Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1 | /* |
| 2 | * camera image capture (abstract) bus driver |
| 3 | * |
| 4 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| 5 | * |
| 6 | * This driver provides an interface between platform-specific camera |
| 7 | * busses and camera devices. It should be used if the camera is |
| 8 | * connected not over a "proper" bus like PCI or USB, but over a |
| 9 | * special bus, like, for example, the Quick Capture interface on PXA270 |
| 10 | * SoCs. Later it should also be used for i.MX31 SoCs from Freescale. |
| 11 | * It can handle multiple cameras and / or multiple busses, which can |
| 12 | * be used, e.g., in stereo-vision applications. |
| 13 | * |
| 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. |
| 17 | */ |
| 18 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 19 | #include <linux/device.h> |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 20 | #include <linux/err.h> |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 21 | #include <linux/i2c.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/list.h> |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 24 | #include <linux/module.h> |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 25 | #include <linux/mutex.h> |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 26 | #include <linux/platform_device.h> |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 27 | #include <linux/pm_runtime.h> |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 28 | #include <linux/regulator/consumer.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 30 | #include <linux/vmalloc.h> |
| 31 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 32 | #include <media/soc_camera.h> |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 33 | #include <media/soc_mediabus.h> |
| 34 | #include <media/v4l2-async.h> |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 35 | #include <media/v4l2-clk.h> |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 36 | #include <media/v4l2-common.h> |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 37 | #include <media/v4l2-ioctl.h> |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 38 | #include <media/v4l2-dev.h> |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 39 | #include <media/v4l2-of.h> |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 40 | #include <media/videobuf-core.h> |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 41 | #include <media/videobuf2-core.h> |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 42 | |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 43 | /* Default to VGA resolution */ |
| 44 | #define DEFAULT_WIDTH 640 |
| 45 | #define DEFAULT_HEIGHT 480 |
| 46 | |
Guennadi Liakhovetski | aee5c2f | 2011-03-28 13:28:28 -0300 | [diff] [blame] | 47 | #define is_streaming(ici, icd) \ |
| 48 | (((ici)->ops->init_videobuf) ? \ |
| 49 | (icd)->vb_vidq.streaming : \ |
| 50 | vb2_is_streaming(&(icd)->vb2_vidq)) |
| 51 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 52 | #define MAP_MAX_NUM 32 |
| 53 | static DECLARE_BITMAP(device_map, MAP_MAX_NUM); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 54 | static LIST_HEAD(hosts); |
| 55 | static LIST_HEAD(devices); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 56 | /* |
| 57 | * Protects lists and bitmaps of hosts and devices. |
| 58 | * Lock nesting: Ok to take ->host_lock under list_lock. |
| 59 | */ |
| 60 | static DEFINE_MUTEX(list_lock); |
| 61 | |
| 62 | struct soc_camera_async_client { |
| 63 | struct v4l2_async_subdev *sensor; |
| 64 | struct v4l2_async_notifier notifier; |
| 65 | struct platform_device *pdev; |
| 66 | struct list_head list; /* needed for clean up */ |
| 67 | }; |
| 68 | |
| 69 | static int soc_camera_video_start(struct soc_camera_device *icd); |
| 70 | static int video_dev_create(struct soc_camera_device *icd); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 71 | |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 72 | int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd, |
| 73 | struct v4l2_clk *clk) |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 74 | { |
Guennadi Liakhovetski | 40f0753 | 2013-10-21 06:28:02 -0300 | [diff] [blame] | 75 | int ret; |
| 76 | bool clock_toggle; |
| 77 | |
| 78 | if (clk && (!ssdd->unbalanced_power || |
| 79 | !test_and_set_bit(0, &ssdd->clock_state))) { |
| 80 | ret = v4l2_clk_enable(clk); |
| 81 | if (ret < 0) { |
| 82 | dev_err(dev, "Cannot enable clock: %d\n", ret); |
| 83 | return ret; |
| 84 | } |
| 85 | clock_toggle = true; |
| 86 | } else { |
| 87 | clock_toggle = false; |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 88 | } |
Guennadi Liakhovetski | 40f0753 | 2013-10-21 06:28:02 -0300 | [diff] [blame] | 89 | |
Guennadi Liakhovetski | d3f884a | 2013-04-18 18:35:28 -0300 | [diff] [blame] | 90 | ret = regulator_bulk_enable(ssdd->sd_pdata.num_regulators, |
| 91 | ssdd->sd_pdata.regulators); |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 92 | if (ret < 0) { |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 93 | dev_err(dev, "Cannot enable regulators\n"); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 94 | goto eregenable; |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 95 | } |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 96 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 97 | if (ssdd->power) { |
| 98 | ret = ssdd->power(dev, 1); |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 99 | if (ret < 0) { |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 100 | dev_err(dev, |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 101 | "Platform failed to power-on the camera.\n"); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 102 | goto epwron; |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 103 | } |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 104 | } |
| 105 | |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 106 | return 0; |
| 107 | |
| 108 | epwron: |
Guennadi Liakhovetski | d3f884a | 2013-04-18 18:35:28 -0300 | [diff] [blame] | 109 | regulator_bulk_disable(ssdd->sd_pdata.num_regulators, |
| 110 | ssdd->sd_pdata.regulators); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 111 | eregenable: |
Guennadi Liakhovetski | 40f0753 | 2013-10-21 06:28:02 -0300 | [diff] [blame] | 112 | if (clock_toggle) |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 113 | v4l2_clk_disable(clk); |
| 114 | |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 115 | return ret; |
| 116 | } |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 117 | EXPORT_SYMBOL(soc_camera_power_on); |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 118 | |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 119 | int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd, |
| 120 | struct v4l2_clk *clk) |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 121 | { |
Laurent Pinchart | 24592ad | 2012-07-18 10:54:02 -0300 | [diff] [blame] | 122 | int ret = 0; |
| 123 | int err; |
Guennadi Liakhovetski | 7b9d8c3 | 2011-09-08 04:36:06 -0300 | [diff] [blame] | 124 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 125 | if (ssdd->power) { |
| 126 | err = ssdd->power(dev, 0); |
Laurent Pinchart | 24592ad | 2012-07-18 10:54:02 -0300 | [diff] [blame] | 127 | if (err < 0) { |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 128 | dev_err(dev, |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 129 | "Platform failed to power-off the camera.\n"); |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 130 | ret = err; |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 131 | } |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 132 | } |
| 133 | |
Guennadi Liakhovetski | d3f884a | 2013-04-18 18:35:28 -0300 | [diff] [blame] | 134 | err = regulator_bulk_disable(ssdd->sd_pdata.num_regulators, |
| 135 | ssdd->sd_pdata.regulators); |
Laurent Pinchart | 24592ad | 2012-07-18 10:54:02 -0300 | [diff] [blame] | 136 | if (err < 0) { |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 137 | dev_err(dev, "Cannot disable regulators\n"); |
Laurent Pinchart | 24592ad | 2012-07-18 10:54:02 -0300 | [diff] [blame] | 138 | ret = ret ? : err; |
| 139 | } |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 140 | |
Guennadi Liakhovetski | 40f0753 | 2013-10-21 06:28:02 -0300 | [diff] [blame] | 141 | if (clk && (!ssdd->unbalanced_power || test_and_clear_bit(0, &ssdd->clock_state))) |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 142 | v4l2_clk_disable(clk); |
| 143 | |
Guennadi Liakhovetski | 3dcc731 | 2011-09-05 12:33:21 -0300 | [diff] [blame] | 144 | return ret; |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 145 | } |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 146 | EXPORT_SYMBOL(soc_camera_power_off); |
| 147 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 148 | int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd) |
| 149 | { |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 150 | /* Should not have any effect in synchronous case */ |
Guennadi Liakhovetski | d3f884a | 2013-04-18 18:35:28 -0300 | [diff] [blame] | 151 | return devm_regulator_bulk_get(dev, ssdd->sd_pdata.num_regulators, |
| 152 | ssdd->sd_pdata.regulators); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 153 | } |
| 154 | EXPORT_SYMBOL(soc_camera_power_init); |
| 155 | |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 156 | static int __soc_camera_power_on(struct soc_camera_device *icd) |
| 157 | { |
| 158 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 159 | int ret; |
| 160 | |
| 161 | ret = v4l2_subdev_call(sd, core, s_power, 1); |
| 162 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) |
| 163 | return ret; |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | static int __soc_camera_power_off(struct soc_camera_device *icd) |
| 169 | { |
| 170 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 171 | int ret; |
| 172 | |
| 173 | ret = v4l2_subdev_call(sd, core, s_power, 0); |
| 174 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) |
| 175 | return ret; |
| 176 | |
| 177 | return 0; |
| 178 | } |
Alberto Panizzo | 96e442c | 2010-12-02 07:43:37 -0300 | [diff] [blame] | 179 | |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 180 | static int soc_camera_clock_start(struct soc_camera_host *ici) |
| 181 | { |
| 182 | int ret; |
| 183 | |
| 184 | if (!ici->ops->clock_start) |
| 185 | return 0; |
| 186 | |
| 187 | mutex_lock(&ici->clk_lock); |
| 188 | ret = ici->ops->clock_start(ici); |
| 189 | mutex_unlock(&ici->clk_lock); |
| 190 | |
| 191 | return ret; |
| 192 | } |
| 193 | |
| 194 | static void soc_camera_clock_stop(struct soc_camera_host *ici) |
| 195 | { |
| 196 | if (!ici->ops->clock_stop) |
| 197 | return; |
| 198 | |
| 199 | mutex_lock(&ici->clk_lock); |
| 200 | ici->ops->clock_stop(ici); |
| 201 | mutex_unlock(&ici->clk_lock); |
| 202 | } |
| 203 | |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 204 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
| 205 | struct soc_camera_device *icd, unsigned int fourcc) |
| 206 | { |
| 207 | unsigned int i; |
| 208 | |
| 209 | for (i = 0; i < icd->num_user_formats; i++) |
| 210 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) |
| 211 | return icd->user_formats + i; |
| 212 | return NULL; |
| 213 | } |
| 214 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); |
| 215 | |
Guennadi Liakhovetski | bd73b36 | 2008-12-23 05:54:45 -0300 | [diff] [blame] | 216 | /** |
Guennadi Liakhovetski | 32c69fcc | 2011-07-26 11:38:01 -0300 | [diff] [blame] | 217 | * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 218 | * @ssdd: camera platform parameters |
Guennadi Liakhovetski | 32c69fcc | 2011-07-26 11:38:01 -0300 | [diff] [blame] | 219 | * @cfg: media bus configuration |
| 220 | * @return: resulting flags |
| 221 | */ |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 222 | unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd, |
Guennadi Liakhovetski | 32c69fcc | 2011-07-26 11:38:01 -0300 | [diff] [blame] | 223 | const struct v4l2_mbus_config *cfg) |
| 224 | { |
| 225 | unsigned long f, flags = cfg->flags; |
| 226 | |
| 227 | /* If only one of the two polarities is supported, switch to the opposite */ |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 228 | if (ssdd->flags & SOCAM_SENSOR_INVERT_HSYNC) { |
Guennadi Liakhovetski | 32c69fcc | 2011-07-26 11:38:01 -0300 | [diff] [blame] | 229 | f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW); |
| 230 | if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW) |
| 231 | flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW; |
| 232 | } |
| 233 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 234 | if (ssdd->flags & SOCAM_SENSOR_INVERT_VSYNC) { |
Guennadi Liakhovetski | 32c69fcc | 2011-07-26 11:38:01 -0300 | [diff] [blame] | 235 | f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW); |
| 236 | if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW) |
| 237 | flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW; |
| 238 | } |
| 239 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 240 | if (ssdd->flags & SOCAM_SENSOR_INVERT_PCLK) { |
Guennadi Liakhovetski | 32c69fcc | 2011-07-26 11:38:01 -0300 | [diff] [blame] | 241 | f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING); |
| 242 | if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING) |
| 243 | flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING; |
| 244 | } |
| 245 | |
| 246 | return flags; |
| 247 | } |
| 248 | EXPORT_SYMBOL(soc_camera_apply_board_flags); |
| 249 | |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 250 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
| 251 | ((x) >> 24) & 0xff |
| 252 | |
| 253 | static int soc_camera_try_fmt(struct soc_camera_device *icd, |
| 254 | struct v4l2_format *f) |
| 255 | { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 256 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Laurent Pinchart | bed8d80 | 2012-03-21 08:03:26 -0300 | [diff] [blame] | 257 | const struct soc_camera_format_xlate *xlate; |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 258 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 259 | int ret; |
| 260 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 261 | dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n", |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 262 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
| 263 | |
Albert Wang | a70a6c4 | 2012-08-01 02:45:41 -0300 | [diff] [blame] | 264 | if (pix->pixelformat != V4L2_PIX_FMT_JPEG && |
| 265 | !(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) { |
Laurent Pinchart | 914f05c | 2012-03-21 08:03:28 -0300 | [diff] [blame] | 266 | pix->bytesperline = 0; |
| 267 | pix->sizeimage = 0; |
| 268 | } |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 269 | |
| 270 | ret = ici->ops->try_fmt(icd, f); |
| 271 | if (ret < 0) |
| 272 | return ret; |
| 273 | |
Laurent Pinchart | bed8d80 | 2012-03-21 08:03:26 -0300 | [diff] [blame] | 274 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
| 275 | if (!xlate) |
| 276 | return -EINVAL; |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 277 | |
Laurent Pinchart | bed8d80 | 2012-03-21 08:03:26 -0300 | [diff] [blame] | 278 | ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt); |
