1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
4 * Copyright (C) 2014-2017 Mentor Graphics Inc.
5 */
6
7 #include <linux/clk.h>
8 #include <linux/clk-provider.h>
9 #include <linux/clkdev.h>
10 #include <linux/ctype.h>
11 #include <linux/delay.h>
12 #include <linux/device.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/i2c.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/of_device.h>
18 #include <linux/regulator/consumer.h>
19 #include <linux/slab.h>
20 #include <linux/types.h>
21 #include <media/v4l2-async.h>
22 #include <media/v4l2-ctrls.h>
23 #include <media/v4l2-device.h>
24 #include <media/v4l2-event.h>
25 #include <media/v4l2-fwnode.h>
26 #include <media/v4l2-subdev.h>
27
28 /* min/typical/max system clock (xclk) frequencies */
29 #define OV5640_XCLK_MIN 6000000
30 #define OV5640_XCLK_MAX 54000000
31
32 #define OV5640_DEFAULT_SLAVE_ID 0x3c
33
34 #define OV5640_REG_SYS_RESET02 0x3002
35 #define OV5640_REG_SYS_CLOCK_ENABLE02 0x3006
36 #define OV5640_REG_SYS_CTRL0 0x3008
37 #define OV5640_REG_SYS_CTRL0_SW_PWDN 0x42
38 #define OV5640_REG_SYS_CTRL0_SW_PWUP 0x02
39 #define OV5640_REG_CHIP_ID 0x300a
40 #define OV5640_REG_IO_MIPI_CTRL00 0x300e
41 #define OV5640_REG_PAD_OUTPUT_ENABLE01 0x3017
42 #define OV5640_REG_PAD_OUTPUT_ENABLE02 0x3018
43 #define OV5640_REG_PAD_OUTPUT00 0x3019
44 #define OV5640_REG_SYSTEM_CONTROL1 0x302e
45 #define OV5640_REG_SC_PLL_CTRL0 0x3034
46 #define OV5640_REG_SC_PLL_CTRL1 0x3035
47 #define OV5640_REG_SC_PLL_CTRL2 0x3036
48 #define OV5640_REG_SC_PLL_CTRL3 0x3037
49 #define OV5640_REG_SLAVE_ID 0x3100
50 #define OV5640_REG_SCCB_SYS_CTRL1 0x3103
51 #define OV5640_REG_SYS_ROOT_DIVIDER 0x3108
52 #define OV5640_REG_AWB_R_GAIN 0x3400
53 #define OV5640_REG_AWB_G_GAIN 0x3402
54 #define OV5640_REG_AWB_B_GAIN 0x3404
55 #define OV5640_REG_AWB_MANUAL_CTRL 0x3406
56 #define OV5640_REG_AEC_PK_EXPOSURE_HI 0x3500
57 #define OV5640_REG_AEC_PK_EXPOSURE_MED 0x3501
58 #define OV5640_REG_AEC_PK_EXPOSURE_LO 0x3502
59 #define OV5640_REG_AEC_PK_MANUAL 0x3503
60 #define OV5640_REG_AEC_PK_REAL_GAIN 0x350a
61 #define OV5640_REG_AEC_PK_VTS 0x350c
62 #define OV5640_REG_TIMING_DVPHO 0x3808
63 #define OV5640_REG_TIMING_DVPVO 0x380a
64 #define OV5640_REG_TIMING_HTS 0x380c
65 #define OV5640_REG_TIMING_VTS 0x380e
66 #define OV5640_REG_TIMING_TC_REG20 0x3820
67 #define OV5640_REG_TIMING_TC_REG21 0x3821
68 #define OV5640_REG_AEC_CTRL00 0x3a00
69 #define OV5640_REG_AEC_B50_STEP 0x3a08
70 #define OV5640_REG_AEC_B60_STEP 0x3a0a
71 #define OV5640_REG_AEC_CTRL0D 0x3a0d
72 #define OV5640_REG_AEC_CTRL0E 0x3a0e
73 #define OV5640_REG_AEC_CTRL0F 0x3a0f
74 #define OV5640_REG_AEC_CTRL10 0x3a10
75 #define OV5640_REG_AEC_CTRL11 0x3a11
76 #define OV5640_REG_AEC_CTRL1B 0x3a1b
77 #define OV5640_REG_AEC_CTRL1E 0x3a1e
78 #define OV5640_REG_AEC_CTRL1F 0x3a1f
79 #define OV5640_REG_HZ5060_CTRL00 0x3c00
80 #define OV5640_REG_HZ5060_CTRL01 0x3c01
81 #define OV5640_REG_SIGMADELTA_CTRL0C 0x3c0c
82 #define OV5640_REG_FRAME_CTRL01 0x4202
83 #define OV5640_REG_FORMAT_CONTROL00 0x4300
84 #define OV5640_REG_VFIFO_HSIZE 0x4602
85 #define OV5640_REG_VFIFO_VSIZE 0x4604
86 #define OV5640_REG_JPG_MODE_SELECT 0x4713
87 #define OV5640_REG_CCIR656_CTRL00 0x4730
88 #define OV5640_REG_POLARITY_CTRL00 0x4740
89 #define OV5640_REG_MIPI_CTRL00 0x4800
90 #define OV5640_REG_DEBUG_MODE 0x4814
91 #define OV5640_REG_ISP_FORMAT_MUX_CTRL 0x501f
92 #define OV5640_REG_PRE_ISP_TEST_SET1 0x503d
93 #define OV5640_REG_SDE_CTRL0 0x5580
94 #define OV5640_REG_SDE_CTRL1 0x5581
95 #define OV5640_REG_SDE_CTRL3 0x5583
96 #define OV5640_REG_SDE_CTRL4 0x5584
97 #define OV5640_REG_SDE_CTRL5 0x5585
98 #define OV5640_REG_AVG_READOUT 0x56a1
99
100 enum ov5640_mode_id {
101 OV5640_MODE_QCIF_176_144 = 0,
102 OV5640_MODE_QVGA_320_240,
103 OV5640_MODE_VGA_640_480,
104 OV5640_MODE_NTSC_720_480,
105 OV5640_MODE_PAL_720_576,
106 OV5640_MODE_XGA_1024_768,
107 OV5640_MODE_720P_1280_720,
108 OV5640_MODE_1080P_1920_1080,
109 OV5640_MODE_QSXGA_2592_1944,
110 OV5640_NUM_MODES,
111 };
112
113 enum ov5640_frame_rate {
114 OV5640_15_FPS = 0,
115 OV5640_30_FPS,
116 OV5640_60_FPS,
117 OV5640_NUM_FRAMERATES,
118 };
119
120 enum ov5640_format_mux {
121 OV5640_FMT_MUX_YUV422 = 0,
122 OV5640_FMT_MUX_RGB,
123 OV5640_FMT_MUX_DITHER,
124 OV5640_FMT_MUX_RAW_DPC,
125 OV5640_FMT_MUX_SNR_RAW,
126 OV5640_FMT_MUX_RAW_CIP,
127 };
128
129 struct ov5640_pixfmt {
130 u32 code;
131 u32 colorspace;
132 };
133
134 static const struct ov5640_pixfmt ov5640_formats[] = {
135 { MEDIA_BUS_FMT_JPEG_1X8, V4L2_COLORSPACE_JPEG, },
136 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_SRGB, },
137 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_SRGB, },
138 { MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB, },
139 { MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB, },
140 { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB, },
141 { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_COLORSPACE_SRGB, },
142 { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_COLORSPACE_SRGB, },
143 { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_COLORSPACE_SRGB, },
144 };
145
146 /*
147 * FIXME: remove this when a subdev API becomes available
148 * to set the MIPI CSI-2 virtual channel.
149 */
150 static unsigned int virtual_channel;
151 module_param(virtual_channel, uint, 0444);
152 MODULE_PARM_DESC(virtual_channel,
153 "MIPI CSI-2 virtual channel (0..3), default 0");
154
155 static const int ov5640_framerates[] = {
156 [OV5640_15_FPS] = 15,
157 [OV5640_30_FPS] = 30,
158 [OV5640_60_FPS] = 60,
159 };
160
161 /* regulator supplies */
162 static const char * const ov5640_supply_name[] = {
163 "DOVDD", /* Digital I/O (1.8V) supply */
164 "AVDD", /* Analog (2.8V) supply */
165 "DVDD", /* Digital Core (1.5V) supply */
166 };
167
168 #define OV5640_NUM_SUPPLIES ARRAY_SIZE(ov5640_supply_name)
169
170 /*
171 * Image size under 1280 * 960 are SUBSAMPLING
172 * Image size upper 1280 * 960 are SCALING
173 */
174 enum ov5640_downsize_mode {
175 SUBSAMPLING,
176 SCALING,
177 };
178
179 struct reg_value {
180 u16 reg_addr;
181 u8 val;
182 u8 mask;
183 u32 delay_ms;
184 };
185
186 struct ov5640_mode_info {
187 enum ov5640_mode_id id;
188 enum ov5640_downsize_mode dn_mode;
189 u32 hact;
190 u32 htot;
191 u32 vact;
192 u32 vtot;
193 const struct reg_value *reg_data;
194 u32 reg_data_size;
195 u32 max_fps;
196 };
197
198 struct ov5640_ctrls {
199 struct v4l2_ctrl_handler handler;
200 struct v4l2_ctrl *pixel_rate;
201 struct {
202 struct v4l2_ctrl *auto_exp;
203 struct v4l2_ctrl *exposure;
204 };
205 struct {
206 struct v4l2_ctrl *auto_wb;
207 struct v4l2_ctrl *blue_balance;
208 struct v4l2_ctrl *red_balance;
209 };
210 struct {
211 struct v4l2_ctrl *auto_gain;
212 struct v4l2_ctrl *gain;
213 };
214 struct v4l2_ctrl *brightness;
215 struct v4l2_ctrl *light_freq;
216 struct v4l2_ctrl *saturation;
217 struct v4l2_ctrl *contrast;
218 struct v4l2_ctrl *hue;
219 struct v4l2_ctrl *test_pattern;
220 struct v4l2_ctrl *hflip;
221 struct v4l2_ctrl *vflip;
222 };
223
224 struct ov5640_dev {
225 struct i2c_client *i2c_client;
226 struct v4l2_subdev sd;
227 struct media_pad pad;
228 struct v4l2_fwnode_endpoint ep; /* the parsed DT endpoint info */
229 struct clk *xclk; /* system clock to OV5640 */
230 u32 xclk_freq;
231
232 struct regulator_bulk_data supplies[OV5640_NUM_SUPPLIES];
233 struct gpio_desc *reset_gpio;
234 struct gpio_desc *pwdn_gpio;
235 bool upside_down;
236
237 /* lock to protect all members below */
238 struct mutex lock;
239
240 int power_count;
241
242 struct v4l2_mbus_framefmt fmt;
243 bool pending_fmt_change;
244
245 const struct ov5640_mode_info *current_mode;
246 const struct ov5640_mode_info *last_mode;
247 enum ov5640_frame_rate current_fr;
248 struct v4l2_fract frame_interval;
249
250 struct ov5640_ctrls ctrls;
251
252 u32 prev_sysclk, prev_hts;
253 u32 ae_low, ae_high, ae_target;
254
255 bool pending_mode_change;
256 bool streaming;
257 };
258
to_ov5640_dev(struct v4l2_subdev * sd)259 static inline struct ov5640_dev *to_ov5640_dev(struct v4l2_subdev *sd)
260 {
261 return container_of(sd, struct ov5640_dev, sd);
262 }
263
ctrl_to_sd(struct v4l2_ctrl * ctrl)264 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
265 {
266 return &container_of(ctrl->handler, struct ov5640_dev,
267 ctrls.handler)->sd;
268 }
269
270 /*
271 * FIXME: all of these register tables are likely filled with
272 * entries that set the register to their power-on default values,
273 * and which are otherwise not touched by this driver. Those entries
274 * should be identified and removed to speed register load time
275 * over i2c.
