2 * Define the pci_ops for the PCIC on Toshiba TX4927, TX4938, etc.
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.
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
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.
18 #include <linux/kernel.h>
19 #include <linux/interrupt.h>
20 #include <asm/txx9/pci.h>
21 #include <asm/txx9/tx4927pcic.h>
24 struct pci_controller
*channel
;
25 struct tx4927_pcic_reg __iomem
*pcicptr
;
26 } pcicptrs
[2]; /* TX4938 has 2 pcic */
28 static void __init
set_tx4927_pcicptr(struct pci_controller
*channel
,
29 struct tx4927_pcic_reg __iomem
*pcicptr
)
33 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
34 if (pcicptrs
[i
].channel
== channel
) {
35 pcicptrs
[i
].pcicptr
= pcicptr
;
39 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
40 if (!pcicptrs
[i
].channel
) {
41 pcicptrs
[i
].channel
= channel
;
42 pcicptrs
[i
].pcicptr
= pcicptr
;
49 struct tx4927_pcic_reg __iomem
*get_tx4927_pcicptr(
50 struct pci_controller
*channel
)
54 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
55 if (pcicptrs
[i
].channel
== channel
)
56 return pcicptrs
[i
].pcicptr
;
61 static int mkaddr(struct pci_bus
*bus
, unsigned int devfn
, int where
,
62 struct tx4927_pcic_reg __iomem
*pcicptr
)
64 if (bus
->parent
== NULL
&&
65 devfn
>= PCI_DEVFN(TX4927_PCIC_MAX_DEVNU
, 0))
67 __raw_writel(((bus
->number
& 0xff) << 0x10)
68 | ((devfn
& 0xff) << 0x08) | (where
& 0xfc)
69 | (bus
->parent
? 1 : 0),
70 &pcicptr
->g2pcfgadrs
);
71 /* clear M_ABORT and Disable M_ABORT Int. */
72 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
73 | (PCI_STATUS_REC_MASTER_ABORT
<< 16),
78 static int check_abort(struct tx4927_pcic_reg __iomem
*pcicptr
)
80 int code
= PCIBIOS_SUCCESSFUL
;
82 /* wait write cycle completion before checking error status */
83 while (__raw_readl(&pcicptr
->pcicstatus
) & TX4927_PCIC_PCICSTATUS_IWB
)
85 if (__raw_readl(&pcicptr
->pcistatus
)
86 & (PCI_STATUS_REC_MASTER_ABORT
<< 16)) {
87 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
88 | (PCI_STATUS_REC_MASTER_ABORT
<< 16),
90 /* flush write buffer */
92 code
= PCIBIOS_DEVICE_NOT_FOUND
;
97 static u8
icd_readb(int offset
, struct tx4927_pcic_reg __iomem
*pcicptr
)
102 return __raw_readb((void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
104 static u16
icd_readw(int offset
, struct tx4927_pcic_reg __iomem
*pcicptr
)
109 return __raw_readw((void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
111 static u32
icd_readl(struct tx4927_pcic_reg __iomem
*pcicptr
)
113 return __raw_readl(&pcicptr
->g2pcfgdata
);
115 static void icd_writeb(u8 val
, int offset
,
116 struct tx4927_pcic_reg __iomem
*pcicptr
)
121 __raw_writeb(val
, (void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
123 static void icd_writew(u16 val
, int offset
,
124 struct tx4927_pcic_reg __iomem
*pcicptr
)
129 __raw_writew(val
, (void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
131 static void icd_writel(u32 val
