tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Driver for IMX074 CMOS Image Sensor from Sony
3 *
4 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 *
6 * Partially inspired by the IMX074 driver from the Android / MSM tree
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/delay.h>
14#include <linux/i2c.h>
15#include <linux/v4l2-mediabus.h>
16#include <linux/slab.h>
17#include <linux/videodev2.h>
18#include <linux/module.h>
19
20#include <media/soc_camera.h>
21#include <media/v4l2-subdev.h>
22#include <media/v4l2-chip-ident.h>
23
24/* IMX074 registers */
25
26#define MODE_SELECT 0x0100
27#define IMAGE_ORIENTATION 0x0101
28#define GROUPED_PARAMETER_HOLD 0x0104
29
30/* Integration Time */
31#define COARSE_INTEGRATION_TIME_HI 0x0202
32#define COARSE_INTEGRATION_TIME_LO 0x0203
33/* Gain */
34#define ANALOGUE_GAIN_CODE_GLOBAL_HI 0x0204
35#define ANALOGUE_GAIN_CODE_GLOBAL_LO 0x0205
36
37/* PLL registers */
38#define PRE_PLL_CLK_DIV 0x0305
39#define PLL_MULTIPLIER 0x0307
40#define PLSTATIM 0x302b
41#define VNDMY_ABLMGSHLMT 0x300a
42#define Y_OPBADDR_START_DI 0x3014
43/* mode setting */
44#define FRAME_LENGTH_LINES_HI 0x0340
45#define FRAME_LENGTH_LINES_LO 0x0341
46#define LINE_LENGTH_PCK_HI 0x0342
47#define LINE_LENGTH_PCK_LO 0x0343
48#define YADDR_START 0x0347
49#define YADDR_END 0x034b
50#define X_OUTPUT_SIZE_MSB 0x034c
51#define X_OUTPUT_SIZE_LSB 0x034d
52#define Y_OUTPUT_SIZE_MSB 0x034e
53#define Y_OUTPUT_SIZE_LSB 0x034f
54#define X_EVEN_INC 0x0381
55#define X_ODD_INC 0x0383
56#define Y_EVEN_INC 0x0385
57#define Y_ODD_INC 0x0387
58
59#define HMODEADD 0x3001
60#define VMODEADD 0x3016
61#define VAPPLINE_START 0x3069
62#define VAPPLINE_END 0x306b
63#define SHUTTER 0x3086
64#define HADDAVE 0x30e8
65#define LANESEL 0x3301
66
67/* IMX074 supported geometry */
68#define IMX074_WIDTH 1052
69#define IMX074_HEIGHT 780
70
71/* IMX074 has only one fixed colorspace per pixelcode */
72struct imx074_datafmt {
73 enum v4l2_mbus_pixelcode code;
74 enum v4l2_colorspace colorspace;
75};
76
77struct imx074 {
78 struct v4l2_subdev subdev;
79 const struct imx074_datafmt *fmt;
80};
81
82static const struct imx074_datafmt imx074_colour_fmts[] = {
83 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
84};
85
86static struct imx074 *to_imx074(const struct i2c_client *client)
87{
88 return container_of(i2c_get_clientdata(client), struct imx074, subdev);
89}
90
91/* Find a data format by a pixel code in an array */
92static const struct imx074_datafmt *imx074_find_datafmt(enum v4l2_mbus_pixelcode code)
93{
94 int i;
95
96 for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
97 if (imx074_colour_fmts[i].code == code)
98 return imx074_colour_fmts + i;
99
100 return NULL;
101}
102
103static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
104{
105 struct i2c_adapter *adap = client->adapter;
106 struct i2c_msg msg;
107 unsigned char tx[3];
108 int ret;
109
110 msg.addr = client->addr;
111 msg.buf = tx;
112 msg.len = 3;
113 msg.flags = 0;
114
115 tx[0] = addr >> 8;
116 tx[1] = addr & 0xff;
117 tx[2] = data;
118
119 ret = i2c_transfer(adap, &msg, 1);
120
121 mdelay(2);
122
123 return ret == 1 ? 0 : -EIO;
124}
125
126static int reg_read(struct i2c_client *client, const u16 addr)
127{
128 u8 buf[2] = {addr >> 8, addr & 0xff};
129 int ret;
130 struct i2c_msg msgs[] = {
131 {
132 .addr = client->addr,
133 .flags = 0,
134 .len = 2,
135 .buf = buf,
136 }, {
137 .addr = client->addr,
138 .flags = I2C_M_RD,
139 .len = 2,
140 .buf = buf,
141 },
142 };
143
144 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
145 if (ret < 0) {
146 dev_warn(&client->dev, "Reading register %x from %x failed\n",
147 addr, client->addr);
148 return ret;
149 }
150
151 return buf[0] & 0xff; /* no sign-extension */
152}
153
154static int imx074_try_fmt(struct v4l2_subdev *sd,
155 struct v4l2_mbus_framefmt *mf)
156{
157 const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);
158
159 dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
160
161 if (!fmt) {
162 mf->code = imx074_colour_fmts[0].code;
163 mf->colorspace = imx074_colour_fmts[0].colorspace;
164 }
165
166 mf->width = IMX074_WIDTH;
167 mf->height = IMX074_HEIGHT;
168 mf->field = V4L2_FIELD_NONE;
169
