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pci_sabre.c
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1 /* pci_sabre.c: Sabre specific PCI controller support.
2  *
3  * Copyright (C) 1997, 1998, 1999, 2007 David S. Miller ([email protected])
4  * Copyright (C) 1998, 1999 Eddie C. Dost ([email protected])
5  * Copyright (C) 1999 Jakub Jelinek ([email protected])
6  */
7 
8 #include <linux/kernel.h>
9 #include <linux/types.h>
10 #include <linux/pci.h>
11 #include <linux/init.h>
12 #include <linux/export.h>
13 #include <linux/slab.h>
14 #include <linux/interrupt.h>
15 #include <linux/of_device.h>
16 
17 #include <asm/apb.h>
18 #include <asm/iommu.h>
19 #include <asm/irq.h>
20 #include <asm/prom.h>
21 #include <asm/upa.h>
22 
23 #include "pci_impl.h"
24 #include "iommu_common.h"
25 #include "psycho_common.h"
26 
27 #define DRIVER_NAME "sabre"
28 #define PFX DRIVER_NAME ": "
29 
30 /* SABRE PCI controller register offsets and definitions. */
31 #define SABRE_UE_AFSR 0x0030UL
32 #define SABRE_UEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */
33 #define SABRE_UEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */
34 #define SABRE_UEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */
35 #define SABRE_UEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */
36 #define SABRE_UEAFSR_SDTE 0x0200000000000000UL /* Secondary DMA Translation Error */
37 #define SABRE_UEAFSR_PDTE 0x0100000000000000UL /* Primary DMA Translation Error */
38 #define SABRE_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */
39 #define SABRE_UEAFSR_OFF 0x00000000e0000000UL /* Offset (AFAR bits [5:3] */
40 #define SABRE_UEAFSR_BLK 0x0000000000800000UL /* Was block operation */
41 #define SABRE_UECE_AFAR 0x0038UL
42 #define SABRE_CE_AFSR 0x0040UL
43 #define SABRE_CEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */
44 #define SABRE_CEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */
45 #define SABRE_CEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */
46 #define SABRE_CEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */
47 #define SABRE_CEAFSR_ESYND 0x00ff000000000000UL /* ECC Syndrome */
48 #define SABRE_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */
49 #define SABRE_CEAFSR_OFF 0x00000000e0000000UL /* Offset */
50 #define SABRE_CEAFSR_BLK 0x0000000000800000UL /* Was block operation */
51 #define SABRE_UECE_AFAR_ALIAS 0x0048UL /* Aliases to 0x0038 */
52 #define SABRE_IOMMU_CONTROL 0x0200UL
53 #define SABRE_IOMMUCTRL_ERRSTS 0x0000000006000000UL /* Error status bits */
54 #define SABRE_IOMMUCTRL_ERR 0x0000000001000000UL /* Error present in IOTLB */
55 #define SABRE_IOMMUCTRL_LCKEN 0x0000000000800000UL /* IOTLB lock enable */
56 #define SABRE_IOMMUCTRL_LCKPTR 0x0000000000780000UL /* IOTLB lock pointer */
57 #define SABRE_IOMMUCTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
58 #define SABRE_IOMMU_TSBSZ_1K 0x0000000000000000
59 #define SABRE_IOMMU_TSBSZ_2K 0x0000000000010000
60 #define SABRE_IOMMU_TSBSZ_4K 0x0000000000020000
