| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright 2020 NXP |
| * Layerscape PCIe EP driver |
| */ |
| |
| #include <common.h> |
| #include <dm.h> |
| #include <dm/devres.h> |
| #include <errno.h> |
| #include <pci_ep.h> |
| #include <asm/io.h> |
| #include <linux/sizes.h> |
| #include <linux/log2.h> |
| #include "pcie_layerscape.h" |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| static void ls_pcie_ep_enable_cfg(struct ls_pcie_ep *pcie_ep) |
| { |
| struct ls_pcie *pcie = pcie_ep->pcie; |
| u32 config; |
| |
| config = ctrl_readl(pcie, PCIE_PF_CONFIG); |
| config |= PCIE_CONFIG_READY; |
| ctrl_writel(pcie, config, PCIE_PF_CONFIG); |
| } |
| |
| static int ls_ep_set_bar(struct udevice *dev, uint fn, struct pci_bar *ep_bar) |
| { |
| struct ls_pcie_ep *pcie_ep = dev_get_priv(dev); |
| struct ls_pcie *pcie = pcie_ep->pcie; |
| dma_addr_t bar_phys = ep_bar->phys_addr; |
| enum pci_barno bar = ep_bar->barno; |
| u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar); |
| int flags = ep_bar->flags; |
| int type, idx; |
| u64 size; |
| |
| idx = bar; |
| /* BAR size is 2^(aperture + 11) */ |
| size = max_t(size_t, ep_bar->size, FSL_PCIE_EP_MIN_APERTURE); |
| |
| if (!(flags & PCI_BASE_ADDRESS_SPACE)) |
| type = PCIE_ATU_TYPE_MEM; |
| else |
| type = PCIE_ATU_TYPE_IO; |
| |
| ls_pcie_atu_inbound_set(pcie, fn, 0, type, idx, bar, bar_phys); |
| |
| dbi_writel(pcie, lower_32_bits(size - 1), reg + PCIE_NO_SRIOV_BAR_BASE); |
| dbi_writel(pcie, flags, reg); |
| |
| if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
| dbi_writel(pcie, upper_32_bits(size - 1), |
| reg + 4 + PCIE_NO_SRIOV_BAR_BASE); |
| dbi_writel(pcie, 0, reg + 4); |
| } |
| |
| return 0; |
| } |
| |
| static struct pci_ep_ops ls_pcie_ep_ops = { |
| .set_bar = ls_ep_set_bar, |
| }; |
| |
| static void ls_pcie_ep_setup_atu(struct ls_pcie_ep *pcie_ep, u32 pf) |
| { |
| struct ls_pcie *pcie = pcie_ep->pcie; |
| u32 vf_flag = 0; |
| u64 phys = 0; |
| |
| phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + pf * SZ_64M; |
| |
| phys = ALIGN(phys, PCIE_BAR0_SIZE); |
| /* ATU 0 : INBOUND : map BAR0 */ |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 0 + pf * BAR_NUM, 0, phys); |
| /* ATU 1 : INBOUND : map BAR1 */ |
| phys = ALIGN(phys + PCIE_BAR0_SIZE, PCIE_BAR1_SIZE); |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 1 + pf * BAR_NUM, 1, phys); |
| /* ATU 2 : INBOUND : map BAR2 */ |
| phys = ALIGN(phys + PCIE_BAR1_SIZE, PCIE_BAR2_SIZE); |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 2 + pf * BAR_NUM, 2, phys); |
| /* ATU 3 : INBOUND : map BAR2 */ |
| phys = ALIGN(phys + PCIE_BAR2_SIZE, PCIE_BAR4_SIZE); |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 3 + pf * BAR_NUM, 4, phys); |
| |
| if (pcie_ep->sriov_flag) { |
| vf_flag = 1; |
| /* ATU 4 : INBOUND : map BAR0 */ |
| phys = ALIGN(phys + PCIE_BAR4_SIZE, PCIE_BAR0_SIZE); |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 4 + pf * BAR_NUM, 0, phys); |
| /* ATU 5 : INBOUND : map BAR1 */ |
| phys = ALIGN(phys + PCIE_BAR0_SIZE * PCIE_VF_NUM, |
| PCIE_BAR1_SIZE); |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 5 + pf * BAR_NUM, 1, phys); |
| /* ATU 6 : INBOUND : map BAR2 */ |
| phys = ALIGN(phys + PCIE_BAR1_SIZE * PCIE_VF_NUM, |
