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/videobuf2-v4l2.h> 23 24 /* Number of HW buffers */ 25 #define HW_BUFFER_NUM 3 26 27 /* Address alignment mask for HW buffers */ 28 #define HW_BUFFER_MASK 0x7f 29 30 /* Max number on VIN instances that can be in a system */ 31 #define RCAR_VIN_NUM 8 32 33 struct rvin_group; 34 35 enum model_id { 36 RCAR_H1, 37 RCAR_M1, 38 RCAR_GEN2, 39 RCAR_GEN3, 40 }; 41 42 enum rvin_csi_id { 43 RVIN_CSI20, 44 RVIN_CSI21, 45 RVIN_CSI40, 46 RVIN_CSI41, 47 RVIN_CSI_MAX, 48 }; 49 50 /** 51 * STOPPED - No operation in progress 52 * STARTING - Capture starting up 53 * RUNNING - Operation in progress have buffers 54 * STOPPING - Stopping operation 55 */ 56 enum rvin_dma_state { 57 STOPPED = 0, 58 STARTING, 59 RUNNING, 60 STOPPING, 61 }; 62 63 /** 64 * struct rvin_video_format - Data format stored in memory 65 * @fourcc: Pixelformat 66 * @bpp: Bytes per pixel 67 */ 68 struct rvin_video_format { 69 u32 fourcc; 70 u8 bpp; 71 }; 72 73 /** 74 * struct rvin_parallel_entity - Parallel video input endpoint descriptor 75 * @asd: sub-device descriptor for async framework 76 * @subdev: subdevice matched using async framework 77 * @mbus_type: media bus type 78 * @mbus_flags: media bus configuration flags 79 * @source_pad: source pad of remote subdevice 80 * @sink_pad: sink pad of remote subdevice 81 * 82 */ 83 struct rvin_parallel_entity { 84 struct v4l2_async_subdev asd; 85 struct v4l2_subdev *subdev; 86 87 enum v4l2_mbus_type mbus_type; 88 unsigned int mbus_flags; 89 90 unsigned int source_pad; 91 unsigned int sink_pad; 92 }; 93 94 /** 95 * struct rvin_group_route - describes a route from a channel of a 96 * CSI-2 receiver to a VIN 97 * 98 * @csi: CSI-2 receiver ID. 99 * @channel: Output channel of the CSI-2 receiver. 100 * @vin: VIN ID. 101 * @mask: Bitmask of the different CHSEL register values that 102 * allow for a route from @csi + @chan to @vin. 103 * 104 * .. note:: 105 * Each R-Car CSI-2 receiver has four output channels facing the VIN 106 * devices, each channel can carry one CSI-2 Virtual Channel (VC). 107 * There is no correlation between channel number and CSI-2 VC. It's 108 * up to the CSI-2 receiver driver to configure which VC is output 109 * on which channel, the VIN devices only care about output channels. 110 * 111 * There are in some cases multiple CHSEL register settings which would 112 * allow for the same route from @csi + @channel to @vin. For example 113 * on R-Car H3 both the CHSEL values 0 and 3 allow for a route from 114 * CSI40/VC0 to VIN0. All possible CHSEL values for a route need to be 115 * recorded as a bitmask in @mask, in this example bit 0 and 3 should 116 * be set. 117 */ 118 struct rvin_group_route { 119 enum rvin_csi_id csi; 120 unsigned int channel; 121 unsigned int vin; 122 unsigned int mask; 123 }; 124 125 /** 126 * struct rvin_info - Information about the particular VIN implementation 127 * @model: VIN model 128 * @use_mc: use media controller instead of controlling subdevice 129 * @max_width: max input width the VIN supports 130 * @max_height: max input height the VIN supports 131 * @routes: list of possible routes from the CSI-2 recivers to 132 * all VINs. The list mush be NULL terminated. 