1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices |
4 | // |
5 | // Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@kernel.org> |
6 | // Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com> |
7 | |
8 | #include "em28xx.h" |
9 | |
10 | #include <linux/i2c.h> |
11 | #include <linux/usb.h> |
12 | #include <media/i2c/mt9v011.h> |
13 | #include <media/v4l2-common.h> |
14 | |
15 | /* Possible i2c addresses of Micron sensors */ |
16 | static unsigned short micron_sensor_addrs[] = { |
17 | 0xb8 >> 1, /* MT9V111, MT9V403 */ |
18 | 0xba >> 1, /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */ |
19 | 0x90 >> 1, /* MT9V012/112, MT9D011 (alternative address) */ |
20 | I2C_CLIENT_END |
21 | }; |
22 | |
23 | /* Possible i2c addresses of Omnivision sensors */ |
24 | static unsigned short omnivision_sensor_addrs[] = { |
25 | 0x42 >> 1, /* OV7725, OV7670/60/48 */ |
26 | 0x60 >> 1, /* OV2640, OV9650/53/55 */ |
27 | I2C_CLIENT_END |
28 | }; |
29 | |
30 | /* FIXME: Should be replaced by a proper mt9m111 driver */ |
31 | static int em28xx_initialize_mt9m111(struct em28xx *dev) |
32 | { |
33 | int i; |
34 | unsigned char regs[][3] = { |
35 | { 0x0d, 0x00, 0x01, }, /* reset and use defaults */ |
36 | { 0x0d, 0x00, 0x00, }, |
37 | { 0x0a, 0x00, 0x21, }, |
38 | { 0x21, 0x04, 0x00, }, /* full readout spd, no row/col skip */ |
39 | }; |
40 | |
41 | for (i = 0; i < ARRAY_SIZE(regs); i++) |
42 | i2c_master_send(client: &dev->i2c_client[dev->def_i2c_bus], |
43 | buf: ®s[i][0], count: 3); |
44 | |
45 | /* FIXME: This won't be creating a sensor at the media graph */ |
46 | |
47 | return 0; |
48 | } |
49 | |
50 | /* FIXME: Should be replaced by a proper mt9m001 driver */ |
51 | static int em28xx_initialize_mt9m001(struct em28xx *dev) |
52 | { |
53 | int i; |
54 | unsigned char regs[][3] = { |
55 | { 0x0d, 0x00, 0x01, }, |
56 | { 0x0d, 0x00, 0x00, }, |
57 | { 0x04, 0x05, 0x00, }, /* hres = 1280 */ |
58 | { 0x03, 0x04, 0x00, }, /* vres = 1024 */ |
59 | { 0x20, 0x11, 0x00, }, |
60 | { 0x06, 0x00, 0x10, }, |
61 | { 0x2b, 0x00, 0x24, }, |
62 | { 0x2e, 0x00, 0x24, }, |
63 | { 0x35, 0x00, 0x24, }, |
64 | { 0x2d, 0x00, 0x20, }, |
65 | { 0x2c, 0x00, 0x20, }, |
66 | { 0x09, 0x0a, 0xd4, }, |
67 | { 0x35, 0x00, 0x57, }, |
68 | }; |
69 | |
70 | for (i = 0; i < ARRAY_SIZE(regs); i++) |
71 | i2c_master_send(client: &dev->i2c_client[dev->def_i2c_bus], |
72 | buf: ®s[i][0], count: 3); |
73 | |
74 | /* FIXME: This won't be creating a sensor at the media graph */ |
75 | |
76 | return 0; |
77 | } |
78 | |
79 | /* |
80 | * Probes Micron sensors with 8 bit address and 16 bit register width |
81 | */ |
82 | static int em28xx_probe_sensor_micron(struct em28xx *dev) |
83 | { |
84 | int ret, i; |
85 | char *name; |
86 | u16 id; |
87 | |
88 | struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus]; |
89 | |
90 | dev->em28xx_sensor = EM28XX_NOSENSOR; |
91 | for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) { |
92 | client->addr = micron_sensor_addrs[i]; |
93 | /* Read chip ID from register 0x00 */ |
94 | ret = i2c_smbus_read_word_data(client, command: 0x00); /* assumes LE */ |
95 | if (ret < 0) { |
96 | if (ret != -ENXIO) |
97 | dev_err(&dev->intf->dev, |
