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linux/drivers/video/cirrusfb.c
Vlada Peric ee11940f8e cirrusfb: remove unused variables 
After commit a1d35a7a (cirrusfb: use modedb and add mode_option
parameter), these variables are no longer used, so remove them to fix
compilation warning.

Signed-off-by: Vlada Periæ <vlada.peric@gmail.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-19 18:49:59 -08:00

3168 lines
81 KiB
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/*
* drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
*
* Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
*
* Contributors (thanks, all!)
*
* David Eger:
* Overhaul for Linux 2.6
*
* Jeff Rugen:
* Major contributions; Motorola PowerStack (PPC and PCI) support,
* GD54xx, 1280x1024 mode support, change MCLK based on VCLK.
*
* Geert Uytterhoeven:
* Excellent code review.
*
* Lars Hecking:
* Amiga updates and testing.
*
* Original cirrusfb author: Frank Neumann
*
* Based on retz3fb.c and cirrusfb.c:
* Copyright (C) 1997 Jes Sorensen
* Copyright (C) 1996 Frank Neumann
*
***************************************************************
*
* Format this code with GNU indent '-kr -i8 -pcs' options.
*
* 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.
*
*/
#define CIRRUSFB_VERSION "2.0-pre2"
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <asm/pgtable.h>
#ifdef CONFIG_ZORRO
#include <linux/zorro.h>
#endif
#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif
#ifdef CONFIG_AMIGA
#include <asm/amigahw.h>
#endif
#ifdef CONFIG_PPC_PREP
#include <asm/machdep.h>
#define isPReP machine_is(prep)
#else
#define isPReP 0
#endif
#include <video/vga.h>
#include <video/cirrus.h>
/*****************************************************************
*
* debugging and utility macros
*
*/
/* enable debug output? */
/* #define CIRRUSFB_DEBUG 1 */
/* disable runtime assertions? */
/* #define CIRRUSFB_NDEBUG */
/* debug output */
#ifdef CIRRUSFB_DEBUG
#define DPRINTK(fmt, args...) \
printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
#else
#define DPRINTK(fmt, args...)
#endif
/* debugging assertions */
#ifndef CIRRUSFB_NDEBUG
#define assert(expr) \
if (!(expr)) { \
printk("Assertion failed! %s,%s,%s,line=%d\n", \
#expr, __FILE__, __func__, __LINE__); \
}
#else
#define assert(expr)
#endif
#define MB_ (1024 * 1024)
/*****************************************************************
*
* chipset information
*
*/
/* board types */
enum cirrus_board {
BT_NONE = 0,
BT_SD64,
BT_PICCOLO,
BT_PICASSO,
BT_SPECTRUM,
BT_PICASSO4, /* GD5446 */
BT_ALPINE, /* GD543x/4x */
BT_GD5480,
BT_LAGUNA, /* GD546x */
};
/*
* per-board-type information, used for enumerating and abstracting
* chip-specific information
* NOTE: MUST be in the same order as enum cirrus_board in order to
* use direct indexing on this array
* NOTE: '__initdata' cannot be used as some of this info
* is required at runtime. Maybe separate into an init-only and
* a run-time table?
*/
static const struct cirrusfb_board_info_rec {
char *name; /* ASCII name of chipset */
long maxclock[5]; /* maximum video clock */
/* for 1/4bpp, 8bpp 15/16bpp, 24bpp, 32bpp - numbers from xorg code */
bool init_sr07 : 1; /* init SR07 during init_vgachip() */
bool init_sr1f : 1; /* write SR1F during init_vgachip() */
/* construct bit 19 of screen start address */
bool scrn_start_bit19 : 1;
/* initial SR07 value, then for each mode */
unsigned char sr07;
unsigned char sr07_1bpp;
unsigned char sr07_1bpp_mux;
unsigned char sr07_8bpp;
unsigned char sr07_8bpp_mux;
unsigned char sr1f; /* SR1F VGA initial register value */
} cirrusfb_board_info[] = {
[BT_SD64] = {
.name = "CL SD64",
.maxclock = {
/* guess */
/* the SD64/P4 have a higher max. videoclock */
140000, 140000, 140000, 140000, 140000,
},
.init_sr07 = true,
.init_sr1f = true,
.scrn_start_bit19 = true,
.sr07 = 0xF0,
.sr07_1bpp = 0xF0,
.sr07_8bpp = 0xF1,
.sr1f = 0x20
},
[BT_PICCOLO] = {
.name = "CL Piccolo",
.maxclock = {
/* guess */
90000, 90000, 90000, 90000, 90000
},
.init_sr07 = true,
.init_sr1f = true,
.scrn_start_bit19 = false,
.sr07 = 0x80,
.sr07_1bpp = 0x80,
.sr07_8bpp = 0x81,
.sr1f = 0x22
},
[BT_PICASSO] = {
.name = "CL Picasso",
.maxclock = {
/* guess */
90000, 90000, 90000, 90000, 90000
},
.init_sr07 = true,
.init_sr1f = true,
.scrn_start_bit19 = false,
.sr07 = 0x20,
.sr07_1bpp = 0x20,
.sr07_8bpp = 0x21,
.sr1f = 0x22
},
[BT_SPECTRUM] = {
.name = "CL Spectrum",
.maxclock = {
/* guess */
90000, 90000, 90000, 90000, 90000
},
.init_sr07 = true,
.init_sr1f = true,
.scrn_start_bit19 = false,
.sr07 = 0x80,
.sr07_1bpp = 0x80,
.sr07_8bpp = 0x81,
.sr1f = 0x22
},
[BT_PICASSO4] = {
.name = "CL Picasso4",
.maxclock = {
135100, 135100, 85500, 85500, 0
},
.init_sr07 = true,
.init_sr1f = false,
.scrn_start_bit19 = true,
.sr07 = 0x20,
.sr07_1bpp = 0x20,
.sr07_8bpp = 0x21,
.sr1f = 0
},
[BT_ALPINE] = {
.name = "CL Alpine",
.maxclock = {
/* for the GD5430. GD5446 can do more... */
85500, 85500, 50000, 28500, 0
},
.init_sr07 = true,
.init_sr1f = true,
.scrn_start_bit19 = true,
.sr07 = 0xA0,
.sr07_1bpp = 0xA1,
.sr07_1bpp_mux = 0xA7,
.sr07_8bpp = 0xA1,
.sr07_8bpp_mux = 0xA7,
.sr1f = 0x1C
},
[BT_GD5480] = {
.name = "CL GD5480",
.maxclock = {
135100, 200000, 200000, 135100, 135100
},
.init_sr07 = true,
.init_sr1f = true,
.scrn_start_bit19 = true,
.sr07 = 0x10,
.sr07_1bpp = 0x11,
.sr07_8bpp = 0x11,
.sr1f = 0x1C
},
[BT_LAGUNA] = {
.name = "CL Laguna",
.maxclock = {
/* guess */
135100, 135100, 135100, 135100, 135100,
},
.init_sr07 = false,
.init_sr1f = false,
.scrn_start_bit19 = true,
}
};
#ifdef CONFIG_PCI
#define CHIP(id, btype) \
{ PCI_VENDOR_ID_CIRRUS, id, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (btype) }
static struct pci_device_id cirrusfb_pci_table[] = {
CHIP(PCI_DEVICE_ID_CIRRUS_5436, BT_ALPINE),
CHIP(PCI_DEVICE_ID_CIRRUS_5434_8, BT_ALPINE),
CHIP(PCI_DEVICE_ID_CIRRUS_5434_4, BT_ALPINE),
CHIP(PCI_DEVICE_ID_CIRRUS_5430, BT_ALPINE), /* GD-5440 is same id */
CHIP(PCI_DEVICE_ID_CIRRUS_7543, BT_ALPINE),
CHIP(PCI_DEVICE_ID_CIRRUS_7548, BT_ALPINE),
CHIP(PCI_DEVICE_ID_CIRRUS_5480, BT_GD5480), /* MacPicasso likely */
CHIP(PCI_DEVICE_ID_CIRRUS_5446, BT_PICASSO4), /* Picasso 4 is 5446 */
CHIP(PCI_DEVICE_ID_CIRRUS_5462, BT_LAGUNA), /* CL Laguna */
CHIP(PCI_DEVICE_ID_CIRRUS_5464, BT_LAGUNA), /* CL Laguna 3D */
CHIP(PCI_DEVICE_ID_CIRRUS_5465, BT_LAGUNA), /* CL Laguna 3DA*/
{ 0, }
};
MODULE_DEVICE_TABLE(pci, cirrusfb_pci_table);
#undef CHIP
#endif /* CONFIG_PCI */
#ifdef CONFIG_ZORRO
static const struct zorro_device_id cirrusfb_zorro_table[] = {
{
.id = ZORRO_PROD_HELFRICH_SD64_RAM,
.driver_data = BT_SD64,
}, {
.id = ZORRO_PROD_HELFRICH_PICCOLO_RAM,
.driver_data = BT_PICCOLO,
}, {
.id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_RAM,
.driver_data = BT_PICASSO,
}, {
.id = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_RAM,
.driver_data = BT_SPECTRUM,
}, {
.id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z3,
.driver_data = BT_PICASSO4,
},
{ 0 }
};
static const struct {
zorro_id id2;
unsigned long size;
} cirrusfb_zorro_table2[] = {
[BT_SD64] = {
.id2 = ZORRO_PROD_HELFRICH_SD64_REG,
.size = 0x400000
},
[BT_PICCOLO] = {
.id2 = ZORRO_PROD_HELFRICH_PICCOLO_REG,
.size = 0x200000
},
[BT_PICASSO] = {
.id2 = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_REG,
.size = 0x200000
},
[BT_SPECTRUM] = {
.id2 = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_REG,
.size = 0x200000
},
[BT_PICASSO4] = {
.id2 = 0,
.size = 0x400000
}
};
#endif /* CONFIG_ZORRO */
struct cirrusfb_regs {
int multiplexing;
};
#ifdef CIRRUSFB_DEBUG
enum cirrusfb_dbg_reg_class {
CRT,
SEQ
};
#endif /* CIRRUSFB_DEBUG */
/* info about board */
struct cirrusfb_info {
u8 __iomem *regbase;
enum cirrus_board btype;
unsigned char SFR; /* Shadow of special function register */
struct cirrusfb_regs currentmode;
int blank_mode;
u32 pseudo_palette[16];
void (*unmap)(struct fb_info *info);
};
static int noaccel __devinitdata;
static char *mode_option __devinitdata = "640x480@60";
/****************************************************************************/
/**** BEGIN PROTOTYPES ******************************************************/
/*--- Interface used by the world ------------------------------------------*/
static int cirrusfb_init(void);
#ifndef MODULE
static int cirrusfb_setup(char *options);
#endif
static int cirrusfb_open(struct fb_info *info, int user);
static int cirrusfb_release(struct fb_info *info, int user);
static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info);
static int cirrusfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info);
static int cirrusfb_set_par(struct fb_info *info);
static int cirrusfb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info);
static int cirrusfb_blank(int blank_mode, struct fb_info *info);
static void cirrusfb_fillrect(struct fb_info *info,
const struct fb_fillrect *region);
static void cirrusfb_copyarea(struct fb_info *info,
const struct fb_copyarea *area);
static void cirrusfb_imageblit(struct fb_info *info,
const struct fb_image *image);
/* function table of the above functions */
static struct fb_ops cirrusfb_ops = {
.owner = THIS_MODULE,
.fb_open = cirrusfb_open,
.fb_release = cirrusfb_release,
.fb_setcolreg = cirrusfb_setcolreg,
.fb_check_var = cirrusfb_check_var,
.fb_set_par = cirrusfb_set_par,
.fb_pan_display = cirrusfb_pan_display,
.fb_blank = cirrusfb_blank,
.fb_fillrect = cirrusfb_fillrect,
.fb_copyarea = cirrusfb_copyarea,
.fb_imageblit = cirrusfb_imageblit,
};
/*--- Internal routines ----------------------------------------------------*/
static void init_vgachip(struct fb_info *info);
static void switch_monitor(struct cirrusfb_info *cinfo, int on);
static void WGen(const struct cirrusfb_info *cinfo,
int regnum, unsigned char val);
static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum);
static void AttrOn(const struct cirrusfb_info *cinfo);
static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val);
static void WSFR(struct cirrusfb_info *cinfo, unsigned char val);
static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val);
static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum,
unsigned char red, unsigned char green, unsigned char blue);
#if 0
static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum,
unsigned char *red, unsigned char *green,
unsigned char *blue);
#endif
static void cirrusfb_WaitBLT(u8 __iomem *regbase);
static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel,
u_short curx, u_short cury,
u_short destx, u_short desty,
u_short width, u_short height,
u_short line_length);
static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
u_short x, u_short y,
u_short width, u_short height,
u_char color, u_short line_length);
static void bestclock(long freq, int *nom, int *den, int *div);
#ifdef CIRRUSFB_DEBUG
static void cirrusfb_dump(void);
static void cirrusfb_dbg_reg_dump(caddr_t regbase);
static void cirrusfb_dbg_print_regs(caddr_t regbase,
enum cirrusfb_dbg_reg_class reg_class, ...);
static void cirrusfb_dbg_print_byte(const char *name, unsigned char val);
#endif /* CIRRUSFB_DEBUG */
/*** END PROTOTYPES ********************************************************/
/*****************************************************************************/
/*** BEGIN Interface Used by the World ***************************************/
static int opencount;
/*--- Open /dev/fbx ---------------------------------------------------------*/
static int cirrusfb_open(struct fb_info *info, int user)
{
if (opencount++ == 0)
switch_monitor(info->par, 1);
return 0;
}
/*--- Close /dev/fbx --------------------------------------------------------*/
static int cirrusfb_release(struct fb_info *info, int user)
{
if (--opencount == 0)
switch_monitor(info->par, 0);
return 0;
}
/**** END Interface used by the World *************************************/
/****************************************************************************/
/**** BEGIN Hardware specific Routines **************************************/
/* Check if the MCLK is not a better clock source */
static int cirrusfb_check_mclk(struct cirrusfb_info *cinfo, long freq)
{
long mclk = vga_rseq(cinfo->regbase, CL_SEQR1F) & 0x3f;
/* Read MCLK value */
mclk = (14318 * mclk) >> 3;
DPRINTK("Read MCLK of %ld kHz\n", mclk);
/* Determine if we should use MCLK instead of VCLK, and if so, what we
* should divide it by to get VCLK
*/
if (abs(freq - mclk) < 250) {
DPRINTK("Using VCLK = MCLK\n");
return 1;
} else if (abs(freq - (mclk / 2)) < 250) {
DPRINTK("Using VCLK = MCLK/2\n");
return 2;
}
return 0;
}
static int cirrusfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
int yres;
/* memory size in pixels */
unsigned pixels = info->screen_size * 8 / var->bits_per_pixel;
switch (var->bits_per_pixel) {
case 1:
pixels /= 4;
break; /* 8 pixel per byte, only 1/4th of mem usable */
case 8:
case 16:
case 32:
break; /* 1 pixel == 1 byte */
default:
printk(KERN_ERR "cirrusfb: mode %dx%dx%d rejected..."
