// SPDX-License-Identifier: GPL-2.0-only
/* leo.c: LEO frame buffer driver
*
* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
* 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/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/platform_device.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_pan_display(struct fb_var_screeninfo *, struct fb_info *);
static int leo_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma);
static int leo_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg);
/*
* Frame buffer operations
*/
static const struct fb_ops leo_ops = {
.owner = THIS_MODULE,
FB_DEFAULT_SBUS_OPS(leo),
.fb_setcolreg = leo_setcolreg,
.fb_blank = leo_blank,
.fb_pan_display = leo_pan_display,
};
#define LEO_OFF_LC_SS0_KRN 0 x00200000UL
#define LEO_OFF_LC_SS0_USR 0 x00201000UL
#define LEO_OFF_LC_SS1_KRN 0 x01200000UL
#define LEO_OFF_LC_SS1_USR 0 x01201000UL
#define LEO_OFF_LD_SS0 0 x00400000UL
#define LEO_OFF_LD_SS1 0 x01400000UL
#define LEO_OFF_LD_GBL 0 x00401000UL
#define LEO_OFF_LX_KRN 0 x00600000UL
#define LEO_OFF_LX_CURSOR 0 x00601000UL
#define LEO_OFF_SS0 0 x00800000UL
#define LEO_OFF_SS1 0 x01800000UL
#define LEO_OFF_UNK 0 x00602000UL
#define LEO_OFF_UNK2 0 x00000000UL
#define LEO_CUR_ENABLE 0 x00000080
#define LEO_CUR_UPDATE 0 x00000030
#define LEO_CUR_PROGRESS 0 x00000006
#define LEO_CUR_UPDATECMAP 0 x00000003
#define LEO_CUR_TYPE_MASK 0 x00000000
#define LEO_CUR_TYPE_IMAGE 0 x00000020
#define LEO_CUR_TYPE_CMAP 0 x00000050
struct leo_cursor {
u8 xxx0[16 ];
u32 cur_type;
u32 cur_misc;
u32 cur_cursxy;
u32 cur_data;
};
#define LEO_KRN_TYPE_CLUT0 0 x00001000
#define LEO_KRN_TYPE_CLUT1 0 x00001001
#define LEO_KRN_TYPE_CLUT2 0 x00001002
#define LEO_KRN_TYPE_WID 0 x00001003
#define LEO_KRN_TYPE_UNK 0 x00001006
#define LEO_KRN_TYPE_VIDEO 0 x00002003
#define LEO_KRN_TYPE_CLUTDATA 0 x00004000
#define LEO_KRN_CSR_ENABLE 0 x00000008
#define LEO_KRN_CSR_PROGRESS 0 x00000004
#define LEO_KRN_CSR_UNK 0 x00000002
#define LEO_KRN_CSR_UNK2 0 x00000001
struct leo_lx_krn {
u32 krn_type;
u32 krn_csr;
u32 krn_value;
};
struct leo_lc_ss0_krn {
u32 misc;
u8 xxx0[0 x800-4 ];
u32 rev;
};
struct leo_lc_ss0_usr {
u32 csr;
u32 addrspace;
u32 fontmsk;
u32 fontt;
u32 extent;
u32 src;
u32 dst;
u32 copy;
u32 fill;
};
struct leo_lc_ss1_krn {
u8 unknown;
};
struct leo_lc_ss1_usr {
u8 unknown;
};
struct leo_ld_ss0 {
u8 xxx0[0 xe00];
u32 csr;
u32 wid;
u32 wmask;
u32 widclip;
u32 vclipmin;
u32 vclipmax;
u32 pickmin; /* SS1 only */
u32 pickmax; /* SS1 only */
u32 fg;
u32 bg;
u32 src; /* Copy/Scroll (SS0 only) */
u32 dst; /* Copy/Scroll/Fill (SS0 only) */
u32 extent; /* Copy/Scroll/Fill size (SS0 only) */
u32 xxx1[3 ];
u32 setsem; /* SS1 only */
u32 clrsem; /* SS1 only */
u32 clrpick; /* SS1 only */
u32 clrdat; /* SS1 only */
u32 alpha; /* SS1 only */
u8 xxx2[0 x2c];
u32 winbg;
u32 planemask;
u32 rop;
u32 z;
u32 dczf; /* SS1 only */
u32 dczb; /* SS1 only */
u32 dcs; /* SS1 only */
u32 dczs; /* SS1 only */
u32 pickfb; /* SS1 only */
u32 pickbb; /* SS1 only */
u32 dcfc; /* SS1 only */
u32 forcecol; /* SS1 only */
u32 door[8 ]; /* SS1 only */
u32 pick[5 ]; /* SS1 only */
};
#define LEO_SS1_MISC_ENABLE 0 x00000001
#define LEO_SS1_MISC_STEREO 0 x00000002
struct leo_ld_ss1 {
u8 xxx0[0 xef4];
