pci: synquacer: Add SynQuacer ECAM based PCIe driver

Add ECAM based SynQuacer PCIe RC driver. This driver configures the
PCIe RC and filter out a ghost pcie config.

Since the Linux kernel expects "socionext,synquacer-pcie-ecam" device
is configured by firmware (EDK2), it doesn't re-configure in the kernel.
So as same as EDK2, U-Boot needs to configure it before boot the kernel.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>

1 files changed, 600 insertions, 0 deletions

diff --git a/drivers/pci/pcie_ecam_synquacer.c b/drivers/pci/pcie_ecam_synquacer.c
new file mode 100644
index 00000000000..c6e7c59f8a6
--- /dev/null
+++ b/drivers/pci/pcie_ecam_synquacer.c
@@ -0,0 +1,600 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SynQuacer PCIE host driver
+ *
+ * Based on drivers/pci/pcie_ecam_generic.c
+ *
+ * Copyright (C) 2016 Imagination Technologies
+ * Copyright (C) 2021 Linaro Ltd.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <pci.h>
+#include <log.h>
+
+#include <asm/io.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+
+/* iATU registers */
+#define IATU_VIEWPORT_OFF                                   0x900
+#define IATU_VIEWPORT_INBOUND                               BIT(31)
+#define IATU_VIEWPORT_OUTBOUND                              0
+#define IATU_VIEWPORT_REGION_INDEX(idx)                     ((idx) & 7)
+
+#define IATU_REGION_CTRL_1_OFF_OUTBOUND_0                   0x904
+#define IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_MEM          0x0
+#define IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_IO           0x2
+#define IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG0         0x4
+#define IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG1         0x5
+#define IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TH                BIT(12)
+
+#define IATU_REGION_CTRL_2_OFF_OUTBOUND_0                   0x908
+#define IATU_REGION_CTRL_2_OFF_OUTBOUND_0_REGION_EN         BIT(31)
+#define IATU_REGION_CTRL_2_OFF_OUTBOUND_0_CFG_SHIFT_MODE    BIT(28)
+#define IATU_REGION_CTRL_2_OFF_OUTBOUND_0_MSG_CODE_32BIT    0xF
+#define IATU_REGION_CTRL_2_OFF_OUTBOUND_0_MSG_CODE_64BIT    0xFF
+
+#define IATU_LWR_BASE_ADDR_OFF_OUTBOUND_0                   0x90C
+#define IATU_UPPER_BASE_ADDR_OFF_OUTBOUND_0                 0x910
+#define IATU_LIMIT_ADDR_OFF_OUTBOUND_0                      0x914
+#define IATU_LWR_TARGET_ADDR_OFF_OUTBOUND_0                 0x918
+#define IATU_UPPER_TARGET_ADDR_OFF_OUTBOUND_0               0x91C
+
+/* Clock and resets */
+#define CORE_CONTROL                  0x000
+#define APP_LTSSM_ENABLE              BIT(4)
+#define DEVICE_TYPE                   (BIT(3) | BIT(2) | BIT(1) | BIT(0))
+
+#define AXI_CLK_STOP                  0x004
+#define DBI_ACLK_STOP                 BIT(8)
+#define SLV_ACLK_STOP                 BIT(4)
+#define MSTR_ACLK_STOP                BIT(0)
+#define DBI_CSYSREQ_REG               BIT(9)
+#define SLV_CSYSREQ_REG               BIT(5)
+#define MSTR_CSYSREQ_REG              BIT(1)
+
+#define RESET_CONTROL_1               0x00C
