/* * linux/drivers/video/pmagb-b-fb.c * * PMAGB-B TurboChannel framebuffer card support ... derived from: * "HP300 Topcat framebuffer support (derived from macfb of all things) * Phil Blundell 1998", the original code can be * found in the file hpfb.c in the same directory. * * DECstation related code Copyright (C) 1999, 2000, 2001 by * Michael Engel , * Karsten Merker and * Harald Koerfgen. * 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. * */ /* * We currently only support the PMAGB-B in high resolution mode * as I know of no way to detect low resolution mode set via jumper. * KM, 2001/01/07 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pmagb-b-fb.h" #include #include #include #include #include #define arraysize(x) (sizeof(x)/sizeof(*(x))) struct pmagb_b_ramdac_regs { unsigned char addr_low; unsigned char pad0[3]; unsigned char addr_hi; unsigned char pad1[3]; unsigned char data; unsigned char pad2[3]; unsigned char cmap; }; struct pmagb_b_my_fb_info { struct fb_info info; struct pmagb_b_ramdac_regs *bt459_regs; unsigned long pmagbb_fb_start; unsigned long pmagbb_fb_size; unsigned long pmagbb_fb_line_length; }; static struct display disp; /* * Max 3 TURBOchannel slots -> max 3 PMAGB-B :) */ static struct pmagb_b_my_fb_info pmagbb_fb_info[3]; static struct fb_var_screeninfo pmagbbfb_defined = { 0, 0, 0, 0, /* W,H, W, H (virtual) load xres,xres_virtual */ 0, 0, /* virtual -> visible no offset */ 0, /* depth -> load bits_per_pixel */ 0, /* greyscale ? */ {0, 0, 0}, /* R */ {0, 0, 0}, /* G */ {0, 0, 0}, /* B */ {0, 0, 0}, /* transparency */ 0, /* standard pixel format */ FB_ACTIVATE_NOW, 274, 195, /* 14" monitor */ FB_ACCEL_NONE, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0, /* No sync info */ FB_VMODE_NONINTERLACED, {0, 0, 0, 0, 0, 0} }; struct pmagbbfb_par { }; static int currcon = 0; struct pmagbbfb_par current_par; static void pmagbbfb_encode_var(struct fb_var_screeninfo *var, struct pmagbbfb_par *par) { int i = 0; var->xres = 1280; var->yres = 1024; var->xres_virtual = 1280; var->yres_virtual = 1024; var->xoffset = 0; var->yoffset = 0; var->bits_per_pixel = 8; var->grayscale = 0; var->transp.offset = 0; var->transp.length = 0; var->transp.msb_right = 0; var->nonstd = 0; var->activate = 1; var->height = -1; var->width = -1; var->vmode = FB_VMODE_NONINTERLACED; var->pixclock = 0; var->sync = 0; var->left_margin = 0; var->right_margin = 0; var->upper_margin = 0; var->lower_margin = 0; var->hsync_len = 0; var->vsync_len = 0; for (i = 0; i < arraysize(var->reserved); i++) var->reserved[i] = 0; } static void pmagbbfb_get_par(struct pmagbbfb_par *par) { *par = current_par; } static int pmagbb_fb_update_var(int con, struct fb_info *info) { return 0; } static int pmagbb_do_fb_set_var(struct fb_var_screeninfo *var, int isactive) { struct pmagbbfb_par par; pmagbbfb_get_par(&par); pmagbbfb_encode_var(var, &par); return 0; } /* * Turn hardware cursor off */ void pmagbbfb_erase_cursor(struct pmagb_b_my_fb_info *info) { info->bt459_regs->addr_low = 0; info->bt459_regs->addr_hi = 3; info->bt459_regs->data = 0; } /* * Write to a Bt459 color map register */ void pmagb_b_bt459_write_colormap(struct pmagb_b_my_fb_info *info, int reg, __u8 red, __u8 green, __u8 blue) { info->bt459_regs->addr_low = (__u8) reg; info->bt459_regs->addr_hi = 0; info->bt459_regs->cmap = red; info->bt459_regs->cmap = green; info->bt459_regs->cmap = blue; } /* * Get the palette */ static int pmagbbfb_get_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info) { unsigned int i; unsigned int length; if (((cmap->start) + (cmap->len)) >= 256) { length = 256 - (cmap->start); } else { length = cmap->len; } for (i = 0; i < length; i++) { /* * TODO */ } return 0; } /* * Set the palette. */ static int pmagbbfb_set_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info) { unsigned int i; __u8 cmap_red, cmap_green, cmap_blue; unsigned int length; if (((cmap->start) + (cmap->len)) >= 256) length = 256 - (cmap->start); else length = cmap->len; for (i = 0; i < length; i++) { cmap_red = ((cmap->red[i]) >> 8); /* The cmap fields are 16 bits */ cmap_green = ((cmap->green[i]) >> 8); /* wide, but the harware colormap */ cmap_blue = ((cmap->blue[i]) >> 8); /* registers are only 8 bits wide */ pmagb_b_bt459_write_colormap((struct pmagb_b_my_fb_info *) info, cmap->start + i, cmap_red, cmap_green, cmap_blue); } return 