|
|
@@ -0,0 +1,344 @@
|
|
|
+/*
|
|
|
+ * snps_udc_plat.c - Synopsys UDC Platform Driver
|
|
|
+ *
|
|
|
+ * Copyright (C) 2016 Broadcom
|
|
|
+ *
|
|
|
+ * This program is free software; you can redistribute it and/or
|
|
|
+ * modify it under the terms of the GNU General Public License as
|
|
|
+ * published by the Free Software Foundation version 2.
|
|
|
+ *
|
|
|
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
|
+ * kind, whether express or implied; without even the implied warranty
|
|
|
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
+ * GNU General Public License for more details.
|
|
|
+ */
|
|
|
+
|
|
|
+#include <linux/extcon.h>
|
|
|
+#include <linux/of_address.h>
|
|
|
+#include <linux/of_irq.h>
|
|
|
+#include <linux/of_gpio.h>
|
|
|
+#include <linux/platform_device.h>
|
|
|
+#include <linux/phy/phy.h>
|
|
|
+#include <linux/module.h>
|
|
|
+#include <linux/dmapool.h>
|
|
|
+#include <linux/interrupt.h>
|
|
|
+#include <linux/moduleparam.h>
|
|
|
+#include "amd5536udc.h"
|
|
|
+
|
|
|
+/* description */
|
|
|
+#define UDC_MOD_DESCRIPTION "Synopsys UDC platform driver"
|
|
|
+
|
|
|
+void start_udc(struct udc *udc)
|
|
|
+{
|
|
|
+ if (udc->driver) {
|
|
|
+ dev_info(udc->dev, "Connecting...\n");
|
|
|
+ udc_enable_dev_setup_interrupts(udc);
|
|
|
+ udc_basic_init(udc);
|
|
|
+ udc->connected = 1;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+void stop_udc(struct udc *udc)
|
|
|
+{
|
|
|
+ int tmp;
|
|
|
+ u32 reg;
|
|
|
+
|
|
|
+ spin_lock(&udc->lock);
|
|
|
+
|
|
|
+ /* Flush the receieve fifo */
|
|
|
+ reg = readl(&udc->regs->ctl);
|
|
|
+ reg |= AMD_BIT(UDC_DEVCTL_SRX_FLUSH);
|
|
|
+ writel(reg, &udc->regs->ctl);
|
|
|
+
|
|
|
+ reg = readl(&udc->regs->ctl);
|
|
|
+ reg &= ~(AMD_BIT(UDC_DEVCTL_SRX_FLUSH));
|
|
|
+ writel(reg, &udc->regs->ctl);
|
|
|
+ dev_dbg(udc->dev, "ep rx queue flushed\n");
|
|
|
+
|
|
|
+ /* Mask interrupts. Required more so when the
|
|
|
+ * UDC is connected to a DRD phy.
|
|
|
+ */
|
|
|
+ udc_mask_unused_interrupts(udc);
|
|
|
+
|
|
|
+ /* Disconnect gadget driver */
|
|
|
+ if (udc->driver) {
|
|
|
+ spin_unlock(&udc->lock);
|
|
|
+ udc->driver->disconnect(&udc->gadget);
|
|
|
+ spin_lock(&udc->lock);
|
|
|
+
|
|
|
+ /* empty queues */
|
|
|
+ for (tmp = 0; tmp < UDC_EP_NUM; tmp++)
|
|
|
+ empty_req_queue(&udc->ep[tmp]);
|
|
|
+ }
|
|
|
+ udc->connected = 0;
|
|
|
+
|
|
|
+ spin_unlock(&udc->lock);
|
|
|
+ dev_info(udc->dev, "Device disconnected\n");
|
|
|
+}
|
|
|
+
|
|
|
+void udc_drd_work(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct udc *udc;
|
|
|
+
|
|
|
+ udc = container_of(to_delayed_work(work),
|
|
|
+ struct udc, drd_work);
|
|
|
+
|
|
|
+ if (udc->conn_type) {
|
|
|
+ dev_dbg(udc->dev, "idle -> device\n");
|
|
|
+ start_udc(udc);
|
|
|
+ } else {
|
|
|
+ dev_dbg(udc->dev, "device -> idle\n");
|
|
|
+ stop_udc(udc);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static int usbd_connect_notify(struct notifier_block *self,
|
|
|
+ unsigned long event, void *ptr)
|
|
|
+{
|
|
|
+ struct udc *udc = container_of(self, struct udc, nb);
|
|
|
+
|
|
|
+ dev_dbg(udc->dev, "%s: event: %lu\n", __func__, event);
|
|
|
+
|
|
|
+ udc->conn_type = event;
|
|
|
+
|
|
|
+ schedule_delayed_work(&udc->drd_work, 0);
|
|
|
+
|
|
|
+ return NOTIFY_OK;
|
|
|
+}
|
|
|
+
|
|
|
+static int udc_plat_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct device *dev = &pdev->dev;
|
|
|
+ struct resource *res;
|
|
|
