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linux-stable/arch/arm/mach-ks8695/pci.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  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 program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details 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
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/arm/mach-ks8695/pci.c
*
* Copyright (C) 2003, Micrel Semiconductors
* Copyright (C) 2006, Greg Ungerer <gerg@snapgear.com>
* Copyright (C) 2006, Ben Dooks
* Copyright (C) 2007, Andrew Victor
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/signal.h>
#include <asm/mach/pci.h>
#include <mach/hardware.h>
#include "devices.h"
#include "regs-pci.h"
static int pci_dbg;
static void ks8695_pci_setupconfig(unsigned int bus_nr, unsigned int devfn, unsigned int where)
{
unsigned long pbca;
pbca = PBCA_ENABLE | (where & ~3);
pbca |= PCI_SLOT(devfn) << 11 ;
pbca |= PCI_FUNC(devfn) << 8;
pbca |= bus_nr << 16;
if (bus_nr == 0) {
/* use Type-0 transaction */
__raw_writel(pbca, KS8695_PCI_VA + KS8695_PBCA);
} else {
/* use Type-1 transaction */
__raw_writel(pbca | PBCA_TYPE1, KS8695_PCI_VA + KS8695_PBCA);
}
}
static void __iomem *ks8695_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
int where)
{
ks8695_pci_setupconfig(bus->number, devfn, where);
return KS8695_PCI_VA + KS8695_PBCD;
}
static void ks8695_local_writeconfig(int where, u32 value)
{
ks8695_pci_setupconfig(0, 0, where);
__raw_writel(value, KS8695_PCI_VA + KS8695_PBCD);
}
static struct pci_ops ks8695_pci_ops = {
.map_bus = ks8695_pci_map_bus,
.read = pci_generic_config_read32,
.write = pci_generic_config_write32,
};
static struct resource pci_mem = {
.name = "PCI Memory space",
.start = KS8695_PCIMEM_PA,
.end = KS8695_PCIMEM_PA + (KS8695_PCIMEM_SIZE - 1),
.flags = IORESOURCE_MEM,
};
static struct resource pci_io = {
.name = "PCI IO space",
.start = KS8695_PCIIO_PA,
.end = KS8695_PCIIO_PA + (KS8695_PCIIO_SIZE - 1),
.flags = IORESOURCE_IO,
};
static int __init ks8695_pci_setup(int nr, struct pci_sys_data *sys)
{
if (nr > 0)
return 0;
request_resource(&iomem_resource, &pci_mem);
request_resource(&ioport_resource, &pci_io);
pci_add_resource_offset(&sys->resources, &pci_io, sys->io_offset);
pci_add_resource_offset(&sys->resources, &pci_mem, sys->mem_offset);
/* Assign and enable processor bridge */
ks8695_local_writeconfig(PCI_BASE_ADDRESS_0, KS8695_PCIMEM_PA);
/* Enable bus-master & Memory Space access */
ks8695_local_writeconfig(PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
/* Set cache-line size & latency. */
ks8695_local_writeconfig(PCI_CACHE_LINE_SIZE, (32 << 8) | (L1_CACHE_BYTES / sizeof(u32)));
/* Reserve PCI memory space for PCI-AHB resources */
if (!request_mem_region(KS8695_PCIMEM_PA, SZ_64M, "PCI-AHB Bridge")) {
printk(KERN_ERR "Cannot allocate PCI-AHB Bridge memory.\n");
return -EBUSY;
}
return 1;
}
static inline unsigned int size_mask(unsigned long size)
{
return (~size) + 1;
}
static int ks8695_pci_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
{
unsigned long pc = instruction_pointer(regs);
unsigned long instr = *(unsigned long *)pc;
unsigned long cmdstat;
cmdstat = __raw_readl(KS8695_PCI_VA + KS8695_CRCFCS);
printk(KERN_ERR "PCI abort: address = 0x%08lx fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx [%s%s%s%s%s]\n",
addr, fsr, regs->ARM_pc, regs->ARM_lr,
cmdstat & (PCI_STATUS_SIG_TARGET_ABORT << 16) ? "GenTarget" : " ",
cmdstat & (PCI_STATUS_REC_TARGET_ABORT << 16) ? "RecvTarget" : " ",
cmdstat & (PCI_STATUS_REC_MASTER_ABORT << 16) ? "MasterAbort" : " ",
cmdstat & (PCI_STATUS_SIG_SYSTEM_ERROR << 16) ? "SysError" : " ",
cmdstat & (PCI_STATUS_DETECTED_PARITY << 16) ? "Parity" : " "
);
__raw_writel(cmdstat, KS8695_PCI_VA + KS8695_CRCFCS);
/*
* If the instruction being executed was a read,
* make it look like it read all-ones.
