| /* |
| * 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) { |
| iounmap(par->cmap_adr); |
| par->cmap_adr = NULL; |
| iounmap(info->screen_base); |
| 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 = 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, |
| 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"); |