drivers/media/platform/omap3isp/ispcsi2.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ispcsi2.c
   4  *
   5  * TI OMAP3 ISP - CSI2 module
   6  *
   7  * Copyright (C) 2010 Nokia Corporation
   8  * Copyright (C) 2009 Texas Instruments, Inc.
   9  *
  10  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  11  *           Sakari Ailus <sakari.ailus@iki.fi>
  12  */
  13 #include <linux/delay.h>
  14 #include <media/v4l2-common.h>
  15 #include <linux/v4l2-mediabus.h>
  16 #include <linux/mm.h>
  17
  18 #include "isp.h"
  19 #include "ispreg.h"
  20 #include "ispcsi2.h"
  21
  22 /*
  23  * csi2_if_enable - Enable CSI2 Receiver interface.
  24  * @enable: enable flag
  25  *
  26  */
  27 static void csi2_if_enable(struct isp_device *isp,
  28                            struct isp_csi2_device *csi2, u8 enable)
  29 {
  30         struct isp_csi2_ctrl_cfg *currctrl = &csi2->ctrl;
  31
  32         isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_CTRL, ISPCSI2_CTRL_IF_EN,
  33                         enable ? ISPCSI2_CTRL_IF_EN : 0);
  34
  35         currctrl->if_enable = enable;
  36 }
  37
  38 /*
  39  * csi2_recv_config - CSI2 receiver module configuration.
  40  * @currctrl: isp_csi2_ctrl_cfg structure
  41  *
  42  */
  43 static void csi2_recv_config(struct isp_device *isp,
  44                              struct isp_csi2_device *csi2,
  45                              struct isp_csi2_ctrl_cfg *currctrl)
  46 {
  47         u32 reg;
  48
  49         reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTRL);
  50
  51         if (currctrl->frame_mode)
  52                 reg |= ISPCSI2_CTRL_FRAME;
  53         else
  54                 reg &= ~ISPCSI2_CTRL_FRAME;
  55
  56         if (currctrl->vp_clk_enable)
  57                 reg |= ISPCSI2_CTRL_VP_CLK_EN;
  58         else
  59                 reg &= ~ISPCSI2_CTRL_VP_CLK_EN;
  60
  61         if (currctrl->vp_only_enable)
  62                 reg |= ISPCSI2_CTRL_VP_ONLY_EN;
  63         else
  64                 reg &= ~ISPCSI2_CTRL_VP_ONLY_EN;
  65
  66         reg &= ~ISPCSI2_CTRL_VP_OUT_CTRL_MASK;
  67         reg |= currctrl->vp_out_ctrl << ISPCSI2_CTRL_VP_OUT_CTRL_SHIFT;
  68
  69         if (currctrl->ecc_enable)
  70                 reg |= ISPCSI2_CTRL_ECC_EN;
  71         else
  72                 reg &= ~ISPCSI2_CTRL_ECC_EN;
  73
  74         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTRL);
  75 }
  76
  77 static const unsigned int csi2_input_fmts[] = {
  78         MEDIA_BUS_FMT_SGRBG10_1X10,
  79         MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
  80         MEDIA_BUS_FMT_SRGGB10_1X10,
  81         MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
  82         MEDIA_BUS_FMT_SBGGR10_1X10,
  83         MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
  84         MEDIA_BUS_FMT_SGBRG10_1X10,
  85         MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
  86         MEDIA_BUS_FMT_YUYV8_2X8,
  87 };
  88
  89 /* To set the format on the CSI2 requires a mapping function that takes
  90  * the following inputs:
  91  * - 3 different formats (at this time)
  92  * - 2 destinations (mem, vp+mem) (vp only handled separately)
  93  * - 2 decompression options (on, off)
  94  * - 2 isp revisions (certain format must be handled differently on OMAP3630)
  95  * Output should be CSI2 frame format code
  96  * Array indices as follows: [format][dest][decompr][is_3630]
  97  * Not all combinations are valid. 0 means invalid.
  98  */
  99 static const u16 __csi2_fmt_map[3][2][2][2] = {
 100         /* RAW10 formats */
 101         {
 102                 /* Output to memory */
 103                 {
 104                         /* No DPCM decompression */
 105                         { CSI2_PIX_FMT_RAW10_EXP16, CSI2_PIX_FMT_RAW10_EXP16 },
 106                         /* DPCM decompression */
 107                         { 0, 0 },
 108                 },
 109                 /* Output to both */
 110                 {
 111                         /* No DPCM decompression */
 112                         { CSI2_PIX_FMT_RAW10_EXP16_VP,
 113                           CSI2_PIX_FMT_RAW10_EXP16_VP },
 114                         /* DPCM decompression */
 115                         { 0, 0 },
 116                 },
 117         },
 118         /* RAW10 DPCM8 formats */
 119         {
 120                 /* Output to memory */
 121                 {
 122                         /* No DPCM decompression */
 123                         { CSI2_PIX_FMT_RAW8, CSI2_USERDEF_8BIT_DATA1 },
 124                         /* DPCM decompression */
 125                         { CSI2_PIX_FMT_RAW8_DPCM10_EXP16,
 126                           CSI2_USERDEF_8BIT_DATA1_DPCM10 },
 127                 },
 128                 /* Output to both */
 129                 {
 130                         /* No DPCM decompression */
 131                         { CSI2_PIX_FMT_RAW8_VP,
 132                           CSI2_PIX_FMT_RAW8_VP },
 133                         /* DPCM decompression */
 134                         { CSI2_PIX_FMT_RAW8_DPCM10_VP,
 135                           CSI2_USERDEF_8BIT_DATA1_DPCM10_VP },
 136                 },
 137         },
 138         /* YUYV8 2X8 formats */
 139         {
 140                 /* Output to memory */
 141                 {
 142                         /* No DPCM decompression */
 143                         { CSI2_PIX_FMT_YUV422_8BIT,
 144                           CSI2_PIX_FMT_YUV422_8BIT },
 145                         /* DPCM decompression */
 146                         { 0, 0 },
 147                 },
 148                 /* Output to both */
 149                 {
 150                         /* No DPCM decompression */
 151                         { CSI2_PIX_FMT_YUV422_8BIT_VP,
 152                           CSI2_PIX_FMT_YUV422_8BIT_VP },
 153                         /* DPCM decompression */
 154                         { 0, 0 },
 155                 },
 156         },
 157 };
 158
 159 /*
 160  * csi2_ctx_map_format - Map CSI2 sink media bus format to CSI2 format ID
 161  * @csi2: ISP CSI2 device
 162  *
 163  * Returns CSI2 physical format id
 164  */
 165 static u16 csi2_ctx_map_format(struct isp_csi2_device *csi2)
 166 {
 167         const struct v4l2_mbus_framefmt *fmt = &csi2->formats[CSI2_PAD_SINK];
 168         int fmtidx, destidx, is_3630;
 169
 170         switch (fmt->code) {
 171         case MEDIA_BUS_FMT_SGRBG10_1X10:
 172         case MEDIA_BUS_FMT_SRGGB10_1X10:
 173         case MEDIA_BUS_FMT_SBGGR10_1X10:
 174         case MEDIA_BUS_FMT_SGBRG10_1X10:
 175                 fmtidx = 0;
 176                 break;
 177         case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
 178         case MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8:
 179         case MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8:
 180         case MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8:
 181                 fmtidx = 1;
 182                 break;
 183         case MEDIA_BUS_FMT_YUYV8_2X8:
 184                 fmtidx = 2;
 185                 break;
 186         default:
 187                 WARN(1, KERN_ERR "CSI2: pixel format %08x unsupported!\n",
 188                      fmt->code);
 189                 return 0;
 190         }
 191
 192         if (!(csi2->output & CSI2_OUTPUT_CCDC) &&
 193             !(csi2->output & CSI2_OUTPUT_MEMORY)) {
 194                 /* Neither output enabled is a valid combination */
 195                 return CSI2_PIX_FMT_OTHERS;
 196         }
 197
 198         /* If we need to skip frames at the beginning of the stream disable the
 199          * video port to avoid sending the skipped frames to the CCDC.
