1/* 2 * isp.c 3 * 4 * TI OMAP3 ISP - Core 5 * 6 * Copyright (C) 2006-2010 Nokia Corporation 7 * Copyright (C) 2007-2009 Texas Instruments, Inc. 8 * 9 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> 10 * Sakari Ailus <sakari.ailus@iki.fi> 11 * 12 * Contributors: 13 * Laurent Pinchart <laurent.pinchart@ideasonboard.com> 14 * Sakari Ailus <sakari.ailus@iki.fi> 15 * David Cohen <dacohen@gmail.com> 16 * Stanimir Varbanov <svarbanov@mm-sol.com> 17 * Vimarsh Zutshi <vimarsh.zutshi@gmail.com> 18 * Tuukka Toivonen <tuukkat76@gmail.com> 19 * Sergio Aguirre <saaguirre@ti.com> 20 * Antti Koskipaa <akoskipa@gmail.com> 21 * Ivan T. Ivanov <iivanov@mm-sol.com> 22 * RaniSuneela <r-m@ti.com> 23 * Atanas Filipov <afilipov@mm-sol.com> 24 * Gjorgji Rosikopulos <grosikopulos@mm-sol.com> 25 * Hiroshi DOYU <hiroshi.doyu@nokia.com> 26 * Nayden Kanchev <nkanchev@mm-sol.com> 27 * Phil Carmody <ext-phil.2.carmody@nokia.com> 28 * Artem Bityutskiy <artem.bityutskiy@nokia.com> 29 * Dominic Curran <dcurran@ti.com> 30 * Ilkka Myllyperkio <ilkka.myllyperkio@sofica.fi> 31 * Pallavi Kulkarni <p-kulkarni@ti.com> 32 * Vaibhav Hiremath <hvaibhav@ti.com> 33 * Mohit Jalori <mjalori@ti.com> 34 * Sameer Venkatraman <sameerv@ti.com> 35 * Senthilvadivu Guruswamy <svadivu@ti.com> 36 * Thara Gopinath <thara@ti.com> 37 * Toni Leinonen <toni.leinonen@nokia.com> 38 * Troy Laramy <t-laramy@ti.com> 39 * 40 * This program is free software; you can redistribute it and/or modify 41 * it under the terms of the GNU General Public License version 2 as 42 * published by the Free Software Foundation. 43 */ 44 45#include <asm/cacheflush.h> 46 47#include <linux/clk.h> 48#include <linux/clkdev.h> 49#include <linux/delay.h> 50#include <linux/device.h> 51#include <linux/dma-mapping.h> 52#include <linux/i2c.h> 53#include <linux/interrupt.h> 54#include <linux/mfd/syscon.h> 55#include <linux/module.h> 56#include <linux/omap-iommu.h> 57#include <linux/platform_device.h> 58#include <linux/regulator/consumer.h> 59#include <linux/slab.h> 60#include <linux/sched.h> 61#include <linux/vmalloc.h> 62 63#include <asm/dma-iommu.h> 64 65#include <media/v4l2-common.h> 66#include <media/v4l2-device.h> 67#include <media/v4l2-of.h> 68 69#include "isp.h" 70#include "ispreg.h" 71#include "ispccdc.h" 72#include "isppreview.h" 73#include "ispresizer.h" 74#include "ispcsi2.h" 75#include "ispccp2.h" 76#include "isph3a.h" 77#include "isphist.h" 78 79static unsigned int autoidle; 80module_param(autoidle, int, 0444); 81MODULE_PARM_DESC(autoidle, "Enable OMAP3ISP AUTOIDLE support"); 82 83static void isp_save_ctx(struct isp_device *isp); 84 85static void isp_restore_ctx(struct isp_device *isp); 86 87static const struct isp_res_mapping isp_res_maps[] = { 88 { 89 .isp_rev = ISP_REVISION_2_0, 90 .offset = { 91 /* first MMIO area */ 92 0x0000, /* base, len 0x0070 */ 93 0x0400, /* ccp2, len 0x01f0 */ 94 0x0600, /* ccdc, len 0x00a8 */ 95 0x0a00, /* hist, len 0x0048 */ 96 0x0c00, /* h3a, len 0x0060 */ 97 0x0e00, /* preview, len 0x00a0 */ 98 0x1000, /* resizer, len 0x00ac */ 99 0x1200, /* sbl, len 0x00fc */ 100 /* second MMIO area */ 101 0x0000, /* csi2a, len 0x0170 */ 102 0x0170, /* csiphy2, len 0x000c */ 103 }, 104 .syscon_offset = 0xdc, 105 .phy_type = ISP_PHY_TYPE_3430, 106 }, 107 { 108 .isp_rev = ISP_REVISION_15_0, 109 .offset = { 110 /* first MMIO area */ 111 0x0000, /* base, len 0x0070 */ 112 0x0400, /* ccp2, len 0x01f0 */ 113 0x0600, /* ccdc, len 0x00a8 */ 114 0x0a00, /* hist, len 0x0048 */ 115 0x0c00, /* h3a, len 0x0060 */ 116 0x0e00, /* preview, len 0x00a0 */ 117 0x1000, /* resizer, len 0x00ac */ 118 0x1200, /* sbl, len 0x00fc */ 119 /* second MMIO area */ 120 0x0000, /* csi2a, len 0x0170 (1st area) */ 121 0x0170, /* csiphy2, len 0x000c */ 122 0x01c0, /* csi2a, len 0x0040 (2nd area) */ 123 0x0400, /* csi2c, len 0x0170 (1st area) */ 124 0x0570, /* csiphy1, len 0x000c */ 125 0x05c0, /* csi2c, len 0x0040 (2nd area) */ 126 }, 127 .syscon_offset = 0x2f0, 128 .phy_type = ISP_PHY_TYPE_3630, 129 }, 130}; 131 132/* Structure for saving/restoring ISP module registers */ 133static struct isp_reg isp_reg_list[] = { 134 {OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG, 0}, 135 {OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, 0}, 136 {OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL, 0}, 137 {0, ISP_TOK_TERM, 0} 138}; 139 140/* 141 * omap3isp_flush - Post pending L3 bus writes by doing a register readback 142 * @isp: OMAP3 ISP device 143 * 144 * In order to force posting of pending writes, we need to write and 145 * readback the same register, in this case the revision register. 146 * 147 * See this link for reference: 148 * http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html 149 */ 150void omap3isp_flush(struct isp_device *isp) 151{ 152 isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION); 153 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION); 154} 155 156/* ----------------------------------------------------------------------------- 157 * XCLK 158 */ 159 160#define to_isp_xclk(_hw) container_of(_hw, struct isp_xclk, hw) 161 162static void isp_xclk_update(struct isp_xclk *xclk, u32 divider) 163{ 164 switch (xclk->id) { 165 case ISP_XCLK_A: 166 isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL, 167 ISPTCTRL_CTRL_DIVA_MASK, 168 divider << ISPTCTRL_CTRL_DIVA_SHIFT); 169 break; 170 case ISP_XCLK_B: 171 isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL, 172 ISPTCTRL_CTRL_DIVB_MASK, 173 divider << ISPTCTRL_CTRL_DIVB_SHIFT); 174 break; 175 } 176} 177 178static int isp_xclk_prepare(struct clk_hw *hw) 179{ 180 struct isp_xclk *xclk = to_isp_xclk(hw); 181 182 omap3isp_get(xclk->isp); 183 184 return 0; 185} 186 187static void isp_xclk_unprepare(struct clk_hw *hw) 188{ 189 struct isp_xclk *xclk = to_isp_xclk(hw); 190 191 omap3isp_put(xclk->isp); 192} 193 194static int isp_xclk_enable(struct clk_hw *hw) 195{ 196 struct isp_xclk *xclk = to_isp_xclk(hw); 197 unsigned long flags; 198 199 spin_lock_irqsave(&xclk->lock, flags); 200 isp_xclk_update(xclk, xclk->divider); 201 xclk->enabled = true; 202 spin_unlock_irqrestore(&xclk->lock, flags); 203 204 return 0; 205} 206 207static void isp_xclk_disable(struct clk_hw *hw) 208{ 209 struct isp_xclk *xclk = to_isp_xclk(hw); 210 unsigned long flags; 211 212 spin_lock_irqsave(&xclk->lock, flags); 213 isp_xclk_update(xclk, 0); 214 xclk->enabled = false; 215 spin_unlock_irqrestore(&xclk->lock, flags); 216} 217 218static unsigned long isp_xclk_recalc_rate(struct clk_hw *hw, 219 unsigned long parent_rate) 220{ 221 struct isp_xclk *xclk = to_isp_xclk(hw); 222 223 return parent_rate / xclk->divider; 224} 225 226static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate) 227{ 228 u32 divider; 229 230 if (*rate >= parent_rate) { 231 *rate = parent_rate; 232 return ISPTCTRL_CTRL_DIV_BYPASS; 233 } 234 235 if (*rate == 0) 236 *rate = 1; 237 238 divider = DIV_ROUND_CLOSEST(parent_rate, *rate); 239 if (divider >= ISPTCTRL_CTRL_DIV_BYPASS) 240 divider = ISPTCTRL_CTRL_DIV_BYPASS - 1; 241 242 *rate = parent_rate / divider; 243 return divider; 244} 245 246static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate, 247 unsigned long *parent_rate) 248{ 249 isp_xclk_calc_divider(&rate, *parent_rate); 250 return rate; 251} 252 253static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate, 254 unsigned long parent_rate) 255{ 256 struct isp_xclk *xclk = to_isp_xclk(hw); 257 unsigned long flags; 258 u32 divider; 259 260 divider = isp_xclk_calc_divider(&rate, parent_rate); 261 262 spin_lock_irqsave(&xclk->lock, flags); 263 264 xclk->divider = divider; 265 if (xclk->enabled) 266 isp_xclk_update(xclk, divider); 267 268 spin_unlock_irqrestore(&xclk->lock, flags); 269 270 dev_dbg(xclk->isp->dev, "%s: cam_xclk%c set to %lu Hz (div %u)\n", 271 __func__, xclk->id == ISP_XCLK_A ? 'a' : 'b', rate, divider); 272 return 0; 273} 274 275static const struct clk_ops isp_xclk_ops = { 276 .prepare = isp_xclk_prepare, 277 .unprepare = isp_xclk_unprepare, 278 .enable = isp_xclk_enable, 279 .disable = isp_xclk_disable, 280 .recalc_rate = isp_xclk_recalc_rate, 281 .round_rate = isp_xclk_round_rate, 282 .set_rate = isp_xclk_set_rate, 283}; 284 285static const char *isp_xclk_parent_name = "cam_mclk"; 286 287static const struct clk_init_data isp_xclk_init_data = { 288 .name = "cam_xclk", 289 .ops = &isp_xclk_ops, 290 .parent_names = &isp_xclk_parent_name, 291 .num_parents = 1, 292}; 293 294static struct clk *isp_xclk_src_get(struct of_phandle_args *clkspec, void *data) 295{ 296 unsigned int idx = clkspec->args[0]; 297 struct isp_device *isp = data; 298 299 if (idx >= ARRAY_SIZE(isp->xclks)) 300 return ERR_PTR(-ENOENT); 301 302 return isp->xclks[idx].clk; 303} 304 305static int isp_xclk_init(struct isp_device *isp) 306{ 307 struct device_node *np = isp->dev->of_node; 308 struct clk_init_data init; 309 unsigned int i; 310 311 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) 312 isp->xclks[i].clk = ERR_PTR(-EINVAL); 313 314 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) { 315 struct isp_xclk *xclk = &isp->xclks[i]; 316 317 xclk->isp = isp; 318 xclk->id = i == 0 ? ISP_XCLK_A : ISP_XCLK_B; 319 xclk->divider = 1; 320 spin_lock_init(&xclk->lock); 321 322 init.name = i == 0 ? "cam_xclka" : "cam_xclkb"; 323 init.ops = &isp_xclk_ops; 324 init.parent_names = &isp_xclk_parent_name; 325 init.num_parents = 1; 326 327 xclk->hw.init = &init; 328 /* 329 * The first argument is NULL in order to avoid circular 330 * reference, as this driver takes reference on the 331 * sensor subdevice modules and the sensors would take 332 * reference on this module through clk_get(). 