261 lines
6.5 KiB
C
261 lines
6.5 KiB
C
/* $NetBSD: ld_sdmmc.c,v 1.3 2009/05/29 22:27:40 nonaka Exp $ */
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/*
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* Copyright (c) 2008 KIYOHARA Takashi
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ld_sdmmc.c,v 1.3 2009/05/29 22:27:40 nonaka Exp $");
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#include "rnd.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/buf.h>
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#include <sys/bufq.h>
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#include <sys/bus.h>
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#include <sys/callout.h>
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#include <sys/endian.h>
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#include <sys/dkio.h>
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#include <sys/disk.h>
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#include <sys/kthread.h>
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#if NRND > 0
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#include <sys/rnd.h>
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#endif
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#include <uvm/uvm_extern.h>
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#include <dev/ldvar.h>
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#include <dev/sdmmc/sdmmcvar.h>
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#ifdef SDMMC_DEBUG
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#define DPRINTF(s) printf s
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#else
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#define DPRINTF(s) /**/
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#endif
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struct ld_sdmmc_softc;
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struct ld_sdmmc_task {
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struct sdmmc_task task;
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struct ld_sdmmc_softc *task_sc;
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struct buf *task_bp;
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callout_t task_callout;
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};
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struct ld_sdmmc_softc {
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struct ld_softc sc_ld;
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int sc_hwunit;
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struct sdmmc_function *sc_sf;
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struct ld_sdmmc_task sc_task;
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};
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static int ld_sdmmc_match(device_t, cfdata_t, void *);
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static void ld_sdmmc_attach(device_t, device_t, void *);
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static int ld_sdmmc_detach(device_t, int);
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static int ld_sdmmc_dump(struct ld_softc *, void *, int, int);
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static int ld_sdmmc_start(struct ld_softc *, struct buf *);
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static void ld_sdmmc_doattach(void *);
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static void ld_sdmmc_dobio(void *);
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static void ld_sdmmc_timeout(void *);
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CFATTACH_DECL_NEW(ld_sdmmc, sizeof(struct ld_sdmmc_softc),
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ld_sdmmc_match, ld_sdmmc_attach, ld_sdmmc_detach, NULL);
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/* ARGSUSED */
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static int
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ld_sdmmc_match(device_t parent, cfdata_t match, void *aux)
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{
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struct sdmmc_softc *sdmsc = device_private(parent);
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if (ISSET(sdmsc->sc_flags, SMF_MEM_MODE))
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return 1;
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return 0;
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}
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/* ARGSUSED */
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static void
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ld_sdmmc_attach(device_t parent, device_t self, void *aux)
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{
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struct ld_sdmmc_softc *sc = device_private(self);
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struct sdmmc_attach_args *sa = aux;
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struct ld_softc *ld = &sc->sc_ld;
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struct lwp *lwp;
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ld->sc_dv = self;
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aprint_normal("\n");
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aprint_naive("\n");
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callout_init(&sc->sc_task.task_callout, CALLOUT_MPSAFE);
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sc->sc_hwunit = 0; /* always 0? */
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sc->sc_sf = sa->sf;
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ld->sc_flags = LDF_ENABLED;
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ld->sc_secperunit = sc->sc_sf->csd.capacity;
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ld->sc_secsize = sc->sc_sf->csd.sector_size;
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ld->sc_maxxfer = MAXPHYS;
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ld->sc_maxqueuecnt = 1;
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ld->sc_dump = ld_sdmmc_dump;
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ld->sc_start = ld_sdmmc_start;
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/*
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* It is avoided that the error occurs when the card attaches it,
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* when wedge is supported.
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*/
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if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL,
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ld_sdmmc_doattach, sc, &lwp, "%sattach", device_xname(self))) {
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aprint_error_dev(self, "couldn't create thread\n");
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}
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}
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static void
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ld_sdmmc_doattach(void *arg)
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{
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struct ld_sdmmc_softc *sc = (struct ld_sdmmc_softc *)arg;
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struct ld_softc *ld = &sc->sc_ld;
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ldattach(ld);
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kthread_exit(0);
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}
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static int
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ld_sdmmc_detach(device_t dev, int flags)
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{
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struct ld_sdmmc_softc *sc = device_private(dev);
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struct ld_softc *ld = &sc->sc_ld;
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int rv;
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if ((rv = ldbegindetach(ld, flags)) != 0)
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return rv;
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ldenddetach(ld);
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return 0;
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}
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static int
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ld_sdmmc_start(struct ld_softc *ld, struct buf *bp)
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{
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struct ld_sdmmc_softc *sc = device_private(ld->sc_dv);
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struct ld_sdmmc_task *task = &sc->sc_task;
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task->task_sc = sc;
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task->task_bp = bp;
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sdmmc_init_task(&task->task, ld_sdmmc_dobio, task);
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callout_reset(&task->task_callout, hz, ld_sdmmc_timeout, task);
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sdmmc_add_task(sc->sc_sf->sc, &task->task);
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return 0;
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}
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static void
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ld_sdmmc_dobio(void *arg)
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{
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struct ld_sdmmc_task *task = (struct ld_sdmmc_task *)arg;
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struct ld_sdmmc_softc *sc = task->task_sc;
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struct buf *bp = task->task_bp;
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int error, s;
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callout_stop(&task->task_callout);
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/*
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* I/O operation
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*/
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DPRINTF(("%s: I/O operation (dir=%s, blkno=0x%jx, bcnt=0x%x)\n",
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device_xname(sc->sc_ld.sc_dv), bp->b_flags & B_READ ? "IN" : "OUT",
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bp->b_rawblkno, bp->b_bcount));
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/* is everything done in terms of blocks? */
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if (bp->b_rawblkno >= sc->sc_sf->csd.capacity) {
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/* trying to read or write past end of device */
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DPRINTF(("%s: blkno exceeds capacity 0x%x\n",
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device_xname(sc->sc_ld.sc_dv), sc->sc_sf->csd.capacity));
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bp->b_error = EIO; /* XXX */
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bp->b_resid = bp->b_bcount;
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lddone(&sc->sc_ld, bp);
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return;
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}
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s = splbio();
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if (bp->b_flags & B_READ)
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error = sdmmc_mem_read_block(sc->sc_sf, bp->b_rawblkno,
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bp->b_data, bp->b_bcount);
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else
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error = sdmmc_mem_write_block(sc->sc_sf, bp->b_rawblkno,
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bp->b_data, bp->b_bcount);
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if (error) {
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DPRINTF(("%s: error %d\n", device_xname(sc->sc_ld.sc_dv),
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error));
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bp->b_error = EIO; /* XXXX */
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bp->b_resid = bp->b_bcount;
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} else {
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bp->b_resid = 0;
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}
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splx(s);
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lddone(&sc->sc_ld, bp);
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}
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static void
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ld_sdmmc_timeout(void *arg)
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{
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struct ld_sdmmc_task *task = (struct ld_sdmmc_task *)arg;
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struct ld_sdmmc_softc *sc = task->task_sc;
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struct buf *bp = task->task_bp;
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int s;
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s = splbio();
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if (!sdmmc_task_pending(&task->task)) {
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splx(s);
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return;
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}
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bp->b_error = EIO; /* XXXX */
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bp->b_resid = bp->b_bcount;
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sdmmc_del_task(&task->task);
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splx(s);
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lddone(&sc->sc_ld, bp);
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}
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static int
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ld_sdmmc_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
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{
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struct ld_sdmmc_softc *sc = device_private(ld->sc_dv);
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return sdmmc_mem_write_block(sc->sc_sf, blkno, data,
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blkcnt * ld->sc_secsize);
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}
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