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linux/drivers/usb/dwc2/core_intr.c

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staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
/*
* core_intr.c - DesignWare HS OTG Controller common interrupt handling
*
* Copyright (C) 2004-2013 Synopsys, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS 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.
*/
/*
* This file contains the common interrupt handlers
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ch11.h>
#include "core.h"
#include "hcd.h"
static const char *dwc2_op_state_str(struct dwc2_hsotg *hsotg)
{
switch (hsotg->op_state) {
case OTG_STATE_A_HOST:
return "a_host";
case OTG_STATE_A_SUSPEND:
return "a_suspend";
case OTG_STATE_A_PERIPHERAL:
return "a_peripheral";
case OTG_STATE_B_PERIPHERAL:
return "b_peripheral";
case OTG_STATE_B_HOST:
return "b_host";
default:
return "unknown";
}
}
usb: dwc2: handle the Host Port Interrupt when it occurs in device mode According to the spec for the DWC2 controller, when the PRTINT interrupt fires, the application must clear the appropriate status bit in the Host Port Control and Status register to clear this bit. When disconnecting an A-cable when the dwc2 host driver, the PRTINT fires, but only the GINTSTS_PRTINT status is cleared, no action is done with the HPRT0 register. The HPRT0_ENACHG bit in the HPRT0 must also be poked to correctly clear the GINTSTS_PRTINT interrupt. I am seeing this behavoir on v2.93 of the DWC2 IP. When I disconnect an OTG A-cable adapter, the PRTINT interrupt fires when the DWC2 is in device mode and is never cleared. This patch adds the function to read the HPRT0 register when the PRTINT fires and the dwc2 IP has already transitioned to device mode. This function is only clearing the HPRT0_ENACHG bit for now, but can be modified to handle more. Signed-off-by: Dinh Nguyen <dinguyen@altera.com> [ paulz: modified patch to preserve HPRT0_ENA bit ] Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-04 23:19:40 +00:00
/**
* dwc2_handle_usb_port_intr - handles OTG PRTINT interrupts.
* When the PRTINT interrupt fires, there are certain status bits in the Host
* Port that needs to get cleared.
*
* @hsotg: Programming view of DWC_otg controller
*/
static void dwc2_handle_usb_port_intr(struct dwc2_hsotg *hsotg)
{
u32 hprt0 = readl(hsotg->regs + HPRT0);
if (hprt0 & HPRT0_ENACHG) {
hprt0 &= ~HPRT0_ENA;
writel(hprt0, hsotg->regs + HPRT0);
}
/* Clear interrupt */
writel(GINTSTS_PRTINT, hsotg->regs + GINTSTS);
}
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
/**
* dwc2_handle_mode_mismatch_intr() - Logs a mode mismatch warning message
*
* @hsotg: Programming view of DWC_otg controller
*/
static void dwc2_handle_mode_mismatch_intr(struct dwc2_hsotg *hsotg)
{
dev_warn(hsotg->dev, "Mode Mismatch Interrupt: currently in %s mode\n",
dwc2_is_host_mode(hsotg) ? "Host" : "Device");
/* Clear interrupt */
writel(GINTSTS_MODEMIS, hsotg->regs + GINTSTS);
}
/**
* dwc2_handle_otg_intr() - Handles the OTG Interrupts. It reads the OTG
* Interrupt Register (GOTGINT) to determine what interrupt has occurred.
