diff options
Diffstat (limited to 'drivers/video/offb.c')
| -rw-r--r-- | drivers/video/offb.c | 538 |
1 files changed, 538 insertions, 0 deletions
diff --git a/drivers/video/offb.c b/drivers/video/offb.c new file mode 100644 index 0000000..42a6591 --- /dev/null +++ b/drivers/video/offb.c @@ -0,0 +1,538 @@ +/* + * 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 += dp->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"); |
