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))
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),
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
);
144 if (mkaddr(bus
, devfn
, where
, pcicptr
)) {
150 *val
= icd_readb(where
& 3, pcicptr
);
153 *val
= icd_readw(where
& 3, pcicptr
);
156 *val
= icd_readl(pcicptr
);
158 return check_abort(pcicptr
);
161 static int tx4927_pci_config_write(struct pci_bus
*bus
, unsigned int devfn
,
162 int where
, int size
, u32 val
)
164 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(bus
);
166 if (mkaddr(bus
, devfn
, where
, pcicptr
))
170 icd_writeb(val
, where
& 3, pcicptr
);
173 icd_writew(val
, where
& 3, pcicptr
);
176 icd_writel(val
, pcicptr
);
178 return check_abort(pcicptr
);
181 static struct pci_ops tx4927_pci_ops
= {
182 .read
= tx4927_pci_config_read
,
183 .write
= tx4927_pci_config_write
,
190 } tx4927_pci_opts
= {
193 .gbwc
= 0xfe0, /* 4064 GBUSCLK for CCFG.GTOT=0b11 */
196 char *tx4927_pcibios_setup(char *str
)
198 if (!strncmp(str
, "trdyto=", 7)) {
200 if (kstrtou8(str
+ 7, 0, &val
) == 0)
201 tx4927_pci_opts
.trdyto
= val
;
204 if (!strncmp(str
, "retryto=", 8)) {
206 if (kstrtou8(str
+ 8, 0, &val
) == 0)
207 tx4927_pci_opts
.retryto
= val
;
210 if (!strncmp(str
, "gbwc=", 5)) {
212 if (kstrtou16(str
+ 5, 0, &val
) == 0)
213 tx4927_pci_opts
.gbwc
= val
;
219 void __init
tx4927_pcic_setup(struct tx4927_pcic_reg __iomem
*pcicptr
,
220 struct pci_controller
*channel
, int extarb
)
225 set_tx4927_pcicptr(channel
, pcicptr
);
227 if (!channel
->pci_ops
)
229 "PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:%s\n",
230 __raw_readl(&pcicptr
->pciid
) >> 16,
231 __raw_readl(&pcicptr
->pciid
) & 0xffff,
232 __raw_readl(&pcicptr
->pciccrev
) & 0xff,
233 extarb
? "External" : "Internal");
234 channel
->pci_ops
= &tx4927_pci_ops
;
236 local_irq_save(flags
);
238 /* Disable All Initiator Space */
239 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
240 & ~(TX4927_PCIC_PCICCFG_G2PMEN(0)
241 | TX4927_PCIC_PCICCFG_G2PMEN(1)
242 | TX4927_PCIC_PCICCFG_G2PMEN(2)
243 | TX4927_PCIC_PCICCFG_G2PIOEN
),
246 /* GB->PCI mappings */
247 __raw_writel((channel
->io_resource
->end
- channel
->io_resource
->start
)
249 &pcicptr
->g2piomask
);
250 ____raw_writeq((channel
->io_resource
->start
+
251 channel
->io_map_base
- IO_BASE
) |
253 TX4927_PCIC_G2PIOGBASE_ECHG
255 TX4927_PCIC_G2PIOGBASE_BSDIS
257 , &pcicptr
->g2piogbase
);
258 ____raw_writeq(channel
->io_resource
->start
- channel
->io_offset
,
259 &pcicptr
->g2piopbase
);
260 for (i
= 0; i
< 3; i
++) {
261 __raw_writel(0, &pcicptr
->g2pmmask
[i
]);
262 ____raw_writeq(0, &pcicptr
->g2pmgbase
[i
]);
263 ____raw_writeq(0, &pcicptr
->g2pmpbase
[i
]);
265 if (channel
->mem_resource
->end
) {
266 __raw_writel((channel
->mem_resource
->end
267 - channel
->mem_resource
->start
) >> 4,
268 &pcicptr
