2016-03-11 14:35:55 -07:00
|
|
|
/*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*
|
|
|
|
* Copyright (C) 2014 ARM Limited
|
|
|
|
*
|
|
|
|
* Author: Will Deacon <will.deacon@arm.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/of_address.h>
|
|
|
|
#include <linux/of_pci.h>
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
#include "../ecam.h"
|
2016-03-11 14:35:55 -07:00
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
static int gen_pci_parse_request_of_pci_ranges(struct device *dev,
|
|
|
|
struct list_head *resources, struct resource **bus_range)
|
2016-03-11 14:35:55 -07:00
|
|
|
{
|
|
|
|
int err, res_valid = 0;
|
|
|
|
struct device_node *np = dev->of_node;
|
|
|
|
resource_size_t iobase;
|
|
|
|
struct resource_entry *win;
|
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
err = of_pci_get_host_bridge_resources(np, 0, 0xff, resources, &iobase);
|
2016-03-11 14:35:55 -07:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
resource_list_for_each_entry(win, resources) {
|
2016-03-11 14:35:55 -07:00
|
|
|
struct resource *parent, *res = win->res;
|
|
|
|
|
|
|
|
switch (resource_type(res)) {
|
|
|
|
case IORESOURCE_IO:
|
|
|
|
parent = &ioport_resource;
|
|
|
|
err = pci_remap_iospace(res, iobase);
|
|
|
|
if (err) {
|
|
|
|
dev_warn(dev, "error %d: failed to map resource %pR\n",
|
|
|
|
err, res);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case IORESOURCE_MEM:
|
|
|
|
parent = &iomem_resource;
|
|
|
|
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
|
|
|
|
break;
|
|
|
|
case IORESOURCE_BUS:
|
2016-05-11 16:34:46 -06:00
|
|
|
*bus_range = res;
|
2016-03-11 14:35:55 -07:00
|
|
|
default:
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = devm_request_resource(dev, parent, res);
|
|
|
|
if (err)
|
|
|
|
goto out_release_res;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!res_valid) {
|
|
|
|
dev_err(dev, "non-prefetchable memory resource required\n");
|
|
|
|
err = -EINVAL;
|
|
|
|
goto out_release_res;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_release_res:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
static void gen_pci_unmap_cfg(void *ptr)
|
|
|
|
{
|
|
|
|
pci_ecam_free((struct pci_config_window *)ptr);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct pci_config_window *gen_pci_init(struct device *dev,
|
|
|
|
struct list_head *resources, struct pci_ecam_ops *ops)
|
2016-03-11 14:35:55 -07:00
|
|
|
{
|
|
|
|
int err;
|
2016-05-11 16:34:46 -06:00
|
|
|
struct resource cfgres;
|
|
|
|
struct resource *bus_range = NULL;
|
|
|
|
struct pci_config_window *cfg;
|
2016-03-11 14:35:55 -07:00
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
/* Parse our PCI ranges and request their resources */
|
|
|
|
err = gen_pci_parse_request_of_pci_ranges(dev, resources, &bus_range);
|
|
|
|
if (err)
|
|
|
|
goto err_out;
|
|
|
|
|
|
|
|
err = of_address_to_resource(dev->of_node, 0, &cfgres);
|
2016-03-11 14:35:55 -07:00
|
|
|
if (err) {
|
|
|
|
dev_err(dev, "missing \"reg\" property\n");
|
2016-05-11 16:34:46 -06:00
|
|
|
goto err_out;
|
2016-03-11 14:35:55 -07:00
|
|
|
}
|
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
cfg = pci_ecam_create(dev, &cfgres, bus_range, ops);
|
|
|
|
if (IS_ERR(cfg)) {
|
|
|
|
err = PTR_ERR(cfg);
|
|
|
|
goto err_out;
|
2016-03-11 14:35:55 -07:00
|
|
|
}
|
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
err = devm_add_action(dev, gen_pci_unmap_cfg, cfg);
|
|
|
|
if (err) {
|
|
|
|
gen_pci_unmap_cfg(cfg);
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
return cfg;
|
|
|
|
|
|
|
|
err_out:
|
|
|
|
pci_free_resource_list(resources);
|
|
|
|
return ERR_PTR(err);
|
2016-03-11 14:35:55 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
int pci_host_common_probe(struct platform_device *pdev,
|
2016-05-11 16:34:46 -06:00
|
|
|
struct pci_ecam_ops *ops)
|
2016-03-11 14:35:55 -07:00
|
|
|
{
|
|
|
|
const char *type;
|
|
|
|
struct device *dev = &pdev->dev;
|
|
|
|
struct device_node *np = dev->of_node;
|
|
|
|
struct pci_bus *bus, *child;
|
2016-05-11 16:34:46 -06:00
|
|
|
struct pci_config_window *cfg;
|
|
|
|
struct list_head resources;
|
2016-03-11 14:35:55 -07:00
|
|
|
|
|
|
|
type = of_get_property(np, "device_type", NULL);
|
|
|
|
if (!type || strcmp(type, "pci")) {
|
|
|
|
dev_err(dev, "invalid \"device_type\" %s\n", type);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
of_pci_check_probe_only();
|
|
|
|
|
|
|
|
/* Parse and map our Configuration Space windows */
|
2016-05-11 16:34:46 -06:00
|
|
|
INIT_LIST_HEAD(&resources);
|
|
|
|
cfg = gen_pci_init(dev, &resources, ops);
|
|
|
|
if (IS_ERR(cfg))
|
|
|
|
return PTR_ERR(cfg);
|
2016-03-11 14:35:55 -07:00
|
|
|
|
|
|
|
/* Do not reassign resources if probe only */
|
|
|
|
if (!pci_has_flag(PCI_PROBE_ONLY))
|
|
|
|
pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
|
|
|
|
|
2016-05-11 16:34:46 -06:00
|
|
|
bus = pci_scan_root_bus(dev, cfg->busr.start, &ops->pci_ops, cfg,
|
|
|
|
&resources);
|
2016-03-11 14:35:55 -07:00
|
|
|
if (!bus) {
|
|
|
|
dev_err(dev, "Scanning rootbus failed");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
|
|
|
|
|
|
|
|
if (!pci_has_flag(PCI_PROBE_ONLY)) {
|
|
|
|
pci_bus_size_bridges(bus);
|
|
|
|
pci_bus_assign_resources(bus);
|
|
|
|
|
|
|
|
list_for_each_entry(child, &bus->children, node)
|
|
|
|
pcie_bus_configure_settings(child);
|
|
|
|
}
|
|
|
|
|
|
|
|
pci_bus_add_devices(bus);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("Generic PCI host driver common code");
|
|
|
|
MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
|
|
|
|
MODULE_LICENSE("GPL v2");
|