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/*
* isph3a.c
*
* TI OMAP3 ISP - H3A module
*
* Copyright (C) 2010 Nokia Corporation
* Copyright (C) 2009 Texas Instruments, Inc.
*
* Contacts: David Cohen <dacohen@gmail.com>
* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "isp.h"
#include "isph3a.h"
#include "ispstat.h"
/*
* h3a_aewb_update_regs - Helper function to update h3a registers.
*/
static void h3a_aewb_setup_regs(struct ispstat *aewb, void *priv)
{
struct omap3isp_h3a_aewb_config *conf = priv;
u32 pcr;
u32 win1;
u32 start;
u32 blk;
u32 subwin;
if (aewb->state == ISPSTAT_DISABLED)
return;
isp_reg_writel(aewb->isp, aewb->active_buf->dma_addr,
OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWBUFST);
if (!aewb->update)
return;
/* Converting config metadata into reg values */
pcr = conf->saturation_limit << ISPH3A_PCR_AEW_AVE2LMT_SHIFT;
pcr |= !!conf->alaw_enable << ISPH3A_PCR_AEW_ALAW_EN_SHIFT;
win1 = ((conf->win_height >> 1) - 1) << ISPH3A_AEWWIN1_WINH_SHIFT;
win1 |= ((conf->win_width >> 1) - 1) << ISPH3A_AEWWIN1_WINW_SHIFT;
win1 |= (conf->ver_win_count - 1) << ISPH3A_AEWWIN1_WINVC_SHIFT;
win1 |= (conf->hor_win_count - 1) << ISPH3A_AEWWIN1_WINHC_SHIFT;
start = conf->hor_win_start << ISPH3A_AEWINSTART_WINSH_SHIFT;
start |= conf->ver_win_start << ISPH3A_AEWINSTART_WINSV_SHIFT;
blk = conf->blk_ver_win_start << ISPH3A_AEWINBLK_WINSV_SHIFT;
blk |= ((conf->blk_win_height >> 1) - 1) << ISPH3A_AEWINBLK_WINH_SHIFT;
subwin = ((conf->subsample_ver_inc >> 1) - 1) <<
ISPH3A_AEWSUBWIN_AEWINCV_SHIFT;
subwin |= ((conf->subsample_hor_inc >> 1) - 1) <<
ISPH3A_AEWSUBWIN_AEWINCH_SHIFT;
isp_reg_writel(aewb->isp, win1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWWIN1);
isp_reg_writel(aewb->isp, start, OMAP3_ISP_IOMEM_H3A,
ISPH3A_AEWINSTART);
isp_reg_writel(aewb->isp, blk, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWINBLK);
isp_reg_writel(aewb->isp, subwin, OMAP3_ISP_IOMEM_H3A,
ISPH3A_AEWSUBWIN);
isp_reg_clr_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
ISPH3A_PCR_AEW_MASK, pcr);
aewb->update = 0;
aewb->config_counter += aewb->inc_config;
aewb->inc_config = 0;
aewb->buf_size = conf->buf_size;
}
static void h3a_aewb_enable(struct ispstat *aewb, int enable)
{
if (enable) {
isp_reg_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
ISPH3A_PCR_AEW_EN);
omap3isp_subclk_enable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
} else {
isp_reg_clr(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
ISPH3A_PCR_AEW_EN);
omap3isp_subclk_disable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
}
}
static int h3a_aewb_busy(struct ispstat *aewb)
{
return isp_reg_readl(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
& ISPH3A_PCR_BUSYAEAWB;
}
static u32 h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config *conf)
{
/* Number of configured windows + extra row for black data */
u32 win_count = (conf->ver_win_count + 1) * conf->hor_win_count;
/*
* Unsaturated block counts for each 8 windows.
* 1 extra for the last (win_count % 8) windows if win_count is not
* divisible by 8.
