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openwrt/target/linux/ath79/patches-4.14/0004-phy-add-ath79-usb-phys...

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From 08c9d6ceef01893678a5d2e8a15517c745417f21 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Tue, 6 Mar 2018 10:04:05 +0100
Subject: [PATCH 04/27] phy: add ath79 usb phys
Signed-off-by: John Crispin <john@phrozen.org>
---
drivers/phy/Kconfig | 16 ++++++
drivers/phy/Makefile | 2 +
drivers/phy/phy-ar7100-usb.c | 124 +++++++++++++++++++++++++++++++++++++++++++
drivers/phy/phy-ar7200-usb.c | 108 +++++++++++++++++++++++++++++++++++++
4 files changed, 250 insertions(+)
create mode 100644 drivers/phy/phy-ar7100-usb.c
create mode 100644 drivers/phy/phy-ar7200-usb.c
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -15,6 +15,22 @@ config GENERIC_PHY
phy users can obtain reference to the PHY. All the users of this
framework should select this config.
+config PHY_AR7100_USB
+ tristate "Atheros AR7100 USB PHY driver"
+ depends on ATH79 || COMPILE_TEST
+ default y if USB_EHCI_HCD_PLATFORM
+ select PHY_SIMPLE
+ help
+ Enable this to support the USB PHY on Atheros AR7100 SoCs.
+
+config PHY_AR7200_USB
+ tristate "Atheros AR7200 USB PHY driver"
+ depends on ATH79 || COMPILE_TEST
+ default y if USB_EHCI_HCD_PLATFORM
+ select PHY_SIMPLE
+ help
+ Enable this to support the USB PHY on Atheros AR7200 SoCs.
+
config PHY_LPC18XX_USB_OTG
tristate "NXP LPC18xx/43xx SoC USB OTG PHY driver"
depends on OF && (ARCH_LPC18XX || COMPILE_TEST)
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -4,6 +4,8 @@
#
obj-$(CONFIG_GENERIC_PHY) += phy-core.o
+obj-$(CONFIG_PHY_AR7100_USB) += phy-ar7100-usb.o
+obj-$(CONFIG_PHY_AR7200_USB) += phy-ar7200-usb.o
obj-$(CONFIG_PHY_LPC18XX_USB_OTG) += phy-lpc18xx-usb-otg.o
obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
--- /dev/null
+++ b/drivers/phy/phy-ar7100-usb.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2018 John Crispin <john@phrozen.org>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/delay.h>
+#include <linux/reset.h>
+#include <linux/of_gpio.h>
+
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+struct ar7100_usb_phy {
+ struct reset_control *rst_phy;
+ struct reset_control *rst_host;
+ struct reset_control *rst_ohci_dll;
+ void __iomem *io_base;
+ struct phy *phy;
+ int gpio;
+};
+
+static int ar7100_usb_phy_power_off(struct phy *phy)
+{
+ struct ar7100_usb_phy *priv = phy_get_drvdata(phy);
+ int err = 0;
+
+ err |= reset_control_assert(priv->rst_host);
+ err |= reset_control_assert(priv->rst_phy);
+ err |= reset_control_assert(priv->rst_ohci_dll);
+
+ return err;
+}
+
+static int ar7100_usb_phy_power_on(struct phy *phy)
+{
+ struct ar7100_usb_phy *priv = phy_get_drvdata(phy);
+ int err = 0;
+
+ err |= ar7100_usb_phy_power_off(phy);
+ mdelay(100);
+ err |= reset_control_deassert(priv->rst_ohci_dll);
+ err |= reset_control_deassert(priv->rst_phy);
+ err |= reset_control_deassert(priv->rst_host);
+ mdelay(500);
+ iowrite32(0xf0000, priv->io_base + AR71XX_USB_CTRL_REG_CONFIG);
+ iowrite32(0x20c00, priv->io_base + AR71XX_USB_CTRL_REG_FLADJ);
+
+ return err;
+}
+
+static const struct phy_ops ar7100_usb_phy_ops = {
+ .power_on = ar7100_usb_phy_power_on,
+ .power_off = ar7100_usb_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int ar7100_usb_phy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct resource *res;
+ struct ar7100_usb_phy *priv;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->io_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(priv->io_base))
+ return PTR_ERR(priv->io_base);
+
+ priv->rst_phy = devm_reset_control_get(&pdev->dev, "usb-phy");
+ if (IS_ERR(priv->rst_phy)) {
+ dev_err(&pdev->dev, "phy reset is missing\n");
+ return PTR_ERR(priv->rst_phy);
+ }
+
+ priv->rst_host = devm_reset_control_get(&pdev->dev, "usb-host");
+ if (IS_ERR(priv->rst_host)) {
+ dev_err(&pdev->dev, "host reset is missing\n");
+ return PTR_ERR(priv->rst_host);
+ }
+
+ priv->rst_ohci_dll = devm_reset_control_get(&pdev->dev, "usb-ohci-dll");
+ if (IS_ERR(priv->rst_ohci_dll)) {
+ dev_err(&pdev->dev, "ohci-dll reset is missing\n");
+ return PTR_ERR(priv->rst_host);
+ }
+
+ priv->phy = devm_phy_create(&pdev->dev, NULL, &ar7100_usb_phy_ops);
+ if (IS_ERR(priv->phy)) {
+ dev_err(&pdev->dev, "failed to create PHY\n");
+ return PTR_ERR(priv->phy);
+ }
+
+ priv->gpio = of_get_gpio(pdev->dev.of_node, 0);
+ if (priv->gpio >= 0) {
+ int ret = devm_gpio_request(&pdev->dev, priv->gpio, dev_name(&pdev->dev));
+
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request gpio\n");
+ return ret;
+ }
+ gpio_export_with_name(priv->gpio, 0, dev_name(&pdev->dev));
+ gpio_set_value(priv->gpio, 1);
+ }
+
+ phy_set_drvdata(priv->phy, priv);
+
+ phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
+
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id ar7100_usb_phy_of_match[] = {
+ { .compatible = "qca,ar7100-usb-phy" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ar7100_usb_phy_of_match);
+
+static struct platform_driver ar7100_usb_phy_driver = {
+ .probe = ar7100_usb_phy_probe,
+ .driver = {
+ .of_match_table = ar7100_usb_phy_of_match,
+ .name = "ar7100-usb-phy",
+ }
+};
+module_platform_driver(ar7100_usb_phy_driver);
+
+MODULE_DESCRIPTION("ATH79 USB PHY driver");
+MODULE_AUTHOR("Alban Bedel <albeu@free.fr>");
+MODULE_LICENSE("GPL");
--- /dev/null
+++ b/drivers/phy/phy-ar7200-usb.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2015 Alban Bedel <albeu@free.fr>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/reset.h>
+#include <linux/of_gpio.h>
+
+struct ar7200_usb_phy {
+ struct reset_control *rst_phy;
+ struct reset_control *rst_phy_analog;
+ struct reset_control *suspend_override;
+ struct phy *phy;
+ int gpio;
+};
+
+static int ar7200_usb_phy_power_on(struct phy *phy)
+{
+ struct ar7200_usb_phy *priv = phy_get_drvdata(phy);
+ int err = 0;
+
+ if (priv->suspend_override)
+ err = reset_control_assert(priv->suspend_override);
+ if (priv->rst_phy)
+ err |= reset_control_deassert(priv->rst_phy);
+ if (priv->rst_phy_analog)
+ err |= reset_control_deassert(priv->rst_phy_analog);
+
+ return err;
+}
+
+static int ar7200_usb_phy_power_off(struct phy *phy)
+{
+ struct ar7200_usb_phy *priv = phy_get_drvdata(phy);
+ int err = 0;
+
+ if (priv->suspend_override)
+ err = reset_control_deassert(priv->suspend_override);
+ if (priv->rst_phy)
+ err |= reset_control_assert(priv->rst_phy);
+ if (priv->rst_phy_analog)
+ err |= reset_control_assert(priv->rst_phy_analog);
+
+ return err;
+}
+
+static const struct phy_ops ar7200_usb_phy_ops = {
+ .power_on = ar7200_usb_phy_power_on,
+ .power_off = ar7200_usb_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int ar7200_usb_phy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct ar7200_usb_phy *priv;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->rst_phy = devm_reset_control_get(&pdev->dev, "usb-phy");
+ if (IS_ERR(priv->rst_phy)) {
+ dev_err(&pdev->dev, "phy reset is missing\n");
+ return PTR_ERR(priv->rst_phy);
+ }
+
+ priv->rst_phy_analog = devm_reset_control_get_optional(
+ &pdev->dev, "usb-phy-analog");
+ if (IS_ERR(priv->rst_phy_analog)) {
+ if (PTR_ERR(priv->rst_phy_analog) == -ENOENT)
+ priv->rst_phy_analog = NULL;
+ else
+ return PTR_ERR(priv->rst_phy_analog);
+ }
+
+ priv->suspend_override = devm_reset_control_get_optional(
+ &pdev->dev, "usb-suspend-override");
+ if (IS_ERR(priv->suspend_override)) {
+ if (PTR_ERR(priv->suspend_override) == -ENOENT)
+ priv->suspend_override = NULL;
+ else
+ return PTR_ERR(priv->suspend_override);
+ }
+
+ priv->phy = devm_phy_create(&pdev->dev, NULL, &ar7200_usb_phy_ops);
+ if (IS_ERR(priv->phy)) {
+ dev_err(&pdev->dev, "failed to create PHY\n");
+ return PTR_ERR(priv->phy);
+ }
+
+ priv->gpio = of_get_gpio(pdev->dev.of_node, 0);
+ if (priv->gpio >= 0) {
+ int ret = devm_gpio_request(&pdev->dev, priv->gpio, dev_name(&pdev->dev));
+
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request gpio\n");
+ return ret;
+ }
+ gpio_export_with_name(priv->gpio, 0, dev_name(&pdev->dev));
+ gpio_set_value(priv->gpio, 1);
+ }
+
+ phy_set_drvdata(priv->phy, priv);
+
+ phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id ar7200_usb_phy_of_match[] = {
+ { .compatible = "qca,ar7200-usb-phy" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ar7200_usb_phy_of_match);
+
+static struct platform_driver ar7200_usb_phy_driver = {
+ .probe = ar7200_usb_phy_probe,
+ .driver = {
+ .of_match_table = ar7200_usb_phy_of_match,
+ .name = "ar7200-usb-phy",
+ }
+};
+module_platform_driver(ar7200_usb_phy_driver);
+
+MODULE_DESCRIPTION("ATH79 USB PHY driver");
+MODULE_AUTHOR("Alban Bedel <albeu@free.fr>");
+MODULE_LICENSE("GPL");
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