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
18 struct bcma_device_id_name {
19 u16 id;
20 const char *name;
21 };
22
23 static 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
30 static 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
107 static 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
bcma_device_name(const struct bcma_device_id * id)113 static 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
bcma_scan_read32(struct bcma_bus * bus,u8 current_coreidx,u16 offset)144 static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx,
145 u16 offset)
146 {
147 return readl(bus->mmio + offset);
148 }
149
bcma_scan_switch_core(struct bcma_bus * bus,u32 addr)150 static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
151 {
152 if (bus->hosttype == BCMA_HOSTTYPE_PCI)
153 pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
154 addr);
155 }
156
bcma_erom_get_ent(struct bcma_bus * bus,u32 __iomem ** eromptr)157 static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 __iomem **eromptr)
158 {
159 u32 ent = readl(*eromptr);
160 (*eromptr)++;
161 return ent;
162 }
163
bcma_erom_push_ent(u32 __iomem ** eromptr)164 static void bcma_erom_push_ent(u32 __iomem **eromptr)
165 {
166 (*eromptr)--;
167 }
168
bcma_erom_get_ci(struct bcma_bus * bus,u32 __iomem ** eromptr)169 static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 __iomem **eromptr)
170 {
171 u32 ent = bcma_erom_get_ent(bus, eromptr);
172 if (!(ent & SCAN_ER_VALID))
173 return -ENOENT;
174 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
175 return -ENOENT;
176 return ent;
177 }
178
bcma_erom_is_end(struct bcma_bus * bus,u32 __iomem ** eromptr)179 static bool bcma_erom_is_end(struct bcma_bus *bus, u32 __iomem **eromptr)
180 {
181 u32 ent = bcma_erom_get_ent(bus, eromptr);
182 bcma_erom_push_ent(eromptr);
183 return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
184 }
185
bcma_erom_is_bridge(struct bcma_bus * bus,u32 __iomem ** eromptr)186 static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 __iomem **eromptr)
187 {
188 u32 ent = bcma_erom_get_ent(bus, eromptr);
189 bcma_erom_push_ent(eromptr);
190 return (((ent & SCAN_ER_VALID)) &&
191 ((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
192 ((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
193 }
194
bcma_erom_skip_component(struct bcma_bus * bus,u32 __iomem ** eromptr)195 static void bcma_erom_skip_component(struct bcma_bus *bus, u32 __iomem **eromptr)
196 {
197 u32 ent;
198 while (1) {
199 ent = bcma_erom_get_ent(bus, eromptr);
200 if ((ent & SCAN_ER_VALID) &&
201 ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
202 break;
203 if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
204 break;
205 }
206 bcma_erom_push_ent(eromptr);
207 }
208
bcma_erom_get_mst_port(struct bcma_bus * bus,u32 __iomem ** eromptr)209 static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 __iomem **eromptr)
210 {
211 u32 ent = bcma_erom_get_ent(bus, eromptr);
212 if (!(ent & SCAN_ER_VALID))
213 return -ENOENT;
214 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
215 return -ENOENT;
216 return ent;
217 }
218
bcma_erom_get_addr_desc(struct bcma_bus * bus,u32 __iomem ** eromptr,u32 type,u8 port)219 static u32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 __iomem **eromptr,
220 u32 type, u8 port)
221 {
222 u32 addrl, addrh, sizel, sizeh = 0;
223 u32 size;
224
225 u32 ent = bcma_erom_get_ent(bus, eromptr);
226 if ((!(ent & SCAN_ER_VALID)) ||
227 ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
228 ((ent & SCAN_ADDR_TYPE) != type) ||
229 (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
230 bcma_erom_push_ent(eromptr);
231 return (u32)-EINVAL;
232 }
233
234 addrl = ent & SCAN_ADDR_ADDR;
235 if (ent & SCAN_ADDR_AG32)
236 addrh = bcma_erom_get_ent(bus, eromptr);
237 else
238 addrh = 0;
239
240 if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
241 size = bcma_erom_get_ent(bus, eromptr);
242 sizel = size & SCAN_SIZE_SZ;
243 if (size & SCAN_SIZE_SG32)
244 sizeh = bcma_erom_get_ent(bus, eromptr);
245 } else