61 #define SABRE_IOMMU_TSBSZ_8K 0x0000000000030000
62 #define SABRE_IOMMU_TSBSZ_16K 0x0000000000040000
63 #define SABRE_IOMMU_TSBSZ_32K 0x0000000000050000
64 #define SABRE_IOMMU_TSBSZ_64K 0x0000000000060000
65 #define SABRE_IOMMU_TSBSZ_128K 0x0000000000070000
66 #define SABRE_IOMMUCTRL_TBWSZ 0x0000000000000004UL /* TSB assumed page size */
67 #define SABRE_IOMMUCTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
68 #define SABRE_IOMMUCTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
69 #define SABRE_IOMMU_TSBBASE 0x0208UL
70 #define SABRE_IOMMU_FLUSH 0x0210UL
71 #define SABRE_IMAP_A_SLOT0 0x0c00UL
72 #define SABRE_IMAP_B_SLOT0 0x0c20UL
73 #define SABRE_IMAP_SCSI 0x1000UL
74 #define SABRE_IMAP_ETH 0x1008UL
75 #define SABRE_IMAP_BPP 0x1010UL
76 #define SABRE_IMAP_AU_REC 0x1018UL
77 #define SABRE_IMAP_AU_PLAY 0x1020UL
78 #define SABRE_IMAP_PFAIL 0x1028UL
79 #define SABRE_IMAP_KMS 0x1030UL
80 #define SABRE_IMAP_FLPY 0x1038UL
81 #define SABRE_IMAP_SHW 0x1040UL
82 #define SABRE_IMAP_KBD 0x1048UL
83 #define SABRE_IMAP_MS 0x1050UL
84 #define SABRE_IMAP_SER 0x1058UL
85 #define SABRE_IMAP_UE 0x1070UL
86 #define SABRE_IMAP_CE 0x1078UL
87 #define SABRE_IMAP_PCIERR 0x1080UL
88 #define SABRE_IMAP_GFX 0x1098UL
89 #define SABRE_IMAP_EUPA 0x10a0UL
90 #define SABRE_ICLR_A_SLOT0 0x1400UL
91 #define SABRE_ICLR_B_SLOT0 0x1480UL
92 #define SABRE_ICLR_SCSI 0x1800UL
93 #define SABRE_ICLR_ETH 0x1808UL
94 #define SABRE_ICLR_BPP 0x1810UL
95 #define SABRE_ICLR_AU_REC 0x1818UL
96 #define SABRE_ICLR_AU_PLAY 0x1820UL
97 #define SABRE_ICLR_PFAIL 0x1828UL
98 #define SABRE_ICLR_KMS 0x1830UL
99 #define SABRE_ICLR_FLPY 0x1838UL
100 #define SABRE_ICLR_SHW 0x1840UL
101 #define SABRE_ICLR_KBD 0x1848UL
102 #define SABRE_ICLR_MS 0x1850UL
103 #define SABRE_ICLR_SER 0x1858UL
104 #define SABRE_ICLR_UE 0x1870UL
105 #define SABRE_ICLR_CE 0x1878UL
106 #define SABRE_ICLR_PCIERR 0x1880UL
107 #define SABRE_WRSYNC 0x1c20UL
108 #define SABRE_PCICTRL 0x2000UL
109 #define SABRE_PCICTRL_MRLEN 0x0000001000000000UL /* Use MemoryReadLine for block loads/stores */
110 #define SABRE_PCICTRL_SERR 0x0000000400000000UL /* Set when SERR asserted on PCI bus */
111 #define SABRE_PCICTRL_ARBPARK 0x0000000000200000UL /* Bus Parking 0=Ultra-IIi 1=prev-bus-owner */
112 #define SABRE_PCICTRL_CPUPRIO 0x0000000000100000UL /* Ultra-IIi granted every other bus cycle */
113 #define SABRE_PCICTRL_ARBPRIO 0x00000000000f0000UL /* Slot which is granted every other bus cycle */
114 #define SABRE_PCICTRL_ERREN 0x0000000000000100UL /* PCI Error Interrupt Enable */
115 #define SABRE_PCICTRL_RTRYWE 0x0000000000000080UL /* DMA Flow Control 0=wait-if-possible 1=retry */
116 #define SABRE_PCICTRL_AEN 0x000000000000000fUL /* Slot PCI arbitration enables */
117 #define SABRE_PIOAFSR 0x2010UL
118 #define SABRE_PIOAFSR_PMA 0x8000000000000000UL /* Primary Master Abort */
119 #define SABRE_PIOAFSR_PTA 0x4000000000000000UL /* Primary Target Abort */