*
* @hsotg: Programming view of DWC_otg controller
*/
static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
{
u32 gotgint;
u32 gotgctl;
u32 gintmsk;
gotgint = readl(hsotg->regs + GOTGINT);
gotgctl = readl(hsotg->regs + GOTGCTL);
dev_dbg(hsotg->dev, "++OTG Interrupt gotgint=%0x [%s]\n", gotgint,
dwc2_op_state_str(hsotg));
if (gotgint & GOTGINT_SES_END_DET) {
dev_dbg(hsotg->dev,
" ++OTG Interrupt: Session End Detected++ (%s)\n",
dwc2_op_state_str(hsotg));
gotgctl = readl(hsotg->regs + GOTGCTL);
usb: dwc2: gadget: rework disconnect event handling This patch adds a call to s3c_hsotg_disconnect() from 'end session' interrupt (GOTGINT_SES_END_DET) to correctly notify gadget subsystem about unplugged usb cable. DISCONNINT interrupt cannot be used for this purpose, because it is asserted only in host mode. To avoid reporting disconnect event more than once, a disconnect call has been moved from USB_REQ_SET_ADDRESS handling function to SESSREQINT interrupt. This way driver ensures that disconnect event is reported either when usb cable is unplugged or every time the host starts a new session. To handle devices which has been synthesized without SRP support, connected state is set in ENUMDONE interrupt. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-11-21 14:14:47 +00:00
if (dwc2_is_device_mode(hsotg))
s3c_hsotg_disconnect(hsotg);
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
if (hsotg->op_state == OTG_STATE_B_HOST) {
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
} else {
/*
* If not B_HOST and Device HNP still set, HNP did
* not succeed!
*/
if (gotgctl & GOTGCTL_DEVHNPEN) {
dev_dbg(hsotg->dev, "Session End Detected\n");
dev_err(hsotg->dev,
"Device Not Connected/Responding!\n");
}
/*
* If Session End Detected the B-Cable has been
* disconnected
*/
/* Reset to a clean state */
hsotg->lx_state = DWC2_L0;
}
gotgctl = readl(hsotg->regs + GOTGCTL);
gotgctl &= ~GOTGCTL_DEVHNPEN;
writel(gotgctl, hsotg->regs + GOTGCTL);
}
if (gotgint & GOTGINT_SES_REQ_SUC_STS_CHNG) {
dev_dbg(hsotg->dev,
" ++OTG Interrupt: Session Request Success Status Change++\n");
gotgctl = readl(hsotg->regs + GOTGCTL);
if (gotgctl & GOTGCTL_SESREQSCS) {
if (hsotg->core_params->phy_type ==
DWC2_PHY_TYPE_PARAM_FS
&& hsotg->core_params->i2c_enable > 0) {
hsotg->srp_success = 1;
} else {
/* Clear Session Request */
gotgctl = readl(hsotg->regs + GOTGCTL);
gotgctl &= ~GOTGCTL_SESREQ;
writel(gotgctl, hsotg->regs + GOTGCTL);
}
}
}
if (gotgint & GOTGINT_HST_NEG_SUC_STS_CHNG) {
/*
* Print statements during the HNP interrupt handling
* can cause it to fail
*/
gotgctl = readl(hsotg->regs + GOTGCTL);
/*
* WA for 3.00a- HW is not setting cur_mode, even sometimes
* this does not help
*/
staging: dwc2: interpret all hwcfg and related register at init time Before, the hwcfg registers were read at device init time, but interpreted at various parts in the code. This commit unpacks the hwcfg register values into a struct with properly labeled variables at init time, which makes all the other code using these values more consise and easier to read. Some values that were previously stored in the hsotg struct are now moved into this new struct as well. In addition to the hwcfg registers, the contents of some fifo size registers are also unpacked. The hwcfg registers are read-only, so they can be safely stored. The fifo size registers are read-write registers, but their power-on values are significant: they give the maximum depth of the fifo they describe. This commit mostly moves code, but also attempts to simplify some expressions from (val >> shift) & (mask >> shift) to (val & mask) >> shift. Finally, all of the parameters read from the hardware are debug printed after unpacking them, so a bunch of debug prints can be removed from other places. Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-30 16:45:21 +00:00
if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a)
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
udelay(100);
if (gotgctl & GOTGCTL_HSTNEGSCS) {
if (dwc2_is_host_mode(hsotg)) {
hsotg->op_state = OTG_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 = readl(hsotg->regs + GINTMSK);
gintmsk &= ~GINTSTS_SOF;
writel(gintmsk, hsotg->regs + GINTMSK);
/*
* Call callback function with spin lock
* released
*/
spin_unlock(&hsotg->lock);
/* Initialize the Core for Host mode */
dwc2_hcd_start(hsotg);
spin_lock(&hsotg->lock);
hsotg->op_state = OTG_STATE_B_HOST;
}
} else {
gotgctl = readl(hsotg->regs + GOTGCTL);
gotgctl &= ~(GOTGCTL_HNPREQ | GOTGCTL_DEVHNPEN);
writel(gotgctl, hsotg->regs + GOTGCTL);
dev_dbg(hsotg->dev, "HNP Failed\n");
dev_err(hsotg->dev,
"Device Not Connected/Responding\n");
}
}
if (gotgint & GOTGINT_HST_NEG_DET) {
/*
* 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.
