drivers/media/platform/rcar_jpu.c

   1 /*
   2  * Author: Mikhail Ulyanov
   3  * Copyright (C) 2014-2015 Cogent Embedded, Inc.  <source@cogentembedded.com>
   4  * Copyright (C) 2014-2015 Renesas Electronics Corporation
   5  *
   6  * This is based on the drivers/media/platform/s5p-jpeg driver by
   7  * Andrzej Pietrasiewicz and Jacek Anaszewski.
   8  * Some portions of code inspired by VSP1 driver by Laurent Pinchart.
   9  *
  10  * TODO in order of priority:
  11  *      1) Rotation
  12  *      2) Cropping
  13  *      3) V4L2_CID_JPEG_ACTIVE_MARKER
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License version 2 as
  17  * published by the Free Software Foundation.
  18  */
  19
  20 #include <asm/unaligned.h>
  21 #include <linux/clk.h>
  22 #include <linux/err.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/io.h>
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/of.h>
  28 #include <linux/of_device.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/slab.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/string.h>
  33 #include <linux/videodev2.h>
  34 #include <media/v4l2-ctrls.h>
  35 #include <media/v4l2-device.h>
  36 #include <media/v4l2-event.h>
  37 #include <media/v4l2-fh.h>
  38 #include <media/v4l2-mem2mem.h>
  39 #include <media/v4l2-ioctl.h>
  40 #include <media/videobuf2-v4l2.h>
  41 #include <media/videobuf2-dma-contig.h>
  42
  43
  44 #define DRV_NAME "rcar_jpu"
  45
  46 /*
  47  * Align JPEG header end to cache line to make sure we will not have any issues
  48  * with cache; additionally to requerment (33.3.27 R01UH0501EJ0100 Rev.1.00)
  49  */
  50 #define JPU_JPEG_HDR_SIZE               (ALIGN(0x258, L1_CACHE_BYTES))
  51 #define JPU_JPEG_MAX_BYTES_PER_PIXEL    2       /* 16 bit precision format */
  52 #define JPU_JPEG_MIN_SIZE               25      /* SOI + SOF + EOI */
  53 #define JPU_JPEG_QTBL_SIZE              0x40
  54 #define JPU_JPEG_HDCTBL_SIZE            0x1c
  55 #define JPU_JPEG_HACTBL_SIZE            0xb2
  56 #define JPU_JPEG_HEIGHT_OFFSET          0x91
  57 #define JPU_JPEG_WIDTH_OFFSET           0x93
  58 #define JPU_JPEG_SUBS_OFFSET            0x97
  59 #define JPU_JPEG_QTBL_LUM_OFFSET        0x07
  60 #define JPU_JPEG_QTBL_CHR_OFFSET        0x4c
  61 #define JPU_JPEG_HDCTBL_LUM_OFFSET      0xa4
  62 #define JPU_JPEG_HACTBL_LUM_OFFSET      0xc5
  63 #define JPU_JPEG_HDCTBL_CHR_OFFSET      0x17c
  64 #define JPU_JPEG_HACTBL_CHR_OFFSET      0x19d
  65 #define JPU_JPEG_PADDING_OFFSET         0x24f
  66 #define JPU_JPEG_LUM 0x00
  67 #define JPU_JPEG_CHR 0x01
  68 #define JPU_JPEG_DC  0x00
  69 #define JPU_JPEG_AC  0x10
  70
  71 #define JPU_JPEG_422 0x21
  72 #define JPU_JPEG_420 0x22
  73
  74 #define JPU_JPEG_DEFAULT_422_PIX_FMT V4L2_PIX_FMT_NV16M
  75 #define JPU_JPEG_DEFAULT_420_PIX_FMT V4L2_PIX_FMT_NV12M
  76
  77 /* JPEG markers */
  78 #define TEM     0x01
  79 #define SOF0    0xc0
  80 #define RST     0xd0
  81 #define SOI     0xd8
  82 #define EOI     0xd9
  83 #define DHP     0xde
  84 #define DHT     0xc4
  85 #define COM     0xfe
  86 #define DQT     0xdb
  87 #define DRI     0xdd
  88 #define APP0    0xe0
  89
  90 #define JPU_RESET_TIMEOUT       100 /* ms */
  91 #define JPU_JOB_TIMEOUT         300 /* ms */
  92 #define JPU_MAX_QUALITY         4
  93 #define JPU_WIDTH_MIN           16
  94 #define JPU_HEIGHT_MIN          16
  95 #define JPU_WIDTH_MAX           4096
  96 #define JPU_HEIGHT_MAX          4096
  97 #define JPU_MEMALIGN            8
  98
  99 /* Flags that indicate a format can be used for capture/output */
 100 #define JPU_FMT_TYPE_OUTPUT     0
 101 #define JPU_FMT_TYPE_CAPTURE    1
 102 #define JPU_ENC_CAPTURE         (1 << 0)
 103 #define JPU_ENC_OUTPUT          (1 << 1)
 104 #define JPU_DEC_CAPTURE         (1 << 2)
 105 #define JPU_DEC_OUTPUT          (1 << 3)
 106
 107 /*
 108  * JPEG registers and bits
 109  */
 110
 111 /* JPEG code mode register */
 112 #define JCMOD   0x00
 113 #define JCMOD_PCTR              (1 << 7)
 114 #define JCMOD_MSKIP_ENABLE      (1 << 5)
 115 #define JCMOD_DSP_ENC           (0 << 3)
 116 #define JCMOD_DSP_DEC           (1 << 3)
 117 #define JCMOD_REDU              (7 << 0)
 118 #define JCMOD_REDU_422          (1 << 0)
 119 #define JCMOD_REDU_420          (2 << 0)
 120
 121 /* JPEG code command register */
 122 #define JCCMD   0x04
 123 #define JCCMD_SRST      (1 << 12)
 124 #define JCCMD_JEND      (1 << 2)
 125 #define JCCMD_JSRT      (1 << 0)
 126
 127 /* JPEG code quantanization table number register */
 128 #define JCQTN   0x0c
 129 #define JCQTN_SHIFT(t)          (((t) - 1) << 1)
 130
 131 /* JPEG code Huffman table number register */
 132 #define JCHTN   0x10
 133 #define JCHTN_AC_SHIFT(t)       (((t) << 1) - 1)
 134 #define JCHTN_DC_SHIFT(t)       (((t) - 1) << 1)
 135
 136 #define JCVSZU  0x1c /* JPEG code vertical size upper register */
 137 #define JCVSZD  0x20 /* JPEG code vertical size lower register */
 138 #define JCHSZU  0x24 /* JPEG code horizontal size upper register */
 139 #define JCHSZD  0x28 /* JPEG code horizontal size lower register */
 140 #define JCSZ_MASK 0xff /* JPEG code h/v size register contains only 1 byte*/
 141
 142 #define JCDTCU  0x2c /* JPEG code data count upper register */
 143 #define JCDTCM  0x30 /* JPEG code data count middle register */
 144 #define JCDTCD  0x34 /* JPEG code data count lower register */
 145
 146 /* JPEG interrupt enable register */
 147 #define JINTE   0x38
 148 #define JINTE_ERR               (7 << 5) /* INT5 + INT6 + INT7 */
 149 #define JINTE_TRANSF_COMPL      (1 << 10)
 150
 151 /* JPEG interrupt status register */
 152 #define JINTS   0x3c
 153 #define JINTS_MASK      0x7c68
 154 #define JINTS_ERR               (1 << 5)
 155 #define JINTS_PROCESS_COMPL     (1 << 6)
 156 #define JINTS_TRANSF_COMPL      (1 << 10)
 157
 158 #define JCDERR  0x40 /* JPEG code decode error register */
 159 #define JCDERR_MASK     0xf /* JPEG code decode error register mask*/
 160
 161 /* JPEG interface encoding */
 162 #define JIFECNT 0x70
 163 #define JIFECNT_INFT_422        0
 164 #define JIFECNT_INFT_420        1
 165 #define JIFECNT_SWAP_WB         (3 << 4) /* to JPU */
 166
 167 #define JIFESYA1        0x74    /* encode source Y address register 1 */
 168 #define JIFESCA1        0x78    /* encode source C address register 1 */
 169 #define JIFESYA2        0x7c    /* encode source Y address register 2 */
 170 #define JIFESCA2        0x80    /* encode source C address register 2 */
 171 #define JIFESMW         0x84    /* encode source memory width register */
 172 #define JIFESVSZ        0x88    /* encode source vertical size register */
 173 #define JIFESHSZ        0x8c    /* encode source horizontal size register */
 174 #define JIFEDA1         0x90    /* encode destination address register 1 */
 175 #define JIFEDA2         0x94    /* encode destination address register 2 */
 176
 177 /* JPEG decoding control register */
 178 #define JIFDCNT 0xa0
 179 #define JIFDCNT_SWAP_WB         (3 << 1) /* from JPU */
 180
 181 #define JIFDSA1         0xa4    /* decode source address register 1 */
 182 #define JIFDDMW         0xb0    /* decode destination  memory width register */
 183 #define JIFDDVSZ        0xb4    /* decode destination  vert. size register */
 184 #define JIFDDHSZ        0xb8    /* decode destination  horiz. size register */
 185 #define JIFDDYA1        0xbc    /* decode destination  Y address register 1 */
 186 #define JIFDDCA1        0xc0    /* decode destination  C address register 1 */
 187
 188 #define JCQTBL(n)       (0x10000 + (n) * 0x40)  /* quantization tables regs */
 189 #define JCHTBD(n)       (0x10100 + (n) * 0x100) /* Huffman table DC regs */
 190 #define JCHTBA(n)       (0x10120 + (n) * 0x100) /* Huffman table AC regs */
 191
 192 /**
 193  * struct jpu - JPEG IP abstraction
 194  * @mutex: the mutex protecting this structure
 195  * @lock: spinlock protecting the device contexts
 196  * @v4l2_dev: v4l2 device for mem2mem mode
 197  * @vfd_encoder: video device node for encoder mem2mem mode
 198  * @vfd_decoder: video device node for decoder mem2mem mode
 199  * @m2m_dev: v4l2 mem2mem device data
 200  * @curr: pointer to current context
 201  * @irq_queue:  interrupt handler waitqueue
 202  * @regs: JPEG IP registers mapping
 203  * @irq: JPEG IP irq
 204  * @clk: JPEG IP clock
 205  * @dev: JPEG IP struct device
 206  * @alloc_ctx: videobuf2 memory allocator's context
 207  * @ref_count: reference counter
 208  */
 209 struct jpu {
 210         struct mutex    mutex;
 211         spinlock_t      lock;
 212         struct v4l2_device      v4l2_dev;
 213         struct video_device     vfd_encoder;
