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linux-zen-server/drivers/video/console/sticon.c

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/*
* linux/drivers/video/console/sticon.c - console driver using HP's STI firmware
*
* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
* Copyright (C) 2002-2020 Helge Deller <deller@gmx.de>
*
* Based on linux/drivers/video/vgacon.c and linux/drivers/video/fbcon.c,
* which were
*
* Created 28 Sep 1997 by Geert Uytterhoeven
* Rewritten by Martin Mares <mj@ucw.cz>, July 1998
* Copyright (C) 1991, 1992 Linus Torvalds
* 1995 Jay Estabrook
* Copyright (C) 1995 Geert Uytterhoeven
* Copyright (C) 1993 Bjoern Brauel
* Roman Hodek
* Copyright (C) 1993 Hamish Macdonald
* Greg Harp
* Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
*
* with work by William Rucklidge (wjr@cs.cornell.edu)
* Geert Uytterhoeven
* Jes Sorensen (jds@kom.auc.dk)
* Martin Apel
* with work by Guenther Kelleter
* Martin Schaller
* Andreas Schwab
* Emmanuel Marty (core@ggi-project.org)
* Jakub Jelinek (jj@ultra.linux.cz)
* Martin Mares <mj@ucw.cz>
*
* 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/init.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/errno.h>
#include <linux/vt_kern.h>
#include <linux/kd.h>
#include <linux/selection.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/font.h>
#include <linux/crc32.h>
#include <linux/fb.h>
#include <asm/io.h>
#include "../fbdev/sticore.h"
/* switching to graphics mode */
#define BLANK 0
static int vga_is_gfx;
#define STI_DEF_FONT sticon_sti->font
/* borrowed from fbcon.c */
#define FNTREFCOUNT(fd) (fd->refcount)
#define FNTCRC(fd) (fd->crc)
static struct sti_cooked_font *font_data[MAX_NR_CONSOLES];
/* this is the sti_struct used for this console */
static struct sti_struct *sticon_sti;
static const char *sticon_startup(void)
{
return "STI console";
}
static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos)
{
if (vga_is_gfx || console_blanked)
return;
if (conp->vc_mode != KD_TEXT)
return;
sti_putc(sticon_sti, c, ypos, xpos, font_data[conp->vc_num]);
}
static void sticon_putcs(struct vc_data *conp, const unsigned short *s,
int count, int ypos, int xpos)
{
if (vga_is_gfx || console_blanked)
return;
if (conp->vc_mode != KD_TEXT)
return;
while (count--) {
sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++,
font_data[conp->vc_num]);
}
}
static void sticon_cursor(struct vc_data *conp, int mode)
{
unsigned short car1;
/* no cursor update if screen is blanked */
if (vga_is_gfx || console_blanked)
return;
car1 = conp->vc_screenbuf[conp->state.x + conp->state.y * conp->vc_cols];
switch (mode) {
case CM_ERASE:
sti_putc(sticon_sti, car1, conp->state.y, conp->state.x,
font_data[conp->vc_num]);
break;
case CM_MOVE:
case CM_DRAW:
switch (CUR_SIZE(conp->vc_cursor_type)) {
case CUR_UNDERLINE:
case CUR_LOWER_THIRD:
case CUR_LOWER_HALF:
case CUR_TWO_THIRDS:
case CUR_BLOCK:
sti_putc(sticon_sti, (car1 & 255) + (0 << 8) + (7 << 11),
conp->state.y, conp->state.x, font_data[conp->vc_num]);
break;
}
break;
}
}
static bool sticon_scroll(struct vc_data *conp, unsigned int t,
unsigned int b, enum con_scroll dir, unsigned int count)
{
struct sti_struct *sti = sticon_sti;
if (vga_is_gfx)
return false;
sticon_cursor(conp, CM_ERASE);
switch (dir) {
case SM_UP:
sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols,
font_data[conp->vc_num]);
sti_clear(sti, b - count, 0, count, conp->vc_cols,
conp->vc_video_erase_char, font_data[conp->vc_num]);
break;
case SM_DOWN:
sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols,
font_data[conp->vc_num]);
sti_clear(sti, t, 0, count, conp->vc_cols,
conp->vc_video_erase_char, font_data[conp->vc_num]);
break;
}
return false;
}
static int sticon_set_def_font(int unit, struct console_font *op)
{
if (font_data[unit] != STI_DEF_FONT) {
if (--FNTREFCOUNT(font_data[unit]) == 0) {
kfree(font_data[unit]->raw_ptr);
kfree(font_data[unit]);
}
font_data[unit] = STI_DEF_FONT;
}
return 0;
}
static int sticon_set_font(struct vc_data *vc, struct console_font *op,
unsigned int vpitch)
{
struct sti_struct *sti = sticon_sti;
int vc_cols, vc_rows, vc_old_cols, vc_old_rows;
int unit = vc->vc_num;
int w = op->width;
int h = op->height;
int size, i, bpc, pitch;
struct sti_rom_font *new_font;
struct sti_cooked_font *cooked_font;
unsigned char *data = op->data, *p;
if ((w < 6) || (h < 6) || (w > 32) || (h > 32) || (vpitch != 32)
|| (op->charcount != 256 && op->charcount != 512))
return -EINVAL;
pitch = ALIGN(w, 8) / 8;
bpc = pitch * h;
size = bpc * op->charcount;
new_font = kmalloc(sizeof(*new_font) + size, STI_LOWMEM);
if (!new_font)
return -ENOMEM;
new_font->first_char = 0;
new_font->last_char = op->charcount - 1;
new_font->width = w;
new_font->height = h;
new_font->font_type = STI_FONT_HPROMAN8;