+#define PERST_N_O_REG                 BIT(5)
+#define PERST_N_I_REG                 BIT(4)
+#define BUTTON_RST_N_REG              BIT(1)
+#define PWUP_RST_N_REG                BIT(0)
+
+#define RESET_CONTROL_2               0x010
+
+#define RESET_SELECT_1                0x014
+#define SQU_RST_SEL                   BIT(29)
+#define PHY_RST_SEL                   BIT(28)
+#define PWR_RST_SEL                   BIT(24)
+#define STI_RST_SEL                   BIT(20)
+#define N_STI_RST_SEL                 BIT(16)
+#define CORE_RST_SEL                  BIT(12)
+#define PERST_SEL                     BIT(4)
+#define BUTTON_RST_SEL                BIT(1)
+#define PWUP_RST_SEL                  BIT(0)
+
+#define RESET_SELECT_2                0x018
+#define DBI_ARST_SEL                  BIT(8)
+#define SLV_ARST_SEL                  BIT(4)
+#define MSTR_ARST_SEL                 BIT(0)
+
+#define EM_CONTROL                    0x030
+#define PRE_DET_STT_REG               BIT(4)
+
+#define EM_SELECT                     0x034
+#define PRE_DET_STT_SEL               BIT(4)
+
+#define PM_CONTROL_2                  0x050
+#define SYS_AUX_PWR_DET               BIT(8)
+
+#define PHY_CONFIG_COM_6              0x114
+#define PIPE_PORT_SEL                 GENMASK(1, 0)
+
+#define LINK_MONITOR                  0x210
+#define SMLH_LINK_UP                  BIT(0)
+
+#define LINK_CAPABILITIES_REG         0x07C
+#define PCIE_CAP_MAX_LINK_WIDTH       GENMASK(7, 4)
+#define PCIE_CAP_MAX_LINK_SPEED       GENMASK(3, 0)
+
+#define LINK_CONTROL_LINK_STATUS_REG  0x080
+#define PCIE_CAP_NEGO_LINK_WIDTH      GENMASK(23, 20)
+#define PCIE_CAP_LINK_SPEED           GENMASK(19, 16)
+
+#define TYPE1_CLASS_CODE_REV_ID_REG   0x008
+#define BASE_CLASS_CODE               0xFF000000
+#define BASE_CLASS_CODE_VALUE         0x06
+#define SUBCLASS_CODE                 0x00FF0000
+#define SUBCLASS_CODE_VALUE           0x04
+#define PROGRAM_INTERFACE             0x0000FF00
+#define PROGRAM_INTERFACE_VALUE       0x00
+
+#define GEN2_CONTROL_OFF              0x80c
+#define DIRECT_SPEED_CHANGE           BIT(17)
+
+#define MISC_CONTROL_1_OFF            0x8BC
+#define DBI_RO_WR_EN                  BIT(0)
+
+static void or_writel(void *base, u32 offs, u32 val)
+{
+	writel(readl(base + offs) | val, base + offs);
+}
+
+static void masked_writel(void *base, u32 offs, u32 mask, u32 val)
+{
+	u32 data;
+	int shift = ffs(mask);	/* Note that ffs() returns 1 for 0x1 */
+
+	if (val && shift > 1)
+		val <<= shift - 1;
+
+	if (mask != ~0)
+		data = (readl(base + offs) & ~mask) | val;
+	else
+		data = val;
+
+	writel(data, base + offs);
+}
+
+static u32 masked_readl(void *base, u32 offs, u32 mask)
+{
+	u32 data;
+	int shift = ffs(mask);	/* Note that ffs() returns 1 for 0x1 */
+
+	data = readl(base + offs);
+
+	if (mask != ~0)
+		data &= mask;
+	if (shift > 1)
+		data >>= shift - 1;
+
+	return data;
+}
+
+/*
+ * Since SynQuacer's PCIe RC is expected to be initialized in the
+ * firmware (including U-Boot), devicetree doesn't have control
+ * blocks.
+ *
+ * Thus, this will initialize the PCIe RC with fixed addresses.
