diff options
Diffstat (limited to 'drivers/media/video/mt9v011.c')
-rw-r--r-- | drivers/media/video/mt9v011.c | 431 |
1 files changed, 431 insertions, 0 deletions
diff --git a/drivers/media/video/mt9v011.c b/drivers/media/video/mt9v011.c new file mode 100644 index 000000000000..1fe8fc9183a7 --- /dev/null +++ b/drivers/media/video/mt9v011.c | |||
@@ -0,0 +1,431 @@ | |||
1 | /* | ||
2 | * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor | ||
3 | * | ||
4 | * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com) | ||
5 | * This code is placed under the terms of the GNU General Public License v2 | ||
6 | */ | ||
7 | |||
8 | #include <linux/i2c.h> | ||
9 | #include <linux/videodev2.h> | ||
10 | #include <linux/delay.h> | ||
11 | #include <media/v4l2-device.h> | ||
12 | #include "mt9v011.h" | ||
13 | #include <media/v4l2-i2c-drv.h> | ||
14 | #include <media/v4l2-chip-ident.h> | ||
15 | |||
16 | MODULE_DESCRIPTION("Micron mt9v011 sensor driver"); | ||
17 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); | ||
18 | MODULE_LICENSE("GPL"); | ||
19 | |||
20 | |||
21 | static int debug; | ||
22 | module_param(debug, int, 0); | ||
23 | MODULE_PARM_DESC(debug, "Debug level (0-2)"); | ||
24 | |||
25 | /* supported controls */ | ||
26 | static struct v4l2_queryctrl mt9v011_qctrl[] = { | ||
27 | { | ||
28 | .id = V4L2_CID_GAIN, | ||
29 | .type = V4L2_CTRL_TYPE_INTEGER, | ||
30 | .name = "Gain", | ||
31 | .minimum = 0, | ||
32 | .maximum = (1 << 10) - 1, | ||
33 | .step = 1, | ||
34 | .default_value = 0x0020, | ||
35 | .flags = 0, | ||
36 | }, { | ||
37 | .id = V4L2_CID_RED_BALANCE, | ||
38 | .type = V4L2_CTRL_TYPE_INTEGER, | ||
39 | .name = "Red Balance", | ||
40 | .minimum = -1 << 9, | ||
41 | .maximum = (1 << 9) - 1, | ||
42 | .step = 1, | ||
43 | .default_value = 0, | ||
44 | .flags = 0, | ||
45 | }, { | ||
46 | .id = V4L2_CID_BLUE_BALANCE, | ||
47 | .type = V4L2_CTRL_TYPE_INTEGER, | ||
48 | .name = "Blue Balance", | ||
49 | .minimum = -1 << 9, | ||
50 | .maximum = (1 << 9) - 1, | ||
51 | .step = 1, | ||
52 | .default_value = 0, | ||
53 | .flags = 0, | ||
54 | }, | ||
55 | }; | ||
56 | |||
57 | struct mt9v011 { | ||
58 | struct v4l2_subdev sd; | ||
59 | unsigned width, height; | ||
60 | |||
61 | u16 global_gain, red_bal, blue_bal; | ||
62 | }; | ||
63 | |||
64 | static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd) | ||
65 | { | ||
66 | return container_of(sd, struct mt9v011, sd); | ||
67 | } | ||
68 | |||
69 | static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr) | ||
70 | { | ||
71 | struct i2c_client *c = v4l2_get_subdevdata(sd); | ||
72 | __be16 buffer; | ||
73 | int rc, val; | ||
74 | |||
75 | rc = i2c_master_send(c, &addr, 1); | ||
76 | if (rc != 1) | ||
77 | v4l2_dbg(0, debug, sd, | ||
78 | "i2c i/o error: rc == %d (should be 1)\n", rc); | ||
79 | |||
80 | msleep(10); | ||
81 | |||
82 | rc = i2c_master_recv(c, (char *)&buffer, 2); | ||
83 | if (rc != 2) | ||
84 | v4l2_dbg(0, debug, sd, | ||
85 | "i2c i/o error: rc == %d (should be 2)\n", rc); | ||
86 | |||
87 | val = be16_to_cpu(buffer); | ||
88 | |||
89 | v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val); | ||
90 | |||
91 | return val; | ||
92 | } | ||
93 | |||
94 | static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr, | ||
95 | u16 value) | ||
96 | { | ||
97 | struct i2c_client *c = v4l2_get_subdevdata(sd); | ||
98 | unsigned char buffer[3]; | ||
99 | int rc; | ||
100 | |||
101 | buffer[0] = addr; | ||
102 | buffer[1] = value >> 8; | ||
103 | buffer[2] = value & 0xff; | ||
104 | |||
105 | v4l2_dbg(2, debug, sd, | ||
106 | "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value); | ||
