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Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
-rw-r--r--drivers/usb/dwc3/gadget.c2746
1 files changed, 1995 insertions, 751 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 49deaf4d98..48be74f7e9 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1,40 +1,37 @@
// SPDX-License-Identifier: GPL-2.0
-/**
+/*
* gadget.c - DesignWare USB3 DRD Controller Gadget Framework Link
*
- * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
- *
- * Taken from Linux Kernel v3.19-rc1 (drivers/usb/dwc3/gadget.c) and ported
- * to uboot.
- *
- * commit 8e74475b0e : usb: dwc3: gadget: use udc-core's reset notifier
*/
#include <common.h>
#include <dma.h>
#include <io.h>
#include <linux/list.h>
-#include <usb/gadget.h>
-#include <usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/ch9.h>
+#include "debug.h"
#include "core.h"
#include "gadget.h"
+#include "io.h"
#define DWC3_ALIGN_FRAME(d, n) (((d)->frame_number + ((d)->interval * (n))) \
& ~((d)->interval - 1))
-
/**
- * dwc3_gadget_set_test_mode - Enables USB2 Test Modes
+ * dwc3_gadget_set_test_mode - enables usb2 test modes
* @dwc: pointer to our context structure
* @mode: the mode to set (J, K SE0 NAK, Force Enable)
*
- * Caller should take care of locking. This function will
- * return 0 on success or -EINVAL if wrong Test Selector
- * is passed
+ * Caller should take care of locking. This function will return 0 on
+ * success or -EINVAL if wrong Test Selector is passed.
*/
int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
{
@@ -44,24 +41,24 @@ int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
reg &= ~DWC3_DCTL_TSTCTRL_MASK;
switch (mode) {
- case TEST_J:
- case TEST_K:
- case TEST_SE0_NAK:
- case TEST_PACKET:
- case TEST_FORCE_EN:
+ case USB_TEST_J:
+ case USB_TEST_K:
+ case USB_TEST_SE0_NAK:
+ case USB_TEST_PACKET:
+ case USB_TEST_FORCE_ENABLE:
reg |= mode << 1;
break;
default:
return -EINVAL;
}
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ dwc3_gadget_dctl_write_safe(dwc, reg);
return 0;
}
/**
- * dwc3_gadget_get_link_state - Gets current state of USB Link
+ * dwc3_gadget_get_link_state - gets current state of usb link
* @dwc: pointer to our context structure
*
* Caller should take care of locking. This function will
@@ -69,7 +66,7 @@ int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
*/
int dwc3_gadget_get_link_state(struct dwc3 *dwc)
{
- u32 reg;
+ u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
@@ -77,7 +74,7 @@ int dwc3_gadget_get_link_state(struct dwc3 *dwc)
}
/**
- * dwc3_gadget_set_link_state - Sets USB Link to a particular State
+ * dwc3_gadget_set_link_state - sets usb link to a particular state
* @dwc: pointer to our context structure
* @state: the state to put link into
*
@@ -86,14 +83,14 @@ int dwc3_gadget_get_link_state(struct dwc3 *dwc)
*/
int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)
{
- int retries = 10000;
- u32 reg;
+ int retries = 10000;
+ u32 reg;
/*
* Wait until device controller is ready. Only applies to 1.94a and
* later RTL.
*/
- if (dwc->revision >= DWC3_REVISION_194A) {
+ if (!DWC3_VER_IS_PRIOR(DWC3, 194A)) {
while (--retries) {
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
if (reg & DWC3_DSTS_DCNRD)
@@ -109,6 +106,9 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK;
+ /* set no action before sending new link state change */
+ dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+
/* set requested state */
reg |= DWC3_DCTL_ULSTCHNGREQ(state);
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
@@ -117,7 +117,7 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)
* The following code is racy when called from dwc3_gadget_wakeup,
* and is not needed, at least on newer versions
*/
- if (dwc->revision >= DWC3_REVISION_194A)
+ if (!DWC3_VER_IS_PRIOR(DWC3, 194A))
return 0;
/* wait for a change in DSTS */
@@ -131,8 +131,6 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)
udelay(5);
}
- dev_dbg(dwc->dev, "link state change request timed out\n");
-
return -ETIMEDOUT;
}
@@ -170,10 +168,9 @@ static void dwc3_ep_inc_deq(struct dwc3_ep *dep)
}
static void dwc3_gadget_del_and_unmap_request(struct dwc3_ep *dep,
- struct dwc3_request *req,
- int status)
+ struct dwc3_request *req, int status)
{
- struct dwc3 *dwc = dep->dwc;
+ struct dwc3 *dwc = dep->dwc;
list_del(&req->list);
req->remaining = 0;
@@ -182,13 +179,10 @@ static void dwc3_gadget_del_and_unmap_request(struct dwc3_ep *dep,
if (req->request.status == -EINPROGRESS)
req->request.status = status;
- if (req->request.length == 0)
- return;
-
if (req->trb)
dma_unmap_single(dwc->dev, req->request.dma,
- req->request.length,
- req->direction ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ req->request.length,
+ req->direction ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
req->trb = NULL;
}
@@ -204,18 +198,13 @@ static void dwc3_gadget_del_and_unmap_request(struct dwc3_ep *dep,
* layers that it has completed.
*/
void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
- int status)
+ int status)
{
- struct dwc3 *dwc = dep->dwc;
-
dwc3_gadget_del_and_unmap_request(dep, req, status);
- dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n",
- req, dep->name, req->request.actual,
- req->request.length, status);
req->status = DWC3_REQUEST_STATUS_COMPLETED;
spin_unlock(&dwc->lock);
- req->request.complete(&dep->endpoint, &req->request);
+ usb_gadget_giveback_request(&dep->endpoint, &req->request);
spin_lock(&dwc->lock);
}
@@ -228,12 +217,13 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
* Caller should take care of locking. Issue @cmd with a given @param to @dwc
* and wait for its completion.
*/
-int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param)
+int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned int cmd,
+ u32 param)
{
- u32 timeout = 500;
- int status = 0;
- int ret = 0;
- u32 reg;
+ u32 timeout = 500;
+ int status = 0;
+ int ret = 0;
+ u32 reg;
dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param);
dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT);
@@ -241,16 +231,11 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param)
do {
reg = dwc3_readl(dwc->regs, DWC3_DGCMD);
if (!(reg & DWC3_DGCMD_CMDACT)) {
- dev_dbg(dwc->dev, "%s: Command Complete --> %d\n",
- __func__,
- DWC3_DGCMD_STATUS(reg));
status = DWC3_DGCMD_STATUS(reg);
if (status)
ret = -EINVAL;
break;
}
-
- udelay(1);
} while (--timeout);
if (!timeout) {
@@ -262,6 +247,7 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param)
}
static int __dwc3_gadget_wakeup(struct dwc3 *dwc);
+
/**
* dwc3_send_gadget_ep_cmd - issue an endpoint command
* @dep: the endpoint to which the command is going to be issued
@@ -271,17 +257,17 @@ static int __dwc3_gadget_wakeup(struct dwc3 *dwc);
* Caller should handle locking. This function will issue @cmd with given
* @params to @dep and wait for its completion.
*/
-int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
- struct dwc3_gadget_ep_cmd_params *params)
+int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd,
+ struct dwc3_gadget_ep_cmd_params *params)
{
const struct usb_endpoint_descriptor *desc = dep->endpoint.desc;
- struct dwc3 *dwc = dep->dwc;
- u32 timeout = 1000;
- u32 saved_config = 0;
- u32 reg;
+ struct dwc3 *dwc = dep->dwc;
+ u32 timeout = 5000;
+ u32 saved_config = 0;
+ u32 reg;
- int cmd_status = 0;
- int ret = -EINVAL;
+ int cmd_status = 0;
+ int ret = -EINVAL;
/*
* When operating in USB 2.0 speeds (HS/FS), if GUSB2PHYCFG.ENBLSLPM or
@@ -293,7 +279,8 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
*
* DWC_usb3 3.30a and DWC_usb31 1.90a programming guide section 3.2.2
*/
- if (dwc->gadget.speed <= USB_SPEED_HIGH) {
+ if (dwc->gadget->speed <= USB_SPEED_HIGH ||
+ DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_ENDTRANSFER) {
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
if (unlikely(reg & DWC3_GUSB2PHYCFG_SUSPHY)) {
saved_config |= DWC3_GUSB2PHYCFG_SUSPHY;
@@ -310,21 +297,40 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
}
if (DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_STARTTRANSFER) {
- int needs_wakeup;
+ int link_state;
- needs_wakeup = (dwc->link_state == DWC3_LINK_STATE_U1 ||
- dwc->link_state == DWC3_LINK_STATE_U2 ||
- dwc->link_state == DWC3_LINK_STATE_U3);
+ /*
+ * Initiate remote wakeup if the link state is in U3 when
+ * operating in SS/SSP or L1/L2 when operating in HS/FS. If the
+ * link state is in U1/U2, no remote wakeup is needed. The Start
+ * Transfer command will initiate the link recovery.
+ */
+ link_state = dwc3_gadget_get_link_state(dwc);
+ switch (link_state) {
+ case DWC3_LINK_STATE_U2:
+ if (dwc->gadget->speed >= USB_SPEED_SUPER)
+ break;
- if (unlikely(needs_wakeup)) {
+ fallthrough;
+ case DWC3_LINK_STATE_U3:
ret = __dwc3_gadget_wakeup(dwc);
- dev_warn(dwc->dev, "wakeup failed --> %d\n", ret);
+ dev_WARN_ONCE(dwc->dev, ret, "wakeup failed --> %d\n",
+ ret);
+ break;
}
}
- dwc3_writel(dep->regs, DWC3_DEPCMDPAR0, params->param0);
- dwc3_writel(dep->regs, DWC3_DEPCMDPAR1, params->param1);
- dwc3_writel(dep->regs, DWC3_DEPCMDPAR2, params->param2);
+ /*
+ * For some commands such as Update Transfer command, DEPCMDPARn
+ * registers are reserved. Since the driver often sends Update Transfer
+ * command, don't write to DEPCMDPARn to avoid register write delays and
+ * improve performance.
+ */
+ if (DWC3_DEPCMD_CMD(cmd) != DWC3_DEPCMD_UPDATETRANSFER) {
+ dwc3_writel(dep->regs, DWC3_DEPCMDPAR0, params->param0);
+ dwc3_writel(dep->regs, DWC3_DEPCMDPAR1, params->param1);
+ dwc3_writel(dep->regs, DWC3_DEPCMDPAR2, params->param2);
+ }
/*
* Synopsys Databook 2.60a states in section 6.3.2.5.6 of that if we're
@@ -348,6 +354,14 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
cmd |= DWC3_DEPCMD_CMDACT;
dwc3_writel(dep->regs, DWC3_DEPCMD, cmd);
+
+ if (!(cmd & DWC3_DEPCMD_CMDACT) ||
+ (DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_ENDTRANSFER &&
+ !(cmd & DWC3_DEPCMD_CMDIOC))) {
+ ret = 0;
+ goto skip_status;
+ }
+
do {
reg = dwc3_readl(dep->regs, DWC3_DEPCMD);
if (!(reg & DWC3_DEPCMD_CMDACT)) {
@@ -358,6 +372,8 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
ret = 0;
break;
case DEPEVT_TRANSFER_NO_RESOURCE:
+ dev_warn(dwc->dev, "No resource for %s\n",
+ dep->name);
ret = -EINVAL;
break;
case DEPEVT_TRANSFER_BUS_EXPIRY:
@@ -387,9 +403,14 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
cmd_status = -ETIMEDOUT;
}
- if (ret == 0 && DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_STARTTRANSFER) {
- dep->flags |= DWC3_EP_TRANSFER_STARTED;
- dwc3_gadget_ep_get_transfer_index(dep);
+skip_status:
+
+ if (DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_STARTTRANSFER) {
+ if (ret == 0)
+ dep->flags |= DWC3_EP_TRANSFER_STARTED;
+
+ if (ret != -ETIMEDOUT)
+ dwc3_gadget_ep_get_transfer_index(dep);
}
if (saved_config) {
@@ -399,7 +420,6 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned cmd,
}
return ret;
-
}
static int dwc3_send_clear_stall_ep_cmd(struct dwc3_ep *dep)
@@ -416,8 +436,9 @@ static int dwc3_send_clear_stall_ep_cmd(struct dwc3_ep *dep)
* IN transfers due to a mishandled error condition. Synopsys
* STAR 9000614252.
*/
- if (dep->direction && (dwc->revision >= DWC3_REVISION_260A) &&
- (dwc->gadget.speed >= USB_SPEED_SUPER))
+ if (dep->direction &&
+ !DWC3_VER_IS_PRIOR(DWC3, 260A) &&
+ (dwc->gadget->speed >= USB_SPEED_SUPER))
cmd |= DWC3_DEPCMD_CLEARPENDIN;
memset(&params, 0, sizeof(params));
@@ -426,9 +447,9 @@ static int dwc3_send_clear_stall_ep_cmd(struct dwc3_ep *dep)
}
static dma_addr_t dwc3_trb_dma_offset(struct dwc3_ep *dep,
- struct dwc3_trb *trb)
+ struct dwc3_trb *trb)
{
- u32 offset = (char *) trb - (char *) dep->trb_pool;
+ u32 offset = (char *) trb - (char *) dep->trb_pool;
return dep->trb_pool_dma + offset;
}
@@ -438,12 +459,11 @@ static int dwc3_alloc_trb_pool(struct dwc3_ep *dep)
if (dep->trb_pool)
return 0;
- dep->trb_pool = dma_alloc_coherent(sizeof(struct dwc3_trb) *
- DWC3_TRB_NUM,
- &dep->trb_pool_dma);
+ dep->trb_pool = dma_alloc_coherent(sizeof(struct dwc3_trb) * DWC3_TRB_NUM,
+ &dep->trb_pool_dma);
if (!dep->trb_pool) {
dev_err(dep->dwc->dev, "failed to allocate trb pool for %s\n",
- dep->name);
+ dep->name);
return -ENOMEM;
}
@@ -452,7 +472,8 @@ static int dwc3_alloc_trb_pool(struct dwc3_ep *dep)
static void dwc3_free_trb_pool(struct dwc3_ep *dep)
{
- dma_free_coherent(dep->trb_pool, 0, sizeof(dma_addr_t));
+ dma_free_coherent(dep->trb_pool, dep->trb_pool_dma,
+ sizeof(struct dwc3_trb) * DWC3_TRB_NUM);
dep->trb_pool = NULL;
dep->trb_pool_dma = 0;
@@ -467,7 +488,7 @@ static int dwc3_gadget_set_xfer_resource(struct dwc3_ep *dep)
params.param0 = DWC3_DEPXFERCFG_NUM_XFER_RES(1);
return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETTRANSFRESOURCE,
- &params);
+ &params);
}
/**
@@ -506,10 +527,10 @@ static int dwc3_gadget_set_xfer_resource(struct dwc3_ep *dep)
static int dwc3_gadget_start_config(struct dwc3_ep *dep)
{
struct dwc3_gadget_ep_cmd_params params;
- struct dwc3 *dwc;
- u32 cmd;
- int i;
- int ret;
+ struct dwc3 *dwc;
+ u32 cmd;
+ int i;
+ int ret;
if (dep->number)
return 0;
@@ -552,9 +573,10 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action)
| DWC3_DEPCFG_MAX_PACKET_SIZE(usb_endpoint_maxp(desc));
/* Burst size is only needed in SuperSpeed mode */
- if (dwc->gadget.speed == USB_SPEED_SUPER) {
- u32 burst = dep->endpoint.maxburst - 1;
- params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst);
+ if (dwc->gadget->speed >= USB_SPEED_SUPER) {
+ u32 burst = dep->endpoint.maxburst;
+
+ params.param0 |= DWC3_DEPCFG_BURST_SIZE(burst - 1);
}
params.param0 |= action;
@@ -569,6 +591,7 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action)
if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) {
params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE
+ | DWC3_DEPCFG_XFER_COMPLETE_EN
| DWC3_DEPCFG_STREAM_EVENT_EN;
dep->stream_capable = true;
}
@@ -592,31 +615,239 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action)
params.param0 |= DWC3_DEPCFG_FIFO_NUMBER(dep->number >> 1);
if (desc->bInterval) {
- params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(desc->bInterval - 1);
- dep->interval = 1 << (desc->bInterval - 1);
+ u8 bInterval_m1;
+
+ /*
+ * Valid range for DEPCFG.bInterval_m1 is from 0 to 13.
+ *
+ * NOTE: The programming guide incorrectly stated bInterval_m1
+ * must be set to 0 when operating in fullspeed. Internally the
+ * controller does not have this limitation. See DWC_usb3x
+ * programming guide section 3.2.2.1.
+ */
+ bInterval_m1 = min_t(u8, desc->bInterval - 1, 13);
+
+ if (usb_endpoint_type(desc) == USB_ENDPOINT_XFER_INT &&
+ dwc->gadget->speed == USB_SPEED_FULL)
+ dep->interval = desc->bInterval;
+ else
+ dep->interval = 1 << (desc->bInterval - 1);
+
+ params.param1 |= DWC3_DEPCFG_BINTERVAL_M1(bInterval_m1);
}
return dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETEPCONFIG, &params);
}
/**
- * __dwc3_gadget_ep_enable - Initializes a HW endpoint
+ * dwc3_gadget_calc_tx_fifo_size - calculates the txfifo size value
+ * @dwc: pointer to the DWC3 context
+ * @mult: multiplier to be used when calculating the fifo_size
+ *
+ * Calculates the size value based on the equation below:
+ *
+ * DWC3 revision 280A and prior:
+ * fifo_size = mult * (max_packet / mdwidth) + 1;
+ *
+ * DWC3 revision 290A and onwards:
+ * fifo_size = mult * ((max_packet + mdwidth)/mdwidth + 1) + 1
+ *
+ * The max packet size is set to 1024, as the txfifo requirements mainly apply
+ * to super speed USB use cases. However, it is safe to overestimate the fifo
+ * allocations for other scenarios, i.e. high speed USB.
+ */
+static int dwc3_gadget_calc_tx_fifo_size(struct dwc3 *dwc, int mult)
+{
+ int max_packet = 1024;
+ int fifo_size;
+ int mdwidth;
+
+ mdwidth = dwc3_mdwidth(dwc);
+
+ /* MDWIDTH is represented in bits, we need it in bytes */
+ mdwidth >>= 3;
+
+ if (DWC3_VER_IS_PRIOR(DWC3, 290A))
+ fifo_size = mult * (max_packet / mdwidth) + 1;
+ else
+ fifo_size = mult * ((max_packet + mdwidth) / mdwidth) + 1;
+ return fifo_size;
+}
+
+/**
+ * dwc3_gadget_clear_tx_fifos - Clears txfifo allocation
+ * @dwc: pointer to the DWC3 context
+ *
+ * Iterates through all the endpoint registers and clears the previous txfifo
+ * allocations.