120 #define SABRE_PIOAFSR_PRTRY 0x2000000000000000UL /* Primary Excessive Retries */
121 #define SABRE_PIOAFSR_PPERR 0x1000000000000000UL /* Primary Parity Error */
122 #define SABRE_PIOAFSR_SMA 0x0800000000000000UL /* Secondary Master Abort */
123 #define SABRE_PIOAFSR_STA 0x0400000000000000UL /* Secondary Target Abort */
124 #define SABRE_PIOAFSR_SRTRY 0x0200000000000000UL /* Secondary Excessive Retries */
125 #define SABRE_PIOAFSR_SPERR 0x0100000000000000UL /* Secondary Parity Error */
126 #define SABRE_PIOAFSR_BMSK 0x0000ffff00000000UL /* Byte Mask */
127 #define SABRE_PIOAFSR_BLK 0x0000000080000000UL /* Was Block Operation */
128 #define SABRE_PIOAFAR 0x2018UL
129 #define SABRE_PCIDIAG 0x2020UL
130 #define SABRE_PCIDIAG_DRTRY 0x0000000000000040UL /* Disable PIO Retry Limit */
131 #define SABRE_PCIDIAG_IPAPAR 0x0000000000000008UL /* Invert PIO Address Parity */
132 #define SABRE_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO Data Parity */
133 #define SABRE_PCIDIAG_IDDPAR 0x0000000000000002UL /* Invert DMA Data Parity */
134 #define SABRE_PCIDIAG_ELPBK 0x0000000000000001UL /* Loopback Enable - not supported */
135 #define SABRE_PCITASR 0x2028UL
136 #define SABRE_PCITASR_EF 0x0000000000000080UL /* Respond to 0xe0000000-0xffffffff */
137 #define SABRE_PCITASR_CD 0x0000000000000040UL /* Respond to 0xc0000000-0xdfffffff */
138 #define SABRE_PCITASR_AB 0x0000000000000020UL /* Respond to 0xa0000000-0xbfffffff */
139 #define SABRE_PCITASR_89 0x0000000000000010UL /* Respond to 0x80000000-0x9fffffff */
140 #define SABRE_PCITASR_67 0x0000000000000008UL /* Respond to 0x60000000-0x7fffffff */
141 #define SABRE_PCITASR_45 0x0000000000000004UL /* Respond to 0x40000000-0x5fffffff */
142 #define SABRE_PCITASR_23 0x0000000000000002UL /* Respond to 0x20000000-0x3fffffff */
143 #define SABRE_PCITASR_01 0x0000000000000001UL /* Respond to 0x00000000-0x1fffffff */
144 #define SABRE_PIOBUF_DIAG 0x5000UL
145 #define SABRE_DMABUF_DIAGLO 0x5100UL
146 #define SABRE_DMABUF_DIAGHI 0x51c0UL
147 #define SABRE_IMAP_GFX_ALIAS 0x6000UL /* Aliases to 0x1098 */
148 #define SABRE_IMAP_EUPA_ALIAS 0x8000UL /* Aliases to 0x10a0 */
149 #define SABRE_IOMMU_VADIAG 0xa400UL
150 #define SABRE_IOMMU_TCDIAG 0xa408UL
151 #define SABRE_IOMMU_TAG 0xa580UL
152 #define SABRE_IOMMUTAG_ERRSTS 0x0000000001800000UL /* Error status bits */
153 #define SABRE_IOMMUTAG_ERR 0x0000000000400000UL /* Error present */
154 #define SABRE_IOMMUTAG_WRITE 0x0000000000200000UL /* Page is writable */
155 #define SABRE_IOMMUTAG_STREAM 0x0000000000100000UL /* Streamable bit - unused */
156 #define SABRE_IOMMUTAG_SIZE 0x0000000000080000UL /* 0=8k 1=16k */
157 #define SABRE_IOMMUTAG_VPN 0x000000000007ffffUL /* Virtual Page Number [31:13] */
158 #define SABRE_IOMMU_DATA 0xa600UL
159 #define SABRE_IOMMUDATA_VALID 0x0000000040000000UL /* Valid */
160 #define SABRE_IOMMUDATA_USED 0x0000000020000000UL /* Used (for LRU algorithm) */
161 #define SABRE_IOMMUDATA_CACHE 0x0000000010000000UL /* Cacheable */
