1 /*
2 * Define the pci_ops for the PCIC on Toshiba TX4927, TX4938, etc.
3 *
4 * Based on linux/arch/mips/pci/ops-tx4938.c,
5 * linux/arch/mips/pci/fixup-rbtx4938.c,
6 * linux/arch/mips/txx9/rbtx4938/setup.c,
7 * and RBTX49xx patch from CELF patch archive.
8 *
9 * 2003-2005 (c) MontaVista Software, Inc.
10 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
11 * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 */
18 #include <linux/kernel.h>
19 #include <linux/interrupt.h>
20 #include <linux/irq.h>
21 #include <asm/txx9/pci.h>
22 #include <asm/txx9/tx4927pcic.h>
23
24 static struct {
25 struct pci_controller *channel;
26 struct tx4927_pcic_reg __iomem *pcicptr;
27 } pcicptrs[2]; /* TX4938 has 2 pcic */
28
set_tx4927_pcicptr(struct pci_controller * channel,struct tx4927_pcic_reg __iomem * pcicptr)29 static void __init set_tx4927_pcicptr(struct pci_controller *channel,
30 struct tx4927_pcic_reg __iomem *pcicptr)
31 {
32 int i;
33
34 for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
35 if (pcicptrs[i].channel == channel) {
36 pcicptrs[i].pcicptr = pcicptr;
37 return;
38 }
39 }
40 for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
41 if (!pcicptrs[i].channel) {
42 pcicptrs[i].channel = channel;
43 pcicptrs[i].pcicptr = pcicptr;
44 return;
45 }
46 }
47 BUG();
48 }
49
get_tx4927_pcicptr(struct pci_controller * channel)50 struct tx4927_pcic_reg __iomem *get_tx4927_pcicptr(
51 struct pci_controller *channel)
52 {
53 int i;
54
55 for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
56 if (pcicptrs[i].channel == channel)
57 return pcicptrs[i].pcicptr;
58 }
59 return NULL;
60 }
61
mkaddr(struct pci_bus * bus,unsigned int devfn,int where,struct tx4927_pcic_reg __iomem * pcicptr)62 static int mkaddr(struct pci_bus *bus, unsigned int devfn, int where,
63 struct tx4927_pcic_reg __iomem *pcicptr)
64 {
65 if (bus->parent == NULL &&
66 devfn >= PCI_DEVFN(TX4927_PCIC_MAX_DEVNU, 0))
67 return -1;
68 __raw_writel(((bus->number & 0xff) << 0x10)
69 | ((devfn & 0xff) << 0x08) | (where & 0xfc)
70 | (bus->parent ? 1 : 0),
71 &pcicptr->g2pcfgadrs);
72 /* clear M_ABORT and Disable M_ABORT Int. */
73 __raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
74 | (PCI_STATUS_REC_MASTER_ABORT << 16),
75 &pcicptr->pcistatus);
76 return 0;
77 }
78
check_abort(struct tx4927_pcic_reg __iomem * pcicptr)79 static int check_abort(struct tx4927_pcic_reg __iomem *pcicptr)
80 {
81 int code = PCIBIOS_SUCCESSFUL;
82
83 /* wait write cycle completion before checking error status */
84 while (__raw_readl(&pcicptr->pcicstatus) & TX4927_PCIC_PCICSTATUS_IWB)
85 ;
86 if (__raw_readl(&pcicptr->pcistatus)
87 & (PCI_STATUS_REC_MASTER_ABORT << 16)) {
88 __raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
89 | (PCI_STATUS_REC_MASTER_ABORT << 16),
90 &pcicptr->pcistatus);
91 /* flush write buffer */
92 iob();
93 code = PCIBIOS_DEVICE_NOT_FOUND;
94 }
95 return code;
96 }
97
icd_readb(int offset,struct tx4927_pcic_reg __iomem * pcicptr)98 static u8 icd_readb(int offset, struct tx4927_pcic_reg __iomem *pcicptr)
