diff options
author | Xiaowei Bao <xiaowei.bao@nxp.com> | 2020-07-09 23:31:33 +0800 |
---|---|---|
committer | Priyanka Jain <priyanka.jain@nxp.com> | 2020-07-27 14:24:15 +0530 |
commit | 118e58e26eba4129737880b1ba39ca7c0181e1bd (patch) | |
tree | dbe808f971c97e39893ed2316561f4d2195c955c /drivers/pci/pcie_layerscape_rc.c | |
parent | be2c7d764a52cd40dd9bf4793f0107a6a3fc3466 (diff) |
pci: layerscape: Split the EP and RC driver
Split the RC and EP driver, and reimplement the EP driver base on
the EP framework.
Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[Rebased]
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
Diffstat (limited to 'drivers/pci/pcie_layerscape_rc.c')
-rw-r--r-- | drivers/pci/pcie_layerscape_rc.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/drivers/pci/pcie_layerscape_rc.c b/drivers/pci/pcie_layerscape_rc.c new file mode 100644 index 0000000000..e922e5dbcd --- /dev/null +++ b/drivers/pci/pcie_layerscape_rc.c @@ -0,0 +1,379 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2020 NXP + * Layerscape PCIe driver + */ + +#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 <dm/devres.h> +#if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \ + defined(CONFIG_ARM) +#include <asm/arch/clock.h> +#endif +#include "pcie_layerscape.h" + +DECLARE_GLOBAL_DATA_PTR; + +static void ls_pcie_cfg0_set_busdev(struct ls_pcie_rc *pcie_rc, u32 busdev) +{ + struct ls_pcie *pcie = pcie_rc->pcie; + + 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_rc *pcie_rc, u32 busdev) +{ + struct ls_pcie *pcie = pcie_rc->pcie; + + 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_setup_atu(struct ls_pcie_rc *pcie_rc) +{ + struct pci_region *io, *mem, *pref; + unsigned long long offset = 0; + struct ls_pcie *pcie = pcie_rc->pcie; + 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_rc->cfg_res.start + offset, + 0, + fdt_resource_size(&pcie_rc->cfg_res) / 2); + /* ATU 1 : OUTBOUND : CFG1 */ + ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1, + PCIE_ATU_TYPE_CFG1, + pcie_rc->cfg_res.start + offset + + fdt_resource_size(&pcie_rc->cfg_res) / 2, + 0, + fdt_resource_size(&pcie_rc->cfg_res) / 2); + + pci_get_regions(pcie_rc->bus, &io, &mem, &pref); + idx = PCIE_ATU_REGION_INDEX1 + 1; + + /* Fix the pcie memory map for LS2088A series SoCs */ + svr = (svr >> SVR_VAR_PER_SHIFT) & 0xFFFFFE; + if (svr == SVR_LS2088A || svr == SVR_LS2084A || + svr == SVR_LS2048A || svr == SVR_LS2044A || + svr == SVR_LS2081A || svr == SVR_LS2041A) { + if (io) + io->phys_start = (io->phys_start & + (PCIE_PHYS_SIZE - 1)) + + LS2088A_PCIE1_PHYS_ADDR + + LS2088A_PCIE_PHYS_SIZE * pcie->idx; + if (mem) + mem->phys_start = (mem->phys_start & + (PCIE_PHYS_SIZE - 1)) + + LS2088A_PCIE1_PHYS_ADDR + + LS2088A_PCIE_PHYS_SIZE * pcie->idx; + if (pref) + pref->phys_start = (pref->phys_start & + (PCIE_PHYS_SIZE - 1)) + + LS2088A_PCIE1_PHYS_ADDR + + LS2088A_PCIE_PHYS_SIZE * pcie->idx; + } + + 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_rc *pcie_rc, pci_dev_t bdf) +{ + struct udevice *bus = pcie_rc->bus; + struct ls_pcie *pcie = pcie_rc->pcie; + + if (pcie->mode == PCI_HEADER_TYPE_NORMAL) + return -ENODEV; + + if (!pcie_rc->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; +} + +int ls_pcie_conf_address(const struct udevice *bus, pci_dev_t bdf, + uint offset, void **paddress) +{ + struct ls_pcie_rc *pcie_rc = dev_get_priv(bus); + struct ls_pcie *pcie = pcie_rc->pcie; + u32 busdev; + + if (ls_pcie_addr_valid(pcie_rc, bdf)) + return -EINVAL; + + if (PCI_BUS(bdf) == bus->seq) { + *paddress = pcie->dbi + offset; + return 0; + } + + busdev = PCIE_ATU_BUS(PCI_BUS(bdf) - bus->seq) | + 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_rc, busdev); + *paddress = pcie_rc->cfg0 + offset; + } else { + ls_pcie_cfg1_set_busdev(pcie_rc, busdev); + *paddress = pcie_rc->cfg1 + offset; + } + return 0; +} + +static int ls_pcie_read_config(const struct udevice *bus, pci_dev_t bdf, + uint offset, ulong *valuep, + enum pci_size_t