You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
131 lines
3.9 KiB
131 lines
3.9 KiB
/*
|
|
* 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,
|
|
};
|
|
|