Archipelago » qemu

/*

 * Samsung exynos4210 Display Controller (FIMD)

 *

 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.

 * All rights reserved.

 * Based on LCD controller for Samsung S5PC1xx-based board emulation

 * by Kirill Batuzov <batuzovk@ispras.ru>

 *

 * Contributed by Mitsyanko Igor <i.mitsyanko@samsung.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the

 * Free Software Foundation; either version 2 of the License, or (at your

 * option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 * See the GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, see <http://www.gnu.org/licenses/>.

 */

#include "qemu-common.h"

#include "cpu-all.h"

#include "sysbus.h"

#include "console.h"

#include "pixel_ops.h"

#include "bswap.h"

/* Debug messages configuration */

#define EXYNOS4210_FIMD_DEBUG              0

#define EXYNOS4210_FIMD_MODE_TRACE         0

#if EXYNOS4210_FIMD_DEBUG == 0

    #define DPRINT_L1(fmt, args...)       do { } while (0)

    #define DPRINT_L2(fmt, args...)       do { } while (0)

    #define DPRINT_ERROR(fmt, args...)    do { } while (0)

#elif EXYNOS4210_FIMD_DEBUG == 1

    #define DPRINT_L1(fmt, args...) \

        do {fprintf(stderr, "QEMU FIMD: "fmt, ## args); } while (0)

    #define DPRINT_L2(fmt, args...)       do { } while (0)

    #define DPRINT_ERROR(fmt, args...)  \

        do {fprintf(stderr, "QEMU FIMD ERROR: "fmt, ## args); } while (0)

#else

    #define DPRINT_L1(fmt, args...) \

        do {fprintf(stderr, "QEMU FIMD: "fmt, ## args); } while (0)

    #define DPRINT_L2(fmt, args...) \

        do {fprintf(stderr, "QEMU FIMD: "fmt, ## args); } while (0)

    #define DPRINT_ERROR(fmt, args...)  \

        do {fprintf(stderr, "QEMU FIMD ERROR: "fmt, ## args); } while (0)

#endif

#if EXYNOS4210_FIMD_MODE_TRACE == 0

    #define DPRINT_TRACE(fmt, args...)        do { } while (0)

#else

    #define DPRINT_TRACE(fmt, args...)        \

        do {fprintf(stderr, "QEMU FIMD: "fmt, ## args); } while (0)

#endif

#define NUM_OF_WINDOWS              5

#define FIMD_REGS_SIZE              0x4114

/* Video main control registers */

#define FIMD_VIDCON0                0x0000

#define FIMD_VIDCON1                0x0004

#define FIMD_VIDCON2                0x0008

#define FIMD_VIDCON3                0x000C

#define FIMD_VIDCON0_ENVID_F        (1 << 0)

#define FIMD_VIDCON0_ENVID          (1 << 1)

#define FIMD_VIDCON0_ENVID_MASK     ((1 << 0) | (1 << 1))

#define FIMD_VIDCON1_ROMASK         0x07FFE000

/* Video time control registers */

#define FIMD_VIDTCON_START          0x10

#define FIMD_VIDTCON_END            0x1C

#define FIMD_VIDTCON2_SIZE_MASK     0x07FF

#define FIMD_VIDTCON2_HOR_SHIFT     0

#define FIMD_VIDTCON2_VER_SHIFT     11

/* Window control registers */

#define FIMD_WINCON_START           0x0020

#define FIMD_WINCON_END             0x0030

#define FIMD_WINCON_ROMASK          0x82200000

#define FIMD_WINCON_ENWIN           (1 << 0)

#define FIMD_WINCON_BLD_PIX         (1 << 6)

#define FIMD_WINCON_ALPHA_MUL       (1 << 7)

#define FIMD_WINCON_ALPHA_SEL       (1 << 1)

#define FIMD_WINCON_SWAP            0x078000

#define FIMD_WINCON_SWAP_SHIFT      15

#define FIMD_WINCON_SWAP_WORD       0x1

#define FIMD_WINCON_SWAP_HWORD      0x2

#define FIMD_WINCON_SWAP_BYTE       0x4

#define FIMD_WINCON_SWAP_BITS       0x8

#define FIMD_WINCON_BUFSTAT_L       (1 << 21)

#define FIMD_WINCON_BUFSTAT_H       (1 << 31)

#define FIMD_WINCON_BUFSTATUS       ((1 << 21) | (1 << 31))

#define FIMD_WINCON_BUF0_STAT       ((0 << 21) | (0 << 31))

#define FIMD_WINCON_BUF1_STAT       ((1 << 21) | (0 << 31))

#define FIMD_WINCON_BUF2_STAT       ((0 << 21) | (1 << 31))

#define FIMD_WINCON_BUFSELECT       ((1 << 20) | (1 << 30))

#define FIMD_WINCON_BUF0_SEL        ((0 << 20) | (0 << 30))

#define FIMD_WINCON_BUF1_SEL        ((1 << 20) | (0 << 30))

#define FIMD_WINCON_BUF2_SEL        ((0 << 20) | (1 << 30))

#define FIMD_WINCON_BUFMODE         (1 << 14)