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 0 x00000001
unsigned long which_io;
};
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 ;
}
static void leo_switch_from_graph(struct fb_info *info)
{
struct leo_par *par = (struct leo_par *) info->par;
struct leo_ld_ss0 __iomem *ss = par->ld_ss0;
struct leo_cursor __iomem *cursor = par->cursor;
unsigned long flags;
u32 val;
spin_lock_irqsave(&par->lock, flags);
par->extent = ((info->var.xres - 1 ) |
((info->var.yres - 1 ) << 16 ));
sbus_writel(0 xffffffff, &ss->wid);
sbus_writel(0 xffff, &ss->wmask);
sbus_writel(0 , &ss->vclipmin);
sbus_writel(par->extent, &ss->vclipmax);
sbus_writel(0 , &ss->fg);
sbus_writel(0 xff000000, &ss->planemask);
sbus_writel(0 x310850, &ss->rop);
sbus_writel(0 , &ss->widclip);
sbus_writel((info->var.xres-1 ) | ((info->var.yres-1 ) << 11 ),
&par->lc_ss0_usr->extent);
sbus_writel(4 , &par->lc_ss0_usr->addrspace);
sbus_writel(0 x80000000, &par->lc_ss0_usr->fill);
sbus_writel(0 , &par->lc_ss0_usr->fontt);
do {
val = sbus_readl(&par->lc_ss0_usr->csr);
} while (val & 0 x20000000);
/* setup screen buffer for cfb_* functions */
sbus_writel(1 , &ss->wid);
sbus_writel(0 x00ffffff, &ss->planemask);
sbus_writel(0 x310b90, &ss->rop);
sbus_writel(0 , &par->lc_ss0_usr->addrspace);
/* hide cursor */
sbus_writel(sbus_readl(&cursor->cur_misc) & ~LEO_CUR_ENABLE, &cursor->cur_misc);
spin_unlock_irqrestore(&par->lock, flags);
}
static int leo_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
/* We just use this to catch switches out of
* graphics mode.
*/
leo_switch_from_graph(info);
if (var->xoffset || var->yoffset || var->vmode)
return -EINVAL;
return 0 ;
}
/**
* 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(par->clut_data[i], &lx_krn->krn_value);
sbus_writel(LEO_KRN_TYPE_CLUT0, &lx_krn->krn_type);
val = sbus_readl(&lx_krn->krn_csr);
val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
sbus_writel(val, &lx_krn->krn_csr);
spin_unlock_irqrestore(&par->lock, flags);
return 0 ;
}
/**
* leo_blank - Optional function. Blanks the display.
* @blank: the blank mode we want.
* @info: frame buffer structure that represents a single frame buffer
*/
static int leo_blank(int blank, 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;
spin_lock_irqsave(&par->lock, flags);
switch (blank) {
case FB_BLANK_UNBLANK: /* Unblanking */
val = sbus_readl(&lx_krn->krn_csr);
val |= LEO_KRN_CSR_ENABLE;
sbus_writel(val, &lx_krn->krn_csr);
par->flags &= ~LEO_FLAG_BLANKED;
break ;
case FB_BLANK_NORMAL: /* Normal blanking */
case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
case FB_BLANK_POWERDOWN: /* Poweroff */
val = sbus_readl(&lx_krn->krn_csr);
val &= ~LEO_KRN_CSR_ENABLE;
sbus_writel(val, &lx_krn->krn_csr);
par->flags |= LEO_FLAG_BLANKED;
break ;
}
spin_unlock_irqrestore(&par->lock, flags);
return 0 ;
}
static const struct sbus_mmap_map leo_mmap_map[] = {
{
.voff = LEO_SS0_MAP,
.poff = LEO_OFF_SS0,
.size = 0 x800000
},
{
.voff = LEO_LC_SS0_USR_MAP,
.poff = LEO_OFF_LC_SS0_USR,
.size = 0 x1000
},
{
.voff = LEO_LD_SS0_MAP,
.poff = LEO_OFF_LD_SS0,
.size = 0 x1000
},
{
.voff = LEO_LX_CURSOR_MAP,
.poff = LEO_OFF_LX_CURSOR,
.size = 0 x1000
},
{
.voff = LEO_SS1_MAP,
.poff = LEO_OFF_SS1,
.size = 0 x800000
},
{
.voff = LEO_LC_SS1_USR_MAP,
