[net-next-2.6.git] / drivers / usb / otg / ulpi.c

/*
 * Generic ULPI USB transceiver support
 *
 * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
 *
 * Based on sources from
 *
 *   Sascha Hauer <s.hauer@pengutronix.de>
 *   Freescale Semiconductors
 *
 * 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/kernel.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>

#define ULPI_ID(vendor, product) (((vendor) << 16) | (product))

#define TR_FLAG(flags, a, b)	(((flags) & a) ? b : 0)

/* ULPI hardcoded IDs, used for probing */
static unsigned int ulpi_ids[] = {
	ULPI_ID(0x04cc, 0x1504),	/* NXP ISP1504 */
};

static int ulpi_set_flags(struct otg_transceiver *otg)
{
	unsigned int flags = 0;

	if (otg->flags & USB_OTG_PULLUP_ID)
		flags |= ULPI_OTG_CTRL_ID_PULLUP;

	if (otg->flags & USB_OTG_PULLDOWN_DM)
		flags |= ULPI_OTG_CTRL_DM_PULLDOWN;

	if (otg->flags & USB_OTG_PULLDOWN_DP)
		flags |= ULPI_OTG_CTRL_DP_PULLDOWN;

	if (otg->flags & USB_OTG_EXT_VBUS_INDICATOR)
		flags |= ULPI_OTG_CTRL_EXTVBUSIND;

	return otg_io_write(otg, flags, ULPI_SET(ULPI_OTG_CTRL));
}

static int ulpi_init(struct otg_transceiver *otg)
{
	int i, vid, pid;

	vid = (otg_io_read(otg, ULPI_VENDOR_ID_HIGH) << 8) |
	       otg_io_read(otg, ULPI_VENDOR_ID_LOW);
	pid = (otg_io_read(otg, ULPI_PRODUCT_ID_HIGH) << 8) |
	       otg_io_read(otg, ULPI_PRODUCT_ID_LOW);

	pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid);

	for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++)
		if (ulpi_ids[i] == ULPI_ID(vid, pid))
			return ulpi_set_flags(otg);

	pr_err("ULPI ID does not match any known transceiver.\n");
	return -ENODEV;
}

static int ulpi_set_vbus(struct otg_transceiver *otg, bool on)
{
	unsigned int flags = otg_io_read(otg, ULPI_OTG_CTRL);

	flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT);

	if (on) {
		if (otg->flags & USB_OTG_DRV_VBUS)
			flags |= ULPI_OTG_CTRL_DRVVBUS;

		if (otg->flags & USB_OTG_DRV_VBUS_EXT)
			flags |= ULPI_OTG_CTRL_DRVVBUS_EXT;
	}

	return otg_io_write(otg, flags, ULPI_SET(ULPI_OTG_CTRL));
}

struct otg_transceiver *
otg_ulpi_create(struct otg_io_access_ops *ops,
		unsigned int flags)
{
	struct otg_transceiver *otg;

	otg = kzalloc(sizeof(*otg), GFP_KERNEL);
	if (!otg)
		return NULL;

	otg->label	= "ULPI";
	otg->flags	= flags;
	otg->io_ops	= ops;
	otg->init	= ulpi_init;
	otg->set_vbus	= ulpi_set_vbus;

	return otg;
}
EXPORT_SYMBOL_GPL(otg_ulpi_create);
Commit	Line	Data
2d57a95f DM	1	/*
	2	* Generic ULPI USB transceiver support
	3	*
	4	* Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
	5	*
	6	* Based on sources from
	7	*
	8	* Sascha Hauer <s.hauer@pengutronix.de>
	9	* Freescale Semiconductors
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*/
	25
	26	#include <linux/kernel.h>
5a0e3ad6	27	#include <linux/slab.h>
2d57a95f DM	28	#include <linux/usb.h>
	29	#include <linux/usb/otg.h>
	30	#include <linux/usb/ulpi.h>
	31
2d57a95f DM	32	#define ULPI_ID(vendor, product) (((vendor) << 16) \| (product))
	33
	34	#define TR_FLAG(flags, a, b) (((flags) & a) ? b : 0)
	35
	36	/* ULPI hardcoded IDs, used for probing */
	37	static unsigned int ulpi_ids[] = {
	38	ULPI_ID(0x04cc, 0x1504), /* NXP ISP1504 */
	39	};
	40
	41	static int ulpi_set_flags(struct otg_transceiver *otg)
	42	{
	43	unsigned int flags = 0;
	44
	45	if (otg->flags & USB_OTG_PULLUP_ID)
fc567f06	46	flags \|= ULPI_OTG_CTRL_ID_PULLUP;
2d57a95f DM	47
2d57a95f DM	48	if (otg->flags & USB_OTG_PULLDOWN_DM)
fc567f06	49	flags \|= ULPI_OTG_CTRL_DM_PULLDOWN;
2d57a95f DM	50
2d57a95f DM	51	if (otg->flags & USB_OTG_PULLDOWN_DP)
fc567f06	52	flags \|= ULPI_OTG_CTRL_DP_PULLDOWN;
2d57a95f DM	53
2d57a95f DM	54	if (otg->flags & USB_OTG_EXT_VBUS_INDICATOR)
fc567f06	55	flags \|= ULPI_OTG_CTRL_EXTVBUSIND;
2d57a95f	56
fc567f06	57	return otg_io_write(otg, flags, ULPI_SET(ULPI_OTG_CTRL));
2d57a95f DM	58	}
	59
	60	static int ulpi_init(struct otg_transceiver *otg)
	61	{
	62	int i, vid, pid;
	63
fc567f06 HK	64	vid = (otg_io_read(otg, ULPI_VENDOR_ID_HIGH) << 8) \|
	65	otg_io_read(otg, ULPI_VENDOR_ID_LOW);
	66	pid = (otg_io_read(otg, ULPI_PRODUCT_ID_HIGH) << 8) \|
	67	otg_io_read(otg, ULPI_PRODUCT_ID_LOW);
2d57a95f DM	68
	69	pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid);
	70
	71	for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++)
	72	if (ulpi_ids[i] == ULPI_ID(vid, pid))
	73	return ulpi_set_flags(otg);
	74
	75	pr_err("ULPI ID does not match any known transceiver.\n");
	76	return -ENODEV;
	77	}
	78
	79	static int ulpi_set_vbus(struct otg_transceiver *otg, bool on)
	80	{
fc567f06	81	unsigned int flags = otg_io_read(otg, ULPI_OTG_CTRL);
2d57a95f	82
fc567f06	83	flags &= ~(ULPI_OTG_CTRL_DRVVBUS \| ULPI_OTG_CTRL_DRVVBUS_EXT);
2d57a95f DM	84
	85	if (on) {
	86	if (otg->flags & USB_OTG_DRV_VBUS)
fc567f06	87	flags \|= ULPI_OTG_CTRL_DRVVBUS;
2d57a95f DM	88
2d57a95f DM	89	if (otg->flags & USB_OTG_DRV_VBUS_EXT)
fc567f06	90	flags \|= ULPI_OTG_CTRL_DRVVBUS_EXT;
2d57a95f DM	91	}
2d57a95f DM	92
fc567f06	93	return otg_io_write(otg, flags, ULPI_SET(ULPI_OTG_CTRL));
2d57a95f DM	94	}
	95
	96	struct otg_transceiver *
	97	otg_ulpi_create(struct otg_io_access_ops *ops,
	98	unsigned int flags)
	99	{
	100	struct otg_transceiver *otg;
	101
	102	otg = kzalloc(sizeof(*otg), GFP_KERNEL);
	103	if (!otg)
	104	return NULL;
	105
	106	otg->label = "ULPI";
	107	otg->flags = flags;
	108	otg->io_ops = ops;
	109	otg->init = ulpi_init;
	110	otg->set_vbus = ulpi_set_vbus;
	111
	112	return otg;
	113	}
	114	EXPORT_SYMBOL_GPL(otg_ulpi_create);
	115