offb.c
/*
* linux/drivers/video/offb.c -- Open Firmware based frame buffer device
*
* Copyright (C) 1997 Geert Uytterhoeven
*
* This driver is partly based on the PowerMac console driver:
*
* Copyright (C) 1996 Paul Mackerras
*
* 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.
*/
#include <linux/config.h>
#include <linux/module.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/ioport.h>
#include <asm/io.h>
#include <asm/prom.h>
#ifdef CONFIG_PPC64
#include <asm/pci-bridge.h>
#endif
#ifdef CONFIG_PPC32
#include <asm/bootx.h>
#endif
#include "macmodes.h"
/* Supported palette hacks */
enum {
cmap_unknown,
cmap_m64, /* ATI Mach64 */
cmap_r128, /* ATI Rage128 */
cmap_M3A, /* ATI Rage Mobility M3 Head A */
cmap_M3B, /* ATI Rage Mobility M3 Head B */
cmap_radeon, /* ATI Radeon */
cmap_gxt2000, /* IBM GXT2000 */
};
struct offb_par {
volatile void __iomem *cmap_adr;
volatile void __iomem *cmap_data;
int cmap_type;
int blanked;
};
struct offb_par default_par;
/*
* Interface used by the world
*/
int offb_init(void);
static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static int offb_blank(int blank, struct fb_info *info);
#ifdef CONFIG_PPC32
extern boot_infos_t *boot_infos;
#endif
static void offb_init_nodriver(struct device_node *);
static void offb_init_fb(const char *name, const char *full_name,
int width, int height, int depth, int pitch,
unsigned long address, struct device_node *dp);
static struct fb_ops offb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = offb_setcolreg,
.fb_blank = offb_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_cursor = soft_cursor,
};
/*
* Set a single color register. The values supplied are already
* rounded down to the hardware's capabilities (according to the
* entries in the var structure). Return != 0 for invalid regno.
*/
static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
struct offb_par *par = (struct offb_par *) info->par;
if (!par->cmap_adr || regno > 255)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
switch (par->cmap_type) {
case cmap_m64:
writeb(regno, par->cmap_adr);
writeb(red, par->cmap_data);
writeb(green, par->cmap_data);
writeb(blue, par->cmap_data);
break;
case cmap_M3A:
/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
out_le32(par->cmap_adr + 0x58,
in_le32(par->cmap_adr + 0x58) & ~0x20);
case cmap_r128:
/* Set palette index & data */
out_8(par->cmap_adr + 0xb0, regno);
out_le32(par->cmap_adr + 0xb4,
(red << 16 | green << 8 | blue));
break;
case cmap_M3B:
/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
out_le32(par->cmap_adr + 0x58,
in_le32(par->cmap_adr + 0x58) | 0x20);
/* Set palette index & data */
out_8(par->cmap_adr + 0xb0, regno);
out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
break;
case cmap_radeon:
/* Set palette index & data (could be smarter) */
out_8(par->cmap_adr + 0xb0, regno);
out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
break;
case cmap_gxt2000:
out_le32((unsigned __iomem *) par->cmap_adr + regno,
(red << 16 | green << 8 | blue));
break;
}
if (regno < 16)
switch (info->var.bits_per_pixel) {
case 16:
((u16 *) (info->pseudo_palette))[regno] =
(regno << 10) | (regno << 5) | regno;
break;
case 32:
{
int i = (regno << 8) | regno;
((u32 *) (info->pseudo_palette))[regno] =
(i << 16) | i;
break;
}
}
return 0;
}
/*
* Blank the display.
