newport_con.c

S3C44B0X下的LCD （framebuffer）驱动资料与相关代码

/*
 * newport_con.c: Abscon for newport hardware
 * 
 * (C) 1998 Thomas Bogendoerfer ([e-mail])
 * (C) 1999 Ulf Carlsson ([e-mail])
 * 
 * This driver is based on sgicons.c and cons_newport.
 * 
 * Copyright (C) 1996 David S. Miller ([e-mail])
 * Copyright (C) 1997 Miguel de Icaza ([e-mail])
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/tty.h>
#include <linux/kd.h>
#include <linux/selection.h>
#include <linux/console.h>
#include <linux/console_struct.h>
#include <linux/vt_kern.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/slab.h>

#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <video/newport.h>
#define INCLUDE_LINUX_LOGO_DATA
#include <asm/linux_logo.h>

#include <video/font.h>

#define LOGO_W		80
#define LOGO_H		80

extern struct fbcon_font_desc font_vga_8x16;
extern unsigned long sgi_gfxaddr;

#define FONT_DATA ((unsigned char *)font_vga_8x16.data)

/* borrowed from fbcon.c */
#define REFCOUNT(fd)	(((int *)(fd))[-1])
#define FNTSIZE(fd)	(((int *)(fd))[-2])
#define FNTCHARCNT(fd)	(((int *)(fd))[-3])
#define FONT_EXTRA_WORDS 3

static unsigned char *font_data[MAX_NR_CONSOLES];

static struct newport_regs *npregs;

static int logo_active;
static int topscan;
static int xcurs_correction = 29;
static int newport_xsize;
static int newport_ysize;

static int newport_set_def_font(int unit, struct console_font_op *op);

#define BMASK(c) (c << 24)

#define RENDER(regs, cp) do { \
(regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
(regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
(regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
(regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
(regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
(regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
(regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
(regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
} while(0)

#define TESTVAL 0xdeadbeef
#define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)

static inline void newport_render_background(int xstart, int ystart,
					     int xend, int yend, int ci)
{
	newport_wait();
	npregs->set.wrmask = 0xffffffff;
	npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
				 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
				 | NPORT_DMODE0_STOPY);
	npregs->set.colori = ci;
	npregs->set.xystarti =
	    (xstart << 16) | ((ystart + topscan) & 0x3ff);
	npregs->go.xyendi =
	    ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
}

static inline void newport_init_cmap(void)
{
	unsigned short i;

	for (i = 0; i < 16; i++) {
		newport_bfwait();
		newport_cmap_setaddr(npregs, color_table[i]);
		newport_cmap_setrgb(npregs,
				    default_red[i],
				    default_grn[i], default_blu[i]);
	}
}

static inline void newport_show_logo(void)
{
	unsigned long i;

	for (i = 0; i < LINUX_LOGO_COLORS; i++) {
		newport_bfwait();
		newport_cmap_setaddr(npregs, i + 0x20);
		newport_cmap_setrgb(npregs,
				    linux_logo_red[i],
				    linux_logo_green[i],
				    linux_logo_blue[i]);
	}

	newport_wait();
	npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
				 NPORT_DMODE0_CHOST);

	npregs->set.xystarti = ((newport_xsize - LOGO_W) << 16) | (0);
	npregs->set.xyendi = ((newport_xsize - 1) << 16);
	newport_wait();

	for (i = 0; i < LOGO_W * LOGO_H; i++)
		npregs->go.hostrw0 = linux_logo[i] << 24;
}

static inline void newport_clear_screen(int xstart, int ystart, int xend,
					int yend, int ci)
{
	if (logo_active)
		return;

	newport_wait();
	npregs->set.wrmask = 0xffffffff;
	npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
				 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
				 | NPORT_DMODE0_STOPY);
	npregs->set.colori = ci;
	npregs->set.xystarti = (xstart << 16) | ystart;
	npregs->go.xyendi = (xend << 16) | yend;
}

static inline void newport_clear_lines(int ystart, int yend, int ci)
{
	ystart = ((ystart << 4) + topscan) & 0x3ff;
	yend = ((yend << 4) + topscan + 15) & 0x3ff;
	newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
}

void newport_reset(void)
{
	unsigned short treg;
	int i;

	newport_wait();
	treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
	newport_vc2_set(npregs, VC2_IREG_CONTROL,
			(treg | VC2_CTRL_EVIDEO));

	treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
	newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
	npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
			       NPORT_DMODE_W2 | VC2_PROTOCOL);
	for (i = 0; i < 128; i++) {
		newport_bfwait();
		if (i == 92 || i == 94)
			npregs->set.dcbdata0.byshort.s1 = 0xff00;
		else
			npregs->set.dcbdata0.byshort.s1 = 0x0000;
	}

	newport_init_cmap();

	/* turn off popup plane */
	npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
			       XM9_CRS_CONFIG | NPORT_DMODE_W1);
	npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
	npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
			       XM9_CRS_CONFIG | NPORT_DMODE_W1);
	npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;

	topscan = 0;
	npregs->cset.topscan = 0x3ff;
	npregs->cset.xywin = (4096 << 16) | 4096;

