android_kernel_xiaomi_sm8350/drivers/video/tcx.c
David S. Miller e3a411a3df [SPARC64]: Fix of_iounmap() region release.
We need to pass in the resource otherwise we cannot
release the region properly.  We must know whether it is
an I/O or MEM resource.

Spotted by Eric Brower.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-31 14:06:05 -08:00

554 lines
12 KiB
C

/* tcx.c: TCX 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/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/of_device.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 {
u32 tec_matrix;
u32 tec_clip;
u32 tec_vdc;
};
struct tcx_thc {
u32 thc_rev;
u32 thc_pad0[511];
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 bt_regs {
u32 addr;
u32 color_map;
u32 control;
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;
u32 __iomem *cplane;
u32 flags;
#define TCX_FLAG_BLANKED 0x00000001
unsigned long physbase;
unsigned long which_io;
unsigned long fbsize;
struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES];
int lowdepth;
};
/* Reset control plane so that WID is 8-bit plane. */
static void __tcx_set_control_plane (struct tcx_par *par)
{
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->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;
};
static void tcx_unmap_regs(struct of_device *op, struct all_info *all)
{
if (all->par.tec)
of_iounmap(&op->resource[7],
all->par.tec, sizeof(struct tcx_tec));
if (all->par.thc)
of_iounmap(&op->resource[9],
all->par.thc, sizeof(struct tcx_thc));
if (all->par.bt)
of_iounmap(&op->resource[8],
all->par.bt, sizeof(struct bt_regs));
if (all->par.cplane)
of_iounmap(&op->resource[4],
all->par.cplane, all->par.fbsize * sizeof(u32));
if (all->info.screen_base)
of_iounmap(&op->resource[0],
all->info.screen_base, all->par.fbsize);
}
static int __devinit tcx_init_one(struct of_device *op)
{
struct device_node *dp = op->node;
struct all_info *all;
int linebytes, i, err;
all = kzalloc(sizeof(*all), GFP_KERNEL);
if (!all)
return -ENOMEM;
spin_lock_init(&all->par.lock);
all->par.lowdepth =
(of_find_property(dp, "tcx-8-bit", NULL) != NULL);
sbusfb_fill_var(&all->info.var, dp->node, 8);
all->info.var.red.length = 8;
all->info.var.green.length = 8;
all->info.var.blue.length = 8;
linebytes = of_getintprop_default(dp, "linebytes",
all->info.var.xres);
all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
all->par.tec = of_ioremap(&op->resource[7], 0,
sizeof(struct tcx_tec), "tcx tec");
all->par.thc = of_ioremap(&op->resource[9], 0,
sizeof(struct tcx_thc), "tcx thc");
all->par.bt = of_ioremap(&op->resource[8], 0,
sizeof(struct bt_regs), "tcx dac");
all->info.screen_base = of_ioremap(&op->resource[0], 0,
all->par.fbsize, "tcx ram");
if (!all->par.tec || !all->par.thc ||
!all->par.bt || !all->info.screen_base) {
tcx_unmap_regs(op, all);
kfree(all);
return -ENOMEM;
}
memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map));
if (!all->par.lowdepth) {
all->par.cplane = of_ioremap(&op->resource[4], 0,
all->par.fbsize * sizeof(u32),
"tcx cplane");
if (!all->par.cplane) {
tcx_unmap_regs(op, all);
kfree(all);
return -ENOMEM;
}
} 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;
all->par.which_io = op->resource[0].flags & IORESOURCE_BITS;
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 = op->resource[j].start;
}
all->info.flags = FBINFO_DEFAULT;
all->info.fbops = &tcx_ops;
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)) {
tcx_unmap_regs(op, all);
kfree(all);
return -ENOMEM;
}
fb_set_cmap(&all->info.cmap, &all->info);
tcx_init_fix(&all->info, linebytes);
err = register_framebuffer(&all->info);
if (err < 0) {
fb_dealloc_cmap(&all->info.cmap);
tcx_unmap_regs(op, all);
kfree(all);
return err;
}
dev_set_drvdata(&op->dev, all);
printk("%s: TCX at %lx:%lx, %s\n",
dp->full_name,
all->par.which_io,
op->resource[0].start,
all->par.lowdepth ? "8-bit only" : "24-bit depth");
return 0;
}
static int __devinit tcx_probe(struct of_device *dev, const struct of_device_id *match)
{
struct of_device *op = to_of_device(&dev->dev);
return tcx_init_one(op);
}
static int __devexit tcx_remove(struct of_device *op)
{
struct all_info *all = dev_get_drvdata(&op->dev);
unregister_framebuffer(&all->info);
fb_dealloc_cmap(&all->info.cmap);
tcx_unmap_regs(op, all);
kfree(all);
dev_set_drvdata(&op->dev, NULL);
return 0;
}
static struct of_device_id tcx_match[] = {
{
.name = "SUNW,tcx",
},
{},
};
MODULE_DEVICE_TABLE(of, tcx_match);
static struct of_platform_driver tcx_driver = {
.name = "tcx",
.match_table = tcx_match,
.probe = tcx_probe,
.remove = __devexit_p(tcx_remove),
};
int __init tcx_init(void)
{
if (fb_get_options("tcxfb", NULL))
return -ENODEV;
return of_register_driver(&tcx_driver, &of_bus_type);
}
void __exit tcx_exit(void)
{
of_unregister_driver(&tcx_driver);
}
module_init(tcx_init);
module_exit(tcx_exit);
MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");