#define IS_PALETTIZED_MODE(w)       (w->wincon & 0xC)

#define PAL_MODE_WITH_ALPHA(x)       ((x) == 7)

#define WIN_BPP_MODE(w)             ((w->wincon >> 2) & 0xF)

#define WIN_BPP_MODE_WITH_ALPHA(w)     \

    (WIN_BPP_MODE(w) == 0xD || WIN_BPP_MODE(w) == 0xE)

/* Shadow control register */

#define FIMD_SHADOWCON              0x0034

#define FIMD_WINDOW_PROTECTED(s, w) ((s) & (1 << (10 + (w))))

/* Channel mapping control register */

#define FIMD_WINCHMAP               0x003C

/* Window position control registers */

#define FIMD_VIDOSD_START           0x0040

#define FIMD_VIDOSD_END             0x0088

#define FIMD_VIDOSD_COORD_MASK      0x07FF

#define FIMD_VIDOSD_HOR_SHIFT       11

#define FIMD_VIDOSD_VER_SHIFT       0

#define FIMD_VIDOSD_ALPHA_AEN0      0xFFF000

#define FIMD_VIDOSD_AEN0_SHIFT      12

#define FIMD_VIDOSD_ALPHA_AEN1      0x000FFF

/* Frame buffer address registers */

#define FIMD_VIDWADD0_START         0x00A0

#define FIMD_VIDWADD0_END           0x00C4

#define FIMD_VIDWADD0_END           0x00C4

#define FIMD_VIDWADD1_START         0x00D0

#define FIMD_VIDWADD1_END           0x00F4

#define FIMD_VIDWADD2_START         0x0100

#define FIMD_VIDWADD2_END           0x0110

#define FIMD_VIDWADD2_PAGEWIDTH     0x1FFF

#define FIMD_VIDWADD2_OFFSIZE       0x1FFF

#define FIMD_VIDWADD2_OFFSIZE_SHIFT 13

#define FIMD_VIDW0ADD0_B2           0x20A0

#define FIMD_VIDW4ADD0_B2           0x20C0

/* Video interrupt control registers */

#define FIMD_VIDINTCON0             0x130

#define FIMD_VIDINTCON1             0x134

/* Window color key registers */

#define FIMD_WKEYCON_START          0x140

#define FIMD_WKEYCON_END            0x15C

#define FIMD_WKEYCON0_COMPKEY       0x00FFFFFF

#define FIMD_WKEYCON0_CTL_SHIFT     24

#define FIMD_WKEYCON0_DIRCON        (1 << 24)

#define FIMD_WKEYCON0_KEYEN         (1 << 25)

#define FIMD_WKEYCON0_KEYBLEN       (1 << 26)

/* Window color key alpha control register */

#define FIMD_WKEYALPHA_START        0x160

#define FIMD_WKEYALPHA_END          0x16C

/* Dithering control register */

#define FIMD_DITHMODE               0x170

/* Window alpha control registers */

#define FIMD_VIDALPHA_ALPHA_LOWER   0x000F0F0F

#define FIMD_VIDALPHA_ALPHA_UPPER   0x00F0F0F0

#define FIMD_VIDWALPHA_START        0x21C

#define FIMD_VIDWALPHA_END          0x240

/* Window color map registers */

#define FIMD_WINMAP_START           0x180

#define FIMD_WINMAP_END             0x190

#define FIMD_WINMAP_EN              (1 << 24)

#define FIMD_WINMAP_COLOR_MASK      0x00FFFFFF

/* Window palette control registers */

#define FIMD_WPALCON_HIGH           0x019C

#define FIMD_WPALCON_LOW            0x01A0

#define FIMD_WPALCON_UPDATEEN       (1 << 9)

#define FIMD_WPAL_W0PAL_L           0x07

#define FIMD_WPAL_W0PAL_L_SHT        0

#define FIMD_WPAL_W1PAL_L           0x07

#define FIMD_WPAL_W1PAL_L_SHT       3

#define FIMD_WPAL_W2PAL_L           0x01

#define FIMD_WPAL_W2PAL_L_SHT       6

#define FIMD_WPAL_W2PAL_H           0x06

#define FIMD_WPAL_W2PAL_H_SHT       8

#define FIMD_WPAL_W3PAL_L           0x01

#define FIMD_WPAL_W3PAL_L_SHT       7

#define FIMD_WPAL_W3PAL_H           0x06

#define FIMD_WPAL_W3PAL_H_SHT       12

#define FIMD_WPAL_W4PAL_L           0x01

#define FIMD_WPAL_W4PAL_L_SHT       8

#define FIMD_WPAL_W4PAL_H           0x06

#define FIMD_WPAL_W4PAL_H_SHT       16

/* Trigger control registers */

#define FIMD_TRIGCON                0x01A4

#define FIMD_TRIGCON_ROMASK         0x00000004

/* LCD I80 Interface Control */

#define FIMD_I80IFCON_START         0x01B0

#define FIMD_I80IFCON_END           0x01BC

/* Color gain control register */

#define FIMD_COLORGAINCON           0x01C0

/* LCD i80 Interface Command Control */

#define FIMD_LDI_CMDCON0            0x01D0

#define FIMD_LDI_CMDCON1            0x01D4

/* I80 System Interface Manual Command Control */

#define FIMD_SIFCCON0               0x01E0

#define FIMD_SIFCCON2               0x01E8

/* Hue Control Registers */

#define FIMD_HUECOEFCR_START        0x01EC

#define FIMD_HUECOEFCR_END          0x01F4

#define FIMD_HUECOEFCB_START        0x01FC

#define FIMD_HUECOEFCB_END          0x0208

#define FIMD_HUEOFFSET              0x020C

/* Video interrupt control registers */

#define FIMD_VIDINT_INTFIFOPEND     (1 << 0)