246 sizel = SCAN_ADDR_SZ_BASE <<
247 ((ent & SCAN_ADDR_SZ) >> SCAN_ADDR_SZ_SHIFT);
248
249 return addrl;
250 }
251
bcma_find_core_by_index(struct bcma_bus * bus,u16 index)252 static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
253 u16 index)
254 {
255 struct bcma_device *core;
256
257 list_for_each_entry(core, &bus->cores, list) {
258 if (core->core_index == index)
259 return core;
260 }
261 return NULL;
262 }
263
bcma_find_core_reverse(struct bcma_bus * bus,u16 coreid)264 static struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid)
265 {
266 struct bcma_device *core;
267
268 list_for_each_entry_reverse(core, &bus->cores, list) {
269 if (core->id.id == coreid)
270 return core;
271 }
272 return NULL;
273 }
274
275 #define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO)
276
bcma_get_next_core(struct bcma_bus * bus,u32 __iomem ** eromptr,struct bcma_device_id * match,int core_num,struct bcma_device * core)277 static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
278 struct bcma_device_id *match, int core_num,
279 struct bcma_device *core)
280 {
281 u32 tmp;
282 u8 i, j, k;
283 s32 cia, cib;
284 u8 ports[2], wrappers[2];
285
286 /* get CIs */
287 cia = bcma_erom_get_ci(bus, eromptr);
288 if (cia < 0) {
289 bcma_erom_push_ent(eromptr);
290 if (bcma_erom_is_end(bus, eromptr))
291 return -ESPIPE;
292 return -EILSEQ;
293 }
294 cib = bcma_erom_get_ci(bus, eromptr);
295 if (cib < 0)
296 return -EILSEQ;
297
298 /* parse CIs */
299 core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
300 core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
301 core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
302 ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
303 ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
304 wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
305 wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
306 core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;
307
308 if (((core->id.manuf == BCMA_MANUF_ARM) &&
309 (core->id.id == 0xFFF)) ||
310 (ports[1] == 0)) {
311 bcma_erom_skip_component(bus, eromptr);
312 return -ENXIO;
313 }
314
315 /* check if component is a core at all */
316 if (wrappers[0] + wrappers[1] == 0) {
317 /* Some specific cores don't need wrappers */
318 switch (core->id.id) {
319 case BCMA_CORE_4706_MAC_GBIT_COMMON:
320 case BCMA_CORE_NS_CHIPCOMMON_B:
321 case BCMA_CORE_PMU:
322 case BCMA_CORE_GCI:
323 /* Not used yet: case BCMA_CORE_OOB_ROUTER: */
324 break;
325 default:
326 bcma_erom_skip_component(bus, eromptr);
327 return -ENXIO;
328 }
329 }
330
331 if (bcma_erom_is_bridge(bus, eromptr)) {
332 bcma_erom_skip_component(bus, eromptr);
333 return -ENXIO;
334 }
335
336 if (bcma_find_core_by_index(bus, core_num)) {
337 bcma_erom_skip_component(bus, eromptr);
338 return -ENODEV;
339 }
340
341 if (match && ((match->manuf != BCMA_ANY_MANUF &&
342 match->manuf != core->id.manuf) ||
343 (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
344 (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
345 (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
346 )) {
347 bcma_erom_skip_component(bus, eromptr);
348 return -ENODEV;
349 }
350
351 /* get & parse master ports */
352 for (i = 0; i < ports[0]; i++) {
353 s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
354 if (mst_port_d < 0)
355 return -EILSEQ;
356 }
357
358 /* First Slave Address Descriptor should be port 0:
359 * the main register space for the core
360 */
361 tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
362 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
363 /* Try again to see if it is a bridge */
364 tmp = bcma_erom_get_addr_desc(bus, eromptr,
365 SCAN_ADDR_TYPE_BRIDGE, 0);
366 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
367 return -EILSEQ;
368 } else {
369 bcma_info(bus, "Bridge found\n");
370 return -ENXIO;
371 }
372 }
373 core->addr = tmp;
374
375 /* get & parse slave ports */
376 k = 0;
377 for (i = 0; i < ports[1]; i++) {
378 for (j = 0; ; j++) {
379 tmp = bcma_erom_get_addr_desc(bus, eromptr,
