Fixed MTP to work with TWRP

drivers/usb/chipidea/ci_hdrc_imx.c

@@ -0,0 +1,229 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2012 Marek Vasut <marex@denx.de>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/dma-mapping.h>
+#include <linux/usb/chipidea.h>
+#include <linux/clk.h>
+
+#include "ci.h"
+#include "ci_hdrc_imx.h"
+
+#define CI_HDRC_IMX_IMX28_WRITE_FIX BIT(0)
+
+struct ci_hdrc_imx_platform_flag {
+	unsigned int flags;
+};
+
+static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
+};
+
+static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
+	.flags = CI_HDRC_IMX_IMX28_WRITE_FIX,
+};
+
+static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
+	{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
+	{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
+
+struct ci_hdrc_imx_data {
+	struct usb_phy *phy;
+	struct platform_device *ci_pdev;
+	struct clk *clk;
+	struct imx_usbmisc_data *usbmisc_data;
+};
+
+/* Common functions shared by usbmisc drivers */
+
+static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
+{
+	struct platform_device *misc_pdev;
+	struct device_node *np = dev->of_node;
+	struct of_phandle_args args;
+	struct imx_usbmisc_data *data;
+	int ret;
+
+	/*
+	 * In case the fsl,usbmisc property is not present this device doesn't
+	 * need usbmisc. Return NULL (which is no error here)
+	 */
+	if (!of_get_property(np, "fsl,usbmisc", NULL))
+		return NULL;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return ERR_PTR(-ENOMEM);
+
+	ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
+					0, &args);
+	if (ret) {
+		dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
+			ret);
+		return ERR_PTR(ret);
+	}
+
+	data->index = args.args[0];
+
+	misc_pdev = of_find_device_by_node(args.np);
+	of_node_put(args.np);
+
+	if (!misc_pdev)
+		return ERR_PTR(-EPROBE_DEFER);
+
+	data->dev = &misc_pdev->dev;
+
+	if (of_find_property(np, "disable-over-current", NULL))
+		data->disable_oc = 1;
+
+	if (of_find_property(np, "external-vbus-divider", NULL))
+		data->evdo = 1;
+
+	return data;
+}
+
+/* End of common functions shared by usbmisc drivers*/
+
+static int ci_hdrc_imx_probe(struct platform_device *pdev)
+{
+	struct ci_hdrc_imx_data *data;
+	struct ci_hdrc_platform_data pdata = {
+		.name		= dev_name(&pdev->dev),
+		.capoffset	= DEF_CAPOFFSET,
+		.flags		= CI_HDRC_REQUIRE_TRANSCEIVER |
+				  CI_HDRC_DISABLE_STREAMING,
+	};
+	int ret;
+	const struct of_device_id *of_id =
+			of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
+	const struct ci_hdrc_imx_platform_flag *imx_platform_flag = of_id->data;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
+		return -ENOMEM;
+	}
+
+	data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
+	if (IS_ERR(data->usbmisc_data))
+		return PTR_ERR(data->usbmisc_data);
+
+	data->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(data->clk)) {
+		dev_err(&pdev->dev,
+			"Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
+		return PTR_ERR(data->clk);
+	}
+
+	ret = clk_prepare_enable(data->clk);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to prepare or enable clock, err=%d\n", ret);
+		return ret;
+	}
+
+	data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
+	if (IS_ERR(data->phy)) {
+		ret = PTR_ERR(data->phy);
+		/* Return -EINVAL if no usbphy is available */
+		if (ret == -ENODEV)
+			ret = -EINVAL;
+		goto err_clk;
+	}
+
+	pdata.phy = data->phy;
+
+	if (imx_platform_flag->flags & CI_HDRC_IMX_IMX28_WRITE_FIX)
+		pdata.flags |= CI_HDRC_IMX28_WRITE_FIX;
+
+	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		goto err_clk;
+
+	if (data->usbmisc_data) {
+		ret = imx_usbmisc_init(data->usbmisc_data);
+		if (ret) {
+			dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n",
+					ret);
+			goto err_clk;
+		}
+	}
+
+	data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
+				pdev->resource, pdev->num_resources,
+				&pdata);
+	if (IS_ERR(data->ci_pdev)) {
+		ret = PTR_ERR(data->ci_pdev);
+		dev_err(&pdev->dev,
+			"Can't register ci_hdrc platform device, err=%d\n",
+			ret);
+		goto err_clk;
+	}
+
+	if (data->usbmisc_data) {
+		ret = imx_usbmisc_init_post(data->usbmisc_data);
+		if (ret) {
+			dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n",
+					ret);
+			goto disable_device;
+		}
+	}
+
+	platform_set_drvdata(pdev, data);
+
+	pm_runtime_no_callbacks(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+
+disable_device:
+	ci_hdrc_remove_device(data->ci_pdev);
+err_clk:
+	clk_disable_unprepare(data->clk);
+	return ret;
+}
+
+static int ci_hdrc_imx_remove(struct platform_device *pdev)
+{
+	struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(&pdev->dev);
+	ci_hdrc_remove_device(data->ci_pdev);
+	clk_disable_unprepare(data->clk);
+
+	return 0;
+}
+
+static struct platform_driver ci_hdrc_imx_driver = {
+	.probe = ci_hdrc_imx_probe,
+	.remove = ci_hdrc_imx_remove,
+	.driver = {
+		.name = "imx_usb",
+		.owner = THIS_MODULE,
+		.of_match_table = ci_hdrc_imx_dt_ids,
+	 },
+};
+
+module_platform_driver(ci_hdrc_imx_driver);
+
+MODULE_ALIAS("platform:imx-usb");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");