u-boot/drivers/pci/fsl_pci_init.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2007-2012 Freescale Semiconductor, Inc.
 */

#include <common.h>
#include <env.h>
#include <init.h>
#include <log.h>
#include <malloc.h>
#include <asm/fsl_serdes.h>
#include <asm/global_data.h>
#include <linux/delay.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>

#define MAX_PCI_REGIONS 7

#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);
#ifdef CONFIG_SYS_FSL_ERRATUM_A005434
	u32 flag = 0;
#else
	u32 flag = PIWAR_LOCAL;
#endif

	flag |= PIWAR_EN | 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;

	/* Reset hose to make sure its in a clean state */
	memset(hose, 0, sizeof(struct pci_controller));

	hose->regions = (struct pci_region *)
		calloc(1, MAX_PCI_REGIONS * sizeof(struct pci_region));

	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;
}

#ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
static void fsl_pcie_boot_master(pit_t *pi)
{
	/* configure inbound window for slave's u-boot image */
	debug("PCIEBOOT - MASTER: Inbound window for slave's image; "
			"Local = 0x%llx, Bus = 0x%llx, Size = 0x%x\n",
			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1,
			CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
	struct pci_region r_inbound;
	u32 sz_inbound = __ilog2_u64(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE)
					- 1;
	pci_set_region(&r_inbound,
		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1,
		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
		sz_inbound,
		PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);

	set_inbound_window(pi--, &r_inbound,
		CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);

	/* configure inbound window for slave's u-boot image */
	debug("PCIEBOOT - MASTER: Inbound window for slave's image; "
			"Local = 0x%llx, Bus = 0x%llx, Size = 0x%x\n",
			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2,
			CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
	pci_set_region(&r_inbound,
		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2,
		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
		sz_inbound,
		PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);

	set_inbound_window(pi--, &r_inbound,
		CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);

	/* configure inbound window for slave's ucode and ENV */
	debug("PCIEBOOT - MASTER: Inbound window for slave's "
			"ucode and ENV; "
			"Local = 0x%llx, Bus = 0x%llx, Size = 0x%x\n",
			(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS,
			(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS,
			CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE);
	sz_inbound = __ilog2_u64(CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE)
				- 1;
	pci_set_region(&r_inbound,
		CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS,
		CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS,
		sz_inbound,
		PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);

	set_inbound_window(pi--, &r_inbound,
		CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE);
}

static void fsl_pcie_boot_master_release_slave(int port)
{
	unsigned long release_addr;

	/* now release slave's core 0 */
	switch (port) {
	case 1:
		release_addr = CONFIG_SYS_PCIE1_MEM_VIRT
			+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET;
		break;
#ifdef CONFIG_SYS_PCIE2_MEM_VIRT
	case 2:
		release_addr = CONFIG_SYS_PCIE2_MEM_VIRT
			+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET;
		break;
#endif
#ifdef CONFIG_SYS_PCIE3_MEM_VIRT
	case 3:
		release_addr = CONFIG_SYS_PCIE3_MEM_VIRT
			+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET;
		break;
#endif
	default:
		release_addr = 0;
		break;
	}
	if (release_addr != 0) {
		out_be32((void *)release_addr,
			CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
		debug("PCIEBOOT - MASTER: "
			"Release slave successfully! Now the slave should start up!\n");
	} else {
		debug("PCIEBOOT - MASTER: "
			"Release slave failed!\n");
	}
}
#endif

void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
{
	u32 cfg_addr = (u32)&((ccsr_fsl_pci_t *)pci_info->regs)->cfg_addr;
	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;
	int pcie_cap_pos;
	int pci_dcr;
	int pci_dsr;
	int pci_lsr;

#if defined(CONFIG_FSL_PCIE_DISABLE_ASPM)
	int pci_lcr;
#endif

	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;

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

	pci_setup_indirect(hose, cfg_addr, cfg_data);

