[15/99] sparc: Kill PROM console driver.

[Greg KH <gregkh@suse.de>]

[-- Attachment #1: sparc-kill-prom-console-driver.patch --]
[-- Type: text/plain, Size: 17291 bytes --]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: David S. Miller <davem@davemloft.net>

[ Upstream commit 09d3f3f0e02c8a900d076c302c5c02227f33572d ]

Many years ago when this driver was written, it had a use, but these
days it's nothing but trouble and distributions should not enable it
in any situation.

Pretty much every console device a sparc machine could see has a
bonafide real driver, making the PROM console hack unnecessary.

If any new device shows up, we should write a driver instead of
depending upon this crutch to save us.  We've been able to take care
of this even when no chip documentation exists (sunxvr500, sunxvr2500)
so there are no excuses.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 Documentation/dontdiff           |    1 
 arch/sparc/kernel/setup_32.c     |    2 
 arch/sparc/kernel/setup_64.c     |    2 
 drivers/char/vt.c                |    3 
 drivers/video/console/.gitignore |    2 
 drivers/video/console/Kconfig    |    9 
 drivers/video/console/Makefile   |   12 
 drivers/video/console/prom.uni   |   11 
 drivers/video/console/promcon.c  |  598 ---------------------------------------
 scripts/Makefile                 |    1 
 10 files changed, 1 insertion(+), 640 deletions(-)

--- a/arch/sparc/kernel/setup_32.c
+++ b/arch/sparc/kernel/setup_32.c
@@ -263,8 +263,6 @@ void __init setup_arch(char **cmdline_p)
 
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
-#elif defined(CONFIG_PROM_CONSOLE)
-	conswitchp = &prom_con;
 #endif
 	boot_flags_init(*cmdline_p);
 
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -295,8 +295,6 @@ void __init setup_arch(char **cmdline_p)
 
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
-#elif defined(CONFIG_PROM_CONSOLE)
-	conswitchp = &prom_con;
 #endif
 
 	idprom_init();
--- a/Documentation/dontdiff
+++ b/Documentation/dontdiff
@@ -152,7 +152,6 @@ piggy.gz
 piggyback
 pnmtologo
 ppc_defs.h*
-promcon_tbl.c
 pss_boot.h
 qconf
 raid6altivec*.c
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -2948,9 +2948,6 @@ int __init vty_init(const struct file_op
 		panic("Couldn't register console driver\n");
 	kbd_init();
 	console_map_init();
-#ifdef CONFIG_PROM_CONSOLE
-	prom_con_init();
-#endif
 #ifdef CONFIG_MDA_CONSOLE
 	mda_console_init();
 #endif
--- a/drivers/video/console/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-# conmakehash generated file
-promcon_tbl.c
--- a/drivers/video/console/Kconfig
+++ b/drivers/video/console/Kconfig
@@ -67,16 +67,9 @@ config SGI_NEWPORT_CONSOLE
 
 #  bool 'IODC console' CONFIG_IODC_CONSOLE
 
-config PROM_CONSOLE
-	bool "PROM console"
-	depends on SPARC
-	help
-	  Say Y to build a console driver for Sun machines that uses the
-	  terminal emulation built into their console PROMS.
-
 config DUMMY_CONSOLE
 	bool
-	depends on PROM_CONSOLE!=y || VGA_CONSOLE!=y || SGI_NEWPORT_CONSOLE!=y 
+	depends on VGA_CONSOLE!=y || SGI_NEWPORT_CONSOLE!=y
 	default y
 
 config DUMMY_CONSOLE_COLUMNS
--- a/drivers/video/console/Makefile
+++ b/drivers/video/console/Makefile
@@ -22,7 +22,6 @@ font-objs += $(font-objs-y)
 