333 */ 334 xclk->clk = clk_register(NULL, &xclk->hw); 335 if (IS_ERR(xclk->clk)) 336 return PTR_ERR(xclk->clk); 337 } 338 339 if (np) 340 of_clk_add_provider(np, isp_xclk_src_get, isp); 341 342 return 0; 343} 344 345static void isp_xclk_cleanup(struct isp_device *isp) 346{ 347 struct device_node *np = isp->dev->of_node; 348 unsigned int i; 349 350 if (np) 351 of_clk_del_provider(np); 352 353 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) { 354 struct isp_xclk *xclk = &isp->xclks[i]; 355 356 if (!IS_ERR(xclk->clk)) 357 clk_unregister(xclk->clk); 358 } 359} 360 361/* ----------------------------------------------------------------------------- 362 * Interrupts 363 */ 364 365/* 366 * isp_enable_interrupts - Enable ISP interrupts. 367 * @isp: OMAP3 ISP device 368 */ 369static void isp_enable_interrupts(struct isp_device *isp) 370{ 371 static const u32 irq = IRQ0ENABLE_CSIA_IRQ 372 | IRQ0ENABLE_CSIB_IRQ 373 | IRQ0ENABLE_CCDC_LSC_PREF_ERR_IRQ 374 | IRQ0ENABLE_CCDC_LSC_DONE_IRQ 375 | IRQ0ENABLE_CCDC_VD0_IRQ 376 | IRQ0ENABLE_CCDC_VD1_IRQ 377 | IRQ0ENABLE_HS_VS_IRQ 378 | IRQ0ENABLE_HIST_DONE_IRQ 379 | IRQ0ENABLE_H3A_AWB_DONE_IRQ 380 | IRQ0ENABLE_H3A_AF_DONE_IRQ 381 | IRQ0ENABLE_PRV_DONE_IRQ 382 | IRQ0ENABLE_RSZ_DONE_IRQ; 383 384 isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS); 385 isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE); 386} 387 388/* 389 * isp_disable_interrupts - Disable ISP interrupts. 390 * @isp: OMAP3 ISP device 391 */ 392static void isp_disable_interrupts(struct isp_device *isp) 393{ 394 isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE); 395} 396 397/* 398 * isp_core_init - ISP core settings 399 * @isp: OMAP3 ISP device 400 * @idle: Consider idle state. 401 * 402 * Set the power settings for the ISP and SBL bus and configure the HS/VS 403 * interrupt source. 404 * 405 * We need to configure the HS/VS interrupt source before interrupts get 406 * enabled, as the sensor might be free-running and the ISP default setting 407 * (HS edge) would put an unnecessary burden on the CPU. 408 */ 409static void isp_core_init(struct isp_device *isp, int idle) 410{ 411 isp_reg_writel(isp, 412 ((idle ? ISP_SYSCONFIG_MIDLEMODE_SMARTSTANDBY : 413 ISP_SYSCONFIG_MIDLEMODE_FORCESTANDBY) << 414 ISP_SYSCONFIG_MIDLEMODE_SHIFT) | 415 ((isp->revision == ISP_REVISION_15_0) ? 416 ISP_SYSCONFIG_AUTOIDLE : 0), 417 OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG); 418 419 isp_reg_writel(isp, 420 (isp->autoidle ? ISPCTRL_SBL_AUTOIDLE : 0) | 421 ISPCTRL_SYNC_DETECT_VSRISE, 422 OMAP3_ISP_IOMEM_MAIN, ISP_CTRL); 423} 424 425/* 426 * Configure the bridge and lane shifter. Valid inputs are 427 * 428 * CCDC_INPUT_PARALLEL: Parallel interface 429 * CCDC_INPUT_CSI2A: CSI2a receiver 430 * CCDC_INPUT_CCP2B: CCP2b receiver 431 * CCDC_INPUT_CSI2C: CSI2c receiver 432 * 433 * The bridge and lane shifter are configured according to the selected input 434 * and the ISP platform data. 435 */ 436void omap3isp_configure_bridge(struct isp_device *isp, 437 enum ccdc_input_entity input, 438 const struct isp_parallel_cfg *parcfg, 439 unsigned int shift, unsigned int bridge) 440{ 441 u32 ispctrl_val; 442 443 ispctrl_val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL); 444 ispctrl_val &= ~ISPCTRL_SHIFT_MASK; 445 ispctrl_val &= ~ISPCTRL_PAR_CLK_POL_INV; 446 ispctrl_val &= ~ISPCTRL_PAR_SER_CLK_SEL_MASK; 447 ispctrl_val &= ~ISPCTRL_PAR_BRIDGE_MASK; 448 ispctrl_val |= bridge; 449 450 switch (input) { 451 case CCDC_INPUT_PARALLEL: 452 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_PARALLEL; 453 ispctrl_val |= parcfg->clk_pol << ISPCTRL_PAR_CLK_POL_SHIFT; 454 shift += parcfg->data_lane_shift * 2; 455 break; 456 457 case CCDC_INPUT_CSI2A: 458 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIA; 459 break; 460 461 case CCDC_INPUT_CCP2B: 462 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIB; 463 break; 464 465 case CCDC_INPUT_CSI2C: 466 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIC; 467 break; 468 469 default: 470 return; 471 } 472 473 ispctrl_val |= ((shift/2) << ISPCTRL_SHIFT_SHIFT) & ISPCTRL_SHIFT_MASK; 474 475 isp_reg_writel(isp, ispctrl_val, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL); 476} 477 478void omap3isp_hist_dma_done(struct isp_device *isp) 479{ 480 if (omap3isp_ccdc_busy(&isp->isp_ccdc) || 481 omap3isp_stat_pcr_busy(&isp->isp_hist)) { 482 /* Histogram cannot be enabled in this frame anymore */ 483 atomic_set(&isp->isp_hist.buf_err, 1); 484 dev_dbg(isp->dev, "hist: Out of synchronization with " 485 "CCDC. Ignoring next buffer.\n"); 486 } 487} 488 489static inline void isp_isr_dbg(struct isp_device *isp, u32 irqstatus) 490{ 491 static const char *name[] = { 492 "CSIA_IRQ", 493 "res1", 494 "res2", 495 "CSIB_LCM_IRQ", 496 "CSIB_IRQ", 497 "res5", 498 "res6", 499 "res7", 500 "CCDC_VD0_IRQ", 501 "CCDC_VD1_IRQ", 502 "CCDC_VD2_IRQ", 503 "CCDC_ERR_IRQ", 504 "H3A_AF_DONE_IRQ", 505 "H3A_AWB_DONE_IRQ", 506 "res14", 507 "res15", 508 "HIST_DONE_IRQ", 509 "CCDC_LSC_DONE", 510 "CCDC_LSC_PREFETCH_COMPLETED", 511 "CCDC_LSC_PREFETCH_ERROR", 512 "PRV_DONE_IRQ", 513 "CBUFF_IRQ", 514 "res22", 515 "res23", 516 "RSZ_DONE_IRQ", 517 "OVF_IRQ", 518 "res26", 519 "res27", 520 "MMU_ERR_IRQ", 521 "OCP_ERR_IRQ", 522 "SEC_ERR_IRQ", 523 "HS_VS_IRQ", 524 }; 525 int i; 526 527 dev_dbg(isp->dev, "ISP IRQ: "); 528 529 for (i = 0; i < ARRAY_SIZE(name); i++) { 530 if ((1 << i) & irqstatus) 531 printk(KERN_CONT "%s ", name[i]); 532 } 533 printk(KERN_CONT "\n"); 534} 535 536static void isp_isr_sbl(struct isp_device *isp) 537{ 538 struct device *dev = isp->dev; 539 struct isp_pipeline *pipe; 540 u32 sbl_pcr; 541 542 /* 543 * Handle shared buffer logic overflows for video buffers. 544 * ISPSBL_PCR_CCDCPRV_2_RSZ_OVF can be safely ignored. 545 */ 546 sbl_pcr = isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR); 547 isp_reg_writel(isp, sbl_pcr, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR); 548 sbl_pcr &= ~ISPSBL_PCR_CCDCPRV_2_RSZ_OVF; 549 550 if (sbl_pcr) 551 dev_dbg(dev, "SBL overflow (PCR = 0x%08x)\n", sbl_pcr); 552 553 if (sbl_pcr & ISPSBL_PCR_CSIB_WBL_OVF) { 554 pipe = to_isp_pipeline(&isp->isp_ccp2.subdev.entity); 555 if (pipe != NULL) 556 pipe->error = true; 557 } 558 559 if (sbl_pcr & ISPSBL_PCR_CSIA_WBL_OVF) { 560 pipe = to_isp_pipeline(&isp->isp_csi2a.subdev.entity); 561 if (pipe != NULL) 562 pipe->error = true; 563 } 564 565 if (sbl_pcr & ISPSBL_PCR_CCDC_WBL_OVF) { 566 pipe = to_isp_pipeline(&isp->isp_ccdc.subdev.entity); 567 if (pipe != NULL) 568 pipe->error = true; 569 } 570 571 if (sbl_pcr & ISPSBL_PCR_PRV_WBL_OVF) { 572 pipe = to_isp_pipeline(&isp->isp_prev.subdev.entity); 573 if (pipe != NULL) 574 pipe->error = true; 575 } 576 577 if (sbl_pcr & (ISPSBL_PCR_RSZ1_WBL_OVF 578 | ISPSBL_PCR_RSZ2_WBL_OVF 579 | ISPSBL_PCR_RSZ3_WBL_OVF 580 | ISPSBL_PCR_RSZ4_WBL_OVF)) { 581 pipe = to_isp_pipeline(&isp->isp_res.subdev.entity); 582 if (pipe != NULL) 583 pipe->error = true; 584 } 585 586 if (sbl_pcr & ISPSBL_PCR_H3A_AF_WBL_OVF) 587 omap3isp_stat_sbl_overflow(&isp->isp_af); 588 589 if (sbl_pcr & ISPSBL_PCR_H3A_AEAWB_WBL_OVF) 590 omap3isp_stat_sbl_overflow(&isp->isp_aewb); 591} 592 593/* 594 * isp_isr - Interrupt Service Routine for Camera ISP module. 595 * @irq: Not used currently. 596 * @_isp: Pointer to the OMAP3 ISP device 597 * 598 * Handles the corresponding callback if plugged in. 599 */ 600static irqreturn_t isp_isr(int irq, void *_isp) 601{ 602 static const u32 ccdc_events = IRQ0STATUS_CCDC_LSC_PREF_ERR_IRQ | 603 IRQ0STATUS_CCDC_LSC_DONE_IRQ | 604 IRQ0STATUS_CCDC_VD0_IRQ | 605 IRQ0STATUS_CCDC_VD1_IRQ | 606 IRQ0STATUS_HS_VS_IRQ; 607 struct isp_device *isp = _isp; 608 u32 irqstatus; 609 610 irqstatus = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS); 611 isp_reg_writel(isp, irqstatus, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS); 612 613 isp_isr_sbl(isp); 614 615 if (irqstatus & IRQ0STATUS_CSIA_IRQ) 616 omap3isp_csi2_isr(&isp->isp_csi2a); 617 618 if (irqstatus & IRQ0STATUS_CSIB_IRQ) 619 omap3isp_ccp2_isr(&isp->isp_ccp2); 620 621 if (irqstatus & IRQ0STATUS_CCDC_VD0_IRQ) { 622 if (isp->isp_ccdc.output & CCDC_OUTPUT_PREVIEW) 623 omap3isp_preview_isr_frame_sync(&isp->isp_prev); 624 if (isp->isp_ccdc.output & CCDC_OUTPUT_RESIZER) 625 omap3isp_resizer_isr_frame_sync(&isp->isp_res); 626 omap3isp_stat_isr_frame_sync(&isp->isp_aewb); 627 omap3isp_stat_isr_frame_sync(&isp->isp_af); 628 omap3isp_stat_isr_frame_sync(&isp->isp_hist); 629 } 630 631 if (irqstatus & ccdc_events) 632 omap3isp_ccdc_isr(&isp->isp_ccdc, irqstatus & ccdc_events); 633 634 if (irqstatus & IRQ0STATUS_PRV_DONE_IRQ) { 635 if (isp->isp_prev.output & PREVIEW_OUTPUT_RESIZER) 636 omap3isp_resizer_isr_frame_sync(&isp->isp_res); 637 omap3isp_preview_isr(&isp->isp_prev); 638 } 639 640 if (irqstatus & IRQ0STATUS_RSZ_DONE_IRQ) 641 omap3isp_resizer_isr(&isp->isp_res); 642 643 if (irqstatus & IRQ0STATUS_H3A_AWB_DONE_IRQ) 644 omap3isp_stat_isr(&isp->isp_aewb); 645 646 if (irqstatus & IRQ0STATUS_H3A_AF_DONE_IRQ) 647 omap3isp_stat_isr(&isp->isp_af); 648 649 if (irqstatus & IRQ0STATUS_HIST_DONE_IRQ) 650 omap3isp_stat_isr(&isp->isp_hist); 651 652 omap3isp_flush(isp); 653 654#if defined(DEBUG) && defined(ISP_ISR_DEBUG) 655 isp_isr_dbg(isp, irqstatus); 656#endif 657 658 return IRQ_HANDLED; 659} 660 661/* ----------------------------------------------------------------------------- 662 * Pipeline power management 663 * 664 * Entities must be powered up when part of a pipeline that contains at least 665 * one open video device node. 666 * 667 * To achieve this use the entity use_count field to track the number of users. 668 * For entities corresponding to video device nodes the use_count field stores 669 * the users count of the node. For entities corresponding to subdevs the 670 * use_count field stores the total number of users of all video device nodes 671 * in the pipeline. 