98 | "couldn't read from i2c device 0x%02x: error %i\n" , |
99 | client->addr << 1, ret); |
100 | continue; |
101 | } |
102 | id = swab16(ret); /* LE -> BE */ |
103 | /* Read chip ID from register 0xff */ |
104 | ret = i2c_smbus_read_word_data(client, command: 0xff); |
105 | if (ret < 0) { |
106 | dev_err(&dev->intf->dev, |
107 | "couldn't read from i2c device 0x%02x: error %i\n" , |
108 | client->addr << 1, ret); |
109 | continue; |
110 | } |
111 | /* Validate chip ID to be sure we have a Micron device */ |
112 | if (id != swab16(ret)) |
113 | continue; |
114 | /* Check chip ID */ |
115 | switch (id) { |
116 | case 0x1222: |
117 | name = "MT9V012" ; /* MI370 */ /* 640x480 */ |
118 | break; |
119 | case 0x1229: |
120 | name = "MT9V112" ; /* 640x480 */ |
121 | break; |
122 | case 0x1433: |
123 | name = "MT9M011" ; /* 1280x1024 */ |
124 | break; |
125 | case 0x143a: /* found in the ECS G200 */ |
126 | name = "MT9M111" ; /* MI1310 */ /* 1280x1024 */ |
127 | dev->em28xx_sensor = EM28XX_MT9M111; |
128 | break; |
129 | case 0x148c: |
130 | name = "MT9M112" ; /* MI1320 */ /* 1280x1024 */ |
131 | break; |
132 | case 0x1511: |
133 | name = "MT9D011" ; /* MI2010 */ /* 1600x1200 */ |
134 | break; |
135 | case 0x8232: |
136 | case 0x8243: /* rev B */ |
137 | name = "MT9V011" ; /* MI360 */ /* 640x480 */ |
138 | dev->em28xx_sensor = EM28XX_MT9V011; |
139 | break; |
140 | case 0x8431: |
141 | name = "MT9M001" ; /* 1280x1024 */ |
142 | dev->em28xx_sensor = EM28XX_MT9M001; |
143 | break; |
144 | default: |
145 | dev_info(&dev->intf->dev, |
146 | "unknown Micron sensor detected: 0x%04x\n" , |
147 | id); |
148 | return 0; |
149 | } |
150 | |
151 | if (dev->em28xx_sensor == EM28XX_NOSENSOR) |
152 | dev_info(&dev->intf->dev, |
153 | "unsupported sensor detected: %s\n" , name); |
154 | else |
155 | dev_info(&dev->intf->dev, |
156 | "sensor %s detected\n" , name); |
157 | |
158 | return 0; |
159 | } |
160 | |
161 | return -ENODEV; |
162 | } |
163 | |
164 | /* |
165 | * Probes Omnivision sensors with 8 bit address and register width |
166 | */ |
167 | static int em28xx_probe_sensor_omnivision(struct em28xx *dev) |
168 | { |
169 | int ret, i; |
170 | char *name; |
171 | u8 reg; |
172 | u16 id; |
173 | struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus]; |
174 | |
175 | dev->em28xx_sensor = EM28XX_NOSENSOR; |
176 | /* |
177 | * NOTE: these devices have the register auto incrementation disabled |
178 | * by default, so we have to use single byte reads ! |
179 | */ |
180 | for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) { |
181 | client->addr = omnivision_sensor_addrs[i]; |
182 | /* Read manufacturer ID from registers 0x1c-0x1d (BE) */ |
183 | reg = 0x1c; |
184 | ret = i2c_smbus_read_byte_data(client, command: reg); |
185 | if (ret < 0) { |
186 | if (ret != -ENXIO) |
187 | dev_err(&dev->intf->dev, |
188 | "couldn't read from i2c device 0x%02x: error %i\n" , |
189 | client->addr << 1, ret); |
190 | continue; |
191 | } |
192 | id = ret << 8; |
193 | reg = 0x1d; |
194 | ret = i2c_smbus_read_byte_data(client, command: reg); |
195 | if (ret < 0) { |
196 | dev_err(&dev->intf->dev, |
197 | "couldn't read from i2c device 0x%02x: error %i\n" , |
198 | client->addr << 1, ret); |
