// SPDX-License-Identifier: GPL-2.0-only
/* linux/drivers/media/platform/samsung/s5p-jpeg/jpeg-hw.h
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 *              http://www.samsung.com
 *
 * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
 */

#include <linux/io.h>
#include <linux/videodev2.h>

#include "jpeg-core.h"
#include "jpeg-regs.h"
#include "jpeg-hw-s5p.h"

void s5p_jpeg_reset(void __iomem *regs)
{
        unsigned long reg;

        writel(1, regs + S5P_JPG_SW_RESET);
        reg = readl(regs + S5P_JPG_SW_RESET);
        /* no other way but polling for when JPEG IP becomes operational */
        while (reg != 0) {
                cpu_relax();
                reg = readl(regs + S5P_JPG_SW_RESET);
        }
}

void s5p_jpeg_poweron(void __iomem *regs)
{
        writel(S5P_POWER_ON, regs + S5P_JPGCLKCON);
}

void s5p_jpeg_input_raw_mode(void __iomem *regs, unsigned long mode)
{
        unsigned long reg, m;

        m = S5P_MOD_SEL_565;
        if (mode == S5P_JPEG_RAW_IN_565)
                m = S5P_MOD_SEL_565;
        else if (mode == S5P_JPEG_RAW_IN_422)
                m = S5P_MOD_SEL_422;

        reg = readl(regs + S5P_JPGCMOD);
        reg &= ~S5P_MOD_SEL_MASK;
        reg |= m;
        writel(reg, regs + S5P_JPGCMOD);
}

void s5p_jpeg_proc_mode(void __iomem *regs, unsigned long mode)
{
        unsigned long reg, m;

        if (mode == S5P_JPEG_ENCODE)
                m = S5P_PROC_MODE_COMPR;
        else
                m = S5P_PROC_MODE_DECOMPR;
        reg = readl(regs + S5P_JPGMOD);
        reg &= ~S5P_PROC_MODE_MASK;
        reg |= m;
        writel(reg, regs + S5P_JPGMOD);
}

void s5p_jpeg_subsampling_mode(void __iomem *regs, unsigned int mode)
{
        unsigned long reg, m;

        if (mode == V4L2_JPEG_CHROMA_SUBSAMPLING_420)
                m = S5P_SUBSAMPLING_MODE_420;
        else
                m = S5P_SUBSAMPLING_MODE_422;

        reg = readl(regs + S5P_JPGMOD);
        reg &= ~S5P_SUBSAMPLING_MODE_MASK;
        reg |= m;
        writel(reg, regs + S5P_JPGMOD);
}

unsigned int s5p_jpeg_get_subsampling_mode(void __iomem *regs)
{
        return readl(regs + S5P_JPGMOD) & S5P_SUBSAMPLING_MODE_MASK;
}

void s5p_jpeg_dri(void __iomem *regs, unsigned int dri)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPGDRI_U);
        reg &= ~0xff;
        reg |= (dri >> 8) & 0xff;
        writel(reg, regs + S5P_JPGDRI_U);

        reg = readl(regs + S5P_JPGDRI_L);
        reg &= ~0xff;
        reg |= dri & 0xff;
        writel(reg, regs + S5P_JPGDRI_L);
}

void s5p_jpeg_qtbl(void __iomem *regs, unsigned int t, unsigned int n)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPG_QTBL);
        reg &= ~S5P_QT_NUMt_MASK(t);
        reg |= (n << S5P_QT_NUMt_SHIFT(t)) & S5P_QT_NUMt_MASK(t);
        writel(reg, regs + S5P_JPG_QTBL);
}

void s5p_jpeg_htbl_ac(void __iomem *regs, unsigned int t)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPG_HTBL);
        reg &= ~S5P_HT_NUMt_AC_MASK(t);
        /* this driver uses table 0 for all color components */
        reg |= (0 << S5P_HT_NUMt_AC_SHIFT(t)) & S5P_HT_NUMt_AC_MASK(t);
        writel(reg, regs + S5P_JPG_HTBL);
}

void s5p_jpeg_htbl_dc(void __iomem *regs, unsigned int t)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPG_HTBL);
        reg &= ~S5P_HT_NUMt_DC_MASK(t);
        /* this driver uses table 0 for all color components */
        reg |= (0 << S5P_HT_NUMt_DC_SHIFT(t)) & S5P_HT_NUMt_DC_MASK(t);
        writel(reg, regs + S5P_JPG_HTBL);
}

void s5p_jpeg_y(void __iomem *regs, unsigned int y)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPGY_U);
        reg &= ~0xff;
        reg |= (y >> 8) & 0xff;
        writel(reg, regs + S5P_JPGY_U);

        reg = readl(regs + S5P_JPGY_L);
        reg &= ~0xff;
        reg |= y & 0xff;
        writel(reg, regs + S5P_JPGY_L);
}

void s5p_jpeg_x(void __iomem *regs, unsigned int x)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPGX_U);
        reg &= ~0xff;
        reg |= (x >> 8) & 0xff;
        writel(reg, regs + S5P_JPGX_U);

        reg = readl(regs + S5P_JPGX_L);
        reg &= ~0xff;
        reg |= x & 0xff;
        writel(reg, regs + S5P_JPGX_L);
}