*/
if ((instr & 0x0c100000) == 0x04100000) {
int reg = (instr >> 12) & 15;
unsigned long val;
if (instr & 0x00400000)
val = 255;
else
val = -1;
regs->uregs[reg] = val;
regs->ARM_pc += 4;
return 0;
}
if ((instr & 0x0e100090) == 0x00100090) {
int reg = (instr >> 12) & 15;
regs->uregs[reg] = -1;
regs->ARM_pc += 4;
return 0;
}
return 1;
}
static void __init ks8695_pci_preinit(void)
{
/* make software reset to avoid freeze if PCI bus was messed up */
__raw_writel(0x80000000, KS8695_PCI_VA + KS8695_PBCS);
/* stage 1 initialization, subid, subdevice = 0x0001 */
__raw_writel(0x00010001, KS8695_PCI_VA + KS8695_CRCSID);
/* stage 2 initialization */
/* prefetch limits with 16 words, retry enable */
__raw_writel(0x40000000, KS8695_PCI_VA + KS8695_PBCS);
/* configure memory mapping */
__raw_writel(KS8695_PCIMEM_PA, KS8695_PCI_VA + KS8695_PMBA);
__raw_writel(size_mask(KS8695_PCIMEM_SIZE), KS8695_PCI_VA + KS8695_PMBAM);
__raw_writel(KS8695_PCIMEM_PA, KS8695_PCI_VA + KS8695_PMBAT);
__raw_writel(0, KS8695_PCI_VA + KS8695_PMBAC);
/* configure IO mapping */
__raw_writel(KS8695_PCIIO_PA, KS8695_PCI_VA + KS8695_PIOBA);
__raw_writel(size_mask(KS8695_PCIIO_SIZE), KS8695_PCI_VA + KS8695_PIOBAM);
__raw_writel(KS8695_PCIIO_PA, KS8695_PCI_VA + KS8695_PIOBAT);
__raw_writel(0, KS8695_PCI_VA + KS8695_PIOBAC);
/* hook in fault handlers */
hook_fault_code(8, ks8695_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
hook_fault_code(10, ks8695_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
}
static void ks8695_show_pciregs(void)
{
if (!pci_dbg)
return;
printk(KERN_INFO "PCI: CRCFID = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFID));
printk(KERN_INFO "PCI: CRCFCS = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFCS));
printk(KERN_INFO "PCI: CRCFRV = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFRV));
printk(KERN_INFO "PCI: CRCFLT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFLT));
printk(KERN_INFO "PCI: CRCBMA = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCBMA));
printk(KERN_INFO "PCI: CRCSID = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCSID));
printk(KERN_INFO "PCI: CRCFIT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_CRCFIT));
printk(KERN_INFO "PCI: PBM = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PBM));
printk(KERN_INFO "PCI: PBCS = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PBCS));
printk(KERN_INFO "PCI: PMBA = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBA));
printk(KERN_INFO "PCI: PMBAC = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBAC));
printk(KERN_INFO "PCI: PMBAM = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBAM));
printk(KERN_INFO "PCI: PMBAT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PMBAT));
printk(KERN_INFO "PCI: PIOBA = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBA));
printk(KERN_INFO "PCI: PIOBAC = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBAC));
printk(KERN_INFO "PCI: PIOBAM = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBAM));
printk(KERN_INFO "PCI: PIOBAT = %08x\n", __raw_readl(KS8695_PCI_VA + KS8695_PIOBAT));
}
static struct hw_pci ks8695_pci __initdata = {
.nr_controllers = 1,
.ops = &ks8695_pci_ops,
.preinit = ks8695_pci_preinit,
.setup = ks8695_pci_setup,
.postinit = NULL,
.map_irq = NULL,
};
void __init ks8695_init_pci(struct ks8695_pci_cfg *cfg)
{
if (__raw_readl(KS8695_PCI_VA + KS8695_CRCFRV) & CFRV_GUEST) {
printk("PCI: KS8695 in guest mode, not initialising\n");
return;
}
pcibios_min_io = 0;
pcibios_min_mem = 0;
printk(KERN_INFO "PCI: Initialising\n");
ks8695_show_pciregs();
/* set Mode */
__raw_writel(cfg->mode << 29, KS8695_PCI_VA + KS8695_PBM);
ks8695_pci.map_irq = cfg->map_irq; /* board-specific map_irq method */
pci_common_init(&ks8695_pci);
}
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