 200          */
 201         destidx = csi2->frame_skip ? 0 : !!(csi2->output & CSI2_OUTPUT_CCDC);
 202         is_3630 = csi2->isp->revision == ISP_REVISION_15_0;
 203
 204         return __csi2_fmt_map[fmtidx][destidx][csi2->dpcm_decompress][is_3630];
 205 }
 206
 207 /*
 208  * csi2_set_outaddr - Set memory address to save output image
 209  * @csi2: Pointer to ISP CSI2a device.
 210  * @addr: ISP MMU Mapped 32-bit memory address aligned on 32 byte boundary.
 211  *
 212  * Sets the memory address where the output will be saved.
 213  *
 214  * Returns 0 if successful, or -EINVAL if the address is not in the 32 byte
 215  * boundary.
 216  */
 217 static void csi2_set_outaddr(struct isp_csi2_device *csi2, u32 addr)
 218 {
 219         struct isp_device *isp = csi2->isp;
 220         struct isp_csi2_ctx_cfg *ctx = &csi2->contexts[0];
 221
 222         ctx->ping_addr = addr;
 223         ctx->pong_addr = addr;
 224         isp_reg_writel(isp, ctx->ping_addr,
 225                        csi2->regs1, ISPCSI2_CTX_DAT_PING_ADDR(ctx->ctxnum));
 226         isp_reg_writel(isp, ctx->pong_addr,
 227                        csi2->regs1, ISPCSI2_CTX_DAT_PONG_ADDR(ctx->ctxnum));
 228 }
 229
 230 /*
 231  * is_usr_def_mapping - Checks whether USER_DEF_MAPPING should
 232  *                      be enabled by CSI2.
 233  * @format_id: mapped format id
 234  *
 235  */
 236 static inline int is_usr_def_mapping(u32 format_id)
 237 {
 238         return (format_id & 0x40) ? 1 : 0;
 239 }
 240
 241 /*
 242  * csi2_ctx_enable - Enable specified CSI2 context
 243  * @ctxnum: Context number, valid between 0 and 7 values.
 244  * @enable: enable
 245  *
 246  */
 247 static void csi2_ctx_enable(struct isp_device *isp,
 248                             struct isp_csi2_device *csi2, u8 ctxnum, u8 enable)
 249 {
 250         struct isp_csi2_ctx_cfg *ctx = &csi2->contexts[ctxnum];
 251         unsigned int skip = 0;
 252         u32 reg;
 253
 254         reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL1(ctxnum));
 255
 256         if (enable) {
 257                 if (csi2->frame_skip)
 258                         skip = csi2->frame_skip;
 259                 else if (csi2->output & CSI2_OUTPUT_MEMORY)
 260                         skip = 1;
 261
 262                 reg &= ~ISPCSI2_CTX_CTRL1_COUNT_MASK;
 263                 reg |= ISPCSI2_CTX_CTRL1_COUNT_UNLOCK
 264                     |  (skip << ISPCSI2_CTX_CTRL1_COUNT_SHIFT)
 265                     |  ISPCSI2_CTX_CTRL1_CTX_EN;
 266         } else {
 267                 reg &= ~ISPCSI2_CTX_CTRL1_CTX_EN;
 268         }
 269
 270         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL1(ctxnum));
 271         ctx->enabled = enable;
 272 }
 273
 274 /*
 275  * csi2_ctx_config - CSI2 context configuration.
 276  * @ctx: context configuration
 277  *
 278  */
 279 static void csi2_ctx_config(struct isp_device *isp,
 280                             struct isp_csi2_device *csi2,
 281                             struct isp_csi2_ctx_cfg *ctx)
 282 {
 283         u32 reg;
 284
 285         /* Set up CSI2_CTx_CTRL1 */
 286         reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL1(ctx->ctxnum));
 287
 288         if (ctx->eof_enabled)
 289                 reg |= ISPCSI2_CTX_CTRL1_EOF_EN;
 290         else
 291                 reg &= ~ISPCSI2_CTX_CTRL1_EOF_EN;
 292
 293         if (ctx->eol_enabled)
 294                 reg |= ISPCSI2_CTX_CTRL1_EOL_EN;
 295         else
 296                 reg &= ~ISPCSI2_CTX_CTRL1_EOL_EN;
 297
 298         if (ctx->checksum_enabled)
 299                 reg |= ISPCSI2_CTX_CTRL1_CS_EN;
 300         else
 301                 reg &= ~ISPCSI2_CTX_CTRL1_CS_EN;
 302
 303         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL1(ctx->ctxnum));
 304
 305         /* Set up CSI2_CTx_CTRL2 */
 306         reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL2(ctx->ctxnum));
 307
 308         reg &= ~(ISPCSI2_CTX_CTRL2_VIRTUAL_ID_MASK);
 309         reg |= ctx->virtual_id << ISPCSI2_CTX_CTRL2_VIRTUAL_ID_SHIFT;
 310
 311         reg &= ~(ISPCSI2_CTX_CTRL2_FORMAT_MASK);
 312         reg |= ctx->format_id << ISPCSI2_CTX_CTRL2_FORMAT_SHIFT;
 313
 314         if (ctx->dpcm_decompress) {
 315                 if (ctx->dpcm_predictor)
 316                         reg |= ISPCSI2_CTX_CTRL2_DPCM_PRED;
 317                 else
 318                         reg &= ~ISPCSI2_CTX_CTRL2_DPCM_PRED;
 319         }
 320
 321         if (is_usr_def_mapping(ctx->format_id)) {
 322                 reg &= ~ISPCSI2_CTX_CTRL2_USER_DEF_MAP_MASK;
 323                 reg |= 2 << ISPCSI2_CTX_CTRL2_USER_DEF_MAP_SHIFT;
 324         }
 325
 326         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL2(ctx->ctxnum));
 327
 328         /* Set up CSI2_CTx_CTRL3 */
 329         reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL3(ctx->ctxnum));
 330         reg &= ~(ISPCSI2_CTX_CTRL3_ALPHA_MASK);
 331         reg |= (ctx->alpha << ISPCSI2_CTX_CTRL3_ALPHA_SHIFT);
 332
 333         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL3(ctx->ctxnum));
 334
 335         /* Set up CSI2_CTx_DAT_OFST */
 336         reg = isp_reg_readl(isp, csi2->regs1,
 337                             ISPCSI2_CTX_DAT_OFST(ctx->ctxnum));
 338         reg &= ~ISPCSI2_CTX_DAT_OFST_OFST_MASK;
 339         reg |= ctx->data_offset << ISPCSI2_CTX_DAT_OFST_OFST_SHIFT;
 340         isp_reg_writel(isp, reg, csi2->regs1,
 341                        ISPCSI2_CTX_DAT_OFST(ctx->ctxnum));
 342
 343         isp_reg_writel(isp, ctx->ping_addr,
 344                        csi2->regs1, ISPCSI2_CTX_DAT_PING_ADDR(ctx->ctxnum));
 345
 346         isp_reg_writel(isp, ctx->pong_addr,
 347                        csi2->regs1, ISPCSI2_CTX_DAT_PONG_ADDR(ctx->ctxnum));
 348 }
 349
 350 /*
 351  * csi2_timing_config - CSI2 timing configuration.