 obj-$(CONFIG_DUMMY_CONSOLE)       += dummycon.o
 obj-$(CONFIG_SGI_NEWPORT_CONSOLE) += newport_con.o font.o
-obj-$(CONFIG_PROM_CONSOLE)        += promcon.o promcon_tbl.o
 obj-$(CONFIG_STI_CONSOLE)         += sticon.o sticore.o font.o
 obj-$(CONFIG_VGA_CONSOLE)         += vgacon.o
 obj-$(CONFIG_MDA_CONSOLE)         += mdacon.o
@@ -40,14 +39,3 @@ obj-$(CONFIG_FB_STI)              += sti
 ifeq ($(CONFIG_USB_SISUSBVGA_CON),y)
 obj-$(CONFIG_USB_SISUSBVGA)           += font.o
 endif
-
-# Targets that kbuild needs to know about
-targets := promcon_tbl.c
-
-quiet_cmd_conmakehash = CNMKHSH $@
-      cmd_conmakehash = scripts/conmakehash $< | \
-		sed -e '/\#include <[^>]*>/p' -e 's/types/init/' \
-		-e 's/dfont\(_uni.*\]\)/promfont\1 /' > $@
-
-$(obj)/promcon_tbl.c: $(src)/prom.uni
-	$(call cmd,conmakehash)
--- a/drivers/video/console/promcon.c
+++ /dev/null
@@ -1,598 +0,0 @@
-/* $Id: promcon.c,v 1.17 2000/07/26 23:02:52 davem Exp $
- * Console driver utilizing PROM sun terminal emulation
- *
- * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
- * Copyright (C) 1998  Jakub Jelinek  (jj@ultra.linux.cz)
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/console.h>
-#include <linux/vt_kern.h>
-#include <linux/selection.h>
-#include <linux/fb.h>
-#include <linux/init.h>
-#include <linux/kd.h>
-
-#include <asm/oplib.h>
-#include <asm/uaccess.h>
-
-static short pw = 80 - 1, ph = 34 - 1;
-static short px, py;
-static unsigned long promcon_uni_pagedir[2];
-
-extern u8 promfont_unicount[];
-extern u16 promfont_unitable[];
-
-#define PROMCON_COLOR 0
-
-#if PROMCON_COLOR
-#define inverted(s)	((((s) & 0x7700) == 0x0700) ? 0 : 1)
-#else
-#define inverted(s)	(((s) & 0x0800) ? 1 : 0)
-#endif
-
-static __inline__ void
-promcon_puts(char *buf, int cnt)
-{
-	prom_printf("%*.*s", cnt, cnt, buf);
-}
-
-static int
-promcon_start(struct vc_data *conp, char *b)
-{
-	unsigned short *s = (unsigned short *)
-			(conp->vc_origin + py * conp->vc_size_row + (px << 1));
-	u16 cs;
-
-	cs = scr_readw(s);
-	if (px == pw) {
-		unsigned short *t = s - 1;
-		u16 ct = scr_readw(t);
-
-		if (inverted(cs) && inverted(ct))
-			return sprintf(b, "\b\033[7m%c\b\033[@%c\033[m", cs,
-				       ct);
-		else if (inverted(cs))
-			return sprintf(b, "\b\033[7m%c\033[m\b\033[@%c", cs,
-				       ct);
-		else if (inverted(ct))
-			return sprintf(b, "\b%c\b\033[@\033[7m%c\033[m", cs,
-				       ct);
-		else
-			return sprintf(b, "\b%c\b\033[@%c", cs, ct);
-	}
-
-	if (inverted(cs))
-		return sprintf(b, "\033[7m%c\033[m\b", cs);
-	else
-		return sprintf(b, "%c\b", cs);
-}
-
-static int
-promcon_end(struct vc_data *conp, char *b)
-{
-	unsigned short *s = (unsigned short *)
-			(conp->vc_origin + py * conp->vc_size_row + (px << 1));
-	char *p = b;
-	u16 cs;
-
-	b += sprintf(b, "\033[%d;%dH", py + 1, px + 1);
