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build/patch/kernel/archive/bcm2711-6.5/1003-remote-wakeup.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Igor Pecovnik <igorpecovnik@users.noreply.github.com>
Date: Mon, 29 Aug 2022 08:43:24 +0200
Subject: [ARCHEOLOGY] Add patches needed for Pi-KVM on Rpi4 (#4127)
> X-Git-Archeology: > recovered message: > * Add patches needed for Pi-KVM on Rpi4
> X-Git-Archeology: > recovered message: > * Remove patch that does not belong here
> X-Git-Archeology: > recovered message: > * Update config
> X-Git-Archeology: > recovered message: > * Update edge config
> X-Git-Archeology: - Revision 2fb3aaaf86a7463ef1d26f4d623e1d3289ea4f25: https://github.com/armbian/build/commit/2fb3aaaf86a7463ef1d26f4d623e1d3289ea4f25
> X-Git-Archeology: Date: Mon, 29 Aug 2022 08:43:24 +0200
> X-Git-Archeology: From: Igor Pecovnik <igorpecovnik@users.noreply.github.com>
> X-Git-Archeology: Subject: Add patches needed for Pi-KVM on Rpi4 (#4127)
> X-Git-Archeology:
> X-Git-Archeology: - Revision acf5810cbe38c7578907ecd06e61abb0a446df1e: https://github.com/armbian/build/commit/acf5810cbe38c7578907ecd06e61abb0a446df1e
> X-Git-Archeology: Date: Sat, 11 Mar 2023 19:19:13 +0100
> X-Git-Archeology: From: Igor Pecovnik <igor@armbian.com>
> X-Git-Archeology: Subject: Move Rpi kernels to 6.2, move current to legacy (#4898)
> X-Git-Archeology:
> X-Git-Archeology: - Revision 5f2a1af2193187f0b994d6f163b94f370a01134f: https://github.com/armbian/build/commit/5f2a1af2193187f0b994d6f163b94f370a01134f
> X-Git-Archeology: Date: Fri, 28 Apr 2023 21:32:52 +0200
> X-Git-Archeology: From: Ricardo Pardini <ricardo@pardini.net>
> X-Git-Archeology: Subject: `bcm2711`/`edge`: bump to `6.3` (`rpi4b`, RPi Foundation Kernel)
> X-Git-Archeology:
---
drivers/usb/dwc2/gadget.c | 73 ++++++++++
drivers/usb/gadget/function/f_hid.c | 14 ++
drivers/usb/gadget/function/u_hid.h | 1 +
3 files changed, 88 insertions(+)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 8b15742d9e8a..a7d997a205d5 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -4763,6 +4763,78 @@ static void dwc2_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed sp
spin_unlock_irqrestore(&hsotg->lock, flags);
}
+/**
+ * dwc2_hsotg_wakeup - send wakeup signal to the host
+ * @gadget: The usb gadget state
+ *
+ * If the gadget is in device mode and in the L1 or L2 state,
+ * it sends a wakeup signal to the host.
+ */
+static int dwc2_hsotg_wakeup(struct usb_gadget *gadget)
+{
+ struct dwc2_hsotg *hsotg = to_hsotg(gadget);
+ int ret = -1;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ if (!hsotg->remote_wakeup_allowed) {
+ dev_dbg(hsotg->dev,
+ "wakeup: signalling skipped: is not allowed by host\n");
+ goto skip;
+ }
+ if (hsotg->lx_state != DWC2_L1 && hsotg->lx_state != DWC2_L2) {
+ dev_dbg(hsotg->dev,
+ "wakeup: signalling skipped: gadget not in L1/L2 state: %d\n", hsotg->lx_state);
+ goto skip;
+ }
+ if (!dwc2_is_device_mode(hsotg)) {
+ dev_dbg(hsotg->dev,
+ "wakeup: signalling skipped: gadget not in device mode\n");
+ goto skip;
+ }
+
+ /*if (hsotg->in_ppd) {
+ if (dwc2_exit_partial_power_down(hsotg, 1, true))
+ dev_err(hsotg->dev, "wakeup: exit partial_power_down failed\n");
+ call_gadget(hsotg, resume);
+ }*/
+ if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended) {
+ u32 pcgctl;
+
+ dev_dbg(hsotg->dev, "wakeup: exiting device clock gating\n");
+
+ /* Clear the Gate hclk. */
