|
@@ -0,0 +1,725 @@
|
|
|
+// SPDX-License-Identifier: GPL-2.0+
|
|
|
+/*
|
|
|
+ * Copyright (C) 2018 Texas Instruments, Inc
|
|
|
+ */
|
|
|
+
|
|
|
+#include <common.h>
|
|
|
+#include <dm.h>
|
|
|
+#include <pci.h>
|
|
|
+#include <generic-phy.h>
|
|
|
+#include <power-domain.h>
|
|
|
+#include <regmap.h>
|
|
|
+#include <syscon.h>
|
|
|
+#include <asm/io.h>
|
|
|
+#include <asm-generic/gpio.h>
|
|
|
+
|
|
|
+DECLARE_GLOBAL_DATA_PTR;
|
|
|
+
|
|
|
+#define PCIE_VENDORID_MASK GENMASK(15, 0)
|
|
|
+#define PCIE_DEVICEID_SHIFT 16
|
|
|
+
|
|
|
+/* PCI DBICS registers */
|
|
|
+#define PCIE_CONFIG_BAR0 0x10
|
|
|
+#define PCIE_LINK_STATUS_REG 0x80
|
|
|
+#define PCIE_LINK_STATUS_SPEED_OFF 16
|
|
|
+#define PCIE_LINK_STATUS_SPEED_MASK (0xf << PCIE_LINK_STATUS_SPEED_OFF)
|
|
|
+#define PCIE_LINK_STATUS_WIDTH_OFF 20
|
|
|
+#define PCIE_LINK_STATUS_WIDTH_MASK (0xf << PCIE_LINK_STATUS_WIDTH_OFF)
|
|
|
+
|
|
|
+#define PCIE_LINK_CAPABILITY 0x7c
|
|
|
+#define PCIE_LINK_CTL_2 0xa0
|
|
|
+#define TARGET_LINK_SPEED_MASK 0xf
|
|
|
+#define LINK_SPEED_GEN_1 0x1
|
|
|
+#define LINK_SPEED_GEN_2 0x2
|
|
|
+#define LINK_SPEED_GEN_3 0x3
|
|
|
+
|
|
|
+#define PCIE_MISC_CONTROL_1_OFF 0x8bc
|
|
|
+#define PCIE_DBI_RO_WR_EN BIT(0)
|
|
|
+
|
|
|
+#define PLR_OFFSET 0x700
|
|
|
+#define PCIE_PORT_DEBUG0 (PLR_OFFSET + 0x28)
|
|
|
+#define PORT_LOGIC_LTSSM_STATE_MASK 0x1f
|
|
|
+#define PORT_LOGIC_LTSSM_STATE_L0 0x11
|
|
|
+
|
|
|
+#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80c
|
|
|
+#define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
|
|
|
+
|
|
|
+#define PCIE_LINK_UP_TIMEOUT_MS 100
|
|
|
+
|
|
|
+/*
|
|
|
+ * iATU Unroll-specific register definitions
|
|
|
+ * From 4.80 core version the address translation will be made by unroll.
