- 根目录:
- drivers
- video
- 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/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.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>
#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_simple, /* 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 */
cmap_avivo, /* ATI R5xx */
cmap_qemu, /* qemu vga */
};
struct offb_par {
volatile void __iomem *cmap_adr;
volatile void __iomem *cmap_data;
int cmap_type;
int blanked;
};
struct offb_par default_par;
#ifdef CONFIG_PPC32
extern boot_infos_t *boot_infos;
#endif
/* Definitions used by the Avivo palette hack */
#define AVIVO_DC_LUT_RW_SELECT 0x6480
#define AVIVO_DC_LUT_RW_MODE 0x6484
#define AVIVO_DC_LUT_RW_INDEX 0x6488
#define AVIVO_DC_LUT_SEQ_COLOR 0x648c
#define AVIVO_DC_LUT_PWL_DATA 0x6490
#define AVIVO_DC_LUT_30_COLOR 0x6494
#define AVIVO_DC_LUT_READ_PIPE_SELECT 0x6498
#define AVIVO_DC_LUT_WRITE_EN_MASK 0x649c
#define AVIVO_DC_LUT_AUTOFILL 0x64a0
#define AVIVO_DC_LUTA_CONTROL 0x64c0
#define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE 0x64c4
#define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN 0x64c8
#define AVIVO_DC_LUTA_BLACK_OFFSET_RED 0x64cc
#define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE 0x64d0
#define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN 0x64d4
#define AVIVO_DC_LUTA_WHITE_OFFSET_RED 0x64d8
#define AVIVO_DC_LUTB_CONTROL 0x6cc0
#define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE 0x6cc4
#define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN 0x6cc8
#define AVIVO_DC_LUTB_BLACK_OFFSET_RED 0x6ccc
#define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE 0x6cd0
#define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4
#define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8
/*
* 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 (info->fix.visual == FB_VISUAL_TRUECOLOR) {
u32 *pal = info->pseudo_palette;
u32 cr = red >> (16 - info->var.red.length);
u32 cg = green >> (16 - info->var.green.length);
u32 cb = blue >> (16 - info->var.blue.length);
u32 value;
if (regno >= 16)
return -EINVAL;
value = (cr << info->var.red.offset) |
(cg << info->var.green.offset) |
(cb << info->var.blue.offset);
if (info->var.transp.length > 0) {
u32 mask = (1 << info->var.transp.length) - 1;
mask <<= info->var.transp.offset;
value |= mask;
}
pal[regno] = value;
return 0;
}
if (regno > 255)
return -EINVAL;
red >>= 8;
green >>= 8;
blue >>= 8;
if (!par->cmap_adr)
return 0;
switch (par->cmap_type) {
case cmap_simple:
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;
case cmap_avivo:
/* Write to both LUTs for now */
writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
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_simple:
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;
case cmap_avivo:
writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
break;
}
} else
fb_set_cmap(&info->cmap, info);
return 0;
}
static int offb_set_par(struct fb_info *info)
{
struct offb_par *par = (struct offb_par *) info->par;
/* On avivo, initialize palette control */
if (par->cmap_type == cmap_avivo) {
writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL);
writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE);
writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN);
writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN);
writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN);
writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED);
writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
}
return 0;
}
static void offb_destroy(struct fb_info *info)
{
if (info->screen_base)
iounmap(info->screen_base);
release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
framebuffer_release(info);
}
static struct fb_ops offb_ops = {
.owner = THIS_MODULE,
.fb_destroy = offb_destroy,
.fb_setcolreg = offb_setcolreg,
.fb_set_par = offb_set_par,
.fb_blank = offb_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
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 offb_init_palette_hacks(struct fb_info *info, struct device_node *dp,