#define FIMD_VIDINT_INTFRMPEND      (1 << 1)

#define FIMD_VIDINT_INTI80PEND      (1 << 2)

#define FIMD_VIDINT_INTEN           (1 << 0)

#define FIMD_VIDINT_INTFIFOEN       (1 << 1)

#define FIMD_VIDINT_INTFRMEN        (1 << 12)

#define FIMD_VIDINT_I80IFDONE       (1 << 17)

/* Window blend equation control registers */

#define FIMD_BLENDEQ_START          0x0244

#define FIMD_BLENDEQ_END            0x0250

#define FIMD_BLENDCON               0x0260

#define FIMD_ALPHA_8BIT             (1 << 0)

#define FIMD_BLENDEQ_COEF_MASK      0xF

/* Window RTQOS Control Registers */

#define FIMD_WRTQOSCON_START        0x0264

#define FIMD_WRTQOSCON_END          0x0274

/* LCD I80 Interface Command */

#define FIMD_I80IFCMD_START         0x0280

#define FIMD_I80IFCMD_END           0x02AC

/* Shadow windows control registers */

#define FIMD_SHD_ADD0_START         0x40A0

#define FIMD_SHD_ADD0_END           0x40C0

#define FIMD_SHD_ADD1_START         0x40D0

#define FIMD_SHD_ADD1_END           0x40F0

#define FIMD_SHD_ADD2_START         0x4100

#define FIMD_SHD_ADD2_END           0x4110

/* Palette memory */

#define FIMD_PAL_MEM_START          0x2400

#define FIMD_PAL_MEM_END            0x37FC

/* Palette memory aliases for windows 0 and 1 */

#define FIMD_PALMEM_AL_START        0x0400

#define FIMD_PALMEM_AL_END          0x0BFC

typedef struct {

    uint8_t r, g, b;

    /* D[31..24]dummy, D[23..16]rAlpha, D[15..8]gAlpha, D[7..0]bAlpha */

    uint32_t a;

} rgba;

#define RGBA_SIZE  7

typedef void pixel_to_rgb_func(uint32_t pixel, rgba *p);

typedef struct Exynos4210fimdWindow Exynos4210fimdWindow;

struct Exynos4210fimdWindow {

    uint32_t wincon;        /* Window control register */

    uint32_t buf_start[3];  /* Start address for video frame buffer */

    uint32_t buf_end[3];    /* End address for video frame buffer */

    uint32_t keycon[2];     /* Window color key registers */

    uint32_t keyalpha;      /* Color key alpha control register */

    uint32_t winmap;        /* Window color map register */

    uint32_t blendeq;       /* Window blending equation control register */

    uint32_t rtqoscon;      /* Window RTQOS Control Registers */

    uint32_t palette[256];  /* Palette RAM */

    uint32_t shadow_buf_start;      /* Start address of shadow frame buffer */

    uint32_t shadow_buf_end;        /* End address of shadow frame buffer */

    uint32_t shadow_buf_size;       /* Virtual shadow screen width */

    pixel_to_rgb_func *pixel_to_rgb;

    void (*draw_line)(Exynos4210fimdWindow *w, uint8_t *src, uint8_t *dst,

            bool blend);

    uint32_t (*get_alpha)(Exynos4210fimdWindow *w, uint32_t pix_a);

    uint16_t lefttop_x, lefttop_y;   /* VIDOSD0 register */

    uint16_t rightbot_x, rightbot_y; /* VIDOSD1 register */

    uint32_t osdsize;                /* VIDOSD2&3 register */

    uint32_t alpha_val[2];           /* VIDOSD2&3, VIDWALPHA registers */

    uint16_t virtpage_width;         /* VIDWADD2 register */

    uint16_t virtpage_offsize;       /* VIDWADD2 register */

    MemoryRegionSection mem_section; /* RAM fragment containing framebuffer */

    uint8_t *host_fb_addr;           /* Host pointer to window's framebuffer */

    target_phys_addr_t fb_len;       /* Framebuffer length */

};

typedef struct {

    SysBusDevice busdev;

    MemoryRegion iomem;

