1 // SPDX-License-Identifier: GPL-2.0+
4 * Denis Peter, MPL AG Switzerland
6 * Part of this source has been derived from the Linux USB
16 #include <stdio_dev.h>
19 #include <asm/byteorder.h>
21 #include <asm/state.h>
27 * USB vendor and product IDs used for quirks.
29 #define USB_VENDOR_ID_APPLE 0x05ac
30 #define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_2021 0x029c
31 #define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_FINGERPRINT_2021 0x029a
32 #define USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_2021 0x029f
34 #define USB_VENDOR_ID_KEYCHRON 0x3434
36 #define USB_HID_QUIRK_POLL_NO_REPORT_IDLE BIT(0)
39 * If overwrite_console returns 1, the stdin, stderr and stdout
40 * are switched to the serial port, else the settings in the
41 * environment are used
43 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
44 extern int overwrite_console(void);
46 int overwrite_console(void)
52 /* Keyboard sampling rate */
53 #define REPEAT_RATE 40 /* 40msec -> 25cps */
54 #define REPEAT_DELAY 10 /* 10 x REPEAT_RATE = 400msec */
57 #define CAPS_LOCK 0x39
58 #define SCROLL_LOCK 0x47
61 #define LEFT_CNTR (1 << 0)
62 #define LEFT_SHIFT (1 << 1)
63 #define LEFT_ALT (1 << 2)
64 #define LEFT_GUI (1 << 3)
65 #define RIGHT_CNTR (1 << 4)
66 #define RIGHT_SHIFT (1 << 5)
67 #define RIGHT_ALT (1 << 6)
68 #define RIGHT_GUI (1 << 7)
70 /* Size of the keyboard buffer */
71 #define USB_KBD_BUFFER_LEN 0x20
74 #define DEVNAME "usbkbd"
77 static const unsigned char usb_kbd_numkey[] = {
78 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
79 '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
80 '\\', '#', ';', '\'', '`', ',', '.', '/'
82 static const unsigned char usb_kbd_numkey_shifted[] = {
83 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
84 '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
85 '|', '~', ':', '"', '~', '<', '>', '?'
88 static const unsigned char usb_kbd_num_keypad[] = {
89 '/', '*', '-', '+', '\r',
90 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
94 static const u8 usb_special_keys[] = {
95 #ifdef CONFIG_USB_KEYBOARD_FN_KEYS
96 '2', 'H', '5', '3', 'F', '6', 'C', 'D', 'B', 'A'
103 * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
104 * order. See usb_kbd_setled() function!
106 #define USB_KBD_NUMLOCK (1 << 0)
107 #define USB_KBD_CAPSLOCK (1 << 1)
108 #define USB_KBD_SCROLLLOCK (1 << 2)
109 #define USB_KBD_CTRL (1 << 3)
111 #define USB_KBD_LEDMASK \
112 (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
114 struct usb_kbd_pdata {
115 unsigned long intpipe;
118 unsigned long last_report;
119 struct int_queue *intq;
123 uint32_t repeat_delay;
125 uint32_t usb_in_pointer;
126 uint32_t usb_out_pointer;
127 uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN];
130 uint8_t old[USB_KBD_BOOT_REPORT_SIZE];
135 extern int __maybe_unused net_busy_flag;
137 /* The period of time between two calls of usb_kbd_testc(). */
138 static unsigned long kbd_testc_tms;
140 /* Puts character in the queue and sets up the in and out pointer. */
141 static void usb_kbd_put_queue(struct usb_kbd_pdata *data, u8 c)
143 if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) {
144 /* Check for buffer full. */
145 if (data->usb_out_pointer == 0)
148 data->usb_in_pointer = 0;
150 /* Check for buffer full. */
151 if (data->usb_in_pointer == data->usb_out_pointer - 1)
154 data->usb_in_pointer++;
157 data->usb_kbd_buffer[data->usb_in_pointer] = c;
161 * Set the LEDs. Since this is used in the irq routine, the control job is
162 * issued with a timeout of 0. This means, that the job is queued without
163 * waiting for job completion.
