drivers/pci/fsl_pci_init.c - u-boot - Git at Google

 /*
  * Copyright 2007-2010 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
  * Software Foundation; either version 2 of the License, or (at your option)
  * any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 #include <common.h>

 DECLARE_GLOBAL_DATA_PTR;

 /*
  * PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's
  *
  * Initialize controller and call the common driver/pci pci_hose_scan to
  * scan for bridges and devices.
  *
  * Hose fields which need to be pre-initialized by board specific code:
  *   regions[]
  *   first_busno
  *
  * Fields updated:
  *   last_busno
  */

 #include <pci.h>
 #include <asm/io.h>
 #include <asm/fsl_pci.h>

 /* Freescale-specific PCI config registers */
 #define FSL_PCI_PBFR		0x44
 #define FSL_PCIE_CAP_ID		0x4c
 #define FSL_PCIE_CFG_RDY	0x4b0
 #define FSL_PROG_IF_AGENT	0x1

 void pciauto_prescan_setup_bridge(struct pci_controller *hose,
 				pci_dev_t dev, int sub_bus);
 void pciauto_postscan_setup_bridge(struct pci_controller *hose,
 				pci_dev_t dev, int sub_bus);
 void pciauto_config_init(struct pci_controller *hose);

 #ifndef CONFIG_SYS_PCI_MEMORY_BUS
 #define CONFIG_SYS_PCI_MEMORY_BUS 0
 #endif

 #ifndef CONFIG_SYS_PCI_MEMORY_PHYS
 #define CONFIG_SYS_PCI_MEMORY_PHYS 0
 #endif

 #if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS)
 #define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024)
 #endif

 /* Setup one inbound ATMU window.
  *
  * We let the caller decide what the window size should be
  */
 static void set_inbound_window(volatile pit_t *pi,
 				struct pci_region *r,
 				u64 size)
 {
 	u32 sz = (__ilog2_u64(size) - 1);
 	u32 flag = PIWAR_EN | PIWAR_LOCAL |
 			PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;

 	out_be32(&pi->pitar, r->phys_start >> 12);
 	out_be32(&pi->piwbar, r->bus_start >> 12);
 #ifdef CONFIG_SYS_PCI_64BIT
 	out_be32(&pi->piwbear, r->bus_start >> 44);
 #else
 	out_be32(&pi->piwbear, 0);
 #endif
 	if (r->flags & PCI_REGION_PREFETCH)
 		flag |= PIWAR_PF;
 	out_be32(&pi->piwar, flag | sz);
 }

 int fsl_setup_hose(struct pci_controller *hose, unsigned long addr)
 {
 	volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *) addr;

 	pci_setup_indirect(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);

 	return fsl_is_pci_agent(hose);
 }

 static int fsl_pci_setup_inbound_windows(struct pci_controller *hose,
 					 u64 out_lo, u8 pcie_cap,
 					 volatile pit_t *pi)
 {
 	struct pci_region *r = hose->regions + hose->region_count;
 	u64 sz = min((u64)gd->ram_size, (1ull << 32));

 	phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
 	pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
 	pci_size_t pci_sz;

 	/* we have no space available for inbound memory mapping */
 	if (bus_start > out_lo) {
 		printf ("no space for inbound mapping of memory\n");
 		return 0;
 	}

 	/* limit size */
 	if ((bus_start + sz) > out_lo) {
 		sz = out_lo - bus_start;
 		debug ("limiting size to %llx\n", sz);
 	}

 	pci_sz = 1ull << __ilog2_u64(sz);
 	/*
 	 * we can overlap inbound/outbound windows on PCI-E since RX & TX
 	 * links a separate
 	 */
 	if ((pcie_cap == PCI_CAP_ID_EXP) && (pci_sz < sz)) {
 		debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
 			(u64)bus_start, (u64)phys_start, (u64)sz);
 		pci_set_region(r, bus_start, phys_start, sz,
 				PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
 				PCI_REGION_PREFETCH);

 		/* if we aren't an exact power of two match, pci_sz is smaller
 		 * round it up to the next power of two.  We report the actual
 		 * size to pci region tracking.
 		 */
 		if (pci_sz != sz)
 			sz = 2ull << __ilog2_u64(sz);

 		set_inbound_window(pi--, r++, sz);
 		sz = 0; /* make sure we dont set the R2 window */
 	} else {
 		debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
 			(u64)bus_start, (u64)phys_start, (u64)pci_sz);
 		pci_set_region(r, bus_start, phys_start, pci_sz,
 				PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
 				PCI_REGION_PREFETCH);
 		set_inbound_window(pi--, r++, pci_sz);

 		sz -= pci_sz;
 		bus_start += pci_sz;
 		phys_start += pci_sz;

 		pci_sz = 1ull << __ilog2_u64(sz);
 		if (sz) {
 			debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n",
 				(u64)bus_start, (u64)phys_start, (u64)pci_sz);
 			pci_set_region(r, bus_start, phys_start, pci_sz,
 					PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
 					PCI_REGION_PREFETCH);
 			set_inbound_window(pi--, r++, pci_sz);
 			sz -= pci_sz;
 			bus_start += pci_sz;
 			phys_start += pci_sz;
 		}
 	}

