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 <linux/irq.h>
21 #include <asm/txx9/pci.h>
22 #include <asm/txx9/tx4927pcic.h>
25 struct pci_controller
*channel
;
26 struct tx4927_pcic_reg __iomem
*pcicptr
;
27 } pcicptrs
[2]; /* TX4938 has 2 pcic */
29 static void __init
set_tx4927_pcicptr(struct pci_controller
*channel
,
30 struct tx4927_pcic_reg __iomem
*pcicptr
)
34 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
35 if (pcicptrs
[i
].channel
== channel
) {
36 pcicptrs
[i
].pcicptr
= pcicptr
;
40 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
41 if (!pcicptrs
[i
].channel
) {
42 pcicptrs
[i
].channel
= channel
;
43 pcicptrs
[i
].pcicptr
= pcicptr
;
50 struct tx4927_pcic_reg __iomem
*get_tx4927_pcicptr(
51 struct pci_controller
*channel
)
55 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
56 if (pcicptrs
[i
].channel
== channel
)
57 return pcicptrs
[i
].pcicptr
;
62 static int mkaddr(struct pci_bus
*bus
, unsigned int devfn
, int where
,
63 struct tx4927_pcic_reg __iomem
*pcicptr
)
65 if (bus
->parent
== NULL
&&
66 devfn
>= PCI_DEVFN(TX4927_PCIC_MAX_DEVNU
, 0))
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),
79 static int check_abort(struct tx4927_pcic_reg __iomem
*pcicptr
)
81 int code
= PCIBIOS_SUCCESSFUL
;
83 /* wait write cycle completion before checking error status */
84 while (__raw_readl(&pcicptr
->pcicstatus
) & TX4927_PCIC_PCICSTATUS_IWB
)
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),
91 /* flush write buffer */
93 code
= PCIBIOS_DEVICE_NOT_FOUND
;
98 static u8
icd_readb(int offset
, struct tx4927_pcic_reg __iomem
*pcicptr
)
103 return __raw_readb((void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
105 static u16
icd_readw(int offset
, struct tx4927_pcic_reg __iomem
*pcicptr
)
110 return __raw_readw((void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
112 static u32
icd_readl(struct tx4927_pcic_reg __iomem
*pcicptr
)
114 return __raw_readl(&pcicptr
->g2pcfgdata
);
116 static void icd_writeb(u8 val
, int offset
,
117 struct tx4927_pcic_reg __iomem
*pcicptr
)
122 __raw_writeb(val
, (void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
124 static void icd_writew(u16 val
, int offset
,
125 struct tx4927_pcic_reg __iomem
*pcicptr
)
130 __raw_writew(val
, (void __iomem
*)&pcicptr
->g2pcfgdata
+ offset
);
132 static void icd_writel(u32 val
, struct tx4927_pcic_reg __iomem
*pcicptr
)
134 __raw_writel(val
, &pcicptr
->g2pcfgdata
);
137 static struct tx4927_pcic_reg __iomem
*pci_bus_to_pcicptr(struct pci_bus
*bus
)
139 struct pci_controller
*channel
= bus
->sysdata
;
140 return get_tx4927_pcicptr(channel
);
143 static int tx4927_pci_config_read(struct pci_bus
*bus
, unsigned int devfn
,
144 int where
, int size
, u32
*val
)
146 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(bus
);
148 if (mkaddr(bus
, devfn
, where
, pcicptr
)) {
154 *val
= icd_readb(where
& 3, pcicptr
);
157 *val
= icd_readw(where
& 3, pcicptr
);
160 *val
= icd_readl(pcicptr
);
162 return check_abort(pcicptr
);
165 static int tx4927_pci_config_write(struct pci_bus
*bus
, unsigned int devfn
,
166 int where
, int size
, u32 val
)
168 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(bus
);
170 if (mkaddr(bus
, devfn
, where
, pcicptr
))
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
)
204 if (!strncmp(str
, "trdyto=", 7)) {
205 if (strict_strtoul(str
+ 7, 0, &val
) == 0)
206 tx4927_pci_opts
.trdyto
= val
;
209 if (!strncmp(str
, "retryto=", 8)) {
210 if (strict_strtoul(str
+ 8, 0, &val
) == 0)
211 tx4927_pci_opts
.retryto
= val
;
214 if (!strncmp(str
, "gbwc=", 5)) {
215 if (strict_strtoul(str
+ 5, 0, &val
) == 0)
216 tx4927_pci_opts
.gbwc
= val
;
222 void __init
tx4927_pcic_setup(struct tx4927_pcic_reg __iomem
*pcicptr
,
223 struct pci_controller
*channel
, int extarb
)
228 set_tx4927_pcicptr(channel
, pcicptr
);
230 if (!channel
->pci_ops
)
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
;
239 local_irq_save(flags
);
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
),
249 /* GB->PCI mappings */
250 __raw_writel((channel
->io_resource
->end
- channel
->io_resource
->start
)
252 &pcicptr
->g2piomask
);
253 ____raw_writeq((channel
->io_resource
->start
+
254 channel
