4 * TI OMAP3 ISP - H3A AF module
6 * Copyright (C) 2010 Nokia Corporation
7 * Copyright (C) 2009 Texas Instruments, Inc.
9 * Contacts: David Cohen <dacohen@gmail.com>
10 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
11 * Sakari Ailus <sakari.ailus@iki.fi>
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.
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.
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
28 /* Linux specific include files */
29 #include <linux/device.h>
30 #include <linux/slab.h>
36 #define IS_OUT_OF_BOUNDS(value, min, max) \
37 (((value) < (min)) || ((value) > (max)))
39 static void h3a_af_setup_regs(struct ispstat *af, void *priv)
41 struct omap3isp_h3a_af_config *conf = priv;
51 if (af->state == ISPSTAT_DISABLED)
54 isp_reg_writel(af->isp, af->active_buf->iommu_addr, OMAP3_ISP_IOMEM_H3A,
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);
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);
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,
83 /*SetIIRSH Register */
84 isp_reg_writel(af->isp, conf->iir.h_start,
85 OMAP3_ISP_IOMEM_H3A, ISPH3A_AFIIRSH);
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 */
92 coef |= conf->iir.coeff_set0[index];
93 coef |= conf->iir.coeff_set0[index + 1] <<
95 isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
97 base_coef_set0 += AFCOEF_OFFSET;
99 /*Set IIR Filter1 Coefficients */
101 coef |= conf->iir.coeff_set1[index];
102 coef |= conf->iir.coeff_set1[index + 1] <<
104 isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
106 base_coef_set1 += AFCOEF_OFFSET;
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);
116 /* Set RGB Position */
117 pcr = conf->rgb_pos << AF_RGBPOS_SHIFT;
118 /* Set Accumulator Mode */
119 if (conf->fvmode == OMAP3ISP_AF_MODE_PEAK)
122 if (conf->alaw_enable)
124 /* HMF Configurations */
125 if (conf->hmf.enable) {
128 /* Set Median Threshold */
129 pcr |= conf->hmf.threshold << AF_MED_TH_SHIFT;
131 /* Set PCR Register */
132 isp_reg_clr_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
136 af->config_counter += af->inc_config;
138 af->buf_size = conf->buf_size;
141 static void h3a_af_enable(struct ispstat *af, int enable)
144 isp_reg_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
146 omap3isp_subclk_enable(af->isp, OMAP3_ISP_SUBCLK_AF);
148 isp_reg_clr(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
150 omap3isp_subclk_disable(af->isp, OMAP3_ISP_SUBCLK_AF);
154 static int h3a_af_busy(struct ispstat *af)
156 return isp_reg_readl(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
160 static u32 h3a_af_get_buf_size(struct omap3isp_h3a_af_config *conf)
162 return conf->paxel.h_cnt * conf->paxel.v_cnt * OMAP3ISP_AF_PAXEL_SIZE;
165 /* Function to check paxel parameters */
166 static int h3a_af_validate_params(struct ispstat *af, void *new_conf)
168 struct omap3isp_h3a_af_config *user_cfg = new_conf;
169 struct omap3isp_h3a_af_paxel *paxel_cfg = &user_cfg->paxel;
170 struct omap3isp_h3a_af_iir *iir_cfg = &user_cfg->iir;
174 /* Check horizontal Count */
175 if (IS_OUT_OF_BOUNDS(paxel_cfg->h_cnt,
176 OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MIN,
177 OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MAX))
180 /* Check Vertical Count */
181 if (IS_OUT_OF_BOUNDS(paxel_cfg->v_cnt,
182 OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MIN,
183 OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MAX))
186 if (IS_OUT_OF_BOUNDS(paxel_cfg->height, OMAP3ISP_AF_PAXEL_HEIGHT_MIN,
187 OMAP3ISP_AF_PAXEL_HEIGHT_MAX) ||
188 paxel_cfg->height % 2)
192 if (IS_OUT_OF_BOUNDS(paxel_cfg->width, OMAP3ISP_AF_PAXEL_WIDTH_MIN,
193 OMAP3ISP_AF_PAXEL_WIDTH_MAX) ||
194 paxel_cfg->width % 2)
197 /* Check Line Increment */
198 if (IS_OUT_OF_BOUNDS(paxel_cfg->line_inc,
199 OMAP3ISP_AF_PAXEL_INCREMENT_MIN,
200 OMAP3ISP_AF_PAXEL_INCREMENT_MAX) ||
201 paxel_cfg->line_inc % 2)
204 /* Check Horizontal Start */
205 if ((paxel_cfg->h_start < iir_cfg->h_start) ||
206 IS_OUT_OF_BOUNDS(paxel_cfg->h_start,
207 OMAP3ISP_AF_PAXEL_HZSTART_MIN,
208 OMAP3ISP_AF_PAXEL_HZSTART_MAX))
212 for (index = 0; index < OMAP3ISP_AF_NUM_COEF; index++) {
213 if ((iir_cfg->coeff_set0[index]) > OMAP3ISP_AF_COEF_MAX)
216 if ((iir_cfg->coeff_set1[index]) > OMAP3ISP_AF_COEF_MAX)
220 if (IS_OUT_OF_BOUNDS(iir_cfg->h_start, OMAP3ISP_AF_IIRSH_MIN,
221 OMAP3ISP_AF_IIRSH_MAX))
224 /* Hack: If paxel size is 12, the 10th AF window may be corrupted */
