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[POWERPC] Celleb: setup sio in SCC

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This patch setup serial interfaces in SCC to work with serial_txx9
driver.

Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Ishizaki Kou 2007-01-12 10:12:06 +09:00 committed by Paul Mackerras
parent 551a3d8785
commit 8b629a1f01
1 changed files with 101 additions and 0 deletions
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101
arch/powerpc/platforms/celleb/scc_sio.c Normal file
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/*
* setup serial port in SCC
*
* (C) Copyright 2006 TOSHIBA CORPORATION
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/console.h>
#include <asm/io.h>
#include <asm/prom.h>
/* sio irq0=0xb00010022 irq0=0xb00010023 irq2=0xb00010024
mmio=0xfff000-0x1000,0xff2000-0x1000 */
static int txx9_serial_bitmap = 0;
static struct {
uint32_t offset;
uint32_t index;
} txx9_scc_tab[3] = {
{ 0x300, 0 }, /* 0xFFF300 */
{ 0x400, 0 }, /* 0xFFF400 */
{ 0x800, 1 } /* 0xFF2800 */
};
static int txx9_serial_init(void)
{
extern int early_serial_txx9_setup(struct uart_port *port);
struct device_node *node;
int i;
struct uart_port req;
struct of_irq irq;
struct resource res;
node = of_find_node_by_path("/ioif1/sio");
if (!node)
return 0;
for(i = 0; i < sizeof(txx9_scc_tab)/sizeof(txx9_scc_tab[0]); i++) {
if (!(txx9_serial_bitmap & (1<<i)))
continue;
if (of_irq_map_one(node, i, &irq))
continue;
if (of_address_to_resource(node, txx9_scc_tab[i].index, &res))
continue;
memset(&req, 0, sizeof(req));
req.line = i;
req.iotype = UPIO_MEM;
req.mapbase = res.start + txx9_scc_tab[i].offset;
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
req.membase = ioremap(req.mapbase, 0x24);
#endif
req.irq = irq_create_of_mapping(irq.controller,
irq.specifier, irq.size);
req.flags |= UPF_IOREMAP | UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
req.uartclk = 83300000;
early_serial_txx9_setup(&req);
}
of_node_put(node);
return 0;
}
static int txx9_serial_config(char *ptr)
{
int i;
for (;;) {
switch(get_option(&ptr, &i)) {
default:
return 0;
case 2:
txx9_serial_bitmap |= 1 << i;
break;
case 1:
txx9_serial_bitmap |= 1 << i;
return 0;
}
}
}
__setup("txx9_serial=", txx9_serial_config);
console_initcall(txx9_serial_init);