0; } static int pmagbbfb_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info) { struct pmagbbfb_par par; if (con == -1) { pmagbbfb_get_par(&par); pmagbbfb_encode_var(var, &par); } else *var = fb_display[con].var; return 0; } static int pmagbbfb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info) { int err; if ((err = pmagbb_do_fb_set_var(var, 1))) return err; return 0; } static void pmagbbfb_encode_fix(struct fb_fix_screeninfo *fix, struct pmagbbfb_par *par, struct pmagb_b_my_fb_info *info) { memset(fix, 0, sizeof(struct fb_fix_screeninfo)); strcpy(fix->id, "PMAGB-BA"); fix->smem_start = info->pmagbb_fb_start; fix->smem_len = info->pmagbb_fb_size; fix->type = FB_TYPE_PACKED_PIXELS; fix->visual = FB_VISUAL_PSEUDOCOLOR; fix->xpanstep = 0; fix->ypanstep = 0; fix->ywrapstep = 0; fix->line_length = info->pmagbb_fb_line_length; } static int pmagbbfb_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info) { struct pmagbbfb_par par; pmagbbfb_get_par(&par); pmagbbfb_encode_fix(fix, &par, (struct pmagb_b_my_fb_info *) info); return 0; } static int pmagbbfb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg, int con, struct fb_info *info) { return -EINVAL; } static int pmagbbfb_switch(int con, struct fb_info *info) { pmagbb_do_fb_set_var(&fb_display[con].var, 1); currcon = con; return 0; } /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */ static void pmagbbfb_blank(int blank, struct fb_info *info) { /* Not supported */ } static int pmagbbfb_open(struct fb_info *info, int user) { /* * Nothing, only a usage count for the moment */ MOD_INC_USE_COUNT; return (0); } static void pmagbbfb_set_disp(int con, struct pmagb_b_my_fb_info *info) { struct fb_fix_screeninfo fix; struct display *display; if (con >= 0) display = &fb_display[con]; else display = &disp; /* used during initialization */ pmagbbfb_get_fix(&fix, con, (struct fb_info *) info); display->screen_base = (char *) fix.smem_start; display->visual = fix.visual; display->type = fix.type; display->type_aux = fix.type_aux; display->ypanstep = fix.ypanstep; display->ywrapstep = fix.ywrapstep; display->line_length = fix.line_length; display->next_line = fix.line_length; display->can_soft_blank = 0; display->inverse = 0; display->dispsw = &fbcon_cfb8; } static int pmagbbfb_release(struct fb_info *info, int user) { MOD_DEC_USE_COUNT; return (0); } static struct fb_ops pmagbbfb_ops = { owner:THIS_MODULE, fb_open:pmagbbfb_open, fb_release:pmagbbfb_release, fb_get_fix:pmagbbfb_get_fix, fb_get_var:pmagbbfb_get_var, fb_set_var:pmagbbfb_set_var, fb_get_cmap:pmagbbfb_get_cmap, fb_set_cmap:pmagbbfb_set_cmap, fb_ioctl:pmagbbfb_ioctl, fb_mmap:0, fb_rasterimg:0 }; int __init pmagbbfb_init_one(int slot) { unsigned long base_addr = get_tc_base_addr(slot); struct pmagb_b_my_fb_info *ip = (struct pmagb_b_my_fb_info *) &pmagbb_fb_info[slot]; printk("PMAGB-BA framebuffer in slot %d\n", slot); /* * Framebuffer display memory base address and friends */ ip->bt459_regs = (struct pmagb_b_ramdac_regs *) (base_addr + PMAGB_B_BT459_OFFSET); ip->pmagbb_fb_start = base_addr + PMAGB_B_ONBOARD_FBMEM_OFFSET; ip->pmagbb_fb_size = 1280 * 1024; ip->pmagbb_fb_line_length = 1280; /* * Configure the Bt459 RAM DAC */ pmagbbfb_erase_cursor(ip); /* * Fill in the available video resolution */ pmagbbfb_defined.xres = 1280; pmagbbfb_defined.yres = 1024; pmagbbfb_defined.xres_virtual = 1280; pmagbbfb_defined.yres_virtual = 1024; pmagbbfb_defined.bits_per_pixel = 8; /* * Let there be consoles.. */ strcpy(ip->info.modename, "PMAGB-BA"); ip->info.changevar = NULL; ip->info.node = -1; ip->info.fbops = &pmagbbfb_ops; ip->info.disp = &disp; ip->info.switch_con = &pmagbbfb_switch; ip->info.updatevar = &pmagbb_fb_update_var; ip->info.blank = &pmagbbfb_blank; ip->info.flags = FBINFO_FLAG_DEFAULT; pmagbb_do_fb_set_var(&pmagbbfb_defined, 1); pmagbbfb_get_var(&disp.var, -1, (struct fb_info *) ip); pmagbbfb_set_disp(-1, ip); if (register_framebuffer((struct fb_info *) ip) < 0) return 1; return 0; } /* * Initialise the framebuffer */ int __init pmagbbfb_init(void) { int sid; int found = 0; if (TURBOCHANNEL) { while ((sid = search_tc_card("PMAGB-BA")) >= 0) { found = 1; claim_tc_card(sid); pmagbbfb_init_one(sid); } return found ? 0 : -ENODEV; } else { return -ENODEV; } } int __init pmagbbfb_setup(char *options) { return 0; } MODULE_LICENSE("GPL");
