611 lines
15 KiB
C
611 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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* Copyright (C) 2012 Marek Vasut <marex@denx.de>
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* on behalf of DENX Software Engineering GmbH
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*/
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/usb/chipidea.h>
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#include <linux/usb/of.h>
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#include <linux/clk.h>
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#include <linux/pinctrl/consumer.h>
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#include "ci.h"
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#include "ci_hdrc_imx.h"
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struct ci_hdrc_imx_platform_flag {
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unsigned int flags;
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};
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static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
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.flags = CI_HDRC_TURN_VBUS_EARLY_ON |
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CI_HDRC_DISABLE_STREAMING,
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};
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static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
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.flags = CI_HDRC_DISABLE_STREAMING,
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};
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static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
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.flags = CI_HDRC_IMX28_WRITE_FIX |
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CI_HDRC_TURN_VBUS_EARLY_ON |
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CI_HDRC_DISABLE_STREAMING,
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};
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static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
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.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
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CI_HDRC_TURN_VBUS_EARLY_ON |
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CI_HDRC_DISABLE_STREAMING,
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};
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static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
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.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
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CI_HDRC_TURN_VBUS_EARLY_ON |
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CI_HDRC_DISABLE_HOST_STREAMING,
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};
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static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
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.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
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CI_HDRC_TURN_VBUS_EARLY_ON |
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CI_HDRC_DISABLE_HOST_STREAMING,
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};
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static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
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.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
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CI_HDRC_TURN_VBUS_EARLY_ON,
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};
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static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
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.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
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};
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static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
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{ .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
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{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
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{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
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{ .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
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{ .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
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{ .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
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{ .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
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{ .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
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struct ci_hdrc_imx_data {
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struct usb_phy *phy;
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struct platform_device *ci_pdev;
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struct clk *clk;
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struct imx_usbmisc_data *usbmisc_data;
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bool supports_runtime_pm;
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bool override_phy_control;
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bool in_lpm;
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struct pinctrl *pinctrl;
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struct pinctrl_state *pinctrl_hsic_active;
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struct regulator *hsic_pad_regulator;
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/* SoC before i.mx6 (except imx23/imx28) needs three clks */
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bool need_three_clks;
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struct clk *clk_ipg;
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struct clk *clk_ahb;
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struct clk *clk_per;
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/* --------------------------------- */
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};
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/* Common functions shared by usbmisc drivers */
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static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
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{
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struct platform_device *misc_pdev;
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struct device_node *np = dev->of_node;
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struct of_phandle_args args;
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struct imx_usbmisc_data *data;
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int ret;
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/*
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* In case the fsl,usbmisc property is not present this device doesn't
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* need usbmisc. Return NULL (which is no error here)
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*/
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if (!of_get_property(np, "fsl,usbmisc", NULL))
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return NULL;
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data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return ERR_PTR(-ENOMEM);
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ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
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0, &args);
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if (ret) {
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dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
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ret);
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return ERR_PTR(ret);
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}
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data->index = args.args[0];
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misc_pdev = of_find_device_by_node(args.np);
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of_node_put(args.np);
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if (!misc_pdev || !platform_get_drvdata(misc_pdev))
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return ERR_PTR(-EPROBE_DEFER);
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data->dev = &misc_pdev->dev;
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/*
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* Check the various over current related properties. If over current
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* detection is disabled we're not interested in the polarity.
