/*
* Copyright 2003 PMC-Sierra
* Author: Manish Lachwani (lachwani@pmc-sierra.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 <asm/pci.h>
#include <asm/io.h>
#include <asm/rm9k-ocd.h>
/*
* PCI specific defines
*/
#define TITAN_PCI_0_CONFIG_ADDRESS 0x780
#define TITAN_PCI_0_CONFIG_DATA 0x784
/*
* Titan PCI Config Read Byte
*/
static int titan_read_config(struct pci_bus *bus, unsigned int devfn, int reg,
int size, u32 * val)
{
uint32_t address, tmp;
int dev, busno, func;
busno = bus->number;
dev = PCI_SLOT(devfn);
func = PCI_FUNC(devfn);
address = (busno << 16) | (dev << 11) | (func << 8) |
(reg & 0xfc) | 0x80000000;
/* start the configuration cycle */
ocd_writel(address, TITAN_PCI_0_CONFIG_ADDRESS);
tmp = ocd_readl(TITAN_PCI_0_CONFIG_DATA) >> ((reg & 3) << 3);
switch (size) {
case 1:
tmp &= 0xff;
case 2:
tmp &= 0xffff;
}
*val = tmp;
return PCIBIOS_SUCCESSFUL;
}
static int titan_write_config(struct pci_bus *bus, unsigned int devfn, int reg,
int size, u32 val)
{
uint32_t address;
int dev, busno, func;
busno = bus->number;
dev = PCI_SLOT(devfn);
func = PCI_FUNC(devfn);
address = (busno << 16) | (dev << 11) | (func << 8) |
(reg & 0xfc) | 0x80000000;
/* start the configuration cycle */
ocd_writel(address, TITAN_PCI_0_CONFIG_ADDRESS);
/* write the data */
switch (size) {
case 1:
ocd_writeb(val, TITAN_PCI_0_CONFIG_DATA + (~reg & 0x3));
break;
case 2:
ocd_writew(val, TITAN_PCI_0_CONFIG_DATA + (~reg & 0x2));
break;
case 4:
ocd_writel(val, TITAN_PCI_0_CONFIG_DATA);
break;
}
return PCIBIOS_SUCCESSFUL;
}
/*
* Titan PCI structure
*/
struct pci_ops titan_pci_ops = {
titan_read_config,
titan_write_config,
};
