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 struct bcma_device_id_name bcma_device_names[] = {
23 { BCMA_CORE_OOB_ROUTER, "OOB Router" },
24 { BCMA_CORE_INVALID, "Invalid" },
25 { BCMA_CORE_CHIPCOMMON, "ChipCommon" },
26 { BCMA_CORE_ILINE20, "ILine 20" },
27 { BCMA_CORE_SRAM, "SRAM" },
28 { BCMA_CORE_SDRAM, "SDRAM" },
29 { BCMA_CORE_PCI, "PCI" },
30 { BCMA_CORE_MIPS, "MIPS" },
31 { BCMA_CORE_ETHERNET, "Fast Ethernet" },
32 { BCMA_CORE_V90, "V90" },
33 { BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
34 { BCMA_CORE_ADSL, "ADSL" },
35 { BCMA_CORE_ILINE100, "ILine 100" },
36 { BCMA_CORE_IPSEC, "IPSEC" },
37 { BCMA_CORE_UTOPIA, "UTOPIA" },
38 { BCMA_CORE_PCMCIA, "PCMCIA" },
39 { BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
40 { BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
41 { BCMA_CORE_OFDM, "OFDM" },
42 { BCMA_CORE_EXTIF, "EXTIF" },
43 { BCMA_CORE_80211, "IEEE 802.11" },
44 { BCMA_CORE_PHY_A, "PHY A" },
45 { BCMA_CORE_PHY_B, "PHY B" },
46 { BCMA_CORE_PHY_G, "PHY G" },
47 { BCMA_CORE_MIPS_3302, "MIPS 3302" },
48 { BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
49 { BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
50 { BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
51 { BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
52 { BCMA_CORE_SDIO_HOST, "SDIO Host" },
53 { BCMA_CORE_ROBOSWITCH, "Roboswitch" },
54 { BCMA_CORE_PARA_ATA, "PATA" },
55 { BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
56 { BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
57 { BCMA_CORE_PCIE, "PCIe" },
58 { BCMA_CORE_PHY_N, "PHY N" },
59 { BCMA_CORE_SRAM_CTL, "SRAM Controller" },
60 { BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
61 { BCMA_CORE_ARM_1176, "ARM 1176" },
62 { BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
63 { BCMA_CORE_PHY_LP, "PHY LP" },
64 { BCMA_CORE_PMU, "PMU" },
65 { BCMA_CORE_PHY_SSN, "PHY SSN" },
66 { BCMA_CORE_SDIO_DEV, "SDIO Device" },
67 { BCMA_CORE_ARM_CM3, "ARM CM3" },
68 { BCMA_CORE_PHY_HT, "PHY HT" },
69 { BCMA_CORE_MIPS_74K, "MIPS 74K" },
70 { BCMA_CORE_MAC_GBIT, "GBit MAC" },
71 { BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
72 { BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
73 { BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
74 { BCMA_CORE_SHARED_COMMON, "Common Shared" },
75 { BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
76 { BCMA_CORE_SPI_HOST, "SPI Host" },
77 { BCMA_CORE_I2S, "I2S" },
78 { BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
79 { BCMA_CORE_SHIM, "SHIM" },
80 { BCMA_CORE_DEFAULT, "Default" },
81 };
bcma_device_name(struct bcma_device_id * id)82 const char *bcma_device_name(struct bcma_device_id *id)
83 {
84 int i;
85
86 if (id->manuf == BCMA_MANUF_BCM) {
87 for (i = 0; i < ARRAY_SIZE(bcma_device_names); i++) {
88 if (bcma_device_names[i].id == id->id)
89 return bcma_device_names[i].name;
90 }
91 }
92 return "UNKNOWN";
93 }
94
bcma_scan_read32(struct bcma_bus * bus,u8 current_coreidx,u16 offset)95 static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx,
96 u16 offset)
97 {
98 return readl(bus->mmio + offset);
99 }
100
bcma_scan_switch_core(struct bcma_bus * bus,u32 addr)101 static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
102 {
103 if (bus->hosttype == BCMA_HOSTTYPE_PCI)
104 pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
105 addr);
106 }
107
bcma_erom_get_ent(struct bcma_bus * bus,u32 ** eromptr)108 static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 **eromptr)
109 {
110 u32 ent = readl(*eromptr);
111 (*eromptr)++;
112 return ent;
113 }
114