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*/
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if (of_find_property(np, "disable-over-current", NULL)) {
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data->disable_oc = 1;
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} else if (of_find_property(np, "over-current-active-high", NULL)) {
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data->oc_pol_active_low = 0;
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data->oc_pol_configured = 1;
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} else if (of_find_property(np, "over-current-active-low", NULL)) {
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data->oc_pol_active_low = 1;
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data->oc_pol_configured = 1;
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} else {
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dev_warn(dev, "No over current polarity defined\n");
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}
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data->pwr_pol = of_property_read_bool(np, "power-active-high");
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data->evdo = of_property_read_bool(np, "external-vbus-divider");
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if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
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data->ulpi = 1;
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return data;
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}
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/* End of common functions shared by usbmisc drivers*/
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static int imx_get_clks(struct device *dev)
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{
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struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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int ret = 0;
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data->clk_ipg = devm_clk_get(dev, "ipg");
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if (IS_ERR(data->clk_ipg)) {
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/* If the platform only needs one clocks */
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data->clk = devm_clk_get(dev, NULL);
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if (IS_ERR(data->clk)) {
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ret = PTR_ERR(data->clk);
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dev_err(dev,
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"Failed to get clks, err=%ld,%ld\n",
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PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
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return ret;
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}
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return ret;
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}
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data->clk_ahb = devm_clk_get(dev, "ahb");
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if (IS_ERR(data->clk_ahb)) {
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ret = PTR_ERR(data->clk_ahb);
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dev_err(dev,
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"Failed to get ahb clock, err=%d\n", ret);
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return ret;
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}
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data->clk_per = devm_clk_get(dev, "per");
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if (IS_ERR(data->clk_per)) {
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ret = PTR_ERR(data->clk_per);
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dev_err(dev,
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"Failed to get per clock, err=%d\n", ret);
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return ret;
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}
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data->need_three_clks = true;
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return ret;
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}
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static int imx_prepare_enable_clks(struct device *dev)
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{
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struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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int ret = 0;
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if (data->need_three_clks) {
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ret = clk_prepare_enable(data->clk_ipg);
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if (ret) {
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dev_err(dev,
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"Failed to prepare/enable ipg clk, err=%d\n",
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ret);
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return ret;
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}
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ret = clk_prepare_enable(data->clk_ahb);
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if (ret) {
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dev_err(dev,
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"Failed to prepare/enable ahb clk, err=%d\n",
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ret);
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clk_disable_unprepare(data->clk_ipg);
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return ret;
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}
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ret = clk_prepare_enable(data->clk_per);
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if (ret) {
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dev_err(dev,
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"Failed to prepare/enable per clk, err=%d\n",
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ret);
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clk_disable_unprepare(data->clk_ahb);
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clk_disable_unprepare(data->clk_ipg);
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return ret;
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}
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} else {
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ret = clk_prepare_enable(data->clk);
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if (ret) {
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dev_err(dev,
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"Failed to prepare/enable clk, err=%d\n",
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ret);
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return ret;
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}
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}
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return ret;
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}
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static void imx_disable_unprepare_clks(struct device *dev)
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{
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struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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if (data->need_three_clks) {
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clk_disable_unprepare(data->clk_per);
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clk_disable_unprepare(data->clk_ahb);
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clk_disable_unprepare(data->clk_ipg);
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} else {
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clk_disable_unprepare(data->clk);
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}
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}
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static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
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{
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struct device *dev = ci->dev->parent;
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struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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int ret = 0;
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switch (event) {