 214         struct video_device     vfd_decoder;
 215         struct v4l2_m2m_dev     *m2m_dev;
 216         struct jpu_ctx          *curr;
 217         wait_queue_head_t       irq_queue;
 218
 219         void __iomem            *regs;
 220         unsigned int            irq;
 221         struct clk              *clk;
 222         struct device           *dev;
 223         void                    *alloc_ctx;
 224         int                     ref_count;
 225 };
 226
 227 /**
 228  * struct jpu_buffer - driver's specific video buffer
 229  * @buf: m2m buffer
 230  * @compr_quality: destination image quality in compression mode
 231  * @subsampling: source image subsampling in decompression mode
 232  */
 233 struct jpu_buffer {
 234         struct v4l2_m2m_buffer buf;
 235         unsigned short  compr_quality;
 236         unsigned char   subsampling;
 237 };
 238
 239 /**
 240  * struct jpu_fmt - driver's internal format data
 241  * @fourcc: the fourcc code, 0 if not applicable
 242  * @colorspace: the colorspace specifier
 243  * @bpp: number of bits per pixel per plane
 244  * @h_align: horizontal alignment order (align to 2^h_align)
 245  * @v_align: vertical alignment order (align to 2^v_align)
 246  * @subsampling: (horizontal:4 | vertical:4) subsampling factor
 247  * @num_planes: number of planes
 248  * @types: types of queue this format is applicable to
 249  */
 250 struct jpu_fmt {
 251         u32 fourcc;
 252         u32 colorspace;
 253         u8 bpp[2];
 254         u8 h_align;
 255         u8 v_align;
 256         u8 subsampling;
 257         u8 num_planes;
 258         u16 types;
 259 };
 260
 261 /**
 262  * jpu_q_data - parameters of one queue
 263  * @fmtinfo: driver-specific format of this queue
 264  * @format: multiplanar format of this queue
 265  * @sequence: sequence number
 266  */
 267 struct jpu_q_data {
 268         struct jpu_fmt *fmtinfo;
 269         struct v4l2_pix_format_mplane format;
 270         unsigned int sequence;
 271 };
 272
 273 /**
 274  * jpu_ctx - the device context data
 275  * @jpu: JPEG IP device for this context
 276  * @encoder: compression (encode) operation or decompression (decode)
 277  * @compr_quality: destination image quality in compression (encode) mode
 278  * @out_q: source (output) queue information
 279  * @cap_q: destination (capture) queue information
 280  * @fh: file handler
 281  * @ctrl_handler: controls handler
 282  */
 283 struct jpu_ctx {
 284         struct jpu              *jpu;
 285         bool                    encoder;
 286         unsigned short          compr_quality;
 287         struct jpu_q_data       out_q;
 288         struct jpu_q_data       cap_q;
 289         struct v4l2_fh          fh;
 290         struct v4l2_ctrl_handler ctrl_handler;
 291 };
 292
 293  /**
 294  * jpeg_buffer - description of memory containing input JPEG data
 295  * @end: end position in the buffer
 296  * @curr: current position in the buffer
 297  */
 298 struct jpeg_buffer {
 299         void *end;
 300         void *curr;
 301 };
 302
 303 static struct jpu_fmt jpu_formats[] = {
 304         { V4L2_PIX_FMT_JPEG, V4L2_COLORSPACE_JPEG,
 305           {0, 0}, 0, 0, 0, 1, JPU_ENC_CAPTURE | JPU_DEC_OUTPUT },
 306         { V4L2_PIX_FMT_NV16M, V4L2_COLORSPACE_SRGB,
 307           {8, 8}, 2, 2, JPU_JPEG_422, 2, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
 308         { V4L2_PIX_FMT_NV12M, V4L2_COLORSPACE_SRGB,
 309           {8, 4}, 2, 2, JPU_JPEG_420, 2, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
 310         { V4L2_PIX_FMT_NV16, V4L2_COLORSPACE_SRGB,
 311           {16, 0}, 2, 2, JPU_JPEG_422, 1, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
 312         { V4L2_PIX_FMT_NV12, V4L2_COLORSPACE_SRGB,
 313           {12, 0}, 2, 2, JPU_JPEG_420, 1, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
 314 };
 315
 316 static const u8 zigzag[] = {
 317         0x03, 0x02, 0x0b, 0x13, 0x0a, 0x01, 0x00, 0x09,
 318         0x12, 0x1b, 0x23, 0x1a, 0x11, 0x08, 0x07, 0x06,
 319         0x0f, 0x10, 0x19, 0x22, 0x2b, 0x33, 0x2a, 0x21,
 320         0x18, 0x17, 0x0e, 0x05, 0x04, 0x0d, 0x16, 0x1f,
 321         0x20, 0x29, 0x32, 0x3b, 0x3a, 0x31, 0x28, 0x27,
 322         0x1e, 0x15, 0x0e, 0x14, 0x10, 0x26, 0x2f, 0x30,
 323         0x39, 0x38, 0x37, 0x2e, 0x25, 0x1c, 0x24, 0x2b,
 324         0x36, 0x3f, 0x3e, 0x35, 0x2c, 0x34, 0x3d, 0x3c
 325 };
 326
 327 #define QTBL_SIZE (ALIGN(JPU_JPEG_QTBL_SIZE, \
 328                           sizeof(unsigned int)) / sizeof(unsigned int))
 329 #define HDCTBL_SIZE (ALIGN(JPU_JPEG_HDCTBL_SIZE, \
 330                           sizeof(unsigned int)) / sizeof(unsigned int))
 331 #define HACTBL_SIZE (ALIGN(JPU_JPEG_HACTBL_SIZE, \
 332                           sizeof(unsigned int)) / sizeof(unsigned int))
 333 /*
 334  * Start of image; Quantization tables
 335  * SOF0 (17 bytes payload) is Baseline DCT - Sample precision, height, width,
 336  * Number of image components, (Ci:8 - Hi:4 - Vi:4 - Tq:8) * 3 - Y,Cb,Cr;
 337  * Huffman tables; Padding with 0xff (33.3.27 R01UH0501EJ0100 Rev.1.00)
 338  */
 339 #define JPU_JPEG_HDR_BLOB {                                                    \
 340         0xff, SOI, 0xff, DQT, 0x00, JPU_JPEG_QTBL_SIZE + 0x3, JPU_JPEG_LUM,    \
 341         [JPU_JPEG_QTBL_LUM_OFFSET ...                                          \
 342                 JPU_JPEG_QTBL_LUM_OFFSET + JPU_JPEG_QTBL_SIZE - 1] = 0x00,     \
 343         0xff, DQT, 0x00, JPU_JPEG_QTBL_SIZE + 0x3, JPU_JPEG_CHR,               \
 344         [JPU_JPEG_QTBL_CHR_OFFSET ... JPU_JPEG_QTBL_CHR_OFFSET +               \
 345                 JPU_JPEG_QTBL_SIZE - 1] = 0x00, 0xff, SOF0, 0x00, 0x11, 0x08,  \
 346         [JPU_JPEG_HEIGHT_OFFSET ... JPU_JPEG_HEIGHT_OFFSET + 1] = 0x00,        \
 347         [JPU_JPEG_WIDTH_OFFSET ... JPU_JPEG_WIDTH_OFFSET + 1] = 0x00,          \
 348         0x03, 0x01, [JPU_JPEG_SUBS_OFFSET] = 0x00, JPU_JPEG_LUM,               \
 349         0x02, 0x11, JPU_JPEG_CHR, 0x03, 0x11, JPU_JPEG_CHR,                    \
 350         0xff, DHT, 0x00, JPU_JPEG_HDCTBL_SIZE + 0x3, JPU_JPEG_LUM|JPU_JPEG_DC, \
 351         [JPU_JPEG_HDCTBL_LUM_OFFSET ...                                        \
 352                 JPU_JPEG_HDCTBL_LUM_OFFSET + JPU_JPEG_HDCTBL_SIZE - 1] = 0x00, \
 353         0xff, DHT, 0x00, JPU_JPEG_HACTBL_SIZE + 0x3, JPU_JPEG_LUM|JPU_JPEG_AC, \
 354         [JPU_JPEG_HACTBL_LUM_OFFSET ...                                        \
 355                 JPU_JPEG_HACTBL_LUM_OFFSET + JPU_JPEG_HACTBL_SIZE - 1] = 0x00, \
 356         0xff, DHT, 0x00, JPU_JPEG_HDCTBL_SIZE + 0x3, JPU_JPEG_CHR|JPU_JPEG_DC, \
 357         [JPU_JPEG_HDCTBL_CHR_OFFSET ...                                        \
 358                 JPU_JPEG_HDCTBL_CHR_OFFSET + JPU_JPEG_HDCTBL_SIZE - 1] = 0x00, \
 359         0xff, DHT, 0x00, JPU_JPEG_HACTBL_SIZE + 0x3, JPU_JPEG_CHR|JPU_JPEG_AC, \
 360         [JPU_JPEG_HACTBL_CHR_OFFSET ...                                        \
 361                 JPU_JPEG_HACTBL_CHR_OFFSET + JPU_JPEG_HACTBL_SIZE - 1] = 0x00, \
 362         [JPU_JPEG_PADDING_OFFSET ... JPU_JPEG_HDR_SIZE - 1] = 0xff             \
 363 }
 364
 365 static unsigned char jpeg_hdrs[JPU_MAX_QUALITY][JPU_JPEG_HDR_SIZE] = {
 366         [0 ... JPU_MAX_QUALITY - 1] = JPU_JPEG_HDR_BLOB
 367 };
 368
 369 static const unsigned int qtbl_lum[JPU_MAX_QUALITY][QTBL_SIZE] = {
 370         {
 371                 0x14101927, 0x322e3e44, 0x10121726, 0x26354144,
 372                 0x19171f26, 0x35414444, 0x27262635, 0x41444444,
 373                 0x32263541, 0x44444444, 0x2e354144, 0x44444444,
 374                 0x3e414444, 0x44444444, 0x44444444, 0x44444444
 375         },
 376         {
 377                 0x100b0b10, 0x171b1f1e, 0x0b0c0c0f, 0x1417171e,
 378                 0x0b0c0d10, 0x171a232f, 0x100f1017, 0x1a252f40,
 379                 0x1714171a, 0x27334040, 0x1b171a25, 0x33404040,
 380                 0x1f17232f, 0x40404040, 0x1e1e2f40, 0x40404040
 381         },
 382         {
 383                 0x0c08080c, 0x11151817, 0x0809090b, 0x0f131217,
 384                 0x08090a0c, 0x13141b24, 0x0c0b0c15, 0x141c2435,
 385                 0x110f1314, 0x1e27333b, 0x1513141c, 0x27333b3b,
 386                 0x18121b24, 0x333b3b3b, 0x17172435, 0x3b3b3b3b
 387         },
 388         {
 389                 0x08060608, 0x0c0e1011, 0x06060608, 0x0a0d0c0f,
 390                 0x06060708, 0x0d0e1218, 0x0808080e, 0x0d131823,
 391                 0x0c0a0d0d, 0x141a2227, 0x0e0d0e13, 0x1a222727,
 392                 0x100c1318, 0x22272727, 0x110f1823, 0x27272727
 393         }
 394 };
 395
