Release 4.7 drivers/usb/phy/phy-ab8500-usb.c

/*
 * USB transceiver driver for AB8500 family chips
 *
 * Copyright (C) 2010-2013 ST-Ericsson AB
 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
 * Avinash Kumar <avinash.kumar@stericsson.com>
 * Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.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/module.h>
#include <linux/platform_device.h>
#include <linux/usb/otg.h>
#include <linux/slab.h>
#include <linux/notifier.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/usb/musb-ux500.h>
#include <linux/regulator/consumer.h>
#include <linux/pinctrl/consumer.h>

/* Bank AB8500_SYS_CTRL2_BLOCK */

#define AB8500_MAIN_WD_CTRL_REG 0x01

/* Bank AB8500_USB */

#define AB8500_USB_LINE_STAT_REG 0x80

#define AB8505_USB_LINE_STAT_REG 0x94

#define AB8540_USB_LINK_STAT_REG 0x94

#define AB9540_USB_LINK_STAT_REG 0x94

#define AB8540_USB_OTG_CTL_REG 0x87

#define AB8500_USB_PHY_CTRL_REG 0x8A

#define AB8540_VBUS_CTRL_REG 0x82

/* Bank AB8500_DEVELOPMENT */

#define AB8500_BANK12_ACCESS 0x00

/* Bank AB8500_DEBUG */

#define AB8540_DEBUG 0x32

#define AB8500_USB_PHY_TUNE1 0x05

#define AB8500_USB_PHY_TUNE2 0x06

#define AB8500_USB_PHY_TUNE3 0x07

/* Bank AB8500_INTERRUPT */

#define AB8500_IT_SOURCE2_REG 0x01


#define AB8500_BIT_OTG_STAT_ID (1 << 0)

#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)

#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)

#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0)

#define AB8500_BIT_WD_CTRL_KICK (1 << 1)

#define AB8500_BIT_SOURCE2_VBUSDET (1 << 7)

#define AB8540_BIT_OTG_CTL_VBUS_VALID_ENA (1 << 0)

#define AB8540_BIT_OTG_CTL_ID_HOST_ENA (1 << 1)

#define AB8540_BIT_OTG_CTL_ID_DEV_ENA (1 << 5)

#define AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA (1 << 0)


#define AB8500_WD_KICK_DELAY_US 100 
/* usec */

#define AB8500_WD_V11_DISABLE_DELAY_US 100 
/* usec */

#define AB8500_V20_31952_DISABLE_DELAY_US 100 
/* usec */

/* Usb line status register */

enum ab8500_usb_link_status {
	
USB_LINK_NOT_CONFIGURED_8500 = 0,
	
USB_LINK_STD_HOST_NC_8500,
	
USB_LINK_STD_HOST_C_NS_8500,
	
USB_LINK_STD_HOST_C_S_8500,
	
USB_LINK_HOST_CHG_NM_8500,
	
USB_LINK_HOST_CHG_HS_8500,
	
USB_LINK_HOST_CHG_HS_CHIRP_8500,
	
USB_LINK_DEDICATED_CHG_8500,
	
USB_LINK_ACA_RID_A_8500,
	
USB_LINK_ACA_RID_B_8500,
	
USB_LINK_ACA_RID_C_NM_8500,
	
USB_LINK_ACA_RID_C_HS_8500,
	
USB_LINK_ACA_RID_C_HS_CHIRP_8500,
	
USB_LINK_HM_IDGND_8500,
	
USB_LINK_RESERVED_8500,
	
USB_LINK_NOT_VALID_LINK_8500,
};


enum ab8505_usb_link_status {
	
USB_LINK_NOT_CONFIGURED_8505 = 0,
	
USB_LINK_STD_HOST_NC_8505,
	
USB_LINK_STD_HOST_C_NS_8505,
	
USB_LINK_STD_HOST_C_S_8505,
	
USB_LINK_CDP_8505,
	
USB_LINK_RESERVED0_8505,
	
USB_LINK_RESERVED1_8505,
	
USB_LINK_DEDICATED_CHG_8505,
	
USB_LINK_ACA_RID_A_8505,
	
USB_LINK_ACA_RID_B_8505,
	
USB_LINK_ACA_RID_C_NM_8505,
	
USB_LINK_RESERVED2_8505,
	
USB_LINK_RESERVED3_8505,
	
USB_LINK_HM_IDGND_8505,
	
USB_LINK_CHARGERPORT_NOT_OK_8505,
	
USB_LINK_CHARGER_DM_HIGH_8505,
	
USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505,
	
USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505,
	
USB_LINK_STD_UPSTREAM_8505,
	
USB_LINK_CHARGER_SE1_8505,
	
USB_LINK_CARKIT_CHGR_1_8505,
	
USB_LINK_CARKIT_CHGR_2_8505,
	
USB_LINK_ACA_DOCK_CHGR_8505,
	
USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505,
	
USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505,
	
USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505,
	
USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505,
	
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505,
};


enum ab8540_usb_link_status {
	
USB_LINK_NOT_CONFIGURED_8540 = 0,
	
USB_LINK_STD_HOST_NC_8540,
	
USB_LINK_STD_HOST_C_NS_8540,
	
USB_LINK_STD_HOST_C_S_8540,
	
USB_LINK_CDP_8540,
	
USB_LINK_RESERVED0_8540,
	
USB_LINK_RESERVED1_8540,
	
USB_LINK_DEDICATED_CHG_8540,
	
USB_LINK_ACA_RID_A_8540,
	
USB_LINK_ACA_RID_B_8540,
	
USB_LINK_ACA_RID_C_NM_8540,
	
USB_LINK_RESERVED2_8540,
	
USB_LINK_RESERVED3_8540,
	
USB_LINK_HM_IDGND_8540,
	
USB_LINK_CHARGERPORT_NOT_OK_8540,
	
USB_LINK_CHARGER_DM_HIGH_8540,
	
USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540,
	
USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540,
	
USB_LINK_STD_UPSTREAM_8540,
	
USB_LINK_CHARGER_SE1_8540,
	
USB_LINK_CARKIT_CHGR_1_8540,
	
USB_LINK_CARKIT_CHGR_2_8540,
	
USB_LINK_ACA_DOCK_CHGR_8540,
	
USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8540,
	
USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8540,
	
USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8540,
	
USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8540,
	
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8540
};


