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                 omap3isp_subclk_enable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
  97         } else {
  98                 isp_reg_clr(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
  99                             ISPH3A_PCR_AEW_EN);
 100                 omap3isp_subclk_disable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
 101         }
 102 }
 103
 104 static int h3a_aewb_busy(struct ispstat *aewb)
 105 {
 106         return isp_reg_readl(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
 107                                                 & ISPH3A_PCR_BUSYAEAWB;
 108 }
 109
 110 static u32 h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config *conf)
 111 {
 112         /* Number of configured windows + extra row for black data */
 113         u32 win_count = (conf->ver_win_count + 1) * conf->hor_win_count;
 114
 115         /*
 116          * Unsaturated block counts for each 8 windows.
 117          * 1 extra for the last (win_count % 8) windows if win_count is not
 118          * divisible by 8.
 119          */
 120         win_count += (win_count + 7) / 8;
 121
 122         return win_count * AEWB_PACKET_SIZE;
 123 }
 124
 125 static int h3a_aewb_validate_params(struct ispstat *aewb, void *new_conf)
 126 {
 127         struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
 128         u32 buf_size;
 129
 130         if (unlikely(user_cfg->saturation_limit >
 131                      OMAP3ISP_AEWB_MAX_SATURATION_LIM))
 132                 return -EINVAL;
 133
 134         if (unlikely(user_cfg->win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
 135                      user_cfg->win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
 136                      user_cfg->win_height & 0x01))
 137                 return -EINVAL;
 138
 139         if (unlikely(user_cfg->win_width < OMAP3ISP_AEWB_MIN_WIN_W ||
 140                      user_cfg->win_width > OMAP3ISP_AEWB_MAX_WIN_W ||
 141                      user_cfg->win_width & 0x01))
 142                 return -EINVAL;
 143
 144         if (unlikely(user_cfg->ver_win_count < OMAP3ISP_AEWB_MIN_WINVC ||
 145                      user_cfg->ver_win_count > OMAP3ISP_AEWB_MAX_WINVC))
 146                 return -EINVAL;
 147
 148         if (unlikely(user_cfg->hor_win_count < OMAP3ISP_AEWB_MIN_WINHC ||
 149                      user_cfg->hor_win_count > OMAP3ISP_AEWB_MAX_WINHC))
 150                 return -EINVAL;
 151
 152         if (unlikely(user_cfg->ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 153                 return -EINVAL;
 154
 155         if (unlikely(user_cfg->hor_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 156                 return -EINVAL;
 157
 158         if (unlikely(user_cfg->blk_ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
 159                 return -EINVAL;
 160
 161         if (unlikely(user_cfg->blk_win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
 162                      user_cfg->blk_win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
 163                      user_cfg->blk_win_height & 0x01))
 164                 return -EINVAL;
 165
 166         if (unlikely(user_cfg->subsample_ver_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
 167                      user_cfg->subsample_ver_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
 168                      user_cfg->subsample_ver_inc & 0x01))
 169                 return -EINVAL;
 170
 171         if (unlikely(user_cfg->subsample_hor_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
 172                      user_cfg->subsample_hor_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
 173                      user_cfg->subsample_hor_inc & 0x01))
 174                 return -EINVAL;
 175
 176         buf_size = h3a_aewb_get_buf_size(user_cfg);
 177         if (buf_size > user_cfg->buf_size)
 178                 user_cfg->buf_size = buf_size;
 179         else if (user_cfg->buf_size > OMAP3ISP_AEWB_MAX_BUF_SIZE)
 180                 user_cfg->buf_size = OMAP3ISP_AEWB_MAX_BUF_SIZE;
 181
 182         return 0;
 183 }
 184
 185 /*
 186  * h3a_aewb_set_params - Helper function to check & store user given params.
 187  * @new_conf: Pointer to AE and AWB parameters struct.
 188  *
 189  * As most of them are busy-lock registers, need to wait until AEW_BUSY = 0 to
 190  * program them during ISR.
