Lines Matching +full:pci +full:- +full:r8a7790
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>
28 #include <linux/pci.h>
33 #include "pcie-rcar.h"
64 ret = -EINVAL; in rcar_pcie_wakeup()
108 " .arch armv7-a\n" \
130 : "+r"(error):"r"(val), "r"(pcie->base + reg) : "memory"); in rcar_pci_write_reg_workaround()
144 : "+r"(error), "=r"(*val) : "r"(pcie->base + reg) : "memory"); in rcar_pci_read_reg_workaround()
154 /* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
159 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_config_access()
164 ret = rcar_pcie_wakeup(pcie->dev, pcie->base); in rcar_pcie_config_access()
176 * While each channel has its own memory-mapped extended config in rcar_pcie_config_access()
184 * the same channel <-> device access works for any PCI_SLOT() in rcar_pcie_config_access()
186 * space to devfn 0 in order to enable self-enumeration. In this in rcar_pcie_config_access()
206 rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | in rcar_pcie_config_access()
210 if (pci_is_root_bus(bus->parent)) in rcar_pcie_config_access()
238 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_read_conf()
251 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()
252 bus->number, devfn, where, size, *val); in rcar_pcie_read_conf()
257 /* Serialization is provided by 'pci_lock' in drivers/pci/access.c */
261 struct rcar_pcie_host *host = bus->sysdata; in rcar_pcie_write_conf()
271 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()
272 bus->number, devfn, where, size, val); in rcar_pcie_write_conf()
298 struct device *dev = pcie->dev; in rcar_pcie_force_speedup()
328 while (timeout--) { in rcar_pcie_force_speedup()
352 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_hw_enable()
361 /* Setup PCI resources */ in rcar_pcie_hw_enable()
362 resource_list_for_each_entry(win, &bridge->windows) { in rcar_pcie_hw_enable()
363 struct resource *res = win->res; in rcar_pcie_hw_enable()
365 if (!res->flags) in rcar_pcie_hw_enable()
386 bridge->sysdata = host; in rcar_pcie_enable()
387 bridge->ops = &rcar_pcie_ops; in rcar_pcie_enable()
394 struct device *dev = pcie->dev; in phy_wait_for_ack()
397 while (timeout--) { in phy_wait_for_ack()
406 return -ETIMEDOUT; in phy_wait_for_ack()
489 /* Finish initialization - establish a PCI Express link */ in rcar_pcie_hw_init()
507 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_h1()
532 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_phy_init_gen2()
535 * These settings come from the R-Car Series, 2nd Generation User's in rcar_pcie_phy_init_gen2()
556 err = phy_init(host->phy); in rcar_pcie_phy_init_gen3()
560 err = phy_power_on(host->phy); in rcar_pcie_phy_init_gen3()
562 phy_exit(host->phy); in rcar_pcie_phy_init_gen3()
570 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_msi_irq()
571 struct rcar_msi *msi = &host->msi; in rcar_pcie_msi_irq()
572 struct device *dev = pcie->dev; in rcar_pcie_msi_irq()
577 /* MSI & INTx share an interrupt - we only handle MSI here */ in rcar_pcie_msi_irq()
585 ret = generic_handle_domain_irq(msi->domain->parent, index); in rcar_pcie_msi_irq()
626 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_ack()
629 rcar_pci_write_reg(pcie, BIT(d->hwirq), PCIEMSIFR); in rcar_msi_irq_ack()
635 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_mask()
639 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_mask()
641 value &= ~BIT(d->hwirq); in rcar_msi_irq_mask()
643 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_mask()