|
|
|
+ * The registers are offset from atu_base
|
|
|
+ */
|
|
|
+#define PCIE_ATU_UNR_REGION_CTRL1 0x00
|
|
|
+#define PCIE_ATU_UNR_REGION_CTRL2 0x04
|
|
|
+#define PCIE_ATU_UNR_LOWER_BASE 0x08
|
|
|
+#define PCIE_ATU_UNR_UPPER_BASE 0x0c
|
|
|
+#define PCIE_ATU_UNR_LIMIT 0x10
|
|
|
+#define PCIE_ATU_UNR_LOWER_TARGET 0x14
|
|
|
+#define PCIE_ATU_UNR_UPPER_TARGET 0x18
|
|
|
+
|
|
|
+#define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
|
|
|
+#define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
|
|
|
+#define PCIE_ATU_TYPE_MEM (0x0 << 0)
|
|
|
+#define PCIE_ATU_TYPE_IO (0x2 << 0)
|
|
|
+#define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
|
|
|
+#define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
|
|
|
+#define PCIE_ATU_ENABLE (0x1 << 31)
|
|
|
+#define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
|
|
|
+#define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
|
|
|
+#define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
|
|
|
+#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
|
|
|
+
|
|
|
+/* Register address builder */
|
|
|
+#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) ((region) << 9)
|
|
|
+
|
|
|
+/* Offsets from App base */
|
|
|
+#define PCIE_CMD_STATUS 0x04
|
|
|
+#define LTSSM_EN_VAL BIT(0)
|
|
|
+
|
|
|
+/* Parameters for the waiting for iATU enabled routine */
|
|
|
+#define LINK_WAIT_MAX_IATU_RETRIES 5
|
|
|
+#define LINK_WAIT_IATU 10000
|
|
|
+
|
|
|
+#define AM654_PCIE_DEV_TYPE_MASK 0x3
|
|
|
+#define EP 0x0
|
|
|
+#define LEG_EP 0x1
|
|
|
+#define RC 0x2
|
|
|
+
|
|
|
+/**
|
|
|
+ * struct pcie_dw_ti - TI DW PCIe controller state
|
|
|
+ *
|
|
|
+ * @app_base: The base address of application register space
|
|
|
+ * @dbics_base: The base address of dbics register space
|
|
|
+ * @cfg_base: The base address of configuration space
|
|
|
+ * @atu_base: The base address of ATU space
|
|
|
+ * @cfg_size: The size of the configuration space which is needed
|
|
|
+ * as it gets written into the PCIE_ATU_LIMIT register
|
|
|
+ * @first_busno: This driver supports multiple PCIe controllers.
|
|
|
+ * first_busno stores the bus number of the PCIe root-port
|
|
|
+ * number which may vary depending on the PCIe setup
|
|
|
+ * (PEX switches etc).
|
|
|
+ */
|
|
|
+struct pcie_dw_ti {
|
|
|
+ void *app_base;
|
|
|
+ void *dbi_base;
|
|
|
+ void *cfg_base;
|
|
|
+ void *atu_base;
|
|
|
+ fdt_size_t cfg_size;
|
|
|
+ int first_busno;
|
|
|
+ struct udevice *dev;
|
|
|
+
|
|
|
+ /* IO and MEM PCI regions */
|
|
|
+ struct pci_region io;
|
|
|
+ struct pci_region mem;
|
|
|
+};
|
|
|
+
|
|
|
+enum dw_pcie_device_mode {
|
|
|
+ DW_PCIE_UNKNOWN_TYPE,
|
|
|
+ DW_PCIE_EP_TYPE,
|
|
|
+ DW_PCIE_LEG_EP_TYPE,
|
|
|
+ DW_PCIE_RC_TYPE,
|
|
|
+};
|
|
|
+
|
|
|
+static int pcie_dw_get_link_speed(struct pcie_dw_ti *pci)
|
|
|
+{
|
|
|
+ return (readl(pci->dbi_base + PCIE_LINK_STATUS_REG) &
|
|
|
+ PCIE_LINK_STATUS_SPEED_MASK) >> PCIE_LINK_STATUS_SPEED_OFF;
|
|
|
+}
|
|
|
+
|
|
|
+static int pcie_dw_get_link_width(struct pcie_dw_ti *pci)
|
|
|
+{
|
|
|
+ return (readl(pci->dbi_base + PCIE_LINK_STATUS_REG) &
|
|
|
+ PCIE_LINK_STATUS_WIDTH_MASK) >> PCIE_LINK_STATUS_WIDTH_OFF;
|
|
|
+}
|
|
|
+
|
|
|
+static void dw_pcie_writel_ob_unroll(struct pcie_dw_ti *pci, u32 index, u32 reg,
|
|
|
+ u32 val)
|
|
|
+{
|
|
|
+ u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
|
|
|
+ void __iomem *base = pci->atu_base;
|
|
|
+
|
|
|
+ writel(val, base + offset + reg);
|
|
|
+}
|
|
|
+
|
|
|
