dm: pci: add Freescale PowerPC PCIe driver

Add PCIe DM driver for Freescale PowerPC PCIe controllers.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>

5 files changed, 725 insertions, 0 deletions

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 429bb836a8..3fe38f7315 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -60,6 +60,14 @@ config PCIE_DW_MVEBU
 	  Armada-8K SoCs. The PCIe controller on Armada-8K is based on
 	  DesignWare hardware.
 
+config PCIE_FSL
+	bool "FSL PowerPC PCIe support"
+	depends on DM_PCI
+	help
+	  Say Y here if you want to enable PCIe controller support on FSL
+	  PowerPC MPC85xx, MPC86xx, B series, P series and T series SoCs.
+	  This driver does not support SRIO_PCIE_BOOT feature.
+
 config PCI_RCAR_GEN2
 	bool "Renesas RCar Gen2 PCIe driver"
 	depends on DM_PCI
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index bd392edba1..b5ebd50c85 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_SH7780_PCI) +=pci_sh7780.o
 obj-$(CONFIG_PCI_TEGRA) += pci_tegra.o
 obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o
 obj-$(CONFIG_PCIE_DW_MVEBU) += pcie_dw_mvebu.o
+obj-$(CONFIG_PCIE_FSL) += pcie_fsl.o pcie_fsl_fixup.o
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape.o
 obj-$(CONFIG_PCIE_LAYERSCAPE) += pcie_layerscape_fixup.o
 obj-$(CONFIG_PCIE_LAYERSCAPE_GEN4) += pcie_layerscape_gen4.o \
diff --git a/drivers/pci/pcie_fsl.c b/drivers/pci/pcie_fsl.c
new file mode 100644
index 0000000000..4d61a46cef
--- /dev/null
+++ b/drivers/pci/pcie_fsl.c
@@ -0,0 +1,610 @@
+// SPDX-License-Identifier: GPL-2.0+ OR X11
+/*
+ * Copyright 2019 NXP
+ *
+ * PCIe DM U-Boot driver for Freescale PowerPC SoCs
+ * Author: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <malloc.h>
+#include <mapmem.h>
+#include <pci.h>
+#include <asm/fsl_pci.h>
+#include <asm/fsl_serdes.h>
+#include <asm/io.h>
+#include "pcie_fsl.h"
+
+LIST_HEAD(fsl_pcie_list);
+
+static int fsl_pcie_link_up(struct fsl_pcie *pcie);
+
+static int fsl_pcie_addr_valid(struct fsl_pcie *pcie, pci_dev_t bdf)
+{
+	struct udevice *bus = pcie->bus;
+
+	if (!pcie->enabled)
+		return -ENXIO;
+
+	if (PCI_BUS(bdf) < bus->seq)
+		return -EINVAL;
+
+	if (PCI_BUS(bdf) > bus->seq && (!fsl_pcie_link_up(pcie) || pcie->mode))
+		return -EINVAL;
+
+	if (PCI_BUS(bdf) == bus->seq && (PCI_DEV(bdf) > 0 || PCI_FUNC(bdf) > 0))
+		return -EINVAL;
+
+	if (PCI_BUS(bdf) == (bus->seq + 1) && (PCI_DEV(bdf) > 0))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int fsl_pcie_read_config(struct udevice *bus, pci_dev_t bdf,
+				uint offset, ulong *valuep,
+				enum pci_size_t size)
+{
+	struct fsl_pcie *pcie = dev_get_priv(bus);
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	u32 val;
+
+	if (fsl_pcie_addr_valid(pcie, bdf)) {
+		*valuep = pci_get_ff(size);
+		return 0;
+	}
+
+	bdf = bdf - PCI_BDF(bus->seq, 0, 0);
+	val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
+	out_be32(&regs->cfg_addr, val);
+
+	sync();
+
+	switch (size) {
+	case PCI_SIZE_8:
+		*valuep = in_8((u8 *)&regs->cfg_data + (offset & 3));
+		break;
+	case PCI_SIZE_16:
