/*
 * BRIEF MODULE DESCRIPTION
 *      Au1200 LCD Driver.
 *
 * Copyright 2004-2005 AMD
 * Author: AMD
 *
 * Based on:
 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
 *  Created 28 Dec 1997 by Geert Uytterhoeven
 *
 *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ctype.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>

#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/au1200fb.h>   /* platform_data */
#include "au1200fb.h"

#define DRIVER_NAME "au1200fb"
#define DRIVER_DESC "LCD controller driver for AU1200 processors"

#define DEBUG 0

#define print_err(f, arg...) printk(KERN_ERR DRIVER_NAME ": " f "\n", ## arg)
#define print_warn(f, arg...) printk(KERN_WARNING DRIVER_NAME ": " f "\n", ## arg)
#define print_info(f, arg...) printk(KERN_INFO DRIVER_NAME ": " f "\n", ## arg)

#if DEBUG
#define print_dbg(f, arg...) printk(KERN_DEBUG __FILE__ ": " f "\n", ## arg)
#else
#define print_dbg(f, arg...) do {} while (0)
#endif


#define AU1200_LCD_FB_IOCTL 0x46FF

#define AU1200_LCD_SET_SCREEN 1
#define AU1200_LCD_GET_SCREEN 2
#define AU1200_LCD_SET_WINDOW 3
#define AU1200_LCD_GET_WINDOW 4
#define AU1200_LCD_SET_PANEL  5
#define AU1200_LCD_GET_PANEL  6

#define SCREEN_SIZE                 (1<< 1)
#define SCREEN_BACKCOLOR    (1<< 2)
#define SCREEN_BRIGHTNESS   (1<< 3)
#define SCREEN_COLORKEY     (1<< 4)
#define SCREEN_MASK         (1<< 5)

struct au1200_lcd_global_regs_t {
        unsigned int flags;
        unsigned int xsize;
        unsigned int ysize;
        unsigned int backcolor;
        unsigned int brightness;
        unsigned int colorkey;
        unsigned int mask;
        unsigned int panel_choice;
        char panel_desc[80];

};

#define WIN_POSITION            (1<< 0)
#define WIN_ALPHA_COLOR         (1<< 1)
#define WIN_ALPHA_MODE          (1<< 2)
#define WIN_PRIORITY            (1<< 3)
#define WIN_CHANNEL             (1<< 4)
#define WIN_BUFFER_FORMAT       (1<< 5)
#define WIN_COLOR_ORDER         (1<< 6)
#define WIN_PIXEL_ORDER         (1<< 7)
#define WIN_SIZE                (1<< 8)
#define WIN_COLORKEY_MODE       (1<< 9)
#define WIN_DOUBLE_BUFFER_MODE  (1<< 10)
#define WIN_RAM_ARRAY_MODE      (1<< 11)
#define WIN_BUFFER_SCALE        (1<< 12)
#define WIN_ENABLE                  (1<< 13)

struct au1200_lcd_window_regs_t {
        unsigned int flags;
        unsigned int xpos;
        unsigned int ypos;
        unsigned int alpha_color;
        unsigned int alpha_mode;
        unsigned int priority;
        unsigned int channel;
        unsigned int buffer_format;
        unsigned int color_order;
        unsigned int pixel_order;
        unsigned int xsize;
        unsigned int ysize;
        unsigned int colorkey_mode;
        unsigned int double_buffer_mode;
        unsigned int ram_array_mode;
        unsigned int xscale;
        unsigned int yscale;
        unsigned int enable;
};


struct au1200_lcd_iodata_t {
        unsigned int subcmd;
        struct au1200_lcd_global_regs_t global;
        struct au1200_lcd_window_regs_t window;
};

#if defined(__BIG_ENDIAN)
#define LCD_CONTROL_DEFAULT_PO LCD_CONTROL_PO_11
#else
#define LCD_CONTROL_DEFAULT_PO LCD_CONTROL_PO_00
#endif
#define LCD_CONTROL_DEFAULT_SBPPF LCD_CONTROL_SBPPF_565

/* Private, per-framebuffer management information (independent of the panel itself) */
struct au1200fb_device {
        struct fb_info *fb_info;                /* FB driver info record */
        struct au1200fb_platdata *pd;

        int                                     plane;
        unsigned char*          fb_mem;         /* FrameBuffer memory map */
        unsigned int            fb_len;
        dma_addr_t              fb_phys;
};

/********************************************************************/

/* LCD controller restrictions */
#define AU1200_LCD_MAX_XRES     1280
#define AU1200_LCD_MAX_YRES     1024
#define AU1200_LCD_MAX_BPP      32
#define AU1200_LCD_MAX_CLK      96000000 /* fixme: this needs to go away ? */
#define AU1200_LCD_NBR_PALETTE_ENTRIES 256

/* Default number of visible screen buffer to allocate */
#define AU1200FB_NBR_VIDEO_BUFFERS 1

/* Default maximum number of fb devices to create */
#define MAX_DEVICE_COUNT        4

/* Default window configuration entry to use (see windows[]) */
#define DEFAULT_WINDOW_INDEX    2

/********************************************************************/

static struct fb_info *_au1200fb_infos[MAX_DEVICE_COUNT];
static struct au1200_lcd *lcd = (struct au1200_lcd *) AU1200_LCD_ADDR;
static int device_count = MAX_DEVICE_COUNT;
static int window_index = DEFAULT_WINDOW_INDEX; /* default is zero */
static int panel_index = 2; /* default is zero */
static struct window_settings *win;
static struct panel_settings *panel;
static int noblanking = 1;
static int nohwcursor = 0;

struct window_settings {
        unsigned char name[64];
        uint32 mode_backcolor;
        uint32 mode_colorkey;
        uint32 mode_colorkeymsk;
        struct {
                int xres;
                int yres;
                int xpos;
                int ypos;
                uint32 mode_winctrl1; /* winctrl1[FRM,CCO,PO,PIPE] */
                uint32 mode_winenable;
        } w[4];
};

#if defined(__BIG_ENDIAN)
#define LCD_WINCTRL1_PO_16BPP LCD_WINCTRL1_PO_00
#else
#define LCD_WINCTRL1_PO_16BPP LCD_WINCTRL1_PO_01
#endif

/*
 * Default window configurations
 */
static struct window_settings windows[] = {
        { /* Index 0 */
                "0-FS gfx, 1-video, 2-ovly gfx, 3-ovly gfx",
                /* mode_backcolor       */ 0x006600ff,
                /* mode_colorkey,msk*/ 0, 0,
                {
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP,
                        /* mode_winenable*/ LCD_WINENABLE_WEN0,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 100, 100, 100, 100,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP |
                                LCD_WINCTRL1_PIPE,
                        /* mode_winenable*/ LCD_WINENABLE_WEN1,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP,
                        /* mode_winenable*/ 0,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP |
                                LCD_WINCTRL1_PIPE,
                        /* mode_winenable*/ 0,
                        },
                },
        },

        { /* Index 1 */
                "0-FS gfx, 1-video, 2-ovly gfx, 3-ovly gfx",
                /* mode_backcolor       */ 0x006600ff,
                /* mode_colorkey,msk*/ 0, 0,
                {
                        {
                        /* xres, yres, xpos, ypos */ 320, 240, 5, 5,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_24BPP |
                                LCD_WINCTRL1_PO_00,
                        /* mode_winenable*/ LCD_WINENABLE_WEN0,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565
                                | LCD_WINCTRL1_PO_16BPP,
                        /* mode_winenable*/ 0,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 100, 100, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP |
                                LCD_WINCTRL1_PIPE,
                        /* mode_winenable*/ 0/*LCD_WINENABLE_WEN2*/,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 200, 25, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP |
                                LCD_WINCTRL1_PIPE,
                        /* mode_winenable*/ 0,
                        },
                },
        },
        { /* Index 2 */
                "0-FS gfx, 1-video, 2-ovly gfx, 3-ovly gfx",
                /* mode_backcolor       */ 0x006600ff,
                /* mode_colorkey,msk*/ 0, 0,
                {
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP,
                        /* mode_winenable*/ LCD_WINENABLE_WEN0,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP,
                        /* mode_winenable*/ 0,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_32BPP |
                                LCD_WINCTRL1_PO_00|LCD_WINCTRL1_PIPE,
                        /* mode_winenable*/ 0/*LCD_WINENABLE_WEN2*/,
                        },
                        {
                        /* xres, yres, xpos, ypos */ 0, 0, 0, 0,
                        /* mode_winctrl1 */ LCD_WINCTRL1_FRM_16BPP565 |
                                LCD_WINCTRL1_PO_16BPP |
                                LCD_WINCTRL1_PIPE,
                        /* mode_winenable*/ 0,
                        },
                },
        },
        /* Need VGA 640 @ 24bpp, @ 32bpp */
        /* Need VGA 800 @ 24bpp, @ 32bpp */
        /* Need VGA 1024 @ 24bpp, @ 32bpp */
};

/*
 * Controller configurations for various panels.
 */

struct panel_settings
{
        const char name[25];            /* Full name <vendor>_<model> */

        struct  fb_monspecs monspecs;   /* FB monitor specs */

        /* panel timings */
        uint32 mode_screen;
        uint32 mode_horztiming;
        uint32 mode_verttiming;
        uint32 mode_clkcontrol;
        uint32 mode_pwmdiv;
        uint32 mode_pwmhi;
        uint32 mode_outmask;
        uint32 mode_fifoctrl;
        uint32 mode_toyclksrc;
        uint32 mode_backlight;
        uint32 mode_auxpll;
#define Xres min_xres
#define Yres min_yres
        u32     min_xres;               /* Minimum horizontal resolution */
        u32     max_xres;               /* Maximum horizontal resolution */
        u32     min_yres;               /* Minimum vertical resolution */
        u32     max_yres;               /* Maximum vertical resolution */
};

/********************************************************************/
/* fixme: Maybe a modedb for the CRT ? otherwise panels should be as-is */

/* List of panels known to work with the AU1200 LCD controller.
 * To add a new panel, enter the same specifications as the
 * Generic_TFT one, and MAKE SURE that it doesn't conflicts
 * with the controller restrictions. Restrictions are:
 *
 * STN color panels: max_bpp <= 12
 * STN mono panels: max_bpp <= 4
 * TFT panels: max_bpp <= 16
 * max_xres <= 800
 * max_yres <= 600
 */
static struct panel_settings known_lcd_panels[] =
{
        [0] = { /* QVGA 320x240 H:33.3kHz V:110Hz */
                .name = "QVGA_320x240",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = LCD_SCREEN_SX_N(320) |
                        LCD_SCREEN_SY_N(240),
                .mode_horztiming        = 0x00c4623b,
                .mode_verttiming        = 0x00502814,
                .mode_clkcontrol        = 0x00020002, /* /4=24Mhz */
                .mode_pwmdiv            = 0x00000000,
                .mode_pwmhi             = 0x00000000,
                .mode_outmask   = 0x00FFFFFF,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 8, /* 96MHz AUXPLL */
                320, 320,
                240, 240,
        },

        [1] = { /* VGA 640x480 H:30.3kHz V:58Hz */
                .name = "VGA_640x480",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = 0x13f9df80,
                .mode_horztiming        = 0x003c5859,
                .mode_verttiming        = 0x00741201,
                .mode_clkcontrol        = 0x00020001, /* /4=24Mhz */
                .mode_pwmdiv            = 0x00000000,
                .mode_pwmhi             = 0x00000000,
                .mode_outmask   = 0x00FFFFFF,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 8, /* 96MHz AUXPLL */
                640, 480,
                640, 480,
        },

        [2] = { /* SVGA 800x600 H:46.1kHz V:69Hz */
                .name = "SVGA_800x600",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = 0x18fa5780,
                .mode_horztiming        = 0x00dc7e77,
                .mode_verttiming        = 0x00584805,
                .mode_clkcontrol        = 0x00020000, /* /2=48Mhz */
                .mode_pwmdiv            = 0x00000000,
                .mode_pwmhi             = 0x00000000,
                .mode_outmask   = 0x00FFFFFF,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 8, /* 96MHz AUXPLL */
                800, 800,
                600, 600,
        },

        [3] = { /* XVGA 1024x768 H:56.2kHz V:70Hz */
                .name = "XVGA_1024x768",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = 0x1ffaff80,
                .mode_horztiming        = 0x007d0e57,
                .mode_verttiming        = 0x00740a01,
                .mode_clkcontrol        = 0x000A0000, /* /1 */
                .mode_pwmdiv            = 0x00000000,
                .mode_pwmhi             = 0x00000000,
                .mode_outmask   = 0x00FFFFFF,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 6, /* 72MHz AUXPLL */
                1024, 1024,
                768, 768,
        },

        [4] = { /* XVGA XVGA 1280x1024 H:68.5kHz V:65Hz */
                .name = "XVGA_1280x1024",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = 0x27fbff80,
                .mode_horztiming        = 0x00cdb2c7,
                .mode_verttiming        = 0x00600002,
                .mode_clkcontrol        = 0x000A0000, /* /1 */
                .mode_pwmdiv            = 0x00000000,
                .mode_pwmhi             = 0x00000000,
                .mode_outmask   = 0x00FFFFFF,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 10, /* 120MHz AUXPLL */
                1280, 1280,
                1024, 1024,
        },

        [5] = { /* Samsung 1024x768 TFT */
                .name = "Samsung_1024x768_TFT",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = 0x1ffaff80,
                .mode_horztiming        = 0x018cc677,
                .mode_verttiming        = 0x00241217,
                .mode_clkcontrol        = 0x00000000, /* SCB 0x1 /4=24Mhz */
                .mode_pwmdiv            = 0x8000063f, /* SCB 0x0 */
                .mode_pwmhi             = 0x03400000, /* SCB 0x0 */
                .mode_outmask   = 0x00FFFFFF,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 8, /* 96MHz AUXPLL */
                1024, 1024,
                768, 768,
        },

        [6] = { /* Toshiba 640x480 TFT */
                .name = "Toshiba_640x480_TFT",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = LCD_SCREEN_SX_N(640) |
                        LCD_SCREEN_SY_N(480),
                .mode_horztiming        = LCD_HORZTIMING_HPW_N(96) |
                        LCD_HORZTIMING_HND1_N(13) | LCD_HORZTIMING_HND2_N(51),
                .mode_verttiming        = LCD_VERTTIMING_VPW_N(2) |
                        LCD_VERTTIMING_VND1_N(11) | LCD_VERTTIMING_VND2_N(32),
                .mode_clkcontrol        = 0x00000000, /* /4=24Mhz */
                .mode_pwmdiv            = 0x8000063f,
                .mode_pwmhi             = 0x03400000,
                .mode_outmask   = 0x00fcfcfc,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 8, /* 96MHz AUXPLL */
                640, 480,
                640, 480,
        },

        [7] = { /* Sharp 320x240 TFT */
                .name = "Sharp_320x240_TFT",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 12500,
                        .hfmax = 20000,
                        .vfmin = 38,
                        .vfmax = 81,
                        .dclkmin = 4500000,
                        .dclkmax = 6800000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = LCD_SCREEN_SX_N(320) |
                        LCD_SCREEN_SY_N(240),
                .mode_horztiming        = LCD_HORZTIMING_HPW_N(60) |
                        LCD_HORZTIMING_HND1_N(13) | LCD_HORZTIMING_HND2_N(2),
                .mode_verttiming        = LCD_VERTTIMING_VPW_N(2) |
                        LCD_VERTTIMING_VND1_N(2) | LCD_VERTTIMING_VND2_N(5),
                .mode_clkcontrol        = LCD_CLKCONTROL_PCD_N(7), /*16=6Mhz*/
                .mode_pwmdiv            = 0x8000063f,
                .mode_pwmhi             = 0x03400000,
                .mode_outmask   = 0x00fcfcfc,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 8, /* 96MHz AUXPLL */
                320, 320,
                240, 240,
        },

