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/* cg6.c: CGSIX (GX, GXplus, TGX) frame buffer driver
*
* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
*
* 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/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/of_device.h>
#include <asm/io.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 void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area);
static int cg6_sync(struct fb_info *);
static int cg6_mmap(struct fb_info *, struct vm_area_struct *);
static int cg6_ioctl(struct fb_info *, unsigned int, unsigned long);
static int cg6_pan_display(struct fb_var_screeninfo *, struct fb_info *);
/*
* Frame buffer operations
*/
static struct fb_ops cg6_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = cg6_setcolreg,
.fb_blank = cg6_blank,
.fb_pan_display = cg6_pan_display,
.fb_fillrect = cg6_fillrect,
.fb_copyarea = cg6_copyarea,
.fb_imageblit = cg6_imageblit,
.fb_sync = cg6_sync,
.fb_mmap = cg6_mmap,
.fb_ioctl = cg6_ioctl,
#ifdef CONFIG_COMPAT
.fb_compat_ioctl = sbusfb_compat_ioctl,
#endif
};
/* 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
#define CG6_THC_CURSOFF ((65536-32) | ((65536-32) << 16))
/* The contents are unknown */
struct cg6_tec {
int tec_matrix;
int tec_clip;
int tec_vdc;
};
struct cg6_thc {
u32 thc_pad0[512];
u32 thc_hs; /* hsync timing */
u32 thc_hsdvs;
u32 thc_hd;
u32 thc_vs; /* vsync timing */
u32 thc_vd;
u32 thc_refresh;
u32 thc_misc;
u32 thc_pad1[56];
u32 thc_cursxy; /* cursor x,y position (16 bits each) */
u32 thc_cursmask[32]; /* cursor mask bits */
u32 thc_cursbits[32]; /* what to show where mask enabled */
};
struct cg6_fbc {
u32 xxx0[1];
u32 mode;
u32 clip;
u32 xxx1[1];
u32 s;
u32 draw;
u32 blit;
u32 font;
u32 xxx2[24];
u32 x0, y0, z0, color0;
u32 x1, y1, z1, color1;
u32 x2, y2, z2, color2;
u32 x3, y3, z3, color3;
u32 offx, offy;
u32 xxx3[2];
u32 incx, incy;
u32 xxx4[2];
u32 clipminx, clipminy;
u32 xxx5[2];
u32 clipmaxx, clipmaxy;
u32 xxx6[2];
u32 fg;
u32 bg;
u32 alu;
u32 pm;
u32 pixelm;
u32 xxx7[2];
u32 patalign;
u32 pattern[8];
u32 xxx8[432];
u32 apointx, apointy, apointz;
u32 xxx9[1];
u32 rpointx, rpointy, rpointz;
u32 xxx10[5];
u32 pointr, pointg, pointb, pointa;
u32 alinex, aliney, alinez;
u32 xxx11[1];
u32 rlinex, rliney, rlinez;
u32 xxx12[5];
u32 liner, lineg, lineb, linea;
u32 atrix, atriy, atriz;
u32 xxx13
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