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_pad_remote_pad_first(&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, 831 struct v4l2_subdev_state *sd_state, 832 unsigned int pad, enum v4l2_subdev_format_whence which) 833 { 834 if (which == V4L2_SUBDEV_FORMAT_TRY) 835 return v4l2_subdev_get_try_format(&csi2->subdev, sd_state, 836 pad); 837 else 838 return &csi2->formats[pad]; 839 } 840 841 static void 842 csi2_try_format(struct isp_csi2_device *csi2, 843 struct v4l2_subdev_state *sd_state, 844 unsigned int pad, struct v4l2_mbus_framefmt *fmt, 845 enum v4l2_subdev_format_whence which) 846 { 847 u32 pixelcode; 848 struct v4l2_mbus_framefmt *format; 849 const struct isp_format_info *info; 850 unsigned int i; 851 852 switch (pad) { 853 case CSI2_PAD_SINK: 854 /* Clamp the width and height to valid range (1-8191). */ 855 for (i = 0; i < ARRAY_SIZE(csi2_input_fmts); i++) { 856 if (fmt->code == csi2_input_fmts[i]) 857 break; 858 } 859 860 /* If not found, use SGRBG10 as default */ 861 if (i >= ARRAY_SIZE(csi2_input_fmts)) 862 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 863 864 fmt->width = clamp_t(u32, fmt->width, 1, 8191); 865 fmt->height = clamp_t(u32, fmt->height, 1, 8191); 866 break; 867 868 case CSI2_PAD_SOURCE: 869 /* Source format same as sink format, except for DPCM 870 * compression. 871 */ 872 pixelcode = fmt->code; 873 format = __csi2_get_format(csi2, sd_state, CSI2_PAD_SINK, 874 which); 875 memcpy(fmt, format, sizeof(*fmt)); 876 877 /* 878 * Only Allow DPCM decompression, and check that the 879 * pattern is preserved 880 */ 881 info = omap3isp_video_format_info(fmt->code); 882 if (info->uncompressed == pixelcode) 883 fmt->code = pixelcode; 884 break; 885 } 886 887 /* RGB, non-interlaced */ 888 fmt->colorspace = V4L2_COLORSPACE_SRGB; 889 fmt->field = V4L2_FIELD_NONE; 890 } 891 892 /* 893 * csi2_enum_mbus_code - Handle pixel format enumeration 894 * @sd : pointer to v4l2 subdev structure 895 * @cfg: V4L2 subdev pad configuration 896 * @code : pointer to v4l2_subdev_mbus_code_enum structure 897 * return -EINVAL or zero on success 898 */ 899 static int csi2_enum_mbus_code(struct v4l2_subdev *sd, 900 struct v4l2_subdev_state *sd_state, 901 struct v4l2_subdev_mbus_code_enum *code) 902 { 903 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd); 904 struct v4l2_mbus_framefmt *format; 905 const struct isp_format_info *info; 906 907 if (code->pad == CSI2_PAD_SINK) { 908 if (code->index >= ARRAY_SIZE(csi2_input_fmts)) 909 return -EINVAL; 910 911 code->code = csi2_input_fmts[code->index]; 912 } else { 913 format = __csi2_get_format(csi2, sd_state, CSI2_PAD_SINK, 914 code->which); 915 switch (code->index) { 916 case 0: 917 /* Passthrough sink pad code */ 918 code->code = format->code; 919 break; 920 case 1: 921 /* Uncompressed code */ 922 info = omap3isp_video_format_info(format->code); 923 if (info->uncompressed == format->code) 924 return -EINVAL; 925 926 code->code = info->uncompressed; 927 break; 928 default: 929 return -EINVAL; 930 } 931 } 932 933 return 0; 934 } 935 936 static int csi2_enum_frame_size(struct v4l2_subdev *sd, 937 struct v4l2_subdev_state *sd_state, 938 struct v4l2_subdev_frame_size_enum *fse) 939 { 940 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd); 941 struct v4l2_mbus_framefmt format; 942 943 if (fse->index != 0) 944 return -EINVAL; 945 946 format.code = fse->code; 947 format.width = 1; 948 format.height = 1; 949 csi2_try_format(csi2, sd_state, fse->pad, &format, fse->which); 950 fse->min_width = format.width; 951 fse->min_height = format.height; 952 953 if (format.code != fse->code) 954 return -EINVAL; 955 956 format.code = fse->code; 957 format.width = -1; 958 format.height = -1; 959 csi2_try_format(csi2, sd_state, fse->pad, &format, fse->which); 