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gfiber / kernel / mindspeed / 63c764a7bdcf16103fcd68656d2c9ae28ea772a8 / . / drivers / usb / dwc_otg / dwc_otg_cil_intr.c
blob: 0581b49ff636aebd79dee073b87010bae7c455a0 [file] [log] [blame]
/* ==========================================================================
* $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_cil_intr.c $
* $Revision: #31 $
* $Date: 2011/10/24 $
* $Change: 1871286 $
*
* Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
* "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
* otherwise expressly agreed to in writing between Synopsys and you.
*
* The Software IS NOT an item of Licensed Software or Licensed Product under
* any End User Software License Agreement or Agreement for Licensed Product
* with Synopsys or any supplement thereto. You are permitted to use and
* redistribute this Software in source and binary forms, with or without
* modification, provided that redistributions of source code must retain this
* notice. You may not view, use, disclose, copy or distribute this file or
* any information contained herein except pursuant to this license grant from
* Synopsys. If you do not agree with this notice, including the disclaimer
* below, then you are not authorized to use the Software.
*
* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
* ========================================================================== */
/** @file
*
* The Core Interface Layer provides basic services for accessing and
* managing the DWC_otg hardware. These services are used by both the
* Host Controller Driver and the Peripheral Controller Driver.
*
* This file contains the Common Interrupt handlers.
*/
#include "dwc_os.h"
#include "dwc_otg_regs.h"
#include "dwc_otg_cil.h"
#include "dwc_otg_driver.h"
#include "dwc_otg_pcd.h"
#include "dwc_otg_hcd.h"
#ifdef DEBUG
inline const char *op_state_str(dwc_otg_core_if_t * core_if)
{
return (core_if->op_state == A_HOST ? "a_host" :
(core_if->op_state == A_SUSPEND ? "a_suspend" :
(core_if->op_state == A_PERIPHERAL ? "a_peripheral" :
(core_if->op_state == B_PERIPHERAL ? "b_peripheral" :
(core_if->op_state == B_HOST ? "b_host" : "unknown")))));
}
#endif
/** This function will log a debug message
*
* @param core_if Programming view of DWC_otg controller.
*/
int32_t dwc_otg_handle_mode_mismatch_intr(dwc_otg_core_if_t * core_if)
{
gintsts_data_t gintsts;
DWC_WARN("Mode Mismatch Interrupt: currently in %s mode\n",
dwc_otg_mode(core_if) ? "Host" : "Device");
/* Clear interrupt */
gintsts.d32 = 0;
gintsts.b.modemismatch = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
return 1;
}
/**
* This function handles the OTG Interrupts. It reads the OTG
* Interrupt Register (GOTGINT) to determine what interrupt has
* occurred.
*
* @param core_if Programming view of DWC_otg controller.
*/
int32_t dwc_otg_handle_otg_intr(dwc_otg_core_if_t * core_if)
{
dwc_otg_core_global_regs_t *global_regs = core_if->core_global_regs;
gotgint_data_t gotgint;
gotgctl_data_t gotgctl;
gintmsk_data_t gintmsk;
gpwrdn_data_t gpwrdn;
gotgint.d32 = DWC_READ_REG32(&global_regs->gotgint);
gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
DWC_DEBUGPL(DBG_CIL, "++OTG Interrupt gotgint=%0x [%s]\n", gotgint.d32,
op_state_str(core_if));
if (gotgint.b.sesenddet) {
DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
"Session End Detected++ (%s)\n",
op_state_str(core_if));
gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
if (core_if->op_state == B_HOST) {
cil_pcd_start(core_if);
core_if->op_state = B_PERIPHERAL;
} else {
/* If not B_HOST and Device HNP still set. HNP
* Did not succeed!*/
if (gotgctl.b.devhnpen) {
DWC_DEBUGPL(DBG_ANY, "Session End Detected\n");
__DWC_ERROR("Device Not Connected/Responding!\n");
}
/* If Session End Detected the B-Cable has
* been disconnected. */
/* Reset PCD and Gadget driver to a
* clean state. */
core_if->lx_state = DWC_OTG_L0;
DWC_SPINUNLOCK(core_if->lock);
cil_pcd_stop(core_if);
DWC_SPINLOCK(core_if->lock);
if (core_if->adp_enable) {
if (core_if->power_down == 2) {
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnswtch = 1;
DWC_MODIFY_REG32(&core_if->
core_global_regs->
gpwrdn, gpwrdn.d32, 0);
}
gpwrdn.d32 = 0;
gpwrdn.b.pmuintsel = 1;
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->
gpwrdn, 0, gpwrdn.d32);
dwc_otg_adp_sense_start(core_if);
}
}
gotgctl.d32 = 0;
gotgctl.b.devhnpen = 1;
DWC_MODIFY_REG32(&global_regs->gotgctl, gotgctl.d32, 0);
}
if (gotgint.b.sesreqsucstschng) {
DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
"Session Reqeust Success Status Change++\n");
gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
if (gotgctl.b.sesreqscs) {
if ((core_if->core_params->phy_type ==
DWC_PHY_TYPE_PARAM_FS) && (core_if->core_params->i2c_enable)) {
core_if->srp_success = 1;
} else {
DWC_SPINUNLOCK(core_if->lock);
cil_pcd_resume(core_if);
DWC_SPINLOCK(core_if->lock);
/* Clear Session Request */
gotgctl.d32 = 0;
gotgctl.b.sesreq = 1;
DWC_MODIFY_REG32(&global_regs->gotgctl,
gotgctl.d32, 0);
}
}
}
if (gotgint.b.hstnegsucstschng) {
/* Print statements during the HNP interrupt handling
* can cause it to fail.*/
gotgctl.d32 = DWC_READ_REG32(&global_regs->gotgctl);
if (gotgctl.b.hstnegscs) {
if (dwc_otg_is_host_mode(core_if)) {
core_if->op_state = B_HOST;
/*
* Need to disable SOF interrupt immediately.