+static u32 dw_pcie_readl_ob_unroll(struct pcie_dw_ti *pci, u32 index, u32 reg)
|
|
|
+{
|
|
|
+ u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
|
|
|
+ void __iomem *base = pci->atu_base;
|
|
|
+
|
|
|
+ return readl(base + offset + reg);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_prog_outbound_atu_unroll() - Configure ATU for outbound accesses
|
|
|
+ *
|
|
|
+ * @pcie: Pointer to the PCI controller state
|
|
|
+ * @index: ATU region index
|
|
|
+ * @type: ATU accsess type
|
|
|
+ * @cpu_addr: the physical address for the translation entry
|
|
|
+ * @pci_addr: the pcie bus address for the translation entry
|
|
|
+ * @size: the size of the translation entry
|
|
|
+ */
|
|
|
+static void pcie_dw_prog_outbound_atu_unroll(struct pcie_dw_ti *pci, int index,
|
|
|
+ int type, u64 cpu_addr,
|
|
|
+ u64 pci_addr, u32 size)
|
|
|
+{
|
|
|
+ u32 retries, val;
|
|
|
+
|
|
|
+ debug("ATU programmed with: index: %d, type: %d, cpu addr: %8llx, pci addr: %8llx, size: %8x\n",
|
|
|
+ index, type, cpu_addr, pci_addr, size);
|
|
|
+
|
|
|
+ dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_BASE,
|
|
|
+ lower_32_bits(cpu_addr));
|
|
|
+ dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_BASE,
|
|
|
+ upper_32_bits(cpu_addr));
|
|
|
+ dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LIMIT,
|
|
|
+ lower_32_bits(cpu_addr + size - 1));
|
|
|
+ dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET,
|
|
|
+ lower_32_bits(pci_addr));
|
|
|
+ dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET,
|
|
|
+ upper_32_bits(pci_addr));
|
|
|
+ dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1,
|
|
|
+ type);
|
|
|
+ dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2,
|
|
|
+ PCIE_ATU_ENABLE);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Make sure ATU enable takes effect before any subsequent config
|
|
|
+ * and I/O accesses.
|
|
|
+ */
|
|
|
+ for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) {
|
|
|
+ val = dw_pcie_readl_ob_unroll(pci, index,
|
|
|
+ PCIE_ATU_UNR_REGION_CTRL2);
|
|
|
+ if (val & PCIE_ATU_ENABLE)
|
|
|
+ return;
|
|
|
+
|
|
|
+ udelay(LINK_WAIT_IATU);
|
|
|
+ }
|
|
|
+ dev_err(pci->dev, "outbound iATU is not being enabled\n");
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * set_cfg_address() - Configure the PCIe controller config space access
|
|
|
+ *
|
|
|
+ * @pcie: Pointer to the PCI controller state
|
|
|
+ * @d: PCI device to access
|
|
|
+ * @where: Offset in the configuration space
|
|
|
+ *
|
|
|
+ * Configures the PCIe controller to access the configuration space of
|
|
|
+ * a specific PCIe device and returns the address to use for this
|
|
|
+ * access.
|
|
|
+ *
|
|
|
+ * Return: Address that can be used to access the configation space
|
|
|
+ * of the requested device / offset
|
|
|
+ */
|
|
|
+static uintptr_t set_cfg_address(struct pcie_dw_ti *pcie,
|
|
|
+ pci_dev_t d, uint where)
|
|
|
+{
|
|
|
+ int bus = PCI_BUS(d) - pcie->first_busno;
|
|
|
+ uintptr_t va_address;
|
|
|
+ u32 atu_type;
|
|
|
+
|
|
|
+ /* Use dbi_base for own configuration read and write */
|
|
|
+ if (!bus) {
|
|
|
+ va_address = (uintptr_t)pcie->dbi_base;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (bus == 1)
|
|
|
+ /* For local bus, change TLP Type field to 4. */
|
|
|
+ atu_type = PCIE_ATU_TYPE_CFG0;
|
|
|
+ else
|
|
|
+ /* Otherwise, change TLP Type field to 5. */
|
|
|
+ atu_type = PCIE_ATU_TYPE_CFG1;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Not accessing root port configuration space?
