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Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -03001/*
2 * Driver for MT9T031 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/videodev2.h>
12#include <linux/slab.h>
13#include <linux/i2c.h>
14#include <linux/log2.h>
15
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -030016#include <media/v4l2-subdev.h>
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030017#include <media/v4l2-chip-ident.h>
18#include <media/soc_camera.h>
19
20/* mt9t031 i2c address 0x5d
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -030021 * The platform has to define i2c_board_info and link to it from
22 * struct soc_camera_link */
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030023
24/* mt9t031 selected register addresses */
25#define MT9T031_CHIP_VERSION 0x00
26#define MT9T031_ROW_START 0x01
27#define MT9T031_COLUMN_START 0x02
28#define MT9T031_WINDOW_HEIGHT 0x03
29#define MT9T031_WINDOW_WIDTH 0x04
30#define MT9T031_HORIZONTAL_BLANKING 0x05
31#define MT9T031_VERTICAL_BLANKING 0x06
32#define MT9T031_OUTPUT_CONTROL 0x07
33#define MT9T031_SHUTTER_WIDTH_UPPER 0x08
34#define MT9T031_SHUTTER_WIDTH 0x09
35#define MT9T031_PIXEL_CLOCK_CONTROL 0x0a
36#define MT9T031_FRAME_RESTART 0x0b
37#define MT9T031_SHUTTER_DELAY 0x0c
38#define MT9T031_RESET 0x0d
39#define MT9T031_READ_MODE_1 0x1e
40#define MT9T031_READ_MODE_2 0x20
41#define MT9T031_READ_MODE_3 0x21
42#define MT9T031_ROW_ADDRESS_MODE 0x22
43#define MT9T031_COLUMN_ADDRESS_MODE 0x23
44#define MT9T031_GLOBAL_GAIN 0x35
45#define MT9T031_CHIP_ENABLE 0xF8
46
47#define MT9T031_MAX_HEIGHT 1536
48#define MT9T031_MAX_WIDTH 2048
49#define MT9T031_MIN_HEIGHT 2
50#define MT9T031_MIN_WIDTH 2
51#define MT9T031_HORIZONTAL_BLANK 142
52#define MT9T031_VERTICAL_BLANK 25
53#define MT9T031_COLUMN_SKIP 32
54#define MT9T031_ROW_SKIP 20
55
56#define MT9T031_BUS_PARAM (SOCAM_PCLK_SAMPLE_RISING | \
57 SOCAM_PCLK_SAMPLE_FALLING | SOCAM_HSYNC_ACTIVE_HIGH | \
58 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_HIGH | \
59 SOCAM_MASTER | SOCAM_DATAWIDTH_10)
60
61static const struct soc_camera_data_format mt9t031_colour_formats[] = {
62 {
63 .name = "Bayer (sRGB) 10 bit",
64 .depth = 10,
65 .fourcc = V4L2_PIX_FMT_SGRBG10,
66 .colorspace = V4L2_COLORSPACE_SRGB,
67 }
68};
69
70struct mt9t031 {
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -030071 struct v4l2_subdev subdev;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030072 int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
73 unsigned char autoexposure;
74 u16 xskip;
75 u16 yskip;
76};
77
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -030078static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
79{
80 return container_of(i2c_get_clientdata(client), struct mt9t031, subdev);
81}
82
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -030083static int reg_read(struct i2c_client *client, const u8 reg)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030084{
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030085 s32 data = i2c_smbus_read_word_data(client, reg);
86 return data < 0 ? data : swab16(data);
87}
88
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -030089static int reg_write(struct i2c_client *client, const u8 reg,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030090 const u16 data)
91{
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -030092 return i2c_smbus_write_word_data(client, reg, swab16(data));
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030093}
94
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -030095static int reg_set(struct i2c_client *client, const u8 reg,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -030096 const u16 data)
97{
98 int ret;
99
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300100 ret = reg_read(client, reg);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300101 if (ret < 0)
102 return ret;
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300103 return reg_write(client, reg, ret | data);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300104}
105
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300106static int reg_clear(struct i2c_client *client, const u8 reg,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300107 const u16 data)
108{
109 int ret;
110
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300111 ret = reg_read(client, reg);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300112 if (ret < 0)
113 return ret;
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300114 return reg_write(client, reg, ret & ~data);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300115}
116
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300117static int set_shutter(struct i2c_client *client, const u32 data)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300118{
119 int ret;
120
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300121 ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300122
123 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300124 ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300125
126 return ret;
127}
128
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300129static int get_shutter(struct i2c_client *client, u32 *data)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300130{
131 int ret;
132
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300133 ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300134 *data = ret << 16;
135
136 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300137 ret = reg_read(client, MT9T031_SHUTTER_WIDTH);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300138 *data |= ret & 0xffff;
139
140 return ret < 0 ? ret : 0;
141}
142
