Commit | Line | Data |
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b2f0648f HV |
1 | /* |
2 | v4l2 common internal API header | |
3 | ||
4 | This header contains internal shared ioctl definitions for use by the | |
5 | internal low-level v4l2 drivers. | |
6 | Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal | |
7 | define, | |
8 | ||
9 | Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | */ | |
25 | ||
26 | #ifndef V4L2_COMMON_H_ | |
27 | #define V4L2_COMMON_H_ | |
28 | ||
401998fa MCC |
29 | #include <media/v4l2-dev.h> |
30 | ||
76a59fe7 | 31 | /* Common printk constructs for v4l-i2c drivers. These macros create a unique |
7e8b09ea HV |
32 | prefix consisting of the driver name, the adapter number and the i2c |
33 | address. */ | |
34 | #define v4l_printk(level, name, adapter, addr, fmt, arg...) \ | |
35 | printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg) | |
36 | ||
cab462f7 | 37 | #define v4l_client_printk(level, client, fmt, arg...) \ |
f9d32f25 | 38 | v4l_printk(level, (client)->dev.driver->name, (client)->adapter, \ |
7e8b09ea HV |
39 | (client)->addr, fmt , ## arg) |
40 | ||
41 | #define v4l_err(client, fmt, arg...) \ | |
42 | v4l_client_printk(KERN_ERR, client, fmt , ## arg) | |
43 | ||
44 | #define v4l_warn(client, fmt, arg...) \ | |
45 | v4l_client_printk(KERN_WARNING, client, fmt , ## arg) | |
46 | ||
47 | #define v4l_info(client, fmt, arg...) \ | |
48 | v4l_client_printk(KERN_INFO, client, fmt , ## arg) | |
49 | ||
50 | /* These three macros assume that the debug level is set with a module | |
51 | parameter called 'debug'. */ | |
f167cb4e | 52 | #define v4l_dbg(level, debug, client, fmt, arg...) \ |
6e6a8b5a | 53 | do { \ |
7e8b09ea HV |
54 | if (debug >= (level)) \ |
55 | v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \ | |
56 | } while (0) | |
57 | ||
a41231d5 MCC |
58 | /* Add a version of v4l_dbg to be used on drivers using dev_foo() macros */ |
59 | #define dev_dbg_lvl(__dev, __level, __debug, __fmt, __arg...) \ | |
60 | do { \ | |
61 | if (__debug >= (__level)) \ | |
62 | dev_printk(KERN_DEBUG, __dev, __fmt, ##__arg); \ | |
63 | } while (0) | |
64 | ||
7e8b09ea HV |
65 | /* ------------------------------------------------------------------------- */ |
66 | ||
dd99120c HV |
67 | /* These printk constructs can be used with v4l2_device and v4l2_subdev */ |
68 | #define v4l2_printk(level, dev, fmt, arg...) \ | |
69 | printk(level "%s: " fmt, (dev)->name , ## arg) | |
70 | ||
71 | #define v4l2_err(dev, fmt, arg...) \ | |
72 | v4l2_printk(KERN_ERR, dev, fmt , ## arg) | |
73 | ||
74 | #define v4l2_warn(dev, fmt, arg...) \ | |
75 | v4l2_printk(KERN_WARNING, dev, fmt , ## arg) | |
76 | ||
77 | #define v4l2_info(dev, fmt, arg...) \ | |
78 | v4l2_printk(KERN_INFO, dev, fmt , ## arg) | |
79 | ||
80 | /* These three macros assume that the debug level is set with a module | |
81 | parameter called 'debug'. */ | |
82 | #define v4l2_dbg(level, debug, dev, fmt, arg...) \ | |
6e6a8b5a | 83 | do { \ |
dd99120c | 84 | if (debug >= (level)) \ |
6e6a8b5a | 85 | v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \ |
dd99120c HV |
86 | } while (0) |
87 | ||
b8719158 MCC |
88 | /** |
89 | * v4l2_ctrl_query_fill- Fill in a struct v4l2_queryctrl | |
90 | * | |
91 | * @qctrl: pointer to the &struct v4l2_queryctrl to be filled | |
92 | * @min: minimum value for the control | |