649 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_msi_irq_unmask()
653 spin_lock_irqsave(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
655 value |= BIT(d->hwirq); in rcar_msi_irq_unmask()
657 spin_unlock_irqrestore(&msi->mask_lock, flags); in rcar_msi_irq_unmask()
662 return -EINVAL; in rcar_msi_set_affinity()
668 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_compose_msi_msg()
670 msg->address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; in rcar_compose_msi_msg()
671 msg->address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); in rcar_compose_msi_msg()
672 msg->data = data->hwirq; in rcar_compose_msi_msg()
676 .name = "R-Car MSI",
687 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_alloc()
691 mutex_lock(&msi->map_lock); in rcar_msi_domain_alloc()
693 hwirq = bitmap_find_free_region(msi->used, INT_PCI_MSI_NR, order_base_2(nr_irqs)); in rcar_msi_domain_alloc()
695 mutex_unlock(&msi->map_lock); in rcar_msi_domain_alloc()
698 return -ENOSPC; in rcar_msi_domain_alloc()
702 &rcar_msi_bottom_chip, domain->host_data, in rcar_msi_domain_alloc()
712 struct rcar_msi *msi = domain->host_data; in rcar_msi_domain_free()
714 mutex_lock(&msi->map_lock); in rcar_msi_domain_free()
716 bitmap_release_region(msi->used, d->hwirq, order_base_2(nr_irqs)); in rcar_msi_domain_free()
718 mutex_unlock(&msi->map_lock); in rcar_msi_domain_free()
734 struct rcar_pcie *pcie = &msi_to_host(msi)->pcie; in rcar_allocate_domains()
735 struct fwnode_handle *fwnode = dev_fwnode(pcie->dev); in rcar_allocate_domains()
741 dev_err(pcie->dev, "failed to create IRQ domain\n"); in rcar_allocate_domains()
742 return -ENOMEM; in rcar_allocate_domains()
746 msi->domain = pci_msi_create_irq_domain(fwnode, &rcar_msi_info, parent); in rcar_allocate_domains()
747 if (!msi->domain) { in rcar_allocate_domains()
748 dev_err(pcie->dev, "failed to create MSI domain\n"); in rcar_allocate_domains()
750 return -ENOMEM; in rcar_allocate_domains()
758 struct irq_domain *parent = msi->domain->parent; in rcar_free_domains()
760 irq_domain_remove(msi->domain); in rcar_free_domains()
766 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_enable_msi()
767 struct device *dev = pcie->dev; in rcar_pcie_enable_msi()
768 struct rcar_msi *msi = &host->msi; in rcar_pcie_enable_msi()
772 mutex_init(&msi->map_lock); in rcar_pcie_enable_msi()
773 spin_lock_init(&msi->mask_lock); in rcar_pcie_enable_msi()
775 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_enable_msi()
783 /* Two irqs are for MSI, but they are also used for non-MSI irqs */ in rcar_pcie_enable_msi()
784 err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
792 err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, in rcar_pcie_enable_msi()
805 * is guaranteed to be in the low 32bit range on any R-Car HW. in rcar_pcie_enable_msi()
819 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_teardown_msi()
827 rcar_free_domains(&host->msi); in rcar_pcie_teardown_msi()
832 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_get_resources()
833 struct device *dev = pcie->dev; in rcar_pcie_get_resources()
837 host->phy = devm_phy_optional_get(dev, "pcie"); in rcar_pcie_get_resources()
838 if (IS_ERR(host->phy)) in rcar_pcie_get_resources()
839 return PTR_ERR(host->phy); in rcar_pcie_get_resources()
841 err = of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_get_resources()
845 pcie->base = devm_ioremap_resource(dev, &res); in rcar_pcie_get_resources()