*/
static int offb_blank(int blank, struct fb_info *info)
{
struct offb_par *par = (struct offb_par *) info->par;
int i, j;
if (!par->cmap_adr)
return 0;
if (!par->blanked)
if (!blank)
return 0;
par->blanked = blank;
if (blank)
for (i = 0; i < 256; i++) {
switch (par->cmap_type) {
case cmap_m64:
writeb(i, par->cmap_adr);
for (j = 0; j < 3; j++)
writeb(0, par->cmap_data);
break;
case cmap_M3A:
/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
out_le32(par->cmap_adr + 0x58,
in_le32(par->cmap_adr + 0x58) & ~0x20);
case cmap_r128:
/* Set palette index & data */
out_8(par->cmap_adr + 0xb0, i);
out_le32(par->cmap_adr + 0xb4, 0);
break;
case cmap_M3B:
/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
out_le32(par->cmap_adr + 0x58,
in_le32(par->cmap_adr + 0x58) | 0x20);
/* Set palette index & data */
out_8(par->cmap_adr + 0xb0, i);
out_le32(par->cmap_adr + 0xb4, 0);
break;
case cmap_radeon:
out_8(par->cmap_adr + 0xb0, i);
out_le32(par->cmap_adr + 0xb4, 0);
break;
case cmap_gxt2000:
out_le32((unsigned __iomem *) par->cmap_adr + i,
0);
break;
}
} else
fb_set_cmap(&info->cmap, info);
return 0;
}
/*
* Initialisation
*/
int __init offb_init(void)
{
struct device_node *dp = NULL, *boot_disp = NULL;
#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
struct device_node *macos_display = NULL;
#endif
if (fb_get_options("offb", NULL))
return -ENODEV;
#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
/* If we're booted from BootX... */
if (boot_infos != 0) {
unsigned long addr =
(unsigned long) boot_infos->dispDeviceBase;
/* find the device node corresponding to the macos display */
while ((dp = of_find_node_by_type(dp, "display"))) {
int i;
/*
* Grrr... It looks like the MacOS ATI driver
* munges the assigned-addresses property (but
* the AAPL,address value is OK).
*/
if (strncmp(dp->name, "ATY,", 4) == 0
&& dp->n_addrs == 1) {
unsigned int *ap =
(unsigned int *) get_property(dp,
"AAPL,address",
NULL);
if (ap != NULL) {
dp->addrs[0].address = *ap;
dp->addrs[0].size = 0x01000000;
}
}
/*
* The LTPro on the Lombard powerbook has no addresses
* on the display nodes, they are on their parent.
*/
if (dp->n_addrs == 0
&& device_is_compatible(dp, "ATY,264LTPro")) {
int na;
unsigned int *ap = (unsigned int *)
get_property(dp, "AAPL,address", &na);
if (ap != 0)
for (na /= sizeof(unsigned int);
na > 0; --na, ++ap)
if (*ap <= addr
&& addr <
*ap + 0x1000000)
goto foundit;
}
/*
* See if the display address is in one of the address
* ranges for this display.
*/
for (i = 0; i < dp->n_addrs; ++i) {
if (dp->addrs[i].address <= addr
&& addr <
dp->addrs[i].address +
dp->addrs[i].size)
break;
}
if (i < dp->n_addrs) {
foundit:
printk(KERN_INFO "MacOS display is %s\n",
dp->full_name);
macos_display = dp;
break;
}
}
/* initialize it */
offb_init_fb(macos_display ? macos_display->
name : "MacOS display",
macos_display ? macos_display->
full_name : "MacOS display",
boot_infos->dispDeviceRect[2],
boot_infos->dispDeviceRect[3],
boot_infos->dispDeviceDepth,
boot_infos->dispDeviceRowBytes, addr, NULL);
}
#endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
if (get_property(dp, "linux,opened", NULL) &&
get_property(dp, "linux,boot-display", NULL)) {
boot_disp = dp;
offb_init_nodriver(dp);
}
}
for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
if (get_property(dp, "linux,opened", NULL) &&
dp != boot_disp)
offb_init_nodriver(dp);
}
return 0;
}
static void __init offb_init_nodriver(struct device_node *dp)
{
int *pp, i;
unsigned int len;
int width = 640, height = 480, depth = 8, pitch;
unsigned *up;
unsigned long address;
if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
&& len == sizeof(int))
depth = *pp;
if ((pp = (int *) get_property(dp, "width", &len)) != NULL
&& len == sizeof(int))
width = *pp;
if ((pp = (int *) get_property(dp, "height", &len)) != NULL
&& len == sizeof(int))
height = *pp;
if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
&& len == sizeof(int)) {
pitch = *pp;
if (pitch == 1)
pitch = 0x1000;
} else
pitch = width;
if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
&& len == sizeof(unsigned))
address = (u_long) * up;
else {
for (i = 0; i < dp->n_addrs; ++i)
if (dp->addrs[i].size >=
pitch * height * depth / 8)
break;
if (i >= dp->n_addrs) {
printk(KERN_ERR
"no framebuffer address found for %s\n",
dp->full_name);
return;
}
