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1/*
2 * Broadcom specific AMBA
3 * Bus scanning
4 *
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
7
8#include "scan.h"
9#include "bcma_private.h"
10
11#include <linux/bcma/bcma.h>
12#include <linux/bcma/bcma_regs.h>
13#include <linux/pci.h>
14#include <linux/io.h>
15#include <linux/dma-mapping.h>
16#include <linux/slab.h>
17
18struct bcma_device_id_name {
19 u16 id;
20 const char *name;
21};
22
23static const struct bcma_device_id_name bcma_arm_device_names[] = {
24 { BCMA_CORE_4706_MAC_GBIT_COMMON, "BCM4706 GBit MAC Common" },
25 { BCMA_CORE_ARM_1176, "ARM 1176" },
26 { BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
27 { BCMA_CORE_ARM_CM3, "ARM CM3" },
28};
29
30static const struct bcma_device_id_name bcma_bcm_device_names[] = {
31 { BCMA_CORE_OOB_ROUTER, "OOB Router" },
32 { BCMA_CORE_4706_CHIPCOMMON, "BCM4706 ChipCommon" },
33 { BCMA_CORE_4706_SOC_RAM, "BCM4706 SOC RAM" },
34 { BCMA_CORE_4706_MAC_GBIT, "BCM4706 GBit MAC" },
35 { BCMA_CORE_NS_PCIEG2, "PCIe Gen 2" },
36 { BCMA_CORE_NS_DMA, "DMA" },
37 { BCMA_CORE_NS_SDIO3, "SDIO3" },
38 { BCMA_CORE_NS_USB20, "USB 2.0" },
39 { BCMA_CORE_NS_USB30, "USB 3.0" },
40 { BCMA_CORE_NS_A9JTAG, "ARM Cortex A9 JTAG" },
41 { BCMA_CORE_NS_DDR23, "Denali DDR2/DDR3 memory controller" },
42 { BCMA_CORE_NS_ROM, "ROM" },
43 { BCMA_CORE_NS_NAND, "NAND flash controller" },
44 { BCMA_CORE_NS_QSPI, "SPI flash controller" },
45 { BCMA_CORE_NS_CHIPCOMMON_B, "Chipcommon B" },
46 { BCMA_CORE_ARMCA9, "ARM Cortex A9 core (ihost)" },
47 { BCMA_CORE_AMEMC, "AMEMC (DDR)" },
48 { BCMA_CORE_ALTA, "ALTA (I2S)" },
49 { BCMA_CORE_INVALID, "Invalid" },
50 { BCMA_CORE_CHIPCOMMON, "ChipCommon" },
51 { BCMA_CORE_ILINE20, "ILine 20" },
52 { BCMA_CORE_SRAM, "SRAM" },
53 { BCMA_CORE_SDRAM, "SDRAM" },
54 { BCMA_CORE_PCI, "PCI" },
55 { BCMA_CORE_ETHERNET, "Fast Ethernet" },
56 { BCMA_CORE_V90, "V90" },
57 { BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
58 { BCMA_CORE_ADSL, "ADSL" },
59 { BCMA_CORE_ILINE100, "ILine 100" },
60 { BCMA_CORE_IPSEC, "IPSEC" },
61 { BCMA_CORE_UTOPIA, "UTOPIA" },
62 { BCMA_CORE_PCMCIA, "PCMCIA" },
63 { BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
64 { BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
65 { BCMA_CORE_OFDM, "OFDM" },
66 { BCMA_CORE_EXTIF, "EXTIF" },
67 { BCMA_CORE_80211, "IEEE 802.11" },
68 { BCMA_CORE_PHY_A, "PHY A" },
69 { BCMA_CORE_PHY_B, "PHY B" },
70 { BCMA_CORE_PHY_G, "PHY G" },
71 { BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
72 { BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
73 { BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
74 { BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
75 { BCMA_CORE_SDIO_HOST, "SDIO Host" },
76 { BCMA_CORE_ROBOSWITCH, "Roboswitch" },
77 { BCMA_CORE_PARA_ATA, "PATA" },
78 { BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
79 { BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
80 { BCMA_CORE_PCIE, "PCIe" },
81 { BCMA_CORE_PHY_N, "PHY N" },
82 { BCMA_CORE_SRAM_CTL, "SRAM Controller" },
83 { BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
84 { BCMA_CORE_PHY_LP, "PHY LP" },
85 { BCMA_CORE_PMU, "PMU" },
86 { BCMA_CORE_PHY_SSN, "PHY SSN" },
87 { BCMA_CORE_SDIO_DEV, "SDIO Device" },
88 { BCMA_CORE_PHY_HT, "PHY HT" },
89 { BCMA_CORE_MAC_GBIT, "GBit MAC" },
90 { BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
91 { BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
92 { BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
93 { BCMA_CORE_SHARED_COMMON, "Common Shared" },
94 { BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
95 { BCMA_CORE_SPI_HOST, "SPI Host" },
96 { BCMA_CORE_I2S, "I2S" },
97 { BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
98 { BCMA_CORE_SHIM, "SHIM" },
99 { BCMA_CORE_PCIE2, "PCIe Gen2" },
100 { BCMA_CORE_ARM_CR4, "ARM CR4" },