bcma_erom_push_ent(u32 ** eromptr)115 static void bcma_erom_push_ent(u32 **eromptr)
116 {
117 (*eromptr)--;
118 }
119
bcma_erom_get_ci(struct bcma_bus * bus,u32 ** eromptr)120 static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 **eromptr)
121 {
122 u32 ent = bcma_erom_get_ent(bus, eromptr);
123 if (!(ent & SCAN_ER_VALID))
124 return -ENOENT;
125 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
126 return -ENOENT;
127 return ent;
128 }
129
bcma_erom_is_end(struct bcma_bus * bus,u32 ** eromptr)130 static bool bcma_erom_is_end(struct bcma_bus *bus, u32 **eromptr)
131 {
132 u32 ent = bcma_erom_get_ent(bus, eromptr);
133 bcma_erom_push_ent(eromptr);
134 return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
135 }
136
bcma_erom_is_bridge(struct bcma_bus * bus,u32 ** eromptr)137 static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 **eromptr)
138 {
139 u32 ent = bcma_erom_get_ent(bus, eromptr);
140 bcma_erom_push_ent(eromptr);
141 return (((ent & SCAN_ER_VALID)) &&
142 ((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
143 ((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
144 }
145
bcma_erom_skip_component(struct bcma_bus * bus,u32 ** eromptr)146 static void bcma_erom_skip_component(struct bcma_bus *bus, u32 **eromptr)
147 {
148 u32 ent;
149 while (1) {
150 ent = bcma_erom_get_ent(bus, eromptr);
151 if ((ent & SCAN_ER_VALID) &&
152 ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
153 break;
154 if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
155 break;
156 }
157 bcma_erom_push_ent(eromptr);
158 }
159
bcma_erom_get_mst_port(struct bcma_bus * bus,u32 ** eromptr)160 static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 **eromptr)
161 {
162 u32 ent = bcma_erom_get_ent(bus, eromptr);
163 if (!(ent & SCAN_ER_VALID))
164 return -ENOENT;
165 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
166 return -ENOENT;
167 return ent;
168 }
169
bcma_erom_get_addr_desc(struct bcma_bus * bus,u32 ** eromptr,u32 type,u8 port)170 static s32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 **eromptr,
171 u32 type, u8 port)
172 {
173 u32 addrl, addrh, sizel, sizeh = 0;
174 u32 size;
175
176 u32 ent = bcma_erom_get_ent(bus, eromptr);
177 if ((!(ent & SCAN_ER_VALID)) ||
178 ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
179 ((ent & SCAN_ADDR_TYPE) != type) ||
180 (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
181 bcma_erom_push_ent(eromptr);
182 return -EINVAL;
183 }
184
185 addrl = ent & SCAN_ADDR_ADDR;
186 if (ent & SCAN_ADDR_AG32)
187 addrh = bcma_erom_get_ent(bus, eromptr);
188 else
189 addrh = 0;
190
191 if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
192 size = bcma_erom_get_ent(bus, eromptr);
193 sizel = size & SCAN_SIZE_SZ;
194 if (size & SCAN_SIZE_SG32)
195 sizeh = bcma_erom_get_ent(bus, eromptr);
196 } else
197 sizel = SCAN_ADDR_SZ_BASE <<
198 ((ent & SCAN_ADDR_SZ) >> SCAN_ADDR_SZ_SHIFT);
199
200 return addrl;
201 }
202
bcma_find_core_by_index(struct bcma_bus * bus,u16 index)203 static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
204 u16 index)
205 {
206 struct bcma_device *core;
207
208 list_for_each_entry(core, &bus->cores, list) {
209 if (core->core_index == index)
210 return core;
211 }
212 return NULL;
213 }
214
bcma_get_next_core(struct bcma_bus * bus,u32 __iomem ** eromptr,struct bcma_device_id * match,int core_num,struct bcma_device * core)215 static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
216 struct bcma_device_id *match, int core_num,
217 struct bcma_device *core)
218 {
219 s32 tmp;
220 u8 i, j;
221 s32 cia, cib;
222 u8 ports[2], wrappers[2];
223
