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staging/easycap: don't cast NULL pointer
[wandboard.git] / arch / sparc / kernel / pci_psycho.c
blob22eab7cf3b11eacae552083daacd3afff488e7ef
1 /* pci_psycho.c: PSYCHO/U2P specific PCI controller support.
2 *
3 * Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
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/slab.h>
13 #include <linux/interrupt.h>
14 #include <linux/of_device.h>
15
16 #include <asm/iommu.h>
17 #include <asm/irq.h>
18 #include <asm/starfire.h>
19 #include <asm/prom.h>
20 #include <asm/upa.h>
21
22 #include "pci_impl.h"
23 #include "iommu_common.h"
24 #include "psycho_common.h"
25
26 #define DRIVER_NAME "psycho"
27 #define PFX DRIVER_NAME ": "
28
29 /* Misc. PSYCHO PCI controller register offsets and definitions. */
30 #define PSYCHO_CONTROL 0x0010UL
31 #define PSYCHO_CONTROL_IMPL 0xf000000000000000UL /* Implementation of this PSYCHO*/
32 #define PSYCHO_CONTROL_VER 0x0f00000000000000UL /* Version of this PSYCHO */
33 #define PSYCHO_CONTROL_MID 0x00f8000000000000UL /* UPA Module ID of PSYCHO */
34 #define PSYCHO_CONTROL_IGN 0x0007c00000000000UL /* Interrupt Group Number */
35 #define PSYCHO_CONTROL_RESV 0x00003ffffffffff0UL /* Reserved */
36 #define PSYCHO_CONTROL_APCKEN 0x0000000000000008UL /* Address Parity Check Enable */
37 #define PSYCHO_CONTROL_APERR 0x0000000000000004UL /* Incoming System Addr Parerr */
38 #define PSYCHO_CONTROL_IAP 0x0000000000000002UL /* Invert UPA Parity */
39 #define PSYCHO_CONTROL_MODE 0x0000000000000001UL /* PSYCHO clock mode */
40 #define PSYCHO_PCIA_CTRL 0x2000UL
41 #define PSYCHO_PCIB_CTRL 0x4000UL
42 #define PSYCHO_PCICTRL_RESV1 0xfffffff000000000UL /* Reserved */
43 #define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL /* Streaming byte hole error */
44 #define PSYCHO_PCICTRL_SERR 0x0000000400000000UL /* SERR signal asserted */
45 #define PSYCHO_PCICTRL_SPEED 0x0000000200000000UL /* PCI speed (1 is U2P clock) */
46 #define PSYCHO_PCICTRL_RESV2 0x00000001ffc00000UL /* Reserved */
47 #define PSYCHO_PCICTRL_ARB_PARK 0x0000000000200000UL /* PCI arbitration parking */
48 #define PSYCHO_PCICTRL_RESV3 0x00000000001ff800UL /* Reserved */
49 #define PSYCHO_PCICTRL_SBH_INT 0x0000000000000400UL /* Streaming byte hole int enab */
50 #define PSYCHO_PCICTRL_WEN 0x0000000000000200UL /* Power Mgmt Wake Enable */
51 #define PSYCHO_PCICTRL_EEN 0x0000000000000100UL /* PCI Error Interrupt Enable */
52 #define PSYCHO_PCICTRL_RESV4 0x00000000000000c0UL /* Reserved */
53 #define PSYCHO_PCICTRL_AEN 0x000000000000003fUL /* PCI DVMA Arbitration Enable */
54
55 /* PSYCHO error handling support. */
56
57 /* Helper function of IOMMU error checking, which checks out
58 * the state of the streaming buffers. The IOMMU lock is
59 * held when this is called.
60 *
61 * For the PCI error case we know which PBM (and thus which
62 * streaming buffer) caused the error, but for the uncorrectable
63 * error case we do not. So we always check both streaming caches.
