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21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/ioport.h>
24#include <linux/delay.h>
25#include <linux/version.h>
26#include <linux/pci.h>
27#include <linux/videodev2.h>
28#include <linux/io.h>
29#include <linux/slab.h>
30#include <media/v4l2-device.h>
31#include <media/v4l2-ioctl.h>
32
33MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
34MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
35MODULE_LICENSE("GPL");
36
37static int radio_nr = -1;
38module_param(radio_nr, int, 0);
39
40#define RADIO_VERSION KERNEL_VERSION(0, 0, 6)
41#define DRIVER_VERSION "0.06"
42
43#define GPIO_DATA 0x60
44
45#define IO_MASK 4
46
47#define IO_DIR 8
48
49
50#define GPIO6 0x0040
51#define GPIO7 0x0080
52#define GPIO8 0x0100
53#define GPIO9 0x0200
54
55#define STR_DATA GPIO6
56#define STR_CLK GPIO7
57#define STR_WREN GPIO8
58#define STR_MOST GPIO9
59
60#define FREQ_LO 50*16000
61#define FREQ_HI 150*16000
62
63#define FREQ_IF 171200
64#define FREQ_STEP 200
65
66#define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
67 /(FREQ_STEP<<2))<<2)
68
69#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
70
71struct maestro {
72 struct v4l2_device v4l2_dev;
73 struct video_device vdev;
74 struct pci_dev *pdev;
75 struct mutex lock;
76
77 u16 io;
78 u16 muted;
79 u16 stereo;
80 u16 tuned;
81};
82
83static inline struct maestro *to_maestro(struct v4l2_device *v4l2_dev)
84{
85 return container_of(v4l2_dev, struct maestro, v4l2_dev);
86}
87
88static u32 radio_bits_get(struct maestro *dev)
89{
90 u16 io = dev->io, l, rdata;
91 u32 data = 0;
92 u16 omask;
93
94 omask = inw(io + IO_MASK);
95 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
96 outw(0, io);
97 udelay(16);
98
99 for (l = 24; l--;) {
100 outw(STR_CLK, io);
101 udelay(2);
102 if (!l)
103 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
104 outw(0, io);
105 udelay(2);
106 data <<= 1;
107 rdata = inw(io);
108 if (!l)
109 dev->stereo = (rdata & STR_MOST) ? 0 : 1;
110 else if (rdata & STR_DATA)
111 data++;
112 udelay(2);
113 }
114
115 if (dev->muted)
116 outw(STR_WREN, io);
117
118 udelay(4);
119 outw(omask, io + IO_MASK);
120
121 return data & 0x3ffe;
122}
123
124static void radio_bits_set(struct maestro *dev, u32 data)
125{
126 u16 io = dev->io, l, bits;
127 u16 omask, odir;
128
129 omask = inw(io + IO_MASK);
130 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
131 outw(odir | STR_DATA, io + IO_DIR);
132 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
133 udelay(16);
134 for (l = 25; l; l--) {
135 bits = ((data >> 18) & STR_DATA) | STR_WREN;
136 data <<= 1;
137 outw(bits, io);
138 udelay(2);
139 outw(bits | STR_CLK, io);
140 udelay(2);
141 outw(bits, io);
142 udelay(4);
143 }
144
145 if (!dev->muted)
146 outw(0, io);
147
148 udelay(4);
149 outw(omask, io + IO_MASK);
150 outw(odir, io + IO_DIR);
151 msleep(125);
152}
153
154static int vidioc_querycap(struct file *file, void *priv,
155 struct v4l2_capability *v)
156{
157 struct maestro *dev = video_drvdata(file);
158
159 strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
160 strlcpy(v->card, "Maestro Radio", sizeof(v->card));
161 snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
162 v->version = RADIO_VERSION;
163 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
164 return 0;
165}
166
167static int vidioc_g_tuner(struct file *file, void *priv,
168 struct v4l2_tuner *v)
169{
170 struct maestro *dev = video_drvdata(file);
171
172 if (v->index > 0)
173 return -EINVAL;
174
175 mutex_lock(&dev->lock);
176 radio_bits_get(dev);
177
178 strlcpy(v->name, "FM", sizeof(v->name));
