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[PATCH] powerpc: cleanup of iSeries flat device tree
[usb.git] / arch / powerpc / platforms / iseries / dt.c
blobd3444aabe76e46bdda0cd6832cb56a480fe6095f
1 /*
2 * Copyright (c) 2005-2006 Michael Ellerman, IBM Corporation
3 *
4 * Description:
5 * This file contains all the routines to build a flattened device
6 * tree for a legacy iSeries machine.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
14 #undef DEBUG
15
16 #include <linux/types.h>
17 #include <linux/init.h>
18 #include <linux/pci.h>
19 #include <linux/pci_regs.h>
20 #include <linux/pci_ids.h>
21 #include <linux/threads.h>
22 #include <linux/bitops.h>
23 #include <linux/string.h>
24 #include <linux/kernel.h>
25 #include <linux/if_ether.h> /* ETH_ALEN */
26
27 #include <asm/machdep.h>
28 #include <asm/prom.h>
29 #include <asm/lppaca.h>
30 #include <asm/cputable.h>
31 #include <asm/abs_addr.h>
32 #include <asm/system.h>
33 #include <asm/iseries/hv_types.h>
34 #include <asm/iseries/hv_lp_config.h>
35 #include <asm/iseries/hv_call_xm.h>
36 #include <asm/iseries/it_exp_vpd_panel.h>
37 #include <asm/udbg.h>
38
39 #include "processor_vpd.h"
40 #include "call_hpt.h"
41 #include "call_pci.h"
42 #include "pci.h"
43
44 #ifdef DEBUG
45 #define DBG(fmt...) udbg_printf(fmt)
46 #else
47 #define DBG(fmt...)
48 #endif
49
50 /*
51 * These are created by the linker script at the start and end
52 * of the section containing all the strings from this file.
53 */
54 extern char __dt_strings_start[];
55 extern char __dt_strings_end[];
56
57 struct iseries_flat_dt {
58 struct boot_param_header header;
59 u64 reserve_map[2];
60 };
61
62 static void * __initdata dt_data;
63
64 /*
65 * Putting these strings here keeps them out of the section
66 * that we rename to .dt_strings using objcopy and capture
67 * for the strings blob of the flattened device tree.
68 */
69 static char __initdata device_type_cpu[] = "cpu";
70 static char __initdata device_type_memory[] = "memory";
71 static char __initdata device_type_serial[] = "serial";
72 static char __initdata device_type_network[] = "network";
73 static char __initdata device_type_block[] = "block";
74 static char __initdata device_type_byte[] = "byte";
75 static char __initdata device_type_pci[] = "pci";
76 static char __initdata device_type_vdevice[] = "vdevice";
77 static char __initdata device_type_vscsi[] = "vscsi";
78
79 static struct iseries_flat_dt * __init dt_init(void)
80 {
81 struct iseries_flat_dt *dt;
82 unsigned long str_len;
83
84 str_len = __dt_strings_end - __dt_strings_start;
85 dt = (struct iseries_flat_dt *)ALIGN(klimit, 8);
86 dt->header.off_mem_rsvmap =
87 offsetof(struct iseries_flat_dt, reserve_map);
88 dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
89 dt->header.off_dt_struct = dt->header.off_dt_strings
90 + ALIGN(str_len, 8);
91 dt_data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
92 dt->header.dt_strings_size = str_len;
93