, struct tx4927_pcic_reg __iomem
*pcicptr
)
133 __raw_writel(val
, &pcicptr
->g2pcfgdata
);
136 static struct tx4927_pcic_reg __iomem
*pci_bus_to_pcicptr(struct pci_bus
*bus
)
138 struct pci_controller
*channel
= bus
->sysdata
;
139 return get_tx4927_pcicptr(channel
);
142 static int tx4927_pci_config_read(struct pci_bus
*bus
, unsigned int devfn
,
143 int where
, int size
, u32
*val
)
145 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(bus
);
147 if (mkaddr(bus
, devfn
, where
, pcicptr
)) {
153 *val
= icd_readb(where
& 3, pcicptr
);
156 *val
= icd_readw(where
& 3, pcicptr
);
159 *val
= icd_readl(pcicptr
);
161 return check_abort(pcicptr
);
164 static int tx4927_pci_config_write(struct pci_bus
*bus
, unsigned int devfn
,
165 int where
, int size
, u32 val
)
167 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(bus
);
169 if (mkaddr(bus
, devfn
, where
, pcicptr
))
173 icd_writeb(val
, where
& 3, pcicptr
);
176 icd_writew(val
, where
& 3, pcicptr
);
179 icd_writel(val
, pcicptr
);
181 return check_abort(pcicptr
);
184 static struct pci_ops tx4927_pci_ops
= {
185 .read
= tx4927_pci_config_read
,
186 .write
= tx4927_pci_config_write
,
193 } tx4927_pci_opts __devinitdata
= {
196 .gbwc
= 0xfe0, /* 4064 GBUSCLK for CCFG.GTOT=0b11 */
199 char *__devinit
tx4927_pcibios_setup(char *str
)
203 if (!strncmp(str
, "trdyto=", 7)) {
204 if (strict_strtoul(str
+ 7, 0, &val
) == 0)
205 tx4927_pci_opts
.trdyto
= val
;
208 if (!strncmp(str
, "retryto=", 8)) {
209 if (strict_strtoul(str
+ 8, 0, &val
) == 0)
210 tx4927_pci_opts
.retryto
= val
;
213 if (!strncmp(str
, "gbwc=", 5)) {
214 if (strict_strtoul(str
+ 5, 0, &val
) == 0)
215 tx4927_pci_opts
.gbwc
= val
;
221 void __init
tx4927_pcic_setup(struct tx4927_pcic_reg __iomem
*pcicptr
,
222 struct pci_controller
*channel
, int extarb
)
227 set_tx4927_pcicptr(channel
, pcicptr
);
229 if (!channel
->pci_ops
)
231 "PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:%s\n",
232 __raw_readl(&pcicptr
->pciid
) >> 16,
233 __raw_readl(&pcicptr
->pciid
) & 0xffff,
234 __raw_readl(&pcicptr
->pciccrev
) & 0xff,
235 extarb
? "External" : "Internal");
236 channel
->pci_ops
= &tx4927_pci_ops
;
238 local_irq_save(flags
);
240 /* Disable All Initiator Space */
241 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
242 & ~(TX4927_PCIC_PCICCFG_G2PMEN(0)
243 | TX4927_PCIC_PCICCFG_G2PMEN(1)
244 | TX4927_PCIC_PCICCFG_G2PMEN(2)
245 | TX4927_PCIC_PCICCFG_G2PIOEN
),
248 /* GB->PCI mappings */
249 __raw_writel((channel
->io_resource
->end
- channel
->io_resource
->start
)
251 &pcicptr
->g2piomask
);
252 ____raw_writeq((channel
->io_resource
->start
+
253 channel
->io_map_base
- IO_BASE
) |
255 TX4927_PCIC_G2PIOGBASE_ECHG
257 TX4927_PCIC_G2PIOGBASE_BSDIS
259 , &pcicptr
->g2piogbase
);
260 ____raw_writeq(channel
->io_resource
->start
- channel
->io_offset
,
261 &pcicptr
->g2piopbase
);
262 for (i
= 0; i
< 3; i
++) {
263 __raw_writel(0, &pcicptr
->g2pmmask
