cg6.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 804 行 · 第 1/2 页

/* cg6.c: CGSIX (GX, GXplus, TGX) frame buffer driver
 *
 * Copyright (C) 2003 David S. Miller ([e-mail])
 * Copyright (C) 1996,1998 Jakub Jelinek ([e-mail])
 * Copyright (C) 1996 Miguel de Icaza ([e-mail])
 * Copyright (C) 1996 Eddie C. Dost ([e-mail])
 *
 * Driver layout based loosely on tgafb.c, see that file for credits.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>

#include <asm/io.h>
#include <asm/sbus.h>
#include <asm/oplib.h>
#include <asm/fbio.h>

#include "sbuslib.h"

/*
 * Local functions.
 */

static int cg6_setcolreg(unsigned, unsigned, unsigned, unsigned,
			 unsigned, struct fb_info *);
static int cg6_blank(int, struct fb_info *);

static void cg6_imageblit(struct fb_info *, const struct fb_image *);
static void cg6_fillrect(struct fb_info *, const struct fb_fillrect *);
static int cg6_sync(struct fb_info *);
static int cg6_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
static int cg6_ioctl(struct inode *, struct file *, unsigned int,
		     unsigned long, struct fb_info *);

/*
 *  Frame buffer operations
 */

static struct fb_ops cg6_ops = {
	.owner			= THIS_MODULE,
	.fb_setcolreg		= cg6_setcolreg,
	.fb_blank		= cg6_blank,
	.fb_fillrect		= cg6_fillrect,
	.fb_copyarea		= cfb_copyarea,
	.fb_imageblit		= cg6_imageblit,
	.fb_sync		= cg6_sync,
	.fb_mmap		= cg6_mmap,
	.fb_ioctl		= cg6_ioctl,
	.fb_cursor		= soft_cursor,
};

/* Offset of interesting structures in the OBIO space */
/*
 * Brooktree is the video dac and is funny to program on the cg6.
 * (it's even funnier on the cg3)
 * The FBC could be the frame buffer control
 * The FHC could is the frame buffer hardware control.
 */
#define CG6_ROM_OFFSET       0x0UL
#define CG6_BROOKTREE_OFFSET 0x200000UL
#define CG6_DHC_OFFSET       0x240000UL
#define CG6_ALT_OFFSET       0x280000UL
#define CG6_FHC_OFFSET       0x300000UL
#define CG6_THC_OFFSET       0x301000UL
#define CG6_FBC_OFFSET       0x700000UL
#define CG6_TEC_OFFSET       0x701000UL
#define CG6_RAM_OFFSET       0x800000UL

/* FHC definitions */
#define CG6_FHC_FBID_SHIFT           24
#define CG6_FHC_FBID_MASK            255
#define CG6_FHC_REV_SHIFT            20
#define CG6_FHC_REV_MASK             15
#define CG6_FHC_FROP_DISABLE         (1 << 19)
#define CG6_FHC_ROW_DISABLE          (1 << 18)
#define CG6_FHC_SRC_DISABLE          (1 << 17)
#define CG6_FHC_DST_DISABLE          (1 << 16)
#define CG6_FHC_RESET                (1 << 15)
#define CG6_FHC_LITTLE_ENDIAN        (1 << 13)
#define CG6_FHC_RES_MASK             (3 << 11)
#define CG6_FHC_1024                 (0 << 11)
#define CG6_FHC_1152                 (1 << 11)
#define CG6_FHC_1280                 (2 << 11)
#define CG6_FHC_1600                 (3 << 11)
#define CG6_FHC_CPU_MASK             (3 << 9)
#define CG6_FHC_CPU_SPARC            (0 << 9)
#define CG6_FHC_CPU_68020            (1 << 9)
#define CG6_FHC_CPU_386              (2 << 9)
#define CG6_FHC_TEST		     (1 << 8)
#define CG6_FHC_TEST_X_SHIFT	     4
#define CG6_FHC_TEST_X_MASK	     15
#define CG6_FHC_TEST_Y_SHIFT	     0
#define CG6_FHC_TEST_Y_MASK	     15

/* FBC mode definitions */
#define CG6_FBC_BLIT_IGNORE		0x00000000
#define CG6_FBC_BLIT_NOSRC		0x00100000
#define CG6_FBC_BLIT_SRC		0x00200000
#define CG6_FBC_BLIT_ILLEGAL		0x00300000
#define CG6_FBC_BLIT_MASK		0x00300000

#define CG6_FBC_VBLANK			0x00080000

#define CG6_FBC_MODE_IGNORE		0x00000000
#define CG6_FBC_MODE_COLOR8		0x00020000
#define CG6_FBC_MODE_COLOR1		0x00040000
#define CG6_FBC_MODE_HRMONO		0x00060000
#define CG6_FBC_MODE_MASK		0x00060000

#define CG6_FBC_DRAW_IGNORE		0x00000000
#define CG6_FBC_DRAW_RENDER		0x00008000
#define CG6_FBC_DRAW_PICK		0x00010000
#define CG6_FBC_DRAW_ILLEGAL		0x00018000
#define CG6_FBC_DRAW_MASK		0x00018000