179 v->type = V4L2_TUNER_RADIO;
180 v->rangelow = FREQ_LO;
181 v->rangehigh = FREQ_HI;
182 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
183 v->capability = V4L2_TUNER_CAP_LOW;
184 if (dev->stereo)
185 v->audmode = V4L2_TUNER_MODE_STEREO;
186 else
187 v->audmode = V4L2_TUNER_MODE_MONO;
188 v->signal = dev->tuned;
189 mutex_unlock(&dev->lock);
190 return 0;
191}
192
193static int vidioc_s_tuner(struct file *file, void *priv,
194 struct v4l2_tuner *v)
195{
196 return v->index ? -EINVAL : 0;
197}
198
199static int vidioc_s_frequency(struct file *file, void *priv,
200 struct v4l2_frequency *f)
201{
202 struct maestro *dev = video_drvdata(file);
203
204 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
205 return -EINVAL;
206 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
207 return -EINVAL;
208 mutex_lock(&dev->lock);
209 radio_bits_set(dev, FREQ2BITS(f->frequency));
210 mutex_unlock(&dev->lock);
211 return 0;
212}
213
214static int vidioc_g_frequency(struct file *file, void *priv,
215 struct v4l2_frequency *f)
216{
217 struct maestro *dev = video_drvdata(file);
218
219 if (f->tuner != 0)
220 return -EINVAL;
221 f->type = V4L2_TUNER_RADIO;
222 mutex_lock(&dev->lock);
223 f->frequency = BITS2FREQ(radio_bits_get(dev));
224 mutex_unlock(&dev->lock);
225 return 0;
226}
227
228static int vidioc_queryctrl(struct file *file, void *priv,
229 struct v4l2_queryctrl *qc)
230{
231 switch (qc->id) {
232 case V4L2_CID_AUDIO_MUTE:
233 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
234 }
235 return -EINVAL;
236}
237
238static int vidioc_g_ctrl(struct file *file, void *priv,
239 struct v4l2_control *ctrl)
240{
241 struct maestro *dev = video_drvdata(file);
242
243 switch (ctrl->id) {
244 case V4L2_CID_AUDIO_MUTE:
245 ctrl->value = dev->muted;
246 return 0;
247 }
248 return -EINVAL;
249}
250
251static int vidioc_s_ctrl(struct file *file, void *priv,
252 struct v4l2_control *ctrl)
253{
254 struct maestro *dev = video_drvdata(file);
255 u16 io = dev->io;
256 u16 omask;
257
258 switch (ctrl->id) {
259 case V4L2_CID_AUDIO_MUTE:
260 mutex_lock(&dev->lock);
261 omask = inw(io + IO_MASK);
262 outw(~STR_WREN, io + IO_MASK);
263 dev->muted = ctrl->value;
264 outw(dev->muted ? STR_WREN : 0, io);
265 udelay(4);
266 outw(omask, io + IO_MASK);
267 msleep(125);
268 mutex_unlock(&dev->lock);
269 return 0;
270 }
271 return -EINVAL;
272}
273
274static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
275{
276 *i = 0;
277 return 0;
278}
279
280static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
281{
282 return i ? -EINVAL : 0;
283}
284
285static int vidioc_g_audio(struct file *file, void *priv,
286 struct v4l2_audio *a)
287{
288 a->index = 0;
289 strlcpy(a->name, "Radio", sizeof(a->name));
290 a->capability = V4L2_AUDCAP_STEREO;
291 return 0;
292}
293
294static int vidioc_s_audio(struct file *file, void *priv,
295 struct v4l2_audio *a)
296{
297 return a->index ? -EINVAL : 0;
298}
299
300static const struct v4l2_file_operations maestro_fops = {
301 .owner = THIS_MODULE,
302 .unlocked_ioctl = video_ioctl2,
303};
304
305static const struct v4l2_ioctl_ops maestro_ioctl_ops = {
306 .vidioc_querycap = vidioc_querycap,
307 .vidioc_g_tuner = vidioc_g_tuner,
308 .vidioc_s_tuner = vidioc_s_tuner,
309 .vidioc_g_audio = vidioc_g_audio,
310 .vidioc_s_audio = vidioc_s_audio,
311 .vidioc_g_input = vidioc_g_input,
312 .vidioc_s_input = vidioc_s_input,
313 .vidioc_g_frequency = vidioc_g_frequency,
314 .vidioc_s_frequency = vidioc_s_frequency,
315 .vidioc_queryctrl = vidioc_queryctrl,
316 .vidioc_g_ctrl = vidioc_g_ctrl,
317 .vidioc_s_ctrl = vidioc_s_ctrl,
