| // SPDX-License-Identifier: GPL-2.0+ OR X11 |
| /* |
| * Copyright 2019 NXP |
| * |
| * PCIe DM U-Boot driver for Freescale PowerPC SoCs |
| * Author: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> |
| */ |
| |
| #include <common.h> |
| #include <dm.h> |
| #include <malloc.h> |
| #include <mapmem.h> |
| #include <pci.h> |
| #include <asm/fsl_pci.h> |
| #include <asm/fsl_serdes.h> |
| #include <asm/io.h> |
| #include "pcie_fsl.h" |
| |
| LIST_HEAD(fsl_pcie_list); |
| |
| static int fsl_pcie_link_up(struct fsl_pcie *pcie); |
| |
| static int fsl_pcie_addr_valid(struct fsl_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 && (!fsl_pcie_link_up(pcie) || pcie->mode)) |
| return -EINVAL; |
| |
| if (PCI_BUS(bdf) == bus->seq && (PCI_DEV(bdf) > 0 || PCI_FUNC(bdf) > 0)) |
| return -EINVAL; |
| |
| if (PCI_BUS(bdf) == (bus->seq + 1) && (PCI_DEV(bdf) > 0)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_read_config(struct udevice *bus, pci_dev_t bdf, |
| uint offset, ulong *valuep, |
| enum pci_size_t size) |
| { |
| struct fsl_pcie *pcie = dev_get_priv(bus); |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| u32 val; |
| |
| if (fsl_pcie_addr_valid(pcie, bdf)) { |
| *valuep = pci_get_ff(size); |
| return 0; |
| } |
| |
| bdf = bdf - PCI_BDF(bus->seq, 0, 0); |
| val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; |
| out_be32(®s->cfg_addr, val); |
| |
| sync(); |
| |
| switch (size) { |
| case PCI_SIZE_8: |
| *valuep = in_8((u8 *)®s->cfg_data + (offset & 3)); |
| break; |
| case PCI_SIZE_16: |
| *valuep = in_le16((u16 *)((u8 *)®s->cfg_data + |
| (offset & 2))); |
| break; |
| case PCI_SIZE_32: |
| *valuep = in_le32(®s->cfg_data); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_write_config(struct udevice *bus, pci_dev_t bdf, |
| uint offset, ulong value, |
| enum pci_size_t size) |
| { |
| struct fsl_pcie *pcie = dev_get_priv(bus); |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| u32 val; |
| u8 val_8; |
| u16 val_16; |
| u32 val_32; |
| |
| if (fsl_pcie_addr_valid(pcie, bdf)) |
| return 0; |
| |
| bdf = bdf - PCI_BDF(bus->seq, 0, 0); |
| val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; |
| out_be32(®s->cfg_addr, val); |
| |
| sync(); |
| |
| switch (size) { |
| case PCI_SIZE_8: |
| val_8 = value; |
| out_8((u8 *)®s->cfg_data + (offset & 3), val_8); |
| break; |
| case PCI_SIZE_16: |
| val_16 = value; |
| out_le16((u16 *)((u8 *)®s->cfg_data + (offset & 2)), val_16); |
| break; |
| case PCI_SIZE_32: |
| val_32 = value; |
| out_le32(®s->cfg_data, val_32); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_hose_read_config(struct fsl_pcie *pcie, uint offset, |
| ulong *valuep, enum pci_size_t size) |
| { |
| int ret; |
| struct udevice *bus = pcie->bus; |
| |
| ret = fsl_pcie_read_config(bus, PCI_BDF(bus->seq, 0, 0), |
| offset, valuep, size); |
| |
| return ret; |
| } |
| |
| static int fsl_pcie_hose_write_config(struct fsl_pcie *pcie, uint offset, |
| ulong value, enum pci_size_t size) |
| { |
| struct udevice *bus = pcie->bus; |
| |
| return fsl_pcie_write_config(bus, PCI_BDF(bus->seq, 0, 0), |
