drivers/media/platform/omap3isp/isph3a_aewb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * isph3a.c
   4  *
   5  * TI OMAP3 ISP - H3A module
   6  *
   7  * Copyright (C) 2010 Nokia Corporation
   8  * Copyright (C) 2009 Texas Instruments, Inc.
   9  *
  10  * Contacts: David Cohen <dacohen@gmail.com>
  11  *           Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  12  *           Sakari Ailus <sakari.ailus@iki.fi>
  13  */
  14
  15 #include <linux/slab.h>
  16 #include <linux/uaccess.h>
  17
  18 #include "isp.h"
  19 #include "isph3a.h"
  20 #include "ispstat.h"
  21
  22 /*
  23  * h3a_aewb_update_regs - Helper function to update h3a registers.
  24  */
  25 static void h3a_aewb_setup_regs(struct ispstat *aewb, void *priv)
  26 {
  27         struct omap3isp_h3a_aewb_config *conf = priv;
  28         u32 pcr;
  29         u32 win1;
  30         u32 start;
  31         u32 blk;
  32         u32 subwin;
  33
  34         if (aewb->state == ISPSTAT_DISABLED)
  35                 return;
  36
  37         isp_reg_writel(aewb->isp, aewb->active_buf->dma_addr,
  38                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWBUFST);
  39
  40         if (!aewb->update)
  41                 return;
  42
  43         /* Converting config metadata into reg values */
  44         pcr = conf->saturation_limit << ISPH3A_PCR_AEW_AVE2LMT_SHIFT;
  45         pcr |= !!conf->alaw_enable << ISPH3A_PCR_AEW_ALAW_EN_SHIFT;
  46
  47         win1 = ((conf->win_height >> 1) - 1) << ISPH3A_AEWWIN1_WINH_SHIFT;
  48         win1 |= ((conf->win_width >> 1) - 1) << ISPH3A_AEWWIN1_WINW_SHIFT;
  49         win1 |= (conf->ver_win_count - 1) << ISPH3A_AEWWIN1_WINVC_SHIFT;
  50         win1 |= (conf->hor_win_count - 1) << ISPH3A_AEWWIN1_WINHC_SHIFT;
  51
  52         start = conf->hor_win_start << ISPH3A_AEWINSTART_WINSH_SHIFT;
  53         start |= conf->ver_win_start << ISPH3A_AEWINSTART_WINSV_SHIFT;
  54
  55         blk = conf->blk_ver_win_start << ISPH3A_AEWINBLK_WINSV_SHIFT;
  56         blk |= ((conf->blk_win_height >> 1) - 1) << ISPH3A_AEWINBLK_WINH_SHIFT;
  57
  58         subwin = ((conf->subsample_ver_inc >> 1) - 1) <<
  59                  ISPH3A_AEWSUBWIN_AEWINCV_SHIFT;
  60         subwin |= ((conf->subsample_hor_inc >> 1) - 1) <<
  61                   ISPH3A_AEWSUBWIN_AEWINCH_SHIFT;
  62
  63         isp_reg_writel(aewb->isp, win1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWWIN1);
  64         isp_reg_writel(aewb->isp, start, OMAP3_ISP_IOMEM_H3A,
  65                        ISPH3A_AEWINSTART);
  66         isp_reg_writel(aewb->isp, blk, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWINBLK);
  67         isp_reg_writel(aewb->isp, subwin, OMAP3_ISP_IOMEM_H3A,
  68                        ISPH3A_AEWSUBWIN);
  69         isp_reg_clr_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
  70                         ISPH3A_PCR_AEW_MASK, pcr);
  71
  72         aewb->update = 0;
  73         aewb->config_counter += aewb->inc_config;
  74         aewb->inc_config = 0;
  75         aewb->buf_size = conf->buf_size;
  76 }
  77
  78 static void h3a_aewb_enable(struct ispstat *aewb, int enable)
  79 {
  80         if (enable) {
  81                 isp_reg_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
  82                             ISPH3A_PCR_AEW_EN);
  83                 omap3isp_subclk_enable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
  84         } else {
  85                 isp_reg_clr(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
  86                             ISPH3A_PCR_AEW_EN);
  87                 omap3isp_subclk_disable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
  88         }
  89 }
  90
  91 static int h3a_aewb_busy(struct ispstat *aewb)
  92 {
  93         return isp_reg_readl(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
  94                                                 & ISPH3A_PCR_BUSYAEAWB;
  95 }
  96
  97 static u32 h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config *conf)
  98 {
  99         /* Number of configured windows + extra row for black data */
 100         u32 win_count = (conf->ver_win_count + 1) * conf->hor_win_count;
 101
 102         /*
 103          * Unsaturated block counts for each 8 windows.