276 */
277 /* YUV422 UYVY VGA@30fps */
278 static const struct reg_value ov5640_init_setting_30fps_VGA[] = {
279 {0x3103, 0x11, 0, 0}, {0x3008, 0x82, 0, 5}, {0x3008, 0x42, 0, 0},
280 {0x3103, 0x03, 0, 0}, {0x3630, 0x36, 0, 0},
281 {0x3631, 0x0e, 0, 0}, {0x3632, 0xe2, 0, 0}, {0x3633, 0x12, 0, 0},
282 {0x3621, 0xe0, 0, 0}, {0x3704, 0xa0, 0, 0}, {0x3703, 0x5a, 0, 0},
283 {0x3715, 0x78, 0, 0}, {0x3717, 0x01, 0, 0}, {0x370b, 0x60, 0, 0},
284 {0x3705, 0x1a, 0, 0}, {0x3905, 0x02, 0, 0}, {0x3906, 0x10, 0, 0},
285 {0x3901, 0x0a, 0, 0}, {0x3731, 0x12, 0, 0}, {0x3600, 0x08, 0, 0},
286 {0x3601, 0x33, 0, 0}, {0x302d, 0x60, 0, 0}, {0x3620, 0x52, 0, 0},
287 {0x371b, 0x20, 0, 0}, {0x471c, 0x50, 0, 0}, {0x3a13, 0x43, 0, 0},
288 {0x3a18, 0x00, 0, 0}, {0x3a19, 0xf8, 0, 0}, {0x3635, 0x13, 0, 0},
289 {0x3636, 0x03, 0, 0}, {0x3634, 0x40, 0, 0}, {0x3622, 0x01, 0, 0},
290 {0x3c01, 0xa4, 0, 0}, {0x3c04, 0x28, 0, 0}, {0x3c05, 0x98, 0, 0},
291 {0x3c06, 0x00, 0, 0}, {0x3c07, 0x08, 0, 0}, {0x3c08, 0x00, 0, 0},
292 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
293 {0x3820, 0x41, 0, 0}, {0x3821, 0x07, 0, 0}, {0x3814, 0x31, 0, 0},
294 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
295 {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
296 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
297 {0x3810, 0x00, 0, 0},
298 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
299 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
300 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
301 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
302 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
303 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
304 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x3000, 0x00, 0, 0},
305 {0x3002, 0x1c, 0, 0}, {0x3004, 0xff, 0, 0}, {0x3006, 0xc3, 0, 0},
306 {0x302e, 0x08, 0, 0}, {0x4300, 0x3f, 0, 0},
307 {0x501f, 0x00, 0, 0}, {0x4407, 0x04, 0, 0},
308 {0x440e, 0x00, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
309 {0x4837, 0x0a, 0, 0}, {0x3824, 0x02, 0, 0},
310 {0x5000, 0xa7, 0, 0}, {0x5001, 0xa3, 0, 0}, {0x5180, 0xff, 0, 0},
311 {0x5181, 0xf2, 0, 0}, {0x5182, 0x00, 0, 0}, {0x5183, 0x14, 0, 0},
312 {0x5184, 0x25, 0, 0}, {0x5185, 0x24, 0, 0}, {0x5186, 0x09, 0, 0},
313 {0x5187, 0x09, 0, 0}, {0x5188, 0x09, 0, 0}, {0x5189, 0x88, 0, 0},
314 {0x518a, 0x54, 0, 0}, {0x518b, 0xee, 0, 0}, {0x518c, 0xb2, 0, 0},
315 {0x518d, 0x50, 0, 0}, {0x518e, 0x34, 0, 0}, {0x518f, 0x6b, 0, 0},
316 {0x5190, 0x46, 0, 0}, {0x5191, 0xf8, 0, 0}, {0x5192, 0x04, 0, 0},
317 {0x5193, 0x70, 0, 0}, {0x5194, 0xf0, 0, 0}, {0x5195, 0xf0, 0, 0},
318 {0x5196, 0x03, 0, 0}, {0x5197, 0x01, 0, 0}, {0x5198, 0x04, 0, 0},
319 {0x5199, 0x6c, 0, 0}, {0x519a, 0x04, 0, 0}, {0x519b, 0x00, 0, 0},
320 {0x519c, 0x09, 0, 0}, {0x519d, 0x2b, 0, 0}, {0x519e, 0x38, 0, 0},
321 {0x5381, 0x1e, 0, 0}, {0x5382, 0x5b, 0, 0}, {0x5383, 0x08, 0, 0},
322 {0x5384, 0x0a, 0, 0}, {0x5385, 0x7e, 0, 0}, {0x5386, 0x88, 0, 0},
323 {0x5387, 0x7c, 0, 0}, {0x5388, 0x6c, 0, 0}, {0x5389, 0x10, 0, 0},
324 {0x538a, 0x01, 0, 0}, {0x538b, 0x98, 0, 0}, {0x5300, 0x08, 0, 0},
325 {0x5301, 0x30, 0, 0}, {0x5302, 0x10, 0, 0}, {0x5303, 0x00, 0, 0},
326 {0x5304, 0x08, 0, 0}, {0x5305, 0x30, 0, 0}, {0x5306, 0x08, 0, 0},
327 {0x5307, 0x16, 0, 0}, {0x5309, 0x08, 0, 0}, {0x530a, 0x30, 0, 0},
328 {0x530b, 0x04, 0, 0}, {0x530c, 0x06, 0, 0}, {0x5480, 0x01, 0, 0},
329 {0x5481, 0x08, 0, 0}, {0x5482, 0x14, 0, 0}, {0x5483, 0x28, 0, 0},
330 {0x5484, 0x51, 0, 0}, {0x5485, 0x65, 0, 0}, {0x5486, 0x71, 0, 0},
331 {0x5487, 0x7d, 0, 0}, {0x5488, 0x87, 0, 0}, {0x5489, 0x91, 0, 0},
332 {0x548a, 0x9a, 0, 0}, {0x548b, 0xaa, 0, 0}, {0x548c, 0xb8, 0, 0},
333 {0x548d, 0xcd, 0, 0}, {0x548e, 0xdd, 0, 0}, {0x548f, 0xea, 0, 0},
334 {0x5490, 0x1d, 0, 0}, {0x5580, 0x02, 0, 0}, {0x5583, 0x40, 0, 0},
335 {0x5584, 0x10, 0, 0}, {0x5589, 0x10, 0, 0}, {0x558a, 0x00, 0, 0},
336 {0x558b, 0xf8, 0, 0}, {0x5800, 0x23, 0, 0}, {0x5801, 0x14, 0, 0},
337 {0x5802, 0x0f, 0, 0}, {0x5803, 0x0f, 0, 0}, {0x5804, 0x12, 0, 0},
338 {0x5805, 0x26, 0, 0}, {0x5806, 0x0c, 0, 0}, {0x5807, 0x08, 0, 0},
339 {0x5808, 0x05, 0, 0}, {0x5809, 0x05, 0, 0}, {0x580a, 0x08, 0, 0},
340 {0x580b, 0x0d, 0, 0}, {0x580c, 0x08, 0, 0}, {0x580d, 0x03, 0, 0},
341 {0x580e, 0x00, 0, 0}, {0x580f, 0x00, 0, 0}, {0x5810, 0x03, 0, 0},
342 {0x5811, 0x09, 0, 0}, {0x5812, 0x07, 0, 0}, {0x5813, 0x03, 0, 0},
343 {0x5814, 0x00, 0, 0}, {0x5815, 0x01, 0, 0}, {0x5816, 0x03, 0, 0},
344 {0x5817, 0x08, 0, 0}, {0x5818, 0x0d, 0, 0}, {0x5819, 0x08, 0, 0},
345 {0x581a, 0x05, 0, 0}, {0x581b, 0x06, 0, 0}, {0x581c, 0x08, 0, 0},
346 {0x581d, 0x0e, 0, 0}, {0x581e, 0x29, 0, 0}, {0x581f, 0x17, 0, 0},
347 {0x5820, 0x11, 0, 0}, {0x5821, 0x11, 0, 0}, {0x5822, 0x15, 0, 0},
348 {0x5823, 0x28, 0, 0}, {0x5824, 0x46, 0, 0}, {0x5825, 0x26, 0, 0},
349 {0x5826, 0x08, 0, 0}, {0x5827, 0x26, 0, 0}, {0x5828, 0x64, 0, 0},
350 {0x5829, 0x26, 0, 0}, {0x582a, 0x24, 0, 0}, {0x582b, 0x22, 0, 0},
351 {0x582c, 0x24, 0, 0}, {0x582d, 0x24, 0, 0}, {0x582e, 0x06, 0, 0},
352 {0x582f, 0x22, 0, 0}, {0x5830, 0x40, 0, 0}, {0x5831, 0x42, 0, 0},
353 {0x5832, 0x24, 0, 0}, {0x5833, 0x26, 0, 0}, {0x5834, 0x24, 0, 0},
354 {0x5835, 0x22, 0, 0}, {0x5836, 0x22, 0, 0}, {0x5837, 0x26, 0, 0},
355 {0x5838, 0x44, 0, 0}, {0x5839, 0x24, 0, 0}, {0x583a, 0x26, 0, 0},
356 {0x583b, 0x28, 0, 0}, {0x583c, 0x42, 0, 0}, {0x583d, 0xce, 0, 0},
357 {0x5025, 0x00, 0, 0}, {0x3a0f, 0x30, 0, 0}, {0x3a10, 0x28, 0, 0},
358 {0x3a1b, 0x30, 0, 0}, {0x3a1e, 0x26, 0, 0}, {0x3a11, 0x60, 0, 0},
359 {0x3a1f, 0x14, 0, 0}, {0x3008, 0x02, 0, 0}, {0x3c00, 0x04, 0, 300},
360 };
361
362 static const struct reg_value ov5640_setting_VGA_640_480[] = {
363 {0x3c07, 0x08, 0, 0},
364 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
365 {0x3814, 0x31, 0, 0},
366 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
367 {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
368 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
369 {0x3810, 0x00, 0, 0},
370 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
371 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
372 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
373 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
374 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
375 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
376 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
377 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
378 {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
379 };
380
381 static const struct reg_value ov5640_setting_XGA_1024_768[] = {
382 {0x3c07, 0x08, 0, 0},
383 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
384 {0x3814, 0x31, 0, 0},
385 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
386 {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
387 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
388 {0x3810, 0x00, 0, 0},
389 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
390 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
391 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
392 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
393 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
394 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
395 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
396 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
397 {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
398 };
399
400 static const struct reg_value ov5640_setting_QVGA_320_240[] = {
401 {0x3c07, 0x08, 0, 0},
402 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
403 {0x3814, 0x31, 0, 0},
404 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
405 {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
406 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
407 {0x3810, 0x00, 0, 0},
408 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
409 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
410 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
411 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
412 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
413 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
414 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
415 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
416 {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
417 };
418
419 static const struct reg_value ov5640_setting_QCIF_176_144[] = {
420 {0x3c07, 0x08, 0, 0},
421 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
422 {0x3814, 0x31, 0, 0},
423 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
424 {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
425 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
426 {0x3810, 0x00, 0, 0},
427 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
428 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
429 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
430 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
431 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
432 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
433 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
434 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
435 {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
436 };
437
438 static const struct reg_value ov5640_setting_NTSC_720_480[] = {
439 {0x3c07, 0x08, 0, 0},
440 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
441 {0x3814, 0x31, 0, 0},
442 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
443 {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
444 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
445 {0x3810, 0x00, 0, 0},
446 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x3c, 0, 0},
447 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
448 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
449 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
450 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
451 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
452 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
453 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
454 {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
455 };
456
457 static const struct reg_value ov5640_setting_PAL_720_576[] = {
458 {0x3c07, 0x08, 0, 0},
459 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
460 {0x3814, 0x31, 0, 0},
461 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
462 {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
463 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
464 {0x3810, 0x00, 0, 0},
465 {0x3811, 0x38, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
466 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
467 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
468 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
469 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
470 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
471 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
472 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
473 {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
474 };
475
476 static const struct reg_value ov5640_setting_720P_1280_720[] = {
477 {0x3c07, 0x07, 0, 0},
478 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
479 {0x3814, 0x31, 0, 0},
480 {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
481 {0x3802, 0x00, 0, 0}, {0x3803, 0xfa, 0, 0}, {0x3804, 0x0a, 0, 0},
482 {0x3805, 0x3f, 0, 0}, {0x3806, 0x06, 0, 0}, {0x3807, 0xa9, 0, 0},
483 {0x3810, 0x00, 0, 0},
484 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
485 {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
486 {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x02, 0, 0},
487 {0x3a03, 0xe4, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0xbc, 0, 0},
488 {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x72, 0, 0}, {0x3a0e, 0x01, 0, 0},
489 {0x3a0d, 0x02, 0, 0}, {0x3a14, 0x02, 0, 0}, {0x3a15, 0xe4, 0, 0},
490 {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
491 {0x4407, 0x04, 0, 0}, {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0},
492 {0x3824, 0x04, 0, 0}, {0x5001, 0x83, 0, 0},
493 };
494
495 static const struct reg_value ov5640_setting_1080P_1920_1080[] = {
496 {0x3c07, 0x08, 0, 0},
497 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
498 {0x3814, 0x11, 0, 0},
499 {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
500 {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
501 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
502 {0x3810, 0x00, 0, 0},
503 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
504 {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
505 {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
506 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
507 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
508 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
509 {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
510 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
511 {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 0},
512 {0x3c07, 0x07, 0, 0}, {0x3c08, 0x00, 0, 0},
513 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
514 {0x3800, 0x01, 0, 0}, {0x3801, 0x50, 0, 0}, {0x3802, 0x01, 0, 0},
515 {0x3803, 0xb2, 0, 0}, {0x3804, 0x08, 0, 0}, {0x3805, 0xef, 0, 0},
516 {0x3806, 0x05, 0, 0}, {0x3807, 0xf1, 0, 0},
517 {0x3612, 0x2b, 0, 0}, {0x3708, 0x64, 0, 0},
518 {0x3a02, 0x04, 0, 0}, {0x3a03, 0x60, 0, 0}, {0x3a08, 0x01, 0, 0},
519 {0x3a09, 0x50, 0, 0}, {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x18, 0, 0},
520 {0x3a0e, 0x03, 0, 0}, {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x04, 0, 0},
521 {0x3a15, 0x60, 0, 0}, {0x4407, 0x04, 0, 0},
522 {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0}, {0x3824, 0x04, 0, 0},
523 {0x4005, 0x1a, 0, 0},
524 };
525
526 static const struct reg_value ov5640_setting_QSXGA_2592_1944[] = {
527 {0x3c07, 0x08, 0, 0},
528 {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
529 {0x3814, 0x11, 0, 0},
530 {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
531 {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
532 {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
533 {0x3810, 0x00, 0, 0},
534 {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
535 {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
536 {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
537 {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
538 {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
539 {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
540 {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
541 {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
542 {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 70},
543 };
544
545 /* power-on sensor init reg table */
