1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Define the pci_ops for the PCIC on Toshiba TX4927, TX4938, etc.
5 * Based on linux/arch/mips/pci/ops-tx4938.c,
6 * linux/arch/mips/pci/fixup-rbtx4938.c,
7 * linux/arch/mips/txx9/rbtx4938/setup.c,
8 * and RBTX49xx patch from CELF patch archive.
10 * 2003-2005 (c) MontaVista Software, Inc.
11 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
12 * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
14 #include <linux/kernel.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <asm/txx9/pci.h>
18 #include <asm/txx9/tx4927pcic.h>
21 struct pci_controller
*channel
;
22 struct tx4927_pcic_reg __iomem
*pcicptr
;
23 } pcicptrs
[2]; /* TX4938 has 2 pcic */
25 static void __init
set_tx4927_pcicptr(struct pci_controller
*channel
,
26 struct tx4927_pcic_reg __iomem
*pcicptr
)
30 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
31 if (pcicptrs
[i
].channel
== channel
) {
32 pcicptrs
[i
].pcicptr
= pcicptr
;
36 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
37 if (!pcicptrs
[i
].channel
) {
38 pcicptrs
[i
].channel
= channel
;
39 pcicptrs
[i
].pcicptr
= pcicptr
;
46 struct tx4927_pcic_reg __iomem
*get_tx4927_pcicptr(
47 struct pci_controller
*channel
)
51 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
52 if (pcicptrs
[i
].channel
== channel
)
53 return pcicptrs
[i
].pcicptr
;
58 static int mkaddr(struct pci_bus
*bus
, unsigned int devfn
, int where
,
59 struct tx4927_pcic_reg __iomem
*pcicptr
)
61 if (bus
->parent
== NULL
&&
62 devfn
>= PCI_DEVFN(TX4927_PCIC_MAX_DEVNU
, 0))
63 return PCIBIOS_DEVICE_NOT_FOUND
;
64 __raw_writel(((bus
->number
& 0xff) << 0x10)
65 | ((devfn
& 0xff) << 0x08) | (where
& 0xfc)
66 | (bus
->parent
? 1 : 0),
67 &pcicptr
->g2pcfgadrs
);
68 /* clear M_ABORT and Disable M_ABORT Int. */
69 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
70 | (PCI_STATUS_REC_MASTER_ABORT
<< 16),
72 return PCIBIOS_SUCCESSFUL
;
75 static int check_abort(struct tx4927_pcic_reg __iomem
*pcicptr
)
77 int code
= PCIBIOS_SUCCESSFUL
;
79 /* wait write cycle completion before checking error status */
80 while (__raw_readl(&pcicptr
->pcicstatus
) & TX4927_PCIC_PCICSTATUS_IWB
)
82 if (__raw_readl(&pcicptr
->pcistatus
)
83 & (PCI_STATUS_REC_MASTER_ABORT
<< 16)) {
84 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
85 | (PCI_STATUS_REC_MASTER_ABORT
<< 16),
87 /* flush write buffer */
89 code
= PCIBIOS_DEVICE_NOT_FOUND
;
94 static u8
icd_readb(int offset
, struct tx4927_pcic_reg __iomem
*pcicptr
)
99 return __raw_readb((void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
101 static u16
icd_readw(int offset
, struct tx4927_pcic_reg __iomem
*pcicptr
)
106 return __raw_readw((void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
108 static u32
icd_readl(struct tx4927_pcic_reg __iomem
*pcicptr
)
110 return __raw_readl(&pcicptr
->g2pcfgdata
);
112 static void icd_writeb(u8 val
, int offset
,
113 struct tx4927_pcic_reg __iomem
*pcicptr
)
118 __raw_writeb(val
, (void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