enum ab9540_usb_link_status {
	
USB_LINK_NOT_CONFIGURED_9540 = 0,
	
USB_LINK_STD_HOST_NC_9540,
	
USB_LINK_STD_HOST_C_NS_9540,
	
USB_LINK_STD_HOST_C_S_9540,
	
USB_LINK_CDP_9540,
	
USB_LINK_RESERVED0_9540,
	
USB_LINK_RESERVED1_9540,
	
USB_LINK_DEDICATED_CHG_9540,
	
USB_LINK_ACA_RID_A_9540,
	
USB_LINK_ACA_RID_B_9540,
	
USB_LINK_ACA_RID_C_NM_9540,
	
USB_LINK_RESERVED2_9540,
	
USB_LINK_RESERVED3_9540,
	
USB_LINK_HM_IDGND_9540,
	
USB_LINK_CHARGERPORT_NOT_OK_9540,
	
USB_LINK_CHARGER_DM_HIGH_9540,
	
USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540,
	
USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540,
	
USB_LINK_STD_UPSTREAM_9540,
	
USB_LINK_CHARGER_SE1_9540,
	
USB_LINK_CARKIT_CHGR_1_9540,
	
USB_LINK_CARKIT_CHGR_2_9540,
	
USB_LINK_ACA_DOCK_CHGR_9540,
	
USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_9540,
	
USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_9540,
	
USB_LINK_SAMSUNG_UART_CBL_PHY_EN_9540,
	
USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_9540,
	
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_9540
};


enum ab8500_usb_mode {
	
USB_IDLE = 0,
	
USB_PERIPHERAL,
	
USB_HOST,
	
USB_DEDICATED_CHG
};

/* Register USB_LINK_STATUS interrupt */

#define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ	(1 << 0)
/* Register ID_WAKEUP_F interrupt */

#define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ	(1 << 1)
/* Register VBUS_DET_F interrupt */

#define AB8500_USB_FLAG_USE_VBUS_DET_IRQ	(1 << 2)
/* Driver is using the ab-iddet driver*/

#define AB8500_USB_FLAG_USE_AB_IDDET		(1 << 3)
/* Enable setting regulators voltage */

#define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE	(1 << 4)
/* Enable the check_vbus_status workaround */

#define AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS	(1 << 5)
/* Enable the vbus host workaround */

#define AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK	(1 << 6)


struct ab8500_usb {
	
struct usb_phy phy;
	
struct device *dev;
	
struct ab8500 *ab8500;
	
unsigned vbus_draw;
	
struct work_struct phy_dis_work;
	
struct work_struct vbus_event_work;
	
enum ab8500_usb_mode mode;
	
struct clk *sysclk;
	
struct regulator *v_ape;
	
struct regulator *v_musb;
	
struct regulator *v_ulpi;
	
int saved_v_ulpi;
	
int previous_link_status_state;
	
struct pinctrl *pinctrl;
	
struct pinctrl_state *pins_sleep;
	
bool enabled_charging_detection;
	
unsigned int flags;
};



static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
{
	return container_of(x, struct ab8500_usb, phy);
}

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static void ab8500_usb_wd_workaround(struct ab8500_usb *ab)
{
	abx500_set_register_interruptible(ab->dev,
		AB8500_SYS_CTRL2_BLOCK,
		AB8500_MAIN_WD_CTRL_REG,
		AB8500_BIT_WD_CTRL_ENABLE);

	udelay(AB8500_WD_KICK_DELAY_US);

	abx500_set_register_interruptible(ab->dev,
		AB8500_SYS_CTRL2_BLOCK,
		AB8500_MAIN_WD_CTRL_REG,
		(AB8500_BIT_WD_CTRL_ENABLE
		| AB8500_BIT_WD_CTRL_KICK));

	udelay(AB8500_WD_V11_DISABLE_DELAY_US);

	abx500_set_register_interruptible(ab->dev,
		AB8500_SYS_CTRL2_BLOCK,
		AB8500_MAIN_WD_CTRL_REG,
		0);
}

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static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
{
	int ret, volt;

	ret = regulator_enable(ab->v_ape);
	if (ret)
		dev_err(ab->dev, "Failed to enable v-ape\n");

	if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
		ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi);
		if (ab->saved_v_ulpi < 0)
			dev_err(ab->dev, "Failed to get v_ulpi voltage\n");

		ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000);
		if (ret < 0)
			dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n",
					ret);

		ret = regulator_set_load(ab->v_ulpi, 28000);
		if (ret < 0)
			dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
					ret);
	}

	ret = regulator_enable(ab->v_ulpi);
	if (ret)
		dev_err(ab->dev, "Failed to enable vddulpivio18\n");

	if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
		volt = regulator_get_voltage(ab->v_ulpi);
		if ((volt != 1300000) && (volt != 1350000))
			dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n",
					volt);
	}

	ret = regulator_enable(ab->v_musb);
	if (ret)
		dev_err(ab->dev, "Failed to enable musb_1v8\n");
}

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static void ab8500_usb_regulator_disable(struct ab8500_usb *ab)
{
	int ret;

	regulator_disable(ab->v_musb);

	regulator_disable(ab->v_ulpi);

	/* USB is not the only consumer of Vintcore, restore old settings */
	if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
		if (ab->saved_v_ulpi > 0) {
			ret = regulator_set_voltage(ab->v_ulpi,
					ab->saved_v_ulpi, ab->saved_v_ulpi);
			if (ret < 0)
				dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n",
						ab->saved_v_ulpi, ret);
		}

		ret = regulator_set_load(ab->v_ulpi, 0);
		if (ret < 0)
			dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
					ret);
	}

	regulator_disable(ab->v_ape);
}

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static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit)
{
	/* Workaround for v2.0 bug # 31952 */
	if (is_ab8500_2p0(ab->ab8500)) {
		abx500_mask_and_set_register_interruptible(ab->dev,
				AB8500_USB, AB8500_USB_PHY_CTRL_REG,
				bit, bit);
		udelay(AB8500_V20_31952_DISABLE_DELAY_US);
	}
}

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static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host)
{
	u8 bit;
	bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
		AB8500_BIT_PHY_CTRL_DEVICE_EN;

