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https://github.com/edk2-porting/linux-next.git
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84bc70f94d
Due to having hardware tx buffers less than 512 bytes in size, streaming must be enabled on the Zynq for the udc to work at all. Add platform data specific to the Zynq udc, which does not set the CI_HDRC_DISABLE_STREAMING flag. Based on a patch by the same name from the Xilinx vendor tree. Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com> Signed-off-by: Peter Chen <peter.chen@freescale.com>
131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/*
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* Copyright (C) 2014 Marvell Technology Group Ltd.
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*
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* Antoine Tenart <antoine.tenart@free-electrons.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/clk.h>
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#include <linux/dma-mapping.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/usb/chipidea.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/ulpi.h>
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#include "ci.h"
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struct ci_hdrc_usb2_priv {
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struct platform_device *ci_pdev;
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struct clk *clk;
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};
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static const struct ci_hdrc_platform_data ci_default_pdata = {
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.capoffset = DEF_CAPOFFSET,
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.flags = CI_HDRC_DISABLE_STREAMING,
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};
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static struct ci_hdrc_platform_data ci_zynq_pdata = {
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.capoffset = DEF_CAPOFFSET,
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};
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static const struct of_device_id ci_hdrc_usb2_of_match[] = {
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{ .compatible = "chipidea,usb2"},
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{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata},
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{ }
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};
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MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
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static int ci_hdrc_usb2_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ci_hdrc_usb2_priv *priv;
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struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
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int ret;
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const struct of_device_id *match;
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if (!ci_pdata) {
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ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
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*ci_pdata = ci_default_pdata; /* struct copy */
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}
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match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
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if (match && match->data) {
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/* struct copy */
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*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
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}
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->clk = devm_clk_get(dev, NULL);
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if (!IS_ERR(priv->clk)) {
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ret = clk_prepare_enable(priv->clk);
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if (ret) {
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dev_err(dev, "failed to enable the clock: %d\n", ret);
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return ret;
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}
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}
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ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
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if (ret)
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goto clk_err;
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ci_pdata->name = dev_name(dev);
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priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
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pdev->num_resources, ci_pdata);
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if (IS_ERR(priv->ci_pdev)) {
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ret = PTR_ERR(priv->ci_pdev);
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if (ret != -EPROBE_DEFER)
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dev_err(dev,
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"failed to register ci_hdrc platform device: %d\n",
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ret);
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goto clk_err;
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}
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platform_set_drvdata(pdev, priv);
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pm_runtime_no_callbacks(dev);
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pm_runtime_enable(dev);
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return 0;
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clk_err:
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if (!IS_ERR(priv->clk))
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clk_disable_unprepare(priv->clk);
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return ret;
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}
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static int ci_hdrc_usb2_remove(struct platform_device *pdev)
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{
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struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
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pm_runtime_disable(&pdev->dev);
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ci_hdrc_remove_device(priv->ci_pdev);
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clk_disable_unprepare(priv->clk);
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return 0;
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}
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static struct platform_driver ci_hdrc_usb2_driver = {
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.probe = ci_hdrc_usb2_probe,
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.remove = ci_hdrc_usb2_remove,
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.driver = {
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.name = "chipidea-usb2",
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.of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
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},
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};
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module_platform_driver(ci_hdrc_usb2_driver);
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MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
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MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
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MODULE_LICENSE("GPL");
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