drivers/media/video/omap3isp/isph3a_af.c

   1 /*
   2  * isph3a_af.c
   3  *
   4  * TI OMAP3 ISP - H3A AF 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 /* Linux specific include files */
  29 #include <linux/device.h>
  30 #include <linux/slab.h>
  31
  32 #include "isp.h"
  33 #include "isph3a.h"
  34 #include "ispstat.h"
  35
  36 #define IS_OUT_OF_BOUNDS(value, min, max)               \
  37         (((value) < (min)) || ((value) > (max)))
  38
  39 static void h3a_af_setup_regs(struct ispstat *af, void *priv)
  40 {
  41         struct omap3isp_h3a_af_config *conf = priv;
  42         u32 pcr;
  43         u32 pax1;
  44         u32 pax2;
  45         u32 paxstart;
  46         u32 coef;
  47         u32 base_coef_set0;
  48         u32 base_coef_set1;
  49         int index;
  50
  51         if (af->state == ISPSTAT_DISABLED)
  52                 return;
  53
  54         isp_reg_writel(af->isp, af->active_buf->iommu_addr, OMAP3_ISP_IOMEM_H3A,
  55                        ISPH3A_AFBUFST);
  56
  57         if (!af->update)
  58                 return;
  59
  60         /* Configure Hardware Registers */
  61         pax1 = ((conf->paxel.width >> 1) - 1) << AF_PAXW_SHIFT;
  62         /* Set height in AFPAX1 */
  63         pax1 |= (conf->paxel.height >> 1) - 1;
  64         isp_reg_writel(af->isp, pax1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX1);
  65
  66         /* Configure AFPAX2 Register */
  67         /* Set Line Increment in AFPAX2 Register */
  68         pax2 = ((conf->paxel.line_inc >> 1) - 1) << AF_LINE_INCR_SHIFT;
  69         /* Set Vertical Count */
  70         pax2 |= (conf->paxel.v_cnt - 1) << AF_VT_COUNT_SHIFT;
  71         /* Set Horizontal Count */
  72         pax2 |= (conf->paxel.h_cnt - 1);
  73         isp_reg_writel(af->isp, pax2, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX2);
  74
  75         /* Configure PAXSTART Register */
  76         /*Configure Horizontal Start */
  77         paxstart = conf->paxel.h_start << AF_HZ_START_SHIFT;
  78         /* Configure Vertical Start */
  79         paxstart |= conf->paxel.v_start;
  80         isp_reg_writel(af->isp, paxstart, OMAP3_ISP_IOMEM_H3A,
  81                        ISPH3A_AFPAXSTART);
  82
  83         /*SetIIRSH Register */
  84         isp_reg_writel(af->isp, conf->iir.h_start,
  85                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AFIIRSH);
  86
  87         base_coef_set0 = ISPH3A_AFCOEF010;
  88         base_coef_set1 = ISPH3A_AFCOEF110;
  89         for (index = 0; index <= 8; index += 2) {
  90                 /*Set IIR Filter0 Coefficients */
  91                 coef = 0;
  92                 coef |= conf->iir.coeff_set0[index];
  93                 coef |= conf->iir.coeff_set0[index + 1] <<
  94                         AF_COEF_SHIFT;
  95                 isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
  96                                base_coef_set0);
  97                 base_coef_set0 += AFCOEF_OFFSET;
  98
  99                 /*Set IIR Filter1 Coefficients */
 100                 coef = 0;
 101                 coef |= conf->iir.coeff_set1[index];
 102                 coef |= conf->iir.coeff_set1[index + 1] <<
 103                         AF_COEF_SHIFT;
 104                 isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
 105                                base_coef_set1);
 106                 base_coef_set1 += AFCOEF_OFFSET;
 107         }
 108         /* set AFCOEF0010 Register */
 109         isp_reg_writel(af->isp, conf->iir.coeff_set0[10],
 110                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AFCOEF0010);
 111         /* set AFCOEF1010 Register */
 112         isp_reg_writel(af->isp, conf->iir.coeff_set1[10],
 113                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AFCOEF1010);
 114
 115         /* PCR Register */
 116         /* Set RGB Position */
 117         pcr = conf->rgb_pos << AF_RGBPOS_SHIFT;
 118         /* Set Accumulator Mode */
 119         if (conf->fvmode == OMAP3ISP_AF_MODE_PEAK)
 120                 pcr |= AF_FVMODE;
 121         /* Set A-law */
 122         if (conf->alaw_enable)