    DisplayState *console;

    qemu_irq irq[3];

    uint32_t vidcon[4];     /* Video main control registers 0-3 */

    uint32_t vidtcon[4];    /* Video time control registers 0-3 */

    uint32_t shadowcon;     /* Window shadow control register */

    uint32_t winchmap;      /* Channel mapping control register */

    uint32_t vidintcon[2];  /* Video interrupt control registers */

    uint32_t dithmode;      /* Dithering control register */

    uint32_t wpalcon[2];    /* Window palette control registers */

    uint32_t trigcon;       /* Trigger control register */

    uint32_t i80ifcon[4];   /* I80 interface control registers */

    uint32_t colorgaincon;  /* Color gain control register */

    uint32_t ldi_cmdcon[2]; /* LCD I80 interface command control */

    uint32_t sifccon[3];    /* I80 System Interface Manual Command Control */

    uint32_t huecoef_cr[4]; /* Hue control registers */

    uint32_t huecoef_cb[4]; /* Hue control registers */

    uint32_t hueoffset;     /* Hue offset control register */

    uint32_t blendcon;      /* Blending control register */

    uint32_t i80ifcmd[12];  /* LCD I80 Interface Command */

    Exynos4210fimdWindow window[5];    /* Window-specific registers */

    uint8_t *ifb;           /* Internal frame buffer */

    bool invalidate;        /* Image needs to be redrawn */

    bool enabled;           /* Display controller is enabled */

} Exynos4210fimdState;

/* Perform byte/halfword/word swap of data according to WINCON */

static inline void fimd_swap_data(unsigned int swap_ctl, uint64_t *data)

{

    int i;

    uint64_t res;

    uint64_t x = *data;

    if (swap_ctl & FIMD_WINCON_SWAP_BITS) {

        res = 0;

        for (i = 0; i < 64; i++) {

            if (x & (1ULL << (64 - i))) {

                res |= (1ULL << i);

            }

        }

        x = res;

    }

    if (swap_ctl & FIMD_WINCON_SWAP_BYTE) {

        x = bswap64(x);

    }

    if (swap_ctl & FIMD_WINCON_SWAP_HWORD) {

        x = ((x & 0x000000000000FFFFULL) << 48) |

            ((x & 0x00000000FFFF0000ULL) << 16) |

            ((x & 0x0000FFFF00000000ULL) >> 16) |

            ((x & 0xFFFF000000000000ULL) >> 48);

    }

    if (swap_ctl & FIMD_WINCON_SWAP_WORD) {

        x = ((x & 0x00000000FFFFFFFFULL) << 32) |

            ((x & 0xFFFFFFFF00000000ULL) >> 32);

    }

    *data = x;

}

/* Conversion routines of Pixel data from frame buffer area to internal RGBA

 * pixel representation.

 * Every color component internally represented as 8-bit value. If original

 * data has less than 8 bit for component, data is extended to 8 bit. For

 * example, if blue component has only two possible values 0 and 1 it will be

 * extended to 0 and 0xFF */

/* One bit for alpha representation */

#define DEF_PIXEL_TO_RGB_A1(N, R, G, B) \

static void N(uint32_t pixel, rgba *p) \

{ \

    p->b = ((pixel & ((1 << (B)) - 1)) << (8 - (B))) | \

           ((pixel >> (2 * (B) - 8)) & ((1 << (8 - (B))) - 1)); \

    pixel >>= (B); \

    p->g = (pixel & ((1 << (G)) - 1)) << (8 - (G)) | \

           ((pixel >> (2 * (G) - 8)) & ((1 << (8 - (G))) - 1)); \

    pixel >>= (G); \

    p->r = (pixel & ((1 << (R)) - 1)) << (8 - (R)) | \

           ((pixel >> (2 * (R) - 8)) & ((1 << (8 - (R))) - 1)); \

    pixel >>= (R); \

    p->a = (pixel & 0x1); \

}

DEF_PIXEL_TO_RGB_A1(pixel_a444_to_rgb, 4, 4, 4)

DEF_PIXEL_TO_RGB_A1(pixel_a555_to_rgb, 5, 5, 5)

DEF_PIXEL_TO_RGB_A1(pixel_a666_to_rgb, 6, 6, 6)

DEF_PIXEL_TO_RGB_A1(pixel_a665_to_rgb, 6, 6, 5)

DEF_PIXEL_TO_RGB_A1(pixel_a888_to_rgb, 8, 8, 8)

DEF_PIXEL_TO_RGB_A1(pixel_a887_to_rgb, 8, 8, 7)

/* Alpha component is always zero */

#define DEF_PIXEL_TO_RGB_A0(N, R, G, B) \

static void N(uint32_t pixel, rgba *p) \

{ \

    p->b = ((pixel & ((1 << (B)) - 1)) << (8 - (B))) | \

           ((pixel >> (2 * (B) - 8)) & ((1 << (8 - (B))) - 1)); \

    pixel >>= (B); \

    p->g = (pixel & ((1 << (G)) - 1)) << (8 - (G)) | \

           ((pixel >> (2 * (G) - 8)) & ((1 << (8 - (G))) - 1)); \

    pixel >>= (G); \

    p->r = (pixel & ((1 << (R)) - 1)) << (8 - (R)) | \

           ((pixel >> (2 * (R) - 8)) & ((1 << (8 - (R))) - 1)); \

    p->a = 0x0; \

}

DEF_PIXEL_TO_RGB_A0(pixel_565_to_rgb,  5, 6, 5)

