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authorBjorn Helgaas <bhelgaas@google.com>2022-08-04 11:46:52 -0500
committerBjorn Helgaas <bhelgaas@google.com>2022-08-04 11:46:52 -0500
commit56ebef0a82264835fd032f1716d72beabc424189 (patch)
tree2a4f92483b69f6615df2622271c82c6a7a36f4af
parenta91c6db7f3da76ffcd4e809ecb28f118e7effb91 (diff)
parent4e6217e3af8adee269403effe210c1df51ac69dd (diff)
Merge branch 'pci/ctrl/xilinx-cpm'
- Add DT binding and driver support for Versal CPM5 Gen5 Root Port (Bharat Kumar Gogada) * pci/ctrl/xilinx-cpm: MAINTAINERS: Add Xilinx Versal CPM Root Port maintainers PCI: xilinx-cpm: Add support for Versal CPM5 Root Port dt-bindings: PCI: xilinx-cpm: Add Versal CPM5 Root Port
-rw-r--r--Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml38
-rw-r--r--MAINTAINERS8
-rw-r--r--drivers/pci/controller/pcie-xilinx-cpm.c60
3 files changed, 103 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
index cca395317a4c..24ddc2855b94 100644
--- a/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
+++ b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
@@ -14,17 +14,23 @@ allOf:
properties:
compatible:
- const: xlnx,versal-cpm-host-1.00
+ enum:
+ - xlnx,versal-cpm-host-1.00
+ - xlnx,versal-cpm5-host
reg:
items:
- description: CPM system level control and status registers.
- description: Configuration space region and bridge registers.
+ - description: CPM5 control and status registers.
+ minItems: 2
reg-names:
items:
- const: cpm_slcr
- const: cfg
+ - const: cpm_csr
+ minItems: 2
interrupts:
maxItems: 1
@@ -95,4 +101,34 @@ examples:
interrupt-controller;
};
};
+
+ cpm5_pcie: pcie@fcdd0000 {
+ compatible = "xlnx,versal-cpm5-host";
+ device_type = "pci";
+ #address-cells = <3>;
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ interrupts = <0 72 4>;
+ interrupt-parent = <&gic>;
+ interrupt-map-mask = <0 0 0 7>;
+ interrupt-map = <0 0 0 1 &pcie_intc_1 0>,
+ <0 0 0 2 &pcie_intc_1 1>,
+ <0 0 0 3 &pcie_intc_1 2>,
+ <0 0 0 4 &pcie_intc_1 3>;
+ bus-range = <0x00 0xff>;
+ ranges = <0x02000000 0x0 0xe0000000 0x0 0xe0000000 0x0 0x10000000>,
+ <0x43000000 0x80 0x00000000 0x80 0x00000000 0x0 0x80000000>;
+ msi-map = <0x0 &its_gic 0x0 0x10000>;
+ reg = <0x00 0xfcdd0000 0x00 0x1000>,
+ <0x06 0x00000000 0x00 0x1000000>,
+ <0x00 0xfce20000 0x00 0x1000000>;
+ reg-names = "cpm_slcr", "cfg", "cpm_csr";
+
+ pcie_intc_1: interrupt-controller {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ };
+ };
+
};
diff --git a/MAINTAINERS b/MAINTAINERS
index a6d3bd9d2a8d..7c655d057fcb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15540,6 +15540,14 @@ L: linux-pci@vger.kernel.org
S: Maintained
F: drivers/pci/controller/dwc/*spear*
+PCI DRIVER FOR XILINX VERSAL CPM
+M: Bharat Kumar Gogada <bharat.kumar.gogada@amd.com>
+M: Michal Simek <michal.simek@amd.com>
+L: linux-pci@vger.kernel.org
+S: Maintained
+F: Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
+F: drivers/pci/controller/pcie-xilinx-cpm.c
+
PCMCIA SUBSYSTEM
M: Dominik Brodowski <linux@dominikbrodowski.net>
S: Odd Fixes
diff --git a/drivers/pci/controller/pcie-xilinx-cpm.c b/drivers/pci/controller/pcie-xilinx-cpm.c
index c7cd44ed4dfc..e4ab48041eb6 100644
--- a/drivers/pci/controller/pcie-xilinx-cpm.c
