Grant Likely | 6b884a8 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 1 | |
Arnd Bergmann | 5019f0b | 2012-04-11 17:30:11 +0000 | [diff] [blame] | 2 | #include <linux/device.h> |
Grant Likely | 6b884a8 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 3 | #include <linux/io.h> |
| 4 | #include <linux/ioport.h> |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 5 | #include <linux/module.h> |
Grant Likely | 6b884a8 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 6 | #include <linux/of_address.h> |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 7 | #include <linux/pci_regs.h> |
Liviu Dudau | 41f8bba | 2014-09-29 15:29:21 +0100 | [diff] [blame] | 8 | #include <linux/sizes.h> |
| 9 | #include <linux/slab.h> |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 10 | #include <linux/string.h> |
Grant Likely | 6b884a8 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 11 | |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 12 | /* Max address size we deal with */ |
| 13 | #define OF_MAX_ADDR_CELLS 4 |
Stephen Warren | 5d61b16 | 2012-07-25 17:34:37 -0600 | [diff] [blame] | 14 | #define OF_CHECK_ADDR_COUNT(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS) |
| 15 | #define OF_CHECK_COUNTS(na, ns) (OF_CHECK_ADDR_COUNT(na) && (ns) > 0) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 16 | |
| 17 | static struct of_bus *of_match_bus(struct device_node *np); |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 18 | static int __of_address_to_resource(struct device_node *dev, |
| 19 | const __be32 *addrp, u64 size, unsigned int flags, |
Benoit Cousson | 35f3da3 | 2011-12-05 15:23:55 +0100 | [diff] [blame] | 20 | const char *name, struct resource *r); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 21 | |
| 22 | /* Debug utility */ |
| 23 | #ifdef DEBUG |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 24 | static void of_dump_addr(const char *s, const __be32 *addr, int na) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 25 | { |
| 26 | printk(KERN_DEBUG "%s", s); |
| 27 | while (na--) |
Grant Likely | 154063a9 | 2010-06-08 07:48:11 -0600 | [diff] [blame] | 28 | printk(" %08x", be32_to_cpu(*(addr++))); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 29 | printk("\n"); |
| 30 | } |
| 31 | #else |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 32 | static void of_dump_addr(const char *s, const __be32 *addr, int na) { } |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 33 | #endif |
| 34 | |
| 35 | /* Callbacks for bus specific translators */ |
| 36 | struct of_bus { |
| 37 | const char *name; |
| 38 | const char *addresses; |
| 39 | int (*match)(struct device_node *parent); |
| 40 | void (*count_cells)(struct device_node *child, |
| 41 | int *addrc, int *sizec); |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 42 | u64 (*map)(__be32 *addr, const __be32 *range, |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 43 | int na, int ns, int pna); |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 44 | int (*translate)(__be32 *addr, u64 offset, int na); |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 45 | unsigned int (*get_flags)(const __be32 *addr); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | /* |
| 49 | * Default translator (generic bus) |
| 50 | */ |
| 51 | |
| 52 | static void of_bus_default_count_cells(struct device_node *dev, |
| 53 | int *addrc, int *sizec) |
| 54 | { |
| 55 | if (addrc) |
| 56 | *addrc = of_n_addr_cells(dev); |
| 57 | if (sizec) |
| 58 | *sizec = of_n_size_cells(dev); |
| 59 | } |
| 60 | |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 61 | static u64 of_bus_default_map(__be32 *addr, const __be32 *range, |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 62 | int na, int ns, int pna) |
| 63 | { |
| 64 | u64 cp, s, da; |
| 65 | |
| 66 | cp = of_read_number(range, na); |
| 67 | s = of_read_number(range + na + pna, ns); |
| 68 | da = of_read_number(addr, na); |
| 69 | |
| 70 | pr_debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", |
| 71 | (unsigned long long)cp, (unsigned long long)s, |
| 72 | (unsigned long long)da); |
| 73 | |
| 74 | if (da < cp || da >= (cp + s)) |
| 75 | return OF_BAD_ADDR; |
| 76 | return da - cp; |
| 77 | } |
| 78 | |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 79 | static int of_bus_default_translate(__be32 *addr, u64 offset, int na) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 80 | { |
| 81 | u64 a = of_read_number(addr, na); |
| 82 | memset(addr, 0, na * 4); |
| 83 | a += offset; |
| 84 | if (na > 1) |
Grant Likely | 154063a9 | 2010-06-08 07:48:11 -0600 | [diff] [blame] | 85 | addr[na - 2] = cpu_to_be32(a >> 32); |
| 86 | addr[na - 1] = cpu_to_be32(a & 0xffffffffu); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 87 | |
| 88 | return 0; |
| 89 | } |
| 90 | |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 91 | static unsigned int of_bus_default_get_flags(const __be32 *addr) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 92 | { |
| 93 | return IORESOURCE_MEM; |
| 94 | } |
| 95 | |
Gregory CLEMENT | 25a3157 | 2014-02-19 23:14:55 +0100 | [diff] [blame] | 96 | #ifdef CONFIG_OF_ADDRESS_PCI |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 97 | /* |
| 98 | * PCI bus specific translator |
| 99 | */ |
| 100 | |
| 101 | static int of_bus_pci_match(struct device_node *np) |
