--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Broadcom
+ *
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <generic-phy.h>
+#include <pci.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <dm/device_compat.h>
+#include <linux/log2.h>
+
+#define EP_PERST_SOURCE_SELECT_SHIFT 2
+#define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT)
+#define EP_MODE_SURVIVE_PERST_SHIFT 1
+#define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT)
+#define RC_PCIE_RST_OUTPUT_SHIFT 0
+#define RC_PCIE_RST_OUTPUT BIT(RC_PCIE_RST_OUTPUT_SHIFT)
+
+#define CFG_IND_ADDR_MASK 0x00001ffc
+
+#define CFG_ADDR_BUS_NUM_SHIFT 20
+#define CFG_ADDR_BUS_NUM_MASK 0x0ff00000
+#define CFG_ADDR_DEV_NUM_SHIFT 15
+#define CFG_ADDR_DEV_NUM_MASK 0x000f8000
+#define CFG_ADDR_FUNC_NUM_SHIFT 12
+#define CFG_ADDR_FUNC_NUM_MASK 0x00007000
+#define CFG_ADDR_REG_NUM_SHIFT 2
+#define CFG_ADDR_REG_NUM_MASK 0x00000ffc
+#define CFG_ADDR_CFG_TYPE_SHIFT 0
+#define CFG_ADDR_CFG_TYPE_MASK 0x00000003
+
+#define IPROC_PCI_PM_CAP 0x48
+#define IPROC_PCI_PM_CAP_MASK 0xffff
+#define IPROC_PCI_EXP_CAP 0xac
+
+#define IPROC_PCIE_REG_INVALID 0xffff
+
+#define PCI_EXP_TYPE_ROOT_PORT 0x4 /* Root Port */
+#define PCI_EXP_RTCTL 28 /* Root Control */
+/* CRS Software Visibility capability */
+#define PCI_EXP_RTCAP_CRSVIS 0x0001
+
+#define PCI_EXP_LNKSTA 18 /* Link Status */
+#define PCI_EXP_LNKSTA_NLW 0x03f0 /* Negotiated Link Width */
+
+#define PCIE_PHYLINKUP_SHIFT 3
+#define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT)
+#define PCIE_DL_ACTIVE_SHIFT 2
+#define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
+
+/* derive the enum index of the outbound/inbound mapping registers */
+#define MAP_REG(base_reg, index) ((base_reg) + (index) * 2)
+
+/*
+ * Maximum number of outbound mapping window sizes that can be supported by any
+ * OARR/OMAP mapping pair
+ */
+#define MAX_NUM_OB_WINDOW_SIZES 4
+
+#define OARR_VALID_SHIFT 0
+#define OARR_VALID BIT(OARR_VALID_SHIFT)
+#define OARR_SIZE_CFG_SHIFT 1
+
+/*
+ * Maximum number of inbound mapping region sizes that can be supported by an
+ * IARR
+ */
+#define MAX_NUM_IB_REGION_SIZES 9
+
+#define IMAP_VALID_SHIFT 0
+#define IMAP_VALID BIT(IMAP_VALID_SHIFT)
+
+#define APB_ERR_EN_SHIFT 0
+#define APB_ERR_EN BIT(APB_ERR_EN_SHIFT)
+
+/**
+ * iProc PCIe host registers
+ */
+enum iproc_pcie_reg {
+ /* clock/reset signal control */
+ IPROC_PCIE_CLK_CTRL = 0,
+
+ /*
+ * To allow MSI to be steered to an external MSI controller (e.g., ARM
+ * GICv3 ITS)
+ */
+ IPROC_PCIE_MSI_GIC_MODE,
+
+ /*
+ * IPROC_PCIE_MSI_BASE_ADDR and IPROC_PCIE_MSI_WINDOW_SIZE define the
+ * window where the MSI posted writes are written, for the writes to be
+ * interpreted as MSI writes.
+ */
+ IPROC_PCIE_MSI_BASE_ADDR,
+ IPROC_PCIE_MSI_WINDOW_SIZE,
+
+ /*
+ * To hold the address of the register where the MSI writes are
+ * programed. When ARM GICv3 ITS is used, this should be programmed
+ * with the address of the GITS_TRANSLATER register.
+ */
+ IPROC_PCIE_MSI_ADDR_LO,
+ IPROC_PCIE_MSI_ADDR_HI,
+
+ /* enable MSI */
+ IPROC_PCIE_MSI_EN_CFG,
+
+ /* allow access to root complex configuration space */
+ IPROC_PCIE_CFG_IND_ADDR,
+ IPROC_PCIE_CFG_IND_DATA,
+
+ /* allow access to device configuration space */
+ IPROC_PCIE_CFG_ADDR,
+ IPROC_PCIE_CFG_DATA,
+
+ /* enable INTx */
+ IPROC_PCIE_INTX_EN,
+ IPROC_PCIE_INTX_CSR,
+
+ /* outbound address mapping */
+ IPROC_PCIE_OARR0,
+ IPROC_PCIE_OMAP0,
+ IPROC_PCIE_OARR1,
+ IPROC_PCIE_OMAP1,
+ IPROC_PCIE_OARR2,
+ IPROC_PCIE_OMAP2,
+ IPROC_PCIE_OARR3,
+ IPROC_PCIE_OMAP3,
+
+ /* inbound address mapping */
+ IPROC_PCIE_IARR0,
+ IPROC_PCIE_IMAP0,
+ IPROC_PCIE_IARR1,
+ IPROC_PCIE_IMAP1,
+ IPROC_PCIE_IARR2,
+ IPROC_PCIE_IMAP2,
