offb.c
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上传日期:2013-04-10
资源大小:33168k
文件大小:23k
- /*
- * 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/selection.h>
- #include <linux/init.h>
- #include <linux/ioport.h>
- #ifdef CONFIG_FB_COMPAT_XPMAC
- #include <asm/vc_ioctl.h>
- #endif
- #include <asm/io.h>
- #include <asm/prom.h>
- #ifdef CONFIG_BOOTX_TEXT
- #include <asm/bootx.h>
- #endif
- #include <video/fbcon.h>
- #include <video/fbcon-cfb8.h>
- #include <video/fbcon-cfb16.h>
- #include <video/fbcon-cfb32.h>
- #include <video/macmodes.h>
- static int currcon = 0;
- /* 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 fb_info_offb {
- struct fb_info info;
- struct fb_fix_screeninfo fix;
- struct fb_var_screeninfo var;
- struct display disp;
- struct { u_char red, green, blue, pad; } palette[256];
- volatile unsigned char *cmap_adr;
- volatile unsigned char *cmap_data;
- int cmap_type;
- int blanked;
- union {
- #ifdef FBCON_HAS_CFB16
- u16 cfb16[16];
- #endif
- #ifdef FBCON_HAS_CFB32
- u32 cfb32[16];
- #endif
- } fbcon_cmap;
- };
- #ifdef __powerpc__
- #define mach_eieio() eieio()
- #else
- #define mach_eieio() do {} while (0)
- #endif
- /*
- * Interface used by the world
- */
- int offb_init(void);
- static int offb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info);
- static int offb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info);
- static int offb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info);
- static int offb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info);
- static int offb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info);
- #ifdef CONFIG_BOOTX_TEXT
- 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);
- /*
- * Interface to the low level console driver
- */
- static int offbcon_switch(int con, struct fb_info *info);
- static int offbcon_updatevar(int con, struct fb_info *info);
- static void offbcon_blank(int blank, struct fb_info *info);
- /*
- * Internal routines
- */
- static int offb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
- u_int *transp, struct fb_info *info);
- static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
- u_int transp, struct fb_info *info);
- static void do_install_cmap(int con, struct fb_info *info);
- static struct fb_ops offb_ops = {
- owner: THIS_MODULE,
- fb_get_fix: offb_get_fix,
- fb_get_var: offb_get_var,
- fb_set_var: offb_set_var,
- fb_get_cmap: offb_get_cmap,
- fb_set_cmap: offb_set_cmap,
- };
- /*
- * Get the Fixed Part of the Display
- */
- static int offb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info)
- {
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- memcpy(fix, &info2->fix, sizeof(struct fb_fix_screeninfo));
- return 0;
- }
- /*
- * Get the User Defined Part of the Display
- */
- static int offb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- memcpy(var, &info2->var, sizeof(struct fb_var_screeninfo));
- return 0;
- }
- /*
- * Set the User Defined Part of the Display
- */
- static int offb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- struct display *display;
- unsigned int oldbpp = 0;
- int err;
- int activate = var->activate;
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- if (con >= 0)
- display = &fb_display[con];
- else
- display = &info2->disp; /* used during initialization */
- if (var->xres > info2->var.xres || var->yres > info2->var.yres ||
- var->xres_virtual > info2->var.xres_virtual ||
- var->yres_virtual > info2->var.yres_virtual ||
- var->bits_per_pixel > info2->var.bits_per_pixel ||
- var->nonstd ||
- (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
- return -EINVAL;
- memcpy(var, &info2->var, sizeof(struct fb_var_screeninfo));
- if ((activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
- oldbpp = display->var.bits_per_pixel;
- display->var = *var;
- }
- if ((oldbpp != var->bits_per_pixel) || (display->cmap.len == 0)) {
- if ((err = fb_alloc_cmap(&display->cmap, 0, 0)))
- return err;
- do_install_cmap(con, info);
- }
- return 0;