#ifdef PEX_CCB_DIV
	/* Configure the PCIE controller core clock ratio */
	pci_hose_write_config_dword(hose, dev, 0x440,
				    ((gd->bus_clk / 1000000) *
				     (16 / PEX_CCB_DIV)) / 333);
#endif
	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;
		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 */
	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
	pci_dcr = pcie_cap_pos + 0x08;
	pci_dsr = pcie_cap_pos + 0x0a;
	pci_lsr = pcie_cap_pos + 0x12;

	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);

#ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
	/* boot from PCIE --master */
	char *s = env_get("bootmaster");
	char pcie[6];
	sprintf(pcie, "PCIE%d", pci_info->pci_num);

	if (s && (strcmp(s, pcie) == 0)) {
		debug("PCIEBOOT - MASTER: Master port [ %d ] for pcie boot.\n",
				pci_info->pci_num);
		fsl_pcie_boot_master((pit_t *)pi);
	} else {
		/* inbound */
		inbound = fsl_pci_setup_inbound_windows(hose,
					out_lo, pcie_cap, pi);
	}
#else
	/* inbound */
	inbound = fsl_pci_setup_inbound_windows(hose, out_lo, pcie_cap, pi);
#endif

	for (r = 0; r < hose->region_count; r++)
		debug("PCI reg:%d %016llx:%016llx %016llx %08lx\n", r,
			(u64)hose->regions[r].phys_start,
			(u64)hose->regions[r].bus_start,
			(u64)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 Interrupts 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 defined(CONFIG_FSL_PCIE_DISABLE_ASPM)
	pci_lcr = pcie_cap_pos + 0x10;
	temp32 = 0;
	pci_hose_read_config_dword(hose, dev, pci_lcr, &temp32);
	temp32 &= ~0x03;		/* Disable ASPM  */
	pci_hose_write_config_dword(hose, dev, pci_lcr, temp32);
	udelay(1);
#endif
	if (pcie_cap == PCI_CAP_ID_EXP) {
		if (block_rev >= PEX_IP_BLK_REV_3_0) {
#define PEX_CSR0_LTSSM_MASK	0xFC
#define PEX_CSR0_LTSSM_SHIFT	2
			ltssm = (in_be32(&pci->pex_csr0)
				& PEX_CSR0_LTSSM_MASK) >> PEX_CSR0_LTSSM_SHIFT;
			enabled = (ltssm == 0x11) ? 1 : 0;
#ifdef CONFIG_FSL_PCIE_RESET
			int i;
			/* assert PCIe reset */
			setbits_be32(&pci->pdb_stat, 0x08000000);
			(void) in_be32(&pci->pdb_stat);
			udelay(1000);
			/* 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);
			}
#endif
		} else {
		/* pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm); */
		/* enabled = ltssm >= PCI_LTSSM_L0; */
		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 @%p = %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
	}

#ifdef CONFIG_SYS_P4080_ERRATUM_PCIE_A003
		if (enabled == 0) {
			serdes_corenet_t *srds_regs = (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR;
			temp32 = in_be32(&srds_regs->srdspccr0);

			if ((temp32 >> 28) == 3) {
				int i;

				out_be32(&srds_regs->srdspccr0, 2 << 28);
				setbits_be32(&pci->pdb_stat, 0x08000000);
				in_be32(&pci->pdb_stat);
				udelay(100);
				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);
				}
				enabled = ltssm >= PCI_LTSSM_L0;
			}
		}
#endif
		if (!enabled) {
			/* Let the user know there's no PCIe link for root
			 * complex. for endpoint, the link may not setup, so
			 * print undetermined.
			 */
			if (fsl_is_pci_agent(hose))
				printf("undetermined, regs @ 0x%lx\n", pci_info->regs);
			else
				printf("no link, regs @ 0x%lx\n", pci_info->regs);
			hose->last_busno = hose->first_busno;
			return;
		}

		out_be32(&pci->pme_msg_det, 0xffffffff);
		out_be32(&pci->pme_msg_int_en, 0xffffffff);

		/* Print the negotiated PCIe link width */
		pci_hose_read_config_word(hose, dev, pci_lsr, &temp16);
		printf("x%d gen%d, regs @ 0x%lx\n", (temp16 & 0x3f0) >> 4,
		       (temp16 & 0xf), pci_info->regs);

		hose->current_busno++; /* Start scan with secondary */
		pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
	}

