4 * Copyright (C) 2008 Renesas Solutions Corp.
5 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
7 * Based on ov772x driver,
9 * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
10 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
11 * Copyright (C) 2008 Magnus Damm
12 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
19 #include <linux/init.h>
20 #include <linux/module.h>
21 #include <linux/i2c.h>
22 #include <linux/slab.h>
23 #include <linux/kernel.h>
24 #include <linux/delay.h>
25 #include <linux/videodev2.h>
26 #include <media/v4l2-chip-ident.h>
27 #include <media/v4l2-subdev.h>
28 #include <media/soc_camera.h>
29 #include <media/tw9910.h>
31 #define GET_ID(val) ((val & 0xF8) >> 3)
32 #define GET_ReV(val) (val & 0x07)
37 #define ID 0x00 /* Product ID Code Register */
38 #define STATUS1 0x01 /* Chip Status Register I */
39 #define INFORM 0x02 /* Input Format */
40 #define OPFORM 0x03 /* Output Format Control Register */
41 #define DLYCTR 0x04 /* Hysteresis and HSYNC Delay Control */
42 #define OUTCTR1 0x05 /* Output Control I */
43 #define ACNTL1 0x06 /* Analog Control Register 1 */
44 #define CROP_HI 0x07 /* Cropping Register, High */
45 #define VDELAY_LO 0x08 /* Vertical Delay Register, Low */
46 #define VACTIVE_LO 0x09 /* Vertical Active Register, Low */
47 #define HDELAY_LO 0x0A /* Horizontal Delay Register, Low */
48 #define HACTIVE_LO 0x0B /* Horizontal Active Register, Low */
49 #define CNTRL1 0x0C /* Control Register I */
50 #define VSCALE_LO 0x0D /* Vertical Scaling Register, Low */
51 #define SCALE_HI 0x0E /* Scaling Register, High */
52 #define HSCALE_LO 0x0F /* Horizontal Scaling Register, Low */
53 #define BRIGHT 0x10 /* BRIGHTNESS Control Register */
54 #define CONTRAST 0x11 /* CONTRAST Control Register */
55 #define SHARPNESS 0x12 /* SHARPNESS Control Register I */
56 #define SAT_U 0x13 /* Chroma (U) Gain Register */
57 #define SAT_V 0x14 /* Chroma (V) Gain Register */
58 #define HUE 0x15 /* Hue Control Register */
60 #define CORING2 0x18 /* Coring and IF compensation */
61 #define VBICNTL 0x19 /* VBI Control Register */
62 #define ACNTL2 0x1A /* Analog Control 2 */
63 #define OUTCTR2 0x1B /* Output Control 2 */
64 #define SDT 0x1C /* Standard Selection */
65 #define SDTR 0x1D /* Standard Recognition */
66 #define TEST 0x1F /* Test Control Register */
67 #define CLMPG 0x20 /* Clamping Gain */
68 #define IAGC 0x21 /* Individual AGC Gain */
69 #define AGCGAIN 0x22 /* AGC Gain */
70 #define PEAKWT 0x23 /* White Peak Threshold */
71 #define CLMPL 0x24 /* Clamp level */
72 #define SYNCT 0x25 /* Sync Amplitude */
73 #define MISSCNT 0x26 /* Sync Miss Count Register */
74 #define PCLAMP 0x27 /* Clamp Position Register */
75 #define VCNTL1 0x28 /* Vertical Control I */
76 #define VCNTL2 0x29 /* Vertical Control II */
