159a4659df
In particular: - Don't leave resources allocated in the probe routine. Allocate them during probe and release them. Probe's job is to identify devices only. - Don't abuse the ivars pointer.. (!). Create real ivars and use the proper access system. (the bus_read_ivar method) - Don't add the children until attach() has successfully grabbed the hardware, otherwise there are potential leaks if attach fails.
121 lines
4.1 KiB
C
121 lines
4.1 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
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* $FreeBSD$
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*
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*/
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enum fdc_type
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{
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FDC_NE765, FDC_I82077, FDC_NE72065, FDC_UNKNOWN = -1
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};
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/***********************************************************************\
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* Per controller structure. *
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\***********************************************************************/
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struct fdc_data
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{
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int fdcu; /* our unit number */
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int dmachan;
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int flags;
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#define FDC_ATTACHED 0x01
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#define FDC_HASFTAPE 0x02
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#define FDC_TAPE_BUSY 0x04
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#define FDC_STAT_VALID 0x08
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#define FDC_HAS_FIFO 0x10
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#define FDC_NEEDS_RESET 0x20
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#ifdef FDC_YE
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#define FDC_PCMCIA 0x40
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#define FDC_UNLOADED 0x80
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#endif
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#define FDC_ISPNP 0x100
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struct fd_data *fd;
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int fdu; /* the active drive */
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int state;
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int retry;
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int fdout; /* mirror of the w/o digital output reg */
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u_int status[7]; /* copy of the registers */
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enum fdc_type fdct; /* chip version of FDC */
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int fdc_errs; /* number of logged errors */
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struct buf_queue_head head;
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struct buf *bp; /* active buffer */
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struct resource *res_ioport, *res_ctl, *res_irq, *res_drq;
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int rid_ioport, rid_ctl, rid_irq, rid_drq;
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int port_off;
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bus_space_tag_t portt;
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bus_space_handle_t porth;
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bus_space_tag_t ctlt;
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bus_space_handle_t ctlh;
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void *fdc_intr;
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struct device *fdc_dev;
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int fdc_ispnp;
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};
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/***********************************************************************\
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* Throughout this file the following conventions will be used: *
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* fd is a pointer to the fd_data struct for the drive in question *
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* fdc is a pointer to the fdc_data struct for the controller *
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* fdu is the floppy drive unit number *
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* fdcu is the floppy controller unit number *
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* fdsu is the floppy drive unit number on that controller. (sub-unit) *
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\***********************************************************************/
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typedef int fdu_t;
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typedef int fdcu_t;
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typedef int fdsu_t;
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typedef struct fd_data *fd_p;
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typedef struct fdc_data *fdc_p;
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typedef enum fdc_type fdc_t;
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#define FDUNIT(s) (((s)>>6)&03)
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#define FDTYPE(s) ((s)&077)
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/*
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* fdc maintains a set (1!) of ivars per child of each controller.
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*/
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enum fdc_device_ivars {
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FDC_IVAR_FDUNIT,
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};
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/*
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* Simple access macros for the ivars.
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*/
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#define FDC_ACCESSOR(A, B, T) \
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static __inline T fdc_get_ ## A(device_t dev) \
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{ \
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uintptr_t v; \
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BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \
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return (T) v; \
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}
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FDC_ACCESSOR(fdunit, FDUNIT, int)
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