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23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/ioport.h>
26#include <linux/delay.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#include <media/v4l2-fh.h>
33#include <media/v4l2-ctrls.h>
34#include <media/v4l2-event.h>
35
36#include "radio-isa.h"
37
38MODULE_AUTHOR("Hans Verkuil");
39MODULE_DESCRIPTION("A framework for ISA radio drivers.");
40MODULE_LICENSE("GPL");
41
42#define FREQ_LOW (87U * 16000U)
43#define FREQ_HIGH (108U * 16000U)
44
45static int radio_isa_querycap(struct file *file, void *priv,
46 struct v4l2_capability *v)
47{
48 struct radio_isa_card *isa = video_drvdata(file);
49
50 strlcpy(v->driver, isa->drv->driver.driver.name, sizeof(v->driver));
51 strlcpy(v->card, isa->drv->card, sizeof(v->card));
52 snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", isa->v4l2_dev.name);
53
54 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
55 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
56 return 0;
57}
58
59static int radio_isa_g_tuner(struct file *file, void *priv,
60 struct v4l2_tuner *v)
61{
62 struct radio_isa_card *isa = video_drvdata(file);
63 const struct radio_isa_ops *ops = isa->drv->ops;
64
65 if (v->index > 0)
66 return -EINVAL;
67
68 strlcpy(v->name, "FM", sizeof(v->name));
69 v->type = V4L2_TUNER_RADIO;
70 v->rangelow = FREQ_LOW;
71 v->rangehigh = FREQ_HIGH;
72 v->capability = V4L2_TUNER_CAP_LOW;
73 if (isa->drv->has_stereo)
74 v->capability |= V4L2_TUNER_CAP_STEREO;
75
76 if (ops->g_rxsubchans)
77 v->rxsubchans = ops->g_rxsubchans(isa);
78 else
79 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
80 v->audmode = isa->stereo ? V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
81 if (ops->g_signal)
82 v->signal = ops->g_signal(isa);
83 else
84 v->signal = (v->rxsubchans & V4L2_TUNER_SUB_STEREO) ?
85 0xffff : 0;
86 return 0;
87}
88
89static int radio_isa_s_tuner(struct file *file, void *priv,
90 const struct v4l2_tuner *v)
91{
92 struct radio_isa_card *isa = video_drvdata(file);
93 const struct radio_isa_ops *ops = isa->drv->ops;
94
95 if (v->index)
96 return -EINVAL;
97 if (ops->s_stereo) {
98 isa->stereo = (v->audmode == V4L2_TUNER_MODE_STEREO);
99 return ops->s_stereo(isa, isa->stereo);
100 }
101 return 0;
102}
103
104static int radio_isa_s_frequency(struct file *file, void *priv,
105 const struct v4l2_frequency *f)
106{
107 struct radio_isa_card *isa = video_drvdata(file);
108 u32 freq = f->frequency;
109 int res;
110
111 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
112 return -EINVAL;
113 freq = clamp(freq, FREQ_LOW, FREQ_HIGH);
114 res = isa->drv->ops->s_frequency(isa, freq);
115 if (res == 0)
116 isa->freq = freq;
117 return res;
118}
119
120static int radio_isa_g_frequency(struct file *file, void *priv,
121 struct v4l2_frequency *f)
122{
123 struct radio_isa_card *isa = video_drvdata(file);
124
125 if (f->tuner != 0)
126 return -EINVAL;
127 f->type = V4L2_TUNER_RADIO;
128 f->frequency = isa->freq;
129 return 0;
130}
131
132static int radio_isa_s_ctrl(struct v4l2_ctrl *ctrl)
133{
134 struct radio_isa_card *isa =
135 container_of(ctrl->handler, struct radio_isa_card, hdl);
136
137 switch (ctrl->id) {
138 case V4L2_CID_AUDIO_MUTE:
139 return isa->drv->ops->s_mute_volume(isa, ctrl->val,
140 isa->volume ? isa->volume->val : 0);
141 }
142 return -EINVAL;
143}
144
145static int radio_isa_log_status(struct file *file, void *priv)
146{
147 struct radio_isa_card *isa = video_drvdata(file);
148
149 v4l2_info(&isa->v4l2_dev, "I/O Port = 0x%03x\n", isa->io);