94 /* There is no notion of hardware cpu id on iSeries */
95 dt->header.boot_cpuid_phys = smp_processor_id();
96
97 memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
98 str_len);
99
100 dt->header.magic = OF_DT_HEADER;
101 dt->header.version = 0x10;
102 dt->header.last_comp_version = 0x10;
103
104 dt->reserve_map[0] = 0;
105 dt->reserve_map[1] = 0;
106
107 return dt;
108 }
109
110 static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
111 {
112 *((u32 *)dt_data) = value;
113 dt_data += sizeof(u32);
114 }
115
116 #ifdef notyet
117 static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
118 {
119 *((u64 *)dt_data) = value;
120 dt_data += sizeof(u64);
121 }
122 #endif
123
124 static void __init dt_push_bytes(struct iseries_flat_dt *dt, const char *data,
125 int len)
126 {
127 memcpy(dt_data, data, len);
128 dt_data += ALIGN(len, 4);
129 }
130
131 static void __init dt_start_node(struct iseries_flat_dt *dt, const char *name)
132 {
133 dt_push_u32(dt, OF_DT_BEGIN_NODE);
134 dt_push_bytes(dt, name, strlen(name) + 1);
135 }
136
137 #define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
138
139 static void __init dt_prop(struct iseries_flat_dt *dt, const char *name,
140 const void *data, int len)
141 {
142 unsigned long offset;
143
144 dt_push_u32(dt, OF_DT_PROP);
145
146 /* Length of the data */
147 dt_push_u32(dt, len);
148
149 offset = name - __dt_strings_start;
150
151 /* The offset of the properties name in the string blob. */
152 dt_push_u32(dt, (u32)offset);
153
154 /* The actual data. */
155 dt_push_bytes(dt, data, len);
156 }
157
158 static void __init dt_prop_str(struct iseries_flat_dt *dt, const char *name,
159 const char *data)
160 {
161 dt_prop(dt, name, data, strlen(data) + 1); /* + 1 for NULL */
162 }
163
164 static void __init dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
165 u32 data)
166 {
167 dt_prop(dt, name, &data, sizeof(u32));
168 }
169
170 #ifdef notyet
171 static void __init dt_prop_u64(struct iseries_flat_dt *dt, const char *name,
172 u64 data)
173 {
174 dt_prop(dt, name, &data, sizeof(u64));
175 }
176 #endif
177
178 static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
179 const char *name, u64 *data, int n)
180 {
181 dt_prop(dt, name, data, sizeof(u64) * n);
182 }
183
184 static void __init dt_prop_u32_list(struct iseries_flat_dt *dt,
185 const char *name, u32 *data, int n)
186 {
187 dt_prop(dt, name, data, sizeof(u32) * n);
188 }
189
190 #ifdef notyet
191 static void __init dt_prop_empty(struct iseries_flat_dt *dt, const char *name)
192 {
193 dt_prop(dt, name, NULL, 0);
194 }
195 #endif
196
197 static void __init dt_cpus(struct iseries_flat_dt *dt)
198 {
199 unsigned char buf[32];
200 unsigned char *p;
201 unsigned int i, index;
202 struct IoHriProcessorVpd *d;
203 u32 pft_size[2];
204
205 /* yuck */
206 snprintf(buf, 32, "PowerPC,%s", cur_cpu_spec->cpu_name);
207 p = strchr(buf, ' ');
208 if (!p) p = buf + strlen(buf);
209
210 dt_start_node(dt, "cpus");
211 dt_prop_u32(dt, "#address-cells", 1);