 396 static const unsigned int qtbl_chr[JPU_MAX_QUALITY][QTBL_SIZE] = {
 397         {
 398                 0x15192026, 0x36444444, 0x191c1826, 0x36444444,
 399                 0x2018202b, 0x42444444, 0x26262b35, 0x44444444,
 400                 0x36424444, 0x44444444, 0x44444444, 0x44444444,
 401                 0x44444444, 0x44444444, 0x44444444, 0x44444444
 402         },
 403         {
 404                 0x110f1115, 0x141a2630, 0x0f131211, 0x141a232b,
 405                 0x11121416, 0x1a1e2e35, 0x1511161c, 0x1e273540,
 406                 0x14141a1e, 0x27304040, 0x1a1a1e27, 0x303f4040,
 407                 0x26232e35, 0x40404040, 0x302b3540, 0x40404040
 408         },
 409         {
 410                 0x0d0b0d10, 0x14141d25, 0x0b0e0e0e, 0x10141a20,
 411                 0x0d0e0f11, 0x14172328, 0x100e1115, 0x171e2832,
 412                 0x14101417, 0x1e25323b, 0x1414171e, 0x25303b3b,
 413                 0x1d1a2328, 0x323b3b3b, 0x25202832, 0x3b3b3b3b
 414         },
 415         {
 416                 0x0908090b, 0x0e111318, 0x080a090b, 0x0e0d1116,
 417                 0x09090d0e, 0x0d0f171a, 0x0b0b0e0e, 0x0f141a21,
 418                 0x0e0e0d0f, 0x14182127, 0x110d0f14, 0x18202727,
 419                 0x1311171a, 0x21272727, 0x18161a21, 0x27272727
 420         }
 421 };
 422
 423 static const unsigned int hdctbl_lum[HDCTBL_SIZE] = {
 424         0x00010501, 0x01010101, 0x01000000, 0x00000000,
 425         0x00010203, 0x04050607, 0x08090a0b
 426 };
 427
 428 static const unsigned int hdctbl_chr[HDCTBL_SIZE] = {
 429         0x00010501, 0x01010101, 0x01000000, 0x00000000,
 430         0x00010203, 0x04050607, 0x08090a0b
 431 };
 432
 433 static const unsigned int hactbl_lum[HACTBL_SIZE] = {
 434         0x00020103, 0x03020403, 0x05050404, 0x0000017d, 0x01020300, 0x04110512,
 435         0x21314106, 0x13516107, 0x22711432, 0x8191a108, 0x2342b1c1, 0x1552d1f0,
 436         0x24336272, 0x82090a16, 0x1718191a, 0x25262728, 0x292a3435, 0x36373839,
 437         0x3a434445, 0x46474849, 0x4a535455, 0x56575859, 0x5a636465, 0x66676869,
 438         0x6a737475, 0x76777879, 0x7a838485, 0x86878889, 0x8a929394, 0x95969798,
 439         0x999aa2a3, 0xa4a5a6a7, 0xa8a9aab2, 0xb3b4b5b6, 0xb7b8b9ba, 0xc2c3c4c5,
 440         0xc6c7c8c9, 0xcad2d3d4, 0xd5d6d7d8, 0xd9dae1e2, 0xe3e4e5e6, 0xe7e8e9ea,
 441         0xf1f2f3f4, 0xf5f6f7f8, 0xf9fa0000
 442 };
 443
 444 static const unsigned int hactbl_chr[HACTBL_SIZE] = {
 445         0x00020103, 0x03020403, 0x05050404, 0x0000017d, 0x01020300, 0x04110512,
 446         0x21314106, 0x13516107, 0x22711432, 0x8191a108, 0x2342b1c1, 0x1552d1f0,
 447         0x24336272, 0x82090a16, 0x1718191a, 0x25262728, 0x292a3435, 0x36373839,
 448         0x3a434445, 0x46474849, 0x4a535455, 0x56575859, 0x5a636465, 0x66676869,
 449         0x6a737475, 0x76777879, 0x7a838485, 0x86878889, 0x8a929394, 0x95969798,
 450         0x999aa2a3, 0xa4a5a6a7, 0xa8a9aab2, 0xb3b4b5b6, 0xb7b8b9ba, 0xc2c3c4c5,
 451         0xc6c7c8c9, 0xcad2d3d4, 0xd5d6d7d8, 0xd9dae1e2, 0xe3e4e5e6, 0xe7e8e9ea,
 452         0xf1f2f3f4, 0xf5f6f7f8, 0xf9fa0000
 453 };
 454
 455 static const char *error_to_text[16] = {
 456         "Normal",
 457         "SOI not detected",
 458         "SOF1 to SOFF detected",
 459         "Subsampling not detected",
 460         "SOF accuracy error",
 461         "DQT accuracy error",
 462         "Component error 1",
 463         "Component error 2",
 464         "SOF0, DQT, and DHT not detected when SOS detected",
 465         "SOS not detected",
 466         "EOI not detected",
 467         "Restart interval data number error detected",
 468         "Image size error",
 469         "Last MCU data number error",
 470         "Block data number error",
 471         "Unknown"
 472 };
 473
 474 static struct jpu_buffer *vb2_to_jpu_buffer(struct vb2_buffer *vb)
 475 {
 476         struct v4l2_m2m_buffer *b =
 477                 container_of(vb, struct v4l2_m2m_buffer, vb);
 478
 479         return container_of(b, struct jpu_buffer, buf);
 480 }
 481
 482 static u32 jpu_read(struct jpu *jpu, unsigned int reg)
 483 {
 484         return ioread32(jpu->regs + reg);
 485 }
 486
 487 static void jpu_write(struct jpu *jpu, u32 val, unsigned int reg)
 488 {
 489         iowrite32(val, jpu->regs + reg);
 490 }
 491
 492 static struct jpu_ctx *ctrl_to_ctx(struct v4l2_ctrl *c)
 493 {
 494         return container_of(c->handler, struct jpu_ctx, ctrl_handler);
 495 }
 496
 497 static struct jpu_ctx *fh_to_ctx(struct v4l2_fh *fh)
 498 {
 499         return container_of(fh, struct jpu_ctx, fh);
 500 }
 501
 502 static void jpu_set_tbl(struct jpu *jpu, u32 reg, const unsigned int *tbl,
 503                         unsigned int len) {
 504         unsigned int i;
 505
 506         for (i = 0; i < len; i++)
 507                 jpu_write(jpu, tbl[i], reg + (i << 2));
 508 }
 509
 510 static void jpu_set_qtbl(struct jpu *jpu, unsigned short quality)
 511 {
 512         jpu_set_tbl(jpu, JCQTBL(0), qtbl_lum[quality], QTBL_SIZE);
 513         jpu_set_tbl(jpu, JCQTBL(1), qtbl_chr[quality], QTBL_SIZE);
 514 }
 515
 516 static void jpu_set_htbl(struct jpu *jpu)
 517 {
 518         jpu_set_tbl(jpu, JCHTBD(0), hdctbl_lum, HDCTBL_SIZE);
 519         jpu_set_tbl(jpu, JCHTBA(0), hactbl_lum, HACTBL_SIZE);
 520         jpu_set_tbl(jpu, JCHTBD(1), hdctbl_chr, HDCTBL_SIZE);
 521         jpu_set_tbl(jpu, JCHTBA(1), hactbl_chr, HACTBL_SIZE);
 522 }
 523
 524 static int jpu_wait_reset(struct jpu *jpu)
 525 {
 526         unsigned long timeout;
 527
 528         timeout = jiffies + msecs_to_jiffies(JPU_RESET_TIMEOUT);
 529
 530         while (jpu_read(jpu, JCCMD) & JCCMD_SRST) {
 531                 if (time_after(jiffies, timeout)) {
 532                         dev_err(jpu->dev, "timed out in reset\n");
 533                         return -ETIMEDOUT;
 534                 }
 535                 schedule();
 536         }
 537
 538         return 0;
 539 }
 540
 541 static int jpu_reset(struct jpu *jpu)
 542 {
 543         jpu_write(jpu, JCCMD_SRST, JCCMD);
 544         return jpu_wait_reset(jpu);
 545 }
 546
 547 /*
 548  * ============================================================================
 549  * video ioctl operations
 550  * ============================================================================
 551  */
 552 static void put_qtbl(u8 *p, const u8 *qtbl)
 553 {
 554         unsigned int i;
 555
 556         for (i = 0; i < ARRAY_SIZE(zigzag); i++)
 557                 p[i] = *(qtbl + zigzag[i]);
 558 }
 559
 560 static void put_htbl(u8 *p, const u8 *htbl, unsigned int len)
 561 {
 562         unsigned int i, j;
 563
 564         for (i = 0; i < len; i += 4)
 565                 for (j = 0; j < 4 && (i + j) < len; ++j)
 566                         p[i + j] = htbl[i + 3 - j];
 567 }
 568
 569 static void jpu_generate_hdr(unsigned short quality, unsigned char *p)
 570 {
 571         put_qtbl(p + JPU_JPEG_QTBL_LUM_OFFSET, (const u8 *)qtbl_lum[quality]);
 572         put_qtbl(p + JPU_JPEG_QTBL_CHR_OFFSET, (const u8 *)qtbl_chr[quality]);
 573
 574         put_htbl(p + JPU_JPEG_HDCTBL_LUM_OFFSET, (const u8 *)hdctbl_lum,
 575                  JPU_JPEG_HDCTBL_SIZE);
 576         put_htbl(p + JPU_JPEG_HACTBL_LUM_OFFSET, (const u8 *)hactbl_lum,
 577                  JPU_JPEG_HACTBL_SIZE);
 578
 579         put_htbl(p + JPU_JPEG_HDCTBL_CHR_OFFSET, (const u8 *)hdctbl_chr,
 580                  JPU_JPEG_HDCTBL_SIZE);
 581         put_htbl(p + JPU_JPEG_HACTBL_CHR_OFFSET, (const u8 *)hactbl_chr,
 582                  JPU_JPEG_HACTBL_SIZE);
 583 }
 584
 585 static int get_byte(struct jpeg_buffer *buf)
 586 {
 587         if (buf->curr >= buf->end)
 588                 return -1;
 589
 590         return *(u8 *)buf->curr++;
 591 }
 592
 593 static int get_word_be(struct jpeg_buffer *buf, unsigned int *word)
 594 {
 595         if (buf->end - buf->curr < 2)
 596                 return -1;
 597
 598         *word = get_unaligned_be16(buf->curr);
 599         buf->curr += 2;
 600
 601         return 0;
 602 }
 603
 604 static void skip(struct jpeg_buffer *buf, unsigned long len)
 605 {
 606         buf->curr += min((unsigned long)(buf->end - buf->curr), len);
 607 }
 608
 609 static u8 jpu_parse_hdr(void *buffer, unsigned long size, unsigned int *width,
 610                           unsigned int *height)
 611 {
 612         struct jpeg_buffer jpeg_buffer;
 613         unsigned int word;
 614         bool soi = false;
 615
 616         jpeg_buffer.end = buffer + size;
 617         jpeg_buffer.curr = buffer;
 618
 619         /*
 620          * basic size check and EOI - we don't want to let JPU cross
 621          * buffer bounds in any case. Hope it's stopping by EOI.
