[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;
static int (*orig_bus_suspend)(struct usb_hcd *hcd);

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;
	int ret = 0;
	int port = HCS_N_PORTS(ehci->hcs_params);

	if (priv->reg_vbus) {
		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;

	dev_set_drvdata(ci->dev, ci);
	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 && !ci_otg_is_fsm_mode(ci)) {
		if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
			ret = regulator_enable(ci->platdata->reg_vbus);
			if (ret) {
				dev_err(ci->dev,
				"Failed to enable vbus regulator, ret=%d\n",
									ret);
				goto put_hcd;
			}
		} else {
			priv->reg_vbus = ci->platdata->reg_vbus;
		}
	}

	ret = usb_add_hcd(hcd, 0, 0);
	if (ret) {
		goto disable_reg;
	} 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);

	if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED)
		hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);

	return ret;

disable_reg:
	if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
			(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
		regulator_disable(ci->platdata->reg_vbus);
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);
		if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
			(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
				regulator_disable(ci->platdata->reg_vbus);
	}
}


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

static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int port;
	u32 tmp;

	int ret = orig_bus_suspend(hcd);

	if (ret)
		return ret;

	port = HCS_N_PORTS(ehci->hcs_params);
	while (port--) {
		u32 __iomem *reg = &ehci->regs->port_status[port];
		u32 portsc = ehci_readl(ehci, reg);

		if (portsc & PORT_CONNECT) {
			/*
			 * For chipidea, the resume signal will be ended
			 * automatically, so for remote wakeup case, the
			 * usbcmd.rs may not be set before the resume has
			 * ended if other resume paths consumes too much
			 * time (~24ms), in that case, the SOF will not
			 * send out within 3ms after resume ends, then the
			 * high speed device will enter full speed mode.
			 */

			tmp = ehci_readl(ehci, &ehci->regs->command);
			tmp |= CMD_RUN;
			ehci_writel(ehci, tmp, &ehci->regs->command);
			/*
			 * It needs a short delay between set RS bit and PHCD.
			 */
			usleep_range(150, 200);
			break;
		}
	}

	return 0;
}

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);
	orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
	ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;