+ */
+void dwc3_gadget_clear_tx_fifos(struct dwc3 *dwc)
+{
+ struct dwc3_ep *dep;
+ int fifo_depth;
+ int size;
+ int num;
+
+ if (!dwc->do_fifo_resize)
+ return;
+
+ /* Read ep0IN related TXFIFO size */
+ dep = dwc->eps[1];
+ size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(0));
+ if (DWC3_IP_IS(DWC3))
+ fifo_depth = DWC3_GTXFIFOSIZ_TXFDEP(size);
+ else
+ fifo_depth = DWC31_GTXFIFOSIZ_TXFDEP(size);
+
+ dwc->last_fifo_depth = fifo_depth;
+ /* Clear existing TXFIFO for all IN eps except ep0 */
+ for (num = 3; num < min_t(int, dwc->num_eps, DWC3_ENDPOINTS_NUM);
+ num += 2) {
+ dep = dwc->eps[num];
+ /* Don't change TXFRAMNUM on usb31 version */
+ size = DWC3_IP_IS(DWC3) ? 0 :
+ dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1)) &
+ DWC31_GTXFIFOSIZ_TXFRAMNUM;
+
+ dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num >> 1), size);
+ dep->flags &= ~DWC3_EP_TXFIFO_RESIZED;
+ }
+ dwc->num_ep_resized = 0;
+}
+
+/*
+ * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case
+ * @dwc: pointer to our context structure
+ *
+ * This function will a best effort FIFO allocation in order
+ * to improve FIFO usage and throughput, while still allowing
+ * us to enable as many endpoints as possible.
+ *
+ * Keep in mind that this operation will be highly dependent
+ * on the configured size for RAM1 - which contains TxFifo -,
+ * the amount of endpoints enabled on coreConsultant tool, and
+ * the width of the Master Bus.
+ *
+ * In general, FIFO depths are represented with the following equation:
+ *
+ * fifo_size = mult * ((max_packet + mdwidth)/mdwidth + 1) + 1
+ *
+ * In conjunction with dwc3_gadget_check_config(), this resizing logic will
+ * ensure that all endpoints will have enough internal memory for one max
+ * packet per endpoint.
+ */
+static int dwc3_gadget_resize_tx_fifos(struct dwc3_ep *dep)
+{
+ struct dwc3 *dwc = dep->dwc;
+ int fifo_0_start;
+ int ram1_depth;
+ int fifo_size;
+ int min_depth;
+ int num_in_ep;
+ int remaining;
+ int num_fifos = 1;
+ int fifo;
+ int tmp;
+
+ if (!dwc->do_fifo_resize)
+ return 0;
+
+ /* resize IN endpoints except ep0 */
+ if (!usb_endpoint_dir_in(dep->endpoint.desc) || dep->number <= 1)
+ return 0;
+
+ /* bail if already resized */
+ if (dep->flags & DWC3_EP_TXFIFO_RESIZED)
+ return 0;
+
+ ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);
+
+ if ((dep->endpoint.maxburst > 1 &&
+ usb_endpoint_xfer_bulk(dep->endpoint.desc)) ||
+ usb_endpoint_xfer_isoc(dep->endpoint.desc))
+ num_fifos = 3;
+
+ if (dep->endpoint.maxburst > 6 &&
+ (usb_endpoint_xfer_bulk(dep->endpoint.desc) ||
+ usb_endpoint_xfer_isoc(dep->endpoint.desc)) && DWC3_IP_IS(DWC31))
+ num_fifos = dwc->tx_fifo_resize_max_num;
+
+ /* FIFO size for a single buffer */
+ fifo = dwc3_gadget_calc_tx_fifo_size(dwc, 1);
+
+ /* Calculate the number of remaining EPs w/o any FIFO */
+ num_in_ep = dwc->max_cfg_eps;
+ num_in_ep -= dwc->num_ep_resized;
+
+ /* Reserve at least one FIFO for the number of IN EPs */
+ min_depth = num_in_ep * (fifo + 1);
+ remaining = ram1_depth - min_depth - dwc->last_fifo_depth;
+ remaining = max_t(int, 0, remaining);
+ /*
+ * We've already reserved 1 FIFO per EP, so check what we can fit in
+ * addition to it. If there is not enough remaining space, allocate
+ * all the remaining space to the EP.
+ */
+ fifo_size = (num_fifos - 1) * fifo;
+ if (remaining < fifo_size)
+ fifo_size = remaining;
+
+ fifo_size += fifo;
+ /* Last increment according to the TX FIFO size equation */
+ fifo_size++;
+
+ /* Check if TXFIFOs start at non-zero addr */
+ tmp = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(0));
+ fifo_0_start = DWC3_GTXFIFOSIZ_TXFSTADDR(tmp);
+
+ fifo_size |= (fifo_0_start + (dwc->last_fifo_depth << 16));
+ if (DWC3_IP_IS(DWC3))
+ dwc->last_fifo_depth += DWC3_GTXFIFOSIZ_TXFDEP(fifo_size);
+ else
+ dwc->last_fifo_depth += DWC31_GTXFIFOSIZ_TXFDEP(fifo_size);
+
+ /* Check fifo size allocation doesn't exceed available RAM size. */
+ if (dwc->last_fifo_depth >= ram1_depth) {
+ dev_err(dwc->dev, "Fifosize(%d) > RAM size(%d) %s depth:%d\n",
+ dwc->last_fifo_depth, ram1_depth,
+ dep->endpoint.name, fifo_size);
+ if (DWC3_IP_IS(DWC3))
+ fifo_size = DWC3_GTXFIFOSIZ_TXFDEP(fifo_size);
+ else
+ fifo_size = DWC31_GTXFIFOSIZ_TXFDEP(fifo_size);
+
+ dwc->last_fifo_depth -= fifo_size;
+ return -ENOMEM;
+ }
+
+ dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(dep->number >> 1), fifo_size);
+ dep->flags |= DWC3_EP_TXFIFO_RESIZED;
+ dwc->num_ep_resized++;
+
+ return 0;
+}
+
+/**
+ * __dwc3_gadget_ep_enable - initializes a hw endpoint
* @dep: endpoint to be initialized
- * @desc: USB Endpoint Descriptor
+ * @action: one of INIT, MODIFY or RESTORE
*
- * Caller should take care of locking
+ * Caller should take care of locking. Execute all necessary commands to
+ * initialize a HW endpoint so it can be used by a gadget driver.
*/
static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
{
const struct usb_endpoint_descriptor *desc = dep->endpoint.desc;
- struct dwc3 *dwc = dep->dwc;
+ struct dwc3 *dwc = dep->dwc;
- u32 reg;
- int ret;
-
- dev_dbg(dwc->dev, "Enabling %s\n", dep->name);
+ u32 reg;
+ int ret;
if (!(dep->flags & DWC3_EP_ENABLED)) {
+ ret = dwc3_gadget_resize_tx_fifos(dep);
+ if (ret)
+ return ret;
+
ret = dwc3_gadget_start_config(dep);
if (ret)
return ret;
@@ -627,8 +858,8 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
return ret;
if (!(dep->flags & DWC3_EP_ENABLED)) {
- struct dwc3_trb *trb_st_hw;
- struct dwc3_trb *trb_link;
+ struct dwc3_trb *trb_st_hw;
+ struct dwc3_trb *trb_link;
dep->type = usb_endpoint_type(desc);
dep->flags |= DWC3_EP_ENABLED;
@@ -637,12 +868,13 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
reg |= DWC3_DALEPENA_EP(dep->number);
dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);
+ dep->trb_dequeue = 0;
+ dep->trb_enqueue = 0;
+
if (usb_endpoint_xfer_control(desc))
- return 0;
+ goto out;
/* Initialize the TRB ring */
- dep->trb_dequeue = 0;
- dep->trb_enqueue = 0;
memset_io(dep->trb_pool, 0,
sizeof(struct dwc3_trb) * DWC3_TRB_NUM);
@@ -650,12 +882,8 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
trb_st_hw = &dep->trb_pool[0];
trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1];
- memset_io(trb_link, 0, sizeof(*trb_link));
-
- trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep,
- trb_st_hw));
- trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep,
- trb_st_hw));
+ trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw));
+ trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw));
trb_link->ctrl |= DWC3_TRBCTL_LINK_TRB;
trb_link->ctrl |= DWC3_TRB_CTRL_HWO;
}
@@ -664,10 +892,10 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
* Issue StartTransfer here with no-op TRB so we can always rely on No
* Response Update Transfer command.
*/
- if ((usb_endpoint_xfer_bulk(desc) && !dep->stream_capable) ||
+ if (usb_endpoint_xfer_bulk(desc) ||
usb_endpoint_xfer_int(desc)) {
struct dwc3_gadget_ep_cmd_params params;
- struct dwc3_trb *trb;
+ struct dwc3_trb *trb;
dma_addr_t trb_dma;
u32 cmd;
@@ -683,47 +911,88 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
ret = dwc3_send_gadget_ep_cmd(dep, cmd, &params);
if (ret < 0)
return ret;
+
+ if (dep->stream_capable) {
+ /*
+ * For streams, at start, there maybe a race where the
+ * host primes the endpoint before the function driver
+ * queues a request to initiate a stream. In that case,
+ * the controller will not see the prime to generate the
+ * ERDY and start stream. To workaround this, issue a
+ * no-op TRB as normal, but end it immediately. As a
+ * result, when the function driver queues the request,
+ * the next START_TRANSFER command will cause the
+ * controller to generate an ERDY to initiate the
+ * stream.
+ */
+ dwc3_stop_active_transfer(dep, true, true);
+
+ /*
+ * All stream eps will reinitiate stream on NoStream
+ * rejection until we can determine that the host can
+ * prime after the first transfer.
+ *
+ * However, if the controller is capable of
+ * TXF_FLUSH_BYPASS, then IN direction endpoints will
+ * automatically restart the stream without the driver
+ * initiation.
+ */
+ if (!dep->direction ||
+ !(dwc->hwparams.hwparams9 &
+ DWC3_GHWPARAMS9_DEV_TXF_FLUSH_BYPASS))
+ dep->flags |= DWC3_EP_FORCE_RESTART_STREAM;
+ }
}
+out:
return 0;
}
-static void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force,
- bool interrupt);
-static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep)
+void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep, int status)
{
- struct dwc3_request *req;
+ struct dwc3_request *req;
dwc3_stop_active_transfer(dep, true, false);
+ /* If endxfer is delayed, avoid unmapping requests */
+ if (dep->flags & DWC3_EP_DELAY_STOP)
+ return;
+
/* - giveback all requests to gadget driver */
while (!list_empty(&dep->started_list)) {
req = next_request(&dep->started_list);
- dwc3_gadget_giveback(dep, req, -ESHUTDOWN);
+ dwc3_gadget_giveback(dep, req, status);
}
while (!list_empty(&dep->pending_list)) {
req = next_request(&dep->pending_list);
- dwc3_gadget_giveback(dep, req, -ESHUTDOWN);
+ dwc3_gadget_giveback(dep, req, status);
+ }
+
+ while (!list_empty(&dep->cancelled_list)) {
+ req = next_request(&dep->cancelled_list);
+
+ dwc3_gadget_giveback(dep, req, status);
}
}
/**
- * __dwc3_gadget_ep_disable - Disables a HW endpoint
+ * __dwc3_gadget_ep_disable - disables a hw endpoint
* @dep: the endpoint to disable
*
- * This function also removes requests which are currently processed ny the
- * hardware and those which are not yet scheduled.
+ * This function undoes what __dwc3_gadget_ep_enable did and also removes
+ * requests which are currently being processed by the hardware and those which
+ * are not yet scheduled.
+ *
* Caller should take care of locking.
*/
static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
{
- struct dwc3 *dwc = dep->dwc;
- u32 reg;
-
- dwc3_remove_requests(dwc, dep);
+ struct dwc3 *dwc = dep->dwc;
+ u32 reg;
+ u32 mask;
/* make sure HW endpoint isn't stalled */
if (dep->flags & DWC3_EP_STALL)
@@ -733,9 +1002,19 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
reg &= ~DWC3_DALEPENA_EP(dep->number);
dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);
+ dwc3_remove_requests(dwc, dep, -ESHUTDOWN);
+
dep->stream_capable = false;
dep->type = 0;
- dep->flags = 0;
+ mask = DWC3_EP_TXFIFO_RESIZED;
+ /*
+ * dwc3_remove_requests() can exit early if DWC3 EP delayed stop is
+ * set. Do not clear DEP flags, so that the end transfer command will
+ * be reattempted during the next SETUP stage.
+ */
+ if (dep->flags & DWC3_EP_DELAY_STOP)
+ mask |= (DWC3_EP_DELAY_STOP | DWC3_EP_TRANSFER_STARTED);
+ dep->flags &= mask;
/* Clear out the ep descriptors for non-ep0 */
if (dep->number > 1) {
@@ -749,7 +1028,7 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
/* -------------------------------------------------------------------------- */
static int dwc3_gadget_ep0_enable(struct usb_ep *ep,
- const struct usb_endpoint_descriptor *desc)
+ const struct usb_endpoint_descriptor *desc)
{
return -EINVAL;
}
@@ -762,12 +1041,12 @@ static int dwc3_gadget_ep0_disable(struct usb_ep *ep)
/* -------------------------------------------------------------------------- */
static int dwc3_gadget_ep_enable(struct usb_ep *ep,
- const struct usb_endpoint_descriptor *desc)
+ const struct usb_endpoint_descriptor *desc)
{
- struct dwc3_ep *dep;
- struct dwc3 *dwc;
- unsigned long flags;
- int ret;
+ struct dwc3_ep *dep;
+ struct dwc3 *dwc;
+ unsigned long flags;
+ int ret;
if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {
pr_debug("dwc3: invalid parameters\n");
@@ -782,11 +1061,10 @@ static int dwc3_gadget_ep_enable(struct usb_ep *ep,
dep = to_dwc3_ep(ep);
dwc = dep->dwc;
- if (dep->flags & DWC3_EP_ENABLED) {
- WARN(true, "%s is already enabled\n",
- dep->name);
+ if (dev_WARN_ONCE(dwc->dev, dep->flags & DWC3_EP_ENABLED,
+ "%s is already enabled\n",
+ dep->name))
return 0;
- }
spin_lock_irqsave(&dwc->lock, flags);
ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT);
@@ -797,10 +1075,10 @@ static int dwc3_gadget_ep_enable(struct usb_ep *ep,
static int dwc3_gadget_ep_disable(struct usb_ep *ep)
{
- struct dwc3_ep *dep;
- struct dwc3 *dwc;
- unsigned long flags;
- int ret;
+ struct dwc3_ep *dep;
+ struct dwc3 *dwc;
+ unsigned long flags;
+ int ret;
if (!ep) {
pr_debug("dwc3: invalid parameters\n");
@@ -810,11 +1088,10 @@ static int dwc3_gadget_ep_disable(struct usb_ep *ep)
dep = to_dwc3_ep(ep);
dwc = dep->dwc;
- if (!(dep->flags & DWC3_EP_ENABLED)) {
- WARN(true, "%s is already disabled\n",
- dep->name);
+ if (dev_WARN_ONCE(dwc->dev, !(dep->flags & DWC3_EP_ENABLED),
+ "%s is already disabled\n",
+ dep->name))
return 0;
- }
spin_lock_irqsave(&dwc->lock, flags);
ret = __dwc3_gadget_ep_disable(dep);
@@ -825,10 +1102,10 @@ static int dwc3_gadget_ep_disable(struct usb_ep *ep)
static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep)
{
- struct dwc3_request *req;
- struct dwc3_ep *dep = to_dwc3_ep(ep);
+ struct dwc3_request *req;
+ struct dwc3_ep *dep = to_dwc3_ep(ep);
- req = xzalloc(sizeof(*req));
+ req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return NULL;
@@ -841,9 +1118,9 @@ static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep)
}
static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
- struct usb_request *request)
+ struct usb_request *request)
{
- struct dwc3_request *req = to_dwc3_request(request);
+ struct dwc3_request *req = to_dwc3_request(request);
kfree(req);
}
@@ -869,19 +1146,19 @@ static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index)
static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
{
- struct dwc3_trb *tmp;
- u8 trbs_left;
+ u8 trbs_left;
/*
- * If enqueue & dequeue are equal than it is either full or empty.
- *
- * One way to know for sure is if the TRB right before us has HWO bit
- * set or not. If it has, then we're definitely full and can't fit any
- * more transfers in our ring.
+ * If the enqueue & dequeue are equal then the TRB ring is either full
+ * or empty. It's considered full when there are DWC3_TRB_NUM-1 of TRBs
+ * pending to be processed by the driver.
*/
if (dep->trb_enqueue == dep->trb_dequeue) {
- tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue);
- if (tmp->ctrl & DWC3_TRB_CTRL_HWO)
+ /*
+ * If there is any request remained in the started_list at
+ * this point, that means there is no TRB available.
+ */
+ if (!list_empty(&dep->started_list))
return 0;
return DWC3_TRB_NUM - 1;
@@ -896,17 +1173,47 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
return trbs_left;
}
-static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
- dma_addr_t dma, unsigned length,
- unsigned chain, unsigned node,
- unsigned stream_id, unsigned short_not_ok,
- unsigned no_interrupt)
+/**
+ * dwc3_prepare_one_trb - setup one TRB from one request
+ * @dep: endpoint for which this request is prepared
+ * @req: dwc3_request pointer
+ * @trb_length: buffer size of the TRB
+ * @chain: should this TRB be chained to the next?
+ * @node: only for isochronous endpoints. First TRB needs different type.
