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676 lines
16 KiB
676 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* (C) Copyright 2001 |
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* Denis Peter, MPL AG Switzerland |
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* |
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* Part of this source has been derived from the Linux USB |
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* project. |
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*/ |
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#include <common.h> |
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#include <console.h> |
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#include <dm.h> |
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#include <errno.h> |
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#include <malloc.h> |
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#include <memalign.h> |
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#include <stdio_dev.h> |
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#include <watchdog.h> |
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#include <asm/byteorder.h> |
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|
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#include <usb.h> |
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|
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/* |
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* If overwrite_console returns 1, the stdin, stderr and stdout |
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* are switched to the serial port, else the settings in the |
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* environment are used |
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*/ |
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#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE |
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extern int overwrite_console(void); |
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#else |
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int overwrite_console(void) |
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{ |
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return 0; |
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} |
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#endif |
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|
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/* Keyboard sampling rate */ |
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#define REPEAT_RATE 40 /* 40msec -> 25cps */ |
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#define REPEAT_DELAY 10 /* 10 x REPEAT_RATE = 400msec */ |
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|
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#define NUM_LOCK 0x53 |
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#define CAPS_LOCK 0x39 |
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#define SCROLL_LOCK 0x47 |
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|
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/* Modifier bits */ |
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#define LEFT_CNTR (1 << 0) |
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#define LEFT_SHIFT (1 << 1) |
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#define LEFT_ALT (1 << 2) |
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#define LEFT_GUI (1 << 3) |
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#define RIGHT_CNTR (1 << 4) |
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#define RIGHT_SHIFT (1 << 5) |
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#define RIGHT_ALT (1 << 6) |
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#define RIGHT_GUI (1 << 7) |
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|
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/* Size of the keyboard buffer */ |
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#define USB_KBD_BUFFER_LEN 0x20 |
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|
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/* Device name */ |
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#define DEVNAME "usbkbd" |
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|
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/* Keyboard maps */ |
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static const unsigned char usb_kbd_numkey[] = { |
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'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', |
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'\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']', |
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'\\', '#', ';', '\'', '`', ',', '.', '/' |
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}; |
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static const unsigned char usb_kbd_numkey_shifted[] = { |
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'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', |
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'\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}', |
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'|', '~', ':', '"', '~', '<', '>', '?' |
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}; |
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static const unsigned char usb_kbd_num_keypad[] = { |
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'/', '*', '-', '+', '\r', |
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'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', |
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'.', 0, 0, 0, '=' |
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}; |
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|
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/* |
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* map arrow keys to ^F/^B ^N/^P, can't really use the proper |
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* ANSI sequence for arrow keys because the queuing code breaks |
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* when a single keypress expands to 3 queue elements |
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*/ |
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static const unsigned char usb_kbd_arrow[] = { |
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0x6, 0x2, 0xe, 0x10 |
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}; |
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|
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/* |
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* NOTE: It's important for the NUM, CAPS, SCROLL-lock bits to be in this |
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* order. See usb_kbd_setled() function! |
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*/ |
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#define USB_KBD_NUMLOCK (1 << 0) |