* When switching from device to host, the PCD
* interrupt handler won't handle the
* interrupt if host mode is already set. The
* HCD interrupt handler won't get called if
* the HCD state is HALT. This means that the
* interrupt does not get handled and Linux
* complains loudly.
*/
gintmsk.d32 = 0;
gintmsk.b.sofintr = 1;
DWC_MODIFY_REG32(&global_regs->gintmsk,
gintmsk.d32, 0);
/* Call callback function with spin lock released */
DWC_SPINUNLOCK(core_if->lock);
cil_pcd_stop(core_if);
/*
* Initialize the Core for Host mode.
*/
cil_hcd_start(core_if);
DWC_SPINLOCK(core_if->lock);
core_if->op_state = B_HOST;
}
} else {
gotgctl.d32 = 0;
gotgctl.b.hnpreq = 1;
gotgctl.b.devhnpen = 1;
DWC_MODIFY_REG32(&global_regs->gotgctl, gotgctl.d32, 0);
DWC_DEBUGPL(DBG_ANY, "HNP Failed\n");
__DWC_ERROR("Device Not Connected/Responding\n");
}
}
if (gotgint.b.hstnegdet) {
/* The disconnect interrupt is set at the same time as
* Host Negotiation Detected. During the mode
* switch all interrupts are cleared so the disconnect
* interrupt handler will not get executed.
*/
DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
"Host Negotiation Detected++ (%s)\n",
(dwc_otg_is_host_mode(core_if) ? "Host" :
"Device"));
if (dwc_otg_is_device_mode(core_if)) {
DWC_DEBUGPL(DBG_ANY, "a_suspend->a_peripheral (%d)\n",
core_if->op_state);
DWC_SPINUNLOCK(core_if->lock);
cil_hcd_disconnect(core_if);
cil_pcd_start(core_if);
DWC_SPINLOCK(core_if->lock);
core_if->op_state = A_PERIPHERAL;
} else {
/*
* Need to disable SOF interrupt immediately. When
* switching from device to host, the PCD interrupt
* handler won't handle the interrupt if host mode is
* already set. The HCD interrupt handler won't get
* called if the HCD state is HALT. This means that
* the interrupt does not get handled and Linux
* complains loudly.
*/
gintmsk.d32 = 0;
gintmsk.b.sofintr = 1;
DWC_MODIFY_REG32(&global_regs->gintmsk, gintmsk.d32, 0);
DWC_SPINUNLOCK(core_if->lock);
cil_pcd_stop(core_if);
cil_hcd_start(core_if);
DWC_SPINLOCK(core_if->lock);
core_if->op_state = A_HOST;
}
}
if (gotgint.b.adevtoutchng) {
DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: "
"A-Device Timeout Change++\n");
}
if (gotgint.b.debdone) {
DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: " "Debounce Done++\n");
}
/* Clear GOTGINT */
DWC_WRITE_REG32(&core_if->core_global_regs->gotgint, gotgint.d32);
return 1;
}
void w_conn_id_status_change(void *p)
{
dwc_otg_core_if_t *core_if = p;
uint32_t count = 0;
gotgctl_data_t gotgctl = {.d32 = 0 };
gotgctl.d32 = DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
DWC_DEBUGPL(DBG_CIL, "gotgctl=%0x\n", gotgctl.d32);
DWC_DEBUGPL(DBG_CIL, "gotgctl.b.conidsts=%d\n", gotgctl.b.conidsts);
/* B-Device connector (Device Mode) */
if (gotgctl.b.conidsts) {
/* Wait for switch to device mode. */
while (!dwc_otg_is_device_mode(core_if)) {
DWC_PRINTF("Waiting for Peripheral Mode, Mode=%s\n",
(dwc_otg_is_host_mode(core_if) ? "Host" :
"Peripheral"));
dwc_mdelay(100);
if (++count > 10000)
break;
}
DWC_ASSERT(++count < 10000,
"Connection id status change timed out");
core_if->op_state = B_PERIPHERAL;
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_pcd_start(core_if);
} else {
/* A-Device connector (Host Mode) */
while (!dwc_otg_is_host_mode(core_if)) {
DWC_PRINTF("Waiting for Host Mode, Mode=%s\n",
(dwc_otg_is_host_mode(core_if) ? "Host" :
"Peripheral"));
dwc_mdelay(100);
if (++count > 10000)
break;
}
DWC_ASSERT(++count < 10000,
"Connection id status change timed out");
core_if->op_state = A_HOST;
/*
* Initialize the Core for Host mode.
*/
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_hcd_start(core_if);
}
}
/**
* This function handles the Connector ID Status Change Interrupt. It
* reads the OTG Interrupt Register (GOTCTL) to determine whether this
* is a Device to Host Mode transition or a Host Mode to Device
* Transition.
*
* This only occurs when the cable is connected/removed from the PHY
* connector.
*
* @param core_if Programming view of DWC_otg controller.
*/
int32_t dwc_otg_handle_conn_id_status_change_intr(dwc_otg_core_if_t * core_if)
{
/*
* Need to disable SOF interrupt immediately. If switching from device
* to host, the PCD interrupt handler won't handle the interrupt if
* host mode is already set. The HCD interrupt handler won't get
* called if the HCD state is HALT. This means that the interrupt does
* not get handled and Linux complains loudly.
