79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
#include "floppy.h"
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/* State management variables. */
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EXTERN u16_t f_busy;
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EXTERN int motor_status;
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EXTERN unsigned f_drive;
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EXTERN int last_was_write;
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#define BSY_IO 1 /* busy doing I/O */
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/* State management helpers. */
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#define IS_REQUEST_PENDING(b) ((b) == BSY_IO)
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#define IS_READ_PENDING(b, c) \
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(IS_REQUEST_PENDING((b)) && (c) == DEV_GATHER_S)
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#define IS_WRITE_PENDING(b, c) \
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(IS_REQUEST_PENDING((b)) && (c) == DEV_SCATTER_S)
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#define IS_MOTOR_RUNNING(s, d) ((s) & (1 << (d)))
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/* Custom states definition. */
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#define FL_STATE_MOTOR_OFF (SEF_LU_STATE_CUSTOM_BASE + 0)
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#define FL_STATE_IS_CUSTOM(s) ((s) == FL_STATE_MOTOR_OFF)
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/*===========================================================================*
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* sef_cb_lu_prepare *
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*===========================================================================*/
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int sef_cb_lu_prepare(int state)
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{
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int is_ready;
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/* Check if we are ready for the target state. */
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is_ready = FALSE;
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switch(state) {
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/* Standard states. */
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case SEF_LU_STATE_REQUEST_FREE:
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case SEF_LU_STATE_PROTOCOL_FREE:
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is_ready = (!IS_REQUEST_PENDING(f_busy));
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break;
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/* Custom states. */
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case FL_STATE_MOTOR_OFF:
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is_ready = (!IS_REQUEST_PENDING(f_busy)
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&& !IS_MOTOR_RUNNING(motor_status, f_drive));
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break;
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}
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/* Tell SEF if we are ready. */
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return is_ready ? OK : ENOTREADY;
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}
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/*===========================================================================*
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* sef_cb_lu_state_isvalid *
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*===========================================================================*/
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int sef_cb_lu_state_isvalid(int state)
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{
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return SEF_LU_STATE_IS_STANDARD(state) || FL_STATE_IS_CUSTOM(state);
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}
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/*===========================================================================*
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* sef_cb_lu_state_dump *
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*===========================================================================*/
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void sef_cb_lu_state_dump(int state)
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{
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sef_lu_dprint("floppy: live update state = %d\n", state);
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sef_lu_dprint("floppy: f_busy = %d\n", f_busy);
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sef_lu_dprint("floppy: motor_status = 0x%02X\n", motor_status);
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sef_lu_dprint("floppy: f_drive = %d\n", f_drive);
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sef_lu_dprint("floppy: last_was_write = %d\n", last_was_write);
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sef_lu_dprint("floppy: SEF_LU_STATE_WORK_FREE(%d) reached = %d\n",
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SEF_LU_STATE_WORK_FREE, TRUE);
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sef_lu_dprint("floppy: SEF_LU_STATE_REQUEST_FREE(%d) reached = %d\n",
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SEF_LU_STATE_REQUEST_FREE, (!IS_REQUEST_PENDING(f_busy)));
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sef_lu_dprint("floppy: SEF_LU_STATE_PROTOCOL_FREE(%d) reached = %d\n",
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SEF_LU_STATE_PROTOCOL_FREE, (!IS_REQUEST_PENDING(f_busy)));
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sef_lu_dprint("floppy: FL_STATE_MOTOR_OFF(%d) reached = %d\n",
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FL_STATE_MOTOR_OFF, (!IS_REQUEST_PENDING(f_busy)
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&& !IS_MOTOR_RUNNING(motor_status, f_drive)));
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}
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