+ */
+
+#define SYNQUACER_PCI_SEG0_CONFIG_BASE	0x60000000
+#define SYNQUACER_PCI_SEG0_CONFIG_SIZE	0x07f00000
+#define SYNQUACER_PCI_SEG0_DBI_BASE	0x583d0000
+#define SYNQUACER_PCI_SEG0_EXS_BASE	0x58390000
+
+#define SYNQUACER_PCI_SEG1_CONFIG_BASE	0x70000000
+#define SYNQUACER_PCI_SEG1_CONFIG_SIZE	0x07f00000
+#define SYNQUACER_PCI_SEG1_DBI_BASE	0x583c0000
+#define SYNQUACER_PCI_SEG1_EXS_BASE	0x58380000
+
+#define SIZE_16KB			0x00004000
+#define SIZE_64KB			0x00010000
+#define SIZE_1MB			0x00100000
+
+#define SYNQUACER_PCI_DBI_SIZE		SIZE_16KB
+#define SYNQUACER_PCI_EXS_SIZE		SIZE_64KB
+
+#define NUM_SQ_PCI_RC	2
+
+static const struct synquacer_pcie_base {
+	phys_addr_t cfg_base;
+	phys_addr_t dbi_base;
+	phys_addr_t exs_base;
+} synquacer_pci_bases[NUM_SQ_PCI_RC] = {
+	{
+		.cfg_base = SYNQUACER_PCI_SEG0_CONFIG_BASE,
+		.dbi_base = SYNQUACER_PCI_SEG0_DBI_BASE,
+		.exs_base = SYNQUACER_PCI_SEG0_EXS_BASE,
+	}, {
+		.cfg_base = SYNQUACER_PCI_SEG1_CONFIG_BASE,
+		.dbi_base = SYNQUACER_PCI_SEG1_DBI_BASE,
+		.exs_base = SYNQUACER_PCI_SEG1_EXS_BASE,
+	},
+};
+
+/**
+ * struct synquacer_ecam_pcie - synquacer_ecam PCIe controller state
+ * @cfg_base: The base address of memory mapped configuration space
+ */
+struct synquacer_ecam_pcie {
+	void *cfg_base;
+	pci_size_t size;
+	void *dbi_base;
+	void *exs_base;
+	int first_busno;
+
+	struct pci_region mem;
+	struct pci_region io;
+	struct pci_region mem64;
+};
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/**
+ * pci_synquacer_ecam_conf_address() - Calculate the address of a config access
+ * @bus: Pointer to the PCI bus
+ * @bdf: Identifies the PCIe device to access
+ * @offset: The offset into the device's configuration space
+ * @paddress: Pointer to the pointer to write the calculates address to
+ *
+ * Calculates the address that should be accessed to perform a PCIe
+ * configuration space access for a given device identified by the PCIe
+ * controller device @pcie and the bus, device & function numbers in @bdf. If
+ * access to the device is not valid then the function will return an error
+ * code. Otherwise the address to access will be written to the pointer pointed
+ * to by @paddress.
+ */
+static int pci_synquacer_ecam_conf_address(const struct udevice *bus,
+					   pci_dev_t bdf, uint offset,
+					   void **paddress)
+{
+	struct synquacer_ecam_pcie *pcie = dev_get_priv(bus);
+	void *addr;
+
+	addr = pcie->cfg_base;
+	addr += (PCI_BUS(bdf) - pcie->first_busno) << 20;
+	addr += PCI_DEV(bdf) << 15;
+	addr += PCI_FUNC(bdf) << 12;
+	addr += offset;
+	*paddress = addr;
+
+	return 0;
+}
+
+static bool pci_synquacer_ecam_addr_valid(const struct udevice *bus,
+					  pci_dev_t bdf)
+{
+	struct synquacer_ecam_pcie *pcie = dev_get_priv(bus);
+	int num_buses = DIV_ROUND_UP(pcie->size, 1 << 16);
+
+	/*
+	 * The Synopsys DesignWare PCIe controller in ECAM mode will not filter
+	 * type 0 config TLPs sent to devices 1 and up on its downstream port,
+	 * resulting in devices appearing multiple times on bus 0 unless we
+	 * filter out those accesses here.
+	 */
+	if (PCI_BUS(bdf) == pcie->first_busno && PCI_DEV(bdf) > 0)
+		return false;
+
+	return (PCI_BUS(bdf) >= pcie->first_busno &&
+		PCI_BUS(bdf) < pcie->first_busno + num_buses);
+}
+
+/**
+ * pci_synquacer_ecam_read_config() - Read from configuration space
+ * @bus: Pointer to the PCI bus
+ * @bdf: Identifies the PCIe device to access
+ * @offset: The offset into the device's configuration space
+ * @valuep: A pointer at which to store the read value
+ * @size: Indicates the size of access to perform
+ *
+ * Read a value of size @size from offset @offset within the configuration
+ * space of the device identified by the bus, device & function numbers in @bdf
+ * on the PCI bus @bus.
