// SPDX-License-Identifier: GPL-2.0-only
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/*
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* isph3a.c
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*
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* TI OMAP3 ISP - H3A module
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*
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* Copyright (C) 2010 Nokia Corporation
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* Copyright (C) 2009 Texas Instruments, Inc.
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*
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* Contacts: David Cohen <dacohen@gmail.com>
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* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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* Sakari Ailus <sakari.ailus@iki.fi>
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*/
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include "isp.h"
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#include "isph3a.h"
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#include "ispstat.h"
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/*
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* h3a_aewb_update_regs - Helper function to update h3a registers.
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*/
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static void h3a_aewb_setup_regs(struct ispstat *aewb, void *priv)
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{
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struct omap3isp_h3a_aewb_config *conf = priv;
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u32 pcr;
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u32 win1;
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u32 start;
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u32 blk;
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u32 subwin;
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if (aewb->state == ISPSTAT_DISABLED)
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return;
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isp_reg_writel(aewb->isp, aewb->active_buf->dma_addr,
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OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWBUFST);
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if (!aewb->update)
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return;
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/* Converting config metadata into reg values */
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pcr = conf->saturation_limit << ISPH3A_PCR_AEW_AVE2LMT_SHIFT;
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pcr |= !!conf->alaw_enable << ISPH3A_PCR_AEW_ALAW_EN_SHIFT;
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win1 = ((conf->win_height >> 1) - 1) << ISPH3A_AEWWIN1_WINH_SHIFT;
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win1 |= ((conf->win_width >> 1) - 1) << ISPH3A_AEWWIN1_WINW_SHIFT;
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win1 |= (conf->ver_win_count - 1) << ISPH3A_AEWWIN1_WINVC_SHIFT;
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win1 |= (conf->hor_win_count - 1) << ISPH3A_AEWWIN1_WINHC_SHIFT;
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start = conf->hor_win_start << ISPH3A_AEWINSTART_WINSH_SHIFT;
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start |= conf->ver_win_start << ISPH3A_AEWINSTART_WINSV_SHIFT;
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blk = conf->blk_ver_win_start << ISPH3A_AEWINBLK_WINSV_SHIFT;
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blk |= ((conf->blk_win_height >> 1) - 1) << ISPH3A_AEWINBLK_WINH_SHIFT;
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subwin = ((conf->subsample_ver_inc >> 1) - 1) <<
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ISPH3A_AEWSUBWIN_AEWINCV_SHIFT;
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subwin |= ((conf->subsample_hor_inc >> 1) - 1) <<
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ISPH3A_AEWSUBWIN_AEWINCH_SHIFT;
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isp_reg_writel(aewb->isp, win1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWWIN1);
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isp_reg_writel(aewb->isp, start, OMAP3_ISP_IOMEM_H3A,
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ISPH3A_AEWINSTART);
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isp_reg_writel(aewb->isp, blk, OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWINBLK);
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isp_reg_writel(aewb->isp, subwin, OMAP3_ISP_IOMEM_H3A,
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ISPH3A_AEWSUBWIN);
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isp_reg_clr_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
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ISPH3A_PCR_AEW_MASK, pcr);
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aewb->update = 0;
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aewb->config_counter += aewb->inc_config;
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aewb->inc_config = 0;
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aewb->buf_size = conf->buf_size;
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}
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static void h3a_aewb_enable(struct ispstat *aewb, int enable)
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{
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if (enable) {
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isp_reg_set(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
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ISPH3A_PCR_AEW_EN);
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omap3isp_subclk_enable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
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} else {
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isp_reg_clr(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
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ISPH3A_PCR_AEW_EN);
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omap3isp_subclk_disable(aewb->isp, OMAP3_ISP_SUBCLK_AEWB);
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}
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}
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static int h3a_aewb_busy(struct ispstat *aewb)
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{
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return isp_reg_readl(aewb->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
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& ISPH3A_PCR_BUSYAEAWB;
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}
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static u32 h3a_aewb_get_buf_size(struct omap3isp_h3a_aewb_config *conf)
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{
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/* Number of configured windows + extra row for black data */
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u32 win_count = (conf->ver_win_count + 1) * conf->hor_win_count;
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/*
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* Unsaturated block counts for each 8 windows.
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* 1 extra for the last (win_count % 8) windows if win_count is not
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* divisible by 8.