672 * 673 * The omap3isp_pipeline_pm_use() function must be called in the open() and 674 * close() handlers of video device nodes. It increments or decrements the use 675 * count of all subdev entities in the pipeline. 676 * 677 * To react to link management on powered pipelines, the link setup notification 678 * callback updates the use count of all entities in the source and sink sides 679 * of the link. 680 */ 681 682/* 683 * isp_pipeline_pm_use_count - Count the number of users of a pipeline 684 * @entity: The entity 685 * 686 * Return the total number of users of all video device nodes in the pipeline. 687 */ 688static int isp_pipeline_pm_use_count(struct media_entity *entity) 689{ 690 struct media_entity_graph graph; 691 int use = 0; 692 693 media_entity_graph_walk_start(&graph, entity); 694 695 while ((entity = media_entity_graph_walk_next(&graph))) { 696 if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE) 697 use += entity->use_count; 698 } 699 700 return use; 701} 702 703/* 704 * isp_pipeline_pm_power_one - Apply power change to an entity 705 * @entity: The entity 706 * @change: Use count change 707 * 708 * Change the entity use count by @change. If the entity is a subdev update its 709 * power state by calling the core::s_power operation when the use count goes 710 * from 0 to != 0 or from != 0 to 0. 711 * 712 * Return 0 on success or a negative error code on failure. 713 */ 714static int isp_pipeline_pm_power_one(struct media_entity *entity, int change) 715{ 716 struct v4l2_subdev *subdev; 717 int ret; 718 719 subdev = media_entity_type(entity) == MEDIA_ENT_T_V4L2_SUBDEV 720 ? media_entity_to_v4l2_subdev(entity) : NULL; 721 722 if (entity->use_count == 0 && change > 0 && subdev != NULL) { 723 ret = v4l2_subdev_call(subdev, core, s_power, 1); 724 if (ret < 0 && ret != -ENOIOCTLCMD) 725 return ret; 726 } 727 728 entity->use_count += change; 729 WARN_ON(entity->use_count < 0); 730 731 if (entity->use_count == 0 && change < 0 && subdev != NULL) 732 v4l2_subdev_call(subdev, core, s_power, 0); 733 734 return 0; 735} 736 737/* 738 * isp_pipeline_pm_power - Apply power change to all entities in a pipeline 739 * @entity: The entity 740 * @change: Use count change 741 * 742 * Walk the pipeline to update the use count and the power state of all non-node 743 * entities. 744 * 745 * Return 0 on success or a negative error code on failure. 746 */ 747static int isp_pipeline_pm_power(struct media_entity *entity, int change) 748{ 749 struct media_entity_graph graph; 750 struct media_entity *first = entity; 751 int ret = 0; 752 753 if (!change) 754 return 0; 755 756 media_entity_graph_walk_start(&graph, entity); 757 758 while (!ret && (entity = media_entity_graph_walk_next(&graph))) 759 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) 760 ret = isp_pipeline_pm_power_one(entity, change); 761 762 if (!ret) 763 return 0; 764 765 media_entity_graph_walk_start(&graph, first); 766 767 while ((first = media_entity_graph_walk_next(&graph)) 768 && first != entity) 769 if (media_entity_type(first) != MEDIA_ENT_T_DEVNODE) 770 isp_pipeline_pm_power_one(first, -change); 771 772 return ret; 773} 774 775/* 776 * omap3isp_pipeline_pm_use - Update the use count of an entity 777 * @entity: The entity 778 * @use: Use (1) or stop using (0) the entity 779 * 780 * Update the use count of all entities in the pipeline and power entities on or 781 * off accordingly. 782 * 783 * Return 0 on success or a negative error code on failure. Powering entities 784 * off is assumed to never fail. No failure can occur when the use parameter is 785 * set to 0. 786 */ 787int omap3isp_pipeline_pm_use(struct media_entity *entity, int use) 788{ 789 int change = use ? 1 : -1; 790 int ret; 791 792 mutex_lock(&entity->parent->graph_mutex); 793 794 /* Apply use count to node. */ 795 entity->use_count += change; 796 WARN_ON(entity->use_count < 0); 797 798 /* Apply power change to connected non-nodes. */ 799 ret = isp_pipeline_pm_power(entity, change); 800 if (ret < 0) 801 entity->use_count -= change; 802 803 mutex_unlock(&entity->parent->graph_mutex); 804 805 return ret; 806} 807 808/* 809 * isp_pipeline_link_notify - Link management notification callback 810 * @link: The link 811 * @flags: New link flags that will be applied 812 * @notification: The link's state change notification type (MEDIA_DEV_NOTIFY_*) 813 * 814 * React to link management on powered pipelines by updating the use count of 815 * all entities in the source and sink sides of the link. Entities are powered 816 * on or off accordingly. 817 * 818 * Return 0 on success or a negative error code on failure. Powering entities 819 * off is assumed to never fail. This function will not fail for disconnection 820 * events. 821 */ 822static int isp_pipeline_link_notify(struct media_link *link, u32 flags, 823 unsigned int notification) 824{ 825 struct media_entity *source = link->source->entity; 826 struct media_entity *sink = link->sink->entity; 827 int source_use = isp_pipeline_pm_use_count(source); 828 int sink_use = isp_pipeline_pm_use_count(sink); 829 int ret; 830 831 if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH && 832 !(flags & MEDIA_LNK_FL_ENABLED)) { 833 /* Powering off entities is assumed to never fail. */ 834 isp_pipeline_pm_power(source, -sink_use); 835 isp_pipeline_pm_power(sink, -source_use); 836 return 0; 837 } 838 839 if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH && 840 (flags & MEDIA_LNK_FL_ENABLED)) { 841 842 ret = isp_pipeline_pm_power(source, sink_use); 843 if (ret < 0) 844 return ret; 845 846 ret = isp_pipeline_pm_power(sink, source_use); 847 if (ret < 0) 848 isp_pipeline_pm_power(source, -sink_use); 849 850 return ret; 851 } 852 853 return 0; 854} 855 856/* ----------------------------------------------------------------------------- 857 * Pipeline stream management 858 */ 859 860/* 861 * isp_pipeline_enable - Enable streaming on a pipeline 862 * @pipe: ISP pipeline 863 * @mode: Stream mode (single shot or continuous) 864 * 865 * Walk the entities chain starting at the pipeline output video node and start 866 * all modules in the chain in the given mode. 867 * 868 * Return 0 if successful, or the return value of the failed video::s_stream 869 * operation otherwise. 870 */ 871static int isp_pipeline_enable(struct isp_pipeline *pipe, 872 enum isp_pipeline_stream_state mode) 873{ 874 struct isp_device *isp = pipe->output->isp; 875 struct media_entity *entity; 876 struct media_pad *pad; 877 struct v4l2_subdev *subdev; 878 unsigned long flags; 879 int ret; 880 881 /* Refuse to start streaming if an entity included in the pipeline has 882 * crashed. This check must be performed before the loop below to avoid 883 * starting entities if the pipeline won't start anyway (those entities 884 * would then likely fail to stop, making the problem worse). 885 */ 886 if (pipe->entities & isp->crashed) 887 return -EIO; 888 889 spin_lock_irqsave(&pipe->lock, flags); 890 pipe->state &= ~(ISP_PIPELINE_IDLE_INPUT | ISP_PIPELINE_IDLE_OUTPUT); 891 spin_unlock_irqrestore(&pipe->lock, flags); 892 893 pipe->do_propagation = false; 894 895 entity = &pipe->output->video.entity; 896 while (1) { 897 pad = &entity->pads[0]; 898 if (!(pad->flags & MEDIA_PAD_FL_SINK)) 899 break; 900 901 pad = media_entity_remote_pad(pad); 902 if (pad == NULL || 903 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) 904 break; 905 906 entity = pad->entity; 907 subdev = media_entity_to_v4l2_subdev(entity); 908 909 ret = v4l2_subdev_call(subdev, video, s_stream, mode); 910 if (ret < 0 && ret != -ENOIOCTLCMD) 911 return ret; 912 913 if (subdev == &isp->isp_ccdc.subdev) { 914 v4l2_subdev_call(&isp->isp_aewb.subdev, video, 915 s_stream, mode); 916 v4l2_subdev_call(&isp->isp_af.subdev, video, 917 s_stream, mode); 918 v4l2_subdev_call(&isp->isp_hist.subdev, video, 919 s_stream, mode); 920 pipe->do_propagation = true; 921 } 922 } 923 924 return 0; 925} 926 927static int isp_pipeline_wait_resizer(struct isp_device *isp) 928{ 929 return omap3isp_resizer_busy(&isp->isp_res); 930} 931 932static int isp_pipeline_wait_preview(struct isp_device *isp) 933{ 934 return omap3isp_preview_busy(&isp->isp_prev); 935} 936 937static int isp_pipeline_wait_ccdc(struct isp_device *isp) 938{ 939 return omap3isp_stat_busy(&isp->isp_af) 940 || omap3isp_stat_busy(&isp->isp_aewb) 941 || omap3isp_stat_busy(&isp->isp_hist) 942 || omap3isp_ccdc_busy(&isp->isp_ccdc); 943} 944 945#define ISP_STOP_TIMEOUT msecs_to_jiffies(1000) 946 947static int isp_pipeline_wait(struct isp_device *isp, 948 int(*busy)(struct isp_device *isp)) 949{ 950 unsigned long timeout = jiffies + ISP_STOP_TIMEOUT; 951 952 while (!time_after(jiffies, timeout)) { 953 if (!busy(isp)) 954 return 0; 955 } 956 957 return 1; 958} 959 960/* 961 * isp_pipeline_disable - Disable streaming on a pipeline 962 * @pipe: ISP pipeline 963 * 964 * Walk the entities chain starting at the pipeline output video node and stop 965 * all modules in the chain. Wait synchronously for the modules to be stopped if 966 * necessary. 967 * 968 * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module 969 * can't be stopped (in which case a software reset of the ISP is probably 970 * necessary). 971 */ 972static int isp_pipeline_disable(struct isp_pipeline *pipe) 973{ 974 struct isp_device *isp = pipe->output->isp; 975 struct media_entity *entity; 976 struct media_pad *pad; 977 struct v4l2_subdev *subdev; 978 int failure = 0; 979 int ret; 980 981 /* 982 * We need to stop all the modules after CCDC first or they'll 983 * never stop since they may not get a full frame from CCDC. 984 */ 985 entity = &pipe->output->video.entity; 986 while (1) { 987 pad = &entity->pads[0]; 988 if (!