forked from Minki/linux
7034228792
Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
/*
|
|
* Copyright (C) 1999, 2000, 2004 MIPS Technologies, Inc.
|
|
* All rights reserved.
|
|
* Authors: Carsten Langgaard <carstenl@mips.com>
|
|
* Maciej W. Rozycki <macro@mips.com>
|
|
*
|
|
* This program is free software; you can distribute 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 distributed in the hope 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.
|
|
*
|
|
* MIPS boards specific PCI support.
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/mips-boards/bonito64.h>
|
|
|
|
#define PCI_ACCESS_READ 0
|
|
#define PCI_ACCESS_WRITE 1
|
|
|
|
#define CFG_SPACE_REG(offset) (void *)CKSEG1ADDR(_pcictrl_bonito_pcicfg + (offset))
|
|
#define ID_SEL_BEGIN 10
|
|
#define MAX_DEV_NUM (31 - ID_SEL_BEGIN)
|
|
|
|
|
|
static int bonito64_pcibios_config_access(unsigned char access_type,
|
|
struct pci_bus *bus,
|
|
unsigned int devfn, int where,
|
|
u32 * data)
|
|
{
|
|
u32 busnum = bus->number;
|
|
u32 addr, type;
|
|
u32 dummy;
|
|
void *addrp;
|
|
int device = PCI_SLOT(devfn);
|
|
int function = PCI_FUNC(devfn);
|
|
int reg = where & ~3;
|
|
|
|
if (busnum == 0) {
|
|
/* Type 0 configuration for onboard PCI bus */
|
|
if (device > MAX_DEV_NUM)
|
|
return -1;
|
|
|
|
addr = (1 << (device + ID_SEL_BEGIN)) | (function << 8) | reg;
|
|
type = 0;
|
|
} else {
|
|
/* Type 1 configuration for offboard PCI bus */
|
|
addr = (busnum << 16) | (device << 11) | (function << 8) | reg;
|
|
type = 0x10000;
|
|
}
|
|
|
|
/* Clear aborts */
|
|
BONITO_PCICMD |= BONITO_PCICMD_MABORT_CLR | BONITO_PCICMD_MTABORT_CLR;
|
|
|
|
BONITO_PCIMAP_CFG = (addr >> 16) | type;
|
|
|
|
/* Flush Bonito register block */
|
|
dummy = BONITO_PCIMAP_CFG;
|
|
mmiowb();
|
|
|
|
addrp = CFG_SPACE_REG(addr & 0xffff);
|
|
if (access_type == PCI_ACCESS_WRITE) {
|
|
writel(cpu_to_le32(*data), addrp);
|
|
/* Wait till done */
|
|
while (BONITO_PCIMSTAT & 0xF);
|
|
} else {
|
|
*data = le32_to_cpu(readl(addrp));
|
|
}
|
|
|
|
/* Detect Master/Target abort */
|
|
if (BONITO_PCICMD & (BONITO_PCICMD_MABORT_CLR |
|
|
BONITO_PCICMD_MTABORT_CLR)) {
|
|
/* Error occurred */
|
|
|
|
/* Clear bits */
|
|
BONITO_PCICMD |= (BONITO_PCICMD_MABORT_CLR |
|
|
BONITO_PCICMD_MTABORT_CLR);
|
|
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* We can't address 8 and 16 bit words directly. Instead we have to
|
|
* read/write a 32bit word and mask/modify the data we actually want.
|
|
*/
|
|
static int bonito64_pcibios_read(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 * val)
|
|
{
|
|
u32 data = 0;
|
|
|
|
if ((size == 2) && (where & 1))
|
|
return PCIBIOS_BAD_REGISTER_NUMBER;
|
|
else if ((size == 4) && (where & 3))
|
|
return PCIBIOS_BAD_REGISTER_NUMBER;
|
|
|
|
if (bonito64_pcibios_config_access(PCI_ACCESS_READ, bus, devfn, where,
|
|
&data))
|
|
return -1;
|
|
|
|
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;
|
|
}
|
|
|
|
static int bonito64_pcibios_write(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 val)
|
|
{
|
|
u32 data = 0;
|
|
|
|
if ((size == 2) && (where & 1))
|
|
return PCIBIOS_BAD_REGISTER_NUMBER;
|
|
else if ((size == 4) && (where & 3))
|
|
return PCIBIOS_BAD_REGISTER_NUMBER;
|
|
|
|
if (size == 4)
|
|
data = val;
|
|
else {
|
|
if (bonito64_pcibios_config_access(PCI_ACCESS_READ, bus, devfn,
|
|
where, &data))
|
|
return -1;
|
|
|
|
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 (bonito64_pcibios_config_access(PCI_ACCESS_WRITE, bus, devfn, where,
|
|
&data))
|
|
return -1;
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
struct pci_ops bonito64_pci_ops = {
|
|
.read = bonito64_pcibios_read,
|
|
.write = bonito64_pcibios_write
|
|
};
|