*/
dev_dbg(hsotg->dev,
" ++OTG Interrupt: Host Negotiation Detected++ (%s)\n",
(dwc2_is_host_mode(hsotg) ? "Host" : "Device"));
if (dwc2_is_device_mode(hsotg)) {
dev_dbg(hsotg->dev, "a_suspend->a_peripheral (%d)\n",
hsotg->op_state);
spin_unlock(&hsotg->lock);
dwc2_hcd_disconnect(hsotg);
spin_lock(&hsotg->lock);
hsotg->op_state = OTG_STATE_A_PERIPHERAL;
} else {
/* Need to disable SOF interrupt immediately */
gintmsk = readl(hsotg->regs + GINTMSK);
gintmsk &= ~GINTSTS_SOF;
writel(gintmsk, hsotg->regs + GINTMSK);
spin_unlock(&hsotg->lock);
dwc2_hcd_start(hsotg);
spin_lock(&hsotg->lock);
hsotg->op_state = OTG_STATE_A_HOST;
}
}
if (gotgint & GOTGINT_A_DEV_TOUT_CHG)
dev_dbg(hsotg->dev,
" ++OTG Interrupt: A-Device Timeout Change++\n");
if (gotgint & GOTGINT_DBNCE_DONE)
dev_dbg(hsotg->dev, " ++OTG Interrupt: Debounce Done++\n");
/* Clear GOTGINT */
writel(gotgint, hsotg->regs + GOTGINT);
}
/**
* dwc2_handle_conn_id_status_change_intr() - Handles the Connector ID Status
* Change Interrupt
*
* @hsotg: Programming view of DWC_otg controller
*
* Reads the OTG Interrupt Register (GOTCTL) to determine whether this is a
* Device to Host Mode transition or a Host to Device Mode transition. This only
* occurs when the cable is connected/removed from the PHY connector.
*/
static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
{
u32 gintmsk = readl(hsotg->regs + GINTMSK);
/* Need to disable SOF interrupt immediately */
gintmsk &= ~GINTSTS_SOF;
writel(gintmsk, hsotg->regs + GINTMSK);
dev_dbg(hsotg->dev, " ++Connector ID Status Change Interrupt++ (%s)\n",
dwc2_is_host_mode(hsotg) ? "Host" : "Device");
/*
* Need to schedule a work, as there are possible DELAY function calls.
* Release lock before scheduling workq as it holds spinlock during
* scheduling.
*/
usb: dwc2: Move gadget probe function into platform code This patch will aggregate the probing of gadget/hcd driver into platform.c. The gadget probe funtion is converted into gadget_init that is now only responsible for gadget only initialization. All the gadget resources are now handled by platform.c Since the host workqueue will not get initialized if the driver is configured for peripheral mode only. Thus we need to check for wq_otg before calling queue_work(). Also, we move spin_lock_init to common location for both host and gadget that is either in platform.c or pci.c. We also move suspend/resume code to common platform code. Lastly, move the "samsung,s3c6400-hsotg" binding into dwc2_of_match_table. Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-11-11 17:13:34 +00:00
if (hsotg->wq_otg) {
spin_unlock(&hsotg->lock);
queue_work(hsotg->wq_otg, &hsotg->wf_otg);
spin_lock(&hsotg->lock);
}
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
/* Clear interrupt */
writel(GINTSTS_CONIDSTSCHNG, hsotg->regs + GINTSTS);
}
/**
* dwc2_handle_session_req_intr() - 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
*
* @hsotg: Programming view of DWC_otg controller
*
* This handler responds by turning on bus power. If the DWC_otg controller is
* in low power mode, this handler brings the controller out of low power mode
* before turning on bus power.
