Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. |
| 3 | * <benh@kernel.crashing.org> |
Benjamin Herrenschmidt | 4c9d280 | 2006-11-11 17:25:08 +1100 | [diff] [blame] | 4 | * and Arnd Bergmann, IBM Corp. |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #undef DEBUG |
| 14 | |
| 15 | #include <linux/string.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/mod_devicetable.h> |
| 20 | #include <linux/slab.h> |
Benjamin Herrenschmidt | 4c9d280 | 2006-11-11 17:25:08 +1100 | [diff] [blame] | 21 | #include <linux/pci.h> |
Grant Likely | 283029d | 2008-01-09 06:20:40 +1100 | [diff] [blame] | 22 | #include <linux/of.h> |
Stephen Rothwell | cd6eed3 | 2007-09-21 18:08:17 +1000 | [diff] [blame] | 23 | #include <linux/of_device.h> |
| 24 | #include <linux/of_platform.h> |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 25 | |
| 26 | #include <asm/errno.h> |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 27 | #include <asm/topology.h> |
Benjamin Herrenschmidt | 4c9d280 | 2006-11-11 17:25:08 +1100 | [diff] [blame] | 28 | #include <asm/pci-bridge.h> |
| 29 | #include <asm/ppc-pci.h> |
Benjamin Herrenschmidt | 9309180 | 2006-11-21 14:56:37 +1100 | [diff] [blame] | 30 | #include <asm/atomic.h> |
| 31 | |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 32 | /* |
| 33 | * The list of OF IDs below is used for matching bus types in the |
| 34 | * system whose devices are to be exposed as of_platform_devices. |
| 35 | * |
| 36 | * This is the default list valid for most platforms. This file provides |
| 37 | * functions who can take an explicit list if necessary though |
| 38 | * |
| 39 | * The search is always performed recursively looking for children of |
| 40 | * the provided device_node and recursively if such a children matches |
| 41 | * a bus type in the list |
| 42 | */ |
| 43 | |
Stephen Rothwell | b91bdd1 | 2007-12-21 15:21:51 +1100 | [diff] [blame] | 44 | static const struct of_device_id of_default_bus_ids[] = { |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 45 | { .type = "soc", }, |
| 46 | { .compatible = "soc", }, |
| 47 | { .type = "spider", }, |
| 48 | { .type = "axon", }, |
| 49 | { .type = "plb5", }, |
| 50 | { .type = "plb4", }, |
| 51 | { .type = "opb", }, |
Arnd Bergmann | 4bc1962 | 2006-12-19 15:32:46 +0100 | [diff] [blame] | 52 | { .type = "ebc", }, |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 53 | {}, |
| 54 | }; |
| 55 | |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 56 | struct bus_type of_platform_bus_type = { |
Sylvain Munaut | 1f9209c | 2007-02-12 23:13:27 +0100 | [diff] [blame] | 57 | .uevent = of_device_uevent, |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 58 | }; |
| 59 | EXPORT_SYMBOL(of_platform_bus_type); |
| 60 | |
| 61 | static int __init of_bus_driver_init(void) |
| 62 | { |
Stephen Rothwell | 3f23de1 | 2007-05-03 02:38:57 +1000 | [diff] [blame] | 63 | return of_bus_type_init(&of_platform_bus_type, "of_platform"); |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | postcore_initcall(of_bus_driver_init); |
| 67 | |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 68 | struct of_device* of_platform_device_create(struct device_node *np, |
| 69 | const char *bus_id, |
| 70 | struct device *parent) |
| 71 | { |
| 72 | struct of_device *dev; |
| 73 | |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 74 | dev = of_device_alloc(np, bus_id, parent); |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 75 | if (!dev) |
| 76 | return NULL; |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 77 | |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 78 | dev->dma_mask = 0xffffffffUL; |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 79 | dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
Vitaly Bordug | ba0fc70 | 2008-07-09 13:13:38 +1000 | [diff] [blame] | 80 | |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 81 | dev->dev.bus = &of_platform_bus_type; |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 82 | |
| 83 | /* We do not fill the DMA ops for platform devices by default. |
| 84 | * This is currently the responsibility of the platform code |
| 85 | * to do such, possibly using a device notifier |
| 86 | */ |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 87 | |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 88 | if (of_device_register(dev) != 0) { |