| 102 | { |
Benjamin Herrenschmidt | 6dd18e4 | 2013-07-03 16:01:10 +1000 | [diff] [blame] | 103 | /* |
Kleber Sacilotto de Souza | 14e2abb | 2014-02-03 13:31:03 -0200 | [diff] [blame] | 104 | * "pciex" is PCI Express |
Benjamin Herrenschmidt | 6dd18e4 | 2013-07-03 16:01:10 +1000 | [diff] [blame] | 105 | * "vci" is for the /chaos bridge on 1st-gen PCI powermacs |
| 106 | * "ht" is hypertransport |
| 107 | */ |
Kleber Sacilotto de Souza | 14e2abb | 2014-02-03 13:31:03 -0200 | [diff] [blame] | 108 | return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex") || |
| 109 | !strcmp(np->type, "vci") || !strcmp(np->type, "ht"); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | static void of_bus_pci_count_cells(struct device_node *np, |
| 113 | int *addrc, int *sizec) |
| 114 | { |
| 115 | if (addrc) |
| 116 | *addrc = 3; |
| 117 | if (sizec) |
| 118 | *sizec = 2; |
| 119 | } |
| 120 | |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 121 | static unsigned int of_bus_pci_get_flags(const __be32 *addr) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 122 | { |
| 123 | unsigned int flags = 0; |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 124 | u32 w = be32_to_cpup(addr); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 125 | |
| 126 | switch((w >> 24) & 0x03) { |
| 127 | case 0x01: |
| 128 | flags |= IORESOURCE_IO; |
| 129 | break; |
| 130 | case 0x02: /* 32 bits */ |
| 131 | case 0x03: /* 64 bits */ |
| 132 | flags |= IORESOURCE_MEM; |
| 133 | break; |
| 134 | } |
| 135 | if (w & 0x40000000) |
| 136 | flags |= IORESOURCE_PREFETCH; |
| 137 | return flags; |
| 138 | } |
| 139 | |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 140 | static u64 of_bus_pci_map(__be32 *addr, const __be32 *range, int na, int ns, |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 141 | int pna) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 142 | { |
| 143 | u64 cp, s, da; |
| 144 | unsigned int af, rf; |
| 145 | |
| 146 | af = of_bus_pci_get_flags(addr); |
| 147 | rf = of_bus_pci_get_flags(range); |
| 148 | |
| 149 | /* Check address type match */ |
| 150 | if ((af ^ rf) & (IORESOURCE_MEM | IORESOURCE_IO)) |
| 151 | return OF_BAD_ADDR; |
| 152 | |
| 153 | /* Read address values, skipping high cell */ |
| 154 | cp = of_read_number(range + 1, na - 1); |
| 155 | s = of_read_number(range + na + pna, ns); |
| 156 | da = of_read_number(addr + 1, na - 1); |
| 157 | |
| 158 | pr_debug("OF: PCI map, cp=%llx, s=%llx, da=%llx\n", |
| 159 | (unsigned long long)cp, (unsigned long long)s, |
| 160 | (unsigned long long)da); |
| 161 | |
| 162 | if (da < cp || da >= (cp + s)) |
| 163 | return OF_BAD_ADDR; |
| 164 | return da - cp; |
| 165 | } |
| 166 | |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 167 | static int of_bus_pci_translate(__be32 *addr, u64 offset, int na) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 168 | { |
| 169 | return of_bus_default_translate(addr + 1, offset, na - 1); |
| 170 | } |
Gregory CLEMENT | 25a3157 | 2014-02-19 23:14:55 +0100 | [diff] [blame] | 171 | #endif /* CONFIG_OF_ADDRESS_PCI */ |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 172 | |
Gregory CLEMENT | 25a3157 | 2014-02-19 23:14:55 +0100 | [diff] [blame] | 173 | #ifdef CONFIG_PCI |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 174 | const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size, |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 175 | unsigned int *flags) |
| 176 | { |
Jeremy Kerr | a9fadee | 2010-10-10 21:24:10 -0600 | [diff] [blame] | 177 | const __be32 *prop; |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 178 | unsigned int psize; |
| 179 | struct device_node *parent; |
| 180 | struct of_bus *bus; |
| 181 | int onesize, i, na, ns; |
| 182 | |
| 183 | /* Get parent & match bus type */ |
| 184 | parent = of_get_parent(dev); |
| 185 | if (parent == NULL) |
| 186 | return NULL; |
| 187 | bus = of_match_bus(parent); |
| 188 | if (strcmp(bus->name, "pci")) { |
| 189 | of_node_put(parent); |
| 190 | return NULL; |
| 191 | } |
| 192 | bus->count_cells(dev, &na, &ns); |
| 193 | of_node_put(parent); |
Stephen Warren | 5d61b16 | 2012-07-25 17:34:37 -0600 | [diff] [blame] | 194 | if (!OF_CHECK_ADDR_COUNT(na)) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 195 | return NULL; |
| 196 | |
| 197 | /* Get "reg" or "assigned-addresses" property */ |
| 198 | prop = of_get_property(dev, bus->addresses, &psize); |
| 199 | if (prop == NULL) |
| 200 | return NULL; |
| 201 | psize /= 4; |
| 202 | |
| 203 | onesize = na + ns; |
Grant Likely | 154063a9 | 2010-06-08 07:48:11 -0600 | [diff] [blame] | 204 | for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) { |
| 205 | u32 val = be32_to_cpu(prop[0]); |
| 206 | if ((val & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) { |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 207 | if (size) |
| 208 | *size = of_read_number(prop + na, ns); |
| 209 | if (flags) |
| 210 | *flags = bus->get_flags(prop); |
| 211 | return prop; |
| 212 | } |
Grant Likely | 154063a9 | 2010-06-08 07:48:11 -0600 | [diff] [blame] | 213 | } |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 214 | return NULL; |
| 215 | } |
| 216 | EXPORT_SYMBOL(of_get_pci_address); |
| 217 | |
| 218 | int of_pci_address_to_resource(struct device_node *dev, int bar, |
| 219 | struct resource *r) |