*/
static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
{
dev_dbg(hsotg->dev, "++Session Request Interrupt++\n");
/* Clear interrupt */
writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS);
usb: dwc2: gadget: rework disconnect event handling This patch adds a call to s3c_hsotg_disconnect() from 'end session' interrupt (GOTGINT_SES_END_DET) to correctly notify gadget subsystem about unplugged usb cable. DISCONNINT interrupt cannot be used for this purpose, because it is asserted only in host mode. To avoid reporting disconnect event more than once, a disconnect call has been moved from USB_REQ_SET_ADDRESS handling function to SESSREQINT interrupt. This way driver ensures that disconnect event is reported either when usb cable is unplugged or every time the host starts a new session. To handle devices which has been synthesized without SRP support, connected state is set in ENUMDONE interrupt. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-11-21 14:14:47 +00:00
/*
* Report disconnect if there is any previous session established
*/
if (dwc2_is_device_mode(hsotg))
s3c_hsotg_disconnect(hsotg);
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
}
/*
* 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.
*/
static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
{
dev_dbg(hsotg->dev, "++Resume or Remote Wakeup Detected Interrupt++\n");
dev_dbg(hsotg->dev, "%s lxstate = %d\n", __func__, hsotg->lx_state);
if (dwc2_is_device_mode(hsotg)) {
dev_dbg(hsotg->dev, "DSTS=0x%0x\n", readl(hsotg->regs + DSTS));
if (hsotg->lx_state == DWC2_L2) {
u32 dctl = readl(hsotg->regs + DCTL);
/* Clear Remote Wakeup Signaling */
dctl &= ~DCTL_RMTWKUPSIG;
writel(dctl, hsotg->regs + DCTL);
}
/* Change to L0 state */
hsotg->lx_state = DWC2_L0;
} else {
if (hsotg->lx_state != DWC2_L1) {
u32 pcgcctl = readl(hsotg->regs + PCGCTL);
/* Restart the Phy Clock */
pcgcctl &= ~PCGCTL_STOPPCLK;
writel(pcgcctl, hsotg->regs + PCGCTL);
mod_timer(&hsotg->wkp_timer,
jiffies + msecs_to_jiffies(71));
} else {
/* Change to L0 state */
hsotg->lx_state = DWC2_L0;
}
}
/* Clear interrupt */
writel(GINTSTS_WKUPINT, hsotg->regs + GINTSTS);
}
/*
* This interrupt indicates that a device has been disconnected from the
* root port
*/
static void dwc2_handle_disconnect_intr(struct dwc2_hsotg *hsotg)
{
dev_dbg(hsotg->dev, "++Disconnect Detected Interrupt++ (%s) %s\n",
dwc2_is_host_mode(hsotg) ? "Host" : "Device",
dwc2_op_state_str(hsotg));
/* Change to L3 (OFF) state */
hsotg->lx_state = DWC2_L3;
writel(GINTSTS_DISCONNINT, hsotg->regs + GINTSTS);
}
/*
* 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.