+		*valuep = in_le16((u16 *)((u8 *)&regs->cfg_data +
+			  (offset & 2)));
+		break;
+	case PCI_SIZE_32:
+		*valuep = in_le32(&regs->cfg_data);
+		break;
+	}
+
+	return 0;
+}
+
+static int fsl_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
+				 uint offset, ulong value,
+				 enum pci_size_t size)
+{
+	struct fsl_pcie *pcie = dev_get_priv(bus);
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	u32 val;
+	u8 val_8;
+	u16 val_16;
+	u32 val_32;
+
+	if (fsl_pcie_addr_valid(pcie, bdf))
+		return 0;
+
+	bdf = bdf - PCI_BDF(bus->seq, 0, 0);
+	val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000;
+	out_be32(&regs->cfg_addr, val);
+
+	sync();
+
+	switch (size) {
+	case PCI_SIZE_8:
+		val_8 = value;
+		out_8((u8 *)&regs->cfg_data + (offset & 3), val_8);
+		break;
+	case PCI_SIZE_16:
+		val_16 = value;
+		out_le16((u16 *)((u8 *)&regs->cfg_data + (offset & 2)), val_16);
+		break;
+	case PCI_SIZE_32:
+		val_32 = value;
+		out_le32(&regs->cfg_data, val_32);
+		break;
+	}
+
+	return 0;
+}
+
+static int fsl_pcie_hose_read_config(struct fsl_pcie *pcie, uint offset,
+				     ulong *valuep, enum pci_size_t size)
+{
+	int ret;
+	struct udevice *bus = pcie->bus;
+
+	ret = fsl_pcie_read_config(bus, PCI_BDF(bus->seq, 0, 0),
+				   offset, valuep, size);
+
+	return ret;
+}
+
+static int fsl_pcie_hose_write_config(struct fsl_pcie *pcie, uint offset,
+				      ulong value, enum pci_size_t size)
+{
+	struct udevice *bus = pcie->bus;
+
+	return fsl_pcie_write_config(bus, PCI_BDF(bus->seq, 0, 0),
+				     offset, value, size);
+}
+
+static int fsl_pcie_hose_read_config_byte(struct fsl_pcie *pcie, uint offset,
+					  u8 *valuep)
+{
+	ulong val;
+	int ret;
+
+	ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_8);
+	*valuep = val;
+
+	return ret;
+}
+
+static int fsl_pcie_hose_read_config_word(struct fsl_pcie *pcie, uint offset,
+					  u16 *valuep)
+{
+	ulong val;
+	int ret;
+
+	ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_16);
+	*valuep = val;
+
+	return ret;
+}
+
+static int fsl_pcie_hose_read_config_dword(struct fsl_pcie *pcie, uint offset,
+					   u32 *valuep)
+{
+	ulong val;
+	int ret;
+
+	ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_32);
+	*valuep = val;
+
+	return ret;
+}
+
+static int fsl_pcie_hose_write_config_byte(struct fsl_pcie *pcie, uint offset,
+					   u8 value)
+{
+	return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_8);
+}
+
+static int fsl_pcie_hose_write_config_word(struct fsl_pcie *pcie, uint offset,
+					   u16 value)
+{
+	return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_16);
+}
+
+static int fsl_pcie_hose_write_config_dword(struct fsl_pcie *pcie, uint offset,
+					    u32 value)
+{
+	return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_32);
+}
+
+static int fsl_pcie_link_up(struct fsl_pcie *pcie)
+{
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	u16 ltssm;
+
+	if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) {
+		ltssm = (in_be32(&regs->pex_csr0)
+			& PEX_CSR0_LTSSM_MASK) >> PEX_CSR0_LTSSM_SHIFT;
+		return ltssm == LTSSM_L0_REV3;
+	}
