USB keyboard polling failed for some keyboards on PowerPC 5020. This was caused by requesting only 4 bytes of data from keyboards that produce an 8 byte HID report.
Signed-off-by: Adrian Cox adrian@humboldt.co.uk Signed-off-by: Wolfgang Denk wd@denx.de Cc: Marek Vasut marex@denx.de --- Changes in v3: - Fixed checkstyle warnings - Renamed constant to USB_KBD_BOOT_REPORT_SIZE - Use min() for readability
common/usb_kbd.c | 36 +++++++++++++++++++++++++----------- 1 file changed, 25 insertions(+), 11 deletions(-)
diff --git a/common/usb_kbd.c b/common/usb_kbd.c index 1ad67ca..0b77c16 100644 --- a/common/usb_kbd.c +++ b/common/usb_kbd.c @@ -91,6 +91,12 @@ static const unsigned char usb_kbd_arrow[] = { #define USB_KBD_LEDMASK \ (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
+/* + * USB Keyboard reports are 8 bytes in boot protocol. + * Appendix B of HID Device Class Definition 1.11 + */ +#define USB_KBD_BOOT_REPORT_SIZE 8 + struct usb_kbd_pdata { uint32_t repeat_delay;
@@ -99,7 +105,7 @@ struct usb_kbd_pdata { uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN];
uint8_t *new; - uint8_t old[8]; + uint8_t old[USB_KBD_BOOT_REPORT_SIZE];
uint8_t flags; }; @@ -131,7 +137,8 @@ void usb_kbd_generic_poll(void) /* Submit a interrupt transfer request */ maxp = usb_maxpacket(usb_kbd_dev, pipe); usb_submit_int_msg(usb_kbd_dev, pipe, data->new, - maxp > 8 ? 8 : maxp, ep->bInterval); + min(maxp, USB_KBD_BOOT_REPORT_SIZE), + ep->bInterval); }
/* Puts character in the queue and sets up the in and out pointer. */ @@ -266,8 +273,11 @@ static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up) old = data->old; }
- if ((old[i] > 3) && (memscan(new + 2, old[i], 6) == new + 8)) + if ((old[i] > 3) && + (memscan(new + 2, old[i], USB_KBD_BOOT_REPORT_SIZE - 2) == + new + USB_KBD_BOOT_REPORT_SIZE)) { res |= usb_kbd_translate(data, old[i], data->new[0], up); + }
return res; } @@ -285,7 +295,7 @@ static int usb_kbd_irq_worker(struct usb_device *dev) else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR)) data->flags |= USB_KBD_CTRL;
- for (i = 2; i < 8; i++) { + for (i = 2; i < USB_KBD_BOOT_REPORT_SIZE; i++) { res |= usb_kbd_service_key(dev, i, 0); res |= usb_kbd_service_key(dev, i, 1); } @@ -297,7 +307,7 @@ static int usb_kbd_irq_worker(struct usb_device *dev) if (res == 1) usb_kbd_setled(dev);
- memcpy(data->old, data->new, 8); + memcpy(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE);
return 1; } @@ -305,7 +315,8 @@ static int usb_kbd_irq_worker(struct usb_device *dev) /* Keyboard interrupt handler */ static int usb_kbd_irq(struct usb_device *dev) { - if ((dev->irq_status != 0) || (dev->irq_act_len != 8)) { + if ((dev->irq_status != 0) || + (dev->irq_act_len != USB_KBD_BOOT_REPORT_SIZE)) { debug("USB KBD: Error %lX, len %d\n", dev->irq_status, dev->irq_act_len); return 1; @@ -333,7 +344,8 @@ static inline void usb_kbd_poll_for_event(struct usb_device *dev) /* Submit a interrupt transfer request */ maxp = usb_maxpacket(dev, pipe); usb_submit_int_msg(dev, pipe, &data->new[0], - maxp > 8 ? 8 : maxp, ep->bInterval); + min(maxp, USB_KBD_BOOT_REPORT_SIZE), + ep->bInterval);
usb_kbd_irq_worker(dev); #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) @@ -341,8 +353,8 @@ static inline void usb_kbd_poll_for_event(struct usb_device *dev) struct usb_kbd_pdata *data = dev->privptr; iface = &dev->config.if_desc[0]; usb_get_report(dev, iface->desc.bInterfaceNumber, - 1, 0, data->new, sizeof(data->new)); - if (memcmp(data->old, data->new, sizeof(data->new))) + 1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE); + if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE)) usb_kbd_irq_worker(dev); #endif } @@ -441,7 +453,8 @@ static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum) memset(data, 0, sizeof(struct usb_kbd_pdata));
/* allocate input buffer aligned and sized to USB DMA alignment */ - data->new = memalign(USB_DMA_MINALIGN, roundup(8, USB_DMA_MINALIGN)); + data->new = memalign(USB_DMA_MINALIGN, + roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN));
/* Insert private data into USB device structure */ dev->privptr = data; @@ -459,7 +472,8 @@ static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum) usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
debug("USB KBD: enable interrupt pipe...\n"); - if (usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp, + if (usb_submit_int_msg(dev, pipe, data->new, + min(maxp, USB_KBD_BOOT_REPORT_SIZE), ep->bInterval) < 0) { printf("Failed to get keyboard state from device %04x:%04x\n", dev->descriptor.idVendor, dev->descriptor.idProduct);