WebSVN - shark - Blame - Rev 483 - /shark/trunk/drivers/fb/fbmem.c

Rev	Author	Line No.	Line
466	giacomo	1	/*
		2	* linux/drivers/video/fbmem.c
		3	*
		4	* Copyright (C) 1994 Martin Schaller
		5	*
		6	* 2001 - Documented with DocBook
		7	* - Brad Douglas <brad@neruo.com>
		8	*
		9	* This file is subject to the terms and conditions of the GNU General Public
		10	* License. See the file COPYING in the main directory of this archive
		11	* for more details.
		12	*/
		13
		14	#include <linuxcomp.h>
		15
		16	#include <linux/config.h>
		17	#include <linux/module.h>
		18
		19	#include <linux/types.h>
		20	#include <linux/errno.h>
		21	#include <linux/sched.h>
		22	#include <linux/smp_lock.h>
		23	#include <linux/kernel.h>
		24	#include <linux/major.h>
		25	#include <linux/slab.h>
		26	#include <linux/mm.h>
		27	#include <linux/mman.h>
		28	#include <linux/tty.h>
		29	#include <linux/init.h>
		30	#include <linux/linux_logo.h>
		31	#include <linux/proc_fs.h>
		32	#ifdef CONFIG_KMOD
		33	#include <linux/kmod.h>
		34	#endif
		35	#include <linux/devfs_fs_kernel.h>
		36
		37	#if defined(__mc68000__) \|\| defined(CONFIG_APUS)
		38	#include <asm/setup.h>
		39	#endif
		40
		41	#include <asm/io.h>
		42	#include <asm/uaccess.h>
		43	#include <asm/page.h>
		44	#include <asm/pgtable.h>
		45
		46	#include <linux/fb.h>
		47
		48	#ifdef CONFIG_FRAMEBUFFER_CONSOLE
		49	#include "console/fbcon.h"
		50	#endif
		51	/*
		52	* Frame buffer device initialization and setup routines
		53	*/
		54
		55	extern int acornfb_init(void);
		56	extern int acornfb_setup(char*);
		57	extern int amifb_init(void);
		58	extern int amifb_setup(char*);
		59	extern int anakinfb_init(void);
		60	extern int atafb_init(void);
		61	extern int atafb_setup(char*);
		62	extern int macfb_init(void);
		63	extern int macfb_setup(char*);
		64	extern int cyberfb_init(void);
		65	extern int cyberfb_setup(char*);
		66	extern int pm2fb_init(void);
		67	extern int pm2fb_setup(char*);
		68	extern int pm3fb_init(void);
		69	extern int pm3fb_setup(char*);
		70	extern int clps711xfb_init(void);
		71	extern int cyber2000fb_init(void);
		72	extern int cyber2000fb_setup(char*);
		73	extern int retz3fb_init(void);
		74	extern int retz3fb_setup(char*);
		75	extern int clgenfb_init(void);
		76	extern int clgenfb_setup(char*);
		77	extern int hitfb_init(void);
		78	extern int vfb_init(void);
		79	extern int vfb_setup(char*);
		80	extern int offb_init(void);
		81	extern int atyfb_init(void);
		82	extern int atyfb_setup(char*);
		83	extern int aty128fb_init(void);
		84	extern int aty128fb_setup(char*);
		85	extern int neofb_init(void);
		86	extern int neofb_setup(char*);
		87	extern int igafb_init(void);
		88	extern int igafb_setup(char*);
		89	extern int imsttfb_init(void);
		90	extern int imsttfb_setup(char*);
		91	extern int dnfb_init(void);
		92	extern int tgafb_init(void);
		93	extern int tgafb_setup(char*);
		94	extern int virgefb_init(void);
		95	extern int virgefb_setup(char*);
		96	extern int resolver_video_setup(char*);
		97	extern int s3triofb_init(void);
		98	extern int vesafb_init(void);
		99	extern int vesafb_setup(char*);
		100	extern int vga16fb_init(void);
		101	extern int vga16fb_setup(char*);
		102	extern int hgafb_init(void);
		103	extern int hgafb_setup(char*);
		104	extern int matroxfb_init(void);
		105	extern int matroxfb_setup(char*);
		106	extern int hpfb_init(void);
		107	extern int control_init(void);
		108	extern int control_setup(char*);
		109	extern int platinum_init(void);
		110	extern int platinum_setup(char*);
		111	extern int valkyriefb_init(void);
		112	extern int valkyriefb_setup(char*);
		113	extern int chips_init(void);
		114	extern int g364fb_init(void);
		115	extern int sa1100fb_init(void);
		116	extern int fm2fb_init(void);
		117	extern int fm2fb_setup(char*);
		118	extern int q40fb_init(void);
		119	extern int sun3fb_init(void);
		120	extern int sun3fb_setup(char *);
		121	extern int sgivwfb_init(void);
		122	extern int sgivwfb_setup(char*);
		123	extern int rivafb_init(void);
		124	extern int rivafb_setup(char*);
		125	extern int tdfxfb_init(void);
		126	extern int tdfxfb_setup(char*);
		127	extern int tridentfb_init(void);
		128	extern int tridentfb_setup(char*);
		129	extern int sisfb_init(void);
		130	extern int sisfb_setup(char*);
		131	extern int stifb_init(void);
		132	extern int stifb_setup(char*);
		133	extern int pmagbafb_init(void);
		134	extern int pmagbbfb_init(void);
		135	extern int maxinefb_init(void);
		136	extern int tx3912fb_init(void);
		137	extern int tx3912fb_setup(char*);
		138	extern int radeonfb_init(void);
		139	extern int radeonfb_setup(char*);
		140	extern int e1355fb_init(void);
		141	extern int e1355fb_setup(char*);
		142	extern int pvr2fb_init(void);
		143	extern int pvr2fb_setup(char*);
		144	extern int sstfb_init(void);
		145	extern int sstfb_setup(char*);
		146	extern int i810fb_init(void);
		147	extern int i810fb_setup(char*);
		148	extern int ffb_init(void);
		149	extern int ffb_setup(char*);
		150	extern int cg6_init(void);
		151	extern int cg6_setup(char*);
		152	extern int cg3_init(void);
		153	extern int cg3_setup(char*);
		154	extern int bw2_init(void);
		155	extern int bw2_setup(char*);
		156	extern int cg14_init(void);
		157	extern int cg14_setup(char*);
		158	extern int p9100_init(void);
		159	extern int p9100_setup(char*);