        [8] = { /* Toppoly TD070WGCB2 7" 856x480 TFT */
                .name = "Toppoly_TD070WGCB2",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = LCD_SCREEN_SX_N(856) |
                        LCD_SCREEN_SY_N(480),
                .mode_horztiming        = LCD_HORZTIMING_HND2_N(43) |
                        LCD_HORZTIMING_HND1_N(43) | LCD_HORZTIMING_HPW_N(114),
                .mode_verttiming        = LCD_VERTTIMING_VND2_N(20) |
                        LCD_VERTTIMING_VND1_N(21) | LCD_VERTTIMING_VPW_N(4),
                .mode_clkcontrol        = 0x00020001, /* /4=24Mhz */
                .mode_pwmdiv            = 0x8000063f,
                .mode_pwmhi             = 0x03400000,
                .mode_outmask   = 0x00fcfcfc,
                .mode_fifoctrl  = 0x2f2f2f2f,
                .mode_toyclksrc = 0x00000004, /* AUXPLL directly */
                .mode_backlight = 0x00000000,
                .mode_auxpll            = 8, /* 96MHz AUXPLL */
                856, 856,
                480, 480,
        },
        [9] = {
                .name = "DB1300_800x480",
                .monspecs = {
                        .modedb = NULL,
                        .modedb_len = 0,
                        .hfmin = 30000,
                        .hfmax = 70000,
                        .vfmin = 60,
                        .vfmax = 60,
                        .dclkmin = 6000000,
                        .dclkmax = 28000000,
                        .input = FB_DISP_RGB,
                },
                .mode_screen            = LCD_SCREEN_SX_N(800) |
                                          LCD_SCREEN_SY_N(480),
                .mode_horztiming        = LCD_HORZTIMING_HPW_N(5) |
                                          LCD_HORZTIMING_HND1_N(16) |
                                          LCD_HORZTIMING_HND2_N(8),
                .mode_verttiming        = LCD_VERTTIMING_VPW_N(4) |
                                          LCD_VERTTIMING_VND1_N(8) |
                                          LCD_VERTTIMING_VND2_N(5),
                .mode_clkcontrol        = LCD_CLKCONTROL_PCD_N(1) |
                                          LCD_CLKCONTROL_IV |
                                          LCD_CLKCONTROL_IH,
                .mode_pwmdiv            = 0x00000000,
                .mode_pwmhi             = 0x00000000,
                .mode_outmask           = 0x00FFFFFF,
                .mode_fifoctrl          = 0x2f2f2f2f,
                .mode_toyclksrc         = 0x00000004, /* AUXPLL directly */
                .mode_backlight         = 0x00000000,
                .mode_auxpll            = (48/12) * 2,
                800, 800,
                480, 480,
        },
};

#define NUM_PANELS (ARRAY_SIZE(known_lcd_panels))

/********************************************************************/

static int winbpp (unsigned int winctrl1)
{
        int bits = 0;

        /* how many bits are needed for each pixel format */
        switch (winctrl1 & LCD_WINCTRL1_FRM) {
        case LCD_WINCTRL1_FRM_1BPP:
                bits = 1;
                break;
        case LCD_WINCTRL1_FRM_2BPP:
                bits = 2;
                break;
        case LCD_WINCTRL1_FRM_4BPP:
                bits = 4;
                break;
        case LCD_WINCTRL1_FRM_8BPP:
                bits = 8;
                break;
        case LCD_WINCTRL1_FRM_12BPP:
        case LCD_WINCTRL1_FRM_16BPP655:
        case LCD_WINCTRL1_FRM_16BPP565:
        case LCD_WINCTRL1_FRM_16BPP556:
        case LCD_WINCTRL1_FRM_16BPPI1555:
        case LCD_WINCTRL1_FRM_16BPPI5551:
        case LCD_WINCTRL1_FRM_16BPPA1555:
        case LCD_WINCTRL1_FRM_16BPPA5551:
                bits = 16;
                break;
        case LCD_WINCTRL1_FRM_24BPP:
        case LCD_WINCTRL1_FRM_32BPP:
                bits = 32;
                break;
        }

        return bits;
}

static int fbinfo2index (struct fb_info *fb_info)
{
        int i;

        for (i = 0; i < device_count; ++i) {
                if (fb_info == _au1200fb_infos[i])
                        return i;
        }
        printk("au1200fb: ERROR: fbinfo2index failed!\n");
        return -1;
}

static int au1200_setlocation (struct au1200fb_device *fbdev, int plane,
        int xpos, int ypos)
{
        uint32 winctrl0, winctrl1, winenable, fb_offset = 0;
        int xsz, ysz;

        /* FIX!!! NOT CHECKING FOR COMPLETE OFFSCREEN YET */

        winctrl0 = lcd->window[plane].winctrl0;
        winctrl1 = lcd->window[plane].winctrl1;
        winctrl0 &= (LCD_WINCTRL0_A | LCD_WINCTRL0_AEN);
        winctrl1 &= ~(LCD_WINCTRL1_SZX | LCD_WINCTRL1_SZY);

        /* Check for off-screen adjustments */
        xsz = win->w[plane].xres;
        ysz = win->w[plane].yres;
        if ((xpos + win->w[plane].xres) > panel->Xres) {
                /* Off-screen to the right */
                xsz = panel->Xres - xpos; /* off by 1 ??? */
                /*printk("off screen right\n");*/
        }

        if ((ypos + win->w[plane].yres) > panel->Yres) {
                /* Off-screen to the bottom */
                ysz = panel->Yres - ypos; /* off by 1 ??? */
                /*printk("off screen bottom\n");*/
        }

        if (xpos < 0) {
                /* Off-screen to the left */
                xsz = win->w[plane].xres + xpos;
                fb_offset += (((0 - xpos) * winbpp(lcd->window[plane].winctrl1))/8);
                xpos = 0;
                /*printk("off screen left\n");*/
        }

        if (ypos < 0) {
                /* Off-screen to the top */
                ysz = win->w[plane].yres + ypos;
                /* fixme: fb_offset += ((0-ypos)*fb_pars[plane].line_length); */
                ypos = 0;
                /*printk("off screen top\n");*/
        }

        /* record settings */
        win->w[plane].xpos = xpos;
        win->w[plane].ypos = ypos;

        xsz -= 1;
        ysz -= 1;
        winctrl0 |= (xpos << 21);
        winctrl0 |= (ypos << 10);
        winctrl1 |= (xsz << 11);
        winctrl1 |= (ysz << 0);

        /* Disable the window while making changes, then restore WINEN */
        winenable = lcd->winenable & (1 << plane);
        au_sync();
        lcd->winenable &= ~(1 << plane);
        lcd->window[plane].winctrl0 = winctrl0;
        lcd->window[plane].winctrl1 = winctrl1;
        lcd->window[plane].winbuf0 =
        lcd->window[plane].winbuf1 = fbdev->fb_phys;
        lcd->window[plane].winbufctrl = 0; /* select winbuf0 */
        lcd->winenable |= winenable;
        au_sync();

        return 0;
}

static void au1200_setpanel(struct panel_settings *newpanel,
                            struct au1200fb_platdata *pd)
{
        /*
         * Perform global setup/init of LCD controller
         */
        uint32 winenable;

