mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 04:00:52 +07:00
410 lines
9.3 KiB
C
410 lines
9.3 KiB
C
// SPDX-License-Identifier: GPL-1.0+
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/*
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* ehic-rtk.c RTK EHCI HCD (Host Controller Driver)
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*
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* Copyright (C) 2017 Realtek Semiconductor Corporation
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mbus.h>
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#include <linux/clk.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/of_address.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/usb/phy.h>
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#include <linux/of_gpio.h>
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#include <linux/suspend.h>
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#include <soc/realtek/rtk-usb-manager.h>
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#include "ehci.h"
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#define DRIVER_DESC "EHCI realtek driver"
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static const char hcd_name[] = "ehci-rtk";
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static struct hc_driver __read_mostly ehci_rtk_hc_driver;
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static struct ehci_rtk {
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struct device *dev;
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struct usb_phy *phy;
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struct ehci_hcd *ehci;
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int irq;
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struct work_struct work;
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};
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#ifdef CONFIG_USB_PATCH_ON_RTK
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#ifdef CONFIG_RTK_USB_RLE0599_PHY
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extern void rtk_rle0599_phy_toggle(struct usb_phy *usb2_phy, bool isConnect);
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#endif
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int RTK_ehci_usb2_phy_toggle(struct device *hcd_dev, bool isConnect)
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{
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struct usb_phy *phy = NULL;
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if (hcd_dev == NULL)
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return -ENODEV;
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phy = devm_usb_get_phy_by_phandle(hcd_dev, "usb-phy", 0);
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if (IS_ERR(phy)) {
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dev_err(hcd_dev, "No usb phy found\n");
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return -ENODEV;
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}
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dev_dbg(hcd_dev, "%s\n", __func__);
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#ifdef CONFIG_RTK_USB_RLE0599_PHY
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if (phy != NULL)
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rtk_rle0599_phy_toggle(phy, isConnect);
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#endif
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return 0;
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}
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#endif // CONFIG_USB_PATCH_ON_RTK
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static void ehci_rtk_probe_work(struct work_struct *work)
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{
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struct ehci_rtk *rtk = container_of(work, struct ehci_rtk, work);
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struct device *dev = rtk->dev;
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struct usb_hcd *hcd = ehci_to_hcd(rtk->ehci);
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struct usb_phy *phy = rtk->phy;
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int irq = rtk->irq;
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int ret = 0;
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unsigned long probe_time = jiffies;
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dev_info(dev, "%s Start ...\n", __func__);
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usb_phy_init(phy);
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ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (ret) {
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dev_err(dev, "%s: error add hcd\n", __func__);
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usb_put_hcd(hcd);
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}
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rtk_usb_init_port_power_on(dev);
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dev_info(dev, "%s End ... ok! (take %d ms)\n", __func__,
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jiffies_to_msecs(jiffies - probe_time));
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}
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static int ehci_rtk_drv_probe(struct platform_device *pdev)
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{
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struct resource res;
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci;
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void __iomem *regs;
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int irq, err = 0;
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struct usb_phy *phy;
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unsigned long probe_time = jiffies;
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if (usb_disabled())
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return -ENODEV;
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dev_info(&pdev->dev, "Probe Realtek-SoC USB EHCI Host Controller\n");
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//phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
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phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
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if (IS_ERR(phy)) {
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dev_err(&pdev->dev, "No usb phy found\n");
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return -ENODEV;
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}
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irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
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if (irq <= 0) {
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dev_err(&pdev->dev,
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"Found HC with no IRQ. Check %s setup!\n",
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dev_name(&pdev->dev));
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err = -ENODEV;
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goto err1;
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}
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if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
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dev_err(&pdev->dev,
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"Found HC with no register addr. Check %s setup!\n",
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dev_name(&pdev->dev));
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err = -ENODEV;
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goto err1;
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}
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/*
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* Right now device-tree probed devices don't get dma_mask
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* set. Since shared usb code relies on it, set it here for
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* now. Once we have dma capability bindings this can go away.
