drivers/media/video/omap3isp/isph3a_aewb.c

   1 /*
   2  * isph3a.c
   3  *
   4  * TI OMAP3 ISP - H3A module
   5  *
   6  * Copyright (C) 2010 Nokia Corporation
   7  * Copyright (C) 2009 Texas Instruments, Inc.
   8  *
   9  * Contacts: David Cohen <dacohen@gmail.com>
  10  *           Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  11  *           Sakari Ailus <sakari.ailus@iki.fi>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  25  * 02110-1301 USA
  26  */
  27
  28 #include <linux/slab.h>
  29 #include <linux/uaccess.h>
  30
  31 #include "isp.h"
  32 #include "isph3a.h"
  33 #include "ispstat.h"
  34
  35 /*
  36  * h3a_aewb_update_regs - Helper function to update h3a registers.
  37  */
  38 static void h3a_aewb_setup_regs(struct ispstat *aewb, void *priv)
  39 {
  40         struct omap3isp_h3a_aewb_config *conf = priv;
  41         u32 pcr;
  42         u32 win1;
  43         u32 start;
  44         u32 blk;
  45         u32 subwin;
  46
  47         if (aewb->state == ISPSTAT_DISABLED)
  48                 return;
  49
  50         isp_reg_writel(aewb->isp, aewb->active_buf->iommu_addr,
  51                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWBUFST);
  52
  53         if (!aewb->update)
  54                 return;
  55
  56         /* Converting config metadata into reg values */
  57         pcr = conf->saturation_limit << ISPH3A_PCR_AEW_AVE2LMT_SHIFT;
  58         pcr |= !!conf->alaw_enable << ISPH3A_PCR_AEW_ALAW_EN_SHIFT;
  59
  60         win1 = ((conf->win_height >> 1) - 1) << ISPH3A_AEWWIN1_WINH_SHIFT;
  61         win1 |= ((conf->win_width >> 1) - 1) << ISPH3A_AEWWIN1_WINW_SHIFT;
  62         win1 |= (conf->ver_win_count - 1) << ISPH3A_AEWWIN1_WINVC_SHIFT;
  63         win1 |= (conf->hor_win_count - 1) << ISPH3A_AEWWIN1_WINHC_SHIFT;
  64
  65         start = conf->hor_win_start << ISPH3A_AEWINSTART_WINSH_SHIFT;
  66         start |= conf->ver_win_start << ISPH3A_AEWINSTART_WINSV_SHIFT;
  67
  68         blk = conf->blk_ver_win_start << ISPH3A_AEWINBLK_WINSV_SHIFT;
  69         blk |= ((conf->blk_win_height >> 1) - 1) << ISPH3A_AEWINBLK_WINH_SHIFT;
  70
  71         subwin = ((conf->subsample_ver_inc >> 1) - 1) <<
  72                  ISPH3A_AEWSUBWIN_AEWINCV_SHIFT;
  73         subwin |= ((conf->subsample_hor_inc >> 1) - 1) <<
  74                   ISPH3A_AEWSUBWIN_AEWINCH_SHIFT;
  75
  76         isp_reg_writel(aewb->isp, win1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWWIN1);
  77         isp_reg_writel(aewb->isp, start, OMAP3_ISP_IOMEM_H3A,
  78                        ISPH3A_AEWINSTART);
  79         isp_reg_writel(aewb->isp, blk, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWINBLK);
  80         isp_reg_writel(aewb->isp, subwin, OMAP3_ISP_IOMEM_H3A,
  81                        ISPH3A_AEWSUBWIN);
  82         isp_reg_clr_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
  83                         ISPH3A_PCR_AEW_MASK, pcr);
  84
  85         aewb->update = 0;
  86         aewb->config_counter += aewb->inc_config;
  87         aewb->inc_config = 0;
  88         aewb->buf_size = conf->buf_size;
  89 }
  90
  91 static void h3a_aewb_enable(struct ispstat *aewb, int enable)
  92 {
  93         if (enable) {
  94                 isp_reg_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
  95                             ISPH3A_PCR_AEW_EN);
  96                 /* This bit is already set if AF is enabled */
  97                 if (aewb->isp->isp_af.state != ISPSTAT_ENABLED)
  98                         isp_reg_set(aewb->isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
  99                                     ISPCTRL_H3A_CLK_EN);
 100         } else {
 101                 isp_reg_clr(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
 102                             ISPH3A_PCR_AEW_EN);
 103                 /* This bit can't be cleared if AF is enabled */
 104                 if (aewb->isp->isp_af.state != ISPSTAT_ENABLED)
 105                         isp_reg_clr(aewb->isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
 106                                     ISPCTRL_H3A_CLK_EN);
 107         }
 108 }
 109
 110 static int h3a_aewb_busy(struct ispstat *aewb)
 111 {
 112         return isp_reg_readl(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
 113                                                 & ISPH3A_PCR_BUSYAEAWB;
 114 }
 115
 116 static u32 h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config *conf)
 117 {
 118         /* Number of configured windows + extra row for black data */
 119         u32 win_count = (conf->ver_win_count + 1) * conf->hor_win_count;
 120
 121         /*
 122          * Unsaturated block counts for each 8 windows.
