diff options
author | Ralf Baechle <ralf@linux-mips.org> | 1998-08-25 09:12:35 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 1998-08-25 09:12:35 +0000 |
commit | c7fc24dc4420057f103afe8fc64524ebc25c5d37 (patch) | |
tree | 3682407a599b8f9f03fc096298134cafba1c9b2f /drivers/char/radio-rtrack2.c | |
parent | 1d793fade8b063fde3cf275bf1a5c2d381292cd9 (diff) |
o Merge with Linux 2.1.116.
o New Newport console code.
o New G364 console code.
Diffstat (limited to 'drivers/char/radio-rtrack2.c')
-rw-r--r-- | drivers/char/radio-rtrack2.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/drivers/char/radio-rtrack2.c b/drivers/char/radio-rtrack2.c new file mode 100644 index 000000000..7daeb4e01 --- /dev/null +++ b/drivers/char/radio-rtrack2.c @@ -0,0 +1,272 @@ +/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff + * + * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood + * Coverted 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 :-) + * + */ + +#include <linux/module.h> /* Modules */ +#include <linux/init.h> /* Initdata */ +#include <linux/ioport.h> /* check_region, request_region */ +#include <linux/delay.h> /* udelay */ +#include <asm/io.h> /* outb, outb_p */ +#include <asm/uaccess.h> /* copy to/from user */ +#include <linux/videodev.h> /* kernel radio structs */ +#include <linux/config.h> /* CONFIG_RADIO_RTRACK2_PORT */ + +#ifndef CONFIG_RADIO_RTRACK2_PORT +#define CONFIG_RADIO_RTRACK2_PORT -1 +#endif + +static int io = CONFIG_RADIO_RTRACK2_PORT; +static int users = 0; + +struct rt_device +{ + int port; + unsigned long curfreq; + int muted; +}; + + +/* local things */ + +static void rt_mute(struct rt_device *dev) +{ + if(dev->muted) + return; + outb(1, io); + dev->muted = 1; +} + +static void rt_unmute(struct rt_device *dev) +{ + if(dev->muted == 0) + return; + outb(0, io); + 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; + + 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); + return 0; +} + +int rt_getsigstr(struct rt_device *dev) +{ + if (inb(io) & 2) /* bit set = no signal present */ + return 0; + return 1; /* signal present */ +} + +static int rt_ioctl(struct video_device *dev, unsigned int cmd, void *arg) +{ + struct rt_device *rt=dev->priv; + + switch(cmd) + { + case VIDIOCGCAP: + { + struct video_capability v; + v.type=VID_TYPE_TUNER; + v.channels=1; + v.audios=1; + /* No we don't do pictures */ + v.maxwidth=0; + v.maxheight=0; + v.minwidth=0; + v.minheight=0; + if(copy_to_user(arg,&v,sizeof(v))) + return -EFAULT; + return 0; + } + case VIDIOCGTUNER: + { + struct video_tuner v; + if(copy_from_user(&v, arg,sizeof(v))!=0) + return -EFAULT; + if(v.tuner) /* Only 1 tuner */ + return -EINVAL; + v.rangelow=88*16000; + v.rangehigh=108*16000; + v.flags=VIDEO_TUNER_LOW; + v.mode=VIDEO_MODE_AUTO; + v.signal=0xFFFF*rt_getsigstr(rt); + if(copy_to_user(arg,&v, sizeof(v))) + return -EFAULT; + return 0; + } + case VIDIOCSTUNER: + { + struct video_tuner v; + if(copy_from_user(&v, arg, sizeof(v))) + return -EFAULT; + if(v.tuner!=0) + return -EINVAL; + /* Only 1 tuner so no setting needed ! */ + return 0; + } + case VIDIOCGFREQ: + if(copy_to_user(arg, &rt->curfreq, sizeof(rt->curfreq))) + return -EFAULT; + return 0; + case VIDIOCSFREQ: + if(copy_from_user(&rt->curfreq, arg,sizeof(rt->curfreq))) + return -EFAULT; + rt_setfreq(rt, rt->curfreq); + return 0; + case VIDIOCGAUDIO: + { + struct video_audio v; + memset(&v,0, sizeof(v)); + v.flags|=VIDEO_AUDIO_MUTABLE; + v.volume=1; + strcpy(v.name, "Radio"); + if(copy_to_user(arg,&v, sizeof(v))) + return -EFAULT; + return 0; + } + case VIDIOCSAUDIO: + { + struct video_audio v; + if(copy_from_user(&v, arg, sizeof(v))) + return -EFAULT; + if(v.audio) + return -EINVAL; + + if(v.flags&VIDEO_AUDIO_MUTE) + rt_mute(rt); + else + rt_unmute(rt); + + return 0; + } + default: + return -ENOIOCTLCMD; + } +} + +static int rt_open(struct video_device *dev, int flags) +{ + if(users) + return -EBUSY; + users++; + MOD_INC_USE_COUNT; + return 0; +} + +static void rt_close(struct video_device *dev) +{ + users--; + MOD_DEC_USE_COUNT; +} + +static struct rt_device rtrack2_unit; + +static struct video_device rtrack2_radio= +{ + "RadioTrack II radio", + VID_TYPE_TUNER, + VID_HARDWARE_RTRACK2, + rt_open, + rt_close, + NULL, /* Can't read (no capture ability) */ + NULL, /* Can't write */ + NULL, /* Can't poll */ + rt_ioctl, + NULL, + NULL +}; + +__initfunc(int rtrack2_init(struct video_init *v)) +{ + if (check_region(io, 4)) + { + printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io); + return -EBUSY; + } + + rtrack2_radio.priv=&rtrack2_unit; + + if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO)==-1) + return -EINVAL; + + request_region(io, 4, "rtrack2"); + printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n"); + + /* mute card - prevents noisy bootups */ + outb(1, io); + rtrack2_unit.muted = 1; + + return 0; +} + +#ifdef MODULE + +MODULE_AUTHOR("Ben Pfaff"); +MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); +MODULE_PARM(io, "i"); +MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)"); + +EXPORT_NO_SYMBOLS; + +int init_module(void) +{ + if(io==-1) + { + printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n"); + return -EINVAL; + } + return rtrack2_init(NULL); +} + +void cleanup_module(void) +{ + video_unregister_device(&rtrack2_radio); + release_region(io,4); +} + +#endif + +/* + 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: +*/ |