source: mainline/uspace/drv/bus/usb/uhci/hc.h

/*
 * Copyright (c) 2025 Jiri Svoboda
 * Copyright (c) 2011 Jan Vesely
 * Copyright (c) 2018 Ondrej Hlavaty
 * 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 drvusbuhci
 * @{
 */
/** @file
 * @brief UHCI host controller driver structure
 */

#ifndef DRV_UHCI_HC_H
#define DRV_UHCI_HC_H

#include <device/hw_res_parsed.h>
#include <fibril.h>
#include <macros.h>
#include <member.h>
#include <stdbool.h>
#include <ddi.h>
#include <usb/host/hcd.h>
#include <usb/host/usb2_bus.h>
#include <usb/host/usb_transfer_batch.h>

#include "uhci_rh.h"
#include "transfer_list.h"
#include "hw_struct/link_pointer.h"

/** UHCI I/O registers layout */
typedef struct uhci_regs {
        /** Command register, controls HC behaviour */
        ioport16_t usbcmd;
#define UHCI_CMD_MAX_PACKET (1 << 7)
#define UHCI_CMD_CONFIGURE  (1 << 6)
#define UHCI_CMD_DEBUG  (1 << 5)
#define UHCI_CMD_FORCE_GLOBAL_RESUME  (1 << 4)
#define UHCI_CMD_FORCE_GLOBAL_SUSPEND  (1 << 3)
#define UHCI_CMD_GLOBAL_RESET  (1 << 2)
#define UHCI_CMD_HCRESET  (1 << 1)
#define UHCI_CMD_RUN_STOP  (1 << 0)

        /** Status register, 1 means interrupt is asserted (if enabled) */
        ioport16_t usbsts;
#define UHCI_STATUS_HALTED (1 << 5)
#define UHCI_STATUS_PROCESS_ERROR (1 << 4)
#define UHCI_STATUS_SYSTEM_ERROR (1 << 3)
#define UHCI_STATUS_RESUME (1 << 2)
#define UHCI_STATUS_ERROR_INTERRUPT (1 << 1)
#define UHCI_STATUS_INTERRUPT (1 << 0)
#define UHCI_STATUS_NM_INTERRUPTS \
    (UHCI_STATUS_PROCESS_ERROR | UHCI_STATUS_SYSTEM_ERROR)

        /** Interrupt enabled registers */
        ioport16_t usbintr;
#define UHCI_INTR_SHORT_PACKET (1 << 3)
#define UHCI_INTR_COMPLETE (1 << 2)
#define UHCI_INTR_RESUME (1 << 1)
#define UHCI_INTR_CRC (1 << 0)

        /** Register stores frame number used in SOF packet */
        ioport16_t frnum;

        /** Pointer(physical) to the Frame List */
        ioport32_t flbaseadd;

        /** SOF modification to match external timers */
        ioport8_t sofmod;

        PADD8(3);
        ioport16_t ports[];
} uhci_regs_t;

#define UHCI_FRAME_LIST_COUNT 1024
#define UHCI_DEBUGER_TIMEOUT 5000000
#define UHCI_ALLOWED_HW_FAIL 5

/** Main UHCI driver structure */
typedef struct hc {
        /* Common hc_device header */
        hc_device_t base;

        uhci_rh_t rh;
        bus_t bus;
        usb2_bus_helper_t bus_helper;

        /** Addresses of I/O registers */
        uhci_regs_t *registers;

        /** Frame List contains 1024 link pointers */
        link_pointer_t *frame_list;

        /** List and queue of interrupt transfers */
        transfer_list_t transfers_interrupt;
        /** List and queue of low speed control transfers */
        transfer_list_t transfers_control_slow;
        /** List and queue of full speed bulk transfers */
        transfer_list_t transfers_bulk_full;
        /** List and queue of full speed control transfers */
        transfer_list_t transfers_control_full;

        /** Pointer table to the above lists, helps during scheduling */
        transfer_list_t *transfers[2][4];

        /**
         * Guard for the pending list. Can be locked under EP guard, but not
         * vice versa.
         */
        fibril_mutex_t guard;
        /** List of endpoints with a transfer scheduled */
        list_t pending_endpoints;

        /** Number of hw failures detected. */
        unsigned hw_failures;
} hc_t;

typedef struct uhci_endpoint {
        endpoint_t base;

        bool toggle;
} uhci_endpoint_t;

static inline hc_t *hcd_to_hc(hc_device_t *hcd)
{
        assert(hcd);
        return (hc_t *) hcd;
}

static inline hc_t *bus_to_hc(bus_t *bus)
{
        assert(bus);
        return member_to_inst(bus, hc_t, bus);
}

int hc_unschedule_batch(usb_transfer_batch_t *);

extern errno_t hc_add(hc_device_t *, const hw_res_list_parsed_t *);
extern errno_t hc_gen_irq_code(irq_code_t *, hc_device_t *, const hw_res_list_parsed_t *, int *);
extern errno_t hc_start(hc_device_t *);
extern errno_t hc_setup_roothub(hc_device_t *);
extern errno_t hc_gone(hc_device_t *);
extern errno_t hc_quiesce(hc_device_t *);

#endif

/**
 * @}
 */