 352  * @timing: csi2_timing_cfg structure
 353  */
 354 static void csi2_timing_config(struct isp_device *isp,
 355                                struct isp_csi2_device *csi2,
 356                                struct isp_csi2_timing_cfg *timing)
 357 {
 358         u32 reg;
 359
 360         reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_TIMING);
 361
 362         if (timing->force_rx_mode)
 363                 reg |= ISPCSI2_TIMING_FORCE_RX_MODE_IO(timing->ionum);
 364         else
 365                 reg &= ~ISPCSI2_TIMING_FORCE_RX_MODE_IO(timing->ionum);
 366
 367         if (timing->stop_state_16x)
 368                 reg |= ISPCSI2_TIMING_STOP_STATE_X16_IO(timing->ionum);
 369         else
 370                 reg &= ~ISPCSI2_TIMING_STOP_STATE_X16_IO(timing->ionum);
 371
 372         if (timing->stop_state_4x)
 373                 reg |= ISPCSI2_TIMING_STOP_STATE_X4_IO(timing->ionum);
 374         else
 375                 reg &= ~ISPCSI2_TIMING_STOP_STATE_X4_IO(timing->ionum);
 376
 377         reg &= ~ISPCSI2_TIMING_STOP_STATE_COUNTER_IO_MASK(timing->ionum);
 378         reg |= timing->stop_state_counter <<
 379                ISPCSI2_TIMING_STOP_STATE_COUNTER_IO_SHIFT(timing->ionum);
 380
 381         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_TIMING);
 382 }
 383
 384 /*
 385  * csi2_irq_ctx_set - Enables CSI2 Context IRQs.
 386  * @enable: Enable/disable CSI2 Context interrupts
 387  */
 388 static void csi2_irq_ctx_set(struct isp_device *isp,
 389                              struct isp_csi2_device *csi2, int enable)
 390 {
 391         int i;
 392
 393         for (i = 0; i < 8; i++) {
 394                 isp_reg_writel(isp, ISPCSI2_CTX_IRQSTATUS_FE_IRQ, csi2->regs1,
 395                                ISPCSI2_CTX_IRQSTATUS(i));
 396                 if (enable)
 397                         isp_reg_set(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
 398                                     ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
 399                 else
 400                         isp_reg_clr(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
 401                                     ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
 402         }
 403 }
 404
 405 /*
 406  * csi2_irq_complexio1_set - Enables CSI2 ComplexIO IRQs.
 407  * @enable: Enable/disable CSI2 ComplexIO #1 interrupts
 408  */
 409 static void csi2_irq_complexio1_set(struct isp_device *isp,
 410                                     struct isp_csi2_device *csi2, int enable)
 411 {
 412         u32 reg;
 413         reg = ISPCSI2_PHY_IRQENABLE_STATEALLULPMEXIT |
 414                 ISPCSI2_PHY_IRQENABLE_STATEALLULPMENTER |
 415                 ISPCSI2_PHY_IRQENABLE_STATEULPM5 |
 416                 ISPCSI2_PHY_IRQENABLE_ERRCONTROL5 |
 417                 ISPCSI2_PHY_IRQENABLE_ERRESC5 |
 418                 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS5 |
 419                 ISPCSI2_PHY_IRQENABLE_ERRSOTHS5 |
 420                 ISPCSI2_PHY_IRQENABLE_STATEULPM4 |
 421                 ISPCSI2_PHY_IRQENABLE_ERRCONTROL4 |
 422                 ISPCSI2_PHY_IRQENABLE_ERRESC4 |
 423                 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS4 |
 424                 ISPCSI2_PHY_IRQENABLE_ERRSOTHS4 |
 425                 ISPCSI2_PHY_IRQENABLE_STATEULPM3 |
 426                 ISPCSI2_PHY_IRQENABLE_ERRCONTROL3 |
 427                 ISPCSI2_PHY_IRQENABLE_ERRESC3 |
 428                 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS3 |
 429                 ISPCSI2_PHY_IRQENABLE_ERRSOTHS3 |
 430                 ISPCSI2_PHY_IRQENABLE_STATEULPM2 |
 431                 ISPCSI2_PHY_IRQENABLE_ERRCONTROL2 |
 432                 ISPCSI2_PHY_IRQENABLE_ERRESC2 |
 433                 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS2 |
 434                 ISPCSI2_PHY_IRQENABLE_ERRSOTHS2 |
 435                 ISPCSI2_PHY_IRQENABLE_STATEULPM1 |
 436                 ISPCSI2_PHY_IRQENABLE_ERRCONTROL1 |
 437                 ISPCSI2_PHY_IRQENABLE_ERRESC1 |
 438                 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS1 |
 439                 ISPCSI2_PHY_IRQENABLE_ERRSOTHS1;
 440         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_PHY_IRQSTATUS);
 441         if (enable)
 442                 reg |= isp_reg_readl(isp, csi2->regs1, ISPCSI2_PHY_IRQENABLE);
 443         else
 444                 reg = 0;
 445         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_PHY_IRQENABLE);
 446 }
 447
 448 /*
 449  * csi2_irq_status_set - Enables CSI2 Status IRQs.