        /* Make sure all windows disabled */
        winenable = lcd->winenable;
        lcd->winenable = 0;
        au_sync();
        /*
         * Ensure everything is disabled before reconfiguring
         */
        if (lcd->screen & LCD_SCREEN_SEN) {
                /* Wait for vertical sync period */
                lcd->intstatus = LCD_INT_SS;
                while ((lcd->intstatus & LCD_INT_SS) == 0) {
                        au_sync();
                }

                lcd->screen &= ~LCD_SCREEN_SEN; /*disable the controller*/

                do {
                        lcd->intstatus = lcd->intstatus; /*clear interrupts*/
                        au_sync();
                /*wait for controller to shut down*/
                } while ((lcd->intstatus & LCD_INT_SD) == 0);

                /* Call shutdown of current panel (if up) */
                /* this must occur last, because if an external clock is driving
                    the controller, the clock cannot be turned off before first
                        shutting down the controller.
                 */
                if (pd->panel_shutdown)
                        pd->panel_shutdown();
        }

        /* Newpanel == NULL indicates a shutdown operation only */
        if (newpanel == NULL)
                return;

        panel = newpanel;

        printk("Panel(%s), %dx%d\n", panel->name, panel->Xres, panel->Yres);

        /*
         * Setup clocking if internal LCD clock source (assumes sys_auxpll valid)
         */
        if (!(panel->mode_clkcontrol & LCD_CLKCONTROL_EXT))
        {
                uint32 sys_clksrc;
                au_writel(panel->mode_auxpll, SYS_AUXPLL);
                sys_clksrc = au_readl(SYS_CLKSRC) & ~0x0000001f;
                sys_clksrc |= panel->mode_toyclksrc;
                au_writel(sys_clksrc, SYS_CLKSRC);
        }

        /*
         * Configure panel timings
         */
        lcd->screen = panel->mode_screen;
        lcd->horztiming = panel->mode_horztiming;
        lcd->verttiming = panel->mode_verttiming;
        lcd->clkcontrol = panel->mode_clkcontrol;
        lcd->pwmdiv = panel->mode_pwmdiv;
        lcd->pwmhi = panel->mode_pwmhi;
        lcd->outmask = panel->mode_outmask;
        lcd->fifoctrl = panel->mode_fifoctrl;
        au_sync();

        /* fixme: Check window settings to make sure still valid
         * for new geometry */
#if 0
        au1200_setlocation(fbdev, 0, win->w[0].xpos, win->w[0].ypos);
        au1200_setlocation(fbdev, 1, win->w[1].xpos, win->w[1].ypos);
        au1200_setlocation(fbdev, 2, win->w[2].xpos, win->w[2].ypos);
        au1200_setlocation(fbdev, 3, win->w[3].xpos, win->w[3].ypos);
#endif
        lcd->winenable = winenable;

        /*
         * Re-enable screen now that it is configured
         */
        lcd->screen |= LCD_SCREEN_SEN;
        au_sync();

        /* Call init of panel */
        if (pd->panel_init)
                pd->panel_init();

        /* FIX!!!! not appropriate on panel change!!! Global setup/init */
        lcd->intenable = 0;
        lcd->intstatus = ~0;
        lcd->backcolor = win->mode_backcolor;

        /* Setup Color Key - FIX!!! */
        lcd->colorkey = win->mode_colorkey;
        lcd->colorkeymsk = win->mode_colorkeymsk;

        /* Setup HWCursor - FIX!!! Need to support this eventually */
        lcd->hwc.cursorctrl = 0;
        lcd->hwc.cursorpos = 0;
        lcd->hwc.cursorcolor0 = 0;
        lcd->hwc.cursorcolor1 = 0;
        lcd->hwc.cursorcolor2 = 0;
        lcd->hwc.cursorcolor3 = 0;


#if 0
#define D(X) printk("%25s: %08X\n", #X, X)
        D(lcd->screen);
        D(lcd->horztiming);
        D(lcd->verttiming);
        D(lcd->clkcontrol);
        D(lcd->pwmdiv);
        D(lcd->pwmhi);
        D(lcd->outmask);
        D(lcd->fifoctrl);
        D(lcd->window[0].winctrl0);
        D(lcd->window[0].winctrl1);
        D(lcd->window[0].winctrl2);
        D(lcd->window[0].winbuf0);
        D(lcd->window[0].winbuf1);
        D(lcd->window[0].winbufctrl);
        D(lcd->window[1].winctrl0);
        D(lcd->window[1].winctrl1);
        D(lcd->window[1].winctrl2);
        D(lcd->window[1].winbuf0);
        D(lcd->window[1].winbuf1);
        D(lcd->window[1].winbufctrl);
        D(lcd->window[2].winctrl0);
        D(lcd->window[2].winctrl1);
        D(lcd->window[2].winctrl2);
        D(lcd->window[2].winbuf0);
        D(lcd->window[2].winbuf1);
        D(lcd->window[2].winbufctrl);
        D(lcd->window[3].winctrl0);
        D(lcd->window[3].winctrl1);
        D(lcd->window[3].winctrl2);
        D(lcd->window[3].winbuf0);
        D(lcd->window[3].winbuf1);
        D(lcd->window[3].winbufctrl);
        D(lcd->winenable);
        D(lcd->intenable);
        D(lcd->intstatus);
        D(lcd->backcolor);
        D(lcd->winenable);
        D(lcd->colorkey);
    D(lcd->colorkeymsk);
        D(lcd->hwc.cursorctrl);
        D(lcd->hwc.cursorpos);
        D(lcd->hwc.cursorcolor0);
        D(lcd->hwc.cursorcolor1);
        D(lcd->hwc.cursorcolor2);
        D(lcd->hwc.cursorcolor3);
#endif
}

static void au1200_setmode(struct au1200fb_device *fbdev)
{
        int plane = fbdev->plane;
        /* Window/plane setup */
        lcd->window[plane].winctrl1 = ( 0
                | LCD_WINCTRL1_PRI_N(plane)
                | win->w[plane].mode_winctrl1 /* FRM,CCO,PO,PIPE */
                ) ;

        au1200_setlocation(fbdev, plane, win->w[plane].xpos, win->w[plane].ypos);

        lcd->window[plane].winctrl2 = ( 0
                | LCD_WINCTRL2_CKMODE_00
                | LCD_WINCTRL2_DBM
                | LCD_WINCTRL2_BX_N(fbdev->fb_info->fix.line_length)
                | LCD_WINCTRL2_SCX_1
                | LCD_WINCTRL2_SCY_1
                ) ;
        lcd->winenable |= win->w[plane].mode_winenable;
        au_sync();
}


/* Inline helpers */

/*#define panel_is_dual(panel)  ((panel->mode_screen & LCD_SCREEN_PT) == LCD_SCREEN_PT_010)*/
/*#define panel_is_active(panel)((panel->mode_screen & LCD_SCREEN_PT) == LCD_SCREEN_PT_010)*/

#define panel_is_color(panel) ((panel->mode_screen & LCD_SCREEN_PT) <= LCD_SCREEN_PT_CDSTN)

/* Bitfields format supported by the controller. */
static struct fb_bitfield rgb_bitfields[][4] = {
        /*     Red,        Green,        Blue,       Transp   */
        [LCD_WINCTRL1_FRM_16BPP655 >> 25] =
                { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },

        [LCD_WINCTRL1_FRM_16BPP565 >> 25] =
                { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },

        [LCD_WINCTRL1_FRM_16BPP556 >> 25] =
                { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },

        [LCD_WINCTRL1_FRM_16BPPI1555 >> 25] =
                { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },

        [LCD_WINCTRL1_FRM_16BPPI5551 >> 25] =
                { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 0, 0 } },

        [LCD_WINCTRL1_FRM_16BPPA1555 >> 25] =
                { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },

        [LCD_WINCTRL1_FRM_16BPPA5551 >> 25] =
                { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },

        [LCD_WINCTRL1_FRM_24BPP >> 25] =
                { { 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 0, 0, 0 } },

        [LCD_WINCTRL1_FRM_32BPP >> 25] =
                { { 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 0, 0 } },
};