+ */
+static int pci_synquacer_ecam_read_config(const struct udevice *bus,
+					  pci_dev_t bdf, uint offset,
+					  ulong *valuep, enum pci_size_t size)
+{
+	if (!pci_synquacer_ecam_addr_valid(bus, bdf)) {
+		*valuep = pci_get_ff(size);
+		return 0;
+	}
+
+	return pci_generic_mmap_read_config(bus, pci_synquacer_ecam_conf_address,
+					    bdf, offset, valuep, size);
+}
+
+/**
+ * pci_synquacer_ecam_write_config() - Write to configuration space
+ * @bus: Pointer to the PCI bus
+ * @bdf: Identifies the PCIe device to access
+ * @offset: The offset into the device's configuration space
+ * @value: The value to write
+ * @size: Indicates the size of access to perform
+ *
+ * Write the value @value of size @size from offset @offset within the
+ * configuration space of the device identified by the bus, device & function
+ * numbers in @bdf on the PCI bus @bus.
+ */
+static int pci_synquacer_ecam_write_config(struct udevice *bus, pci_dev_t bdf,
+					   uint offset, ulong value,
+					   enum pci_size_t size)
+{
+	if (!pci_synquacer_ecam_addr_valid(bus, bdf))
+		return 0;
+
+	return pci_generic_mmap_write_config(bus, pci_synquacer_ecam_conf_address,
+					     bdf, offset, value, size);
+}
+
+/**
+ * pci_synquacer_ecam_of_to_plat() - Translate from DT to device state
+ * @dev: A pointer to the device being operated on
+ *
+ * Translate relevant data from the device tree pertaining to device @dev into
+ * state that the driver will later make use of. This state is stored in the
+ * device's private data structure.
+ *
+ * Return: 0 on success, else -EINVAL
+ */
+static int pci_synquacer_ecam_of_to_plat(struct udevice *dev)
+{
+	struct synquacer_ecam_pcie *pcie = dev_get_priv(dev);
+	struct fdt_resource reg_res;
+	int i, err;
+
+	debug("%s: called for %s\n", __func__, dev->name);
+
+	err = fdt_get_resource(gd->fdt_blob, dev_of_offset(dev), "reg",
+			       0, &reg_res);
+	if (err < 0) {
+		pr_err("\"reg\" resource not found\n");
+		return err;
+	}
+
+	/* Find the correct pair of the DBI/EXS base address */
+	for (i = 0; i < NUM_SQ_PCI_RC; i++) {
+		if (synquacer_pci_bases[i].cfg_base == reg_res.start)
+			break;
+	}
+	if (i == NUM_SQ_PCI_RC) {
+		pr_err("Unknown ECAM base address %lx.\n",
+		       (unsigned long)reg_res.start);
+		return -ENOENT;
+	}
+	pcie->dbi_base = map_physmem(synquacer_pci_bases[i].dbi_base,
+				     SYNQUACER_PCI_DBI_SIZE, MAP_NOCACHE);
+	if (!pcie->dbi_base) {
+		pr_err("Failed to map DBI for %s\n", dev->name);
+		return -ENOMEM;
+	}
+
+	pcie->exs_base = map_physmem(synquacer_pci_bases[i].exs_base,
+				     SYNQUACER_PCI_EXS_SIZE, MAP_NOCACHE);
+	if (!pcie->exs_base) {
+		pr_err("Failed to map EXS for %s\n", dev->name);
+		return -ENOMEM;
+	}
+
+	pcie->size = fdt_resource_size(&reg_res);
+	pcie->cfg_base = map_physmem(reg_res.start, pcie->size, MAP_NOCACHE);
