diff options
Diffstat (limited to 'target')
2 files changed, 302 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.4/089-0001-phy-bcm-ns-usb2-new-driver-for-USB-2.0-PHY-on-Norths.patch b/target/linux/bcm53xx/patches-4.4/089-0001-phy-bcm-ns-usb2-new-driver-for-USB-2.0-PHY-on-Norths.patch new file mode 100644 index 0000000000..870bcb8d7a --- /dev/null +++ b/target/linux/bcm53xx/patches-4.4/089-0001-phy-bcm-ns-usb2-new-driver-for-USB-2.0-PHY-on-Norths.patch @@ -0,0 +1,270 @@ +From d3feb406733544dbf0e239ef945a09decdceac88 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> +Date: Thu, 14 Apr 2016 11:37:43 +0200 +Subject: [PATCH] phy: bcm-ns-usb2: new driver for USB 2.0 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 an EHCI controller driver. +There are (just a few) registers being defined in bcma header. It's +because DMU/CRU registers will be also needed in other drivers. We will +need them e.g. in PCIe controller/PHY driver and at some point probably +in clock driver for BCM53573 chipset. By using include/linux/bcma/ we +avoid code duplication. + +Signed-off-by: Rafał Miłecki <zajec5@gmail.com> +Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> +--- + .../devicetree/bindings/phy/bcm-ns-usb2-phy.txt | 21 ++++ + drivers/phy/Kconfig | 9 ++ + drivers/phy/Makefile | 1 + + drivers/phy/phy-bcm-ns-usb2.c | 137 +++++++++++++++++++++ + include/linux/bcma/bcma.h | 1 + + include/linux/bcma/bcma_driver_arm_c9.h | 15 +++ + 6 files changed, 184 insertions(+) + create mode 100644 Documentation/devicetree/bindings/phy/bcm-ns-usb2-phy.txt + create mode 100644 drivers/phy/phy-bcm-ns-usb2.c + create mode 100644 include/linux/bcma/bcma_driver_arm_c9.h + +diff --git a/Documentation/devicetree/bindings/phy/bcm-ns-usb2-phy.txt b/Documentation/devicetree/bindings/phy/bcm-ns-usb2-phy.txt +new file mode 100644 +index 0000000..a7aee9e +--- /dev/null ++++ b/Documentation/devicetree/bindings/phy/bcm-ns-usb2-phy.txt +@@ -0,0 +1,21 @@ ++Driver for Broadcom Northstar USB 2.0 PHY ++ ++Required properties: ++- compatible: brcm,ns-usb2-phy ++- reg: iomem address range of DMU (Device Management Unit) ++- reg-names: "dmu", the only needed & supported reg right now ++- clocks: USB PHY reference clock ++- clock-names: "phy-ref-clk", the only needed & supported clock right now ++ ++To initialize USB 2.0 PHY driver needs to setup PLL correctly. To do this it ++requires passing phandle to the USB PHY reference clock. ++ ++Example: ++ usb2-phy { ++ compatible = "brcm,ns-usb2-phy"; ++ reg = <0x1800c000 0x1000>; ++ reg-names = "dmu"; ++ #phy-cells = <0>; ++ clocks = <&genpll BCM_NSP_GENPLL_USB_PHY_REF_CLK>; ++ clock-names = "phy-ref-clk"; ++ }; +diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig +index f6ff76e..f2b458f 100644 +--- a/drivers/phy/Kconfig ++++ b/drivers/phy/Kconfig +@@ -15,6 +15,15 @@ config GENERIC_PHY + phy users can obtain reference to the PHY. All the users of this + framework should select this config. + ++config PHY_BCM_NS_USB2 ++ tristate "Broadcom Northstar USB 2.0 PHY Driver" ++ depends on ARCH_BCM_IPROC || COMPILE_TEST ++ depends on HAS_IOMEM && OF ++ select GENERIC_PHY ++ help ++ Enable this to support Broadcom USB 2.0 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 +diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile +index f03fa1f..0de09e1 100644 +--- a/drivers/phy/Makefile ++++ b/drivers/phy/Makefile +@@ -3,6 +3,7 @@ + # + + obj-$(CONFIG_GENERIC_PHY) += phy-core.o ++obj-$(CONFIG_PHY_BCM_NS_USB2) += phy-bcm-ns-usb2.