1 files changed, 100 insertions, 0 deletions

diff --git a/arch/mips/pci/ops-titan.c b/arch/mips/pci/ops-titan.c
new file mode 100644
index 00000000000..233ec6f2054
--- /dev/null
+++ b/arch/mips/pci/ops-titan.c
@@ -0,0 +1,100 @@
+/*
+ * 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/titan_dep.h>
+
+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 */
+        TITAN_WRITE(TITAN_PCI_0_CONFIG_ADDRESS, address);
+        tmp = TITAN_READ(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 */
+        TITAN_WRITE(TITAN_PCI_0_CONFIG_ADDRESS, address);
+
+        /* write the data */
+        switch (size) {
+        case 1:
+                TITAN_WRITE_8(TITAN_PCI_0_CONFIG_DATA + (~reg & 0x3), val);
+                break;
+
+        case 2:
+                TITAN_WRITE_16(TITAN_PCI_0_CONFIG_DATA + (~reg & 0x2), val);
+                break;
+
+        case 4:
+                TITAN_WRITE(TITAN_PCI_0_CONFIG_DATA, val);
+                break;
+        }
+
+        return PCIBIOS_SUCCESSFUL;
+}
+
+/*
+ * Titan PCI structure
+ */
+struct pci_ops titan_pci_ops = {
+        titan_read_config,
+        titan_write_config,
+};