 104          * 1 extra for the last (win_count % 8) windows if win_count is not
 105          * divisible by 8.
 106          */
 107         win_count += (win_count + 7) / 8;
 108
 109         return win_count * AEWB_PACKET_SIZE;
 110 }
 111
 112 static int h3a_aewb_validate_params(struct ispstat *aewb, void *new_conf)
 113 {
 114         struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
 115         u32 buf_size;
 116
 117         if (unlikely(user_cfg->saturation_limit >
 118                      OMAP3ISP_AEWB_MAX_SATURATION_LIM))
 119                 return -EINVAL;
 120
 121         if (unlikely(user_cfg->win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
 122                      user_cfg->win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
 123                      user_cfg->win_height & 0x01))
 124                 return -EINVAL;
 125
 126         if (unlikely(user_cfg->win_width < OMAP3ISP_AEWB_MIN_WIN_W ||
 127                      user_cfg->win_width > OMAP3ISP_AEWB_MAX_WIN_W ||
 128                      user_cfg->win_width & 0x01))
 129                 return -EINVAL;
 130
 131         if (unlikely(user_cfg->ver_win_count < OMAP3ISP_AEWB_MIN_WINVC ||
 132                      user_cfg->ver_win_count > OMAP3ISP_AEWB_MAX_WINVC))
 133                 return -EINVAL;
 134
 135         if (unlikely(user_cfg->hor_win_count < OMAP3ISP_AEWB_MIN_WINHC ||
 136                      user_cfg->hor_win_count > OMAP3ISP_AEWB_MAX_WINHC))
 137                 return -EINVAL;
 138
 139         if (unlikely(user_cfg->ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 140                 return -EINVAL;
 141
 142         if (unlikely(user_cfg->hor_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 143                 return -EINVAL;
 144
 145         if (unlikely(user_cfg->blk_ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 146                 return -EINVAL;
 147
 148         if (unlikely(user_cfg->blk_win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
 149                      user_cfg->blk_win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
 150                      user_cfg->blk_win_height & 0x01))
 151                 return -EINVAL;
 152
 153         if (unlikely(user_cfg->subsample_ver_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
 154                      user_cfg->subsample_ver_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
 155                      user_cfg->subsample_ver_inc & 0x01))
 156                 return -EINVAL;
 157
 158         if (unlikely(user_cfg->subsample_hor_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
 159                      user_cfg->subsample_hor_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
 160                      user_cfg->subsample_hor_inc & 0x01))
 161                 return -EINVAL;
 162
 163         buf_size = h3a_aewb_get_buf_size(user_cfg);
 164         if (buf_size > user_cfg->buf_size)
 165                 user_cfg->buf_size = buf_size;
 166         else if (user_cfg->buf_size > OMAP3ISP_AEWB_MAX_BUF_SIZE)
 167                 user_cfg->buf_size = OMAP3ISP_AEWB_MAX_BUF_SIZE;
 168
 169         return 0;
 170 }
 171
 172 /*
 173  * h3a_aewb_set_params - Helper function to check & store user given params.
 174  * @new_conf: Pointer to AE and AWB parameters struct.
 175  *
 176  * As most of them are busy-lock registers, need to wait until AEW_BUSY = 0 to
 177  * program them during ISR.
