fbmem.c

《linux驱动程序设计从入门到精通》一书中所有的程序代码含驱动和相应的应用程序

/*
 *  linux/drivers/video/fbmem.c
 *
 *  Copyright (C) 1994 Martin Schaller
 *
 *	2001 - Documented with DocBook
 *	- Brad Douglas <[e-mail]>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/config.h>
#include <linux/module.h>

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/tty.h>
#include <linux/init.h>
#include <linux/linux_logo.h>
#include <linux/proc_fs.h>
#include <linux/console.h>
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
#endif
#include <linux/devfs_fs_kernel.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/device.h>

#if defined(__mc68000__) || defined(CONFIG_APUS)
#include <asm/setup.h>
#endif

#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>

#include <linux/fb.h>

#ifdef CONFIG_FRAMEBUFFER_CONSOLE
#include "console/fbcon.h"
#endif
    /*
     *  Frame buffer device initialization and setup routines
     */

extern int acornfb_init(void);
extern int acornfb_setup(char*);
extern int amifb_init(void);
extern int amifb_setup(char*);
extern int atafb_init(void);
extern int atafb_setup(char*);
extern int macfb_init(void);
extern int macfb_setup(char*);
extern int cyberfb_init(void);
extern int cyberfb_setup(char*);
extern int pm2fb_init(void);
extern int pm2fb_setup(char*);
extern int pm3fb_init(void);
extern int pm3fb_setup(char*);
extern int clps711xfb_init(void);
extern int cyber2000fb_init(void);
extern int cyber2000fb_setup(char*);
extern int retz3fb_init(void);
extern int retz3fb_setup(char*);
extern int cirrusfb_init(void);
extern int cirrusfb_setup(char*);
extern int hitfb_init(void);
extern int vfb_init(void);
extern int vfb_setup(char*);
extern int offb_init(void);
extern int atyfb_init(void);
extern int atyfb_setup(char*);
extern int aty128fb_init(void);
extern int aty128fb_setup(char*);
extern int neofb_init(void);
extern int neofb_setup(char*);
extern int igafb_init(void);
extern int igafb_setup(char*);
extern int imsttfb_init(void);
extern int imsttfb_setup(char*);
extern int dnfb_init(void);
extern int tgafb_init(void);
extern int tgafb_setup(char*);
extern int virgefb_init(void);
extern int virgefb_setup(char*);
extern int resolver_video_setup(char*);
extern int s3triofb_init(void);
extern int vesafb_init(void);
extern int vesafb_setup(char*);
extern int vga16fb_init(void);
extern int vga16fb_setup(char*);
extern int hgafb_init(void);
extern int hgafb_setup(char*);
extern int matroxfb_init(void);
extern int matroxfb_setup(char*);
extern int hpfb_init(void);
extern int platinumfb_init(void);
extern int platinumfb_setup(char*);
extern int control_init(void);
extern int control_setup(char*);
extern int valkyriefb_init(void);
extern int valkyriefb_setup(char*);
extern int chips_init(void);
extern int g364fb_init(void);
extern int sa1100fb_init(void);
extern int pxafb_init(void);
extern int pxafb_setup(char*);
extern int fm2fb_init(void);
extern int fm2fb_setup(char*);
extern int q40fb_init(void);
extern int sun3fb_init(void);
extern int sun3fb_setup(char *);
extern int sgivwfb_init(void);
extern int sgivwfb_setup(char*);
extern int gbefb_init(void);
extern int gbefb_setup(char*);
extern int rivafb_init(void);
extern int rivafb_setup(char*);
extern int tdfxfb_init(void);
extern int tdfxfb_setup(char*);
extern int tridentfb_init(void);
extern int tridentfb_setup(char*);
extern int sisfb_init(void);
extern int sisfb_setup(char*);
extern int stifb_init(void);
extern int stifb_setup(char*);
extern int pmagbafb_init(void);
extern int pmagbbfb_init(void);
extern int maxinefb_init(void);
extern int tx3912fb_init(void);
extern int tx3912fb_setup(char*);
extern int radeonfb_init(void);
extern int radeonfb_setup(char*);
extern int radeonfb_old_init(void);
extern int radeonfb_old_setup(char*);
extern int e1355fb_init(void);
extern int e1355fb_setup(char*);
extern int pvr2fb_init(void);
extern int pvr2fb_setup(char*);
extern int sstfb_init(void);
extern int sstfb_setup(char*);
extern int i810fb_init(void);
extern int i810fb_setup(char*);
extern int ffb_init(void);
extern int ffb_setup(char*);
extern int cg6_init(void);
extern int cg6_setup(char*);
extern int cg3_init(void);
extern int cg3_setup(char*);
extern int bw2_init(void);
extern int bw2_setup(char*);
extern int cg14_init(void);
extern int cg14_setup(char*);
extern int p9100_init(void);
extern int p9100_setup(char*);
extern int tcx_init(void);
extern int tcx_setup(char*);
extern int leo_init(void);
extern int leo_setup(char*);
extern int kyrofb_init(void);
extern int kyrofb_setup(char*);
extern int mc68x328fb_init(void);
extern int mc68x328fb_setup(char *);
extern int asiliantfb_init(void);
extern int imxfb_init(void);
extern int imxfb_setup(char *);
extern int s3c2410fb_init(void);
extern int s3c2410fb_setup(char *);

