static int dwc3_intel_byt_notify_charger_type(struct dwc_otg2 *otg,
enum power_supply_charger_event event)
{
struct power_supply_cable_props cap;
unsigned long flags;
/* Just return if charger detection is not enabled */
if (!charger_detect_enable(otg) && !sdp_charging(otg))
return 0;
/* If OTG driver doesn't do charger detection, then no need
* to do notification on charger removal events */
if (!charger_detect_enable(otg) &&
(event == POWER_SUPPLY_CHARGER_EVENT_DISCONNECT)) {
otg_err(otg, "%s: disconnect ignore!\n", __func__);
return -EINVAL;
}
if (event > POWER_SUPPLY_CHARGER_EVENT_DISCONNECT) {
otg_err(otg,
"%s: Invalid power_supply_charger_event!\n", __func__);
return -EINVAL;
}
if ((otg->charging_cap.chrg_type ==
POWER_SUPPLY_CHARGER_TYPE_USB_SDP) &&
((otg->charging_cap.ma != 100) &&
(otg->charging_cap.ma != 150) &&
(otg->charging_cap.ma != 500) &&
(otg->charging_cap.ma != 900))) {
otg_err(otg, "%s: invalid SDP current!\n", __func__);
return -EINVAL;
}
spin_lock_irqsave(&otg->lock, flags);
cap.chrg_type = otg->charging_cap.chrg_type;
cap.ma = otg->charging_cap.ma;
cap.chrg_evt = event;
spin_unlock_irqrestore(&otg->lock, flags);
if (sdp_charging(otg))
atomic_notifier_call_chain(&otg->usb2_phy.notifier,
USB_EVENT_ENUMERATED, &cap.ma);
else
atomic_notifier_call_chain(&otg->usb2_phy.notifier,
USB_EVENT_CHARGER, &cap);
return 0;
}
static int dwc_otg_charger_hwdet(bool enable)
{
int retval;
struct usb_phy *phy;
struct dwc_otg2 *otg = dwc3_get_otg();
/* Just return if charger detection is not enabled */
if (!charger_detect_enable(otg))
return 0;
phy = usb_get_phy(USB_PHY_TYPE_USB2);
if (!phy)
return -ENODEV;
if (enable) {
retval = usb_phy_io_write(phy, PWCTRL_HWDETECT,
TUSB1211_POWER_CONTROL_SET);
if (retval)
return retval;
otg_dbg(otg, "set HWDETECT\n");
} else {
retval = usb_phy_io_write(phy, PWCTRL_HWDETECT,
TUSB1211_POWER_CONTROL_CLR);
if (retval)
return retval;
otg_dbg(otg, "clear HWDETECT\n");
}
usb_put_phy(phy);
return 0;
}
static int dwc3_intel_notify_charger_type(struct dwc_otg2 *otg,
enum power_supply_charger_event event)
{
struct power_supply_cable_props cap;
int ret = 0;
unsigned long flags;
if (!charger_detect_enable(otg) &&
((otg->charging_cap.chrg_type !=
POWER_SUPPLY_CHARGER_TYPE_USB_SDP) ||
event == POWER_SUPPLY_CHARGER_EVENT_DISCONNECT))
return 0;
if (event > POWER_SUPPLY_CHARGER_EVENT_DISCONNECT) {
otg_err(otg,
"%s: Invalid power_supply_charger_event!\n", __func__);
return -EINVAL;
}
if ((otg->charging_cap.chrg_type ==
POWER_SUPPLY_CHARGER_TYPE_USB_SDP) &&
((otg->charging_cap.ma != 0) &&
(otg->charging_cap.ma != 100) &&
(otg->charging_cap.ma != 150) &&
(otg->charging_cap.ma != 500) &&
(otg->charging_cap.ma != 900))) {
otg_err(otg, "%s: invalid SDP current!\n", __func__);
return -EINVAL;
}
spin_lock_irqsave(&otg->lock, flags);
cap.chrg_type = otg->charging_cap.chrg_type;
cap.ma = otg->charging_cap.ma;
cap.chrg_evt = event;
spin_unlock_irqrestore(&otg->lock, flags);
atomic_notifier_call_chain(&otg->usb2_phy.notifier, USB_EVENT_CHARGER,
&cap);
return ret;
}
static enum power_supply_charger_cable_type
dwc3_intel_byt_get_charger_type(struct dwc_otg2 *otg)
{
struct usb_phy *phy;