165 static void usb_kbd_setled(struct usb_device *dev)
167 struct usb_kbd_pdata *data = dev->privptr;
168 struct usb_interface *iface = &dev->config.if_desc[data->ifnum];
169 ALLOC_ALIGN_BUFFER(uint32_t, leds, 1, USB_DMA_MINALIGN);
171 *leds = data->flags & USB_KBD_LEDMASK;
172 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
173 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
174 0x200, iface->desc.bInterfaceNumber, leds, 1, 0);
177 #define CAPITAL_MASK 0x20
178 /* Translate the scancode in ASCII */
179 static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
180 unsigned char modifier, int pressed)
186 data->repeat_delay = 0;
191 data->repeat_delay++;
192 if (data->repeat_delay < REPEAT_DELAY)
195 data->repeat_delay = REPEAT_DELAY;
198 /* Alphanumeric values */
199 if ((scancode > 3) && (scancode <= 0x1d)) {
200 keycode = scancode - 4 + 'a';
202 if (data->flags & USB_KBD_CAPSLOCK)
203 keycode &= ~CAPITAL_MASK;
205 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) {
206 /* Handle CAPSLock + Shift pressed simultaneously */
207 if (keycode & CAPITAL_MASK)
208 keycode &= ~CAPITAL_MASK;
210 keycode |= CAPITAL_MASK;
214 if ((scancode > 0x1d) && (scancode < 0x39)) {
216 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
217 keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
219 keycode = usb_kbd_numkey[scancode - 0x1e];
223 if ((scancode >= 0x54) && (scancode <= 0x67))
224 keycode = usb_kbd_num_keypad[scancode - 0x54];
226 if (data->flags & USB_KBD_CTRL)
227 keycode = scancode - 0x3;
230 if (scancode == NUM_LOCK) {
231 data->flags ^= USB_KBD_NUMLOCK;
235 if (scancode == CAPS_LOCK) {
236 data->flags ^= USB_KBD_CAPSLOCK;
239 if (scancode == SCROLL_LOCK) {
240 data->flags ^= USB_KBD_SCROLLLOCK;
245 /* Report keycode if any */
247 debug("%c", keycode);
248 usb_kbd_put_queue(data, keycode);
252 #ifdef CONFIG_USB_KEYBOARD_FN_KEYS
253 if (scancode < 0x3a || scancode > 0x52 ||
254 scancode == 0x46 || scancode == 0x47)
257 usb_kbd_put_queue(data, 0x1b);
258 if (scancode < 0x3e) {
260 usb_kbd_put_queue(data, 0x4f);
261 usb_kbd_put_queue(data, scancode - 0x3a + 'P');
264 usb_kbd_put_queue(data, '[');
265 if (scancode < 0x42) {
267 usb_kbd_put_queue(data, '1');
268 if (scancode == 0x3e)
270 keycode = scancode - 0x3f + '7';
271 } else if (scancode < 0x49) {
273 usb_kbd_put_queue(data, '2');
276 keycode = scancode - 0x42 + '0';
279 * INSERT, HOME, PAGE UP, DELETE, END, PAGE DOWN,
280 * RIGHT, LEFT, DOWN, UP
282 keycode = usb_special_keys[scancode - 0x49];
284 usb_kbd_put_queue(data, keycode);
285 if (scancode < 0x4f && scancode != 0x4a && scancode != 0x4d)
286 usb_kbd_put_queue(data, '~');
289 /* Left, Right, Up, Down */
290 if (scancode > 0x4e && scancode < 0x53) {
291 usb_kbd_put_queue(data, 0x1b);
292 usb_kbd_put_queue(data, '[');
293 usb_kbd_put_queue(data, usb_special_keys[scancode - 0x4f]);
297 #endif /* CONFIG_USB_KEYBOARD_FN_KEYS */
300 static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up)
303 struct usb_kbd_pdata *data = dev->privptr;
316 (memscan(new + 2, old[i], USB_KBD_BOOT_REPORT_SIZE - 2) ==
317 new + USB_KBD_BOOT_REPORT_SIZE)) {
318 res |= usb_kbd_translate(data, old[i], data->new[0], up);
324 /* Interrupt service routine */