 123          * 1 extra for the last (win_count % 8) windows if win_count is not
 124          * divisible by 8.
 125          */
 126         win_count += (win_count + 7) / 8;
 127
 128         return win_count * AEWB_PACKET_SIZE;
 129 }
 130
 131 static int h3a_aewb_validate_params(struct ispstat *aewb, void *new_conf)
 132 {
 133         struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
 134         u32 buf_size;
 135
 136         if (unlikely(user_cfg->saturation_limit >
 137                      OMAP3ISP_AEWB_MAX_SATURATION_LIM))
 138                 return -EINVAL;
 139
 140         if (unlikely(user_cfg->win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
 141                      user_cfg->win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
 142                      user_cfg->win_height & 0x01))
 143                 return -EINVAL;
 144
 145         if (unlikely(user_cfg->win_width < OMAP3ISP_AEWB_MIN_WIN_W ||
 146                      user_cfg->win_width > OMAP3ISP_AEWB_MAX_WIN_W ||
 147                      user_cfg->win_width & 0x01))
 148                 return -EINVAL;
 149
 150         if (unlikely(user_cfg->ver_win_count < OMAP3ISP_AEWB_MIN_WINVC ||
 151                      user_cfg->ver_win_count > OMAP3ISP_AEWB_MAX_WINVC))
 152                 return -EINVAL;
 153
 154         if (unlikely(user_cfg->hor_win_count < OMAP3ISP_AEWB_MIN_WINHC ||
 155                      user_cfg->hor_win_count > OMAP3ISP_AEWB_MAX_WINHC))
 156                 return -EINVAL;
 157
 158         if (unlikely(user_cfg->ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 159                 return -EINVAL;
 160
 161         if (unlikely(user_cfg->hor_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 162                 return -EINVAL;
 163
 164         if (unlikely(user_cfg->blk_ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 165                 return -EINVAL;
 166
 167         if (unlikely(user_cfg->blk_win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
 168                      user_cfg->blk_win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
 169                      user_cfg->blk_win_height & 0x01))
 170                 return -EINVAL;
 171
 172         if (unlikely(user_cfg->subsample_ver_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
 173                      user_cfg->subsample_ver_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
 174                      user_cfg->subsample_ver_inc & 0x01))
 175                 return -EINVAL;
 176
 177         if (unlikely(user_cfg->subsample_hor_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
 178                      user_cfg->subsample_hor_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
 179                      user_cfg->subsample_hor_inc & 0x01))
 180                 return -EINVAL;
 181
 182         buf_size = h3a_aewb_get_buf_size(user_cfg);
 183         if (buf_size > user_cfg->buf_size)
 184                 user_cfg->buf_size = buf_size;
 185         else if (user_cfg->buf_size > OMAP3ISP_AEWB_MAX_BUF_SIZE)
 186                 user_cfg->buf_size = OMAP3ISP_AEWB_MAX_BUF_SIZE;
 187
 188         return 0;
 189 }
 190
 191 /*
 192  * h3a_aewb_set_params - Helper function to check & store user given params.
 193  * @new_conf: Pointer to AE and AWB parameters struct.
 194  *
 195  * As most of them are busy-lock registers, need to wait until AEW_BUSY = 0 to
 196  * program them during ISR.
