drivers/media/platform/exynos4-is/fimc-is.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
   4  *
   5  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
   6  *
   7  * Authors: Sylwester Nawrocki <s.nawrocki@samsung.com>
   8  *          Younghwan Joo <yhwan.joo@samsung.com>
   9  */
  10 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
  11
  12 #include <linux/device.h>
  13 #include <linux/debugfs.h>
  14 #include <linux/delay.h>
  15 #include <linux/dma-contiguous.h>
  16 #include <linux/errno.h>
  17 #include <linux/firmware.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/i2c.h>
  22 #include <linux/of_irq.h>
  23 #include <linux/of_address.h>
  24 #include <linux/of_graph.h>
  25 #include <linux/of_platform.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/slab.h>
  29 #include <linux/types.h>
  30 #include <linux/videodev2.h>
  31 #include <media/videobuf2-dma-contig.h>
  32
  33 #include "media-dev.h"
  34 #include "fimc-is.h"
  35 #include "fimc-is-command.h"
  36 #include "fimc-is-errno.h"
  37 #include "fimc-is-i2c.h"
  38 #include "fimc-is-param.h"
  39 #include "fimc-is-regs.h"
  40
  41
  42 static char *fimc_is_clocks[ISS_CLKS_MAX] = {
  43         [ISS_CLK_PPMUISPX]              = "ppmuispx",
  44         [ISS_CLK_PPMUISPMX]             = "ppmuispmx",
  45         [ISS_CLK_LITE0]                 = "lite0",
  46         [ISS_CLK_LITE1]                 = "lite1",
  47         [ISS_CLK_MPLL]                  = "mpll",
  48         [ISS_CLK_ISP]                   = "isp",
  49         [ISS_CLK_DRC]                   = "drc",
  50         [ISS_CLK_FD]                    = "fd",
  51         [ISS_CLK_MCUISP]                = "mcuisp",
  52         [ISS_CLK_GICISP]                = "gicisp",
  53         [ISS_CLK_PWM_ISP]               = "pwm_isp",
  54         [ISS_CLK_MCUCTL_ISP]            = "mcuctl_isp",
  55         [ISS_CLK_UART]                  = "uart",
  56         [ISS_CLK_ISP_DIV0]              = "ispdiv0",
  57         [ISS_CLK_ISP_DIV1]              = "ispdiv1",
  58         [ISS_CLK_MCUISP_DIV0]           = "mcuispdiv0",
  59         [ISS_CLK_MCUISP_DIV1]           = "mcuispdiv1",
  60         [ISS_CLK_ACLK200]               = "aclk200",
  61         [ISS_CLK_ACLK200_DIV]           = "div_aclk200",
  62         [ISS_CLK_ACLK400MCUISP]         = "aclk400mcuisp",
  63         [ISS_CLK_ACLK400MCUISP_DIV]     = "div_aclk400mcuisp",
  64 };
  65
  66 static void fimc_is_put_clocks(struct fimc_is *is)
  67 {
  68         int i;
  69
  70         for (i = 0; i < ISS_CLKS_MAX; i++) {
  71                 if (IS_ERR(is->clocks[i]))
  72                         continue;
  73                 clk_put(is->clocks[i]);
  74                 is->clocks[i] = ERR_PTR(-EINVAL);
  75         }
  76 }
  77
  78 static int fimc_is_get_clocks(struct fimc_is *is)
  79 {
  80         int i, ret;
  81
  82         for (i = 0; i < ISS_CLKS_MAX; i++)
  83                 is->clocks[i] = ERR_PTR(-EINVAL);
  84
  85         for (i = 0; i < ISS_CLKS_MAX; i++) {
  86                 is->clocks[i] = clk_get(&is->pdev->dev, fimc_is_clocks[i]);
  87                 if (IS_ERR(is->clocks[i])) {
  88                         ret = PTR_ERR(is->clocks[i]);
  89                         goto err;
  90                 }
  91         }
  92
  93         return 0;
  94 err:
  95         fimc_is_put_clocks(is);
  96         dev_err(&is->pdev->dev, "failed to get clock: %s\n",
  97                 fimc_is_clocks[i]);
  98         return ret;
  99 }
 100
 101 static int fimc_is_setup_clocks(struct fimc_is *is)
 102 {
 103         int ret;
 104
 105         ret = clk_set_parent(is->clocks[ISS_CLK_ACLK200],
 106                                         is->clocks[ISS_CLK_ACLK200_DIV]);
 107         if (ret < 0)
 108                 return ret;
 109
 110         ret = clk_set_parent(is->clocks[ISS_CLK_ACLK400MCUISP],
 111                                         is->clocks[ISS_CLK_ACLK400MCUISP_DIV]);
 112         if (ret < 0)
 113                 return ret;
 114
 115         ret = clk_set_rate(is->clocks[ISS_CLK_ISP_DIV0], ACLK_AXI_FREQUENCY);
 116         if (ret < 0)
 117                 return ret;
 118
 119         ret = clk_set_rate(is->clocks[ISS_CLK_ISP_DIV1], ACLK_AXI_FREQUENCY);
 120         if (ret < 0)
 121                 return ret;
 122
 123         ret = clk_set_rate(is->clocks[ISS_CLK_MCUISP_DIV0],
 124                                         ATCLK_MCUISP_FREQUENCY);
