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Michael Buesch61e115a2007-09-18 15:12:50 -04001/*
2 * Sonics Silicon Backplane
3 * Bus scanning
4 *
5 * Copyright (C) 2005-2007 Michael Buesch <mb@bu3sch.de>
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 <linux/ssb/ssb.h>
16#include <linux/ssb/ssb_regs.h>
17#include <linux/pci.h>
18#include <linux/io.h>
19
Michael Buesch61e115a2007-09-18 15:12:50 -040020#include <pcmcia/cistpl.h>
21#include <pcmcia/ds.h>
22
23#include "ssb_private.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 }
94 return "UNKNOWN";
95}
96
97static u16 pcidev_to_chipid(struct pci_dev *pci_dev)
98{
99 u16 chipid_fallback = 0;
100
101 switch (pci_dev->device) {
102 case 0x4301:
103 chipid_fallback = 0x4301;
104 break;
105 case 0x4305 ... 0x4307:
106 chipid_fallback = 0x4307;
107 break;
108 case 0x4403:
109 chipid_fallback = 0x4402;
110 break;
111 case 0x4610 ... 0x4615:
112 chipid_fallback = 0x4610;
113 break;
114 case 0x4710 ... 0x4715:
115 chipid_fallback = 0x4710;
116 break;
117 case 0x4320 ... 0x4325:
118 chipid_fallback = 0x4309;
119 break;
120 case PCI_DEVICE_ID_BCM4401:
121 case PCI_DEVICE_ID_BCM4401B0:
122 case PCI_DEVICE_ID_BCM4401B1:
123 chipid_fallback = 0x4401;
124 break;
125 default:
126 ssb_printk(KERN_ERR PFX
127 "PCI-ID not in fallback list\n");
128 }
129
130 return chipid_fallback;
131}
132
133static u8 chipid_to_nrcores(u16 chipid)
134{
135 switch (chipid) {
136 case 0x5365:
137 return 7;
138 case 0x4306:
139 return 6;
140 case 0x4310:
141 return 8;
142 case 0x4307:
143 case 0x4301:
144 return 5;
145 case 0x4401:
146 case 0x4402:
147 return 3;
148 case 0x4710:
149 case 0x4610:
150 case 0x4704:
151 return 9;
152 default:
153 ssb_printk(KERN_ERR PFX
154 "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{
Martin Fuzzeyd8e23522009-11-06 21:21:27 +0100163 u32 lo, hi;
164
Michael Buesch61e115a2007-09-18 15:12:50 -0400165 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);
Martin Fuzzeyd8e23522009-11-06 21:21:27 +0100177 lo = readw(bus->mmio + offset);
178 hi = readw(bus->mmio + offset + 2);
179 return lo | (hi << 16);
Albert Herranz24ea6022009-09-08 19:30:12 +0200180 case SSB_BUSTYPE_SDIO:
181 offset += current_coreidx * SSB_CORE_SIZE;
182 return ssb_sdio_scan_read32(bus, offset);
Michael Buesch61e115a2007-09-18 15:12:50 -0400183 }
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);
Albert Herranz24ea6022009-09-08 19:30:12 +0200196 case SSB_BUSTYPE_SDIO:
197 return ssb_sdio_scan_switch_coreidx(bus, coreidx);
Michael Buesch61e115a2007-09-18 15:12:50 -0400198 }
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 SSB_BUG_ON(1); /* Can't reach this code. */
214#endif
215 break;
Albert Herranz24ea6022009-09-08 19:30:12 +0200216 case SSB_BUSTYPE_SDIO:
217 break;
Michael Buesch61e115a2007-09-18 15:12:50 -0400218 }
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 SSB_BUG_ON(1); /* Can't reach this code. */
240#endif
241 break;
Albert Herranz24ea6022009-09-08 19:30:12 +0200242 case SSB_BUSTYPE_SDIO:
243 /* Nothing to ioremap in the SDIO case, just fake it */
244 mmio = (void __iomem *)baseaddr;
245 break;
Michael Buesch61e115a2007-09-18 15:12:50 -0400246 }
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 &&
Rafał Miłecki9fcce612011-05-08 20:30:31 +0200261 ((bus->host_pci->device == 0x4313) ||
262 (bus->host_pci->device == 0x431A) ||
263 (bus->host_pci->device == 0x4321) ||