| 220 | { |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 221 | const __be32 *addrp; |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 222 | u64 size; |
| 223 | unsigned int flags; |
| 224 | |
| 225 | addrp = of_get_pci_address(dev, bar, &size, &flags); |
| 226 | if (addrp == NULL) |
| 227 | return -EINVAL; |
Benoit Cousson | 35f3da3 | 2011-12-05 15:23:55 +0100 | [diff] [blame] | 228 | return __of_address_to_resource(dev, addrp, size, flags, NULL, r); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 229 | } |
| 230 | EXPORT_SYMBOL_GPL(of_pci_address_to_resource); |
Andrew Murray | 29b635c | 2013-05-16 17:55:17 +0200 | [diff] [blame] | 231 | |
| 232 | int of_pci_range_parser_init(struct of_pci_range_parser *parser, |
| 233 | struct device_node *node) |
| 234 | { |
| 235 | const int na = 3, ns = 2; |
| 236 | int rlen; |
| 237 | |
| 238 | parser->node = node; |
| 239 | parser->pna = of_n_addr_cells(node); |
| 240 | parser->np = parser->pna + na + ns; |
| 241 | |
| 242 | parser->range = of_get_property(node, "ranges", &rlen); |
| 243 | if (parser->range == NULL) |
| 244 | return -ENOENT; |
| 245 | |
| 246 | parser->end = parser->range + rlen / sizeof(__be32); |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | EXPORT_SYMBOL_GPL(of_pci_range_parser_init); |
| 251 | |
| 252 | struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser, |
| 253 | struct of_pci_range *range) |
| 254 | { |
| 255 | const int na = 3, ns = 2; |
| 256 | |
| 257 | if (!range) |
| 258 | return NULL; |
| 259 | |
| 260 | if (!parser->range || parser->range + parser->np > parser->end) |
| 261 | return NULL; |
| 262 | |
| 263 | range->pci_space = parser->range[0]; |
| 264 | range->flags = of_bus_pci_get_flags(parser->range); |
| 265 | range->pci_addr = of_read_number(parser->range + 1, ns); |
| 266 | range->cpu_addr = of_translate_address(parser->node, |
| 267 | parser->range + na); |
| 268 | range->size = of_read_number(parser->range + parser->pna + na, ns); |
| 269 | |
| 270 | parser->range += parser->np; |
| 271 | |
| 272 | /* Now consume following elements while they are contiguous */ |
| 273 | while (parser->range + parser->np <= parser->end) { |
| 274 | u32 flags, pci_space; |
| 275 | u64 pci_addr, cpu_addr, size; |
| 276 | |
| 277 | pci_space = be32_to_cpup(parser->range); |
| 278 | flags = of_bus_pci_get_flags(parser->range); |
| 279 | pci_addr = of_read_number(parser->range + 1, ns); |
| 280 | cpu_addr = of_translate_address(parser->node, |
| 281 | parser->range + na); |
| 282 | size = of_read_number(parser->range + parser->pna + na, ns); |
| 283 | |
| 284 | if (flags != range->flags) |
| 285 | break; |
| 286 | if (pci_addr != range->pci_addr + range->size || |
| 287 | cpu_addr != range->cpu_addr + range->size) |
| 288 | break; |
| 289 | |
| 290 | range->size += size; |
| 291 | parser->range += parser->np; |
| 292 | } |
| 293 | |
| 294 | return range; |
| 295 | } |
| 296 | EXPORT_SYMBOL_GPL(of_pci_range_parser_one); |
| 297 | |
Liviu Dudau | 0b0b089 | 2014-09-29 15:29:25 +0100 | [diff] [blame] | 298 | /* |
| 299 | * of_pci_range_to_resource - Create a resource from an of_pci_range |
| 300 | * @range: the PCI range that describes the resource |
| 301 | * @np: device node where the range belongs to |
| 302 | * @res: pointer to a valid resource that will be updated to |
| 303 | * reflect the values contained in the range. |
| 304 | * |
| 305 | * Returns EINVAL if the range cannot be converted to resource. |
| 306 | * |
| 307 | * Note that if the range is an IO range, the resource will be converted |
| 308 | * using pci_address_to_pio() which can fail if it is called too early or |
| 309 | * if the range cannot be matched to any host bridge IO space (our case here). |
| 310 | * To guard against that we try to register the IO range first. |
| 311 | * If that fails we know that pci_address_to_pio() will do too. |
| 312 | */ |
| 313 | int of_pci_range_to_resource(struct of_pci_range *range, |
| 314 | struct device_node *np, struct resource *res) |
Liviu Dudau | 83bbde1 | 2014-09-29 15:29:24 +0100 | [diff] [blame] | 315 | { |
Liviu Dudau | 0b0b089 | 2014-09-29 15:29:25 +0100 | [diff] [blame] | 316 | int err; |
Liviu Dudau | 83bbde1 | 2014-09-29 15:29:24 +0100 | [diff] [blame] | 317 | res->flags = range->flags; |
Liviu Dudau | 83bbde1 | 2014-09-29 15:29:24 +0100 | [diff] [blame] | 318 | res->parent = res->child = res->sibling = NULL; |
| 319 | res->name = np->full_name; |
Liviu Dudau | 0b0b089 | 2014-09-29 15:29:25 +0100 | [diff] [blame] | 320 | |
| 321 | if (res->flags & IORESOURCE_IO) { |
| 322 | unsigned long port; |
| 323 | err = pci_register_io_range(range->cpu_addr, range->size); |
| 324 | if (err) |
| 325 | goto invalid_range; |
| 326 | port = pci_address_to_pio(range->cpu_addr); |
| 327 | if (port == (unsigned long)-1) { |
| 328 | err = -EINVAL; |
| 329 | goto invalid_range; |
| 330 | } |
| 331 | res->start = port; |
| 332 | } else { |
| 333 | res->start = range->cpu_addr; |
| 334 | } |
| 335 | res->end = res->start + range->size - 1; |
| 336 | return 0; |
| 337 | |
| 338 | invalid_range: |
| 339 | res->start = (resource_size_t)OF_BAD_ADDR; |
| 340 | res->end = (resource_size_t)OF_BAD_ADDR; |
| 341 | return err; |
Liviu Dudau | 83bbde1 | 2014-09-29 15:29:24 +0100 | [diff] [blame] | 342 | } |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 343 | #endif /* CONFIG_PCI */ |