 125         if (ret < 0)
 126                 return ret;
 127
 128         return clk_set_rate(is->clocks[ISS_CLK_MCUISP_DIV1],
 129                                         ATCLK_MCUISP_FREQUENCY);
 130 }
 131
 132 static int fimc_is_enable_clocks(struct fimc_is *is)
 133 {
 134         int i, ret;
 135
 136         for (i = 0; i < ISS_GATE_CLKS_MAX; i++) {
 137                 if (IS_ERR(is->clocks[i]))
 138                         continue;
 139                 ret = clk_prepare_enable(is->clocks[i]);
 140                 if (ret < 0) {
 141                         dev_err(&is->pdev->dev, "clock %s enable failed\n",
 142                                 fimc_is_clocks[i]);
 143                         for (--i; i >= 0; i--)
 144                                 clk_disable(is->clocks[i]);
 145                         return ret;
 146                 }
 147                 pr_debug("enabled clock: %s\n", fimc_is_clocks[i]);
 148         }
 149         return 0;
 150 }
 151
 152 static void fimc_is_disable_clocks(struct fimc_is *is)
 153 {
 154         int i;
 155
 156         for (i = 0; i < ISS_GATE_CLKS_MAX; i++) {
 157                 if (!IS_ERR(is->clocks[i])) {
 158                         clk_disable_unprepare(is->clocks[i]);
 159                         pr_debug("disabled clock: %s\n", fimc_is_clocks[i]);
 160                 }
 161         }
 162 }
 163
 164 static int fimc_is_parse_sensor_config(struct fimc_is *is, unsigned int index,
 165                                                 struct device_node *node)
 166 {
 167         struct fimc_is_sensor *sensor = &is->sensor[index];
 168         struct device_node *ep, *port;
 169         u32 tmp = 0;
 170         int ret;
 171
 172         sensor->drvdata = fimc_is_sensor_get_drvdata(node);
 173         if (!sensor->drvdata) {
 174                 dev_err(&is->pdev->dev, "no driver data found for: %pOF\n",
 175                                                          node);
 176                 return -EINVAL;
 177         }
 178
 179         ep = of_graph_get_next_endpoint(node, NULL);
 180         if (!ep)
 181                 return -ENXIO;
 182
 183         port = of_graph_get_remote_port(ep);
 184         of_node_put(ep);
 185         if (!port)
 186                 return -ENXIO;
 187
 188         /* Use MIPI-CSIS channel id to determine the ISP I2C bus index. */
 189         ret = of_property_read_u32(port, "reg", &tmp);
 190         if (ret < 0) {
 191                 dev_err(&is->pdev->dev, "reg property not found at: %pOF\n",
 192                                                          port);
 193                 of_node_put(port);
 194                 return ret;
 195         }
 196
 197         of_node_put(port);
 198         sensor->i2c_bus = tmp - FIMC_INPUT_MIPI_CSI2_0;
 199         return 0;
 200 }
 201
 202 static int fimc_is_register_subdevs(struct fimc_is *is)
 203 {
 204         struct device_node *i2c_bus, *child;
 205         int ret, index = 0;
 206
 207         ret = fimc_isp_subdev_create(&is->isp);
 208         if (ret < 0)
 209                 return ret;
 210
 211         for_each_compatible_node(i2c_bus, NULL, FIMC_IS_I2C_COMPATIBLE) {
 212                 for_each_available_child_of_node(i2c_bus, child) {
 213                         ret = fimc_is_parse_sensor_config(is, index, child);
 214
 215                         if (ret < 0 || index >= FIMC_IS_SENSORS_NUM) {
 216                                 of_node_put(child);
 217                                 return ret;
 218                         }
 219                         index++;
 220                 }
 221         }
 222         return 0;
 223 }
 224
 225 static int fimc_is_unregister_subdevs(struct fimc_is *is)
 226 {
 227         fimc_isp_subdev_destroy(&is->isp);
 228         return 0;
 229 }
 230
 231 static int fimc_is_load_setfile(struct fimc_is *is, char *file_name)
 232 {
 233         const struct firmware *fw;
 234         void *buf;
 235         int ret;
 236
 237         ret = request_firmware(&fw, file_name, &is->pdev->dev);
 238         if (ret < 0) {
 239                 dev_err(&is->pdev->dev, "firmware request failed (%d)\n", ret);
 240                 return ret;
 241         }
 242         buf = is->memory.vaddr + is->setfile.base;
 243         memcpy(buf, fw->data, fw->size);
 244         fimc_is_mem_barrier();
 245         is->setfile.size = fw->size;
 246
 247         pr_debug("mem vaddr: %p, setfile buf: %p\n", is->memory.vaddr, buf);