 450  * @enable: Enable/disable CSI2 Status interrupts
 451  */
 452 static void csi2_irq_status_set(struct isp_device *isp,
 453                                 struct isp_csi2_device *csi2, int enable)
 454 {
 455         u32 reg;
 456         reg = ISPCSI2_IRQSTATUS_OCP_ERR_IRQ |
 457                 ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ |
 458                 ISPCSI2_IRQSTATUS_ECC_CORRECTION_IRQ |
 459                 ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ |
 460                 ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ |
 461                 ISPCSI2_IRQSTATUS_COMPLEXIO1_ERR_IRQ |
 462                 ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ |
 463                 ISPCSI2_IRQSTATUS_CONTEXT(0);
 464         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_IRQSTATUS);
 465         if (enable)
 466                 reg |= isp_reg_readl(isp, csi2->regs1, ISPCSI2_IRQENABLE);
 467         else
 468                 reg = 0;
 469
 470         isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_IRQENABLE);
 471 }
 472
 473 /*
 474  * omap3isp_csi2_reset - Resets the CSI2 module.
 475  *
 476  * Must be called with the phy lock held.
 477  *
 478  * Returns 0 if successful, or -EBUSY if power command didn't respond.
 479  */
 480 int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
 481 {
 482         struct isp_device *isp = csi2->isp;
 483         u8 soft_reset_retries = 0;
 484         u32 reg;
 485         int i;
 486
 487         if (!csi2->available)
 488                 return -ENODEV;
 489
 490         if (csi2->phy->entity)
 491                 return -EBUSY;
 492
 493         isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
 494                     ISPCSI2_SYSCONFIG_SOFT_RESET);
 495
 496         do {
 497                 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_SYSSTATUS) &
 498                                     ISPCSI2_SYSSTATUS_RESET_DONE;
 499                 if (reg == ISPCSI2_SYSSTATUS_RESET_DONE)
 500                         break;
 501                 soft_reset_retries++;
 502                 if (soft_reset_retries < 5)
 503                         udelay(100);
 504         } while (soft_reset_retries < 5);
 505
 506         if (soft_reset_retries == 5) {
 507                 dev_err(isp->dev, "CSI2: Soft reset try count exceeded!\n");
 508                 return -EBUSY;
 509         }
 510
 511         if (isp->revision == ISP_REVISION_15_0)
 512                 isp_reg_set(isp, csi2->regs1, ISPCSI2_PHY_CFG,
 513                             ISPCSI2_PHY_CFG_RESET_CTRL);
 514
 515         i = 100;
 516         do {
 517                 reg = isp_reg_readl(isp, csi2->phy->phy_regs, ISPCSIPHY_REG1)
 518                     & ISPCSIPHY_REG1_RESET_DONE_CTRLCLK;
 519                 if (reg == ISPCSIPHY_REG1_RESET_DONE_CTRLCLK)
 520                         break;
 521                 udelay(100);
 522         } while (--i > 0);
 523
 524         if (i == 0) {
 525                 dev_err(isp->dev,
 526                         "CSI2: Reset for CSI2_96M_FCLK domain Failed!\n");
 527                 return -EBUSY;
 528         }
 529
 530         if (isp->autoidle)
 531                 isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
 532                                 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
 533                                 ISPCSI2_SYSCONFIG_AUTO_IDLE,
 534                                 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_SMART |
 535                                 ((isp->revision == ISP_REVISION_15_0) ?
 536                                  ISPCSI2_SYSCONFIG_AUTO_IDLE : 0));
 537         else
 538                 isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
 539                                 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
 540                                 ISPCSI2_SYSCONFIG_AUTO_IDLE,
 541                                 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_NO);
 542
 543         return 0;
 544 }
 545
 546 static int csi2_configure(struct isp_csi2_device *csi2)
 547 {
 548         struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
 549         const struct isp_bus_cfg *buscfg;
 550         struct isp_device *isp = csi2->isp;
 551         struct isp_csi2_timing_cfg *timing = &csi2->timing[0];
 552         struct v4l2_subdev *sensor;
 553         struct media_pad *pad;
 554
 555         /*
 556          * CSI2 fields that can be updated while the context has
 557          * been enabled or the interface has been enabled are not
 558          * updated dynamically currently. So we do not allow to
 559          * reconfigure if either has been enabled
 560          */
 561         if (csi2->contexts[0].enabled || csi2->ctrl.if_enable)
 562                 return -EBUSY;
 563
 564         pad = media_entity_remote_pad(&csi2->pads[CSI2_PAD_SINK]);
 565         sensor = media_entity_to_v4l2_subdev(pad->entity);
 566         buscfg = v4l2_subdev_to_bus_cfg(pipe->external);
 567
 568         csi2->frame_skip = 0;
 569         v4l2_subdev_call(sensor, sensor, g_skip_frames, &csi2->frame_skip);
 570
 571         csi2->ctrl.vp_out_ctrl =
 572                 clamp_t(unsigned int, pipe->l3_ick / pipe->external_rate - 1,
 573                         1, 3);
 574         dev_dbg(isp->dev, "%s: l3_ick %lu, external_rate %u, vp_out_ctrl %u\n",
 575                 __func__, pipe->l3_ick,  pipe->external_rate,
 576                 csi2->ctrl.vp_out_ctrl);
 577         csi2->ctrl.frame_mode = ISP_CSI2_FRAME_IMMEDIATE;
 578         csi2->ctrl.ecc_enable = buscfg->bus.csi2.crc;
 579
 580         timing->ionum = 1;
 581         timing->force_rx_mode = 1;
 582         timing->stop_state_16x = 1;
 583         timing->stop_state_4x = 1;
 584         timing->stop_state_counter = 0x1FF;
 585
 586         /*
 587          * The CSI2 receiver can't do any format conversion except DPCM
 588          * decompression, so every set_format call configures both pads
 589          * and enables DPCM decompression as a special case:
 590          */
 591         if (csi2->formats[CSI2_PAD_SINK].code !=
 592             csi2->formats[CSI2_PAD_SOURCE].code)
 593                 csi2->dpcm_decompress = true;
 594         else
 595                 csi2->dpcm_decompress = false;
 596
 597         csi2->contexts[0].format_id = csi2_ctx_map_format(csi2);
 598
 599         if (csi2->video_out.bpl_padding == 0)
 600                 csi2->contexts[0].data_offset = 0;
 601         else
 602                 csi2->contexts[0].data_offset = csi2->video_out.bpl_value;
 603
 604         /*
 605          * Enable end of frame and end of line signals generation for
 606          * context 0. These signals are generated from CSI2 receiver to
 607          * qualify the last pixel of a frame and the last pixel of a line.
 608          * Without enabling the signals CSI2 receiver writes data to memory
 609          * beyond buffer size and/or data line offset is not handled correctly.
 610          */
 611         csi2->contexts[0].eof_enabled = 1;
 612         csi2->contexts[0].eol_enabled = 1;
 613
 614         csi2_irq_complexio1_set(isp, csi2, 1);
 615         csi2_irq_ctx_set(isp, csi2, 1);
 616         csi2_irq_status_set(isp, csi2, 1);
 617
 618         /* Set configuration (timings, format and links) */
 619         csi2_timing_config(isp, csi2, timing);
 620         csi2_recv_config(isp, csi2, &csi2->ctrl);
 621         csi2_ctx_config(isp, csi2, &csi2->contexts[0]);
 622
 623         return 0;
 624 }
 625
 626 /*
 627  * csi2_print_status - Prints CSI2 debug information.