| 344 | |
| 345 | /* |
| 346 | * ISA bus specific translator |
| 347 | */ |
| 348 | |
| 349 | static int of_bus_isa_match(struct device_node *np) |
| 350 | { |
| 351 | return !strcmp(np->name, "isa"); |
| 352 | } |
| 353 | |
| 354 | static void of_bus_isa_count_cells(struct device_node *child, |
| 355 | int *addrc, int *sizec) |
| 356 | { |
| 357 | if (addrc) |
| 358 | *addrc = 2; |
| 359 | if (sizec) |
| 360 | *sizec = 1; |
| 361 | } |
| 362 | |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 363 | static u64 of_bus_isa_map(__be32 *addr, const __be32 *range, int na, int ns, |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 364 | int pna) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 365 | { |
| 366 | u64 cp, s, da; |
| 367 | |
| 368 | /* Check address type match */ |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 369 | if ((addr[0] ^ range[0]) & cpu_to_be32(1)) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 370 | return OF_BAD_ADDR; |
| 371 | |
| 372 | /* Read address values, skipping high cell */ |
| 373 | cp = of_read_number(range + 1, na - 1); |
| 374 | s = of_read_number(range + na + pna, ns); |
| 375 | da = of_read_number(addr + 1, na - 1); |
| 376 | |
| 377 | pr_debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", |
| 378 | (unsigned long long)cp, (unsigned long long)s, |
| 379 | (unsigned long long)da); |
| 380 | |
| 381 | if (da < cp || da >= (cp + s)) |
| 382 | return OF_BAD_ADDR; |
| 383 | return da - cp; |
| 384 | } |
| 385 | |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 386 | static int of_bus_isa_translate(__be32 *addr, u64 offset, int na) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 387 | { |
| 388 | return of_bus_default_translate(addr + 1, offset, na - 1); |
| 389 | } |
| 390 | |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 391 | static unsigned int of_bus_isa_get_flags(const __be32 *addr) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 392 | { |
| 393 | unsigned int flags = 0; |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 394 | u32 w = be32_to_cpup(addr); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 395 | |
| 396 | if (w & 1) |
| 397 | flags |= IORESOURCE_IO; |
| 398 | else |
| 399 | flags |= IORESOURCE_MEM; |
| 400 | return flags; |
| 401 | } |
| 402 | |
| 403 | /* |
| 404 | * Array of bus specific translators |
| 405 | */ |
| 406 | |
| 407 | static struct of_bus of_busses[] = { |
Gregory CLEMENT | 25a3157 | 2014-02-19 23:14:55 +0100 | [diff] [blame] | 408 | #ifdef CONFIG_OF_ADDRESS_PCI |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 409 | /* PCI */ |
| 410 | { |
| 411 | .name = "pci", |
| 412 | .addresses = "assigned-addresses", |
| 413 | .match = of_bus_pci_match, |
| 414 | .count_cells = of_bus_pci_count_cells, |
| 415 | .map = of_bus_pci_map, |
| 416 | .translate = of_bus_pci_translate, |
| 417 | .get_flags = of_bus_pci_get_flags, |
| 418 | }, |
Gregory CLEMENT | 25a3157 | 2014-02-19 23:14:55 +0100 | [diff] [blame] | 419 | #endif /* CONFIG_OF_ADDRESS_PCI */ |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 420 | /* ISA */ |
| 421 | { |
| 422 | .name = "isa", |
| 423 | .addresses = "reg", |
| 424 | .match = of_bus_isa_match, |
| 425 | .count_cells = of_bus_isa_count_cells, |
| 426 | .map = of_bus_isa_map, |
| 427 | .translate = of_bus_isa_translate, |
| 428 | .get_flags = of_bus_isa_get_flags, |
| 429 | }, |
| 430 | /* Default */ |
| 431 | { |
| 432 | .name = "default", |
| 433 | .addresses = "reg", |
| 434 | .match = NULL, |
| 435 | .count_cells = of_bus_default_count_cells, |
| 436 | .map = of_bus_default_map, |
| 437 | .translate = of_bus_default_translate, |
| 438 | .get_flags = of_bus_default_get_flags, |
| 439 | }, |
| 440 | }; |
| 441 | |
| 442 | static struct of_bus *of_match_bus(struct device_node *np) |
| 443 | { |
| 444 | int i; |
| 445 | |
| 446 | for (i = 0; i < ARRAY_SIZE(of_busses); i++) |
| 447 | if (!of_busses[i].match || of_busses[i].match(np)) |
| 448 | return &of_busses[i]; |
| 449 | BUG(); |
| 450 | return NULL; |
| 451 | } |
| 452 | |
| 453 | static int of_translate_one(struct device_node *parent, struct of_bus *bus, |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 454 | struct of_bus *pbus, __be32 *addr, |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 455 | int na, int ns, int pna, const char *rprop) |
| 456 | { |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 457 | const __be32 *ranges; |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 458 | unsigned int rlen; |
| 459 | int rone; |
| 460 | u64 offset = OF_BAD_ADDR; |
| 461 | |
| 462 | /* Normally, an absence of a "ranges" property means we are |
| 463 | * crossing a non-translatable boundary, and thus the addresses |
| 464 | * below the current not cannot be converted to CPU physical ones. |
| 465 | * Unfortunately, while this is very clear in the spec, it's not |
| 466 | * what Apple understood, and they do have things like /uni-n or |
| 467 | * /ht nodes with no "ranges" property and a lot of perfectly |
| 468 | * useable mapped devices below them. Thus we treat the absence of |
| 469 | * "ranges" as equivalent to an empty "ranges" property which means |
| 470 | * a 1:1 translation at that level. It's up to the caller not to try |
| 471 | * to translate addresses that aren't supposed to be translated in |
