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cyber2000fb.c
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cyber2000fb.c
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/*
* linux/drivers/video/cyber2000fb.c
*
* Copyright (C) 1998-2002 Russell King
*
* MIPS and 50xx clock support
* Copyright (C) 2001 Bradley D. LaRonde <brad@ltc.com>
*
* 32 bit support, text color and panning fixes for modes != 8 bit
* Copyright (C) 2002 Denis Oliver Kropp <dok@directfb.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Integraphics CyberPro 2000, 2010 and 5000 frame buffer device
*
* Based on cyberfb.c.
*
* Note that we now use the new fbcon fix, var and cmap scheme. We do
* still have to check which console is the currently displayed one
* however, especially for the colourmap stuff.
*
* We also use the new hotplug PCI subsystem. I'm not sure if there
* are any such cards, but I'm erring on the side of caution. We don't
* want to go pop just because someone does have one.
*
* Note that this doesn't work fully in the case of multiple CyberPro
* cards with grabbers. We currently can only attach to the first
* CyberPro card found.
*
* When we're in truecolour mode, we power down the LUT RAM as a power
* saving feature. Also, when we enter any of the powersaving modes
* (except soft blanking) we power down the RAMDACs. This saves about
* 1W, which is roughly 8% of the power consumption of a NetWinder
* (which, incidentally, is about the same saving as a 2.5in hard disk
* entering standby mode.)
*/
#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/pci.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#ifdef __arm__
#include <asm/mach-types.h>
#endif
#include "cyber2000fb.h"
struct cfb_info {
struct fb_info fb;
struct display_switch *dispsw;
struct display *display;
struct pci_dev *dev;
unsigned char __iomem *region;
unsigned char __iomem *regs;
u_int id;
int func_use_count;
u_long ref_ps;
/*
* Clock divisors
*/
u_int divisors[4];
struct {
u8 red, green, blue;
} palette[NR_PALETTE];
u_char mem_ctl1;
u_char mem_ctl2;
u_char mclk_mult;
u_char mclk_div;
/*
* RAMDAC control register is both of these or'ed together
*/
u_char ramdac_ctrl;
u_char ramdac_powerdown;
u32 pseudo_palette[16];
};
static char *default_font = "Acorn8x8";
module_param(default_font, charp, 0);
MODULE_PARM_DESC(default_font, "Default font name");
/*
* Our access methods.
*/
#define cyber2000fb_writel(val, reg, cfb) writel(val, (cfb)->regs + (reg))
#define cyber2000fb_writew(val, reg, cfb) writew(val, (cfb)->regs + (reg))
#define cyber2000fb_writeb(val, reg, cfb) writeb(val, (cfb)->regs + (reg))
#define cyber2000fb_readb(reg, cfb) readb((cfb)->regs + (reg))
static inline void
cyber2000_crtcw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
{
cyber2000fb_writew((reg & 255) | val << 8, 0x3d4, cfb);
}
static inline void
cyber2000_grphw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
{
cyber2000fb_writew((reg & 255) | val << 8, 0x3ce, cfb);
}
static inline unsigned int
cyber2000_grphr(unsigned int reg, struct cfb_info *cfb)
{
cyber2000fb_writeb(reg, 0x3ce, cfb);
return cyber2000fb_readb(0x3cf, cfb);
}
static inline void
cyber2000_attrw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
{
cyber2000fb_readb(0x3da, cfb);
cyber2000fb_writeb(reg, 0x3c0, cfb);
cyber2000fb_readb(0x3c1, cfb);
cyber2000fb_writeb(val, 0x3c0, cfb);
}
static inline void
cyber2000_seqw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
{
cyber2000fb_writew((reg & 255) | val << 8, 0x3c4, cfb);
}
/* -------------------- Hardware specific routines ------------------------- */
/*
* Hardware Cyber2000 Acceleration
*/
static void
cyber2000fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
struct cfb_info *cfb = (struct cfb_info *)info;
unsigned long dst, col;
if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT)) {
cfb_fillrect(info, rect);
return;
}
cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