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300143static int mt9t031_idle(struct i2c_client *client)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300144{
145 int ret;
146
147 /* Disable chip output, synchronous option update */
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300148 ret = reg_write(client, MT9T031_RESET, 1);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300149 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300150 ret = reg_write(client, MT9T031_RESET, 0);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300151 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300152 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300153
154 return ret >= 0 ? 0 : -EIO;
155}
156
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300157static int mt9t031_disable(struct i2c_client *client)
158{
159 /* Disable the chip */
160 reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
161
162 return 0;
163}
164
165static int mt9t031_init(struct soc_camera_device *icd)
166{
167 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
168
169 return mt9t031_idle(client);
170}
171
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300172static int mt9t031_release(struct soc_camera_device *icd)
173{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300174 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
Guennadi Liakhovetskif9826512009-04-03 10:14:02 -0300175
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300176 return mt9t031_disable(client);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300177}
178
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300179static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300180{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300181 struct i2c_client *client = sd->priv;
182 int ret;
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300183
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300184 if (enable)
185 /* Switch to master "normal" mode */
186 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2);
187 else
188 /* Stop sensor readout */
189 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
190
191 if (ret < 0)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300192 return -EIO;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300193
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300194 return 0;
195}
196
197static int mt9t031_set_bus_param(struct soc_camera_device *icd,
198 unsigned long flags)
199{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300200 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300201
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300202 /* The caller should have queried our parameters, check anyway */
203 if (flags & ~MT9T031_BUS_PARAM)
204 return -EINVAL;
205
206 if (flags & SOCAM_PCLK_SAMPLE_FALLING)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300207 reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
Philippe Rétornazc98afbf2009-03-13 09:42:32 -0300208 else
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300209 reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300210
211 return 0;
212}
213
214static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd)
215{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300216 struct soc_camera_link *icl = to_soc_camera_link(icd);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300217
218 return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM);
219}
220
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300221/* Round up minima and round down maxima */
222static void recalculate_limits(struct soc_camera_device *icd,
223 u16 xskip, u16 yskip)
224{
Guennadi Liakhovetskia0705b02009-08-25 11:46:17 -0300225 icd->rect_max.left = (MT9T031_COLUMN_SKIP + xskip - 1) / xskip;
226 icd->rect_max.top = (MT9T031_ROW_SKIP + yskip - 1) / yskip;
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300227 icd->width_min = (MT9T031_MIN_WIDTH + xskip - 1) / xskip;
228 icd->height_min = (MT9T031_MIN_HEIGHT + yskip - 1) / yskip;
Guennadi Liakhovetskia0705b02009-08-25 11:46:17 -0300229 icd->rect_max.width = MT9T031_MAX_WIDTH / xskip;
230 icd->rect_max.height = MT9T031_MAX_HEIGHT / yskip;
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300231}
232
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300233static int mt9t031_set_params(struct soc_camera_device *icd,
234 struct v4l2_rect *rect, u16 xskip, u16 yskip)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300235{
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300236 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300237 struct mt9t031 *mt9t031 = to_mt9t031(client);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300238 int ret;
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300239 u16 xbin, ybin, width, height, left, top;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300240 const u16 hblank = MT9T031_HORIZONTAL_BLANK,
241 vblank = MT9T031_VERTICAL_BLANK;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300242
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300243 width = rect->width * xskip;
244 height = rect->height * yskip;
245 left = rect->left * xskip;
246 top = rect->top * yskip;
247
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300248 xbin = min(xskip, (u16)3);
249 ybin = min(yskip, (u16)3);
250
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300251 dev_dbg(&client->dev, "xskip %u, width %u/%u, yskip %u, height %u/%u\n",
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300252 xskip, width, rect->width, yskip, height, rect->height);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300253
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300254 /* Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper */
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300255 switch (xbin) {
256 case 2:
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300257 left = (left + 3) & ~3;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300258 break;
259 case 3:
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300260 left = roundup(left, 6);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300261 }
262
263 switch (ybin) {
264 case 2:
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300265 top = (top + 3) & ~3;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300266 break;
267 case 3:
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300268 top = roundup(top, 6);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300269 }
270
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300271 /* Disable register update, reconfigure atomically */
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300272 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1);
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300273 if (ret < 0)
274 return ret;
275
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300276 /* Blanking and start values - default... */
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300277 ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300278 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300279 ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300280
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300281 if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) {
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300282 /* Binning, skipping */
283 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300284 ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300285 ((xbin - 1) << 4) | (xskip - 1));
286 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300287 ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300288 ((ybin - 1) << 4) | (yskip - 1));
289 }
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300290 dev_dbg(&client->dev, "new physical left %u, top %u\n", left, top);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300291
292 /* The caller provides a supported format, as guaranteed by
293 * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */
294 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300295 ret = reg_write(client, MT9T031_COLUMN_START, left);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300296 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300297 ret = reg_write(client, MT9T031_ROW_START, top);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300298 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300299 ret = reg_write(client, MT9T031_WINDOW_WIDTH, width - 1);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300300 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300301 ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300302 height + icd->y_skip_top - 1);
303 if (ret >= 0 && mt9t031->autoexposure) {
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300304 ret = set_shutter(client, height + icd->y_skip_top + vblank);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300305 if (ret >= 0) {
306 const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
307 const struct v4l2_queryctrl *qctrl =
308 soc_camera_find_qctrl(icd->ops,
309 V4L2_CID_EXPOSURE);
310 icd->exposure = (shutter_max / 2 + (height +
311 icd->y_skip_top + vblank - 1) *
312 (qctrl->maximum - qctrl->minimum)) /
313 shutter_max + qctrl->minimum;
314 }
315 }
316
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300317 /* Re-enable register update, commit all changes */
318 if (ret >= 0)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300319 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1);
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300320
321 return ret < 0 ? ret : 0;
322}
323
Guennadi Liakhovetski08590b92009-08-25 11:46:54 -0300324static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300325{
Guennadi Liakhovetski08590b92009-08-25 11:46:54 -0300326 struct v4l2_rect *rect = &a->c;
327 struct i2c_client *client = sd->priv;
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300328 struct mt9t031 *mt9t031 = to_mt9t031(client);
Guennadi Liakhovetski08590b92009-08-25 11:46:54 -0300329 struct soc_camera_device *icd = client->dev.platform_data;
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300330
Guennadi Liakhovetskie3309192009-08-25 11:46:42 -0300331 /* Make sure we don't exceed sensor limits */
332 if (rect->left + rect->width > icd->rect_max.left + icd->rect_max.width)
333 rect->left = icd->rect_max.width + icd->rect_max.left -
334 rect->width;
335
336 if (rect->top + rect->height > icd->rect_max.height + icd->rect_max.top)
337 rect->top = icd->rect_max.height + icd->rect_max.top -
338 rect->height;
339
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300340 /* CROP - no change in scaling, or in limits */
341 return mt9t031_set_params(icd, rect, mt9t031->xskip, mt9t031->yskip);
342}
343
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300344static int mt9t031_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300345{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300346 struct i2c_client *client = sd->priv;
347 struct mt9t031 *mt9t031 = to_mt9t031(client);
348 struct soc_camera_device *icd = client->dev.platform_data;
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300349 int ret;
350 u16 xskip, yskip;
351 struct v4l2_rect rect = {
Guennadi Liakhovetskia0705b02009-08-25 11:46:17 -0300352 .left = icd->rect_current.left,
353 .top = icd->rect_current.top,
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300354 .width = f->fmt.pix.width,
355 .height = f->fmt.pix.height,
356 };
357
358 /*
359 * try_fmt has put rectangle within limits.
