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>
38 #include <linux/sched.h>
40 #include <asm/uaccess.h>
41 #include <linux/mutex.h>
43 #include <linux/pci.h>
44 #include <linux/videodev2.h>
45 #include <media/v4l2-common.h>
47 #define DRIVER_VERSION "0.76"
49 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
50 #define RADIO_VERSION KERNEL_VERSION(0,7,6)
52 static struct v4l2_queryctrl radio_qctrl[] = {
54 .id = V4L2_CID_AUDIO_MUTE,
59 .type = V4L2_CTRL_TYPE_BOOLEAN,
63 #ifndef PCI_VENDOR_ID_GUILLEMOT
64 #define PCI_VENDOR_ID_GUILLEMOT 0x5046
67 #ifndef PCI_DEVICE_ID_GUILLEMOT
68 #define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
72 /* TEA5757 pin mappings */
73 static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
75 static int radio_nr = -1;
76 module_param(radio_nr, int, 0);
79 #define FREQ_LO 50*16000
80 #define FREQ_HI 150*16000
82 #define FREQ_IF 171200 /* 10.7*16000 */
83 #define FREQ_STEP 200 /* 12.5*16 */
85 #define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
86 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
88 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
91 static int radio_ioctl(struct inode *inode, struct file *file,
92 unsigned int cmd, unsigned long arg);
94 static struct file_operations maxiradio_fops = {
96 .open = video_exclusive_open,
97 .release = video_exclusive_release,
99 .compat_ioctl = v4l_compat_ioctl32,
102 static struct video_device maxiradio_radio =
104 .owner = THIS_MODULE,
105 .name = "Maxi Radio FM2000 radio",
106 .type = VID_TYPE_TUNER,
107 .fops = &maxiradio_fops,
110 static struct radio_device
112 __u16 io, /* base of radio io */
113 muted, /* VIDEO_AUDIO_MUTE */
114 stereo, /* VIDEO_TUNER_STEREO_ON */
115 tuned; /* signal strength (0 or 0xffff) */
120 } radio_unit = {0, 0, 0, 0, };
123 static void outbit(unsigned long bit, __u16 io)
127 outb( power|wren|data ,io); udelay(4);
128 outb( power|wren|data|clk ,io); udelay(4);
129 outb( power|wren|data ,io); udelay(4);
133 outb( power|wren ,io); udelay(4);
134 outb( power|wren|clk ,io); udelay(4);
135 outb( power|wren ,io); udelay(4);
139 static void turn_power(__u16 io, int p)
141 if(p != 0) outb(power, io); else outb(0,io);
145 static void set_freq(__u16 io, __u32 data)
147 unsigned long int si;
150 /* TEA5757 shift register bits (see pdf) */
152 outbit(0,io); // 24 search
153 outbit(1,io); // 23 search up/down
155 outbit(0,io); // 22 stereo/mono
157 outbit(0,io); // 21 band
158 outbit(0,io); // 20 band (only 00=FM works I think)
160 outbit(0,io); // 19 port ?
161 outbit(0,io); // 18 port ?
