/* * linux/drivers/video/pmag-aa-fb.c * Copyright 2002 Karsten Merker <merker@debian.org> * * PMAG-AA TurboChannel framebuffer card support ... derived from * pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by * Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org> * and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from * "HP300 Topcat framebuffer support (derived from macfb of all things) * Phil Blundell <philb@gnu.org> 1998" * * 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. * * 2002-09-28 Karsten Merker <merker@linuxtag.org> * Version 0.01: First try to get a PMAG-AA running. * * 2003-02-24 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> * Version 0.02: Major code cleanup. * * 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> * Hardware cursor support. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/fb.h> #include <linux/console.h> #include <asm/bootinfo.h> #include <asm/dec/machtype.h> #include <asm/dec/tc.h> #include <video/fbcon.h> #include <video/fbcon-cfb8.h> #include "bt455.h" #include "bt431.h" /* Version information */ #define DRIVER_VERSION "0.02" #define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>" #define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver" /* Prototypes */ static int aafb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info); /* * Bt455 RAM DAC register base offset (rel. to TC slot base address). */ #define PMAG_AA_BT455_OFFSET 0x100000 /* * Bt431 cursor generator offset (rel. to TC slot base address). */ #define PMAG_AA_BT431_OFFSET 0x180000 /* * Begin of PMAG-AA framebuffer memory relative to TC slot address, * resolution is 1280x1024x1 (8 bits deep, but only LSB is used). */ #define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000 struct aafb_cursor { struct timer_list timer; int enable; int on; int vbl_cnt; int blink_rate; u16 x, y, width, height; }; #define CURSOR_TIMER_FREQ (HZ / 50) #define CURSOR_BLINK_RATE (20) #define CURSOR_DRAW_DELAY (2) struct aafb_info { struct fb_info info; struct display disp; struct aafb_cursor cursor; struct bt455_regs *bt455; struct bt431_regs *bt431; unsigned long fb_start; unsigned long fb_size; unsigned long fb_line_length; }; /* * Max 3 TURBOchannel slots -> max 3 PMAG-AA. */ static struct aafb_info my_fb_info[3]; static struct aafb_par { } current_par; static int currcon = -1; static void aafb_set_cursor(struct aafb_info *info, int on) { struct aafb_cursor *c = &info->cursor; if (on) { bt431_position_cursor(info->bt431, c->x, c->y); bt431_enable_cursor(info->bt431); } else bt431_erase_cursor(info->bt431); } static void aafbcon_cursor(struct display *disp, int mode, int x, int y) { struct aafb_info *info = (struct aafb_info *)disp->fb_info; struct aafb_cursor *c = &info->cursor; x *= fontwidth(disp); y *= fontheight(disp); if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable) return; c->enable = 0; if (c->on) aafb_set_cursor(info, 0); c->x = x - disp->var.xoffset; c->y = y - disp->var.yoffset; switch (mode) { case CM_ERASE: c->on = 0; break; case CM_DRAW: case CM_MOVE: if (c->on) aafb_set_cursor(info, c->on); else c->vbl_cnt = CURSOR_DRAW_DELAY; c->enable = 1; break; } } static int aafbcon_set_font(struct display *disp, int width, int height) { struct aafb_info *info = (struct aafb_info *)disp->fb_info; struct aafb_cursor *c = &info->cursor; u8 fgc = ~attr_bgcol_ec(disp, disp->conp); if (width > 64 || height > 64 || width < 0 || height < 0) return -EINVAL; c->height = height; c->width = width; bt431_set_font(info->bt431, fgc, width, height); return 1; } static void aafb_cursor_timer_handler(unsigned long data) { struct aafb_info *info = (struct aafb_info *)data; struct aafb_cursor *c = &info->cursor; if (!c->enable) goto out; if (c->vbl_cnt && --c->vbl_cnt == 0) { c->on ^= 1; aafb_set_cursor(info, c->on); c->vbl_cnt = c->blink_rate; } out: c->timer.expires = jiffies + CURSOR_TIMER_FREQ; add_timer(&c->timer); } static void __init aafb_cursor_init(struct aafb_info *info) { struct aafb_cursor *c = &info->cursor; c->enable = 1; c->on = 1; c->x = c->y = 0; c->width = c->height = 0; c->vbl_cnt = CURSOR_DRAW_DELAY; c->blink_rate = CURSOR_BLINK_RATE; init_timer(&c->timer); c->timer.data = (unsigned long)info; c->timer.function = aafb_cursor_timer_handler; mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ); } static void __exit aafb_cursor_exit(struct aafb_info *info) { struct aafb_cursor *c = &info->cursor; del_timer_sync(&c->timer); } static struct display_switch aafb_switch8 = { .setup = fbcon_cfb8_setup, .bmove = fbcon_cfb8_bmove, .clear = fbcon_cfb8_clear, .putc = fbcon_cfb8_putc, .putcs = fbcon_cfb8_putcs, .revc = fbcon_cfb8_revc, .cursor = aafbcon_cursor, .set_font = aafbcon_set_font, .clear_margins = fbcon_cfb8_clear_margins, .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16) }; static void aafb_get_par(struct aafb_par *par) { *par = current_par; } static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info) { struct aafb_info *ip = (struct aafb_info *)info; memset(fix, 0, sizeof(struct fb_fix_screeninfo)); strcpy(fix->id, "PMAG-AA"); fix->smem_start = ip->fb_start; fix->smem_len = ip->fb_size; fix->type = FB_TYPE_PACKED_PIXELS; fix->ypanstep = 1; fix->ywrapstep = 1; fix->visual = FB_VISUAL_MONO10; fix->line_length = 1280; fix->accel = FB_ACCEL_NONE; return 0; } static void aafb_set_disp(struct display *disp, int con, struct aafb_info *info) { struct fb_fix_screeninfo fix; disp->fb_info = &info->info; aafb_set_var(&disp->var, con, &info->info); if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor) disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE); disp->dispsw = &aafb_switch8; disp->dispsw_data = 0; aafb_get_fix(&fix, con, &info->info); disp->screen_base = (u8 *) fix.smem_start; disp->visual = fix.visual; disp->type = fix.type; disp->type_aux = fix.type_aux; disp->ypanstep = fix.ypanstep; disp->ywrapstep = fix.ywrapstep; disp->line_length = fix.line_length; disp->next_line = 2048; disp->can_soft_blank = 1; disp->inverse = 0; disp->scrollmode = SCROLL_YREDRAW; aafbcon_set_font(disp, fontwidth(disp), fontheight(disp)); } static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info) { static u16 color[2] = {0x0000, 0x000f}; static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL}; fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2); return 0; } static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info) { u16 color[2] = {0x0000, 0x000f}; if (cmap->start == 0 && cmap->len == 2 && memcmp(cmap->red, color, sizeof(color)) == 0 && memcmp(cmap->green, color, sizeof(color)) == 0 && memcmp(cmap->blue, color, sizeof(color)) == 0 && cmap->transp == NULL) return 0; else return -EINVAL; } static int aafb_ioctl(struct fb_info *info, u32 cmd, unsigned long arg) { /* TODO: Not yet implemented */ return -ENOIOCTLCMD; } static int aafb_switch(int con, struct fb_info *info) { struct aafb_info *ip = (struct aafb_info *)info; struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon); struct display *new = (con < 0) ? &ip->disp : (fb_display + con); if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor) old->conp->vc_sw->con_cursor(old->conp, CM_ERASE); /* Set the current console. */ currcon = con; aafb_set_disp(new, con, ip); return 0; } static void aafb_encode_var(struct fb_var_screeninfo *var, struct aafb_par *par) { var->xres = 1280; var->yres = 1024; var->xres_virtual = 2048; var->yres_virtual = 1024; var->xoffset = 0; var->yoffset = 0; var->bits_per_pixel = 8; var->grayscale = 1; var->red.offset = 0; var->red.length = 0; var->red.msb_right = 0; var->green.offset = 0; var->green.length = 1; var->green.msb_right = 0; var->blue.offset = 0; var->blue.length = 0; var->blue.msb_right = 0; var->transp.offset = 0; var->transp.length = 0; var->transp.msb_right = 0; var->nonstd = 0; var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW; var->accel_flags = 0; var->sync = FB_SYNC_ON_GREEN; var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED; } static int aafb_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info) { if (con < 0) { struct aafb_par par; memset(var, 0, sizeof(struct fb_var_screeninfo)); aafb_get_par(&par); aafb_encode_var(var, &par); } else *var = info->var; return 0; } static int aafb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info) { struct aafb_par par; aafb_get_par(&par); aafb_encode_var(var, &par); info->var = *var; return 0; } static int aafb_update_var(int con, struct fb_info *info) { struct aafb_info *ip = (struct aafb_info *)info; struct display *disp = (con < 0) ? &ip->disp : (fb_display + con); if (con == currcon) aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y); return 0; } /* 0 unblanks, any other blanks. */ static void aafb_blank(int blank, struct fb_info *info) { struct aafb_info *ip = (struct aafb_info *)info; u8 val = blank ? 0x00 : 0x0f; bt455_write_cmap_entry(ip->bt455, 1, val, val, val); aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y); } static struct fb_ops aafb_ops = { .owner = THIS_MODULE, .fb_get_fix = aafb_get_fix, .fb_get_var = aafb_get_var, .fb_set_var = aafb_set_var, .fb_get_cmap = aafb_get_cmap, .fb_set_cmap = aafb_set_cmap, .fb_ioctl = aafb_ioctl }; static int __init init_one(int slot) { unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot)); struct aafb_info *ip = &my_fb_info[slot]; memset(ip, 0, sizeof(struct aafb_info)); /* * Framebuffer display memory base address and friends. */ ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET); ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET); ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET; ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length seems to be physical */ ip->fb_line_length = 2048; /* * Let there be consoles.. */ strcpy(ip->info.modename, "PMAG-AA"); ip->info.node = -1; ip->info.flags = FBINFO_FLAG_DEFAULT; ip->info.fbops = &aafb_ops; ip->info.disp = &ip->disp; ip->info.changevar = NULL; ip->info.switch_con = &aafb_switch; ip->info.updatevar = &aafb_update_var; ip->info.blank = &aafb_blank; aafb_set_disp(&ip->disp, currcon, ip); /* * Configure the RAM DACs. */ bt455_erase_cursor(ip->bt455); /* Init colormap. */ bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00); bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f); /* Init hardware cursor. */ bt431_init_cursor(ip->bt431); aafb_cursor_init(ip); /* Clear the screen. */ memset ((void *)ip->fb_start, 0, ip->fb_size); if (register_framebuffer(&ip->info) < 0) return -EINVAL; printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n", GET_FB_IDX(ip->info.node), ip->info.modename, slot); return 0; } static int __exit exit_one(int slot) { struct aafb_info *ip = &my_fb_info[slot]; if (unregister_framebuffer(&ip->info) < 0) return -EINVAL; return 0; } /* * Initialise the framebuffer. */ int __init pmagaafb_init(void) { int sid; int found = 0; while ((sid = search_tc_card("PMAG-AA")) >= 0) { found = 1; claim_tc_card(sid); init_one(sid); } return found ? 0 : -ENXIO; } static void __exit pmagaafb_exit(void) { int sid; while ((sid = search_tc_card("PMAG-AA")) >= 0) { exit_one(sid); release_tc_card(sid); } } MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESCRIPTION); MODULE_LICENSE("GPL"); #ifdef MODULE module_init(pmagaafb_init); module_exit(pmagaafb_exit); #endif