199 | continue; |
200 | } |
201 | id += ret; |
202 | /* Check manufacturer ID */ |
203 | if (id != 0x7fa2) |
204 | continue; |
205 | /* Read product ID from registers 0x0a-0x0b (BE) */ |
206 | reg = 0x0a; |
207 | ret = i2c_smbus_read_byte_data(client, command: reg); |
208 | if (ret < 0) { |
209 | dev_err(&dev->intf->dev, |
210 | "couldn't read from i2c device 0x%02x: error %i\n" , |
211 | client->addr << 1, ret); |
212 | continue; |
213 | } |
214 | id = ret << 8; |
215 | reg = 0x0b; |
216 | ret = i2c_smbus_read_byte_data(client, command: reg); |
217 | if (ret < 0) { |
218 | dev_err(&dev->intf->dev, |
219 | "couldn't read from i2c device 0x%02x: error %i\n" , |
220 | client->addr << 1, ret); |
221 | continue; |
222 | } |
223 | id += ret; |
224 | /* Check product ID */ |
225 | switch (id) { |
226 | case 0x2642: |
227 | name = "OV2640" ; |
228 | dev->em28xx_sensor = EM28XX_OV2640; |
229 | break; |
230 | case 0x7648: |
231 | name = "OV7648" ; |
232 | break; |
233 | case 0x7660: |
234 | name = "OV7660" ; |
235 | break; |
236 | case 0x7673: |
237 | name = "OV7670" ; |
238 | break; |
239 | case 0x7720: |
240 | name = "OV7720" ; |
241 | break; |
242 | case 0x7721: |
243 | name = "OV7725" ; |
244 | break; |
245 | case 0x9648: /* Rev 2 */ |
246 | case 0x9649: /* Rev 3 */ |
247 | name = "OV9640" ; |
248 | break; |
249 | case 0x9650: |
250 | case 0x9652: /* OV9653 */ |
251 | name = "OV9650" ; |
252 | break; |
253 | case 0x9656: /* Rev 4 */ |
254 | case 0x9657: /* Rev 5 */ |
255 | name = "OV9655" ; |
256 | break; |
257 | default: |
258 | dev_info(&dev->intf->dev, |
259 | "unknown OmniVision sensor detected: 0x%04x\n" , |
260 | id); |
261 | return 0; |
262 | } |
263 | |
264 | if (dev->em28xx_sensor == EM28XX_NOSENSOR) |
265 | dev_info(&dev->intf->dev, |
266 | "unsupported sensor detected: %s\n" , name); |
267 | else |
268 | dev_info(&dev->intf->dev, |
269 | "sensor %s detected\n" , name); |
270 | |
271 | return 0; |
272 | } |
273 | |
274 | return -ENODEV; |
275 | } |
276 | |
277 | int em28xx_detect_sensor(struct em28xx *dev) |
278 | { |
279 | int ret; |
280 | |
281 | ret = em28xx_probe_sensor_micron(dev); |
282 | |
283 | if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) |
284 | ret = em28xx_probe_sensor_omnivision(dev); |
285 | |
286 | /* |
287 | * NOTE: the Windows driver also probes i2c addresses |
288 | * 0x22 (Samsung ?) and 0x66 (Kodak ?) |
289 | */ |
290 | |
291 | if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) { |
292 | dev_info(&dev->intf->dev, |
293 | "No sensor detected\n" ); |
294 | return -ENODEV; |
295 | } |
296 | |
297 | return 0; |
298 | } |
299 | |
300 | int em28xx_init_camera(struct em28xx *dev) |
301 | { |
302 | struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus]; |
303 | struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus]; |
304 | struct em28xx_v4l2 *v4l2 = dev->v4l2; |
305 | |
306 | switch (dev->em28xx_sensor) { |
307 | case EM28XX_MT9V011: |
308 | { |
309 | struct mt9v011_platform_data pdata; |
310 | struct i2c_board_info mt9v011_info = { |
311 | .type = "mt9v011" , |
312 | .addr = client->addr, |
313 | .platform_data = &pdata, |
314 | }; |
315 | |
316 | v4l2->sensor_xres = 640; |