-
-	cs = scr_readw(s);
-	if (px == pw) {
-		unsigned short *t = s - 1;
-		u16 ct = scr_readw(t);
-
-		if (inverted(cs) && inverted(ct))
-			b += sprintf(b, "\b%c\b\033[@\033[7m%c\033[m", cs, ct);
-		else if (inverted(cs))
-			b += sprintf(b, "\b%c\b\033[@%c", cs, ct);
-		else if (inverted(ct))
-			b += sprintf(b, "\b\033[7m%c\b\033[@%c\033[m", cs, ct);
-		else
-			b += sprintf(b, "\b\033[7m%c\033[m\b\033[@%c", cs, ct);
-		return b - p;
-	}
-
-	if (inverted(cs))
-		b += sprintf(b, "%c\b", cs);
-	else
-		b += sprintf(b, "\033[7m%c\033[m\b", cs);
-	return b - p;
-}
-
-const char *promcon_startup(void)
-{
-	const char *display_desc = "PROM";
-	int node;
-	char buf[40];
-	
-	node = prom_getchild(prom_root_node);
-	node = prom_searchsiblings(node, "options");
-	if (prom_getproperty(node,  "screen-#columns", buf, 40) != -1) {
-		pw = simple_strtoul(buf, NULL, 0);
-		if (pw < 10 || pw > 256)
-			pw = 80;
-		pw--;
-	}
-	if (prom_getproperty(node,  "screen-#rows", buf, 40) != -1) {
-		ph = simple_strtoul(buf, NULL, 0);
-		if (ph < 10 || ph > 256)
-			ph = 34;
-		ph--;
-	}
-	promcon_puts("\033[H\033[J", 6);
-	return display_desc;
-}
-
-static void
-promcon_init_unimap(struct vc_data *conp)
-{
-	mm_segment_t old_fs = get_fs();
-	struct unipair *p, *p1;
-	u16 *q;
-	int i, j, k;
-	
-	p = kmalloc(256*sizeof(struct unipair), GFP_KERNEL);
-	if (!p) return;
-	
-	q = promfont_unitable;
-	p1 = p;
-	k = 0;
-	for (i = 0; i < 256; i++)
-		for (j = promfont_unicount[i]; j; j--) {
-			p1->unicode = *q++;
-			p1->fontpos = i;
-			p1++;
-			k++;
-		}
-	set_fs(KERNEL_DS);
-	con_clear_unimap(conp, NULL);
-	con_set_unimap(conp, k, p);
-	con_protect_unimap(conp, 1);
-	set_fs(old_fs);
-	kfree(p);
-}
-
-static void
-promcon_init(struct vc_data *conp, int init)
-{
-	unsigned long p;
-	
-	conp->vc_can_do_color = PROMCON_COLOR;
-	if (init) {
-		conp->vc_cols = pw + 1;
-		conp->vc_rows = ph + 1;
-	}
-	p = *conp->vc_uni_pagedir_loc;
-	if (conp->vc_uni_pagedir_loc == &conp->vc_uni_pagedir ||
-	    !--conp->vc_uni_pagedir_loc[1])
-		con_free_unimap(conp);
-	conp->vc_uni_pagedir_loc = promcon_uni_pagedir;
-	promcon_uni_pagedir[1]++;
-	if (!promcon_uni_pagedir[0] && p) {
-		promcon_init_unimap(conp);
-	}
-	if (!init) {
-		if (conp->vc_cols != pw + 1 || conp->vc_rows != ph + 1)
-			vc_resize(conp, pw + 1, ph + 1);
-	}
-}
-
-static void
-promcon_deinit(struct vc_data *conp)
-{
-	/* When closing the last console, reset video origin */
-	if (!--promcon_uni_pagedir[1])
-		con_free_unimap(conp);
-	conp->vc_uni_pagedir_loc = &conp->vc_uni_pagedir;
-	con_set_default_unimap(conp);
-}
-
-static int
-promcon_switch(struct vc_data *conp)
-{
-	return 1;
-}
-
-static unsigned short *
-promcon_repaint_line(unsigned short *s, unsigned char *buf, unsigned char **bp)
-{
-	int cnt = pw + 1;