162 #define SABRE_IOMMUDATA_PPN 0x00000000001fffffUL /* Physical Page Number [33:13] */
163 #define SABRE_PCI_IRQSTATE 0xa800UL
164 #define SABRE_OBIO_IRQSTATE 0xa808UL
165 #define SABRE_FFBCFG 0xf000UL
166 #define SABRE_FFBCFG_SPRQS 0x000000000f000000 /* Slave P_RQST queue size */
167 #define SABRE_FFBCFG_ONEREAD 0x0000000000004000 /* Slave supports one outstanding read */
168 #define SABRE_MCCTRL0 0xf010UL
169 #define SABRE_MCCTRL0_RENAB 0x0000000080000000 /* Refresh Enable */
170 #define SABRE_MCCTRL0_EENAB 0x0000000010000000 /* Enable all ECC functions */
171 #define SABRE_MCCTRL0_11BIT 0x0000000000001000 /* Enable 11-bit column addressing */
172 #define SABRE_MCCTRL0_DPP 0x0000000000000f00 /* DIMM Pair Present Bits */
173 #define SABRE_MCCTRL0_RINTVL 0x00000000000000ff /* Refresh Interval */
174 #define SABRE_MCCTRL1 0xf018UL
175 #define SABRE_MCCTRL1_AMDC 0x0000000038000000 /* Advance Memdata Clock */
176 #define SABRE_MCCTRL1_ARDC 0x0000000007000000 /* Advance DRAM Read Data Clock */
177 #define SABRE_MCCTRL1_CSR 0x0000000000e00000 /* CAS to RAS delay for CBR refresh */
178 #define SABRE_MCCTRL1_CASRW 0x00000000001c0000 /* CAS length for read/write */
179 #define SABRE_MCCTRL1_RCD 0x0000000000038000 /* RAS to CAS delay */
180 #define SABRE_MCCTRL1_CP 0x0000000000007000 /* CAS Precharge */
181 #define SABRE_MCCTRL1_RP 0x0000000000000e00 /* RAS Precharge */
182 #define SABRE_MCCTRL1_RAS 0x00000000000001c0 /* Length of RAS for refresh */
183 #define SABRE_MCCTRL1_CASRW2 0x0000000000000038 /* Must be same as CASRW */
184 #define SABRE_MCCTRL1_RSC 0x0000000000000007 /* RAS after CAS hold time */
185 #define SABRE_RESETCTRL 0xf020UL
186 
187 #define SABRE_CONFIGSPACE 0x001000000UL
188 #define SABRE_IOSPACE 0x002000000UL
189 #define SABRE_IOSPACE_SIZE 0x000ffffffUL
190 #define SABRE_MEMSPACE 0x100000000UL
191 #define SABRE_MEMSPACE_SIZE 0x07fffffffUL
192 
193 static int hummingbird_p;
194 static struct pci_bus *sabre_root_bus;
195 
196 static irqreturn_t sabre_ue_intr(int irq, void *dev_id)
197 {
198  struct pci_pbm_info *pbm = dev_id;
199  unsigned long afsr_reg = pbm->controller_regs + SABRE_UE_AFSR;
200  unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
201  unsigned long afsr, afar, error_bits;
202  int reported;
203 
204  /* Latch uncorrectable error status. */
205  afar = upa_readq(afar_reg);
206  afsr = upa_readq(afsr_reg);
207 
208  /* Clear the primary/secondary error status bits. */
209  error_bits = afsr &
210  (SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
211  SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
212  SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE);
213  if (!error_bits)
214  return IRQ_NONE;
215  upa_writeq(error_bits, afsr_reg);
216 
217  /* Log the error. */
218  printk("%s: Uncorrectable Error, primary error type[%s%s]\n",
219  pbm->name,
220  ((error_bits & SABRE_UEAFSR_PDRD) ?
221  "DMA Read" :
222  ((error_bits & SABRE_UEAFSR_PDWR) ?
223  "DMA Write" : "???")),
224  ((error_bits & SABRE_UEAFSR_PDTE) ?
