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 #define USB_KBD_PRINTF(fmt, args...) printf(fmt, ##args)
37 #define USB_KBD_PRINTF(fmt, args...)
41 * If overwrite_console returns 1, the stdin, stderr and stdout
42 * are switched to the serial port, else the settings in the
43 * environment are used
45 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
46 extern int overwrite_console(void);
48 int overwrite_console(void)
54 /* Keyboard sampling rate */
55 #define REPEAT_RATE (40 / 4) /* 40msec -> 25cps */
56 #define REPEAT_DELAY 10 /* 10 x REPEAT_RATE = 400msec */
59 #define CAPS_LOCK 0x39
60 #define SCROLL_LOCK 0x47
63 #define LEFT_CNTR (1 << 0)
64 #define LEFT_SHIFT (1 << 1)
65 #define LEFT_ALT (1 << 2)
66 #define LEFT_GUI (1 << 3)
67 #define RIGHT_CNTR (1 << 4)
68 #define RIGHT_SHIFT (1 << 5)
69 #define RIGHT_ALT (1 << 6)
70 #define RIGHT_GUI (1 << 7)
72 /* Size of the keyboard buffer */
73 #define USB_KBD_BUFFER_LEN 0x20
76 #define DEVNAME "usbkbd"
79 static const unsigned char usb_kbd_numkey[] = {
80 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
81 '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
82 '\\', '#', ';', '\'', '`', ',', '.', '/'
84 static const unsigned char usb_kbd_numkey_shifted[] = {
85 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
86 '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
87 '|', '~', ':', '"', '~', '<', '>', '?'
90 static const unsigned char usb_kbd_num_keypad[] = {
91 '/', '*', '-', '+', '\r',
92 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
97 * NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this
98 * order. See usb_kbd_setled() function!
100 #define USB_KBD_NUMLOCK (1 << 0)
101 #define USB_KBD_CAPSLOCK (1 << 1)
102 #define USB_KBD_SCROLLLOCK (1 << 2)
103 #define USB_KBD_CTRL (1 << 3)
105 #define USB_KBD_LEDMASK \
106 (USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK)
108 struct usb_kbd_pdata {
109 uint32_t repeat_delay;
111 uint32_t usb_in_pointer;
112 uint32_t usb_out_pointer;
113 uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN];
121 /* Generic keyboard event polling. */
122 void usb_kbd_generic_poll(void)
124 struct stdio_dev *dev;
125 struct usb_device *usb_kbd_dev;
126 struct usb_kbd_pdata *data;
127 struct usb_interface *iface;
128 struct usb_endpoint_descriptor *ep;
132 /* Get the pointer to USB Keyboard device pointer */
133 dev = stdio_get_by_name(DEVNAME);
134 usb_kbd_dev = (struct usb_device *)dev->priv;
135 data = usb_kbd_dev->privptr;
136 iface = &usb_kbd_dev->config.if_desc[0];
137 ep = &iface->ep_desc[0];
138 pipe = usb_rcvintpipe(usb_kbd_dev, ep->bEndpointAddress);
140 /* Submit a interrupt transfer request */
141 maxp = usb_maxpacket(usb_kbd_dev, pipe);
142 usb_submit_int_msg(usb_kbd_dev, pipe, data->new,
143 maxp > 8 ? 8 : maxp, ep->bInterval);
146 /* Puts character in the queue and sets up the in and out pointer. */
147 static void usb_kbd_put_queue(struct usb_kbd_pdata *data, char c)
149 if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) {
150 /* Check for buffer full. */
151 if (data->usb_out_pointer == 0)
154 data->usb_in_pointer = 0;
156 /* Check for buffer full. */
157 if (data->usb_in_pointer == data->usb_out_pointer - 1)
160 data->usb_in_pointer++;
163 data->usb_kbd_buffer[data->usb_in_pointer] = c;
167 * Set the LEDs. Since this is used in the irq routine, the control job is
168 * issued with a timeout of 0. This means, that the job is queued without
169 * waiting for job completion.