		160	extern int tcx_init(void);
		161	extern int tcx_setup(char*);
		162	extern int leo_init(void);
		163	extern int leo_setup(char*);
		164
		165	static struct {
		166	const char *name;
		167	int (*init)(void);
		168	int (setup)(char);
		169	} fb_drivers[] __initdata = {
		170
		171	/*
		172	* Chipset specific drivers that use resource management
		173	*/
		174	#ifdef CONFIG_FB_RETINAZ3
		175	{ "retz3fb", retz3fb_init, retz3fb_setup },
		176	#endif
		177	#ifdef CONFIG_FB_AMIGA
		178	{ "amifb", amifb_init, amifb_setup },
		179	#endif
		180	#ifdef CONFIG_FB_ANAKIN
		181	{ "anakinfb", anakinfb_init, NULL },
		182	#endif
		183	#ifdef CONFIG_FB_CLPS711X
		184	{ "clps711xfb", clps711xfb_init, NULL },
		185	#endif
		186	#ifdef CONFIG_FB_CYBER
		187	{ "cyberfb", cyberfb_init, cyberfb_setup },
		188	#endif
		189	#ifdef CONFIG_FB_CYBER2000
		190	{ "cyber2000fb", cyber2000fb_init, cyber2000fb_setup },
		191	#endif
		192	#ifdef CONFIG_FB_PM2
		193	{ "pm2fb", pm2fb_init, pm2fb_setup },
		194	#endif
		195	#ifdef CONFIG_FB_PM3
		196	{ "pm3fb", pm3fb_init, pm3fb_setup },
		197	#endif
		198	#ifdef CONFIG_FB_CLGEN
		199	{ "clgenfb", clgenfb_init, clgenfb_setup },
		200	#endif
		201	#ifdef CONFIG_FB_ATY
		202	{ "atyfb", atyfb_init, atyfb_setup },
		203	#endif
		204	#ifdef CONFIG_FB_MATROX
		205	{ "matroxfb", matroxfb_init, matroxfb_setup },
		206	#endif
		207	#ifdef CONFIG_FB_ATY128
		208	{ "aty128fb", aty128fb_init, aty128fb_setup },
		209	#endif
		210	#ifdef CONFIG_FB_NEOMAGIC
		211	{ "neofb", neofb_init, neofb_setup },
		212	#endif
		213	#ifdef CONFIG_FB_VIRGE
		214	{ "virgefb", virgefb_init, virgefb_setup },
		215	#endif
		216	#ifdef CONFIG_FB_RIVA
		217	{ "rivafb", rivafb_init, rivafb_setup },
		218	#endif
		219	#ifdef CONFIG_FB_3DFX
		220	{ "tdfxfb", tdfxfb_init, tdfxfb_setup },
		221	#endif
		222	#ifdef CONFIG_FB_RADEON
		223	{ "radeonfb", radeonfb_init, radeonfb_setup },
		224	#endif
		225	#ifdef CONFIG_FB_CONTROL
		226	{ "controlfb", control_init, control_setup },
		227	#endif
		228	#ifdef CONFIG_FB_PLATINUM
		229	{ "platinumfb", platinum_init, platinum_setup },
		230	#endif
		231	#ifdef CONFIG_FB_VALKYRIE
		232	{ "valkyriefb", valkyriefb_init, valkyriefb_setup },
		233	#endif
		234	#ifdef CONFIG_FB_CT65550
		235	{ "chipsfb", chips_init, NULL },
		236	#endif
		237	#ifdef CONFIG_FB_IMSTT
		238	{ "imsttfb", imsttfb_init, imsttfb_setup },
		239	#endif
		240	#ifdef CONFIG_FB_S3TRIO
		241	{ "s3triofb", s3triofb_init, NULL },
		242	#endif
		243	#ifdef CONFIG_FB_FM2
		244	{ "fm2fb", fm2fb_init, fm2fb_setup },
		245	#endif
		246	#ifdef CONFIG_FB_SIS
		247	{ "sisfb", sisfb_init, sisfb_setup },
		248	#endif
		249	#ifdef CONFIG_FB_TRIDENT
		250	{ "tridentfb", tridentfb_init, tridentfb_setup },
		251	#endif
		252	#ifdef CONFIG_FB_I810
		253	{ "i810fb", i810fb_init, i810fb_setup },
		254	#endif
		255	#ifdef CONFIG_FB_STI
		256	{ "stifb", stifb_init, stifb_setup },
		257	#endif
		258	#ifdef CONFIG_FB_FFB
		259	{ "ffb", ffb_init, ffb_setup },
		260	#endif
		261	#ifdef CONFIG_FB_CG6
		262	{ "cg6fb", cg6_init, cg6_setup },
		263	#endif
		264	#ifdef CONFIG_FB_CG3
		265	{ "cg3fb", cg3_init, cg3_setup },
		266	#endif
		267	#ifdef CONFIG_FB_BW2
		268	{ "bw2fb", bw2_init, bw2_setup },
		269	#endif
		270	#ifdef CONFIG_FB_CG14
		271	{ "cg14fb", cg14_init, cg14_setup },
		272	#endif
		273	#ifdef CONFIG_FB_P9100
		274	{ "p9100fb", p9100_init, p9100_setup },
		275	#endif
		276	#ifdef CONFIG_FB_TCX
		277	{ "tcxfb", tcx_init, tcx_setup },
		278	#endif
		279	#ifdef CONFIG_FB_LEO
		280	{ "leofb", leo_init, leo_setup },
		281	#endif
		282
		283	/*
		284	* Generic drivers that are used as fallbacks
		285	*
		286	* These depend on resource management and must be initialized
		287	* _after_ all other frame buffer devices that use resource
		288	* management!
		289	*/
		290
		291	#ifdef CONFIG_FB_OF
		292	{ "offb", offb_init, NULL },
		293	#endif
		294	#ifdef CONFIG_FB_VESA
		295	{ "vesafb", vesafb_init, vesafb_setup },
		296	#endif
		297
		298	/*
		299	* Chipset specific drivers that don't use resource management (yet)
		300	*/
		301
		302	#ifdef CONFIG_FB_SGIVW
		303	{ "sgivwfb", sgivwfb_init, sgivwfb_setup },
		304	#endif
		305	#ifdef CONFIG_FB_ACORN
		306	{ "acornfb", acornfb_init, acornfb_setup },
		307	#endif
		308	#ifdef CONFIG_FB_ATARI
		309	{ "atafb", atafb_init, atafb_setup },
		310	#endif
		311	#ifdef CONFIG_FB_MAC
		312	{ "macfb", macfb_init, macfb_setup },
		313	#endif
		314	#ifdef CONFIG_FB_HGA
		315	{ "hgafb", hgafb_init, hgafb_setup },
		316	#endif
		317	#ifdef CONFIG_FB_IGA
		318	{ "igafb", igafb_init, igafb_setup },
		319	#endif
		320	#ifdef CONFIG_APOLLO
		321	{ "apollofb", dnfb_init, NULL },
		322	#endif
		323	#ifdef CONFIG_FB_Q40
		324	{ "q40fb", q40fb_init, NULL },
		325	#endif
		326	#ifdef CONFIG_FB_TGA
		327	{ "tgafb", tgafb_init, tgafb_setup },
		328	#endif
		329	#ifdef CONFIG_FB_HP300
		330	{ "hpfb", hpfb_init, NULL },
		331	#endif
		332	#ifdef CONFIG_FB_G364
		333	{ "g364fb", g364fb_init, NULL },
		334	#endif
		335	#ifdef CONFIG_FB_SA1100
		336	{ "sa1100fb", sa1100fb_init, NULL },
		337	#endif
		338	#ifdef CONFIG_FB_SUN3
		339	{ "sun3fb", sun3fb_init, sun3fb_setup },
		340	#endif
		341	#ifdef CONFIG_FB_HIT
		342	{ "hitfb", hitfb_init, NULL },
		343	#endif
		344	#ifdef CONFIG_FB_TX3912
		345	{ "tx3912fb", tx3912fb_init, tx3912fb_setup },
		346	#endif
		347	#ifdef CONFIG_FB_E1355
		348	{ "e1355fb", e1355fb_init, e1355fb_setup },
		349	#endif
		350	#ifdef CONFIG_FB_PVR2
		351	{ "pvr2fb", pvr2fb_init, pvr2fb_setup },
		352	#endif
		353	#ifdef CONFIG_FB_PMAG_BA
		354	{ "pmagbafb", pmagbafb_init, NULL },
		355	#endif
		356	#ifdef CONFIG_FB_PMAGB_B
		357	{ "pmagbbfb", pmagbbfb_init, NULL },
		358	#endif
		359	#ifdef CONFIG_FB_MAXINE
		360	{ "maxinefb", maxinefb_init, NULL },
		361	#endif
		362	#ifdef CONFIG_FB_VOODOO1
		363	{ "sstfb", sstfb_init, sstfb_setup },
		364	#endif
		365	/*
		366	* Generic drivers that don't use resource management (yet)
		367	*/
		368
		369	#ifdef CONFIG_FB_VGA16
		370	{ "vga16fb", vga16fb_init, vga16fb_setup },
		371	#endif
		372
		373	#ifdef CONFIG_GSP_RESOLVER
		374	/* Not a real frame buffer device... */
		375	{ "resolverfb", NULL, resolver_video_setup },
		376	#endif
		377
		378	#ifdef CONFIG_FB_VIRTUAL
		379	/*
		380	* Vfb must be last to avoid that it becomes your primary display if
		381	* other display devices are present
		382	*/
		383	{ "vfb", vfb_init, vfb_setup },
		384	#endif
		385	};
		386
		387	#define NUM_FB_DRIVERS (sizeof(fb_drivers)/sizeof(*fb_drivers))
		388	#define FBPIXMAPSIZE 8192
		389
468	giacomo	390	//extern const char *global_mode_option;
466	giacomo	391
		392	static initcall_t pref_init_funcs[FB_MAX];
		393	static int num_pref_init_funcs __initdata = 0;
		394	struct fb_info *registered_fb[FB_MAX];
		395	int num_registered_fb;
		396
		397	#ifdef CONFIG_FB_OF
		398	static int ofonly __initdata = 0;
		399	#endif
		400
		401	/*
		402	* Drawing helpers.
		403	*/
		404	u8 sys_inbuf(u8 *src)
		405	{
		406	return *src;
		407	}
		408
		409	void sys_outbuf(u8 src, u8 dst, unsigned int size)
		410	{
		411	memcpy(dst, src, size);
		412	}
		413
		414	void move_buf_aligned(struct fb_info info, u8 dst, u8 *src, u32 d_pitch,
		415	u32 s_pitch, u32 height)
		416	{
		417	int i;
		418
		419	for (i = height; i--; ) {
		420	info->pixmap.outbuf(src, dst, s_pitch);
		421	src += s_pitch;
		422	dst += d_pitch;
		423	}
		424	}
		425
		426	void move_buf_unaligned(struct fb_info info, u8 dst, u8 *src, u32 d_pitch,
		427	u32 height, u32 mask, u32 shift_high, u32 shift_low,
		428	u32 mod, u32 idx)
		429	{
		430	int i, j;
		431	u8 tmp;
		432
		433	for (i = height; i--; ) {
		434	for (j = 0; j < idx; j++) {
		435	tmp = info->pixmap.inbuf(dst+j);
		436	tmp &= mask;
		437	tmp \|= *src >> shift_low;
		438	info->pixmap.outbuf(&tmp, dst+j, 1);
		439	tmp = *src << shift_high;
		440	info->pixmap.outbuf(&tmp, dst+j+1, 1);
		441	src++;
		442	}
		443	tmp = info->pixmap.inbuf(dst+idx);
		444	tmp &= mask;
		445	tmp \|= *src >> shift_low;
		446	info->pixmap.outbuf(&tmp, dst+idx, 1);
		447	if (shift_high < mod) {
		448	tmp = *src << shift_high;
		449	info->pixmap.outbuf(&tmp, dst+idx+1, 1);
		450	}
		451	src++;
		452	dst += d_pitch;
		453	}
		454	}
		455
		456	/*
		457	* we need to lock this section since fb_cursor
		458	* may use fb_imageblit()
		459	*/
		460	u32 fb_get_buffer_offset(struct fb_info *info, u32 size)
		461	{
		462	u32 align = info->pixmap.buf_align - 1;
		463	u32 offset, count = 1000;
		464
		465	spin_lock(&info->pixmap.lock);
		466	offset = info->pixmap.offset + align;
		467	offset &= ~align;
		468	if (offset + size > info->pixmap.size) {
		469	while (atomic_read(&info->pixmap.count) && count--);
		470	if (info->fbops->fb_sync &&
		471	info->pixmap.flags & FB_PIXMAP_SYNC)
		472	info->fbops->fb_sync(info);
		473	offset = 0;
		474	}
		475	info->pixmap.offset = offset + size;
		476	atomic_inc(&info->pixmap.count);
		477	smp_mb__after_atomic_inc();
		478	spin_unlock(&info->pixmap.lock);
		479	return offset;
		480	}
		481
		482	#ifdef CONFIG_LOGO
		483	#include <linux/linux_logo.h>
		484
		485	static inline unsigned safe_shift(unsigned d, int n)
		486	{
		487	return n < 0 ? d >> -n : d << n;
		488	}
		489
		490	static void __init fb_set_logocmap(struct fb_info *info,
		491	const struct linux_logo *logo)
		492	{
		493	struct fb_cmap palette_cmap;
		494	u16 palette_green[16];
		495	u16 palette_blue[16];
		496	u16 palette_red[16];
		497	int i, j, n;
		498	const unsigned char *clut = logo->clut;
		499
		500	palette_cmap.start = 0;
		501	palette_cmap.len = 16;
		502	palette_cmap.red = palette_red;
		503	palette_cmap.green = palette_green;
		504	palette_cmap.blue = palette_blue;
		505	palette_cmap.transp = NULL;
		506
		507	for (i = 0; i < logo->clutsize; i += n) {
		508	n = logo->clutsize - i;
		509	/* palette_cmap provides space for only 16 colors at once */
		510	if (n > 16)
		511	n = 16;
		512	palette_cmap.start = 32 + i;
		513	palette_cmap.len = n;
		514	for (j = 0; j < n; ++j) {
		515	palette_cmap.red[j] = clut[0] << 8 \| clut[0];
		516	palette_cmap.green[j] = clut[1] << 8 \| clut[1];
		517	palette_cmap.blue[j] = clut[2] << 8 \| clut[2];
		518	clut += 3;
		519	}
		520	fb_set_cmap(&palette_cmap, 1, info);
		521	}
		522	}
		523
		524	static void __init fb_set_logo_truepalette(struct fb_info *info,
		525	const struct linux_logo *logo,
		526	u32 *palette)
		527	{
		528	unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
		529	unsigned char redmask, greenmask, bluemask;
		530	int redshift, greenshift, blueshift;
		531	int i;
		532	const unsigned char *clut = logo->clut;
		533
		534	/*
		535	* We have to create a temporary palette since console palette is only
		536	* 16 colors long.