360 * S_FMT - use binning and skipping for scaling, recalculate
361 * limits, used for cropping
362 */
363 /* Is this more optimal than just a division? */
364 for (xskip = 8; xskip > 1; xskip--)
365 if (rect.width * xskip <= MT9T031_MAX_WIDTH)
366 break;
367
368 for (yskip = 8; yskip > 1; yskip--)
369 if (rect.height * yskip <= MT9T031_MAX_HEIGHT)
370 break;
371
372 recalculate_limits(icd, xskip, yskip);
373
374 ret = mt9t031_set_params(icd, &rect, xskip, yskip);
375 if (!ret) {
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300376 mt9t031->xskip = xskip;
377 mt9t031->yskip = yskip;
378 }
379
Guennadi Liakhovetski09e231b2009-03-13 06:08:20 -0300380 return ret;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300381}
382
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300383static int mt9t031_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300384{
385 struct v4l2_pix_format *pix = &f->fmt.pix;
386
Trent Piepho653dc592009-05-30 21:45:46 -0300387 v4l_bound_align_image(
388 &pix->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1,
389 &pix->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300390
391 return 0;
392}
393
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300394static int mt9t031_g_chip_ident(struct v4l2_subdev *sd,
395 struct v4l2_dbg_chip_ident *id)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300396{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300397 struct i2c_client *client = sd->priv;
398 struct mt9t031 *mt9t031 = to_mt9t031(client);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300399
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300400 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300401 return -EINVAL;
402
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300403 if (id->match.addr != client->addr)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300404 return -ENODEV;
405
406 id->ident = mt9t031->model;
407 id->revision = 0;
408
409 return 0;
410}
411
412#ifdef CONFIG_VIDEO_ADV_DEBUG
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300413static int mt9t031_g_register(struct v4l2_subdev *sd,
414 struct v4l2_dbg_register *reg)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300415{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300416 struct i2c_client *client = sd->priv;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300417
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300418 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300419 return -EINVAL;
420
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300421 if (reg->match.addr != client->addr)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300422 return -ENODEV;
423
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300424 reg->val = reg_read(client, reg->reg);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300425
426 if (reg->val > 0xffff)
427 return -EIO;
428
429 return 0;
430}
431
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300432static int mt9t031_s_register(struct v4l2_subdev *sd,
433 struct v4l2_dbg_register *reg)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300434{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300435 struct i2c_client *client = sd->priv;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300436
Hans Verkuilaecde8b52008-12-30 07:14:19 -0300437 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300438 return -EINVAL;
439
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300440 if (reg->match.addr != client->addr)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300441 return -ENODEV;
442
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300443 if (reg_write(client, reg->reg, reg->val) < 0)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300444 return -EIO;
445
446 return 0;
447}
448#endif
449
450static const struct v4l2_queryctrl mt9t031_controls[] = {
451 {
452 .id = V4L2_CID_VFLIP,
453 .type = V4L2_CTRL_TYPE_BOOLEAN,
454 .name = "Flip Vertically",
455 .minimum = 0,
456 .maximum = 1,
457 .step = 1,
458 .default_value = 0,
459 }, {
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300460 .id = V4L2_CID_HFLIP,
461 .type = V4L2_CTRL_TYPE_BOOLEAN,
462 .name = "Flip Horizontally",
463 .minimum = 0,
464 .maximum = 1,
465 .step = 1,
466 .default_value = 0,
467 }, {
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300468 .id = V4L2_CID_GAIN,
469 .type = V4L2_CTRL_TYPE_INTEGER,
470 .name = "Gain",
471 .minimum = 0,
472 .maximum = 127,
473 .step = 1,
474 .default_value = 64,
475 .flags = V4L2_CTRL_FLAG_SLIDER,
476 }, {
477 .id = V4L2_CID_EXPOSURE,
478 .type = V4L2_CTRL_TYPE_INTEGER,
479 .name = "Exposure",
480 .minimum = 1,
481 .maximum = 255,
482 .step = 1,
