drivers/media/video/mx2_camera.c

   1 /*
   2  * V4L2 Driver for i.MX27/i.MX25 camera host
   3  *
   4  * Copyright (C) 2008, Sascha Hauer, Pengutronix
   5  * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography
   6  * Copyright (C) 2012, Javier Martin, Vista Silicon S.L.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/init.h>
  15 #include <linux/module.h>
  16 #include <linux/io.h>
  17 #include <linux/delay.h>
  18 #include <linux/slab.h>
  19 #include <linux/dma-mapping.h>
  20 #include <linux/errno.h>
  21 #include <linux/fs.h>
  22 #include <linux/gcd.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/kernel.h>
  25 #include <linux/math64.h>
  26 #include <linux/mm.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/time.h>
  29 #include <linux/device.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/mutex.h>
  32 #include <linux/clk.h>
  33
  34 #include <media/v4l2-common.h>
  35 #include <media/v4l2-dev.h>
  36 #include <media/videobuf2-core.h>
  37 #include <media/videobuf2-dma-contig.h>
  38 #include <media/soc_camera.h>
  39 #include <media/soc_mediabus.h>
  40
  41 #include <linux/videodev2.h>
  42
  43 #include <mach/mx2_cam.h>
  44 #include <mach/hardware.h>
  45
  46 #include <asm/dma.h>
  47
  48 #define MX2_CAM_DRV_NAME "mx2-camera"
  49 #define MX2_CAM_VERSION "0.0.6"
  50 #define MX2_CAM_DRIVER_DESCRIPTION "i.MX2x_Camera"
  51
  52 /* reset values */
  53 #define CSICR1_RESET_VAL        0x40000800
  54 #define CSICR2_RESET_VAL        0x0
  55 #define CSICR3_RESET_VAL        0x0
  56
  57 /* csi control reg 1 */
  58 #define CSICR1_SWAP16_EN        (1 << 31)
  59 #define CSICR1_EXT_VSYNC        (1 << 30)
  60 #define CSICR1_EOF_INTEN        (1 << 29)
  61 #define CSICR1_PRP_IF_EN        (1 << 28)
  62 #define CSICR1_CCIR_MODE        (1 << 27)
  63 #define CSICR1_COF_INTEN        (1 << 26)
  64 #define CSICR1_SF_OR_INTEN      (1 << 25)
  65 #define CSICR1_RF_OR_INTEN      (1 << 24)
  66 #define CSICR1_STATFF_LEVEL     (3 << 22)
  67 #define CSICR1_STATFF_INTEN     (1 << 21)
  68 #define CSICR1_RXFF_LEVEL(l)    (((l) & 3) << 19)       /* MX27 */
  69 #define CSICR1_FB2_DMA_INTEN    (1 << 20)               /* MX25 */
  70 #define CSICR1_FB1_DMA_INTEN    (1 << 19)               /* MX25 */
  71 #define CSICR1_RXFF_INTEN       (1 << 18)
  72 #define CSICR1_SOF_POL          (1 << 17)
  73 #define CSICR1_SOF_INTEN        (1 << 16)
  74 #define CSICR1_MCLKDIV(d)       (((d) & 0xF) << 12)
  75 #define CSICR1_HSYNC_POL        (1 << 11)
  76 #define CSICR1_CCIR_EN          (1 << 10)
  77 #define CSICR1_MCLKEN           (1 << 9)
  78 #define CSICR1_FCC              (1 << 8)
  79 #define CSICR1_PACK_DIR         (1 << 7)
  80 #define CSICR1_CLR_STATFIFO     (1 << 6)
  81 #define CSICR1_CLR_RXFIFO       (1 << 5)
  82 #define CSICR1_GCLK_MODE        (1 << 4)
  83 #define CSICR1_INV_DATA         (1 << 3)
  84 #define CSICR1_INV_PCLK         (1 << 2)
  85 #define CSICR1_REDGE            (1 << 1)
  86 #define CSICR1_FMT_MASK         (CSICR1_PACK_DIR | CSICR1_SWAP16_EN)
  87
  88 #define SHIFT_STATFF_LEVEL      22
  89 #define SHIFT_RXFF_LEVEL        19
  90 #define SHIFT_MCLKDIV           12
  91
  92 /* control reg 3 */
  93 #define CSICR3_FRMCNT           (0xFFFF << 16)
  94 #define CSICR3_FRMCNT_RST       (1 << 15)
  95 #define CSICR3_DMA_REFLASH_RFF  (1 << 14)
  96 #define CSICR3_DMA_REFLASH_SFF  (1 << 13)
  97 #define CSICR3_DMA_REQ_EN_RFF   (1 << 12)
  98 #define CSICR3_DMA_REQ_EN_SFF   (1 << 11)
  99 #define CSICR3_RXFF_LEVEL(l)    (((l) & 7) << 4)        /* MX25 */
 100 #define CSICR3_CSI_SUP          (1 << 3)
 101 #define CSICR3_ZERO_PACK_EN     (1 << 2)
 102 #define CSICR3_ECC_INT_EN       (1 << 1)
 103 #define CSICR3_ECC_AUTO_EN      (1 << 0)
 104
 105 #define SHIFT_FRMCNT            16
 106
 107 /* csi status reg */
 108 #define CSISR_SFF_OR_INT        (1 << 25)
 109 #define CSISR_RFF_OR_INT        (1 << 24)
 110 #define CSISR_STATFF_INT        (1 << 21)
 111 #define CSISR_DMA_TSF_FB2_INT   (1 << 20)       /* MX25 */
 112 #define CSISR_DMA_TSF_FB1_INT   (1 << 19)       /* MX25 */
 113 #define CSISR_RXFF_INT          (1 << 18)
 114 #define CSISR_EOF_INT           (1 << 17)
 115 #define CSISR_SOF_INT           (1 << 16)
 116 #define CSISR_F2_INT            (1 << 15)
 117 #define CSISR_F1_INT            (1 << 14)
 118 #define CSISR_COF_INT           (1 << 13)
 119 #define CSISR_ECC_INT           (1 << 1)
 120 #define CSISR_DRDY              (1 << 0)
 121
 122 #define CSICR1                  0x00
 123 #define CSICR2                  0x04
 124 #define CSISR                   (cpu_is_mx27() ? 0x08 : 0x18)
 125 #define CSISTATFIFO             0x0c
 126 #define CSIRFIFO                0x10
 127 #define CSIRXCNT                0x14
 128 #define CSICR3                  (cpu_is_mx27() ? 0x1C : 0x08)
 129 #define CSIDMASA_STATFIFO       0x20
 130 #define CSIDMATA_STATFIFO       0x24
 131 #define CSIDMASA_FB1            0x28
 132 #define CSIDMASA_FB2            0x2c
 133 #define CSIFBUF_PARA            0x30
 134 #define CSIIMAG_PARA            0x34
 135
 136 /* EMMA PrP */
 137 #define PRP_CNTL                        0x00
 138 #define PRP_INTR_CNTL                   0x04
 139 #define PRP_INTRSTATUS                  0x08
 140 #define PRP_SOURCE_Y_PTR                0x0c
 141 #define PRP_SOURCE_CB_PTR               0x10
 142 #define PRP_SOURCE_CR_PTR               0x14
 143 #define PRP_DEST_RGB1_PTR               0x18
 144 #define PRP_DEST_RGB2_PTR               0x1c
 145 #define PRP_DEST_Y_PTR                  0x20
 146 #define PRP_DEST_CB_PTR                 0x24
 147 #define PRP_DEST_CR_PTR                 0x28
 148 #define PRP_SRC_FRAME_SIZE              0x2c
 149 #define PRP_DEST_CH1_LINE_STRIDE        0x30
 150 #define PRP_SRC_PIXEL_FORMAT_CNTL       0x34
 151 #define PRP_CH1_PIXEL_FORMAT_CNTL       0x38
 152 #define PRP_CH1_OUT_IMAGE_SIZE          0x3c
 153 #define PRP_CH2_OUT_IMAGE_SIZE          0x40
 154 #define PRP_SRC_LINE_STRIDE             0x44
 155 #define PRP_CSC_COEF_012                0x48
 156 #define PRP_CSC_COEF_345                0x4c
 157 #define PRP_CSC_COEF_678                0x50
 158 #define PRP_CH1_RZ_HORI_COEF1           0x54
 159 #define PRP_CH1_RZ_HORI_COEF2           0x58
 160 #define PRP_CH1_RZ_HORI_VALID           0x5c
 161 #define PRP_CH1_RZ_VERT_COEF1           0x60
 162 #define PRP_CH1_RZ_VERT_COEF2           0x64
 163 #define PRP_CH1_RZ_VERT_VALID           0x68
 164 #define PRP_CH2_RZ_HORI_COEF1           0x6c
 165 #define PRP_CH2_RZ_HORI_COEF2           0x70
 166 #define PRP_CH2_RZ_HORI_VALID           0x74
 167 #define PRP_CH2_RZ_VERT_COEF1           0x78
 168 #define PRP_CH2_RZ_VERT_COEF2           0x7c
 169 #define PRP_CH2_RZ_VERT_VALID           0x80
 170
 171 #define PRP_CNTL_CH1EN          (1 << 0)
 172 #define PRP_CNTL_CH2EN          (1 << 1)
 173 #define PRP_CNTL_CSIEN          (1 << 2)
 174 #define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
 175 #define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
 176 #define PRP_CNTL_DATA_IN_RGB16  (2 << 3)
 177 #define PRP_CNTL_DATA_IN_RGB32  (3 << 3)
 178 #define PRP_CNTL_CH1_OUT_RGB8   (0 << 5)
 179 #define PRP_CNTL_CH1_OUT_RGB16  (1 << 5)
 180 #define PRP_CNTL_CH1_OUT_RGB32  (2 << 5)
 181 #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
 182 #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
 183 #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
 184 #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
 185 #define PRP_CNTL_CH1_LEN        (1 << 9)
 186 #define PRP_CNTL_CH2_LEN        (1 << 10)
 187 #define PRP_CNTL_SKIP_FRAME     (1 << 11)
 188 #define PRP_CNTL_SWRST          (1 << 12)
 189 #define PRP_CNTL_CLKEN          (1 << 13)
 190 #define PRP_CNTL_WEN            (1 << 14)
 191 #define PRP_CNTL_CH1BYP         (1 << 15)
 192 #define PRP_CNTL_IN_TSKIP(x)    ((x) << 16)
 193 #define PRP_CNTL_CH1_TSKIP(x)   ((x) << 19)
 194 #define PRP_CNTL_CH2_TSKIP(x)   ((x) << 22)
 195 #define PRP_CNTL_INPUT_FIFO_LEVEL(x)    ((x) << 25)
 196 #define PRP_CNTL_RZ_FIFO_LEVEL(x)       ((x) << 27)
 197 #define PRP_CNTL_CH2B1EN        (1 << 29)
 198 #define PRP_CNTL_CH2B2EN        (1 << 30)
 199 #define PRP_CNTL_CH2FEN         (1 << 31)
 200
 201 /* IRQ Enable and status register */
 202 #define PRP_INTR_RDERR          (1 << 0)
 203 #define PRP_INTR_CH1WERR        (1 << 1)
 204 #define PRP_INTR_CH2WERR        (1 << 2)
 205 #define PRP_INTR_CH1FC          (1 << 3)
 206 #define PRP_INTR_CH2FC          (1 << 5)
 207 #define PRP_INTR_LBOVF          (1 << 7)
 208 #define PRP_INTR_CH2OVF         (1 << 8)
 209
 210 /* Resizing registers */
 211 #define PRP_RZ_VALID_TBL_LEN(x) ((x) << 24)
 212 #define PRP_RZ_VALID_BILINEAR   (1 << 31)
 213
 214 #define MAX_VIDEO_MEM   16
 215
 216 #define RESIZE_NUM_MIN  1
 217 #define RESIZE_NUM_MAX  20
 218 #define BC_COEF         3
 219 #define SZ_COEF         (1 << BC_COEF)
 220
 221 #define RESIZE_DIR_H    0
 222 #define RESIZE_DIR_V    1
 223
 224 #define RESIZE_ALGO_BILINEAR 0
 225 #define RESIZE_ALGO_AVERAGING 1