*/
win_count += (win_count + 7) / 8;
return win_count * AEWB_PACKET_SIZE;
}
static int h3a_aewb_validate_params(struct ispstat *aewb, void *new_conf)
{
struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
u32 buf_size;
if (unlikely(user_cfg->saturation_limit >
OMAP3ISP_AEWB_MAX_SATURATION_LIM))
return -EINVAL;
if (unlikely(user_cfg->win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
user_cfg->win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
user_cfg->win_height & 0x01))
return -EINVAL;
if (unlikely(user_cfg->win_width < OMAP3ISP_AEWB_MIN_WIN_W ||
user_cfg->win_width > OMAP3ISP_AEWB_MAX_WIN_W ||
user_cfg->win_width & 0x01))
return -EINVAL;
if (unlikely(user_cfg->ver_win_count < OMAP3ISP_AEWB_MIN_WINVC ||
user_cfg->ver_win_count > OMAP3ISP_AEWB_MAX_WINVC))
return -EINVAL;
if (unlikely(user_cfg->hor_win_count < OMAP3ISP_AEWB_MIN_WINHC ||
user_cfg->hor_win_count > OMAP3ISP_AEWB_MAX_WINHC))
return -EINVAL;
if (unlikely(user_cfg->ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
return -EINVAL;
if (unlikely(user_cfg->hor_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
return -EINVAL;
if (unlikely(user_cfg->blk_ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
return -EINVAL;
if (unlikely(user_cfg->blk_win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
user_cfg->blk_win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
user_cfg->blk_win_height & 0x01))
return -EINVAL;
if (unlikely(user_cfg->subsample_ver_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
user_cfg->subsample_ver_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
user_cfg->subsample_ver_inc & 0x01))
return -EINVAL;
if (unlikely(user_cfg->subsample_hor_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
user_cfg->subsample_hor_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
user_cfg->subsample_hor_inc & 0x01))
return -EINVAL;
buf_size = h3a_aewb_get_buf_size(user_cfg);
if (buf_size > user_cfg->buf_size)
user_cfg->buf_size = buf_size;
else if (user_cfg->buf_size > OMAP3ISP_AEWB_MAX_BUF_SIZE)
user_cfg->buf_size = OMAP3ISP_AEWB_MAX_BUF_SIZE;
return 0;
}
/*
* h3a_aewb_set_params - Helper function to check & store user given params.
* @new_conf: Pointer to AE and AWB parameters struct.
*
* As most of them are busy-lock registers, need to wait until AEW_BUSY = 0 to
* program them during ISR.
*/
static void h3a_aewb_set_params(struct ispstat *aewb, void *new_conf)
{
struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
struct omap3isp_h3a_aewb_config *cur_cfg = aewb->priv;
int update = 0;
if (cur_cfg->saturation_limit != user_cfg->saturation_limit) {
cur_cfg->saturation_limit = user_cfg->saturation_limit;
update = 1;
}
if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
cur_cfg->alaw_enable = user_cfg->alaw_enable;
update = 1;
}
if (cur_cfg->win_height != user_cfg->win_height) {
cur_cfg->win_height = user_cfg->win_height;
update = 1;
}
if (cur_cfg->win_width != user_cfg->win_width) {
cur_cfg->win_width = user_cfg->win_width;
update = 1;
}
if (cur_cfg->ver_win_count != user_cfg->ver_win_count) {
cur_cfg->ver_win_count = user_cfg->ver_win_count;
update = 1;
}
if (cur_cfg->hor_win_count != user_cfg->hor_win_count) {
cur_cfg->hor_win_count = user_cfg->hor_win_count;
update = 1;
}
if (cur_cfg->ver_win_start != user_cfg->ver_win_start) {
cur_cfg->ver_win_start = user_cfg->ver_win_start;
update = 1;
}
if (cur_cfg->hor_win_start != user_cfg->hor_win_start) {
cur_cfg->hor_win_start = user_cfg->hor_win_start;
update = 1;
}
if (cur_cfg->blk_ver_win_start != user_cfg->blk_ver_win_start) {