 197  */
 198 static void h3a_aewb_set_params(struct ispstat *aewb, void *new_conf)
 199 {
 200         struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
 201         struct omap3isp_h3a_aewb_config *cur_cfg = aewb->priv;
 202         int update = 0;
 203
 204         if (cur_cfg->saturation_limit != user_cfg->saturation_limit) {
 205                 cur_cfg->saturation_limit = user_cfg->saturation_limit;
 206                 update = 1;
 207         }
 208         if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
 209                 cur_cfg->alaw_enable = user_cfg->alaw_enable;
 210                 update = 1;
 211         }
 212         if (cur_cfg->win_height != user_cfg->win_height) {
 213                 cur_cfg->win_height = user_cfg->win_height;
 214                 update = 1;
 215         }
 216         if (cur_cfg->win_width != user_cfg->win_width) {
 217                 cur_cfg->win_width = user_cfg->win_width;
 218                 update = 1;
 219         }
 220         if (cur_cfg->ver_win_count != user_cfg->ver_win_count) {
 221                 cur_cfg->ver_win_count = user_cfg->ver_win_count;
 222                 update = 1;
 223         }
 224         if (cur_cfg->hor_win_count != user_cfg->hor_win_count) {
 225                 cur_cfg->hor_win_count = user_cfg->hor_win_count;
 226                 update = 1;
 227         }
 228         if (cur_cfg->ver_win_start != user_cfg->ver_win_start) {
 229                 cur_cfg->ver_win_start = user_cfg->ver_win_start;
 230                 update = 1;
 231         }
 232         if (cur_cfg->hor_win_start != user_cfg->hor_win_start) {
 233                 cur_cfg->hor_win_start = user_cfg->hor_win_start;
 234                 update = 1;
 235         }
 236         if (cur_cfg->blk_ver_win_start != user_cfg->blk_ver_win_start) {
 237                 cur_cfg->blk_ver_win_start = user_cfg->blk_ver_win_start;
 238                 update = 1;
 239         }
 240         if (cur_cfg->blk_win_height != user_cfg->blk_win_height) {
 241                 cur_cfg->blk_win_height = user_cfg->blk_win_height;
 242                 update = 1;
 243         }
 244         if (cur_cfg->subsample_ver_inc != user_cfg->subsample_ver_inc) {
 245                 cur_cfg->subsample_ver_inc = user_cfg->subsample_ver_inc;
 246                 update = 1;
 247         }
 248         if (cur_cfg->subsample_hor_inc != user_cfg->subsample_hor_inc) {
 249                 cur_cfg->subsample_hor_inc = user_cfg->subsample_hor_inc;
 250                 update = 1;
 251         }
 252
 253         if (update || !aewb->configured) {
 254                 aewb->inc_config++;
 255                 aewb->update = 1;
 256                 cur_cfg->buf_size = h3a_aewb_get_buf_size(cur_cfg);
 257         }
 258 }
 259
 260 static long h3a_aewb_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
 261 {
 262         struct ispstat *stat = v4l2_get_subdevdata(sd);
 263
 264         switch (cmd) {
 265         case VIDIOC_OMAP3ISP_AEWB_CFG:
 266                 return omap3isp_stat_config(stat, arg);
 267         case VIDIOC_OMAP3ISP_STAT_REQ:
 268                 return omap3isp_stat_request_statistics(stat, arg);
 269         case VIDIOC_OMAP3ISP_STAT_EN: {
 270                 unsigned long *en = arg;
 271                 return omap3isp_stat_enable(stat, !!*en);
 272         }
 273         }
 274
 275         return -ENOIOCTLCMD;
 276 }
 277
 278 static const struct ispstat_ops h3a_aewb_ops = {
 279         .validate_params        = h3a_aewb_validate_params,
 280         .set_params             = h3a_aewb_set_params,
 281         .setup_regs             = h3a_aewb_setup_regs,
 282         .enable                 = h3a_aewb_enable,
 283         .busy                   = h3a_aewb_busy,
 284 };
 285
 286 static const struct v4l2_subdev_core_ops h3a_aewb_subdev_core_ops = {
 287         .ioctl = h3a_aewb_ioctl,
 288         .subscribe_event = omap3isp_stat_subscribe_event,
 289         .unsubscribe_event = omap3isp_stat_unsubscribe_event,
 290 };
 291
 292 static const struct v4l2_subdev_video_ops h3a_aewb_subdev_video_ops = {
 293         .s_stream = omap3isp_stat_s_stream,
 294 };
 295
 296 static const struct v4l2_subdev_ops h3a_aewb_subdev_ops = {
 297         .core = &h3a_aewb_subdev_core_ops,
 298         .video = &h3a_aewb_subdev_video_ops,
 299 };
 300
 301 /*
 302  * omap3isp_h3a_aewb_init - Module Initialisation.