 226
 227 struct mx2_prp_cfg {
 228         int channel;
 229         u32 in_fmt;
 230         u32 out_fmt;
 231         u32 src_pixel;
 232         u32 ch1_pixel;
 233         u32 irq_flags;
 234         u32 csicr1;
 235 };
 236
 237 /* prp resizing parameters */
 238 struct emma_prp_resize {
 239         int             algo; /* type of algorithm used */
 240         int             len; /* number of coefficients */
 241         unsigned char   s[RESIZE_NUM_MAX]; /* table of coefficients */
 242 };
 243
 244 /* prp configuration for a client-host fmt pair */
 245 struct mx2_fmt_cfg {
 246         enum v4l2_mbus_pixelcode        in_fmt;
 247         u32                             out_fmt;
 248         struct mx2_prp_cfg              cfg;
 249 };
 250
 251 enum mx2_buffer_state {
 252         MX2_STATE_QUEUED,
 253         MX2_STATE_ACTIVE,
 254         MX2_STATE_DONE,
 255 };
 256
 257 struct mx2_buf_internal {
 258         struct list_head        queue;
 259         int                     bufnum;
 260         bool                    discard;
 261 };
 262
 263 /* buffer for one video frame */
 264 struct mx2_buffer {
 265         /* common v4l buffer stuff -- must be first */
 266         struct vb2_buffer               vb;
 267         enum mx2_buffer_state           state;
 268         struct mx2_buf_internal         internal;
 269 };
 270
 271 struct mx2_camera_dev {
 272         struct device           *dev;
 273         struct soc_camera_host  soc_host;
 274         struct soc_camera_device *icd;
 275         struct clk              *clk_csi, *clk_emma_ahb, *clk_emma_ipg;
 276
 277         unsigned int            irq_csi, irq_emma;
 278         void __iomem            *base_csi, *base_emma;
 279         unsigned long           base_dma;
 280
 281         struct mx2_camera_platform_data *pdata;
 282         struct resource         *res_csi, *res_emma;
 283         unsigned long           platform_flags;
 284
 285         struct list_head        capture;
 286         struct list_head        active_bufs;
 287         struct list_head        discard;
 288
 289         spinlock_t              lock;
 290
 291         int                     dma;
 292         struct mx2_buffer       *active;
 293         struct mx2_buffer       *fb1_active;
 294         struct mx2_buffer       *fb2_active;
 295
 296         u32                     csicr1;
 297
 298         struct mx2_buf_internal buf_discard[2];
 299         void                    *discard_buffer;
 300         dma_addr_t              discard_buffer_dma;
 301         size_t                  discard_size;
 302         struct mx2_fmt_cfg      *emma_prp;
 303         struct emma_prp_resize  resizing[2];
 304         unsigned int            s_width, s_height;
 305         u32                     frame_count;
 306         struct vb2_alloc_ctx    *alloc_ctx;
 307 };
 308
 309 static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
 310 {
 311         return container_of(int_buf, struct mx2_buffer, internal);
 312 }
 313
 314 static struct mx2_fmt_cfg mx27_emma_prp_table[] = {
 315         /*
 316          * This is a generic configuration which is valid for most
 317          * prp input-output format combinations.
 318          * We set the incomming and outgoing pixelformat to a
 319          * 16 Bit wide format and adjust the bytesperline
 320          * accordingly. With this configuration the inputdata
 321          * will not be changed by the emma and could be any type
 322          * of 16 Bit Pixelformat.
 323          */
 324         {
 325                 .in_fmt         = 0,
 326                 .out_fmt        = 0,
 327                 .cfg            = {
 328                         .channel        = 1,
 329                         .in_fmt         = PRP_CNTL_DATA_IN_RGB16,
 330                         .out_fmt        = PRP_CNTL_CH1_OUT_RGB16,
 331                         .src_pixel      = 0x2ca00565, /* RGB565 */
 332                         .ch1_pixel      = 0x2ca00565, /* RGB565 */
 333                         .irq_flags      = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
 334                                                 PRP_INTR_CH1FC | PRP_INTR_LBOVF,
 335                         .csicr1         = 0,
 336                 }
 337         },
 338         {
 339                 .in_fmt         = V4L2_MBUS_FMT_YUYV8_2X8,
 340                 .out_fmt        = V4L2_PIX_FMT_YUV420,
 341                 .cfg            = {
 342                         .channel        = 2,
 343                         .in_fmt         = PRP_CNTL_DATA_IN_YUV422,
 344                         .out_fmt        = PRP_CNTL_CH2_OUT_YUV420,
 345                         .src_pixel      = 0x22000888, /* YUV422 (YUYV) */
 346                         .irq_flags      = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
 347                                         PRP_INTR_CH2FC | PRP_INTR_LBOVF |
 348                                         PRP_INTR_CH2OVF,
 349                         .csicr1         = CSICR1_PACK_DIR,
 350                 }
 351         },
 352         {
 353                 .in_fmt         = V4L2_MBUS_FMT_UYVY8_2X8,
 354                 .out_fmt        = V4L2_PIX_FMT_YUV420,
 355                 .cfg            = {
 356                         .channel        = 2,
 357                         .in_fmt         = PRP_CNTL_DATA_IN_YUV422,
 358                         .out_fmt        = PRP_CNTL_CH2_OUT_YUV420,
 359                         .src_pixel      = 0x22000888, /* YUV422 (YUYV) */
 360                         .irq_flags      = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
 361                                         PRP_INTR_CH2FC | PRP_INTR_LBOVF |
 362                                         PRP_INTR_CH2OVF,
 363                         .csicr1         = CSICR1_SWAP16_EN,
 364                 }
 365         },
 366 };
 367
 368 static struct mx2_fmt_cfg *mx27_emma_prp_get_format(
 369                                         enum v4l2_mbus_pixelcode in_fmt,
 370                                         u32 out_fmt)
 371 {
 372         int i;
 373
 374         for (i = 1; i < ARRAY_SIZE(mx27_emma_prp_table); i++)
 375                 if ((mx27_emma_prp_table[i].in_fmt == in_fmt) &&
 376                                 (mx27_emma_prp_table[i].out_fmt == out_fmt)) {
 377                         return &mx27_emma_prp_table[i];
 378                 }
 379         /* If no match return the most generic configuration */
 380         return &mx27_emma_prp_table[0];
 381 };
 382
 383 static void mx27_update_emma_buf(struct mx2_camera_dev *pcdev,
 384                                  unsigned long phys, int bufnum)
 385 {
 386         struct mx2_fmt_cfg *prp = pcdev->emma_prp;
 387
 388         if (prp->cfg.channel == 1) {
 389                 writel(phys, pcdev->base_emma +
 390                                 PRP_DEST_RGB1_PTR + 4 * bufnum);
 391         } else {
 392                 writel(phys, pcdev->base_emma +
 393                         PRP_DEST_Y_PTR - 0x14 * bufnum);
 394                 if (prp->out_fmt == V4L2_PIX_FMT_YUV420) {
 395                         u32 imgsize = pcdev->icd->user_height *
 396                                         pcdev->icd->user_width;
 397
 398                         writel(phys + imgsize, pcdev->base_emma +
 399                                 PRP_DEST_CB_PTR - 0x14 * bufnum);
 400                         writel(phys + ((5 * imgsize) / 4), pcdev->base_emma +
 401                                 PRP_DEST_CR_PTR - 0x14 * bufnum);
 402                 }
 403         }
 404 }
 405
 406 static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
 407 {
 408         unsigned long flags;
 409
 410         clk_disable_unprepare(pcdev->clk_csi);
 411         writel(0, pcdev->base_csi + CSICR1);
 412         if (cpu_is_mx27()) {
 413                 writel(0, pcdev->base_emma + PRP_CNTL);
 414         } else if (cpu_is_mx25()) {
 415                 spin_lock_irqsave(&pcdev->lock, flags);
 416                 pcdev->fb1_active = NULL;
 417                 pcdev->fb2_active = NULL;
 418                 writel(0, pcdev->base_csi + CSIDMASA_FB1);
 419                 writel(0, pcdev->base_csi + CSIDMASA_FB2);
 420                 spin_unlock_irqrestore(&pcdev->lock, flags);
 421         }
 422 }
 423
 424 /*
 425  * The following two functions absolutely depend on the fact, that
 426  * there can be only one camera on mx2 camera sensor interface
 427  */
 428 static int mx2_camera_add_device(struct soc_camera_device *icd)
 429 {
 430         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 431         struct mx2_camera_dev *pcdev = ici->priv;
 432         int ret;
 433         u32 csicr1;
 434
 435         if (pcdev->icd)
 436                 return -EBUSY;
 437
 438         ret = clk_prepare_enable(pcdev->clk_csi);
 439         if (ret < 0)
 440                 return ret;
 441
 442         csicr1 = CSICR1_MCLKEN;
 443
 444         if (cpu_is_mx27()) {