483 .default_value = 255,
484 .flags = V4L2_CTRL_FLAG_SLIDER,
485 }, {
486 .id = V4L2_CID_EXPOSURE_AUTO,
487 .type = V4L2_CTRL_TYPE_BOOLEAN,
488 .name = "Automatic Exposure",
489 .minimum = 0,
490 .maximum = 1,
491 .step = 1,
492 .default_value = 1,
493 }
494};
495
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300496static struct soc_camera_ops mt9t031_ops = {
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300497 .init = mt9t031_init,
498 .release = mt9t031_release,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300499 .set_bus_param = mt9t031_set_bus_param,
500 .query_bus_param = mt9t031_query_bus_param,
501 .controls = mt9t031_controls,
502 .num_controls = ARRAY_SIZE(mt9t031_controls),
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300503};
504
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300505static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300506{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300507 struct i2c_client *client = sd->priv;
508 struct mt9t031 *mt9t031 = to_mt9t031(client);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300509 int data;
510
511 switch (ctrl->id) {
512 case V4L2_CID_VFLIP:
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300513 data = reg_read(client, MT9T031_READ_MODE_2);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300514 if (data < 0)
515 return -EIO;
516 ctrl->value = !!(data & 0x8000);
517 break;
518 case V4L2_CID_HFLIP:
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300519 data = reg_read(client, MT9T031_READ_MODE_2);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300520 if (data < 0)
521 return -EIO;
522 ctrl->value = !!(data & 0x4000);
523 break;
524 case V4L2_CID_EXPOSURE_AUTO:
525 ctrl->value = mt9t031->autoexposure;
526 break;
527 }
528 return 0;
529}
530
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300531static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300532{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300533 struct i2c_client *client = sd->priv;
534 struct mt9t031 *mt9t031 = to_mt9t031(client);
535 struct soc_camera_device *icd = client->dev.platform_data;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300536 const struct v4l2_queryctrl *qctrl;
537 int data;
538
539 qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id);
540
541 if (!qctrl)
542 return -EINVAL;
543
544 switch (ctrl->id) {
545 case V4L2_CID_VFLIP:
546 if (ctrl->value)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300547 data = reg_set(client, MT9T031_READ_MODE_2, 0x8000);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300548 else
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300549 data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300550 if (data < 0)
551 return -EIO;
552 break;
553 case V4L2_CID_HFLIP:
554 if (ctrl->value)
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300555 data = reg_set(client, MT9T031_READ_MODE_2, 0x4000);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300556 else
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300557 data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300558 if (data < 0)
559 return -EIO;
560 break;
561 case V4L2_CID_GAIN:
562 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
563 return -EINVAL;
564 /* See Datasheet Table 7, Gain settings. */
565 if (ctrl->value <= qctrl->default_value) {
566 /* Pack it into 0..1 step 0.125, register values 0..8 */
567 unsigned long range = qctrl->default_value - qctrl->minimum;
568 data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
569
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300570 dev_dbg(&client->dev, "Setting gain %d\n", data);
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300571 data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300572 if (data < 0)
573 return -EIO;
574 } else {
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300575 /* Pack it into 1.125..128 variable step, register values 9..0x7860 */
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300576 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
577 unsigned long range = qctrl->maximum - qctrl->default_value - 1;
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300578 /* calculated gain: map 65..127 to 9..1024 step 0.125 */
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300579 unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300580 1015 + range / 2) / range + 9;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300581
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300582 if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300583 data = gain;
