| /* |
| * Copyright 2014-2015 Freescale Semiconductor, Inc. |
| * Layerscape PCIe driver |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <asm/arch/fsl_serdes.h> |
| #include <pci.h> |
| #include <asm/io.h> |
| #include <errno.h> |
| #include <malloc.h> |
| #include <dm.h> |
| #include "pcie_layerscape.h" |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| LIST_HEAD(ls_pcie_list); |
| |
| static unsigned int dbi_readl(struct ls_pcie *pcie, unsigned int offset) |
| { |
| return in_le32(pcie->dbi + offset); |
| } |
| |
| static void dbi_writel(struct ls_pcie *pcie, unsigned int value, |
| unsigned int offset) |
| { |
| out_le32(pcie->dbi + offset, value); |
| } |
| |
| static unsigned int ctrl_readl(struct ls_pcie *pcie, unsigned int offset) |
| { |
| if (pcie->big_endian) |
| return in_be32(pcie->ctrl + offset); |
| else |
| return in_le32(pcie->ctrl + offset); |
| } |
| |
| static void ctrl_writel(struct ls_pcie *pcie, unsigned int value, |
| unsigned int offset) |
| { |
| if (pcie->big_endian) |
| out_be32(pcie->ctrl + offset, value); |
| else |
| out_le32(pcie->ctrl + offset, value); |
| } |
| |
| static int ls_pcie_ltssm(struct ls_pcie *pcie) |
| { |
| u32 state; |
| uint svr; |
| |
| svr = get_svr(); |
| if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { |
| state = ctrl_readl(pcie, LS1021_PEXMSCPORTSR(pcie->idx)); |
| state = (state >> LS1021_LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK; |
| } else { |
| state = ctrl_readl(pcie, PCIE_PF_DBG) & LTSSM_STATE_MASK; |
| } |
| |
| return state; |
| } |
| |
| static int ls_pcie_link_up(struct ls_pcie *pcie) |
| { |
| int ltssm; |
| |
| ltssm = ls_pcie_ltssm(pcie); |
| if (ltssm < LTSSM_PCIE_L0) |
| return 0; |
| |
| return 1; |
| } |
| |
| static void ls_pcie_cfg0_set_busdev(struct ls_pcie *pcie, u32 busdev) |
| { |
| dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0, |
| PCIE_ATU_VIEWPORT); |
| dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); |
| } |
| |
| static void ls_pcie_cfg1_set_busdev(struct ls_pcie *pcie, u32 busdev) |
| { |
| dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1, |
| PCIE_ATU_VIEWPORT); |
| dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); |
| } |
| |
| static void ls_pcie_atu_outbound_set(struct ls_pcie *pcie, int idx, int type, |
| u64 phys, u64 bus_addr, pci_size_t size) |
| { |
| dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | idx, PCIE_ATU_VIEWPORT); |
| dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_BASE); |
| dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_BASE); |
| dbi_writel(pcie, (u32)phys + size - 1, PCIE_ATU_LIMIT); |
| dbi_writel(pcie, (u32)bus_addr, PCIE_ATU_LOWER_TARGET); |
| dbi_writel(pcie, bus_addr >> 32, PCIE_ATU_UPPER_TARGET); |
| dbi_writel(pcie, type, PCIE_ATU_CR1); |
| dbi_writel(pcie, PCIE_ATU_ENABLE, PCIE_ATU_CR2); |
| } |
| |
| /* Use bar match mode and MEM type as default */ |
| static void ls_pcie_atu_inbound_set(struct ls_pcie *pcie, int idx, |
| int bar, u64 phys) |
| { |
| dbi_writel(pcie, PCIE_ATU_REGION_INBOUND | idx, PCIE_ATU_VIEWPORT); |
| dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_TARGET); |
| dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_TARGET); |
| dbi_writel(pcie, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1); |
| dbi_writel(pcie, PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE | |
| PCIE_ATU_BAR_NUM(bar), PCIE_ATU_CR2); |
| } |
| |
| static void ls_pcie_dump_atu(struct ls_pcie *pcie) |
| { |
| int i; |
| |
| for (i = 0; i < PCIE_ATU_REGION_NUM; i++) { |
| dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | i, |
| PCIE_ATU_VIEWPORT); |
| debug("iATU%d:\n", i); |