93 | * @max: maximum value for the control | |
94 | * @step: control step | |
95 | * @def: default value for the control | |
96 | * | |
97 | * Fills the &struct v4l2_queryctrl fields for the query control. | |
98 | * | |
99 | * .. note:: | |
100 | * | |
101 | * This function assumes that the @qctrl->id field is filled. | |
102 | * | |
103 | * Returns -EINVAL if the control is not known by the V4L2 core, 0 on success. | |
104 | */ | |
dd99120c | 105 | |
b8719158 MCC |
106 | int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, |
107 | s32 min, s32 max, s32 step, s32 def); | |
9cb2318b HV |
108 | |
109 | /* ------------------------------------------------------------------------- */ | |
110 | ||
78a3b4db | 111 | /* I2C Helper functions */ |
8ffbc655 HV |
112 | |
113 | struct i2c_driver; | |
114 | struct i2c_adapter; | |
115 | struct i2c_client; | |
d2653e92 | 116 | struct i2c_device_id; |
dd99120c HV |
117 | struct v4l2_device; |
118 | struct v4l2_subdev; | |
119 | struct v4l2_subdev_ops; | |
8ffbc655 | 120 | |
a39c57f8 MCC |
121 | /** |
122 | * v4l2_i2c_new_subdev - Load an i2c module and return an initialized | |
123 | * &struct v4l2_subdev. | |
124 | * | |
125 | * @v4l2_dev: pointer to &struct v4l2_device | |
126 | * @adapter: pointer to struct i2c_adapter | |
127 | * @client_type: name of the chip that's on the adapter. | |
128 | * @addr: I2C address. If zero, it will use @probe_addrs | |
129 | * @probe_addrs: array with a list of address. The last entry at such | |
4a3fad70 | 130 | * array should be %I2C_CLIENT_END. |
a39c57f8 MCC |
131 | * |
132 | * returns a &struct v4l2_subdev pointer. | |
133 | */ | |
3c7c9370 | 134 | struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev, |
9a1f8b34 | 135 | struct i2c_adapter *adapter, const char *client_type, |
53dacb15 | 136 | u8 addr, const unsigned short *probe_addrs); |
f0222c7d | 137 | |
f0222c7d HV |
138 | struct i2c_board_info; |
139 | ||
a39c57f8 MCC |
140 | /** |
141 | * v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized | |
142 | * &struct v4l2_subdev. | |
143 | * | |
144 | * @v4l2_dev: pointer to &struct v4l2_device | |
145 | * @adapter: pointer to struct i2c_adapter | |
146 | * @info: pointer to struct i2c_board_info used to replace the irq, | |
147 | * platform_data and addr arguments. | |
148 | * @probe_addrs: array with a list of address. The last entry at such | |
4a3fad70 | 149 | * array should be %I2C_CLIENT_END. |
a39c57f8 MCC |
150 | * |
151 | * returns a &struct v4l2_subdev pointer. | |
152 | */ | |
f0222c7d | 153 | struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, |
9a1f8b34 LP |
154 | struct i2c_adapter *adapter, struct i2c_board_info *info, |
155 | const unsigned short *probe_addrs); | |
f0222c7d | 156 | |
06582930 SA |
157 | /** |
158 | * v4l2_i2c_subdev_set_name - Set name for an I²C sub-device | |
159 | * | |
160 | * @sd: pointer to &struct v4l2_subdev | |
161 | * @client: pointer to struct i2c_client | |
162 | * @devname: the name of the device; if NULL, the I²C device's name will be used | |
163 | * @postfix: sub-device specific string to put right after the I²C device name; | |
164 | * may be NULL | |
165 | */ | |
166 | void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client, | |
167 | const char *devname, const char *postfix); | |
168 | ||
a39c57f8 MCC |
169 | /** |
170 | * v4l2_i2c_subdev_init - Initializes a &struct v4l2_subdev with data from | |
