usb: chipidea: add imx platform driver
This patch supports only the host-mode functionality so far. Signed-off-by: Richard Zhao <richard.zhao@freescale.com> Signed-off-by: Marek Vasut <marex@denx.de> Cc: Peter Chen <peter.chen@freescale.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Felipe Balbi <balbi@ti.com> Tested-by: Subodh Nijsure <snijsure@grid-net.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>hifive-unleashed-5.1
Richard Zhao
Greg Kroah-Hartman
parent
b3d9968122
commit
1530280084
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@ -0,0 +1,18 @@
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* Freescale i.MX ci13xxx usb controllers
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Required properties:
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- compatible: Should be "fsl,imx27-usb"
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- reg: Should contain registers location and length
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- interrupts: Should contain controller interrupt
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Optional properties:
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- fsl,usbphy: phandler of usb phy that connects to the only one port
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- vbus-supply: regulator for vbus
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Examples:
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usb@02184000 { /* USB OTG */
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compatible = "fsl,imx6q-usb", "fsl,imx27-usb";
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reg = <0x02184000 0x200>;
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interrupts = <0 43 0x04>;
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fsl,usbphy = <&usbphy1>;
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};
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@ -14,3 +14,6 @@ ifneq ($(CONFIG_PCI),)
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obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_pci.o
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endif
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ifneq ($(CONFIG_OF_DEVICE),)
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obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_imx.o
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endif
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@ -0,0 +1,198 @@
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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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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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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/of_gpio.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/dma-mapping.h>
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#include <linux/usb/chipidea.h>
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#include <linux/clk.h>
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#include <linux/regulator/consumer.h>
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#include "ci.h"
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#define pdev_to_phy(pdev) \
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((struct usb_phy *)platform_get_drvdata(pdev))
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struct ci13xxx_imx_data {
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struct device_node *phy_np;
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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 regulator *reg_vbus;
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};
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static struct ci13xxx_platform_data ci13xxx_imx_platdata __devinitdata = {
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.name = "ci13xxx_imx",
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.flags = CI13XXX_REQUIRE_TRANSCEIVER |
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CI13XXX_PULLUP_ON_VBUS |
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CI13XXX_DISABLE_STREAMING,
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.capoffset = DEF_CAPOFFSET,
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};
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static int __devinit ci13xxx_imx_probe(struct platform_device *pdev)
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{
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struct ci13xxx_imx_data *data;
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struct platform_device *plat_ci, *phy_pdev;
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struct device_node *phy_np;
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struct resource *res;
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struct regulator *reg_vbus;
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int ret;
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data) {
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dev_err(&pdev->dev, "Failed to allocate CI13xxx-IMX data!\n");
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return -ENOMEM;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "Can't get device resources!\n");
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return -ENOENT;
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}
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data->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(data->clk)) {
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dev_err(&pdev->dev,
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"Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
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return PTR_ERR(data->clk);
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}
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ret = clk_prepare_enable(data->clk);
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if (ret) {
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dev_err(&pdev->dev,
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"Failed to prepare or enable clock, err=%d\n", ret);
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return ret;
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}
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phy_np = of_parse_phandle(pdev->dev.of_node, "fsl,usbphy", 0);
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if (phy_np) {
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data->phy_np = phy_np;
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phy_pdev = of_find_device_by_node(phy_np);
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if (phy_pdev) {
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struct usb_phy *phy;
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phy = pdev_to_phy(phy_pdev);
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if (phy &&
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try_module_get(phy_pdev->dev.driver->owner)) {
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usb_phy_init(phy);
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data->phy = phy;
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}
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}
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}
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/* we only support host now, so enable vbus here */
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reg_vbus = devm_regulator_get(&pdev->dev, "vbus");
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if (!IS_ERR(reg_vbus)) {
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ret = regulator_enable(reg_vbus);
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if (ret) {
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dev_err(&pdev->dev,
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"Failed to enable vbus regulator, err=%d\n",
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ret);
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goto put_np;
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}
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data->reg_vbus = reg_vbus;
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} else {
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reg_vbus = NULL;
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}
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ci13xxx_imx_platdata.phy = data->phy;
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if (!pdev->dev.dma_mask) {
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pdev->dev.dma_mask = devm_kzalloc(&pdev->dev,
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sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
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if (!pdev->dev.dma_mask) {
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ret = -ENOMEM;
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dev_err(&pdev->dev, "Failed to alloc dma_mask!\n");
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goto err;
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}
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*pdev->dev.dma_mask = DMA_BIT_MASK(32);
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dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask);
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}
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plat_ci = ci13xxx_add_device(&pdev->dev,
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pdev->resource, pdev->num_resources,
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&ci13xxx_imx_platdata);
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if (IS_ERR(plat_ci)) {
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ret = PTR_ERR(plat_ci);
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dev_err(&pdev->dev,
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"Can't register ci_hdrc platform device, err=%d\n",
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ret);
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goto err;
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}
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data->ci_pdev = plat_ci;
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platform_set_drvdata(pdev, data);
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pm_runtime_no_callbacks(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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return 0;
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err:
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if (reg_vbus)
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regulator_disable(reg_vbus);
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put_np:
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if (phy_np)
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of_node_put(phy_np);
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clk_disable_unprepare(data->clk);
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return ret;
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}
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static int __devexit ci13xxx_imx_remove(struct platform_device *pdev)
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{
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struct ci13xxx_imx_data *data = platform_get_drvdata(pdev);
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pm_runtime_disable(&pdev->dev);
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ci13xxx_remove_device(data->ci_pdev);
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if (data->reg_vbus)
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regulator_disable(data->reg_vbus);
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if (data->phy) {
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usb_phy_shutdown(data->phy);
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module_put(data->phy->dev->driver->owner);
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}
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of_node_put(data->phy_np);
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clk_disable_unprepare(data->clk);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static const struct of_device_id ci13xxx_imx_dt_ids[] = {
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{ .compatible = "fsl,imx27-usb", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, ci13xxx_imx_dt_ids);
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static struct platform_driver ci13xxx_imx_driver = {
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.probe = ci13xxx_imx_probe,
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.remove = __devexit_p(ci13xxx_imx_remove),
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.driver = {
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.name = "imx_usb",
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.owner = THIS_MODULE,
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.of_match_table = ci13xxx_imx_dt_ids,
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},
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};
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module_platform_driver(ci13xxx_imx_driver);
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MODULE_ALIAS("platform:imx-usb");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("CI13xxx i.MX USB binding");
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MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
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MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
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