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/* $Id: cgfourteenfb.c,v 1.11 2001/09/19 00:04:33 davem Exp $
* cgfourteenfb.c: CGfourteen frame buffer driver
*
* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
* Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/selection.h>
#include <video/sbusfb.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <video/fbcon-cfb8.h>
#define CG14_MCR_INTENABLE_SHIFT 7
#define CG14_MCR_INTENABLE_MASK 0x80
#define CG14_MCR_VIDENABLE_SHIFT 6
#define CG14_MCR_VIDENABLE_MASK 0x40
#define CG14_MCR_PIXMODE_SHIFT 4
#define CG14_MCR_PIXMODE_MASK 0x30
#define CG14_MCR_TMR_SHIFT 2
#define CG14_MCR_TMR_MASK 0x0c
#define CG14_MCR_TMENABLE_SHIFT 1
#define CG14_MCR_TMENABLE_MASK 0x02
#define CG14_MCR_RESET_SHIFT 0
#define CG14_MCR_RESET_MASK 0x01
#define CG14_REV_REVISION_SHIFT 4
#define CG14_REV_REVISION_MASK 0xf0
#define CG14_REV_IMPL_SHIFT 0
#define CG14_REV_IMPL_MASK 0x0f
#define CG14_VBR_FRAMEBASE_SHIFT 12
#define CG14_VBR_FRAMEBASE_MASK 0x00fff000
#define CG14_VMCR1_SETUP_SHIFT 0
#define CG14_VMCR1_SETUP_MASK 0x000001ff
#define CG14_VMCR1_VCONFIG_SHIFT 9
#define CG14_VMCR1_VCONFIG_MASK 0x00000e00
#define CG14_VMCR2_REFRESH_SHIFT 0
#define CG14_VMCR2_REFRESH_MASK 0x00000001
#define CG14_VMCR2_TESTROWCNT_SHIFT 1
#define CG14_VMCR2_TESTROWCNT_MASK 0x00000002
#define CG14_VMCR2_FBCONFIG_SHIFT 2
#define CG14_VMCR2_FBCONFIG_MASK 0x0000000c
#define CG14_VCR_REFRESHREQ_SHIFT 0
#define CG14_VCR_REFRESHREQ_MASK 0x000003ff
#define CG14_VCR1_REFRESHENA_SHIFT 10
#define CG14_VCR1_REFRESHENA_MASK 0x00000400
#define CG14_VCA_CAD_SHIFT 0
#define CG14_VCA_CAD_MASK 0x000003ff
#define CG14_VCA_VERS_SHIFT 10
#define CG14_VCA_VERS_MASK 0x00000c00
#define CG14_VCA_RAMSPEED_SHIFT 12
#define CG14_VCA_RAMSPEED_MASK 0x00001000
#define CG14_VCA_8MB_SHIFT 13
#define CG14_VCA_8MB_MASK 0x00002000
#define CG14_MCR_PIXMODE_8 0
#define CG14_MCR_PIXMODE_16 2
#define CG14_MCR_PIXMODE_32 3
MODULE_LICENSE("GPL");
struct cg14_regs{
volatile u8 mcr; /* Master Control Reg */
volatile u8 ppr; /* Packed Pixel Reg */
volatile u8 tms[2]; /* Test Mode Status Regs */
volatile u8 msr; /* Master Status Reg */
volatile u8 fsr; /* Fault Status Reg */
volatile u8 rev; /* Revision & Impl */
volatile u8 ccr; /* Clock Control Reg */
volatile u32 tmr; /* Test Mode Read Back */
volatile u8 mod; /* Monitor Operation Data Reg */
volatile u8 acr; /* Aux Control */
u8 xxx0[6];
volatile u16 hct; /* Hor Counter */
volatile u16 vct; /* Vert Counter */
volatile u16 hbs; /* Hor Blank Start */
volatile u16 hbc; /* Hor Blank Clear */
volatile u16 hss; /* Hor Sync Start */
volatile u16 hsc; /* Hor Sync Clear */
volatile u16 csc; /* Composite Sync Clear */
volatile u16 vbs; /* Vert Blank Start */
volatile u16 vbc; /* Vert Blank Clear */
volatile u16 vss; /* Vert Sync Start */
volatile u16 vsc; /* Vert Sync Clear */
volatile u16 xcs;
volatile u16 xcc;
volatile u16 fsa; /* Fault Status Address */
volatile u16 adr; /* Address Registers */
u8 xxx1[0xce];
volatile u8 pcg[0x100]; /* Pixel Clock Generator */