*/
gintmsk_data_t gintmsk = {.d32 = 0 };
gintsts_data_t gintsts = {.d32 = 0 };
gintmsk.b.sofintr = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk, gintmsk.d32, 0);
DWC_DEBUGPL(DBG_CIL,
" ++Connector ID Status Change Interrupt++ (%s)\n",
(dwc_otg_is_host_mode(core_if) ? "Host" : "Device"));
if (core_if->lock)
DWC_SPINUNLOCK(core_if->lock);
/*
* Need to schedule a work, as there are possible DELAY function calls
* Release lock before scheduling workq as it holds spinlock during scheduling
*/
DWC_WORKQ_SCHEDULE(core_if->wq_otg, w_conn_id_status_change,
core_if, "connection id status change");
if (core_if->lock)
DWC_SPINLOCK(core_if->lock);
/* Set flag and clear interrupt */
gintsts.b.conidstschng = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
return 1;
}
/**
* This interrupt indicates that a device is initiating the Session
* Request Protocol to request the host to turn on bus power so a new
* session can begin. The handler responds by turning on bus power. If
* the DWC_otg controller is in low power mode, the handler brings the
* controller out of low power mode before turning on bus power.
*
* @param core_if Programming view of DWC_otg controller.
*/
int32_t dwc_otg_handle_session_req_intr(dwc_otg_core_if_t * core_if)
{
gintsts_data_t gintsts;
#ifndef DWC_HOST_ONLY
DWC_DEBUGPL(DBG_ANY, "++Session Request Interrupt++\n");
if (dwc_otg_is_device_mode(core_if)) {
DWC_PRINTF("SRP: Device mode\n");
} else {
hprt0_data_t hprt0;
DWC_PRINTF("SRP: Host mode\n");
/* Turn on the port power bit. */
hprt0.d32 = dwc_otg_read_hprt0(core_if);
hprt0.b.prtpwr = 1;
DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
/* Start the Connection timer. So a message can be displayed
* if connect does not occur within 10 seconds. */
cil_hcd_session_start(core_if);
}
#endif
/* Clear interrupt */
gintsts.d32 = 0;
gintsts.b.sessreqintr = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
return 1;
}
void w_wakeup_detected(void *p)
{
dwc_otg_core_if_t *core_if = (dwc_otg_core_if_t *) p;
/*
* Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms
* so that OPT tests pass with all PHYs).
*/
hprt0_data_t hprt0 = {.d32 = 0 };
#if 0
pcgcctl_data_t pcgcctl = {.d32 = 0 };
/* Restart the Phy Clock */
pcgcctl.b.stoppclk = 1;
DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
dwc_udelay(10);
#endif //0
hprt0.d32 = dwc_otg_read_hprt0(core_if);
DWC_DEBUGPL(DBG_ANY, "Resume: HPRT0=%0x\n", hprt0.d32);
// dwc_mdelay(70);
hprt0.b.prtres = 0; /* Resume */
DWC_WRITE_REG32(core_if->host_if->hprt0, hprt0.d32);
DWC_DEBUGPL(DBG_ANY, "Clear Resume: HPRT0=%0x\n",
DWC_READ_REG32(core_if->host_if->hprt0));
cil_hcd_resume(core_if);
/** Change to L0 state*/
core_if->lx_state = DWC_OTG_L0;
}
/**
* This interrupt indicates that the DWC_otg controller has detected a
* resume or remote wakeup sequence. If the DWC_otg controller is in
* low power mode, the handler must brings the controller out of low
* power mode. The controller automatically begins resume
* signaling. The handler schedules a time to stop resume signaling.
*/
int32_t dwc_otg_handle_wakeup_detected_intr(dwc_otg_core_if_t * core_if)
{
gintsts_data_t gintsts;
DWC_DEBUGPL(DBG_ANY,
"++Resume and Remote Wakeup Detected Interrupt++\n");
DWC_PRINTF("%s lxstate = %d\n", __func__, core_if->lx_state);
if (dwc_otg_is_device_mode(core_if)) {
dctl_data_t dctl = {.d32 = 0 };
DWC_DEBUGPL(DBG_PCD, "DSTS=0x%0x\n",
DWC_READ_REG32(&core_if->dev_if->
dev_global_regs->dsts));
if (core_if->lx_state == DWC_OTG_L2) {
#ifdef PARTIAL_POWER_DOWN
if (core_if->hwcfg4.b.power_optimiz) {
pcgcctl_data_t power = {.d32 = 0 };
power.d32 = DWC_READ_REG32(core_if->pcgcctl);
DWC_DEBUGPL(DBG_CIL, "PCGCCTL=%0x\n",
power.d32);
power.b.stoppclk = 0;
DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
power.b.pwrclmp = 0;
DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
power.b.rstpdwnmodule = 0;
DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
}
#endif
/* Clear the Remote Wakeup Signaling */
dctl.b.rmtwkupsig = 1;
DWC_MODIFY_REG32(&core_if->dev_if->
dev_global_regs->dctl, dctl.d32, 0);
DWC_SPINUNLOCK(core_if->lock);
if (core_if->pcd_cb && core_if->pcd_cb->resume_wakeup) {
core_if->pcd_cb->resume_wakeup(core_if->pcd_cb->p);
}
DWC_SPINLOCK(core_if->lock);
} else {
glpmcfg_data_t lpmcfg;
lpmcfg.d32 =
DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
lpmcfg.b.hird_thres &= (~(1 << 4));
DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg,
lpmcfg.d32);
}
/** Change to L0 state*/
core_if->lx_state = DWC_OTG_L0;
} else {
if (core_if->lx_state != DWC_OTG_L1) {
pcgcctl_data_t pcgcctl = {.d32 = 0 };
/* Restart the Phy Clock */
pcgcctl.b.stoppclk = 1;
DWC_MODIFY_REG32(core_if->pcgcctl, pcgcctl.d32, 0);
DWC_TIMER_SCHEDULE(core_if->wkp_timer, 71);
} else {
/** Change to L0 state*/
core_if->lx_state = DWC_OTG_L0;
}
}
/* Clear interrupt */
gintsts.d32 = 0;
gintsts.b.wkupintr = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
return 1;
}
/**
* This interrupt indicates that the Wakeup Logic has detected a
* Device disconnect.