| PCIE_BAR2_SIZE); |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 6 + pf * BAR_NUM, 2, phys); |
| /* ATU 7 : INBOUND : map BAR4 */ |
| phys = ALIGN(phys + PCIE_BAR2_SIZE * PCIE_VF_NUM, |
| PCIE_BAR4_SIZE); |
| ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM, |
| 7 + pf * BAR_NUM, 4, phys); |
| } |
| |
| /* ATU: OUTBOUND : map MEM */ |
| ls_pcie_atu_outbound_set(pcie, pf, PCIE_ATU_TYPE_MEM, |
| (u64)pcie_ep->addr_res.start + |
| pf * CONFIG_SYS_PCI_MEMORY_SIZE, |
| 0, CONFIG_SYS_PCI_MEMORY_SIZE); |
| } |
| |
| /* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */ |
| static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size) |
| { |
| u32 mask; |
| |
| /* The least inbound window is 4KiB */ |
| if (size < SZ_4K) |
| mask = 0; |
| else |
| mask = size - 1; |
| |
| switch (bar) { |
| case 0: |
| writel(mask, bar_base + PCI_BASE_ADDRESS_0); |
| break; |
| case 1: |
| writel(mask, bar_base + PCI_BASE_ADDRESS_1); |
| break; |
| case 2: |
| writel(mask, bar_base + PCI_BASE_ADDRESS_2); |
| writel(0, bar_base + PCI_BASE_ADDRESS_3); |
| break; |
| case 4: |
| writel(mask, bar_base + PCI_BASE_ADDRESS_4); |
| writel(0, bar_base + PCI_BASE_ADDRESS_5); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void ls_pcie_ep_setup_bars(void *bar_base) |
| { |
| /* BAR0 - 32bit - MEM */ |
| ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE); |
| /* BAR1 - 32bit - MEM*/ |
| ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE); |
| /* BAR2 - 64bit - MEM */ |
| ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE); |
| /* BAR4 - 64bit - MEM */ |
| ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE); |
| } |
| |
| static void ls_pcie_ep_setup_vf_bars(void *bar_base) |
| { |
| /* VF BAR0 MASK register at offset 0x19c*/ |
| bar_base += PCIE_SRIOV_VFBAR0 - PCI_BASE_ADDRESS_0; |
| |
| /* VF-BAR0 - 32bit - MEM */ |
| ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE); |
| /* VF-BAR1 - 32bit - MEM*/ |
| ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE); |
| /* VF-BAR2 - 64bit - MEM */ |
| ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE); |
| /* VF-BAR4 - 64bit - MEM */ |
| ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE); |
| } |
| |
| static void ls_pcie_setup_ep(struct ls_pcie_ep *pcie_ep) |
| { |
| u32 sriov; |
| u32 pf, vf; |
| void *bar_base = NULL; |
| struct ls_pcie *pcie = pcie_ep->pcie; |
| |
| sriov = readl(pcie->dbi + PCIE_SRIOV); |
| if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) { |
| pcie_ep->sriov_flag = 1; |
| for (pf = 0; pf < PCIE_PF_NUM; pf++) { |
| /* |
| * The VF_BARn_REG register's Prefetchable and Type bit |
| * fields are overwritten by a write to VF's BAR Mask |
| * register. Before writing to the VF_BARn_MASK_REG |
| * register, write 0b to the PCIE_MISC_CONTROL_1_OFF |
| * register. |
| */ |
| writel(0, pcie->dbi + PCIE_MISC_CONTROL_1_OFF); |
| |
| bar_base = pcie->dbi + |
| PCIE_MASK_OFFSET(pcie_ep->cfg2_flag, pf, |
| pcie_ep->pf1_offset); |
| |
| if (pcie_ep->cfg2_flag) { |
| ctrl_writel(pcie, |
| PCIE_LCTRL0_VAL(pf, 0), |
| PCIE_PF_VF_CTRL); |
| ls_pcie_ep_setup_bars(bar_base); |
| |
| for (vf = 1; vf <= PCIE_VF_NUM; vf++) { |
| ctrl_writel(pcie, |
| PCIE_LCTRL0_VAL(pf, vf), |
