// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2012-2016 Mentor Graphics Inc.
 * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
 */
#include <linux/io.h>
#include "ipu-prv.h"

struct ipu_vdi {
        void __iomem *base;
        u32 module;
        spinlock_t lock;
        int use_count;
        struct ipu_soc *ipu;
};


/* VDI Register Offsets */
#define VDI_FSIZE 0x0000
#define VDI_C     0x0004

/* VDI Register Fields */
#define VDI_C_CH_420             (0 << 1)
#define VDI_C_CH_422             (1 << 1)
#define VDI_C_MOT_SEL_MASK       (0x3 << 2)
#define VDI_C_MOT_SEL_FULL       (2 << 2)
#define VDI_C_MOT_SEL_LOW        (1 << 2)
#define VDI_C_MOT_SEL_MED        (0 << 2)
#define VDI_C_BURST_SIZE1_4      (3 << 4)
#define VDI_C_BURST_SIZE2_4      (3 << 8)
#define VDI_C_BURST_SIZE3_4      (3 << 12)
#define VDI_C_BURST_SIZE_MASK    0xF
#define VDI_C_BURST_SIZE1_OFFSET 4
#define VDI_C_BURST_SIZE2_OFFSET 8
#define VDI_C_BURST_SIZE3_OFFSET 12
#define VDI_C_VWM1_SET_1         (0 << 16)
#define VDI_C_VWM1_SET_2         (1 << 16)
#define VDI_C_VWM1_CLR_2         (1 << 19)
#define VDI_C_VWM3_SET_1         (0 << 22)
#define VDI_C_VWM3_SET_2         (1 << 22)
#define VDI_C_VWM3_CLR_2         (1 << 25)
#define VDI_C_TOP_FIELD_MAN_1    (1 << 30)
#define VDI_C_TOP_FIELD_AUTO_1   (1 << 31)

static inline u32 ipu_vdi_read(struct ipu_vdi *vdi, unsigned int offset)
{
        return readl(vdi->base + offset);
}

static inline void ipu_vdi_write(struct ipu_vdi *vdi, u32 value,
                                 unsigned int offset)
{
        writel(value, vdi->base + offset);
}

void ipu_vdi_set_field_order(struct ipu_vdi *vdi, v4l2_std_id std, u32 field)
{
        bool top_field_0 = false;
        unsigned long flags;
        u32 reg;

        switch (field) {
        case V4L2_FIELD_INTERLACED_TB:
        case V4L2_FIELD_SEQ_TB:
        case V4L2_FIELD_TOP:
                top_field_0 = true;
                break;
        case V4L2_FIELD_INTERLACED_BT:
        case V4L2_FIELD_SEQ_BT:
        case V4L2_FIELD_BOTTOM:
                top_field_0 = false;
                break;
        default:
                top_field_0 = (std & V4L2_STD_525_60) ? true : false;
                break;
        }

        spin_lock_irqsave(&vdi->lock, flags);

        reg = ipu_vdi_read(vdi, VDI_C);
        if (top_field_0)
                reg &= ~(VDI_C_TOP_FIELD_MAN_1 | VDI_C_TOP_FIELD_AUTO_1);
        else
                reg |= VDI_C_TOP_FIELD_MAN_1 | VDI_C_TOP_FIELD_AUTO_1;
        ipu_vdi_write(vdi, reg, VDI_C);

        spin_unlock_irqrestore(&vdi->lock, flags);
}
EXPORT_SYMBOL_GPL(ipu_vdi_set_field_order);

void ipu_vdi_set_motion(struct ipu_vdi *vdi, enum ipu_motion_sel motion_sel)
{
        unsigned long flags;
        u32 reg;

        spin_lock_irqsave(&vdi->lock, flags);

        reg = ipu_vdi_read(vdi, VDI_C);

        reg &= ~VDI_C_MOT_SEL_MASK;

