Add PCI Phy support for Broadcom Northstar2 SoCs. This driver uses the
interface from the iproc mdio mux driver to enable the devices
respective phys.
Signed-off-by: Jon Mason <jonmason@xxxxxxxxxxxx>
Signed-off-by: Pramod Kumar <pramod.kumar@xxxxxxxxxxxx>
---
drivers/phy/Kconfig | 8 +++
drivers/phy/Makefile | 2 +-
drivers/phy/phy-bcm-ns2-pcie.c | 115 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 124 insertions(+), 1 deletion(-)
create mode 100644 drivers/phy/phy-bcm-ns2-pcie.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index b869b98..01fb93b 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -434,4 +434,12 @@ config PHY_CYGNUS_PCIE
source "drivers/phy/tegra/Kconfig"
+config PHY_NS2_PCIE
+ tristate "Broadcom Northstar2 PCIe PHY driver"
+ depends on OF && MDIO_BUS_MUX_BCM_IPROC
+ select GENERIC_PHY
+ default ARCH_BCM_IPROC
+ help
+ Enable this to support the Broadcom Northstar2 PCIe PHY.
+ If unsure, say N.
endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 9c3e73c..7aea094 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -53,5 +53,5 @@ obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o
obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
obj-$(CONFIG_PHY_CYGNUS_PCIE) += phy-bcm-cygnus-pcie.o
-
obj-$(CONFIG_ARCH_TEGRA) += tegra/
+obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
diff --git a/drivers/phy/phy-bcm-ns2-pcie.c b/drivers/phy/phy-bcm-ns2-pcie.c
new file mode 100644
index 0000000..9513f7a
--- /dev/null
+++ b/drivers/phy/phy-bcm-ns2-pcie.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2016 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of_mdio.h>
+#include <linux/mdio.h>
+#include <linux/phy.h>
+#include <linux/phy/phy.h>
+
+struct ns2_pci_phy {
+ struct mdio_device *mdiodev;
+ struct phy *phy;
+};
+
+#define BLK_ADDR_REG_OFFSET 0x1f
+#define PLL_AFE1_100MHZ_BLK 0x2100
+#define PLL_CLK_AMP_OFFSET 0x03
+#define PLL_CLK_AMP_2P05V 0x2b18
+
+static int ns2_pci_phy_init(struct phy *p)
+{
+ struct ns2_pci_phy *phy = phy_get_drvdata(p);
+ int rc;
+
+ /* select the AFE 100MHz block page */
+ rc = mdiobus_write(phy->mdiodev->bus, phy->mdiodev->addr,
+ BLK_ADDR_REG_OFFSET, PLL_AFE1_100MHZ_BLK);
+ if (rc)
+ goto err;
+
+ /* set the 100 MHz reference clock amplitude to 2.05 v */
+ rc = mdiobus_write(phy->mdiodev->bus, phy->mdiodev->addr,
+ PLL_CLK_AMP_OFFSET, PLL_CLK_AMP_2P05V);
+ if (rc)
+ goto err;
+
+ return 0;
+
+err:
+ dev_err(&phy->mdiodev->dev, "Error %d writing to phy\n", rc);
+ return rc;
+}
+
+static struct phy_ops ns2_pci_phy_ops = {
+ .init = ns2_pci_phy_init,
+};
+
+static int ns2_pci_phy_probe(struct mdio_device *mdiodev)
+{
+ struct device *dev = &mdiodev->dev;
+ struct phy_provider *provider;
+ struct ns2_pci_phy *p;
+ struct phy *phy;
+
+ phy = devm_phy_create(dev, dev->of_node, &ns2_pci_phy_ops);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "failed to create Phy\n");
+ return PTR_ERR(phy);
+ }
+
+ p = devm_kmalloc(dev, sizeof(struct ns2_pci_phy),
+ GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ p->mdiodev = mdiodev;
+ dev_set_drvdata(dev, p);
+
+ p->phy = phy;
+ phy_set_drvdata(phy, p);
+
+ provider = devm_of_phy_provider_register(&phy->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(provider)) {
+ dev_err(dev, "failed to register Phy provider\n");
+ return PTR_ERR(provider);
+ }
+
+ dev_info(dev, "%s PHY registered\n", dev_name(dev));
+
+ return 0;
+}
+
+static const struct of_device_id ns2_pci_phy_of_match[] = {
+ { .compatible = "brcm,ns2-pcie-phy", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ns2_pci_phy_of_match);
+
+static struct mdio_driver ns2_pci_phy_driver = {
+ .mdiodrv = {
+ .driver = {
+ .name = "phy-bcm-ns2-pci",
+ .of_match_table = ns2_pci_phy_of_match,
+ },
+ },
+ .probe = ns2_pci_phy_probe,
+};
+mdio_module_driver(ns2_pci_phy_driver);
+
+MODULE_AUTHOR("Broadcom");
+MODULE_DESCRIPTION("Broadcom Northstar2 PCI Phy driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:phy-bcm-ns2-pci");
--
1.9.1
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