+ struct udc *udc;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ udc = devm_kzalloc(dev, sizeof(*udc), GFP_KERNEL);
|
|
|
+ if (!udc)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ spin_lock_init(&udc->lock);
|
|
|
+ udc->dev = dev;
|
|
|
+
|
|
|
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
+ udc->virt_addr = devm_ioremap_resource(dev, res);
|
|
|
+ if (IS_ERR(udc->regs))
|
|
|
+ return PTR_ERR(udc->regs);
|
|
|
+
|
|
|
+ /* udc csr registers base */
|
|
|
+ udc->csr = udc->virt_addr + UDC_CSR_ADDR;
|
|
|
+
|
|
|
+ /* dev registers base */
|
|
|
+ udc->regs = udc->virt_addr + UDC_DEVCFG_ADDR;
|
|
|
+
|
|
|
+ /* ep registers base */
|
|
|
+ udc->ep_regs = udc->virt_addr + UDC_EPREGS_ADDR;
|
|
|
+
|
|
|
+ /* fifo's base */
|
|
|
+ udc->rxfifo = (u32 __iomem *)(udc->virt_addr + UDC_RXFIFO_ADDR);
|
|
|
+ udc->txfifo = (u32 __iomem *)(udc->virt_addr + UDC_TXFIFO_ADDR);
|
|
|
+
|
|
|
+ udc->phys_addr = (unsigned long)res->start;
|
|
|
+
|
|
|
+ udc->irq = irq_of_parse_and_map(dev->of_node, 0);
|
|
|
+ if (udc->irq <= 0) {
|
|
|
+ dev_err(dev, "Can't parse and map interrupt\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ udc->udc_phy = devm_of_phy_get_by_index(dev, dev->of_node, 0);
|
|
|
+ if (IS_ERR(udc->udc_phy)) {
|
|
|
+ dev_err(dev, "Failed to obtain phy from device tree\n");
|
|
|
+ return PTR_ERR(udc->udc_phy);
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = phy_init(udc->udc_phy);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "UDC phy init failed");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = phy_power_on(udc->udc_phy);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "UDC phy power on failed");
|
|
|
+ phy_exit(udc->udc_phy);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Register for extcon if supported */
|
|
|
+ if (of_get_property(dev->of_node, "extcon", NULL)) {
|
|
|
+ udc->edev = extcon_get_edev_by_phandle(dev, 0);
|
|
|
+ if (IS_ERR(udc->edev)) {
|
|
|
+ if (PTR_ERR(udc->edev) == -EPROBE_DEFER)
|
|
|
+ return -EPROBE_DEFER;
|
|
|
+ dev_err(dev, "Invalid or missing extcon\n");
|
|
|
+ ret = PTR_ERR(udc->edev);
|
|
|
+ goto exit_phy;
|
|
|
+ }
|
|
|
+
|
|
|
+ udc->nb.notifier_call = usbd_connect_notify;
|
|
|
+ ret = extcon_register_notifier(udc->edev, EXTCON_USB,
|
|
|
+ &udc->nb);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(dev, "Can't register extcon device\n");
|
|
|
+ goto exit_phy;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = extcon_get_cable_state_(udc->edev, EXTCON_USB);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(dev, "Can't get cable state\n");
|
|
|
+ goto exit_extcon;
|
|
|
+ } else if (ret) {
|
|
|
+ udc->conn_type = ret;
|
|
|
+ }
|
|
|
+ INIT_DELAYED_WORK(&udc->drd_work, udc_drd_work);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* init dma pools */
|
|
|
+ if (use_dma) {
|
|
|
+ ret = init_dma_pools(udc);
|
|
|
+ if (ret != 0)
|
|
|
+ goto exit_extcon;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = devm_request_irq(dev, udc->irq, udc_irq, IRQF_SHARED,
|
|
|
+ "snps-udc", udc);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(dev, "Request irq %d failed for UDC\n", udc->irq);
|
|
|
+ goto exit_dma;
|
|
|
+ }
|
|
|
+
|
|
|
+ platform_set_drvdata(pdev, udc);
|
|
|
+ udc->chiprev = UDC_BCM_REV;
|
|
|
+
|
|
|
+ if (udc_probe(udc)) {
|
|
|
+ ret = -ENODEV;
|
|
|
+ goto exit_dma;
|
|
|
+ }
|
|
|
+ dev_info(dev, "Synopsys UDC platform driver probe successful\n");
