From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/media/radio/radio-gemtek.c | 304 +++++++++++++++++++++++++++++++++++++ 1 file changed, 304 insertions(+) create mode 100644 drivers/media/radio/radio-gemtek.c (limited to 'drivers/media/radio/radio-gemtek.c') diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c new file mode 100644 index 000000000000..202bfe6819b8 --- /dev/null +++ b/drivers/media/radio/radio-gemtek.c @@ -0,0 +1,304 @@ +/* GemTek radio card driver for Linux (C) 1998 Jonas Munsin + * + * GemTek hasn't released any specs on the card, so the protocol had to + * be reverse engineered with dosemu. + * + * Besides the protocol changes, this is mostly a copy of: + * + * 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 + * Various bugfixes and enhancements by Russell Kroll + * + * TODO: Allow for more than one of these foolish entities :-) + * + */ + +#include /* Modules */ +#include /* Initdata */ +#include /* check_region, request_region */ +#include /* udelay */ +#include /* outb, outb_p */ +#include /* copy to/from user */ +#include /* kernel radio structs */ +#include /* CONFIG_RADIO_GEMTEK_PORT */ +#include + +#ifndef CONFIG_RADIO_GEMTEK_PORT +#define CONFIG_RADIO_GEMTEK_PORT -1 +#endif + +static int io = CONFIG_RADIO_GEMTEK_PORT; +static int radio_nr = -1; +static spinlock_t lock; + +struct gemtek_device +{ + int port; + unsigned long curfreq; + int muted; +}; + + +/* local things */ + +/* the correct way to mute the gemtek may be to write the last written + * frequency || 0x10, but just writing 0x10 once seems to do it as well + */ +static void gemtek_mute(struct gemtek_device *dev) +{ + if(dev->muted) + return; + spin_lock(&lock); + outb(0x10, io); + spin_unlock(&lock); + dev->muted = 1; +} + +static void gemtek_unmute(struct gemtek_device *dev) +{ + if(dev->muted == 0) + return; + spin_lock(&lock); + outb(0x20, io); + spin_unlock(&lock); + dev->muted = 0; +} + +static void zero(void) +{ + outb_p(0x04, io); + udelay(5); + outb_p(0x05, io); + udelay(5); +} + +static void one(void) +{ + outb_p(0x06, io); + udelay(5); + outb_p(0x07, io); + udelay(5); +} + +static int gemtek_setfreq(struct gemtek_device *dev, unsigned long freq) +{ + int i; + +/* freq = 78.25*((float)freq/16000.0 + 10.52); */ + + freq /= 16; + freq += 10520; + freq *= 7825; + freq /= 100000; + + spin_lock(&lock); + + /* 2 start bits */ + outb_p(0x03, io); + udelay(5); + outb_p(0x07, io); + udelay(5); + + /* 28 frequency bits (lsb first) */ + for (i = 0; i < 14; i++) + if (freq & (1 << i)) + one(); + else + zero(); + /* 36 unknown bits */ + for (i = 0; i < 11; i++) + zero(); + one(); + for (i = 0; i < 4; i++) + zero(); + one(); + zero(); + + /* 2 end bits */ + outb_p(0x03, io); + udelay(5); + outb_p(0x07, io); + udelay(5); + + spin_unlock(&lock); + + return 0; +} + +static int gemtek_getsigstr(struct gemtek_device *dev) +{ + spin_lock(&lock); + inb(io); + udelay(5); + spin_unlock(&lock); + if (inb(io) & 8) /* bit set = no signal present */ + return 0; + return 1; /* signal present */ +} + +static int gemtek_do_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, void *arg) +{ + struct video_device *dev = video_devdata(file); + struct gemtek_device *rt=dev->priv; + + switch(cmd) + { + case VIDIOCGCAP: + { + struct video_capability *v = arg; + memset(v,0,sizeof(*v)); + v->type=VID_TYPE_TUNER; + v->channels=1; + v->audios=1; + strcpy(v->name, "GemTek"); + return 0; + } + case VIDIOCGTUNER: + { + struct video_tuner *v = arg; + if(v->tuner) /* Only 1 tuner */ + return -EINVAL; + v->rangelow=87*16000; + v->rangehigh=108*16000; + v->flags=VIDEO_TUNER_LOW; + v->mode=VIDEO_MODE_AUTO; + v->signal=0xFFFF*gemtek_getsigstr(rt); + strcpy(v->name, "FM"); + return 0; + } + case VIDIOCSTUNER: + { + struct video_tuner *v = arg; + if(v->tuner!