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;
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 bcma_erom_get_ent(bus, eromptr);
237
238 if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
239 size = bcma_erom_get_ent(bus, eromptr);
240 if (size & SCAN_SIZE_SG32)
241 bcma_erom_get_ent(bus, eromptr);
242 }
243
244 return addrl;
245 }
246
bcma_find_core_by_index(struct bcma_bus * bus,u16 index)247 static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
248 u16 index)
249 {
250 struct bcma_device *core;
251
252 list_for_each_entry(core, &bus->cores, list) {
253 if (core->core_index == index)
254 return core;
255 }
256 return NULL;
257 }
258
bcma_find_core_reverse(struct bcma_bus * bus,u16 coreid)259 static struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid)
260 {
261 struct bcma_device *core;
262
263 list_for_each_entry_reverse(core, &bus->cores, list) {
264 if (core->id.id == coreid)
265 return core;
266 }
267 return NULL;
268 }
269
270 #define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO)
271
bcma_get_next_core(struct bcma_bus * bus,u32 __iomem ** eromptr,struct bcma_device_id * match,int core_num,struct bcma_device * core)272 static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
273 struct bcma_device_id *match, int core_num,
274 struct bcma_device *core)
275 {
276 u32 tmp;
277 u8 i, j, k;
278 s32 cia, cib;
279 u8 ports[2], wrappers[2];
280
281 /* get CIs */
282 cia = bcma_erom_get_ci(bus, eromptr);
283 if (cia < 0) {
284 bcma_erom_push_ent(eromptr);
285 if (bcma_erom_is_end(bus, eromptr))
286 return -ESPIPE;
287 return -EILSEQ;
288 }
289 cib = bcma_erom_get_ci(bus, eromptr);
290 if (cib < 0)
291 return -EILSEQ;
292
293 /* parse CIs */
294 core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
295 core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
296 core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
297 ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
298 ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
299 wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
300 wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
301 core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;
302
303 if (((core->id.manuf == BCMA_MANUF_ARM) &&
304 (core->id.id == 0xFFF)) ||
305 (ports[1] == 0)) {
306 bcma_erom_skip_component(bus, eromptr);
307 return -ENXIO;
308 }
309
310 /* check if component is a core at all */
311 if (wrappers[0] + wrappers[1] == 0) {
312 /* Some specific cores don't need wrappers */
313 switch (core->id.id) {
314 case BCMA_CORE_4706_MAC_GBIT_COMMON:
315 case BCMA_CORE_NS_CHIPCOMMON_B:
316 case BCMA_CORE_PMU:
317 case BCMA_CORE_GCI:
318 /* Not used yet: case BCMA_CORE_OOB_ROUTER: */
319 break;
320 default:
321 bcma_erom_skip_component(bus, eromptr);
322 return -ENXIO;
323 }
324 }
325
326 if (bcma_erom_is_bridge(bus, eromptr)) {
327 bcma_erom_skip_component(bus, eromptr);
328 return -ENXIO;
329 }
330
331 if (bcma_find_core_by_index(bus, core_num)) {
332 bcma_erom_skip_component(bus, eromptr);
333 return -ENODEV;
334 }
335
336 if (match && ((match->manuf != BCMA_ANY_MANUF &&
337 match->manuf != core->id.manuf) ||
338 (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
339 (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
340 (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
341 )) {
342 bcma_erom_skip_component(bus, eromptr);
343 return -ENODEV;
344 }
345
346 /* get & parse master ports */
347 for (i = 0; i < ports[0]; i++) {
348 s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
349 if (mst_port_d < 0)
350 return -EILSEQ;
351 }
352
353 /* First Slave Address Descriptor should be port 0:
354 * the main register space for the core
355 */
356 tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
357 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
358 /* Try again to see if it is a bridge */
359 tmp = bcma_erom_get_addr_desc(bus, eromptr,
360 SCAN_ADDR_TYPE_BRIDGE, 0);
361 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
362 return -EILSEQ;
363 } else {
364 bcma_info(bus, "Bridge found\n");
365 return -ENXIO;
366 }
367 }
368 core->addr = tmp;
369
370 /* get & parse slave ports */
