| /* |
| * 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, |
| .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 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); |
| } |
| |
| |
| 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; |
| |
| 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); |