DEF_PIXEL_TO_RGB_A0(pixel_555_to_rgb,  5, 5, 5)

DEF_PIXEL_TO_RGB_A0(pixel_666_to_rgb,  6, 6, 6)

DEF_PIXEL_TO_RGB_A0(pixel_888_to_rgb,  8, 8, 8)

/* Alpha component has some meaningful value */

#define DEF_PIXEL_TO_RGB_A(N, R, G, B, A) \

static void N(uint32_t pixel, rgba *p) \

{ \

    p->b = ((pixel & ((1 << (B)) - 1)) << (8 - (B))) | \

           ((pixel >> (2 * (B) - 8)) & ((1 << (8 - (B))) - 1)); \

    pixel >>= (B); \

    p->g = (pixel & ((1 << (G)) - 1)) << (8 - (G)) | \

           ((pixel >> (2 * (G) - 8)) & ((1 << (8 - (G))) - 1)); \

    pixel >>= (G); \

    p->r = (pixel & ((1 << (R)) - 1)) << (8 - (R)) | \

           ((pixel >> (2 * (R) - 8)) & ((1 << (8 - (R))) - 1)); \

    pixel >>= (R); \

    p->a = (pixel & ((1 << (A)) - 1)) << (8 - (A)) | \

           ((pixel >> (2 * (A) - 8)) & ((1 << (8 - (A))) - 1)); \

    p->a = p->a | (p->a << 8) | (p->a << 16); \

}

DEF_PIXEL_TO_RGB_A(pixel_4444_to_rgb, 4, 4, 4, 4)

DEF_PIXEL_TO_RGB_A(pixel_8888_to_rgb, 8, 8, 8, 8)

/* Lookup table to extent 2-bit color component to 8 bit */

static const uint8_t pixel_lutable_2b[4] = {

     0x0, 0x55, 0xAA, 0xFF

};

/* Lookup table to extent 3-bit color component to 8 bit */

static const uint8_t pixel_lutable_3b[8] = {

     0x0, 0x24, 0x49, 0x6D, 0x92, 0xB6, 0xDB, 0xFF

};

/* Special case for a232 bpp mode */

static void pixel_a232_to_rgb(uint32_t pixel, rgba *p)

{

    p->b = pixel_lutable_2b[(pixel & 0x3)];

    pixel >>= 2;

    p->g = pixel_lutable_3b[(pixel & 0x7)];

    pixel >>= 3;

    p->r = pixel_lutable_2b[(pixel & 0x3)];

    pixel >>= 2;

    p->a = (pixel & 0x1);

}

/* Special case for (5+1, 5+1, 5+1) mode. Data bit 15 is common LSB

 * for all three color components */

static void pixel_1555_to_rgb(uint32_t pixel, rgba *p)

{

    uint8_t comm = (pixel >> 15) & 1;

    p->b = ((((pixel & 0x1F) << 1) | comm) << 2) | ((pixel >> 3) & 0x3);

    pixel >>= 5;

    p->g = ((((pixel & 0x1F) << 1) | comm) << 2) | ((pixel >> 3) & 0x3);

    pixel >>= 5;

    p->r = ((((pixel & 0x1F) << 1) | comm) << 2) | ((pixel >> 3) & 0x3);

    p->a = 0x0;

}

/* Put/get pixel to/from internal LCD Controller framebuffer */

static int put_pixel_ifb(const rgba p, uint8_t *d)

{

    *(uint8_t *)d++ = p.r;

    *(uint8_t *)d++ = p.g;

    *(uint8_t *)d++ = p.b;

    *(uint32_t *)d = p.a;

    return RGBA_SIZE;

}

static int get_pixel_ifb(const uint8_t *s, rgba *p)

{

    p->r = *(uint8_t *)s++;

    p->g = *(uint8_t *)s++;

    p->b = *(uint8_t *)s++;

    p->a = (*(uint32_t *)s) & 0x00FFFFFF;

    return RGBA_SIZE;

}

static pixel_to_rgb_func *palette_data_format[8] = {

    [0] = pixel_565_to_rgb,

    [1] = pixel_a555_to_rgb,

    [2] = pixel_666_to_rgb,

    [3] = pixel_a665_to_rgb,

    [4] = pixel_a666_to_rgb,

    [5] = pixel_888_to_rgb,

    [6] = pixel_a888_to_rgb,

    [7] = pixel_8888_to_rgb

};

/* Returns Index in palette data formats table for given window number WINDOW */

static uint32_t

exynos4210_fimd_palette_format(Exynos4210fimdState *s, int window)

{

    uint32_t ret;

    switch (window) {

    case 0:

        ret = (s->wpalcon[1] >> FIMD_WPAL_W0PAL_L_SHT) & FIMD_WPAL_W0PAL_L;

        if (ret != 7) {

            ret = 6 - ret;

        }

        break;

    case 1:

        ret = (s->wpalcon[1] >> FIMD_WPAL_W1PAL_L_SHT) & FIMD_WPAL_W1PAL_L;

        if (ret != 7) {

            ret = 6 - ret;

