/* * 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 <linux/mutex.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, .compat_ioctl = v4l_compat_ioctl32, .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 mutex 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); } static inline 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; mutex_lock(&card->lock); ret = video_usercopy(inode, file, cmd, arg, radio_function); mutex_unlock(&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); mutex_init(&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_register_driver(&maxiradio_driver); } static void __exit maxiradio_radio_exit(void) { pci_unregister_driver(&maxiradio_driver); } module_init(maxiradio_radio_init); module_exit(maxiradio_radio_exit);