sticore.c

linux-2.4.29操作系统的源码

/*
 *  linux/drivers/video/sti/sticore.c -
 *	core code for console driver using HP's STI firmware
 *
 *	Copyright (C) 2000 Philipp Rumpf <[e-mail]>
 *	Portions Copyright (C) 2001-2002 Helge Deller <[e-mail]>
 *	Portions Copyright (C) 2001-2002 Thomas Bogendoerfer <[e-mail]>
 * 
 * TODO:
 * - call STI in virtual mode rather than in real mode
 * - screen blanking with state_mgmt() in text mode STI ? 
 * - try to make it work on m68k hp workstations ;)
 * - clean up the cache flushing functions
 * 
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <video/font.h>

#include <asm/pgalloc.h>
#include <asm/hardware.h>

#include "sticore.h"

#define STI_DRIVERVERSION "0.9"

struct sti_struct *default_sti;

static int num_sti_roms;			  /* # of STI ROMS found */
static struct sti_struct *sti_roms[MAX_STI_ROMS]; /* ptr to each sti_struct */


/* The colour indices used by STI are
 *   0 - Black
 *   1 - White
 *   2 - Red
 *   3 - Yellow/Brown
 *   4 - Green
 *   5 - Cyan
 *   6 - Blue
 *   7 - Magenta
 *
 * So we have the same colours as VGA (basically one bit each for R, G, B),
 * but have to translate them, anyway. */

static const u8 col_trans[8] = {
        0, 6, 4, 5,
        2, 7, 3, 1
};

#define c_fg(sti, c) col_trans[((c>> 8) & 7)]
#define c_bg(sti, c) col_trans[((c>>11) & 7)]
#define c_index(sti, c) ((c) & 0xff)

static const struct sti_init_flags default_init_flags = {
	wait:	STI_WAIT, 
	reset:	1,
	text:	1, 
	nontext:1,
	no_chg_bet: 1, 
	no_chg_bei: 1, 
	init_cmap_tx: 1,
};

int
sti_init_graph(struct sti_struct *sti) 
{
	struct sti_init_inptr_ext inptr_ext = { 0, };
	struct sti_init_inptr inptr = {
		3,	/* # of text planes (3 is maximum for STI) */ 
		STI_PTR(&inptr_ext)
	};
	struct sti_init_outptr outptr = { 0, };
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&sti->lock, flags);

	ret = STI_CALL(sti->init_graph, &default_init_flags, &inptr,
		&outptr, sti->glob_cfg);

	spin_unlock_irqrestore(&sti->lock, flags);

	if (ret < 0) {
		printk(KERN_ERR "STI init_graph failed (ret %d, errno %d)\n",ret,outptr.errno);
		return -1;
	}
	
	sti->text_planes = outptr.text_planes;
	return 0;
}

static const struct sti_conf_flags default_conf_flags = {
		wait:	STI_WAIT,
	};

void
sti_inq_conf(struct sti_struct *sti)
{
	struct sti_conf_inptr inptr = { 0 };
	unsigned long flags;
	s32 ret;

	sti->outptr.ext_ptr = STI_PTR(&sti->outptr_ext);
	
	do {
		spin_lock_irqsave(&sti->lock, flags);
		ret = STI_CALL(sti->inq_conf, &default_conf_flags,
			&inptr, &sti->outptr, sti->glob_cfg);
		spin_unlock_irqrestore(&sti->lock, flags);
	} while (ret == 1);
}

static const struct sti_font_flags default_font_flags = {
		wait:	STI_WAIT,
		non_text: 0,
};

void
sti_putc(struct sti_struct *sti, int c, int y, int x)
{
	struct sti_font_inptr inptr = {
		STI_PTR(sti->font->raw),
		c_index(sti, c), c_fg(sti, c), c_bg(sti, c),
		x * sti->font_width, y * sti->font_height, 0
	};
	struct sti_font_outptr outptr = { 0, };
	s32 ret;
	unsigned long flags;

	do {
		spin_lock_irqsave(&sti->lock, flags);
		ret = STI_CALL(sti->font_unpmv, &default_font_flags,
			&inptr, &outptr, sti->glob_cfg);
		spin_unlock_irqrestore(&sti->lock, flags);
	} while (ret == 1);
}

static const struct sti_blkmv_flags clear_blkmv_flags = {
	wait:	STI_WAIT, 
	color:	1, 
	clear:	1, 
};