 622          */
 623         if (size < JPU_JPEG_MIN_SIZE || *(u8 *)(buffer + size - 1) != EOI)
 624                 return 0;
 625
 626         for (;;) {
 627                 int c;
 628
 629                 /* skip preceding filler bytes */
 630                 do
 631                         c = get_byte(&jpeg_buffer);
 632                 while (c == 0xff || c == 0);
 633
 634                 if (!soi && c == SOI) {
 635                         soi = true;
 636                         continue;
 637                 } else if (soi != (c != SOI))
 638                         return 0;
 639
 640                 switch (c) {
 641                 case SOF0: /* SOF0: baseline JPEG */
 642                         skip(&jpeg_buffer, 3); /* segment length and bpp */
 643                         if (get_word_be(&jpeg_buffer, height) ||
 644                             get_word_be(&jpeg_buffer, width) ||
 645                             get_byte(&jpeg_buffer) != 3) /* YCbCr only */
 646                                 return 0;
 647
 648                         skip(&jpeg_buffer, 1);
 649                         return get_byte(&jpeg_buffer);
 650                 case DHT:
 651                 case DQT:
 652                 case COM:
 653                 case DRI:
 654                 case APP0 ... APP0 + 0x0f:
 655                         if (get_word_be(&jpeg_buffer, &word))
 656                                 return 0;
 657                         skip(&jpeg_buffer, (long)word - 2);
 658                 case 0:
 659                         break;
 660                 default:
 661                         return 0;
 662                 }
 663         }
 664
 665         return 0;
 666 }
 667
 668 static int jpu_querycap(struct file *file, void *priv,
 669                         struct v4l2_capability *cap)
 670 {
 671         struct jpu_ctx *ctx = fh_to_ctx(priv);
 672
 673         if (ctx->encoder)
 674                 strlcpy(cap->card, DRV_NAME " encoder", sizeof(cap->card));
 675         else
 676                 strlcpy(cap->card, DRV_NAME " decoder", sizeof(cap->card));
 677
 678         strlcpy(cap->driver, DRV_NAME, sizeof(cap->driver));
 679         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 680                  dev_name(ctx->jpu->dev));
 681         cap->device_caps |= V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;
 682         cap->capabilities = V4L2_CAP_DEVICE_CAPS | cap->device_caps;
 683         memset(cap->reserved, 0, sizeof(cap->reserved));
 684
 685         return 0;
 686 }
 687
 688 static struct jpu_fmt *jpu_find_format(bool encoder, u32 pixelformat,
 689                                        unsigned int fmt_type)
 690 {
 691         unsigned int i, fmt_flag;
 692
 693         if (encoder)
 694                 fmt_flag = fmt_type == JPU_FMT_TYPE_OUTPUT ? JPU_ENC_OUTPUT :
 695                                                              JPU_ENC_CAPTURE;
 696         else
 697                 fmt_flag = fmt_type == JPU_FMT_TYPE_OUTPUT ? JPU_DEC_OUTPUT :
 698                                                              JPU_DEC_CAPTURE;
 699
 700         for (i = 0; i < ARRAY_SIZE(jpu_formats); i++) {
 701                 struct jpu_fmt *fmt = &jpu_formats[i];
 702
 703                 if (fmt->fourcc == pixelformat && fmt->types & fmt_flag)
 704                         return fmt;
 705         }
 706
 707         return NULL;
 708 }
 709
 710 static int jpu_enum_fmt(struct v4l2_fmtdesc *f, u32 type)
 711 {
 712         unsigned int i, num = 0;
 713
 714         for (i = 0; i < ARRAY_SIZE(jpu_formats); ++i) {
 715                 if (jpu_formats[i].types & type) {
 716                         if (num == f->index)
 717                                 break;
 718                         ++num;
 719                 }
 720         }
 721
 722         if (i >= ARRAY_SIZE(jpu_formats))
 723                 return -EINVAL;
 724
 725         f->pixelformat = jpu_formats[i].fourcc;
 726
 727         return 0;
 728 }
 729
 730 static int jpu_enum_fmt_cap(struct file *file, void *priv,
 731                             struct v4l2_fmtdesc *f)
 732 {
 733         struct jpu_ctx *ctx = fh_to_ctx(priv);
 734
 735         return jpu_enum_fmt(f, ctx->encoder ? JPU_ENC_CAPTURE :
 736                             JPU_DEC_CAPTURE);
 737 }
 738
 739 static int jpu_enum_fmt_out(struct file *file, void *priv,
 740                             struct v4l2_fmtdesc *f)
 741 {
 742         struct jpu_ctx *ctx = fh_to_ctx(priv);
 743
 744         return jpu_enum_fmt(f, ctx->encoder ? JPU_ENC_OUTPUT : JPU_DEC_OUTPUT);
 745 }
 746
 747 static struct jpu_q_data *jpu_get_q_data(struct jpu_ctx *ctx,
 748                                          enum v4l2_buf_type type)
 749 {
 750         if (V4L2_TYPE_IS_OUTPUT(type))
 751                 return &ctx->out_q;
 752         else
 753                 return &ctx->cap_q;
 754 }
 755
 756 static void jpu_bound_align_image(u32 *w, unsigned int w_min,
 757                                   unsigned int w_max, unsigned int w_align,
 758                                   u32 *h, unsigned int h_min,
 759                                   unsigned int h_max, unsigned int h_align)
 760 {
 761         unsigned int width, height, w_step, h_step;
 762
 763         width = *w;
 764         height = *h;
 765
 766         w_step = 1U << w_align;
 767         h_step = 1U << h_align;
 768         v4l_bound_align_image(w, w_min, w_max, w_align, h, h_min, h_max,
 769                               h_align, 3);
 770
 771         if (*w < width && *w + w_step < w_max)
 772                 *w += w_step;
 773         if (*h < height && *h + h_step < h_max)
 774                 *h += h_step;
 775 }
 776
 777 static int __jpu_try_fmt(struct jpu_ctx *ctx, struct jpu_fmt **fmtinfo,
 778                          struct v4l2_pix_format_mplane *pix,
 779                          enum v4l2_buf_type type)
 780 {
 781         struct jpu_fmt *fmt;
 782         unsigned int f_type, w, h;
 783
 784         f_type = V4L2_TYPE_IS_OUTPUT(type) ? JPU_FMT_TYPE_OUTPUT :
 785                                                 JPU_FMT_TYPE_CAPTURE;
 786
 787         fmt = jpu_find_format(ctx->encoder, pix->pixelformat, f_type);
 788         if (!fmt) {
 789                 unsigned int pixelformat;
 790
 791                 dev_dbg(ctx->jpu->dev, "unknown format; set default format\n");
 792                 if (ctx->encoder)
 793                         pixelformat = f_type == JPU_FMT_TYPE_OUTPUT ?
 794                                 V4L2_PIX_FMT_NV16M : V4L2_PIX_FMT_JPEG;
 795                 else
 796                         pixelformat = f_type == JPU_FMT_TYPE_CAPTURE ?
