Lines Matching +full:pci +full:- +full:rcar +full:- +full:gen2
1 // SPDX-License-Identifier: GPL-2.0
3 * PCIe driver for Renesas R-Car SoCs
4 * Copyright (C) 2014-2020 Renesas Electronics Europe Ltd
7 * arch/sh/drivers/pci/pcie-sh7786.c
8 * arch/sh/drivers/pci/ops-sh7786.c
9 * Copyright (C) 2009 - 2011 Paul Mundt
16 #include <linux/clk-provider.h>
20 #include <linux/irqchip/irq-msi-lib.h>
29 #include <linux/pci.h>
35 #include "pcie-rcar.h"
66 ret = -EINVAL; in rcar_pcie_wakeup()
110 " .arch armv7-a\n" \
132 : "+r"(error):"r"(val), "r"(pcie->base + reg) : "memory"); in rcar_pci_write_reg_workaround()
146 : "+r"(error), "=r"(*val) : "r"(pcie->base + reg) : "memory"); in rcar_pci_read_reg_workaround()
156 /* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
161 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_config_access()
166 ret = rcar_pcie_wakeup(pcie->dev, pcie->base); in rcar_pcie_config_access()
178 * While each channel has its own memory-mapped extended config in rcar_pcie_config_access()
182 * controller-initiated target transfer to its own config space in rcar_pcie_config_access()
186 * the same channel <-> device access works for any PCI_SLOT() in rcar_pcie_config_access()
188 * space to devfn 0 in order to enable self-enumeration. In this in rcar_pcie_config_access()
208 rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | in rcar_pcie_config_access()
212 if (pci_is_root_bus(bus->parent)) in rcar_pcie_config_access()
240 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_read_conf()
253 dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", in rcar_pcie_read_conf()
254 bus->number, devfn, where, size, *val); in rcar_pcie_read_conf()
259 /* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
263 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_write_conf()
273 dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", in rcar_pcie_write_conf()
274 bus->number, devfn, where, size, val); in rcar_pcie_write_conf()
300 struct device *dev = pcie->dev; in rcar_pcie_force_speedup()
330 while (timeout--) { in rcar_pcie_force_speedup()
354 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_hw_enable()
363 /* Setup PCI resources */ in rcar_pcie_hw_enable()
364 resource_list_for_each_entry(win, &bridge->windows) { in rcar_pcie_hw_enable()
365 struct resource *res = win->res; in rcar_pcie_hw_enable()
367 if (!res->flags) in rcar_pcie_hw_enable()
388 bridge->sysdata = host; in rcar_pcie_enable()
389 bridge->ops = &rcar_pcie_ops; in rcar_pcie_enable()
396 struct device *dev = pcie->dev; in phy_wait_for_ack()
399 while (timeout--) { in phy_wait_for_ack()
408 return -ETIMEDOUT; in phy_wait_for_ack()
491 /* Finish initialization - establish a PCI Express link */ in rcar_pcie_hw_init()
509 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_h1()
534 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_gen2()
537 * These settings come from the R-Car Series, 2nd Generation User's in rcar_pcie_phy_init_gen2()
558 err = phy_init(host->phy); in rcar_pcie_phy_init_gen3()
562 err = phy_power_on(host->phy); in rcar_pcie_phy_init_gen3()
564 phy_exit(host->phy); in rcar_pcie_phy_init_gen3()
572 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_msi_irq()
573 struct rcar_msi *msi = &host->msi; in rcar_pcie_msi_irq()
574 struct device *dev = pcie->dev; in rcar_pcie_msi_irq()
579 /* MSI & INTx share an interrupt - we only handle MSI here */ in rcar_pcie_msi_irq()
587 ret = generic_handle_domain_irq(msi->domain->parent, index); in rcar_pcie_msi_irq()
604 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_ack()
607 rcar_pci_write_reg(pcie, BIT(d->hwirq), PCIEMSIFR); in rcar_msi_irq_ack()
613 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_mask()
617 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_mask()
619 value &= ~BIT(d->hwirq); in rcar_msi_irq_mask()
621 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_mask()
627 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_unmask()
631 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
633 value |= BIT(d->hwirq); in rcar_msi_irq_unmask()
635 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
641 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_compose_msi_msg()
643 msg->address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; in rcar_compose_msi_msg()
644 msg->address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); in rcar_compose_msi_msg()
645 msg->data = data->hwirq; in rcar_compose_msi_msg()
649 .name = "R-Car MSI",
659 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_alloc()
663 mutex_lock(&msi->map_lock); in rcar_msi_domain_alloc()
665 hwirq = bitmap_find_free_region(msi->used, INT_PCI_MSI_NR, order_base_2(nr_irqs)); in rcar_msi_domain_alloc()
667 mutex_unlock(&msi->map_lock); in rcar_msi_domain_alloc()
670 return -ENOSPC; in rcar_msi_domain_alloc()
674 &rcar_msi_bottom_chip, domain->host_data, in rcar_msi_domain_alloc()
684 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_free()
686 mutex_lock(&msi->map_lock); in rcar_msi_domain_free()
688 bitmap_release_region(msi->used, d->hwirq, order_base_2(nr_irqs)); in rcar_msi_domain_free()
690 mutex_unlock(&msi->map_lock); in rcar_msi_domain_free()
711 .prefix = "RCAR-",
717 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_allocate_domains()
719 .fwnode = dev_fwnode(pcie->dev), in rcar_allocate_domains()
725 msi->domain = msi_create_parent_irq_domain(&info, &rcar_msi_parent_ops); in rcar_allocate_domains()
726 if (!msi->domain) { in rcar_allocate_domains()
727 dev_err(pcie->dev, "failed to create IRQ domain\n"); in rcar_allocate_domains()
728 return -ENOMEM; in rcar_allocate_domains()
736 irq_domain_remove(msi->domain); in rcar_free_domains()
741 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_enable_msi()
742 struct device *dev = pcie->dev; in rcar_pcie_enable_msi()
743 struct rcar_msi *msi = &host->msi; in rcar_pcie_enable_msi()
747 mutex_init(&msi->map_lock); in rcar_pcie_enable_msi()
748 spin_lock_init(&msi->mask_lock); in rcar_pcie_enable_msi()
750 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_enable_msi()
758 /* Two IRQs are for MSI, but they are also used for non-MSI IRQs */ in rcar_pcie_enable_msi()
759 err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
767 err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
780 * to be in the low 32bit range on any R-Car HW. in rcar_pcie_enable_msi()
794 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_teardown_msi()
802 rcar_free_domains(&host->msi); in rcar_pcie_teardown_msi()
807 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_get_resources()
808 struct device *dev = pcie->dev; in rcar_pcie_get_resources()
812 host->phy = devm_phy_optional_get(dev, "pcie"); in rcar_pcie_get_resources()
813 if (IS_ERR(host->phy)) in rcar_pcie_get_resources()
814 return PTR_ERR(host->phy); in rcar_pcie_get_resources()
816 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_get_resources()
820 pcie->base = devm_ioremap_resource(dev, &res); in rcar_pcie_get_resources()
821 if (IS_ERR(pcie->base)) in rcar_pcie_get_resources()
822 return PTR_ERR(pcie->base); in rcar_pcie_get_resources()
824 host->bus_clk = devm_clk_get(dev, "pcie_bus"); in rcar_pcie_get_resources()
825 if (IS_ERR(host->bus_clk)) { in rcar_pcie_get_resources()
827 return PTR_ERR(host->bus_clk); in rcar_pcie_get_resources()
830 i = irq_of_parse_and_map(dev->of_node, 0); in rcar_pcie_get_resources()
833 err = -ENOENT; in rcar_pcie_get_resources()
836 host->msi.irq1 = i; in rcar_pcie_get_resources()
838 i = irq_of_parse_and_map(dev->of_node, 1); in rcar_pcie_get_resources()
841 err = -ENOENT; in rcar_pcie_get_resources()
844 host->msi.irq2 = i; in rcar_pcie_get_resources()
849 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_get_resources()
858 u64 restype = entry->res->flags; in rcar_pcie_inbound_ranges()
859 u64 cpu_addr = entry->res->start; in rcar_pcie_inbound_ranges()
860 u64 cpu_end = entry->res->end; in rcar_pcie_inbound_ranges()
861 u64 pci_addr = entry->res->start - entry->offset; in rcar_pcie_inbound_ranges()
864 u64 size = resource_size(entry->res); in rcar_pcie_inbound_ranges()
871 if (idx >= MAX_NR_INBOUND_MAPS - 1) { in rcar_pcie_inbound_ranges()
872 dev_err(pcie->dev, "Failed to map inbound regions!\n"); in rcar_pcie_inbound_ranges()
873 return -EINVAL; in rcar_pcie_inbound_ranges()
891 mask = roundup_pow_of_two(size) - 1; in rcar_pcie_inbound_ranges()
912 resource_list_for_each_entry(entry, &bridge->dma_ranges) { in rcar_pcie_parse_map_dma_ranges()
913 err = rcar_pcie_inbound_ranges(&host->pcie, entry, &index); in rcar_pcie_parse_map_dma_ranges()
922 { .compatible = "renesas,pcie-r8a7779",
924 { .compatible = "renesas,pcie-r8a7790",
926 { .compatible = "renesas,pcie-r8a7791",
928 { .compatible = "renesas,pcie-rcar-gen2",
930 { .compatible = "renesas,pcie-r8a7795",
932 { .compatible = "renesas,pcie-rcar-gen3",
946 struct device *dev = &pdev->dev; in rcar_pcie_probe()
956 return -ENOMEM; in rcar_pcie_probe()
959 pcie = &host->pcie; in rcar_pcie_probe()
960 pcie->dev = dev; in rcar_pcie_probe()
965 if (err < 0 && err != -ENODEV) in rcar_pcie_probe()
970 pm_runtime_enable(pcie->dev); in rcar_pcie_probe()
971 err = pm_runtime_get_sync(pcie->dev); in rcar_pcie_probe()
973 dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); in rcar_pcie_probe()
983 err = clk_prepare_enable(host->bus_clk); in rcar_pcie_probe()
993 host->phy_init_fn = of_device_get_match_data(dev); in rcar_pcie_probe()
994 err = host->phy_init_fn(host); in rcar_pcie_probe()
1003 err = -ENODEV; in rcar_pcie_probe()
1031 if (host->phy) { in rcar_pcie_probe()
1032 phy_power_off(host->phy); in rcar_pcie_probe()
1033 phy_exit(host->phy); in rcar_pcie_probe()
1037 clk_disable_unprepare(host->bus_clk); in rcar_pcie_probe()
1040 irq_dispose_mapping(host->msi.irq2); in rcar_pcie_probe()
1041 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_probe()
1053 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume()
1062 err = host->phy_init_fn(host); in rcar_pcie_resume()
1076 of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_resume()
1080 bitmap_to_arr32(&val, host->msi.used, INT_PCI_MSI_NR); in rcar_pcie_resume()
1092 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume_noirq()
1098 /* Re-establish the PCIe link */ in rcar_pcie_resume_noirq()
1111 .name = "rcar-pcie",
1127 { .compatible = "renesas,pcie-r8a7779" },
1128 { .compatible = "renesas,pcie-r8a7790" },
1129 { .compatible = "renesas,pcie-r8a7791" },
1130 { .compatible = "renesas,pcie-rcar-gen2" },