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Commit f85bff5d authored by Fabio Baltieri's avatar Fabio Baltieri Committed by Felipe Balbi
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usb: phy: ab8500-usb: add ab9540 support 



Add support for the ab9540 variant of the ab8500 family.

Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Acked-by: default avatarMaxime Coquelin <maxime.coquelin@st.com>
Cc: Avinash Kumar <avinash.kumar@stericsson.com>
Cc: Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com>
Signed-off-by: default avatarFabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 0c380c0e

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

+213 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
 * 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
@@ -45,6 +46,7 @@ 
#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
@@ -158,6 +160,37 @@ enum ab8540_usb_link_status { 
	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,
@@ -378,6 +411,132 @@ static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host) 
#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.state = OTG_STATE_B_IDLE;

		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);

		}

		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);

		}

		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);

		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;

			}

		}

		break;



	default:

		break;

	}



	return 0;

}



static int ab8540_usb_link_status_update(struct ab8500_usb *ab,

		enum ab8540_usb_link_status lsts)

{
@@ -707,6 +866,13 @@ static int abx500_usb_link_status_update(struct ab8500_usb *ab) 
				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;
@@ -1146,6 +1312,43 @@ static void ab8500_usb_set_ab8540_tuning_values(struct ab8500_usb *ab) 
				err);

}



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);

}



static int ab8500_usb_probe(struct platform_device *pdev)

{

	struct ab8500_usb	*ab;
@@ -1198,6 +1401,12 @@ static int ab8500_usb_probe(struct platform_device *pdev) 
			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 */
@@ -1242,6 +1451,9 @@ static int ab8500_usb_probe(struct platform_device *pdev) 
	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);
@@ -1284,6 +1496,7 @@ static int ab8500_usb_remove(struct platform_device *pdev) 
static struct platform_device_id ab8500_usb_devtype[] = {

	{ .name = "ab8500-usb", },

	{ .name = "ab8540-usb", },

	{ .name = "ab9540-usb", },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype);