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 | ||
54 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; | |
55 | v->device_caps = v->capabilities | V4L2_CAP_DEVICE_CAPS; | |
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, | |
90 | 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 | ||
104 | static int radio_isa_s_frequency(struct file *file, void *priv, | |
105 | struct v4l2_frequency *f) | |
106 | { | |
107 | struct radio_isa_card *isa = video_drvdata(file); | |
108 | int res; | |
109 | ||
110 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) | |
111 | return -EINVAL; | |
112 | f->frequency = clamp(f->frequency, FREQ_LOW, FREQ_HIGH); | |
113 | res = isa->drv->ops->s_frequency(isa, f->frequency); | |
114 | if (res == 0) | |
115 | isa->freq = f->frequency; | |
116 | return res; | |
117 | } | |
118 | ||
119 | static int radio_isa_g_frequency(struct file *file, void *priv, | |
120 | struct v4l2_frequency *f) | |
121 | { | |
122 | struct radio_isa_card *isa = video_drvdata(file); | |
123 | ||
124 | if (f->tuner != 0) | |
125 | return -EINVAL; | |
126 | f->type = V4L2_TUNER_RADIO; | |
127 | f->frequency = isa->freq; | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static int radio_isa_s_ctrl(struct v4l2_ctrl *ctrl) | |
132 | { | |
133 | struct radio_isa_card *isa = | |
134 | container_of(ctrl->handler, struct radio_isa_card, hdl); | |
135 | ||
136 | switch (ctrl->id) { | |
137 | case V4L2_CID_AUDIO_MUTE: | |
138 | return isa->drv->ops->s_mute_volume(isa, ctrl->val, | |
139 | isa->volume ? isa->volume->val : 0); | |
140 | } | |
141 | return -EINVAL; | |
142 | } | |
143 | ||
144 | static int radio_isa_log_status(struct file *file, void *priv) | |
145 | { | |
146 | struct radio_isa_card *isa = video_drvdata(file); | |
147 | ||
148 | v4l2_info(&isa->v4l2_dev, "I/O Port = 0x%03x\n", isa->io); | |
149 | v4l2_ctrl_handler_log_status(&isa->hdl, isa->v4l2_dev.name); | |
150 | return 0; | |
151 | } | |
152 | ||
137c579c HV |
153 | static const struct v4l2_ctrl_ops radio_isa_ctrl_ops = { |
154 | .s_ctrl = radio_isa_s_ctrl, | |
155 | }; | |
156 | ||
157 | static const struct v4l2_file_operations radio_isa_fops = { | |
158 | .owner = THIS_MODULE, | |
159 | .open = v4l2_fh_open, | |
160 | .release = v4l2_fh_release, | |
161 | .poll = v4l2_ctrl_poll, | |
162 | .unlocked_ioctl = video_ioctl2, | |
163 | }; | |
164 | ||
165 | static const struct v4l2_ioctl_ops radio_isa_ioctl_ops = { | |
166 | .vidioc_querycap = radio_isa_querycap, | |
167 | .vidioc_g_tuner = radio_isa_g_tuner, | |
168 | .vidioc_s_tuner = radio_isa_s_tuner, | |
169 | .vidioc_g_frequency = radio_isa_g_frequency, | |
170 | .vidioc_s_frequency = radio_isa_s_frequency, | |
171 | .vidioc_log_status = radio_isa_log_status, | |
a22d85fe | 172 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
137c579c HV |
173 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
174 | }; | |
175 | ||
176 | int radio_isa_match(struct device *pdev, unsigned int dev) | |
177 | { | |
178 | struct radio_isa_driver *drv = pdev->platform_data; | |
179 | ||
180 | return drv->probe || drv->io_params[dev] >= 0; | |
181 | } | |
182 | EXPORT_SYMBOL_GPL(radio_isa_match); | |
183 | ||
184 | static bool radio_isa_valid_io(const struct radio_isa_driver *drv, int io) | |
185 | { | |
186 | int i; | |
187 | ||
188 | for (i = 0; i < drv->num_of_io_ports; i++) | |
189 | if (drv->io_ports[i] == io) | |
190 | return true; | |
191 | return false; | |
192 | } | |
193 | ||
865d7ec9 OZ |
194 | struct radio_isa_card *radio_isa_alloc(struct radio_isa_driver *drv, |
195 | struct device *pdev) | |
