1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Microchip Image Sensor Controller (ISC) driver header file 4 * 5 * Copyright (C) 2016-2019 Microchip Technology, Inc. 6 * 7 * Author: Songjun Wu 8 * Author: Eugen Hristev <eugen.hristev@microchip.com> 9 * 10 */ 11 #ifndef _ATMEL_ISC_H_ 12 13 #include <linux/clk-provider.h> 14 #include <linux/platform_device.h> 15 16 #include <media/v4l2-ctrls.h> 17 #include <media/v4l2-device.h> 18 #include <media/videobuf2-dma-contig.h> 19 20 #define ISC_CLK_MAX_DIV 255 21 22 enum isc_clk_id { 23 ISC_ISPCK = 0, 24 ISC_MCK = 1, 25 }; 26 27 struct isc_clk { 28 struct clk_hw hw; 29 struct clk *clk; 30 struct regmap *regmap; 31 spinlock_t lock; /* serialize access to clock registers */ 32 u8 id; 33 u8 parent_id; 34 u32 div; 35 struct device *dev; 36 }; 37 38 #define to_isc_clk(v) container_of(v, struct isc_clk, hw) 39 40 struct isc_buffer { 41 struct vb2_v4l2_buffer vb; 42 struct list_head list; 43 }; 44 45 struct isc_subdev_entity { 46 struct v4l2_subdev *sd; 47 struct v4l2_async_subdev *asd; 48 struct device_node *epn; 49 struct v4l2_async_notifier notifier; 50 51 u32 pfe_cfg0; 52 53 struct list_head list; 54 }; 55 56 /* 57 * struct isc_format - ISC media bus format information 58 This structure represents the interface between the ISC 59 and the sensor. It's the input format received by 60 the ISC. 61 * @fourcc: Fourcc code for this format 62 * @mbus_code: V4L2 media bus format code. 63 * @cfa_baycfg: If this format is RAW BAYER, indicate the type of bayer. 64 this is either BGBG, RGRG, etc. 65 * @pfe_cfg0_bps: Number of hardware data lines connected to the ISC 66 */ 67 68 struct isc_format { 69 u32 fourcc; 70 u32 mbus_code; 71 u32 cfa_baycfg; 72 73 bool sd_support; 74 u32 pfe_cfg0_bps; 75 }; 76 77 /* Pipeline bitmap */ 78 #define DPC_DPCENABLE BIT(0) 79 #define DPC_GDCENABLE BIT(1) 80 #define DPC_BLCENABLE BIT(2) 81 #define WB_ENABLE BIT(3) 82 #define CFA_ENABLE BIT(4) 83 #define CC_ENABLE BIT(5) 84 #define GAM_ENABLE BIT(6) 85 #define GAM_BENABLE BIT(7) 86 #define GAM_GENABLE BIT(8) 87 #define GAM_RENABLE BIT(9) 88 #define VHXS_ENABLE BIT(10) 89 #define CSC_ENABLE BIT(11) 90 #define CBC_ENABLE BIT(12) 91 #define SUB422_ENABLE BIT(13) 92 #define SUB420_ENABLE BIT(14) 93 94 #define GAM_ENABLES (GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE) 95 96 /* 97 * struct fmt_config - ISC format configuration and internal pipeline 98 This structure represents the internal configuration 99 of the ISC. 100 It also holds the format that ISC will present to v4l2. 101 * @sd_format: Pointer to an isc_format struct that holds the sensor 102 configuration. 103 * @fourcc: Fourcc code for this format. 104 * @bpp: Bytes per pixel in the current format. 105 * @bpp_v4l2: Bytes per pixel in the current format, for v4l2. 106 This differs from 'bpp' in the sense that in planar 107 formats, it refers only to the first plane. 108 * @rlp_cfg_mode: Configuration of the RLP (rounding, limiting packaging) 109 * @dcfg_imode: Configuration of the input of the DMA module 110 * @dctrl_dview: Configuration of the output of the DMA module 111 * @bits_pipeline: Configuration of the pipeline, which modules are enabled 112 */ 113 struct fmt_config { 114 struct isc_format *sd_format; 115 116 u32 fourcc; 117 u8 bpp; 118 u8 bpp_v4l2; 119 120 u32 rlp_cfg_mode; 121 u32 dcfg_imode; 122 u32 dctrl_dview; 123 124 u32 bits_pipeline; 125 }; 126 127 #define HIST_ENTRIES 512 128 #define HIST_BAYER (ISC_HIS_CFG_MODE_B + 1) 129 130 enum{ 131 HIST_INIT = 0, 132 HIST_ENABLED, 133 HIST_DISABLED, 134 }; 135 136 struct isc_ctrls { 137 struct v4l2_ctrl_handler handler; 138 139 u32 