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|
/* leo.c: LEO frame buffer driver
*
* Copyright (C) 2003 David S. Miller (davem@redhat.com)
* Copyright (C) 1996-1999 Jakub Jelinek (jj@ultra.linux.cz)
* Copyright (C) 1997 Michal Rehacek (Michal.Rehacek@st.mff.cuni.cz)
*
* 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 leo_setcolreg(unsigned, unsigned, unsigned, unsigned,
unsigned, struct fb_info *);
static int leo_blank(int, struct fb_info *);
static int leo_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
static int leo_ioctl(struct inode *, struct file *, unsigned int,
unsigned long, struct fb_info *);
static int leo_pan_display(struct fb_var_screeninfo *, struct fb_info *);
/*
* Frame buffer operations
*/
static struct fb_ops leo_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = leo_setcolreg,
.fb_blank = leo_blank,
.fb_pan_display = leo_pan_display,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_mmap = leo_mmap,
.fb_ioctl = leo_ioctl,
.fb_cursor = soft_cursor,
};
#define LEO_OFF_LC_SS0_KRN 0x00200000UL
#define LEO_OFF_LC_SS0_USR 0x00201000UL
#define LEO_OFF_LC_SS1_KRN 0x01200000UL
#define LEO_OFF_LC_SS1_USR 0x01201000UL
#define LEO_OFF_LD_SS0 0x00400000UL
#define LEO_OFF_LD_SS1 0x01400000UL
#define LEO_OFF_LD_GBL 0x00401000UL
#define LEO_OFF_LX_KRN 0x00600000UL
#define LEO_OFF_LX_CURSOR 0x00601000UL
#define LEO_OFF_SS0 0x00800000UL
#define LEO_OFF_SS1 0x01800000UL
#define LEO_OFF_UNK 0x00602000UL
#define LEO_OFF_UNK2 0x00000000UL
#define LEO_CUR_ENABLE 0x00000080
#define LEO_CUR_UPDATE 0x00000030
#define LEO_CUR_PROGRESS 0x00000006
#define LEO_CUR_UPDATECMAP 0x00000003
#define LEO_CUR_TYPE_MASK 0x00000000
#define LEO_CUR_TYPE_IMAGE 0x00000020
#define LEO_CUR_TYPE_CMAP 0x00000050
struct leo_cursor {
u8 xxx0[16];
volatile u32 cur_type;
volatile u32 cur_misc;
volatile u32 cur_cursxy;
volatile u32 cur_data;
};
#define LEO_KRN_TYPE_CLUT0 0x00001000
#define LEO_KRN_TYPE_CLUT1 0x00001001
#define LEO_KRN_TYPE_CLUT2 0x00001002
#define LEO_KRN_TYPE_WID 0x00001003
#define LEO_KRN_TYPE_UNK 0x00001006
#define LEO_KRN_TYPE_VIDEO 0x00002003
#define LEO_KRN_TYPE_CLUTDATA 0x00004000
#define LEO_KRN_CSR_ENABLE 0x00000008
#define LEO_KRN_CSR_PROGRESS 0x00000004
#define LEO_KRN_CSR_UNK 0x00000002
#define LEO_KRN_CSR_UNK2 0x00000001
struct leo_lx_krn {
volatile u32 krn_type;
volatile u32 krn_csr;
volatile u32 krn_value;
};
struct leo_lc_ss0_krn {
volatile u32 misc;
u8 xxx0[0x800-4];
volatile u32 rev;
};
struct leo_lc_ss0_usr {
volatile u32 csr;
volatile u32 addrspace;
volatile u32 fontmsk;
volatile u32 fontt;
volatile u32 extent;
volatile u32 src;
u32 dst;
volatile u32 copy;
volatile u32 fill;
};
struct leo_lc_ss1_krn {
u8 unknown;
};
struct leo_lc_ss1_usr {
u8 unknown;
};
struct leo_ld {
u8 xxx0[0xe00];
volatile u32 csr;
volatile u32 wid;
volatile u32 wmask;
volatile u32 widclip;
volatile u32 vclipmin;
volatile u32 vclipmax;
volatile u32 pickmin; /* SS1 only */
volatile u32 pickmax; /* SS1 only */
volatile u32 fg;
volatile u32 bg;
volatile u32 src; /* Copy/Scroll (SS0 only) */
volatile u32 dst; /* Copy/Scroll/Fill (SS0 only) */
volatile u32 extent; /* Copy/Scroll/Fill size (SS0 only) */
u32 xxx1[3];
volatile u32 setsem; /* SS1 only */
volatile u32 clrsem; /* SS1 only */
volatile u32 clrpick; /* SS1 only */
volatile u32 clrdat; /* SS1 only */
volatile u32 alpha; /* SS1 only */
u8 xxx2[0x2c];
volatile u32 winbg;
volatile u32 planemask;
volatile u32 rop;
volatile u32 z;
volatile u32 dczf; /* SS1 only */
volatile u32 dczb; /* SS1 only */
volatile u32 dcs; /* SS1 only */
volatile u32 dczs; /* SS1 only */
volatile u32 pickfb; /* SS1 only */
volatile u32 pickbb; /* SS1 only */
volatile u32 dcfc; /* SS1 only */
volatile u32 forcecol; /* SS1 only */
volatile u32 door[8]; /* SS1 only */
volatile u32 pick[5]; /* SS1 only */
};
#define LEO_SS1_MISC_ENABLE 0x00000001
#define LEO_SS1_MISC_STEREO 0x00000002
struct leo_ld_ss1 {
u8 xxx0[0xef4];
volatile u32 ss1_misc;
};
struct leo_ld_gbl {
u8 unknown;
};
struct leo_par {
spinlock_t lock;
struct leo_lx_krn __iomem *lx_krn;
struct leo_lc_ss0_usr __iomem *lc_ss0_usr;
struct leo_ld_ss0 __iomem *ld_ss0;
struct leo_ld_ss1 __iomem *ld_ss1;
struct leo_cursor __iomem *cursor;
u32 extent;
u32 clut_data[256];
u32 flags;
#define LEO_FLAG_BLANKED 0x00000001
unsigned long physbase;
unsigned long fbsize;
struct sbus_dev *sdev;
struct list_head list;
};
static void leo_wait(struct leo_lx_krn __iomem *lx_krn)
{
int i;
for (i = 0;
(sbus_readl(&lx_krn->krn_csr) & LEO_KRN_CSR_PROGRESS) && i < 300000;
i++)
udelay (1); /* Busy wait at most 0.3 sec */
return;
}
/**
* leo_setcolreg - Optional function. Sets a color register.
* @regno: boolean, 0 copy local, 1 get_user() function
* @red: frame buffer colormap structure
* @green: The green value which can be up to 16 bits wide
* @blue: The blue value which can be up to 16 bits wide.
* @transp: If supported the alpha value which can be up to 16 bits wide.
* @info: frame buffer info structure
*/
static int leo_setcolreg(unsigned regno,
unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
struct leo_par *par = (struct leo_par *) info->par;
struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
unsigned long flags;
u32 val;
int i;
if (regno >= 256)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
par->clut_data[regno] = red | (green << 8) | (blue << 16);
spin_lock_irqsave(&par->lock, flags);
leo_wait(lx_krn);
sbus_writel(LEO_KRN_TYPE_CLUTDATA, &lx_krn->krn_type);
for (i = 0; i < 256; i++)
sbus_writel(
|