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17#include <linux/pci.h>
18#include <asm/pci-bridge.h>
19#include <asm/prom.h>
20
21
22
23
24static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
25{
26 const u32 *prop;
27 int len;
28
29 prop = of_get_property(np, name, &len);
30 if (prop && len >= 4)
31 return *prop;
32 return def;
33}
34
35
36
37
38
39
40unsigned int pci_parse_of_flags(u32 addr0, int bridge)
41{
42 unsigned int flags = 0;
43
44 if (addr0 & 0x02000000) {
45 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
46 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
47 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
48 if (addr0 & 0x40000000)
49 flags |= IORESOURCE_PREFETCH
50 | PCI_BASE_ADDRESS_MEM_PREFETCH;
51
52
53
54
55
56 if (!bridge && (addr0 & 0xff) == 0x30)
57 flags |= IORESOURCE_READONLY;
58 } else if (addr0 & 0x01000000)
59 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
60 if (flags)
61 flags |= IORESOURCE_SIZEALIGN;
62 return flags;
63}
64
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71
72
73static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
74{
75 u64 base, size;
76 unsigned int flags;
77 struct resource *res;
78 const u32 *addrs;
79 u32 i;
80 int proplen;
81
82 addrs = of_get_property(node, "assigned-addresses", &proplen);
83 if (!addrs)
84 return;
85 pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
86 for (; proplen >= 20; proplen -= 20, addrs += 5) {
87 flags = pci_parse_of_flags(addrs[0], 0);
88 if (!flags)
89 continue;
90 base = of_read_number(&addrs[1], 2);
91 size = of_read_number(&addrs[3], 2);
92 if (!size)
93 continue;
94 i = addrs[0] & 0xff;
95 pr_debug(" base: %llx, size: %llx, i: %x\n",
96 (unsigned long long)base,
97 (unsigned long long)size, i);
98
99 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
100 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
101 } else if (i == dev->rom_base_reg) {
102 res = &dev->resource[PCI_ROM_RESOURCE];
103 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
104 } else {
105 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
106 continue;
107 }
108 res->start = base;
109 res->end = base + size - 1;
110 res->flags = flags;
111 res->name = pci_name(dev);
112 }
113}
114
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117
118
119
120
121struct pci_dev *of_create_pci_dev(struct device_node *node,
122 struct pci_bus *bus, int devfn)
123{
124 struct pci_dev *dev;
125 const char *type;
126
127 dev = alloc_pci_dev();
128 if (!dev)
129 return NULL;
130 type = of_get_property(node, "device_type", NULL);
131 if (type == NULL)
132 type = "";
133
134 pr_debug(" create device, devfn: %x, type: %s\n", devfn, type);
135
136 dev->bus = bus;
137 dev->sysdata = node;
138 dev->dev.parent = bus->bridge;
139 dev->dev.bus = &pci_bus_type;
140 dev->devfn = devfn;
141 dev->multifunction = 0;
142 dev->needs_freset = 0;
143
144 dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
145 dev->device = get_int_prop(node, "device-id", 0xffff);
146 dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
147 dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
148
149 dev->cfg_size = pci_cfg_space_size(dev);
150
151 dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),
152 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
153 dev->class = get_int_prop(node, "class-code", 0);
154 dev->revision = get_int_prop(node, "revision-id", 0);
155
156 pr_debug(" class: 0x%x\n", dev->class);
157 pr_debug(" revision: 0x%x\n", dev->revision);
158
159 dev->current_state = 4;
160 dev->error_state = pci_channel_io_normal;
161 dev->dma_mask = 0xffffffff;
162
163 if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
164
165 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
166 dev->rom_base_reg = PCI_ROM_ADDRESS1;
167 } else if (!strcmp(type, "cardbus")) {
168 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
169 } else {
170 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
171 dev->rom_base_reg = PCI_ROM_ADDRESS;
172
173 dev->irq = NO_IRQ;
174 }
175
176 of_pci_parse_addrs(node, dev);
177
178 pr_debug(" adding to system ...\n");
179