546 static const struct ov5640_mode_info ov5640_mode_init_data = {
547 0, SUBSAMPLING, 640, 1896, 480, 984,
548 ov5640_init_setting_30fps_VGA,
549 ARRAY_SIZE(ov5640_init_setting_30fps_VGA),
550 OV5640_30_FPS,
551 };
552
553 static const struct ov5640_mode_info
554 ov5640_mode_data[OV5640_NUM_MODES] = {
555 {OV5640_MODE_QCIF_176_144, SUBSAMPLING,
556 176, 1896, 144, 984,
557 ov5640_setting_QCIF_176_144,
558 ARRAY_SIZE(ov5640_setting_QCIF_176_144),
559 OV5640_30_FPS},
560 {OV5640_MODE_QVGA_320_240, SUBSAMPLING,
561 320, 1896, 240, 984,
562 ov5640_setting_QVGA_320_240,
563 ARRAY_SIZE(ov5640_setting_QVGA_320_240),
564 OV5640_30_FPS},
565 {OV5640_MODE_VGA_640_480, SUBSAMPLING,
566 640, 1896, 480, 1080,
567 ov5640_setting_VGA_640_480,
568 ARRAY_SIZE(ov5640_setting_VGA_640_480),
569 OV5640_60_FPS},
570 {OV5640_MODE_NTSC_720_480, SUBSAMPLING,
571 720, 1896, 480, 984,
572 ov5640_setting_NTSC_720_480,
573 ARRAY_SIZE(ov5640_setting_NTSC_720_480),
574 OV5640_30_FPS},
575 {OV5640_MODE_PAL_720_576, SUBSAMPLING,
576 720, 1896, 576, 984,
577 ov5640_setting_PAL_720_576,
578 ARRAY_SIZE(ov5640_setting_PAL_720_576),
579 OV5640_30_FPS},
580 {OV5640_MODE_XGA_1024_768, SUBSAMPLING,
581 1024, 1896, 768, 1080,
582 ov5640_setting_XGA_1024_768,
583 ARRAY_SIZE(ov5640_setting_XGA_1024_768),
584 OV5640_30_FPS},
585 {OV5640_MODE_720P_1280_720, SUBSAMPLING,
586 1280, 1892, 720, 740,
587 ov5640_setting_720P_1280_720,
588 ARRAY_SIZE(ov5640_setting_720P_1280_720),
589 OV5640_30_FPS},
590 {OV5640_MODE_1080P_1920_1080, SCALING,
591 1920, 2500, 1080, 1120,
592 ov5640_setting_1080P_1920_1080,
593 ARRAY_SIZE(ov5640_setting_1080P_1920_1080),
594 OV5640_30_FPS},
595 {OV5640_MODE_QSXGA_2592_1944, SCALING,
596 2592, 2844, 1944, 1968,
597 ov5640_setting_QSXGA_2592_1944,
598 ARRAY_SIZE(ov5640_setting_QSXGA_2592_1944),
599 OV5640_15_FPS},
600 };
601
ov5640_init_slave_id(struct ov5640_dev * sensor)602 static int ov5640_init_slave_id(struct ov5640_dev *sensor)
603 {
604 struct i2c_client *client = sensor->i2c_client;
605 struct i2c_msg msg;
606 u8 buf[3];
607 int ret;
608
609 if (client->addr == OV5640_DEFAULT_SLAVE_ID)
610 return 0;
611
612 buf[0] = OV5640_REG_SLAVE_ID >> 8;
613 buf[1] = OV5640_REG_SLAVE_ID & 0xff;
614 buf[2] = client->addr << 1;
615
616 msg.addr = OV5640_DEFAULT_SLAVE_ID;
617 msg.flags = 0;
618 msg.buf = buf;
619 msg.len = sizeof(buf);
620
621 ret = i2c_transfer(client->adapter, &msg, 1);
622 if (ret < 0) {
623 dev_err(&client->dev, "%s: failed with %d\n", __func__, ret);
624 return ret;
625 }
626
627 return 0;
628 }
629
ov5640_write_reg(struct ov5640_dev * sensor,u16 reg,u8 val)630 static int ov5640_write_reg(struct ov5640_dev *sensor, u16 reg, u8 val)
631 {
632 struct i2c_client *client = sensor->i2c_client;
633 struct i2c_msg msg;
634 u8 buf[3];
635 int ret;
636
637 buf[0] = reg >> 8;
638 buf[1] = reg & 0xff;
639 buf[2] = val;
640
641 msg.addr = client->addr;
642 msg.flags = client->flags;
643 msg.buf = buf;
644 msg.len = sizeof(buf);
645
646 ret = i2c_transfer(client->adapter, &msg, 1);
647 if (ret < 0) {
648 dev_err(&client->dev, "%s: error: reg=%x, val=%x\n",
649 __func__, reg, val);
650 return ret;
651 }
652
653 return 0;
654 }
655
ov5640_read_reg(struct ov5640_dev * sensor,u16 reg,u8 * val)656 static int ov5640_read_reg(struct ov5640_dev *sensor, u16 reg, u8 *val)
657 {
658 struct i2c_client *client = sensor->i2c_client;
659 struct i2c_msg msg[2];
660 u8 buf[2];
661 int ret;
662
663 buf[0] = reg >> 8;
664 buf[1] = reg & 0xff;
665
666 msg[0].addr = client->addr;
667 msg[0].flags = client->flags;
668 msg[0].buf = buf;
669 msg[0].len = sizeof(buf);
670
671 msg[1].addr = client->addr;
672 msg[1].flags = client->flags | I2C_M_RD;
673 msg[1].buf = buf;
674 msg[1].len = 1;
675
676 ret = i2c_transfer(client->adapter, msg, 2);
677 if (ret < 0) {
678 dev_err(&client->dev, "%s: error: reg=%x\n",
679 __func__, reg);
680 return ret;
681 }
682
683 *val = buf[0];
684 return 0;
685 }
686
ov5640_read_reg16(struct ov5640_dev * sensor,u16 reg,u16 * val)687 static int ov5640_read_reg16(struct ov5640_dev *sensor, u16 reg, u16 *val)
688 {
689 u8 hi, lo;
690 int ret;
691
692 ret = ov5640_read_reg(sensor, reg, &hi);
693 if (ret)
694 return ret;
695 ret = ov5640_read_reg(sensor, reg + 1, &lo);
696 if (ret)
697 return ret;
698
699 *val = ((u16)hi << 8) | (u16)lo;
700 return 0;
701 }
702
ov5640_write_reg16(struct ov5640_dev * sensor,u16 reg,u16 val)703 static int ov5640_write_reg16(struct ov5640_dev *sensor, u16 reg, u16 val)
704 {
705 int ret;
706
707 ret = ov5640_write_reg(sensor, reg, val >> 8);
708 if (ret)
709 return ret;
710
711 return ov5640_write_reg(sensor, reg + 1, val & 0xff);
712 }
713
ov5640_mod_reg(struct ov5640_dev * sensor,u16 reg,u8 mask,u8 val)714 static int ov5640_mod_reg(struct ov5640_dev *sensor, u16 reg,
715 u8 mask, u8 val)
716 {
717 u8 readval;
718 int ret;
719
720 ret = ov5640_read_reg(sensor, reg, &readval);
721 if (ret)
722 return ret;
723
724 readval &= ~mask;
725 val &= mask;
726 val |= readval;
727
728 return ov5640_write_reg(sensor, reg, val);
729 }
730
731 /*
732 * After trying the various combinations, reading various
733 * documentations spread around the net, and from the various
734 * feedback, the clock tree is probably as follows:
735 *
736 * +--------------+
737 * | Ext. Clock |
738 * +-+------------+
739 * | +----------+
740 * +->| PLL1 | - reg 0x3036, for the multiplier
741 * +-+--------+ - reg 0x3037, bits 0-3 for the pre-divider
742 * | +--------------+
743 * +->| System Clock | - reg 0x3035, bits 4-7
744 * +-+------------+
745 * | +--------------+
746 * +->| MIPI Divider | - reg 0x3035, bits 0-3
747 * | +-+------------+
748 * | +----------------> MIPI SCLK
749 * | + +-----+
750 * | +->| / 2 |-------> MIPI BIT CLK
751 * | +-----+
752 * | +--------------+
753 * +->| PLL Root Div | - reg 0x3037, bit 4
754 * +-+------------+
755 * | +---------+
756 * +->| Bit Div | - reg 0x3034, bits 0-3
757 * +-+-------+
758 * | +-------------+
759 * +->| SCLK Div | - reg 0x3108, bits 0-1
760 * | +-+-----------+
761 * | +---------------> SCLK
762 * | +-------------+
763 * +->| SCLK 2X Div | - reg 0x3108, bits 2-3
764 * | +-+-----------+
765 * | +---------------> SCLK 2X
766 * | +-------------+
767 * +->| PCLK Div | - reg 0x3108, bits 4-5
768 * ++------------+
769 * + +-----------+
770 * +->| P_DIV | - reg 0x3035, bits 0-3
771 * +-----+-----+
772 * +------------> PCLK
773 *
774 * This is deviating from the datasheet at least for the register
775 * 0x3108, since it's said here that the PCLK would be clocked from
776 * the PLL.
777 *
778 * There seems to be also (unverified) constraints:
779 * - the PLL pre-divider output rate should be in the 4-27MHz range
780 * - the PLL multiplier output rate should be in the 500-1000MHz range
781 * - PCLK >= SCLK * 2 in YUV, >= SCLK in Raw or JPEG
782 *
783 * In the two latter cases, these constraints are met since our
784 * factors are hardcoded. If we were to change that, we would need to
785 * take this into account. The only varying parts are the PLL
786 * multiplier and the system clock divider, which are shared between
787 * all these clocks so won't cause any issue.
788 */
789
790 /*
791 * This is supposed to be ranging from 1 to 8, but the value is always
792 * set to 3 in the vendor kernels.
793 */
794 #define OV5640_PLL_PREDIV 3
795
796 #define OV5640_PLL_MULT_MIN 4
797 #define OV5640_PLL_MULT_MAX 252
798
799 /*
800 * This is supposed to be ranging from 1 to 16, but the value is
801 * always set to either 1 or 2 in the vendor kernels.
802 */
803 #define OV5640_SYSDIV_MIN 1
804 #define OV5640_SYSDIV_MAX 16
805
806 /*
807 * Hardcode these values for scaler and non-scaler modes.
808 * FIXME: to be re-calcualted for 1 data lanes setups
809 */
810 #define OV5640_MIPI_DIV_PCLK 2
811 #define OV5640_MIPI_DIV_SCLK 1
812
813 /*
814 * This is supposed to be ranging from 1 to 2, but the value is always
815 * set to 2 in the vendor kernels.
816 */
817 #define OV5640_PLL_ROOT_DIV 2
818 #define OV5640_PLL_CTRL3_PLL_ROOT_DIV_2 BIT(4)
819
820 /*
821 * We only supports 8-bit formats at the moment
822 */
823 #define OV5640_BIT_DIV 2
824 #define OV5640_PLL_CTRL0_MIPI_MODE_8BIT 0x08
825
826 /*
827 * This is supposed to be ranging from 1 to 8, but the value is always
828 * set to 2 in the vendor kernels.
829 */
830 #define OV5640_SCLK_ROOT_DIV 2
831
832 /*
833 * This is hardcoded so that the consistency is maintained between SCLK and
834 * SCLK 2x.
835 */
836 #define OV5640_SCLK2X_ROOT_DIV (OV5640_SCLK_ROOT_DIV / 2)
837
838 /*
839 * This is supposed to be ranging from 1 to 8, but the value is always
840 * set to 1 in the vendor kernels.
841 */
842 #define OV5640_PCLK_ROOT_DIV 1
843 #define OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS 0x00
844
ov5640_compute_sys_clk(struct ov5640_dev * sensor,u8 pll_prediv,u8 pll_mult,u8 sysdiv)845 static unsigned long ov5640_compute_sys_clk(struct ov5640_dev *sensor,
846 u8 pll_prediv, u8 pll_mult,
847 u8 sysdiv)
848 {
849 unsigned long sysclk = sensor->xclk_freq / pll_prediv * pll_mult;
850
851 /* PLL1 output cannot exceed 1GHz. */
852 if (sysclk / 1000000 > 1000)
853 return 0;
854
855 return sysclk / sysdiv;
856 }
857
ov5640_calc_sys_clk(struct ov5640_dev * sensor,unsigned long rate,u8 * pll_prediv,u8 * pll_mult,u8 * sysdiv)858 static unsigned long ov5640_calc_sys_clk(struct ov5640_dev *sensor,
859 unsigned long rate,
860 u8 *pll_prediv, u8 *pll_mult,
861 u8 *sysdiv)
862 {
863 unsigned long best = ~0;
864 u8 best_sysdiv = 1, best_mult = 1;
865 u8 _sysdiv, _pll_mult;
866
867 for (_sysdiv = OV5640_SYSDIV_MIN;
868 _sysdiv <= OV5640_SYSDIV_MAX;
869 _sysdiv++) {
870 for (_pll_mult = OV5640_PLL_MULT_MIN;
871 _pll_mult <= OV5640_PLL_MULT_MAX;
872 _pll_mult++) {
873 unsigned long _rate;
874
875 /*
876 * The PLL multiplier cannot be odd if above
877 * 127.
878 */
879 if (_pll_mult > 127 && (_pll_mult % 2))
880 continue;
881
882 _rate = ov5640_compute_sys_clk(sensor,
883 OV5640_PLL_PREDIV,
884 _pll_mult, _sysdiv);
885
886 /*
887 * We have reached the maximum allowed PLL1 output,
888 * increase sysdiv.
889 */
890 if (!_rate)
891 break;
892
893 /*
894 * Prefer rates above the expected clock rate than
895 * below, even if that means being less precise.
896 */
897 if (_rate < rate)
898 continue;
899
900 if (abs(rate - _rate) < abs(rate - best)) {
901 best = _rate;
902 best_sysdiv = _sysdiv;
903 best_mult = _pll_mult;
904 }
905
906 if (_rate == rate)
907 goto out;
908 }
909 }
910
911 out:
912 *sysdiv = best_sysdiv;
913 *pll_prediv = OV5640_PLL_PREDIV;
914 *pll_mult = best_mult;
915
916 return best;
917 }
918
919 /*
920 * ov5640_set_mipi_pclk() - Calculate the clock tree configuration values
921 * for the MIPI CSI-2 output.
922 *
923 * @rate: The requested bandwidth per lane in bytes per second.
924 * 'Bandwidth Per Lane' is calculated as:
925 * bpl = HTOT * VTOT * FPS * bpp / num_lanes;
926 *
927 * This function use the requested bandwidth to calculate:
928 * - sample_rate = bpl / (bpp / num_lanes);
929 * = bpl / (PLL_RDIV * BIT_DIV * PCLK_DIV * MIPI_DIV / num_lanes);
930 *
931 * - mipi_sclk = bpl / MIPI_DIV / 2; ( / 2 is for CSI-2 DDR)
932 *
933 * with these fixed parameters:
934 * PLL_RDIV = 2;
935 * BIT_DIVIDER = 2; (MIPI_BIT_MODE == 8 ? 2 : 2,5);
936 * PCLK_DIV = 1;
937 *
938 * The MIPI clock generation differs for modes that use the scaler and modes
939 * that do not. In case the scaler is in use, the MIPI_SCLK generates the MIPI
940 * BIT CLk, and thus:
941 *
942 * - mipi_sclk = bpl / MIPI_DIV / 2;
943 * MIPI_DIV = 1;
944 *
945 * For modes that do not go through the scaler, the MIPI BIT CLOCK is generated
946 * from the pixel clock, and thus:
947 *
948 * - sample_rate = bpl / (bpp / num_lanes);
949 * = bpl / (2 * 2 * 1 * MIPI_DIV / num_lanes);
950 * = bpl / (4 * MIPI_DIV / num_lanes);
951 * - MIPI_DIV = bpp / (4 * num_lanes);
952 *
953 * FIXME: this have been tested with 16bpp and 2 lanes setup only.
954 * MIPI_DIV is fixed to value 2, but it -might- be changed according to the
955 * above formula for setups with 1 lane or image formats with different bpp.
956 *
957 * FIXME: this deviates from the sensor manual documentation which is quite
958 * thin on the MIPI clock tree generation part.
959 */
ov5640_set_mipi_pclk(struct ov5640_dev * sensor,unsigned long rate)960 static int ov5640_set_mipi_pclk(struct ov5640_dev *sensor,
961 unsigned long rate)
962 {
963 const struct ov5640_mode_info *mode = sensor->current_mode;
964 u8 prediv, mult, sysdiv;
965 u8 mipi_div;
966 int ret;
967
968 /*
969 * 1280x720 is reported to use 'SUBSAMPLING' only,
970 * but according to the sensor manual it goes through the
971 * scaler before subsampling.
972 */
973 if (mode->dn_mode == SCALING ||
974 (mode->id == OV5640_MODE_720P_1280_720))
975 mipi_div = OV5640_MIPI_DIV_SCLK;
976 else
977 mipi_div = OV5640_MIPI_DIV_PCLK;
978
979 ov5640_calc_sys_clk(sensor, rate, &prediv, &mult, &sysdiv);
980
981 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
982 0x0f, OV5640_PLL_CTRL0_MIPI_MODE_8BIT);
983
984 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
985 0xff, sysdiv << 4 | mipi_div);
986 if (ret)
987 return ret;
988
989 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2, 0xff, mult);
990 if (ret)
991 return ret;
992
993 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
994 0x1f, OV5640_PLL_CTRL3_PLL_ROOT_DIV_2 | prediv);
995 if (ret)
996 return ret;
997
998 return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER,
999 0x30, OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS);
1000 }
1001
ov5640_calc_pclk(struct ov5640_dev * sensor,unsigned long rate,u8 * pll_prediv,u8 * pll_mult,u8 * sysdiv,u8 * pll_rdiv,u8 * bit_div,u8 * pclk_div)1002 static unsigned long ov5640_calc_pclk(struct ov5640_dev *sensor,
1003 unsigned long rate,
1004 u8 *pll_prediv, u8 *pll_mult, u8 *sysdiv,
1005 u8 *pll_rdiv, u8 *bit_div, u8 *pclk_div)
1006 {
1007 unsigned long _rate = rate * OV5640_PLL_ROOT_DIV * OV5640_BIT_DIV *
1008 OV5640_PCLK_ROOT_DIV;
1009
1010 _rate = ov5640_calc_sys_clk(sensor, _rate, pll_prediv, pll_mult,
1011 sysdiv);
1012 *pll_rdiv = OV5640_PLL_ROOT_DIV;
1013 *bit_div = OV5640_BIT_DIV;
1014 *pclk_div = OV5640_PCLK_ROOT_DIV;
1015
1016 return _rate / *pll_rdiv / *bit_div / *pclk_div;
1017 }
1018
ov5640_set_dvp_pclk(struct ov5640_dev * sensor,unsigned long rate)1019 static int ov5640_set_dvp_pclk(struct ov5640_dev *sensor, unsigned long rate)
1020 {
1021 u8 prediv, mult, sysdiv, pll_rdiv, bit_div, pclk_div;
1022 int ret;
1023
1024 ov5640_calc_pclk(sensor, rate, &prediv, &mult, &sysdiv, &pll_rdiv,
1025 &bit_div, &pclk_div);
1026
1027 if (bit_div == 2)
1028 bit_div = 8;
1029
1030 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
1031 0x0f, bit_div);
1032 if (ret)
1033 return ret;
1034
1035 /*
1036 * We need to set sysdiv according to the clock, and to clear
1037 * the MIPI divider.