|
|
|
+ * Region #0 is used for Outbound CFG space access.
|
|
|
+ * Direction = Outbound
|
|
|
+ * Region Index = 0
|
|
|
+ */
|
|
|
+ d = PCI_MASK_BUS(d);
|
|
|
+ d = PCI_ADD_BUS(bus, d);
|
|
|
+ pcie_dw_prog_outbound_atu_unroll(pcie, PCIE_ATU_REGION_INDEX1,
|
|
|
+ atu_type, (u64)pcie->cfg_base,
|
|
|
+ d << 8, pcie->cfg_size);
|
|
|
+
|
|
|
+ va_address = (uintptr_t)pcie->cfg_base;
|
|
|
+
|
|
|
+out:
|
|
|
+ va_address += where & ~0x3;
|
|
|
+
|
|
|
+ return va_address;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_addr_valid() - Check for valid bus address
|
|
|
+ *
|
|
|
+ * @d: The PCI device to access
|
|
|
+ * @first_busno: Bus number of the PCIe controller root complex
|
|
|
+ *
|
|
|
+ * Return 1 (true) if the PCI device can be accessed by this controller.
|
|
|
+ *
|
|
|
+ * Return: 1 on valid, 0 on invalid
|
|
|
+ */
|
|
|
+static int pcie_dw_addr_valid(pci_dev_t d, int first_busno)
|
|
|
+{
|
|
|
+ if ((PCI_BUS(d) == first_busno) && (PCI_DEV(d) > 0))
|
|
|
+ return 0;
|
|
|
+ if ((PCI_BUS(d) == first_busno + 1) && (PCI_DEV(d) > 0))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_ti_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.
|
|
|
+ *
|
|
|
+ * Return: 0 on success
|
|
|
+ */
|
|
|
+static int pcie_dw_ti_read_config(struct udevice *bus, pci_dev_t bdf,
|
|
|
+ uint offset, ulong *valuep,
|
|
|
+ enum pci_size_t size)
|
|
|
+{
|
|
|
+ struct pcie_dw_ti *pcie = dev_get_priv(bus);
|
|
|
+ uintptr_t va_address;
|
|
|
+ ulong value;
|
|
|
+
|
|
|
+ debug("PCIE CFG read: bdf=%2x:%2x:%2x ",
|
|
|
+ PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
|
|
|
+
|
|
|
+ if (!pcie_dw_addr_valid(bdf, pcie->first_busno)) {
|
|
|
+ debug("- out of range\n");
|
|
|
+ *valuep = pci_get_ff(size);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ va_address = set_cfg_address(pcie, bdf, offset);
|
|
|
+
|
|
|
+ value = readl(va_address);
|
|
|
+
|
|
|
+ debug("(addr,val)=(0x%04x, 0x%08lx)\n", offset, value);
|
|
|
+ *valuep = pci_conv_32_to_size(value, offset, size);
|
|
|
+
|
|
|
+ pcie_dw_prog_outbound_atu_unroll(pcie, PCIE_ATU_REGION_INDEX1,
|
|
|
+ PCIE_ATU_TYPE_IO, pcie->io.phys_start,
|
|
|
+ pcie->io.bus_start, pcie->io.size);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_ti_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.