| 472 | * the first place. --BenH. |
Grant Likely | 3930f29 | 2010-06-08 07:48:11 -0600 | [diff] [blame] | 473 | * |
| 474 | * As far as we know, this damage only exists on Apple machines, so |
| 475 | * This code is only enabled on powerpc. --gcl |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 476 | */ |
| 477 | ranges = of_get_property(parent, rprop, &rlen); |
Grant Likely | 3930f29 | 2010-06-08 07:48:11 -0600 | [diff] [blame] | 478 | #if !defined(CONFIG_PPC) |
| 479 | if (ranges == NULL) { |
| 480 | pr_err("OF: no ranges; cannot translate\n"); |
| 481 | return 1; |
| 482 | } |
| 483 | #endif /* !defined(CONFIG_PPC) */ |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 484 | if (ranges == NULL || rlen == 0) { |
| 485 | offset = of_read_number(addr, na); |
| 486 | memset(addr, 0, pna * 4); |
Grant Likely | 3930f29 | 2010-06-08 07:48:11 -0600 | [diff] [blame] | 487 | pr_debug("OF: empty ranges; 1:1 translation\n"); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 488 | goto finish; |
| 489 | } |
| 490 | |
| 491 | pr_debug("OF: walking ranges...\n"); |
| 492 | |
| 493 | /* Now walk through the ranges */ |
| 494 | rlen /= 4; |
| 495 | rone = na + pna + ns; |
| 496 | for (; rlen >= rone; rlen -= rone, ranges += rone) { |
| 497 | offset = bus->map(addr, ranges, na, ns, pna); |
| 498 | if (offset != OF_BAD_ADDR) |
| 499 | break; |
| 500 | } |
| 501 | if (offset == OF_BAD_ADDR) { |
| 502 | pr_debug("OF: not found !\n"); |
| 503 | return 1; |
| 504 | } |
| 505 | memcpy(addr, ranges + na, 4 * pna); |
| 506 | |
| 507 | finish: |
| 508 | of_dump_addr("OF: parent translation for:", addr, pna); |
| 509 | pr_debug("OF: with offset: %llx\n", (unsigned long long)offset); |
| 510 | |
| 511 | /* Translate it into parent bus space */ |
| 512 | return pbus->translate(addr, offset, pna); |
| 513 | } |
| 514 | |
| 515 | /* |
| 516 | * Translate an address from the device-tree into a CPU physical address, |
| 517 | * this walks up the tree and applies the various bus mappings on the |
| 518 | * way. |
| 519 | * |
| 520 | * Note: We consider that crossing any level with #size-cells == 0 to mean |
| 521 | * that translation is impossible (that is we are not dealing with a value |
| 522 | * that can be mapped to a cpu physical address). This is not really specified |
| 523 | * that way, but this is traditionally the way IBM at least do things |
| 524 | */ |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 525 | static u64 __of_translate_address(struct device_node *dev, |
| 526 | const __be32 *in_addr, const char *rprop) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 527 | { |
| 528 | struct device_node *parent = NULL; |
| 529 | struct of_bus *bus, *pbus; |
Kim Phillips | 47b1e68 | 2012-10-08 19:41:58 -0500 | [diff] [blame] | 530 | __be32 addr[OF_MAX_ADDR_CELLS]; |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 531 | int na, ns, pna, pns; |
| 532 | u64 result = OF_BAD_ADDR; |
| 533 | |
Grant Likely | 8804827 | 2013-09-19 11:01:52 -0500 | [diff] [blame] | 534 | pr_debug("OF: ** translation for device %s **\n", of_node_full_name(dev)); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 535 | |
| 536 | /* Increase refcount at current level */ |
| 537 | of_node_get(dev); |
| 538 | |
| 539 | /* Get parent & match bus type */ |
| 540 | parent = of_get_parent(dev); |
| 541 | if (parent == NULL) |
| 542 | goto bail; |
| 543 | bus = of_match_bus(parent); |
| 544 | |
Andrew Murray | 59f5ca4 | 2012-12-13 10:11:23 +0000 | [diff] [blame] | 545 | /* Count address cells & copy address locally */ |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 546 | bus->count_cells(dev, &na, &ns); |
| 547 | if (!OF_CHECK_COUNTS(na, ns)) { |
Rob Herring | d9c6866 | 2014-05-07 15:23:56 -0500 | [diff] [blame] | 548 | pr_debug("OF: Bad cell count for %s\n", of_node_full_name(dev)); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 549 | goto bail; |
| 550 | } |
| 551 | memcpy(addr, in_addr, na * 4); |
| 552 | |
| 553 | pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n", |
Grant Likely | 8804827 | 2013-09-19 11:01:52 -0500 | [diff] [blame] | 554 | bus->name, na, ns, of_node_full_name(parent)); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 555 | of_dump_addr("OF: translating address:", addr, na); |
| 556 | |
| 557 | /* Translate */ |
| 558 | for (;;) { |
| 559 | /* Switch to parent bus */ |
| 560 | of_node_put(dev); |
| 561 | dev = parent; |
| 562 | parent = of_get_parent(dev); |
| 563 | |
| 564 | /* If root, we have finished */ |
| 565 | if (parent == NULL) { |
| 566 | pr_debug("OF: reached root node\n"); |
| 567 | result = of_read_number(addr, na); |
| 568 | break; |
| 569 | } |
| 570 | |
| 571 | /* Get new parent bus and counts */ |
| 572 | pbus = of_match_bus(parent); |
| 573 | pbus->count_cells(dev, &pna, &pns); |
| 574 | if (!OF_CHECK_COUNTS(pna, pns)) { |
| 575 | printk(KERN_ERR "prom_parse: Bad cell count for %s\n", |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 576 | of_node_full_name(dev)); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 577 | break; |
| 578 | } |
| 579 | |
| 580 | pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 581 | pbus->name, pna, pns, of_node_full_name(parent)); |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 582 | |
| 583 | /* Apply bus translation */ |
| 584 | if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop)) |