brightness; 140 u32 contrast; 141 u8 gamma_index; 142 #define ISC_WB_NONE 0 143 #define ISC_WB_AUTO 1 144 #define ISC_WB_ONETIME 2 145 u8 awb; 146 147 /* one for each component : GR, R, GB, B */ 148 u32 gain[HIST_BAYER]; 149 s32 offset[HIST_BAYER]; 150 151 u32 hist_entry[HIST_ENTRIES]; 152 u32 hist_count[HIST_BAYER]; 153 u8 hist_id; 154 u8 hist_stat; 155 #define HIST_MIN_INDEX 0 156 #define HIST_MAX_INDEX 1 157 u32 hist_minmax[HIST_BAYER][2]; 158 }; 159 160 #define ISC_PIPE_LINE_NODE_NUM 15 161 162 /* 163 * struct isc_reg_offsets - ISC device register offsets 164 * @csc: Offset for the CSC register 165 * @cbc: Offset for the CBC register 166 * @sub422: Offset for the SUB422 register 167 * @sub420: Offset for the SUB420 register 168 * @rlp: Offset for the RLP register 169 * @his: Offset for the HIS related registers 170 * @dma: Offset for the DMA related registers 171 * @version: Offset for the version register 172 * @his_entry: Offset for the HIS entries registers 173 */ 174 struct isc_reg_offsets { 175 u32 csc; 176 u32 cbc; 177 u32 sub422; 178 u32 sub420; 179 u32 rlp; 180 u32 his; 181 u32 dma; 182 u32 version; 183 u32 his_entry; 184 }; 185 186 /* 187 * struct isc_device - ISC device driver data/config struct 188 * @regmap: Register map 189 * @hclock: Hclock clock input (refer datasheet) 190 * @ispck: iscpck clock (refer datasheet) 191 * @isc_clks: ISC clocks 192 * @ispck_required: ISC requires ISP Clock initialization 193 * @dcfg: DMA master configuration, architecture dependent 194 * 195 * @dev: Registered device driver 196 * @v4l2_dev: v4l2 registered device 197 * @video_dev: registered video device 198 * 199 * @vb2_vidq: video buffer 2 video queue 200 * @dma_queue_lock: lock to serialize the dma buffer queue 201 * @dma_queue: the queue for dma buffers 202 * @cur_frm: current isc frame/buffer 203 * @sequence: current frame number 204 * @stop: true if isc is not streaming, false if streaming 205 * @comp: completion reference that signals frame completion 206 * 207 * @fmt: current v42l format 208 * @user_formats: list of formats that are supported and agreed with sd 209 * @num_user_formats: how many formats are in user_formats 210 * 211 * @config: current ISC format configuration 212 * @try_config: the current ISC try format , not yet activated 213 * 214 * @ctrls: holds information about ISC controls 215 * @do_wb_ctrl: control regarding the DO_WHITE_BALANCE button 216 * @awb_work: workqueue reference for autowhitebalance histogram 217 * analysis 218 * 219 * @lock: lock for serializing userspace file operations 220 * with ISC operations 221 * @awb_mutex: serialize access to streaming status from awb work queue 222 * @awb_lock: lock for serializing awb work queue operations 223 * with DMA/buffer operations 224 * 225 * @pipeline: configuration of the ISC pipeline 226 * 227 * @current_subdev: current subdevice: the sensor 228 * @subdev_entities: list of subdevice entitites 229 * 230 * @gamma_table: pointer to the table with gamma values, has 231 * gamma_max sets of GAMMA_ENTRIES entries each 232 * @gamma_max: maximum number of sets of inside the gamma_table 233 * 234 * @max_width: maximum frame width, dependent on the internal RAM 235 * @max_height: maximum frame height, dependent on the internal RAM 236 * 237 * @config_dpc: pointer to a function that initializes product 238 * specific DPC module 239 * @config_csc: pointer to a function that initializes product 240 * specific CSC module 241 * @config_cbc: pointer to a function that initializes product 242 * specific CBC module 243 * @config_cc: pointer to a function that initializes product 244 * specific CC module 245 * @config_gam: pointer to a function that initializes product 246 * specific GAMMA module 247 * @config_rlp: pointer to a function that initializes product 248 * specific RLP module 249 * @config_ctrls: pointer to a functoin that initializes product 250 * specific v4l2 controls. 