| /* |
| * Copyright (C) 2010 Broadcom Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| #include <linux/usb.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/usb/hcd.h> |
| |
| /*********************************************************************** |
| * Library functions |
| ***********************************************************************/ |
| |
| int brcm_usb_probe(struct platform_device *pdev, |
| const struct hc_driver *hc_driver, |
| struct usb_hcd **hcdptr, |
| struct clk **hcd_clk_ptr) |
| { |
| struct resource *res_mem; |
| int irq; |
| struct usb_hcd *hcd; |
| struct device_node *dn = pdev->dev.of_node; |
| struct clk *usb_clk; |
| int err; |
| |
| if (usb_disabled()) |
| return -ENODEV; |
| |
| res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res_mem) { |
| dev_err(&pdev->dev, "platform_get_resource error.\n"); |
| return -ENODEV; |
| } |
| |
| irq = platform_get_irq(pdev, 0); |
| if (irq < 0) { |
| dev_err(&pdev->dev, "platform_get_irq error.\n"); |
| return -ENODEV; |
| } |
| |
| usb_clk = of_clk_get_by_name(dn, "sw_usb"); |
| if (IS_ERR(usb_clk)) { |
| dev_err(&pdev->dev, "Clock not found in Device Tree\n"); |
| usb_clk = NULL; |
| } |
| err = clk_prepare_enable(usb_clk); |
| if (err) |
| return err; |
| *hcd_clk_ptr = usb_clk; |
| |
| /* initialize hcd */ |
| hcd = usb_create_hcd(hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
| if (!hcd) { |
| dev_err(&pdev->dev, "Failed to create hcd\n"); |
| clk_disable(usb_clk); |
| return -ENOMEM; |
| } |
| *hcdptr = hcd; |
| hcd->rsrc_start = res_mem->start; |
| hcd->rsrc_len = resource_size(res_mem); |
| |
| hcd->regs = devm_ioremap_resource(&pdev->dev, res_mem); |
| if (IS_ERR(hcd->regs)) { |
| err = PTR_ERR(hcd->regs); |
| goto err_put_hcd; |
| } |
| err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
| if (err) |
| goto err_put_hcd; |
| |
| device_wakeup_enable(hcd->self.controller); |
| platform_set_drvdata(pdev, hcd); |
| return err; |
| |
| err_put_hcd: |
| clk_disable(usb_clk); |
| usb_put_hcd(hcd); |
| |
| return err; |
| } |
| EXPORT_SYMBOL(brcm_usb_probe); |
| |
| int brcm_usb_remove(struct platform_device *pdev, struct clk *hcd_clk) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| usb_remove_hcd(hcd); |
| usb_put_hcd(hcd); |
| clk_disable(hcd_clk); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(brcm_usb_remove); |