| 585 | break; |
| 586 | |
| 587 | /* Complete the move up one level */ |
| 588 | na = pna; |
| 589 | ns = pns; |
| 590 | bus = pbus; |
| 591 | |
| 592 | of_dump_addr("OF: one level translation:", addr, na); |
| 593 | } |
| 594 | bail: |
| 595 | of_node_put(parent); |
| 596 | of_node_put(dev); |
| 597 | |
| 598 | return result; |
| 599 | } |
| 600 | |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 601 | u64 of_translate_address(struct device_node *dev, const __be32 *in_addr) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 602 | { |
| 603 | return __of_translate_address(dev, in_addr, "ranges"); |
| 604 | } |
| 605 | EXPORT_SYMBOL(of_translate_address); |
| 606 | |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 607 | u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 608 | { |
| 609 | return __of_translate_address(dev, in_addr, "dma-ranges"); |
| 610 | } |
| 611 | EXPORT_SYMBOL(of_translate_dma_address); |
| 612 | |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 613 | const __be32 *of_get_address(struct device_node *dev, int index, u64 *size, |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 614 | unsigned int *flags) |
| 615 | { |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 616 | const __be32 *prop; |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 617 | unsigned int psize; |
| 618 | struct device_node *parent; |
| 619 | struct of_bus *bus; |
| 620 | int onesize, i, na, ns; |
| 621 | |
| 622 | /* Get parent & match bus type */ |
| 623 | parent = of_get_parent(dev); |
| 624 | if (parent == NULL) |
| 625 | return NULL; |
| 626 | bus = of_match_bus(parent); |
| 627 | bus->count_cells(dev, &na, &ns); |
| 628 | of_node_put(parent); |
Stephen Warren | 5d61b16 | 2012-07-25 17:34:37 -0600 | [diff] [blame] | 629 | if (!OF_CHECK_ADDR_COUNT(na)) |
Grant Likely | dbbdee9 | 2010-06-08 07:48:10 -0600 | [diff] [blame] | 630 | return NULL; |
| 631 | |
| 632 | /* Get "reg" or "assigned-addresses" property */ |
| 633 | prop = of_get_property(dev, bus->addresses, &psize); |
| 634 | if (prop == NULL) |
| 635 | return NULL; |
| 636 | psize /= 4; |
| 637 | |
| 638 | onesize = na + ns; |
| 639 | for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) |
| 640 | if (i == index) { |
| 641 | if (size) |
| 642 | *size = of_read_number(prop + na, ns); |
| 643 | if (flags) |
| 644 | *flags = bus->get_flags(prop); |
| 645 | return prop; |
| 646 | } |
| 647 | return NULL; |
| 648 | } |
| 649 | EXPORT_SYMBOL(of_get_address); |
| 650 | |
Liviu Dudau | 41f8bba | 2014-09-29 15:29:21 +0100 | [diff] [blame] | 651 | #ifdef PCI_IOBASE |
| 652 | struct io_range { |
| 653 | struct list_head list; |
| 654 | phys_addr_t start; |
| 655 | resource_size_t size; |
| 656 | }; |
| 657 | |
| 658 | static LIST_HEAD(io_range_list); |
| 659 | static DEFINE_SPINLOCK(io_range_lock); |
| 660 | #endif |
| 661 | |
| 662 | /* |
| 663 | * Record the PCI IO range (expressed as CPU physical address + size). |
| 664 | * Return a negative value if an error has occured, zero otherwise |
| 665 | */ |
| 666 | int __weak pci_register_io_range(phys_addr_t addr, resource_size_t size) |
| 667 | { |
| 668 | int err = 0; |
| 669 | |
| 670 | #ifdef PCI_IOBASE |
| 671 | struct io_range *range; |
| 672 | resource_size_t allocated_size = 0; |
| 673 | |
| 674 | /* check if the range hasn't been previously recorded */ |
| 675 | spin_lock(&io_range_lock); |
| 676 | list_for_each_entry(range, &io_range_list, list) { |
| 677 | if (addr >= range->start && addr + size <= range->start + size) { |
| 678 | /* range already registered, bail out */ |
| 679 | goto end_register; |
| 680 | } |
| 681 | allocated_size += range->size; |
| 682 | } |
| 683 | |
| 684 | /* range not registed yet, check for available space */ |
| 685 | if (allocated_size + size - 1 > IO_SPACE_LIMIT) { |
| 686 | /* if it's too big check if 64K space can be reserved */ |
| 687 | if (allocated_size + SZ_64K - 1 > IO_SPACE_LIMIT) { |
| 688 | err = -E2BIG; |
| 689 | goto end_register; |
| 690 | } |
| 691 | |
| 692 | size = SZ_64K; |
| 693 | pr_warn("Requested IO range too big, new size set to 64K\n"); |
| 694 | } |
| 695 | |
| 696 | /* add the range to the list */ |
| 697 | range = kzalloc(sizeof(*range), GFP_KERNEL); |
| 698 | if (!range) { |
| 699 | err = -ENOMEM; |
| 700 | goto end_register; |
| 701 | } |
| 702 | |
| 703 | range->start = addr; |
| 704 | range->size = size; |
| 705 | |
| 706 | list_add_tail(&range->list, &io_range_list); |
| 707 | |
| 708 | end_register: |
| 709 | spin_unlock(&io_range_lock); |
| 710 | #endif |
| 711 | |
| 712 | return err; |
| 713 | } |
| 714 | |
| 715 | phys_addr_t pci_pio_to_address(unsigned long pio) |
| 716 | { |
| 717 | phys_addr_t address = (phys_addr_t)OF_BAD_ADDR; |
| 718 | |
| 719 | #ifdef PCI_IOBASE |
| 720 | struct io_range *range; |
| 721 | resource_size_t allocated_size = 0; |
| 722 | |
| 723 | if (pio > IO_SPACE_LIMIT) |
| 724 | return address; |
| 725 | |
| 726 | spin_lock(&io_range_lock); |
| 727 | list_for_each_entry(range, &io_range_list, list) { |
| 728 | if (pio >= allocated_size && pio < allocated_size + range->size) { |
| 729 | address = range->start + pio - allocated_size; |
| 730 | break; |
| 731 | } |
| 732 | allocated_size += range->size; |
| 733 | } |
| 734 | spin_unlock(&io_range_lock); |
| 735 | #endif |
| 736 | |