 797                                 V4L2_PIX_FMT_NV16M : V4L2_PIX_FMT_JPEG;
 798                 fmt = jpu_find_format(ctx->encoder, pixelformat, f_type);
 799         }
 800
 801         pix->pixelformat = fmt->fourcc;
 802         pix->colorspace = fmt->colorspace;
 803         pix->field = V4L2_FIELD_NONE;
 804         pix->num_planes = fmt->num_planes;
 805         memset(pix->reserved, 0, sizeof(pix->reserved));
 806
 807         jpu_bound_align_image(&pix->width, JPU_WIDTH_MIN, JPU_WIDTH_MAX,
 808                               fmt->h_align, &pix->height, JPU_HEIGHT_MIN,
 809                               JPU_HEIGHT_MAX, fmt->v_align);
 810
 811         w = pix->width;
 812         h = pix->height;
 813
 814         if (fmt->fourcc == V4L2_PIX_FMT_JPEG) {
 815                 /* ignore userspaces's sizeimage for encoding */
 816                 if (pix->plane_fmt[0].sizeimage <= 0 || ctx->encoder)
 817                         pix->plane_fmt[0].sizeimage = JPU_JPEG_HDR_SIZE +
 818                                 (JPU_JPEG_MAX_BYTES_PER_PIXEL * w * h);
 819                 pix->plane_fmt[0].bytesperline = 0;
 820                 memset(pix->plane_fmt[0].reserved, 0,
 821                        sizeof(pix->plane_fmt[0].reserved));
 822         } else {
 823                 unsigned int i, bpl = 0;
 824
 825                 for (i = 0; i < pix->num_planes; ++i)
 826                         bpl = max(bpl, pix->plane_fmt[i].bytesperline);
 827
 828                 bpl = clamp_t(unsigned int, bpl, w, JPU_WIDTH_MAX);
 829                 bpl = round_up(bpl, JPU_MEMALIGN);
 830
 831                 for (i = 0; i < pix->num_planes; ++i) {
 832                         pix->plane_fmt[i].bytesperline = bpl;
 833                         pix->plane_fmt[i].sizeimage = bpl * h * fmt->bpp[i] / 8;
 834                         memset(pix->plane_fmt[i].reserved, 0,
 835                                sizeof(pix->plane_fmt[i].reserved));
 836                 }
 837         }
 838
 839         if (fmtinfo)
 840                 *fmtinfo = fmt;
 841
 842         return 0;
 843 }
 844
 845 static int jpu_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
 846 {
 847         struct jpu_ctx *ctx = fh_to_ctx(priv);
 848
 849         if (!v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type))
 850                 return -EINVAL;
 851
 852         return __jpu_try_fmt(ctx, NULL, &f->fmt.pix_mp, f->type);
 853 }
 854
 855 static int jpu_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
 856 {
 857         struct vb2_queue *vq;
 858         struct jpu_ctx *ctx = fh_to_ctx(priv);
 859         struct v4l2_m2m_ctx *m2m_ctx = ctx->fh.m2m_ctx;
 860         struct jpu_fmt *fmtinfo;
 861         struct jpu_q_data *q_data;
 862         int ret;
 863
 864         vq = v4l2_m2m_get_vq(m2m_ctx, f->type);
 865         if (!vq)
 866                 return -EINVAL;
 867
 868         if (vb2_is_busy(vq)) {
 869                 v4l2_err(&ctx->jpu->v4l2_dev, "%s queue busy\n", __func__);
 870                 return -EBUSY;
 871         }
 872
 873         ret = __jpu_try_fmt(ctx, &fmtinfo, &f->fmt.pix_mp, f->type);
 874         if (ret < 0)
 875                 return ret;
 876
 877         q_data = jpu_get_q_data(ctx, f->type);
 878
 879         q_data->format = f->fmt.pix_mp;
 880         q_data->fmtinfo = fmtinfo;
 881
 882         return 0;
 883 }
 884
 885 static int jpu_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 886 {
 887         struct jpu_q_data *q_data;
 888         struct jpu_ctx *ctx = fh_to_ctx(priv);
 889
 890         if (!v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type))
 891                 return -EINVAL;
 892
 893         q_data = jpu_get_q_data(ctx, f->type);
 894         f->fmt.pix_mp = q_data->format;
 895
 896         return 0;
 897 }
 898
 899 /*
 900  * V4L2 controls
 901  */
 902 static int jpu_s_ctrl(struct v4l2_ctrl *ctrl)
 903 {
 904         struct jpu_ctx *ctx = ctrl_to_ctx(ctrl);
 905         unsigned long flags;
 906
 907         spin_lock_irqsave(&ctx->jpu->lock, flags);
 908         if (ctrl->id == V4L2_CID_JPEG_COMPRESSION_QUALITY)
 909                 ctx->compr_quality = ctrl->val;
 910         spin_unlock_irqrestore(&ctx->jpu->lock, flags);
 911
 912         return 0;
 913 }
 914
 915 static const struct v4l2_ctrl_ops jpu_ctrl_ops = {
 916         .s_ctrl         = jpu_s_ctrl,
 917 };
 918
 919 static int jpu_streamon(struct file *file, void *priv, enum v4l2_buf_type type)
 920 {
 921         struct jpu_ctx *ctx = fh_to_ctx(priv);
 922         struct jpu_q_data *src_q_data, *dst_q_data, *orig, adj, *ref;
 923         enum v4l2_buf_type adj_type;
 924
 925         src_q_data = jpu_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
 926         dst_q_data = jpu_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
 927
 928         if (ctx->encoder) {
 929                 adj = *src_q_data;
 930                 orig = src_q_data;
 931                 ref = dst_q_data;
 932                 adj_type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 933         } else {
 934                 adj = *dst_q_data;
 935                 orig = dst_q_data;
 936                 ref = src_q_data;
 937                 adj_type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 938         }
 939
 940         adj.format.width = ref->format.width;
 941         adj.format.height = ref->format.height;
 942
 943         __jpu_try_fmt(ctx, NULL, &adj.format, adj_type);
 944
 945         if (adj.format.width != orig->format.width ||
 946             adj.format.height != orig->format.height) {
 947                 dev_err(ctx->jpu->dev, "src and dst formats do not match.\n");
 948                 /* maybe we can return -EPIPE here? */
 949                 return -EINVAL;
 950         }
 951
 952         return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
 953 }
 954
 955 static const struct v4l2_ioctl_ops jpu_ioctl_ops = {
 956         .vidioc_querycap                = jpu_querycap,
 957
 958         .vidioc_enum_fmt_vid_cap_mplane = jpu_enum_fmt_cap,
 959         .vidioc_enum_fmt_vid_out_mplane = jpu_enum_fmt_out,
 960         .vidioc_g_fmt_vid_cap_mplane    = jpu_g_fmt,
 961         .vidioc_g_fmt_vid_out_mplane    = jpu_g_fmt,
 962         .vidioc_try_fmt_vid_cap_mplane  = jpu_try_fmt,
 963         .vidioc_try_fmt_vid_out_mplane  = jpu_try_fmt,
 964         .vidioc_s_fmt_vid_cap_mplane    = jpu_s_fmt,
 965         .vidioc_s_fmt_vid_out_mplane    = jpu_s_fmt,
 966
 967         .vidioc_reqbufs                 = v4l2_m2m_ioctl_reqbufs,
 968         .vidioc_create_bufs             = v4l2_m2m_ioctl_create_bufs,
 969         .vidioc_querybuf                = v4l2_m2m_ioctl_querybuf,
 970         .vidioc_qbuf                    = v4l2_m2m_ioctl_qbuf,
 971         .vidioc_dqbuf                   = v4l2_m2m_ioctl_dqbuf,
 972         .vidioc_expbuf                  = v4l2_m2m_ioctl_expbuf,
 973
 974         .vidioc_streamon                = jpu_streamon,
 975         .vidioc_streamoff               = v4l2_m2m_ioctl_streamoff,
 976
 977         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 978         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe
 979 };
 980
 981 static int jpu_controls_create(struct jpu_ctx *ctx)
 982 {
 983         struct v4l2_ctrl *ctrl;
 984         int ret;
 985
 986         v4l2_ctrl_handler_init(&ctx->ctrl_handler, 1);
 987
 988         ctrl = v4l2_ctrl_new_std(&ctx->ctrl_handler, &jpu_ctrl_ops,
 989                                  V4L2_CID_JPEG_COMPRESSION_QUALITY,
 990                                  0, JPU_MAX_QUALITY - 1, 1, 0);
 991
 992         if (ctx->ctrl_handler.error) {
 993                 ret = ctx->ctrl_handler.error;
 994                 goto error_free;
 995         }
 996
 997         if (!ctx->encoder)
 998                 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE |
 999                                 V4L2_CTRL_FLAG_READ_ONLY;
1000
1001         ret = v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
1002         if (ret < 0)
1003                 goto error_free;
1004
1005         return 0;
1006
1007 error_free:
1008         v4l2_ctrl_handler_free(&ctx->ctrl_handler);
1009         return ret;
1010 }
1011
1012 /*
1013  * ============================================================================
1014  * Queue operations
1015  * ============================================================================
1016  */
1017 static int jpu_queue_setup(struct vb2_queue *vq,
1018                            const struct v4l2_format *fmt,
1019                            unsigned int *nbuffers, unsigned int *nplanes,
1020                            unsigned int sizes[], void *alloc_ctxs[])
1021 {
1022         struct jpu_ctx *ctx = vb2_get_drv_priv(vq);
1023         struct jpu_q_data *q_data;
1024         unsigned int i;
1025
1026         q_data = jpu_get_q_data(ctx, vq->type);
1027
1028         *nplanes = q_data->format.num_planes;
1029
1030         for (i = 0; i < *nplanes; i++) {
1031                 unsigned int q_size = q_data->format.plane_fmt[i].sizeimage;
1032                 unsigned int f_size = fmt ?