77 #define CKILL 0x2A /* Color Killer Level Control */
78 #define COMB 0x2B /* Comb Filter Control */
79 #define LDLY 0x2C /* Luma Delay and H Filter Control */
80 #define MISC1 0x2D /* Miscellaneous Control I */
81 #define LOOP 0x2E /* LOOP Control Register */
82 #define MISC2 0x2F /* Miscellaneous Control II */
83 #define MVSN 0x30 /* Macrovision Detection */
84 #define STATUS2 0x31 /* Chip STATUS II */
85 #define HFREF 0x32 /* H monitor */
86 #define CLMD 0x33 /* CLAMP MODE */
87 #define IDCNTL 0x34 /* ID Detection Control */
88 #define CLCNTL1 0x35 /* Clamp Control I */
89 #define ANAPLLCTL 0x4C
124 #define VBIDELAY 0x6F
131 #define FC27_ON 0x40 /* 1 : Input crystal clock frequency is 27MHz */
132 #define FC27_FF 0x00 /* 0 : Square pixel mode. */
133 /* Must use 24.54MHz for 60Hz field rate */
134 /* source or 29.5MHz for 50Hz field rate */
135 #define IFSEL_S 0x10 /* 01 : S-video decoding */
136 #define IFSEL_C 0x00 /* 00 : Composite video decoding */
137 /* Y input video selection */
138 #define YSEL_M0 0x00 /* 00 : Mux0 selected */
139 #define YSEL_M1 0x04 /* 01 : Mux1 selected */
140 #define YSEL_M2 0x08 /* 10 : Mux2 selected */
141 #define YSEL_M3 0x10 /* 11 : Mux3 selected */
144 #define MODE 0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
145 /* 1 : ITU-R-656 compatible data sequence format */
146 #define LEN 0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
147 /* 1 : 16-bit YCrCb 4:2:2 output format.*/
148 #define LLCMODE 0x20 /* 1 : LLC output mode. */
149 /* 0 : free-run output mode */
150 #define AINC 0x10 /* Serial interface auto-indexing control */
151 /* 0 : auto-increment */
153 #define VSCTL 0x08 /* 1 : Vertical out ctrl by DVALID */
154 /* 0 : Vertical out ctrl by HACTIVE and DVALID */
155 #define OEN 0x04 /* Output Enable together with TRI_SEL. */
158 #define VSP_LO 0x00 /* 0 : VS pin output polarity is active low */
159 #define VSP_HI 0x80 /* 1 : VS pin output polarity is active high. */
160 /* VS pin output control */
161 #define VSSL_VSYNC 0x00 /* 0 : VSYNC */
162 #define VSSL_VACT 0x10 /* 1 : VACT */
163 #define VSSL_FIELD 0x20 /* 2 : FIELD */
164 #define VSSL_VVALID 0x30 /* 3 : VVALID */
165 #define VSSL_ZERO 0x70 /* 7 : 0 */
166 #define HSP_LOW 0x00 /* 0 : HS pin output polarity is active low */
167 #define HSP_HI 0x08 /* 1 : HS pin output polarity is active high.*/
168 /* HS pin output control */
169 #define HSSL_HACT 0x00 /* 0 : HACT */
170 #define HSSL_HSYNC 0x01 /* 1 : HSYNC */
171 #define HSSL_DVALID 0x02 /* 2 : DVALID */
172 #define HSSL_HLOCK 0x03 /* 3 : HLOCK */
173 #define HSSL_ASYNCW 0x04 /* 4 : ASYNCW */
174 #define HSSL_ZERO 0x07 /* 7 : 0 */
177 #define SRESET 0x80 /* resets the device to its default state
178 * but all register content remain unchanged.
179 * This bit is self-resetting.