1038 */
1039 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
1040 0xff, sysdiv << 4);
1041 if (ret)
1042 return ret;
1043
1044 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2,
1045 0xff, mult);
1046 if (ret)
1047 return ret;
1048
1049 ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
1050 0x1f, prediv | ((pll_rdiv - 1) << 4));
1051 if (ret)
1052 return ret;
1053
1054 return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x30,
1055 (ilog2(pclk_div) << 4));
1056 }
1057
1058 /* set JPEG framing sizes */
ov5640_set_jpeg_timings(struct ov5640_dev * sensor,const struct ov5640_mode_info * mode)1059 static int ov5640_set_jpeg_timings(struct ov5640_dev *sensor,
1060 const struct ov5640_mode_info *mode)
1061 {
1062 int ret;
1063
1064 /*
1065 * compression mode 3 timing
1066 *
1067 * Data is transmitted with programmable width (VFIFO_HSIZE).
1068 * No padding done. Last line may have less data. Varying
1069 * number of lines per frame, depending on amount of data.
1070 */
1071 ret = ov5640_mod_reg(sensor, OV5640_REG_JPG_MODE_SELECT, 0x7, 0x3);
1072 if (ret < 0)
1073 return ret;
1074
1075 ret = ov5640_write_reg16(sensor, OV5640_REG_VFIFO_HSIZE, mode->hact);
1076 if (ret < 0)
1077 return ret;
1078
1079 return ov5640_write_reg16(sensor, OV5640_REG_VFIFO_VSIZE, mode->vact);
1080 }
1081
1082 /* download ov5640 settings to sensor through i2c */
ov5640_set_timings(struct ov5640_dev * sensor,const struct ov5640_mode_info * mode)1083 static int ov5640_set_timings(struct ov5640_dev *sensor,
1084 const struct ov5640_mode_info *mode)
1085 {
1086 int ret;
1087
1088 if (sensor->fmt.code == MEDIA_BUS_FMT_JPEG_1X8) {
1089 ret = ov5640_set_jpeg_timings(sensor, mode);
1090 if (ret < 0)
1091 return ret;
1092 }
1093
1094 ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPHO, mode->hact);
1095 if (ret < 0)
1096 return ret;
1097
1098 ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPVO, mode->vact);
1099 if (ret < 0)
1100 return ret;
1101
1102 ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HTS, mode->htot);
1103 if (ret < 0)
1104 return ret;
1105
1106 return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, mode->vtot);
1107 }
1108
ov5640_load_regs(struct ov5640_dev * sensor,const struct ov5640_mode_info * mode)1109 static int ov5640_load_regs(struct ov5640_dev *sensor,
1110 const struct ov5640_mode_info *mode)
1111 {
1112 const struct reg_value *regs = mode->reg_data;
1113 unsigned int i;
1114 u32 delay_ms;
1115 u16 reg_addr;
1116 u8 mask, val;
1117 int ret = 0;
1118
1119 for (i = 0; i < mode->reg_data_size; ++i, ++regs) {
1120 delay_ms = regs->delay_ms;
1121 reg_addr = regs->reg_addr;
1122 val = regs->val;
1123 mask = regs->mask;
1124
1125 /* remain in power down mode for DVP */
1126 if (regs->reg_addr == OV5640_REG_SYS_CTRL0 &&
1127 val == OV5640_REG_SYS_CTRL0_SW_PWUP &&
1128 sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY)
1129 continue;
1130
1131 if (mask)
1132 ret = ov5640_mod_reg(sensor, reg_addr, mask, val);
1133 else
1134 ret = ov5640_write_reg(sensor, reg_addr, val);
1135 if (ret)
1136 break;
1137
1138 if (delay_ms)
1139 usleep_range(1000 * delay_ms, 1000 * delay_ms + 100);
1140 }
1141
1142 return ov5640_set_timings(sensor, mode);
1143 }
1144
ov5640_set_autoexposure(struct ov5640_dev * sensor,bool on)1145 static int ov5640_set_autoexposure(struct ov5640_dev *sensor, bool on)
1146 {
1147 return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1148 BIT(0), on ? 0 : BIT(0));
1149 }
1150
1151 /* read exposure, in number of line periods */
ov5640_get_exposure(struct ov5640_dev * sensor)1152 static int ov5640_get_exposure(struct ov5640_dev *sensor)
1153 {
1154 int exp, ret;
1155 u8 temp;
1156
1157 ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_HI, &temp);
1158 if (ret)
1159 return ret;
1160 exp = ((int)temp & 0x0f) << 16;
1161 ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_MED, &temp);
1162 if (ret)
1163 return ret;
1164 exp |= ((int)temp << 8);
1165 ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_LO, &temp);
1166 if (ret)
1167 return ret;
1168 exp |= (int)temp;
1169
1170 return exp >> 4;
1171 }
1172
1173 /* write exposure, given number of line periods */
ov5640_set_exposure(struct ov5640_dev * sensor,u32 exposure)1174 static int ov5640_set_exposure(struct ov5640_dev *sensor, u32 exposure)
1175 {
1176 int ret;
1177
1178 exposure <<= 4;
1179
1180 ret = ov5640_write_reg(sensor,
1181 OV5640_REG_AEC_PK_EXPOSURE_LO,
1182 exposure & 0xff);
1183 if (ret)
1184 return ret;
1185 ret = ov5640_write_reg(sensor,
1186 OV5640_REG_AEC_PK_EXPOSURE_MED,
1187 (exposure >> 8) & 0xff);
1188 if (ret)
1189 return ret;
1190 return ov5640_write_reg(sensor,
1191 OV5640_REG_AEC_PK_EXPOSURE_HI,
1192 (exposure >> 16) & 0x0f);
1193 }
1194
ov5640_get_gain(struct ov5640_dev * sensor)1195 static int ov5640_get_gain(struct ov5640_dev *sensor)
1196 {
1197 u16 gain;
1198 int ret;
1199
1200 ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN, &gain);
1201 if (ret)
1202 return ret;
1203
1204 return gain & 0x3ff;
1205 }
1206
ov5640_set_gain(struct ov5640_dev * sensor,int gain)1207 static int ov5640_set_gain(struct ov5640_dev *sensor, int gain)
1208 {
1209 return ov5640_write_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN,
1210 (u16)gain & 0x3ff);
1211 }
1212
ov5640_set_autogain(struct ov5640_dev * sensor,bool on)1213 static int ov5640_set_autogain(struct ov5640_dev *sensor, bool on)
1214 {
1215 return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1216 BIT(1), on ? 0 : BIT(1));
1217 }
1218
ov5640_set_stream_bt656(struct ov5640_dev * sensor,bool on)1219 static int ov5640_set_stream_bt656(struct ov5640_dev *sensor, bool on)
1220 {
1221 int ret;
1222
1223 ret = ov5640_write_reg(sensor, OV5640_REG_CCIR656_CTRL00,
1224 on ? 0x1 : 0x00);
1225 if (ret)
1226 return ret;
1227
1228 return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ?
1229 OV5640_REG_SYS_CTRL0_SW_PWUP :
1230 OV5640_REG_SYS_CTRL0_SW_PWDN);
1231 }
1232
ov5640_set_stream_dvp(struct ov5640_dev * sensor,bool on)1233 static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on)
1234 {
1235 return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ?
1236 OV5640_REG_SYS_CTRL0_SW_PWUP :
1237 OV5640_REG_SYS_CTRL0_SW_PWDN);
1238 }
1239
ov5640_set_stream_mipi(struct ov5640_dev * sensor,bool on)1240 static int ov5640_set_stream_mipi(struct ov5640_dev *sensor, bool on)
1241 {
1242 int ret;
1243
1244 /*
1245 * Enable/disable the MIPI interface
1246 *
1247 * 0x300e = on ? 0x45 : 0x40
1248 *
1249 * FIXME: the sensor manual (version 2.03) reports
1250 * [7:5] = 000 : 1 data lane mode
1251 * [7:5] = 001 : 2 data lanes mode
1252 * But this settings do not work, while the following ones
1253 * have been validated for 2 data lanes mode.
1254 *
1255 * [7:5] = 010 : 2 data lanes mode
1256 * [4] = 0 : Power up MIPI HS Tx
1257 * [3] = 0 : Power up MIPI LS Rx
1258 * [2] = 1/0 : MIPI interface enable/disable
1259 * [1:0] = 01/00: FIXME: 'debug'
1260 */
1261 ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00,
1262 on ? 0x45 : 0x40);
1263 if (ret)
1264 return ret;
1265
1266 return ov5640_write_reg(sensor, OV5640_REG_FRAME_CTRL01,
1267 on ? 0x00 : 0x0f);
1268 }
1269
ov5640_get_sysclk(struct ov5640_dev * sensor)1270 static int ov5640_get_sysclk(struct ov5640_dev *sensor)
1271 {
1272 /* calculate sysclk */
1273 u32 xvclk = sensor->xclk_freq / 10000;
1274 u32 multiplier, prediv, VCO, sysdiv, pll_rdiv;
1275 u32 sclk_rdiv_map[] = {1, 2, 4, 8};
1276 u32 bit_div2x = 1, sclk_rdiv, sysclk;
1277 u8 temp1, temp2;
1278 int ret;
1279
1280 ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL0, &temp1);
1281 if (ret)
1282 return ret;
1283 temp2 = temp1 & 0x0f;
1284 if (temp2 == 8 || temp2 == 10)
1285 bit_div2x = temp2 / 2;
1286
1287 ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL1, &temp1);
1288 if (ret)
1289 return ret;
1290 sysdiv = temp1 >> 4;
1291 if (sysdiv == 0)
1292 sysdiv = 16;
1293
1294 ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL2, &temp1);
1295 if (ret)
1296 return ret;
1297 multiplier = temp1;
1298
1299 ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL3, &temp1);
1300 if (ret)
1301 return ret;
1302 prediv = temp1 & 0x0f;
1303 pll_rdiv = ((temp1 >> 4) & 0x01) + 1;
1304
1305 ret = ov5640_read_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, &temp1);
1306 if (ret)
1307 return ret;
1308 temp2 = temp1 & 0x03;
1309 sclk_rdiv = sclk_rdiv_map[temp2];
1310
1311 if (!prediv || !sysdiv || !pll_rdiv || !bit_div2x)
1312 return -EINVAL;
1313
1314 VCO = xvclk * multiplier / prediv;
1315
1316 sysclk = VCO / sysdiv / pll_rdiv * 2 / bit_div2x / sclk_rdiv;
1317
1318 return sysclk;
1319 }
1320
ov5640_set_night_mode(struct ov5640_dev * sensor)1321 static int ov5640_set_night_mode(struct ov5640_dev *sensor)
1322 {
1323 /* read HTS from register settings */
1324 u8 mode;
1325 int ret;
1326
1327 ret = ov5640_read_reg(sensor, OV5640_REG_AEC_CTRL00, &mode);
1328 if (ret)
1329 return ret;
1330 mode &= 0xfb;
1331 return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL00, mode);
1332 }
1333
ov5640_get_hts(struct ov5640_dev * sensor)1334 static int ov5640_get_hts(struct ov5640_dev *sensor)
1335 {
1336 /* read HTS from register settings */
1337 u16 hts;
1338 int ret;
1339
1340 ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_HTS, &hts);
1341 if (ret)
1342 return ret;
1343 return hts;
1344 }
1345
ov5640_get_vts(struct ov5640_dev * sensor)1346 static int ov5640_get_vts(struct ov5640_dev *sensor)
1347 {
1348 u16 vts;
1349 int ret;
1350
1351 ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_VTS, &vts);
1352 if (ret)
1353 return ret;
1354 return vts;
1355 }
1356
ov5640_set_vts(struct ov5640_dev * sensor,int vts)1357 static int ov5640_set_vts(struct ov5640_dev *sensor, int vts)
1358 {
1359 return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, vts);
1360 }
1361
ov5640_get_light_freq(struct ov5640_dev * sensor)1362 static int ov5640_get_light_freq(struct ov5640_dev *sensor)
1363 {
1364 /* get banding filter value */
1365 int ret, light_freq = 0;
1366 u8 temp, temp1;
1367
1368 ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL01, &temp);
1369 if (ret)
1370 return ret;
1371
1372 if (temp & 0x80) {
1373 /* manual */
1374 ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL00,
1375 &temp1);
1376 if (ret)
1377 return ret;
1378 if (temp1 & 0x04) {
1379 /* 50Hz */
1380 light_freq = 50;
1381 } else {
1382 /* 60Hz */
1383 light_freq = 60;
1384 }
1385 } else {
1386 /* auto */
1387 ret = ov5640_read_reg(sensor, OV5640_REG_SIGMADELTA_CTRL0C,
1388 &temp1);
1389 if (ret)
1390 return ret;
1391
1392 if (temp1 & 0x01) {
1393 /* 50Hz */
1394 light_freq = 50;
1395 } else {
1396 /* 60Hz */
1397 }
1398 }
1399
1400 return light_freq;
1401 }
1402
ov5640_set_bandingfilter(struct ov5640_dev * sensor)1403 static int ov5640_set_bandingfilter(struct ov5640_dev *sensor)
1404 {
1405 u32 band_step60, max_band60, band_step50, max_band50, prev_vts;
1406 int ret;
1407
1408 /* read preview PCLK */
1409 ret = ov5640_get_sysclk(sensor);
1410 if (ret < 0)
1411 return ret;
1412 if (ret == 0)
1413 return -EINVAL;
1414 sensor->prev_sysclk = ret;
1415 /* read preview HTS */
1416 ret = ov5640_get_hts(sensor);
1417 if (ret < 0)
1418 return ret;
1419 if (ret == 0)
1420 return -EINVAL;
1421 sensor->prev_hts = ret;
1422
1423 /* read preview VTS */
1424 ret = ov5640_get_vts(sensor);
1425 if (ret < 0)
1426 return ret;
1427 prev_vts = ret;
1428
1429 /* calculate banding filter */
1430 /* 60Hz */
1431 band_step60 = sensor->prev_sysclk * 100 / sensor->prev_hts * 100 / 120;
1432 ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B60_STEP, band_step60);
1433 if (ret)
1434 return ret;
1435 if (!band_step60)
1436 return -EINVAL;
1437 max_band60 = (int)((prev_vts - 4) / band_step60);
1438 ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0D, max_band60);
1439 if (ret)
1440 return ret;
1441
1442 /* 50Hz */
1443 band_step50 = sensor->prev_sysclk * 100 / sensor->prev_hts;
1444 ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B50_STEP, band_step50);
1445 if (ret)
1446 return ret;
1447 if (!band_step50)
1448 return -EINVAL;
1449 max_band50 = (int)((prev_vts - 4) / band_step50);
1450 return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0E, max_band50);
1451 }
1452
ov5640_set_ae_target(struct ov5640_dev * sensor,int target)1453 static int ov5640_set_ae_target(struct ov5640_dev *sensor, int target)
1454 {
1455 /* stable in high */
1456 u32 fast_high, fast_low;
1457 int ret;
1458
1459 sensor->ae_low = target * 23 / 25; /* 0.92 */
1460 sensor->ae_high = target * 27 / 25; /* 1.08 */
1461
1462 fast_high = sensor->ae_high << 1;
1463 if (fast_high > 255)
1464 fast_high = 255;
1465
1466 fast_low = sensor->ae_low >> 1;
1467
1468 ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0F, sensor->ae_high);
1469 if (ret)
1470 return ret;
1471 ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL10, sensor->ae_low);
1472 if (ret)
1473 return ret;
1474 ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1B, sensor->ae_high);
1475 if (ret)
1476 return ret;
1477 ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1E, sensor->ae_low);
1478 if (ret)
1479 return ret;
1480 ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL11, fast_high);
1481 if (ret)
1482 return ret;
1483 return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1F, fast_low);
1484 }
1485
ov5640_get_binning(struct ov5640_dev * sensor)1486 static int ov5640_get_binning(struct ov5640_dev *sensor)
1487 {
1488 u8 temp;
1489 int ret;
1490
1491 ret = ov5640_read_reg(sensor, OV5640_REG_TIMING_TC_REG21, &temp);
1492 if (ret)
1493 return ret;
1494
1495 return temp & BIT(0);
1496 }
1497
ov5640_set_binning(struct ov5640_dev * sensor,bool enable)1498 static int ov5640_set_binning(struct ov5640_dev *sensor, bool enable)
1499 {
1500 int ret;
1501
1502 /*
1503 * TIMING TC REG21:
1504 * - [0]: Horizontal binning enable
1505 */
1506 ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
1507 BIT(0), enable ? BIT(0) : 0);
1508 if (ret)
1509 return ret;
1510 /*
1511 * TIMING TC REG20:
1512 * - [0]: Undocumented, but hardcoded init sequences
1513 * are always setting REG21/REG20 bit 0 to same value...