 445                 csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
 446                         CSICR1_RXFF_LEVEL(0);
 447         } else if (cpu_is_mx27())
 448                 csicr1 |= CSICR1_SOF_INTEN | CSICR1_RXFF_LEVEL(2);
 449
 450         pcdev->csicr1 = csicr1;
 451         writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
 452
 453         pcdev->icd = icd;
 454         pcdev->frame_count = 0;
 455
 456         dev_info(icd->parent, "Camera driver attached to camera %d\n",
 457                  icd->devnum);
 458
 459         return 0;
 460 }
 461
 462 static void mx2_camera_remove_device(struct soc_camera_device *icd)
 463 {
 464         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 465         struct mx2_camera_dev *pcdev = ici->priv;
 466
 467         BUG_ON(icd != pcdev->icd);
 468
 469         dev_info(icd->parent, "Camera driver detached from camera %d\n",
 470                  icd->devnum);
 471
 472         mx2_camera_deactivate(pcdev);
 473
 474         pcdev->icd = NULL;
 475 }
 476
 477 static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb,
 478                 int state)
 479 {
 480         struct vb2_buffer *vb;
 481         struct mx2_buffer *buf;
 482         struct mx2_buffer **fb_active = fb == 1 ? &pcdev->fb1_active :
 483                 &pcdev->fb2_active;
 484         u32 fb_reg = fb == 1 ? CSIDMASA_FB1 : CSIDMASA_FB2;
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&pcdev->lock, flags);
 488
 489         if (*fb_active == NULL)
 490                 goto out;
 491
 492         vb = &(*fb_active)->vb;
 493         dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 494                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 495
 496         do_gettimeofday(&vb->v4l2_buf.timestamp);
 497         vb->v4l2_buf.sequence++;
 498         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 499
 500         if (list_empty(&pcdev->capture)) {
 501                 buf = NULL;
 502                 writel(0, pcdev->base_csi + fb_reg);
 503         } else {
 504                 buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
 505                                 internal.queue);
 506                 vb = &buf->vb;
 507                 list_del(&buf->internal.queue);
 508                 buf->state = MX2_STATE_ACTIVE;
 509                 writel(vb2_dma_contig_plane_dma_addr(vb, 0),
 510                        pcdev->base_csi + fb_reg);
 511         }
 512
 513         *fb_active = buf;
 514
 515 out:
 516         spin_unlock_irqrestore(&pcdev->lock, flags);
 517 }
 518
 519 static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
 520 {
 521         struct mx2_camera_dev *pcdev = data;
 522         u32 status = readl(pcdev->base_csi + CSISR);
 523
 524         if (status & CSISR_DMA_TSF_FB1_INT)
 525                 mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
 526         else if (status & CSISR_DMA_TSF_FB2_INT)
 527                 mx25_camera_frame_done(pcdev, 2, MX2_STATE_DONE);
 528
 529         /* FIXME: handle CSISR_RFF_OR_INT */
 530
 531         writel(status, pcdev->base_csi + CSISR);
 532
 533         return IRQ_HANDLED;
 534 }
 535
 536 /*
 537  *  Videobuf operations
 538  */
 539 static int mx2_videobuf_setup(struct vb2_queue *vq,
 540                         const struct v4l2_format *fmt,
 541                         unsigned int *count, unsigned int *num_planes,
 542                         unsigned int sizes[], void *alloc_ctxs[])
 543 {
 544         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 545         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 546         struct mx2_camera_dev *pcdev = ici->priv;
 547
 548         dev_dbg(icd->parent, "count=%d, size=%d\n", *count, sizes[0]);
 549
 550         /* TODO: support for VIDIOC_CREATE_BUFS not ready */
 551         if (fmt != NULL)
 552                 return -ENOTTY;
 553
 554         alloc_ctxs[0] = pcdev->alloc_ctx;
 555
 556         sizes[0] = icd->sizeimage;
 557
 558         if (0 == *count)
 559                 *count = 32;
 560         if (!*num_planes &&
 561             sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024)
 562                 *count = (MAX_VIDEO_MEM * 1024 * 1024) / sizes[0];
 563
 564         *num_planes = 1;
 565
 566         return 0;
 567 }
 568
 569 static int mx2_videobuf_prepare(struct vb2_buffer *vb)
 570 {
 571         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 572         int ret = 0;
 573
 574         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 575                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 576
 577 #ifdef DEBUG
 578         /*
 579          * This can be useful if you want to see if we actually fill
 580          * the buffer with something
 581          */
 582         memset((void *)vb2_plane_vaddr(vb, 0),
 583                0xaa, vb2_get_plane_payload(vb, 0));
 584 #endif
 585
 586         vb2_set_plane_payload(vb, 0, icd->sizeimage);
 587         if (vb2_plane_vaddr(vb, 0) &&
 588             vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) {
 589                 ret = -EINVAL;
 590                 goto out;
 591         }
 592
 593         return 0;
 594
 595 out:
 596         return ret;
 597 }
 598
 599 static void mx2_videobuf_queue(struct vb2_buffer *vb)
 600 {
 601         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 602         struct soc_camera_host *ici =
 603                 to_soc_camera_host(icd->parent);
 604         struct mx2_camera_dev *pcdev = ici->priv;
 605         struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb);
 606         unsigned long flags;
 607
 608         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 609                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 610
 611         spin_lock_irqsave(&pcdev->lock, flags);
 612
 613         buf->state = MX2_STATE_QUEUED;
 614         list_add_tail(&buf->internal.queue, &pcdev->capture);
 615
 616         if (cpu_is_mx25()) {
 617                 u32 csicr3, dma_inten = 0;
 618
 619                 if (pcdev->fb1_active == NULL) {
 620                         writel(vb2_dma_contig_plane_dma_addr(vb, 0),
 621                                         pcdev->base_csi + CSIDMASA_FB1);
 622                         pcdev->fb1_active = buf;
 623                         dma_inten = CSICR1_FB1_DMA_INTEN;
 624                 } else if (pcdev->fb2_active == NULL) {
 625                         writel(vb2_dma_contig_plane_dma_addr(vb, 0),
 626                                         pcdev->base_csi + CSIDMASA_FB2);
 627                         pcdev->fb2_active = buf;
 628                         dma_inten = CSICR1_FB2_DMA_INTEN;
 629                 }
 630
 631                 if (dma_inten) {
 632                         list_del(&buf->internal.queue);
 633                         buf->state = MX2_STATE_ACTIVE;
 634
 635                         csicr3 = readl(pcdev->base_csi + CSICR3);
 636
 637                         /* Reflash DMA */
 638                         writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
 639                                         pcdev->base_csi + CSICR3);
 640
 641                         /* clear & enable interrupts */
 642                         writel(dma_inten, pcdev->base_csi + CSISR);
 643                         pcdev->csicr1 |= dma_inten;
 644                         writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
 645
 646                         /* enable DMA */
 647                         csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
 648                         writel(csicr3, pcdev->base_csi + CSICR3);
 649                 }
 650         }
 651
 652         spin_unlock_irqrestore(&pcdev->lock, flags);
 653 }
 654
 655 static void mx2_videobuf_release(struct vb2_buffer *vb)
 656 {
 657         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 658         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 659         struct mx2_camera_dev *pcdev = ici->priv;
 660         struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb);
 661         unsigned long flags;
 662
 663 #ifdef DEBUG
 664         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 665                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 666
 667         switch (buf->state) {
 668         case MX2_STATE_ACTIVE:
 669                 dev_info(icd->parent, "%s (active)\n", __func__);
 670                 break;
 671         case MX2_STATE_QUEUED:
 672                 dev_info(icd->parent, "%s (queued)\n", __func__);
 673                 break;
 674         default:
 675                 dev_info(icd->parent, "%s (unknown) %d\n", __func__,
 676                                 buf->state);
 677                 break;
 678         }
 679 #endif
 680
 681         /*
 682          * Terminate only queued but inactive buffers. Active buffers are
 683          * released when they become inactive after videobuf_waiton().
