[mirror_ubuntu-artful-kernel.git] / drivers / usb / host / ohci-ppc-of.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * (C) Copyright 2002 Hewlett-Packard Company
 * (C) Copyright 2006 Sylvain Munaut <tnt@246tNt.com>
 *
 * Bus glue for OHCI HC on the of_platform bus
 *
 * Modified for of_platform bus from ohci-sa1111.c
 *
 * This file is licenced under the GPL.
 */

#include <linux/signal.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>

#include <asm/prom.h>


static int
ohci_ppc_of_start(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
	int		ret;

	if ((ret = ohci_init(ohci)) < 0)
		return ret;

	if ((ret = ohci_run(ohci)) < 0) {
		dev_err(hcd->self.controller, "can't start %s\n",
			hcd->self.bus_name);
		ohci_stop(hcd);
		return ret;
	}

	return 0;
}

static const struct hc_driver ohci_ppc_of_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"OF OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq =			ohci_irq,
	.flags =		HCD_USB11 | HCD_MEMORY,

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_ppc_of_start,
	.stop =			ohci_stop,
	.shutdown = 		ohci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number =	ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	ohci_hub_status_data,
	.hub_control =		ohci_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};


static int ohci_hcd_ppc_of_probe(struct platform_device *op)
{
	struct device_node *dn = op->dev.of_node;
	struct usb_hcd *hcd;
	struct ohci_hcd	*ohci;
	struct resource res;
	int irq;

	int rv;
	int is_bigendian;
	struct device_node *np;

	if (usb_disabled())
		return -ENODEV;

	is_bigendian =
		of_device_is_compatible(dn, "ohci-bigendian") ||
		of_device_is_compatible(dn, "ohci-be");

	dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");

	rv = of_address_to_resource(dn, 0, &res);
	if (rv)
		return rv;

	hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
	if (!hcd)
		return -ENOMEM;

	hcd->rsrc_start = res.start;
	hcd->rsrc_len = resource_size(&res);

	hcd->regs = devm_ioremap_resource(&op->dev, &res);
	if (IS_ERR(hcd->regs)) {
		rv = PTR_ERR(hcd->regs);
		goto err_rmr;
	}

	irq = irq_of_parse_and_map(dn, 0);
	if (irq == NO_IRQ) {
		dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n",
			__FILE__);
		rv = -EBUSY;
		goto err_rmr;
	}

	ohci = hcd_to_ohci(hcd);
	if (is_bigendian) {
		ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
		if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
			ohci->flags |= OHCI_QUIRK_FRAME_NO;
		if (of_device_is_compatible(dn, "mpc5200-ohci"))
			ohci->flags |= OHCI_QUIRK_FRAME_NO;
	}

	ohci_hcd_init(ohci);

	rv = usb_add_hcd(hcd, irq, 0);
	if (rv == 0) {
		device_wakeup_enable(hcd->self.controller);
		return 0;
	}

	/* by now, 440epx is known to show usb_23 erratum */
	np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx");

	/* Work around - At this point ohci_run has executed, the
	* controller is running, everything, the root ports, etc., is
	* set up.  If the ehci driver is loaded, put the ohci core in
	* the suspended state.  The ehci driver will bring it out of
	* suspended state when / if a non-high speed USB device is
	* attached to the USB Host port.  If the ehci driver is not
	* loaded, do nothing. request_mem_region is used to test if
	* the ehci driver is loaded.
	*/
	if (np !=  NULL) {
		if (!of_address_to_resource(np, 0, &res)) {
			if (!request_mem_region(res.start, 0x4, hcd_name)) {
				writel_be((readl_be(&ohci->regs->control) |
					OHCI_USB_SUSPEND), &ohci->regs->control);
					(void) readl_be(&ohci->regs->control);
			} else
				release_mem_region(res.start, 0x4);
		} else
			pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
	}

	irq_dispose_mapping(irq);
err_rmr:
 	usb_put_hcd(hcd);

	return rv;
}

static int ohci_hcd_ppc_of_remove(struct platform_device *op)
{
	struct usb_hcd *hcd = platform_get_drvdata(op);

	dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");

	usb_remove_hcd(hcd);

	irq_dispose_mapping(hcd->irq);

	usb_put_hcd(hcd);

	return 0;
}

static const struct of_device_id ohci_hcd_ppc_of_match[] = {
#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
	{
		.name = "usb",
		.compatible = "ohci-bigendian",
	},
	{
		.name = "usb",
		.compatible = "ohci-be",
	},
#endif
#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
	{
		.name = "usb",
		.compatible = "ohci-littledian",
	},
	{
		.name = "usb",
		.compatible = "ohci-le",
	},
#endif
	{},
};
MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);