120 static void icd_writew(u16 val
, int offset
,
121 struct tx4927_pcic_reg __iomem
*pcicptr
)
126 __raw_writew(val
, (void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
128 static void icd_writel(u32 val
, struct tx4927_pcic_reg __iomem
*pcicptr
)
130 __raw_writel(val
, &pcicptr
->g2pcfgdata
);
133 static struct tx4927_pcic_reg __iomem
*pci_bus_to_pcicptr(struct pci_bus
*bus
)
135 struct pci_controller
*channel
= bus
->sysdata
;
136 return get_tx4927_pcicptr(channel
);
139 static int tx4927_pci_config_read(struct pci_bus
*bus
, unsigned int devfn
,
140 int where
, int size
, u32
*val
)
142 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(bus
);
145 ret
= mkaddr(bus
, devfn
, where
, pcicptr
);
146 if (ret
!= PCIBIOS_SUCCESSFUL
) {
147 PCI_SET_ERROR_RESPONSE(val
);
152 *val
= icd_readb(where
& 3, pcicptr
);
155 *val
= icd_readw(where
& 3, pcicptr
);
158 *val
= icd_readl(pcicptr
);
160 return check_abort(pcicptr
);
163 static int tx4927_pci_config_write(struct pci_bus
*bus
, unsigned int devfn
,
164 int where
, int size
, u32 val
)
166 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(bus
);
169 ret
= mkaddr(bus
, devfn
, where
, pcicptr
);
170 if (ret
!= PCIBIOS_SUCCESSFUL
)
174 icd_writeb(val
, where
& 3, pcicptr
);
177 icd_writew(val
, where
& 3, pcicptr
);
180 icd_writel(val
, pcicptr
);
182 return check_abort(pcicptr
);
185 static struct pci_ops tx4927_pci_ops
= {
186 .read
= tx4927_pci_config_read
,
187 .write
= tx4927_pci_config_write
,
194 } tx4927_pci_opts
= {
197 .gbwc
= 0xfe0, /* 4064 GBUSCLK for CCFG.GTOT=0b11 */
200 char *tx4927_pcibios_setup(char *str
)
202 if (!strncmp(str
, "trdyto=", 7)) {
204 if (kstrtou8(str
+ 7, 0, &val
) == 0)
205 tx4927_pci_opts
.trdyto
= val
;
208 if (!strncmp(str
, "retryto=", 8)) {
210 if (kstrtou8(str
+ 8, 0, &val
) == 0)
211 tx4927_pci_opts
.retryto
= val
;
214 if (!strncmp(str
, "gbwc=", 5)) {
216 if (kstrtou16(str
+ 5, 0, &val
) == 0)
217 tx4927_pci_opts
.gbwc
= val
;
223 void __init
tx4927_pcic_setup(struct tx4927_pcic_reg __iomem
*pcicptr
,
224 struct pci_controller
*channel
, int extarb
)
229 set_tx4927_pcicptr(channel
, pcicptr
);
231 if (!channel
->pci_ops
)
233 "PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:%s\n",
234 __raw_readl(&pcicptr
->pciid
) >> 16,
235 __raw_readl(&pcicptr
->pciid
) & 0xffff,
236 __raw_readl(&pcicptr
->pciccrev
) & 0xff,
237 extarb
? "External" : "Internal");
238 channel
->pci_ops
= &tx4927_pci_ops
;
240 local_irq_save(flags
);
242 /* Disable All Initiator Space */
243 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
244 & ~(TX4927_PCIC_PCICCFG_G2PMEN(0)
245 | TX4927_PCIC_PCICCFG_G2PMEN(1)
246 | TX4927_PCIC_PCICCFG_G2PMEN(2)
247 | TX4927_PCIC_PCICCFG_G2PIOEN
),
250 /* GB->PCI mappings */
251 __raw_writel((channel
->io_resource
->end
- channel
->io_resource
->start
)
253 &pcicptr
->g2piomask
);
254 ____raw_writeq((channel
->io_resource
->start
+
255 channel
->io_map_base
- IO_BASE
) |
257 TX4927_PCIC_G2PIOGBASE_ECHG