 178  */
 179 static void h3a_aewb_set_params(struct ispstat *aewb, void *new_conf)
 180 {
 181         struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
 182         struct omap3isp_h3a_aewb_config *cur_cfg = aewb->priv;
 183         int update = 0;
 184
 185         if (cur_cfg->saturation_limit != user_cfg->saturation_limit) {
 186                 cur_cfg->saturation_limit = user_cfg->saturation_limit;
 187                 update = 1;
 188         }
 189         if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
 190                 cur_cfg->alaw_enable = user_cfg->alaw_enable;
 191                 update = 1;
 192         }
 193         if (cur_cfg->win_height != user_cfg->win_height) {
 194                 cur_cfg->win_height = user_cfg->win_height;
 195                 update = 1;
 196         }
 197         if (cur_cfg->win_width != user_cfg->win_width) {
 198                 cur_cfg->win_width = user_cfg->win_width;
 199                 update = 1;
 200         }
 201         if (cur_cfg->ver_win_count != user_cfg->ver_win_count) {
 202                 cur_cfg->ver_win_count = user_cfg->ver_win_count;
 203                 update = 1;
 204         }
 205         if (cur_cfg->hor_win_count != user_cfg->hor_win_count) {
 206                 cur_cfg->hor_win_count = user_cfg->hor_win_count;
 207                 update = 1;
 208         }
 209         if (cur_cfg->ver_win_start != user_cfg->ver_win_start) {
 210                 cur_cfg->ver_win_start = user_cfg->ver_win_start;
 211                 update = 1;
 212         }
 213         if (cur_cfg->hor_win_start != user_cfg->hor_win_start) {
 214                 cur_cfg->hor_win_start = user_cfg->hor_win_start;
 215                 update = 1;
 216         }
 217         if (cur_cfg->blk_ver_win_start != user_cfg->blk_ver_win_start) {
 218                 cur_cfg->blk_ver_win_start = user_cfg->blk_ver_win_start;
 219                 update = 1;
 220         }
 221         if (cur_cfg->blk_win_height != user_cfg->blk_win_height) {
 222                 cur_cfg->blk_win_height = user_cfg->blk_win_height;
 223                 update = 1;
 224         }
 225         if (cur_cfg->subsample_ver_inc != user_cfg->subsample_ver_inc) {
 226                 cur_cfg->subsample_ver_inc = user_cfg->subsample_ver_inc;
 227                 update = 1;
 228         }
 229         if (cur_cfg->subsample_hor_inc != user_cfg->subsample_hor_inc) {
 230                 cur_cfg->subsample_hor_inc = user_cfg->subsample_hor_inc;
 231                 update = 1;
 232         }
 233
 234         if (update || !aewb->configured) {
 235                 aewb->inc_config++;
 236                 aewb->update = 1;
 237                 cur_cfg->buf_size = h3a_aewb_get_buf_size(cur_cfg);
 238         }
 239 }
 240
 241 static long h3a_aewb_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
 242 {
 243         struct ispstat *stat = v4l2_get_subdevdata(sd);
 244
 245         switch (cmd) {
 246         case VIDIOC_OMAP3ISP_AEWB_CFG:
 247                 return omap3isp_stat_config(stat, arg);
 248         case VIDIOC_OMAP3ISP_STAT_REQ:
 249                 return omap3isp_stat_request_statistics(stat, arg);
 250         case VIDIOC_OMAP3ISP_STAT_REQ_TIME32:
 251                 return omap3isp_stat_request_statistics_time32(stat, arg);
 252         case VIDIOC_OMAP3ISP_STAT_EN: {
 253                 unsigned long *en = arg;
 254                 return omap3isp_stat_enable(stat, !!*en);
 255         }
 256         }
 257
 258         return -ENOIOCTLCMD;
 259 }
 260
 261 static const struct ispstat_ops h3a_aewb_ops = {
 262         .validate_params        = h3a_aewb_validate_params,
 263         .set_params             = h3a_aewb_set_params,
 264         .setup_regs             = h3a_aewb_setup_regs,
 265         .enable                 = h3a_aewb_enable,
 266         .busy                   = h3a_aewb_busy,
 267 };
 268
 269 static const struct v4l2_subdev_core_ops h3a_aewb_subdev_core_ops = {
 270         .ioctl = h3a_aewb_ioctl,
 271         .subscribe_event = omap3isp_stat_subscribe_event,
 272         .unsubscribe_event = omap3isp_stat_unsubscribe_event,
 273 };
 274
 275 static const struct v4l2_subdev_video_ops h3a_aewb_subdev_video_ops = {
 276         .s_stream = omap3isp_stat_s_stream,
 277 };
 278
 279 static const struct v4l2_subdev_ops h3a_aewb_subdev_ops = {
 280         .core = &h3a_aewb_subdev_core_ops,
 281         .video = &h3a_aewb_subdev_video_ops,
 282 };
 283
 284 /*
 285  * omap3isp_h3a_aewb_init - Module Initialisation.