		537	*/
		538	/* Bug: Doesn't obey msb_right ... (who needs that?) */
		539	redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
		540	greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
		541	bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
		542	redshift = info->var.red.offset - (8 - info->var.red.length);
		543	greenshift = info->var.green.offset - (8 - info->var.green.length);
		544	blueshift = info->var.blue.offset - (8 - info->var.blue.length);
		545
		546	for ( i = 0; i < logo->clutsize; i++) {
		547	palette[i+32] = (safe_shift((clut[0] & redmask), redshift) \|
		548	safe_shift((clut[1] & greenmask), greenshift) \|
		549	safe_shift((clut[2] & bluemask), blueshift));
		550	clut += 3;
		551	}
		552	}
		553
		554	static void __init fb_set_logo_directpalette(struct fb_info *info,
		555	const struct linux_logo *logo,
		556	u32 *palette)
		557	{
		558	int redshift, greenshift, blueshift;
		559	int i;
		560
		561	redshift = info->var.red.offset;
		562	greenshift = info->var.green.offset;
		563	blueshift = info->var.blue.offset;
		564
		565	for (i = 32; i < logo->clutsize; i++)
		566	palette[i] = i << redshift \| i << greenshift \| i << blueshift;
		567	}
		568
		569	static void __init fb_set_logo(struct fb_info *info,
		570	const struct linux_logo logo, u8 dst,
		571	int depth)
		572	{
		573	int i, j, shift;
		574	const u8 *src = logo->data;
		575	u8 d, xor = 0;
		576
		577	switch (depth) {
		578	case 4:
		579	for (i = 0; i < logo->height; i++)
		580	for (j = 0; j < logo->width; src++) {
		581	dst++ = src >> 4;
		582	j++;
		583	if (j < logo->width) {
		584	dst++ = src & 0x0f;
		585	j++;
		586	}
		587	}
		588	break;
		589	case ~1:
		590	xor = 0xff;
		591	case 1:
		592	for (i = 0; i < logo->height; i++) {
		593	shift = 7;
		594	d = *src++ ^ xor;
		595	for (j = 0; j < logo->width; j++) {
		596	*dst++ = (d >> shift) & 1;
		597	shift = (shift-1) & 7;
		598	if (shift == 7)
		599	d = *src++ ^ xor;
		600	}
		601	}
		602	break;
		603	}
		604	}
		605
		606	/*
		607	* Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
		608	* linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
		609	* the visual format and color depth of the framebuffer, the DAC, the
		610	* pseudo_palette, and the logo data will be adjusted accordingly.
		611	*
		612	* Case 1 - linux_logo_clut224:
		613	* Color exceeds the number of console colors (16), thus we set the hardware DAC
		614	* using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
		615	*
		616	* For visuals that require color info from the pseudo_palette, we also construct
		617	* one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
		618	* will be set.
		619	*
		620	* Case 2 - linux_logo_vga16:
		621	* The number of colors just matches the console colors, thus there is no need
		622	* to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
		623	* each byte contains color information for two pixels (upper and lower nibble).
		624	* To be consistent with fb_imageblit() usage, we therefore separate the two
		625	* nibbles into separate bytes. The "depth" flag will be set to 4.
		626	*
		627	* Case 3 - linux_logo_mono:
		628	* This is similar with Case 2. Each byte contains information for 8 pixels.
		629	* We isolate each bit and expand each into a byte. The "depth" flag will
		630	* be set to 1.
		631	*/
		632	static struct logo_data {
		633	int depth;
		634	int needs_directpalette;
		635	int needs_truepalette;
		636	int needs_cmapreset;
		637	const struct linux_logo *logo;
		638	} fb_logo;
		639
		640	int fb_prepare_logo(struct fb_info *info)
		641	{
		642	memset(&fb_logo, 0, sizeof(struct logo_data));
		643
		644	switch (info->fix.visual) {
		645	case FB_VISUAL_TRUECOLOR:
		646	if (info->var.bits_per_pixel >= 8)
		647	fb_logo.needs_truepalette = 1;
		648	break;
		649	case FB_VISUAL_DIRECTCOLOR:
		650	if (info->var.bits_per_pixel >= 24) {
		651	fb_logo.needs_directpalette = 1;
		652	fb_logo.needs_cmapreset = 1;
		653	}
		654	break;
		655	case FB_VISUAL_PSEUDOCOLOR:
		656	fb_logo.needs_cmapreset = 1;
		657	break;
		658	}
		659
		660	/* Return if no suitable logo was found */
		661	fb_logo.logo = fb_find_logo(info->var.bits_per_pixel);
		662
		663	if (!fb_logo.logo \|\| fb_logo.logo->height > info->var.yres) {
		664	fb_logo.logo = NULL;
		665	return 0;
		666	}
		667	/* What depth we asked for might be different from what we get */
		668	if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
		669	fb_logo.depth = 8;
		670	else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
		671	fb_logo.depth = 4;
		672	else
		673	fb_logo.depth = 1;
		674	return fb_logo.logo->height;
		675	}
		676
		677	int fb_show_logo(struct fb_info *info)
		678	{
		679	u32 palette = NULL, saved_pseudo_palette = NULL;
		680	unsigned char *logo_new = NULL;
		681	struct fb_image image;
		682	int x;
		683
		684	/* Return if the frame buffer is not mapped */
		685	if (fb_logo.logo == NULL)
		686	return 0;
		687
		688	image.depth = fb_logo.depth;
		689	image.data = fb_logo.logo->data;
		690
		691	if (fb_logo.needs_cmapreset)
		692	fb_set_logocmap(info, fb_logo.logo);
		693
		694	if (fb_logo.needs_truepalette \|\|
		695	fb_logo.needs_directpalette) {
		696	palette = kmalloc(256 * 4, GFP_KERNEL);
		697	if (palette == NULL)
		698	return 0;
		699
		700	if (fb_logo.needs_truepalette)
		701	fb_set_logo_truepalette(info, fb_logo.logo, palette);
		702	else
		703	fb_set_logo_directpalette(info, fb_logo.logo, palette);
		704
		705	saved_pseudo_palette = info->pseudo_palette;
		706	info->pseudo_palette = palette;
		707	}
		708
		709	if (fb_logo.depth == 4) {
		710	logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
		711	GFP_KERNEL);
		712	if (logo_new == NULL) {
		713	if (palette)
		714	kfree(palette);
		715	if (saved_pseudo_palette)
		716	info->pseudo_palette = saved_pseudo_palette;
		717	return 0;
		718	}
		719	image.data = logo_new;
		720	fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
		721	}
		722
		723	image.width = fb_logo.logo->width;
		724	image.height = fb_logo.logo->height;
		725	image.dy = 0;
		726
		727	for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
		728	x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
		729	image.dx = x;
		730	info->fbops->fb_imageblit(info, &image);
		731	//atomic_dec(&info->pixmap.count);
		732	//smp_mb__after_atomic_dec();
		733	}
		734
		735	if (palette != NULL)
		736	kfree(palette);
		737	if (saved_pseudo_palette != NULL)
		738	info->pseudo_palette = saved_pseudo_palette;