+ IPROC_PCIE_IARR3,
+ IPROC_PCIE_IMAP3,
+ IPROC_PCIE_IARR4,
+ IPROC_PCIE_IMAP4,
+
+ /* config read status */
+ IPROC_PCIE_CFG_RD_STATUS,
+
+ /* link status */
+ IPROC_PCIE_LINK_STATUS,
+
+ /* enable APB error for unsupported requests */
+ IPROC_PCIE_APB_ERR_EN,
+
+ /* Ordering Mode configuration registers */
+ IPROC_PCIE_ORDERING_CFG,
+ IPROC_PCIE_IMAP0_RO_CONTROL,
+ IPROC_PCIE_IMAP1_RO_CONTROL,
+ IPROC_PCIE_IMAP2_RO_CONTROL,
+ IPROC_PCIE_IMAP3_RO_CONTROL,
+ IPROC_PCIE_IMAP4_RO_CONTROL,
+
+ /* total number of core registers */
+ IPROC_PCIE_MAX_NUM_REG,
+};
+
+/* iProc PCIe PAXB v2 registers */
+static const u16 iproc_pcie_reg_paxb_v2[] = {
+ [IPROC_PCIE_CLK_CTRL] = 0x000,
+ [IPROC_PCIE_CFG_IND_ADDR] = 0x120,
+ [IPROC_PCIE_CFG_IND_DATA] = 0x124,
+ [IPROC_PCIE_CFG_ADDR] = 0x1f8,
+ [IPROC_PCIE_CFG_DATA] = 0x1fc,
+ [IPROC_PCIE_INTX_EN] = 0x330,
+ [IPROC_PCIE_INTX_CSR] = 0x334,
+ [IPROC_PCIE_OARR0] = 0xd20,
+ [IPROC_PCIE_OMAP0] = 0xd40,
+ [IPROC_PCIE_OARR1] = 0xd28,
+ [IPROC_PCIE_OMAP1] = 0xd48,
+ [IPROC_PCIE_OARR2] = 0xd60,
+ [IPROC_PCIE_OMAP2] = 0xd68,
+ [IPROC_PCIE_OARR3] = 0xdf0,
+ [IPROC_PCIE_OMAP3] = 0xdf8,
+ [IPROC_PCIE_IARR0] = 0xd00,
+ [IPROC_PCIE_IMAP0] = 0xc00,
+ [IPROC_PCIE_IARR2] = 0xd10,
+ [IPROC_PCIE_IMAP2] = 0xcc0,
+ [IPROC_PCIE_IARR3] = 0xe00,
+ [IPROC_PCIE_IMAP3] = 0xe08,
+ [IPROC_PCIE_IARR4] = 0xe68,
+ [IPROC_PCIE_IMAP4] = 0xe70,
+ [IPROC_PCIE_CFG_RD_STATUS] = 0xee0,
+ [IPROC_PCIE_LINK_STATUS] = 0xf0c,
+ [IPROC_PCIE_APB_ERR_EN] = 0xf40,
+ [IPROC_PCIE_ORDERING_CFG] = 0x2000,
+ [IPROC_PCIE_IMAP0_RO_CONTROL] = 0x201c,
+ [IPROC_PCIE_IMAP1_RO_CONTROL] = 0x2020,
+ [IPROC_PCIE_IMAP2_RO_CONTROL] = 0x2024,
+ [IPROC_PCIE_IMAP3_RO_CONTROL] = 0x2028,
+ [IPROC_PCIE_IMAP4_RO_CONTROL] = 0x202c,
+};
+
+/* iProc PCIe PAXC v2 registers */
+static const u16 iproc_pcie_reg_paxc_v2[] = {
+ [IPROC_PCIE_MSI_GIC_MODE] = 0x050,
+ [IPROC_PCIE_MSI_BASE_ADDR] = 0x074,
+ [IPROC_PCIE_MSI_WINDOW_SIZE] = 0x078,
+ [IPROC_PCIE_MSI_ADDR_LO] = 0x07c,
+ [IPROC_PCIE_MSI_ADDR_HI] = 0x080,
+ [IPROC_PCIE_MSI_EN_CFG] = 0x09c,
+ [IPROC_PCIE_CFG_IND_ADDR] = 0x1f0,
+ [IPROC_PCIE_CFG_IND_DATA] = 0x1f4,
+ [IPROC_PCIE_CFG_ADDR] = 0x1f8,
+ [IPROC_PCIE_CFG_DATA] = 0x1fc,
+};
+
+/**
+ * List of device IDs of controllers that have corrupted
+ * capability list that require SW fixup
+ */
+static const u16 iproc_pcie_corrupt_cap_did[] = {
+ 0x16cd,
+ 0x16f0,
+ 0xd802,
+ 0xd804
+};
+
+enum iproc_pcie_type {
+ IPROC_PCIE_PAXB_V2,
+ IPROC_PCIE_PAXC,
+ IPROC_PCIE_PAXC_V2,
+};
+
+/**
+ * struct iproc_pcie_ob - iProc PCIe outbound mapping
+ *
+ * @axi_offset: offset from the AXI address to the internal address used by
+ * the iProc PCIe core
+ * @nr_windows: total number of supported outbound mapping windows
+ */
+struct iproc_pcie_ob {
+ resource_size_t axi_offset;
+ unsigned int nr_windows;
+};
+
+/**
+ * struct iproc_pcie_ib - iProc PCIe inbound mapping
+ *
+ * @nr_regions: total number of supported inbound mapping regions
+ */
+struct iproc_pcie_ib {
+ unsigned int nr_regions;
+};
+
+/**
+ * struct iproc_pcie_ob_map - outbound mapping controller specific parameters
+ *
+ * @window_sizes: list of supported outbound mapping window sizes in MB
+ * @nr_sizes: number of supported outbound mapping window sizes
+ */
+struct iproc_pcie_ob_map {
+ resource_size_t window_sizes[MAX_NUM_OB_WINDOW_SIZES];
+ unsigned int nr_sizes;
+};
+
+static const struct iproc_pcie_ob_map paxb_v2_ob_map[] = {
+ {
+ /* OARR0/OMAP0 */
+ .window_sizes = { 128, 256 },
+ .nr_sizes = 2,
+ },
+ {
+ /* OARR1/OMAP1 */
+ .window_sizes = { 128, 256 },
+ .nr_sizes = 2,
+ },
+ {
+ /* OARR2/OMAP2 */
+ .window_sizes = { 128, 256, 512, 1024 },
+ .nr_sizes = 4,
+ },
+ {
+ /* OARR3/OMAP3 */
+ .window_sizes = { 128, 256, 512, 1024 },