1514 */
1515 return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
1516 BIT(0), enable ? BIT(0) : 0);
1517 }
1518
ov5640_set_virtual_channel(struct ov5640_dev * sensor)1519 static int ov5640_set_virtual_channel(struct ov5640_dev *sensor)
1520 {
1521 struct i2c_client *client = sensor->i2c_client;
1522 u8 temp, channel = virtual_channel;
1523 int ret;
1524
1525 if (channel > 3) {
1526 dev_err(&client->dev,
1527 "%s: wrong virtual_channel parameter, expected (0..3), got %d\n",
1528 __func__, channel);
1529 return -EINVAL;
1530 }
1531
1532 ret = ov5640_read_reg(sensor, OV5640_REG_DEBUG_MODE, &temp);
1533 if (ret)
1534 return ret;
1535 temp &= ~(3 << 6);
1536 temp |= (channel << 6);
1537 return ov5640_write_reg(sensor, OV5640_REG_DEBUG_MODE, temp);
1538 }
1539
1540 static const struct ov5640_mode_info *
ov5640_find_mode(struct ov5640_dev * sensor,enum ov5640_frame_rate fr,int width,int height,bool nearest)1541 ov5640_find_mode(struct ov5640_dev *sensor, enum ov5640_frame_rate fr,
1542 int width, int height, bool nearest)
1543 {
1544 const struct ov5640_mode_info *mode;
1545
1546 mode = v4l2_find_nearest_size(ov5640_mode_data,
1547 ARRAY_SIZE(ov5640_mode_data),
1548 hact, vact,
1549 width, height);
1550
1551 if (!mode ||
1552 (!nearest && (mode->hact != width || mode->vact != height)))
1553 return NULL;
1554
1555 /* Check to see if the current mode exceeds the max frame rate */
1556 if (ov5640_framerates[fr] > ov5640_framerates[mode->max_fps])
1557 return NULL;
1558
1559 return mode;
1560 }
1561
ov5640_calc_pixel_rate(struct ov5640_dev * sensor)1562 static u64 ov5640_calc_pixel_rate(struct ov5640_dev *sensor)
1563 {
1564 u64 rate;
1565
1566 rate = sensor->current_mode->vtot * sensor->current_mode->htot;
1567 rate *= ov5640_framerates[sensor->current_fr];
1568
1569 return rate;
1570 }
1571
1572 /*
1573 * sensor changes between scaling and subsampling, go through
1574 * exposure calculation
1575 */
ov5640_set_mode_exposure_calc(struct ov5640_dev * sensor,const struct ov5640_mode_info * mode)1576 static int ov5640_set_mode_exposure_calc(struct ov5640_dev *sensor,
1577 const struct ov5640_mode_info *mode)
1578 {
1579 u32 prev_shutter, prev_gain16;
1580 u32 cap_shutter, cap_gain16;
1581 u32 cap_sysclk, cap_hts, cap_vts;
1582 u32 light_freq, cap_bandfilt, cap_maxband;
1583 u32 cap_gain16_shutter;
1584 u8 average;
1585 int ret;
1586
1587 if (!mode->reg_data)
1588 return -EINVAL;
1589
1590 /* read preview shutter */
1591 ret = ov5640_get_exposure(sensor);
1592 if (ret < 0)
1593 return ret;
1594 prev_shutter = ret;
1595 ret = ov5640_get_binning(sensor);
1596 if (ret < 0)
1597 return ret;
1598 if (ret && mode->id != OV5640_MODE_720P_1280_720 &&
1599 mode->id != OV5640_MODE_1080P_1920_1080)
1600 prev_shutter *= 2;
1601
1602 /* read preview gain */
1603 ret = ov5640_get_gain(sensor);
1604 if (ret < 0)
1605 return ret;
1606 prev_gain16 = ret;
1607
1608 /* get average */
1609 ret = ov5640_read_reg(sensor, OV5640_REG_AVG_READOUT, &average);
1610 if (ret)
1611 return ret;
1612
1613 /* turn off night mode for capture */
1614 ret = ov5640_set_night_mode(sensor);
1615 if (ret < 0)
1616 return ret;
1617
1618 /* Write capture setting */
1619 ret = ov5640_load_regs(sensor, mode);
1620 if (ret < 0)
1621 return ret;
1622
1623 /* read capture VTS */
1624 ret = ov5640_get_vts(sensor);
1625 if (ret < 0)
1626 return ret;
1627 cap_vts = ret;
1628 ret = ov5640_get_hts(sensor);
1629 if (ret < 0)
1630 return ret;
1631 if (ret == 0)
1632 return -EINVAL;
1633 cap_hts = ret;
1634
1635 ret = ov5640_get_sysclk(sensor);
1636 if (ret < 0)
1637 return ret;
1638 if (ret == 0)
1639 return -EINVAL;
1640 cap_sysclk = ret;
1641
1642 /* calculate capture banding filter */
1643 ret = ov5640_get_light_freq(sensor);
1644 if (ret < 0)
1645 return ret;
1646 light_freq = ret;
1647
1648 if (light_freq == 60) {
1649 /* 60Hz */
1650 cap_bandfilt = cap_sysclk * 100 / cap_hts * 100 / 120;
1651 } else {
1652 /* 50Hz */
1653 cap_bandfilt = cap_sysclk * 100 / cap_hts;
1654 }
1655
1656 if (!sensor->prev_sysclk) {
1657 ret = ov5640_get_sysclk(sensor);
1658 if (ret < 0)
1659 return ret;
1660 if (ret == 0)
1661 return -EINVAL;
1662 sensor->prev_sysclk = ret;
1663 }
1664
1665 if (!cap_bandfilt)
1666 return -EINVAL;
1667
1668 cap_maxband = (int)((cap_vts - 4) / cap_bandfilt);
1669
1670 /* calculate capture shutter/gain16 */
1671 if (average > sensor->ae_low && average < sensor->ae_high) {
1672 /* in stable range */
1673 cap_gain16_shutter =
1674 prev_gain16 * prev_shutter *
1675 cap_sysclk / sensor->prev_sysclk *
1676 sensor->prev_hts / cap_hts *
1677 sensor->ae_target / average;
1678 } else {
1679 cap_gain16_shutter =
1680 prev_gain16 * prev_shutter *
1681 cap_sysclk / sensor->prev_sysclk *
1682 sensor->prev_hts / cap_hts;
1683 }
1684
1685 /* gain to shutter */
1686 if (cap_gain16_shutter < (cap_bandfilt * 16)) {
1687 /* shutter < 1/100 */
1688 cap_shutter = cap_gain16_shutter / 16;
1689 if (cap_shutter < 1)
1690 cap_shutter = 1;
1691
1692 cap_gain16 = cap_gain16_shutter / cap_shutter;
1693 if (cap_gain16 < 16)
1694 cap_gain16 = 16;
1695 } else {
1696 if (cap_gain16_shutter > (cap_bandfilt * cap_maxband * 16)) {
1697 /* exposure reach max */
1698 cap_shutter = cap_bandfilt * cap_maxband;
1699 if (!cap_shutter)
1700 return -EINVAL;
1701
1702 cap_gain16 = cap_gain16_shutter / cap_shutter;
1703 } else {
1704 /* 1/100 < (cap_shutter = n/100) =< max */
1705 cap_shutter =
1706 ((int)(cap_gain16_shutter / 16 / cap_bandfilt))
1707 * cap_bandfilt;
1708 if (!cap_shutter)
1709 return -EINVAL;
1710
1711 cap_gain16 = cap_gain16_shutter / cap_shutter;
1712 }
1713 }
1714
1715 /* set capture gain */
1716 ret = ov5640_set_gain(sensor, cap_gain16);
1717 if (ret)
1718 return ret;
1719
1720 /* write capture shutter */
1721 if (cap_shutter > (cap_vts - 4)) {
1722 cap_vts = cap_shutter + 4;
1723 ret = ov5640_set_vts(sensor, cap_vts);
1724 if (ret < 0)
1725 return ret;
1726 }
1727
1728 /* set exposure */
1729 return ov5640_set_exposure(sensor, cap_shutter);
1730 }
1731
1732 /*
1733 * if sensor changes inside scaling or subsampling
1734 * change mode directly
1735 */
ov5640_set_mode_direct(struct ov5640_dev * sensor,const struct ov5640_mode_info * mode)1736 static int ov5640_set_mode_direct(struct ov5640_dev *sensor,
1737 const struct ov5640_mode_info *mode)
1738 {
1739 if (!mode->reg_data)
1740 return -EINVAL;
1741
1742 /* Write capture setting */
1743 return ov5640_load_regs(sensor, mode);
1744 }
1745
ov5640_set_mode(struct ov5640_dev * sensor)1746 static int ov5640_set_mode(struct ov5640_dev *sensor)
1747 {
1748 const struct ov5640_mode_info *mode = sensor->current_mode;
1749 const struct ov5640_mode_info *orig_mode = sensor->last_mode;
1750 enum ov5640_downsize_mode dn_mode, orig_dn_mode;
1751 bool auto_gain = sensor->ctrls.auto_gain->val == 1;
1752 bool auto_exp = sensor->ctrls.auto_exp->val == V4L2_EXPOSURE_AUTO;
1753 unsigned long rate;
1754 int ret;
1755
1756 dn_mode = mode->dn_mode;
1757 orig_dn_mode = orig_mode->dn_mode;
1758
1759 /* auto gain and exposure must be turned off when changing modes */
1760 if (auto_gain) {
1761 ret = ov5640_set_autogain(sensor, false);
1762 if (ret)
1763 return ret;
1764 }
1765
1766 if (auto_exp) {
1767 ret = ov5640_set_autoexposure(sensor, false);
1768 if (ret)
1769 goto restore_auto_gain;
1770 }
1771
1772 /*
1773 * All the formats we support have 16 bits per pixel, seems to require
1774 * the same rate than YUV, so we can just use 16 bpp all the time.