101 { BCMA_CORE_GCI, "GCI" },
102 { BCMA_CORE_CMEM, "CNDS DDR2/3 memory controller" },
103 { BCMA_CORE_ARM_CA7, "ARM CA7" },
104 { BCMA_CORE_DEFAULT, "Default" },
105};
106
107static const struct bcma_device_id_name bcma_mips_device_names[] = {
108 { BCMA_CORE_MIPS, "MIPS" },
109 { BCMA_CORE_MIPS_3302, "MIPS 3302" },
110 { BCMA_CORE_MIPS_74K, "MIPS 74K" },
111};
112
113static const char *bcma_device_name(const struct bcma_device_id *id)
114{
115 const struct bcma_device_id_name *names;
116 int size, i;
117
118 /* search manufacturer specific names */
119 switch (id->manuf) {
120 case BCMA_MANUF_ARM:
121 names = bcma_arm_device_names;
122 size = ARRAY_SIZE(bcma_arm_device_names);
123 break;
124 case BCMA_MANUF_BCM:
125 names = bcma_bcm_device_names;
126 size = ARRAY_SIZE(bcma_bcm_device_names);
127 break;
128 case BCMA_MANUF_MIPS:
129 names = bcma_mips_device_names;
130 size = ARRAY_SIZE(bcma_mips_device_names);
131 break;
132 default:
133 return "UNKNOWN";
134 }
135
136 for (i = 0; i < size; i++) {
137 if (names[i].id == id->id)
138 return names[i].name;
139 }
140
141 return "UNKNOWN";
142}
143
144static u32 bcma_scan_read32(struct bcma_bus *bus, u16 offset)
145{
146 return readl(bus->mmio + offset);
147}
148
149static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
150{
151 if (bus->hosttype == BCMA_HOSTTYPE_PCI)
152 pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
153 addr);
154}
155
156static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 __iomem **eromptr)
157{
158 u32 ent = readl(*eromptr);
159 (*eromptr)++;
160 return ent;
161}
162
163static void bcma_erom_push_ent(u32 __iomem **eromptr)
164{
165 (*eromptr)--;
166}
167
168static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 __iomem **eromptr)
169{
170 u32 ent = bcma_erom_get_ent(bus, eromptr);
171 if (!(ent & SCAN_ER_VALID))
172 return -ENOENT;
173 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
174 return -ENOENT;
175 return ent;
176}
177
178static bool bcma_erom_is_end(struct bcma_bus *bus, u32 __iomem **eromptr)
179{
180 u32 ent = bcma_erom_get_ent(bus, eromptr);
181 bcma_erom_push_ent(eromptr);
182 return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
183}
184
185static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 __iomem **eromptr)
186{
187 u32 ent = bcma_erom_get_ent(bus, eromptr);
188 bcma_erom_push_ent(eromptr);
189 return (((ent & SCAN_ER_VALID)) &&
190 ((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
191 ((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
192}
193
194static void bcma_erom_skip_component(struct bcma_bus *bus, u32 __iomem **eromptr)
195{
196 u32 ent;
197 while (1) {
198 ent = bcma_erom_get_ent(bus, eromptr);
199 if ((ent & SCAN_ER_VALID) &&
200 ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
201 break;
202 if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
203 break;
204 }
205 bcma_erom_push_ent(eromptr);
206}
207
208static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 __iomem **eromptr)
209{
210 u32 ent = bcma_erom_get_ent(bus, eromptr);
211 if (!(ent & SCAN_ER_VALID))
212 return -ENOENT;
213 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
214 return -ENOENT;
215 return ent;
216}
217
218static u32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 __iomem **eromptr,
219 u32 type, u8 port)
220{
221 u32 addrl;
222 u32 size;
223
224 u32 ent = bcma_erom_get_ent(bus, eromptr);
225 if ((!(ent & SCAN_ER_VALID)) ||
226 ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
227 ((ent & SCAN_ADDR_TYPE) != type) ||
228 (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
229 bcma_erom_push_ent(eromptr);
230 return (u32)-EINVAL;
231 }
232
233 addrl = ent & SCAN_ADDR_ADDR;
234 if (ent & SCAN_ADDR_AG32)
235 bcma_erom_get_ent(bus, eromptr);
236
237 if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
238 size = bcma_erom_get_ent(bus, eromptr);