318};
319
320static u16 __devinit radio_power_on(struct maestro *dev)
321{
322 register u16 io = dev->io;
323 register u32 ofreq;
324 u16 omask, odir;
325
326 omask = inw(io + IO_MASK);
327 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
328 outw(odir & ~STR_WREN, io + IO_DIR);
329 dev->muted = inw(io) & STR_WREN ? 0 : 1;
330 outw(odir, io + IO_DIR);
331 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
332 outw(dev->muted ? 0 : STR_WREN, io);
333 udelay(16);
334 outw(omask, io + IO_MASK);
335 ofreq = radio_bits_get(dev);
336
337 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
338 ofreq = FREQ2BITS(FREQ_LO);
339 radio_bits_set(dev, ofreq);
340
341 return (ofreq == radio_bits_get(dev));
342}
343
344static int __devinit maestro_probe(struct pci_dev *pdev,
345 const struct pci_device_id *ent)
346{
347 struct maestro *dev;
348 struct v4l2_device *v4l2_dev;
349 int retval;
350
351 retval = pci_enable_device(pdev);
352 if (retval) {
353 dev_err(&pdev->dev, "enabling pci device failed!\n");
354 goto err;
355 }
356
357 retval = -ENOMEM;
358
359 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
360 if (dev == NULL) {
361 dev_err(&pdev->dev, "not enough memory\n");
362 goto err;
363 }
364
365 v4l2_dev = &dev->v4l2_dev;
366 mutex_init(&dev->lock);
367 dev->pdev = pdev;
368
369 strlcpy(v4l2_dev->name, "maestro", sizeof(v4l2_dev->name));
370
371 retval = v4l2_device_register(&pdev->dev, v4l2_dev);
372 if (retval < 0) {
373 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
374 goto errfr;
375 }
376
377 dev->io = pci_resource_start(pdev, 0) + GPIO_DATA;
378
379 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
380 dev->vdev.v4l2_dev = v4l2_dev;
381 dev->vdev.fops = &maestro_fops;
382 dev->vdev.ioctl_ops = &maestro_ioctl_ops;
383 dev->vdev.release = video_device_release_empty;
384 video_set_drvdata(&dev->vdev, dev);
385
386 if (!radio_power_on(dev)) {
387 retval = -EIO;
388 goto errfr1;
389 }
390
391 retval = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr);
392 if (retval) {
393 v4l2_err(v4l2_dev, "can't register video device!\n");
394 goto errfr1;
395 }
396
397 v4l2_info(v4l2_dev, "version " DRIVER_VERSION "\n");
398
399 return 0;
400errfr1:
401 v4l2_device_unregister(v4l2_dev);
402errfr:
403 kfree(dev);
404err:
405 return retval;
406
407}
408
409static void __devexit maestro_remove(struct pci_dev *pdev)
410{
411 struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
412 struct maestro *dev = to_maestro(v4l2_dev);
413
414 video_unregister_device(&dev->vdev);
415 v4l2_device_unregister(&dev->v4l2_dev);
416}
417
418static struct pci_device_id maestro_r_pci_tbl[] = {
419 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
420 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
421 .class_mask = 0xffff00 },
422 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
423 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
424 .class_mask = 0xffff00 },
425 { 0 }
426};
427MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
428
429static struct pci_driver maestro_r_driver = {
430 .name = "maestro_radio",
431 .id_table = maestro_r_pci_tbl,
432 .probe = maestro_probe,
433 .remove = __devexit_p(maestro_remove),
434};
435
436static int __init maestro_radio_init(void)
437{
438 int retval = pci_register_driver(&maestro_r_driver);
439
440 if (retval)
441 printk(KERN_ERR "error during registration pci driver\n");
442
443 return retval;
444}
445
446static void __exit maestro_radio_exit(void)
447{
448 pci_unregister_driver(&maestro_r_driver);
449}
450
451module_init(maestro_radio_init);
452module_exit(maestro_radio_exit);
453