1775 */
1776 rate = ov5640_calc_pixel_rate(sensor) * 16;
1777 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
1778 rate = rate / sensor->ep.bus.mipi_csi2.num_data_lanes;
1779 ret = ov5640_set_mipi_pclk(sensor, rate);
1780 } else {
1781 rate = rate / sensor->ep.bus.parallel.bus_width;
1782 ret = ov5640_set_dvp_pclk(sensor, rate);
1783 }
1784
1785 if (ret < 0)
1786 return 0;
1787
1788 if ((dn_mode == SUBSAMPLING && orig_dn_mode == SCALING) ||
1789 (dn_mode == SCALING && orig_dn_mode == SUBSAMPLING)) {
1790 /*
1791 * change between subsampling and scaling
1792 * go through exposure calculation
1793 */
1794 ret = ov5640_set_mode_exposure_calc(sensor, mode);
1795 } else {
1796 /*
1797 * change inside subsampling or scaling
1798 * download firmware directly
1799 */
1800 ret = ov5640_set_mode_direct(sensor, mode);
1801 }
1802 if (ret < 0)
1803 goto restore_auto_exp_gain;
1804
1805 /* restore auto gain and exposure */
1806 if (auto_gain)
1807 ov5640_set_autogain(sensor, true);
1808 if (auto_exp)
1809 ov5640_set_autoexposure(sensor, true);
1810
1811 ret = ov5640_set_binning(sensor, dn_mode != SCALING);
1812 if (ret < 0)
1813 return ret;
1814 ret = ov5640_set_ae_target(sensor, sensor->ae_target);
1815 if (ret < 0)
1816 return ret;
1817 ret = ov5640_get_light_freq(sensor);
1818 if (ret < 0)
1819 return ret;
1820 ret = ov5640_set_bandingfilter(sensor);
1821 if (ret < 0)
1822 return ret;
1823 ret = ov5640_set_virtual_channel(sensor);
1824 if (ret < 0)
1825 return ret;
1826
1827 sensor->pending_mode_change = false;
1828 sensor->last_mode = mode;
1829
1830 return 0;
1831
1832 restore_auto_exp_gain:
1833 if (auto_exp)
1834 ov5640_set_autoexposure(sensor, true);
1835 restore_auto_gain:
1836 if (auto_gain)
1837 ov5640_set_autogain(sensor, true);
1838
1839 return ret;
1840 }
1841
1842 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
1843 struct v4l2_mbus_framefmt *format);
1844
1845 /* restore the last set video mode after chip power-on */
ov5640_restore_mode(struct ov5640_dev * sensor)1846 static int ov5640_restore_mode(struct ov5640_dev *sensor)
1847 {
1848 int ret;
1849
1850 /* first load the initial register values */
1851 ret = ov5640_load_regs(sensor, &ov5640_mode_init_data);
1852 if (ret < 0)
1853 return ret;
1854 sensor->last_mode = &ov5640_mode_init_data;
1855
1856 ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x3f,
1857 (ilog2(OV5640_SCLK2X_ROOT_DIV) << 2) |
1858 ilog2(OV5640_SCLK_ROOT_DIV));
1859 if (ret)
1860 return ret;
1861
1862 /* now restore the last capture mode */
1863 ret = ov5640_set_mode(sensor);
1864 if (ret < 0)
1865 return ret;
1866
1867 return ov5640_set_framefmt(sensor, &sensor->fmt);
1868 }
1869
ov5640_power(struct ov5640_dev * sensor,bool enable)1870 static void ov5640_power(struct ov5640_dev *sensor, bool enable)
1871 {
1872 gpiod_set_value_cansleep(sensor->pwdn_gpio, enable ? 0 : 1);
1873 }
1874
ov5640_reset(struct ov5640_dev * sensor)1875 static void ov5640_reset(struct ov5640_dev *sensor)
1876 {
1877 if (!sensor->reset_gpio)
1878 return;
1879
1880 gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1881
1882 /* camera power cycle */
1883 ov5640_power(sensor, false);
1884 usleep_range(5000, 10000);
1885 ov5640_power(sensor, true);
1886 usleep_range(5000, 10000);
1887
1888 gpiod_set_value_cansleep(sensor->reset_gpio, 1);
1889 usleep_range(1000, 2000);
1890
1891 gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1892 usleep_range(20000, 25000);
1893 }
1894
ov5640_set_power_on(struct ov5640_dev * sensor)1895 static int ov5640_set_power_on(struct ov5640_dev *sensor)
1896 {
1897 struct i2c_client *client = sensor->i2c_client;
1898 int ret;
1899
1900 ret = clk_prepare_enable(sensor->xclk);
1901 if (ret) {
1902 dev_err(&client->dev, "%s: failed to enable clock\n",
1903 __func__);
1904 return ret;
1905 }
1906
1907 ret = regulator_bulk_enable(OV5640_NUM_SUPPLIES,
1908 sensor->supplies);
1909 if (ret) {
1910 dev_err(&client->dev, "%s: failed to enable regulators\n",
1911 __func__);
1912 goto xclk_off;
1913 }
1914
1915 ov5640_reset(sensor);
1916 ov5640_power(sensor, true);
1917
1918 ret = ov5640_init_slave_id(sensor);
1919 if (ret)
1920 goto power_off;
1921
1922 return 0;
1923
1924 power_off:
1925 ov5640_power(sensor, false);
1926 regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1927 xclk_off:
1928 clk_disable_unprepare(sensor->xclk);
1929 return ret;
1930 }
1931
ov5640_set_power_off(struct ov5640_dev * sensor)1932 static void ov5640_set_power_off(struct ov5640_dev *sensor)
1933 {
1934 ov5640_power(sensor, false);
1935 regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1936 clk_disable_unprepare(sensor->xclk);
1937 }
1938
ov5640_set_power_mipi(struct ov5640_dev * sensor,bool on)1939 static int ov5640_set_power_mipi(struct ov5640_dev *sensor, bool on)
1940 {
1941 int ret;
1942
1943 if (!on) {
1944 /* Reset MIPI bus settings to their default values. */
1945 ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x58);
1946 ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x04);
1947 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x00);
1948 return 0;
1949 }
1950
1951 /*
1952 * Power up MIPI HS Tx and LS Rx; 2 data lanes mode
1953 *
1954 * 0x300e = 0x40
1955 * [7:5] = 010 : 2 data lanes mode (see FIXME note in
1956 * "ov5640_set_stream_mipi()")
1957 * [4] = 0 : Power up MIPI HS Tx
1958 * [3] = 0 : Power up MIPI LS Rx
1959 * [2] = 0 : MIPI interface disabled
1960 */
1961 ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x40);
1962 if (ret)
1963 return ret;
1964
1965 /*
1966 * Gate clock and set LP11 in 'no packets mode' (idle)
1967 *
1968 * 0x4800 = 0x24
1969 * [5] = 1 : Gate clock when 'no packets'
1970 * [2] = 1 : MIPI bus in LP11 when 'no packets'
1971 */
1972 ret = ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x24);
1973 if (ret)
1974 return ret;
1975
1976 /*
1977 * Set data lanes and clock in LP11 when 'sleeping'
1978 *
1979 * 0x3019 = 0x70
1980 * [6] = 1 : MIPI data lane 2 in LP11 when 'sleeping'
1981 * [5] = 1 : MIPI data lane 1 in LP11 when 'sleeping'
1982 * [4] = 1 : MIPI clock lane in LP11 when 'sleeping'
1983 */
1984 ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x70);
1985 if (ret)
1986 return ret;
1987
1988 /* Give lanes some time to coax into LP11 state. */
1989 usleep_range(500, 1000);
1990
1991 return 0;
1992 }
1993
ov5640_set_power_dvp(struct ov5640_dev * sensor,bool on)1994 static int ov5640_set_power_dvp(struct ov5640_dev *sensor, bool on)
1995 {
1996 unsigned int flags = sensor->ep.bus.parallel.flags;
1997 u8 pclk_pol = 0;
1998 u8 hsync_pol = 0;
1999 u8 vsync_pol = 0;
2000 int ret;
2001
2002 if (!on) {
2003 /* Reset settings to their default values. */
2004 ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x58);
2005 ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00, 0x20);
2006 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01, 0x00);
2007 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE02, 0x00);
2008 return 0;
2009 }
2010
2011 /*
2012 * Note about parallel port configuration.
2013 *
2014 * When configured in parallel mode, the OV5640 will
2015 * output 10 bits data on DVP data lines [9:0].
2016 * If only 8 bits data are wanted, the 8 bits data lines
2017 * of the camera interface must be physically connected
2018 * on the DVP data lines [9:2].
2019 *
2020 * Control lines polarity can be configured through
2021 * devicetree endpoint control lines properties.
2022 * If no endpoint control lines properties are set,
2023 * polarity will be as below:
2024 * - VSYNC: active high
2025 * - HREF: active low
2026 * - PCLK: active low
2027 */
2028 /*
2029 * configure parallel port control lines polarity
2030 *
2031 * POLARITY CTRL0
2032 * - [5]: PCLK polarity (0: active low, 1: active high)
2033 * - [1]: HREF polarity (0: active low, 1: active high)
2034 * - [0]: VSYNC polarity (mismatch here between
2035 * datasheet and hardware, 0 is active high
2036 * and 1 is active low...)
2037 */
2038 if (sensor->ep.bus_type == V4L2_MBUS_PARALLEL) {
2039 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
2040 pclk_pol = 1;
2041 if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
2042 hsync_pol = 1;
2043 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
2044 vsync_pol = 1;
2045
2046 ret = ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00,
2047 (pclk_pol << 5) | (hsync_pol << 1) |
2048 vsync_pol);
2049
2050 if (ret)
2051 return ret;
2052 }
2053
2054 /*
2055 * powerdown MIPI TX/RX PHY & disable MIPI
2056 *
2057 * MIPI CONTROL 00
2058 * 4: PWDN PHY TX
2059 * 3: PWDN PHY RX
2060 * 2: MIPI enable
2061 */
2062 ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x18);
2063 if (ret)
2064 return ret;
2065
2066 /*
2067 * enable VSYNC/HREF/PCLK DVP control lines
2068 * & D[9:6] DVP data lines
2069 *
2070 * PAD OUTPUT ENABLE 01
2071 * - 6: VSYNC output enable
2072 * - 5: HREF output enable
2073 * - 4: PCLK output enable
2074 * - [3:0]: D[9:6] output enable
2075 */
2076 ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01,
2077 sensor->ep.bus_type == V4L2_MBUS_PARALLEL ?
2078 0x7f : 0x1f);
2079 if (ret)
2080 return ret;
2081
2082 /*
2083 * enable D[5:0] DVP data lines
2084 *
2085 * PAD OUTPUT ENABLE 02
2086 * - [7:2]: D[5:0] output enable
2087 */
2088 return ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE02, 0xfc);
2089 }
2090
ov5640_set_power(struct ov5640_dev * sensor,bool on)2091 static int ov5640_set_power(struct ov5640_dev *sensor, bool on)
2092 {
2093 int ret = 0;
2094
2095 if (on) {
2096 ret = ov5640_set_power_on(sensor);
2097 if (ret)
2098 return ret;
2099
2100 ret = ov5640_restore_mode(sensor);
2101 if (ret)
2102 goto power_off;
2103 }
2104
2105 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
2106 ret = ov5640_set_power_mipi(sensor, on);
2107 else
2108 ret = ov5640_set_power_dvp(sensor, on);
2109 if (ret)
2110 goto power_off;
2111
2112 if (!on)
2113 ov5640_set_power_off(sensor);
2114
2115 return 0;
2116
2117 power_off:
2118 ov5640_set_power_off(sensor);
2119 return ret;
2120 }
2121
2122 /* --------------- Subdev Operations --------------- */
2123
ov5640_s_power(struct v4l2_subdev * sd,int on)2124 static int ov5640_s_power(struct v4l2_subdev *sd, int on)
2125 {
2126 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2127 int ret = 0;
2128
2129 mutex_lock(&sensor->lock);
2130
2131 /*
2132 * If the power count is modified from 0 to != 0 or from != 0 to 0,
2133 * update the power state.
2134 */
2135 if (sensor->power_count == !on) {
2136 ret = ov5640_set_power(sensor, !!on);
2137 if (ret)
2138 goto out;
2139 }
2140
2141 /* Update the power count. */
2142 sensor->power_count += on ? 1 : -1;
2143 WARN_ON(sensor->power_count < 0);
2144 out:
2145 mutex_unlock(&sensor->lock);
2146
2147 if (on && !ret && sensor->power_count == 1) {
2148 /* restore controls */
2149 ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
2150 }
2151
2152 return ret;
2153 }
2154
ov5640_try_frame_interval(struct ov5640_dev * sensor,struct v4l2_fract * fi,u32 width,u32 height)2155 static int ov5640_try_frame_interval(struct ov5640_dev *sensor,
2156 struct v4l2_fract *fi,
2157 u32 width, u32 height)
2158 {
2159 const struct ov5640_mode_info *mode;
2160 enum ov5640_frame_rate rate = OV5640_15_FPS;
2161 int minfps, maxfps, best_fps, fps;
2162 int i;
2163
2164 minfps = ov5640_framerates[OV5640_15_FPS];
2165 maxfps = ov5640_framerates[OV5640_60_FPS];
2166
2167 if (fi->numerator == 0) {
2168 fi->denominator = maxfps;
2169 fi->numerator = 1;
2170 rate = OV5640_60_FPS;
2171 goto find_mode;
2172 }
2173
2174 fps = clamp_val(DIV_ROUND_CLOSEST(fi->denominator, fi->numerator),
2175 minfps, maxfps);
2176
2177 best_fps = minfps;
2178 for (i = 0; i < ARRAY_SIZE(ov5640_framerates); i++) {
2179 int curr_fps = ov5640_framerates[i];
2180
2181 if (abs(curr_fps - fps) < abs(best_fps - fps)) {
2182 best_fps = curr_fps;
2183 rate = i;
2184 }
2185 }
2186
2187 fi->numerator = 1;
2188 fi->denominator = best_fps;
2189
2190 find_mode:
2191 mode = ov5640_find_mode(sensor, rate, width, height, false);
2192 return mode ? rate : -EINVAL;
2193 }
2194
ov5640_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)2195 static int ov5640_get_fmt(struct v4l2_subdev *sd,
2196 struct v4l2_subdev_pad_config *cfg,
2197 struct v4l2_subdev_format *format)
2198 {
2199 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2200 struct v4l2_mbus_framefmt *fmt;
2201
2202 if (format->pad != 0)
2203 return -EINVAL;
2204
2205 mutex_lock(&sensor->lock);
2206
2207 if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2208 fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg,
2209 format->pad);
2210 else
2211 fmt = &sensor->fmt;
2212
2213 format->format = *fmt;
2214
2215 mutex_unlock(&sensor->lock);
2216
2217 return 0;
2218 }
2219
ov5640_try_fmt_internal(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * fmt,enum ov5640_frame_rate fr,const struct ov5640_mode_info ** new_mode)2220 static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
2221 struct v4l2_mbus_framefmt *fmt,
2222 enum ov5640_frame_rate fr,
2223 const struct ov5640_mode_info **new_mode)
2224 {
2225 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2226 const struct ov5640_mode_info *mode;
2227 int i;
2228
2229 mode = ov5640_find_mode(sensor, fr, fmt->width, fmt->height, true);
2230 if (!mode)
2231 return -EINVAL;
2232 fmt->width = mode->hact;
2233 fmt->height = mode->vact;
2234
2235 if (new_mode)
2236 *new_mode = mode;
2237
2238 for (i = 0; i < ARRAY_SIZE(ov5640_formats); i++)
2239 if (ov5640_formats[i].code == fmt->code)
2240 break;
2241 if (i >= ARRAY_SIZE(ov5640_formats))
2242 i = 0;
2243
2244 fmt->code = ov5640_formats[i].code;
2245 fmt->colorspace = ov5640_formats[i].colorspace;
2246 fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
2247 fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
2248 fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
2249
2250 return 0;
2251 }
2252
ov5640_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)2253 static int ov5640_set_fmt(struct v4l2_subdev *sd,
2254 struct v4l2_subdev_pad_config *cfg,
2255 struct v4l2_subdev_format *format)
2256 {
2257 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2258 const struct ov5640_mode_info *new_mode;
2259 struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
2260 struct v4l2_mbus_framefmt *fmt;
2261 int ret;
2262
2263 if (format->pad != 0)
2264 return -EINVAL;
2265
2266 mutex_lock(&sensor->lock);
2267
2268 if (sensor->streaming) {
2269 ret = -EBUSY;
2270 goto out;
2271 }
2272
2273 ret = ov5640_try_fmt_internal(sd, mbus_fmt,
2274 sensor->current_fr, &new_mode);
2275 if (ret)
2276 goto out;
2277
2278 if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2279 fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
2280 else
2281 fmt = &sensor->fmt;
2282
2283 *fmt = *mbus_fmt;
2284
2285 if (new_mode != sensor->current_mode) {
2286 sensor->current_mode = new_mode;
2287 sensor->pending_mode_change = true;
2288 }
2289 if (mbus_fmt->code != sensor->fmt.code)
2290 sensor->pending_fmt_change = true;
2291
2292 __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
2293 ov5640_calc_pixel_rate(sensor));
2294 out:
2295 mutex_unlock(&sensor->lock);
2296 return ret;
2297 }
2298
ov5640_set_framefmt(struct ov5640_dev * sensor,struct v4l2_mbus_framefmt * format)2299 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
2300 struct v4l2_mbus_framefmt *format)
2301 {
2302 int ret = 0;
2303 bool is_jpeg = false;
2304 u8 fmt, mux;
2305
2306 switch (format->code) {
2307 case MEDIA_BUS_FMT_UYVY8_2X8:
2308 /* YUV422, UYVY */
2309 fmt = 0x3f;
2310 mux = OV5640_FMT_MUX_YUV422;
2311 break;
2312 case MEDIA_BUS_FMT_YUYV8_2X8:
2313 /* YUV422, YUYV */
2314 fmt = 0x30;
2315 mux = OV5640_FMT_MUX_YUV422;
2316 break;
2317 case MEDIA_BUS_FMT_RGB565_2X8_LE:
2318 /* RGB565 {g[2:0],b[4:0]},{r[4:0],g[5:3]} */
2319 fmt = 0x6F;
2320 mux = OV5640_FMT_MUX_RGB;
2321 break;
2322 case MEDIA_BUS_FMT_RGB565_2X8_BE:
2323 /* RGB565 {r[4:0],g[5:3]},{g[2:0],b[4:0]} */
2324 fmt = 0x61;
2325 mux = OV5640_FMT_MUX_RGB;
2326 break;
2327 case MEDIA_BUS_FMT_JPEG_1X8:
2328 /* YUV422, YUYV */
2329 fmt = 0x30;
2330 mux = OV5640_FMT_MUX_YUV422;
2331 is_jpeg = true;
2332 break;
2333 case MEDIA_BUS_FMT_SBGGR8_1X8:
2334 /* Raw, BGBG... / GRGR... */
2335 fmt = 0x00;
2336 mux = OV5640_FMT_MUX_RAW_DPC;
2337 break;
2338 case MEDIA_BUS_FMT_SGBRG8_1X8:
2339 /* Raw bayer, GBGB... / RGRG... */
2340 fmt = 0x01;
2341 mux = OV5640_FMT_MUX_RAW_DPC;
2342 break;
2343 case MEDIA_BUS_FMT_SGRBG8_1X8:
2344 /* Raw bayer, GRGR... / BGBG... */
2345 fmt = 0x02;
2346 mux = OV5640_FMT_MUX_RAW_DPC;
2347 break;
2348 case MEDIA_BUS_FMT_SRGGB8_1X8:
2349 /* Raw bayer, RGRG... / GBGB... */
2350 fmt = 0x03;
2351 mux = OV5640_FMT_MUX_RAW_DPC;
2352 break;
2353 default:
2354 return -EINVAL;
2355 }
2356
2357 /* FORMAT CONTROL00: YUV and RGB formatting */
2358 ret = ov5640_write_reg(sensor, OV5640_REG_FORMAT_CONTROL00, fmt);
2359 if (ret)
2360 return ret;
2361
2362 /* FORMAT MUX CONTROL: ISP YUV or RGB */
2363 ret = ov5640_write_reg(sensor, OV5640_REG_ISP_FORMAT_MUX_CTRL, mux);
2364 if (ret)
2365 return ret;
2366
2367 /*
2368 * TIMING TC REG21:
2369 * - [5]: JPEG enable
2370 */
2371 ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2372 BIT(5), is_jpeg ? BIT(5) : 0);
2373 if (ret)
2374 return ret;
2375
2376 /*
2377 * SYSTEM RESET02:
2378 * - [4]: Reset JFIFO
2379 * - [3]: Reset SFIFO
2380 * - [2]: Reset JPEG
2381 */
2382 ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_RESET02,
2383 BIT(4) | BIT(3) | BIT(2),
2384 is_jpeg ? 0 : (BIT(4) | BIT(3) | BIT(2)));
2385 if (ret)
2386 return ret;
2387
2388 /*
2389 * CLOCK ENABLE02:
2390 * - [5]: Enable JPEG 2x clock
2391 * - [3]: Enable JPEG clock
2392 */
2393 return ov5640_mod_reg(sensor, OV5640_REG_SYS_CLOCK_ENABLE02,
2394 BIT(5) | BIT(3),
2395 is_jpeg ? (BIT(5) | BIT(3)) : 0);
2396 }
2397
2398 /*
2399 * Sensor Controls.
