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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/media/radio/radio-sf16fmi.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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!
Diffstat (limited to 'drivers/media/radio/radio-sf16fmi.c')
-rw-r--r-- | drivers/media/radio/radio-sf16fmi.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c new file mode 100644 index 0000000..3a464a0 --- /dev/null +++ b/drivers/media/radio/radio-sf16fmi.c @@ -0,0 +1,328 @@ +/* SF16FMI radio driver for Linux radio support + * heavily based on rtrack driver... + * (c) 1997 M. Kirkwood + * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz + * + * Fitted to new interface by Alan Cox <alan.cox@linux.org> + * Made working and cleaned up functions <mikael.hedin@irf.se> + * Support for ISAPnP by Ladislav Michl <ladis@psi.cz> + * + * 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 + * control on SB-part of SF16FMI + * + */ + +#include <linux/kernel.h> /* __setup */ +#include <linux/module.h> /* Modules */ +#include <linux/init.h> /* Initdata */ +#include <linux/ioport.h> /* check_region, request_region */ +#include <linux/delay.h> /* udelay */ +#include <linux/videodev.h> /* kernel radio structs */ +#include <linux/isapnp.h> +#include <asm/io.h> /* outb, outb_p */ +#include <asm/uaccess.h> /* copy to/from user */ +#include <asm/semaphore.h> + +struct fmi_device +{ + int port; + int curvol; /* 1 or 0 */ + unsigned long curfreq; /* freq in kHz */ + __u32 flags; +}; + +static int io = -1; +static int radio_nr = -1; +static struct pnp_dev *dev = NULL; +static struct semaphore lock; + +/* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */ +/* It is only useful to give freq in intervall of 800 (=0.05Mhz), + * other bits will be truncated, e.g 92.7400016 -> 92.7, but + * 92.7400017 -> 92.75 + */ +#define RSF16_ENCODE(x) ((x)/800+214) +#define RSF16_MINFREQ 87*16000 +#define RSF16_MAXFREQ 108*16000 + +static void outbits(int bits, unsigned int data, int port) +{ + while(bits--) { + if(data & 1) { + outb(5, port); + udelay(6); + outb(7, port); + udelay(6); + } else { + outb(1, port); + udelay(6); + outb(3, port); + udelay(6); + } + data>>=1; + } +} + +static inline void fmi_mute(int port) +{ + down(&lock); + outb(0x00, port); + up(&lock); +} + +static inline void fmi_unmute(int port) +{ + down(&lock); + outb(0x08, port); + up(&lock); +} + +static inline int fmi_setfreq(struct fmi_device *dev) +{ + int myport = dev->port; + unsigned long freq = dev->curfreq; + + down(&lock); + + outbits(16, RSF16_ENCODE(freq), myport); + outbits(8, 0xC0, myport); + msleep(143); /* was schedule_timeout(HZ/7) */ + up(&lock); + if (dev->curvol) fmi_unmute(myport); + return 0; +} + +static inline int fmi_getsigstr(struct fmi_device *dev) +{ + int val; + int res; + int myport = dev->port; + + + down(&lock); + val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */ + outb(val, myport); + outb(val | 0x10, myport); + msleep(143); /* was schedule_timeout(HZ/7) */ + res = (int)inb(myport+1); + outb(val, myport); + + up(&lock); + return (res & 2) ? 0 : 0xFFFF; +} + +static int fmi_do_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, void *arg) +{ + struct video_device *dev = video_devdata(file); + struct fmi_device *fmi=dev->priv; + + switch(cmd) + { + case VIDIOCGCAP: + { + struct video_capability *v = arg; + memset(v,0,sizeof(*v)); + strcpy(v->name, "SF16-FMx radio"); + v->type=VID_TYPE_TUNER; + v->channels=1; + v->audios=1; + return 0; + } + case VIDIOCGTUNER: + { + struct video_tuner *v = arg; + int mult; + + if(v->tuner) /* Only 1 tuner */ + return -EINVAL; + strcpy(v->name, "FM"); + mult = (fmi->flags & VIDEO_TUNER_LOW) ? 1 : 1000; + v->rangelow = RSF16_MINFREQ/mult; + v->rangehigh = RSF16_MAXFREQ/mult; + v->flags=fmi->flags; + v->mode=VIDEO_MODE_AUTO; + v->signal = fmi_getsigstr(fmi); + return 0; + } + case VIDIOCSTUNER: + { + struct video_tuner *v = arg; + if(v->tuner!