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path: root/drivers/usb/chipidea/udc.c
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Diffstat (limited to 'drivers/usb/chipidea/udc.c')
-rw-r--r--drivers/usb/chipidea/udc.c98
1 files changed, 79 insertions, 19 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index c7a032a4f0c5..2f45bba8561d 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -78,8 +78,7 @@ static inline int ep_to_bit(struct ci13xxx *ci, int n)
}
/**
- * hw_device_state: enables/disables interrupts & starts/stops device (execute
- * without interruption)
+ * hw_device_state: enables/disables interrupts (execute without interruption)
* @dma: 0 => disable, !0 => enable and set dma engine
*
* This function returns an error code
@@ -91,9 +90,7 @@ static int hw_device_state(struct ci13xxx *ci, u32 dma)
/* interrupt, error, port change, reset, sleep/suspend */
hw_write(ci, OP_USBINTR, ~0,
USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
- hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
} else {
- hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
hw_write(ci, OP_USBINTR, ~0, 0);
}
return 0;
@@ -308,6 +305,18 @@ static u32 hw_test_and_clear_intr_active(struct ci13xxx *ci)
return reg;
}
+static void hw_enable_vbus_intr(struct ci13xxx *ci)
+{
+ hw_write(ci, OP_OTGSC, OTGSC_AVVIS, OTGSC_AVVIS);
+ hw_write(ci, OP_OTGSC, OTGSC_AVVIE, OTGSC_AVVIE);
+ queue_work(ci->wq, &ci->vbus_work);
+}
+
+static void hw_disable_vbus_intr(struct ci13xxx *ci)
+{
+ hw_write(ci, OP_OTGSC, OTGSC_AVVIE, 0);
+}
+
/**
* hw_test_and_clear_setup_guard: test & clear setup guard (execute without
* interruption)
@@ -374,6 +383,16 @@ static int hw_usb_reset(struct ci13xxx *ci)
return 0;
}
+static void vbus_work(struct work_struct *work)
+{
+ struct ci13xxx *ci = container_of(work, struct ci13xxx, vbus_work);
+
+ if (hw_read(ci, OP_OTGSC, OTGSC_AVV))
+ usb_gadget_vbus_connect(&ci->gadget);
+ else
+ usb_gadget_vbus_disconnect(&ci->gadget);
+}
+
/******************************************************************************
* UTIL block
*****************************************************************************/
@@ -774,10 +793,7 @@ __acquires(mEp->lock)
{
struct ci13xxx_req *mReq, *mReqTemp;
struct ci13xxx_ep *mEpTemp = mEp;
- int uninitialized_var(retval);
-
- if (list_empty(&mEp->qh.queue))
- return -EINVAL;
+ int retval = 0;
list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue,
queue) {
@@ -1376,6 +1392,7 @@ static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
if (is_active) {
pm_runtime_get_sync(&_gadget->dev);
hw_device_reset(ci, USBMODE_CM_DC);
+ hw_enable_vbus_intr(ci);
hw_device_state(ci, ci->ep0out->qh.dma);
} else {
hw_device_state(ci, 0);
@@ -1420,6 +1437,21 @@ static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
return -ENOTSUPP;
}
+/* Change Data+ pullup status
+ * this func is used by usb_gadget_connect/disconnet
+ */
+static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on)
+{
+ struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
+
+ if (is_on)
+ hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
+ else
+ hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
+
+ return 0;
+}
+
static int ci13xxx_start(struct usb_gadget *gadget,
struct usb_gadget_driver *driver);
static int ci13xxx_stop(struct usb_gadget *gadget,
@@ -1432,6 +1464,7 @@ static int ci13xxx_stop(struct usb_gadget *gadget,
static const struct usb_gadget_ops usb_gadget_ops = {
.vbus_session = ci13xxx_vbus_session,
