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path: root/drivers/pci/host/pci-versatile.c
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Diffstat (limited to 'drivers/pci/host/pci-versatile.c')
-rw-r--r--drivers/pci/host/pci-versatile.c239
1 files changed, 0 insertions, 239 deletions
diff --git a/drivers/pci/host/pci-versatile.c b/drivers/pci/host/pci-versatile.c
deleted file mode 100644
index 994f32061b32..000000000000
--- a/drivers/pci/host/pci-versatile.c
+++ /dev/null
@@ -1,239 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright 2004 Koninklijke Philips Electronics NV
- *
- * Conversion to platform driver and DT:
- * Copyright 2014 Linaro Ltd.
- *
- * 14/04/2005 Initial version, colin.king@philips.com
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of_pci.h>
-#include <linux/of_platform.h>
-#include <linux/pci.h>
-#include <linux/platform_device.h>
-
-#include "../pci.h"
-
-static void __iomem *versatile_pci_base;
-static void __iomem *versatile_cfg_base[2];
-
-#define PCI_IMAP(m) (versatile_pci_base + ((m) * 4))
-#define PCI_SMAP(m) (versatile_pci_base + 0x14 + ((m) * 4))
-#define PCI_SELFID (versatile_pci_base + 0xc)
-
-#define VP_PCI_DEVICE_ID 0x030010ee
-#define VP_PCI_CLASS_ID 0x0b400000
-
-static u32 pci_slot_ignore;
-
-static int __init versatile_pci_slot_ignore(char *str)
-{
- int retval;
- int slot;
-
- while ((retval = get_option(&str, &slot))) {
- if ((slot < 0) || (slot > 31))
- pr_err("Illegal slot value: %d\n", slot);
- else
- pci_slot_ignore |= (1 << slot);
- }
- return 1;
-}
-__setup("pci_slot_ignore=", versatile_pci_slot_ignore);
-
-
-static void __iomem *versatile_map_bus(struct pci_bus *bus,
- unsigned int devfn, int offset)
-{
- unsigned int busnr = bus->number;
-
- if (pci_slot_ignore & (1 << PCI_SLOT(devfn)))
- return NULL;
-
- return versatile_cfg_base[1] + ((busnr << 16) | (devfn << 8) | offset);
-}
-
-static struct pci_ops pci_versatile_ops = {
- .map_bus = versatile_map_bus,
- .read = pci_generic_config_read32,
- .write = pci_generic_config_write,
-};
-
-static int versatile_pci_parse_request_of_pci_ranges(struct device *dev,
- struct list_head *res)
-{
- int err, mem = 1, res_valid = 0;
- resource_size_t iobase;
- struct resource_entry *win, *tmp;
-
- err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, res, &iobase);
- if (err)
- return err;
-
- err = devm_request_pci_bus_resources(dev, res);
- if (err)
- goto out_release_res;
-
- resource_list_for_each_entry_safe(win, tmp, res) {
- struct resource *res = win->res;
-
- switch (resource_type(res)) {
- case IORESOURCE_IO:
- err = pci_remap_iospace(res, iobase);
- if (err) {
- dev_warn(dev, "error %d: failed to map resource %pR\n",
- err, res);
- resource_list_destroy_entry(win);
- }
- break;
- case IORESOURCE_MEM:
- res_valid |= !(res->flags & IORESOURCE_PREFETCH);
-
- writel(res->start >> 28, PCI_IMAP(mem));
- writel(PHYS_OFFSET >> 28, PCI_SMAP(mem));
- mem++;
-
- break;
- }
- }
-
- if (res_valid)
- return 0;
-
- dev_err(dev, "non-prefetchable memory resource required\n");
- err = -EINVAL;
-
-out_release_res:
- pci_free_resource_list(res);
- return err;
-}
-
-static int versatile_pci_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct resource *res;
- int ret, i, myslot = -1;
- u32 val;
- void __iomem *local_pci_cfg_base;
- struct pci_bus *bus, *child;
- struct pci_host_bridge *bridge;
- LIST_HEAD(pci_res);
-
- bridge = devm_pci_alloc_host_bridge(dev, 0);
- if (!bridge)
