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 * (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
31 * - Conversion to V4L2 API
32 * - Uses video_ioctl2 for parsing and to add debug support
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/ioport.h>
39 #include <linux/delay.h>
41 #include <asm/uaccess.h>
42 #include <linux/mutex.h>
44 #include <linux/pci.h>
45 #include <linux/videodev2.h>
46 #include <media/v4l2-common.h>
48 #define DRIVER_VERSION "0.76"
50 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
51 #define RADIO_VERSION KERNEL_VERSION(0,7,6)
53 static struct v4l2_queryctrl radio_qctrl[] = {
55 .id = V4L2_CID_AUDIO_MUTE,
60 .type = V4L2_CTRL_TYPE_BOOLEAN,
64 #ifndef PCI_VENDOR_ID_GUILLEMOT
65 #define PCI_VENDOR_ID_GUILLEMOT 0x5046
68 #ifndef PCI_DEVICE_ID_GUILLEMOT
69 #define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
73 /* TEA5757 pin mappings */
74 static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
76 static int radio_nr = -1;
77 module_param(radio_nr, int, 0);
80 #define FREQ_LO 50*16000
81 #define FREQ_HI 150*16000
83 #define FREQ_IF 171200 /* 10.7*16000 */
84 #define FREQ_STEP 200 /* 12.5*16 */
86 #define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
87 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
89 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
92 static const struct file_operations maxiradio_fops = {
94 .open = video_exclusive_open,
95 .release = video_exclusive_release,
96 .ioctl = video_ioctl2,
97 .compat_ioctl = v4l_compat_ioctl32,
101 static struct radio_device
103 __u16 io, /* base of radio io */
104 muted, /* VIDEO_AUDIO_MUTE */
105 stereo, /* VIDEO_TUNER_STEREO_ON */
106 tuned; /* signal strength (0 or 0xffff) */
111 } radio_unit = {0, 0, 0, 0, };
114 static void outbit(unsigned long bit, __u16 io)
118 outb( power|wren|data ,io); udelay(4);
119 outb( power|wren|data|clk ,io); udelay(4);
120 outb( power|wren|data ,io); udelay(4);
124 outb( power|wren ,io); udelay(4);
125 outb( power|wren|clk ,io); udelay(4);
126 outb( power|wren ,io); udelay(4);
130 static void turn_power(__u16 io, int p)
132 if(p != 0) outb(power, io); else outb(0,io);
136 static void set_freq(__u16 io, __u32 data)
138 unsigned long int si;
141 /* TEA5757 shift register bits (see pdf) */
143 outbit(0,io); // 24 search
144 outbit(1,io); // 23 search up/down
146 outbit(0,io); // 22 stereo/mono
148 outbit(0,io); // 21 band
149 outbit(0,io); // 20 band (only 00=FM works I think)
151 outbit(0,io); // 19 port ?
152 outbit(0,io); // 18 port ?
154 outbit(0,io); // 17 search level
155 outbit(0,io); // 16 search level
158 for(bl = 1; bl <= 16 ; bl++) { outbit(data & si,io); si >>=1; }
163 static int get_stereo(__u16 io)
165 outb(power,io); udelay(4);
166 return !(inb(io) & mo_st);
169 static int get_tune(__u16 io)
171 outb(power+clk,io); udelay(4);
172 return !(inb(io) & mo_st);
176 static int vidioc_querycap (struct file *file, void *priv,
177 struct v4l2_capability *v)
179 strlcpy(v->driver, "radio-maxiradio", sizeof (v->driver));
180 strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof (v->card));
181 sprintf(v->bus_info,"ISA");
182 v->version = RADIO_VERSION;
183 v->capabilities = V4L2_CAP_TUNER;
188 static int vidioc_g_tuner (struct file *file, void *priv,
189 struct v4l2_tuner *v)
191 struct video_device *dev = video_devdata(file);
192 struct radio_device *card=dev->priv;
197 memset(v,0,sizeof(*v));
198 strcpy(v->name, "FM");
199 v->type = V4L2_TUNER_RADIO;
202 v->rangehigh=FREQ_HI;
203 v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
204 v->capability=V4L2_TUNER_CAP_LOW;
205 if(get_stereo(card->io))
206 v->audmode = V4L2_TUNER_MODE_STEREO;
208 v->audmode = V4L2_TUNER_MODE_MONO;
209 v->signal=0xffff*get_tune(card->io);
214 static int vidioc_s_tuner (struct file *file, void *priv,
215 struct v4l2_tuner *v)
223 static int vidioc_g_audio (struct file *file, void *priv,
224 struct v4l2_audio *a)
229 strcpy(a->name, "FM");
230 a->capability = V4L2_AUDCAP_STEREO;
234 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