259 TX4927_PCIC_G2PIOGBASE_BSDIS
261 , &pcicptr
->g2piogbase
);
262 ____raw_writeq(channel
->io_resource
->start
- channel
->io_offset
,
263 &pcicptr
->g2piopbase
);
264 for (i
= 0; i
< 3; i
++) {
265 __raw_writel(0, &pcicptr
->g2pmmask
[i
]);
266 ____raw_writeq(0, &pcicptr
->g2pmgbase
[i
]);
267 ____raw_writeq(0, &pcicptr
->g2pmpbase
[i
]);
269 if (channel
->mem_resource
->end
) {
270 __raw_writel((channel
->mem_resource
->end
271 - channel
->mem_resource
->start
) >> 4,
272 &pcicptr
->g2pmmask
[0]);
273 ____raw_writeq(channel
->mem_resource
->start
|
275 TX4927_PCIC_G2PMnGBASE_ECHG
277 TX4927_PCIC_G2PMnGBASE_BSDIS
279 , &pcicptr
->g2pmgbase
[0]);
280 ____raw_writeq(channel
->mem_resource
->start
-
282 &pcicptr
->g2pmpbase
[0]);
284 /* PCI->GB mappings (I/O 256B) */
285 __raw_writel(0, &pcicptr
->p2giopbase
); /* 256B */
286 ____raw_writeq(0, &pcicptr
->p2giogbase
);
287 /* PCI->GB mappings (MEM 512MB (64MB on R1.x)) */
288 __raw_writel(0, &pcicptr
->p2gm0plbase
);
289 __raw_writel(0, &pcicptr
->p2gm0pubase
);
290 ____raw_writeq(TX4927_PCIC_P2GMnGBASE_TMEMEN
|
292 TX4927_PCIC_P2GMnGBASE_TECHG
294 TX4927_PCIC_P2GMnGBASE_TBSDIS
296 , &pcicptr
->p2gmgbase
[0]);
297 /* PCI->GB mappings (MEM 16MB) */
298 __raw_writel(0xffffffff, &pcicptr
->p2gm1plbase
);
299 __raw_writel(0xffffffff, &pcicptr
->p2gm1pubase
);
300 ____raw_writeq(0, &pcicptr
->p2gmgbase
[1]);
301 /* PCI->GB mappings (MEM 1MB) */
302 __raw_writel(0xffffffff, &pcicptr
->p2gm2pbase
); /* 1MB */
303 ____raw_writeq(0, &pcicptr
->p2gmgbase
[2]);
305 /* Clear all (including IRBER) except for GBWC */
306 __raw_writel((tx4927_pci_opts
.gbwc
<< 16)
307 & TX4927_PCIC_PCICCFG_GBWC_MASK
,
309 /* Enable Initiator Memory Space */
310 if (channel
->mem_resource
->end
)
311 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
312 | TX4927_PCIC_PCICCFG_G2PMEN(0),
314 /* Enable Initiator I/O Space */
315 if (channel
->io_resource
->end
)
316 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
317 | TX4927_PCIC_PCICCFG_G2PIOEN
,
319 /* Enable Initiator Config */
320 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
321 | TX4927_PCIC_PCICCFG_ICAEN
| TX4927_PCIC_PCICCFG_TCAR
,
324 /* Do not use MEMMUL, MEMINF: YMFPCI card causes M_ABORT. */
325 __raw_writel(0, &pcicptr
->pcicfg1
);
327 __raw_writel((__raw_readl(&pcicptr
->g2ptocnt
) & ~0xffff)
328 | (tx4927_pci_opts
.trdyto
& 0xff)
329 | ((tx4927_pci_opts
.retryto
& 0xff) << 8),
332 /* Clear All Local Bus Status */
333 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicstatus
);
334 /* Enable All Local Bus Interrupts */
335 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicmask
);
336 /* Clear All Initiator Status */
337 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pstatus
);
338 /* Enable All Initiator Interrupts */
339 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pmask
);
340 /* Clear All PCI Status Error */
341 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
342 | (TX4927_PCIC_PCISTATUS_ALL
<< 16),
343 &pcicptr
->pcistatus
);