"color depth not supported.\n",
var->xres, var->yres, var->bits_per_pixel);
DPRINTK("EXIT - EINVAL error\n");
return -EINVAL;
}
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
/* use highest possible virtual resolution */
if (var->yres_virtual == -1) {
var->yres_virtual = pixels / var->xres_virtual;
printk(KERN_INFO "cirrusfb: virtual resolution set to "
"maximum of %dx%d\n", var->xres_virtual,
var->yres_virtual);
}
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
if (var->xres_virtual * var->yres_virtual > pixels) {
printk(KERN_ERR "cirrusfb: mode %dx%dx%d rejected... "
"virtual resolution too high to fit into video memory!\n",
var->xres_virtual, var->yres_virtual,
var->bits_per_pixel);
DPRINTK("EXIT - EINVAL error\n");
return -EINVAL;
}
if (var->xoffset < 0)
var->xoffset = 0;
if (var->yoffset < 0)
var->yoffset = 0;
/* truncate xoffset and yoffset to maximum if too high */
if (var->xoffset > var->xres_virtual - var->xres)
var->xoffset = var->xres_virtual - var->xres - 1;
if (var->yoffset > var->yres_virtual - var->yres)
var->yoffset = var->yres_virtual - var->yres - 1;
switch (var->bits_per_pixel) {
case 1:
var->red.offset = 0;
var->red.length = 1;
var->green = var->red;
var->blue = var->red;
break;
case 8:
var->red.offset = 0;
var->red.length = 6;
var->green = var->red;
var->blue = var->red;
break;
case 16:
if (isPReP) {
var->red.offset = 2;
var->green.offset = -3;
var->blue.offset = 8;
} else {
var->red.offset = 10;
var->green.offset = 5;
var->blue.offset = 0;
}
var->red.length = 5;
var->green.length = 5;
var->blue.length = 5;
break;
case 32:
if (isPReP) {
var->red.offset = 8;
var->green.offset = 16;
var->blue.offset = 24;
} else {
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
}
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
break;
default:
DPRINTK("Unsupported bpp size: %d\n", var->bits_per_pixel);
assert(false);
/* should never occur */
break;
}
var->red.msb_right =
var->green.msb_right =
var->blue.msb_right =
var->transp.offset =
var->transp.length =
var->transp.msb_right = 0;
yres = var->yres;
if (var->vmode & FB_VMODE_DOUBLE)
yres *= 2;
else if (var->vmode & FB_VMODE_INTERLACED)
yres = (yres + 1) / 2;
if (yres >= 1280) {
printk(KERN_ERR "cirrusfb: ERROR: VerticalTotal >= 1280; "
"special treatment required! (TODO)\n");
DPRINTK("EXIT - EINVAL error\n");
return -EINVAL;
}
return 0;
}
static int cirrusfb_decode_var(const struct fb_var_screeninfo *var,
struct cirrusfb_regs *regs,
struct fb_info *info)
{
long freq;
long maxclock;
int maxclockidx = var->bits_per_pixel >> 3;
struct cirrusfb_info *cinfo = info->par;
switch (var->bits_per_pixel) {
case 1:
info->fix.line_length = var->xres_virtual / 8;
info->fix.visual = FB_VISUAL_MONO10;
break;
case 8:
info->fix.line_length = var->xres_virtual;
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
break;
case 16:
case 32:
info->fix.line_length = var->xres_virtual * maxclockidx;
info->fix.visual = FB_VISUAL_TRUECOLOR;
break;
default:
DPRINTK("Unsupported bpp size: %d\n", var->bits_per_pixel);
assert(false);
/* should never occur */
break;
}
info->fix.type = FB_TYPE_PACKED_PIXELS;
/* convert from ps to kHz */
freq = PICOS2KHZ(var->pixclock);
DPRINTK("desired pixclock: %ld kHz\n", freq);
maxclock = cirrusfb_board_info[cinfo->btype].maxclock[maxclockidx];
regs->multiplexing = 0;
/* If the frequency is greater than we can support, we might be able
* to use multiplexing for the video mode */
if (freq > maxclock) {
switch (cinfo->btype) {
case BT_ALPINE:
case BT_GD5480:
regs->multiplexing = 1;
break;
default:
printk(KERN_ERR "cirrusfb: Frequency greater "
"than maxclock (%ld kHz)\n", maxclock);
DPRINTK("EXIT - return -EINVAL\n");
return -EINVAL;
}
}
#if 0
/* TODO: If we have a 1MB 5434, we need to put ourselves in a mode where
* the VCLK is double the pixel clock. */
switch (var->bits_per_pixel) {
case 16:
case 32:
if (var->xres <= 800)
/* Xbh has this type of clock for 32-bit */
freq /= 2;
break;
}
#endif
return 0;
}
static void cirrusfb_set_mclk_as_source(const struct cirrusfb_info *cinfo,
int div)
{
unsigned char old1f, old1e;
assert(cinfo != NULL);
old1f = vga_rseq(cinfo->regbase, CL_SEQR1F) & ~0x40;
if (div) {
DPRINTK("Set %s as pixclock source.\n",
(div == 2) ? "MCLK/2" : "MCLK");
old1f |= 0x40;
old1e = vga_rseq(cinfo->regbase, CL_SEQR1E) & ~0x1;
if (div == 2)
old1e |= 1;
vga_wseq(cinfo->regbase, CL_SEQR1E, old1e);
}
vga_wseq(cinfo->regbase, CL_SEQR1F, old1f);
}
/*************************************************************************
cirrusfb_set_par_foo()
actually writes the values for a new video mode into the hardware,
**************************************************************************/
static int cirrusfb_set_par_foo(struct fb_info *info)
{
struct cirrusfb_info *cinfo = info->par;
struct fb_var_screeninfo *var = &info->var;
struct cirrusfb_regs regs;
u8 __iomem *regbase = cinfo->regbase;
unsigned char tmp;
int offset = 0, err;
const struct cirrusfb_board_info_rec *bi;
int hdispend, hsyncstart, hsyncend, htotal;
int yres, vdispend, vsyncstart, vsyncend, vtotal;
long freq;
int nom, den, div;
DPRINTK("ENTER\n");
DPRINTK("Requested mode: %dx%dx%d\n",
var->xres, var->yres, var->bits_per_pixel);
DPRINTK("pixclock: %d\n", var->pixclock);
init_vgachip(info);
err = cirrusfb_decode_var(var, &regs, info);
if (err) {
/* should never happen */
DPRINTK("mode change aborted. invalid var.\n");
return -EINVAL;
}
bi = &cirrusfb_board_info[cinfo->btype];
hsyncstart = var->xres + var->right_margin;
hsyncend = hsyncstart + var->hsync_len;
htotal = (hsyncend + var->left_margin) / 8 - 5;
hdispend = var->xres / 8 - 1;
hsyncstart = hsyncstart / 8 + 1;
hsyncend = hsyncend / 8 + 1;
yres = var->yres;
vsyncstart = yres + var->lower_margin;
vsyncend = vsyncstart + var->vsync_len;
vtotal = vsyncend + var->upper_margin;
vdispend = yres - 1;
if (var->vmode & FB_VMODE_DOUBLE) {
yres *= 2;
vsyncstart *= 2;
vsyncend *= 2;
vtotal *= 2;
} else if (var->vmode & FB_VMODE_INTERLACED) {
yres = (yres + 1) / 2;
vsyncstart = (vsyncstart + 1) / 2;
vsyncend = (vsyncend + 1) / 2;
vtotal = (vtotal + 1) / 2;
}
vtotal -= 2;
vsyncstart -= 1;
vsyncend -= 1;
if (yres >= 1024) {
vtotal /= 2;
vsyncstart /= 2;
vsyncend /= 2;
vdispend /= 2;
}
if (regs.multiplexing) {
htotal /= 2;
hsyncstart /= 2;
hsyncend /= 2;
hdispend /= 2;
}
/* unlock register VGA_CRTC_H_TOTAL..CRT7 */
vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20); /* previously: 0x00) */
/* if debugging is enabled, all parameters get output before writing */
DPRINTK("CRT0: %d\n", htotal);
vga_wcrt(regbase, VGA_CRTC_H_TOTAL, htotal);
DPRINTK("CRT1: %d\n", hdispend);
vga_wcrt(regbase, VGA_CRTC_H_DISP, hdispend);
DPRINTK("CRT2: %d\n", var->xres / 8);
vga_wcrt(regbase, VGA_CRTC_H_BLANK_START, var->xres / 8);
/* + 128: Compatible read */
DPRINTK("CRT3: 128+%d\n", (htotal + 5) % 32);
vga_wcrt(regbase, VGA_CRTC_H_BLANK_END,
128 + ((htotal + 5) % 32));
DPRINTK("CRT4: %d\n", hsyncstart);
vga_wcrt(regbase, VGA_CRTC_H_SYNC_START, hsyncstart);
tmp = hsyncend % 32;
if ((htotal + 5) & 32)
tmp += 128;
DPRINTK("CRT5: %d\n", tmp);
vga_wcrt(regbase, VGA_CRTC_H_SYNC_END, tmp);
DPRINTK("CRT6: %d\n", vtotal & 0xff);
vga_wcrt(regbase, VGA_CRTC_V_TOTAL, vtotal & 0xff);
tmp = 16; /* LineCompare bit #9 */
if (vtotal & 256)
tmp |= 1;
if (vdispend & 256)
tmp |= 2;
if (vsyncstart & 256)
tmp |= 4;
if ((vdispend + 1) & 256)
tmp |= 8;
if (vtotal & 512)
tmp |= 32;
if (vdispend & 512)
tmp |= 64;
if (vsyncstart & 512)
tmp |= 128;
DPRINTK("CRT7: %d\n", tmp);
vga_wcrt(regbase, VGA_CRTC_OVERFLOW, tmp);
tmp = 0x40; /* LineCompare bit #8 */
if ((vdispend + 1) & 512)
tmp |= 0x20;
if (var->vmode & FB_VMODE_DOUBLE)
tmp |= 0x80;
DPRINTK("CRT9: %d\n", tmp);
vga_wcrt(regbase, VGA_CRTC_MAX_SCAN, tmp);
DPRINTK("CRT10: %d\n", vsyncstart & 0xff);
vga_wcrt(regbase, VGA_CRTC_V_SYNC_START, vsyncstart & 0xff);
DPRINTK("CRT11: 64+32+%d\n", vsyncend % 16);
vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, vsyncend % 16 + 64 + 32);
DPRINTK("CRT12: %d\n", vdispend & 0xff);
vga_wcrt(regbase, VGA_CRTC_V_DISP_END, vdispend & 0xff);
DPRINTK("CRT15: %d\n", (vdispend + 1) & 0xff);
vga_wcrt(regbase, VGA_CRTC_V_BLANK_START, (vdispend + 1) & 0xff);
DPRINTK("CRT16: %d\n", vtotal & 0xff);
vga_wcrt(regbase, VGA_CRTC_V_BLANK_END, vtotal & 0xff);
DPRINTK("CRT18: 0xff\n");
vga_wcrt(regbase, VGA_CRTC_LINE_COMPARE, 0xff);
tmp = 0;
if (var->vmode & FB_VMODE_INTERLACED)
tmp |= 1;
if ((htotal + 5) & 64)
tmp |= 16;
if ((htotal + 5) & 128)
tmp |= 32;
if (vtotal & 256)
tmp |= 64;
if (vtotal & 512)
tmp |= 128;
DPRINTK("CRT1a: %d\n", tmp);
vga_wcrt(regbase, CL_CRT1A, tmp);
freq = PICOS2KHZ(var->pixclock);
bestclock(freq, &nom, &den, &div);
/* set VCLK0 */
/* hardware RefClock: 14.31818 MHz */
/* formula: VClk = (OSC * N) / (D * (1+P)) */
/* Example: VClk = (14.31818 * 91) / (23 * (1+1)) = 28.325 MHz */
if (cinfo->btype == BT_ALPINE) {
/* if freq is close to mclk or mclk/2 select mclk
* as clock source
*/
int divMCLK = cirrusfb_check_mclk(cinfo, freq);
if (divMCLK) {
nom = 0;
cirrusfb_set_mclk_as_source(cinfo, divMCLK);
}
}
if (nom) {
vga_wseq(regbase, CL_SEQRB, nom);
tmp = den << 1;
if (div != 0)
tmp |= 1;
/* 6 bit denom; ONLY 5434!!! (bugged me 10 days) */
if ((cinfo->btype == BT_SD64) ||
(cinfo->btype == BT_ALPINE) ||
(cinfo->btype == BT_GD5480))
tmp |= 0x80;
DPRINTK("CL_SEQR1B: %ld\n", (long) tmp);
vga_wseq(regbase, CL_SEQR1B, tmp);
}
if (yres >= 1024)
/* 1280x1024 */
vga_wcrt(regbase, VGA_CRTC_MODE, 0xc7);
else
/* mode control: VGA_CRTC_START_HI enable, ROTATE(?), 16bit
* address wrap, no compat. */
vga_wcrt(regbase, VGA_CRTC_MODE, 0xc3);
/* HAEH? vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20);
* previously: 0x00 unlock VGA_CRTC_H_TOTAL..CRT7 */
/* don't know if it would hurt to also program this if no interlaced */
/* mode is used, but I feel better this way.. :-) */
if (var->vmode & FB_VMODE_INTERLACED)
vga_wcrt(regbase, VGA_CRTC_REGS, htotal / 2);
else
vga_wcrt(regbase, VGA_CRTC_REGS, 0x00); /* interlace control */
vga_wseq(regbase, VGA_SEQ_CHARACTER_MAP, 0);
/* adjust horizontal/vertical sync type (low/high) */
/* enable display memory & CRTC I/O address for color mode */
tmp = 0x03;
if (var->sync & FB_SYNC_HOR_HIGH_ACT)
tmp |= 0x40;
if (var->sync & FB_SYNC_VERT_HIGH_ACT)
tmp |= 0x80;
WGen(cinfo, VGA_MIS_W, tmp);
/* Screen A Preset Row-Scan register */
vga_wcrt(regbase, VGA_CRTC_PRESET_ROW, 0);
/* text cursor on and start line */
vga_wcrt(regbase, VGA_CRTC_CURSOR_START, 0);
/* text cursor end line */
vga_wcrt(regbase, VGA_CRTC_CURSOR_END, 31);
/******************************************************
*
* 1 bpp
*
*/
/* programming for different color depths */
if (var->bits_per_pixel == 1) {
DPRINTK("cirrusfb: preparing for 1 bit deep display\n");
vga_wgfx(regbase, VGA_GFX_MODE, 0); /* mode register */
/* SR07 */
switch (cinfo->btype) {
case BT_SD64:
case BT_PICCOLO:
case BT_PICASSO:
case BT_SPECTRUM:
case BT_PICASSO4:
case BT_ALPINE:
case BT_GD5480:
DPRINTK(" (for GD54xx)\n");
vga_wseq(regbase, CL_SEQR7,
regs.multiplexing ?
bi->sr07_1bpp_mux : bi->sr07_1bpp);
break;
case BT_LAGUNA:
DPRINTK(" (for GD546x)\n");
vga_wseq(regbase, CL_SEQR7,
vga_rseq(regbase, CL_SEQR7) & ~0x01);
break;
default:
printk(KERN_WARNING "cirrusfb: unknown Board\n");
break;
}
/* Extended Sequencer Mode */
switch (cinfo->btype) {
case BT_SD64:
/* setting the SEQRF on SD64 is not necessary
* (only during init)
*/
DPRINTK("(for SD64)\n");
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x1a);
break;
case BT_PICCOLO:
case BT_SPECTRUM:
DPRINTK("(for Piccolo/Spectrum)\n");
/* ### ueberall 0x22? */
/* ##vorher 1c MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
/* evtl d0 bei 1 bit? avoid FIFO underruns..? */
vga_wseq(regbase, CL_SEQRF, 0xb0);
break;
case BT_PICASSO:
DPRINTK("(for Picasso)\n");
/* ##vorher 22 MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
/* ## vorher d0 avoid FIFO underruns..? */
vga_wseq(regbase, CL_SEQRF, 0xd0);
break;
case BT_PICASSO4:
case BT_ALPINE:
case BT_GD5480:
case BT_LAGUNA:
DPRINTK(" (for GD54xx)\n");
/* do nothing */
break;
default:
printk(KERN_WARNING "cirrusfb: unknown Board\n");
break;
}
/* pixel mask: pass-through for first plane */
WGen(cinfo, VGA_PEL_MSK, 0x01);
if (regs.multiplexing)
/* hidden dac reg: 1280x1024 */
WHDR(cinfo, 0x4a);
else
/* hidden dac: nothing */
WHDR(cinfo, 0);
/* memory mode: odd/even, ext. memory */
vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x06);
/* plane mask: only write to first plane */
vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0x01);
offset = var->xres_virtual / 16;
}
/******************************************************
*
* 8 bpp
*
*/
else if (var->bits_per_pixel == 8) {
DPRINTK("cirrusfb: preparing for 8 bit deep display\n");
switch (cinfo->btype) {
case BT_SD64:
case BT_PICCOLO:
case BT_PICASSO:
case BT_SPECTRUM:
case BT_PICASSO4:
case BT_ALPINE:
case BT_GD5480:
DPRINTK(" (for GD54xx)\n");
vga_wseq(regbase, CL_SEQR7,
regs.multiplexing ?
bi->sr07_8bpp_mux : bi->sr07_8bpp);
break;
case BT_LAGUNA:
DPRINTK(" (for GD546x)\n");
vga_wseq(regbase, CL_SEQR7,
vga_rseq(regbase, CL_SEQR7) | 0x01);
break;
default:
printk(KERN_WARNING "cirrusfb: unknown Board\n");
break;
}
switch (cinfo->btype) {
case BT_SD64:
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x1d);
break;
case BT_PICCOLO:
case BT_PICASSO:
case BT_SPECTRUM:
/* ### vorher 1c MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
/* Fast Page-Mode writes */
vga_wseq(regbase, CL_SEQRF, 0xb0);
break;
case BT_PICASSO4:
#ifdef CONFIG_ZORRO
/* ### INCOMPLETE!! */
vga_wseq(regbase, CL_SEQRF, 0xb8);
#endif
/* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
break;
case BT_ALPINE:
DPRINTK(" (for GD543x)\n");
/* We already set SRF and SR1F */
break;
case BT_GD5480:
case BT_LAGUNA:
DPRINTK(" (for GD54xx)\n");
/* do nothing */
break;
default:
printk(KERN_WARNING "cirrusfb: unknown Board\n");
break;
}
/* mode register: 256 color mode */
vga_wgfx(regbase, VGA_GFX_MODE, 64);
/* pixel mask: pass-through all planes */
WGen(cinfo, VGA_PEL_MSK, 0xff);
if (regs.multiplexing)
/* hidden dac reg: 1280x1024 */
WHDR(cinfo, 0x4a);
else
/* hidden dac: nothing */
WHDR(cinfo, 0);
/* memory mode: chain4, ext. memory */
vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x0a);
/* plane mask: enable writing to all 4 planes */
vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0xff);
offset = var->xres_virtual / 8;
}
/******************************************************
*
* 16 bpp
*
*/
else if (var->bits_per_pixel == 16) {
DPRINTK("cirrusfb: preparing for 16 bit deep display\n");
switch (cinfo->btype) {
case BT_SD64:
/* Extended Sequencer Mode: 256c col. mode */
vga_wseq(regbase, CL_SEQR7, 0xf7);
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x1e);
break;
case BT_PICCOLO:
case BT_SPECTRUM:
vga_wseq(regbase, CL_SEQR7, 0x87);
/* Fast Page-Mode writes */
vga_wseq(regbase, CL_SEQRF, 0xb0);
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
break;
case BT_PICASSO:
vga_wseq(regbase, CL_SEQR7, 0x27);
/* Fast Page-Mode writes */
vga_wseq(regbase, CL_SEQRF, 0xb0);
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
break;
case BT_PICASSO4:
vga_wseq(regbase, CL_SEQR7, 0x27);
/* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
break;
case BT_ALPINE:
DPRINTK(" (for GD543x)\n");
vga_wseq(regbase, CL_SEQR7, 0xa7);
break;
case BT_GD5480:
DPRINTK(" (for GD5480)\n");
vga_wseq(regbase, CL_SEQR7, 0x17);
/* We already set SRF and SR1F */
break;
case BT_LAGUNA:
DPRINTK(" (for GD546x)\n");
vga_wseq(regbase, CL_SEQR7,
vga_rseq(regbase, CL_SEQR7) & ~0x01);
break;
default:
printk(KERN_WARNING "CIRRUSFB: unknown Board\n");
break;
}
/* mode register: 256 color mode */
vga_wgfx(regbase, VGA_GFX_MODE, 64);
/* pixel mask: pass-through all planes */
WGen(cinfo, VGA_PEL_MSK, 0xff);
#ifdef CONFIG_PCI
WHDR(cinfo, 0xc0); /* Copy Xbh */
#elif defined(CONFIG_ZORRO)
/* FIXME: CONFIG_PCI and CONFIG_ZORRO may be defined both */
WHDR(cinfo, 0xa0); /* hidden dac reg: nothing special */
#endif
/* memory mode: chain4, ext. memory */
vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x0a);
/* plane mask: enable writing to all 4 planes */
vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0xff);
offset = var->xres_virtual / 4;
}
/******************************************************
*
* 32 bpp
*
*/
else if (var->bits_per_pixel == 32) {
DPRINTK("cirrusfb: preparing for 32 bit deep display\n");
switch (cinfo->btype) {
case BT_SD64:
/* Extended Sequencer Mode: 256c col. mode */
vga_wseq(regbase, CL_SEQR7, 0xf9);
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x1e);
break;
case BT_PICCOLO:
case BT_SPECTRUM:
vga_wseq(regbase, CL_SEQR7, 0x85);
/* Fast Page-Mode writes */
vga_wseq(regbase, CL_SEQRF, 0xb0);
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
break;
case BT_PICASSO:
vga_wseq(regbase, CL_SEQR7, 0x25);
/* Fast Page-Mode writes */
vga_wseq(regbase, CL_SEQRF, 0xb0);
/* MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
break;
case BT_PICASSO4:
vga_wseq(regbase, CL_SEQR7, 0x25);
/* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
break;
case BT_ALPINE:
DPRINTK(" (for GD543x)\n");
vga_wseq(regbase, CL_SEQR7, 0xa9);
break;
case BT_GD5480:
DPRINTK(" (for GD5480)\n");
vga_wseq(regbase, CL_SEQR7, 0x19);
/* We already set SRF and SR1F */
break;
case BT_LAGUNA:
DPRINTK(" (for GD546x)\n");
vga_wseq(regbase, CL_SEQR7,
vga_rseq(regbase, CL_SEQR7) & ~0x01);
break;
default:
printk(KERN_WARNING "cirrusfb: unknown Board\n");
break;
}
/* mode register: 256 color mode */
vga_wgfx(regbase, VGA_GFX_MODE, 64);
/* pixel mask: pass-through all planes */
WGen(cinfo, VGA_PEL_MSK, 0xff);
/* hidden dac reg: 8-8-8 mode (24 or 32) */
WHDR(cinfo, 0xc5);
/* memory mode: chain4, ext. memory */
vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x0a);
/* plane mask: enable writing to all 4 planes */
vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0xff);
offset = var->xres_virtual / 4;
}
/******************************************************
*
* unknown/unsupported bpp
*
*/
else
printk(KERN_ERR "cirrusfb: What's this?? "
" requested color depth == %d.\n",
var->bits_per_pixel);
vga_wcrt(regbase, VGA_CRTC_OFFSET, offset & 0xff);
tmp = 0x22;
if (offset & 0x100)
tmp |= 0x10; /* offset overflow bit */
/* screen start addr #16-18, fastpagemode cycles */
vga_wcrt(regbase, CL_CRT1B, tmp);
if (cinfo->btype == BT_SD64 ||
cinfo->btype == BT_PICASSO4 ||
cinfo->btype == BT_ALPINE ||
cinfo->btype == BT_GD5480)
/* screen start address bit 19 */
vga_wcrt(regbase, CL_CRT1D, 0x00);
/* text cursor location high */
vga_wcrt(regbase, VGA_CRTC_CURSOR_HI, 0);
/* text cursor location low */
vga_wcrt(regbase, VGA_CRTC_CURSOR_LO, 0);
/* underline row scanline = at very bottom */
vga_wcrt(regbase, VGA_CRTC_UNDERLINE, 0);
/* controller mode */
vga_wattr(regbase, VGA_ATC_MODE, 1);
/* overscan (border) color */
vga_wattr(regbase, VGA_ATC_OVERSCAN, 0);
/* color plane enable */
vga_wattr(regbase, VGA_ATC_PLANE_ENABLE, 15);
/* pixel panning */
vga_wattr(regbase, CL_AR33, 0);
/* color select */
vga_wattr(regbase, VGA_ATC_COLOR_PAGE, 0);
/* [ EGS: SetOffset(); ] */
/* From SetOffset(): Turn on VideoEnable bit in Attribute controller */
AttrOn(cinfo);
/* set/reset register */
vga_wgfx(regbase, VGA_GFX_SR_VALUE, 0);
/* set/reset enable */
vga_wgfx(regbase, VGA_GFX_SR_ENABLE, 0);
/* color compare */
vga_wgfx(regbase, VGA_GFX_COMPARE_VALUE, 0);
/* data rotate */
vga_wgfx(regbase, VGA_GFX_DATA_ROTATE, 0);
/* read map select */
vga_wgfx(regbase, VGA_GFX_PLANE_READ, 0);
/* miscellaneous register */
vga_wgfx(regbase, VGA_GFX_MISC, 1);
/* color don't care */
vga_wgfx(regbase, VGA_GFX_COMPARE_MASK, 15);
/* bit mask */
vga_wgfx(regbase, VGA_GFX_BIT_MASK, 255);
/* graphics cursor attributes: nothing special */
vga_wseq(regbase, CL_SEQR12, 0x0);
/* finally, turn on everything - turn off "FullBandwidth" bit */
/* also, set "DotClock%2" bit where requested */
tmp = 0x01;
/*** FB_VMODE_CLOCK_HALVE in linux/fb.h not defined anymore ?
if (var->vmode & FB_VMODE_CLOCK_HALVE)
tmp |= 0x08;
*/
vga_wseq(regbase, VGA_SEQ_CLOCK_MODE, tmp);
DPRINTK("CL_SEQR1: %d\n", tmp);
cinfo->currentmode = regs;
/* pan to requested offset */
cirrusfb_pan_display(var, info);
#ifdef CIRRUSFB_DEBUG
cirrusfb_dump();
#endif
DPRINTK("EXIT\n");
return 0;
}
/* for some reason incomprehensible to me, cirrusfb requires that you write
* the registers twice for the settings to take..grr. -dte */
static int cirrusfb_set_par(struct fb_info *info)
{
cirrusfb_set_par_foo(info);
return cirrusfb_set_par_foo(info);
}
static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct cirrusfb_info *cinfo = info->par;
if (regno > 255)
return -EINVAL;
if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
u32 v;
red >>= (16 - info->var.red.length);
green >>= (16 - info->var.green.length);
blue >>= (16 - info->var.blue.length);
if (regno >= 16)
return 1;
v = (red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset);
cinfo->pseudo_palette[regno] = v;
return 0;
}
if (info->var.bits_per_pixel == 8)
WClut(cinfo, regno, red >> 10, green >> 10, blue >> 10);
return 0;
}
/*************************************************************************
cirrusfb_pan_display()
performs display panning - provided hardware permits this
**************************************************************************/
static int cirrusfb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
int xoffset = 0;
int yoffset = 0;
unsigned long base;
unsigned char tmp = 0, tmp2 = 0, xpix;
struct cirrusfb_info *cinfo = info->par;
DPRINTK("ENTER\n");
DPRINTK("virtual offset: (%d,%d)\n", var->xoffset, var->yoffset);
/* no range checks for xoffset and yoffset, */
/* as fb_pan_display has already done this */
if (var->vmode & FB_VMODE_YWRAP)
return -EINVAL;
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
xoffset = var->xoffset * info->var.bits_per_pixel / 8;
yoffset = var->yoffset;
base = yoffset * info->fix.line_length + xoffset;
if (info->var.bits_per_pixel == 1) {
/* base is already correct */
xpix = (unsigned char) (var->xoffset % 8);
} else {
base /= 4;
xpix = (unsigned char) ((xoffset % 4) * 2);
}
cirrusfb_WaitBLT(cinfo->regbase); /* make sure all the BLT's are done */
/* lower 8 + 8 bits of screen start address */
vga_wcrt(cinfo->regbase, VGA_CRTC_START_LO,
(unsigned char) (base & 0xff));
vga_wcrt(cinfo->regbase, VGA_CRTC_START_HI,
(unsigned char) (base >> 8));
/* construct bits 16, 17 and 18 of screen start address */
if (base & 0x10000)
tmp |= 0x01;
if (base & 0x20000)
tmp |= 0x04;
if (base & 0x40000)
tmp |= 0x08;
/* 0xf2 is %11110010, exclude tmp bits */
tmp2 = (vga_rcrt(cinfo->regbase, CL_CRT1B) & 0xf2) | tmp;
vga_wcrt(cinfo->regbase, CL_CRT1B, tmp2);
/* construct bit 19 of screen start address */
if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19)
vga_wcrt(cinfo->regbase, CL_CRT1D, (base >> 12) & 0x80);
/* write pixel panning value to AR33; this does not quite work in 8bpp
*
* ### Piccolo..? Will this work?
*/
if (info->var.bits_per_pixel == 1)
vga_wattr(cinfo->regbase, CL_AR33, xpix);
cirrusfb_WaitBLT(cinfo->regbase);
DPRINTK("EXIT\n");
return 0;
}
static int cirrusfb_blank(int blank_mode, struct fb_info *info)
{
/*
* Blank the screen if blank_mode != 0, else unblank. If blank == NULL
* then the caller blanks by setting the CLUT (Color Look Up Table)
* to all black. Return 0 if blanking succeeded, != 0 if un-/blanking
* failed due to e.g. a video mode which doesn't support it.
