diff options
Diffstat (limited to 'drivers/pci/controller/pcie-iproc-platform.c')
| -rw-r--r-- | drivers/pci/controller/pcie-iproc-platform.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/pci/controller/pcie-iproc-platform.c b/drivers/pci/controller/pcie-iproc-platform.c new file mode 100644 index 000000000..f30f5f3fb --- /dev/null +++ b/drivers/pci/controller/pcie-iproc-platform.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2015 Broadcom Corporation + */ + +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/clk.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/of_address.h> +#include <linux/of_pci.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/phy/phy.h> + +#include "../pci.h" +#include "pcie-iproc.h" + +static const struct of_device_id iproc_pcie_of_match_table[] = { + { + .compatible = "brcm,iproc-pcie", + .data = (int *)IPROC_PCIE_PAXB, + }, { + .compatible = "brcm,iproc-pcie-paxb-v2", + .data = (int *)IPROC_PCIE_PAXB_V2, + }, { + .compatible = "brcm,iproc-pcie-paxc", + .data = (int *)IPROC_PCIE_PAXC, + }, { + .compatible = "brcm,iproc-pcie-paxc-v2", + .data = (int *)IPROC_PCIE_PAXC_V2, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table); + +static int iproc_pcie_pltfm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct iproc_pcie *pcie; + struct device_node *np = dev->of_node; + struct resource reg; + resource_size_t iobase = 0; + LIST_HEAD(resources); + struct pci_host_bridge *bridge; + int ret; + + bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); + if (!bridge) + return -ENOMEM; + + pcie = pci_host_bridge_priv(bridge); + + pcie->dev = dev; + pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev); + + ret = of_address_to_resource(np, 0, ®); + if (ret < 0) { + dev_err(dev, "unable to obtain controller resources\n"); + return ret; + } + + pcie->base = devm_pci_remap_cfgspace(dev, reg.start, + resource_size(®)); + if (!pcie->base) { + dev_err(dev, "unable to map controller registers\n"); + return -ENOMEM; + } + pcie->base_addr = reg.start; + + if (of_property_read_bool(np, "brcm,pcie-ob")) { + u32 val; + + ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset", + &val); + if (ret) { + dev_err(dev, + "missing brcm,pcie-ob-axi-offset property\n"); + return ret; + } + pcie->ob.axi_offset = val; + pcie->need_ob_cfg = true; + } + + /* + * DT nodes are not used by all platforms that use the iProc PCIe + * core driver. For platforms that require explict inbound mapping + * configuration, "dma-ranges" would have been present in DT + */ + pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges"); + + /* PHY use is optional */ + pcie->phy = devm_phy_get(dev, "pcie-phy"); + if (IS_ERR(pcie->phy)) { + if (PTR_ERR(pcie->phy) == -EPROBE_DEFER) + return -EPROBE_DEFER; + pcie->phy = NULL; + } + + ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &resources, + &iobase); + if (ret) { + dev_err(dev, "unable to get PCI host bridge resources\n"); + return ret; + } + + /* PAXC doesn't support legacy IRQs, skip mapping */ + switch (pcie->type) { + case IPROC_PCIE_PAXC: + case IPROC_PCIE_PAXC_V2: + break; + default: + pcie->map_irq = of_irq_parse_and_map_pci; + } + + ret = iproc_pcie_setup(pcie, &resources); + if (ret) { + dev_err(dev, "PCIe controller setup failed\n"); + pci_free_resource_list(&resources); + return ret; + } + + platform_set_drvdata(pdev, pcie); + return 0; +} + +static int iproc_pcie_pltfm_remove(struct platform_device *pdev) +{ + struct iproc_pcie *pcie = platform_get_drvdata(pdev); + + return iproc_pcie_remove(pcie); +} + +static void iproc_pcie_pltfm_shutdown(struct platform_device *pdev) +{ + struct iproc_pcie *pcie = platform_get_drvdata(pdev); + + iproc_pcie_shutdown(pcie); +} + +static struct platform_driver iproc_pcie_pltfm_driver = { + .driver = { + .name = "iproc-pcie", + .of_match_table = of_match_ptr(iproc_pcie_of_match_table), + }, + .probe = iproc_pcie_pltfm_probe, + .remove = iproc_pcie_pltfm_remove, + .shutdown = iproc_pcie_pltfm_shutdown, +}; +module_platform_driver(iproc_pcie_pltfm_driver); + +MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>"); +MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver"); +MODULE_LICENSE("GPL v2"); |