- }
- /*
- * Get the Colormap
- */
- static int offb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- if (con == currcon && !info2->blanked) /* current console? */
- return fb_get_cmap(cmap, kspc, offb_getcolreg, info);
- if (fb_display[con].cmap.len) /* non default colormap? */
- fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
- else
- {
- int size = fb_display[con].var.bits_per_pixel == 16 ? 32 : 256;
- fb_copy_cmap(fb_default_cmap(size), cmap, kspc ? 0 : 2);
- }
- return 0;
- }
- /*
- * Set the Colormap
- */
- static int offb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- int err;
- if (!info2->cmap_adr)
- return -ENOSYS;
- if (!fb_display[con].cmap.len) { /* no colormap allocated? */
- int size = fb_display[con].var.bits_per_pixel == 16 ? 32 : 256;
- if ((err = fb_alloc_cmap(&fb_display[con].cmap, size, 0)))
- return err;
- }
- if (con == currcon && !info2->blanked) /* current console? */
- return fb_set_cmap(cmap, kspc, offb_setcolreg, info);
- else
- fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
- return 0;
- }
- /*
- * Initialisation
- */
- int __init offb_init(void)
- {
- struct device_node *dp;
- unsigned int dpy;
- #ifdef CONFIG_BOOTX_TEXT
- struct device_node *displays = find_type_devices("display");
- struct device_node *macos_display = NULL;
- /* If we're booted from BootX... */
- if (prom_num_displays == 0 && boot_infos != 0) {
- unsigned long addr = (unsigned long) boot_infos->dispDeviceBase;
- /* find the device node corresponding to the macos display */
- for (dp = displays; dp != NULL; dp = dp->next) {
- 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 %sn", 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
- for (dpy = 0; dpy < prom_num_displays; dpy++) {
- if ((dp = find_path_device(prom_display_paths[dpy])))
- 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, 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 %sn", dp->full_name);
- return;
- }
- address = (u_long)dp->addrs[i].address;
- /* 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)
- {
- int i;
- struct fb_fix_screeninfo *fix;
- struct fb_var_screeninfo *var;
- struct display *disp;
- struct fb_info_offb *info;
- unsigned long res_start = address;
- unsigned long res_size = pitch*height*depth/8;
- if (!request_mem_region(res_start, res_size, "offb"))
- return;
- printk(KERN_INFO "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%dn",
- width, height, name, address, depth, pitch);
- if (depth != 8 && depth != 16 && depth != 32) {
- printk(KERN_ERR "%s: can't use depth = %dn", full_name, depth);
- release_mem_region(res_start, res_size);
- return;
- }
- info = kmalloc(sizeof(struct fb_info_offb), GFP_ATOMIC);
- if (info == 0) {
- release_mem_region(res_start, res_size);
- return;
- }
- memset(info, 0, sizeof(*info));
- fix = &info->fix;
- var = &info->var;
- disp = &info->disp;
- strcpy(fix->id, "OFfb ");
- strncat(fix->id, name, sizeof(fix->id));
- fix->id[sizeof(fix->id)-1] = ' ';
- 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;
- info->cmap_type = cmap_unknown;
- if (depth == 8)
- {
- /* XXX kludge for ati's */
- if (dp && !strncmp(name, "ATY,Rage128", 11)) {
- unsigned long regbase = dp->addrs[2].address;
- info->cmap_adr = ioremap(regbase, 0x1FFF);
- info->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;
- info->cmap_adr = ioremap(regbase, 0x1FFF);
- info->cmap_type = cmap_M3A;
- } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
- unsigned long regbase = dp->parent->addrs[2].address;
- info->cmap_adr = ioremap(regbase, 0x1FFF);
- info->cmap_type = cmap_M3B;
- } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
- unsigned long regbase = dp->addrs[1].address;
- info->cmap_adr = ioremap(regbase, 0x1FFF);
- info->cmap_type = cmap_radeon;
- } else if (!strncmp(name, "ATY,", 4)) {
- /* Hrm... this is bad... any recent ATI not covered
- * by the previous cases will get there, while this
- * cose is only good for mach64's. Gotta figure out
- * a proper fix... --BenH.