	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	35	static struct hc_driver __read_mostly ci_ehci_hc_driver;
78f0357e	36	static int (orig_bus_suspend)(struct usb_hcd hcd);
09f6ffde	37
c8679a2f MG	38	struct ehci_ci_priv {
	39	struct regulator *reg_vbus;
	40	};
	41
	42	static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
	43	{
	44	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	45	struct ehci_ci_priv priv = (struct ehci_ci_priv )ehci->priv;
	46	struct device *dev = hcd->self.controller;
c8679a2f MG	47	int ret = 0;
	48	int port = HCS_N_PORTS(ehci->hcs_params);
	49
65945917	50	if (priv->reg_vbus) {
c8679a2f MG	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
24c498df	94	dev_set_drvdata(ci->dev, ci);
eb70e5ab AS	95	hcd->rsrc_start = ci->hw_bank.phys;
	96	hcd->rsrc_len = ci->hw_bank.size;
	97	hcd->regs = ci->hw_bank.abs;
	98	hcd->has_tt = 1;
	99
77c4400f	100	hcd->power_budget = ci->platdata->power_budget;
f6a9ff07	101	hcd->tpl_support = ci->platdata->tpl_support;
1e5e2d3d AT	102	if (ci->phy)
	103	hcd->phy = ci->phy;
	104	else
	105	hcd->usb_phy = ci->usb_phy;
bd841986	106
eb70e5ab AS	107	ehci = hcd_to_ehci(hcd);
	108	ehci->caps = ci->hw_bank.cap;
	109	ehci->has_hostpc = ci->hw_bank.lpm;
2cdcec4f	110	ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
ed8f8318	111	ehci->imx28_write_fix = ci->imx28_write_fix;
eb70e5ab	112
c8679a2f MG	113	priv = (struct ehci_ci_priv *)ehci->priv;
	114	priv->reg_vbus = NULL;
	115
65945917 LJ	116	if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
	117	if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
	118	ret = regulator_enable(ci->platdata->reg_vbus);
	119	if (ret) {
	120	dev_err(ci->dev,
	121	"Failed to enable vbus regulator, ret=%d\n",
	122	ret);
	123	goto put_hcd;
	124	}
	125	} else {
	126	priv->reg_vbus = ci->platdata->reg_vbus;
	127	}
	128	}
40ed51a4	129
eb70e5ab	130	ret = usb_add_hcd(hcd, 0, 0);
0698b9b3	131	if (ret) {
65945917	132	goto disable_reg;
0698b9b3	133	} else {
ef44cb42	134	struct usb_otg *otg = &ci->otg;
0698b9b3	135
eb70e5ab	136	ci->hcd = hcd;
ef44cb42 AT	137
ef44cb42 AT	138	if (ci_otg_is_fsm_mode(ci)) {
0698b9b3 LJ	139	otg->host = &hcd->self;
	140	hcd->self.otg_port = 1;
	141	}
	142	}
eb70e5ab	143
8e22978c	144	if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
929473ea FE	145	hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
929473ea FE	146
905276c4 DT	147	if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED)
	148	hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
	149
eb70e5ab	150	return ret;
40ed51a4	151
65945917 LJ	152	disable_reg:
	153	if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
	154	(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
	155	regulator_disable(ci->platdata->reg_vbus);
40ed51a4 PC	156	put_hcd:
	157	usb_put_hcd(hcd);
	158
	159	return ret;
eb70e5ab AS	160	}
eb70e5ab AS	161
8e22978c	162	static void host_stop(struct ci_hdrc *ci)
eb70e5ab AS	163	{
	164	struct usb_hcd *hcd = ci->hcd;
	165
41314fea RKAL	166	if (hcd) {
	167	usb_remove_hcd(hcd);
	168	usb_put_hcd(hcd);
65945917 LJ	169	if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
	170	(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
	171	regulator_disable(ci->platdata->reg_vbus);
41314fea	172	}
eb70e5ab AS	173	}
eb70e5ab AS	174
3f124d23 PC	175
	176	void ci_hdrc_host_destroy(struct ci_hdrc *ci)
	177	{
df101c53	178	if (ci->role == CI_ROLE_HOST && ci->hcd)
3f124d23 PC	179	host_stop(ci);
	180	}
	181
78f0357e PC	182	static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
	183	{
	184	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	185	int port;
	186	u32 tmp;
	187
	188	int ret = orig_bus_suspend(hcd);
	189
	190	if (ret)
	191	return ret;
	192
	193	port = HCS_N_PORTS(ehci->hcs_params);
	194	while (port--) {
	195	u32 __iomem *reg = &ehci->regs->port_status[port];
	196	u32 portsc = ehci_readl(ehci, reg);
	197
	198	if (portsc & PORT_CONNECT) {
	199	/*
	200	* For chipidea, the resume signal will be ended
	201	* automatically, so for remote wakeup case, the
	202	* usbcmd.rs may not be set before the resume has
	203	* ended if other resume paths consumes too much
	204	* time (~24ms), in that case, the SOF will not
	205	* send out within 3ms after resume ends, then the
	206	* high speed device will enter full speed mode.
	207	*/
	208
	209	tmp = ehci_readl(ehci, &ehci->regs->command);
	210	tmp \|= CMD_RUN;
	211	ehci_writel(ehci, tmp, &ehci->regs->command);
	212	/*
	213	* It needs a short delay between set RS bit and PHCD.
	214	*/
	215	usleep_range(150, 200);
	216	break;
	217	}
	218	}
	219
	220	return 0;
	221	}
	222
8e22978c	223	int ci_hdrc_host_init(struct ci_hdrc *ci)
eb70e5ab AS	224	{
	225	struct ci_role_driver *rdrv;
	226
	227	if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
	228	return -ENXIO;
	229
	230	rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
	231	if (!rdrv)
	232	return -ENOMEM;
	233
	234	rdrv->start = host_start;
	235	rdrv->stop = host_stop;
	236	rdrv->irq = host_irq;
	237	rdrv->name = "host";
	238	ci->roles[CI_ROLE_HOST] = rdrv;
	239
c8679a2f	240	ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
78f0357e PC	241	orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
78f0357e PC	242	ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
09f6ffde	243
eb70e5ab AS	244	return 0;
eb70e5ab AS	245	}