	/* mux and configure USB pins to DEFAULT state */
	ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT);
	if (IS_ERR(ab->pinctrl))
		dev_err(ab->dev, "could not get/set default pinstate\n");

	if (clk_prepare_enable(ab->sysclk))
		dev_err(ab->dev, "can't prepare/enable clock\n");

	ab8500_usb_regulator_enable(ab);

	abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_USB, AB8500_USB_PHY_CTRL_REG,
			bit, bit);

	if (ab->flags & AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK) {
		if (sel_host)
			abx500_set_register_interruptible(ab->dev,
					AB8500_USB, AB8540_USB_OTG_CTL_REG,
					AB8540_BIT_OTG_CTL_VBUS_VALID_ENA |
					AB8540_BIT_OTG_CTL_ID_HOST_ENA |
					AB8540_BIT_OTG_CTL_ID_DEV_ENA);
	}
}

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static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
{
	u8 bit;
	bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
		AB8500_BIT_PHY_CTRL_DEVICE_EN;

	ab8500_usb_wd_linkstatus(ab, bit);

	abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_USB, AB8500_USB_PHY_CTRL_REG,
			bit, 0);

	/* Needed to disable the phy.*/
	ab8500_usb_wd_workaround(ab);

	clk_disable_unprepare(ab->sysclk);

	ab8500_usb_regulator_disable(ab);

	if (!IS_ERR(ab->pinctrl)) {
		/* configure USB pins to SLEEP state */
		ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl,
				PINCTRL_STATE_SLEEP);

		if (IS_ERR(ab->pins_sleep))
			dev_dbg(ab->dev, "could not get sleep pinstate\n");
		else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep))
			dev_err(ab->dev, "could not set pins to sleep state\n");

		/*
                 * as USB pins are shared with iddet, release them to allow
                 * iddet to request them
                 */
		pinctrl_put(ab->pinctrl);
	}
}

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#define ab8500_usb_host_phy_en(ab)	ab8500_usb_phy_enable(ab, true)

#define ab8500_usb_host_phy_dis(ab)	ab8500_usb_phy_disable(ab, true)

#define ab8500_usb_peri_phy_en(ab)	ab8500_usb_phy_enable(ab, false)

#define ab8500_usb_peri_phy_dis(ab)	ab8500_usb_phy_disable(ab, false)



static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
		enum ab9540_usb_link_status lsts)
{
	enum ux500_musb_vbus_id_status event = 0;

	dev_dbg(ab->dev, "ab9540_usb_link_status_update %d\n", lsts);

	if (ab->previous_link_status_state == USB_LINK_HM_IDGND_9540 &&
			(lsts == USB_LINK_STD_HOST_C_NS_9540 ||
			 lsts == USB_LINK_STD_HOST_NC_9540))
		return 0;

	if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_9540 &&
			(lsts == USB_LINK_STD_HOST_NC_9540))
		return 0;

	ab->previous_link_status_state = lsts;

	switch (lsts) {
	case USB_LINK_ACA_RID_B_9540:
		event = UX500_MUSB_RIDB;
	case USB_LINK_NOT_CONFIGURED_9540:
	case USB_LINK_RESERVED0_9540:
	case USB_LINK_RESERVED1_9540:
	case USB_LINK_RESERVED2_9540:
	case USB_LINK_RESERVED3_9540:
		if (ab->mode == USB_PERIPHERAL)
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_CLEAN, &ab->vbus_draw);
		ab->mode = USB_IDLE;
		ab->phy.otg->default_a = false;
		ab->vbus_draw = 0;
		if (event != UX500_MUSB_RIDB)
			event = UX500_MUSB_NONE;
		/* Fallback to default B_IDLE as nothing is connected. */
		ab->phy.otg->state = OTG_STATE_B_IDLE;
		usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
		break;

	case USB_LINK_ACA_RID_C_NM_9540:
		event = UX500_MUSB_RIDC;
	case USB_LINK_STD_HOST_NC_9540:
	case USB_LINK_STD_HOST_C_NS_9540:
	case USB_LINK_STD_HOST_C_S_9540:
	case USB_LINK_CDP_9540:
		if (ab->mode == USB_HOST) {
			ab->mode = USB_PERIPHERAL;
			ab8500_usb_host_phy_dis(ab);
			ab8500_usb_peri_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
			usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
		}
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_PERIPHERAL;
			ab8500_usb_peri_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
			usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
		}
		if (event != UX500_MUSB_RIDC)
			event = UX500_MUSB_VBUS;
		break;

	case USB_LINK_ACA_RID_A_9540:
		event = UX500_MUSB_RIDA;
	case USB_LINK_HM_IDGND_9540:
	case USB_LINK_STD_UPSTREAM_9540:
		if (ab->mode == USB_PERIPHERAL) {
			ab->mode = USB_HOST;
			ab8500_usb_peri_phy_dis(ab);
			ab8500_usb_host_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
		}
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_HOST;
			ab8500_usb_host_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
		}
		ab->phy.otg->default_a = true;
		if (event != UX500_MUSB_RIDA)
			event = UX500_MUSB_ID;

		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		break;

	case USB_LINK_DEDICATED_CHG_9540:
		ab->mode = USB_DEDICATED_CHG;
		event = UX500_MUSB_CHARGER;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
		break;

	case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540:
	case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540:
		if (!(is_ab9540_2p0_or_earlier(ab->ab8500))) {
			event = UX500_MUSB_NONE;
			if (ab->mode == USB_HOST) {
				ab->phy.otg->default_a = false;
				ab->vbus_draw = 0;
				atomic_notifier_call_chain(&ab->phy.notifier,
						event, &ab->vbus_draw);
				ab8500_usb_host_phy_dis(ab);
				ab->mode = USB_IDLE;
			}
			if (ab->mode == USB_PERIPHERAL) {
				atomic_notifier_call_chain(&ab->phy.notifier,
						event, &ab->vbus_draw);
				ab8500_usb_peri_phy_dis(ab);
				atomic_notifier_call_chain(&ab->phy.notifier,
						UX500_MUSB_CLEAN,
						&ab->vbus_draw);
				ab->mode = USB_IDLE;
				ab->phy.otg->default_a = false;
				ab->vbus_draw = 0;
				usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
			}
		}
		break;