99 {
100 #ifdef __BIG_ENDIAN
101 offset ^= 3;
102 #endif
103 return __raw_readb((void __iomem *)&pcicptr->g2pcfgdata + offset);
104 }
icd_readw(int offset,struct tx4927_pcic_reg __iomem * pcicptr)105 static u16 icd_readw(int offset, struct tx4927_pcic_reg __iomem *pcicptr)
106 {
107 #ifdef __BIG_ENDIAN
108 offset ^= 2;
109 #endif
110 return __raw_readw((void __iomem *)&pcicptr->g2pcfgdata + offset);
111 }
icd_readl(struct tx4927_pcic_reg __iomem * pcicptr)112 static u32 icd_readl(struct tx4927_pcic_reg __iomem *pcicptr)
113 {
114 return __raw_readl(&pcicptr->g2pcfgdata);
115 }
icd_writeb(u8 val,int offset,struct tx4927_pcic_reg __iomem * pcicptr)116 static void icd_writeb(u8 val, int offset,
117 struct tx4927_pcic_reg __iomem *pcicptr)
118 {
119 #ifdef __BIG_ENDIAN
120 offset ^= 3;
121 #endif
122 __raw_writeb(val, (void __iomem *)&pcicptr->g2pcfgdata + offset);
123 }
icd_writew(u16 val,int offset,struct tx4927_pcic_reg __iomem * pcicptr)124 static void icd_writew(u16 val, int offset,
125 struct tx4927_pcic_reg __iomem *pcicptr)
126 {
127 #ifdef __BIG_ENDIAN
128 offset ^= 2;
129 #endif
130 __raw_writew(val, (void __iomem *)&pcicptr->g2pcfgdata + offset);
131 }
icd_writel(u32 val,struct tx4927_pcic_reg __iomem * pcicptr)132 static void icd_writel(u32 val, struct tx4927_pcic_reg __iomem *pcicptr)
133 {
134 __raw_writel(val, &pcicptr->g2pcfgdata);
135 }
136
pci_bus_to_pcicptr(struct pci_bus * bus)137 static struct tx4927_pcic_reg __iomem *pci_bus_to_pcicptr(struct pci_bus *bus)
138 {
139 struct pci_controller *channel = bus->sysdata;
140 return get_tx4927_pcicptr(channel);
141 }
142
tx4927_pci_config_read(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 * val)143 static int tx4927_pci_config_read(struct pci_bus *bus, unsigned int devfn,
144 int where, int size, u32 *val)
145 {
146 struct tx4927_pcic_reg __iomem *pcicptr = pci_bus_to_pcicptr(bus);
147
148 if (mkaddr(bus, devfn, where, pcicptr)) {
149 *val = 0xffffffff;
150 return -1;
151 }
152 switch (size) {
153 case 1:
154 *val = icd_readb(where & 3, pcicptr);
155 break;
156 case 2:
157 *val = icd_readw(where & 3, pcicptr);
158 break;
159 default:
160 *val = icd_readl(pcicptr);
161 }
162 return check_abort(pcicptr);
163 }
164
tx4927_pci_config_write(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 val)165 static int tx4927_pci_config_write(struct pci_bus *bus, unsigned int devfn,
166 int where, int size, u32 val)
167 {
168 struct tx4927_pcic_reg __iomem *pcicptr = pci_bus_to_pcicptr(bus);
169
170 if (mkaddr(bus, devfn, where, pcicptr))
171 return -1;
172 switch (size) {
173 case 1:
174 icd_writeb(val, where & 3, pcicptr);
175 break;
176 case 2:
177 icd_writew(val, where & 3, pcicptr);
178 break;
179 default:
180 icd_writel(val, pcicptr);
181 }
182 return check_abort(pcicptr);
183 }
184
185 static struct pci_ops tx4927_pci_ops = {
186 .read = tx4927_pci_config_read,
187 .write = tx4927_pci_config_write,
188 };
189
190 static struct {
