LCOM1920-T5G03

#ifndef KBC_H_INCLUDED

#define KBC_H_INCLUDED

/**

 * @defgroup    kbc kbc

 * @brief   KBC module.

 *

 * @{

 */

/* KBC IRQ Line */

/** @brief KBC Controller IRQ Line */

#define KBC_IRQ     1

/** @brief Mouse IRQ Line */

#define MOUSE_IRQ   12

/* Delay for KBC */

/** @brief KBC Response Delay */

#define DELAY           20000

/** @brief Number of tries to issue command before timeout */

#define KBC_NUM_TRIES   20

/* I/O Ports Addresses */

/** @brief Address to send commands to KBC */

#define KBC_CMD     0x64

/** @brief Address to write KBC Command Arguments */

#define KBC_CMD_ARG 0x60

/** @brief KBC Status Register address */

#define STATUS_REG  0x64

/** @brief Address of Output Buffer of KBC */

#define OUTPUT_BUF  0x60

/* KBC Commands */

/** @brief Read KBC Command Byte */

#define READ_KBC_CMD    0x20

/** @brief Write KBC Command Byte */

#define WRITE_KBC_CMD   0x60

/** @brief KBC Diagnostic Tests */

#define KBC_SELF_TEST   0xAA

/** @brief Tests Keyboard Clock and Data lines */

#define KBC_INT_TEST    0xAB

/** @brief Disable KBC Interface */

#define KBC_INT_DISABLE 0xAD

/** @brief Enable KBC Interface */

#define KBC_INT_ENABLE  0xAE

/** @brief Disable Mouse */

#define MOUSE_DISABLE   0xA7

/** @brief Enable Mouse */

#define MOUSE_ENABLE    0xA8

/** @brief Tests Mouse data line */

#define MOUSE_INT_TEST  0xA9

/** @brief Write a byte directly to the mouse */

#define MOUSE_WRITE_B   0xD4

/* Status Byte Masking */

/** @brief Output Buffer State */

#define OUT_BUF_FUL     BIT(0)

/** @brief Input Buffer State */

#define IN_BUF_FULL     BIT(1)

/** @brief System Flag */

#define SYS_FLAG        BIT(2)

/** @brief Identifier of type of byte in input buffer */

#define DATA_CMD_WRITE  BIT(3)

/** @brief Keyboard inihibited */

#define INH_FLAG        BIT(4)

/** @brief Mouse Data */

#define AUX_MOUSE       BIT(5)

/** @brief Time Out Error - Invalid Data */

#define TIME_OUT_REC    BIT(6)

/** @brief Parity Error - Invalid Data */

#define PARITY_ERROR    BIT(7)

/* Scancode Constants */

/** @brief ESC Break Code */

#define ESC_BREAK_CODE  0x81

/** @brief First byte of a two byte Scancode */

#define TWO_BYTE_CODE   0xE0

/** @brief Bit to distinguish between Make code and Break code */

#define BREAK_CODE_BIT  BIT(7)

/* Command byte masks */

/** @brief Enable Keyboard Interrupts */

#define INT_KBD         BIT(0)

/** @brief Enable Mouse Interrupts */

#define INT_MOU         BIT(1)

/** @brief Disable Keyboard */

#define DIS_KBD         BIT(4)

/** @brief Disable Mouse */

#define DIS_MOU         BIT(5)

/**

 * @brief High-level function that reads the command byte of the KBC

 * @param cmd Pointer to variable where command byte read from KBC will be stored

 * @return 0 if operation was successful, 1 otherwise

 */

int (kbc_read_cmd)(uint8_t *cmd);

/**

 * @brief High-level function that changes the command byte of the KBC

 * @param cmd New value for command byte of KBC

 * @return 0 if operation was successful, 1 otherwise

 */

int (kbc_change_cmd)(uint8_t cmd);

/**

 * @brief High-level function that restores KBC to normal state

 *

 * High-level function that restores KBC to normal state, because lcf_start

 * changes the command byte of KBC. If this function is not used, there is a

 * chance that the keyboard and keyboard interrupts remain disabled.

 * @return 0 if operation was successful, 1 otherwise

 */

int (kbc_restore_keyboard)();

/**

 * @brief Low-level function to issue a command to keyboard

 * @param cmd command to be issued

 * @return 0 if operation was successful, 1 otherwise

 */

int (kbc_issue_cmd)(uint8_t cmd);

/**

 * @brief Low-level function to issue an argument of a command

 * @param arg argument to be issued

 * @return 0 if operation was successful, 1 otherwise

 */

int (kbc_issue_arg)(uint8_t arg);

/**

 * @brief Low-level function for reading byte from keyboard

 *

 * Low-level function for reading byte from keyboard. Waits until output buffer

 * is full

 * @param byte Pointer to variable where byte read from keyboard will be stored

 * @return 0 if operation was successful, 1 otherwise

 */

int (kbc_read_byte)(uint8_t *byte);

/**

 * @}

 */

#endif //KBC_H_INCLUDED