This patch adds support for modem device found on Amstrad E3 (Delta) board.
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.
This version, unlike v2, is dependent on 8250 driver changes getting accepted
upstream:
Refer: http://patchwork.kernel.org/patch/31884/
Signed-off-by: Janusz Krzysztofik <[email protected]>
---
Registering the modem platform device from a separate arch_initcall (and not
from init_machine() callback) preserves serial console port at ttyS0.
OMAP mux pin set up just for case if Amstrad bootloader is ever replaced.
Warning:
could cause compilation break if 8250 patch is not integrated first
--- linux-2.6.31-rc1/arch/arm/mach-omap1/board-ams-delta.c.orig 2009-07-04 16:39:37.000000000 +0200
+++ linux-2.6.31-rc1/arch/arm/mach-omap1/board-ams-delta.c 2009-07-05 13:41:08.000000000 +0200
@@ -15,8 +15,11 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/input.h>
+#include <linux/interrupt.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>
@@ -235,6 +238,41 @@ static void __init ams_delta_init(void)
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 = -EINVAL, /* changed later */
+ .flags = UPF_BOOT_AUTOCONF,
+ .irqflags = IRQF_TRIGGER_RISING,
+ .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)
+{
+ omap_cfg_reg(M14_1510_GPIO2);
+ ams_delta_modem_ports[0].irq = gpio_to_irq(2);
+
+ 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)
{
omap1_map_common_io();