| 279 | if (ret < 0) |
| 280 | return ret; |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 281 | |
Laurent Pinchart | bed8d80 | 2012-03-21 08:03:26 -0300 | [diff] [blame] | 282 | pix->bytesperline = max_t(u32, pix->bytesperline, ret); |
| 283 | |
| 284 | ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline, |
| 285 | pix->height); |
| 286 | if (ret < 0) |
| 287 | return ret; |
| 288 | |
| 289 | pix->sizeimage = max_t(u32, pix->sizeimage, ret); |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 290 | |
| 291 | return 0; |
| 292 | } |
| 293 | |
Hans Verkuil | 7293789 | 2008-06-01 10:35:18 -0300 | [diff] [blame] | 294 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
Guennadi Liakhovetski | abe4c47 | 2008-12-01 09:44:56 -0300 | [diff] [blame] | 295 | struct v4l2_format *f) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 296 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 297 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 298 | |
| 299 | WARN_ON(priv != file->private_data); |
| 300 | |
Guennadi Liakhovetski | d366d4a | 2011-03-21 06:33:25 -0300 | [diff] [blame] | 301 | /* Only single-plane capture is supported so far */ |
| 302 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 303 | return -EINVAL; |
| 304 | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 305 | /* limit format to hardware capabilities */ |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 306 | return soc_camera_try_fmt(icd, f); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | static int soc_camera_enum_input(struct file *file, void *priv, |
| 310 | struct v4l2_input *inp) |
| 311 | { |
Hans Verkuil | d53c0f7 | 2015-06-15 08:33:36 -0300 | [diff] [blame] | 312 | struct soc_camera_device *icd = file->private_data; |
| 313 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 314 | if (inp->index != 0) |
| 315 | return -EINVAL; |
| 316 | |
Guennadi Liakhovetski | 8318a64 | 2011-06-07 06:24:32 -0300 | [diff] [blame] | 317 | /* default is camera */ |
| 318 | inp->type = V4L2_INPUT_TYPE_CAMERA; |
Hans Verkuil | d53c0f7 | 2015-06-15 08:33:36 -0300 | [diff] [blame] | 319 | inp->std = icd->vdev->tvnorms; |
Guennadi Liakhovetski | 8318a64 | 2011-06-07 06:24:32 -0300 | [diff] [blame] | 320 | strcpy(inp->name, "Camera"); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 321 | |
Guennadi Liakhovetski | 8318a64 | 2011-06-07 06:24:32 -0300 | [diff] [blame] | 322 | return 0; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) |
| 326 | { |
| 327 | *i = 0; |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) |
| 333 | { |
| 334 | if (i > 0) |
| 335 | return -EINVAL; |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
Hans Verkuil | 314527a | 2013-03-15 06:10:40 -0300 | [diff] [blame] | 340 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id a) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 341 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 342 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | c9c1f1c | 2009-08-25 11:46:59 -0300 | [diff] [blame] | 343 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
Kuninori Morimoto | 513791a | 2008-12-18 12:46:45 -0300 | [diff] [blame] | 344 | |
Laurent Pinchart | 8774bed | 2014-04-28 16:53:01 -0300 | [diff] [blame] | 345 | return v4l2_subdev_call(sd, video, s_std, a); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 346 | } |
| 347 | |
Guennadi Liakhovetski | 2f0babb | 2011-09-09 13:39:20 -0300 | [diff] [blame] | 348 | static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a) |
| 349 | { |
| 350 | struct soc_camera_device *icd = file->private_data; |
| 351 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 352 | |
Laurent Pinchart | 8774bed | 2014-04-28 16:53:01 -0300 | [diff] [blame] | 353 | return v4l2_subdev_call(sd, video, g_std, a); |
Guennadi Liakhovetski | 2f0babb | 2011-09-09 13:39:20 -0300 | [diff] [blame] | 354 | } |
| 355 | |
Guennadi Liakhovetski | ad3537b | 2012-05-08 13:00:51 -0300 | [diff] [blame] | 356 | static int soc_camera_enum_framesizes(struct file *file, void *fh, |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 357 | struct v4l2_frmsizeenum *fsize) |
| 358 | { |
| 359 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 360 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 361 | |
Guennadi Liakhovetski | ad3537b | 2012-05-08 13:00:51 -0300 | [diff] [blame] | 362 | return ici->ops->enum_framesizes(icd, fsize); |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 363 | } |
| 364 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 365 | static int soc_camera_reqbufs(struct file *file, void *priv, |
| 366 | struct v4l2_requestbuffers *p) |
| 367 | { |
| 368 | int ret; |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 369 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 370 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 371 | |
| 372 | WARN_ON(priv != file->private_data); |
| 373 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 374 | if (icd->streamer && icd->streamer != file) |
| 375 | return -EBUSY; |
| 376 | |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 377 | if (ici->ops->init_videobuf) { |
| 378 | ret = videobuf_reqbufs(&icd->vb_vidq, p); |
| 379 | if (ret < 0) |
| 380 | return ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 381 | |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 382 | ret = ici->ops->reqbufs(icd, p); |
| 383 | } else { |
| 384 | ret = vb2_reqbufs(&icd->vb2_vidq, p); |
| 385 | } |
| 386 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 387 | if (!ret && !icd->streamer) |
| 388 | icd->streamer = file; |
| 389 | |
| 390 | return ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | static int soc_camera_querybuf(struct file *file, void *priv, |
| 394 | struct v4l2_buffer *p) |
| 395 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 396 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 397 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 398 | |
| 399 | WARN_ON(priv != file->private_data); |
| 400 | |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 401 | if (ici->ops->init_videobuf) |
| 402 | return videobuf_querybuf(&icd->vb_vidq, p); |
| 403 | else |
| 404 | return vb2_querybuf(&icd->vb2_vidq, p); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | static int soc_camera_qbuf(struct file *file, void *priv, |
| 408 | struct v4l2_buffer *p) |
| 409 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 410 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 411 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 412 | |
| 413 | WARN_ON(priv != file->private_data); |
| 414 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 415 | if (icd->streamer != file) |
| 416 | return -EBUSY; |
| 417 | |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 418 | if (ici->ops->init_videobuf) |
| 419 | return videobuf_qbuf(&icd->vb_vidq, p); |
| 420 | else |
| 421 | return vb2_qbuf(&icd->vb2_vidq, p); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | static int soc_camera_dqbuf(struct file *file, void *priv, |
| 425 | struct v4l2_buffer *p) |
| 426 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 427 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 428 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 429 | |
| 430 | WARN_ON(priv != file->private_data); |
| 431 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 432 | if (icd->streamer != file) |
| 433 | return -EBUSY; |
| 434 | |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 435 | if (ici->ops->init_videobuf) |
| 436 | return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); |
| 437 | else |
| 438 | return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 439 | } |
| 440 | |
Guennadi Liakhovetski | 7ae77ee | 2011-09-28 09:25:28 -0300 | [diff] [blame] | 441 | static int soc_camera_create_bufs(struct file *file, void *priv, |
| 442 | struct v4l2_create_buffers *create) |
| 443 | { |
| 444 | struct soc_camera_device *icd = file->private_data; |
| 445 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 446 | |
| 447 | /* videobuf2 only */ |
| 448 | if (ici->ops->init_videobuf) |
| 449 | return -EINVAL; |
| 450 | else |
| 451 | return vb2_create_bufs(&icd->vb2_vidq, create); |
| 452 | } |
| 453 | |
| 454 | static int soc_camera_prepare_buf(struct file *file, void *priv, |
| 455 | struct v4l2_buffer *b) |
| 456 | { |
| 457 | struct soc_camera_device *icd = file->private_data; |
| 458 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 459 | |
| 460 | /* videobuf2 only */ |
| 461 | if (ici->ops->init_videobuf) |
| 462 | return -EINVAL; |
| 463 | else |
| 464 | return vb2_prepare_buf(&icd->vb2_vidq, b); |
| 465 | } |
| 466 | |
Kazunori Kobayashi | c710f591 | 2014-09-11 03:09:38 -0300 | [diff] [blame] | 467 | static int soc_camera_expbuf(struct file *file, void *priv, |
| 468 | struct v4l2_exportbuffer *p) |
| 469 | { |
| 470 | struct soc_camera_device *icd = file->private_data; |
| 471 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 472 | |
Kazunori Kobayashi | c710f591 | 2014-09-11 03:09:38 -0300 | [diff] [blame] | 473 | /* videobuf2 only */ |
| 474 | if (ici->ops->init_videobuf) |
Hans Verkuil | eb01b1b | 2015-06-15 08:33:37 -0300 | [diff] [blame^] | 475 | return -ENOTTY; |
| 476 | |
| 477 | if (icd->streamer && icd->streamer != file) |
| 478 | return -EBUSY; |
| 479 | return vb2_expbuf(&icd->vb2_vidq, p); |
Kazunori Kobayashi | c710f591 | 2014-09-11 03:09:38 -0300 | [diff] [blame] | 480 | } |
| 481 | |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 482 | /* Always entered with .host_lock held */ |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 483 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
| 484 | { |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 485 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 486 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Hans Verkuil | 3805f20 | 2010-05-08 17:55:00 -0300 | [diff] [blame] | 487 | unsigned int i, fmts = 0, raw_fmts = 0; |
| 488 | int ret; |
Hans Verkuil | ebcff5f | 2015-04-09 04:01:33 -0300 | [diff] [blame] | 489 | struct v4l2_subdev_mbus_code_enum code = { |
| 490 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| 491 | }; |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 492 | |
Hans Verkuil | ebcff5f | 2015-04-09 04:01:33 -0300 | [diff] [blame] | 493 | while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) { |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 494 | raw_fmts++; |
Hans Verkuil | ebcff5f | 2015-04-09 04:01:33 -0300 | [diff] [blame] | 495 | code.index++; |
| 496 | } |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 497 | |
| 498 | if (!ici->ops->get_formats) |
| 499 | /* |
| 500 | * Fallback mode - the host will have to serve all |
| 501 | * sensor-provided formats one-to-one to the user |
| 502 | */ |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 503 | fmts = raw_fmts; |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 504 | else |
| 505 | /* |
| 506 | * First pass - only count formats this host-sensor |
| 507 | * configuration can provide |
| 508 | */ |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 509 | for (i = 0; i < raw_fmts; i++) { |
Guennadi Liakhovetski | fa48984 | 2009-08-25 11:46:43 -0300 | [diff] [blame] | 510 | ret = ici->ops->get_formats(icd, i, NULL); |
| 511 | if (ret < 0) |
| 512 | return ret; |
| 513 | fmts += ret; |
| 514 | } |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 515 | |
| 516 | if (!fmts) |
| 517 | return -ENXIO; |
| 518 | |
| 519 | icd->user_formats = |
| 520 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); |
| 521 | if (!icd->user_formats) |
| 522 | return -ENOMEM; |
| 523 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 524 | dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts); |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 525 | |
| 526 | /* Second pass - actually fill data formats */ |
Stefan Herbrechtsmeier | 14df2cc | 2009-06-24 10:31:25 -0300 | [diff] [blame] | 527 | fmts = 0; |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 528 | for (i = 0; i < raw_fmts; i++) |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 529 | if (!ici->ops->get_formats) { |
Hans Verkuil | ebcff5f | 2015-04-09 04:01:33 -0300 | [diff] [blame] | 530 | code.index = i; |
| 531 | v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code); |
Guennadi Liakhovetski | d2dcad4 | 2011-05-18 06:49:54 -0300 | [diff] [blame] | 532 | icd->user_formats[fmts].host_fmt = |
Hans Verkuil | ebcff5f | 2015-04-09 04:01:33 -0300 | [diff] [blame] | 533 | soc_mbus_get_fmtdesc(code.code); |
Guennadi Liakhovetski | d2dcad4 | 2011-05-18 06:49:54 -0300 | [diff] [blame] | 534 | if (icd->user_formats[fmts].host_fmt) |
Hans Verkuil | ebcff5f | 2015-04-09 04:01:33 -0300 | [diff] [blame] | 535 | icd->user_formats[fmts++].code = code.code; |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 536 | } else { |
Guennadi Liakhovetski | fa48984 | 2009-08-25 11:46:43 -0300 | [diff] [blame] | 537 | ret = ici->ops->get_formats(icd, i, |
| 538 | &icd->user_formats[fmts]); |
| 539 | if (ret < 0) |
| 540 | goto egfmt; |
| 541 | fmts += ret; |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 542 | } |
| 543 | |
Guennadi Liakhovetski | d2dcad4 | 2011-05-18 06:49:54 -0300 | [diff] [blame] | 544 | icd->num_user_formats = fmts; |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 545 | icd->current_fmt = &icd->user_formats[0]; |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 546 | |
| 547 | return 0; |
Guennadi Liakhovetski | fa48984 | 2009-08-25 11:46:43 -0300 | [diff] [blame] | 548 | |
| 549 | egfmt: |
Guennadi Liakhovetski | fa48984 | 2009-08-25 11:46:43 -0300 | [diff] [blame] | 550 | vfree(icd->user_formats); |
| 551 | return ret; |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 552 | } |
| 553 | |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 554 | /* Always entered with .host_lock held */ |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 555 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
| 556 | { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 557 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | fa48984 | 2009-08-25 11:46:43 -0300 | [diff] [blame] | 558 | |
| 559 | if (ici->ops->put_formats) |
| 560 | ici->ops->put_formats(icd); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 561 | icd->current_fmt = NULL; |
Guennadi Liakhovetski | fa48984 | 2009-08-25 11:46:43 -0300 | [diff] [blame] | 562 | icd->num_user_formats = 0; |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 563 | vfree(icd->user_formats); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 564 | icd->user_formats = NULL; |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 565 | } |
| 566 | |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 567 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 568 | static int soc_camera_set_fmt(struct soc_camera_device *icd, |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 569 | struct v4l2_format *f) |
| 570 | { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 571 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 572 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 573 | int ret; |