|
|
|
+ *
|
|
|
+ * Return: 0 on success
|
|
|
+ */
|
|
|
+static int pcie_dw_ti_write_config(struct udevice *bus, pci_dev_t bdf,
|
|
|
+ uint offset, ulong value,
|
|
|
+ enum pci_size_t size)
|
|
|
+{
|
|
|
+ struct pcie_dw_ti *pcie = dev_get_priv(bus);
|
|
|
+ uintptr_t va_address;
|
|
|
+ ulong old;
|
|
|
+
|
|
|
+ debug("PCIE CFG write: (b,d,f)=(%2d,%2d,%2d) ",
|
|
|
+ PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
|
|
|
+ debug("(addr,val)=(0x%04x, 0x%08lx)\n", offset, value);
|
|
|
+
|
|
|
+ if (!pcie_dw_addr_valid(bdf, pcie->first_busno)) {
|
|
|
+ debug("- out of range\n");
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ va_address = set_cfg_address(pcie, bdf, offset);
|
|
|
+
|
|
|
+ old = readl(va_address);
|
|
|
+ value = pci_conv_size_to_32(old, value, offset, size);
|
|
|
+ writel(value, va_address);
|
|
|
+
|
|
|
+ pcie_dw_prog_outbound_atu_unroll(pcie, PCIE_ATU_REGION_INDEX1,
|
|
|
+ PCIE_ATU_TYPE_IO, pcie->io.phys_start,
|
|
|
+ pcie->io.bus_start, pcie->io.size);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static inline void dw_pcie_dbi_write_enable(struct pcie_dw_ti *pci, bool en)
|
|
|
+{
|
|
|
+ u32 val;
|
|
|
+
|
|
|
+ val = readl(pci->dbi_base + PCIE_MISC_CONTROL_1_OFF);
|
|
|
+ if (en)
|
|
|
+ val |= PCIE_DBI_RO_WR_EN;
|
|
|
+ else
|
|
|
+ val &= ~PCIE_DBI_RO_WR_EN;
|
|
|
+ writel(val, pci->dbi_base + PCIE_MISC_CONTROL_1_OFF);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_configure() - Configure link capabilities and speed
|
|
|
+ *
|
|
|
+ * @regs_base: A pointer to the PCIe controller registers
|
|
|
+ * @cap_speed: The capabilities and speed to configure
|
|
|
+ *
|
|
|
+ * Configure the link capabilities and speed in the PCIe root complex.
|
|
|
+ */
|
|
|
+static void pcie_dw_configure(struct pcie_dw_ti *pci, u32 cap_speed)
|
|
|
+{
|
|
|
+ u32 val;
|
|
|
+
|
|
|
+ dw_pcie_dbi_write_enable(pci, true);
|
|
|
+
|
|
|
+ val = readl(pci->dbi_base + PCIE_LINK_CAPABILITY);
|
|
|
+ val &= ~TARGET_LINK_SPEED_MASK;
|
|
|
+ val |= cap_speed;
|
|
|
+ writel(val, pci->dbi_base + PCIE_LINK_CAPABILITY);
|
|
|
+
|
|
|
+ val = readl(pci->dbi_base + PCIE_LINK_CTL_2);
|
|
|
+ val &= ~TARGET_LINK_SPEED_MASK;
|
|
|
+ val |= cap_speed;
|
|
|
+ writel(val, pci->dbi_base + PCIE_LINK_CTL_2);
|
|
|
+
|
|
|
+ dw_pcie_dbi_write_enable(pci, false);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * is_link_up() - Return the link state
|
|
|
+ *
|
|
|
+ * @regs_base: A pointer to the PCIe DBICS registers
|
|
|
+ *
|
|
|
+ * Return: 1 (true) for active line and 0 (false) for no link
|
|
|
+ */
|
|
|
+static int is_link_up(struct pcie_dw_ti *pci)
|
|
|
+{
|
|
|
+ u32 val;
|
|
|
+
|
|
|
+ val = readl(pci->dbi_base + PCIE_PORT_DEBUG0);
|
|
|
+ val &= PORT_LOGIC_LTSSM_STATE_MASK;
|
|
|
+
|
|
|
+ return (val == PORT_LOGIC_LTSSM_STATE_L0);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * wait_link_up() - Wait for the link to come up
|
|
|
+ *
|
|
|
+ * @regs_base: A pointer to the PCIe controller registers
|
|
|
+ *
|
|
|
+ * Return: 1 (true) for active line and 0 (false) for no link (timeout)
|
|
|
+ */
|
|
|
+static int wait_link_up(struct pcie_dw_ti *pci)