.poff = LEO_OFF_LC_SS1_USR,
.size = 0 x1000
},
{
.voff = LEO_LD_SS1_MAP,
.poff = LEO_OFF_LD_SS1,
.size = 0 x1000
},
{
.voff = LEO_UNK_MAP,
.poff = LEO_OFF_UNK,
.size = 0 x1000
},
{
.voff = LEO_LX_KRN_MAP,
.poff = LEO_OFF_LX_KRN,
.size = 0 x1000
},
{
.voff = LEO_LC_SS0_KRN_MAP,
.poff = LEO_OFF_LC_SS0_KRN,
.size = 0 x1000
},
{
.voff = LEO_LC_SS1_KRN_MAP,
.poff = LEO_OFF_LC_SS1_KRN,
.size = 0 x1000
},
{
.voff = LEO_LD_GBL_MAP,
.poff = LEO_OFF_LD_GBL,
.size = 0 x1000
},
{
.voff = LEO_UNK2_MAP,
.poff = LEO_OFF_UNK2,
.size = 0 x100000
},
{ .size = 0 }
};
static int leo_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct leo_par *par = (struct leo_par *)info->par;
return sbusfb_mmap_helper(leo_mmap_map,
info->fix.smem_start, info->fix.smem_len,
par->which_io, vma);
}
static int leo_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
{
return sbusfb_ioctl_helper(cmd, arg, info,
FBTYPE_SUNLEO, 32 , info->fix.smem_len);
}
/*
* Initialisation
*/
static void
leo_init_fix(struct fb_info *info, struct device_node *dp)
{
snprintf(info->fix.id, sizeof (info->fix.id), "%pOFn" , dp);
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = FB_VISUAL_TRUECOLOR;
info->fix.line_length = 8192 ;
info->fix.accel = FB_ACCEL_SUN_LEO;
}
static void leo_wid_put(struct fb_info *info, struct fb_wid_list *wl)
{
struct leo_par *par = (struct leo_par *) info->par;
struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
struct fb_wid_item *wi;
unsigned long flags;
u32 val;
int i, j;
spin_lock_irqsave(&par->lock, flags);
leo_wait(lx_krn);
for (i = 0 , wi = wl->wl_list; i < wl->wl_count; i++, wi++) {
switch (wi->wi_type) {
case FB_WID_DBL_8:
j = (wi->wi_index & 0 xf) + 0 x40;
break ;
case FB_WID_DBL_24:
j = wi->wi_index & 0 x3f;
break ;
default :
continue ;
}
sbus_writel(0 x5800 + j, &lx_krn->krn_type);
sbus_writel(wi->wi_values[0 ], &lx_krn->krn_value);
}
sbus_writel(LEO_KRN_TYPE_WID, &lx_krn->krn_type);
val = sbus_readl(&lx_krn->krn_csr);
val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
sbus_writel(val, &lx_krn->krn_csr);
spin_unlock_irqrestore(&par->lock, flags);
}
static void leo_init_wids(struct fb_info *info)
{
struct fb_wid_item wi;
struct fb_wid_list wl;
wl.wl_count = 1 ;
wl.wl_list = &wi;
wi.wi_type = FB_WID_DBL_8;
wi.wi_index = 0 ;
wi.wi_values [0 ] = 0 x2c0;
leo_wid_put(info, &wl);
wi.wi_index = 1 ;
wi.wi_values [0 ] = 0 x30;
leo_wid_put(info, &wl);
wi.wi_index = 2 ;
wi.wi_values [0 ] = 0 x20;
leo_wid_put(info, &wl);
wi.wi_type = FB_WID_DBL_24;
wi.wi_index = 1 ;
wi.wi_values [0 ] = 0 x30;
leo_wid_put(info, &wl);
}
static void leo_init_hw(struct fb_info *info)
{
struct leo_par *par = (struct leo_par *) info->par;
u32 val;
val = sbus_readl(&par->ld_ss1->ss1_misc);
val |= LEO_SS1_MISC_ENABLE;
sbus_writel(val, &par->ld_ss1->ss1_misc);
leo_switch_from_graph(info);
}
static void leo_fixup_var_rgb(struct fb_var_screeninfo *var)
{
var->red.offset = 0 ;
var->red.length = 8 ;
var->green.offset = 8 ;
var->green.length = 8 ;
var->blue.offset = 16 ;
var->blue.length = 8 ;
var->transp.offset = 0 ;
var->transp.length = 0 ;
}
static void leo_unmap_regs(struct platform_device *op, struct fb_info *info,
struct leo_par *par)
{
if (par->lc_ss0_usr)
of_iounmap(&op->resource[0 ], par->lc_ss0_usr, 0 x1000);
