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Diffstat (limited to 'arch/mips/pci/fixup-rbtx4927.c')
-rw-r--r--arch/mips/pci/fixup-rbtx4927.c119
1 files changed, 26 insertions, 93 deletions
diff --git a/arch/mips/pci/fixup-rbtx4927.c b/arch/mips/pci/fixup-rbtx4927.c
index 7450c335b387..321db265829c 100644
--- a/arch/mips/pci/fixup-rbtx4927.c
+++ b/arch/mips/pci/fixup-rbtx4927.c
@@ -33,108 +33,41 @@
33 * 675 Mass Ave, Cambridge, MA 02139, USA. 33 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 */ 34 */
35#include <linux/types.h> 35#include <linux/types.h>
36#include <linux/pci.h> 36#include <asm/txx9/pci.h>
37#include <linux/kernel.h> 37#include <asm/txx9/rbtx4927.h>
38#include <linux/init.h>
39 38
40#include <asm/tx4927/tx4927.h> 39int __init rbtx4927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
41#include <asm/tx4927/tx4927_pci.h>
42
43#undef DEBUG
44#ifdef DEBUG
45#define DBG(x...) printk(x)
46#else
47#define DBG(x...)
48#endif
49
50/* look up table for backplane pci irq for slots 17-20 by pin # */
51static 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}
80};
81
82static int pci_get_irq(const struct pci_dev *dev, int pin)
83{ 40{
84 unsigned char irq = pin; 41 unsigned char irq = pin;
85 42
86 DBG("pci_get_irq: pin is %d\n", pin);
87 /* IRQ rotation */ 43 /* IRQ rotation */
88 irq--; /* 0-3 */ 44 irq--; /* 0-3 */
89 if (dev->bus->parent == NULL && 45 if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
90 PCI_SLOT(dev->devfn) == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { 46 /* PCI CardSlot (IDSEL=A23) */
91 printk("Onboard PCI_SLOT(dev->devfn) is %d\n", 47 /* PCIA => PCIA */
92 PCI_SLOT(dev->devfn)); 48 irq = (irq + 0 + slot) % 4;
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);
97
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;
111 }
112 } else { 49 } else {
113 /* PCI Backplane */ 50 /* PCI Backplane */
114 DBG("PCI Backplane PCI_SLOT(dev->devfn) is %d\n", 51 if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
115 PCI_SLOT(dev->devfn)); 52 irq = (irq + 33 - slot) % 4;
116 irq = backplane_pci_irq[PCI_SLOT(dev->devfn) - 17][irq]; 53 else
54 irq = (irq + 3 + slot) % 4;
117 } 55 }
118 DBG("assigned irq %d\n", irq); 56 irq++; /* 1-4 */
119 return irq;
120}
121
122int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
123{
124 unsigned char irq;
125
126 printk("PCI Setup for pin %d \n", pin);
127
128 if (dev->device == 0x9130) /* IDE */
129 irq = 14;
130 else
131 irq = pci_get_irq(dev, pin);
132 57
58 switch (irq) {
59 case 1:
60 irq = RBTX4927_IRQ_IOC_PCIA;
61 break;
62 case 2:
63 irq = RBTX4927_IRQ_IOC_PCIB;
64 break;
65 case 3:
66 irq = RBTX4927_IRQ_IOC_PCIC;
67 break;
68 case 4:
69 irq = RBTX4927_IRQ_IOC_PCID;
70 break;
71 }
133 return irq; 72 return irq;
134} 73}
135
136/* Do platform specific device initialization at pci_enable_device() time */
137int pcibios_plat_dev_init(struct pci_dev *dev)
138{
139 return 0;
140}