 684          *
 685          * FIXME: implement forced termination of active buffers for mx27 and
 686          * mx27 eMMA, so that the user won't get stuck in an uninterruptible
 687          * state. This requires a specific handling for each of the these DMA
 688          * types.
 689          */
 690
 691         spin_lock_irqsave(&pcdev->lock, flags);
 692         if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
 693                 if (pcdev->fb1_active == buf) {
 694                         pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
 695                         writel(0, pcdev->base_csi + CSIDMASA_FB1);
 696                         pcdev->fb1_active = NULL;
 697                 } else if (pcdev->fb2_active == buf) {
 698                         pcdev->csicr1 &= ~CSICR1_FB2_DMA_INTEN;
 699                         writel(0, pcdev->base_csi + CSIDMASA_FB2);
 700                         pcdev->fb2_active = NULL;
 701                 }
 702                 writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
 703         }
 704         spin_unlock_irqrestore(&pcdev->lock, flags);
 705 }
 706
 707 static void mx27_camera_emma_buf_init(struct soc_camera_device *icd,
 708                 int bytesperline)
 709 {
 710         struct soc_camera_host *ici =
 711                 to_soc_camera_host(icd->parent);
 712         struct mx2_camera_dev *pcdev = ici->priv;
 713         struct mx2_fmt_cfg *prp = pcdev->emma_prp;
 714
 715         writel((pcdev->s_width << 16) | pcdev->s_height,
 716                pcdev->base_emma + PRP_SRC_FRAME_SIZE);
 717         writel(prp->cfg.src_pixel,
 718                pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL);
 719         if (prp->cfg.channel == 1) {
 720                 writel((icd->user_width << 16) | icd->user_height,
 721                         pcdev->base_emma + PRP_CH1_OUT_IMAGE_SIZE);
 722                 writel(bytesperline,
 723                         pcdev->base_emma + PRP_DEST_CH1_LINE_STRIDE);
 724                 writel(prp->cfg.ch1_pixel,
 725                         pcdev->base_emma + PRP_CH1_PIXEL_FORMAT_CNTL);
 726         } else { /* channel 2 */
 727                 writel((icd->user_width << 16) | icd->user_height,
 728                         pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
 729         }
 730
 731         /* Enable interrupts */
 732         writel(prp->cfg.irq_flags, pcdev->base_emma + PRP_INTR_CNTL);
 733 }
 734
 735 static void mx2_prp_resize_commit(struct mx2_camera_dev *pcdev)
 736 {
 737         int dir;
 738
 739         for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
 740                 unsigned char *s = pcdev->resizing[dir].s;
 741                 int len = pcdev->resizing[dir].len;
 742                 unsigned int coeff[2] = {0, 0};
 743                 unsigned int valid  = 0;
 744                 int i;
 745
 746                 if (len == 0)
 747                         continue;
 748
 749                 for (i = RESIZE_NUM_MAX - 1; i >= 0; i--) {
 750                         int j;
 751
 752                         j = i > 9 ? 1 : 0;
 753                         coeff[j] = (coeff[j] << BC_COEF) |
 754                                         (s[i] & (SZ_COEF - 1));
 755
 756                         if (i == 5 || i == 15)
 757                                 coeff[j] <<= 1;
 758
 759                         valid = (valid << 1) | (s[i] >> BC_COEF);
 760                 }
 761
 762                 valid |= PRP_RZ_VALID_TBL_LEN(len);
 763
 764                 if (pcdev->resizing[dir].algo == RESIZE_ALGO_BILINEAR)
 765                         valid |= PRP_RZ_VALID_BILINEAR;
 766
 767                 if (pcdev->emma_prp->cfg.channel == 1) {
 768                         if (dir == RESIZE_DIR_H) {
 769                                 writel(coeff[0], pcdev->base_emma +
 770                                                         PRP_CH1_RZ_HORI_COEF1);
 771                                 writel(coeff[1], pcdev->base_emma +
 772                                                         PRP_CH1_RZ_HORI_COEF2);
 773                                 writel(valid, pcdev->base_emma +
 774                                                         PRP_CH1_RZ_HORI_VALID);
 775                         } else {
 776                                 writel(coeff[0], pcdev->base_emma +
 777                                                         PRP_CH1_RZ_VERT_COEF1);
 778                                 writel(coeff[1], pcdev->base_emma +
 779                                                         PRP_CH1_RZ_VERT_COEF2);
 780                                 writel(valid, pcdev->base_emma +
 781                                                         PRP_CH1_RZ_VERT_VALID);
 782                         }
 783                 } else {
 784                         if (dir == RESIZE_DIR_H) {
 785                                 writel(coeff[0], pcdev->base_emma +
 786                                                         PRP_CH2_RZ_HORI_COEF1);
 787                                 writel(coeff[1], pcdev->base_emma +
 788                                                         PRP_CH2_RZ_HORI_COEF2);
 789                                 writel(valid, pcdev->base_emma +
 790                                                         PRP_CH2_RZ_HORI_VALID);
 791                         } else {
 792                                 writel(coeff[0], pcdev->base_emma +
 793                                                         PRP_CH2_RZ_VERT_COEF1);
 794                                 writel(coeff[1], pcdev->base_emma +
 795                                                         PRP_CH2_RZ_VERT_COEF2);
 796                                 writel(valid, pcdev->base_emma +
 797                                                         PRP_CH2_RZ_VERT_VALID);
 798                         }
 799                 }
 800         }
 801 }
 802
 803 static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
 804 {
 805         struct soc_camera_device *icd = soc_camera_from_vb2q(q);
 806         struct soc_camera_host *ici =
 807                 to_soc_camera_host(icd->parent);
 808         struct mx2_camera_dev *pcdev = ici->priv;
 809         struct mx2_fmt_cfg *prp = pcdev->emma_prp;
 810         struct vb2_buffer *vb;
 811         struct mx2_buffer *buf;
 812         unsigned long phys;
 813         int bytesperline;
 814
 815         if (cpu_is_mx27()) {
 816                 unsigned long flags;
 817                 if (count < 2)
 818                         return -EINVAL;
 819
 820                 spin_lock_irqsave(&pcdev->lock, flags);
 821
 822                 buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
 823                                        internal.queue);
 824                 buf->internal.bufnum = 0;
 825                 vb = &buf->vb;
 826                 buf->state = MX2_STATE_ACTIVE;
 827
 828                 phys = vb2_dma_contig_plane_dma_addr(vb, 0);
 829                 mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
 830                 list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
 831
 832                 buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
 833                                        internal.queue);
 834                 buf->internal.bufnum = 1;
 835                 vb = &buf->vb;
 836                 buf->state = MX2_STATE_ACTIVE;
 837
 838                 phys = vb2_dma_contig_plane_dma_addr(vb, 0);
 839                 mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
 840                 list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
 841
 842                 bytesperline = soc_mbus_bytes_per_line(icd->user_width,
 843                                 icd->current_fmt->host_fmt);
 844                 if (bytesperline < 0)
 845                         return bytesperline;
 846
 847                 /*
 848                  * I didn't manage to properly enable/disable the prp
 849                  * on a per frame basis during running transfers,
 850                  * thus we allocate a buffer here and use it to
 851                  * discard frames when no buffer is available.
