ssb: Look for SPROM at different offset on higher rev CC
[linux-2.6.git] / drivers / ssb / scan.c
1 /*
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
20 #include <pcmcia/cs_types.h>
21 #include <pcmcia/cs.h>
22 #include <pcmcia/cistpl.h>
23 #include <pcmcia/ds.h>
24
25 #include "ssb_private.h"
26
27
28 const char *ssb_core_name(u16 coreid)
29 {
30         switch (coreid) {
31         case SSB_DEV_CHIPCOMMON:
32                 return "ChipCommon";
33         case SSB_DEV_ILINE20:
34                 return "ILine 20";
35         case SSB_DEV_SDRAM:
36                 return "SDRAM";
37         case SSB_DEV_PCI:
38                 return "PCI";
39         case SSB_DEV_MIPS:
40                 return "MIPS";
41         case SSB_DEV_ETHERNET:
42                 return "Fast Ethernet";
43         case SSB_DEV_V90:
44                 return "V90";
45         case SSB_DEV_USB11_HOSTDEV:
46                 return "USB 1.1 Hostdev";
47         case SSB_DEV_ADSL:
48                 return "ADSL";
49         case SSB_DEV_ILINE100:
50                 return "ILine 100";
51         case SSB_DEV_IPSEC:
52                 return "IPSEC";
53         case SSB_DEV_PCMCIA:
54                 return "PCMCIA";
55         case SSB_DEV_INTERNAL_MEM:
56                 return "Internal Memory";
57         case SSB_DEV_MEMC_SDRAM:
58                 return "MEMC SDRAM";
59         case SSB_DEV_EXTIF:
60                 return "EXTIF";
61         case SSB_DEV_80211:
62                 return "IEEE 802.11";
63         case SSB_DEV_MIPS_3302:
64                 return "MIPS 3302";
65         case SSB_DEV_USB11_HOST:
66                 return "USB 1.1 Host";
67         case SSB_DEV_USB11_DEV:
68                 return "USB 1.1 Device";
69         case SSB_DEV_USB20_HOST:
70                 return "USB 2.0 Host";
71         case SSB_DEV_USB20_DEV:
72                 return "USB 2.0 Device";
73         case SSB_DEV_SDIO_HOST:
74                 return "SDIO Host";
75         case SSB_DEV_ROBOSWITCH:
76                 return "Roboswitch";
77         case SSB_DEV_PARA_ATA:
78                 return "PATA";
79         case SSB_DEV_SATA_XORDMA:
80                 return "SATA XOR-DMA";
81         case SSB_DEV_ETHERNET_GBIT:
82                 return "GBit Ethernet";
83         case SSB_DEV_PCIE:
84                 return "PCI-E";
85         case SSB_DEV_MIMO_PHY:
86                 return "MIMO PHY";
87         case SSB_DEV_SRAM_CTRLR:
88                 return "SRAM Controller";
89         case SSB_DEV_MINI_MACPHY:
90                 return "Mini MACPHY";
91         case SSB_DEV_ARM_1176:
92                 return "ARM 1176";
93         case SSB_DEV_ARM_7TDMI:
94                 return "ARM 7TDMI";
95         }
96         return "UNKNOWN";
97 }
98
99 static 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                 ssb_printk(KERN_ERR PFX
129                            "PCI-ID not in fallback list\n");
130         }
131
132         return chipid_fallback;
133 }
134
135 static u8 chipid_to_nrcores(u16 chipid)
136 {
137         switch (chipid) {
138         case 0x5365:
139                 return 7;
140         case 0x4306:
141                 return 6;
142         case 0x4310:
143                 return 8;
144         case 0x4307:
145         case 0x4301:
146                 return 5;
147         case 0x4401:
148         case 0x4402:
149                 return 3;
150         case 0x4710:
151         case 0x4610:
152         case 0x4704:
153                 return 9;
154         default:
155                 ssb_printk(KERN_ERR PFX
156                            "CHIPID not in nrcores fallback list\n");
157         }
158
159         return 1;
160 }
161
162 static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
163                        u16 offset)
164 {
165         u32 lo, hi;
166
167         switch (bus->bustype) {
168         case SSB_BUSTYPE_SSB:
169                 offset += current_coreidx * SSB_CORE_SIZE;
170                 break;
171         case SSB_BUSTYPE_PCI:
172                 break;
173         case SSB_BUSTYPE_PCMCIA:
174                 if (offset >= 0x800) {
175                         ssb_pcmcia_switch_segment(bus, 1);
176                         offset -= 0x800;
177                 } else
178                         ssb_pcmcia_switch_segment(bus, 0);
179                 lo = readw(bus->mmio + offset);
180                 hi = readw(bus->mmio + offset + 2);
181                 return lo | (hi << 16);
182         case SSB_BUSTYPE_SDIO:
183                 offset += current_coreidx * SSB_CORE_SIZE;
184                 return ssb_sdio_scan_read32(bus, offset);
185         }
186         return readl(bus->mmio + offset);
187 }
188
189 static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
190 {
191         switch (bus->bustype) {
192         case SSB_BUSTYPE_SSB:
193                 break;
194         case SSB_BUSTYPE_PCI:
195                 return ssb_pci_switch_coreidx(bus, coreidx);