		739	if (logo_new != NULL)
		740	kfree(logo_new);
		741	return fb_logo.logo->height;
		742	}
		743	#else
		744	int fb_prepare_logo(struct fb_info *info) { return 0; }
		745	int fb_show_logo(struct fb_info *info) { return 0; }
		746	#endif /* CONFIG_LOGO */
		747
		748	static int fbmem_read_proc(char buf, char *start, off_t offset,
		749	int len, int eof, void private)
		750	{
		751	struct fb_info **fi;
		752	int clen;
		753
		754	clen = 0;
		755	for (fi = registered_fb; fi < &registered_fb[FB_MAX] && len < 4000; fi++)
		756	if (*fi)
		757	clen += sprintf26(buf + clen, "%d %s\n",
		758	(*fi)->node,
		759	(*fi)->fix.id);
		760	*start = buf + offset;
		761	if (clen > offset)
		762	clen -= offset;
		763	else
		764	clen = 0;
		765	return clen < len ? clen : len;
		766	}
		767
		768	static ssize_t
		769	fb_read(struct file file, char buf, size_t count, loff_t *ppos)
		770	{
		771	unsigned long p = *ppos;
		772	struct inode *inode = file->f_dentry->d_inode;
		773	int fbidx = iminor(inode);
		774	struct fb_info *info = registered_fb[fbidx];
		775
		776	if (!info \|\| ! info->screen_base)
		777	return -ENODEV;
		778
		779	if (info->fbops->fb_read)
		780	return info->fbops->fb_read(file, buf, count, ppos);
		781
		782	if (p >= info->fix.smem_len)
		783	return 0;
		784	if (count >= info->fix.smem_len)
		785	count = info->fix.smem_len;
		786	if (count + p > info->fix.smem_len)
		787	count = info->fix.smem_len - p;
		788	if (info->fbops->fb_sync)
		789	info->fbops->fb_sync(info);
		790	if (count) {
		791	char *base_addr;
		792
		793	base_addr = info->screen_base;
		794	count -= copy_to_user(buf, base_addr+p, count);
		795	if (!count)
		796	return -EFAULT;
		797	*ppos += count;
		798	}
		799	return count;
		800	}
		801
		802	static ssize_t
		803	fb_write(struct file file, const char buf, size_t count, loff_t *ppos)
		804	{
		805	unsigned long p = *ppos;
		806	struct inode *inode = file->f_dentry->d_inode;
		807	int fbidx = iminor(inode);
		808	struct fb_info *info = registered_fb[fbidx];
		809	int err;
		810
		811	if (!info \|\| !info->screen_base)
		812	return -ENODEV;
		813
		814	if (info->fbops->fb_write)
		815	return info->fbops->fb_write(file, buf, count, ppos);
		816
		817	if (p > info->fix.smem_len)
		818	return -ENOSPC;
		819	if (count >= info->fix.smem_len)
		820	count = info->fix.smem_len;
		821	err = 0;
		822	if (count + p > info->fix.smem_len) {
		823	count = info->fix.smem_len - p;
		824	err = -ENOSPC;
		825	}
		826	if (info->fbops->fb_sync)
		827	info->fbops->fb_sync(info);
		828	if (count) {
		829	char *base_addr;
		830
		831	base_addr = info->screen_base;
		832	count -= copy_from_user(base_addr+p, buf, count);
		833	*ppos += count;
		834	err = -EFAULT;
		835	}
		836	if (count)
		837	return count;
		838	return err;
		839	}
		840
		841	#ifdef CONFIG_KMOD
		842	static void try_to_load(int fb)
		843	{
		844	request_module("fb%d", fb);
		845	}
		846	#endif /* CONFIG_KMOD */
		847
		848	int
		849	fb_cursor(struct fb_info info, struct fb_cursor sprite)
		850	{
		851	struct fb_cursor cursor;
		852	int err;
		853
		854	if (copy_from_user(&cursor, sprite, sizeof(struct fb_cursor)))
		855	return -EFAULT;
		856
		857	if (cursor.set & FB_CUR_SETCUR)
		858	info->cursor.enable = 1;
		859
		860	if (cursor.set & FB_CUR_SETCMAP) {
		861	err = fb_copy_cmap(&cursor.image.cmap, &sprite->image.cmap, 1);
		862	if (err)
		863	return err;
		864	}
		865
		866	if (cursor.set & FB_CUR_SETSHAPE) {
		867	int size = ((cursor.image.width + 7) >> 3) * cursor.image.height;
		868	if ((cursor.image.height != info->cursor.image.height) \|\|
		869	(cursor.image.width != info->cursor.image.width))
		870	cursor.set \|= FB_CUR_SETSIZE;
		871
		872	cursor.image.data = kmalloc(size, GFP_KERNEL);
		873	if (!cursor.image.data)
		874	return -ENOMEM;
		875
		876	cursor.mask = kmalloc(size, GFP_KERNEL);
		877	if (!cursor.mask) {
		878	kfree(cursor.image.data);
		879	return -ENOMEM;
		880	}
		881
		882	if (copy_from_user(&cursor.image.data, sprite->image.data, size) \|\|
		883	copy_from_user(cursor.mask, sprite->mask, size)) {
		884	kfree(cursor.image.data);
		885	kfree(cursor.mask);
		886	return -EFAULT;
		887	}
		888	}
		889	info->cursor.set = cursor.set;
		890	info->cursor.rop = cursor.rop;
		891	err = info->fbops->fb_cursor(info, &cursor);
		892	return err;
		893	}
		894
		895	int
		896	fb_pan_display(struct fb_info info, struct fb_var_screeninfo var)
		897	{
		898	int xoffset = var->xoffset;
		899	int yoffset = var->yoffset;
		900	int err;
		901
		902	if (xoffset < 0 \|\| yoffset < 0 \|\| !info->fbops->fb_pan_display \|\|
		903	xoffset + info->var.xres > info->var.xres_virtual \|\|
		904	yoffset + info->var.yres > info->var.yres_virtual)
		905	return -EINVAL;
		906	if ((err = info->fbops->fb_pan_display(var, info)))
		907	return err;
		908	info->var.xoffset = var->xoffset;
		909	info->var.yoffset = var->yoffset;
		910	if (var->vmode & FB_VMODE_YWRAP)
		911	info->var.vmode \|= FB_VMODE_YWRAP;
		912	else
		913	info->var.vmode &= ~FB_VMODE_YWRAP;
		914	return 0;
		915	}
		916
		917	int
		918	fb_set_var(struct fb_info info, struct fb_var_screeninfo var)
		919	{
		920	int err;
		921
		922	if (memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
		923	if (!info->fbops->fb_check_var) {
		924	*var = info->var;
		925	return 0;
		926	}
		927
		928	if ((err = info->fbops->fb_check_var(var, info)))
		929	return err;
		930
		931	if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
		932	info->var = *var;
		933
		934	if (info->fbops->fb_set_par)
		935	info->fbops->fb_set_par(info);
		936
		937	fb_pan_display(info, &info->var);
		938
		939	fb_set_cmap(&info->cmap, 1, info);
		940	}
		941	}
		942	return 0;
		943	}
		944
		945	int
		946	fb_blank(struct fb_info *info, int blank)
		947	{
		948	/* ??? Variable sized stack allocation. */
		949	u16 black[info->cmap.len];
		950	struct fb_cmap cmap;
		951
		952	if (info->fbops->fb_blank && !info->fbops->fb_blank(blank, info))
		953	return 0;
		954	if (blank) {
		955	memset(black, 0, info->cmap.len * sizeof(u16));
		956	cmap.red = cmap.green = cmap.blue = black;
		957	cmap.transp = info->cmap.transp ? black : NULL;
		958	cmap.start = info->cmap.start;
		959	cmap.len = info->cmap.len;
		960	} else
		961	cmap = info->cmap;
		962	return fb_set_cmap(&cmap, 1, info);
		963	}
		964
472	giacomo	965	int
466	giacomo	966	fb_ioctl(struct inode inode, struct file file, unsigned int cmd,
		967	unsigned long arg)
		968	{
		969	int fbidx = iminor(inode);