64 */
65 #define PSYCHO_STRBUF_CONTROL_A 0x2800UL
66 #define PSYCHO_STRBUF_CONTROL_B 0x4800UL
67 #define PSYCHO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */
68 #define PSYCHO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */
69 #define PSYCHO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */
70 #define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
71 #define PSYCHO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */
72 #define PSYCHO_STRBUF_FLUSH_A 0x2808UL
73 #define PSYCHO_STRBUF_FLUSH_B 0x4808UL
74 #define PSYCHO_STRBUF_FSYNC_A 0x2810UL
75 #define PSYCHO_STRBUF_FSYNC_B 0x4810UL
76 #define PSYCHO_STC_DATA_A 0xb000UL
77 #define PSYCHO_STC_DATA_B 0xc000UL
78 #define PSYCHO_STC_ERR_A 0xb400UL
79 #define PSYCHO_STC_ERR_B 0xc400UL
80 #define PSYCHO_STC_TAG_A 0xb800UL
81 #define PSYCHO_STC_TAG_B 0xc800UL
82 #define PSYCHO_STC_LINE_A 0xb900UL
83 #define PSYCHO_STC_LINE_B 0xc900UL
84
85 /* When an Uncorrectable Error or a PCI Error happens, we
86 * interrogate the IOMMU state to see if it is the cause.
87 */
88 #define PSYCHO_IOMMU_CONTROL 0x0200UL
89 #define PSYCHO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */
90 #define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */
91 #define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */
92 #define PSYCHO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */
93 #define PSYCHO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */
94 #define PSYCHO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
95 #define PSYCHO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */
96 #define PSYCHO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */
97 #define PSYCHO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */
98 #define PSYCHO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */
99 #define PSYCHO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */
100 #define PSYCHO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */
101 #define PSYCHO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */
102 #define PSYCHO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */
103 #define PSYCHO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */
104 #define PSYCHO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
105 #define PSYCHO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */
106 #define PSYCHO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
107 #define PSYCHO_IOMMU_TSBBASE 0x0208UL
108 #define PSYCHO_IOMMU_FLUSH 0x0210UL
109 #define PSYCHO_IOMMU_TAG 0xa580UL
110 #define PSYCHO_IOMMU_DATA 0xa600UL
111
112 /* Uncorrectable Errors. Cause of the error and the address are
113 * recorded in the UE_AFSR and UE_AFAR of PSYCHO. They are errors
114 * relating to UPA interface transactions.
115 */
116 #define PSYCHO_UE_AFSR 0x0030UL
117 #define PSYCHO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
118 #define PSYCHO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
119 #define PSYCHO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
120 #define PSYCHO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
121 #define PSYCHO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
122 #define PSYCHO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
123 #define PSYCHO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
124 #define PSYCHO_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
125 #define PSYCHO_UEAFSR_DOFF 0x00000000e0000000UL /* Doubleword Offset */
126 #define PSYCHO_UEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
127 #define PSYCHO_UEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
128 #define PSYCHO_UEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
129 #define PSYCHO_UE_AFAR 0x0038UL
130
131 static irqreturn_t psycho_ue_intr(int irq, void *dev_id)
132 {
133 struct pci_pbm_info *pbm = dev_id;
134 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_UE_AFSR;
135 unsigned long afar_reg = pbm->controller_regs + PSYCHO_UE_AFAR;
136 unsigned long afsr, afar, error_bits;
137 int reported;
138
139 /* Latch uncorrectable error status. */
140 afar = upa_readq(afar_reg);
141 afsr = upa_readq(afsr_reg);
142
143 /* Clear the primary/secondary error status bits. */
144 error_bits = afsr &
145 (PSYCHO_UEAFSR_PPIO | PSYCHO_UEAFSR_PDRD | PSYCHO_UEAFSR_PDWR |
146 PSYCHO_UEAFSR_SPIO | PSYCHO_UEAFSR_SDRD | PSYCHO_UEAFSR_SDWR);
147 if (!error_bits)
148 return IRQ_NONE;
149 upa_writeq(error_bits, afsr_reg);
150
151 /* Log the error. */
152 printk("%s: Uncorrectable Error, primary error type[%s]\n",
153 pbm->name,
154 (((error_bits & PSYCHO_UEAFSR_PPIO) ?
155 "PIO" :
156 ((error_bits & PSYCHO_UEAFSR_PDRD) ?
157 "DMA Read" :
158 ((error_bits & PSYCHO_UEAFSR_PDWR) ?