107 | rc = i2c_master_send(c, buffer, 3); | ||
108 | if (rc != 3) | ||
109 | v4l2_dbg(0, debug, sd, | ||
110 | "i2c i/o error: rc == %d (should be 3)\n", rc); | ||
111 | } | ||
112 | |||
113 | |||
114 | struct i2c_reg_value { | ||
115 | unsigned char reg; | ||
116 | u16 value; | ||
117 | }; | ||
118 | |||
119 | /* | ||
120 | * Values used at the original driver | ||
121 | * Some values are marked as Reserved at the datasheet | ||
122 | */ | ||
123 | static const struct i2c_reg_value mt9v011_init_default[] = { | ||
124 | { R0D_MT9V011_RESET, 0x0001 }, | ||
125 | { R0D_MT9V011_RESET, 0x0000 }, | ||
126 | |||
127 | { R0C_MT9V011_SHUTTER_DELAY, 0x0000 }, | ||
128 | { R09_MT9V011_SHUTTER_WIDTH, 0x1fc }, | ||
129 | |||
130 | { R0A_MT9V011_CLK_SPEED, 0x0000 }, | ||
131 | { R1E_MT9V011_DIGITAL_ZOOM, 0x0000 }, | ||
132 | { R20_MT9V011_READ_MODE, 0x1000 }, | ||
133 | |||
134 | { R07_MT9V011_OUT_CTRL, 0x000a }, /* chip enable */ | ||
135 | }; | ||
136 | |||
137 | static void set_balance(struct v4l2_subdev *sd) | ||
138 | { | ||
139 | struct mt9v011 *core = to_mt9v011(sd); | ||
140 | u16 green1_gain, green2_gain, blue_gain, red_gain; | ||
141 | |||
142 | green1_gain = core->global_gain; | ||
143 | green2_gain = core->global_gain; | ||
144 | |||
145 | blue_gain = core->global_gain + | ||
146 | core->global_gain * core->blue_bal / (1 << 9); | ||
147 | |||
148 | red_gain = core->global_gain + | ||
149 | core->global_gain * core->blue_bal / (1 << 9); | ||
150 | |||
151 | mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain); | ||
152 | mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain); | ||
153 | mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain); | ||
154 | mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain); | ||
155 | } | ||
156 | |||
157 | static void set_res(struct v4l2_subdev *sd) | ||
158 | { | ||
159 | struct mt9v011 *core = to_mt9v011(sd); | ||
160 | unsigned vstart, hstart; | ||
161 | |||
162 | /* | ||
163 | * The mt9v011 doesn't have scaling. So, in order to select the desired | ||
164 | * resolution, we're cropping at the middle of the sensor. | ||
165 | * hblank and vblank should be adjusted, in order to warrant that | ||
166 | * we'll preserve the line timings for 30 fps, no matter what resolution | ||
167 | * is selected. | ||
168 | * NOTE: datasheet says that width (and height) should be filled with | ||
169 | * width-1. However, this doesn't work, since one pixel per line will | ||
170 | * be missing. | ||
171 | */ | ||
172 | |||
173 | hstart = 14 + (640 - core->width) / 2; | ||
174 | mt9v011_write(sd, R02_MT9V011_COLSTART, hstart); | ||
175 | mt9v011_write(sd, R04_MT9V011_WIDTH, core->width); | ||
176 | mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width); | ||
177 | |||
178 | vstart = 8 + (640 - core->height) / 2; | ||
179 | mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart); | ||
180 | mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height); | ||
181 | mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height); | ||
182 | }; | ||
183 | |||
184 | static int mt9v011_reset(struct v4l2_subdev *sd, u32 val) | ||
185 | { | ||
186 | int i; | ||
187 | |||
188 | for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++) | ||
189 | mt9v011_write(sd, mt9v011_init_default[i].reg, | ||
190 | mt9v011_init_default[i].value); | ||
191 | |||
192 | set_balance(sd); | ||
193 | set_res(sd); | ||
194 | |||
195 | return 0; | ||
196 | }; | ||
197 | |||
198 | static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | ||
199 | { | ||
200 | struct mt9v011 *core = to_mt9v011(sd); | ||
201 | |||
202 | v4l2_dbg(1, debug, sd, "g_ctrl called\n"); | ||
203 | |||