325 static int usb_kbd_irq_worker(struct usb_device *dev)
327 struct usb_kbd_pdata *data = dev->privptr;
330 /* No combo key pressed */
331 if (data->new[0] == 0x00)
332 data->flags &= ~USB_KBD_CTRL;
333 /* Left or Right Ctrl pressed */
334 else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR))
335 data->flags |= USB_KBD_CTRL;
337 for (i = 2; i < USB_KBD_BOOT_REPORT_SIZE; i++) {
338 res |= usb_kbd_service_key(dev, i, 0);
339 res |= usb_kbd_service_key(dev, i, 1);
342 /* Key is still pressed */
343 if ((data->new[2] > 3) && (data->old[2] == data->new[2]))
344 res |= usb_kbd_translate(data, data->new[2], data->new[0], 2);
349 memcpy(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE);
354 /* Keyboard interrupt handler */
355 static int usb_kbd_irq(struct usb_device *dev)
357 if ((dev->irq_status != 0) ||
358 (dev->irq_act_len != USB_KBD_BOOT_REPORT_SIZE)) {
359 debug("USB KBD: Error %lX, len %d\n",
360 dev->irq_status, dev->irq_act_len);
364 return usb_kbd_irq_worker(dev);
367 /* Interrupt polling */
368 static inline void usb_kbd_poll_for_event(struct usb_device *dev)
370 #if defined(CONFIG_SYS_USB_EVENT_POLL)
371 struct usb_kbd_pdata *data = dev->privptr;
373 /* Submit an interrupt transfer request */
374 if (usb_int_msg(dev, data->intpipe, &data->new[0],
375 data->intpktsize, data->intinterval, true) >= 0)
376 usb_kbd_irq_worker(dev);
377 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) || \
378 defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
379 #if defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
380 struct usb_interface *iface;
381 struct usb_kbd_pdata *data = dev->privptr;
382 iface = &dev->config.if_desc[data->ifnum];
383 usb_get_report(dev, iface->desc.bInterfaceNumber,
384 1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE);
385 if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE)) {
386 usb_kbd_irq_worker(dev);
388 struct usb_kbd_pdata *data = dev->privptr;
389 if (poll_int_queue(dev, data->intq)) {
390 usb_kbd_irq_worker(dev);
391 /* We've consumed all queued int packets, create new */
392 destroy_int_queue(dev, data->intq);
393 data->intq = create_int_queue(dev, data->intpipe, 1,
394 USB_KBD_BOOT_REPORT_SIZE, data->new,
397 data->last_report = get_timer(0);
398 /* Repeat last usb hid report every REPEAT_RATE ms for keyrepeat */
399 } else if (data->last_report != -1 &&
400 get_timer(data->last_report) > REPEAT_RATE) {
401 usb_kbd_irq_worker(dev);
402 data->last_report = get_timer(0);
407 /* test if a character is in the queue */
408 static int usb_kbd_testc(struct stdio_dev *sdev)
410 struct stdio_dev *dev;
411 struct usb_device *usb_kbd_dev;
412 struct usb_kbd_pdata *data;
415 * Polling the keyboard for an event can take dozens of milliseconds.
416 * Add a delay between polls to avoid blocking activity which polls
417 * rapidly, like the UEFI console timer.
419 unsigned long poll_delay = CONFIG_SYS_HZ / 50;
421 #ifdef CONFIG_CMD_NET
423 * If net_busy_flag is 1, NET transfer is running,
424 * then we check key-pressed every second (first check may be
425 * less than 1 second) to improve TFTP booting performance.
428 poll_delay = CONFIG_SYS_HZ;
431 #ifdef CONFIG_SANDBOX
433 * Skip delaying polls if a test requests it.
