priv,
- struct v4l2_frequency *f)
- {
- struct fmr2 *fmr2 = video_drvdata(file);
- if (f->frequency < RSF16_MINFREQ ||
- f->frequency > RSF16_MAXFREQ)
- return -EINVAL;
- /* rounding in steps of 200 to match the freq
- that will be used */
- fmr2->curfreq = (f->frequency / 200) * 200;
- /* set card freq (if not muted) */
- if (fmr2->curvol && !fmr2->mute) {
- mutex_lock(&fmr2->lock);
- fmr2_setfreq(fmr2);
- mutex_unlock(&fmr2->lock);
- }
- return 0;
- }
- static int vidioc_g_frequency(struct file *file, void *priv,
- struct v4l2_frequency *f)
- {
- struct fmr2 *fmr2 = video_drvdata(file);
- f->type = V4L2_TUNER_RADIO;
- f->frequency = fmr2->curfreq;
- return 0;
- }
- static int vidioc_queryctrl(struct file *file, void *priv,
- struct v4l2_queryctrl *qc)
- {
- struct fmr2 *fmr2 = video_drvdata(file);
- switch (qc->id) {
- case V4L2_CID_AUDIO_MUTE:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
- case V4L2_CID_AUDIO_VOLUME:
- /* Only card_type == 11 implements volume */
- if (fmr2->card_type == 11)
- return v4l2_ctrl_query_fill(qc, 0, 15, 1, 0);
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
- }
- return -EINVAL;
- }
- static int vidioc_g_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
- {
- struct fmr2 *fmr2 = video_drvdata(file);
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_MUTE:
- ctrl->value = fmr2->mute;
- return 0;
- case V4L2_CID_AUDIO_VOLUME:
- ctrl->value = fmr2->curvol;
- return 0;
- }
- return -EINVAL;
- }
- static int vidioc_s_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
- {
- struct fmr2 *fmr2 = video_drvdata(file);
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_MUTE:
- fmr2->mute = ctrl->value;
- break;
- case V4L2_CID_AUDIO_VOLUME:
- fmr2->curvol = ctrl->value;
- break;
- default:
- return -EINVAL;
- }
- #ifdef DEBUG
- if (fmr2->curvol && !fmr2->mute)
- printk(KERN_DEBUG "unmute\n");
- else
- printk(KERN_DEBUG "mute\n");
- #endif
- mutex_lock(&fmr2->lock);
- if (fmr2->curvol && !fmr2->mute) {
- fmr2_setvolume(fmr2);
- /* Set frequency and unmute card */
- fmr2_setfreq(fmr2);
- } else
- fmr2_mute(fmr2->io);
- mutex_unlock(&fmr2->lock);
- 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)
- {
- 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 fmr2_fops = {
- .owner = THIS_MODULE,
- .ioctl = video_ioctl2,
- };
- static const struct v4l2_ioctl_ops fmr2_ioctl_ops = {
- .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 fmr2_init(void)
- {
- struct fmr2 *fmr2 = &fmr2_card;
- struct v4l2_device *v4l2_dev = &fmr2->v4l2_dev;
- int res;
- strlcpy(v4l2_dev->name, "sf16fmr2", sizeof(v4l2_dev->name));
- fmr2->io = io;
- fmr2->stereo = 1;
- mutex_init(&fmr2->lock);
- if (!request_region(fmr2->io, 2, "sf16fmr2")) {
- v4l2_err(v4l2_dev, "request_region failed!\n");
- return -EBUSY;
- }
- res = v4l2_device_register(NULL, v4l2_dev);
- if (res < 0) {
- release_region(fmr2->io, 2);
- v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
- return res;
- }
- strlcpy(fmr2->vdev.name, v4l2_dev->name, sizeof(fmr2->vdev.name));
- fmr2->vdev.v4l2_dev = v4l2_dev;
- fmr2->vdev.fops = &fmr2_fops;
- fmr2->vdev.ioctl_ops = &fmr2_ioctl_ops;
- fmr2->vdev.release = video_device_release_empty;
- video_set_drvdata(&fmr2->vdev, fmr2);
- if (video_register_device(&fmr2->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
- v4l2_device_unregister(v4l2_dev);
- release_region(fmr2->io, 2);
- return -EINVAL;
- }
- v4l2_info(v4l2_dev, "SF16FMR2 radio card driver at 0x%x.\n", fmr2->io);
- /* mute card - prevents noisy bootups */
- mutex_lock(&fmr2->lock);
- fmr2_mute(fmr2->io);
- fmr2_product_info(fmr2);
- mutex_unlock(&fmr2->lock);
- debug_print((KERN_DEBUG "card_type %d\n", fmr2->card_type));
- return 0;
- }
- static void __exit fmr2_exit(void)
- {
- struct fmr2 *fmr2 = &fmr2_card;
- video_unregister_device(&fmr2->vdev);
- v4l2_device_unregister(&fmr2->v4l2_dev);
- release_region(fmr2->io, 2);
- }
- module_init(fmr2_init);
- module_exit(fmr2_exit);
- #ifndef MODULE
- static int __init fmr2_setup_io(char *str)
- {
- get_option(&str, &io);
- return 1;
- }
- __setup("sf16fmr2=", fmr2_setup_io);
- #endif
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