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![Peter Chen](/assets/img/avatar_default.png)
Individual controller driver has different requirement for wakeup setting, so move it from core to itself. In order to align with current etting the default wakeup setting is enabled (except for chipidea host). Pass compile test with below commands: make O=outout/all allmodconfig make -j$CPU_NUM O=outout/all drivers/usb Signed-off-by: Peter Chen <peter.chen@freescale.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
223 lines
5.1 KiB
C
223 lines
5.1 KiB
C
/*
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* Driver for EHCI UHP on Atmel chips
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*
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* Copyright (C) 2009 Atmel Corporation,
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* Nicolas Ferre <nicolas.ferre@atmel.com>
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*
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* Based on various ehci-*.c drivers
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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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/io.h>
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#include <linux/kernel.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/platform_device.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include "ehci.h"
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#define DRIVER_DESC "EHCI Atmel driver"
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static const char hcd_name[] = "ehci-atmel";
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static struct hc_driver __read_mostly ehci_atmel_hc_driver;
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/* interface and function clocks */
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static struct clk *iclk, *fclk, *uclk;
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static int clocked;
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/*-------------------------------------------------------------------------*/
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static void atmel_start_clock(void)
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{
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if (IS_ENABLED(CONFIG_COMMON_CLK)) {
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clk_set_rate(uclk, 48000000);
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clk_prepare_enable(uclk);
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}
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clk_prepare_enable(iclk);
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clk_prepare_enable(fclk);
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clocked = 1;
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}
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static void atmel_stop_clock(void)
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{
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clk_disable_unprepare(fclk);
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clk_disable_unprepare(iclk);
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if (IS_ENABLED(CONFIG_COMMON_CLK))
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clk_disable_unprepare(uclk);
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clocked = 0;
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}
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static void atmel_start_ehci(struct platform_device *pdev)
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{
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dev_dbg(&pdev->dev, "start\n");
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atmel_start_clock();
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}
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static void atmel_stop_ehci(struct platform_device *pdev)
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{
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dev_dbg(&pdev->dev, "stop\n");
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atmel_stop_clock();
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}
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/*-------------------------------------------------------------------------*/
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static int ehci_atmel_drv_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd;
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const struct hc_driver *driver = &ehci_atmel_hc_driver;
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struct resource *res;
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struct ehci_hcd *ehci;
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int irq;
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int retval;
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if (usb_disabled())
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return -ENODEV;
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pr_debug("Initializing Atmel-SoC USB Host Controller\n");
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irq = platform_get_irq(pdev, 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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retval = -ENODEV;
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goto fail_create_hcd;
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}
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/* Right now device-tree probed devices don't get dma_mask set.
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* Since shared usb code relies on it, set it here for now.
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* Once we have dma capability bindings this can go away.
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*/
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retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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if (retval)
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goto fail_create_hcd;
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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retval = -ENOMEM;
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goto fail_create_hcd;
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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,
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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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retval = -ENODEV;
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goto fail_request_resource;
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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 = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(hcd->regs)) {
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retval = PTR_ERR(hcd->regs);
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goto fail_request_resource;
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}
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iclk = devm_clk_get(&pdev->dev, "ehci_clk");
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if (IS_ERR(iclk)) {
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dev_err(&pdev->dev, "Error getting interface clock\n");
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retval = -ENOENT;
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goto fail_request_resource;
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}
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fclk = devm_clk_get(&pdev->dev, "uhpck");
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if (IS_ERR(fclk)) {
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dev_err(&pdev->dev, "Error getting function clock\n");
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retval = -ENOENT;
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goto fail_request_resource;
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}
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if (IS_ENABLED(CONFIG_COMMON_CLK)) {
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uclk = devm_clk_get(&pdev->dev, "usb_clk");
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if (IS_ERR(uclk)) {
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dev_err(&pdev->dev, "failed to get uclk\n");
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retval = PTR_ERR(uclk);
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goto fail_request_resource;
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}
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}
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ehci = hcd_to_ehci(hcd);
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/* registers start at offset 0x0 */
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ehci->caps = hcd->regs;
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atmel_start_ehci(pdev);
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retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (retval)
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goto fail_add_hcd;
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device_wakeup_enable(hcd->self.controller);
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return retval;
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fail_add_hcd:
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atmel_stop_ehci(pdev);
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fail_request_resource:
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usb_put_hcd(hcd);
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fail_create_hcd:
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dev_err(&pdev->dev, "init %s fail, %d\n",
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dev_name(&pdev->dev), retval);
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return retval;
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}
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static int ehci_atmel_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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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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atmel_stop_ehci(pdev);
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fclk = iclk = NULL;
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id atmel_ehci_dt_ids[] = {
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{ .compatible = "atmel,at91sam9g45-ehci" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, atmel_ehci_dt_ids);
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#endif
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static struct platform_driver ehci_atmel_driver = {
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.probe = ehci_atmel_drv_probe,
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.remove = ehci_atmel_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "atmel-ehci",
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.of_match_table = of_match_ptr(atmel_ehci_dt_ids),
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},
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};
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static int __init ehci_atmel_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 "\n", hcd_name);
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ehci_init_driver(&ehci_atmel_hc_driver, NULL);
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return platform_driver_register(&ehci_atmel_driver);
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}
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module_init(ehci_atmel_init);
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static void __exit ehci_atmel_cleanup(void)
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{
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platform_driver_unregister(&ehci_atmel_driver);
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}
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module_exit(ehci_atmel_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_ALIAS("platform:atmel-ehci");
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MODULE_AUTHOR("Nicolas Ferre");
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MODULE_LICENSE("GPL");
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