*/
static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
{
u32 dsts;
dev_dbg(hsotg->dev, "USB SUSPEND\n");
if (dwc2_is_device_mode(hsotg)) {
/*
* Check the Device status register to determine if the Suspend
* state is active
*/
dsts = readl(hsotg->regs + DSTS);
dev_dbg(hsotg->dev, "DSTS=0x%0x\n", dsts);
dev_dbg(hsotg->dev,
"DSTS.Suspend Status=%d HWCFG4.Power Optimize=%d\n",
!!(dsts & DSTS_SUSPSTS),
staging: dwc2: interpret all hwcfg and related register at init time Before, the hwcfg registers were read at device init time, but interpreted at various parts in the code. This commit unpacks the hwcfg register values into a struct with properly labeled variables at init time, which makes all the other code using these values more consise and easier to read. Some values that were previously stored in the hsotg struct are now moved into this new struct as well. In addition to the hwcfg registers, the contents of some fifo size registers are also unpacked. The hwcfg registers are read-only, so they can be safely stored. The fifo size registers are read-write registers, but their power-on values are significant: they give the maximum depth of the fifo they describe. This commit mostly moves code, but also attempts to simplify some expressions from (val >> shift) & (mask >> shift) to (val & mask) >> shift. Finally, all of the parameters read from the hardware are debug printed after unpacking them, so a bunch of debug prints can be removed from other places. Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-30 16:45:21 +00:00
hsotg->hw_params.power_optimized);
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
} else {
if (hsotg->op_state == OTG_STATE_A_PERIPHERAL) {
dev_dbg(hsotg->dev, "a_peripheral->a_host\n");
/* Clear the a_peripheral flag, back to a_host */
spin_unlock(&hsotg->lock);
dwc2_hcd_start(hsotg);
spin_lock(&hsotg->lock);
hsotg->op_state = OTG_STATE_A_HOST;
}
}
/* Change to L2 (suspend) state */
hsotg->lx_state = DWC2_L2;
/* Clear interrupt */
writel(GINTSTS_USBSUSP, hsotg->regs + GINTSTS);
}
#define GINTMSK_COMMON (GINTSTS_WKUPINT | GINTSTS_SESSREQINT | \
GINTSTS_CONIDSTSCHNG | GINTSTS_OTGINT | \
GINTSTS_MODEMIS | GINTSTS_DISCONNINT | \
staging: dwc2: remove dummy interrupt handling The handling for the IC2INT and RESTOREDONE interrupts just cleared the interrupt flag, but did not do anything else. Since these interrupts are not enabled anywhere, they should never trigger and there should never be a need to clear their flags, so we can safely remove this code. Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-25 21:39:16 +00:00
GINTSTS_USBSUSP | GINTSTS_PRTINT)
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
/*
* This function returns the Core Interrupt register
*/
static u32 dwc2_read_common_intr(struct dwc2_hsotg *hsotg)
{
u32 gintsts;
u32 gintmsk;
u32 gahbcfg;
u32 gintmsk_common = GINTMSK_COMMON;
gintsts = readl(hsotg->regs + GINTSTS);
gintmsk = readl(hsotg->regs + GINTMSK);
gahbcfg = readl(hsotg->regs + GAHBCFG);
/* If any common interrupts set */
if (gintsts & gintmsk_common)
dev_dbg(hsotg->dev, "gintsts=%08x gintmsk=%08x\n",
gintsts, gintmsk);
if (gahbcfg & GAHBCFG_GLBL_INTR_EN)
return gintsts & gintmsk & gintmsk_common;
else
return 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
* - OTG Interrupt
* - Connector ID Status Change Interrupt
* - Disconnect Interrupt
* - Session Request Interrupt
* - Resume / Remote Wakeup Detected Interrupt
* - Suspend Interrupt
*/
irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
{
struct dwc2_hsotg *hsotg = dev;
u32 gintsts;
staging: dwc2: use irq_return_t for interrupt handlers The top-level hcd interrupt handlers already used irq_return_t, but the functions to which it delegates the actual work and the common irq handler returned plain ints. In addition, they used the IRQ_RETVAL in the wrong way (but because of the values of the various constants, this didn't result in wrong behaviour). Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> [matthijs@stdin.nl: Split patch from bigger patch and added commit message] Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-25 21:39:14 +00:00
irqreturn_t retval = IRQ_NONE;
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
usb: dwc2: call dwc2_is_controller_alive() under spinlock This patch fixes the following problem: data transmission in direction IN break unless the GSNPSID register access is done with spinlock held. This issue occurs at least in Exynos4412 SoC, probably in many SoC's from Exynos familly. The problem is described here: https://lkml.org/lkml/2014/12/22/185 And there is linux mailing list discussion: https://lkml.org/lkml/2015/1/14/17 Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-01-15 11:11:36 +00:00