225  ":Translation Error" : ""));
226  printk("%s: bytemask[%04lx] dword_offset[%lx] was_block(%d)\n",
227  pbm->name,
228  (afsr & SABRE_UEAFSR_BMSK) >> 32UL,
229  (afsr & SABRE_UEAFSR_OFF) >> 29UL,
230  ((afsr & SABRE_UEAFSR_BLK) ? 1 : 0));
231  printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
232  printk("%s: UE Secondary errors [", pbm->name);
233  reported = 0;
234  if (afsr & SABRE_UEAFSR_SDRD) {
235  reported++;
236  printk("(DMA Read)");
237  }
238  if (afsr & SABRE_UEAFSR_SDWR) {
239  reported++;
240  printk("(DMA Write)");
241  }
242  if (afsr & SABRE_UEAFSR_SDTE) {
243  reported++;
244  printk("(Translation Error)");
245  }
246  if (!reported)
247  printk("(none)");
248  printk("]\n");
249 
250  /* Interrogate IOMMU for error status. */
251  psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
252 
253  return IRQ_HANDLED;
254 }
255 
256 static irqreturn_t sabre_ce_intr(int irq, void *dev_id)
257 {
258  struct pci_pbm_info *pbm = dev_id;
259  unsigned long afsr_reg = pbm->controller_regs + SABRE_CE_AFSR;
260  unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
261  unsigned long afsr, afar, error_bits;
262  int reported;
263 
264  /* Latch error status. */
265  afar = upa_readq(afar_reg);
266  afsr = upa_readq(afsr_reg);
267 
268  /* Clear primary/secondary error status bits. */
269  error_bits = afsr &
270  (SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
271  SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR);
272  if (!error_bits)
273  return IRQ_NONE;
274  upa_writeq(error_bits, afsr_reg);
275 
276  /* Log the error. */
277  printk("%s: Correctable Error, primary error type[%s]\n",
278  pbm->name,
279  ((error_bits & SABRE_CEAFSR_PDRD) ?
280  "DMA Read" :
281  ((error_bits & SABRE_CEAFSR_PDWR) ?
282  "DMA Write" : "???")));
283 
284  /* XXX Use syndrome and afar to print out module string just like
285  * XXX UDB CE trap handler does... -DaveM
286  */
287  printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
288  "was_block(%d)\n",
289  pbm->name,
290  (afsr & SABRE_CEAFSR_ESYND) >> 48UL,
291  (afsr & SABRE_CEAFSR_BMSK) >> 32UL,
292  (afsr & SABRE_CEAFSR_OFF) >> 29UL,
293  ((afsr & SABRE_CEAFSR_BLK) ? 1 : 0));
294  printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
295  printk("%s: CE Secondary errors [", pbm->name);
296  reported = 0;
297  if (afsr & SABRE_CEAFSR_SDRD) {
298  reported++;
299  printk("(DMA Read)");
300  }
301  if (afsr & SABRE_CEAFSR_SDWR) {
302  reported++;
303  printk("(DMA Write)");
304  }
305  if (!reported)
306  printk("(none)");
307  printk("]\n");
308 
309  return IRQ_HANDLED;
310 }
311 
312 static void sabre_register_error_handlers(struct pci_pbm_info *pbm)
313 {
314  struct device_node *dp = pbm->op->dev.of_node;
315  struct platform_device *op;
316  unsigned long base = pbm->controller_regs;
317  u64 tmp;
318  int err;
319 
320  if (pbm->chip_type == PBM_CHIP_TYPE_SABRE)
321  dp = dp->parent;
322 
323  op = of_find_device_by_node(dp);
324  if (!op)
325  return;
326 
327  /* Sabre/Hummingbird IRQ property layout is:
328  * 0: PCI ERR
329  * 1: UE ERR
330  * 2: CE ERR
331  * 3: POWER FAIL
332  */
333  if (op->archdata.num_irqs < 4)
334  return;
335 
336  /* We clear the error bits in the appropriate AFSR before
337  * registering the handler so that we don't get spurious
338  * interrupts.