225 if ((paxel_cfg->h_cnt * paxel_cfg->v_cnt > 9) &&
226 (paxel_cfg->width * paxel_cfg->height == 12))
229 buf_size = h3a_af_get_buf_size(user_cfg);
230 if (buf_size > user_cfg->buf_size)
231 /* User buf_size request wasn't enough */
232 user_cfg->buf_size = buf_size;
233 else if (user_cfg->buf_size > OMAP3ISP_AF_MAX_BUF_SIZE)
234 user_cfg->buf_size = OMAP3ISP_AF_MAX_BUF_SIZE;
239 /* Update local parameters */
240 static void h3a_af_set_params(struct ispstat *af, void *new_conf)
242 struct omap3isp_h3a_af_config *user_cfg = new_conf;
243 struct omap3isp_h3a_af_config *cur_cfg = af->priv;
248 if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
254 if (cur_cfg->hmf.enable != user_cfg->hmf.enable) {
258 if (cur_cfg->hmf.threshold != user_cfg->hmf.threshold) {
264 if (cur_cfg->rgb_pos != user_cfg->rgb_pos) {
270 if (cur_cfg->iir.h_start != user_cfg->iir.h_start) {
274 for (index = 0; index < OMAP3ISP_AF_NUM_COEF; index++) {
275 if (cur_cfg->iir.coeff_set0[index] !=
276 user_cfg->iir.coeff_set0[index]) {
280 if (cur_cfg->iir.coeff_set1[index] !=
281 user_cfg->iir.coeff_set1[index]) {
288 if ((cur_cfg->paxel.width != user_cfg->paxel.width) ||
289 (cur_cfg->paxel.height != user_cfg->paxel.height) ||
290 (cur_cfg->paxel.h_start != user_cfg->paxel.h_start) ||
291 (cur_cfg->paxel.v_start != user_cfg->paxel.v_start) ||
292 (cur_cfg->paxel.h_cnt != user_cfg->paxel.h_cnt) ||
293 (cur_cfg->paxel.v_cnt != user_cfg->paxel.v_cnt) ||
294 (cur_cfg->paxel.line_inc != user_cfg->paxel.line_inc)) {
300 if (cur_cfg->fvmode != user_cfg->fvmode)
304 if (update || !af->configured) {
305 memcpy(cur_cfg, user_cfg, sizeof(*cur_cfg));
309 * User might be asked for a bigger buffer than necessary for
310 * this configuration. In order to return the right amount of
311 * data during buffer request, let's calculate the size here
312 * instead of stick with user_cfg->buf_size.
314 cur_cfg->buf_size = h3a_af_get_buf_size(cur_cfg);
318 static long h3a_af_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
320 struct ispstat *stat = v4l2_get_subdevdata(sd);
323 case VIDIOC_OMAP3ISP_AF_CFG:
324 return omap3isp_stat_config(stat, arg);
325 case VIDIOC_OMAP3ISP_STAT_REQ:
326 return omap3isp_stat_request_statistics(stat, arg);
327 case VIDIOC_OMAP3ISP_STAT_EN: {
329 return omap3isp_stat_enable(stat, !!*en);
337 static const struct ispstat_ops h3a_af_ops = {
338 .validate_params = h3a_af_validate_params,
339 .set_params = h3a_af_set_params,
340 .setup_regs = h3a_af_setup_regs,
341 .enable = h3a_af_enable,
345 static const struct v4l2_subdev_core_ops h3a_af_subdev_core_ops = {
346 .ioctl = h3a_af_ioctl,
347 .subscribe_event = omap3isp_stat_subscribe_event,
348 .unsubscribe_event = omap3isp_stat_unsubscribe_event,
351 static const struct v4l2_subdev_video_ops h3a_af_subdev_video_ops = {
352 .s_stream = omap3isp_stat_s_stream,
355 static const struct v4l2_subdev_ops h3a_af_subdev_ops = {
356 .core = &h3a_af_subdev_core_ops,
357 .video = &h3a_af_subdev_video_ops,
360 /* Function to register the AF character device driver. */
361 int omap3isp_h3a_af_init(struct isp_device *isp)
363 struct ispstat *af = &isp->isp_af;
364 struct omap3isp_h3a_af_config *af_cfg;
365 struct omap3isp_h3a_af_config *af_recover_cfg;
367 af_cfg = devm_kzalloc(isp->dev, sizeof(*af_cfg), GFP_KERNEL);
371 af->ops = &h3a_af_ops;
374 af->event_type = V4L2_EVENT_OMAP3ISP_AF;
377 /* Set recover state configuration */
378 af_recover_cfg = devm_kzalloc(isp->dev, sizeof(*af_recover_cfg),
380 if (!af_recover_cfg) {
381 dev_err(af->isp->dev, "AF: cannot allocate memory for recover "
386 af_recover_cfg->paxel.h_start = OMAP3ISP_AF_PAXEL_HZSTART_MIN;
387 af_recover_cfg->paxel.width = OMAP3ISP_AF_PAXEL_WIDTH_MIN;
388 af_recover_cfg->paxel.height = OMAP3ISP_AF_PAXEL_HEIGHT_MIN;
389 af_recover_cfg->paxel.h_cnt = OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MIN;
390 af_recover_cfg->paxel.v_cnt = OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MIN;
391 af_recover_cfg->paxel.line_inc = OMAP3ISP_AF_PAXEL_INCREMENT_MIN;
392 if (h3a_af_validate_params(af, af_recover_cfg)) {
393 dev_err(af->isp->dev, "AF: recover configuration is "
398 af_recover_cfg->buf_size = h3a_af_get_buf_size(af_recover_cfg);
399 af->recover_priv = af_recover_cfg;
401 return omap3isp_stat_init(af, "AF", &h3a_af_subdev_ops);
404 void omap3isp_h3a_af_cleanup(struct isp_device *isp)
406 omap3isp_stat_cleanup(&isp->isp_af);