 248
 249         memcpy(is->fw.setfile_info,
 250                 fw->data + fw->size - FIMC_IS_SETFILE_INFO_LEN,
 251                 FIMC_IS_SETFILE_INFO_LEN - 1);
 252
 253         is->fw.setfile_info[FIMC_IS_SETFILE_INFO_LEN - 1] = '\0';
 254         is->setfile.state = 1;
 255
 256         pr_debug("FIMC-IS setfile loaded: base: %#x, size: %zu B\n",
 257                  is->setfile.base, fw->size);
 258
 259         release_firmware(fw);
 260         return ret;
 261 }
 262
 263 int fimc_is_cpu_set_power(struct fimc_is *is, int on)
 264 {
 265         unsigned int timeout = FIMC_IS_POWER_ON_TIMEOUT;
 266
 267         if (on) {
 268                 /* Disable watchdog */
 269                 mcuctl_write(0, is, REG_WDT_ISP);
 270
 271                 /* Cortex-A5 start address setting */
 272                 mcuctl_write(is->memory.paddr, is, MCUCTL_REG_BBOAR);
 273
 274                 /* Enable and start Cortex-A5 */
 275                 pmuisp_write(0x18000, is, REG_PMU_ISP_ARM_OPTION);
 276                 pmuisp_write(0x1, is, REG_PMU_ISP_ARM_CONFIGURATION);
 277         } else {
 278                 /* A5 power off */
 279                 pmuisp_write(0x10000, is, REG_PMU_ISP_ARM_OPTION);
 280                 pmuisp_write(0x0, is, REG_PMU_ISP_ARM_CONFIGURATION);
 281
 282                 while (pmuisp_read(is, REG_PMU_ISP_ARM_STATUS) & 1) {
 283                         if (timeout == 0)
 284                                 return -ETIME;
 285                         timeout--;
 286                         udelay(1);
 287                 }
 288         }
 289
 290         return 0;
 291 }
 292
 293 /* Wait until @bit of @is->state is set to @state in the interrupt handler. */
 294 int fimc_is_wait_event(struct fimc_is *is, unsigned long bit,
 295                        unsigned int state, unsigned int timeout)
 296 {
 297
 298         int ret = wait_event_timeout(is->irq_queue,
 299                                      !state ^ test_bit(bit, &is->state),
 300                                      timeout);
 301         if (ret == 0) {
 302                 dev_WARN(&is->pdev->dev, "%s() timed out\n", __func__);
 303                 return -ETIME;
 304         }
 305         return 0;
 306 }
 307
 308 int fimc_is_start_firmware(struct fimc_is *is)
 309 {
 310         struct device *dev = &is->pdev->dev;
 311         int ret;
 312
 313         if (is->fw.f_w == NULL) {
 314                 dev_err(dev, "firmware is not loaded\n");
 315                 return -EINVAL;
 316         }
 317
 318         memcpy(is->memory.vaddr, is->fw.f_w->data, is->fw.f_w->size);
 319         wmb();
 320
 321         ret = fimc_is_cpu_set_power(is, 1);
 322         if (ret < 0)
 323                 return ret;
 324
 325         ret = fimc_is_wait_event(is, IS_ST_A5_PWR_ON, 1,
 326                                  msecs_to_jiffies(FIMC_IS_FW_LOAD_TIMEOUT));
 327         if (ret < 0)
 328                 dev_err(dev, "FIMC-IS CPU power on failed\n");
 329
 330         return ret;
 331 }
 332
 333 /* Allocate working memory for the FIMC-IS CPU. */
 334 static int fimc_is_alloc_cpu_memory(struct fimc_is *is)
 335 {
 336         struct device *dev = &is->pdev->dev;
 337
 338         is->memory.vaddr = dma_alloc_coherent(dev, FIMC_IS_CPU_MEM_SIZE,
 339                                               &is->memory.paddr, GFP_KERNEL);
 340         if (is->memory.vaddr == NULL)
 341                 return -ENOMEM;
 342
 343         is->memory.size = FIMC_IS_CPU_MEM_SIZE;
 344
 345         dev_info(dev, "FIMC-IS CPU memory base: %#x\n", (u32)is->memory.paddr);
 346
 347         if (((u32)is->memory.paddr) & FIMC_IS_FW_ADDR_MASK) {
 348                 dev_err(dev, "invalid firmware memory alignment: %#x\n",
 349                         (u32)is->memory.paddr);
 350                 dma_free_coherent(dev, is->memory.size, is->memory.vaddr,
 351                                   is->memory.paddr);
 352                 return -EIO;
 353         }
 354
 355         is->is_p_region = (struct is_region *)(is->memory.vaddr +
 356                                 FIMC_IS_CPU_MEM_SIZE - FIMC_IS_REGION_SIZE);
 357
 358         is->is_dma_p_region = is->memory.paddr +
 359                                 FIMC_IS_CPU_MEM_SIZE - FIMC_IS_REGION_SIZE;
 360
 361         is->is_shared_region = (struct is_share_region *)(is->memory.vaddr +
 362                                 FIMC_IS_SHARED_REGION_OFFSET);
 363         return 0;