cyber2000fb_writew(rect->width - 1, CO_REG_PIXWIDTH, cfb);
cyber2000fb_writew(rect->height - 1, CO_REG_PIXHEIGHT, cfb);
col = rect->color;
if (cfb->fb.var.bits_per_pixel > 8)
col = ((u32 *)cfb->fb.pseudo_palette)[col];
cyber2000fb_writel(col, CO_REG_FGCOLOUR, cfb);
dst = rect->dx + rect->dy * cfb->fb.var.xres_virtual;
if (cfb->fb.var.bits_per_pixel == 24) {
cyber2000fb_writeb(dst, CO_REG_X_PHASE, cfb);
dst *= 3;
}
cyber2000fb_writel(dst, CO_REG_DEST_PTR, cfb);
cyber2000fb_writeb(CO_FG_MIX_SRC, CO_REG_FGMIX, cfb);
cyber2000fb_writew(CO_CMD_L_PATTERN_FGCOL, CO_REG_CMD_L, cfb);
cyber2000fb_writew(CO_CMD_H_BLITTER, CO_REG_CMD_H, cfb);
}
static void
cyber2000fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
{
struct cfb_info *cfb = (struct cfb_info *)info;
unsigned int cmd = CO_CMD_L_PATTERN_FGCOL;
unsigned long src, dst;
if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT)) {
cfb_copyarea(info, region);
return;
}
cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
cyber2000fb_writew(region->width - 1, CO_REG_PIXWIDTH, cfb);
cyber2000fb_writew(region->height - 1, CO_REG_PIXHEIGHT, cfb);
src = region->sx + region->sy * cfb->fb.var.xres_virtual;
dst = region->dx + region->dy * cfb->fb.var.xres_virtual;
if (region->sx < region->dx) {
src += region->width - 1;
dst += region->width - 1;
cmd |= CO_CMD_L_INC_LEFT;
}
if (region->sy < region->dy) {
src += (region->height - 1) * cfb->fb.var.xres_virtual;
dst += (region->height - 1) * cfb->fb.var.xres_virtual;
cmd |= CO_CMD_L_INC_UP;
}
if (cfb->fb.var.bits_per_pixel == 24) {
cyber2000fb_writeb(dst, CO_REG_X_PHASE, cfb);
src *= 3;
dst *= 3;
}
cyber2000fb_writel(src, CO_REG_SRC1_PTR, cfb);
cyber2000fb_writel(dst, CO_REG_DEST_PTR, cfb);
cyber2000fb_writew(CO_FG_MIX_SRC, CO_REG_FGMIX, cfb);
cyber2000fb_writew(cmd, CO_REG_CMD_L, cfb);
cyber2000fb_writew(CO_CMD_H_FGSRCMAP | CO_CMD_H_BLITTER,
CO_REG_CMD_H, cfb);
}
static void
cyber2000fb_imageblit(struct fb_info *info, const struct fb_image *image)
{
cfb_imageblit(info, image);
return;
}
static int cyber2000fb_sync(struct fb_info *info)
{
struct cfb_info *cfb = (struct cfb_info *)info;
int count = 100000;
if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT))
return 0;
while (cyber2000fb_readb(CO_REG_CONTROL, cfb) & CO_CTRL_BUSY) {
if (!count--) {
debug_printf("accel_wait timed out\n");
cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
break;
}
udelay(1);
}
return 0;
}
/*
* ===========================================================================
*/
static inline u32 convert_bitfield(u_int val, struct fb_bitfield *bf)
{
u_int mask = (1 << bf->length) - 1;
return (val >> (16 - bf->length) & mask) << bf->offset;
}
/*
* Set a single color register. Return != 0 for invalid regno.
*/
static int
cyber2000fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
struct cfb_info *cfb = (struct cfb_info *)info;
struct fb_var_screeninfo *var = &cfb->fb.var;
u32 pseudo_val;
int ret = 1;
switch (cfb->fb.fix.visual) {
default:
return 1;
/*
* Pseudocolour:
* 8 8
* pixel --/--+--/--> red lut --> red dac
* | 8
* +--/--> green lut --> green dac
* | 8
* +--/--> blue lut --> blue dac
*/
case FB_VISUAL_PSEUDOCOLOR:
if (regno >= NR_PALETTE)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
cfb->palette[regno].red = red;
cfb->palette[regno].green = green;
cfb->palette[regno].blue = blue;
cyber2000fb_writeb(regno, 0x3c8, cfb);
cyber2000fb_writeb(red, 0x3c9, cfb);
cyber2000fb_writeb(green, 0x3c9, cfb);
cyber2000fb_writeb(blue, 0x3c9, cfb);
return 0;
/*
* Direct colour:
* n rl
* pixel --/--+--/--> red lut --> red dac
* | gl
* +--/--> green lut --> green dac
* | bl
* +--/--> blue lut --> blue dac
* n = bpp, rl = red length, gl = green length, bl = blue length
*/
case FB_VISUAL_DIRECTCOLOR:
red >>= 8;
green >>= 8;
blue >>= 8;
if (var->green.length == 6 && regno < 64) {
cfb->palette[regno << 2].green = green;
/*
* The 6 bits of the green component are applied
* to the high 6 bits of the LUT.