- */
- unsigned long base = address & 0xff000000UL;
- info->cmap_adr = ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
- info->cmap_data = info->cmap_adr + 1;
- info->cmap_type = cmap_m64;
- } else if (dp && device_is_compatible(dp, "pci1014,b7")) {
- unsigned long regbase = dp->addrs[0].address;
- info->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
- info->cmap_type = cmap_gxt2000;
- }
- fix->visual = info->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
- : FB_VISUAL_STATIC_PSEUDOCOLOR;
- }
- else
- fix->visual = /*info->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;
- disp->var = *var;
- disp->cmap.start = 0;
- disp->cmap.len = 0;
- disp->cmap.red = NULL;
- disp->cmap.green = NULL;
- disp->cmap.blue = NULL;
- disp->cmap.transp = NULL;
- disp->screen_base = ioremap(address, fix->smem_len);
- disp->visual = fix->visual;
- disp->type = fix->type;
- disp->type_aux = fix->type_aux;
- disp->ypanstep = 0;
- disp->ywrapstep = 0;
- disp->line_length = fix->line_length;
- disp->can_soft_blank = info->cmap_adr ? 1 : 0;
- disp->inverse = 0;
- switch (depth) {
- #ifdef FBCON_HAS_CFB8
- case 8:
- disp->dispsw = &fbcon_cfb8;
- break;
- #endif
- #ifdef FBCON_HAS_CFB16
- case 16:
- disp->dispsw = &fbcon_cfb16;
- disp->dispsw_data = info->fbcon_cmap.cfb16;
- for (i = 0; i < 16; i++)
- if (fix->visual == FB_VISUAL_TRUECOLOR)
- info->fbcon_cmap.cfb16[i] =
- (((default_blu[i] >> 3) & 0x1f) << 10) |
- (((default_grn[i] >> 3) & 0x1f) << 5) |
- ((default_red[i] >> 3) & 0x1f);
- else
- info->fbcon_cmap.cfb16[i] =
- (i << 10) | (i << 5) | i;
- break;
- #endif
- #ifdef FBCON_HAS_CFB32
- case 32:
- disp->dispsw = &fbcon_cfb32;
- disp->dispsw_data = info->fbcon_cmap.cfb32;
- for (i = 0; i < 16; i++)
- if (fix->visual == FB_VISUAL_TRUECOLOR)
- info->fbcon_cmap.cfb32[i] =
- (default_blu[i] << 16) |
- (default_grn[i] << 8) |
- default_red[i];
- else
- info->fbcon_cmap.cfb32[i] =
- (i << 16) | (i << 8) | i;
- break;
- #endif
- default:
- disp->dispsw = &fbcon_dummy;
- }
- disp->scrollmode = SCROLL_YREDRAW;
- strcpy(info->info.modename, "OFfb ");
- strncat(info->info.modename, full_name, sizeof(info->info.modename));
- info->info.node = -1;
- info->info.fbops = &offb_ops;
- info->info.disp = disp;
- info->info.fontname[0] = ' ';
- info->info.changevar = NULL;
- info->info.switch_con = &offbcon_switch;
- info->info.updatevar = &offbcon_updatevar;
- info->info.blank = &offbcon_blank;
- info->info.flags = FBINFO_FLAG_DEFAULT;
- for (i = 0; i < 16; i++) {
- int j = color_table[i];
- info->palette[i].red = default_red[j];
- info->palette[i].green = default_grn[j];
- info->palette[i].blue = default_blu[j];
- }
- offb_set_var(var, -1, &info->info);
- if (register_framebuffer(&info->info) < 0) {
- kfree(info);
- release_mem_region(res_start, res_size);
- return;
- }
- printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %sn",
- GET_FB_IDX(info->info.node), full_name);
- #ifdef CONFIG_FB_COMPAT_XPMAC
- if (!console_fb_info) {
- display_info.height = var->yres;
- display_info.width = var->xres;
- display_info.depth = depth;
- display_info.pitch = fix->line_length;
- display_info.mode = 0;
- strncpy(display_info.name, name, sizeof(display_info.name));
- display_info.fb_address = address;
- display_info.cmap_adr_address = 0;
- display_info.cmap_data_address = 0;
- display_info.disp_reg_address = 0;
- /* XXX kludge for ati */
- if (info->cmap_type == cmap_m64) {
- unsigned long base = address & 0xff000000UL;
- display_info.disp_reg_address = base + 0x7ffc00;
- display_info.cmap_adr_address = base + 0x7ffcc0;
- display_info.cmap_data_address = base + 0x7ffcc1;
- }
- console_fb_info = &info->info;
- }
- #endif /* CONFIG_FB_COMPAT_XPMAC) */
- }
- static int offbcon_switch(int con, struct fb_info *info)
- {
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- /* Do we have to save the colormap? */
- if (fb_display[currcon].cmap.len && !info2->blanked)
- fb_get_cmap(&fb_display[currcon].cmap, 1, offb_getcolreg, info);
- currcon = con;
- /* Install new colormap */
- do_install_cmap(con, info);
- return 0;
- }
- /*
- * Update the `var' structure (called by fbcon.c)
- */
- static int offbcon_updatevar(int con, struct fb_info *info)
- {
- /* Nothing */
- return 0;
- }
- /*
- * Blank the display.