137c579c | 196 | { |
137c579c | 197 | struct v4l2_device *v4l2_dev; |
865d7ec9 OZ |
198 | struct radio_isa_card *isa = drv->ops->alloc(); |
199 | if (!isa) | |
200 | return NULL; | |
137c579c | 201 | |
137c579c HV |
202 | dev_set_drvdata(pdev, isa); |
203 | isa->drv = drv; | |
137c579c HV |
204 | v4l2_dev = &isa->v4l2_dev; |
205 | strlcpy(v4l2_dev->name, dev_name(pdev), sizeof(v4l2_dev->name)); | |
206 | ||
865d7ec9 OZ |
207 | return isa; |
208 | } | |
137c579c | 209 | |
865d7ec9 OZ |
210 | int radio_isa_common_probe(struct radio_isa_card *isa, struct device *pdev, |
211 | int radio_nr, unsigned region_size) | |
212 | { | |
213 | const struct radio_isa_driver *drv = isa->drv; | |
214 | const struct radio_isa_ops *ops = drv->ops; | |
215 | struct v4l2_device *v4l2_dev = &isa->v4l2_dev; | |
216 | int res; | |
137c579c | 217 | |
865d7ec9 | 218 | if (!request_region(isa->io, region_size, v4l2_dev->name)) { |
137c579c HV |
219 | v4l2_err(v4l2_dev, "port 0x%x already in use\n", isa->io); |
220 | kfree(isa); | |
221 | return -EBUSY; | |
222 | } | |
223 | ||
224 | res = v4l2_device_register(pdev, v4l2_dev); | |
225 | if (res < 0) { | |
226 | v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); | |
227 | goto err_dev_reg; | |
228 | } | |
229 | ||
230 | v4l2_ctrl_handler_init(&isa->hdl, 1); | |
231 | isa->mute = v4l2_ctrl_new_std(&isa->hdl, &radio_isa_ctrl_ops, | |
232 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); | |
233 | if (drv->max_volume) | |
234 | isa->volume = v4l2_ctrl_new_std(&isa->hdl, &radio_isa_ctrl_ops, | |
235 | V4L2_CID_AUDIO_VOLUME, 0, drv->max_volume, 1, | |
236 | drv->max_volume); | |
237 | v4l2_dev->ctrl_handler = &isa->hdl; | |
238 | if (isa->hdl.error) { | |
239 | res = isa->hdl.error; | |
240 | v4l2_err(v4l2_dev, "Could not register controls\n"); | |
241 | goto err_hdl; | |
242 | } | |
243 | if (drv->max_volume) | |
244 | v4l2_ctrl_cluster(2, &isa->mute); | |
245 | v4l2_dev->ctrl_handler = &isa->hdl; | |
246 | ||
247 | mutex_init(&isa->lock); | |
248 | isa->vdev.lock = &isa->lock; | |
249 | strlcpy(isa->vdev.name, v4l2_dev->name, sizeof(isa->vdev.name)); | |
250 | isa->vdev.v4l2_dev = v4l2_dev; | |
251 | isa->vdev.fops = &radio_isa_fops; | |
252 | isa->vdev.ioctl_ops = &radio_isa_ioctl_ops; | |
253 | isa->vdev.release = video_device_release_empty; | |
254 | set_bit(V4L2_FL_USE_FH_PRIO, &isa->vdev.flags); | |
255 | video_set_drvdata(&isa->vdev, isa); | |
256 | isa->freq = FREQ_LOW; | |
257 | isa->stereo = drv->has_stereo; | |
258 | ||
259 | if (ops->init) | |
260 | res = ops->init(isa); | |
261 | if (!res) | |
262 | res = v4l2_ctrl_handler_setup(&isa->hdl); | |
263 | if (!res) | |
264 | res = ops->s_frequency(isa, isa->freq); | |
265 | if (!res && ops->s_stereo) | |
266 | res = ops->s_stereo(isa, isa->stereo); | |
267 | if (res < 0) { | |
268 | v4l2_err(v4l2_dev, "Could not setup card\n"); | |
f61861fa | 269 | goto err_hdl; |
137c579c | 270 | } |
865d7ec9 OZ |
271 | res = video_register_device(&isa->vdev, VFL_TYPE_RADIO, radio_nr); |
272 | ||
137c579c HV |
273 | if (res < 0) { |
274 | v4l2_err(v4l2_dev, "Could not register device node\n"); | |
f61861fa | 275 | goto err_hdl; |
137c579c HV |
276 | } |
277 | ||
278 | v4l2_info(v4l2_dev, "Initialized radio card %s on port 0x%03x\n", | |
279 | drv->card, isa->io); | |
280 | return 0; | |
281 | ||
137c579c | 282 | err_hdl: |
f61861fa | 283 | v4l2_ctrl_handler_free(&isa->hdl); |
137c579c | 284 | err_dev_reg: |
865d7ec9 | 285 | release_region(isa->io, region_size); |
137c579c HV |
286 | kfree(isa); |
287 | return res; | |
