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-rw-r--r--arch/arm/mach-ixp2000/ixdp2x00.c306
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diff --git a/arch/arm/mach-ixp2000/ixdp2x00.c b/arch/arm/mach-ixp2000/ixdp2x00.c
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--- a/arch/arm/mach-ixp2000/ixdp2x00.c
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-/*
- * arch/arm/mach-ixp2000/ixdp2x00.c
- *
- * Code common to IXDP2400 and IXDP2800 platforms.
- *
- * Original Author: Naeem Afzal <naeem.m.afzal@intel.com>
- * Maintainer: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright (C) 2002 Intel Corp.
- * Copyright (C) 2003-2004 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <linux/gpio.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/bitops.h>
-#include <linux/pci.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <asm/pgtable.h>
-#include <asm/page.h>
-#include <mach/hardware.h>
-#include <asm/mach-types.h>
-
-#include <asm/mach/pci.h>
-#include <asm/mach/map.h>
-#include <asm/mach/irq.h>
-#include <asm/mach/time.h>
-#include <asm/mach/flash.h>
-#include <asm/mach/arch.h>
-
-#include <mach/gpio-ixp2000.h>
-
-/*************************************************************************
- * IXDP2x00 IRQ Initialization
- *************************************************************************/
-static volatile unsigned long *board_irq_mask;
-static volatile unsigned long *board_irq_stat;
-static unsigned long board_irq_count;
-
-#ifdef CONFIG_ARCH_IXDP2400
-/*
- * Slowport configuration for accessing CPLD registers on IXDP2x00
- */
-static struct slowport_cfg slowport_cpld_cfg = {
- .CCR = SLOWPORT_CCR_DIV_2,
- .WTC = 0x00000070,
- .RTC = 0x00000070,
- .PCR = SLOWPORT_MODE_FLASH,
- .ADC = SLOWPORT_ADDR_WIDTH_24 | SLOWPORT_DATA_WIDTH_8
-};
-#endif
-
-static void ixdp2x00_irq_mask(struct irq_data *d)
-{
- unsigned long dummy;
- static struct slowport_cfg old_cfg;
-
- /*
- * This is ugly in common code but really don't know
- * of a better way to handle it. :(
- */
-#ifdef CONFIG_ARCH_IXDP2400
- if (machine_is_ixdp2400())
- ixp2000_acquire_slowport(&slowport_cpld_cfg, &old_cfg);
-#endif
-
- dummy = *board_irq_mask;
- dummy |= IXP2000_BOARD_IRQ_MASK(d->irq);
- ixp2000_reg_wrb(board_irq_mask, dummy);
-
-#ifdef CONFIG_ARCH_IXDP2400
- if (machine_is_ixdp2400())
- ixp2000_release_slowport(&old_cfg);
-#endif
-}
-
-static void ixdp2x00_irq_unmask(struct irq_data *d)
-{
- unsigned long dummy;
- static struct slowport_cfg old_cfg;
-
-#ifdef CONFIG_ARCH_IXDP2400
- if (machine_is_ixdp2400())
- ixp2000_acquire_slowport(&slowport_cpld_cfg, &old_cfg);
-#endif
-
- dummy = *board_irq_mask;
- dummy &= ~IXP2000_BOARD_IRQ_MASK(d->irq);
- ixp2000_reg_wrb(board_irq_mask, dummy);
-
- if (machine_is_ixdp2400())
- ixp2000_release_slowport(&old_cfg);
-}
-
-static void ixdp2x00_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
- volatile u32 ex_interrupt = 0;
- static struct slowport_cfg old_cfg;
- int i;
-
- desc->irq_data.chip->irq_mask(&desc->irq_data);
-
-#ifdef CONFIG_ARCH_IXDP2400
- if (machine_is_ixdp2400())
- ixp2000_acquire_slowport(&slowport_cpld_cfg, &old_cfg);
-#endif
- ex_interrupt = *board_irq_stat & 0xff;
- if (machine_is_ixdp2400())
- ixp2000_release_slowport(&old_cfg);
-
- if(!ex_interrupt) {
- printk(KERN_ERR "Spurious IXDP2x00 CPLD interrupt!\n");
- return;
- }
-
- for(i = 0; i < board_irq_count; i++) {
- if(ex_interrupt & (1 << i)) {
- int cpld_irq = IXP2000_BOARD_IRQ(0) + i;
- generic_handle_irq(cpld_irq);
- }
- }
-
- desc->irq_data.chip->irq_unmask(&desc->irq_data);
-}
-
-static struct irq_chip ixdp2x00_cpld_irq_chip = {
- .irq_ack = ixdp2x00_irq_mask,
- .irq_mask = ixdp2x00_irq_mask,
- .irq_unmask = ixdp2x00_irq_unmask
-};
-
-void __init ixdp2x00_init_irq(volatile unsigned long *stat_reg, volatile unsigned long *mask_reg, unsigned long nr_of_irqs)
-{
- unsigned int irq;
-
- ixp2000_init_irq();
-
- if (!ixdp2x00_master_npu())
- return;
-
- board_irq_stat = stat_reg;
- board_irq_mask = mask_reg;
- board_irq_count = nr_of_irqs;
-
- *board_irq_mask = 0xffffffff;
-
- for(irq = IXP2000_BOARD_IRQ(0); irq < IXP2000_BOARD_IRQ(board_irq_count); irq++) {
- irq_set_chip_and_handler(irq, &ixdp2x00_cpld_irq_chip,
- handle_level_irq);
- set_irq_flags(irq, IRQF_VALID);
- }
-
- /* Hook into PCI interrupt */
- irq_set_chained_handler(IRQ_IXP2000_PCIB, ixdp2x00_irq_handler);