1033                         fmt->fmt.pix_mp.plane_fmt[i].sizeimage : 0;
1034
1035                 if (fmt && f_size < q_size)
1036                         return -EINVAL;
1037
1038                 sizes[i] = fmt ? f_size : q_size;
1039                 alloc_ctxs[i] = ctx->jpu->alloc_ctx;
1040         }
1041
1042         return 0;
1043 }
1044
1045 static int jpu_buf_prepare(struct vb2_buffer *vb)
1046 {
1047         struct jpu_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1048         struct jpu_q_data *q_data;
1049         unsigned int i;
1050
1051         q_data = jpu_get_q_data(ctx, vb->vb2_queue->type);
1052
1053         if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
1054                 if (vb->v4l2_buf.field == V4L2_FIELD_ANY)
1055                         vb->v4l2_buf.field = V4L2_FIELD_NONE;
1056                 if (vb->v4l2_buf.field != V4L2_FIELD_NONE) {
1057                         dev_err(ctx->jpu->dev, "%s field isn't supported\n",
1058                                         __func__);
1059                         return -EINVAL;
1060                 }
1061         }
1062
1063         for (i = 0; i < q_data->format.num_planes; i++) {
1064                 unsigned long size = q_data->format.plane_fmt[i].sizeimage;
1065
1066                 if (vb2_plane_size(vb, i) < size) {
1067                         dev_err(ctx->jpu->dev,
1068                                 "%s: data will not fit into plane (%lu < %lu)\n",
1069                                __func__, vb2_plane_size(vb, i), size);
1070                         return -EINVAL;
1071                 }
1072
1073                 /* decoder capture queue */
1074                 if (!ctx->encoder && !V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type))
1075                         vb2_set_plane_payload(vb, i, size);
1076         }
1077
1078         return 0;
1079 }
1080
1081 static void jpu_buf_queue(struct vb2_buffer *vb)
1082 {
1083         struct jpu_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1084
1085         if (!ctx->encoder && V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
1086                 struct jpu_buffer *jpu_buf = vb2_to_jpu_buffer(vb);
1087                 struct jpu_q_data *q_data, adjust;
1088                 void *buffer = vb2_plane_vaddr(vb, 0);
1089                 unsigned long buf_size = vb2_get_plane_payload(vb, 0);
1090                 unsigned int width, height;
1091
1092                 u8 subsampling = jpu_parse_hdr(buffer, buf_size, &width,
1093                                                  &height);
1094
1095                 /* check if JPEG data basic parsing was successful */
1096                 if (subsampling != JPU_JPEG_422 && subsampling != JPU_JPEG_420)
1097                         goto format_error;
1098
1099                 q_data = &ctx->out_q;
1100
1101                 adjust = *q_data;
1102                 adjust.format.width = width;
1103                 adjust.format.height = height;
1104
1105                 __jpu_try_fmt(ctx, &adjust.fmtinfo, &adjust.format,
1106                               V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
1107
1108                 if (adjust.format.width != q_data->format.width ||
1109                     adjust.format.height != q_data->format.height)
1110                         goto format_error;
1111
1112                 /*
1113                  * keep subsampling in buffer to check it
1114                  * for compatibility in device_run
1115                  */
1116                 jpu_buf->subsampling = subsampling;
1117         }
1118
1119         if (ctx->fh.m2m_ctx)
1120                 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb);
1121
1122         return;
1123
1124 format_error:
1125         dev_err(ctx->jpu->dev, "incompatible or corrupted JPEG data\n");
1126         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
1127 }
1128
1129 static void jpu_buf_finish(struct vb2_buffer *vb)
1130 {
1131         struct jpu_buffer *jpu_buf = vb2_to_jpu_buffer(vb);
1132         struct jpu_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1133         struct jpu_q_data *q_data = &ctx->out_q;
1134         enum v4l2_buf_type type = vb->vb2_queue->type;
1135         u8 *buffer;
1136
1137         if (vb->state == VB2_BUF_STATE_DONE)
1138                 vb->v4l2_buf.sequence = jpu_get_q_data(ctx, type)->sequence++;
1139
1140         if (!ctx->encoder || vb->state != VB2_BUF_STATE_DONE ||
1141             V4L2_TYPE_IS_OUTPUT(type))
1142                 return;
1143
1144         buffer = vb2_plane_vaddr(vb, 0);
1145
1146         memcpy(buffer, jpeg_hdrs[jpu_buf->compr_quality], JPU_JPEG_HDR_SIZE);
1147         *(u16 *)(buffer + JPU_JPEG_HEIGHT_OFFSET) =
1148                                         cpu_to_be16(q_data->format.height);
1149         *(u16 *)(buffer + JPU_JPEG_WIDTH_OFFSET) =
1150                                         cpu_to_be16(q_data->format.width);
1151         *(buffer + JPU_JPEG_SUBS_OFFSET) = q_data->fmtinfo->subsampling;
1152 }
1153
1154 static int jpu_start_streaming(struct vb2_queue *vq, unsigned count)
1155 {
1156         struct jpu_ctx *ctx = vb2_get_drv_priv(vq);
1157         struct jpu_q_data *q_data = jpu_get_q_data(ctx, vq->type);
1158
1159         q_data->sequence = 0;
1160         return 0;
1161 }
1162
1163 static void jpu_stop_streaming(struct vb2_queue *vq)
1164 {
1165         struct jpu_ctx *ctx = vb2_get_drv_priv(vq);
1166         struct vb2_buffer *vb;
1167         unsigned long flags;
1168
1169         for (;;) {
1170                 if (V4L2_TYPE_IS_OUTPUT(vq->type))
1171                         vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
1172                 else
1173                         vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
1174                 if (vb == NULL)
1175                         return;
1176                 spin_lock_irqsave(&ctx->jpu->lock, flags);
1177                 v4l2_m2m_buf_done(vb, VB2_BUF_STATE_ERROR);
1178                 spin_unlock_irqrestore(&ctx->jpu->lock, flags);
1179         }
1180 }
1181
1182 static struct vb2_ops jpu_qops = {
1183         .queue_setup            = jpu_queue_setup,
1184         .buf_prepare            = jpu_buf_prepare,
1185         .buf_queue              = jpu_buf_queue,
1186         .buf_finish             = jpu_buf_finish,
1187         .start_streaming        = jpu_start_streaming,
1188         .stop_streaming         = jpu_stop_streaming,
1189         .wait_prepare           = vb2_ops_wait_prepare,
1190         .wait_finish            = vb2_ops_wait_finish,
1191 };
1192
1193 static int jpu_queue_init(void *priv, struct vb2_queue *src_vq,
1194                           struct vb2_queue *dst_vq)
1195 {
1196         struct jpu_ctx *ctx = priv;
1197         int ret;
1198
1199         memset(src_vq, 0, sizeof(*src_vq));
1200         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
1201         src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
1202         src_vq->drv_priv = ctx;
1203         src_vq->buf_struct_size = sizeof(struct jpu_buffer);
1204         src_vq->ops = &jpu_qops;
1205         src_vq->mem_ops = &vb2_dma_contig_memops;
1206         src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1207         src_vq->lock = &ctx->jpu->mutex;
1208
1209         ret = vb2_queue_init(src_vq);
1210         if (ret)
1211                 return ret;
1212
1213         memset(dst_vq, 0, sizeof(*dst_vq));
1214         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1215         dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
1216         dst_vq->drv_priv = ctx;
1217         dst_vq->buf_struct_size = sizeof(struct jpu_buffer);
1218         dst_vq->ops = &jpu_qops;
1219         dst_vq->mem_ops = &vb2_dma_contig_memops;
1220         dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1221         dst_vq->lock = &ctx->jpu->mutex;
1222
1223         return vb2_queue_init(dst_vq);
1224 }
1225
1226 /*
1227  * ============================================================================
1228  * Device file operations
1229  * ============================================================================
1230  */
1231 static int jpu_open(struct file *file)
1232 {
1233         struct jpu *jpu = video_drvdata(file);
1234         struct video_device *vfd = video_devdata(file);
1235         struct jpu_ctx *ctx;
1236         int ret;
1237
1238         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1239         if (!ctx)
1240                 return -ENOMEM;
1241
1242         v4l2_fh_init(&ctx->fh, vfd);
1243         ctx->fh.ctrl_handler = &ctx->ctrl_handler;
1244         file->private_data = &ctx->fh;
1245         v4l2_fh_add(&ctx->fh);
1246
1247         ctx->jpu = jpu;
1248         ctx->encoder = vfd == &jpu->vfd_encoder;
1249
1250         __jpu_try_fmt(ctx, &ctx->out_q.fmtinfo, &ctx->out_q.format,
1251                       V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
1252         __jpu_try_fmt(ctx, &ctx->cap_q.fmtinfo, &ctx->cap_q.format,
1253                       V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
1254
1255         ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(jpu->m2m_dev, ctx, jpu_queue_init);
1256         if (IS_ERR(ctx->fh.m2m_ctx)) {
1257                 ret = PTR_ERR(ctx->fh.m2m_ctx);
1258                 goto v4l_prepare_rollback;
1259         }
1260
1261         ret = jpu_controls_create(ctx);
1262         if (ret < 0)
1263                 goto v4l_prepare_rollback;
1264
1265         if (mutex_lock_interruptible(&jpu->mutex)) {
1266                 ret = -ERESTARTSYS;
1267                 goto v4l_prepare_rollback;
1268         }
1269
1270         if (jpu->ref_count == 0) {
1271                 ret = clk_prepare_enable(jpu->clk);
1272                 if (ret < 0)
1273                         goto device_prepare_rollback;
1274                 /* ...issue software reset */
1275                 ret = jpu_reset(jpu);
1276                 if (ret)
1277                         goto device_prepare_rollback;
1278         }
1279
