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Diffstat (limited to 'arch/mips/pci/pci.c')
-rw-r--r--arch/mips/pci/pci.c80
1 files changed, 53 insertions, 27 deletions
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index c7fe6ec621e6..a377e9d2d029 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -34,6 +34,8 @@ static struct pci_controller *hose_head, **hose_tail = &hose_head;
34unsigned long PCIBIOS_MIN_IO = 0x0000; 34unsigned long PCIBIOS_MIN_IO = 0x0000;
35unsigned long PCIBIOS_MIN_MEM = 0; 35unsigned long PCIBIOS_MIN_MEM = 0;
36 36
37static int pci_initialized;
38
37/* 39/*
38 * We need to avoid collisions with `mirrored' VGA ports 40 * We need to avoid collisions with `mirrored' VGA ports
39 * and other strange ISA hardware, so we always want the 41 * and other strange ISA hardware, so we always want the
@@ -74,6 +76,42 @@ pcibios_align_resource(void *data, struct resource *res,
74 res->start = start; 76 res->start = start;
75} 77}
76 78
79static void __devinit pcibios_scanbus(struct pci_controller *hose)
80{
81 static int next_busno;
82 static int need_domain_info;
83 struct pci_bus *bus;
84
85 if (!hose->iommu)
86 PCI_DMA_BUS_IS_PHYS = 1;
87
88 if (hose->get_busno && pci_probe_only)
89 next_busno = (*hose->get_busno)();
90
91 bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
92 hose->bus = bus;
93
94 need_domain_info = need_domain_info || hose->index;
95 hose->need_domain_info = need_domain_info;
96 if (bus) {
97 next_busno = bus->subordinate + 1;
98 /* Don't allow 8-bit bus number overflow inside the hose -
99 reserve some space for bridges. */
100 if (next_busno > 224) {
101 next_busno = 0;
102 need_domain_info = 1;
103 }
104
105 if (!pci_probe_only) {
106 pci_bus_size_bridges(bus);
107 pci_bus_assign_resources(bus);
108 pci_enable_bridges(bus);
109 }
110 }
111}
112
113static DEFINE_MUTEX(pci_scan_mutex);
114
77void __devinit register_pci_controller(struct pci_controller *hose) 115void __devinit register_pci_controller(struct pci_controller *hose)
78{ 116{
79 if (request_resource(&iomem_resource, hose->mem_resource) < 0) 117 if (request_resource(&iomem_resource, hose->mem_resource) < 0)
@@ -93,6 +131,17 @@ void __devinit register_pci_controller(struct pci_controller *hose)
93 printk(KERN_WARNING 131 printk(KERN_WARNING
94 "registering PCI controller with io_map_base unset\n"); 132 "registering PCI controller with io_map_base unset\n");
95 } 133 }
134
135 /*
136 * Scan the bus if it is register after the PCI subsystem
137 * initialization.
138 */
139 if (pci_initialized) {
140 mutex_lock(&pci_scan_mutex);
141 pcibios_scanbus(hose);
142 mutex_unlock(&pci_scan_mutex);
143 }
144
96 return; 145 return;
97 146
98out: 147out:
@@ -125,38 +174,15 @@ static u8 __init common_swizzle(struct pci_dev *dev, u8 *pinp)
125static int __init pcibios_init(void) 174static int __init pcibios_init(void)
126{ 175{
127 struct pci_controller *hose; 176 struct pci_controller *hose;
128 struct pci_bus *bus;
129 int next_busno;
130 int need_domain_info = 0;
131 177
132 /* Scan all of the recorded PCI controllers. */ 178 /* Scan all of the recorded PCI controllers. */
133 for (next_busno = 0, hose = hose_head; hose; hose = hose->next) { 179 for (hose = hose_head; hose; hose = hose->next)
134 180 pcibios_scanbus(hose);
135 if (!hose->iommu)
136 PCI_DMA_BUS_IS_PHYS = 1;
137
138 if (hose->get_busno && pci_probe_only)
139 next_busno = (*hose->get_busno)();
140
141 bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
142 hose->bus = bus;
143 need_domain_info = need_domain_info || hose->index;
144 hose->need_domain_info = need_domain_info;
145 if (bus) {
146 next_busno = bus->subordinate + 1;
147 /* Don't allow 8-bit bus number overflow inside the hose -
148 reserve some space for bridges. */
149 if (next_busno > 224) {
150 next_busno = 0;
151 need_domain_info = 1;
152 }
153 }
154 }
155 181
156 if (!pci_probe_only)
157 pci_assign_unassigned_resources();
158 pci_fixup_irqs(common_swizzle, pcibios_map_irq); 182 pci_fixup_irqs(common_swizzle, pcibios_map_irq);
159 183
184 pci_initialized = 1;
185
160 return 0; 186 return 0;
161} 187}
162 188