Enable PCIE1 for MPC8641HPCN board

Signed-off-by: Jason Jin <Jason.jin@freescale.com>

3 files changed, 284 insertions, 110 deletions

diff --git a/cpu/mpc86xx/Makefile b/cpu/mpc86xx/Makefile
index ab6255a..7995945 100644
--- a/cpu/mpc86xx/Makefile
+++ b/cpu/mpc86xx/Makefile
@@ -28,9 +28,9 @@ include $(TOPDIR)/config.mk
 LIB	= lib$(CPU).a
 
 START	= start.o #resetvec.o
-ASOBJS  = cache.o 
+ASOBJS  = cache.o
 COBJS	= traps.o cpu.o cpu_init.o speed.o interrupts.o \
-	  pci.o i2c.o spd_sdram.o
+	  pci.o pcie_indirect.o i2c.o spd_sdram.o
 OBJS	= $(COBJS)
 
 all:	.depend $(START) $(ASOBJS) $(LIB)
diff --git a/cpu/mpc86xx/pci.c b/cpu/mpc86xx/pci.c
index 05976bd..deb66aa 100644
--- a/cpu/mpc86xx/pci.c
+++ b/cpu/mpc86xx/pci.c
@@ -1,6 +1,9 @@
 /*
- * Copyright 2005 Freescale Semiconductor.
+ * Copyright (C) Freescale Semiconductor,Inc.
+ * 2005, 2006. All rights reserved.
+ *
  * Ed Swarthout (ed.swarthout@freescale.com)
+ * Jason Jin (Jason.jin@freescale.com)
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -22,142 +25,115 @@
  */
 
 /*
- * PEX Configuration space access support for PEX Bridge
+ * PCIE Configuration space access support for PCIE Bridge
  */
 #include <common.h>
 #include <pci.h>
 
-
 #if defined(CONFIG_PCI)
-
 void
 pci_mpc86xx_init(struct pci_controller *hose)
 {
 	volatile immap_t    *immap = (immap_t *)CFG_CCSRBAR;
-	volatile ccsr_pex_t *pex1 = &immap->im_pex1;
+	volatile ccsr_pex_t *pcie1 = &immap->im_pex1;
+	u16 temp16;
+	u32 temp32;
+
 	volatile ccsr_gur_t *gur = &immap->im_gur;
 	uint host1_agent = (gur->porbmsr & MPC86xx_PORBMSR_HA) >> 17;
-	uint pex1_host =   (host1_agent == 2) || (host1_agent == 3);
-
-	u16 reg16, reg16_1, reg16_2, reg16_3;
-	u32 reg32, i;
-
-        ulong addr, data;
-
-        uint pex1_agent =  (host1_agent == 0) || (host1_agent == 1);
-        uint devdisr = gur->devdisr;
-        uint io_sel = (gur->pordevsr & MPC86xx_PORDEVSR_IO_SEL) >> 16;
-
-        if ((io_sel==2 || io_sel==3 || io_sel==5
-	     || io_sel==6 || io_sel==7 || io_sel==0xF )
-	    && !(devdisr & MPC86xx_DEVDISR_PCIEX1)){
-                printf ("PCI-EXPRESS 1: Configured as %s \n",
-                        pex1_agent ? "Agent" : "Host");
-                printf ("               Scanning PCI bus");
-                debug("0x%08x=0x%08x ", &pex1->pme_msg_det,pex1->pme_msg_det);
-                if (pex1->pme_msg_det) {
-                        pex1->pme_msg_det = 0xffffffff;
-                        debug (" with errors.  Clearing.  Now 0x%08x",
-			       pex1->pme_msg_det);
-                }
-                debug ("\n");
-        }
-
-	hose->first_busno = 0;
-	hose->last_busno = 0x7f;
-
-	pci_set_region(hose->regions + 0,
-		       CFG_PCI1_MEM_BASE,
-		       CFG_PCI1_MEM_PHYS,
-		       CFG_PCI1_MEM_SIZE,
-		       PCI_REGION_MEM);
-
-	pci_set_region(hose->regions + 1,
-		       CFG_PCI1_IO_BASE,
-		       CFG_PCI1_IO_PHYS,
-		       CFG_PCI1_IO_SIZE,
-		       PCI_REGION_IO);
+	uint pcie1_host = (host1_agent == 2) || (host1_agent == 3);
+	uint pcie1_agent = (host1_agent == 0) || (host1_agent == 1);
+	uint devdisr = gur->devdisr;
+	uint io_sel = (gur->pordevsr & MPC86xx_PORDEVSR_IO_SEL) >> 16;
+
+	if ((io_sel ==2 || io_sel == 3 || io_sel == 5 || io_sel == 6 ||
+	    io_sel == 7 || io_sel == 0xf) && !(devdisr & MPC86xx_DEVDISR_PCIEX1)){
+		printf ("PCI-EXPRESS 1: Configured as %s \n",
+			pcie1_agent ? "Agent" : "Host");
+		if(pcie1_agent) return; /*Don't scan bus when configured as agent*/
+		printf ("               Scanning PCIE bus");
+		debug("0x%08x=0x%08x ", &pcie1->pme_msg_det,pcie1->pme_msg_det);
+		if (pcie1->pme_msg_det) {
+			pcie1->pme_msg_det = 0xffffffff;
+			debug (" with errors.  Clearing.  Now 0x%08x",
+				pcie1->pme_msg_det);
+		}
+		debug ("\n");
+	}
+	else{
+		printf("PCI-EXPRESS 1 disabled!\n");
+		return;
+	}
 
