diff options
| -rw-r--r-- | drivers/pci/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/pci/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pci/pcie_dw_ti.c | 725 |
3 files changed, 732 insertions, 0 deletions
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index 3fe38f7315..bdfc0c1796 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -145,4 +145,10 @@ config PCI_MVEBU Say Y here if you want to enable PCIe controller support on Armada XP/38x SoCs. +config PCI_KEYSTONE + bool "TI Keystone PCIe controller" + depends on DM_PCI + help + Say Y here if you want to enable PCI controller support on AM654 SoC. + endif diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile index b5ebd50c85..e54a98b8c9 100644 --- a/drivers/pci/Makefile +++ b/drivers/pci/Makefile @@ -38,3 +38,4 @@ obj-$(CONFIG_PCIE_LAYERSCAPE_GEN4) += pcie_layerscape_gen4.o \ pcie_layerscape_gen4_fixup.o obj-$(CONFIG_PCI_XILINX) += pcie_xilinx.o obj-$(CONFIG_PCIE_INTEL_FPGA) += pcie_intel_fpga.o +obj-$(CONFIG_PCI_KEYSTONE) += pcie_dw_ti.o diff --git a/drivers/pci/pcie_dw_ti.c b/drivers/pci/pcie_dw_ti.c new file mode 100644 index 0000000000..b37fc2de7f --- /dev/null +++ b/drivers/pci/pcie_dw_ti.c @@ -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), +}; |