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*/
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win_count += (win_count + 7) / 8;
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return win_count * AEWB_PACKET_SIZE;
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}
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static int h3a_aewb_validate_params(struct ispstat *aewb, void *new_conf)
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{
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struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
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u32 buf_size;
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if (unlikely(user_cfg->saturation_limit >
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OMAP3ISP_AEWB_MAX_SATURATION_LIM))
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return -EINVAL;
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if (unlikely(user_cfg->win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
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user_cfg->win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
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user_cfg->win_height & 0x01))
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return -EINVAL;
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if (unlikely(user_cfg->win_width < OMAP3ISP_AEWB_MIN_WIN_W ||
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user_cfg->win_width > OMAP3ISP_AEWB_MAX_WIN_W ||
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user_cfg->win_width & 0x01))
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return -EINVAL;
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if (unlikely(user_cfg->ver_win_count < OMAP3ISP_AEWB_MIN_WINVC ||
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user_cfg->ver_win_count > OMAP3ISP_AEWB_MAX_WINVC))
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return -EINVAL;
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if (unlikely(user_cfg->hor_win_count < OMAP3ISP_AEWB_MIN_WINHC ||
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user_cfg->hor_win_count > OMAP3ISP_AEWB_MAX_WINHC))
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return -EINVAL;
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if (unlikely(user_cfg->ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
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return -EINVAL;
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if (unlikely(user_cfg->hor_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
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return -EINVAL;
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if (unlikely(user_cfg->blk_ver_win_start > OMAP3ISP_AEWB_MAX_WINSTART))
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return -EINVAL;
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if (unlikely(user_cfg->blk_win_height < OMAP3ISP_AEWB_MIN_WIN_H ||
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user_cfg->blk_win_height > OMAP3ISP_AEWB_MAX_WIN_H ||
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user_cfg->blk_win_height & 0x01))
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return -EINVAL;
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if (unlikely(user_cfg->subsample_ver_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
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user_cfg->subsample_ver_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
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user_cfg->subsample_ver_inc & 0x01))
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return -EINVAL;
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if (unlikely(user_cfg->subsample_hor_inc < OMAP3ISP_AEWB_MIN_SUB_INC ||
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user_cfg->subsample_hor_inc > OMAP3ISP_AEWB_MAX_SUB_INC ||
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user_cfg->subsample_hor_inc & 0x01))
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return -EINVAL;
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buf_size = h3a_aewb_get_buf_size(user_cfg);
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if (buf_size > user_cfg->buf_size)
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user_cfg->buf_size = buf_size;
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else if (user_cfg->buf_size > OMAP3ISP_AEWB_MAX_BUF_SIZE)
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user_cfg->buf_size = OMAP3ISP_AEWB_MAX_BUF_SIZE;
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return 0;
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}
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/*
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* h3a_aewb_set_params - Helper function to check & store user given params.
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* @new_conf: Pointer to AE and AWB parameters struct.
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*
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* As most of them are busy-lock registers, need to wait until AEW_BUSY = 0 to
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* program them during ISR.
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*/
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static void h3a_aewb_set_params(struct ispstat *aewb, void *new_conf)
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{
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struct omap3isp_h3a_aewb_config *user_cfg = new_conf;
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struct omap3isp_h3a_aewb_config *cur_cfg = aewb->priv;
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int update = 0;
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if (cur_cfg->saturation_limit != user_cfg->saturation_limit) {
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cur_cfg->saturation_limit = user_cfg->saturation_limit;
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update = 1;
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}
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if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
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cur_cfg->alaw_enable = user_cfg->alaw_enable;
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update = 1;
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}
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if (cur_cfg->win_height != user_cfg->win_height) {
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cur_cfg->win_height = user_cfg->win_height;
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update = 1;
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}
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if (cur_cfg->win_width != user_cfg->win_width) {
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cur_cfg->win_width = user_cfg->win_width;
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update = 1;
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}
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if (cur_cfg->ver_win_count != user_cfg->ver_win_count) {
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cur_cfg->ver_win_count = user_cfg->ver_win_count;
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update = 1;
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}
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if (cur_cfg->hor_win_count != user_cfg->hor_win_count) {
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cur_cfg->hor_win_count = user_cfg->hor_win_count;
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update = 1;
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}
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if (cur_cfg->ver_win_start != user_cfg->ver_win_start) {
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cur_cfg->ver_win_start = user_cfg->ver_win_start;
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update = 1;
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}
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if (cur_cfg->hor_win_start != user_cfg->hor_win_start) {
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cur_cfg->hor_win_start = user_cfg->hor_win_start;
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update = 1;
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}
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if (cur_cfg->blk_ver_win_start != user_cfg->blk_ver_win_start) {
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cur_cfg->blk_ver_win_start = user_cfg->blk_ver_win_start;
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update = 1;
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}
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if (cur_cfg->blk_win_height != user_cfg->blk_win_height) {
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cur_cfg->blk_win_height = user_cfg->blk_win_height;
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update = 1;
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}
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if (cur_cfg->subsample_ver_inc != user_cfg->subsample_ver_inc) {