196         case SSB_BUSTYPE_PCMCIA:
197                 return ssb_pcmcia_switch_coreidx(bus, coreidx);
198         case SSB_BUSTYPE_SDIO:
199                 return ssb_sdio_scan_switch_coreidx(bus, coreidx);
200         }
201         return 0;
202 }
203
204 void ssb_iounmap(struct ssb_bus *bus)
205 {
206         switch (bus->bustype) {
207         case SSB_BUSTYPE_SSB:
208         case SSB_BUSTYPE_PCMCIA:
209                 iounmap(bus->mmio);
210                 break;
211         case SSB_BUSTYPE_PCI:
212 #ifdef CONFIG_SSB_PCIHOST
213                 pci_iounmap(bus->host_pci, bus->mmio);
214 #else
215                 SSB_BUG_ON(1); /* Can't reach this code. */
216 #endif
217                 break;
218         case SSB_BUSTYPE_SDIO:
219                 break;
220         }
221         bus->mmio = NULL;
222         bus->mapped_device = NULL;
223 }
224
225 static void __iomem *ssb_ioremap(struct ssb_bus *bus,
226                                  unsigned long baseaddr)
227 {
228         void __iomem *mmio = NULL;
229
230         switch (bus->bustype) {
231         case SSB_BUSTYPE_SSB:
232                 /* Only map the first core for now. */
233                 /* fallthrough... */
234         case SSB_BUSTYPE_PCMCIA:
235                 mmio = ioremap(baseaddr, SSB_CORE_SIZE);
236                 break;
237         case SSB_BUSTYPE_PCI:
238 #ifdef CONFIG_SSB_PCIHOST
239                 mmio = pci_iomap(bus->host_pci, 0, ~0UL);
240 #else
241                 SSB_BUG_ON(1); /* Can't reach this code. */
242 #endif
243                 break;
244         case SSB_BUSTYPE_SDIO:
245                 /* Nothing to ioremap in the SDIO case, just fake it */
246                 mmio = (void __iomem *)baseaddr;
247                 break;
248         }
249
250         return mmio;
251 }
252
253 static int we_support_multiple_80211_cores(struct ssb_bus *bus)
254 {
255         /* More than one 802.11 core is only supported by special chips.
256          * There are chips with two 802.11 cores, but with dangling
257          * pins on the second core. Be careful and reject them here.
258          */
259
260 #ifdef CONFIG_SSB_PCIHOST
261         if (bus->bustype == SSB_BUSTYPE_PCI) {
262                 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
263                     bus->host_pci->device == 0x4324)
264                         return 1;
265         }
266 #endif /* CONFIG_SSB_PCIHOST */
267         return 0;
268 }
269
270 int ssb_bus_scan(struct ssb_bus *bus,
271                  unsigned long baseaddr)
272 {
273         int err = -ENOMEM;
274         void __iomem *mmio;
275         u32 idhi, cc, rev, tmp;
276         int dev_i, i;
277         struct ssb_device *dev;
278         int nr_80211_cores = 0;
279
280         mmio = ssb_ioremap(bus, baseaddr);
281         if (!mmio)
282                 goto out;
283         bus->mmio = mmio;
284
285         err = scan_switchcore(bus, 0); /* Switch to first core */
286         if (err)
287                 goto err_unmap;
288
289         idhi = scan_read32(bus, 0, SSB_IDHIGH);
290         cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
291         rev = (idhi & SSB_IDHIGH_RCLO);
292         rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
293
294         bus->nr_devices = 0;
295         if (cc == SSB_DEV_CHIPCOMMON) {
296                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID);
297
298                 bus->chip_id = (tmp & SSB_CHIPCO_IDMASK);
299                 bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >>
300                                 SSB_CHIPCO_REVSHIFT;
301                 bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >>
302                                     SSB_CHIPCO_PACKSHIFT;
303                 if (rev >= 4) {
304                         bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >>
305                                           SSB_CHIPCO_NRCORESSHIFT;
306                 }
307                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP);
308                 bus->chipco.capabilities = tmp;
309         } else {
310                 if (bus->bustype == SSB_BUSTYPE_PCI) {
311                         bus->chip_id = pcidev_to_chipid(bus->host_pci);
312                         pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
313                                              &bus->chip_rev);
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 (bus->host_pci->is_pcie)
411                                                 continue;
412                                 } else {
413                                         if (!bus->host_pci->is_pcie)
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                 default:
426                         break;
427                 }
428
429                 dev_i++;
430         }
431         bus->nr_devices = dev_i;
432
433         err = 0;
434 out:
435         return err;
436 err_unmap:
437         ssb_iounmap(bus);
438         goto out;
439 }