| 737 | return address; |
| 738 | } |
| 739 | |
Rob Herring | 25ff794 | 2013-09-07 14:07:11 -0500 | [diff] [blame] | 740 | unsigned long __weak pci_address_to_pio(phys_addr_t address) |
| 741 | { |
Liviu Dudau | 41f8bba | 2014-09-29 15:29:21 +0100 | [diff] [blame] | 742 | #ifdef PCI_IOBASE |
| 743 | struct io_range *res; |
| 744 | resource_size_t offset = 0; |
| 745 | unsigned long addr = -1; |
| 746 | |
| 747 | spin_lock(&io_range_lock); |
| 748 | list_for_each_entry(res, &io_range_list, list) { |
| 749 | if (address >= res->start && address < res->start + res->size) { |
| 750 | addr = res->start - address + offset; |
| 751 | break; |
| 752 | } |
| 753 | offset += res->size; |
| 754 | } |
| 755 | spin_unlock(&io_range_lock); |
| 756 | |
| 757 | return addr; |
| 758 | #else |
Rob Herring | 25ff794 | 2013-09-07 14:07:11 -0500 | [diff] [blame] | 759 | if (address > IO_SPACE_LIMIT) |
| 760 | return (unsigned long)-1; |
| 761 | |
| 762 | return (unsigned long) address; |
Liviu Dudau | 41f8bba | 2014-09-29 15:29:21 +0100 | [diff] [blame] | 763 | #endif |
Rob Herring | 25ff794 | 2013-09-07 14:07:11 -0500 | [diff] [blame] | 764 | } |
| 765 | |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 766 | static int __of_address_to_resource(struct device_node *dev, |
| 767 | const __be32 *addrp, u64 size, unsigned int flags, |
Benoit Cousson | 35f3da3 | 2011-12-05 15:23:55 +0100 | [diff] [blame] | 768 | const char *name, struct resource *r) |
Grant Likely | 1f5bef3 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 769 | { |
| 770 | u64 taddr; |
| 771 | |
| 772 | if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) |
| 773 | return -EINVAL; |
| 774 | taddr = of_translate_address(dev, addrp); |
| 775 | if (taddr == OF_BAD_ADDR) |
| 776 | return -EINVAL; |
| 777 | memset(r, 0, sizeof(struct resource)); |
| 778 | if (flags & IORESOURCE_IO) { |
| 779 | unsigned long port; |
| 780 | port = pci_address_to_pio(taddr); |
| 781 | if (port == (unsigned long)-1) |
| 782 | return -EINVAL; |
| 783 | r->start = port; |
| 784 | r->end = port + size - 1; |
| 785 | } else { |
| 786 | r->start = taddr; |
| 787 | r->end = taddr + size - 1; |
| 788 | } |
| 789 | r->flags = flags; |
Benoit Cousson | 35f3da3 | 2011-12-05 15:23:55 +0100 | [diff] [blame] | 790 | r->name = name ? name : dev->full_name; |
| 791 | |
Grant Likely | 1f5bef3 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | /** |
| 796 | * of_address_to_resource - Translate device tree address and return as resource |
| 797 | * |
| 798 | * Note that if your address is a PIO address, the conversion will fail if |
| 799 | * the physical address can't be internally converted to an IO token with |
| 800 | * pci_address_to_pio(), that is because it's either called to early or it |
| 801 | * can't be matched to any host bridge IO space |
| 802 | */ |
| 803 | int of_address_to_resource(struct device_node *dev, int index, |
| 804 | struct resource *r) |
| 805 | { |
Sebastian Andrzej Siewior | 0131d89 | 2010-12-01 10:54:46 +0100 | [diff] [blame] | 806 | const __be32 *addrp; |
Grant Likely | 1f5bef3 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 807 | u64 size; |
| 808 | unsigned int flags; |
Benoit Cousson | 35f3da3 | 2011-12-05 15:23:55 +0100 | [diff] [blame] | 809 | const char *name = NULL; |
Grant Likely | 1f5bef3 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 810 | |
| 811 | addrp = of_get_address(dev, index, &size, &flags); |
| 812 | if (addrp == NULL) |
| 813 | return -EINVAL; |
Benoit Cousson | 35f3da3 | 2011-12-05 15:23:55 +0100 | [diff] [blame] | 814 | |
| 815 | /* Get optional "reg-names" property to add a name to a resource */ |
| 816 | of_property_read_string_index(dev, "reg-names", index, &name); |
| 817 | |
| 818 | return __of_address_to_resource(dev, addrp, size, flags, name, r); |
Grant Likely | 1f5bef3 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 819 | } |
| 820 | EXPORT_SYMBOL_GPL(of_address_to_resource); |
| 821 | |
Grant Likely | 90e33f6 | 2011-07-05 23:42:28 -0600 | [diff] [blame] | 822 | struct device_node *of_find_matching_node_by_address(struct device_node *from, |
| 823 | const struct of_device_id *matches, |
| 824 | u64 base_address) |
| 825 | { |
| 826 | struct device_node *dn = of_find_matching_node(from, matches); |
| 827 | struct resource res; |
| 828 | |
| 829 | while (dn) { |
| 830 | if (of_address_to_resource(dn, 0, &res)) |
| 831 | continue; |
| 832 | if (res.start == base_address) |
| 833 | return dn; |
| 834 | dn = of_find_matching_node(dn, matches); |
| 835 | } |
| 836 | |
| 837 | return NULL; |
| 838 | } |
| 839 | |
Grant Likely | 1f5bef3 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 840 | |
Grant Likely | 6b884a8 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 841 | /** |
| 842 | * of_iomap - Maps the memory mapped IO for a given device_node |
| 843 | * @device: the device whose io range will be mapped |
| 844 | * @index: index of the io range |
| 845 | * |
| 846 | * Returns a pointer to the mapped memory |
| 847 | */ |
| 848 | void __iomem *of_iomap(struct device_node *np, int index) |
| 849 | { |
| 850 | struct resource res; |
| 851 | |
| 852 | if (of_address_to_resource(np, index, &res)) |
| 853 | return NULL; |
| 854 | |
Felipe Balbi | 28c1b6d | 2011-07-22 22:47:21 +0300 | [diff] [blame] | 855 | return ioremap(res.start, resource_size(&res)); |