 628  */
 629 #define CSI2_PRINT_REGISTER(isp, regs, name)\
 630         dev_dbg(isp->dev, "###CSI2 " #name "=0x%08x\n", \
 631                 isp_reg_readl(isp, regs, ISPCSI2_##name))
 632
 633 static void csi2_print_status(struct isp_csi2_device *csi2)
 634 {
 635         struct isp_device *isp = csi2->isp;
 636
 637         if (!csi2->available)
 638                 return;
 639
 640         dev_dbg(isp->dev, "-------------CSI2 Register dump-------------\n");
 641
 642         CSI2_PRINT_REGISTER(isp, csi2->regs1, SYSCONFIG);
 643         CSI2_PRINT_REGISTER(isp, csi2->regs1, SYSSTATUS);
 644         CSI2_PRINT_REGISTER(isp, csi2->regs1, IRQENABLE);
 645         CSI2_PRINT_REGISTER(isp, csi2->regs1, IRQSTATUS);
 646         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTRL);
 647         CSI2_PRINT_REGISTER(isp, csi2->regs1, DBG_H);
 648         CSI2_PRINT_REGISTER(isp, csi2->regs1, GNQ);
 649         CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_CFG);
 650         CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_IRQSTATUS);
 651         CSI2_PRINT_REGISTER(isp, csi2->regs1, SHORT_PACKET);
 652         CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_IRQENABLE);
 653         CSI2_PRINT_REGISTER(isp, csi2->regs1, DBG_P);
 654         CSI2_PRINT_REGISTER(isp, csi2->regs1, TIMING);
 655         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL1(0));
 656         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL2(0));
 657         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_OFST(0));
 658         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_PING_ADDR(0));
 659         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_PONG_ADDR(0));
 660         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_IRQENABLE(0));
 661         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_IRQSTATUS(0));
 662         CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL3(0));
 663
 664         dev_dbg(isp->dev, "--------------------------------------------\n");
 665 }
 666
 667 /* -----------------------------------------------------------------------------
 668  * Interrupt handling
 669  */
 670
 671 /*
 672  * csi2_isr_buffer - Does buffer handling at end-of-frame
 673  * when writing to memory.
 674  */
 675 static void csi2_isr_buffer(struct isp_csi2_device *csi2)
 676 {
 677         struct isp_device *isp = csi2->isp;
 678         struct isp_buffer *buffer;
 679
 680         csi2_ctx_enable(isp, csi2, 0, 0);
 681
 682         buffer = omap3isp_video_buffer_next(&csi2->video_out);
 683
 684         /*
 685          * Let video queue operation restart engine if there is an underrun
 686          * condition.
 687          */
 688         if (buffer == NULL)
 689                 return;
 690
 691         csi2_set_outaddr(csi2, buffer->dma);
 692         csi2_ctx_enable(isp, csi2, 0, 1);
 693 }
 694
 695 static void csi2_isr_ctx(struct isp_csi2_device *csi2,
 696                          struct isp_csi2_ctx_cfg *ctx)
 697 {
 698         struct isp_device *isp = csi2->isp;
 699         unsigned int n = ctx->ctxnum;
 700         u32 status;
 701
 702         status = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
 703         isp_reg_writel(isp, status, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
 704
 705         if (!(status & ISPCSI2_CTX_IRQSTATUS_FE_IRQ))
 706                 return;
 707
 708         /* Skip interrupts until we reach the frame skip count. The CSI2 will be
 709          * automatically disabled, as the frame skip count has been programmed
 710          * in the CSI2_CTx_CTRL1::COUNT field, so re-enable it.
 711          *
 712          * It would have been nice to rely on the FRAME_NUMBER interrupt instead
 713          * but it turned out that the interrupt is only generated when the CSI2
 714          * writes to memory (the CSI2_CTx_CTRL1::COUNT field is decreased
 715          * correctly and reaches 0 when data is forwarded to the video port only
 716          * but no interrupt arrives). Maybe a CSI2 hardware bug.
 717          */
 718         if (csi2->frame_skip) {
 719                 csi2->frame_skip--;
 720                 if (csi2->frame_skip == 0) {
 721                         ctx->format_id = csi2_ctx_map_format(csi2);
 722                         csi2_ctx_config(isp, csi2, ctx);
 723                         csi2_ctx_enable(isp, csi2, n, 1);
 724                 }
 725                 return;
 726         }
 727
 728         if (csi2->output & CSI2_OUTPUT_MEMORY)
 729                 csi2_isr_buffer(csi2);
 730 }
 731
 732 /*
 733  * omap3isp_csi2_isr - CSI2 interrupt handling.
 734  */
 735 void omap3isp_csi2_isr(struct isp_csi2_device *csi2)
 736 {
 737         struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
 738         u32 csi2_irqstatus, cpxio1_irqstatus;
 739         struct isp_device *isp = csi2->isp;
 740
 741         if (!csi2->available)
 742                 return;
 743
 744         csi2_irqstatus = isp_reg_readl(isp, csi2->regs1, ISPCSI2_IRQSTATUS);
 745         isp_reg_writel(isp, csi2_irqstatus, csi2->regs1, ISPCSI2_IRQSTATUS);
 746
 747         /* Failure Cases */
 748         if (csi2_irqstatus & ISPCSI2_IRQSTATUS_COMPLEXIO1_ERR_IRQ) {
 749                 cpxio1_irqstatus = isp_reg_readl(isp, csi2->regs1,
 750                                                  ISPCSI2_PHY_IRQSTATUS);
 751                 isp_reg_writel(isp, cpxio1_irqstatus,
 752                                csi2->regs1, ISPCSI2_PHY_IRQSTATUS);
 753                 dev_dbg(isp->dev, "CSI2: ComplexIO Error IRQ %x\n",
 754                         cpxio1_irqstatus);
 755                 pipe->error = true;
 756         }
 757
 758         if (csi2_irqstatus & (ISPCSI2_IRQSTATUS_OCP_ERR_IRQ |
 759                               ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ |
 760                               ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ |
 761                               ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ |
 762                               ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ)) {
 763                 dev_dbg(isp->dev,
 764                         "CSI2 Err: OCP:%d, Short_pack:%d, ECC:%d, CPXIO2:%d, FIFO_OVF:%d,\n",
 765                         (csi2_irqstatus &
 766                          ISPCSI2_IRQSTATUS_OCP_ERR_IRQ) ? 1 : 0,
 767                         (csi2_irqstatus &
 768                          ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ) ? 1 : 0,
 769                         (csi2_irqstatus &
 770                          ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ) ? 1 : 0,
 771                         (csi2_irqstatus &
 772                          ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ) ? 1 : 0,
 773                         (csi2_irqstatus &
 774                          ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ) ? 1 : 0);
 775                 pipe->error = true;
 776         }
 777
 778         if (omap3isp_module_sync_is_stopping(&csi2->wait, &csi2->stopping))
 779                 return;
 780
 781         /* Successful cases */
 782         if (csi2_irqstatus & ISPCSI2_IRQSTATUS_CONTEXT(0))
 783                 csi2_isr_ctx(csi2, &csi2->contexts[0]);
 784
 785         if (csi2_irqstatus & ISPCSI2_IRQSTATUS_ECC_CORRECTION_IRQ)
 786                 dev_dbg(isp->dev, "CSI2: ECC correction done\n");
 787 }
 788
 789 /* -----------------------------------------------------------------------------
 790  * ISP video operations
 791  */
 792
 793 /*
 794  * csi2_queue - Queues the first buffer when using memory output
 795  * @video: The video node
 796  * @buffer: buffer to queue
 797  */
 798 static int csi2_queue(struct isp_video *video, struct isp_buffer *buffer)
 799 {
 800         struct isp_device *isp = video->isp;
 801         struct isp_csi2_device *csi2 = &isp->isp_csi2a;
 802
 803         csi2_set_outaddr(csi2, buffer->dma);
 804
 805         /*
 806          * If streaming was enabled before there was a buffer queued
 807          * or underrun happened in the ISR, the hardware was not enabled
 808          * and DMA queue flag ISP_VIDEO_DMAQUEUE_UNDERRUN is still set.