 852                  * Feel free to work on this ;)
 853                  */
 854                 pcdev->discard_size = icd->user_height * bytesperline;
 855                 pcdev->discard_buffer = dma_alloc_coherent(ici->v4l2_dev.dev,
 856                                 pcdev->discard_size, &pcdev->discard_buffer_dma,
 857                                 GFP_KERNEL);
 858                 if (!pcdev->discard_buffer)
 859                         return -ENOMEM;
 860
 861                 pcdev->buf_discard[0].discard = true;
 862                 list_add_tail(&pcdev->buf_discard[0].queue,
 863                                       &pcdev->discard);
 864
 865                 pcdev->buf_discard[1].discard = true;
 866                 list_add_tail(&pcdev->buf_discard[1].queue,
 867                                       &pcdev->discard);
 868
 869                 mx2_prp_resize_commit(pcdev);
 870
 871                 mx27_camera_emma_buf_init(icd, bytesperline);
 872
 873                 if (prp->cfg.channel == 1) {
 874                         writel(PRP_CNTL_CH1EN |
 875                                 PRP_CNTL_CSIEN |
 876                                 prp->cfg.in_fmt |
 877                                 prp->cfg.out_fmt |
 878                                 PRP_CNTL_CH1_LEN |
 879                                 PRP_CNTL_CH1BYP |
 880                                 PRP_CNTL_CH1_TSKIP(0) |
 881                                 PRP_CNTL_IN_TSKIP(0),
 882                                 pcdev->base_emma + PRP_CNTL);
 883                 } else {
 884                         writel(PRP_CNTL_CH2EN |
 885                                 PRP_CNTL_CSIEN |
 886                                 prp->cfg.in_fmt |
 887                                 prp->cfg.out_fmt |
 888                                 PRP_CNTL_CH2_LEN |
 889                                 PRP_CNTL_CH2_TSKIP(0) |
 890                                 PRP_CNTL_IN_TSKIP(0),
 891                                 pcdev->base_emma + PRP_CNTL);
 892                 }
 893                 spin_unlock_irqrestore(&pcdev->lock, flags);
 894         }
 895
 896         return 0;
 897 }
 898
 899 static int mx2_stop_streaming(struct vb2_queue *q)
 900 {
 901         struct soc_camera_device *icd = soc_camera_from_vb2q(q);
 902         struct soc_camera_host *ici =
 903                 to_soc_camera_host(icd->parent);
 904         struct mx2_camera_dev *pcdev = ici->priv;
 905         struct mx2_fmt_cfg *prp = pcdev->emma_prp;
 906         unsigned long flags;
 907         void *b;
 908         u32 cntl;
 909
 910         if (cpu_is_mx27()) {
 911                 spin_lock_irqsave(&pcdev->lock, flags);
 912
 913                 cntl = readl(pcdev->base_emma + PRP_CNTL);
 914                 if (prp->cfg.channel == 1) {
 915                         writel(cntl & ~PRP_CNTL_CH1EN,
 916                                pcdev->base_emma + PRP_CNTL);
 917                 } else {
 918                         writel(cntl & ~PRP_CNTL_CH2EN,
 919                                pcdev->base_emma + PRP_CNTL);
 920                 }
 921                 INIT_LIST_HEAD(&pcdev->capture);
 922                 INIT_LIST_HEAD(&pcdev->active_bufs);
 923                 INIT_LIST_HEAD(&pcdev->discard);
 924
 925                 b = pcdev->discard_buffer;
 926                 pcdev->discard_buffer = NULL;
 927
 928                 spin_unlock_irqrestore(&pcdev->lock, flags);
 929
 930                 dma_free_coherent(ici->v4l2_dev.dev,
 931                         pcdev->discard_size, b, pcdev->discard_buffer_dma);
 932         }
 933
 934         return 0;
 935 }
 936
 937 static struct vb2_ops mx2_videobuf_ops = {
 938         .queue_setup     = mx2_videobuf_setup,
 939         .buf_prepare     = mx2_videobuf_prepare,
 940         .buf_queue       = mx2_videobuf_queue,
 941         .buf_cleanup     = mx2_videobuf_release,
 942         .start_streaming = mx2_start_streaming,
 943         .stop_streaming  = mx2_stop_streaming,
 944 };
 945
 946 static int mx2_camera_init_videobuf(struct vb2_queue *q,
 947                               struct soc_camera_device *icd)
 948 {
 949         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 950         q->io_modes = VB2_MMAP | VB2_USERPTR;
 951         q->drv_priv = icd;
 952         q->ops = &mx2_videobuf_ops;
 953         q->mem_ops = &vb2_dma_contig_memops;
 954         q->buf_struct_size = sizeof(struct mx2_buffer);
 955
 956         return vb2_queue_init(q);
 957 }
 958
 959 #define MX2_BUS_FLAGS   (V4L2_MBUS_MASTER | \
 960                         V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
 961                         V4L2_MBUS_VSYNC_ACTIVE_LOW | \
 962                         V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
 963                         V4L2_MBUS_HSYNC_ACTIVE_LOW | \
 964                         V4L2_MBUS_PCLK_SAMPLE_RISING | \
 965                         V4L2_MBUS_PCLK_SAMPLE_FALLING | \
 966                         V4L2_MBUS_DATA_ACTIVE_HIGH | \
 967                         V4L2_MBUS_DATA_ACTIVE_LOW)
 968
 969 static int mx27_camera_emma_prp_reset(struct mx2_camera_dev *pcdev)
 970 {
 971         u32 cntl;
 972         int count = 0;
 973
 974         cntl = readl(pcdev->base_emma + PRP_CNTL);
 975         writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
 976         while (count++ < 100) {
 977                 if (!(readl(pcdev->base_emma + PRP_CNTL) & PRP_CNTL_SWRST))
 978                         return 0;
 979                 barrier();
 980                 udelay(1);
 981         }
 982
 983         return -ETIMEDOUT;
 984 }
 985
 986 static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
 987 {
 988         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 989         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 990         struct mx2_camera_dev *pcdev = ici->priv;
 991         struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
 992         unsigned long common_flags;
 993         int ret;
 994         int bytesperline;
 995         u32 csicr1 = pcdev->csicr1;
 996
 997         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 998         if (!ret) {
 999                 common_flags = soc_mbus_config_compatible(&cfg, MX2_BUS_FLAGS);
1000                 if (!common_flags) {
1001                         dev_warn(icd->parent,
1002                                  "Flags incompatible: camera 0x%x, host 0x%x\n",
1003                                  cfg.flags, MX2_BUS_FLAGS);
1004                         return -EINVAL;
1005                 }
1006         } else if (ret != -ENOIOCTLCMD) {
1007                 return ret;
1008         } else {
1009                 common_flags = MX2_BUS_FLAGS;
1010         }
1011
1012         if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
1013             (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
1014                 if (pcdev->platform_flags & MX2_CAMERA_HSYNC_HIGH)
1015                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
1016                 else
1017                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
1018         }
1019
1020         if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
1021             (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
1022                 if (pcdev->platform_flags & MX2_CAMERA_PCLK_SAMPLE_RISING)
1023                         common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
1024                 else
1025                         common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
1026         }
1027
1028         cfg.flags = common_flags;
1029         ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
1030         if (ret < 0 && ret != -ENOIOCTLCMD) {
1031                 dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
1032                         common_flags, ret);
1033                 return ret;
1034         }
1035
1036         csicr1 = (csicr1 & ~CSICR1_FMT_MASK) | pcdev->emma_prp->cfg.csicr1;
1037
1038         if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
1039                 csicr1 |= CSICR1_REDGE;
1040         if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
1041                 csicr1 |= CSICR1_SOF_POL;
1042         if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
1043                 csicr1 |= CSICR1_HSYNC_POL;
1044         if (pcdev->platform_flags & MX2_CAMERA_EXT_VSYNC)
1045                 csicr1 |= CSICR1_EXT_VSYNC;
1046         if (pcdev->platform_flags & MX2_CAMERA_CCIR)
1047                 csicr1 |= CSICR1_CCIR_EN;
1048         if (pcdev->platform_flags & MX2_CAMERA_CCIR_INTERLACE)
1049                 csicr1 |= CSICR1_CCIR_MODE;
1050         if (pcdev->platform_flags & MX2_CAMERA_GATED_CLOCK)
1051                 csicr1 |= CSICR1_GCLK_MODE;
1052         if (pcdev->platform_flags & MX2_CAMERA_INV_DATA)
1053                 csicr1 |= CSICR1_INV_DATA;
1054
1055         pcdev->csicr1 = csicr1;
1056
1057         bytesperline = soc_mbus_bytes_per_line(icd->user_width,
1058                         icd->current_fmt->host_fmt);
1059         if (bytesperline < 0)
1060                 return bytesperline;
1061
1062         if (cpu_is_mx27()) {
1063                 ret = mx27_camera_emma_prp_reset(pcdev);
1064                 if (ret)
1065                         return ret;
1066         } else if (cpu_is_mx25()) {
1067                 writel((bytesperline * icd->user_height) >> 2,
1068                                 pcdev->base_csi + CSIRXCNT);
1069                 writel((bytesperline << 16) | icd->user_height,
1070                                 pcdev->base_csi + CSIIMAG_PARA);
1071         }
1072
1073         writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
1074
1075         return 0;
1076 }
1077
1078 static int mx2_camera_set_crop(struct soc_camera_device *icd,
1079                                 struct v4l2_crop *a)
1080 {
1081         struct v4l2_rect *rect = &a->c;
1082         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1083         struct v4l2_mbus_framefmt mf;
1084         int ret;
1085
1086         soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096);
1087         soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096);
1088
1089         ret = v4l2_subdev_call(sd, video, s_crop, a);
1090         if (ret < 0)
1091                 return ret;
1092
1093         /* The capture device might have changed its output  */
1094         ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1095         if (ret < 0)
1096                 return ret;
1097
1098         dev_dbg(icd->parent, "Sensor cropped %dx%d\n",
1099                 mf.width, mf.height);
1100
1101         icd->user_width         = mf.width;
1102         icd->user_height        = mf.height;
1103
1104         return ret;
1105 }
1106
1107 static int mx2_camera_get_formats(struct soc_camera_device *icd,
1108                                   unsigned int idx,
1109                                   struct soc_camera_format_xlate *xlate)
1110 {
1111         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1112         const struct soc_mbus_pixelfmt *fmt;
1113         struct device *dev = icd->parent;
1114         enum v4l2_mbus_pixelcode code;
1115         int ret, formats = 0;
1116
1117         ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
1118         if (ret < 0)
1119                 /* no more formats */
1120                 return 0;
1121
1122         fmt = soc_mbus_get_fmtdesc(code);
1123         if (!fmt) {
1124                 dev_err(dev, "Invalid format code #%u: %d\n", idx, code);
1125                 return 0;
1126         }
1127
1128         if (code == V4L2_MBUS_FMT_YUYV8_2X8 ||
1129             code == V4L2_MBUS_FMT_UYVY8_2X8) {
1130                 formats++;
1131                 if (xlate) {
1132                         /*
1133                          * CH2 can output YUV420 which is a standard format in
1134                          * soc_mediabus.c
1135                          */
1136                         xlate->host_fmt =
1137                                 soc_mbus_get_fmtdesc(V4L2_MBUS_FMT_YUYV8_1_5X8);
1138                         xlate->code     = code;
1139                         dev_dbg(dev, "Providing host format %s for sensor code %d\n",
1140                                xlate->host_fmt->name, code);
