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
,