void
sti_set(struct sti_struct *sti, int src_y, int src_x,
	int height, int width, u8 color)
{
	struct sti_blkmv_inptr inptr = {
		color, color,
		src_x, src_y ,
		src_x, src_y ,
		width, height,
		0
	};
	struct sti_blkmv_outptr outptr = { 0, };
	s32 ret;
	unsigned long flags;
	
	do {
		spin_lock_irqsave(&sti->lock, flags);
		ret = STI_CALL(sti->block_move, &clear_blkmv_flags,
			&inptr, &outptr, sti->glob_cfg);
		spin_unlock_irqrestore(&sti->lock, flags);
	} while (ret == 1);
}

void
sti_clear(struct sti_struct *sti, int src_y, int src_x,
	  int height, int width, int c)
{
	struct sti_blkmv_inptr inptr = {
		c_fg(sti, c), c_bg(sti, c),
		src_x * sti->font_width, src_y * sti->font_height,
		src_x * sti->font_width, src_y * sti->font_height,
		width * sti->font_width, height* sti->font_height,
		0
	};
	struct sti_blkmv_outptr outptr = { 0, };
	s32 ret;
	unsigned long flags;

	do {
		spin_lock_irqsave(&sti->lock, flags);
		ret = STI_CALL(sti->block_move, &clear_blkmv_flags,
			&inptr, &outptr, sti->glob_cfg);
		spin_unlock_irqrestore(&sti->lock, flags);
	} while (ret == 1);
}

static const struct sti_blkmv_flags default_blkmv_flags = {
	wait:	STI_WAIT, 
};

void
sti_bmove(struct sti_struct *sti, int src_y, int src_x,
	  int dst_y, int dst_x, int height, int width)
{
	struct sti_blkmv_inptr inptr = {
		0, 0,
		src_x * sti->font_width, src_y * sti->font_height,
		dst_x * sti->font_width, dst_y * sti->font_height,
		width * sti->font_width, height* sti->font_height,
		0
	};
	struct sti_blkmv_outptr outptr = { 0, };
	s32 ret;
	unsigned long flags;

	do {
		spin_lock_irqsave(&sti->lock, flags);
		ret = STI_CALL(sti->block_move, &default_blkmv_flags,
			&inptr, &outptr, sti->glob_cfg);
		spin_unlock_irqrestore(&sti->lock, flags);
	} while (ret == 1);
}


void __init
sti_rom_copy(unsigned long base, unsigned long count, void *dest)
{
	unsigned long dest_len = count;
	unsigned long dest_start = (unsigned long) dest;

	/* this still needs to be revisited (see arch/parisc/mm/init.c:246) ! */
	while (count >= 4) {
		count -= 4;
		*(u32 *)dest = __raw_readl(base);
		base += 4;
		dest += 4;
	}
	while (count) {
		count--;
		*(u8 *)dest = __raw_readb(base);
		base++;
		dest++;
	}

	sti_flush(dest_start, dest_len); /* XXX */
}




static char default_sti_path[21];

static int __init 
sti_setup(char *str)
{
	if (str)
		strncpy (default_sti_path, str, sizeof (default_sti_path));
	
	return 0;
}

/*	Assuming the machine has multiple STI consoles (=graphic cards) which
 *	all get detected by sticon, the user may define with the linux kernel
 *	parameter sti=<x> which of them will be the initial boot-console.
 *	<x> is a number between 0 and MAX_STI_ROMS, with 0 as the default 
 *	STI screen.
 */
__setup("sti=", sti_setup);



static char __initdata	*font_name[MAX_STI_ROMS] = { "VGA8x16", };
static int __initdata	font_index[MAX_STI_ROMS], 
			font_height[MAX_STI_ROMS],
			font_width[MAX_STI_ROMS];

static int __init sti_font_setup(char *str)
{
	char *x;
	int i = 0;