        }

        break;

    case 2:

        ret = ((s->wpalcon[0] >> FIMD_WPAL_W2PAL_H_SHT) & FIMD_WPAL_W2PAL_H) |

            ((s->wpalcon[1] >> FIMD_WPAL_W2PAL_L_SHT) & FIMD_WPAL_W2PAL_L);

        break;

    case 3:

        ret = ((s->wpalcon[0] >> FIMD_WPAL_W3PAL_H_SHT) & FIMD_WPAL_W3PAL_H) |

            ((s->wpalcon[1] >> FIMD_WPAL_W3PAL_L_SHT) & FIMD_WPAL_W3PAL_L);

        break;

    case 4:

        ret = ((s->wpalcon[0] >> FIMD_WPAL_W4PAL_H_SHT) & FIMD_WPAL_W4PAL_H) |

            ((s->wpalcon[1] >> FIMD_WPAL_W4PAL_L_SHT) & FIMD_WPAL_W4PAL_L);

        break;

    default:

        hw_error("exynos4210.fimd: incorrect window number %d\n", window);

        ret = 0;

        break;

    }

    return ret;

}

#define FIMD_1_MINUS_COLOR(x)    \

            ((0xFF - ((x) & 0xFF)) | (0xFF00 - ((x) & 0xFF00)) | \

                                  (0xFF0000 - ((x) & 0xFF0000)))

#define EXTEND_LOWER_HALFBYTE(x) (((x) & 0xF0F0F) | (((x) << 4) & 0xF0F0F0))

#define EXTEND_UPPER_HALFBYTE(x) (((x) & 0xF0F0F0) | (((x) >> 4) & 0xF0F0F))

/* Multiply three lower bytes of two 32-bit words with each other.

 * Each byte with values 0-255 is considered as a number with possible values

 * in a range [0 - 1] */

static inline uint32_t fimd_mult_each_byte(uint32_t a, uint32_t b)

{

    uint32_t tmp;

    uint32_t ret;

    ret = ((tmp = (((a & 0xFF) * (b & 0xFF)) / 0xFF)) > 0xFF) ? 0xFF : tmp;

    ret |= ((tmp = ((((a >> 8) & 0xFF) * ((b >> 8) & 0xFF)) / 0xFF)) > 0xFF) ?

            0xFF00 : tmp << 8;

    ret |= ((tmp = ((((a >> 16) & 0xFF) * ((b >> 16) & 0xFF)) / 0xFF)) > 0xFF) ?

            0xFF0000 : tmp << 16;

    return ret;

}

/* For each corresponding bytes of two 32-bit words: (a*b + c*d)

 * Byte values 0-255 are mapped to a range [0 .. 1] */

static inline uint32_t

fimd_mult_and_sum_each_byte(uint32_t a, uint32_t b, uint32_t c, uint32_t d)

{

    uint32_t tmp;

    uint32_t ret;

    ret = ((tmp = (((a & 0xFF) * (b & 0xFF) + (c & 0xFF) * (d & 0xFF)) / 0xFF))

            > 0xFF) ? 0xFF : tmp;

    ret |= ((tmp = ((((a >> 8) & 0xFF) * ((b >> 8) & 0xFF) + ((c >> 8) & 0xFF) *

            ((d >> 8) & 0xFF)) / 0xFF)) > 0xFF) ? 0xFF00 : tmp << 8;

    ret |= ((tmp = ((((a >> 16) & 0xFF) * ((b >> 16) & 0xFF) +

            ((c >> 16) & 0xFF) * ((d >> 16) & 0xFF)) / 0xFF)) > 0xFF) ?

                    0xFF0000 : tmp << 16;

    return ret;

}

/* These routines cover all possible sources of window's transparent factor

 * used in blending equation. Choice of routine is affected by WPALCON

 * registers, BLENDCON register and window's WINCON register */

static uint32_t fimd_get_alpha_pix(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return pix_a;

}

static uint32_t

fimd_get_alpha_pix_extlow(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return EXTEND_LOWER_HALFBYTE(pix_a);

}

static uint32_t

fimd_get_alpha_pix_exthigh(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return EXTEND_UPPER_HALFBYTE(pix_a);

}

static uint32_t fimd_get_alpha_mult(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return fimd_mult_each_byte(pix_a, w->alpha_val[0]);

}

static uint32_t fimd_get_alpha_mult_ext(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return fimd_mult_each_byte(EXTEND_LOWER_HALFBYTE(pix_a),

            EXTEND_UPPER_HALFBYTE(w->alpha_val[0]));

}

static uint32_t fimd_get_alpha_aen(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return w->alpha_val[pix_a];

}

static uint32_t fimd_get_alpha_aen_ext(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return EXTEND_UPPER_HALFBYTE(w->alpha_val[pix_a]);

}

static uint32_t fimd_get_alpha_sel(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return w->alpha_val[(w->wincon & FIMD_WINCON_ALPHA_SEL) ? 1 : 0];

}

static uint32_t fimd_get_alpha_sel_ext(Exynos4210fimdWindow *w, uint32_t pix_a)