 286  */
 287 int omap3isp_h3a_aewb_init(struct isp_device *isp)
 288 {
 289         struct ispstat *aewb = &isp->isp_aewb;
 290         struct omap3isp_h3a_aewb_config *aewb_cfg;
 291         struct omap3isp_h3a_aewb_config *aewb_recover_cfg = NULL;
 292         int ret;
 293
 294         aewb_cfg = kzalloc(sizeof(*aewb_cfg), GFP_KERNEL);
 295         if (!aewb_cfg)
 296                 return -ENOMEM;
 297
 298         aewb->ops = &h3a_aewb_ops;
 299         aewb->priv = aewb_cfg;
 300         aewb->event_type = V4L2_EVENT_OMAP3ISP_AEWB;
 301         aewb->isp = isp;
 302
 303         /* Set recover state configuration */
 304         aewb_recover_cfg = kzalloc(sizeof(*aewb_recover_cfg), GFP_KERNEL);
 305         if (!aewb_recover_cfg) {
 306                 dev_err(aewb->isp->dev,
 307                         "AEWB: cannot allocate memory for recover configuration.\n");
 308                 ret = -ENOMEM;
 309                 goto err;
 310         }
 311
 312         aewb_recover_cfg->saturation_limit = OMAP3ISP_AEWB_MAX_SATURATION_LIM;
 313         aewb_recover_cfg->win_height = OMAP3ISP_AEWB_MIN_WIN_H;
 314         aewb_recover_cfg->win_width = OMAP3ISP_AEWB_MIN_WIN_W;
 315         aewb_recover_cfg->ver_win_count = OMAP3ISP_AEWB_MIN_WINVC;
 316         aewb_recover_cfg->hor_win_count = OMAP3ISP_AEWB_MIN_WINHC;
 317         aewb_recover_cfg->blk_ver_win_start = aewb_recover_cfg->ver_win_start +
 318                 aewb_recover_cfg->win_height * aewb_recover_cfg->ver_win_count;
 319         aewb_recover_cfg->blk_win_height = OMAP3ISP_AEWB_MIN_WIN_H;
 320         aewb_recover_cfg->subsample_ver_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
 321         aewb_recover_cfg->subsample_hor_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
 322
 323         if (h3a_aewb_validate_params(aewb, aewb_recover_cfg)) {
 324                 dev_err(aewb->isp->dev,
 325                         "AEWB: recover configuration is invalid.\n");
 326                 ret = -EINVAL;
 327                 goto err;
 328         }
 329
 330         aewb_recover_cfg->buf_size = h3a_aewb_get_buf_size(aewb_recover_cfg);
 331         aewb->recover_priv = aewb_recover_cfg;
 332
 333         ret = omap3isp_stat_init(aewb, "AEWB", &h3a_aewb_subdev_ops);
 334
 335 err:
 336         if (ret) {
 337                 kfree(aewb_cfg);
 338                 kfree(aewb_recover_cfg);
 339         }
 340
 341         return ret;
 342 }
 343
 344 /*
 345  * omap3isp_h3a_aewb_cleanup - Module exit.
 346  */
 347 void omap3isp_h3a_aewb_cleanup(struct isp_device *isp)
 348 {
 349         omap3isp_stat_cleanup(&isp->isp_aewb);
 350 }