339  */
340  upa_writeq((SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
341  SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
342  SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE),
343  base + SABRE_UE_AFSR);
344 
345  err = request_irq(op->archdata.irqs[1], sabre_ue_intr, 0, "SABRE_UE", pbm);
346  if (err)
347  printk(KERN_WARNING "%s: Couldn't register UE, err=%d.\n",
348  pbm->name, err);
349 
350  upa_writeq((SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
351  SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR),
352  base + SABRE_CE_AFSR);
353 
354 
355  err = request_irq(op->archdata.irqs[2], sabre_ce_intr, 0, "SABRE_CE", pbm);
356  if (err)
357  printk(KERN_WARNING "%s: Couldn't register CE, err=%d.\n",
358  pbm->name, err);
359  err = request_irq(op->archdata.irqs[0], psycho_pcierr_intr, 0,
360  "SABRE_PCIERR", pbm);
361  if (err)
362  printk(KERN_WARNING "%s: Couldn't register PCIERR, err=%d.\n",
363  pbm->name, err);
364 
365  tmp = upa_readq(base + SABRE_PCICTRL);
366  tmp |= SABRE_PCICTRL_ERREN;
367  upa_writeq(tmp, base + SABRE_PCICTRL);
368 }
369 
370 static void apb_init(struct pci_bus *sabre_bus)
371 {
372  struct pci_dev *pdev;
373 
374  list_for_each_entry(pdev, &sabre_bus->devices, bus_list) {
375  if (pdev->vendor == PCI_VENDOR_ID_SUN &&
376  pdev->device == PCI_DEVICE_ID_SUN_SIMBA) {
377  u16 word16;
378 
379  pci_read_config_word(pdev, PCI_COMMAND, &word16);
380  word16 |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
381  PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY |
382  PCI_COMMAND_IO;
383  pci_write_config_word(pdev, PCI_COMMAND, word16);
384 
385  /* Status register bits are "write 1 to clear". */
386  pci_write_config_word(pdev, PCI_STATUS, 0xffff);
387  pci_write_config_word(pdev, PCI_SEC_STATUS, 0xffff);
388 
389  /* Use a primary/seconday latency timer value
390  * of 64.
391  */
392  pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
393  pci_write_config_byte(pdev, PCI_SEC_LATENCY_TIMER, 64);
394 
395  /* Enable reporting/forwarding of master aborts,
396  * parity, and SERR.
397  */
398  pci_write_config_byte(pdev, PCI_BRIDGE_CONTROL,
399  (PCI_BRIDGE_CTL_PARITY |
400  PCI_BRIDGE_CTL_SERR |
401  PCI_BRIDGE_CTL_MASTER_ABORT));
402  }
403  }
404 }
405 
406 static void __devinit sabre_scan_bus(struct pci_pbm_info *pbm,
407  struct device *parent)
408 {
409  static int once;
410 
411  /* The APB bridge speaks to the Sabre host PCI bridge
412  * at 66Mhz, but the front side of APB runs at 33Mhz
413  * for both segments.
414  *
415  * Hummingbird systems do not use APB, so they run
416  * at 66MHZ.
417  */
418  if (hummingbird_p)
419  pbm->is_66mhz_capable = 1;
420  else
421  pbm->is_66mhz_capable = 0;
422 
423  /* This driver has not been verified to handle
424  * multiple SABREs yet, so trap this.
425  *
426  * Also note that the SABRE host bridge is hardwired
427  * to live at bus 0.
428  */
429  if (once != 0) {
430  printk(KERN_ERR PFX "Multiple controllers unsupported.\n");
431  return;
432  }
433  once++;
434 
435  pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
436  if (!pbm->pci_bus)
437  return;
438 
439  sabre_root_bus = pbm->pci_bus;
440 
441  apb_init(pbm->pci_bus);
442 
443  sabre_register_error_handlers(pbm);
444 }
445 
446 static void __devinit sabre_pbm_init(struct pci_pbm_info *pbm,
447  struct platform_device *op)
448 {
449  psycho_pbm_init_common(pbm, op, "SABRE", PBM_CHIP_TYPE_SABRE);
450  pbm->pci_afsr = pbm->controller_regs + SABRE_PIOAFSR;
451  pbm->pci_afar = pbm->controller_regs + SABRE_PIOAFAR;
452  pbm->pci_csr = pbm->controller_regs + SABRE_PCICTRL;
453  sabre_scan_bus(pbm, &op->dev);
454 }
455 
456 static const struct of_device_id sabre_match[];
457 static int __devinit sabre_probe(struct platform_device *op)
458 {
459  const struct of_device_id *match;
460  const struct linux_prom64_registers *pr_regs;
461  struct device_node *dp = op->dev.of_node;
462  struct pci_pbm_info *pbm;
463  u32 upa_portid, dma_mask;
464  struct iommu *iommu;
465  int tsbsize, err;
466  const u32 *vdma;
467  u64 clear_irq;
468 
469  match = of_match_device(sabre_match, &op->dev);
470  hummingbird_p = match && (match->data != NULL);
471  if (!hummingbird_p) {
472  struct device_node *cpu_dp;
473 
474  /* Of course, Sun has to encode things a thousand
475  * different ways, inconsistently.
