1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * isph3a.c
4 *
5 * TI OMAP3 ISP - H3A module
6 *
7 * Copyright (C) 2010 Nokia Corporation
8 * Copyright (C) 2009 Texas Instruments, Inc.
9 *
10 * Contacts: David Cohen <dacohen@gmail.com>
11 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
12 * Sakari Ailus <sakari.ailus@iki.fi>
13 */
14
15 #include <linux/slab.h>
16 #include <linux/uaccess.h>
17
18 #include "isp.h"
19 #include "isph3a.h"
20 #include "ispstat.h"
21
22 /*
23 * h3a_aewb_update_regs - Helper function to update h3a registers.
24 */
h3a_aewb_setup_regs(struct ispstat * aewb,void * priv)25 static void h3a_aewb_setup_regs(struct ispstat *aewb, void *priv)
26 {
27 struct omap3isp_h3a_aewb_config *conf = priv;
28 u32 pcr;
29 u32 win1;
30 u32 start;
31 u32 blk;
32 u32 subwin;
33
34 if (aewb->state == ISPSTAT_DISABLED)
35 return;
36
37 isp_reg_writel(aewb->isp, aewb->active_buf->dma_addr,
38 OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWBUFST);
39
40 if (!aewb->update)
41 return;
42
43 /* Converting config metadata into reg values */
44 pcr = conf->saturation_limit << ISPH3A_PCR_AEW_AVE2LMT_SHIFT;
45 pcr |= !!conf->alaw_enable << ISPH3A_PCR_AEW_ALAW_EN_SHIFT;
46
47 win1 = ((conf->win_height >> 1) - 1) << ISPH3A_AEWWIN1_WINH_SHIFT;
48 win1 |= ((conf->win_width >> 1) - 1) << ISPH3A_AEWWIN1_WINW_SHIFT;
49 win1 |= (conf->ver_win_count - 1) << ISPH3A_AEWWIN1_WINVC_SHIFT;
50 win1 |= (conf->hor_win_count - 1) << ISPH3A_AEWWIN1_WINHC_SHIFT;
51
52 start = conf->hor_win_start << ISPH3A_AEWINSTART_WINSH_SHIFT;
53 start |= conf->ver_win_start << ISPH3A_AEWINSTART_WINSV_SHIFT;
54
55 blk = conf->blk_ver_win_start << ISPH3A_AEWINBLK_WINSV_SHIFT;
56 blk |= ((conf->blk_win_height >> 1) - 1) << ISPH3A_AEWINBLK_WINH_SHIFT;
57
58 subwin = ((conf->subsample_ver_inc >> 1) - 1) <<
59 ISPH3A_AEWSUBWIN_AEWINCV_SHIFT;
60 subwin |= ((conf->subsample_hor_inc >> 1) - 1) <<
61 ISPH3A_AEWSUBWIN_AEWINCH_SHIFT;
62
63 isp_reg_writel(aewb->isp, win1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWWIN1);
64 isp_reg_writel(aewb->isp, start, OMAP3_ISP_IOMEM_H3A,
65 ISPH3A_AEWINSTART);
66 isp_reg_writel(aewb->isp, blk, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWINBLK);
67 isp_reg_writel(aewb->isp, subwin, OMAP3_ISP_IOMEM_H3A,
68 ISPH3A_AEWSUBWIN);
69 isp_reg_clr_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
70 ISPH3A_PCR_AEW_MASK, pcr);
71
72 aewb->update = 0;
73 aewb->config_counter += aewb->inc_config;
74 aewb->inc_config = 0;
75 aewb->buf_size = conf->buf_size;
76 }
77
h3a_aewb_enable(struct ispstat * aewb,int enable)78 static void h3a_aewb_enable(struct ispstat *aewb, int enable)
79 {
80 if (enable) {
81 isp_reg_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
82 ISPH3A_PCR_AEW_EN);
83 omap3isp_subclk_enable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
84 } else {
85 isp_reg_clr(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
86 ISPH3A_PCR_AEW_EN);
87 omap3isp_subclk_disable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
88 }
89 }
90
h3a_aewb_busy(struct ispstat * aewb)91 static int h3a_aewb_busy(struct ispstat *aewb)
92 {
93 return isp_reg_readl(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
94 & ISPH3A_PCR_BUSYAEAWB;
95 }
96
h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config * conf)97 static u32 h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config *conf)
98 {
99 /* Number of configured windows + extra row for black data */
100 u32 win_count = (conf->ver_win_count + 1) * conf->hor_win_count;
101
102 /*
103 * Unsaturated block counts for each 8 windows.