 #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT)
 	/*
 	 * On 64-bit capable systems, set up a mapping for all of DRAM
 	 * in high pci address space.
 	 */
 	pci_sz = 1ull << __ilog2_u64(gd->ram_size);
 	/* round up to the next largest power of two */
 	if (gd->ram_size > pci_sz)
 		pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1);
 	debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n",
 		(u64)CONFIG_SYS_PCI64_MEMORY_BUS,
 		(u64)CONFIG_SYS_PCI_MEMORY_PHYS,
 		(u64)pci_sz);
 	pci_set_region(r,
 			CONFIG_SYS_PCI64_MEMORY_BUS,
 			CONFIG_SYS_PCI_MEMORY_PHYS,
 			pci_sz,
 			PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
 			PCI_REGION_PREFETCH);
 	set_inbound_window(pi--, r++, pci_sz);
 #else
 	pci_sz = 1ull << __ilog2_u64(sz);
 	if (sz) {
 		debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n",
 			(u64)bus_start, (u64)phys_start, (u64)pci_sz);
 		pci_set_region(r, bus_start, phys_start, pci_sz,
 				PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
 				PCI_REGION_PREFETCH);
 		sz -= pci_sz;
 		bus_start += pci_sz;
 		phys_start += pci_sz;
 		set_inbound_window(pi--, r++, pci_sz);
 	}
 #endif

 #ifdef CONFIG_PHYS_64BIT
 	if (sz && (((u64)gd->ram_size) < (1ull << 32)))
 		printf("Was not able to map all of memory via "
 			"inbound windows -- %lld remaining\n", sz);
 #endif

 	hose->region_count = r - hose->regions;

 	return 1;
 }

 void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data)
 {
 	u16 temp16;
 	u32 temp32;
 	int enabled, r, inbound = 0;
 	u16 ltssm;
 	u8 temp8, pcie_cap;
 	volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *)cfg_addr;
 	struct pci_region *reg = hose->regions + hose->region_count;
 	pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);

 	/* 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 */

 	u64 out_hi = 0, out_lo = -1ULL;
 	u32 pcicsrbar, pcicsrbar_sz;

 #ifdef DEBUG
 	int neg_link_w;
 #endif

 	pci_setup_indirect(hose, cfg_addr, cfg_data);

 	/* Handle setup of outbound windows first */
 	for (r = 0; r < hose->region_count; r++) {
 		unsigned long flags = hose->regions[r].flags;
 		u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1);

 		flags &= PCI_REGION_SYS_MEMORY|PCI_REGION_TYPE;
 		if (flags != PCI_REGION_SYS_MEMORY) {
 			u64 start = hose->regions[r].bus_start;
 			u64 end = start + hose->regions[r].size;

 			out_be32(&po->powbar, hose->regions[r].phys_start >> 12);
 			out_be32(&po->potar, start >> 12);
 #ifdef CONFIG_SYS_PCI_64BIT
 			out_be32(&po->potear, start >> 44);
 #else
 			out_be32(&po->potear, 0);
 #endif
 			if (hose->regions[r].flags & PCI_REGION_IO) {
 				out_be32(&po->powar, POWAR_EN | sz |
 					POWAR_IO_READ | POWAR_IO_WRITE);
 			} else {
 				out_be32(&po->powar, POWAR_EN | sz |
 					POWAR_MEM_READ | POWAR_MEM_WRITE);
 				out_lo = min(start, out_lo);
 				out_hi = max(end, out_hi);
 			}
 			po++;
 		}
 	}
 	debug("Outbound memory range: %llx:%llx\n", out_lo, out_hi);

 	/* setup PCSRBAR/PEXCSRBAR */
 	pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, 0xffffffff);
 	pci_hose_read_config_dword (hose, dev, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
 	pcicsrbar_sz = ~pcicsrbar_sz + 1;

 	if (out_hi < (0x100000000ull - pcicsrbar_sz) ||
 		(out_lo > 0x100000000ull))
 		pcicsrbar = 0x100000000ull - pcicsrbar_sz;
 	else
 		pcicsrbar = (out_lo - pcicsrbar_sz) & -pcicsrbar_sz;
 	pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, pcicsrbar);

 	out_lo = min(out_lo, (u64)pcicsrbar);

 	debug("PCICSRBAR @ 0x%x\n", pcicsrbar);

 	pci_set_region(reg++, pcicsrbar, CONFIG_SYS_CCSRBAR_PHYS,
 			pcicsrbar_sz, PCI_REGION_SYS_MEMORY);
 	hose->region_count++;