-	hose->region_count = 2;
+	/*set first_bus=0 only skipped B0:D0:F0 which is
+	 * a reserved device in M1575, but make it easy for
+	 * most of the scan process.
+	 */
+	hose->first_busno = 0x00;
+	hose->last_busno = 0xfe;
 
-	pci_setup_indirect(hose,
+	pcie_setup_indirect(hose,
 			   (CFG_IMMR+0x8000),
 			   (CFG_IMMR+0x8004));
 
-	/*
-	 * Hose scan.
-	 */
-	pci_register_hose(hose);
+	pci_hose_read_config_word(hose, PCI_BDF(0,0,0), PCI_COMMAND, &temp16);
+	temp16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER |
+		  PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
+	pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_COMMAND, temp16);
 
-	pci_read_config_word (PCI_BDF(0,0,0), PCI_VENDOR_ID, &reg16);
-	debug("pex_mpc86xx_init: read %2x %4x\n",PCI_VENDOR_ID, reg16);
-	pci_read_config_word (PCI_BDF(0,0,0), PCI_DEVICE_ID, &reg16);
-	debug("pex_mpc86xx_init: read %2x %4x\n",PCI_DEVICE_ID, reg16);
+	pci_hose_write_config_word(hose,PCI_BDF(0,0,0), PCI_STATUS, 0xffff);
+	pci_hose_write_config_byte(hose, PCI_BDF(0,0,0), PCI_LATENCY_TIMER, 0x80);
 
-	pci_read_config_word (PCI_BDF(0,0,0), PCI_COMMAND, &reg16);
-	reg16 |= PCI_COMMAND_SERR |  PCI_COMMAND_PARITY \
-		| PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
-	pci_write_config_word(PCI_BDF(0,0,0), PCI_COMMAND, reg16);
+	pci_hose_read_config_dword(hose, PCI_BDF(0,0,0), PCI_PRIMARY_BUS, &temp32);
+	temp32 = (temp32 & 0xff000000) | (0xff) | (0x0 << 8) | (0xfe << 16);
+	pci_hose_write_config_dword(hose, PCI_BDF(0,0,0), PCI_PRIMARY_BUS, temp32);
 
-        pci_read_config_word (PCI_BDF(0,0,0), PCI_COMMAND, &reg16);
-	debug("pex_mpc86xx_init: read %2x %4x\n",PCI_COMMAND, reg16);
+	pcie1->powar1 = 0;
+	pcie1->powar2 = 0;
+	pcie1->piwar1 = 0;
+	pcie1->piwar1 = 0;
 
-	/*
-	 * Clear non-reserved bits in status register.
-	 */
-	/*
-	 * pci_write_config_word(PCI_BDF(0,0,0), PCI_STATUS, 0xffff);
-	 * pci_write_config_byte(PCI_BDF(0,0,0), PCI_LATENCY_TIMER,0x80);
-	 */
+	pcie1->powbar1  = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
+	pcie1->powar1   = 0x8004401c;	/* 512M MEM space */
+	pcie1->potar1   = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
+	pcie1->potear1  = 0x00000000;
 
-	pex1->powbar1  = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
-	pex1->powar1   = 0x8004401c;	/* 512M MEM space */
-	pex1->potar1   = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
-	pex1->potear1  = 0x00000000;
-
-        pex1->powbar2  = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff;
-	pex1->powar2   = 0x80088017;	/* 16M IO space */
-	pex1->potar2   = 0x00000000;
-	pex1->potear2  = 0x00000000;
-
-	if (!pex1->piwar1) {
-		pex1->pitar1 = 0x00000000;
-		pex1->piwbar1 = (0x80000000 >> 12 ) & 0x000fffff;
-		pex1->piwar1 = 0xa0f5501e;	/* Enable, Prefetch, Local Mem,
-						 * Snoop R/W, 2G */
-	}
+	pcie1->powbar2  = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff;
+	pcie1->powar2   = 0x80088017;	/* 16M IO space */
+	pcie1->potar2   = 0x00000000;
+	pcie1->potear2  = 0x00000000;
 
