diff options
Diffstat (limited to 'arch/arm/mach-ixp23xx/pci.c')
| -rw-r--r-- | arch/arm/mach-ixp23xx/pci.c | 294 |
1 files changed, 0 insertions, 294 deletions
diff --git a/arch/arm/mach-ixp23xx/pci.c b/arch/arm/mach-ixp23xx/pci.c deleted file mode 100644 index 911f5a58e006..000000000000 --- a/arch/arm/mach-ixp23xx/pci.c +++ /dev/null @@ -1,294 +0,0 @@ -/* - * arch/arm/mach-ixp23xx/pci.c - * - * PCI routines for IXP23XX based systems - * - * Copyright (c) 2005 MontaVista Software, Inc. - * - * based on original code: - * - * Author: Naeem Afzal <naeem.m.afzal@intel.com> - * Copyright 2002-2005 Intel Corp. - * - * 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/sched.h> -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/interrupt.h> -#include <linux/mm.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/delay.h> -#include <linux/io.h> - -#include <asm/irq.h> -#include <asm/sizes.h> -#include <asm/mach/pci.h> -#include <mach/hardware.h> - -extern int (*external_fault) (unsigned long, struct pt_regs *); - -static volatile int pci_master_aborts = 0; - -#ifdef DEBUG -#define DBG(x...) printk(x) -#else -#define DBG(x...) -#endif - -int clear_master_aborts(void); - -static u32 -*ixp23xx_pci_config_addr(unsigned int bus_nr, unsigned int devfn, int where) -{ - u32 *paddress; - - /* - * Must be dword aligned - */ - where &= ~3; - - /* - * For top bus, generate type 0, else type 1 - */ - if (!bus_nr) { - if (PCI_SLOT(devfn) >= 8) - return 0; - - paddress = (u32 *) (IXP23XX_PCI_CFG0_VIRT - | (1 << (PCI_SLOT(devfn) + 16)) - | (PCI_FUNC(devfn) << 8) | where); - } else { - paddress = (u32 *) (IXP23XX_PCI_CFG1_VIRT - | (bus_nr << 16) - | (PCI_SLOT(devfn) << 11) - | (PCI_FUNC(devfn) << 8) | where); - } - - return paddress; -} - -/* - * Mask table, bits to mask for quantity of size 1, 2 or 4 bytes. - * 0 and 3 are not valid indexes... - */ -static u32 bytemask[] = { - /*0*/ 0, - /*1*/ 0xff, - /*2*/ 0xffff, - /*3*/ 0, - /*4*/ 0xffffffff, -}; - -static int ixp23xx_pci_read_config(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 *value) -{ - u32 n; - u32 *addr; - - n = where % 4; - - DBG("In config_read(%d) %d from dev %d:%d:%d\n", size, where, - bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); - - addr = ixp23xx_pci_config_addr(bus->number, devfn, where); - if (!addr) - return PCIBIOS_DEVICE_NOT_FOUND; - - pci_master_aborts = 0; - *value = (*addr >> (8*n)) & bytemask[size]; - if (pci_master_aborts) { - pci_master_aborts = 0; - *value = 0xffffffff; - return PCIBIOS_DEVICE_NOT_FOUND; - } - - return PCIBIOS_SUCCESSFUL; -} - -/* - * We don't do error checking on the address for writes. - * It's assumed that the user checked for the device existing first - * by doing a read first. - */ -static int ixp23xx_pci_write_config(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 value) -{ - u32 mask; - u32 *addr; - u32 temp; - - mask = ~(bytemask[size] << ((where % 0x4) * 8)); - addr = ixp23xx_pci_config_addr(bus->number, devfn, where); - if (!addr) - return PCIBIOS_DEVICE_NOT_FOUND; - temp = (u32) (value) << ((where % 0x4) * 8); - *addr = (*addr & mask) | temp; - - clear_master_aborts(); - - return PCIBIOS_SUCCESSFUL; -} - -struct pci_ops ixp23xx_pci_ops = { - .read = ixp23xx_pci_read_config, - .write = ixp23xx_pci_write_config, -}; - -struct pci_bus *ixp23xx_pci_scan_bus(int