kernel/drivers/media/platform/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
  18 /* Linux specific include files */
  19 #include <linux/device.h>
  20 #include <linux/slab.h>
  21
  22 #include "isp.h"
  23 #include "isph3a.h"
  24 #include "ispstat.h"
  25
  26 #define IS_OUT_OF_BOUNDS(value, min, max)               \
  27         (((value) < (min)) || ((value) > (max)))
  28
  29 static void h3a_af_setup_regs(struct ispstat *af, void *priv)
  30 {
  31         struct omap3isp_h3a_af_config *conf = priv;
  32         u32 pcr;
  33         u32 pax1;
  34         u32 pax2;
  35         u32 paxstart;
  36         u32 coef;
  37         u32 base_coef_set0;
  38         u32 base_coef_set1;
  39         int index;
  40
  41         if (af->state == ISPSTAT_DISABLED)
  42                 return;
  43
  44         isp_reg_writel(af->isp, af->active_buf->dma_addr, OMAP3_ISP_IOMEM_H3A,
  45                        ISPH3A_AFBUFST);
  46
  47         if (!af->update)
  48                 return;
  49
  50         /* Configure Hardware Registers */
  51         pax1 = ((conf->paxel.width >> 1) - 1) << AF_PAXW_SHIFT;
  52         /* Set height in AFPAX1 */
  53         pax1 |= (conf->paxel.height >> 1) - 1;
  54         isp_reg_writel(af->isp, pax1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX1);
  55
  56         /* Configure AFPAX2 Register */
  57         /* Set Line Increment in AFPAX2 Register */
  58         pax2 = ((conf->paxel.line_inc >> 1) - 1) << AF_LINE_INCR_SHIFT;
  59         /* Set Vertical Count */
  60         pax2 |= (conf->paxel.v_cnt - 1) << AF_VT_COUNT_SHIFT;
  61         /* Set Horizontal Count */
  62         pax2 |= (conf->paxel.h_cnt - 1);
  63         isp_reg_writel(af->isp, pax2, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX2);
  64
  65         /* Configure PAXSTART Register */
  66         /*Configure Horizontal Start */
  67         paxstart = conf->paxel.h_start << AF_HZ_START_SHIFT;
  68         /* Configure Vertical Start */
  69         paxstart |= conf->paxel.v_start;
  70         isp_reg_writel(af->isp, paxstart, OMAP3_ISP_IOMEM_H3A,
  71                        ISPH3A_AFPAXSTART);
  72
  73         /*SetIIRSH Register */
  74         isp_reg_writel(af->isp, conf->iir.h_start,
  75                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AFIIRSH);
  76
  77         base_coef_set0 = ISPH3A_AFCOEF010;
  78         base_coef_set1 = ISPH3A_AFCOEF110;
  79         for (index = 0; index <= 8; index += 2) {
  80                 /*Set IIR Filter0 Coefficients */
  81                 coef = 0;
  82                 coef |= conf->iir.coeff_set0[index];
  83                 coef |= conf->iir.coeff_set0[index + 1] <<
  84                         AF_COEF_SHIFT;
  85                 isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
  86                                base_coef_set0);
  87                 base_coef_set0 += AFCOEF_OFFSET;
  88
  89                 /*Set IIR Filter1 Coefficients */
  90                 coef = 0;
  91                 coef |= conf->iir.coeff_set1[index];
  92                 coef |= conf->iir.coeff_set1[index + 1] <<
  93                         AF_COEF_SHIFT;
  94                 isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
  95                                base_coef_set1);
  96                 base_coef_set1 += AFCOEF_OFFSET;
  97         }
  98         /* set AFCOEF0010 Register */
  99         isp_reg_writel(af->isp, conf->iir.coeff_set0[10],
 100                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AFCOEF0010);
 101         /* set AFCOEF1010 Register */
 102         isp_reg_writel(af->isp, conf->iir.coeff_set1[10],
 103                        OMAP3_ISP_IOMEM_H3A, ISPH3A_AFCOEF1010);
 104
 105         /* PCR Register */
 106         /* Set RGB Position */
 107         pcr = conf->rgb_pos << AF_RGBPOS_SHIFT;
 108         /* Set Accumulator Mode */
 109         if (conf->fvmode == OMAP3ISP_AF_MODE_PEAK)
 110                 pcr |= AF_FVMODE;
