From patchwork Thu Jul 7 22:21:13 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 9219803 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id EBC2360467 for ; Thu, 7 Jul 2016 22:31:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DBE76277D9 for ; Thu, 7 Jul 2016 22:31:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CEF9727E63; Thu, 7 Jul 2016 22:31:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 25E13277D9 for ; Thu, 7 Jul 2016 22:31:04 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bLHoK-0003o8-HB; Thu, 07 Jul 2016 22:30:20 +0000 Received: from mail-pa0-x232.google.com ([2607:f8b0:400e:c03::232]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bLHgS-0007jG-Cl for linux-arm-kernel@lists.infradead.org; Thu, 07 Jul 2016 22:22:17 +0000 Received: by mail-pa0-x232.google.com with SMTP id uj8so9502460pab.3 for ; Thu, 07 Jul 2016 15:21:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=G/6VxM1YEF8QGa3KH7Z7jUnIkgyeCEudaFF7bMaaWL0=; b=ARsvcfaIEAy4KgEx5/OrG5IRYBb3hkhykGa6cMjHS8EXPXpFMjvVs247EsdTKWQYDi xDcGIoyQ8xpFafr6n/MfU0q2ayH3P0vkNfzzmy95QdBU8f1lwfWVwmaVfKPczfilv5PD QJH/s6jHXeoQ1gPJc1v5DVmUdyMumlrZWfrN0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=G/6VxM1YEF8QGa3KH7Z7jUnIkgyeCEudaFF7bMaaWL0=; b=fErbUB11XcwQ/L0X00wjuaFlYYSXIScQIR5Ef1a3VdnT/Ihef7Ob/ya1qS9P3Fc0c+ j1vVr+4NQijMov2vUANjTGJHH+2lrQD3dTr0rrTF+yVobJ+FQqomtl7EwxEP3M6mgm9V J9oTp2doCqBU6eFYlZTLDVTOIiimFyZE2IEZU+yIqg5SX3Me10Sj+ZeJBDuZoLWY8tBE wvFSBVFKSbs74I/2pBasmpQViiMGa2KbXmiGN8AA9Ni0lryBEfjOa5HThj2A+HdZhiL1 5nzXd5KqIKPVFS8JrYYWa/AQeNawNt/Mmvbd7a4Tk1QwiISgYwSIM/FbEvAHuiJ6WWCb WjgQ== X-Gm-Message-State: ALyK8tLl1T2tWilJnrOlcI4ij3gGb2xa18WuiBTiwB28F/5q9LjRwcZzbMtCYkioiarsn3WP X-Received: by 10.66.135.40 with SMTP id pp8mr4221126pab.113.1467930111428; Thu, 07 Jul 2016 15:21:51 -0700 (PDT) Received: from localhost.localdomain (ip68-101-172-78.sd.sd.cox.net. [68.101.172.78]) by smtp.gmail.com with ESMTPSA id j8sm6781807paj.22.2016.07.07.15.21.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 07 Jul 2016 15:21:51 -0700 (PDT) From: Stephen Boyd To: linux-usb@vger.kernel.org Subject: [PATCH v2 22/22] phy: Add support for Qualcomm's USB HS phy Date: Thu, 7 Jul 2016 15:21:13 -0700 Message-Id: <20160707222114.1673-23-stephen.boyd@linaro.org> X-Mailer: git-send-email 2.9.0.rc2.8.ga28705d In-Reply-To: <20160707222114.1673-1-stephen.boyd@linaro.org> References: <20160707222114.1673-1-stephen.boyd@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160707_152212_704734_672B30D2 X-CRM114-Status: GOOD ( 22.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Felipe Balbi , Arnd Bergmann , Neil Armstrong , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Bjorn Andersson , devicetree@vger.kernel.org, Andy Gross , Kishon Vijay Abraham I , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The high-speed phy on qcom SoCs is controlled via the ULPI viewport. Cc: Kishon Vijay Abraham I Cc: Signed-off-by: Stephen Boyd --- .../devicetree/bindings/phy/qcom,usb-hs-phy.txt | 83 ++++++ drivers/phy/Kconfig | 8 + drivers/phy/Makefile | 1 + drivers/phy/phy-qcom-usb-hs.c | 295 +++++++++++++++++++++ 4 files changed, 387 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt create mode 100644 drivers/phy/phy-qcom-usb-hs.c diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt new file mode 100644 index 000000000000..a7bda9186d5b --- /dev/null +++ b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt @@ -0,0 +1,83 @@ +Qualcomm's USB HS PHY + +PROPERTIES + +- compatible: + Usage: required + Value type: + Definition: Should contain "qcom,usb-hs-phy" + +- ulpi-vendor: + Usage: required + Value type: + Definition: Should be 0x05c6 + +- ulpi-product: + Usage: required + Value type: + Definition: Should be 0x0000 + +- #phy-cells: + Usage: required + Value type: + Definition: Should contain 0 + +- clocks: + Usage: required + Value type: + Definition: Should contain clock specifier for the reference and sleep + clocks + +- clock-names: + Usage: required + Value type: + Definition: Should contain "ref" and "sleep" for the reference and sleep + clocks respectively + +- resets: + Usage: required + Value type: + Definition: Should contain the phy and POR resets + +- reset-names: + Usage: required + Value type: + Definition: Should contain "phy" and "por" for the phy and POR resets + respectively + +- v3p3-supply: + Usage: required + Value type: + Definition: Should contain a reference to the 3.3V supply + +- v1p8-supply: + Usage: required + Value type: + Definition: Should contain a reference to the 1.8V supply + +- qcom,init-seq: + Usage: optional + Value type: + Definition: Should contain a sequence of ULPI register and address pairs to + program into the ULPI_EXT_VENDOR_SPECIFIC area. This is related + to Device Mode Eye Diagram test. + +EXAMPLE + +otg: usb-controller { + ulpi { + phy { + compatible = "qcom,usb-hs-phy"; + ulpi-vendor = /bits/ 16 <0x05c6>; + ulpi-product = /bits/ 16 <0x0000>; + #phy-cells = <0>; + clocks = <&xo_board>, <&gcc GCC_USB2A_PHY_SLEEP_CLK>; + clock-names = "ref", "sleep"; + resets = <&gcc GCC_USB2A_PHY_BCR>, <&otg 0>; + reset-names = "phy", "por"; + v3p3-supply = <&pm8941_l24>; + v1p8-supply = <&pm8941_l6>; + qcom,init-seq = /bits/ 8 <0x81 0x63>; + }; + }; +}; diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index a2866949dc97..cfb3ded0896d 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -406,6 +406,14 @@ config PHY_QCOM_UFS help Support for UFS PHY on QCOM chipsets. +config PHY_QCOM_USB_HS + tristate "Qualcomm USB HS PHY module" + depends on USB_ULPI_BUS + select GENERIC_PHY + help + Support for the USB high-speed ULPI compliant phy on Qualcomm + chipsets. + config PHY_QCOM_USB_HSIC tristate "Qualcomm USB HSIC ULPI PHY module" depends on USB_ULPI_BUS diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 982e84a290ec..21435fc0b656 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -49,6 +49,7 @@ obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-20nm.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o +obj-$(CONFIG_PHY_QCOM_USB_HS) += phy-qcom-usb-hs.o obj-$(CONFIG_PHY_QCOM_USB_HSIC) += phy-qcom-usb-hsic.o obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o diff --git a/drivers/phy/phy-qcom-usb-hs.c b/drivers/phy/phy-qcom-usb-hs.c new file mode 100644 index 000000000000..0585f7bce920 --- /dev/null +++ b/drivers/phy/phy-qcom-usb-hs.c @@ -0,0 +1,295 @@ +/** + * Copyright (C) 2016 Linaro Ltd + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ulpi_phy.h" + +#define ULPI_PWR_CLK_MNG_REG 0x88 +# define ULPI_PWR_OTG_COMP_DISABLE BIT(0) + +#define ULPI_MISC_A 0x96 +# define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1) +# define ULPI_MISC_A_VBUSVLDEXT BIT(0) + + +struct ulpi_seq { + u8 addr; + u8 val; +}; + +struct qcom_usb_hs_phy { + struct ulpi *ulpi; + struct phy *phy; + struct clk *ref_clk; + struct clk *sleep_clk; + struct regulator *v1p8; + struct regulator *v3p3; + struct reset_control *reset; + struct ulpi_seq *init_seq; + struct notifier_block vbus_notify; + struct extcon_dev *vbus_edev; + struct extcon_dev *id_edev; + enum usb_dr_mode dr_mode; +}; + +static int +qcom_usb_hs_phy_vbus_notifier(struct notifier_block *nb, unsigned long event, + void *ptr) +{ + struct qcom_usb_hs_phy *uphy; + int is_host; + u8 addr; + + uphy = container_of(nb, struct qcom_usb_hs_phy, vbus_notify); + is_host = extcon_get_cable_state_(uphy->id_edev, EXTCON_USB_HOST); + if (is_host < 0) + is_host = 0; /* No id event means always a peripheral */ + + if (event && !is_host) + addr = ULPI_SET(ULPI_MISC_A); + else + addr = ULPI_CLR(ULPI_MISC_A); + + return ulpi_write(uphy->ulpi, addr, + ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT); +} + +static int qcom_usb_hs_phy_power_on(struct phy *phy) +{ + struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy); + struct ulpi *ulpi = uphy->ulpi; + const struct ulpi_seq *seq; + int ret, state; + + ret = clk_prepare_enable(uphy->ref_clk); + if (ret) + return ret; + + ret = clk_prepare_enable(uphy->sleep_clk); + if (ret) + goto err_sleep; + + ret = regulator_set_voltage(uphy->v1p8, 1800000, 1800000); + if (ret) + goto err_1p8; + ret = regulator_set_load(uphy->v1p8, 50000); + if (ret < 0) + goto err_1p8; + + ret = regulator_enable(uphy->v1p8); + if (ret) + goto err_1p8; + + ret = regulator_set_voltage_triplet(uphy->v3p3, 3050000, 3300000, + 3300000); + if (ret) + goto err_3p3; + + ret = regulator_set_load(uphy->v3p3, 50000); + if (ret < 0) + goto err_3p3; + + ret = regulator_enable(uphy->v3p3); + if (ret) + goto err_3p3; + + for (seq = uphy->init_seq; seq->addr; seq++) { + ret = ulpi_write(ulpi, seq->addr, seq->val); + if (ret) + goto err_ulpi; + } + + if (uphy->reset) { + ret = reset_control_reset(uphy->reset); + if (ret) + goto err_ulpi; + } + + if (uphy->vbus_edev) { + ulpi_write(ulpi, ULPI_SET(ULPI_PWR_CLK_MNG_REG), + ULPI_PWR_OTG_COMP_DISABLE); + state = extcon_get_cable_state_(uphy->vbus_edev, EXTCON_USB); + /* setup initial state */ + qcom_usb_hs_phy_vbus_notifier(&uphy->vbus_notify, state, + uphy->vbus_edev); + ret = extcon_register_notifier(uphy->vbus_edev, EXTCON_USB, + &uphy->vbus_notify); + if (ret) + return ret; + } else { + u8 val; + + switch (uphy->dr_mode) { + case USB_DR_MODE_OTG: + val = ULPI_INT_IDGRD; + case USB_DR_MODE_PERIPHERAL: + val |= ULPI_INT_SESS_VALID; + break; + default: + val = 0; + } + + ret = ulpi_write(ulpi, ULPI_USB_INT_EN_RISE, val); + if (ret) + goto err_ulpi; + ret = ulpi_write(ulpi, ULPI_USB_INT_EN_FALL, val); + if (ret) + goto err_ulpi; + } + + return 0; +err_ulpi: + regulator_disable(uphy->v3p3); +err_3p3: + regulator_disable(uphy->v1p8); +err_1p8: + clk_disable_unprepare(uphy->sleep_clk); +err_sleep: + clk_disable_unprepare(uphy->ref_clk); + return ret; +} + +static int qcom_usb_hs_phy_power_off(struct phy *phy) +{ + int ret; + struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy); + + if (uphy->vbus_edev) { + ret = extcon_unregister_notifier(uphy->vbus_edev, EXTCON_USB, + &uphy->vbus_notify); + if (ret) + return ret; + } + + regulator_disable(uphy->v3p3); + regulator_disable(uphy->v1p8); + clk_disable_unprepare(uphy->sleep_clk); + clk_disable_unprepare(uphy->ref_clk); + + return 0; +} + +static const struct phy_ops qcom_usb_hs_phy_ops = { + .power_on = qcom_usb_hs_phy_power_on, + .power_off = qcom_usb_hs_phy_power_off, + .owner = THIS_MODULE, +}; + +static int qcom_usb_hs_phy_probe(struct ulpi *ulpi) +{ + struct qcom_usb_hs_phy *uphy; + struct phy_provider *p; + struct clk *clk; + struct regulator *reg; + struct reset_control *reset; + int size; + int ret; + + uphy = devm_kzalloc(&ulpi->dev, sizeof(*uphy), GFP_KERNEL); + if (!uphy) + return -ENOMEM; + ulpi_set_drvdata(ulpi, uphy); + uphy->ulpi = ulpi; + uphy->dr_mode = of_usb_get_dr_mode_by_phy(ulpi->dev.of_node); + + size = of_property_count_u8_elems(ulpi->dev.of_node, "qcom,init-seq"); + if (size < 0) + size = 0; + uphy->init_seq = devm_kmalloc_array(&ulpi->dev, (size / 2) + 1, + sizeof(*uphy->init_seq), GFP_KERNEL); + if (!uphy->init_seq) + return -ENOMEM; + ret = of_property_read_u8_array(ulpi->dev.of_node, "qcom,init-seq", + (u8 *)uphy->init_seq, size); + if (ret && size) + return ret; + /* NUL terminate */ + uphy->init_seq[size / 2].addr = uphy->init_seq[size / 2].val = 0; + + uphy->ref_clk = clk = devm_clk_get(&ulpi->dev, "ref"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + uphy->sleep_clk = clk = devm_clk_get(&ulpi->dev, "sleep"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + uphy->v1p8 = reg = devm_regulator_get(&ulpi->dev, "v1p8"); + if (IS_ERR(reg)) + return PTR_ERR(reg); + + uphy->v3p3 = reg = devm_regulator_get(&ulpi->dev, "v3p3"); + if (IS_ERR(reg)) + return PTR_ERR(reg); + + uphy->reset = reset = devm_reset_control_get(&ulpi->dev, "por"); + if (IS_ERR(reset)) { + if (PTR_ERR(reset) == -EPROBE_DEFER) + return PTR_ERR(reset); + uphy->reset = NULL; + } + + uphy->phy = devm_phy_create(&ulpi->dev, ulpi->dev.of_node, + &qcom_usb_hs_phy_ops); + if (IS_ERR(uphy->phy)) + return PTR_ERR(uphy->phy); + + uphy->vbus_edev = extcon_get_edev_by_phandle(&ulpi->dev, 0); + if (IS_ERR(uphy->vbus_edev)) { + if (PTR_ERR(uphy->vbus_edev) != -ENODEV) + return PTR_ERR(uphy->vbus_edev); + uphy->vbus_edev = NULL; + } + + uphy->id_edev = extcon_get_edev_by_phandle(&ulpi->dev, 1); + if (IS_ERR(uphy->id_edev)) { + if (PTR_ERR(uphy->id_edev) != -ENODEV) + return PTR_ERR(uphy->id_edev); + uphy->id_edev = NULL; + } + + uphy->vbus_notify.notifier_call = qcom_usb_hs_phy_vbus_notifier; + phy_set_drvdata(uphy->phy, uphy); + + p = devm_of_phy_provider_register(&ulpi->dev, of_phy_simple_xlate); + return PTR_ERR_OR_ZERO(p); +} + +static const struct of_device_id qcom_usb_hs_phy_match[] = { + { .compatible = "qcom,usb-hs-phy", }, + { } +}; +MODULE_DEVICE_TABLE(of, qcom_usb_hs_phy_match); + +static const struct ulpi_device_id qcom_usb_hs_ulpi_id[] = { + { 0x05c6, 0x0, }, + { }, +}; +MODULE_DEVICE_TABLE(ulpi, qcom_usb_hs_ulpi_id); + +static struct ulpi_driver qcom_usb_hs_phy_driver = { + .id_table = qcom_usb_hs_ulpi_id, + .probe = qcom_usb_hs_phy_probe, + .driver = { + .name = "qcom_usb_hs_phy", + .of_match_table = qcom_usb_hs_phy_match, + }, +}; +module_ulpi_driver(qcom_usb_hs_phy_driver); + +MODULE_DESCRIPTION("Qualcomm USB HS phy"); +MODULE_LICENSE("GPL v2");