nr, struct pci_sys_data *sysdata) -{ - return pci_scan_root_bus(NULL, sysdata->busnr, &ixp23xx_pci_ops, - sysdata, &sysdata->resources); -} - -int ixp23xx_pci_abort_handler(unsigned long addr, unsigned int fsr, struct pt_regs *regs) -{ - volatile unsigned long temp; - unsigned long flags; - - pci_master_aborts = 1; - - local_irq_save(flags); - temp = *IXP23XX_PCI_CONTROL; - - /* - * master abort and cmd tgt err - */ - if (temp & ((1 << 8) | (1 << 5))) - *IXP23XX_PCI_CONTROL = temp; - - temp = *IXP23XX_PCI_CMDSTAT; - - if (temp & (1 << 29)) - *IXP23XX_PCI_CMDSTAT = temp; - local_irq_restore(flags); - - /* - * If it was an imprecise abort, then we need to correct the - * return address to be _after_ the instruction. - */ - if (fsr & (1 << 10)) - regs->ARM_pc += 4; - - return 0; -} - -int clear_master_aborts(void) -{ - volatile u32 temp; - - temp = *IXP23XX_PCI_CONTROL; - - /* - * master abort and cmd tgt err - */ - if (temp & ((1 << 8) | (1 << 5))) - *IXP23XX_PCI_CONTROL = temp; - - temp = *IXP23XX_PCI_CMDSTAT; - - if (temp & (1 << 29)) - *IXP23XX_PCI_CMDSTAT = temp; - - return 0; -} - -static void __init ixp23xx_pci_common_init(void) -{ -#ifdef __ARMEB__ - *IXP23XX_PCI_CONTROL |= 0x20000; /* set I/O swapping */ -#endif - /* - * ADDR_31 needs to be clear for PCI memory access to CPP memory - */ - *IXP23XX_CPP2XSI_CURR_XFER_REG3 &= ~IXP23XX_CPP2XSI_ADDR_31; - *IXP23XX_CPP2XSI_CURR_XFER_REG3 |= IXP23XX_CPP2XSI_PSH_OFF; - - /* - * Select correct memory for PCI inbound transactions - */ - if (ixp23xx_cpp_boot()) { - *IXP23XX_PCI_CPP_ADDR_BITS &= ~(1 << 1); - } else { - *IXP23XX_PCI_CPP_ADDR_BITS |= (1 << 1); - - /* - * Enable coherency on A2 silicon. - */ - if (arch_is_coherent()) - *IXP23XX_CPP2XSI_CURR_XFER_REG3 &= ~IXP23XX_CPP2XSI_COH_OFF; - } -} - -void __init ixp23xx_pci_preinit(void) -{ - pcibios_min_io = 0; - pcibios_min_mem = 0xe0000000; - - pci_set_flags(0); - - ixp23xx_pci_common_init(); - - hook_fault_code(16+6, ixp23xx_pci_abort_handler, SIGBUS, 0, - "PCI config cycle to non-existent device"); - - *IXP23XX_PCI_ADDR_EXT = 0x0000e000; -} - -/* - * Prevent PCI layer from seeing the inbound host-bridge resources - */ -static void __devinit pci_fixup_ixp23xx(struct pci_dev *dev) -{ - int i; - - dev->class &= 0xff; - dev->class |= PCI_CLASS_BRIDGE_HOST << 8; - for (i = 0; i < PCI_NUM_RESOURCES; i++) { - dev->resource[i].start = 0; - dev->resource[i].end = 0; - dev->resource[i].flags = 0; - } -} -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9002, pci_fixup_ixp23xx); - -/* - * IXP2300 systems often have large resource requirements, so we just - * use our own resource space. - */ -static struct resource ixp23xx_pci_mem_space = { - .start = IXP23XX_PCI_MEM_START, - .end = IXP23XX_PCI_MEM_START + IXP23XX_PCI_MEM_SIZE - 1, - .flags = IORESOURCE_MEM, - .name = "PCI Mem Space" -}; - -static struct resource ixp23xx_pci_io_space = { - .start = 0x00000100, - .end = 0x01ffffff, - .flags = IORESOURCE_IO, - .name = "PCI I/O Space" -}; - -int ixp23xx_pci_setup(int nr, struct pci_sys_data *sys) -{ - if (nr >= 1) - return 0; - - pci_add_resource_offset(&sys->resources, - &ixp23xx_pci_io_space, sys->io_offset); - pci_add_resource_offset(&sys->resources, - &ixp23xx_pci_mem_space, sys->mem_offset); - - return 1; -} - -void __init ixp23xx_pci_slave_init(void) -{ - ixp23xx_pci_common_init(); -} |