*/
cyber2000fb_writeb(regno << 2, 0x3c8, cfb);
cyber2000fb_writeb(cfb->palette[regno >> 1].red,
0x3c9, cfb);
cyber2000fb_writeb(green, 0x3c9, cfb);
cyber2000fb_writeb(cfb->palette[regno >> 1].blue,
0x3c9, cfb);
green = cfb->palette[regno << 3].green;
ret = 0;
}
if (var->green.length >= 5 && regno < 32) {
cfb->palette[regno << 3].red = red;
cfb->palette[regno << 3].green = green;
cfb->palette[regno << 3].blue = blue;
/*
* The 5 bits of each colour component are
* applied to the high 5 bits of the LUT.
*/
cyber2000fb_writeb(regno << 3, 0x3c8, cfb);
cyber2000fb_writeb(red, 0x3c9, cfb);
cyber2000fb_writeb(green, 0x3c9, cfb);
cyber2000fb_writeb(blue, 0x3c9, cfb);
ret = 0;
}
if (var->green.length == 4 && regno < 16) {
cfb->palette[regno << 4].red = red;
cfb->palette[regno << 4].green = green;
cfb->palette[regno << 4].blue = blue;
/*
* The 5 bits of each colour component are
* applied to the high 5 bits of the LUT.
*/
cyber2000fb_writeb(regno << 4, 0x3c8, cfb);
cyber2000fb_writeb(red, 0x3c9, cfb);
cyber2000fb_writeb(green, 0x3c9, cfb);
cyber2000fb_writeb(blue, 0x3c9, cfb);
ret = 0;
}
/*
* Since this is only used for the first 16 colours, we
* don't have to care about overflowing for regno >= 32
*/
pseudo_val = regno << var->red.offset |
regno << var->green.offset |
regno << var->blue.offset;
break;
/*
* True colour:
* n rl
* pixel --/--+--/--> red dac
* | gl
* +--/--> green dac
* | bl
* +--/--> blue dac
* n = bpp, rl = red length, gl = green length, bl = blue length
*/
case FB_VISUAL_TRUECOLOR:
pseudo_val = convert_bitfield(transp ^ 0xffff, &var->transp);
pseudo_val |= convert_bitfield(red, &var->red);
pseudo_val |= convert_bitfield(green, &var->green);
pseudo_val |= convert_bitfield(blue, &var->blue);
ret = 0;
break;
}
/*
* Now set our pseudo palette for the CFB16/24/32 drivers.
*/
if (regno < 16)
((u32 *)cfb->fb.pseudo_palette)[regno] = pseudo_val;
return ret;
}
struct par_info {
/*
* Hardware
*/
u_char clock_mult;
u_char clock_div;
u_char extseqmisc;
u_char co_pixfmt;
u_char crtc_ofl;
u_char crtc[19];
u_int width;
u_int pitch;
u_int fetch;
/*
* Other
*/
u_char ramdac;
};
static const u_char crtc_idx[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18
};
static void cyber2000fb_write_ramdac_ctrl(struct cfb_info *cfb)
{
unsigned int i;
unsigned int val = cfb->ramdac_ctrl | cfb->ramdac_powerdown;
cyber2000fb_writeb(0x56, 0x3ce, cfb);
i = cyber2000fb_readb(0x3cf, cfb);
cyber2000fb_writeb(i | 4, 0x3cf, cfb);
cyber2000fb_writeb(val, 0x3c6, cfb);
cyber2000fb_writeb(i, 0x3cf, cfb);