960 fse->max_width = format.width; 961 fse->max_height = format.height; 962 963 return 0; 964 } 965 966 /* 967 * csi2_get_format - Handle get format by pads subdev method 968 * @sd : pointer to v4l2 subdev structure 969 * @cfg: V4L2 subdev pad configuration 970 * @fmt: pointer to v4l2 subdev format structure 971 * return -EINVAL or zero on success 972 */ 973 static int csi2_get_format(struct v4l2_subdev *sd, 974 struct v4l2_subdev_state *sd_state, 975 struct v4l2_subdev_format *fmt) 976 { 977 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd); 978 struct v4l2_mbus_framefmt *format; 979 980 format = __csi2_get_format(csi2, sd_state, fmt->pad, fmt->which); 981 if (format == NULL) 982 return -EINVAL; 983 984 fmt->format = *format; 985 return 0; 986 } 987 988 /* 989 * csi2_set_format - Handle set format by pads subdev method 990 * @sd : pointer to v4l2 subdev structure 991 * @cfg: V4L2 subdev pad configuration 992 * @fmt: pointer to v4l2 subdev format structure 993 * return -EINVAL or zero on success 994 */ 995 static int csi2_set_format(struct v4l2_subdev *sd, 996 struct v4l2_subdev_state *sd_state, 997 struct v4l2_subdev_format *fmt) 998 { 999 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd); 1000 struct v4l2_mbus_framefmt *format; 1001 1002 format = __csi2_get_format(csi2, sd_state, fmt->pad, fmt->which); 1003 if (format == NULL) 1004 return -EINVAL; 1005 1006 csi2_try_format(csi2, sd_state, fmt->pad, &fmt->format, fmt->which); 1007 *format = fmt->format; 1008 1009 /* Propagate the format from sink to source */ 1010 if (fmt->pad == CSI2_PAD_SINK) { 1011 format = __csi2_get_format(csi2, sd_state, CSI2_PAD_SOURCE, 1012 fmt->which); 1013 *format = fmt->format; 1014 csi2_try_format(csi2, sd_state, CSI2_PAD_SOURCE, format, 1015 fmt->which); 1016 } 1017 1018 return 0; 1019 } 1020 1021 /* 1022 * csi2_init_formats - Initialize formats on all pads 1023 * @sd: ISP CSI2 V4L2 subdevice 1024 * @fh: V4L2 subdev file handle 1025 * 1026 * Initialize all pad formats with default values. If fh is not NULL, try 1027 * formats are initialized on the file handle. Otherwise active formats are 1028 * initialized on the device. 1029 */ 1030 static int csi2_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 1031 { 1032 struct v4l2_subdev_format format; 1033 1034 memset(&format, 0, sizeof(format)); 1035 format.pad = CSI2_PAD_SINK; 1036 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; 1037 format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10; 1038 format.format.width = 4096; 1039 format.format.height = 4096; 1040 csi2_set_format(sd, fh ? fh->state : NULL, &format); 1041 1042 return 0; 1043 } 1044 1045 /* 1046 * csi2_set_stream - Enable/Disable streaming on the CSI2 module 1047 * @sd: ISP CSI2 V4L2 subdevice 1048 * @enable: ISP pipeline stream state 1049 * 1050 * Return 0 on success or a negative error code otherwise. 1051 */ 1052 static int csi2_set_stream(struct v4l2_subdev *sd, int enable) 1053 { 1054 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd); 1055 struct isp_device *isp = csi2->isp; 1056 struct isp_video *video_out = &csi2->video_out; 1057 1058 switch (enable) { 1059 case ISP_PIPELINE_STREAM_CONTINUOUS: 1060 if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0) 1061 return -ENODEV; 1062 if (csi2->output & CSI2_OUTPUT_MEMORY) 1063 omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE); 1064 csi2_configure(csi2); 1065 csi2_print_status(csi2); 1066 1067 /* 1068 * When outputting to memory with no buffer available, let the 1069 * buffer queue handler start the hardware. A DMA queue flag 1070 * ISP_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is 1071 * a buffer available. 1072 */ 1073 if (csi2->output & CSI2_OUTPUT_MEMORY && 1074 !