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*/
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if (!pdev->dev.dma_mask)
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pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
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if (!pdev->dev.coherent_dma_mask)
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pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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regs = of_iomap(pdev->dev.of_node, 0);
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if (regs == NULL) {
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dev_err(&pdev->dev, "error mapping memory\n");
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err = -EFAULT;
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goto err3;
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}
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if (readl(regs) == 0xdeadbeef) {
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dev_err(&pdev->dev, "%s error read ehci registers\n", __func__);
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err = -ENODEV;
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goto err3;
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}
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hcd = usb_create_hcd(&ehci_rtk_hc_driver,
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&pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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err = -ENOMEM;
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goto err3;
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}
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hcd->rsrc_start = res.start;
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hcd->rsrc_len = resource_size(&res);
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hcd->regs = regs;
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ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs;
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#ifdef CONFIG_USB_PATCH_ON_RTK
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if (of_property_read_bool(pdev->dev.of_node,
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"fixed_async_list_addr_bug")) {
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dev_info(&pdev->dev, "%s Enable fixed_async_list_addr_bug\n",
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__func__);
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ehci->fixed_async_list_addr_bug = 1;
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}
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#endif // CONFIG_USB_PATCH_ON_RTK
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if (of_property_read_bool(pdev->dev.of_node, "delay_probe_work")) {
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struct ehci_rtk *rtk;
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rtk = devm_kzalloc(&pdev->dev, sizeof(*rtk), GFP_KERNEL);
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if (!rtk) {
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err = -ENOMEM;
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goto err4;
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}
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rtk->dev = &pdev->dev;
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rtk->ehci = ehci;
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rtk->irq = irq;
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rtk->phy = phy;
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INIT_WORK(&rtk->work, ehci_rtk_probe_work);
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if (of_property_read_bool(pdev->dev.of_node, "ordered_probe"))
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rtk_usb_manager_schedule_work(&pdev->dev, &rtk->work);
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else
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schedule_work(&rtk->work);
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} else {
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usb_phy_init(phy);
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err = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (err) {
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dev_err(&pdev->dev, "error add hcd\n");
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goto err4;
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}
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}
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dev_info(&pdev->dev, "%s OK (take %d ms)\n", __func__,
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jiffies_to_msecs(jiffies - probe_time));
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return 0;
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err4:
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usb_put_hcd(hcd);
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err3:
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irq_dispose_mapping(irq);
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err1:
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dev_err(&pdev->dev, "%s: Probe %s fail, %d\n", __func__,
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dev_name(&pdev->dev), err);
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return err;
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}
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static int ehci_rtk_drv_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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dev_set_drvdata(&pdev->dev, NULL);
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usb_remove_hcd(hcd);
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irq_dispose_mapping(hcd->irq);
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usb_put_hcd(hcd);
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return 0;
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}
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#ifdef CONFIG_USB_PATCH_ON_RTK
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/* Add Workaround to fixed EHCI/OHCI Wrapper can't work simultaneously */
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bool RTK_ehci_check_schedule_actived(const char *func)
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{
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static struct ehci_hcd *ehci;
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struct device_node *node = NULL;
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struct platform_device *pdev = NULL;
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struct usb_hcd *hcd = NULL;
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bool connected = false;
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u32 status;
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if (ehci == NULL) {
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node = of_find_compatible_node(NULL, NULL,
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"realtek,rtd129x-ehci");
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if (node != NULL)
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pdev = of_find_device_by_node(node);
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if (pdev != NULL) {
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hcd = platform_get_drvdata(pdev);
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ehci = hcd_to_ehci(hcd);
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}
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}
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if (ehci == NULL) {
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pr_debug("%s NO EHCI\n", __func__);
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return false;
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}
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status = ehci_readl(ehci, &ehci->regs->status);
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if (status & (STS_PSS | STS_ASS))
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connected = true;
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return connected;
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}
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#endif // CONFIG_USB_PATCH_ON_RTK
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#ifdef CONFIG_SUSPEND