191 u8 trdyto;
192 u8 retryto;
193 u16 gbwc;
194 } tx4927_pci_opts = {
195 .trdyto = 0,
196 .retryto = 0,
197 .gbwc = 0xfe0, /* 4064 GBUSCLK for CCFG.GTOT=0b11 */
198 };
199
tx4927_pcibios_setup(char * str)200 char *tx4927_pcibios_setup(char *str)
201 {
202 unsigned long val;
203
204 if (!strncmp(str, "trdyto=", 7)) {
205 if (strict_strtoul(str + 7, 0, &val) == 0)
206 tx4927_pci_opts.trdyto = val;
207 return NULL;
208 }
209 if (!strncmp(str, "retryto=", 8)) {
210 if (strict_strtoul(str + 8, 0, &val) == 0)
211 tx4927_pci_opts.retryto = val;
212 return NULL;
213 }
214 if (!strncmp(str, "gbwc=", 5)) {
215 if (strict_strtoul(str + 5, 0, &val) == 0)
216 tx4927_pci_opts.gbwc = val;
217 return NULL;
218 }
219 return str;
220 }
221
tx4927_pcic_setup(struct tx4927_pcic_reg __iomem * pcicptr,struct pci_controller * channel,int extarb)222 void __init tx4927_pcic_setup(struct tx4927_pcic_reg __iomem *pcicptr,
223 struct pci_controller *channel, int extarb)
224 {
225 int i;
226 unsigned long flags;
227
228 set_tx4927_pcicptr(channel, pcicptr);
229
230 if (!channel->pci_ops)
231 printk(KERN_INFO
232 "PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:%s\n",
233 __raw_readl(&pcicptr->pciid) >> 16,
234 __raw_readl(&pcicptr->pciid) & 0xffff,
235 __raw_readl(&pcicptr->pciccrev) & 0xff,
236 extarb ? "External" : "Internal");
237 channel->pci_ops = &tx4927_pci_ops;
238
239 local_irq_save(flags);
240
241 /* Disable All Initiator Space */
242 __raw_writel(__raw_readl(&pcicptr->pciccfg)
243 & ~(TX4927_PCIC_PCICCFG_G2PMEN(0)
244 | TX4927_PCIC_PCICCFG_G2PMEN(1)
245 | TX4927_PCIC_PCICCFG_G2PMEN(2)
246 | TX4927_PCIC_PCICCFG_G2PIOEN),
247 &pcicptr->pciccfg);
248
249 /* GB->PCI mappings */
250 __raw_writel((channel->io_resource->end - channel->io_resource->start)
251 >> 4,
252 &pcicptr->g2piomask);
253 ____raw_writeq((channel->io_resource->start +
254 channel->io_map_base - IO_BASE) |
255 #ifdef __BIG_ENDIAN
256 TX4927_PCIC_G2PIOGBASE_ECHG
257 #else
258 TX4927_PCIC_G2PIOGBASE_BSDIS
259 #endif
260 , &pcicptr->g2piogbase);
261 ____raw_writeq(channel->io_resource->start - channel->io_offset,
262 &pcicptr->g2piopbase);
263 for (i = 0; i < 3; i++) {
264 __raw_writel(0, &pcicptr->g2pmmask[i]);
265 ____raw_writeq(0, &pcicptr->g2pmgbase[i]);
266 ____raw_writeq(0, &pcicptr->g2pmpbase[i]);
267 }
268 if (channel->mem_resource->end) {
269 __raw_writel((channel->mem_resource->end
270 - channel->mem_resource->start) >> 4,
271 &pcicptr->g2pmmask[0]);
272 ____raw_writeq(channel->mem_resource->start |
273 #ifdef __BIG_ENDIAN
274 TX4927_PCIC_G2PMnGBASE_ECHG
275 #else
276 TX4927_PCIC_G2PMnGBASE_BSDIS
277 #endif
278 , &pcicptr->g2pmgbase[0]);
279 ____raw_writeq(channel->mem_resource->start -
280 channel->mem_offset,
281 &pcicptr->g2pmpbase[0]);
282 }
283 /* PCI->GB mappings (I/O 256B) */
284 __raw_writel(0, &pcicptr->p2giopbase); /* 256B */
285 ____raw_writeq(0, &pcicptr->p2giogbase);
286 /* PCI->GB mappings (MEM 512MB (64MB on R1.x)) */
287 __raw_writel(0, &pcicptr->p2gm0plbase);