{

    return EXTEND_UPPER_HALFBYTE(w->alpha_val[(w->wincon &

            FIMD_WINCON_ALPHA_SEL) ? 1 : 0]);

}

/* Updates currently active alpha value get function for specified window */

static void fimd_update_get_alpha(Exynos4210fimdState *s, int win)

{

    Exynos4210fimdWindow *w = &s->window[win];

    const bool alpha_is_8bit = s->blendcon & FIMD_ALPHA_8BIT;

    if (w->wincon & FIMD_WINCON_BLD_PIX) {

        if ((w->wincon & FIMD_WINCON_ALPHA_SEL) && WIN_BPP_MODE_WITH_ALPHA(w)) {

            /* In this case, alpha component contains meaningful value */

            if (w->wincon & FIMD_WINCON_ALPHA_MUL) {

                w->get_alpha = alpha_is_8bit ?

                        fimd_get_alpha_mult : fimd_get_alpha_mult_ext;

            } else {

                w->get_alpha = alpha_is_8bit ?

                        fimd_get_alpha_pix : fimd_get_alpha_pix_extlow;

            }

        } else {

            if (IS_PALETTIZED_MODE(w) &&

                  PAL_MODE_WITH_ALPHA(exynos4210_fimd_palette_format(s, win))) {

                /* Alpha component has 8-bit numeric value */

                w->get_alpha = alpha_is_8bit ?

                        fimd_get_alpha_pix : fimd_get_alpha_pix_exthigh;

            } else {

                /* Alpha has only two possible values (AEN) */

                w->get_alpha = alpha_is_8bit ?

                        fimd_get_alpha_aen : fimd_get_alpha_aen_ext;

            }

        }

    } else {

        w->get_alpha = alpha_is_8bit ? fimd_get_alpha_sel :

                fimd_get_alpha_sel_ext;

    }

}

/* Blends current window's (w) pixel (foreground pixel *ret) with background

 * window (w_blend) pixel p_bg according to formula:

 * NEW_COLOR = a_coef x FG_PIXEL_COLOR + b_coef x BG_PIXEL_COLOR

 * NEW_ALPHA = p_coef x FG_ALPHA + q_coef x BG_ALPHA

 */

static void

exynos4210_fimd_blend_pixel(Exynos4210fimdWindow *w, rgba p_bg, rgba *ret)

{

    rgba p_fg = *ret;

    uint32_t bg_color = ((p_bg.r & 0xFF) << 16) | ((p_bg.g & 0xFF) << 8) |

            (p_bg.b & 0xFF);

    uint32_t fg_color = ((p_fg.r & 0xFF) << 16) | ((p_fg.g & 0xFF) << 8) |

            (p_fg.b & 0xFF);

    uint32_t alpha_fg = p_fg.a;

    int i;

    /* It is possible that blending equation parameters a and b do not

     * depend on window BLENEQ register. Account for this with first_coef */

    enum { A_COEF = 0, B_COEF = 1, P_COEF = 2, Q_COEF = 3, COEF_NUM = 4};

    uint32_t first_coef = A_COEF;

    uint32_t blend_param[COEF_NUM];

    if (w->keycon[0] & FIMD_WKEYCON0_KEYEN) {

        uint32_t colorkey = (w->keycon[1] &

              ~(w->keycon[0] & FIMD_WKEYCON0_COMPKEY)) & FIMD_WKEYCON0_COMPKEY;

        if ((w->keycon[0] & FIMD_WKEYCON0_DIRCON) &&

            (bg_color & ~(w->keycon[0] & FIMD_WKEYCON0_COMPKEY)) == colorkey) {

            /* Foreground pixel is displayed */

            if (w->keycon[0] & FIMD_WKEYCON0_KEYBLEN) {

                alpha_fg = w->keyalpha;

                blend_param[A_COEF] = alpha_fg;

                blend_param[B_COEF] = FIMD_1_MINUS_COLOR(alpha_fg);

            } else {

                alpha_fg = 0;

                blend_param[A_COEF] = 0xFFFFFF;

                blend_param[B_COEF] = 0x0;

            }

            first_coef = P_COEF;

        } else if ((w->keycon[0] & FIMD_WKEYCON0_DIRCON) == 0 &&

            (fg_color & ~(w->keycon[0] & FIMD_WKEYCON0_COMPKEY)) == colorkey) {

            /* Background pixel is displayed */

            if (w->keycon[0] & FIMD_WKEYCON0_KEYBLEN) {

                alpha_fg = w->keyalpha;

                blend_param[A_COEF] = alpha_fg;

                blend_param[B_COEF] = FIMD_1_MINUS_COLOR(alpha_fg);

            } else {

                alpha_fg = 0;

                blend_param[A_COEF] = 0x0;

                blend_param[B_COEF] = 0xFFFFFF;

            }

            first_coef = P_COEF;

