2 * Copyright 2003 PMC-Sierra
3 * Author: Manish Lachwani (lachwani@pmc-sierra.com)
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
11 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
13 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
14 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
15 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
16 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
17 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
18 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
19 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <linux/types.h>
26 #include <linux/pci.h>
27 #include <linux/kernel.h>
29 #include <asm/titan_dep.h>
31 static int titan_read_config(struct pci_bus *bus, unsigned int devfn, int reg,
34 uint32_t address, tmp;
38 dev = PCI_SLOT(devfn);
39 func = PCI_FUNC(devfn);
41 address = (busno << 16) | (dev << 11) | (func << 8) |
42 (reg & 0xfc) | 0x80000000;
45 /* start the configuration cycle */
46 TITAN_WRITE(TITAN_PCI_0_CONFIG_ADDRESS, address);
47 tmp = TITAN_READ(TITAN_PCI_0_CONFIG_DATA) >> ((reg & 3) << 3);
57 return PCIBIOS_SUCCESSFUL;
60 static int titan_write_config(struct pci_bus *bus, unsigned int devfn, int reg,
67 dev = PCI_SLOT(devfn);
68 func = PCI_FUNC(devfn);
70 address = (busno << 16) | (dev << 11) | (func << 8) |
71 (reg & 0xfc) | 0x80000000;
73 /* start the configuration cycle */
74 TITAN_WRITE(TITAN_PCI_0_CONFIG_ADDRESS, address);
79 TITAN_WRITE_8(TITAN_PCI_0_CONFIG_DATA + (~reg & 0x3), val);
83 TITAN_WRITE_16(TITAN_PCI_0_CONFIG_DATA + (~reg & 0x2), val);
87 TITAN_WRITE(TITAN_PCI_0_CONFIG_DATA, val);
91 return PCIBIOS_SUCCESSFUL;
97 struct pci_ops titan_pci_ops = {