163 outbit(0,io); // 17 search level
164 outbit(0,io); // 16 search level
167 for(bl = 1; bl <= 16 ; bl++) { outbit(data & si,io); si >>=1; }
172 static int get_stereo(__u16 io)
174 outb(power,io); udelay(4);
175 return !(inb(io) & mo_st);
178 static int get_tune(__u16 io)
180 outb(power+clk,io); udelay(4);
181 return !(inb(io) & mo_st);
185 static inline int radio_function(struct inode *inode, struct file *file,
186 unsigned int cmd, void *arg)
188 struct video_device *dev = video_devdata(file);
189 struct radio_device *card=dev->priv;
192 case VIDIOC_QUERYCAP:
194 struct v4l2_capability *v = arg;
195 memset(v,0,sizeof(*v));
196 strlcpy(v->driver, "radio-maxiradio", sizeof (v->driver));
197 strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof (v->card));
198 sprintf(v->bus_info,"ISA");
199 v->version = RADIO_VERSION;
200 v->capabilities = V4L2_CAP_TUNER;
206 struct v4l2_tuner *v = arg;
211 memset(v,0,sizeof(*v));
212 strcpy(v->name, "FM");
213 v->type = V4L2_TUNER_RADIO;
216 v->rangehigh=FREQ_HI;
217 v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
218 v->capability=V4L2_TUNER_CAP_LOW;
219 if(get_stereo(card->io))
220 v->audmode = V4L2_TUNER_MODE_STEREO;
222 v->audmode = V4L2_TUNER_MODE_MONO;
223 v->signal=0xffff*get_tune(card->io);
229 struct v4l2_tuner *v = arg;
236 case VIDIOC_S_FREQUENCY:
238 struct v4l2_frequency *f = arg;
240 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
243 card->freq = f->frequency;
244 set_freq(card->io, FREQ2BITS(card->freq));
248 case VIDIOC_G_FREQUENCY:
250 struct v4l2_frequency *f = arg;
252 f->type = V4L2_TUNER_RADIO;
253 f->frequency = card->freq;
257 case VIDIOC_QUERYCTRL:
259 struct v4l2_queryctrl *qc = arg;
262 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
263 if (qc->id && qc->id == radio_qctrl[i].id) {
264 memcpy(qc, &(radio_qctrl[i]),
273 struct v4l2_control *ctrl= arg;
276 case V4L2_CID_AUDIO_MUTE:
277 ctrl->value=card->muted;
284 struct v4l2_control *ctrl= arg;
287 case V4L2_CID_AUDIO_MUTE:
288 card->muted = ctrl->value;
290 turn_power(card->io, 0);
292 set_freq(card->io, FREQ2BITS(card->freq));
299 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
305 static int radio_ioctl(struct inode *inode, struct file *file,
306 unsigned int cmd, unsigned long arg)
308 struct video_device *dev = video_devdata(file);
309 struct radio_device *card=dev->priv;
312 mutex_lock(&card->lock);
313 ret = video_usercopy(inode, file, cmd, arg, radio_function);
314 mutex_unlock(&card->lock);
318 MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
319 MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
320 MODULE_LICENSE("GPL");
323 static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
325 if(!request_region(pci_resource_start(pdev, 0),
326 pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
327 printk(KERN_ERR "radio-maxiradio: can't reserve I/O ports\n");
331 if (pci_enable_device(pdev))
332 goto err_out_free_region;
334 radio_unit.io = pci_resource_start(pdev, 0);
335 mutex_init(&radio_unit.lock);
336 maxiradio_radio.priv = &radio_unit;
338 if(video_register_device(&maxiradio_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
339 printk("radio-maxiradio: can't register device!");
340 goto err_out_free_region;
343 printk(KERN_INFO "radio-maxiradio: version "
350 printk(KERN_INFO "radio-maxiradio: found Guillemot MAXI Radio device (io = 0x%x)\n",
355 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
360 static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
362 video_unregister_device(&maxiradio_radio);
363 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
366 static struct pci_device_id maxiradio_pci_tbl[] = {
367 { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
368 PCI_ANY_ID, PCI_ANY_ID, },
372 MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
374 static struct pci_driver maxiradio_driver = {
375 .name = "radio-maxiradio",
376 .id_table = maxiradio_pci_tbl,
377 .probe = maxiradio_init_one,
378 .remove = __devexit_p(maxiradio_remove_one),
381 static int __init maxiradio_radio_init(void)
383 return pci_register_driver(&maxiradio_driver);
386 static void __exit maxiradio_radio_exit(void)
388 pci_unregister_driver(&maxiradio_driver);
391 module_init(maxiradio_radio_init);
392 module_exit(maxiradio_radio_exit);