| 574 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 575 | dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n", |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 576 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
| 577 | |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 578 | /* We always call try_fmt() before set_fmt() or set_crop() */ |
Sergio Aguirre | dca6b6d | 2011-04-11 13:14:33 -0300 | [diff] [blame] | 579 | ret = soc_camera_try_fmt(icd, f); |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 580 | if (ret < 0) |
| 581 | return ret; |
| 582 | |
| 583 | ret = ici->ops->set_fmt(icd, f); |
| 584 | if (ret < 0) { |
| 585 | return ret; |
| 586 | } else if (!icd->current_fmt || |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 587 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 588 | dev_err(icd->pdev, |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 589 | "Host driver hasn't set up current format correctly!\n"); |
| 590 | return -EINVAL; |
| 591 | } |
| 592 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 593 | icd->user_width = pix->width; |
| 594 | icd->user_height = pix->height; |
Sergio Aguirre | 0e4c180 | 2011-03-07 21:49:48 -0300 | [diff] [blame] | 595 | icd->bytesperline = pix->bytesperline; |
| 596 | icd->sizeimage = pix->sizeimage; |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 597 | icd->colorspace = pix->colorspace; |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 598 | icd->field = pix->field; |
| 599 | if (ici->ops->init_videobuf) |
| 600 | icd->vb_vidq.field = pix->field; |
Guennadi Liakhovetski | 025c18a | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 601 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 602 | dev_dbg(icd->pdev, "set width: %d height: %d\n", |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 603 | icd->user_width, icd->user_height); |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 604 | |
| 605 | /* set physical bus parameters */ |
Guennadi Liakhovetski | 8843d11 | 2011-09-21 17:52:51 -0300 | [diff] [blame] | 606 | return ici->ops->set_bus_param(icd); |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 607 | } |
| 608 | |
Guennadi Liakhovetski | f7f6ce2 | 2013-04-04 08:21:12 -0300 | [diff] [blame] | 609 | static int soc_camera_add_device(struct soc_camera_device *icd) |
| 610 | { |
| 611 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 612 | int ret; |
| 613 | |
| 614 | if (ici->icd) |
| 615 | return -EBUSY; |
| 616 | |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 617 | if (!icd->clk) { |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 618 | ret = soc_camera_clock_start(ici); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 619 | if (ret < 0) |
| 620 | return ret; |
| 621 | } |
Guennadi Liakhovetski | a78fcc1 | 2013-04-04 13:19:58 -0300 | [diff] [blame] | 622 | |
| 623 | if (ici->ops->add) { |
| 624 | ret = ici->ops->add(icd); |
| 625 | if (ret < 0) |
| 626 | goto eadd; |
| 627 | } |
Guennadi Liakhovetski | eb569cf9 | 2013-04-04 08:51:36 -0300 | [diff] [blame] | 628 | |
| 629 | ici->icd = icd; |
| 630 | |
| 631 | return 0; |
| 632 | |
| 633 | eadd: |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 634 | if (!icd->clk) |
| 635 | soc_camera_clock_stop(ici); |
Guennadi Liakhovetski | f7f6ce2 | 2013-04-04 08:21:12 -0300 | [diff] [blame] | 636 | return ret; |
| 637 | } |
| 638 | |
| 639 | static void soc_camera_remove_device(struct soc_camera_device *icd) |
| 640 | { |
| 641 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 642 | |
| 643 | if (WARN_ON(icd != ici->icd)) |
| 644 | return; |
| 645 | |
Guennadi Liakhovetski | a78fcc1 | 2013-04-04 13:19:58 -0300 | [diff] [blame] | 646 | if (ici->ops->remove) |
| 647 | ici->ops->remove(icd); |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 648 | if (!icd->clk) |
| 649 | soc_camera_clock_stop(ici); |
Guennadi Liakhovetski | f7f6ce2 | 2013-04-04 08:21:12 -0300 | [diff] [blame] | 650 | ici->icd = NULL; |
| 651 | } |
| 652 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 653 | static int soc_camera_open(struct file *file) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 654 | { |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 655 | struct video_device *vdev = video_devdata(file); |
Guennadi Liakhovetski | 2400a1f | 2013-01-09 09:14:48 -0300 | [diff] [blame] | 656 | struct soc_camera_device *icd; |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 657 | struct soc_camera_host *ici; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 658 | int ret; |
| 659 | |
Guennadi Liakhovetski | 7d051b3 | 2012-12-20 13:02:51 -0300 | [diff] [blame] | 660 | /* |
| 661 | * Don't mess with the host during probe: wait until the loop in |
Guennadi Liakhovetski | 2400a1f | 2013-01-09 09:14:48 -0300 | [diff] [blame] | 662 | * scan_add_host() completes. Also protect against a race with |
| 663 | * soc_camera_host_unregister(). |
Guennadi Liakhovetski | 7d051b3 | 2012-12-20 13:02:51 -0300 | [diff] [blame] | 664 | */ |
| 665 | if (mutex_lock_interruptible(&list_lock)) |
| 666 | return -ERESTARTSYS; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 667 | |
Guennadi Liakhovetski | 2400a1f | 2013-01-09 09:14:48 -0300 | [diff] [blame] | 668 | if (!vdev || !video_is_registered(vdev)) { |
| 669 | mutex_unlock(&list_lock); |
| 670 | return -ENODEV; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 671 | } |
| 672 | |
Hans Verkuil | 14381c2 | 2013-06-10 09:27:41 -0300 | [diff] [blame] | 673 | icd = video_get_drvdata(vdev); |
Guennadi Liakhovetski | 2400a1f | 2013-01-09 09:14:48 -0300 | [diff] [blame] | 674 | ici = to_soc_camera_host(icd->parent); |
| 675 | |
| 676 | ret = try_module_get(ici->ops->owner) ? 0 : -ENODEV; |
| 677 | mutex_unlock(&list_lock); |
| 678 | |
| 679 | if (ret < 0) { |
| 680 | dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); |
| 681 | return ret; |
| 682 | } |
| 683 | |
| 684 | if (!to_soc_camera_control(icd)) { |
| 685 | /* No device driver attached */ |
| 686 | ret = -ENODEV; |
| 687 | goto econtrol; |
| 688 | } |
| 689 | |
| 690 | if (mutex_lock_interruptible(&ici->host_lock)) { |
| 691 | ret = -ERESTARTSYS; |
| 692 | goto elockhost; |
| 693 | } |
Guennadi Liakhovetski | 1a0063a | 2008-04-04 13:46:34 -0300 | [diff] [blame] | 694 | icd->use_count++; |
| 695 | |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 696 | /* Now we really have to activate the camera */ |
| 697 | if (icd->use_count == 1) { |
Guennadi Liakhovetski | 2400a1f | 2013-01-09 09:14:48 -0300 | [diff] [blame] | 698 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
Guennadi Liakhovetski | 025c18a | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 699 | /* Restore parameters before the last close() per V4L2 API */ |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 700 | struct v4l2_format f = { |
| 701 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| 702 | .fmt.pix = { |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 703 | .width = icd->user_width, |
| 704 | .height = icd->user_height, |
Guennadi Liakhovetski | 025c18a | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 705 | .field = icd->field, |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 706 | .colorspace = icd->colorspace, |
| 707 | .pixelformat = |
| 708 | icd->current_fmt->host_fmt->fourcc, |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 709 | }, |
| 710 | }; |
| 711 | |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 712 | /* The camera could have been already on, try to reset */ |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 713 | if (sdesc->subdev_desc.reset) |
Josh Wu | 0b9508a | 2015-02-10 06:31:33 -0300 | [diff] [blame] | 714 | if (icd->control) |
| 715 | sdesc->subdev_desc.reset(icd->control); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 716 | |
Guennadi Liakhovetski | f7f6ce2 | 2013-04-04 08:21:12 -0300 | [diff] [blame] | 717 | ret = soc_camera_add_device(icd); |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 718 | if (ret < 0) { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 719 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 720 | goto eiciadd; |
| 721 | } |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 722 | |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 723 | ret = __soc_camera_power_on(icd); |
Guennadi Liakhovetski | 7705b6d | 2012-03-14 07:22:07 -0300 | [diff] [blame] | 724 | if (ret < 0) |
| 725 | goto epower; |
| 726 | |
Mauro Carvalho Chehab | 4f9fb5e | 2010-05-18 00:46:09 -0300 | [diff] [blame] | 727 | pm_runtime_enable(&icd->vdev->dev); |
| 728 | ret = pm_runtime_resume(&icd->vdev->dev); |
| 729 | if (ret < 0 && ret != -ENOSYS) |
| 730 | goto eresume; |
| 731 | |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 732 | /* |
| 733 | * Try to configure with default parameters. Notice: this is the |
| 734 | * very first open, so, we cannot race against other calls, |
| 735 | * apart from someone else calling open() simultaneously, but |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 736 | * .host_lock is protecting us against it. |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 737 | */ |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 738 | ret = soc_camera_set_fmt(icd, &f); |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 739 | if (ret < 0) |
| 740 | goto esfmt; |
Guennadi Liakhovetski | 24d8c02 | 2010-12-25 18:29:52 -0300 | [diff] [blame] | 741 | |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 742 | if (ici->ops->init_videobuf) { |
| 743 | ici->ops->init_videobuf(&icd->vb_vidq, icd); |
| 744 | } else { |
| 745 | ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); |
| 746 | if (ret < 0) |
| 747 | goto einitvb; |
| 748 | } |
Hans Verkuil | ee02da6 | 2011-09-06 12:36:39 -0300 | [diff] [blame] | 749 | v4l2_ctrl_handler_setup(&icd->ctrl_handler); |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 750 | } |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 751 | mutex_unlock(&ici->host_lock); |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 752 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 753 | file->private_data = icd; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 754 | dev_dbg(icd->pdev, "camera device open\n"); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 755 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 756 | return 0; |
| 757 | |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 758 | /* |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 759 | * All errors are entered with the .host_lock held, first four also |
| 760 | * with use_count == 1 |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 761 | */ |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 762 | einitvb: |
Guennadi Liakhovetski | df2ed07 | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 763 | esfmt: |
Mauro Carvalho Chehab | 4f9fb5e | 2010-05-18 00:46:09 -0300 | [diff] [blame] | 764 | pm_runtime_disable(&icd->vdev->dev); |
| 765 | eresume: |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 766 | __soc_camera_power_off(icd); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 767 | epower: |
Guennadi Liakhovetski | f7f6ce2 | 2013-04-04 08:21:12 -0300 | [diff] [blame] | 768 | soc_camera_remove_device(icd); |
Guennadi Liakhovetski | 7705b6d | 2012-03-14 07:22:07 -0300 | [diff] [blame] | 769 | eiciadd: |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 770 | icd->use_count--; |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 771 | mutex_unlock(&ici->host_lock); |
Guennadi Liakhovetski | 2400a1f | 2013-01-09 09:14:48 -0300 | [diff] [blame] | 772 | elockhost: |
| 773 | econtrol: |
| 774 | module_put(ici->ops->owner); |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 775 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 776 | return ret; |
| 777 | } |
| 778 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 779 | static int soc_camera_close(struct file *file) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 780 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 781 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 782 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 783 | |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 784 | mutex_lock(&ici->host_lock); |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 785 | icd->use_count--; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 786 | if (!icd->use_count) { |
Mauro Carvalho Chehab | 4f9fb5e | 2010-05-18 00:46:09 -0300 | [diff] [blame] | 787 | pm_runtime_suspend(&icd->vdev->dev); |
| 788 | pm_runtime_disable(&icd->vdev->dev); |
| 789 | |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 790 | if (ici->ops->init_videobuf2) |
| 791 | vb2_queue_release(&icd->vb2_vidq); |
Laurent Pinchart | 4ec10ba | 2012-07-20 10:19:50 -0300 | [diff] [blame] | 792 | __soc_camera_power_off(icd); |
Wenbing Wang | af44ad5 | 2013-06-05 06:37:14 -0300 | [diff] [blame] | 793 | |
Guennadi Liakhovetski | f7f6ce2 | 2013-04-04 08:21:12 -0300 | [diff] [blame] | 794 | soc_camera_remove_device(icd); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 795 | } |
Guennadi Liakhovetski | 025c18a | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 796 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 797 | if (icd->streamer == file) |
| 798 | icd->streamer = NULL; |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 799 | mutex_unlock(&ici->host_lock); |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 800 | |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 801 | module_put(ici->ops->owner); |
Guennadi Liakhovetski | 9dc4e48 | 2008-04-22 14:45:32 -0300 | [diff] [blame] | 802 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 803 | dev_dbg(icd->pdev, "camera device close\n"); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 804 | |
| 805 | return 0; |
| 806 | } |
| 807 | |
Andrew Morton | aba360d | 2008-04-22 14:45:59 -0300 | [diff] [blame] | 808 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
Guennadi Liakhovetski | abe4c47 | 2008-12-01 09:44:56 -0300 | [diff] [blame] | 809 | size_t count, loff_t *ppos) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 810 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 811 | struct soc_camera_device *icd = file->private_data; |
Anatolij Gustschin | 1438be56 | 2012-08-24 11:36:11 -0300 | [diff] [blame] | 812 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 813 | |
| 814 | dev_dbg(icd->pdev, "read called, buf %p\n", buf); |
| 815 | |
| 816 | if (ici->ops->init_videobuf2 && icd->vb2_vidq.io_modes & VB2_READ) |
| 817 | return vb2_read(&icd->vb2_vidq, buf, count, ppos, |
| 818 | file->f_flags & O_NONBLOCK); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 819 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 820 | dev_err(icd->pdev, "camera device read not implemented\n"); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 821 | |
Anatolij Gustschin | 1438be56 | 2012-08-24 11:36:11 -0300 | [diff] [blame] | 822 | return -EINVAL; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) |
| 826 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 827 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 828 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 829 | int err; |