 	/* see if we are a PCIe or PCI controller */
 	pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);

 	/* inbound */
 	inbound = fsl_pci_setup_inbound_windows(hose, out_lo, pcie_cap, pi);

 	for (r = 0; r < hose->region_count; r++)
 		debug("PCI reg:%d %016llx:%016llx %016llx %08x\n", r,
 			(u64)hose->regions[r].phys_start,
 			hose->regions[r].bus_start,
 			hose->regions[r].size,
 			hose->regions[r].flags);

 	pci_register_hose(hose);
 	pciauto_config_init(hose);	/* grab pci_{mem,prefetch,io} */
 	hose->current_busno = hose->first_busno;

 	out_be32(&pci->pedr, 0xffffffff);	/* Clear any errors */
 	out_be32(&pci->peer, ~0x20140);	/* Enable All Error Interupts except
 					 * - Master abort (pci)
 					 * - Master PERR (pci)
 					 * - ICCA (PCIe)
 					 */
 	pci_hose_read_config_dword(hose, dev, PCI_DCR, &temp32);
 	temp32 |= 0xf000e;		/* set URR, FER, NFER (but not CER) */
 	pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32);

 	if (pcie_cap == PCI_CAP_ID_EXP) {
 		pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm);
 		enabled = ltssm >= PCI_LTSSM_L0;

 #ifdef CONFIG_FSL_PCIE_RESET
 		if (ltssm == 1) {
 			int i;
 			debug("....PCIe link error. " "LTSSM=0x%02x.", ltssm);
 			/* assert PCIe reset */
 			setbits_be32(&pci->pdb_stat, 0x08000000);
 			(void) in_be32(&pci->pdb_stat);
 			udelay(100);
 			debug("  Asserting PCIe reset @%x = %x\n",
 			      &pci->pdb_stat, in_be32(&pci->pdb_stat));
 			/* clear PCIe reset */
 			clrbits_be32(&pci->pdb_stat, 0x08000000);
 			asm("sync;isync");
 			for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) {
 				pci_hose_read_config_word(hose, dev, PCI_LTSSM,
 							&ltssm);
 				udelay(1000);
 				debug("....PCIe link error. "
 				      "LTSSM=0x%02x.\n", ltssm);
 			}
 			enabled = ltssm >= PCI_LTSSM_L0;

 			/* we need to re-write the bar0 since a reset will
 			 * clear it
 			 */
 			pci_hose_write_config_dword(hose, dev,
 					PCI_BASE_ADDRESS_0, pcicsrbar);
 		}
 #endif

 		if (!enabled) {
 			debug("....PCIE link error.  Skipping scan."
 			      "LTSSM=0x%02x\n", ltssm);
 			hose->last_busno = hose->first_busno;
 			return;
 		}

 		out_be32(&pci->pme_msg_det, 0xffffffff);
 		out_be32(&pci->pme_msg_int_en, 0xffffffff);
 #ifdef DEBUG
 		pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16);
 		neg_link_w = (temp16 & 0x3f0 ) >> 4;
 		printf("...PCIE LTSSM=0x%x, Negotiated link width=%d\n",
 		      ltssm, neg_link_w);
 #endif
 		hose->current_busno++; /* Start scan with secondary */
 		pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
 	}

 	/* Use generic setup_device to initialize standard pci regs,
 	 * but do not allocate any windows since any BAR found (such
 	 * as PCSRBAR) is not in this cpu's memory space.
 	 */
 	pciauto_setup_device(hose, dev, 0, hose->pci_mem,
 			     hose->pci_prefetch, hose->pci_io);

 	if (inbound) {
 		pci_hose_read_config_word(hose, dev, PCI_COMMAND, &temp16);
 		pci_hose_write_config_word(hose, dev, PCI_COMMAND,
 					   temp16 | PCI_COMMAND_MEMORY);
 	}

 #ifndef CONFIG_PCI_NOSCAN
 	pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &temp8);

 	/* Programming Interface (PCI_CLASS_PROG)
 	 * 0 == pci host or pcie root-complex,
 	 * 1 == pci agent or pcie end-point
 	 */
 	if (!temp8) {
 		printf("               Scanning PCI bus %02x\n",
 			hose->current_busno);
 		hose->last_busno = pci_hose_scan_bus(hose, hose->current_busno);
 	} else {
 		debug("               Not scanning PCI bus %02x. PI=%x\n",
 			hose->current_busno, temp8);
 		hose->last_busno = hose->current_busno;
 	}