#ifdef CONFIG_SYS_FSL_ERRATUM_A007815
	/* The Read-Only Write Enable bit defaults to 1 instead of 0.
	 * Set to 0 to protect the read-only registers.
	 */
	clrbits_be32(&pci->dbi_ro_wr_en, 0x01);
#endif

	/* 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
	if (!fsl_is_pci_agent(hose)) {
		debug("           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)
{
	int pcie_cap_pos;
	u8 pcie_cap;
	pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);

	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
	if (pcie_cap == PCI_CAP_ID_EXP) {
		u8 header_type;

		pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE,
					  &header_type);
		return (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL;
	} else {
		u8 prog_if;

		pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prog_if);
		/* Programming Interface (PCI_CLASS_PROG)
		 * 0 == pci host or pcie root-complex,
		 * 1 == pci agent or pcie end-point
		 */
		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_dev_t dev = PCI_BDF(busno,0,0);
	int pcie_cap_pos;
	u8 pcie_cap;

	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, pci_info);

	if (fsl_is_pci_agent(hose)) {
		fsl_pci_config_unlock(hose);
		hose->last_busno = hose->first_busno;
#ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
	} else {
		/* boot from PCIE --master releases slave's core 0 */
		char *s = env_get("bootmaster");
		char pcie[6];
		sprintf(pcie, "PCIE%d", pci_info->pci_num);

		if (s && (strcmp(s, pcie) == 0))
			fsl_pcie_boot_master_release_slave(pci_info->pci_num);
#endif
	}

	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
	printf("PCI%s%x: Bus %02x - %02x\n", pcie_cap == PCI_CAP_ID_EXP ?
		"e" : "", 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);
	int pcie_cap_pos;
	u8 pcie_cap;
	u16 pbfr;

	if (!fsl_is_pci_agent(hose))
		return;

	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
	if (pcie_cap != 0x0) {
		ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *)hose->cfg_addr;
		u32 block_rev = in_be32(&pci->block_rev1);
		/* PCIe - set CFG_READY bit of Configuration Ready Register */
		if (block_rev >= PEX_IP_BLK_REV_3_0)
			setbits_be32(&pci->config, FSL_PCIE_V3_CFG_RDY);
		else
			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);
	}
}

#if defined(CONFIG_PCIE1) || defined(CONFIG_PCIE2) || \
    defined(CONFIG_PCIE3) || defined(CONFIG_PCIE4)
int fsl_configure_pcie(struct fsl_pci_info *info,
			struct pci_controller *hose,
			const char *connected, int busno)
{
	int is_endpoint;

	set_next_law(info->mem_phys, law_size_bits(info->mem_size), info->law);
	set_next_law(info->io_phys, law_size_bits(info->io_size), info->law);

	is_endpoint = fsl_setup_hose(hose, info->regs);
	printf("PCIe%u: %s", info->pci_num,
		is_endpoint ? "Endpoint" : "Root Complex");
	if (connected)
		printf(" of %s", connected);
	puts(", ");

	return fsl_pci_init_port(info, hose, busno);
}

#if defined(CONFIG_FSL_CORENET)
#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
	#define _DEVDISR_PCIE1 FSL_CORENET_DEVDISR3_PCIE1
	#define _DEVDISR_PCIE2 FSL_CORENET_DEVDISR3_PCIE2
	#define _DEVDISR_PCIE3 FSL_CORENET_DEVDISR3_PCIE3
	#define _DEVDISR_PCIE4 FSL_CORENET_DEVDISR3_PCIE4
#else
	#define _DEVDISR_PCIE1 FSL_CORENET_DEVDISR_PCIE1
	#define _DEVDISR_PCIE2 FSL_CORENET_DEVDISR_PCIE2
	#define _DEVDISR_PCIE3 FSL_CORENET_DEVDISR_PCIE3
	#define _DEVDISR_PCIE4 FSL_CORENET_DEVDISR_PCIE4
#endif
	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
#elif defined(CONFIG_MPC85xx)
	#define _DEVDISR_PCIE1 MPC85xx_DEVDISR_PCIE
	#define _DEVDISR_PCIE2 MPC85xx_DEVDISR_PCIE2
	#define _DEVDISR_PCIE3 MPC85xx_DEVDISR_PCIE3
	#define _DEVDISR_PCIE4 0
	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
#elif defined(CONFIG_MPC86xx)
	#define _DEVDISR_PCIE1 MPC86xx_DEVDISR_PCIE1
	#define _DEVDISR_PCIE2 MPC86xx_DEVDISR_PCIE2
	#define _DEVDISR_PCIE3 0
	#define _DEVDISR_PCIE4 0
	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR \
		(&((immap_t *)CONFIG_SYS_IMMR)->im_gur)
#else
#error "No defines for DEVDISR_PCIE"
#endif