	default:
		break;
	}

	return 0;
}

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fabio baltieri
476
73.01%
3
42.86%
mian yousaf kaukab
mian yousaf kaukab
115
17.64%
1
14.29%
kiran raparthy
kiran raparthy
50
7.67%
1
14.29%
heikki krogerus
heikki krogerus
9
1.38%
1
14.29%
antoine tenart
antoine tenart
2
0.31%
1
14.29%
Total
652
100.00%
7
100.00%



static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
		enum ab8540_usb_link_status lsts)
{
	enum ux500_musb_vbus_id_status event = 0;

	dev_dbg(ab->dev, "ab8540_usb_link_status_update %d\n", lsts);

	if (ab->enabled_charging_detection) {
		/* Disable USB Charger detection */
		abx500_mask_and_set_register_interruptible(ab->dev,
				AB8500_USB, AB8540_VBUS_CTRL_REG,
				AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA, 0x00);
		ab->enabled_charging_detection = false;
	}

	/*
         * Spurious link_status interrupts are seen in case of a
         * disconnection of a device in IDGND and RIDA stage
         */
	if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8540 &&
			(lsts == USB_LINK_STD_HOST_C_NS_8540 ||
			 lsts == USB_LINK_STD_HOST_NC_8540))
		return 0;

	if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8540 &&
			(lsts == USB_LINK_STD_HOST_NC_8540))
		return 0;

	ab->previous_link_status_state = lsts;

	switch (lsts) {
	case USB_LINK_ACA_RID_B_8540:
		event = UX500_MUSB_RIDB;
	case USB_LINK_NOT_CONFIGURED_8540:
	case USB_LINK_RESERVED0_8540:
	case USB_LINK_RESERVED1_8540:
	case USB_LINK_RESERVED2_8540:
	case USB_LINK_RESERVED3_8540:
		ab->mode = USB_IDLE;
		ab->phy.otg->default_a = false;
		ab->vbus_draw = 0;
		if (event != UX500_MUSB_RIDB)
			event = UX500_MUSB_NONE;
		/*
                 * Fallback to default B_IDLE as nothing
                 * is connected
                 */
		ab->phy.otg->state = OTG_STATE_B_IDLE;
		usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
		break;

	case USB_LINK_ACA_RID_C_NM_8540:
		event = UX500_MUSB_RIDC;
	case USB_LINK_STD_HOST_NC_8540:
	case USB_LINK_STD_HOST_C_NS_8540:
	case USB_LINK_STD_HOST_C_S_8540:
	case USB_LINK_CDP_8540:
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_PERIPHERAL;
			ab8500_usb_peri_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
			usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
		}
		if (event != UX500_MUSB_RIDC)
			event = UX500_MUSB_VBUS;
		break;

	case USB_LINK_ACA_RID_A_8540:
	case USB_LINK_ACA_DOCK_CHGR_8540:
		event = UX500_MUSB_RIDA;
	case USB_LINK_HM_IDGND_8540:
	case USB_LINK_STD_UPSTREAM_8540:
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_HOST;
			ab8500_usb_host_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
		}
		ab->phy.otg->default_a = true;
		if (event != UX500_MUSB_RIDA)
			event = UX500_MUSB_ID;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		break;

	case USB_LINK_DEDICATED_CHG_8540:
		ab->mode = USB_DEDICATED_CHG;
		event = UX500_MUSB_CHARGER;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
		break;

	case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540:
	case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540:
		event = UX500_MUSB_NONE;
		if (ab->mode == USB_HOST) {
			ab->phy.otg->default_a = false;
			ab->vbus_draw = 0;
			atomic_notifier_call_chain(&ab->phy.notifier,
					event, &ab->vbus_draw);
			ab8500_usb_host_phy_dis(ab);
			ab->mode = USB_IDLE;
		}
		if (ab->mode == USB_PERIPHERAL) {
			atomic_notifier_call_chain(&ab->phy.notifier,
					event, &ab->vbus_draw);
			ab8500_usb_peri_phy_dis(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_CLEAN, &ab->vbus_draw);
			ab->mode = USB_IDLE;
			ab->phy.otg->default_a = false;
			ab->vbus_draw = 0;
		usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
		}
		break;

	default:
		event = UX500_MUSB_NONE;
		break;
	}

	return 0;
}

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kiran raparthy
40
7.21%
1
25.00%
antoine tenart
antoine tenart
2
0.36%
1
25.00%
Total
555
100.00%
4
100.00%



static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
		enum ab8505_usb_link_status lsts)
{
	enum ux500_musb_vbus_id_status event = 0;

	dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts);

	/*
         * Spurious link_status interrupts are seen at the time of
         * disconnection of a device in RIDA state
         */
	if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 &&
			(lsts == USB_LINK_STD_HOST_NC_8505))
		return 0;

	ab->previous_link_status_state = lsts;

	switch (lsts) {
	case USB_LINK_ACA_RID_B_8505:
		event = UX500_MUSB_RIDB;
	case USB_LINK_NOT_CONFIGURED_8505:
	case USB_LINK_RESERVED0_8505:
	case USB_LINK_RESERVED1_8505:
	case USB_LINK_RESERVED2_8505:
	case USB_LINK_RESERVED3_8505:
		ab->mode = USB_IDLE;
		ab->phy.otg->default_a = false;
		ab->vbus_draw = 0;
		if (event != UX500_MUSB_RIDB)
			event = UX500_MUSB_NONE;
		/*
                 * Fallback to default B_IDLE as nothing
                 * is connected
                 */
		ab->phy.otg->state = OTG_STATE_B_IDLE;
		usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
		break;

	case USB_LINK_ACA_RID_C_NM_8505:
		event = UX500_MUSB_RIDC;
	case USB_LINK_STD_HOST_NC_8505:
	case USB_LINK_STD_HOST_C_NS_8505:
	case USB_LINK_STD_HOST_C_S_8505:
	case USB_LINK_CDP_8505:
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_PERIPHERAL;
			ab8500_usb_peri_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
			usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
		}
		if (event != UX500_MUSB_RIDC)
			event = UX500_MUSB_VBUS;
		break;

	case USB_LINK_ACA_RID_A_8505:
	case USB_LINK_ACA_DOCK_CHGR_8505:
		event = UX500_MUSB_RIDA;
	case USB_LINK_HM_IDGND_8505:
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_HOST;
			ab8500_usb_host_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
		}
		ab->phy.otg->default_a = true;
		if (event != UX500_MUSB_RIDA)
			event = UX500_MUSB_ID;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		break;

	case USB_LINK_DEDICATED_CHG_8505:
		ab->mode = USB_DEDICATED_CHG;
		event = UX500_MUSB_CHARGER;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
		break;

	default:
		break;
	}

	return 0;
}

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8.55%
1
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2
0.57%
1
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Total
351
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4
100.00%



static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
		enum ab8500_usb_link_status lsts)
{
	enum ux500_musb_vbus_id_status event = 0;

	dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts);