#if	!defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
	!defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
#error "No endianness selected for ppc-of-ohci"
#endif


static struct platform_driver ohci_hcd_ppc_of_driver = {
	.probe		= ohci_hcd_ppc_of_probe,
	.remove		= ohci_hcd_ppc_of_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver = {
		.name = "ppc-of-ohci",
		.of_match_table = ohci_hcd_ppc_of_match,
	},
};
Commit	Line	Data
495a678f SM	1	/*
	2	* OHCI HCD (Host Controller Driver) for USB.
	3	*
	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>
	8	*
	9	* Bus glue for OHCI HC on the of_platform bus
	10	*
	11	* Modified for of_platform bus from ohci-sa1111.c
	12	*
	13	* This file is licenced under the GPL.
	14	*/
	15
	16	#include <linux/signal.h>
5af50730 RH	17	#include <linux/of_address.h>
5af50730 RH	18	#include <linux/of_irq.h>
554cc171	19	#include <linux/of_platform.h>
495a678f	20
495a678f SM	21	#include <asm/prom.h>
	22
	23
41ac7b3a	24	static int
495a678f SM	25	ohci_ppc_of_start(struct usb_hcd *hcd)
	26	{
	27	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	28	int ret;
	29
	30	if ((ret = ohci_init(ohci)) < 0)
	31	return ret;
	32
	33	if ((ret = ohci_run(ohci)) < 0) {
1d55b768 GKH	34	dev_err(hcd->self.controller, "can't start %s\n",
1d55b768 GKH	35	hcd->self.bus_name);
495a678f SM	36	ohci_stop(hcd);
	37	return ret;
	38	}
	39
	40	return 0;
	41	}
	42
	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),
	47
	48	/*
	49	* generic hardware linkage
	50	*/
	51	.irq = ohci_irq,
	52	.flags = HCD_USB11 \| HCD_MEMORY,
	53
	54	/*
	55	* basic lifecycle operations
	56	*/
	57	.start = ohci_ppc_of_start,
	58	.stop = ohci_stop,
	59	.shutdown = ohci_shutdown,
	60
	61	/*
	62	* managing i/o requests and associated device resources
	63	*/
	64	.urb_enqueue = ohci_urb_enqueue,
	65	.urb_dequeue = ohci_urb_dequeue,
	66	.endpoint_disable = ohci_endpoint_disable,
	67
	68	/*
	69	* scheduling support
	70	*/
	71	.get_frame_number = ohci_get_frame,
	72
	73	/*
	74	* root hub support
	75	*/
	76	.hub_status_data = ohci_hub_status_data,
	77	.hub_control = ohci_hub_control,
495a678f SM	78	#ifdef CONFIG_PM
	79	.bus_suspend = ohci_bus_suspend,
	80	.bus_resume = ohci_bus_resume,
	81	#endif
	82	.start_port_reset = ohci_start_port_reset,
	83	};
	84
	85
41ac7b3a	86	static int ohci_hcd_ppc_of_probe(struct platform_device *op)
495a678f	87	{
61c7a080	88	struct device_node *dn = op->dev.of_node;
495a678f SM	89	struct usb_hcd *hcd;
	90	struct ohci_hcd *ohci;
	91	struct resource res;
	92	int irq;
	93
	94	int rv;
	95	int is_bigendian;
796bcae7	96	struct device_node *np;
495a678f SM	97
	98	if (usb_disabled())
	99	return -ENODEV;
	100
	101	is_bigendian =
55b61fec SR	102	of_device_is_compatible(dn, "ohci-bigendian") \|\|
55b61fec SR	103	of_device_is_compatible(dn, "ohci-be");
495a678f SM	104
	105	dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
	106
	107	rv = of_address_to_resource(dn, 0, &res);
	108	if (rv)
	109	return rv;
	110
	111	hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
	112	if (!hcd)
	113	return -ENOMEM;
	114
	115	hcd->rsrc_start = res.start;
28f65c11	116	hcd->rsrc_len = resource_size(&res);
495a678f	117
3e2e714e JH	118	hcd->regs = devm_ioremap_resource(&op->dev, &res);
	119	if (IS_ERR(hcd->regs)) {
	120	rv = PTR_ERR(hcd->regs);
495a678f SM	121	goto err_rmr;
	122	}
	123
	124	irq = irq_of_parse_and_map(dn, 0);
	125	if (irq == NO_IRQ) {
63c9b9d3 JH	126	dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n",
