cc761beda2
Thecus N2100 has a jumper (J3/J4) to select whether the XINT1 interrupt line is connected to the second UHCI controller (position J3) or to the serial port UART (position J4). Currently, the kernel is hardcoded to assume the J3 position, and the serial port is always being used in polling mode. The patch adds the IRQ autodetection flag for the serial port interrupt, and also marks it as shared (as the driver for the second UHCI controller will request the interrupt in any case). Now, when the jumper is set to the J4 position, the serial port will have an interrupt line, resulting in less CPU overhead and faster throughput. Tested-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
338 lines
7.5 KiB
C
338 lines
7.5 KiB
C
/*
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* arch/arm/mach-iop32x/n2100.c
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*
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* Board support code for the Thecus N2100 platform.
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*
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* Author: Rory Bolt <rorybolt@pacbell.net>
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* Copyright (C) 2002 Rory Bolt
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* Copyright 2003 (c) MontaVista, Software, Inc.
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* Copyright (C) 2004 Intel Corp.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/f75375s.h>
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#include <linux/leds-pca9532.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/pm.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/serial_core.h>
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#include <linux/serial_8250.h>
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#include <linux/mtd/physmap.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/reboot.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/pci.h>
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#include <asm/mach/time.h>
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#include <asm/mach-types.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <mach/time.h>
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/*
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* N2100 timer tick configuration.
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*/
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static void __init n2100_timer_init(void)
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{
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/* 33.000 MHz crystal. */
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iop_init_time(198000000);
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}
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static struct sys_timer n2100_timer = {
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.init = n2100_timer_init,
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};
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/*
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* N2100 I/O.
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*/
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static struct map_desc n2100_io_desc[] __initdata = {
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{ /* on-board devices */
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.virtual = N2100_UART,
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.pfn = __phys_to_pfn(N2100_UART),
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.length = 0x00100000,
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.type = MT_DEVICE
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},
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};
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void __init n2100_map_io(void)
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{
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iop3xx_map_io();
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iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
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}
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/*
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* N2100 PCI.
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*/
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static int __init
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n2100_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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int irq;
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if (PCI_SLOT(dev->devfn) == 1) {
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/* RTL8110SB #1 */
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irq = IRQ_IOP32X_XINT0;
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} else if (PCI_SLOT(dev->devfn) == 2) {
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/* RTL8110SB #2 */
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irq = IRQ_IOP32X_XINT3;
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} else if (PCI_SLOT(dev->devfn) == 3) {
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/* Sil3512 */
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irq = IRQ_IOP32X_XINT2;
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} else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
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/* VT6212 INTA */
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irq = IRQ_IOP32X_XINT1;
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} else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
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/* VT6212 INTB */
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irq = IRQ_IOP32X_XINT0;
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} else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
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/* VT6212 INTC */
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irq = IRQ_IOP32X_XINT2;
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} else if (PCI_SLOT(dev->devfn) == 5) {
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/* Mini-PCI slot */
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irq = IRQ_IOP32X_XINT3;
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} else {
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printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
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"device PCI:%d:%d:%d\n", dev->bus->number,
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PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
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irq = -1;
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}
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return irq;
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}
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static struct hw_pci n2100_pci __initdata = {
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.swizzle = pci_std_swizzle,
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.nr_controllers = 1,
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.setup = iop3xx_pci_setup,
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.preinit = iop3xx_pci_preinit,
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.scan = iop3xx_pci_scan_bus,
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.map_irq = n2100_pci_map_irq,
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};
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/*
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* Both r8169 chips on the n2100 exhibit PCI parity problems. Set
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* the ->broken_parity_status flag for both ports so that the r8169
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* driver knows it should ignore error interrupts.
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*/
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static void n2100_fixup_r8169(struct pci_dev *dev)
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{
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if (dev->bus->number == 0 &&
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(dev->devfn == PCI_DEVFN(1, 0) ||
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dev->devfn == PCI_DEVFN(2, 0)))
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dev->broken_parity_status = 1;
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}
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DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
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static int __init n2100_pci_init(void)
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{
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if (machine_is_n2100())
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pci_common_init(&n2100_pci);
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return 0;
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}
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subsys_initcall(n2100_pci_init);
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/*
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* N2100 machine initialisation.