	/* we accept sti_font=VGA8x16, sti_font=10x20, sti_font=10*20 
	 * or sti_font=7 style command lines. */

	while (i<MAX_STI_ROMS && str && *str) {
		if (*str>='0' && *str<='9') {
			if ((x = strchr(str, 'x')) || (x = strchr(str, '*'))) {
				font_height[i] = simple_strtoul(str, NULL, 0);
				font_width[i] = simple_strtoul(x+1, NULL, 0);
			} else {
				font_index[i] = simple_strtoul(str, NULL, 0);
			}
		} else {
			font_name[i] = str;	/* fb font name */
		}

		if ((x = strchr(str, ',')))
			*x++ = 0;
		str = x;

		i++;
	}

	return 0;
}

/*	The optional linux kernel parameter "sti_font" defines which font
 *	should be used by the sticon driver to draw characters to the screen.
 *	Possible values are:
 *	- sti_font=<fb_fontname>:
 *		<fb_fontname> is the name of one of the linux-kernel built-in 
 *		framebuffer font names (e.g. VGA8x16, SUN22x18). 
 *		This is only available if the fonts have been statically compiled 
 *		in with e.g. the CONFIG_FONT_8x16 or CONFIG_FONT_SUN12x22 options.
 *	- sti_font=<number>
 *		most STI ROMs have built-in HP specific fonts, which can be selected
 *		by giving the desired number to the sticon driver. 
 *		NOTE: This number is machine and STI ROM dependend.
 *	- sti_font=<height>x<width>  (e.g. sti_font=16x8)
 *		<height> and <width> gives hints to the height and width of the
 *		font which the user wants. The sticon driver will try to use
 *		a font with this height and width, but if no suitable font is
 *		found, sticon will use the default 8x8 font.
 */
__setup("sti_font=", sti_font_setup);


	
void __init
sti_dump_globcfg(struct sti_glob_cfg *glob_cfg, unsigned int sti_mem_request)
{
	struct sti_glob_cfg_ext *cfg;
	
	DPRINTK((KERN_INFO
		"%d text planes\n"
		"%4d x %4d screen resolution\n"
		"%4d x %4d offscreen\n"
		"%4d x %4d layout\n"
		"regions at %08x %08x %08x %08x\n"
		"regions at %08x %08x %08x %08x\n"
		"reent_lvl %d\n"
		"save_addr %08x\n",
		glob_cfg->text_planes,
		glob_cfg->onscreen_x, glob_cfg->onscreen_y,
		glob_cfg->offscreen_x, glob_cfg->offscreen_y,
		glob_cfg->total_x, glob_cfg->total_y,
		glob_cfg->region_ptrs[0], glob_cfg->region_ptrs[1],
		glob_cfg->region_ptrs[2], glob_cfg->region_ptrs[3],
		glob_cfg->region_ptrs[4], glob_cfg->region_ptrs[5],
		glob_cfg->region_ptrs[6], glob_cfg->region_ptrs[7],
		glob_cfg->reent_lvl,
		glob_cfg->save_addr));

	/* dump extended cfg */ 
	cfg = PTR_STI(glob_cfg->ext_ptr);
	DPRINTK(( KERN_INFO
		"monitor %d\n"
		"in friendly mode: %d\n"
		"power consumption %d watts\n"
		"freq ref %d\n"
		"sti_mem_addr %08x (size=%d bytes)\n",
		cfg->curr_mon,
		cfg->friendly_boot,
		cfg->power,
		cfg->freq_ref,
		cfg->sti_mem_addr, sti_mem_request));
}

void __init
sti_dump_outptr(struct sti_struct *sti)
{
	DPRINTK((KERN_INFO
		"%d bits per pixel\n"
		"%d used bits\n"
		"%d planes\n"
		"attributes %08x\n",
		 sti->outptr.bits_per_pixel,
		 sti->outptr.bits_used,
		 sti->outptr.planes,
		 sti->outptr.attributes));
}

int __init
sti_init_glob_cfg(struct sti_struct *sti,
	    unsigned long rom_address, unsigned long hpa)
{
	struct sti_glob_cfg *glob_cfg;
	struct sti_glob_cfg_ext *glob_cfg_ext;
	void *save_addr;
	void *sti_mem_addr;
	const int save_addr_size = 1024;	/* XXX */
	int i;

	if (!sti->sti_mem_request)
		sti->sti_mem_request = 256; /* STI default */

	glob_cfg = kmalloc(sizeof(*sti->glob_cfg), GFP_KERNEL);
	glob_cfg_ext = kmalloc(sizeof(*glob_cfg_ext), GFP_KERNEL);
	save_addr = kmalloc(save_addr_size, GFP_KERNEL);
	sti_mem_addr = kmalloc(sti->sti_mem_request, GFP_KERNEL);

	if (!(glob_cfg && glob_cfg_ext && save_addr && sti_mem_addr))
		return -ENOMEM;

	memset(glob_cfg, 0, sizeof(*glob_cfg));
	memset(glob_cfg_ext, 0, sizeof(*glob_cfg_ext));
	memset(save_addr, 0, save_addr_size);
	memset(sti_mem_addr, 0, sti->sti_mem_request);

