2 * EHCI HCD (Host Controller Driver) for USB.
4 * Copyright (C) 2007 Atheros Communications, Inc.
5 * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
8 * Bus Glue for Atheros AR71xx built-in EHCI controller
12 #include <linux/platform_device.h>
13 #include <linux/delay.h>
15 extern int usb_disabled(void);
17 static void ar71xx_start_ehci(struct platform_device *pdev)
21 static void ar71xx_stop_ehci(struct platform_device *pdev)
28 int usb_ehci_ar71xx_probe(const struct hc_driver *driver,
29 struct usb_hcd **hcd_out,
30 struct platform_device *pdev)
33 struct ehci_hcd *ehci;
38 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
40 dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
46 hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
50 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
52 dev_dbg(&pdev->dev, "no base address specified for %s\n",
57 hcd->rsrc_start = res->start;
58 hcd->rsrc_len = res->end - res->start + 1;
60 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
61 dev_dbg(&pdev->dev, "controller already in use\n");
66 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
68 dev_dbg(&pdev->dev, "error mapping memory\n");
70 goto err_release_region;
73 ar71xx_start_ehci(pdev);
76 ehci = hcd_to_ehci(hcd);
77 ehci->caps = hcd->regs;
78 ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
79 ehci->hcs_params = readl(&ehci->caps->hcs_params);
82 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
89 ar71xx_stop_ehci(pdev);
93 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
99 /* may be called without controller electrically present */
100 /* may be called with controller, bus, and devices active */
103 * usb_ehci_ar71xx_remove - shutdown processing for AR71xx-based HCDs
104 * @dev: USB Host Controller being removed
105 * Context: !in_interrupt()
107 * Reverses the effect of usb_hcd_ar71xx_probe(), first invoking
108 * the HCD's stop() method. It is always called from a thread
109 * context, normally "rmmod", "apmd", or something similar.
112 static void usb_ehci_ar71xx_remove(struct usb_hcd *hcd,
113 struct platform_device *pdev)
116 ar71xx_stop_ehci(pdev);
118 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
122 static const struct hc_driver ehci_ar71xx_hc_driver = {
123 .description = hcd_name,
124 .product_desc = "Atheros AR71xx built-in EHCI controller",
125 .hcd_priv_size = sizeof(struct ehci_hcd),
127 * generic hardware linkage
130 .flags = HCD_MEMORY | HCD_USB2,
133 * basic lifecycle operations
138 .shutdown = ehci_shutdown,
141 * managing i/o requests and associated device resources
143 .urb_enqueue = ehci_urb_enqueue,
144 .urb_dequeue = ehci_urb_dequeue,
145 .endpoint_disable = ehci_endpoint_disable,
150 .get_frame_number = ehci_get_frame,
155 .hub_status_data = ehci_hub_status_data,
156 .hub_control = ehci_hub_control,
158 .hub_suspend = ehci_hub_suspend,
159 .hub_resume = ehci_hub_resume,
163 static int ehci_hcd_ar71xx_drv_probe(struct platform_device *pdev)
165 struct usb_hcd *hcd = NULL;
170 ret = usb_ehci_ar71xx_probe(&ehci_ar71xx_hc_driver, &hcd, pdev);
175 static int ehci_hcd_ar71xx_drv_remove(struct platform_device *pdev)
177 struct usb_hcd *hcd = platform_get_drvdata(pdev);
179 usb_ehci_ar71xx_remove(hcd, pdev);
183 static struct platform_driver ehci_hcd_ar71xx_driver = {
184 .probe = ehci_hcd_ar71xx_drv_probe,
185 .remove = ehci_hcd_ar71xx_drv_remove,
186 .shutdown = usb_hcd_platform_shutdown,
188 .name = "ar71xx-ehci",
189 .bus = &platform_bus_type
193 MODULE_ALIAS("ar71xx-ehci");