1141                         xlate++;
1142                 }
1143         }
1144
1145         /* Generic pass-trough */
1146         formats++;
1147         if (xlate) {
1148                 xlate->host_fmt = fmt;
1149                 xlate->code     = code;
1150                 xlate++;
1151         }
1152         return formats;
1153 }
1154
1155 static int mx2_emmaprp_resize(struct mx2_camera_dev *pcdev,
1156                               struct v4l2_mbus_framefmt *mf_in,
1157                               struct v4l2_pix_format *pix_out, bool apply)
1158 {
1159         int num, den;
1160         unsigned long m;
1161         int i, dir;
1162
1163         for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
1164                 struct emma_prp_resize tmprsz;
1165                 unsigned char *s = tmprsz.s;
1166                 int len = 0;
1167                 int in, out;
1168
1169                 if (dir == RESIZE_DIR_H) {
1170                         in = mf_in->width;
1171                         out = pix_out->width;
1172                 } else {
1173                         in = mf_in->height;
1174                         out = pix_out->height;
1175                 }
1176
1177                 if (in < out)
1178                         return -EINVAL;
1179                 else if (in == out)
1180                         continue;
1181
1182                 /* Calculate ratio */
1183                 m = gcd(in, out);
1184                 num = in / m;
1185                 den = out / m;
1186                 if (num > RESIZE_NUM_MAX)
1187                         return -EINVAL;
1188
1189                 if ((num >= 2 * den) && (den == 1) &&
1190                     (num < 9) && (!(num & 0x01))) {
1191                         int sum = 0;
1192                         int j;
1193
1194                         /* Average scaling for >= 2:1 ratios */
1195                         /* Support can be added for num >=9 and odd values */
1196
1197                         tmprsz.algo = RESIZE_ALGO_AVERAGING;
1198                         len = num;
1199
1200                         for (i = 0; i < (len / 2); i++)
1201                                 s[i] = 8;
1202
1203                         do {
1204                                 for (i = 0; i < (len / 2); i++) {
1205                                         s[i] = s[i] >> 1;
1206                                         sum = 0;
1207                                         for (j = 0; j < (len / 2); j++)
1208                                                 sum += s[j];
1209                                         if (sum == 4)
1210                                                 break;
1211                                 }
1212                         } while (sum != 4);
1213
1214                         for (i = (len / 2); i < len; i++)
1215                                 s[i] = s[len - i - 1];
1216
1217                         s[len - 1] |= SZ_COEF;
1218                 } else {
1219                         /* bilinear scaling for < 2:1 ratios */
1220                         int v; /* overflow counter */
1221                         int coeff, nxt; /* table output */
1222                         int in_pos_inc = 2 * den;
1223                         int out_pos = num;
1224                         int out_pos_inc = 2 * num;
1225                         int init_carry = num - den;
1226                         int carry = init_carry;
1227
1228                         tmprsz.algo = RESIZE_ALGO_BILINEAR;
1229                         v = den + in_pos_inc;
1230                         do {
1231                                 coeff = v - out_pos;
1232                                 out_pos += out_pos_inc;
1233                                 carry += out_pos_inc;
1234                                 for (nxt = 0; v < out_pos; nxt++) {
1235                                         v += in_pos_inc;
1236                                         carry -= in_pos_inc;
1237                                 }
1238
1239                                 if (len > RESIZE_NUM_MAX)
1240                                         return -EINVAL;
1241
1242                                 coeff = ((coeff << BC_COEF) +
1243                                         (in_pos_inc >> 1)) / in_pos_inc;
1244
1245                                 if (coeff >= (SZ_COEF - 1))
1246                                         coeff--;
1247
1248                                 coeff |= SZ_COEF;
1249                                 s[len] = (unsigned char)coeff;
1250                                 len++;
1251
1252                                 for (i = 1; i < nxt; i++) {
1253                                         if (len >= RESIZE_NUM_MAX)
1254                                                 return -EINVAL;
1255                                         s[len] = 0;
1256                                         len++;
1257                                 }
1258                         } while (carry != init_carry);
1259                 }
1260                 tmprsz.len = len;
1261                 if (dir == RESIZE_DIR_H)
1262                         mf_in->width = pix_out->width;
1263                 else
1264                         mf_in->height = pix_out->height;
1265
1266                 if (apply)
1267                         memcpy(&pcdev->resizing[dir], &tmprsz, sizeof(tmprsz));
1268         }
1269         return 0;
1270 }
1271
1272 static int mx2_camera_set_fmt(struct soc_camera_device *icd,
1273                                struct v4l2_format *f)
1274 {
1275         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1276         struct mx2_camera_dev *pcdev = ici->priv;
1277         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1278         const struct soc_camera_format_xlate *xlate;
1279         struct v4l2_pix_format *pix = &f->fmt.pix;
1280         struct v4l2_mbus_framefmt mf;
1281         int ret;
1282
1283         dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
1284                 __func__, pix->width, pix->height);
1285
1286         xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
1287         if (!xlate) {
1288                 dev_warn(icd->parent, "Format %x not found\n",
1289                                 pix->pixelformat);
1290                 return -EINVAL;
1291         }
1292
1293         mf.width        = pix->width;
1294         mf.height       = pix->height;
1295         mf.field        = pix->field;
1296         mf.colorspace   = pix->colorspace;
1297         mf.code         = xlate->code;
1298
1299         ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
1300         if (ret < 0 && ret != -ENOIOCTLCMD)
1301                 return ret;
1302
1303         /* Store width and height returned by the sensor for resizing */
1304         pcdev->s_width = mf.width;
1305         pcdev->s_height = mf.height;
1306         dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
1307                 __func__, pcdev->s_width, pcdev->s_height);
1308
1309         pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
1310                                                    xlate->host_fmt->fourcc);
1311
1312         memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
1313         if ((mf.width != pix->width || mf.height != pix->height) &&
1314                 pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
1315                 if (mx2_emmaprp_resize(pcdev, &mf, pix, true) < 0)
1316                         dev_dbg(icd->parent, "%s: can't resize\n", __func__);
1317         }
1318
1319         if (mf.code != xlate->code)
1320                 return -EINVAL;
1321
1322         pix->width              = mf.width;
1323         pix->height             = mf.height;
1324         pix->field              = mf.field;
1325         pix->colorspace         = mf.colorspace;
1326         icd->current_fmt        = xlate;
1327
1328         dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
1329                 __func__, pix->width, pix->height);
1330
1331         return 0;
1332 }
1333
1334 static int mx2_camera_try_fmt(struct soc_camera_device *icd,
1335                                   struct v4l2_format *f)
1336 {
1337         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1338         const struct soc_camera_format_xlate *xlate;
1339         struct v4l2_pix_format *pix = &f->fmt.pix;
1340         struct v4l2_mbus_framefmt mf;
1341         __u32 pixfmt = pix->pixelformat;
1342         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1343         struct mx2_camera_dev *pcdev = ici->priv;
1344         unsigned int width_limit;
1345         int ret;
1346
1347         dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
1348                 __func__, pix->width, pix->height);
1349
1350         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1351         if (pixfmt && !xlate) {
1352                 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1353                 return -EINVAL;
1354         }
1355
1356         /* FIXME: implement MX27 limits */
1357
1358         /* limit to MX25 hardware capabilities */
1359         if (cpu_is_mx25()) {
1360                 if (xlate->host_fmt->bits_per_sample <= 8)
1361                         width_limit = 0xffff * 4;
1362                 else
1363                         width_limit = 0xffff * 2;
1364                 /* CSIIMAG_PARA limit */
1365                 if (pix->width > width_limit)
1366                         pix->width = width_limit;
1367                 if (pix->height > 0xffff)
1368                         pix->height = 0xffff;
1369
1370                 pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
1371                                 xlate->host_fmt);
1372                 if (pix->bytesperline < 0)
1373                         return pix->bytesperline;
1374                 pix->sizeimage = soc_mbus_image_size(xlate->host_fmt,
1375                                                 pix->bytesperline, pix->height);
1376                 /* Check against the CSIRXCNT limit */
1377                 if (pix->sizeimage > 4 * 0x3ffff) {
1378                         /* Adjust geometry, preserve aspect ratio */
1379                         unsigned int new_height = int_sqrt(div_u64(0x3ffffULL *
1380                                         4 * pix->height, pix->bytesperline));
1381                         pix->width = new_height * pix->width / pix->height;
1382                         pix->height = new_height;
1383                         pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
1384                                                         xlate->host_fmt);
1385                         BUG_ON(pix->bytesperline < 0);
1386                         pix->sizeimage = soc_mbus_image_size(xlate->host_fmt,
1387                                                 pix->bytesperline, pix->height);
1388                 }
1389         }
1390
1391         /* limit to sensor capabilities */
1392         mf.width        = pix->width;
1393         mf.height       = pix->height;
1394         mf.field        = pix->field;
1395         mf.colorspace   = pix->colorspace;
1396         mf.code         = xlate->code;
1397
1398         ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
1399         if (ret < 0)
1400                 return ret;
1401
1402         dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
1403                 __func__, pcdev->s_width, pcdev->s_height);
1404
1405         /* If the sensor does not support image size try PrP resizing */
1406         pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
1407                                                    xlate->host_fmt->fourcc);
1408
1409         memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
1410         if ((mf.width != pix->width || mf.height != pix->height) &&
1411                 pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
1412                 if (mx2_emmaprp_resize(pcdev, &mf, pix, false) < 0)
1413                         dev_dbg(icd->parent, "%s: can't resize\n", __func__);
1414         }
1415
1416         if (mf.field == V4L2_FIELD_ANY)
1417                 mf.field = V4L2_FIELD_NONE;
1418         /*
1419          * Driver supports interlaced images provided they have
1420          * both fields so that they can be processed as if they
1421          * were progressive.