171 | * an i2c_client struct. | |
172 | * | |
173 | * @sd: pointer to &struct v4l2_subdev | |
174 | * @client: pointer to struct i2c_client | |
175 | * @ops: pointer to &struct v4l2_subdev_ops | |
176 | */ | |
dd99120c HV |
177 | void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, |
178 | const struct v4l2_subdev_ops *ops); | |
a39c57f8 MCC |
179 | |
180 | /** | |
181 | * v4l2_i2c_subdev_addr - returns i2c client address of &struct v4l2_subdev. | |
182 | * | |
183 | * @sd: pointer to &struct v4l2_subdev | |
184 | * | |
185 | * Returns the address of an I2C sub-device | |
186 | */ | |
ab373190 | 187 | unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd); |
dd99120c | 188 | |
76a59fe7 MCC |
189 | /** |
190 | * enum v4l2_i2c_tuner_type - specifies the range of tuner address that | |
191 | * should be used when seeking for I2C devices. | |
192 | * | |
193 | * @ADDRS_RADIO: Radio tuner addresses. | |
194 | * Represent the following I2C addresses: | |
195 | * 0x10 (if compiled with tea5761 support) | |
196 | * and 0x60. | |
197 | * @ADDRS_DEMOD: Demod tuner addresses. | |
198 | * Represent the following I2C addresses: | |
199 | * 0x42, 0x43, 0x4a and 0x4b. | |
200 | * @ADDRS_TV: TV tuner addresses. | |
201 | * Represent the following I2C addresses: | |
202 | * 0x42, 0x43, 0x4a, 0x4b, 0x60, 0x61, 0x62, | |
203 | * 0x63 and 0x64. | |
204 | * @ADDRS_TV_WITH_DEMOD: TV tuner addresses if demod is present, this | |
205 | * excludes addresses used by the demodulator | |
206 | * from the list of candidates. | |
207 | * Represent the following I2C addresses: | |
208 | * 0x60, 0x61, 0x62, 0x63 and 0x64. | |
209 | * | |
210 | * NOTE: All I2C addresses above use the 7-bit notation. | |
211 | */ | |
c7d29e2f | 212 | enum v4l2_i2c_tuner_type { |
76a59fe7 MCC |
213 | ADDRS_RADIO, |
214 | ADDRS_DEMOD, | |
215 | ADDRS_TV, | |
c7d29e2f HV |
216 | ADDRS_TV_WITH_DEMOD, |
217 | }; | |
76a59fe7 MCC |
218 | /** |
219 | * v4l2_i2c_tuner_addrs - Return a list of I2C tuner addresses to probe. | |
220 | * | |
221 | * @type: type of the tuner to seek, as defined by | |
222 | * &enum v4l2_i2c_tuner_type. | |
223 | * | |
224 | * NOTE: Use only if the tuner addresses are unknown. | |
225 | */ | |
c7d29e2f HV |
226 | const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type); |
227 | ||
8ffbc655 | 228 | /* ------------------------------------------------------------------------- */ |
85e09219 DB |
229 | |
230 | /* SPI Helper functions */ | |
231 | #if defined(CONFIG_SPI) | |
232 | ||
233 | #include <linux/spi/spi.h> | |
234 | ||
235 | struct spi_device; | |
236 | ||
b8719158 MCC |
237 | /** |
238 | * v4l2_spi_new_subdev - Load an spi module and return an initialized | |
239 | * &struct v4l2_subdev. | |
240 | * | |
241 | * | |
242 | * @v4l2_dev: pointer to &struct v4l2_device. | |
243 | * @master: pointer to struct spi_master. | |
244 | * @info: pointer to struct spi_board_info. | |
245 | * | |
246 | * returns a &struct v4l2_subdev pointer. | |
247 | */ | |
85e09219 DB |
248 | struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, |
249 | struct spi_master *master, struct spi_board_info *info); | |
250 | ||
b8719158 MCC |
251 | /** |
252 | * v4l2_spi_subdev_init - Initialize a v4l2_subdev with data from an | |
253 | * spi_device struct. | |
254 | * | |
255 | * @sd: pointer to &struct v4l2_subdev | |