-	int attr = -1;
-	unsigned char *b = *bp;
-
-	while (cnt--) {
-		u16 c = scr_readw(s);
-		if (attr != inverted(c)) {
-			attr = inverted(c);
-			if (attr) {
-				strcpy (b, "\033[7m");
-				b += 4;
-			} else {
-				strcpy (b, "\033[m");
-				b += 3;
-			}
-		}
-		*b++ = c;
-		s++;
-		if (b - buf >= 224) {
-			promcon_puts(buf, b - buf);
-			b = buf;
-		}
-	}
-	*bp = b;
-	return s;
-}
-
-static void
-promcon_putcs(struct vc_data *conp, const unsigned short *s,
-	      int count, int y, int x)
-{
-	unsigned char buf[256], *b = buf;
-	unsigned short attr = scr_readw(s);
-	unsigned char save;
-	int i, last = 0;
-
-	if (console_blanked)
-		return;
-	
-	if (count <= 0)
-		return;
-
-	b += promcon_start(conp, b);
-
-	if (x + count >= pw + 1) {
-		if (count == 1) {
-			x -= 1;
-			save = scr_readw((unsigned short *)(conp->vc_origin
-						   + y * conp->vc_size_row
-						   + (x << 1)));
-
-			if (px != x || py != y) {
-				b += sprintf(b, "\033[%d;%dH", y + 1, x + 1);
-				px = x;
-				py = y;
-			}
-
-			if (inverted(attr))
-				b += sprintf(b, "\033[7m%c\033[m", scr_readw(s++));
-			else
-				b += sprintf(b, "%c", scr_readw(s++));
-
-			strcpy(b, "\b\033[@");
-			b += 4;
-
-			if (inverted(save))
-				b += sprintf(b, "\033[7m%c\033[m", save);
-			else
-				b += sprintf(b, "%c", save);
-
-			px++;
-
-			b += promcon_end(conp, b);
-			promcon_puts(buf, b - buf);
-			return;
-		} else {
-			last = 1;
-			count = pw - x - 1;
-		}
-	}
-
-	if (inverted(attr)) {
-		strcpy(b, "\033[7m");
-		b += 4;
-	}
-
-	if (px != x || py != y) {
-		b += sprintf(b, "\033[%d;%dH", y + 1, x + 1);
-		px = x;
-		py = y;
-	}
-
-	for (i = 0; i < count; i++) {
-		if (b - buf >= 224) {
-			promcon_puts(buf, b - buf);
-			b = buf;
-		}
-		*b++ = scr_readw(s++);
-	}
-
-	px += count;
-
-	if (last) {
-		save = scr_readw(s++);
-		b += sprintf(b, "%c\b\033[@%c", scr_readw(s++), save);
-		px++;
-	}
-
-	if (inverted(attr)) {
-		strcpy(b, "\033[m");
-		b += 3;
-	}
-
-	b += promcon_end(conp, b);
-	promcon_puts(buf, b - buf);
-}
-
-static void
-promcon_putc(struct vc_data *conp, int c, int y, int x)
-{
-	unsigned short s;
-
-	if (console_blanked)
-		return;
-	
-	scr_writew(c, &s);
-	promcon_putcs(conp, &s, 1, y, x);
-}
-
-static void
-promcon_clear(struct vc_data *conp, int sy, int sx, int height, int width)
-{
-	unsigned char buf[256], *b = buf;
-	int i, j;
-
-	if (console_blanked)
-		return;
-	
-	b += promcon_start(conp, b);
-
-	if (!sx && width == pw + 1) {
-
-		if (!sy && height == ph + 1) {
-			strcpy(b, "\033[H\033[J");
-			b += 6;
-			b += promcon_end(conp, b);
-			promcon_puts(buf, b - buf);
-			return;
-		} else if (sy + height == ph + 1) {
-			b += sprintf(b, "\033[%dH\033[J", sy + 1);
-			b += promcon_end(conp, b);
-			promcon_puts(buf, b - buf);
-			return;
-		}
-