371 k = 0;
372 for (i = 0; i < ports[1]; i++) {
373 for (j = 0; ; j++) {
374 tmp = bcma_erom_get_addr_desc(bus, eromptr,
375 SCAN_ADDR_TYPE_SLAVE, i);
376 if (IS_ERR_VALUE_U32(tmp)) {
377 /* no more entries for port _i_ */
378 /* pr_debug("erom: slave port %d "
379 * "has %d descriptors\n", i, j); */
380 break;
381 } else if (k < ARRAY_SIZE(core->addr_s)) {
382 core->addr_s[k] = tmp;
383 k++;
384 }
385 }
386 }
387
388 /* get & parse master wrappers */
389 for (i = 0; i < wrappers[0]; i++) {
390 for (j = 0; ; j++) {
391 tmp = bcma_erom_get_addr_desc(bus, eromptr,
392 SCAN_ADDR_TYPE_MWRAP, i);
393 if (IS_ERR_VALUE_U32(tmp)) {
394 /* no more entries for port _i_ */
395 /* pr_debug("erom: master wrapper %d "
396 * "has %d descriptors\n", i, j); */
397 break;
398 } else {
399 if (i == 0 && j == 0)
400 core->wrap = tmp;
401 }
402 }
403 }
404
405 /* get & parse slave wrappers */
406 for (i = 0; i < wrappers[1]; i++) {
407 u8 hack = (ports[1] == 1) ? 0 : 1;
408 for (j = 0; ; j++) {
409 tmp = bcma_erom_get_addr_desc(bus, eromptr,
410 SCAN_ADDR_TYPE_SWRAP, i + hack);
411 if (IS_ERR_VALUE_U32(tmp)) {
412 /* no more entries for port _i_ */
413 /* pr_debug("erom: master wrapper %d "
414 * has %d descriptors\n", i, j); */
415 break;
416 } else {
417 if (wrappers[0] == 0 && !i && !j)
418 core->wrap = tmp;
419 }
420 }
421 }
422 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
423 core->io_addr = ioremap(core->addr, BCMA_CORE_SIZE);
424 if (!core->io_addr)
425 return -ENOMEM;
426 if (core->wrap) {
427 core->io_wrap = ioremap(core->wrap,
428 BCMA_CORE_SIZE);
429 if (!core->io_wrap) {
430 iounmap(core->io_addr);
431 return -ENOMEM;
432 }
433 }
434 }
435 return 0;
436 }
437
bcma_detect_chip(struct bcma_bus * bus)438 void bcma_detect_chip(struct bcma_bus *bus)
439 {
440 s32 tmp;
441 struct bcma_chipinfo *chipinfo = &(bus->chipinfo);
442 char chip_id[8];
443
444 bcma_scan_switch_core(bus, BCMA_ADDR_BASE);
445
446 tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
447 chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
448 chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
449 chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
450
451 snprintf(chip_id, ARRAY_SIZE(chip_id),
452 (chipinfo->id > 0x9999) ? "%d" : "0x%04X", chipinfo->id);
453 bcma_info(bus, "Found chip with id %s, rev 0x%02X and package 0x%02X\n",
454 chip_id, chipinfo->rev, chipinfo->pkg);
455 }
456
bcma_bus_scan(struct bcma_bus * bus)457 int bcma_bus_scan(struct bcma_bus *bus)
458 {
459 u32 erombase;
460 u32 __iomem *eromptr, *eromend;
461
462 int err, core_num = 0;
463
464 /* Skip if bus was already scanned (e.g. during early register) */
465 if (bus->nr_cores)
466 return 0;
467
468 erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
469 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
470 eromptr = ioremap(erombase, BCMA_CORE_SIZE);
471 if (!eromptr)
472 return -ENOMEM;
473 } else {
474 eromptr = bus->mmio;
475 }
476
477 eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
478
479 bcma_scan_switch_core(bus, erombase);
480
481 while (eromptr < eromend) {
482 struct bcma_device *other_core;
483 struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
484 if (!core) {
485 err = -ENOMEM;
486 goto out;
487 }
488 INIT_LIST_HEAD(&core->list);
489 core->bus = bus;
490
491 err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
492 if (err < 0) {
493 kfree(core);
494 if (err == -ENODEV) {
495 core_num++;
496 continue;
497 } else if (err == -ENXIO) {
498 continue;
499 } else if (err == -ESPIPE) {
500 break;
501 }
502 goto out;
503 }
504
505 core->core_index = core_num++;
506 bus->nr_cores++;
507 other_core = bcma_find_core_reverse(bus, core->id.id);
508 core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1;
509 bcma_prepare_core(bus, core);
510
511 bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
512 core->core_index, bcma_device_name(&core->id),
513 core->id.manuf, core->id.id, core->id.rev,
514 core->id.class);
515
516 list_add_tail(&core->list, &bus->cores);
517 }
518
519 err = 0;
520 out:
521 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
522 iounmap(eromptr);
523
524 return err;
525 }
526