- return -ENOMEM;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- versatile_pci_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(versatile_pci_base))
- return PTR_ERR(versatile_pci_base);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- versatile_cfg_base[0] = devm_ioremap_resource(dev, res);
- if (IS_ERR(versatile_cfg_base[0]))
- return PTR_ERR(versatile_cfg_base[0]);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
- versatile_cfg_base[1] = devm_pci_remap_cfg_resource(dev, res);
- if (IS_ERR(versatile_cfg_base[1]))
- return PTR_ERR(versatile_cfg_base[1]);
-
- ret = versatile_pci_parse_request_of_pci_ranges(dev, &pci_res);
- if (ret)
- return ret;
-
- /*
- * We need to discover the PCI core first to configure itself
- * before the main PCI probing is performed
- */
- for (i = 0; i < 32; i++) {
- if ((readl(versatile_cfg_base[0] + (i << 11) + PCI_VENDOR_ID) == VP_PCI_DEVICE_ID) &&
- (readl(versatile_cfg_base[0] + (i << 11) + PCI_CLASS_REVISION) == VP_PCI_CLASS_ID)) {
- myslot = i;
- break;
- }
- }
- if (myslot == -1) {
- dev_err(dev, "Cannot find PCI core!\n");
- return -EIO;
- }
- /*
- * Do not to map Versatile FPGA PCI device into memory space
- */
- pci_slot_ignore |= (1 << myslot);
-
- dev_info(dev, "PCI core found (slot %d)\n", myslot);
-
- writel(myslot, PCI_SELFID);
- local_pci_cfg_base = versatile_cfg_base[1] + (myslot << 11);
-
- val = readl(local_pci_cfg_base + PCI_COMMAND);
- val |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
- writel(val, local_pci_cfg_base + PCI_COMMAND);
-
- /*
- * Configure the PCI inbound memory windows to be 1:1 mapped to SDRAM
- */
- writel(PHYS_OFFSET, local_pci_cfg_base + PCI_BASE_ADDRESS_0);
- writel(PHYS_OFFSET, local_pci_cfg_base + PCI_BASE_ADDRESS_1);
- writel(PHYS_OFFSET, local_pci_cfg_base + PCI_BASE_ADDRESS_2);
-
- /*
- * For many years the kernel and QEMU were symbiotically buggy
- * in that they both assumed the same broken IRQ mapping.
- * QEMU therefore attempts to auto-detect old broken kernels
- * so that they still work on newer QEMU as they did on old
- * QEMU. Since we now use the correct (ie matching-hardware)
- * IRQ mapping we write a definitely different value to a
- * PCI_INTERRUPT_LINE register to tell QEMU that we expect
- * real hardware behaviour and it need not be backwards
- * compatible for us. This write is harmless on real hardware.
- */
- writel(0, versatile_cfg_base[0] + PCI_INTERRUPT_LINE);
-
- pci_add_flags(PCI_ENABLE_PROC_DOMAINS);
- pci_add_flags(PCI_REASSIGN_ALL_BUS);
-
- list_splice_init(&pci_res, &bridge->windows);
- bridge->dev.parent = dev;
- bridge->sysdata = NULL;
- bridge->busnr = 0;
- bridge->ops = &pci_versatile_ops;
- bridge->map_irq = of_irq_parse_and_map_pci;
- bridge->swizzle_irq = pci_common_swizzle;
-
- ret = pci_scan_root_bus_bridge(bridge);
- if (ret < 0)
- return ret;
-
- bus = bridge->bus;
-
- pci_assign_unassigned_bus_resources(bus);
- list_for_each_entry(child, &bus->children, node)
- pcie_bus_configure_settings(child);
- pci_bus_add_devices(bus);
-
- return 0;
-}
-
-static const struct of_device_id versatile_pci_of_match[] = {
- { .compatible = "arm,versatile-pci", },
- { },
-};
-MODULE_DEVICE_TABLE(of, versatile_pci_of_match);
-
-static struct platform_driver versatile_pci_driver = {
- .driver = {
- .name = "versatile-pci",
- .of_match_table = versatile_pci_of_match,
- .suppress_bind_attrs = true,
- },
- .probe = versatile_pci_probe,
-};
-module_platform_driver(versatile_pci_driver);
-
-MODULE_DESCRIPTION("Versatile PCI driver");
-MODULE_LICENSE("GPL v2");
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