1280         jpu->ref_count++;
1281
1282         mutex_unlock(&jpu->mutex);
1283         return 0;
1284
1285 device_prepare_rollback:
1286         mutex_unlock(&jpu->mutex);
1287 v4l_prepare_rollback:
1288         v4l2_fh_del(&ctx->fh);
1289         v4l2_fh_exit(&ctx->fh);
1290         kfree(ctx);
1291         return ret;
1292 }
1293
1294 static int jpu_release(struct file *file)
1295 {
1296         struct jpu *jpu = video_drvdata(file);
1297         struct jpu_ctx *ctx = fh_to_ctx(file->private_data);
1298
1299         mutex_lock(&jpu->mutex);
1300         if (--jpu->ref_count == 0)
1301                 clk_disable_unprepare(jpu->clk);
1302         mutex_unlock(&jpu->mutex);
1303
1304         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1305         v4l2_ctrl_handler_free(&ctx->ctrl_handler);
1306         v4l2_fh_del(&ctx->fh);
1307         v4l2_fh_exit(&ctx->fh);
1308         kfree(ctx);
1309
1310         return 0;
1311 }
1312
1313 static const struct v4l2_file_operations jpu_fops = {
1314         .owner          = THIS_MODULE,
1315         .open           = jpu_open,
1316         .release        = jpu_release,
1317         .unlocked_ioctl = video_ioctl2,
1318         .poll           = v4l2_m2m_fop_poll,
1319         .mmap           = v4l2_m2m_fop_mmap,
1320 };
1321
1322 /*
1323  * ============================================================================
1324  * mem2mem callbacks
1325  * ============================================================================
1326  */
1327 static void jpu_cleanup(struct jpu_ctx *ctx, bool reset)
1328 {
1329         /* remove current buffers and finish job */
1330         struct vb2_buffer *src_buf, *dst_buf;
1331         unsigned long flags;
1332
1333         spin_lock_irqsave(&ctx->jpu->lock, flags);
1334
1335         src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
1336         dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
1337
1338         v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
1339         v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
1340
1341         /* ...and give it a chance on next run */
1342         if (reset)
1343                 jpu_write(ctx->jpu, JCCMD_SRST, JCCMD);
1344
1345         spin_unlock_irqrestore(&ctx->jpu->lock, flags);
1346
1347         v4l2_m2m_job_finish(ctx->jpu->m2m_dev, ctx->fh.m2m_ctx);
1348 }
1349
1350 static void jpu_device_run(void *priv)
1351 {
1352         struct jpu_ctx *ctx = priv;
1353         struct jpu *jpu = ctx->jpu;
1354         struct jpu_buffer *jpu_buf;
1355         struct jpu_q_data *q_data;
1356         struct vb2_buffer *src_buf, *dst_buf;
1357         unsigned int w, h, bpl;
1358         unsigned char num_planes, subsampling;
1359         unsigned long flags;
1360
1361         /* ...wait until module reset completes; we have mutex locked here */
1362         if (jpu_wait_reset(jpu)) {
1363                 jpu_cleanup(ctx, true);
1364                 return;
1365         }
1366
1367         spin_lock_irqsave(&ctx->jpu->lock, flags);
1368
1369         jpu->curr = ctx;
1370
1371         src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
1372         dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
1373
1374         if (ctx->encoder) {
1375                 jpu_buf = vb2_to_jpu_buffer(dst_buf);
1376                 q_data = &ctx->out_q;
1377         } else {
1378                 jpu_buf = vb2_to_jpu_buffer(src_buf);
1379                 q_data = &ctx->cap_q;
1380         }
1381
1382         w = q_data->format.width;
1383         h = q_data->format.height;
1384         bpl = q_data->format.plane_fmt[0].bytesperline;
1385         num_planes = q_data->fmtinfo->num_planes;
1386         subsampling = q_data->fmtinfo->subsampling;
1387
1388         if (ctx->encoder) {
1389                 unsigned long src_1_addr, src_2_addr, dst_addr;
1390                 unsigned int redu, inft;
1391
1392                 dst_addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
1393                 src_1_addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
1394                 if (num_planes > 1)
1395                         src_2_addr = vb2_dma_contig_plane_dma_addr(src_buf, 1);
1396                 else
1397                         src_2_addr = src_1_addr + w * h;
1398
1399                 jpu_buf->compr_quality = ctx->compr_quality;
1400
1401                 if (subsampling == JPU_JPEG_420) {
1402                         redu = JCMOD_REDU_420;
1403                         inft = JIFECNT_INFT_420;
1404                 } else {
1405                         redu = JCMOD_REDU_422;
1406                         inft = JIFECNT_INFT_422;
1407                 }
1408
1409                 /* only no marker mode works for encoding */
1410                 jpu_write(jpu, JCMOD_DSP_ENC | JCMOD_PCTR | redu |
1411                           JCMOD_MSKIP_ENABLE, JCMOD);
1412
1413                 jpu_write(jpu, JIFECNT_SWAP_WB | inft, JIFECNT);
1414                 jpu_write(jpu, JIFDCNT_SWAP_WB, JIFDCNT);
1415                 jpu_write(jpu, JINTE_TRANSF_COMPL, JINTE);
1416
1417                 /* Y and C components source addresses */
1418                 jpu_write(jpu, src_1_addr, JIFESYA1);
1419                 jpu_write(jpu, src_2_addr, JIFESCA1);
1420
1421                 /* memory width */
1422                 jpu_write(jpu, bpl, JIFESMW);
1423
1424                 jpu_write(jpu, (w >> 8) & JCSZ_MASK, JCHSZU);
1425                 jpu_write(jpu, w & JCSZ_MASK, JCHSZD);
1426
1427                 jpu_write(jpu, (h >> 8) & JCSZ_MASK, JCVSZU);
1428                 jpu_write(jpu, h & JCSZ_MASK, JCVSZD);
1429
1430                 jpu_write(jpu, w, JIFESHSZ);
1431                 jpu_write(jpu, h, JIFESVSZ);
1432
1433                 jpu_write(jpu, dst_addr + JPU_JPEG_HDR_SIZE, JIFEDA1);
1434
1435                 jpu_write(jpu, 0 << JCQTN_SHIFT(1) | 1 << JCQTN_SHIFT(2) |
1436                           1 << JCQTN_SHIFT(3), JCQTN);
1437
1438                 jpu_write(jpu, 0 << JCHTN_AC_SHIFT(1) | 0 << JCHTN_DC_SHIFT(1) |
1439                           1 << JCHTN_AC_SHIFT(2) | 1 << JCHTN_DC_SHIFT(2) |
1440                           1 << JCHTN_AC_SHIFT(3) | 1 << JCHTN_DC_SHIFT(3),
1441                           JCHTN);
1442
1443                 jpu_set_qtbl(jpu, ctx->compr_quality);
1444                 jpu_set_htbl(jpu);
1445         } else {
1446                 unsigned long src_addr, dst_1_addr, dst_2_addr;
1447
1448                 if (jpu_buf->subsampling != subsampling) {
1449                         dev_err(ctx->jpu->dev,
1450                                 "src and dst formats do not match.\n");
1451                         spin_unlock_irqrestore(&ctx->jpu->lock, flags);
1452                         jpu_cleanup(ctx, false);
1453                         return;
1454                 }
1455
1456                 src_addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
1457                 dst_1_addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
1458                 if (q_data->fmtinfo->num_planes > 1)
1459                         dst_2_addr = vb2_dma_contig_plane_dma_addr(dst_buf, 1);
1460                 else
1461                         dst_2_addr = dst_1_addr + w * h;
1462
1463                 /* ...set up decoder operation */
1464                 jpu_write(jpu, JCMOD_DSP_DEC | JCMOD_PCTR, JCMOD);
1465                 jpu_write(jpu, JIFECNT_SWAP_WB, JIFECNT);
1466                 jpu_write(jpu, JIFDCNT_SWAP_WB, JIFDCNT);
1467
1468                 /* ...enable interrupts on transfer completion and d-g error */
1469                 jpu_write(jpu, JINTE_TRANSF_COMPL | JINTE_ERR, JINTE);
1470
1471                 /* ...set source/destination addresses of encoded data */
1472                 jpu_write(jpu, src_addr, JIFDSA1);
1473                 jpu_write(jpu, dst_1_addr, JIFDDYA1);
1474                 jpu_write(jpu, dst_2_addr, JIFDDCA1);
1475
1476                 jpu_write(jpu, bpl, JIFDDMW);
1477         }
1478
1479         /* ...start encoder/decoder operation */
1480         jpu_write(jpu, JCCMD_JSRT, JCCMD);
1481
1482         spin_unlock_irqrestore(&ctx->jpu->lock, flags);
1483 }
1484
1485 static int jpu_job_ready(void *priv)
1486 {
1487         return 1;
1488 }
1489
1490 static void jpu_job_abort(void *priv)
1491 {
1492         struct jpu_ctx *ctx = priv;
1493
1494         if (!wait_event_timeout(ctx->jpu->irq_queue, !ctx->jpu->curr,
1495                                 msecs_to_jiffies(JPU_JOB_TIMEOUT)))
1496                 jpu_cleanup(ctx, true);
1497 }
1498
1499 static struct v4l2_m2m_ops jpu_m2m_ops = {
1500         .device_run     = jpu_device_run,
1501         .job_ready      = jpu_job_ready,
1502         .job_abort      = jpu_job_abort,
1503 };
1504
1505 /*
1506  * ============================================================================
1507  * IRQ handler
1508  * ============================================================================
1509  */
1510 static irqreturn_t jpu_irq_handler(int irq, void *dev_id)
1511 {
1512         struct jpu *jpu = dev_id;
1513         struct jpu_ctx *curr_ctx;
1514         struct vb2_buffer *src_buf, *dst_buf;
1515         unsigned int int_status;
1516
1517         int_status = jpu_read(jpu, JINTS);
1518
1519         /* ...spurious interrupt */
1520         if (!((JINTS_TRANSF_COMPL | JINTS_PROCESS_COMPL | JINTS_ERR) &
1521             int_status))
1522                 return IRQ_NONE;
1523
1524         /* ...clear interrupts */
1525         jpu_write(jpu, ~(int_status & JINTS_MASK), JINTS);
1526         if (int_status & (JINTS_ERR | JINTS_PROCESS_COMPL))
1527                 jpu_write(jpu, JCCMD_JEND, JCCMD);
1528
1529         spin_lock(&jpu->lock);
1530
1531         if ((int_status & JINTS_PROCESS_COMPL) &&
1532            !(int_status & JINTS_TRANSF_COMPL))
1533                 goto handled;
1534
1535         curr_ctx = v4l2_m2m_get_curr_priv(jpu->m2m_dev);
1536         if (!curr_ctx) {
1537                 /* ...instance is not running */
1538                 dev_err(jpu->dev, "no active context for m2m\n");