/*-------------------------------------------------------------------------*/

/* Helpers */

static void au1200fb_update_fbinfo(struct fb_info *fbi)
{
        /* FIX!!!! This also needs to take the window pixel format into account!!! */

        /* Update var-dependent FB info */
        if (panel_is_color(panel)) {
                if (fbi->var.bits_per_pixel <= 8) {
                        /* palettized */
                        fbi->fix.visual = FB_VISUAL_PSEUDOCOLOR;
                        fbi->fix.line_length = fbi->var.xres_virtual /
                                (8/fbi->var.bits_per_pixel);
                } else {
                        /* non-palettized */
                        fbi->fix.visual = FB_VISUAL_TRUECOLOR;
                        fbi->fix.line_length = fbi->var.xres_virtual * (fbi->var.bits_per_pixel / 8);
                }
        } else {
                /* mono FIX!!! mono 8 and 4 bits */
                fbi->fix.visual = FB_VISUAL_MONO10;
                fbi->fix.line_length = fbi->var.xres_virtual / 8;
        }

        fbi->screen_size = fbi->fix.line_length * fbi->var.yres_virtual;
        print_dbg("line length: %d\n", fbi->fix.line_length);
        print_dbg("bits_per_pixel: %d\n", fbi->var.bits_per_pixel);
}

/*-------------------------------------------------------------------------*/

/* AU1200 framebuffer driver */

/* fb_check_var
 * Validate var settings with hardware restrictions and modify it if necessary
 */
static int au1200fb_fb_check_var(struct fb_var_screeninfo *var,
        struct fb_info *fbi)
{
        struct au1200fb_device *fbdev = fbi->par;
        u32 pixclock;
        int screen_size, plane;

        plane = fbdev->plane;

        /* Make sure that the mode respect all LCD controller and
         * panel restrictions. */
        var->xres = win->w[plane].xres;
        var->yres = win->w[plane].yres;

        /* No need for virtual resolution support */
        var->xres_virtual = var->xres;
        var->yres_virtual = var->yres;

        var->bits_per_pixel = winbpp(win->w[plane].mode_winctrl1);

        screen_size = var->xres_virtual * var->yres_virtual;
        if (var->bits_per_pixel > 8) screen_size *= (var->bits_per_pixel / 8);
        else screen_size /= (8/var->bits_per_pixel);

        if (fbdev->fb_len < screen_size)
                return -EINVAL; /* Virtual screen is to big, abort */

        /* FIX!!!! what are the implicaitons of ignoring this for windows ??? */
        /* The max LCD clock is fixed to 48MHz (value of AUX_CLK). The pixel
         * clock can only be obtain by dividing this value by an even integer.
         * Fallback to a slower pixel clock if necessary. */
        pixclock = max((u32)(PICOS2KHZ(var->pixclock) * 1000), fbi->monspecs.dclkmin);
        pixclock = min3(pixclock, fbi->monspecs.dclkmax, (u32)AU1200_LCD_MAX_CLK/2);

        if (AU1200_LCD_MAX_CLK % pixclock) {
                int diff = AU1200_LCD_MAX_CLK % pixclock;
                pixclock -= diff;
        }

        var->pixclock = KHZ2PICOS(pixclock/1000);
#if 0
        if (!panel_is_active(panel)) {
                int pcd = AU1200_LCD_MAX_CLK / (pixclock * 2) - 1;

                if (!panel_is_color(panel)
                        && (panel->control_base & LCD_CONTROL_MPI) && (pcd < 3)) {
                        /* STN 8bit mono panel support is up to 6MHz pixclock */
                        var->pixclock = KHZ2PICOS(6000);
                } else if (!pcd) {
                        /* Other STN panel support is up to 12MHz  */
                        var->pixclock = KHZ2PICOS(12000);
                }
        }
#endif
        /* Set bitfield accordingly */
        switch (var->bits_per_pixel) {
                case 16:
                {
                        /* 16bpp True color.
                         * These must be set to MATCH WINCTRL[FORM] */
                        int idx;
                        idx = (win->w[0].mode_winctrl1 & LCD_WINCTRL1_FRM) >> 25;
                        var->red    = rgb_bitfields[idx][0];
                        var->green  = rgb_bitfields[idx][1];
                        var->blue   = rgb_bitfields[idx][2];
                        var->transp = rgb_bitfields[idx][3];
                        break;
                }

                case 32:
                {
                        /* 32bpp True color.
                         * These must be set to MATCH WINCTRL[FORM] */
                        int idx;
                        idx = (win->w[0].mode_winctrl1 & LCD_WINCTRL1_FRM) >> 25;
                        var->red    = rgb_bitfields[idx][0];
                        var->green  = rgb_bitfields[idx][1];
                        var->blue   = rgb_bitfields[idx][2];
                        var->transp = rgb_bitfields[idx][3];
                        break;
                }
                default:
                        print_dbg("Unsupported depth %dbpp", var->bits_per_pixel);
                        return -EINVAL;
        }

        return 0;
}

/* fb_set_par
 * Set hardware with var settings. This will enable the controller with a
 * specific mode, normally validated with the fb_check_var method
 */
static int au1200fb_fb_set_par(struct fb_info *fbi)
{
        struct au1200fb_device *fbdev = fbi->par;

        au1200fb_update_fbinfo(fbi);
        au1200_setmode(fbdev);

        return 0;
}

/* fb_setcolreg
 * Set color in LCD palette.
 */
static int au1200fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
        unsigned blue, unsigned transp, struct fb_info *fbi)
{
        volatile u32 *palette = lcd->palette;
        u32 value;

        if (regno > (AU1200_LCD_NBR_PALETTE_ENTRIES - 1))
                return -EINVAL;

        if (fbi->var.grayscale) {
                /* Convert color to grayscale */
                red = green = blue =
                        (19595 * red + 38470 * green + 7471 * blue) >> 16;
        }

        if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
                /* Place color in the pseudopalette */
                if (regno > 16)
                        return -EINVAL;

                palette = (u32*) fbi->pseudo_palette;

                red   >>= (16 - fbi->var.red.length);
                green >>= (16 - fbi->var.green.length);
                blue  >>= (16 - fbi->var.blue.length);

                value = (red   << fbi->var.red.offset)  |
                        (green << fbi->var.green.offset)|
                        (blue  << fbi->var.blue.offset);
                value &= 0xFFFF;

        } else if (1 /*FIX!!! panel_is_active(fbdev->panel)*/) {
                /* COLOR TFT PALLETTIZED (use RGB 565) */
                value = (red & 0xF800)|((green >> 5) &
                                0x07E0)|((blue >> 11) & 0x001F);
                value &= 0xFFFF;

        } else if (0 /*panel_is_color(fbdev->panel)*/) {
                /* COLOR STN MODE */
                value = 0x1234;
                value &= 0xFFF;
        } else {
                /* MONOCHROME MODE */
                value = (green >> 12) & 0x000F;
                value &= 0xF;
        }

        palette[regno] = value;

        return 0;
}

/* fb_blank
 * Blank the screen. Depending on the mode, the screen will be
 * activated with the backlight color, or desactivated
 */
static int au1200fb_fb_blank(int blank_mode, struct fb_info *fbi)
{
        struct au1200fb_device *fbdev = fbi->par;

        /* Short-circuit screen blanking */
        if (noblanking)
                return 0;

        switch (blank_mode) {

        case FB_BLANK_UNBLANK:
        case FB_BLANK_NORMAL:
                /* printk("turn on panel\n"); */
                au1200_setpanel(panel, fbdev->pd);
                break;
        case FB_BLANK_VSYNC_SUSPEND:
        case FB_BLANK_HSYNC_SUSPEND:
        case FB_BLANK_POWERDOWN:
                /* printk("turn off panel\n"); */
                au1200_setpanel(NULL, fbdev->pd);
                break;
        default:
                break;

