/* * Copyright 2001 MontaVista Software Inc. * Author: MontaVista Software, Inc. * ahennessy@mvista.com * * Copyright (C) 2000-2001 Toshiba Corporation * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) * * Based on arch/mips/ddb5xxx/ddb5477/pci_ops.c * * Define the pci_ops for TX3927. * * Much of the code is derived from the original DDB5074 port by * Geert Uytterhoeven <geert@sonycom.com> * * 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. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/types.h> #include <linux/pci.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/interrupt.h> #include <asm/addrspace.h> #include <asm/txx9irq.h> #include <asm/txx9/pci.h> #include <asm/txx9/tx3927.h> static int mkaddr(struct pci_bus *bus, unsigned char devfn, unsigned char where) { if (bus->parent == NULL && devfn >= PCI_DEVFN(TX3927_PCIC_MAX_DEVNU, 0)) return -1; tx3927_pcicptr->ica = ((bus->number & 0xff) << 0x10) | ((devfn & 0xff) << 0x08) | (where & 0xfc) | (bus->parent ? 1 : 0); /* clear M_ABORT and Disable M_ABORT Int. */ tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; tx3927_pcicptr->pcistatim &= ~PCI_STATUS_REC_MASTER_ABORT; return 0; } static inline int check_abort(void) { if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT) { tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; tx3927_pcicptr->pcistatim |= PCI_STATUS_REC_MASTER_ABORT; /* flush write buffer */ iob(); return PCIBIOS_DEVICE_NOT_FOUND; } return PCIBIOS_SUCCESSFUL; } static int tx3927_pci_read_config(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val) { if (mkaddr(bus, devfn, where)) { *val = 0xffffffff; return PCIBIOS_DEVICE_NOT_FOUND; } switch (size) { case 1: *val = *(volatile u8 *) ((unsigned long) & tx3927_pcicptr->icd | (where & 3)); break; case 2: *val = le16_to_cpu(*(volatile u16 *) ((unsigned long) & tx3927_pcicptr->icd | (where & 3))); break; case 4: *val = le32_to_cpu(tx3927_pcicptr->icd); break; } return check_abort(); } static int tx3927_pci_write_config(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val) { if (mkaddr(bus, devfn, where)) return PCIBIOS_DEVICE_NOT_FOUND; switch (size) { case 1: *(volatile u8 *) ((unsigned long) & tx3927_pcicptr->icd | (where & 3)) = val; break; case 2: *(volatile u16 *) ((unsigned long) & tx3927_pcicptr->icd | (where & 2)) = cpu_to_le16(val); break; case 4: tx3927_pcicptr->icd = cpu_to_le32(val); } return check_abort(); } static struct pci_ops tx3927_pci_ops = { .read = tx3927_pci_read_config, .write = tx3927_pci_write_config, }; void __init tx3927_pcic_setup(struct pci_controller *channel, unsigned long sdram_size, int extarb) { unsigned long flags; unsigned long io_base = channel->io_resource->start + mips_io_port_base - IO_BASE; unsigned long io_size = channel->io_resource->end - channel->io_resource->start; unsigned long io_pciaddr = channel->io_resource->start - channel->io_offset; unsigned long mem_base = channel->mem_resource->start; unsigned long mem_size = channel->mem_resource->end - channel->mem_resource->start; unsigned long mem_pciaddr = channel->mem_resource->start - channel->mem_offset; printk(KERN_INFO "TX3927 PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:%s", tx3927_pcicptr->did, tx3927_pcicptr->vid, tx3927_pcicptr->rid, extarb ? "External" : "Internal"); channel->pci_ops = &tx3927_pci_ops; local_irq_save(flags); /* Disable External PCI Config. Access */ tx3927_pcicptr->lbc = TX3927_PCIC_LBC_EPCAD; #ifdef __BIG_ENDIAN tx3927_pcicptr->lbc |= TX3927_PCIC_LBC_IBSE | TX3927_PCIC_LBC_TIBSE | TX3927_PCIC_LBC_TMFBSE | TX3927_PCIC_LBC_MSDSE; #endif /* LB->PCI mappings */ tx3927_pcicptr->iomas = ~(io_size - 1); tx3927_pcicptr->ilbioma = io_base; tx3927_pcicptr->ipbioma = io_pciaddr; tx3927_pcicptr->mmas = ~(mem_size - 1); tx3927_pcicptr->ilbmma = mem_base; tx3927_pcicptr->ipbmma = mem_pciaddr; /* PCI->LB mappings */ tx3927_pcicptr->iobas = 0xffffffff; tx3927_pcicptr->ioba = 0; tx3927_pcicptr->tlbioma = 0; tx3927_pcicptr->mbas = ~(sdram_size - 1); tx3927_pcicptr->mba = 0; tx3927_pcicptr->tlbmma = 0; /* Enable Direct mapping Address Space Decoder */ tx3927_pcicptr->lbc |= TX3927_PCIC_LBC_ILMDE | TX3927_PCIC_LBC_ILIDE; /* Clear All Local Bus Status */ tx3927_pcicptr->lbstat = TX3927_PCIC_LBIM_ALL; /* Enable All Local Bus Interrupts */ tx3927_pcicptr->lbim = TX3927_PCIC_LBIM_ALL; /* Clear All PCI Status Error */ tx3927_pcicptr->pcistat = TX3927_PCIC_PCISTATIM_ALL; /* Enable All PCI Status Error Interrupts */ tx3927_pcicptr->pcistatim = TX3927_PCIC_PCISTATIM_ALL; /* PCIC Int => IRC IRQ10 */ tx3927_pcicptr->il = TX3927_IR_PCI; /* Target Control (per errata) */ tx3927_pcicptr->tc = TX3927_PCIC_TC_OF8E | TX3927_PCIC_TC_IF8E; /* Enable Bus Arbiter */ if (!extarb) tx3927_pcicptr->pbapmc = TX3927_PCIC_PBAPMC_PBAEN; tx3927_pcicptr->pcicmd = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO | PCI_COMMAND_PARITY | PCI_COMMAND_SERR; local_irq_restore(flags); } static irqreturn_t tx3927_pcierr_interrupt(int irq, void *dev_id) { struct pt_regs *regs = get_irq_regs(); if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) { printk(KERN_WARNING "PCI error interrupt at 0x%08lx.\n", regs->cp0_epc); printk(KERN_WARNING "pcistat:%02x, lbstat:%04lx\n", tx3927_pcicptr->pcistat, tx3927_pcicptr->lbstat); } if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) { /* clear all pci errors */ tx3927_pcicptr->pcistat |= TX3927_PCIC_PCISTATIM_ALL; tx3927_pcicptr->istat = TX3927_PCIC_IIM_ALL; tx3927_pcicptr->tstat = TX3927_PCIC_TIM_ALL; tx3927_pcicptr->lbstat = TX3927_PCIC_LBIM_ALL; return IRQ_HANDLED; } console_verbose(); panic("PCI error."); } void __init tx3927_setup_pcierr_irq(void) { if (request_irq(TXX9_IRQ_BASE + TX3927_IR_PCI, tx3927_pcierr_interrupt, IRQF_DISABLED, "PCI error", (void *)TX3927_PCIC_REG)) printk(KERN_WARNING "Failed to request irq for PCIERR\n"); }