 809          * Enable it now.
 810          */
 811         if (csi2->video_out.dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) {
 812                 /* Enable / disable context 0 and IRQs */
 813                 csi2_if_enable(isp, csi2, 1);
 814                 csi2_ctx_enable(isp, csi2, 0, 1);
 815                 isp_video_dmaqueue_flags_clr(&csi2->video_out);
 816         }
 817
 818         return 0;
 819 }
 820
 821 static const struct isp_video_operations csi2_ispvideo_ops = {
 822         .queue = csi2_queue,
 823 };
 824
 825 /* -----------------------------------------------------------------------------
 826  * V4L2 subdev operations
 827  */
 828
 829 static struct v4l2_mbus_framefmt *
 830 __csi2_get_format(struct isp_csi2_device *csi2, struct v4l2_subdev_pad_config *cfg,
 831                   unsigned int pad, enum v4l2_subdev_format_whence which)
 832 {
 833         if (which == V4L2_SUBDEV_FORMAT_TRY)
 834                 return v4l2_subdev_get_try_format(&csi2->subdev, cfg, pad);
 835         else
 836                 return &csi2->formats[pad];
 837 }
 838
 839 static void
 840 csi2_try_format(struct isp_csi2_device *csi2, struct v4l2_subdev_pad_config *cfg,
 841                 unsigned int pad, struct v4l2_mbus_framefmt *fmt,
 842                 enum v4l2_subdev_format_whence which)
 843 {
 844         u32 pixelcode;
 845         struct v4l2_mbus_framefmt *format;
 846         const struct isp_format_info *info;
 847         unsigned int i;
 848
 849         switch (pad) {
 850         case CSI2_PAD_SINK:
 851                 /* Clamp the width and height to valid range (1-8191). */
 852                 for (i = 0; i < ARRAY_SIZE(csi2_input_fmts); i++) {
 853                         if (fmt->code == csi2_input_fmts[i])
 854                                 break;
 855                 }
 856
 857                 /* If not found, use SGRBG10 as default */
 858                 if (i >= ARRAY_SIZE(csi2_input_fmts))
 859                         fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
 860
 861                 fmt->width = clamp_t(u32, fmt->width, 1, 8191);
 862                 fmt->height = clamp_t(u32, fmt->height, 1, 8191);
 863                 break;
 864
 865         case CSI2_PAD_SOURCE:
 866                 /* Source format same as sink format, except for DPCM
 867                  * compression.
 868                  */
 869                 pixelcode = fmt->code;
 870                 format = __csi2_get_format(csi2, cfg, CSI2_PAD_SINK, which);
 871                 memcpy(fmt, format, sizeof(*fmt));
 872
 873                 /*
 874                  * Only Allow DPCM decompression, and check that the
 875                  * pattern is preserved
 876                  */
 877                 info = omap3isp_video_format_info(fmt->code);
 878                 if (info->uncompressed == pixelcode)
 879                         fmt->code = pixelcode;
 880                 break;
 881         }
 882
 883         /* RGB, non-interlaced */
 884         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 885         fmt->field = V4L2_FIELD_NONE;
 886 }
 887
 888 /*
 889  * csi2_enum_mbus_code - Handle pixel format enumeration
 890  * @sd     : pointer to v4l2 subdev structure
 891  * @cfg: V4L2 subdev pad configuration
 892  * @code   : pointer to v4l2_subdev_mbus_code_enum structure
 893  * return -EINVAL or zero on success
 894  */
 895 static int csi2_enum_mbus_code(struct v4l2_subdev *sd,
 896                                struct v4l2_subdev_pad_config *cfg,
 897                                struct v4l2_subdev_mbus_code_enum *code)
 898 {
 899         struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
 900         struct v4l2_mbus_framefmt *format;
 901         const struct isp_format_info *info;
 902
 903         if (code->pad == CSI2_PAD_SINK) {
 904                 if (code->index >= ARRAY_SIZE(csi2_input_fmts))
 905                         return -EINVAL;
 906
 907                 code->code = csi2_input_fmts[code->index];
 908         } else {
 909                 format = __csi2_get_format(csi2, cfg, CSI2_PAD_SINK,
 910                                            code->which);
 911                 switch (code->index) {
 912                 case 0:
 913                         /* Passthrough sink pad code */
 914                         code->code = format->code;
 915                         break;
 916                 case 1:
 917                         /* Uncompressed code */
 918                         info = omap3isp_video_format_info(format->code);
 919                         if (info->uncompressed == format->code)
 920                                 return -EINVAL;
 921
 922                         code->code = info->uncompressed;
 923                         break;
 924                 default:
 925                         return -EINVAL;
 926                 }
 927         }
 928
 929         return 0;
 930 }
 931
 932 static int csi2_enum_frame_size(struct v4l2_subdev *sd,
 933                                 struct v4l2_subdev_pad_config *cfg,
 934                                 struct v4l2_subdev_frame_size_enum *fse)
 935 {
 936         struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
 937         struct v4l2_mbus_framefmt format;
 938
 939         if (fse->index != 0)
 940                 return -EINVAL;
 941
 942         format.code = fse->code;
 943         format.width = 1;
 944         format.height = 1;
 945         csi2_try_format(csi2, cfg, fse->pad, &format, fse->which);
 946         fse->min_width = format.width;
 947         fse->min_height = format.height;
 948
 949         if (format.code != fse->code)
 950                 return -EINVAL;
 951
 952         format.code = fse->code;
 953         format.width = -1;
 954         format.height = -1;
 955         csi2_try_format(csi2, cfg, fse->pad, &format, fse->which);
 956         fse->max_width = format.width;
 957         fse->max_height = format.height;
 958
 959         return 0;
 960 }
 961
 962 /*
 963  * csi2_get_format - Handle get format by pads subdev method
 964  * @sd : pointer to v4l2 subdev structure
 965  * @cfg: V4L2 subdev pad configuration
 966  * @fmt: pointer to v4l2 subdev format structure
 967  * return -EINVAL or zero on success
 968  */
 969 static int csi2_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
 970                            struct v4l2_subdev_format *fmt)
 971 {
 972         struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
 973         struct v4l2_mbus_framefmt *format;
 974
 975         format = __csi2_get_format(csi2, cfg, fmt->pad, fmt->which);
 976         if (format == NULL)
 977                 return -EINVAL;
 978
 979         fmt->format = *format;
 980         return 0;
 981 }
 982
 983 /*
 984  * csi2_set_format - Handle set format by pads subdev method
 985  * @sd : pointer to v4l2 subdev structure
 986  * @cfg: V4L2 subdev pad configuration
 987  * @fmt: pointer to v4l2 subdev format structure
 988  * return -EINVAL or zero on success
 989  */
 990 static int csi2_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
 991                            struct v4l2_subdev_format *fmt)
 992 {
 993         struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
 994         struct v4l2_mbus_framefmt *format;
 995
 996         format = __csi2_get_format(csi2, cfg, fmt->pad, fmt->which);
 997         if (format == NULL)
 998                 return -EINVAL;
 999
1000         csi2_try_format(csi2, cfg, fmt->pad, &fmt->format, fmt->which);
1001         *format = fmt->format;
1002
1003         /* Propagate the format from sink to source */
1004         if (fmt->pad == CSI2_PAD_SINK) {
1005                 format = __csi2_get_format(csi2, cfg, CSI2_PAD_SOURCE,
1006                                            fmt->which);
1007                 *format = fmt->format;
1008                 csi2_try_format(csi2, cfg, CSI2_PAD_SOURCE, format, fmt->which);
1009         }
1010
1011         return 0;
1012 }
1013
1014 /*
1015  * csi2_init_formats - Initialize formats on all pads
1016  * @sd: ISP CSI2 V4L2 subdevice
1017  * @fh: V4L2 subdev file handle
1018  *
1019  * Initialize all pad formats with default values. If fh is not NULL, try
1020  * formats are initialized on the file handle. Otherwise active formats are
1021  * initialized on the device.
1022  */
1023 static int csi2_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1024 {
1025         struct v4l2_subdev_format format;
1026
1027         memset(&format, 0, sizeof(format));
1028         format.pad = CSI2_PAD_SINK;
1029         format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
1030         format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
1031         format.format.width = 4096;
1032         format.format.height = 4096;
1033         csi2_set_format(sd, fh ? fh->pad : NULL, &format);
1034
1035         return 0;
1036 }
1037
1038 /*
1039  * csi2_set_stream - Enable/Disable streaming on the CSI2 module
1040  * @sd: ISP CSI2 V4L2 subdevice
1041  * @enable: ISP pipeline stream state
1042  *
1043  * Return 0 on success or a negative error code otherwise.
1044  */
1045 static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
1046 {
1047         struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
1048         struct isp_device *isp = csi2->isp;
1049         struct isp_video *video_out = &csi2->video_out;
1050
1051         switch (enable) {
1052         case ISP_PIPELINE_STREAM_CONTINUOUS:
1053                 if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0)
1054                         return -ENODEV;
1055                 if (csi2->output & CSI2_OUTPUT_MEMORY)
1056                         omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
1057                 csi2_configure(csi2);
1058                 csi2_print_status(csi2);
1059
1060                 /*
1061                  * When outputting to memory with no buffer available, let the
1062                  * buffer queue handler start the hardware. A DMA queue flag
1063                  * ISP_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
1064                  * a buffer available.
1065                  */
1066                 if (csi2->output & CSI2_OUTPUT_MEMORY &&
1067                     !(video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED))
1068                         break;
1069                 /* Enable context 0 and IRQs */
1070                 atomic_set(&csi2->stopping, 0);
1071                 csi2_ctx_enable(isp, csi2, 0, 1);
1072                 csi2_if_enable(isp, csi2, 1);
1073                 isp_video_dmaqueue_flags_clr(video_out);
1074                 break;
1075
1076         case ISP_PIPELINE_STREAM_STOPPED:
1077                 if (csi2->state == ISP_PIPELINE_STREAM_STOPPED)
1078                         return 0;
1079                 if (omap3isp_module_sync_idle(&sd->entity, &csi2->wait,
1080                                               &csi2->stopping))
1081                         dev_dbg(isp->dev, "%s: module stop timeout.\n",
1082                                 sd->name);
1083                 csi2_ctx_enable(isp, csi2, 0, 0);
1084                 csi2_if_enable(isp, csi2, 0);
1085                 csi2_irq_ctx_set(isp, csi2, 0);
1086                 omap3isp_csiphy_release(csi2->phy);
1087                 isp_video_dmaqueue_flags_clr(video_out);
1088                 omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
1089                 break;
1090         }
1091
1092         csi2->state = enable;
1093         return 0;
1094 }
1095
1096 /* subdev video operations */
1097 static const struct v4l2_subdev_video_ops csi2_video_ops = {
1098         .s_stream = csi2_set_stream,
1099 };
1100
1101 /* subdev pad operations */
1102 static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
1103         .enum_mbus_code = csi2_enum_mbus_code,
1104         .enum_frame_size = csi2_enum_frame_size,
1105         .get_fmt = csi2_get_format,
1106         .set_fmt = csi2_set_format,
1107 };
1108
1109 /* subdev operations */
1110 static const struct v4l2_subdev_ops csi2_ops = {
1111         .video = &csi2_video_ops,
1112         .pad = &csi2_pad_ops,
1113 };
1114
1115 /* subdev internal operations */
1116 static const struct v4l2_subdev_internal_ops csi2_internal_ops = {
1117         .open = csi2_init_formats,
1118 };
1119
1120 /* -----------------------------------------------------------------------------
1121  * Media entity operations
1122  */
1123
1124 /*
1125  * csi2_link_setup - Setup CSI2 connections.
1126  * @entity : Pointer to media entity structure
1127  * @local  : Pointer to local pad array
1128  * @remote : Pointer to remote pad array
1129  * @flags  : Link flags
1130  * return -EINVAL or zero on success
1131  */
1132 static int csi2_link_setup(struct media_entity *entity,
1133                            const struct media_pad *local,
1134                            const struct media_pad *remote, u32 flags)
1135 {
1136         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1137         struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
1138         struct isp_csi2_ctrl_cfg *ctrl = &csi2->ctrl;
1139         unsigned int index = local->index;
1140
1141         /*
1142          * The ISP core doesn't support pipelines with multiple video outputs.