+ * @use_bounce_buffer: set to use bounce buffer
+ * @must_interrupt: set to interrupt on TRB completion
+ */
+static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
+ struct dwc3_request *req, unsigned int trb_length,
+ unsigned int chain, unsigned int node, bool use_bounce_buffer,
+ bool must_interrupt)
{
- struct dwc3 *dwc = dep->dwc;
- struct usb_gadget *gadget = &dwc->gadget;
- enum usb_device_speed speed = gadget->speed;
+ struct dwc3_trb *trb;
+ dma_addr_t dma;
+ unsigned int stream_id = req->request.stream_id;
+ unsigned int short_not_ok = req->request.short_not_ok;
+ unsigned int no_interrupt = req->request.no_interrupt;
+ unsigned int is_last = req->request.is_last;
+ struct dwc3 *dwc = dep->dwc;
+ struct usb_gadget *gadget = dwc->gadget;
+ enum usb_device_speed speed = gadget->speed;
+
+ if (use_bounce_buffer)
+ dma = dep->dwc->bounce_addr;
+ else
+ dma = req->request.dma;
+
+ trb = &dep->trb_pool[dep->trb_enqueue];
- trb->size = DWC3_TRB_SIZE_LENGTH(length);
+ if (!req->trb) {
+ dwc3_gadget_move_started_request(req);
+ req->trb = trb;
+ req->trb_dma = dwc3_trb_dma_offset(dep, trb);
+ }
+
+ req->num_trbs++;
+
+ trb->size = DWC3_TRB_SIZE_LENGTH(trb_length);
trb->bpl = lower_32_bits(dma);
trb->bph = upper_32_bits(dma);
@@ -946,10 +1253,10 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
unsigned int mult = 2;
unsigned int maxp = usb_endpoint_maxp(ep->desc);
- if (length <= (2 * maxp))
+ if (req->request.length <= (2 * maxp))
mult--;
- if (length <= maxp)
+ if (req->request.length <= maxp)
mult--;
trb->size |= DWC3_TRB_SIZE_PCM1(mult);
@@ -958,8 +1265,8 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS;
}
- /* always enable Interrupt on Missed ISOC */
- trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
+ if (!no_interrupt && !chain)
+ trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
break;
case USB_ENDPOINT_XFER_BULK:
@@ -972,7 +1279,7 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
* checked it already :)
*/
dev_warn(dwc->dev, "Unknown endpoint type %d\n",
- usb_endpoint_type(dep->endpoint.desc));
+ usb_endpoint_type(dep->endpoint.desc));
}
/*
@@ -987,149 +1294,197 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
}
- if ((!no_interrupt && !chain) ||
- (dwc3_calc_trbs_left(dep) == 1))
+ /* All TRBs setup for MST must set CSP=1 when LST=0 */
+ if (dep->stream_capable && DWC3_MST_CAPABLE(&dwc->hwparams))
+ trb->ctrl |= DWC3_TRB_CTRL_CSP;
+
+ if ((!no_interrupt && !chain) || must_interrupt)
trb->ctrl |= DWC3_TRB_CTRL_IOC;
if (chain)
trb->ctrl |= DWC3_TRB_CTRL_CHN;
+ else if (dep->stream_capable && is_last &&
+ !DWC3_MST_CAPABLE(&dwc->hwparams))
+ trb->ctrl |= DWC3_TRB_CTRL_LST;
if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable)
trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(stream_id);
+ /*
+ * As per data book 4.2.3.2TRB Control Bit Rules section
+ *
+ * The controller autonomously checks the HWO field of a TRB to determine if the
+ * entire TRB is valid. Therefore, software must ensure that the rest of the TRB
+ * is valid before setting the HWO field to '1'. In most systems, this means that
+ * software must update the fourth DWORD of a TRB last.
+ *
+ * However there is a possibility of CPU re-ordering here which can cause
+ * controller to observe the HWO bit set prematurely.
+ * Add a write memory barrier to prevent CPU re-ordering.
+ */
+ /* wmb() FIXME */
trb->ctrl |= DWC3_TRB_CTRL_HWO;
dwc3_ep_inc_enq(dep);
}
-/**
- * dwc3_prepare_one_trb - setup one TRB from one request
- * @dep: endpoint for which this request is prepared
- * @req: dwc3_request pointer
- * @chain: should this TRB be chained to the next?
- * @node: only for isochronous endpoints. First TRB needs different type.
- */
-static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
- struct dwc3_request *req,
- unsigned chain, unsigned node)
+static bool dwc3_needs_extra_trb(struct dwc3_ep *dep, struct dwc3_request *req)
{
- struct dwc3_trb *trb;
- unsigned int length;
- dma_addr_t dma;
- unsigned stream_id = req->request.stream_id;
- unsigned short_not_ok = req->request.short_not_ok;
- unsigned no_interrupt = req->request.no_interrupt;
-
- length = req->request.length;
- dma = req->request.dma;
-
- trb = &dep->trb_pool[dep->trb_enqueue];
-
- if (!req->trb) {
- dwc3_gadget_move_started_request(req);
- req->trb = trb;
- req->trb_dma = dwc3_trb_dma_offset(dep, trb);
- }
+ unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
+ unsigned int rem = req->request.length % maxp;
- req->num_trbs++;
+ if ((req->request.length && req->request.zero && !rem &&
+ !usb_endpoint_xfer_isoc(dep->endpoint.desc)) ||
+ (!req->direction && rem))
+ return true;
- __dwc3_prepare_one_trb(dep, trb, dma, length, chain, node,
- stream_id, short_not_ok, no_interrupt);
+ return false;
}
-static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
- struct dwc3_request *req)
+/**
+ * dwc3_prepare_last_sg - prepare TRBs for the last SG entry
+ * @dep: The endpoint that the request belongs to
+ * @req: The request to prepare
+ * @entry_length: The last SG entry size
+ * @node: Indicates whether this is not the first entry (for isoc only)
+ *
+ * Return the number of TRBs prepared.
+ */
+static int dwc3_prepare_last_sg(struct dwc3_ep *dep,
+ struct dwc3_request *req, unsigned int entry_length,
+ unsigned int node)
{
- unsigned int length = req->request.length;
unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
- unsigned int rem = length % maxp;
+ unsigned int rem = req->request.length % maxp;
+ unsigned int num_trbs = 1;
- if ((!length || rem) && usb_endpoint_dir_out(dep->endpoint.desc)) {
- struct dwc3 *dwc = dep->dwc;
- struct dwc3_trb *trb;
+ if (dwc3_needs_extra_trb(dep, req))
+ num_trbs++;
- req->needs_extra_trb = true;
+ if (dwc3_calc_trbs_left(dep) < num_trbs)
+ return 0;
- /* prepare normal TRB */
- dwc3_prepare_one_trb(dep, req, true, 0);
+ req->needs_extra_trb = num_trbs > 1;
- /* Now prepare one extra TRB to align transfer size */
- trb = &dep->trb_pool[dep->trb_enqueue];
- req->num_trbs++;
- __dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, maxp - rem,
- false, 1, req->request.stream_id,
- req->request.short_not_ok,
- req->request.no_interrupt);
- } else if (req->request.zero && req->request.length &&
- (IS_ALIGNED(req->request.length, maxp))) {
- struct dwc3 *dwc = dep->dwc;
- struct dwc3_trb *trb;
+ /* Prepare a normal TRB */
+ if (req->direction || req->request.length)
+ dwc3_prepare_one_trb(dep, req, entry_length,
+ req->needs_extra_trb, node, false, false);
- req->needs_extra_trb = true;
+ /* Prepare extra TRBs for ZLP and MPS OUT transfer alignment */
+ if ((!req->direction && !req->request.length) || req->needs_extra_trb)
+ dwc3_prepare_one_trb(dep, req,
+ req->direction ? 0 : maxp - rem,
+ false, 1, true, false);
- /* prepare normal TRB */
- dwc3_prepare_one_trb(dep, req, true, 0);
+ return num_trbs;
+}
- /* Now prepare one extra TRB to handle ZLP */
- trb = &dep->trb_pool[dep->trb_enqueue];
- req->num_trbs++;
- __dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, 0,
- false, 1, req->request.stream_id,
- req->request.short_not_ok,
- req->request.no_interrupt);
- } else {
- dwc3_prepare_one_trb(dep, req, false, 0);
- }
+static int dwc3_prepare_trbs_linear(struct dwc3_ep *dep,
+ struct dwc3_request *req)
+{
+ return dwc3_prepare_last_sg(dep, req, req->request.length, 0);
}
/*
* dwc3_prepare_trbs - setup TRBs from requests
* @dep: endpoint for which requests are being prepared
- * @starting: true if the endpoint is idle and no requests are queued.
*
* The function goes through the requests list and sets up TRBs for the
* transfers. The function returns once there are no more TRBs available or
* it runs out of requests.
+ *
+ * Returns the number of TRBs prepared or negative errno.
*/
-static void dwc3_prepare_trbs(struct dwc3_ep *dep)
+static int dwc3_prepare_trbs(struct dwc3_ep *dep)
{
- struct dwc3_request *req, *n;
- struct dwc3 *dwc = dep->dwc;
- dma_addr_t dma_addr;
+ struct dwc3_request *req, *n;
+ int ret = 0;
BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM);
+ /*
+ * We can get in a situation where there's a request in the started list
+ * but there weren't enough TRBs to fully kick it in the first time
+ * around, so it has been waiting for more TRBs to be freed up.
+ *
+ * In that case, we should check if we have a request with pending_sgs
+ * in the started list and prepare TRBs for that request first,
+ * otherwise we will prepare TRBs completely out of order and that will
+ * break things.
+ */
+ list_for_each_entry(req, &dep->started_list, list) {
+ if (!dwc3_calc_trbs_left(dep))
+ return ret;
+
+ /*
+ * Don't prepare beyond a transfer. In DWC_usb32, its transfer
+ * burst capability may try to read and use TRBs beyond the
+ * active transfer instead of stopping.
+ */
+ if (dep->stream_capable && req->request.is_last &&
+ !DWC3_MST_CAPABLE(&dep->dwc->hwparams))
+ return ret;
+ }
+
list_for_each_entry_safe(req, n, &dep->pending_list, list) {
- dma_addr = dma_map_single(dwc->dev, req->request.buf,
- req->request.length,
- dep->number ?
- DMA_TO_DEVICE : DMA_FROM_DEVICE);
- if (dma_mapping_error(dwc->dev, dma_addr))
- return;
+ struct dwc3 *dwc = dep->dwc;
- req->request.dma = dma_addr;
+ ret = usb_gadget_map_request_by_dev(dwc->sysdev, &req->request,
+ dep->direction);
+ if (ret)
+ return ret;
- dwc3_prepare_one_trb_linear(dep, req);
+ req->sg = req->request.sg;
+ req->start_sg = req->sg;
+ req->num_queued_sgs = 0;
+ req->num_pending_sgs = req->request.num_mapped_sgs;
- if (!dwc3_calc_trbs_left(dep))
- return;
+ ret = dwc3_prepare_trbs_linear(dep, req);
+
+ if (!ret || !dwc3_calc_trbs_left(dep))
+ return ret;
+
+ /*
+ * Don't prepare beyond a transfer. In DWC_usb32, its transfer
+ * burst capability may try to read and use TRBs beyond the
+ * active transfer instead of stopping.
+ */
+ if (dep->stream_capable && req->request.is_last &&
+ !DWC3_MST_CAPABLE(&dwc->hwparams))
+ return ret;
}
+
+ return ret;
}
+static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep);
+
static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep)
{
struct dwc3_gadget_ep_cmd_params params;
- struct dwc3_request *req;
- int starting;
- int ret;
- u32 cmd;
+ struct dwc3_request *req;
+ int starting;
+ int ret;
+ u32 cmd;
- if (!dwc3_calc_trbs_left(dep))
- return 0;
+ /*
+ * Note that it's normal to have no new TRBs prepared (i.e. ret == 0).
+ * This happens when we need to stop and restart a transfer such as in
+ * the case of reinitiating a stream or retrying an isoc transfer.
+ */
+ ret = dwc3_prepare_trbs(dep);
+ if (ret < 0)
+ return ret;
starting = !(dep->flags & DWC3_EP_TRANSFER_STARTED);
- dwc3_prepare_trbs(dep);
+ /*
+ * If there's no new TRB prepared and we don't need to restart a
+ * transfer, there's no need to update the transfer.
+ */
+ if (!ret && !starting)
+ return ret;
req = next_request(&dep->started_list);
if (!req) {
@@ -1156,29 +1511,84 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep)
ret = dwc3_send_gadget_ep_cmd(dep, cmd, &params);
if (ret < 0) {
- /*
- * FIXME we need to iterate over the list of requests
- * here and stop, unmap, free and del each of the linked
- * requests instead of what we do now.
- */
- if (req->trb)
- memset(req->trb, 0, sizeof(struct dwc3_trb));
- dwc3_gadget_del_and_unmap_request(dep, req, ret);
+ struct dwc3_request *tmp;
+
+ if (ret == -EAGAIN)
+ return ret;
+
+ dwc3_stop_active_transfer(dep, true, true);
+
+ list_for_each_entry_safe(req, tmp, &dep->started_list, list)
+ dwc3_gadget_move_cancelled_request(req, DWC3_REQUEST_STATUS_DEQUEUED);
+
+ /* If ep isn't started, then there's no end transfer pending */
+ if (!(dep->flags & DWC3_EP_END_TRANSFER_PENDING))
+ dwc3_gadget_ep_cleanup_cancelled_requests(dep);
+
return ret;
}
+ if (dep->stream_capable && req->request.is_last &&
+ !DWC3_MST_CAPABLE(&dep->dwc->hwparams))
+ dep->flags |= DWC3_EP_WAIT_TRANSFER_COMPLETE;
+
return 0;
}
static int __dwc3_gadget_get_frame(struct dwc3 *dwc)
{
- u32 reg;
+ u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
return DWC3_DSTS_SOFFN(reg);
}
/**
+ * __dwc3_stop_active_transfer - stop the current active transfer
+ * @dep: isoc endpoint
+ * @force: set forcerm bit in the command
+ * @interrupt: command complete interrupt after End Transfer command
+ *
+ * When setting force, the ForceRM bit will be set. In that case
+ * the controller won't update the TRB progress on command
+ * completion. It also won't clear the HWO bit in the TRB.
+ * The command will also not complete immediately in that case.
+ */
+static int __dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force, bool interrupt)
+{
+ struct dwc3_gadget_ep_cmd_params params;
+ u32 cmd;
+ int ret;
+
+ cmd = DWC3_DEPCMD_ENDTRANSFER;
+ cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0;
+ cmd |= interrupt ? DWC3_DEPCMD_CMDIOC : 0;
+ cmd |= DWC3_DEPCMD_PARAM(dep->resource_index);
+ memset(&params, 0, sizeof(params));
+ ret = dwc3_send_gadget_ep_cmd(dep, cmd, &params);
+ /*
+ * If the End Transfer command was timed out while the device is
+ * not in SETUP phase, it's possible that an incoming Setup packet
+ * may prevent the command's completion. Let's retry when the
+ * ep0state returns to EP0_SETUP_PHASE.
+ */
+ if (ret == -ETIMEDOUT && dep->dwc->ep0state != EP0_SETUP_PHASE) {
+ dep->flags |= DWC3_EP_DELAY_STOP;
+ return 0;
+ }
+ WARN_ON_ONCE(ret);
+ dep->resource_index = 0;
+
+ if (!interrupt)
+ dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
+ else if (!ret)
+ dep->flags |= DWC3_EP_END_TRANSFER_PENDING;
+
+ dep->flags &= ~DWC3_EP_DELAY_STOP;
+ return ret;
+}
+
+/**
* dwc3_gadget_start_isoc_quirk - workaround invalid frame number
* @dep: isoc endpoint
*
@@ -1235,7 +1645,7 @@ static int dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
* Check if we can start isoc transfer on the next interval or
* 4 uframes in the future with BIT[15:14] as dep->combo_num
*/
- test_frame_number = dep->frame_number & 0x3fff;
+ test_frame_number = dep->frame_number & DWC3_FRNUMBER_MASK;
test_frame_number |= dep->combo_num << 14;
test_frame_number += max_t(u32, 4, dep->interval);
@@ -1282,7 +1692,7 @@ static int dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
else if (test0 && test1)
dep->combo_num = 0;
- dep->frame_number &= 0x3fff;
+ dep->frame_number &= DWC3_FRNUMBER_MASK;
dep->frame_number |= dep->combo_num << 14;
dep->frame_number += max_t(u32, 4, dep->interval);
@@ -1295,63 +1705,110 @@ static int dwc3_gadget_start_isoc_quirk(struct dwc3_ep *dep)
static int __dwc3_gadget_start_isoc(struct dwc3_ep *dep)
{
+ const struct usb_endpoint_descriptor *desc = dep->endpoint.desc;
struct dwc3 *dwc = dep->dwc;
int ret;
int i;
- if (list_empty(&dep->pending_list)) {
+ if (list_empty(&dep->pending_list) &&
+ list_empty(&dep->started_list)) {
dep->flags |= DWC3_EP_PENDING_REQUEST;
return -EAGAIN;
}
- if (!dwc->dis_start_transfer_quirk && dwc3_is_usb31(dwc) &&
- (dwc->revision <= DWC3_USB31_REVISION_160A ||
- (dwc->revision == DWC3_USB31_REVISION_170A &&
- dwc->version_type >= DWC31_VERSIONTYPE_EA01 &&
- dwc->version_type <= DWC31_VERSIONTYPE_EA06))) {
-
- if (dwc->gadget.speed <= USB_SPEED_HIGH && dep->direction)
+ if (!dwc->dis_start_transfer_quirk &&
+ (DWC3_VER_IS_PRIOR(DWC31, 170A) ||
+ DWC3_VER_TYPE_IS_WITHIN(DWC31, 170A, EA01, EA06))) {
+ if (dwc->gadget->speed <= USB_SPEED_HIGH && dep->direction)
return dwc3_gadget_start_isoc_quirk(dep);
}
+ if (desc->bInterval <= 14 &&
+ dwc->gadget->speed >= USB_SPEED_HIGH) {
+ u32 frame = __dwc3_gadget_get_frame(dwc);
+ bool rollover = frame <
+ (dep->frame_number & DWC3_FRNUMBER_MASK);
+
+ /*
+ * frame_number is set from XferNotReady and may be already
+ * out of date. DSTS only provides the lower 14 bit of the
+ * current frame number. So add the upper two bits of
+ * frame_number and handle a possible rollover.
+ * This will provide the correct frame_number unless more than
+ * rollover has happened since XferNotReady.
+ */
+
+ dep->frame_number = (dep->frame_number & ~DWC3_FRNUMBER_MASK) |
+ frame;
+ if (rollover)
+ dep->frame_number += BIT(14);
+ }
+
for (i = 0; i < DWC3_ISOC_MAX_RETRIES; i++) {
- dep->frame_number = DWC3_ALIGN_FRAME(dep, i + 1);
+ int future_interval = i + 1;
+
+ /* Give the controller at least 500us to schedule transfers */
+ if (desc->bInterval < 3)
+ future_interval += 3 - desc->bInterval;
+
+ dep->frame_number = DWC3_ALIGN_FRAME(dep, future_interval);
ret = __dwc3_gadget_kick_transfer(dep);
if (ret != -EAGAIN)
break;
}
+ /*
+ * After a number of unsuccessful start attempts due to bus-expiry
+ * status, issue END_TRANSFER command and retry on the next XferNotReady
+ * event.
