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linux/drivers/video/p9100.c
Tom 'spot' Callaway d85c3553df [SPARC]: Fix p9100 framebuffer in 2.6 
The attached patch fixes the p9100 framebuffer so that text is viewable
(not black on black, like it was before the patch). The linux logo
displays for a very short period of time, then is replaced by a grey
box. This leads me to believe that this framebuffer would have problems
in X, but since there hasn't been a weitek driver for X in several
millennia, this isn't something that I can confirm or deny.

But this patch does get color console working on my SPARCbook 3TX.

Signed-off-by: Tom 'spot' Callaway <tcallawa@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-10-07 13:05:56 -07:00

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/* p9100.c: P9100 frame buffer driver
*
* Copyright (C) 2003 David S. Miller (davem@redhat.com)
* Copyright 1999 Derrick J Brashear (shadow@dementia.org)
*
* 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 p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
unsigned, struct fb_info *);
static int p9100_blank(int, struct fb_info *);
static int p9100_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
static int p9100_ioctl(struct inode *, struct file *, unsigned int,
unsigned long, struct fb_info *);
/*
* Frame buffer operations
*/
static struct fb_ops p9100_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = p9100_setcolreg,
.fb_blank = p9100_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_mmap = p9100_mmap,
.fb_ioctl = p9100_ioctl,
.fb_cursor = soft_cursor,
};
/* P9100 control registers */
#define P9100_SYSCTL_OFF 0x0UL
#define P9100_VIDEOCTL_OFF 0x100UL
#define P9100_VRAMCTL_OFF 0x180UL
#define P9100_RAMDAC_OFF 0x200UL
#define P9100_VIDEOCOPROC_OFF 0x400UL
/* P9100 command registers */
#define P9100_CMD_OFF 0x0UL
/* P9100 framebuffer memory */
#define P9100_FB_OFF 0x0UL
/* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
#define SYS_CONFIG_PIXELSIZE_SHIFT 26
#define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */
struct p9100_regs {
/* Registers for the system control */
volatile u32 sys_base;
volatile u32 sys_config;
volatile u32 sys_intr;
volatile u32 sys_int_ena;
volatile u32 sys_alt_rd;
volatile u32 sys_alt_wr;
volatile u32 sys_xxx[58];
/* Registers for the video control */
volatile u32 vid_base;
volatile u32 vid_hcnt;
volatile u32 vid_htotal;
volatile u32 vid_hsync_rise;
volatile u32 vid_hblank_rise;
volatile u32 vid_hblank_fall;
volatile u32 vid_hcnt_preload;
volatile u32 vid_vcnt;
volatile u32 vid_vlen;
volatile u32 vid_vsync_rise;
volatile u32 vid_vblank_rise;
volatile u32 vid_vblank_fall;
volatile u32 vid_vcnt_preload;
volatile u32 vid_screenpaint_addr;
volatile u32 vid_screenpaint_timectl1;
volatile u32 vid_screenpaint_qsfcnt;
volatile u32 vid_screenpaint_timectl2;
volatile u32 vid_xxx[15];
/* Registers for the video control */
volatile u32 vram_base;
volatile u32 vram_memcfg;
volatile u32 vram_refresh_pd;
volatile u32 vram_refresh_cnt;
volatile u32 vram_raslo_max;
volatile u32 vram_raslo_cur;
volatile u32 pwrup_cfg;
volatile u32 vram_xxx[25];
/* Registers for IBM RGB528 Palette */
volatile u32 ramdac_cmap_wridx;
volatile u32 ramdac_palette_data;
volatile u32 ramdac_pixel_mask;
volatile u32 ramdac_palette_rdaddr;
volatile u32 ramdac_idx_lo;
volatile u32 ramdac_idx_hi;
volatile u32 ramdac_idx_data;
volatile u32 ramdac_idx_ctl;
volatile u32 ramdac_xxx[1784];
};
struct p9100_cmd_parameng {
volatile u32 parameng_status;
volatile u32 parameng_bltcmd;
volatile u32 parameng_quadcmd;
};
struct p9100_par {
spinlock_t lock;
struct p9100_regs __iomem *regs;
u32 flags;
#define P9100_FLAG_BLANKED 0x00000001
unsigned long physbase;
unsigned long fbsize;
struct sbus_dev *sdev;
struct list_head list;
};
/**
* p9100_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 p9100_setcolreg(unsigned regno,
unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
struct p9100_par *par = (struct p9100_par *) info->par;
struct p9100_regs __iomem *regs = par->regs;
unsigned long flags;