150 v4l2_ctrl_handler_log_status(&isa->hdl, isa->v4l2_dev.name);
151 return 0;
152}
153
154static const struct v4l2_ctrl_ops radio_isa_ctrl_ops = {
155 .s_ctrl = radio_isa_s_ctrl,
156};
157
158static const struct v4l2_file_operations radio_isa_fops = {
159 .owner = THIS_MODULE,
160 .open = v4l2_fh_open,
161 .release = v4l2_fh_release,
162 .poll = v4l2_ctrl_poll,
163 .unlocked_ioctl = video_ioctl2,
164};
165
166static const struct v4l2_ioctl_ops radio_isa_ioctl_ops = {
167 .vidioc_querycap = radio_isa_querycap,
168 .vidioc_g_tuner = radio_isa_g_tuner,
169 .vidioc_s_tuner = radio_isa_s_tuner,
170 .vidioc_g_frequency = radio_isa_g_frequency,
171 .vidioc_s_frequency = radio_isa_s_frequency,
172 .vidioc_log_status = radio_isa_log_status,
173 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
174 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
175};
176
177int radio_isa_match(struct device *pdev, unsigned int dev)
178{
179 struct radio_isa_driver *drv = pdev->platform_data;
180
181 return drv->probe || drv->io_params[dev] >= 0;
182}
183EXPORT_SYMBOL_GPL(radio_isa_match);
184
185static bool radio_isa_valid_io(const struct radio_isa_driver *drv, int io)
186{
187 int i;
188
189 for (i = 0; i < drv->num_of_io_ports; i++)
190 if (drv->io_ports[i] == io)
191 return true;
192 return false;
193}
194
195static struct radio_isa_card *radio_isa_alloc(struct radio_isa_driver *drv,
196 struct device *pdev)
197{
198 struct v4l2_device *v4l2_dev;
199 struct radio_isa_card *isa = drv->ops->alloc();
200 if (!isa)
201 return NULL;
202
203 dev_set_drvdata(pdev, isa);
204 isa->drv = drv;
205 v4l2_dev = &isa->v4l2_dev;
206 strlcpy(v4l2_dev->name, dev_name(pdev), sizeof(v4l2_dev->name));
207
208 return isa;
209}
210
211static int radio_isa_common_probe(struct radio_isa_card *isa,
212 struct device *pdev,
213 int radio_nr, unsigned region_size)
214{
215 const struct radio_isa_driver *drv = isa->drv;
216 const struct radio_isa_ops *ops = drv->ops;
217 struct v4l2_device *v4l2_dev = &isa->v4l2_dev;
218 int res;
219
220 if (!request_region(isa->io, region_size, v4l2_dev->name)) {
221 v4l2_err(v4l2_dev, "port 0x%x already in use\n", isa->io);
222 kfree(isa);
223 return -EBUSY;
224 }
225
226 res = v4l2_device_register(pdev, v4l2_dev);
227 if (res < 0) {
228 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
229 goto err_dev_reg;
230 }
231
232 v4l2_ctrl_handler_init(&isa->hdl, 1);
233 isa->mute = v4l2_ctrl_new_std(&isa->hdl, &radio_isa_ctrl_ops,
234 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
235 if (drv->max_volume)
236 isa->volume = v4l2_ctrl_new_std(&isa->hdl, &radio_isa_ctrl_ops,
237 V4L2_CID_AUDIO_VOLUME, 0, drv->max_volume, 1,
238 drv->max_volume);
239 v4l2_dev->ctrl_handler = &isa->hdl;
240 if (isa->hdl.error) {
241 res = isa->hdl.error;
242 v4l2_err(v4l2_dev, "Could not register controls\n");
243 goto err_hdl;
244 }
245 if (drv->max_volume)
246 v4l2_ctrl_cluster(2, &isa->mute);
247 v4l2_dev->ctrl_handler = &isa->hdl;
248
249 mutex_init(&isa->lock);
250 isa->vdev.lock = &isa->lock;
251 strlcpy(isa->vdev.name, v4l2_dev->name, sizeof(isa->vdev.name));
252 isa->vdev.v4l2_dev = v4l2_dev;
253 isa->vdev.fops = &radio_isa_fops;
254 isa->vdev.ioctl_ops = &radio_isa_ioctl_ops;
255 isa->vdev.release = video_device_release_empty;
256 video_set_drvdata(&isa->vdev, isa);
257 isa->freq = FREQ_LOW;
258 isa->stereo = drv->has_stereo;
259
260 if (ops->init)
261 res = ops->init(isa);
262 if (!res)
263 res = v4l2_ctrl_handler_setup(&isa->hdl);
264 if (!res)