 	/* if we are PCIe - update limit regs and subordinate busno
 	 * for the virtual P2P bridge
 	 */
 	if (pcie_cap == PCI_CAP_ID_EXP) {
 		pciauto_postscan_setup_bridge(hose, dev, hose->last_busno);
 	}
 #else
 	hose->last_busno = hose->current_busno;
 #endif

 	/* Clear all error indications */
 	if (pcie_cap == PCI_CAP_ID_EXP)
 		out_be32(&pci->pme_msg_det, 0xffffffff);
 	out_be32(&pci->pedr, 0xffffffff);

 	pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16);
 	if (temp16) {
 		pci_hose_write_config_word(hose, dev, PCI_DSR, 0xffff);
 	}

 	pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16);
 	if (temp16) {
 		pci_hose_write_config_word(hose, dev, PCI_SEC_STATUS, 0xffff);
 	}
 }

 int fsl_is_pci_agent(struct pci_controller *hose)
 {
 	u8 prog_if;
 	pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);

 	pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prog_if);

 	return (prog_if == FSL_PROG_IF_AGENT);
 }

 int fsl_pci_init_port(struct fsl_pci_info *pci_info,
 			struct pci_controller *hose, int busno)
 {
 	volatile ccsr_fsl_pci_t *pci;
 	struct pci_region *r;

 	pci = (ccsr_fsl_pci_t *) pci_info->regs;

 	/* on non-PCIe controllers we don't have pme_msg_det so this code
 	 * should do nothing since the read will return 0
 	 */
 	if (in_be32(&pci->pme_msg_det)) {
 		out_be32(&pci->pme_msg_det, 0xffffffff);
 		debug (" with errors.  Clearing.  Now 0x%08x",
 			pci->pme_msg_det);
 	}

 	r = hose->regions + hose->region_count;

 	/* outbound memory */
 	pci_set_region(r++,
 			pci_info->mem_bus,
 			pci_info->mem_phys,
 			pci_info->mem_size,
 			PCI_REGION_MEM);

 	/* outbound io */
 	pci_set_region(r++,
 			pci_info->io_bus,
 			pci_info->io_phys,
 			pci_info->io_size,
 			PCI_REGION_IO);

 	hose->region_count = r - hose->regions;
 	hose->first_busno = busno;

 	fsl_pci_init(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);

 	if (fsl_is_pci_agent(hose)) {
 		fsl_pci_config_unlock(hose);
 		hose->last_busno = hose->first_busno;
 	}

 	printf("    PCIE%x on bus %02x - %02x\n", pci_info->pci_num,
 			hose->first_busno, hose->last_busno);

 	return(hose->last_busno + 1);
 }

 /* Enable inbound PCI config cycles for agent/endpoint interface */
 void fsl_pci_config_unlock(struct pci_controller *hose)
 {
 	pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
 	u8 agent;
 	u8 pcie_cap;
 	u16 pbfr;

 	pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &agent);
 	if (!agent)
 		return;

 	pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
 	if (pcie_cap != 0x0) {
 		/* PCIe - set CFG_READY bit of Configuration Ready Register */
 		pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1);
 	} else {
 		/* PCI - clear ACL bit of PBFR */
 		pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr);
 		pbfr &= ~0x20;
 		pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr);
 	}
 }

 #ifdef CONFIG_OF_BOARD_SETUP
 #include <libfdt.h>
 #include <fdt_support.h>

 void ft_fsl_pci_setup(void *blob, const char *pci_compat,
 			struct pci_controller *hose, unsigned long ctrl_addr)
 {
 	int off;
 	u32 bus_range[2];
 	phys_addr_t p_ctrl_addr = (phys_addr_t)ctrl_addr;

 	/* convert ctrl_addr to true physical address */
 	p_ctrl_addr = (phys_addr_t)ctrl_addr - CONFIG_SYS_CCSRBAR;
 	p_ctrl_addr += CONFIG_SYS_CCSRBAR_PHYS;

 	off = fdt_node_offset_by_compat_reg(blob, pci_compat, p_ctrl_addr);

 	if (off < 0)
 		return;

 	/* We assume a cfg_addr not being set means we didn't setup the controller */
 	if ((hose == NULL) || (hose->cfg_addr == NULL)) {
 		fdt_del_node(blob, off);
 	} else {
 		bus_range[0] = 0;
 		bus_range[1] = hose->last_busno - hose->first_busno;
 		fdt_setprop(blob, off, "bus-range", &bus_range[0], 2*4);
 		fdt_pci_dma_ranges(blob, off, hose);
 	}
 }
 #endif
	/*
	* Copyright 2007-2010 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
	* Software Foundation; either version 2 of the License, or (at your option)
	* any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	#include <common.h>