133 */ 134 struct rvin_info { 135 enum model_id model; 136 bool use_mc; 137 138 unsigned int max_width; 139 unsigned int max_height; 140 const struct rvin_group_route *routes; 141 }; 142 143 /** 144 * struct rvin_dev - Renesas VIN device structure 145 * @dev: (OF) device 146 * @base: device I/O register space remapped to virtual memory 147 * @info: info about VIN instance 148 * 149 * @vdev: V4L2 video device associated with VIN 150 * @v4l2_dev: V4L2 device 151 * @ctrl_handler: V4L2 control handler 152 * @notifier: V4L2 asynchronous subdevs notifier 153 * 154 * @parallel: parallel input subdevice descriptor 155 * 156 * @group: Gen3 CSI group 157 * @id: Gen3 group id for this VIN 158 * @pad: media pad for the video device entity 159 * 160 * @lock: protects @queue 161 * @queue: vb2 buffers queue 162 * @scratch: cpu address for scratch buffer 163 * @scratch_phys: physical address of the scratch buffer 164 * 165 * @qlock: protects @queue_buf, @buf_list, @sequence 166 * @state 167 * @queue_buf: Keeps track of buffers given to HW slot 168 * @buf_list: list of queued buffers 169 * @sequence: V4L2 buffers sequence number 170 * @state: keeps track of operation state 171 * 172 * @is_csi: flag to mark the VIN as using a CSI-2 subdevice 173 * 174 * @mbus_code: media bus format code 175 * @format: active V4L2 pixel format 176 * 177 * @crop: active cropping 178 * @compose: active composing 179 * @source: active size of the video source 180 * @std: active video standard of the video source 181 */ 182 struct rvin_dev { 183 struct device *dev; 184 void __iomem *base; 185 const struct rvin_info *info; 186 187 struct video_device vdev; 188 struct v4l2_device v4l2_dev; 189 struct v4l2_ctrl_handler ctrl_handler; 190 struct v4l2_async_notifier notifier; 191 192 struct rvin_parallel_entity *parallel; 193 194 struct rvin_group *group; 195 unsigned int id; 196 struct media_pad pad; 197 198 struct mutex lock; 199 struct vb2_queue queue; 200 void *scratch; 201 dma_addr_t scratch_phys; 202 203 spinlock_t qlock; 204 struct vb2_v4l2_buffer *queue_buf[HW_BUFFER_NUM]; 205 struct list_head buf_list; 206 unsigned int sequence; 207 enum rvin_dma_state state; 208 209 bool is_csi; 210 211 u32 mbus_code; 212 struct v4l2_pix_format format; 213 214 struct v4l2_rect crop; 215 struct v4l2_rect compose; 216 struct v4l2_rect source; 217 v4l2_std_id std; 218 }; 219 220 #define vin_to_source(vin) ((vin)->parallel->subdev) 221 222 /* Debug */ 223 #define vin_dbg(d, fmt, arg...) dev_dbg(d->dev, fmt, ##arg) 224 #define vin_info(d, fmt, arg...) dev_info(d->dev, fmt, ##arg) 225 #define vin_warn(d, fmt, arg...) dev_warn(d->dev, fmt, ##arg) 226 #define vin_err(d, fmt, arg...) dev_err(d->dev, fmt, ##arg) 227 228 /** 229 * struct rvin_group - VIN CSI2 group information 230 * @refcount: number of VIN instances using the group 231 * 232 * @mdev: media device which represents the group 233 * 234 * @lock: protects the count, notifier, vin and csi members 235 * @count: number of enabled VIN instances found in DT 236 * @notifier: group notifier for CSI-2 async subdevices 237 * @vin: VIN instances which are part of the group 238 * @csi: array of pairs of fwnode and subdev pointers 239 * to all CSI-2 subdevices. 240 */ 241 struct rvin_group { 242 struct kref refcount; 243 244 struct media_device mdev; 245 246 struct mutex lock; 247 unsigned int count; 248 struct v4l2_async_notifier notifier; 249 struct rvin_dev *vin[RCAR_VIN_NUM]; 250 251 struct { 252 struct fwnode_handle *fwnode; 253 struct v4l2_subdev *subdev; 254 } csi[RVIN_CSI_MAX]; 255 }; 256 257 int rvin_dma_register(struct rvin_dev *vin, int irq); 258 void rvin_dma_unregister(struct rvin_dev *vin); 259 260 int rvin_v4l2_register(struct rvin_dev *vin); 261 void rvin_v4l2_unregister(struct rvin_dev *vin); 262 263 const struct rvin_video_format *rvin_format_from_pixel(u32 pixelformat); 264 265 /* Cropping, composing and scaling */ 266 void rvin_crop_scale_comp(struct rvin_dev *vin); 267 268 int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel); 269 270 #endif 271