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300584 else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300585 data = ((gain - 32) * 16 + 16) / 32 + 80;
586 else
Guennadi Liakhovetski70e1d352009-02-23 12:13:23 -0300587 /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
588 data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300589
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300590 dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n",
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300591 reg_read(client, MT9T031_GLOBAL_GAIN), data);
592 data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300593 if (data < 0)
594 return -EIO;
595 }
596
597 /* Success */
598 icd->gain = ctrl->value;
599 break;
600 case V4L2_CID_EXPOSURE:
601 /* mt9t031 has maximum == default */
602 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
603 return -EINVAL;
604 else {
605 const unsigned long range = qctrl->maximum - qctrl->minimum;
606 const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 +
607 range / 2) / range + 1;
608 u32 old;
609
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300610 get_shutter(client, &old);
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300611 dev_dbg(&client->dev, "Set shutter from %u to %u\n",
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300612 old, shutter);
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300613 if (set_shutter(client, shutter) < 0)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300614 return -EIO;
615 icd->exposure = ctrl->value;
616 mt9t031->autoexposure = 0;
617 }
618 break;
619 case V4L2_CID_EXPOSURE_AUTO:
620 if (ctrl->value) {
621 const u16 vblank = MT9T031_VERTICAL_BLANK;
622 const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
Guennadi Liakhovetskia0705b02009-08-25 11:46:17 -0300623 if (set_shutter(client, icd->rect_current.height +
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300624 icd->y_skip_top + vblank) < 0)
625 return -EIO;
626 qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
Guennadi Liakhovetskia0705b02009-08-25 11:46:17 -0300627 icd->exposure = (shutter_max / 2 +
628 (icd->rect_current.height +
629 icd->y_skip_top + vblank - 1) *
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300630 (qctrl->maximum - qctrl->minimum)) /
631 shutter_max + qctrl->minimum;
632 mt9t031->autoexposure = 1;
633 } else
634 mt9t031->autoexposure = 0;
635 break;
636 }
637 return 0;
638}
639
640/* Interface active, can use i2c. If it fails, it can indeed mean, that
641 * this wasn't our capture interface, so, we wait for the right one */
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300642static int mt9t031_video_probe(struct i2c_client *client)
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300643{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300644 struct soc_camera_device *icd = client->dev.platform_data;
645 struct mt9t031 *mt9t031 = to_mt9t031(client);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300646 s32 data;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300647
648 /* We must have a parent by now. And it cannot be a wrong one.
649 * So this entire test is completely redundant. */
650 if (!icd->dev.parent ||
651 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
652 return -ENODEV;
653
654 /* Enable the chip */
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300655 data = reg_write(client, MT9T031_CHIP_ENABLE, 1);
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300656 dev_dbg(&client->dev, "write: %d\n", data);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300657
658 /* Read out the chip version register */
Guennadi Liakhovetski9538e1c2009-04-24 12:57:01 -0300659 data = reg_read(client, MT9T031_CHIP_VERSION);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300660
661 switch (data) {
662 case 0x1621:
663 mt9t031->model = V4L2_IDENT_MT9T031;
664 icd->formats = mt9t031_colour_formats;
665 icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats);
666 break;
667 default:
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300668 dev_err(&client->dev,
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300669 "No MT9T031 chip detected, register read %x\n", data);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300670 return -ENODEV;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300671 }
672
Guennadi Liakhovetski85f8be62009-08-25 11:47:00 -0300673 dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300674
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300675 return 0;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300676}
677
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300678static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