435 if (state_get_skip_delays())
439 dev = stdio_get_by_name(sdev->name);
440 usb_kbd_dev = (struct usb_device *)dev->priv;
441 data = usb_kbd_dev->privptr;
443 if (get_timer(kbd_testc_tms) >= poll_delay) {
444 usb_kbd_poll_for_event(usb_kbd_dev);
445 kbd_testc_tms = get_timer(0);
448 return !(data->usb_in_pointer == data->usb_out_pointer);
451 /* gets the character from the queue */
452 static int usb_kbd_getc(struct stdio_dev *sdev)
454 struct stdio_dev *dev;
455 struct usb_device *usb_kbd_dev;
456 struct usb_kbd_pdata *data;
458 dev = stdio_get_by_name(sdev->name);
459 usb_kbd_dev = (struct usb_device *)dev->priv;
460 data = usb_kbd_dev->privptr;
462 while (data->usb_in_pointer == data->usb_out_pointer) {
464 usb_kbd_poll_for_event(usb_kbd_dev);
467 if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1)
468 data->usb_out_pointer = 0;
470 data->usb_out_pointer++;
472 return data->usb_kbd_buffer[data->usb_out_pointer];
475 /* probes the USB device dev for keyboard type. */
476 static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
478 struct usb_interface *iface;
479 struct usb_endpoint_descriptor *ep;
480 struct usb_kbd_pdata *data;
481 unsigned int quirks = 0;
484 if (dev->descriptor.bNumConfigurations != 1)
487 iface = &dev->config.if_desc[ifnum];
489 if (iface->desc.bInterfaceClass != USB_CLASS_HID)
492 if (iface->desc.bInterfaceSubClass != USB_SUB_HID_BOOT)
495 if (iface->desc.bInterfaceProtocol != USB_PROT_HID_KEYBOARD)
498 for (epNum = 0; epNum < iface->desc.bNumEndpoints; epNum++) {
499 ep = &iface->ep_desc[epNum];
501 /* Check if endpoint is interrupt IN endpoint */
502 if ((ep->bmAttributes & 3) != 3)
505 if (ep->bEndpointAddress & 0x80)
509 if (epNum == iface->desc.bNumEndpoints)
512 debug("USB KBD: found interrupt EP: 0x%x\n", ep->bEndpointAddress);
514 switch (dev->descriptor.idVendor) {
515 case USB_VENDOR_ID_APPLE:
516 case USB_VENDOR_ID_KEYCHRON:
517 quirks |= USB_HID_QUIRK_POLL_NO_REPORT_IDLE;
523 data = malloc(sizeof(struct usb_kbd_pdata));
525 printf("USB KBD: Error allocating private data\n");
529 /* Clear private data */
530 memset(data, 0, sizeof(struct usb_kbd_pdata));
532 /* allocate input buffer aligned and sized to USB DMA alignment */
533 data->new = memalign(USB_DMA_MINALIGN,
534 roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN));
538 /* Insert private data into USB device structure */
541 /* Set IRQ handler */
542 dev->irq_handle = usb_kbd_irq;
544 data->intpipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
545 data->intpktsize = min(usb_maxpacket(dev, data->intpipe),
546 USB_KBD_BOOT_REPORT_SIZE);
547 data->intinterval = ep->bInterval;
548 data->last_report = -1;
550 /* We found a USB Keyboard, install it. */
551 debug("USB KBD: set boot protocol\n");
552 usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
554 #if !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) && \
555 !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
556 debug("USB KBD: set idle interval...\n");
557 usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE / 4, 0);
559 debug("USB KBD: set idle interval=0...\n");
560 usb_set_idle(dev, iface->desc.bInterfaceNumber, 0, 0);
564 * Apple and Keychron keyboards do not report the device state. Reports
565 * are only returned during key presses.
567 if (quirks & USB_HID_QUIRK_POLL_NO_REPORT_IDLE) {
568 debug("USB KBD: quirk: skip testing device state\n");
571 debug("USB KBD: enable interrupt pipe...\n");
572 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
573 data->intq = create_int_queue(dev, data->intpipe, 1,
574 USB_KBD_BOOT_REPORT_SIZE, data->new,
577 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
578 if (usb_get_report(dev, iface->desc.bInterfaceNumber,
579 1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE) < 0) {
581 if (usb_int_msg(dev, data->intpipe, data->new, data->intpktsize,
582 data->intinterval, false) < 0) {
584 printf("Failed to get keyboard state from device %04x:%04x\n",