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+exit_dma:
|
|
|
+ if (use_dma)
|
|
|
+ free_dma_pools(udc);
|
|
|
+exit_extcon:
|
|
|
+ if (udc->edev)
|
|
|
+ extcon_unregister_notifier(udc->edev, EXTCON_USB, &udc->nb);
|
|
|
+exit_phy:
|
|
|
+ if (udc->udc_phy) {
|
|
|
+ phy_power_off(udc->udc_phy);
|
|
|
+ phy_exit(udc->udc_phy);
|
|
|
+ }
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int udc_plat_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct udc *dev;
|
|
|
+
|
|
|
+ dev = platform_get_drvdata(pdev);
|
|
|
+
|
|
|
+ usb_del_gadget_udc(&dev->gadget);
|
|
|
+ /* gadget driver must not be registered */
|
|
|
+ if (WARN_ON(dev->driver))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ /* dma pool cleanup */
|
|
|
+ free_dma_pools(dev);
|
|
|
+
|
|
|
+ udc_remove(dev);
|
|
|
+
|
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
|
+
|
|
|
+ if (dev->drd_wq) {
|
|
|
+ flush_workqueue(dev->drd_wq);
|
|
|
+ destroy_workqueue(dev->drd_wq);
|
|
|
+ }
|
|
|
+
|
|
|
+ phy_power_off(dev->udc_phy);
|
|
|
+ phy_exit(dev->udc_phy);
|
|
|
+ extcon_unregister_notifier(dev->edev, EXTCON_USB, &dev->nb);
|
|
|
+
|
|
|
+ dev_info(&pdev->dev, "Synopsys UDC platform driver removed\n");
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+#ifdef CONFIG_PM_SLEEP
|
|
|
+static int udc_plat_suspend(struct device *dev)
|
|
|
+{
|
|
|
+ struct udc *udc;
|
|
|
+
|
|
|
+ udc = dev_get_drvdata(dev);
|
|
|
+ stop_udc(udc);
|
|
|
+
|
|
|
+ if (extcon_get_cable_state_(udc->edev, EXTCON_USB) > 0) {
|
|
|
+ dev_dbg(udc->dev, "device -> idle\n");
|
|
|
+ stop_udc(udc);
|
|
|
+ }
|
|
|
+ phy_power_off(udc->udc_phy);
|
|
|
+ phy_exit(udc->udc_phy);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int udc_plat_resume(struct device *dev)
|
|
|
+{
|
|
|
+ struct udc *udc;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ udc = dev_get_drvdata(dev);
|
|
|
+
|
|
|
+ ret = phy_init(udc->udc_phy);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(udc->dev, "UDC phy init failure");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = phy_power_on(udc->udc_phy);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(udc->dev, "UDC phy power on failure");
|
|
|
+ phy_exit(udc->udc_phy);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (extcon_get_cable_state_(udc->edev, EXTCON_USB) > 0) {
|
|
|
+ dev_dbg(udc->dev, "idle -> device\n");
|
|
|
+ start_udc(udc);
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+static const struct dev_pm_ops udc_plat_pm_ops = {
|
|
|
+ .suspend = udc_plat_suspend,
|
|
|
+ .resume = udc_plat_resume,
|
|
|
+};
|
|
|
+#endif
|
|
|
+
|
|
|
+#if defined(CONFIG_OF)
|
|
|
+static const struct of_device_id of_udc_match[] = {
|
|
|
+ { .compatible = "brcm,ns2-udc", },
|
|
|
+ { .compatible = "brcm,cygnus-udc", },
|
|
|
+ { .compatible = "brcm,iproc-udc", },
|
|
|
+ { }
|
|
|
+};
|
|
|
+MODULE_DEVICE_TABLE(of, of_udc_match);
|
|
|
+#endif
|
|
|
+
|
|
|
+static struct platform_driver udc_plat_driver = {
|
|
|
+ .probe = udc_plat_probe,
|
|
|
+ .remove = udc_plat_remove,
|
|
|
+ .driver = {
|
|
|
+ .name = "snps-udc-plat",
|
|
|
+ .of_match_table = of_match_ptr(of_udc_match),
|
|
|
+#ifdef CONFIG_PM_SLEEP
|
|
|
+ .pm = &udc_plat_pm_ops,
|
|
|
+#endif
|
|
|
+ },
|
|
|
+};
|
|
|
+module_platform_driver(udc_plat_driver);
|
|
|
+
|
|
|
+MODULE_DESCRIPTION(UDC_MOD_DESCRIPTION);
|
|
|
+MODULE_AUTHOR("Broadcom");
|
|
|
+MODULE_LICENSE("GPL v2");
|
Raviteja Garimella