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#define USB_KBD_CAPSLOCK (1 << 1) |
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#define USB_KBD_SCROLLLOCK (1 << 2) |
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#define USB_KBD_CTRL (1 << 3) |
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#define USB_KBD_LEDMASK \ |
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(USB_KBD_NUMLOCK | USB_KBD_CAPSLOCK | USB_KBD_SCROLLLOCK) |
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|
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/* |
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* USB Keyboard reports are 8 bytes in boot protocol. |
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* Appendix B of HID Device Class Definition 1.11 |
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*/ |
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#define USB_KBD_BOOT_REPORT_SIZE 8 |
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struct usb_kbd_pdata { |
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unsigned long intpipe; |
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int intpktsize; |
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int intinterval; |
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unsigned long last_report; |
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struct int_queue *intq; |
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uint32_t repeat_delay; |
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uint32_t usb_in_pointer; |
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uint32_t usb_out_pointer; |
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uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN]; |
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uint8_t *new; |
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uint8_t old[USB_KBD_BOOT_REPORT_SIZE]; |
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uint8_t flags; |
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}; |
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extern int __maybe_unused net_busy_flag; |
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/* The period of time between two calls of usb_kbd_testc(). */ |
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static unsigned long __maybe_unused kbd_testc_tms; |
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|
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/* Puts character in the queue and sets up the in and out pointer. */ |
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static void usb_kbd_put_queue(struct usb_kbd_pdata *data, char c) |
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{ |
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if (data->usb_in_pointer == USB_KBD_BUFFER_LEN - 1) { |
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/* Check for buffer full. */ |
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if (data->usb_out_pointer == 0) |
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return; |
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data->usb_in_pointer = 0; |
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} else { |
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/* Check for buffer full. */ |
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if (data->usb_in_pointer == data->usb_out_pointer - 1) |
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return; |
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data->usb_in_pointer++; |
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} |
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data->usb_kbd_buffer[data->usb_in_pointer] = c; |
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} |
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/* |
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* Set the LEDs. Since this is used in the irq routine, the control job is |
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* issued with a timeout of 0. This means, that the job is queued without |
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* waiting for job completion. |
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*/ |
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static void usb_kbd_setled(struct usb_device *dev) |
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{ |
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struct usb_interface *iface = &dev->config.if_desc[0]; |
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struct usb_kbd_pdata *data = dev->privptr; |
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ALLOC_ALIGN_BUFFER(uint32_t, leds, 1, USB_DMA_MINALIGN); |
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*leds = data->flags & USB_KBD_LEDMASK; |
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usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
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USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
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0x200, iface->desc.bInterfaceNumber, leds, 1, 0); |
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} |
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#define CAPITAL_MASK 0x20 |
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/* Translate the scancode in ASCII */ |
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static int usb_kbd_translate(struct usb_kbd_pdata *data, unsigned char scancode, |
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unsigned char modifier, int pressed) |
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{ |
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uint8_t keycode = 0; |
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/* Key released */ |
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if (pressed == 0) { |
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data->repeat_delay = 0; |
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return 0; |
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} |
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if (pressed == 2) { |
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data->repeat_delay++; |
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if (data->repeat_delay < REPEAT_DELAY) |
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return 0; |
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data->repeat_delay = REPEAT_DELAY; |
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} |
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/* Alphanumeric values */ |
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if ((scancode > 3) && (scancode <= 0x1d)) { |
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keycode = scancode - 4 + 'a'; |
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if (data->flags & USB_KBD_CAPSLOCK) |
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keycode &= ~CAPITAL_MASK; |
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if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) { |
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/* Handle CAPSLock + Shift pressed simultaneously */ |