/* prevent card lock-up observed on x86 with CyberPro 2000 */
cyber2000fb_readb(0x3cf, cfb);
}
static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw)
{
u_int i;
/*
* Blank palette
*/
for (i = 0; i < NR_PALETTE; i++) {
cyber2000fb_writeb(i, 0x3c8, cfb);
cyber2000fb_writeb(0, 0x3c9, cfb);
cyber2000fb_writeb(0, 0x3c9, cfb);
cyber2000fb_writeb(0, 0x3c9, cfb);
}
cyber2000fb_writeb(0xef, 0x3c2, cfb);
cyber2000_crtcw(0x11, 0x0b, cfb);
cyber2000_attrw(0x11, 0x00, cfb);
cyber2000_seqw(0x00, 0x01, cfb);
cyber2000_seqw(0x01, 0x01, cfb);
cyber2000_seqw(0x02, 0x0f, cfb);
cyber2000_seqw(0x03, 0x00, cfb);
cyber2000_seqw(0x04, 0x0e, cfb);
cyber2000_seqw(0x00, 0x03, cfb);
for (i = 0; i < sizeof(crtc_idx); i++)
cyber2000_crtcw(crtc_idx[i], hw->crtc[i], cfb);
for (i = 0x0a; i < 0x10; i++)
cyber2000_crtcw(i, 0, cfb);
cyber2000_grphw(EXT_CRT_VRTOFL, hw->crtc_ofl, cfb);
cyber2000_grphw(0x00, 0x00, cfb);
cyber2000_grphw(0x01, 0x00, cfb);
cyber2000_grphw(0x02, 0x00, cfb);
cyber2000_grphw(0x03, 0x00, cfb);
cyber2000_grphw(0x04, 0x00, cfb);
cyber2000_grphw(0x05, 0x60, cfb);
cyber2000_grphw(0x06, 0x05, cfb);
cyber2000_grphw(0x07, 0x0f, cfb);
cyber2000_grphw(0x08, 0xff, cfb);
/* Attribute controller registers */
for (i = 0; i < 16; i++)
cyber2000_attrw(i, i, cfb);
cyber2000_attrw(0x10, 0x01, cfb);
cyber2000_attrw(0x11, 0x00, cfb);
cyber2000_attrw(0x12, 0x0f, cfb);
cyber2000_attrw(0x13, 0x00, cfb);
cyber2000_attrw(0x14, 0x00, cfb);
/* PLL registers */
cyber2000_grphw(EXT_DCLK_MULT, hw->clock_mult, cfb);
cyber2000_grphw(EXT_DCLK_DIV, hw->clock_div, cfb);
cyber2000_grphw(EXT_MCLK_MULT, cfb->mclk_mult, cfb);
cyber2000_grphw(EXT_MCLK_DIV, cfb->mclk_div, cfb);
cyber2000_grphw(0x90, 0x01, cfb);
cyber2000_grphw(0xb9, 0x80, cfb);
cyber2000_grphw(0xb9, 0x00, cfb);
cfb->ramdac_ctrl = hw->ramdac;
cyber2000fb_write_ramdac_ctrl(cfb);
cyber2000fb_writeb(0x20, 0x3c0, cfb);
cyber2000fb_writeb(0xff, 0x3c6, cfb);
cyber2000_grphw(0x14, hw->fetch, cfb);
cyber2000_grphw(0x15, ((hw->fetch >> 8) & 0x03) |
((hw->pitch >> 4) & 0x30), cfb);
cyber2000_grphw(EXT_SEQ_MISC, hw->extseqmisc, cfb);
/*
* Set up accelerator registers
*/
cyber2000fb_writew(hw->width, CO_REG_SRC_WIDTH, cfb);
cyber2000fb_writew(hw->width, CO_REG_DEST_WIDTH, cfb);
cyber2000fb_writeb(hw->co_pixfmt, CO_REG_PIXFMT, cfb);
}
static inline int
cyber2000fb_update_start(struct cfb_info *cfb, struct fb_var_screeninfo *var)
{
u_int base = var->yoffset * var->xres_virtual + var->xoffset;
base *= var->bits_per_pixel;
/*
* Convert to bytes and shift two extra bits because DAC
* can only start on 4 byte aligned data.
