Commit | Line | Data |
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137c579c HV |
1 | /* |
2 | * Framework for ISA radio drivers. | |
3 | * This takes care of all the V4L2 scaffolding, allowing the ISA drivers | |
4 | * to concentrate on the actual hardware operation. | |
5 | * | |
6 | * Copyright (C) 2012 Hans Verkuil <hans.verkuil@cisco.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
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> | |
9f1dfccf | 29 | #include <linux/slab.h> |
137c579c HV |
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 | ||
38 | MODULE_AUTHOR("Hans Verkuil"); | |
39 | MODULE_DESCRIPTION("A framework for ISA radio drivers."); | |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
42 | #define FREQ_LOW (87U * 16000U) | |
43 | #define FREQ_HIGH (108U * 16000U) | |
44 | ||
45 | static 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 | ||
8b21eb17 HV |
54 | v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
55 | v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; | |
137c579c HV |
56 | return 0; |
57 | } | |
58 | ||
59 | static 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 | ||
89 | static int radio_isa_s_tuner(struct file *file, void *priv, | |
2f73c7c5 | 90 | const struct v4l2_tuner *v) |
137c579c HV |
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 | ||
104 | static int radio_isa_s_frequency(struct file *file, void *priv, | |
b530a447 | 105 | const struct v4l2_frequency *f) |
137c579c HV |
106 | { |
107 | struct radio_isa_card *isa = video_drvdata(file); | |
b530a447 | 108 | u32 freq = f->frequency; |
137c579c HV |
109 | int res; |
110 | ||
111 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) | |
112 | return -EINVAL; | |
b530a447 HV |
113 | freq = clamp(freq, FREQ_LOW, FREQ_HIGH); |
114 | res = isa->drv->ops->s_frequency(isa, freq); | |
137c579c | 115 | if (res == 0) |
b530a447 | 116 | isa->freq = freq; |
137c579c HV |
117 | return res; |
118 | } | |
119 | ||
120 | static 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 | ||
132 | static 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 | ||
145 | static 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 | ||
137c579c HV |
154 | static const struct v4l2_ctrl_ops radio_isa_ctrl_ops = { |
155 | .s_ctrl = radio_isa_s_ctrl, | |
156 | }; | |
157 | ||
158 | static 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 | ||
166 | static 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, | |
a22d85fe | 173 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
137c579c HV |
174 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
175 | }; | |
176 | ||
177 | int 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 | } | |
183 | EXPORT_SYMBOL_GPL(radio_isa_match); | |
184 | ||
185 | static 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 | ||
4b644dcc | 195 | static struct radio_isa_card *radio_isa_alloc(struct radio_isa_driver *drv, |
865d7ec9 | 196 | struct device *pdev) |
137c579c | 197 | { |
137c579c | 198 | struct v4l2_device *v4l2_dev; |
865d7ec9 OZ |
199 | struct radio_isa_card *isa = drv->ops->alloc(); |
200 | if (!isa) | |
201 | return NULL; | |
137c579c | 202 | |
137c579c HV |
203 | dev_set_drvdata(pdev, isa); |
204 | isa->drv = drv; | |
137c579c HV |
205 | v4l2_dev = &isa->v4l2_dev; |
206 | strlcpy(v4l2_dev->name, dev_name(pdev), sizeof(v4l2_dev->name)); | |
207 | ||
865d7ec9 OZ |
208 | return isa; |
209 | } | |
137c579c | 210 | |
4b644dcc MCC |
211 | static int radio_isa_common_probe(struct radio_isa_card *isa, |
212 | struct device *pdev, | |
213 | int radio_nr, unsigned region_size) | |
865d7ec9 OZ |
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; | |
137c579c | 219 | |
865d7ec9 | 220 | if (!request_region(isa->io, region_size, v4l2_dev->name)) { |
137c579c HV |
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; | |
137c579c HV |
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"); | |
f61861fa | 270 | goto err_hdl; |
137c579c | 271 | } |
865d7ec9 OZ |
272 | res = video_register_device(&isa->vdev, VFL_TYPE_RADIO, radio_nr); |
273 | ||
137c579c HV |
274 | if (res < 0) { |
275 | v4l2_err(v4l2_dev, "Could not register device node\n"); | |
f61861fa | 276 | goto err_hdl; |
137c579c HV |
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 | ||
137c579c | 283 | err_hdl: |
f61861fa | 284 | v4l2_ctrl_handler_free(&isa->hdl); |
137c579c | 285 | err_dev_reg: |
865d7ec9 | 286 | release_region(isa->io, region_size); |
137c579c HV |
287 | kfree(isa); |
288 | return res; | |
289 | } | |
137c579c | 290 | |
4b644dcc MCC |
291 | static int radio_isa_common_remove(struct radio_isa_card *isa, |
292 | unsigned region_size) | |
137c579c | 293 | { |
137c579c HV |
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); | |
865d7ec9 | 300 | release_region(isa->io, region_size); |
137c579c HV |
301 | v4l2_info(&isa->v4l2_dev, "Removed radio card %s\n", isa->drv->card); |
302 | kfree(isa); | |
303 | return 0; | |
304 | } | |
865d7ec9 OZ |
305 | |
306 | int 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 | } | |
354 | EXPORT_SYMBOL_GPL(radio_isa_probe); | |
355 | ||
356 | int 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 | } | |
137c579c | 362 | EXPORT_SYMBOL_GPL(radio_isa_remove); |
865d7ec9 OZ |
363 | |
364 | #ifdef CONFIG_PNP | |
365 | int 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 | } | |
384 | EXPORT_SYMBOL_GPL(radio_isa_pnp_probe); | |
385 | ||
386 | void 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 | } | |
392 | EXPORT_SYMBOL_GPL(radio_isa_pnp_remove); | |
393 | #endif |