[i
]);
264 ____raw_writeq(0, &pcicptr
->g2pmgbase
[i
]);
265 ____raw_writeq(0, &pcicptr
->g2pmpbase
[i
]);
267 if (channel
->mem_resource
->end
) {
268 __raw_writel((channel
->mem_resource
->end
269 - channel
->mem_resource
->start
) >> 4,
270 &pcicptr
->g2pmmask
[0]);
271 ____raw_writeq(channel
->mem_resource
->start
|
273 TX4927_PCIC_G2PMnGBASE_ECHG
275 TX4927_PCIC_G2PMnGBASE_BSDIS
277 , &pcicptr
->g2pmgbase
[0]);
278 ____raw_writeq(channel
->mem_resource
->start
-
280 &pcicptr
->g2pmpbase
[0]);
282 /* PCI->GB mappings (I/O 256B) */
283 __raw_writel(0, &pcicptr
->p2giopbase
); /* 256B */
284 ____raw_writeq(0, &pcicptr
->p2giogbase
);
285 /* PCI->GB mappings (MEM 512MB (64MB on R1.x)) */
286 __raw_writel(0, &pcicptr
->p2gm0plbase
);
287 __raw_writel(0, &pcicptr
->p2gm0pubase
);
288 ____raw_writeq(TX4927_PCIC_P2GMnGBASE_TMEMEN
|
290 TX4927_PCIC_P2GMnGBASE_TECHG
292 TX4927_PCIC_P2GMnGBASE_TBSDIS
294 , &pcicptr
->p2gmgbase
[0]);
295 /* PCI->GB mappings (MEM 16MB) */
296 __raw_writel(0xffffffff, &pcicptr
->p2gm1plbase
);
297 __raw_writel(0xffffffff, &pcicptr
->p2gm1pubase
);
298 ____raw_writeq(0, &pcicptr
->p2gmgbase
[1]);
299 /* PCI->GB mappings (MEM 1MB) */
300 __raw_writel(0xffffffff, &pcicptr
->p2gm2pbase
); /* 1MB */
301 ____raw_writeq(0, &pcicptr
->p2gmgbase
[2]);
303 /* Clear all (including IRBER) except for GBWC */
304 __raw_writel((tx4927_pci_opts
.gbwc
<< 16)
305 & TX4927_PCIC_PCICCFG_GBWC_MASK
,
307 /* Enable Initiator Memory Space */
308 if (channel
->mem_resource
->end
)
309 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
310 | TX4927_PCIC_PCICCFG_G2PMEN(0),
312 /* Enable Initiator I/O Space */
313 if (channel
->io_resource
->end
)
314 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
315 | TX4927_PCIC_PCICCFG_G2PIOEN
,
317 /* Enable Initiator Config */
318 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
319 | TX4927_PCIC_PCICCFG_ICAEN
| TX4927_PCIC_PCICCFG_TCAR
,
322 /* Do not use MEMMUL, MEMINF: YMFPCI card causes M_ABORT. */
323 __raw_writel(0, &pcicptr
->pcicfg1
);
325 __raw_writel((__raw_readl(&pcicptr
->g2ptocnt
) & ~0xffff)
326 | (tx4927_pci_opts
.trdyto
& 0xff)
327 | ((tx4927_pci_opts
.retryto
& 0xff) << 8),
330 /* Clear All Local Bus Status */
331 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicstatus
);
332 /* Enable All Local Bus Interrupts */
333 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicmask
);
334 /* Clear All Initiator Status */
335 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pstatus
);
336 /* Enable All Initiator Interrupts */
337 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pmask
);
338 /* Clear All PCI Status Error */
339 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
340 | (TX4927_PCIC_PCISTATUS_ALL
<< 16),
341 &pcicptr
->pcistatus
);
342 /* Enable All PCI Status Error Interrupts */
343 __raw_writel(TX4927_PCIC_PCISTATUS_ALL
, &pcicptr
->pcimask
);
346 /* Reset Bus Arbiter */
347 __raw_writel(TX4927_PCIC_PBACFG_RPBA