(video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED)) 1075 break; 1076 /* Enable context 0 and IRQs */ 1077 atomic_set(&csi2->stopping, 0); 1078 csi2_ctx_enable(isp, csi2, 0, 1); 1079 csi2_if_enable(isp, csi2, 1); 1080 isp_video_dmaqueue_flags_clr(video_out); 1081 break; 1082 1083 case ISP_PIPELINE_STREAM_STOPPED: 1084 if (csi2->state == ISP_PIPELINE_STREAM_STOPPED) 1085 return 0; 1086 if (omap3isp_module_sync_idle(&sd->entity, &csi2->wait, 1087 &csi2->stopping)) 1088 dev_dbg(isp->dev, "%s: module stop timeout.\n", 1089 sd->name); 1090 csi2_ctx_enable(isp, csi2, 0, 0); 1091 csi2_if_enable(isp, csi2, 0); 1092 csi2_irq_ctx_set(isp, csi2, 0); 1093 omap3isp_csiphy_release(csi2->phy); 1094 isp_video_dmaqueue_flags_clr(video_out); 1095 omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_CSI2A_WRITE); 1096 break; 1097 } 1098 1099 csi2->state = enable; 1100 return 0; 1101 } 1102 1103 /* subdev video operations */ 1104 static const struct v4l2_subdev_video_ops csi2_video_ops = { 1105 .s_stream = csi2_set_stream, 1106 }; 1107 1108 /* subdev pad operations */ 1109 static const struct v4l2_subdev_pad_ops csi2_pad_ops = { 1110 .enum_mbus_code = csi2_enum_mbus_code, 1111 .enum_frame_size = csi2_enum_frame_size, 1112 .get_fmt = csi2_get_format, 1113 .set_fmt = csi2_set_format, 1114 }; 1115 1116 /* subdev operations */ 1117 static const struct v4l2_subdev_ops csi2_ops = { 1118 .video = &csi2_video_ops, 1119 .pad = &csi2_pad_ops, 1120 }; 1121 1122 /* subdev internal operations */ 1123 static const struct v4l2_subdev_internal_ops csi2_internal_ops = { 1124 .open = csi2_init_formats, 1125 }; 1126 1127 /* ----------------------------------------------------------------------------- 1128 * Media entity operations 1129 */ 1130 1131 /* 1132 * csi2_link_setup - Setup CSI2 connections. 1133 * @entity : Pointer to media entity structure 1134 * @local : Pointer to local pad array 1135 * @remote : Pointer to remote pad array 1136 * @flags : Link flags 1137 * return -EINVAL or zero on success 1138 */ 1139 static int csi2_link_setup(struct media_entity *entity, 1140 const struct media_pad *local, 1141 const struct media_pad *remote, u32 flags) 1142 { 1143 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1144 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd); 1145 struct isp_csi2_ctrl_cfg *ctrl = &csi2->ctrl; 1146 unsigned int index = local->index; 1147 1148 /* 1149 * The ISP core doesn't support pipelines with multiple video outputs. 1150 * Revisit this when it will be implemented, and return -EBUSY for now. 1151 */ 1152 1153 /* FIXME: this is actually a hack! */ 1154 if (is_media_entity_v4l2_subdev(remote->entity)) 1155 index |= 2 << 16; 1156 1157 switch (index) { 1158 case CSI2_PAD_SOURCE: 1159 if (flags & MEDIA_LNK_FL_ENABLED) { 1160 if (csi2->output & ~CSI2_OUTPUT_MEMORY) 1161 return -EBUSY; 1162 csi2->output |= CSI2_OUTPUT_MEMORY; 1163 } else { 1164 csi2->output &= ~CSI2_OUTPUT_MEMORY; 1165 } 1166 break; 1167 1168 case CSI2_PAD_SOURCE | 2 << 16: 1169 if (flags & MEDIA_LNK_FL_ENABLED) { 1170 if (csi2->output & ~CSI2_OUTPUT_CCDC) 1171 return -EBUSY; 1172 csi2->output |= CSI2_OUTPUT_CCDC; 1173 } else { 1174 csi2->output &= ~CSI2_OUTPUT_CCDC; 1175 } 1176 break; 1177 1178 default: 1179 /* Link from camera to CSI2 is fixed... */ 1180 return -EINVAL; 1181 } 1182 1183 ctrl->vp_only_enable = 1184 (csi2->output & CSI2_OUTPUT_MEMORY) ? false : true; 1185 ctrl->vp_clk_enable = !!