diff options
| -rw-r--r-- | target/linux/bcm53xx/config-4.4 | 1 | ||||
| -rw-r--r-- | target/linux/bcm53xx/patches-4.4/071-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch | 361 |
2 files changed, 362 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/config-4.4 b/target/linux/bcm53xx/config-4.4 index a1f8e2e64a..625b7e7e87 100644 --- a/target/linux/bcm53xx/config-4.4 +++ b/target/linux/bcm53xx/config-4.4 @@ -259,6 +259,7 @@ CONFIG_PERF_USE_VMALLOC=y CONFIG_PGTABLE_LEVELS=2 CONFIG_PHYLIB=y # CONFIG_PHY_BCM_NS_USB2 is not set +# CONFIG_PHY_BCM_NS_USB3 is not set CONFIG_PINCTRL=y # CONFIG_PL310_ERRATA_588369 is not set # CONFIG_PL310_ERRATA_727915 is not set diff --git a/target/linux/bcm53xx/patches-4.4/071-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch b/target/linux/bcm53xx/patches-4.4/071-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch new file mode 100644 index 0000000000..ad34fc8484 --- /dev/null +++ b/target/linux/bcm53xx/patches-4.4/071-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch @@ -0,0 +1,361 @@ +From b8d7478ecfec51b3430f677da44e662d5ff12444 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Fri, 12 Aug 2016 00:28:03 +0200 +Subject: [PATCH] phy: bcm-ns-usb3: new driver for USB 3.0 PHY on Northstar +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Northstar is a family of SoCs used in home routers. They have USB 2.0 +and 3.0 controllers with PHYs that need to be properly initialized. +This driver provides PHY init support in a generic way and can be bound +with XHCI controller driver. + +There aren't any public datasheets from Broadcom so we can't have nice +defines for all used bits. It means we just follow Broadcom's +initialization procedure using their magic values. We were quite lucky +actually that Broadcom put some comments in their SDK reference code +explaining what given writes are responsible for. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> +--- + .../devicetree/bindings/phy/bcm-ns-usb3-phy.txt | 23 ++ + drivers/phy/Kconfig | 9 + + drivers/phy/Makefile | 1 + + drivers/phy/phy-bcm-ns-usb3.c | 274 +++++++++++++++++++++ + 4 files changed, 307 insertions(+) + create mode 100644 Documentation/devicetree/bindings/phy/bcm-ns-usb3-phy.txt + create mode 100644 drivers/phy/phy-bcm-ns-usb3.c + +--- /dev/null ++++ b/Documentation/devicetree/bindings/phy/bcm-ns-usb3-phy.txt +@@ -0,0 +1,23 @@ ++Driver for Broadcom Northstar USB 3.0 PHY ++ ++Required properties: ++ ++- compatible: one of: "brcm,ns-ax-usb3-phy", "brcm,ns-bx-usb3-phy". ++- reg: register mappings for DMP (Device Management Plugin) and ChipCommon B ++ MMI. ++- reg-names: "dmp" and "ccb-mii" ++ ++Initialization of USB 3.0 PHY depends on Northstar version. There are currently ++three known series: Ax, Bx and Cx. ++Known A0: BCM4707 rev 0 ++Known B0: BCM4707 rev 4, BCM53573 rev 2 ++Known B1: BCM4707 rev 6 ++Known C0: BCM47094 rev 0 ++ ++Example: ++ usb3-phy { ++ compatible = "brcm,ns-ax-usb3-phy"; ++ reg = <0x18105000 0x1000>, <0x18003000 0x1000>; ++ reg-names = "dmp", "ccb-mii"; ++ #phy-cells = <0>; ++ }; +--- a/drivers/phy/Kconfig ++++ b/drivers/phy/Kconfig +@@ -24,6 +24,15 @@ config PHY_BCM_NS_USB2 + Enable this to support Broadcom USB 2.0 PHY connected to the USB + controller on Northstar family. + ++config PHY_BCM_NS_USB3 ++ tristate "Broadcom Northstar USB 3.0 PHY Driver" ++ depends on ARCH_BCM_IPROC || COMPILE_TEST ++ depends on HAS_IOMEM && OF ++ select GENERIC_PHY ++ help ++ Enable this to support Broadcom USB 3.0 PHY connected to the USB ++ controller on Northstar family. ++ + config PHY_BERLIN_USB + tristate "Marvell Berlin USB PHY Driver" + depends on ARCH_BERLIN && RESET_CONTROLLER && HAS_IOMEM && OF +--- a/drivers/phy/Makefile ++++ b/drivers/phy/Makefile +@@ -4,6 +4,7 @@ + + obj-$(CONFIG_GENERIC_PHY) += phy-core.o + obj-$(CONFIG_PHY_BCM_NS_USB2) += phy-bcm-ns-usb2.o ++obj-$(CONFIG_PHY_BCM_NS_USB3) += phy-bcm-ns-usb3.o + obj-$(CONFIG_PHY_BERLIN_USB) += phy-berlin-usb.o + obj-$(CONFIG_PHY_BERLIN_SATA) += phy-berlin-sata.o + obj-$(CONFIG_PHY_DM816X_USB) += phy-dm816x-usb.o +--- /dev/null ++++ b/drivers/phy/phy-bcm-ns-usb3.c +@@ -0,0 +1,274 @@ ++/* ++ * Broadcom Northstar USB 3.0 PHY Driver ++ * ++ * Copyright (C) 2016 Rafał Miłecki <rafal@milecki.pl> ++ * ++ * All magic values used for initialization (and related comments) were obtained ++ * from Broadcom's SDK: ++ * Copyright (c) Broadcom Corp, 2012 ++ * ++ * 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 ++ * published by the Free Software Foundation. ++ */ ++ ++#include <linux/bcma/bcma.h> ++#include <linux/delay.h> ++#include <linux/err.h> ++#include <linux/module.h> ++#include <linux/of_platform.h> ++#include <linux/platform_device.h> ++#include <linux/phy/phy.h> ++#include <linux/slab.h> ++ ++#define BCM_NS_USB3_MII_MNG_TIMEOUT_US 1000 /* usecs */ ++ ++enum bcm_ns_family { ++ BCM_NS_UNKNOWN, ++ BCM_NS_AX, ++ BCM_NS_BX, ++}; ++ ++struct bcm_ns_usb3 { ++ struct device *dev; ++ enum bcm_ns_family family; ++ void __iomem *dmp; ++ void __iomem *ccb_mii; ++ struct phy *phy; ++}; ++ ++static const struct of_device_id bcm_ns_usb3_id_table[] = { ++ { ++ .compatible = "brcm,ns-ax-usb3-phy", ++ .data = (int *)BCM_NS_AX, ++ }, ++ { ++ .compatible = "brcm,ns-bx-usb3-phy", ++ .data = (int *)BCM_NS_BX, ++ }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, bcm_ns_usb3_id_table); ++ ++static int bcm_ns_usb3_wait_reg(struct bcm_ns_usb3 *usb3, void __iomem *addr, ++ u32 mask, u32 value, unsigned long timeout) ++{ ++ unsigned long deadline = jiffies + timeout; ++ u32 val; ++ ++ do { ++ val = readl(addr); ++ if ((val & mask) == value) ++ return 0; ++ cpu_relax(); ++ udelay(10); ++ } while (!time_after_eq(jiffies, deadline)); ++ ++ dev_err(usb3->dev, "Timeout waiting for register %p\n", addr); ++ ++ return -EBUSY; ++} ++ ++static inline int bcm_ns_usb3_mii_mng_wait_idle(struct bcm_ns_usb3 *usb3) ++{ ++ return bcm_ns_usb3_wait_reg(usb3, usb3->ccb_mii + BCMA_CCB_MII_MNG_CTL, ++ 0x0100, 0x0000, ++ usecs_to_jiffies(BCM_NS_USB3_MII_MNG_TIMEOUT_US)); ++} ++ ++static int bcm_ns_usb3_mii_mng_write32(struct bcm_ns_usb3 *usb3, u32 value) ++{ ++ int err; ++ ++ err = bcm_ns_usb3_mii_mng_wait_idle(usb3); ++ if (err < 0) { ++ dev_err(usb3->dev, "Couldn't write 0x%08x value\n", value); ++ return err; ++ } ++ ++ writel(value, usb3->ccb_mii + BCMA_CCB_MII_MNG_CMD_DATA); ++ ++ return 0; ++} ++ ++static int bcm_ns_usb3_phy_init_ns_bx(struct bcm_ns_usb3 *usb3) ++{ ++ int err; ++ ++ /* Enable MDIO. Setting MDCDIV as 26 */ ++ writel(0x0000009a, usb3->ccb_mii + BCMA_CCB_MII_MNG_CTL); ++ ++ /* Wait for MDIO? */ ++ udelay(2); ++ ++ /* USB3 PLL Block */ ++ err = bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8000); ++ if (err < 0) ++ return err; ++ ++ /* Assert Ana_Pllseq start */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x58061000); ++ ++ /* Assert CML Divider ratio to 26 */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x582a6400); ++ ++ /* Asserting PLL Reset */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x582ec000); ++ ++ /* Deaaserting PLL Reset */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x582e8000); ++ ++ /* Waiting MII Mgt interface idle */ ++ bcm_ns_usb3_mii_mng_wait_idle(usb3); ++ ++ /* Deasserting USB3 system reset */ ++ writel(0, usb3->dmp + BCMA_RESET_CTL); ++ ++ /* PLL frequency monitor enable */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x58069000); ++ ++ /* PIPE Block */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8060); ++ ++ /* CMPMAX & CMPMINTH setting */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x580af30d); ++ ++ /* DEGLITCH MIN & MAX setting */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x580e6302); ++ ++ /* TXPMD block */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8040); ++ ++ /* Enabling SSC */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x58061003); ++ ++ /* Waiting MII Mgt interface idle */ ++ bcm_ns_usb3_mii_mng_wait_idle(usb3); ++ ++ return 0; ++} ++ ++static int bcm_ns_usb3_phy_init_ns_ax(struct bcm_ns_usb3 *usb3) ++{ ++ int err; ++ ++ /* Enable MDIO. Setting MDCDIV as 26 */ ++ writel(0x0000009a, usb3->ccb_mii + BCMA_CCB_MII_MNG_CTL); ++ ++ /* Wait for MDIO? */ ++ udelay(2); ++ ++ /* PLL30 block */ ++ err = bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8000); ++ if (err < 0) ++ return err; ++ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x582a6400); ++ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x587e80e0); ++ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x580a009c); ++ ++ /* Enable SSC */ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8040); ++ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x580a21d3); ++ ++ bcm_ns_usb3_mii_mng_write32(usb3, 0x58061003); ++ ++ /* Waiting MII Mgt interface idle */ ++ bcm_ns_usb3_mii_mng_wait_idle(usb3); ++ ++ /* Deasserting USB3 system reset */ ++ writel(0, usb3->dmp + BCMA_RESET_CTL); ++ ++ return 0; ++} ++ ++static int bcm_ns_usb3_phy_init(struct phy *phy) ++{ ++ struct bcm_ns_usb3 *usb3 = phy_get_drvdata(phy); ++ int err; ++ ++ /* Perform USB3 system soft reset */ ++ writel(BCMA_RESET_CTL_RESET, usb3->dmp + BCMA_RESET_CTL); ++ ++ switch (usb3->family) { ++ case BCM_NS_AX: ++ err = bcm_ns_usb3_phy_init_ns_ax(usb3); ++ break; ++ case BCM_NS_BX: ++ err = bcm_ns_usb3_phy_init_ns_bx(usb3); ++ break; ++ default: ++ WARN_ON(1); ++ err = -ENOTSUPP; ++ } ++ ++ return err; ++} ++ ++static const struct phy_ops ops = { ++ .init = bcm_ns_usb3_phy_init, ++ .owner = THIS_MODULE, ++}; ++ ++static int bcm_ns_usb3_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ const struct of_device_id *of_id; ++ struct bcm_ns_usb3 *usb3; ++ struct resource *res; ++ struct phy_provider *phy_provider; ++ ++ usb3 = devm_kzalloc(dev, sizeof(*usb3), GFP_KERNEL); ++ if (!usb3) ++ return -ENOMEM; ++ ++ usb3->dev = dev; ++ ++ of_id = of_match_device(bcm_ns_usb3_id_table, dev); ++ if (!of_id) ++ return -EINVAL; ++ usb3->family = (enum bcm_ns_family)of_id->data; ++ ++ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmp"); ++ usb3->dmp = devm_ioremap_resource(dev, res); ++ if (IS_ERR(usb3->dmp)) { ++ dev_err(dev, "Failed to map DMP regs\n"); ++ return PTR_ERR(usb3->dmp); ++ } ++ ++ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ccb-mii"); ++ usb3->ccb_mii = devm_ioremap_resource(dev, res); ++ if (IS_ERR(usb3->ccb_mii)) { ++ dev_err(dev, "Failed to map ChipCommon B MII regs\n"); ++ return PTR_ERR(usb3->ccb_mii); ++ } ++ ++ usb3->phy = devm_phy_create(dev, NULL, &ops); ++ if (IS_ERR(usb3->phy)) { ++ dev_err(dev, "Failed to create PHY\n"); ++ return PTR_ERR(usb3->phy); ++ } ++ ++ phy_set_drvdata(usb3->phy, usb3); ++ platform_set_drvdata(pdev, usb3); ++ ++ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); ++ if (!IS_ERR(phy_provider)) ++ dev_info(dev, "Registered Broadcom Northstar USB 3.0 PHY driver\n"); ++ ++ return PTR_ERR_OR_ZERO(phy_provider); ++} ++ ++static struct platform_driver bcm_ns_usb3_driver = { ++ .probe = bcm_ns_usb3_probe, ++ .driver = { ++ .name = "bcm_ns_usb3", ++ .of_match_table = bcm_ns_usb3_id_table, ++ }, ++}; ++module_platform_driver(bcm_ns_usb3_driver); ++ ++MODULE_LICENSE("GPL v2"); |