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58acb1dd2c
This adds a bunch of patches for the v6.1 Gemini kernel. For v5.15 this was down to a single upstream patch, but for kernel v6.2 I reworked the USB code for FOTG210, so instead of carrying over the half-baked and incomplete patch from v5.15 I just backported all the v6.2 patches, 31 in total, as it creates full device USB mode for e.g. D-Link DNS-313. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
159 lines
4.3 KiB
Diff
159 lines
4.3 KiB
Diff
From 03e4b585ac947e2d422bedf03179bbfec3aca3cf Mon Sep 17 00:00:00 2001
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From: Linus Walleij <linus.walleij@linaro.org>
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Date: Mon, 14 Nov 2022 12:51:59 +0100
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Subject: [PATCH 09/29] fotg210-udc: Support optional external PHY
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This adds support for an optional external PHY to the FOTG210
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UDC driver.
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Tested with the GPIO VBUS PHY driver on the Gemini SoC.
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Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Link: https://lore.kernel.org/r/20221114115201.302887-2-linus.walleij@linaro.org
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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--- a/drivers/usb/fotg210/fotg210-udc.c
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+++ b/drivers/usb/fotg210/fotg210-udc.c
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@@ -15,6 +15,8 @@
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#include <linux/platform_device.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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+#include <linux/usb/otg.h>
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+#include <linux/usb/phy.h>
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#include "fotg210.h"
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#include "fotg210-udc.h"
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@@ -1022,10 +1024,18 @@ static int fotg210_udc_start(struct usb_
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{
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struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
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u32 value;
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+ int ret;
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/* hook up the driver */
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fotg210->driver = driver;
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+ if (!IS_ERR_OR_NULL(fotg210->phy)) {
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+ ret = otg_set_peripheral(fotg210->phy->otg,
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+ &fotg210->gadget);
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+ if (ret)
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+ dev_err(fotg210->dev, "can't bind to phy\n");
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+ }
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+
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/* enable device global interrupt */
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value = ioread32(fotg210->reg + FOTG210_DMCR);
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value |= DMCR_GLINT_EN;
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@@ -1067,6 +1077,9 @@ static int fotg210_udc_stop(struct usb_g
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struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
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unsigned long flags;
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+ if (!IS_ERR_OR_NULL(fotg210->phy))
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+ return otg_set_peripheral(fotg210->phy->otg, NULL);
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+
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spin_lock_irqsave(&fotg210->lock, flags);
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fotg210_init(fotg210);
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@@ -1082,12 +1095,50 @@ static const struct usb_gadget_ops fotg2
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.udc_stop = fotg210_udc_stop,
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};
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+/**
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+ * fotg210_phy_event - Called by phy upon VBus event
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+ * @nb: notifier block
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+ * @action: phy action, is vbus connect or disconnect
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+ * @data: the usb_gadget structure in fotg210
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+ *
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+ * Called by the USB Phy when a cable connect or disconnect is sensed.
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+ *
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+ * Returns NOTIFY_OK or NOTIFY_DONE
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+ */
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+static int fotg210_phy_event(struct notifier_block *nb, unsigned long action,
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+ void *data)
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+{
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+ struct usb_gadget *gadget = data;
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+
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+ if (!gadget)
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+ return NOTIFY_DONE;
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+
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+ switch (action) {
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+ case USB_EVENT_VBUS:
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+ usb_gadget_vbus_connect(gadget);
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+ return NOTIFY_OK;
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+ case USB_EVENT_NONE:
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+ usb_gadget_vbus_disconnect(gadget);
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+ return NOTIFY_OK;
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+ default:
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+ return NOTIFY_DONE;
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+ }
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+}
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+
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+static struct notifier_block fotg210_phy_notifier = {
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+ .notifier_call = fotg210_phy_event,
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+};
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+
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int fotg210_udc_remove(struct platform_device *pdev)
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{
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struct fotg210_udc *fotg210 = platform_get_drvdata(pdev);
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int i;
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usb_del_gadget_udc(&fotg210->gadget);
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+ if (!IS_ERR_OR_NULL(fotg210->phy)) {
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+ usb_unregister_notifier(fotg210->phy, &fotg210_phy_notifier);
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+ usb_put_phy(fotg210->phy);
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+ }
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iounmap(fotg210->reg);
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free_irq(platform_get_irq(pdev, 0), fotg210);
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@@ -1127,6 +1178,22 @@ int fotg210_udc_probe(struct platform_de
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if (fotg210 == NULL)
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goto err;
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+ fotg210->dev = dev;
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+
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+ fotg210->phy = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0);
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+ if (IS_ERR(fotg210->phy)) {
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+ ret = PTR_ERR(fotg210->phy);
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+ if (ret == -EPROBE_DEFER)
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+ goto err;
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+ dev_info(dev, "no PHY found\n");
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+ fotg210->phy = NULL;
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+ } else {
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+ ret = usb_phy_init(fotg210->phy);
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+ if (ret)
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+ goto err;
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+ dev_info(dev, "found and initialized PHY\n");
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+ }
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+
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for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
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_ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL);
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if (_ep[i] == NULL)
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@@ -1200,6 +1267,9 @@ int fotg210_udc_probe(struct platform_de
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goto err_req;
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}
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+ if (!IS_ERR_OR_NULL(fotg210->phy))
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+ usb_register_notifier(fotg210->phy, &fotg210_phy_notifier);
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+
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ret = usb_add_gadget_udc(dev, &fotg210->gadget);
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if (ret)
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goto err_add_udc;
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@@ -1209,6 +1279,8 @@ int fotg210_udc_probe(struct platform_de
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return 0;
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err_add_udc:
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+ if (!IS_ERR_OR_NULL(fotg210->phy))
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+ usb_unregister_notifier(fotg210->phy, &fotg210_phy_notifier);
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free_irq(ires->start, fotg210);
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err_req:
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--- a/drivers/usb/fotg210/fotg210-udc.h
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+++ b/drivers/usb/fotg210/fotg210-udc.h
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@@ -234,6 +234,8 @@ struct fotg210_udc {
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unsigned long irq_trigger;
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+ struct device *dev;
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+ struct usb_phy *phy;
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struct usb_gadget gadget;
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struct usb_gadget_driver *driver;
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