	/*
         * Spurious link_status interrupts are seen in case of a
         * disconnection of a device in IDGND and RIDA stage
         */
	if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 &&
			(lsts == USB_LINK_STD_HOST_C_NS_8500 ||
			 lsts == USB_LINK_STD_HOST_NC_8500))
		return 0;

	if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 &&
			lsts == USB_LINK_STD_HOST_NC_8500)
		return 0;

	ab->previous_link_status_state = lsts;

	switch (lsts) {
	case USB_LINK_ACA_RID_B_8500:
		event = UX500_MUSB_RIDB;
	case USB_LINK_NOT_CONFIGURED_8500:
	case USB_LINK_NOT_VALID_LINK_8500:
		ab->mode = USB_IDLE;
		ab->phy.otg->default_a = false;
		ab->vbus_draw = 0;
		if (event != UX500_MUSB_RIDB)
			event = UX500_MUSB_NONE;
		/* Fallback to default B_IDLE as nothing is connected */
		ab->phy.otg->state = OTG_STATE_B_IDLE;
		usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
		break;

	case USB_LINK_ACA_RID_C_NM_8500:
	case USB_LINK_ACA_RID_C_HS_8500:
	case USB_LINK_ACA_RID_C_HS_CHIRP_8500:
		event = UX500_MUSB_RIDC;
	case USB_LINK_STD_HOST_NC_8500:
	case USB_LINK_STD_HOST_C_NS_8500:
	case USB_LINK_STD_HOST_C_S_8500:
	case USB_LINK_HOST_CHG_NM_8500:
	case USB_LINK_HOST_CHG_HS_8500:
	case USB_LINK_HOST_CHG_HS_CHIRP_8500:
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_PERIPHERAL;
			ab8500_usb_peri_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
			usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
		}
		if (event != UX500_MUSB_RIDC)
			event = UX500_MUSB_VBUS;
		break;

	case USB_LINK_ACA_RID_A_8500:
		event = UX500_MUSB_RIDA;
	case USB_LINK_HM_IDGND_8500:
		if (ab->mode == USB_IDLE) {
			ab->mode = USB_HOST;
			ab8500_usb_host_phy_en(ab);
			atomic_notifier_call_chain(&ab->phy.notifier,
					UX500_MUSB_PREPARE, &ab->vbus_draw);
		}
		ab->phy.otg->default_a = true;
		if (event != UX500_MUSB_RIDA)
			event = UX500_MUSB_ID;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		break;

	case USB_LINK_DEDICATED_CHG_8500:
		ab->mode = USB_DEDICATED_CHG;
		event = UX500_MUSB_CHARGER;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
		break;

	case USB_LINK_RESERVED_8500:
		break;
	}

	return 0;
}

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kiran raparthy
30
8.06%
1
14.29%
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mian yousaf kaukab
23
6.18%
1
14.29%
antoine tenart
antoine tenart
2
0.54%
1
14.29%
heikki krogerus
heikki krogerus
1
0.27%
1
14.29%
felipe balbi
felipe balbi
1
0.27%
1
14.29%
Total
372
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7
100.00%

/*
 * Connection Sequence:
 *   1. Link Status Interrupt
 *   2. Enable AB clock
 *   3. Enable AB regulators
 *   4. Enable USB phy
 *   5. Reset the musb controller
 *   6. Switch the ULPI GPIO pins to fucntion mode
 *   7. Enable the musb Peripheral5 clock
 *   8. Restore MUSB context
 */


static int abx500_usb_link_status_update(struct ab8500_usb *ab)
{
	u8 reg;
	int ret = 0;

	if (is_ab8500(ab->ab8500)) {
		enum ab8500_usb_link_status lsts;

		abx500_get_register_interruptible(ab->dev,
				AB8500_USB, AB8500_USB_LINE_STAT_REG, &reg);
		lsts = (reg >> 3) & 0x0F;
		ret = ab8500_usb_link_status_update(ab, lsts);
	} else if (is_ab8505(ab->ab8500)) {
		enum ab8505_usb_link_status lsts;

		abx500_get_register_interruptible(ab->dev,
				AB8500_USB, AB8505_USB_LINE_STAT_REG, &reg);
		lsts = (reg >> 3) & 0x1F;
		ret = ab8505_usb_link_status_update(ab, lsts);
	} else if (is_ab8540(ab->ab8500)) {
		enum ab8540_usb_link_status lsts;

		abx500_get_register_interruptible(ab->dev,
				AB8500_USB, AB8540_USB_LINK_STAT_REG, &reg);
		lsts = (reg >> 3) & 0xFF;
		ret = ab8540_usb_link_status_update(ab, lsts);
	} else if (is_ab9540(ab->ab8500)) {
		enum ab9540_usb_link_status lsts;

		abx500_get_register_interruptible(ab->dev,
				AB8500_USB, AB9540_USB_LINK_STAT_REG, &reg);
		lsts = (reg >> 3) & 0xFF;
		ret = ab9540_usb_link_status_update(ab, lsts);
	}

	return ret;
}

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/*
 * Disconnection Sequence:
 *   1. Disconnect Interrupt
 *   2. Disable regulators
 *   3. Disable AB clock
 *   4. Disable the Phy
 *   5. Link Status Interrupt
 *   6. Disable Musb Clock
 */


static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data)
{
	struct ab8500_usb *ab = (struct ab8500_usb *) data;
	enum usb_phy_events event = UX500_MUSB_NONE;

