112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/*
|
|
* 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,
|
|
};
|