3 * Denis Peter, MPL AG Switzerland
5 * Part of this source has been derived from the Linux USB
8 * SPDX-License-Identifier: GPL-2.0+
14 #include <stdio_dev.h>
15 #include <asm/byteorder.h>
20 * If overwrite_console returns 1, the stdin, stderr and stdout
21 * are switched to the serial port, else the settings in the
22 * environment are used
24 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
25 extern int overwrite_console(void);
27 int overwrite_console(void)
33 /* Keyboard sampling rate */
34 #define REPEAT_RATE (40 / 4) /* 40msec -> 25cps */
35 #define REPEAT_DELAY 10 /* 10 x REPEAT_RATE = 400msec */
38 #define CAPS_LOCK 0x39
39 #define SCROLL_LOCK 0x47
42 #define LEFT_CNTR (1 << 0)
43 #define LEFT_SHIFT (1 << 1)
44 #define LEFT_ALT (1 << 2)
45 #define LEFT_GUI (1 << 3)
46 #define RIGHT_CNTR (1 << 4)
47 #define RIGHT_SHIFT (1 << 5)
48 #define RIGHT_ALT (1 << 6)
49 #define RIGHT_GUI (1 << 7)
51 /* Size of the keyboard buffer */
52 #define USB_KBD_BUFFER_LEN 0x20
55 #define DEVNAME "usbkbd"
58 static const unsigned char usb_kbd_numkey[] = {
59 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
60 '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
61 '\\', '#', ';', '\'', '`', ',', '.', '/'
63 static const unsigned char usb_kbd_numkey_shifted[] = {
64 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
65 '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
66 '|', '~', ':', '"', '~', '<', '>', '?'
69 static const unsigned char usb_kbd_num_keypad[] = {
70 '/', '*', '-', '+', '\r',
71 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
76 * map arrow keys to ^F/^B ^N/^P, can't really use the proper
77 * ANSI sequence for arrow keys because the queuing code breaks
78 * when a single keypress expands to 3 queue elements
80 static const unsigned char usb_kbd_arrow[] = {
85 * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
86 * order. See usb_kbd_setled() function!
88 #define USB_KBD_NUMLOCK (1 << 0)
89 #define USB_KBD_CAPSLOCK (1 << 1)
90 #define USB_KBD_SCROLLLOCK (1 << 2)
91 #define USB_KBD_CTRL (1 << 3)
93 #define USB_KBD_LEDMASK \
94 (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
97 * USB Keyboard reports are 8 bytes in boot protocol.
98 * Appendix B of HID Device Class Definition 1.11
100 #define USB_KBD_BOOT_REPORT_SIZE 8
102 struct usb_kbd_pdata {
103 unsigned long intpipe;
106 struct int_queue *intq;
108 uint32_t repeat_delay;
110 uint32_t usb_in_pointer;
111 uint32_t usb_out_pointer;
112 uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN];
115 uint8_t old[USB_KBD_BOOT_REPORT_SIZE];
120 extern int __maybe_unused net_busy_flag;
122 /* The period of time between two calls of usb_kbd_testc(). */
123 static unsigned long __maybe_unused kbd_testc_tms;
125 /* Puts character in the queue and sets up the in and out pointer. */
126 static void usb_kbd_put_queue(struct usb_kbd_pdata *data, char c)
128 if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) {
129 /* Check for buffer full. */
130 if (data->usb_out_pointer == 0)
133 data->usb_in_pointer = 0;
135 /* Check for buffer full. */
136 if (data->usb_in_pointer == data->usb_out_pointer - 1)
139 data->usb_in_pointer++;
142 data->usb_kbd_buffer[data->usb_in_pointer] = c;
146 * Set the LEDs. Since this is used in the irq routine, the control job is
147 * issued with a timeout of 0. This means, that the job is queued without
148 * waiting for job completion.