| offset, value, size); |
| } |
| |
| static int fsl_pcie_hose_read_config_byte(struct fsl_pcie *pcie, uint offset, |
| u8 *valuep) |
| { |
| ulong val; |
| int ret; |
| |
| ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_8); |
| *valuep = val; |
| |
| return ret; |
| } |
| |
| static int fsl_pcie_hose_read_config_word(struct fsl_pcie *pcie, uint offset, |
| u16 *valuep) |
| { |
| ulong val; |
| int ret; |
| |
| ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_16); |
| *valuep = val; |
| |
| return ret; |
| } |
| |
| static int fsl_pcie_hose_read_config_dword(struct fsl_pcie *pcie, uint offset, |
| u32 *valuep) |
| { |
| ulong val; |
| int ret; |
| |
| ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_32); |
| *valuep = val; |
| |
| return ret; |
| } |
| |
| static int fsl_pcie_hose_write_config_byte(struct fsl_pcie *pcie, uint offset, |
| u8 value) |
| { |
| return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_8); |
| } |
| |
| static int fsl_pcie_hose_write_config_word(struct fsl_pcie *pcie, uint offset, |
| u16 value) |
| { |
| return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_16); |
| } |
| |
| static int fsl_pcie_hose_write_config_dword(struct fsl_pcie *pcie, uint offset, |
| u32 value) |
| { |
| return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_32); |
| } |
| |
| static int fsl_pcie_link_up(struct fsl_pcie *pcie) |
| { |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| u16 ltssm; |
| |
| if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) { |
| ltssm = (in_be32(®s->pex_csr0) |
| & PEX_CSR0_LTSSM_MASK) >> PEX_CSR0_LTSSM_SHIFT; |
| return ltssm == LTSSM_L0_REV3; |
| } |
| |
| fsl_pcie_hose_read_config_word(pcie, PCI_LTSSM, <ssm); |
| |
| return ltssm == LTSSM_L0; |
| } |
| |
| static bool fsl_pcie_is_agent(struct fsl_pcie *pcie) |
| { |
| u8 header_type; |
| |
| fsl_pcie_hose_read_config_byte(pcie, PCI_HEADER_TYPE, &header_type); |
| |
| return (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL; |
| } |
| |
| static int fsl_pcie_setup_law(struct fsl_pcie *pcie) |
| { |
| struct pci_region *io, *mem, *pref; |
| |
| pci_get_regions(pcie->bus, &io, &mem, &pref); |
| |
| if (mem) |
| set_next_law(mem->phys_start, |
| law_size_bits(mem->size), |
| pcie->law_trgt_if); |
| |
| if (io) |
| set_next_law(io->phys_start, |
| law_size_bits(io->size), |
| pcie->law_trgt_if); |
| |
| return 0; |
| } |
| |
| static void fsl_pcie_config_ready(struct fsl_pcie *pcie) |
| { |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| |
| if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) { |
| setbits_be32(®s->config, FSL_PCIE_V3_CFG_RDY); |
| return; |
| } |
| |
| fsl_pcie_hose_write_config_byte(pcie, FSL_PCIE_CFG_RDY, 0x1); |
| } |
| |
| static int fsl_pcie_setup_outbound_win(struct fsl_pcie *pcie, int idx, |
| int type, u64 phys, u64 bus_addr, |
| pci_size_t size) |
| { |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| pot_t *po = ®s->pot[idx]; |
| u32 war, sz; |
| |
| if (idx < 0) |
| return -EINVAL; |
| |
| out_be32(&po->powbar, phys >> 12); |
| out_be32(&po->potar, bus_addr >> 12); |
