1/*
2 * Sonics Silicon Backplane
3 * Bus scanning
4 *
5 * Copyright (C) 2005-2007 Michael Buesch <m@bues.ch>
6 * Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
7 * Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
8 * Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
9 * Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
10 * Copyright (C) 2006 Broadcom Corporation.
11 *
12 * Licensed under the GNU/GPL. See COPYING for details.
13 */
14
15#include "ssb_private.h"
16
17#include <linux/ssb/ssb.h>
18#include <linux/ssb/ssb_regs.h>
19#include <linux/pci.h>
20#include <linux/io.h>
21
22#include <pcmcia/cistpl.h>
23#include <pcmcia/ds.h>
24
25
26const char *ssb_core_name(u16 coreid)
27{
28 switch (coreid) {
29 case SSB_DEV_CHIPCOMMON:
30 return "ChipCommon";
31 case SSB_DEV_ILINE20:
32 return "ILine 20";
33 case SSB_DEV_SDRAM:
34 return "SDRAM";
35 case SSB_DEV_PCI:
36 return "PCI";
37 case SSB_DEV_MIPS:
38 return "MIPS";
39 case SSB_DEV_ETHERNET:
40 return "Fast Ethernet";
41 case SSB_DEV_V90:
42 return "V90";
43 case SSB_DEV_USB11_HOSTDEV:
44 return "USB 1.1 Hostdev";
45 case SSB_DEV_ADSL:
46 return "ADSL";
47 case SSB_DEV_ILINE100:
48 return "ILine 100";
49 case SSB_DEV_IPSEC:
50 return "IPSEC";
51 case SSB_DEV_PCMCIA:
52 return "PCMCIA";
53 case SSB_DEV_INTERNAL_MEM:
54 return "Internal Memory";
55 case SSB_DEV_MEMC_SDRAM:
56 return "MEMC SDRAM";
57 case SSB_DEV_EXTIF:
58 return "EXTIF";
59 case SSB_DEV_80211:
60 return "IEEE 802.11";
61 case SSB_DEV_MIPS_3302:
62 return "MIPS 3302";
63 case SSB_DEV_USB11_HOST:
64 return "USB 1.1 Host";
65 case SSB_DEV_USB11_DEV:
66 return "USB 1.1 Device";
67 case SSB_DEV_USB20_HOST:
68 return "USB 2.0 Host";
69 case SSB_DEV_USB20_DEV:
70 return "USB 2.0 Device";
71 case SSB_DEV_SDIO_HOST:
72 return "SDIO Host";
73 case SSB_DEV_ROBOSWITCH:
74 return "Roboswitch";
75 case SSB_DEV_PARA_ATA:
76 return "PATA";
77 case SSB_DEV_SATA_XORDMA:
78 return "SATA XOR-DMA";
79 case SSB_DEV_ETHERNET_GBIT:
80 return "GBit Ethernet";
81 case SSB_DEV_PCIE:
82 return "PCI-E";
83 case SSB_DEV_MIMO_PHY:
84 return "MIMO PHY";
85 case SSB_DEV_SRAM_CTRLR:
86 return "SRAM Controller";
87 case SSB_DEV_MINI_MACPHY:
88 return "Mini MACPHY";
89 case SSB_DEV_ARM_1176:
90 return "ARM 1176";
91 case SSB_DEV_ARM_7TDMI:
92 return "ARM 7TDMI";
93 case SSB_DEV_ARM_CM3:
94 return "ARM Cortex M3";
95 }
96 return "UNKNOWN";
97}
98
99static u16 pcidev_to_chipid(struct pci_dev *pci_dev)
100{
101 u16 chipid_fallback = 0;
102
103 switch (pci_dev->device) {
104 case 0x4301:
105 chipid_fallback = 0x4301;
106 break;
107 case 0x4305 ... 0x4307:
108 chipid_fallback = 0x4307;
109 break;
110 case 0x4403:
111 chipid_fallback = 0x4402;
112 break;
113 case 0x4610 ... 0x4615:
114 chipid_fallback = 0x4610;
115 break;
116 case 0x4710 ... 0x4715:
117 chipid_fallback = 0x4710;
118 break;
119 case 0x4320 ... 0x4325:
120 chipid_fallback = 0x4309;
121 break;
122 case PCI_DEVICE_ID_BCM4401:
123 case PCI_DEVICE_ID_BCM4401B0:
124 case PCI_DEVICE_ID_BCM4401B1:
125 chipid_fallback = 0x4401;
126 break;
127 default:
128 dev_err(&pci_dev->dev, "PCI-ID not in fallback list\n");
129 }
130
131 return chipid_fallback;
132}
133
134static u8 chipid_to_nrcores(u16 chipid)
135{
136 switch (chipid) {
137 case 0x5365:
138 return 7;
139 case 0x4306:
140 return 6;
141 case 0x4310:
142 return 8;
143 case 0x4307:
144 case 0x4301:
145 return 5;
146 case 0x4401:
147 case 0x4402:
148 return 3;
149 case 0x4710:
150 case 0x4610:
151 case 0x4704:
152 return 9;
153 default:
154 pr_err("CHIPID not in nrcores fallback list\n");
155 }
156
157 return 1;
158}
159
160static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
161 u16 offset)
162{
163 u32 lo, hi;
164
165 switch (bus->bustype) {
166 case SSB_BUSTYPE_SSB:
167 offset += current_coreidx * SSB_CORE_SIZE;
168 break;
169 case SSB_BUSTYPE_PCI:
170 break;
171 case SSB_BUSTYPE_PCMCIA:
172 if (offset >= 0x800) {
173 ssb_pcmcia_switch_segment(bus, 1);
174 offset -= 0x800;
175 } else
176 ssb_pcmcia_switch_segment(bus, 0);
177 lo = readw(bus->mmio + offset);
178 hi = readw(bus->mmio + offset + 2);
179 return lo | (hi << 16);
180 case SSB_BUSTYPE_SDIO:
181 offset += current_coreidx * SSB_CORE_SIZE;
182 return ssb_sdio_scan_read32(bus, offset);
