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linux-sg2042/drivers/video/tcx.c

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/* tcx.c: TCX frame buffer driver
*
* Copyright (C) 2003 David S. Miller (davem@redhat.com)
* 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/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 tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
unsigned, struct fb_info *);
static int tcx_blank(int, struct fb_info *);
static int tcx_mmap(struct fb_info *, struct vm_area_struct *);
static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
/*
* Frame buffer operations
*/
static struct fb_ops tcx_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = tcx_setcolreg,
.fb_blank = tcx_blank,
.fb_pan_display = tcx_pan_display,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_mmap = tcx_mmap,
.fb_ioctl = tcx_ioctl,
#ifdef CONFIG_COMPAT
.fb_compat_ioctl = sbusfb_compat_ioctl,
#endif
};
/* THC definitions */
#define TCX_THC_MISC_REV_SHIFT 16
#define TCX_THC_MISC_REV_MASK 15
#define TCX_THC_MISC_VSYNC_DIS (1 << 25)
#define TCX_THC_MISC_HSYNC_DIS (1 << 24)
#define TCX_THC_MISC_RESET (1 << 12)
#define TCX_THC_MISC_VIDEO (1 << 10)
#define TCX_THC_MISC_SYNC (1 << 9)
#define TCX_THC_MISC_VSYNC (1 << 8)
#define TCX_THC_MISC_SYNC_ENAB (1 << 7)
#define TCX_THC_MISC_CURS_RES (1 << 6)
#define TCX_THC_MISC_INT_ENAB (1 << 5)
#define TCX_THC_MISC_INT (1 << 4)
#define TCX_THC_MISC_INIT 0x9f
#define TCX_THC_REV_REV_SHIFT 20
#define TCX_THC_REV_REV_MASK 15
#define TCX_THC_REV_MINREV_SHIFT 28
#define TCX_THC_REV_MINREV_MASK 15
/* The contents are unknown */
struct tcx_tec {
volatile u32 tec_matrix;
volatile u32 tec_clip;
volatile u32 tec_vdc;
};
struct tcx_thc {
volatile u32 thc_rev;
u32 thc_pad0[511];
volatile u32 thc_hs; /* hsync timing */
volatile u32 thc_hsdvs;
volatile u32 thc_hd;
volatile u32 thc_vs; /* vsync timing */
volatile u32 thc_vd;
volatile u32 thc_refresh;
volatile u32 thc_misc;
u32 thc_pad1[56];
volatile u32 thc_cursxy; /* cursor x,y position (16 bits each) */
volatile u32 thc_cursmask[32]; /* cursor mask bits */
volatile u32 thc_cursbits[32]; /* what to show where mask enabled */
};
struct bt_regs {
volatile u32 addr;
volatile u32 color_map;
volatile u32 control;
volatile u32 cursor;
};
#define TCX_MMAP_ENTRIES 14
struct tcx_par {
spinlock_t lock;
struct bt_regs __iomem *bt;
struct tcx_thc __iomem *thc;
struct tcx_tec __iomem *tec;
volatile u32 __iomem *cplane;
u32 flags;
#define TCX_FLAG_BLANKED 0x00000001
unsigned long physbase;
unsigned long fbsize;
struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES];
int lowdepth;
struct sbus_dev *sdev;
};
/* Reset control plane so that WID is 8-bit plane. */
static void __tcx_set_control_plane (struct tcx_par *par)
{
volatile u32 __iomem *p, *pend;
if (par->lowdepth)
return;
p = par->cplane;
if (p == NULL)
return;
for (pend = p + par->fbsize; p < pend; p++) {
u32 tmp = sbus_readl(p);
tmp &= 0xffffff;
sbus_writel(tmp, p);
}
}
static void tcx_reset (struct fb_info *info)
{
struct tcx_par *par = (struct tcx_par *) info->par;
unsigned long flags;
spin_lock_irqsave(&par->lock, flags);
__tcx_set_control_plane(par);
spin_unlock_irqrestore(&par->lock, flags);
}
static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
tcx_reset(info);
return 0;
}
/**
* tcx_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 tcx_setcolreg(unsigned regno,
unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
struct tcx_par *par = (struct tcx_par *) info->par;
struct bt_regs __iomem *bt = par->bt;
unsigned long flags;
if (regno >= 256)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
spin_lock_irqsave(&par->lock, flags);
sbus_writel(regno << 24, &bt->addr);
sbus_writel(red << 24, &bt->color_map);
sbus_writel(green << 24, &bt->color_map);
sbus_writel(blue << 24, &bt->color_map);
spin_unlock_irqrestore(&par->lock, flags);
return 0;
}
/**
* tcx_blank - Optional function. Blanks the display.
