1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Driver for Renesas R-Car VIN 4 * 5 * Copyright (C) 2016 Renesas Electronics Corp. 6 * Copyright (C) 2011-2013 Renesas Solutions Corp. 7 * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com> 8 * Copyright (C) 2008 Magnus Damm 9 * 10 * Based on the soc-camera rcar_vin driver 11 */ 12 13 #ifndef __RCAR_VIN__ 14 #define __RCAR_VIN__ 15 16 #include <linux/kref.h> 17 18 #include <media/v4l2-async.h> 19 #include <media/v4l2-ctrls.h> 20 #include <media/v4l2-dev.h> 21 #include <media/v4l2-device.h> 22 #include <media/v4l2-fwnode.h> 23 #include <media/videobuf2-v4l2.h> 24 25 /* Number of HW buffers */ 26 #define HW_BUFFER_NUM 3 27 28 /* Address alignment mask for HW buffers */ 29 #define HW_BUFFER_MASK 0x7f 30 31 /* Max number on VIN instances that can be in a system */ 32 #define RCAR_VIN_NUM 32 33 34 struct rvin_group; 35 36 enum model_id { 37 RCAR_H1, 38 RCAR_M1, 39 RCAR_GEN2, 40 RCAR_GEN3, 41 }; 42 43 enum rvin_csi_id { 44 RVIN_CSI20, 45 RVIN_CSI21, 46 RVIN_CSI40, 47 RVIN_CSI41, 48 RVIN_CSI_MAX, 49 }; 50 51 enum rvin_isp_id { 52 RVIN_ISP0, 53 RVIN_ISP1, 54 RVIN_ISP2, 55 RVIN_ISP4, 56 RVIN_ISP_MAX, 57 }; 58 59 #define RVIN_REMOTES_MAX \ 60 (((unsigned int)RVIN_CSI_MAX) > ((unsigned int)RVIN_ISP_MAX) ? \ 61 RVIN_CSI_MAX : RVIN_ISP_MAX) 62 63 /** 64 * enum rvin_dma_state - DMA states 65 * @STOPPED: No operation in progress 66 * @STARTING: Capture starting up 67 * @RUNNING: Operation in progress have buffers 68 * @STOPPING: Stopping operation 69 * @SUSPENDED: Capture is suspended 70 */ 71 enum rvin_dma_state { 72 STOPPED = 0, 73 STARTING, 74 RUNNING, 75 STOPPING, 76 SUSPENDED, 77 }; 78 79 /** 80 * enum rvin_buffer_type 81 * 82 * Describes how a buffer is given to the hardware. To be able 83 * to capture SEQ_TB/BT it's needed to capture to the same vb2 84 * buffer twice so the type of buffer needs to be kept. 85 * 86 * @FULL: One capture fills the whole vb2 buffer 87 * @HALF_TOP: One capture fills the top half of the vb2 buffer 88 * @HALF_BOTTOM: One capture fills the bottom half of the vb2 buffer 89 */ 90 enum rvin_buffer_type { 91 FULL, 92 HALF_TOP, 93 HALF_BOTTOM, 94 }; 95 96 /** 97 * struct rvin_video_format - Data format stored in memory 98 * @fourcc: Pixelformat 99 * @bpp: Bytes per pixel 100 */ 101 struct rvin_video_format { 102 u32 fourcc; 103 u8 bpp; 104 }; 105 106 /** 107 * struct rvin_parallel_entity - Parallel video input endpoint descriptor 108 * @asd: sub-device descriptor for async framework 109 * @subdev: subdevice matched using async framework 110 * @mbus_type: media bus type 111 * @bus: media bus parallel configuration 112 * @source_pad: source pad of remote subdevice 113 * @sink_pad: sink pad of remote subdevice 114 * 115 */ 116 struct rvin_parallel_entity { 117 struct v4l2_async_subdev *asd; 118 struct v4l2_subdev *subdev; 119 120 enum v4l2_mbus_type mbus_type; 121 struct v4l2_mbus_config_parallel bus; 122 123 unsigned int source_pad; 124 unsigned int sink_pad; 125 }; 126 127 /** 128 * struct rvin_group_route - describes a route from a channel of a 129 * CSI-2 receiver to a VIN 130 * 131 * @master: VIN group master ID. 132 * @csi: CSI-2 receiver ID. 133 * @chsel: CHSEL register values that connects VIN group to CSI-2. 134 * 135 * .. note:: 136 * Each R-Car CSI-2 receiver has four output channels facing the VIN 137 * devices, each channel can carry one CSI-2 Virtual Channel (VC). 138 * There is no correlation between channel number and CSI-2 VC. It's 139 * up to the CSI-2 receiver driver to configure which VC is output 140 * on which channel, the VIN devices only care about output channels. 141 */ 142 struct rvin_group_route { 143 unsigned int master; 144 enum rvin_csi_id csi; 145 unsigned int chsel; 146 }; 147 148 /** 149 * struct rvin_info - Information about the particular VIN implementation 150 * @model: VIN model 151 * @use_mc: use media controller instead of controlling subdevice 152 * @use_isp: the VIN is connected to the ISP and not to the CSI-2 153 * @nv12: support outputing NV12 pixel format 154 * @max_width: max input width the VIN supports 155 * @max_height: max input height the VIN supports 156 * @routes: list of possible routes from the CSI-2 recivers to 157 * all VINs. The list mush be NULL terminated. 