linux/drivers/video/tcx.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

540 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/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/of_device.h>
#include <asm/io.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 which_io;
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 fb_info *info)
{
struct tcx_par *par = info->par;
u32 __iomem *p, *pend;
if (par->lowdepth)
return;
p = par->cplane;
if (p == NULL)
return;
for (pend = p + info->fix.smem_len; 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(info);
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,
info->fix.smem_start, info->fix.smem_len,
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),
info->fix.smem_len);
}
/*
* 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;
}
static void tcx_unmap_regs(struct of_device *op, struct fb_info *info,
struct tcx_par *par)
{
if (par->tec)
of_iounmap(&op->resource[7],
par->tec, sizeof(struct tcx_tec));
if (par->thc)
of_iounmap(&op->resource[9],
par->thc, sizeof(struct tcx_thc));
if (par->bt)
of_iounmap(&op->resource[8],
par->bt, sizeof(struct bt_regs));
if (par->cplane)
of_iounmap(&op->resource[4],
par->cplane, info->fix.smem_len * sizeof(u32));
if (info->screen_base)
of_iounmap(&op->resource[0],
info->screen_base, info->fix.smem_len);
}
static int __devinit tcx_probe(struct of_device *op,
const struct of_device_id *match)
{
struct device_node *dp = op->node;
struct fb_info *info;
struct tcx_par *par;
int linebytes, i, err;
info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev);
err = -ENOMEM;
if (!info)
goto out_err;
par = info->par;
spin_lock_init(&par->lock);
par->lowdepth =
(of_find_property(dp, "tcx-8-bit", NULL) != NULL);
sbusfb_fill_var(&info->var, dp, 8);
info->var.red.length = 8;
info->var.green.length = 8;
info->var.blue.length = 8;
linebytes = of_getintprop_default(dp, "linebytes",
info->var.xres);
info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
par->tec = of_ioremap(&op->resource[7], 0,
sizeof(struct tcx_tec), "tcx tec");
par->thc = of_ioremap(&op->resource[9], 0,
sizeof(struct tcx_thc), "tcx thc");
par->bt = of_ioremap(&op->resource[8], 0,
sizeof(struct bt_regs), "tcx dac");
info->screen_base = of_ioremap(&op->resource[0], 0,
info->fix.smem_len, "tcx ram");
if (!par->tec || !par->thc ||
!par->bt || !info->screen_base)
goto out_unmap_regs;
memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
if (!par->lowdepth) {
par->cplane = of_ioremap(&op->resource[4], 0,
info->fix.smem_len * sizeof(u32),
"tcx cplane");
if (!par->cplane)
goto out_unmap_regs;
} else {
par->mmap_map[1].size = SBUS_MMAP_EMPTY;
par->mmap_map[4].size = SBUS_MMAP_EMPTY;
par->mmap_map[5].size = SBUS_MMAP_EMPTY;
par->mmap_map[6].size = SBUS_MMAP_EMPTY;
}
info->fix.smem_start = op->resource[0].start;
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;
};
par->mmap_map[i].poff = op->resource[j].start;
}
info->flags = FBINFO_DEFAULT;
info->fbops = &tcx_ops;
/* Initialize brooktree DAC. */
sbus_writel(0x04 << 24, &par->bt->addr); /* color planes */
sbus_writel(0xff << 24, &par->bt->control);
sbus_writel(0x05 << 24, &par->bt->addr);
sbus_writel(0x00 << 24, &par->bt->control);
sbus_writel(0x06 << 24, &par->bt->addr); /* overlay plane */
sbus_writel(0x73 << 24, &par->bt->control);
sbus_writel(0x07 << 24, &par->bt->addr);
sbus_writel(0x00 << 24, &par->bt->control);
tcx_reset(info);
tcx_blank(FB_BLANK_UNBLANK, info);
if (fb_alloc_cmap(&info->cmap, 256, 0))
goto out_unmap_regs;
fb_set_cmap(&info->cmap, info);
tcx_init_fix(info, linebytes);
err = register_framebuffer(info);
if (err < 0)
goto out_dealloc_cmap;
dev_set_drvdata(&op->dev, info);
printk(KERN_INFO "%s: TCX at %lx:%lx, %s\n",
dp->full_name,
par->which_io,
info->fix.smem_start,
par->lowdepth ? "8-bit only" : "24-bit depth");
return 0;
out_dealloc_cmap:
fb_dealloc_cmap(&info->cmap);
out_unmap_regs:
tcx_unmap_regs(op, info, par);
out_err:
return err;
}
static int __devexit tcx_remove(struct of_device *op)
{
struct fb_info *info = dev_get_drvdata(&op->dev);
struct tcx_par *par = info->par;
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
tcx_unmap_regs(op, info, par);
framebuffer_release(info);
dev_set_drvdata(&op->dev, NULL);
return 0;
}
static const 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),
};
static int __init tcx_init(void)
{
if (fb_get_options("tcxfb", NULL))
return -ENODEV;
return of_register_driver(&tcx_driver, &of_bus_type);
}
static 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");