* Implements VESA suspend and powerdown modes on hardware that
* supports disabling hsync/vsync:
* blank_mode == 2: suspend vsync
* blank_mode == 3: suspend hsync
* blank_mode == 4: powerdown
*/
unsigned char val;
struct cirrusfb_info *cinfo = info->par;
int current_mode = cinfo->blank_mode;
DPRINTK("ENTER, blank mode = %d\n", blank_mode);
if (info->state != FBINFO_STATE_RUNNING ||
current_mode == blank_mode) {
DPRINTK("EXIT, returning 0\n");
return 0;
}
/* Undo current */
if (current_mode == FB_BLANK_NORMAL ||
current_mode == FB_BLANK_UNBLANK) {
/* unblank the screen */
val = vga_rseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE);
/* clear "FullBandwidth" bit */
vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, val & 0xdf);
/* and undo VESA suspend trickery */
vga_wgfx(cinfo->regbase, CL_GRE, 0x00);
}
/* set new */
if (blank_mode > FB_BLANK_NORMAL) {
/* blank the screen */
val = vga_rseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE);
/* set "FullBandwidth" bit */
vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, val | 0x20);
}
switch (blank_mode) {
case FB_BLANK_UNBLANK:
case FB_BLANK_NORMAL:
break;
case FB_BLANK_VSYNC_SUSPEND:
vga_wgfx(cinfo->regbase, CL_GRE, 0x04);
break;
case FB_BLANK_HSYNC_SUSPEND:
vga_wgfx(cinfo->regbase, CL_GRE, 0x02);
break;
case FB_BLANK_POWERDOWN:
vga_wgfx(cinfo->regbase, CL_GRE, 0x06);
break;
default:
DPRINTK("EXIT, returning 1\n");
return 1;
}
cinfo->blank_mode = blank_mode;
DPRINTK("EXIT, returning 0\n");
/* Let fbcon do a soft blank for us */
return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
}
/**** END Hardware specific Routines **************************************/
/****************************************************************************/
/**** BEGIN Internal Routines ***********************************************/
static void init_vgachip(struct fb_info *info)
{
struct cirrusfb_info *cinfo = info->par;
const struct cirrusfb_board_info_rec *bi;
DPRINTK("ENTER\n");
assert(cinfo != NULL);
bi = &cirrusfb_board_info[cinfo->btype];
/* reset board globally */
switch (cinfo->btype) {
case BT_PICCOLO:
WSFR(cinfo, 0x01);
udelay(500);
WSFR(cinfo, 0x51);
udelay(500);
break;
case BT_PICASSO:
WSFR2(cinfo, 0xff);
udelay(500);
break;
case BT_SD64:
case BT_SPECTRUM:
WSFR(cinfo, 0x1f);
udelay(500);
WSFR(cinfo, 0x4f);
udelay(500);
break;
case BT_PICASSO4:
/* disable flickerfixer */
vga_wcrt(cinfo->regbase, CL_CRT51, 0x00);
mdelay(100);
/* from Klaus' NetBSD driver: */
vga_wgfx(cinfo->regbase, CL_GR2F, 0x00);
/* put blitter into 542x compat */
vga_wgfx(cinfo->regbase, CL_GR33, 0x00);
/* mode */
vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
break;
case BT_GD5480:
/* from Klaus' NetBSD driver: */
vga_wgfx(cinfo->regbase, CL_GR2F, 0x00);
break;
case BT_ALPINE:
/* Nothing to do to reset the board. */
break;
default:
printk(KERN_ERR "cirrusfb: Warning: Unknown board type\n");
break;
}
/* make sure RAM size set by this point */
assert(info->screen_size > 0);
/* the P4 is not fully initialized here; I rely on it having been */
/* inited under AmigaOS already, which seems to work just fine */
/* (Klaus advised to do it this way) */
if (cinfo->btype != BT_PICASSO4) {
WGen(cinfo, CL_VSSM, 0x10); /* EGS: 0x16 */
WGen(cinfo, CL_POS102, 0x01);
WGen(cinfo, CL_VSSM, 0x08); /* EGS: 0x0e */
if (cinfo->btype != BT_SD64)
WGen(cinfo, CL_VSSM2, 0x01);
/* reset sequencer logic */
vga_wseq(cinfo->regbase, CL_SEQR0, 0x03);
/* FullBandwidth (video off) and 8/9 dot clock */
vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, 0x21);
/* polarity (-/-), disable access to display memory,
* VGA_CRTC_START_HI base address: color
*/
WGen(cinfo, VGA_MIS_W, 0xc1);
/* "magic cookie" - doesn't make any sense to me.. */
/* vga_wgfx(cinfo->regbase, CL_GRA, 0xce); */
/* unlock all extension registers */
vga_wseq(cinfo->regbase, CL_SEQR6, 0x12);
/* reset blitter */
vga_wgfx(cinfo->regbase, CL_GR31, 0x04);
switch (cinfo->btype) {
case BT_GD5480:
vga_wseq(cinfo->regbase, CL_SEQRF, 0x98);
break;
case BT_ALPINE:
break;
case BT_SD64:
vga_wseq(cinfo->regbase, CL_SEQRF, 0xb8);
break;
default:
vga_wseq(cinfo->regbase, CL_SEQR16, 0x0f);
vga_wseq(cinfo->regbase, CL_SEQRF, 0xb0);
break;
}
}
/* plane mask: nothing */
vga_wseq(cinfo->regbase, VGA_SEQ_PLANE_WRITE, 0xff);
/* character map select: doesn't even matter in gx mode */
vga_wseq(cinfo->regbase, VGA_SEQ_CHARACTER_MAP, 0x00);
/* memory mode: chain-4, no odd/even, ext. memory */
vga_wseq(cinfo->regbase, VGA_SEQ_MEMORY_MODE, 0x0e);
/* controller-internal base address of video memory */
if (bi->init_sr07)
vga_wseq(cinfo->regbase, CL_SEQR7, bi->sr07);
/* vga_wseq(cinfo->regbase, CL_SEQR8, 0x00); */
/* EEPROM control: shouldn't be necessary to write to this at all.. */
/* graphics cursor X position (incomplete; position gives rem. 3 bits */
vga_wseq(cinfo->regbase, CL_SEQR10, 0x00);
/* graphics cursor Y position (..."... ) */
vga_wseq(cinfo->regbase, CL_SEQR11, 0x00);
/* graphics cursor attributes */
vga_wseq(cinfo->regbase, CL_SEQR12, 0x00);
/* graphics cursor pattern address */
vga_wseq(cinfo->regbase, CL_SEQR13, 0x00);
/* writing these on a P4 might give problems.. */
if (cinfo->btype != BT_PICASSO4) {
/* configuration readback and ext. color */
vga_wseq(cinfo->regbase, CL_SEQR17, 0x00);
/* signature generator */
vga_wseq(cinfo->regbase, CL_SEQR18, 0x02);
}
/* MCLK select etc. */
if (bi->init_sr1f)
vga_wseq(cinfo->regbase, CL_SEQR1F, bi->sr1f);
/* Screen A preset row scan: none */
vga_wcrt(cinfo->regbase, VGA_CRTC_PRESET_ROW, 0x00);
/* Text cursor start: disable text cursor */
vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_START, 0x20);
/* Text cursor end: - */
vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_END, 0x00);
/* Screen start address high: 0 */
vga_wcrt(cinfo->regbase, VGA_CRTC_START_HI, 0x00);
/* Screen start address low: 0 */
vga_wcrt(cinfo->regbase, VGA_CRTC_START_LO, 0x00);
/* text cursor location high: 0 */
vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_HI, 0x00);
/* text cursor location low: 0 */
vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_LO, 0x00);
/* Underline Row scanline: - */
vga_wcrt(cinfo->regbase, VGA_CRTC_UNDERLINE, 0x00);
/* mode control: timing enable, byte mode, no compat modes */
vga_wcrt(cinfo->regbase, VGA_CRTC_MODE, 0xc3);
/* Line Compare: not needed */
vga_wcrt(cinfo->regbase, VGA_CRTC_LINE_COMPARE, 0x00);
/* ### add 0x40 for text modes with > 30 MHz pixclock */
/* ext. display controls: ext.adr. wrap */
vga_wcrt(cinfo->regbase, CL_CRT1B, 0x02);
/* Set/Reset registes: - */
vga_wgfx(cinfo->regbase, VGA_GFX_SR_VALUE, 0x00);
/* Set/Reset enable: - */
vga_wgfx(cinfo->regbase, VGA_GFX_SR_ENABLE, 0x00);
/* Color Compare: - */
vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_VALUE, 0x00);
/* Data Rotate: - */
vga_wgfx(cinfo->regbase, VGA_GFX_DATA_ROTATE, 0x00);
/* Read Map Select: - */
vga_wgfx(cinfo->regbase, VGA_GFX_PLANE_READ, 0x00);
/* Mode: conf. for 16/4/2 color mode, no odd/even, read/write mode 0 */
vga_wgfx(cinfo->regbase, VGA_GFX_MODE, 0x00);
/* Miscellaneous: memory map base address, graphics mode */
vga_wgfx(cinfo->regbase, VGA_GFX_MISC, 0x01);
/* Color Don't care: involve all planes */
vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_MASK, 0x0f);
/* Bit Mask: no mask at all */
vga_wgfx(cinfo->regbase, VGA_GFX_BIT_MASK, 0xff);
if (cinfo->btype == BT_ALPINE)
/* (5434 can't have bit 3 set for bitblt) */
vga_wgfx(cinfo->regbase, CL_GRB, 0x20);
else
/* Graphics controller mode extensions: finer granularity,
* 8byte data latches
*/
vga_wgfx(cinfo->regbase, CL_GRB, 0x28);
vga_wgfx(cinfo->regbase, CL_GRC, 0xff); /* Color Key compare: - */
vga_wgfx(cinfo->regbase, CL_GRD, 0x00); /* Color Key compare mask: - */
vga_wgfx(cinfo->regbase, CL_GRE, 0x00); /* Miscellaneous control: - */
/* Background color byte 1: - */
/* vga_wgfx (cinfo->regbase, CL_GR10, 0x00); */
/* vga_wgfx (cinfo->regbase, CL_GR11, 0x00); */
/* Attribute Controller palette registers: "identity mapping" */
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE0, 0x00);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE1, 0x01);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE2, 0x02);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE3, 0x03);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE4, 0x04);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE5, 0x05);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE6, 0x06);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE7, 0x07);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE8, 0x08);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTE9, 0x09);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTEA, 0x0a);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTEB, 0x0b);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTEC, 0x0c);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTED, 0x0d);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTEE, 0x0e);
vga_wattr(cinfo->regbase, VGA_ATC_PALETTEF, 0x0f);
/* Attribute Controller mode: graphics mode */
vga_wattr(cinfo->regbase, VGA_ATC_MODE, 0x01);
/* Overscan color reg.: reg. 0 */
vga_wattr(cinfo->regbase, VGA_ATC_OVERSCAN, 0x00);
/* Color Plane enable: Enable all 4 planes */
vga_wattr(cinfo->regbase, VGA_ATC_PLANE_ENABLE, 0x0f);
/* ### vga_wattr(cinfo->regbase, CL_AR33, 0x00); * Pixel Panning: - */
/* Color Select: - */
vga_wattr(cinfo->regbase, VGA_ATC_COLOR_PAGE, 0x00);
WGen(cinfo, VGA_PEL_MSK, 0xff); /* Pixel mask: no mask */
if (cinfo->btype != BT_ALPINE && cinfo->btype != BT_GD5480)
/* polarity (-/-), enable display mem,
* VGA_CRTC_START_HI i/o base = color
*/
WGen(cinfo, VGA_MIS_W, 0xc3);
/* BLT Start/status: Blitter reset */
vga_wgfx(cinfo->regbase, CL_GR31, 0x04);
/* - " - : "end-of-reset" */
vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
/* misc... */
WHDR(cinfo, 0); /* Hidden DAC register: - */
DPRINTK("EXIT\n");
return;
}
static void switch_monitor(struct cirrusfb_info *cinfo, int on)
{
#ifdef CONFIG_ZORRO /* only works on Zorro boards */
static int IsOn = 0; /* XXX not ok for multiple boards */
DPRINTK("ENTER\n");
if (cinfo->btype == BT_PICASSO4)
return; /* nothing to switch */
if (cinfo->btype == BT_ALPINE)
return; /* nothing to switch */
if (cinfo->btype == BT_GD5480)
return; /* nothing to switch */
if (cinfo->btype == BT_PICASSO) {
if ((on && !IsOn) || (!on && IsOn))
WSFR(cinfo, 0xff);
DPRINTK("EXIT\n");
return;
}
if (on) {
switch (cinfo->btype) {
case BT_SD64:
WSFR(cinfo, cinfo->SFR | 0x21);
break;
case BT_PICCOLO:
WSFR(cinfo, cinfo->SFR | 0x28);
break;
case BT_SPECTRUM:
WSFR(cinfo, 0x6f);
break;
default: /* do nothing */ break;
}
} else {
switch (cinfo->btype) {
case BT_SD64:
WSFR(cinfo, cinfo->SFR & 0xde);
break;
case BT_PICCOLO:
WSFR(cinfo, cinfo->SFR & 0xd7);
break;
case BT_SPECTRUM:
WSFR(cinfo, 0x4f);
break;
default: /* do nothing */ break;
}
}
DPRINTK("EXIT\n");
#endif /* CONFIG_ZORRO */
}
/******************************************/
/* Linux 2.6-style accelerated functions */
/******************************************/
static void cirrusfb_fillrect(struct fb_info *info,
const struct fb_fillrect *region)
{
struct fb_fillrect modded;
int vxres, vyres;
struct cirrusfb_info *cinfo = info->par;
int m = info->var.bits_per_pixel;
u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
cinfo->pseudo_palette[region->color] : region->color;
if (info->state != FBINFO_STATE_RUNNING)
return;
if (info->flags & FBINFO_HWACCEL_DISABLED) {
cfb_fillrect(info, region);
return;
}
vxres = info->var.xres_virtual;
vyres = info->var.yres_virtual;
memcpy(&modded, region, sizeof(struct fb_fillrect));
if (!modded.width || !modded.height ||
modded.dx >= vxres || modded.dy >= vyres)
return;
if (modded.dx + modded.width > vxres)
modded.width = vxres - modded.dx;
if (modded.dy + modded.height > vyres)
modded.height = vyres - modded.dy;
cirrusfb_RectFill(cinfo->regbase,
info->var.bits_per_pixel,
(region->dx * m) / 8, region->dy,
(region->width * m) / 8, region->height,
color,
info->fix.line_length);
}
static void cirrusfb_copyarea(struct fb_info *info,
const struct fb_copyarea *area)
{
struct fb_copyarea modded;
u32 vxres, vyres;
struct cirrusfb_info *cinfo = info->par;
int m = info->var.bits_per_pixel;
if (info->state != FBINFO_STATE_RUNNING)
return;
if (info->flags & FBINFO_HWACCEL_DISABLED) {
cfb_copyarea(info, area);
return;
}
vxres = info->var.xres_virtual;
vyres = info->var.yres_virtual;
memcpy(&modded, area, sizeof(struct fb_copyarea));
if (!modded.width || !modded.height ||
modded.sx >= vxres || modded.sy >= vyres ||
modded.dx >= vxres || modded.dy >= vyres)
return;
if (modded.sx + modded.width > vxres)
modded.width = vxres - modded.sx;
if (modded.dx + modded.width > vxres)
modded.width = vxres - modded.dx;
if (modded.sy + modded.height > vyres)
modded.height = vyres - modded.sy;
if (modded.dy + modded.height > vyres)
modded.height = vyres - modded.dy;
cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
(area->sx * m) / 8, area->sy,
(area->dx * m) / 8, area->dy,
(area->width * m) / 8, area->height,
info->fix.line_length);
}
static void cirrusfb_imageblit(struct fb_info *info,
const struct fb_image *image)
{
struct cirrusfb_info *cinfo = info->par;
cirrusfb_WaitBLT(cinfo->regbase);
cfb_imageblit(info, image);
}
#ifdef CONFIG_PPC_PREP
#define PREP_VIDEO_BASE ((volatile unsigned long) 0xC0000000)
#define PREP_IO_BASE ((volatile unsigned char *) 0x80000000)
static void get_prep_addrs(unsigned long *display, unsigned long *registers)
{
DPRINTK("ENTER\n");
*display = PREP_VIDEO_BASE;
*registers = (unsigned long) PREP_IO_BASE;
DPRINTK("EXIT\n");
}
#endif /* CONFIG_PPC_PREP */
#ifdef CONFIG_PCI
static int release_io_ports;
/* Pulled the logic from XFree86 Cirrus driver to get the memory size,
* based on the DRAM bandwidth bit and DRAM bank switching bit. This
* works with 1MB, 2MB and 4MB configurations (which the Motorola boards
* seem to have. */
static unsigned int __devinit cirrusfb_get_memsize(u8 __iomem *regbase)
{
unsigned long mem;
unsigned char SRF;
DPRINTK("ENTER\n");
SRF = vga_rseq(regbase, CL_SEQRF);
switch ((SRF & 0x18)) {
case 0x08:
mem = 512 * 1024;
break;
case 0x10:
mem = 1024 * 1024;
break;
/* 64-bit DRAM data bus width; assume 2MB. Also indicates 2MB memory
* on the 5430.