*/
static int32_t dwc_otg_handle_pwrdn_disconnect_intr(dwc_otg_core_if_t *core_if)
{
gpwrdn_data_t gpwrdn = { .d32 = 0 };
gpwrdn_data_t gpwrdn_temp = { .d32 = 0 };
gpwrdn_temp.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
DWC_PRINTF("%s called\n", __FUNCTION__);
if (!core_if->hibernation_suspend) {
DWC_PRINTF("Already exited from Hibernation\n");
return 1;
}
/* Switch on the voltage to the core */
gpwrdn.b.pwrdnswtch = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Reset the core */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Disable power clamps*/
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnclmp = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
/* Remove reset the core signal */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
/* Disable PMU interrupt */
gpwrdn.d32 = 0;
gpwrdn.b.pmuintsel = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
core_if->hibernation_suspend = 0;
/* Disable PMU */
gpwrdn.d32 = 0;
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
if (gpwrdn_temp.b.idsts) {
core_if->op_state = B_PERIPHERAL;
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_pcd_start(core_if);
} else {
core_if->op_state = A_HOST;
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_hcd_start(core_if);
}
return 1;
}
/**
* This interrupt indicates that the Wakeup Logic has detected a
* remote wakeup sequence.
*/
static int32_t dwc_otg_handle_pwrdn_wakeup_detected_intr(dwc_otg_core_if_t * core_if)
{
gpwrdn_data_t gpwrdn = {.d32 = 0 };
DWC_DEBUGPL(DBG_ANY,
"++Powerdown Remote Wakeup Detected Interrupt++\n");
if (!core_if->hibernation_suspend) {
DWC_PRINTF("Already exited from Hibernation\n");
return 1;
}
gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
if (gpwrdn.b.idsts) { // Device Mode
if ((core_if->power_down == 2)
&& (core_if->hibernation_suspend == 1)) {
dwc_otg_device_hibernation_restore(core_if, 0, 0);
}
} else {
if ((core_if->power_down == 2)
&& (core_if->hibernation_suspend == 1)) {
dwc_otg_host_hibernation_restore(core_if, 1, 0);
}
}
return 1;
}
static int32_t dwc_otg_handle_pwrdn_idsts_change(dwc_otg_device_t *otg_dev)
{
gpwrdn_data_t gpwrdn = {.d32 = 0 };
gpwrdn_data_t gpwrdn_temp = {.d32 = 0 };
dwc_otg_core_if_t *core_if = otg_dev->core_if;
DWC_DEBUGPL(DBG_ANY, "%s called\n", __FUNCTION__);
gpwrdn_temp.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
if (core_if->power_down == 2)
{
if (!core_if->hibernation_suspend) {
DWC_PRINTF("Already exited from Hibernation\n");
return 1;
}
DWC_DEBUGPL(DBG_ANY, "Exit from hibernation on ID sts change\n");
/* Switch on the voltage to the core */
gpwrdn.b.pwrdnswtch = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Reset the core */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Disable power clamps */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnclmp = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
/* Remove reset the core signal */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
/* Disable PMU interrupt */
gpwrdn.d32 = 0;
gpwrdn.b.pmuintsel = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
/*Indicates that we are exiting from hibernation */
core_if->hibernation_suspend = 0;
/* Disable PMU */
gpwrdn.d32 = 0;
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
gpwrdn.d32 = core_if->gr_backup->gpwrdn_local;
if (gpwrdn.b.dis_vbus == 1) {
gpwrdn.d32 = 0;
gpwrdn.b.dis_vbus = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
}
if (gpwrdn_temp.b.idsts) {
core_if->op_state = B_PERIPHERAL;
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_pcd_start(core_if);
} else {
core_if->op_state = A_HOST;
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_hcd_start(core_if);
}
}
if (core_if->adp_enable)
{
uint8_t is_host = 0;
DWC_SPINUNLOCK(core_if->lock);
/* Change the core_if's lock to hcd/pcd lock depend on mode? */
#ifndef DWC_HOST_ONLY
if (gpwrdn_temp.b.idsts)
core_if->lock = otg_dev->pcd->lock;
#endif
#ifndef DWC_DEVICE_ONLY
if (!gpwrdn_temp.b.idsts) {
core_if->lock = otg_dev->hcd->lock;
is_host = 1;
}
#endif
DWC_PRINTF("RESTART ADP\n");
if (core_if->adp.probe_enabled)
dwc_otg_adp_probe_stop(core_if);
if (core_if->adp.sense_enabled)
dwc_otg_adp_sense_stop(core_if);
if (core_if->adp.sense_timer_started)
DWC_TIMER_CANCEL(core_if->adp.sense_timer);
if (core_if->adp.vbuson_timer_started)
DWC_TIMER_CANCEL(core_if->adp.vbuson_timer);
core_if->adp.probe_timer_values[0] = -1;
core_if->adp.probe_timer_values[1] = -1;
core_if->adp.sense_timer_started = 0;
core_if->adp.vbuson_timer_started = 0;
core_if->adp.probe_counter = 0;
core_if->adp.gpwrdn = 0;
/* Disable PMU and restart ADP */
gpwrdn_temp.d32 = 0;
gpwrdn_temp.b.pmuactv = 1;
gpwrdn_temp.b.pmuintsel = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
DWC_PRINTF("Check point 1\n");
dwc_mdelay(110);
dwc_otg_adp_start(core_if, is_host);
DWC_SPINLOCK(core_if->lock);
}
return 1;
}