212 dt_prop_u32(dt, "#size-cells", 0);
213
214 pft_size[0] = 0; /* NUMA CEC cookie, 0 for non NUMA */
215 pft_size[1] = __ilog2(HvCallHpt_getHptPages() * HW_PAGE_SIZE);
216
217 for (i = 0; i < NR_CPUS; i++) {
218 if (lppaca[i].dyn_proc_status >= 2)
219 continue;
220
221 snprintf(p, 32 - (p - buf), "@%d", i);
222 dt_start_node(dt, buf);
223
224 dt_prop_str(dt, "device_type", device_type_cpu);
225
226 index = lppaca[i].dyn_hv_phys_proc_index;
227 d = &xIoHriProcessorVpd[index];
228
229 dt_prop_u32(dt, "i-cache-size", d->xInstCacheSize * 1024);
230 dt_prop_u32(dt, "i-cache-line-size", d->xInstCacheOperandSize);
231
232 dt_prop_u32(dt, "d-cache-size", d->xDataL1CacheSizeKB * 1024);
233 dt_prop_u32(dt, "d-cache-line-size", d->xDataCacheOperandSize);
234
235 /* magic conversions to Hz copied from old code */
236 dt_prop_u32(dt, "clock-frequency",
237 ((1UL << 34) * 1000000) / d->xProcFreq);
238 dt_prop_u32(dt, "timebase-frequency",
239 ((1UL << 32) * 1000000) / d->xTimeBaseFreq);
240
241 dt_prop_u32(dt, "reg", i);
242
243 dt_prop_u32_list(dt, "ibm,pft-size", pft_size, 2);
244
245 dt_end_node(dt);
246 }
247
248 dt_end_node(dt);
249 }
250
251 static void __init dt_model(struct iseries_flat_dt *dt)
252 {
253 char buf[16] = "IBM,";
254
255 /* "IBM," + mfgId[2:3] + systemSerial[1:5] */
256 strne2a(buf + 4, xItExtVpdPanel.mfgID + 2, 2);
257 strne2a(buf + 6, xItExtVpdPanel.systemSerial + 1, 5);
258 buf[11] = '\0';
259 dt_prop_str(dt, "system-id", buf);
260
261 /* "IBM," + machineType[0:4] */
262 strne2a(buf + 4, xItExtVpdPanel.machineType, 4);
263 buf[8] = '\0';
264 dt_prop_str(dt, "model", buf);
265
266 dt_prop_str(dt, "compatible", "IBM,iSeries");
267 }
268
269 static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
270 const char *name, u32 reg, int unit,
271 const char *type, const char *compat, int end)
272 {
273 char buf[32];
274
275 snprintf(buf, 32, "%s@%08x", name, reg + ((unit >= 0) ? unit : 0));
276 dt_start_node(dt, buf);
277 dt_prop_str(dt, "device_type", type);
278 if (compat)
279 dt_prop_str(dt, "compatible", compat);
280 dt_prop_u32(dt, "reg", reg + ((unit >= 0) ? unit : 0));
281 if (unit >= 0)
282 dt_prop_u32(dt, "linux,unit_address", unit);
283 if (end)
284 dt_end_node(dt);
285 }
286
287 static void __init dt_vdevices(struct iseries_flat_dt *dt)
288 {
289 u32 reg = 0;
290 HvLpIndexMap vlan_map;
291 int i;
292
293 dt_start_node(dt, "vdevice");
294 dt_prop_str(dt, "device_type", device_type_vdevice);
295 dt_prop_str(dt, "compatible", "IBM,iSeries-vdevice");
296 dt_prop_u32(dt, "#address-cells", 1);
297 dt_prop_u32(dt, "#size-cells", 0);
298
299 dt_do_vdevice(dt, "vty", reg, -1, device_type_serial, NULL, 1);
300 reg++;
301
302 dt_do_vdevice(dt, "v-scsi", reg, -1, device_type_vscsi,
303 "IBM,v-scsi", 1);
304 reg++;
305
306 vlan_map = HvLpConfig_getVirtualLanIndexMap();
307 for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
308 unsigned char mac_addr[ETH_ALEN];
309
310 if ((vlan_map & (0x8000 >> i)) == 0)
311 continue;
