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Diffstat (limited to 'arch/mips/pci/ops-titan.c')
-rw-r--r--arch/mips/pci/ops-titan.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/mips/pci/ops-titan.c b/arch/mips/pci/ops-titan.c
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+++ b/arch/mips/pci/ops-titan.c
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+/*
+ * 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,
+};