*/
base >>= 5;
if (base >= 1 << 20)
return -EINVAL;
cyber2000_grphw(0x10, base >> 16 | 0x10, cfb);
cyber2000_crtcw(0x0c, base >> 8, cfb);
cyber2000_crtcw(0x0d, base, cfb);
return 0;
}
static int
cyber2000fb_decode_crtc(struct par_info *hw, struct cfb_info *cfb,
struct fb_var_screeninfo *var)
{
u_int Htotal, Hblankend, Hsyncend;
u_int Vtotal, Vdispend, Vblankstart, Vblankend, Vsyncstart, Vsyncend;
#define ENCODE_BIT(v, b1, m, b2) ((((v) >> (b1)) & (m)) << (b2))
hw->crtc[13] = hw->pitch;
hw->crtc[17] = 0xe3;
hw->crtc[14] = 0;
hw->crtc[8] = 0;
Htotal = var->xres + var->right_margin +
var->hsync_len + var->left_margin;
if (Htotal > 2080)
return -EINVAL;
hw->crtc[0] = (Htotal >> 3) - 5;
hw->crtc[1] = (var->xres >> 3) - 1;
hw->crtc[2] = var->xres >> 3;
hw->crtc[4] = (var->xres + var->right_margin) >> 3;
Hblankend = (Htotal - 4 * 8) >> 3;
hw->crtc[3] = ENCODE_BIT(Hblankend, 0, 0x1f, 0) |
ENCODE_BIT(1, 0, 0x01, 7);
Hsyncend = (var->xres + var->right_margin + var->hsync_len) >> 3;
hw->crtc[5] = ENCODE_BIT(Hsyncend, 0, 0x1f, 0) |
ENCODE_BIT(Hblankend, 5, 0x01, 7);
Vdispend = var->yres - 1;
Vsyncstart = var->yres + var->lower_margin;
Vsyncend = var->yres + var->lower_margin + var->vsync_len;
Vtotal = var->yres + var->lower_margin + var->vsync_len +
var->upper_margin - 2;
if (Vtotal > 2047)
return -EINVAL;
Vblankstart = var->yres + 6;
Vblankend = Vtotal - 10;
hw->crtc[6] = Vtotal;
hw->crtc[7] = ENCODE_BIT(Vtotal, 8, 0x01, 0) |
ENCODE_BIT(Vdispend, 8, 0x01, 1) |
ENCODE_BIT(Vsyncstart, 8, 0x01, 2) |
ENCODE_BIT(Vblankstart, 8, 0x01, 3) |
ENCODE_BIT(1, 0, 0x01, 4) |
ENCODE_BIT(Vtotal, 9, 0x01, 5) |
ENCODE_BIT(Vdispend, 9, 0x01, 6) |
ENCODE_BIT(Vsyncstart, 9, 0x01, 7);
hw->crtc[9] = ENCODE_BIT(0, 0, 0x1f, 0) |
ENCODE_BIT(Vblankstart, 9, 0x01, 5) |
ENCODE_BIT(1, 0, 0x01, 6);
hw->crtc[10] = Vsyncstart;
hw->crtc[11] = ENCODE_BIT(Vsyncend, 0, 0x0f, 0) |
ENCODE_BIT(1, 0, 0x01, 7);
hw->crtc[12] = Vdispend;
hw->crtc[15] = Vblankstart;
hw->crtc[16] = Vblankend;
hw->crtc[18] = 0xff;
/*
* overflow - graphics reg 0x11
* 0=VTOTAL:10 1=VDEND:10 2=VRSTART:10 3=VBSTART:10
* 4=LINECOMP:10 5-IVIDEO 6=FIXCNT
*/
hw->crtc_ofl =
ENCODE_BIT(Vtotal, 10, 0x01, 0) |
ENCODE_BIT(Vdispend, 10, 0x01, 1) |
ENCODE_BIT(Vsyncstart, 10, 0x01, 2) |
ENCODE_BIT(Vblankstart, 10, 0x01, 3) |
EXT_CRT_VRTOFL_LINECOMP10;
/* woody: set the interlaced bit... */
/* FIXME: what about doublescan? */
if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED)
hw->crtc_ofl |= EXT_CRT_VRTOFL_INTERLACE;
return 0;
}
/*
* The following was discovered by a good monitor, bit twiddling, theorising
* and but mostly luck. Strangely, it looks like everyone elses' PLL!