| 830 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 831 | dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 832 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 833 | if (icd->streamer != file) |
| 834 | return -EBUSY; |
| 835 | |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 836 | if (mutex_lock_interruptible(&ici->host_lock)) |
Hans Verkuil | 8422b08 | 2012-06-24 06:49:09 -0300 | [diff] [blame] | 837 | return -ERESTARTSYS; |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 838 | if (ici->ops->init_videobuf) |
| 839 | err = videobuf_mmap_mapper(&icd->vb_vidq, vma); |
| 840 | else |
| 841 | err = vb2_mmap(&icd->vb2_vidq, vma); |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 842 | mutex_unlock(&ici->host_lock); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 843 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 844 | dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 845 | (unsigned long)vma->vm_start, |
| 846 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, |
| 847 | err); |
| 848 | |
| 849 | return err; |
| 850 | } |
| 851 | |
| 852 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) |
| 853 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 854 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 855 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Hans Verkuil | 8422b08 | 2012-06-24 06:49:09 -0300 | [diff] [blame] | 856 | unsigned res = POLLERR; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 857 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 858 | if (icd->streamer != file) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 859 | return POLLERR; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 860 | |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 861 | mutex_lock(&ici->host_lock); |
Hans Verkuil | 8422b08 | 2012-06-24 06:49:09 -0300 | [diff] [blame] | 862 | if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) |
| 863 | dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); |
| 864 | else |
| 865 | res = ici->ops->poll(file, pt); |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 866 | mutex_unlock(&ici->host_lock); |
Hans Verkuil | 8422b08 | 2012-06-24 06:49:09 -0300 | [diff] [blame] | 867 | return res; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 868 | } |
| 869 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 870 | static struct v4l2_file_operations soc_camera_fops = { |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 871 | .owner = THIS_MODULE, |
| 872 | .open = soc_camera_open, |
| 873 | .release = soc_camera_close, |
Guennadi Liakhovetski | b6a633c | 2010-12-25 17:40:26 -0300 | [diff] [blame] | 874 | .unlocked_ioctl = video_ioctl2, |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 875 | .read = soc_camera_read, |
| 876 | .mmap = soc_camera_mmap, |
| 877 | .poll = soc_camera_poll, |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 878 | }; |
| 879 | |
Hans Verkuil | 7293789 | 2008-06-01 10:35:18 -0300 | [diff] [blame] | 880 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
Guennadi Liakhovetski | abe4c47 | 2008-12-01 09:44:56 -0300 | [diff] [blame] | 881 | struct v4l2_format *f) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 882 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 883 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 884 | int ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 885 | |
| 886 | WARN_ON(priv != file->private_data); |
| 887 | |
Guennadi Liakhovetski | d366d4a | 2011-03-21 06:33:25 -0300 | [diff] [blame] | 888 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 889 | dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type); |
Guennadi Liakhovetski | d366d4a | 2011-03-21 06:33:25 -0300 | [diff] [blame] | 890 | return -EINVAL; |
| 891 | } |
| 892 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 893 | if (icd->streamer && icd->streamer != file) |
| 894 | return -EBUSY; |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 895 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 896 | if (is_streaming(to_soc_camera_host(icd->parent), icd)) { |
| 897 | dev_err(icd->pdev, "S_FMT denied: queue initialised\n"); |
Guennadi Liakhovetski | b6a633c | 2010-12-25 17:40:26 -0300 | [diff] [blame] | 898 | return -EBUSY; |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 899 | } |
| 900 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 901 | ret = soc_camera_set_fmt(icd, f); |
| 902 | |
| 903 | if (!ret && !icd->streamer) |
| 904 | icd->streamer = file; |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 905 | |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 906 | return ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 907 | } |
| 908 | |
Hans Verkuil | 7293789 | 2008-06-01 10:35:18 -0300 | [diff] [blame] | 909 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
Guennadi Liakhovetski | abe4c47 | 2008-12-01 09:44:56 -0300 | [diff] [blame] | 910 | struct v4l2_fmtdesc *f) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 911 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 912 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 913 | const struct soc_mbus_pixelfmt *format; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 914 | |
| 915 | WARN_ON(priv != file->private_data); |
| 916 | |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 917 | if (f->index >= icd->num_user_formats) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 918 | return -EINVAL; |
| 919 | |
Guennadi Liakhovetski | c2786ad | 2008-12-01 09:45:27 -0300 | [diff] [blame] | 920 | format = icd->user_formats[f->index].host_fmt; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 921 | |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 922 | if (format->name) |
| 923 | strlcpy(f->description, format->name, sizeof(f->description)); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 924 | f->pixelformat = format->fourcc; |
| 925 | return 0; |
| 926 | } |
| 927 | |
Hans Verkuil | 7293789 | 2008-06-01 10:35:18 -0300 | [diff] [blame] | 928 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
Guennadi Liakhovetski | abe4c47 | 2008-12-01 09:44:56 -0300 | [diff] [blame] | 929 | struct v4l2_format *f) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 930 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 931 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 932 | struct v4l2_pix_format *pix = &f->fmt.pix; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 933 | |
| 934 | WARN_ON(priv != file->private_data); |
| 935 | |
Guennadi Liakhovetski | d366d4a | 2011-03-21 06:33:25 -0300 | [diff] [blame] | 936 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 937 | return -EINVAL; |
| 938 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 939 | pix->width = icd->user_width; |
| 940 | pix->height = icd->user_height; |
Sergio Aguirre | 0e4c180 | 2011-03-07 21:49:48 -0300 | [diff] [blame] | 941 | pix->bytesperline = icd->bytesperline; |
| 942 | pix->sizeimage = icd->sizeimage; |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 943 | pix->field = icd->field; |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 944 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 945 | pix->colorspace = icd->colorspace; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 946 | dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n", |
Guennadi Liakhovetski | 760697b | 2009-12-11 11:46:49 -0300 | [diff] [blame] | 947 | icd->current_fmt->host_fmt->fourcc); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 948 | return 0; |
| 949 | } |
| 950 | |
| 951 | static int soc_camera_querycap(struct file *file, void *priv, |
| 952 | struct v4l2_capability *cap) |
| 953 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 954 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 955 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 956 | |
| 957 | WARN_ON(priv != file->private_data); |
| 958 | |
| 959 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 960 | return ici->ops->querycap(ici, cap); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | static int soc_camera_streamon(struct file *file, void *priv, |
| 964 | enum v4l2_buf_type i) |
| 965 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 966 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 967 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | c9c1f1c | 2009-08-25 11:46:59 -0300 | [diff] [blame] | 968 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 969 | int ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 970 | |
| 971 | WARN_ON(priv != file->private_data); |
| 972 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 973 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 974 | return -EINVAL; |
| 975 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 976 | if (icd->streamer != file) |
| 977 | return -EBUSY; |
| 978 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 979 | /* This calls buf_queue from host driver's videobuf_queue_ops */ |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 980 | if (ici->ops->init_videobuf) |
| 981 | ret = videobuf_streamon(&icd->vb_vidq); |
| 982 | else |
| 983 | ret = vb2_streamon(&icd->vb2_vidq, i); |
| 984 | |
Anatolij Gustschin | 7fdbd85 | 2011-01-31 09:19:32 -0300 | [diff] [blame] | 985 | if (!ret) |
| 986 | v4l2_subdev_call(sd, video, s_stream, 1); |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 987 | |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 988 | return ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 989 | } |
| 990 | |
| 991 | static int soc_camera_streamoff(struct file *file, void *priv, |
| 992 | enum v4l2_buf_type i) |
| 993 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 994 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | c9c1f1c | 2009-08-25 11:46:59 -0300 | [diff] [blame] | 995 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 996 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 997 | |
| 998 | WARN_ON(priv != file->private_data); |
| 999 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1000 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 1001 | return -EINVAL; |
| 1002 | |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 1003 | if (icd->streamer != file) |
| 1004 | return -EBUSY; |
| 1005 | |
Guennadi Liakhovetski | 5d28d52 | 2009-12-11 11:15:05 -0300 | [diff] [blame] | 1006 | /* |
| 1007 | * This calls buf_release from host driver's videobuf_queue_ops for all |
| 1008 | * remaining buffers. When the last buffer is freed, stop capture |
| 1009 | */ |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 1010 | if (ici->ops->init_videobuf) |
| 1011 | videobuf_streamoff(&icd->vb_vidq); |
| 1012 | else |
| 1013 | vb2_streamoff(&icd->vb2_vidq, i); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1014 | |
Guennadi Liakhovetski | c9c1f1c | 2009-08-25 11:46:59 -0300 | [diff] [blame] | 1015 | v4l2_subdev_call(sd, video, s_stream, 0); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1016 | |
| 1017 | return 0; |
| 1018 | } |
| 1019 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1020 | static int soc_camera_cropcap(struct file *file, void *fh, |
| 1021 | struct v4l2_cropcap *a) |
| 1022 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 1023 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1024 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1025 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1026 | return ici->ops->cropcap(icd, a); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | static int soc_camera_g_crop(struct file *file, void *fh, |
| 1030 | struct v4l2_crop *a) |
| 1031 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 1032 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1033 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1034 | int ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1035 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1036 | ret = ici->ops->get_crop(icd, a); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1037 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1038 | return ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1039 | } |
| 1040 | |
Guennadi Liakhovetski | 68a54f0 | 2009-08-25 11:46:52 -0300 | [diff] [blame] | 1041 | /* |
| 1042 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop |
| 1043 | * argument with the actual geometry, instead, the user shall use G_CROP to |
Guennadi Liakhovetski | ab56d5e | 2010-03-23 11:31:46 -0300 | [diff] [blame] | 1044 | * retrieve it. |
Guennadi Liakhovetski | 68a54f0 | 2009-08-25 11:46:52 -0300 | [diff] [blame] | 1045 | */ |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1046 | static int soc_camera_s_crop(struct file *file, void *fh, |
Hans Verkuil | 4f99659 | 2012-09-05 05:10:48 -0300 | [diff] [blame] | 1047 | const struct v4l2_crop *a) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1048 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 1049 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1050 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Hans Verkuil | 4f99659 | 2012-09-05 05:10:48 -0300 | [diff] [blame] | 1051 | const struct v4l2_rect *rect = &a->c; |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1052 | struct v4l2_crop current_crop; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1053 | int ret; |
| 1054 | |
| 1055 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 1056 | return -EINVAL; |
| 1057 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1058 | dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n", |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1059 | rect->width, rect->height, rect->left, rect->top); |
| 1060 | |
Anatolij Gustschin | 605a410 | 2012-11-28 17:15:51 -0300 | [diff] [blame] | 1061 | current_crop.type = a->type; |
| 1062 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1063 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
| 1064 | ret = ici->ops->get_crop(icd, ¤t_crop); |
| 1065 | |
Guennadi Liakhovetski | b897a91 | 2009-08-25 11:46:53 -0300 | [diff] [blame] | 1066 | /* Prohibit window size change with initialised buffers */ |
Guennadi Liakhovetski | 103754a | 2010-08-05 19:23:44 -0300 | [diff] [blame] | 1067 | if (ret < 0) { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1068 | dev_err(icd->pdev, |
Guennadi Liakhovetski | 103754a | 2010-08-05 19:23:44 -0300 | [diff] [blame] | 1069 | "S_CROP denied: getting current crop failed\n"); |
Guennadi Liakhovetski | aee5c2f | 2011-03-28 13:28:28 -0300 | [diff] [blame] | 1070 | } else if ((a->c.width == current_crop.c.width && |
| 1071 | a->c.height == current_crop.c.height) || |
| 1072 | !is_streaming(ici, icd)) { |
| 1073 | /* same size or not streaming - use .set_crop() */ |
| 1074 | ret = ici->ops->set_crop(icd, a); |
| 1075 | } else if (ici->ops->set_livecrop) { |
| 1076 | ret = ici->ops->set_livecrop(icd, a); |
| 1077 | } else { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1078 | dev_err(icd->pdev, |
Guennadi Liakhovetski | b897a91 | 2009-08-25 11:46:53 -0300 | [diff] [blame] | 1079 | "S_CROP denied: queue initialised and sizes differ\n"); |
| 1080 | ret = -EBUSY; |
Guennadi Liakhovetski | b897a91 | 2009-08-25 11:46:53 -0300 | [diff] [blame] | 1081 | } |
| 1082 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1083 | return ret; |
| 1084 | } |
| 1085 | |