#define CG6_FBC_BWRITE0_IGNORE		0x00000000
#define CG6_FBC_BWRITE0_ENABLE		0x00002000
#define CG6_FBC_BWRITE0_DISABLE		0x00004000
#define CG6_FBC_BWRITE0_ILLEGAL		0x00006000
#define CG6_FBC_BWRITE0_MASK		0x00006000

#define CG6_FBC_BWRITE1_IGNORE		0x00000000
#define CG6_FBC_BWRITE1_ENABLE		0x00000800
#define CG6_FBC_BWRITE1_DISABLE		0x00001000
#define CG6_FBC_BWRITE1_ILLEGAL		0x00001800
#define CG6_FBC_BWRITE1_MASK		0x00001800

#define CG6_FBC_BREAD_IGNORE		0x00000000
#define CG6_FBC_BREAD_0			0x00000200
#define CG6_FBC_BREAD_1			0x00000400
#define CG6_FBC_BREAD_ILLEGAL		0x00000600
#define CG6_FBC_BREAD_MASK		0x00000600

#define CG6_FBC_BDISP_IGNORE		0x00000000
#define CG6_FBC_BDISP_0			0x00000080
#define CG6_FBC_BDISP_1			0x00000100
#define CG6_FBC_BDISP_ILLEGAL		0x00000180
#define CG6_FBC_BDISP_MASK		0x00000180

#define CG6_FBC_INDEX_MOD		0x00000040
#define CG6_FBC_INDEX_MASK		0x00000030

/* THC definitions */
#define CG6_THC_MISC_REV_SHIFT       16
#define CG6_THC_MISC_REV_MASK        15
#define CG6_THC_MISC_RESET           (1 << 12)
#define CG6_THC_MISC_VIDEO           (1 << 10)
#define CG6_THC_MISC_SYNC            (1 << 9)
#define CG6_THC_MISC_VSYNC           (1 << 8)
#define CG6_THC_MISC_SYNC_ENAB       (1 << 7)
#define CG6_THC_MISC_CURS_RES        (1 << 6)
#define CG6_THC_MISC_INT_ENAB        (1 << 5)
#define CG6_THC_MISC_INT             (1 << 4)
#define CG6_THC_MISC_INIT            0x9f

/* The contents are unknown */
struct cg6_tec {
	volatile int tec_matrix;
	volatile int tec_clip;
	volatile int tec_vdc;
};

struct cg6_thc {
        uint thc_pad0[512];
	volatile uint thc_hs;		/* hsync timing */
	volatile uint thc_hsdvs;
	volatile uint thc_hd;
	volatile uint thc_vs;		/* vsync timing */
	volatile uint thc_vd;
	volatile uint thc_refresh;
	volatile uint thc_misc;
	uint thc_pad1[56];
	volatile uint thc_cursxy;	/* cursor x,y position (16 bits each) */
	volatile uint thc_cursmask[32];	/* cursor mask bits */
	volatile uint thc_cursbits[32];	/* what to show where mask enabled */
};

struct cg6_fbc {
	u32		xxx0[1];
	volatile u32	mode;
	volatile u32	clip;
	u32		xxx1[1];	    
	volatile u32	s;
	volatile u32	draw;
	volatile u32	blit;
	volatile u32	font;
	u32		xxx2[24];
	volatile u32	x0, y0, z0, color0;
	volatile u32	x1, y1, z1, color1;
	volatile u32	x2, y2, z2, color2;
	volatile u32	x3, y3, z3, color3;
	volatile u32	offx, offy;
	u32		xxx3[2];
	volatile u32	incx, incy;
	u32		xxx4[2];
	volatile u32	clipminx, clipminy;
	u32		xxx5[2];
	volatile u32	clipmaxx, clipmaxy;
	u32		xxx6[2];
	volatile u32	fg;
	volatile u32	bg;
	volatile u32	alu;
	volatile u32	pm;
	volatile u32	pixelm;
	u32		xxx7[2];
	volatile u32	patalign;
	volatile u32	pattern[8];
	u32		xxx8[432];
	volatile u32	apointx, apointy, apointz;
	u32		xxx9[1];
	volatile u32	rpointx, rpointy, rpointz;
	u32		xxx10[5];
	volatile u32	pointr, pointg, pointb, pointa;
	volatile u32	alinex, aliney, alinez;
	u32		xxx11[1];
	volatile u32	rlinex, rliney, rlinez;
	u32		xxx12[5];
	volatile u32	liner, lineg, lineb, linea;
	volatile u32	atrix, atriy, atriz;
	u32		xxx13[1];
	volatile u32	rtrix, rtriy, rtriz;
	u32		xxx14[5];
	volatile u32	trir, trig, trib, tria;
	volatile u32	aquadx, aquady, aquadz;
	u32		xxx15[1];
	volatile u32	rquadx, rquady, rquadz;
	u32		xxx16[5];
	volatile u32	quadr, quadg, quadb, quada;
	volatile u32	arectx, arecty, arectz;
	u32		xxx17[1];
	volatile u32	rrectx, rrecty, rrectz;
	u32		xxx18[5];
	volatile u32	rectr, rectg, rectb, recta;
};