+ .nr_sizes = 4,
+ },
+};
+
+/**
+ * iProc PCIe inbound mapping type
+ */
+enum iproc_pcie_ib_map_type {
+ /* for DDR memory */
+ IPROC_PCIE_IB_MAP_MEM = 0,
+
+ /* for device I/O memory */
+ IPROC_PCIE_IB_MAP_IO,
+
+ /* invalid or unused */
+ IPROC_PCIE_IB_MAP_INVALID
+};
+
+/**
+ * struct iproc_pcie_ib_map - inbound mapping controller specific parameters
+ *
+ * @type: inbound mapping region type
+ * @size_unit: inbound mapping region size unit, could be SZ_1K, SZ_1M, or SZ_1G
+ * @region_sizes: list of supported inbound mapping region sizes in KB, MB, or
+ * GB, depedning on the size unit
+ * @nr_sizes: number of supported inbound mapping region sizes
+ * @nr_windows: number of supported inbound mapping windows for the region
+ * @imap_addr_offset: register offset between the upper and lower 32-bit
+ * IMAP address registers
+ * @imap_window_offset: register offset between each IMAP window
+ */
+struct iproc_pcie_ib_map {
+ enum iproc_pcie_ib_map_type type;
+ unsigned int size_unit;
+ resource_size_t region_sizes[MAX_NUM_IB_REGION_SIZES];
+ unsigned int nr_sizes;
+ unsigned int nr_windows;
+ u16 imap_addr_offset;
+ u16 imap_window_offset;
+};
+
+static const struct iproc_pcie_ib_map paxb_v2_ib_map[] = {
+ {
+ /* IARR0/IMAP0 */
+ .type = IPROC_PCIE_IB_MAP_IO,
+ .size_unit = SZ_1K,
+ .region_sizes = { 32 },
+ .nr_sizes = 1,
+ .nr_windows = 8,
+ .imap_addr_offset = 0x40,
+ .imap_window_offset = 0x4,
+ },
+ {
+ /* IARR1/IMAP1 (currently unused) */
+ .type = IPROC_PCIE_IB_MAP_INVALID,
+ },
+ {
+ /* IARR2/IMAP2 */
+ .type = IPROC_PCIE_IB_MAP_MEM,
+ .size_unit = SZ_1M,
+ .region_sizes = { 64, 128, 256, 512, 1024, 2048, 4096, 8192,
+ 16384 },
+ .nr_sizes = 9,
+ .nr_windows = 1,
+ .imap_addr_offset = 0x4,
+ .imap_window_offset = 0x8,
+ },
+ {
+ /* IARR3/IMAP3 */
+ .type = IPROC_PCIE_IB_MAP_MEM,
+ .size_unit = SZ_1G,
+ .region_sizes = { 1, 2, 4, 8, 16, 32 },
+ .nr_sizes = 6,
+ .nr_windows = 8,
+ .imap_addr_offset = 0x4,
+ .imap_window_offset = 0x8,
+ },
+ {
+ /* IARR4/IMAP4 */
+ .type = IPROC_PCIE_IB_MAP_MEM,
+ .size_unit = SZ_1G,
+ .region_sizes = { 32, 64, 128, 256, 512 },
+ .nr_sizes = 5,
+ .nr_windows = 8,
+ .imap_addr_offset = 0x4,
+ .imap_window_offset = 0x8,
+ },
+};
+
+/**
+ * struct iproc_pcie - iproc pcie device instance
+ *
+ * @dev: pointer to pcie udevice
+ * @base: device I/O base address
+ * @type: pci device type, PAXC or PAXB
+ * @reg_offsets: pointer to pcie host register
+ * @fix_paxc_cap: paxc capability
+ * @need_ob_cfg: outbound mapping status
+ * @ob: pcie outbound mapping
+ * @ob_map: pointer to outbound mapping parameters
+ * @need_ib_cfg: inbound mapping status
+ * @ib: pcie inbound mapping
+ * @ib_map: pointer to inbound mapping parameters
+ * @ep_is_internal: ep status
+ * @phy: phy device
+ * @link_is_active: link up status
+ * @has_apb_err_disable: apb error status
+ */
+struct iproc_pcie {
+ struct udevice *dev;
+ void __iomem *base;
+ enum iproc_pcie_type type;
+ u16 *reg_offsets;
+ bool fix_paxc_cap;
+ bool need_ob_cfg;
+ struct iproc_pcie_ob ob;
+ const struct iproc_pcie_ob_map *ob_map;
+ bool need_ib_cfg;
+ struct iproc_pcie_ib ib;
+ const struct iproc_pcie_ib_map *ib_map;
+ bool ep_is_internal;
+ struct phy phy;
+ bool link_is_active;
+ bool has_apb_err_disable;
+};
+
+static inline bool iproc_pcie_reg_is_invalid(u16 reg_offset)
+{
+ return !!(reg_offset == IPROC_PCIE_REG_INVALID);
+}
+
+static inline u16 iproc_pcie_reg_offset(struct iproc_pcie *pcie,
+ enum iproc_pcie_reg reg)
+{
+ return pcie->reg_offsets[reg];
+}
+
+static inline u32 iproc_pcie_read_reg(struct iproc_pcie *pcie,
+ enum iproc_pcie_reg reg)
+{
+ u16 offset = iproc_pcie_reg_offset(pcie, reg);
+
+ if (iproc_pcie_reg_is_invalid(offset))