150 static void usb_kbd_setled(struct usb_device *dev)
152 struct usb_interface *iface = &dev->config.if_desc[0];
153 struct usb_kbd_pdata *data = dev->privptr;
154 ALLOC_ALIGN_BUFFER(uint32_t, leds, 1, USB_DMA_MINALIGN);
156 *leds = data->flags & USB_KBD_LEDMASK;
157 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
158 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
159 0x200, iface->desc.bInterfaceNumber, leds, 1, 0);
162 #define CAPITAL_MASK 0x20
163 /* Translate the scancode in ASCII */
164 static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
165 unsigned char modifier, int pressed)
171 data->repeat_delay = 0;
176 data->repeat_delay++;
177 if (data->repeat_delay < REPEAT_DELAY)
180 data->repeat_delay = REPEAT_DELAY;
183 /* Alphanumeric values */
184 if ((scancode > 3) && (scancode <= 0x1d)) {
185 keycode = scancode - 4 + 'a';
187 if (data->flags & USB_KBD_CAPSLOCK)
188 keycode &= ~CAPITAL_MASK;
190 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) {
191 /* Handle CAPSLock + Shift pressed simultaneously */
192 if (keycode & CAPITAL_MASK)
193 keycode &= ~CAPITAL_MASK;
195 keycode |= CAPITAL_MASK;
199 if ((scancode > 0x1d) && (scancode < 0x3a)) {
201 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
202 keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
204 keycode = usb_kbd_numkey[scancode - 0x1e];
208 if ((scancode >= 0x4f) && (scancode <= 0x52))
209 keycode = usb_kbd_arrow[scancode - 0x4f];
212 if ((scancode >= 0x54) && (scancode <= 0x67))
213 keycode = usb_kbd_num_keypad[scancode - 0x54];
215 if (data->flags & USB_KBD_CTRL)
216 keycode = scancode - 0x3;
219 if (scancode == NUM_LOCK) {
220 data->flags ^= USB_KBD_NUMLOCK;
224 if (scancode == CAPS_LOCK) {
225 data->flags ^= USB_KBD_CAPSLOCK;
228 if (scancode == SCROLL_LOCK) {
229 data->flags ^= USB_KBD_SCROLLLOCK;
234 /* Report keycode if any */
236 debug("%c", keycode);
237 usb_kbd_put_queue(data, keycode);
243 static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up)
246 struct usb_kbd_pdata *data = dev->privptr;
259 (memscan(new + 2, old[i], USB_KBD_BOOT_REPORT_SIZE - 2) ==
260 new + USB_KBD_BOOT_REPORT_SIZE)) {
261 res |= usb_kbd_translate(data, old[i], data->new[0], up);
267 /* Interrupt service routine */
268 static int usb_kbd_irq_worker(struct usb_device *dev)
270 struct usb_kbd_pdata *data = dev->privptr;
273 /* No combo key pressed */
274 if (data->new[0] == 0x00)
275 data->flags &= ~USB_KBD_CTRL;
276 /* Left or Right Ctrl pressed */
277 else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR))
278 data->flags |= USB_KBD_CTRL;
280 for (i = 2; i < USB_KBD_BOOT_REPORT_SIZE; i++) {
281 res |= usb_kbd_service_key(dev, i, 0);
282 res |= usb_kbd_service_key(dev, i, 1);
285 /* Key is still pressed */
286 if ((data->new[2] > 3) && (data->old[2] == data->new[2]))
287 res |= usb_kbd_translate(data, data->new[2], data->new[0], 2);
292 memcpy(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE);
297 /* Keyboard interrupt handler */
298 static int usb_kbd_irq(struct usb_device *dev)
300 if ((dev->irq_status != 0) ||
301 (dev->irq_act_len != USB_KBD_BOOT_REPORT_SIZE)) {
302 debug("USB KBD: Error %lX, len %d\n",
303 dev->irq_status, dev->irq_act_len);
307 return usb_kbd_irq_worker(dev);
310 /* Interrupt polling */
311 static inline void usb_kbd_poll_for_event(struct usb_device *dev)