171 static void usb_kbd_setled(struct usb_device *dev)
173 struct usb_interface *iface = &dev->config.if_desc[0];
174 struct usb_kbd_pdata *data = dev->privptr;
175 uint32_t leds = data->flags & USB_KBD_LEDMASK;
177 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
178 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
179 0x200, iface->desc.bInterfaceNumber, (void *)&leds, 1, 0);
182 #define CAPITAL_MASK 0x20
183 /* Translate the scancode in ASCII */
184 static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode,
185 unsigned char modifier, int pressed)
191 data->repeat_delay = 0;
196 data->repeat_delay++;
197 if (data->repeat_delay < REPEAT_DELAY)
200 data->repeat_delay = REPEAT_DELAY;
203 /* Alphanumeric values */
204 if ((scancode > 3) && (scancode <= 0x1d)) {
205 keycode = scancode - 4 + 'a';
207 if (data->flags & USB_KBD_CAPSLOCK)
208 keycode &= ~CAPITAL_MASK;
210 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) {
211 /* Handle CAPSLock + Shift pressed simultaneously */
212 if (keycode & CAPITAL_MASK)
213 keycode &= ~CAPITAL_MASK;
215 keycode |= CAPITAL_MASK;
219 if ((scancode > 0x1d) && (scancode < 0x3a)) {
221 if (modifier & (LEFT_SHIFT | RIGHT_SHIFT))
222 keycode = usb_kbd_numkey_shifted[scancode - 0x1e];
224 keycode = usb_kbd_numkey[scancode - 0x1e];
228 if ((scancode >= 0x54) && (scancode <= 0x67))
229 keycode = usb_kbd_num_keypad[scancode - 0x54];
231 if (data->flags & USB_KBD_CTRL)
232 keycode = scancode - 0x3;
235 if (scancode == NUM_LOCK) {
236 data->flags ^= USB_KBD_NUMLOCK;
240 if (scancode == CAPS_LOCK) {
241 data->flags ^= USB_KBD_CAPSLOCK;
244 if (scancode == SCROLL_LOCK) {
245 data->flags ^= USB_KBD_SCROLLLOCK;
250 /* Report keycode if any */
252 USB_KBD_PRINTF("%c", keycode);
253 usb_kbd_put_queue(data, keycode);
259 static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up)
262 struct usb_kbd_pdata *data = dev->privptr;
274 if ((old[i] > 3) && (memscan(new + 2, old[i], 6) == new + 8))
275 res |= usb_kbd_translate(data, old[i], data->new[0], up);
280 /* Interrupt service routine */
281 static int usb_kbd_irq_worker(struct usb_device *dev)
283 struct usb_kbd_pdata *data = dev->privptr;
286 /* No combo key pressed */
287 if (data->new[0] == 0x00)
288 data->flags &= ~USB_KBD_CTRL;
289 /* Left or Right Ctrl pressed */
290 else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR))
291 data->flags |= USB_KBD_CTRL;
293 for (i = 2; i < 8; i++) {
294 res |= usb_kbd_service_key(dev, i, 0);
295 res |= usb_kbd_service_key(dev, i, 1);
298 /* Key is still pressed */
299 if ((data->new[2] > 3) && (data->old[2] == data->new[2]))
300 res |= usb_kbd_translate(data, data->new[2], data->new[0], 2);
305 memcpy(data->old, data->new, 8);
310 /* Keyboard interrupt handler */
311 static int usb_kbd_irq(struct usb_device *dev)
313 if ((dev->irq_status != 0) || (dev->irq_act_len != 8)) {
314 USB_KBD_PRINTF("USB KBD: Error %lX, len %d\n",
315 dev->irq_status, dev->irq_act_len);
319 return usb_kbd_irq_worker(dev);
322 /* Interrupt polling */
323 static inline void usb_kbd_poll_for_event(struct usb_device *dev)
325 #if defined(CONFIG_SYS_USB_EVENT_POLL)
327 usb_kbd_irq_worker(dev);
328 #elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
329 struct usb_interface *iface;
330 struct usb_kbd_pdata *data = dev->privptr;
331 iface = &dev->config.if_desc[0];
332 usb_get_report(dev, iface->desc.bInterfaceNumber,
333 1, 0, data->new, sizeof(data->new));
334 if (memcmp(data->old, data->new, sizeof(data->new)))
335 usb_kbd_irq_worker(dev);
339 /* test if a character is in the queue */
340 static int usb_kbd_testc(void)
342 struct stdio_dev *dev;
343 struct usb_device *usb_kbd_dev;
344 struct usb_kbd_pdata *data;
346 dev = stdio_get_by_name(DEVNAME);
