1 /* Maestro PCI sound card radio driver for Linux support
2 * (c) 2000 A. Tlalka, atlka@pg.gda.pl
3 * Notes on the hardware
5 * + Frequency control is done digitally
6 * + No volume control - only mute/unmute - you have to use Aux line volume
7 * control on Maestro card to set the volume
8 * + Radio status (tuned/not_tuned and stereo/mono) is valid some time after
9 * frequency setting (>100ms) and only when the radio is unmuted.
11 * + io port is automatically detected - only the first radio is used
13 * + thread access locking additions
16 * + VIDEO_TUNER_LOW is permanent
18 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/ioport.h>
24 #include <linux/delay.h>
26 #include <asm/uaccess.h>
27 #include <linux/pci.h>
28 #include <linux/videodev2.h>
29 #include <media/v4l2-common.h>
30 #include <media/v4l2-ioctl.h>
32 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
33 #define RADIO_VERSION KERNEL_VERSION(0,0,6)
34 #define DRIVER_VERSION "0.06"
36 static struct v4l2_queryctrl radio_qctrl[] = {
38 .id = V4L2_CID_AUDIO_MUTE,
43 .type = V4L2_CTRL_TYPE_BOOLEAN,
47 #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
49 #define IO_MASK 4 /* mask register offset from GPIO_DATA
50 bits 1=unmask write to given bit */
51 #define IO_DIR 8 /* direction register offset from GPIO_DATA
52 bits 0/1=read/write direction */
54 #define GPIO6 0x0040 /* mask bits for GPIO lines */
59 #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
61 #define STR_WREN GPIO8
62 #define STR_MOST GPIO9
64 #define FREQ_LO 50*16000
65 #define FREQ_HI 150*16000
67 #define FREQ_IF 171200 /* 10.7*16000 */
68 #define FREQ_STEP 200 /* 12.5*16 */
70 #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
71 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
73 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
75 static int radio_nr = -1;
76 module_param(radio_nr, int, 0);
78 static unsigned long in_use;
80 static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
82 static int maestro_exclusive_open(struct inode *inode, struct file *file)
84 return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
87 static int maestro_exclusive_release(struct inode *inode, struct file *file)
89 clear_bit(0, &in_use);
93 static void maestro_remove(struct pci_dev *pdev);
95 static struct pci_device_id maestro_r_pci_tbl[] = {
96 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
97 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
98 .class_mask = 0xffff00 },
99 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
100 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
101 .class_mask = 0xffff00 },
104 MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
106 static struct pci_driver maestro_r_driver = {
107 .name = "maestro_radio",
108 .id_table = maestro_r_pci_tbl,
109 .probe = maestro_probe,
110 .remove = __devexit_p(maestro_remove),
113 static const struct file_operations maestro_fops = {
114 .owner = THIS_MODULE,
115 .open = maestro_exclusive_open,
116 .release = maestro_exclusive_release,
117 .ioctl = video_ioctl2,
119 .compat_ioctl = v4l_compat_ioctl32,
124 struct radio_device {
125 u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
126 muted, /* VIDEO_AUDIO_MUTE */
127 stereo, /* VIDEO_TUNER_STEREO_ON */
128 tuned; /* signal strength (0 or 0xffff) */
131 static u32 radio_bits_get(struct radio_device *dev)
133 register u16 io=dev->io, l, rdata;
137 omask = inw(io + IO_MASK);
138 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
143 outw(STR_CLK, io); /* HI state */
146 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
147 outw(0, io); /* LO state */
149 data <<= 1; /* shift data */
152 dev->stereo = rdata & STR_MOST ?
164 outw(omask, io + IO_MASK);
166 return data & 0x3ffe;
169 static void radio_bits_set(struct radio_device *dev, u32 data)
171 register u16 io=dev->io, l, bits;
174 omask = inw(io + IO_MASK);
175 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
176 outw(odir | STR_DATA, io + IO_DIR);
177 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
180 bits = ((data >> 18) & STR_DATA) | STR_WREN ;
181 data <<= 1; /* shift data */
182 outw(bits, io); /* start strobe */
184 outw(bits | STR_CLK, io); /* HI level */
186 outw(bits, io); /* LO level */
194 outw(omask, io + IO_MASK);
195 outw(odir, io + IO_DIR);
199 static int vidioc_querycap(struct file *file, void *priv,
200 struct v4l2_capability *v)
202 strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
203 strlcpy(v->card, "Maestro Radio", sizeof(v->card));
204 sprintf(v->bus_info, "PCI");
205 v->version = RADIO_VERSION;
206 v->capabilities = V4L2_CAP_TUNER;
210 static int vidioc_g_tuner(struct file *file, void *priv,
211 struct v4l2_tuner *v)
213 struct video_device *dev = video_devdata(file);
214 struct radio_device *card = video_get_drvdata(dev);
219 (void)radio_bits_get(card);
221 strcpy(v->name, "FM");
222 v->type = V4L2_TUNER_RADIO;
223 v->rangelow = FREQ_LO;
224 v->rangehigh = FREQ_HI;
225 v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
226 v->capability = V4L2_TUNER_CAP_LOW;
228 v->audmode = V4L2_TUNER_MODE_STEREO;