Joachim Fenkes | fec738d | 2007-09-26 19:44:12 +1000 | [diff] [blame] | 89 | of_device_free(dev); |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 90 | return NULL; |
| 91 | } |
| 92 | |
| 93 | return dev; |
| 94 | } |
| 95 | EXPORT_SYMBOL(of_platform_device_create); |
| 96 | |
| 97 | |
| 98 | |
| 99 | /** |
| 100 | * of_platform_bus_create - Create an OF device for a bus node and all its |
| 101 | * children. Optionally recursively instanciate matching busses. |
| 102 | * @bus: device node of the bus to instanciate |
| 103 | * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to |
| 104 | * disallow recursive creation of child busses |
| 105 | */ |
Stephen Rothwell | b91bdd1 | 2007-12-21 15:21:51 +1100 | [diff] [blame] | 106 | static int of_platform_bus_create(const struct device_node *bus, |
| 107 | const struct of_device_id *matches, |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 108 | struct device *parent) |
| 109 | { |
| 110 | struct device_node *child; |
| 111 | struct of_device *dev; |
| 112 | int rc = 0; |
| 113 | |
Stephen Rothwell | 85e99b9 | 2008-01-03 15:13:37 +1100 | [diff] [blame] | 114 | for_each_child_of_node(bus, child) { |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 115 | pr_debug(" create child: %s\n", child->full_name); |
| 116 | dev = of_platform_device_create(child, NULL, parent); |
| 117 | if (dev == NULL) |
| 118 | rc = -ENOMEM; |
| 119 | else if (!of_match_node(matches, child)) |
| 120 | continue; |
| 121 | if (rc == 0) { |
| 122 | pr_debug(" and sub busses\n"); |
| 123 | rc = of_platform_bus_create(child, matches, &dev->dev); |
| 124 | } if (rc) { |
| 125 | of_node_put(child); |
| 126 | break; |
| 127 | } |
| 128 | } |
| 129 | return rc; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * of_platform_bus_probe - Probe the device-tree for platform busses |
| 134 | * @root: parent of the first level to probe or NULL for the root of the tree |
| 135 | * @matches: match table, NULL to use the default |
| 136 | * @parent: parent to hook devices from, NULL for toplevel |
| 137 | * |
| 138 | * Note that children of the provided root are not instanciated as devices |
| 139 | * unless the specified root itself matches the bus list and is not NULL. |
| 140 | */ |
| 141 | |
| 142 | int of_platform_bus_probe(struct device_node *root, |
Stephen Rothwell | b91bdd1 | 2007-12-21 15:21:51 +1100 | [diff] [blame] | 143 | const struct of_device_id *matches, |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 144 | struct device *parent) |
| 145 | { |
| 146 | struct device_node *child; |
| 147 | struct of_device *dev; |
| 148 | int rc = 0; |
| 149 | |
| 150 | if (matches == NULL) |
| 151 | matches = of_default_bus_ids; |
| 152 | if (matches == OF_NO_DEEP_PROBE) |
| 153 | return -EINVAL; |
| 154 | if (root == NULL) |
| 155 | root = of_find_node_by_path("/"); |
| 156 | else |
| 157 | of_node_get(root); |
| 158 | |
| 159 | pr_debug("of_platform_bus_probe()\n"); |
| 160 | pr_debug(" starting at: %s\n", root->full_name); |
| 161 | |
| 162 | /* Do a self check of bus type, if there's a match, create |
| 163 | * children |
| 164 | */ |
| 165 | if (of_match_node(matches, root)) { |
| 166 | pr_debug(" root match, create all sub devices\n"); |
| 167 | dev = of_platform_device_create(root, NULL, parent); |
| 168 | if (dev == NULL) { |
| 169 | rc = -ENOMEM; |
| 170 | goto bail; |
| 171 | } |
| 172 | pr_debug(" create all sub busses\n"); |
| 173 | rc = of_platform_bus_create(root, matches, &dev->dev); |
| 174 | goto bail; |
| 175 | } |
Stephen Rothwell | 85e99b9 | 2008-01-03 15:13:37 +1100 | [diff] [blame] | 176 | for_each_child_of_node(root, child) { |
Benjamin Herrenschmidt | 7eebde7 | 2006-11-11 17:24:59 +1100 | [diff] [blame] | 177 | if (!of_match_node(matches, child)) |
| 178 | continue; |
| 179 | |
| 180 | pr_debug(" match: %s\n", child->full_name); |
| 181 | dev = of_platform_device_create(child, NULL, parent); |
| 182 | if (dev == NULL) |
| 183 | rc = -ENOMEM; |
| 184 | else |
| 185 | rc = of_platform_bus_create(child, matches, &dev->dev); |
| 186 | if (rc) { |
| 187 | of_node_put(child); |
| 188 | break; |
| 189 | } |
| 190 | } |
| 191 | bail: |
| 192 | of_node_put(root); |
| 193 | return rc; |
| 194 | } |
| 195 | EXPORT_SYMBOL(of_platform_bus_probe); |
| 196 | |
| 197 | static int of_dev_node_match(struct device *dev, void *data) |
| 198 | { |
| 199 | return to_of_device(dev)->node == data; |