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*/
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static struct physmap_flash_data n2100_flash_data = {
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.width = 2,
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};
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static struct resource n2100_flash_resource = {
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.start = 0xf0000000,
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.end = 0xf0ffffff,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device n2100_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 = &n2100_flash_data,
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},
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.num_resources = 1,
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.resource = &n2100_flash_resource,
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};
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static struct plat_serial8250_port n2100_serial_port[] = {
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{
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.mapbase = N2100_UART,
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.membase = (char *)N2100_UART,
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.irq = 0,
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.flags = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
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.iotype = UPIO_MEM,
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.regshift = 0,
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.uartclk = 1843200,
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},
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{ },
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};
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static struct resource n2100_uart_resource = {
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.start = N2100_UART,
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.end = N2100_UART + 7,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device n2100_serial_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 = n2100_serial_port,
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},
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.num_resources = 1,
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.resource = &n2100_uart_resource,
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};
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static struct f75375s_platform_data n2100_f75375s = {
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.pwm = { 255, 255 },
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.pwm_enable = { 0, 0 },
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};
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static struct pca9532_platform_data n2100_leds = {
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.leds = {
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{ .name = "n2100:red:satafail0",
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.state = PCA9532_OFF,
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.type = PCA9532_TYPE_LED,
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},
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{ .name = "n2100:red:satafail1",
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.state = PCA9532_OFF,
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.type = PCA9532_TYPE_LED,
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},
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{ .name = "n2100:blue:usb",
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.state = PCA9532_OFF,
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.type = PCA9532_TYPE_LED,
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},
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{ .type = PCA9532_TYPE_NONE },
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{ .type = PCA9532_TYPE_NONE },
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{ .type = PCA9532_TYPE_NONE },
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{ .type = PCA9532_TYPE_NONE },
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{ .name = "n2100:red:usb",
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.state = PCA9532_OFF,
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.type = PCA9532_TYPE_LED,
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},
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{ .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
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{ .type = PCA9532_TYPE_NONE }, /* reset gpio */
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{ .type = PCA9532_TYPE_NONE },
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{ .type = PCA9532_TYPE_NONE },
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{ .type = PCA9532_TYPE_NONE },
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{ .name = "n2100:orange:system",
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.state = PCA9532_OFF,
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.type = PCA9532_TYPE_LED,
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},
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{ .name = "n2100:red:system",
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.state = PCA9532_OFF,
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.type = PCA9532_TYPE_LED,
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},
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{ .name = "N2100 beeper" ,
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.state = PCA9532_OFF,
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.type = PCA9532_TYPE_N2100_BEEP,
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},
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},
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.psc = { 0, 0 },
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.pwm = { 0, 0 },
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};
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static struct i2c_board_info __initdata n2100_i2c_devices[] = {
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{
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I2C_BOARD_INFO("rs5c372b", 0x32),
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},
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{
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I2C_BOARD_INFO("f75375", 0x2e),
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.platform_data = &n2100_f75375s,
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},
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{
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I2C_BOARD_INFO("pca9532", 0x60),
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.platform_data = &n2100_leds,
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},
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};
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/*
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* Pull PCA9532 GPIO #8 low to power off the machine.
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*/
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static void n2100_power_off(void)
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{
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local_irq_disable();
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/* Start condition, I2C address of PCA9532, write transaction. */
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*IOP3XX_IDBR0 = 0xc0;
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*IOP3XX_ICR0 = 0xe9;
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mdelay(1);
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/* Write address 0x08. */
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*IOP3XX_IDBR0 = 0x08;
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*IOP3XX_ICR0 = 0xe8;
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mdelay(1);
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/* Write data 0x01, stop condition. */
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*IOP3XX_IDBR0 = 0x01;
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*IOP3XX_ICR0 = 0xea;
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while (1)
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;
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}
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static struct timer_list power_button_poll_timer;
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static void power_button_poll(unsigned long dummy)
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{
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if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
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ctrl_alt_del();
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return;
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}
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power_button_poll_timer.expires = jiffies + (HZ / 10);
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add_timer(&power_button_poll_timer);
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}
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static void __init n2100_init_machine(void)
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{
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platform_device_register(&iop3xx_i2c0_device);
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platform_device_register(&n2100_flash_device);
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platform_device_register(&n2100_serial_device);
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platform_device_register(&iop3xx_dma_0_channel);
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platform_device_register(&iop3xx_dma_1_channel);
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i2c_register_board_info(0, n2100_i2c_devices,
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ARRAY_SIZE(n2100_i2c_devices));
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pm_power_off = n2100_power_off;
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init_timer(&power_button_poll_timer);
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power_button_poll_timer.function = power_button_poll;
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power_button_poll_timer.expires = jiffies + (HZ / 10);
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add_timer(&power_button_poll_timer);
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}
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MACHINE_START(N2100, "Thecus N2100")
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/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
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.phys_io = N2100_UART,
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.io_pg_offst = ((N2100_UART) >> 18) & 0xfffc,
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.boot_params = 0xa0000100,
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.map_io = n2100_map_io,
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.init_irq = iop32x_init_irq,
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.timer = &n2100_timer,
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.init_machine = n2100_init_machine,
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MACHINE_END
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