+
+	fsl_pcie_hose_read_config_word(pcie, PCI_LTSSM, &ltssm);
+
+	return ltssm == LTSSM_L0;
+}
+
+static bool fsl_pcie_is_agent(struct fsl_pcie *pcie)
+{
+	u8 header_type;
+
+	fsl_pcie_hose_read_config_byte(pcie, PCI_HEADER_TYPE, &header_type);
+
+	return (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL;
+}
+
+static int fsl_pcie_setup_law(struct fsl_pcie *pcie)
+{
+	struct pci_region *io, *mem, *pref;
+
+	pci_get_regions(pcie->bus, &io, &mem, &pref);
+
+	if (mem)
+		set_next_law(mem->phys_start,
+			     law_size_bits(mem->size),
+			     pcie->law_trgt_if);
+
+	if (io)
+		set_next_law(io->phys_start,
+			     law_size_bits(io->size),
+			     pcie->law_trgt_if);
+
+	return 0;
+}
+
+static void fsl_pcie_config_ready(struct fsl_pcie *pcie)
+{
+	ccsr_fsl_pci_t *regs = pcie->regs;
+
+	if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) {
+		setbits_be32(&regs->config, FSL_PCIE_V3_CFG_RDY);
+		return;
+	}
+
+	fsl_pcie_hose_write_config_byte(pcie, FSL_PCIE_CFG_RDY, 0x1);
+}
+
+static int fsl_pcie_setup_outbound_win(struct fsl_pcie *pcie, int idx,
+				       int type, u64 phys, u64 bus_addr,
+				       pci_size_t size)
+{
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	pot_t *po = &regs->pot[idx];
+	u32 war, sz;
+
+	if (idx < 0)
+		return -EINVAL;
+
+	out_be32(&po->powbar, phys >> 12);
+	out_be32(&po->potar, bus_addr >> 12);
+#ifdef CONFIG_SYS_PCI_64BIT
+	out_be32(&po->potear, bus_addr >> 44);
+#else
+	out_be32(&po->potear, 0);
+#endif
+
+	sz = (__ilog2_u64((u64)size) - 1);
+	war = POWAR_EN | sz;
+
+	if (type == PCI_REGION_IO)
+		war |= POWAR_IO_READ | POWAR_IO_WRITE;
+	else
+		war |= POWAR_MEM_READ | POWAR_MEM_WRITE;
+
+	out_be32(&po->powar, war);
+
+	return 0;
+}
+
+static int fsl_pcie_setup_inbound_win(struct fsl_pcie *pcie, int idx,
+				      bool pf, u64 phys, u64 bus_addr,
+				      pci_size_t size)
+{
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	pit_t *pi = &regs->pit[idx];
+	u32 sz = (__ilog2_u64(size) - 1);
+	u32 flag = PIWAR_LOCAL;
+
+	if (idx < 0)
+		return -EINVAL;
+
+	out_be32(&pi->pitar, phys >> 12);
+	out_be32(&pi->piwbar, bus_addr >> 12);
+
+#ifdef CONFIG_SYS_PCI_64BIT
+	out_be32(&pi->piwbear, bus_addr >> 44);
+#else
+	out_be32(&pi->piwbear, 0);
+#endif
+
+	if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A005434))
+		flag = 0;
+
+	flag |= PIWAR_EN | PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
+	if (pf)
+		flag |= PIWAR_PF;
+	out_be32(&pi->piwar, flag | sz);
+
+	return 0;
+}
+
+static int fsl_pcie_setup_outbound_wins(struct fsl_pcie *pcie)
+{
+	struct pci_region *io, *mem, *pref;
+	int idx = 1; /* skip 0 */
+
+	pci_get_regions(pcie->bus, &io, &mem, &pref);
+
+	if (io)
+		/* ATU : OUTBOUND : IO */
+		fsl_pcie_setup_outbound_win(pcie, idx++,
+					    PCI_REGION_IO,
+					    io->phys_start,
+					    io->bus_start,
+					    io->size);
+
+	if (mem)
+		/* ATU : OUTBOUND : MEM */
+		fsl_pcie_setup_outbound_win(pcie, idx++,
+					    PCI_REGION_MEM,
+					    mem->phys_start,
+					    mem->bus_start,
+					    mem->size);
+	return 0;
+}
+