Guennadi Liakhovetski | 3bfb410 | 2012-06-22 13:40:08 -0300 | [diff] [blame] | 1086 | static int soc_camera_g_selection(struct file *file, void *fh, |
| 1087 | struct v4l2_selection *s) |
| 1088 | { |
| 1089 | struct soc_camera_device *icd = file->private_data; |
| 1090 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 1091 | |
| 1092 | /* With a wrong type no need to try to fall back to cropping */ |
| 1093 | if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 1094 | return -EINVAL; |
| 1095 | |
| 1096 | if (!ici->ops->get_selection) |
| 1097 | return -ENOTTY; |
| 1098 | |
| 1099 | return ici->ops->get_selection(icd, s); |
| 1100 | } |
| 1101 | |
| 1102 | static int soc_camera_s_selection(struct file *file, void *fh, |
| 1103 | struct v4l2_selection *s) |
| 1104 | { |
| 1105 | struct soc_camera_device *icd = file->private_data; |
| 1106 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 1107 | int ret; |
| 1108 | |
| 1109 | /* In all these cases cropping emulation will not help */ |
| 1110 | if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
Sylwester Nawrocki | eb3c311 | 2012-08-22 18:03:30 -0300 | [diff] [blame] | 1111 | (s->target != V4L2_SEL_TGT_COMPOSE && |
| 1112 | s->target != V4L2_SEL_TGT_CROP)) |
Guennadi Liakhovetski | 3bfb410 | 2012-06-22 13:40:08 -0300 | [diff] [blame] | 1113 | return -EINVAL; |
| 1114 | |
Sylwester Nawrocki | eb3c311 | 2012-08-22 18:03:30 -0300 | [diff] [blame] | 1115 | if (s->target == V4L2_SEL_TGT_COMPOSE) { |
Guennadi Liakhovetski | 3bfb410 | 2012-06-22 13:40:08 -0300 | [diff] [blame] | 1116 | /* No output size change during a running capture! */ |
| 1117 | if (is_streaming(ici, icd) && |
| 1118 | (icd->user_width != s->r.width || |
| 1119 | icd->user_height != s->r.height)) |
| 1120 | return -EBUSY; |
| 1121 | |
| 1122 | /* |
| 1123 | * Only one user is allowed to change the output format, touch |
| 1124 | * buffers, start / stop streaming, poll for data |
| 1125 | */ |
| 1126 | if (icd->streamer && icd->streamer != file) |
| 1127 | return -EBUSY; |
| 1128 | } |
| 1129 | |
| 1130 | if (!ici->ops->set_selection) |
| 1131 | return -ENOTTY; |
| 1132 | |
| 1133 | ret = ici->ops->set_selection(icd, s); |
| 1134 | if (!ret && |
Sylwester Nawrocki | eb3c311 | 2012-08-22 18:03:30 -0300 | [diff] [blame] | 1135 | s->target == V4L2_SEL_TGT_COMPOSE) { |
Guennadi Liakhovetski | 3bfb410 | 2012-06-22 13:40:08 -0300 | [diff] [blame] | 1136 | icd->user_width = s->r.width; |
| 1137 | icd->user_height = s->r.height; |
| 1138 | if (!icd->streamer) |
| 1139 | icd->streamer = file; |
| 1140 | } |
| 1141 | |
| 1142 | return ret; |
| 1143 | } |
| 1144 | |
Guennadi Liakhovetski | c9f6ef6 | 2010-02-09 18:00:30 +0100 | [diff] [blame] | 1145 | static int soc_camera_g_parm(struct file *file, void *fh, |
| 1146 | struct v4l2_streamparm *a) |
| 1147 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 1148 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1149 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | c9f6ef6 | 2010-02-09 18:00:30 +0100 | [diff] [blame] | 1150 | |
| 1151 | if (ici->ops->get_parm) |
| 1152 | return ici->ops->get_parm(icd, a); |
| 1153 | |
| 1154 | return -ENOIOCTLCMD; |
| 1155 | } |
| 1156 | |
| 1157 | static int soc_camera_s_parm(struct file *file, void *fh, |
| 1158 | struct v4l2_streamparm *a) |
| 1159 | { |
Guennadi Liakhovetski | 57bee29 | 2010-08-17 14:29:51 -0300 | [diff] [blame] | 1160 | struct soc_camera_device *icd = file->private_data; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1161 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | c9f6ef6 | 2010-02-09 18:00:30 +0100 | [diff] [blame] | 1162 | |
| 1163 | if (ici->ops->set_parm) |
| 1164 | return ici->ops->set_parm(icd, a); |
| 1165 | |
| 1166 | return -ENOIOCTLCMD; |
| 1167 | } |
| 1168 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1169 | static int soc_camera_probe(struct soc_camera_host *ici, |
| 1170 | struct soc_camera_device *icd); |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1171 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1172 | /* So far this function cannot fail */ |
| 1173 | static void scan_add_host(struct soc_camera_host *ici) |
| 1174 | { |
| 1175 | struct soc_camera_device *icd; |
| 1176 | |
Guennadi Liakhovetski | 7d051b3 | 2012-12-20 13:02:51 -0300 | [diff] [blame] | 1177 | mutex_lock(&list_lock); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1178 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1179 | list_for_each_entry(icd, &devices, list) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1180 | if (icd->iface == ici->nr) { |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1181 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
| 1182 | struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; |
| 1183 | |
| 1184 | /* The camera could have been already on, try to reset */ |
| 1185 | if (ssdd->reset) |
Josh Wu | 0b9508a | 2015-02-10 06:31:33 -0300 | [diff] [blame] | 1186 | if (icd->control) |
| 1187 | ssdd->reset(icd->control); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1188 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1189 | icd->parent = ici->v4l2_dev.dev; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1190 | |
| 1191 | /* Ignore errors */ |
| 1192 | soc_camera_probe(ici, icd); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1193 | } |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1194 | |
Guennadi Liakhovetski | 7d051b3 | 2012-12-20 13:02:51 -0300 | [diff] [blame] | 1195 | mutex_unlock(&list_lock); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1196 | } |
| 1197 | |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1198 | /* |
| 1199 | * It is invalid to call v4l2_clk_enable() after a successful probing |
| 1200 | * asynchronously outside of V4L2 operations, i.e. with .host_lock not held. |
| 1201 | */ |
| 1202 | static int soc_camera_clk_enable(struct v4l2_clk *clk) |
| 1203 | { |
| 1204 | struct soc_camera_device *icd = clk->priv; |
| 1205 | struct soc_camera_host *ici; |
| 1206 | |
| 1207 | if (!icd || !icd->parent) |
| 1208 | return -ENODEV; |
| 1209 | |
| 1210 | ici = to_soc_camera_host(icd->parent); |
| 1211 | |
| 1212 | if (!try_module_get(ici->ops->owner)) |
| 1213 | return -ENODEV; |
| 1214 | |
| 1215 | /* |
| 1216 | * If a different client is currently being probed, the host will tell |
| 1217 | * you to go |
| 1218 | */ |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 1219 | return soc_camera_clock_start(ici); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1220 | } |
| 1221 | |
| 1222 | static void soc_camera_clk_disable(struct v4l2_clk *clk) |
| 1223 | { |
| 1224 | struct soc_camera_device *icd = clk->priv; |
| 1225 | struct soc_camera_host *ici; |
| 1226 | |
| 1227 | if (!icd || !icd->parent) |
| 1228 | return; |
| 1229 | |
| 1230 | ici = to_soc_camera_host(icd->parent); |
| 1231 | |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 1232 | soc_camera_clock_stop(ici); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1233 | |
| 1234 | module_put(ici->ops->owner); |
| 1235 | } |
| 1236 | |
| 1237 | /* |
| 1238 | * Eventually, it would be more logical to make the respective host the clock |
| 1239 | * owner, but then we would have to copy this struct for each ici. Besides, it |
| 1240 | * would introduce the circular dependency problem, unless we port all client |
| 1241 | * drivers to release the clock, when not in use. |
| 1242 | */ |
| 1243 | static const struct v4l2_clk_ops soc_camera_clk_ops = { |
| 1244 | .owner = THIS_MODULE, |
| 1245 | .enable = soc_camera_clk_enable, |
| 1246 | .disable = soc_camera_clk_disable, |
| 1247 | }; |
| 1248 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1249 | static int soc_camera_dyn_pdev(struct soc_camera_desc *sdesc, |
| 1250 | struct soc_camera_async_client *sasc) |
| 1251 | { |
| 1252 | struct platform_device *pdev; |
| 1253 | int ret, i; |
| 1254 | |
| 1255 | mutex_lock(&list_lock); |
| 1256 | i = find_first_zero_bit(device_map, MAP_MAX_NUM); |
| 1257 | if (i < MAP_MAX_NUM) |
| 1258 | set_bit(i, device_map); |
| 1259 | mutex_unlock(&list_lock); |
| 1260 | if (i >= MAP_MAX_NUM) |
| 1261 | return -ENOMEM; |
| 1262 | |
| 1263 | pdev = platform_device_alloc("soc-camera-pdrv", i); |
| 1264 | if (!pdev) |
| 1265 | return -ENOMEM; |
| 1266 | |
| 1267 | ret = platform_device_add_data(pdev, sdesc, sizeof(*sdesc)); |
| 1268 | if (ret < 0) { |
| 1269 | platform_device_put(pdev); |
| 1270 | return ret; |
| 1271 | } |
| 1272 | |
| 1273 | sasc->pdev = pdev; |
| 1274 | |
| 1275 | return 0; |
| 1276 | } |
| 1277 | |
| 1278 | static struct soc_camera_device *soc_camera_add_pdev(struct soc_camera_async_client *sasc) |
| 1279 | { |
| 1280 | struct platform_device *pdev = sasc->pdev; |
| 1281 | int ret; |
| 1282 | |
| 1283 | ret = platform_device_add(pdev); |
| 1284 | if (ret < 0 || !pdev->dev.driver) |
| 1285 | return NULL; |
| 1286 | |
| 1287 | return platform_get_drvdata(pdev); |
| 1288 | } |
| 1289 | |
| 1290 | /* Locking: called with .host_lock held */ |
| 1291 | static int soc_camera_probe_finish(struct soc_camera_device *icd) |
| 1292 | { |
| 1293 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
Hans Verkuil | da298c6 | 2015-04-09 04:02:34 -0300 | [diff] [blame] | 1294 | struct v4l2_subdev_format fmt = { |
| 1295 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| 1296 | }; |
| 1297 | struct v4l2_mbus_framefmt *mf = &fmt.format; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1298 | int ret; |
| 1299 | |
| 1300 | sd->grp_id = soc_camera_grp_id(icd); |
| 1301 | v4l2_set_subdev_hostdata(sd, icd); |
| 1302 | |
Hans Verkuil | f6cc51a | 2014-02-17 08:44:14 -0300 | [diff] [blame] | 1303 | v4l2_subdev_call(sd, video, g_tvnorms, &icd->vdev->tvnorms); |
| 1304 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1305 | ret = v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler, NULL); |
| 1306 | if (ret < 0) |
| 1307 | return ret; |
| 1308 | |
| 1309 | ret = soc_camera_add_device(icd); |
| 1310 | if (ret < 0) { |
| 1311 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); |
| 1312 | return ret; |
| 1313 | } |
| 1314 | |
| 1315 | /* At this point client .probe() should have run already */ |
| 1316 | ret = soc_camera_init_user_formats(icd); |
| 1317 | if (ret < 0) |
| 1318 | goto eusrfmt; |
| 1319 | |
| 1320 | icd->field = V4L2_FIELD_ANY; |
| 1321 | |
| 1322 | ret = soc_camera_video_start(icd); |
| 1323 | if (ret < 0) |
| 1324 | goto evidstart; |
| 1325 | |
| 1326 | /* Try to improve our guess of a reasonable window format */ |
Hans Verkuil | da298c6 | 2015-04-09 04:02:34 -0300 | [diff] [blame] | 1327 | if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) { |
| 1328 | icd->user_width = mf->width; |
| 1329 | icd->user_height = mf->height; |
| 1330 | icd->colorspace = mf->colorspace; |
| 1331 | icd->field = mf->field; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1332 | } |
| 1333 | soc_camera_remove_device(icd); |
| 1334 | |
| 1335 | return 0; |
| 1336 | |
| 1337 | evidstart: |
| 1338 | soc_camera_free_user_formats(icd); |
| 1339 | eusrfmt: |
| 1340 | soc_camera_remove_device(icd); |
| 1341 | |
| 1342 | return ret; |
| 1343 | } |
| 1344 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1345 | #ifdef CONFIG_I2C_BOARDINFO |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1346 | static int soc_camera_i2c_init(struct soc_camera_device *icd, |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1347 | struct soc_camera_desc *sdesc) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1348 | { |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1349 | struct soc_camera_subdev_desc *ssdd; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1350 | struct i2c_client *client; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1351 | struct soc_camera_host *ici; |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1352 | struct soc_camera_host_desc *shd = &sdesc->host_desc; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1353 | struct i2c_adapter *adap; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1354 | struct v4l2_subdev *subdev; |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1355 | char clk_name[V4L2_SUBDEV_NAME_SIZE]; |
| 1356 | int ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1357 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1358 | /* First find out how we link the main client */ |
| 1359 | if (icd->sasc) { |
| 1360 | /* Async non-OF probing handled by the subdevice list */ |
| 1361 | return -EPROBE_DEFER; |
| 1362 | } |
| 1363 | |
| 1364 | ici = to_soc_camera_host(icd->parent); |
| 1365 | adap = i2c_get_adapter(shd->i2c_adapter_id); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1366 | if (!adap) { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1367 | dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n", |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1368 | shd->i2c_adapter_id); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1369 | return -ENODEV; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1370 | } |
| 1371 | |
Mauro Carvalho Chehab | 93623c8 | 2014-09-03 14:55:19 -0300 | [diff] [blame] | 1372 | ssdd = kmemdup(&sdesc->subdev_desc, sizeof(*ssdd), GFP_KERNEL); |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1373 | if (!ssdd) { |
| 1374 | ret = -ENOMEM; |
| 1375 | goto ealloc; |
| 1376 | } |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1377 | /* |
| 1378 | * In synchronous case we request regulators ourselves in |
| 1379 | * soc_camera_pdrv_probe(), make sure the subdevice driver doesn't try |
| 1380 | * to allocate them again. |
| 1381 | */ |
Guennadi Liakhovetski | d3f884a | 2013-04-18 18:35:28 -0300 | [diff] [blame] | 1382 | ssdd->sd_pdata.num_regulators = 0; |
| 1383 | ssdd->sd_pdata.regulators = NULL; |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1384 | shd->board_info->platform_data = ssdd; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1385 | |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1386 | snprintf(clk_name, sizeof(clk_name), "%d-%04x", |
| 1387 | shd->i2c_adapter_id, shd->board_info->addr); |
| 1388 | |
Guennadi Liakhovetski | a37462b | 2015-01-31 20:21:32 -0300 | [diff] [blame] | 1389 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1390 | if (IS_ERR(icd->clk)) { |
| 1391 | ret = PTR_ERR(icd->clk); |
| 1392 | goto eclkreg; |
| 1393 | } |
| 1394 | |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1395 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1396 | shd->board_info, NULL); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1397 | if (!subdev) { |
| 1398 | ret = -ENODEV; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1399 | goto ei2cnd; |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1400 | } |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1401 | |
Laurent Pinchart | c4ce6d1 | 2010-07-30 17:24:54 -0300 | [diff] [blame] | 1402 | client = v4l2_get_subdevdata(subdev); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1403 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1404 | /* Use to_i2c_client(dev) to recover the i2c client */ |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1405 | icd->control = &client->dev; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1406 | |
| 1407 | return 0; |
