jpeg-hw.h

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/* linux/drivers/media/platform/s5p-jpeg/jpeg-hw.h
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 *      http://www.samsung.com
 *
 * Author: Andrzej Pietrasiewicz <[email protected]>
 *
 * 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.
 */
#ifndef JPEG_HW_H_
#define JPEG_HW_H_

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

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

#define S5P_JPEG_MIN_WIDTH      32
#define S5P_JPEG_MIN_HEIGHT     32
#define S5P_JPEG_MAX_WIDTH      8192
#define S5P_JPEG_MAX_HEIGHT     8192
#define S5P_JPEG_ENCODE         0
#define S5P_JPEG_DECODE         1
#define S5P_JPEG_RAW_IN_565     0
#define S5P_JPEG_RAW_IN_422     1
#define S5P_JPEG_RAW_OUT_422        0
#define S5P_JPEG_RAW_OUT_420        1

static inline void 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);
    }
}

static inline void jpeg_poweron(void __iomem *regs)
{
    writel(S5P_POWER_ON, regs + S5P_JPGCLKCON);
}

static inline void 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);
}

static inline void jpeg_input_raw_y16(void __iomem *regs, bool y16)
{
    unsigned long reg;

    reg = readl(regs + S5P_JPGCMOD);
    if (y16)
        reg |= S5P_MODE_Y16;
    else
        reg &= ~S5P_MODE_Y16_MASK;
    writel(reg, regs + S5P_JPGCMOD);
}

static inline void jpeg_proc_mode(void __iomem *regs, unsigned long mode)
{
    unsigned long reg, m;

    m = S5P_PROC_MODE_DECOMPR;
    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);
}

static inline void 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);
}

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

static inline void 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);
}

static inline void 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);
}

static inline void 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);
}

static inline void 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);
}

static inline void 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);
}

static inline void 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);
}

static inline void 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);
}

static inline void 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);
}

static inline void 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);
}

static inline void jpeg_timer_enable(void __iomem *regs, unsigned long val)
{
    unsigned long reg;

    reg = readl(regs + S5P_JPG_TIMER_SE);
    reg |= S5P_TIMER_INT_EN;
    reg &= ~S5P_TIMER_INIT_MASK;
    reg |= val & S5P_TIMER_INIT_MASK;
    writel(reg, regs + S5P_JPG_TIMER_SE);
}

static inline void jpeg_timer_disable(void __iomem *regs)
{
    unsigned long reg;

    reg = readl(regs + S5P_JPG_TIMER_SE);
    reg &= ~S5P_TIMER_INT_EN_MASK;
    writel(reg, regs + S5P_JPG_TIMER_SE);
}

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

static inline void 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);
}

static inline void 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);
}

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

static inline void 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);
}

static inline void 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);
}

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

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

static inline void 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));
}

static inline void jpeg_start(void __iomem *regs)
{
    writel(1, regs + S5P_JSTART);
}

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

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

static inline void jpeg_clear_int(void __iomem *regs)
{
    unsigned long reg;

    reg = readl(regs + S5P_JPGINTST);
    writel(S5P_INT_RELEASE, regs + S5P_JPGCOM);
    reg = readl(regs + S5P_JPGOPR);
}

static inline unsigned int 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;
}

#endif /* JPEG_HW_H_ */