+static int fsl_pcie_setup_inbound_wins(struct fsl_pcie *pcie)
+{
+	phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
+	pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
+	u64 sz = min((u64)gd->ram_size, (1ull << 32));
+	pci_size_t pci_sz;
+	int idx;
+
+	if (pcie->block_rev >= PEX_IP_BLK_REV_2_2)
+		idx = 2;
+	else
+		idx = 3;
+
+	pci_sz = 1ull << __ilog2_u64(sz);
+
+	dev_dbg(pcie->bus, "R0 bus_start: %llx phys_start: %llx size: %llx\n",
+		(u64)bus_start, (u64)phys_start, (u64)sz);
+
+	/* 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);
+
+	fsl_pcie_setup_inbound_win(pcie, idx--, true,
+				   CONFIG_SYS_PCI_MEMORY_PHYS,
+				   CONFIG_SYS_PCI_MEMORY_BUS, 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);
+
+	dev_dbg(pcie->bus, "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);
+
+	fsl_pcie_setup_inbound_win(pcie, idx--, true,
+				   CONFIG_SYS_PCI_MEMORY_PHYS,
+				   CONFIG_SYS_PCI64_MEMORY_BUS, pci_sz);
+#endif
+
+	return 0;
+}
+
+static int fsl_pcie_init_atmu(struct fsl_pcie *pcie)
+{
+	fsl_pcie_setup_outbound_wins(pcie);
+	fsl_pcie_setup_inbound_wins(pcie);
+
+	return 0;
+}
+
+static int fsl_pcie_init_port(struct fsl_pcie *pcie)
+{
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	u32 val_32;
+	u16 val_16;
+
+	fsl_pcie_init_atmu(pcie);
+
+	if (IS_ENABLED(CONFIG_FSL_PCIE_DISABLE_ASPM)) {
+		val_32 = 0;
+		fsl_pcie_hose_read_config_dword(pcie, PCI_LCR, &val_32);
+		val_32 &= ~0x03;
+		fsl_pcie_hose_write_config_dword(pcie, PCI_LCR, val_32);
+		udelay(1);
+	}
+
+	if (IS_ENABLED(CONFIG_FSL_PCIE_RESET)) {
+		u16 ltssm;
+		int i;
+
+		if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) {
+			/* assert PCIe reset */
+			setbits_be32(&regs->pdb_stat, 0x08000000);
+			(void)in_be32(&regs->pdb_stat);
+			udelay(1000);
+			/* clear PCIe reset */
+			clrbits_be32(&regs->pdb_stat, 0x08000000);
+			asm("sync;isync");
+			for (i = 0; i < 100 && !fsl_pcie_link_up(pcie); i++)
+				udelay(1000);
+		} else {
+			fsl_pcie_hose_read_config_word(pcie, PCI_LTSSM, &ltssm);
+			if (ltssm == 1) {
+				/* assert PCIe reset */
+				setbits_be32(&regs->pdb_stat, 0x08000000);
+				(void)in_be32(&regs->pdb_stat);
+				udelay(100);
+				/* clear PCIe reset */
+				clrbits_be32(&regs->pdb_stat, 0x08000000);
+				asm("sync;isync");
+				for (i = 0; i < 100 &&
+				     !fsl_pcie_link_up(pcie); i++)
+					udelay(1000);
+			}
+		}
+	}
+
+	if (IS_ENABLED(CONFIG_SYS_P4080_ERRATUM_PCIE_A003) &&
+	    !fsl_pcie_link_up(pcie)) {
+		serdes_corenet_t *srds_regs;
+
+		srds_regs = (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR;
+		val_32 = in_be32(&srds_regs->srdspccr0);
+
+		if ((val_32 >> 28) == 3) {
+			int i;
+
+			out_be32(&srds_regs->srdspccr0, 2 << 28);
+			setbits_be32(&regs->pdb_stat, 0x08000000);
+			in_be32(&regs->pdb_stat);
+			udelay(100);
+			clrbits_be32(&regs->pdb_stat, 0x08000000);
+			asm("sync;isync");
+			for (i = 0; i < 100 && !fsl_pcie_link_up(pcie); i++)
+				udelay(1000);
+		}
+	}
+
+	/*
+	 * The Read-Only Write Enable bit defaults to 1 instead of 0.
+	 * Set to 0 to protect the read-only registers.