cur_cfg->blk_ver_win_start = user_cfg->blk_ver_win_start;
update = 1;
}
if (cur_cfg->blk_win_height != user_cfg->blk_win_height) {
cur_cfg->blk_win_height = user_cfg->blk_win_height;
update = 1;
}
if (cur_cfg->subsample_ver_inc != user_cfg->subsample_ver_inc) {
cur_cfg->subsample_ver_inc = user_cfg->subsample_ver_inc;
update = 1;
}
if (cur_cfg->subsample_hor_inc != user_cfg->subsample_hor_inc) {
cur_cfg->subsample_hor_inc = user_cfg->subsample_hor_inc;
update = 1;
}
if (update || !aewb->configured) {
aewb->inc_config++;
aewb->update = 1;
cur_cfg->buf_size = h3a_aewb_get_buf_size(cur_cfg);
}
}
static long h3a_aewb_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
struct ispstat *stat = v4l2_get_subdevdata(sd);
switch (cmd) {
case VIDIOC_OMAP3ISP_AEWB_CFG:
return omap3isp_stat_config(stat, arg);
case VIDIOC_OMAP3ISP_STAT_REQ:
return omap3isp_stat_request_statistics(stat, arg);
case VIDIOC_OMAP3ISP_STAT_EN: {
unsigned long *en = arg;
return omap3isp_stat_enable(stat, !!*en);
}
}
return -ENOIOCTLCMD;
}
static const struct ispstat_ops h3a_aewb_ops = {
.validate_params = h3a_aewb_validate_params,
.set_params = h3a_aewb_set_params,
.setup_regs = h3a_aewb_setup_regs,
.enable = h3a_aewb_enable,
.busy = h3a_aewb_busy,
};
static const struct v4l2_subdev_core_ops h3a_aewb_subdev_core_ops = {
.ioctl = h3a_aewb_ioctl,
.subscribe_event = omap3isp_stat_subscribe_event,
.unsubscribe_event = omap3isp_stat_unsubscribe_event,
};
static const struct v4l2_subdev_video_ops h3a_aewb_subdev_video_ops = {
.s_stream = omap3isp_stat_s_stream,
};
static const struct v4l2_subdev_ops h3a_aewb_subdev_ops = {
.core = &h3a_aewb_subdev_core_ops,
.video = &h3a_aewb_subdev_video_ops,
};
/*
* omap3isp_h3a_aewb_init - Module Initialisation.
*/
int omap3isp_h3a_aewb_init(struct isp_device *isp)
{
struct ispstat *aewb = &isp->isp_aewb;
struct omap3isp_h3a_aewb_config *aewb_cfg;
struct omap3isp_h3a_aewb_config *aewb_recover_cfg;
aewb_cfg = devm_kzalloc(isp->dev, sizeof(*aewb_cfg), GFP_KERNEL);
if (!aewb_cfg)
return -ENOMEM;
aewb->ops = &h3a_aewb_ops;
aewb->priv = aewb_cfg;
aewb->dma_ch = -1;
aewb->event_type = V4L2_EVENT_OMAP3ISP_AEWB;
aewb->isp = isp;
/* Set recover state configuration */
aewb_recover_cfg = devm_kzalloc(isp->dev, sizeof(*aewb_recover_cfg),
GFP_KERNEL);
if (!aewb_recover_cfg) {
dev_err(aewb->isp->dev, "AEWB: cannot allocate memory for "
"recover configuration.\n");
return -ENOMEM;
}
aewb_recover_cfg->saturation_limit = OMAP3ISP_AEWB_MAX_SATURATION_LIM;
aewb_recover_cfg->win_height = OMAP3ISP_AEWB_MIN_WIN_H;
aewb_recover_cfg->win_width = OMAP3ISP_AEWB_MIN_WIN_W;
aewb_recover_cfg->ver_win_count = OMAP3ISP_AEWB_MIN_WINVC;
aewb_recover_cfg->hor_win_count = OMAP3ISP_AEWB_MIN_WINHC;
aewb_recover_cfg->blk_ver_win_start = aewb_recover_cfg->ver_win_start +
aewb_recover_cfg->win_height * aewb_recover_cfg->ver_win_count;
aewb_recover_cfg->blk_win_height = OMAP3ISP_AEWB_MIN_WIN_H;
aewb_recover_cfg->subsample_ver_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
aewb_recover_cfg->subsample_hor_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
if (h3a_aewb_validate_params(aewb, aewb_recover_cfg)) {
dev_err(aewb->isp->dev, "AEWB: recover configuration is "
"invalid.\n");
return -EINVAL;
}
aewb_recover_cfg->buf_size = h3a_aewb_get_buf_size(aewb_recover_cfg);
aewb->recover_priv = aewb_recover_cfg;
return omap3isp_stat_init(aewb, "AEWB", &h3a_aewb_subdev_ops);
}
/*
* omap3isp_h3a_aewb_cleanup - Module exit.
*/
void omap3isp_h3a_aewb_cleanup(struct isp_device *isp)
{
omap3isp_stat_cleanup(&isp->isp_aewb);
}
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