+	if (!pcie->cfg_base) {
+		pr_err("Failed to map config space for %s\n", dev->name);
+		return -ENOMEM;
+	}
+	debug("mappings DBI: %p EXS: %p CFG: %p\n", pcie->dbi_base, pcie->exs_base, pcie->cfg_base);
+
+	return 0;
+}
+
+static void pci_synquacer_pre_init(struct synquacer_ecam_pcie *pcie)
+{
+	void *base = pcie->exs_base;
+
+	masked_writel(base, EM_SELECT, PRE_DET_STT_SEL, 0);
+	masked_writel(base, EM_CONTROL, PRE_DET_STT_REG, 0);
+	masked_writel(base, EM_CONTROL, PRE_DET_STT_REG, 1);
+
+	/* 1: Assert all PHY / LINK resets */
+	masked_writel(base, RESET_SELECT_1, PERST_SEL, 0);
+	masked_writel(base, RESET_CONTROL_1, PERST_N_I_REG, 0);
+	masked_writel(base, RESET_CONTROL_1, PERST_N_O_REG, 0);
+
+	/* Device Reset(PERST#) is effective afrer Set device_type (RC) */
+	masked_writel(base, RESET_SELECT_1, PWUP_RST_SEL, 0);
+	masked_writel(base, RESET_CONTROL_1, PWUP_RST_N_REG, 0);
+	masked_writel(base, RESET_SELECT_1, BUTTON_RST_SEL, 0);
+	masked_writel(base, RESET_CONTROL_1, BUTTON_RST_N_REG, 0);
+	masked_writel(base, RESET_SELECT_1, PWR_RST_SEL, 1);
+	masked_writel(base, RESET_SELECT_2, MSTR_ARST_SEL, 1);
+	masked_writel(base, RESET_SELECT_2, SLV_ARST_SEL, 1);
+	masked_writel(base, RESET_SELECT_2, DBI_ARST_SEL, 1);
+	masked_writel(base, RESET_SELECT_1, CORE_RST_SEL, 1);
+	masked_writel(base, RESET_SELECT_1, STI_RST_SEL, 1);
+	masked_writel(base, RESET_SELECT_1, N_STI_RST_SEL, 1);
+	masked_writel(base, RESET_SELECT_1, SQU_RST_SEL, 1);
+	masked_writel(base, RESET_SELECT_1, PHY_RST_SEL, 1);
+
+	/* 2: Set P<n>_app_ltssm_enable='0' for reprogramming before linkup. */
+	masked_writel(base, CORE_CONTROL, APP_LTSSM_ENABLE, 0);
+
+	/* 3: Set device_type (RC) */
+	masked_writel(base, CORE_CONTROL, DEVICE_TYPE, 4);
+}
+
+static void pci_synquacer_dbi_init(void *dbi_base)
+{
+	masked_writel(dbi_base, MISC_CONTROL_1_OFF, DBI_RO_WR_EN, 1);
+	/* 4 Lanes */
+	masked_writel(dbi_base, LINK_CAPABILITIES_REG,
+		      PCIE_CAP_MAX_LINK_WIDTH, 4);
+	/* Gen 2 */
+	masked_writel(dbi_base, LINK_CAPABILITIES_REG,
+		      PCIE_CAP_MAX_LINK_SPEED, 2);
+
+	masked_writel(dbi_base, TYPE1_CLASS_CODE_REV_ID_REG,
+		      BASE_CLASS_CODE, BASE_CLASS_CODE_VALUE);
+	masked_writel(dbi_base, TYPE1_CLASS_CODE_REV_ID_REG,
+		      SUBCLASS_CODE, SUBCLASS_CODE_VALUE);
+	masked_writel(dbi_base, TYPE1_CLASS_CODE_REV_ID_REG,
+		      PROGRAM_INTERFACE, PROGRAM_INTERFACE_VALUE);
+
+	masked_writel(dbi_base, MISC_CONTROL_1_OFF, DBI_RO_WR_EN, 0);
+}
+
+static void pcie_sq_prog_outbound_atu(void *dbi_base, int index,
+				      u64 cpu_base, u64 pci_base, u64 size,
+				      u32 type, u32 flags)
+{
+	debug("%s: %p, %d, %llx, %llx, %llx, %x, %x\n", __func__,
+	      dbi_base, index, cpu_base, pci_base, size, type, flags);
+
+	writel(IATU_VIEWPORT_OUTBOUND | IATU_VIEWPORT_REGION_INDEX(index),
+	       dbi_base + IATU_VIEWPORT_OFF);