+	 */
+	if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A007815))
+		clrbits_be32(&regs->dbi_ro_wr_en, 0x01);
+
+	/*
+	 * Enable All Error Interrupts except
+	 * - Master abort (pci)
+	 * - Master PERR (pci)
+	 * - ICCA (PCIe)
+	 */
+	out_be32(&regs->peer, ~0x20140);
+
+	/* set URR, FER, NFER (but not CER) */
+	fsl_pcie_hose_read_config_dword(pcie, PCI_DCR, &val_32);
+	val_32 |= 0xf000e;
+	fsl_pcie_hose_write_config_dword(pcie, PCI_DCR, val_32);
+
+	/* Clear all error indications */
+	out_be32(&regs->pme_msg_det, 0xffffffff);
+	out_be32(&regs->pme_msg_int_en, 0xffffffff);
+	out_be32(&regs->pedr, 0xffffffff);
+
+	fsl_pcie_hose_read_config_word(pcie, PCI_DSR, &val_16);
+	if (val_16)
+		fsl_pcie_hose_write_config_word(pcie, PCI_DSR, 0xffff);
+
+	fsl_pcie_hose_read_config_word(pcie, PCI_SEC_STATUS, &val_16);
+	if (val_16)
+		fsl_pcie_hose_write_config_word(pcie, PCI_SEC_STATUS, 0xffff);
+
+	return 0;
+}
+
+static int fsl_pcie_fixup_classcode(struct fsl_pcie *pcie)
+{
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	u32 val;
+
+	setbits_be32(&regs->dbi_ro_wr_en, 0x01);
+	fsl_pcie_hose_read_config_dword(pcie, PCI_CLASS_REVISION, &val);
+	val &= 0xff;
+	val |= PCI_CLASS_BRIDGE_PCI << 16;
+	fsl_pcie_hose_write_config_dword(pcie, PCI_CLASS_REVISION, val);
+	clrbits_be32(&regs->dbi_ro_wr_en, 0x01);
+
+	return 0;
+}
+
+static int fsl_pcie_init_rc(struct fsl_pcie *pcie)
+{
+	return fsl_pcie_fixup_classcode(pcie);
+}
+
+static int fsl_pcie_init_ep(struct fsl_pcie *pcie)
+{
+	fsl_pcie_config_ready(pcie);
+
+	return 0;
+}
+
+static int fsl_pcie_probe(struct udevice *dev)
+{
+	struct fsl_pcie *pcie = dev_get_priv(dev);
+	ccsr_fsl_pci_t *regs = pcie->regs;
+	u16 val_16;
+
+	pcie->bus = dev;
+	pcie->block_rev = in_be32(&regs->block_rev1);
+
+	list_add(&pcie->list, &fsl_pcie_list);
+	pcie->enabled = is_serdes_configured(PCIE1 + pcie->idx);
+	if (!pcie->enabled) {
+		printf("PCIe%d: %s disabled\n", pcie->idx, dev->name);
+		return 0;
+	}
+
+	fsl_pcie_setup_law(pcie);
+
+	pcie->mode = fsl_pcie_is_agent(pcie);
+
+	fsl_pcie_init_port(pcie);
+
+	printf("PCIe%d: %s ", pcie->idx, dev->name);
+
+	if (pcie->mode) {
+		printf("Endpoint");
+		fsl_pcie_init_ep(pcie);
+	} else {
+		printf("Root Complex");
+		fsl_pcie_init_rc(pcie);
+	}
+
+	if (!fsl_pcie_link_up(pcie)) {
+		printf(": %s\n", pcie->mode ? "undetermined link" : "no link");
+		return 0;
+	}
+
+	fsl_pcie_hose_read_config_word(pcie, PCI_LSR, &val_16);
+	printf(": x%d gen%d\n", (val_16 & 0x3f0) >> 4, (val_16 & 0xf));
+
+	return 0;
+}
+
+static int fsl_pcie_ofdata_to_platdata(struct udevice *dev)
+{
+	struct fsl_pcie *pcie = dev_get_priv(dev);
+	int ret;
+
+	pcie->regs = dev_remap_addr(dev);
+	if (!pcie->regs) {
+		pr_err("\"reg\" resource not found\n");
+		return -EINVAL;
+	}
+
+	ret = dev_read_u32(dev, "law_trgt_if", &pcie->law_trgt_if);
+	if (ret < 0) {
+		pr_err("\"law_trgt_if\" not found\n");
+		return ret;
+	}
+
+	pcie->idx = (dev_read_addr(dev) - 0xffe240000) / 0x10000;
+
+	return 0;
+}
+
+static const struct dm_pci_ops fsl_pcie_ops = {
+	.read_config	= fsl_pcie_read_config,