| #ifdef CONFIG_SYS_PCI_64BIT |
| out_be32(&po->potear, bus_addr >> 44); |
| #else |
| out_be32(&po->potear, 0); |
| #endif |
| |
| sz = (__ilog2_u64((u64)size) - 1); |
| war = POWAR_EN | sz; |
| |
| if (type == PCI_REGION_IO) |
| war |= POWAR_IO_READ | POWAR_IO_WRITE; |
| else |
| war |= POWAR_MEM_READ | POWAR_MEM_WRITE; |
| |
| out_be32(&po->powar, war); |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_setup_inbound_win(struct fsl_pcie *pcie, int idx, |
| bool pf, u64 phys, u64 bus_addr, |
| pci_size_t size) |
| { |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| pit_t *pi = ®s->pit[idx]; |
| u32 sz = (__ilog2_u64(size) - 1); |
| u32 flag = PIWAR_LOCAL; |
| |
| if (idx < 0) |
| return -EINVAL; |
| |
| out_be32(&pi->pitar, phys >> 12); |
| out_be32(&pi->piwbar, bus_addr >> 12); |
| |
| #ifdef CONFIG_SYS_PCI_64BIT |
| out_be32(&pi->piwbear, bus_addr >> 44); |
| #else |
| out_be32(&pi->piwbear, 0); |
| #endif |
| |
| if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A005434)) |
| flag = 0; |
| |
| flag |= PIWAR_EN | PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP; |
| if (pf) |
| flag |= PIWAR_PF; |
| out_be32(&pi->piwar, flag | sz); |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_setup_outbound_wins(struct fsl_pcie *pcie) |
| { |
| struct pci_region *io, *mem, *pref; |
| int idx = 1; /* skip 0 */ |
| |
| pci_get_regions(pcie->bus, &io, &mem, &pref); |
| |
| if (io) |
| /* ATU : OUTBOUND : IO */ |
| fsl_pcie_setup_outbound_win(pcie, idx++, |
| PCI_REGION_IO, |
| io->phys_start, |
| io->bus_start, |
| io->size); |
| |
| if (mem) |
| /* ATU : OUTBOUND : MEM */ |
| fsl_pcie_setup_outbound_win(pcie, idx++, |
| PCI_REGION_MEM, |
| mem->phys_start, |
| mem->bus_start, |
| mem->size); |
| return 0; |
| } |
| |
| static int fsl_pcie_setup_inbound_wins(struct fsl_pcie *pcie) |
| { |
| phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS; |
| pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS; |
| u64 sz = min((u64)gd->ram_size, (1ull << 32)); |
| pci_size_t pci_sz; |
| int idx; |
| |
| if (pcie->block_rev >= PEX_IP_BLK_REV_2_2) |
| idx = 2; |
| else |
| idx = 3; |
| |
| pci_sz = 1ull << __ilog2_u64(sz); |
| |
| dev_dbg(pcie->bus, "R0 bus_start: %llx phys_start: %llx size: %llx\n", |
| (u64)bus_start, (u64)phys_start, (u64)sz); |
| |
| /* if we aren't an exact power of two match, pci_sz is smaller |
| * round it up to the next power of two. We report the actual |
| * size to pci region tracking. |
| */ |
| if (pci_sz != sz) |
| sz = 2ull << __ilog2_u64(sz); |
| |
| fsl_pcie_setup_inbound_win(pcie, idx--, true, |
| CONFIG_SYS_PCI_MEMORY_PHYS, |
| CONFIG_SYS_PCI_MEMORY_BUS, sz); |
| #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT) |
| /* |
| * On 64-bit capable systems, set up a mapping for all of DRAM |
| * in high pci address space. |
| */ |
| pci_sz = 1ull << __ilog2_u64(gd->ram_size); |
| /* round up to the next largest power of two */ |
| if (gd->ram_size > pci_sz) |
| pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1); |
| |
| dev_dbg(pcie->bus, "R64 bus_start: %llx phys_start: %llx size: %llx\n", |