159 "DMA Write" : "???")))));
160 printk("%s: bytemask[%04lx] dword_offset[%lx] UPA_MID[%02lx] was_block(%d)\n",
161 pbm->name,
162 (afsr & PSYCHO_UEAFSR_BMSK) >> 32UL,
163 (afsr & PSYCHO_UEAFSR_DOFF) >> 29UL,
164 (afsr & PSYCHO_UEAFSR_MID) >> 24UL,
165 ((afsr & PSYCHO_UEAFSR_BLK) ? 1 : 0));
166 printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
167 printk("%s: UE Secondary errors [", pbm->name);
168 reported = 0;
169 if (afsr & PSYCHO_UEAFSR_SPIO) {
170 reported++;
171 printk("(PIO)");
172 }
173 if (afsr & PSYCHO_UEAFSR_SDRD) {
174 reported++;
175 printk("(DMA Read)");
176 }
177 if (afsr & PSYCHO_UEAFSR_SDWR) {
178 reported++;
179 printk("(DMA Write)");
180 }
181 if (!reported)
182 printk("(none)");
183 printk("]\n");
184
185 /* Interrogate both IOMMUs for error status. */
186 psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
187 if (pbm->sibling)
188 psycho_check_iommu_error(pbm->sibling, afsr, afar, UE_ERR);
189
190 return IRQ_HANDLED;
191 }
192
193 /* Correctable Errors. */
194 #define PSYCHO_CE_AFSR 0x0040UL
195 #define PSYCHO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
196 #define PSYCHO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
197 #define PSYCHO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
198 #define PSYCHO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
199 #define PSYCHO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
200 #define PSYCHO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
201 #define PSYCHO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
202 #define PSYCHO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
203 #define PSYCHO_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
204 #define PSYCHO_CEAFSR_DOFF 0x00000000e0000000UL /* Double Offset */
205 #define PSYCHO_CEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
206 #define PSYCHO_CEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
207 #define PSYCHO_CEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
208 #define PSYCHO_CE_AFAR 0x0040UL
209
210 static irqreturn_t psycho_ce_intr(int irq, void *dev_id)
211 {
212 struct pci_pbm_info *pbm = dev_id;
213 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_CE_AFSR;
214 unsigned long afar_reg = pbm->controller_regs + PSYCHO_CE_AFAR;
215 unsigned long afsr, afar, error_bits;
216 int reported;
217
218 /* Latch error status. */
219 afar = upa_readq(afar_reg);
220 afsr = upa_readq(afsr_reg);
221
222 /* Clear primary/secondary error status bits. */
223 error_bits = afsr &
224 (PSYCHO_CEAFSR_PPIO | PSYCHO_CEAFSR_PDRD | PSYCHO_CEAFSR_PDWR |
225 PSYCHO_CEAFSR_SPIO | PSYCHO_CEAFSR_SDRD | PSYCHO_CEAFSR_SDWR);
226 if (!error_bits)
227 return IRQ_NONE;
228 upa_writeq(error_bits, afsr_reg);
229
230 /* Log the error. */
231 printk("%s: Correctable Error, primary error type[%s]\n",
232 pbm->name,
233 (((error_bits & PSYCHO_CEAFSR_PPIO) ?
234 "PIO" :
235 ((error_bits & PSYCHO_CEAFSR_PDRD) ?
236 "DMA Read" :
237 ((error_bits & PSYCHO_CEAFSR_PDWR) ?
238 "DMA Write" : "???")))));
239
240 /* XXX Use syndrome and afar to print out module string just like
241 * XXX UDB CE trap handler does... -DaveM
242 */
243 printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
244 "UPA_MID[%02lx] was_block(%d)\n",
245 pbm->name,
246 (afsr & PSYCHO_CEAFSR_ESYND) >> 48UL,
247 (afsr & PSYCHO_CEAFSR_BMSK) >> 32UL,
248 (afsr & PSYCHO_CEAFSR_DOFF) >> 29UL,
249 (afsr & PSYCHO_CEAFSR_MID) >> 24UL,
250 ((afsr & PSYCHO_CEAFSR_BLK) ? 1 : 0));
251 printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
252 printk("%s: CE Secondary errors [", pbm->name);
253 reported = 0;
254 if (afsr & PSYCHO_CEAFSR_SPIO) {
255 reported++;
256 printk("(PIO)");
257 }
258 if (afsr & PSYCHO_CEAFSR_SDRD) {
259 reported++;
260 printk("(DMA Read)");
261 }
262 if (afsr & PSYCHO_CEAFSR_SDWR) {
263 reported++;
264 printk("(DMA Write)");
265 }
266 if (!reported)
267 printk("(none)");
268 printk("]\n");
269
270 return IRQ_HANDLED;
271 }
272
273 /* PCI Errors. They are signalled by the PCI bus module since they
274 * are associated with a specific bus segment.
