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-rw-r--r--Documentation/devicetree/bindings/pci/layerscape-pci.txt14
-rw-r--r--drivers/pci/host/Kconfig2
-rw-r--r--drivers/pci/host/pci-layerscape.c71
3 files changed, 80 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
index 6286f049bf18..e3767857d30d 100644
--- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
+++ b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
@@ -1,10 +1,20 @@
Freescale Layerscape PCIe controller
-This PCIe host controller is based on the Synopsis Designware PCIe IP
+This PCIe host controller is based on the Synopsys DesignWare PCIe IP
and thus inherits all the common properties defined in designware-pcie.txt.
+This controller derives its clocks from the Reset Configuration Word (RCW)
+which is used to describe the PLL settings at the time of chip-reset.
+
+Also as per the available Reference Manuals, there is no specific 'version'
+register available in the Freescale PCIe controller register set,
+which can allow determining the underlying DesignWare PCIe controller version
+information.
+
Required properties:
-- compatible: should contain the platform identifier such as "fsl,ls1021a-pcie"
+- compatible: should contain the platform identifier such as:
+ "fsl,ls1021a-pcie", "snps,dw-pcie"
+ "fsl,ls2080a-pcie", "snps,dw-pcie"
- reg: base addresses and lengths of the PCIe controller
- interrupts: A list of interrupt outputs of the controller. Must contain an
entry for each entry in the interrupt-names property.
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index d5e58bae95cf..fcf08a03535d 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -105,7 +105,7 @@ config PCI_XGENE_MSI
config PCI_LAYERSCAPE
bool "Freescale Layerscape PCIe controller"
- depends on OF && ARM
+ depends on OF && (ARM || ARCH_LAYERSCAPE)
select PCIE_DW
select MFD_SYSCON
help
diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
index 7d61cbb9bab1..0f6dd4456409 100644
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2014 Freescale Semiconductor.
*
- * Author: Minghuan Lian <Minghuan.Lian@freescale.com>
+ * Author: Minghuan Lian <Minghuan.Lian@freescale.com>
*
* 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
@@ -31,20 +31,26 @@
#define LTSSM_STATE_MASK 0x3f
#define LTSSM_PCIE_L0 0x11 /* L0 state */
-/* Symbol Timer Register and Filter Mask Register 1 */
-#define PCIE_STRFMR1 0x71c
+/* PEX Internal Configuration Registers */
+#define PCIE_STRFMR1 0x71c /* Symbol Timer & Filter Mask Register1 */
+#define PCIE_DBI_RO_WR_EN 0x8bc /* DBI Read-Only Write Enable Register */
+
+/* PEX LUT registers */
+#define PCIE_LUT_DBG 0x7FC /* PEX LUT Debug Register */
struct ls_pcie_drvdata {
+ u32 lut_offset;
+ u32 ltssm_shift;
struct pcie_host_ops *ops;
};
struct ls_pcie {
void __iomem *dbi;
+ void __iomem *lut;
struct regmap *scfg;
struct pcie_port pp;
const struct ls_pcie_drvdata *drvdata;
int index;
- int msi_irq;
};
#define to_ls_pcie(x) container_of(x, struct ls_pcie, pp)
@@ -59,6 +65,18 @@ static bool ls_pcie_is_bridge(struct ls_pcie *pcie)
return header_type == PCI_HEADER_TYPE_BRIDGE;
}
+/* Clear multi-function bit */
+static void ls_pcie_clear_multifunction(struct ls_pcie *pcie)
+{
+ iowrite8(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE);
+}
+
+/* Fix class value */
+static void ls_pcie_fix_class(struct ls_pcie *pcie)
+{
+ iowrite16(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE);
+}
+
static int ls1021_pcie_link_up(struct pcie_port *pp)
{
u32 state;
@@ -107,17 +125,61 @@ static void ls1021_pcie_host_init(struct pcie_port *pp)
iowrite32(val, pcie->dbi + PCIE_STRFMR1);
}
+static int ls_pcie_link_up(struct pcie_port *pp)
+{
+ struct ls_pcie *pcie = to_ls_pcie(pp);
+ u32 state;
+
+ state = (ioread32(pcie->lut + PCIE_LUT_DBG) >>
+ pcie->drvdata->ltssm_shift) &
+ LTSSM_STATE_MASK;
+
+ if (state < LTSSM_PCIE_L0)
+ return 0;
+
+ return 1;
+}
+
+static void ls_pcie_host_init(struct pcie_port *pp)
+{
+ struct ls_pcie *pcie = to_ls_pcie(pp);
+
+ iowrite32(1, pcie->dbi + PCIE_DBI_RO_WR_EN);
+ ls_pcie_fix_class(pcie);
+ ls_pcie_clear_multifunction(pcie);
+ iowrite32(0, pcie->dbi + PCIE_DBI_RO_WR_EN);
+}
+
static struct pcie_host_ops ls1021_pcie_host_ops = {
.link_up = ls1021_pcie_link_up,
.host_init = ls1021_pcie_host_init,
};
+static struct pcie_host_ops ls_pcie_host_ops = {
+ .link_up = ls_pcie_link_up,
+ .host_init = ls_pcie_host_init,
+};
+
static struct ls_pcie_drvdata ls1021_drvdata = {
.ops = &ls1021_pcie_host_ops,
};
+static struct ls_pcie_drvdata ls1043_drvdata = {
+ .lut_offset = 0x10000,
+ .ltssm_shift = 24,
+ .ops = &ls_pcie_host_ops,
+};
+
+static struct ls_pcie_drvdata ls2080_drvdata = {
+ .lut_offset = 0x80000,
+ .ltssm_shift = 0,
+ .ops = &ls_pcie_host_ops,
+};
+
static const struct of_device_id ls_pcie_of_match[] = {
{ .compatible = "fsl,ls1021a-pcie", .data = &ls1021_drvdata },
+ { .compatible = "fsl,ls1043a-pcie", .data = &ls1043_drvdata },
+ { .compatible = "fsl,ls2080a-pcie", .data = &ls2080_drvdata },
{ },
};
MODULE_DEVICE_TABLE(of, ls_pcie_of_match);
@@ -164,6 +226,7 @@ static int __init ls_pcie_probe(struct platform_device *pdev)
}
pcie->drvdata = match->data;
+ pcie->lut = pcie->dbi + pcie->drvdata->lut_offset;
if (!ls_pcie_is_bridge(pcie))
return -ENODEV;