+ return 0;
+
+ return readl(pcie->base + offset);
+}
+
+static inline void iproc_pcie_write_reg(struct iproc_pcie *pcie,
+ enum iproc_pcie_reg reg, u32 val)
+{
+ u16 offset = iproc_pcie_reg_offset(pcie, reg);
+
+ if (iproc_pcie_reg_is_invalid(offset))
+ return;
+
+ writel(val, pcie->base + offset);
+}
+
+static int iproc_pcie_map_ep_cfg_reg(const struct udevice *udev, pci_dev_t bdf,
+ uint where, void **paddress)
+{
+ struct iproc_pcie *pcie = dev_get_priv(udev);
+ unsigned int busno = PCI_BUS(bdf);
+ unsigned int slot = PCI_DEV(bdf);
+ unsigned int fn = PCI_FUNC(bdf);
+
+ u16 offset;
+ u32 val;
+
+ /* root complex access */
+ if (busno == 0) {
+ if (slot > 0 || fn > 0)
+ return -ENODEV;
+
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
+ where & CFG_IND_ADDR_MASK);
+ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
+ if (iproc_pcie_reg_is_invalid(offset))
+ return -ENODEV;
+
+ *paddress = (pcie->base + offset);
+ return 0;
+ }
+
+ if (!pcie->link_is_active)
+ return -ENODEV;
+
+ /* EP device access */
+ val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
+ (slot << CFG_ADDR_DEV_NUM_SHIFT) |
+ (fn << CFG_ADDR_FUNC_NUM_SHIFT) |
+ (where & CFG_ADDR_REG_NUM_MASK) |
+ (1 & CFG_ADDR_CFG_TYPE_MASK);
+
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val);
+ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA);
+
+ if (iproc_pcie_reg_is_invalid(offset))
+ return -ENODEV;
+
+ *paddress = (pcie->base + offset);
+
+ return 0;
+}
+
+static void iproc_pcie_fix_cap(struct iproc_pcie *pcie, int where, ulong *val)
+{
+ u32 i, dev_id;
+
+ switch (where & ~0x3) {
+ case PCI_VENDOR_ID:
+ dev_id = *val >> 16;
+
+ /*
+ * Activate fixup for those controllers that have corrupted
+ * capability list registers
+ */
+ for (i = 0; i < ARRAY_SIZE(iproc_pcie_corrupt_cap_did); i++)
+ if (dev_id == iproc_pcie_corrupt_cap_did[i])
+ pcie->fix_paxc_cap = true;
+ break;
+
+ case IPROC_PCI_PM_CAP:
+ if (pcie->fix_paxc_cap) {
+ /* advertise PM, force next capability to PCIe */
+ *val &= ~IPROC_PCI_PM_CAP_MASK;
+ *val |= IPROC_PCI_EXP_CAP << 8 | PCI_CAP_ID_PM;
+ }
+ break;
+
+ case IPROC_PCI_EXP_CAP:
+ if (pcie->fix_paxc_cap) {
+ /* advertise root port, version 2, terminate here */
+ *val = (PCI_EXP_TYPE_ROOT_PORT << 4 | 2) << 16 |
+ PCI_CAP_ID_EXP;
+ }
+ break;
+
+ case IPROC_PCI_EXP_CAP + PCI_EXP_RTCTL:
+ /* Don't advertise CRS SV support */
+ *val &= ~(PCI_EXP_RTCAP_CRSVIS << 16);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static int iproc_pci_raw_config_read32(struct iproc_pcie *pcie,
+ unsigned int devfn, int where,
+ int size, u32 *val)
+{
+ void __iomem *addr;
+ int ret;
+
+ ret = iproc_pcie_map_ep_cfg_reg(pcie->dev, devfn, where & ~0x3, &addr);
+ if (ret) {
+ *val = ~0;
+ return -EINVAL;
+ }
+
+ *val = readl(addr);
+
+ if (size <= 2)
+ *val = (*val >> (8 * (where & 3))) & ((1 << (size * 8)) - 1);
+
+ return 0;
+}
+
+static int iproc_pci_raw_config_write32(struct iproc_pcie *pcie,
+ unsigned int devfn, int where,
+ int size, u32 val)
+{
+ void __iomem *addr;
+ int ret;
+ u32 mask, tmp;
+
+ ret = iproc_pcie_map_ep_cfg_reg(pcie->dev, devfn, where & ~0x3, &addr);
+ if (ret)
+ return -EINVAL;
+
+ if (size == 4) {
+ writel(val, addr);
+ return 0;
+ }
+
+ mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
+ tmp = readl(addr) & mask;
+ tmp |= val << ((where & 0x3) * 8);
+ writel(tmp, addr);
+ return 0;
+}
+
+/**
+ * iproc_pcie_apb_err_disable() - configure apb error
+ *
+ * APB error forwarding can be disabled during access of configuration
+ * registers of the endpoint device, to prevent unsupported requests
+ * (typically seen during enumeration with multi-function devices) from
+ * triggering a system exception.