63c9b9d3 JH	127	__FILE__);
495a678f	128	rv = -EBUSY;
3e2e714e	129	goto err_rmr;
495a678f SM	130	}
	131
	132	ohci = hcd_to_ohci(hcd);
4f45426c	133	if (is_bigendian) {
495a678f	134	ohci->flags \|= OHCI_QUIRK_BE_MMIO \| OHCI_QUIRK_BE_DESC;
66ffbe49 GL	135	if (of_device_is_compatible(dn, "fsl,mpc5200-ohci"))
66ffbe49 GL	136	ohci->flags \|= OHCI_QUIRK_FRAME_NO;
4f45426c VB	137	if (of_device_is_compatible(dn, "mpc5200-ohci"))
	138	ohci->flags \|= OHCI_QUIRK_FRAME_NO;
	139	}
495a678f SM	140
	141	ohci_hcd_init(ohci);
	142
b5dd18d8	143	rv = usb_add_hcd(hcd, irq, 0);
3c9740a1 PC	144	if (rv == 0) {
3c9740a1 PC	145	device_wakeup_enable(hcd->self.controller);
495a678f	146	return 0;
3c9740a1	147	}
495a678f	148
796bcae7 VB	149	/* by now, 440epx is known to show usb_23 erratum */
	150	np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx");
	151
	152	/* Work around - At this point ohci_run has executed, the
	153	* controller is running, everything, the root ports, etc., is
	154	* set up. If the ehci driver is loaded, put the ohci core in
	155	* the suspended state. The ehci driver will bring it out of
	156	* suspended state when / if a non-high speed USB device is
	157	* attached to the USB Host port. If the ehci driver is not
	158	* loaded, do nothing. request_mem_region is used to test if
	159	* the ehci driver is loaded.
	160	*/
	161	if (np != NULL) {
	162	if (!of_address_to_resource(np, 0, &res)) {
	163	if (!request_mem_region(res.start, 0x4, hcd_name)) {
	164	writel_be((readl_be(&ohci->regs->control) \|
	165	OHCI_USB_SUSPEND), &ohci->regs->control);
	166	(void) readl_be(&ohci->regs->control);
	167	} else
	168	release_mem_region(res.start, 0x4);
	169	} else
f45ba776	170	pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
796bcae7 VB	171	}
796bcae7 VB	172
495a678f	173	irq_dispose_mapping(irq);
495a678f SM	174	err_rmr:
	175	usb_put_hcd(hcd);
	176
	177	return rv;
	178	}
	179
2dc11581	180	static int ohci_hcd_ppc_of_remove(struct platform_device *op)
495a678f	181	{
477527ba	182	struct usb_hcd *hcd = platform_get_drvdata(op);
495a678f SM	183
	184	dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
	185
	186	usb_remove_hcd(hcd);
	187
495a678f	188	irq_dispose_mapping(hcd->irq);
495a678f SM	189
	190	usb_put_hcd(hcd);
	191
	192	return 0;
	193	}
	194
c4386ad0	195	static const struct of_device_id ohci_hcd_ppc_of_match[] = {
495a678f SM	196	#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
	197	{
	198	.name = "usb",
	199	.compatible = "ohci-bigendian",
	200	},
	201	{
	202	.name = "usb",
	203	.compatible = "ohci-be",
	204	},
	205	#endif
	206	#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
	207	{
	208	.name = "usb",
	209	.compatible = "ohci-littledian",
	210	},
	211	{
	212	.name = "usb",
	213	.compatible = "ohci-le",
	214	},
	215	#endif
	216	{},
	217	};
	218	MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
	219
	220	#if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
	221	!defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
1c1301dd	222	#error "No endianness selected for ppc-of-ohci"
495a678f SM	223	#endif
	224
	225
d35fb641	226	static struct platform_driver ohci_hcd_ppc_of_driver = {
495a678f SM	227	.probe = ohci_hcd_ppc_of_probe,
495a678f SM	228	.remove = ohci_hcd_ppc_of_remove,
aaf6b52d	229	.shutdown = usb_hcd_platform_shutdown,
4018294b GL	230	.driver = {
4018294b GL	231	.name = "ppc-of-ohci",
4018294b	232	.of_match_table = ohci_hcd_ppc_of_match,
495a678f SM	233	},
	234	};
	235