265 res = ops->s_frequency(isa, isa->freq);
266 if (!res && ops->s_stereo)
267 res = ops->s_stereo(isa, isa->stereo);
268 if (res < 0) {
269 v4l2_err(v4l2_dev, "Could not setup card\n");
270 goto err_hdl;
271 }
272 res = video_register_device(&isa->vdev, VFL_TYPE_RADIO, radio_nr);
273
274 if (res < 0) {
275 v4l2_err(v4l2_dev, "Could not register device node\n");
276 goto err_hdl;
277 }
278
279 v4l2_info(v4l2_dev, "Initialized radio card %s on port 0x%03x\n",
280 drv->card, isa->io);
281 return 0;
282
283err_hdl:
284 v4l2_ctrl_handler_free(&isa->hdl);
285err_dev_reg:
286 release_region(isa->io, region_size);
287 kfree(isa);
288 return res;
289}
290
291static int radio_isa_common_remove(struct radio_isa_card *isa,
292 unsigned region_size)
293{
294 const struct radio_isa_ops *ops = isa->drv->ops;
295
296 ops->s_mute_volume(isa, true, isa->volume ? isa->volume->cur.val : 0);
297 video_unregister_device(&isa->vdev);
298 v4l2_ctrl_handler_free(&isa->hdl);
299 v4l2_device_unregister(&isa->v4l2_dev);
300 release_region(isa->io, region_size);
301 v4l2_info(&isa->v4l2_dev, "Removed radio card %s\n", isa->drv->card);
302 kfree(isa);
303 return 0;
304}
305
306int radio_isa_probe(struct device *pdev, unsigned int dev)
307{
308 struct radio_isa_driver *drv = pdev->platform_data;
309 const struct radio_isa_ops *ops = drv->ops;
310 struct v4l2_device *v4l2_dev;
311 struct radio_isa_card *isa;
312
313 isa = radio_isa_alloc(drv, pdev);
314 if (!isa)
315 return -ENOMEM;
316 isa->io = drv->io_params[dev];
317 v4l2_dev = &isa->v4l2_dev;
318
319 if (drv->probe && ops->probe) {
320 int i;
321
322 for (i = 0; i < drv->num_of_io_ports; ++i) {
323 int io = drv->io_ports[i];
324
325 if (request_region(io, drv->region_size, v4l2_dev->name)) {
326 bool found = ops->probe(isa, io);
327
328 release_region(io, drv->region_size);
329 if (found) {
330 isa->io = io;
331 break;
332 }
333 }
334 }
335 }
336
337 if (!radio_isa_valid_io(drv, isa->io)) {
338 int i;
339
340 if (isa->io < 0)
341 return -ENODEV;
342 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x%03x",
343 drv->io_ports[0]);
344 for (i = 1; i < drv->num_of_io_ports; i++)
345 printk(KERN_CONT "/0x%03x", drv->io_ports[i]);
346 printk(KERN_CONT ".\n");
347 kfree(isa);
348 return -EINVAL;
349 }
350
351 return radio_isa_common_probe(isa, pdev, drv->radio_nr_params[dev],
352 drv->region_size);
353}
354EXPORT_SYMBOL_GPL(radio_isa_probe);
355
356int radio_isa_remove(struct device *pdev, unsigned int dev)
357{
358 struct radio_isa_card *isa = dev_get_drvdata(pdev);
359
360 return radio_isa_common_remove(isa, isa->drv->region_size);
361}
362EXPORT_SYMBOL_GPL(radio_isa_remove);
363
364#ifdef CONFIG_PNP
365int radio_isa_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
366{
367 struct pnp_driver *pnp_drv = to_pnp_driver(dev->dev.driver);
368 struct radio_isa_driver *drv = container_of(pnp_drv,
369 struct radio_isa_driver, pnp_driver);
370 struct radio_isa_card *isa;
371
372 if (!pnp_port_valid(dev, 0))
373 return -ENODEV;
374
375 isa = radio_isa_alloc(drv, &dev->dev);
376 if (!isa)
377 return -ENOMEM;
378
379 isa->io = pnp_port_start(dev, 0);
380
381 return radio_isa_common_probe(isa, &dev->dev, drv->radio_nr_params[0],
382 pnp_port_len(dev, 0));
383}
384EXPORT_SYMBOL_GPL(radio_isa_pnp_probe);
385
386void radio_isa_pnp_remove(struct pnp_dev *dev)
387{
388 struct radio_isa_card *isa = dev_get_drvdata(&dev->dev);
389
390 radio_isa_common_remove(isa, pnp_port_len(dev, 0));
391}
392EXPORT_SYMBOL_GPL(radio_isa_pnp_remove);
393#endif
394