170 return 0;
171}
172
173static int imx074_s_fmt(struct v4l2_subdev *sd,
174 struct v4l2_mbus_framefmt *mf)
175{
176 struct i2c_client *client = v4l2_get_subdevdata(sd);
177 struct imx074 *priv = to_imx074(client);
178
179 dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
180
181 /* MIPI CSI could have changed the format, double-check */
182 if (!imx074_find_datafmt(mf->code))
183 return -EINVAL;
184
185 imx074_try_fmt(sd, mf);
186
187 priv->fmt = imx074_find_datafmt(mf->code);
188
189 return 0;
190}
191
192static int imx074_g_fmt(struct v4l2_subdev *sd,
193 struct v4l2_mbus_framefmt *mf)
194{
195 struct i2c_client *client = v4l2_get_subdevdata(sd);
196 struct imx074 *priv = to_imx074(client);
197
198 const struct imx074_datafmt *fmt = priv->fmt;
199
200 mf->code = fmt->code;
201 mf->colorspace = fmt->colorspace;
202 mf->width = IMX074_WIDTH;
203 mf->height = IMX074_HEIGHT;
204 mf->field = V4L2_FIELD_NONE;
205
206 return 0;
207}
208
209static int imx074_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
210{
211 struct v4l2_rect *rect = &a->c;
212
213 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
214 rect->top = 0;
215 rect->left = 0;
216 rect->width = IMX074_WIDTH;
217 rect->height = IMX074_HEIGHT;
218
219 return 0;
220}
221
222static int imx074_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
223{
224 a->bounds.left = 0;
225 a->bounds.top = 0;
226 a->bounds.width = IMX074_WIDTH;
227 a->bounds.height = IMX074_HEIGHT;
228 a->defrect = a->bounds;
229 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
230 a->pixelaspect.numerator = 1;
231 a->pixelaspect.denominator = 1;
232
233 return 0;
234}
235
236static int imx074_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
237 enum v4l2_mbus_pixelcode *code)
238{
239 if ((unsigned int)index >= ARRAY_SIZE(imx074_colour_fmts))
240 return -EINVAL;
241
242 *code = imx074_colour_fmts[index].code;
243 return 0;
244}
245
246static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
247{
248 struct i2c_client *client = v4l2_get_subdevdata(sd);
249
250 /* MODE_SELECT: stream or standby */
251 return reg_write(client, MODE_SELECT, !!enable);
252}
253
254static int imx074_g_chip_ident(struct v4l2_subdev *sd,
255 struct v4l2_dbg_chip_ident *id)
256{
257 struct i2c_client *client = v4l2_get_subdevdata(sd);
258
259 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
260 return -EINVAL;
261
262 if (id->match.addr != client->addr)
263 return -ENODEV;
264
265 id->ident = V4L2_IDENT_IMX074;
266 id->revision = 0;
267
268 return 0;
269}
270
271static int imx074_g_mbus_config(struct v4l2_subdev *sd,
272 struct v4l2_mbus_config *cfg)
273{
274 cfg->type = V4L2_MBUS_CSI2;
275 cfg->flags = V4L2_MBUS_CSI2_2_LANE |
276 V4L2_MBUS_CSI2_CHANNEL_0 |
277 V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
278
279 return 0;
280}
281
282static struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
283 .s_stream = imx074_s_stream,
284 .s_mbus_fmt = imx074_s_fmt,
285 .g_mbus_fmt = imx074_g_fmt,
286 .try_mbus_fmt = imx074_try_fmt,
287 .enum_mbus_fmt = imx074_enum_fmt,
288 .g_crop = imx074_g_crop,
289 .cropcap = imx074_cropcap,
290 .g_mbus_config = imx074_g_mbus_config,
291};
292
293static struct v4l2_subdev_core_ops imx074_subdev_core_ops = {
294 .g_chip_ident = imx074_g_chip_ident,
295};
296
297static struct v4l2_subdev_ops imx074_subdev_ops = {
298 .core = &imx074_subdev_core_ops,
299 .video = &imx074_subdev_video_ops,
300};
301
302static int imx074_video_probe(struct i2c_client *client)
303{
304 int ret;
305 u16 id;
306
307 /* Read sensor Model ID */
308 ret = reg_read(client, 0);
309 if (ret < 0)
310 return ret;
311
312 id = ret << 8;
313
314 ret = reg_read(client, 1);
315 if (ret < 0)
316 return ret;
317
318 id |= ret;
319
320 dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
321
322 if (id != 0x74)
323 return -ENODEV;
324
325 /* PLL Setting EXTCLK=24MHz, 22.5times */
326 reg_write(client, PLL_MULTIPLIER, 0x2D);
327 reg_write(client, PRE_PLL_CLK_DIV, 0x02);
328 reg_write(client, PLSTATIM, 0x4B);
329
330 /* 2-lane mode */
331 reg_write(client, 0x3024, 0x00);
332
333 reg_write(client, IMAGE_ORIENTATION, 0x00);
334
335 /* select RAW mode:
336 * 0x08+0x08 = top 8 bits
