2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6 * (C) Copyright 2002 Hewlett-Packard Company
7 * (C) Copyright 2006 Sylvain Munaut <tnt@246tNt.com>
9 * Bus glue for OHCI HC on the of_platform bus
11 * Modified for of_platform bus from ohci-sa1111.c
13 * This file is licenced under the GPL.
16 #include <linux/signal.h>
17 #include <linux/of_address.h>
18 #include <linux/of_irq.h>
19 #include <linux/of_platform.h>
25 ohci_ppc_of_start(struct usb_hcd *hcd)
27 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
30 if ((ret = ohci_init(ohci)) < 0)
33 if ((ret = ohci_run(ohci)) < 0) {
34 dev_err(hcd->self.controller, "can't start %s\n",
43 static const struct hc_driver ohci_ppc_of_hc_driver = {
44 .description = hcd_name,
45 .product_desc = "OF OHCI",
46 .hcd_priv_size = sizeof(struct ohci_hcd),
49 * generic hardware linkage
52 .flags = HCD_USB11 | HCD_MEMORY,
55 * basic lifecycle operations
57 .start = ohci_ppc_of_start,
59 .shutdown = ohci_shutdown,
62 * managing i/o requests and associated device resources
64 .urb_enqueue = ohci_urb_enqueue,
65 .urb_dequeue = ohci_urb_dequeue,
66 .endpoint_disable = ohci_endpoint_disable,
71 .get_frame_number = ohci_get_frame,
76 .hub_status_data = ohci_hub_status_data,
77 .hub_control = ohci_hub_control,
79 .bus_suspend = ohci_bus_suspend,
80 .bus_resume = ohci_bus_resume,
82 .start_port_reset = ohci_start_port_reset,
86 static int ohci_hcd_ppc_of_probe(struct platform_device *op)
88 struct device_node *dn = op->dev.of_node;
90 struct ohci_hcd *ohci;
96 struct device_node *np;
102 of_device_is_compatible(dn, "ohci-bigendian") ||
103 of_device_is_compatible(dn, "ohci-be");
105 dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
107 rv = of_address_to_resource(dn, 0, &res);
111 hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
115 hcd->rsrc_start = res.start;
116 hcd->rsrc_len = resource_size(&res);
118 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
119 printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
124 irq = irq_of_parse_and_map(dn, 0);
126 printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
131 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
133 printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
138 ohci = hcd_to_ohci(hcd);
140 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
141 if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
142 ohci->flags |= OHCI_QUIRK_FRAME_NO;
143 if (of_device_is_compatible(dn, "mpc5200-ohci"))
144 ohci->flags |= OHCI_QUIRK_FRAME_NO;
149 rv = usb_add_hcd(hcd, irq, 0);
153 /* by now, 440epx is known to show usb_23 erratum */
154 np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx");
156 /* Work around - At this point ohci_run has executed, the
157 * controller is running, everything, the root ports, etc., is
158 * set up. If the ehci driver is loaded, put the ohci core in
159 * the suspended state. The ehci driver will bring it out of
160 * suspended state when / if a non-high speed USB device is
161 * attached to the USB Host port. If the ehci driver is not
162 * loaded, do nothing. request_mem_region is used to test if
163 * the ehci driver is loaded.
166 if (!of_address_to_resource(np, 0, &res)) {
167 if (!request_mem_region(res.start, 0x4, hcd_name)) {
168 writel_be((readl_be(&ohci->regs->control) |
169 OHCI_USB_SUSPEND), &ohci->regs->control);
170 (void) readl_be(&ohci->regs->control);
172 release_mem_region(res.start, 0x4);
174 pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
179 irq_dispose_mapping(irq);
181 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
188 static int ohci_hcd_ppc_of_remove(struct platform_device *op)
190 struct usb_hcd *hcd = platform_get_drvdata(op);
192 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
197 irq_dispose_mapping(hcd->irq);
198 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
205 static const struct of_device_id ohci_hcd_ppc_of_match[] = {
206 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
209 .compatible = "ohci-bigendian",
213 .compatible = "ohci-be",
216 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
219 .compatible = "ohci-littledian",
223 .compatible = "ohci-le",
228 MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
230 #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
231 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
232 #error "No endianness selected for ppc-of-ohci"
236 static struct platform_driver ohci_hcd_ppc_of_driver = {
237 .probe = ohci_hcd_ppc_of_probe,
238 .remove = ohci_hcd_ppc_of_remove,
239 .shutdown = usb_hcd_platform_shutdown,
241 .name = "ppc-of-ohci",
242 .owner = THIS_MODULE,
243 .of_match_table = ohci_hcd_ppc_of_match,