183 /* RTSEL : control the real time signal
184 * output from the MPOUT pin
186 #define RTSEL_MASK 0x07
187 #define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
188 #define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
189 #define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
190 #define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
191 #define RTSEL_MONO 0x04 /* 0100 = MONO */
192 #define RTSEL_DET50 0x05 /* 0101 = DET50 */
193 #define RTSEL_FIELD 0x06 /* 0110 = FIELD */
194 #define RTSEL_RTCO 0x07 /* 0111 = RTCO ( Real Time Control ) */
201 unsigned char reg_num;
205 struct tw9910_scale_ctrl {
207 unsigned short width;
208 unsigned short height;
213 struct tw9910_cropping_ctrl {
220 struct tw9910_hsync_ctrl {
226 struct v4l2_subdev subdev;
227 struct tw9910_video_info *info;
228 const struct tw9910_scale_ctrl *scale;
235 #define ENDMARKER { 0xff, 0xff }
237 static const struct regval_list tw9910_default_regs[] =
240 { OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },
244 static const struct soc_camera_data_format tw9910_color_fmt[] = {
247 .fourcc = V4L2_PIX_FMT_VYUY,
249 .colorspace = V4L2_COLORSPACE_SMPTE170M,
253 static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
262 .name = "NTSC CCIR601",
269 .name = "NTSC SQ (CIF)",
276 .name = "NTSC CCIR601 (CIF)",
283 .name = "NTSC SQ (QCIF)",
290 .name = "NTSC CCIR601 (QCIF)",
298 static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
307 .name = "PAL CCIR601",
314 .name = "PAL SQ (CIF)",
321 .name = "PAL CCIR601 (CIF)",
328 .name = "PAL SQ (QCIF)",
335 .name = "PAL CCIR601 (QCIF)",
343 static const struct tw9910_cropping_ctrl tw9910_cropping_ctrl = {
350 static const struct tw9910_hsync_ctrl tw9910_hsync_ctrl = {
358 static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
360 return container_of(i2c_get_clientdata(client), struct tw9910_priv, subdev);
363 static int tw9910_set_scale(struct i2c_client *client,
364 const struct tw9910_scale_ctrl *scale)
368 ret = i2c_smbus_write_byte_data(client, SCALE_HI,
369 (scale->vscale & 0x0F00) >> 4 |
370 (scale->hscale & 0x0F00) >> 8);
374 ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
375 scale->hscale & 0x00FF);
379 ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
380 scale->vscale & 0x00FF);
385 static int tw9910_set_cropping(struct i2c_client *client,
386 const struct tw9910_cropping_ctrl *cropping)
390 ret = i2c_smbus_write_byte_data(client, CROP_HI,
391 (cropping->vdelay & 0x0300) >> 2 |
392 (cropping->vactive & 0x0300) >> 4 |
393 (cropping->hdelay & 0x0300) >> 6 |
394 (cropping->hactive & 0x0300) >> 8);
398 ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
399 cropping->vdelay & 0x00FF);
403 ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
404 cropping->vactive & 0x00FF);
408 ret = i2c_smbus_write_byte_data(client, HDELAY_LO,
409 cropping->hdelay & 0x00FF);
413 ret = i2c_smbus_write_byte_data(client, HACTIVE_LO,
414 cropping->hactive & 0x00FF);
419 static int tw9910_set_hsync(struct i2c_client *client,
420 const struct tw9910_hsync_ctrl *hsync)
425 ret = i2c_smbus_write_byte_data(client, HSGEGIN,
426 (hsync->start & 0x07F8) >> 3);
431 ret = i2c_smbus_write_byte_data(client, HSEND,
432 (hsync->end & 0x07F8) >> 3);
437 ret = i2c_smbus_read_byte_data(client, HSLOWCTL);
441 ret = i2c_smbus_write_byte_data(client, HSLOWCTL,
443 (hsync->start & 0x0007) << 4 |
444 (hsync->end & 0x0007));