static int32_t dwc_otg_handle_pwrdn_session_change(dwc_otg_core_if_t * core_if)
{
gpwrdn_data_t gpwrdn = {.d32 = 0 };
int32_t otg_cap_param = core_if->core_params->otg_cap;
DWC_DEBUGPL(DBG_ANY, "%s called\n", __FUNCTION__);
gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
if (core_if->power_down == 2) {
if (!core_if->hibernation_suspend) {
DWC_PRINTF("Already exited from Hibernation\n");
return 1;
}
if ((otg_cap_param != DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE ||
otg_cap_param != DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE) &&
gpwrdn.b.bsessvld == 0) {
/* Save gpwrdn register for further usage if stschng interrupt */
core_if->gr_backup->gpwrdn_local =
DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
/*Exit from ISR and wait for stschng interrupt with bsessvld = 1 */
return 1;
}
/* Switch on the voltage to the core */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnswtch = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Reset the core */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Disable power clamps */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnclmp = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
/* Remove reset the core signal */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
/* Disable PMU interrupt */
gpwrdn.d32 = 0;
gpwrdn.b.pmuintsel = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/*Indicates that we are exiting from hibernation */
core_if->hibernation_suspend = 0;
/* Disable PMU */
gpwrdn.d32 = 0;
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
core_if->op_state = B_PERIPHERAL;
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_pcd_start(core_if);
if (otg_cap_param == DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE ||
otg_cap_param == DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE) {
/*
* Initiate SRP after initial ADP probe.
*/
dwc_otg_initiate_srp(core_if);
}
}
return 1;
}
/**
* This interrupt indicates that the Wakeup Logic has detected a
* status change either on IDDIG or BSessVld.
*/
static uint32_t dwc_otg_handle_pwrdn_stschng_intr(dwc_otg_device_t *otg_dev)
{
int retval;
gpwrdn_data_t gpwrdn = {.d32 = 0 };
gpwrdn_data_t gpwrdn_temp = {.d32 = 0 };
dwc_otg_core_if_t *core_if = otg_dev->core_if;
DWC_PRINTF("%s called\n", __FUNCTION__);
if (core_if->power_down == 2) {
if (core_if->hibernation_suspend <= 0) {
DWC_PRINTF("Already exited from Hibernation\n");
return 1;
} else
gpwrdn_temp.d32 = core_if->gr_backup->gpwrdn_local;
} else {
gpwrdn_temp.d32 = core_if->adp.gpwrdn;
}
gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
if (gpwrdn.b.idsts ^ gpwrdn_temp.b.idsts) {
retval = dwc_otg_handle_pwrdn_idsts_change(otg_dev);
} else if (gpwrdn.b.bsessvld ^ gpwrdn_temp.b.bsessvld) {
retval = dwc_otg_handle_pwrdn_session_change(core_if);
}
return retval;
}
/**
* This interrupt indicates that the Wakeup Logic has detected a
* SRP.
*/
static int32_t dwc_otg_handle_pwrdn_srp_intr(dwc_otg_core_if_t * core_if)
{
gpwrdn_data_t gpwrdn = {.d32 = 0 };
DWC_PRINTF("%s called\n", __FUNCTION__);
if (!core_if->hibernation_suspend) {
DWC_PRINTF("Already exited from Hibernation\n");
return 1;
}
#ifdef DWC_DEV_SRPCAP
if (core_if->pwron_timer_started) {
core_if->pwron_timer_started = 0;
DWC_TIMER_CANCEL(core_if->pwron_timer);
}
#endif
/* Switch on the voltage to the core */
gpwrdn.b.pwrdnswtch = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Reset the core */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Disable power clamps */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnclmp = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
/* Remove reset the core signal */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnrstn = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
/* Disable PMU interrupt */
gpwrdn.d32 = 0;
gpwrdn.b.pmuintsel = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
/* Indicates that we are exiting from hibernation */
core_if->hibernation_suspend = 0;
/* Disable PMU */
gpwrdn.d32 = 0;
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
dwc_udelay(10);
/* Programm Disable VBUS to 0 */
gpwrdn.d32 = 0;
gpwrdn.b.dis_vbus = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, gpwrdn.d32, 0);
/*Initialize the core as Host */
core_if->op_state = A_HOST;
dwc_otg_core_init(core_if);
dwc_otg_enable_global_interrupts(core_if);
cil_hcd_start(core_if);
return 1;
}
/** This interrupt indicates that restore command after Hibernation
* was completed by the core. */
int32_t dwc_otg_handle_restore_done_intr(dwc_otg_core_if_t * core_if)
{
pcgcctl_data_t pcgcctl;
DWC_DEBUGPL(DBG_ANY, "++Restore Done Interrupt++\n");
//TODO De-assert restore signal. 8.a
pcgcctl.d32 = DWC_READ_REG32(core_if->pcgcctl);
if (pcgcctl.b.restoremode == 1) {
gintmsk_data_t gintmsk = {.d32 = 0 };
/*
* If restore mode is Remote Wakeup,
* unmask Remote Wakeup interrupt.
