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 000000000000..5b748a48ce72
--- /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);