volatile u32 vbr; /* Frame Base Row */
volatile u32 vmcr; /* VBC Master Control */
volatile u32 vcr; /* VBC refresh */
volatile u32 vca; /* VBC Config */
};
#define CG14_CCR_ENABLE 0x04
#define CG14_CCR_SELECT 0x02 /* HW/Full screen */
struct cg14_cursor {
volatile u32 cpl0[32]; /* Enable plane 0 */
volatile u32 cpl1[32]; /* Color selection plane */
volatile u8 ccr; /* Cursor Control Reg */
u8 xxx0[3];
volatile u16 cursx; /* Cursor x,y position */
volatile u16 cursy; /* Cursor x,y position */
volatile u32 color0;
volatile u32 color1;
u32 xxx1[0x1bc];
volatile u32 cpl0i[32]; /* Enable plane 0 autoinc */
volatile u32 cpl1i[32]; /* Color selection autoinc */
};
struct cg14_dac {
volatile u8 addr; /* Address Register */
u8 xxx0[255];
volatile u8 glut; /* Gamma table */
u8 xxx1[255];
volatile u8 select; /* Register Select */
u8 xxx2[255];
volatile u8 mode; /* Mode Register */
};
struct cg14_xlut{
volatile u8 x_xlut [256];
volatile u8 x_xlutd [256];
u8 xxx0[0x600];
volatile u8 x_xlut_inc [256];
volatile u8 x_xlutd_inc [256];
};
/* Color look up table (clut) */
/* Each one of these arrays hold the color lookup table (for 256
* colors) for each MDI page (I assume then there should be 4 MDI
* pages, I still wonder what they are. I have seen NeXTStep split
* the screen in four parts, while operating in 24 bits mode. Each
* integer holds 4 values: alpha value (transparency channel, thanks
* go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
*
* I currently use the clut instead of the Xlut
*/
struct cg14_clut {
u32 c_clut [256];
u32 c_clutd [256]; /* i wonder what the 'd' is for */
u32 c_clut_inc [256];
u32 c_clutd_inc [256];
};
static struct sbus_mmap_map cg14_mmap_map[] __initdata = {
{ CG14_REGS, 0x80000000, 0x1000 },
{ CG14_XLUT, 0x80003000, 0x1000 },
{ CG14_CLUT1, 0x80004000, 0x1000 },
{ CG14_CLUT2, 0x80005000, 0x1000 },
{ CG14_CLUT3, 0x80006000, 0x1000 },
{ CG3_MMAP_OFFSET -
0x7000, 0x80000000, 0x7000 },
{ CG3_MMAP_OFFSET, 0x00000000, SBUS_MMAP_FBSIZE(1) },
{ MDI_CURSOR_MAP, 0x80001000, 0x1000 },
{ MDI_CHUNKY_BGR_MAP, 0x01000000, 0x400000 },
{ MDI_PLANAR_X16_MAP, 0x02000000, 0x200000 },
{ MDI_PLANAR_C16_MAP, 0x02800000, 0x200000 },
{ MDI_PLANAR_X32_MAP, 0x03000000, 0x100000 },
{ MDI_PLANAR_B32_MAP, 0x03400000, 0x100000 },
{ MDI_PLANAR_G32_MAP, 0x03800000, 0x100000 },
{ MDI_PLANAR_R32_MAP, 0x03c00000, 0x100000 },
{ 0, 0, 0 }
};
static void cg14_loadcmap (struct fb_info_sbusfb *fb, struct display *p,
int index, int count)
{
struct cg14_clut *clut = fb->s.cg14.clut;
unsigned long flags;
spin_lock_irqsave(&fb->lock, flags);
for (; count--; index++) {
u32 val;
val = ((fb->color_map CM(index,2) << 16) |
(fb->color_map CM(index,1) << 8) |
(fb->color_map CM(index,0)));
sbus_writel(val, &clut->c_clut[index]);
}
spin_unlock_irqrestore(&fb->lock, flags);
}
static void cg14_margins (struct fb_info_sbusfb *fb, struct display *p,
int x_margin, int y_margin)
{
p->screen_base += (y_margin - fb->y_margin) *
p->line_length + (x_margin - fb->x_margin);
}