1539                 goto handled;
1540         }
1541
1542         src_buf = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
1543         dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
1544
1545         if (int_status & JINTS_TRANSF_COMPL) {
1546                 if (curr_ctx->encoder) {
1547                         unsigned long payload_size = jpu_read(jpu, JCDTCU) << 16
1548                                                    | jpu_read(jpu, JCDTCM) << 8
1549                                                    | jpu_read(jpu, JCDTCD);
1550                         vb2_set_plane_payload(dst_buf, 0,
1551                                 payload_size + JPU_JPEG_HDR_SIZE);
1552                 }
1553
1554                 dst_buf->v4l2_buf.field = src_buf->v4l2_buf.field;
1555                 dst_buf->v4l2_buf.timestamp = src_buf->v4l2_buf.timestamp;
1556                 if (src_buf->v4l2_buf.flags & V4L2_BUF_FLAG_TIMECODE)
1557                         dst_buf->v4l2_buf.timecode = src_buf->v4l2_buf.timecode;
1558                 dst_buf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
1559                 dst_buf->v4l2_buf.flags |= src_buf->v4l2_buf.flags &
1560                                         V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
1561                 dst_buf->v4l2_buf.flags = src_buf->v4l2_buf.flags &
1562                         (V4L2_BUF_FLAG_TIMECODE | V4L2_BUF_FLAG_KEYFRAME |
1563                          V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_BFRAME |
1564                          V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
1565
1566                 v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
1567                 v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
1568         } else if (int_status & JINTS_ERR) {
1569                 unsigned char error = jpu_read(jpu, JCDERR) & JCDERR_MASK;
1570
1571                 dev_dbg(jpu->dev, "processing error: %#X: %s\n", error,
1572                         error_to_text[error]);
1573
1574                 v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
1575                 v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
1576         }
1577
1578         jpu->curr = NULL;
1579
1580         /* ...reset JPU after completion */
1581         jpu_write(jpu, JCCMD_SRST, JCCMD);
1582         spin_unlock(&jpu->lock);
1583
1584         v4l2_m2m_job_finish(jpu->m2m_dev, curr_ctx->fh.m2m_ctx);
1585
1586         /* ...wakeup abort routine if needed */
1587         wake_up(&jpu->irq_queue);
1588
1589         return IRQ_HANDLED;
1590
1591 handled:
1592         spin_unlock(&jpu->lock);
1593         return IRQ_HANDLED;
1594 }
1595
1596 /*
1597  * ============================================================================
1598  * Driver basic infrastructure
1599  * ============================================================================
1600  */
1601 static const struct of_device_id jpu_dt_ids[] = {
1602         { .compatible = "renesas,jpu-r8a7790" }, /* H2 */
1603         { .compatible = "renesas,jpu-r8a7791" }, /* M2-W */
1604         { .compatible = "renesas,jpu-r8a7792" }, /* V2H */
1605         { .compatible = "renesas,jpu-r8a7793" }, /* M2-N */
1606         { },
1607 };
1608 MODULE_DEVICE_TABLE(of, jpu_dt_ids);
1609
1610 static int jpu_probe(struct platform_device *pdev)
1611 {
1612         struct jpu *jpu;
1613         struct resource *res;
1614         int ret;
1615         unsigned int i;
1616
1617         jpu = devm_kzalloc(&pdev->dev, sizeof(*jpu), GFP_KERNEL);
1618         if (!jpu)
1619                 return -ENOMEM;
1620
1621         init_waitqueue_head(&jpu->irq_queue);
1622         mutex_init(&jpu->mutex);
1623         spin_lock_init(&jpu->lock);
1624         jpu->dev = &pdev->dev;
1625
1626         /* memory-mapped registers */
1627         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1628         jpu->regs = devm_ioremap_resource(&pdev->dev, res);
1629         if (IS_ERR(jpu->regs))
1630                 return PTR_ERR(jpu->regs);
1631
1632         /* interrupt service routine registration */
1633         jpu->irq = ret = platform_get_irq(pdev, 0);
1634         if (ret < 0) {
1635                 dev_err(&pdev->dev, "cannot find IRQ\n");
1636                 return ret;
1637         }
1638
1639         ret = devm_request_irq(&pdev->dev, jpu->irq, jpu_irq_handler, 0,
1640                                dev_name(&pdev->dev), jpu);
1641         if (ret) {
1642                 dev_err(&pdev->dev, "cannot claim IRQ %d\n", jpu->irq);
1643                 return ret;
1644         }
1645
1646         /* clocks */
1647         jpu->clk = devm_clk_get(&pdev->dev, NULL);
1648         if (IS_ERR(jpu->clk)) {
1649                 dev_err(&pdev->dev, "cannot get clock\n");
1650                 return PTR_ERR(jpu->clk);
1651         }
1652
1653         /* v4l2 device */
1654         ret = v4l2_device_register(&pdev->dev, &jpu->v4l2_dev);
1655         if (ret) {
1656                 dev_err(&pdev->dev, "Failed to register v4l2 device\n");
1657                 return ret;
1658         }
1659
1660         /* mem2mem device */
1661         jpu->m2m_dev = v4l2_m2m_init(&jpu_m2m_ops);
1662         if (IS_ERR(jpu->m2m_dev)) {
1663                 v4l2_err(&jpu->v4l2_dev, "Failed to init mem2mem device\n");
1664                 ret = PTR_ERR(jpu->m2m_dev);
1665                 goto device_register_rollback;
1666         }
1667
1668         jpu->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1669         if (IS_ERR(jpu->alloc_ctx)) {
1670                 v4l2_err(&jpu->v4l2_dev, "Failed to init memory allocator\n");
1671                 ret = PTR_ERR(jpu->alloc_ctx);
1672                 goto m2m_init_rollback;
1673         }
1674
1675         /* fill in qantization and Huffman tables for encoder */
1676         for (i = 0; i < JPU_MAX_QUALITY; i++)
1677                 jpu_generate_hdr(i, (unsigned char *)jpeg_hdrs[i]);
1678
1679         strlcpy(jpu->vfd_encoder.name, DRV_NAME, sizeof(jpu->vfd_encoder.name));
1680         jpu->vfd_encoder.fops           = &jpu_fops;
1681         jpu->vfd_encoder.ioctl_ops      = &jpu_ioctl_ops;
1682         jpu->vfd_encoder.minor          = -1;
1683         jpu->vfd_encoder.release        = video_device_release_empty;
1684         jpu->vfd_encoder.lock           = &jpu->mutex;
1685         jpu->vfd_encoder.v4l2_dev       = &jpu->v4l2_dev;
1686         jpu->vfd_encoder.vfl_dir        = VFL_DIR_M2M;
1687
1688         ret = video_register_device(&jpu->vfd_encoder, VFL_TYPE_GRABBER, -1);
1689         if (ret) {
1690                 v4l2_err(&jpu->v4l2_dev, "Failed to register video device\n");
1691                 goto vb2_allocator_rollback;
1692         }
1693
1694         video_set_drvdata(&jpu->vfd_encoder, jpu);
1695
1696         strlcpy(jpu->vfd_decoder.name, DRV_NAME, sizeof(jpu->vfd_decoder.name));
1697         jpu->vfd_decoder.fops           = &jpu_fops;
1698         jpu->vfd_decoder.ioctl_ops      = &jpu_ioctl_ops;
1699         jpu->vfd_decoder.minor          = -1;
1700         jpu->vfd_decoder.release        = video_device_release_empty;
1701         jpu->vfd_decoder.lock           = &jpu->mutex;
1702         jpu->vfd_decoder.v4l2_dev       = &jpu->v4l2_dev;
1703         jpu->vfd_decoder.vfl_dir        = VFL_DIR_M2M;
1704
1705         ret = video_register_device(&jpu->vfd_decoder, VFL_TYPE_GRABBER, -1);
1706         if (ret) {
1707                 v4l2_err(&jpu->v4l2_dev, "Failed to register video device\n");
1708                 goto enc_vdev_register_rollback;
1709         }
1710
1711         video_set_drvdata(&jpu->vfd_decoder, jpu);
1712         platform_set_drvdata(pdev, jpu);
1713
1714         v4l2_info(&jpu->v4l2_dev, "encoder device registered as /dev/video%d\n",
1715                   jpu->vfd_encoder.num);
1716         v4l2_info(&jpu->v4l2_dev, "decoder device registered as /dev/video%d\n",
1717                   jpu->vfd_decoder.num);
1718
1719         return 0;
1720
1721 enc_vdev_register_rollback:
1722         video_unregister_device(&jpu->vfd_encoder);
1723
1724 vb2_allocator_rollback:
1725         vb2_dma_contig_cleanup_ctx(jpu->alloc_ctx);
1726
1727 m2m_init_rollback:
1728         v4l2_m2m_release(jpu->m2m_dev);
1729
1730 device_register_rollback:
1731         v4l2_device_unregister(&jpu->v4l2_dev);
1732
1733         return ret;
1734 }
1735
1736 static int jpu_remove(struct platform_device *pdev)
1737 {
1738         struct jpu *jpu = platform_get_drvdata(pdev);
1739
1740         video_unregister_device(&jpu->vfd_decoder);
1741         video_unregister_device(&jpu->vfd_encoder);
1742         vb2_dma_contig_cleanup_ctx(jpu->alloc_ctx);
1743         v4l2_m2m_release(jpu->m2m_dev);
1744         v4l2_device_unregister(&jpu->v4l2_dev);
1745
1746         return 0;
1747 }
1748
1749 #ifdef CONFIG_PM_SLEEP
1750 static int jpu_suspend(struct device *dev)
1751 {
1752         struct jpu *jpu = dev_get_drvdata(dev);
1753
1754         if (jpu->ref_count == 0)
1755                 return 0;
1756
1757         clk_disable_unprepare(jpu->clk);
1758
1759         return 0;
1760 }
1761
1762 static int jpu_resume(struct device *dev)
1763 {
1764         struct jpu *jpu = dev_get_drvdata(dev);
1765
1766         if (jpu->ref_count == 0)
1767                 return 0;
1768
1769         clk_prepare_enable(jpu->clk);
1770
1771         return 0;
1772 }
1773 #endif
1774
1775 static const struct dev_pm_ops jpu_pm_ops = {
1776         SET_SYSTEM_SLEEP_PM_OPS(jpu_suspend, jpu_resume)
1777 };
1778
1779 static struct platform_driver jpu_driver = {
1780         .probe = jpu_probe,
1781         .remove = jpu_remove,
1782         .driver = {
1783                 .of_match_table = jpu_dt_ids,
1784                 .name = DRV_NAME,
1785                 .pm = &jpu_pm_ops,
1786         },
1787 };
1788
1789 module_platform_driver(jpu_driver);
1790
1791 MODULE_ALIAS("platform:" DRV_NAME);
1792 MODULE_AUTHOR("Mikhail Ulianov <mikhail.ulyanov@cogentembedded.com>");
1793 MODULE_DESCRIPTION("Renesas R-Car JPEG processing unit driver");
1794 MODULE_LICENSE("GPL v2");