*/
case 0x18:
mem = 2048 * 1024;
break;
default:
printk(KERN_WARNING "CLgenfb: Unknown memory size!\n");
mem = 1024 * 1024;
}
if (SRF & 0x80)
/* If DRAM bank switching is enabled, there must be twice as much
* memory installed. (4MB on the 5434)
*/
mem *= 2;
/* TODO: Handling of GD5446/5480 (see XF86 sources ...) */
DPRINTK("EXIT\n");
return mem;
}
static void get_pci_addrs(const struct pci_dev *pdev,
unsigned long *display, unsigned long *registers)
{
assert(pdev != NULL);
assert(display != NULL);
assert(registers != NULL);
DPRINTK("ENTER\n");
*display = 0;
*registers = 0;
/* This is a best-guess for now */
if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
*display = pci_resource_start(pdev, 1);
*registers = pci_resource_start(pdev, 0);
} else {
*display = pci_resource_start(pdev, 0);
*registers = pci_resource_start(pdev, 1);
}
assert(*display != 0);
DPRINTK("EXIT\n");
}
static void cirrusfb_pci_unmap(struct fb_info *info)
{
struct pci_dev *pdev = to_pci_dev(info->device);
iounmap(info->screen_base);
#if 0 /* if system didn't claim this region, we would... */
release_mem_region(0xA0000, 65535);
#endif
if (release_io_ports)
release_region(0x3C0, 32);
pci_release_regions(pdev);
}
#endif /* CONFIG_PCI */
#ifdef CONFIG_ZORRO
static void cirrusfb_zorro_unmap(struct fb_info *info)
{
struct cirrusfb_info *cinfo = info->par;
struct zorro_dev *zdev = to_zorro_dev(info->device);
zorro_release_device(zdev);
if (cinfo->btype == BT_PICASSO4) {
cinfo->regbase -= 0x600000;
iounmap((void *)cinfo->regbase);
iounmap(info->screen_base);
} else {
if (zorro_resource_start(zdev) > 0x01000000)
iounmap(info->screen_base);
}
}
#endif /* CONFIG_ZORRO */
static int __devinit cirrusfb_set_fbinfo(struct fb_info *info)
{
struct cirrusfb_info *cinfo = info->par;
struct fb_var_screeninfo *var = &info->var;
info->pseudo_palette = cinfo->pseudo_palette;
info->flags = FBINFO_DEFAULT
| FBINFO_HWACCEL_XPAN
| FBINFO_HWACCEL_YPAN
| FBINFO_HWACCEL_FILLRECT
| FBINFO_HWACCEL_COPYAREA;
if (noaccel)
info->flags |= FBINFO_HWACCEL_DISABLED;
info->fbops = &cirrusfb_ops;
if (cinfo->btype == BT_GD5480) {
if (var->bits_per_pixel == 16)
info->screen_base += 1 * MB_;
if (var->bits_per_pixel == 32)
info->screen_base += 2 * MB_;
}
/* Fill fix common fields */
strlcpy(info->fix.id, cirrusfb_board_info[cinfo->btype].name,
sizeof(info->fix.id));
/* monochrome: only 1 memory plane */
/* 8 bit and above: Use whole memory area */
info->fix.smem_len = info->screen_size;
if (var->bits_per_pixel == 1)
info->fix.smem_len /= 4;
info->fix.type_aux = 0;
info->fix.xpanstep = 1;
info->fix.ypanstep = 1;
info->fix.ywrapstep = 0;
/* FIXME: map region at 0xB8000 if available, fill in here */
info->fix.mmio_len = 0;
info->fix.accel = FB_ACCEL_NONE;
fb_alloc_cmap(&info->cmap, 256, 0);
return 0;
}
static int __devinit cirrusfb_register(struct fb_info *info)
{
struct cirrusfb_info *cinfo = info->par;
int err;
enum cirrus_board btype;
DPRINTK("ENTER\n");
printk(KERN_INFO "cirrusfb: Driver for Cirrus Logic based "
"graphic boards, v" CIRRUSFB_VERSION "\n");
btype = cinfo->btype;
/* sanity checks */
assert(btype != BT_NONE);
/* set all the vital stuff */
cirrusfb_set_fbinfo(info);
DPRINTK("cirrusfb: (RAM start set to: 0x%p)\n", info->screen_base);
err = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8);
if (!err) {
DPRINTK("wrong initial video mode\n");
err = -EINVAL;
goto err_dealloc_cmap;
}
info->var.activate = FB_ACTIVATE_NOW;
err = cirrusfb_decode_var(&info->var, &cinfo->currentmode, info);
if (err < 0) {
/* should never happen */
DPRINTK("choking on default var... umm, no good.\n");
goto err_dealloc_cmap;
}
err = register_framebuffer(info);
if (err < 0) {
printk(KERN_ERR "cirrusfb: could not register "
"fb device; err = %d!\n", err);
goto err_dealloc_cmap;
}
DPRINTK("EXIT, returning 0\n");
return 0;
err_dealloc_cmap:
fb_dealloc_cmap(&info->cmap);
cinfo->unmap(info);
framebuffer_release(info);
return err;
}
static void __devexit cirrusfb_cleanup(struct fb_info *info)
{
struct cirrusfb_info *cinfo = info->par;
DPRINTK("ENTER\n");
switch_monitor(cinfo, 0);
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
printk("Framebuffer unregistered\n");
cinfo->unmap(info);
framebuffer_release(info);
DPRINTK("EXIT\n");
}
#ifdef CONFIG_PCI
static int __devinit cirrusfb_pci_register(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct cirrusfb_info *cinfo;
struct fb_info *info;
enum cirrus_board btype;
unsigned long board_addr, board_size;
int ret;
ret = pci_enable_device(pdev);
if (ret < 0) {
printk(KERN_ERR "cirrusfb: Cannot enable PCI device\n");
goto err_out;
}
info = framebuffer_alloc(sizeof(struct cirrusfb_info), &pdev->dev);
if (!info) {
printk(KERN_ERR "cirrusfb: could not allocate memory\n");
ret = -ENOMEM;
goto err_disable;
}
cinfo = info->par;
cinfo->btype = btype = (enum cirrus_board) ent->driver_data;
DPRINTK(" Found PCI device, base address 0 is 0x%x, btype set to %d\n",
pdev->resource[0].start, btype);
DPRINTK(" base address 1 is 0x%x\n", pdev->resource[1].start);
if (isPReP) {
pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, 0x00000000);
#ifdef CONFIG_PPC_PREP
get_prep_addrs(&board_addr, &info->fix.mmio_start);
#endif
/* PReP dies if we ioremap the IO registers, but it works w/out... */
cinfo->regbase = (char __iomem *) info->fix.mmio_start;
} else {
DPRINTK("Attempt to get PCI info for Cirrus Graphics Card\n");
get_pci_addrs(pdev, &board_addr, &info->fix.mmio_start);
/* FIXME: this forces VGA. alternatives? */
cinfo->regbase = NULL;
}
DPRINTK("Board address: 0x%lx, register address: 0x%lx\n",
board_addr, info->fix.mmio_start);
board_size = (btype == BT_GD5480) ?