1143          * Revisit this when it will be implemented, and return -EBUSY for now.
1144          */
1145
1146         /* FIXME: this is actually a hack! */
1147         if (is_media_entity_v4l2_subdev(remote->entity))
1148                 index |= 2 << 16;
1149
1150         switch (index) {
1151         case CSI2_PAD_SOURCE:
1152                 if (flags & MEDIA_LNK_FL_ENABLED) {
1153                         if (csi2->output & ~CSI2_OUTPUT_MEMORY)
1154                                 return -EBUSY;
1155                         csi2->output |= CSI2_OUTPUT_MEMORY;
1156                 } else {
1157                         csi2->output &= ~CSI2_OUTPUT_MEMORY;
1158                 }
1159                 break;
1160
1161         case CSI2_PAD_SOURCE | 2 << 16:
1162                 if (flags & MEDIA_LNK_FL_ENABLED) {
1163                         if (csi2->output & ~CSI2_OUTPUT_CCDC)
1164                                 return -EBUSY;
1165                         csi2->output |= CSI2_OUTPUT_CCDC;
1166                 } else {
1167                         csi2->output &= ~CSI2_OUTPUT_CCDC;
1168                 }
1169                 break;
1170
1171         default:
1172                 /* Link from camera to CSI2 is fixed... */
1173                 return -EINVAL;
1174         }
1175
1176         ctrl->vp_only_enable =
1177                 (csi2->output & CSI2_OUTPUT_MEMORY) ? false : true;
1178         ctrl->vp_clk_enable = !!(csi2->output & CSI2_OUTPUT_CCDC);
1179
1180         return 0;
1181 }
1182
1183 /* media operations */
1184 static const struct media_entity_operations csi2_media_ops = {
1185         .link_setup = csi2_link_setup,
1186         .link_validate = v4l2_subdev_link_validate,
1187 };
1188
1189 void omap3isp_csi2_unregister_entities(struct isp_csi2_device *csi2)
1190 {
1191         v4l2_device_unregister_subdev(&csi2->subdev);
1192         omap3isp_video_unregister(&csi2->video_out);
1193 }
1194
1195 int omap3isp_csi2_register_entities(struct isp_csi2_device *csi2,
1196                                     struct v4l2_device *vdev)
1197 {
1198         int ret;
1199
1200         /* Register the subdev and video nodes. */
1201         csi2->subdev.dev = vdev->mdev->dev;
1202         ret = v4l2_device_register_subdev(vdev, &csi2->subdev);
1203         if (ret < 0)
1204                 goto error;
1205
1206         ret = omap3isp_video_register(&csi2->video_out, vdev);
1207         if (ret < 0)
1208                 goto error;
1209
1210         return 0;
1211
1212 error:
1213         omap3isp_csi2_unregister_entities(csi2);
1214         return ret;
1215 }
1216
1217 /* -----------------------------------------------------------------------------
1218  * ISP CSI2 initialisation and cleanup
1219  */
1220
1221 /*
1222  * csi2_init_entities - Initialize subdev and media entity.
1223  * @csi2: Pointer to csi2 structure.
1224  * return -ENOMEM or zero on success
1225  */
1226 static int csi2_init_entities(struct isp_csi2_device *csi2)
1227 {
1228         struct v4l2_subdev *sd = &csi2->subdev;
1229         struct media_pad *pads = csi2->pads;
1230         struct media_entity *me = &sd->entity;
1231         int ret;
1232
1233         v4l2_subdev_init(sd, &csi2_ops);
1234         sd->internal_ops = &csi2_internal_ops;
1235         strscpy(sd->name, "OMAP3 ISP CSI2a", sizeof(sd->name));
1236
1237         sd->grp_id = 1 << 16;   /* group ID for isp subdevs */
1238         v4l2_set_subdevdata(sd, csi2);
1239         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1240
1241         pads[CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
1242         pads[CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK
1243                                     | MEDIA_PAD_FL_MUST_CONNECT;
1244
1245         me->ops = &csi2_media_ops;
1246         ret = media_entity_pads_init(me, CSI2_PADS_NUM, pads);
1247         if (ret < 0)
1248                 return ret;
1249
1250         csi2_init_formats(sd, NULL);
1251
1252         /* Video device node */
1253         csi2->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1254         csi2->video_out.ops = &csi2_ispvideo_ops;
1255         csi2->video_out.bpl_alignment = 32;
1256         csi2->video_out.bpl_zero_padding = 1;
1257         csi2->video_out.bpl_max = 0x1ffe0;
1258         csi2->video_out.isp = csi2->isp;
1259         csi2->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
1260
1261         ret = omap3isp_video_init(&csi2->video_out, "CSI2a");
1262         if (ret < 0)
1263                 goto error_video;
1264
1265         return 0;
1266
1267 error_video:
1268         media_entity_cleanup(&csi2->subdev.entity);
1269         return ret;
1270 }
1271
1272 /*
1273  * omap3isp_csi2_init - Routine for module driver init
1274  */
1275 int omap3isp_csi2_init(struct isp_device *isp)
1276 {
1277         struct isp_csi2_device *csi2a = &isp->isp_csi2a;
1278         struct isp_csi2_device *csi2c = &isp->isp_csi2c;
1279         int ret;
1280
1281         csi2a->isp = isp;
1282         csi2a->available = 1;
1283         csi2a->regs1 = OMAP3_ISP_IOMEM_CSI2A_REGS1;
1284         csi2a->regs2 = OMAP3_ISP_IOMEM_CSI2A_REGS2;
1285         csi2a->phy = &isp->isp_csiphy2;
1286         csi2a->state = ISP_PIPELINE_STREAM_STOPPED;
1287         init_waitqueue_head(&csi2a->wait);
1288
1289         ret = csi2_init_entities(csi2a);
1290         if (ret < 0)
1291                 return ret;
1292
1293         if (isp->revision == ISP_REVISION_15_0) {
1294                 csi2c->isp = isp;
1295                 csi2c->available = 1;
1296                 csi2c->regs1 = OMAP3_ISP_IOMEM_CSI2C_REGS1;
1297                 csi2c->regs2 = OMAP3_ISP_IOMEM_CSI2C_REGS2;
1298                 csi2c->phy = &isp->isp_csiphy1;
1299                 csi2c->state = ISP_PIPELINE_STREAM_STOPPED;
1300                 init_waitqueue_head(&csi2c->wait);
1301         }
1302
1303         return 0;
1304 }
1305
1306 /*
1307  * omap3isp_csi2_cleanup - Routine for module driver cleanup
1308  */
1309 void omap3isp_csi2_cleanup(struct isp_device *isp)
1310 {
1311         struct isp_csi2_device *csi2a = &isp->isp_csi2a;
1312
1313         omap3isp_video_cleanup(&csi2a->video_out);
1314         media_entity_cleanup(&csi2a->subdev.entity);
1315 }