476  */
477  for_each_node_by_type(cpu_dp, "cpu") {
478  if (!strcmp(cpu_dp->name, "SUNW,UltraSPARC-IIe"))
479  hummingbird_p = 1;
480  }
481  }
482 
483  err = -ENOMEM;
484  pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
485  if (!pbm) {
486  printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
487  goto out_err;
488  }
489 
490  iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
491  if (!iommu) {
492  printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
493  goto out_free_controller;
494  }
495 
496  pbm->iommu = iommu;
497 
498  upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
499 
500  pbm->portid = upa_portid;
501 
502  /*
503  * Map in SABRE register set and report the presence of this SABRE.
504  */
505 
506  pr_regs = of_get_property(dp, "reg", NULL);
507  err = -ENODEV;
508  if (!pr_regs) {
509  printk(KERN_ERR PFX "No reg property\n");
510  goto out_free_iommu;
511  }
512 
513  /*
514  * First REG in property is base of entire SABRE register space.
515  */
516  pbm->controller_regs = pr_regs[0].phys_addr;
517 
518  /* Clear interrupts */
519 
520  /* PCI first */
521  for (clear_irq = SABRE_ICLR_A_SLOT0; clear_irq < SABRE_ICLR_B_SLOT0 + 0x80; clear_irq += 8)
522  upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
523 
524  /* Then OBIO */
525  for (clear_irq = SABRE_ICLR_SCSI; clear_irq < SABRE_ICLR_SCSI + 0x80; clear_irq += 8)
526  upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
527 
528  /* Error interrupts are enabled later after the bus scan. */
529  upa_writeq((SABRE_PCICTRL_MRLEN | SABRE_PCICTRL_SERR |
530  SABRE_PCICTRL_ARBPARK | SABRE_PCICTRL_AEN),
531  pbm->controller_regs + SABRE_PCICTRL);
532 
533  /* Now map in PCI config space for entire SABRE. */
534  pbm->config_space = pbm->controller_regs + SABRE_CONFIGSPACE;
535 
536  vdma = of_get_property(dp, "virtual-dma", NULL);
537  if (!vdma) {
538  printk(KERN_ERR PFX "No virtual-dma property\n");
539  goto out_free_iommu;
540  }
541 
542  dma_mask = vdma[0];
543  switch(vdma[1]) {
544  case 0x20000000:
545  dma_mask |= 0x1fffffff;
546  tsbsize = 64;
547  break;
548  case 0x40000000:
549  dma_mask |= 0x3fffffff;
550  tsbsize = 128;
551  break;
552 
553  case 0x80000000:
554  dma_mask |= 0x7fffffff;
555  tsbsize = 128;
556  break;
557  default:
558  printk(KERN_ERR PFX "Strange virtual-dma size.\n");
559  goto out_free_iommu;
560  }
561 
562  err = psycho_iommu_init(pbm, tsbsize, vdma[0], dma_mask, SABRE_WRSYNC);
563  if (err)
564  goto out_free_iommu;
565 
566  /*
567  * Look for APB underneath.
568  */
569  sabre_pbm_init(pbm, op);
570 
571  pbm->next = pci_pbm_root;
572  pci_pbm_root = pbm;
573 
574  dev_set_drvdata(&op->dev, pbm);
575 
576  return 0;
577 
578 out_free_iommu:
579  kfree(pbm->iommu);
580 
581 out_free_controller:
582  kfree(pbm);
583 
584 out_err:
585  return err;
586 }
587 
588 static const struct of_device_id sabre_match[] = {
589  {
590  .name = "pci",
591  .compatible = "pci108e,a001",
592  .data = (void *) 1,
593  },
594  {
595  .name = "pci",
596  .compatible = "pci108e,a000",
597  },
598  {},
599 };
600 
601 static struct platform_driver sabre_driver = {
602  .driver = {
603  .name = DRIVER_NAME,
604  .owner = THIS_MODULE,
605  .of_match_table = sabre_match,
606  },
607  .probe = sabre_probe,
608 };
609 
610 static int __init sabre_init(void)
611 {
612  return platform_driver_register(&sabre_driver);
613 }
614 
615 subsys_initcall(sabre_init);
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