104 * 1 extra for the last (win_count % 8) windows if win_count is not
105 * divisible by 8.
106 */
107 win_count += (win_count + 7) / 8;
108
109 return win_count * AEWB_PACKET_SIZE;
110 }
111
h3a_aewb_validate_params(struct ispstat * aewb,void * new_conf)112 static int h3a_aewb_validate_params(struct ispstat *aewb, void *new_conf)
113 {
114 struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
115 u32 buf_size;
116
117 if (unlikely(user_cfg->saturation_limit >
118 OMAP3ISP_AEWB_MAX_SATURATION_LIM))
119 return -EINVAL;
120
121 if (unlikely(user_cfg->win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
122 user_cfg->win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
123 user_cfg->win_height & 0x01))
124 return -EINVAL;
125
126 if (unlikely(user_cfg->win_width < OMAP3ISP_AEWB_MIN_WIN_W ||
127 user_cfg->win_width > OMAP3ISP_AEWB_MAX_WIN_W ||
128 user_cfg->win_width & 0x01))
129 return -EINVAL;
130
131 if (unlikely(user_cfg->ver_win_count < OMAP3ISP_AEWB_MIN_WINVC ||
132 user_cfg->ver_win_count > OMAP3ISP_AEWB_MAX_WINVC))
133 return -EINVAL;
134
135 if (unlikely(user_cfg->hor_win_count < OMAP3ISP_AEWB_MIN_WINHC ||
136 user_cfg->hor_win_count > OMAP3ISP_AEWB_MAX_WINHC))
137 return -EINVAL;
138
139 if (unlikely(user_cfg->ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
140 return -EINVAL;
141
142 if (unlikely(user_cfg->hor_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
143 return -EINVAL;
144
145 if (unlikely(user_cfg->blk_ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
146 return -EINVAL;
147
148 if (unlikely(user_cfg->blk_win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
149 user_cfg->blk_win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
150 user_cfg->blk_win_height & 0x01))
151 return -EINVAL;
152
153 if (unlikely(user_cfg->subsample_ver_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
154 user_cfg->subsample_ver_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
155 user_cfg->subsample_ver_inc & 0x01))
156 return -EINVAL;
157
158 if (unlikely(user_cfg->subsample_hor_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
159 user_cfg->subsample_hor_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
160 user_cfg->subsample_hor_inc & 0x01))
161 return -EINVAL;
162
163 buf_size = h3a_aewb_get_buf_size(user_cfg);
164 if (buf_size > user_cfg->buf_size)
165 user_cfg->buf_size = buf_size;
166 else if (user_cfg->buf_size > OMAP3ISP_AEWB_MAX_BUF_SIZE)
167 user_cfg->buf_size = OMAP3ISP_AEWB_MAX_BUF_SIZE;
168
169 return 0;
170 }
171
172 /*
173 * h3a_aewb_set_params - Helper function to check & store user given params.
174 * @new_conf: Pointer to AE and AWB parameters struct.
175 *
176 * As most of them are busy-lock registers, need to wait until AEW_BUSY = 0 to
177 * program them during ISR.