*/
gintmsk.b.wkupintr = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gintmsk,
0, gintmsk.d32);
}
return 1;
}
/**
* This interrupt indicates that a device has been disconnected from
* the root port.
*/
int32_t dwc_otg_handle_disconnect_intr(dwc_otg_core_if_t * core_if)
{
gintsts_data_t gintsts;
DWC_DEBUGPL(DBG_ANY, "++Disconnect Detected Interrupt++ (%s) %s\n",
(dwc_otg_is_host_mode(core_if) ? "Host" : "Device"),
op_state_str(core_if));
/** @todo Consolidate this if statement. */
#ifndef DWC_HOST_ONLY
if (core_if->op_state == B_HOST) {
/* If in device mode Disconnect and stop the HCD, then
* start the PCD. */
DWC_SPINUNLOCK(core_if->lock);
cil_hcd_disconnect(core_if);
cil_pcd_start(core_if);
DWC_SPINLOCK(core_if->lock);
core_if->op_state = B_PERIPHERAL;
} else if (dwc_otg_is_device_mode(core_if)) {
gotgctl_data_t gotgctl = {.d32 = 0 };
gotgctl.d32 =
DWC_READ_REG32(&core_if->core_global_regs->gotgctl);
if (gotgctl.b.hstsethnpen == 1) {
/* Do nothing, if HNP in process the OTG
* interrupt "Host Negotiation Detected"
* interrupt will do the mode switch.
*/
} else if (gotgctl.b.devhnpen == 0) {
/* If in device mode Disconnect and stop the HCD, then
* start the PCD. */
DWC_SPINUNLOCK(core_if->lock);
cil_hcd_disconnect(core_if);
cil_pcd_start(core_if);
DWC_SPINLOCK(core_if->lock);
core_if->op_state = B_PERIPHERAL;
} else {
DWC_DEBUGPL(DBG_ANY, "!a_peripheral && !devhnpen\n");
}
} else {
if (core_if->op_state == A_HOST) {
/* A-Cable still connected but device disconnected. */
cil_hcd_disconnect(core_if);
if (core_if->adp_enable) {
gpwrdn_data_t gpwrdn = { .d32 = 0 };
cil_hcd_stop(core_if);
/* Enable Power Down Logic */
gpwrdn.b.pmuintsel = 1;
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->gpwrdn, 0, gpwrdn.d32);
dwc_otg_adp_probe_start(core_if);
/* Power off the core */
if (core_if->power_down == 2) {
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnswtch = 1;
DWC_MODIFY_REG32(&core_if->
core_global_regs->
gpwrdn, gpwrdn.d32, 0);
}
}
}
}
#endif
/* Change to L3(OFF) state */
core_if->lx_state = DWC_OTG_L3;
gintsts.d32 = 0;
gintsts.b.disconnect = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
return 1;
}
/**
* This interrupt indicates that SUSPEND state has been detected on
* the USB.
*
* For HNP the USB Suspend interrupt signals the change from
* "a_peripheral" to "a_host".
*
* When power management is enabled the core will be put in low power
* mode.
*/
int32_t dwc_otg_handle_usb_suspend_intr(dwc_otg_core_if_t * core_if)
{
dsts_data_t dsts;
gintsts_data_t gintsts;
dcfg_data_t dcfg;
DWC_DEBUGPL(DBG_ANY, "USB SUSPEND\n");
if (dwc_otg_is_device_mode(core_if)) {
/* Check the Device status register to determine if the Suspend
* state is active. */
dsts.d32 =
DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dsts);
DWC_DEBUGPL(DBG_PCD, "DSTS=0x%0x\n", dsts.d32);
DWC_DEBUGPL(DBG_PCD, "DSTS.Suspend Status=%d "
"HWCFG4.power Optimize=%d\n",
dsts.b.suspsts, core_if->hwcfg4.b.power_optimiz);
#ifdef PARTIAL_POWER_DOWN
/** @todo Add a module parameter for power management. */
if (dsts.b.suspsts && core_if->hwcfg4.b.power_optimiz) {
pcgcctl_data_t power = {.d32 = 0 };
DWC_DEBUGPL(DBG_CIL, "suspend\n");
power.b.pwrclmp = 1;
DWC_WRITE_REG32(core_if->pcgcctl, power.d32);
power.b.rstpdwnmodule = 1;
DWC_MODIFY_REG32(core_if->pcgcctl, 0, power.d32);
power.b.stoppclk = 1;
DWC_MODIFY_REG32(core_if->pcgcctl, 0, power.d32);
} else {
DWC_DEBUGPL(DBG_ANY, "disconnect?\n");
}
#endif
/* PCD callback for suspend. Release the lock inside of callback function */
cil_pcd_suspend(core_if);
if (core_if->power_down == 2)
{
dcfg.d32 = DWC_READ_REG32(&core_if->dev_if->dev_global_regs->dcfg);
DWC_DEBUGPL(DBG_ANY,"lx_state = %08x\n",core_if->lx_state);
DWC_DEBUGPL(DBG_ANY," device address = %08d\n",dcfg.b.devaddr);
if (core_if->lx_state != DWC_OTG_L3 && dcfg.b.devaddr) {
pcgcctl_data_t pcgcctl = {.d32 = 0 };
gpwrdn_data_t gpwrdn = {.d32 = 0 };
gusbcfg_data_t gusbcfg = {.d32 = 0 };
/* Change to L2(suspend) state */
core_if->lx_state = DWC_OTG_L2;
/* Clear interrupt in gintsts */
gintsts.d32 = 0;
gintsts.b.usbsuspend = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->
gintsts, gintsts.d32);
DWC_PRINTF("Start of hibernation completed\n");
dwc_otg_save_global_regs(core_if);
dwc_otg_save_dev_regs(core_if);
gusbcfg.d32 =
DWC_READ_REG32(&core_if->core_global_regs->
gusbcfg);
if (gusbcfg.b.ulpi_utmi_sel == 1) {
/* ULPI interface */
/* Suspend the Phy Clock */
pcgcctl.d32 = 0;
pcgcctl.b.stoppclk = 1;