        }

        /* FB_BLANK_NORMAL is a soft blank */
        return (blank_mode == FB_BLANK_NORMAL) ? -EINVAL : 0;
}

/* fb_mmap
 * Map video memory in user space. We don't use the generic fb_mmap
 * method mainly to allow the use of the TLB streaming flag (CCA=6)
 */
static int au1200fb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)

{
        unsigned int len;
        unsigned long start=0, off;
        struct au1200fb_device *fbdev = info->par;

        if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
                return -EINVAL;
        }

        start = fbdev->fb_phys & PAGE_MASK;
        len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);

        off = vma->vm_pgoff << PAGE_SHIFT;

        if ((vma->vm_end - vma->vm_start + off) > len) {
                return -EINVAL;
        }

        off += start;
        vma->vm_pgoff = off >> PAGE_SHIFT;

        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
        pgprot_val(vma->vm_page_prot) |= _CACHE_MASK; /* CCA=7 */

        vma->vm_flags |= VM_IO;

        return io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
                                  vma->vm_end - vma->vm_start,
                                  vma->vm_page_prot);

        return 0;
}

static void set_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
{

        unsigned int hi1, divider;

        /* SCREEN_SIZE: user cannot reset size, must switch panel choice */

        if (pdata->flags & SCREEN_BACKCOLOR)
                lcd->backcolor = pdata->backcolor;

        if (pdata->flags & SCREEN_BRIGHTNESS) {

                // limit brightness pwm duty to >= 30/1600
                if (pdata->brightness < 30) {
                        pdata->brightness = 30;
                }
                divider = (lcd->pwmdiv & 0x3FFFF) + 1;
                hi1 = (lcd->pwmhi >> 16) + 1;
                hi1 = (((pdata->brightness & 0xFF)+1) * divider >> 8);
                lcd->pwmhi &= 0xFFFF;
                lcd->pwmhi |= (hi1 << 16);
        }

        if (pdata->flags & SCREEN_COLORKEY)
                lcd->colorkey = pdata->colorkey;

        if (pdata->flags & SCREEN_MASK)
                lcd->colorkeymsk = pdata->mask;
        au_sync();
}

static void get_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
{
        unsigned int hi1, divider;

        pdata->xsize = ((lcd->screen & LCD_SCREEN_SX) >> 19) + 1;
        pdata->ysize = ((lcd->screen & LCD_SCREEN_SY) >> 8) + 1;

        pdata->backcolor = lcd->backcolor;
        pdata->colorkey = lcd->colorkey;
        pdata->mask = lcd->colorkeymsk;

        // brightness
        hi1 = (lcd->pwmhi >> 16) + 1;
        divider = (lcd->pwmdiv & 0x3FFFF) + 1;
        pdata->brightness = ((hi1 << 8) / divider) - 1;
        au_sync();
}

static void set_window(unsigned int plane,
        struct au1200_lcd_window_regs_t *pdata)
{
        unsigned int val, bpp;

        /* Window control register 0 */
        if (pdata->flags & WIN_POSITION) {
                val = lcd->window[plane].winctrl0 & ~(LCD_WINCTRL0_OX |
                                LCD_WINCTRL0_OY);
                val |= ((pdata->xpos << 21) & LCD_WINCTRL0_OX);
                val |= ((pdata->ypos << 10) & LCD_WINCTRL0_OY);
                lcd->window[plane].winctrl0 = val;
        }
        if (pdata->flags & WIN_ALPHA_COLOR) {
                val = lcd->window[plane].winctrl0 & ~(LCD_WINCTRL0_A);
                val |= ((pdata->alpha_color << 2) & LCD_WINCTRL0_A);
                lcd->window[plane].winctrl0 = val;
        }
        if (pdata->flags & WIN_ALPHA_MODE) {
                val = lcd->window[plane].winctrl0 & ~(LCD_WINCTRL0_AEN);
                val |= ((pdata->alpha_mode << 1) & LCD_WINCTRL0_AEN);
                lcd->window[plane].winctrl0 = val;
        }

        /* Window control register 1 */
        if (pdata->flags & WIN_PRIORITY) {
                val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_PRI);
                val |= ((pdata->priority << 30) & LCD_WINCTRL1_PRI);
                lcd->window[plane].winctrl1 = val;
        }
        if (pdata->flags & WIN_CHANNEL) {
                val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_PIPE);
                val |= ((pdata->channel << 29) & LCD_WINCTRL1_PIPE);
                lcd->window[plane].winctrl1 = val;
        }
        if (pdata->flags & WIN_BUFFER_FORMAT) {
                val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_FRM);
                val |= ((pdata->buffer_format << 25) & LCD_WINCTRL1_FRM);
                lcd->window[plane].winctrl1 = val;
        }
        if (pdata->flags & WIN_COLOR_ORDER) {
                val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_CCO);
                val |= ((pdata->color_order << 24) & LCD_WINCTRL1_CCO);
                lcd->window[plane].winctrl1 = val;
        }
        if (pdata->flags & WIN_PIXEL_ORDER) {
                val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_PO);
                val |= ((pdata->pixel_order << 22) & LCD_WINCTRL1_PO);
                lcd->window[plane].winctrl1 = val;
        }
        if (pdata->flags & WIN_SIZE) {
                val = lcd->window[plane].winctrl1 & ~(LCD_WINCTRL1_SZX |
                                LCD_WINCTRL1_SZY);
                val |= (((pdata->xsize << 11) - 1) & LCD_WINCTRL1_SZX);
                val |= (((pdata->ysize) - 1) & LCD_WINCTRL1_SZY);
                lcd->window[plane].winctrl1 = val;
                /* program buffer line width */
                bpp = winbpp(val) / 8;
                val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_BX);
                val |= (((pdata->xsize * bpp) << 8) & LCD_WINCTRL2_BX);
                lcd->window[plane].winctrl2 = val;
        }

        /* Window control register 2 */
        if (pdata->flags & WIN_COLORKEY_MODE) {
                val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_CKMODE);
                val |= ((pdata->colorkey_mode << 24) & LCD_WINCTRL2_CKMODE);
                lcd->window[plane].winctrl2 = val;
        }
        if (pdata->flags & WIN_DOUBLE_BUFFER_MODE) {
                val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_DBM);
                val |= ((pdata->double_buffer_mode << 23) & LCD_WINCTRL2_DBM);
                lcd->window[plane].winctrl2 = val;
        }
        if (pdata->flags & WIN_RAM_ARRAY_MODE) {
                val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_RAM);
                val |= ((pdata->ram_array_mode << 21) & LCD_WINCTRL2_RAM);
                lcd->window[plane].winctrl2 = val;
        }

        /* Buffer line width programmed with WIN_SIZE */

        if (pdata->flags & WIN_BUFFER_SCALE) {
                val = lcd->window[plane].winctrl2 & ~(LCD_WINCTRL2_SCX |
                                LCD_WINCTRL2_SCY);
                val |= ((pdata->xsize << 11) & LCD_WINCTRL2_SCX);
                val |= ((pdata->ysize) & LCD_WINCTRL2_SCY);
                lcd->window[plane].winctrl2 = val;
        }

        if (pdata->flags & WIN_ENABLE) {
                val = lcd->winenable;
                val &= ~(1<<plane);
                val |= (pdata->enable & 1) << plane;
                lcd->winenable = val;
        }
        au_sync();
}

static void get_window(unsigned int plane,
        struct au1200_lcd_window_regs_t *pdata)
{
        /* Window control register 0 */
        pdata->xpos = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_OX) >> 21;
        pdata->ypos = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_OY) >> 10;
        pdata->alpha_color = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_A) >> 2;
        pdata->alpha_mode = (lcd->window[plane].winctrl0 & LCD_WINCTRL0_AEN) >> 1;