 303  */
 304 int omap3isp_h3a_aewb_init(struct isp_device *isp)
 305 {
 306         struct ispstat *aewb = &isp->isp_aewb;
 307         struct omap3isp_h3a_aewb_config *aewb_cfg;
 308         struct omap3isp_h3a_aewb_config *aewb_recover_cfg;
 309         int ret;
 310
 311         aewb_cfg = kzalloc(sizeof(*aewb_cfg), GFP_KERNEL);
 312         if (!aewb_cfg)
 313                 return -ENOMEM;
 314
 315         memset(aewb, 0, sizeof(*aewb));
 316         aewb->ops = &h3a_aewb_ops;
 317         aewb->priv = aewb_cfg;
 318         aewb->dma_ch = -1;
 319         aewb->event_type = V4L2_EVENT_OMAP3ISP_AEWB;
 320         aewb->isp = isp;
 321
 322         /* Set recover state configuration */
 323         aewb_recover_cfg = kzalloc(sizeof(*aewb_recover_cfg), GFP_KERNEL);
 324         if (!aewb_recover_cfg) {
 325                 dev_err(aewb->isp->dev, "AEWB: cannot allocate memory for "
 326                                         "recover configuration.\n");
 327                 ret = -ENOMEM;
 328                 goto err_recover_alloc;
 329         }
 330
 331         aewb_recover_cfg->saturation_limit = OMAP3ISP_AEWB_MAX_SATURATION_LIM;
 332         aewb_recover_cfg->win_height = OMAP3ISP_AEWB_MIN_WIN_H;
 333         aewb_recover_cfg->win_width = OMAP3ISP_AEWB_MIN_WIN_W;
 334         aewb_recover_cfg->ver_win_count = OMAP3ISP_AEWB_MIN_WINVC;
 335         aewb_recover_cfg->hor_win_count = OMAP3ISP_AEWB_MIN_WINHC;
 336         aewb_recover_cfg->blk_ver_win_start = aewb_recover_cfg->ver_win_start +
 337                 aewb_recover_cfg->win_height * aewb_recover_cfg->ver_win_count;
 338         aewb_recover_cfg->blk_win_height = OMAP3ISP_AEWB_MIN_WIN_H;
 339         aewb_recover_cfg->subsample_ver_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
 340         aewb_recover_cfg->subsample_hor_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
 341
 342         if (h3a_aewb_validate_params(aewb, aewb_recover_cfg)) {
 343                 dev_err(aewb->isp->dev, "AEWB: recover configuration is "
 344                                         "invalid.\n");
 345                 ret = -EINVAL;
 346                 goto err_conf;
 347         }
 348
 349         aewb_recover_cfg->buf_size = h3a_aewb_get_buf_size(aewb_recover_cfg);
 350         aewb->recover_priv = aewb_recover_cfg;
 351
 352         ret = omap3isp_stat_init(aewb, "AEWB", &h3a_aewb_subdev_ops);
 353         if (ret)
 354                 goto err_conf;
 355
 356         return 0;
 357
 358 err_conf:
 359         kfree(aewb_recover_cfg);
 360 err_recover_alloc:
 361         kfree(aewb_cfg);
 362
 363         return ret;
 364 }
 365
 366 /*
 367  * omap3isp_h3a_aewb_cleanup - Module exit.
 368  */
 369 void omap3isp_h3a_aewb_cleanup(struct isp_device *isp)
 370 {
 371         kfree(isp->isp_aewb.priv);
 372         kfree(isp->isp_aewb.recover_priv);
 373         omap3isp_stat_free(&isp->isp_aewb);
 374 }