288 __raw_writel(0, &pcicptr->p2gm0pubase);
289 ____raw_writeq(TX4927_PCIC_P2GMnGBASE_TMEMEN |
290 #ifdef __BIG_ENDIAN
291 TX4927_PCIC_P2GMnGBASE_TECHG
292 #else
293 TX4927_PCIC_P2GMnGBASE_TBSDIS
294 #endif
295 , &pcicptr->p2gmgbase[0]);
296 /* PCI->GB mappings (MEM 16MB) */
297 __raw_writel(0xffffffff, &pcicptr->p2gm1plbase);
298 __raw_writel(0xffffffff, &pcicptr->p2gm1pubase);
299 ____raw_writeq(0, &pcicptr->p2gmgbase[1]);
300 /* PCI->GB mappings (MEM 1MB) */
301 __raw_writel(0xffffffff, &pcicptr->p2gm2pbase); /* 1MB */
302 ____raw_writeq(0, &pcicptr->p2gmgbase[2]);
303
304 /* Clear all (including IRBER) except for GBWC */
305 __raw_writel((tx4927_pci_opts.gbwc << 16)
306 & TX4927_PCIC_PCICCFG_GBWC_MASK,
307 &pcicptr->pciccfg);
308 /* Enable Initiator Memory Space */
309 if (channel->mem_resource->end)
310 __raw_writel(__raw_readl(&pcicptr->pciccfg)
311 | TX4927_PCIC_PCICCFG_G2PMEN(0),
312 &pcicptr->pciccfg);
313 /* Enable Initiator I/O Space */
314 if (channel->io_resource->end)
315 __raw_writel(__raw_readl(&pcicptr->pciccfg)
316 | TX4927_PCIC_PCICCFG_G2PIOEN,
317 &pcicptr->pciccfg);
318 /* Enable Initiator Config */
319 __raw_writel(__raw_readl(&pcicptr->pciccfg)
320 | TX4927_PCIC_PCICCFG_ICAEN | TX4927_PCIC_PCICCFG_TCAR,
321 &pcicptr->pciccfg);
322
323 /* Do not use MEMMUL, MEMINF: YMFPCI card causes M_ABORT. */
324 __raw_writel(0, &pcicptr->pcicfg1);
325
326 __raw_writel((__raw_readl(&pcicptr->g2ptocnt) & ~0xffff)
327 | (tx4927_pci_opts.trdyto & 0xff)
328 | ((tx4927_pci_opts.retryto & 0xff) << 8),
329 &pcicptr->g2ptocnt);
330
331 /* Clear All Local Bus Status */
332 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicstatus);
333 /* Enable All Local Bus Interrupts */
334 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicmask);
335 /* Clear All Initiator Status */
336 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pstatus);
337 /* Enable All Initiator Interrupts */
338 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pmask);
339 /* Clear All PCI Status Error */
340 __raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
341 | (TX4927_PCIC_PCISTATUS_ALL << 16),
342 &pcicptr->pcistatus);
343 /* Enable All PCI Status Error Interrupts */
344 __raw_writel(TX4927_PCIC_PCISTATUS_ALL, &pcicptr->pcimask);
345
346 if (!extarb) {
347 /* Reset Bus Arbiter */
348 __raw_writel(TX4927_PCIC_PBACFG_RPBA, &pcicptr->pbacfg);
349 __raw_writel(0, &pcicptr->pbabm);
350 /* Enable Bus Arbiter */
351 __raw_writel(TX4927_PCIC_PBACFG_PBAEN, &pcicptr->pbacfg);
352 }
353
354 __raw_writel(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
355 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR,
356 &pcicptr->pcistatus);
357 local_irq_restore(flags);
358
359 printk(KERN_DEBUG
360 "PCI: COMMAND=%04x,PCIMASK=%04x,"
361 "TRDYTO=%02x,RETRYTO=%02x,GBWC=%03x\n",
362 __raw_readl(&pcicptr->pcistatus) & 0xffff,
363 __raw_readl(&pcicptr->pcimask) & 0xffff,
364 __raw_readl(&pcicptr->g2ptocnt) & 0xff,
365 (__raw_readl(&pcicptr->g2ptocnt) & 0xff00) >> 8,
