2 * Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
3 * (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
5 * Based in the radio Maestro PCI driver. Actually it uses the same chip
6 * for radio but different pci controller.
8 * I didn't have any specs I reversed engineered the protocol from
9 * the windows driver (radio.dll).
11 * The card uses the TEA5757 chip that includes a search function but it
12 * is useless as I haven't found any way to read back the frequency. If
13 * anybody does please mail me.
15 * For the pdf file see:
16 * http://www.semiconductors.philips.com/pip/TEA5757H/V1
21 * - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
23 * 0.75 Sun Feb 4 22:51:27 EET 2001
25 * - removed support for multiple devices as it didn't work anyway
28 * - card unmutes if you change frequency
30 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/ioport.h>
37 #include <linux/delay.h>
39 #include <asm/uaccess.h>
40 #include <linux/mutex.h>
42 #include <linux/pci.h>
43 #include <linux/videodev2.h>
44 #include <media/v4l2-common.h>
46 #define DRIVER_VERSION "0.76"
48 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
49 #define RADIO_VERSION KERNEL_VERSION(0,7,6)
51 static struct v4l2_queryctrl radio_qctrl[] = {
53 .id = V4L2_CID_AUDIO_MUTE,
58 .type = V4L2_CTRL_TYPE_BOOLEAN,
62 #ifndef PCI_VENDOR_ID_GUILLEMOT
63 #define PCI_VENDOR_ID_GUILLEMOT 0x5046
66 #ifndef PCI_DEVICE_ID_GUILLEMOT
67 #define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
71 /* TEA5757 pin mappings */
72 static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
74 static int radio_nr = -1;
75 module_param(radio_nr, int, 0);
78 #define FREQ_LO 50*16000
79 #define FREQ_HI 150*16000
81 #define FREQ_IF 171200 /* 10.7*16000 */
82 #define FREQ_STEP 200 /* 12.5*16 */
84 #define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
85 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
87 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
90 static int radio_ioctl(struct inode *inode, struct file *file,
91 unsigned int cmd, unsigned long arg);
93 static const struct file_operations maxiradio_fops = {
95 .open = video_exclusive_open,
96 .release = video_exclusive_release,
98 .compat_ioctl = v4l_compat_ioctl32,
101 static struct video_device maxiradio_radio =
103 .owner = THIS_MODULE,
104 .name = "Maxi Radio FM2000 radio",
105 .type = VID_TYPE_TUNER,
106 .fops = &maxiradio_fops,
109 static struct radio_device
111 __u16 io, /* base of radio io */
112 muted, /* VIDEO_AUDIO_MUTE */
113 stereo, /* VIDEO_TUNER_STEREO_ON */
114 tuned; /* signal strength (0 or 0xffff) */
119 } radio_unit = {0, 0, 0, 0, };
122 static void outbit(unsigned long bit, __u16 io)
126 outb( power|wren|data ,io); udelay(4);
127 outb( power|wren|data|clk ,io); udelay(4);
128 outb( power|wren|data ,io); udelay(4);
132 outb( power|wren ,io); udelay(4);
133 outb( power|wren|clk ,io); udelay(4);
134 outb( power|wren ,io); udelay(4);
138 static void turn_power(__u16 io, int p)
140 if(p != 0) outb(power, io); else outb(0,io);
144 static void set_freq(__u16 io, __u32 data)
146 unsigned long int si;
149 /* TEA5757 shift register bits (see pdf) */
151 outbit(0,io); // 24 search
152 outbit(1,io); // 23 search up/down
154 outbit(0,io); // 22 stereo/mono
156 outbit(0,io); // 21 band
157 outbit(0,io); // 20 band (only 00=FM works I think)
159 outbit(0,io); // 19 port ?
160 outbit(0,io); // 18 port ?