*
* Clock registers:
* fclock = fpll / div2
* fpll = fref * mult / div1
* where:
* fref = 14.318MHz (69842ps)
* mult = reg0xb0.7:0
* div1 = (reg0xb1.5:0 + 1)
* div2 = 2^(reg0xb1.7:6)
* fpll should be between 115 and 260 MHz
* (8696ps and 3846ps)
*/
static int
cyber2000fb_decode_clock(struct par_info *hw, struct cfb_info *cfb,
struct fb_var_screeninfo *var)
{
u_long pll_ps = var->pixclock;
const u_long ref_ps = cfb->ref_ps;
u_int div2, t_div1, best_div1, best_mult;
int best_diff;
int vco;
/*
* Step 1:
* find div2 such that 115MHz < fpll < 260MHz
* and 0 <= div2 < 4
*/
for (div2 = 0; div2 < 4; div2++) {
u_long new_pll;
new_pll = pll_ps / cfb->divisors[div2];
if (8696 > new_pll && new_pll > 3846) {
pll_ps = new_pll;
break;
}
}
if (div2 == 4)
return -EINVAL;
/*
* Step 2:
* Given pll_ps and ref_ps, find:
* pll_ps * 0.995 < pll_ps_calc < pll_ps * 1.005
* where { 1 < best_div1 < 32, 1 < best_mult < 256 }
* pll_ps_calc = best_div1 / (ref_ps * best_mult)
*/
best_diff = 0x7fffffff;
best_mult = 32;
best_div1 = 255;
for (t_div1 = 32; t_div1 > 1; t_div1 -= 1) {
u_int rr, t_mult, t_pll_ps;
int diff;
/*
* Find the multiplier for this divisor
*/
rr = ref_ps * t_div1;
t_mult = (rr + pll_ps / 2) / pll_ps;
/*
* Is the multiplier within the correct range?
*/
if (t_mult > 256 || t_mult < 2)
continue;
/*
* Calculate the actual clock period from this multiplier
* and divisor, and estimate the error.
*/
t_pll_ps = (rr + t_mult / 2) / t_mult;
diff = pll_ps - t_pll_ps;
if (diff < 0)
diff = -diff;
if (diff < best_diff) {
best_diff = diff;
best_mult = t_mult;
best_div1 = t_div1;
}
/*
* If we hit an exact value, there is no point in continuing.
*/
if (diff == 0)
break;
}
/*
* Step 3:
* combine values
*/
hw->clock_mult = best_mult - 1;
hw->clock_div = div2 << 6 | (best_div1 - 1);
vco = ref_ps * best_div1 / best_mult;
if ((ref_ps == 40690) && (vco < 5556))
/* Set VFSEL when VCO > 180MHz (5.556 ps). */
hw->clock_div |= EXT_DCLK_DIV_VFSEL;
return 0;
}
/*
* Set the User Defined Part of the Display
*/
static int
cyber2000fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct cfb_info *cfb = (struct cfb_info *)info;
struct par_info hw;
unsigned int mem;
int err;
var->transp.msb_right = 0;
var->red.msb_right = 0;
var->green.msb_right = 0;
var->blue.msb_right = 0;
var->transp.offset = 0;
var->transp.length = 0;
switch (var->bits_per_pixel) {
case 8: /* PSEUDOCOLOUR, 256 */
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 0;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
break;
case 16:/* DIRECTCOLOUR, 64k or 32k */
switch (var->green.length) {
case 6: /* RGB565, 64k */
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
break;
default:
case 5: /* RGB555, 32k */
var->red.offset = 10;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 5;
var->blue.offset = 0;
var->blue.length = 5;
break;
case 4: /* RGB444, 4k + transparency? */
var->transp.offset = 12;
var->transp.length = 4;
var->red.offset = 8;
var->red.length = 4;
var->green.offset = 4;
var->green.length = 4;
var->blue.offset = 0;
var->blue.length = 4;
break;
}
break;
case 24:/* TRUECOLOUR, 16m */
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
break;
case 32:/* TRUECOLOUR, 16m */
var->transp.offset = 24;
var->transp.length = 8;
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
break;
default:
return -EINVAL;
}
mem = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel / 8);
if (mem > cfb->fb.fix.smem_len)
var->yres_virtual = cfb->fb.fix.smem_len * 8 /
(var->bits_per_pixel * var->xres_virtual);
if (var->yres > var->yres_virtual)
var->yres = var->yres_virtual;
if (var->xres > var->xres_virtual)
var->xres = var->xres_virtual;
