[deliverable/linux.git] / drivers / usb / host / ehci-grlib.c

/*
 * Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller
 *
 * GRUSBHC is typically found on LEON/GRLIB SoCs
 *
 * (c) Jan Andersson <jan@gaisler.com>
 *
 * Based on ehci-ppc-of.c which is:
 * (c) Valentine Barshak <vbarshak@ru.mvista.com>
 * and in turn based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
 * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/err.h>
#include <linux/signal.h>

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

#define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */

static const struct hc_driver ehci_grlib_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "GRLIB GRUSBHC EHCI",
	.hcd_priv_size		= sizeof(struct ehci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq			= ehci_irq,
	.flags			= HCD_MEMORY | HCD_USB2,

	/*
	 * basic lifecycle operations
	 */
	.reset			= ehci_setup,
	.start			= ehci_run,
	.stop			= ehci_stop,
	.shutdown		= ehci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue		= ehci_urb_enqueue,
	.urb_dequeue		= ehci_urb_dequeue,
	.endpoint_disable	= ehci_endpoint_disable,
	.endpoint_reset		= ehci_endpoint_reset,

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

	/*
	 * root hub support
	 */
	.hub_status_data	= ehci_hub_status_data,
	.hub_control		= ehci_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend		= ehci_bus_suspend,
	.bus_resume		= ehci_bus_resume,
#endif
	.relinquish_port	= ehci_relinquish_port,
	.port_handed_over	= ehci_port_handed_over,

	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
};


static int ehci_hcd_grlib_probe(struct platform_device *op)
{
	struct device_node *dn = op->dev.of_node;
	struct usb_hcd *hcd;
	struct ehci_hcd	*ehci = NULL;
	struct resource res;
	u32 hc_capbase;
	int irq;
	int rv;

	if (usb_disabled())
		return -ENODEV;

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

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

	/* usb_create_hcd requires dma_mask != NULL */
	op->dev.dma_mask = &op->dev.coherent_dma_mask;
	hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
			"GRUSBHC EHCI USB");
	if (!hcd)
		return -ENOMEM;

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

	irq = irq_of_parse_and_map(dn, 0);
	if (irq == NO_IRQ) {
		printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
		rv = -EBUSY;
		goto err_irq;
	}

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

	ehci = hcd_to_ehci(hcd);

	ehci->caps = hcd->regs;

	/* determine endianness of this implementation */
	hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
	if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
		ehci->big_endian_mmio = 1;
		ehci->big_endian_desc = 1;
		ehci->big_endian_capbase = 1;
	}

	rv = usb_add_hcd(hcd, irq, 0);
	if (rv)
		goto err_ioremap;

	return 0;

err_ioremap:
	irq_dispose_mapping(irq);
err_irq:
	usb_put_hcd(hcd);

	return rv;
}


static int ehci_hcd_grlib_remove(struct platform_device *op)
{
	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);

	dev_set_drvdata(&op->dev, NULL);

	dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");

	usb_remove_hcd(hcd);

	irq_dispose_mapping(hcd->irq);

	usb_put_hcd(hcd);

	return 0;
}


static void ehci_hcd_grlib_shutdown(struct platform_device *op)
{
	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);

	if (hcd->driver->shutdown)
		hcd->driver->shutdown(hcd);
}


static const struct of_device_id ehci_hcd_grlib_of_match[] = {
	{
		.name = "GAISLER_EHCI",
	 },
	{
		.name = "01_026",
	 },
	{},
};
MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);