32 * MB_ : cirrusfb_get_memsize(cinfo->regbase);
ret = pci_request_regions(pdev, "cirrusfb");
if (ret < 0) {
printk(KERN_ERR "cirrusfb: cannot reserve region 0x%lx, "
"abort\n",
board_addr);
goto err_release_fb;
}
#if 0 /* if the system didn't claim this region, we would... */
if (!request_mem_region(0xA0000, 65535, "cirrusfb")) {
printk(KERN_ERR "cirrusfb: cannot reserve region 0x%lx, abort\n"
,
0xA0000L);
ret = -EBUSY;
goto err_release_regions;
}
#endif
if (request_region(0x3C0, 32, "cirrusfb"))
release_io_ports = 1;
info->screen_base = ioremap(board_addr, board_size);
if (!info->screen_base) {
ret = -EIO;
goto err_release_legacy;
}
info->fix.smem_start = board_addr;
info->screen_size = board_size;
cinfo->unmap = cirrusfb_pci_unmap;
printk(KERN_INFO "RAM (%lu kB) at 0x%lx, Cirrus "
"Logic chipset on PCI bus\n",
info->screen_size >> 10, board_addr);
pci_set_drvdata(pdev, info);
ret = cirrusfb_register(info);
if (ret)
iounmap(info->screen_base);
return ret;
err_release_legacy:
if (release_io_ports)
release_region(0x3C0, 32);
#if 0
release_mem_region(0xA0000, 65535);
err_release_regions:
#endif
pci_release_regions(pdev);
err_release_fb:
framebuffer_release(info);
err_disable:
err_out:
return ret;
}
static void __devexit cirrusfb_pci_unregister(struct pci_dev *pdev)
{
struct fb_info *info = pci_get_drvdata(pdev);
DPRINTK("ENTER\n");
cirrusfb_cleanup(info);
DPRINTK("EXIT\n");
}
static struct pci_driver cirrusfb_pci_driver = {
.name = "cirrusfb",
.id_table = cirrusfb_pci_table,
.probe = cirrusfb_pci_register,
.remove = __devexit_p(cirrusfb_pci_unregister),
#ifdef CONFIG_PM
#if 0
.suspend = cirrusfb_pci_suspend,
.resume = cirrusfb_pci_resume,
#endif
#endif
};
#endif /* CONFIG_PCI */
#ifdef CONFIG_ZORRO
static int __devinit cirrusfb_zorro_register(struct zorro_dev *z,
const struct zorro_device_id *ent)
{
struct cirrusfb_info *cinfo;
struct fb_info *info;
enum cirrus_board btype;
struct zorro_dev *z2 = NULL;
unsigned long board_addr, board_size, size;
int ret;
btype = ent->driver_data;
if (cirrusfb_zorro_table2[btype].id2)
z2 = zorro_find_device(cirrusfb_zorro_table2[btype].id2, NULL);
size = cirrusfb_zorro_table2[btype].size;
printk(KERN_INFO "cirrusfb: %s board detected; ",
cirrusfb_board_info[btype].name);
info = framebuffer_alloc(sizeof(struct cirrusfb_info), &z->dev);
if (!info) {
printk(KERN_ERR "cirrusfb: could not allocate memory\n");
ret = -ENOMEM;
goto err_out;
}
cinfo = info->par;
cinfo->btype = btype;
assert(z);
assert(btype != BT_NONE);
board_addr = zorro_resource_start(z);
board_size = zorro_resource_len(z);
info->screen_size = size;
if (!zorro_request_device(z, "cirrusfb")) {
printk(KERN_ERR "cirrusfb: cannot reserve region 0x%lx, "
"abort\n",
board_addr);
ret = -EBUSY;
goto err_release_fb;
}
printk(" RAM (%lu MB) at $%lx, ", board_size / MB_, board_addr);
ret = -EIO;
if (btype == BT_PICASSO4) {
printk(KERN_INFO " REG at $%lx\n", board_addr + 0x600000);
/* To be precise, for the P4 this is not the */
/* begin of the board, but the begin of RAM. */
/* for P4, map in its address space in 2 chunks (### TEST! ) */
/* (note the ugly hardcoded 16M number) */
cinfo->regbase = ioremap(board_addr, 16777216);
if (!cinfo->regbase)
goto err_release_region;
DPRINTK("cirrusfb: Virtual address for board set to: $%p\n",
cinfo->regbase);
cinfo->regbase += 0x600000;
info->fix.mmio_start = board_addr + 0x600000;
info->fix.smem_start = board_addr + 16777216;
info->screen_base = ioremap(info->fix.smem_start, 16777216);
if (!info->screen_base)
goto err_unmap_regbase;
} else {
printk(KERN_INFO " REG at $%lx\n",
(unsigned long) z2->resource.start);
info->fix.smem_start = board_addr;
if (board_addr > 0x01000000)
info->screen_base = ioremap(board_addr, board_size);
else
info->screen_base = (caddr_t) ZTWO_VADDR(board_addr);
if (!info->screen_base)
goto err_release_region;
/* set address for REG area of board */
cinfo->regbase = (caddr_t) ZTWO_VADDR(z2->resource.start);
info->fix.mmio_start = z2->resource.start;
DPRINTK("cirrusfb: Virtual address for board set to: $%p\n",
cinfo->regbase);
}
cinfo->unmap = cirrusfb_zorro_unmap;
printk(KERN_INFO "Cirrus Logic chipset on Zorro bus\n");
zorro_set_drvdata(z, info);
ret = cirrusfb_register(info);
if (ret) {
if (btype == BT_PICASSO4) {
iounmap(info->screen_base);
iounmap(cinfo->regbase - 0x600000);
} else if (board_addr > 0x01000000)
iounmap(info->screen_base);
}
return ret;
err_unmap_regbase:
/* Parental advisory: explicit hack */
iounmap(cinfo->regbase - 0x600000);
err_release_region:
release_region(board_addr, board_size);
err_release_fb:
framebuffer_release(info);
err_out:
return ret;
}
void __devexit cirrusfb_zorro_unregister(struct zorro_dev *z)
{
struct fb_info *info = zorro_get_drvdata(z);
DPRINTK("ENTER\n");
cirrusfb_cleanup(info);
DPRINTK("EXIT\n");
}
static struct zorro_driver cirrusfb_zorro_driver = {
.name = "cirrusfb",
.id_table = cirrusfb_zorro_table,
.probe = cirrusfb_zorro_register,
.remove = __devexit_p(cirrusfb_zorro_unregister),
};
#endif /* CONFIG_ZORRO */
static int __init cirrusfb_init(void)
{
int error = 0;
#ifndef MODULE
char *option = NULL;
if (fb_get_options("cirrusfb", &option))
return -ENODEV;
cirrusfb_setup(option);
#endif
#ifdef CONFIG_ZORRO
error |= zorro_register_driver(&cirrusfb_zorro_driver);
#endif
#ifdef CONFIG_PCI
error |= pci_register_driver(&cirrusfb_pci_driver);
#endif
return error;
}
#ifndef MODULE
static int __init cirrusfb_setup(char *options) {
char *this_opt;
DPRINTK("ENTER\n");
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!*this_opt)
continue;
DPRINTK("cirrusfb_setup: option '%s'\n", this_opt);
if (!strcmp(this_opt, "noaccel"))
noaccel = 1;
else if (!strncmp(this_opt, "mode:", 5))
mode_option = this_opt + 5;
else
mode_option = this_opt;
}
return 0;
}
#endif
/*
* Modularization
*/
MODULE_AUTHOR("Copyright 1999,2000 Jeff Garzik <jgarzik@pobox.com>");
MODULE_DESCRIPTION("Accelerated FBDev driver for Cirrus Logic chips");
MODULE_LICENSE("GPL");
static void __exit cirrusfb_exit(void)
{
#ifdef CONFIG_PCI
pci_unregister_driver(&cirrusfb_pci_driver);
#endif
#ifdef CONFIG_ZORRO
zorro_unregister_driver(&cirrusfb_zorro_driver);
#endif
}
module_init(cirrusfb_init);
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
module_param(noaccel, bool, 0);
MODULE_PARM_DESC(noaccel, "Disable acceleration");
#ifdef MODULE
module_exit(cirrusfb_exit);
#endif
/**********************************************************************/
/* about the following functions - I have used the same names for the */
/* functions as Markus Wild did in his Retina driver for NetBSD as */
/* they just made sense for this purpose. Apart from that, I wrote */
/* these functions myself. */
/**********************************************************************/
/*** WGen() - write into one of the external/general registers ***/
static void WGen(const struct cirrusfb_info *cinfo,
int regnum, unsigned char val)
{
unsigned long regofs = 0;
if (cinfo->btype == BT_PICASSO) {
/* Picasso II specific hack */
/* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D ||
regnum == CL_VSSM2) */
if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D)
regofs = 0xfff;
}
vga_w(cinfo->regbase, regofs + regnum, val);
}
/*** RGen() - read out one of the external/general registers ***/
static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum)
{
unsigned long regofs = 0;
if (cinfo->btype == BT_PICASSO) {
/* Picasso II specific hack */
/* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D ||
regnum == CL_VSSM2) */
if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D)
regofs = 0xfff;
}
return vga_r(cinfo->regbase, regofs + regnum);
}
/*** AttrOn() - turn on VideoEnable for Attribute controller ***/
static void AttrOn(const struct cirrusfb_info *cinfo)
{
assert(cinfo != NULL);
DPRINTK("ENTER\n");
if (vga_rcrt(cinfo->regbase, CL_CRT24) & 0x80) {
/* if we're just in "write value" mode, write back the */
/* same value as before to not modify anything */
vga_w(cinfo->regbase, VGA_ATT_IW,
vga_r(cinfo->regbase, VGA_ATT_R));
}
/* turn on video bit */
/* vga_w(cinfo->regbase, VGA_ATT_IW, 0x20); */
vga_w(cinfo->regbase, VGA_ATT_IW, 0x33);
/* dummy write on Reg0 to be on "write index" mode next time */
vga_w(cinfo->regbase, VGA_ATT_IW, 0x00);
DPRINTK("EXIT\n");
}
/*** WHDR() - write into the Hidden DAC register ***/
/* as the HDR is the only extension register that requires special treatment
* (the other extension registers are accessible just like the "ordinary"
* registers of their functional group) here is a specialized routine for
* accessing the HDR
*/
static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val)
{
unsigned char dummy;
if (cinfo->btype == BT_PICASSO) {
/* Klaus' hint for correct access to HDR on some boards */
/* first write 0 to pixel mask (3c6) */
WGen(cinfo, VGA_PEL_MSK, 0x00);
udelay(200);
/* next read dummy from pixel address (3c8) */
dummy = RGen(cinfo, VGA_PEL_IW);
udelay(200);
}
/* now do the usual stuff to access the HDR */
dummy = RGen(cinfo, VGA_PEL_MSK);
udelay(200);
dummy = RGen(cinfo, VGA_PEL_MSK);
udelay(200);
dummy = RGen(cinfo, VGA_PEL_MSK);
udelay(200);
dummy = RGen(cinfo, VGA_PEL_MSK);
udelay(200);
WGen(cinfo, VGA_PEL_MSK, val);
udelay(200);
if (cinfo->btype == BT_PICASSO) {
/* now first reset HDR access counter */
dummy = RGen(cinfo, VGA_PEL_IW);
udelay(200);
/* and at the end, restore the mask value */
/* ## is this mask always 0xff? */
WGen(cinfo, VGA_PEL_MSK, 0xff);
udelay(200);
}
}
/*** WSFR() - write to the "special function register" (SFR) ***/
static void WSFR(struct cirrusfb_info *cinfo, unsigned char val)
{
#ifdef CONFIG_ZORRO
assert(cinfo->regbase != NULL);
cinfo->SFR = val;
z_writeb(val, cinfo->regbase + 0x8000);
#endif
}
/* The Picasso has a second register for switching the monitor bit */
static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val)
{
#ifdef CONFIG_ZORRO
/* writing an arbitrary value to this one causes the monitor switcher */
/* to flip to Amiga display */
assert(cinfo->regbase != NULL);
cinfo->SFR = val;
z_writeb(val, cinfo->regbase + 0x9000);
#endif
}
/*** WClut - set CLUT entry (range: 0..63) ***/
static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char red,
unsigned char green, unsigned char blue)
{
unsigned int data = VGA_PEL_D;
/* address write mode register is not translated.. */
vga_w(cinfo->regbase, VGA_PEL_IW, regnum);
if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 ||
cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480) {
/* but DAC data register IS, at least for Picasso II */
if (cinfo->btype == BT_PICASSO)
data += 0xfff;
vga_w(cinfo->regbase, data, red);
vga_w(cinfo->regbase, data, green);
vga_w(cinfo->regbase, data, blue);
} else {
vga_w(cinfo->regbase, data, blue);
vga_w(cinfo->regbase, data, green);
vga_w(cinfo->regbase, data, red);
}
}
#if 0
/*** RClut - read CLUT entry (range 0..63) ***/
static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char *red,