	/* Clear the screen. */
	newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
}

/*
 * calculate the actual screen size by reading
 * the video timing out of the VC2
 */
void newport_get_screensize(void)
{
	int i, cols;
	unsigned short ventry, treg;
	unsigned short linetable[128];	/* should be enough */

	ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
	newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
	npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
			       NPORT_DMODE_W2 | VC2_PROTOCOL);
	for (i = 0; i < 128; i++) {
		newport_bfwait();
		linetable[i] = npregs->set.dcbdata0.byshort.s1;
	}

	newport_xsize = newport_ysize = 0;
	for (i = 0; linetable[i + 1] && (i < sizeof(linetable)); i += 2) {
		cols = 0;
		newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
		npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
				       NPORT_DMODE_W2 | VC2_PROTOCOL);
		do {
			newport_bfwait();
			treg = npregs->set.dcbdata0.byshort.s1;
			if ((treg & 1) == 0)
				cols += (treg >> 7) & 0xfe;
			if ((treg & 0x80) == 0) {
				newport_bfwait();
				treg = npregs->set.dcbdata0.byshort.s1;
			}
		} while ((treg & 0x8000) == 0);
		if (cols) {
			if (cols > newport_xsize)
				newport_xsize = cols;
			newport_ysize += linetable[i + 1];
		}
	}
	printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
}

static void newport_get_revisions(void)
{
	unsigned int tmp;
	unsigned int board_rev;
	unsigned int rex3_rev;
	unsigned int vc2_rev;
	unsigned int cmap_rev;
	unsigned int xmap9_rev;
	unsigned int bt445_rev;
	unsigned int bitplanes;

	rex3_rev = npregs->cset.status & NPORT_STAT_VERS;

	npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
			       NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
	tmp = npregs->set.dcbdata0.bybytes.b3;
	cmap_rev = tmp & 7;
	board_rev = (tmp >> 4) & 7;
	bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;

	npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
			       NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
	tmp = npregs->set.dcbdata0.bybytes.b3;
	if ((tmp & 7) < cmap_rev)
		cmap_rev = (tmp & 7);

	vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;

	npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
			       XM9_CRS_REVISION | NPORT_DMODE_W1);
	xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;

	npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
			       BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
	npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
	npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
			       BT445_CSR_REVISION | NPORT_DMODE_W1);
	bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;

#define L(a)     (char)('A'+(a))
	printk
	    ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
	     board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
	     L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
#undef L

	if (board_rev == 3)	/* I don't know all affected revisions */
		xcurs_correction = 21;
}

/* Can't be __init, take_over_console may call it later */
static const char *newport_startup(void)
{
	int i;

	if (!sgi_gfxaddr)
		return NULL;
	npregs = (struct newport_regs *) (KSEG1 + sgi_gfxaddr);
	npregs->cset.config = NPORT_CFG_GD0;

	if (newport_wait()) {
		return NULL;
	}

	npregs->set.xstarti = TESTVAL;
	if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
		return NULL;

	for (i = 0; i < MAX_NR_CONSOLES; i++)
		font_data[i] = FONT_DATA;

	newport_reset();
	newport_get_revisions();
	newport_get_screensize();

	return "SGI Newport";
}

static void newport_init(struct vc_data *vc, int init)
{
	vc->vc_cols = newport_xsize / 8;
	vc->vc_rows = newport_ysize / 16;
	vc->vc_can_do_color = 1;
}

static void newport_deinit(struct vc_data *c)
{
	int i;

	/* free memory used by user font */
	for (i = 0; i < MAX_NR_CONSOLES; i++)
		newport_set_def_font(i, NULL);
}

static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
			  int width)
{
	int xend = ((sx + width) << 3) - 1;
	int ystart = ((sy << 4) + topscan) & 0x3ff;
	int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;

	if (logo_active)
		return;

	if (ystart < yend) {
		newport_clear_screen(sx << 3, ystart, xend, yend,
				     (vc->vc_color & 0xf0) >> 4);
	} else {
		newport_clear_screen(sx << 3, ystart, xend, 1023,
				     (vc->vc_color & 0xf0) >> 4);
		newport_clear_screen(sx << 3, 0, xend, yend,
				     (vc->vc_color & 0xf0) >> 4);
	}
}

static void newport_putc(struct vc_data *vc, int charattr, int ypos,
			 int xpos)
{
	unsigned char *p;

	p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
	charattr = (charattr >> 8) & 0xff;
	xpos <<= 3;
	ypos <<= 4;

	newport_render_background(xpos, ypos, xpos, ypos,
				  (charattr & 0xf0) >> 4);

	/* Set the color and drawing mode. */
	newport_wait();
	npregs->set.colori = charattr & 0xf;
	npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
				 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
				 NPORT_DMODE0_L32);

	/* Set coordinates for bitmap operation. */
	npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);