| debug("\tLOWER PHYS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_LOWER_BASE)); |
| debug("\tUPPER PHYS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_UPPER_BASE)); |
| debug("\tLOWER BUS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_LOWER_TARGET)); |
| debug("\tUPPER BUS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_UPPER_TARGET)); |
| debug("\tLIMIT 0x%08x\n", |
| readl(pcie->dbi + PCIE_ATU_LIMIT)); |
| debug("\tCR1 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_CR1)); |
| debug("\tCR2 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_CR2)); |
| } |
| } |
| |
| static void ls_pcie_setup_atu(struct ls_pcie *pcie) |
| { |
| struct pci_region *io, *mem, *pref; |
| unsigned long long offset = 0; |
| int idx = 0; |
| uint svr; |
| |
| svr = get_svr(); |
| if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { |
| offset = LS1021_PCIE_SPACE_OFFSET + |
| LS1021_PCIE_SPACE_SIZE * pcie->idx; |
| } |
| |
| /* ATU 0 : OUTBOUND : CFG0 */ |
| ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX0, |
| PCIE_ATU_TYPE_CFG0, |
| pcie->cfg_res.start + offset, |
| 0, |
| fdt_resource_size(&pcie->cfg_res) / 2); |
| /* ATU 1 : OUTBOUND : CFG1 */ |
| ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1, |
| PCIE_ATU_TYPE_CFG1, |
| pcie->cfg_res.start + offset + |
| fdt_resource_size(&pcie->cfg_res) / 2, |
| 0, |
| fdt_resource_size(&pcie->cfg_res) / 2); |
| |
| pci_get_regions(pcie->bus, &io, &mem, &pref); |
| idx = PCIE_ATU_REGION_INDEX1 + 1; |
| |
| if (io) |
| /* ATU : OUTBOUND : IO */ |
| ls_pcie_atu_outbound_set(pcie, idx++, |
| PCIE_ATU_TYPE_IO, |
| io->phys_start + offset, |
| io->bus_start, |
| io->size); |
| |
| if (mem) |
| /* ATU : OUTBOUND : MEM */ |
| ls_pcie_atu_outbound_set(pcie, idx++, |
| PCIE_ATU_TYPE_MEM, |
| mem->phys_start + offset, |
| mem->bus_start, |
| mem->size); |
| |
| if (pref) |
| /* ATU : OUTBOUND : pref */ |
| ls_pcie_atu_outbound_set(pcie, idx++, |
| PCIE_ATU_TYPE_MEM, |
| pref->phys_start + offset, |
| pref->bus_start, |
| pref->size); |
| |
| ls_pcie_dump_atu(pcie); |
| } |
| |
| /* Return 0 if the address is valid, -errno if not valid */ |
| static int ls_pcie_addr_valid(struct ls_pcie *pcie, pci_dev_t bdf) |
| { |
| struct udevice *bus = pcie->bus; |
| |
| if (!pcie->enabled) |
| return -ENXIO; |
| |
| if (PCI_BUS(bdf) < bus->seq) |
| return -EINVAL; |
| |
| if ((PCI_BUS(bdf) > bus->seq) && (!ls_pcie_link_up(pcie))) |
| return -EINVAL; |
| |
| if (PCI_BUS(bdf) <= (bus->seq + 1) && (PCI_DEV(bdf) > 0)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| void *ls_pcie_conf_address(struct ls_pcie *pcie, pci_dev_t bdf, |
| int offset) |
| { |
| struct udevice *bus = pcie->bus; |
| u32 busdev; |
| |
| if (PCI_BUS(bdf) == bus->seq) |
| return pcie->dbi + offset; |
| |
| busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) | |
| PCIE_ATU_DEV(PCI_DEV(bdf)) | |
| PCIE_ATU_FUNC(PCI_FUNC(bdf)); |
| |
| if (PCI_BUS(bdf) == bus->seq + 1) { |
| ls_pcie_cfg0_set_busdev(pcie, busdev); |
| return pcie->cfg0 + offset; |
| } else { |
| ls_pcie_cfg1_set_busdev(pcie, busdev); |
| return pcie->cfg1 + offset; |
| } |
| } |
| |
| static int ls_pcie_read_config(struct udevice *bus, pci_dev_t bdf, |
| uint offset, ulong *valuep, |
| enum pci_size_t size) |
| { |
| struct ls_pcie *pcie = dev_get_priv(bus); |
| void *address; |
| |
| if (ls_pcie_addr_valid(pcie, bdf)) { |
| *valuep = pci_get_ff(size); |
| return 0; |
| } |
| |
| address = ls_pcie_conf_address(pcie, bdf, offset); |
| |
| switch (size) { |
| case PCI_SIZE_8: |
| *valuep = readb(address); |
| return 0; |
| case PCI_SIZE_16: |
| *valuep = readw(address); |
| return 0; |
| case PCI_SIZE_32: |
| *valuep = readl(address); |