(pad->flags & MEDIA_PAD_FL_SINK)) 989 break; 990 991 pad = media_entity_remote_pad(pad); 992 if (pad == NULL || 993 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) 994 break; 995 996 entity = pad->entity; 997 subdev = media_entity_to_v4l2_subdev(entity); 998 999 if (subdev == &isp->isp_ccdc.subdev) { 1000 v4l2_subdev_call(&isp->isp_aewb.subdev, 1001 video, s_stream, 0); 1002 v4l2_subdev_call(&isp->isp_af.subdev, 1003 video, s_stream, 0); 1004 v4l2_subdev_call(&isp->isp_hist.subdev, 1005 video, s_stream, 0); 1006 } 1007 1008 ret = v4l2_subdev_call(subdev, video, s_stream, 0); 1009 1010 if (subdev == &isp->isp_res.subdev) 1011 ret |= isp_pipeline_wait(isp, isp_pipeline_wait_resizer); 1012 else if (subdev == &isp->isp_prev.subdev) 1013 ret |= isp_pipeline_wait(isp, isp_pipeline_wait_preview); 1014 else if (subdev == &isp->isp_ccdc.subdev) 1015 ret |= isp_pipeline_wait(isp, isp_pipeline_wait_ccdc); 1016 1017 /* Handle stop failures. An entity that fails to stop can 1018 * usually just be restarted. Flag the stop failure nonetheless 1019 * to trigger an ISP reset the next time the device is released, 1020 * just in case. 1021 * 1022 * The preview engine is a special case. A failure to stop can 1023 * mean a hardware crash. When that happens the preview engine 1024 * won't respond to read/write operations on the L4 bus anymore, 1025 * resulting in a bus fault and a kernel oops next time it gets 1026 * accessed. Mark it as crashed to prevent pipelines including 1027 * it from being started. 1028 */ 1029 if (ret) { 1030 dev_info(isp->dev, "Unable to stop %s\n", subdev->name); 1031 isp->stop_failure = true; 1032 if (subdev == &isp->isp_prev.subdev) 1033 isp->crashed |= 1U << subdev->entity.id; 1034 failure = -ETIMEDOUT; 1035 } 1036 } 1037 1038 return failure; 1039} 1040 1041/* 1042 * omap3isp_pipeline_set_stream - Enable/disable streaming on a pipeline 1043 * @pipe: ISP pipeline 1044 * @state: Stream state (stopped, single shot or continuous) 1045 * 1046 * Set the pipeline to the given stream state. Pipelines can be started in 1047 * single-shot or continuous mode. 1048 * 1049 * Return 0 if successful, or the return value of the failed video::s_stream 1050 * operation otherwise. The pipeline state is not updated when the operation 1051 * fails, except when stopping the pipeline. 1052 */ 1053int omap3isp_pipeline_set_stream(struct isp_pipeline *pipe, 1054 enum isp_pipeline_stream_state state) 1055{ 1056 int ret; 1057 1058 if (state == ISP_PIPELINE_STREAM_STOPPED) 1059 ret = isp_pipeline_disable(pipe); 1060 else 1061 ret = isp_pipeline_enable(pipe, state); 1062 1063 if (ret == 0 || state == ISP_PIPELINE_STREAM_STOPPED) 1064 pipe->stream_state = state; 1065 1066 return ret; 1067} 1068 1069/* 1070 * omap3isp_pipeline_cancel_stream - Cancel stream on a pipeline 1071 * @pipe: ISP pipeline 1072 * 1073 * Cancelling a stream mark all buffers on all video nodes in the pipeline as 1074 * erroneous and makes sure no new buffer can be queued. This function is called 1075 * when a fatal error that prevents any further operation on the pipeline 1076 * occurs. 1077 */ 1078void omap3isp_pipeline_cancel_stream(struct isp_pipeline *pipe) 1079{ 1080 if (pipe->input) 1081 omap3isp_video_cancel_stream(pipe->input); 1082 if (pipe->output) 1083 omap3isp_video_cancel_stream(pipe->output); 1084} 1085 1086/* 1087 * isp_pipeline_resume - Resume streaming on a pipeline 1088 * @pipe: ISP pipeline 1089 * 1090 * Resume video output and input and re-enable pipeline. 1091 */ 1092static void isp_pipeline_resume(struct isp_pipeline *pipe) 1093{ 1094 int singleshot = pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT; 1095 1096 omap3isp_video_resume(pipe->output, !singleshot); 1097 if (singleshot) 1098 omap3isp_video_resume(pipe->input, 0); 1099 isp_pipeline_enable(pipe, pipe->stream_state); 1100} 1101 1102/* 1103 * isp_pipeline_suspend - Suspend streaming on a pipeline 1104 * @pipe: ISP pipeline 1105 * 1106 * Suspend pipeline. 1107 */ 1108static void isp_pipeline_suspend(struct isp_pipeline *pipe) 1109{ 1110 isp_pipeline_disable(pipe); 1111} 1112 1113/* 1114 * isp_pipeline_is_last - Verify if entity has an enabled link to the output 1115 * video node 1116 * @me: ISP module's media entity 1117 * 1118 * Returns 1 if the entity has an enabled link to the output video node or 0 1119 * otherwise. It's true only while pipeline can have no more than one output 1120 * node. 1121 */ 1122static int isp_pipeline_is_last(struct media_entity *me) 1123{ 1124 struct isp_pipeline *pipe; 1125 struct media_pad *pad; 1126 1127 if (!me->pipe) 1128 return 0; 1129 pipe = to_isp_pipeline(me); 1130 if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED) 1131 return 0; 1132 pad = media_entity_remote_pad(&pipe->output->pad); 1133 return pad->entity == me; 1134} 1135 1136/* 1137 * isp_suspend_module_pipeline - Suspend pipeline to which belongs the module 1138 * @me: ISP module's media entity 1139 * 1140 * Suspend the whole pipeline if module's entity has an enabled link to the 1141 * output video node. It works only while pipeline can have no more than one 1142 * output node. 1143 */ 1144static void isp_suspend_module_pipeline(struct media_entity *me) 1145{ 1146 if (isp_pipeline_is_last(me)) 1147 isp_pipeline_suspend(to_isp_pipeline(me)); 1148} 1149 1150/* 1151 * isp_resume_module_pipeline - Resume pipeline to which belongs the module 1152 * @me: ISP module's media entity 1153 * 1154 * Resume the whole pipeline if module's entity has an enabled link to the 1155 * output video node. It works only while pipeline can have no more than one 1156 * output node. 1157 */ 1158static void isp_resume_module_pipeline(struct media_entity *me) 1159{ 1160 if (isp_pipeline_is_last(me)) 1161 isp_pipeline_resume(to_isp_pipeline(me)); 1162} 1163 1164/* 1165 * isp_suspend_modules - Suspend ISP submodules. 1166 * @isp: OMAP3 ISP device 1167 * 1168 * Returns 0 if suspend left in idle state all the submodules properly, 1169 * or returns 1 if a general Reset is required to suspend the submodules. 1170 */ 1171static int isp_suspend_modules(struct isp_device *isp) 1172{ 1173 unsigned long timeout; 1174 1175 omap3isp_stat_suspend(&isp->isp_aewb); 1176 omap3isp_stat_suspend(&isp->isp_af); 1177 omap3isp_stat_suspend(&isp->isp_hist); 1178 isp_suspend_module_pipeline(&isp->isp_res.subdev.entity); 1179 isp_suspend_module_pipeline(&isp->isp_prev.subdev.entity); 1180 isp_suspend_module_pipeline(&isp->isp_ccdc.subdev.entity); 1181 isp_suspend_module_pipeline(&isp->isp_csi2a.subdev.entity); 1182 isp_suspend_module_pipeline(&isp->isp_ccp2.subdev.entity); 1183 1184 timeout = jiffies + ISP_STOP_TIMEOUT; 1185 while (omap3isp_stat_busy(&isp->isp_af) 1186 || omap3isp_stat_busy(&isp->isp_aewb) 1187 || omap3isp_stat_busy(&isp->isp_hist) 1188 || omap3isp_preview_busy(&isp->isp_prev) 1189 || omap3isp_resizer_busy(&isp->isp_res) 1190 || omap3isp_ccdc_busy(&isp->isp_ccdc)) { 1191 if (time_after(jiffies, timeout)) { 1192 dev_info(isp->dev, "can't stop modules.\n"); 1193 return 1; 1194 } 1195 msleep(1); 1196 } 1197 1198 return 0; 1199} 1200 1201/* 1202 * isp_resume_modules - Resume ISP submodules. 1203 * @isp: OMAP3 ISP device 1204 */ 1205static void isp_resume_modules(struct isp_device *isp) 1206{ 1207 omap3isp_stat_resume(&isp->isp_aewb); 1208 omap3isp_stat_resume(&isp->isp_af); 1209 omap3isp_stat_resume(&isp->isp_hist); 1210 isp_resume_module_pipeline(&isp->isp_res.subdev.entity); 1211 isp_resume_module_pipeline(&isp->isp_prev.subdev.entity); 1212 isp_resume_module_pipeline(&isp->isp_ccdc.subdev.entity); 1213 isp_resume_module_pipeline(&isp->isp_csi2a.subdev.entity); 1214 isp_resume_module_pipeline(&isp->isp_ccp2.subdev.entity); 1215} 1216 1217/* 1218 * isp_reset - Reset ISP with a timeout wait for idle. 1219 * @isp: OMAP3 ISP device 1220 */ 1221static int isp_reset(struct isp_device *isp) 1222{ 1223 unsigned long timeout = 0; 1224 1225 isp_reg_writel(isp, 1226 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG) 1227 | ISP_SYSCONFIG_SOFTRESET, 1228 OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG); 1229 while (!(isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, 1230 ISP_SYSSTATUS) & 0x1)) { 1231 if (timeout++ > 10000) { 1232 dev_alert(isp->dev, "cannot reset ISP\n"); 1233 return -ETIMEDOUT; 1234 } 1235 udelay(1); 1236 } 1237 1238 isp->stop_failure = false; 1239 isp->crashed = 0; 1240 return 0; 1241} 1242 1243/* 1244 * isp_save_context - Saves the values of the ISP module registers. 1245 * @isp: OMAP3 ISP device 1246 * @reg_list: Structure containing pairs of register address and value to 1247 * modify on OMAP. 1248 */ 1249static void 1250isp_save_context(struct isp_device *isp, struct isp_reg *reg_list) 1251{ 1252 struct isp_reg *next = reg_list; 1253 1254 for (; next->reg != ISP_TOK_TERM; next++) 1255 next->val = isp_reg_readl(isp, next->mmio_range, next->reg); 1256} 1257 1258/* 1259 * isp_restore_context - Restores the values of the ISP module registers. 1260 * @isp: OMAP3 ISP device 1261 * @reg_list: Structure containing pairs of register address and value to 1262 * modify on OMAP. 1263 */ 1264static void 1265isp_restore_context(struct isp_device *isp, struct isp_reg *reg_list) 1266{ 1267 struct isp_reg *next = reg_list; 1268 1269 for (; next->reg != ISP_TOK_TERM; next++) 1270 isp_reg_writel(isp, next->val, next->mmio_range, next->reg); 1271} 1272 1273/* 1274 * isp_save_ctx - Saves ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context. 1275 * @isp: OMAP3 ISP device 1276 * 1277 * Routine for saving the context of each module in the ISP. 1278 * CCDC, HIST, H3A, PREV, RESZ and MMU. 1279 */ 1280static void isp_save_ctx(struct isp_device *isp) 1281{ 1282 isp_save_context(isp, isp_reg_list); 1283 omap_iommu_save_ctx(isp->dev); 1284} 1285 1286/* 1287 * isp_restore_ctx - Restores ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context. 