static struct {
	const char *name;
	int (*init)(void);
	int (*setup)(char*);
} fb_drivers[] __initdata = {

	/*
	 * Chipset specific drivers that use resource management
	 */
#ifdef CONFIG_FB_RETINAZ3
	{ "retz3fb", retz3fb_init, retz3fb_setup },
#endif
#ifdef CONFIG_FB_AMIGA
	{ "amifb", amifb_init, amifb_setup },
#endif
#ifdef CONFIG_FB_CLPS711X
	{ "clps711xfb", clps711xfb_init, NULL },
#endif
#ifdef CONFIG_FB_CYBER
	{ "cyberfb", cyberfb_init, cyberfb_setup },
#endif
#ifdef CONFIG_FB_CYBER2000
	{ "cyber2000fb", cyber2000fb_init, cyber2000fb_setup },
#endif
#ifdef CONFIG_FB_PM2
	{ "pm2fb", pm2fb_init, pm2fb_setup },
#endif
#ifdef CONFIG_FB_PM3
	{ "pm3fb", pm3fb_init, pm3fb_setup },
#endif           
#ifdef CONFIG_FB_CIRRUS
	{ "cirrusfb", cirrusfb_init, cirrusfb_setup },
#endif
#ifdef CONFIG_FB_ATY
	{ "atyfb", atyfb_init, atyfb_setup },
#endif
#ifdef CONFIG_FB_MATROX
	{ "matroxfb", matroxfb_init, matroxfb_setup },
#endif
#ifdef CONFIG_FB_ATY128
	{ "aty128fb", aty128fb_init, aty128fb_setup },
#endif
#ifdef CONFIG_FB_NEOMAGIC
	{ "neofb", neofb_init, neofb_setup },
#endif
#ifdef CONFIG_FB_VIRGE
	{ "virgefb", virgefb_init, virgefb_setup },
#endif
#ifdef CONFIG_FB_RIVA
	{ "rivafb", rivafb_init, rivafb_setup },
#endif
#ifdef CONFIG_FB_3DFX
	{ "tdfxfb", tdfxfb_init, tdfxfb_setup },
#endif
#ifdef CONFIG_FB_RADEON
	{ "radeonfb", radeonfb_init, radeonfb_setup },
#endif
#ifdef CONFIG_FB_RADEON_OLD
	{ "radeonfb_old", radeonfb_old_init, radeonfb_old_setup },
#endif
#ifdef CONFIG_FB_CONTROL
	{ "controlfb", control_init, control_setup },
#endif
#ifdef CONFIG_FB_PLATINUM
	{ "platinumfb", platinumfb_init, platinumfb_setup },
#endif
#ifdef CONFIG_FB_VALKYRIE
	{ "valkyriefb", valkyriefb_init, valkyriefb_setup },
#endif
#ifdef CONFIG_FB_CT65550
	{ "chipsfb", chips_init, NULL },
#endif
#ifdef CONFIG_FB_IMSTT
	{ "imsttfb", imsttfb_init, imsttfb_setup },
#endif
#ifdef CONFIG_FB_S3TRIO
	{ "s3triofb", s3triofb_init, NULL },
#endif 
#ifdef CONFIG_FB_FM2
	{ "fm2fb", fm2fb_init, fm2fb_setup },
#endif 
#ifdef CONFIG_FB_SIS
	{ "sisfb", sisfb_init, sisfb_setup },
#endif
#ifdef CONFIG_FB_TRIDENT
	{ "tridentfb", tridentfb_init, tridentfb_setup },
#endif
#ifdef CONFIG_FB_I810
	{ "i810fb", i810fb_init, i810fb_setup },
#endif	
#ifdef CONFIG_FB_STI
	{ "stifb", stifb_init, stifb_setup },
#endif
#ifdef CONFIG_FB_FFB
	{ "ffb", ffb_init, ffb_setup },
#endif
#ifdef CONFIG_FB_CG6
	{ "cg6fb", cg6_init, cg6_setup },
#endif
#ifdef CONFIG_FB_CG3
	{ "cg3fb", cg3_init, cg3_setup },
#endif
#ifdef CONFIG_FB_BW2
	{ "bw2fb", bw2_init, bw2_setup },
#endif
#ifdef CONFIG_FB_CG14
	{ "cg14fb", cg14_init, cg14_setup },
#endif
#ifdef CONFIG_FB_P9100
	{ "p9100fb", p9100_init, p9100_setup },
#endif
#ifdef CONFIG_FB_TCX
	{ "tcxfb", tcx_init, tcx_setup },
#endif
#ifdef CONFIG_FB_LEO
	{ "leofb", leo_init, leo_setup },
#endif