| 1408 | ei2cnd: |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1409 | v4l2_clk_unregister(icd->clk); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1410 | icd->clk = NULL; |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1411 | eclkreg: |
| 1412 | kfree(ssdd); |
| 1413 | ealloc: |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1414 | i2c_put_adapter(adap); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1415 | return ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1416 | } |
| 1417 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1418 | static void soc_camera_i2c_free(struct soc_camera_device *icd) |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1419 | { |
| 1420 | struct i2c_client *client = |
| 1421 | to_i2c_client(to_soc_camera_control(icd)); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1422 | struct i2c_adapter *adap; |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1423 | struct soc_camera_subdev_desc *ssdd; |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1424 | |
| 1425 | icd->control = NULL; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1426 | if (icd->sasc) |
| 1427 | return; |
| 1428 | |
| 1429 | adap = client->adapter; |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1430 | ssdd = client->dev.platform_data; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1431 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1432 | i2c_unregister_device(client); |
Guennadi Liakhovetski | c8dd707 | 2011-03-23 05:26:11 -0300 | [diff] [blame] | 1433 | i2c_put_adapter(adap); |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 1434 | kfree(ssdd); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1435 | v4l2_clk_unregister(icd->clk); |
| 1436 | icd->clk = NULL; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1437 | } |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1438 | |
| 1439 | /* |
| 1440 | * V4L2 asynchronous notifier callbacks. They are all called under a v4l2-async |
| 1441 | * internal global mutex, therefore cannot race against other asynchronous |
| 1442 | * events. Until notifier->complete() (soc_camera_async_complete()) is called, |
| 1443 | * the video device node is not registered and no V4L fops can occur. Unloading |
| 1444 | * of the host driver also calls a v4l2-async function, so also there we're |
| 1445 | * protected. |
| 1446 | */ |
| 1447 | static int soc_camera_async_bound(struct v4l2_async_notifier *notifier, |
| 1448 | struct v4l2_subdev *sd, |
| 1449 | struct v4l2_async_subdev *asd) |
| 1450 | { |
| 1451 | struct soc_camera_async_client *sasc = container_of(notifier, |
| 1452 | struct soc_camera_async_client, notifier); |
| 1453 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); |
| 1454 | |
| 1455 | if (asd == sasc->sensor && !WARN_ON(icd->control)) { |
| 1456 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 1457 | |
| 1458 | /* |
| 1459 | * Only now we get subdevice-specific information like |
| 1460 | * regulators, flags, callbacks, etc. |
| 1461 | */ |
| 1462 | if (client) { |
| 1463 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
| 1464 | struct soc_camera_subdev_desc *ssdd = |
| 1465 | soc_camera_i2c_to_desc(client); |
| 1466 | if (ssdd) { |
| 1467 | memcpy(&sdesc->subdev_desc, ssdd, |
| 1468 | sizeof(sdesc->subdev_desc)); |
| 1469 | if (ssdd->reset) |
Josh Wu | 0b9508a | 2015-02-10 06:31:33 -0300 | [diff] [blame] | 1470 | ssdd->reset(&client->dev); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1471 | } |
| 1472 | |
| 1473 | icd->control = &client->dev; |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | return 0; |
| 1478 | } |
| 1479 | |
| 1480 | static void soc_camera_async_unbind(struct v4l2_async_notifier *notifier, |
| 1481 | struct v4l2_subdev *sd, |
| 1482 | struct v4l2_async_subdev *asd) |
| 1483 | { |
| 1484 | struct soc_camera_async_client *sasc = container_of(notifier, |
| 1485 | struct soc_camera_async_client, notifier); |
| 1486 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); |
| 1487 | |
| 1488 | if (icd->clk) { |
| 1489 | v4l2_clk_unregister(icd->clk); |
| 1490 | icd->clk = NULL; |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | static int soc_camera_async_complete(struct v4l2_async_notifier *notifier) |
| 1495 | { |
| 1496 | struct soc_camera_async_client *sasc = container_of(notifier, |
| 1497 | struct soc_camera_async_client, notifier); |
| 1498 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); |
| 1499 | |
| 1500 | if (to_soc_camera_control(icd)) { |
| 1501 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| 1502 | int ret; |
| 1503 | |
| 1504 | mutex_lock(&list_lock); |
| 1505 | ret = soc_camera_probe(ici, icd); |
| 1506 | mutex_unlock(&list_lock); |
| 1507 | if (ret < 0) |
| 1508 | return ret; |
| 1509 | } |
| 1510 | |
| 1511 | return 0; |
| 1512 | } |
| 1513 | |
| 1514 | static int scan_async_group(struct soc_camera_host *ici, |
Guennadi Liakhovetski | f687f32 | 2013-06-24 05:19:19 -0300 | [diff] [blame] | 1515 | struct v4l2_async_subdev **asd, unsigned int size) |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1516 | { |
| 1517 | struct soc_camera_async_subdev *sasd; |
| 1518 | struct soc_camera_async_client *sasc; |
| 1519 | struct soc_camera_device *icd; |
| 1520 | struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; |
| 1521 | char clk_name[V4L2_SUBDEV_NAME_SIZE]; |
Hans Verkuil | 85e86c6 | 2013-07-25 09:40:34 -0300 | [diff] [blame] | 1522 | unsigned int i; |
| 1523 | int ret; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1524 | |
| 1525 | /* First look for a sensor */ |
| 1526 | for (i = 0; i < size; i++) { |
| 1527 | sasd = container_of(asd[i], struct soc_camera_async_subdev, asd); |
| 1528 | if (sasd->role == SOCAM_SUBDEV_DATA_SOURCE) |
| 1529 | break; |
| 1530 | } |
| 1531 | |
Hans Verkuil | 85e86c6 | 2013-07-25 09:40:34 -0300 | [diff] [blame] | 1532 | if (i >= size || asd[i]->match_type != V4L2_ASYNC_MATCH_I2C) { |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1533 | /* All useless */ |
| 1534 | dev_err(ici->v4l2_dev.dev, "No I2C data source found!\n"); |
| 1535 | return -ENODEV; |
| 1536 | } |
| 1537 | |
| 1538 | /* Or shall this be managed by the soc-camera device? */ |
| 1539 | sasc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sasc), GFP_KERNEL); |
| 1540 | if (!sasc) |
| 1541 | return -ENOMEM; |
| 1542 | |
| 1543 | /* HACK: just need a != NULL */ |
| 1544 | sdesc.host_desc.board_info = ERR_PTR(-ENODATA); |
| 1545 | |
| 1546 | ret = soc_camera_dyn_pdev(&sdesc, sasc); |
| 1547 | if (ret < 0) |
Guennadi Liakhovetski | 057c2a2 | 2014-05-03 13:05:08 -0300 | [diff] [blame] | 1548 | goto eallocpdev; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1549 | |
| 1550 | sasc->sensor = &sasd->asd; |
| 1551 | |
| 1552 | icd = soc_camera_add_pdev(sasc); |
| 1553 | if (!icd) { |
Guennadi Liakhovetski | 057c2a2 | 2014-05-03 13:05:08 -0300 | [diff] [blame] | 1554 | ret = -ENOMEM; |
| 1555 | goto eaddpdev; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1556 | } |
| 1557 | |
Sylwester Nawrocki | e8419d0 | 2013-07-19 12:31:10 -0300 | [diff] [blame] | 1558 | sasc->notifier.subdevs = asd; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1559 | sasc->notifier.num_subdevs = size; |
| 1560 | sasc->notifier.bound = soc_camera_async_bound; |
| 1561 | sasc->notifier.unbind = soc_camera_async_unbind; |
| 1562 | sasc->notifier.complete = soc_camera_async_complete; |
| 1563 | |
| 1564 | icd->sasc = sasc; |
| 1565 | icd->parent = ici->v4l2_dev.dev; |
| 1566 | |
| 1567 | snprintf(clk_name, sizeof(clk_name), "%d-%04x", |
| 1568 | sasd->asd.match.i2c.adapter_id, sasd->asd.match.i2c.address); |
| 1569 | |
Guennadi Liakhovetski | a37462b | 2015-01-31 20:21:32 -0300 | [diff] [blame] | 1570 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1571 | if (IS_ERR(icd->clk)) { |
| 1572 | ret = PTR_ERR(icd->clk); |
| 1573 | goto eclkreg; |
| 1574 | } |
| 1575 | |
| 1576 | ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); |
| 1577 | if (!ret) |
| 1578 | return 0; |
| 1579 | |
| 1580 | v4l2_clk_unregister(icd->clk); |
| 1581 | eclkreg: |
| 1582 | icd->clk = NULL; |
Guennadi Liakhovetski | 057c2a2 | 2014-05-03 13:05:08 -0300 | [diff] [blame] | 1583 | platform_device_del(sasc->pdev); |
| 1584 | eaddpdev: |
| 1585 | platform_device_put(sasc->pdev); |
| 1586 | eallocpdev: |
| 1587 | devm_kfree(ici->v4l2_dev.dev, sasc); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1588 | dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); |
| 1589 | |
| 1590 | return ret; |
| 1591 | } |
| 1592 | |
| 1593 | static void scan_async_host(struct soc_camera_host *ici) |
| 1594 | { |
| 1595 | struct v4l2_async_subdev **asd; |
| 1596 | int j; |
| 1597 | |
| 1598 | for (j = 0, asd = ici->asd; ici->asd_sizes[j]; j++) { |
| 1599 | scan_async_group(ici, asd, ici->asd_sizes[j]); |
| 1600 | asd += ici->asd_sizes[j]; |
| 1601 | } |
| 1602 | } |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1603 | #else |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1604 | #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) |
| 1605 | #define soc_camera_i2c_free(icd) do {} while (0) |
| 1606 | #define scan_async_host(ici) do {} while (0) |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1607 | #endif |
| 1608 | |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 1609 | #ifdef CONFIG_OF |
| 1610 | |
| 1611 | struct soc_of_info { |
| 1612 | struct soc_camera_async_subdev sasd; |
| 1613 | struct soc_camera_async_client sasc; |
| 1614 | struct v4l2_async_subdev *subdev; |
| 1615 | }; |
| 1616 | |
| 1617 | static int soc_of_bind(struct soc_camera_host *ici, |
| 1618 | struct device_node *ep, |
| 1619 | struct device_node *remote) |
| 1620 | { |
| 1621 | struct soc_camera_device *icd; |
| 1622 | struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; |
| 1623 | struct soc_camera_async_client *sasc; |
| 1624 | struct soc_of_info *info; |
| 1625 | struct i2c_client *client; |
| 1626 | char clk_name[V4L2_SUBDEV_NAME_SIZE]; |
| 1627 | int ret; |
| 1628 | |
| 1629 | /* allocate a new subdev and add match info to it */ |
| 1630 | info = devm_kzalloc(ici->v4l2_dev.dev, sizeof(struct soc_of_info), |
| 1631 | GFP_KERNEL); |
| 1632 | if (!info) |
| 1633 | return -ENOMEM; |
| 1634 | |
| 1635 | info->sasd.asd.match.of.node = remote; |
| 1636 | info->sasd.asd.match_type = V4L2_ASYNC_MATCH_OF; |
| 1637 | info->subdev = &info->sasd.asd; |
| 1638 | |
| 1639 | /* Or shall this be managed by the soc-camera device? */ |
| 1640 | sasc = &info->sasc; |
| 1641 | |
| 1642 | /* HACK: just need a != NULL */ |
| 1643 | sdesc.host_desc.board_info = ERR_PTR(-ENODATA); |
| 1644 | |
| 1645 | ret = soc_camera_dyn_pdev(&sdesc, sasc); |
| 1646 | if (ret < 0) |
| 1647 | goto eallocpdev; |
| 1648 | |
| 1649 | sasc->sensor = &info->sasd.asd; |
| 1650 | |
| 1651 | icd = soc_camera_add_pdev(sasc); |
| 1652 | if (!icd) { |
| 1653 | ret = -ENOMEM; |
| 1654 | goto eaddpdev; |
| 1655 | } |
| 1656 | |
| 1657 | sasc->notifier.subdevs = &info->subdev; |
| 1658 | sasc->notifier.num_subdevs = 1; |
| 1659 | sasc->notifier.bound = soc_camera_async_bound; |
| 1660 | sasc->notifier.unbind = soc_camera_async_unbind; |
| 1661 | sasc->notifier.complete = soc_camera_async_complete; |
| 1662 | |
| 1663 | icd->sasc = sasc; |
| 1664 | icd->parent = ici->v4l2_dev.dev; |
| 1665 | |
| 1666 | client = of_find_i2c_device_by_node(remote); |
| 1667 | |
| 1668 | if (client) |
| 1669 | snprintf(clk_name, sizeof(clk_name), "%d-%04x", |
| 1670 | client->adapter->nr, client->addr); |
| 1671 | else |
| 1672 | snprintf(clk_name, sizeof(clk_name), "of-%s", |
| 1673 | of_node_full_name(remote)); |
| 1674 | |
Guennadi Liakhovetski | a37462b | 2015-01-31 20:21:32 -0300 | [diff] [blame] | 1675 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 1676 | if (IS_ERR(icd->clk)) { |
| 1677 | ret = PTR_ERR(icd->clk); |
| 1678 | goto eclkreg; |
| 1679 | } |
| 1680 | |
| 1681 | ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); |
| 1682 | if (!ret) |
| 1683 | return 0; |
Laurent Pinchart | 2af12f0 | 2015-03-09 03:39:33 -0300 | [diff] [blame] | 1684 | |
| 1685 | v4l2_clk_unregister(icd->clk); |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 1686 | eclkreg: |
| 1687 | icd->clk = NULL; |
| 1688 | platform_device_del(sasc->pdev); |
| 1689 | eaddpdev: |
| 1690 | platform_device_put(sasc->pdev); |
| 1691 | eallocpdev: |
Geert Uytterhoeven | 8e48a2d54 | 2015-02-19 06:47:16 -0300 | [diff] [blame] | 1692 | devm_kfree(ici->v4l2_dev.dev, info); |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 1693 | dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); |
| 1694 | |
| 1695 | return ret; |
| 1696 | } |
| 1697 | |
| 1698 | static void scan_of_host(struct soc_camera_host *ici) |
| 1699 | { |
| 1700 | struct device *dev = ici->v4l2_dev.dev; |
| 1701 | struct device_node *np = dev->of_node; |
| 1702 | struct device_node *epn = NULL, *ren; |
| 1703 | unsigned int i; |
| 1704 | |
| 1705 | for (i = 0; ; i++) { |
| 1706 | epn = of_graph_get_next_endpoint(np, epn); |
| 1707 | if (!epn) |
| 1708 | break; |
| 1709 | |
| 1710 | ren = of_graph_get_remote_port(epn); |
| 1711 | if (!ren) { |
| 1712 | dev_notice(dev, "no remote for %s\n", |
| 1713 | of_node_full_name(epn)); |
| 1714 | continue; |
| 1715 | } |
| 1716 | |
| 1717 | /* so we now have a remote node to connect */ |
| 1718 | if (!i) |
| 1719 | soc_of_bind(ici, epn, ren->parent); |
| 1720 | |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 1721 | of_node_put(ren); |
| 1722 | |
| 1723 | if (i) { |
| 1724 | dev_err(dev, "multiple subdevices aren't supported yet!\n"); |
| 1725 | break; |
| 1726 | } |
| 1727 | } |
Philipp Zabel | f033c0b | 2014-12-01 13:32:32 +0100 | [diff] [blame] | 1728 | |
| 1729 | of_node_put(epn); |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 1730 | } |
| 1731 | |
| 1732 | #else |
| 1733 | static inline void scan_of_host(struct soc_camera_host *ici) { } |
| 1734 | #endif |
| 1735 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1736 | /* Called during host-driver probe */ |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1737 | static int soc_camera_probe(struct soc_camera_host *ici, |
| 1738 | struct soc_camera_device *icd) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1739 | { |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1740 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
| 1741 | struct soc_camera_host_desc *shd = &sdesc->host_desc; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1742 | struct device *control = NULL; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1743 | int ret; |
| 1744 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1745 | dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev)); |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 1746 | |
Hans Verkuil | ee02da6 | 2011-09-06 12:36:39 -0300 | [diff] [blame] | 1747 | /* |
| 1748 | * Currently the subdev with the largest number of controls (13) is |
| 1749 | * ov6550. So let's pick 16 as a hint for the control handler. Note |
| 1750 | * that this is a hint only: too large and you waste some memory, too |
| 1751 | * small and there is a (very) small performance hit when looking up |
| 1752 | * controls in the internal hash. |
| 1753 | */ |
| 1754 | ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16); |
| 1755 | if (ret < 0) |
| 1756 | return ret; |