Grant Likely | 6b884a8 | 2010-06-08 07:48:09 -0600 | [diff] [blame] | 856 | } |
| 857 | EXPORT_SYMBOL(of_iomap); |
Grygorii Strashko | 18308c9 | 2014-04-24 11:30:02 -0400 | [diff] [blame] | 858 | |
Matthias Brugger | efd342f | 2014-07-18 11:36:39 +0200 | [diff] [blame] | 859 | /* |
| 860 | * of_io_request_and_map - Requests a resource and maps the memory mapped IO |
| 861 | * for a given device_node |
| 862 | * @device: the device whose io range will be mapped |
| 863 | * @index: index of the io range |
| 864 | * @name: name of the resource |
| 865 | * |
| 866 | * Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded |
| 867 | * error code on failure. Usage example: |
| 868 | * |
| 869 | * base = of_io_request_and_map(node, 0, "foo"); |
| 870 | * if (IS_ERR(base)) |
| 871 | * return PTR_ERR(base); |
| 872 | */ |
| 873 | void __iomem *of_io_request_and_map(struct device_node *np, int index, |
Matthias Brugger | b75b276 | 2014-10-21 18:27:25 +0200 | [diff] [blame^] | 874 | const char *name) |
Matthias Brugger | efd342f | 2014-07-18 11:36:39 +0200 | [diff] [blame] | 875 | { |
| 876 | struct resource res; |
| 877 | void __iomem *mem; |
| 878 | |
| 879 | if (of_address_to_resource(np, index, &res)) |
| 880 | return IOMEM_ERR_PTR(-EINVAL); |
| 881 | |
| 882 | if (!request_mem_region(res.start, resource_size(&res), name)) |
| 883 | return IOMEM_ERR_PTR(-EBUSY); |
| 884 | |
| 885 | mem = ioremap(res.start, resource_size(&res)); |
| 886 | if (!mem) { |
| 887 | release_mem_region(res.start, resource_size(&res)); |
| 888 | return IOMEM_ERR_PTR(-ENOMEM); |
| 889 | } |
| 890 | |
| 891 | return mem; |
| 892 | } |
| 893 | EXPORT_SYMBOL(of_io_request_and_map); |
| 894 | |
Grygorii Strashko | 18308c9 | 2014-04-24 11:30:02 -0400 | [diff] [blame] | 895 | /** |
| 896 | * of_dma_get_range - Get DMA range info |
| 897 | * @np: device node to get DMA range info |
| 898 | * @dma_addr: pointer to store initial DMA address of DMA range |
| 899 | * @paddr: pointer to store initial CPU address of DMA range |
| 900 | * @size: pointer to store size of DMA range |
| 901 | * |
| 902 | * Look in bottom up direction for the first "dma-ranges" property |
| 903 | * and parse it. |
| 904 | * dma-ranges format: |
| 905 | * DMA addr (dma_addr) : naddr cells |
| 906 | * CPU addr (phys_addr_t) : pna cells |
| 907 | * size : nsize cells |
| 908 | * |
| 909 | * It returns -ENODEV if "dma-ranges" property was not found |
| 910 | * for this device in DT. |
| 911 | */ |
| 912 | int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *size) |
| 913 | { |
| 914 | struct device_node *node = of_node_get(np); |
| 915 | const __be32 *ranges = NULL; |
| 916 | int len, naddr, nsize, pna; |
| 917 | int ret = 0; |
| 918 | u64 dmaaddr; |
| 919 | |
| 920 | if (!node) |
| 921 | return -EINVAL; |
| 922 | |
| 923 | while (1) { |
| 924 | naddr = of_n_addr_cells(node); |
| 925 | nsize = of_n_size_cells(node); |
| 926 | node = of_get_next_parent(node); |
| 927 | if (!node) |
| 928 | break; |
| 929 | |
| 930 | ranges = of_get_property(node, "dma-ranges", &len); |
| 931 | |
| 932 | /* Ignore empty ranges, they imply no translation required */ |
| 933 | if (ranges && len > 0) |
| 934 | break; |
| 935 | |
| 936 | /* |
| 937 | * At least empty ranges has to be defined for parent node if |
| 938 | * DMA is supported |
| 939 | */ |
| 940 | if (!ranges) |
| 941 | break; |
| 942 | } |
| 943 | |
| 944 | if (!ranges) { |
| 945 | pr_debug("%s: no dma-ranges found for node(%s)\n", |
| 946 | __func__, np->full_name); |
| 947 | ret = -ENODEV; |
| 948 | goto out; |
| 949 | } |
| 950 | |
| 951 | len /= sizeof(u32); |
| 952 | |
| 953 | pna = of_n_addr_cells(node); |
| 954 | |
| 955 | /* dma-ranges format: |
| 956 | * DMA addr : naddr cells |
| 957 | * CPU addr : pna cells |
| 958 | * size : nsize cells |
| 959 | */ |
| 960 | dmaaddr = of_read_number(ranges, naddr); |
| 961 | *paddr = of_translate_dma_address(np, ranges); |
| 962 | if (*paddr == OF_BAD_ADDR) { |
| 963 | pr_err("%s: translation of DMA address(%pad) to CPU address failed node(%s)\n", |
| 964 | __func__, dma_addr, np->full_name); |
| 965 | ret = -EINVAL; |
| 966 | goto out; |
| 967 | } |
| 968 | *dma_addr = dmaaddr; |
| 969 | |
| 970 | *size = of_read_number(ranges + naddr + pna, nsize); |
| 971 | |
| 972 | pr_debug("dma_addr(%llx) cpu_addr(%llx) size(%llx)\n", |
| 973 | *dma_addr, *paddr, *size); |
| 974 | |
| 975 | out: |
| 976 | of_node_put(node); |
| 977 | |
| 978 | return ret; |
| 979 | } |
| 980 | EXPORT_SYMBOL_GPL(of_dma_get_range); |
Santosh Shilimkar | 92ea637 | 2014-04-24 11:30:03 -0400 | [diff] [blame] | 981 | |
| 982 | /** |
| 983 | * of_dma_is_coherent - Check if device is coherent |
| 984 | * @np: device node |
| 985 | * |
| 986 | * It returns true if "dma-coherent" property was found |
| 987 | * for this device in DT. |
| 988 | */ |
| 989 | bool of_dma_is_coherent(struct device_node *np) |
| 990 | { |
| 991 | struct device_node *node = of_node_get(np); |
| 992 | |
| 993 | while (node) { |
| 994 | if (of_property_read_bool(node, "dma-coherent")) { |
| 995 | of_node_put(node); |
| 996 | return true; |
| 997 | } |
| 998 | node = of_get_next_parent(node); |
| 999 | } |
| 1000 | of_node_put(node); |
| 1001 | return false; |
| 1002 | } |
Linus Torvalds | eb3d3ec | 2014-06-05 15:57:04 -0700 | [diff] [blame] | 1003 | EXPORT_SYMBOL_GPL(of_dma_is_coherent); |