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