=0) + return -EINVAL; + /* Only 1 tuner so no setting needed ! */ + return 0; + } + case VIDIOCGFREQ: + { + unsigned long *freq = arg; + *freq = rt->curfreq; + return 0; + } + case VIDIOCSFREQ: + { + unsigned long *freq = arg; + rt->curfreq = *freq; + /* needs to be called twice in order for getsigstr to work */ + gemtek_setfreq(rt, rt->curfreq); + gemtek_setfreq(rt, rt->curfreq); + return 0; + } + case VIDIOCGAUDIO: + { + struct video_audio *v = arg; + memset(v,0, sizeof(*v)); + v->flags|=VIDEO_AUDIO_MUTABLE; + v->volume=1; + v->step=65535; + strcpy(v->name, "Radio"); + return 0; + } + case VIDIOCSAUDIO: + { + struct video_audio *v = arg; + if(v->audio) + return -EINVAL; + + if(v->flags&VIDEO_AUDIO_MUTE) + gemtek_mute(rt); + else + gemtek_unmute(rt); + + return 0; + } + default: + return -ENOIOCTLCMD; + } +} + +static int gemtek_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + return video_usercopy(inode, file, cmd, arg, gemtek_do_ioctl); +} + +static struct gemtek_device gemtek_unit; + +static struct file_operations gemtek_fops = { + .owner = THIS_MODULE, + .open = video_exclusive_open, + .release = video_exclusive_release, + .ioctl = gemtek_ioctl, + .llseek = no_llseek, +}; + +static struct video_device gemtek_radio= +{ + .owner = THIS_MODULE, + .name = "GemTek radio", + .type = VID_TYPE_TUNER, + .hardware = VID_HARDWARE_GEMTEK, + .fops = &gemtek_fops, +}; + +static int __init gemtek_init(void) +{ + if(io==-1) + { + printk(KERN_ERR "You must set an I/O address with io=0x20c, io=0x30c, io=0x24c or io=0x34c (io=0x020c or io=0x248 for the combined sound/radiocard)\n"); + return -EINVAL; + } + + if (!request_region(io, 4, "gemtek")) + { + printk(KERN_ERR "gemtek: port 0x%x already in use\n", io); + return -EBUSY; + } + + gemtek_radio.priv=&gemtek_unit; + + if(video_register_device(&gemtek_radio, VFL_TYPE_RADIO, radio_nr)==-1) + { + release_region(io, 4); + return -EINVAL; + } + printk(KERN_INFO "GemTek Radio Card driver.\n"); + + spin_lock_init(&lock); + + /* this is _maybe_ unnecessary */ + outb(0x01, io); + + /* mute card - prevents noisy bootups */ + gemtek_unit.muted = 0; + gemtek_mute(&gemtek_unit); + + return 0; +} + +MODULE_AUTHOR("Jonas Munsin"); +MODULE_DESCRIPTION("A driver for the GemTek Radio Card"); +MODULE_LICENSE("GPL"); + +module_param(io, int, 0); +MODULE_PARM_DESC(io, "I/O address of the GemTek card (0x20c, 0x30c, 0x24c or 0x34c (0x20c or 0x248 have been reported to work for the combined sound/radiocard))."); +module_param(radio_nr, int, 0); + +static void __exit gemtek_cleanup(void) +{ + video_unregister_device(&gemtek_radio); + release_region(io,4); +} + +module_init(gemtek_init); +module_exit(gemtek_cleanup); + +/* + Local variables: + compile-command: "gcc -c -DMODVERSIONS -D__KERNEL__ -DMODULE -O6 -Wall -Wstrict-prototypes -I /home/blp/tmp/linux-2.1.111-rtrack/include radio-rtrack2.c" + End: +*/ -- cgit v1.2.3