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 */
h3a_aewb_setup_regs(struct ispstat * aewb,void * priv)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
h3a_aewb_enable(struct ispstat * aewb,int enable)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
h3a_aewb_busy(struct ispstat * aewb)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
h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config * conf)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
h3a_aewb_validate_params(struct ispstat * aewb,void * new_conf)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 */
h3a_aewb_set_params(struct ispstat * aewb,void * new_conf)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
h3a_aewb_ioctl(struct v4l2_subdev * sd,unsigned int cmd,void * arg)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 */
omap3isp_h3a_aewb_init(struct isp_device * isp)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
304 aewb_cfg = devm_kzalloc(isp->dev, sizeof(*aewb_cfg), GFP_KERNEL);
305 if (!aewb_cfg)
306 return -ENOMEM;
307
308 aewb->ops = &h3a_aewb_ops;
309 aewb->priv = aewb_cfg;
310 aewb->dma_ch = -1;
311 aewb->event_type = V4L2_EVENT_OMAP3ISP_AEWB;
312 aewb->isp = isp;
313
314 /* Set recover state configuration */
315 aewb_recover_cfg = devm_kzalloc(isp->dev, sizeof(*aewb_recover_cfg),
316 GFP_KERNEL);
317 if (!aewb_recover_cfg) {
318 dev_err(aewb->isp->dev, "AEWB: cannot allocate memory for "
319 "recover configuration.\n");
320 return -ENOMEM;
321 }
322
323 aewb_recover_cfg->saturation_limit = OMAP3ISP_AEWB_MAX_SATURATION_LIM;
324 aewb_recover_cfg->win_height = OMAP3ISP_AEWB_MIN_WIN_H;
325 aewb_recover_cfg->win_width = OMAP3ISP_AEWB_MIN_WIN_W;
326 aewb_recover_cfg->ver_win_count = OMAP3ISP_AEWB_MIN_WINVC;
327 aewb_recover_cfg->hor_win_count = OMAP3ISP_AEWB_MIN_WINHC;
328 aewb_recover_cfg->blk_ver_win_start = aewb_recover_cfg->ver_win_start +
329 aewb_recover_cfg->win_height * aewb_recover_cfg->ver_win_count;
330 aewb_recover_cfg->blk_win_height = OMAP3ISP_AEWB_MIN_WIN_H;
331 aewb_recover_cfg->subsample_ver_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
332 aewb_recover_cfg->subsample_hor_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
333
334 if (h3a_aewb_validate_params(aewb, aewb_recover_cfg)) {
335 dev_err(aewb->isp->dev, "AEWB: recover configuration is "
336 "invalid.\n");
337 return -EINVAL;
338 }
339
340 aewb_recover_cfg->buf_size = h3a_aewb_get_buf_size(aewb_recover_cfg);
341 aewb->recover_priv = aewb_recover_cfg;
342
343 return omap3isp_stat_init(aewb, "AEWB", &h3a_aewb_subdev_ops);
344 }
345
346 /*
347 * omap3isp_h3a_aewb_cleanup - Module exit.
348 */
omap3isp_h3a_aewb_cleanup(struct isp_device * isp)349 void omap3isp_h3a_aewb_cleanup(struct isp_device *isp)
350 {
351 omap3isp_stat_cleanup(&isp->isp_aewb);
352 }
353