366 (__raw_readl(&pcicptr->pciccfg) >> 16) & 0xfff);
367 }
368
tx4927_report_pcic_status1(struct tx4927_pcic_reg __iomem * pcicptr)369 static void tx4927_report_pcic_status1(struct tx4927_pcic_reg __iomem *pcicptr)
370 {
371 __u16 pcistatus = (__u16)(__raw_readl(&pcicptr->pcistatus) >> 16);
372 __u32 g2pstatus = __raw_readl(&pcicptr->g2pstatus);
373 __u32 pcicstatus = __raw_readl(&pcicptr->pcicstatus);
374 static struct {
375 __u32 flag;
376 const char *str;
377 } pcistat_tbl[] = {
378 { PCI_STATUS_DETECTED_PARITY, "DetectedParityError" },
379 { PCI_STATUS_SIG_SYSTEM_ERROR, "SignaledSystemError" },
380 { PCI_STATUS_REC_MASTER_ABORT, "ReceivedMasterAbort" },
381 { PCI_STATUS_REC_TARGET_ABORT, "ReceivedTargetAbort" },
382 { PCI_STATUS_SIG_TARGET_ABORT, "SignaledTargetAbort" },
383 { PCI_STATUS_PARITY, "MasterParityError" },
384 }, g2pstat_tbl[] = {
385 { TX4927_PCIC_G2PSTATUS_TTOE, "TIOE" },
386 { TX4927_PCIC_G2PSTATUS_RTOE, "RTOE" },
387 }, pcicstat_tbl[] = {
388 { TX4927_PCIC_PCICSTATUS_PME, "PME" },
389 { TX4927_PCIC_PCICSTATUS_TLB, "TLB" },
390 { TX4927_PCIC_PCICSTATUS_NIB, "NIB" },
391 { TX4927_PCIC_PCICSTATUS_ZIB, "ZIB" },
392 { TX4927_PCIC_PCICSTATUS_PERR, "PERR" },
393 { TX4927_PCIC_PCICSTATUS_SERR, "SERR" },
394 { TX4927_PCIC_PCICSTATUS_GBE, "GBE" },
395 { TX4927_PCIC_PCICSTATUS_IWB, "IWB" },
396 };
397 int i, cont;
398
399 printk(KERN_ERR "");
400 if (pcistatus & TX4927_PCIC_PCISTATUS_ALL) {
401 printk(KERN_CONT "pcistat:%04x(", pcistatus);
402 for (i = 0, cont = 0; i < ARRAY_SIZE(pcistat_tbl); i++)
403 if (pcistatus & pcistat_tbl[i].flag)
404 printk(KERN_CONT "%s%s",
405 cont++ ? " " : "", pcistat_tbl[i].str);
406 printk(KERN_CONT ") ");
407 }
408 if (g2pstatus & TX4927_PCIC_G2PSTATUS_ALL) {
409 printk(KERN_CONT "g2pstatus:%08x(", g2pstatus);
410 for (i = 0, cont = 0; i < ARRAY_SIZE(g2pstat_tbl); i++)
411 if (g2pstatus & g2pstat_tbl[i].flag)
412 printk(KERN_CONT "%s%s",
413 cont++ ? " " : "", g2pstat_tbl[i].str);
414 printk(KERN_CONT ") ");
415 }
416 if (pcicstatus & TX4927_PCIC_PCICSTATUS_ALL) {
417 printk(KERN_CONT "pcicstatus:%08x(", pcicstatus);
418 for (i = 0, cont = 0; i < ARRAY_SIZE(pcicstat_tbl); i++)
419 if (pcicstatus & pcicstat_tbl[i].flag)
420 printk(KERN_CONT "%s%s",
421 cont++ ? " " : "", pcicstat_tbl[i].str);
422 printk(KERN_CONT ")");
423 }
424 printk(KERN_CONT "\n");
425 }
426
tx4927_report_pcic_status(void)427 void tx4927_report_pcic_status(void)
428 {
429 int i;
430
431 for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
432 if (pcicptrs[i].pcicptr)
433 tx4927_report_pcic_status1(pcicptrs[i].pcicptr);
434 }
435 }
436
tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem * pcicptr)437 static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem *pcicptr)
438 {
439 int i;
440 __u32 __iomem *preg = (__u32 __iomem *)pcicptr;
441
442 printk(KERN_INFO "tx4927 pcic (0x%p) settings:", pcicptr);
443 for (i = 0; i < sizeof(struct tx4927_pcic_reg); i += 4, preg++) {
444 if (i % 32 == 0) {
