[POWERPC] 4xx: PLB to PCI Express support

This adds to the previous 2 patches the support for the 4xx PCI Express
cells as found in the 440SPe revA, revB and 405EX.

Unfortunately, due to significant differences between these, and other
interesting "features" of those pieces of HW, the code isn't as simple
as it is for PCI and PCI-X and some of the functions differ significantly
between the 3 implementations. Thus, not only this code can only support
those 3 implementations for now and will refuse to operate on any other,
but there are added ifdef's to avoid the bloat of building a fairly large
amount of code on platforms that don't need it.

Also, this code currently only supports fully initializing root complex
nodes, not endpoint. Some more code will have to be lifted from the
arch/ppc implementation to add the endpoint support, though it's mostly
differences in memory mapping, and the question on how to represent
endpoint mode PCI in the device-tree is thus open.

Many thanks to Stefan Roese for testing & fixing up the 405EX bits !
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

arch/powerpc/Kconfig

@@ -166,6 +166,7 @@ config PPC_OF_PLATFORM_PCI
 
 source "init/Kconfig"
 
+source "arch/powerpc/sysdev/Kconfig"
 source "arch/powerpc/platforms/Kconfig"
 
 menu "Kernel options"

arch/powerpc/sysdev/Kconfig

+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.txt.
+#
+
+config PPC4xx_PCI_EXPRESS
+	bool
+	depends on PCI && 4xx
+	default n

