1 // SPDX-License-Identifier: GPL-1.0+
3 * OHCI HCD (Host Controller Driver) for USB.
5 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
6 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
7 * (C) Copyright 2002 Hewlett-Packard Company
8 * (C) Copyright 2006 Sylvain Munaut <tnt@246tNt.com>
10 * Bus glue for OHCI HC on the of_platform bus
12 * Modified for of_platform bus from ohci-sa1111.c
14 * This file is licenced under the GPL.
17 #include <linux/signal.h>
19 #include <linux/of_address.h>
20 #include <linux/of_irq.h>
21 #include <linux/platform_device.h>
24 ohci_ppc_of_start(struct usb_hcd *hcd)
26 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
29 if ((ret = ohci_init(ohci)) < 0)
32 if ((ret = ohci_run(ohci)) < 0) {
33 dev_err(hcd->self.controller, "can't start %s\n",
42 static const struct hc_driver ohci_ppc_of_hc_driver = {
43 .description = hcd_name,
44 .product_desc = "OF OHCI",
45 .hcd_priv_size = sizeof(struct ohci_hcd),
48 * generic hardware linkage
51 .flags = HCD_USB11 | HCD_DMA | HCD_MEMORY,
54 * basic lifecycle operations
56 .start = ohci_ppc_of_start,
58 .shutdown = ohci_shutdown,
61 * managing i/o requests and associated device resources
63 .urb_enqueue = ohci_urb_enqueue,
64 .urb_dequeue = ohci_urb_dequeue,
65 .endpoint_disable = ohci_endpoint_disable,
70 .get_frame_number = ohci_get_frame,
75 .hub_status_data = ohci_hub_status_data,
76 .hub_control = ohci_hub_control,
78 .bus_suspend = ohci_bus_suspend,
79 .bus_resume = ohci_bus_resume,
81 .start_port_reset = ohci_start_port_reset,
85 static int ohci_hcd_ppc_of_probe(struct platform_device *op)
87 struct device_node *dn = op->dev.of_node;
89 struct ohci_hcd *ohci;
95 struct device_node *np;
101 of_device_is_compatible(dn, "ohci-bigendian") ||
102 of_device_is_compatible(dn, "ohci-be");
104 dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
106 rv = of_address_to_resource(dn, 0, &res);
110 hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
114 hcd->rsrc_start = res.start;
115 hcd->rsrc_len = resource_size(&res);
117 hcd->regs = devm_ioremap_resource(&op->dev, &res);
118 if (IS_ERR(hcd->regs)) {
119 rv = PTR_ERR(hcd->regs);
123 irq = irq_of_parse_and_map(dn, 0);
125 dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n",
131 ohci = hcd_to_ohci(hcd);
133 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
134 if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
135 ohci->flags |= OHCI_QUIRK_FRAME_NO;
136 if (of_device_is_compatible(dn, "mpc5200-ohci"))
137 ohci->flags |= OHCI_QUIRK_FRAME_NO;
142 rv = usb_add_hcd(hcd, irq, 0);
144 device_wakeup_enable(hcd->self.controller);
148 /* by now, 440epx is known to show usb_23 erratum */
149 np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx");
151 /* Work around - At this point ohci_run has executed, the
152 * controller is running, everything, the root ports, etc., is
153 * set up. If the ehci driver is loaded, put the ohci core in
154 * the suspended state. The ehci driver will bring it out of
155 * suspended state when / if a non-high speed USB device is
156 * attached to the USB Host port. If the ehci driver is not
157 * loaded, do nothing. request_mem_region is used to test if
158 * the ehci driver is loaded.
161 if (!of_address_to_resource(np, 0, &res)) {
162 if (!request_mem_region(res.start, 0x4, hcd_name)) {
163 writel_be((readl_be(&ohci->regs->control) |
164 OHCI_USB_SUSPEND), &ohci->regs->control);
165 (void) readl_be(&ohci->regs->control);
167 release_mem_region(res.start, 0x4);
169 pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
173 irq_dispose_mapping(irq);
180 static void ohci_hcd_ppc_of_remove(struct platform_device *op)
182 struct usb_hcd *hcd = platform_get_drvdata(op);
184 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
188 irq_dispose_mapping(hcd->irq);
193 static const struct of_device_id ohci_hcd_ppc_of_match[] = {
194 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
197 .compatible = "ohci-bigendian",
201 .compatible = "ohci-be",
204 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
207 .compatible = "ohci-littledian",
211 .compatible = "ohci-le",
216 MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
218 #if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
219 !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
220 #error "No endianness selected for ppc-of-ohci"
224 static struct platform_driver ohci_hcd_ppc_of_driver = {
225 .probe = ohci_hcd_ppc_of_probe,
226 .remove_new = ohci_hcd_ppc_of_remove,
227 .shutdown = usb_hcd_platform_shutdown,
229 .name = "ppc-of-ohci",
230 .of_match_table = ohci_hcd_ppc_of_match,