+++ b/drivers/pci/controller/pcie-xilinx-cpm.c
@@ -35,6 +35,10 @@
#define XILINX_CPM_PCIE_MISC_IR_ENABLE 0x00000348
#define XILINX_CPM_PCIE_MISC_IR_LOCAL BIT(1)
+#define XILINX_CPM_PCIE_IR_STATUS 0x000002A0
+#define XILINX_CPM_PCIE_IR_ENABLE 0x000002A8
+#define XILINX_CPM_PCIE_IR_LOCAL BIT(0)
+
/* Interrupt registers definitions */
#define XILINX_CPM_PCIE_INTR_LINK_DOWN 0
#define XILINX_CPM_PCIE_INTR_HOT_RESET 3
@@ -98,6 +102,19 @@
/* Phy Status/Control Register definitions */
#define XILINX_CPM_PCIE_REG_PSCR_LNKUP BIT(11)
+enum xilinx_cpm_version {
+ CPM,
+ CPM5,
+};
+
+/**
+ * struct xilinx_cpm_variant - CPM variant information
+ * @version: CPM version
+ */
+struct xilinx_cpm_variant {
+ enum xilinx_cpm_version version;
+};
+
/**
* struct xilinx_cpm_pcie - PCIe port information
* @dev: Device pointer
@@ -109,6 +126,7 @@
* @intx_irq: legacy interrupt number
* @irq: Error interrupt number
* @lock: lock protecting shared register access
+ * @variant: CPM version check pointer
*/
struct xilinx_cpm_pcie {
struct device *dev;
@@ -120,6 +138,7 @@ struct xilinx_cpm_pcie {
int intx_irq;
int irq;
raw_spinlock_t lock;
+ const struct xilinx_cpm_variant *variant;
};
static u32 pcie_read(struct xilinx_cpm_pcie *port, u32 reg)
@@ -285,6 +304,13 @@ static void xilinx_cpm_pcie_event_flow(struct irq_desc *desc)
generic_handle_domain_irq(port->cpm_domain, i);
pcie_write(port, val, XILINX_CPM_PCIE_REG_IDR);
+ if (port->variant->version == CPM5) {
+ val = readl_relaxed(port->cpm_base + XILINX_CPM_PCIE_IR_STATUS);
+ if (val)
+ writel_relaxed(val, port->cpm_base +
+ XILINX_CPM_PCIE_IR_STATUS);
+ }
+
/*
* XILINX_CPM_PCIE_MISC_IR_STATUS register is mapped to
* CPM SLCR block.
@@ -484,6 +510,12 @@ static void xilinx_cpm_pcie_init_port(struct xilinx_cpm_pcie *port)
*/
writel(XILINX_CPM_PCIE_MISC_IR_LOCAL,
port->cpm_base + XILINX_CPM_PCIE_MISC_IR_ENABLE);
+
+ if (port->variant->version == CPM5) {
+ writel(XILINX_CPM_PCIE_IR_LOCAL,
+ port->cpm_base + XILINX_CPM_PCIE_IR_ENABLE);
+ }
+
/* Enable the Bridge enable bit */
pcie_write(port, pcie_read(port, XILINX_CPM_PCIE_REG_RPSC) |
XILINX_CPM_PCIE_REG_RPSC_BEN,
@@ -518,7 +550,14 @@ static int xilinx_cpm_pcie_parse_dt(struct xilinx_cpm_pcie *port,
if (IS_ERR(port->cfg))
return PTR_ERR(port->cfg);
- port->reg_base = port->cfg->win;
+ if (port->variant->version == CPM5) {
+ port->reg_base = devm_platform_ioremap_resource_byname(pdev,
+ "cpm_csr");
+ if (IS_ERR(port->reg_base))
+ return PTR_ERR(port->reg_base);
+ } else {
+ port->reg_base = port->cfg->win;
+ }
return 0;
}
@@ -559,6 +598,8 @@ static int xilinx_cpm_pcie_probe(struct platform_device *pdev)
if (!bus)
return -ENODEV;
+ port->variant = of_device_get_match_data(dev);
+
err = xilinx_cpm_pcie_parse_dt(port, bus->res);
if (err) {
dev_err(dev, "Parsing DT failed\n");
@@ -591,8 +632,23 @@ err_parse_dt:
return err;
}
+static const struct xilinx_cpm_variant cpm_host = {
+ .version = CPM,
+};
+
+static const struct xilinx_cpm_variant cpm5_host = {
+ .version = CPM5,
+};
+
static const struct of_device_id xilinx_cpm_pcie_of_match[] = {
- { .compatible = "xlnx,versal-cpm-host-1.00", },
+ {
+ .compatible = "xlnx,versal-cpm-host-1.00",
+ .data = &cpm_host,
+ },
+ {
+ .compatible = "xlnx,versal-cpm5-host",
+ .data = &cpm5_host,
+ },
{}
};