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if (keycode & CAPITAL_MASK) |
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keycode &= ~CAPITAL_MASK; |
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else |
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keycode |= CAPITAL_MASK; |
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} |
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} |
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if ((scancode > 0x1d) && (scancode < 0x39)) { |
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/* Shift pressed */ |
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if (modifier & (LEFT_SHIFT | RIGHT_SHIFT)) |
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keycode = usb_kbd_numkey_shifted[scancode - 0x1e]; |
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else |
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keycode = usb_kbd_numkey[scancode - 0x1e]; |
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} |
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/* Arrow keys */ |
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if ((scancode >= 0x4f) && (scancode <= 0x52)) |
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keycode = usb_kbd_arrow[scancode - 0x4f]; |
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/* Numeric keypad */ |
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if ((scancode >= 0x54) && (scancode <= 0x67)) |
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keycode = usb_kbd_num_keypad[scancode - 0x54]; |
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if (data->flags & USB_KBD_CTRL) |
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keycode = scancode - 0x3; |
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if (pressed == 1) { |
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if (scancode == NUM_LOCK) { |
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data->flags ^= USB_KBD_NUMLOCK; |
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return 1; |
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} |
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if (scancode == CAPS_LOCK) { |
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data->flags ^= USB_KBD_CAPSLOCK; |
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return 1; |
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} |
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if (scancode == SCROLL_LOCK) { |
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data->flags ^= USB_KBD_SCROLLLOCK; |
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return 1; |
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} |
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} |
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/* Report keycode if any */ |
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if (keycode) { |
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debug("%c", keycode); |
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usb_kbd_put_queue(data, keycode); |
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} |
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return 0; |
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} |
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static uint32_t usb_kbd_service_key(struct usb_device *dev, int i, int up) |
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{ |
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uint32_t res = 0; |
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struct usb_kbd_pdata *data = dev->privptr; |
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uint8_t *new; |
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uint8_t *old; |
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if (up) { |
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new = data->old; |
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old = data->new; |
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} else { |
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new = data->new; |
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old = data->old; |
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} |
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if ((old[i] > 3) && |
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(memscan(new + 2, old[i], USB_KBD_BOOT_REPORT_SIZE - 2) == |
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new + USB_KBD_BOOT_REPORT_SIZE)) { |
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res |= usb_kbd_translate(data, old[i], data->new[0], up); |
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} |
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return res; |
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} |
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/* Interrupt service routine */ |
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static int usb_kbd_irq_worker(struct usb_device *dev) |
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{ |
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struct usb_kbd_pdata *data = dev->privptr; |
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int i, res = 0; |
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/* No combo key pressed */ |
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if (data->new[0] == 0x00) |
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data->flags &= ~USB_KBD_CTRL; |
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/* Left or Right Ctrl pressed */ |
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else if ((data->new[0] == LEFT_CNTR) || (data->new[0] == RIGHT_CNTR)) |
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data->flags |= USB_KBD_CTRL; |
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for (i = 2; i < USB_KBD_BOOT_REPORT_SIZE; i++) { |
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res |= usb_kbd_service_key(dev, i, 0); |
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res |= usb_kbd_service_key(dev, i, 1); |
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} |
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/* Key is still pressed */ |
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if ((data->new[2] > 3) && (data->old[2] == data->new[2])) |
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res |= usb_kbd_translate(data, data->new[2], data->new[0], 2); |
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if (res == 1) |
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usb_kbd_setled(dev); |
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memcpy(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE); |
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return 1; |
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} |
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/* Keyboard interrupt handler */ |
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static int usb_kbd_irq(struct usb_device *dev) |
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{ |