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cur_cfg->subsample_ver_inc = user_cfg->subsample_ver_inc;
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update = 1;
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}
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if (cur_cfg->subsample_hor_inc != user_cfg->subsample_hor_inc) {
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cur_cfg->subsample_hor_inc = user_cfg->subsample_hor_inc;
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update = 1;
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}
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if (update || !aewb->configured) {
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aewb->inc_config++;
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aewb->update = 1;
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cur_cfg->buf_size = h3a_aewb_get_buf_size(cur_cfg);
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}
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}
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static long h3a_aewb_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
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{
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struct ispstat *stat = v4l2_get_subdevdata(sd);
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switch (cmd) {
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case VIDIOC_OMAP3ISP_AEWB_CFG:
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return omap3isp_stat_config(stat, arg);
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case VIDIOC_OMAP3ISP_STAT_REQ:
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return omap3isp_stat_request_statistics(stat, arg);
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case VIDIOC_OMAP3ISP_STAT_REQ_TIME32:
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return omap3isp_stat_request_statistics_time32(stat, arg);
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case VIDIOC_OMAP3ISP_STAT_EN: {
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unsigned long *en = arg;
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return omap3isp_stat_enable(stat, !!*en);
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}
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}
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return -ENOIOCTLCMD;
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}
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static const struct ispstat_ops h3a_aewb_ops = {
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.validate_params = h3a_aewb_validate_params,
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.set_params = h3a_aewb_set_params,
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.setup_regs = h3a_aewb_setup_regs,
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.enable = h3a_aewb_enable,
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.busy = h3a_aewb_busy,
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};
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static const struct v4l2_subdev_core_ops h3a_aewb_subdev_core_ops = {
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.ioctl = h3a_aewb_ioctl,
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.subscribe_event = omap3isp_stat_subscribe_event,
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.unsubscribe_event = omap3isp_stat_unsubscribe_event,
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};
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static const struct v4l2_subdev_video_ops h3a_aewb_subdev_video_ops = {
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.s_stream = omap3isp_stat_s_stream,
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};
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static const struct v4l2_subdev_ops h3a_aewb_subdev_ops = {
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.core = &h3a_aewb_subdev_core_ops,
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.video = &h3a_aewb_subdev_video_ops,
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};
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/*
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* omap3isp_h3a_aewb_init - Module Initialisation.
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*/
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int omap3isp_h3a_aewb_init(struct isp_device *isp)
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{
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struct ispstat *aewb = &isp->isp_aewb;
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struct omap3isp_h3a_aewb_config *aewb_cfg;
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struct omap3isp_h3a_aewb_config *aewb_recover_cfg = NULL;
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int ret;
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aewb_cfg = kzalloc(sizeof(*aewb_cfg), GFP_KERNEL);
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if (!aewb_cfg)
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return -ENOMEM;
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aewb->ops = &h3a_aewb_ops;
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aewb->priv = aewb_cfg;
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aewb->event_type = V4L2_EVENT_OMAP3ISP_AEWB;
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aewb->isp = isp;
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/* Set recover state configuration */
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aewb_recover_cfg = kzalloc(sizeof(*aewb_recover_cfg), GFP_KERNEL);
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if (!aewb_recover_cfg) {
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dev_err(aewb->isp->dev,
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"AEWB: cannot allocate memory for recover configuration.\n");
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ret = -ENOMEM;
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goto err;
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}
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aewb_recover_cfg->saturation_limit = OMAP3ISP_AEWB_MAX_SATURATION_LIM;
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aewb_recover_cfg->win_height = OMAP3ISP_AEWB_MIN_WIN_H;
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aewb_recover_cfg->win_width = OMAP3ISP_AEWB_MIN_WIN_W;
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aewb_recover_cfg->ver_win_count = OMAP3ISP_AEWB_MIN_WINVC;
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aewb_recover_cfg->hor_win_count = OMAP3ISP_AEWB_MIN_WINHC;
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aewb_recover_cfg->blk_ver_win_start = aewb_recover_cfg->ver_win_start +
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aewb_recover_cfg->win_height * aewb_recover_cfg->ver_win_count;
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aewb_recover_cfg->blk_win_height = OMAP3ISP_AEWB_MIN_WIN_H;
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aewb_recover_cfg->subsample_ver_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
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aewb_recover_cfg->subsample_hor_inc = OMAP3ISP_AEWB_MIN_SUB_INC;
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if (h3a_aewb_validate_params(aewb, aewb_recover_cfg)) {
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dev_err(aewb->isp->dev,
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"AEWB: recover configuration is invalid.\n");
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ret = -EINVAL;
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goto err;
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}
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aewb_recover_cfg->buf_size = h3a_aewb_get_buf_size(aewb_recover_cfg);
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aewb->recover_priv = aewb_recover_cfg;
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ret = omap3isp_stat_init(aewb, "AEWB", &h3a_aewb_subdev_ops);
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err:
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if (ret) {
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kfree(aewb_cfg);
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kfree(aewb_recover_cfg);
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}
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return ret;
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}
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/*
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* omap3isp_h3a_aewb_cleanup - Module exit.
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*/
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void omap3isp_h3a_aewb_cleanup(struct isp_device *isp)
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{
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omap3isp_stat_cleanup(&isp->isp_aewb);
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}
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