[POWERPC] Celleb: setup sio in SCC

/*

 * 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);