449 static int tw9910_write_array(struct i2c_client *client,
450 const struct regval_list *vals)
452 while (vals->reg_num != 0xff) {
453 int ret = i2c_smbus_write_byte_data(client,
463 static int tw9910_mask_set(struct i2c_client *client, u8 command,
466 s32 val = i2c_smbus_read_byte_data(client, command);
473 return i2c_smbus_write_byte_data(client, command, val);
476 static void tw9910_reset(struct i2c_client *client)
478 i2c_smbus_write_byte_data(client, ACNTL1, SRESET);
482 static const struct tw9910_scale_ctrl*
483 tw9910_select_norm(struct soc_camera_device *icd, u32 width, u32 height)
485 const struct tw9910_scale_ctrl *scale;
486 const struct tw9910_scale_ctrl *ret = NULL;
487 v4l2_std_id norm = icd->vdev->current_norm;
488 __u32 diff = 0xffffffff, tmp;
491 if (norm & V4L2_STD_NTSC) {
492 scale = tw9910_ntsc_scales;
493 size = ARRAY_SIZE(tw9910_ntsc_scales);
494 } else if (norm & V4L2_STD_PAL) {
495 scale = tw9910_pal_scales;
496 size = ARRAY_SIZE(tw9910_pal_scales);
501 for (i = 0; i < size; i++) {
502 tmp = abs(width - scale[i].width) +
503 abs(height - scale[i].height);
514 * soc_camera_ops function
516 static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
518 struct i2c_client *client = sd->priv;
519 struct tw9910_priv *priv = to_tw9910(client);
525 dev_err(&client->dev, "norm select error\n");
529 dev_dbg(&client->dev, "%s %dx%d\n",
532 priv->scale->height);
537 static int tw9910_set_bus_param(struct soc_camera_device *icd,
543 static unsigned long tw9910_query_bus_param(struct soc_camera_device *icd)
545 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
546 struct tw9910_priv *priv = to_tw9910(client);
547 struct soc_camera_link *icl = to_soc_camera_link(icd);
548 unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
549 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
550 SOCAM_DATA_ACTIVE_HIGH | priv->info->buswidth;
552 return soc_camera_apply_sensor_flags(icl, flags);
555 static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
559 if (norm & (V4L2_STD_NTSC | V4L2_STD_PAL))
565 static int tw9910_enum_input(struct soc_camera_device *icd,
566 struct v4l2_input *inp)
568 inp->type = V4L2_INPUT_TYPE_TUNER;
569 inp->std = V4L2_STD_UNKNOWN;
570 strcpy(inp->name, "Video");
575 static int tw9910_g_chip_ident(struct v4l2_subdev *sd,
576 struct v4l2_dbg_chip_ident *id)
578 id->ident = V4L2_IDENT_TW9910;
584 #ifdef CONFIG_VIDEO_ADV_DEBUG
585 static int tw9910_g_register(struct v4l2_subdev *sd,
586 struct v4l2_dbg_register *reg)
588 struct i2c_client *client = sd->priv;
594 ret = i2c_smbus_read_byte_data(client, reg->reg);
601 reg->val = (__u64)ret;
606 static int tw9910_s_register(struct v4l2_subdev *sd,
607 struct v4l2_dbg_register *reg)
609 struct i2c_client *client = sd->priv;
611 if (reg->reg > 0xff ||
615 return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
619 static int tw9910_set_crop(struct soc_camera_device *icd,
620 struct v4l2_rect *rect)
622 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
623 struct tw9910_priv *priv = to_tw9910(client);
628 * select suitable norm
630 priv->scale = tw9910_select_norm(icd, rect->width, rect->height);
632 goto tw9910_set_fmt_error;
637 tw9910_reset(client);
638 ret = tw9910_write_array(client, tw9910_default_regs);
640 goto tw9910_set_fmt_error;
646 if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
649 ret = tw9910_mask_set(client, OPFORM, LEN, val);