	/* Link status will not be updated till phy is disabled. */
	if (ab->mode == USB_HOST) {
		ab->phy.otg->default_a = false;
		ab->vbus_draw = 0;
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		ab8500_usb_host_phy_dis(ab);
		ab->mode = USB_IDLE;
	}

	if (ab->mode == USB_PERIPHERAL) {
		atomic_notifier_call_chain(&ab->phy.notifier,
				event, &ab->vbus_draw);
		ab8500_usb_peri_phy_dis(ab);
		atomic_notifier_call_chain(&ab->phy.notifier,
				UX500_MUSB_CLEAN, &ab->vbus_draw);
		ab->mode = USB_IDLE;
		ab->phy.otg->default_a = false;
		ab->vbus_draw = 0;
	}

	if (is_ab8500_2p0(ab->ab8500)) {
		if (ab->mode == USB_DEDICATED_CHG) {
			ab8500_usb_wd_linkstatus(ab,
					AB8500_BIT_PHY_CTRL_DEVICE_EN);
			abx500_mask_and_set_register_interruptible(ab->dev,
					AB8500_USB, AB8500_USB_PHY_CTRL_REG,
					AB8500_BIT_PHY_CTRL_DEVICE_EN, 0);
		}
	}

	return IRQ_HANDLED;
}

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50.00%
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2
100.00%



static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data)
{
	struct ab8500_usb *ab = (struct ab8500_usb *)data;

	abx500_usb_link_status_update(ab);

	return IRQ_HANDLED;
}

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static void ab8500_usb_phy_disable_work(struct work_struct *work)
{
	struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
						phy_dis_work);

	if (!ab->phy.otg->host)
		ab8500_usb_host_phy_dis(ab);

	if (!ab->phy.otg->gadget)
		ab8500_usb_peri_phy_dis(ab);
}

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50.00%
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58
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2
100.00%

/* Check if VBUS is set and linkstatus has not detected a cable. */


static bool ab8500_usb_check_vbus_status(struct ab8500_usb *ab)
{
	u8 isource2;
	u8 reg;
	enum ab8540_usb_link_status lsts;

	abx500_get_register_interruptible(ab->dev,
			AB8500_INTERRUPT, AB8500_IT_SOURCE2_REG,
			&isource2);

	/* If Vbus is below 3.6V abort */
	if (!(isource2 & AB8500_BIT_SOURCE2_VBUSDET))
		return false;

	abx500_get_register_interruptible(ab->dev,
			AB8500_USB, AB8540_USB_LINK_STAT_REG,
			&reg);

	lsts = (reg >> 3) & 0xFF;

	/* Check if linkstatus has detected a cable */
	if (lsts)
		return false;

	return true;
}

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/* re-trigger charger detection again with watchdog re-kick. */


static void ab8500_usb_vbus_turn_on_event_work(struct work_struct *work)
{
	struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
			vbus_event_work);

	if (ab->mode != USB_IDLE)
		return;

	abx500_set_register_interruptible(ab->dev,
			AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
			AB8500_BIT_WD_CTRL_ENABLE);

	udelay(100);

	abx500_set_register_interruptible(ab->dev,
			AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
			AB8500_BIT_WD_CTRL_ENABLE | AB8500_BIT_WD_CTRL_KICK);

	udelay(100);

	/* Disable Main watchdog */
	abx500_set_register_interruptible(ab->dev,
			AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
			0x0);

	/* Enable USB Charger detection */
	abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_USB, AB8540_VBUS_CTRL_REG,
			AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA,
			AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA);

	ab->enabled_charging_detection = true;
}

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static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)
{
	/*
         * AB8500 V2 has eye diagram issues when drawing more than 100mA from
         * VBUS.  Set charging current to 100mA in case of standard host
         */
	if (is_ab8500_2p0_or_earlier(ab->ab8500))
		if (mA > 100)
			mA = 100;

	return mA;
}

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100.00%
1
100.00%



static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
{
	struct ab8500_usb *ab;

	if (!phy)
		return -ENODEV;

	ab = phy_to_ab(phy);

	mA = ab8500_eyediagram_workaroud(ab, mA);

	ab->vbus_draw = mA;

	atomic_notifier_call_chain(&ab->phy.notifier,
			UX500_MUSB_VBUS, &ab->vbus_draw);

	return 0;
}

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mian yousaf kaukab
51
72.86%
1
16.67%
sakethram bommisetti
sakethram bommisetti
9
12.86%
1
16.67%
heikki krogerus
heikki krogerus
6
8.57%
2
33.33%
fabio baltieri
fabio baltieri
3
4.29%
1
16.67%
felipe balbi
felipe balbi
1
1.43%
1
16.67%
Total
70
100.00%
6
100.00%



static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
{
	/* TODO */
	return 0;
}

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mian yousaf kaukab
17
94.44%
1
50.00%
heikki krogerus
heikki krogerus
1
5.56%
1
50.00%
Total
18
100.00%
2
100.00%



static int ab8500_usb_set_peripheral(struct usb_otg *otg,
					struct usb_gadget *gadget)
{
	struct ab8500_usb *ab;

	if (!otg)
		return -ENODEV;

	ab = phy_to_ab(otg->usb_phy);

	ab->phy.otg->gadget = gadget;

	/* Some drivers call this function in atomic context.
         * Do not update ab8500 registers directly till this
         * is fixed.
         */

	if ((ab->mode != USB_IDLE) && !gadget) {
		ab->mode = USB_IDLE;
		schedule_work(&ab->phy_dis_work);
	}

	return 0;
}

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mian yousaf kaukab
56
68.29%
1
25.00%
sakethram bommisetti
sakethram bommisetti
21
25.61%
1
25.00%
heikki krogerus
heikki krogerus
4
4.88%
1
25.00%
antoine tenart
antoine tenart
1
1.22%
1
25.00%
Total
82
100.00%
4
100.00%



static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
{
	struct ab8500_usb *ab;

	if (!otg)
		return -ENODEV;

	ab = phy_to_ab(otg->usb_phy);

	ab->phy.otg->host = host;

