![Benjamin Herrenschmidt](/assets/img/avatar_default.png)
This patch fixes a few issues in offb: - A test was inverted causing the palette hack to never work (no device node was passed down to the init function) - Some cards seem to have their assigned-addresses property in a random order, thus we need to try using of_get_pci_address() first, which will fail if it's not a PCI device, and fallback to of_get_address() in that case. of_get_pci_address() properly parsees assigned-addresses to test the BAR number and thus will get it right whatever the order is. - Some cards (like GXT4500) provide a linebytes of 0xffffffff in the device-tree which does no good. This patch handles that by using the screen width when that happens. (Also fixes btext.c while at it). - Add detection of the GXT4500 in addition to the GXT2000 for the palette hacks (we use the same hack, palette is linear in register space at offset 0x6000). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
550 lines
14 KiB
C
550 lines
14 KiB
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/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.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 <linux/pci.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
|
|
*/
|
|
|
|
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 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,
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
int i, depth;
|
|
u32 *pal = info->pseudo_palette;
|
|
|
|
depth = info->var.bits_per_pixel;
|
|
if (depth == 16)
|
|
depth = (info->var.green.length == 5) ? 15 : 16;
|
|
|
|
if (regno > 255 ||
|
|
(depth == 16 && regno > 63) ||
|
|
(depth == 15 && regno > 31))
|
|
return 1;
|
|
|
|
if (regno < 16) {
|
|
switch (depth) {
|
|
case 15:
|
|
pal[regno] = (regno << 10) | (regno << 5) | regno;
|
|
break;
|
|
case 16:
|
|
pal[regno] = (regno << 11) | (regno << 5) | regno;
|
|
break;
|
|
case 24:
|
|
pal[regno] = (regno << 16) | (regno << 8) | regno;
|
|
break;
|
|
case 32:
|
|
i = (regno << 8) | regno;
|
|
pal[regno] = (i << 16) | i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
red >>= 8;
|
|
green >>= 8;
|
|
blue >>= 8;
|
|
|
|
if (!par->cmap_adr)
|
|
return 0;
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
static void __iomem *offb_map_reg(struct device_node *np, int index,
|
|
unsigned long offset, unsigned long size)
|
|
{
|
|
const u32 *addrp;
|
|
u64 asize, taddr;
|
|
unsigned int flags;
|
|
|
|
addrp = of_get_pci_address(np, index, &asize, &flags);
|
|
if (addrp == NULL)
|
|
addrp = of_get_address(np, index, &asize, &flags);
|
|
if (addrp == NULL)
|
|
return NULL;
|
|
if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
|
|
return NULL;
|
|
if ((offset + size) > asize)
|
|
return NULL;
|
|
taddr = of_translate_address(np, addrp);
|
|
if (taddr == OF_BAD_ADDR)
|
|
return NULL;
|
|
return ioremap(taddr + offset, size);
|
|
}
|
|
|
|
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 + 7) / 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 != 15 && 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) {
|
|
if (dp && !strncmp(name, "ATY,Rage128", 11)) {
|
|
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
|
|
if (par->cmap_adr)
|
|
par->cmap_type = cmap_r128;
|
|
} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
|
|
|| !strncmp(name, "ATY,RageM3p12A", 14))) {
|
|
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
|
|
if (par->cmap_adr)
|
|
par->cmap_type = cmap_M3A;
|
|
} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
|
|
par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
|
|
if (par->cmap_adr)
|
|
par->cmap_type = cmap_M3B;
|
|
} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
|
|
par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
|
|
if (par->cmap_adr)
|
|
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 (dp && (device_is_compatible(dp, "pci1014,b7") ||
|
|
device_is_compatible(dp, "pci1014,21c"))) {
|
|
par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
|
|
if (par->cmap_adr)
|
|
par->cmap_type = cmap_gxt2000;
|
|
}
|
|
fix->visual = (par->cmap_type != cmap_unknown) ?