846 if (IS_ERR(pcie->base)) in rcar_pcie_get_resources()
847 return PTR_ERR(pcie->base); in rcar_pcie_get_resources()
849 host->bus_clk = devm_clk_get(dev, "pcie_bus"); in rcar_pcie_get_resources()
850 if (IS_ERR(host->bus_clk)) { in rcar_pcie_get_resources()
852 return PTR_ERR(host->bus_clk); in rcar_pcie_get_resources()
855 i = irq_of_parse_and_map(dev->of_node, 0); in rcar_pcie_get_resources()
858 err = -ENOENT; in rcar_pcie_get_resources()
861 host->msi.irq1 = i; in rcar_pcie_get_resources()
863 i = irq_of_parse_and_map(dev->of_node, 1); in rcar_pcie_get_resources()
866 err = -ENOENT; in rcar_pcie_get_resources()
869 host->msi.irq2 = i; in rcar_pcie_get_resources()
874 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_get_resources()
883 u64 restype = entry->res->flags; in rcar_pcie_inbound_ranges()
884 u64 cpu_addr = entry->res->start; in rcar_pcie_inbound_ranges()
885 u64 cpu_end = entry->res->end; in rcar_pcie_inbound_ranges()
886 u64 pci_addr = entry->res->start - entry->offset; in rcar_pcie_inbound_ranges()
889 u64 size = resource_size(entry->res); in rcar_pcie_inbound_ranges()
896 if (idx >= MAX_NR_INBOUND_MAPS - 1) { in rcar_pcie_inbound_ranges()
897 dev_err(pcie->dev, "Failed to map inbound regions!\n"); in rcar_pcie_inbound_ranges()
898 return -EINVAL; in rcar_pcie_inbound_ranges()
914 mask = roundup_pow_of_two(size) - 1; in rcar_pcie_inbound_ranges()
935 resource_list_for_each_entry(entry, &bridge->dma_ranges) { in rcar_pcie_parse_map_dma_ranges()
936 err = rcar_pcie_inbound_ranges(&host->pcie, entry, &index); in rcar_pcie_parse_map_dma_ranges()
945 { .compatible = "renesas,pcie-r8a7779",
947 { .compatible = "renesas,pcie-r8a7790",
949 { .compatible = "renesas,pcie-r8a7791",
951 { .compatible = "renesas,pcie-rcar-gen2",
953 { .compatible = "renesas,pcie-r8a7795",
955 { .compatible = "renesas,pcie-rcar-gen3",
962 struct device *dev = &pdev->dev; in rcar_pcie_probe()
971 return -ENOMEM; in rcar_pcie_probe()
974 pcie = &host->pcie; in rcar_pcie_probe()
975 pcie->dev = dev; in rcar_pcie_probe()
978 pm_runtime_enable(pcie->dev); in rcar_pcie_probe()
979 err = pm_runtime_get_sync(pcie->dev); in rcar_pcie_probe()
981 dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); in rcar_pcie_probe()
991 err = clk_prepare_enable(host->bus_clk); in rcar_pcie_probe()
1001 host->phy_init_fn = of_device_get_match_data(dev); in rcar_pcie_probe()
1002 err = host->phy_init_fn(host); in rcar_pcie_probe()
1011 err = -ENODEV; in rcar_pcie_probe()
1039 if (host->phy) { in rcar_pcie_probe()
1040 phy_power_off(host->phy); in rcar_pcie_probe()
1041 phy_exit(host->phy); in rcar_pcie_probe()
1045 clk_disable_unprepare(host->bus_clk); in rcar_pcie_probe()
1048 irq_dispose_mapping(host->msi.irq2); in rcar_pcie_probe()
1049 irq_dispose_mapping(host->msi.irq1); in rcar_pcie_probe()
1061 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume()
1070 err = host->phy_init_fn(host); in rcar_pcie_resume()
1084 of_address_to_resource(dev->of_node, 0, &res); in rcar_pcie_resume()
1088 bitmap_to_arr32(&val, host->msi.used, INT_PCI_MSI_NR); in rcar_pcie_resume()
1100 struct rcar_pcie *pcie = &host->pcie; in rcar_pcie_resume_noirq()
1106 /* Re-establish the PCIe link */ in rcar_pcie_resume_noirq()
1119 .name = "rcar-pcie",
1135 { .compatible = "renesas,pcie-r8a7779" },
1136 { .compatible = "renesas,pcie-r8a7790" },
1137 { .compatible = "renesas,pcie-r8a7791" },
1138 { .compatible = "renesas,pcie-rcar-gen2" },