-	pex1->pitar2 = 0x00000000;
-        pex1->piwbar2 = (0xe2000000 >> 12 ) & 0x000fffff;
-        pex1->piwar2 = 0xa0f5501e;	/* Enable, Prefetch, Local Mem,
-						 * Snoop R/W, 2G */
+	pcie1->pitar1 = 0x00000000;
+	pcie1->piwbar1 = 0x00000000;
+	/* Enable, Prefetch, Local Mem, * Snoop R/W, 2G */
+	pcie1->piwar1 = 0xa0f5501e;
 
-	*(u32 *)(0xf8008000)= 0x80000000;
-	debug("Received data for addr 0x%08lx is 0x%08lx\n",
-	      *(u32*)(0xf8008000), *(u32*)(0xf8008004));
+	pci_set_region(hose->regions + 0,
+		       CFG_PCI_MEMORY_BUS,
+		       CFG_PCI_MEMORY_PHYS,
+		       CFG_PCI_MEMORY_SIZE,
+		       PCI_REGION_MEM | PCI_REGION_MEMORY);
 
-	pci_write_config_byte(PCI_BDF(0,0,0), PCI_PRIMARY_BUS,0x20);
-	pci_write_config_byte(PCI_BDF(0,0,0), PCI_SECONDARY_BUS,0x00);
-	pci_write_config_byte(PCI_BDF(0,0,0), PCI_SUBORDINATE_BUS,0x1F);
+	pci_set_region(hose->regions + 1,
+		       CFG_PCI1_MEM_BASE,
+		       CFG_PCI1_MEM_PHYS,
+		       CFG_PCI1_MEM_SIZE,
+		       PCI_REGION_MEM);
 
-	*(u32 *)(0xf8008000)= 0x80200000;
-	debug("Received data for addr 0x%08lx is 0x%08lx\n",
-	      *(u32*)(0xf8008000), *(u32*)(0xf8008004));
+	pci_set_region(hose->regions + 2,
+		       CFG_PCI1_IO_BASE,
+		       CFG_PCI1_IO_PHYS,
+		       CFG_PCI1_IO_SIZE,
+		       PCI_REGION_IO);
 
-	*(u32 *)(0xf8008000)= 0x80200000;
-	debug("Received data for addr 0x%08lx is 0x%08lx\n",
-	      *(u32*)(0xf8008000), *(u32*)(0xf8008004));
+	hose->region_count = 3;
 
-	*(u32 *)(0xf8008000)= 0x80200000;
-	debug("Received data for addr 0x%08lx is 0x%08lx\n",
-	      *(u32*)(0xf8008000), *(u32*)(0xf8008004));
+	pci_register_hose(hose);
 
 	hose->last_busno = pci_hose_scan(hose);
-	hose->last_busno = 0x21;
-	debug("pex_mpc86xx_init: last_busno %x\n",hose->last_busno);
-	debug("pex_mpc86xx init: current_busno %x\n ",hose->current_busno);
+	debug("pcie_mpc86xx_init: last_busno %x\n",hose->last_busno);
+	debug("pcie_mpc86xx init: current_busno %x\n ",hose->current_busno);
 