size) +{ + return pci_generic_mmap_read_config(bus, ls_pcie_conf_address, + bdf, offset, valuep, size); +} + +static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf, + uint offset, ulong value, + enum pci_size_t size) +{ + return pci_generic_mmap_write_config(bus, ls_pcie_conf_address, + bdf, offset, value, size); +} + +/* Clear multi-function bit */ +static void ls_pcie_clear_multifunction(struct ls_pcie_rc *pcie_rc) +{ + struct ls_pcie *pcie = pcie_rc->pcie; + + writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE); +} + +/* Fix class value */ +static void ls_pcie_fix_class(struct ls_pcie_rc *pcie_rc) +{ + struct ls_pcie *pcie = pcie_rc->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_rc *pcie_rc) +{ + struct ls_pcie *pcie = pcie_rc->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_rc *pcie_rc) +{ + struct ls_pcie *pcie = pcie_rc->pcie; + + 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, 0xfffffffe, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1); +} + +static void ls_pcie_setup_ctrl(struct ls_pcie_rc *pcie_rc) +{ + struct ls_pcie *pcie = pcie_rc->pcie; + + ls_pcie_setup_atu(pcie_rc); + + ls_pcie_dbi_ro_wr_en(pcie); + ls_pcie_fix_class(pcie_rc); + ls_pcie_clear_multifunction(pcie_rc); + ls_pcie_drop_msg_tlp(pcie_rc); + ls_pcie_dbi_ro_wr_dis(pcie); + + ls_pcie_disable_bars(pcie_rc); + pcie_rc->stream_id_cur = 0; +} + +static int ls_pcie_probe(struct udevice *dev) +{ + struct ls_pcie_rc *pcie_rc = dev_get_priv(dev); + const void *fdt = gd->fdt_blob; + int node = dev_of_offset(dev); + struct ls_pcie *pcie; + u16 link_sta; + uint svr; + int ret; + fdt_size_t cfg_size; + + pcie_rc->bus = dev; + + pcie = devm_kmalloc(dev, sizeof(*pcie), GFP_KERNEL); + if (!pcie) + return -ENOMEM; + + pcie_rc->pcie = pcie; + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "dbi", &pcie_rc->dbi_res); + if (ret) { + printf("ls-pcie: resource \"dbi\" not found\n"); + return ret; + } + + pcie->idx = (pcie_rc->dbi_res.start - PCIE_SYS_BASE_ADDR) / + PCIE_CCSR_SIZE; + + list_add(&pcie_rc->list, &ls_pcie_list); + + pcie_rc->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx)); + if (!pcie_rc->enabled) { + printf("PCIe%d: %s disabled\n", pcie->idx, dev->name); + return 0; + } + + pcie->dbi = map_physmem(pcie_rc->dbi_res.start, + fdt_resource_size(&pcie_rc->dbi_res), + MAP_NOCACHE); + + pcie->mode = readb(pcie->dbi + PCI_HEADER_TYPE) & 0x7f; + if (pcie->mode == PCI_HEADER_TYPE_NORMAL) + return 0; + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "lut", &pcie_rc->lut_res); + if (!ret) + pcie->lut = map_physmem(pcie_rc->lut_res.start, + fdt_resource_size(&pcie_rc->lut_res), + MAP_NOCACHE); + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "ctrl", &pcie_rc->ctrl_res); + if (!ret) + pcie->ctrl = map_physmem(pcie_rc->ctrl_res.start, + fdt_resource_size(&pcie_rc->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_rc->cfg_res); + if (ret) { + printf("%s: resource \"config\" not found\n", dev->name); + return ret; + } + + /* + * Fix the pcie memory map address and PF control registers address + * for LS2088A series SoCs + */ + svr = get_svr(); + svr = (svr >> SVR_VAR_PER_SHIFT) & 0xFFFFFE; + if (svr == SVR_LS2088A || svr == SVR_LS2084A || + svr == SVR_LS2048A || svr == SVR_LS2044A || + svr == SVR_LS2081A || svr == SVR_LS2041A) { + cfg_size = fdt_resource_size(&pcie_rc->cfg_res); + pcie_rc->cfg_res.start = LS2088A_PCIE1_PHYS_ADDR + + LS2088A_PCIE_PHYS_SIZE * pcie->idx; + pcie_rc->cfg_res.end = pcie_rc->cfg_res.start + cfg_size; + pcie->ctrl = pcie->lut + 0x40000; + } + + pcie_rc->cfg0 = map_physmem(pcie_rc->cfg_res.start, + fdt_resource_size(&pcie_rc->cfg_res), + MAP_NOCACHE); + pcie_rc->cfg1 = pcie_rc->cfg0 + + fdt_resource_size(&pcie_rc->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_rc->cfg0, + pcie->big_endian); + + printf("PCIe%u: %s %s", pcie->idx, dev->name, "Root Complex"); + ls_pcie_setup_ctrl(pcie_rc); + + 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_rc), +}; |