224 /* get CIs */
225 cia = bcma_erom_get_ci(bus, eromptr);
226 if (cia < 0) {
227 bcma_erom_push_ent(eromptr);
228 if (bcma_erom_is_end(bus, eromptr))
229 return -ESPIPE;
230 return -EILSEQ;
231 }
232 cib = bcma_erom_get_ci(bus, eromptr);
233 if (cib < 0)
234 return -EILSEQ;
235
236 /* parse CIs */
237 core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
238 core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
239 core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
240 ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
241 ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
242 wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
243 wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
244 core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;
245
246 if (((core->id.manuf == BCMA_MANUF_ARM) &&
247 (core->id.id == 0xFFF)) ||
248 (ports[1] == 0)) {
249 bcma_erom_skip_component(bus, eromptr);
250 return -ENXIO;
251 }
252
253 /* check if component is a core at all */
254 if (wrappers[0] + wrappers[1] == 0) {
255 /* we could save addrl of the router
256 if (cid == BCMA_CORE_OOB_ROUTER)
257 */
258 bcma_erom_skip_component(bus, eromptr);
259 return -ENXIO;
260 }
261
262 if (bcma_erom_is_bridge(bus, eromptr)) {
263 bcma_erom_skip_component(bus, eromptr);
264 return -ENXIO;
265 }
266
267 if (bcma_find_core_by_index(bus, core_num)) {
268 bcma_erom_skip_component(bus, eromptr);
269 return -ENODEV;
270 }
271
272 if (match && ((match->manuf != BCMA_ANY_MANUF &&
273 match->manuf != core->id.manuf) ||
274 (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
275 (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
276 (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
277 )) {
278 bcma_erom_skip_component(bus, eromptr);
279 return -ENODEV;
280 }
281
282 /* get & parse master ports */
283 for (i = 0; i < ports[0]; i++) {
284 s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
285 if (mst_port_d < 0)
286 return -EILSEQ;
287 }
288
289 /* get & parse slave ports */
290 for (i = 0; i < ports[1]; i++) {
291 for (j = 0; ; j++) {
292 tmp = bcma_erom_get_addr_desc(bus, eromptr,
293 SCAN_ADDR_TYPE_SLAVE, i);
294 if (tmp < 0) {
295 /* no more entries for port _i_ */
296 /* pr_debug("erom: slave port %d "
297 * "has %d descriptors\n", i, j); */
298 break;
299 } else {
300 if (i == 0 && j == 0)
301 core->addr = tmp;
302 }
303 }
304 }
305
306 /* get & parse master wrappers */
307 for (i = 0; i < wrappers[0]; i++) {
308 for (j = 0; ; j++) {
309 tmp = bcma_erom_get_addr_desc(bus, eromptr,
310 SCAN_ADDR_TYPE_MWRAP, i);
311 if (tmp < 0) {
312 /* no more entries for port _i_ */
313 /* pr_debug("erom: master wrapper %d "
314 * "has %d descriptors\n", i, j); */
315 break;
316 } else {
317 if (i == 0 && j == 0)
318 core->wrap = tmp;
319 }
320 }
321 }
322
323 /* get & parse slave wrappers */
324 for (i = 0; i < wrappers[1]; i++) {
325 u8 hack = (ports[1] == 1) ? 0 : 1;
326 for (j = 0; ; j++) {
327 tmp = bcma_erom_get_addr_desc(bus, eromptr,
328 SCAN_ADDR_TYPE_SWRAP, i + hack);
329 if (tmp < 0) {
330 /* no more entries for port _i_ */
331 /* pr_debug("erom: master wrapper %d "
332 * has %d descriptors\n", i, j); */
333 break;
334 } else {
335 if (wrappers[0] == 0 && !i && !j)
336 core->wrap = tmp;
337 }
338 }
339 }
340 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
341 core->io_addr = ioremap_nocache(core->addr, BCMA_CORE_SIZE);
342 if (!core->io_addr)
343 return -ENOMEM;
344 core->io_wrap = ioremap_nocache(core->wrap, BCMA_CORE_SIZE);
345 if (!core->io_wrap) {
346 iounmap(core->io_addr);
347 return -ENOMEM;
348 }
349 }
