/*
* 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/tty.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 inode *inode, struct file *file, u32 cmd,
unsigned long arg, int con, struct fb_info *info)
{
/* 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 = 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