u8 val, vdat_det, chgd_serx_dm;
unsigned long timeout, interval;
enum power_supply_charger_cable_type type =
POWER_SUPPLY_CHARGER_TYPE_NONE;
/* No need to do charger detection if not enabled */
if (!charger_detect_enable(otg))
return POWER_SUPPLY_CHARGER_TYPE_USB_SDP;
phy = usb_get_phy(USB_PHY_TYPE_USB2);
if (!phy) {
otg_err(otg, "Get USB2 PHY failed\n");
return POWER_SUPPLY_CHARGER_TYPE_NONE;
}
/* PHY Enable:
* Power on PHY
*/
enable_usb_phy(otg, true);
/* Wait 10ms (~5ms before PHY de-asserts DIR,
* XXus for initial Link reg sync-up).*/
msleep(20);
/* DCD Enable: Change OPMODE to 01 (Non-driving),
* TermSel to 0, &
* XcvrSel to 01 (enable FS xcvr)
*/
usb_phy_io_write(phy, FUNCCTRL_OPMODE(1) | FUNCCTRL_XCVRSELECT(1),
TUSB1211_FUNC_CTRL_SET);
usb_phy_io_write(phy, FUNCCTRL_OPMODE(2) | FUNCCTRL_XCVRSELECT(2)
| FUNCCTRL_TERMSELECT,
TUSB1211_FUNC_CTRL_CLR);
/*Enable SW control*/
usb_phy_io_write(phy, PWCTRL_SW_CONTROL, TUSB1211_POWER_CONTROL_SET);
/* Enable IDPSRC */
usb_phy_io_write(phy, VS3_CHGD_IDP_SRC_EN,
TUSB1211_VENDOR_SPECIFIC3_SET);
/* Check DCD result, use same polling parameter */
timeout = jiffies + msecs_to_jiffies(DATACON_TIMEOUT);
interval = DATACON_INTERVAL * 1000; /* us */
/* DCD Check:
* Delay 66.5 ms. (Note:
* TIDP_SRC_ON + TCHGD_SERX_DEB =
* 347.8us + 66.1ms).
*/
usleep_range(66500, 67000);
while (!time_after(jiffies, timeout)) {
/* Read DP logic level. */
val = usb_phy_io_read(phy, TUSB1211_VENDOR_SPECIFIC4);
if (val < 0) {
otg_err(otg, "ULPI read error! try again\n");
continue;
}
if (!(val & VS4_CHGD_SERX_DP)) {
otg_info(otg, "Data contact detected!\n");
break;
}
/* Polling interval */
usleep_range(interval, interval + 2000);
}
/* Disable DP pullup (Idp_src) */
usb_phy_io_write(phy, VS3_CHGD_IDP_SRC_EN,
TUSB1211_VENDOR_SPECIFIC3_CLR);
/* SE1 Det Enable:
* Read DP/DM logic level. Note: use DEBUG
* because VS4 isn’t enabled in this situation.
*/
val = usb_phy_io_read(phy, TUSB1211_DEBUG);
if (val < 0)
otg_err(otg, "ULPI read error!\n");
val &= DEBUG_LINESTATE;
/* If '11': SE1 detected; goto 'Cleanup'.
* Else: goto 'Pri Det Enable'.
*/
if (val == 3) {
type = POWER_SUPPLY_CHARGER_TYPE_SE1;
goto cleanup;
}
/* Pri Det Enable:
* Enable VDPSRC.
*/
usb_phy_io_write(phy, PWCTRL_DP_VSRC_EN, TUSB1211_POWER_CONTROL_SET);
/* Wait >106.1ms (40ms for BC
* Tvdpsrc_on, 66.1ms for TI CHGD_SERX_DEB).
*/
msleep(107);
/* Pri Det Check:
* Check if DM > VDATREF.
*/
vdat_det = usb_phy_io_read(phy, TUSB1211_POWER_CONTROL);
if (vdat_det < 0)
otg_err(otg, "ULPI read error!\n");
vdat_det &= PWCTRL_VDAT_DET;
/* Check if DM<VLGC */
chgd_serx_dm = usb_phy_io_read(phy, TUSB1211_VENDOR_SPECIFIC4);
if (chgd_serx_dm < 0)
otg_err(otg, "ULPI read error!\n");
chgd_serx_dm &= VS4_CHGD_SERX_DM;
/* If VDAT_DET==0 || CHGD_SERX_DM==1: SDP detected
* If VDAT_DET==1 && CHGD_SERX_DM==0: CDP/DCP
*/
if (vdat_det == 0 || chgd_serx_dm == 1)
type = POWER_SUPPLY_CHARGER_TYPE_USB_SDP;
/* Disable VDPSRC. */
usb_phy_io_write(phy, PWCTRL_DP_VSRC_EN, TUSB1211_POWER_CONTROL_CLR);
/* If SDP, goto “Cleanup”.
* Else, goto “Sec Det Enable”
*/
if (type == POWER_SUPPLY_CHARGER_TYPE_USB_SDP)
goto cleanup;
/* Sec Det Enable:
* delay 1ms.