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case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
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ret = pinctrl_select_state(data->pinctrl,
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data->pinctrl_hsic_active);
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if (ret)
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dev_err(dev, "hsic_active select failed, err=%d\n",
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ret);
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break;
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case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
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ret = imx_usbmisc_hsic_set_connect(data->usbmisc_data);
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if (ret)
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dev_err(dev,
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"hsic_set_connect failed, err=%d\n", ret);
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break;
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default:
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break;
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}
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return ret;
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}
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static int ci_hdrc_imx_probe(struct platform_device *pdev)
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{
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struct ci_hdrc_imx_data *data;
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struct ci_hdrc_platform_data pdata = {
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.name = dev_name(&pdev->dev),
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.capoffset = DEF_CAPOFFSET,
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.notify_event = ci_hdrc_imx_notify_event,
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};
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int ret;
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const struct of_device_id *of_id;
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const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
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struct device_node *np = pdev->dev.of_node;
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struct device *dev = &pdev->dev;
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struct pinctrl_state *pinctrl_hsic_idle;
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of_id = of_match_device(ci_hdrc_imx_dt_ids, dev);
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if (!of_id)
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return -ENODEV;
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imx_platform_flag = of_id->data;
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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platform_set_drvdata(pdev, data);
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data->usbmisc_data = usbmisc_get_init_data(dev);
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if (IS_ERR(data->usbmisc_data))
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return PTR_ERR(data->usbmisc_data);
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if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
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&& data->usbmisc_data) {
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pdata.flags |= CI_HDRC_IMX_IS_HSIC;
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data->usbmisc_data->hsic = 1;
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data->pinctrl = devm_pinctrl_get(dev);
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if (IS_ERR(data->pinctrl)) {
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dev_err(dev, "pinctrl get failed, err=%ld\n",
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PTR_ERR(data->pinctrl));
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return PTR_ERR(data->pinctrl);
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}
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pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
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if (IS_ERR(pinctrl_hsic_idle)) {
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dev_err(dev,
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"pinctrl_hsic_idle lookup failed, err=%ld\n",
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PTR_ERR(pinctrl_hsic_idle));
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return PTR_ERR(pinctrl_hsic_idle);
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}
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ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
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if (ret) {
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dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
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return ret;
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}
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data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
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"active");
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if (IS_ERR(data->pinctrl_hsic_active)) {
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dev_err(dev,
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"pinctrl_hsic_active lookup failed, err=%ld\n",
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PTR_ERR(data->pinctrl_hsic_active));
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return PTR_ERR(data->pinctrl_hsic_active);
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}
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data->hsic_pad_regulator = devm_regulator_get(dev, "hsic");
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if (PTR_ERR(data->hsic_pad_regulator) == -EPROBE_DEFER) {
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return -EPROBE_DEFER;
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} else if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
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/* no pad regualator is needed */
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data->hsic_pad_regulator = NULL;
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} else if (IS_ERR(data->hsic_pad_regulator)) {
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dev_err(dev, "Get HSIC pad regulator error: %ld\n",
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PTR_ERR(data->hsic_pad_regulator));
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return PTR_ERR(data->hsic_pad_regulator);
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}
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if (data->hsic_pad_regulator) {
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ret = regulator_enable(data->hsic_pad_regulator);
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if (ret) {
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dev_err(dev,
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"Failed to enable HSIC pad regulator\n");
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return ret;
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}
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}
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}
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ret = imx_get_clks(dev);
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if (ret)
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goto disable_hsic_regulator;
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ret = imx_prepare_enable_clks(dev);
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if (ret)
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goto disable_hsic_regulator;
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data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
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if (IS_ERR(data->phy)) {
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ret = PTR_ERR(data->phy);
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/* Return -EINVAL if no usbphy is available */
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if (ret == -ENODEV)
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ret = -EINVAL;
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goto err_clk;
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}
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pdata.usb_phy = data->phy;