1288 * @isp: OMAP3 ISP device 1289 * 1290 * Routine for restoring the context of each module in the ISP. 1291 * CCDC, HIST, H3A, PREV, RESZ and MMU. 1292 */ 1293static void isp_restore_ctx(struct isp_device *isp) 1294{ 1295 isp_restore_context(isp, isp_reg_list); 1296 omap_iommu_restore_ctx(isp->dev); 1297 omap3isp_ccdc_restore_context(isp); 1298 omap3isp_preview_restore_context(isp); 1299} 1300 1301/* ----------------------------------------------------------------------------- 1302 * SBL resources management 1303 */ 1304#define OMAP3_ISP_SBL_READ (OMAP3_ISP_SBL_CSI1_READ | \ 1305 OMAP3_ISP_SBL_CCDC_LSC_READ | \ 1306 OMAP3_ISP_SBL_PREVIEW_READ | \ 1307 OMAP3_ISP_SBL_RESIZER_READ) 1308#define OMAP3_ISP_SBL_WRITE (OMAP3_ISP_SBL_CSI1_WRITE | \ 1309 OMAP3_ISP_SBL_CSI2A_WRITE | \ 1310 OMAP3_ISP_SBL_CSI2C_WRITE | \ 1311 OMAP3_ISP_SBL_CCDC_WRITE | \ 1312 OMAP3_ISP_SBL_PREVIEW_WRITE) 1313 1314void omap3isp_sbl_enable(struct isp_device *isp, enum isp_sbl_resource res) 1315{ 1316 u32 sbl = 0; 1317 1318 isp->sbl_resources |= res; 1319 1320 if (isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ) 1321 sbl |= ISPCTRL_SBL_SHARED_RPORTA; 1322 1323 if (isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ) 1324 sbl |= ISPCTRL_SBL_SHARED_RPORTB; 1325 1326 if (isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE) 1327 sbl |= ISPCTRL_SBL_SHARED_WPORTC; 1328 1329 if (isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE) 1330 sbl |= ISPCTRL_SBL_WR0_RAM_EN; 1331 1332 if (isp->sbl_resources & OMAP3_ISP_SBL_WRITE) 1333 sbl |= ISPCTRL_SBL_WR1_RAM_EN; 1334 1335 if (isp->sbl_resources & OMAP3_ISP_SBL_READ) 1336 sbl |= ISPCTRL_SBL_RD_RAM_EN; 1337 1338 isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl); 1339} 1340 1341void omap3isp_sbl_disable(struct isp_device *isp, enum isp_sbl_resource res) 1342{ 1343 u32 sbl = 0; 1344 1345 isp->sbl_resources &= ~res; 1346 1347 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ)) 1348 sbl |= ISPCTRL_SBL_SHARED_RPORTA; 1349 1350 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ)) 1351 sbl |= ISPCTRL_SBL_SHARED_RPORTB; 1352 1353 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE)) 1354 sbl |= ISPCTRL_SBL_SHARED_WPORTC; 1355 1356 if (!(isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE)) 1357 sbl |= ISPCTRL_SBL_WR0_RAM_EN; 1358 1359 if (!(isp->sbl_resources & OMAP3_ISP_SBL_WRITE)) 1360 sbl |= ISPCTRL_SBL_WR1_RAM_EN; 1361 1362 if (!(isp->sbl_resources & OMAP3_ISP_SBL_READ)) 1363 sbl |= ISPCTRL_SBL_RD_RAM_EN; 1364 1365 isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl); 1366} 1367 1368/* 1369 * isp_module_sync_idle - Helper to sync module with its idle state 1370 * @me: ISP submodule's media entity 1371 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization 1372 * @stopping: flag which tells module wants to stop 1373 * 1374 * This function checks if ISP submodule needs to wait for next interrupt. If 1375 * yes, makes the caller to sleep while waiting for such event. 1376 */ 1377int omap3isp_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait, 1378 atomic_t *stopping) 1379{ 1380 struct isp_pipeline *pipe = to_isp_pipeline(me); 1381 1382 if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED || 1383 (pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT && 1384 !isp_pipeline_ready(pipe))) 1385 return 0; 1386 1387 /* 1388 * atomic_set() doesn't include memory barrier on ARM platform for SMP 1389 * scenario. We'll call it here to avoid race conditions. 1390 */ 1391 atomic_set(stopping, 1); 1392 smp_mb(); 1393 1394 /* 1395 * If module is the last one, it's writing to memory. In this case, 1396 * it's necessary to check if the module is already paused due to 1397 * DMA queue underrun or if it has to wait for next interrupt to be 1398 * idle. 1399 * If it isn't the last one, the function won't sleep but *stopping 1400 * will still be set to warn next submodule caller's interrupt the 1401 * module wants to be idle. 1402 */ 1403 if (isp_pipeline_is_last(me)) { 1404 struct isp_video *video = pipe->output; 1405 unsigned long flags; 1406 spin_lock_irqsave(&video->irqlock, flags); 1407 if (video->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) { 1408 spin_unlock_irqrestore(&video->irqlock, flags); 1409 atomic_set(stopping, 0); 1410 smp_mb(); 1411 return 0; 1412 } 1413 spin_unlock_irqrestore(&video->irqlock, flags); 1414 if (!wait_event_timeout(*wait, !atomic_read(stopping), 1415 msecs_to_jiffies(1000))) { 1416 atomic_set(stopping, 0); 1417 smp_mb(); 1418 return -ETIMEDOUT; 1419 } 1420 } 1421 1422 return 0; 1423} 1424 1425/* 1426 * omap3isp_module_sync_is_stopping - Helper to verify if module was stopping 1427 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization 1428 * @stopping: flag which tells module wants to stop 1429 * 1430 * This function checks if ISP submodule was stopping. In case of yes, it 1431 * notices the caller by setting stopping to 0 and waking up the wait queue. 1432 * Returns 1 if it was stopping or 0 otherwise. 1433 */ 1434int omap3isp_module_sync_is_stopping(wait_queue_head_t *wait, 1435 atomic_t *stopping) 1436{ 1437 if (atomic_cmpxchg(stopping, 1, 0)) { 1438 wake_up(wait); 1439 return 1; 1440 } 1441 1442 return 0; 1443} 1444 1445/* -------------------------------------------------------------------------- 1446 * Clock management 1447 */ 1448 1449#define ISPCTRL_CLKS_MASK (ISPCTRL_H3A_CLK_EN | \ 1450 ISPCTRL_HIST_CLK_EN | \ 1451 ISPCTRL_RSZ_CLK_EN | \ 1452 (ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN) | \ 1453 (ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN)) 1454 1455static void __isp_subclk_update(struct isp_device *isp) 1456{ 1457 u32 clk = 0; 1458 1459 /* AEWB and AF share the same clock. */ 1460 if (isp->subclk_resources & 1461 (OMAP3_ISP_SUBCLK_AEWB | OMAP3_ISP_SUBCLK_AF)) 1462 clk |= ISPCTRL_H3A_CLK_EN; 1463 1464 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_HIST) 1465 clk |= ISPCTRL_HIST_CLK_EN; 1466 1467 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_RESIZER) 1468 clk |= ISPCTRL_RSZ_CLK_EN; 1469 1470 /* NOTE: For CCDC & Preview submodules, we need to affect internal 1471 * RAM as well. 1472 */ 1473 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_CCDC) 1474 clk |= ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN; 1475 1476 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_PREVIEW) 1477 clk |= ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN; 1478 1479 isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, 1480 ISPCTRL_CLKS_MASK, clk); 1481} 1482 1483void omap3isp_subclk_enable(struct isp_device *isp, 1484 enum isp_subclk_resource res) 1485{ 1486 isp->subclk_resources |= res; 1487 1488 __isp_subclk_update(isp); 1489} 1490 1491void omap3isp_subclk_disable(struct isp_device *isp, 1492 enum isp_subclk_resource res) 1493{ 1494 isp->subclk_resources &= ~res; 1495 1496 __isp_subclk_update(isp); 1497} 1498 1499/* 1500 * isp_enable_clocks - Enable ISP clocks 1501 * @isp: OMAP3 ISP device 1502 * 1503 * Return 0 if successful, or clk_prepare_enable return value if any of them 1504 * fails. 1505 */ 1506static int isp_enable_clocks(struct isp_device *isp) 1507{ 1508 int r; 1509 unsigned long rate; 1510 1511 r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_ICK]); 1512 if (r) { 1513 dev_err(isp->dev, "failed to enable cam_ick clock\n"); 1514 goto out_clk_enable_ick; 1515 } 1516 r = clk_set_rate(isp->clock[ISP_CLK_CAM_MCLK], CM_CAM_MCLK_HZ); 1517 if (r) { 1518 dev_err(isp->dev, "clk_set_rate for cam_mclk failed\n"); 1519 goto out_clk_enable_mclk; 1520 } 1521 r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_MCLK]); 1522 if (r) { 1523 dev_err(isp->dev, "failed to enable cam_mclk clock\n"); 1524 goto out_clk_enable_mclk; 1525 } 1526 rate = clk_get_rate(isp->clock[ISP_CLK_CAM_MCLK]); 1527 if (rate != CM_CAM_MCLK_HZ) 1528 dev_warn(isp->dev, "unexpected cam_mclk rate:\n" 1529 " expected : %d\n" 1530 " actual : %ld\n", CM_CAM_MCLK_HZ, rate); 1531 r = clk_prepare_enable(isp->clock[ISP_CLK_CSI2_FCK]); 1532 if (r) { 1533 dev_err(isp->dev, "failed to enable csi2_fck clock\n"); 1534 goto out_clk_enable_csi2_fclk; 1535 } 1536 return 0; 1537 1538out_clk_enable_csi2_fclk: 1539 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]); 1540out_clk_enable_mclk: 1541 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]); 1542out_clk_enable_ick: 1543 return r; 1544} 1545 1546/* 1547 * isp_disable_clocks - Disable ISP clocks 1548 * @isp: OMAP3 ISP device 1549 */ 1550static void isp_disable_clocks(struct isp_device *isp) 1551{ 1552 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]); 1553 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]); 1554 clk_disable_unprepare(isp->clock[ISP_CLK_CSI2_FCK]); 1555} 1556 1557static const char *isp_clocks[] = { 1558 "cam_ick", 1559 "cam_mclk", 1560 "csi2_96m_fck", 1561 "l3_ick", 1562}; 1563 1564static int isp_get_clocks(struct isp_device *isp) 1565{ 1566 struct clk *clk; 1567 unsigned int i; 1568 1569 for (i = 0; i < ARRAY_SIZE(isp_clocks); ++i) { 1570 clk = devm_clk_get(isp->dev, isp_clocks[i]); 1571 if (IS_ERR(clk)) { 1572 dev_err(isp->dev, "clk_get %s failed\n", isp_clocks[i]); 1573 return PTR_ERR(clk); 1574 } 1575 1576 isp->clock[i] = clk; 1577 } 1578 1579 return 0; 1580} 1581 1582/* 1583 * omap3isp_get - Acquire the ISP resource. 1584 * 1585 * Initializes the clocks for the first acquire. 1586 * 1587 * Increment the reference count on the ISP. If the first reference is taken, 1588 * enable clocks and power-up all submodules. 1589 * 1590 * Return a pointer to the ISP device structure, or NULL if an error occurred. 