Merge branch 'pci/host-designware' into pci/host-imx6
* pci/host-designware:
PCI: designware: Remove pci_assign_unassigned_resources() from dw_pcie_host_init()
PCI: designware: Use pci_create_root_bus() instead of pci_scan_root_bus()
PCI: designware: Parse bus-range property from devicetree
PCI: designware: Add support for v3.65 hardware
diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt
index ed0d9b9..9f4faa8 100644
--- a/Documentation/devicetree/bindings/pci/designware-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt
@@ -23,3 +23,6 @@
Optional properties:
- reset-gpio: gpio pin number of power good signal
+- bus-range: PCI bus numbers covered (it is recommended for new devicetrees to
+ specify this property, to keep backwards compatibility a range of 0x00-0xff
+ is assumed if not present)
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 52bd3a1..538bbf3 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -425,7 +425,7 @@
struct resource *cfg_res;
u32 val, na, ns;
const __be32 *addrp;
- int i, index;
+ int i, index, ret;
/* Find the address cell size and the number of cells in order to get
* the untranslated address.
@@ -500,6 +500,16 @@
}
}
+ ret = of_pci_parse_bus_range(np, &pp->busn);
+ if (ret < 0) {
+ pp->busn.name = np->name;
+ pp->busn.start = 0;
+ pp->busn.end = 0xff;
+ pp->busn.flags = IORESOURCE_BUS;
+ dev_dbg(pp->dev, "failed to parse bus-range property: %d, using default %pR\n",
+ ret, &pp->busn);
+ }
+
if (!pp->dbi_base) {
pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start,
resource_size(&pp->cfg));
@@ -511,17 +521,24 @@
pp->mem_base = pp->mem.start;
- pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
- pp->config.cfg0_size);
if (!pp->va_cfg0_base) {
- dev_err(pp->dev, "error with ioremap in function\n");
- return -ENOMEM;
+ pp->cfg0_base = pp->cfg.start;
+ pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
+ pp->config.cfg0_size);
+ if (!pp->va_cfg0_base) {
+ dev_err(pp->dev, "error with ioremap in function\n");
+ return -ENOMEM;
+ }
}
- pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base,
- pp->config.cfg1_size);
+
if (!pp->va_cfg1_base) {
- dev_err(pp->dev, "error with ioremap\n");
- return -ENOMEM;
+ pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size;
+ pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base,
+ pp->config.cfg1_size);
+ if (!pp->va_cfg1_base) {
+ dev_err(pp->dev, "error with ioremap\n");
+ return -ENOMEM;
+ }
}
if (of_property_read_u32(np, "num-lanes", &pp->lanes)) {
@@ -530,16 +547,22 @@
}
if (IS_ENABLED(CONFIG_PCI_MSI)) {
- pp->irq_domain = irq_domain_add_linear(pp->dev->of_node,
- MAX_MSI_IRQS, &msi_domain_ops,
- &dw_pcie_msi_chip);
- if (!pp->irq_domain) {
- dev_err(pp->dev, "irq domain init failed\n");
- return -ENXIO;
- }
+ if (!pp->ops->msi_host_init) {
+ pp->irq_domain = irq_domain_add_linear(pp->dev->of_node,
+ MAX_MSI_IRQS, &msi_domain_ops,
+ &dw_pcie_msi_chip);
+ if (!pp->irq_domain) {
+ dev_err(pp->dev, "irq domain init failed\n");
+ return -ENXIO;
+ }
- for (i = 0; i < MAX_MSI_IRQS; i++)
- irq_create_mapping(pp->irq_domain, i);
+ for (i = 0; i < MAX_MSI_IRQS; i++)
+ irq_create_mapping(pp->irq_domain, i);
+ } else {
+ ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip);
+ if (ret < 0)
+ return ret;
+ }
}
if (pp->ops->host_init)
@@ -558,7 +581,6 @@
dw_pci.private_data = (void **)&pp;
pci_common_init_dev(pp->dev, &dw_pci);
- pci_assign_unassigned_resources();
#ifdef CONFIG_PCI_DOMAINS
dw_pci.domain++;
#endif
@@ -781,6 +803,7 @@
sys->mem_offset = pp->mem.start - pp->config.mem_bus_addr;
pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset);
+ pci_add_resource(&sys->resources, &pp->busn);
return 1;
}
@@ -790,14 +813,16 @@
struct pci_bus *bus;
struct pcie_port *pp = sys_to_pcie(sys);
- if (pp) {
- pp->root_bus_nr = sys->busnr;
- bus = pci_scan_root_bus(pp->dev, sys->busnr, &dw_pcie_ops,
- sys, &sys->resources);
- } else {
- bus = NULL;
- BUG();
- }
+ pp->root_bus_nr = sys->busnr;
+ bus = pci_create_root_bus(pp->dev, sys->busnr,
+ &dw_pcie_ops, sys, &sys->resources);
+ if (!bus)
+ return NULL;
+
+ pci_scan_child_bus(bus);
+
+ if (bus && pp->ops->scan_bus)
+ pp->ops->scan_bus(pp);
return bus;
}
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index daf81f9..a476e60 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -48,6 +48,7 @@
struct resource cfg;
struct resource io;
struct resource mem;
+ struct resource busn;
struct pcie_port_info config;
int irq;
u32 lanes;
@@ -74,6 +75,8 @@
void (*msi_set_irq)(struct pcie_port *pp, int irq);
void (*msi_clear_irq)(struct pcie_port *pp, int irq);
u32 (*get_msi_data)(struct pcie_port *pp);
+ void (*scan_bus)(struct pcie_port *pp);
+ int (*msi_host_init)(struct pcie_port *pp, struct msi_chip *chip);
};
int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val);