static struct platform_driver ehci_grlib_driver = {
	.probe		= ehci_hcd_grlib_probe,
	.remove		= ehci_hcd_grlib_remove,
	.shutdown	= ehci_hcd_grlib_shutdown,
	.driver = {
		.name = "grlib-ehci",
		.owner = THIS_MODULE,
		.of_match_table = ehci_hcd_grlib_of_match,
	},
};
Commit	Line	Data
9be03929 JA	1	/*
	2	* Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller
	3	*
	4	* GRUSBHC is typically found on LEON/GRLIB SoCs
	5	*
	6	* (c) Jan Andersson <jan@gaisler.com>
	7	*
	8	* Based on ehci-ppc-of.c which is:
	9	* (c) Valentine Barshak <vbarshak@ru.mvista.com>
	10	* and in turn based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
	11	* and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
	12	*
	13	* This program is free software; you can redistribute it and/or modify it
	14	* under the terms of the GNU General Public License as published by the
	15	* Free Software Foundation; either version 2 of the License, or (at your
	16	* option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful, but
	19	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	20	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	21	* for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software Foundation,
	25	* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	26	*/
	27
148e1134	28	#include <linux/err.h>
9be03929 JA	29	#include <linux/signal.h>
	30
	31	#include <linux/of_irq.h>
	32	#include <linux/of_address.h>
	33	#include <linux/of_platform.h>
	34
	35	#define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */
	36
9be03929 JA	37	static const struct hc_driver ehci_grlib_hc_driver = {
	38	.description = hcd_name,
	39	.product_desc = "GRLIB GRUSBHC EHCI",
	40	.hcd_priv_size = sizeof(struct ehci_hcd),
	41
	42	/*
	43	* generic hardware linkage
	44	*/
	45	.irq = ehci_irq,
	46	.flags = HCD_MEMORY \| HCD_USB2,
	47
	48	/*
	49	* basic lifecycle operations
	50	*/
c73cee71	51	.reset = ehci_setup,
9be03929 JA	52	.start = ehci_run,
	53	.stop = ehci_stop,
	54	.shutdown = ehci_shutdown,
	55
	56	/*
	57	* managing i/o requests and associated device resources
	58	*/
	59	.urb_enqueue = ehci_urb_enqueue,
	60	.urb_dequeue = ehci_urb_dequeue,
	61	.endpoint_disable = ehci_endpoint_disable,
	62	.endpoint_reset = ehci_endpoint_reset,
	63
	64	/*
	65	* scheduling support
	66	*/
	67	.get_frame_number = ehci_get_frame,
	68
	69	/*
	70	* root hub support
	71	*/
	72	.hub_status_data = ehci_hub_status_data,
	73	.hub_control = ehci_hub_control,
	74	#ifdef CONFIG_PM
	75	.bus_suspend = ehci_bus_suspend,
	76	.bus_resume = ehci_bus_resume,
	77	#endif
	78	.relinquish_port = ehci_relinquish_port,
	79	.port_handed_over = ehci_port_handed_over,
	80
	81	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
	82	};
	83
	84
41ac7b3a	85	static int ehci_hcd_grlib_probe(struct platform_device *op)
9be03929 JA	86	{
	87	struct device_node *dn = op->dev.of_node;
	88	struct usb_hcd *hcd;
	89	struct ehci_hcd *ehci = NULL;
	90	struct resource res;
	91	u32 hc_capbase;
	92	int irq;
	93	int rv;
	94
	95	if (usb_disabled())
	96	return -ENODEV;
	97
	98	dev_dbg(&op->dev, "initializing GRUSBHC EHCI USB Controller\n");
	99
	100	rv = of_address_to_resource(dn, 0, &res);
	101	if (rv)
	102	return rv;
	103
	104	/* usb_create_hcd requires dma_mask != NULL */
	105	op->dev.dma_mask = &op->dev.coherent_dma_mask;
	106	hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
	107	"GRUSBHC EHCI USB");
	108	if (!hcd)
	109	return -ENOMEM;
	110
	111	hcd->rsrc_start = res.start;
28f65c11	112	hcd->rsrc_len = resource_size(&res);
9be03929	113
9be03929 JA	114	irq = irq_of_parse_and_map(dn, 0);
	115	if (irq == NO_IRQ) {
	116	printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
	117	rv = -EBUSY;
	118	goto err_irq;
	119	}
	120
148e1134 TR	121	hcd->regs = devm_ioremap_resource(&op->dev, &res);
	122	if (IS_ERR(hcd->regs)) {
	123	rv = PTR_ERR(hcd->regs);
9be03929 JA	124	goto err_ioremap;
	125	}
	126
	127	ehci = hcd_to_ehci(hcd);
	128
	129	ehci->caps = hcd->regs;
	130
	131	/* determine endianness of this implementation */
	132	hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
	133	if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
	134	ehci->big_endian_mmio = 1;
	135	ehci->big_endian_desc = 1;
	136	ehci->big_endian_capbase = 1;
	137	}
	138
9be03929 JA	139	rv = usb_add_hcd(hcd, irq, 0);
9be03929 JA	140	if (rv)
436f2719	141	goto err_ioremap;
9be03929 JA	142
	143	return 0;
	144
9be03929 JA	145	err_ioremap:
	146	irq_dispose_mapping(irq);
	147	err_irq:
9be03929 JA	148	usb_put_hcd(hcd);
	149
	150	return rv;
	151	}
	152
	153
	154	static int ehci_hcd_grlib_remove(struct platform_device *op)
	155	{
	156	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
	157
	158	dev_set_drvdata(&op->dev, NULL);
	159
	160	dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
	161
	162	usb_remove_hcd(hcd);
	163
9be03929	164	irq_dispose_mapping(hcd->irq);
9be03929 JA	165
	166	usb_put_hcd(hcd);
	167
	168	return 0;
	169	}
	170
	171
	172	static void ehci_hcd_grlib_shutdown(struct platform_device *op)
	173	{
	174	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
	175
	176	if (hcd->driver->shutdown)
	177	hcd->driver->shutdown(hcd);
	178	}
	179
	180
	181	static const struct of_device_id ehci_hcd_grlib_of_match[] = {
	182	{
	183	.name = "GAISLER_EHCI",
	184	},
	185	{
	186	.name = "01_026",
	187	},
	188	{},
	189	};
	190	MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);
	191
	192
	193	static struct platform_driver ehci_grlib_driver = {
	194	.probe = ehci_hcd_grlib_probe,
	195	.remove = ehci_hcd_grlib_remove,
	196	.shutdown = ehci_hcd_grlib_shutdown,
	197	.driver = {
	198	.name = "grlib-ehci",
	199	.owner = THIS_MODULE,
	200	.of_match_table = ehci_hcd_grlib_of_match,
	201	},
	202	};