 123                 pcr |= AF_ALAW_EN;
 124         /* HMF Configurations */
 125         if (conf->hmf.enable) {
 126                 /* Enable HMF */
 127                 pcr |= AF_MED_EN;
 128                 /* Set Median Threshold */
 129                 pcr |= conf->hmf.threshold << AF_MED_TH_SHIFT;
 130         }
 131         /* Set PCR Register */
 132         isp_reg_clr_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
 133                         AF_PCR_MASK, pcr);
 134
 135         af->update = 0;
 136         af->config_counter += af->inc_config;
 137         af->inc_config = 0;
 138         af->buf_size = conf->buf_size;
 139 }
 140
 141 static void h3a_af_enable(struct ispstat *af, int enable)
 142 {
 143         if (enable) {
 144                 isp_reg_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
 145                             ISPH3A_PCR_AF_EN);
 146                 /* This bit is already set if AEWB is enabled */
 147                 if (af->isp->isp_aewb.state != ISPSTAT_ENABLED)
 148                         isp_reg_set(af->isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
 149                                     ISPCTRL_H3A_CLK_EN);
 150         } else {
 151                 isp_reg_clr(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
 152                             ISPH3A_PCR_AF_EN);
 153                 /* This bit can't be cleared if AEWB is enabled */
 154                 if (af->isp->isp_aewb.state != ISPSTAT_ENABLED)
 155                         isp_reg_clr(af->isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
 156                                     ISPCTRL_H3A_CLK_EN);
 157         }
 158 }
 159
 160 static int h3a_af_busy(struct ispstat *af)
 161 {
 162         return isp_reg_readl(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
 163                                                 & ISPH3A_PCR_BUSYAF;
 164 }
 165
 166 static u32 h3a_af_get_buf_size(struct omap3isp_h3a_af_config *conf)
 167 {
 168         return conf->paxel.h_cnt * conf->paxel.v_cnt * OMAP3ISP_AF_PAXEL_SIZE;
 169 }
 170
 171 /* Function to check paxel parameters */
 172 static int h3a_af_validate_params(struct ispstat *af, void *new_conf)
 173 {
 174         struct omap3isp_h3a_af_config *user_cfg = new_conf;
 175         struct omap3isp_h3a_af_paxel *paxel_cfg = &user_cfg->paxel;
 176         struct omap3isp_h3a_af_iir *iir_cfg = &user_cfg->iir;
 177         int index;
 178         u32 buf_size;
 179
 180         /* Check horizontal Count */
 181         if (IS_OUT_OF_BOUNDS(paxel_cfg->h_cnt,
 182                              OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MIN,
 183                              OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MAX))
 184                 return -EINVAL;
 185
 186         /* Check Vertical Count */
 187         if (IS_OUT_OF_BOUNDS(paxel_cfg->v_cnt,
 188                              OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MIN,
 189                              OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MAX))
 190                 return -EINVAL;
 191
 192         if (IS_OUT_OF_BOUNDS(paxel_cfg->height, OMAP3ISP_AF_PAXEL_HEIGHT_MIN,
 193                              OMAP3ISP_AF_PAXEL_HEIGHT_MAX) ||
 194             paxel_cfg->height % 2)
 195                 return -EINVAL;
 196
 197         /* Check width */
 198         if (IS_OUT_OF_BOUNDS(paxel_cfg->width, OMAP3ISP_AF_PAXEL_WIDTH_MIN,
 199                              OMAP3ISP_AF_PAXEL_WIDTH_MAX) ||
 200             paxel_cfg->width % 2)
 201                 return -EINVAL;
 202
 203         /* Check Line Increment */
 204         if (IS_OUT_OF_BOUNDS(paxel_cfg->line_inc,
 205                              OMAP3ISP_AF_PAXEL_INCREMENT_MIN,
 206                              OMAP3ISP_AF_PAXEL_INCREMENT_MAX) ||
 207             paxel_cfg->line_inc % 2)
 208                 return -EINVAL;
 209
 210         /* Check Horizontal Start */
 211         if ((paxel_cfg->h_start < iir_cfg->h_start) ||
 212             IS_OUT_OF_BOUNDS(paxel_cfg->h_start,
 213                              OMAP3ISP_AF_PAXEL_HZSTART_MIN,
 214                              OMAP3ISP_AF_PAXEL_HZSTART_MAX))