, &pcicptr
->pbacfg
);
348 __raw_writel(0, &pcicptr
->pbabm
);
349 /* Enable Bus Arbiter */
350 __raw_writel(TX4927_PCIC_PBACFG_PBAEN
, &pcicptr
->pbacfg
);
353 __raw_writel(PCI_COMMAND_MASTER
| PCI_COMMAND_MEMORY
354 | PCI_COMMAND_PARITY
| PCI_COMMAND_SERR
,
355 &pcicptr
->pcistatus
);
356 local_irq_restore(flags
);
359 "PCI: COMMAND=%04x,PCIMASK=%04x,"
360 "TRDYTO=%02x,RETRYTO=%02x,GBWC=%03x\n",
361 __raw_readl(&pcicptr
->pcistatus
) & 0xffff,
362 __raw_readl(&pcicptr
->pcimask
) & 0xffff,
363 __raw_readl(&pcicptr
->g2ptocnt
) & 0xff,
364 (__raw_readl(&pcicptr
->g2ptocnt
) & 0xff00) >> 8,
365 (__raw_readl(&pcicptr
->pciccfg
) >> 16) & 0xfff);
368 static void tx4927_report_pcic_status1(struct tx4927_pcic_reg __iomem
*pcicptr
)
370 __u16 pcistatus
= (__u16
)(__raw_readl(&pcicptr
->pcistatus
) >> 16);
371 __u32 g2pstatus
= __raw_readl(&pcicptr
->g2pstatus
);
372 __u32 pcicstatus
= __raw_readl(&pcicptr
->pcicstatus
);
377 { PCI_STATUS_DETECTED_PARITY
, "DetectedParityError" },
378 { PCI_STATUS_SIG_SYSTEM_ERROR
, "SignaledSystemError" },
379 { PCI_STATUS_REC_MASTER_ABORT
, "ReceivedMasterAbort" },
380 { PCI_STATUS_REC_TARGET_ABORT
, "ReceivedTargetAbort" },
381 { PCI_STATUS_SIG_TARGET_ABORT
, "SignaledTargetAbort" },
382 { PCI_STATUS_PARITY
, "MasterParityError" },
384 { TX4927_PCIC_G2PSTATUS_TTOE
, "TIOE" },
385 { TX4927_PCIC_G2PSTATUS_RTOE
, "RTOE" },
386 }, pcicstat_tbl
[] = {
387 { TX4927_PCIC_PCICSTATUS_PME
, "PME" },
388 { TX4927_PCIC_PCICSTATUS_TLB
, "TLB" },
389 { TX4927_PCIC_PCICSTATUS_NIB
, "NIB" },
390 { TX4927_PCIC_PCICSTATUS_ZIB
, "ZIB" },
391 { TX4927_PCIC_PCICSTATUS_PERR
, "PERR" },
392 { TX4927_PCIC_PCICSTATUS_SERR
, "SERR" },
393 { TX4927_PCIC_PCICSTATUS_GBE
, "GBE" },
394 { TX4927_PCIC_PCICSTATUS_IWB
, "IWB" },
399 if (pcistatus
& TX4927_PCIC_PCISTATUS_ALL
) {
400 printk(KERN_CONT
"pcistat:%04x(", pcistatus
);
401 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(pcistat_tbl
); i
++)
402 if (pcistatus
& pcistat_tbl
[i
].flag
)
403 printk(KERN_CONT
"%s%s",
404 cont
++ ? " " : "", pcistat_tbl
[i
].str
);
405 printk(KERN_CONT
") ");
407 if (g2pstatus
& TX4927_PCIC_G2PSTATUS_ALL
) {
408 printk(KERN_CONT
"g2pstatus:%08x(", g2pstatus
);
409 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(g2pstat_tbl
); i
++)
410 if (g2pstatus
& g2pstat_tbl
[i
].flag
)
411 printk(KERN_CONT
"%s%s",
412 cont
++ ? " " : "", g2pstat_tbl
[i
].str
);
413 printk(KERN_CONT
") ");
415 if (pcicstatus
& TX4927_PCIC_PCICSTATUS_ALL
) {
416 printk(KERN_CONT
"pcicstatus:%08x(", pcicstatus
);
417 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(pcicstat_tbl
); i
++)
418 if (pcicstatus
& pcicstat_tbl
[i
].flag
)
419 printk(KERN_CONT
"%s%s",
420 cont
++ ? " " : "", pcicstat_tbl
[i
].str
);
421 printk(KERN_CONT
")");
423 printk(KERN_CONT
"\n");
426 void tx4927_report_pcic_status(void)
430 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
431 if (pcicptrs
[i
].pcicptr
)