317 | v4l2->sensor_yres = 480; |
318 | |
319 | /* |
320 | * FIXME: mt9v011 uses I2S speed as xtal clk - at least with |
321 | * the Silvercrest cam I have here for testing - for higher |
322 | * resolutions, a high clock cause horizontal artifacts, so we |
323 | * need to use a lower xclk frequency. |
324 | * Yet, it would be possible to adjust xclk depending on the |
325 | * desired resolution, since this affects directly the |
326 | * frame rate. |
327 | */ |
328 | dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ; |
329 | em28xx_write_reg(dev, EM28XX_R0F_XCLK, val: dev->board.xclk); |
330 | v4l2->sensor_xtal = 4300000; |
331 | pdata.xtal = v4l2->sensor_xtal; |
332 | if (NULL == |
333 | v4l2_i2c_new_subdev_board(v4l2_dev: &v4l2->v4l2_dev, adapter: adap, |
334 | info: &mt9v011_info, NULL)) |
335 | return -ENODEV; |
336 | v4l2->vinmode = EM28XX_VINMODE_RGB8_GRBG; |
337 | v4l2->vinctl = 0x00; |
338 | |
339 | break; |
340 | } |
341 | case EM28XX_MT9M001: |
342 | v4l2->sensor_xres = 1280; |
343 | v4l2->sensor_yres = 1024; |
344 | |
345 | em28xx_initialize_mt9m001(dev); |
346 | |
347 | v4l2->vinmode = EM28XX_VINMODE_RGB8_BGGR; |
348 | v4l2->vinctl = 0x00; |
349 | |
350 | break; |
351 | case EM28XX_MT9M111: |
352 | v4l2->sensor_xres = 640; |
353 | v4l2->sensor_yres = 512; |
354 | |
355 | dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ; |
356 | em28xx_write_reg(dev, EM28XX_R0F_XCLK, val: dev->board.xclk); |
357 | em28xx_initialize_mt9m111(dev); |
358 | |
359 | v4l2->vinmode = EM28XX_VINMODE_YUV422_UYVY; |
360 | v4l2->vinctl = 0x00; |
361 | |
362 | break; |
363 | case EM28XX_OV2640: |
364 | { |
365 | struct v4l2_subdev *subdev; |
366 | struct i2c_board_info ov2640_info = { |
367 | .type = "ov2640" , |
368 | .flags = I2C_CLIENT_SCCB, |
369 | .addr = client->addr, |
370 | }; |
371 | struct v4l2_subdev_format format = { |
372 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
373 | }; |
374 | |
375 | /* |
376 | * FIXME: sensor supports resolutions up to 1600x1200, but |
377 | * resolution setting/switching needs to be modified to |
378 | * - switch sensor output resolution (including further |
379 | * configuration changes) |
380 | * - adjust bridge xclk |
381 | * - disable 16 bit (12 bit) output formats on high resolutions |
382 | */ |
383 | v4l2->sensor_xres = 640; |
384 | v4l2->sensor_yres = 480; |
385 | |
386 | subdev = |
387 | v4l2_i2c_new_subdev_board(v4l2_dev: &v4l2->v4l2_dev, adapter: adap, |
388 | info: &ov2640_info, NULL); |
389 | if (!subdev) |
390 | return -ENODEV; |
391 | |
392 | format.format.code = MEDIA_BUS_FMT_YUYV8_2X8; |
393 | format.format.width = 640; |
394 | format.format.height = 480; |
395 | v4l2_subdev_call(subdev, pad, set_fmt, NULL, &format); |
396 | |
397 | /* NOTE: for UXGA=1600x1200 switch to 12MHz */ |
398 | dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ; |
399 | em28xx_write_reg(dev, EM28XX_R0F_XCLK, val: dev->board.xclk); |
400 | v4l2->vinmode = EM28XX_VINMODE_YUV422_YUYV; |
401 | v4l2->vinctl = 0x00; |
402 | |
403 | break; |
404 | } |
405 | case EM28XX_NOSENSOR: |
406 | default: |
407 | return -EINVAL; |
408 | } |
409 | |
410 | return 0; |
411 | } |
412 | EXPORT_SYMBOL_GPL(em28xx_init_camera); |
413 | |