forked from luck/tmp_suning_uos_patched
d2912cb15b
Based on 2 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 version 2 as published by the free software foundation 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
*
|
|
* Copyright (C) 2010 John Crispin <john@phrozen.org>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/mm.h>
|
|
#include <asm/addrspace.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
#include <lantiq_soc.h>
|
|
|
|
#include "pci-lantiq.h"
|
|
|
|
#define LTQ_PCI_CFG_BUSNUM_SHF 16
|
|
#define LTQ_PCI_CFG_DEVNUM_SHF 11
|
|
#define LTQ_PCI_CFG_FUNNUM_SHF 8
|
|
|
|
#define PCI_ACCESS_READ 0
|
|
#define PCI_ACCESS_WRITE 1
|
|
|
|
static int ltq_pci_config_access(unsigned char access_type, struct pci_bus *bus,
|
|
unsigned int devfn, unsigned int where, u32 *data)
|
|
{
|
|
unsigned long cfg_base;
|
|
unsigned long flags;
|
|
u32 temp;
|
|
|
|
/* we support slot from 0 to 15 dev_fn & 0x68 (AD29) is the
|
|
SoC itself */
|
|
if ((bus->number != 0) || ((devfn & 0xf8) > 0x78)
|
|
|| ((devfn & 0xf8) == 0) || ((devfn & 0xf8) == 0x68))
|
|
return 1;
|
|
|
|
spin_lock_irqsave(&ebu_lock, flags);
|
|
|
|
cfg_base = (unsigned long) ltq_pci_mapped_cfg;
|
|
cfg_base |= (bus->number << LTQ_PCI_CFG_BUSNUM_SHF) | (devfn <<
|
|
LTQ_PCI_CFG_FUNNUM_SHF) | (where & ~0x3);
|
|
|
|
/* Perform access */
|
|
if (access_type == PCI_ACCESS_WRITE) {
|
|
ltq_w32(swab32(*data), ((u32 *)cfg_base));
|
|
} else {
|
|
*data = ltq_r32(((u32 *)(cfg_base)));
|
|
*data = swab32(*data);
|
|
}
|
|
wmb();
|
|
|
|
/* clean possible Master abort */
|
|
cfg_base = (unsigned long) ltq_pci_mapped_cfg;
|
|
cfg_base |= (0x0 << LTQ_PCI_CFG_FUNNUM_SHF) + 4;
|
|
temp = ltq_r32(((u32 *)(cfg_base)));
|
|
temp = swab32(temp);
|
|
cfg_base = (unsigned long) ltq_pci_mapped_cfg;
|
|
cfg_base |= (0x68 << LTQ_PCI_CFG_FUNNUM_SHF) + 4;
|
|
ltq_w32(temp, ((u32 *)cfg_base));
|
|
|
|
spin_unlock_irqrestore(&ebu_lock, flags);
|
|
|
|
if (((*data) == 0xffffffff) && (access_type == PCI_ACCESS_READ))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ltq_pci_read_config_dword(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 *val)
|
|
{
|
|
u32 data = 0;
|
|
|
|
if (ltq_pci_config_access(PCI_ACCESS_READ, bus, devfn, where, &data))
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
if (size == 1)
|
|
*val = (data >> ((where & 3) << 3)) & 0xff;
|
|
else if (size == 2)
|
|
*val = (data >> ((where & 3) << 3)) & 0xffff;
|
|
else
|
|
*val = data;
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
int ltq_pci_write_config_dword(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 val)
|
|
{
|
|
u32 data = 0;
|
|
|
|
if (size == 4) {
|
|
data = val;
|
|
} else {
|
|
if (ltq_pci_config_access(PCI_ACCESS_READ, bus,
|
|
devfn, where, &data))
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
if (size == 1)
|
|
data = (data & ~(0xff << ((where & 3) << 3))) |
|
|
(val << ((where & 3) << 3));
|
|
else if (size == 2)
|
|
data = (data & ~(0xffff << ((where & 3) << 3))) |
|
|
(val << ((where & 3) << 3));
|
|
}
|
|
|
|
if (ltq_pci_config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|