1591 */ 1592static struct isp_device *__omap3isp_get(struct isp_device *isp, bool irq) 1593{ 1594 struct isp_device *__isp = isp; 1595 1596 if (isp == NULL) 1597 return NULL; 1598 1599 mutex_lock(&isp->isp_mutex); 1600 if (isp->ref_count > 0) 1601 goto out; 1602 1603 if (isp_enable_clocks(isp) < 0) { 1604 __isp = NULL; 1605 goto out; 1606 } 1607 1608 /* We don't want to restore context before saving it! */ 1609 if (isp->has_context) 1610 isp_restore_ctx(isp); 1611 1612 if (irq) 1613 isp_enable_interrupts(isp); 1614 1615out: 1616 if (__isp != NULL) 1617 isp->ref_count++; 1618 mutex_unlock(&isp->isp_mutex); 1619 1620 return __isp; 1621} 1622 1623struct isp_device *omap3isp_get(struct isp_device *isp) 1624{ 1625 return __omap3isp_get(isp, true); 1626} 1627 1628/* 1629 * omap3isp_put - Release the ISP 1630 * 1631 * Decrement the reference count on the ISP. If the last reference is released, 1632 * power-down all submodules, disable clocks and free temporary buffers. 1633 */ 1634static void __omap3isp_put(struct isp_device *isp, bool save_ctx) 1635{ 1636 if (isp == NULL) 1637 return; 1638 1639 mutex_lock(&isp->isp_mutex); 1640 BUG_ON(isp->ref_count == 0); 1641 if (--isp->ref_count == 0) { 1642 isp_disable_interrupts(isp); 1643 if (save_ctx) { 1644 isp_save_ctx(isp); 1645 isp->has_context = 1; 1646 } 1647 /* Reset the ISP if an entity has failed to stop. This is the 1648 * only way to recover from such conditions. 1649 */ 1650 if (isp->crashed || isp->stop_failure) 1651 isp_reset(isp); 1652 isp_disable_clocks(isp); 1653 } 1654 mutex_unlock(&isp->isp_mutex); 1655} 1656 1657void omap3isp_put(struct isp_device *isp) 1658{ 1659 __omap3isp_put(isp, true); 1660} 1661 1662/* -------------------------------------------------------------------------- 1663 * Platform device driver 1664 */ 1665 1666/* 1667 * omap3isp_print_status - Prints the values of the ISP Control Module registers 1668 * @isp: OMAP3 ISP device 1669 */ 1670#define ISP_PRINT_REGISTER(isp, name)\ 1671 dev_dbg(isp->dev, "###ISP " #name "=0x%08x\n", \ 1672 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_##name)) 1673#define SBL_PRINT_REGISTER(isp, name)\ 1674 dev_dbg(isp->dev, "###SBL " #name "=0x%08x\n", \ 1675 isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_##name)) 1676 1677void omap3isp_print_status(struct isp_device *isp) 1678{ 1679 dev_dbg(isp->dev, "-------------ISP Register dump--------------\n"); 1680 1681 ISP_PRINT_REGISTER(isp, SYSCONFIG); 1682 ISP_PRINT_REGISTER(isp, SYSSTATUS); 1683 ISP_PRINT_REGISTER(isp, IRQ0ENABLE); 1684 ISP_PRINT_REGISTER(isp, IRQ0STATUS); 1685 ISP_PRINT_REGISTER(isp, TCTRL_GRESET_LENGTH); 1686 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_REPLAY); 1687 ISP_PRINT_REGISTER(isp, CTRL); 1688 ISP_PRINT_REGISTER(isp, TCTRL_CTRL); 1689 ISP_PRINT_REGISTER(isp, TCTRL_FRAME); 1690 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_DELAY); 1691 ISP_PRINT_REGISTER(isp, TCTRL_STRB_DELAY); 1692 ISP_PRINT_REGISTER(isp, TCTRL_SHUT_DELAY); 1693 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_LENGTH); 1694 ISP_PRINT_REGISTER(isp, TCTRL_STRB_LENGTH); 1695 ISP_PRINT_REGISTER(isp, TCTRL_SHUT_LENGTH); 1696 1697 SBL_PRINT_REGISTER(isp, PCR); 1698 SBL_PRINT_REGISTER(isp, SDR_REQ_EXP); 1699 1700 dev_dbg(isp->dev, "--------------------------------------------\n"); 1701} 1702 1703#ifdef CONFIG_PM 1704 1705/* 1706 * Power management support. 1707 * 1708 * As the ISP can't properly handle an input video stream interruption on a non 1709 * frame boundary, the ISP pipelines need to be stopped before sensors get 1710 * suspended. However, as suspending the sensors can require a running clock, 1711 * which can be provided by the ISP, the ISP can't be completely suspended 1712 * before the sensor. 1713 * 1714 * To solve this problem power management support is split into prepare/complete 1715 * and suspend/resume operations. The pipelines are stopped in prepare() and the 1716 * ISP clocks get disabled in suspend(). Similarly, the clocks are reenabled in 1717 * resume(), and the the pipelines are restarted in complete(). 1718 * 1719 * TODO: PM dependencies between the ISP and sensors are not modelled explicitly 1720 * yet. 1721 */ 1722static int isp_pm_prepare(struct device *dev) 1723{ 1724 struct isp_device *isp = dev_get_drvdata(dev); 1725 int reset; 1726 1727 WARN_ON(mutex_is_locked(&isp->isp_mutex)); 1728 1729 if (isp->ref_count == 0) 1730 return 0; 1731 1732 reset = isp_suspend_modules(isp); 1733 isp_disable_interrupts(isp); 1734 isp_save_ctx(isp); 1735 if (reset) 1736 isp_reset(isp); 1737 1738 return 0; 1739} 1740 1741static int isp_pm_suspend(struct device *dev) 1742{ 1743 struct isp_device *isp = dev_get_drvdata(dev); 1744 1745 WARN_ON(mutex_is_locked(&isp->isp_mutex)); 1746 1747 if (isp->ref_count) 1748 isp_disable_clocks(isp); 1749 1750 return 0; 1751} 1752 1753static int isp_pm_resume(struct device *dev) 1754{ 1755 struct isp_device *isp = dev_get_drvdata(dev); 1756 1757 if (isp->ref_count == 0) 1758 return 0; 1759 1760 return isp_enable_clocks(isp); 1761} 1762 1763static void isp_pm_complete(struct device *dev) 1764{ 1765 struct isp_device *isp = dev_get_drvdata(dev); 1766 1767 if (isp->ref_count == 0) 1768 return; 1769 1770 isp_restore_ctx(isp); 1771 isp_enable_interrupts(isp); 1772 isp_resume_modules(isp); 1773} 1774 1775#else 1776 1777#define isp_pm_prepare NULL 1778#define isp_pm_suspend NULL 1779#define isp_pm_resume NULL 1780#define isp_pm_complete NULL 1781 1782#endif /* CONFIG_PM */ 1783 1784static void isp_unregister_entities(struct isp_device *isp) 1785{ 1786 omap3isp_csi2_unregister_entities(&isp->isp_csi2a); 1787 omap3isp_ccp2_unregister_entities(&isp->isp_ccp2); 1788 omap3isp_ccdc_unregister_entities(&isp->isp_ccdc); 1789 omap3isp_preview_unregister_entities(&isp->isp_prev); 1790 omap3isp_resizer_unregister_entities(&isp->isp_res); 1791 omap3isp_stat_unregister_entities(&isp->isp_aewb); 1792 omap3isp_stat_unregister_entities(&isp->isp_af); 1793 omap3isp_stat_unregister_entities(&isp->isp_hist); 1794 1795 v4l2_device_unregister(&isp->v4l2_dev); 1796 media_device_unregister(&isp->media_dev); 1797} 1798 1799/* 1800 * isp_register_subdev - Register a sub-device 1801 * @isp: OMAP3 ISP device 1802 * @isp_subdev: platform data related to a sub-device 1803 * 1804 * Register an I2C sub-device which has not been registered by other 1805 * means (such as the Device Tree). 1806 * 1807 * Return a pointer to the sub-device if it has been successfully 1808 * registered, or NULL otherwise. 1809 */ 1810static struct v4l2_subdev * 1811isp_register_subdev(struct isp_device *isp, 1812 struct isp_platform_subdev *isp_subdev) 1813{ 1814 struct i2c_adapter *adapter; 1815 struct v4l2_subdev *sd; 1816 1817 if (isp_subdev->board_info == NULL) 1818 return NULL; 1819 1820 adapter = i2c_get_adapter(isp_subdev->i2c_adapter_id); 1821 if (adapter == NULL) { 1822 dev_err(isp->dev, 1823 "%s: Unable to get I2C adapter %d for device %s\n", 1824 __func__, isp_subdev->i2c_adapter_id, 1825 isp_subdev->board_info->type); 1826 return NULL; 1827 } 1828 1829 sd = v4l2_i2c_new_subdev_board(&isp->v4l2_dev, adapter, 1830 isp_subdev->board_info, NULL); 1831 if (sd == NULL) { 1832 dev_err(isp->dev, "%s: Unable to register subdev %s\n", 1833 __func__, isp_subdev->board_info->type); 1834 return NULL; 1835 } 1836 1837 return sd; 1838} 1839 1840static int isp_link_entity( 1841 struct isp_device *isp, struct media_entity *entity, 1842 enum isp_interface_type interface) 1843{ 1844 struct media_entity *input; 1845 unsigned int flags; 1846 unsigned int pad; 1847 unsigned int i; 1848 1849 /* Connect the sensor to the correct interface module. 1850 * Parallel sensors are connected directly to the CCDC, while 1851 * serial sensors are connected to the CSI2a, CCP2b or CSI2c 1852 * receiver through CSIPHY1 or CSIPHY2. 1853 */ 1854 switch (interface) { 1855 case ISP_INTERFACE_PARALLEL: 1856 input = &isp->isp_ccdc.subdev.entity; 1857 pad = CCDC_PAD_SINK; 1858 flags = 0; 1859 break; 1860 1861 case ISP_INTERFACE_CSI2A_PHY2: 1862 input = &isp->isp_csi2a.subdev.entity; 1863 pad = CSI2_PAD_SINK; 1864 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED; 1865 break; 1866 1867 case ISP_INTERFACE_CCP2B_PHY1: 1868 case ISP_INTERFACE_CCP2B_PHY2: 1869 input = &isp->isp_ccp2.subdev.entity; 1870 pad = CCP2_PAD_SINK; 1871 flags = 0; 1872 break; 1873 1874 case ISP_INTERFACE_CSI2C_PHY1: 1875 input = &isp->isp_csi2c.subdev.entity; 1876 pad = CSI2_PAD_SINK; 1877 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED; 1878 break; 1879 1880 default: 1881 dev_err(isp->dev, "%s: invalid interface type %u\n", __func__, 1882 interface); 1883 return -EINVAL; 1884 } 1885 1886 /* 1887 * Not all interfaces are available on all revisions of the 1888 * ISP. The sub-devices of those interfaces aren't initialised 1889 * in such a case. Check this by ensuring the num_pads is 1890 * non-zero. 1891 */ 1892 if (!input->num_pads) { 1893 dev_err(isp->dev, "%s: invalid input %u\n", entity->name, 1894 interface); 1895 return -EINVAL; 1896 } 1897 1898 for (i = 0; i < entity->num_pads; i++) { 1899 if (entity->pads[i].flags & MEDIA_PAD_FL_SOURCE) 1900 break; 1901 } 1902 if (i == entity->num_pads) { 1903 dev_err(isp->dev, "%s: no source pad in external entity\n", 1904 __func__); 1905 return -EINVAL; 1906 } 1907 1908 return media_entity_create_link(entity, i, input, pad, flags); 1909} 1910 1911static int isp_register_entities(struct isp_device *isp) 1912{ 1913 struct isp_platform_data *pdata = isp->pdata; 1914 struct isp_platform_subdev *isp_subdev; 1915 int ret; 1916 1917 isp->media_dev.dev = isp->dev; 1918 strlcpy(isp->media_dev.model, "TI OMAP3 ISP", 1919 sizeof(isp->media_dev.model)); 1920 isp->media_dev.hw_revision = isp->revision; 1921 isp->media_dev.link_notify = isp_pipeline_link_notify; 1922 ret = media_device_register(&isp->media_dev); 1923 if (ret < 0) { 1924 dev_err(isp->dev, "%s: Media device registration failed (%d)\n", 1925 __func__, ret); 1926 return ret; 1927 } 1928 1929 isp->v4l2_dev.mdev = &isp->media_dev; 1930 ret = v4l2_device_register(isp->dev, &isp->v4l2_dev); 1931 if (ret < 0) { 1932 dev_err(isp->dev, "%s: V4L2 device registration failed (%d)\n", 1933 __func__, ret); 1934 goto done; 1935 } 1936 1937 /* Register internal entities */ 1938 ret = omap3isp_ccp2_register_entities(&isp->isp_ccp2, &isp->v4l2_dev); 1939 if (ret < 0) 1940 goto done; 1941 1942 ret = omap3isp_csi2_register_entities(&isp->isp_csi2a, &isp->v4l2_dev); 1943 if (ret < 0) 1944 goto done; 1945 1946 ret = omap3isp_ccdc_register_entities(&isp->isp_ccdc, &isp->v4l2_dev); 1947 if (ret < 0) 1948 goto done; 1949 1950 ret = omap3isp_preview_register_entities(&isp->isp_prev, 1951 &isp->v4l2_dev); 1952 if (ret < 0) 1953 goto done; 1954 1955 ret = omap3isp_resizer_register_entities(&isp->isp_res, &isp->v4l2_dev); 1956 if (ret < 0) 1957 goto done; 1958 1959 ret = omap3isp_stat_register_entities(&isp->isp_aewb, &isp->v4l2_dev); 1960 if (ret < 0) 1961 goto done; 1962 1963 ret = omap3isp_stat_register_entities(&isp->isp_af, &isp->v4l2_dev); 1964 if (ret < 0) 1965 goto done; 1966 1967 ret = omap3isp_stat_register_entities(&isp->isp_hist, &isp->v4l2_dev); 1968 if (ret < 0) 1969 goto done; 1970 1971 /* 1972 * Device Tree --- the external sub-devices will be registered 1973 * later. The same goes for the sub-device node registration. 