651 goto tw9910_set_fmt_error;
654 * select MPOUT behavior
656 switch (priv->info->mpout) {
657 case TW9910_MPO_VLOSS:
658 val = RTSEL_VLOSS; break;
659 case TW9910_MPO_HLOCK:
660 val = RTSEL_HLOCK; break;
661 case TW9910_MPO_SLOCK:
662 val = RTSEL_SLOCK; break;
663 case TW9910_MPO_VLOCK:
664 val = RTSEL_VLOCK; break;
665 case TW9910_MPO_MONO:
666 val = RTSEL_MONO; break;
667 case TW9910_MPO_DET50:
668 val = RTSEL_DET50; break;
669 case TW9910_MPO_FIELD:
670 val = RTSEL_FIELD; break;
671 case TW9910_MPO_RTCO:
672 val = RTSEL_RTCO; break;
677 ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
679 goto tw9910_set_fmt_error;
684 ret = tw9910_set_scale(client, priv->scale);
686 goto tw9910_set_fmt_error;
691 ret = tw9910_set_cropping(client, &tw9910_cropping_ctrl);
693 goto tw9910_set_fmt_error;
698 ret = tw9910_set_hsync(client, &tw9910_hsync_ctrl);
700 goto tw9910_set_fmt_error;
702 rect->width = priv->scale->width;
703 rect->height = priv->scale->height;
709 tw9910_set_fmt_error:
711 tw9910_reset(client);
717 static int tw9910_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
719 struct i2c_client *client = sd->priv;
720 struct soc_camera_device *icd = client->dev.platform_data;
721 struct v4l2_pix_format *pix = &f->fmt.pix;
722 /* See tw9910_set_crop() - no proper cropping support */
723 struct v4l2_rect rect = {
727 .height = pix->height,
734 for (i = 0; i < ARRAY_SIZE(tw9910_color_fmt); i++)
735 if (pix->pixelformat == tw9910_color_fmt[i].fourcc)
738 if (i == ARRAY_SIZE(tw9910_color_fmt))
741 ret = tw9910_set_crop(icd, &rect);
743 pix->width = rect.width;
744 pix->height = rect.height;
749 static int tw9910_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
751 struct i2c_client *client = sd->priv;
752 struct soc_camera_device *icd = client->dev.platform_data;
753 struct v4l2_pix_format *pix = &f->fmt.pix;
754 const struct tw9910_scale_ctrl *scale;
756 if (V4L2_FIELD_ANY == pix->field) {
757 pix->field = V4L2_FIELD_INTERLACED;
758 } else if (V4L2_FIELD_INTERLACED != pix->field) {
759 dev_err(&client->dev, "Field type invalid.\n");
764 * select suitable norm
766 scale = tw9910_select_norm(icd, pix->width, pix->height);
770 pix->width = scale->width;
771 pix->height = scale->height;
776 static int tw9910_video_probe(struct soc_camera_device *icd,
777 struct i2c_client *client)
779 struct tw9910_priv *priv = to_tw9910(client);
783 * We must have a parent by now. And it cannot be a wrong one.
784 * So this entire test is completely redundant.
786 if (!icd->dev.parent ||
787 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
791 * tw9910 only use 8 or 16 bit bus width
793 if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
794 SOCAM_DATAWIDTH_8 != priv->info->buswidth) {
795 dev_err(&icd->dev, "bus width error\n");
799 icd->formats = tw9910_color_fmt;
800 icd->num_formats = ARRAY_SIZE(tw9910_color_fmt);
803 * check and show Product ID
805 val = i2c_smbus_read_byte_data(client, ID);
807 if (0x0B != GET_ID(val) ||
808 0x00 != GET_ReV(val)) {
810 "Product ID error %x:%x\n", GET_ID(val), GET_ReV(val));
815 "tw9910 Product ID %0x:%0x\n", GET_ID(val), GET_ReV(val));
817 icd->vdev->tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL;
818 icd->vdev->current_norm = V4L2_STD_NTSC;
823 static struct soc_camera_ops tw9910_ops = {
824 .set_crop = tw9910_set_crop,
825 .set_bus_param = tw9910_set_bus_param,
826 .query_bus_param = tw9910_query_bus_param,