	/*
	 * Generic drivers that are used as fallbacks
	 * 
	 * These depend on resource management and must be initialized
	 * _after_ all other frame buffer devices that use resource
	 * management!
	 */

#ifdef CONFIG_FB_OF
	{ "offb", offb_init, NULL },
#endif
#ifdef CONFIG_FB_VESA
	{ "vesafb", vesafb_init, vesafb_setup },
#endif 

	/*
	 * Chipset specific drivers that don't use resource management (yet)
	 */

#ifdef CONFIG_FB_SGIVW
	{ "sgivwfb", sgivwfb_init, sgivwfb_setup },
#endif
#ifdef CONFIG_FB_GBE
	{ "gbefb", gbefb_init, gbefb_setup },
#endif
#ifdef CONFIG_FB_ACORN
	{ "acornfb", acornfb_init, acornfb_setup },
#endif
#ifdef CONFIG_FB_ATARI
	{ "atafb", atafb_init, atafb_setup },
#endif
#ifdef CONFIG_FB_MAC
	{ "macfb", macfb_init, macfb_setup },
#endif
#ifdef CONFIG_FB_HGA
	{ "hgafb", hgafb_init, hgafb_setup },
#endif 
#ifdef CONFIG_FB_IGA
	{ "igafb", igafb_init, igafb_setup },
#endif
#ifdef CONFIG_APOLLO
	{ "apollofb", dnfb_init, NULL },
#endif
#ifdef CONFIG_FB_Q40
	{ "q40fb", q40fb_init, NULL },
#endif
#ifdef CONFIG_FB_TGA
	{ "tgafb", tgafb_init, tgafb_setup },
#endif
#ifdef CONFIG_FB_HP300
	{ "hpfb", hpfb_init, NULL },
#endif 
#ifdef CONFIG_FB_G364
	{ "g364fb", g364fb_init, NULL },
#endif
#ifdef CONFIG_FB_SA1100
	{ "sa1100fb", sa1100fb_init, NULL },
#endif
#ifdef CONFIG_FB_PXA
	{ "pxafb", pxafb_init, pxafb_setup },
#endif
#ifdef CONFIG_FB_SUN3
	{ "sun3fb", sun3fb_init, sun3fb_setup },
#endif
#ifdef CONFIG_FB_HIT
	{ "hitfb", hitfb_init, NULL },
#endif
#ifdef CONFIG_FB_TX3912
	{ "tx3912fb", tx3912fb_init, tx3912fb_setup },
#endif
#ifdef CONFIG_FB_E1355
	{ "e1355fb", e1355fb_init, e1355fb_setup },
#endif
#ifdef CONFIG_FB_PVR2
	{ "pvr2fb", pvr2fb_init, pvr2fb_setup },
#endif
#ifdef CONFIG_FB_PMAG_BA
	{ "pmagbafb", pmagbafb_init, NULL },
#endif          
#ifdef CONFIG_FB_PMAGB_B
	{ "pmagbbfb", pmagbbfb_init, NULL },
#endif
#ifdef CONFIG_FB_MAXINE
	{ "maxinefb", maxinefb_init, NULL },
#endif            
#ifdef CONFIG_FB_VOODOO1
	{ "sstfb", sstfb_init, sstfb_setup },
#endif
#ifdef CONFIG_FB_KYRO
	{ "kyrofb", kyrofb_init, kyrofb_setup },
#endif
#ifdef CONFIG_FB_68328
	{ "68328fb", mc68x328fb_init, mc68x328fb_setup },
#endif
#ifdef CONFIG_FB_ASILIANT
	{ "asiliantfb", asiliantfb_init, NULL },
#endif
#ifdef CONFIG_FB_IMX
	{ "imxfb", imxfb_init, imxfb_setup },
#endif
#ifdef CONFIG_FB_S3C2410
	{ "s3c2410fb", s3c2410fb_init, s3c2410fb_setup },
#endif

