[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/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 */

/* called during probe() after chip reset completes */
static int ehci_grlib_setup(struct usb_hcd *hcd)
{
	struct ehci_hcd	*ehci = hcd_to_ehci(hcd);
	int		retval;

	retval = ehci_halt(ehci);
	if (retval)
		return retval;

	retval = ehci_init(hcd);
	if (retval)
		return retval;

	ehci->sbrn = 0x20;
	ehci_port_power(ehci, 1);

	return ehci_reset(ehci);
}


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_grlib_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 __devinit 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);

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
		rv = -EBUSY;
		goto err_rmr;
	}

	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 = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
		rv = -ENOMEM;
		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;
	}

	ehci->regs = hcd->regs +
		HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));

	/* cache this readonly data; minimize chip reads */
	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);

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

	return 0;

err_ehci:
	iounmap(hcd->regs);
err_ioremap:
	irq_dispose_mapping(irq);
err_irq:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_rmr:
	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);

	iounmap(hcd->regs);
	irq_dispose_mapping(hcd->irq);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

	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
	28
	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
	37	/* called during probe() after chip reset completes */
	38	static int ehci_grlib_setup(struct usb_hcd *hcd)
	39	{
	40	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	41	int retval;
	42
	43	retval = ehci_halt(ehci);
	44	if (retval)
	45	return retval;
	46
	47	retval = ehci_init(hcd);
	48	if (retval)
	49	return retval;
	50
	51	ehci->sbrn = 0x20;
	52	ehci_port_power(ehci, 1);
	53
	54	return ehci_reset(ehci);
	55	}
	56
	57
	58	static const struct hc_driver ehci_grlib_hc_driver = {
	59	.description = hcd_name,
	60	.product_desc = "GRLIB GRUSBHC EHCI",
	61	.hcd_priv_size = sizeof(struct ehci_hcd),
	62
	63	/*
	64	* generic hardware linkage
65	*/
66	.irq = ehci_irq,
67	.flags = HCD_MEMORY \| HCD_USB2,
68
69	/*
70	* basic lifecycle operations
71	*/
72	.reset = ehci_grlib_setup,
73	.start = ehci_run,
74	.stop = ehci_stop,
75	.shutdown = ehci_shutdown,
76
77	/*
78	* managing i/o requests and associated device resources
79	*/
80	.urb_enqueue = ehci_urb_enqueue,
81	.urb_dequeue = ehci_urb_dequeue,
82	.endpoint_disable = ehci_endpoint_disable,
83	.endpoint_reset = ehci_endpoint_reset,
84
85	/*
86	* scheduling support
87	*/
88	.get_frame_number = ehci_get_frame,
89
90	/*
91	* root hub support
92	*/
93	.hub_status_data = ehci_hub_status_data,
94	.hub_control = ehci_hub_control,
95	#ifdef CONFIG_PM
96	.bus_suspend = ehci_bus_suspend,
97	.bus_resume = ehci_bus_resume,
98	#endif
99	.relinquish_port = ehci_relinquish_port,
100	.port_handed_over = ehci_port_handed_over,
101
102	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
103	};
104
105
106	static int __devinit ehci_hcd_grlib_probe(struct platform_device *op)
107	{
108	struct device_node *dn = op->dev.of_node;
109	struct usb_hcd *hcd;
110	struct ehci_hcd *ehci = NULL;
111	struct resource res;
112	u32 hc_capbase;
113	int irq;
114	int rv;
115
116	if (usb_disabled())
117	return -ENODEV;
118
119	dev_dbg(&op->dev, "initializing GRUSBHC EHCI USB Controller\n");
120
121	rv = of_address_to_resource(dn, 0, &res);
122	if (rv)
123	return rv;
124
125	/* usb_create_hcd requires dma_mask != NULL */
126	op->dev.dma_mask = &op->dev.coherent_dma_mask;
127	hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
128	"GRUSBHC EHCI USB");
129	if (!hcd)
130	return -ENOMEM;
131
132	hcd->rsrc_start = res.start;
28f65c11	133	hcd->rsrc_len = resource_size(&res);
9be03929 JA	134
	135	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	136	printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
	137	rv = -EBUSY;
	138	goto err_rmr;
	139	}
	140
	141	irq = irq_of_parse_and_map(dn, 0);
	142	if (irq == NO_IRQ) {
	143	printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
	144	rv = -EBUSY;
	145	goto err_irq;
	146	}
	147
	148	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	149	if (!hcd->regs) {
	150	printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
	151	rv = -ENOMEM;
	152	goto err_ioremap;
	153	}
	154
	155	ehci = hcd_to_ehci(hcd);
	156
	157	ehci->caps = hcd->regs;
	158
	159	/* determine endianness of this implementation */
	160	hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
	161	if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
	162	ehci->big_endian_mmio = 1;
	163	ehci->big_endian_desc = 1;
	164	ehci->big_endian_capbase = 1;
	165	}
	166
	167	ehci->regs = hcd->regs +
	168	HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
	169
	170	/* cache this readonly data; minimize chip reads */
	171	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
	172
	173	rv = usb_add_hcd(hcd, irq, 0);
	174	if (rv)
	175	goto err_ehci;
	176
	177	return 0;
	178
	179	err_ehci:
	180	iounmap(hcd->regs);
	181	err_ioremap:
	182	irq_dispose_mapping(irq);
	183	err_irq:
	184	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	185	err_rmr:
	186	usb_put_hcd(hcd);
	187
	188	return rv;
	189	}
	190
	191
	192	static int ehci_hcd_grlib_remove(struct platform_device *op)
	193	{
	194	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
	195
	196	dev_set_drvdata(&op->dev, NULL);
	197
198	dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
199
200	usb_remove_hcd(hcd);
201
202	iounmap(hcd->regs);
203	irq_dispose_mapping(hcd->irq);
204	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
205
206	usb_put_hcd(hcd);
207
208	return 0;
209	}
210
211
212	static void ehci_hcd_grlib_shutdown(struct platform_device *op)
213	{
214	struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
215
216	if (hcd->driver->shutdown)
217	hcd->driver->shutdown(hcd);
218	}
219
220
221	static const struct of_device_id ehci_hcd_grlib_of_match[] = {
222	{
223	.name = "GAISLER_EHCI",
224	},
225	{
226	.name = "01_026",
227	},
228	{},
229	};
230	MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);
231
232
233	static struct platform_driver ehci_grlib_driver = {
234	.probe = ehci_hcd_grlib_probe,
235	.remove = ehci_hcd_grlib_remove,
236	.shutdown = ehci_hcd_grlib_shutdown,
237	.driver = {
238	.name = "grlib-ehci",
239	.owner = THIS_MODULE,
240	.of_match_table = ehci_hcd_grlib_of_match,
241	},
242	};