+ */
+ if (ret == -EAGAIN)
+ ret = __dwc3_stop_active_transfer(dep, false, true);
+
return ret;
}
static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
{
- struct dwc3 *dwc = dep->dwc;
+ struct dwc3 *dwc = dep->dwc;
- if (!dep->endpoint.desc) {
- dev_err(dwc->dev, "%s: can't queue to disabled endpoint\n",
+ if (!dep->endpoint.desc || !dwc->pullups_connected || !dwc->connected) {
+ dev_dbg(dwc->dev, "%s: can't queue to disabled endpoint\n",
dep->name);
return -ESHUTDOWN;
}
- if (req->dep != dep) {
- WARN(true, "request %p belongs to '%s'\n",
- &req->request, req->dep->name);
+ if (WARN(req->dep != dep, "request %pK belongs to '%s'\n",
+ &req->request, req->dep->name))
return -EINVAL;
- }
- if (req->status < DWC3_REQUEST_STATUS_COMPLETED) {
- WARN(true, "request %p already in flight\n", &req->request);
+ if (WARN(req->status < DWC3_REQUEST_STATUS_COMPLETED,
+ "%s: request %pK already in flight\n",
+ dep->name, &req->request))
return -EINVAL;
- }
- req->request.actual = 0;
- req->request.status = -EINPROGRESS;
+ req->request.actual = 0;
+ req->request.status = -EINPROGRESS;
list_add_tail(&req->list, &dep->pending_list);
req->status = DWC3_REQUEST_STATUS_QUEUED;
+ if (dep->flags & DWC3_EP_WAIT_TRANSFER_COMPLETE)
+ return 0;
+
+ /*
+ * Start the transfer only after the END_TRANSFER is completed
+ * and endpoint STALL is cleared.
+ */
+ if ((dep->flags & DWC3_EP_END_TRANSFER_PENDING) ||
+ (dep->flags & DWC3_EP_WEDGE) ||
+ (dep->flags & DWC3_EP_DELAY_STOP) ||
+ (dep->flags & DWC3_EP_STALL)) {
+ dep->flags |= DWC3_EP_DELAY_START;
+ return 0;
+ }
+
/*
* NOTICE: Isochronous endpoints should NEVER be prestarted. We must
* wait for a XferNotReady event so we will know what's the current
@@ -1361,28 +1818,27 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
* errors which will force us issue EndTransfer command.
*/
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
- if (!(dep->flags & DWC3_EP_PENDING_REQUEST) &&
- !(dep->flags & DWC3_EP_TRANSFER_STARTED))
- return 0;
-
- if ((dep->flags & DWC3_EP_PENDING_REQUEST)) {
- if (!(dep->flags & DWC3_EP_TRANSFER_STARTED)) {
+ if (!(dep->flags & DWC3_EP_TRANSFER_STARTED)) {
+ if ((dep->flags & DWC3_EP_PENDING_REQUEST))
return __dwc3_gadget_start_isoc(dep);
- }
+
+ return 0;
}
}
- return __dwc3_gadget_kick_transfer(dep);
+ __dwc3_gadget_kick_transfer(dep);
+
+ return 0;
}
static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request)
{
- struct dwc3_request *req = to_dwc3_request(request);
- struct dwc3_ep *dep = to_dwc3_ep(ep);
+ struct dwc3_request *req = to_dwc3_request(request);
+ struct dwc3_ep *dep = to_dwc3_ep(ep);
- unsigned long flags;
+ unsigned long flags;
- int ret;
+ int ret;
spin_lock_irqsave(&dwc->lock, flags);
ret = __dwc3_gadget_ep_queue(dep, req);
@@ -1391,11 +1847,14 @@ static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request)
return ret;
}
-static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep,
- struct dwc3_request *req)
+static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep, struct dwc3_request *req)
{
int i;
+ /* If req->trb is not set, then the request has not started */
+ if (!req->trb)
+ return;
+
/*
* If request was already started, this means we had to
* stop the transfer. With that we also need to ignore
@@ -1409,7 +1868,7 @@ static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep,
for (i = 0; i < req->num_trbs; i++) {
struct dwc3_trb *trb;
- trb = req->trb + i;
+ trb = &dep->trb_pool[dep->trb_dequeue];
trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
dwc3_ep_inc_deq(dep);
}
@@ -1419,61 +1878,87 @@ static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep,
static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep)
{
- struct dwc3_request *req;
- struct dwc3_request *tmp;
+ struct dwc3_request *req;
+ struct dwc3 *dwc = dep->dwc;
- list_for_each_entry_safe(req, tmp, &dep->cancelled_list, list) {
+ while (!list_empty(&dep->cancelled_list)) {
+ req = next_request(&dep->cancelled_list);
dwc3_gadget_ep_skip_trbs(dep, req);
- dwc3_gadget_giveback(dep, req, -ECONNRESET);
+ switch (req->status) {
+ case DWC3_REQUEST_STATUS_DISCONNECTED:
+ dwc3_gadget_giveback(dep, req, -ESHUTDOWN);
+ break;
+ case DWC3_REQUEST_STATUS_DEQUEUED:
+ dwc3_gadget_giveback(dep, req, -ECONNRESET);
+ break;
+ case DWC3_REQUEST_STATUS_STALLED:
+ dwc3_gadget_giveback(dep, req, -EPIPE);
+ break;
+ default:
+ dev_err(dwc->dev, "request cancelled with wrong reason:%d\n", req->status);
+ dwc3_gadget_giveback(dep, req, -ECONNRESET);
+ break;
+ }
+ /*
+ * The endpoint is disabled, let the dwc3_remove_requests()
+ * handle the cleanup.
+ */
+ if (!dep->endpoint.desc)
+ break;
}
}
static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
- struct usb_request *request)
+ struct usb_request *request)
{
- struct dwc3_request *req = to_dwc3_request(request);
- struct dwc3_request *r = NULL;
- struct dwc3_ep *dep = to_dwc3_ep(ep);
- struct dwc3 *dwc = dep->dwc;
- unsigned long flags;
- int ret = 0;
+ struct dwc3_request *req = to_dwc3_request(request);
+ struct dwc3_request *r = NULL;
+
+ struct dwc3_ep *dep = to_dwc3_ep(ep);
+ struct dwc3 *dwc = dep->dwc;
+
+ unsigned long flags;
+ int ret = 0;
spin_lock_irqsave(&dwc->lock, flags);
- list_for_each_entry(r, &dep->pending_list, list) {
+ list_for_each_entry(r, &dep->cancelled_list, list) {
if (r == req)
- break;
+ goto out;
}
- if (r != req) {
- list_for_each_entry(r, &dep->started_list, list) {
- if (r == req)
- break;
+ list_for_each_entry(r, &dep->pending_list, list) {
+ if (r == req) {
+ dwc3_gadget_giveback(dep, req, -ECONNRESET);
+ goto out;
}
+ }
+
+ list_for_each_entry(r, &dep->started_list, list) {
if (r == req) {
+ struct dwc3_request *t;
+
/* wait until it is processed */
dwc3_stop_active_transfer(dep, true, true);
- if (!r->trb)
- goto out0;
+ /*
+ * Remove any started request if the transfer is
+ * cancelled.
+ */
+ list_for_each_entry_safe(r, t, &dep->started_list, list)
+ dwc3_gadget_move_cancelled_request(r,
+ DWC3_REQUEST_STATUS_DEQUEUED);
- dwc3_gadget_move_cancelled_request(req);
- if (dep->flags & DWC3_EP_TRANSFER_STARTED)
- goto out0;
- else
- goto out1;
+ dep->flags &= ~DWC3_EP_WAIT_TRANSFER_COMPLETE;
+
+ goto out;
}
- dev_err(dwc->dev, "request %p was not queued to %s\n",
- request, ep->name);
- ret = -EINVAL;
- goto out0;
}
-out1:
- /* giveback the request */
- dwc3_gadget_giveback(dep, req, -ECONNRESET);
-
-out0:
+ dev_err(dwc->dev, "request %pK was not queued to %s\n",
+ request, ep->name);
+ ret = -EINVAL;
+out:
spin_unlock_irqrestore(&dwc->lock, flags);
return ret;
@@ -1481,9 +1966,11 @@ out0:
int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
{
- struct dwc3_gadget_ep_cmd_params params;
- struct dwc3 *dwc = dep->dwc;
- int ret;
+ struct dwc3_gadget_ep_cmd_params params;
+ struct dwc3 *dwc = dep->dwc;
+ struct dwc3_request *req;
+ struct dwc3_request *tmp;
+ int ret;
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
dev_err(dwc->dev, "%s is of Isochronous type\n", dep->name);
@@ -1494,8 +1981,9 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
if (value) {
struct dwc3_trb *trb;
- unsigned transfer_in_flight;
- unsigned started;
+
+ unsigned int transfer_in_flight;
+ unsigned int started;
if (dep->number > 1)
trb = dwc3_ep_prev_trb(dep, dep->trb_enqueue);
@@ -1511,19 +1999,53 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
}
ret = dwc3_send_gadget_ep_cmd(dep, DWC3_DEPCMD_SETSTALL,
- &params);
+ &params);
if (ret)
dev_err(dwc->dev, "failed to set STALL on %s\n",
dep->name);
else
dep->flags |= DWC3_EP_STALL;
} else {
+ /*
+ * Don't issue CLEAR_STALL command to control endpoints. The
+ * controller automatically clears the STALL when it receives
+ * the SETUP token.
+ */
+ if (dep->number <= 1) {
+ dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
+ return 0;
+ }
+
+ dwc3_stop_active_transfer(dep, true, true);
+
+ list_for_each_entry_safe(req, tmp, &dep->started_list, list)
+ dwc3_gadget_move_cancelled_request(req, DWC3_REQUEST_STATUS_STALLED);
+
+ if (dep->flags & DWC3_EP_END_TRANSFER_PENDING ||
+ (dep->flags & DWC3_EP_DELAY_STOP)) {
+ dep->flags |= DWC3_EP_PENDING_CLEAR_STALL;
+ if (protocol)
+ dwc->clear_stall_protocol = dep->number;
+
+ return 0;
+ }
+
+ dwc3_gadget_ep_cleanup_cancelled_requests(dep);
+
ret = dwc3_send_clear_stall_ep_cmd(dep);
- if (ret)
+ if (ret) {
dev_err(dwc->dev, "failed to clear STALL on %s\n",
dep->name);
- else
- dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
+ return ret;
+ }
+
+ dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
+
+ if ((dep->flags & DWC3_EP_DELAY_START) &&
+ !usb_endpoint_xfer_isoc(dep->endpoint.desc))
+ __dwc3_gadget_kick_transfer(dep);
+
+ dep->flags &= ~DWC3_EP_DELAY_START;
}
return ret;
@@ -1531,10 +2053,11 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
static int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value)
{
- struct dwc3_ep *dep = to_dwc3_ep(ep);
- unsigned long flags;
+ struct dwc3_ep *dep = to_dwc3_ep(ep);
- int ret;
+ unsigned long flags;
+
+ int ret;
spin_lock_irqsave(&dwc->lock, flags);
ret = __dwc3_gadget_ep_set_halt(dep, value, false);
@@ -1545,9 +2068,9 @@ static int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value)
static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep)
{
- struct dwc3_ep *dep = to_dwc3_ep(ep);
- unsigned long flags;
- int ret;
+ struct dwc3_ep *dep = to_dwc3_ep(ep);
+ unsigned long flags;
+ int ret;
spin_lock_irqsave(&dwc->lock, flags);
dep->flags |= DWC3_EP_WEDGE;
@@ -1564,13 +2087,13 @@ static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep)
/* -------------------------------------------------------------------------- */
static struct usb_endpoint_descriptor dwc3_gadget_ep0_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
};
static const struct usb_ep_ops dwc3_gadget_ep0_ops = {
- .enable = dwc3_gadget_ep0_enable,
+ .enable = dwc3_gadget_ep0_enable,
.disable = dwc3_gadget_ep0_disable,
.alloc_request = dwc3_gadget_ep_alloc_request,
.free_request = dwc3_gadget_ep_free_request,
@@ -1581,7 +2104,7 @@ static const struct usb_ep_ops dwc3_gadget_ep0_ops = {
};
static const struct usb_ep_ops dwc3_gadget_ep_ops = {
- .enable = dwc3_gadget_ep_enable,
+ .enable = dwc3_gadget_ep_enable,
.disable = dwc3_gadget_ep_disable,
.alloc_request = dwc3_gadget_ep_alloc_request,
.free_request = dwc3_gadget_ep_free_request,
@@ -1595,20 +2118,19 @@ static const struct usb_ep_ops dwc3_gadget_ep_ops = {
static int dwc3_gadget_get_frame(struct usb_gadget *g)
{
- struct dwc3 *dwc = gadget_to_dwc(g);
+ struct dwc3 *dwc = gadget_to_dwc(g);
return __dwc3_gadget_get_frame(dwc);
}
static int __dwc3_gadget_wakeup(struct dwc3 *dwc)
{
- int retries;
+ int retries;
- int ret;
- u32 reg;
+ int ret;
+ u32 reg;
- u8 link_state;
- u8 speed;
+ u8 link_state;
/*
* According to the Databook Remote wakeup request should
@@ -1618,16 +2140,15 @@ static int __dwc3_gadget_wakeup(struct dwc3 *dwc)
*/
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
- speed = reg & DWC3_DSTS_CONNECTSPD;
- if ((speed == DWC3_DSTS_SUPERSPEED) ||
- (speed == DWC3_DSTS_SUPERSPEED_PLUS))
- return 0;
-
link_state = DWC3_DSTS_USBLNKST(reg);
switch (link_state) {
+ case DWC3_LINK_STATE_RESET:
case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */
case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */
+ case DWC3_LINK_STATE_U2: /* in HS, means Sleep (L1) */
+ case DWC3_LINK_STATE_U1:
+ case DWC3_LINK_STATE_RESUME:
break;
default:
return -EINVAL;
@@ -1640,7 +2161,7 @@ static int __dwc3_gadget_wakeup(struct dwc3 *dwc)
}
/* Recent versions do this automatically */
- if (dwc->revision < DWC3_REVISION_194A) {
+ if (DWC3_VER_IS_PRIOR(DWC3, 194A)) {
/* write zeroes to Link Change Request */
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK;
@@ -1668,9 +2189,9 @@ static int __dwc3_gadget_wakeup(struct dwc3 *dwc)
static int dwc3_gadget_wakeup(struct usb_gadget *g)
{
- struct dwc3 *dwc = gadget_to_dwc(g);
- unsigned long flags;
- int ret;
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ unsigned long flags;
+ int ret;
spin_lock_irqsave(&dwc->lock, flags);
ret = __dwc3_gadget_wakeup(dwc);
@@ -1680,37 +2201,145 @@ static int dwc3_gadget_wakeup(struct usb_gadget *g)
}
static int dwc3_gadget_set_selfpowered(struct usb_gadget *g,
- int is_selfpowered)
+ int is_selfpowered)
{
- struct dwc3 *dwc = gadget_to_dwc(g);
- unsigned long flags;
+ unsigned long flags;
spin_lock_irqsave(&dwc->lock, flags);
- dwc->is_selfpowered = !!is_selfpowered;
+ g->is_selfpowered = !!is_selfpowered;
spin_unlock_irqrestore(&dwc->lock, flags);
return 0;
}
+static void dwc3_stop_active_transfers(struct dwc3 *dwc)
+{
+ u32 epnum;
+
+ for (epnum = 2; epnum < dwc->num_eps; epnum++) {
+ struct dwc3_ep *dep;
+
+ dep = dwc->eps[epnum];
+ if (!dep)
+ continue;
+
+ dwc3_remove_requests(dwc, dep, -ESHUTDOWN);
+ }
+}
+
+static void __dwc3_gadget_set_ssp_rate(struct dwc3 *dwc)
+{
+ enum usb_ssp_rate ssp_rate = dwc->gadget_ssp_rate;
+ u32 reg;
+
+ if (ssp_rate == USB_SSP_GEN_UNKNOWN)
+ ssp_rate = dwc->max_ssp_rate;
+
+ reg = dwc3_readl(dwc->regs, DWC3_DCFG);
+ reg &= ~DWC3_DCFG_SPEED_MASK;
+ reg &= ~DWC3_DCFG_NUMLANES(~0);
+
+ if (ssp_rate == USB_SSP_GEN_1x2)
+ reg |= DWC3_DCFG_SUPERSPEED;
+ else if (dwc->max_ssp_rate != USB_SSP_GEN_1x2)
+ reg |= DWC3_DCFG_SUPERSPEED_PLUS;
+
+ if (ssp_rate != USB_SSP_GEN_2x1 &&
+ dwc->max_ssp_rate != USB_SSP_GEN_2x1)
+ reg |= DWC3_DCFG_NUMLANES(1);
+
+ dwc3_writel(dwc->regs, DWC3_DCFG, reg);
+}
+
+static void __dwc3_gadget_set_speed(struct dwc3 *dwc)
+{
+ enum usb_device_speed speed;
+ u32 reg;
+
+ speed = dwc->gadget_max_speed;
+ if (speed == USB_SPEED_UNKNOWN || speed > dwc->maximum_speed)
+ speed = dwc->maximum_speed;
+
+ if (speed == USB_SPEED_SUPER_PLUS &&
+ DWC3_IP_IS(DWC32)) {
+ __dwc3_gadget_set_ssp_rate(dwc);
+ return;
+ }
+
+ reg = dwc3_readl(dwc->regs, DWC3_DCFG);
+ reg &= ~(DWC3_DCFG_SPEED_MASK);
+
+ /*
+ * WORKAROUND: DWC3 revision < 2.20a have an issue
+ * which would cause metastability state on Run/Stop
+ * bit if we try to force the IP to USB2-only mode.