 364 }
 365
 366 static void fimc_is_free_cpu_memory(struct fimc_is *is)
 367 {
 368         struct device *dev = &is->pdev->dev;
 369
 370         if (is->memory.vaddr == NULL)
 371                 return;
 372
 373         dma_free_coherent(dev, is->memory.size, is->memory.vaddr,
 374                           is->memory.paddr);
 375 }
 376
 377 static void fimc_is_load_firmware(const struct firmware *fw, void *context)
 378 {
 379         struct fimc_is *is = context;
 380         struct device *dev = &is->pdev->dev;
 381         void *buf;
 382         int ret;
 383
 384         if (fw == NULL) {
 385                 dev_err(dev, "firmware request failed\n");
 386                 return;
 387         }
 388         mutex_lock(&is->lock);
 389
 390         if (fw->size < FIMC_IS_FW_SIZE_MIN || fw->size > FIMC_IS_FW_SIZE_MAX) {
 391                 dev_err(dev, "wrong firmware size: %zu\n", fw->size);
 392                 goto done;
 393         }
 394
 395         is->fw.size = fw->size;
 396
 397         ret = fimc_is_alloc_cpu_memory(is);
 398         if (ret < 0) {
 399                 dev_err(dev, "failed to allocate FIMC-IS CPU memory\n");
 400                 goto done;
 401         }
 402
 403         memcpy(is->memory.vaddr, fw->data, fw->size);
 404         wmb();
 405
 406         /* Read firmware description. */
 407         buf = (void *)(is->memory.vaddr + fw->size - FIMC_IS_FW_DESC_LEN);
 408         memcpy(&is->fw.info, buf, FIMC_IS_FW_INFO_LEN);
 409         is->fw.info[FIMC_IS_FW_INFO_LEN] = 0;
 410
 411         buf = (void *)(is->memory.vaddr + fw->size - FIMC_IS_FW_VER_LEN);
 412         memcpy(&is->fw.version, buf, FIMC_IS_FW_VER_LEN);
 413         is->fw.version[FIMC_IS_FW_VER_LEN - 1] = 0;
 414
 415         is->fw.state = 1;
 416
 417         dev_info(dev, "loaded firmware: %s, rev. %s\n",
 418                  is->fw.info, is->fw.version);
 419         dev_dbg(dev, "FW size: %zu, paddr: %pad\n", fw->size, &is->memory.paddr);
 420
 421         is->is_shared_region->chip_id = 0xe4412;
 422         is->is_shared_region->chip_rev_no = 1;
 423
 424         fimc_is_mem_barrier();
 425
 426         /*
 427          * FIXME: The firmware is not being released for now, as it is
 428          * needed around for copying to the IS working memory every
 429          * time before the Cortex-A5 is restarted.
 430          */
 431         release_firmware(is->fw.f_w);
 432         is->fw.f_w = fw;
 433 done:
 434         mutex_unlock(&is->lock);
 435 }
 436
 437 static int fimc_is_request_firmware(struct fimc_is *is, const char *fw_name)
 438 {
 439         return request_firmware_nowait(THIS_MODULE,
 440                                 FW_ACTION_HOTPLUG, fw_name, &is->pdev->dev,
 441                                 GFP_KERNEL, is, fimc_is_load_firmware);
 442 }
 443
 444 /* General IS interrupt handler */
 445 static void fimc_is_general_irq_handler(struct fimc_is *is)
 446 {
 447         is->i2h_cmd.cmd = mcuctl_read(is, MCUCTL_REG_ISSR(10));
 448
 449         switch (is->i2h_cmd.cmd) {
 450         case IHC_GET_SENSOR_NUM:
 451                 fimc_is_hw_get_params(is, 1);
 452                 fimc_is_hw_wait_intmsr0_intmsd0(is);
 453                 fimc_is_hw_set_sensor_num(is);
 454                 pr_debug("ISP FW version: %#x\n", is->i2h_cmd.args[0]);
 455                 break;
 456         case IHC_SET_FACE_MARK:
 457         case IHC_FRAME_DONE:
 458                 fimc_is_hw_get_params(is, 2);
 459                 break;
 460         case IHC_SET_SHOT_MARK:
 461         case IHC_AA_DONE:
 462         case IH_REPLY_DONE:
 463                 fimc_is_hw_get_params(is, 3);
 464                 break;
 465         case IH_REPLY_NOT_DONE:
 466                 fimc_is_hw_get_params(is, 4);
 467                 break;
 468         case IHC_NOT_READY:
 469                 break;
 470         default:
 471                 pr_info("unknown command: %#x\n", is->i2h_cmd.cmd);
 472         }
 473
 474         fimc_is_fw_clear_irq1(is, FIMC_IS_INT_GENERAL);
 475
 476         switch (is->i2h_cmd.cmd) {
 477         case IHC_GET_SENSOR_NUM:
 478                 fimc_is_hw_set_intgr0_gd0(is);
 479                 set_bit(IS_ST_A5_PWR_ON, &is->state);
 480                 break;
 481
 482         case IHC_SET_SHOT_MARK:
 483                 break;
 484
 485         case IHC_SET_FACE_MARK:
 486                 is->fd_header.count = is->i2h_cmd.args[0];