1422          */
1423         if (mf.field != V4L2_FIELD_NONE && !V4L2_FIELD_HAS_BOTH(mf.field)) {
1424                 dev_err(icd->parent, "Field type %d unsupported.\n",
1425                                 mf.field);
1426                 return -EINVAL;
1427         }
1428
1429         pix->width      = mf.width;
1430         pix->height     = mf.height;
1431         pix->field      = mf.field;
1432         pix->colorspace = mf.colorspace;
1433
1434         dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
1435                 __func__, pix->width, pix->height);
1436
1437         return 0;
1438 }
1439
1440 static int mx2_camera_querycap(struct soc_camera_host *ici,
1441                                struct v4l2_capability *cap)
1442 {
1443         /* cap->name is set by the friendly caller:-> */
1444         strlcpy(cap->card, MX2_CAM_DRIVER_DESCRIPTION, sizeof(cap->card));
1445         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1446
1447         return 0;
1448 }
1449
1450 static unsigned int mx2_camera_poll(struct file *file, poll_table *pt)
1451 {
1452         struct soc_camera_device *icd = file->private_data;
1453
1454         return vb2_poll(&icd->vb2_vidq, file, pt);
1455 }
1456
1457 static struct soc_camera_host_ops mx2_soc_camera_host_ops = {
1458         .owner          = THIS_MODULE,
1459         .add            = mx2_camera_add_device,
1460         .remove         = mx2_camera_remove_device,
1461         .set_fmt        = mx2_camera_set_fmt,
1462         .set_crop       = mx2_camera_set_crop,
1463         .get_formats    = mx2_camera_get_formats,
1464         .try_fmt        = mx2_camera_try_fmt,
1465         .init_videobuf2 = mx2_camera_init_videobuf,
1466         .poll           = mx2_camera_poll,
1467         .querycap       = mx2_camera_querycap,
1468         .set_bus_param  = mx2_camera_set_bus_param,
1469 };
1470
1471 static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev,
1472                 int bufnum, bool err)
1473 {
1474 #ifdef DEBUG
1475         struct mx2_fmt_cfg *prp = pcdev->emma_prp;
1476 #endif
1477         struct mx2_buf_internal *ibuf;
1478         struct mx2_buffer *buf;
1479         struct vb2_buffer *vb;
1480         unsigned long phys;
1481
1482         ibuf = list_first_entry(&pcdev->active_bufs, struct mx2_buf_internal,
1483                                queue);
1484
1485         BUG_ON(ibuf->bufnum != bufnum);
1486
1487         if (ibuf->discard) {
1488                 /*
1489                  * Discard buffer must not be returned to user space.
1490                  * Just return it to the discard queue.
1491                  */
1492                 list_move_tail(pcdev->active_bufs.next, &pcdev->discard);
1493         } else {
1494                 buf = mx2_ibuf_to_buf(ibuf);
1495
1496                 vb = &buf->vb;
1497 #ifdef DEBUG
1498                 phys = vb2_dma_contig_plane_dma_addr(vb, 0);
1499                 if (prp->cfg.channel == 1) {
1500                         if (readl(pcdev->base_emma + PRP_DEST_RGB1_PTR +
1501                                 4 * bufnum) != phys) {
1502                                 dev_err(pcdev->dev, "%lx != %x\n", phys,
1503                                         readl(pcdev->base_emma +
1504                                         PRP_DEST_RGB1_PTR + 4 * bufnum));
1505                         }
1506                 } else {
1507                         if (readl(pcdev->base_emma + PRP_DEST_Y_PTR -
1508                                 0x14 * bufnum) != phys) {
1509                                 dev_err(pcdev->dev, "%lx != %x\n", phys,
1510                                         readl(pcdev->base_emma +
1511                                         PRP_DEST_Y_PTR - 0x14 * bufnum));
1512                         }
1513                 }
1514 #endif
1515                 dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__, vb,
1516                                 vb2_plane_vaddr(vb, 0),
1517                                 vb2_get_plane_payload(vb, 0));
1518
1519                 list_del_init(&buf->internal.queue);
1520                 do_gettimeofday(&vb->v4l2_buf.timestamp);
1521                 vb->v4l2_buf.sequence = pcdev->frame_count;
1522                 if (err)
1523                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
1524                 else
1525                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
1526         }
1527
1528         pcdev->frame_count++;
1529
1530         if (list_empty(&pcdev->capture)) {
1531                 if (list_empty(&pcdev->discard)) {
1532                         dev_warn(pcdev->dev, "%s: trying to access empty discard list\n",
1533                                  __func__);
1534                         return;
1535                 }
1536
1537                 ibuf = list_first_entry(&pcdev->discard,
1538                                         struct mx2_buf_internal, queue);
1539                 ibuf->bufnum = bufnum;
1540
1541                 list_move_tail(pcdev->discard.next, &pcdev->active_bufs);
1542                 mx27_update_emma_buf(pcdev, pcdev->discard_buffer_dma, bufnum);
1543                 return;
1544         }
1545
1546         buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
1547                                internal.queue);
1548
1549         buf->internal.bufnum = bufnum;
1550
1551         list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
1552
1553         vb = &buf->vb;
1554         buf->state = MX2_STATE_ACTIVE;
1555
1556         phys = vb2_dma_contig_plane_dma_addr(vb, 0);
1557         mx27_update_emma_buf(pcdev, phys, bufnum);
1558 }
1559
1560 static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
1561 {
1562         struct mx2_camera_dev *pcdev = data;
1563         unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS);
1564         struct mx2_buf_internal *ibuf;
1565
1566         spin_lock(&pcdev->lock);
1567
1568         if (list_empty(&pcdev->active_bufs)) {
1569                 dev_warn(pcdev->dev, "%s: called while active list is empty\n",
1570                         __func__);
1571
1572                 if (!status) {
1573                         spin_unlock(&pcdev->lock);
1574                         return IRQ_NONE;
1575                 }
1576         }
1577
1578         if (status & (1 << 7)) { /* overflow */
1579                 u32 cntl = readl(pcdev->base_emma + PRP_CNTL);
1580                 writel(cntl & ~(PRP_CNTL_CH1EN | PRP_CNTL_CH2EN),
1581                        pcdev->base_emma + PRP_CNTL);
1582                 writel(cntl, pcdev->base_emma + PRP_CNTL);
1583
1584                 ibuf = list_first_entry(&pcdev->active_bufs,
1585                                         struct mx2_buf_internal, queue);
1586                 mx27_camera_frame_done_emma(pcdev,
1587                                         ibuf->bufnum, true);
1588
1589                 status &= ~(1 << 7);
1590         } else if (((status & (3 << 5)) == (3 << 5)) ||
1591                 ((status & (3 << 3)) == (3 << 3))) {
1592                 /*
1593                  * Both buffers have triggered, process the one we're expecting
1594                  * to first
1595                  */
1596                 ibuf = list_first_entry(&pcdev->active_bufs,
1597                                         struct mx2_buf_internal, queue);
1598                 mx27_camera_frame_done_emma(pcdev, ibuf->bufnum, false);
1599                 status &= ~(1 << (6 - ibuf->bufnum)); /* mark processed */
1600         } else if ((status & (1 << 6)) || (status & (1 << 4))) {
1601                 mx27_camera_frame_done_emma(pcdev, 0, false);
1602         } else if ((status & (1 << 5)) || (status & (1 << 3))) {
1603                 mx27_camera_frame_done_emma(pcdev, 1, false);
1604         }
1605
1606         spin_unlock(&pcdev->lock);
1607         writel(status, pcdev->base_emma + PRP_INTRSTATUS);
1608
1609         return IRQ_HANDLED;
1610 }
1611
1612 static int __devinit mx27_camera_emma_init(struct mx2_camera_dev *pcdev)
1613 {
1614         struct resource *res_emma = pcdev->res_emma;
1615         int err = 0;
1616
1617         if (!request_mem_region(res_emma->start, resource_size(res_emma),
1618                                 MX2_CAM_DRV_NAME)) {
1619                 err = -EBUSY;
1620                 goto out;
1621         }
1622
1623         pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma));
1624         if (!pcdev->base_emma) {
1625                 err = -ENOMEM;
1626                 goto exit_release;
1627         }
1628
1629         err = request_irq(pcdev->irq_emma, mx27_camera_emma_irq, 0,
1630                         MX2_CAM_DRV_NAME, pcdev);
1631         if (err) {
1632                 dev_err(pcdev->dev, "Camera EMMA interrupt register failed \n");
1633                 goto exit_iounmap;
1634         }
1635
1636         pcdev->clk_emma_ipg = clk_get(pcdev->dev, "emma-ipg");
1637         if (IS_ERR(pcdev->clk_emma_ipg)) {