unsigned char *green, unsigned char *blue)
{
unsigned int data = VGA_PEL_D;
vga_w(cinfo->regbase, VGA_PEL_IR, regnum);
if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 ||
cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480) {
if (cinfo->btype == BT_PICASSO)
data += 0xfff;
*red = vga_r(cinfo->regbase, data);
*green = vga_r(cinfo->regbase, data);
*blue = vga_r(cinfo->regbase, data);
} else {
*blue = vga_r(cinfo->regbase, data);
*green = vga_r(cinfo->regbase, data);
*red = vga_r(cinfo->regbase, data);
}
}
#endif
/*******************************************************************
cirrusfb_WaitBLT()
Wait for the BitBLT engine to complete a possible earlier job
*********************************************************************/
/* FIXME: use interrupts instead */
static void cirrusfb_WaitBLT(u8 __iomem *regbase)
{
/* now busy-wait until we're done */
while (vga_rgfx(regbase, CL_GR31) & 0x08)
/* do nothing */ ;
}
/*******************************************************************
cirrusfb_BitBLT()
perform accelerated "scrolling"
********************************************************************/
static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel,
u_short curx, u_short cury,
u_short destx, u_short desty,
u_short width, u_short height,
u_short line_length)
{
u_short nwidth, nheight;
u_long nsrc, ndest;
u_char bltmode;
DPRINTK("ENTER\n");
nwidth = width - 1;
nheight = height - 1;
bltmode = 0x00;
/* if source adr < dest addr, do the Blt backwards */
if (cury <= desty) {
if (cury == desty) {
/* if src and dest are on the same line, check x */
if (curx < destx)
bltmode |= 0x01;
} else
bltmode |= 0x01;
}
if (!bltmode) {
/* standard case: forward blitting */
nsrc = (cury * line_length) + curx;
ndest = (desty * line_length) + destx;
} else {
/* this means start addresses are at the end,
* counting backwards
*/
nsrc = cury * line_length + curx +
nheight * line_length + nwidth;
ndest = desty * line_length + destx +
nheight * line_length + nwidth;
}
/*
run-down of registers to be programmed:
destination pitch
source pitch
BLT width/height
source start
destination start
BLT mode
BLT ROP
VGA_GFX_SR_VALUE / VGA_GFX_SR_ENABLE: "fill color"
start/stop
*/
cirrusfb_WaitBLT(regbase);
/* pitch: set to line_length */
/* dest pitch low */
vga_wgfx(regbase, CL_GR24, line_length & 0xff);
/* dest pitch hi */
vga_wgfx(regbase, CL_GR25, line_length >> 8);
/* source pitch low */
vga_wgfx(regbase, CL_GR26, line_length & 0xff);
/* source pitch hi */
vga_wgfx(regbase, CL_GR27, line_length >> 8);
/* BLT width: actual number of pixels - 1 */
/* BLT width low */
vga_wgfx(regbase, CL_GR20, nwidth & 0xff);
/* BLT width hi */
vga_wgfx(regbase, CL_GR21, nwidth >> 8);
/* BLT height: actual number of lines -1 */
/* BLT height low */
vga_wgfx(regbase, CL_GR22, nheight & 0xff);
/* BLT width hi */
vga_wgfx(regbase, CL_GR23, nheight >> 8);
/* BLT destination */
/* BLT dest low */
vga_wgfx(regbase, CL_GR28, (u_char) (ndest & 0xff));
/* BLT dest mid */
vga_wgfx(regbase, CL_GR29, (u_char) (ndest >> 8));
/* BLT dest hi */
vga_wgfx(regbase, CL_GR2A, (u_char) (ndest >> 16));
/* BLT source */
/* BLT src low */
vga_wgfx(regbase, CL_GR2C, (u_char) (nsrc & 0xff));
/* BLT src mid */
vga_wgfx(regbase, CL_GR2D, (u_char) (nsrc >> 8));
/* BLT src hi */
vga_wgfx(regbase, CL_GR2E, (u_char) (nsrc >> 16));
/* BLT mode */
vga_wgfx(regbase, CL_GR30, bltmode); /* BLT mode */
/* BLT ROP: SrcCopy */
vga_wgfx(regbase, CL_GR32, 0x0d); /* BLT ROP */
/* and finally: GO! */
vga_wgfx(regbase, CL_GR31, 0x02); /* BLT Start/status */
DPRINTK("EXIT\n");
}
/*******************************************************************
cirrusfb_RectFill()
perform accelerated rectangle fill
********************************************************************/
static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
u_short x, u_short y, u_short width, u_short height,
u_char color, u_short line_length)
{
u_short nwidth, nheight;
u_long ndest;
u_char op;
DPRINTK("ENTER\n");
nwidth = width - 1;
nheight = height - 1;
ndest = (y * line_length) + x;
cirrusfb_WaitBLT(regbase);
/* pitch: set to line_length */
vga_wgfx(regbase, CL_GR24, line_length & 0xff); /* dest pitch low */
vga_wgfx(regbase, CL_GR25, line_length >> 8); /* dest pitch hi */
vga_wgfx(regbase, CL_GR26, line_length & 0xff); /* source pitch low */
vga_wgfx(regbase, CL_GR27, line_length >> 8); /* source pitch hi */
/* BLT width: actual number of pixels - 1 */
vga_wgfx(regbase, CL_GR20, nwidth & 0xff); /* BLT width low */
vga_wgfx(regbase, CL_GR21, nwidth >> 8); /* BLT width hi */
/* BLT height: actual number of lines -1 */
vga_wgfx(regbase, CL_GR22, nheight & 0xff); /* BLT height low */
vga_wgfx(regbase, CL_GR23, nheight >> 8); /* BLT width hi */
/* BLT destination */
/* BLT dest low */
vga_wgfx(regbase, CL_GR28, (u_char) (ndest & 0xff));
/* BLT dest mid */
vga_wgfx(regbase, CL_GR29, (u_char) (ndest >> 8));
/* BLT dest hi */
vga_wgfx(regbase, CL_GR2A, (u_char) (ndest >> 16));
/* BLT source: set to 0 (is a dummy here anyway) */
vga_wgfx(regbase, CL_GR2C, 0x00); /* BLT src low */
vga_wgfx(regbase, CL_GR2D, 0x00); /* BLT src mid */
vga_wgfx(regbase, CL_GR2E, 0x00); /* BLT src hi */
/* This is a ColorExpand Blt, using the */
/* same color for foreground and background */
vga_wgfx(regbase, VGA_GFX_SR_VALUE, color); /* foreground color */
vga_wgfx(regbase, VGA_GFX_SR_ENABLE, color); /* background color */
op = 0xc0;
if (bits_per_pixel == 16) {
vga_wgfx(regbase, CL_GR10, color); /* foreground color */
vga_wgfx(regbase, CL_GR11, color); /* background color */
op = 0x50;
op = 0xd0;
} else if (bits_per_pixel == 32) {
vga_wgfx(regbase, CL_GR10, color); /* foreground color */
vga_wgfx(regbase, CL_GR11, color); /* background color */
vga_wgfx(regbase, CL_GR12, color); /* foreground color */
vga_wgfx(regbase, CL_GR13, color); /* background color */
vga_wgfx(regbase, CL_GR14, 0); /* foreground color */
vga_wgfx(regbase, CL_GR15, 0); /* background color */
op = 0x50;
op = 0xf0;
}
/* BLT mode: color expand, Enable 8x8 copy (faster?) */
vga_wgfx(regbase, CL_GR30, op); /* BLT mode */
/* BLT ROP: SrcCopy */
vga_wgfx(regbase, CL_GR32, 0x0d); /* BLT ROP */
/* and finally: GO! */
vga_wgfx(regbase, CL_GR31, 0x02); /* BLT Start/status */
DPRINTK("EXIT\n");
}
/**************************************************************************
* bestclock() - determine closest possible clock lower(?) than the
* desired pixel clock
**************************************************************************/
static void bestclock(long freq, int *nom, int *den, int *div)
{
int n, d;
long h, diff;
assert(nom != NULL);
assert(den != NULL);
assert(div != NULL);
*nom = 0;
*den = 0;
*div = 0;
DPRINTK("ENTER\n");
if (freq < 8000)
freq = 8000;
diff = freq;
for (n = 32; n < 128; n++) {
int s = 0;
d = (14318 * n) / freq;
if ((d >= 7) && (d <= 63)) {
int temp = d;
if (temp > 31) {
s = 1;
temp >>= 1;
}
h = ((14318 * n) / temp) >> s;
h = h > freq ? h - freq : freq - h;
if (h < diff) {
diff = h;
*nom = n;
*den = temp;
*div = s;
}
}
d++;
if ((d >= 7) && (d <= 63)) {
if (d > 31) {
s = 1;
d >>= 1;
}
h = ((14318 * n) / d) >> s;
h = h > freq ? h - freq : freq - h;
if (h < diff) {
diff = h;
*nom = n;
*den = d;
*div = s;
}
}
}
DPRINTK("Best possible values for given frequency:\n");
DPRINTK(" freq: %ld kHz nom: %d den: %d div: %d\n",
freq, *nom, *den, *div);
DPRINTK("EXIT\n");
}
/* -------------------------------------------------------------------------
*
* debugging functions
*
* -------------------------------------------------------------------------
*/
#ifdef CIRRUSFB_DEBUG
/**
* cirrusfb_dbg_print_byte
* @name: name associated with byte value to be displayed
* @val: byte value to be displayed
*
* DESCRIPTION:
* Display an indented string, along with a hexidecimal byte value, and
* its decoded bits. Bits 7 through 0 are listed in left-to-right
* order.
*/
static
void cirrusfb_dbg_print_byte(const char *name, unsigned char val)
{
DPRINTK("%8s = 0x%02X (bits 7-0: %c%c%c%c%c%c%c%c)\n",
name, val,
val & 0x80 ? '1' : '0',
val & 0x40 ? '1' : '0',
val & 0x20 ? '1' : '0',
val & 0x10 ? '1' : '0',
val & 0x08 ? '1' : '0',
val & 0x04 ? '1' : '0',
val & 0x02 ? '1' : '0',
val & 0x01 ? '1' : '0');
}
/**
* cirrusfb_dbg_print_regs
* @base: If using newmmio, the newmmio base address, otherwise %NULL
* @reg_class: type of registers to read: %CRT, or %SEQ
*
* DESCRIPTION:
* Dumps the given list of VGA CRTC registers. If @base is %NULL,
* old-style I/O ports are queried for information, otherwise MMIO is
* used at the given @base address to query the information.
*/
static
void cirrusfb_dbg_print_regs(caddr_t regbase,
enum cirrusfb_dbg_reg_class reg_class, ...)
{
va_list list;
unsigned char val = 0;
unsigned reg;
char *name;
va_start(list, reg_class);
name = va_arg(list, char *);
while (name != NULL) {
reg = va_arg(list, int);
switch (reg_class) {
case CRT:
val = vga_rcrt(regbase, (unsigned char) reg);
break;
case SEQ:
val = vga_rseq(regbase, (unsigned char) reg);
break;
default:
/* should never occur */
assert(false);
break;
}
cirrusfb_dbg_print_byte(name, val);
name = va_arg(list, char *);
}
va_end(list);
}
/**
* cirrusfb_dump
* @cirrusfbinfo:
*
* DESCRIPTION:
*/
static void cirrusfb_dump(void)
{
cirrusfb_dbg_reg_dump(NULL);
}
/**
* cirrusfb_dbg_reg_dump
* @base: If using newmmio, the newmmio base address, otherwise %NULL
*
* DESCRIPTION:
* Dumps a list of interesting VGA and CIRRUSFB registers. If @base is %NULL,
* old-style I/O ports are queried for information, otherwise MMIO is
* used at the given @base address to query the information.
*/
static
void cirrusfb_dbg_reg_dump(caddr_t regbase)
{
DPRINTK("CIRRUSFB VGA CRTC register dump:\n");
cirrusfb_dbg_print_regs(regbase, CRT,
"CR00", 0x00,
"CR01", 0x01,
"CR02", 0x02,
"CR03", 0x03,
"CR04", 0x04,
"CR05", 0x05,
"CR06", 0x06,
"CR07", 0x07,
"CR08", 0x08,
"CR09", 0x09,
"CR0A", 0x0A,
"CR0B", 0x0B,
"CR0C", 0x0C,
"CR0D", 0x0D,
"CR0E", 0x0E,
"CR0F", 0x0F,
"CR10", 0x10,
"CR11", 0x11,
"CR12", 0x12,
"CR13", 0x13,
"CR14", 0x14,
"CR15", 0x15,
"CR16", 0x16,
"CR17", 0x17,
"CR18", 0x18,
"CR22", 0x22,
"CR24", 0x24,
"CR26", 0x26,
"CR2D", 0x2D,
"CR2E", 0x2E,
"CR2F", 0x2F,
"CR30", 0x30,
"CR31", 0x31,
"CR32", 0x32,
"CR33", 0x33,
"CR34", 0x34,
"CR35", 0x35,
"CR36", 0x36,
"CR37", 0x37,
"CR38", 0x38,
"CR39", 0x39,
"CR3A", 0x3A,
"CR3B", 0x3B,
"CR3C", 0x3C,
"CR3D", 0x3D,
"CR3E", 0x3E,
"CR3F", 0x3F,
NULL);
DPRINTK("\n");
DPRINTK("CIRRUSFB VGA SEQ register dump:\n");
cirrusfb_dbg_print_regs(regbase, SEQ,
"SR00", 0x00,
"SR01", 0x01,
"SR02", 0x02,
"SR03", 0x03,
"SR04", 0x04,
"SR08", 0x08,
"SR09", 0x09,
"SR0A", 0x0A,
"SR0B", 0x0B,
"SR0D", 0x0D,
"SR10", 0x10,
"SR11", 0x11,
"SR12", 0x12,
"SR13", 0x13,
"SR14", 0x14,
"SR15", 0x15,
"SR16", 0x16,
"SR17", 0x17,
"SR18", 0x18,
"SR19", 0x19,
"SR1A", 0x1A,
"SR1B", 0x1B,
"SR1C", 0x1C,
"SR1D", 0x1D,
"SR1E", 0x1E,
"SR1F", 0x1F,
NULL);
DPRINTK("\n");
}
#endif /* CIRRUSFB_DEBUG */
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