 111         /* Set A-law */
 112         if (conf->alaw_enable)
 113                 pcr |= AF_ALAW_EN;
 114         /* HMF Configurations */
 115         if (conf->hmf.enable) {
 116                 /* Enable HMF */
 117                 pcr |= AF_MED_EN;
 118                 /* Set Median Threshold */
 119                 pcr |= conf->hmf.threshold << AF_MED_TH_SHIFT;
 120         }
 121         /* Set PCR Register */
 122         isp_reg_clr_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
 123                         AF_PCR_MASK, pcr);
 124
 125         af->update = 0;
 126         af->config_counter += af->inc_config;
 127         af->inc_config = 0;
 128         af->buf_size = conf->buf_size;
 129 }
 130
 131 static void h3a_af_enable(struct ispstat *af, int enable)
 132 {
 133         if (enable) {
 134                 isp_reg_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
 135                             ISPH3A_PCR_AF_EN);
 136                 omap3isp_subclk_enable(af->isp, OMAP3_ISP_SUBCLK_AF);
 137         } else {
 138                 isp_reg_clr(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
 139                             ISPH3A_PCR_AF_EN);
 140                 omap3isp_subclk_disable(af->isp, OMAP3_ISP_SUBCLK_AF);
 141         }
 142 }
 143
 144 static int h3a_af_busy(struct ispstat *af)
 145 {
 146         return isp_reg_readl(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
 147                                                 & ISPH3A_PCR_BUSYAF;
 148 }
 149
 150 static u32 h3a_af_get_buf_size(struct omap3isp_h3a_af_config *conf)
 151 {
 152         return conf->paxel.h_cnt * conf->paxel.v_cnt * OMAP3ISP_AF_PAXEL_SIZE;
 153 }
 154
 155 /* Function to check paxel parameters */
 156 static int h3a_af_validate_params(struct ispstat *af, void *new_conf)
 157 {
 158         struct omap3isp_h3a_af_config *user_cfg = new_conf;
 159         struct omap3isp_h3a_af_paxel *paxel_cfg = &user_cfg->paxel;
 160         struct omap3isp_h3a_af_iir *iir_cfg = &user_cfg->iir;
 161         int index;
 162         u32 buf_size;
 163
 164         /* Check horizontal Count */
 165         if (IS_OUT_OF_BOUNDS(paxel_cfg->h_cnt,
 166                              OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MIN,
 167                              OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MAX))
 168                 return -EINVAL;
 169
 170         /* Check Vertical Count */
 171         if (IS_OUT_OF_BOUNDS(paxel_cfg->v_cnt,
 172                              OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MIN,
 173                              OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MAX))
 174                 return -EINVAL;
 175
 176         if (IS_OUT_OF_BOUNDS(paxel_cfg->height, OMAP3ISP_AF_PAXEL_HEIGHT_MIN,
 177                              OMAP3ISP_AF_PAXEL_HEIGHT_MAX) ||
 178             paxel_cfg->height % 2)
 179                 return -EINVAL;
 180
 181         /* Check width */
 182         if (IS_OUT_OF_BOUNDS(paxel_cfg->width, OMAP3ISP_AF_PAXEL_WIDTH_MIN,
 183                              OMAP3ISP_AF_PAXEL_WIDTH_MAX) ||
 184             paxel_cfg->width % 2)
 185                 return -EINVAL;
 186
 187         /* Check Line Increment */
 188         if (IS_OUT_OF_BOUNDS(paxel_cfg->line_inc,
 189                              OMAP3ISP_AF_PAXEL_INCREMENT_MIN,
 190                              OMAP3ISP_AF_PAXEL_INCREMENT_MAX) ||
 191             paxel_cfg->line_inc % 2)
 192                 return -EINVAL;
 193
 194         /* Check Horizontal Start */
 195         if ((paxel_cfg->h_start < iir_cfg->h_start) ||
 196             IS_OUT_OF_BOUNDS(paxel_cfg->h_start,
 197                              OMAP3ISP_AF_PAXEL_HZSTART_MIN,
 198                              OMAP3ISP_AF_PAXEL_HZSTART_MAX))
 199                 return -EINVAL;
 200
 201         /* Check IIR */
 202         for (index = 0; index < OMAP3ISP_AF_NUM_COEF; index++) {