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if ((dev->irq_status != 0) || |
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(dev->irq_act_len != USB_KBD_BOOT_REPORT_SIZE)) { |
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debug("USB KBD: Error %lX, len %d\n", |
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dev->irq_status, dev->irq_act_len); |
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return 1; |
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} |
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return usb_kbd_irq_worker(dev); |
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} |
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/* Interrupt polling */ |
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static inline void usb_kbd_poll_for_event(struct usb_device *dev) |
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{ |
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#if defined(CONFIG_SYS_USB_EVENT_POLL) |
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struct usb_kbd_pdata *data = dev->privptr; |
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/* Submit a interrupt transfer request */ |
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usb_submit_int_msg(dev, data->intpipe, &data->new[0], data->intpktsize, |
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data->intinterval); |
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usb_kbd_irq_worker(dev); |
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#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) || \ |
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defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE) |
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#if defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) |
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struct usb_interface *iface; |
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struct usb_kbd_pdata *data = dev->privptr; |
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iface = &dev->config.if_desc[0]; |
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usb_get_report(dev, iface->desc.bInterfaceNumber, |
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1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE); |
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if (memcmp(data->old, data->new, USB_KBD_BOOT_REPORT_SIZE)) { |
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usb_kbd_irq_worker(dev); |
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#else |
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struct usb_kbd_pdata *data = dev->privptr; |
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if (poll_int_queue(dev, data->intq)) { |
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usb_kbd_irq_worker(dev); |
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/* We've consumed all queued int packets, create new */ |
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destroy_int_queue(dev, data->intq); |
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data->intq = create_int_queue(dev, data->intpipe, 1, |
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USB_KBD_BOOT_REPORT_SIZE, data->new, |
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data->intinterval); |
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#endif |
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data->last_report = get_timer(0); |
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/* Repeat last usb hid report every REPEAT_RATE ms for keyrepeat */ |
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} else if (data->last_report != -1 && |
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get_timer(data->last_report) > REPEAT_RATE) { |
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usb_kbd_irq_worker(dev); |
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data->last_report = get_timer(0); |
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} |
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#endif |
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} |
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/* test if a character is in the queue */ |
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static int usb_kbd_testc(struct stdio_dev *sdev) |
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{ |
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struct stdio_dev *dev; |
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struct usb_device *usb_kbd_dev; |
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struct usb_kbd_pdata *data; |
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#ifdef CONFIG_CMD_NET |
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/* |
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* If net_busy_flag is 1, NET transfer is running, |
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* then we check key-pressed every second (first check may be |
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* less than 1 second) to improve TFTP booting performance. |
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*/ |
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if (net_busy_flag && (get_timer(kbd_testc_tms) < CONFIG_SYS_HZ)) |
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return 0; |
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kbd_testc_tms = get_timer(0); |
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#endif |
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dev = stdio_get_by_name(sdev->name); |
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usb_kbd_dev = (struct usb_device *)dev->priv; |
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data = usb_kbd_dev->privptr; |
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usb_kbd_poll_for_event(usb_kbd_dev); |
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return !(data->usb_in_pointer == data->usb_out_pointer); |
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} |
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/* gets the character from the queue */ |
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static int usb_kbd_getc(struct stdio_dev *sdev) |
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{ |
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struct stdio_dev *dev; |
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struct usb_device *usb_kbd_dev; |
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struct usb_kbd_pdata *data; |
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dev = stdio_get_by_name(sdev->name); |
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usb_kbd_dev = (struct usb_device *)dev->priv; |
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data = usb_kbd_dev->privptr; |
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while (data->usb_in_pointer == data->usb_out_pointer) { |
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WATCHDOG_RESET(); |
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usb_kbd_poll_for_event(usb_kbd_dev); |