		970	struct fb_info *info = registered_fb[fbidx];
		971	struct fb_ops *fb = info->fbops;
		972	struct fb_var_screeninfo var;
		973	struct fb_fix_screeninfo fix;
		974	#ifdef CONFIG_FRAMEBUFFER_CONSOLE
		975	struct fb_con2fbmap con2fb;
		976	#endif
		977	struct fb_cmap cmap;
482	giacomo	978	struct fb_fillrect rect;
466	giacomo	979	int i;
		980
		981	if (!fb)
		982	return -ENODEV;
		983	switch (cmd) {
		984	case FBIOGET_VSCREENINFO:
		985	return copy_to_user((void *) arg, &info->var,
		986	sizeof(var)) ? -EFAULT : 0;
		987	case FBIOPUT_VSCREENINFO:
		988	if (copy_from_user(&var, (void *) arg, sizeof(var)))
		989	return -EFAULT;
		990	i = fb_set_var(info, &var);
		991	if (i) return i;
		992	if (copy_to_user((void *) arg, &var, sizeof(var)))
		993	return -EFAULT;
482	giacomo	994
		995	rect.dx = 0;
		996	rect.dy = 0;
		997	rect.width = info->var.xres;
		998	rect.height = info->var.yres;
		999	rect.color = 0;
		1000	rect.rop = ROP_COPY;
		1001
		1002	cfb_fillrect(info,&rect);
		1003
		1004	if (info->var.bits_per_pixel >= 8) {
		1005
		1006	fb_prepare_logo(info);
		1007	fb_show_logo(info);
		1008
		1009	}
		1010
466	giacomo	1011	return 0;
		1012	case FBIOGET_FSCREENINFO:
		1013	return copy_to_user((void *) arg, &info->fix,
		1014	sizeof(fix)) ? -EFAULT : 0;
		1015	case FBIOPUTCMAP:
		1016	if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
		1017	return -EFAULT;
		1018	return (fb_set_cmap(&cmap, 0, info));
		1019	case FBIOGETCMAP:
		1020	if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
		1021	return -EFAULT;
		1022	return (fb_copy_cmap(&info->cmap, &cmap, 0));
		1023	case FBIOPAN_DISPLAY:
		1024	if (copy_from_user(&var, (void *) arg, sizeof(var)))
		1025	return -EFAULT;
		1026	if ((i = fb_pan_display(info, &var)))
		1027	return i;
		1028	if (copy_to_user((void *) arg, &var, sizeof(var)))
		1029	return -EFAULT;
		1030	return 0;
		1031	case FBIO_CURSOR:
		1032	return (fb_cursor(info, (struct fb_cursor *) arg));
		1033	#ifdef CONFIG_FRAMEBUFFER_CONSOLE
		1034	case FBIOGET_CON2FBMAP:
		1035	if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
		1036	return -EFAULT;
		1037	if (con2fb.console < 1 \|\| con2fb.console > MAX_NR_CONSOLES)
		1038	return -EINVAL;
		1039	con2fb.framebuffer = con2fb_map[con2fb.console-1];
		1040	return copy_to_user((void *)arg, &con2fb,
		1041	sizeof(con2fb)) ? -EFAULT : 0;
		1042	case FBIOPUT_CON2FBMAP:
		1043	if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
		1044	return - EFAULT;
		1045	if (con2fb.console < 0 \|\| con2fb.console > MAX_NR_CONSOLES)
		1046	return -EINVAL;
		1047	if (con2fb.framebuffer < 0 \|\| con2fb.framebuffer >= FB_MAX)
		1048	return -EINVAL;
		1049	#ifdef CONFIG_KMOD
		1050	if (!registered_fb[con2fb.framebuffer])
		1051	try_to_load(con2fb.framebuffer);
		1052	#endif /* CONFIG_KMOD */
		1053	if (!registered_fb[con2fb.framebuffer])
		1054	return -EINVAL;
		1055	if (con2fb.console != 0)
		1056	set_con2fb_map(con2fb.console-1, con2fb.framebuffer);
		1057	else
		1058	fb_console_init();
		1059	return 0;
		1060	#endif /* CONFIG_FRAMEBUFFER_CONSOLE */
		1061	case FBIOBLANK:
483	giacomo	1062	return fb_blank(info, arg);
466	giacomo	1063	default:
		1064	if (fb->fb_ioctl == NULL)
		1065	return -EINVAL;
		1066	return fb->fb_ioctl(inode, file, cmd, arg, info);
		1067	}
		1068	}
		1069
		1070	static int
		1071	fb_mmap(struct file file, struct vm_area_struct vma)
		1072	{
		1073	int fbidx = iminor(file->f_dentry->d_inode);
		1074	struct fb_info *info = registered_fb[fbidx];
		1075	struct fb_ops *fb = info->fbops;
		1076	unsigned long off;
		1077	#if !defined(__sparc__) \|\| defined(__sparc_v9__)
		1078	unsigned long start;
		1079	u32 len;
		1080	#endif
		1081
		1082	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
		1083	return -EINVAL;
		1084	off = vma->vm_pgoff << PAGE_SHIFT;
		1085	if (!fb)
		1086	return -ENODEV;
		1087	if (fb->fb_mmap) {
		1088	int res;
		1089	lock_kernel();
		1090	res = fb->fb_mmap(info, file, vma);
		1091	unlock_kernel();
		1092	return res;
		1093	}
		1094
		1095	#if defined(__sparc__) && !defined(__sparc_v9__)
		1096	/* Should never get here, all fb drivers should have their own
		1097	mmap routines */
		1098	return -EINVAL;
		1099	#else
		1100	/* !sparc32... */
		1101	lock_kernel();
		1102
		1103	/* frame buffer memory */
		1104	start = info->fix.smem_start;
		1105	len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
		1106	if (off >= len) {
		1107	/* memory mapped io */
		1108	off -= len;
		1109	if (info->var.accel_flags) {
		1110	unlock_kernel();
		1111	return -EINVAL;
		1112	}
		1113	start = info->fix.mmio_start;
		1114	len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
		1115	}
		1116	unlock_kernel();
		1117	start &= PAGE_MASK;
		1118	if ((vma->vm_end - vma->vm_start + off) > len)
		1119	return -EINVAL;
		1120	off += start;
		1121	vma->vm_pgoff = off >> PAGE_SHIFT;
		1122	/* This is an IO map - tell maydump to skip this VMA */
		1123	vma->vm_flags \|= VM_IO;
		1124	#if defined(__sparc_v9__)
		1125	vma->vm_flags \|= (VM_SHM \| VM_LOCKED);
		1126	if (io_remap_page_range(vma, vma->vm_start, off,
		1127	vma->vm_end - vma->vm_start, vma->vm_page_prot, 0))
		1128	return -EAGAIN;
		1129	#else
		1130	#if defined(__mc68000__)
		1131	#if defined(CONFIG_SUN3)
		1132	pgprot_val(vma->vm_page_prot) \|= SUN3_PAGE_NOCACHE;
		1133	#elif defined(CONFIG_MMU)
		1134	if (CPU_IS_020_OR_030)
		1135	pgprot_val(vma->vm_page_prot) \|= _PAGE_NOCACHE030;
		1136	if (CPU_IS_040_OR_060) {
		1137	pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
		1138	/* Use no-cache mode, serialized */
		1139	pgprot_val(vma->vm_page_prot) \|= _PAGE_NOCACHE_S;
		1140	}
		1141	#endif
		1142	#elif defined(__powerpc__)
		1143	pgprot_val(vma->vm_page_prot) \|= _PAGE_NO_CACHE\|_PAGE_GUARDED;
		1144	#elif defined(__alpha__)
		1145	/* Caching is off in the I/O space quadrant by design. */
		1146	#elif defined(__i386__) \|\| defined(__x86_64__)
468	giacomo	1147	//if (boot_cpu_data.x86 > 3)
		1148	// pgprot_val(vma->vm_page_prot) \|= _PAGE_PCD;
466	giacomo	1149	#elif defined(__mips__)
		1150	pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
		1151	pgprot_val(vma->vm_page_prot) \|= _CACHE_UNCACHED;
		1152	#elif defined(__sh__)
		1153	pgprot_val(vma->vm_page_prot) &= ~_PAGE_CACHABLE;
		1154	#elif defined(__hppa__)
		1155	pgprot_val(vma->vm_page_prot) \|= _PAGE_NO_CACHE;
		1156	#elif defined(__ia64__) \|\| defined(__arm__)
		1157	vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
		1158	#else
		1159	#warning What do we have to do here??