 203                 if ((iir_cfg->coeff_set0[index]) > OMAP3ISP_AF_COEF_MAX)
 204                         return -EINVAL;
 205
 206                 if ((iir_cfg->coeff_set1[index]) > OMAP3ISP_AF_COEF_MAX)
 207                         return -EINVAL;
 208         }
 209
 210         if (IS_OUT_OF_BOUNDS(iir_cfg->h_start, OMAP3ISP_AF_IIRSH_MIN,
 211                              OMAP3ISP_AF_IIRSH_MAX))
 212                 return -EINVAL;
 213
 214         /* Hack: If paxel size is 12, the 10th AF window may be corrupted */
 215         if ((paxel_cfg->h_cnt * paxel_cfg->v_cnt > 9) &&
 216             (paxel_cfg->width * paxel_cfg->height == 12))
 217                 return -EINVAL;
 218
 219         buf_size = h3a_af_get_buf_size(user_cfg);
 220         if (buf_size > user_cfg->buf_size)
 221                 /* User buf_size request wasn't enough */
 222                 user_cfg->buf_size = buf_size;
 223         else if (user_cfg->buf_size > OMAP3ISP_AF_MAX_BUF_SIZE)
 224                 user_cfg->buf_size = OMAP3ISP_AF_MAX_BUF_SIZE;
 225
 226         return 0;
 227 }
 228
 229 /* Update local parameters */
 230 static void h3a_af_set_params(struct ispstat *af, void *new_conf)
 231 {
 232         struct omap3isp_h3a_af_config *user_cfg = new_conf;
 233         struct omap3isp_h3a_af_config *cur_cfg = af->priv;
 234         int update = 0;
 235         int index;
 236
 237         /* alaw */
 238         if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
 239                 update = 1;
 240                 goto out;
 241         }
 242
 243         /* hmf */
 244         if (cur_cfg->hmf.enable != user_cfg->hmf.enable) {
 245                 update = 1;
 246                 goto out;
 247         }
 248         if (cur_cfg->hmf.threshold != user_cfg->hmf.threshold) {
 249                 update = 1;
 250                 goto out;
 251         }
 252
 253         /* rgbpos */
 254         if (cur_cfg->rgb_pos != user_cfg->rgb_pos) {
 255                 update = 1;
 256                 goto out;
 257         }
 258
 259         /* iir */
 260         if (cur_cfg->iir.h_start != user_cfg->iir.h_start) {
 261                 update = 1;
 262                 goto out;
 263         }
 264         for (index = 0; index < OMAP3ISP_AF_NUM_COEF; index++) {
 265                 if (cur_cfg->iir.coeff_set0[index] !=
 266                                 user_cfg->iir.coeff_set0[index]) {
 267                         update = 1;
 268                         goto out;
 269                 }
 270                 if (cur_cfg->iir.coeff_set1[index] !=
 271                                 user_cfg->iir.coeff_set1[index]) {
 272                         update = 1;
 273                         goto out;
 274                 }
 275         }
 276
 277         /* paxel */
 278         if ((cur_cfg->paxel.width != user_cfg->paxel.width) ||
 279             (cur_cfg->paxel.height != user_cfg->paxel.height) ||
 280             (cur_cfg->paxel.h_start != user_cfg->paxel.h_start) ||
 281             (cur_cfg->paxel.v_start != user_cfg->paxel.v_start) ||
 282             (cur_cfg->paxel.h_cnt != user_cfg->paxel.h_cnt) ||
 283             (cur_cfg->paxel.v_cnt != user_cfg->paxel.v_cnt) ||
 284             (cur_cfg->paxel.line_inc != user_cfg->paxel.line_inc)) {
 285                 update = 1;
 286                 goto out;
 287         }
 288
 289         /* af_mode */
 290         if (cur_cfg->fvmode != user_cfg->fvmode)
 291                 update = 1;
 292
 293 out:
 294         if (update || !af->configured) {
 295                 memcpy(cur_cfg, user_cfg, sizeof(*cur_cfg));
 296                 af->inc_config++;
 297                 af->update = 1;
 298                 /*
 299                  * User might be asked for a bigger buffer than necessary for
 300                  * this configuration. In order to return the right amount of
 301                  * data during buffer request, let's calculate the size here
 302                  * instead of stick with user_cfg->buf_size.