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} |
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if (data->usb_out_pointer == USB_KBD_BUFFER_LEN - 1) |
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data->usb_out_pointer = 0; |
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else |
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data->usb_out_pointer++; |
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return data->usb_kbd_buffer[data->usb_out_pointer]; |
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} |
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/* probes the USB device dev for keyboard type. */ |
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static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum) |
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{ |
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struct usb_interface *iface; |
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struct usb_endpoint_descriptor *ep; |
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struct usb_kbd_pdata *data; |
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if (dev->descriptor.bNumConfigurations != 1) |
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return 0; |
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iface = &dev->config.if_desc[ifnum]; |
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if (iface->desc.bInterfaceClass != USB_CLASS_HID) |
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return 0; |
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if (iface->desc.bInterfaceSubClass != USB_SUB_HID_BOOT) |
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return 0; |
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if (iface->desc.bInterfaceProtocol != USB_PROT_HID_KEYBOARD) |
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return 0; |
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if (iface->desc.bNumEndpoints != 1) |
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return 0; |
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ep = &iface->ep_desc[0]; |
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/* Check if endpoint 1 is interrupt endpoint */ |
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if (!(ep->bEndpointAddress & 0x80)) |
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return 0; |
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if ((ep->bmAttributes & 3) != 3) |
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return 0; |
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debug("USB KBD: found set protocol...\n"); |
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data = malloc(sizeof(struct usb_kbd_pdata)); |
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if (!data) { |
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printf("USB KBD: Error allocating private data\n"); |
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return 0; |
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} |
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/* Clear private data */ |
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memset(data, 0, sizeof(struct usb_kbd_pdata)); |
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|
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/* allocate input buffer aligned and sized to USB DMA alignment */ |
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data->new = memalign(USB_DMA_MINALIGN, |
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roundup(USB_KBD_BOOT_REPORT_SIZE, USB_DMA_MINALIGN)); |
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/* Insert private data into USB device structure */ |
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dev->privptr = data; |
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/* Set IRQ handler */ |
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dev->irq_handle = usb_kbd_irq; |
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data->intpipe = usb_rcvintpipe(dev, ep->bEndpointAddress); |
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data->intpktsize = min(usb_maxpacket(dev, data->intpipe), |
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USB_KBD_BOOT_REPORT_SIZE); |
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data->intinterval = ep->bInterval; |
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data->last_report = -1; |
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/* We found a USB Keyboard, install it. */ |
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usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0); |
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debug("USB KBD: found set idle...\n"); |
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#if !defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) && \ |
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!defined(CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE) |
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usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE / 4, 0); |
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#else |
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usb_set_idle(dev, iface->desc.bInterfaceNumber, 0, 0); |
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#endif |
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debug("USB KBD: enable interrupt pipe...\n"); |
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#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE |
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data->intq = create_int_queue(dev, data->intpipe, 1, |
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USB_KBD_BOOT_REPORT_SIZE, data->new, |
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data->intinterval); |
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if (!data->intq) { |
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#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP) |
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if (usb_get_report(dev, iface->desc.bInterfaceNumber, |
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1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE) < 0) { |
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#else |
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if (usb_submit_int_msg(dev, data->intpipe, data->new, data->intpktsize, |
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data->intinterval) < 0) { |
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#endif |
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printf("Failed to get keyboard state from device %04x:%04x\n", |
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dev->descriptor.idVendor, dev->descriptor.idProduct); |
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/* Abort, we don't want to use that non-functional keyboard. */ |
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return 0; |
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} |
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|