2400 */
2401
ov5640_set_ctrl_hue(struct ov5640_dev * sensor,int value)2402 static int ov5640_set_ctrl_hue(struct ov5640_dev *sensor, int value)
2403 {
2404 int ret;
2405
2406 if (value) {
2407 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2408 BIT(0), BIT(0));
2409 if (ret)
2410 return ret;
2411 ret = ov5640_write_reg16(sensor, OV5640_REG_SDE_CTRL1, value);
2412 } else {
2413 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(0), 0);
2414 }
2415
2416 return ret;
2417 }
2418
ov5640_set_ctrl_contrast(struct ov5640_dev * sensor,int value)2419 static int ov5640_set_ctrl_contrast(struct ov5640_dev *sensor, int value)
2420 {
2421 int ret;
2422
2423 if (value) {
2424 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2425 BIT(2), BIT(2));
2426 if (ret)
2427 return ret;
2428 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL5,
2429 value & 0xff);
2430 } else {
2431 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(2), 0);
2432 }
2433
2434 return ret;
2435 }
2436
ov5640_set_ctrl_saturation(struct ov5640_dev * sensor,int value)2437 static int ov5640_set_ctrl_saturation(struct ov5640_dev *sensor, int value)
2438 {
2439 int ret;
2440
2441 if (value) {
2442 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2443 BIT(1), BIT(1));
2444 if (ret)
2445 return ret;
2446 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL3,
2447 value & 0xff);
2448 if (ret)
2449 return ret;
2450 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL4,
2451 value & 0xff);
2452 } else {
2453 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(1), 0);
2454 }
2455
2456 return ret;
2457 }
2458
ov5640_set_ctrl_white_balance(struct ov5640_dev * sensor,int awb)2459 static int ov5640_set_ctrl_white_balance(struct ov5640_dev *sensor, int awb)
2460 {
2461 int ret;
2462
2463 ret = ov5640_mod_reg(sensor, OV5640_REG_AWB_MANUAL_CTRL,
2464 BIT(0), awb ? 0 : 1);
2465 if (ret)
2466 return ret;
2467
2468 if (!awb) {
2469 u16 red = (u16)sensor->ctrls.red_balance->val;
2470 u16 blue = (u16)sensor->ctrls.blue_balance->val;
2471
2472 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_R_GAIN, red);
2473 if (ret)
2474 return ret;
2475 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_B_GAIN, blue);
2476 }
2477
2478 return ret;
2479 }
2480
ov5640_set_ctrl_exposure(struct ov5640_dev * sensor,enum v4l2_exposure_auto_type auto_exposure)2481 static int ov5640_set_ctrl_exposure(struct ov5640_dev *sensor,
2482 enum v4l2_exposure_auto_type auto_exposure)
2483 {
2484 struct ov5640_ctrls *ctrls = &sensor->ctrls;
2485 bool auto_exp = (auto_exposure == V4L2_EXPOSURE_AUTO);
2486 int ret = 0;
2487
2488 if (ctrls->auto_exp->is_new) {
2489 ret = ov5640_set_autoexposure(sensor, auto_exp);
2490 if (ret)
2491 return ret;
2492 }
2493
2494 if (!auto_exp && ctrls->exposure->is_new) {
2495 u16 max_exp;
2496
2497 ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_VTS,
2498 &max_exp);
2499 if (ret)
2500 return ret;
2501 ret = ov5640_get_vts(sensor);
2502 if (ret < 0)
2503 return ret;
2504 max_exp += ret;
2505 ret = 0;
2506
2507 if (ctrls->exposure->val < max_exp)
2508 ret = ov5640_set_exposure(sensor, ctrls->exposure->val);
2509 }
2510
2511 return ret;
2512 }
2513
ov5640_set_ctrl_gain(struct ov5640_dev * sensor,bool auto_gain)2514 static int ov5640_set_ctrl_gain(struct ov5640_dev *sensor, bool auto_gain)
2515 {
2516 struct ov5640_ctrls *ctrls = &sensor->ctrls;
2517 int ret = 0;
2518
2519 if (ctrls->auto_gain->is_new) {
2520 ret = ov5640_set_autogain(sensor, auto_gain);
2521 if (ret)
2522 return ret;
2523 }
2524
2525 if (!auto_gain && ctrls->gain->is_new)
2526 ret = ov5640_set_gain(sensor, ctrls->gain->val);
2527
2528 return ret;
2529 }
2530
2531 static const char * const test_pattern_menu[] = {
2532 "Disabled",
2533 "Color bars",
2534 "Color bars w/ rolling bar",
2535 "Color squares",
2536 "Color squares w/ rolling bar",
2537 };
2538
2539 #define OV5640_TEST_ENABLE BIT(7)
2540 #define OV5640_TEST_ROLLING BIT(6) /* rolling horizontal bar */
2541 #define OV5640_TEST_TRANSPARENT BIT(5)
2542 #define OV5640_TEST_SQUARE_BW BIT(4) /* black & white squares */
2543 #define OV5640_TEST_BAR_STANDARD (0 << 2)
2544 #define OV5640_TEST_BAR_VERT_CHANGE_1 (1 << 2)
2545 #define OV5640_TEST_BAR_HOR_CHANGE (2 << 2)
2546 #define OV5640_TEST_BAR_VERT_CHANGE_2 (3 << 2)
2547 #define OV5640_TEST_BAR (0 << 0)
2548 #define OV5640_TEST_RANDOM (1 << 0)
2549 #define OV5640_TEST_SQUARE (2 << 0)
2550 #define OV5640_TEST_BLACK (3 << 0)
2551
2552 static const u8 test_pattern_val[] = {
2553 0,
2554 OV5640_TEST_ENABLE | OV5640_TEST_BAR_VERT_CHANGE_1 |
2555 OV5640_TEST_BAR,
2556 OV5640_TEST_ENABLE | OV5640_TEST_ROLLING |
2557 OV5640_TEST_BAR_VERT_CHANGE_1 | OV5640_TEST_BAR,
2558 OV5640_TEST_ENABLE | OV5640_TEST_SQUARE,
2559 OV5640_TEST_ENABLE | OV5640_TEST_ROLLING | OV5640_TEST_SQUARE,
2560 };
2561
ov5640_set_ctrl_test_pattern(struct ov5640_dev * sensor,int value)2562 static int ov5640_set_ctrl_test_pattern(struct ov5640_dev *sensor, int value)
2563 {
2564 return ov5640_write_reg(sensor, OV5640_REG_PRE_ISP_TEST_SET1,
2565 test_pattern_val[value]);
2566 }
2567
ov5640_set_ctrl_light_freq(struct ov5640_dev * sensor,int value)2568 static int ov5640_set_ctrl_light_freq(struct ov5640_dev *sensor, int value)
2569 {
2570 int ret;
2571
2572 ret = ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL01, BIT(7),
2573 (value == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) ?
2574 0 : BIT(7));
2575 if (ret)
2576 return ret;
2577
2578 return ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL00, BIT(2),
2579 (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) ?
2580 BIT(2) : 0);
2581 }
2582
ov5640_set_ctrl_hflip(struct ov5640_dev * sensor,int value)2583 static int ov5640_set_ctrl_hflip(struct ov5640_dev *sensor, int value)
2584 {
2585 /*
2586 * If sensor is mounted upside down, mirror logic is inversed.
2587 *
2588 * Sensor is a BSI (Back Side Illuminated) one,
2589 * so image captured is physically mirrored.
2590 * This is why mirror logic is inversed in
2591 * order to cancel this mirror effect.
2592 */
2593
2594 /*
2595 * TIMING TC REG21:
2596 * - [2]: ISP mirror
2597 * - [1]: Sensor mirror
2598 */
2599 return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2600 BIT(2) | BIT(1),
2601 (!(value ^ sensor->upside_down)) ?
2602 (BIT(2) | BIT(1)) : 0);
2603 }
2604
ov5640_set_ctrl_vflip(struct ov5640_dev * sensor,int value)2605 static int ov5640_set_ctrl_vflip(struct ov5640_dev *sensor, int value)
2606 {
2607 /* If sensor is mounted upside down, flip logic is inversed */
2608
2609 /*
2610 * TIMING TC REG20:
2611 * - [2]: ISP vflip
2612 * - [1]: Sensor vflip
2613 */
2614 return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
2615 BIT(2) | BIT(1),
2616 (value ^ sensor->upside_down) ?
2617 (BIT(2) | BIT(1)) : 0);
2618 }
2619
ov5640_g_volatile_ctrl(struct v4l2_ctrl * ctrl)2620 static int ov5640_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
2621 {
2622 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2623 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2624 int val;
2625
2626 /* v4l2_ctrl_lock() locks our own mutex */
2627
2628 switch (ctrl->id) {
2629 case V4L2_CID_AUTOGAIN:
2630 val = ov5640_get_gain(sensor);
2631 if (val < 0)
2632 return val;
2633 sensor->ctrls.gain->val = val;
2634 break;
2635 case V4L2_CID_EXPOSURE_AUTO:
2636 val = ov5640_get_exposure(sensor);
2637 if (val < 0)
2638 return val;
2639 sensor->ctrls.exposure->val = val;
2640 break;
2641 }
2642
2643 return 0;
2644 }
2645
ov5640_s_ctrl(struct v4l2_ctrl * ctrl)2646 static int ov5640_s_ctrl(struct v4l2_ctrl *ctrl)
2647 {
2648 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2649 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2650 int ret;
2651
2652 /* v4l2_ctrl_lock() locks our own mutex */
2653
2654 /*
2655 * If the device is not powered up by the host driver do
2656 * not apply any controls to H/W at this time. Instead
2657 * the controls will be restored right after power-up.