585 dev->descriptor.idVendor, dev->descriptor.idProduct);
586 /* Abort, we don't want to use that non-functional keyboard. */
594 static int probe_usb_keyboard(struct usb_device *dev)
597 struct stdio_dev usb_kbd_dev;
599 unsigned int max_ifnum = min((unsigned int)USB_MAX_ACTIVE_INTERFACES,
600 (unsigned int)dev->config.no_of_if);
603 /* Try probing the keyboard */
604 for (ifnum = 0; ifnum < max_ifnum; ifnum++) {
605 if (usb_kbd_probe_dev(dev, ifnum) == 1)
608 if (ifnum >= max_ifnum)
611 /* Register the keyboard */
612 debug("USB KBD: register.\n");
613 memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
614 strcpy(usb_kbd_dev.name, DEVNAME);
615 usb_kbd_dev.flags = DEV_FLAGS_INPUT;
616 usb_kbd_dev.getc = usb_kbd_getc;
617 usb_kbd_dev.tstc = usb_kbd_testc;
618 usb_kbd_dev.priv = (void *)dev;
619 error = stdio_register(&usb_kbd_dev);
623 stdinname = env_get("stdin");
624 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
625 if (strstr(stdinname, DEVNAME) != NULL) {
626 error = iomux_doenv(stdin, stdinname);
631 /* Check if this is the standard input device. */
632 if (!strcmp(stdinname, DEVNAME)) {
633 /* Reassign the console */
634 if (overwrite_console())
637 error = console_assign(stdin, DEVNAME);
646 #if !CONFIG_IS_ENABLED(DM_USB)
647 /* Search for keyboard and register it if found. */
648 int drv_usb_kbd_init(void)
652 debug("%s: Probing for keyboard\n", __func__);
653 /* Scan all USB Devices */
654 for (i = 0; i < USB_MAX_DEVICE; i++) {
655 struct usb_device *dev;
657 /* Get USB device. */
658 dev = usb_get_dev_index(i);
662 if (dev->devnum == -1)
665 error = probe_usb_keyboard(dev);
668 if (error && error != -ENOENT)
672 /* No USB Keyboard found */
676 /* Deregister the keyboard. */
677 int usb_kbd_deregister(int force)
679 #if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
680 struct stdio_dev *dev;
681 struct usb_device *usb_kbd_dev;
682 struct usb_kbd_pdata *data;
684 dev = stdio_get_by_name(DEVNAME);
686 usb_kbd_dev = (struct usb_device *)dev->priv;
687 data = usb_kbd_dev->privptr;
688 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
689 if (iomux_replace_device(stdin, DEVNAME, force ? "nulldev" : ""))
692 if (stdio_deregister_dev(dev, force) != 0)
694 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
695 destroy_int_queue(usb_kbd_dev, data->intq);
709 #if CONFIG_IS_ENABLED(DM_USB)
711 static int usb_kbd_probe(struct udevice *dev)
713 struct usb_device *udev = dev_get_parent_priv(dev);
715 return probe_usb_keyboard(udev);
718 static int usb_kbd_remove(struct udevice *dev)
720 struct usb_device *udev = dev_get_parent_priv(dev);
721 struct usb_kbd_pdata *data;
722 struct stdio_dev *sdev;
725 sdev = stdio_get_by_name(DEVNAME);
730 data = udev->privptr;
731 #if CONFIG_IS_ENABLED(CONSOLE_MUX)
732 if (iomux_replace_device(stdin, DEVNAME, "nulldev")) {
737 if (stdio_deregister_dev(sdev, true)) {
741 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
742 destroy_int_queue(udev, data->intq);
749 printf("%s: warning, ret=%d", __func__, ret);
753 static const struct udevice_id usb_kbd_ids[] = {
754 { .compatible = "usb-keyboard" },
758 U_BOOT_DRIVER(usb_kbd) = {
760 .id = UCLASS_KEYBOARD,
761 .of_match = usb_kbd_ids,
762 .probe = usb_kbd_probe,
763 .remove = usb_kbd_remove,
766 static const struct usb_device_id kbd_id_table[] = {
768 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
769 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
770 USB_DEVICE_ID_MATCH_INT_PROTOCOL,
771 .bInterfaceClass = USB_CLASS_HID,
772 .bInterfaceSubClass = USB_SUB_HID_BOOT,
773 .bInterfaceProtocol = USB_PROT_HID_KEYBOARD,
776 USB_DEVICE(USB_VENDOR_ID_APPLE,
777 USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_2021),
780 USB_DEVICE(USB_VENDOR_ID_APPLE,
781 USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_FINGERPRINT_2021),
784 USB_DEVICE(USB_VENDOR_ID_APPLE,
785 USB_DEVICE_ID_APPLE_MAGIC_KEYBOARD_NUMPAD_2021),
787 { } /* Terminating entry */
790 U_BOOT_USB_DEVICE(usb_kbd, kbd_id_table);