diff options
| -rw-r--r-- | drivers/phy/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/phy/Makefile | 2 | ||||
| -rw-r--r-- | drivers/phy/phy-bcm-ns2-pcie.c | 115 |
3 files changed, 124 insertions, 1 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index b869b98835f4..01fb93b4b1e4 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 9c3e73ccabc4..7aea094da3e2 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 000000000000..9513f7ab1eaa --- /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"); |