diff options
Diffstat (limited to 'drivers/media/radio/radio-maxiradio.c')
-rw-r--r-- | drivers/media/radio/radio-maxiradio.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-maxiradio.c b/drivers/media/radio/radio-maxiradio.c new file mode 100644 index 00000000000..5b748a48ce7 --- /dev/null +++ b/drivers/media/radio/radio-maxiradio.c @@ -0,0 +1,349 @@ +/* + * Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux + * (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net> + * + * Based in the radio Maestro PCI driver. Actually it uses the same chip + * for radio but different pci controller. + * + * I didn't have any specs I reversed engineered the protocol from + * the windows driver (radio.dll). + * + * The card uses the TEA5757 chip that includes a search function but it + * is useless as I haven't found any way to read back the frequency. If + * anybody does please mail me. + * + * For the pdf file see: + * http://www.semiconductors.philips.com/pip/TEA5757H/V1 + * + * + * CHANGES: + * 0.75b + * - better pci interface thanks to Francois Romieu <romieu@cogenit.fr> + * + * 0.75 + * - tiding up + * - removed support for multiple devices as it didn't work anyway + * + * BUGS: + * - card unmutes if you change frequency + * + */ + + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/semaphore.h> +#include <linux/pci.h> +#include <linux/videodev.h> + +/* version 0.75 Sun Feb 4 22:51:27 EET 2001 */ +#define DRIVER_VERSION "0.75" + +#ifndef PCI_VENDOR_ID_GUILLEMOT +#define PCI_VENDOR_ID_GUILLEMOT 0x5046 +#endif + +#ifndef PCI_DEVICE_ID_GUILLEMOT +#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001 +#endif + + +/* TEA5757 pin mappings */ +static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ; + +static int radio_nr = -1; +module_param(radio_nr, int, 0); + + +#define FREQ_LO 50*16000 +#define FREQ_HI 150*16000 + +#define FREQ_IF 171200 /* 10.7*16000 */ +#define FREQ_STEP 200 /* 12.5*16 */ + +#define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\ + /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */ + +#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF) + + +static int radio_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg); + +static struct file_operations maxiradio_fops = { + .owner = THIS_MODULE, + .open = video_exclusive_open, + .release = video_exclusive_release, + .ioctl = radio_ioctl, + .llseek = no_llseek, +}; +static struct video_device maxiradio_radio = +{ + .owner = THIS_MODULE, + .name = "Maxi Radio FM2000 radio", + .type = VID_TYPE_TUNER, + .hardware = VID_HARDWARE_SF16MI, + .fops = &maxiradio_fops, +}; + +static struct radio_device +{ + __u16 io, /* base of radio io */ + muted, /* VIDEO_AUDIO_MUTE */ + stereo, /* VIDEO_TUNER_STEREO_ON */ + tuned; /* signal strength (0 or 0xffff) */ + + unsigned long freq; + + struct semaphore lock; +} radio_unit = {0, 0, 0, 0, }; + + +static void outbit(unsigned long bit, __u16 io) +{ + if(bit != 0) + { + outb( power|wren|data ,io); udelay(4); + outb( power|wren|data|clk ,io); udelay(4); + outb( power|wren|data ,io); udelay(4); + } + else + { + outb( power|wren ,io); udelay(4); + outb( power|wren|clk ,io); udelay(4); + outb( power|wren ,io); udelay(4); + } +} + +static void turn_power(__u16 io, int p) +{ + if(p != 0) outb(power, io); else outb(0,io); +} + + +static void set_freq(__u16 io, __u32 data) +{ + unsigned long int si; + int bl; + + /* TEA5757 shift register bits (see pdf) */ + + outbit(0,io); // 24 search + outbit(1,io); // 23 search up/down + + outbit(0,io); // 22 stereo/mono + + outbit(0,io); // 21 band + outbit(0,io); // 20 band (only 00=FM works I think) + + outbit(0,io); // 19 port ? + outbit(0,io); // 18 port ? + + outbit(0,io); // 17 search level + outbit(0,io); // 16 search level + + si = 0x8000; + for(bl = 1; bl <= 16 ; bl++) { outbit(data & si,io); si >>=1; } + + outb(power,io); +} + +static int get_stereo(__u16 io) +{ + outb(power,io); udelay(4); + return !(inb(io) & mo_st); +} + +static int get_tune(__u16 io) +{ + outb(power+clk,io); udelay(4); + return !