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if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
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of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
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of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
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pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
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data->override_phy_control = true;
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usb_phy_init(pdata.usb_phy);
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}
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pdata.flags |= imx_platform_flag->flags;
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if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
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data->supports_runtime_pm = true;
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ret = imx_usbmisc_init(data->usbmisc_data);
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if (ret) {
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dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
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goto err_clk;
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}
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data->ci_pdev = ci_hdrc_add_device(dev,
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pdev->resource, pdev->num_resources,
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&pdata);
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if (IS_ERR(data->ci_pdev)) {
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ret = PTR_ERR(data->ci_pdev);
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "ci_hdrc_add_device failed, err=%d\n",
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ret);
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goto err_clk;
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}
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ret = imx_usbmisc_init_post(data->usbmisc_data);
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if (ret) {
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dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
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goto disable_device;
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}
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if (data->supports_runtime_pm) {
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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}
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device_set_wakeup_capable(dev, true);
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return 0;
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disable_device:
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ci_hdrc_remove_device(data->ci_pdev);
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err_clk:
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imx_disable_unprepare_clks(dev);
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disable_hsic_regulator:
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if (data->hsic_pad_regulator)
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ret = regulator_disable(data->hsic_pad_regulator);
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return ret;
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}
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static int ci_hdrc_imx_remove(struct platform_device *pdev)
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{
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struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
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if (data->supports_runtime_pm) {
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pm_runtime_get_sync(&pdev->dev);
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pm_runtime_disable(&pdev->dev);
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pm_runtime_put_noidle(&pdev->dev);
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}
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ci_hdrc_remove_device(data->ci_pdev);
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if (data->override_phy_control)
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usb_phy_shutdown(data->phy);
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imx_disable_unprepare_clks(&pdev->dev);
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if (data->hsic_pad_regulator)
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regulator_disable(data->hsic_pad_regulator);
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return 0;
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}
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static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
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{
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ci_hdrc_imx_remove(pdev);
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}
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static int __maybe_unused imx_controller_suspend(struct device *dev)
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{
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struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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int ret = 0;
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dev_dbg(dev, "at %s\n", __func__);
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ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, false);
|
|
if (ret) {
|
|
dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
imx_disable_unprepare_clks(dev);
|
|
data->in_lpm = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused imx_controller_resume(struct device *dev)
|
|
{
|
|
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
|
|
int ret = 0;
|
|
|
|
dev_dbg(dev, "at %s\n", __func__);
|
|
|
|
if (!data->in_lpm) {
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
ret = imx_prepare_enable_clks(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
data->in_lpm = false;
|
|
|
|
ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
|
|
if (ret) {
|
|
dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
|
|
goto clk_disable;
|
|
}
|
|
|
|
ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, true);
|
|
if (ret) {
|
|
dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
|
|
goto hsic_set_clk_fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
hsic_set_clk_fail:
|
|
imx_usbmisc_set_wakeup(data->usbmisc_data, true);
|
|
clk_disable:
|
|
imx_disable_unprepare_clks(dev);
|
|
return ret;
|
|
}
|
|
|
|
static int __maybe_unused ci_hdrc_imx_suspend(struct device *dev)
|
|
{
|
|
int ret;
|
|
|
|
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
|
|
|
|
if (data->in_lpm)
|
|
/* The core's suspend doesn't run */
|
|
return 0;
|
|
|
|
if (device_may_wakeup(dev)) {
|
|
ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
|
|
if (ret) {
|
|
dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return imx_controller_suspend(dev);
|
|
}
|
|
|
|
static int __maybe_unused ci_hdrc_imx_resume(struct device *dev)
|
|
{
|
|
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = imx_controller_resume(dev);
|
|
if (!ret && data->supports_runtime_pm) {
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_enable(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __maybe_unused ci_hdrc_imx_runtime_suspend(struct device *dev)
|
|
{
|
|
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
if (data->in_lpm) {
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
|
|
if (ret) {
|
|
dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return imx_controller_suspend(dev);
|
|
}
|
|
|
|
static int __maybe_unused ci_hdrc_imx_runtime_resume(struct device *dev)
|
|
{
|
|
return imx_controller_resume(dev);
|
|
}
|
|
|
|
static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
|
|
SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
|
|
ci_hdrc_imx_runtime_resume, NULL)
|
|
};
|
|
static struct platform_driver ci_hdrc_imx_driver = {
|
|
.probe = ci_hdrc_imx_probe,
|
|
.remove = ci_hdrc_imx_remove,
|
|
.shutdown = ci_hdrc_imx_shutdown,
|
|
.driver = {
|
|
.name = "imx_usb",
|
|
.of_match_table = ci_hdrc_imx_dt_ids,
|
|
.pm = &ci_hdrc_imx_pm_ops,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(ci_hdrc_imx_driver);
|
|
|
|
MODULE_ALIAS("platform:imx-usb");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
|
|
MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
|
|
MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
|