239 if (size & SCAN_SIZE_SG32)
240 bcma_erom_get_ent(bus, eromptr);
241 }
242
243 return addrl;
244}
245
246static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
247 u16 index)
248{
249 struct bcma_device *core;
250
251 list_for_each_entry(core, &bus->cores, list) {
252 if (core->core_index == index)
253 return core;
254 }
255 return NULL;
256}
257
258static struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid)
259{
260 struct bcma_device *core;
261
262 list_for_each_entry_reverse(core, &bus->cores, list) {
263 if (core->id.id == coreid)
264 return core;
265 }
266 return NULL;
267}
268
269#define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO)
270
271static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
272 struct bcma_device_id *match, int core_num,
273 struct bcma_device *core)
274{
275 u32 tmp;
276 u8 i, j, k;
277 s32 cia, cib;
278 u8 ports[2], wrappers[2];
279
280 /* get CIs */
281 cia = bcma_erom_get_ci(bus, eromptr);
282 if (cia < 0) {
283 bcma_erom_push_ent(eromptr);
284 if (bcma_erom_is_end(bus, eromptr))
285 return -ESPIPE;
286 return -EILSEQ;
287 }
288 cib = bcma_erom_get_ci(bus, eromptr);
289 if (cib < 0)
290 return -EILSEQ;
291
292 /* parse CIs */
293 core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
294 core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
295 core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
296 ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
297 ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
298 wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
299 wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
300 core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;
301
302 if (((core->id.manuf == BCMA_MANUF_ARM) &&
303 (core->id.id == 0xFFF)) ||
304 (ports[1] == 0)) {
305 bcma_erom_skip_component(bus, eromptr);
306 return -ENXIO;
307 }
308
309 /* check if component is a core at all */
310 if (wrappers[0] + wrappers[1] == 0) {
311 /* Some specific cores don't need wrappers */
312 switch (core->id.id) {
313 case BCMA_CORE_4706_MAC_GBIT_COMMON:
314 case BCMA_CORE_NS_CHIPCOMMON_B:
315 case BCMA_CORE_PMU:
316 case BCMA_CORE_GCI:
317 /* Not used yet: case BCMA_CORE_OOB_ROUTER: */
318 break;
319 default:
320 bcma_erom_skip_component(bus, eromptr);
321 return -ENXIO;
322 }
323 }
324
325 if (bcma_erom_is_bridge(bus, eromptr)) {
326 bcma_erom_skip_component(bus, eromptr);
327 return -ENXIO;
328 }
329
330 if (bcma_find_core_by_index(bus, core_num)) {
331 bcma_erom_skip_component(bus, eromptr);
332 return -ENODEV;
333 }
334
335 if (match && ((match->manuf != BCMA_ANY_MANUF &&
336 match->manuf != core->id.manuf) ||
337 (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
338 (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
339 (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
340 )) {
341 bcma_erom_skip_component(bus, eromptr);
342 return -ENODEV;
343 }
344
345 /* get & parse master ports */
346 for (i = 0; i < ports[0]; i++) {
347 s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
348 if (mst_port_d < 0)
349 return -EILSEQ;
350 }
351
352 /* First Slave Address Descriptor should be port 0:
353 * the main register space for the core
354 */
355 tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
356 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
357 /* Try again to see if it is a bridge */
358 tmp = bcma_erom_get_addr_desc(bus, eromptr,
359 SCAN_ADDR_TYPE_BRIDGE, 0);
360 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
361 return -EILSEQ;
362 } else {
363 bcma_info(bus, "Bridge found\n");
364 return -ENXIO;
365 }
366 }
367 core->addr = tmp;
368
369 /* get & parse slave ports */
370 k = 0;
371 for (i = 0; i < ports[1]; i++) {
372 for (j = 0; ; j++) {
373 tmp = bcma_erom_get_addr_desc(bus, eromptr,
374 SCAN_ADDR_TYPE_SLAVE, i);
375 if (IS_ERR_VALUE_U32(tmp)) {