DWC_MODIFY_REG32(core_if->pcgcctl, 0,
pcgcctl.d32);
dwc_udelay(10);
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->
core_global_regs->
gpwrdn, 0, gpwrdn.d32);
} else {
/* UTMI+ Interface */
gpwrdn.b.pmuactv = 1;
DWC_MODIFY_REG32(&core_if->
core_global_regs->
gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
pcgcctl.b.stoppclk = 1;
DWC_MODIFY_REG32(core_if->pcgcctl, 0,
pcgcctl.d32);
dwc_udelay(10);
}
/* Set flag to indicate that we are in hibernation */
core_if->hibernation_suspend = 1;
/* Enable interrupts from wake up logic */
gpwrdn.d32 = 0;
gpwrdn.b.pmuintsel = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->
gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
/* Unmask device mode interrupts in GPWRDN */
gpwrdn.d32 = 0;
gpwrdn.b.rst_det_msk = 1;
gpwrdn.b.lnstchng_msk = 1;
gpwrdn.b.sts_chngint_msk = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->
gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
/* Enable Power Down Clamp */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnclmp = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->
gpwrdn, 0, gpwrdn.d32);
dwc_udelay(10);
/* Switch off VDD */
gpwrdn.d32 = 0;
gpwrdn.b.pwrdnswtch = 1;
DWC_MODIFY_REG32(&core_if->core_global_regs->
gpwrdn, 0, gpwrdn.d32);
/* Save gpwrdn register for further usage if stschng interrupt */
core_if->gr_backup->gpwrdn_local =
DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
DWC_PRINTF("Hibernation completed\n");
return 1;
}
}
} else {
if (core_if->op_state == A_PERIPHERAL) {
DWC_DEBUGPL(DBG_ANY, "a_peripheral->a_host\n");
/* Clear the a_peripheral flag, back to a_host. */
DWC_SPINUNLOCK(core_if->lock);
cil_pcd_stop(core_if);
cil_hcd_start(core_if);
DWC_SPINLOCK(core_if->lock);
core_if->op_state = A_HOST;
}
}
/* Change to L2(suspend) state */
core_if->lx_state = DWC_OTG_L2;
/* Clear interrupt */
gintsts.d32 = 0;
gintsts.b.usbsuspend = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
return 1;
}
#ifdef CONFIG_USB_DWC_OTG_LPM
/**
* This function hadles LPM transaction received interrupt.
*/
static int32_t dwc_otg_handle_lpm_intr(dwc_otg_core_if_t * core_if)
{
glpmcfg_data_t lpmcfg;
gintsts_data_t gintsts;
if (!core_if->core_params->lpm_enable) {
DWC_PRINTF("Unexpected LPM interrupt\n");
}
lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
DWC_PRINTF("LPM config register = 0x%08x\n", lpmcfg.d32);
if (dwc_otg_is_host_mode(core_if)) {
cil_hcd_sleep(core_if);
} else {
lpmcfg.b.hird_thres |= (1 << 4);
DWC_WRITE_REG32(&core_if->core_global_regs->glpmcfg,
lpmcfg.d32);
}
/* Examine prt_sleep_sts after TL1TokenTetry period max (10 us) */
dwc_udelay(10);
lpmcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->glpmcfg);
if (lpmcfg.b.prt_sleep_sts) {
/* Save the current state */
core_if->lx_state = DWC_OTG_L1;
}
/* Clear interrupt */
gintsts.d32 = 0;
gintsts.b.lpmtranrcvd = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts, gintsts.d32);
return 1;
}
#endif /* CONFIG_USB_DWC_OTG_LPM */
/**
* This function returns the Core Interrupt register.
*/
static inline uint32_t dwc_otg_read_common_intr(dwc_otg_core_if_t * core_if)
{
gahbcfg_data_t gahbcfg = {.d32 = 0 };
gintsts_data_t gintsts;
gintmsk_data_t gintmsk;
gintmsk_data_t gintmsk_common = {.d32 = 0 };
gintmsk_common.b.wkupintr = 1;
gintmsk_common.b.sessreqintr = 1;
gintmsk_common.b.conidstschng = 1;
gintmsk_common.b.otgintr = 1;
gintmsk_common.b.modemismatch = 1;
gintmsk_common.b.disconnect = 1;
gintmsk_common.b.usbsuspend = 1;
#ifdef CONFIG_USB_DWC_OTG_LPM
gintmsk_common.b.lpmtranrcvd = 1;
#endif
gintmsk_common.b.restoredone = 1;
/** @todo: The port interrupt occurs while in device
* mode. Added code to CIL to clear the interrupt for now!
*/
gintmsk_common.b.portintr = 1;
gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts);
gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk);
gahbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gahbcfg);
#ifdef DEBUG
/* if any common interrupts set */
if (gintsts.d32 & gintmsk_common.d32) {
DWC_DEBUGPL(DBG_ANY, "gintsts=%08x gintmsk=%08x\n",
gintsts.d32, gintmsk.d32);
}
#endif
if (gahbcfg.b.glblintrmsk)
return ((gintsts.d32 & gintmsk.d32) & gintmsk_common.d32);
else
return 0;
}
/* MACRO for clearing interupt bits in GPWRDN register */
#define CLEAR_GPWRDN_INTR(__core_if,__intr) \
do { \
gpwrdn_data_t gpwrdn = {.d32=0}; \
gpwrdn.b.__intr = 1; \
DWC_MODIFY_REG32(&__core_if->core_global_regs->gpwrdn, \
0, gpwrdn.d32); \
} while (0)
/**
* Common interrupt handler.