380 SCAN_ADDR_TYPE_SLAVE, i);
381 if (IS_ERR_VALUE_U32(tmp)) {
382 /* no more entries for port _i_ */
383 /* pr_debug("erom: slave port %d "
384 * "has %d descriptors\n", i, j); */
385 break;
386 } else if (k < ARRAY_SIZE(core->addr_s)) {
387 core->addr_s[k] = tmp;
388 k++;
389 }
390 }
391 }
392
393 /* get & parse master wrappers */
394 for (i = 0; i < wrappers[0]; i++) {
395 for (j = 0; ; j++) {
396 tmp = bcma_erom_get_addr_desc(bus, eromptr,
397 SCAN_ADDR_TYPE_MWRAP, i);
398 if (IS_ERR_VALUE_U32(tmp)) {
399 /* no more entries for port _i_ */
400 /* pr_debug("erom: master wrapper %d "
401 * "has %d descriptors\n", i, j); */
402 break;
403 } else {
404 if (i == 0 && j == 0)
405 core->wrap = tmp;
406 }
407 }
408 }
409
410 /* get & parse slave wrappers */
411 for (i = 0; i < wrappers[1]; i++) {
412 u8 hack = (ports[1] == 1) ? 0 : 1;
413 for (j = 0; ; j++) {
414 tmp = bcma_erom_get_addr_desc(bus, eromptr,
415 SCAN_ADDR_TYPE_SWRAP, i + hack);
416 if (IS_ERR_VALUE_U32(tmp)) {
417 /* no more entries for port _i_ */
418 /* pr_debug("erom: master wrapper %d "
419 * has %d descriptors\n", i, j); */
420 break;
421 } else {
422 if (wrappers[0] == 0 && !i && !j)
423 core->wrap = tmp;
424 }
425 }
426 }
427 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
428 core->io_addr = ioremap_nocache(core->addr, BCMA_CORE_SIZE);
429 if (!core->io_addr)
430 return -ENOMEM;
431 if (core->wrap) {
432 core->io_wrap = ioremap_nocache(core->wrap,
433 BCMA_CORE_SIZE);
434 if (!core->io_wrap) {
435 iounmap(core->io_addr);
436 return -ENOMEM;
437 }
438 }
439 }
440 return 0;
441 }
442
bcma_detect_chip(struct bcma_bus * bus)443 void bcma_detect_chip(struct bcma_bus *bus)
444 {
445 s32 tmp;
446 struct bcma_chipinfo *chipinfo = &(bus->chipinfo);
447 char chip_id[8];
448
449 bcma_scan_switch_core(bus, BCMA_ADDR_BASE);
450
451 tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
452 chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
453 chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
454 chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
455
456 snprintf(chip_id, ARRAY_SIZE(chip_id),
457 (chipinfo->id > 0x9999) ? "%d" : "0x%04X", chipinfo->id);
458 bcma_info(bus, "Found chip with id %s, rev 0x%02X and package 0x%02X\n",
459 chip_id, chipinfo->rev, chipinfo->pkg);
460 }
461
bcma_bus_scan(struct bcma_bus * bus)462 int bcma_bus_scan(struct bcma_bus *bus)
463 {
464 u32 erombase;
465 u32 __iomem *eromptr, *eromend;
466
467 int err, core_num = 0;
468
469 /* Skip if bus was already scanned (e.g. during early register) */
470 if (bus->nr_cores)
471 return 0;
472
473 erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
474 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
475 eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
476 if (!eromptr)
477 return -ENOMEM;
478 } else {
479 eromptr = bus->mmio;
480 }
481
482 eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
483
484 bcma_scan_switch_core(bus, erombase);
485
486 while (eromptr < eromend) {
487 struct bcma_device *other_core;
488 struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
489 if (!core) {
490 err = -ENOMEM;
491 goto out;
492 }
493 INIT_LIST_HEAD(&core->list);
494 core->bus = bus;
495
496 err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
497 if (err < 0) {
498 kfree(core);
499 if (err == -ENODEV) {
500 core_num++;
501 continue;
502 } else if (err == -ENXIO) {
503 continue;
504 } else if (err == -ESPIPE) {
505 break;
506 }
507 goto out;
508 }
509
510 core->core_index = core_num++;
511 bus->nr_cores++;
512 other_core = bcma_find_core_reverse(bus, core->id.id);
513 core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1;
514 bcma_prepare_core(bus, core);
515
516 bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
517 core->core_index, bcma_device_name(&core->id),
518 core->id.manuf, core->id.id, core->id.rev,
519 core->id.class);
520
521 list_add_tail(&core->list, &bus->cores);
522 }
523
524 err = 0;
525 out:
526 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
527 iounmap(eromptr);
528
529 return err;
530 }
531