	/* Some drivers call this function in atomic context.
         * Do not update ab8500 registers directly till this
         * is fixed.
         */

	if ((ab->mode != USB_IDLE) && !host) {
		ab->mode = USB_IDLE;
		schedule_work(&ab->phy_dis_work);
	}

	return 0;
}

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mian yousaf kaukab
56
68.29%
1
25.00%
sakethram bommisetti
sakethram bommisetti
21
25.61%
1
25.00%
heikki krogerus
heikki krogerus
4
4.88%
1
25.00%
antoine tenart
antoine tenart
1
1.22%
1
25.00%
Total
82
100.00%
4
100.00%



static void ab8500_usb_restart_phy(struct ab8500_usb *ab)
{
	abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_USB, AB8500_USB_PHY_CTRL_REG,
			AB8500_BIT_PHY_CTRL_DEVICE_EN,
			AB8500_BIT_PHY_CTRL_DEVICE_EN);

	udelay(100);

	abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_USB, AB8500_USB_PHY_CTRL_REG,
			AB8500_BIT_PHY_CTRL_DEVICE_EN,
			0);

	abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_USB, AB8500_USB_PHY_CTRL_REG,
			AB8500_BIT_PHY_CTRL_HOST_EN,
			AB8500_BIT_PHY_CTRL_HOST_EN);

	udelay(100);

	abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_USB, AB8500_USB_PHY_CTRL_REG,
			AB8500_BIT_PHY_CTRL_HOST_EN,
			0);
}

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1
100.00%
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81
100.00%
1
100.00%



static int ab8500_usb_regulator_get(struct ab8500_usb *ab)
{
	int err;

	ab->v_ape = devm_regulator_get(ab->dev, "v-ape");
	if (IS_ERR(ab->v_ape)) {
		dev_err(ab->dev, "Could not get v-ape supply\n");
		err = PTR_ERR(ab->v_ape);
		return err;
	}

	ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18");
	if (IS_ERR(ab->v_ulpi)) {
		dev_err(ab->dev, "Could not get vddulpivio18 supply\n");
		err = PTR_ERR(ab->v_ulpi);
		return err;
	}

	ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8");
	if (IS_ERR(ab->v_musb)) {
		dev_err(ab->dev, "Could not get musb_1v8 supply\n");
		err = PTR_ERR(ab->v_musb);
		return err;
	}

	return 0;
}

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static int ab8500_usb_irq_setup(struct platform_device *pdev,
		struct ab8500_usb *ab)
{
	int err;
	int irq;

	if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) {
		irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
		if (irq < 0) {
			dev_err(&pdev->dev, "Link status irq not found\n");
			return irq;
		}
		err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
				ab8500_usb_link_status_irq,
				IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
				"usb-link-status", ab);
		if (err < 0) {
			dev_err(ab->dev, "request_irq failed for link status irq\n");
			return err;
		}
	}

	if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) {
		irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
		if (irq < 0) {
			dev_err(&pdev->dev, "ID fall irq not found\n");
			return irq;
		}
		err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
				ab8500_usb_disconnect_irq,
				IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
				"usb-id-fall", ab);
		if (err < 0) {
			dev_err(ab->dev, "request_irq failed for ID fall irq\n");
			return err;
		}
	}

	if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) {
		irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
		if (irq < 0) {
			dev_err(&pdev->dev, "VBUS fall irq not found\n");
			return irq;
		}
		err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
				ab8500_usb_disconnect_irq,
				IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
				"usb-vbus-fall", ab);
		if (err < 0) {
			dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
			return err;
		}
	}

	return 0;
}

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fabio baltieri
200
70.67%
3
60.00%
mian yousaf kaukab
mian yousaf kaukab
77
27.21%
1
20.00%
fabio estevam
fabio estevam
6
2.12%
1
20.00%
Total
283
100.00%
5
100.00%



static void ab8500_usb_set_ab8500_tuning_values(struct ab8500_usb *ab)
{
	int err;

	/* Enable the PBT/Bank 0x12 access */
	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
	if (err < 0)
		dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
				err);

	/* Switch to normal mode/disable Bank 0x12 access */
	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
	if (err < 0)
		dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
				err);
}

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static void ab8500_usb_set_ab8505_tuning_values(struct ab8500_usb *ab)
{
	int err;

	/* Enable the PBT/Bank 0x12 access */
	err = abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
			0x01, 0x01);
	if (err < 0)
		dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
				err);

	err = abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE1,
			0xC8, 0xC8);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
				err);

	err = abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE2,
			0x60, 0x60);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
				err);

	err = abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE3,
			0xFC, 0x80);

	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
				err);

	/* Switch to normal mode/disable Bank 0x12 access */
	err = abx500_mask_and_set_register_interruptible(ab->dev,
			AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
			0x00, 0x00);
	if (err < 0)
		dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
				err);
}

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static void ab8500_usb_set_ab8540_tuning_values(struct ab8500_usb *ab)
{
	int err;

	err = abx500_set_register_interruptible(ab->dev,
			AB8540_DEBUG, AB8500_USB_PHY_TUNE1, 0xCC);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE1 register ret=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8540_DEBUG, AB8500_USB_PHY_TUNE2, 0x60);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE2 register ret=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8540_DEBUG, AB8500_USB_PHY_TUNE3, 0x90);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE3 regester ret=%d\n",
				err);
}

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static void ab8500_usb_set_ab9540_tuning_values(struct ab8500_usb *ab)
{
	int err;

	/* Enable the PBT/Bank 0x12 access */
	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
	if (err < 0)
		dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x60);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
				err);

	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x80);
	if (err < 0)
		dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
				err);

	/* Switch to normal mode/disable Bank 0x12 access */
	err = abx500_set_register_interruptible(ab->dev,
			AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
	if (err < 0)
		dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
				err);
}

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static int ab8500_usb_probe(struct platform_device *pdev)
{
	struct ab8500_usb	*ab;
	struct ab8500		*ab8500;
	struct usb_otg		*otg;
	int err;
	int rev;

	ab8500 = dev_get_drvdata(pdev->dev.parent);
	rev = abx500_get_chip_id(&pdev->dev);

	if (is_ab8500_1p1_or_earlier(ab8500)) {
		dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev);
		return -ENODEV;
	}

	ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL);
	if (!ab)
		return -ENOMEM;