spin_lock(&hsotg->lock);
staging: dwc2: rename dwc2_check_core_status() Rename dwc2_check_core_status() to dwc2_is_controller_alive(), and make it a boolean function. Also change the message when the controller is dead to say "dead" instead of "disconnected". Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-11-23 00:43:51 +00:00
if (!dwc2_is_controller_alive(hsotg)) {
dev_warn(hsotg->dev, "Controller is dead\n");
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
goto out;
}
gintsts = dwc2_read_common_intr(hsotg);
if (gintsts & ~GINTSTS_PRTINT)
staging: dwc2: use irq_return_t for interrupt handlers The top-level hcd interrupt handlers already used irq_return_t, but the functions to which it delegates the actual work and the common irq handler returned plain ints. In addition, they used the IRQ_RETVAL in the wrong way (but because of the values of the various constants, this didn't result in wrong behaviour). Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> [matthijs@stdin.nl: Split patch from bigger patch and added commit message] Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-25 21:39:14 +00:00
retval = IRQ_HANDLED;
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
if (gintsts & GINTSTS_MODEMIS)
dwc2_handle_mode_mismatch_intr(hsotg);
if (gintsts & GINTSTS_OTGINT)
dwc2_handle_otg_intr(hsotg);
if (gintsts & GINTSTS_CONIDSTSCHNG)
dwc2_handle_conn_id_status_change_intr(hsotg);
if (gintsts & GINTSTS_DISCONNINT)
dwc2_handle_disconnect_intr(hsotg);
if (gintsts & GINTSTS_SESSREQINT)
dwc2_handle_session_req_intr(hsotg);
if (gintsts & GINTSTS_WKUPINT)
dwc2_handle_wakeup_detected_intr(hsotg);
if (gintsts & GINTSTS_USBSUSP)
dwc2_handle_usb_suspend_intr(hsotg);
if (gintsts & GINTSTS_PRTINT) {
/*
* The port interrupt occurs while in device mode with HPRT0
* Port Enable/Disable
*/
if (dwc2_is_device_mode(hsotg)) {
dev_dbg(hsotg->dev,
" --Port interrupt received in Device mode--\n");
usb: dwc2: handle the Host Port Interrupt when it occurs in device mode According to the spec for the DWC2 controller, when the PRTINT interrupt fires, the application must clear the appropriate status bit in the Host Port Control and Status register to clear this bit. When disconnecting an A-cable when the dwc2 host driver, the PRTINT fires, but only the GINTSTS_PRTINT status is cleared, no action is done with the HPRT0 register. The HPRT0_ENACHG bit in the HPRT0 must also be poked to correctly clear the GINTSTS_PRTINT interrupt. I am seeing this behavoir on v2.93 of the DWC2 IP. When I disconnect an OTG A-cable adapter, the PRTINT interrupt fires when the DWC2 is in device mode and is never cleared. This patch adds the function to read the HPRT0 register when the PRTINT fires and the dwc2 IP has already transitioned to device mode. This function is only clearing the HPRT0_ENACHG bit for now, but can be modified to handle more. Signed-off-by: Dinh Nguyen <dinguyen@altera.com> [ paulz: modified patch to preserve HPRT0_ENA bit ] Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-04 23:19:40 +00:00
dwc2_handle_usb_port_intr(hsotg);
retval = IRQ_HANDLED;
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
}
}
out:
usb: dwc2: call dwc2_is_controller_alive() under spinlock This patch fixes the following problem: data transmission in direction IN break unless the GSNPSID register access is done with spinlock held. This issue occurs at least in Exynos4412 SoC, probably in many SoC's from Exynos familly. The problem is described here: https://lkml.org/lkml/2014/12/22/185 And there is linux mailing list discussion: https://lkml.org/lkml/2015/1/14/17 Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-01-15 11:11:36 +00:00
spin_unlock(&hsotg->lock);
staging: dwc2: use irq_return_t for interrupt handlers The top-level hcd interrupt handlers already used irq_return_t, but the functions to which it delegates the actual work and the common irq handler returned plain ints. In addition, they used the IRQ_RETVAL in the wrong way (but because of the values of the various constants, this didn't result in wrong behaviour). Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> [matthijs@stdin.nl: Split patch from bigger patch and added commit message] Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Acked-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-25 21:39:14 +00:00
return retval;
staging: Core files for the DWC2 driver The core code provides basic services for accessing and managing the DWC_otg hardware. These services are used by both the Host Controller Driver and (in future) the Peripheral Controller Driver. Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-12 00:47:58 +00:00
}
EXPORT_SYMBOL_GPL(dwc2_handle_common_intr);
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