-	printf("....PCI scan & enumeration done\n");
+	printf("....PCIE1 scan & enumeration done\n");
 }
-
 #endif /* CONFIG_PCI */
diff --git a/cpu/mpc86xx/pcie_indirect.c b/cpu/mpc86xx/pcie_indirect.c
new file mode 100644
index 0000000..e3cb4be
--- /dev/null
+++ b/cpu/mpc86xx/pcie_indirect.c
@@ -0,0 +1,198 @@
+/*
+ * Support for indirect PCI bridges.
+ *
+ * Copyright (c) Freescale Semiconductor, Inc.
+ * 2006. All rights reserved.
+ *
+ * Jason Jin <Jason.jin@freescale.com>
+ *
+ * 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 Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * partly derived from
+ * arch/powerpc/platforms/86xx/mpc86xx_pcie.c
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_PCI
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <pci.h>
+
+#define PCI_CFG_OUT 	out_be32
+#define PEX_FIX		out_be32(hose->cfg_addr+0x4, 0x0400ffff)
+
+static int
+indirect_read_config_pcie(struct pci_controller *hose,
+		 	 pci_dev_t dev, int offset,
+			 int len,u32 *val)
+{
+	int bus = PCI_BUS(dev);
+	char devfn = ( (PCI_DEV(dev) << 4 ) | (PCI_FUNC(dev)) ) ;
+
+	unsigned char *cfg_data;
+	u32 temp;
+
+	PEX_FIX;
+	if( bus == 0xff) {
+		PCI_CFG_OUT(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000001);
+	}else {
+		PCI_CFG_OUT(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);
+	}
+	/*
+	 * Note: the caller has already checked that offset is
+	 * suitably aligned and that len is 1, 2 or 4.
+	 */
+	/* ERRATA PCI-Ex 12 - Configuration Address/Data Alignment */
+	cfg_data = hose->cfg_data;
+	PEX_FIX;
+	temp = in_le32(cfg_data);
+	switch (len) {
+	case 1:
+		*val = (temp >> (((offset & 3))*8)) & 0xff;
+		break;
+	case 2:
+		*val = (temp >> (((offset & 3))*8)) & 0xffff;
+		break;
+	default:
+		*val = temp;
+		break;
+	}
+
+	return 0;
+}
+
+static int
+indirect_write_config_pcie(struct pci_controller *hose,
+			  pci_dev_t dev,
+			  int offset,
+			  int len,
+			  u32 val)
+{
+	int bus = PCI_BUS(dev);
+	char devfn = ( (PCI_DEV(dev) << 4 ) | (PCI_FUNC(dev)) ) ;
+
+	unsigned char *cfg_data;
+	u32 temp;
+
+	PEX_FIX;
+	if( bus == 0xff) {
+		PCI_CFG_OUT(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000001);
+	}else {
+		PCI_CFG_OUT(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);
+	}
+
+	/*
+	 * Note: the caller has already checked that offset is
+	 * suitably aligned and that len is 1, 2 or 4.
+	 */
+	/* ERRATA PCI-Ex 12 - Configuration Address/Data Alignment */
+	cfg_data = hose->cfg_data;
+	switch (len) {
+	case 1:
+		PEX_FIX;
+		temp = in_le32(cfg_data);
+		temp = (temp & ~(0xff << ((offset & 3) * 8))) |
+			(val << ((offset & 3) * 8));
+		PEX_FIX;
+		out_le32(cfg_data, temp);
+		break;
+	case 2:
+		PEX_FIX;
+		temp = in_le32(cfg_data);
+		temp = (temp & ~(0xffff << ((offset & 3) * 8)));
+		temp |= (val << ((offset & 3) * 8)) ;
+		PEX_FIX;
+		out_le32(cfg_data, temp);
+		break;
+	default:
+		PEX_FIX;
+		out_le32(cfg_data, val);
+		break;
+	}
+	PEX_FIX;
+	return 0;
+}
+
+static int
+indirect_read_config_byte_pcie(struct pci_controller *hose,
+			      pci_dev_t dev,
+			      int offset,
+			      u8 *val)
+{
+	u32 val32;
+	indirect_read_config_pcie(hose,dev,offset,1,&val32);
+	*val = (u8)val32;
+	return 0;
+}
+
+static int
+indirect_read_config_word_pcie(struct pci_controller *hose,
+			      pci_dev_t dev,
+			      int offset,
+			      u16 *val)
+{
+	u32 val32;
+	indirect_read_config_pcie(hose,dev,offset,2,&val32);
+	*val = (u16)val32;
+	return 0;
+}
+
+static int
+indirect_read_config_dword_pcie(struct pci_controller *hose,
+			       pci_dev_t dev,
+			       int offset,
+			       u32 *val)
+{
+	return indirect_read_config_pcie(hose,dev, offset,4,val);
+}
+
+static int
+indirect_write_config_byte_pcie(struct pci_controller *hose,
+			       pci_dev_t dev,
+			       int offset,
+			       char val)
+{
+	return indirect_write_config_pcie(hose,dev, offset,1,(u32)val);
+}
+
+static int
+indirect_write_config_word_pcie(struct pci_controller *hose,
+			       pci_dev_t dev,
+			       int offset,
+			       unsigned short val)
+{
+	return indirect_write_config_pcie(hose,dev, offset,2,(u32)val);
+}
+
+static int
+indirect_write_config_dword_pcie(struct pci_controller *hose,
+			        pci_dev_t dev,
+			        int offset,
+			        unsigned short val)
+{
+	return indirect_write_config_pcie(hose,dev, offset,4,val);
+}
+
+void
+pcie_setup_indirect(struct pci_controller* hose,
+		   u32 cfg_addr,
+		   u32 cfg_data)
+{
+	pci_set_ops(hose,
+		    indirect_read_config_byte_pcie,
+		    indirect_read_config_word_pcie,
+		    indirect_read_config_dword_pcie,
+		    indirect_write_config_byte_pcie,
+		    indirect_write_config_word_pcie,
+		    indirect_write_config_dword_pcie);
+
+	hose->cfg_addr = (unsigned int *) cfg_addr;
+	hose->cfg_data = (unsigned char *) cfg_data;
+}
+
+#endif	/* CONFIG_PCI */