arch/powerpc/sysdev/ppc4xx_pci.h

@@ -121,5 +121,247 @@
 #define PCIL0_PTM2MS		0x38
 #define PCIL0_PTM2LA		0x3c
 
+/*
+ * 4xx PCIe bridge register definitions
+ */
+
+/* DCR offsets */
+#define DCRO_PEGPL_CFGBAH		0x00
+#define DCRO_PEGPL_CFGBAL		0x01
+#define DCRO_PEGPL_CFGMSK		0x02
+#define DCRO_PEGPL_MSGBAH		0x03
+#define DCRO_PEGPL_MSGBAL		0x04
+#define DCRO_PEGPL_MSGMSK		0x05
+#define DCRO_PEGPL_OMR1BAH		0x06
+#define DCRO_PEGPL_OMR1BAL		0x07
+#define DCRO_PEGPL_OMR1MSKH		0x08
+#define DCRO_PEGPL_OMR1MSKL		0x09
+#define DCRO_PEGPL_OMR2BAH		0x0a
+#define DCRO_PEGPL_OMR2BAL		0x0b
+#define DCRO_PEGPL_OMR2MSKH		0x0c
+#define DCRO_PEGPL_OMR2MSKL		0x0d
+#define DCRO_PEGPL_OMR3BAH		0x0e
+#define DCRO_PEGPL_OMR3BAL		0x0f
+#define DCRO_PEGPL_OMR3MSKH		0x10
+#define DCRO_PEGPL_OMR3MSKL		0x11
+#define DCRO_PEGPL_REGBAH		0x12
+#define DCRO_PEGPL_REGBAL		0x13
+#define DCRO_PEGPL_REGMSK		0x14
+#define DCRO_PEGPL_SPECIAL		0x15
+#define DCRO_PEGPL_CFG			0x16
+#define DCRO_PEGPL_ESR			0x17
+#define DCRO_PEGPL_EARH			0x18
+#define DCRO_PEGPL_EARL			0x19
+#define DCRO_PEGPL_EATR			0x1a
+
+/* DMER mask */
+#define GPL_DMER_MASK_DISA	0x02000000
+
+/*
+ * System DCRs (SDRs)
+ */
+#define PESDR0_PLLLCT1			0x03a0
+#define PESDR0_PLLLCT2			0x03a1
+#define PESDR0_PLLLCT3			0x03a2
+
+/*
+ * 440SPe additional DCRs
+ */
+#define PESDR0_440SPE_UTLSET1		0x0300
+#define PESDR0_440SPE_UTLSET2		0x0301
+#define PESDR0_440SPE_DLPSET		0x0302
+#define PESDR0_440SPE_LOOP		0x0303
+#define PESDR0_440SPE_RCSSET		0x0304
+#define PESDR0_440SPE_RCSSTS		0x0305
+#define PESDR0_440SPE_HSSL0SET1		0x0306
+#define PESDR0_440SPE_HSSL0SET2		0x0307
+#define PESDR0_440SPE_HSSL0STS		0x0308
+#define PESDR0_440SPE_HSSL1SET1		0x0309
+#define PESDR0_440SPE_HSSL1SET2		0x030a
+#define PESDR0_440SPE_HSSL1STS		0x030b
+#define PESDR0_440SPE_HSSL2SET1		0x030c
+#define PESDR0_440SPE_HSSL2SET2		0x030d
+#define PESDR0_440SPE_HSSL2STS		0x030e
+#define PESDR0_440SPE_HSSL3SET1		0x030f
+#define PESDR0_440SPE_HSSL3SET2		0x0310
+#define PESDR0_440SPE_HSSL3STS		0x0311
+#define PESDR0_440SPE_HSSL4SET1		0x0312
+#define PESDR0_440SPE_HSSL4SET2		0x0313
+#define PESDR0_440SPE_HSSL4STS	       	0x0314
+#define PESDR0_440SPE_HSSL5SET1		0x0315
+#define PESDR0_440SPE_HSSL5SET2		0x0316
+#define PESDR0_440SPE_HSSL5STS		0x0317
+#define PESDR0_440SPE_HSSL6SET1		0x0318
+#define PESDR0_440SPE_HSSL6SET2		0x0319
+#define PESDR0_440SPE_HSSL6STS		0x031a
+#define PESDR0_440SPE_HSSL7SET1		0x031b
+#define PESDR0_440SPE_HSSL7SET2		0x031c
+#define PESDR0_440SPE_HSSL7STS		0x031d
+#define PESDR0_440SPE_HSSCTLSET		0x031e
+#define PESDR0_440SPE_LANE_ABCD		0x031f
+#define PESDR0_440SPE_LANE_EFGH		0x0320
+
+#define PESDR1_440SPE_UTLSET1		0x0340
+#define PESDR1_440SPE_UTLSET2		0x0341
+#define PESDR1_440SPE_DLPSET		0x0342
+#define PESDR1_440SPE_LOOP		0x0343
+#define PESDR1_440SPE_RCSSET		0x0344
+#define PESDR1_440SPE_RCSSTS		0x0345
+#define PESDR1_440SPE_HSSL0SET1		0x0346
+#define PESDR1_440SPE_HSSL0SET2		0x0347
+#define PESDR1_440SPE_HSSL0STS		0x0348
+#define PESDR1_440SPE_HSSL1SET1		0x0349
+#define PESDR1_440SPE_HSSL1SET2		0x034a
+#define PESDR1_440SPE_HSSL1STS		0x034b
+#define PESDR1_440SPE_HSSL2SET1		0x034c
+#define PESDR1_440SPE_HSSL2SET2		0x034d
+#define PESDR1_440SPE_HSSL2STS		0x034e
+#define PESDR1_440SPE_HSSL3SET1		0x034f
+#define PESDR1_440SPE_HSSL3SET2		0x0350
+#define PESDR1_440SPE_HSSL3STS		0x0351
+#define PESDR1_440SPE_HSSCTLSET		0x0352
+#define PESDR1_440SPE_LANE_ABCD		0x0353
+
+#define PESDR2_440SPE_UTLSET1		0x0370
+#define PESDR2_440SPE_UTLSET2		0x0371
+#define PESDR2_440SPE_DLPSET		0x0372
+#define PESDR2_440SPE_LOOP		0x0373
+#define PESDR2_440SPE_RCSSET		0x0374
+#define PESDR2_440SPE_RCSSTS		0x0375
+#define PESDR2_440SPE_HSSL0SET1		0x0376
+#define PESDR2_440SPE_HSSL0SET2		0x0377