+ pcgctl = dwc2_readl(hsotg, PCGCTL);
+ pcgctl &= ~PCGCTL_GATEHCLK;
+ dwc2_writel(hsotg, pcgctl, PCGCTL);
+ udelay(5);
+
+ /* Phy Clock bit. */
+ pcgctl = dwc2_readl(hsotg, PCGCTL);
+ pcgctl &= ~PCGCTL_STOPPCLK;
+ dwc2_writel(hsotg, pcgctl, PCGCTL);
+ udelay(5);
+
+ hsotg->bus_suspended = false;
+ }
+
+ dev_dbg(hsotg->dev, "wakeup: sending signal to the host");
+
+ dwc2_set_bit(hsotg, DCTL, DCTL_RMTWKUPSIG);
+ mdelay(10);
+ dwc2_clear_bit(hsotg, DCTL, DCTL_RMTWKUPSIG);
+
+ /* After the signalling, the USB core wakes up to L0 */
+ call_gadget(hsotg, resume);
+ hsotg->lx_state = DWC2_L0;
+
+ ret = 0;
+skip:
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ return ret;
+}
+
static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = {
.get_frame = dwc2_hsotg_gadget_getframe,
.set_selfpowered = dwc2_hsotg_set_selfpowered,
@@ -4772,6 +4844,7 @@ static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = {
.udc_set_speed = dwc2_gadget_set_speed,
.vbus_session = dwc2_hsotg_vbus_session,
.vbus_draw = dwc2_hsotg_vbus_draw,
+ .wakeup = dwc2_hsotg_wakeup,
};
/**
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index ea85e2c701a1..846942e4275a 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -58,6 +58,8 @@ struct f_hidg {
* will be used to receive reports.
*/
bool use_out_ep;
+ /* attempt to wake up the host before write */
+ bool wakeup_on_write;
/* recv report */
spinlock_t read_spinlock;
@@ -434,10 +436,19 @@ static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
size_t count, loff_t *offp)
{
struct f_hidg *hidg = file->private_data;
+ struct usb_composite_dev *cdev = hidg->func.config->cdev;
struct usb_request *req;
unsigned long flags;
ssize_t status = -ENOMEM;
+ /*
+ * remote wakeup is allowed only when the corresponding bit
+ * in config descriptor is set and wakeup_on_write is enabled.
+ * FIXME: cdev->config can be NULLed on disconnect.
+ */
+ if (hidg->wakeup_on_write /*&& cdev->config->bmAttributes & 0x20*/)
+ usb_gadget_wakeup(cdev->gadget);
+
spin_lock_irqsave(&hidg->write_spinlock, flags);
if (!hidg->req) {
@@ -1101,6 +1112,7 @@ CONFIGFS_ATTR(f_hid_opts_, name)
F_HID_OPT(subclass, 8, 255);
F_HID_OPT(protocol, 8, 255);
F_HID_OPT(no_out_endpoint, 8, 1);
+F_HID_OPT(wakeup_on_write, 8, 1);
F_HID_OPT(report_length, 16, 65535);
static ssize_t f_hid_opts_report_desc_show(struct config_item *item, char *page)
@@ -1161,6 +1173,7 @@ static struct configfs_attribute *hid_attrs[] = {
&f_hid_opts_attr_subclass,
&f_hid_opts_attr_protocol,
&f_hid_opts_attr_no_out_endpoint,
+ &f_hid_opts_attr_wakeup_on_write,
&f_hid_opts_attr_report_length,
&f_hid_opts_attr_report_desc,
&f_hid_opts_attr_dev,
@@ -1296,6 +1309,7 @@ static struct usb_function *hidg_alloc(struct usb_function_instance *fi)
}
}
hidg->use_out_ep = !opts->no_out_endpoint;
+ hidg->wakeup_on_write = opts->wakeup_on_write;
++opts->refcnt;
mutex_unlock(&opts->lock);
diff --git a/drivers/usb/gadget/function/u_hid.h b/drivers/usb/gadget/function/u_hid.h
index 84bb70292855..f7fcaf1eaf1d 100644
--- a/drivers/usb/gadget/function/u_hid.h
+++ b/drivers/usb/gadget/function/u_hid.h
@@ -21,6 +21,7 @@ struct f_hid_opts {
unsigned char subclass;
unsigned char protocol;
unsigned char no_out_endpoint;
+ unsigned char wakeup_on_write;
unsigned short report_length;
unsigned short report_desc_length;
unsigned char *report_desc;
--
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