		1160	#endif
		1161	if (io_remap_page_range(vma, vma->vm_start, off,
		1162	vma->vm_end - vma->vm_start, vma->vm_page_prot))
		1163	return -EAGAIN;
		1164	#endif /* !__sparc_v9__ */
		1165	return 0;
		1166	#endif /* !sparc32 */
		1167	}
		1168
470	giacomo	1169	static int
466	giacomo	1170	fb_open(struct inode inode, struct file file)
		1171	{
		1172	int fbidx = iminor(inode);
		1173	struct fb_info *info;
477	giacomo	1174	struct fb_fillrect rect;
476	giacomo	1175	int res = 0;
466	giacomo	1176
		1177	if (fbidx >= FB_MAX)
		1178	return -ENODEV;
		1179	#ifdef CONFIG_KMOD
		1180	if (!(info = registered_fb[fbidx]))
		1181	try_to_load(fbidx);
		1182	#endif /* CONFIG_KMOD */
		1183	if (!(info = registered_fb[fbidx]))
		1184	return -ENODEV;
		1185	if (!try_module_get(info->fbops->owner))
		1186	return -ENODEV;
		1187	if (info->fbops->fb_open) {
		1188	res = info->fbops->fb_open(info,1);
		1189	if (res)
		1190	module_put(info->fbops->owner);
		1191	}
475	giacomo	1192
476	giacomo	1193	info->fbops->fb_set_par(info);
		1194	fb_pan_display(info, &info->var);
		1195
477	giacomo	1196	rect.dx = 0;
		1197	rect.dy = 0;
		1198	rect.width = info->var.xres;
		1199	rect.height = info->var.yres;
		1200	rect.color = 0;
		1201	rect.rop = ROP_COPY;
		1202
		1203	cfb_fillrect(info,&rect);
		1204
476	giacomo	1205	if (info->var.bits_per_pixel >= 8) {
		1206
		1207	fb_prepare_logo(info);
		1208	fb_show_logo(info);
		1209
		1210	}
475	giacomo	1211
466	giacomo	1212	return res;
		1213	}
		1214
470	giacomo	1215	static int
466	giacomo	1216	fb_release(struct inode inode, struct file file)
		1217	{
		1218	int fbidx = iminor(inode);
		1219	struct fb_info *info;
		1220
		1221	lock_kernel();
		1222	info = registered_fb[fbidx];
		1223	if (info->fbops->fb_release)
		1224	info->fbops->fb_release(info,1);
		1225	module_put(info->fbops->owner);
		1226	unlock_kernel();
475	giacomo	1227
466	giacomo	1228	return 0;
		1229	}
		1230
		1231	static struct file_operations fb_fops = {
		1232	.owner = THIS_MODULE,
		1233	.read = fb_read,
		1234	.write = fb_write,
		1235	.ioctl = fb_ioctl,
		1236	.mmap = fb_mmap,
		1237	.open = fb_open,
		1238	.release = fb_release,
		1239	#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
		1240	.get_unmapped_area = get_fb_unmapped_area,
		1241	#endif
		1242	};
		1243
		1244	/**
		1245	* register_framebuffer - registers a frame buffer device
		1246	* @fb_info: frame buffer info structure
		1247	*
		1248	* Registers a frame buffer device @fb_info.
		1249	*
		1250	* Returns negative errno on error, or zero for success.
		1251	*
		1252	*/
		1253
		1254	int
		1255	register_framebuffer(struct fb_info *fb_info)
		1256	{
		1257	int i;
		1258
		1259	if (num_registered_fb == FB_MAX)
		1260	return -ENXIO;
		1261	num_registered_fb++;
		1262	for (i = 0 ; i < FB_MAX; i++)
		1263	if (!registered_fb[i])
		1264	break;
		1265	fb_info->node = i;
		1266
		1267	if (fb_info->pixmap.addr == NULL) {
		1268	fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
		1269	if (fb_info->pixmap.addr) {
		1270	fb_info->pixmap.size = FBPIXMAPSIZE;
		1271	fb_info->pixmap.buf_align = 1;
		1272	fb_info->pixmap.scan_align = 1;
		1273	fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
		1274	}
		1275	}
		1276	fb_info->pixmap.offset = 0;
		1277	if (fb_info->pixmap.outbuf == NULL)
		1278	fb_info->pixmap.outbuf = sys_outbuf;
		1279	if (fb_info->pixmap.inbuf == NULL)
		1280	fb_info->pixmap.inbuf = sys_inbuf;
		1281	spin_lock_init(&fb_info->pixmap.lock);
		1282
		1283	registered_fb[i] = fb_info;
		1284
		1285	devfs_mk_cdev(MKDEV(FB_MAJOR, i),
		1286	S_IFCHR \| S_IRUGO \| S_IWUGO, "fb/%d", i);
		1287	return 0;
		1288	}
		1289
		1290
		1291	/**
		1292	* unregister_framebuffer - releases a frame buffer device
		1293	* @fb_info: frame buffer info structure
		1294	*
		1295	* Unregisters a frame buffer device @fb_info.
		1296	*
		1297	* Returns negative errno on error, or zero for success.