312 dt_do_vdevice(dt, "l-lan", reg, i, device_type_network,
313 "IBM,iSeries-l-lan", 0);
314 mac_addr[0] = 0x02;
315 mac_addr[1] = 0x01;
316 mac_addr[2] = 0xff;
317 mac_addr[3] = i;
318 mac_addr[4] = 0xff;
319 mac_addr[5] = HvLpConfig_getLpIndex_outline();
320 dt_prop(dt, "local-mac-address", (char *)mac_addr, ETH_ALEN);
321 dt_prop(dt, "mac-address", (char *)mac_addr, ETH_ALEN);
322 dt_prop_u32(dt, "max-frame-size", 9000);
323 dt_prop_u32(dt, "address-bits", 48);
324
325 dt_end_node(dt);
326 }
327 reg += HVMAXARCHITECTEDVIRTUALLANS;
328
329 for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
330 dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
331 "IBM,iSeries-viodasd", 1);
332 reg += HVMAXARCHITECTEDVIRTUALDISKS;
333
334 for (i = 0; i < HVMAXARCHITECTEDVIRTUALCDROMS; i++)
335 dt_do_vdevice(dt, "viocd", reg, i, device_type_block,
336 "IBM,iSeries-viocd", 1);
337 reg += HVMAXARCHITECTEDVIRTUALCDROMS;
338
339 for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
340 dt_do_vdevice(dt, "viotape", reg, i, device_type_byte,
341 "IBM,iSeries-viotape", 1);
342
343 dt_end_node(dt);
344 }
345
346 struct pci_class_name {
347 u16 code;
348 const char *name;
349 const char *type;
350 };
351
352 static struct pci_class_name __initdata pci_class_name[] = {
353 { PCI_CLASS_NETWORK_ETHERNET, "ethernet", device_type_network },
354 };
355
356 static struct pci_class_name * __init dt_find_pci_class_name(u16 class_code)
357 {
358 struct pci_class_name *cp;
359
360 for (cp = pci_class_name;
361 cp < &pci_class_name[ARRAY_SIZE(pci_class_name)]; cp++)
362 if (cp->code == class_code)
363 return cp;
364 return NULL;
365 }
366
367 /*
368 * This assumes that the node slot is always on the primary bus!
369 */
370 static void __init scan_bridge_slot(struct iseries_flat_dt *dt,
371 HvBusNumber bus, struct HvCallPci_BridgeInfo *bridge_info)
372 {
373 HvSubBusNumber sub_bus = bridge_info->subBusNumber;
374 u16 vendor_id;
375 u16 device_id;
376 u32 class_id;
377 int err;
378 char buf[32];
379 u32 reg[5];
380 int id_sel = ISERIES_GET_DEVICE_FROM_SUBBUS(sub_bus);
381 int function = ISERIES_GET_FUNCTION_FROM_SUBBUS(sub_bus);
382 HvAgentId eads_id_sel = ISERIES_PCI_AGENTID(id_sel, function);
383 u8 devfn;
384 struct pci_class_name *cp;
385
386 /*
387 * Connect all functions of any device found.
388 */
389 for (id_sel = 1; id_sel <= bridge_info->maxAgents; id_sel++) {
390 for (function = 0; function < 8; function++) {
391 HvAgentId agent_id = ISERIES_PCI_AGENTID(id_sel,
392 function);
393 err = HvCallXm_connectBusUnit(bus, sub_bus,
394 agent_id, 0);
395 if (err) {
396 if (err != 0x302)
397 DBG("connectBusUnit(%x, %x, %x) %x\n",
398 bus, sub_bus, agent_id, err);
399 continue;
400 }
401
402 err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
403 PCI_VENDOR_ID, &vendor_id);
404 if (err) {
405 DBG("ReadVendor(%x, %x, %x) %x\n",
406 bus, sub_bus, agent_id, err);
407 continue;
408 }
409 err = HvCallPci_configLoad16(bus, sub_bus, agent_id,