if (par->ld_ss0)
of_iounmap(&op->resource[0 ], par->ld_ss0, 0 x1000);
if (par->ld_ss1)
of_iounmap(&op->resource[0 ], par->ld_ss1, 0 x1000);
if (par->lx_krn)
of_iounmap(&op->resource[0 ], par->lx_krn, 0 x1000);
if (par->cursor)
of_iounmap(&op->resource[0 ],
par->cursor, sizeof (struct leo_cursor));
if (info->screen_base)
of_iounmap(&op->resource[0 ], info->screen_base, 0 x800000);
}
static int leo_probe(struct platform_device *op)
{
struct device_node *dp = op->dev.of_node;
struct fb_info *info;
struct leo_par *par;
int linebytes, err;
info = framebuffer_alloc(sizeof (struct leo_par), &op->dev);
err = -ENOMEM;
if (!info)
goto out_err;
par = info->par;
spin_lock_init(&par->lock);
info->fix.smem_start = op->resource[0 ].start;
par->which_io = op->resource[0 ].flags & IORESOURCE_BITS;
sbusfb_fill_var(&info->var, dp, 32 );
leo_fixup_var_rgb(&info->var);
linebytes = of_getintprop_default(dp, "linebytes" ,
info->var.xres);
info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
par->lc_ss0_usr =
of_ioremap(&op->resource[0 ], LEO_OFF_LC_SS0_USR,
0 x1000, "leolc ss0usr" );
par->ld_ss0 =
of_ioremap(&op->resource[0 ], LEO_OFF_LD_SS0,
0 x1000, "leold ss0" );
par->ld_ss1 =
of_ioremap(&op->resource[0 ], LEO_OFF_LD_SS1,
0 x1000, "leold ss1" );
par->lx_krn =
of_ioremap(&op->resource[0 ], LEO_OFF_LX_KRN,
0 x1000, "leolx krn" );
par->cursor =
of_ioremap(&op->resource[0 ], LEO_OFF_LX_CURSOR,
sizeof (struct leo_cursor), "leolx cursor" );
info->screen_base =
of_ioremap(&op->resource[0 ], LEO_OFF_SS0,
0 x800000, "leo ram" );
if (!par->lc_ss0_usr ||
!par->ld_ss0 ||
!par->ld_ss1 ||
!par->lx_krn ||
!par->cursor ||
!info->screen_base)
goto out_unmap_regs;
info->fbops = &leo_ops;
info->pseudo_palette = par->clut_data;
leo_init_wids(info);
leo_init_hw(info);
leo_blank(FB_BLANK_UNBLANK, info);
if (fb_alloc_cmap(&info->cmap, 256 , 0 ))
goto out_unmap_regs;
leo_init_fix(info, dp);
err = register_framebuffer(info);
if (err < 0 )
goto out_dealloc_cmap;
dev_set_drvdata(&op->dev, info);
printk(KERN_INFO "%pOF: leo at %lx:%lx\n" ,
dp,
par->which_io, info->fix.smem_start);
return 0 ;
out_dealloc_cmap:
fb_dealloc_cmap(&info->cmap);
out_unmap_regs:
leo_unmap_regs(op, info, par);
framebuffer_release(info);
out_err:
return err;
}
static void leo_remove(struct platform_device *op)
{
struct fb_info *info = dev_get_drvdata(&op->dev);
struct leo_par *par = info->par;
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
leo_unmap_regs(op, info, par);
framebuffer_release(info);
}
static const struct of_device_id leo_match[] = {
{
.name = "SUNW,leo" ,
},
{},
};
MODULE_DEVICE_TABLE(of, leo_match);
static struct platform_driver leo_driver = {
.driver = {
.name = "leo" ,
.of_match_table = leo_match,
},
.probe = leo_probe,
.remove = leo_remove,
};
static int __init leo_init(void )
{
if (fb_get_options("leofb" , NULL))
return -ENODEV;
return platform_driver_register(&leo_driver);
}
static void __exit leo_exit(void )
{
platform_driver_unregister(&leo_driver);
}
module_init(leo_init);
module_exit(leo_exit);
MODULE_DESCRIPTION("framebuffer driver for LEO chipsets" );
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>" );
MODULE_VERSION("2.0" );
MODULE_LICENSE("GPL" );
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