178 */
h3a_aewb_set_params(struct ispstat * aewb,void * new_conf)179 static void h3a_aewb_set_params(struct ispstat *aewb, void *new_conf)
180 {
181 struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
182 struct omap3isp_h3a_aewb_config *cur_cfg = aewb->priv;
183 int update = 0;
184
185 if (cur_cfg->saturation_limit != user_cfg->saturation_limit) {
186 cur_cfg->saturation_limit = user_cfg->saturation_limit;
187 update = 1;
188 }
189 if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
190 cur_cfg->alaw_enable = user_cfg->alaw_enable;
191 update = 1;
192 }
193 if (cur_cfg->win_height != user_cfg->win_height) {
194 cur_cfg->win_height = user_cfg->win_height;
195 update = 1;
196 }
197 if (cur_cfg->win_width != user_cfg->win_width) {
198 cur_cfg->win_width = user_cfg->win_width;
199 update = 1;
200 }
201 if (cur_cfg->ver_win_count != user_cfg->ver_win_count) {
202 cur_cfg->ver_win_count = user_cfg->ver_win_count;
203 update = 1;
204 }
205 if (cur_cfg->hor_win_count != user_cfg->hor_win_count) {
206 cur_cfg->hor_win_count = user_cfg->hor_win_count;
207 update = 1;
208 }
209 if (cur_cfg->ver_win_start != user_cfg->ver_win_start) {
210 cur_cfg->ver_win_start = user_cfg->ver_win_start;
211 update = 1;
212 }
213 if (cur_cfg->hor_win_start != user_cfg->hor_win_start) {
214 cur_cfg->hor_win_start = user_cfg->hor_win_start;
215 update = 1;
216 }
217 if (cur_cfg->blk_ver_win_start != user_cfg->blk_ver_win_start) {
218 cur_cfg->blk_ver_win_start = user_cfg->blk_ver_win_start;
219 update = 1;
220 }
221 if (cur_cfg->blk_win_height != user_cfg->blk_win_height) {
222 cur_cfg->blk_win_height = user_cfg->blk_win_height;
223 update = 1;
224 }
225 if (cur_cfg->subsample_ver_inc != user_cfg->subsample_ver_inc) {
226 cur_cfg->subsample_ver_inc = user_cfg->subsample_ver_inc;
227 update = 1;
228 }
229 if (cur_cfg->subsample_hor_inc != user_cfg->subsample_hor_inc) {
230 cur_cfg->subsample_hor_inc = user_cfg->subsample_hor_inc;
231 update = 1;
232 }
233
234 if (update || !aewb->configured) {
235 aewb->inc_config++;
236 aewb->update = 1;
237 cur_cfg->buf_size = h3a_aewb_get_buf_size(cur_cfg);
238 }
239 }
240
h3a_aewb_ioctl(struct v4l2_subdev * sd,unsigned int cmd,void * arg)241 static long h3a_aewb_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
242 {
243 struct ispstat *stat = v4l2_get_subdevdata(sd);
244
245 switch (cmd) {
246 case VIDIOC_OMAP3ISP_AEWB_CFG:
247 return omap3isp_stat_config(stat, arg);
248 case VIDIOC_OMAP3ISP_STAT_REQ:
249 return omap3isp_stat_request_statistics(stat, arg);
250 case VIDIOC_OMAP3ISP_STAT_REQ_TIME32:
251 return omap3isp_stat_request_statistics_time32(stat, arg);
252 case VIDIOC_OMAP3ISP_STAT_EN: {
253 unsigned long *en = arg;
254 return omap3isp_stat_enable(stat, !!*en);
255 }
256 }
257
258 return -ENOIOCTLCMD;
259 }
260
261 static const struct ispstat_ops h3a_aewb_ops = {
262 .validate_params = h3a_aewb_validate_params,
263 .set_params = h3a_aewb_set_params,
264 .setup_regs = h3a_aewb_setup_regs,
265 .enable = h3a_aewb_enable,
266 .busy = h3a_aewb_busy,
267 };
268
269 static const struct v4l2_subdev_core_ops h3a_aewb_subdev_core_ops = {
270 .ioctl = h3a_aewb_ioctl,
271 .subscribe_event = omap3isp_stat_subscribe_event,
272 .unsubscribe_event = omap3isp_stat_unsubscribe_event,
273 };
274
275 static const struct v4l2_subdev_video_ops h3a_aewb_subdev_video_ops = {
276 .s_stream = omap3isp_stat_s_stream,
277 };
278
279 static const struct v4l2_subdev_ops h3a_aewb_subdev_ops = {
280 .core = &h3a_aewb_subdev_core_ops,
281 .video = &h3a_aewb_subdev_video_ops,
282 };
283
284 /*
285 * omap3isp_h3a_aewb_init - Module Initialisation.