410 PCI_DEVICE_ID, &device_id);
411 if (err) {
412 DBG("ReadDevice(%x, %x, %x) %x\n",
413 bus, sub_bus, agent_id, err);
414 continue;
415 }
416 err = HvCallPci_configLoad32(bus, sub_bus, agent_id,
417 PCI_CLASS_REVISION , &class_id);
418 if (err) {
419 DBG("ReadClass(%x, %x, %x) %x\n",
420 bus, sub_bus, agent_id, err);
421 continue;
422 }
423
424 devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(eads_id_sel),
425 function);
426 cp = dt_find_pci_class_name(class_id >> 16);
427 if (cp && cp->name)
428 strncpy(buf, cp->name, sizeof(buf) - 1);
429 else
430 snprintf(buf, sizeof(buf), "pci%x,%x",
431 vendor_id, device_id);
432 buf[sizeof(buf) - 1] = '\0';
433 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
434 "@%x", PCI_SLOT(devfn));
435 buf[sizeof(buf) - 1] = '\0';
436 if (function != 0)
437 snprintf(buf + strlen(buf),
438 sizeof(buf) - strlen(buf),
439 ",%x", function);
440 dt_start_node(dt, buf);
441 reg[0] = (bus << 16) | (devfn << 8);
442 reg[1] = 0;
443 reg[2] = 0;
444 reg[3] = 0;
445 reg[4] = 0;
446 dt_prop_u32_list(dt, "reg", reg, 5);
447 if (cp && (cp->type || cp->name))
448 dt_prop_str(dt, "device_type",
449 cp->type ? cp->type : cp->name);
450 dt_prop_u32(dt, "vendor-id", vendor_id);
451 dt_prop_u32(dt, "device-id", device_id);
452 dt_prop_u32(dt, "class-code", class_id >> 8);
453 dt_prop_u32(dt, "revision-id", class_id & 0xff);
454 dt_prop_u32(dt, "linux,subbus", sub_bus);
455 dt_prop_u32(dt, "linux,agent-id", agent_id);
456 dt_prop_u32(dt, "linux,logical-slot-number",
457 bridge_info->logicalSlotNumber);
458 dt_end_node(dt);
459
460 }
461 }
462 }
463
464 static void __init scan_bridge(struct iseries_flat_dt *dt, HvBusNumber bus,
465 HvSubBusNumber sub_bus, int id_sel)
466 {
467 struct HvCallPci_BridgeInfo bridge_info;
468 HvAgentId agent_id;
469 int function;
470 int ret;
471
472 /* Note: hvSubBus and irq is always be 0 at this level! */
473 for (function = 0; function < 8; ++function) {
474 agent_id = ISERIES_PCI_AGENTID(id_sel, function);
475 ret = HvCallXm_connectBusUnit(bus, sub_bus, agent_id, 0);
476 if (ret != 0) {
477 if (ret != 0xb)
478 DBG("connectBusUnit(%x, %x, %x) %x\n",
479 bus, sub_bus, agent_id, ret);
480 continue;
481 }
482 DBG("found device at bus %d idsel %d func %d (AgentId %x)\n",
483 bus, id_sel, function, agent_id);
484 ret = HvCallPci_getBusUnitInfo(bus, sub_bus, agent_id,
485 iseries_hv_addr(&bridge_info),
486 sizeof(struct HvCallPci_BridgeInfo));
487 if (ret != 0)
488 continue;
489 DBG("bridge info: type %x subbus %x "
490 "maxAgents %x maxsubbus %x logslot %x\n",
491 bridge_info.busUnitInfo.deviceType,
492 bridge_info.subBusNumber,
493 bridge_info.maxAgents,
494 bridge_info.maxSubBusNumber,
495 bridge_info.logicalSlotNumber);
496 if (bridge_info.busUnitInfo.deviceType ==
497 HvCallPci_BridgeDevice)
498 scan_bridge_slot(dt, bus, &bridge_info);
499 else
500 DBG("PCI: Invalid Bridge Configuration(0x%02X)",
501 bridge_info.busUnitInfo.deviceType);
502 }
503 }
504