	/*
	 * Generic drivers that don't use resource management (yet)
	 */

#ifdef CONFIG_FB_VGA16
	{ "vga16fb", vga16fb_init, vga16fb_setup },
#endif 

#ifdef CONFIG_GSP_RESOLVER
	/* Not a real frame buffer device... */
	{ "resolverfb", NULL, resolver_video_setup },
#endif

#ifdef CONFIG_FB_VIRTUAL
	/*
	 * Vfb must be last to avoid that it becomes your primary display if
	 * other display devices are present
	 */
	{ "vfb", vfb_init, vfb_setup },
#endif
};

#define NUM_FB_DRIVERS	(sizeof(fb_drivers)/sizeof(*fb_drivers))
#define FBPIXMAPSIZE	16384

extern const char *global_mode_option;

static initcall_t pref_init_funcs[FB_MAX];
static int num_pref_init_funcs __initdata = 0;
static struct notifier_block *fb_notifier_list;
struct fb_info *registered_fb[FB_MAX];
int num_registered_fb;

#ifdef CONFIG_FB_OF
static int ofonly __initdata = 0;
#endif

/*
 * Drawing helpers.
 */
void fb_iomove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
			   u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
			   u32 height)
{
	int i;

	for (i = height; i--; ) {
		buf->outbuf(info, dst, src, s_pitch);
		src += s_pitch;
		dst += d_pitch;
	}
}

void fb_sysmove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
			    u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
			    u32 height)
{
	int i, j;

	for (i = height; i--; ) {
		for (j = 0; j < s_pitch; j++)
			dst[j] = src[j];
		src += s_pitch;
		dst += d_pitch;
	}
}

void fb_iomove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
			     u8 *dst, u32 d_pitch, u8 *src, u32 idx,
			     u32 height, u32 shift_high, u32 shift_low,
			     u32 mod)
{
	u8 mask = (u8) (0xfff << shift_high), tmp;
	int i, j;

	for (i = height; i--; ) {
		for (j = 0; j < idx; j++) {
			tmp = buf->inbuf(info, dst+j);
			tmp &= mask;
			tmp |= *src >> shift_low;
			buf->outbuf(info, dst+j, &tmp, 1);
			tmp = *src << shift_high;
			buf->outbuf(info, dst+j+1, &tmp, 1);
			src++;
		}
		tmp = buf->inbuf(info, dst+idx);
		tmp &= mask;
		tmp |= *src >> shift_low;
		buf->outbuf(info, dst+idx, &tmp, 1);
		if (shift_high < mod) {
			tmp = *src << shift_high;
			buf->outbuf(info, dst+idx+1, &tmp, 1);
		}	
		src++;
		dst += d_pitch;
	}
}

void fb_sysmove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
			      u8 *dst, u32 d_pitch, u8 *src, u32 idx,
			      u32 height, u32 shift_high, u32 shift_low,
			      u32 mod)
{
	u8 mask = (u8) (0xfff << shift_high), tmp;
	int i, j;

	for (i = height; i--; ) {
		for (j = 0; j < idx; j++) {
			tmp = dst[j];
			tmp &= mask;
			tmp |= *src >> shift_low;
			dst[j] = tmp;
			tmp = *src << shift_high;
			dst[j+1] = tmp;
			src++;
		}
		tmp = dst[idx];
		tmp &= mask;
		tmp |= *src >> shift_low;
		dst[idx] = tmp;
		if (shift_high < mod) {
			tmp = *src << shift_high;
			dst[idx+1] = tmp;
		}
		src++;
		dst += d_pitch;
	}
}

/*
 * we need to lock this section since fb_cursor
 * may use fb_imageblit()
 */
char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
{
	u32 align = buf->buf_align - 1, offset;
	char *addr = buf->addr;

	/* If IO mapped, we need to sync before access, no sharing of
	 * the pixmap is done
	 */
	if (buf->flags & FB_PIXMAP_IO) {
		if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
			info->fbops->fb_sync(info);