(csi2->output & CSI2_OUTPUT_CCDC); 1186 1187 return 0; 1188 } 1189 1190 /* media operations */ 1191 static const struct media_entity_operations csi2_media_ops = { 1192 .link_setup = csi2_link_setup, 1193 .link_validate = v4l2_subdev_link_validate, 1194 }; 1195 1196 void omap3isp_csi2_unregister_entities(struct isp_csi2_device *csi2) 1197 { 1198 v4l2_device_unregister_subdev(&csi2->subdev); 1199 omap3isp_video_unregister(&csi2->video_out); 1200 } 1201 1202 int omap3isp_csi2_register_entities(struct isp_csi2_device *csi2, 1203 struct v4l2_device *vdev) 1204 { 1205 int ret; 1206 1207 /* Register the subdev and video nodes. */ 1208 csi2->subdev.dev = vdev->mdev->dev; 1209 ret = v4l2_device_register_subdev(vdev, &csi2->subdev); 1210 if (ret < 0) 1211 goto error; 1212 1213 ret = omap3isp_video_register(&csi2->video_out, vdev); 1214 if (ret < 0) 1215 goto error; 1216 1217 return 0; 1218 1219 error: 1220 omap3isp_csi2_unregister_entities(csi2); 1221 return ret; 1222 } 1223 1224 /* ----------------------------------------------------------------------------- 1225 * ISP CSI2 initialisation and cleanup 1226 */ 1227 1228 /* 1229 * csi2_init_entities - Initialize subdev and media entity. 1230 * @csi2: Pointer to csi2 structure. 1231 * return -ENOMEM or zero on success 1232 */ 1233 static int csi2_init_entities(struct isp_csi2_device *csi2) 1234 { 1235 struct v4l2_subdev *sd = &csi2->subdev; 1236 struct media_pad *pads = csi2->pads; 1237 struct media_entity *me = &sd->entity; 1238 int ret; 1239 1240 v4l2_subdev_init(sd, &csi2_ops); 1241 sd->internal_ops = &csi2_internal_ops; 1242 strscpy(sd->name, "OMAP3 ISP CSI2a", sizeof(sd->name)); 1243 1244 sd->grp_id = 1 << 16; /* group ID for isp subdevs */ 1245 v4l2_set_subdevdata(sd, csi2); 1246 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1247 1248 pads[CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; 1249 pads[CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK 1250 | MEDIA_PAD_FL_MUST_CONNECT; 1251 1252 me->ops = &csi2_media_ops; 1253 ret = media_entity_pads_init(me, CSI2_PADS_NUM, pads); 1254 if (ret < 0) 1255 return ret; 1256 1257 csi2_init_formats(sd, NULL); 1258 1259 /* Video device node */ 1260 csi2->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1261 csi2->video_out.ops = &csi2_ispvideo_ops; 1262 csi2->video_out.bpl_alignment = 32; 1263 csi2->video_out.bpl_zero_padding = 1; 1264 csi2->video_out.bpl_max = 0x1ffe0; 1265 csi2->video_out.isp = csi2->isp; 1266 csi2->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3; 1267 1268 ret = omap3isp_video_init(&csi2->video_out, "CSI2a"); 1269 if (ret < 0) 1270 goto error_video; 1271 1272 return 0; 1273 1274 error_video: 1275 media_entity_cleanup(&csi2->subdev.entity); 1276 return ret; 1277 } 1278 1279 /* 1280 * omap3isp_csi2_init - Routine for module driver init 1281 */ 1282 int omap3isp_csi2_init(struct isp_device *isp) 1283 { 1284 struct isp_csi2_device *csi2a = &isp->isp_csi2a; 1285 struct isp_csi2_device *csi2c = &isp->isp_csi2c; 1286 int ret; 1287 1288 csi2a->isp = isp; 1289 csi2a->available = 1; 1290 csi2a->regs1 = OMAP3_ISP_IOMEM_CSI2A_REGS1; 1291 csi2a->regs2 = OMAP3_ISP_IOMEM_CSI2A_REGS2; 1292 csi2a->phy = &isp->isp_csiphy2; 1293 csi2a->state = ISP_PIPELINE_STREAM_STOPPED; 1294 init_waitqueue_head(&csi2a->wait); 1295 1296 ret = csi2_init_entities(csi2a); 1297 if (ret < 0) 1298 return ret; 1299 1300 if (isp->revision == ISP_REVISION_15_0) { 1301 csi2c->isp = isp; 1302 csi2c->available = 1; 1303 csi2c->regs1 = OMAP3_ISP_IOMEM_CSI2C_REGS1; 1304 csi2c->regs2 = OMAP3_ISP_IOMEM_CSI2C_REGS2; 1305 csi2c->phy = &isp->isp_csiphy1; 1306 csi2c->state = ISP_PIPELINE_STREAM_STOPPED; 1307 init_waitqueue_head(&csi2c->wait); 1308 } 1309 1310 return 0; 1311 } 1312 1313 /* 1314 * omap3isp_csi2_cleanup - Routine for module driver cleanup 1315 */ 1316 void omap3isp_csi2_cleanup(struct isp_device *isp) 1317 { 1318 struct isp_csi2_device *csi2a = &isp->isp_csi2a; 1319 1320 omap3isp_video_cleanup(&csi2a->video_out); 1321 media_entity_cleanup(&csi2a->subdev.entity); 1322 } 1323