	DECLARE_GLOBAL_DATA_PTR;

	/*
	* PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's
	*
	* Initialize controller and call the common driver/pci pci_hose_scan to
	* scan for bridges and devices.
	*
	* Hose fields which need to be pre-initialized by board specific code:
	* regions[]
	* first_busno
	*
	* Fields updated:
	* last_busno
	*/

	#include <pci.h>
	#include <asm/io.h>
	#include <asm/fsl_pci.h>

	/* Freescale-specific PCI config registers */
	#define FSL_PCI_PBFR 0x44
	#define FSL_PCIE_CAP_ID 0x4c
	#define FSL_PCIE_CFG_RDY 0x4b0
	#define FSL_PROG_IF_AGENT 0x1

	void pciauto_prescan_setup_bridge(struct pci_controller *hose,
	pci_dev_t dev, int sub_bus);
	void pciauto_postscan_setup_bridge(struct pci_controller *hose,
	pci_dev_t dev, int sub_bus);
	void pciauto_config_init(struct pci_controller *hose);

	#ifndef CONFIG_SYS_PCI_MEMORY_BUS
	#define CONFIG_SYS_PCI_MEMORY_BUS 0
	#endif

	#ifndef CONFIG_SYS_PCI_MEMORY_PHYS
	#define CONFIG_SYS_PCI_MEMORY_PHYS 0
	#endif

	#if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS)
	#define CONFIG_SYS_PCI64_MEMORY_BUS (64ull10241024*1024)
	#endif

	/* Setup one inbound ATMU window.
	*
	* We let the caller decide what the window size should be
	*/
	static void set_inbound_window(volatile pit_t *pi,
	struct pci_region *r,
	u64 size)
	{
	u32 sz = (__ilog2_u64(size) - 1);
	u32 flag = PIWAR_EN \| PIWAR_LOCAL \|
	PIWAR_READ_SNOOP \| PIWAR_WRITE_SNOOP;

	out_be32(&pi->pitar, r->phys_start >> 12);
	out_be32(&pi->piwbar, r->bus_start >> 12);
	#ifdef CONFIG_SYS_PCI_64BIT
	out_be32(&pi->piwbear, r->bus_start >> 44);
	#else
	out_be32(&pi->piwbear, 0);
	#endif
	if (r->flags & PCI_REGION_PREFETCH)
	flag \|= PIWAR_PF;
	out_be32(&pi->piwar, flag \| sz);
	}

	int fsl_setup_hose(struct pci_controller *hose, unsigned long addr)
	{
	volatile ccsr_fsl_pci_t pci = (ccsr_fsl_pci_t ) addr;

	pci_setup_indirect(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);

	return fsl_is_pci_agent(hose);
	}

	static int fsl_pci_setup_inbound_windows(struct pci_controller *hose,
	u64 out_lo, u8 pcie_cap,
	volatile pit_t *pi)
	{
	struct pci_region *r = hose->regions + hose->region_count;
	u64 sz = min((u64)gd->ram_size, (1ull << 32));

	phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
	pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
	pci_size_t pci_sz;

	/* we have no space available for inbound memory mapping */
	if (bus_start > out_lo) {
	printf ("no space for inbound mapping of memory\n");
	return 0;
	}

	/* limit size */
	if ((bus_start + sz) > out_lo) {
	sz = out_lo - bus_start;
	debug ("limiting size to %llx\n", sz);
	}

	pci_sz = 1ull << __ilog2_u64(sz);
	/*
	* we can overlap inbound/outbound windows on PCI-E since RX & TX
	* links a separate
	*/
	if ((pcie_cap == PCI_CAP_ID_EXP) && (pci_sz < sz)) {
	debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
	(u64)bus_start, (u64)phys_start, (u64)sz);
	pci_set_region(r, bus_start, phys_start, sz,
	PCI_REGION_MEM \| PCI_REGION_SYS_MEMORY \|
	PCI_REGION_PREFETCH);

