xref: /linux/arch/mips/pci/ops-tx4927.c (revision 60e13231561b3a4c5269bfa1ef6c0569ad6f28ec)
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 
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 
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 
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 
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 
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 }
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 }
112 static u32 icd_readl(struct tx4927_pcic_reg __iomem *pcicptr)
113 {
114 	return __raw_readl(&pcicptr->g2pcfgdata);
115 }
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 }
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 }
132 static void icd_writel(u32 val, struct tx4927_pcic_reg __iomem *pcicptr)
133 {
134 	__raw_writel(val, &pcicptr->g2pcfgdata);
135 }
136 
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 
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 
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 __devinitdata = {
195 	.trdyto = 0,
196 	.retryto = 0,
197 	.gbwc = 0xfe0,	/* 4064 GBUSCLK for CCFG.GTOT=0b11 */
198 };
199 
200 char *__devinit 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 
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 
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 
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 
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 
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 
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
498 static void __init 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