-		b += sprintf(b, "\033[%dH", sy + 1);
-		for (i = 1; i < height; i++) {
-			strcpy(b, "\033[K\n");
-			b += 4;
-		}
-
-		strcpy(b, "\033[K");
-		b += 3;
-
-		b += promcon_end(conp, b);
-		promcon_puts(buf, b - buf);
-		return;
-
-	} else if (sx + width == pw + 1) {
-
-		b += sprintf(b, "\033[%d;%dH", sy + 1, sx + 1);
-		for (i = 1; i < height; i++) {
-			strcpy(b, "\033[K\n");
-			b += 4;
-		}
-
-		strcpy(b, "\033[K");
-		b += 3;
-
-		b += promcon_end(conp, b);
-		promcon_puts(buf, b - buf);
-		return;
-	}
-
-	for (i = sy + 1; i <= sy + height; i++) {
-		b += sprintf(b, "\033[%d;%dH", i, sx + 1);
-		for (j = 0; j < width; j++)
-			*b++ = ' ';
-		if (b - buf + width >= 224) {
-			promcon_puts(buf, b - buf);
-			b = buf;
-		}
-	}
-
-	b += promcon_end(conp, b);
-	promcon_puts(buf, b - buf);
-}
-                        
-static void
-promcon_bmove(struct vc_data *conp, int sy, int sx, int dy, int dx,
-	      int height, int width)
-{
-	char buf[256], *b = buf;
-
-	if (console_blanked)
-		return;
-	
-	b += promcon_start(conp, b);
-	if (sy == dy && height == 1) {
-		if (dx > sx && dx + width == conp->vc_cols)
-			b += sprintf(b, "\033[%d;%dH\033[%d@\033[%d;%dH",
-				     sy + 1, sx + 1, dx - sx, py + 1, px + 1);
-		else if (dx < sx && sx + width == conp->vc_cols)
-			b += sprintf(b, "\033[%d;%dH\033[%dP\033[%d;%dH",
-				     dy + 1, dx + 1, sx - dx, py + 1, px + 1);
-
-		b += promcon_end(conp, b);
-		promcon_puts(buf, b - buf);
-		return;
-	}
-
-	/*
-	 * FIXME: What to do here???
-	 * Current console.c should not call it like that ever.
-	 */
-	prom_printf("\033[7mFIXME: bmove not handled\033[m\n");
-}
-
-static void
-promcon_cursor(struct vc_data *conp, int mode)
-{
-	char buf[32], *b = buf;
-
-	switch (mode) {
-	case CM_ERASE:
-		break;
-
-	case CM_MOVE:
-	case CM_DRAW:
-		b += promcon_start(conp, b);
-		if (px != conp->vc_x || py != conp->vc_y) {
-			px = conp->vc_x;
-			py = conp->vc_y;
-			b += sprintf(b, "\033[%d;%dH", py + 1, px + 1);
-		}
-		promcon_puts(buf, b - buf);
-		break;
-	}
-}
-
-static int
-promcon_blank(struct vc_data *conp, int blank, int mode_switch)
-{
-	if (blank) {
-		promcon_puts("\033[H\033[J\033[7m \033[m\b", 15);
-		return 0;
-	} else {
-		/* Let console.c redraw */
-		return 1;
-	}
-}
-
-static int
-promcon_scroll(struct vc_data *conp, int t, int b, int dir, int count)
-{
-	unsigned char buf[256], *p = buf;
-	unsigned short *s;
-	int i;
-
-	if (console_blanked)
-		return 0;
-	
-	p += promcon_start(conp, p);
-
-	switch (dir) {
-	case SM_UP:
-		if (b == ph + 1) {
-			p += sprintf(p, "\033[%dH\033[%dM", t + 1, count);
-			px = 0;
-			py = t;
-			p += promcon_end(conp, p);
-			promcon_puts(buf, p - buf);
-			break;
-		}
-
-		s = (unsigned short *)(conp->vc_origin
-				       + (t + count) * conp->vc_size_row);
-
