source: mainline/uspace/drv/block/pc-floppy/pc-floppy.h@ 07039850

/*
 * Copyright (c) 2025 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup pc-floppy
 * @{
 */
/** @file PC floppy disk driver
 */

#ifndef PC_FLOPPY_H
#define PC_FLOPPY_H

#include <bd_srv.h>
#include <ddf/driver.h>
#include <fibril_synch.h>
#include <stdbool.h>
#include <stdint.h>
#include "pc-floppy_hw.h"

#define NAME "pc-floppy"

/** PC floppy controller hardware resources */
typedef struct {
        /** I/O registers */
        uintptr_t regs;
        /** IRQ */
        int irq;
        /** DMA channel */
        int dma;
} pc_fdc_hwres_t;

/** PC floppy disk controller */
typedef struct pc_fdc {
        /** DDF device */
        ddf_dev_t *dev;
        /** I/O base address of the registers */
        uintptr_t regs_physical;

        /** Command registers */
        pc_fdc_regs_t *regs;
        /** IRQ (-1 if not used) */
        int irq;
        /** DMA (-1 if not used) */
        int dma;
        /** IRQ handle */
        cap_irq_handle_t ihandle;

        /** DMA buffer */
        void *dma_buf;
        /** DMA buffer physical address */
        uintptr_t dma_buf_pa;
        /** DMA buffer size */
        size_t dma_buf_size;

        /** Synchronize controller access */
        fibril_mutex_t lock;

        struct pc_fdc_drive *drive[2];
} pc_fdc_t;

/** PC floppy drive */
typedef struct pc_fdc_drive {
        pc_fdc_t *fdc;
        ddf_fun_t *fun;
        void *charg;
        size_t sec_size;
        unsigned cylinders;
        unsigned heads;
        unsigned sectors;
        bd_srvs_t bds;
} pc_fdc_drive_t;

extern errno_t pc_fdc_create(ddf_dev_t *, pc_fdc_hwres_t *, pc_fdc_t **);
extern void pc_fdc_quiesce(pc_fdc_t *);
extern errno_t pc_fdc_destroy(pc_fdc_t *);

#endif

/** @}
 */