+ *
+ * Because of that, we cannot configure the IP to any
+ * speed other than the SuperSpeed
+ *
+ * Refers to:
+ *
+ * STAR#9000525659: Clock Domain Crossing on DCTL in
+ * USB 2.0 Mode
+ */
+ if (DWC3_VER_IS_PRIOR(DWC3, 220A) &&
+ !dwc->dis_metastability_quirk) {
+ reg |= DWC3_DCFG_SUPERSPEED;
+ } else {
+ switch (speed) {
+ case USB_SPEED_FULL:
+ reg |= DWC3_DCFG_FULLSPEED;
+ break;
+ case USB_SPEED_HIGH:
+ reg |= DWC3_DCFG_HIGHSPEED;
+ break;
+ case USB_SPEED_SUPER:
+ reg |= DWC3_DCFG_SUPERSPEED;
+ break;
+ case USB_SPEED_SUPER_PLUS:
+ if (DWC3_IP_IS(DWC3))
+ reg |= DWC3_DCFG_SUPERSPEED;
+ else
+ reg |= DWC3_DCFG_SUPERSPEED_PLUS;
+ break;
+ default:
+ dev_err(dwc->dev, "invalid speed (%d)\n", speed);
+
+ if (DWC3_IP_IS(DWC3))
+ reg |= DWC3_DCFG_SUPERSPEED;
+ else
+ reg |= DWC3_DCFG_SUPERSPEED_PLUS;
+ }
+ }
+
+ if (DWC3_IP_IS(DWC32) &&
+ speed > USB_SPEED_UNKNOWN &&
+ speed < USB_SPEED_SUPER_PLUS)
+ reg &= ~DWC3_DCFG_NUMLANES(~0);
+
+ dwc3_writel(dwc->regs, DWC3_DCFG, reg);
+}
+
static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
{
- u32 reg;
- u32 timeout = 500;
+ u32 reg;
+ u32 timeout = 2000;
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
if (is_on) {
- if (dwc->revision <= DWC3_REVISION_187A) {
+ if (DWC3_VER_IS_WITHIN(DWC3, ANY, 187A)) {
reg &= ~DWC3_DCTL_TRGTULST_MASK;
reg |= DWC3_DCTL_TRGTULST_RX_DET;
}
- if (dwc->revision >= DWC3_REVISION_194A)
+ if (!DWC3_VER_IS_PRIOR(DWC3, 194A))
reg &= ~DWC3_DCTL_KEEP_CONNECT;
reg |= DWC3_DCTL_RUN_STOP;
if (dwc->has_hibernation)
reg |= DWC3_DCTL_KEEP_CONNECT;
+ __dwc3_gadget_set_speed(dwc);
dwc->pullups_connected = true;
} else {
reg &= ~DWC3_DCTL_RUN_STOP;
@@ -1721,9 +2350,10 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
dwc->pullups_connected = false;
}
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ dwc3_gadget_dctl_write_safe(dwc, reg);
do {
+ udelay(1000);
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
reg &= DWC3_DSTS_DEVCTRLHLT;
} while (--timeout && !(!is_on ^ !reg));
@@ -1731,54 +2361,104 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
if (!timeout)
return -ETIMEDOUT;
- dev_dbg(dwc->dev, "gadget %s data soft-%s\n",
- dwc->gadget_driver
- ? dwc->gadget_driver->function : "no-function",
- is_on ? "connect" : "disconnect");
-
return 0;
}
-static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
+static void dwc3_gadget_disable_irq(struct dwc3 *dwc);
+static void __dwc3_gadget_stop(struct dwc3 *dwc);
+static int __dwc3_gadget_start(struct dwc3 *dwc);
+
+static int dwc3_gadget_soft_disconnect(struct dwc3 *dwc)
{
- struct dwc3 *dwc = gadget_to_dwc(g);
unsigned long flags;
- int ret;
- is_on = !!is_on;
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc->connected = false;
/*
* Per databook, when we want to stop the gadget, if a control transfer
* is still in process, complete it and get the core into setup phase.
*/
- if (!is_on && dwc->ep0state != EP0_SETUP_PHASE)
- dev_warn(dwc->dev, "not in SETUP phase\n");
+ if (dwc->ep0state != EP0_SETUP_PHASE) {
+ /*
+ * Original Linux code waits for ep0state bein in setup
+ * phase here using completions. Completions are not properly
+ * implemented in barebox, hence the code is skipped here. I wasn't
+ * able to trigger this code in barebox, but if you hit this compare
+ * it with Linux code and implement it here.
+ */
+ dev_warn(dwc->dev, "%s: unexpected state\n", __func__);
+ }
- spin_lock_irqsave(&dwc->lock, flags);
- ret = dwc3_gadget_run_stop(dwc, is_on, false);
+ /*
+ * In the Synopsys DesignWare Cores USB3 Databook Rev. 3.30a
+ * Section 4.1.8 Table 4-7, it states that for a device-initiated
+ * disconnect, the SW needs to ensure that it sends "a DEPENDXFER
+ * command for any active transfers" before clearing the RunStop
+ * bit.
+ */
+ dwc3_stop_active_transfers(dwc);
+ __dwc3_gadget_stop(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
+ /*
+ * Note: if the GEVNTCOUNT indicates events in the event buffer, the
+ * driver needs to acknowledge them before the controller can halt.
+ * Simply let the interrupt handler acknowledges and handle the
+ * remaining event generated by the controller while polling for
+ * DSTS.DEVCTLHLT.
+ */
+ return dwc3_gadget_run_stop(dwc, false, false);
+}
+
+static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
+{
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ int ret;
+
+ is_on = !!is_on;
+
+ dwc->softconnect = is_on;
+
+ if (!is_on) {
+ ret = dwc3_gadget_soft_disconnect(dwc);
+ } else {
+ /*
+ * In the Synopsys DWC_usb31 1.90a programming guide section
+ * 4.1.9, it specifies that for a reconnect after a
+ * device-initiated disconnect requires a core soft reset
+ * (DCTL.CSftRst) before enabling the run/stop bit.
+ */
+ dwc3_core_soft_reset(dwc);
+
+ dwc3_event_buffers_setup(dwc);
+ __dwc3_gadget_start(dwc);
+ ret = dwc3_gadget_run_stop(dwc, true, false);
+ }
+
return ret;
}
static void dwc3_gadget_enable_irq(struct dwc3 *dwc)
{
- u32 reg;
+ u32 reg;
/* Enable all but Start and End of Frame IRQs */
- reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN |
- DWC3_DEVTEN_EVNTOVERFLOWEN |
- DWC3_DEVTEN_CMDCMPLTEN |
- DWC3_DEVTEN_ERRTICERREN |
- DWC3_DEVTEN_WKUPEVTEN |
- DWC3_DEVTEN_ULSTCNGEN |
- DWC3_DEVTEN_CONNECTDONEEN |
- DWC3_DEVTEN_USBRSTEN |
- DWC3_DEVTEN_DISCONNEVTEN);
-
- if (dwc->revision < DWC3_REVISION_250A)
+ reg = (DWC3_DEVTEN_EVNTOVERFLOWEN |
+ DWC3_DEVTEN_CMDCMPLTEN |
+ DWC3_DEVTEN_ERRTICERREN |
+ DWC3_DEVTEN_WKUPEVTEN |
+ DWC3_DEVTEN_CONNECTDONEEN |
+ DWC3_DEVTEN_USBRSTEN |
+ DWC3_DEVTEN_DISCONNEVTEN);
+
+ if (DWC3_VER_IS_PRIOR(DWC3, 250A))
reg |= DWC3_DEVTEN_ULSTCNGEN;
+ /* On 2.30a and above this bit enables U3/L2-L1 Suspend Events */
+ if (!DWC3_VER_IS_PRIOR(DWC3, 230A))
+ reg |= DWC3_DEVTEN_U3L2L1SUSPEN;
+
dwc3_writel(dwc->regs, DWC3_DEVTEN, reg);
}
@@ -1817,7 +2497,7 @@ static void dwc3_gadget_setup_nump(struct dwc3 *dwc)
u32 reg;
ram2_depth = DWC3_GHWPARAMS7_RAM2_DEPTH(dwc->hwparams.hwparams7);
- mdwidth = DWC3_GHWPARAMS0_MDWIDTH(dwc->hwparams.hwparams0);
+ mdwidth = dwc3_mdwidth(dwc);
nump = ((ram2_depth * mdwidth / 8) - 24 - 16) / 1024;
nump = min_t(u32, nump, 16);
@@ -1831,9 +2511,20 @@ static void dwc3_gadget_setup_nump(struct dwc3 *dwc)
static int __dwc3_gadget_start(struct dwc3 *dwc)
{
- struct dwc3_ep *dep;
- int ret = 0;
- u32 reg;
+ struct dwc3_ep *dep;
+ int ret = 0;
+ u32 reg;
+
+ /*
+ * Use IMOD if enabled via dwc->imod_interval. Otherwise, if
+ * the core supports IMOD, disable it.
+ */
+ if (dwc->imod_interval) {
+ dwc3_writel(dwc->regs, DWC3_DEV_IMOD(0), dwc->imod_interval);
+ dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), DWC3_GEVNTCOUNT_EHB);
+ } else if (dwc3_has_imod(dwc)) {
+ dwc3_writel(dwc->regs, DWC3_DEV_IMOD(0), 0);
+ }
/*
* We are telling dwc3 that we want to use DCFG.NUMP as ACK TP's NUMP
@@ -1843,19 +2534,38 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
* bursts of data without going through any sort of endpoint throttling.
*/
reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG);
- if (dwc3_is_usb31(dwc))
- reg &= ~DWC31_GRXTHRCFG_PKTCNTSEL;
- else
+ if (DWC3_IP_IS(DWC3))
reg &= ~DWC3_GRXTHRCFG_PKTCNTSEL;
+ else
+ reg &= ~DWC31_GRXTHRCFG_PKTCNTSEL;
dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg);
dwc3_gadget_setup_nump(dwc);
+ /*
+ * Currently the controller handles single stream only. So, Ignore
+ * Packet Pending bit for stream selection and don't search for another
+ * stream if the host sends Data Packet with PP=0 (for OUT direction) or
+ * ACK with NumP=0 and PP=0 (for IN direction). This slightly improves
+ * the stream performance.
+ */
+ reg = dwc3_readl(dwc->regs, DWC3_DCFG);
+ reg |= DWC3_DCFG_IGNSTRMPP;
+ dwc3_writel(dwc->regs, DWC3_DCFG, reg);
+
+ /* Enable MST by default if the device is capable of MST */
+ if (DWC3_MST_CAPABLE(&dwc->hwparams)) {
+ reg = dwc3_readl(dwc->regs, DWC3_DCFG1);
+ reg &= ~DWC3_DCFG1_DIS_MST_ENH;
+ dwc3_writel(dwc->regs, DWC3_DCFG1, reg);
+ }
+
/* Start with SuperSpeed Default */
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
dep = dwc->eps[0];
+ dep->flags = 0;
ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
@@ -1863,6 +2573,7 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
}
dep = dwc->eps[1];
+ dep->flags = 0;
ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
@@ -1871,7 +2582,9 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
/* begin to receive SETUP packets */
dwc->ep0state = EP0_SETUP_PHASE;
+ dwc->ep0_bounced = false;
dwc->link_state = DWC3_LINK_STATE_SS_DIS;
+ dwc->delayed_status = false;
dwc3_ep0_out_start(dwc);
dwc3_gadget_enable_irq(dwc);
@@ -1888,109 +2601,163 @@ err0:
static int dwc3_gadget_start(struct usb_gadget *g,
struct usb_gadget_driver *driver)
{
- struct dwc3 *dwc = gadget_to_dwc(g);
- unsigned long flags;
- int ret = 0;
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ unsigned long flags;
- //dwc3_gadget_wakeup(g);
spin_lock_irqsave(&dwc->lock, flags);
- if (dwc->gadget_driver) {
- dev_err(dwc->dev, "%s is already bound to %s\n",
- dwc->gadget.name,
- dwc->gadget_driver->function);
- ret = -EBUSY;
- goto err1;
- }
+ dwc->gadget_driver = driver;
+ spin_unlock_irqrestore(&dwc->lock, flags);
- dwc->gadget_driver = driver;
+ return 0;
+}
- __dwc3_gadget_start(dwc);
+static void __dwc3_gadget_stop(struct dwc3 *dwc)
+{
+ dwc3_gadget_disable_irq(dwc);
+ __dwc3_gadget_ep_disable(dwc->eps[0]);
+ __dwc3_gadget_ep_disable(dwc->eps[1]);
+}
+static int dwc3_gadget_stop(struct usb_gadget *g)
+{
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc->gadget_driver = NULL;
+ dwc->max_cfg_eps = 0;
spin_unlock_irqrestore(&dwc->lock, flags);
return 0;
+}
-err1:
- spin_unlock_irqrestore(&dwc->lock, flags);
+static void dwc3_gadget_config_params(struct usb_gadget *g,
+ struct usb_dcd_config_params *params)
+{
+ struct dwc3 *dwc = gadget_to_dwc(g);
- return ret;
+ params->besl_baseline = USB_DEFAULT_BESL_UNSPECIFIED;
+ params->besl_deep = USB_DEFAULT_BESL_UNSPECIFIED;
+
+ /* Recommended BESL */
+ if (!dwc->dis_enblslpm_quirk) {
+ /*
+ * If the recommended BESL baseline is 0 or if the BESL deep is
+ * less than 2, Microsoft's Windows 10 host usb stack will issue
+ * a usb reset immediately after it receives the extended BOS
+ * descriptor and the enumeration will fail. To maintain
+ * compatibility with the Windows' usb stack, let's set the
+ * recommended BESL baseline to 1 and clamp the BESL deep to be
+ * within 2 to 15.
+ */
+ params->besl_baseline = 1;
+ if (dwc->is_utmi_l1_suspend)
+ params->besl_deep =
+ clamp_t(u8, dwc->hird_threshold, 2, 15);
+ }
+
+ /* U1 Device exit Latency */
+ if (dwc->dis_u1_entry_quirk)
+ params->bU1devExitLat = 0;
+ else
+ params->bU1devExitLat = DWC3_DEFAULT_U1_DEV_EXIT_LAT;
+
+ /* U2 Device exit Latency */
+ if (dwc->dis_u2_entry_quirk)
+ params->bU2DevExitLat = 0;
+ else
+ params->bU2DevExitLat =
+ cpu_to_le16(DWC3_DEFAULT_U2_DEV_EXIT_LAT);
}
-static int dwc3_gadget_stop(struct usb_gadget *g,
- struct usb_gadget_driver *driver)
+static void dwc3_gadget_set_speed(struct usb_gadget *g,
+ enum usb_device_speed speed)
{
- struct dwc3 *dwc = gadget_to_dwc(g);
- unsigned long flags;
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ unsigned long flags;
spin_lock_irqsave(&dwc->lock, flags);
+ dwc->gadget_max_speed = speed;
+ spin_unlock_irqrestore(&dwc->lock, flags);
+}
- dwc3_gadget_disable_irq(dwc);
- __dwc3_gadget_ep_disable(dwc->eps[0]);
- __dwc3_gadget_ep_disable(dwc->eps[1]);
+static void dwc3_gadget_set_ssp_rate(struct usb_gadget *g,
+ enum usb_ssp_rate rate)
+{
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ unsigned long flags;
- dwc->gadget_driver = NULL;
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc->gadget_max_speed = USB_SPEED_SUPER_PLUS;
+ dwc->gadget_ssp_rate = rate;
spin_unlock_irqrestore(&dwc->lock, flags);
+}
+
+static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
+{
+ struct dwc3 *dwc = gadget_to_dwc(g);
+
+ if (dwc->usb2_phy)
+ return usb_phy_set_power(dwc->usb2_phy, mA);
+
+ if (!dwc->usb_psy)
+ return -EOPNOTSUPP;
return 0;
}
-static void dwc3_gadget_set_speed(struct dwc3 *dwc,
- enum usb_device_speed speed)
+/**
+ * dwc3_gadget_check_config - ensure dwc3 can support the USB configuration
+ * @g: pointer to the USB gadget
+ *
+ * Used to record the maximum number of endpoints being used in a USB composite
+ * device. (across all configurations) This is to be used in the calculation
+ * of the TXFIFO sizes when resizing internal memory for individual endpoints.
+ * It will help ensured that the resizing logic reserves enough space for at
+ * least one max packet.
+ */
+static int dwc3_gadget_check_config(struct usb_gadget *g)
{
- unsigned long flags;
- u32 reg;
-
- spin_lock_irqsave(&dwc->lock, flags);
- reg = dwc3_readl(dwc->regs, DWC3_DCFG);
- reg &= ~(DWC3_DCFG_SPEED_MASK);
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ struct usb_ep *ep;
+ int fifo_size = 0;
+ int ram1_depth;
+ int ep_num = 0;
- /*
- * WORKAROUND: DWC3 revision < 2.20a have an issue
- * which would cause metastability state on Run/Stop
- * bit if we try to force the IP to USB2-only mode.
- *
- * Because of that, we cannot configure the IP to any
- * speed other than the SuperSpeed
- *
- * Refers to:
- *
- * STAR#9000525659: Clock Domain Crossing on DCTL in
- * USB 2.0 Mode
- */
- if (dwc->revision < DWC3_REVISION_220A &&
- !dwc->dis_metastability_quirk) {
- reg |= DWC3_DCFG_SUPERSPEED;
- } else {
- switch (speed) {
- case USB_SPEED_LOW:
- reg |= DWC3_DCFG_LOWSPEED;
- break;
- case USB_SPEED_FULL:
- reg |= DWC3_DCFG_FULLSPEED;
- break;
- case USB_SPEED_HIGH:
- reg |= DWC3_DCFG_HIGHSPEED;
- break;
- case USB_SPEED_SUPER:
- reg |= DWC3_DCFG_SUPERSPEED;
- break;
- case USB_SPEED_SUPER_PLUS:
- if (dwc3_is_usb31(dwc))
- reg |= DWC3_DCFG_SUPERSPEED_PLUS;
- else
- reg |= DWC3_DCFG_SUPERSPEED;
- break;
- default:
- dev_err(dwc->dev, "invalid speed (%d)\n", speed);
+ if (!dwc->do_fifo_resize)
+ return 0;
- if (dwc->revision & DWC3_REVISION_IS_DWC31)
- reg |= DWC3_DCFG_SUPERSPEED_PLUS;
- else
- reg |= DWC3_DCFG_SUPERSPEED;
- }
+ list_for_each_entry(ep, &g->ep_list, ep_list) {
+ /* Only interested in the IN endpoints */
+ if (ep->claimed && (ep->address & USB_DIR_IN))
+ ep_num++;
}
- dwc3_writel(dwc->regs, DWC3_DCFG, reg);
+ if (ep_num <= dwc->max_cfg_eps)
+ return 0;
+
+ /* Update the max number of eps in the composition */
+ dwc->max_cfg_eps = ep_num;
+
+ fifo_size = dwc3_gadget_calc_tx_fifo_size(dwc, dwc->max_cfg_eps);
+ /* Based on the equation, increment by one for every ep */
+ fifo_size += dwc->max_cfg_eps;
+
+ /* Check if we can fit a single fifo per endpoint */
+ ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);
+ if (fifo_size > ram1_depth)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void dwc3_gadget_async_callbacks(struct usb_gadget *g, bool enable)
+{
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc->async_callbacks = enable;
spin_unlock_irqrestore(&dwc->lock, flags);
}
@@ -1998,12 +2765,18 @@ static void dwc3_gadget_poll(struct usb_gadget *g);
static const struct usb_gadget_ops dwc3_gadget_ops = {
.get_frame = dwc3_gadget_get_frame,
- .wakeup = dwc3_gadget_wakeup,
+ .wakeup = dwc3_gadget_wakeup,
.set_selfpowered = dwc3_gadget_set_selfpowered,
- .pullup = dwc3_gadget_pullup,
+ .pullup = dwc3_gadget_pullup,
.udc_start = dwc3_gadget_start,
.udc_stop = dwc3_gadget_stop,
.udc_poll = dwc3_gadget_poll,
+ .udc_set_speed = dwc3_gadget_set_speed,
+ .udc_set_ssp_rate = dwc3_gadget_set_ssp_rate,
+ .get_config_params = dwc3_gadget_config_params,
+ .vbus_draw = dwc3_gadget_vbus_draw,
+ .check_config = dwc3_gadget_check_config,
+ .udc_async_callbacks = dwc3_gadget_async_callbacks,
};
/* -------------------------------------------------------------------------- */
@@ -2016,7 +2789,9 @@ static int dwc3_gadget_init_control_endpoint(struct dwc3_ep *dep)
dep->endpoint.maxburst = 1;
dep->endpoint.ops = &dwc3_gadget_ep0_ops;
if (!dep->direction)
- dwc->gadget.ep0 = &dep->endpoint;
+ dwc->gadget->ep0 = &dep->endpoint;
+
+ dep->endpoint.caps.type_control = true;
return 0;
}
@@ -2024,41 +2799,48 @@ static int dwc3_gadget_init_control_endpoint(struct dwc3_ep *dep)
static int dwc3_gadget_init_in_endpoint(struct dwc3_ep *dep)
{
struct dwc3 *dwc = dep->dwc;
- int mdwidth;
- int kbytes;
+ u32 mdwidth;
int size;
+ int maxpacket;
+
+ mdwidth = dwc3_mdwidth(dwc);
- mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
/* MDWIDTH is represented in bits, we need it in bytes */
mdwidth /= 8;
size = dwc3_readl(dwc->regs, DWC3_GTXFIFOSIZ(dep->number >> 1));
- if (dwc3_is_usb31(dwc))
- size = DWC31_GTXFIFOSIZ_TXFDEF(size);
+ if (DWC3_IP_IS(DWC3))
+ size = DWC3_GTXFIFOSIZ_TXFDEP(size);
else
- size = DWC3_GTXFIFOSIZ_TXFDEF(size);
-
- /* FIFO Depth is in MDWDITH bytes. Multiply */
- size *= mdwidth;
-
- kbytes = size / 1024;
- if (kbytes == 0)
- kbytes = 1;
+ size = DWC31_GTXFIFOSIZ_TXFDEP(size);
/*
- * FIFO sizes account an extra MDWIDTH * (kbytes + 1) bytes for
- * internal overhead. We don't really know how these are used,
- * but documentation say it exists.