        switch (motion_sel) {
        case MED_MOTION:
                reg |= VDI_C_MOT_SEL_MED;
                break;
        case HIGH_MOTION:
                reg |= VDI_C_MOT_SEL_FULL;
                break;
        default:
                reg |= VDI_C_MOT_SEL_LOW;
                break;
        }

        ipu_vdi_write(vdi, reg, VDI_C);

        spin_unlock_irqrestore(&vdi->lock, flags);
}
EXPORT_SYMBOL_GPL(ipu_vdi_set_motion);

void ipu_vdi_setup(struct ipu_vdi *vdi, u32 code, int xres, int yres)
{
        unsigned long flags;
        u32 pixel_fmt, reg;

        spin_lock_irqsave(&vdi->lock, flags);

        reg = ((yres - 1) << 16) | (xres - 1);
        ipu_vdi_write(vdi, reg, VDI_FSIZE);

        /*
         * Full motion, only vertical filter is used.
         * Burst size is 4 accesses
         */
        if (code == MEDIA_BUS_FMT_UYVY8_2X8 ||
            code == MEDIA_BUS_FMT_UYVY8_1X16 ||
            code == MEDIA_BUS_FMT_YUYV8_2X8 ||
            code == MEDIA_BUS_FMT_YUYV8_1X16)
                pixel_fmt = VDI_C_CH_422;
        else
                pixel_fmt = VDI_C_CH_420;

        reg = ipu_vdi_read(vdi, VDI_C);
        reg |= pixel_fmt;
        reg |= VDI_C_BURST_SIZE2_4;
        reg |= VDI_C_BURST_SIZE1_4 | VDI_C_VWM1_CLR_2;
        reg |= VDI_C_BURST_SIZE3_4 | VDI_C_VWM3_CLR_2;
        ipu_vdi_write(vdi, reg, VDI_C);

        spin_unlock_irqrestore(&vdi->lock, flags);
}
EXPORT_SYMBOL_GPL(ipu_vdi_setup);

int ipu_vdi_enable(struct ipu_vdi *vdi)
{
        unsigned long flags;

        spin_lock_irqsave(&vdi->lock, flags);

        if (!vdi->use_count)
                ipu_module_enable(vdi->ipu, vdi->module);

        vdi->use_count++;

        spin_unlock_irqrestore(&vdi->lock, flags);

        return 0;
}
EXPORT_SYMBOL_GPL(ipu_vdi_enable);

int ipu_vdi_disable(struct ipu_vdi *vdi)
{
        unsigned long flags;

        spin_lock_irqsave(&vdi->lock, flags);

        if (vdi->use_count) {
                if (!--vdi->use_count)
                        ipu_module_disable(vdi->ipu, vdi->module);
        }

        spin_unlock_irqrestore(&vdi->lock, flags);

        return 0;
}
EXPORT_SYMBOL_GPL(ipu_vdi_disable);

struct ipu_vdi *ipu_vdi_get(struct ipu_soc *ipu)
{
        return ipu->vdi_priv;
}
EXPORT_SYMBOL_GPL(ipu_vdi_get);

void ipu_vdi_put(struct ipu_vdi *vdi)
{
}
EXPORT_SYMBOL_GPL(ipu_vdi_put);

int ipu_vdi_init(struct ipu_soc *ipu, struct device *dev,
                 unsigned long base, u32 module)
{
        struct ipu_vdi *vdi;

        vdi = devm_kzalloc(dev, sizeof(*vdi), GFP_KERNEL);
        if (!vdi)
                return -ENOMEM;

        ipu->vdi_priv = vdi;

        spin_lock_init(&vdi->lock);
        vdi->module = module;
        vdi->base = devm_ioremap(dev, base, PAGE_SIZE);
        if (!vdi->base)
                return -ENOMEM;

        dev_dbg(dev, "VDI base: 0x%08lx remapped to %p\n", base, vdi->base);
        vdi->ipu = ipu;

        return 0;
}

void ipu_vdi_exit(struct ipu_soc *ipu)
{
}