Linux 2.6.25-rc4
[linux-2.6/next.git] / arch / mips / pci / fixup-rbtx4927.c
blob7450c335b387529d16d7c388d88e207629f3dbfd
1 /*
3 * BRIEF MODULE DESCRIPTION
4 * Board specific pci fixups for the Toshiba rbtx4927
6 * Copyright 2001 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc.
8 * ppopov@mvista.com or source@mvista.com
10 * Copyright (C) 2000-2001 Toshiba Corporation
12 * Copyright (C) 2004 MontaVista Software Inc.
13 * Author: Manish Lachwani (mlachwani@mvista.com)
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
35 #include <linux/types.h>
36 #include <linux/pci.h>
37 #include <linux/kernel.h>
38 #include <linux/init.h>
40 #include <asm/tx4927/tx4927.h>
41 #include <asm/tx4927/tx4927_pci.h>
43 #undef DEBUG
44 #ifdef DEBUG
45 #define DBG(x...) printk(x)
46 #else
47 #define DBG(x...)
48 #endif
50 /* look up table for backplane pci irq for slots 17-20 by pin # */
51 static unsigned char backplane_pci_irq[4][4] = {
52 /* PJ6 SLOT: 17, PIN: 1 */ {TX4927_IRQ_IOC_PCIA,
53 /* PJ6 SLOT: 17, PIN: 2 */
54 TX4927_IRQ_IOC_PCIB,
55 /* PJ6 SLOT: 17, PIN: 3 */
56 TX4927_IRQ_IOC_PCIC,
57 /* PJ6 SLOT: 17, PIN: 4 */
58 TX4927_IRQ_IOC_PCID},
59 /* SB SLOT: 18, PIN: 1 */ {TX4927_IRQ_IOC_PCIB,
60 /* SB SLOT: 18, PIN: 2 */
61 TX4927_IRQ_IOC_PCIC,
62 /* SB SLOT: 18, PIN: 3 */
63 TX4927_IRQ_IOC_PCID,
64 /* SB SLOT: 18, PIN: 4 */
65 TX4927_IRQ_IOC_PCIA},
66 /* PJ5 SLOT: 19, PIN: 1 */ {TX4927_IRQ_IOC_PCIC,
67 /* PJ5 SLOT: 19, PIN: 2 */
68 TX4927_IRQ_IOC_PCID,
69 /* PJ5 SLOT: 19, PIN: 3 */
70 TX4927_IRQ_IOC_PCIA,
71 /* PJ5 SLOT: 19, PIN: 4 */
72 TX4927_IRQ_IOC_PCIB},
73 /* PJ4 SLOT: 20, PIN: 1 */ {TX4927_IRQ_IOC_PCID,
74 /* PJ4 SLOT: 20, PIN: 2 */
75 TX4927_IRQ_IOC_PCIA,
76 /* PJ4 SLOT: 20, PIN: 3 */
77 TX4927_IRQ_IOC_PCIB,
78 /* PJ4 SLOT: 20, PIN: 4 */
79 TX4927_IRQ_IOC_PCIC}
82 static int pci_get_irq(const struct pci_dev *dev, int pin)
84 unsigned char irq = pin;
86 DBG("pci_get_irq: pin is %d\n", pin);
87 /* IRQ rotation */
88 irq--; /* 0-3 */
89 if (dev->bus->parent == NULL &&
90 PCI_SLOT(dev->devfn) == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
91 printk("Onboard PCI_SLOT(dev->devfn) is %d\n",
92 PCI_SLOT(dev->devfn));
93 /* IDSEL=A23 is tx4927 onboard pci slot */
94 irq = (irq + PCI_SLOT(dev->devfn)) % 4;
95 irq++; /* 1-4 */
96 DBG("irq is now %d\n", irq);
98 switch (irq) {
99 case 1:
100 irq = TX4927_IRQ_IOC_PCIA;
101 break;
102 case 2:
103 irq = TX4927_IRQ_IOC_PCIB;
104 break;
105 case 3:
106 irq = TX4927_IRQ_IOC_PCIC;
107 break;
108 case 4:
109 irq = TX4927_IRQ_IOC_PCID;
110 break;
112 } else {
113 /* PCI Backplane */
114 DBG("PCI Backplane PCI_SLOT(dev->devfn) is %d\n",
115 PCI_SLOT(dev->devfn));
116 irq = backplane_pci_irq[PCI_SLOT(dev->devfn) - 17][irq];
118 DBG("assigned irq %d\n", irq);
119 return irq;
122 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
124 unsigned char irq;
126 printk("PCI Setup for pin %d \n", pin);
128 if (dev->device == 0x9130) /* IDE */
129 irq = 14;
130 else
131 irq = pci_get_irq(dev, pin);
133 return irq;
136 /* Do platform specific device initialization at pci_enable_device() time */
137 int pcibios_plat_dev_init(struct pci_dev *dev)
139 return 0;