static void cg14_setcursormap (struct fb_info_sbusfb *fb, u8 *red, u8 *green, u8 *blue)
{
struct cg14_cursor *cur = fb->s.cg14.cursor;
unsigned long flags;
spin_lock_irqsave(&fb->lock, flags);
sbus_writel(((red[0]) | (green[0] << 8) | (blue[0] << 16)), &cur->color0);
sbus_writel(((red[1]) | (green[1] << 8) | (blue[1] << 16)), &cur->color1);
spin_unlock_irqrestore(&fb->lock, flags);
}
/* Set cursor shape */
static void cg14_setcurshape (struct fb_info_sbusfb *fb)
{
struct cg14_cursor *cur = fb->s.cg14.cursor;
unsigned long flags;
int i;
spin_lock_irqsave(&fb->lock, flags);
for (i = 0; i < 32; i++){
sbus_writel(fb->cursor.bits[0][i], &cur->cpl0[i]);
sbus_writel(fb->cursor.bits[1][i], &cur->cpl1[i]);
}
spin_unlock_irqrestore(&fb->lock, flags);
}
/* Load cursor information */
static void cg14_setcursor (struct fb_info_sbusfb *fb)
{
struct cg_cursor *c = &fb->cursor;
struct cg14_cursor *cur = fb->s.cg14.cursor;
unsigned long flags;
spin_lock_irqsave(&fb->lock, flags);
if (c->enable) {
u8 tmp = sbus_readb(&cur->ccr);
tmp |= CG14_CCR_ENABLE;
sbus_writeb(tmp, &cur->ccr);
} else {
u8 tmp = sbus_readb(&cur->ccr);
tmp &= ~CG14_CCR_ENABLE;
sbus_writeb(tmp, &cur->ccr);
}
sbus_writew(((c->cpos.fbx - c->chot.fbx) & 0xfff), &cur->cursx);
sbus_writew(((c->cpos.fby - c->chot.fby) & 0xfff), &cur->cursy);
spin_unlock_irqrestore(&fb->lock, flags);
}
static void cg14_switch_from_graph (struct fb_info_sbusfb *fb)
{
unsigned long flags;
spin_lock_irqsave(&fb->lock, flags);
/* Set the 8-bpp mode */
if (fb->open && fb->mmaped){
volatile char *mcr = &fb->s.cg14.regs->mcr;
char tmp;
fb->s.cg14.mode = 8;
tmp = sbus_readb(mcr);
tmp &= ~(CG14_MCR_PIXMODE_MASK);
sbus_writeb(tmp, mcr);
}
spin_unlock_irqrestore(&fb->lock, flags);
}
static void cg14_reset (struct fb_info_sbusfb *fb)
{
volatile char *mcr = &fb->s.cg14.regs->mcr;
unsigned long flags;
char tmp;
spin_lock_irqsave(&fb->lock, flags);
tmp = sbus_readb(mcr);
tmp &= ~(CG14_MCR_PIXMODE_MASK);
sbus_writeb(tmp, mcr);
spin_unlock_irqrestore(&fb->lock, flags);
}
static int cg14_ioctl (struct fb_info_sbusfb *fb, unsigned int cmd, unsigned long arg)
{
volatile char *mcr = &fb->s.cg14.regs->mcr;
struct mdi_cfginfo *mdii;
unsigned long flags;
int mode, ret = 0;
char tmp;
switch (cmd) {
case MDI_RESET:
spin_lock_irqsave(&fb->lock, flags);
tmp = sbus_readb(mcr);
tmp &= ~CG14_MCR_PIXMODE_MASK;
sbus_writeb(tmp, mcr);
spin_unlock_irqrestore(&fb->lock, flags);
break;
case MDI_GET_CFGINFO:
mdii = (struct mdi_cfginfo *)arg;
if (put_user(FBTYPE_MDICOLOR, &mdii->mdi_type) ||
__put_user(fb->type.fb_height, &mdii->mdi_height) ||
__put_user(fb->type.fb_width, &mdii->mdi_width) ||
__put_user(fb->s.cg14.mode, &mdii->mdi_mode) ||
__put_user(72, &mdii->mdi_pixfreq) || /* FIXME */
__put_user(fb->s.cg14.ramsize, &mdii->mdi_size))
return -EFAULT;
break;
case MDI_SET_PIXELMODE:
if (get_user(mode, (int *)arg))
return -EFAULT;
spin_lock_irqsave(&fb->lock, flags);
tmp = sbus_readb(mcr);
switch (mode){
case MDI_32_PIX:
tmp = (tmp & ~CG14_MCR_PIXMODE_MASK) |
(CG14_MCR_PIXMODE_32 << CG14_MCR_PIXMODE_SHIFT);