+
+	writel((u32)(cpu_base & 0xffffffff),
+	       dbi_base + IATU_LWR_BASE_ADDR_OFF_OUTBOUND_0);
+	writel((u32)(cpu_base >> 32),
+	       dbi_base + IATU_UPPER_BASE_ADDR_OFF_OUTBOUND_0);
+	writel((u32)(cpu_base + size - 1),
+	       dbi_base + IATU_LIMIT_ADDR_OFF_OUTBOUND_0);
+
+	writel((u32)(pci_base & 0xffffffff),
+	       dbi_base + IATU_LWR_TARGET_ADDR_OFF_OUTBOUND_0);
+	writel((u32)(pci_base >> 32),
+	       dbi_base + IATU_UPPER_TARGET_ADDR_OFF_OUTBOUND_0);
+
+	writel(type, dbi_base + IATU_REGION_CTRL_1_OFF_OUTBOUND_0);
+	writel(IATU_REGION_CTRL_2_OFF_OUTBOUND_0_REGION_EN | flags,
+	       dbi_base + IATU_REGION_CTRL_2_OFF_OUTBOUND_0);
+}
+
+static void pci_synquacer_post_init(struct synquacer_ecam_pcie *pcie)
+{
+	void *base = pcie->exs_base;
+
+	/*
+	 * 4: Set Bifurcation  1=disable  4=able
+	 * 5: Supply Reference (It has executed)
+	 * 6: Wait for 10usec (Reference Clocks is stable)
+	 * 7: De assert PERST#
+	 */
+	masked_writel(base, RESET_CONTROL_1, PERST_N_I_REG, 1);
+	masked_writel(base, RESET_CONTROL_1, PERST_N_O_REG, 1);
+
+	/* 8: Assert SYS_AUX_PWR_DET */
+	masked_writel(base, PM_CONTROL_2, SYS_AUX_PWR_DET, 1);
+
+	/* 9: Supply following clocks */
+	masked_writel(base, AXI_CLK_STOP, MSTR_CSYSREQ_REG, 1);
+	masked_writel(base, AXI_CLK_STOP, MSTR_ACLK_STOP, 0);
+	masked_writel(base, AXI_CLK_STOP, SLV_CSYSREQ_REG, 1);
+	masked_writel(base, AXI_CLK_STOP, SLV_ACLK_STOP, 0);
+	masked_writel(base, AXI_CLK_STOP, DBI_CSYSREQ_REG, 1);
+	masked_writel(base, AXI_CLK_STOP, DBI_ACLK_STOP, 0);
+
+	/*
+	 * 10: De assert PHY reset
+	 * 11: De assert LINK's PMC reset
+	 */
+	masked_writel(base, RESET_CONTROL_1, PWUP_RST_N_REG, 1);
+	masked_writel(base, RESET_CONTROL_1, BUTTON_RST_N_REG, 1);
+
+	/* 12: PHY auto
+	 * 13: Wrapper auto
+	 * 14-17: PHY auto
+	 * 18: Wrapper auto
+	 * 19: Update registers through DBI AXI Slave interface
+	 */
+	pci_synquacer_dbi_init(pcie->dbi_base);
+
+	or_writel(pcie->dbi_base, PCI_COMMAND,
+		  PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+	/* Force link speed change to Gen2 at link up */
+	or_writel(pcie->dbi_base, GEN2_CONTROL_OFF, DIRECT_SPEED_CHANGE);
+
+	/* Region 0: MMIO32 range */
+	pcie_sq_prog_outbound_atu(pcie->dbi_base, 0,
+				  pcie->mem.phys_start,
+				  pcie->mem.bus_start,
+				  pcie->mem.size,
+				  IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_MEM |
+				  IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TH,
+				  IATU_REGION_CTRL_2_OFF_OUTBOUND_0_MSG_CODE_32BIT);
+
+	/* Region 1: Type 0 config space */
+	pcie_sq_prog_outbound_atu(pcie->dbi_base, 1,
+				  (u64)pcie->cfg_base,
+				  0,
+				  SIZE_64KB,
+				  IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG0,
+				  IATU_REGION_CTRL_2_OFF_OUTBOUND_0_CFG_SHIFT_MODE);
+
+	/* Region 2: Type 1 config space */