275 */
276 #define PSYCHO_PCI_AFSR_A 0x2010UL
277 #define PSYCHO_PCI_AFSR_B 0x4010UL
278 #define PSYCHO_PCI_AFAR_A 0x2018UL
279 #define PSYCHO_PCI_AFAR_B 0x4018UL
280
281 /* XXX What about PowerFail/PowerManagement??? -DaveM */
282 #define PSYCHO_ECC_CTRL 0x0020
283 #define PSYCHO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */
284 #define PSYCHO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */
285 #define PSYCHO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */
286 static void psycho_register_error_handlers(struct pci_pbm_info *pbm)
287 {
288 struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
289 unsigned long base = pbm->controller_regs;
290 u64 tmp;
291 int err;
292
293 if (!op)
294 return;
295
296 /* Psycho interrupt property order is:
297 * 0: PCIERR INO for this PBM
298 * 1: UE ERR
299 * 2: CE ERR
300 * 3: POWER FAIL
301 * 4: SPARE HARDWARE
302 * 5: POWER MANAGEMENT
303 */
304
305 if (op->archdata.num_irqs < 6)
306 return;
307
308 /* We really mean to ignore the return result here. Two
309 * PCI controller share the same interrupt numbers and
310 * drive the same front-end hardware.
311 */
312 err = request_irq(op->archdata.irqs[1], psycho_ue_intr, IRQF_SHARED,
313 "PSYCHO_UE", pbm);
314 err = request_irq(op->archdata.irqs[2], psycho_ce_intr, IRQF_SHARED,
315 "PSYCHO_CE", pbm);
316
317 /* This one, however, ought not to fail. We can just warn
318 * about it since the system can still operate properly even
319 * if this fails.
320 */
321 err = request_irq(op->archdata.irqs[0], psycho_pcierr_intr, IRQF_SHARED,
322 "PSYCHO_PCIERR", pbm);
323 if (err)
324 printk(KERN_WARNING "%s: Could not register PCIERR, "
325 "err=%d\n", pbm->name, err);
326
327 /* Enable UE and CE interrupts for controller. */
328 upa_writeq((PSYCHO_ECCCTRL_EE |
329 PSYCHO_ECCCTRL_UE |
330 PSYCHO_ECCCTRL_CE), base + PSYCHO_ECC_CTRL);
331
332 /* Enable PCI Error interrupts and clear error
333 * bits for each PBM.
334 */
335 tmp = upa_readq(base + PSYCHO_PCIA_CTRL);
336 tmp |= (PSYCHO_PCICTRL_SERR |
337 PSYCHO_PCICTRL_SBH_ERR |
338 PSYCHO_PCICTRL_EEN);
339 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
340 upa_writeq(tmp, base + PSYCHO_PCIA_CTRL);
341
342 tmp = upa_readq(base + PSYCHO_PCIB_CTRL);
343 tmp |= (PSYCHO_PCICTRL_SERR |
344 PSYCHO_PCICTRL_SBH_ERR |
345 PSYCHO_PCICTRL_EEN);
346 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
347 upa_writeq(tmp, base + PSYCHO_PCIB_CTRL);
348 }
349
350 /* PSYCHO boot time probing and initialization. */
351 static void pbm_config_busmastering(struct pci_pbm_info *pbm)
352 {
353 u8 *addr;
354
355 /* Set cache-line size to 64 bytes, this is actually
356 * a nop but I do it for completeness.
357 */
358 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
359 0, PCI_CACHE_LINE_SIZE);
360 pci_config_write8(addr, 64 / sizeof(u32));
361
362 /* Set PBM latency timer to 64 PCI clocks. */
363 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
364 0, PCI_LATENCY_TIMER);
365 pci_config_write8(addr, 64);
366 }
367
368 static void __devinit psycho_scan_bus(struct pci_pbm_info *pbm,
369 struct device *parent)
370 {
371 pbm_config_busmastering(pbm);
372 pbm->is_66mhz_capable = 0;
373 pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
374
375 /* After the PCI bus scan is complete, we can register
376 * the error interrupt handlers.