| PCIE_PF_VF_CTRL); |
| ls_pcie_ep_setup_vf_bars(bar_base); |
| } |
| } else { |
| ls_pcie_ep_setup_bars(bar_base); |
| ls_pcie_ep_setup_vf_bars(bar_base); |
| } |
| |
| ls_pcie_ep_setup_atu(pcie_ep, pf); |
| } |
| |
| if (pcie_ep->cfg2_flag) /* Disable CFG2 */ |
| ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL); |
| } else { |
| ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE); |
| ls_pcie_ep_setup_atu(pcie_ep, 0); |
| } |
| |
| ls_pcie_dump_atu(pcie, PCIE_ATU_REGION_NUM_SRIOV, |
| PCIE_ATU_REGION_INBOUND); |
| |
| ls_pcie_ep_enable_cfg(pcie_ep); |
| } |
| |
| static int ls_pcie_ep_probe(struct udevice *dev) |
| { |
| struct ls_pcie_ep *pcie_ep = dev_get_priv(dev); |
| struct ls_pcie *pcie; |
| u16 link_sta; |
| int ret; |
| u32 svr; |
| |
| pcie = devm_kmalloc(dev, sizeof(*pcie), GFP_KERNEL); |
| if (!pcie) |
| return -ENOMEM; |
| |
| pcie_ep->pcie = pcie; |
| |
| pcie->dbi = (void __iomem *)devfdt_get_addr_index(dev, 0); |
| if (!pcie->dbi) |
| return -ENOMEM; |
| |
| pcie->ctrl = (void __iomem *)devfdt_get_addr_index(dev, 1); |
| if (!pcie->ctrl) |
| return -ENOMEM; |
| |
| ret = fdt_get_named_resource(gd->fdt_blob, dev_of_offset(dev), |
| "reg", "reg-names", |
| "addr_space", &pcie_ep->addr_res); |
| if (ret) { |
| printf("%s: resource \"addr_space\" not found\n", dev->name); |
| return ret; |
| } |
| |
| pcie->idx = ((unsigned long)pcie->dbi - PCIE_SYS_BASE_ADDR) / |
| PCIE_CCSR_SIZE; |
| |
| pcie->big_endian = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev), |
| "big-endian"); |
| |
| svr = SVR_SOC_VER(get_svr()); |
| |
| if (svr == SVR_LX2160A) |
| pcie_ep->pf1_offset = LX2160_PCIE_PF1_OFFSET; |
| else |
| pcie_ep->pf1_offset = LS_PCIE_PF1_OFFSET; |
| |
| if (svr == SVR_LS2080A || svr == SVR_LS2085A) |
| pcie_ep->cfg2_flag = 1; |
| else |
| pcie_ep->cfg2_flag = 0; |
| |
| pcie->mode = readb(pcie->dbi + PCI_HEADER_TYPE) & 0x7f; |
| if (pcie->mode != PCI_HEADER_TYPE_NORMAL) |
| return 0; |
| |
| pcie_ep->max_functions = fdtdec_get_int(gd->fdt_blob, |
| dev_of_offset(dev), |
| "max-functions", 1); |
| pcie_ep->num_ib_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), |
| "num-ib-windows", 8); |
| pcie_ep->num_ob_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), |
| "num-ob-windows", 8); |
| |
| printf("PCIe%u: %s %s", pcie->idx, dev->name, "Endpoint"); |
| ls_pcie_setup_ep(pcie_ep); |
| |
| if (!ls_pcie_link_up(pcie)) { |
| /* Let the user know there's no PCIe link */ |
| printf(": no link\n"); |
| return 0; |
| } |
| |
| /* Print the negotiated PCIe link width */ |
| link_sta = readw(pcie->dbi + PCIE_LINK_STA); |
| printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4, |
| link_sta & PCIE_LINK_SPEED_MASK); |
| |
| return 0; |
| } |
| |
| static int ls_pcie_ep_remove(struct udevice *dev) |
| { |
| return 0; |
| } |
| |
| const struct udevice_id ls_pcie_ep_ids[] = { |
| { .compatible = "fsl,ls-pcie-ep" }, |
| { } |
| }; |
| |
| U_BOOT_DRIVER(pci_layerscape_ep) = { |
| .name = "pci_layerscape_ep", |
| .id = UCLASS_PCI_EP, |
| .of_match = ls_pcie_ep_ids, |
| .ops = &ls_pcie_ep_ops, |
| .probe = ls_pcie_ep_probe, |
| .remove = ls_pcie_ep_remove, |
| .priv_auto_alloc_size = sizeof(struct ls_pcie_ep), |
| }; |