240 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
248 static int vidioc_s_audio (struct file *file, void *priv,
249 struct v4l2_audio *a)
257 static int vidioc_s_frequency (struct file *file, void *priv,
258 struct v4l2_frequency *f)
260 struct video_device *dev = video_devdata(file);
261 struct radio_device *card=dev->priv;
263 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
266 card->freq = f->frequency;
267 set_freq(card->io, FREQ2BITS(card->freq));
273 static int vidioc_g_frequency (struct file *file, void *priv,
274 struct v4l2_frequency *f)
276 struct video_device *dev = video_devdata(file);
277 struct radio_device *card=dev->priv;
279 f->type = V4L2_TUNER_RADIO;
280 f->frequency = card->freq;
285 static int vidioc_queryctrl (struct file *file, void *priv,
286 struct v4l2_queryctrl *qc)
290 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
291 if (qc->id && qc->id == radio_qctrl[i].id) {
292 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
299 static int vidioc_g_ctrl (struct file *file, void *priv,
300 struct v4l2_control *ctrl)
302 struct video_device *dev = video_devdata(file);
303 struct radio_device *card=dev->priv;
306 case V4L2_CID_AUDIO_MUTE:
307 ctrl->value=card->muted;
313 static int vidioc_s_ctrl (struct file *file, void *priv,
314 struct v4l2_control *ctrl)
316 struct video_device *dev = video_devdata(file);
317 struct radio_device *card=dev->priv;
320 case V4L2_CID_AUDIO_MUTE:
321 card->muted = ctrl->value;
323 turn_power(card->io, 0);
325 set_freq(card->io, FREQ2BITS(card->freq));
331 static struct video_device maxiradio_radio =
333 .owner = THIS_MODULE,
334 .name = "Maxi Radio FM2000 radio",
335 .type = VID_TYPE_TUNER,
336 .fops = &maxiradio_fops,
338 .vidioc_querycap = vidioc_querycap,
339 .vidioc_g_tuner = vidioc_g_tuner,
340 .vidioc_s_tuner = vidioc_s_tuner,
341 .vidioc_g_audio = vidioc_g_audio,
342 .vidioc_s_audio = vidioc_s_audio,
343 .vidioc_g_input = vidioc_g_input,
344 .vidioc_s_input = vidioc_s_input,
345 .vidioc_g_frequency = vidioc_g_frequency,
346 .vidioc_s_frequency = vidioc_s_frequency,
347 .vidioc_queryctrl = vidioc_queryctrl,
348 .vidioc_g_ctrl = vidioc_g_ctrl,
349 .vidioc_s_ctrl = vidioc_s_ctrl,
353 static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
355 if(!request_region(pci_resource_start(pdev, 0),
356 pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
357 printk(KERN_ERR "radio-maxiradio: can't reserve I/O ports\n");
361 if (pci_enable_device(pdev))
362 goto err_out_free_region;
364 radio_unit.io = pci_resource_start(pdev, 0);
365 mutex_init(&radio_unit.lock);
366 maxiradio_radio.priv = &radio_unit;
368 if(video_register_device(&maxiradio_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
369 printk("radio-maxiradio: can't register device!");
370 goto err_out_free_region;
373 printk(KERN_INFO "radio-maxiradio: version "
380 printk(KERN_INFO "radio-maxiradio: found Guillemot MAXI Radio device (io = 0x%x)\n",
385 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
390 static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
392 video_unregister_device(&maxiradio_radio);
393 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
396 static struct pci_device_id maxiradio_pci_tbl[] = {
397 { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
398 PCI_ANY_ID, PCI_ANY_ID, },
402 MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
404 static struct pci_driver maxiradio_driver = {
405 .name = "radio-maxiradio",
406 .id_table = maxiradio_pci_tbl,
407 .probe = maxiradio_init_one,
408 .remove = __devexit_p(maxiradio_remove_one),
411 static int __init maxiradio_radio_init(void)
413 return pci_register_driver(&maxiradio_driver);
416 static void __exit maxiradio_radio_exit(void)
418 pci_unregister_driver(&maxiradio_driver);
421 module_init(maxiradio_radio_init);
422 module_exit(maxiradio_radio_exit);
424 MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
425 MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
426 MODULE_LICENSE("GPL");
428 module_param_named(debug,maxiradio_radio.debug, int, 0644);
429 MODULE_PARM_DESC(debug,"activates debug info");