 303                  */
 304                 cur_cfg->buf_size = h3a_af_get_buf_size(cur_cfg);
 305         }
 306 }
 307
 308 static long h3a_af_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
 309 {
 310         struct ispstat *stat = v4l2_get_subdevdata(sd);
 311
 312         switch (cmd) {
 313         case VIDIOC_OMAP3ISP_AF_CFG:
 314                 return omap3isp_stat_config(stat, arg);
 315         case VIDIOC_OMAP3ISP_STAT_REQ:
 316                 return omap3isp_stat_request_statistics(stat, arg);
 317         case VIDIOC_OMAP3ISP_STAT_EN: {
 318                 int *en = arg;
 319                 return omap3isp_stat_enable(stat, !!*en);
 320         }
 321         }
 322
 323         return -ENOIOCTLCMD;
 324
 325 }
 326
 327 static const struct ispstat_ops h3a_af_ops = {
 328         .validate_params        = h3a_af_validate_params,
 329         .set_params             = h3a_af_set_params,
 330         .setup_regs             = h3a_af_setup_regs,
 331         .enable                 = h3a_af_enable,
 332         .busy                   = h3a_af_busy,
 333 };
 334
 335 static const struct v4l2_subdev_core_ops h3a_af_subdev_core_ops = {
 336         .ioctl = h3a_af_ioctl,
 337         .subscribe_event = omap3isp_stat_subscribe_event,
 338         .unsubscribe_event = omap3isp_stat_unsubscribe_event,
 339 };
 340
 341 static const struct v4l2_subdev_video_ops h3a_af_subdev_video_ops = {
 342         .s_stream = omap3isp_stat_s_stream,
 343 };
 344
 345 static const struct v4l2_subdev_ops h3a_af_subdev_ops = {
 346         .core = &h3a_af_subdev_core_ops,
 347         .video = &h3a_af_subdev_video_ops,
 348 };
 349
 350 /* Function to register the AF character device driver. */
 351 int omap3isp_h3a_af_init(struct isp_device *isp)
 352 {
 353         struct ispstat *af = &isp->isp_af;
 354         struct omap3isp_h3a_af_config *af_cfg;
 355         struct omap3isp_h3a_af_config *af_recover_cfg;
 356
 357         af_cfg = devm_kzalloc(isp->dev, sizeof(*af_cfg), GFP_KERNEL);
 358         if (af_cfg == NULL)
 359                 return -ENOMEM;
 360
 361         af->ops = &h3a_af_ops;
 362         af->priv = af_cfg;
 363         af->event_type = V4L2_EVENT_OMAP3ISP_AF;
 364         af->isp = isp;
 365
 366         /* Set recover state configuration */
 367         af_recover_cfg = devm_kzalloc(isp->dev, sizeof(*af_recover_cfg),
 368                                       GFP_KERNEL);
 369         if (!af_recover_cfg) {
 370                 dev_err(af->isp->dev, "AF: cannot allocate memory for recover "
 371                                       "configuration.\n");
 372                 return -ENOMEM;
 373         }
 374
 375         af_recover_cfg->paxel.h_start = OMAP3ISP_AF_PAXEL_HZSTART_MIN;
 376         af_recover_cfg->paxel.width = OMAP3ISP_AF_PAXEL_WIDTH_MIN;
 377         af_recover_cfg->paxel.height = OMAP3ISP_AF_PAXEL_HEIGHT_MIN;
 378         af_recover_cfg->paxel.h_cnt = OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MIN;
 379         af_recover_cfg->paxel.v_cnt = OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MIN;
 380         af_recover_cfg->paxel.line_inc = OMAP3ISP_AF_PAXEL_INCREMENT_MIN;
 381         if (h3a_af_validate_params(af, af_recover_cfg)) {
 382                 dev_err(af->isp->dev, "AF: recover configuration is "
 383                                       "invalid.\n");
 384                 return -EINVAL;
 385         }
 386
 387         af_recover_cfg->buf_size = h3a_af_get_buf_size(af_recover_cfg);
 388         af->recover_priv = af_recover_cfg;
 389
 390         return omap3isp_stat_init(af, "AF", &h3a_af_subdev_ops);
 391 }
 392
 393 void omap3isp_h3a_af_cleanup(struct isp_device *isp)
 394 {
 395         omap3isp_stat_cleanup(&isp->isp_af);
 396 }