+ * maxpacket size is determined as part of the following, after assuming
+ * a mult value of one maxpacket:
+ * DWC3 revision 280A and prior:
+ * fifo_size = mult * (max_packet / mdwidth) + 1;
+ * maxpacket = mdwidth * (fifo_size - 1);
+ *
+ * DWC3 revision 290A and onwards:
+ * fifo_size = mult * ((max_packet + mdwidth)/mdwidth + 1) + 1
+ * maxpacket = mdwidth * ((fifo_size - 1) - 1) - mdwidth;
*/
- size -= mdwidth * (kbytes + 1);
- size /= kbytes;
+ if (DWC3_VER_IS_PRIOR(DWC3, 290A))
+ maxpacket = mdwidth * (size - 1);
+ else
+ maxpacket = mdwidth * ((size - 1) - 1) - mdwidth;
+ /* Functionally, space for one max packet is sufficient */
+ size = min_t(int, maxpacket, 1024);
usb_ep_set_maxpacket_limit(&dep->endpoint, size);
- dep->endpoint.max_streams = 15;
+ dep->endpoint.max_streams = 16;
dep->endpoint.ops = &dwc3_gadget_ep_ops;
list_add_tail(&dep->endpoint.ep_list,
- &dwc->gadget.ep_list);
+ &dwc->gadget->ep_list);
+ dep->endpoint.caps.type_iso = true;
+ dep->endpoint.caps.type_bulk = true;
+ dep->endpoint.caps.type_int = true;
return dwc3_alloc_trb_pool(dep);
}
@@ -2066,22 +2848,56 @@ static int dwc3_gadget_init_in_endpoint(struct dwc3_ep *dep)
static int dwc3_gadget_init_out_endpoint(struct dwc3_ep *dep)
{
struct dwc3 *dwc = dep->dwc;
+ u32 mdwidth;
+ int size;
+
+ mdwidth = dwc3_mdwidth(dwc);
+
+ /* MDWIDTH is represented in bits, convert to bytes */
+ mdwidth /= 8;
+
+ /* All OUT endpoints share a single RxFIFO space */
+ size = dwc3_readl(dwc->regs, DWC3_GRXFIFOSIZ(0));
+ if (DWC3_IP_IS(DWC3))
+ size = DWC3_GRXFIFOSIZ_RXFDEP(size);
+ else
+ size = DWC31_GRXFIFOSIZ_RXFDEP(size);
+
+ /* FIFO depth is in MDWDITH bytes */
+ size *= mdwidth;
+
+ /*
+ * To meet performance requirement, a minimum recommended RxFIFO size
+ * is defined as follow:
+ * RxFIFO size >= (3 x MaxPacketSize) +
+ * (3 x 8 bytes setup packets size) + (16 bytes clock crossing margin)
+ *
+ * Then calculate the max packet limit as below.
+ */
+ size -= (3 * 8) + 16;
+ if (size < 0)
+ size = 0;
+ else
+ size /= 3;
- usb_ep_set_maxpacket_limit(&dep->endpoint, 1024);
- dep->endpoint.max_streams = 15;
+ usb_ep_set_maxpacket_limit(&dep->endpoint, size);
+ dep->endpoint.max_streams = 16;
dep->endpoint.ops = &dwc3_gadget_ep_ops;
list_add_tail(&dep->endpoint.ep_list,
- &dwc->gadget.ep_list);
+ &dwc->gadget->ep_list);
+ dep->endpoint.caps.type_iso = true;
+ dep->endpoint.caps.type_bulk = true;
+ dep->endpoint.caps.type_int = true;
return dwc3_alloc_trb_pool(dep);
}
static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum)
{
- struct dwc3_ep *dep;
- bool direction = epnum & 1;
- int ret;
- u8 num = epnum >> 1;
+ struct dwc3_ep *dep;
+ bool direction = epnum & 1;
+ int ret;
+ u8 num = epnum >> 1;
dep = kzalloc(sizeof(*dep), GFP_KERNEL);
if (!dep)
@@ -2096,7 +2912,7 @@ static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum)
dep->start_cmd_status = 0;
snprintf(dep->name, sizeof(dep->name), "ep%u%s", num,
- direction ? "in" : "out");
+ direction ? "in" : "out");
dep->endpoint.name = dep->name;
@@ -2105,8 +2921,6 @@ static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum)
dep->endpoint.comp_desc = NULL;
}
- spin_lock_init(&dep->lock);
-
if (num == 0)
ret = dwc3_gadget_init_control_endpoint(dep);
else if (direction)
@@ -2117,21 +2931,26 @@ static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum)
if (ret)
return ret;
+ dep->endpoint.caps.dir_in = direction;
+ dep->endpoint.caps.dir_out = !direction;
+
INIT_LIST_HEAD(&dep->pending_list);
INIT_LIST_HEAD(&dep->started_list);
INIT_LIST_HEAD(&dep->cancelled_list);
+ dwc3_debugfs_create_endpoint_dir(dep);
+
return 0;
}
static int dwc3_gadget_init_endpoints(struct dwc3 *dwc, u8 total)
{
- u8 epnum;
+ u8 epnum;
- INIT_LIST_HEAD(&dwc->gadget.ep_list);
+ INIT_LIST_HEAD(&dwc->gadget->ep_list);
for (epnum = 0; epnum < total; epnum++) {
- int ret;
+ int ret;
ret = dwc3_gadget_init_endpoint(dwc, epnum);
if (ret)
@@ -2143,8 +2962,8 @@ static int dwc3_gadget_init_endpoints(struct dwc3 *dwc, u8 total)
static void dwc3_gadget_free_endpoints(struct dwc3 *dwc)
{
- struct dwc3_ep *dep;
- u8 epnum;
+ struct dwc3_ep *dep;
+ u8 epnum;
for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) {
dep = dwc->eps[epnum];
@@ -2164,6 +2983,7 @@ static void dwc3_gadget_free_endpoints(struct dwc3 *dwc)
list_del(&dep->endpoint.ep_list);
}
+ dwc3_debugfs_remove_endpoint_dir(dep);
kfree(dep);
}
}
@@ -2171,12 +2991,10 @@ static void dwc3_gadget_free_endpoints(struct dwc3 *dwc)
/* -------------------------------------------------------------------------- */
static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep,
- struct dwc3_request *req,
- struct dwc3_trb *trb,
- const struct dwc3_event_depevt *event,
- int status, int chain)
+ struct dwc3_request *req, struct dwc3_trb *trb,
+ const struct dwc3_event_depevt *event, int status, int chain)
{
- unsigned int count;
+ unsigned int count;
dwc3_ep_inc_deq(dep);
@@ -2205,15 +3023,16 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep,
frame_number = DWC3_TRB_CTRL_GET_SID_SOFN(trb->ctrl);
frame_number &= ~(dep->interval - 1);
+ req->request.frame_number = frame_number;
}
/*
- * If we're dealing with unaligned size OUT transfer, we will be left
- * with one TRB pending in the ring. We need to manually clear HWO bit
- * from that TRB.
+ * We use bounce buffer for requests that needs extra TRB or OUT ZLP. If
+ * this TRB points to the bounce buffer address, it's a MPS alignment
+ * TRB. Don't add it to req->remaining calculation.
*/
-
- if (req->needs_extra_trb && !(trb->ctrl & DWC3_TRB_CTRL_CHN)) {
+ if (trb->bpl == lower_32_bits(dep->dwc->bounce_addr) &&
+ trb->bph == upper_32_bits(dep->dwc->bounce_addr)) {
trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
return 1;
}
@@ -2227,16 +3046,20 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep,
if (event->status & DEPEVT_STATUS_SHORT && !chain)
return 1;
- if (event->status & DEPEVT_STATUS_IOC)
+ if ((trb->ctrl & DWC3_TRB_CTRL_ISP_IMI) &&
+ DWC3_TRB_SIZE_TRBSTS(trb->size) == DWC3_TRBSTS_MISSED_ISOC)
+ return 1;
+
+ if ((trb->ctrl & DWC3_TRB_CTRL_IOC) ||
+ (trb->ctrl & DWC3_TRB_CTRL_LST))
return 1;
return 0;
}
static int dwc3_gadget_ep_reclaim_trb_linear(struct dwc3_ep *dep,
- struct dwc3_request *req,
- const struct dwc3_event_depevt *event,
- int status)
+ struct dwc3_request *req, const struct dwc3_event_depevt *event,
+ int status)
{
struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];
@@ -2244,15 +3067,24 @@ static int dwc3_gadget_ep_reclaim_trb_linear(struct dwc3_ep *dep,
event, status, false);
}
+static bool dwc3_gadget_ep_request_completed(struct dwc3_request *req)
+{
+ return req->num_pending_sgs == 0 && req->num_queued_sgs == 0;
+}
+
static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep,
- const struct dwc3_event_depevt *event,
- struct dwc3_request *req,
- int status)
+ const struct dwc3_event_depevt *event,
+ struct dwc3_request *req, int status)
{
+ int request_status;
int ret;
- ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event,
- status);
+ ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, status);
+
+ req->request.actual = req->request.length - req->remaining;
+
+ if (!dwc3_gadget_ep_request_completed(req))
+ goto out;
if (req->needs_extra_trb) {
ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event,
@@ -2260,69 +3092,121 @@ static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep,
req->needs_extra_trb = false;
}
- req->request.actual = req->request.length - req->remaining;
+ /*
+ * The event status only reflects the status of the TRB with IOC set.
+ * For the requests that don't set interrupt on completion, the driver
+ * needs to check and return the status of the completed TRBs associated
+ * with the request. Use the status of the last TRB of the request.
+ */
+ if (req->request.no_interrupt) {
+ struct dwc3_trb *trb;
- dwc3_gadget_giveback(dep, req, status);
+ trb = dwc3_ep_prev_trb(dep, dep->trb_dequeue);
+ switch (DWC3_TRB_SIZE_TRBSTS(trb->size)) {
+ case DWC3_TRBSTS_MISSED_ISOC:
+ /* Isoc endpoint only */
+ request_status = -EXDEV;
+ break;
+ case DWC3_TRB_STS_XFER_IN_PROG:
+ /* Applicable when End Transfer with ForceRM=0 */
+ case DWC3_TRBSTS_SETUP_PENDING:
+ /* Control endpoint only */
+ case DWC3_TRBSTS_OK:
+ default:
+ request_status = 0;
+ break;
+ }
+ } else {
+ request_status = status;
+ }
+
+ dwc3_gadget_giveback(dep, req, request_status);
+out:
return ret;
}
static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep,
- const struct dwc3_event_depevt *event,
- int status)
+ const struct dwc3_event_depevt *event, int status)
{
- struct dwc3_request *req;
- struct dwc3_request *tmp;
+ struct dwc3_request *req;
- list_for_each_entry_safe(req, tmp, &dep->started_list, list) {
+ while (!list_empty(&dep->started_list)) {
int ret;
+ req = next_request(&dep->started_list);
ret = dwc3_gadget_ep_cleanup_completed_request(dep, event,
req, status);
if (ret)
break;
+ /*
+ * The endpoint is disabled, let the dwc3_remove_requests()
+ * handle the cleanup.
+ */
+ if (!dep->endpoint.desc)
+ break;
}
}
+static bool dwc3_gadget_ep_should_continue(struct dwc3_ep *dep)
+{
+ struct dwc3_request *req;
+ struct dwc3 *dwc = dep->dwc;
+
+ if (!dep->endpoint.desc || !dwc->pullups_connected ||
+ !dwc->connected)
+ return false;
+
+ if (!list_empty(&dep->pending_list))
+ return true;
+
+ /*
+ * We only need to check the first entry of the started list. We can
+ * assume the completed requests are removed from the started list.
+ */
+ req = next_request(&dep->started_list);
+ if (!req)
+ return false;
+
+ return !dwc3_gadget_ep_request_completed(req);
+}
+
static void dwc3_gadget_endpoint_frame_from_event(struct dwc3_ep *dep,
- const struct dwc3_event_depevt *event)
+ const struct dwc3_event_depevt *event)
{
dep->frame_number = event->parameters;
}
-static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep,
- const struct dwc3_event_depevt *event)
+static bool dwc3_gadget_endpoint_trbs_complete(struct dwc3_ep *dep,
+ const struct dwc3_event_depevt *event, int status)
{
- struct dwc3 *dwc = dep->dwc;
- unsigned status = 0;
- bool stop = false;
-
- dwc3_gadget_endpoint_frame_from_event(dep, event);
-
- if (event->status & DEPEVT_STATUS_BUSERR)
- status = -ECONNRESET;
+ struct dwc3 *dwc = dep->dwc;
+ bool no_started_trb = true;
- if (event->status & DEPEVT_STATUS_MISSED_ISOC) {
- status = -EXDEV;
+ dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);
- if (list_empty(&dep->started_list))
- stop = true;
- }
+ if (dep->flags & DWC3_EP_END_TRANSFER_PENDING)
+ goto out;
- dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);
+ if (!dep->endpoint.desc)
+ return no_started_trb;
- if (stop) {
+ if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
+ list_empty(&dep->started_list) &&
+ (list_empty(&dep->pending_list) || status == -EXDEV))
dwc3_stop_active_transfer(dep, true, true);
- dep->flags = DWC3_EP_ENABLED;
- }
+ else if (dwc3_gadget_ep_should_continue(dep))
+ if (__dwc3_gadget_kick_transfer(dep) == 0)
+ no_started_trb = false;
+out:
/*
* WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround.
* See dwc3_gadget_linksts_change_interrupt() for 1st half.
*/
- if (dwc->revision < DWC3_REVISION_183A) {
- u32 reg;
- int i;
+ if (DWC3_VER_IS_PRIOR(DWC3, 183A)) {
+ u32 reg;
+ int i;
for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) {
dep = dwc->eps[i];
@@ -2331,7 +3215,7 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep,
continue;
if (!list_empty(&dep->started_list))
- return;
+ return no_started_trb;
}
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
@@ -2340,30 +3224,188 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep,
dwc->u1u2 = 0;
}
+
+ return no_started_trb;
+}
+
+static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep,
+ const struct dwc3_event_depevt *event)
+{
+ int status = 0;
+
+ if (!dep->endpoint.desc)
+ return;
+
+ if (usb_endpoint_xfer_isoc(dep->endpoint.desc))
+ dwc3_gadget_endpoint_frame_from_event(dep, event);
+
+ if (event->status & DEPEVT_STATUS_BUSERR)
+ status = -ECONNRESET;
+
+ if (event->status & DEPEVT_STATUS_MISSED_ISOC)
+ status = -EXDEV;
+
+ dwc3_gadget_endpoint_trbs_complete(dep, event, status);
+}
+
+static void dwc3_gadget_endpoint_transfer_complete(struct dwc3_ep *dep,
+ const struct dwc3_event_depevt *event)
+{
+ int status = 0;
+
+ dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
+
+ if (event->status & DEPEVT_STATUS_BUSERR)
+ status = -ECONNRESET;
+
+ if (dwc3_gadget_endpoint_trbs_complete(dep, event, status))
+ dep->flags &= ~DWC3_EP_WAIT_TRANSFER_COMPLETE;
}
static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3_ep *dep,
- const struct dwc3_event_depevt *event)
+ const struct dwc3_event_depevt *event)
{
dwc3_gadget_endpoint_frame_from_event(dep, event);
+
+ /*
+ * The XferNotReady event is generated only once before the endpoint
+ * starts. It will be generated again when END_TRANSFER command is
+ * issued. For some controller versions, the XferNotReady event may be
+ * generated while the END_TRANSFER command is still in process. Ignore
+ * it and wait for the next XferNotReady event after the command is
+ * completed.
+ */
+ if (dep->flags & DWC3_EP_END_TRANSFER_PENDING)
+ return;
+
(void) __dwc3_gadget_start_isoc(dep);
}
+static void dwc3_gadget_endpoint_command_complete(struct dwc3_ep *dep,
+ const struct dwc3_event_depevt *event)
+{
+ u8 cmd = DEPEVT_PARAMETER_CMD(event->parameters);
+
+ if (cmd != DWC3_DEPCMD_ENDTRANSFER)
+ return;
+
+ /*
+ * The END_TRANSFER command will cause the controller to generate a
+ * NoStream Event, and it's not due to the host DP NoStream rejection.
+ * Ignore the next NoStream event.