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#ifdef CONFIG_USB_PATCH_ON_RTK
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static int rtk_ehci_suspend(struct device *dev);
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int RTK_rtk_ehci_suspend(struct device *dev)
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{
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return rtk_ehci_suspend(dev);
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}
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#endif // CONFIG_USB_PATCH_ON_RTK
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static int rtk_ehci_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct platform_device *pdev = to_platform_device(dev);
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struct usb_phy *phy;
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bool do_wakeup = device_may_wakeup(dev);
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int rc = 0;
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dev_info(dev, "[USB] Enter %s", __func__);
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#ifdef CONFIG_USB_PATCH_ON_RTK
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#ifdef CONFIG_RTK_PLATFORM
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if (RTK_PM_STATE == PM_SUSPEND_STANDBY) {
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//For idle mode
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dev_info(dev, "[USB] %s Idle mode\n", __func__);
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goto out;
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}
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dev_info(dev, "[USB] %s Suspend mode\n", __func__);
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#endif
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#endif // CONFIG_USB_PATCH_ON_RTK
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rc = ehci_suspend(hcd, do_wakeup);
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phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
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if (IS_ERR(phy)) {
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dev_err(&pdev->dev, "No usb phy found\n");
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return -ENODEV;
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}
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usb_phy_shutdown(phy);
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out:
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dev_info(dev, "[USB] Exit %s", __func__);
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return rc;
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}
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#ifdef CONFIG_USB_PATCH_ON_RTK
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static int rtk_ehci_resume(struct device *dev);
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int RTK_rtk_ehci_resume(struct device *dev)
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{
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return rtk_ehci_resume(dev);
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}
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#endif // CONFIG_USB_PATCH_ON_RTK
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static int rtk_ehci_resume(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct platform_device *pdev = to_platform_device(dev);
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struct usb_phy *phy;
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dev_info(dev, "[USB] Enter %s", __func__);
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#ifdef CONFIG_USB_PATCH_ON_RTK
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#ifdef CONFIG_RTK_PLATFORM
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if (RTK_PM_STATE == PM_SUSPEND_STANDBY) {
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//For idle mode
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dev_info(dev, "[USB] %s Idle mode\n", __func__);
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goto out;
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}
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dev_info(dev, "[USB] %s Suspend mode\n", __func__);
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#endif
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#endif // CONFIG_USB_PATCH_ON_RTK
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phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
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if (IS_ERR(phy)) {
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dev_err(&pdev->dev, "No usb phy found\n");
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return -ENODEV;
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}
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usb_phy_init(phy);
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ehci_resume(hcd, false);
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out:
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dev_info(dev, "[USB] Exit %s", __func__);
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return 0;
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}
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#else
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#define rtk_ehci_suspend NULL
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#define rtk_ehci_resume NULL
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#endif
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static const struct dev_pm_ops rtk_ehci_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(rtk_ehci_suspend, rtk_ehci_resume)
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//SET_LATE_SYSTEM_SLEEP_PM_OPS(rtk_ehci_suspend, rtk_ehci_resume)
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};
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static const struct of_device_id ehci_rtk_dt_ids[] = {
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{ .compatible = "realtek,rtk119x-ehci", },
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{ .compatible = "realtek,rtd129x-ehci", },
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{},
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};
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MODULE_DEVICE_TABLE(of, ehci_rtk_dt_ids);
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static struct platform_driver ehci_rtk_driver = {
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.probe = ehci_rtk_drv_probe,
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.remove = ehci_rtk_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "rtk-ehci",
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.owner = THIS_MODULE,
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.pm = &rtk_ehci_pm_ops,
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.of_match_table = of_match_ptr(ehci_rtk_dt_ids),
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},
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};
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static int __init ehci_rtk_init(void)
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{
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if (usb_disabled())
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return -ENODEV;
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pr_info("%s: " DRIVER_DESC " init\n", hcd_name);
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ehci_init_driver(&ehci_rtk_hc_driver, NULL);
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return platform_driver_register(&ehci_rtk_driver);
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}
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module_init(ehci_rtk_init);
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//late_initcall_sync(ehci_rtk_init);
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static void __exit ehci_rtk_cleanup(void)
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{
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platform_driver_unregister(&ehci_rtk_driver);
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}
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module_exit(ehci_rtk_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_ALIAS("platform:rtk-ehci");
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MODULE_LICENSE("GPL");
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