350 return 0;
351 }
352
bcma_init_bus(struct bcma_bus * bus)353 void bcma_init_bus(struct bcma_bus *bus)
354 {
355 s32 tmp;
356
357 if (bus->init_done)
358 return;
359
360 INIT_LIST_HEAD(&bus->cores);
361 bus->nr_cores = 0;
362
363 bcma_scan_switch_core(bus, BCMA_ADDR_BASE);
364
365 tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
366 bus->chipinfo.id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
367 bus->chipinfo.rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
368 bus->chipinfo.pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
369 bus->init_done = true;
370 }
371
bcma_bus_scan(struct bcma_bus * bus)372 int bcma_bus_scan(struct bcma_bus *bus)
373 {
374 u32 erombase;
375 u32 __iomem *eromptr, *eromend;
376
377 int err, core_num = 0;
378
379 bcma_init_bus(bus);
380
381 erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
382 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
383 eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
384 if (!eromptr)
385 return -ENOMEM;
386 } else {
387 eromptr = bus->mmio;
388 }
389
390 eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
391
392 bcma_scan_switch_core(bus, erombase);
393
394 while (eromptr < eromend) {
395 struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
396 if (!core)
397 return -ENOMEM;
398 INIT_LIST_HEAD(&core->list);
399 core->bus = bus;
400
401 err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
402 if (err < 0) {
403 kfree(core);
404 if (err == -ENODEV) {
405 core_num++;
406 continue;
407 } else if (err == -ENXIO) {
408 continue;
409 } else if (err == -ESPIPE) {
410 break;
411 }
412 return err;
413 }
414
415 core->core_index = core_num++;
416 bus->nr_cores++;
417
418 pr_info("Core %d found: %s "
419 "(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
420 core->core_index, bcma_device_name(&core->id),
421 core->id.manuf, core->id.id, core->id.rev,
422 core->id.class);
423
424 list_add(&core->list, &bus->cores);
425 }
426
427 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
428 iounmap(eromptr);
429
430 return 0;
431 }
432
bcma_bus_scan_early(struct bcma_bus * bus,struct bcma_device_id * match,struct bcma_device * core)433 int __init bcma_bus_scan_early(struct bcma_bus *bus,
434 struct bcma_device_id *match,
435 struct bcma_device *core)
436 {
437 u32 erombase;
438 u32 __iomem *eromptr, *eromend;
439
440 int err = -ENODEV;
441 int core_num = 0;
442
443 erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
444 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
445 eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
446 if (!eromptr)
447 return -ENOMEM;
448 } else {
449 eromptr = bus->mmio;
450 }
451
452 eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
453
454 bcma_scan_switch_core(bus, erombase);
455
456 while (eromptr < eromend) {
457 memset(core, 0, sizeof(*core));
458 INIT_LIST_HEAD(&core->list);
459 core->bus = bus;
460
461 err = bcma_get_next_core(bus, &eromptr, match, core_num, core);
462 if (err == -ENODEV) {
463 core_num++;
464 continue;
465 } else if (err == -ENXIO)
466 continue;
467 else if (err == -ESPIPE)
468 break;
469 else if (err < 0)
470 return err;
471
472 core->core_index = core_num++;
473 bus->nr_cores++;
474 pr_info("Core %d found: %s "
475 "(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
476 core->core_index, bcma_device_name(&core->id),
477 core->id.manuf, core->id.id, core->id.rev,
478 core->id.class);
479
480 list_add(&core->list, &bus->cores);
481 err = 0;
482 break;
483 }
484
485 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
486 iounmap(eromptr);
487
488 return err;
489 }
490