|
|
|
+{
|
|
|
+ unsigned long timeout;
|
|
|
+
|
|
|
+ timeout = get_timer(0) + PCIE_LINK_UP_TIMEOUT_MS;
|
|
|
+ while (!is_link_up(pci)) {
|
|
|
+ if (get_timer(0) > timeout)
|
|
|
+ return 0;
|
|
|
+ };
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+static int pcie_dw_ti_pcie_link_up(struct pcie_dw_ti *pci, u32 cap_speed)
|
|
|
+{
|
|
|
+ u32 val;
|
|
|
+
|
|
|
+ if (is_link_up(pci)) {
|
|
|
+ printf("PCI Link already up before configuration!\n");
|
|
|
+ return 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* DW pre link configurations */
|
|
|
+ pcie_dw_configure(pci, cap_speed);
|
|
|
+
|
|
|
+ /* Initiate link training */
|
|
|
+ val = readl(pci->app_base + PCIE_CMD_STATUS);
|
|
|
+ val |= LTSSM_EN_VAL;
|
|
|
+ writel(val, pci->app_base + PCIE_CMD_STATUS);
|
|
|
+
|
|
|
+ /* Check that link was established */
|
|
|
+ if (!wait_link_up(pci))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Link can be established in Gen 1. still need to wait
|
|
|
+ * till MAC nagaotiation is completed
|
|
|
+ */
|
|
|
+ udelay(100);
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_setup_host() - Setup the PCIe controller for RC opertaion
|
|
|
+ *
|
|
|
+ * @pcie: Pointer to the PCI controller state
|
|
|
+ *
|
|
|
+ * Configure the host BARs of the PCIe controller root port so that
|
|
|
+ * PCI(e) devices may access the system memory.
|
|
|
+ */
|
|
|
+static void pcie_dw_setup_host(struct pcie_dw_ti *pci)
|
|
|
+{
|
|
|
+ u32 val;
|
|
|
+
|
|
|
+ /* setup RC BARs */
|
|
|
+ writel(PCI_BASE_ADDRESS_MEM_TYPE_64,
|
|
|
+ pci->dbi_base + PCI_BASE_ADDRESS_0);
|
|
|
+ writel(0x0, pci->dbi_base + PCI_BASE_ADDRESS_1);
|
|
|
+
|
|
|
+ /* setup interrupt pins */
|
|
|
+ dw_pcie_dbi_write_enable(pci, true);
|
|
|
+ val = readl(pci->dbi_base + PCI_INTERRUPT_LINE);
|
|
|
+ val &= 0xffff00ff;
|
|
|
+ val |= 0x00000100;
|
|
|
+ writel(val, pci->dbi_base + PCI_INTERRUPT_LINE);
|
|
|
+ dw_pcie_dbi_write_enable(pci, false);
|
|
|
+
|
|
|
+ /* setup bus numbers */
|
|
|
+ val = readl(pci->dbi_base + PCI_PRIMARY_BUS);
|
|
|
+ val &= 0xff000000;
|
|
|
+ val |= 0x00ff0100;
|
|
|
+ writel(val, pci->dbi_base + PCI_PRIMARY_BUS);
|
|
|
+
|
|
|
+ /* setup command register */
|
|
|
+ val = readl(pci->dbi_base + PCI_COMMAND);
|
|
|
+ val &= 0xffff0000;
|
|
|
+ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
|
|
|
+ PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
|
|
|
+ writel(val, pci->dbi_base + PCI_COMMAND);
|
|
|
+
|
|
|
+ /* Enable write permission for the DBI read-only register */
|
|
|
+ dw_pcie_dbi_write_enable(pci, true);
|
|
|
+ /* program correct class for RC */
|
|
|
+ writew(PCI_CLASS_BRIDGE_PCI, pci->dbi_base + PCI_CLASS_DEVICE);
|
|
|
+ /* Better disable write permission right after the update */
|
|
|
+ dw_pcie_dbi_write_enable(pci, false);
|
|
|
+
|
|
|
+ val = readl(pci->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
|
|
|
+ val |= PORT_LOGIC_SPEED_CHANGE;
|
|
|
+ writel(val, pci->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
|
|
|
+}
|
|
|
+
|
|
|
+static int pcie_am654_set_mode(struct pcie_dw_ti *pci,
|
|
|