505 static void __init scan_phb(struct iseries_flat_dt *dt, HvBusNumber bus)
506 {
507 struct HvCallPci_DeviceInfo dev_info;
508 const HvSubBusNumber sub_bus = 0; /* EADs is always 0. */
509 int err;
510 int id_sel;
511 const int max_agents = 8;
512
513 /*
514 * Probe for EADs Bridges
515 */
516 for (id_sel = 1; id_sel < max_agents; ++id_sel) {
517 err = HvCallPci_getDeviceInfo(bus, sub_bus, id_sel,
518 iseries_hv_addr(&dev_info),
519 sizeof(struct HvCallPci_DeviceInfo));
520 if (err) {
521 if (err != 0x302)
522 DBG("getDeviceInfo(%x, %x, %x) %x\n",
523 bus, sub_bus, id_sel, err);
524 continue;
525 }
526 if (dev_info.deviceType != HvCallPci_NodeDevice) {
527 DBG("PCI: Invalid System Configuration"
528 "(0x%02X) for bus 0x%02x id 0x%02x.\n",
529 dev_info.deviceType, bus, id_sel);
530 continue;
531 }
532 scan_bridge(dt, bus, sub_bus, id_sel);
533 }
534 }
535
536 static void __init dt_pci_devices(struct iseries_flat_dt *dt)
537 {
538 HvBusNumber bus;
539 char buf[32];
540 u32 buses[2];
541 int phb_num = 0;
542
543 /* Check all possible buses. */
544 for (bus = 0; bus < 256; bus++) {
545 int err = HvCallXm_testBus(bus);
546
547 if (err) {
548 /*
549 * Check for Unexpected Return code, a clue that
550 * something has gone wrong.
551 */
552 if (err != 0x0301)
553 DBG("Unexpected Return on Probe(0x%02X) "
554 "0x%04X\n", bus, err);
555 continue;
556 }
557 DBG("bus %d appears to exist\n", bus);
558 snprintf(buf, 32, "pci@%d", phb_num);
559 dt_start_node(dt, buf);
560 dt_prop_str(dt, "device_type", device_type_pci);
561 dt_prop_str(dt, "compatible", "IBM,iSeries-Logical-PHB");
562 dt_prop_u32(dt, "#address-cells", 3);
563 dt_prop_u32(dt, "#size-cells", 2);
564 buses[0] = buses[1] = bus;
565 dt_prop_u32_list(dt, "bus-range", buses, 2);
566 scan_phb(dt, bus);
567 dt_end_node(dt);
568 phb_num++;
569 }
570 }
571
572 static void dt_finish(struct iseries_flat_dt *dt)
573 {
574 dt_push_u32(dt, OF_DT_END);
575 dt->header.totalsize = (unsigned long)dt_data - (unsigned long)dt;
576 klimit = ALIGN((unsigned long)dt_data, 8);
577 }
578
579 void * __init build_flat_dt(unsigned long phys_mem_size)
580 {
581 struct iseries_flat_dt *iseries_dt;
582 u64 tmp[2];
583
584 iseries_dt = dt_init();
585
586 dt_start_node(iseries_dt, "");
587
588 dt_prop_u32(iseries_dt, "#address-cells", 2);
589 dt_prop_u32(iseries_dt, "#size-cells", 2);
590 dt_model(iseries_dt);
591
592 /* /memory */
593 dt_start_node(iseries_dt, "memory@0");
594 dt_prop_str(iseries_dt, "device_type", device_type_memory);
595 tmp[0] = 0;
596 tmp[1] = phys_mem_size;
597 dt_prop_u64_list(iseries_dt, "reg", tmp, 2);
598 dt_end_node(iseries_dt);
599
600 /* /chosen */
601 dt_start_node(iseries_dt, "chosen");
602 dt_prop_str(iseries_dt, "bootargs", cmd_line);
603 dt_end_node(iseries_dt);
604
605 dt_cpus(iseries_dt);
606
607 dt_vdevices(iseries_dt);
608 dt_pci_devices(iseries_dt);
609
610 dt_end_node(iseries_dt);
611
612 dt_finish(iseries_dt);
613
614 return iseries_dt;
615 }
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