377 */
378 psycho_register_error_handlers(pbm);
379 }
380
381 #define PSYCHO_IRQ_RETRY 0x1a00UL
382 #define PSYCHO_PCIA_DIAG 0x2020UL
383 #define PSYCHO_PCIB_DIAG 0x4020UL
384 #define PSYCHO_PCIDIAG_RESV 0xffffffffffffff80UL /* Reserved */
385 #define PSYCHO_PCIDIAG_DRETRY 0x0000000000000040UL /* Disable retry limit */
386 #define PSYCHO_PCIDIAG_DISYNC 0x0000000000000020UL /* Disable DMA wr / irq sync */
387 #define PSYCHO_PCIDIAG_DDWSYNC 0x0000000000000010UL /* Disable DMA wr / PIO rd sync */
388 #define PSYCHO_PCIDIAG_IDDPAR 0x0000000000000008UL /* Invert DMA data parity */
389 #define PSYCHO_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO data parity */
390 #define PSYCHO_PCIDIAG_IPAPAR 0x0000000000000002UL /* Invert PIO address parity */
391 #define PSYCHO_PCIDIAG_LPBACK 0x0000000000000001UL /* Enable loopback mode */
392
393 static void psycho_controller_hwinit(struct pci_pbm_info *pbm)
394 {
395 u64 tmp;
396
397 upa_writeq(5, pbm->controller_regs + PSYCHO_IRQ_RETRY);
398
399 /* Enable arbiter for all PCI slots. */
400 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_CTRL);
401 tmp |= PSYCHO_PCICTRL_AEN;
402 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_CTRL);
403
404 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_CTRL);
405 tmp |= PSYCHO_PCICTRL_AEN;
406 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_CTRL);
407
408 /* Disable DMA write / PIO read synchronization on
409 * both PCI bus segments.
410 * [ U2P Erratum 1243770, STP2223BGA data sheet ]
411 */
412 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_DIAG);
413 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
414 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_DIAG);
415
416 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_DIAG);
417 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
418 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_DIAG);
419 }
420
421 static void psycho_pbm_strbuf_init(struct pci_pbm_info *pbm,
422 int is_pbm_a)
423 {
424 unsigned long base = pbm->controller_regs;
425 u64 control;
426
427 if (is_pbm_a) {
428 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_A;
429 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_A;
430 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_A;
431 pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_A;
432 pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_A;
433 pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_A;
434 } else {
435 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_B;
436 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_B;
437 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_B;
438 pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_B;
439 pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_B;
440 pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_B;
441 }
442 /* PSYCHO's streaming buffer lacks ctx flushing. */
443 pbm->stc.strbuf_ctxflush = 0;
444 pbm->stc.strbuf_ctxmatch_base = 0;
445
446 pbm->stc.strbuf_flushflag = (volatile unsigned long *)
447 ((((unsigned long)&pbm->stc.__flushflag_buf[0])
448 + 63UL)
449 & ~63UL);
450 pbm->stc.strbuf_flushflag_pa = (unsigned long)
451 __pa(pbm->stc.strbuf_flushflag);
452
453 /* Enable the streaming buffer. We have to be careful
454 * just in case OBP left it with LRU locking enabled.
455 *
456 * It is possible to control if PBM will be rerun on
457 * line misses. Currently I just retain whatever setting
458 * OBP left us with. All checks so far show it having
459 * a value of zero.