->io_map_base
- IO_BASE
) |
256 TX4927_PCIC_G2PIOGBASE_ECHG
258 TX4927_PCIC_G2PIOGBASE_BSDIS
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
]);
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
|
274 TX4927_PCIC_G2PMnGBASE_ECHG
276 TX4927_PCIC_G2PMnGBASE_BSDIS
278 , &pcicptr
->g2pmgbase
[0]);
279 ____raw_writeq(channel
->mem_resource
->start
-
281 &pcicptr
->g2pmpbase
[0]);
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
|
291 TX4927_PCIC_P2GMnGBASE_TECHG
293 TX4927_PCIC_P2GMnGBASE_TBSDIS
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]);
304 /* Clear all (including IRBER) except for GBWC */
305 __raw_writel((tx4927_pci_opts
.gbwc
<< 16)
306 & TX4927_PCIC_PCICCFG_GBWC_MASK
,
308 /* Enable Initiator Memory Space */
309 if (channel
->mem_resource
->end
)
310 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
311 | TX4927_PCIC_PCICCFG_G2PMEN(0),
313 /* Enable Initiator I/O Space */
314 if (channel
->io_resource
->end
)
315 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
316 | TX4927_PCIC_PCICCFG_G2PIOEN
,
318 /* Enable Initiator Config */
319 __raw_writel(__raw_readl(&pcicptr
->pciccfg
)
320 | TX4927_PCIC_PCICCFG_ICAEN
| TX4927_PCIC_PCICCFG_TCAR
,
323 /* Do not use MEMMUL, MEMINF: YMFPCI card causes M_ABORT. */
324 __raw_writel(0, &pcicptr
->pcicfg1
);
326 __raw_writel((__raw_readl(&pcicptr
->g2ptocnt
) & ~0xffff)
327 | (tx4927_pci_opts
.trdyto
& 0xff)
328 | ((tx4927_pci_opts
.retryto
& 0xff) << 8),
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
);
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
);
354 __raw_writel(PCI_COMMAND_MASTER
| PCI_COMMAND_MEMORY
355 | PCI_COMMAND_PARITY
| PCI_COMMAND_SERR
,
356 &pcicptr
->pcistatus
);
357 local_irq_restore(flags
);
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);
369 static void tx4927_report_pcic_status1(struct tx4927_pcic_reg __iomem
*pcicptr
)
371 __u16 pcistatus
= (__u16
)(__raw_readl(&pcicptr
->pcistatus
) >> 16);
372 __u32 g2pstatus
= __raw_readl(&pcicptr
->g2pstatus
);
373 __u32 pcicstatus
= __raw_readl(&pcicptr
->pcicstatus
);
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" },
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" },
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
") ");
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
") ");
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
")");
424 printk(KERN_CONT
"\n");
427 void tx4927_report_pcic_status(void)
431 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
432 if (pcicptrs
[i
].pcicptr
)
433 tx4927_report_pcic_status1(pcicptrs
[i
].pcicptr
);
437 static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem
*pcicptr
)
440 __u32 __iomem
*preg
= (__u32 __iomem
*)pcicptr
;
442 printk(KERN_INFO
"tx4927 pcic (0x%p) settings:", pcicptr
);
443 for (i
= 0; i
< sizeof(struct tx4927_pcic_reg
); i
+= 4, preg
++) {
445 printk(KERN_CONT
"\n");
446 printk(KERN_INFO
"%04x:", i
);
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");
456 printk(KERN_CONT
" %08x", __raw_readl(preg
));
458 printk(KERN_CONT
"\n");
461 void tx4927_dump_pcic_settings(void)
465 for (i
= 0; i
< ARRAY_SIZE(pcicptrs
); i
++) {
466 if (pcicptrs
[i
].pcicptr
)
467 tx4927_dump_pcic_settings1(pcicptrs
[i
].pcicptr
);
471 irqreturn_t
tx4927_pcierr_interrupt(int irq
, void *dev_id
)
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
;
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
);
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
);
493 tx4927_dump_pcic_settings1(pcicptr
);
497 #ifdef CONFIG_TOSHIBA_FPCIB0
498 static void tx4927_quirk_slc90e66_bridge(struct pci_dev
*dev
)
500 struct tx4927_pcic_reg __iomem
*pcicptr
= pci_bus_to_pcicptr(dev
->bus
);
504 if (__raw_readl(&pcicptr
->pbacfg
) & TX4927_PCIC_PBACFG_PBAEN
) {
505 /* Reset Bus Arbiter */
506 __raw_writel(TX4927_PCIC_PBACFG_RPBA
, &pcicptr
->pbacfg
);
508 * swap reqBP and reqXP (raise priority of SLC90E66).
509 * SLC90E66(PCI-ISA bridge) is connected to REQ2 on
510 * PCI Backplane board.
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
,
520 printk(KERN_INFO
"PCI: Use Fixed Park Master (REQPORT %08x)\n",
521 __raw_readl(&pcicptr
->pbareqport
));
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
);