// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Coda multi-standard codec IP
 *
 * Copyright (C) 2014 Philipp Zabel, Pengutronix
 */

#include <linux/bitops.h>
#include "coda.h"

#define XY2_INVERT      BIT(7)
#define XY2_ZERO        BIT(6)
#define XY2_TB_XOR      BIT(5)
#define XY2_XYSEL       BIT(4)
#define XY2_Y           (1 << 4)
#define XY2_X           (0 << 4)

#define XY2(luma_sel, luma_bit, chroma_sel, chroma_bit) \
        (((XY2_##luma_sel) | (luma_bit)) << 8 | \
         (XY2_##chroma_sel) | (chroma_bit))

static const u16 xy2ca_zero_map[16] = {
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
};

static const u16 xy2ca_tiled_map[16] = {
        XY2(Y,    0, Y,    0),
        XY2(Y,    1, Y,    1),
        XY2(Y,    2, Y,    2),
        XY2(Y,    3, X,    3),
        XY2(X,    3, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
        XY2(ZERO, 0, ZERO, 0),
};

/*
 * RA[15:0], CA[15:8] are hardwired to contain the 24-bit macroblock
 * start offset (macroblock size is 16x16 for luma, 16x8 for chroma).
 * Bits CA[4:0] are set using XY2CA above. BA[3:0] seems to be unused.
 */

#define RBC_CA          (0 << 4)
#define RBC_BA          (1 << 4)
#define RBC_RA          (2 << 4)
#define RBC_ZERO        (3 << 4)

#define RBC(luma_sel, luma_bit, chroma_sel, chroma_bit) \
        (((RBC_##luma_sel) | (luma_bit)) << 6 | \
         (RBC_##chroma_sel) | (chroma_bit))

static const u16 rbc2axi_tiled_map[32] = {
        RBC(ZERO, 0, ZERO, 0),
        RBC(ZERO, 0, ZERO, 0),
        RBC(ZERO, 0, ZERO, 0),
        RBC(CA,   0, CA,   0),
        RBC(CA,   1, CA,   1),
        RBC(CA,   2, CA,   2),
        RBC(CA,   3, CA,   3),
        RBC(CA,   4, CA,   8),
        RBC(CA,   8, CA,   9),
        RBC(CA,   9, CA,  10),
        RBC(CA,  10, CA,  11),
        RBC(CA,  11, CA,  12),
        RBC(CA,  12, CA,  13),
        RBC(CA,  13, CA,  14),
        RBC(CA,  14, CA,  15),
        RBC(CA,  15, RA,   0),
        RBC(RA,   0, RA,   1),
        RBC(RA,   1, RA,   2),
        RBC(RA,   2, RA,   3),
        RBC(RA,   3, RA,   4),
        RBC(RA,   4, RA,   5),
        RBC(RA,   5, RA,   6),
        RBC(RA,   6, RA,   7),
        RBC(RA,   7, RA,   8),
        RBC(RA,   8, RA,   9),
        RBC(RA,   9, RA,  10),
        RBC(RA,  10, RA,  11),
        RBC(RA,  11, RA,  12),
        RBC(RA,  12, RA,  13),
        RBC(RA,  13, RA,  14),
        RBC(RA,  14, RA,  15),
        RBC(RA,  15, ZERO, 0),
};

void coda_set_gdi_regs(struct coda_ctx *ctx)
{
        struct coda_dev *dev = ctx->dev;
        const u16 *xy2ca_map;
        u32 xy2rbc_config;
        int i;

        switch (ctx->tiled_map_type) {
        case GDI_LINEAR_FRAME_MAP:
        default:
                xy2ca_map = xy2ca_zero_map;
                xy2rbc_config = 0;
                break;
        case GDI_TILED_FRAME_MB_RASTER_MAP:
                xy2ca_map = xy2ca_tiled_map;
                xy2rbc_config = CODA9_XY2RBC_TILED_MAP |
                                CODA9_XY2RBC_CA_INC_HOR |
                                (16 - 1) << 12 | (8 - 1) << 4;
                break;
        }

        for (i = 0; i < 16; i++)
                coda_write(dev, xy2ca_map[i],
                                CODA9_GDI_XY2_CAS_0 + 4 * i);
        for (i = 0; i < 4; i++)
                coda_write(dev, XY2(ZERO, 0, ZERO, 0),
                                CODA9_GDI_XY2_BA_0 + 4 * i);
        for (i = 0; i < 16; i++)
                coda_write(dev, XY2(ZERO, 0, ZERO, 0),
                                CODA9_GDI_XY2_RAS_0 + 4 * i);
        coda_write(dev, xy2rbc_config, CODA9_GDI_XY2_RBC_CONFIG);
        if (xy2rbc_config) {
                for (i = 0; i < 32; i++)
                        coda_write(dev, rbc2axi_tiled_map[i],
                                        CODA9_GDI_RBC2_AXI_0 + 4 * i);
        }
}