1974 */ 1975 if (isp->dev->of_node) 1976 return 0; 1977 1978 /* Register external entities */ 1979 for (isp_subdev = pdata ? pdata->subdevs : NULL; 1980 isp_subdev && isp_subdev->board_info; isp_subdev++) { 1981 struct v4l2_subdev *sd; 1982 1983 sd = isp_register_subdev(isp, isp_subdev); 1984 1985 /* 1986 * No bus information --- this is either a flash or a 1987 * lens subdev. 1988 */ 1989 if (!sd || !isp_subdev->bus) 1990 continue; 1991 1992 sd->host_priv = isp_subdev->bus; 1993 1994 ret = isp_link_entity(isp, &sd->entity, 1995 isp_subdev->bus->interface); 1996 if (ret < 0) 1997 goto done; 1998 } 1999 2000 ret = v4l2_device_register_subdev_nodes(&isp->v4l2_dev); 2001 2002done: 2003 if (ret < 0) { 2004 isp_unregister_entities(isp); 2005 v4l2_async_notifier_unregister(&isp->notifier); 2006 } 2007 2008 return ret; 2009} 2010 2011static void isp_cleanup_modules(struct isp_device *isp) 2012{ 2013 omap3isp_h3a_aewb_cleanup(isp); 2014 omap3isp_h3a_af_cleanup(isp); 2015 omap3isp_hist_cleanup(isp); 2016 omap3isp_resizer_cleanup(isp); 2017 omap3isp_preview_cleanup(isp); 2018 omap3isp_ccdc_cleanup(isp); 2019 omap3isp_ccp2_cleanup(isp); 2020 omap3isp_csi2_cleanup(isp); 2021} 2022 2023static int isp_initialize_modules(struct isp_device *isp) 2024{ 2025 int ret; 2026 2027 ret = omap3isp_csiphy_init(isp); 2028 if (ret < 0) { 2029 dev_err(isp->dev, "CSI PHY initialization failed\n"); 2030 goto error_csiphy; 2031 } 2032 2033 ret = omap3isp_csi2_init(isp); 2034 if (ret < 0) { 2035 dev_err(isp->dev, "CSI2 initialization failed\n"); 2036 goto error_csi2; 2037 } 2038 2039 ret = omap3isp_ccp2_init(isp); 2040 if (ret < 0) { 2041 dev_err(isp->dev, "CCP2 initialization failed\n"); 2042 goto error_ccp2; 2043 } 2044 2045 ret = omap3isp_ccdc_init(isp); 2046 if (ret < 0) { 2047 dev_err(isp->dev, "CCDC initialization failed\n"); 2048 goto error_ccdc; 2049 } 2050 2051 ret = omap3isp_preview_init(isp); 2052 if (ret < 0) { 2053 dev_err(isp->dev, "Preview initialization failed\n"); 2054 goto error_preview; 2055 } 2056 2057 ret = omap3isp_resizer_init(isp); 2058 if (ret < 0) { 2059 dev_err(isp->dev, "Resizer initialization failed\n"); 2060 goto error_resizer; 2061 } 2062 2063 ret = omap3isp_hist_init(isp); 2064 if (ret < 0) { 2065 dev_err(isp->dev, "Histogram initialization failed\n"); 2066 goto error_hist; 2067 } 2068 2069 ret = omap3isp_h3a_aewb_init(isp); 2070 if (ret < 0) { 2071 dev_err(isp->dev, "H3A AEWB initialization failed\n"); 2072 goto error_h3a_aewb; 2073 } 2074 2075 ret = omap3isp_h3a_af_init(isp); 2076 if (ret < 0) { 2077 dev_err(isp->dev, "H3A AF initialization failed\n"); 2078 goto error_h3a_af; 2079 } 2080 2081 /* Connect the submodules. */ 2082 ret = media_entity_create_link( 2083 &isp->isp_csi2a.subdev.entity, CSI2_PAD_SOURCE, 2084 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0); 2085 if (ret < 0) 2086 goto error_link; 2087 2088 ret = media_entity_create_link( 2089 &isp->isp_ccp2.subdev.entity, CCP2_PAD_SOURCE, 2090 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0); 2091 if (ret < 0) 2092 goto error_link; 2093 2094 ret = media_entity_create_link( 2095 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP, 2096 &isp->isp_prev.subdev.entity, PREV_PAD_SINK, 0); 2097 if (ret < 0) 2098 goto error_link; 2099 2100 ret = media_entity_create_link( 2101 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_OF, 2102 &isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0); 2103 if (ret < 0) 2104 goto error_link; 2105 2106 ret = media_entity_create_link( 2107 &isp->isp_prev.subdev.entity, PREV_PAD_SOURCE, 2108 &isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0); 2109 if (ret < 0) 2110 goto error_link; 2111 2112 ret = media_entity_create_link( 2113 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP, 2114 &isp->isp_aewb.subdev.entity, 0, 2115 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE); 2116 if (ret < 0) 2117 goto error_link; 2118 2119 ret = media_entity_create_link( 2120 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP, 2121 &isp->isp_af.subdev.entity, 0, 2122 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE); 2123 if (ret < 0) 2124 goto error_link; 2125 2126 ret = media_entity_create_link( 2127 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP, 2128 &isp->isp_hist.subdev.entity, 0, 2129 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE); 2130 if (ret < 0) 2131 goto error_link; 2132 2133 return 0; 2134 2135error_link: 2136 omap3isp_h3a_af_cleanup(isp); 2137error_h3a_af: 2138 omap3isp_h3a_aewb_cleanup(isp); 2139error_h3a_aewb: 2140 omap3isp_hist_cleanup(isp); 2141error_hist: 2142 omap3isp_resizer_cleanup(isp); 2143error_resizer: 2144 omap3isp_preview_cleanup(isp); 2145error_preview: 2146 omap3isp_ccdc_cleanup(isp); 2147error_ccdc: 2148 omap3isp_ccp2_cleanup(isp); 2149error_ccp2: 2150 omap3isp_csi2_cleanup(isp); 2151error_csi2: 2152error_csiphy: 2153 return ret; 2154} 2155 2156static void isp_detach_iommu(struct isp_device *isp) 2157{ 2158 arm_iommu_release_mapping(isp->mapping); 2159 isp->mapping = NULL; 2160 iommu_group_remove_device(isp->dev); 2161} 2162 2163static int isp_attach_iommu(struct isp_device *isp) 2164{ 2165 struct dma_iommu_mapping *mapping; 2166 struct iommu_group *group; 2167 int ret; 2168 2169 /* Create a device group and add the device to it. */ 2170 group = iommu_group_alloc(); 2171 if (IS_ERR(group)) { 2172 dev_err(isp->dev, "failed to allocate IOMMU group\n"); 2173 return PTR_ERR(group); 2174 } 2175 2176 ret = iommu_group_add_device(group, isp->dev); 2177 iommu_group_put(group); 2178 2179 if (ret < 0) { 2180 dev_err(isp->dev, "failed to add device to IPMMU group\n"); 2181 return ret; 2182 } 2183 2184 /* 2185 * Create the ARM mapping, used by the ARM DMA mapping core to allocate 2186 * VAs. This will allocate a corresponding IOMMU domain. 2187 */ 2188 mapping = arm_iommu_create_mapping(&platform_bus_type, SZ_1G, SZ_2G); 2189 if (IS_ERR(mapping)) { 2190 dev_err(isp->dev, "failed to create ARM IOMMU mapping\n"); 2191 ret = PTR_ERR(mapping); 2192 goto error; 2193 } 2194 2195 isp->mapping = mapping; 2196 2197 /* Attach the ARM VA mapping to the device. */ 2198 ret = arm_iommu_attach_device(isp->dev, mapping); 2199 if (ret < 0) { 2200 dev_err(isp->dev, "failed to attach device to VA mapping\n"); 2201 goto error; 2202 } 2203 2204 return 0; 2205 2206error: 2207 isp_detach_iommu(isp); 2208 return ret; 2209} 2210 2211/* 2212 * isp_remove - Remove ISP platform device 2213 * @pdev: Pointer to ISP platform device 2214 * 2215 * Always returns 0. 2216 */ 2217static int isp_remove(struct platform_device *pdev) 2218{ 2219 struct isp_device *isp = platform_get_drvdata(pdev); 2220 2221 v4l2_async_notifier_unregister(&isp->notifier); 2222 isp_unregister_entities(isp); 2223 isp_cleanup_modules(isp); 2224 isp_xclk_cleanup(isp); 2225 2226 __omap3isp_get(isp, false); 2227 isp_detach_iommu(isp); 2228 __omap3isp_put(isp, false); 2229 2230 return 0; 2231} 2232 2233enum isp_of_phy { 2234 ISP_OF_PHY_PARALLEL = 0, 2235 ISP_OF_PHY_CSIPHY1, 2236 ISP_OF_PHY_CSIPHY2, 2237}; 2238 2239static int isp_of_parse_node(struct device *dev, struct device_node *node, 2240 struct isp_async_subdev *isd) 2241{ 2242 struct isp_bus_cfg *buscfg = &isd->bus; 2243 struct v4l2_of_endpoint vep; 2244 unsigned int i; 2245 2246 v4l2_of_parse_endpoint(node, &vep); 2247 2248 dev_dbg(dev, "parsing endpoint %s, interface %u\n", node->full_name, 2249 vep.base.port); 2250 2251 switch (vep.base.port) { 2252 case ISP_OF_PHY_PARALLEL: 2253 buscfg->interface = ISP_INTERFACE_PARALLEL; 2254 buscfg->bus.parallel.data_lane_shift = 2255 vep.bus.parallel.data_shift; 2256 buscfg->bus.parallel.clk_pol = 2257 !!(vep.bus.parallel.flags 2258 & V4L2_MBUS_PCLK_SAMPLE_FALLING); 2259 buscfg->bus.parallel.hs_pol = 2260 !!(vep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW); 2261 buscfg->bus.parallel.vs_pol = 2262 !!(vep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW); 2263 buscfg->bus.parallel.fld_pol = 2264 !!(vep.bus.parallel.flags & V4L2_MBUS_FIELD_EVEN_LOW); 2265 buscfg->bus.parallel.data_pol = 2266 !!