288 | } | |
137c579c | 289 | |
865d7ec9 | 290 | int radio_isa_common_remove(struct radio_isa_card *isa, unsigned region_size) |
137c579c | 291 | { |
137c579c HV |
292 | const struct radio_isa_ops *ops = isa->drv->ops; |
293 | ||
294 | ops->s_mute_volume(isa, true, isa->volume ? isa->volume->cur.val : 0); | |
295 | video_unregister_device(&isa->vdev); | |
296 | v4l2_ctrl_handler_free(&isa->hdl); | |
297 | v4l2_device_unregister(&isa->v4l2_dev); | |
865d7ec9 | 298 | release_region(isa->io, region_size); |
137c579c HV |
299 | v4l2_info(&isa->v4l2_dev, "Removed radio card %s\n", isa->drv->card); |
300 | kfree(isa); | |
301 | return 0; | |
302 | } | |
865d7ec9 OZ |
303 | |
304 | int radio_isa_probe(struct device *pdev, unsigned int dev) | |
305 | { | |
306 | struct radio_isa_driver *drv = pdev->platform_data; | |
307 | const struct radio_isa_ops *ops = drv->ops; | |
308 | struct v4l2_device *v4l2_dev; | |
309 | struct radio_isa_card *isa; | |
310 | ||
311 | isa = radio_isa_alloc(drv, pdev); | |
312 | if (!isa) | |
313 | return -ENOMEM; | |
314 | isa->io = drv->io_params[dev]; | |
315 | v4l2_dev = &isa->v4l2_dev; | |
316 | ||
317 | if (drv->probe && ops->probe) { | |
318 | int i; | |
319 | ||
320 | for (i = 0; i < drv->num_of_io_ports; ++i) { | |
321 | int io = drv->io_ports[i]; | |
322 | ||
323 | if (request_region(io, drv->region_size, v4l2_dev->name)) { | |
324 | bool found = ops->probe(isa, io); | |
325 | ||
326 | release_region(io, drv->region_size); | |
327 | if (found) { | |
328 | isa->io = io; | |
329 | break; | |
330 | } | |
331 | } | |
332 | } | |
333 | } | |
334 | ||
335 | if (!radio_isa_valid_io(drv, isa->io)) { | |
336 | int i; | |
337 | ||
338 | if (isa->io < 0) | |
339 | return -ENODEV; | |
340 | v4l2_err(v4l2_dev, "you must set an I/O address with io=0x%03x", | |
341 | drv->io_ports[0]); | |
342 | for (i = 1; i < drv->num_of_io_ports; i++) | |
343 | printk(KERN_CONT "/0x%03x", drv->io_ports[i]); | |
344 | printk(KERN_CONT ".\n"); | |
345 | kfree(isa); | |
346 | return -EINVAL; | |
347 | } | |
348 | ||
349 | return radio_isa_common_probe(isa, pdev, drv->radio_nr_params[dev], | |
350 | drv->region_size); | |
351 | } | |
352 | EXPORT_SYMBOL_GPL(radio_isa_probe); | |
353 | ||
354 | int radio_isa_remove(struct device *pdev, unsigned int dev) | |
355 | { | |
356 | struct radio_isa_card *isa = dev_get_drvdata(pdev); | |
357 | ||
358 | return radio_isa_common_remove(isa, isa->drv->region_size); | |
359 | } | |
137c579c | 360 | EXPORT_SYMBOL_GPL(radio_isa_remove); |
865d7ec9 OZ |
361 | |
362 | #ifdef CONFIG_PNP | |
363 | int radio_isa_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) | |
364 | { | |
365 | struct pnp_driver *pnp_drv = to_pnp_driver(dev->dev.driver); | |
366 | struct radio_isa_driver *drv = container_of(pnp_drv, | |
367 | struct radio_isa_driver, pnp_driver); | |
368 | struct radio_isa_card *isa; | |
369 | ||
370 | if (!pnp_port_valid(dev, 0)) | |
371 | return -ENODEV; | |
372 | ||
373 | isa = radio_isa_alloc(drv, &dev->dev); | |
374 | if (!isa) | |
375 | return -ENOMEM; | |
376 | ||
377 | isa->io = pnp_port_start(dev, 0); | |
378 | ||
379 | return radio_isa_common_probe(isa, &dev->dev, drv->radio_nr_params[0], | |
380 | pnp_port_len(dev, 0)); | |
381 | } | |
382 | EXPORT_SYMBOL_GPL(radio_isa_pnp_probe); | |
383 | ||
384 | void radio_isa_pnp_remove(struct pnp_dev *dev) | |
385 | { | |
386 | struct radio_isa_card *isa = dev_get_drvdata(&dev->dev); | |
387 | ||
388 | radio_isa_common_remove(isa, pnp_port_len(dev, 0)); | |
389 | } | |
390 | EXPORT_SYMBOL_GPL(radio_isa_pnp_remove); | |
391 | #endif |