| 200 | } |
| 201 | |
| 202 | struct of_device *of_find_device_by_node(struct device_node *np) |
| 203 | { |
| 204 | struct device *dev; |
| 205 | |
| 206 | dev = bus_find_device(&of_platform_bus_type, |
| 207 | NULL, np, of_dev_node_match); |
| 208 | if (dev) |
| 209 | return to_of_device(dev); |
| 210 | return NULL; |
| 211 | } |
| 212 | EXPORT_SYMBOL(of_find_device_by_node); |
| 213 | |
| 214 | static int of_dev_phandle_match(struct device *dev, void *data) |
| 215 | { |
| 216 | phandle *ph = data; |
| 217 | return to_of_device(dev)->node->linux_phandle == *ph; |
| 218 | } |
| 219 | |
| 220 | struct of_device *of_find_device_by_phandle(phandle ph) |
| 221 | { |
| 222 | struct device *dev; |
| 223 | |
| 224 | dev = bus_find_device(&of_platform_bus_type, |
| 225 | NULL, &ph, of_dev_phandle_match); |
| 226 | if (dev) |
| 227 | return to_of_device(dev); |
| 228 | return NULL; |
| 229 | } |
| 230 | EXPORT_SYMBOL(of_find_device_by_phandle); |
Benjamin Herrenschmidt | 4c9d280 | 2006-11-11 17:25:08 +1100 | [diff] [blame] | 231 | |
| 232 | |
| 233 | #ifdef CONFIG_PPC_OF_PLATFORM_PCI |
| 234 | |
| 235 | /* The probing of PCI controllers from of_platform is currently |
| 236 | * 64 bits only, mostly due to gratuitous differences between |
| 237 | * the 32 and 64 bits PCI code on PowerPC and the 32 bits one |
| 238 | * lacking some bits needed here. |
| 239 | */ |
| 240 | |
| 241 | static int __devinit of_pci_phb_probe(struct of_device *dev, |
| 242 | const struct of_device_id *match) |
| 243 | { |
| 244 | struct pci_controller *phb; |
| 245 | |
| 246 | /* Check if we can do that ... */ |
| 247 | if (ppc_md.pci_setup_phb == NULL) |
| 248 | return -ENODEV; |
| 249 | |
| 250 | printk(KERN_INFO "Setting up PCI bus %s\n", dev->node->full_name); |
| 251 | |
| 252 | /* Alloc and setup PHB data structure */ |
| 253 | phb = pcibios_alloc_controller(dev->node); |
| 254 | if (!phb) |
| 255 | return -ENODEV; |
| 256 | |
| 257 | /* Setup parent in sysfs */ |
| 258 | phb->parent = &dev->dev; |
| 259 | |
| 260 | /* Setup the PHB using arch provided callback */ |
| 261 | if (ppc_md.pci_setup_phb(phb)) { |
| 262 | pcibios_free_controller(phb); |
| 263 | return -ENODEV; |
| 264 | } |
| 265 | |
| 266 | /* Process "ranges" property */ |
| 267 | pci_process_bridge_OF_ranges(phb, dev->node, 0); |
| 268 | |
Benjamin Herrenschmidt | 4c9d280 | 2006-11-11 17:25:08 +1100 | [diff] [blame] | 269 | /* Init pci_dn data structures */ |
| 270 | pci_devs_phb_init_dynamic(phb); |
| 271 | |
| 272 | /* Register devices with EEH */ |
| 273 | #ifdef CONFIG_EEH |
| 274 | if (dev->node->child) |
| 275 | eeh_add_device_tree_early(dev->node); |
| 276 | #endif /* CONFIG_EEH */ |
| 277 | |
| 278 | /* Scan the bus */ |
| 279 | scan_phb(phb); |
Ishizaki Kou | 7cfb62a | 2008-04-24 19:21:10 +1000 | [diff] [blame] | 280 | if (phb->bus == NULL) |
| 281 | return -ENXIO; |
Benjamin Herrenschmidt | 4c9d280 | 2006-11-11 17:25:08 +1100 | [diff] [blame] | 282 | |
| 283 | /* Claim resources. This might need some rework as well depending |
| 284 | * wether we are doing probe-only or not, like assigning unassigned |
| 285 | * resources etc... |
| 286 | */ |
| 287 | pcibios_claim_one_bus(phb->bus); |
| 288 | |
| 289 | /* Finish EEH setup */ |
| 290 | #ifdef CONFIG_EEH |
| 291 | eeh_add_device_tree_late(phb->bus); |
| 292 | #endif |
| 293 | |
| 294 | /* Add probed PCI devices to the device model */ |
| 295 | pci_bus_add_devices(phb->bus); |
| 296 | |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | static struct of_device_id of_pci_phb_ids[] = { |
| 301 | { .type = "pci", }, |
| 302 | { .type = "pcix", }, |
| 303 | { .type = "pcie", }, |
| 304 | { .type = "pciex", }, |
| 305 | { .type = "ht", }, |
| 306 | {} |
| 307 | }; |
| 308 | |
| 309 | static struct of_platform_driver of_pci_phb_driver = { |
Stephen Rothwell | cd6eed3 | 2007-09-21 18:08:17 +1000 | [diff] [blame] | 310 | .match_table = of_pci_phb_ids, |
| 311 | .probe = of_pci_phb_probe, |
| 312 | .driver = { |
| 313 | .name = "of-pci", |
| 314 | }, |
Benjamin Herrenschmidt | 4c9d280 | 2006-11-11 17:25:08 +1100 | [diff] [blame] | 315 | }; |
| 316 | |
| 317 | static __init int of_pci_phb_init(void) |
| 318 | { |
| 319 | return of_register_platform_driver(&of_pci_phb_driver); |
| 320 | } |
| 321 | |
| 322 | device_initcall(of_pci_phb_init); |
| 323 | |
| 324 | #endif /* CONFIG_PPC_OF_PLATFORM_PCI */ |