183 }
184 return readl(bus->mmio + offset);
185}
186
187static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
188{
189 switch (bus->bustype) {
190 case SSB_BUSTYPE_SSB:
191 break;
192 case SSB_BUSTYPE_PCI:
193 return ssb_pci_switch_coreidx(bus, coreidx);
194 case SSB_BUSTYPE_PCMCIA:
195 return ssb_pcmcia_switch_coreidx(bus, coreidx);
196 case SSB_BUSTYPE_SDIO:
197 return ssb_sdio_scan_switch_coreidx(bus, coreidx);
198 }
199 return 0;
200}
201
202void ssb_iounmap(struct ssb_bus *bus)
203{
204 switch (bus->bustype) {
205 case SSB_BUSTYPE_SSB:
206 case SSB_BUSTYPE_PCMCIA:
207 iounmap(bus->mmio);
208 break;
209 case SSB_BUSTYPE_PCI:
210#ifdef CONFIG_SSB_PCIHOST
211 pci_iounmap(bus->host_pci, bus->mmio);
212#else
213 WARN_ON(1); /* Can't reach this code. */
214#endif
215 break;
216 case SSB_BUSTYPE_SDIO:
217 break;
218 }
219 bus->mmio = NULL;
220 bus->mapped_device = NULL;
221}
222
223static void __iomem *ssb_ioremap(struct ssb_bus *bus,
224 unsigned long baseaddr)
225{
226 void __iomem *mmio = NULL;
227
228 switch (bus->bustype) {
229 case SSB_BUSTYPE_SSB:
230 /* Only map the first core for now. */
231 /* fallthrough... */
232 case SSB_BUSTYPE_PCMCIA:
233 mmio = ioremap(baseaddr, SSB_CORE_SIZE);
234 break;
235 case SSB_BUSTYPE_PCI:
236#ifdef CONFIG_SSB_PCIHOST
237 mmio = pci_iomap(bus->host_pci, 0, ~0UL);
238#else
239 WARN_ON(1); /* Can't reach this code. */
240#endif
241 break;
242 case SSB_BUSTYPE_SDIO:
243 /* Nothing to ioremap in the SDIO case, just fake it */
244 mmio = (void __iomem *)baseaddr;
245 break;
246 }
247
248 return mmio;
249}
250
251static int we_support_multiple_80211_cores(struct ssb_bus *bus)
252{
253 /* More than one 802.11 core is only supported by special chips.
254 * There are chips with two 802.11 cores, but with dangling
255 * pins on the second core. Be careful and reject them here.
256 */
257
258#ifdef CONFIG_SSB_PCIHOST
259 if (bus->bustype == SSB_BUSTYPE_PCI) {
260 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
261 ((bus->host_pci->device == 0x4313) ||
262 (bus->host_pci->device == 0x431A) ||
263 (bus->host_pci->device == 0x4321) ||
264 (bus->host_pci->device == 0x4324)))
265 return 1;
266 }
267#endif /* CONFIG_SSB_PCIHOST */
268 return 0;
269}
270
271int ssb_bus_scan(struct ssb_bus *bus,
272 unsigned long baseaddr)
273{
274 int err = -ENOMEM;
275 void __iomem *mmio;
276 u32 idhi, cc, rev, tmp;
277 int dev_i, i;
278 struct ssb_device *dev;
279 int nr_80211_cores = 0;
280
281 mmio = ssb_ioremap(bus, baseaddr);
282 if (!mmio)
283 goto out;
284 bus->mmio = mmio;
285
286 err = scan_switchcore(bus, 0); /* Switch to first core */
287 if (err)
288 goto err_unmap;
289
290 idhi = scan_read32(bus, 0, SSB_IDHIGH);
291 cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
292 rev = (idhi & SSB_IDHIGH_RCLO);
293 rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
294
295 bus->nr_devices = 0;
296 if (cc == SSB_DEV_CHIPCOMMON) {
297 tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID);
298
299 bus->chip_id = (tmp & SSB_CHIPCO_IDMASK);
300 bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >>
301 SSB_CHIPCO_REVSHIFT;
302 bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >>
303 SSB_CHIPCO_PACKSHIFT;
304 if (rev >= 4) {
305 bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >>
306 SSB_CHIPCO_NRCORESSHIFT;
307 }
308 tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP);
309 bus->chipco.capabilities = tmp;
310 } else {
311 if (bus->bustype == SSB_BUSTYPE_PCI) {
312 bus->chip_id = pcidev_to_chipid(bus->host_pci);
313 bus->chip_rev = bus->host_pci->revision;
314 bus->chip_package = 0;
315 } else {
316 bus->chip_id = 0x4710;
317 bus->chip_rev = 0;
318 bus->chip_package = 0;
319 }
320 }
321 pr_info("Found chip with id 0x%04X, rev 0x%02X and package 0x%02X\n",
322 bus->chip_id, bus->chip_rev, bus->chip_package);
323 if (!bus->nr_devices)
324 bus->nr_devices = chipid_to_nrcores(bus->chip_id);
325 if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
326 pr_err("More than %d ssb cores found (%d)\n",
327 SSB_MAX_NR_CORES, bus->nr_devices);
328 goto err_unmap;
329 }
330 if (bus->bustype == SSB_BUSTYPE_SSB) {
331 /* Now that we know the number of cores,
332 * remap the whole IO space for all cores.
