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/*
* isph3a_af.c
*
* TI OMAP3 ISP - H3A AF 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.
*/
/* Linux specific include files */
#include <linux/device.h>
#include <linux/slab.h>
#include "isp.h"
#include "isph3a.h"
#include "ispstat.h"
#define IS_OUT_OF_BOUNDS(value, min, max) \
(((value) < (min)) || ((value) > (max)))
static void h3a_af_setup_regs(struct ispstat *af, void *priv)
{
struct omap3isp_h3a_af_config *conf = priv;
u32 pcr;
u32 pax1;
u32 pax2;
u32 paxstart;
u32 coef;
u32 base_coef_set0;
u32 base_coef_set1;
int index;
if (af->state == ISPSTAT_DISABLED)
return;
isp_reg_writel(af->isp, af->active_buf->dma_addr, OMAP3_ISP_IOMEM_H3A,
ISPH3A_AFBUFST);
if (!af->update)
return;
/* Configure Hardware Registers */
pax1 = ((conf->paxel.width >> 1) - 1) << AF_PAXW_SHIFT;
/* Set height in AFPAX1 */
pax1 |= (conf->paxel.height >> 1) - 1;
isp_reg_writel(af->isp, pax1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX1);
/* Configure AFPAX2 Register */
/* Set Line Increment in AFPAX2 Register */
pax2 = ((conf->paxel.line_inc >> 1) - 1) << AF_LINE_INCR_SHIFT;
/* Set Vertical Count */
pax2 |= (conf->paxel.v_cnt - 1) << AF_VT_COUNT_SHIFT;
/* Set Horizontal Count */
pax2 |= (conf->paxel.h_cnt - 1);
isp_reg_writel(af->isp, pax2, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX2);
/* Configure PAXSTART Register */
/*Configure Horizontal Start */
paxstart = conf->paxel.h_start << AF_HZ_START_SHIFT;
/* Configure Vertical Start */
paxstart |= conf->paxel.v_start;
isp_reg_writel(af->isp, paxstart, OMAP3_ISP_IOMEM_H3A,
ISPH3A_AFPAXSTART);
/*SetIIRSH Register */
isp_reg_writel(af->isp, conf->iir.h_start,
OMAP3_ISP_IOMEM_H3A, ISPH3A_AFIIRSH);
base_coef_set0 = ISPH3A_AFCOEF010;
base_coef_set1 = ISPH3A_AFCOEF110;
for (index = 0; index <= 8; index += 2) {
/*Set IIR Filter0 Coefficients */
coef = 0;
coef |= conf->iir.coeff_set0[index];
coef |= conf->iir.coeff_set0[index + 1] <<
AF_COEF_SHIFT;
isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
base_coef_set0);
base_coef_set0 += AFCOEF_OFFSET;
/*Set IIR Filter1 Coefficients */
coef = 0;
coef |= conf->iir.coeff_set1[index];
coef |= conf->iir.coeff_set1[index + 1] <<
AF_COEF_SHIFT;
isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
base_coef_set1);
base_coef_set1 += AFCOEF_OFFSET;
}
/* set AFCOEF0010 Register */
isp_reg_writel(af->isp, conf->iir.coeff_set0[10],
OMAP3_ISP_IOMEM_H3A, ISPH3A_AFCOEF0010);
/* set AFCOEF1010 Register */
isp_reg_writel(af->isp, conf->iir.coeff_set1[10],
OMAP3_ISP_IOMEM_H3A, ISPH3A_AFCOEF1010);
/* PCR Register */
/* Set RGB Position */
pcr = conf->rgb_pos << AF_RGBPOS_SHIFT;
/* Set Accumulator Mode */
if (conf->fvmode == OMAP3ISP_AF_MODE_PEAK)
pcr |= AF_FVMODE;
/* Set A-law */
if (conf->alaw_enable)
pcr |= AF_ALAW_EN;
/* HMF Configurations */
if (conf->hmf.enable) {
/* Enable HMF */
pcr |= AF_MED_EN;
/* Set Median Threshold */
pcr |= conf->hmf.threshold << AF_MED_TH_SHIFT;
}
/* Set PCR Register */
isp_reg_clr_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
AF_PCR_MASK, pcr);
af->update = 0;
af->config_counter += af->inc_config;
af->inc_config = 0;
af->buf_size = conf->buf_size;
}
static void h3a_af_enable(struct ispstat *af, int enable)