(vep.bus.parallel.flags & V4L2_MBUS_DATA_ACTIVE_LOW); 2267 break; 2268 2269 case ISP_OF_PHY_CSIPHY1: 2270 case ISP_OF_PHY_CSIPHY2: 2271 /* FIXME: always assume CSI-2 for now. */ 2272 switch (vep.base.port) { 2273 case ISP_OF_PHY_CSIPHY1: 2274 buscfg->interface = ISP_INTERFACE_CSI2C_PHY1; 2275 break; 2276 case ISP_OF_PHY_CSIPHY2: 2277 buscfg->interface = ISP_INTERFACE_CSI2A_PHY2; 2278 break; 2279 } 2280 buscfg->bus.csi2.lanecfg.clk.pos = vep.bus.mipi_csi2.clock_lane; 2281 buscfg->bus.csi2.lanecfg.clk.pol = 2282 vep.bus.mipi_csi2.lane_polarities[0]; 2283 dev_dbg(dev, "clock lane polarity %u, pos %u\n", 2284 buscfg->bus.csi2.lanecfg.clk.pol, 2285 buscfg->bus.csi2.lanecfg.clk.pos); 2286 2287 for (i = 0; i < ISP_CSIPHY2_NUM_DATA_LANES; i++) { 2288 buscfg->bus.csi2.lanecfg.data[i].pos = 2289 vep.bus.mipi_csi2.data_lanes[i]; 2290 buscfg->bus.csi2.lanecfg.data[i].pol = 2291 vep.bus.mipi_csi2.lane_polarities[i + 1]; 2292 dev_dbg(dev, "data lane %u polarity %u, pos %u\n", i, 2293 buscfg->bus.csi2.lanecfg.data[i].pol, 2294 buscfg->bus.csi2.lanecfg.data[i].pos); 2295 } 2296 2297 /* 2298 * FIXME: now we assume the CRC is always there. 2299 * Implement a way to obtain this information from the 2300 * sensor. Frame descriptors, perhaps? 2301 */ 2302 buscfg->bus.csi2.crc = 1; 2303 break; 2304 2305 default: 2306 dev_warn(dev, "%s: invalid interface %u\n", node->full_name, 2307 vep.base.port); 2308 break; 2309 } 2310 2311 return 0; 2312} 2313 2314static int isp_of_parse_nodes(struct device *dev, 2315 struct v4l2_async_notifier *notifier) 2316{ 2317 struct device_node *node = NULL; 2318 2319 notifier->subdevs = devm_kcalloc( 2320 dev, ISP_MAX_SUBDEVS, sizeof(*notifier->subdevs), GFP_KERNEL); 2321 if (!notifier->subdevs) 2322 return -ENOMEM; 2323 2324 while (notifier->num_subdevs < ISP_MAX_SUBDEVS && 2325 (node = of_graph_get_next_endpoint(dev->of_node, node))) { 2326 struct isp_async_subdev *isd; 2327 2328 isd = devm_kzalloc(dev, sizeof(*isd), GFP_KERNEL); 2329 if (!isd) { 2330 of_node_put(node); 2331 return -ENOMEM; 2332 } 2333 2334 notifier->subdevs[notifier->num_subdevs] = &isd->asd; 2335 2336 if (isp_of_parse_node(dev, node, isd)) { 2337 of_node_put(node); 2338 return -EINVAL; 2339 } 2340 2341 isd->asd.match.of.node = of_graph_get_remote_port_parent(node); 2342 of_node_put(node); 2343 if (!isd->asd.match.of.node) { 2344 dev_warn(dev, "bad remote port parent\n"); 2345 return -EINVAL; 2346 } 2347 2348 isd->asd.match_type = V4L2_ASYNC_MATCH_OF; 2349 notifier->num_subdevs++; 2350 } 2351 2352 return notifier->num_subdevs; 2353} 2354 2355static int isp_subdev_notifier_bound(struct v4l2_async_notifier *async, 2356 struct v4l2_subdev *subdev, 2357 struct v4l2_async_subdev *asd) 2358{ 2359 struct isp_device *isp = container_of(async, struct isp_device, 2360 notifier); 2361 struct isp_async_subdev *isd = 2362 container_of(asd, struct isp_async_subdev, asd); 2363 int ret; 2364 2365 ret = isp_link_entity(isp, &subdev->entity, isd->bus.interface); 2366 if (ret < 0) 2367 return ret; 2368 2369 isd->sd = subdev; 2370 isd->sd->host_priv = &isd->bus; 2371 2372 return ret; 2373} 2374 2375static int isp_subdev_notifier_complete(struct v4l2_async_notifier *async) 2376{ 2377 struct isp_device *isp = container_of(async, struct isp_device, 2378 notifier); 2379 2380 return v4l2_device_register_subdev_nodes(&isp->v4l2_dev); 2381} 2382 2383/* 2384 * isp_probe - Probe ISP platform device 2385 * @pdev: Pointer to ISP platform device 2386 * 2387 * Returns 0 if successful, 2388 * -ENOMEM if no memory available, 2389 * -ENODEV if no platform device resources found 2390 * or no space for remapping registers, 2391 * -EINVAL if couldn't install ISR, 2392 * or clk_get return error value. 2393 */ 2394static int isp_probe(struct platform_device *pdev) 2395{ 2396 struct isp_device *isp; 2397 struct resource *mem; 2398 int ret; 2399 int i, m; 2400 2401 isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL); 2402 if (!isp) { 2403 dev_err(&pdev->dev, "could not allocate memory\n"); 2404 return -ENOMEM; 2405 } 2406 2407 if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { 2408 ret = of_property_read_u32(pdev->dev.of_node, "ti,phy-type", 2409 &isp->phy_type); 2410 if (ret) 2411 return ret; 2412 2413 isp->syscon = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 2414 "syscon"); 2415 if (IS_ERR(isp->syscon)) 2416 return PTR_ERR(isp->syscon); 2417 2418 ret = of_property_read_u32_index(pdev->dev.of_node, "syscon", 1, 2419 &isp->syscon_offset); 2420 if (ret) 2421 return ret; 2422 2423 ret = isp_of_parse_nodes(&pdev->dev, &isp->notifier); 2424 if (ret < 0) 2425 return ret; 2426 ret = v4l2_async_notifier_register(&isp->v4l2_dev, 2427 &isp->notifier); 2428 if (ret) 2429 return ret; 2430 } else { 2431 isp->pdata = pdev->dev.platform_data; 2432 isp->syscon = syscon_regmap_lookup_by_pdevname("syscon.0"); 2433 if (IS_ERR(isp->syscon)) 2434 return PTR_ERR(isp->syscon); 2435 dev_warn(&pdev->dev, 2436 "Platform data support is deprecated! Please move to DT now!\n"); 2437 } 2438 2439 isp->autoidle = autoidle; 2440 2441 mutex_init(&isp->isp_mutex); 2442 spin_lock_init(&isp->stat_lock); 2443 2444 isp->dev = &pdev->dev; 2445 isp->ref_count = 0; 2446 2447 ret = dma_coerce_mask_and_coherent(isp->dev, DMA_BIT_MASK(32)); 2448 if (ret) 2449 goto error; 2450 2451 platform_set_drvdata(pdev, isp); 2452 2453 /* Regulators */ 2454 isp->isp_csiphy1.vdd = devm_regulator_get(&pdev->dev, "vdd-csiphy1"); 2455 isp->isp_csiphy2.vdd = devm_regulator_get(&pdev->dev, "vdd-csiphy2"); 2456 2457 /* Clocks 2458 * 2459 * The ISP clock tree is revision-dependent. We thus need to enable ICLK 2460 * manually to read the revision before calling __omap3isp_get(). 2461 * 2462 * Start by mapping the ISP MMIO area, which is in two pieces. 2463 * The ISP IOMMU is in between. Map both now, and fill in the 2464 * ISP revision specific portions a little later in the 2465 * function. 2466 */ 2467 for (i = 0; i < 2; i++) { 2468 unsigned int map_idx = i ? OMAP3_ISP_IOMEM_CSI2A_REGS1 : 0; 2469 2470 mem = platform_get_resource(pdev, IORESOURCE_MEM, i); 2471 isp->mmio_base[map_idx] = 2472 devm_ioremap_resource(isp->dev, mem); 2473 if (IS_ERR(isp->mmio_base[map_idx])) 2474 return PTR_ERR(isp->mmio_base[map_idx]); 2475 } 2476 2477 ret = isp_get_clocks(isp); 2478 if (ret < 0) 2479 goto error; 2480 2481 ret = clk_enable(isp->clock[ISP_CLK_CAM_ICK]); 2482 if (ret < 0) 2483 goto error; 2484 2485 isp->revision = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION); 2486 dev_info(isp->dev, "Revision %d.%d found\n", 2487 (isp->revision & 0xf0) >> 4, isp->revision & 0x0f); 2488 2489 clk_disable(isp->clock[ISP_CLK_CAM_ICK]); 2490 2491 if (__omap3isp_get(isp, false) == NULL) { 2492 ret = -ENODEV; 2493 goto error; 2494 } 2495 2496 ret = isp_reset(isp); 2497 if (ret < 0) 2498 goto error_isp; 2499 2500 ret = isp_xclk_init(isp); 2501 if (ret < 0) 2502 goto error_isp; 2503 2504 /* Memory resources */ 2505 for (m = 0; m < ARRAY_SIZE(isp_res_maps); m++) 2506 if (isp->revision == isp_res_maps[m].isp_rev) 2507 break; 2508 2509 if (m == ARRAY_SIZE(isp_res_maps)) { 2510 dev_err(isp->dev, "No resource map found for ISP rev %d.%d\n", 2511 (isp->revision & 0xf0) >> 4, isp->revision & 0xf); 2512 ret = -ENODEV; 2513 goto error_isp; 2514 } 2515 2516 if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node) { 2517 isp->syscon_offset = isp_res_maps[m].syscon_offset; 2518 isp->phy_type = isp_res_maps[m].phy_type; 2519 } 2520 2521 for (i = 1; i < OMAP3_ISP_IOMEM_CSI2A_REGS1; i++) 2522 isp->mmio_base[i] = 2523 isp->mmio_base[0] + isp_res_maps[m].offset[i]; 2524 2525 for (i = OMAP3_ISP_IOMEM_CSIPHY2; i < OMAP3_ISP_IOMEM_LAST; i++) 2526 isp->mmio_base[i] = 2527 isp->mmio_base[OMAP3_ISP_IOMEM_CSI2A_REGS1] 2528 + isp_res_maps[m].offset[i]; 2529 2530 isp->mmio_hist_base_phys = 2531 mem->start + isp_res_maps[m].offset[OMAP3_ISP_IOMEM_HIST]; 2532 2533 /* IOMMU */ 2534 ret = isp_attach_iommu(isp); 2535 if (ret < 0) { 2536 dev_err(&pdev->dev, "unable to attach to IOMMU\n"); 2537 goto error_isp; 2538 } 2539 2540 /* Interrupt */ 2541 isp->irq_num = platform_get_irq(pdev, 0); 2542 if (isp->irq_num <= 0) { 2543 dev_err(isp->dev, "No IRQ resource\n"); 2544 ret = -ENODEV; 2545 goto error_iommu; 2546 } 2547 2548 if (devm_request_irq(isp->dev, isp->irq_num, isp_isr, IRQF_SHARED, 2549 "OMAP3 ISP", isp)) { 2550 dev_err(isp->dev, "Unable to request IRQ\n"); 2551 ret = -EINVAL; 2552 goto error_iommu; 2553 } 2554 2555 /* Entities */ 2556 ret = isp_initialize_modules(isp); 2557 if (ret < 0) 2558 goto error_iommu; 2559 2560 isp->notifier.bound = isp_subdev_notifier_bound; 2561 isp->notifier.complete = isp_subdev_notifier_complete; 2562 2563 ret = isp_register_entities(isp); 2564 if (ret < 0) 2565 goto error_modules; 2566 2567 isp_core_init(isp, 1); 2568 omap3isp_put(isp); 2569 2570 return 0; 2571 2572error_modules: 2573 isp_cleanup_modules(isp); 2574error_iommu: 2575 isp_detach_iommu(isp); 2576error_isp: 2577 isp_xclk_cleanup(isp); 2578 __omap3isp_put(isp, false); 2579error: 2580 mutex_destroy(&isp->isp_mutex); 2581 2582 return ret; 2583} 2584 2585static const struct dev_pm_ops omap3isp_pm_ops = { 2586 .prepare = isp_pm_prepare, 2587 .suspend = isp_pm_suspend, 2588 .resume = isp_pm_resume, 2589 .complete = isp_pm_complete, 2590}; 2591 2592static struct platform_device_id omap3isp_id_table[] = { 2593 { "omap3isp", 0 }, 2594 { }, 2595}; 2596MODULE_DEVICE_TABLE(platform, omap3isp_id_table); 2597 2598static const struct of_device_id omap3isp_of_table[] = { 2599 { .compatible = "ti,omap3-isp" }, 2600 { }, 2601}; 2602 2603static struct platform_driver omap3isp_driver = { 2604 .probe = isp_probe, 2605 .remove = isp_remove, 2606 .id_table = omap3isp_id_table, 2607 .driver = { 2608 .name = "omap3isp", 2609 .pm = &omap3isp_pm_ops, 2610 .of_match_table = omap3isp_of_table, 2611 }, 2612}; 2613 2614module_platform_driver(omap3isp_driver); 2615 2616MODULE_AUTHOR("Nokia Corporation"); 2617MODULE_DESCRIPTION("TI OMAP3 ISP driver"); 2618MODULE_LICENSE("GPL"); 2619MODULE_VERSION(ISP_VIDEO_DRIVER_VERSION); 2620