432 tx4927_report_pcic_status1(pcicptrs
[i
].pcicptr
);
436 static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem
*pcicptr
)
439 __u32 __iomem
*preg
= (__u32 __iomem
*)pcicptr
;
441 printk(KERN_INFO
"tx4927 pcic (0x%p) settings:", pcicptr
);
442 for (i
= 0; i
< sizeof(struct tx4927_pcic_reg
); i
+= 4, preg
++) {
444 printk(KERN_CONT
"\n");
445 printk(KERN_INFO
"%04x:", i
);
447 /* skip registers with side-effects */
448 if (i
== offsetof(struct tx4927_pcic_reg
, g2pintack
)
449 || i
== offsetof(struct tx4927_pcic_reg
, g2pspc
)
450 || i
== offsetof(struct tx4927_pcic_reg
, g2pcfgadrs
)
451 || i
== offsetof(struct tx4927_pcic_reg
, g2pcfgdata
)) {
452 printk(KERN_CONT
" XXXXXXXX");
455 printk(KERN_CONT
" %08x", __raw_readl(preg
));
457 printk(KERN_CONT
"\n");
460 void tx4927_dump_pcic_settings(void)
464 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
465 if (pcicptrs
[i
].pcicptr
)
466 tx4927_dump_pcic_settings1(pcicptrs
[i
].pcicptr
);
470 irqreturn_t
tx4927_pcierr_interrupt(int irq
, void *dev_id
)
472 struct pt_regs
*regs
= get_irq_regs();
473 struct tx4927_pcic_reg __iomem
*pcicptr
=
474 (struct tx4927_pcic_reg __iomem
*)(unsigned long)dev_id
;
476 if (txx9_pci_err_action
!= TXX9_PCI_ERR_IGNORE
) {
477 printk(KERN_WARNING
"PCIERR interrupt at 0x%0*lx\n",
478 (int)(2 * sizeof(unsigned long)), regs
->cp0_epc
);
479 tx4927_report_pcic_status1(pcicptr
);
481 if (txx9_pci_err_action
!= TXX9_PCI_ERR_PANIC
) {
482 /* clear all pci errors */
483 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
484 | (TX4927_PCIC_PCISTATUS_ALL
<< 16),
485 &pcicptr
->pcistatus
);
486 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pstatus
);
487 __raw_writel(TX4927_PCIC_PBASTATUS_ALL
, &pcicptr
->pbastatus
);
488 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicstatus
);
492 tx4927_dump_pcic_settings1(pcicptr
);
496 #ifdef CONFIG_TOSHIBA_FPCIB0
497 static void __init
tx4927_quirk_slc90e66_bridge(struct pci_dev
*dev
)
499 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(dev
->bus
);
503 if (__raw_readl(&pcicptr
->pbacfg
) & TX4927_PCIC_PBACFG_PBAEN
) {
504 /* Reset Bus Arbiter */
505 __raw_writel(TX4927_PCIC_PBACFG_RPBA
, &pcicptr
->pbacfg
);
507 * swap reqBP and reqXP (raise priority of SLC90E66).
508 * SLC90E66(PCI-ISA bridge) is connected to REQ2 on
509 * PCI Backplane board.
511 __raw_writel(0x72543610, &pcicptr
->pbareqport
);
512 __raw_writel(0, &pcicptr
->pbabm
);
513 /* Use Fixed ParkMaster (required by SLC90E66) */
514 __raw_writel(TX4927_PCIC_PBACFG_FIXPA
, &pcicptr
->pbacfg
);
515 /* Enable Bus Arbiter */
516 __raw_writel(TX4927_PCIC_PBACFG_FIXPA
|
517 TX4927_PCIC_PBACFG_PBAEN
,
519 printk(KERN_INFO
"PCI: Use Fixed Park Master (REQPORT %08x)\n",
520 __raw_readl(&pcicptr
->pbareqport
));
523 #define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
524 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR
, PCI_DEVICE_ID_EFAR_SLC90E66_0
,
525 tx4927_quirk_slc90e66_bridge
);