ps2_mouse.h

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/*
 *  include/linux/pc_keyb.h
 *  PC Keyboard And Keyboard Controller
 *  (c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
 *
 * RTEMS port: by Rosimildo da Silva.
 *
 * This module was ported from Linux.
 *
 */

/*
 *  Configuration Switches
 */

#undef KBD_REPORT_ERR           /* Report keyboard errors */
#define KBD_REPORT_UNKN         /* Report unknown scan codes */
#define KBD_REPORT_TIMEOUTS     /* Report keyboard timeouts */
#undef KBD_IS_FOCUS_9000        /* We have the brain-damaged FOCUS-9000 keyboard */
#undef INITIALIZE_MOUSE         /* Define if your PS/2 mouse needs initialization. */

#define KBD_INIT_TIMEOUT 1000       /* Timeout in ms for initializing the keyboard */
#define KBC_TIMEOUT 250         /* Timeout in ms for sending to keyboard controller */
#define KBD_TIMEOUT 1000        /* Timeout in ms for keyboard command acknowledge */

/*
 *  Internal variables of the driver
 */

extern unsigned char pckbd_read_mask;
extern unsigned char aux_device_present;

/*
 *  Keyboard Controller Registers on normal PCs.
 */

#define KBD_STATUS_REG      0x64    /* Status register (R) */
#define KBD_CNTL_REG        0x64    /* Controller command register (W) */
#define KBD_DATA_REG        0x60    /* Keyboard data register (R/W) */

/*
 *  Keyboard Controller Commands
 */

#define KBD_CCMD_READ_MODE  0x20    /* Read mode bits */
#define KBD_CCMD_WRITE_MODE 0x60    /* Write mode bits */
#define KBD_CCMD_GET_VERSION    0xA1    /* Get controller version */
#define KBD_CCMD_MOUSE_DISABLE  0xA7    /* Disable mouse interface */
#define KBD_CCMD_MOUSE_ENABLE   0xA8    /* Enable mouse interface */
#define KBD_CCMD_TEST_MOUSE 0xA9    /* Mouse interface test */
#define KBD_CCMD_SELF_TEST  0xAA    /* Controller self test */
#define KBD_CCMD_KBD_TEST   0xAB    /* Keyboard interface test */
#define KBD_CCMD_KBD_DISABLE    0xAD    /* Keyboard interface disable */
#define KBD_CCMD_KBD_ENABLE 0xAE    /* Keyboard interface enable */
#define KBD_CCMD_WRITE_AUX_OBUF 0xD3    /* Write to output buffer as if
                       initiated by the auxiliary device */
#define KBD_CCMD_WRITE_MOUSE    0xD4    /* Write the following byte to the mouse */

/*
 *  Keyboard Commands
 */

#define KBD_CMD_SET_LEDS    0xED    /* Set keyboard leds */
#define KBD_CMD_SET_RATE    0xF3    /* Set typematic rate */
#define KBD_CMD_ENABLE      0xF4    /* Enable scanning */
#define KBD_CMD_DISABLE     0xF5    /* Disable scanning */
#define KBD_CMD_RESET       0xFF    /* Reset */

/*
 *  Keyboard Replies
 */

#define KBD_REPLY_POR       0xAA    /* Power on reset */
#define KBD_REPLY_ACK       0xFA    /* Command ACK */
#define KBD_REPLY_RESEND    0xFE    /* Command NACK, send the cmd again */

/*
 *  Status Register Bits
 */

#define KBD_STAT_OBF        0x01    /* Keyboard output buffer full */
#define KBD_STAT_IBF        0x02    /* Keyboard input buffer full */
#define KBD_STAT_SELFTEST   0x04    /* Self test successful */
#define KBD_STAT_CMD        0x08    /* Last write was a command write (0=data) */
#define KBD_STAT_UNLOCKED   0x10    /* Zero if keyboard locked */
#define KBD_STAT_MOUSE_OBF  0x20    /* Mouse output buffer full */
#define KBD_STAT_GTO        0x40    /* General receive/xmit timeout */
#define KBD_STAT_PERR       0x80    /* Parity error */

#define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF)

/*
 *  Controller Mode Register Bits
 */

#define KBD_MODE_KBD_INT    0x01    /* Keyboard data generate IRQ1 */
#define KBD_MODE_MOUSE_INT  0x02    /* Mouse data generate IRQ12 */
#define KBD_MODE_SYS        0x04    /* The system flag (?) */
#define KBD_MODE_NO_KEYLOCK 0x08    /* The keylock doesn't affect the keyboard if set */
#define KBD_MODE_DISABLE_KBD    0x10    /* Disable keyboard interface */
#define KBD_MODE_DISABLE_MOUSE  0x20    /* Disable mouse interface */
#define KBD_MODE_KCC        0x40    /* Scan code conversion to PC format */
#define KBD_MODE_RFU        0x80

/*
 *  Mouse Commands
 */

#define AUX_SET_RES     0xE8    /* Set resolution */
#define AUX_SET_SCALE11     0xE6    /* Set 1:1 scaling */
#define AUX_SET_SCALE21     0xE7    /* Set 2:1 scaling */
#define AUX_GET_SCALE       0xE9    /* Get scaling factor */
#define AUX_SET_STREAM      0xEA    /* Set stream mode */
#define AUX_SET_SAMPLE      0xF3    /* Set sample rate */
#define AUX_ENABLE_DEV      0xF4    /* Enable aux device */
#define AUX_DISABLE_DEV     0xF5    /* Disable aux device */
#define AUX_RESET       0xFF    /* Reset aux device */
#define AUX_ACK         0xFA    /* Command byte ACK. */

#define AUX_BUF_SIZE        512 /* This might be better divisible by
                       three to make overruns stay in sync
                       but then the read function would need
                       a lock etc - ick */

struct aux_queue {
    unsigned long head;
    unsigned long tail;
    struct wait_queue *proc_list;
    struct fasync_struct *fasync;
    unsigned char buf[AUX_BUF_SIZE];
};

/* How to access the keyboard macros on this platform.  */
#define kbd_read_input() inb(KBD_DATA_REG)
#define kbd_read_status() inb(KBD_STATUS_REG)
#define kbd_write_output(val) outb(val, KBD_DATA_REG)
#define kbd_write_command(val) outb(val, KBD_CNTL_REG)

/*
 * Machine specific bits for the PS/2 driver
 */

#define AUX_IRQ 12