err = cyber2000fb_decode_clock(&hw, cfb, var);
if (err)
return err;
err = cyber2000fb_decode_crtc(&hw, cfb, var);
if (err)
return err;
return 0;
}
static int cyber2000fb_set_par(struct fb_info *info)
{
struct cfb_info *cfb = (struct cfb_info *)info;
struct fb_var_screeninfo *var = &cfb->fb.var;
struct par_info hw;
unsigned int mem;
hw.width = var->xres_virtual;
hw.ramdac = RAMDAC_VREFEN | RAMDAC_DAC8BIT;
switch (var->bits_per_pixel) {
case 8:
hw.co_pixfmt = CO_PIXFMT_8BPP;
hw.pitch = hw.width >> 3;
hw.extseqmisc = EXT_SEQ_MISC_8;
break;
case 16:
hw.co_pixfmt = CO_PIXFMT_16BPP;
hw.pitch = hw.width >> 2;
switch (var->green.length) {
case 6: /* RGB565, 64k */
hw.extseqmisc = EXT_SEQ_MISC_16_RGB565;
break;
case 5: /* RGB555, 32k */
hw.extseqmisc = EXT_SEQ_MISC_16_RGB555;
break;
case 4: /* RGB444, 4k + transparency? */
hw.extseqmisc = EXT_SEQ_MISC_16_RGB444;
break;
default:
BUG();
}
break;
case 24:/* TRUECOLOUR, 16m */
hw.co_pixfmt = CO_PIXFMT_24BPP;
hw.width *= 3;
hw.pitch = hw.width >> 3;
hw.ramdac |= (RAMDAC_BYPASS | RAMDAC_RAMPWRDN);
hw.extseqmisc = EXT_SEQ_MISC_24_RGB888;
break;
case 32:/* TRUECOLOUR, 16m */
hw.co_pixfmt = CO_PIXFMT_32BPP;
hw.pitch = hw.width >> 1;
hw.ramdac |= (RAMDAC_BYPASS | RAMDAC_RAMPWRDN);
hw.extseqmisc = EXT_SEQ_MISC_32;
break;
default:
BUG();
}
/*
* Sigh, this is absolutely disgusting, but caused by
* the way the fbcon developers want to separate out
* the "checking" and the "setting" of the video mode.
*
* If the mode is not suitable for the hardware here,
* we can't prevent it being set by returning an error.
*
* In theory, since NetWinders contain just one VGA card,
* we should never end up hitting this problem.
*/
BUG_ON(cyber2000fb_decode_clock(&hw, cfb, var) != 0);
BUG_ON(cyber2000fb_decode_crtc(&hw, cfb, var) != 0);
hw.width -= 1;
hw.fetch = hw.pitch;
if (!(cfb->mem_ctl2 & MEM_CTL2_64BIT))
hw.fetch <<= 1;
hw.fetch += 1;
cfb->fb.fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
/*
* Same here - if the size of the video mode exceeds the
* available RAM, we can't prevent this mode being set.
*
* In theory, since NetWinders contain just one VGA card,
* we should never end up hitting this problem.
*/
mem = cfb->fb.fix.line_length * var->yres_virtual;
BUG_ON(mem > cfb->fb.fix.smem_len);
/*
* 8bpp displays are always pseudo colour. 16bpp and above
* are direct colour or true colour, depending on whether
* the RAMDAC palettes are bypassed. (Direct colour has
* palettes, true colour does not.)
*/
if (var->bits_per_pixel == 8)
cfb->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
else if (hw.ramdac & RAMDAC_BYPASS)
cfb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
else
cfb->fb.fix.visual = FB_VISUAL_DIRECTCOLOR;
cyber2000fb_set_timing(cfb, &hw);
cyber2000fb_update_start(cfb, var);
return 0;
}
/*
* Pan or Wrap the Display
*/
static int
cyber2000fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct cfb_info *cfb = (struct cfb_info *)info;
if (cyber2000fb_update_start(cfb, var))
return -EINVAL;
cfb->fb.var.xoffset = var->xoffset;
cfb->fb.var.yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP) {
cfb->fb.var.vmode |= FB_VMODE_YWRAP;
} else {
cfb->fb.var.vmode &= ~FB_VMODE_YWRAP;
}
return 0;
}
/*
* (Un)Blank the display.
*
* 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
*
* wms...Enable VESA DMPS compatible powerdown mode
* run "setterm -powersave powerdown" to take advantage
*/
static int cyber2000fb_blank(int blank, struct fb_info *info)
{
struct cfb_info *cfb = (struct cfb_info *)info;
unsigned int sync = 0;
int i;
switch (blank) {
case FB_BLANK_POWERDOWN: /* powerdown - both sync lines down */
sync = EXT_SYNC_CTL_VS_0 | EXT_SYNC_CTL_HS_0;