313 #if defined(CONFIG_SYS_USB_EVENT_POLL)
314 struct usb_kbd_pdata *data = dev->privptr;
316 /* Submit a interrupt transfer request */
317 usb_submit_int_msg(dev, data->intpipe, &data->new[0], data->intpktsize,
320 usb_kbd_irq_worker(dev);
321 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
322 struct usb_interface *iface;
323 struct usb_kbd_pdata *data = dev->privptr;
324 iface = &dev->config.if_desc[0];
325 usb_get_report(dev, iface->desc.bInterfaceNumber,
326 1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE);
327 if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE))
328 usb_kbd_irq_worker(dev);
329 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE)
330 struct usb_kbd_pdata *data = dev->privptr;
331 if (poll_int_queue(dev, data->intq)) {
332 usb_kbd_irq_worker(dev);
333 /* We've consumed all queued int packets, create new */
334 destroy_int_queue(dev, data->intq);
335 data->intq = create_int_queue(dev, data->intpipe, 1,
336 USB_KBD_BOOT_REPORT_SIZE, data->new,
342 /* test if a character is in the queue */
343 static int usb_kbd_testc(struct stdio_dev *sdev)
345 struct stdio_dev *dev;
346 struct usb_device *usb_kbd_dev;
347 struct usb_kbd_pdata *data;
349 #ifdef CONFIG_CMD_NET
351 * If net_busy_flag is 1, NET transfer is running,
352 * then we check key-pressed every second (first check may be
353 * less than 1 second) to improve TFTP booting performance.
355 if (net_busy_flag && (get_timer(kbd_testc_tms) < CONFIG_SYS_HZ))
357 kbd_testc_tms = get_timer(0);
359 dev = stdio_get_by_name(DEVNAME);
360 usb_kbd_dev = (struct usb_device *)dev->priv;
361 data = usb_kbd_dev->privptr;
363 usb_kbd_poll_for_event(usb_kbd_dev);
365 return !(data->usb_in_pointer == data->usb_out_pointer);
368 /* gets the character from the queue */
369 static int usb_kbd_getc(struct stdio_dev *sdev)
371 struct stdio_dev *dev;
372 struct usb_device *usb_kbd_dev;
373 struct usb_kbd_pdata *data;
375 dev = stdio_get_by_name(DEVNAME);
376 usb_kbd_dev = (struct usb_device *)dev->priv;
377 data = usb_kbd_dev->privptr;
379 while (data->usb_in_pointer == data->usb_out_pointer)
380 usb_kbd_poll_for_event(usb_kbd_dev);
382 if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1)
383 data->usb_out_pointer = 0;
385 data->usb_out_pointer++;
387 return data->usb_kbd_buffer[data->usb_out_pointer];
390 /* probes the USB device dev for keyboard type. */
391 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
393 struct usb_interface *iface;
394 struct usb_endpoint_descriptor *ep;
395 struct usb_kbd_pdata *data;
397 if (dev->descriptor.bNumConfigurations != 1)
400 iface = &dev->config.if_desc[ifnum];
402 if (iface->desc.bInterfaceClass != 3)
405 if (iface->desc.bInterfaceSubClass != 1)
408 if (iface->desc.bInterfaceProtocol != 1)
411 if (iface->desc.bNumEndpoints != 1)
414 ep = &iface->ep_desc[0];
416 /* Check if endpoint 1 is interrupt endpoint */
417 if (!(ep->bEndpointAddress & 0x80))
420 if ((ep->bmAttributes & 3) != 3)
423 debug("USB KBD: found set protocol...\n");
425 data = malloc(sizeof(struct usb_kbd_pdata));
427 printf("USB KBD: Error allocating private data\n");
431 /* Clear private data */
432 memset(data, 0, sizeof(struct usb_kbd_pdata));
434 /* allocate input buffer aligned and sized to USB DMA alignment */
435 data->new = memalign(USB_DMA_MINALIGN,
436 roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN));