337 * 0x0a+0x08 = compressed 8-bits
338 * 0x0a+0x0a = 10 bits
339 */
340 reg_write(client, 0x0112, 0x08);
341 reg_write(client, 0x0113, 0x08);
342
343 /* Base setting for High frame mode */
344 reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
345 reg_write(client, Y_OPBADDR_START_DI, 0x08);
346 reg_write(client, 0x3015, 0x37);
347 reg_write(client, 0x301C, 0x01);
348 reg_write(client, 0x302C, 0x05);
349 reg_write(client, 0x3031, 0x26);
350 reg_write(client, 0x3041, 0x60);
351 reg_write(client, 0x3051, 0x24);
352 reg_write(client, 0x3053, 0x34);
353 reg_write(client, 0x3057, 0xC0);
354 reg_write(client, 0x305C, 0x09);
355 reg_write(client, 0x305D, 0x07);
356 reg_write(client, 0x3060, 0x30);
357 reg_write(client, 0x3065, 0x00);
358 reg_write(client, 0x30AA, 0x08);
359 reg_write(client, 0x30AB, 0x1C);
360 reg_write(client, 0x30B0, 0x32);
361 reg_write(client, 0x30B2, 0x83);
362 reg_write(client, 0x30D3, 0x04);
363 reg_write(client, 0x3106, 0x78);
364 reg_write(client, 0x310C, 0x82);
365 reg_write(client, 0x3304, 0x05);
366 reg_write(client, 0x3305, 0x04);
367 reg_write(client, 0x3306, 0x11);
368 reg_write(client, 0x3307, 0x02);
369 reg_write(client, 0x3308, 0x0C);
370 reg_write(client, 0x3309, 0x06);
371 reg_write(client, 0x330A, 0x08);
372 reg_write(client, 0x330B, 0x04);
373 reg_write(client, 0x330C, 0x08);
374 reg_write(client, 0x330D, 0x06);
375 reg_write(client, 0x330E, 0x01);
376 reg_write(client, 0x3381, 0x00);
377
378 /* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
379 /* 1608 = 1560 + 48 (black lines) */
380 reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
381 reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
382 reg_write(client, YADDR_START, 0x00);
383 reg_write(client, YADDR_END, 0x2F);
384 /* 0x838 == 2104 */
385 reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
386 reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
387 /* 0x618 == 1560 */
388 reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
389 reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
390 reg_write(client, X_EVEN_INC, 0x01);
391 reg_write(client, X_ODD_INC, 0x03);
392 reg_write(client, Y_EVEN_INC, 0x01);
393 reg_write(client, Y_ODD_INC, 0x03);
394 reg_write(client, HMODEADD, 0x00);
395 reg_write(client, VMODEADD, 0x16);
396 reg_write(client, VAPPLINE_START, 0x24);
397 reg_write(client, VAPPLINE_END, 0x53);
398 reg_write(client, SHUTTER, 0x00);
399 reg_write(client, HADDAVE, 0x80);
400
401 reg_write(client, LANESEL, 0x00);
402
403 reg_write(client, GROUPED_PARAMETER_HOLD, 0x00); /* off */
404
405 return 0;
406}
407
408static int imx074_probe(struct i2c_client *client,
409 const struct i2c_device_id *did)
410{
411 struct imx074 *priv;
412 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
413 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
414 int ret;
415
416 if (!icl) {
417 dev_err(&client->dev, "IMX074: missing platform data!\n");
418 return -EINVAL;
419 }
420
421 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
422 dev_warn(&adapter->dev,
423 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
424 return -EIO;
425 }
426
427 priv = kzalloc(sizeof(struct imx074), GFP_KERNEL);
428 if (!priv)
429 return -ENOMEM;
430
431 v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);
432
433 priv->fmt = &imx074_colour_fmts[0];
434
435 ret = imx074_video_probe(client);
436 if (ret < 0) {
437 kfree(priv);
438 return ret;
439 }
440
441 return ret;
442}
443
444static int imx074_remove(struct i2c_client *client)
445{
446 struct imx074 *priv = to_imx074(client);
447 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
448
449 if (icl->free_bus)
450 icl->free_bus(icl);
451 kfree(priv);
452
453 return 0;
454}
455
456static const struct i2c_device_id imx074_id[] = {
457 { "imx074", 0 },
458 { }
459};
460MODULE_DEVICE_TABLE(i2c, imx074_id);
461
462static struct i2c_driver imx074_i2c_driver = {
463 .driver = {
464 .name = "imx074",
465 },
466 .probe = imx074_probe,
467 .remove = imx074_remove,
468 .id_table = imx074_id,
469};
470
471module_i2c_driver(imx074_i2c_driver);
472
473MODULE_DESCRIPTION("Sony IMX074 Camera driver");
474MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
475MODULE_LICENSE("GPL v2");