333 */
334 err = -ENOMEM;
335 iounmap(mmio);
336 mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices);
337 if (!mmio)
338 goto out;
339 bus->mmio = mmio;
340 }
341
342 /* Fetch basic information about each core/device */
343 for (i = 0, dev_i = 0; i < bus->nr_devices; i++) {
344 err = scan_switchcore(bus, i);
345 if (err)
346 goto err_unmap;
347 dev = &(bus->devices[dev_i]);
348
349 idhi = scan_read32(bus, i, SSB_IDHIGH);
350 dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
351 dev->id.revision = (idhi & SSB_IDHIGH_RCLO);
352 dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
353 dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT;
354 dev->core_index = i;
355 dev->bus = bus;
356 dev->ops = bus->ops;
357
358 pr_debug("Core %d found: %s (cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
359 i, ssb_core_name(dev->id.coreid),
360 dev->id.coreid, dev->id.revision, dev->id.vendor);
361
362 switch (dev->id.coreid) {
363 case SSB_DEV_80211:
364 nr_80211_cores++;
365 if (nr_80211_cores > 1) {
366 if (!we_support_multiple_80211_cores(bus)) {
367 pr_debug("Ignoring additional 802.11 core\n");
368 continue;
369 }
370 }
371 break;
372 case SSB_DEV_EXTIF:
373#ifdef CONFIG_SSB_DRIVER_EXTIF
374 if (bus->extif.dev) {
375 pr_warn("WARNING: Multiple EXTIFs found\n");
376 break;
377 }
378 bus->extif.dev = dev;
379#endif /* CONFIG_SSB_DRIVER_EXTIF */
380 break;
381 case SSB_DEV_CHIPCOMMON:
382 if (bus->chipco.dev) {
383 pr_warn("WARNING: Multiple ChipCommon found\n");
384 break;
385 }
386 bus->chipco.dev = dev;
387 break;
388 case SSB_DEV_MIPS:
389 case SSB_DEV_MIPS_3302:
390#ifdef CONFIG_SSB_DRIVER_MIPS
391 if (bus->mipscore.dev) {
392 pr_warn("WARNING: Multiple MIPS cores found\n");
393 break;
394 }
395 bus->mipscore.dev = dev;
396#endif /* CONFIG_SSB_DRIVER_MIPS */
397 break;
398 case SSB_DEV_PCI:
399 case SSB_DEV_PCIE:
400#ifdef CONFIG_SSB_DRIVER_PCICORE
401 if (bus->bustype == SSB_BUSTYPE_PCI) {
402 /* Ignore PCI cores on PCI-E cards.
403 * Ignore PCI-E cores on PCI cards. */
404 if (dev->id.coreid == SSB_DEV_PCI) {
405 if (pci_is_pcie(bus->host_pci))
406 continue;
407 } else {
408 if (!pci_is_pcie(bus->host_pci))
409 continue;
410 }
411 }
412 if (bus->pcicore.dev) {
413 pr_warn("WARNING: Multiple PCI(E) cores found\n");
414 break;
415 }
416 bus->pcicore.dev = dev;
417#endif /* CONFIG_SSB_DRIVER_PCICORE */
418 break;
419 case SSB_DEV_ETHERNET:
420 if (bus->bustype == SSB_BUSTYPE_PCI) {
421 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
422 (bus->host_pci->device & 0xFF00) == 0x4300) {
423 /* This is a dangling ethernet core on a
424 * wireless device. Ignore it. */
425 continue;
426 }
427 }
428 break;
429 default:
430 break;
431 }
432
433 dev_i++;
434 }
435 bus->nr_devices = dev_i;
436
437 err = 0;
438out:
439 return err;
440err_unmap:
441 ssb_iounmap(bus);
442 goto out;
443}
444