*/
usleep_range(1000, 1500);
/* Swap DP & DM */
usb_phy_io_write(phy, VS1_DATAPOLARITY, TUSB1211_VENDOR_SPECIFIC1_CLR);
/* Enable 'VDMSRC'. */
usb_phy_io_write(phy, PWCTRL_DP_VSRC_EN, TUSB1211_POWER_CONTROL_SET);
/* Wait >73ms (40ms for BC Tvdmsrc_on, 33ms for TI TVDPSRC_DEB) */
msleep(80);
/* Sec Det Check:
* Check if DP>VDATREF.
*/
val = usb_phy_io_read(phy, TUSB1211_POWER_CONTROL);
if (val < 0)
otg_err(otg, "ULPI read error!\n");
val &= PWCTRL_VDAT_DET;
/* If VDAT_DET==0: CDP detected.
* If VDAT_DET==1: DCP detected.
*/
if (!val)
type = POWER_SUPPLY_CHARGER_TYPE_USB_CDP;
else
type = POWER_SUPPLY_CHARGER_TYPE_USB_DCP;
/* Disable VDMSRC. */
usb_phy_io_write(phy, PWCTRL_DP_VSRC_EN, TUSB1211_POWER_CONTROL_CLR);
/* Swap DP & DM. */
usb_phy_io_write(phy, VS1_DATAPOLARITY, TUSB1211_VENDOR_SPECIFIC1_SET);
cleanup:
/* If DCP detected, assert VDPSRC. */
if (type == POWER_SUPPLY_CHARGER_TYPE_USB_DCP)
usb_phy_io_write(phy, PWCTRL_SW_CONTROL | PWCTRL_DP_VSRC_EN,
TUSB1211_POWER_CONTROL_SET);
usb_put_phy(phy);
switch (type) {
case POWER_SUPPLY_CHARGER_TYPE_ACA_DOCK:
case POWER_SUPPLY_CHARGER_TYPE_ACA_A:
case POWER_SUPPLY_CHARGER_TYPE_ACA_B:
case POWER_SUPPLY_CHARGER_TYPE_ACA_C:
case POWER_SUPPLY_CHARGER_TYPE_USB_DCP:
case POWER_SUPPLY_CHARGER_TYPE_USB_CDP:
case POWER_SUPPLY_CHARGER_TYPE_SE1:
dwc_otg_charger_hwdet(true);
break;
default:
break;
};
return type;
}
static int dwc3_intel_byt_set_power(struct usb_phy *_otg,
unsigned ma)
{
unsigned long flags;
struct dwc_otg2 *otg = dwc3_get_otg();
struct power_supply_cable_props cap;
struct intel_dwc_otg_pdata *data;
data = (struct intel_dwc_otg_pdata *)otg->otg_data;
if (!data)
return -EINVAL;
if (ma == OTG_USB2_100MA ||
ma == OTG_USB3_150MA ||
ma == OTG_USB2_500MA ||
ma == OTG_USB3_900MA ||
ma == OTG_DEVICE_RESUME) {
otg_dbg(otg, "cancel discon work\n");
__cancel_delayed_work(&data->suspend_discon_work);
} else if (ma == OTG_DEVICE_SUSPEND) {
otg_dbg(otg, "schedule discon work\n");
schedule_delayed_work(&data->suspend_discon_work,
SUSPEND_DISCONNECT_TIMEOUT);
}
/* Needn't notify charger capability if charger_detection disable */
if (!charger_detect_enable(otg) && !sdp_charging(otg))
return 0;
if (ma == OTG_DEVICE_SUSPEND) {
spin_lock_irqsave(&otg->lock, flags);
cap.chrg_type = otg->charging_cap.chrg_type;
cap.ma = otg->charging_cap.ma;
cap.chrg_evt = POWER_SUPPLY_CHARGER_EVENT_SUSPEND;
spin_unlock_irqrestore(&otg->lock, flags);
/* ma is zero mean D+/D- opened cable.
* If SMIP set, then notify 500ma.
* Otherwise, notify 0ma.
*/
if (!cap.ma) {
if (data->charging_compliance) {
cap.ma = 500;
cap.chrg_evt =
POWER_SUPPLY_CHARGER_EVENT_CONNECT;
}
/* For standard SDP, if SMIP set, then ignore suspend */
} else if (data->charging_compliance)
return 0;
/* Stander SDP(cap.ma != 0) and SMIP not set.