| (u64)CONFIG_SYS_PCI64_MEMORY_BUS, |
| (u64)CONFIG_SYS_PCI_MEMORY_PHYS, (u64)pci_sz); |
| |
| fsl_pcie_setup_inbound_win(pcie, idx--, true, |
| CONFIG_SYS_PCI_MEMORY_PHYS, |
| CONFIG_SYS_PCI64_MEMORY_BUS, pci_sz); |
| #endif |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_init_atmu(struct fsl_pcie *pcie) |
| { |
| fsl_pcie_setup_outbound_wins(pcie); |
| fsl_pcie_setup_inbound_wins(pcie); |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_init_port(struct fsl_pcie *pcie) |
| { |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| u32 val_32; |
| u16 val_16; |
| |
| fsl_pcie_init_atmu(pcie); |
| |
| if (IS_ENABLED(CONFIG_FSL_PCIE_DISABLE_ASPM)) { |
| val_32 = 0; |
| fsl_pcie_hose_read_config_dword(pcie, PCI_LCR, &val_32); |
| val_32 &= ~0x03; |
| fsl_pcie_hose_write_config_dword(pcie, PCI_LCR, val_32); |
| udelay(1); |
| } |
| |
| if (IS_ENABLED(CONFIG_FSL_PCIE_RESET)) { |
| u16 ltssm; |
| int i; |
| |
| if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) { |
| /* assert PCIe reset */ |
| setbits_be32(®s->pdb_stat, 0x08000000); |
| (void)in_be32(®s->pdb_stat); |
| udelay(1000); |
| /* clear PCIe reset */ |
| clrbits_be32(®s->pdb_stat, 0x08000000); |
| asm("sync;isync"); |
| for (i = 0; i < 100 && !fsl_pcie_link_up(pcie); i++) |
| udelay(1000); |
| } else { |
| fsl_pcie_hose_read_config_word(pcie, PCI_LTSSM, <ssm); |
| if (ltssm == 1) { |
| /* assert PCIe reset */ |
| setbits_be32(®s->pdb_stat, 0x08000000); |
| (void)in_be32(®s->pdb_stat); |
| udelay(100); |
| /* clear PCIe reset */ |
| clrbits_be32(®s->pdb_stat, 0x08000000); |
| asm("sync;isync"); |
| for (i = 0; i < 100 && |
| !fsl_pcie_link_up(pcie); i++) |
| udelay(1000); |
| } |
| } |
| } |
| |
| if (IS_ENABLED(CONFIG_SYS_P4080_ERRATUM_PCIE_A003) && |
| !fsl_pcie_link_up(pcie)) { |
| serdes_corenet_t *srds_regs; |
| |
| srds_regs = (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR; |
| val_32 = in_be32(&srds_regs->srdspccr0); |
| |
| if ((val_32 >> 28) == 3) { |
| int i; |
| |
| out_be32(&srds_regs->srdspccr0, 2 << 28); |
| setbits_be32(®s->pdb_stat, 0x08000000); |
| in_be32(®s->pdb_stat); |
| udelay(100); |
| clrbits_be32(®s->pdb_stat, 0x08000000); |
| asm("sync;isync"); |
| for (i = 0; i < 100 && !fsl_pcie_link_up(pcie); i++) |
| udelay(1000); |
| } |
| } |
| |
| /* |
| * The Read-Only Write Enable bit defaults to 1 instead of 0. |
| * Set to 0 to protect the read-only registers. |
| */ |
| if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A007815)) |
| clrbits_be32(®s->dbi_ro_wr_en, 0x01); |
| |
| /* |
| * Enable All Error Interrupts except |
| * - Master abort (pci) |
| * - Master PERR (pci) |
| * - ICCA (PCIe) |
| */ |
| out_be32(®s->peer, ~0x20140); |
| |
| /* set URR, FER, NFER (but not CER) */ |
| fsl_pcie_hose_read_config_dword(pcie, PCI_DCR, &val_32); |
| val_32 |= 0xf000e; |
| fsl_pcie_hose_write_config_dword(pcie, PCI_DCR, val_32); |
| |
| /* Clear all error indications */ |
| out_be32(®s->pme_msg_det, 0xffffffff); |
| out_be32(®s->pme_msg_int_en, 0xffffffff); |
| out_be32(®s->pedr, 0xffffffff); |
| |