->g2pmmask
[0]);
269 ____raw_writeq(channel
->mem_resource
->start
|
271 TX4927_PCIC_G2PMnGBASE_ECHG
273 TX4927_PCIC_G2PMnGBASE_BSDIS
275 , &pcicptr
->g2pmgbase
[0]);
276 ____raw_writeq(channel
->mem_resource
->start
-
278 &pcicptr
->g2pmpbase
[0]);
280 /* PCI->GB mappings (I/O 256B) */
281 __raw_writel(0, &pcicptr
->p2giopbase
); /* 256B */
282 ____raw_writeq(0, &pcicptr
->p2giogbase
);
283 /* PCI->GB mappings (MEM 512MB (64MB on R1.x)) */
284 __raw_writel(0, &pcicptr
->p2gm0plbase
);
285 __raw_writel(0, &pcicptr
->p2gm0pubase
);
286 ____raw_writeq(TX4927_PCIC_P2GMnGBASE_TMEMEN
|
288 TX4927_PCIC_P2GMnGBASE_TECHG
290 TX4927_PCIC_P2GMnGBASE_TBSDIS
292 , &pcicptr
->p2gmgbase
[0]);
293 /* PCI->GB mappings (MEM 16MB) */
294 __raw_writel(0xffffffff, &pcicptr
->p2gm1plbase
);
295 __raw_writel(0xffffffff, &pcicptr
->p2gm1pubase
);
296 ____raw_writeq(0, &pcicptr
->p2gmgbase
[1]);
297 /* PCI->GB mappings (MEM 1MB) */
298 __raw_writel(0xffffffff, &pcicptr
->p2gm2pbase
); /* 1MB */
299 ____raw_writeq(0, &pcicptr
->p2gmgbase
[2]);
301 /* Clear all (including IRBER) except for GBWC */
302 __raw_writel((tx4927_pci_opts
.gbwc
<< 16)
303 & TX4927_PCIC_PCICCFG_GBWC_MASK
,
305 /* Enable Initiator Memory Space */
306 if (channel
->mem_resource
->end
)
307 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
308 | TX4927_PCIC_PCICCFG_G2PMEN(0),
310 /* Enable Initiator I/O Space */
311 if (channel
->io_resource
->end
)
312 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
313 | TX4927_PCIC_PCICCFG_G2PIOEN
,
315 /* Enable Initiator Config */
316 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
317 | TX4927_PCIC_PCICCFG_ICAEN
| TX4927_PCIC_PCICCFG_TCAR
,
320 /* Do not use MEMMUL, MEMINF: YMFPCI card causes M_ABORT. */
321 __raw_writel(0, &pcicptr
->pcicfg1
);
323 __raw_writel((__raw_readl(&pcicptr
->g2ptocnt
) & ~0xffff)
324 | (tx4927_pci_opts
.trdyto
& 0xff)
325 | ((tx4927_pci_opts
.retryto
& 0xff) << 8),
328 /* Clear All Local Bus Status */
329 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicstatus
);
330 /* Enable All Local Bus Interrupts */
331 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicmask
);
332 /* Clear All Initiator Status */
333 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pstatus
);
334 /* Enable All Initiator Interrupts */
335 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pmask
);
336 /* Clear All PCI Status Error */
337 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
338 | (TX4927_PCIC_PCISTATUS_ALL
<< 16),
339 &pcicptr
->pcistatus
);
340 /* Enable All PCI Status Error Interrupts */
341 __raw_writel(TX4927_PCIC_PCISTATUS_ALL
, &pcicptr
->pcimask
);
344 /* Reset Bus Arbiter */
345 __raw_writel(TX4927_PCIC_PBACFG_RPBA
, &pcicptr
->pbacfg
);
346 __raw_writel(0, &pcicptr
->pbabm
);
347 /* Enable Bus Arbiter */
348 __raw_writel(TX4927_PCIC_PBACFG_PBAEN
, &pcicptr
