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usb: kbd: Add probe quirk for Apple and Keychron keyboards

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Those keyboards do not return the current device state. Polling will
timeout unless there are key presses. This is not a problem during
operation but the initial device state query during probing will fail.
Skip this step in usb_kbd_probe_dev() to make these devices useable.
Not all Apple keyboards behave like this. A keyboard with USB
vendor/product ID 05ac:0221 is reported to work with the current code.
Unfortunately some Keychron keyboards "re-use" Apple's vendor ID and
show the same behavior (Keychron C2, 05ac:024f for example).

Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Janne Grunau <j@jannau.net>
This commit is contained in:
Janne Grunau 2024-04-04 08:25:54 +02:00 • committed by Marek Vasut
parent 575c68279c
commit 63f6a449bf
1 changed files with 22 additions and 0 deletions
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22
common/usb_kbd.c
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@ -31,6 +31,10 @@
#define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_FINGERPRINT_2021 0x029a
#define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_2021 0x029f
#define USB_VENDOR_ID_KEYCHRON 0x3434
#define USB_HID_QUIRK_POLL_NO_REPORT_IDLE BIT(0)
/*
* If overwrite_console returns 1, the stdin, stderr and stdout
* are switched to the serial port, else the settings in the
@ -474,6 +478,7 @@ static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
struct usb_interface *iface;
struct usb_endpoint_descriptor *ep;
struct usb_kbd_pdata *data;
unsigned int quirks = 0;
int epNum;
if (dev->descriptor.bNumConfigurations != 1)
@ -506,6 +511,15 @@ static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
debug("USB KBD: found interrupt EP: 0x%x\n", ep->bEndpointAddress);
switch (dev->descriptor.idVendor) {
case USB_VENDOR_ID_APPLE:
case USB_VENDOR_ID_KEYCHRON:
quirks |= USB_HID_QUIRK_POLL_NO_REPORT_IDLE;
break;
default:
break;
}
data = malloc(sizeof(struct usb_kbd_pdata));
if (!data) {
printf("USB KBD: Error allocating private data\n");
@ -546,6 +560,14 @@ static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
usb_set_idle(dev, iface->desc.bInterfaceNumber, 0, 0);
#endif
/*
* Apple and Keychron keyboards do not report the device state. Reports
* are only returned during key presses.
*/
if (quirks & USB_HID_QUIRK_POLL_NO_REPORT_IDLE) {
debug("USB KBD: quirk: skip testing device state\n");
return 1;
}
debug("USB KBD: enable interrupt pipe...\n");
#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
data->intq = create_int_queue(dev, data->intpipe, 1,