	/* if we aren't an exact power of two match, pci_sz is smaller
	* round it up to the next power of two. We report the actual
	* size to pci region tracking.
	*/
	if (pci_sz != sz)
	sz = 2ull << __ilog2_u64(sz);

	set_inbound_window(pi--, r++, sz);
	sz = 0; /* make sure we dont set the R2 window */
	} else {
	debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
	(u64)bus_start, (u64)phys_start, (u64)pci_sz);
	pci_set_region(r, bus_start, phys_start, pci_sz,
	PCI_REGION_MEM \| PCI_REGION_SYS_MEMORY \|
	PCI_REGION_PREFETCH);
	set_inbound_window(pi--, r++, pci_sz);

	sz -= pci_sz;
	bus_start += pci_sz;
	phys_start += pci_sz;

	pci_sz = 1ull << __ilog2_u64(sz);
	if (sz) {
	debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n",
	(u64)bus_start, (u64)phys_start, (u64)pci_sz);
	pci_set_region(r, bus_start, phys_start, pci_sz,
	PCI_REGION_MEM \| PCI_REGION_SYS_MEMORY \|
	PCI_REGION_PREFETCH);
	set_inbound_window(pi--, r++, pci_sz);
	sz -= pci_sz;
	bus_start += pci_sz;
	phys_start += pci_sz;
	}
	}

	#if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT)
	/*
	* On 64-bit capable systems, set up a mapping for all of DRAM
	* in high pci address space.
	*/
	pci_sz = 1ull << __ilog2_u64(gd->ram_size);
	/* round up to the next largest power of two */
	if (gd->ram_size > pci_sz)
	pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1);
	debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n",
	(u64)CONFIG_SYS_PCI64_MEMORY_BUS,
	(u64)CONFIG_SYS_PCI_MEMORY_PHYS,
	(u64)pci_sz);
	pci_set_region(r,
	CONFIG_SYS_PCI64_MEMORY_BUS,
	CONFIG_SYS_PCI_MEMORY_PHYS,
	pci_sz,
	PCI_REGION_MEM \| PCI_REGION_SYS_MEMORY \|
	PCI_REGION_PREFETCH);
	set_inbound_window(pi--, r++, pci_sz);
	#else
	pci_sz = 1ull << __ilog2_u64(sz);
	if (sz) {
	debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n",
	(u64)bus_start, (u64)phys_start, (u64)pci_sz);
	pci_set_region(r, bus_start, phys_start, pci_sz,
	PCI_REGION_MEM \| PCI_REGION_SYS_MEMORY \|
	PCI_REGION_PREFETCH);
	sz -= pci_sz;
	bus_start += pci_sz;
	phys_start += pci_sz;
	set_inbound_window(pi--, r++, pci_sz);
	}
	#endif

	#ifdef CONFIG_PHYS_64BIT
	if (sz && (((u64)gd->ram_size) < (1ull << 32)))
	printf("Was not able to map all of memory via "
	"inbound windows -- %lld remaining\n", sz);
	#endif

	hose->region_count = r - hose->regions;

	return 1;
	}

	void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data)
	{
	u16 temp16;
	u32 temp32;
	int enabled, r, inbound = 0;
	u16 ltssm;
	u8 temp8, pcie_cap;
	volatile ccsr_fsl_pci_t pci = (ccsr_fsl_pci_t )cfg_addr;
	struct pci_region *reg = hose->regions + hose->region_count;
	pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);

	/* 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 */

	u64 out_hi = 0, out_lo = -1ULL;
	u32 pcicsrbar, pcicsrbar_sz;

	#ifdef DEBUG
	int neg_link_w;
	#endif

	pci_setup_indirect(hose, cfg_addr, cfg_data);

	/* Handle setup of outbound windows first */
	for (r = 0; r < hose->region_count; r++) {
	unsigned long flags = hose->regions[r].flags;
	u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1);

	flags &= PCI_REGION_SYS_MEMORY\|PCI_REGION_TYPE;
	if (flags != PCI_REGION_SYS_MEMORY) {
	u64 start = hose->regions[r].bus_start;
	u64 end = start + hose->regions[r].size;

	out_be32(&po->powbar, hose->regions[r].phys_start >> 12);
	out_be32(&po->potar, start >> 12);
	#ifdef CONFIG_SYS_PCI_64BIT
	out_be32(&po->potear, start >> 44);
	#else
	out_be32(&po->potear, 0);
	#endif
	if (hose->regions[r].flags & PCI_REGION_IO) {
	out_be32(&po->powar, POWAR_EN \| sz \|
	POWAR_IO_READ \| POWAR_IO_WRITE);
	} else {
	out_be32(&po->powar, POWAR_EN \| sz \|
	POWAR_MEM_READ \| POWAR_MEM_WRITE);
	out_lo = min(start, out_lo);
	out_hi = max(end, out_hi);
	}
	po++;
	}
	}
	debug("Outbound memory range: %llx:%llx\n", out_lo, out_hi);

