2 * Bus Glue for Atheros AR7XXX/AR9XXX built-in EHCI controller.
4 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Parts of this file are based on Atheros' 2.6.15 BSP
8 * Copyright (C) 2007 Atheros Communications, Inc.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
15 #include <linux/platform_device.h>
22 static const struct platform_device_id ehci_ath79_id_table[] = {
24 .name = "ar71xx-ehci",
25 .driver_data = EHCI_ATH79_IP_V1,
28 .name = "ar724x-ehci",
29 .driver_data = EHCI_ATH79_IP_V2,
32 .name = "ar913x-ehci",
33 .driver_data = EHCI_ATH79_IP_V2,
36 /* terminating entry */
40 MODULE_DEVICE_TABLE(platform, ehci_ath79_id_table);
42 static int ehci_ath79_init(struct usb_hcd *hcd)
44 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
45 struct platform_device *pdev = to_platform_device(hcd->self.controller);
46 const struct platform_device_id *id;
50 id = platform_get_device_id(pdev);
52 dev_err(hcd->self.controller, "missing device id\n");
56 hclength = HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
57 switch (id->driver_data) {
58 case EHCI_ATH79_IP_V1:
59 ehci->has_synopsys_hc_bug = 1;
61 ehci->caps = hcd->regs;
62 ehci->regs = hcd->regs + hclength;
65 case EHCI_ATH79_IP_V2:
68 ehci->caps = hcd->regs + 0x100;
69 ehci->regs = hcd->regs + 0x100 + hclength;
76 dbg_hcs_params(ehci, "reset");
77 dbg_hcc_params(ehci, "reset");
78 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
87 ehci_port_power(ehci, 0);
92 static const struct hc_driver ehci_ath79_hc_driver = {
93 .description = hcd_name,
94 .product_desc = "Atheros built-in EHCI controller",
95 .hcd_priv_size = sizeof(struct ehci_hcd),
97 .flags = HCD_MEMORY | HCD_USB2,
99 .reset = ehci_ath79_init,
102 .shutdown = ehci_shutdown,
104 .urb_enqueue = ehci_urb_enqueue,
105 .urb_dequeue = ehci_urb_dequeue,
106 .endpoint_disable = ehci_endpoint_disable,
107 .endpoint_reset = ehci_endpoint_reset,
109 .get_frame_number = ehci_get_frame,
111 .hub_status_data = ehci_hub_status_data,
112 .hub_control = ehci_hub_control,
114 .relinquish_port = ehci_relinquish_port,
115 .port_handed_over = ehci_port_handed_over,
117 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
120 static int ehci_ath79_probe(struct platform_device *pdev)
123 struct resource *res;
130 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
132 dev_dbg(&pdev->dev, "no IRQ specified\n");
137 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
139 dev_dbg(&pdev->dev, "no base address specified\n");
143 hcd = usb_create_hcd(&ehci_ath79_hc_driver, &pdev->dev,
144 dev_name(&pdev->dev));
148 hcd->rsrc_start = res->start;
149 hcd->rsrc_len = res->end - res->start + 1;
151 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
152 dev_dbg(&pdev->dev, "controller already in use\n");
157 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
159 dev_dbg(&pdev->dev, "error mapping memory\n");
161 goto err_release_region;
164 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
174 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
180 static int ehci_ath79_remove(struct platform_device *pdev)
182 struct usb_hcd *hcd = platform_get_drvdata(pdev);
186 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
192 static struct platform_driver ehci_ath79_driver = {
193 .probe = ehci_ath79_probe,
194 .remove = ehci_ath79_remove,
195 .id_table = ehci_ath79_id_table,
197 .owner = THIS_MODULE,
198 .name = "ath79-ehci",
202 MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ehci");