=0) + return -EINVAL; + fmi->flags = v->flags & VIDEO_TUNER_LOW; + /* Only 1 tuner so no setting needed ! */ + return 0; + } + case VIDIOCGFREQ: + { + unsigned long *freq = arg; + *freq = fmi->curfreq; + if (!(fmi->flags & VIDEO_TUNER_LOW)) + *freq /= 1000; + return 0; + } + case VIDIOCSFREQ: + { + unsigned long *freq = arg; + if (!(fmi->flags & VIDEO_TUNER_LOW)) + *freq *= 1000; + if (*freq < RSF16_MINFREQ || *freq > RSF16_MAXFREQ ) + return -EINVAL; + /*rounding in steps of 800 to match th freq + that will be used */ + fmi->curfreq = (*freq/800)*800; + fmi_setfreq(fmi); + return 0; + } + case VIDIOCGAUDIO: + { + struct video_audio *v = arg; + memset(v,0,sizeof(*v)); + v->flags=( (!fmi->curvol)*VIDEO_AUDIO_MUTE | VIDEO_AUDIO_MUTABLE); + strcpy(v->name, "Radio"); + v->mode=VIDEO_SOUND_STEREO; + return 0; + } + case VIDIOCSAUDIO: + { + struct video_audio *v = arg; + if(v->audio) + return -EINVAL; + fmi->curvol= v->flags&VIDEO_AUDIO_MUTE ? 0 : 1; + fmi->curvol ? + fmi_unmute(fmi->port) : fmi_mute(fmi->port); + return 0; + } + case VIDIOCGUNIT: + { + struct video_unit *v = arg; + v->video=VIDEO_NO_UNIT; + v->vbi=VIDEO_NO_UNIT; + v->radio=dev->minor; + v->audio=0; /* How do we find out this??? */ + v->teletext=VIDEO_NO_UNIT; + return 0; + } + default: + return -ENOIOCTLCMD; + } +} + +static int fmi_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + return video_usercopy(inode, file, cmd, arg, fmi_do_ioctl); +} + +static struct fmi_device fmi_unit; + +static struct file_operations fmi_fops = { + .owner = THIS_MODULE, + .open = video_exclusive_open, + .release = video_exclusive_release, + .ioctl = fmi_ioctl, + .llseek = no_llseek, +}; + +static struct video_device fmi_radio= +{ + .owner = THIS_MODULE, + .name = "SF16FMx radio", + .type = VID_TYPE_TUNER, + .hardware = VID_HARDWARE_SF16MI, + .fops = &fmi_fops, +}; + +/* ladis: this is my card. does any other types exist? */ +static struct isapnp_device_id id_table[] __devinitdata = { + { ISAPNP_ANY_ID, ISAPNP_ANY_ID, + ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0}, + { ISAPNP_CARD_END, }, +}; + +MODULE_DEVICE_TABLE(isapnp, id_table); + +static int isapnp_fmi_probe(void) +{ + int i = 0; + + while (id_table[i].card_vendor != 0 && dev == NULL) { + dev = pnp_find_dev(NULL, id_table[i].vendor, + id_table[i].function, NULL); + i++; + } + + if (!dev) + return -ENODEV; + if (pnp_device_attach(dev) < 0) + return -EAGAIN; + if (pnp_activate_dev(dev) < 0) { + printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n"); + pnp_device_detach(dev); + return -ENOMEM; + } + if (!pnp_port_valid(dev, 0)) { + pnp_device_detach(dev); + return -ENODEV; + } + + i = pnp_port_start(dev, 0); + printk ("radio-sf16fmi: PnP reports card at %#x\n", i); + + return i; +} + +static int __init fmi_init(void) +{ + if (io < 0) + io = isapnp_fmi_probe(); + if (io < 0) { + printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n"); + return io; + } + if (!request_region(io, 2, "radio-sf16fmi")) { + printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io); + return -EBUSY; + } + + fmi_unit.port = io; + fmi_unit.curvol = 0; + fmi_unit.curfreq = 0; + fmi_unit.flags = VIDEO_TUNER_LOW; + fmi_radio.priv = &fmi_unit; + + init_MUTEX(&lock); + + if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) == -1) { + release_region(io, 2); + return -EINVAL; + } + + printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io); + /* mute card - prevents noisy bootups */ + fmi_mute(io); + return 0; +} + +MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood"); +MODULE_DESCRIPTION("A driver for the SF16MI radio."); +MODULE_LICENSE("GPL"); + +module_param(io, int, 0); +MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)"); +module_param(radio_nr, int, 0); + +static void __exit fmi_cleanup_module(void) +{ + video_unregister_device(&fmi_radio); + release_region(io, 2); + if (dev) + pnp_device_detach(dev); +} + +module_init(fmi_init); +module_exit(fmi_cleanup_module); |