f6ba061060
Commit 225ae5fd9a
"MIPS: Malta: Fix interupt number of CBUS UART"
fixed the IRQ number for the ttyS2 CBUS UART. However, this now
conflicts with the GIC IPI1 interrupt in CMP platforms. The Malta
interrupt code arbitrarily binds IPIs to INT2 and INT3 and since
ttyS2 uses the INT2 IRQ line, closing the device disables the
INT2 interrupt and this effectively disables the IPI1 interrupt
as well. This patch is mainly a workaround until the Malta code
is fixed properly.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6045/
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2006, 07 MIPS Technologies, Inc.
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* written by Ralf Baechle (ralf@linux-mips.org)
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* written by Ralf Baechle <ralf@linux-mips.org>
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*
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* Copyright (C) 2008 Wind River Systems, Inc.
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* updated by Tiejun Chen <tiejun.chen@windriver.com>
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*
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* 1. Probe driver for the Malta's UART ports:
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*
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* o 2 ports in the SMC SuperIO
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* o 1 port in the CBUS UART, a discrete 16550 which normally is only used
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* for bringups.
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*
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* We don't use 8250_platform.c on Malta as it would result in the CBUS
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* UART becoming ttyS0.
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*
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* 2. Register RTC-CMOS platform device on Malta.
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*/
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#include <linux/init.h>
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#include <linux/serial_8250.h>
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#include <linux/mc146818rtc.h>
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#include <linux/module.h>
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#include <linux/irq.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/platform_device.h>
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#include <asm/mips-boards/maltaint.h>
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#include <mtd/mtd-abi.h>
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#define SMC_PORT(base, int) \
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{ \
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.iobase = base, \
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.irq = int, \
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.uartclk = 1843200, \
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.iotype = UPIO_PORT, \
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
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.regshift = 0, \
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}
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#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
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static struct plat_serial8250_port uart8250_data[] = {
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SMC_PORT(0x3F8, 4),
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SMC_PORT(0x2F8, 3),
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#ifndef CONFIG_MIPS_CMP
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{
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.mapbase = 0x1f000900, /* The CBUS UART */
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.irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
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.uartclk = 3686400, /* Twice the usual clk! */
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.iotype = UPIO_MEM32,
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.flags = CBUS_UART_FLAGS,
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.regshift = 3,
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},
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#endif
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{ },
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};
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static struct platform_device malta_uart8250_device = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev = {
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.platform_data = uart8250_data,
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},
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};
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struct resource malta_rtc_resources[] = {
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{
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.start = RTC_PORT(0),
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.end = RTC_PORT(7),
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.flags = IORESOURCE_IO,
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}, {
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.start = RTC_IRQ,
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.end = RTC_IRQ,
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct platform_device malta_rtc_device = {
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.name = "rtc_cmos",
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.id = -1,
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.resource = malta_rtc_resources,
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.num_resources = ARRAY_SIZE(malta_rtc_resources),
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};
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static struct mtd_partition malta_mtd_partitions[] = {
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{
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.name = "YAMON",
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.offset = 0x0,
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.size = 0x100000,
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.mask_flags = MTD_WRITEABLE
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}, {
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.name = "User FS",
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.offset = 0x100000,
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.size = 0x2e0000
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}, {
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.name = "Board Config",
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.offset = 0x3e0000,
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.size = 0x020000,
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.mask_flags = MTD_WRITEABLE
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}
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};
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static struct physmap_flash_data malta_flash_data = {
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.width = 4,
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.nr_parts = ARRAY_SIZE(malta_mtd_partitions),
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.parts = malta_mtd_partitions
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};
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static struct resource malta_flash_resource = {
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.start = 0x1e000000,
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.end = 0x1e3fffff,
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.flags = IORESOURCE_MEM
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};
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static struct platform_device malta_flash_device = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = &malta_flash_data,
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},
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.num_resources = 1,
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.resource = &malta_flash_resource,
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};
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static struct platform_device *malta_devices[] __initdata = {
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&malta_uart8250_device,
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&malta_rtc_device,
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&malta_flash_device,
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};
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static int __init malta_add_devices(void)
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{
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int err;
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err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
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if (err)
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return err;
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return 0;
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}
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device_initcall(malta_add_devices);
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