linux-kernel - [PATCH] [RFC] OMAP1: AMS

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Message-Id: <200907040206.42940.jkrzyszt@tis.icnet.pl>
Date:	Sat, 4 Jul 2009 02:06:42 +0200
From:	Janusz Krzysztofik <jkrzyszt@....icnet.pl>
To:	Jonathan McDowell <noodles@...th.li>
Cc:	Tony Lindgren <tony@...mide.com>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	linux-serial@...r.kernel.org,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] [RFC] OMAP1: AMS_DELTA: add modem support

This patch adds support for modem device found on Amstrad E3 (Delta) board.

Patch created against linux-2.6.31-rc1.

Based on earlier patch by Jonathan McDowell, available at 
http://the.earth.li/pub/e3/2.6.19/ams-delta-modem.patch.
Modified after Ladislav Michl's arch/arm/mach-omap1/board-voiceblue.c.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@....icnet.pl>
---
Registering the modem platform device from a separate arch_initcall (and not from machine_init() callback) preserves serial console port 
at ttyS0.

--- linux-2.6.31-rc1/arch/arm/mach-omap1/board-ams-delta.c.orig	2009-06-27 20:19:50.000000000 +0200
+++ linux-2.6.31-rc1/arch/arm/mach-omap1/board-ams-delta.c	2009-07-04 00:50:46.000000000 +0200
@@ -15,8 +15,11 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/input.h>
+#include <linux/irq.h>
 #include <linux/platform_device.h>
+#include <linux/serial_8250.h>
 
+#include <asm/serial.h>
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -233,7 +236,39 @@ static void __init ams_delta_init(void)
 
 	omap_usb_init(&ams_delta_usb_config);
 	platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices));
+
+}
+
+static struct plat_serial8250_port ams_delta_modem_ports[] = {
+	{
+		.membase	= (void *) AMS_DELTA_MODEM_VIRT,
+		.mapbase	= AMS_DELTA_MODEM_PHYS,
+		.irq		= OMAP_GPIO_IRQ(2),
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 1,
+		.uartclk	= BASE_BAUD * 16,
+	},
+	{ },
+};
+
+static struct platform_device ams_delta_modem_device = {
+	.name	= "serial8250",
+	.id	= PLAT8250_DEV_PLATFORM1,
+	.dev		= {
+		.platform_data = ams_delta_modem_ports,
+	},
+};
+
+static int __init ams_delta_modem_init(void)
+{
+	set_irq_type(OMAP_GPIO_IRQ(2), IRQ_TYPE_EDGE_RISING);
+	ams_delta_latch2_write(
+		AMS_DELTA_LATCH2_MODEM_NRESET | AMS_DELTA_LATCH2_MODEM_CODEC,
+		AMS_DELTA_LATCH2_MODEM_NRESET | AMS_DELTA_LATCH2_MODEM_CODEC);
+	return platform_device_register(&ams_delta_modem_device);
 }
+arch_initcall(ams_delta_modem_init);
 
 static void __init ams_delta_map_io(void)
 {
--
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