| 1 | /* |
| 2 | * Generic Platform Camera Driver |
| 3 | * |
| 4 | * Copyright (C) 2008 Magnus Damm |
| 5 | * Based on mt9m001 driver, |
| 6 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/videodev2.h> |
| 19 | #include <media/v4l2-subdev.h> |
| 20 | #include <media/soc_camera.h> |
| 21 | #include <media/soc_camera_platform.h> |
| 22 | |
| 23 | struct soc_camera_platform_priv { |
| 24 | struct v4l2_subdev subdev; |
| 25 | }; |
| 26 | |
| 27 | static struct soc_camera_platform_priv *get_priv(struct platform_device *pdev) |
| 28 | { |
| 29 | struct v4l2_subdev *subdev = platform_get_drvdata(pdev); |
| 30 | return container_of(subdev, struct soc_camera_platform_priv, subdev); |
| 31 | } |
| 32 | |
| 33 | static int soc_camera_platform_s_stream(struct v4l2_subdev *sd, int enable) |
| 34 | { |
| 35 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
| 36 | return p->set_capture(p, enable); |
| 37 | } |
| 38 | |
| 39 | static int soc_camera_platform_fill_fmt(struct v4l2_subdev *sd, |
| 40 | struct v4l2_mbus_framefmt *mf) |
| 41 | { |
| 42 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
| 43 | |
| 44 | mf->width = p->format.width; |
| 45 | mf->height = p->format.height; |
| 46 | mf->code = p->format.code; |
| 47 | mf->colorspace = p->format.colorspace; |
| 48 | mf->field = p->format.field; |
| 49 | |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | static int soc_camera_platform_s_power(struct v4l2_subdev *sd, int on) |
| 54 | { |
| 55 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
| 56 | |
| 57 | return soc_camera_set_power(p->icd->control, &p->icd->sdesc->subdev_desc, NULL, on); |
| 58 | } |
| 59 | |
| 60 | static struct v4l2_subdev_core_ops platform_subdev_core_ops = { |
| 61 | .s_power = soc_camera_platform_s_power, |
| 62 | }; |
| 63 | |
| 64 | static int soc_camera_platform_enum_mbus_code(struct v4l2_subdev *sd, |
| 65 | struct v4l2_subdev_pad_config *cfg, |
| 66 | struct v4l2_subdev_mbus_code_enum *code) |
| 67 | { |
| 68 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
| 69 | |
| 70 | if (code->pad || code->index) |
| 71 | return -EINVAL; |
| 72 | |
| 73 | code->code = p->format.code; |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static int soc_camera_platform_g_crop(struct v4l2_subdev *sd, |
| 78 | struct v4l2_crop *a) |
| 79 | { |
| 80 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
| 81 | |
| 82 | a->c.left = 0; |
| 83 | a->c.top = 0; |
| 84 | a->c.width = p->format.width; |
| 85 | a->c.height = p->format.height; |
| 86 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 87 | |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | static int soc_camera_platform_cropcap(struct v4l2_subdev *sd, |
| 92 | struct v4l2_cropcap *a) |
| 93 | { |
| 94 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
| 95 | |
| 96 | a->bounds.left = 0; |
| 97 | a->bounds.top = 0; |
| 98 | a->bounds.width = p->format.width; |
| 99 | a->bounds.height = p->format.height; |
| 100 | a->defrect = a->bounds; |
| 101 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 102 | a->pixelaspect.numerator = 1; |
| 103 | a->pixelaspect.denominator = 1; |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | static int soc_camera_platform_g_mbus_config(struct v4l2_subdev *sd, |
| 109 | struct v4l2_mbus_config *cfg) |
| 110 | { |
| 111 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(sd); |
| 112 | |
| 113 | cfg->flags = p->mbus_param; |
| 114 | cfg->type = p->mbus_type; |
| 115 | |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | static struct v4l2_subdev_video_ops platform_subdev_video_ops = { |
| 120 | .s_stream = soc_camera_platform_s_stream, |
| 121 | .cropcap = soc_camera_platform_cropcap, |
| 122 | .g_crop = soc_camera_platform_g_crop, |
| 123 | .try_mbus_fmt = soc_camera_platform_fill_fmt, |
| 124 | .g_mbus_fmt = soc_camera_platform_fill_fmt, |
| 125 | .s_mbus_fmt = soc_camera_platform_fill_fmt, |
| 126 | .g_mbus_config = soc_camera_platform_g_mbus_config, |
| 127 | }; |
| 128 | |
| 129 | static const struct v4l2_subdev_pad_ops platform_subdev_pad_ops = { |
| 130 | .enum_mbus_code = soc_camera_platform_enum_mbus_code, |
| 131 | }; |
| 132 | |
| 133 | static struct v4l2_subdev_ops platform_subdev_ops = { |
| 134 | .core = &platform_subdev_core_ops, |
| 135 | .video = &platform_subdev_video_ops, |
| 136 | .pad = &platform_subdev_pad_ops, |
| 137 | }; |
| 138 | |
| 139 | static int soc_camera_platform_probe(struct platform_device *pdev) |
| 140 | { |
| 141 | struct soc_camera_host *ici; |
| 142 | struct soc_camera_platform_priv *priv; |
| 143 | struct soc_camera_platform_info *p = pdev->dev.platform_data; |
| 144 | struct soc_camera_device *icd; |
| 145 | |
| 146 | if (!p) |
| 147 | return -EINVAL; |
| 148 | |
| 149 | if (!p->icd) { |
| 150 | dev_err(&pdev->dev, |
| 151 | "Platform has not set soc_camera_device pointer!\n"); |
| 152 | return -EINVAL; |
| 153 | } |
| 154 | |
| 155 | priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
| 156 | if (!priv) |
| 157 | return -ENOMEM; |
| 158 | |
| 159 | icd = p->icd; |
| 160 | |
| 161 | /* soc-camera convention: control's drvdata points to the subdev */ |
| 162 | platform_set_drvdata(pdev, &priv->subdev); |
| 163 | /* Set the control device reference */ |
| 164 | icd->control = &pdev->dev; |
| 165 | |
| 166 | ici = to_soc_camera_host(icd->parent); |
| 167 | |
| 168 | v4l2_subdev_init(&priv->subdev, &platform_subdev_ops); |
| 169 | v4l2_set_subdevdata(&priv->subdev, p); |
| 170 | strncpy(priv->subdev.name, dev_name(&pdev->dev), V4L2_SUBDEV_NAME_SIZE); |
| 171 | |
| 172 | return v4l2_device_register_subdev(&ici->v4l2_dev, &priv->subdev); |
| 173 | } |
| 174 | |
| 175 | static int soc_camera_platform_remove(struct platform_device *pdev) |
| 176 | { |
| 177 | struct soc_camera_platform_priv *priv = get_priv(pdev); |
| 178 | struct soc_camera_platform_info *p = v4l2_get_subdevdata(&priv->subdev); |
| 179 | |
| 180 | p->icd->control = NULL; |
| 181 | v4l2_device_unregister_subdev(&priv->subdev); |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | static struct platform_driver soc_camera_platform_driver = { |
| 186 | .driver = { |
| 187 | .name = "soc_camera_platform", |
| 188 | }, |
| 189 | .probe = soc_camera_platform_probe, |
| 190 | .remove = soc_camera_platform_remove, |
| 191 | }; |
| 192 | |
| 193 | module_platform_driver(soc_camera_platform_driver); |
| 194 | |
| 195 | MODULE_DESCRIPTION("SoC Camera Platform driver"); |
| 196 | MODULE_AUTHOR("Magnus Damm"); |
| 197 | MODULE_LICENSE("GPL v2"); |
| 198 | MODULE_ALIAS("platform:soc_camera_platform"); |