162 outbit(0,io); // 17 search level
163 outbit(0,io); // 16 search level
166 for(bl = 1; bl <= 16 ; bl++) { outbit(data & si,io); si >>=1; }
171 static int get_stereo(__u16 io)
173 outb(power,io); udelay(4);
174 return !(inb(io) & mo_st);
177 static int get_tune(__u16 io)
179 outb(power+clk,io); udelay(4);
180 return !(inb(io) & mo_st);
184 static inline int radio_function(struct inode *inode, struct file *file,
185 unsigned int cmd, void *arg)
187 struct video_device *dev = video_devdata(file);
188 struct radio_device *card=dev->priv;
191 case VIDIOC_QUERYCAP:
193 struct v4l2_capability *v = arg;
194 memset(v,0,sizeof(*v));
195 strlcpy(v->driver, "radio-maxiradio", sizeof (v->driver));
196 strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof (v->card));
197 sprintf(v->bus_info,"ISA");
198 v->version = RADIO_VERSION;
199 v->capabilities = V4L2_CAP_TUNER;
205 struct v4l2_tuner *v = arg;
210 memset(v,0,sizeof(*v));
211 strcpy(v->name, "FM");
212 v->type = V4L2_TUNER_RADIO;
215 v->rangehigh=FREQ_HI;
216 v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
217 v->capability=V4L2_TUNER_CAP_LOW;
218 if(get_stereo(card->io))
219 v->audmode = V4L2_TUNER_MODE_STEREO;
221 v->audmode = V4L2_TUNER_MODE_MONO;
222 v->signal=0xffff*get_tune(card->io);
228 struct v4l2_tuner *v = arg;
235 case VIDIOC_S_FREQUENCY:
237 struct v4l2_frequency *f = arg;
239 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
242 card->freq = f->frequency;
243 set_freq(card->io, FREQ2BITS(card->freq));
247 case VIDIOC_G_FREQUENCY:
249 struct v4l2_frequency *f = arg;
251 f->type = V4L2_TUNER_RADIO;
252 f->frequency = card->freq;
256 case VIDIOC_QUERYCTRL:
258 struct v4l2_queryctrl *qc = arg;
261 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
262 if (qc->id && qc->id == radio_qctrl[i].id) {
263 memcpy(qc, &(radio_qctrl[i]),
272 struct v4l2_control *ctrl= arg;
275 case V4L2_CID_AUDIO_MUTE:
276 ctrl->value=card->muted;
283 struct v4l2_control *ctrl= arg;
286 case V4L2_CID_AUDIO_MUTE:
287 card->muted = ctrl->value;
289 turn_power(card->io, 0);
291 set_freq(card->io, FREQ2BITS(card->freq));
298 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
304 static int radio_ioctl(struct inode *inode, struct file *file,
305 unsigned int cmd, unsigned long arg)
307 struct video_device *dev = video_devdata(file);
308 struct radio_device *card=dev->priv;
311 mutex_lock(&card->lock);
312 ret = video_usercopy(inode, file, cmd, arg, radio_function);
313 mutex_unlock(&card->lock);
317 MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
318 MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
319 MODULE_LICENSE("GPL");
322 static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
324 if(!request_region(pci_resource_start(pdev, 0),
325 pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
326 printk(KERN_ERR "radio-maxiradio: can't reserve I/O ports\n");
330 if (pci_enable_device(pdev))
331 goto err_out_free_region;
333 radio_unit.io = pci_resource_start(pdev, 0);
334 mutex_init(&radio_unit.lock);
335 maxiradio_radio.priv = &radio_unit;
337 if(video_register_device(&maxiradio_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
338 printk("radio-maxiradio: can't register device!");
339 goto err_out_free_region;
342 printk(KERN_INFO "radio-maxiradio: version "
349 printk(KERN_INFO "radio-maxiradio: found Guillemot MAXI Radio device (io = 0x%x)\n",
354 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
359 static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
361 video_unregister_device(&maxiradio_radio);
362 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
365 static struct pci_device_id maxiradio_pci_tbl[] = {
366 { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
367 PCI_ANY_ID, PCI_ANY_ID, },
371 MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
373 static struct pci_driver maxiradio_driver = {
374 .name = "radio-maxiradio",
375 .id_table = maxiradio_pci_tbl,
376 .probe = maxiradio_init_one,
377 .remove = __devexit_p(maxiradio_remove_one),
380 static int __init maxiradio_radio_init(void)
382 return pci_register_driver(&maxiradio_driver);
385 static void __exit maxiradio_radio_exit(void)
387 pci_unregister_driver(&maxiradio_driver);
390 module_init(maxiradio_radio_init);
391 module_exit(maxiradio_radio_exit);