struct bt_regs {
	volatile u32 addr;
	volatile u32 color_map;
	volatile u32 control;
	volatile u32 cursor;
};

struct cg6_par {
	spinlock_t		lock;
	struct bt_regs		*bt;
	struct cg6_fbc		*fbc;
	struct cg6_thc		*thc;
	struct cg6_tec		*tec;
	volatile u32		*fhc;

	u32			flags;
#define CG6_FLAG_BLANKED	0x00000001

	unsigned long		physbase;
	unsigned long		fbsize;

	struct sbus_dev		*sdev;
	struct list_head	list;
};

static int cg6_sync(struct fb_info *info)
{
	struct cg6_par *par = (struct cg6_par *) info->par;
	struct cg6_fbc *fbc = par->fbc;
	int limit = 10000;

	do {
		if (!(sbus_readl(&fbc->s) & 0x10000000))
			break;
		udelay(10);
	} while (--limit > 0);

	return 0;
}

/**
 *      cg6_fillrect - REQUIRED function. Can use generic routines if 
 *                     non acclerated hardware and packed pixel based.
 *                     Draws a rectangle on the screen.               
 *
 *      @info: frame buffer structure that represents a single frame buffer
 *      @rect: structure defining the rectagle and operation.
 */
static void cg6_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
	struct cg6_par *par = (struct cg6_par *) info->par;
	struct cg6_fbc *fbc = par->fbc;
	unsigned long flags;
	s32 val;

	/* XXX doesn't handle ROP_XOR */

	spin_lock_irqsave(&par->lock, flags);
	cg6_sync(info);
	sbus_writel(rect->color, &fbc->fg);
	sbus_writel(~(u32)0, &fbc->pixelm);
	sbus_writel(0xea80ff00, &fbc->alu);
	sbus_writel(0, &fbc->s);
	sbus_writel(0, &fbc->clip);
	sbus_writel(~(u32)0, &fbc->pm);
	sbus_writel(rect->dy, &fbc->arecty);
	sbus_writel(rect->dx, &fbc->arectx);
	sbus_writel(rect->dy + rect->height, &fbc->arecty);
	sbus_writel(rect->dx + rect->width, &fbc->arectx);
	do {
		val = sbus_readl(&fbc->draw);
	} while (val < 0 && (val & 0x20000000));
	spin_unlock_irqrestore(&par->lock, flags);
}

/**
 *      cg6_imageblit - REQUIRED function. Can use generic routines if
 *                      non acclerated hardware and packed pixel based.
 *                      Copies a image from system memory to the screen. 
 *
 *      @info: frame buffer structure that represents a single frame buffer
 *      @image: structure defining the image.
 */
static void cg6_imageblit(struct fb_info *info, const struct fb_image *image)
{
	struct cg6_par *par = (struct cg6_par *) info->par;
	struct cg6_fbc *fbc = par->fbc;
	const u8 *data = image->data;
	unsigned long flags;
	u32 x, y;
	int i, width;

	if (image->depth > 1) {
		cfb_imageblit(info, image);
		return;
	}

	spin_lock_irqsave(&par->lock, flags);

	cg6_sync(info);

	sbus_writel(image->fg_color, &fbc->fg);
	sbus_writel(image->bg_color, &fbc->bg);
	sbus_writel(0x140000, &fbc->mode);
	sbus_writel(0xe880fc30, &fbc->alu);
	sbus_writel(~(u32)0, &fbc->pixelm);
	sbus_writel(0, &fbc->s);
	sbus_writel(0, &fbc->clip);
	sbus_writel(0xff, &fbc->pm);
	sbus_writel(32, &fbc->incx);
	sbus_writel(0, &fbc->incy);

	x = image->dx;
	y = image->dy;
	for (i = 0; i < image->height; i++) {
		width = image->width;

		while (width >= 32) {
			u32 val;

			sbus_writel(y, &fbc->y0);
			sbus_writel(x, &fbc->x0);
			sbus_writel(x + 32 - 1, &fbc->x1);
			
			val = ((u32)data[0] << 24) |
			      ((u32)data[1] << 16) |
			      ((u32)data[2] <<  8) |
			      ((u32)data[3] <<  0);
			sbus_writel(val, &fbc->font);

			data += 4;
			x += 32;
			width -= 32;
		}
		if (width) {
			u32 val;

			sbus_writel(y, &fbc->y0);
			sbus_writel(x, &fbc->x0);
			sbus_writel(x + width - 1, &fbc->x1);
			if (width <= 8) {
				val = (u32) data[0] << 24;
				data += 1;
			} else if (width <= 16) {
				val = ((u32) data[0] << 24) |
				      ((u32) data[1] << 16);
				data += 2;
			} else {
				val = ((u32) data[0] << 24) |
				      ((u32) data[1] << 16) |
				      ((u32) data[2] <<  8);
				data += 3;
			}
			sbus_writel(val, &fbc->font);
		}

		y += 1;
		x = image->dx;
	}