 487                 is->fd_header.index = is->i2h_cmd.args[1];
 488                 is->fd_header.offset = 0;
 489                 break;
 490
 491         case IHC_FRAME_DONE:
 492                 break;
 493
 494         case IHC_AA_DONE:
 495                 pr_debug("AA_DONE - %d, %d, %d\n", is->i2h_cmd.args[0],
 496                          is->i2h_cmd.args[1], is->i2h_cmd.args[2]);
 497                 break;
 498
 499         case IH_REPLY_DONE:
 500                 pr_debug("ISR_DONE: args[0]: %#x\n", is->i2h_cmd.args[0]);
 501
 502                 switch (is->i2h_cmd.args[0]) {
 503                 case HIC_PREVIEW_STILL...HIC_CAPTURE_VIDEO:
 504                         /* Get CAC margin */
 505                         set_bit(IS_ST_CHANGE_MODE, &is->state);
 506                         is->isp.cac_margin_x = is->i2h_cmd.args[1];
 507                         is->isp.cac_margin_y = is->i2h_cmd.args[2];
 508                         pr_debug("CAC margin (x,y): (%d,%d)\n",
 509                                  is->isp.cac_margin_x, is->isp.cac_margin_y);
 510                         break;
 511
 512                 case HIC_STREAM_ON:
 513                         clear_bit(IS_ST_STREAM_OFF, &is->state);
 514                         set_bit(IS_ST_STREAM_ON, &is->state);
 515                         break;
 516
 517                 case HIC_STREAM_OFF:
 518                         clear_bit(IS_ST_STREAM_ON, &is->state);
 519                         set_bit(IS_ST_STREAM_OFF, &is->state);
 520                         break;
 521
 522                 case HIC_SET_PARAMETER:
 523                         is->config[is->config_index].p_region_index[0] = 0;
 524                         is->config[is->config_index].p_region_index[1] = 0;
 525                         set_bit(IS_ST_BLOCK_CMD_CLEARED, &is->state);
 526                         pr_debug("HIC_SET_PARAMETER\n");
 527                         break;
 528
 529                 case HIC_GET_PARAMETER:
 530                         break;
 531
 532                 case HIC_SET_TUNE:
 533                         break;
 534
 535                 case HIC_GET_STATUS:
 536                         break;
 537
 538                 case HIC_OPEN_SENSOR:
 539                         set_bit(IS_ST_OPEN_SENSOR, &is->state);
 540                         pr_debug("data lanes: %d, settle line: %d\n",
 541                                  is->i2h_cmd.args[2], is->i2h_cmd.args[1]);
 542                         break;
 543
 544                 case HIC_CLOSE_SENSOR:
 545                         clear_bit(IS_ST_OPEN_SENSOR, &is->state);
 546                         is->sensor_index = 0;
 547                         break;
 548
 549                 case HIC_MSG_TEST:
 550                         pr_debug("config MSG level completed\n");
 551                         break;
 552
 553                 case HIC_POWER_DOWN:
 554                         clear_bit(IS_ST_PWR_SUBIP_ON, &is->state);
 555                         break;
 556
 557                 case HIC_GET_SET_FILE_ADDR:
 558                         is->setfile.base = is->i2h_cmd.args[1];
 559                         set_bit(IS_ST_SETFILE_LOADED, &is->state);
 560                         break;
 561
 562                 case HIC_LOAD_SET_FILE:
 563                         set_bit(IS_ST_SETFILE_LOADED, &is->state);
 564                         break;
 565                 }
 566                 break;
 567
 568         case IH_REPLY_NOT_DONE:
 569                 pr_err("ISR_NDONE: %d: %#x, %s\n", is->i2h_cmd.args[0],
 570                        is->i2h_cmd.args[1],
 571                        fimc_is_strerr(is->i2h_cmd.args[1]));
 572
 573                 if (is->i2h_cmd.args[1] & IS_ERROR_TIME_OUT_FLAG)
 574                         pr_err("IS_ERROR_TIME_OUT\n");
 575
 576                 switch (is->i2h_cmd.args[1]) {
 577                 case IS_ERROR_SET_PARAMETER:
 578                         fimc_is_mem_barrier();
 579                 }
 580
 581                 switch (is->i2h_cmd.args[0]) {
 582                 case HIC_SET_PARAMETER:
 583                         is->config[is->config_index].p_region_index[0] = 0;
 584                         is->config[is->config_index].p_region_index[1] = 0;
 585                         set_bit(IS_ST_BLOCK_CMD_CLEARED, &is->state);
 586                         break;
 587                 }
 588                 break;
 589
 590         case IHC_NOT_READY:
 591                 pr_err("IS control sequence error: Not Ready\n");
 592                 break;
 593         }
 594
 595         wake_up(&is->irq_queue);
 596 }
 597
 598 static irqreturn_t fimc_is_irq_handler(int irq, void *priv)
 599 {
 600         struct fimc_is *is = priv;
 601         unsigned long flags;
 602         u32 status;
 603
 604         spin_lock_irqsave(&is->slock, flags);
 605         status = mcuctl_read(is, MCUCTL_REG_INTSR1);
 606
 607         if (status & (1UL << FIMC_IS_INT_GENERAL))
 608                 fimc_is_general_irq_handler(is);
 609
 610         if (status & (1UL << FIMC_IS_INT_FRAME_DONE_ISP))
 611                 fimc_isp_irq_handler(is);
 612
 613         spin_unlock_irqrestore(&is->slock, flags);
 614         return IRQ_HANDLED;
 615 }
 616
 617 static int fimc_is_hw_open_sensor(struct fimc_is *is,
 618                                   struct fimc_is_sensor *sensor)
 619 {
 620         struct sensor_open_extended *soe = (void *)&is->is_p_region->shared;
 621
 622         fimc_is_hw_wait_intmsr0_intmsd0(is);
 623
 624         soe->self_calibration_mode = 1;
 625         soe->actuator_type = 0;
 626         soe->mipi_lane_num = 0;
 627         soe->mclk = 0;
 628         soe->mipi_speed = 0;
 629         soe->fast_open_sensor = 0;
 630         soe->i2c_sclk = 88000000;
 631
 632         fimc_is_mem_barrier();
 633
 634         /*
 635          * Some user space use cases hang up here without this
 636          * empirically chosen delay.
 637          */
 638         udelay(100);
 639
 640         mcuctl_write(HIC_OPEN_SENSOR, is, MCUCTL_REG_ISSR(0));
 641         mcuctl_write(is->sensor_index, is, MCUCTL_REG_ISSR(1));
 642         mcuctl_write(sensor->drvdata->id, is, MCUCTL_REG_ISSR(2));
 643         mcuctl_write(sensor->i2c_bus, is, MCUCTL_REG_ISSR(3));
 644         mcuctl_write(is->is_dma_p_region, is, MCUCTL_REG_ISSR(4));
 645
 646         fimc_is_hw_set_intgr0_gd0(is);
 647
 648         return fimc_is_wait_event(is, IS_ST_OPEN_SENSOR, 1,
 649                                   sensor->drvdata->open_timeout);
 650 }
 651
 652
 653 int fimc_is_hw_initialize(struct fimc_is *is)
 654 {
 655         static const int config_ids[] = {
 656                 IS_SC_PREVIEW_STILL, IS_SC_PREVIEW_VIDEO,
 657                 IS_SC_CAPTURE_STILL, IS_SC_CAPTURE_VIDEO
 658         };
 659         struct device *dev = &is->pdev->dev;
 660         u32 prev_id;
 661         int i, ret;
 662
 663         /* Sensor initialization. Only one sensor is currently supported. */
 664         ret = fimc_is_hw_open_sensor(is, &is->sensor[0]);
 665         if (ret < 0)
 666                 return ret;
 667
 668         /* Get the setfile address. */
 669         fimc_is_hw_get_setfile_addr(is);
 670
 671         ret = fimc_is_wait_event(is, IS_ST_SETFILE_LOADED, 1,
 672                                  FIMC_IS_CONFIG_TIMEOUT);
 673         if (ret < 0) {
 674                 dev_err(dev, "get setfile address timed out\n");
 675                 return ret;
 676         }
 677         pr_debug("setfile.base: %#x\n", is->setfile.base);
 678
 679         /* Load the setfile. */
 680         fimc_is_load_setfile(is, FIMC_IS_SETFILE_6A3);
 681         clear_bit(IS_ST_SETFILE_LOADED, &is->state);
 682         fimc_is_hw_load_setfile(is);
 683         ret = fimc_is_wait_event(is, IS_ST_SETFILE_LOADED, 1,
 684                                  FIMC_IS_CONFIG_TIMEOUT);
 685         if (ret < 0) {
 686                 dev_err(dev, "loading setfile timed out\n");
 687                 return ret;
 688         }
 689
 690         pr_debug("setfile: base: %#x, size: %d\n",
 691                  is->setfile.base, is->setfile.size);
 692         pr_info("FIMC-IS Setfile info: %s\n", is->fw.setfile_info);
 693
 694         /* Check magic number. */
 695         if (is->is_p_region->shared[MAX_SHARED_COUNT - 1] !=
 696             FIMC_IS_MAGIC_NUMBER) {
 697                 dev_err(dev, "magic number error!\n");
 698                 return -EIO;
 699         }
 700
 701         pr_debug("shared region: %pad, parameter region: %pad\n",
 702                  &is->memory.paddr + FIMC_IS_SHARED_REGION_OFFSET,
 703                  &is->is_dma_p_region);
 704
 705         is->setfile.sub_index = 0;
 706
 707         /* Stream off. */
 708         fimc_is_hw_stream_off(is);
 709         ret = fimc_is_wait_event(is, IS_ST_STREAM_OFF, 1,
 710                                  FIMC_IS_CONFIG_TIMEOUT);
 711         if (ret < 0) {