251 * 252 * @adapt_pipeline: pointer to a function that adapts the pipeline bits 253 * to the product specific pipeline 254 * 255 * @offsets: struct holding the product specific register offsets 256 * @controller_formats: pointer to the array of possible formats that the 257 * controller can output 258 * @formats_list: pointer to the array of possible formats that can 259 * be used as an input to the controller 260 * @controller_formats_size: size of controller_formats array 261 * @formats_list_size: size of formats_list array 262 */ 263 struct isc_device { 264 struct regmap *regmap; 265 struct clk *hclock; 266 struct clk *ispck; 267 struct isc_clk isc_clks[2]; 268 bool ispck_required; 269 u32 dcfg; 270 271 struct device *dev; 272 struct v4l2_device v4l2_dev; 273 struct video_device video_dev; 274 275 struct vb2_queue vb2_vidq; 276 spinlock_t dma_queue_lock; 277 struct list_head dma_queue; 278 struct isc_buffer *cur_frm; 279 unsigned int sequence; 280 bool stop; 281 struct completion comp; 282 283 struct v4l2_format fmt; 284 struct isc_format **user_formats; 285 unsigned int num_user_formats; 286 287 struct fmt_config config; 288 struct fmt_config try_config; 289 290 struct isc_ctrls ctrls; 291 struct work_struct awb_work; 292 293 struct mutex lock; 294 struct mutex awb_mutex; 295 spinlock_t awb_lock; 296 297 struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM]; 298 299 struct isc_subdev_entity *current_subdev; 300 struct list_head subdev_entities; 301 302 struct { 303 #define ISC_CTRL_DO_WB 1 304 #define ISC_CTRL_R_GAIN 2 305 #define ISC_CTRL_B_GAIN 3 306 #define ISC_CTRL_GR_GAIN 4 307 #define ISC_CTRL_GB_GAIN 5 308 #define ISC_CTRL_R_OFF 6 309 #define ISC_CTRL_B_OFF 7 310 #define ISC_CTRL_GR_OFF 8 311 #define ISC_CTRL_GB_OFF 9 312 struct v4l2_ctrl *awb_ctrl; 313 struct v4l2_ctrl *do_wb_ctrl; 314 struct v4l2_ctrl *r_gain_ctrl; 315 struct v4l2_ctrl *b_gain_ctrl; 316 struct v4l2_ctrl *gr_gain_ctrl; 317 struct v4l2_ctrl *gb_gain_ctrl; 318 struct v4l2_ctrl *r_off_ctrl; 319 struct v4l2_ctrl *b_off_ctrl; 320 struct v4l2_ctrl *gr_off_ctrl; 321 struct v4l2_ctrl *gb_off_ctrl; 322 }; 323 324 #define GAMMA_ENTRIES 64 325 /* pointer to the defined gamma table */ 326 const u32 (*gamma_table)[GAMMA_ENTRIES]; 327 u32 gamma_max; 328 329 u32 max_width; 330 u32 max_height; 331 332 struct { 333 void (*config_dpc)(struct isc_device *isc); 334 void (*config_csc)(struct isc_device *isc); 335 void (*config_cbc)(struct isc_device *isc); 336 void (*config_cc)(struct isc_device *isc); 337 void (*config_gam)(struct isc_device *isc); 338 void (*config_rlp)(struct isc_device *isc); 339 340 void (*config_ctrls)(struct isc_device *isc, 341 const struct v4l2_ctrl_ops *ops); 342 343 void (*adapt_pipeline)(struct isc_device *isc); 344 }; 345 346 struct isc_reg_offsets offsets; 347 const struct isc_format *controller_formats; 348 struct isc_format *formats_list; 349 u32 controller_formats_size; 350 u32 formats_list_size; 351 }; 352 353 extern const struct regmap_config isc_regmap_config; 354 extern const struct v4l2_async_notifier_operations isc_async_ops; 355 356 irqreturn_t isc_interrupt(int irq, void *dev_id); 357 int isc_pipeline_init(struct isc_device *isc); 358 int isc_clk_init(struct isc_device *isc); 359 void isc_subdev_cleanup(struct isc_device *isc); 360 void isc_clk_cleanup(struct isc_device *isc); 361 362 #endif 363