344 /* Enable All PCI Status Error Interrupts */
345 __raw_writel(TX4927_PCIC_PCISTATUS_ALL
, &pcicptr
->pcimask
);
348 /* Reset Bus Arbiter */
349 __raw_writel(TX4927_PCIC_PBACFG_RPBA
, &pcicptr
->pbacfg
);
350 __raw_writel(0, &pcicptr
->pbabm
);
351 /* Enable Bus Arbiter */
352 __raw_writel(TX4927_PCIC_PBACFG_PBAEN
, &pcicptr
->pbacfg
);
355 __raw_writel(PCI_COMMAND_MASTER
| PCI_COMMAND_MEMORY
356 | PCI_COMMAND_PARITY
| PCI_COMMAND_SERR
,
357 &pcicptr
->pcistatus
);
358 local_irq_restore(flags
);
361 "PCI: COMMAND=%04x,PCIMASK=%04x,"
362 "TRDYTO=%02x,RETRYTO=%02x,GBWC=%03x\n",
363 __raw_readl(&pcicptr
->pcistatus
) & 0xffff,
364 __raw_readl(&pcicptr
->pcimask
) & 0xffff,
365 __raw_readl(&pcicptr
->g2ptocnt
) & 0xff,
366 (__raw_readl(&pcicptr
->g2ptocnt
) & 0xff00) >> 8,
367 (__raw_readl(&pcicptr
->pciccfg
) >> 16) & 0xfff);
370 static void tx4927_report_pcic_status1(struct tx4927_pcic_reg __iomem
*pcicptr
)
372 __u16 pcistatus
= (__u16
)(__raw_readl(&pcicptr
->pcistatus
) >> 16);
373 __u32 g2pstatus
= __raw_readl(&pcicptr
->g2pstatus
);
374 __u32 pcicstatus
= __raw_readl(&pcicptr
->pcicstatus
);
379 { PCI_STATUS_DETECTED_PARITY
, "DetectedParityError" },
380 { PCI_STATUS_SIG_SYSTEM_ERROR
, "SignaledSystemError" },
381 { PCI_STATUS_REC_MASTER_ABORT
, "ReceivedMasterAbort" },
382 { PCI_STATUS_REC_TARGET_ABORT
, "ReceivedTargetAbort" },
383 { PCI_STATUS_SIG_TARGET_ABORT
, "SignaledTargetAbort" },
384 { PCI_STATUS_PARITY
, "MasterParityError" },
386 { TX4927_PCIC_G2PSTATUS_TTOE
, "TIOE" },
387 { TX4927_PCIC_G2PSTATUS_RTOE
, "RTOE" },
388 }, pcicstat_tbl
[] = {
389 { TX4927_PCIC_PCICSTATUS_PME
, "PME" },
390 { TX4927_PCIC_PCICSTATUS_TLB
, "TLB" },
391 { TX4927_PCIC_PCICSTATUS_NIB
, "NIB" },
392 { TX4927_PCIC_PCICSTATUS_ZIB
, "ZIB" },
393 { TX4927_PCIC_PCICSTATUS_PERR
, "PERR" },
394 { TX4927_PCIC_PCICSTATUS_SERR
, "SERR" },
395 { TX4927_PCIC_PCICSTATUS_GBE
, "GBE" },
396 { TX4927_PCIC_PCICSTATUS_IWB
, "IWB" },
401 if (pcistatus
& TX4927_PCIC_PCISTATUS_ALL
) {
402 printk(KERN_CONT
"pcistat:%04x(", pcistatus
);
403 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(pcistat_tbl
); i
++)
404 if (pcistatus
& pcistat_tbl
[i
].flag
)
405 printk(KERN_CONT
"%s%s",
406 cont
++ ? " " : "", pcistat_tbl
[i
].str
);
407 printk(KERN_CONT
") ");
409 if (g2pstatus
& TX4927_PCIC_G2PSTATUS_ALL
) {
410 printk(KERN_CONT
"g2pstatus:%08x(", g2pstatus
);
411 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(g2pstat_tbl
); i
++)
412 if (g2pstatus
& g2pstat_tbl
[i
].flag
)
413 printk(KERN_CONT
"%s%s",
414 cont
++ ? " " : "", g2pstat_tbl
[i
].str
);
415 printk(KERN_CONT
") ");
417 if (pcicstatus
& TX4927_PCIC_PCICSTATUS_ALL
) {
418 printk(KERN_CONT
"pcicstatus:%08x(", pcicstatus
);
419 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(pcicstat_tbl
); i
++)
420 if (pcicstatus
& pcicstat_tbl
[i
].flag
)
421 printk(KERN_CONT
"%s%s",
422 cont
++ ? " " : "", pcicstat_tbl
[i
].str
);
423 printk(KERN_CONT
")");
425 printk(KERN_CONT
"\n");
428 void tx4927_report_pcic_status(void)