460 */
461 #undef PSYCHO_STRBUF_RERUN_ENABLE
462 #undef PSYCHO_STRBUF_RERUN_DISABLE
463 control = upa_readq(pbm->stc.strbuf_control);
464 control |= PSYCHO_STRBUF_CTRL_ENAB;
465 control &= ~(PSYCHO_STRBUF_CTRL_LENAB | PSYCHO_STRBUF_CTRL_LPTR);
466 #ifdef PSYCHO_STRBUF_RERUN_ENABLE
467 control &= ~(PSYCHO_STRBUF_CTRL_RRDIS);
468 #else
469 #ifdef PSYCHO_STRBUF_RERUN_DISABLE
470 control |= PSYCHO_STRBUF_CTRL_RRDIS;
471 #endif
472 #endif
473 upa_writeq(control, pbm->stc.strbuf_control);
474
475 pbm->stc.strbuf_enabled = 1;
476 }
477
478 #define PSYCHO_IOSPACE_A 0x002000000UL
479 #define PSYCHO_IOSPACE_B 0x002010000UL
480 #define PSYCHO_IOSPACE_SIZE 0x00000ffffUL
481 #define PSYCHO_MEMSPACE_A 0x100000000UL
482 #define PSYCHO_MEMSPACE_B 0x180000000UL
483 #define PSYCHO_MEMSPACE_SIZE 0x07fffffffUL
484
485 static void __devinit psycho_pbm_init(struct pci_pbm_info *pbm,
486 struct platform_device *op, int is_pbm_a)
487 {
488 psycho_pbm_init_common(pbm, op, "PSYCHO", PBM_CHIP_TYPE_PSYCHO);
489 psycho_pbm_strbuf_init(pbm, is_pbm_a);
490 psycho_scan_bus(pbm, &op->dev);
491 }
492
493 static struct pci_pbm_info * __devinit psycho_find_sibling(u32 upa_portid)
494 {
495 struct pci_pbm_info *pbm;
496
497 for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
498 if (pbm->portid == upa_portid)
499 return pbm;
500 }
501 return NULL;
502 }
503
504 #define PSYCHO_CONFIGSPACE 0x001000000UL
505
506 static int __devinit psycho_probe(struct platform_device *op,
507 const struct of_device_id *match)
508 {
509 const struct linux_prom64_registers *pr_regs;
510 struct device_node *dp = op->dev.of_node;
511 struct pci_pbm_info *pbm;
512 struct iommu *iommu;
513 int is_pbm_a, err;
514 u32 upa_portid;
515
516 upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
517
518 err = -ENOMEM;
519 pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
520 if (!pbm) {
521 printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
522 goto out_err;
523 }
524
525 pbm->sibling = psycho_find_sibling(upa_portid);
526 if (pbm->sibling) {
527 iommu = pbm->sibling->iommu;
528 } else {
529 iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
530 if (!iommu) {
531 printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
532 goto out_free_controller;
533 }
534 }
535
536 pbm->iommu = iommu;
537 pbm->portid = upa_portid;
538
539 pr_regs = of_get_property(dp, "reg", NULL);
540 err = -ENODEV;
541 if (!pr_regs) {
542 printk(KERN_ERR PFX "No reg property.\n");
543 goto out_free_iommu;
544 }
545
546 is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
547
548 pbm->controller_regs = pr_regs[2].phys_addr;
549 pbm->config_space = (pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
550
551 if (is_pbm_a) {
552 pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_A;
553 pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_A;
554 pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIA_CTRL;
555 } else {
556 pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_B;
557 pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_B;
558 pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIB_CTRL;
559 }
560
561 psycho_controller_hwinit(pbm);
562 if (!pbm->sibling) {
563 err = psycho_iommu_init(pbm, 128, 0xc0000000,
564 0xffffffff, PSYCHO_CONTROL);
565 if (err)
566 goto out_free_iommu;
567
568 /* If necessary, hook us up for starfire IRQ translations. */
569 if (this_is_starfire)
570 starfire_hookup(pbm->portid);
571 }
572
573 psycho_pbm_init(pbm, op, is_pbm_a);
574
575 pbm->next = pci_pbm_root;
576 pci_pbm_root = pbm;
577
578 if (pbm->sibling)
579 pbm->sibling->sibling = pbm;
580
581 dev_set_drvdata(&op->dev, pbm);
582
583 return 0;
584
585 out_free_iommu:
586 if (!pbm->sibling)
587 kfree(pbm->iommu);
588
589 out_free_controller:
590 kfree(pbm);
591
592 out_err:
593 return err;
594 }
595
596 static struct of_device_id __initdata psycho_match[] = {
597 {
598 .name = "pci",
599 .compatible = "pci108e,8000",
600 },
601 {},
602 };
603
604 static struct of_platform_driver psycho_driver = {
605 .driver = {
606 .name = DRIVER_NAME,
607 .owner = THIS_MODULE,
608 .of_match_table = psycho_match,
609 },
610 .probe = psycho_probe,
611 };
612
613 static int __init psycho_init(void)
614 {
615 return of_register_platform_driver(&psycho_driver);
616 }
617
618 subsys_initcall(psycho_init);
WandBoard kernel