2658 */
2659 if (sensor->power_count == 0)
2660 return 0;
2661
2662 switch (ctrl->id) {
2663 case V4L2_CID_AUTOGAIN:
2664 ret = ov5640_set_ctrl_gain(sensor, ctrl->val);
2665 break;
2666 case V4L2_CID_EXPOSURE_AUTO:
2667 ret = ov5640_set_ctrl_exposure(sensor, ctrl->val);
2668 break;
2669 case V4L2_CID_AUTO_WHITE_BALANCE:
2670 ret = ov5640_set_ctrl_white_balance(sensor, ctrl->val);
2671 break;
2672 case V4L2_CID_HUE:
2673 ret = ov5640_set_ctrl_hue(sensor, ctrl->val);
2674 break;
2675 case V4L2_CID_CONTRAST:
2676 ret = ov5640_set_ctrl_contrast(sensor, ctrl->val);
2677 break;
2678 case V4L2_CID_SATURATION:
2679 ret = ov5640_set_ctrl_saturation(sensor, ctrl->val);
2680 break;
2681 case V4L2_CID_TEST_PATTERN:
2682 ret = ov5640_set_ctrl_test_pattern(sensor, ctrl->val);
2683 break;
2684 case V4L2_CID_POWER_LINE_FREQUENCY:
2685 ret = ov5640_set_ctrl_light_freq(sensor, ctrl->val);
2686 break;
2687 case V4L2_CID_HFLIP:
2688 ret = ov5640_set_ctrl_hflip(sensor, ctrl->val);
2689 break;
2690 case V4L2_CID_VFLIP:
2691 ret = ov5640_set_ctrl_vflip(sensor, ctrl->val);
2692 break;
2693 default:
2694 ret = -EINVAL;
2695 break;
2696 }
2697
2698 return ret;
2699 }
2700
2701 static const struct v4l2_ctrl_ops ov5640_ctrl_ops = {
2702 .g_volatile_ctrl = ov5640_g_volatile_ctrl,
2703 .s_ctrl = ov5640_s_ctrl,
2704 };
2705
ov5640_init_controls(struct ov5640_dev * sensor)2706 static int ov5640_init_controls(struct ov5640_dev *sensor)
2707 {
2708 const struct v4l2_ctrl_ops *ops = &ov5640_ctrl_ops;
2709 struct ov5640_ctrls *ctrls = &sensor->ctrls;
2710 struct v4l2_ctrl_handler *hdl = &ctrls->handler;
2711 int ret;
2712
2713 v4l2_ctrl_handler_init(hdl, 32);
2714
2715 /* we can use our own mutex for the ctrl lock */
2716 hdl->lock = &sensor->lock;
2717
2718 /* Clock related controls */
2719 ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE,
2720 0, INT_MAX, 1,
2721 ov5640_calc_pixel_rate(sensor));
2722
2723 /* Auto/manual white balance */
2724 ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
2725 V4L2_CID_AUTO_WHITE_BALANCE,
2726 0, 1, 1, 1);
2727 ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
2728 0, 4095, 1, 0);
2729 ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
2730 0, 4095, 1, 0);
2731 /* Auto/manual exposure */
2732 ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
2733 V4L2_CID_EXPOSURE_AUTO,
2734 V4L2_EXPOSURE_MANUAL, 0,
2735 V4L2_EXPOSURE_AUTO);
2736 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
2737 0, 65535, 1, 0);
2738 /* Auto/manual gain */
2739 ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
2740 0, 1, 1, 1);
2741 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
2742 0, 1023, 1, 0);
2743
2744 ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
2745 0, 255, 1, 64);
2746 ctrls->hue = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HUE,
2747 0, 359, 1, 0);
2748 ctrls->contrast = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST,
2749 0, 255, 1, 0);
2750 ctrls->test_pattern =
2751 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
2752 ARRAY_SIZE(test_pattern_menu) - 1,
2753 0, 0, test_pattern_menu);
2754 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP,
2755 0, 1, 1, 0);
2756 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP,
2757 0, 1, 1, 0);
2758
2759 ctrls->light_freq =
2760 v4l2_ctrl_new_std_menu(hdl, ops,
2761 V4L2_CID_POWER_LINE_FREQUENCY,
2762 V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
2763 V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
2764
2765 if (hdl->error) {
2766 ret = hdl->error;
2767 goto free_ctrls;
2768 }
2769
2770 ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
2771 ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
2772 ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
2773
2774 v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
2775 v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
2776 v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
2777
2778 sensor->sd.ctrl_handler = hdl;
2779 return 0;
2780
2781 free_ctrls:
2782 v4l2_ctrl_handler_free(hdl);
2783 return ret;
2784 }
2785
ov5640_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_size_enum * fse)2786 static int ov5640_enum_frame_size(struct v4l2_subdev *sd,
2787 struct v4l2_subdev_pad_config *cfg,
2788 struct v4l2_subdev_frame_size_enum *fse)
2789 {
2790 if (fse->pad != 0)
2791 return -EINVAL;
2792 if (fse->index >= OV5640_NUM_MODES)
2793 return -EINVAL;
2794
2795 fse->min_width =
2796 ov5640_mode_data[fse->index].hact;
2797 fse->max_width = fse->min_width;
2798 fse->min_height =
2799 ov5640_mode_data[fse->index].vact;
2800 fse->max_height = fse->min_height;
2801
2802 return 0;
2803 }
2804
ov5640_enum_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_interval_enum * fie)2805 static int ov5640_enum_frame_interval(
2806 struct v4l2_subdev *sd,
2807 struct v4l2_subdev_pad_config *cfg,
2808 struct v4l2_subdev_frame_interval_enum *fie)
2809 {
2810 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2811 struct v4l2_fract tpf;
2812 int ret;
2813
2814 if (fie->pad != 0)
2815 return -EINVAL;
2816 if (fie->index >= OV5640_NUM_FRAMERATES)
2817 return -EINVAL;
2818
2819 tpf.numerator = 1;
2820 tpf.denominator = ov5640_framerates[fie->index];
2821
2822 ret = ov5640_try_frame_interval(sensor, &tpf,
2823 fie->width, fie->height);
2824 if (ret < 0)
2825 return -EINVAL;
2826
2827 fie->interval = tpf;
2828 return 0;
2829 }
2830
ov5640_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)2831 static int ov5640_g_frame_interval(struct v4l2_subdev *sd,
2832 struct v4l2_subdev_frame_interval *fi)
2833 {
2834 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2835
2836 mutex_lock(&sensor->lock);
2837 fi->interval = sensor->frame_interval;
2838 mutex_unlock(&sensor->lock);
2839
2840 return 0;
2841 }
2842
ov5640_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)2843 static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
2844 struct v4l2_subdev_frame_interval *fi)
2845 {
2846 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2847 const struct ov5640_mode_info *mode;
2848 int frame_rate, ret = 0;
2849
2850 if (fi->pad != 0)
2851 return -EINVAL;
2852
2853 mutex_lock(&sensor->lock);
2854
2855 if (sensor->streaming) {
2856 ret = -EBUSY;
2857 goto out;
2858 }
2859
2860 mode = sensor->current_mode;
2861
2862 frame_rate = ov5640_try_frame_interval(sensor, &fi->interval,
2863 mode->hact, mode->vact);
2864 if (frame_rate < 0) {
2865 /* Always return a valid frame interval value */
2866 fi->interval = sensor->frame_interval;
2867 goto out;
2868 }
2869
2870 mode = ov5640_find_mode(sensor, frame_rate, mode->hact,
2871 mode->vact, true);
2872 if (!mode) {
2873 ret = -EINVAL;
2874 goto out;
2875 }
2876
2877 if (mode != sensor->current_mode ||
2878 frame_rate != sensor->current_fr) {
2879 sensor->current_fr = frame_rate;
2880 sensor->frame_interval = fi->interval;
2881 sensor->current_mode = mode;
2882 sensor->pending_mode_change = true;
2883
2884 __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
2885 ov5640_calc_pixel_rate(sensor));
2886 }
2887 out:
2888 mutex_unlock(&sensor->lock);
2889 return ret;
2890 }
2891
ov5640_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)2892 static int ov5640_enum_mbus_code(struct v4l2_subdev *sd,
2893 struct v4l2_subdev_pad_config *cfg,
2894 struct v4l2_subdev_mbus_code_enum *code)
2895 {
2896 if (code->pad != 0)
2897 return -EINVAL;
2898 if (code->index >= ARRAY_SIZE(ov5640_formats))
2899 return -EINVAL;
2900
2901 code->code = ov5640_formats[code->index].code;
2902 return 0;
2903 }
2904
ov5640_s_stream(struct v4l2_subdev * sd,int enable)2905 static int ov5640_s_stream(struct v4l2_subdev *sd, int enable)
2906 {
2907 struct ov5640_dev *sensor = to_ov5640_dev(sd);
2908 int ret = 0;
2909
2910 mutex_lock(&sensor->lock);
2911
2912 if (sensor->streaming == !enable) {
2913 if (enable && sensor->pending_mode_change) {
2914 ret = ov5640_set_mode(sensor);
2915 if (ret)
2916 goto out;
2917 }
2918
2919 if (enable && sensor->pending_fmt_change) {
2920 ret = ov5640_set_framefmt(sensor, &sensor->fmt);
2921 if (ret)
2922 goto out;
2923 sensor->pending_fmt_change = false;
2924 }
2925
2926 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
2927 ret = ov5640_set_stream_mipi(sensor, enable);
2928 else if (sensor->ep.bus_type == V4L2_MBUS_BT656)
2929 ret = ov5640_set_stream_bt656(sensor, enable);
2930 else
2931 ret = ov5640_set_stream_dvp(sensor, enable);
2932
2933 if (!ret)
2934 sensor->streaming = enable;
2935 }
2936 out:
2937 mutex_unlock(&sensor->lock);
2938 return ret;
2939 }
2940
2941 static const struct v4l2_subdev_core_ops ov5640_core_ops = {
2942 .s_power = ov5640_s_power,
2943 .log_status = v4l2_ctrl_subdev_log_status,
2944 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
2945 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
2946 };
2947
2948 static const struct v4l2_subdev_video_ops ov5640_video_ops = {
2949 .g_frame_interval = ov5640_g_frame_interval,
2950 .s_frame_interval = ov5640_s_frame_interval,
2951 .s_stream = ov5640_s_stream,
2952 };
2953
2954 static const struct v4l2_subdev_pad_ops ov5640_pad_ops = {
2955 .enum_mbus_code = ov5640_enum_mbus_code,
2956 .get_fmt = ov5640_get_fmt,
2957 .set_fmt = ov5640_set_fmt,
2958 .enum_frame_size = ov5640_enum_frame_size,
2959 .enum_frame_interval = ov5640_enum_frame_interval,
2960 };
2961
2962 static const struct v4l2_subdev_ops ov5640_subdev_ops = {
2963 .core = &ov5640_core_ops,
2964 .video = &ov5640_video_ops,
2965 .pad = &ov5640_pad_ops,
2966 };
2967
ov5640_get_regulators(struct ov5640_dev * sensor)2968 static int ov5640_get_regulators(struct ov5640_dev *sensor)
2969 {
2970 int i;
2971
2972 for (i = 0; i < OV5640_NUM_SUPPLIES; i++)
2973 sensor->supplies[i].supply = ov5640_supply_name[i];
2974
2975 return devm_regulator_bulk_get(&sensor->i2c_client->dev,
2976 OV5640_NUM_SUPPLIES,
2977 sensor->supplies);
2978 }
2979
ov5640_check_chip_id(struct ov5640_dev * sensor)2980 static int ov5640_check_chip_id(struct ov5640_dev *sensor)
2981 {
2982 struct i2c_client *client = sensor->i2c_client;
2983 int ret = 0;
2984 u16 chip_id;
2985
2986 ret = ov5640_set_power_on(sensor);
2987 if (ret)
2988 return ret;
2989
2990 ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
2991 if (ret) {
2992 dev_err(&client->dev, "%s: failed to read chip identifier\n",
2993 __func__);
2994 goto power_off;
2995 }
2996
2997 if (chip_id != 0x5640) {
2998 dev_err(&client->dev, "%s: wrong chip identifier, expected 0x5640, got 0x%x\n",
2999 __func__, chip_id);
3000 ret = -ENXIO;
3001 }
3002
3003 power_off:
3004 ov5640_set_power_off(sensor);
3005 return ret;
3006 }
3007
ov5640_probe(struct i2c_client * client)3008 static int ov5640_probe(struct i2c_client *client)
3009 {
3010 struct device *dev = &client->dev;
3011 struct fwnode_handle *endpoint;
3012 struct ov5640_dev *sensor;
3013 struct v4l2_mbus_framefmt *fmt;
3014 u32 rotation;
3015 int ret;
3016
3017 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
3018 if (!sensor)
3019 return -ENOMEM;
3020
3021 sensor->i2c_client = client;
3022
3023 /*
3024 * default init sequence initialize sensor to
3025 * YUV422 UYVY VGA@30fps
3026 */
3027 fmt = &sensor->fmt;
3028 fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
3029 fmt->colorspace = V4L2_COLORSPACE_SRGB;
3030 fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
3031 fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
3032 fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
3033 fmt->width = 640;
3034 fmt->height = 480;
3035 fmt->field = V4L2_FIELD_NONE;
3036 sensor->frame_interval.numerator = 1;
3037 sensor->frame_interval.denominator = ov5640_framerates[OV5640_30_FPS];
3038 sensor->current_fr = OV5640_30_FPS;
3039 sensor->current_mode =
3040 &ov5640_mode_data[OV5640_MODE_VGA_640_480];
3041 sensor->last_mode = sensor->current_mode;
3042
3043 sensor->ae_target = 52;
3044
3045 /* optional indication of physical rotation of sensor */
3046 ret = fwnode_property_read_u32(dev_fwnode(&client->dev), "rotation",
3047 &rotation);
3048 if (!ret) {
3049 switch (rotation) {
3050 case 180:
3051 sensor->upside_down = true;
3052 fallthrough;
3053 case 0:
3054 break;
3055 default:
3056 dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n",
3057 rotation);
3058 }
3059 }
3060
3061 endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev),
3062 NULL);
3063 if (!endpoint) {
3064 dev_err(dev, "endpoint node not found\n");
3065 return -EINVAL;
3066 }
3067
3068 ret = v4l2_fwnode_endpoint_parse(endpoint, &sensor->ep);
3069 fwnode_handle_put(endpoint);
3070 if (ret) {
3071 dev_err(dev, "Could not parse endpoint\n");
3072 return ret;
3073 }
3074
3075 if (sensor->ep.bus_type != V4L2_MBUS_PARALLEL &&
3076 sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY &&
3077 sensor->ep.bus_type != V4L2_MBUS_BT656) {
3078 dev_err(dev, "Unsupported bus type %d\n", sensor->ep.bus_type);
3079 return -EINVAL;
3080 }
3081
3082 /* get system clock (xclk) */
3083 sensor->xclk = devm_clk_get(dev, "xclk");
3084 if (IS_ERR(sensor->xclk)) {
3085 dev_err(dev, "failed to get xclk\n");
3086 return PTR_ERR(sensor->xclk);
3087 }
3088
3089 sensor->xclk_freq = clk_get_rate(sensor->xclk);
3090 if (sensor->xclk_freq < OV5640_XCLK_MIN ||
3091 sensor->xclk_freq > OV5640_XCLK_MAX) {
3092 dev_err(dev, "xclk frequency out of range: %d Hz\n",
3093 sensor->xclk_freq);
3094 return -EINVAL;
3095 }
3096
3097 /* request optional power down pin */
3098 sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown",
3099 GPIOD_OUT_HIGH);
3100 if (IS_ERR(sensor->pwdn_gpio))
3101 return PTR_ERR(sensor->pwdn_gpio);
3102
3103 /* request optional reset pin */
3104 sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset",
3105 GPIOD_OUT_HIGH);
3106 if (IS_ERR(sensor->reset_gpio))
3107 return PTR_ERR(sensor->reset_gpio);
3108
3109 v4l2_i2c_subdev_init(&sensor->sd, client, &ov5640_subdev_ops);
3110
3111 sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
3112 V4L2_SUBDEV_FL_HAS_EVENTS;
3113 sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
3114 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
3115 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
3116 if (ret)
3117 return ret;
3118
3119 ret = ov5640_get_regulators(sensor);
3120 if (ret)
3121 return ret;
3122
3123 mutex_init(&sensor->lock);
3124
3125 ret = ov5640_check_chip_id(sensor);
3126 if (ret)
3127 goto entity_cleanup;
3128
3129 ret = ov5640_init_controls(sensor);
3130 if (ret)
3131 goto entity_cleanup;
3132
3133 ret = v4l2_async_register_subdev_sensor_common(&sensor->sd);
3134 if (ret)
3135 goto free_ctrls;
3136
3137 return 0;
3138
3139 free_ctrls:
3140 v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3141 entity_cleanup:
3142 media_entity_cleanup(&sensor->sd.entity);
3143 mutex_destroy(&sensor->lock);
3144 return ret;
3145 }
3146
ov5640_remove(struct i2c_client * client)3147 static int ov5640_remove(struct i2c_client *client)
3148 {
3149 struct v4l2_subdev *sd = i2c_get_clientdata(client);
3150 struct ov5640_dev *sensor = to_ov5640_dev(sd);
3151
3152 v4l2_async_unregister_subdev(&sensor->sd);
3153 media_entity_cleanup(&sensor->sd.entity);
3154 v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3155 mutex_destroy(&sensor->lock);
3156
3157 return 0;
3158 }
3159
3160 static const struct i2c_device_id ov5640_id[] = {
3161 {"ov5640", 0},
3162 {},
3163 };
3164 MODULE_DEVICE_TABLE(i2c, ov5640_id);
3165
3166 static const struct of_device_id ov5640_dt_ids[] = {
3167 { .compatible = "ovti,ov5640" },
3168 { /* sentinel */ }
3169 };
3170 MODULE_DEVICE_TABLE(of, ov5640_dt_ids);
3171
3172 static struct i2c_driver ov5640_i2c_driver = {
3173 .driver = {
3174 .name = "ov5640",
3175 .of_match_table = ov5640_dt_ids,
3176 },
3177 .id_table = ov5640_id,
3178 .probe_new = ov5640_probe,
3179 .remove = ov5640_remove,
3180 };
3181
3182 module_i2c_driver(ov5640_i2c_driver);
3183
3184 MODULE_DESCRIPTION("OV5640 MIPI Camera Subdev Driver");
3185 MODULE_LICENSE("GPL");
3186