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e84421d8f3
Add a uclass for keyboard input, mirroring the existing stdio methods. This is enabled by a new CONFIG_DM_KEYBOARD option. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
#ifndef __KEYBOARD_H
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#define __KEYBOARD_H
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#ifdef CONFIG_DM_KEYBOARD
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#include <input.h>
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#include <stdio_dev.h>
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/**
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* struct keyboard_priv - information about a keyboard, for the uclass
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*
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* @sdev: stdio device
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* @input: input configuration (the driver may use this if desired)
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*/
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struct keyboard_priv {
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struct stdio_dev sdev;
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/*
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* This is set up by the uclass but will only be used if the driver
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* sets input.dev to its device pointer (it is initially NULL).
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*/
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struct input_config input;
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};
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/**
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* struct keyboard_ops - keyboard device operations
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*/
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struct keyboard_ops {
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/**
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* start() - enable the keyboard ready for use
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*
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* @dev: Device to enable
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* @return 0 if OK, -ve on error
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*/
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int (*start)(struct udevice *dev);
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/**
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* stop() - disable the keyboard when no-longer needed
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*
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* @dev: Device to disable
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* @return 0 if OK, -ve on error
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*/
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int (*stop)(struct udevice *dev);
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/**
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* tstc() - check if a key is available
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*
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* @dev: Device to check
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* @return 0 if no key is available, 1 if a key is available, -ve on
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* error
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*/
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int (*tstc)(struct udevice *dev);
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/**
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* getc() - get a key
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*
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* TODO(sjg@chromium.org): At present this method may wait if it calls
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* input_getc().
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*
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* @dev: Device to read from
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* @return -EAGAIN if no key is available, otherwise key value read
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* (as ASCII).
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*/
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int (*getc)(struct udevice *dev);
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/**
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* update_leds() - update keyboard LEDs
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*
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* This is called when the LEDs have changed and need to be updated.
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* For example, if 'caps lock' is pressed then this method will be
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* called with the new LED value.
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*
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* @dev: Device to update
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* @leds: New LED mask (see INPUT_LED_... in input.h)
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*/
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int (*update_leds)(struct udevice *dev, int leds);
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};
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#define keyboard_get_ops(dev) ((struct keyboard_ops *)(dev)->driver->ops)
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#else
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#ifdef CONFIG_PS2MULT
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#include <ps2mult.h>
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#endif
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#if !defined(kbd_request_region) || \
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!defined(kbd_request_irq) || \
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!defined(kbd_read_input) || \
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!defined(kbd_read_status) || \
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!defined(kbd_write_output) || \
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!defined(kbd_write_command)
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#error PS/2 low level routines not defined
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#endif
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extern int kbd_init (void);
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extern void handle_scancode(unsigned char scancode);
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extern int kbd_init_hw(void);
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extern void pckbd_leds(unsigned char leds);
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#endif /* !CONFIG_DM_KEYBOARD */
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#endif /* __KEYBOARD_H */
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