+ *
+ * @bus: pcie udevice
+ * @bdf: pdf value
+ * @disabled: flag to enable/disabled apb error
+ */
+static inline void iproc_pcie_apb_err_disable(const struct udevice *bus,
+ pci_dev_t bdf, bool disable)
+{
+ struct iproc_pcie *pcie = dev_get_priv(bus);
+ u32 val;
+
+ if (PCI_BUS(bdf) && pcie->has_apb_err_disable) {
+ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_APB_ERR_EN);
+ if (disable)
+ val &= ~APB_ERR_EN;
+ else
+ val |= APB_ERR_EN;
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_APB_ERR_EN, val);
+ }
+}
+
+static int iproc_pcie_config_read32(const struct udevice *bus, pci_dev_t bdf,
+ uint offset, ulong *valuep,
+ enum pci_size_t size)
+{
+ struct iproc_pcie *pcie = dev_get_priv(bus);
+ int ret;
+ ulong data;
+
+ iproc_pcie_apb_err_disable(bus, bdf, true);
+ ret = pci_generic_mmap_read_config(bus, iproc_pcie_map_ep_cfg_reg,
+ bdf, offset, &data, PCI_SIZE_32);
+ iproc_pcie_apb_err_disable(bus, bdf, false);
+ if (size <= PCI_SIZE_16)
+ *valuep = (data >> (8 * (offset & 3))) &
+ ((1 << (BIT(size) * 8)) - 1);
+ else
+ *valuep = data;
+
+ if (!ret && PCI_BUS(bdf) == 0)
+ iproc_pcie_fix_cap(pcie, offset, valuep);
+
+ return ret;
+}
+
+static int iproc_pcie_config_write32(struct udevice *bus, pci_dev_t bdf,
+ uint offset, ulong value,
+ enum pci_size_t size)
+{
+ void *addr;
+ ulong mask, tmp;
+ int ret;
+
+ ret = iproc_pcie_map_ep_cfg_reg(bus, bdf, offset, &addr);
+ if (ret)
+ return ret;
+
+ if (size == PCI_SIZE_32) {
+ writel(value, addr);
+ return ret;
+ }
+
+ iproc_pcie_apb_err_disable(bus, bdf, true);
+ mask = ~(((1 << (BIT(size) * 8)) - 1) << ((offset & 0x3) * 8));
+ tmp = readl(addr) & mask;
+ tmp |= (value << ((offset & 0x3) * 8));
+ writel(tmp, addr);
+ iproc_pcie_apb_err_disable(bus, bdf, false);
+
+ return ret;
+}
+
+const static struct dm_pci_ops iproc_pcie_ops = {
+ .read_config = iproc_pcie_config_read32,
+ .write_config = iproc_pcie_config_write32,
+};
+
+static int iproc_pcie_rev_init(struct iproc_pcie *pcie)
+{
+ unsigned int reg_idx;
+ const u16 *regs;
+ u16 num_elements;
+
+ switch (pcie->type) {
+ case IPROC_PCIE_PAXC_V2:
+ pcie->ep_is_internal = true;
+ regs = iproc_pcie_reg_paxc_v2;
+ num_elements = ARRAY_SIZE(iproc_pcie_reg_paxc_v2);
+ break;
+ case IPROC_PCIE_PAXB_V2:
+ regs = iproc_pcie_reg_paxb_v2;
+ num_elements = ARRAY_SIZE(iproc_pcie_reg_paxb_v2);
+ pcie->has_apb_err_disable = true;
+ if (pcie->need_ob_cfg) {
+ pcie->ob.axi_offset = 0;
+ pcie->ob_map = paxb_v2_ob_map;
+ pcie->ob.nr_windows = ARRAY_SIZE(paxb_v2_ob_map);
+ }
+ pcie->need_ib_cfg = true;
+ pcie->ib.nr_regions = ARRAY_SIZE(paxb_v2_ib_map);
+ pcie->ib_map = paxb_v2_ib_map;
+ break;
+ default:
+ dev_dbg(pcie->dev, "incompatible iProc PCIe interface\n");
+ return -EINVAL;
+ }
+
+ pcie->reg_offsets = calloc(IPROC_PCIE_MAX_NUM_REG,
+ sizeof(*pcie->reg_offsets));
+ if (!pcie->reg_offsets)
+ return -ENOMEM;
+
+ /* go through the register table and populate all valid registers */
+ pcie->reg_offsets[0] = (pcie->type == IPROC_PCIE_PAXC_V2) ?
+ IPROC_PCIE_REG_INVALID : regs[0];
+ for (reg_idx = 1; reg_idx < num_elements; reg_idx++)
+ pcie->reg_offsets[reg_idx] = regs[reg_idx] ?
+ regs[reg_idx] : IPROC_PCIE_REG_INVALID;
+
+ return 0;
+}
+
+static inline bool iproc_pcie_ob_is_valid(struct iproc_pcie *pcie,
+ int window_idx)
+{
+ u32 val;
+
+ val = iproc_pcie_read_reg(pcie, MAP_REG(IPROC_PCIE_OARR0, window_idx));
+
+ return !!(val & OARR_VALID);
+}
+
+static inline int iproc_pcie_ob_write(struct iproc_pcie *pcie, int window_idx,
+ int size_idx, u64 axi_addr, u64 pci_addr)
+{
+ u16 oarr_offset, omap_offset;
+
+ /*
+ * Derive the OARR/OMAP offset from the first pair (OARR0/OMAP0) based
+ * on window index.
+ */
+ oarr_offset = iproc_pcie_reg_offset(pcie, MAP_REG(IPROC_PCIE_OARR0,
+ window_idx));
+ omap_offset = iproc_pcie_reg_offset(pcie, MAP_REG(IPROC_PCIE_OMAP0,
+ window_idx));
+ if (iproc_pcie_reg_is_invalid(oarr_offset) ||
+ iproc_pcie_reg_is_invalid(omap_offset))
+ return -EINVAL;
+
+ /*
+ * Program the OARR registers. The upper 32-bit OARR register is
+ * always right after the lower 32-bit OARR register.
+ */
+ writel(lower_32_bits(axi_addr) | (size_idx << OARR_SIZE_CFG_SHIFT) |
+ OARR_VALID, pcie->base + oarr_offset);
+ writel(upper_32_bits(axi_addr), pcie->base + oarr_offset + 4);
+
+ /* now program the OMAP registers */
+ writel(lower_32_bits(pci_addr), pcie->base + omap_offset);
+ writel(upper_32_bits(pci_addr), pcie->base + omap_offset + 4);
+
+ debug("ob window [%d]: offset 0x%x axi %pap pci %pap\n",
+ window_idx, oarr_offset, &axi_addr, &pci_addr);
+ debug("oarr lo 0x%x oarr hi 0x%x\n",
+ readl(pcie->base + oarr_offset),
+ readl(pcie->base + oarr_offset + 4));
+ debug("omap lo 0x%x omap hi 0x%x\n",
+ readl(pcie->base + omap_offset),
+ readl(pcie->base + omap_offset + 4));
+
+ return 0;
+}
+
+/**
+ * iproc_pcie_setup_ob() - setup outbound address mapping
+ *
+ * Some iProc SoCs require the SW to configure the outbound address mapping
+ * Outbound address translation:
+ *
+ * iproc_pcie_address = axi_address - axi_offset
+ * OARR = iproc_pcie_address
+ * OMAP = pci_addr
+ * axi_addr -> iproc_pcie_address -> OARR -> OMAP -> pci_address
+ *
+ * @pcie: pcie device
+ * @axi_addr: axi address to be translated
+ * @pci_addr: pci address
+ * @size: window size
+ *
+ * @return: 0 on success and -ve on failure
+ */
+static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
+ u64 pci_addr, resource_size_t size)
+{
+ struct iproc_pcie_ob *ob = &pcie->ob;
+ int ret = -EINVAL, window_idx, size_idx;
+
+ if (axi_addr < ob->axi_offset) {
+ pr_err("axi address %pap less than offset %pap\n",
+ &axi_addr, &ob->axi_offset);
+ return -EINVAL;
+ }
+
+ /*
+ * Translate the AXI address to the internal address used by the iProc
+ * PCIe core before programming the OARR
+ */
+ axi_addr -= ob->axi_offset;
+
+ /* iterate through all OARR/OMAP mapping windows */
+ for (window_idx = ob->nr_windows - 1; window_idx >= 0; window_idx--) {
+ const struct iproc_pcie_ob_map *ob_map =
+ &pcie->ob_map[window_idx];
+
+ /*
+ * If current outbound window is already in use, move on to the
+ * next one.