	/* setup PCSRBAR/PEXCSRBAR */
	pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, 0xffffffff);
	pci_hose_read_config_dword (hose, dev, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
	pcicsrbar_sz = ~pcicsrbar_sz + 1;

	if (out_hi < (0x100000000ull - pcicsrbar_sz) \|\|
	(out_lo > 0x100000000ull))
	pcicsrbar = 0x100000000ull - pcicsrbar_sz;
	else
	pcicsrbar = (out_lo - pcicsrbar_sz) & -pcicsrbar_sz;
	pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, pcicsrbar);

	out_lo = min(out_lo, (u64)pcicsrbar);

	debug("PCICSRBAR @ 0x%x\n", pcicsrbar);

	pci_set_region(reg++, pcicsrbar, CONFIG_SYS_CCSRBAR_PHYS,
	pcicsrbar_sz, PCI_REGION_SYS_MEMORY);
	hose->region_count++;

	/* see if we are a PCIe or PCI controller */
	pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);

	/* inbound */
	inbound = fsl_pci_setup_inbound_windows(hose, out_lo, pcie_cap, pi);

	for (r = 0; r < hose->region_count; r++)
	debug("PCI reg:%d %016llx:%016llx %016llx %08x\n", r,
	(u64)hose->regions[r].phys_start,
	hose->regions[r].bus_start,
	hose->regions[r].size,
	hose->regions[r].flags);

	pci_register_hose(hose);
	pciauto_config_init(hose); /* grab pci_{mem,prefetch,io} */
	hose->current_busno = hose->first_busno;

	out_be32(&pci->pedr, 0xffffffff); /* Clear any errors */
	out_be32(&pci->peer, ~0x20140); /* Enable All Error Interupts except
	* - Master abort (pci)
	* - Master PERR (pci)
	* - ICCA (PCIe)
	*/
	pci_hose_read_config_dword(hose, dev, PCI_DCR, &temp32);
	temp32 \|= 0xf000e; /* set URR, FER, NFER (but not CER) */
	pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32);

	if (pcie_cap == PCI_CAP_ID_EXP) {
	pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm);
	enabled = ltssm >= PCI_LTSSM_L0;

	#ifdef CONFIG_FSL_PCIE_RESET
	if (ltssm == 1) {
	int i;
	debug("....PCIe link error. " "LTSSM=0x%02x.", ltssm);
	/* assert PCIe reset */
	setbits_be32(&pci->pdb_stat, 0x08000000);
	(void) in_be32(&pci->pdb_stat);
	udelay(100);
	debug(" Asserting PCIe reset @%x = %x\n",
	&pci->pdb_stat, in_be32(&pci->pdb_stat));
	/* clear PCIe reset */
	clrbits_be32(&pci->pdb_stat, 0x08000000);
	asm("sync;isync");
	for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) {
	pci_hose_read_config_word(hose, dev, PCI_LTSSM,
	&ltssm);
	udelay(1000);
	debug("....PCIe link error. "
	"LTSSM=0x%02x.\n", ltssm);
	}
	enabled = ltssm >= PCI_LTSSM_L0;

	/* we need to re-write the bar0 since a reset will
	* clear it
	*/
	pci_hose_write_config_dword(hose, dev,
	PCI_BASE_ADDRESS_0, pcicsrbar);
	}
	#endif

	if (!enabled) {
	debug("....PCIE link error. Skipping scan."
	"LTSSM=0x%02x\n", ltssm);
	hose->last_busno = hose->first_busno;
	return;
	}

	out_be32(&pci->pme_msg_det, 0xffffffff);
	out_be32(&pci->pme_msg_int_en, 0xffffffff);
	#ifdef DEBUG
	pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16);
	neg_link_w = (temp16 & 0x3f0 ) >> 4;
	printf("...PCIE LTSSM=0x%x, Negotiated link width=%d\n",
	ltssm, neg_link_w);
	#endif
	hose->current_busno++; /* Start scan with secondary */
	pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
	}

	/* Use generic setup_device to initialize standard pci regs,
	* but do not allocate any windows since any BAR found (such
	* as PCSRBAR) is not in this cpu's memory space.
	*/
	pciauto_setup_device(hose, dev, 0, hose->pci_mem,
	hose->pci_prefetch, hose->pci_io);

	if (inbound) {
	pci_hose_read_config_word(hose, dev, PCI_COMMAND, &temp16);
	pci_hose_write_config_word(hose, dev, PCI_COMMAND,
	temp16 \| PCI_COMMAND_MEMORY);
	}

	#ifndef CONFIG_PCI_NOSCAN
	pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &temp8);