| fsl_pcie_hose_read_config_word(pcie, PCI_DSR, &val_16); |
| if (val_16) |
| fsl_pcie_hose_write_config_word(pcie, PCI_DSR, 0xffff); |
| |
| fsl_pcie_hose_read_config_word(pcie, PCI_SEC_STATUS, &val_16); |
| if (val_16) |
| fsl_pcie_hose_write_config_word(pcie, PCI_SEC_STATUS, 0xffff); |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_fixup_classcode(struct fsl_pcie *pcie) |
| { |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| u32 val; |
| |
| setbits_be32(®s->dbi_ro_wr_en, 0x01); |
| fsl_pcie_hose_read_config_dword(pcie, PCI_CLASS_REVISION, &val); |
| val &= 0xff; |
| val |= PCI_CLASS_BRIDGE_PCI << 16; |
| fsl_pcie_hose_write_config_dword(pcie, PCI_CLASS_REVISION, val); |
| clrbits_be32(®s->dbi_ro_wr_en, 0x01); |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_init_rc(struct fsl_pcie *pcie) |
| { |
| return fsl_pcie_fixup_classcode(pcie); |
| } |
| |
| static int fsl_pcie_init_ep(struct fsl_pcie *pcie) |
| { |
| fsl_pcie_config_ready(pcie); |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_probe(struct udevice *dev) |
| { |
| struct fsl_pcie *pcie = dev_get_priv(dev); |
| ccsr_fsl_pci_t *regs = pcie->regs; |
| u16 val_16; |
| |
| pcie->bus = dev; |
| pcie->block_rev = in_be32(®s->block_rev1); |
| |
| list_add(&pcie->list, &fsl_pcie_list); |
| pcie->enabled = is_serdes_configured(PCIE1 + pcie->idx); |
| if (!pcie->enabled) { |
| printf("PCIe%d: %s disabled\n", pcie->idx, dev->name); |
| return 0; |
| } |
| |
| fsl_pcie_setup_law(pcie); |
| |
| pcie->mode = fsl_pcie_is_agent(pcie); |
| |
| fsl_pcie_init_port(pcie); |
| |
| printf("PCIe%d: %s ", pcie->idx, dev->name); |
| |
| if (pcie->mode) { |
| printf("Endpoint"); |
| fsl_pcie_init_ep(pcie); |
| } else { |
| printf("Root Complex"); |
| fsl_pcie_init_rc(pcie); |
| } |
| |
| if (!fsl_pcie_link_up(pcie)) { |
| printf(": %s\n", pcie->mode ? "undetermined link" : "no link"); |
| return 0; |
| } |
| |
| fsl_pcie_hose_read_config_word(pcie, PCI_LSR, &val_16); |
| printf(": x%d gen%d\n", (val_16 & 0x3f0) >> 4, (val_16 & 0xf)); |
| |
| return 0; |
| } |
| |
| static int fsl_pcie_ofdata_to_platdata(struct udevice *dev) |
| { |
| struct fsl_pcie *pcie = dev_get_priv(dev); |
| int ret; |
| |
| pcie->regs = dev_remap_addr(dev); |
| if (!pcie->regs) { |
| pr_err("\"reg\" resource not found\n"); |
| return -EINVAL; |
| } |
| |
| ret = dev_read_u32(dev, "law_trgt_if", &pcie->law_trgt_if); |
| if (ret < 0) { |
| pr_err("\"law_trgt_if\" not found\n"); |
| return ret; |
| } |
| |
| pcie->idx = (dev_read_addr(dev) - 0xffe240000) / 0x10000; |
| |
| return 0; |
| } |
| |
| static const struct dm_pci_ops fsl_pcie_ops = { |
| .read_config = fsl_pcie_read_config, |
| .write_config = fsl_pcie_write_config, |
| }; |
| |
| static const struct udevice_id fsl_pcie_ids[] = { |
| { .compatible = "fsl,pcie-t2080" }, |
| { } |
| }; |
| |
| U_BOOT_DRIVER(fsl_pcie) = { |
| .name = "fsl_pcie", |
| .id = UCLASS_PCI, |
| .of_match = fsl_pcie_ids, |
| .ops = &fsl_pcie_ops, |
| .ofdata_to_platdata = fsl_pcie_ofdata_to_platdata, |
| .probe = fsl_pcie_probe, |
| .priv_auto_alloc_size = sizeof(struct fsl_pcie), |
| }; |