827 .enum_input = tw9910_enum_input,
830 static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
831 .g_chip_ident = tw9910_g_chip_ident,
832 .s_std = tw9910_s_std,
833 #ifdef CONFIG_VIDEO_ADV_DEBUG
834 .g_register = tw9910_g_register,
835 .s_register = tw9910_s_register,
839 static struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
840 .s_stream = tw9910_s_stream,
841 .s_fmt = tw9910_s_fmt,
842 .try_fmt = tw9910_try_fmt,
845 static struct v4l2_subdev_ops tw9910_subdev_ops = {
846 .core = &tw9910_subdev_core_ops,
847 .video = &tw9910_subdev_video_ops,
851 * i2c_driver function
854 /* This is called during probe, so, setting rect_max is Ok here: scale == 1 */
855 static void limit_to_scale(struct soc_camera_device *icd,
856 const struct tw9910_scale_ctrl *scale)
858 if (scale->width > icd->rect_max.width)
859 icd->rect_max.width = scale->width;
860 if (scale->width < icd->width_min)
861 icd->width_min = scale->width;
862 if (scale->height > icd->rect_max.height)
863 icd->rect_max.height = scale->height;
864 if (scale->height < icd->height_min)
865 icd->height_min = scale->height;
868 static int tw9910_probe(struct i2c_client *client,
869 const struct i2c_device_id *did)
872 struct tw9910_priv *priv;
873 struct tw9910_video_info *info;
874 struct soc_camera_device *icd = client->dev.platform_data;
875 struct i2c_adapter *adapter =
876 to_i2c_adapter(client->dev.parent);
877 struct soc_camera_link *icl;
878 const struct tw9910_scale_ctrl *scale;
882 dev_err(&client->dev, "TW9910: missing soc-camera data!\n");
886 icl = to_soc_camera_link(icd);
890 info = container_of(icl, struct tw9910_video_info, link);
892 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
893 dev_err(&client->dev,
894 "I2C-Adapter doesn't support "
895 "I2C_FUNC_SMBUS_BYTE_DATA\n");
899 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
905 v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
907 icd->ops = &tw9910_ops;
908 icd->iface = info->link.bus_id;
911 * set width and height
913 icd->rect_max.width = tw9910_ntsc_scales[0].width; /* set default */
914 icd->width_min = tw9910_ntsc_scales[0].width;
915 icd->rect_max.height = tw9910_ntsc_scales[0].height;
916 icd->height_min = tw9910_ntsc_scales[0].height;
918 scale = tw9910_ntsc_scales;
919 for (i = 0; i < ARRAY_SIZE(tw9910_ntsc_scales); i++)
920 limit_to_scale(icd, scale + i);
922 scale = tw9910_pal_scales;
923 for (i = 0; i < ARRAY_SIZE(tw9910_pal_scales); i++)
924 limit_to_scale(icd, scale + i);
926 ret = tw9910_video_probe(icd, client);
929 i2c_set_clientdata(client, NULL);
936 static int tw9910_remove(struct i2c_client *client)
938 struct tw9910_priv *priv = to_tw9910(client);
939 struct soc_camera_device *icd = client->dev.platform_data;
942 i2c_set_clientdata(client, NULL);
947 static const struct i2c_device_id tw9910_id[] = {
951 MODULE_DEVICE_TABLE(i2c, tw9910_id);
953 static struct i2c_driver tw9910_i2c_driver = {
957 .probe = tw9910_probe,
958 .remove = tw9910_remove,
959 .id_table = tw9910_id,
965 static int __init tw9910_module_init(void)
967 return i2c_add_driver(&tw9910_i2c_driver);
970 static void __exit tw9910_module_exit(void)
972 i2c_del_driver(&tw9910_i2c_driver);
975 module_init(tw9910_module_init);
976 module_exit(tw9910_module_exit);
978 MODULE_DESCRIPTION("SoC Camera driver for tw9910");
979 MODULE_AUTHOR("Kuninori Morimoto");
980 MODULE_LICENSE("GPL v2");