+ */
+ if (iproc_pcie_ob_is_valid(pcie, window_idx))
+ continue;
+
+ /*
+ * Iterate through all supported window sizes within the
+ * OARR/OMAP pair to find a match. Go through the window sizes
+ * in a descending order.
+ */
+ for (size_idx = ob_map->nr_sizes - 1; size_idx >= 0;
+ size_idx--) {
+ resource_size_t window_size =
+ ob_map->window_sizes[size_idx] * SZ_1M;
+
+ /*
+ * Keep iterating until we reach the last window and
+ * with the minimal window size at index zero. In this
+ * case, we take a compromise by mapping it using the
+ * minimum window size that can be supported
+ */
+ if (size < window_size) {
+ if (size_idx > 0 || window_idx > 0)
+ continue;
+
+ /*
+ * For the corner case of reaching the minimal
+ * window size that can be supported on the
+ * last window
+ */
+ axi_addr = ALIGN_DOWN(axi_addr, window_size);
+ pci_addr = ALIGN_DOWN(pci_addr, window_size);
+ size = window_size;
+ }
+
+ if (!IS_ALIGNED(axi_addr, window_size) ||
+ !IS_ALIGNED(pci_addr, window_size)) {
+ pr_err("axi %pap or pci %pap not aligned\n",
+ &axi_addr, &pci_addr);
+ return -EINVAL;
+ }
+
+ /*
+ * Match found! Program both OARR and OMAP and mark
+ * them as a valid entry.
+ */
+ ret = iproc_pcie_ob_write(pcie, window_idx, size_idx,
+ axi_addr, pci_addr);
+ if (ret)
+ goto err_ob;
+
+ size -= window_size;
+ if (size == 0)
+ return 0;
+
+ /*
+ * If we are here, we are done with the current window,
+ * but not yet finished all mappings. Need to move on
+ * to the next window.
+ */
+ axi_addr += window_size;
+ pci_addr += window_size;
+ break;
+ }
+ }
+
+err_ob:
+ pr_err("unable to configure outbound mapping\n");
+ pr_err("axi %pap, axi offset %pap, pci %pap, res size %pap\n",
+ &axi_addr, &ob->axi_offset, &pci_addr, &size);
+
+ return ret;
+}
+
+static int iproc_pcie_map_ranges(struct udevice *dev)
+{
+ struct iproc_pcie *pcie = dev_get_priv(dev);
+ struct udevice *bus = pci_get_controller(dev);
+ struct pci_controller *hose = dev_get_uclass_priv(bus);
+ int i, ret;
+
+ for (i = 0; i < hose->region_count; i++) {
+ if (hose->regions[i].flags == PCI_REGION_MEM ||
+ hose->regions[i].flags == PCI_REGION_PREFETCH) {
+ debug("%d: bus_addr %p, axi_addr %p, size 0x%lx\n",
+ i, &hose->regions[i].bus_start,
+ &hose->regions[i].phys_start,
+ hose->regions[i].size);
+ ret = iproc_pcie_setup_ob(pcie,
+ hose->regions[i].phys_start,
+ hose->regions[i].bus_start,
+ hose->regions[i].size);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static inline bool iproc_pcie_ib_is_in_use(struct iproc_pcie *pcie,
+ int region_idx)
+{
+ const struct iproc_pcie_ib_map *ib_map = &pcie->ib_map[region_idx];
+ u32 val;
+
+ val = iproc_pcie_read_reg(pcie, MAP_REG(IPROC_PCIE_IARR0, region_idx));
+
+ return !!(val & (BIT(ib_map->nr_sizes) - 1));
+}
+
+static inline bool
+iproc_pcie_ib_check_type(const struct iproc_pcie_ib_map *ib_map,
+ enum iproc_pcie_ib_map_type type)
+{
+ return !!(ib_map->type == type);
+}
+
+static int iproc_pcie_ib_write(struct iproc_pcie *pcie, int region_idx,
+ int size_idx, int nr_windows, u64 axi_addr,
+ u64 pci_addr, resource_size_t size)
+{
+ const struct iproc_pcie_ib_map *ib_map = &pcie->ib_map[region_idx];
+ u16 iarr_offset, imap_offset;
+ u32 val;
+ int window_idx;
+
+ iarr_offset = iproc_pcie_reg_offset(pcie, MAP_REG(IPROC_PCIE_IARR0,
+ region_idx));
+ imap_offset = iproc_pcie_reg_offset(pcie, MAP_REG(IPROC_PCIE_IMAP0,
+ region_idx));
+ if (iproc_pcie_reg_is_invalid(iarr_offset) ||
+ iproc_pcie_reg_is_invalid(imap_offset))
+ return -EINVAL;
+
+ debug("ib region [%d]: offset 0x%x axi %pap pci %pap\n",
+ region_idx, iarr_offset, &axi_addr, &pci_addr);
+
+ /*
+ * Program the IARR registers. The upper 32-bit IARR register is
+ * always right after the lower 32-bit IARR register.