204 | switch (ctrl->id) { | ||
205 | case V4L2_CID_GAIN: | ||
206 | ctrl->value = core->global_gain; | ||
207 | return 0; | ||
208 | case V4L2_CID_RED_BALANCE: | ||
209 | ctrl->value = core->red_bal; | ||
210 | return 0; | ||
211 | case V4L2_CID_BLUE_BALANCE: | ||
212 | ctrl->value = core->blue_bal; | ||
213 | return 0; | ||
214 | } | ||
215 | return -EINVAL; | ||
216 | } | ||
217 | |||
218 | static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | ||
219 | { | ||
220 | struct mt9v011 *core = to_mt9v011(sd); | ||
221 | u8 i, n; | ||
222 | n = ARRAY_SIZE(mt9v011_qctrl); | ||
223 | |||
224 | for (i = 0; i < n; i++) { | ||
225 | if (ctrl->id != mt9v011_qctrl[i].id) | ||
226 | continue; | ||
227 | if (ctrl->value < mt9v011_qctrl[i].minimum || | ||
228 | ctrl->value > mt9v011_qctrl[i].maximum) | ||
229 | return -ERANGE; | ||
230 | v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n", | ||
231 | ctrl->id, ctrl->value); | ||
232 | break; | ||
233 | } | ||
234 | |||
235 | switch (ctrl->id) { | ||
236 | case V4L2_CID_GAIN: | ||
237 | core->global_gain = ctrl->value; | ||
238 | break; | ||
239 | case V4L2_CID_RED_BALANCE: | ||
240 | core->red_bal = ctrl->value; | ||
241 | break; | ||
242 | case V4L2_CID_BLUE_BALANCE: | ||
243 | core->blue_bal = ctrl->value; | ||
244 | break; | ||
245 | default: | ||
246 | return -EINVAL; | ||
247 | } | ||
248 | |||
249 | set_balance(sd); | ||
250 | |||
251 | return 0; | ||
252 | } | ||
253 | |||
254 | static int mt9v011_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt) | ||
255 | { | ||
256 | if (fmt->index > 0) | ||
257 | return -EINVAL; | ||
258 | |||
259 | fmt->flags = 0; | ||
260 | strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG"); | ||
261 | fmt->pixelformat = V4L2_PIX_FMT_SGRBG8; | ||
262 | |||
263 | return 0; | ||
264 | } | ||
265 | |||
266 | static int mt9v011_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt) | ||
267 | { | ||
268 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | ||
269 | |||
270 | if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8) | ||
271 | return -EINVAL; | ||
272 | |||
273 | v4l_bound_align_image(&pix->width, 48, 639, 1, | ||
274 | &pix->height, 32, 480, 1, 0); | ||
275 | |||
276 | return 0; | ||
277 | } | ||
278 | |||
279 | static int mt9v011_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt) | ||
280 | { | ||
281 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | ||
282 | struct mt9v011 *core = to_mt9v011(sd); | ||
283 | int rc; | ||
284 | |||
285 | rc = mt9v011_try_fmt(sd, fmt); | ||
286 | if (rc < 0) | ||
287 | return -EINVAL; | ||
288 | |||
289 | core->width = pix->width; | ||
290 | core->height = pix->height; | ||
291 | |||
292 | set_res(sd); | ||
293 | |||
294 | return 0; | ||
295 | } | ||
296 | |||
297 | |||
298 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
299 | static int mt9v011_g_register(struct v4l2_subdev *sd, | ||
300 | struct v4l2_dbg_register *reg) | ||
301 | { | ||
302 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
303 | |||
304 | if (!v4l2_chip_match_i2c_client(client, ®->match)) | ||
305 | return -EINVAL; | ||
306 | if (!capable(CAP_SYS_ADMIN)) | ||
307 | return -EPERM; | ||
308 | |||
309 | reg->val = mt9v011_read(sd, reg->reg & 0xff); | ||
310 | reg->size = 2; | ||
311 | |||
312 | return 0; | ||
313 | } | ||
314 | |||
315 | static int mt9v011_s_register(struct v4l2_subdev *sd, | ||
316 | struct v4l2_dbg_register *reg) | ||
317 | { | ||
318 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
319 | |||
320 | if (!v4l2_chip_match_i2c_client(client, ®->match)) | ||
321 | return -EINVAL; | ||
322 | if (!capable(CAP_SYS_ADMIN)) | ||
323 | return -EPERM; | ||