*
* The common interrupts are those that occur in both Host and Device mode.
* This handler handles the following interrupts:
* - Mode Mismatch Interrupt
* - Disconnect Interrupt
* - OTG Interrupt
* - Connector ID Status Change Interrupt
* - Session Request Interrupt.
* - Resume / Remote Wakeup Detected Interrupt.
* - LPM Transaction Received Interrupt
* - ADP Transaction Received Interrupt
*
*/
int32_t dwc_otg_handle_common_intr(void *dev)
{
int retval = 0;
gintsts_data_t gintsts;
gpwrdn_data_t gpwrdn = {.d32 = 0 };
dwc_otg_device_t *otg_dev = dev;
dwc_otg_core_if_t *core_if = otg_dev->core_if;
gpwrdn.d32 = DWC_READ_REG32(&core_if->core_global_regs->gpwrdn);
if (dwc_otg_is_device_mode(core_if))
core_if->frame_num = dwc_otg_get_frame_number(core_if);
if (core_if->lock)
DWC_SPINLOCK(core_if->lock);
if (core_if->hibernation_suspend <= 0) {
gintsts.d32 = dwc_otg_read_common_intr(core_if);
if (gintsts.b.modemismatch) {
retval |= dwc_otg_handle_mode_mismatch_intr(core_if);
}
if (gintsts.b.otgintr) {
retval |= dwc_otg_handle_otg_intr(core_if);
}
if (gintsts.b.conidstschng) {
retval |= dwc_otg_handle_conn_id_status_change_intr(core_if);
}
if (gintsts.b.disconnect) {
retval |= dwc_otg_handle_disconnect_intr(core_if);
}
if (gintsts.b.sessreqintr) {
retval |= dwc_otg_handle_session_req_intr(core_if);
}
if (gintsts.b.wkupintr) {
retval |= dwc_otg_handle_wakeup_detected_intr(core_if);
}
if (gintsts.b.usbsuspend) {
retval |= dwc_otg_handle_usb_suspend_intr(core_if);
}
#ifdef CONFIG_USB_DWC_OTG_LPM
if (gintsts.b.lpmtranrcvd) {
retval |= dwc_otg_handle_lpm_intr(core_if);
}
#endif
if (gintsts.b.restoredone) {
gintsts.d32 = 0;
if (core_if->power_down == 2)
core_if->hibernation_suspend = -1;
gintsts.b.restoredone = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts,gintsts.d32);
DWC_PRINTF(" --Restore done interrupt received-- \n");
retval |= 1;
}
if (gintsts.b.portintr && dwc_otg_is_device_mode(core_if)) {
/* The port interrupt occurs while in device mode with HPRT0
* Port Enable/Disable.
*/
gintsts.d32 = 0;
gintsts.b.portintr = 1;
DWC_WRITE_REG32(&core_if->core_global_regs->gintsts,gintsts.d32);
retval |= 1;
}
} else {
DWC_DEBUGPL(DBG_ANY, "gpwrdn=%08x\n", gpwrdn.d32);
if (gpwrdn.b.disconn_det && gpwrdn.b.disconn_det_msk) {
CLEAR_GPWRDN_INTR(core_if, disconn_det);
if (gpwrdn.b.linestate == 0) {
dwc_otg_handle_pwrdn_disconnect_intr(core_if);
} else {
DWC_PRINTF("Disconnect detected while linestate is not 0\n");
}
retval |= 1;
}
if (gpwrdn.b.lnstschng && gpwrdn.b.lnstchng_msk) {
CLEAR_GPWRDN_INTR(core_if, lnstschng);
/* remote wakeup from hibernation */
if (gpwrdn.b.linestate == 2 || gpwrdn.b.linestate == 1) {
dwc_otg_handle_pwrdn_wakeup_detected_intr(core_if);
} else {
DWC_PRINTF("gpwrdn.linestate = %d\n", gpwrdn.b.linestate);
}
retval |= 1;
}
if (gpwrdn.b.rst_det && gpwrdn.b.rst_det_msk) {
CLEAR_GPWRDN_INTR(core_if, rst_det);
if (gpwrdn.b.linestate == 0) {
DWC_PRINTF("Reset detected\n");
retval |= dwc_otg_device_hibernation_restore(core_if, 0, 1);
}
}
if (gpwrdn.b.srp_det && gpwrdn.b.srp_det_msk) {
CLEAR_GPWRDN_INTR(core_if, srp_det);
dwc_otg_handle_pwrdn_srp_intr(core_if);
retval |= 1;
}
}
/* Handle ADP interrupt here */
if (gpwrdn.b.adp_int) {
DWC_PRINTF("ADP interrupt\n");
CLEAR_GPWRDN_INTR(core_if, adp_int);
dwc_otg_adp_handle_intr(core_if);
retval |= 1;
}
if (gpwrdn.b.sts_chngint && gpwrdn.b.sts_chngint_msk) {
DWC_PRINTF("STS CHNG interrupt asserted\n");
CLEAR_GPWRDN_INTR(core_if, sts_chngint);
dwc_otg_handle_pwrdn_stschng_intr(otg_dev);
retval |= 1;
}
if (core_if->lock)
DWC_SPINUNLOCK(core_if->lock);
return retval;
}