230 v->audmode = V4L2_TUNER_MODE_MONO;
231 v->signal = card->tuned;
235 static int vidioc_s_tuner(struct file *file, void *priv,
236 struct v4l2_tuner *v)
243 static int vidioc_s_frequency(struct file *file, void *priv,
244 struct v4l2_frequency *f)
246 struct video_device *dev = video_devdata(file);
247 struct radio_device *card = video_get_drvdata(dev);
249 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
251 radio_bits_set(card, FREQ2BITS(f->frequency));
255 static int vidioc_g_frequency(struct file *file, void *priv,
256 struct v4l2_frequency *f)
258 struct video_device *dev = video_devdata(file);
259 struct radio_device *card = video_get_drvdata(dev);
261 f->type = V4L2_TUNER_RADIO;
262 f->frequency = BITS2FREQ(radio_bits_get(card));
266 static int vidioc_queryctrl(struct file *file, void *priv,
267 struct v4l2_queryctrl *qc)
271 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
272 if (qc->id && qc->id == radio_qctrl[i].id) {
273 memcpy(qc, &(radio_qctrl[i]),
281 static int vidioc_g_ctrl(struct file *file, void *priv,
282 struct v4l2_control *ctrl)
284 struct video_device *dev = video_devdata(file);
285 struct radio_device *card = video_get_drvdata(dev);
288 case V4L2_CID_AUDIO_MUTE:
289 ctrl->value = card->muted;
295 static int vidioc_s_ctrl(struct file *file, void *priv,
296 struct v4l2_control *ctrl)
298 struct video_device *dev = video_devdata(file);
299 struct radio_device *card = video_get_drvdata(dev);
300 register u16 io = card->io;
301 register u16 omask = inw(io + IO_MASK);
304 case V4L2_CID_AUDIO_MUTE:
305 outw(~STR_WREN, io + IO_MASK);
306 outw((card->muted = ctrl->value ) ?
309 outw(omask, io + IO_MASK);
316 static int vidioc_g_audio(struct file *file, void *priv,
317 struct v4l2_audio *a)
322 strcpy(a->name, "Radio");
323 a->capability = V4L2_AUDCAP_STEREO;
327 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
333 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
340 static int vidioc_s_audio(struct file *file, void *priv,
341 struct v4l2_audio *a)
348 static u16 __devinit radio_power_on(struct radio_device *dev)
350 register u16 io = dev->io;
354 omask = inw(io + IO_MASK);
355 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
356 outw(odir & ~STR_WREN, io + IO_DIR);
357 dev->muted = inw(io) & STR_WREN ? 0 : 1;
358 outw(odir, io + IO_DIR);
359 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
360 outw(dev->muted ? 0 : STR_WREN, io);
362 outw(omask, io + IO_MASK);
363 ofreq = radio_bits_get(dev);
365 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
366 ofreq = FREQ2BITS(FREQ_LO);
367 radio_bits_set(dev, ofreq);
369 return (ofreq == radio_bits_get(dev));
372 static const struct v4l2_ioctl_ops maestro_ioctl_ops = {
373 .vidioc_querycap = vidioc_querycap,
374 .vidioc_g_tuner = vidioc_g_tuner,
375 .vidioc_s_tuner = vidioc_s_tuner,
376 .vidioc_g_audio = vidioc_g_audio,
377 .vidioc_s_audio = vidioc_s_audio,
378 .vidioc_g_input = vidioc_g_input,
379 .vidioc_s_input = vidioc_s_input,
380 .vidioc_g_frequency = vidioc_g_frequency,
381 .vidioc_s_frequency = vidioc_s_frequency,
382 .vidioc_queryctrl = vidioc_queryctrl,
383 .vidioc_g_ctrl = vidioc_g_ctrl,
384 .vidioc_s_ctrl = vidioc_s_ctrl,
387 static struct video_device maestro_radio = {
388 .name = "Maestro radio",
389 .fops = &maestro_fops,
390 .ioctl_ops = &maestro_ioctl_ops,
393 static int __devinit maestro_probe(struct pci_dev *pdev,
394 const struct pci_device_id *ent)
396 struct radio_device *radio_unit;
397 struct video_device *maestro_radio_inst;
400 retval = pci_enable_device(pdev);
402 dev_err(&pdev->dev, "enabling pci device failed!\n");
408 radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
409 if (radio_unit == NULL) {
410 dev_err(&pdev->dev, "not enough memory\n");
414 radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
416 maestro_radio_inst = video_device_alloc();
417 if (maestro_radio_inst == NULL) {
418 dev_err(&pdev->dev, "not enough memory\n");
422 memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
423 video_set_drvdata(maestro_radio_inst, radio_unit);
424 pci_set_drvdata(pdev, maestro_radio_inst);
426 retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, radio_nr);
428 printk(KERN_ERR "can't register video device!\n");
432 if (!radio_power_on(radio_unit)) {
437 dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " "
439 dev_info(&pdev->dev, "radio chip initialized\n");
443 video_unregister_device(maestro_radio_inst);
445 video_device_release(maestro_radio_inst);
453 static void __devexit maestro_remove(struct pci_dev *pdev)
455 struct video_device *vdev = pci_get_drvdata(pdev);
457 video_unregister_device(vdev);
460 static int __init maestro_radio_init(void)
462 int retval = pci_register_driver(&maestro_r_driver);
465 printk(KERN_ERR "error during registration pci driver\n");
470 static void __exit maestro_radio_exit(void)
472 pci_unregister_driver(&maestro_r_driver);
475 module_init(maestro_radio_init);
476 module_exit(maestro_radio_exit);
478 MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
479 MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
480 MODULE_LICENSE("GPL");