 712                 dev_err(dev, "stream off timeout\n");
 713                 return ret;
 714         }
 715
 716         /* Preserve previous mode. */
 717         prev_id = is->config_index;
 718
 719         /* Set initial parameter values. */
 720         for (i = 0; i < ARRAY_SIZE(config_ids); i++) {
 721                 is->config_index = config_ids[i];
 722                 fimc_is_set_initial_params(is);
 723                 ret = fimc_is_itf_s_param(is, true);
 724                 if (ret < 0) {
 725                         is->config_index = prev_id;
 726                         return ret;
 727                 }
 728         }
 729         is->config_index = prev_id;
 730
 731         set_bit(IS_ST_INIT_DONE, &is->state);
 732         dev_info(dev, "initialization sequence completed (%d)\n",
 733                                                 is->config_index);
 734         return 0;
 735 }
 736
 737 static int fimc_is_show(struct seq_file *s, void *data)
 738 {
 739         struct fimc_is *is = s->private;
 740         const u8 *buf = is->memory.vaddr + FIMC_IS_DEBUG_REGION_OFFSET;
 741
 742         if (is->memory.vaddr == NULL) {
 743                 dev_err(&is->pdev->dev, "firmware memory is not initialized\n");
 744                 return -EIO;
 745         }
 746
 747         seq_printf(s, "%s\n", buf);
 748         return 0;
 749 }
 750
 751 DEFINE_SHOW_ATTRIBUTE(fimc_is);
 752
 753 static void fimc_is_debugfs_remove(struct fimc_is *is)
 754 {
 755         debugfs_remove_recursive(is->debugfs_entry);
 756         is->debugfs_entry = NULL;
 757 }
 758
 759 static void fimc_is_debugfs_create(struct fimc_is *is)
 760 {
 761         is->debugfs_entry = debugfs_create_dir("fimc_is", NULL);
 762
 763         debugfs_create_file("fw_log", S_IRUGO, is->debugfs_entry, is,
 764                             &fimc_is_fops);
 765 }
 766
 767 static int fimc_is_runtime_resume(struct device *dev);
 768 static int fimc_is_runtime_suspend(struct device *dev);
 769
 770 static int fimc_is_probe(struct platform_device *pdev)
 771 {
 772         struct device *dev = &pdev->dev;
 773         struct fimc_is *is;
 774         struct resource res;
 775         struct device_node *node;
 776         int ret;
 777
 778         is = devm_kzalloc(&pdev->dev, sizeof(*is), GFP_KERNEL);
 779         if (!is)
 780                 return -ENOMEM;
 781
 782         is->pdev = pdev;
 783         is->isp.pdev = pdev;
 784
 785         init_waitqueue_head(&is->irq_queue);
 786         spin_lock_init(&is->slock);
 787         mutex_init(&is->lock);
 788
 789         ret = of_address_to_resource(dev->of_node, 0, &res);
 790         if (ret < 0)
 791                 return ret;
 792
 793         is->regs = devm_ioremap_resource(dev, &res);
 794         if (IS_ERR(is->regs))
 795                 return PTR_ERR(is->regs);
 796
 797         node = of_get_child_by_name(dev->of_node, "pmu");
 798         if (!node)
 799                 return -ENODEV;
 800
 801         is->pmu_regs = of_iomap(node, 0);
 802         of_node_put(node);
 803         if (!is->pmu_regs)
 804                 return -ENOMEM;
 805
 806         is->irq = irq_of_parse_and_map(dev->of_node, 0);
 807         if (!is->irq) {
 808                 dev_err(dev, "no irq found\n");
 809                 ret = -EINVAL;
 810                 goto err_iounmap;
 811         }
 812
 813         ret = fimc_is_get_clocks(is);
 814         if (ret < 0)
 815                 goto err_iounmap;
 816
 817         platform_set_drvdata(pdev, is);
 818
 819         ret = request_irq(is->irq, fimc_is_irq_handler, 0, dev_name(dev), is);
 820         if (ret < 0) {
 821                 dev_err(dev, "irq request failed\n");
 822                 goto err_clk;
 823         }
 824         pm_runtime_enable(dev);
 825
 826         if (!pm_runtime_enabled(dev)) {
 827                 ret = fimc_is_runtime_resume(dev);
 828                 if (ret < 0)
 829                         goto err_irq;
 830         }
 831
 832         ret = pm_runtime_get_sync(dev);
 833         if (ret < 0)
 834                 goto err_pm;
 835
 836         vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
 837
 838         ret = devm_of_platform_populate(dev);
 839         if (ret < 0)
 840                 goto err_pm;
 841
 842         /*
 843          * Register FIMC-IS V4L2 subdevs to this driver. The video nodes
 844          * will be created within the subdev's registered() callback.
