[deliverable/linux.git] / drivers / usb / chipidea / host.c

/*
 * host.c - ChipIdea USB host controller driver
 *
 * Copyright (c) 2012 Intel Corporation
 *
 * Author: Alexander Shishkin
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/chipidea.h>
#include <linux/regulator/consumer.h>

#include "../host/ehci.h"

#include "ci.h"
#include "bits.h"
#include "host.h"

static struct hc_driver __read_mostly ci_ehci_hc_driver;

struct ehci_ci_priv {
	struct regulator *reg_vbus;
};

static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
	struct device *dev = hcd->self.controller;
	struct ci_hdrc *ci = dev_get_drvdata(dev);
	int ret = 0;
	int port = HCS_N_PORTS(ehci->hcs_params);

	if (priv->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
		if (port > 1) {
			dev_warn(dev,
				"Not support multi-port regulator control\n");
			return 0;
		}
		if (enable)
			ret = regulator_enable(priv->reg_vbus);
		else
			ret = regulator_disable(priv->reg_vbus);
		if (ret) {
			dev_err(dev,
				"Failed to %s vbus regulator, ret=%d\n",
				enable ? "enable" : "disable", ret);
			return ret;
		}
	}
	return 0;
};

static const struct ehci_driver_overrides ehci_ci_overrides = {
	.extra_priv_size = sizeof(struct ehci_ci_priv),
	.port_power	 = ehci_ci_portpower,
};

static irqreturn_t host_irq(struct ci_hdrc *ci)
{
	return usb_hcd_irq(ci->irq, ci->hcd);
}

static int host_start(struct ci_hdrc *ci)
{
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct ehci_ci_priv *priv;
	int ret;

	if (usb_disabled())
		return -ENODEV;

	hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
	if (!hcd)
		return -ENOMEM;

	hcd->rsrc_start = ci->hw_bank.phys;
	hcd->rsrc_len = ci->hw_bank.size;
	hcd->regs = ci->hw_bank.abs;
	hcd->has_tt = 1;

	hcd->power_budget = ci->platdata->power_budget;
	hcd->tpl_support = ci->platdata->tpl_support;
	if (ci->phy)
		hcd->phy = ci->phy;
	else
		hcd->usb_phy = ci->usb_phy;

	ehci = hcd_to_ehci(hcd);
	ehci->caps = ci->hw_bank.cap;
	ehci->has_hostpc = ci->hw_bank.lpm;
	ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
	ehci->imx28_write_fix = ci->imx28_write_fix;

	priv = (struct ehci_ci_priv *)ehci->priv;
	priv->reg_vbus = NULL;

	if (ci->platdata->reg_vbus)
		priv->reg_vbus = ci->platdata->reg_vbus;

	ret = usb_add_hcd(hcd, 0, 0);
	if (ret) {
		goto put_hcd;
	} else {
		struct usb_otg *otg = &ci->otg;

		ci->hcd = hcd;

		if (ci_otg_is_fsm_mode(ci)) {
			otg->host = &hcd->self;
			hcd->self.otg_port = 1;
		}
	}

	if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
		hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);

	return ret;

put_hcd:
	usb_put_hcd(hcd);

	return ret;
}

static void host_stop(struct ci_hdrc *ci)
{
	struct usb_hcd *hcd = ci->hcd;

	if (hcd) {
		usb_remove_hcd(hcd);
		usb_put_hcd(hcd);
	}
}


void ci_hdrc_host_destroy(struct ci_hdrc *ci)
{
	if (ci->role == CI_ROLE_HOST && ci->hcd)
		host_stop(ci);
}

int ci_hdrc_host_init(struct ci_hdrc *ci)
{
	struct ci_role_driver *rdrv;

	if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
		return -ENXIO;

	rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
	if (!rdrv)
		return -ENOMEM;

	rdrv->start	= host_start;
	rdrv->stop	= host_stop;
	rdrv->irq	= host_irq;
	rdrv->name	= "host";
	ci->roles[CI_ROLE_HOST] = rdrv;

	ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);

