/*
* 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 JMR3927.
*
* 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 <asm/addrspace.h>
#include <asm/jmr3927/jmr3927.h>
static inline int mkaddr(unsigned char bus, unsigned char dev_fn,
unsigned char where)
{
if (bus == 0 && dev_fn >= PCI_DEVFN(TX3927_PCIC_MAX_DEVNU, 0))
return PCIBIOS_DEVICE_NOT_FOUND;
tx3927_pcicptr->ica = ((bus & 0xff) << 0x10) |
((dev_fn & 0xff) << 0x08) |
(where & 0xfc);
/* 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 PCIBIOS_SUCCESSFUL;
}
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;
return PCIBIOS_DEVICE_NOT_FOUND;
return PCIBIOS_SUCCESSFUL;
}
static int jmr3927_pci_read_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 * val)
{
int ret;
ret = mkaddr(bus->number, devfn, where);
if (ret)
return ret;
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 jmr3927_pci_write_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
int ret;
ret = mkaddr(bus->number, devfn, where);
if (ret)
return ret;
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);
}
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;
return PCIBIOS_DEVICE_NOT_FOUND;
return check_abort();
}
struct pci_ops jmr3927_pci_ops = {
jmr3927_pci_read_config,
jmr3927_pci_write_config,
};