 845          */
 846         ret = fimc_is_register_subdevs(is);
 847         if (ret < 0)
 848                 goto err_pm;
 849
 850         fimc_is_debugfs_create(is);
 851
 852         ret = fimc_is_request_firmware(is, FIMC_IS_FW_FILENAME);
 853         if (ret < 0)
 854                 goto err_dfs;
 855
 856         pm_runtime_put_sync(dev);
 857
 858         dev_dbg(dev, "FIMC-IS registered successfully\n");
 859         return 0;
 860
 861 err_dfs:
 862         fimc_is_debugfs_remove(is);
 863         fimc_is_unregister_subdevs(is);
 864 err_pm:
 865         pm_runtime_put_noidle(dev);
 866         if (!pm_runtime_enabled(dev))
 867                 fimc_is_runtime_suspend(dev);
 868 err_irq:
 869         free_irq(is->irq, is);
 870 err_clk:
 871         fimc_is_put_clocks(is);
 872 err_iounmap:
 873         iounmap(is->pmu_regs);
 874         return ret;
 875 }
 876
 877 static int fimc_is_runtime_resume(struct device *dev)
 878 {
 879         struct fimc_is *is = dev_get_drvdata(dev);
 880         int ret;
 881
 882         ret = fimc_is_setup_clocks(is);
 883         if (ret)
 884                 return ret;
 885
 886         return fimc_is_enable_clocks(is);
 887 }
 888
 889 static int fimc_is_runtime_suspend(struct device *dev)
 890 {
 891         struct fimc_is *is = dev_get_drvdata(dev);
 892
 893         fimc_is_disable_clocks(is);
 894         return 0;
 895 }
 896
 897 #ifdef CONFIG_PM_SLEEP
 898 static int fimc_is_resume(struct device *dev)
 899 {
 900         /* TODO: */
 901         return 0;
 902 }
 903
 904 static int fimc_is_suspend(struct device *dev)
 905 {
 906         struct fimc_is *is = dev_get_drvdata(dev);
 907
 908         /* TODO: */
 909         if (test_bit(IS_ST_A5_PWR_ON, &is->state))
 910                 return -EBUSY;
 911
 912         return 0;
 913 }
 914 #endif /* CONFIG_PM_SLEEP */
 915
 916 static int fimc_is_remove(struct platform_device *pdev)
 917 {
 918         struct device *dev = &pdev->dev;
 919         struct fimc_is *is = dev_get_drvdata(dev);
 920
 921         pm_runtime_disable(dev);
 922         pm_runtime_set_suspended(dev);
 923         if (!pm_runtime_status_suspended(dev))
 924                 fimc_is_runtime_suspend(dev);
 925         free_irq(is->irq, is);
 926         fimc_is_unregister_subdevs(is);
 927         vb2_dma_contig_clear_max_seg_size(dev);
 928         fimc_is_put_clocks(is);
 929         iounmap(is->pmu_regs);
 930         fimc_is_debugfs_remove(is);
 931         release_firmware(is->fw.f_w);
 932         fimc_is_free_cpu_memory(is);
 933
 934         return 0;
 935 }
 936
 937 static const struct of_device_id fimc_is_of_match[] = {
 938         { .compatible = "samsung,exynos4212-fimc-is" },
 939         { /* sentinel */ },
 940 };
 941 MODULE_DEVICE_TABLE(of, fimc_is_of_match);
 942
 943 static const struct dev_pm_ops fimc_is_pm_ops = {
 944         SET_SYSTEM_SLEEP_PM_OPS(fimc_is_suspend, fimc_is_resume)
 945         SET_RUNTIME_PM_OPS(fimc_is_runtime_suspend, fimc_is_runtime_resume,
 946                            NULL)
 947 };
 948
 949 static struct platform_driver fimc_is_driver = {
 950         .probe          = fimc_is_probe,
 951         .remove         = fimc_is_remove,
 952         .driver = {
 953                 .of_match_table = fimc_is_of_match,
 954                 .name           = FIMC_IS_DRV_NAME,
 955                 .pm             = &fimc_is_pm_ops,
 956         }
 957 };
 958
 959 static int fimc_is_module_init(void)
 960 {
 961         int ret;
 962
 963         ret = fimc_is_register_i2c_driver();
 964         if (ret < 0)
 965                 return ret;
 966
 967         ret = platform_driver_register(&fimc_is_driver);
 968
 969         if (ret < 0)
 970                 fimc_is_unregister_i2c_driver();
 971
 972         return ret;
 973 }
 974
 975 static void fimc_is_module_exit(void)
 976 {
 977         fimc_is_unregister_i2c_driver();
 978         platform_driver_unregister(&fimc_is_driver);
 979 }
 980
 981 module_init(fimc_is_module_init);
 982 module_exit(fimc_is_module_exit);
 983
 984 MODULE_ALIAS("platform:" FIMC_IS_DRV_NAME);
 985 MODULE_AUTHOR("Younghwan Joo <yhwan.joo@samsung.com>");
 986 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
 987 MODULE_LICENSE("GPL v2");