-		p += sprintf(p, "\033[%dH", t + 1);
-
-		for (i = t; i < b - count; i++)
-			s = promcon_repaint_line(s, buf, &p);
-
-		for (; i < b - 1; i++) {
-			strcpy(p, "\033[K\n");
-			p += 4;
-			if (p - buf >= 224) {
-				promcon_puts(buf, p - buf);
-				p = buf;
-			}
-		}
-
-		strcpy(p, "\033[K");
-		p += 3;
-
-		p += promcon_end(conp, p);
-		promcon_puts(buf, p - buf);
-		break;
-
-	case SM_DOWN:
-		if (b == ph + 1) {
-			p += sprintf(p, "\033[%dH\033[%dL", t + 1, count);
-			px = 0;
-			py = t;
-			p += promcon_end(conp, p);
-			promcon_puts(buf, p - buf);
-			break;
-		}
-
-		s = (unsigned short *)(conp->vc_origin + t * conp->vc_size_row);
-
-		p += sprintf(p, "\033[%dH", t + 1);
-
-		for (i = t; i < t + count; i++) {
-			strcpy(p, "\033[K\n");
-			p += 4;
-			if (p - buf >= 224) {
-				promcon_puts(buf, p - buf);
-				p = buf;
-			}
-		}
-
-		for (; i < b; i++)
-			s = promcon_repaint_line(s, buf, &p);
-
-		p += promcon_end(conp, p);
-		promcon_puts(buf, p - buf);
-		break;
-	}
-
-	return 0;
-}
-
-#if !(PROMCON_COLOR)
-static u8 promcon_build_attr(struct vc_data *conp, u8 _color, u8 _intensity,
-    u8 _blink, u8 _underline, u8 _reverse, u8 _italic)
-{
-	return (_reverse) ? 0xf : 0x7;
-}
-#endif
-
-/*
- *  The console 'switch' structure for the VGA based console
- */
-
-static int promcon_dummy(void)
-{
-        return 0;
-}
-
-#define DUMMY (void *) promcon_dummy
-
-const struct consw prom_con = {
-	.owner =		THIS_MODULE,
-	.con_startup =		promcon_startup,
-	.con_init =		promcon_init,
-	.con_deinit =		promcon_deinit,
-	.con_clear =		promcon_clear,
-	.con_putc =		promcon_putc,
-	.con_putcs =		promcon_putcs,
-	.con_cursor =		promcon_cursor,
-	.con_scroll =		promcon_scroll,
-	.con_bmove =		promcon_bmove,
-	.con_switch =		promcon_switch,
-	.con_blank =		promcon_blank,
-	.con_set_palette =	DUMMY,
-	.con_scrolldelta =	DUMMY,
-#if !(PROMCON_COLOR)
-	.con_build_attr =	promcon_build_attr,
-#endif
-};
-
-void __init prom_con_init(void)
-{
-#ifdef CONFIG_DUMMY_CONSOLE
-	if (conswitchp == &dummy_con)
-		take_over_console(&prom_con, 0, MAX_NR_CONSOLES-1, 1);
-	else
-#endif
-	if (conswitchp == &prom_con)
-		promcon_init_unimap(vc_cons[fg_console].d);
-}
--- a/drivers/video/console/prom.uni
+++ /dev/null
@@ -1,11 +0,0 @@
-#
-# Unicode mapping table for font in Sun PROM
-# 
-#
-0x20-0x7e	idem
-0xa0-0xff	idem
-#
-0x7c		U+2502
-0x2d		U+2500
-0x2b		U+250c U+2510 U+2514 U+2518 U+251c U+2524 U+252c U+2534 U+253c
-0xa4		U+fffd
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -10,7 +10,6 @@
 hostprogs-$(CONFIG_KALLSYMS)     += kallsyms
 hostprogs-$(CONFIG_LOGO)         += pnmtologo
 hostprogs-$(CONFIG_VT)           += conmakehash
-hostprogs-$(CONFIG_PROM_CONSOLE) += conmakehash
 hostprogs-$(CONFIG_IKCONFIG)     += bin2c
 
 always		:= $(hostprogs-y) $(hostprogs-m)