+ */
+ writel(lower_32_bits(pci_addr) | BIT(size_idx),
+ pcie->base + iarr_offset);
+ writel(upper_32_bits(pci_addr), pcie->base + iarr_offset + 4);
+
+ debug("iarr lo 0x%x iarr hi 0x%x\n",
+ readl(pcie->base + iarr_offset),
+ readl(pcie->base + iarr_offset + 4));
+
+ /*
+ * Now program the IMAP registers. Each IARR region may have one or
+ * more IMAP windows.
+ */
+ size >>= ilog2(nr_windows);
+ for (window_idx = 0; window_idx < nr_windows; window_idx++) {
+ val = readl(pcie->base + imap_offset);
+ val |= lower_32_bits(axi_addr) | IMAP_VALID;
+ writel(val, pcie->base + imap_offset);
+ writel(upper_32_bits(axi_addr),
+ pcie->base + imap_offset + ib_map->imap_addr_offset);
+
+ debug("imap window [%d] lo 0x%x hi 0x%x\n",
+ window_idx, readl(pcie->base + imap_offset),
+ readl(pcie->base + imap_offset +
+ ib_map->imap_addr_offset));
+
+ imap_offset += ib_map->imap_window_offset;
+ axi_addr += size;
+ }
+
+ return 0;
+}
+
+/**
+ * iproc_pcie_setup_ib() - setup inbound address mapping
+ *
+ * @pcie: pcie device
+ * @axi_addr: axi address to be translated
+ * @pci_addr: pci address
+ * @size: window size
+ * @type: inbound mapping type
+ *
+ * @return: 0 on success and -ve on failure
+ */
+static int iproc_pcie_setup_ib(struct iproc_pcie *pcie, u64 axi_addr,
+ u64 pci_addr, resource_size_t size,
+ enum iproc_pcie_ib_map_type type)
+{
+ struct iproc_pcie_ib *ib = &pcie->ib;
+ int ret;
+ unsigned int region_idx, size_idx;
+
+ /* iterate through all IARR mapping regions */
+ for (region_idx = 0; region_idx < ib->nr_regions; region_idx++) {
+ const struct iproc_pcie_ib_map *ib_map =
+ &pcie->ib_map[region_idx];
+
+ /*
+ * If current inbound region is already in use or not a
+ * compatible type, move on to the next.
+ */
+ if (iproc_pcie_ib_is_in_use(pcie, region_idx) ||
+ !iproc_pcie_ib_check_type(ib_map, type))
+ continue;
+
+ /* iterate through all supported region sizes to find a match */
+ for (size_idx = 0; size_idx < ib_map->nr_sizes; size_idx++) {
+ resource_size_t region_size =
+ ib_map->region_sizes[size_idx] * ib_map->size_unit;
+
+ if (size != region_size)
+ continue;
+
+ if (!IS_ALIGNED(axi_addr, region_size) ||
+ !IS_ALIGNED(pci_addr, region_size)) {
+ pr_err("axi %pap or pci %pap not aligned\n",
+ &axi_addr, &pci_addr);
+ return -EINVAL;
+ }
+
+ /* Match found! Program IARR and all IMAP windows. */
+ ret = iproc_pcie_ib_write(pcie, region_idx, size_idx,
+ ib_map->nr_windows, axi_addr,
+ pci_addr, size);
+ if (ret)
+ goto err_ib;
+ else
+ return 0;
+ }
+ }
+ ret = -EINVAL;
+
+err_ib:
+ pr_err("unable to configure inbound mapping\n");
+ pr_err("axi %pap, pci %pap, res size %pap\n",
+ &axi_addr, &pci_addr, &size);
+
+ return ret;
+}
+
+static int iproc_pcie_map_dma_ranges(struct iproc_pcie *pcie)
+{
+ int ret;
+ struct pci_region regions;
+ int i = 0;
+
+ while (!pci_get_dma_regions(pcie->dev, ®ions, i)) {
+ dev_dbg(pcie->dev,
+ "dma %d: bus_addr %#lx, axi_addr %#llx, size %#lx\n",
+ i, regions.bus_start, regions.phys_start, regions.size);
+
+ /* Each range entry corresponds to an inbound mapping region */
+ ret = iproc_pcie_setup_ib(pcie, regions.phys_start,
+ regions.bus_start,
+ regions.size,
+ IPROC_PCIE_IB_MAP_MEM);
+ if (ret)
+ return ret;
+ i++;
+ }
+ return 0;
+}
+
+static void iproc_pcie_reset_map_regs(struct iproc_pcie *pcie)
+{
+ struct iproc_pcie_ib *ib = &pcie->ib;
+ struct iproc_pcie_ob *ob = &pcie->ob;
+ int window_idx, region_idx;
+
+ if (pcie->ep_is_internal)
+ return;
+
+ /* iterate through all OARR mapping regions */
+ for (window_idx = ob->nr_windows - 1; window_idx >= 0; window_idx--) {
+ iproc_pcie_write_reg(pcie, MAP_REG(IPROC_PCIE_OARR0,
+ window_idx), 0);
+ }
+
+ /* iterate through all IARR mapping regions */
+ for (region_idx = 0; region_idx < ib->nr_regions; region_idx++) {
+ iproc_pcie_write_reg(pcie, MAP_REG(IPROC_PCIE_IARR0,
+ region_idx), 0);
+ }
+}
+
+static void iproc_pcie_reset(struct iproc_pcie *pcie)
+{
+ u32 val;
+
+ /*
+ * PAXC and the internal emulated endpoint device downstream should not
+ * be reset. If firmware has been loaded on the endpoint device at an
+ * earlier boot stage, reset here causes issues.