	glob_cfg->ext_ptr = STI_PTR(glob_cfg_ext);
	glob_cfg->save_addr = STI_PTR(save_addr);
	for (i=0; i<8; i++) {
		unsigned long newhpa, len;
	       
		if (sti->pd) {
			unsigned char offs = sti->rm_entry[i];
				
			if (offs == 0)
				continue;
			if (offs != PCI_ROM_ADDRESS &&
			    (offs < PCI_BASE_ADDRESS_0 ||
			     offs > PCI_BASE_ADDRESS_5)) {
				printk (KERN_WARNING
					"STI pci region maping for region %d (%02x) can't be mapped\n",
					i,sti->rm_entry[i]);
				continue;
			}
			newhpa = pci_resource_start (sti->pd, (offs - PCI_BASE_ADDRESS_0) / 4);
		} else
			newhpa = (i == 0) ? rom_address : hpa;

		sti->regions_phys[i] =
			REGION_OFFSET_TO_PHYS(sti->regions[i], newhpa);
		
		/* remap virtually */
		/* FIXME: add BTLB support if btlb==1 */
		len = sti->regions[i].region_desc.length * 4096;
		
		if (len)
		   glob_cfg->region_ptrs[i] = (unsigned long) (
			sti->regions[i].region_desc.cache ?
			ioremap(sti->regions_phys[i], len) :
			ioremap_nocache(sti->regions_phys[i], len) );
		
		DPRINTK(("region #%d: phys %08lx, virt %08x, len=%lukB, "
			 "btlb=%d, sysonly=%d, cache=%d, last=%d\n",
			i, sti->regions_phys[i], glob_cfg->region_ptrs[i],
			len/1024,
			sti->regions[i].region_desc.btlb,
			sti->regions[i].region_desc.sys_only,
			sti->regions[i].region_desc.cache, 
			sti->regions[i].region_desc.last));

		/* last entry reached ? */
		if (sti->regions[i].region_desc.last)
			break;
	}

	if (++i<8 && sti->regions[i].region)
		printk(KERN_WARNING "%s: *future ptr (0x%8x) not yet supported !\n",
				__FILE__, sti->regions[i].region);

	glob_cfg_ext->sti_mem_addr = STI_PTR(sti_mem_addr);

	sti->glob_cfg = glob_cfg;
	
	return 0;
}

#ifdef CONFIG_FB
struct sti_cooked_font * __init
sti_select_fbfont( struct sti_cooked_rom *cooked_rom, char *fbfont_name )
{
	struct fbcon_font_desc *fbfont;
	unsigned int size, bpc;
	void *dest;
	struct sti_rom_font *nf;
	struct sti_cooked_font *cooked_font;
	
	if (!fbfont_name || !strlen(fbfont_name))
	    return NULL;
	fbfont = fbcon_find_font(fbfont_name);
	if (!fbfont)
	    fbfont = fbcon_get_default_font(1024,768);
	if (!fbfont)
	    return NULL;

	DPRINTK((KERN_DEBUG "selected %dx%d fb-font %s\n",
			fbfont->width, fbfont->height, fbfont->name));
			
	bpc = ((fbfont->width+7)/8) * fbfont->height; 
	size = bpc * 256;
	size += sizeof(struct sti_rom_font);

	nf = kmalloc(size, GFP_KERNEL);
	if (!nf)
	    return NULL;
	memset(nf, 0, size);

	nf->first_char = 0;
	nf->last_char = 255;
	nf->width = fbfont->width;
	nf->height = fbfont->height;
	nf->font_type = STI_FONT_HPROMAN8;
	nf->bytes_per_char = bpc;
	nf->next_font = 0;
	nf->underline_height = 1;
	nf->underline_pos = fbfont->height - nf->underline_height;

	dest = nf;
	dest += sizeof(struct sti_rom_font);
	memcpy(dest, fbfont->data, bpc*256);

	cooked_font = kmalloc(sizeof(*cooked_font), GFP_KERNEL);
	if (!cooked_font) {
	    kfree(nf);
	    return NULL;
	}
	
	cooked_font->raw = nf;
	cooked_font->next_font = NULL;

	cooked_rom->font_start = cooked_font;

	return cooked_font;
}
#else
struct sti_cooked_font * __init
sti_select_fbfont(struct sti_cooked_rom *cooked_rom, char *fbfont_name)
{