 191  */
 192 static void h3a_aewb_set_params(struct ispstat *aewb, void *new_conf)
 193 {
 194         struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
 195         struct omap3isp_h3a_aewb_config *cur_cfg = aewb->priv;
 196         int update = 0;
 197
 198         if (cur_cfg->saturation_limit != user_cfg->saturation_limit) {
 199                 cur_cfg->saturation_limit = user_cfg->saturation_limit;
 200                 update = 1;
 201         }
 202         if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
 203                 cur_cfg->alaw_enable = user_cfg->alaw_enable;
 204                 update = 1;
 205         }
 206         if (cur_cfg->win_height != user_cfg->win_height) {
 207                 cur_cfg->win_height = user_cfg->win_height;
 208                 update = 1;
 209         }
 210         if (cur_cfg->win_width != user_cfg->win_width) {
 211                 cur_cfg->win_width = user_cfg->win_width;
 212                 update = 1;
 213         }
 214         if (cur_cfg->ver_win_count != user_cfg->ver_win_count) {
 215                 cur_cfg->ver_win_count = user_cfg->ver_win_count;
 216                 update = 1;
 217         }
 218         if (cur_cfg->hor_win_count != user_cfg->hor_win_count) {
 219                 cur_cfg->hor_win_count = user_cfg->hor_win_count;
 220                 update = 1;
 221         }
 222         if (cur_cfg->ver_win_start != user_cfg->ver_win_start) {
 223                 cur_cfg->ver_win_start = user_cfg->ver_win_start;
 224                 update = 1;
 225         }
 226         if (cur_cfg->hor_win_start != user_cfg->hor_win_start) {
 227                 cur_cfg->hor_win_start = user_cfg->hor_win_start;
 228                 update = 1;
 229         }
 230         if (cur_cfg->blk_ver_win_start != user_cfg->blk_ver_win_start) {
 231                 cur_cfg->blk_ver_win_start = user_cfg->blk_ver_win_start;
 232                 update = 1;
 233         }
 234         if (cur_cfg->blk_win_height != user_cfg->blk_win_height) {
 235                 cur_cfg->blk_win_height = user_cfg->blk_win_height;
 236                 update = 1;
 237         }
 238         if (cur_cfg->subsample_ver_inc != user_cfg->subsample_ver_inc) {
 239                 cur_cfg->subsample_ver_inc = user_cfg->subsample_ver_inc;
 240                 update = 1;
 241         }
 242         if (cur_cfg->subsample_hor_inc != user_cfg->subsample_hor_inc) {
 243                 cur_cfg->subsample_hor_inc = user_cfg->subsample_hor_inc;
 244                 update = 1;
 245         }
 246
 247         if (update || !aewb->configured) {
 248                 aewb->inc_config++;
 249                 aewb->update = 1;
 250                 cur_cfg->buf_size = h3a_aewb_get_buf_size(cur_cfg);
 251         }
 252 }
 253
 254 static long h3a_aewb_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
 255 {
 256         struct ispstat *stat = v4l2_get_subdevdata(sd);
 257
 258         switch (cmd) {
 259         case VIDIOC_OMAP3ISP_AEWB_CFG:
 260                 return omap3isp_stat_config(stat, arg);
 261         case VIDIOC_OMAP3ISP_STAT_REQ:
 262                 return omap3isp_stat_request_statistics(stat, arg);
 263         case VIDIOC_OMAP3ISP_STAT_EN: {
 264                 unsigned long *en = arg;
 265                 return omap3isp_stat_enable(stat, !!*en);
 266         }
 267         }
 268
 269         return -ENOIOCTLCMD;
 270 }
 271
 272 static const struct ispstat_ops h3a_aewb_ops = {
 273         .validate_params        = h3a_aewb_validate_params,
 274         .set_params             = h3a_aewb_set_params,
 275         .setup_regs             = h3a_aewb_setup_regs,
 276         .enable                 = h3a_aewb_enable,
 277         .busy                   = h3a_aewb_busy,
 278 };
 279
 280 static const struct v4l2_subdev_core_ops h3a_aewb_subdev_core_ops = {
 281         .ioctl = h3a_aewb_ioctl,
 282         .subscribe_event = omap3isp_stat_subscribe_event,
 283         .unsubscribe_event = omap3isp_stat_unsubscribe_event,
 284 };
 285
 286 static const struct v4l2_subdev_video_ops h3a_aewb_subdev_video_ops = {
 287         .s_stream = omap3isp_stat_s_stream,
 288 };
 289
 290 static const struct v4l2_subdev_ops h3a_aewb_subdev_ops = {
 291         .core = &h3a_aewb_subdev_core_ops,
 292         .video = &h3a_aewb_subdev_video_ops,
 293 };
 294
 295 /*
 296  * omap3isp_h3a_aewb_init - Module Initialisation.
