On Sun, Dec 15, 2019 at 6:26 PM Kevin O'Connor <[email protected]> wrote:
>
> On Sat, Dec 14, 2019 at 11:26:17AM -0600, Matt DeVillier wrote:
> > Some USB keyboards report 9 or 10-byte max packet sizes, instead
> > of the 8-byte max specified by the USB HID spec. Handle this by
> > increasing the size of the keyevent struct to 10 bytes, and using the key
> > array size of the usbkeyinfo struct as loop bounds rather than that of the
> > keyevent struct (since the former will always be smaller, and within spec).
> >
> > Test: built/boot on Google Pixel Slate, observe keyboard functional
>
> Thanks. I think it would be good if the relationship between the test
> and the struct sizes was more clear. What about the below (totally
> untested)?
>
> -Kevin
your version produces a working keyboard on the Pixel Slate (when used
in conjunction with my other patch),
but unsure how to test the mouse TBH.
thanks,
Matt
>
> --- a/src/hw/usb-hid.c
> +++ b/src/hw/usb-hid.c
> @@ -49,6 +49,15 @@ set_idle(struct usb_pipe *pipe, int ms)
> #define KEYREPEATWAITMS 500
> #define KEYREPEATMS 33
>
> +// Format of USB keyboard event data
> +struct keyevent {
> + u8 modifiers;
> + u8 reserved;
> + u8 keys[6];
> +};
> +
> +#define MAX_KBD_EVENT 10
> +
> static int
> usb_kbd_setup(struct usbdevice_s *usbdev
> , struct usb_endpoint_descriptor *epdesc)
> @@ -59,8 +68,12 @@ usb_kbd_setup(struct usbdevice_s *usbdev
> // XXX - this enables the first found keyboard (could be random)
> return -1;
>
> - if (epdesc->wMaxPacketSize != 8)
> + if (epdesc->wMaxPacketSize < sizeof(struct keyevent)
> + || epdesc->wMaxPacketSize > MAX_KBD_EVENT) {
> + dprintf(1, "USB keyboard wMaxPacketSize=%d; aborting\n"
> + , epdesc->wMaxPacketSize);
> return -1;
> + }
>
> // Enable "boot" protocol.
> int ret = set_protocol(usbdev->defpipe, 0);
> @@ -79,6 +92,14 @@ usb_kbd_setup(struct usbdevice_s *usbdev
> return 0;
> }
>
> +// Format of USB mouse event data
> +struct mouseevent {
> + u8 buttons;
> + u8 x, y;
> +};
> +
> +#define MAX_MOUSE_EVENT 8
> +
> static int
> usb_mouse_setup(struct usbdevice_s *usbdev
> , struct usb_endpoint_descriptor *epdesc)
> @@ -89,8 +110,12 @@ usb_mouse_setup(struct usbdevice_s *usbdev
> // XXX - this enables the first found mouse (could be random)
> return -1;
>
> - if (epdesc->wMaxPacketSize < 3 || epdesc->wMaxPacketSize > 8)
> + if (epdesc->wMaxPacketSize < sizeof(struct mouseevent)
> + || epdesc->wMaxPacketSize > MAX_MOUSE_EVENT) {
> + dprintf(1, "USB mouse wMaxPacketSize=%d; aborting\n"
> + , epdesc->wMaxPacketSize);
> return -1;
> + }
>
> // Enable "boot" protocol.
> int ret = set_protocol(usbdev->defpipe, 0);
> @@ -163,13 +188,6 @@ static u16 ModifierToScanCode[] VAR16 = {
>
> #define RELEASEBIT 0x80
>
> -// Format of USB keyboard event data
> -struct keyevent {
> - u8 modifiers;
> - u8 reserved;
> - u8 keys[6];
> -};
> -
> // Translate data from KeyToScanCode[] to calls to process_key().
> static void
> prockeys(u16 scancode, u8 key_release, u8 mods)
> @@ -309,11 +327,11 @@ usb_check_key(void)
> return;
>
> for (;;) {
> - struct keyevent data;
> - int ret = usb_poll_intr(pipe, &data);
> + u8 data[MAX_KBD_EVENT];
> + int ret = usb_poll_intr(pipe, data);
> if (ret)
> break;
> - handle_key(&data);
> + handle_key((void*)data);
> }
> }
>
> @@ -349,13 +367,6 @@ usb_kbd_command(int command, u8 *param)
> * Mouse events
> ****************************************************************/
>
> -// Format of USB mouse event data
> -struct mouseevent {
> - u8 buttons;
> - u8 x, y;
> - u8 reserved[5];
> -};
> -
> // Process USB mouse data.
> static void
> handle_mouse(struct mouseevent *data)
> @@ -381,11 +392,11 @@ usb_check_mouse(void)
> return;
>
> for (;;) {
> - struct mouseevent data;
> - int ret = usb_poll_intr(pipe, &data);
> + u8 data[MAX_MOUSE_EVENT];
> + int ret = usb_poll_intr(pipe, data);
> if (ret)
> break;
> - handle_mouse(&data);
> + handle_mouse((void*)data);
> }
> }
>
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