+	.write_config	= fsl_pcie_write_config,
+};
+
+static const struct udevice_id fsl_pcie_ids[] = {
+	{ .compatible = "fsl,pcie-t2080" },
+	{ }
+};
+
+U_BOOT_DRIVER(fsl_pcie) = {
+	.name = "fsl_pcie",
+	.id = UCLASS_PCI,
+	.of_match = fsl_pcie_ids,
+	.ops = &fsl_pcie_ops,
+	.ofdata_to_platdata = fsl_pcie_ofdata_to_platdata,
+	.probe = fsl_pcie_probe,
+	.priv_auto_alloc_size = sizeof(struct fsl_pcie),
+};
diff --git a/drivers/pci/pcie_fsl.h b/drivers/pci/pcie_fsl.h
new file mode 100644
index 0000000000..5eefc31fa9
--- /dev/null
+++ b/drivers/pci/pcie_fsl.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2019 NXP
+ *
+ * PCIe DM U-Boot driver for Freescale PowerPC SoCs
+ * Author: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+ */
+
+#ifndef _PCIE_FSL_H_
+#define _PCIE_FSL_H_
+
+#ifdef CONFIG_SYS_FSL_PCI_VER_3_X
+#define FSL_PCIE_CAP_ID			0x70
+#else
+#define FSL_PCIE_CAP_ID			0x4c
+#endif
+/* PCIe Device Control Register */
+#define PCI_DCR				(FSL_PCIE_CAP_ID + 0x08)
+/* PCIe Device Status Register */
+#define PCI_DSR				(FSL_PCIE_CAP_ID + 0x0a)
+/* PCIe Link Control Register */
+#define PCI_LCR				(FSL_PCIE_CAP_ID + 0x10)
+/* PCIe Link Status Register */
+#define PCI_LSR				(FSL_PCIE_CAP_ID + 0x12)
+
+#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
+
+#define PEX_CSR0_LTSSM_MASK		0xFC
+#define PEX_CSR0_LTSSM_SHIFT		2
+#define LTSSM_L0_REV3			0x11
+#define LTSSM_L0			0x16
+
+struct fsl_pcie {
+	int idx;
+	struct udevice *bus;
+	void __iomem *regs;
+	u32 law_trgt_if;		/* LAW target ID */
+	u32 block_rev;			/* IP block revision */
+	bool mode;			/* RC&EP mode flag */
+	bool enabled;			/* Enable status */
+	struct list_head list;
+};
+
+extern struct list_head fsl_pcie_list;
+
+#endif /* _PCIE_FSL_H_ */
diff --git a/drivers/pci/pcie_fsl_fixup.c b/drivers/pci/pcie_fsl_fixup.c
new file mode 100644
index 0000000000..cbdc0ef291
--- /dev/null
+++ b/drivers/pci/pcie_fsl_fixup.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0+ OR X11
+/*
+ * Copyright 2019 NXP
+ *
+ * PCIe Kernel DT fixup of DM U-Boot driver for Freescale PowerPC SoCs
+ * Author: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <common.h>
+#ifdef CONFIG_OF_BOARD_SETUP
+#include <dm.h>
+#include <fdt_support.h>
+#include <asm/fsl_pci.h>
+#include <linux/libfdt.h>
+#include "pcie_fsl.h"
+
+static void ft_fsl_pcie_setup(void *blob, struct fsl_pcie *pcie)
+{
+	struct pci_controller *hose = dev_get_uclass_priv(pcie->bus);
+	fdt_addr_t regs_addr;
+	int off;
+
+	regs_addr = dev_read_addr(pcie->bus);
+	off = fdt_node_offset_by_compat_reg(blob, FSL_PCIE_COMPAT, regs_addr);
+	if (off < 0) {
+		printf("%s: Fail to find PCIe node@0x%pa\n",
+		       FSL_PCIE_COMPAT, &regs_addr);
+		return;
+	}
+
+	if (!hose || !pcie->enabled)
+		fdt_del_node(blob, off);
+	else
+		fdt_pci_dma_ranges(blob, off, hose);
+}
+
+/* Fixup Kernel DT for PCIe */
+void pci_of_setup(void *blob, bd_t *bd)
+{
+	struct fsl_pcie *pcie;
+
+	list_for_each_entry(pcie, &fsl_pcie_list, list)
+		ft_fsl_pcie_setup(blob, pcie);
+}
+
+#else
+void pci_of_setup(void *blob, bd_t *bd)
+{
+}
+#endif