324 | |||
325 | mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff); | ||
326 | |||
327 | return 0; | ||
328 | } | ||
329 | #endif | ||
330 | |||
331 | static int mt9v011_g_chip_ident(struct v4l2_subdev *sd, | ||
332 | struct v4l2_dbg_chip_ident *chip) | ||
333 | { | ||
334 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
335 | |||
336 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011, | ||
337 | MT9V011_VERSION); | ||
338 | } | ||
339 | |||
340 | static const struct v4l2_subdev_core_ops mt9v011_core_ops = { | ||
341 | .g_ctrl = mt9v011_g_ctrl, | ||
342 | .s_ctrl = mt9v011_s_ctrl, | ||
343 | .reset = mt9v011_reset, | ||
344 | .g_chip_ident = mt9v011_g_chip_ident, | ||
345 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
346 | .g_register = mt9v011_g_register, | ||
347 | .s_register = mt9v011_s_register, | ||
348 | #endif | ||
349 | }; | ||
350 | |||
351 | static const struct v4l2_subdev_video_ops mt9v011_video_ops = { | ||
352 | .enum_fmt = mt9v011_enum_fmt, | ||
353 | .try_fmt = mt9v011_try_fmt, | ||
354 | .s_fmt = mt9v011_s_fmt, | ||
355 | }; | ||
356 | |||
357 | static const struct v4l2_subdev_ops mt9v011_ops = { | ||
358 | .core = &mt9v011_core_ops, | ||
359 | .video = &mt9v011_video_ops, | ||
360 | }; | ||
361 | |||
362 | |||
363 | /**************************************************************************** | ||
364 | I2C Client & Driver | ||
365 | ****************************************************************************/ | ||
366 | |||
367 | static int mt9v011_probe(struct i2c_client *c, | ||
368 | const struct i2c_device_id *id) | ||
369 | { | ||
370 | u16 version; | ||
371 | struct mt9v011 *core; | ||
372 | struct v4l2_subdev *sd; | ||
373 | |||
374 | /* Check if the adapter supports the needed features */ | ||
375 | if (!i2c_check_functionality(c->adapter, | ||
376 | I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) | ||
377 | return -EIO; | ||
378 | |||
379 | core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL); | ||
380 | if (!core) | ||
381 | return -ENOMEM; | ||
382 | |||
383 | sd = &core->sd; | ||
384 | v4l2_i2c_subdev_init(sd, c, &mt9v011_ops); | ||
385 | |||
386 | /* Check if the sensor is really a MT9V011 */ | ||
387 | version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION); | ||
388 | if (version != MT9V011_VERSION) { | ||
389 | v4l2_info(sd, "*** unknown micron chip detected (0x%04x.\n", | ||
390 | version); | ||
391 | kfree(core); | ||
392 | return -EINVAL; | ||
393 | } | ||
394 | |||
395 | core->global_gain = 0x0024; | ||
396 | core->width = 640; | ||
397 | core->height = 480; | ||
398 | |||
399 | v4l_info(c, "chip found @ 0x%02x (%s)\n", | ||
400 | c->addr << 1, c->adapter->name); | ||
401 | |||
402 | return 0; | ||
403 | } | ||
404 | |||
405 | static int mt9v011_remove(struct i2c_client *c) | ||
406 | { | ||
407 | struct v4l2_subdev *sd = i2c_get_clientdata(c); | ||
408 | |||
409 | v4l2_dbg(1, debug, sd, | ||
410 | "mt9v011.c: removing mt9v011 adapter on address 0x%x\n", | ||
411 | c->addr << 1); | ||
412 | |||
413 | v4l2_device_unregister_subdev(sd); | ||
414 | kfree(to_mt9v011(sd)); | ||
415 | return 0; | ||
416 | } | ||
417 | |||
418 | /* ----------------------------------------------------------------------- */ | ||
419 | |||
420 | static const struct i2c_device_id mt9v011_id[] = { | ||
421 | { "mt9v011", 0 }, | ||
422 | { } | ||
423 | }; | ||
424 | MODULE_DEVICE_TABLE(i2c, mt9v011_id); | ||
425 | |||
426 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { | ||
427 | .name = "mt9v011", | ||
428 | .probe = mt9v011_probe, | ||
429 | .remove = mt9v011_remove, | ||
430 | .id_table = mt9v011_id, | ||
431 | }; | ||