445 printk(KERN_CONT "\n");
446 printk(KERN_INFO "%04x:", i);
447 }
448 /* skip registers with side-effects */
449 if (i == offsetof(struct tx4927_pcic_reg, g2pintack)
450 || i == offsetof(struct tx4927_pcic_reg, g2pspc)
451 || i == offsetof(struct tx4927_pcic_reg, g2pcfgadrs)
452 || i == offsetof(struct tx4927_pcic_reg, g2pcfgdata)) {
453 printk(KERN_CONT " XXXXXXXX");
454 continue;
455 }
456 printk(KERN_CONT " %08x", __raw_readl(preg));
457 }
458 printk(KERN_CONT "\n");
459 }
460
tx4927_dump_pcic_settings(void)461 void tx4927_dump_pcic_settings(void)
462 {
463 int i;
464
465 for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
466 if (pcicptrs[i].pcicptr)
467 tx4927_dump_pcic_settings1(pcicptrs[i].pcicptr);
468 }
469 }
470
tx4927_pcierr_interrupt(int irq,void * dev_id)471 irqreturn_t tx4927_pcierr_interrupt(int irq, void *dev_id)
472 {
473 struct pt_regs *regs = get_irq_regs();
474 struct tx4927_pcic_reg __iomem *pcicptr =
475 (struct tx4927_pcic_reg __iomem *)(unsigned long)dev_id;
476
477 if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) {
478 printk(KERN_WARNING "PCIERR interrupt at 0x%0*lx\n",
479 (int)(2 * sizeof(unsigned long)), regs->cp0_epc);
480 tx4927_report_pcic_status1(pcicptr);
481 }
482 if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) {
483 /* clear all pci errors */
484 __raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
485 | (TX4927_PCIC_PCISTATUS_ALL << 16),
486 &pcicptr->pcistatus);
487 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pstatus);
488 __raw_writel(TX4927_PCIC_PBASTATUS_ALL, &pcicptr->pbastatus);
489 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicstatus);
490 return IRQ_HANDLED;
491 }
492 console_verbose();
493 tx4927_dump_pcic_settings1(pcicptr);
494 panic("PCI error.");
495 }
496
497 #ifdef CONFIG_TOSHIBA_FPCIB0
tx4927_quirk_slc90e66_bridge(struct pci_dev * dev)498 static void tx4927_quirk_slc90e66_bridge(struct pci_dev *dev)
499 {
500 struct tx4927_pcic_reg __iomem *pcicptr = pci_bus_to_pcicptr(dev->bus);
501
502 if (!pcicptr)
503 return;
504 if (__raw_readl(&pcicptr->pbacfg) & TX4927_PCIC_PBACFG_PBAEN) {
505 /* Reset Bus Arbiter */
506 __raw_writel(TX4927_PCIC_PBACFG_RPBA, &pcicptr->pbacfg);
507 /*
508 * swap reqBP and reqXP (raise priority of SLC90E66).
509 * SLC90E66(PCI-ISA bridge) is connected to REQ2 on
510 * PCI Backplane board.
511 */
512 __raw_writel(0x72543610, &pcicptr->pbareqport);
513 __raw_writel(0, &pcicptr->pbabm);
514 /* Use Fixed ParkMaster (required by SLC90E66) */
515 __raw_writel(TX4927_PCIC_PBACFG_FIXPA, &pcicptr->pbacfg);
516 /* Enable Bus Arbiter */
517 __raw_writel(TX4927_PCIC_PBACFG_FIXPA |
518 TX4927_PCIC_PBACFG_PBAEN,
519 &pcicptr->pbacfg);
520 printk(KERN_INFO "PCI: Use Fixed Park Master (REQPORT %08x)\n",
521 __raw_readl(&pcicptr->pbareqport));
522 }
523 }
524 #define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
525 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_0,
526 tx4927_quirk_slc90e66_bridge);
527 #endif
528