	return 0;
}
Commit	Line	Data
eb70e5ab AS	1	/*
	2	* host.c - ChipIdea USB host controller driver
	3	*
	4	* Copyright (c) 2012 Intel Corporation
	5	*
	6	* Author: Alexander Shishkin
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/kernel.h>
cdb2fac7	23	#include <linux/io.h>
eb70e5ab AS	24	#include <linux/usb.h>
	25	#include <linux/usb/hcd.h>
	26	#include <linux/usb/chipidea.h>
40ed51a4	27	#include <linux/regulator/consumer.h>
eb70e5ab	28
09f6ffde	29	#include "../host/ehci.h"
eb70e5ab AS	30
	31	#include "ci.h"
	32	#include "bits.h"
	33	#include "host.h"
	34
09f6ffde AS	35	static struct hc_driver __read_mostly ci_ehci_hc_driver;
09f6ffde AS	36
c8679a2f MG	37	struct ehci_ci_priv {
	38	struct regulator *reg_vbus;
	39	};
	40
	41	static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
	42	{
	43	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	44	struct ehci_ci_priv priv = (struct ehci_ci_priv )ehci->priv;
	45	struct device *dev = hcd->self.controller;
	46	struct ci_hdrc *ci = dev_get_drvdata(dev);
	47	int ret = 0;
	48	int port = HCS_N_PORTS(ehci->hcs_params);
	49
	50	if (priv->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
	51	if (port > 1) {
	52	dev_warn(dev,
	53	"Not support multi-port regulator control\n");
	54	return 0;
	55	}
	56	if (enable)
	57	ret = regulator_enable(priv->reg_vbus);
	58	else
	59	ret = regulator_disable(priv->reg_vbus);
	60	if (ret) {
	61	dev_err(dev,
	62	"Failed to %s vbus regulator, ret=%d\n",
	63	enable ? "enable" : "disable", ret);
	64	return ret;
	65	}
	66	}
	67	return 0;
	68	};
	69
	70	static const struct ehci_driver_overrides ehci_ci_overrides = {
	71	.extra_priv_size = sizeof(struct ehci_ci_priv),
	72	.port_power = ehci_ci_portpower,
	73	};
	74
8e22978c	75	static irqreturn_t host_irq(struct ci_hdrc *ci)
eb70e5ab AS	76	{
	77	return usb_hcd_irq(ci->irq, ci->hcd);
	78	}
	79
8e22978c	80	static int host_start(struct ci_hdrc *ci)
eb70e5ab AS	81	{
	82	struct usb_hcd *hcd;
	83	struct ehci_hcd *ehci;
c8679a2f	84	struct ehci_ci_priv *priv;
eb70e5ab AS	85	int ret;
	86
	87	if (usb_disabled())
	88	return -ENODEV;
	89
	90	hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
	91	if (!hcd)
	92	return -ENOMEM;
	93
eb70e5ab AS	94	hcd->rsrc_start = ci->hw_bank.phys;
	95	hcd->rsrc_len = ci->hw_bank.size;
	96	hcd->regs = ci->hw_bank.abs;
	97	hcd->has_tt = 1;
	98
77c4400f	99	hcd->power_budget = ci->platdata->power_budget;
f6a9ff07	100	hcd->tpl_support = ci->platdata->tpl_support;
1e5e2d3d AT	101	if (ci->phy)
	102	hcd->phy = ci->phy;
	103	else
	104	hcd->usb_phy = ci->usb_phy;
bd841986	105
eb70e5ab AS	106	ehci = hcd_to_ehci(hcd);
	107	ehci->caps = ci->hw_bank.cap;
	108	ehci->has_hostpc = ci->hw_bank.lpm;
2cdcec4f	109	ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
ed8f8318	110	ehci->imx28_write_fix = ci->imx28_write_fix;
eb70e5ab	111
c8679a2f MG	112	priv = (struct ehci_ci_priv *)ehci->priv;
	113	priv->reg_vbus = NULL;
	114
	115	if (ci->platdata->reg_vbus)
	116	priv->reg_vbus = ci->platdata->reg_vbus;
40ed51a4	117
eb70e5ab	118	ret = usb_add_hcd(hcd, 0, 0);
0698b9b3	119	if (ret) {
c8679a2f	120	goto put_hcd;
0698b9b3	121	} else {
ef44cb42	122	struct usb_otg *otg = &ci->otg;
0698b9b3	123
eb70e5ab	124	ci->hcd = hcd;
ef44cb42 AT	125
ef44cb42 AT	126	if (ci_otg_is_fsm_mode(ci)) {
0698b9b3 LJ	127	otg->host = &hcd->self;
	128	hcd->self.otg_port = 1;
	129	}
	130	}
eb70e5ab	131
8e22978c	132	if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
929473ea FE	133	hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
929473ea FE	134
eb70e5ab	135	return ret;
40ed51a4	136
40ed51a4 PC	137	put_hcd:
	138	usb_put_hcd(hcd);
	139
	140	return ret;
eb70e5ab AS	141	}
eb70e5ab AS	142
8e22978c	143	static void host_stop(struct ci_hdrc *ci)
eb70e5ab AS	144	{
	145	struct usb_hcd *hcd = ci->hcd;
	146
41314fea RKAL	147	if (hcd) {
	148	usb_remove_hcd(hcd);
	149	usb_put_hcd(hcd);
	150	}
eb70e5ab AS	151	}
eb70e5ab AS	152
3f124d23 PC	153
	154	void ci_hdrc_host_destroy(struct ci_hdrc *ci)
	155	{
df101c53	156	if (ci->role == CI_ROLE_HOST && ci->hcd)
3f124d23 PC	157	host_stop(ci);
	158	}
	159
8e22978c	160	int ci_hdrc_host_init(struct ci_hdrc *ci)
eb70e5ab AS	161	{
	162	struct ci_role_driver *rdrv;
	163
	164	if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
	165	return -ENXIO;
	166
	167	rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
	168	if (!rdrv)
	169	return -ENOMEM;
	170
	171	rdrv->start = host_start;
	172	rdrv->stop = host_stop;
	173	rdrv->irq = host_irq;
	174	rdrv->name = "host";
	175	ci->roles[CI_ROLE_HOST] = rdrv;
	176
c8679a2f	177	ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
09f6ffde	178
eb70e5ab AS	179	return 0;
eb70e5ab AS	180	}