address = (u_long) dp->addrs[i].address;
#ifdef CONFIG_PPC64
address += ((struct pci_dn *)dp->data)->phb->pci_mem_offset;
#endif
/* kludge for valkyrie */
if (strcmp(dp->name, "valkyrie") == 0)
address += 0x1000;
}
offb_init_fb(dp->name, dp->full_name, width, height, depth,
pitch, address, dp);
}
static void __init offb_init_fb(const char *name, const char *full_name,
int width, int height, int depth,
int pitch, unsigned long address,
struct device_node *dp)
{
unsigned long res_size = pitch * height * depth / 8;
struct offb_par *par = &default_par;
unsigned long res_start = address;
struct fb_fix_screeninfo *fix;
struct fb_var_screeninfo *var;
struct fb_info *info;
int size;
if (!request_mem_region(res_start, res_size, "offb"))
return;
printk(KERN_INFO
"Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
width, height, name, address, depth, pitch);
if (depth != 8 && depth != 16 && depth != 32) {
printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
depth);
release_mem_region(res_start, res_size);
return;
}
size = sizeof(struct fb_info) + sizeof(u32) * 17;
info = kmalloc(size, GFP_ATOMIC);
if (info == 0) {
release_mem_region(res_start, res_size);
return;
}
memset(info, 0, size);
fix = &info->fix;
var = &info->var;
strcpy(fix->id, "OFfb ");
strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
fix->id[sizeof(fix->id) - 1] = '\0';
var->xres = var->xres_virtual = width;
var->yres = var->yres_virtual = height;
fix->line_length = pitch;
fix->smem_start = address;
fix->smem_len = pitch * height;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
par->cmap_type = cmap_unknown;
if (depth == 8) {
/* XXX kludge for ati */
if (dp && !strncmp(name, "ATY,Rage128", 11)) {
unsigned long regbase = dp->addrs[2].address;
par->cmap_adr = ioremap(regbase, 0x1FFF);
par->cmap_type = cmap_r128;
} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
|| !strncmp(name, "ATY,RageM3p12A", 14))) {
unsigned long regbase =
dp->parent->addrs[2].address;
par->cmap_adr = ioremap(regbase, 0x1FFF);
par->cmap_type = cmap_M3A;
} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
unsigned long regbase =
dp->parent->addrs[2].address;
par->cmap_adr = ioremap(regbase, 0x1FFF);
par->cmap_type = cmap_M3B;
} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
unsigned long regbase = dp->addrs[1].address;
par->cmap_adr = ioremap(regbase, 0x1FFF);
par->cmap_type = cmap_radeon;
} else if (!strncmp(name, "ATY,", 4)) {
unsigned long base = address & 0xff000000UL;
par->cmap_adr =
ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
par->cmap_data = par->cmap_adr + 1;
par->cmap_type = cmap_m64;
} else if (device_is_compatible(dp, "pci1014,b7")) {
unsigned long regbase = dp->addrs[0].address;
par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
par->cmap_type = cmap_gxt2000;
}
fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
: FB_VISUAL_STATIC_PSEUDOCOLOR;
} else
fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
: */ FB_VISUAL_TRUECOLOR;
var->xoffset = var->yoffset = 0;
var->bits_per_pixel = depth;
switch (depth) {
case 8:
var->bits_per_pixel = 8;
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 0;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 16: /* RGB 555 */
var->bits_per_pixel = 16;
var->red.offset = 10;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 5;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 32: /* RGB 888 */
var->bits_per_pixel = 32;
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 24;
var->transp.length = 8;
break;
}
var->red.msb_right = var->green.msb_right = var->blue.msb_right =
var->transp.msb_right = 0;
var->grayscale = 0;
var->nonstd = 0;
var->activate = 0;
var->height = var->width = -1;
var->pixclock = 10000;
var->left_margin = var->right_margin = 16;
var->upper_margin = var->lower_margin = 16;
var->hsync_len = var->vsync_len = 8;
var->sync = 0;
var->vmode = FB_VMODE_NONINTERLACED;
info->fbops = &offb_ops;
info->screen_base = ioremap(address, fix->smem_len);
info->par = par;
info->pseudo_palette = (void *) (info + 1);
info->flags = FBINFO_DEFAULT;
fb_alloc_cmap(&info->cmap, 256, 0);
if (register_framebuffer(info) < 0) {
kfree(info);
release_mem_region(res_start, res_size);
return;
}
printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
info->node, full_name);
}
module_init(offb_init);
MODULE_LICENSE("GPL");