| return 0; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf, |
| uint offset, ulong value, |
| enum pci_size_t size) |
| { |
| struct ls_pcie *pcie = dev_get_priv(bus); |
| void *address; |
| |
| if (ls_pcie_addr_valid(pcie, bdf)) |
| return 0; |
| |
| address = ls_pcie_conf_address(pcie, bdf, offset); |
| |
| switch (size) { |
| case PCI_SIZE_8: |
| writeb(value, address); |
| return 0; |
| case PCI_SIZE_16: |
| writew(value, address); |
| return 0; |
| case PCI_SIZE_32: |
| writel(value, address); |
| return 0; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| /* Clear multi-function bit */ |
| static void ls_pcie_clear_multifunction(struct ls_pcie *pcie) |
| { |
| writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE); |
| } |
| |
| /* Fix class value */ |
| static void ls_pcie_fix_class(struct ls_pcie *pcie) |
| { |
| writew(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE); |
| } |
| |
| /* Drop MSG TLP except for Vendor MSG */ |
| static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie) |
| { |
| u32 val; |
| |
| val = dbi_readl(pcie, PCIE_STRFMR1); |
| val &= 0xDFFFFFFF; |
| dbi_writel(pcie, val, PCIE_STRFMR1); |
| } |
| |
| /* Disable all bars in RC mode */ |
| static void ls_pcie_disable_bars(struct ls_pcie *pcie) |
| { |
| u32 sriov; |
| |
| sriov = in_le32(pcie->dbi + PCIE_SRIOV); |
| |
| /* |
| * TODO: For PCIe controller with SRIOV, the method to disable bars |
| * is different and more complex, so will add later. |
| */ |
| if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) |
| return; |
| |
| dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_0); |
| dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_1); |
| dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1); |
| } |
| |
| static void ls_pcie_setup_ctrl(struct ls_pcie *pcie) |
| { |
| ls_pcie_setup_atu(pcie); |
| |
| dbi_writel(pcie, 1, PCIE_DBI_RO_WR_EN); |
| ls_pcie_fix_class(pcie); |
| ls_pcie_clear_multifunction(pcie); |
| ls_pcie_drop_msg_tlp(pcie); |
| dbi_writel(pcie, 0, PCIE_DBI_RO_WR_EN); |
| |
| ls_pcie_disable_bars(pcie); |
| } |
| |
| static void ls_pcie_ep_setup_atu(struct ls_pcie *pcie) |
| { |
| u64 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE; |
| |
| /* ATU 0 : INBOUND : map BAR0 */ |
| ls_pcie_atu_inbound_set(pcie, 0, 0, phys); |
| /* ATU 1 : INBOUND : map BAR1 */ |
| phys += PCIE_BAR1_SIZE; |
| ls_pcie_atu_inbound_set(pcie, 1, 1, phys); |
| /* ATU 2 : INBOUND : map BAR2 */ |
| phys += PCIE_BAR2_SIZE; |
| ls_pcie_atu_inbound_set(pcie, 2, 2, phys); |
| /* ATU 3 : INBOUND : map BAR4 */ |
| phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + PCIE_BAR4_SIZE; |
| ls_pcie_atu_inbound_set(pcie, 3, 4, phys); |
| |
| /* ATU 0 : OUTBOUND : map MEM */ |
| ls_pcie_atu_outbound_set(pcie, 0, |
| PCIE_ATU_TYPE_MEM, |
| pcie->cfg_res.start, |
| 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) |
| { |
| /* The least inbound window is 4KiB */ |
| if (size < 4 * 1024) |
| return; |
| |
| switch (bar) { |
| case 0: |
| writel(size - 1, bar_base + PCI_BASE_ADDRESS_0); |
| break; |
| case 1: |
| writel(size - 1, bar_base + PCI_BASE_ADDRESS_1); |
| break; |
| case 2: |
| writel(size - 1, bar_base + PCI_BASE_ADDRESS_2); |
| writel(0, bar_base + PCI_BASE_ADDRESS_3); |
| break; |
| case 4: |
| writel(size - 1, 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 - 4K configuration */ |
| ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE); |
| /* BAR1 - 32bit - 8K MSIX*/ |
| ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE); |
| /* BAR2 - 64bit - 4K MEM desciptor */ |
| ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE); |
| /* BAR4 - 64bit - 1M MEM*/ |
| ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE); |
| } |
| |
| static void ls_pcie_ep_enable_cfg(struct ls_pcie *pcie) |
| { |
| ctrl_writel(pcie, PCIE_CONFIG_READY, PCIE_PF_CONFIG); |
| } |
| |
| static void ls_pcie_setup_ep(struct ls_pcie *pcie) |
| { |
| u32 sriov; |
| |
| sriov = readl(pcie->dbi + PCIE_SRIOV); |
| if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) { |
| int pf, vf; |
| |
| for (pf = 0; pf < PCIE_PF_NUM; pf++) { |
| for (vf = 0; vf <= PCIE_VF_NUM; vf++) { |
| ctrl_writel(pcie, PCIE_LCTRL0_VAL(pf, vf), |
| PCIE_PF_VF_CTRL); |
| |
| ls_pcie_ep_setup_bars(pcie->dbi); |
| ls_pcie_ep_setup_atu(pcie); |
| } |
| } |
| /* 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); |
| } |
| |
| ls_pcie_ep_enable_cfg(pcie); |
| } |
| |
| static int ls_pcie_probe(struct udevice *dev) |
| { |
| struct ls_pcie *pcie = dev_get_priv(dev); |
| const void *fdt = gd->fdt_blob; |
| int node = dev_of_offset(dev); |
| u8 header_type; |
| u16 link_sta; |
| bool ep_mode; |
| int ret; |
| |
| pcie->bus = dev; |
| |
| ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| "dbi", &pcie->dbi_res); |
| if (ret) { |
| printf("ls-pcie: resource \"dbi\" not found\n"); |
| return ret; |
| } |
| |
| pcie->idx = (pcie->dbi_res.start - PCIE_SYS_BASE_ADDR) / PCIE_CCSR_SIZE; |
| |
| list_add(&pcie->list, &ls_pcie_list); |
| |
| pcie->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx)); |
| if (!pcie->enabled) { |
| printf("PCIe%d: %s disabled\n", pcie->idx, dev->name); |
| return 0; |
| } |
| |
| pcie->dbi = map_physmem(pcie->dbi_res.start, |
| fdt_resource_size(&pcie->dbi_res), |
| MAP_NOCACHE); |
| |
| ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| "lut", &pcie->lut_res); |
| if (!ret) |
| pcie->lut = map_physmem(pcie->lut_res.start, |
| fdt_resource_size(&pcie->lut_res), |
| MAP_NOCACHE); |
| |
| ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| "ctrl", &pcie->ctrl_res); |
| if (!ret) |
| pcie->ctrl = map_physmem(pcie->ctrl_res.start, |
| fdt_resource_size(&pcie->ctrl_res), |
| MAP_NOCACHE); |
| if (!pcie->ctrl) |
| pcie->ctrl = pcie->lut; |
| |
| if (!pcie->ctrl) { |
| printf("%s: NOT find CTRL\n", dev->name); |
| return -1; |
| } |
| |
| ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| "config", &pcie->cfg_res); |
| if (ret) { |
| printf("%s: resource \"config\" not found\n", dev->name); |
| return ret; |
| } |
| |
| pcie->cfg0 = map_physmem(pcie->cfg_res.start, |
| fdt_resource_size(&pcie->cfg_res), |
| MAP_NOCACHE); |
| pcie->cfg1 = pcie->cfg0 + fdt_resource_size(&pcie->cfg_res) / 2; |
| |
| pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian"); |
| |
| debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n", |
| dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut, |
| (unsigned long)pcie->ctrl, (unsigned long)pcie->cfg0, |
| pcie->big_endian); |
| |
| header_type = readb(pcie->dbi + PCI_HEADER_TYPE); |
| ep_mode = (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL; |
| printf("PCIe%u: %s %s", pcie->idx, dev->name, |
| ep_mode ? "Endpoint" : "Root Complex"); |
| |
| if (ep_mode) |
| ls_pcie_setup_ep(pcie); |
| else |
| ls_pcie_setup_ctrl(pcie); |
| |
| 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 const struct dm_pci_ops ls_pcie_ops = { |
| .read_config = ls_pcie_read_config, |
| .write_config = ls_pcie_write_config, |
| }; |
| |
| static const struct udevice_id ls_pcie_ids[] = { |
| { .compatible = "fsl,ls-pcie" }, |
| { } |
| }; |
| |
| U_BOOT_DRIVER(pci_layerscape) = { |
| .name = "pci_layerscape", |
| .id = UCLASS_PCI, |
| .of_match = ls_pcie_ids, |
| .ops = &ls_pcie_ops, |
| .probe = ls_pcie_probe, |
| .priv_auto_alloc_size = sizeof(struct ls_pcie), |
| }; |