+	pcie_sq_prog_outbound_atu(pcie->dbi_base, 2,
+				  (u64)pcie->cfg_base + SIZE_64KB,
+				  0,
+				  (u64)pcie->io.phys_start  - (u64)pcie->cfg_base - SIZE_64KB,
+				  IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG1,
+				  IATU_REGION_CTRL_2_OFF_OUTBOUND_0_CFG_SHIFT_MODE);
+
+	/* Region 3: port I/O range */
+	pcie_sq_prog_outbound_atu(pcie->dbi_base, 3,
+				  pcie->io.phys_start,
+				  pcie->io.bus_start,
+				  pcie->io.size,
+				  IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_IO,
+				  0);
+
+	/* Region 4: MMIO64 range */
+	pcie_sq_prog_outbound_atu(pcie->dbi_base, 4,
+				  pcie->mem64.phys_start,
+				  pcie->mem64.bus_start,
+				  pcie->mem64.size,
+				  IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_MEM |
+				  IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TH,
+				  IATU_REGION_CTRL_2_OFF_OUTBOUND_0_MSG_CODE_32BIT);
+
+	/* enable link */
+	if (masked_readl(base, CORE_CONTROL, APP_LTSSM_ENABLE) == 0)
+		masked_writel(base, CORE_CONTROL, APP_LTSSM_ENABLE, 1);
+}
+
+static int pci_synquacer_ecam_probe(struct udevice *dev)
+{
+	struct synquacer_ecam_pcie *pcie = dev_get_priv(dev);
+	struct udevice *ctlr = pci_get_controller(dev);
+	struct pci_controller *hose = dev_get_uclass_priv(ctlr);
+
+	debug("Probe synquacer pcie for bus %d\n", dev_seq(dev));
+	pcie->first_busno = dev_seq(dev);
+
+	/* Store the IO and MEM windows settings for configuring ATU */
+	pcie->io.phys_start = hose->regions[0].phys_start; /* IO base */
+	pcie->io.bus_start  = hose->regions[0].bus_start;  /* IO_bus_addr */
+	pcie->io.size	    = hose->regions[0].size;	   /* IO size */
+
+	pcie->mem.phys_start = hose->regions[1].phys_start; /* MEM base */
+	pcie->mem.bus_start  = hose->regions[1].bus_start;  /* MEM_bus_addr */
+	pcie->mem.size	     = hose->regions[1].size;	    /* MEM size */
+
+	pcie->mem64.phys_start = hose->regions[2].phys_start; /* MEM64 base */
+	pcie->mem64.bus_start  = hose->regions[2].bus_start;  /* MEM64_bus_addr */
+	pcie->mem64.size       = hose->regions[2].size;	    /* MEM64 size */
+
+	pci_synquacer_pre_init(pcie);
+
+	mdelay(150);
+
+	pci_synquacer_post_init(pcie);
+
+	/* It takes a while to stabilize the PCIe bus for scanning */
+	mdelay(100);
+
+	return 0;
+}
+
+static const struct dm_pci_ops pci_synquacer_ecam_ops = {
+	.read_config	= pci_synquacer_ecam_read_config,
+	.write_config	= pci_synquacer_ecam_write_config,
+};
+
+static const struct udevice_id pci_synquacer_ecam_ids[] = {
+	{ .compatible = "socionext,synquacer-pcie-ecam" },
+	{ }
+};
+
+U_BOOT_DRIVER(pci_synquacer_ecam) = {
+	.name			= "pci_synquacer_ecam",
+	.id			= UCLASS_PCI,
+	.of_match		= pci_synquacer_ecam_ids,
+	.ops			= &pci_synquacer_ecam_ops,
+	.probe			= pci_synquacer_ecam_probe,
+	.of_to_plat		= pci_synquacer_ecam_of_to_plat,
+	.priv_auto		= sizeof(struct synquacer_ecam_pcie),
+};