264 (bus->host_pci->device == 0x4324)))
Michael Buesch61e115a2007-09-18 15:12:50 -0400265 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);
Rafał Miłeckice57d9e2011-04-01 12:06:48 +0200313 pci_read_config_byte(bus->host_pci, PCI_REVISION_ID,
Michael Buesch61e115a2007-09-18 15:12:50 -0400314 &bus->chip_rev);
315 bus->chip_package = 0;
316 } else {
317 bus->chip_id = 0x4710;
318 bus->chip_rev = 0;
319 bus->chip_package = 0;
320 }
321 }
322 if (!bus->nr_devices)
323 bus->nr_devices = chipid_to_nrcores(bus->chip_id);
324 if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
325 ssb_printk(KERN_ERR PFX
326 "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
Larry Fingerac2752c2009-11-19 14:40:46 -0600358 printk(KERN_DEBUG PFX
Michael Buesch61e115a2007-09-18 15:12:50 -0400359 "Core %d found: %s "
360 "(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
361 i, ssb_core_name(dev->id.coreid),
362 dev->id.coreid, dev->id.revision, dev->id.vendor);
363
364 switch (dev->id.coreid) {
365 case SSB_DEV_80211:
366 nr_80211_cores++;
367 if (nr_80211_cores > 1) {
368 if (!we_support_multiple_80211_cores(bus)) {
369 ssb_dprintk(KERN_INFO PFX "Ignoring additional "
370 "802.11 core\n");
371 continue;
372 }
373 }
374 break;
375 case SSB_DEV_EXTIF:
376#ifdef CONFIG_SSB_DRIVER_EXTIF
377 if (bus->extif.dev) {
378 ssb_printk(KERN_WARNING PFX
379 "WARNING: Multiple EXTIFs found\n");
380 break;
381 }
382 bus->extif.dev = dev;
383#endif /* CONFIG_SSB_DRIVER_EXTIF */
384 break;
385 case SSB_DEV_CHIPCOMMON:
386 if (bus->chipco.dev) {
387 ssb_printk(KERN_WARNING PFX
388 "WARNING: Multiple ChipCommon found\n");
389 break;
390 }
391 bus->chipco.dev = dev;
392 break;
393 case SSB_DEV_MIPS:
394 case SSB_DEV_MIPS_3302:
395#ifdef CONFIG_SSB_DRIVER_MIPS
396 if (bus->mipscore.dev) {
397 ssb_printk(KERN_WARNING PFX
398 "WARNING: Multiple MIPS cores found\n");
399 break;
400 }
401 bus->mipscore.dev = dev;
402#endif /* CONFIG_SSB_DRIVER_MIPS */
403 break;
404 case SSB_DEV_PCI:
405 case SSB_DEV_PCIE:
406#ifdef CONFIG_SSB_DRIVER_PCICORE
Michael Buesch87c4ac82008-01-03 18:59:25 +0100407 if (bus->bustype == SSB_BUSTYPE_PCI) {
408 /* Ignore PCI cores on PCI-E cards.
409 * Ignore PCI-E cores on PCI cards. */
410 if (dev->id.coreid == SSB_DEV_PCI) {
Hauke Mehrtens6b740aa2010-12-21 02:01:52 +0100411 if (pci_is_pcie(bus->host_pci))
Michael Buesch87c4ac82008-01-03 18:59:25 +0100412 continue;
413 } else {
Hauke Mehrtens6b740aa2010-12-21 02:01:52 +0100414 if (!pci_is_pcie(bus->host_pci))
Michael Buesch87c4ac82008-01-03 18:59:25 +0100415 continue;
416 }
417 }
Michael Buesch61e115a2007-09-18 15:12:50 -0400418 if (bus->pcicore.dev) {
419 ssb_printk(KERN_WARNING PFX
420 "WARNING: Multiple PCI(E) cores found\n");
421 break;
422 }
423 bus->pcicore.dev = dev;
424#endif /* CONFIG_SSB_DRIVER_PCICORE */
425 break;
Michael Büsched70c6e2011-01-07 19:48:05 +0100426 case SSB_DEV_ETHERNET:
427 if (bus->bustype == SSB_BUSTYPE_PCI) {
428 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
429 (bus->host_pci->device & 0xFF00) == 0x4300) {
430 /* This is a dangling ethernet core on a
431 * wireless device. Ignore it. */
432 continue;
433 }
434 }
435 break;
Michael Buesch61e115a2007-09-18 15:12:50 -0400436 default:
437 break;
438 }
439
440 dev_i++;
441 }
442 bus->nr_devices = dev_i;
443
444 err = 0;
445out:
446 return err;
447err_unmap:
448 ssb_iounmap(bus);
449 goto out;
450}