	/* Programming Interface (PCI_CLASS_PROG)
	* 0 == pci host or pcie root-complex,
	* 1 == pci agent or pcie end-point
	*/
	if (!temp8) {
	printf(" Scanning PCI bus %02x\n",
	hose->current_busno);
	hose->last_busno = pci_hose_scan_bus(hose, hose->current_busno);
	} else {
	debug(" Not scanning PCI bus %02x. PI=%x\n",
	hose->current_busno, temp8);
	hose->last_busno = hose->current_busno;
	}

	/* if we are PCIe - update limit regs and subordinate busno
	* for the virtual P2P bridge
	*/
	if (pcie_cap == PCI_CAP_ID_EXP) {
	pciauto_postscan_setup_bridge(hose, dev, hose->last_busno);
	}
	#else
	hose->last_busno = hose->current_busno;
	#endif

	/* Clear all error indications */
	if (pcie_cap == PCI_CAP_ID_EXP)
	out_be32(&pci->pme_msg_det, 0xffffffff);
	out_be32(&pci->pedr, 0xffffffff);

	pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16);
	if (temp16) {
	pci_hose_write_config_word(hose, dev, PCI_DSR, 0xffff);
	}

	pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16);
	if (temp16) {
	pci_hose_write_config_word(hose, dev, PCI_SEC_STATUS, 0xffff);
	}
	}

	int fsl_is_pci_agent(struct pci_controller *hose)
	{
	u8 prog_if;
	pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);

	pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prog_if);

	return (prog_if == FSL_PROG_IF_AGENT);
	}

	int fsl_pci_init_port(struct fsl_pci_info *pci_info,
	struct pci_controller *hose, int busno)
	{
	volatile ccsr_fsl_pci_t *pci;
	struct pci_region *r;

	pci = (ccsr_fsl_pci_t *) pci_info->regs;

	/* on non-PCIe controllers we don't have pme_msg_det so this code
	* should do nothing since the read will return 0
	*/
	if (in_be32(&pci->pme_msg_det)) {
	out_be32(&pci->pme_msg_det, 0xffffffff);
	debug (" with errors. Clearing. Now 0x%08x",
	pci->pme_msg_det);
	}

	r = hose->regions + hose->region_count;

	/* outbound memory */
	pci_set_region(r++,
	pci_info->mem_bus,
	pci_info->mem_phys,
	pci_info->mem_size,
	PCI_REGION_MEM);

	/* outbound io */
	pci_set_region(r++,
	pci_info->io_bus,
	pci_info->io_phys,
	pci_info->io_size,
	PCI_REGION_IO);

	hose->region_count = r - hose->regions;
	hose->first_busno = busno;

	fsl_pci_init(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);

	if (fsl_is_pci_agent(hose)) {
	fsl_pci_config_unlock(hose);
	hose->last_busno = hose->first_busno;
	}

	printf(" PCIE%x on bus %02x - %02x\n", pci_info->pci_num,
	hose->first_busno, hose->last_busno);

	return(hose->last_busno + 1);
	}

	/* Enable inbound PCI config cycles for agent/endpoint interface */
	void fsl_pci_config_unlock(struct pci_controller *hose)
	{
	pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
	u8 agent;
	u8 pcie_cap;
	u16 pbfr;

	pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &agent);
	if (!agent)
	return;

	pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
	if (pcie_cap != 0x0) {
	/* PCIe - set CFG_READY bit of Configuration Ready Register */
	pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1);
	} else {
	/* PCI - clear ACL bit of PBFR */
	pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr);
	pbfr &= ~0x20;
	pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr);
	}
	}

	#ifdef CONFIG_OF_BOARD_SETUP
	#include <libfdt.h>
	#include <fdt_support.h>

	void ft_fsl_pci_setup(void blob, const char pci_compat,
	struct pci_controller *hose, unsigned long ctrl_addr)
	{
	int off;
	u32 bus_range[2];
	phys_addr_t p_ctrl_addr = (phys_addr_t)ctrl_addr;

	/* convert ctrl_addr to true physical address */
	p_ctrl_addr = (phys_addr_t)ctrl_addr - CONFIG_SYS_CCSRBAR;
	p_ctrl_addr += CONFIG_SYS_CCSRBAR_PHYS;

	off = fdt_node_offset_by_compat_reg(blob, pci_compat, p_ctrl_addr);

	if (off < 0)
	return;

	/* We assume a cfg_addr not being set means we didn't setup the controller */
	if ((hose == NULL) \|\| (hose->cfg_addr == NULL)) {
	fdt_del_node(blob, off);
	} else {
	bus_range[0] = 0;
	bus_range[1] = hose->last_busno - hose->first_busno;
	fdt_setprop(blob, off, "bus-range", &bus_range[0], 2*4);
	fdt_pci_dma_ranges(blob, off, hose);
	}
	}
	#endif