158 */ 159 struct rvin_info { 160 enum model_id model; 161 bool use_mc; 162 bool use_isp; 163 bool nv12; 164 165 unsigned int max_width; 166 unsigned int max_height; 167 const struct rvin_group_route *routes; 168 }; 169 170 /** 171 * struct rvin_dev - Renesas VIN device structure 172 * @dev: (OF) device 173 * @base: device I/O register space remapped to virtual memory 174 * @info: info about VIN instance 175 * 176 * @vdev: V4L2 video device associated with VIN 177 * @v4l2_dev: V4L2 device 178 * @ctrl_handler: V4L2 control handler 179 * @notifier: V4L2 asynchronous subdevs notifier 180 * 181 * @parallel: parallel input subdevice descriptor 182 * 183 * @group: Gen3 CSI group 184 * @id: Gen3 group id for this VIN 185 * @pad: media pad for the video device entity 186 * 187 * @lock: protects @queue 188 * @queue: vb2 buffers queue 189 * @scratch: cpu address for scratch buffer 190 * @scratch_phys: physical address of the scratch buffer 191 * 192 * @qlock: protects @buf_hw, @buf_list, @sequence and @state 193 * @buf_hw: Keeps track of buffers given to HW slot 194 * @buf_list: list of queued buffers 195 * @sequence: V4L2 buffers sequence number 196 * @state: keeps track of operation state 197 * 198 * @is_csi: flag to mark the VIN as using a CSI-2 subdevice 199 * @chsel: Cached value of the current CSI-2 channel selection 200 * 201 * @mbus_code: media bus format code 202 * @format: active V4L2 pixel format 203 * 204 * @crop: active cropping 205 * @compose: active composing 206 * @src_rect: active size of the video source 207 * @std: active video standard of the video source 208 * 209 * @alpha: Alpha component to fill in for supported pixel formats 210 */ 211 struct rvin_dev { 212 struct device *dev; 213 void __iomem *base; 214 const struct rvin_info *info; 215 216 struct video_device vdev; 217 struct v4l2_device v4l2_dev; 218 struct v4l2_ctrl_handler ctrl_handler; 219 struct v4l2_async_notifier notifier; 220 221 struct rvin_parallel_entity parallel; 222 223 struct rvin_group *group; 224 unsigned int id; 225 struct media_pad pad; 226 227 struct mutex lock; 228 struct vb2_queue queue; 229 void *scratch; 230 dma_addr_t scratch_phys; 231 232 spinlock_t qlock; 233 struct { 234 struct vb2_v4l2_buffer *buffer; 235 enum rvin_buffer_type type; 236 dma_addr_t phys; 237 } buf_hw[HW_BUFFER_NUM]; 238 struct list_head buf_list; 239 unsigned int sequence; 240 enum rvin_dma_state state; 241 242 bool is_csi; 243 unsigned int chsel; 244 245 u32 mbus_code; 246 struct v4l2_pix_format format; 247 248 struct v4l2_rect crop; 249 struct v4l2_rect compose; 250 struct v4l2_rect src_rect; 251 v4l2_std_id std; 252 253 unsigned int alpha; 254 }; 255 256 #define vin_to_source(vin) ((vin)->parallel.subdev) 257 258 /* Debug */ 259 #define vin_dbg(d, fmt, arg...) dev_dbg(d->dev, fmt, ##arg) 260 #define vin_info(d, fmt, arg...) dev_info(d->dev, fmt, ##arg) 261 #define vin_warn(d, fmt, arg...) dev_warn(d->dev, fmt, ##arg) 262 #define vin_err(d, fmt, arg...) dev_err(d->dev, fmt, ##arg) 263 264 /** 265 * struct rvin_group - VIN CSI2 group information 266 * @refcount: number of VIN instances using the group 267 * 268 * @mdev: media device which represents the group 269 * 270 * @lock: protects the count, notifier, vin and csi members 271 * @count: number of enabled VIN instances found in DT 272 * @notifier: group notifier for CSI-2 async subdevices 273 * @vin: VIN instances which are part of the group 274 * @link_setup: Callback to create all links for the media graph 275 * @remotes: array of pairs of fwnode and subdev pointers 276 * to all remote subdevices. 277 */ 278 struct rvin_group { 279 struct kref refcount; 280 281 struct media_device mdev; 282 283 struct mutex lock; 284 unsigned int count; 285 struct v4l2_async_notifier notifier; 286 struct rvin_dev *vin[RCAR_VIN_NUM]; 287 288 int (*link_setup)(struct rvin_dev *vin); 289 290 struct { 291 struct v4l2_async_subdev *asd; 292 struct v4l2_subdev *subdev; 293 } remotes[RVIN_REMOTES_MAX]; 294 }; 295 296 int rvin_dma_register(struct rvin_dev *vin, int irq); 297 void rvin_dma_unregister(struct rvin_dev *vin); 298 299 int rvin_v4l2_register(struct rvin_dev *vin); 300 void rvin_v4l2_unregister(struct rvin_dev *vin); 301 302 const struct rvin_video_format *rvin_format_from_pixel(struct rvin_dev *vin, 303 u32 pixelformat); 304 305 306 /* Cropping, composing and scaling */ 307 void rvin_crop_scale_comp(struct rvin_dev *vin); 308 309 int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel); 310 void rvin_set_alpha(struct rvin_dev *vin, unsigned int alpha); 311 312 int rvin_start_streaming(struct rvin_dev *vin); 313 void rvin_stop_streaming(struct rvin_dev *vin); 314 315 #endif 316