3 * Denis Peter, MPL AG Switzerland
5 * Part of this source has been derived from the Linux USB
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <stdio_dev.h>
30 #include <asm/byteorder.h>
35 * If overwrite_console returns 1, the stdin, stderr and stdout
36 * are switched to the serial port, else the settings in the
37 * environment are used
39 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
40 extern int overwrite_console(void);
42 int overwrite_console(void)
48 /* Keyboard sampling rate */
49 #define REPEAT_RATE (40 / 4) /* 40msec -> 25cps */
50 #define REPEAT_DELAY 10 /* 10 x REPEAT_RATE = 400msec */
53 #define CAPS_LOCK 0x39
54 #define SCROLL_LOCK 0x47
57 #define LEFT_CNTR (1 << 0)
58 #define LEFT_SHIFT (1 << 1)
59 #define LEFT_ALT (1 << 2)
60 #define LEFT_GUI (1 << 3)
61 #define RIGHT_CNTR (1 << 4)
62 #define RIGHT_SHIFT (1 << 5)
63 #define RIGHT_ALT (1 << 6)
64 #define RIGHT_GUI (1 << 7)
66 /* Size of the keyboard buffer */
67 #define USB_KBD_BUFFER_LEN 0x20
70 #define DEVNAME "usbkbd"
73 static const unsigned char usb_kbd_numkey[] = {
74 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
75 '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
76 '\\', '#', ';', '\'', '`', ',', '.', '/'
78 static const unsigned char usb_kbd_numkey_shifted[] = {
79 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
80 '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
81 '|', '~', ':', '"', '~', '<', '>', '?'
84 static const unsigned char usb_kbd_num_keypad[] = {
85 '/', '*', '-', '+', '\r',
86 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
91 * map arrow keys to ^F/^B ^N/^P, can't really use the proper
92 * ANSI sequence for arrow keys because the queuing code breaks
93 * when a single keypress expands to 3 queue elements
95 static const unsigned char usb_kbd_arrow[] = {
100 * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
101 * order. See usb_kbd_setled() function!
103 #define USB_KBD_NUMLOCK (1 << 0)
104 #define USB_KBD_CAPSLOCK (1 << 1)
105 #define USB_KBD_SCROLLLOCK (1 << 2)
106 #define USB_KBD_CTRL (1 << 3)
108 #define USB_KBD_LEDMASK \
109 (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
111 struct usb_kbd_pdata {
112 uint32_t repeat_delay;
114 uint32_t usb_in_pointer;
115 uint32_t usb_out_pointer;
116 uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN];
124 /* Generic keyboard event polling. */
125 void usb_kbd_generic_poll(void)
127 struct stdio_dev *dev;
128 struct usb_device *usb_kbd_dev;
129 struct usb_kbd_pdata *data;
130 struct usb_interface *iface;
131 struct usb_endpoint_descriptor *ep;
135 /* Get the pointer to USB Keyboard device pointer */
136 dev = stdio_get_by_name(DEVNAME);
137 usb_kbd_dev = (struct usb_device *)dev->priv;
138 data = usb_kbd_dev->privptr;
139 iface = &usb_kbd_dev->config.if_desc[0];
140 ep = &iface->ep_desc[0];
141 pipe = usb_rcvintpipe(usb_kbd_dev, ep->bEndpointAddress);
143 /* Submit a interrupt transfer request */
144 maxp = usb_maxpacket(usb_kbd_dev, pipe);
145 usb_submit_int_msg(usb_kbd_dev, pipe, data->new,
146 maxp > 8 ? 8 : maxp, ep->bInterval);
149 /* Puts character in the queue and sets up the in and out pointer. */
150 static void usb_kbd_put_queue(struct usb_kbd_pdata *data, char c)
152 if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) {
153 /* Check for buffer full. */
154 if (data->usb_out_pointer == 0)
157 data->usb_in_pointer = 0;
159 /* Check for buffer full. */
160 if (data->usb_in_pointer == data->usb_out_pointer - 1)
163 data->usb_in_pointer++;
166 data->usb_kbd_buffer[data->usb_in_pointer] = c;
170 * Set the LEDs. Since this is used in the irq routine, the control job is
171 * issued with a timeout of 0. This means, that the job is queued without
172 * waiting for job completion.
174 static void usb_kbd_setled(struct usb_device *dev)
176 struct usb_interface *iface = &dev->config.if_desc[0];
177 struct usb_kbd_pdata *data = dev->privptr;
178 uint32_t leds = data->flags & USB_KBD_LEDMASK;
180 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
181 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
182 0x200, iface->desc.bInterfaceNumber, (void *)&leds, 1, 0);
185 #define CAPITAL_MASK 0x20
186 /* Translate the scancode in ASCII */
187 static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
188 unsigned char modifier, int pressed)
194 data->repeat_delay = 0;
199 data->repeat_delay++;
200 if (data->repeat_delay < REPEAT_DELAY)
203 data->repeat_delay = REPEAT_DELAY;
206 /* Alphanumeric values */
207 if ((scancode > 3) && (scancode <= 0x1d)) {
208 keycode = scancode - 4 + 'a';
210 if (data->flags & USB_KBD_CAPSLOCK)
211 keycode &= ~CAPITAL_MASK;
213 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) {
214 /* Handle CAPSLock + Shift pressed simultaneously */
215 if (keycode & CAPITAL_MASK)
216 keycode &= ~CAPITAL_MASK;
218 keycode |= CAPITAL_MASK;
222 if ((scancode > 0x1d) && (scancode < 0x3a)) {
224 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
225 keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
227 keycode = usb_kbd_numkey[scancode - 0x1e];
231 if ((scancode >= 0x4f) && (scancode <= 0x52))
232 keycode = usb_kbd_arrow[scancode - 0x4f];
235 if ((scancode >= 0x54) && (scancode <= 0x67))
236 keycode = usb_kbd_num_keypad[scancode - 0x54];
238 if (data->flags & USB_KBD_CTRL)
239 keycode = scancode - 0x3;
242 if (scancode == NUM_LOCK) {
243 data->flags ^= USB_KBD_NUMLOCK;
247 if (scancode == CAPS_LOCK) {
248 data->flags ^= USB_KBD_CAPSLOCK;
251 if (scancode == SCROLL_LOCK) {
252 data->flags ^= USB_KBD_SCROLLLOCK;
257 /* Report keycode if any */
259 debug("%c", keycode);
260 usb_kbd_put_queue(data, keycode);
266 static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up)
269 struct usb_kbd_pdata *data = dev->privptr;
281 if ((old[i] > 3) && (memscan(new + 2, old[i], 6) == new + 8))
282 res |= usb_kbd_translate(data, old[i], data->new[0], up);
287 /* Interrupt service routine */
288 static int usb_kbd_irq_worker(struct usb_device *dev)
290 struct usb_kbd_pdata *data = dev->privptr;
293 /* No combo key pressed */
294 if (data->new[0] == 0x00)
295 data->flags &= ~USB_KBD_CTRL;
296 /* Left or Right Ctrl pressed */
297 else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR))
298 data->flags |= USB_KBD_CTRL;
300 for (i = 2; i < 8; i++) {
301 res |= usb_kbd_service_key(dev, i, 0);
302 res |= usb_kbd_service_key(dev, i, 1);
305 /* Key is still pressed */
306 if ((data->new[2] > 3) && (data->old[2] == data->new[2]))
307 res |= usb_kbd_translate(data, data->new[2], data->new[0], 2);
312 memcpy(data->old, data->new, 8);
317 /* Keyboard interrupt handler */
318 static int usb_kbd_irq(struct usb_device *dev)
320 if ((dev->irq_status != 0) || (dev->irq_act_len != 8)) {
321 debug("USB KBD: Error %lX, len %d\n",
322 dev->irq_status, dev->irq_act_len);
326 return usb_kbd_irq_worker(dev);
329 /* Interrupt polling */
330 static inline void usb_kbd_poll_for_event(struct usb_device *dev)
332 #if defined(CONFIG_SYS_USB_EVENT_POLL)
333 struct usb_interface *iface;
334 struct usb_endpoint_descriptor *ep;
335 struct usb_kbd_pdata *data;
339 /* Get the pointer to USB Keyboard device pointer */
341 iface = &dev->config.if_desc[0];
342 ep = &iface->ep_desc[0];
343 pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
345 /* Submit a interrupt transfer request */
346 maxp = usb_maxpacket(dev, pipe);
347 usb_submit_int_msg(dev, pipe, &data->new[0],
348 maxp > 8 ? 8 : maxp, ep->bInterval);
350 usb_kbd_irq_worker(dev);
351 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
352 struct usb_interface *iface;
353 struct usb_kbd_pdata *data = dev->privptr;
354 iface = &dev->config.if_desc[0];
355 usb_get_report(dev, iface->desc.bInterfaceNumber,
356 1, 0, data->new, sizeof(data->new));
357 if (memcmp(data->old, data->new, sizeof(data->new)))
358 usb_kbd_irq_worker(dev);
362 /* test if a character is in the queue */
363 static int usb_kbd_testc(void)
365 struct stdio_dev *dev;
366 struct usb_device *usb_kbd_dev;