break;
case MDI_16_PIX:
tmp = (tmp & ~CG14_MCR_PIXMODE_MASK) | 0x20;
break;
case MDI_8_PIX:
tmp = (tmp & ~CG14_MCR_PIXMODE_MASK);
break;
default:
ret = -ENOSYS;
break;
};
if (ret == 0) {
sbus_writeb(tmp, mcr);
fb->s.cg14.mode = mode;
}
spin_unlock_irqrestore(&fb->lock, flags);
break;
default:
ret = -EINVAL;
};
return ret;
}
static unsigned long __init get_phys(unsigned long addr)
{
return __get_phys(addr);
}
static int __init get_iospace(unsigned long addr)
{
return __get_iospace(addr);
}
static char idstring[60] __initdata = { 0 };
char __init *cgfourteenfb_init(struct fb_info_sbusfb *fb)
{
struct fb_fix_screeninfo *fix = &fb->fix;
struct display *disp = &fb->disp;
struct fbtype *type = &fb->type;
unsigned long rphys, phys;
u32 bases[6];
int is_8mb, i;
#ifndef FBCON_HAS_CFB8
return NULL;
#endif
prom_getproperty (fb->prom_node, "address", (char *) &bases[0], 8);
if (!bases[0]) {
printk("cg14 not mmaped\n");
return NULL;
}
if (get_iospace(bases[0]) != get_iospace(bases[1])) {
printk("Ugh. cg14 iospaces don't match\n");
return NULL;
}
fb->physbase = phys = get_phys(bases[1]);
rphys = get_phys(bases[0]);
fb->iospace = get_iospace(bases[0]);
fb->s.cg14.regs = (struct cg14_regs *)(unsigned long)bases[0];
fb->s.cg14.clut = (void *)((unsigned long)bases[0]+CG14_CLUT1);
fb->s.cg14.cursor = (void *)((unsigned long)bases[0]+CG14_CURSORREGS);
disp->screen_base = (char *)bases[1];
/* CG14_VCA_8MB_MASK is not correctly set on the 501-2482
* VSIMM, so we read the memory size from the PROM
*/
prom_getproperty(fb->prom_node, "reg", (char *) &bases[0], 24);
is_8mb = bases[5] == 0x800000;
fb->mmap_map = kmalloc(sizeof(cg14_mmap_map), GFP_KERNEL);
if (!fb->mmap_map)
return NULL;
for (i = 0; ; i++) {
fb->mmap_map[i].voff = cg14_mmap_map[i].voff;
fb->mmap_map[i].poff = (cg14_mmap_map[i].poff & 0x80000000) ?
(cg14_mmap_map[i].poff & 0x7fffffff) + rphys - phys :
cg14_mmap_map[i].poff;
fb->mmap_map[i].size = cg14_mmap_map[i].size;
if (is_8mb && fb->mmap_map[i].size >= 0x100000 &&
fb->mmap_map[i].size <= 0x400000)
fb->mmap_map[i].size <<= 1;
if (!cg14_mmap_map[i].size)
break;
}
strcpy(fb->info.modename, "CGfourteen");
strcpy(fix->id, "CGfourteen");
fix->line_length = fb->var.xres_virtual;
fix->accel = FB_ACCEL_SUN_CG14;
disp->scrollmode = SCROLL_YREDRAW;
disp->screen_base += fix->line_length * fb->y_margin + fb->x_margin;
fb->dispsw = fbcon_cfb8;
type->fb_depth = 24;
fb->emulations[1] = FBTYPE_SUN3COLOR;
fb->margins = cg14_margins;
fb->loadcmap = cg14_loadcmap;
fb->setcursor = cg14_setcursor;
fb->setcursormap = cg14_setcursormap;
fb->setcurshape = cg14_setcurshape;
fb->reset = cg14_reset;
fb->switch_from_graph = cg14_switch_from_graph;
fb->ioctl = cg14_ioctl;
fb->s.cg14.mode = 8;
fb->s.cg14.ramsize = (is_8mb) ? 0x800000 : 0x400000;
cg14_reset(fb);
sprintf(idstring, "cgfourteen at %x.%08lx, %dMB, rev=%d, impl=%d", fb->iospace, phys,
is_8mb ? 8 : 4, fb->s.cg14.regs->rev >> 4, fb->s.cg14.regs->rev & 0xf);
return idstring;
}
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