 215                 return -EINVAL;
 216
 217         /* Check IIR */
 218         for (index = 0; index < OMAP3ISP_AF_NUM_COEF; index++) {
 219                 if ((iir_cfg->coeff_set0[index]) > OMAP3ISP_AF_COEF_MAX)
 220                         return -EINVAL;
 221
 222                 if ((iir_cfg->coeff_set1[index]) > OMAP3ISP_AF_COEF_MAX)
 223                         return -EINVAL;
 224         }
 225
 226         if (IS_OUT_OF_BOUNDS(iir_cfg->h_start, OMAP3ISP_AF_IIRSH_MIN,
 227                              OMAP3ISP_AF_IIRSH_MAX))
 228                 return -EINVAL;
 229
 230         /* Hack: If paxel size is 12, the 10th AF window may be corrupted */
 231         if ((paxel_cfg->h_cnt * paxel_cfg->v_cnt > 9) &&
 232             (paxel_cfg->width * paxel_cfg->height == 12))
 233                 return -EINVAL;
 234
 235         buf_size = h3a_af_get_buf_size(user_cfg);
 236         if (buf_size > user_cfg->buf_size)
 237                 /* User buf_size request wasn't enough */
 238                 user_cfg->buf_size = buf_size;
 239         else if (user_cfg->buf_size > OMAP3ISP_AF_MAX_BUF_SIZE)
 240                 user_cfg->buf_size = OMAP3ISP_AF_MAX_BUF_SIZE;
 241
 242         return 0;
 243 }
 244
 245 /* Update local parameters */
 246 static void h3a_af_set_params(struct ispstat *af, void *new_conf)
 247 {
 248         struct omap3isp_h3a_af_config *user_cfg = new_conf;
 249         struct omap3isp_h3a_af_config *cur_cfg = af->priv;
 250         int update = 0;
 251         int index;
 252
 253         /* alaw */
 254         if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
 255                 update = 1;
 256                 goto out;
 257         }
 258
 259         /* hmf */
 260         if (cur_cfg->hmf.enable != user_cfg->hmf.enable) {
 261                 update = 1;
 262                 goto out;
 263         }
 264         if (cur_cfg->hmf.threshold != user_cfg->hmf.threshold) {
 265                 update = 1;
 266                 goto out;
 267         }
 268
 269         /* rgbpos */
 270         if (cur_cfg->rgb_pos != user_cfg->rgb_pos) {
 271                 update = 1;
 272                 goto out;
 273         }
 274
 275         /* iir */
 276         if (cur_cfg->iir.h_start != user_cfg->iir.h_start) {
 277                 update = 1;
 278                 goto out;
 279         }
 280         for (index = 0; index < OMAP3ISP_AF_NUM_COEF; index++) {
 281                 if (cur_cfg->iir.coeff_set0[index] !=
 282                                 user_cfg->iir.coeff_set0[index]) {
 283                         update = 1;
 284                         goto out;
 285                 }
 286                 if (cur_cfg->iir.coeff_set1[index] !=
 287                                 user_cfg->iir.coeff_set1[index]) {
 288                         update = 1;
 289                         goto out;
 290                 }
 291         }
 292
 293         /* paxel */
 294         if ((cur_cfg->paxel.width != user_cfg->paxel.width) ||
 295             (cur_cfg->paxel.height != user_cfg->paxel.height) ||
 296             (cur_cfg->paxel.h_start != user_cfg->paxel.h_start) ||
 297             (cur_cfg->paxel.v_start != user_cfg->paxel.v_start) ||
 298             (cur_cfg->paxel.h_cnt != user_cfg->paxel.h_cnt) ||
 299             (cur_cfg->paxel.v_cnt != user_cfg->paxel.v_cnt) ||
 300             (cur_cfg->paxel.line_inc != user_cfg->paxel.line_inc)) {
 301                 update = 1;
 302                 goto out;
 303         }
 304
 305         /* af_mode */
 306         if (cur_cfg->fvmode != user_cfg->fvmode)
 307                 update = 1;
 308
 309 out:
 310         if (update || !af->configured) {
 311                 memcpy(cur_cfg, user_cfg, sizeof(*cur_cfg));
 312                 af->inc_config++;
 313                 af->update = 1;
 314                 /*
 315                  * User might be asked for a bigger buffer than necessary for
 316                  * this configuration. In order to return the right amount of
 317                  * data during buffer request, let's calculate the size here
 318                  * instead of stick with user_cfg->buf_size.