->pbacfg
);
351 __raw_writel(PCI_COMMAND_MASTER
| PCI_COMMAND_MEMORY
352 | PCI_COMMAND_PARITY
| PCI_COMMAND_SERR
,
353 &pcicptr
->pcistatus
);
354 local_irq_restore(flags
);
357 "PCI: COMMAND=%04x,PCIMASK=%04x,"
358 "TRDYTO=%02x,RETRYTO=%02x,GBWC=%03x\n",
359 __raw_readl(&pcicptr
->pcistatus
) & 0xffff,
360 __raw_readl(&pcicptr
->pcimask
) & 0xffff,
361 __raw_readl(&pcicptr
->g2ptocnt
) & 0xff,
362 (__raw_readl(&pcicptr
->g2ptocnt
) & 0xff00) >> 8,
363 (__raw_readl(&pcicptr
->pciccfg
) >> 16) & 0xfff);
366 static void tx4927_report_pcic_status1(struct tx4927_pcic_reg __iomem
*pcicptr
)
368 __u16 pcistatus
= (__u16
)(__raw_readl(&pcicptr
->pcistatus
) >> 16);
369 __u32 g2pstatus
= __raw_readl(&pcicptr
->g2pstatus
);
370 __u32 pcicstatus
= __raw_readl(&pcicptr
->pcicstatus
);
375 { PCI_STATUS_DETECTED_PARITY
, "DetectedParityError" },
376 { PCI_STATUS_SIG_SYSTEM_ERROR
, "SignaledSystemError" },
377 { PCI_STATUS_REC_MASTER_ABORT
, "ReceivedMasterAbort" },
378 { PCI_STATUS_REC_TARGET_ABORT
, "ReceivedTargetAbort" },
379 { PCI_STATUS_SIG_TARGET_ABORT
, "SignaledTargetAbort" },
380 { PCI_STATUS_PARITY
, "MasterParityError" },
382 { TX4927_PCIC_G2PSTATUS_TTOE
, "TIOE" },
383 { TX4927_PCIC_G2PSTATUS_RTOE
, "RTOE" },
384 }, pcicstat_tbl
[] = {
385 { TX4927_PCIC_PCICSTATUS_PME
, "PME" },
386 { TX4927_PCIC_PCICSTATUS_TLB
, "TLB" },
387 { TX4927_PCIC_PCICSTATUS_NIB
, "NIB" },
388 { TX4927_PCIC_PCICSTATUS_ZIB
, "ZIB" },
389 { TX4927_PCIC_PCICSTATUS_PERR
, "PERR" },
390 { TX4927_PCIC_PCICSTATUS_SERR
, "SERR" },
391 { TX4927_PCIC_PCICSTATUS_GBE
, "GBE" },
392 { TX4927_PCIC_PCICSTATUS_IWB
, "IWB" },
397 if (pcistatus
& TX4927_PCIC_PCISTATUS_ALL
) {
398 printk(KERN_CONT
"pcistat:%04x(", pcistatus
);
399 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(pcistat_tbl
); i
++)
400 if (pcistatus
& pcistat_tbl
[i
].flag
)
401 printk(KERN_CONT
"%s%s",
402 cont
++ ? " " : "", pcistat_tbl
[i
].str
);
403 printk(KERN_CONT
") ");
405 if (g2pstatus
& TX4927_PCIC_G2PSTATUS_ALL
) {
406 printk(KERN_CONT
"g2pstatus:%08x(", g2pstatus
);
407 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(g2pstat_tbl
); i
++)
408 if (g2pstatus
& g2pstat_tbl
[i
].flag
)
409 printk(KERN_CONT
"%s%s",
410 cont
++ ? " " : "", g2pstat_tbl
[i
].str
);
411 printk(KERN_CONT
") ");
413 if (pcicstatus
& TX4927_PCIC_PCICSTATUS_ALL
) {
414 printk(KERN_CONT
"pcicstatus:%08x(", pcicstatus
);
415 for (i
= 0, cont
= 0; i
< ARRAY_SIZE(pcicstat_tbl
); i
++)
416 if (pcicstatus
& pcicstat_tbl
[i
].flag
)
417 printk(KERN_CONT
"%s%s",
418 cont
++ ? " " : "", pcicstat_tbl
[i
].str
);
419 printk(KERN_CONT
")");
421 printk(KERN_CONT
"\n");
424 void tx4927_report_pcic_status(void)
428 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
429 if (pcicptrs
[i
].pcicptr
)
430 tx4927_report_pcic_status1(pcicptrs
[i
].pcicptr
);
434 static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem
*pcicptr
)
437 __u32 __iomem
*preg
= (__u32 __iomem
*)pcicptr
;
439 printk(KERN_INFO
"tx4927 pcic (0x%p) settings:", pcicptr
);
440 for (i
= 0; i
< sizeof(struct tx4927_pcic_reg
); i
+= 4, preg
++) {
442 printk(KERN_CONT
"\n");
443 printk(KERN_INFO
"%04x:", i
);
445 /* skip registers with side-effects */
446 if (i
== offsetof(struct tx4927_pcic_reg
, g2pintack
)
447 || i
== offsetof(struct tx4927_pcic_reg
, g2pspc
)
448 || i
== offsetof(struct tx4927_pcic_reg
, g2pcfgadrs
)
449 || i
== offsetof(struct tx4927_pcic_reg
, g2pcfgdata
)) {
450 printk(KERN_CONT
" XXXXXXXX");
453 printk(KERN_CONT
" %08x", __raw_readl(preg
));
455 printk(KERN_CONT
"\n");
458 void tx4927_dump_pcic_settings(void)
462 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
463 if (pcicptrs
[i
].pcicptr
)
464 tx4927_dump_pcic_settings1(pcicptrs
[i
].pcicptr
);
468 irqreturn_t
tx4927_pcierr_interrupt(int irq
, void *dev_id
)
470 struct pt_regs
*regs
= get_irq_regs();
471 struct tx4927_pcic_reg __iomem
*pcicptr
=
472 (struct tx4927_pcic_reg __iomem
*)(unsigned long)dev_id
;
474 if (txx9_pci_err_action
!= TXX9_PCI_ERR_IGNORE
) {
475 printk(KERN_WARNING
"PCIERR interrupt at 0x%0*lx\n",
476 (int)(2 * sizeof(unsigned long)), regs
->cp0_epc
);
477 tx4927_report_pcic_status1(pcicptr
);
479 if (txx9_pci_err_action
!= TXX9_PCI_ERR_PANIC
) {
480 /* clear all pci errors */
481 __raw_writel((__raw_readl(&pcicptr
->pcistatus
) & 0x0000ffff)
482 | (TX4927_PCIC_PCISTATUS_ALL
<< 16),
483 &pcicptr
->pcistatus
);
484 __raw_writel(TX4927_PCIC_G2PSTATUS_ALL
, &pcicptr
->g2pstatus
);
485 __raw_writel(TX4927_PCIC_PBASTATUS_ALL
, &pcicptr
->pbastatus
);
486 __raw_writel(TX4927_PCIC_PCICSTATUS_ALL
, &pcicptr
->pcicstatus
);
490 tx4927_dump_pcic_settings1(pcicptr
);
494 #ifdef CONFIG_TOSHIBA_FPCIB0
495 static void tx4927_quirk_slc90e66_bridge(struct pci_dev
*dev
)
497 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(dev
->bus
);
501 if (__raw_readl(&pcicptr
->pbacfg
) & TX4927_PCIC_PBACFG_PBAEN
) {
502 /* Reset Bus Arbiter */
503 __raw_writel(TX4927_PCIC_PBACFG_RPBA
, &pcicptr
->pbacfg
);
505 * swap reqBP and reqXP (raise priority of SLC90E66).
506 * SLC90E66(PCI-ISA bridge) is connected to REQ2 on
507 * PCI Backplane board.
509 __raw_writel(0x72543610, &pcicptr
->pbareqport
);
510 __raw_writel(0, &pcicptr
->pbabm
);
511 /* Use Fixed ParkMaster (required by SLC90E66) */
512 __raw_writel(TX4927_PCIC_PBACFG_FIXPA
, &pcicptr
->pbacfg
);
513 /* Enable Bus Arbiter */
514 __raw_writel(TX4927_PCIC_PBACFG_FIXPA
|
515 TX4927_PCIC_PBACFG_PBAEN
,
517 printk(KERN_INFO
"PCI: Use Fixed Park Master (REQPORT %08x)\n",
518 __raw_readl(&pcicptr
->pbareqport
));
521 #define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
522 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR
, PCI_DEVICE_ID_EFAR_SLC90E66_0
,
523 tx4927_quirk_slc90e66_bridge
);