+ enum dw_pcie_device_mode mode)
|
|
|
+{
|
|
|
+ struct regmap *syscon;
|
|
|
+ u32 val;
|
|
|
+ u32 mask;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ syscon = syscon_regmap_lookup_by_phandle(pci->dev,
|
|
|
+ "ti,syscon-pcie-mode");
|
|
|
+ if (IS_ERR(syscon))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ mask = AM654_PCIE_DEV_TYPE_MASK;
|
|
|
+
|
|
|
+ switch (mode) {
|
|
|
+ case DW_PCIE_RC_TYPE:
|
|
|
+ val = RC;
|
|
|
+ break;
|
|
|
+ case DW_PCIE_EP_TYPE:
|
|
|
+ val = EP;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ dev_err(pci->dev, "INVALID device type %d\n", mode);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = regmap_update_bits(syscon, 0, mask, val);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(pci->dev, "failed to set pcie mode\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int pcie_dw_init_id(struct pcie_dw_ti *pci)
|
|
|
+{
|
|
|
+ struct regmap *devctrl_regs;
|
|
|
+ unsigned int id;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ devctrl_regs = syscon_regmap_lookup_by_phandle(pci->dev,
|
|
|
+ "ti,syscon-pcie-id");
|
|
|
+ if (IS_ERR(devctrl_regs))
|
|
|
+ return PTR_ERR(devctrl_regs);
|
|
|
+
|
|
|
+ ret = regmap_read(devctrl_regs, 0, &id);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ dw_pcie_dbi_write_enable(pci, true);
|
|
|
+ writew(id & PCIE_VENDORID_MASK, pci->dbi_base + PCI_VENDOR_ID);
|
|
|
+ writew(id >> PCIE_DEVICEID_SHIFT, pci->dbi_base + PCI_DEVICE_ID);
|
|
|
+ dw_pcie_dbi_write_enable(pci, false);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_ti_probe() - Probe the PCIe bus for active link
|
|
|
+ *
|
|
|
+ * @dev: A pointer to the device being operated on
|
|
|
+ *
|
|
|
+ * Probe for an active link on the PCIe bus and configure the controller
|
|
|
+ * to enable this port.
|
|
|
+ *
|
|
|
+ * Return: 0 on success, else -ENODEV
|
|
|
+ */
|
|
|
+static int pcie_dw_ti_probe(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct pcie_dw_ti *pci = dev_get_priv(dev);
|
|
|
+ struct udevice *ctlr = pci_get_controller(dev);
|
|
|
+ struct pci_controller *hose = dev_get_uclass_priv(ctlr);
|
|
|
+ struct power_domain pci_pwrdmn;
|
|
|
+ struct phy phy0, phy1;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ ret = power_domain_get_by_index(dev, &pci_pwrdmn, 0);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "failed to get power domain\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = power_domain_on(&pci_pwrdmn);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "Power domain on failed\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = generic_phy_get_by_name(dev, "pcie-phy0", &phy0);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "Unable to get phy0");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ generic_phy_reset(&phy0);
|
|
|
+ generic_phy_init(&phy0);
|
|
|
+ generic_phy_power_on(&phy0);
|
|
|
+
|
|
|
+ ret = generic_phy_get_by_name(dev, "pcie-phy1", &phy1);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "Unable to get phy1");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ generic_phy_reset(&phy1);
|
|
|
+ generic_phy_init(&phy1);