        }

    }

    for (i = first_coef; i < COEF_NUM; i++) {

        switch ((w->blendeq >> i * 6) & FIMD_BLENDEQ_COEF_MASK) {

        case 0:

            blend_param[i] = 0;

            break;

        case 1:

            blend_param[i] = 0xFFFFFF;

            break;

        case 2:

            blend_param[i] = alpha_fg;

            break;

        case 3:

            blend_param[i] = FIMD_1_MINUS_COLOR(alpha_fg);

            break;

        case 4:

            blend_param[i] = p_bg.a;

            break;

        case 5:

            blend_param[i] = FIMD_1_MINUS_COLOR(p_bg.a);

            break;

        case 6:

            blend_param[i] = w->alpha_val[0];

            break;

        case 10:

            blend_param[i] = fg_color;

            break;

        case 11:

            blend_param[i] = FIMD_1_MINUS_COLOR(fg_color);

            break;

        case 12:

            blend_param[i] = bg_color;

            break;

        case 13:

            blend_param[i] = FIMD_1_MINUS_COLOR(bg_color);

            break;

        default:

            hw_error("exynos4210.fimd: blend equation coef illegal value\n");

            break;

        }

    }

    fg_color = fimd_mult_and_sum_each_byte(bg_color, blend_param[B_COEF],

            fg_color, blend_param[A_COEF]);

    ret->b = fg_color & 0xFF;

    fg_color >>= 8;

    ret->g = fg_color & 0xFF;

    fg_color >>= 8;

    ret->r = fg_color & 0xFF;

    ret->a = fimd_mult_and_sum_each_byte(alpha_fg, blend_param[P_COEF],

            p_bg.a, blend_param[Q_COEF]);

}

/* These routines read data from video frame buffer in system RAM, convert

 * this data to display controller internal representation, if necessary,

 * perform pixel blending with data, currently presented in internal buffer.

 * Result is stored in display controller internal frame buffer. */

/* Draw line with index in palette table in RAM frame buffer data */

#define DEF_DRAW_LINE_PALETTE(N) \

static void glue(draw_line_palette_, N)(Exynos4210fimdWindow *w, uint8_t *src, \

               uint8_t *dst, bool blend) \

{ \

    int width = w->rightbot_x - w->lefttop_x + 1; \

    uint8_t *ifb = dst; \

    uint8_t swap = (w->wincon & FIMD_WINCON_SWAP) >> FIMD_WINCON_SWAP_SHIFT; \

    uint64_t data; \

    rgba p, p_old; \

    int i; \

    do { \

        data = ldq_raw((void *)src); \

        src += 8; \

        fimd_swap_data(swap, &data); \

        for (i = (64 / (N) - 1); i >= 0; i--) { \

            w->pixel_to_rgb(w->palette[(data >> ((N) * i)) & \

                                   ((1ULL << (N)) - 1)], &p); \

            p.a = w->get_alpha(w, p.a); \

            if (blend) { \

                ifb +=  get_pixel_ifb(ifb, &p_old); \

                exynos4210_fimd_blend_pixel(w, p_old, &p); \

            } \

            dst += put_pixel_ifb(p, dst); \

        } \

        width -= (64 / (N)); \

    } while (width > 0); \

}

/* Draw line with direct color value in RAM frame buffer data */

#define DEF_DRAW_LINE_NOPALETTE(N) \

static void glue(draw_line_, N)(Exynos4210fimdWindow *w, uint8_t *src, \

                    uint8_t *dst, bool blend) \

{ \

    int width = w->rightbot_x - w->lefttop_x + 1; \

    uint8_t *ifb = dst; \

    uint8_t swap = (w->wincon & FIMD_WINCON_SWAP) >> FIMD_WINCON_SWAP_SHIFT; \

    uint64_t data; \

    rgba p, p_old; \

    int i; \

    do { \

        data = ldq_raw((void *)src); \

        src += 8; \

        fimd_swap_data(swap, &data); \

        for (i = (64 / (N) - 1); i >= 0; i--) { \

            w->pixel_to_rgb((data >> ((N) * i)) & ((1ULL << (N)) - 1), &p); \

            p.a = w->get_alpha(w, p.a); \

            if (blend) { \

                ifb += get_pixel_ifb(ifb, &p_old); \

                exynos4210_fimd_blend_pixel(w, p_old, &p); \

            } \

            dst += put_pixel_ifb(p, dst); \

        } \

        width -= (64 / (N)); \

    } while (width > 0); \

}

DEF_DRAW_LINE_PALETTE(1)

DEF_DRAW_LINE_PALETTE(2)

DEF_DRAW_LINE_PALETTE(4)

DEF_DRAW_LINE_PALETTE(8)

DEF_DRAW_LINE_NOPALETTE(8)  /* 8bpp mode has palette and non-palette versions */

DEF_DRAW_LINE_NOPALETTE(16)

DEF_DRAW_LINE_NOPALETTE(32)

/* Special draw line routine for window color map case */

static void draw_line_mapcolor(Exynos4210fimdWindow *w, uint8_t *src,

                       uint8_t *dst, bool blend)

{

    rgba p, p_old;

    uint8_t *ifb = dst;

    int width = w->rightbot_x - w->lefttop_x + 1;

    uint32_t map_color = w->winmap & FIMD_WINMAP_COLOR_MASK;

    do {