linux/drivers/video/p9100.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

381 lines
9 KiB
C

/* p9100.c: P9100 frame buffer driver
*
* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
* 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/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 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 vm_area_struct *);
static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);
/*
* 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,
#ifdef CONFIG_COMPAT
.fb_compat_ioctl = sbusfb_compat_ioctl,
#endif
};
/* 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 */
u32 sys_base;
u32 sys_config;
u32 sys_intr;
u32 sys_int_ena;
u32 sys_alt_rd;
u32 sys_alt_wr;
u32 sys_xxx[58];
/* Registers for the video control */
u32 vid_base;
u32 vid_hcnt;
u32 vid_htotal;
u32 vid_hsync_rise;
u32 vid_hblank_rise;
u32 vid_hblank_fall;
u32 vid_hcnt_preload;
u32 vid_vcnt;
u32 vid_vlen;
u32 vid_vsync_rise;
u32 vid_vblank_rise;
u32 vid_vblank_fall;
u32 vid_vcnt_preload;
u32 vid_screenpaint_addr;
u32 vid_screenpaint_timectl1;
u32 vid_screenpaint_qsfcnt;
u32 vid_screenpaint_timectl2;
u32 vid_xxx[15];
/* Registers for the video control */
u32 vram_base;
u32 vram_memcfg;
u32 vram_refresh_pd;
u32 vram_refresh_cnt;
u32 vram_raslo_max;
u32 vram_raslo_cur;
u32 pwrup_cfg;
u32 vram_xxx[25];
/* Registers for IBM RGB528 Palette */
u32 ramdac_cmap_wridx;
u32 ramdac_palette_data;
u32 ramdac_pixel_mask;
u32 ramdac_palette_rdaddr;
u32 ramdac_idx_lo;
u32 ramdac_idx_hi;
u32 ramdac_idx_data;
u32 ramdac_idx_ctl;
u32 ramdac_xxx[1784];
};
struct p9100_cmd_parameng {
u32 parameng_status;
u32 parameng_bltcmd;
u32 parameng_quadcmd;
};
struct p9100_par {
spinlock_t lock;
struct p9100_regs __iomem *regs;
u32 flags;
#define P9100_FLAG_BLANKED 0x00000001
unsigned long which_io;
};
/**
* 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 vm_area_struct *vma)
{
struct p9100_par *par = (struct p9100_par *)info->par;
return sbusfb_mmap_helper(p9100_mmap_map,
info->fix.smem_start, info->fix.smem_len,
par->which_io, vma);
}
static int p9100_ioctl(struct fb_info *info, unsigned int cmd,
unsigned long arg)
{
/* Make it look like a cg3. */
return sbusfb_ioctl_helper(cmd, arg, info,
FBTYPE_SUN3COLOR, 8, info->fix.smem_len);
}
/*
* Initialisation
*/
static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp)
{
strlcpy(info->fix.id, dp->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;
}
static int __devinit p9100_probe(struct of_device *op, const struct of_device_id *match)
{
struct device_node *dp = op->node;
struct fb_info *info;
struct p9100_par *par;
int linebytes, err;
info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);
err = -ENOMEM;
if (!info)
goto out_err;
par = info->par;
spin_lock_init(&par->lock);
/* This is the framebuffer and the only resource apps can mmap. */
info->fix.smem_start = op->resource[2].start;
par->which_io = op->resource[2].flags & IORESOURCE_BITS;
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->regs = of_ioremap(&op->resource[0], 0,
sizeof(struct p9100_regs), "p9100 regs");
if (!par->regs)
goto out_release_fb;
info->flags = FBINFO_DEFAULT;
info->fbops = &p9100_ops;
info->screen_base = of_ioremap(&op->resource[2], 0,
info->fix.smem_len, "p9100 ram");
if (!info->screen_base)
goto out_unmap_regs;
p9100_blank(FB_BLANK_UNBLANK, info);
if (fb_alloc_cmap(&info->cmap, 256, 0))
goto out_unmap_screen;
p9100_init_fix(info, linebytes, dp);
err = register_framebuffer(info);
if (err < 0)
goto out_dealloc_cmap;
fb_set_cmap(&info->cmap, info);
dev_set_drvdata(&op->dev, info);
printk(KERN_INFO "%s: p9100 at %lx:%lx\n",
dp->full_name,
par->which_io, info->fix.smem_start);
return 0;
out_dealloc_cmap:
fb_dealloc_cmap(&info->cmap);
out_unmap_screen:
of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);
out_unmap_regs:
of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
out_release_fb:
framebuffer_release(info);
out_err:
return err;
}
static int __devexit p9100_remove(struct of_device *op)
{
struct fb_info *info = dev_get_drvdata(&op->dev);
struct p9100_par *par = info->par;
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);
framebuffer_release(info);
dev_set_drvdata(&op->dev, NULL);
return 0;
}
static const struct of_device_id p9100_match[] = {
{
.name = "p9100",
},
{},
};
MODULE_DEVICE_TABLE(of, p9100_match);
static struct of_platform_driver p9100_driver = {
.name = "p9100",
.match_table = p9100_match,
.probe = p9100_probe,
.remove = __devexit_p(p9100_remove),
};
static int __init p9100_init(void)
{
if (fb_get_options("p9100fb", NULL))
return -ENODEV;
return of_register_driver(&p9100_driver, &of_bus_type);
}
static void __exit p9100_exit(void)
{
of_unregister_driver(&p9100_driver);
}
module_init(p9100_init);
module_exit(p9100_exit);
MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");