|
|
|
+ generic_phy_power_on(&phy1);
|
|
|
+
|
|
|
+ pci->first_busno = dev->seq;
|
|
|
+ pci->dev = dev;
|
|
|
+
|
|
|
+ pcie_dw_setup_host(pci);
|
|
|
+ pcie_dw_init_id(pci);
|
|
|
+
|
|
|
+ if (device_is_compatible(dev, "ti,am654-pcie-rc"))
|
|
|
+ pcie_am654_set_mode(pci, DW_PCIE_RC_TYPE);
|
|
|
+
|
|
|
+ if (!pcie_dw_ti_pcie_link_up(pci, LINK_SPEED_GEN_2)) {
|
|
|
+ printf("PCIE-%d: Link down\n", dev->seq);
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+ printf("PCIE-%d: Link up (Gen%d-x%d, Bus%d)\n", dev->seq,
|
|
|
+ pcie_dw_get_link_speed(pci),
|
|
|
+ pcie_dw_get_link_width(pci),
|
|
|
+ hose->first_busno);
|
|
|
+
|
|
|
+ /* Store the IO and MEM windows settings for future use by the ATU */
|
|
|
+ pci->io.phys_start = hose->regions[0].phys_start; /* IO base */
|
|
|
+ pci->io.bus_start = hose->regions[0].bus_start; /* IO_bus_addr */
|
|
|
+ pci->io.size = hose->regions[0].size; /* IO size */
|
|
|
+
|
|
|
+ pci->mem.phys_start = hose->regions[1].phys_start; /* MEM base */
|
|
|
+ pci->mem.bus_start = hose->regions[1].bus_start; /* MEM_bus_addr */
|
|
|
+ pci->mem.size = hose->regions[1].size; /* MEM size */
|
|
|
+
|
|
|
+ pcie_dw_prog_outbound_atu_unroll(pci, PCIE_ATU_REGION_INDEX0,
|
|
|
+ PCIE_ATU_TYPE_MEM,
|
|
|
+ pci->mem.phys_start,
|
|
|
+ pci->mem.bus_start, pci->mem.size);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * pcie_dw_ti_ofdata_to_platdata() - 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 pcie_dw_ti_ofdata_to_platdata(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct pcie_dw_ti *pcie = dev_get_priv(dev);
|
|
|
+
|
|
|
+ /* Get the controller base address */
|
|
|
+ pcie->dbi_base = (void *)dev_read_addr_name(dev, "dbics");
|
|
|
+ if ((fdt_addr_t)pcie->dbi_base == FDT_ADDR_T_NONE)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ /* Get the config space base address and size */
|
|
|
+ pcie->cfg_base = (void *)dev_read_addr_size_name(dev, "config",
|
|
|
+ &pcie->cfg_size);
|
|
|
+ if ((fdt_addr_t)pcie->cfg_base == FDT_ADDR_T_NONE)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ /* Get the iATU base address and size */
|
|
|
+ pcie->atu_base = (void *)dev_read_addr_name(dev, "atu");
|
|
|
+ if ((fdt_addr_t)pcie->atu_base == FDT_ADDR_T_NONE)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ /* Get the app base address and size */
|
|
|
+ pcie->app_base = (void *)dev_read_addr_name(dev, "app");
|
|
|
+ if ((fdt_addr_t)pcie->app_base == FDT_ADDR_T_NONE)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct dm_pci_ops pcie_dw_ti_ops = {
|
|
|
+ .read_config = pcie_dw_ti_read_config,
|
|
|
+ .write_config = pcie_dw_ti_write_config,
|
|
|
+};
|
|
|
+
|
|
|
+static const struct udevice_id pcie_dw_ti_ids[] = {
|
|
|
+ { .compatible = "ti,am654-pcie-rc" },
|
|
|
+ { }
|
|
|
+};
|
|
|
+
|
|
|
+U_BOOT_DRIVER(pcie_dw_ti) = {
|
|
|
+ .name = "pcie_dw_ti",
|
|
|
+ .id = UCLASS_PCI,
|
|
|
+ .of_match = pcie_dw_ti_ids,
|
|
|
+ .ops = &pcie_dw_ti_ops,
|
|
|
+ .ofdata_to_platdata = pcie_dw_ti_ofdata_to_platdata,
|
|
|
+ .probe = pcie_dw_ti_probe,
|
|
|
+ .priv_auto_alloc_size = sizeof(struct pcie_dw_ti),
|
|
|
+};
|