1638                 err = PTR_ERR(pcdev->clk_emma_ipg);
1639                 goto exit_free_irq;
1640         }
1641
1642         clk_prepare_enable(pcdev->clk_emma_ipg);
1643
1644         pcdev->clk_emma_ahb = clk_get(pcdev->dev, "emma-ahb");
1645         if (IS_ERR(pcdev->clk_emma_ahb)) {
1646                 err = PTR_ERR(pcdev->clk_emma_ahb);
1647                 goto exit_clk_emma_ipg_put;
1648         }
1649
1650         clk_prepare_enable(pcdev->clk_emma_ahb);
1651
1652         err = mx27_camera_emma_prp_reset(pcdev);
1653         if (err)
1654                 goto exit_clk_emma_ahb_put;
1655
1656         return err;
1657
1658 exit_clk_emma_ahb_put:
1659         clk_disable_unprepare(pcdev->clk_emma_ahb);
1660         clk_put(pcdev->clk_emma_ahb);
1661 exit_clk_emma_ipg_put:
1662         clk_disable_unprepare(pcdev->clk_emma_ipg);
1663         clk_put(pcdev->clk_emma_ipg);
1664 exit_free_irq:
1665         free_irq(pcdev->irq_emma, pcdev);
1666 exit_iounmap:
1667         iounmap(pcdev->base_emma);
1668 exit_release:
1669         release_mem_region(res_emma->start, resource_size(res_emma));
1670 out:
1671         return err;
1672 }
1673
1674 static int __devinit mx2_camera_probe(struct platform_device *pdev)
1675 {
1676         struct mx2_camera_dev *pcdev;
1677         struct resource *res_csi, *res_emma;
1678         void __iomem *base_csi;
1679         int irq_csi, irq_emma;
1680         int err = 0;
1681
1682         dev_dbg(&pdev->dev, "initialising\n");
1683
1684         res_csi = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1685         irq_csi = platform_get_irq(pdev, 0);
1686         if (res_csi == NULL || irq_csi < 0) {
1687                 dev_err(&pdev->dev, "Missing platform resources data\n");
1688                 err = -ENODEV;
1689                 goto exit;
1690         }
1691
1692         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1693         if (!pcdev) {
1694                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1695                 err = -ENOMEM;
1696                 goto exit;
1697         }
1698
1699         pcdev->clk_csi = clk_get(&pdev->dev, "ahb");
1700         if (IS_ERR(pcdev->clk_csi)) {
1701                 dev_err(&pdev->dev, "Could not get csi clock\n");
1702                 err = PTR_ERR(pcdev->clk_csi);
1703                 goto exit_kfree;
1704         }
1705
1706         pcdev->res_csi = res_csi;
1707         pcdev->pdata = pdev->dev.platform_data;
1708         if (pcdev->pdata) {
1709                 long rate;
1710
1711                 pcdev->platform_flags = pcdev->pdata->flags;
1712
1713                 rate = clk_round_rate(pcdev->clk_csi, pcdev->pdata->clk * 2);
1714                 if (rate <= 0) {
1715                         err = -ENODEV;
1716                         goto exit_dma_free;
1717                 }
1718                 err = clk_set_rate(pcdev->clk_csi, rate);
1719                 if (err < 0)
1720                         goto exit_dma_free;
1721         }
1722
1723         INIT_LIST_HEAD(&pcdev->capture);
1724         INIT_LIST_HEAD(&pcdev->active_bufs);
1725         INIT_LIST_HEAD(&pcdev->discard);
1726         spin_lock_init(&pcdev->lock);
1727
1728         /*
1729          * Request the regions.
1730          */
1731         if (!request_mem_region(res_csi->start, resource_size(res_csi),
1732                                 MX2_CAM_DRV_NAME)) {
1733                 err = -EBUSY;
1734                 goto exit_dma_free;
1735         }
1736
1737         base_csi = ioremap(res_csi->start, resource_size(res_csi));
1738         if (!base_csi) {
1739                 err = -ENOMEM;
1740                 goto exit_release;
1741         }
1742         pcdev->irq_csi = irq_csi;
1743         pcdev->base_csi = base_csi;
1744         pcdev->base_dma = res_csi->start;
1745         pcdev->dev = &pdev->dev;
1746
1747         if (cpu_is_mx25()) {
1748                 err = request_irq(pcdev->irq_csi, mx25_camera_irq, 0,
1749                                 MX2_CAM_DRV_NAME, pcdev);
1750                 if (err) {
1751                         dev_err(pcdev->dev, "Camera interrupt register failed \n");
1752                         goto exit_iounmap;
1753                 }
1754         }
1755
1756         if (cpu_is_mx27()) {
1757                 /* EMMA support */
1758                 res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1759                 irq_emma = platform_get_irq(pdev, 1);
1760
1761                 if (!res_emma || !irq_emma) {
1762                         dev_err(&pdev->dev, "no EMMA resources\n");
1763                         goto exit_free_irq;
1764                 }
1765
1766                 pcdev->res_emma = res_emma;
1767                 pcdev->irq_emma = irq_emma;
1768                 if (mx27_camera_emma_init(pcdev))
1769                         goto exit_free_irq;
1770         }
1771
1772         pcdev->soc_host.drv_name        = MX2_CAM_DRV_NAME,
1773         pcdev->soc_host.ops             = &mx2_soc_camera_host_ops,
1774         pcdev->soc_host.priv            = pcdev;
1775         pcdev->soc_host.v4l2_dev.dev    = &pdev->dev;
1776         pcdev->soc_host.nr              = pdev->id;
1777         if (cpu_is_mx25())
1778                 pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
1779
1780         pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1781         if (IS_ERR(pcdev->alloc_ctx)) {
1782                 err = PTR_ERR(pcdev->alloc_ctx);
1783                 goto eallocctx;
1784         }
1785         err = soc_camera_host_register(&pcdev->soc_host);
1786         if (err)
1787                 goto exit_free_emma;
1788
1789         dev_info(&pdev->dev, "MX2 Camera (CSI) driver probed, clock frequency: %ld\n",
1790                         clk_get_rate(pcdev->clk_csi));
1791
1792         return 0;
1793
1794 exit_free_emma:
1795         vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1796 eallocctx:
1797         if (cpu_is_mx27()) {
1798                 free_irq(pcdev->irq_emma, pcdev);
1799                 clk_disable_unprepare(pcdev->clk_emma_ipg);
1800                 clk_put(pcdev->clk_emma_ipg);
1801                 clk_disable_unprepare(pcdev->clk_emma_ahb);
1802                 clk_put(pcdev->clk_emma_ahb);
1803                 iounmap(pcdev->base_emma);
1804                 release_mem_region(pcdev->res_emma->start, resource_size(pcdev->res_emma));
1805         }
1806 exit_free_irq:
1807         if (cpu_is_mx25())
1808                 free_irq(pcdev->irq_csi, pcdev);
1809 exit_iounmap:
1810         iounmap(base_csi);
1811 exit_release:
1812         release_mem_region(res_csi->start, resource_size(res_csi));
1813 exit_dma_free:
1814         clk_put(pcdev->clk_csi);
1815 exit_kfree:
1816         kfree(pcdev);
1817 exit:
1818         return err;
1819 }
1820
1821 static int __devexit mx2_camera_remove(struct platform_device *pdev)
1822 {
1823         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1824         struct mx2_camera_dev *pcdev = container_of(soc_host,
1825                         struct mx2_camera_dev, soc_host);
1826         struct resource *res;
1827
1828         clk_put(pcdev->clk_csi);
1829         if (cpu_is_mx25())
1830                 free_irq(pcdev->irq_csi, pcdev);
1831         if (cpu_is_mx27())
1832                 free_irq(pcdev->irq_emma, pcdev);
1833
1834         soc_camera_host_unregister(&pcdev->soc_host);
1835
1836         vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1837
1838         iounmap(pcdev->base_csi);
1839
1840         if (cpu_is_mx27()) {
1841                 clk_disable_unprepare(pcdev->clk_emma_ipg);
1842                 clk_put(pcdev->clk_emma_ipg);
1843                 clk_disable_unprepare(pcdev->clk_emma_ahb);
1844                 clk_put(pcdev->clk_emma_ahb);
1845                 iounmap(pcdev->base_emma);
1846                 res = pcdev->res_emma;
1847                 release_mem_region(res->start, resource_size(res));
1848         }
1849
1850         res = pcdev->res_csi;
1851         release_mem_region(res->start, resource_size(res));
1852
1853         kfree(pcdev);
1854
1855         dev_info(&pdev->dev, "MX2 Camera driver unloaded\n");
1856
1857         return 0;
1858 }
1859
1860 static struct platform_driver mx2_camera_driver = {
1861         .driver         = {
1862                 .name   = MX2_CAM_DRV_NAME,
1863         },
1864         .remove         = __devexit_p(mx2_camera_remove),
1865 };
1866
1867
1868 static int __init mx2_camera_init(void)
1869 {
1870         return platform_driver_probe(&mx2_camera_driver, &mx2_camera_probe);
1871 }
1872
1873 static void __exit mx2_camera_exit(void)
1874 {
1875         return platform_driver_unregister(&mx2_camera_driver);
1876 }
1877
1878 module_init(mx2_camera_init);
1879 module_exit(mx2_camera_exit);
1880
1881 MODULE_DESCRIPTION("i.MX27/i.MX25 SoC Camera Host driver");
1882 MODULE_AUTHOR("Sascha Hauer <sha@pengutronix.de>");
1883 MODULE_LICENSE("GPL");
1884 MODULE_VERSION(MX2_CAM_VERSION);