367 struct usb_kbd_pdata *data;
369 dev = stdio_get_by_name(DEVNAME);
370 usb_kbd_dev = (struct usb_device *)dev->priv;
371 data = usb_kbd_dev->privptr;
373 usb_kbd_poll_for_event(usb_kbd_dev);
375 return !(data->usb_in_pointer == data->usb_out_pointer);
378 /* gets the character from the queue */
379 static int usb_kbd_getc(void)
381 struct stdio_dev *dev;
382 struct usb_device *usb_kbd_dev;
383 struct usb_kbd_pdata *data;
385 dev = stdio_get_by_name(DEVNAME);
386 usb_kbd_dev = (struct usb_device *)dev->priv;
387 data = usb_kbd_dev->privptr;
389 while (data->usb_in_pointer == data->usb_out_pointer)
390 usb_kbd_poll_for_event(usb_kbd_dev);
392 if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1)
393 data->usb_out_pointer = 0;
395 data->usb_out_pointer++;
397 return data->usb_kbd_buffer[data->usb_out_pointer];
400 /* probes the USB device dev for keyboard type. */
401 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
403 struct usb_interface *iface;
404 struct usb_endpoint_descriptor *ep;
405 struct usb_kbd_pdata *data;
408 if (dev->descriptor.bNumConfigurations != 1)
411 iface = &dev->config.if_desc[ifnum];
413 if (iface->desc.bInterfaceClass != 3)
416 if (iface->desc.bInterfaceSubClass != 1)
419 if (iface->desc.bInterfaceProtocol != 1)
422 if (iface->desc.bNumEndpoints != 1)
425 ep = &iface->ep_desc[0];
427 /* Check if endpoint 1 is interrupt endpoint */
428 if (!(ep->bEndpointAddress & 0x80))
431 if ((ep->bmAttributes & 3) != 3)
434 debug("USB KBD: found set protocol...\n");
436 data = malloc(sizeof(struct usb_kbd_pdata));
438 printf("USB KBD: Error allocating private data\n");
442 /* Clear private data */
443 memset(data, 0, sizeof(struct usb_kbd_pdata));
445 /* allocate input buffer aligned and sized to USB DMA alignment */
446 data->new = memalign(USB_DMA_MINALIGN, roundup(8, USB_DMA_MINALIGN));
448 /* Insert private data into USB device structure */
451 /* Set IRQ handler */
452 dev->irq_handle = usb_kbd_irq;
454 pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
455 maxp = usb_maxpacket(dev, pipe);
457 /* We found a USB Keyboard, install it. */
458 usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
460 debug("USB KBD: found set idle...\n");
461 usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
463 debug("USB KBD: enable interrupt pipe...\n");
464 if (usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
465 ep->bInterval) < 0) {
466 printf("Failed to get keyboard state from device %04x:%04x\n",
467 dev->descriptor.idVendor, dev->descriptor.idProduct);
468 /* Abort, we don't want to use that non-functional keyboard. */
476 /* Search for keyboard and register it if found. */
477 int drv_usb_kbd_init(void)
479 struct stdio_dev usb_kbd_dev, *old_dev;
480 struct usb_device *dev;
481 char *stdinname = getenv("stdin");
484 /* Scan all USB Devices */
485 for (i = 0; i < USB_MAX_DEVICE; i++) {
486 /* Get USB device. */
487 dev = usb_get_dev_index(i);
491 if (dev->devnum == -1)
494 /* Try probing the keyboard */
495 if (usb_kbd_probe(dev, 0) != 1)
498 /* We found a keyboard, check if it is already registered. */
499 debug("USB KBD: found set up device.\n");
500 old_dev = stdio_get_by_name(DEVNAME);
502 /* Already registered, just return ok. */
503 debug("USB KBD: is already registered.\n");
504 usb_kbd_deregister();
508 /* Register the keyboard */
509 debug("USB KBD: register.\n");
510 memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
511 strcpy(usb_kbd_dev.name, DEVNAME);
512 usb_kbd_dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
513 usb_kbd_dev.putc = NULL;
514 usb_kbd_dev.puts = NULL;
515 usb_kbd_dev.getc = usb_kbd_getc;
516 usb_kbd_dev.tstc = usb_kbd_testc;
517 usb_kbd_dev.priv = (void *)dev;
518 error = stdio_register(&usb_kbd_dev);
522 #ifdef CONFIG_CONSOLE_MUX
523 error = iomux_doenv(stdin, stdinname);
527 /* Check if this is the standard input device. */
528 if (strcmp(stdinname, DEVNAME))
531 /* Reassign the console */
532 if (overwrite_console())
535 error = console_assign(stdin, DEVNAME);
543 /* No USB Keyboard found */
547 /* Deregister the keyboard. */
548 int usb_kbd_deregister(void)
550 #ifdef CONFIG_SYS_STDIO_DEREGISTER
551 return stdio_deregister(DEVNAME);