180 pci_device_add(dev, bus);
181
182 return dev;
183}
184EXPORT_SYMBOL(of_create_pci_dev);
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194
195void __devinit of_scan_pci_bridge(struct device_node *node,
196 struct pci_dev *dev)
197{
198 struct pci_bus *bus;
199 const u32 *busrange, *ranges;
200 int len, i, mode;
201 struct resource *res;
202 unsigned int flags;
203 u64 size;
204
205 pr_debug("of_scan_pci_bridge(%s)\n", node->full_name);
206
207
208 busrange = of_get_property(node, "bus-range", &len);
209 if (busrange == NULL || len != 8) {
210 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
211 node->full_name);
212 return;
213 }
214 ranges = of_get_property(node, "ranges", &len);
215 if (ranges == NULL) {
216 printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n",
217 node->full_name);
218 return;
219 }
220
221 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
222 if (!bus) {
223 printk(KERN_ERR "Failed to create pci bus for %s\n",
224 node->full_name);
225 return;
226 }
227
228 bus->primary = dev->bus->number;
229 bus->subordinate = busrange[1];
230 bus->bridge_ctl = 0;
231 bus->sysdata = node;
232
233
234
235 res = &dev->resource[PCI_BRIDGE_RESOURCES];
236 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
237 res->flags = 0;
238 bus->resource[i] = res;
239 ++res;
240 }
241 i = 1;
242 for (; len >= 32; len -= 32, ranges += 8) {
243 flags = pci_parse_of_flags(ranges[0], 1);
244 size = of_read_number(&ranges[6], 2);
245 if (flags == 0 || size == 0)
246 continue;
247 if (flags & IORESOURCE_IO) {
248 res = bus->resource[0];
249 if (res->flags) {
250 printk(KERN_ERR "PCI: ignoring extra I/O range"
251 " for bridge %s\n", node->full_name);
252 continue;
253 }
254 } else {
255 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
256 printk(KERN_ERR "PCI: too many memory ranges"
257 " for bridge %s\n", node->full_name);
258 continue;
259 }
260 res = bus->resource[i];
261 ++i;
262 }
263 res->start = of_read_number(&ranges[1], 2);
264 res->end = res->start + size - 1;
265 res->flags = flags;
266 }
267 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
268 bus->number);
269 pr_debug(" bus name: %s\n", bus->name);
270
271 mode = PCI_PROBE_NORMAL;
272 if (ppc_md.pci_probe_mode)
273 mode = ppc_md.pci_probe_mode(bus);
274 pr_debug(" probe mode: %d\n", mode);
275
276 if (mode == PCI_PROBE_DEVTREE)
277 of_scan_bus(node, bus);
278 else if (mode == PCI_PROBE_NORMAL)
279 pci_scan_child_bus(bus);
280}
281EXPORT_SYMBOL(of_scan_pci_bridge);
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288
289static void __devinit __of_scan_bus(struct device_node *node,
290 struct pci_bus *bus, int rescan_existing)
291{
292 struct device_node *child;
293 const u32 *reg;
294 int reglen, devfn;
295 struct pci_dev *dev;
296
297 pr_debug("of_scan_bus(%s) bus no %d... \n",
298 node->full_name, bus->number);
299
300
301 for_each_child_of_node(node, child) {
302 pr_debug(" * %s\n", child->full_name);
303 reg = of_get_property(child, "reg", ®len);
304 if (reg == NULL || reglen < 20)
305 continue;
306 devfn = (reg[0] >> 8) & 0xff;
307
308
309 dev = of_create_pci_dev(child, bus, devfn);
310 if (!dev)
311 continue;
312 pr_debug(" dev header type: %x\n", dev->hdr_type);
313 }
314
315
316
317
318 if (!rescan_existing)
319 pcibios_setup_bus_self(bus);
320 pcibios_setup_bus_devices(bus);
321
322
323 list_for_each_entry(dev, &bus->devices, bus_list) {
324 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
325 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
326 struct device_node *child = pci_device_to_OF_node(dev);
327 if (dev)
328 of_scan_pci_bridge(child, dev);
329 }
330 }
331}
332
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335
336
337
338void __devinit of_scan_bus(struct device_node *node,
339 struct pci_bus *bus)
340{
341 __of_scan_bus(node, bus, 0);
342}
343EXPORT_SYMBOL_GPL(of_scan_bus);
344
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352
353void __devinit of_rescan_bus(struct device_node *node,
354 struct pci_bus *bus)
355{
356 __of_scan_bus(node, bus, 1);
357}
358EXPORT_SYMBOL_GPL(of_rescan_bus);
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