Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / ssb / scan.c
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 <linux/ssb/ssb.h>
16 #include <linux/ssb/ssb_regs.h>
17 #include <linux/pci.h>
18 #include <linux/io.h>
19
20 #include <pcmcia/cistpl.h>
21 #include <pcmcia/ds.h>
22
23 #include "ssb_private.h"
24
25
26 const 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
97 static 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
133 static 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
160 static 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
187 static 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
202 void 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;
216         case SSB_BUSTYPE_SDIO:
217                 break;
218         }
219         bus->mmio = NULL;
220         bus->mapped_device = NULL;
221 }
222
223 static 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;
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
251 static 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
271 int 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         if (!bus->nr_devices)
322                 bus->nr_devices = chipid_to_nrcores(bus->chip_id);
323         if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
324                 ssb_printk(KERN_ERR PFX
325                            "More than %d ssb cores found (%d)\n",
326                            SSB_MAX_NR_CORES, bus->nr_devices);
327                 goto err_unmap;
328         }
329         if (bus->bustype == SSB_BUSTYPE_SSB) {
330                 /* Now that we know the number of cores,
331                  * remap the whole IO space for all cores.
332                  */
333                 err = -ENOMEM;
334                 iounmap(mmio);
335                 mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices);
336                 if (!mmio)
337                         goto out;
338                 bus->mmio = mmio;
339         }
340
341         /* Fetch basic information about each core/device */
342         for (i = 0, dev_i = 0; i < bus->nr_devices; i++) {
343                 err = scan_switchcore(bus, i);
344                 if (err)
345                         goto err_unmap;
346                 dev = &(bus->devices[dev_i]);
347
348                 idhi = scan_read32(bus, i, SSB_IDHIGH);
349                 dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
350                 dev->id.revision = (idhi & SSB_IDHIGH_RCLO);
351                 dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
352                 dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT;
353                 dev->core_index = i;
354                 dev->bus = bus;
355                 dev->ops = bus->ops;
356
357                 printk(KERN_DEBUG PFX
358                             "Core %d found: %s "
359                             "(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
360                             i, ssb_core_name(dev->id.coreid),
361                             dev->id.coreid, dev->id.revision, dev->id.vendor);
362
363                 switch (dev->id.coreid) {
364                 case SSB_DEV_80211:
365                         nr_80211_cores++;
366                         if (nr_80211_cores > 1) {
367                                 if (!we_support_multiple_80211_cores(bus)) {
368                                         ssb_dprintk(KERN_INFO PFX "Ignoring additional "
369                                                     "802.11 core\n");
370                                         continue;
371                                 }
372                         }
373                         break;
374                 case SSB_DEV_EXTIF:
375 #ifdef CONFIG_SSB_DRIVER_EXTIF
376                         if (bus->extif.dev) {
377                                 ssb_printk(KERN_WARNING PFX
378                                            "WARNING: Multiple EXTIFs found\n");
379                                 break;
380                         }
381                         bus->extif.dev = dev;
382 #endif /* CONFIG_SSB_DRIVER_EXTIF */
383                         break;
384                 case SSB_DEV_CHIPCOMMON:
385                         if (bus->chipco.dev) {
386                                 ssb_printk(KERN_WARNING PFX
387                                            "WARNING: Multiple ChipCommon found\n");
388                                 break;
389                         }
390                         bus->chipco.dev = dev;
391                         break;
392                 case SSB_DEV_MIPS:
393                 case SSB_DEV_MIPS_3302:
394 #ifdef CONFIG_SSB_DRIVER_MIPS
395                         if (bus->mipscore.dev) {
396                                 ssb_printk(KERN_WARNING PFX
397                                            "WARNING: Multiple MIPS cores found\n");
398                                 break;
399                         }
400                         bus->mipscore.dev = dev;
401 #endif /* CONFIG_SSB_DRIVER_MIPS */
402                         break;
403                 case SSB_DEV_PCI:
404                 case SSB_DEV_PCIE:
405 #ifdef CONFIG_SSB_DRIVER_PCICORE
406                         if (bus->bustype == SSB_BUSTYPE_PCI) {
407                                 /* Ignore PCI cores on PCI-E cards.
408                                  * Ignore PCI-E cores on PCI cards. */
409                                 if (dev->id.coreid == SSB_DEV_PCI) {
410                                         if (pci_is_pcie(bus->host_pci))
411                                                 continue;
412                                 } else {
413                                         if (!pci_is_pcie(bus->host_pci))
414                                                 continue;
415                                 }
416                         }
417                         if (bus->pcicore.dev) {
418                                 ssb_printk(KERN_WARNING PFX
419                                            "WARNING: Multiple PCI(E) cores found\n");
420                                 break;
421                         }
422                         bus->pcicore.dev = dev;
423 #endif /* CONFIG_SSB_DRIVER_PCICORE */
424                         break;
425                 case SSB_DEV_ETHERNET:
426                         if (bus->bustype == SSB_BUSTYPE_PCI) {
427                                 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
428                                     (bus->host_pci->device & 0xFF00) == 0x4300) {
429                                         /* This is a dangling ethernet core on a
430                                          * wireless device. Ignore it. */
431                                         continue;
432                                 }
433                         }
434                         break;
435                 default:
436                         break;
437                 }
438
439                 dev_i++;
440         }
441         bus->nr_devices = dev_i;
442
443         err = 0;
444 out:
445         return err;
446 err_unmap:
447         ssb_iounmap(bus);
448         goto out;
449 }