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/* Success. */ |
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return 1; |
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} |
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|
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static int probe_usb_keyboard(struct usb_device *dev) |
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{ |
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char *stdinname; |
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struct stdio_dev usb_kbd_dev; |
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int error; |
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|
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/* Try probing the keyboard */ |
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if (usb_kbd_probe_dev(dev, 0) != 1) |
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return -ENOENT; |
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|
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/* Register the keyboard */ |
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debug("USB KBD: register.\n"); |
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memset(&usb_kbd_dev, 0, sizeof(struct stdio_dev)); |
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strcpy(usb_kbd_dev.name, DEVNAME); |
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usb_kbd_dev.flags = DEV_FLAGS_INPUT; |
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usb_kbd_dev.getc = usb_kbd_getc; |
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usb_kbd_dev.tstc = usb_kbd_testc; |
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usb_kbd_dev.priv = (void *)dev; |
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error = stdio_register(&usb_kbd_dev); |
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if (error) |
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return error; |
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stdinname = env_get("stdin"); |
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#if CONFIG_IS_ENABLED(CONSOLE_MUX) |
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error = iomux_doenv(stdin, stdinname); |
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if (error) |
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return error; |
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#else |
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/* Check if this is the standard input device. */ |
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if (strcmp(stdinname, DEVNAME)) |
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return 1; |
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|
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/* Reassign the console */ |
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if (overwrite_console()) |
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return 1; |
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error = console_assign(stdin, DEVNAME); |
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if (error) |
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return error; |
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#endif |
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return 0; |
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} |
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|
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#ifndef CONFIG_DM_USB |
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/* Search for keyboard and register it if found. */ |
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int drv_usb_kbd_init(void) |
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{ |
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int error, i; |
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|
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debug("%s: Probing for keyboard\n", __func__); |
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/* Scan all USB Devices */ |
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for (i = 0; i < USB_MAX_DEVICE; i++) { |
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struct usb_device *dev; |
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|
|
/* Get USB device. */ |
|
dev = usb_get_dev_index(i); |
|
if (!dev) |
|
break; |
|
|
|
if (dev->devnum == -1) |
|
continue; |
|
|
|
error = probe_usb_keyboard(dev); |
|
if (!error) |
|
return 1; |
|
if (error && error != -ENOENT) |
|
return error; |
|
} |
|
|
|
/* No USB Keyboard found */ |
|
return -1; |
|
} |
|
|
|
/* Deregister the keyboard. */ |
|
int usb_kbd_deregister(int force) |
|
{ |
|
#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER) |
|
struct stdio_dev *dev; |
|
struct usb_device *usb_kbd_dev; |
|
struct usb_kbd_pdata *data; |
|
|
|
dev = stdio_get_by_name(DEVNAME); |
|
if (dev) { |
|
usb_kbd_dev = (struct usb_device *)dev->priv; |
|
data = usb_kbd_dev->privptr; |
|
if (stdio_deregister_dev(dev, force) != 0) |
|
return 1; |
|
#if CONFIG_IS_ENABLED(CONSOLE_MUX) |
|
if (iomux_doenv(stdin, env_get("stdin")) != 0) |
|
return 1; |
|
#endif |
|
#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE |
|
destroy_int_queue(usb_kbd_dev, data->intq); |
|
#endif |
|
free(data->new); |
|
free(data); |
|
} |
|
|
|
return 0; |
|
#else |
|
return 1; |
|
#endif |
|
} |
|
|
|
#endif |
|
|
|
#ifdef CONFIG_DM_USB |
|
|
|
static int usb_kbd_probe(struct udevice *dev) |
|
{ |
|
struct usb_device *udev = dev_get_parent_priv(dev); |
|
|
|
return probe_usb_keyboard(udev); |
|
} |
|
|
|
static int usb_kbd_remove(struct udevice *dev) |
|
{ |
|
struct usb_device *udev = dev_get_parent_priv(dev); |
|
struct usb_kbd_pdata *data; |
|
struct stdio_dev *sdev; |
|
int ret; |
|
|
|
sdev = stdio_get_by_name(DEVNAME); |
|
if (!sdev) { |
|
ret = -ENXIO; |
|
goto err; |
|
} |
|
data = udev->privptr; |
|
if (stdio_deregister_dev(sdev, true)) { |
|
ret = -EPERM; |
|
goto err; |
|
} |
|
#if CONFIG_IS_ENABLED(CONSOLE_MUX) |
|
if (iomux_doenv(stdin, env_get("stdin"))) { |
|
ret = -ENOLINK; |
|
goto err; |
|
} |
|
#endif |
|
#ifdef CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE |
|
destroy_int_queue(udev, data->intq); |
|
#endif |
|
free(data->new); |
|
free(data); |
|
|
|
return 0; |
|
err: |
|
printf("%s: warning, ret=%d", __func__, ret); |
|
return ret; |
|
} |
|
|
|
static const struct udevice_id usb_kbd_ids[] = { |
|
{ .compatible = "usb-keyboard" }, |
|
{ } |
|
}; |
|
|
|
U_BOOT_DRIVER(usb_kbd) = { |
|
.name = "usb_kbd", |
|
.id = UCLASS_KEYBOARD, |
|
.of_match = usb_kbd_ids, |
|
.probe = usb_kbd_probe, |
|
.remove = usb_kbd_remove, |
|
}; |
|
|
|
static const struct usb_device_id kbd_id_table[] = { |
|
{ |
|
.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS | |
|
USB_DEVICE_ID_MATCH_INT_SUBCLASS | |
|
USB_DEVICE_ID_MATCH_INT_PROTOCOL, |
|
.bInterfaceClass = USB_CLASS_HID, |
|
.bInterfaceSubClass = USB_SUB_HID_BOOT, |
|
.bInterfaceProtocol = USB_PROT_HID_KEYBOARD, |
|
}, |
|
{ } /* Terminating entry */ |
|
}; |
|
|
|
U_BOOT_USB_DEVICE(usb_kbd, kbd_id_table); |
|
|
|
#endif
|
|
|