{
if (enable) {
isp_reg_set(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
ISPH3A_PCR_AF_EN);
omap3isp_subclk_enable(af->isp, OMAP3_ISP_SUBCLK_AF);
} else {
isp_reg_clr(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR,
ISPH3A_PCR_AF_EN);
omap3isp_subclk_disable(af->isp, OMAP3_ISP_SUBCLK_AF);
}
}
static int h3a_af_busy(struct ispstat *af)
{
return isp_reg_readl(af->isp, OMAP3_ISP_IOMEM_H3A, ISPH3A_PCR)
& ISPH3A_PCR_BUSYAF;
}
static u32 h3a_af_get_buf_size(struct omap3isp_h3a_af_config *conf)
{
return conf->paxel.h_cnt * conf->paxel.v_cnt * OMAP3ISP_AF_PAXEL_SIZE;
}
/* Function to check paxel parameters */
static int h3a_af_validate_params(struct ispstat *af, void *new_conf)
{
struct omap3isp_h3a_af_config *user_cfg = new_conf;
struct omap3isp_h3a_af_paxel *paxel_cfg = &user_cfg->paxel;
struct omap3isp_h3a_af_iir *iir_cfg = &user_cfg->iir;
int index;
u32 buf_size;
/* Check horizontal Count */
if (IS_OUT_OF_BOUNDS(paxel_cfg->h_cnt,
OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MIN,
OMAP3ISP_AF_PAXEL_HORIZONTAL_COUNT_MAX))
return -EINVAL;
/* Check Vertical Count */
if (IS_OUT_OF_BOUNDS(paxel_cfg->v_cnt,
OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MIN,
OMAP3ISP_AF_PAXEL_VERTICAL_COUNT_MAX))
return -EINVAL;
if (IS_OUT_OF_BOUNDS(paxel_cfg->height, OMAP3ISP_AF_PAXEL_HEIGHT_MIN,
OMAP3ISP_AF_PAXEL_HEIGHT_MAX) ||
paxel_cfg->height % 2)
return -EINVAL;
/* Check width */
if (IS_OUT_OF_BOUNDS(paxel_cfg->width, OMAP3ISP_AF_PAXEL_WIDTH_MIN,
OMAP3ISP_AF_PAXEL_WIDTH_MAX) ||
paxel_cfg->width % 2)
return -EINVAL;
/* Check Line Increment */
if (IS_OUT_OF_BOUNDS(paxel_cfg->line_inc,
OMAP3ISP_AF_PAXEL_INCREMENT_MIN,
OMAP3ISP_AF_PAXEL_INCREMENT_MAX) ||
paxel_cfg->line_inc % 2)
return -EINVAL;
/* Check Horizontal Start */
if ((paxel_cfg->h_start < iir_cfg->h_start) ||
IS_OUT_OF_BOUNDS(paxel_cfg->h_start,
OMAP3ISP_AF_PAXEL_HZSTART_MIN,
OMAP3ISP_AF_PAXEL_HZSTART_MAX))
return -EINVAL;
/* Check IIR */
for (index = 0; index < OMAP3ISP_AF_NUM_COEF; index++) {
if ((iir_cfg->coeff_set0[index]) > OMAP3ISP_AF_COEF_MAX)
return -EINVAL;
if ((iir_cfg->coeff_set1[index]) > OMAP3ISP_AF_COEF_MAX)
return -EINVAL;
}
if (IS_OUT_OF_BOUNDS(iir_cfg->h_start, OMAP3ISP_AF_IIRSH_MIN,
OMAP3ISP_AF_IIRSH_MAX))
return -EINVAL;
/* Hack: If paxel size is 12, the 10th AF window may be corrupted */
if ((paxel_cfg->h_cnt * paxel_cfg->v_cnt > 9) &&
(paxel_cfg->width * paxel_cfg->height == 12))
return -EINVAL;
buf_size = h3a_af_get_buf_size(user_cfg);
if (buf_size > user_cfg->buf_size)
/* User buf_size request wasn't enough */
user_cfg->buf_size = buf_size;
else if (user_cfg->buf_size > OMAP3ISP_AF_MAX_BUF_SIZE)
user_cfg->buf_size = OMAP3ISP_AF_MAX_BUF_SIZE;
return 0;
}
/* Update local parameters */
static void h3a_af_set_params(struct ispstat *af, void *new_conf)
{
struct omap3isp_h3a_af_config *user_cfg = new_conf;
struct omap3isp_h3a_af_config *cur_cfg = af->priv;
int update = 0;
int index;
/* alaw */
if (cur_cfg->alaw_enable != user_cfg->alaw_enable) {
update = 1;
goto out;
}
/* hmf */
if (cur_cfg->hmf.enable != user_cfg->hmf.enable) {
update = 1;
goto out;
}
if (cur_cfg->hmf.threshold != user_cfg->hmf.threshold) {
update = 1;
goto out;
}
/* rgbpos */
if (cur_cfg
|