+ */
+ if (dep->stream_capable)
+ dep->flags |= DWC3_EP_IGNORE_NEXT_NOSTREAM;
+
+ dep->flags &= ~DWC3_EP_END_TRANSFER_PENDING;
+ dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
+ dwc3_gadget_ep_cleanup_cancelled_requests(dep);
+
+ if (dep->flags & DWC3_EP_PENDING_CLEAR_STALL) {
+ struct dwc3 *dwc = dep->dwc;
+
+ dep->flags &= ~DWC3_EP_PENDING_CLEAR_STALL;
+ if (dwc3_send_clear_stall_ep_cmd(dep)) {
+ struct usb_ep *ep0 = &dwc->eps[0]->endpoint;
+
+ dev_err(dwc->dev, "failed to clear STALL on %s\n", dep->name);
+ if (dwc->delayed_status)
+ __dwc3_gadget_ep0_set_halt(ep0, 1);
+ return;
+ }
+
+ dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
+ if (dwc->clear_stall_protocol == dep->number)
+ dwc3_ep0_send_delayed_status(dwc);
+ }
+
+ if ((dep->flags & DWC3_EP_DELAY_START) &&
+ !usb_endpoint_xfer_isoc(dep->endpoint.desc))
+ __dwc3_gadget_kick_transfer(dep);
+
+ dep->flags &= ~DWC3_EP_DELAY_START;
+}
+
+static void dwc3_gadget_endpoint_stream_event(struct dwc3_ep *dep,
+ const struct dwc3_event_depevt *event)
+{
+ struct dwc3 *dwc = dep->dwc;
+
+ if (event->status == DEPEVT_STREAMEVT_FOUND) {
+ dep->flags |= DWC3_EP_FIRST_STREAM_PRIMED;
+ goto out;
+ }
+
+ /* Note: NoStream rejection event param value is 0 and not 0xFFFF */
+ switch (event->parameters) {
+ case DEPEVT_STREAM_PRIME:
+ /*
+ * If the host can properly transition the endpoint state from
+ * idle to prime after a NoStream rejection, there's no need to
+ * force restarting the endpoint to reinitiate the stream. To
+ * simplify the check, assume the host follows the USB spec if
+ * it primed the endpoint more than once.
+ */
+ if (dep->flags & DWC3_EP_FORCE_RESTART_STREAM) {
+ if (dep->flags & DWC3_EP_FIRST_STREAM_PRIMED)
+ dep->flags &= ~DWC3_EP_FORCE_RESTART_STREAM;
+ else
+ dep->flags |= DWC3_EP_FIRST_STREAM_PRIMED;
+ }
+
+ break;
+ case DEPEVT_STREAM_NOSTREAM:
+ if ((dep->flags & DWC3_EP_IGNORE_NEXT_NOSTREAM) ||
+ !(dep->flags & DWC3_EP_FORCE_RESTART_STREAM) ||
+ (!DWC3_MST_CAPABLE(&dwc->hwparams) &&
+ !(dep->flags & DWC3_EP_WAIT_TRANSFER_COMPLETE)))
+ break;
+
+ /*
+ * If the host rejects a stream due to no active stream, by the
+ * USB and xHCI spec, the endpoint will be put back to idle
+ * state. When the host is ready (buffer added/updated), it will
+ * prime the endpoint to inform the usb device controller. This
+ * triggers the device controller to issue ERDY to restart the
+ * stream. However, some hosts don't follow this and keep the
+ * endpoint in the idle state. No prime will come despite host
+ * streams are updated, and the device controller will not be
+ * triggered to generate ERDY to move the next stream data. To
+ * workaround this and maintain compatibility with various
+ * hosts, force to reinitiate the stream until the host is ready
+ * instead of waiting for the host to prime the endpoint.
+ */
+ if (DWC3_VER_IS_WITHIN(DWC32, 100A, ANY)) {
+ unsigned int cmd = DWC3_DGCMD_SET_ENDPOINT_PRIME;
+
+ dwc3_send_gadget_generic_command(dwc, cmd, dep->number);
+ } else {
+ dep->flags |= DWC3_EP_DELAY_START;
+ dwc3_stop_active_transfer(dep, true, true);
+ return;
+ }
+ break;
+ }
+
+out:
+ dep->flags &= ~DWC3_EP_IGNORE_NEXT_NOSTREAM;
+}
+
static void dwc3_endpoint_interrupt(struct dwc3 *dwc,
- const struct dwc3_event_depevt *event)
+ const struct dwc3_event_depevt *event)
{
- struct dwc3_ep *dep;
- u8 epnum = event->endpoint_number;
- u8 cmd;
+ struct dwc3_ep *dep;
+ u8 epnum = event->endpoint_number;
dep = dwc->eps[epnum];
if (!(dep->flags & DWC3_EP_ENABLED)) {
- if (!(dep->flags & DWC3_EP_TRANSFER_STARTED))
+ if ((epnum > 1) && !(dep->flags & DWC3_EP_TRANSFER_STARTED))
return;
/* Handle only EPCMDCMPLT when EP disabled */
- if (event->endpoint_event != DWC3_DEPEVT_EPCMDCMPLT)
+ if ((event->endpoint_event != DWC3_DEPEVT_EPCMDCMPLT) &&
+ !(epnum <= 1 && event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE))
return;
}
@@ -2380,15 +3422,14 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc,
dwc3_gadget_endpoint_transfer_not_ready(dep, event);
break;
case DWC3_DEPEVT_EPCMDCMPLT:
- cmd = DEPEVT_PARAMETER_CMD(event->parameters);
-
- if (cmd == DWC3_DEPCMD_ENDTRANSFER) {
- dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
- dwc3_gadget_ep_cleanup_cancelled_requests(dep);
- }
+ dwc3_gadget_endpoint_command_complete(dep, event);
break;
- case DWC3_DEPEVT_STREAMEVT:
case DWC3_DEPEVT_XFERCOMPLETE:
+ dwc3_gadget_endpoint_transfer_complete(dep, event);
+ break;
+ case DWC3_DEPEVT_STREAMEVT:
+ dwc3_gadget_endpoint_stream_event(dep, event);
+ break;
case DWC3_DEPEVT_RXTXFIFOEVT:
break;
}
@@ -2396,27 +3437,27 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc,
static void dwc3_disconnect_gadget(struct dwc3 *dwc)
{
- if (dwc->gadget_driver && dwc->gadget_driver->disconnect) {
+ if (dwc->async_callbacks && dwc->gadget_driver->disconnect) {
spin_unlock(&dwc->lock);
- dwc->gadget_driver->disconnect(&dwc->gadget);
+ dwc->gadget_driver->disconnect(dwc->gadget);
spin_lock(&dwc->lock);
}
}
static void dwc3_suspend_gadget(struct dwc3 *dwc)
{
- if (dwc->gadget_driver && dwc->gadget_driver->suspend) {
+ if (dwc->async_callbacks && dwc->gadget_driver->suspend) {
spin_unlock(&dwc->lock);
- dwc->gadget_driver->suspend(&dwc->gadget);
+ dwc->gadget_driver->suspend(dwc->gadget);
spin_lock(&dwc->lock);
}
}
static void dwc3_resume_gadget(struct dwc3 *dwc)
{
- if (dwc->gadget_driver && dwc->gadget_driver->resume) {
+ if (dwc->async_callbacks && dwc->gadget_driver->resume) {
spin_unlock(&dwc->lock);
- dwc->gadget_driver->resume(&dwc->gadget);
+ dwc->gadget_driver->resume(dwc->gadget);
spin_lock(&dwc->lock);
}
}
@@ -2426,53 +3467,74 @@ static void dwc3_reset_gadget(struct dwc3 *dwc)
if (!dwc->gadget_driver)
return;
- if (dwc->gadget.speed != USB_SPEED_UNKNOWN) {
+ if (dwc->async_callbacks && dwc->gadget->speed != USB_SPEED_UNKNOWN) {
spin_unlock(&dwc->lock);
- usb_gadget_udc_reset(&dwc->gadget, dwc->gadget_driver);
+ usb_gadget_udc_reset(dwc->gadget, dwc->gadget_driver);
spin_lock(&dwc->lock);
}
}
-static void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force,
- bool interrupt)
+void dwc3_stop_active_transfer(struct dwc3_ep *dep, bool force,
+ bool interrupt)
{
struct dwc3 *dwc = dep->dwc;
- struct dwc3_gadget_ep_cmd_params params;
- u32 cmd;
- int ret;
- if (!(dep->flags & DWC3_EP_TRANSFER_STARTED))
+ /*
+ * Only issue End Transfer command to the control endpoint of a started
+ * Data Phase. Typically we should only do so in error cases such as
+ * invalid/unexpected direction as described in the control transfer
+ * flow of the programming guide.
+ */
+ if (dep->number <= 1 && dwc->ep0state != EP0_DATA_PHASE)
+ return;
+
+ if (interrupt && (dep->flags & DWC3_EP_DELAY_STOP))
+ return;
+
+ if (!(dep->flags & DWC3_EP_TRANSFER_STARTED) ||
+ (dep->flags & DWC3_EP_END_TRANSFER_PENDING))
return;
/*
+ * If a Setup packet is received but yet to DMA out, the controller will
+ * not process the End Transfer command of any endpoint. Polling of its
+ * DEPCMD.CmdAct may block setting up TRB for Setup packet, causing a
+ * timeout. Delay issuing the End Transfer command until the Setup TRB is
+ * prepared.
+ */
+ if (dwc->ep0state != EP0_SETUP_PHASE && !dwc->delayed_status) {
+ dep->flags |= DWC3_EP_DELAY_STOP;
+ return;
+ }
+
+ /*
* NOTICE: We are violating what the Databook says about the
* EndTransfer command. Ideally we would _always_ wait for the
* EndTransfer Command Completion IRQ, but that's causing too
* much trouble synchronizing between us and gadget driver.
*
* We have discussed this with the IP Provider and it was
- * suggested to giveback all requests here, but give HW some
- * extra time to synchronize with the interconnect. We're using
- * an arbitraty 100us delay for that.
+ * suggested to giveback all requests here.
*
* Note also that a similar handling was tested by Synopsys
* (thanks a lot Paul) and nothing bad has come out of it.
- * In short, what we're doing is:
+ * In short, what we're doing is issuing EndTransfer with
+ * CMDIOC bit set and delay kicking transfer until the
+ * EndTransfer command had completed.
+ *
+ * As of IP version 3.10a of the DWC_usb3 IP, the controller
+ * supports a mode to work around the above limitation. The
+ * software can poll the CMDACT bit in the DEPCMD register
+ * after issuing a EndTransfer command. This mode is enabled
+ * by writing GUCTL2[14]. This polling is already done in the
+ * dwc3_send_gadget_ep_cmd() function so if the mode is
+ * enabled, the EndTransfer command will have completed upon
+ * returning from this function.
*
- * - Issue EndTransfer WITH CMDIOC bit set
- * - Wait 100us
+ * This mode is NOT available on the DWC_usb31 IP.
*/
- cmd = DWC3_DEPCMD_ENDTRANSFER;
- cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0;
- cmd |= DWC3_DEPCMD_CMDIOC;
- cmd |= DWC3_DEPCMD_PARAM(dep->resource_index);
- memset(&params, 0, sizeof(params));
- ret = dwc3_send_gadget_ep_cmd(dep, cmd, &params);
- dep->resource_index = 0;
-
- if (dwc3_is_usb31(dwc) || dwc->revision < DWC3_REVISION_310A)
- udelay(100);
+ __dwc3_stop_active_transfer(dep, force, interrupt);
}
static void dwc3_clear_stall_all_ep(struct dwc3 *dwc)
@@ -2481,6 +3543,7 @@ static void dwc3_clear_stall_all_ep(struct dwc3 *dwc)
for (epnum = 1; epnum < DWC3_ENDPOINTS_NUM; epnum++) {
struct dwc3_ep *dep;
+ int ret;
dep = dwc->eps[epnum];
if (!dep)
@@ -2491,35 +3554,54 @@ static void dwc3_clear_stall_all_ep(struct dwc3 *dwc)
dep->flags &= ~DWC3_EP_STALL;
- dwc3_send_clear_stall_ep_cmd(dep);
+ ret = dwc3_send_clear_stall_ep_cmd(dep);
+ WARN_ON_ONCE(ret);
}
}
static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
{
- int reg;
+ int reg;
+
+ dwc3_gadget_set_link_state(dwc, DWC3_LINK_STATE_RX_DET);
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_INITU1ENA;
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
-
reg &= ~DWC3_DCTL_INITU2ENA;
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ dwc3_gadget_dctl_write_safe(dwc, reg);
+
+ dwc->connected = false;
dwc3_disconnect_gadget(dwc);
- dwc->gadget.speed = USB_SPEED_UNKNOWN;
+ dwc->gadget->speed = USB_SPEED_UNKNOWN;
dwc->setup_packet_pending = false;
- usb_gadget_set_state(&dwc->gadget, USB_STATE_NOTATTACHED);
+ usb_gadget_set_state(dwc->gadget, USB_STATE_NOTATTACHED);
- dwc->connected = false;
+ if (dwc->ep0state != EP0_SETUP_PHASE) {
+ unsigned int dir;
+
+ dir = !!dwc->ep0_expect_in;
+ if (dwc->ep0state == EP0_DATA_PHASE)
+ dwc3_ep0_end_control_data(dwc, dwc->eps[dir]);
+ else
+ dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]);
+ dwc3_ep0_stall_and_restart(dwc);
+ }
}
static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
{
- u32 reg;
+ u32 reg;
- dwc->connected = true;
+ /*
+ * Ideally, dwc3_reset_gadget() would trigger the function
+ * drivers to stop any active transfers through ep disable.
+ * However, for functions which defer ep disable, such as mass
+ * storage, we will need to rely on the call to stop active
+ * transfers here, and avoid allowing of request queuing.
+ */
+ dwc->connected = false;
/*
* WORKAROUND: DWC3 revisions <1.88a have an issue which
@@ -2547,16 +3629,45 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
* STAR#9000466709: RTL: Device : Disconnect event not
* generated if setup packet pending in FIFO
*/
- if (dwc->revision < DWC3_REVISION_188A) {
+ if (DWC3_VER_IS_PRIOR(DWC3, 188A)) {
if (dwc->setup_packet_pending)
dwc3_gadget_disconnect_interrupt(dwc);
}
dwc3_reset_gadget(dwc);
+ /*
+ * From SNPS databook section 8.1.2, the EP0 should be in setup
+ * phase. So ensure that EP0 is in setup phase by issuing a stall
+ * and restart if EP0 is not in setup phase.
+ */
+ if (dwc->ep0state != EP0_SETUP_PHASE) {
+ unsigned int dir;
+
+ dir = !!dwc->ep0_expect_in;
+ if (dwc->ep0state == EP0_DATA_PHASE)
+ dwc3_ep0_end_control_data(dwc, dwc->eps[dir]);
+ else
+ dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]);
+
+ dwc->eps[0]->trb_enqueue = 0;
+ dwc->eps[1]->trb_enqueue = 0;
+
+ dwc3_ep0_stall_and_restart(dwc);
+ }
+
+ /*
+ * In the Synopsis DesignWare Cores USB3 Databook Rev. 3.30a
+ * Section 4.1.2 Table 4-2, it states that during a USB reset, the SW
+ * needs to ensure that it sends "a DEPENDXFER command for any active
+ * transfers."
+ */
+ dwc3_stop_active_transfers(dwc);
+ dwc->connected = true;
+
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_TSTCTRL_MASK;
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ dwc3_gadget_dctl_write_safe(dwc, reg);
dwc->test_mode = false;
dwc3_clear_stall_all_ep(dwc);
@@ -2568,22 +3679,45 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
{
- struct dwc3_ep *dep;
- int ret;
- u32 reg;
- u8 speed;
+ struct dwc3_ep *dep;
+ int ret;
+ u32 reg;
+ u8 lanes = 1;
+ u8 speed;
+
+ if (!dwc->softconnect)
+ return;
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
speed = reg & DWC3_DSTS_CONNECTSPD;
dwc->speed = speed;
+ if (DWC3_IP_IS(DWC32))
+ lanes = DWC3_DSTS_CONNLANES(reg) + 1;
+
+ dwc->gadget->ssp_rate = USB_SSP_GEN_UNKNOWN;
+
+ /*
+ * RAMClkSel is reset to 0 after USB reset, so it must be reprogrammed
+ * each time on Connect Done.
+ *
+ * Currently we always use the reset value. If any platform
+ * wants to set this to a different value, we need to add a
+ * setting and update GCTL.RAMCLKSEL here.
+ */
+
switch (speed) {
case DWC3_DSTS_SUPERSPEED_PLUS:
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
- dwc->gadget.ep0->maxpacket = 512;
- dwc->gadget.speed = USB_SPEED_SUPER_PLUS;
+ dwc->gadget->ep0->maxpacket = 512;
+ dwc->gadget->speed = USB_SPEED_SUPER_PLUS;
+
+ if (lanes > 1)
+ dwc->gadget->ssp_rate = USB_SSP_GEN_2x2;
+ else
+ dwc->gadget->ssp_rate = USB_SSP_GEN_2x1;
break;
- case DWC3_DCFG_SUPERSPEED:
+ case DWC3_DSTS_SUPERSPEED:
/*
* WORKAROUND: DWC3 revisions <1.90a have an issue which
* would cause a missing USB3 Reset event.
@@ -2597,36 +3731,36 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
* STAR#9000483510: RTL: SS : USB3 reset event may
* not be generated always when the link enters poll
*/
- if (dwc->revision < DWC3_REVISION_190A)
+ if (DWC3_VER_IS_PRIOR(DWC3, 190A))
dwc3_gadget_reset_interrupt(dwc);
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
- dwc->gadget.ep0->maxpacket = 512;
- dwc->gadget.speed = USB_SPEED_SUPER;
+ dwc->gadget->ep0->maxpacket = 512;
+ dwc->gadget->speed = USB_SPEED_SUPER;
+
+ if (lanes > 1) {
+ dwc->gadget->speed = USB_SPEED_SUPER_PLUS;
+ dwc->gadget->ssp_rate = USB_SSP_GEN_1x2;
+ }
break;
- case DWC3_DCFG_HIGHSPEED:
+ case DWC3_DSTS_HIGHSPEED:
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64);
- dwc->gadget.ep0->maxpacket = 64;
- dwc->gadget.speed = USB_SPEED_HIGH;
+ dwc->gadget->ep0->maxpacket = 64;
+ dwc->gadget->speed = USB_SPEED_HIGH;
break;
- case DWC3_DCFG_FULLSPEED:
- case DWC3_DCFG_FULLSPEED1:
+ case DWC3_DSTS_FULLSPEED:
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64);
- dwc->gadget.ep0->maxpacket = 64;
- dwc->gadget.speed = USB_SPEED_FULL;
- break;
- case DWC3_DCFG_LOWSPEED:
- dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8);
- dwc->gadget.ep0->maxpacket = 8;
- dwc->gadget.speed = USB_SPEED_LOW;
+ dwc->gadget->ep0->maxpacket = 64;
+ dwc->gadget->speed = USB_SPEED_FULL;
break;
}
- dwc->eps[1]->endpoint.maxpacket = dwc->gadget.ep0->maxpacket;
+ dwc->eps[1]->endpoint.maxpacket = dwc->gadget->ep0->maxpacket;
/* Enable USB2 LPM Capability */
- if ((dwc->revision > DWC3_REVISION_194A) &&
+ if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A) &&
+ !dwc->usb2_gadget_lpm_disable &&
(speed != DWC3_DSTS_SUPERSPEED) &&
(speed != DWC3_DSTS_SUPERSPEED_PLUS)) {
reg = dwc3_readl(dwc->regs, DWC3_DCFG);
@@ -2636,7 +3770,8 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN);
- reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold);
+ reg |= DWC3_DCTL_HIRD_THRES(dwc->hird_threshold |
+ (dwc->is_utmi_l1_suspend << 4));
/*
* When dwc3 revisions >= 2.40a, LPM Erratum is enabled and
@@ -2644,17 +3779,23 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
* BESL value in the LPM token is less than or equal to LPM
* NYET threshold.
