fsl_pci: Add support for FSL PCIe controllers v2.x

FSL PCIe controller v2.1:
	- New MSI inbound window
	- Same Inbound windows address as PCIe controller v1.x

Added new pit_t member(pmit) to struct ccsr_pci for MSI inbound window

FSL PCIe controller v2.2 and v2.3:
	- Different addresses for PCIe inbound window 3,2,1
	- Exposed PCIe inbound window 0
	- New PCIe interrupt status register

Added new Interrupt Status register to struct ccsr_pci & updated pit_t array
size to reflect the 4 inbound windows.

To maintain backward compatiblilty, on V2.2 or greater controllers we
start with inbound window 1 and leave inbound 0 with its default value
(which maps to CCSRBAR).

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/include/asm/fsl_pci.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007,2009-2010 Freescale Semiconductor, Inc.
+ * Copyright 2007,2009-2011 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -25,6 +25,9 @@
 #include <asm/fsl_serdes.h>
 #include <pci.h>
 
+#define PEX_IP_BLK_REV_2_2	0x02080202
+#define PEX_IP_BLK_REV_2_3	0x02080203
+
 int fsl_setup_hose(struct pci_controller *hose, unsigned long addr);
 int fsl_is_pci_agent(struct pci_controller *hose);
 void fsl_pci_config_unlock(struct pci_controller *hose);
@@ -73,7 +76,8 @@ typedef struct ccsr_pci {
 	u32	out_comp_to;	/* 0x00C - PCI Outbound Completion Timeout Register */
 	u32	out_conf_to;	/* 0x010 - PCI Configuration Timeout Register */
 	u32	config;		/* 0x014 - PCIE CONFIG Register */
-	char	res2[8];
+	u32	int_status;	/* 0x018 - PCIE interrupt status register */
+	char	res2[4];
 	u32	pme_msg_det;	/* 0x020 - PCIE PME & message detect register */
 	u32	pme_msg_dis;	/* 0x024 - PCIE PME & message disable register */
 	u32	pme_msg_int_en;	/* 0x028 - PCIE PME & message interrupt enable register */
@@ -83,8 +87,11 @@ typedef struct ccsr_pci {
 	u32	block_rev2;	/* 0xbfc - PCIE Block Revision register 2 */
 
 	pot_t	pot[5];		/* 0xc00 - 0xc9f Outbound ATMU's 0, 1, 2, 3, and 4 */
-	u32	res5[64];
-	pit_t	pit[3];		/* 0xda0 - 0xdff Inbound ATMU's 3, 2, and 1 */
+	u32	res5[24];
+	pit_t	pmit;		/* 0xd00 - 0xd9c Inbound ATMU's MSI */
+	u32	res6[24];
+	pit_t	pit[4];		/* 0xd80 - 0xdff Inbound ATMU's 3, 2, 1 and 0 */
+
 #define PIT3 0
 #define PIT2 1
 #define PIT1 2
@@ -158,6 +165,11 @@ typedef struct ccsr_pci {
 	u32	pdb_stat;	/* 0xf00 - PCIE Debug Status */
 	char	res24[252];
 } ccsr_fsl_pci_t;
+#define PCIE_CONFIG_PC	0x00020000
+#define PCIE_CONFIG_OB_CK	0x00002000
+#define PCIE_CONFIG_SAC	0x00000010
+#define PCIE_CONFIG_SP	0x80000002
+#define PCIE_CONFIG_SCC	0x80000001
 
 struct fsl_pci_info {
 	unsigned long regs;

drivers/pci/fsl_pci_init.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2010 Freescale Semiconductor, Inc.
+ * Copyright 2007-2011 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
@@ -223,6 +223,7 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
 	u32 cfg_data = (u32)&((ccsr_fsl_pci_t *)pci_info->regs)->cfg_data;
 	u16 temp16;
 	u32 temp32;
+	u32 block_rev;
 	int enabled, r, inbound = 0;
 	u16 ltssm;
 	u8 temp8, pcie_cap;
@@ -232,13 +233,20 @@ void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
 
 	/* Initialize ATMU registers based on hose regions and flags */
 	volatile pot_t *po = &pci->pot[1];	/* skip 0 */
-	volatile pit_t *pi = &pci->pit[2];	/* ranges from: 3 to 1 */
+	volatile pit_t *pi;
 
 	u64 out_hi = 0, out_lo = -1ULL;
 	u32 pcicsrbar, pcicsrbar_sz;
 
 	pci_setup_indirect(hose, cfg_addr, cfg_data);
 
+	block_rev = in_be32(&pci->block_rev1);
+	if (PEX_IP_BLK_REV_2_2 <= block_rev) {
+		pi = &pci->pit[2];	/* 0xDC0 */
+	} else {
+		pi = &pci->pit[3];	/* 0xDE0 */
+	}
+
 	/* Handle setup of outbound windows first */
 	for (r = 0; r < hose->region_count; r++) {
 		unsigned long flags = hose->regions[r].flags;