Re: [PATCH 12/19] powerpc: setup sio in SCC for Celleb

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Fri, 2007-01-12 at 10:12 +0900, Ishizaki Kou wrote:
> 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>

> ---
> 
> Index: linux-powerpc-git/arch/powerpc/platforms/celleb/scc_sio.c
> diff -u /dev/null linux-powerpc-git/arch/powerpc/platforms/celleb/scc_sio.c:1.5
> --- /dev/null	Thu Jan 11 22:03:27 2007
> +++ linux-powerpc-git/arch/powerpc/platforms/celleb/scc_sio.c	Wed Jan 10 17:48:12 2007
> @@ -0,0 +1,101 @@
> +/*
> + * 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);
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