+#define PESDR2_440SPE_HSSL0STS		0x0378
+#define PESDR2_440SPE_HSSL1SET1		0x0379
+#define PESDR2_440SPE_HSSL1SET2		0x037a
+#define PESDR2_440SPE_HSSL1STS		0x037b
+#define PESDR2_440SPE_HSSL2SET1		0x037c
+#define PESDR2_440SPE_HSSL2SET2		0x037d
+#define PESDR2_440SPE_HSSL2STS		0x037e
+#define PESDR2_440SPE_HSSL3SET1		0x037f
+#define PESDR2_440SPE_HSSL3SET2		0x0380
+#define PESDR2_440SPE_HSSL3STS		0x0381
+#define PESDR2_440SPE_HSSCTLSET		0x0382
+#define PESDR2_440SPE_LANE_ABCD		0x0383
+
+/*
+ * 405EX additional DCRs
+ */
+#define PESDR0_405EX_UTLSET1		0x0400
+#define PESDR0_405EX_UTLSET2		0x0401
+#define PESDR0_405EX_DLPSET		0x0402
+#define PESDR0_405EX_LOOP		0x0403
+#define PESDR0_405EX_RCSSET		0x0404
+#define PESDR0_405EX_RCSSTS		0x0405
+#define PESDR0_405EX_PHYSET1		0x0406
+#define PESDR0_405EX_PHYSET2		0x0407
+#define PESDR0_405EX_BIST		0x0408
+#define PESDR0_405EX_LPB		0x040B
+#define PESDR0_405EX_PHYSTA		0x040C
+
+#define PESDR1_405EX_UTLSET1		0x0440
+#define PESDR1_405EX_UTLSET2		0x0441
+#define PESDR1_405EX_DLPSET		0x0442
+#define PESDR1_405EX_LOOP		0x0443
+#define PESDR1_405EX_RCSSET		0x0444
+#define PESDR1_405EX_RCSSTS		0x0445
+#define PESDR1_405EX_PHYSET1		0x0446
+#define PESDR1_405EX_PHYSET2		0x0447
+#define PESDR1_405EX_BIST		0x0448
+#define PESDR1_405EX_LPB		0x044B
+#define PESDR1_405EX_PHYSTA		0x044C
+
+/*
+ * Of the above, some are common offsets from the base
+ */
+#define PESDRn_UTLSET1			0x00
+#define PESDRn_UTLSET2			0x01
+#define PESDRn_DLPSET			0x02
+#define PESDRn_LOOP			0x03
+#define PESDRn_RCSSET			0x04
+#define PESDRn_RCSSTS			0x05
+
+/* 440spe only */
+#define PESDRn_440SPE_HSSL0SET1		0x06
+#define PESDRn_440SPE_HSSL0SET2		0x07
+#define PESDRn_440SPE_HSSL0STS		0x08
+#define PESDRn_440SPE_HSSL1SET1		0x09
+#define PESDRn_440SPE_HSSL1SET2		0x0a
+#define PESDRn_440SPE_HSSL1STS		0x0b
+#define PESDRn_440SPE_HSSL2SET1		0x0c
+#define PESDRn_440SPE_HSSL2SET2		0x0d
+#define PESDRn_440SPE_HSSL2STS		0x0e
+#define PESDRn_440SPE_HSSL3SET1		0x0f
+#define PESDRn_440SPE_HSSL3SET2		0x10
+#define PESDRn_440SPE_HSSL3STS		0x11
+
+/* 440spe port 0 only */
+#define PESDRn_440SPE_HSSL4SET1		0x12
+#define PESDRn_440SPE_HSSL4SET2		0x13
+#define PESDRn_440SPE_HSSL4STS	       	0x14
+#define PESDRn_440SPE_HSSL5SET1		0x15
+#define PESDRn_440SPE_HSSL5SET2		0x16
+#define PESDRn_440SPE_HSSL5STS		0x17
+#define PESDRn_440SPE_HSSL6SET1		0x18
+#define PESDRn_440SPE_HSSL6SET2		0x19
+#define PESDRn_440SPE_HSSL6STS		0x1a
+#define PESDRn_440SPE_HSSL7SET1		0x1b
+#define PESDRn_440SPE_HSSL7SET2		0x1c
+#define PESDRn_440SPE_HSSL7STS		0x1d
+
+/* 405ex only */
+#define PESDRn_405EX_PHYSET1		0x06
+#define PESDRn_405EX_PHYSET2		0x07
+#define PESDRn_405EX_PHYSTA		0x0c
+
+/*
+ * UTL register offsets
+ */
+#define PEUTL_PBCTL		0x00
+#define PEUTL_PBBSZ		0x20
+#define PEUTL_OPDBSZ		0x68
+#define PEUTL_IPHBSZ		0x70
+#define PEUTL_IPDBSZ		0x78
+#define PEUTL_OUTTR		0x90
+#define PEUTL_INTR		0x98
+#define PEUTL_PCTL		0xa0
+#define PEUTL_RCSTA		0xB0
+#define PEUTL_RCIRQEN		0xb8
+
+/*
+ * Config space register offsets
+ */
+#define PECFG_BAR0LMPA		0x210
+#define PECFG_BAR0HMPA		0x214
+#define PECFG_BAR1MPA		0x218
+#define PECFG_BAR2LMPA		0x220
+#define PECFG_BAR2HMPA		0x224
+
+#define PECFG_PIMEN		0x33c
+#define PECFG_PIM0LAL		0x340
+#define PECFG_PIM0LAH		0x344
+#define PECFG_PIM1LAL		0x348
+#define PECFG_PIM1LAH		0x34c
+#define PECFG_PIM01SAL		0x350
+#define PECFG_PIM01SAH		0x354
+
+#define PECFG_POM0LAL		0x380
+#define PECFG_POM0LAH		0x384
+#define PECFG_POM1LAL		0x388
+#define PECFG_POM1LAH		0x38c
+#define PECFG_POM2LAL		0x390
+#define PECFG_POM2LAH		0x394
+
+
+enum
+{
+	PTYPE_ENDPOINT		= 0x0,
+	PTYPE_LEGACY_ENDPOINT	= 0x1,
+	PTYPE_ROOT_PORT		= 0x4,
+
+	LNKW_X1			= 0x1,
+	LNKW_X4			= 0x4,
+	LNKW_X8			= 0x8
+};
+
 
 #endif /* __PPC4XX_PCI_H__ */