        /* Window control register 1 */
        pdata->priority = (lcd->window[plane].winctrl1& LCD_WINCTRL1_PRI) >> 30;
        pdata->channel = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_PIPE) >> 29;
        pdata->buffer_format = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_FRM) >> 25;
        pdata->color_order = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_CCO) >> 24;
        pdata->pixel_order = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_PO) >> 22;
        pdata->xsize = ((lcd->window[plane].winctrl1 & LCD_WINCTRL1_SZX) >> 11) + 1;
        pdata->ysize = (lcd->window[plane].winctrl1 & LCD_WINCTRL1_SZY) + 1;

        /* Window control register 2 */
        pdata->colorkey_mode = (lcd->window[plane].winctrl2 & LCD_WINCTRL2_CKMODE) >> 24;
        pdata->double_buffer_mode = (lcd->window[plane].winctrl2 & LCD_WINCTRL2_DBM) >> 23;
        pdata->ram_array_mode = (lcd->window[plane].winctrl2 & LCD_WINCTRL2_RAM) >> 21;

        pdata->enable = (lcd->winenable >> plane) & 1;
        au_sync();
}

static int au1200fb_ioctl(struct fb_info *info, unsigned int cmd,
                          unsigned long arg)
{
        struct au1200fb_device *fbdev = info->par;
        int plane;
        int val;

        plane = fbinfo2index(info);
        print_dbg("au1200fb: ioctl %d on plane %d\n", cmd, plane);

        if (cmd == AU1200_LCD_FB_IOCTL) {
                struct au1200_lcd_iodata_t iodata;

                if (copy_from_user(&iodata, (void __user *) arg, sizeof(iodata)))
                        return -EFAULT;

                print_dbg("FB IOCTL called\n");

                switch (iodata.subcmd) {
                case AU1200_LCD_SET_SCREEN:
                        print_dbg("AU1200_LCD_SET_SCREEN\n");
                        set_global(cmd, &iodata.global);
                        break;

                case AU1200_LCD_GET_SCREEN:
                        print_dbg("AU1200_LCD_GET_SCREEN\n");
                        get_global(cmd, &iodata.global);
                        break;

                case AU1200_LCD_SET_WINDOW:
                        print_dbg("AU1200_LCD_SET_WINDOW\n");
                        set_window(plane, &iodata.window);
                        break;

                case AU1200_LCD_GET_WINDOW:
                        print_dbg("AU1200_LCD_GET_WINDOW\n");
                        get_window(plane, &iodata.window);
                        break;

                case AU1200_LCD_SET_PANEL:
                        print_dbg("AU1200_LCD_SET_PANEL\n");
                        if ((iodata.global.panel_choice >= 0) &&
                                        (iodata.global.panel_choice <
                                         NUM_PANELS))
                        {
                                struct panel_settings *newpanel;
                                panel_index = iodata.global.panel_choice;
                                newpanel = &known_lcd_panels[panel_index];
                                au1200_setpanel(newpanel, fbdev->pd);
                        }
                        break;

                case AU1200_LCD_GET_PANEL:
                        print_dbg("AU1200_LCD_GET_PANEL\n");
                        iodata.global.panel_choice = panel_index;
                        break;

                default:
                        return -EINVAL;
                }

                val = copy_to_user((void __user *) arg, &iodata, sizeof(iodata));
                if (val) {
                        print_dbg("error: could not copy %d bytes\n", val);
                        return -EFAULT;
                }
        }

        return 0;
}


static struct fb_ops au1200fb_fb_ops = {
        .owner          = THIS_MODULE,
        .fb_check_var   = au1200fb_fb_check_var,
        .fb_set_par     = au1200fb_fb_set_par,
        .fb_setcolreg   = au1200fb_fb_setcolreg,
        .fb_blank       = au1200fb_fb_blank,
        .fb_fillrect    = sys_fillrect,
        .fb_copyarea    = sys_copyarea,
        .fb_imageblit   = sys_imageblit,
        .fb_read        = fb_sys_read,
        .fb_write       = fb_sys_write,
        .fb_sync        = NULL,
        .fb_ioctl       = au1200fb_ioctl,
        .fb_mmap        = au1200fb_fb_mmap,
};

/*-------------------------------------------------------------------------*/

static irqreturn_t au1200fb_handle_irq(int irq, void* dev_id)
{
        /* Nothing to do for now, just clear any pending interrupt */
        lcd->intstatus = lcd->intstatus;
        au_sync();

        return IRQ_HANDLED;
}

/*-------------------------------------------------------------------------*/

/* AU1200 LCD device probe helpers */

static int au1200fb_init_fbinfo(struct au1200fb_device *fbdev)
{
        struct fb_info *fbi = fbdev->fb_info;
        int bpp;

        fbi->fbops = &au1200fb_fb_ops;

        bpp = winbpp(win->w[fbdev->plane].mode_winctrl1);

        /* Copy monitor specs from panel data */
        /* fixme: we're setting up LCD controller windows, so these dont give a
        damn as to what the monitor specs are (the panel itself does, but that
        isn't done here...so maybe need a generic catchall monitor setting??? */
        memcpy(&fbi->monspecs, &panel->monspecs, sizeof(struct fb_monspecs));

        /* We first try the user mode passed in argument. If that failed,
         * or if no one has been specified, we default to the first mode of the
         * panel list. Note that after this call, var data will be set */
        if (!fb_find_mode(&fbi->var,
                          fbi,
                          NULL, /* drv_info.opt_mode, */
                          fbi->monspecs.modedb,
                          fbi->monspecs.modedb_len,
                          fbi->monspecs.modedb,
                          bpp)) {

                print_err("Cannot find valid mode for panel %s", panel->name);
                return -EFAULT;
        }

        fbi->pseudo_palette = kcalloc(16, sizeof(u32), GFP_KERNEL);
        if (!fbi->pseudo_palette) {
                return -ENOMEM;
        }

        if (fb_alloc_cmap(&fbi->cmap, AU1200_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
                print_err("Fail to allocate colormap (%d entries)",
                           AU1200_LCD_NBR_PALETTE_ENTRIES);
                kfree(fbi->pseudo_palette);
                return -EFAULT;
        }

        strncpy(fbi->fix.id, "AU1200", sizeof(fbi->fix.id));
        fbi->fix.smem_start = fbdev->fb_phys;
        fbi->fix.smem_len = fbdev->fb_len;
        fbi->fix.type = FB_TYPE_PACKED_PIXELS;
        fbi->fix.xpanstep = 0;
        fbi->fix.ypanstep = 0;
        fbi->fix.mmio_start = 0;
        fbi->fix.mmio_len = 0;
        fbi->fix.accel = FB_ACCEL_NONE;

        fbi->screen_base = (char __iomem *) fbdev->fb_mem;

        au1200fb_update_fbinfo(fbi);

        return 0;
}

/*-------------------------------------------------------------------------*/


static int au1200fb_setup(struct au1200fb_platdata *pd)
{
        char *options = NULL;
        char *this_opt, *endptr;
        int num_panels = ARRAY_SIZE(known_lcd_panels);
        int panel_idx = -1;

        fb_get_options(DRIVER_NAME, &options);

        if (!options)
                goto out;

        while ((this_opt = strsep(&options, ",")) != NULL) {
                /* Panel option - can be panel name,
                 * "bs" for board-switch, or number/index */
                if (!strncmp(this_opt, "panel:", 6)) {
                        int i;
                        long int li;
                        char *endptr;
                        this_opt += 6;
                        /* First check for index, which allows
                         * to short circuit this mess */
                        li = simple_strtol(this_opt, &endptr, 0);
                        if (*endptr == '\0')
                                panel_idx = (int)li;
                        else if (strcmp(this_opt, "bs") == 0)
                                panel_idx = pd->panel_index();
                        else {
                                for (i = 0; i < num_panels; i++) {
                                        if (!strcmp(this_opt,
                                                    known_lcd_panels[i].name)) {
                                                panel_idx = i;
                                                break;
                                        }
                                }
                        }
                        if ((panel_idx < 0) || (panel_idx >= num_panels))
                                print_warn("Panel %s not supported!", this_opt);
                        else
                                panel_index = panel_idx;

