[PATCH v3 06/14] pci: synquacer: Add SynQuacer ECAM based PCIe driver

Masami Hiramatsu
2021-05-10T06:31:58Z

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>
---
drivers/pci/Kconfig | 12 +
drivers/pci/Makefile | 1
drivers/pci/pcie_ecam_synquacer.c | 600 +++++++++++++++++++++++++++++++++++++
3 files changed, 613 insertions(+)
create mode 100644 drivers/pci/pcie_ecam_synquacer.c

diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index d5b6018b3d..2e6393f25b 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -81,6 +81,18 @@ config PCIE_ECAM_GENERIC
Say Y here if you want to enable support for generic ECAM-based
PCIe host controllers, such as the one emulated by QEMU.

+config PCIE_ECAM_SYNQUACER
+ bool "SynQuacer ECAM-based PCI host controller support"
+ default n
+ depends on DM_PCI
+ select PCI_INIT_R
+ select PCI_REGION_MULTI_ENTRY
+ help
+ Say Y here if you want to enable support for Socionext
+ SynQuacer SoC's ECAM-based PCIe host controllers.
+ Note that this must be configured when boot because Linux driver
+ expects the PCIe RC has been configured in the bootloader.
+
config PCI_PHYTIUM
bool "Phytium PCIe support"
depends on DM_PCI
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 1f741786a0..035e3d3088 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -16,6 +16,7 @@ endif
obj-$(CONFIG_PCI) += pci_auto_common.o pci_common.o

obj-$(CONFIG_PCIE_ECAM_GENERIC) += pcie_ecam_generic.o
+obj-$(CONFIG_PCIE_ECAM_SYNQUACER) += pcie_ecam_synquacer.o
obj-$(CONFIG_FSL_PCI_INIT) += fsl_pci_init.o
obj-$(CONFIG_PCI_INDIRECT_BRIDGE) += pci_indirect.o
obj-$(CONFIG_PCI_GT64120) += pci_gt64120.o
diff --git a/drivers/pci/pcie_ecam_synquacer.c b/drivers/pci/pcie_ecam_synquacer.c
new file mode 100644
index 0000000000..c6e7c59f8a
--- /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),
+};