438 /* Insert private data into USB device structure */
441 /* Set IRQ handler */
442 dev->irq_handle = usb_kbd_irq;
444 data->intpipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
445 data->intpktsize = min(usb_maxpacket(dev, data->intpipe),
446 USB_KBD_BOOT_REPORT_SIZE);
447 data->intinterval = ep->bInterval;
449 /* We found a USB Keyboard, install it. */
450 usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
452 debug("USB KBD: found set idle...\n");
453 usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
455 debug("USB KBD: enable interrupt pipe...\n");
456 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
457 data->intq = create_int_queue(dev, data->intpipe, 1,
458 USB_KBD_BOOT_REPORT_SIZE, data->new,
462 if (usb_submit_int_msg(dev, data->intpipe, data->new, data->intpktsize,
463 data->intinterval) < 0) {
465 printf("Failed to get keyboard state from device %04x:%04x\n",
466 dev->descriptor.idVendor, dev->descriptor.idProduct);
467 /* Abort, we don't want to use that non-functional keyboard. */
475 static int probe_usb_keyboard(struct usb_device *dev)
478 struct stdio_dev usb_kbd_dev;
481 /* Try probing the keyboard */
482 if (usb_kbd_probe(dev, 0) != 1)
485 /* Register the keyboard */
486 debug("USB KBD: register.\n");
487 memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
488 strcpy(usb_kbd_dev.name, DEVNAME);
489 usb_kbd_dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
490 usb_kbd_dev.getc = usb_kbd_getc;
491 usb_kbd_dev.tstc = usb_kbd_testc;
492 usb_kbd_dev.priv = (void *)dev;
493 error = stdio_register(&usb_kbd_dev);
497 stdinname = getenv("stdin");
498 #ifdef CONFIG_CONSOLE_MUX
499 error = iomux_doenv(stdin, stdinname);
503 /* Check if this is the standard input device. */
504 if (strcmp(stdinname, DEVNAME))
507 /* Reassign the console */
508 if (overwrite_console())
511 error = console_assign(stdin, DEVNAME);
519 /* Search for keyboard and register it if found. */
520 int drv_usb_kbd_init(void)
524 debug("%s: Probing for keyboard\n", __func__);
527 * TODO: We should add USB_DEVICE() declarations to each USB ethernet
528 * driver and then most of this file can be removed.
534 ret = uclass_get(UCLASS_USB, &uc);
537 uclass_foreach_dev(bus, uc) {
538 for (i = 0; i < USB_MAX_DEVICE; i++) {
539 struct usb_device *dev;
541 dev = usb_get_dev_index(bus, i); /* get device */
542 debug("i=%d, %p\n", i, dev);
544 break; /* no more devices available */
546 error = probe_usb_keyboard(dev);
549 if (error && error != -ENOENT)
554 /* Scan all USB Devices */
555 for (i = 0; i < USB_MAX_DEVICE; i++) {
556 struct usb_device *dev;
558 /* Get USB device. */
559 dev = usb_get_dev_index(i);
563 if (dev->devnum == -1)
566 error = probe_usb_keyboard(dev);
569 if (error && error != -ENOENT)
574 /* No USB Keyboard found */
578 /* Deregister the keyboard. */
579 int usb_kbd_deregister(int force)
581 #ifdef CONFIG_SYS_STDIO_DEREGISTER
582 struct stdio_dev *dev;
583 struct usb_device *usb_kbd_dev;
584 struct usb_kbd_pdata *data;
586 dev = stdio_get_by_name(DEVNAME);
588 usb_kbd_dev = (struct usb_device *)dev->priv;
589 data = usb_kbd_dev->privptr;
590 if (stdio_deregister_dev(dev, force) != 0)
592 #ifdef CONFIG_CONSOLE_MUX
593 if (iomux_doenv(stdin, getenv("stdin")) != 0)
596 #ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
597 destroy_int_queue(usb_kbd_dev, data->intq);