1c9cf6f986
We are currently reserving one byte more than actually needed by the flash device and overlapping into the next I/O expansion bus window. This a) causes us to allocate an extra page of VM due to ARM ioremap() alignment code and b) could cause problems if another driver tries to request the next expansion bus window. Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
155 lines
3.8 KiB
C
155 lines
3.8 KiB
C
/*
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* arch/arm/mach-ixp4xx/gtwx5715-setup.c
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*
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* Gemtek GTWX5715 (Linksys WRV54G) board settup
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*
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* Copyright (C) 2004 George T. Joseph
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* Derived from Coyote
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/serial.h>
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#include <linux/tty.h>
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#include <linux/serial_8250.h>
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#include <asm/types.h>
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#include <asm/setup.h>
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#include <asm/memory.h>
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#include <asm/hardware.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/flash.h>
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#include <asm/arch/gtwx5715.h>
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/*
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* Xscale UART registers are 32 bits wide with only the least
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* significant 8 bits having any meaning. From a configuration
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* perspective, this means 2 things...
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*
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* Setting .regshift = 2 so that the standard 16550 registers
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* line up on every 4th byte.
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*
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* Shifting the register start virtual address +3 bytes when
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* compiled big-endian. Since register writes are done on a
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* single byte basis, if the shift isn't done the driver will
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* write the value into the most significant byte of the register,
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* which is ignored, instead of the least significant.
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*/
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#ifdef __ARMEB__
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#define REG_OFFSET 3
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#else
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#define REG_OFFSET 0
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#endif
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/*
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* Only the second or "console" uart is connected on the gtwx5715.
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*/
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static struct resource gtwx5715_uart_resources[] = {
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{
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.start = IXP4XX_UART2_BASE_PHYS,
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.end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = IRQ_IXP4XX_UART2,
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.end = IRQ_IXP4XX_UART2,
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.flags = IORESOURCE_IRQ,
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},
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{ },
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};
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static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
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{
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.mapbase = IXP4XX_UART2_BASE_PHYS,
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.membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
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.irq = IRQ_IXP4XX_UART2,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = IXP4XX_UART_XTAL,
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},
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{ },
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};
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static struct platform_device gtwx5715_uart_device = {
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.name = "serial8250",
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.id = 0,
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.dev = {
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.platform_data = gtwx5715_uart_platform_data,
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},
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.num_resources = 2,
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.resource = gtwx5715_uart_resources,
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};
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void __init gtwx5715_map_io(void)
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{
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ixp4xx_map_io();
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}
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static struct flash_platform_data gtwx5715_flash_data = {
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.map_name = "cfi_probe",
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.width = 2,
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};
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static struct resource gtwx5715_flash_resource = {
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.start = GTWX5715_FLASH_BASE,
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.end = GTWX5715_FLASH_BASE + GTWX5715_FLASH_SIZE - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device gtwx5715_flash = {
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.name = "IXP4XX-Flash",
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.id = 0,
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.dev = {
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.platform_data = >wx5715_flash_data,
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},
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.num_resources = 1,
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.resource = >wx5715_flash_resource,
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};
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static struct platform_device *gtwx5715_devices[] __initdata = {
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>wx5715_uart_device,
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>wx5715_flash,
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};
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static void __init gtwx5715_init(void)
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{
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platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
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}
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MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
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/* Maintainer: George Joseph */
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.phys_ram = PHYS_OFFSET,
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.phys_io = IXP4XX_UART2_BASE_PHYS,
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.io_pg_offst = ((IXP4XX_UART2_BASE_VIRT) >> 18) & 0xfffc,
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.map_io = gtwx5715_map_io,
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.init_irq = ixp4xx_init_irq,
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.timer = &ixp4xx_timer,
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.boot_params = 0x0100,
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.init_machine = gtwx5715_init,
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MACHINE_END
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