/* * arch/arm/mach-ixp2000/ixdp2800.c * * IXDP2800 platform support * * Original Author: Jeffrey Daly <jeffrey.daly@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/kernel.h> #include <linux/init.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/interrupt.h> #include <linux/device.h> #include <linux/bitops.h> #include <linux/pci.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/delay.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/pgtable.h> #include <asm/page.h> #include <asm/system.h> #include <asm/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> /************************************************************************* * IXDP2800 timer tick *************************************************************************/ static void __init ixdp2800_timer_init(void) { ixp2000_init_time(50000000); } static struct sys_timer ixdp2800_timer = { .init = ixdp2800_timer_init, .offset = ixp2000_gettimeoffset, }; /************************************************************************* * IXDP2800 PCI *************************************************************************/ static void __init ixdp2800_slave_disable_pci_master(void) { *IXP2000_PCI_CMDSTAT &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); } static void __init ixdp2800_master_wait_for_slave(void) { volatile u32 *addr; printk(KERN_INFO "IXDP2800: waiting for slave NPU to configure " "its BAR sizes\n"); addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN, PCI_BASE_ADDRESS_1); do { *addr = 0xffffffff; cpu_relax(); } while (*addr != 0xfe000008); addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN, PCI_BASE_ADDRESS_2); do { *addr = 0xffffffff; cpu_relax(); } while (*addr != 0xc0000008); /* * Configure the slave's SDRAM BAR by hand. */ *addr = 0x40000008; } static void __init ixdp2800_slave_wait_for_master_enable(void) { printk(KERN_INFO "IXDP2800: waiting for master NPU to enable us\n"); while ((*IXP2000_PCI_CMDSTAT & PCI_COMMAND_MASTER) == 0) cpu_relax(); } void __init ixdp2800_pci_preinit(void) { printk("ixdp2x00_pci_preinit called\n"); *IXP2000_PCI_ADDR_EXT = 0x0001e000; if (!ixdp2x00_master_npu()) ixdp2800_slave_disable_pci_master(); *IXP2000_PCI_SRAM_BASE_ADDR_MASK = (0x2000000 - 1) & ~0x3ffff; *IXP2000_PCI_DRAM_BASE_ADDR_MASK = (0x40000000 - 1) & ~0xfffff; ixp2000_pci_preinit(); if (ixdp2x00_master_npu()) { /* * Wait until the slave set its SRAM/SDRAM BAR sizes * correctly before we proceed to scan and enumerate * the bus. */ ixdp2800_master_wait_for_slave(); /* * We configure the SDRAM BARs by hand because they * are 1G and fall outside of the regular allocated * PCI address space. */ *IXP2000_PCI_SDRAM_BAR = 0x00000008; } else { /* * Wait for the master to complete scanning the bus * and assigning resources before we proceed to scan * the bus ourselves. Set pci=firmware to honor the * master's resource assignment. */ ixdp2800_slave_wait_for_master_enable(); pcibios_setup("firmware"); } } /* * We assign the SDRAM BARs for the two IXP2800 CPUs by hand, outside * of the regular PCI window, because there's only 512M of outbound PCI * memory window on each IXP, while we need 1G for each of the BARs. */ static void __devinit ixp2800_pci_fixup(struct pci_dev *dev) { if (machine_is_ixdp2800()) { dev->resource[2].start = 0; dev->resource[2].end = 0; dev->resource[2].flags = 0; } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IXP2800, ixp2800_pci_fixup); static int __init ixdp2800_pci_setup(int nr, struct pci_sys_data *sys) { sys->mem_offset = 0x00000000; ixp2000_pci_setup(nr, sys); return 1; } static int __init ixdp2800_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin) { if (ixdp2x00_master_npu()) { /* * Root bus devices. Slave NPU is only one with interrupt. * Everything else, we just return -1 which is invalid. */ if(!dev->bus->self) { if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN ) return IRQ_IXDP2800_INGRESS_NPU; return -1; } /* * Bridge behind the PMC slot. */ if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN && dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN && !dev->bus->parent->self->bus->parent) return IRQ_IXDP2800_PMC; /* * Device behind the first bridge */ if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) { switch(dev->devfn) { case IXDP2X00_PMC_DEVFN: return IRQ_IXDP2800_PMC; case IXDP2800_MASTER_ENET_DEVFN: return IRQ_IXDP2800_EGRESS_ENET; case IXDP2800_SWITCH_FABRIC_DEVFN: return IRQ_IXDP2800_FABRIC; } } return -1; } else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */ } static void __init ixdp2800_master_enable_slave(void) { volatile u32 *addr; printk(KERN_INFO "IXDP2800: enabling slave NPU\n"); addr = (volatile u32 *)ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN, PCI_COMMAND); *addr |= PCI_COMMAND_MASTER; } static void __init ixdp2800_master_wait_for_slave_bus_scan(void) { volatile u32 *addr; printk(KERN_INFO "IXDP2800: waiting for slave to finish bus scan\n"); addr = (volatile u32 *)ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN, PCI_COMMAND); while ((*addr & PCI_COMMAND_MEMORY) == 0) cpu_relax(); } static void __init ixdp2800_slave_signal_bus_scan_completion(void) { printk(KERN_INFO "IXDP2800: bus scan done, signaling master\n"); *IXP2000_PCI_CMDSTAT |= PCI_COMMAND_MEMORY; } static void __init ixdp2800_pci_postinit(void) { if (!ixdp2x00_master_npu()) { ixdp2x00_slave_pci_postinit(); ixdp2800_slave_signal_bus_scan_completion(); } } struct __initdata hw_pci ixdp2800_pci __initdata = { .nr_controllers = 1, .setup = ixdp2800_pci_setup, .preinit = ixdp2800_pci_preinit, .postinit = ixdp2800_pci_postinit, .scan = ixp2000_pci_scan_bus, .map_irq = ixdp2800_pci_map_irq, }; int __init ixdp2800_pci_init(void) { if (machine_is_ixdp2800()) { struct pci_dev *dev; pci_common_init(&ixdp2800_pci); if (ixdp2x00_master_npu()) { dev = pci_get_bus_and_slot(1, IXDP2800_SLAVE_ENET_DEVFN); pci_remove_bus_device(dev); pci_dev_put(dev); ixdp2800_master_enable_slave(); ixdp2800_master_wait_for_slave_bus_scan(); } else { dev = pci_get_bus_and_slot(1, IXDP2800_MASTER_ENET_DEVFN); pci_remove_bus_device(dev); pci_dev_put(dev); } } return 0; } subsys_initcall(ixdp2800_pci_init); void __init ixdp2800_init_irq(void) { ixdp2x00_init_irq(IXDP2800_CPLD_INT_STAT, IXDP2800_CPLD_INT_MASK, IXDP2800_NR_IRQS); } MACHINE_START(IXDP2800, "Intel IXDP2800 Development Platform") /* Maintainer: MontaVista Software, Inc. */ .phys_io = IXP2000_UART_PHYS_BASE, .io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc, .boot_params = 0x00000100, .map_io = ixdp2x00_map_io, .init_irq = ixdp2800_init_irq, .timer = &ixdp2800_timer, .init_machine = ixdp2x00_init_machine, MACHINE_END