|
@@ -1,220 +0,0 @@
|
|
|
-/*
|
|
|
- * arch/arm/mach-iop32x/pci.c
|
|
|
- *
|
|
|
- * PCI support for the Intel IOP321 chipset
|
|
|
- *
|
|
|
- * Author: Rory Bolt <rorybolt@pacbell.net>
|
|
|
- * Copyright (C) 2002 Rory Bolt
|
|
|
- *
|
|
|
- * This program is free software; you can redistribute it and/or modify
|
|
|
- * it under the terms of the GNU General Public License version 2 as
|
|
|
- * published by the Free Software Foundation.
|
|
|
- *
|
|
|
- */
|
|
|
-#include <linux/kernel.h>
|
|
|
-#include <linux/pci.h>
|
|
|
-#include <linux/slab.h>
|
|
|
-#include <linux/mm.h>
|
|
|
-#include <linux/init.h>
|
|
|
-#include <linux/ioport.h>
|
|
|
-
|
|
|
-#include <asm/io.h>
|
|
|
-#include <asm/irq.h>
|
|
|
-#include <asm/system.h>
|
|
|
-#include <asm/hardware.h>
|
|
|
-#include <asm/mach/pci.h>
|
|
|
-
|
|
|
-#include <asm/arch/iop321.h>
|
|
|
-
|
|
|
-// #define DEBUG
|
|
|
-
|
|
|
-#ifdef DEBUG
|
|
|
-#define DBG(x...) printk(x)
|
|
|
-#else
|
|
|
-#define DBG(x...) do { } while (0)
|
|
|
-#endif
|
|
|
-
|
|
|
-/*
|
|
|
- * This routine builds either a type0 or type1 configuration command. If the
|
|
|
- * bus is on the 80321 then a type0 made, else a type1 is created.
|
|
|
- */
|
|
|
-static u32 iop321_cfg_address(struct pci_bus *bus, int devfn, int where)
|
|
|
-{
|
|
|
- struct pci_sys_data *sys = bus->sysdata;
|
|
|
- u32 addr;
|
|
|
-
|
|
|
- if (sys->busnr == bus->number)
|
|
|
- addr = 1 << (PCI_SLOT(devfn) + 16) | (PCI_SLOT(devfn) << 11);
|
|
|
- else
|
|
|
- addr = bus->number << 16 | PCI_SLOT(devfn) << 11 | 1;
|
|
|
-
|
|
|
- addr |= PCI_FUNC(devfn) << 8 | (where & ~3);
|
|
|
-
|
|
|
- return addr;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * This routine checks the status of the last configuration cycle. If an error
|
|
|
- * was detected it returns a 1, else it returns a 0. The errors being checked
|
|
|
- * are parity, master abort, target abort (master and target). These types of
|
|
|
- * errors occure during a config cycle where there is no device, like during
|
|
|
- * the discovery stage.
|
|
|
- */
|
|
|
-static int iop321_pci_status(void)
|
|
|
-{
|
|
|
- unsigned int status;
|
|
|
- int ret = 0;
|
|
|
-
|
|
|
- /*
|
|
|
- * Check the status registers.
|
|
|
- */
|
|
|
- status = *IOP321_ATUSR;
|
|
|
- if (status & 0xf900)
|
|
|
- {
|
|
|
- DBG("\t\t\tPCI: P0 - status = 0x%08x\n", status);
|
|
|
- *IOP321_ATUSR = status & 0xf900;
|
|
|
- ret = 1;
|
|
|
- }
|
|
|
- status = *IOP321_ATUISR;
|
|
|
- if (status & 0x679f)
|
|
|
- {
|
|
|
- DBG("\t\t\tPCI: P1 - status = 0x%08x\n", status);
|
|
|
- *IOP321_ATUISR = status & 0x679f;
|
|
|
- ret = 1;
|
|
|
- }
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Simply write the address register and read the configuration
|
|
|
- * data. Note that the 4 nop's ensure that we are able to handle
|
|
|
- * a delayed abort (in theory.)
|
|
|
- */
|
|
|
-static inline u32 iop321_read(unsigned long addr)
|
|
|
-{
|
|
|
- u32 val;
|
|
|
-
|
|
|
- __asm__ __volatile__(
|
|
|
- "str %1, [%2]\n\t"
|
|
|
- "ldr %0, [%3]\n\t"
|
|
|
- "nop\n\t"
|
|
|
- "nop\n\t"
|
|
|
- "nop\n\t"
|
|
|
- "nop\n\t"
|
|
|
- : "=r" (val)
|
|
|
- : "r" (addr), "r" (IOP321_OCCAR), "r" (IOP321_OCCDR));
|
|
|
-
|
|
|
- return val;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * The read routines must check the error status of the last configuration
|
|
|
- * cycle. If there was an error, the routine returns all hex f's.