 319                  */
 320                 cur_cfg->buf_size = h3a_af_get_buf_size(cur_cfg);
 321         }
 322 }
 323
 324 static long h3a_af_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
 325 {
 326         struct ispstat *stat = v4l2_get_subdevdata(sd);
 327
 328         switch (cmd) {
 329         case VIDIOC_OMAP3ISP_AF_CFG:
 330                 return omap3isp_stat_config(stat, arg);
 331         case VIDIOC_OMAP3ISP_STAT_REQ:
 332                 return omap3isp_stat_request_statistics(stat, arg);
 333         case VIDIOC_OMAP3ISP_STAT_EN: {
 334                 int *en = arg;
 335                 return omap3isp_stat_enable(stat, !!*en);
 336         }
 337         }
 338
 339         return -ENOIOCTLCMD;
 340
 341 }
 342
 343 static const struct ispstat_ops h3a_af_ops = {
 344         .validate_params        = h3a_af_validate_params,
 345         .set_params             = h3a_af_set_params,
 346         .setup_regs             = h3a_af_setup_regs,
 347         .enable                 = h3a_af_enable,
 348         .busy                   = h3a_af_busy,
 349 };
 350
 351 static const struct v4l2_subdev_core_ops h3a_af_subdev_core_ops = {
 352         .ioctl = h3a_af_ioctl,
 353         .subscribe_event = omap3isp_stat_subscribe_event,
 354         .unsubscribe_event = omap3isp_stat_unsubscribe_event,
 355 };
 356
 357 static const struct v4l2_subdev_video_ops h3a_af_subdev_video_ops = {
 358         .s_stream = omap3isp_stat_s_stream,
 359 };
 360
 361 static const struct v4l2_subdev_ops h3a_af_subdev_ops = {
 362         .core = &h3a_af_subdev_core_ops,
 363         .video = &h3a_af_subdev_video_ops,
 364 };
 365
 366 /* Function to register the AF character device driver. */
 367 int omap3isp_h3a_af_init(struct isp_device *isp)
 368 {
 369         struct ispstat *af = &isp->isp_af;
 370         struct omap3isp_h3a_af_config *af_cfg;
 371         struct omap3isp_h3a_af_config *af_recover_cfg;
 372         int ret;
 373
 374         af_cfg = kzalloc(sizeof(*af_cfg), GFP_KERNEL);
 375         if (af_cfg == NULL)
 376                 return -ENOMEM;
 377
 378         memset(af, 0, sizeof(*af));
 379         af->ops = &h3a_af_ops;
 380         af->priv = af_cfg;
 381         af->dma_ch = -1;
 382         af->event_type = V4L2_EVENT_OMAP3ISP_AF;
 383         af->isp = isp;
 384
 385         /* Set recover state configuration */
 386         af_recover_cfg = kzalloc(sizeof(*af_recover_cfg), GFP_KERNEL);
 387         if (!af_recover_cfg) {
 388                 dev_err(af->isp->dev, "AF: cannot allocate memory for recover "
 389                                       "configuration.\n");
 390                 ret = -ENOMEM;
 391                 goto err_recover_alloc;
 392         }
 393
 394         af_recover_cfg->paxel.h_start = OMAP3ISP_AF_PAXEL_HZSTART_MIN;
 395         af_recover_cfg->paxel.width = OMAP3ISP_AF_PAXEL_WIDTH_MIN;
 396         af_recover_cfg->paxel.height = OMAP3ISP_AF_PAXEL_HEIGHT_MIN;
 397         af_recover_cfg->paxel.h_cnt = OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MIN;
 398         af_recover_cfg->paxel.v_cnt = OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MIN;
 399         af_recover_cfg->paxel.line_inc = OMAP3ISP_AF_PAXEL_INCREMENT_MIN;
 400         if (h3a_af_validate_params(af, af_recover_cfg)) {
 401                 dev_err(af->isp->dev, "AF: recover configuration is "
 402                                       "invalid.\n");
 403                 ret = -EINVAL;
 404                 goto err_conf;
 405         }
 406
 407         af_recover_cfg->buf_size = h3a_af_get_buf_size(af_recover_cfg);
 408         af->recover_priv = af_recover_cfg;
 409
 410         ret = omap3isp_stat_init(af, "AF", &h3a_af_subdev_ops);
 411         if (ret)
 412                 goto err_conf;
 413
 414         return 0;
 415
 416 err_conf:
 417         kfree(af_recover_cfg);
 418 err_recover_alloc:
 419         kfree(af_cfg);
 420
 421         return ret;
 422 }
 423
 424 void omap3isp_h3a_af_cleanup(struct isp_device *isp)
 425 {
 426         kfree(isp->isp_af.priv);
 427         kfree(isp->isp_af.recover_priv);
 428         omap3isp_stat_free(&isp->isp_af);
 429 }