(inb(io) & mo_st); +} + + +inline static int radio_function(struct inode *inode, struct file *file, + unsigned int cmd, void *arg) +{ + struct video_device *dev = video_devdata(file); + struct radio_device *card=dev->priv; + + switch(cmd) { + case VIDIOCGCAP: { + struct video_capability *v = arg; + + memset(v,0,sizeof(*v)); + strcpy(v->name, "Maxi Radio FM2000 radio"); + v->type=VID_TYPE_TUNER; + v->channels=v->audios=1; + return 0; + } + case VIDIOCGTUNER: { + struct video_tuner *v = arg; + + if(v->tuner) + return -EINVAL; + + card->stereo = 0xffff * get_stereo(card->io); + card->tuned = 0xffff * get_tune(card->io); + + v->flags = VIDEO_TUNER_LOW | card->stereo; + v->signal = card->tuned; + + strcpy(v->name, "FM"); + + v->rangelow = FREQ_LO; + v->rangehigh = FREQ_HI; + v->mode = VIDEO_MODE_AUTO; + + return 0; + } + case VIDIOCSTUNER: { + struct video_tuner *v = arg; + if(v->tuner!=0) + return -EINVAL; + return 0; + } + case VIDIOCGFREQ: { + unsigned long *freq = arg; + + *freq = card->freq; + return 0; + } + case VIDIOCSFREQ: { + unsigned long *freq = arg; + + if (*freq < FREQ_LO || *freq > FREQ_HI) + return -EINVAL; + card->freq = *freq; + set_freq(card->io, FREQ2BITS(card->freq)); + msleep(125); + return 0; + } + case VIDIOCGAUDIO: { + struct video_audio *v = arg; + memset(v,0,sizeof(*v)); + strcpy(v->name, "Radio"); + v->flags=VIDEO_AUDIO_MUTABLE | card->muted; + v->mode=VIDEO_SOUND_STEREO; + return 0; + } + + case VIDIOCSAUDIO: { + struct video_audio *v = arg; + + if(v->audio) + return -EINVAL; + card->muted = v->flags & VIDEO_AUDIO_MUTE; + if(card->muted) + turn_power(card->io, 0); + else + set_freq(card->io, FREQ2BITS(card->freq)); + 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; + v->teletext=VIDEO_NO_UNIT; + return 0; + } + default: return -ENOIOCTLCMD; + } +} + +static int radio_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct video_device *dev = video_devdata(file); + struct radio_device *card=dev->priv; + int ret; + + down(&card->lock); + ret = video_usercopy(inode, file, cmd, arg, radio_function); + up(&card->lock); + return ret; +} + +MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net"); +MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio."); +MODULE_LICENSE("GPL"); + + +static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + if(!request_region(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) { + printk(KERN_ERR "radio-maxiradio: can't reserve I/O ports\n"); + goto err_out; + } + + if (pci_enable_device(pdev)) + goto err_out_free_region; + + radio_unit.io = pci_resource_start(pdev, 0); + init_MUTEX(&radio_unit.lock); + maxiradio_radio.priv = &radio_unit; + + if(video_register_device(&maxiradio_radio, VFL_TYPE_RADIO, radio_nr)==-1) { + printk("radio-maxiradio: can't register device!"); + goto err_out_free_region; + } + + printk(KERN_INFO "radio-maxiradio: version " + DRIVER_VERSION + " time " + __TIME__ " " + __DATE__ + "\n"); + + printk(KERN_INFO "radio-maxiradio: found Guillemot MAXI Radio device (io = 0x%x)\n", + radio_unit.io); + return 0; + +err_out_free_region: + release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); +err_out: + return -ENODEV; +} + +static void __devexit maxiradio_remove_one(struct pci_dev *pdev) +{ + video_unregister_device(&maxiradio_radio); + release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); +} + +static struct pci_device_id maxiradio_pci_tbl[] = { + { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO, + PCI_ANY_ID, PCI_ANY_ID, }, + { 0,} +}; + +MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl); + +static struct pci_driver maxiradio_driver = { + .name = "radio-maxiradio", + .id_table = maxiradio_pci_tbl, + .probe = maxiradio_init_one, + .remove = __devexit_p(maxiradio_remove_one), +}; + +static int __init maxiradio_radio_init(void) +{ + return pci_module_init(&maxiradio_driver); +} + +static void __exit maxiradio_radio_exit(void) +{ + pci_unregister_driver(&maxiradio_driver); +} + +module_init(maxiradio_radio_init); +module_exit(maxiradio_radio_exit); |