* @blank_mode: the blank mode we want.
* @info: frame buffer structure that represents a single frame buffer
*/
static int
tcx_blank(int blank, struct fb_info *info)
{
struct tcx_par *par = (struct tcx_par *) info->par;
struct tcx_thc __iomem *thc = par->thc;
unsigned long flags;
u32 val;
spin_lock_irqsave(&par->lock, flags);
val = sbus_readl(&thc->thc_misc);
switch (blank) {
case FB_BLANK_UNBLANK: /* Unblanking */
val &= ~(TCX_THC_MISC_VSYNC_DIS |
TCX_THC_MISC_HSYNC_DIS);
val |= TCX_THC_MISC_VIDEO;
par->flags &= ~TCX_FLAG_BLANKED;
break;
case FB_BLANK_NORMAL: /* Normal blanking */
val &= ~TCX_THC_MISC_VIDEO;
par->flags |= TCX_FLAG_BLANKED;
break;
case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
val |= TCX_THC_MISC_VSYNC_DIS;
break;
case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
val |= TCX_THC_MISC_HSYNC_DIS;
break;
case FB_BLANK_POWERDOWN: /* Poweroff */
break;
};
sbus_writel(val, &thc->thc_misc);
spin_unlock_irqrestore(&par->lock, flags);
return 0;
}
static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
{
.voff = TCX_RAM8BIT,
.size = SBUS_MMAP_FBSIZE(1)
},
{
.voff = TCX_RAM24BIT,
.size = SBUS_MMAP_FBSIZE(4)
},
{
.voff = TCX_UNK3,
.size = SBUS_MMAP_FBSIZE(8)
},
{
.voff = TCX_UNK4,
.size = SBUS_MMAP_FBSIZE(8)
},
{
.voff = TCX_CONTROLPLANE,
.size = SBUS_MMAP_FBSIZE(4)
},
{
.voff = TCX_UNK6,
.size = SBUS_MMAP_FBSIZE(8)
},
{
.voff = TCX_UNK7,
.size = SBUS_MMAP_FBSIZE(8)
},
{
.voff = TCX_TEC,
.size = PAGE_SIZE
},
{
.voff = TCX_BTREGS,
.size = PAGE_SIZE
},
{
.voff = TCX_THC,
.size = PAGE_SIZE
},
{
.voff = TCX_DHC,
.size = PAGE_SIZE
},
{
.voff = TCX_ALT,
.size = PAGE_SIZE
},
{
.voff = TCX_UNK2,
.size = 0x20000
},
{ .size = 0 }
};
static int tcx_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct tcx_par *par = (struct tcx_par *)info->par;
return sbusfb_mmap_helper(par->mmap_map,
par->physbase, par->fbsize,
par->sdev->reg_addrs[0].which_io,
vma);
}
static int tcx_ioctl(struct fb_info *info, unsigned int cmd,
unsigned long arg)
{
struct tcx_par *par = (struct tcx_par *) info->par;
return sbusfb_ioctl_helper(cmd, arg, info,
FBTYPE_TCXCOLOR,
(par->lowdepth ? 8 : 24),
par->fbsize);
}
/*
* Initialisation
*/
static void
tcx_init_fix(struct fb_info *info, int linebytes)
{
struct tcx_par *par = (struct tcx_par *)info->par;
const char *tcx_name;
if (par->lowdepth)
tcx_name = "TCX8";
else
tcx_name = "TCX24";
strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
info->fix.line_length = linebytes;
info->fix.accel = FB_ACCEL_SUN_TCX;
}
struct all_info {
struct fb_info info;
struct tcx_par par;
struct list_head list;
};
static LIST_HEAD(tcx_list);
static void tcx_init_one(struct sbus_dev *sdev)
{
struct all_info *all;
int linebytes, i;
all = kmalloc(sizeof(*all), GFP_KERNEL);
if (!all) {
printk(KERN_ERR "tcx: Cannot allocate memory.\n");
return;
}
memset(all, 0, sizeof(*all));
INIT_LIST_HEAD(&all->list);
spin_lock_init(&all->par.lock);
all->par.sdev = sdev;
all->par.lowdepth = prom_getbool(sdev->prom_node, "tcx-8-bit");
sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
all->info.var.red.length = 8;
all->info.var.green.length = 8;
all->info.var.blue.length = 8;
linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