347 usb_kbd_dev = (struct usb_device *)dev->priv;
348 data = usb_kbd_dev->privptr;
350 usb_kbd_poll_for_event(usb_kbd_dev);
352 return !(data->usb_in_pointer == data->usb_out_pointer);
355 /* gets the character from the queue */
356 static int usb_kbd_getc(void)
358 struct stdio_dev *dev;
359 struct usb_device *usb_kbd_dev;
360 struct usb_kbd_pdata *data;
362 dev = stdio_get_by_name(DEVNAME);
363 usb_kbd_dev = (struct usb_device *)dev->priv;
364 data = usb_kbd_dev->privptr;
366 while (data->usb_in_pointer == data->usb_out_pointer)
367 usb_kbd_poll_for_event(usb_kbd_dev);
369 if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1)
370 data->usb_out_pointer = 0;
372 data->usb_out_pointer++;
374 return data->usb_kbd_buffer[data->usb_out_pointer];
377 /* probes the USB device dev for keyboard type. */
378 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
380 struct usb_interface *iface;
381 struct usb_endpoint_descriptor *ep;
382 struct usb_kbd_pdata *data;
385 if (dev->descriptor.bNumConfigurations != 1)
388 iface = &dev->config.if_desc[ifnum];
390 if (iface->desc.bInterfaceClass != 3)
393 if (iface->desc.bInterfaceSubClass != 1)
396 if (iface->desc.bInterfaceProtocol != 1)
399 if (iface->desc.bNumEndpoints != 1)
402 ep = &iface->ep_desc[0];
404 /* Check if endpoint 1 is interrupt endpoint */
405 if (!(ep->bEndpointAddress & 0x80))
408 if ((ep->bmAttributes & 3) != 3)
411 USB_KBD_PRINTF("USB KBD: found set protocol...\n");
413 data = malloc(sizeof(struct usb_kbd_pdata));
415 printf("USB KBD: Error allocating private data\n");
419 /* Clear private data */
420 memset(data, 0, sizeof(struct usb_kbd_pdata));
422 /* Insert private data into USB device structure */
425 /* Set IRQ handler */
426 dev->irq_handle = usb_kbd_irq;
428 pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
429 maxp = usb_maxpacket(dev, pipe);
431 /* We found a USB Keyboard, install it. */
432 usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
434 USB_KBD_PRINTF("USB KBD: found set idle...\n");
435 usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
437 USB_KBD_PRINTF("USB KBD: enable interrupt pipe...\n");
438 usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
445 /* Search for keyboard and register it if found. */
446 int drv_usb_kbd_init(void)
448 struct stdio_dev usb_kbd_dev, *old_dev;
449 struct usb_device *dev;
450 char *stdinname = getenv("stdin");
453 /* Scan all USB Devices */
454 for (i = 0; i < USB_MAX_DEVICE; i++) {
455 /* Get USB device. */
456 dev = usb_get_dev_index(i);
460 if (dev->devnum == -1)
463 /* Try probing the keyboard */
464 if (usb_kbd_probe(dev, 0) != 1)
467 /* We found a keyboard, check if it is already registered. */
468 USB_KBD_PRINTF("USB KBD: found set up device.\n");
469 old_dev = stdio_get_by_name(DEVNAME);
471 /* Already registered, just return ok. */
472 USB_KBD_PRINTF("USB KBD: is already registered.\n");
476 /* Register the keyboard */
477 USB_KBD_PRINTF("USB KBD: register.\n");
478 memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev));
479 strcpy(usb_kbd_dev.name, DEVNAME);
480 usb_kbd_dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
481 usb_kbd_dev.putc = NULL;
482 usb_kbd_dev.puts = NULL;
483 usb_kbd_dev.getc = usb_kbd_getc;
484 usb_kbd_dev.tstc = usb_kbd_testc;
485 usb_kbd_dev.priv = (void *)dev;
486 error = stdio_register(&usb_kbd_dev);
490 /* Check if this is the standard input device. */
491 if (strcmp(stdinname, DEVNAME))
494 /* Reassign the console */
495 if (overwrite_console())
498 error = console_assign(stdin, DEVNAME);
505 /* No USB Keyboard found */
509 /* Deregister the keyboard. */
510 int usb_kbd_deregister(void)
512 #ifdef CONFIG_SYS_STDIO_DEREGISTER
513 return stdio_deregister(DEVNAME);