/* Implement a dummy function for those platforms w/o SERDES */
static const char *__board_serdes_name(enum srds_prtcl device)
{
	switch (device) {
#ifdef CONFIG_SYS_PCIE1_NAME
	case PCIE1:
		return CONFIG_SYS_PCIE1_NAME;
#endif
#ifdef CONFIG_SYS_PCIE2_NAME
	case PCIE2:
		return CONFIG_SYS_PCIE2_NAME;
#endif
#ifdef CONFIG_SYS_PCIE3_NAME
	case PCIE3:
		return CONFIG_SYS_PCIE3_NAME;
#endif
#ifdef CONFIG_SYS_PCIE4_NAME
	case PCIE4:
		return CONFIG_SYS_PCIE4_NAME;
#endif
	default:
		return NULL;
	}

	return NULL;
}

__attribute__((weak, alias("__board_serdes_name"))) const char *
board_serdes_name(enum srds_prtcl device);

static u32 devdisr_mask[] = {
	_DEVDISR_PCIE1,
	_DEVDISR_PCIE2,
	_DEVDISR_PCIE3,
	_DEVDISR_PCIE4,
};

int fsl_pcie_init_ctrl(int busno, u32 devdisr, enum srds_prtcl dev,
			struct fsl_pci_info *pci_info)
{
	struct pci_controller *hose;
	int num = dev - PCIE1;

	hose = calloc(1, sizeof(struct pci_controller));
	if (!hose)
		return busno;

	if (is_serdes_configured(dev) && !(devdisr & devdisr_mask[num])) {
		busno = fsl_configure_pcie(pci_info, hose,
				board_serdes_name(dev), busno);
	} else {
		printf("PCIe%d: disabled\n", num + 1);
	}

	return busno;
}

int fsl_pcie_init_board(int busno)
{
	struct fsl_pci_info pci_info;
	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC8xxx_GUTS_ADDR;
	u32 devdisr;
	u32 *addr;

#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
	addr = &gur->devdisr3;
#else
	addr = &gur->devdisr;
#endif
	devdisr = in_be32(addr);

#ifdef CONFIG_PCIE1
	SET_STD_PCIE_INFO(pci_info, 1);
	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE1, &pci_info);
#else
	setbits_be32(addr, _DEVDISR_PCIE1); /* disable */
#endif

#ifdef CONFIG_PCIE2
	SET_STD_PCIE_INFO(pci_info, 2);
	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE2, &pci_info);
#else
	setbits_be32(addr, _DEVDISR_PCIE2); /* disable */
#endif

#ifdef CONFIG_PCIE3
	SET_STD_PCIE_INFO(pci_info, 3);
	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE3, &pci_info);
#else
	setbits_be32(addr, _DEVDISR_PCIE3); /* disable */
#endif

#ifdef CONFIG_PCIE4
	SET_STD_PCIE_INFO(pci_info, 4);
	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE4, &pci_info);
#else
	setbits_be32(addr, _DEVDISR_PCIE4); /* disable */
#endif

 	return busno;
}
#else
int fsl_pcie_init_ctrl(int busno, u32 devdisr, enum srds_prtcl dev,
			struct fsl_pci_info *pci_info)
{
	return busno;
}

int fsl_pcie_init_board(int busno)
{
	return busno;
}
#endif

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

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

	hose = find_hose_by_cfg_addr((void *)(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