1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/*
|
|
* arch/sh64/kernel/early_printk.c
|
|
*
|
|
* SH-5 Early SCIF console (cloned and hacked from sh implementation)
|
|
*
|
|
* Copyright (C) 2003, 2004 Paul Mundt <lethal@linux-sh.org>
|
|
* Copyright (C) 2002 M. R. Brown <mrbrown@0xd6.org>
|
|
*
|
|
* 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/console.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/init.h>
|
|
#include <asm/io.h>
|
|
#include <asm/hardware.h>
|
|
|
|
#define SCIF_BASE_ADDR 0x01030000
|
|
#define SCIF_ADDR_SH5 PHYS_PERIPHERAL_BLOCK+SCIF_BASE_ADDR
|
|
|
|
/*
|
|
* Fixed virtual address where SCIF is mapped (should already be done
|
|
* in arch/sh64/kernel/head.S!).
|
|
*/
|
|
#define SCIF_REG 0xfa030000
|
|
|
|
enum {
|
|
SCIF_SCSMR2 = SCIF_REG + 0x00,
|
|
SCIF_SCBRR2 = SCIF_REG + 0x04,
|
|
SCIF_SCSCR2 = SCIF_REG + 0x08,
|
|
SCIF_SCFTDR2 = SCIF_REG + 0x0c,
|
|
SCIF_SCFSR2 = SCIF_REG + 0x10,
|
|
SCIF_SCFRDR2 = SCIF_REG + 0x14,
|
|
SCIF_SCFCR2 = SCIF_REG + 0x18,
|
|
SCIF_SCFDR2 = SCIF_REG + 0x1c,
|
|
SCIF_SCSPTR2 = SCIF_REG + 0x20,
|
|
SCIF_SCLSR2 = SCIF_REG + 0x24,
|
|
};
|
|
|
|
static void sh_console_putc(int c)
|
|
{
|
|
while (!(ctrl_inw(SCIF_SCFSR2) & 0x20))
|
|
cpu_relax();
|
|
|
|
ctrl_outb(c, SCIF_SCFTDR2);
|
|
ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0x9f), SCIF_SCFSR2);
|
|
|
|
if (c == '\n')
|
|
sh_console_putc('\r');
|
|
}
|
|
|
|
static void sh_console_flush(void)
|
|
{
|
|
ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0xbf), SCIF_SCFSR2);
|
|
|
|
while (!(ctrl_inw(SCIF_SCFSR2) & 0x40))
|
|
cpu_relax();
|
|
|
|
ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0xbf), SCIF_SCFSR2);
|
|
}
|
|
|
|
static void sh_console_write(struct console *con, const char *s, unsigned count)
|
|
{
|
|
while (count-- > 0)
|
|
sh_console_putc(*s++);
|
|
|
|
sh_console_flush();
|
|
}
|
|
|
|
static int __init sh_console_setup(struct console *con, char *options)
|
|
{
|
|
con->cflag = CREAD | HUPCL | CLOCAL | B19200 | CS8;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct console sh_console = {
|
|
.name = "scifcon",
|
|
.write = sh_console_write,
|
|
.setup = sh_console_setup,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
|
|
void __init enable_early_printk(void)
|
|
{
|
|
ctrl_outb(0x2a, SCIF_SCBRR2); /* 19200bps */
|
|
|
|
ctrl_outw(0x04, SCIF_SCFCR2); /* Reset TFRST */
|
|
ctrl_outw(0x10, SCIF_SCFCR2); /* TTRG0=1 */
|
|
|
|
ctrl_outw(0, SCIF_SCSPTR2);
|
|
ctrl_outw(0x60, SCIF_SCFSR2);
|
|
ctrl_outw(0, SCIF_SCLSR2);
|
|
ctrl_outw(0x30, SCIF_SCSCR2);
|
|
|
|
register_console(&sh_console);
|
|
}
|
|
|
|
void disable_early_printk(void)
|
|
{
|
|
unregister_console(&sh_console);
|
|
}
|
|
|