	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
	if (!otg)
		return -ENOMEM;

	ab->dev			= &pdev->dev;
	ab->ab8500		= ab8500;
	ab->phy.dev		= ab->dev;
	ab->phy.otg		= otg;
	ab->phy.label		= "ab8500";
	ab->phy.set_suspend	= ab8500_usb_set_suspend;
	ab->phy.set_power	= ab8500_usb_set_power;
	ab->phy.otg->state	= OTG_STATE_UNDEFINED;

	otg->usb_phy		= &ab->phy;
	otg->set_host		= ab8500_usb_set_host;
	otg->set_peripheral	= ab8500_usb_set_peripheral;

	if (is_ab8500(ab->ab8500)) {
		ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
			AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
			AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
			AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
	} else if (is_ab8505(ab->ab8500)) {
		ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
			AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
			AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
			AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
	} else if (is_ab8540(ab->ab8500)) {
		ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
			AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS |
			AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK |
			AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
	} else if (is_ab9540(ab->ab8500)) {
		ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
			AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
		if (is_ab9540_2p0_or_earlier(ab->ab8500))
			ab->flags |= AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
				AB8500_USB_FLAG_USE_VBUS_DET_IRQ;
	}

	/* Disable regulator voltage setting for AB8500 <= v2.0 */
	if (is_ab8500_2p0_or_earlier(ab->ab8500))
		ab->flags &= ~AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;

	platform_set_drvdata(pdev, ab);

	/* all: Disable phy when called from set_host and set_peripheral */
	INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work);

	INIT_WORK(&ab->vbus_event_work, ab8500_usb_vbus_turn_on_event_work);

	err = ab8500_usb_regulator_get(ab);
	if (err)
		return err;

	ab->sysclk = devm_clk_get(ab->dev, "sysclk");
	if (IS_ERR(ab->sysclk)) {
		dev_err(ab->dev, "Could not get sysclk.\n");
		return PTR_ERR(ab->sysclk);
	}

	err = ab8500_usb_irq_setup(pdev, ab);
	if (err < 0)
		return err;

	err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
	if (err) {
		dev_err(&pdev->dev, "Can't register transceiver\n");
		return err;
	}

	if (is_ab8500(ab->ab8500) && !is_ab8500_2p0_or_earlier(ab->ab8500))
		/* Phy tuning values for AB8500 > v2.0 */
		ab8500_usb_set_ab8500_tuning_values(ab);
	else if (is_ab8505(ab->ab8500))
		/* Phy tuning values for AB8505 */
		ab8500_usb_set_ab8505_tuning_values(ab);
	else if (is_ab8540(ab->ab8500))
		/* Phy tuning values for AB8540 */
		ab8500_usb_set_ab8540_tuning_values(ab);
	else if (is_ab9540(ab->ab8500))
		/* Phy tuning values for AB9540 */
		ab8500_usb_set_ab9540_tuning_values(ab);

	/* Needed to enable ID detection. */
	ab8500_usb_wd_workaround(ab);

	/*
         * This is required for usb-link-status to work properly when a
         * cable is connected at boot time.
         */
	ab8500_usb_restart_phy(ab);

	if (ab->flags & AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS) {
		if (ab8500_usb_check_vbus_status(ab))
			schedule_work(&ab->vbus_event_work);
	}

	abx500_usb_link_status_update(ab);

	dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev);

	return 0;
}

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114
18.84%
3
21.43%
mian yousaf kaukab
mian yousaf kaukab
103
17.02%
1
7.14%
heikki krogerus
heikki krogerus
47
7.77%
1
7.14%
antoine tenart
antoine tenart
3
0.50%
2
14.29%
Total
605
100.00%
14
100.00%



static int ab8500_usb_remove(struct platform_device *pdev)
{
	struct ab8500_usb *ab = platform_get_drvdata(pdev);

	cancel_work_sync(&ab->phy_dis_work);
	cancel_work_sync(&ab->vbus_event_work);

	usb_remove_phy(&ab->phy);

	if (ab->mode == USB_HOST)
		ab8500_usb_host_phy_dis(ab);
	else if (ab->mode == USB_PERIPHERAL)
		ab8500_usb_peri_phy_dis(ab);

	return 0;
}

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8
10.67%
1
25.00%
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kishon vijay abraham i
5
6.67%
1
25.00%
Total
75
100.00%
4
100.00%


static const struct platform_device_id ab8500_usb_devtype[] = {
	{ .name = "ab8500-usb", },
	{ .name = "ab8540-usb", },
	{ .name = "ab9540-usb", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype);


static struct platform_driver ab8500_usb_driver = {
	.probe		= ab8500_usb_probe,
	.remove		= ab8500_usb_remove,
	.id_table	= ab8500_usb_devtype,
	.driver		= {
		.name	= "abx5x0-usb",
        },
};



static int __init ab8500_usb_init(void)
{
	return platform_driver_register(&ab8500_usb_driver);
}
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subsys_initcall(ab8500_usb_init);



static void __exit ab8500_usb_exit(void)
{
	platform_driver_unregister(&ab8500_usb_driver);
}
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module_exit(ab8500_usb_exit);

MODULE_AUTHOR("ST-Ericsson AB");
MODULE_DESCRIPTION("AB8500 family usb transceiver driver");
MODULE_LICENSE("GPL");
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4490
72.63%
14
38.89%
mian yousaf kaukab
mian yousaf kaukab
1010
16.34%
3
8.33%
sakethram bommisetti
sakethram bommisetti
303
4.90%
5
13.89%
kiran raparthy
kiran raparthy
150
2.43%
1
2.78%
patrice chotard
patrice chotard
119
1.92%
1
2.78%
heikki krogerus
heikki krogerus
78
1.26%
2
5.56%
antoine tenart
antoine tenart
13
0.21%
2
5.56%
fabio estevam
fabio estevam
6
0.10%
1
2.78%
kishon vijay abraham i
kishon vijay abraham i
5
0.08%
1
2.78%
bjorn andersson
bjorn andersson
2
0.03%
1
2.78%
felipe balbi
felipe balbi
2
0.03%
1
2.78%
linus walleij
linus walleij
1
0.02%
1
2.78%
mickael maison
mickael maison
1
0.02%
1
2.78%
sergei shtylyov
sergei shtylyov
1
0.02%
1
2.78%
krzysztof kozlowski
krzysztof kozlowski
1
0.02%
1
2.78%
Total
6182
100.00%
36
100.00%
  
Directory: drivers/usb/phy

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