void s5p_jpeg_rst_int_enable(void __iomem *regs, bool enable)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPGINTSE);
        reg &= ~S5P_RSTm_INT_EN_MASK;
        if (enable)
                reg |= S5P_RSTm_INT_EN;
        writel(reg, regs + S5P_JPGINTSE);
}

void s5p_jpeg_data_num_int_enable(void __iomem *regs, bool enable)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPGINTSE);
        reg &= ~S5P_DATA_NUM_INT_EN_MASK;
        if (enable)
                reg |= S5P_DATA_NUM_INT_EN;
        writel(reg, regs + S5P_JPGINTSE);
}

void s5p_jpeg_final_mcu_num_int_enable(void __iomem *regs, bool enbl)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPGINTSE);
        reg &= ~S5P_FINAL_MCU_NUM_INT_EN_MASK;
        if (enbl)
                reg |= S5P_FINAL_MCU_NUM_INT_EN;
        writel(reg, regs + S5P_JPGINTSE);
}

int s5p_jpeg_timer_stat(void __iomem *regs)
{
        return (int)((readl(regs + S5P_JPG_TIMER_ST) & S5P_TIMER_INT_STAT_MASK)
                     >> S5P_TIMER_INT_STAT_SHIFT);
}

void s5p_jpeg_clear_timer_stat(void __iomem *regs)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPG_TIMER_SE);
        reg &= ~S5P_TIMER_INT_STAT_MASK;
        writel(reg, regs + S5P_JPG_TIMER_SE);
}

void s5p_jpeg_enc_stream_int(void __iomem *regs, unsigned long size)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPG_ENC_STREAM_INTSE);
        reg &= ~S5P_ENC_STREAM_BOUND_MASK;
        reg |= S5P_ENC_STREAM_INT_EN;
        reg |= size & S5P_ENC_STREAM_BOUND_MASK;
        writel(reg, regs + S5P_JPG_ENC_STREAM_INTSE);
}

int s5p_jpeg_enc_stream_stat(void __iomem *regs)
{
        return (int)(readl(regs + S5P_JPG_ENC_STREAM_INTST) &
                     S5P_ENC_STREAM_INT_STAT_MASK);
}

void s5p_jpeg_clear_enc_stream_stat(void __iomem *regs)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPG_ENC_STREAM_INTSE);
        reg &= ~S5P_ENC_STREAM_INT_MASK;
        writel(reg, regs + S5P_JPG_ENC_STREAM_INTSE);
}

void s5p_jpeg_outform_raw(void __iomem *regs, unsigned long format)
{
        unsigned long reg, f;

        f = S5P_DEC_OUT_FORMAT_422;
        if (format == S5P_JPEG_RAW_OUT_422)
                f = S5P_DEC_OUT_FORMAT_422;
        else if (format == S5P_JPEG_RAW_OUT_420)
                f = S5P_DEC_OUT_FORMAT_420;
        reg = readl(regs + S5P_JPG_OUTFORM);
        reg &= ~S5P_DEC_OUT_FORMAT_MASK;
        reg |= f;
        writel(reg, regs + S5P_JPG_OUTFORM);
}

void s5p_jpeg_jpgadr(void __iomem *regs, unsigned long addr)
{
        writel(addr, regs + S5P_JPG_JPGADR);
}

void s5p_jpeg_imgadr(void __iomem *regs, unsigned long addr)
{
        writel(addr, regs + S5P_JPG_IMGADR);
}

void s5p_jpeg_coef(void __iomem *regs, unsigned int i,
                             unsigned int j, unsigned int coef)
{
        unsigned long reg;

        reg = readl(regs + S5P_JPG_COEF(i));
        reg &= ~S5P_COEFn_MASK(j);
        reg |= (coef << S5P_COEFn_SHIFT(j)) & S5P_COEFn_MASK(j);
        writel(reg, regs + S5P_JPG_COEF(i));
}

void s5p_jpeg_start(void __iomem *regs)
{
        writel(1, regs + S5P_JSTART);
}

int s5p_jpeg_result_stat_ok(void __iomem *regs)
{
        return (int)((readl(regs + S5P_JPGINTST) & S5P_RESULT_STAT_MASK)
                     >> S5P_RESULT_STAT_SHIFT);
}

int s5p_jpeg_stream_stat_ok(void __iomem *regs)
{
        return !(int)((readl(regs + S5P_JPGINTST) & S5P_STREAM_STAT_MASK)
                      >> S5P_STREAM_STAT_SHIFT);
}

void s5p_jpeg_clear_int(void __iomem *regs)
{
        readl(regs + S5P_JPGINTST);
        writel(S5P_INT_RELEASE, regs + S5P_JPGCOM);
        readl(regs + S5P_JPGOPR);
}

unsigned int s5p_jpeg_compressed_size(void __iomem *regs)
{
        unsigned long jpeg_size = 0;

        jpeg_size |= (readl(regs + S5P_JPGCNT_U) & 0xff) << 16;
        jpeg_size |= (readl(regs + S5P_JPGCNT_M) & 0xff) << 8;
        jpeg_size |= (readl(regs + S5P_JPGCNT_L) & 0xff);

        return (unsigned int)jpeg_size;
}