all->info.var.xres);
all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
all->par.tec = sbus_ioremap(&sdev->resource[7], 0,
sizeof(struct tcx_tec), "tcx tec");
all->par.thc = sbus_ioremap(&sdev->resource[9], 0,
sizeof(struct tcx_thc), "tcx thc");
all->par.bt = sbus_ioremap(&sdev->resource[8], 0,
sizeof(struct bt_regs), "tcx dac");
memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map));
if (!all->par.lowdepth) {
all->par.cplane = sbus_ioremap(&sdev->resource[4], 0,
all->par.fbsize * sizeof(u32), "tcx cplane");
} else {
all->par.mmap_map[1].size = SBUS_MMAP_EMPTY;
all->par.mmap_map[4].size = SBUS_MMAP_EMPTY;
all->par.mmap_map[5].size = SBUS_MMAP_EMPTY;
all->par.mmap_map[6].size = SBUS_MMAP_EMPTY;
}
all->par.physbase = 0;
for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
int j;
switch (i) {
case 10:
j = 12;
break;
case 11: case 12:
j = i - 1;
break;
default:
j = i;
break;
};
all->par.mmap_map[i].poff = sdev->reg_addrs[j].phys_addr;
}
all->info.flags = FBINFO_DEFAULT;
all->info.fbops = &tcx_ops;
#ifdef CONFIG_SPARC32
all->info.screen_base = (char __iomem *)
prom_getintdefault(sdev->prom_node, "address", 0);
#endif
if (!all->info.screen_base)
all->info.screen_base = sbus_ioremap(&sdev->resource[0], 0,
all->par.fbsize, "tcx ram");
all->info.par = &all->par;
/* Initialize brooktree DAC. */
sbus_writel(0x04 << 24, &all->par.bt->addr); /* color planes */
sbus_writel(0xff << 24, &all->par.bt->control);
sbus_writel(0x05 << 24, &all->par.bt->addr);
sbus_writel(0x00 << 24, &all->par.bt->control);
sbus_writel(0x06 << 24, &all->par.bt->addr); /* overlay plane */
sbus_writel(0x73 << 24, &all->par.bt->control);
sbus_writel(0x07 << 24, &all->par.bt->addr);
sbus_writel(0x00 << 24, &all->par.bt->control);
tcx_reset(&all->info);
tcx_blank(FB_BLANK_UNBLANK, &all->info);
if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
printk(KERN_ERR "tcx: Could not allocate color map.\n");
kfree(all);
return;
}
fb_set_cmap(&all->info.cmap, &all->info);
tcx_init_fix(&all->info, linebytes);
if (register_framebuffer(&all->info) < 0) {
printk(KERN_ERR "tcx: Could not register framebuffer.\n");
fb_dealloc_cmap(&all->info.cmap);
kfree(all);
return;
}
list_add(&all->list, &tcx_list);
printk("tcx: %s at %lx:%lx, %s\n",
sdev->prom_name,
(long) sdev->reg_addrs[0].which_io,
(long) sdev->reg_addrs[0].phys_addr,
all->par.lowdepth ? "8-bit only" : "24-bit depth");
}
int __init tcx_init(void)
{
struct sbus_bus *sbus;
struct sbus_dev *sdev;
if (fb_get_options("tcxfb", NULL))
return -ENODEV;
for_all_sbusdev(sdev, sbus) {
if (!strcmp(sdev->prom_name, "SUNW,tcx"))
tcx_init_one(sdev);
}
return 0;
}
void __exit tcx_exit(void)
{
struct list_head *pos, *tmp;
list_for_each_safe(pos, tmp, &tcx_list) {
struct all_info *all = list_entry(pos, typeof(*all), list);
unregister_framebuffer(&all->info);
fb_dealloc_cmap(&all->info.cmap);
kfree(all);
}
}
int __init
tcx_setup(char *arg)
{
/* No cmdline options yet... */
return 0;
}
module_init(tcx_init);
#ifdef MODULE
module_exit(tcx_exit);
#endif
MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
MODULE_LICENSE("GPL");
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