679 .g_ctrl = mt9t031_g_ctrl,
680 .s_ctrl = mt9t031_s_ctrl,
681 .g_chip_ident = mt9t031_g_chip_ident,
682#ifdef CONFIG_VIDEO_ADV_DEBUG
683 .g_register = mt9t031_g_register,
684 .s_register = mt9t031_s_register,
685#endif
686};
687
688static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = {
689 .s_stream = mt9t031_s_stream,
690 .s_fmt = mt9t031_s_fmt,
691 .try_fmt = mt9t031_try_fmt,
Guennadi Liakhovetski08590b92009-08-25 11:46:54 -0300692 .s_crop = mt9t031_s_crop,
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300693};
694
695static struct v4l2_subdev_ops mt9t031_subdev_ops = {
696 .core = &mt9t031_subdev_core_ops,
697 .video = &mt9t031_subdev_video_ops,
698};
699
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300700static int mt9t031_probe(struct i2c_client *client,
701 const struct i2c_device_id *did)
702{
703 struct mt9t031 *mt9t031;
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300704 struct soc_camera_device *icd = client->dev.platform_data;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300705 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300706 struct soc_camera_link *icl;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300707 int ret;
708
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300709 if (!icd) {
710 dev_err(&client->dev, "MT9T031: missing soc-camera data!\n");
711 return -EINVAL;
712 }
713
714 icl = to_soc_camera_link(icd);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300715 if (!icl) {
716 dev_err(&client->dev, "MT9T031 driver needs platform data\n");
717 return -EINVAL;
718 }
719
720 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
721 dev_warn(&adapter->dev,
722 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
723 return -EIO;
724 }
725
726 mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL);
727 if (!mt9t031)
728 return -ENOMEM;
729
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300730 v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300731
732 /* Second stage probe - when a capture adapter is there */
Guennadi Liakhovetskia0705b02009-08-25 11:46:17 -0300733 icd->ops = &mt9t031_ops;
734 icd->rect_max.left = MT9T031_COLUMN_SKIP;
735 icd->rect_max.top = MT9T031_ROW_SKIP;
736 icd->rect_current.left = icd->rect_max.left;
737 icd->rect_current.top = icd->rect_max.top;
738 icd->width_min = MT9T031_MIN_WIDTH;
739 icd->rect_max.width = MT9T031_MAX_WIDTH;
740 icd->height_min = MT9T031_MIN_HEIGHT;
741 icd->rect_max.height = MT9T031_MAX_HEIGHT;
742 icd->y_skip_top = 0;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300743 /* Simulated autoexposure. If enabled, we calculate shutter width
744 * ourselves in the driver based on vertical blanking and frame width */
745 mt9t031->autoexposure = 1;
746
747 mt9t031->xskip = 1;
748 mt9t031->yskip = 1;
749
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300750 mt9t031_idle(client);
751
752 ret = mt9t031_video_probe(client);
753
754 mt9t031_disable(client);
755
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300756 if (ret) {
757 icd->ops = NULL;
758 i2c_set_clientdata(client, NULL);
759 kfree(mt9t031);
760 }
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300761
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300762 return ret;
763}
764
765static int mt9t031_remove(struct i2c_client *client)
766{
Guennadi Liakhovetski979ea1d2009-08-25 11:43:33 -0300767 struct mt9t031 *mt9t031 = to_mt9t031(client);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300768 struct soc_camera_device *icd = client->dev.platform_data;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300769
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300770 icd->ops = NULL;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300771 i2c_set_clientdata(client, NULL);
Guennadi Liakhovetski40e2e092009-08-25 11:28:22 -0300772 client->driver = NULL;
Guennadi Liakhovetski4e96fd02008-12-29 06:04:59 -0300773 kfree(mt9t031);
774
775 return 0;
776}
777
778static const struct i2c_device_id mt9t031_id[] = {
779 { "mt9t031", 0 },
780 { }
781};
782MODULE_DEVICE_TABLE(i2c, mt9t031_id);
783
784static struct i2c_driver mt9t031_i2c_driver = {
785 .driver = {
786 .name = "mt9t031",
787 },
788 .probe = mt9t031_probe,
789 .remove = mt9t031_remove,
790 .id_table = mt9t031_id,
791};
792
793static int __init mt9t031_mod_init(void)
794{
795 return i2c_add_driver(&mt9t031_i2c_driver);
796}
797
798static void __exit mt9t031_mod_exit(void)
799{
800 i2c_del_driver(&mt9t031_i2c_driver);
801}
802
803module_init(mt9t031_mod_init);
804module_exit(mt9t031_mod_exit);
805
806MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
807MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
808MODULE_LICENSE("GPL v2");