.wakeup = ci13xxx_wakeup,
+ .pullup = ci13xxx_pullup,
.vbus_draw = ci13xxx_vbus_draw,
.udc_start = ci13xxx_start,
.udc_stop = ci13xxx_stop,
@@ -1455,7 +1488,12 @@ static int init_eps(struct ci13xxx *ci)
mEp->ep.name = mEp->name;
mEp->ep.ops = &usb_ep_ops;
- mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
+ /*
+ * for ep0: maxP defined in desc, for other
+ * eps, maxP is set by epautoconfig() called
+ * by gadget layer
+ */
+ mEp->ep.maxpacket = (unsigned short)~0;
INIT_LIST_HEAD(&mEp->qh.queue);
mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL,
@@ -1475,6 +1513,7 @@ static int init_eps(struct ci13xxx *ci)
else
ci->ep0in = mEp;
+ mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
continue;
}
@@ -1484,6 +1523,17 @@ static int init_eps(struct ci13xxx *ci)
return retval;
}
+static void destroy_eps(struct ci13xxx *ci)
+{
+ int i;
+
+ for (i = 0; i < ci->hw_ep_max; i++) {
+ struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
+
+ dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma);
+ }
+}
+
/**
* ci13xxx_start: register a gadget driver
* @gadget: our gadget
@@ -1517,8 +1567,10 @@ static int ci13xxx_start(struct usb_gadget *gadget,
pm_runtime_get_sync(&ci->gadget.dev);
if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) {
if (ci->vbus_active) {
- if (ci->platdata->flags & CI13XXX_REGS_SHARED)
+ if (ci->platdata->flags & CI13XXX_REGS_SHARED) {
hw_device_reset(ci, USBMODE_CM_DC);
+ hw_enable_vbus_intr(ci);
+ }
} else {
pm_runtime_put_sync(&ci->gadget.dev);
goto done;
@@ -1624,6 +1676,13 @@ static irqreturn_t udc_irq(struct ci13xxx *ci)
} else {
retval = IRQ_NONE;
}
+
+ intr = hw_read(ci, OP_OTGSC, ~0);
+ hw_write(ci, OP_OTGSC, ~0, intr);
+
+ if (intr & (OTGSC_AVVIE & OTGSC_AVVIS))
+ queue_work(ci->wq, &ci->vbus_work);
+
spin_unlock(&ci->lock);
return retval;
@@ -1691,7 +1750,7 @@ static int udc_start(struct ci13xxx *ci)
if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) {
if (ci->transceiver == NULL) {
retval = -ENODEV;
- goto free_pools;
+ goto destroy_eps;
}
}
@@ -1699,6 +1758,7 @@ static int udc_start(struct ci13xxx *ci)
retval = hw_device_reset(ci, USBMODE_CM_DC);
if (retval)
goto put_transceiver;
+ hw_enable_vbus_intr(ci);
}
retval = device_register(&ci->gadget.dev);
@@ -1729,7 +1789,7 @@ static int udc_start(struct ci13xxx *ci)
remove_trans:
if (!IS_ERR_OR_NULL(ci->transceiver)) {
- otg_set_peripheral(ci->transceiver->otg, &ci->gadget);
+ otg_set_peripheral(ci->transceiver->otg, NULL);
if (ci->global_phy)
usb_put_phy(ci->transceiver);
}
@@ -1742,6 +1802,8 @@ unreg_device:
put_transceiver:
if (!IS_ERR_OR_NULL(ci->transceiver) && ci->global_phy)
usb_put_phy(ci->transceiver);
+destroy_eps:
+ destroy_eps(ci);
free_pools:
dma_pool_destroy(ci->td_pool);
free_qh_pool:
@@ -1756,18 +1818,15 @@ free_qh_pool:
*/
static void udc_stop(struct ci13xxx *ci)
{
- int i;
-
if (ci == NULL)
return;
- usb_del_gadget_udc(&ci->gadget);
+ hw_disable_vbus_intr(ci);
+ cancel_work_sync(&ci->vbus_work);
- for (i = 0; i < ci->hw_ep_max; i++) {
- struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
+ usb_del_gadget_udc(&ci->gadget);
- dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma);
- }
+ destroy_eps(ci);
dma_pool_destroy(ci->td_pool);
dma_pool_destroy(ci->qh_pool);
@@ -1805,6 +1864,7 @@ int ci_hdrc_gadget_init(struct ci13xxx *ci)
rdrv->irq = udc_irq;
rdrv->name = "gadget";
ci->roles[CI_ROLE_GADGET] = rdrv;
+ INIT_WORK(&ci->vbus_work, vbus_work);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.