                } else if (strncmp(this_opt, "nohwcursor", 10) == 0)
                        nohwcursor = 1;
                else if (strncmp(this_opt, "devices:", 8) == 0) {
                        this_opt += 8;
                        device_count = simple_strtol(this_opt, &endptr, 0);
                        if ((device_count < 0) ||
                            (device_count > MAX_DEVICE_COUNT))
                                device_count = MAX_DEVICE_COUNT;
                } else if (strncmp(this_opt, "wincfg:", 7) == 0) {
                        this_opt += 7;
                        window_index = simple_strtol(this_opt, &endptr, 0);
                        if ((window_index < 0) ||
                            (window_index >= ARRAY_SIZE(windows)))
                                window_index = DEFAULT_WINDOW_INDEX;
                } else if (strncmp(this_opt, "off", 3) == 0)
                        return 1;
                else
                        print_warn("Unsupported option \"%s\"", this_opt);
        }

out:
        return 0;
}

/* AU1200 LCD controller device driver */
static int au1200fb_drv_probe(struct platform_device *dev)
{
        struct au1200fb_device *fbdev;
        struct au1200fb_platdata *pd;
        struct fb_info *fbi = NULL;
        unsigned long page;
        int bpp, plane, ret, irq;

        print_info("" DRIVER_DESC "");

        pd = dev->dev.platform_data;
        if (!pd)
                return -ENODEV;

        /* Setup driver with options */
        if (au1200fb_setup(pd))
                return -ENODEV;

        /* Point to the panel selected */
        panel = &known_lcd_panels[panel_index];
        win = &windows[window_index];

        printk(DRIVER_NAME ": Panel %d %s\n", panel_index, panel->name);
        printk(DRIVER_NAME ": Win %d %s\n", window_index, win->name);

        /* shut gcc up */
        ret = 0;
        fbdev = NULL;

        for (plane = 0; plane < device_count; ++plane) {
                bpp = winbpp(win->w[plane].mode_winctrl1);
                if (win->w[plane].xres == 0)
                        win->w[plane].xres = panel->Xres;
                if (win->w[plane].yres == 0)
                        win->w[plane].yres = panel->Yres;

                fbi = framebuffer_alloc(sizeof(struct au1200fb_device),
                                        &dev->dev);
                if (!fbi)
                        goto failed;

                _au1200fb_infos[plane] = fbi;
                fbdev = fbi->par;
                fbdev->fb_info = fbi;
                fbdev->pd = pd;

                fbdev->plane = plane;

                /* Allocate the framebuffer to the maximum screen size */
                fbdev->fb_len = (win->w[plane].xres * win->w[plane].yres * bpp) / 8;

                fbdev->fb_mem = dmam_alloc_noncoherent(&dev->dev,
                                PAGE_ALIGN(fbdev->fb_len),
                                &fbdev->fb_phys, GFP_KERNEL);
                if (!fbdev->fb_mem) {
                        print_err("fail to allocate frambuffer (size: %dK))",
                                  fbdev->fb_len / 1024);
                        return -ENOMEM;
                }

                /*
                 * Set page reserved so that mmap will work. This is necessary
                 * since we'll be remapping normal memory.
                 */
                for (page = (unsigned long)fbdev->fb_phys;
                     page < PAGE_ALIGN((unsigned long)fbdev->fb_phys +
                             fbdev->fb_len);
                     page += PAGE_SIZE) {
                        SetPageReserved(pfn_to_page(page >> PAGE_SHIFT)); /* LCD DMA is NOT coherent on Au1200 */
                }
                print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
                print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);

                /* Init FB data */
                if ((ret = au1200fb_init_fbinfo(fbdev)) < 0)
                        goto failed;

                /* Register new framebuffer */
                ret = register_framebuffer(fbi);
                if (ret < 0) {
                        print_err("cannot register new framebuffer");
                        goto failed;
                }

                au1200fb_fb_set_par(fbi);

#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
                if (plane == 0)
                        if (fb_prepare_logo(fbi, FB_ROTATE_UR)) {
                                /* Start display and show logo on boot */
                                fb_set_cmap(&fbi->cmap, fbi);
                                fb_show_logo(fbi, FB_ROTATE_UR);
                        }
#endif
        }

        /* Now hook interrupt too */
        irq = platform_get_irq(dev, 0);
        ret = request_irq(irq, au1200fb_handle_irq,
                          IRQF_SHARED, "lcd", (void *)dev);
        if (ret) {
                print_err("fail to request interrupt line %d (err: %d)",
                          irq, ret);
                goto failed;
        }

        platform_set_drvdata(dev, pd);

        /* Kickstart the panel */
        au1200_setpanel(panel, pd);

        return 0;

failed:
        /* NOTE: This only does the current plane/window that failed; others are still active */
        if (fbi) {
                if (fbi->cmap.len != 0)
                        fb_dealloc_cmap(&fbi->cmap);
                kfree(fbi->pseudo_palette);
        }
        if (plane == 0)
                free_irq(AU1200_LCD_INT, (void*)dev);
        return ret;
}

static int au1200fb_drv_remove(struct platform_device *dev)
{
        struct au1200fb_platdata *pd = platform_get_drvdata(dev);
        struct au1200fb_device *fbdev;
        struct fb_info *fbi;
        int plane;

        /* Turn off the panel */
        au1200_setpanel(NULL, pd);

        for (plane = 0; plane < device_count; ++plane)  {
                fbi = _au1200fb_infos[plane];
                fbdev = fbi->par;

                /* Clean up all probe data */
                unregister_framebuffer(fbi);
                if (fbi->cmap.len != 0)
                        fb_dealloc_cmap(&fbi->cmap);
                kfree(fbi->pseudo_palette);

                framebuffer_release(fbi);
                _au1200fb_infos[plane] = NULL;
        }

        free_irq(platform_get_irq(dev, 0), (void *)dev);

        return 0;
}

#ifdef CONFIG_PM
static int au1200fb_drv_suspend(struct device *dev)
{
        struct au1200fb_platdata *pd = dev_get_drvdata(dev);
        au1200_setpanel(NULL, pd);

        lcd->outmask = 0;
        au_sync();

        return 0;
}

static int au1200fb_drv_resume(struct device *dev)
{
        struct au1200fb_platdata *pd = dev_get_drvdata(dev);
        struct fb_info *fbi;
        int i;

        /* Kickstart the panel */
        au1200_setpanel(panel, pd);

        for (i = 0; i < device_count; i++) {
                fbi = _au1200fb_infos[i];
                au1200fb_fb_set_par(fbi);
        }

        return 0;
}

static const struct dev_pm_ops au1200fb_pmops = {
        .suspend        = au1200fb_drv_suspend,
        .resume         = au1200fb_drv_resume,
        .freeze         = au1200fb_drv_suspend,
        .thaw           = au1200fb_drv_resume,
};

#define AU1200FB_PMOPS  (&au1200fb_pmops)

#else
#define AU1200FB_PMOPS  NULL
#endif /* CONFIG_PM */

static struct platform_driver au1200fb_driver = {
        .driver = {
                .name   = "au1200-lcd",
                .owner  = THIS_MODULE,
                .pm     = AU1200FB_PMOPS,
        },
        .probe          = au1200fb_drv_probe,
        .remove         = au1200fb_drv_remove,
};

/*-------------------------------------------------------------------------*/

static int __init au1200fb_init(void)
{
        return platform_driver_register(&au1200fb_driver);
}

static void __exit au1200fb_cleanup(void)
{
        platform_driver_unregister(&au1200fb_driver);
}

module_init(au1200fb_init);
module_exit(au1200fb_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");