432 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
433 if (pcicptrs
[i
].pcicptr
)
434 tx4927_report_pcic_status1(pcicptrs
[i
].pcicptr
);
438 static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem
*pcicptr
)
441 __u32 __iomem
*preg
= (__u32 __iomem
*)pcicptr
;
443 printk(KERN_INFO
"tx4927 pcic (0x%p) settings:", pcicptr
);
444 for (i
= 0; i
< sizeof(struct tx4927_pcic_reg
); i
+= 4, preg
++) {
446 printk(KERN_CONT
"\n");
447 printk(KERN_INFO
"%04x:", i
);
449 /* skip registers with side-effects */
450 if (i
== offsetof(struct tx4927_pcic_reg
, g2pintack
)
451 || i
== offsetof(struct tx4927_pcic_reg
, g2pspc
)
452 || i
== offsetof(struct tx4927_pcic_reg
, g2pcfgadrs
)
453 || i
== offsetof(struct tx4927_pcic_reg
, g2pcfgdata
)) {
454 printk(KERN_CONT
" XXXXXXXX");
457 printk(KERN_CONT
" %08x", __raw_readl(preg
));
459 printk(KERN_CONT
"\n");
462 void tx4927_dump_pcic_settings(void)
466 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
467 if (pcicptrs
[i
].pcicptr
)
468 tx4927_dump_pcic_settings1(pcicptrs
[i
].pcicptr
);
472 irqreturn_t
tx4927_pcierr_interrupt(int irq
, void *dev_id
)
474 struct pt_regs
*regs
= get_irq_regs();
475 struct tx4927_pcic_reg __iomem
*pcicptr
=
476 (struct tx4927_pcic_reg __iomem
*)(unsigned long)dev_id
;
478 if (txx9_pci_err_action
!= TXX9_PCI_ERR_IGNORE
) {
479 printk(KERN_WARNING
"PCIERR interrupt at 0x%0*lx\n",
480 (int)(2 * sizeof(unsigned long)), regs
->cp0_epc
);
481 tx4927_report_pcic_status1(pcicptr
);
483 if (txx9_pci_err_action
!= TXX9_PCI_ERR_PANIC
) {
484 /* clear all pci errors */
485 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
486 | (TX4927_PCIC_PCISTATUS_ALL
<< 16),
487 &pcicptr
->pcistatus
);
488 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pstatus
);
489 __raw_writel(TX4927_PCIC_PBASTATUS_ALL
, &pcicptr
->pbastatus
);
490 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicstatus
);
494 tx4927_dump_pcic_settings1(pcicptr
);
498 #ifdef CONFIG_TOSHIBA_FPCIB0
499 static void tx4927_quirk_slc90e66_bridge(struct pci_dev
*dev
)
501 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(dev
->bus
);
505 if (__raw_readl(&pcicptr
->pbacfg
) & TX4927_PCIC_PBACFG_PBAEN
) {
506 /* Reset Bus Arbiter */
507 __raw_writel(TX4927_PCIC_PBACFG_RPBA
, &pcicptr
->pbacfg
);
509 * swap reqBP and reqXP (raise priority of SLC90E66).
510 * SLC90E66(PCI-ISA bridge) is connected to REQ2 on
511 * PCI Backplane board.
513 __raw_writel(0x72543610, &pcicptr
->pbareqport
);
514 __raw_writel(0, &pcicptr
->pbabm
);
515 /* Use Fixed ParkMaster (required by SLC90E66) */
516 __raw_writel(TX4927_PCIC_PBACFG_FIXPA
, &pcicptr
->pbacfg
);
517 /* Enable Bus Arbiter */
518 __raw_writel(TX4927_PCIC_PBACFG_FIXPA
|
519 TX4927_PCIC_PBACFG_PBAEN
,
521 printk(KERN_INFO
"PCI: Use Fixed Park Master (REQPORT %08x)\n",
522 __raw_readl(&pcicptr
->pbareqport
));
525 #define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
526 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR
, PCI_DEVICE_ID_EFAR_SLC90E66_0
,
527 tx4927_quirk_slc90e66_bridge
);