1 /*
2 * Copyright 2001 MontaVista Software Inc.
3 * Author: MontaVista Software, Inc.
4 * stevel@mvista.com or source@mvista.com
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
12 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
14 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
17 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
18 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 *
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 #include <linux/types.h>
28 #include <linux/pci.h>
29 #include <linux/kernel.h>
30
31 #include <asm/mach-rc32434/rc32434.h>
32 #include <asm/mach-rc32434/irq.h>
33
34 static int irq_map[2][12] = {
35 {0, 0, 2, 3, 2, 3, 0, 0, 0, 0, 0, 1},
36 {0, 0, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3}
37 };
38
39 int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
40 {
41 int irq = 0;
42
43 if (dev->bus->number < 2 && PCI_SLOT(dev->devfn) < 12)
44 irq = irq_map[dev->bus->number][PCI_SLOT(dev->devfn)];
45
46 return irq + GROUP4_IRQ_BASE + 4;
47 }
48
49 static void rc32434_pci_early_fixup(struct pci_dev *dev)
50 {
51 if (PCI_SLOT(dev->devfn) == 6 && dev->bus->number == 0) {
52 /* disable prefetched memory range */
53 pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0);
54 pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10);
55
56 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4);
57 }
58 }
59
60 /*
61 * The fixup applies to both the IDT and VIA devices present on the board
62 */
63 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, rc32434_pci_early_fixup);
64
65 /* Do platform specific device initialization at pci_enable_device() time */
66 int pcibios_plat_dev_init(struct pci_dev *dev)
67 {
68 return 0;
69 }