376 /* no more entries for port _i_ */
377 /* pr_debug("erom: slave port %d "
378 * "has %d descriptors\n", i, j); */
379 break;
380 } else if (k < ARRAY_SIZE(core->addr_s)) {
381 core->addr_s[k] = tmp;
382 k++;
383 }
384 }
385 }
386
387 /* get & parse master wrappers */
388 for (i = 0; i < wrappers[0]; i++) {
389 for (j = 0; ; j++) {
390 tmp = bcma_erom_get_addr_desc(bus, eromptr,
391 SCAN_ADDR_TYPE_MWRAP, i);
392 if (IS_ERR_VALUE_U32(tmp)) {
393 /* no more entries for port _i_ */
394 /* pr_debug("erom: master wrapper %d "
395 * "has %d descriptors\n", i, j); */
396 break;
397 } else {
398 if (i == 0 && j == 0)
399 core->wrap = tmp;
400 }
401 }
402 }
403
404 /* get & parse slave wrappers */
405 for (i = 0; i < wrappers[1]; i++) {
406 u8 hack = (ports[1] == 1) ? 0 : 1;
407 for (j = 0; ; j++) {
408 tmp = bcma_erom_get_addr_desc(bus, eromptr,
409 SCAN_ADDR_TYPE_SWRAP, i + hack);
410 if (IS_ERR_VALUE_U32(tmp)) {
411 /* no more entries for port _i_ */
412 /* pr_debug("erom: master wrapper %d "
413 * has %d descriptors\n", i, j); */
414 break;
415 } else {
416 if (wrappers[0] == 0 && !i && !j)
417 core->wrap = tmp;
418 }
419 }
420 }
421 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
422 core->io_addr = ioremap(core->addr, BCMA_CORE_SIZE);
423 if (!core->io_addr)
424 return -ENOMEM;
425 if (core->wrap) {
426 core->io_wrap = ioremap(core->wrap,
427 BCMA_CORE_SIZE);
428 if (!core->io_wrap) {
429 iounmap(core->io_addr);
430 return -ENOMEM;
431 }
432 }
433 }
434 return 0;
435}
436
437void bcma_detect_chip(struct bcma_bus *bus)
438{
439 s32 tmp;
440 struct bcma_chipinfo *chipinfo = &(bus->chipinfo);
441 char chip_id[8];
442
443 bcma_scan_switch_core(bus, BCMA_ADDR_BASE);
444
445 tmp = bcma_scan_read32(bus, BCMA_CC_ID);
446 chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
447 chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
448 chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
449
450 snprintf(chip_id, ARRAY_SIZE(chip_id),
451 (chipinfo->id > 0x9999) ? "%d" : "0x%04X", chipinfo->id);
452 bcma_info(bus, "Found chip with id %s, rev 0x%02X and package 0x%02X\n",
453 chip_id, chipinfo->rev, chipinfo->pkg);
454}
455
456int bcma_bus_scan(struct bcma_bus *bus)
457{
458 u32 erombase;
459 u32 __iomem *eromptr, *eromend;
460
461 int err, core_num = 0;
462
463 /* Skip if bus was already scanned (e.g. during early register) */
464 if (bus->nr_cores)
465 return 0;
466
467 erombase = bcma_scan_read32(bus, BCMA_CC_EROM);
468 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
469 eromptr = ioremap(erombase, BCMA_CORE_SIZE);
470 if (!eromptr)
471 return -ENOMEM;
472 } else {
473 eromptr = bus->mmio;
474 }
475
476 eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
477
478 bcma_scan_switch_core(bus, erombase);
479
480 while (eromptr < eromend) {
481 struct bcma_device *other_core;
482 struct bcma_device *core = kzalloc_obj(*core);
483 if (!core) {
484 err = -ENOMEM;
485 goto out;
486 }
487 INIT_LIST_HEAD(&core->list);
488 core->bus = bus;
489
490 err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
491 if (err < 0) {
492 kfree(core);
493 if (err == -ENODEV) {
494 core_num++;
495 continue;
496 } else if (err == -ENXIO) {
497 continue;
498 } else if (err == -ESPIPE) {
499 break;
500 }
501 goto out;
502 }
503
504 core->core_index = core_num++;
505 bus->nr_cores++;
506 other_core = bcma_find_core_reverse(bus, core->id.id);
507 core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1;
508 bcma_prepare_core(bus, core);
509
510 bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
511 core->core_index, bcma_device_name(&core->id),
512 core->id.manuf, core->id.id, core->id.rev,
513 core->id.class);
514
515 list_add_tail(&core->list, &bus->cores);
516 }
517
518 err = 0;
519out:
520 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
521 iounmap(eromptr);
522
523 return err;
524}