		1298	*
		1299	*/
		1300
		1301	int
		1302	unregister_framebuffer(struct fb_info *fb_info)
		1303	{
		1304	int i;
		1305
		1306	i = fb_info->node;
		1307	if (!registered_fb[i])
		1308	return -EINVAL;
		1309	devfs_remove("fb/%d", i);
		1310
		1311	if (fb_info->pixmap.addr)
		1312	kfree(fb_info->pixmap.addr);
		1313	registered_fb[i]=NULL;
		1314	num_registered_fb--;
		1315	return 0;
		1316	}
		1317
		1318
		1319	/**
		1320	* fbmem_init - init frame buffer subsystem
		1321	*
		1322	* Initialize the frame buffer subsystem.
		1323	*
		1324	* NOTE: This function is _only_ to be called by drivers/char/mem.c.
		1325	*
		1326	*/
		1327
		1328	void __init
		1329	fbmem_init(void)
		1330	{
		1331	int i;
		1332
		1333	create_proc_read_entry("fb", 0, 0, fbmem_read_proc, NULL);
		1334
		1335	devfs_mk_dir("fb");
		1336	if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
		1337	printk("unable to get major %d for fb devs\n", FB_MAJOR);
		1338
		1339	#ifdef CONFIG_FB_OF
		1340	if (ofonly) {
		1341	offb_init();
		1342	return;
		1343	}
		1344	#endif
		1345
		1346	/*
		1347	* Probe for all builtin frame buffer devices
		1348	*/
		1349	for (i = 0; i < num_pref_init_funcs; i++)
		1350	pref_init_funcs[i]();
		1351
		1352	for (i = 0; i < NUM_FB_DRIVERS; i++)
		1353	if (fb_drivers[i].init)
		1354	fb_drivers[i].init();
		1355	}
		1356
469	giacomo	1357	extern int linuxcomp_setfd(struct inode *i, int i_rdev);
466	giacomo	1358
469	giacomo	1359	/* Shark Inode emulation */
		1360	int fb_open_inode(int num) {
470	giacomo	1361
		1362	struct inode *i;
		1363
		1364	i = (struct inode *)kmalloc(sizeof(struct inode),GFP_KERNEL);
		1365
		1366	linuxcomp_setfd(i,num);
		1367
472	giacomo	1368	if (fb_open(i,NULL)) {
		1369	kfree(i);
		1370	return -1;
		1371	}
469	giacomo	1372
475	giacomo	1373	kfree(i);
470	giacomo	1374	return 0;
		1375
		1376	}
		1377
		1378	/* Shark Inode emulation */
		1379	int fb_close_inode(int num) {
		1380
469	giacomo	1381	struct inode *i;
		1382
		1383	i = (struct inode *)kmalloc(sizeof(struct inode),GFP_KERNEL);
		1384
		1385	linuxcomp_setfd(i,num);
		1386
472	giacomo	1387	if(fb_release(i,NULL)) {
		1388	kfree(i);
		1389	return -1;
		1390	}
469	giacomo	1391
470	giacomo	1392	kfree(i);
		1393
469	giacomo	1394	return 0;
		1395
		1396	}
		1397
483	giacomo	1398	int fb_set_mode_inode(int num, unsigned char *modeopt) {
472	giacomo	1399
		1400	struct inode *i;
		1401	struct fb_var_screeninfo var;
483	giacomo	1402	struct fb_info *info = registered_fb[num];
472	giacomo	1403
		1404	i = (struct inode *)kmalloc(sizeof(struct inode),GFP_KERNEL);
		1405
		1406	linuxcomp_setfd(i,num);
		1407
		1408	if (fb_ioctl(i, NULL, FBIOGET_VSCREENINFO, (unsigned long)&var)) {
		1409	kfree(i);
		1410	return -1;
483	giacomo	1411	}
472	giacomo	1412
483	giacomo	1413	fb_find_mode(&var,info,modeopt,NULL,0,NULL,0);
		1414
472	giacomo	1415	var.xoffset = 0;
		1416	var.yoffset = 0;
483	giacomo	1417	var.xres_virtual = var.xres;
		1418	var.yres_virtual = var.yres;
472	giacomo	1419
		1420	if (fb_ioctl(i, NULL, FBIOPUT_VSCREENINFO, (unsigned long)&var)) {
		1421	kfree(i);
		1422	return -1;
		1423	}
		1424
		1425	kfree(i);
		1426
		1427	return 0;
		1428
		1429	}
		1430
466	giacomo	1431	/**
		1432	* video_setup - process command line options
		1433	* @options: string of options
		1434	*
		1435	* Process command line options for frame buffer subsystem.
		1436	*
		1437	* NOTE: This function is a __setup and __init function.
		1438	*
		1439	* Returns zero.
		1440	*
		1441	*/
		1442
		1443	int __init video_setup(char *options)
		1444	{
		1445	int i, j;
		1446
		1447	if (!options \|\| !*options)
		1448	return 0;
		1449
		1450	#ifdef CONFIG_FB_OF
		1451	if (!strcmp(options, "ofonly")) {
		1452	ofonly = 1;
		1453	return 0;
		1454	}
		1455	#endif
		1456
		1457	if (num_pref_init_funcs == FB_MAX)
		1458	return 0;
		1459
		1460	for (i = 0; i < NUM_FB_DRIVERS; i++) {
		1461	j = strlen(fb_drivers[i].name);
		1462	if (!strncmp(options, fb_drivers[i].name, j) &&
		1463	options[j] == ':') {
		1464	if (!strcmp(options+j+1, "off"))
		1465	fb_drivers[i].init = NULL;
		1466	else {
		1467	if (fb_drivers[i].init) {
		1468	pref_init_funcs[num_pref_init_funcs++] =
		1469	fb_drivers[i].init;
		1470	fb_drivers[i].init = NULL;
		1471	}
		1472	if (fb_drivers[i].setup)
		1473	fb_drivers[i].setup(options+j+1);
		1474	}
		1475	return 0;
		1476	}
		1477	}
		1478
		1479	/*
		1480	* If we get here no fb was specified.
		1481	* We consider the argument to be a global video mode option.
		1482	*/
468	giacomo	1483	//global_mode_option = options;
466	giacomo	1484	return 0;
		1485	}
		1486
		1487	__setup("video=", video_setup);
		1488
		1489	/*
		1490	* Visible symbols for modules
		1491	*/
		1492
		1493	EXPORT_SYMBOL(register_framebuffer);
		1494	EXPORT_SYMBOL(unregister_framebuffer);
		1495	EXPORT_SYMBOL(num_registered_fb);
		1496	EXPORT_SYMBOL(registered_fb);
		1497	EXPORT_SYMBOL(fb_prepare_logo);
		1498	EXPORT_SYMBOL(fb_show_logo);
		1499	EXPORT_SYMBOL(fb_set_var);
		1500	EXPORT_SYMBOL(fb_blank);
		1501	EXPORT_SYMBOL(fb_pan_display);
		1502	EXPORT_SYMBOL(fb_get_buffer_offset);
		1503	EXPORT_SYMBOL(move_buf_unaligned);
		1504	EXPORT_SYMBOL(move_buf_aligned);
		1505
		1506	MODULE_LICENSE("GPL");

Subversion Repositories shark

(root)/shark/trunk/drivers/fb/fbmem.c @ 1022 - Rev 483