new_font->bytes_per_char = bpc;
new_font->underline_height = 0;
new_font->underline_pos = 0;
cooked_font = kzalloc(sizeof(*cooked_font), GFP_KERNEL);
if (!cooked_font) {
kfree(new_font);
return -ENOMEM;
}
cooked_font->raw = new_font;
cooked_font->raw_ptr = new_font;
cooked_font->width = w;
cooked_font->height = h;
FNTREFCOUNT(cooked_font) = 0; /* usage counter */
p = (unsigned char *) new_font;
p += sizeof(*new_font);
for (i = 0; i < op->charcount; i++) {
memcpy(p, data, bpc);
data += pitch*32;
p += bpc;
}
FNTCRC(cooked_font) = crc32(0, new_font, size + sizeof(*new_font));
sti_font_convert_bytemode(sti, cooked_font);
new_font = cooked_font->raw_ptr;
/* check if font is already used by other console */
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (font_data[i] != STI_DEF_FONT
&& (FNTCRC(font_data[i]) == FNTCRC(cooked_font))) {
kfree(new_font);
kfree(cooked_font);
/* current font is the same as the new one */
if (i == unit)
return 0;
cooked_font = font_data[i];
new_font = cooked_font->raw_ptr;
break;
}
}
/* clear screen with old font: we now may have less rows */
vc_old_rows = vc->vc_rows;
vc_old_cols = vc->vc_cols;
sti_clear(sticon_sti, 0, 0, vc_old_rows, vc_old_cols,
vc->vc_video_erase_char, font_data[vc->vc_num]);
/* delete old font in case it is a user font */
sticon_set_def_font(unit, NULL);
FNTREFCOUNT(cooked_font)++;
font_data[unit] = cooked_font;
vc_cols = sti_onscreen_x(sti) / cooked_font->width;
vc_rows = sti_onscreen_y(sti) / cooked_font->height;
vc_resize(vc, vc_cols, vc_rows);
/* need to repaint screen if cols & rows are same as old font */
if (vc_cols == vc_old_cols && vc_rows == vc_old_rows)
update_screen(vc);
return 0;
}
static int sticon_font_default(struct vc_data *vc, struct console_font *op, char *name)
{
return sticon_set_def_font(vc->vc_num, op);
}
static int sticon_font_set(struct vc_data *vc, struct console_font *font,
unsigned int vpitch, unsigned int flags)
{
return sticon_set_font(vc, font, vpitch);
}
static void sticon_init(struct vc_data *c, int init)
{
struct sti_struct *sti = sticon_sti;
int vc_cols, vc_rows;
sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0);
vc_cols = sti_onscreen_x(sti) / sti->font->width;
vc_rows = sti_onscreen_y(sti) / sti->font->height;
c->vc_can_do_color = 1;
if (init) {
c->vc_cols = vc_cols;
c->vc_rows = vc_rows;
} else {
vc_resize(c, vc_cols, vc_rows);
}
}
static void sticon_deinit(struct vc_data *c)
{
int i;
/* free memory used by user font */
for (i = 0; i < MAX_NR_CONSOLES; i++)
sticon_set_def_font(i, NULL);
}
static void sticon_clear(struct vc_data *conp, int sy, int sx, int height,
int width)
{
if (!height || !width)
return;
sti_clear(sticon_sti, sy, sx, height, width,
conp->vc_video_erase_char, font_data[conp->vc_num]);
}
static int sticon_switch(struct vc_data *conp)
{
return 1; /* needs refreshing */
}
static int sticon_blank(struct vc_data *c, int blank, int mode_switch)
{
if (blank == 0) {
if (mode_switch)
vga_is_gfx = 0;
return 1;
}
sti_clear(sticon_sti, 0, 0, c->vc_rows, c->vc_cols, BLANK,
font_data[c->vc_num]);
if (mode_switch)
vga_is_gfx = 1;
return 1;
}
static u8 sticon_build_attr(struct vc_data *conp, u8 color,
enum vc_intensity intens,
bool blink, bool underline, bool reverse,
bool italic)
{
u8 fg = color & 7;
u8 bg = (color & 0x70) >> 4;
if (reverse)
return (fg << 3) | bg;
else
return (bg << 3) | fg;
}
static void sticon_invert_region(struct vc_data *conp, u16 *p, int count)
{
int col = 1; /* vga_can_do_color; */
while (count--) {
u16 a = scr_readw(p);
if (col)
a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
else
a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700;
scr_writew(a, p++);
}
}
static const struct consw sti_con = {
.owner = THIS_MODULE,
.con_startup = sticon_startup,
.con_init = sticon_init,
.con_deinit = sticon_deinit,
.con_clear = sticon_clear,
.con_putc = sticon_putc,
.con_putcs = sticon_putcs,
.con_cursor = sticon_cursor,
.con_scroll = sticon_scroll,
.con_switch = sticon_switch,
.con_blank = sticon_blank,
.con_font_set = sticon_font_set,
.con_font_default = sticon_font_default,
.con_build_attr = sticon_build_attr,
.con_invert_region = sticon_invert_region,
};
static int __init sticonsole_init(void)
{
int err, i;
/* already initialized ? */
if (sticon_sti)
return 0;
sticon_sti = sti_get_rom(0);
if (!sticon_sti)
return -ENODEV;
for (i = 0; i < MAX_NR_CONSOLES; i++)
font_data[i] = STI_DEF_FONT;
pr_info("sticon: Initializing STI text console on %s at [%s]\n",
sticon_sti->sti_data->inq_outptr.dev_name,
sticon_sti->pa_path);
console_lock();
err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1,
PAGE0->mem_cons.cl_class != CL_DUPLEX);
console_unlock();
return err;
}
module_init(sticonsole_init);
MODULE_LICENSE("GPL");
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