|
|
|
- */
|
|
|
-static int
|
|
|
-iop321_read_config(struct pci_bus *bus, unsigned int devfn, int where,
|
|
|
- int size, u32 *value)
|
|
|
-{
|
|
|
- unsigned long addr = iop321_cfg_address(bus, devfn, where);
|
|
|
- u32 val = iop321_read(addr) >> ((where & 3) * 8);
|
|
|
-
|
|
|
- if( iop321_pci_status() )
|
|
|
- val = 0xffffffff;
|
|
|
-
|
|
|
- *value = val;
|
|
|
-
|
|
|
- return PCIBIOS_SUCCESSFUL;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-iop321_write_config(struct pci_bus *bus, unsigned int devfn, int where,
|
|
|
- int size, u32 value)
|
|
|
-{
|
|
|
- unsigned long addr = iop321_cfg_address(bus, devfn, where);
|
|
|
- u32 val;
|
|
|
-
|
|
|
- if (size != 4) {
|
|
|
- val = iop321_read(addr);
|
|
|
- if (!iop321_pci_status() == 0)
|
|
|
- return PCIBIOS_SUCCESSFUL;
|
|
|
-
|
|
|
- where = (where & 3) * 8;
|
|
|
-
|
|
|
- if (size == 1)
|
|
|
- val &= ~(0xff << where);
|
|
|
- else
|
|
|
- val &= ~(0xffff << where);
|
|
|
-
|
|
|
- *IOP321_OCCDR = val | value << where;
|
|
|
- } else {
|
|
|
- asm volatile(
|
|
|
- "str %1, [%2]\n\t"
|
|
|
- "str %0, [%3]\n\t"
|
|
|
- "nop\n\t"
|
|
|
- "nop\n\t"
|
|
|
- "nop\n\t"
|
|
|
- "nop\n\t"
|
|
|
- :
|
|
|
- : "r" (value), "r" (addr),
|
|
|
- "r" (IOP321_OCCAR), "r" (IOP321_OCCDR));
|
|
|
- }
|
|
|
-
|
|
|
- return PCIBIOS_SUCCESSFUL;
|
|
|
-}
|
|
|
-
|
|
|
-static struct pci_ops iop321_ops = {
|
|
|
- .read = iop321_read_config,
|
|
|
- .write = iop321_write_config,
|
|
|
-};
|
|
|
-
|
|
|
-/*
|
|
|
- * When a PCI device does not exist during config cycles, the 80200 gets a
|
|
|
- * bus error instead of returning 0xffffffff. This handler simply returns.
|
|
|
- */
|
|
|
-int
|
|
|
-iop321_pci_abort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
|
|
|
-{
|
|
|
- DBG("PCI abort: address = 0x%08lx fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx\n",
|
|
|
- addr, fsr, regs->ARM_pc, regs->ARM_lr);
|
|
|
-
|
|
|
- /*
|
|
|
- * 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;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Scan an IOP321 PCI bus. sys->bus defines which bus we scan.
|
|
|
- */
|
|
|
-struct pci_bus *iop321_scan_bus(int nr, struct pci_sys_data *sys)
|
|
|
-{
|
|
|
- return pci_scan_bus(sys->busnr, &iop321_ops, sys);
|
|
|
-}
|
|
|
-
|
|
|
-void iop321_init(void)
|
|
|
-{
|
|
|
- DBG("PCI: Intel 80321 PCI init code.\n");
|
|
|
- DBG("ATU: IOP321_ATUCMD=0x%04x\n", *IOP321_ATUCMD);
|
|
|
- DBG("ATU: IOP321_OMWTVR0=0x%04x, IOP321_OIOWTVR=0x%04x\n",
|
|
|
- *IOP321_OMWTVR0,
|
|
|
- *IOP321_OIOWTVR);
|
|
|
- DBG("ATU: IOP321_ATUCR=0x%08x\n", *IOP321_ATUCR);
|
|
|
- DBG("ATU: IOP321_IABAR0=0x%08x IOP321_IALR0=0x%08x IOP321_IATVR0=%08x\n",
|
|
|
- *IOP321_IABAR0, *IOP321_IALR0, *IOP321_IATVR0);
|
|
|
- DBG("ATU: IOP321_OMWTVR0=0x%08x\n", *IOP321_OMWTVR0);
|
|
|
- DBG("ATU: IOP321_IABAR1=0x%08x IOP321_IALR1=0x%08x\n",
|
|
|
- *IOP321_IABAR1, *IOP321_IALR1);
|
|
|
- DBG("ATU: IOP321_ERBAR=0x%08x IOP321_ERLR=0x%08x IOP321_ERTVR=%08x\n",
|
|
|
- *IOP321_ERBAR, *IOP321_ERLR, *IOP321_ERTVR);
|
|
|
- DBG("ATU: IOP321_IABAR2=0x%08x IOP321_IALR2=0x%08x IOP321_IATVR2=%08x\n",
|
|
|
- *IOP321_IABAR2, *IOP321_IALR2, *IOP321_IATVR2);
|
|
|
- DBG("ATU: IOP321_IABAR3=0x%08x IOP321_IALR3=0x%08x IOP321_IATVR3=%08x\n",
|
|
|
- *IOP321_IABAR3, *IOP321_IALR3, *IOP321_IATVR3);
|
|
|
-
|
|
|
- hook_fault_code(16+6, iop321_pci_abort, SIGBUS, "imprecise external abort");
|
|
|
-}
|
|
|
-
|