*/
- if (dwc->revision < DWC3_REVISION_240A && dwc->has_lpm_erratum)
- WARN(true, "LPM Erratum not available on dwc3 revisisions < 2.40a\n");
+ WARN_ONCE(DWC3_VER_IS_PRIOR(DWC3, 240A) && dwc->has_lpm_erratum,
+ "LPM Erratum not available on dwc3 revisions < 2.40a\n");
- if (dwc->has_lpm_erratum && dwc->revision >= DWC3_REVISION_240A)
- reg |= DWC3_DCTL_LPM_ERRATA(dwc->lpm_nyet_threshold);
+ if (dwc->has_lpm_erratum && !DWC3_VER_IS_PRIOR(DWC3, 240A))
+ reg |= DWC3_DCTL_NYET_THRES(dwc->lpm_nyet_threshold);
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ dwc3_gadget_dctl_write_safe(dwc, reg);
} else {
+ if (dwc->usb2_gadget_lpm_disable) {
+ reg = dwc3_readl(dwc->regs, DWC3_DCFG);
+ reg &= ~DWC3_DCFG_LPM_CAP;
+ dwc3_writel(dwc->regs, DWC3_DCFG, reg);
+ }
+
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_HIRD_THRES_MASK;
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ dwc3_gadget_dctl_write_safe(dwc, reg);
}
dep = dwc->eps[0];
@@ -2687,15 +3828,18 @@ static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc)
* implemented.
*/
- if (dwc->gadget_driver && dwc->gadget_driver->resume)
- dwc->gadget_driver->resume(&dwc->gadget);
+ if (dwc->async_callbacks && dwc->gadget_driver->resume) {
+ spin_unlock(&dwc->lock);
+ dwc->gadget_driver->resume(dwc->gadget);
+ spin_lock(&dwc->lock);
+ }
}
static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
- unsigned int evtinfo)
+ unsigned int evtinfo)
{
- enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK;
- unsigned int pwropt;
+ enum dwc3_link_state next = evtinfo & DWC3_LINK_STATE_MASK;
+ unsigned int pwropt;
/*
* WORKAROUND: DWC3 < 2.50a have an issue when configured without
@@ -2715,11 +3859,10 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
* operational mode
*/
pwropt = DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1);
- if ((dwc->revision < DWC3_REVISION_250A) &&
- (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) {
+ if (DWC3_VER_IS_PRIOR(DWC3, 250A) &&
+ (pwropt != DWC3_GHWPARAMS1_EN_PWROPT_HIB)) {
if ((dwc->link_state == DWC3_LINK_STATE_U3) &&
- (next == DWC3_LINK_STATE_RESUME)) {
- dev_dbg(dwc->dev, "ignoring transition U3 -> Resume\n");
+ (next == DWC3_LINK_STATE_RESUME)) {
return;
}
}
@@ -2742,10 +3885,10 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
* STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us
* core send LGO_Ux entering U0
*/
- if (dwc->revision < DWC3_REVISION_183A) {
+ if (DWC3_VER_IS_PRIOR(DWC3, 183A)) {
if (next == DWC3_LINK_STATE_U0) {
- u32 u1u2;
- u32 reg;
+ u32 u1u2;
+ u32 reg;
switch (dwc->link_state) {
case DWC3_LINK_STATE_U1:
@@ -2761,7 +3904,7 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
reg &= ~u1u2;
- dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ dwc3_gadget_dctl_write_safe(dwc, reg);
break;
default:
/* do nothing */
@@ -2777,7 +3920,7 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
break;
case DWC3_LINK_STATE_U2:
case DWC3_LINK_STATE_U3:
- //dwc3_suspend_gadget(dwc);
+ dwc3_suspend_gadget(dwc);
break;
case DWC3_LINK_STATE_RESUME:
dwc3_resume_gadget(dwc);
@@ -2802,12 +3945,12 @@ static void dwc3_gadget_suspend_interrupt(struct dwc3 *dwc,
}
static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc,
- unsigned int evtinfo)
+ unsigned int evtinfo)
{
- unsigned int is_ss = evtinfo & (1UL << 4);
+ unsigned int is_ss = evtinfo & BIT(4);
- /**
- * WORKAROUND: DWC3 revison 2.20a with hibernation support
+ /*
+ * WORKAROUND: DWC3 revision 2.20a with hibernation support
* have a known issue which can cause USB CV TD.9.23 to fail
* randomly.
*
@@ -2826,9 +3969,8 @@ static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc,
}
static void dwc3_gadget_interrupt(struct dwc3 *dwc,
- const struct dwc3_event_devt *event)
+ const struct dwc3_event_devt *event)
{
-
switch (event->type) {
case DWC3_DEVICE_EVENT_DISCONNECT:
dwc3_gadget_disconnect_interrupt(dwc);
@@ -2843,96 +3985,154 @@ static void dwc3_gadget_interrupt(struct dwc3 *dwc,
dwc3_gadget_wakeup_interrupt(dwc);
break;
case DWC3_DEVICE_EVENT_HIBER_REQ:
- if (!dwc->has_hibernation) {
- WARN(1 ,"unexpected hibernation event\n");
+ if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation,
+ "unexpected hibernation event\n"))
break;
- }
+
dwc3_gadget_hibernation_interrupt(dwc, event->event_info);
break;
case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
dwc3_gadget_linksts_change_interrupt(dwc, event->event_info);
break;
- case DWC3_DEVICE_EVENT_EOPF:
- dev_dbg(dwc->dev, "End of Periodic Frame\n");
+ case DWC3_DEVICE_EVENT_SUSPEND:
/* It changed to be suspend event for version 2.30a and above */
- if (dwc->revision >= DWC3_REVISION_230A) {
+ if (!DWC3_VER_IS_PRIOR(DWC3, 230A)) {
/*
* Ignore suspend event until the gadget enters into
* USB_STATE_CONFIGURED state.
*/
- if (dwc->gadget.state >= USB_STATE_CONFIGURED)
+ if (dwc->gadget->state >= USB_STATE_CONFIGURED)
dwc3_gadget_suspend_interrupt(dwc,
event->event_info);
}
break;
case DWC3_DEVICE_EVENT_SOF:
- dev_dbg(dwc->dev, "Start of Periodic Frame\n");
- break;
case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
- dev_dbg(dwc->dev, "Erratic Error\n");
- break;
case DWC3_DEVICE_EVENT_CMD_CMPL:
- dev_dbg(dwc->dev, "Command Complete\n");
- break;
case DWC3_DEVICE_EVENT_OVERFLOW:
- dev_dbg(dwc->dev, "Overflow\n");
break;
default:
- dev_dbg(dwc->dev, "UNKNOWN IRQ %d\n", event->type);
+ dev_warn(dwc->dev, "UNKNOWN IRQ %d\n", event->type);
}
}
static void dwc3_process_event_entry(struct dwc3 *dwc,
- const union dwc3_event *event)
+ const union dwc3_event *event)
{
if (!event->type.is_devspec)
dwc3_endpoint_interrupt(dwc, &event->depevt);
else if (event->type.type == DWC3_EVENT_TYPE_DEV)
dwc3_gadget_interrupt(dwc, &event->devt);
+ else
+ dev_err(dwc->dev, "UNKNOWN IRQ type %d\n", event->raw);
}
-static void dwc3_gadget_poll(struct usb_gadget * g)
+static irqreturn_t dwc3_process_event_buf(struct dwc3_event_buffer *evt)
{
- struct dwc3 *dwc = gadget_to_dwc(g);
- struct dwc3_event_buffer *evt = dwc->ev_buf;
+ struct dwc3 *dwc = evt->dwc;
+ irqreturn_t ret = IRQ_NONE;
+ int left;
+
+ left = evt->count;
+
+ if (!(evt->flags & DWC3_EVENT_PENDING))
+ return IRQ_NONE;
+
+ while (left > 0) {
+ union dwc3_event event;
+
+ event.raw = *(u32 *) (evt->cache + evt->lpos);
+
+ dwc3_process_event_entry(dwc, &event);
+
+ /*
+ * FIXME we wrap around correctly to the next entry as
+ * almost all entries are 4 bytes in size. There is one
+ * entry which has 12 bytes which is a regular entry
+ * followed by 8 bytes data. ATM I don't know how
+ * things are organized if we get next to the a
+ * boundary so I worry about that once we try to handle
+ * that.
+ */
+ evt->lpos = (evt->lpos + 4) % evt->length;
+ left -= 4;
+ }
+
+ evt->count = 0;
+ ret = IRQ_HANDLED;
+
+ /* Unmask interrupt */
+ dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),
+ DWC3_GEVNTSIZ_SIZE(evt->length));
+
+ if (dwc->imod_interval) {
+ dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), DWC3_GEVNTCOUNT_EHB);
+ dwc3_writel(dwc->regs, DWC3_DEV_IMOD(0), dwc->imod_interval);
+ }
+
+ /* Keep the clearing of DWC3_EVENT_PENDING at the end */
+ evt->flags &= ~DWC3_EVENT_PENDING;
+
+ return ret;
+}
+
+static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt)
+{
+ struct dwc3 *dwc = evt->dwc;
u32 amount;
u32 count;
- void *buf;
- int pos = 0;
+
+ /*
+ * With PCIe legacy interrupt, test shows that top-half irq handler can
+ * be called again after HW interrupt deassertion. Check if bottom-half
+ * irq event handler completes before caching new event to prevent
+ * losing events.
+ */
+ if (evt->flags & DWC3_EVENT_PENDING)
+ return IRQ_HANDLED;
count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));
count &= DWC3_GEVNTCOUNT_MASK;
if (!count)
- return;
+ return IRQ_NONE;
- buf = xzalloc(count);
+ evt->count = count;
+ evt->flags |= DWC3_EVENT_PENDING;
+
+ /* Mask interrupt */
+ dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),
+ DWC3_GEVNTSIZ_INTMASK | DWC3_GEVNTSIZ_SIZE(evt->length));
amount = min(count, evt->length - evt->lpos);
- memcpy_fromio(buf, evt->buf + evt->lpos, amount);
+ memcpy_fromio(evt->cache + evt->lpos, evt->buf + evt->lpos, amount);
if (amount < count)
- memcpy_fromio(buf + amount, evt->buf, count - amount);
-
- evt->lpos = (evt->lpos + count) % evt->length;
+ memcpy_fromio(evt->cache, evt->buf, count - amount);
dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), count);
- while (count > 0) {
- union dwc3_event event;
+ dwc3_process_event_buf(evt);
- event.raw = *(u32 *)(buf + pos);
+ return IRQ_HANDLED;
+}
- dwc3_process_event_entry(dwc, &event);
+static void dwc3_gadget_poll(struct usb_gadget *g)
+{
+ struct dwc3 *dwc = gadget_to_dwc(g);
+ struct dwc3_event_buffer *evt = dwc->ev_buf;
- count -= 4;
- pos += 4;
- }
+ dwc3_check_event_buf(evt);
+}
+
+static void dwc_gadget_release(struct device *dev)
+{
+ struct usb_gadget *gadget = container_of(dev, struct usb_gadget, dev);
- free(buf);
+ kfree(gadget);
}
/**
- * dwc3_gadget_init - Initializes gadget related registers
+ * dwc3_gadget_init - initializes gadget related registers
* @dwc: pointer to our controller context structure
*
* Returns 0 on success otherwise negative errno.
@@ -2940,46 +4140,69 @@ static void dwc3_gadget_poll(struct usb_gadget * g)
int dwc3_gadget_init(struct dwc3 *dwc)
{
int ret;
+ struct device *dev;
dwc->ep0_trb = dma_alloc_coherent(sizeof(*dwc->ep0_trb) * 2,
- &dwc->ep0_trb_addr);
+ &dwc->ep0_trb_addr);
if (!dwc->ep0_trb) {
dev_err(dwc->dev, "failed to allocate ep0 trb\n");
ret = -ENOMEM;
- goto err1;
+ goto err0;
}
- dwc->setup_buf = xzalloc(DWC3_EP0_SETUP_SIZE);
+ dwc->setup_buf = kzalloc(DWC3_EP0_SETUP_SIZE, GFP_KERNEL);
if (!dwc->setup_buf) {
ret = -ENOMEM;
- goto err2;
+ goto err1;
}
- dwc->bounce = dma_alloc_coherent(DWC3_BOUNCE_SIZE,
- &dwc->bounce_addr);
+ dwc->bounce = dma_alloc_coherent(DWC3_BOUNCE_SIZE, &dwc->bounce_addr);
if (!dwc->bounce) {
- dev_err(dwc->dev, "failed to allocate ep0 bounce buffer\n");
+ ret = -ENOMEM;
+ goto err2;
+ }
+
+ init_completion(&dwc->ep0_in_setup);
+ dwc->gadget = kzalloc(sizeof(struct usb_gadget), GFP_KERNEL);
+ if (!dwc->gadget) {
ret = -ENOMEM;
goto err3;
}
- dwc->gadget.ops = &dwc3_gadget_ops;
- dwc->gadget.max_speed = USB_SPEED_SUPER;
- dwc->gadget.speed = USB_SPEED_UNKNOWN;
- dwc->gadget.name = "dwc3-gadget";
+
+ usb_initialize_gadget(dwc->dev, dwc->gadget, dwc_gadget_release);
+ dev = &dwc->gadget->dev;
+ dev->platform_data = dwc;
+ dwc->gadget->ops = &dwc3_gadget_ops;
+ dwc->gadget->speed = USB_SPEED_UNKNOWN;
+ dwc->gadget->ssp_rate = USB_SSP_GEN_UNKNOWN;
+ dwc->gadget->sg_supported = true;
+ dwc->gadget->name = "dwc3-gadget";
+ dwc->gadget->lpm_capable = !dwc->usb2_gadget_lpm_disable;
/*
- * Per databook, DWC3 needs buffer size to be aligned to MaxPacketSize
- * on ep out.
+ * FIXME We might be setting max_speed to <SUPER, however versions
+ * <2.20a of dwc3 have an issue with metastability (documented
+ * elsewhere in this driver) which tells us we can't set max speed to
+ * anything lower than SUPER.
+ *
+ * Because gadget.max_speed is only used by composite.c and function
+ * drivers (i.e. it won't go into dwc3's registers) we are allowing this
+ * to happen so we avoid sending SuperSpeed Capability descriptor
+ * together with our BOS descriptor as that could confuse host into
+ * thinking we can handle super speed.
+ *
+ * Note that, in fact, we won't even support GetBOS requests when speed
+ * is less than super speed because we don't have means, yet, to tell
+ * composite.c that we are USB 2.0 + LPM ECN.
*/
- dwc->gadget.quirk_ep_out_aligned_size = true;
-
- if (dwc->revision < DWC3_REVISION_220A &&
+ if (DWC3_VER_IS_PRIOR(DWC3, 220A) &&
!dwc->dis_metastability_quirk)
dev_info(dwc->dev, "changing max_speed on rev %08x\n",
dwc->revision);
- dwc->gadget.max_speed = dwc->maximum_speed;
+ dwc->gadget->max_speed = dwc->maximum_speed;
+ dwc->gadget->max_ssp_rate = dwc->max_ssp_rate;
/*
* REVISIT: Here we should clear all pending IRQs to be
@@ -2990,26 +4213,47 @@ int dwc3_gadget_init(struct dwc3 *dwc)
if (ret)
goto err4;
- ret = usb_add_gadget_udc((struct device_d *)dwc->dev, &dwc->gadget);
+ ret = usb_add_gadget(dwc->gadget);
if (ret) {
- dev_err(dwc->dev, "failed to register udc\n");
- goto err4;
+ dev_err(dwc->dev, "failed to add gadget\n");
+ goto err5;
}
- dwc3_gadget_set_speed(dwc, dwc->maximum_speed);
+ if (DWC3_IP_IS(DWC32) && dwc->maximum_speed == USB_SPEED_SUPER_PLUS)
+ dwc3_gadget_set_ssp_rate(dwc->gadget, dwc->max_ssp_rate);
+ else
+ dwc3_gadget_set_speed(dwc->gadget, dwc->maximum_speed);
return 0;
-err4:
+err5:
dwc3_gadget_free_endpoints(dwc);
+err4:
+ usb_put_gadget(dwc->gadget);
+ dwc->gadget = NULL;
err3:
- dma_free_coherent(dwc->bounce, 0, DWC3_BOUNCE_SIZE);
+ dma_free_coherent(dwc->bounce, dwc->bounce_addr, DWC3_BOUNCE_SIZE);
err2:
kfree(dwc->setup_buf);
err1:
- dma_free_coherent(dwc->ep0_trb, 0, sizeof(*dwc->ep0_trb) * 2);
+ dma_free_coherent(dwc->ep0_trb, dwc->ep0_trb_addr, sizeof(*dwc->ep0_trb) * 2);
+err0:
return ret;
}
+
+/* -------------------------------------------------------------------------- */
+
+void dwc3_gadget_exit(struct dwc3 *dwc)
+{
+ if (!dwc->gadget)
+ return;
+
+ usb_del_gadget_udc(dwc->gadget);
+ dwc3_gadget_free_endpoints(dwc);
+ dma_free_coherent(dwc->bounce, dwc->bounce_addr, DWC3_BOUNCE_SIZE);
+ kfree(dwc->setup_buf);
+ dma_free_coherent(dwc->ep0_trb, dwc->ep0_trb_addr, sizeof(*dwc->ep0_trb) * 2);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 19:46:33 +0000