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path: root/drivers/usb/phy/phy-ab8500-usb.c
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-rw-r--r--drivers/usb/phy/phy-ab8500-usb.c846
1 files changed, 726 insertions, 120 deletions
diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index e5eb1b5a04eb..087402350b6d 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -1,10 +1,12 @@
/*
* drivers/usb/otg/ab8500_usb.c
*
- * USB transceiver driver for AB8500 chip
+ * USB transceiver driver for AB8500 family chips
*
- * Copyright (C) 2010 ST-Ericsson AB
+ * 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
@@ -29,6 +31,8 @@
#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>
@@ -41,21 +45,34 @@
/* 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 */
@@ -112,6 +129,68 @@ enum ab8505_usb_link_status {
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,
@@ -119,13 +198,30 @@ enum ab8500_usb_mode {
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;
@@ -133,6 +229,8 @@ struct ab8500_usb {
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)
@@ -171,7 +269,7 @@ static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
if (ret)
dev_err(ab->dev, "Failed to enable v-ape\n");
- if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
+ 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");
@@ -191,7 +289,7 @@ static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
if (ret)
dev_err(ab->dev, "Failed to enable vddulpivio18\n");
- if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
+ 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",
@@ -212,7 +310,7 @@ static void ab8500_usb_regulator_disable(struct ab8500_usb *ab)
regulator_disable(ab->v_ulpi);
/* USB is not the only consumer of Vintcore, restore old settings */
- if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
+ 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);
@@ -252,11 +350,23 @@ static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host)
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);
+ }
}
static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
@@ -274,6 +384,8 @@ static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
/* 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)) {
@@ -286,7 +398,8 @@ static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
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 idddet, release them to allow
+ /*
+ * as USB pins are shared with iddet, release them to allow
* iddet to request them
*/
pinctrl_put(ab->pinctrl);
@@ -298,6 +411,254 @@ 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)
+{
+ 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.state = OTG_STATE_B_IDLE;
+ 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);
+ }
+ 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);
+ 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;
+ }
+ break;
+
+ default:
+ event = UX500_MUSB_NONE;
+ break;
+ }
+
+ return 0;
+}
+
static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
enum ab8505_usb_link_status lsts)
{
@@ -498,6 +859,20 @@ static int abx500_usb_link_status_update(struct ab8500_usb *ab)
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;
@@ -553,7 +928,7 @@ static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data)
static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data)
{
- struct ab8500_usb *ab = (struct ab8500_usb *) data;
+ struct ab8500_usb *ab = (struct ab8500_usb *)data;
abx500_usb_link_status_update(ab);
@@ -572,6 +947,69 @@ static void ab8500_usb_phy_disable_work(struct work_struct *work)
ab8500_usb_peri_phy_dis(ab);
}
+/* 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;
+}
+
+/* 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;
+}
+
static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)
{
/*
@@ -627,7 +1065,7 @@ static int ab8500_usb_set_peripheral(struct usb_otg *otg,
* is fixed.
*/
- if ((ab->mode != USB_IDLE) && (!gadget)) {
+ if ((ab->mode != USB_IDLE) && !gadget) {
ab->mode = USB_IDLE;
schedule_work(&ab->phy_dis_work);
}
@@ -651,7 +1089,7 @@ static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
* is fixed.
*/
- if ((ab->mode != USB_IDLE) && (!host)) {
+ if ((ab->mode != USB_IDLE) && !host) {
ab->mode = USB_IDLE;
schedule_work(&ab->phy_dis_work);
}
@@ -659,6 +1097,33 @@ static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
return 0;
}
+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);
+}
+
static int ab8500_usb_regulator_get(struct ab8500_usb *ab)
{
int err;
@@ -693,48 +1158,197 @@ static int ab8500_usb_irq_setup(struct platform_device *pdev,
int err;
int 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, "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_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,
+ "usb-link-status", ab);
+ if (err < 0) {
+ dev_err(ab->dev, "request_irq failed for link status irq\n");
+ return err;
+ }
}
- 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, "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_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,
+ "usb-id-fall", ab);
+ if (err < 0) {
+ dev_err(ab->dev, "request_irq failed for ID fall irq\n");
+ return err;
+ }
}
- 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, "usb-vbus-fall", ab);
- if (err < 0) {
- dev_err(ab->dev, "request_irq failed for Vbus 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,
+ "usb-vbus-fall", ab);
+ if (err < 0) {
+ dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
+ return err;
+ }
}
return 0;
}
+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);
+}
+
+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);
+}
+
+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);
+}
+
+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;
@@ -772,6 +1386,33 @@ static int ab8500_usb_probe(struct platform_device *pdev)
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);
ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier);
@@ -779,10 +1420,18 @@ static int ab8500_usb_probe(struct platform_device *pdev)
/* 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;
@@ -793,85 +1442,33 @@ static int ab8500_usb_probe(struct platform_device *pdev)
return err;
}
- /* Phy tuning values for AB8500 */
- if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
- /* 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);
- }
-
- /* Phy tuning values for AB8505 */
- if (is_ab8505(ab->ab8500)) {
- /* 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);
- }
+ 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);
@@ -884,6 +1481,7 @@ 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);
@@ -895,11 +1493,20 @@ static int ab8500_usb_remove(struct platform_device *pdev)
return 0;
}
+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);
+
static struct platform_driver ab8500_usb_driver = {
.probe = ab8500_usb_probe,
.remove = ab8500_usb_remove,
+ .id_table = ab8500_usb_devtype,
.driver = {
- .name = "ab8500-usb",
+ .name = "abx5x0-usb",
.owner = THIS_MODULE,
},
};
@@ -916,7 +1523,6 @@ static void __exit ab8500_usb_exit(void)
}
module_exit(ab8500_usb_exit);
-MODULE_ALIAS("platform:ab8500_usb");
MODULE_AUTHOR("ST-Ericsson AB");
-MODULE_DESCRIPTION("AB8500 usb transceiver driver");
+MODULE_DESCRIPTION("AB8500 family usb transceiver driver");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.0.4) at 2024-12-28 04:19:07 +0000