256 | * @spi: pointer to struct spi_device. | |
257 | * @ops: pointer to &struct v4l2_subdev_ops | |
258 | */ | |
85e09219 DB |
259 | void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi, |
260 | const struct v4l2_subdev_ops *ops); | |
261 | #endif | |
262 | ||
263 | /* ------------------------------------------------------------------------- */ | |
8ffbc655 | 264 | |
01154ef5 MCC |
265 | /* |
266 | * FIXME: these remaining ioctls/structs should be removed as well, but they | |
267 | * are still used in tuner-simple.c (TUNER_SET_CONFIG) and cx18/ivtv (RESET). | |
268 | * To remove these ioctls some more cleanup is needed in those modules. | |
76a59fe7 MCC |
269 | * |
270 | * It doesn't make much sense on documenting them, as what we really want is | |
271 | * to get rid of them. | |
01154ef5 | 272 | */ |
b2f0648f | 273 | |
78a3b4db | 274 | /* s_config */ |
7f171123 MCC |
275 | struct v4l2_priv_tun_config { |
276 | int tuner; | |
277 | void *priv; | |
278 | }; | |
7f171123 | 279 | #define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config) |
757d2505 | 280 | |
6e6a8b5a | 281 | #define VIDIOC_INT_RESET _IOW ('d', 102, u32) |
6c31e598 | 282 | |
b0d3159b TP |
283 | /* ------------------------------------------------------------------------- */ |
284 | ||
285 | /* Miscellaneous helper functions */ | |
286 | ||
76a59fe7 MCC |
287 | /** |
288 | * v4l_bound_align_image - adjust video dimensions according to | |
289 | * a given constraints. | |
290 | * | |
291 | * @width: pointer to width that will be adjusted if needed. | |
292 | * @wmin: minimum width. | |
293 | * @wmax: maximum width. | |
294 | * @walign: least significant bit on width. | |
295 | * @height: pointer to height that will be adjusted if needed. | |
296 | * @hmin: minimum height. | |
297 | * @hmax: maximum height. | |
ae5a8ca8 | 298 | * @halign: least significant bit on height. |
76a59fe7 MCC |
299 | * @salign: least significant bit for the image size (e. g. |
300 | * :math:`width * height`). | |
301 | * | |
302 | * Clip an image to have @width between @wmin and @wmax, and @height between | |
303 | * @hmin and @hmax, inclusive. | |
304 | * | |
305 | * Additionally, the @width will be a multiple of :math:`2^{walign}`, | |
306 | * the @height will be a multiple of :math:`2^{halign}`, and the overall | |
307 | * size :math:`width * height` will be a multiple of :math:`2^{salign}`. | |
308 | * | |
309 | * .. note:: | |
310 | * | |
311 | * #. The clipping rectangle may be shrunk or enlarged to fit the alignment | |
312 | * constraints. | |
313 | * #. @wmax must not be smaller than @wmin. | |
314 | * #. @hmax must not be smaller than @hmin. | |
315 | * #. The alignments must not be so high there are no possible image | |
316 | * sizes within the allowed bounds. | |
317 | * #. @wmin and @hmin must be at least 1 (don't use 0). | |
318 | * #. For @walign, @halign and @salign, if you don't care about a certain | |
319 | * alignment, specify ``0``, as :math:`2^0 = 1` and one byte alignment | |
320 | * is equivalent to no alignment. | |
321 | * #. If you only want to adjust downward, specify a maximum that's the | |
322 | * same as the initial value. | |
323 | */ | |
324 | void v4l_bound_align_image(unsigned int *width, unsigned int wmin, | |
b0d3159b | 325 | unsigned int wmax, unsigned int walign, |
76a59fe7 | 326 | unsigned int *height, unsigned int hmin, |
b0d3159b TP |
327 | unsigned int hmax, unsigned int halign, |
328 | unsigned int salign); | |
3fd8e647 | 329 | |
95ce9c28 SA |
330 | /** |
331 | * v4l2_find_nearest_size - Find the nearest size among a discrete | |
332 | * set of resolutions contained in an array of a driver specific struct. | |
333 | * | |
334 | * @array: a driver specific array of image sizes | |
d2dc57b1 | 335 | * @array_size: the length of the driver specific array of image sizes |
95ce9c28 SA |
336 | * @width_field: the name of the width field in the driver specific struct |
337 | * @height_field: the name of the height field in the driver specific struct | |
338 | * @width: desired width. | |
339 | * @height: desired height. | |
340 | * | |
341 | * Finds the closest resolution to minimize the width and height differences | |
342 | * between what requested and the supported resolutions. The size of the width | |
343 | * and height fields in the driver specific must equal to that of u32, i.e. four | |
344 | * bytes. | |
345 | * | |
346 | * Returns the best match or NULL if the length of the array is zero. | |
347 | */ | |
d2dc57b1 | 348 | #define v4l2_find_nearest_size(array, array_size, width_field, height_field, \ |
95ce9c28 SA |
349 | width, height) \ |
350 | ({ \ | |
351 | BUILD_BUG_ON(sizeof((array)->width_field) != sizeof(u32) || \ | |
352 | sizeof((array)->height_field) != sizeof(u32)); \ | |
2bbc46e8 | 353 | (typeof(&(array)[0]))__v4l2_find_nearest_size( \ |
d2dc57b1 | 354 | (array), array_size, sizeof(*(array)), \ |
95ce9c28 SA |
355 | offsetof(typeof(*(array)), width_field), \ |
356 | offsetof(typeof(*(array)), height_field), \ | |
357 | width, height); \ | |
358 | }) | |
359 | const void * | |
360 | __v4l2_find_nearest_size(const void *array, size_t array_size, | |
361 | size_t entry_size, size_t width_offset, | |
362 | size_t height_offset, s32 width, s32 height); | |
363 | ||
672de9a7 HV |
364 | /** |
365 | * v4l2_g_parm_cap - helper routine for vidioc_g_parm to fill this in by | |
366 | * calling the g_frame_interval op of the given subdev. It only works | |
367 | * for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the | |
368 | * function name. | |
369 | * | |
370 | * @vdev: the struct video_device pointer. Used to determine the device caps. | |
371 | * @sd: the sub-device pointer. | |
372 | * @a: the VIDIOC_G_PARM argument. | |
373 | */ | |
374 | int v4l2_g_parm_cap(struct video_device *vdev, | |
375 | struct v4l2_subdev *sd, struct v4l2_streamparm *a); | |
376 | ||
377 | /** | |
378 | * v4l2_s_parm_cap - helper routine for vidioc_s_parm to fill this in by | |
379 | * calling the s_frame_interval op of the given subdev. It only works | |
380 | * for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the | |
381 | * function name. | |
382 | * | |
383 | * @vdev: the struct video_device pointer. Used to determine the device caps. | |
384 | * @sd: the sub-device pointer. | |
385 | * @a: the VIDIOC_S_PARM argument. | |
386 | */ | |
387 | int v4l2_s_parm_cap(struct video_device *vdev, | |
388 | struct v4l2_subdev *sd, struct v4l2_streamparm *a); | |
389 | ||
85de5e06 AM |
390 | /* Compare two v4l2_fract structs */ |
391 | #define V4L2_FRACT_COMPARE(a, OP, b) \ | |
392 | ((u64)(a).numerator * (b).denominator OP \ | |
393 | (u64)(b).numerator * (a).denominator) | |
394 | ||
b2f0648f | 395 | #endif /* V4L2_COMMON_H_ */ |