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Diffstat (limited to 'arch/i386/pci/i386.c')
-rw-r--r--arch/i386/pci/i386.c73
1 files changed, 43 insertions, 30 deletions
diff --git a/arch/i386/pci/i386.c b/arch/i386/pci/i386.c
index 10154a2cac68..43005f044424 100644
--- a/arch/i386/pci/i386.c
+++ b/arch/i386/pci/i386.c
@@ -104,16 +104,24 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
104 /* Depth-First Search on bus tree */ 104 /* Depth-First Search on bus tree */
105 list_for_each_entry(bus, bus_list, node) { 105 list_for_each_entry(bus, bus_list, node) {
106 if ((dev = bus->self)) { 106 if ((dev = bus->self)) {
107 for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) { 107 for (idx = PCI_BRIDGE_RESOURCES;
108 idx < PCI_NUM_RESOURCES; idx++) {
108 r = &dev->resource[idx]; 109 r = &dev->resource[idx];
109 if (!r->flags) 110 if (!r->flags)
110 continue; 111 continue;
111 pr = pci_find_parent_resource(dev, r); 112 pr = pci_find_parent_resource(dev, r);
112 if (!r->start || !pr || request_resource(pr, r) < 0) { 113 if (!r->start || !pr ||
113 printk(KERN_ERR "PCI: Cannot allocate resource region %d of bridge %s\n", idx, pci_name(dev)); 114 request_resource(pr, r) < 0) {
114 /* Something is wrong with the region. 115 printk(KERN_ERR "PCI: Cannot allocate "
115 Invalidate the resource to prevent child 116 "resource region %d "
116 resource allocations in this range. */ 117 "of bridge %s\n",
118 idx, pci_name(dev));
119 /*
120 * Something is wrong with the region.
121 * Invalidate the resource to prevent
122 * child resource allocations in this
123 * range.
124 */
117 r->flags = 0; 125 r->flags = 0;
118 } 126 }
119 } 127 }
@@ -131,7 +139,7 @@ static void __init pcibios_allocate_resources(int pass)
131 139
132 for_each_pci_dev(dev) { 140 for_each_pci_dev(dev) {
133 pci_read_config_word(dev, PCI_COMMAND, &command); 141 pci_read_config_word(dev, PCI_COMMAND, &command);
134 for(idx = 0; idx < 6; idx++) { 142 for (idx = 0; idx < PCI_ROM_RESOURCE; idx++) {
135 r = &dev->resource[idx]; 143 r = &dev->resource[idx];
136 if (r->parent) /* Already allocated */ 144 if (r->parent) /* Already allocated */
137 continue; 145 continue;
@@ -142,11 +150,15 @@ static void __init pcibios_allocate_resources(int pass)
142 else 150 else
143 disabled = !(command & PCI_COMMAND_MEMORY); 151 disabled = !(command & PCI_COMMAND_MEMORY);
144 if (pass == disabled) { 152 if (pass == disabled) {
145 DBG("PCI: Resource %08lx-%08lx (f=%lx, d=%d, p=%d)\n", 153 DBG("PCI: Resource %08lx-%08lx "
154 "(f=%lx, d=%d, p=%d)\n",
146 r->start, r->end, r->flags, disabled, pass); 155 r->start, r->end, r->flags, disabled, pass);
147 pr = pci_find_parent_resource(dev, r); 156 pr = pci_find_parent_resource(dev, r);
148 if (!pr || request_resource(pr, r) < 0) { 157 if (!pr || request_resource(pr, r) < 0) {
149 printk(KERN_ERR "PCI: Cannot allocate resource region %d of device %s\n", idx, pci_name(dev)); 158 printk(KERN_ERR "PCI: Cannot allocate "
159 "resource region %d "
160 "of device %s\n",
161 idx, pci_name(dev));
150 /* We'll assign a new address later */ 162 /* We'll assign a new address later */
151 r->end -= r->start; 163 r->end -= r->start;
152 r->start = 0; 164 r->start = 0;
@@ -156,12 +168,16 @@ static void __init pcibios_allocate_resources(int pass)
156 if (!pass) { 168 if (!pass) {
157 r = &dev->resource[PCI_ROM_RESOURCE]; 169 r = &dev->resource[PCI_ROM_RESOURCE];
158 if (r->flags & IORESOURCE_ROM_ENABLE) { 170 if (r->flags & IORESOURCE_ROM_ENABLE) {
159 /* Turn the ROM off, leave the resource region, but keep it unregistered. */ 171 /* Turn the ROM off, leave the resource region,
172 * but keep it unregistered. */
160 u32 reg; 173 u32 reg;
161 DBG("PCI: Switching off ROM of %s\n", pci_name(dev)); 174 DBG("PCI: Switching off ROM of %s\n",