+ */
+ if (pcie->ep_is_internal)
+ return;
+
+ /*
+ * Select perst_b signal as reset source. Put the device into reset,
+ * and then bring it out of reset
+ */
+ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL);
+ val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST &
+ ~RC_PCIE_RST_OUTPUT;
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
+ udelay(250);
+
+ val |= RC_PCIE_RST_OUTPUT;
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
+ mdelay(100);
+}
+
+static inline bool iproc_pcie_link_is_active(struct iproc_pcie *pcie)
+{
+ u32 val;
+
+ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_LINK_STATUS);
+ return !!((val & PCIE_PHYLINKUP) && (val & PCIE_DL_ACTIVE));
+}
+
+static int iproc_pcie_check_link(struct iproc_pcie *pcie)
+{
+ u32 link_status, class;
+
+ pcie->link_is_active = false;
+ /* force class to PCI_CLASS_BRIDGE_PCI (0x0604) */
+#define PCI_BRIDGE_CTRL_REG_OFFSET 0x43c
+#define PCI_CLASS_BRIDGE_MASK 0xffff00
+#define PCI_CLASS_BRIDGE_SHIFT 8
+ iproc_pci_raw_config_read32(pcie, 0,
+ PCI_BRIDGE_CTRL_REG_OFFSET,
+ 4, &class);
+ class &= ~PCI_CLASS_BRIDGE_MASK;
+ class |= (PCI_CLASS_BRIDGE_PCI << PCI_CLASS_BRIDGE_SHIFT);
+ iproc_pci_raw_config_write32(pcie, 0,
+ PCI_BRIDGE_CTRL_REG_OFFSET,
+ 4, class);
+
+ /*
+ * PAXC connects to emulated endpoint devices directly and does not
+ * have a Serdes. Therefore skip the link detection logic here.
+ */
+ if (pcie->ep_is_internal) {
+ pcie->link_is_active = true;
+ return 0;
+ }
+
+ if (!iproc_pcie_link_is_active(pcie)) {
+ pr_err("PHY or data link is INACTIVE!\n");
+ return -ENODEV;
+ }
+
+#define PCI_TARGET_LINK_SPEED_MASK 0xf
+#define PCI_TARGET_LINK_WIDTH_MASK 0x3f
+#define PCI_TARGET_LINK_WIDTH_OFFSET 0x4
+
+ /* check link status to see if link is active */
+ iproc_pci_raw_config_read32(pcie, 0,
+ IPROC_PCI_EXP_CAP + PCI_EXP_LNKSTA,
+ 2, &link_status);
+ if (link_status & PCI_EXP_LNKSTA_NLW)
+ pcie->link_is_active = true;
+
+ if (pcie->link_is_active)
+ pr_info("link UP @ Speed Gen-%d and width-x%d\n",
+ link_status & PCI_TARGET_LINK_SPEED_MASK,
+ (link_status >> PCI_TARGET_LINK_WIDTH_OFFSET) &
+ PCI_TARGET_LINK_WIDTH_MASK);
+ else
+ pr_info("link DOWN\n");
+
+ return 0;
+}
+
+static int iproc_pcie_probe(struct udevice *dev)
+{
+ struct iproc_pcie *pcie = dev_get_priv(dev);
+ int ret;
+
+ pcie->type = (enum iproc_pcie_type)dev_get_driver_data(dev);
+ debug("PAX type %d\n", pcie->type);
+ pcie->base = dev_read_addr_ptr(dev);
+ debug("PAX reg base %p\n", pcie->base);
+
+ if (!pcie->base)
+ return -ENODEV;
+
+ if (dev_read_bool(dev, "brcm,pcie-ob"))
+ pcie->need_ob_cfg = true;
+
+ pcie->dev = dev;
+ ret = iproc_pcie_rev_init(pcie);
+ if (ret)
+ return ret;
+
+ if (!pcie->ep_is_internal) {
+ ret = generic_phy_get_by_name(dev, "pcie-phy", &pcie->phy);
+ if (!ret) {
+ ret = generic_phy_init(&pcie->phy);
+ if (ret) {
+ pr_err("failed to init %s PHY\n", dev->name);
+ return ret;
+ }
+
+ ret = generic_phy_power_on(&pcie->phy);
+ if (ret) {
+ pr_err("power on %s PHY failed\n", dev->name);
+ goto err_exit_phy;
+ }
+ }
+ }
+
+ iproc_pcie_reset(pcie);
+
+ if (pcie->need_ob_cfg) {
+ ret = iproc_pcie_map_ranges(dev);
+ if (ret) {
+ pr_err("outbound map failed\n");
+ goto err_power_off_phy;
+ }
+ }
+
+ if (pcie->need_ib_cfg) {
+ ret = iproc_pcie_map_dma_ranges(pcie);
+ if (ret) {
+ pr_err("inbound map failed\n");
+ goto err_power_off_phy;
+ }
+ }
+
+ if (iproc_pcie_check_link(pcie))
+ pr_info("no PCIe EP device detected\n");
+
+ return 0;
+
+err_power_off_phy:
+ generic_phy_power_off(&pcie->phy);
+err_exit_phy:
+ generic_phy_exit(&pcie->phy);
+ return ret;
+}
+
+static int iproc_pcie_remove(struct udevice *dev)
+{
+ struct iproc_pcie *pcie = dev_get_priv(dev);
+ int ret;
+
+ iproc_pcie_reset_map_regs(pcie);
+
+ if (generic_phy_valid(&pcie->phy)) {
+ ret = generic_phy_power_off(&pcie->phy);
+ if (ret) {
+ pr_err("failed to power off PCIe phy\n");
+ return ret;
+ }
+
+ ret = generic_phy_exit(&pcie->phy);
+ if (ret) {
+ pr_err("failed to power off PCIe phy\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct udevice_id pci_iproc_ids[] = {
+ { .compatible = "brcm,iproc-pcie-paxb-v2",
+ .data = IPROC_PCIE_PAXB_V2 },
+ { .compatible = "brcm,iproc-pcie-paxc-v2",
+ .data = IPROC_PCIE_PAXC_V2 },
+ { }
+};
+
+U_BOOT_DRIVER(pci_iproc) = {
+ .name = "pci_iproc",
+ .id = UCLASS_PCI,
+ .of_match = pci_iproc_ids,
+ .ops = &iproc_pcie_ops,
+ .probe = iproc_pcie_probe,
+ .remove = iproc_pcie_remove,
+ .priv_auto_alloc_size = sizeof(struct iproc_pcie),
+ .flags = DM_REMOVE_OS_PREPARE,
+};
projects / u-boot.git / commitdiff