 297  */
 298 int omap3isp_h3a_aewb_init(struct isp_device *isp)
 299 {
 300         struct ispstat *aewb = &isp->isp_aewb;
 301         struct omap3isp_h3a_aewb_config *aewb_cfg;
 302         struct omap3isp_h3a_aewb_config *aewb_recover_cfg;
 303         int ret;
 304
 305         aewb_cfg = kzalloc(sizeof(*aewb_cfg), GFP_KERNEL);
 306         if (!aewb_cfg)
 307                 return -ENOMEM;
 308
 309         memset(aewb, 0, sizeof(*aewb));
 310         aewb->ops = &h3a_aewb_ops;
 311         aewb->priv = aewb_cfg;
 312         aewb->dma_ch = -1;
 313         aewb->event_type = V4L2_EVENT_OMAP3ISP_AEWB;
 314         aewb->isp = isp;
 315
 316         /* Set recover state configuration */
 317         aewb_recover_cfg = kzalloc(sizeof(*aewb_recover_cfg), GFP_KERNEL);
 318         if (!aewb_recover_cfg) {
 319                 dev_err(aewb->isp->dev, "AEWB: cannot allocate memory for "
 320                                         "recover configuration.\n");
 321                 ret = -ENOMEM;
 322                 goto err_recover_alloc;
 323         }
 324
 325         aewb_recover_cfg->saturation_limit = OMAP3ISP_AEWB_MAX_SATURATION_LIM;
 326         aewb_recover_cfg->win_height = OMAP3ISP_AEWB_MIN_WIN_H;
 327         aewb_recover_cfg->win_width = OMAP3ISP_AEWB_MIN_WIN_W;
 328         aewb_recover_cfg->ver_win_count = OMAP3ISP_AEWB_MIN_WINVC;
 329         aewb_recover_cfg->hor_win_count = OMAP3ISP_AEWB_MIN_WINHC;
 330         aewb_recover_cfg->blk_ver_win_start = aewb_recover_cfg->ver_win_start +
 331                 aewb_recover_cfg->win_height * aewb_recover_cfg->ver_win_count;
 332         aewb_recover_cfg->blk_win_height = OMAP3ISP_AEWB_MIN_WIN_H;
 333         aewb_recover_cfg->subsample_ver_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
 334         aewb_recover_cfg->subsample_hor_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
 335
 336         if (h3a_aewb_validate_params(aewb, aewb_recover_cfg)) {
 337                 dev_err(aewb->isp->dev, "AEWB: recover configuration is "
 338                                         "invalid.\n");
 339                 ret = -EINVAL;
 340                 goto err_conf;
 341         }
 342
 343         aewb_recover_cfg->buf_size = h3a_aewb_get_buf_size(aewb_recover_cfg);
 344         aewb->recover_priv = aewb_recover_cfg;
 345
 346         ret = omap3isp_stat_init(aewb, "AEWB", &h3a_aewb_subdev_ops);
 347         if (ret)
 348                 goto err_conf;
 349
 350         return 0;
 351
 352 err_conf:
 353         kfree(aewb_recover_cfg);
 354 err_recover_alloc:
 355         kfree(aewb_cfg);
 356
 357         return ret;
 358 }
 359
 360 /*
 361  * omap3isp_h3a_aewb_cleanup - Module exit.
 362  */
 363 void omap3isp_h3a_aewb_cleanup(struct isp_device *isp)
 364 {
 365         kfree(isp->isp_aewb.priv);
 366         kfree(isp->isp_aewb.recover_priv);
 367         omap3isp_stat_cleanup(&isp->isp_aewb);
 368 }