* Should send 0ma with SUSPEND event
*/
else
cap.ma = 2;
if (sdp_charging(otg))
atomic_notifier_call_chain(&otg->usb2_phy.notifier,
USB_EVENT_ENUMERATED, &cap.ma);
else
atomic_notifier_call_chain(&otg->usb2_phy.notifier,
USB_EVENT_CHARGER, &cap);
otg_dbg(otg, "Notify EM CHARGER_EVENT_SUSPEND\n");
return 0;
} else if (ma == OTG_DEVICE_RESUME) {
otg_dbg(otg, "Notify EM CHARGER_EVENT_CONNECT\n");
dwc3_intel_byt_notify_charger_type(otg,
POWER_SUPPLY_CHARGER_EVENT_CONNECT);
return 0;
}
/* For SMIP set case, only need to report 500/900ma */
if (data->charging_compliance) {
if ((ma != OTG_USB2_500MA) &&
(ma != OTG_USB3_900MA))
return 0;
}
/* Covert macro to integer number*/
switch (ma) {
case OTG_USB2_100MA:
ma = 100;
break;
case OTG_USB3_150MA:
ma = 150;
break;
case OTG_USB2_500MA:
ma = 500;
break;
case OTG_USB3_900MA:
ma = 900;
break;
default:
otg_err(otg, "Device driver set invalid SDP current value!\n");
return -EINVAL;
}
spin_lock_irqsave(&otg->lock, flags);
otg->charging_cap.ma = ma;
spin_unlock_irqrestore(&otg->lock, flags);
dwc3_intel_byt_notify_charger_type(otg,
POWER_SUPPLY_CHARGER_EVENT_CONNECT);
return 0;
}
static int dwc3_intel_handle_notification(struct notifier_block *nb,
unsigned long event, void *data)
{
int state;
unsigned long flags, valid_chrg_type;
struct dwc_otg2 *otg = dwc3_get_otg();
struct power_supply_cable_props *cap;
if (!otg)
return NOTIFY_BAD;
valid_chrg_type = POWER_SUPPLY_CHARGER_TYPE_USB_SDP |
POWER_SUPPLY_CHARGER_TYPE_USB_CDP |
POWER_SUPPLY_CHARGER_TYPE_ACA_DOCK;
spin_lock_irqsave(&otg->lock, flags);
switch (event) {
case USB_EVENT_ID:
otg->otg_events |= OEVT_CONN_ID_STS_CHNG_EVNT;
state = NOTIFY_OK;
break;
case USB_EVENT_VBUS:
/* WA for EM driver which should not sent VBUS event
* if UTMI PHY selected. */
if (!charger_detect_enable(otg)) {
state = NOTIFY_OK;
goto done;
}
if (*(int *)data) {
otg->otg_events |= OEVT_B_DEV_SES_VLD_DET_EVNT;
otg->otg_events &= ~OEVT_A_DEV_SESS_END_DET_EVNT;
} else {
otg->otg_events |= OEVT_A_DEV_SESS_END_DET_EVNT;
otg->otg_events &= ~OEVT_B_DEV_SES_VLD_DET_EVNT;
}
state = NOTIFY_OK;
break;
case USB_EVENT_CHARGER:
if (charger_detect_enable(otg)) {
state = NOTIFY_DONE;
goto done;
}
cap = (struct power_supply_cable_props *)data;
if (!(cap->chrg_type & valid_chrg_type)) {
otg_err(otg, "Ignore invalid charger type!\n");
state = NOTIFY_DONE;
goto done;
}
/* Ignore the events which send by USB driver itself. */
if (cap->chrg_evt == POWER_SUPPLY_CHARGER_EVENT_CONNECT)
if (cap_record.chrg_type == POWER_SUPPLY_CHARGER_TYPE_USB_SDP) {
state = NOTIFY_DONE;
goto done;
}
if (cap->chrg_evt == POWER_SUPPLY_CHARGER_EVENT_CONNECT) {
otg->otg_events |= OEVT_B_DEV_SES_VLD_DET_EVNT;
otg->otg_events &= ~OEVT_A_DEV_SESS_END_DET_EVNT;
cap_record.chrg_type = cap->chrg_type;
cap_record.ma = cap->ma;
cap_record.chrg_evt = cap->chrg_evt;
} else if (cap->chrg_evt ==
POWER_SUPPLY_CHARGER_EVENT_DISCONNECT) {
otg->otg_events |= OEVT_A_DEV_SESS_END_DET_EVNT;
otg->otg_events &= ~OEVT_B_DEV_SES_VLD_DET_EVNT;
cap_record.chrg_type = POWER_SUPPLY_CHARGER_TYPE_NONE;
cap_record.ma = 0;
cap_record.chrg_evt =
POWER_SUPPLY_CHARGER_EVENT_DISCONNECT;
}
if (cap->chrg_type == POWER_SUPPLY_CHARGER_TYPE_ACA_DOCK)
otg->otg_events |= OEVT_CONN_ID_STS_CHNG_EVNT;
state = NOTIFY_OK;
break;
default:
otg_dbg(otg, "DWC OTG Notify unknow notify message\n");
state = NOTIFY_DONE;
}
dwc3_wakeup_otg_thread(otg);
done:
spin_unlock_irqrestore(&otg->lock, flags);
return state;
}