| 1757 | |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1758 | /* Must have icd->vdev before registering the device */ |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1759 | ret = video_dev_create(icd); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1760 | if (ret < 0) |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1761 | goto evdc; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1762 | |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1763 | /* |
| 1764 | * ..._video_start() will create a device node, video_register_device() |
| 1765 | * itself is protected against concurrent open() calls, but we also have |
| 1766 | * to protect our data also during client probing. |
| 1767 | */ |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1768 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1769 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1770 | if (shd->board_info) { |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1771 | ret = soc_camera_i2c_init(icd, sdesc); |
| 1772 | if (ret < 0 && ret != -EPROBE_DEFER) |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1773 | goto eadd; |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1774 | } else if (!shd->add_device || !shd->del_device) { |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1775 | ret = -EINVAL; |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1776 | goto eadd; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1777 | } else { |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 1778 | ret = soc_camera_clock_start(ici); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1779 | if (ret < 0) |
| 1780 | goto eadd; |
| 1781 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1782 | if (shd->module_name) |
| 1783 | ret = request_module(shd->module_name); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1784 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1785 | ret = shd->add_device(icd); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1786 | if (ret < 0) |
| 1787 | goto eadddev; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1788 | |
Guennadi Liakhovetski | 96c7539 | 2009-08-25 11:53:23 -0300 | [diff] [blame] | 1789 | /* |
| 1790 | * FIXME: this is racy, have to use driver-binding notification, |
| 1791 | * when it is available |
| 1792 | */ |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1793 | control = to_soc_camera_control(icd); |
Guennadi Liakhovetski | 08590b9 | 2009-08-25 11:46:54 -0300 | [diff] [blame] | 1794 | if (!control || !control->driver || !dev_get_drvdata(control) || |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1795 | !try_module_get(control->driver->owner)) { |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1796 | shd->del_device(icd); |
Guennadi Liakhovetski | 7ae77ee | 2011-09-28 09:25:28 -0300 | [diff] [blame] | 1797 | ret = -ENODEV; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1798 | goto enodrv; |
| 1799 | } |
Guennadi Liakhovetski | 025c18a | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1800 | } |
| 1801 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1802 | mutex_lock(&ici->host_lock); |
| 1803 | ret = soc_camera_probe_finish(icd); |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 1804 | mutex_unlock(&ici->host_lock); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1805 | if (ret < 0) |
| 1806 | goto efinish; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1807 | |
| 1808 | return 0; |
| 1809 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1810 | efinish: |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1811 | if (shd->board_info) { |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1812 | soc_camera_i2c_free(icd); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1813 | } else { |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1814 | shd->del_device(icd); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1815 | module_put(control->driver->owner); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1816 | enodrv: |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1817 | eadddev: |
Laurent Pinchart | 3781760 | 2015-03-09 03:39:34 -0300 | [diff] [blame] | 1818 | soc_camera_clock_stop(ici); |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1819 | } |
| 1820 | eadd: |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1821 | if (icd->vdev) { |
| 1822 | video_device_release(icd->vdev); |
| 1823 | icd->vdev = NULL; |
| 1824 | } |
Guennadi Liakhovetski | 9aea470 | 2012-12-21 13:01:55 -0300 | [diff] [blame] | 1825 | evdc: |
Hans Verkuil | ee02da6 | 2011-09-06 12:36:39 -0300 | [diff] [blame] | 1826 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1827 | return ret; |
| 1828 | } |
| 1829 | |
Guennadi Liakhovetski | 5d28d52 | 2009-12-11 11:15:05 -0300 | [diff] [blame] | 1830 | /* |
| 1831 | * This is called on device_unregister, which only means we have to disconnect |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1832 | * from the host, but not remove ourselves from the device list. With |
| 1833 | * asynchronous client probing this can also be called without |
| 1834 | * soc_camera_probe_finish() having run. Careful with clean up. |
Guennadi Liakhovetski | 5d28d52 | 2009-12-11 11:15:05 -0300 | [diff] [blame] | 1835 | */ |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 1836 | static int soc_camera_remove(struct soc_camera_device *icd) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1837 | { |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1838 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1839 | struct video_device *vdev = icd->vdev; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1840 | |
Hans Verkuil | ee02da6 | 2011-09-06 12:36:39 -0300 | [diff] [blame] | 1841 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1842 | if (vdev) { |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1843 | video_unregister_device(vdev); |
| 1844 | icd->vdev = NULL; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 1845 | } |
| 1846 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1847 | if (sdesc->host_desc.board_info) { |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1848 | soc_camera_i2c_free(icd); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1849 | } else { |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1850 | struct device *dev = to_soc_camera_control(icd); |
| 1851 | struct device_driver *drv = dev ? dev->driver : NULL; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1852 | if (drv) { |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 1853 | sdesc->host_desc.del_device(icd); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1854 | module_put(drv->owner); |
| 1855 | } |
| 1856 | } |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1857 | |
| 1858 | if (icd->num_user_formats) |
| 1859 | soc_camera_free_user_formats(icd); |
| 1860 | |
| 1861 | if (icd->clk) { |
| 1862 | /* For the synchronous case */ |
| 1863 | v4l2_clk_unregister(icd->clk); |
| 1864 | icd->clk = NULL; |
| 1865 | } |
| 1866 | |
| 1867 | if (icd->sasc) |
| 1868 | platform_device_unregister(icd->sasc->pdev); |
Guennadi Liakhovetski | 025c18a | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1869 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1870 | return 0; |
| 1871 | } |
| 1872 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1873 | static int default_cropcap(struct soc_camera_device *icd, |
| 1874 | struct v4l2_cropcap *a) |
| 1875 | { |
| 1876 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1877 | return v4l2_subdev_call(sd, video, cropcap, a); |
| 1878 | } |
| 1879 | |
| 1880 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) |
| 1881 | { |
| 1882 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1883 | return v4l2_subdev_call(sd, video, g_crop, a); |
| 1884 | } |
| 1885 | |
Hans Verkuil | 4f99659 | 2012-09-05 05:10:48 -0300 | [diff] [blame] | 1886 | static int default_s_crop(struct soc_camera_device *icd, const struct v4l2_crop *a) |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1887 | { |
| 1888 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1889 | return v4l2_subdev_call(sd, video, s_crop, a); |
| 1890 | } |
| 1891 | |
Janusz Krzysztofik | 06e1782 | 2010-09-10 22:26:16 -0300 | [diff] [blame] | 1892 | static int default_g_parm(struct soc_camera_device *icd, |
| 1893 | struct v4l2_streamparm *parm) |
| 1894 | { |
| 1895 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1896 | return v4l2_subdev_call(sd, video, g_parm, parm); |
| 1897 | } |
| 1898 | |
| 1899 | static int default_s_parm(struct soc_camera_device *icd, |
| 1900 | struct v4l2_streamparm *parm) |
| 1901 | { |
| 1902 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1903 | return v4l2_subdev_call(sd, video, s_parm, parm); |
| 1904 | } |
| 1905 | |
Guennadi Liakhovetski | ad3537b | 2012-05-08 13:00:51 -0300 | [diff] [blame] | 1906 | static int default_enum_framesizes(struct soc_camera_device *icd, |
| 1907 | struct v4l2_frmsizeenum *fsize) |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 1908 | { |
| 1909 | int ret; |
| 1910 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1911 | const struct soc_camera_format_xlate *xlate; |
Hans Verkuil | 17bef88 | 2015-03-04 01:48:00 -0800 | [diff] [blame] | 1912 | struct v4l2_subdev_frame_size_enum fse = { |
| 1913 | .index = fsize->index, |
| 1914 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| 1915 | }; |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 1916 | |
Hans Verkuil | 17bef88 | 2015-03-04 01:48:00 -0800 | [diff] [blame] | 1917 | xlate = soc_camera_xlate_by_fourcc(icd, fsize->pixel_format); |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 1918 | if (!xlate) |
| 1919 | return -EINVAL; |
Hans Verkuil | 17bef88 | 2015-03-04 01:48:00 -0800 | [diff] [blame] | 1920 | fse.code = xlate->code; |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 1921 | |
Hans Verkuil | 17bef88 | 2015-03-04 01:48:00 -0800 | [diff] [blame] | 1922 | ret = v4l2_subdev_call(sd, pad, enum_frame_size, NULL, &fse); |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 1923 | if (ret < 0) |
| 1924 | return ret; |
| 1925 | |
Hans Verkuil | 17bef88 | 2015-03-04 01:48:00 -0800 | [diff] [blame] | 1926 | if (fse.min_width == fse.max_width && |
| 1927 | fse.min_height == fse.max_height) { |
| 1928 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
| 1929 | fsize->discrete.width = fse.min_width; |
| 1930 | fsize->discrete.height = fse.min_height; |
| 1931 | return 0; |
| 1932 | } |
| 1933 | fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; |
| 1934 | fsize->stepwise.min_width = fse.min_width; |
| 1935 | fsize->stepwise.max_width = fse.max_width; |
| 1936 | fsize->stepwise.min_height = fse.min_height; |
| 1937 | fsize->stepwise.max_height = fse.max_height; |
| 1938 | fsize->stepwise.step_width = 1; |
| 1939 | fsize->stepwise.step_height = 1; |
Qing Xu | ed5b65d | 2011-01-20 05:19:40 -0300 | [diff] [blame] | 1940 | return 0; |
| 1941 | } |
| 1942 | |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 1943 | int soc_camera_host_register(struct soc_camera_host *ici) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1944 | { |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1945 | struct soc_camera_host *ix; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1946 | int ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1947 | |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 1948 | if (!ici || !ici->ops || |
| 1949 | !ici->ops->try_fmt || |
| 1950 | !ici->ops->set_fmt || |
| 1951 | !ici->ops->set_bus_param || |
| 1952 | !ici->ops->querycap || |
Guennadi Liakhovetski | 592c2ab | 2011-01-29 12:44:51 -0300 | [diff] [blame] | 1953 | ((!ici->ops->init_videobuf || |
| 1954 | !ici->ops->reqbufs) && |
| 1955 | !ici->ops->init_videobuf2) || |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1956 | !ici->ops->poll || |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1957 | !ici->v4l2_dev.dev) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1958 | return -EINVAL; |
| 1959 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1960 | if (!ici->ops->set_crop) |
| 1961 | ici->ops->set_crop = default_s_crop; |
| 1962 | if (!ici->ops->get_crop) |
| 1963 | ici->ops->get_crop = default_g_crop; |
| 1964 | if (!ici->ops->cropcap) |
| 1965 | ici->ops->cropcap = default_cropcap; |
Janusz Krzysztofik | 06e1782 | 2010-09-10 22:26:16 -0300 | [diff] [blame] | 1966 | if (!ici->ops->set_parm) |
| 1967 | ici->ops->set_parm = default_s_parm; |
| 1968 | if (!ici->ops->get_parm) |
| 1969 | ici->ops->get_parm = default_g_parm; |
Guennadi Liakhovetski | ad3537b | 2012-05-08 13:00:51 -0300 | [diff] [blame] | 1970 | if (!ici->ops->enum_framesizes) |
| 1971 | ici->ops->enum_framesizes = default_enum_framesizes; |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 1972 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1973 | mutex_lock(&list_lock); |
| 1974 | list_for_each_entry(ix, &hosts, list) { |
| 1975 | if (ix->nr == ici->nr) { |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1976 | ret = -EBUSY; |
| 1977 | goto edevreg; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1978 | } |
| 1979 | } |
| 1980 | |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 1981 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
| 1982 | if (ret < 0) |
| 1983 | goto edevreg; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1984 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 1985 | list_add_tail(&ici->list, &hosts); |
| 1986 | mutex_unlock(&list_lock); |
| 1987 | |
Guennadi Liakhovetski | 2f9a0c8 | 2012-04-18 06:43:09 -0300 | [diff] [blame] | 1988 | mutex_init(&ici->host_lock); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1989 | mutex_init(&ici->clk_lock); |
| 1990 | |
Ben Dooks | 1ddc6a6 | 2014-07-05 19:26:23 -0300 | [diff] [blame] | 1991 | if (ici->v4l2_dev.dev->of_node) |
| 1992 | scan_of_host(ici); |
| 1993 | else if (ici->asd_sizes) |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 1994 | /* |
| 1995 | * No OF, host with a list of subdevices. Don't try to mix |
| 1996 | * modes by initialising some groups statically and some |
| 1997 | * dynamically! |
| 1998 | */ |
| 1999 | scan_async_host(ici); |
| 2000 | else |
| 2001 | /* Legacy: static platform devices from board data */ |
| 2002 | scan_add_host(ici); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2003 | |
| 2004 | return 0; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2005 | |
| 2006 | edevreg: |
| 2007 | mutex_unlock(&list_lock); |
| 2008 | return ret; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2009 | } |
| 2010 | EXPORT_SYMBOL(soc_camera_host_register); |
| 2011 | |
| 2012 | /* Unregister all clients! */ |
| 2013 | void soc_camera_host_unregister(struct soc_camera_host *ici) |
| 2014 | { |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2015 | struct soc_camera_device *icd, *tmp; |
| 2016 | struct soc_camera_async_client *sasc; |
| 2017 | LIST_HEAD(notifiers); |
| 2018 | |
| 2019 | mutex_lock(&list_lock); |
| 2020 | list_del(&ici->list); |
| 2021 | list_for_each_entry(icd, &devices, list) |
| 2022 | if (icd->iface == ici->nr && icd->sasc) { |
| 2023 | /* as long as we hold the device, sasc won't be freed */ |
| 2024 | get_device(icd->pdev); |
| 2025 | list_add(&icd->sasc->list, ¬ifiers); |
| 2026 | } |