|
|
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
|
|
} else
|
|
fix->visual = FB_VISUAL_TRUECOLOR;
|
|
|
|
var->xoffset = var->yoffset = 0;
|
|
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 15: /* 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 16: /* RGB 565 */
|
|
var->bits_per_pixel = 16;
|
|
var->red.offset = 11;
|
|
var->red.length = 5;
|
|
var->green.offset = 5;
|
|
var->green.length = 6;
|
|
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);
|
|
}
|
|
|
|
|
|
static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
|
|
{
|
|
unsigned int len;
|
|
int i, width = 640, height = 480, depth = 8, pitch = 640;
|
|
unsigned int flags, rsize, addr_prop = 0;
|
|
unsigned long max_size = 0;
|
|
u64 rstart, address = OF_BAD_ADDR;
|
|
const u32 *pp, *addrp, *up;
|
|
u64 asize;
|
|
|
|
pp = get_property(dp, "linux,bootx-depth", &len);
|
|
if (pp == NULL)
|
|
pp = get_property(dp, "depth", &len);
|
|
if (pp && len == sizeof(u32))
|
|
depth = *pp;
|
|
|
|
pp = get_property(dp, "linux,bootx-width", &len);
|
|
if (pp == NULL)
|
|
pp = get_property(dp, "width", &len);
|
|
if (pp && len == sizeof(u32))
|
|
width = *pp;
|
|
|
|
pp = get_property(dp, "linux,bootx-height", &len);
|
|
if (pp == NULL)
|
|
pp = get_property(dp, "height", &len);
|
|
if (pp && len == sizeof(u32))
|
|
height = *pp;
|
|
|
|
pp = get_property(dp, "linux,bootx-linebytes", &len);
|
|
if (pp == NULL)
|
|
pp = get_property(dp, "linebytes", &len);
|
|
if (pp && len == sizeof(u32) && (*pp != 0xffffffffu))
|
|
pitch = *pp;
|
|
else
|
|
pitch = width * ((depth + 7) / 8);
|
|
|
|
rsize = (unsigned long)pitch * (unsigned long)height;
|
|
|
|
/* Ok, now we try to figure out the address of the framebuffer.
|
|
*
|
|
* Unfortunately, Open Firmware doesn't provide a standard way to do
|
|
* so. All we can do is a dodgy heuristic that happens to work in
|
|
* practice. On most machines, the "address" property contains what
|
|
* we need, though not on Matrox cards found in IBM machines. What I've
|
|
* found that appears to give good results is to go through the PCI
|
|
* ranges and pick one that is both big enough and if possible encloses
|
|
* the "address" property. If none match, we pick the biggest
|
|
*/
|
|
up = get_property(dp, "linux,bootx-addr", &len);
|
|
if (up == NULL)
|
|
up = get_property(dp, "address", &len);
|
|
if (up && len == sizeof(u32))
|
|
addr_prop = *up;
|
|
|
|
/* Hack for when BootX is passing us */
|
|
if (no_real_node)
|
|
goto skip_addr;
|
|
|
|
for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
|
|
!= NULL; i++) {
|
|
int match_addrp = 0;
|
|
|
|
if (!(flags & IORESOURCE_MEM))
|
|
continue;
|
|
if (asize < rsize)
|
|
continue;
|
|
rstart = of_translate_address(dp, addrp);
|
|
if (rstart == OF_BAD_ADDR)
|
|
continue;
|
|
if (addr_prop && (rstart <= addr_prop) &&
|
|
((rstart + asize) >= (addr_prop + rsize)))
|
|
match_addrp = 1;
|
|
if (match_addrp) {
|
|
address = addr_prop;
|
|
break;
|
|
}
|
|
if (rsize > max_size) {
|
|
max_size = rsize;
|
|
address = OF_BAD_ADDR;
|
|
}
|
|
|
|
if (address == OF_BAD_ADDR)
|
|
address = rstart;
|
|
}
|
|
skip_addr:
|
|
if (address == OF_BAD_ADDR && addr_prop)
|
|
address = (u64)addr_prop;
|
|
if (address != OF_BAD_ADDR) {
|
|
/* kludge for valkyrie */
|
|
if (strcmp(dp->name, "valkyrie") == 0)
|
|
address += 0x1000;
|
|
offb_init_fb(no_real_node ? "bootx" : dp->name,
|
|
no_real_node ? "display" : dp->full_name,
|
|
width, height, depth, pitch, address,
|
|
no_real_node ? NULL : dp);
|
|
}
|
|
}
|
|
|
|
static int __init offb_init(void)
|
|
{
|
|
struct device_node *dp = NULL, *boot_disp = NULL;
|
|
|
|
if (fb_get_options("offb", NULL))
|
|
return -ENODEV;
|
|
|
|
/* Check if we have a MacOS display without a node spec */
|
|
if (get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) {
|
|
/* The old code tried to work out which node was the MacOS
|
|
* display based on the address. I'm dropping that since the
|
|
* lack of a node spec only happens with old BootX versions
|
|
* (users can update) and with this code, they'll still get
|
|
* a display (just not the palette hacks).
|
|
*/
|
|
offb_init_nodriver(of_chosen, 1);
|
|
}
|
|
|
|
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, 0);
|
|
}
|
|
}
|
|
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, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
module_init(offb_init);
|
|
MODULE_LICENSE("GPL");
|