au1200fb.c

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

#ifdef CONFIG_PM
#include <asm/mach-au1x00/au1xxx_pm.h>
#endif

#ifndef CONFIG_FB_AU1200_DEVS
#define CONFIG_FB_AU1200_DEVS 4
#endif

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

#define DEBUG 1

#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 */

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

static struct au1200fb_device _au1200fb_devices[CONFIG_FB_AU1200_DEVS];
/********************************************************************/

/* 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

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

static struct au1200_lcd *lcd = (struct au1200_lcd *) AU1200_LCD_ADDR;
static int window_index = 2; /* 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

extern int board_au1200fb_panel_init (void);
extern int board_au1200fb_panel_shutdown (void);

#ifdef CONFIG_PM
int au1200fb_pm_callback(au1xxx_power_dev_t *dev,
		au1xxx_request_t request, void *data);
au1xxx_power_dev_t *LCD_pm_dev;
#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;
	int (*device_init)(void);
	int (*device_shutdown)(void);
#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 */
		.device_init		= NULL,
		.device_shutdown	= NULL,
		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 */
		.device_init		= NULL,
		.device_shutdown	= NULL,
		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 */
		.device_init		= NULL,
		.device_shutdown	= NULL,
		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 */