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 +diff --git a/drivers/phy/phy-bcm-ns-usb2.c b/drivers/phy/phy-bcm-ns-usb2.c +new file mode 100644 +index 0000000..95ab6b2 +--- /dev/null ++++ b/drivers/phy/phy-bcm-ns-usb2.c +@@ -0,0 +1,137 @@ ++/* ++ * Broadcom Northstar USB 2.0 PHY Driver ++ * ++ * Copyright (C) 2016 Rafał Miłecki <zajec5@gmail.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 ++ * published by the Free Software Foundation. ++ * ++ */ ++ ++#include <linux/bcma/bcma.h> ++#include <linux/clk.h> ++#include <linux/delay.h> ++#include <linux/err.h> ++#include <linux/module.h> ++#include <linux/of_address.h> ++#include <linux/of_platform.h> ++#include <linux/phy/phy.h> ++#include <linux/platform_device.h> ++#include <linux/slab.h> ++ ++struct bcm_ns_usb2 { ++ struct device *dev; ++ struct clk *ref_clk; ++ struct phy *phy; ++ void __iomem *dmu; ++}; ++ ++static int bcm_ns_usb2_phy_init(struct phy *phy) ++{ ++ struct bcm_ns_usb2 *usb2 = phy_get_drvdata(phy); ++ struct device *dev = usb2->dev; ++ void __iomem *dmu = usb2->dmu; ++ u32 ref_clk_rate, usb2ctl, usb_pll_ndiv, usb_pll_pdiv; ++ int err = 0; ++ ++ err = clk_prepare_enable(usb2->ref_clk); ++ if (err < 0) { ++ dev_err(dev, "Failed to prepare ref clock: %d\n", err); ++ goto err_out; ++ } ++ ++ ref_clk_rate = clk_get_rate(usb2->ref_clk); ++ if (!ref_clk_rate) { ++ dev_err(dev, "Failed to get ref clock rate\n"); ++ err = -EINVAL; ++ goto err_clk_off; ++ } ++ ++ usb2ctl = readl(dmu + BCMA_DMU_CRU_USB2_CONTROL); ++ ++ if (usb2ctl & BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_MASK) { ++ usb_pll_pdiv = usb2ctl; ++ usb_pll_pdiv &= BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_MASK; ++ usb_pll_pdiv >>= BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_SHIFT; ++ } else { ++ usb_pll_pdiv = 1 << 3; ++ } ++ ++ /* Calculate ndiv based on a solid 1920 MHz that is for USB2 PHY */ ++ usb_pll_ndiv = (1920000000 * usb_pll_pdiv) / ref_clk_rate; ++ ++ /* Unlock DMU PLL settings with some magic value */ ++ writel(0x0000ea68, dmu + BCMA_DMU_CRU_CLKSET_KEY); ++ ++ /* Write USB 2.0 PLL control setting */ ++ usb2ctl &= ~BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_MASK; ++ usb2ctl |= usb_pll_ndiv << BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_SHIFT; ++ writel(usb2ctl, dmu + BCMA_DMU_CRU_USB2_CONTROL); ++ ++ /* Lock DMU PLL settings */ ++ writel(0x00000000, dmu + BCMA_DMU_CRU_CLKSET_KEY); ++ ++err_clk_off: ++ clk_disable_unprepare(usb2->ref_clk); ++err_out: ++ return err; ++} ++ ++static const struct phy_ops ops = { ++ .init = bcm_ns_usb2_phy_init, ++ .owner = THIS_MODULE, ++}; ++ ++static int bcm_ns_usb2_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct bcm_ns_usb2 *usb2; ++ struct resource *res; ++ struct phy_provider *phy_provider; ++ ++ usb2 = devm_kzalloc(&pdev->dev, sizeof(*usb2), GFP_KERNEL); ++ if (!usb2) ++ return -ENOMEM; ++ usb2->dev = dev; ++ ++ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmu"); ++ usb2->dmu = devm_ioremap_resource(dev, res); ++ if (IS_ERR(usb2->dmu)) { ++ dev_err(dev, "Failed to map DMU regs\n"); ++ return PTR_ERR(usb2->dmu); ++ } ++ ++ usb2->ref_clk = devm_clk_get(dev, "phy-ref-clk"); ++ if (IS_ERR(usb2->ref_clk)) { ++ dev_err(dev, "Clock not defined\n"); ++ return PTR_ERR(usb2->ref_clk); ++ } ++ ++ usb2->phy = devm_phy_create(dev, NULL, &ops); ++ if (IS_ERR(dev)) ++ return PTR_ERR(dev); ++ ++ phy_set_drvdata(usb2->phy, usb2); ++ platform_set_drvdata(pdev, usb2); ++ ++ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); ++ return PTR_ERR_OR_ZERO(phy_provider); ++} ++ ++static const struct of_device_id bcm_ns_usb2_id_table[] = { ++ { .compatible = "brcm,ns-usb2-phy", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, bcm_ns_usb2_id_table); ++ ++static struct platform_driver bcm_ns_usb2_driver = { ++ .probe = bcm_ns_usb2_probe, ++ .driver = { ++ .name = "bcm_ns_usb2", ++ .of_match_table = bcm_ns_usb2_id_table, ++ }, ++}; ++module_platform_driver(bcm_ns_usb2_driver); ++ ++MODULE_LICENSE("GPL v2"); +diff --git a/include/linux/bcma/bcma.h b/include/linux/bcma/bcma.h +index 0367c63..e6b41f4 100644 +--- a/include/linux/bcma/bcma.h ++++ b/include/linux/bcma/bcma.h +@@ -4,6 +4,7 @@ + #include <linux/pci.h> + #include <linux/mod_devicetable.h> + ++#include <linux/bcma/bcma_driver_arm_c9.h> + #include <linux/bcma/bcma_driver_chipcommon.h> + #include <linux/bcma/bcma_driver_pci.h> + #include <linux/bcma/bcma_driver_pcie2.h> +diff --git a/include/linux/bcma/bcma_driver_arm_c9.h b/include/linux/bcma/bcma_driver_arm_c9.h +new file mode 100644 +index 0000000..93bd73d +--- /dev/null ++++ b/include/linux/bcma/bcma_driver_arm_c9.h +@@ -0,0 +1,15 @@ ++#ifndef LINUX_BCMA_DRIVER_ARM_C9_H_ ++#define LINUX_BCMA_DRIVER_ARM_C9_H_ ++ ++/* DMU (Device Management Unit) */ ++#define BCMA_DMU_CRU_USB2_CONTROL 0x0164 ++#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_MASK 0x00000FFC ++#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_SHIFT 2 ++#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_MASK 0x00007000 ++#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_SHIFT 12 ++#define BCMA_DMU_CRU_CLKSET_KEY 0x0180 ++#define BCMA_DMU_CRU_STRAPS_CTRL 0x02A0 ++#define BCMA_DMU_CRU_STRAPS_CTRL_USB3 0x00000010 ++#define BCMA_DMU_CRU_STRAPS_CTRL_4BYTE 0x00008000 ++ ++#endif /* LINUX_BCMA_DRIVER_ARM_C9_H_ */ +-- +1.8.4.5 + diff --git a/target/linux/bcm53xx/patches-4.4/089-0002-phy-bcm-ns-usb2-checking-the-wrong-variable.patch b/target/linux/bcm53xx/patches-4.4/089-0002-phy-bcm-ns-usb2-checking-the-wrong-variable.patch new file mode 100644 index 0000000000..81144dc2b3 --- /dev/null +++ b/target/linux/bcm53xx/patches-4.4/089-0002-phy-bcm-ns-usb2-checking-the-wrong-variable.patch @@ -0,0 +1,32 @@ +From 6c081ff6fd5abd621797570be43d5e3c6acfcd58 Mon Sep 17 00:00:00 2001 +From: Dan Carpenter <dan.carpenter@oracle.com> +Date: Tue, 10 May 2016 11:01:33 +0300 +Subject: [PATCH] phy: bcm-ns-usb2: checking the wrong variable + +We intended to test "usb2->phy" here instead of "dev". + +Fixes: d3feb4067335 ('phy: bcm-ns-usb2: new driver for USB 2.0 PHY on Northstar') +Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> +Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> +--- + drivers/phy/phy-bcm-ns-usb2.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/drivers/phy/phy-bcm-ns-usb2.c b/drivers/phy/phy-bcm-ns-usb2.c +index 95ab6b2..58dff80 100644 +--- a/drivers/phy/phy-bcm-ns-usb2.c ++++ b/drivers/phy/phy-bcm-ns-usb2.c +@@ -109,8 +109,8 @@ static int bcm_ns_usb2_probe(struct platform_device *pdev) + } + + usb2->phy = devm_phy_create(dev, NULL, &ops); +- if (IS_ERR(dev)) +- return PTR_ERR(dev); ++ if (IS_ERR(usb2->phy)) ++ return PTR_ERR(usb2->phy); + + phy_set_drvdata(usb2->phy, usb2); + platform_set_drvdata(pdev, usb2); +-- +1.8.4.5 + |