if (regno >= 256)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
spin_lock_irqsave(&par->lock, flags);
sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
sbus_writel((red << 16), &regs->ramdac_palette_data);
sbus_writel((green << 16), &regs->ramdac_palette_data);
sbus_writel((blue << 16), &regs->ramdac_palette_data);
spin_unlock_irqrestore(&par->lock, flags);
return 0;
}
/**
* p9100_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
p9100_blank(int blank, struct fb_info *info)
{
struct p9100_par *par = (struct p9100_par *) info->par;
struct p9100_regs __iomem *regs = par->regs;
unsigned long flags;
u32 val;
spin_lock_irqsave(&par->lock, flags);
switch (blank) {
case FB_BLANK_UNBLANK: /* Unblanking */
val = sbus_readl(&regs->vid_screenpaint_timectl1);
val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
sbus_writel(val, &regs->vid_screenpaint_timectl1);
par->flags &= ~P9100_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(&regs->vid_screenpaint_timectl1);
val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
sbus_writel(val, &regs->vid_screenpaint_timectl1);
par->flags |= P9100_FLAG_BLANKED;
break;
}
spin_unlock_irqrestore(&par->lock, flags);
return 0;
}
static struct sbus_mmap_map p9100_mmap_map[] = {
{ CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) },
{ 0, 0, 0 }
};
static int p9100_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
{
struct p9100_par *par = (struct p9100_par *)info->par;
return sbusfb_mmap_helper(p9100_mmap_map,
par->physbase, par->fbsize,
par->sdev->reg_addrs[0].which_io,
vma);
}
static int p9100_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg, struct fb_info *info)
{
struct p9100_par *par = (struct p9100_par *) info->par;
/* Make it look like a cg3. */
return sbusfb_ioctl_helper(cmd, arg, info,
FBTYPE_SUN3COLOR, 8, par->fbsize);
}
/*
* Initialisation
*/
static void
p9100_init_fix(struct fb_info *info, int linebytes)
{
struct p9100_par *par = (struct p9100_par *)info->par;
strlcpy(info->fix.id, par->sdev->prom_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_CGTHREE;
}
struct all_info {
struct fb_info info;
struct p9100_par par;
struct list_head list;
};
static LIST_HEAD(p9100_list);
static void p9100_init_one(struct sbus_dev *sdev)
{
struct all_info *all;
int linebytes;
all = kmalloc(sizeof(*all), GFP_KERNEL);
if (!all) {
printk(KERN_ERR "p9100: 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;
/* This is the framebuffer and the only resource apps can mmap. */
all->par.physbase = sdev->reg_addrs[2].phys_addr;
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.regs = sbus_ioremap(&sdev->resource[0], 0,
sizeof(struct p9100_regs), "p9100 regs");
all->info.flags = FBINFO_DEFAULT;
all->info.fbops = &p9100_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[2], 0,
all->par.fbsize, "p9100 ram");
all->info.par = &all->par;
p9100_blank(0, &all->info);
if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
printk(KERN_ERR "p9100: Could not allocate color map.\n");
kfree(all);
return;
}
p9100_init_fix(&all->info, linebytes);
if (register_framebuffer(&all->info) < 0) {
printk(KERN_ERR "p9100: Could not register framebuffer.\n");
fb_dealloc_cmap(&all->info.cmap);
kfree(all);
return;
}
fb_set_cmap(&all->info.cmap, &all->info);
list_add(&all->list, &p9100_list);
printk("p9100: %s at %lx:%lx\n",
sdev->prom_name,
(long) sdev->reg_addrs[0].which_io,
(long) sdev->reg_addrs[0].phys_addr);
}
int __init p9100_init(void)
{
struct sbus_bus *sbus;
struct sbus_dev *sdev;
if (fb_get_options("p9100fb", NULL))
return -ENODEV;
for_all_sbusdev(sdev, sbus) {
if (!strcmp(sdev->prom_name, "p9100"))
p9100_init_one(sdev);
}
return 0;
}
void __exit p9100_exit(void)
{
struct list_head *pos, *tmp;
list_for_each_safe(pos, tmp, &p9100_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
p9100_setup(char *arg)
{
/* No cmdline options yet... */
return 0;
}
module_init(p9100_init);
#ifdef MODULE
module_exit(p9100_exit);
#endif
MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
MODULE_LICENSE("GPL");
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