- */
- static void offbcon_blank(int blank, struct fb_info *info)
- {
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- int i, j;
- if (!info2->cmap_adr)
- return;
- if (!info2->blanked) {
- if (!blank)
- return;
- if (fb_display[currcon].cmap.len)
- fb_get_cmap(&fb_display[currcon].cmap, 1, offb_getcolreg, info);
- }
- info2->blanked = blank;
- if (blank)
- for (i = 0; i < 256; i++) {
- switch(info2->cmap_type) {
- case cmap_m64:
- *info2->cmap_adr = i;
- mach_eieio();
- for (j = 0; j < 3; j++) {
- *info2->cmap_data = 0;
- mach_eieio();
- }
- break;
- case cmap_M3A:
- /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
- out_le32((unsigned *)(info2->cmap_adr + 0x58),
- in_le32((unsigned *)(info2->cmap_adr + 0x58)) & ~0x20);
- case cmap_r128:
- /* Set palette index & data */
- out_8(info2->cmap_adr + 0xb0, i);
- out_le32((unsigned *)(info2->cmap_adr + 0xb4), 0);
- break;
- case cmap_M3B:
- /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
- out_le32((unsigned *)(info2->cmap_adr + 0x58),
- in_le32((unsigned *)(info2->cmap_adr + 0x58)) | 0x20);
- /* Set palette index & data */
- out_8(info2->cmap_adr + 0xb0, i);
- out_le32((unsigned *)(info2->cmap_adr + 0xb4), 0);
- break;
- case cmap_radeon:
- out_8(info2->cmap_adr + 0xb0, i);
- out_le32((unsigned *)(info2->cmap_adr + 0xb4), 0);
- break;
- case cmap_gxt2000:
- out_le32((unsigned *)info2->cmap_adr + i, 0);
- break;
- }
- }
- else
- do_install_cmap(currcon, info);
- }
- /*
- * Read a single color register and split it into
- * colors/transparent. Return != 0 for invalid regno.
- */
- static int offb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
- u_int *transp, struct fb_info *info)
- {
- struct fb_info_offb *info2 = (struct fb_info_offb *)info;
- if (!info2->cmap_adr || regno > 255)
- return 1;
-
- *red = (info2->palette[regno].red<<8) | info2->palette[regno].red;
- *green = (info2->palette[regno].green<<8) | info2->palette[regno].green;
- *blue = (info2->palette[regno].blue<<8) | info2->palette[regno].blue;
- *transp = 0;
- return 0;
- }
- /*
- * 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 fb_info_offb *info2 = (struct fb_info_offb *)info;
-
- if (!info2->cmap_adr || regno > 255)
- return 1;
- red >>= 8;
- green >>= 8;
- blue >>= 8;
- info2->palette[regno].red = red;
- info2->palette[regno].green = green;
- info2->palette[regno].blue = blue;
- switch(info2->cmap_type) {
- case cmap_m64:
- *info2->cmap_adr = regno;
- mach_eieio();
- *info2->cmap_data = red;
- mach_eieio();
- *info2->cmap_data = green;
- mach_eieio();
- *info2->cmap_data = blue;
- mach_eieio();
- break;
- case cmap_M3A:
- /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
- out_le32((unsigned *)(info2->cmap_adr + 0x58),
- in_le32((unsigned *)(info2->cmap_adr + 0x58)) & ~0x20);
- case cmap_r128:
- /* Set palette index & data */
- out_8(info2->cmap_adr + 0xb0, regno);
- out_le32((unsigned *)(info2->cmap_adr + 0xb4),
- (red << 16 | green << 8 | blue));
- break;
- case cmap_M3B:
- /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
- out_le32((unsigned *)(info2->cmap_adr + 0x58),
- in_le32((unsigned *)(info2->cmap_adr + 0x58)) | 0x20);
- /* Set palette index & data */
- out_8(info2->cmap_adr + 0xb0, regno);
- out_le32((unsigned *)(info2->cmap_adr + 0xb4),
- (red << 16 | green << 8 | blue));
- break;
- case cmap_radeon:
- /* Set palette index & data (could be smarter) */
- out_8(info2->cmap_adr + 0xb0, regno);
- out_le32((unsigned *)(info2->cmap_adr + 0xb4),
- (red << 16 | green << 8 | blue));
- break;
- case cmap_gxt2000:
- out_le32((unsigned *)info2->cmap_adr + regno,
- (red << 16 | green << 8 | blue));
- break;
- }
- if (regno < 16)
- switch (info2->var.bits_per_pixel) {
- #ifdef FBCON_HAS_CFB16
- case 16:
- info2->fbcon_cmap.cfb16[regno] = (regno << 10) | (regno << 5) | regno;
- break;
- #endif
- #ifdef FBCON_HAS_CFB32
- case 32:
- {
- int i = (regno << 8) | regno;
- info2->fbcon_cmap.cfb32[regno] = (i << 16) | i;
- break;
- }
- #endif
- }
- return 0;
- }
- static void do_install_cmap(int con, struct fb_info *info)
- {
- if (con != currcon)
- return;
- if (fb_display[con].cmap.len)
- fb_set_cmap(&fb_display[con].cmap, 1, offb_setcolreg, info);
- else
- {
- int size = fb_display[con].var.bits_per_pixel == 16 ? 32 : 256;
- fb_set_cmap(fb_default_cmap(size), 1, offb_setcolreg, info);
- }
- }
- MODULE_LICENSE("GPL");