const char *name, unsigned long address)
{
struct offb_par *par = (struct offb_par *) info->par;
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_simple;
} else if (dp && (of_device_is_compatible(dp, "pci1014,b7") ||
of_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;
} else if (dp && !strncmp(name, "vga,Display-", 12)) {
/* Look for AVIVO initialized by SLOF */
struct device_node *pciparent = of_get_parent(dp);
const u32 *vid, *did;
vid = of_get_property(pciparent, "vendor-id", NULL);
did = of_get_property(pciparent, "device-id", NULL);
/* This will match most R5xx */
if (vid && did && *vid == 0x1002 &&
((*did >= 0x7100 && *did < 0x7800) ||
(*did >= 0x9400))) {
par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000);
if (par->cmap_adr)
par->cmap_type = cmap_avivo;
}
of_node_put(pciparent);
} else if (dp && of_device_is_compatible(dp, "qemu,std-vga")) {
const u32 io_of_addr[3] = { 0x01000000, 0x0, 0x0 };
u64 io_addr = of_translate_address(dp, io_of_addr);
if (io_addr != OF_BAD_ADDR) {
par->cmap_adr = ioremap(io_addr + 0x3c8, 2);
if (par->cmap_adr) {
par->cmap_type = cmap_simple;
par->cmap_data = par->cmap_adr + 1;
}
}
}
info->fix.visual = (par->cmap_type != cmap_unknown) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
}
static void __init offb_init_fb(const char *name, const char *full_name,
int width, int height, int depth,
int pitch, unsigned long address,
int foreign_endian, struct device_node *dp)
{
unsigned long res_size = pitch * height;
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;
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;
}
info = framebuffer_alloc(sizeof(u32) * 16, NULL);
if (info == 0) {
release_mem_region(res_start, res_size);
return;
}
fix = &info->fix;
var = &info->var;
info->par = par;
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)
offb_init_palette_hacks(info, dp, name, address);
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;
/* set offb aperture size for generic probing */
info->apertures = alloc_apertures(1);
if (!info->apertures)
goto out_aper;
info->apertures->ranges[0].base = address;
info->apertures->ranges[0].size = fix->smem_len;
info->fbops = &offb_ops;
info->screen_base = ioremap(address, fix->smem_len);
info->pseudo_palette = (void *) (info + 1);
info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian;
fb_alloc_cmap(&info->cmap, 256, 0);
if (register_framebuffer(info) < 0)
goto out_err;
printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
info->node, full_name);
return;
out_err:
iounmap(info->screen_base);
out_aper:
iounmap(par->cmap_adr);
par->cmap_adr = NULL;
framebuffer_release(info);
release_mem_region(res_start, res_size);
}
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;
int foreign_endian = 0;
#ifdef __BIG_ENDIAN
if (of_get_property(dp, "little-endian", NULL))
foreign_endian = FBINFO_FOREIGN_ENDIAN;
#else
if (of_get_property(dp, "big-endian", NULL))
foreign_endian = FBINFO_FOREIGN_ENDIAN;
#endif
pp = of_get_property(dp, "linux,bootx-depth", &len);
if (pp == NULL)
pp = of_get_property(dp, "depth", &len);
if (pp && len == sizeof(u32))
depth = *pp;
pp = of_get_property(dp, "linux,bootx-width", &len);
if (pp == NULL)
pp = of_get_property(dp, "width", &len);
if (pp && len == sizeof(u32))
width = *pp;
pp = of_get_property(dp, "linux,bootx-height", &len);
if (pp == NULL)
pp = of_get_property(dp, "height", &len);
if (pp && len == sizeof(u32))
height = *pp;
pp = of_get_property(dp, "linux,bootx-linebytes", &len);
if (pp == NULL)
pp = of_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 = of_get_property(dp, "linux,bootx-addr", &len);
if (up == NULL)
up = of_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,
foreign_endian, 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 (of_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 (of_get_property(dp, "linux,opened", NULL) &&
of_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 (of_get_property(dp, "linux,opened", NULL) &&
dp != boot_disp)
offb_init_nodriver(dp, 0);
}
return 0;
}
module_init(offb_init);
MODULE_LICENSE("GPL");