-}
-
-/*************************************************************************
- * IXDP2x00 memory map
- *************************************************************************/
-static struct map_desc ixdp2x00_io_desc __initdata = {
- .virtual = IXDP2X00_VIRT_CPLD_BASE,
- .pfn = __phys_to_pfn(IXDP2X00_PHYS_CPLD_BASE),
- .length = IXDP2X00_CPLD_SIZE,
- .type = MT_DEVICE
-};
-
-void __init ixdp2x00_map_io(void)
-{
- ixp2000_map_io();
-
- iotable_init(&ixdp2x00_io_desc, 1);
-}
-
-/*************************************************************************
- * IXDP2x00-common PCI init
- *
- * The IXDP2[48]00 has a horrid PCI bus layout. Basically the board
- * contains two NPUs (ingress and egress) connected over PCI, both running
- * instances of the kernel. So far so good. Peers on the PCI bus running
- * Linux is a common design in telecom systems. The problem is that instead
- * of all the devices being controlled by a single host, different
- * devices are controlled by different NPUs on the same bus, leading to
- * multiple hosts on the bus. The exact bus layout looks like:
- *
- * Bus 0
- * Master NPU <-------------------+-------------------> Slave NPU
- * |
- * |
- * P2P
- * |
- *
- * Bus 1 |
- * <--+------+---------+---------+------+-->
- * | | | | |
- * | | | | |
- * ... Dev PMC Media Eth0 Eth1 ...
- *
- * The master controls all but Eth1, which is controlled by the
- * slave. What this means is that the both the master and the slave
- * have to scan the bus, but only one of them can enumerate the bus.
- * In addition, after the bus is scanned, each kernel must remove
- * the device(s) it does not control from the PCI dev list otherwise
- * a driver on each NPU will try to manage it and we will have horrible
- * conflicts. Oh..and the slave NPU needs to see the master NPU
- * for Intel's drivers to work properly. Closed source drivers...
- *
- * The way we deal with this is fairly simple but ugly:
- *
- * 1) Let master scan and enumerate the bus completely.
- * 2) Master deletes Eth1 from device list.
- * 3) Slave scans bus and then deletes all but Eth1 (Eth0 on slave)
- * from device list.
- * 4) Find HW designers and LART them.
- *
- * The boards also do not do normal PCI IRQ routing, or any sort of
- * sensical swizzling, so we just need to check where on the bus a
- * device sits and figure out to which CPLD pin the interrupt is routed.
- * See ixdp2[48]00.c files.
- *
- *************************************************************************/
-void ixdp2x00_slave_pci_postinit(void)
-{
- struct pci_dev *dev;
-
- /*
- * Remove PMC device is there is one
- */
- if((dev = pci_get_bus_and_slot(1, IXDP2X00_PMC_DEVFN))) {
- pci_stop_and_remove_bus_device(dev);
- pci_dev_put(dev);
- }
-
- dev = pci_get_bus_and_slot(0, IXDP2X00_21555_DEVFN);
- pci_stop_and_remove_bus_device(dev);
- pci_dev_put(dev);
-}
-
-/**************************************************************************
- * IXDP2x00 Machine Setup
- *************************************************************************/
-static struct flash_platform_data ixdp2x00_platform_data = {
- .map_name = "cfi_probe",
- .width = 1,
-};
-
-static struct ixp2000_flash_data ixdp2x00_flash_data = {
- .platform_data = &ixdp2x00_platform_data,
- .nr_banks = 1
-};
-
-static struct resource ixdp2x00_flash_resource = {
- .start = 0xc4000000,
- .end = 0xc4000000 + 0x00ffffff,
- .flags = IORESOURCE_MEM,
-};
-
-static struct platform_device ixdp2x00_flash = {
- .name = "IXP2000-Flash",
- .id = 0,
- .dev = {
- .platform_data = &ixdp2x00_flash_data,
- },
- .num_resources = 1,
- .resource = &ixdp2x00_flash_resource,
-};
-
-static struct ixp2000_i2c_pins ixdp2x00_i2c_gpio_pins = {
- .sda_pin = IXDP2X00_GPIO_SDA,
- .scl_pin = IXDP2X00_GPIO_SCL,
-};
-
-static struct platform_device ixdp2x00_i2c_controller = {
- .name = "IXP2000-I2C",
- .id = 0,
- .dev = {
- .platform_data = &ixdp2x00_i2c_gpio_pins,
- },
- .num_resources = 0
-};
-
-static struct platform_device *ixdp2x00_devices[] __initdata = {
- &ixdp2x00_flash,
- &ixdp2x00_i2c_controller
-};
-
-void __init ixdp2x00_init_machine(void)
-{
- gpio_line_set(IXDP2X00_GPIO_I2C_ENABLE, 1);
- gpio_line_config(IXDP2X00_GPIO_I2C_ENABLE, GPIO_OUT);
-
- platform_add_devices(ixdp2x00_devices, ARRAY_SIZE(ixdp2x00_devices));
- ixp2000_uart_init();
-}
-