| 2027 | mutex_unlock(&list_lock); |
| 2028 | |
| 2029 | list_for_each_entry(sasc, ¬ifiers, list) { |
| 2030 | /* Must call unlocked to avoid AB-BA dead-lock */ |
| 2031 | v4l2_async_notifier_unregister(&sasc->notifier); |
| 2032 | put_device(&sasc->pdev->dev); |
| 2033 | } |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2034 | |
| 2035 | mutex_lock(&list_lock); |
| 2036 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2037 | list_for_each_entry_safe(icd, tmp, &devices, list) |
| 2038 | if (icd->iface == ici->nr) |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 2039 | soc_camera_remove(icd); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2040 | |
| 2041 | mutex_unlock(&list_lock); |
| 2042 | |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2043 | v4l2_device_unregister(&ici->v4l2_dev); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2044 | } |
| 2045 | EXPORT_SYMBOL(soc_camera_host_unregister); |
| 2046 | |
| 2047 | /* Image capture device */ |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2048 | static int soc_camera_device_register(struct soc_camera_device *icd) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2049 | { |
| 2050 | struct soc_camera_device *ix; |
| 2051 | int num = -1, i; |
| 2052 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2053 | mutex_lock(&list_lock); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2054 | for (i = 0; i < 256 && num < 0; i++) { |
| 2055 | num = i; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2056 | /* Check if this index is available on this interface */ |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2057 | list_for_each_entry(ix, &devices, list) { |
| 2058 | if (ix->iface == icd->iface && ix->devnum == i) { |
| 2059 | num = -1; |
| 2060 | break; |
| 2061 | } |
| 2062 | } |
| 2063 | } |
| 2064 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2065 | if (num < 0) { |
Guennadi Liakhovetski | 5d28d52 | 2009-12-11 11:15:05 -0300 | [diff] [blame] | 2066 | /* |
| 2067 | * ok, we have 256 cameras on this host... |
| 2068 | * man, stay reasonable... |
| 2069 | */ |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2070 | mutex_unlock(&list_lock); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2071 | return -ENOMEM; |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2072 | } |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2073 | |
Guennadi Liakhovetski | 64ff9ba | 2009-11-09 16:12:37 -0300 | [diff] [blame] | 2074 | icd->devnum = num; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 2075 | icd->use_count = 0; |
| 2076 | icd->host_priv = NULL; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2077 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2078 | /* |
| 2079 | * Dynamically allocated devices set the bit earlier, but it doesn't hurt setting |
| 2080 | * it again |
| 2081 | */ |
| 2082 | i = to_platform_device(icd->pdev)->id; |
| 2083 | if (i < 0) |
| 2084 | /* One static (legacy) soc-camera platform device */ |
| 2085 | i = 0; |
| 2086 | if (i >= MAP_MAX_NUM) { |
| 2087 | mutex_unlock(&list_lock); |
| 2088 | return -EBUSY; |
| 2089 | } |
| 2090 | set_bit(i, device_map); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2091 | list_add_tail(&icd->list, &devices); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2092 | mutex_unlock(&list_lock); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2093 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2094 | return 0; |
| 2095 | } |
| 2096 | |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2097 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
| 2098 | .vidioc_querycap = soc_camera_querycap, |
Guennadi Liakhovetski | 7ae77ee | 2011-09-28 09:25:28 -0300 | [diff] [blame] | 2099 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2100 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2101 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, |
Guennadi Liakhovetski | 7ae77ee | 2011-09-28 09:25:28 -0300 | [diff] [blame] | 2102 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2103 | .vidioc_enum_input = soc_camera_enum_input, |
| 2104 | .vidioc_g_input = soc_camera_g_input, |
| 2105 | .vidioc_s_input = soc_camera_s_input, |
| 2106 | .vidioc_s_std = soc_camera_s_std, |
Guennadi Liakhovetski | 2f0babb | 2011-09-09 13:39:20 -0300 | [diff] [blame] | 2107 | .vidioc_g_std = soc_camera_g_std, |
Guennadi Liakhovetski | ad3537b | 2012-05-08 13:00:51 -0300 | [diff] [blame] | 2108 | .vidioc_enum_framesizes = soc_camera_enum_framesizes, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2109 | .vidioc_reqbufs = soc_camera_reqbufs, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2110 | .vidioc_querybuf = soc_camera_querybuf, |
| 2111 | .vidioc_qbuf = soc_camera_qbuf, |
| 2112 | .vidioc_dqbuf = soc_camera_dqbuf, |
Guennadi Liakhovetski | 7ae77ee | 2011-09-28 09:25:28 -0300 | [diff] [blame] | 2113 | .vidioc_create_bufs = soc_camera_create_bufs, |
| 2114 | .vidioc_prepare_buf = soc_camera_prepare_buf, |
Kazunori Kobayashi | c710f591 | 2014-09-11 03:09:38 -0300 | [diff] [blame] | 2115 | .vidioc_expbuf = soc_camera_expbuf, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2116 | .vidioc_streamon = soc_camera_streamon, |
| 2117 | .vidioc_streamoff = soc_camera_streamoff, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2118 | .vidioc_cropcap = soc_camera_cropcap, |
| 2119 | .vidioc_g_crop = soc_camera_g_crop, |
| 2120 | .vidioc_s_crop = soc_camera_s_crop, |
Guennadi Liakhovetski | 3bfb410 | 2012-06-22 13:40:08 -0300 | [diff] [blame] | 2121 | .vidioc_g_selection = soc_camera_g_selection, |
| 2122 | .vidioc_s_selection = soc_camera_s_selection, |
Guennadi Liakhovetski | c9f6ef6 | 2010-02-09 18:00:30 +0100 | [diff] [blame] | 2123 | .vidioc_g_parm = soc_camera_g_parm, |
| 2124 | .vidioc_s_parm = soc_camera_s_parm, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2125 | }; |
| 2126 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2127 | static int video_dev_create(struct soc_camera_device *icd) |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2128 | { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 2129 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2130 | struct video_device *vdev = video_device_alloc(); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2131 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2132 | if (!vdev) |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2133 | return -ENOMEM; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2134 | |
| 2135 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 2136 | |
Hans Verkuil | 14381c2 | 2013-06-10 09:27:41 -0300 | [diff] [blame] | 2137 | vdev->v4l2_dev = &ici->v4l2_dev; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2138 | vdev->fops = &soc_camera_fops; |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 2139 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2140 | vdev->release = video_device_release; |
Hans Verkuil | ee02da6 | 2011-09-06 12:36:39 -0300 | [diff] [blame] | 2141 | vdev->ctrl_handler = &icd->ctrl_handler; |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 2142 | vdev->lock = &ici->host_lock; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2143 | |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2144 | icd->vdev = vdev; |
| 2145 | |
| 2146 | return 0; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2147 | } |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2148 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2149 | /* |
Guennadi Liakhovetski | dd669e9 | 2012-12-24 09:31:33 -0300 | [diff] [blame] | 2150 | * Called from soc_camera_probe() above with .host_lock held |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2151 | */ |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2152 | static int soc_camera_video_start(struct soc_camera_device *icd) |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2153 | { |
Mauro Carvalho Chehab | d364ee4 | 2011-06-01 15:03:56 -0300 | [diff] [blame] | 2154 | const struct device_type *type = icd->vdev->dev.type; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2155 | int ret; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2156 | |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 2157 | if (!icd->parent) |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2158 | return -ENODEV; |
| 2159 | |
Hans Verkuil | 14381c2 | 2013-06-10 09:27:41 -0300 | [diff] [blame] | 2160 | video_set_drvdata(icd->vdev, icd); |
Hans Verkuil | f6cc51a | 2014-02-17 08:44:14 -0300 | [diff] [blame] | 2161 | if (icd->vdev->tvnorms == 0) { |
| 2162 | /* disable the STD API if there are no tvnorms defined */ |
| 2163 | v4l2_disable_ioctl(icd->vdev, VIDIOC_G_STD); |
| 2164 | v4l2_disable_ioctl(icd->vdev, VIDIOC_S_STD); |
| 2165 | v4l2_disable_ioctl(icd->vdev, VIDIOC_ENUMSTD); |
| 2166 | } |
Laurent Pinchart | 46b2109 | 2009-12-10 11:51:38 -0200 | [diff] [blame] | 2167 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2168 | if (ret < 0) { |
Guennadi Liakhovetski | 7dfff95 | 2011-07-15 20:03:38 -0300 | [diff] [blame] | 2169 | dev_err(icd->pdev, "video_register_device failed: %d\n", ret); |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2170 | return ret; |
| 2171 | } |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2172 | |
Mauro Carvalho Chehab | 4f9fb5e | 2010-05-18 00:46:09 -0300 | [diff] [blame] | 2173 | /* Restore device type, possibly set by the subdevice driver */ |
| 2174 | icd->vdev->dev.type = type; |
| 2175 | |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2176 | return 0; |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2177 | } |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2178 | |
Greg Kroah-Hartman | 4c62e97 | 2012-12-21 13:17:53 -0800 | [diff] [blame] | 2179 | static int soc_camera_pdrv_probe(struct platform_device *pdev) |
Guennadi Liakhovetski | c41deba | 2009-08-25 11:06:21 -0300 | [diff] [blame] | 2180 | { |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 2181 | struct soc_camera_desc *sdesc = pdev->dev.platform_data; |
| 2182 | struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2183 | struct soc_camera_device *icd; |
Guennadi Liakhovetski | 8a97d4c | 2013-01-03 11:21:02 -0300 | [diff] [blame] | 2184 | int ret; |
Guennadi Liakhovetski | c41deba | 2009-08-25 11:06:21 -0300 | [diff] [blame] | 2185 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 2186 | if (!sdesc) |
Guennadi Liakhovetski | c41deba | 2009-08-25 11:06:21 -0300 | [diff] [blame] | 2187 | return -EINVAL; |
| 2188 | |
Sachin Kamat | 02249369 | 2012-09-05 08:25:26 -0300 | [diff] [blame] | 2189 | icd = devm_kzalloc(&pdev->dev, sizeof(*icd), GFP_KERNEL); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2190 | if (!icd) |
| 2191 | return -ENOMEM; |
Guennadi Liakhovetski | c41deba | 2009-08-25 11:06:21 -0300 | [diff] [blame] | 2192 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2193 | /* |
| 2194 | * In the asynchronous case ssdd->num_regulators == 0 yet, so, the below |
Guennadi Liakhovetski | 2327242 | 2013-07-30 08:01:55 -0300 | [diff] [blame] | 2195 | * regulator allocation is a dummy. They are actually requested by the |
| 2196 | * subdevice driver, using soc_camera_power_init(). Also note, that in |
| 2197 | * that case regulators are attached to the I2C device and not to the |
| 2198 | * camera platform device. |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2199 | */ |
Guennadi Liakhovetski | d3f884a | 2013-04-18 18:35:28 -0300 | [diff] [blame] | 2200 | ret = devm_regulator_bulk_get(&pdev->dev, ssdd->sd_pdata.num_regulators, |
| 2201 | ssdd->sd_pdata.regulators); |
Guennadi Liakhovetski | 8a97d4c | 2013-01-03 11:21:02 -0300 | [diff] [blame] | 2202 | if (ret < 0) |
| 2203 | return ret; |
| 2204 | |
Guennadi Liakhovetski | 25a3481 | 2012-12-21 08:11:48 -0300 | [diff] [blame] | 2205 | icd->iface = sdesc->host_desc.bus_id; |
| 2206 | icd->sdesc = sdesc; |
Guennadi Liakhovetski | 979ea1d | 2009-08-25 11:43:33 -0300 | [diff] [blame] | 2207 | icd->pdev = &pdev->dev; |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2208 | platform_set_drvdata(pdev, icd); |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2209 | |
Guennadi Liakhovetski | 6a6c878 | 2009-08-25 11:50:46 -0300 | [diff] [blame] | 2210 | icd->user_width = DEFAULT_WIDTH; |
| 2211 | icd->user_height = DEFAULT_HEIGHT; |
| 2212 | |
Sachin Kamat | 02249369 | 2012-09-05 08:25:26 -0300 | [diff] [blame] | 2213 | return soc_camera_device_register(icd); |
Guennadi Liakhovetski | c41deba | 2009-08-25 11:06:21 -0300 | [diff] [blame] | 2214 | } |
| 2215 | |
Guennadi Liakhovetski | 5d28d52 | 2009-12-11 11:15:05 -0300 | [diff] [blame] | 2216 | /* |
| 2217 | * Only called on rmmod for each platform device, since they are not |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2218 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
Guennadi Liakhovetski | 5d28d52 | 2009-12-11 11:15:05 -0300 | [diff] [blame] | 2219 | * been unloaded already |
| 2220 | */ |
Greg Kroah-Hartman | 4c62e97 | 2012-12-21 13:17:53 -0800 | [diff] [blame] | 2221 | static int soc_camera_pdrv_remove(struct platform_device *pdev) |
Guennadi Liakhovetski | c41deba | 2009-08-25 11:06:21 -0300 | [diff] [blame] | 2222 | { |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2223 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2224 | int i; |
Guennadi Liakhovetski | c41deba | 2009-08-25 11:06:21 -0300 | [diff] [blame] | 2225 | |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2226 | if (!icd) |
| 2227 | return -EINVAL; |
| 2228 | |
Guennadi Liakhovetski | e09da11 | 2012-12-26 12:44:11 -0300 | [diff] [blame] | 2229 | i = pdev->id; |
| 2230 | if (i < 0) |
| 2231 | i = 0; |
| 2232 | |
| 2233 | /* |
| 2234 | * In synchronous mode with static platform devices this is called in a |
| 2235 | * loop from drivers/base/dd.c::driver_detach(), no parallel execution, |
| 2236 | * no need to lock. In asynchronous case the caller - |
| 2237 | * soc_camera_host_unregister() - already holds the lock |
| 2238 | */ |
| 2239 | if (test_bit(i, device_map)) { |
| 2240 | clear_bit(i, device_map); |
| 2241 | list_del(&icd->list); |
| 2242 | } |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2243 | |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 2244 | return 0; |
| 2245 | } |
| 2246 | |
| 2247 | static struct platform_driver __refdata soc_camera_pdrv = { |
Laurent Pinchart | 1858c99 | 2012-07-18 10:53:56 -0300 | [diff] [blame] | 2248 | .probe = soc_camera_pdrv_probe, |
Greg Kroah-Hartman | 4c62e97 | 2012-12-21 13:17:53 -0800 | [diff] [blame] | 2249 | .remove = soc_camera_pdrv_remove, |
Guennadi Liakhovetski | 40e2e09 | 2009-08-25 11:28:22 -0300 | [diff] [blame] | 2250 | .driver = { |
| 2251 | .name = "soc-camera-pdrv", |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 2252 | }, |
| 2253 | }; |
| 2254 | |
Sachin Kamat | ec0341b | 2012-09-05 08:25:27 -0300 | [diff] [blame] | 2255 | module_platform_driver(soc_camera_pdrv); |
Guennadi Liakhovetski | e55222e | 2008-04-22 14:42:03 -0300 | [diff] [blame] | 2256 | |
| 2257 | MODULE_DESCRIPTION("Image capture bus driver"); |
| 2258 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); |
| 2259 | MODULE_LICENSE("GPL"); |
Guennadi Liakhovetski | 0fd327b | 2009-05-07 13:25:32 -0300 | [diff] [blame] | 2260 | MODULE_ALIAS("platform:soc-camera-pdrv"); |