175 pci_name(dev));
162 r->flags &= ~IORESOURCE_ROM_ENABLE; 176 r->flags &= ~IORESOURCE_ROM_ENABLE;
163 pci_read_config_dword(dev, dev->rom_base_reg, &reg); 177 pci_read_config_dword(dev,
164 pci_write_config_dword(dev, dev->rom_base_reg, reg & ~PCI_ROM_ADDRESS_ENABLE); 178 dev->rom_base_reg, &reg);
179 pci_write_config_dword(dev, dev->rom_base_reg,
180 reg & ~PCI_ROM_ADDRESS_ENABLE);
165 } 181 }
166 } 182 }
167 } 183 }
@@ -173,9 +189,11 @@ static int __init pcibios_assign_resources(void)
173 struct resource *r, *pr; 189 struct resource *r, *pr;
174 190
175 if (!(pci_probe & PCI_ASSIGN_ROMS)) { 191 if (!(pci_probe & PCI_ASSIGN_ROMS)) {
176 /* Try to use BIOS settings for ROMs, otherwise let 192 /*
177 pci_assign_unassigned_resources() allocate the new 193 * Try to use BIOS settings for ROMs, otherwise let
178 addresses. */ 194 * pci_assign_unassigned_resources() allocate the new
195 * addresses.
196 */
179 for_each_pci_dev(dev) { 197 for_each_pci_dev(dev) {
180 r = &dev->resource[PCI_ROM_RESOURCE]; 198 r = &dev->resource[PCI_ROM_RESOURCE];
181 if (!r->flags || !r->start) 199 if (!r->flags || !r->start)
@@ -215,9 +233,9 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
215 233
216 pci_read_config_word(dev, PCI_COMMAND, &cmd); 234 pci_read_config_word(dev, PCI_COMMAND, &cmd);
217 old_cmd = cmd; 235 old_cmd = cmd;
218 for(idx = 0; idx < PCI_NUM_RESOURCES; idx++) { 236 for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
219 /* Only set up the requested stuff */ 237 /* Only set up the requested stuff */
220 if (!(mask & (1<<idx))) 238 if (!(mask & (1 << idx)))
221 continue; 239 continue;
222 240
223 r = &dev->resource[idx]; 241 r = &dev->resource[idx];
@@ -227,7 +245,9 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
227 (!(r->flags & IORESOURCE_ROM_ENABLE))) 245 (!(r->flags & IORESOURCE_ROM_ENABLE)))
228 continue; 246 continue;
229 if (!r->start && r->end) { 247 if (!r->start && r->end) {
230 printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev)); 248 printk(KERN_ERR "PCI: Device %s not available "
249 "because of resource collisions\n",
250 pci_name(dev));
231 return -EINVAL; 251 return -EINVAL;
232 } 252 }
233 if (r->flags & IORESOURCE_IO) 253 if (r->flags & IORESOURCE_IO)
@@ -236,21 +256,13 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
236 cmd |= PCI_COMMAND_MEMORY; 256 cmd |= PCI_COMMAND_MEMORY;
237 } 257 }
238 if (cmd != old_cmd) { 258 if (cmd != old_cmd) {
239 printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd); 259 printk("PCI: Enabling device %s (%04x -> %04x)\n",
260 pci_name(dev), old_cmd, cmd);
240 pci_write_config_word(dev, PCI_COMMAND, cmd); 261 pci_write_config_word(dev, PCI_COMMAND, cmd);
241 } 262 }
242 return 0; 263 return 0;
243} 264}
244 265
245void pcibios_disable_resources(struct pci_dev *dev)
246{
247 u16 cmd;
248
249 pci_read_config_word(dev, PCI_COMMAND, &cmd);
250 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
251 pci_write_config_word(dev, PCI_COMMAND, cmd);
252}
253
254/* 266/*
255 * If we set up a device for bus mastering, we need to check the latency 267 * If we set up a device for bus mastering, we need to check the latency
256 * timer as certain crappy BIOSes forget to set it properly. 268 * timer as certain crappy BIOSes forget to set it properly.
@@ -267,7 +279,8 @@ void pcibios_set_master(struct pci_dev *dev)
267 lat = pcibios_max_latency; 279 lat = pcibios_max_latency;
268 else 280 else
269 return; 281 return;
270 printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat); 282 printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n",
283 pci_name(dev), lat);
271 pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat); 284 pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
272} 285}
273 286