286 */
omap3isp_h3a_aewb_init(struct isp_device * isp)287 int omap3isp_h3a_aewb_init(struct isp_device *isp)
288 {
289 struct ispstat *aewb = &isp->isp_aewb;
290 struct omap3isp_h3a_aewb_config *aewb_cfg;
291 struct omap3isp_h3a_aewb_config *aewb_recover_cfg = NULL;
292 int ret;
293
294 aewb_cfg = kzalloc(sizeof(*aewb_cfg), GFP_KERNEL);
295 if (!aewb_cfg)
296 return -ENOMEM;
297
298 aewb->ops = &h3a_aewb_ops;
299 aewb->priv = aewb_cfg;
300 aewb->event_type = V4L2_EVENT_OMAP3ISP_AEWB;
301 aewb->isp = isp;
302
303 /* Set recover state configuration */
304 aewb_recover_cfg = kzalloc(sizeof(*aewb_recover_cfg), GFP_KERNEL);
305 if (!aewb_recover_cfg) {
306 dev_err(aewb->isp->dev,
307 "AEWB: cannot allocate memory for recover configuration.\n");
308 ret = -ENOMEM;
309 goto err;
310 }
311
312 aewb_recover_cfg->saturation_limit = OMAP3ISP_AEWB_MAX_SATURATION_LIM;
313 aewb_recover_cfg->win_height = OMAP3ISP_AEWB_MIN_WIN_H;
314 aewb_recover_cfg->win_width = OMAP3ISP_AEWB_MIN_WIN_W;
315 aewb_recover_cfg->ver_win_count = OMAP3ISP_AEWB_MIN_WINVC;
316 aewb_recover_cfg->hor_win_count = OMAP3ISP_AEWB_MIN_WINHC;
317 aewb_recover_cfg->blk_ver_win_start = aewb_recover_cfg->ver_win_start +
318 aewb_recover_cfg->win_height * aewb_recover_cfg->ver_win_count;
319 aewb_recover_cfg->blk_win_height = OMAP3ISP_AEWB_MIN_WIN_H;
320 aewb_recover_cfg->subsample_ver_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
321 aewb_recover_cfg->subsample_hor_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
322
323 if (h3a_aewb_validate_params(aewb, aewb_recover_cfg)) {
324 dev_err(aewb->isp->dev,
325 "AEWB: recover configuration is invalid.\n");
326 ret = -EINVAL;
327 goto err;
328 }
329
330 aewb_recover_cfg->buf_size = h3a_aewb_get_buf_size(aewb_recover_cfg);
331 aewb->recover_priv = aewb_recover_cfg;
332
333 ret = omap3isp_stat_init(aewb, "AEWB", &h3a_aewb_subdev_ops);
334
335 err:
336 if (ret) {
337 kfree(aewb_cfg);
338 kfree(aewb_recover_cfg);
339 }
340
341 return ret;
342 }
343
344 /*
345 * omap3isp_h3a_aewb_cleanup - Module exit.
346 */
omap3isp_h3a_aewb_cleanup(struct isp_device * isp)347 void omap3isp_h3a_aewb_cleanup(struct isp_device *isp)
348 {
349 omap3isp_stat_cleanup(&isp->isp_aewb);
350 }
351