460 lines
12 KiB
C
460 lines
12 KiB
C
/*-
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* Copyright (c) 2013 Ilya Bakulin. 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 WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/module.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/sysctl.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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#include <cam/cam_debug.h>
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#include <cam/cam_sim.h>
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#include <cam/cam_xpt_sim.h>
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#include <cam/scsi/scsi_all.h>
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static int is_sdio_mode = 1;
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struct mmcnull_softc {
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device_t dev;
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struct mtx sc_mtx;
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struct cam_devq *devq;
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struct cam_sim *sim;
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struct cam_path *path;
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struct callout tick;
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union ccb *cur_ccb;
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};
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static void mmcnull_identify(driver_t *, device_t);
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static int mmcnull_probe(device_t);
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static int mmcnull_attach(device_t);
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static int mmcnull_detach(device_t);
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static void mmcnull_action_sd(struct cam_sim *, union ccb *);
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static void mmcnull_action_sdio(struct cam_sim *, union ccb *);
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static void mmcnull_intr_sd(void *xsc);
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static void mmcnull_intr_sdio(void *xsc);
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static void mmcnull_poll(struct cam_sim *);
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static void
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mmcnull_identify(driver_t *driver, device_t parent)
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{
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device_t child;
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if (resource_disabled("mmcnull", 0))
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return;
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if (device_get_unit(parent) != 0)
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return;
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/* Avoid duplicates. */
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if (device_find_child(parent, "mmcnull", -1))
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return;
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child = BUS_ADD_CHILD(parent, 20, "mmcnull", 0);
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if (child == NULL) {
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device_printf(parent, "add MMCNULL child failed\n");
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return;
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}
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}
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static int
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mmcnull_probe(device_t dev)
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{
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device_set_desc(dev, "Emulated MMC controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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mmcnull_attach(device_t dev)
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{
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struct mmcnull_softc *sc;
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sim_action_func action_func;
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sc = device_get_softc(dev);
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sc->dev = dev;
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mtx_init(&sc->sc_mtx, "mmcnullmtx", NULL, MTX_DEF);
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if ((sc->devq = cam_simq_alloc(1)) == NULL)
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return (ENOMEM);
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if (is_sdio_mode)
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action_func = mmcnull_action_sdio;
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else
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action_func = mmcnull_action_sd;
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sc->sim = cam_sim_alloc(action_func, mmcnull_poll, "mmcnull", sc,
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device_get_unit(dev), &sc->sc_mtx, 1, 1,
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sc->devq);
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if (sc->sim == NULL) {
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cam_simq_free(sc->devq);
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device_printf(dev, "cannot allocate CAM SIM\n");
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return (EINVAL);
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}
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mtx_lock(&sc->sc_mtx);
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if (xpt_bus_register(sc->sim, dev, 0) != 0) {
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device_printf(dev,
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"cannot register SCSI pass-through bus\n");
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cam_sim_free(sc->sim, FALSE);
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cam_simq_free(sc->devq);
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mtx_unlock(&sc->sc_mtx);
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return (EINVAL);
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}
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mtx_unlock(&sc->sc_mtx);
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callout_init_mtx(&sc->tick, &sc->sc_mtx, 0); /* Callout to emulate interrupts */
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device_printf(dev, "attached OK\n");
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return (0);
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}
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static int
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mmcnull_detach(device_t dev)
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{
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struct mmcnull_softc *sc;
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sc = device_get_softc(dev);
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if (sc == NULL)
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return (EINVAL);
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if (sc->sim != NULL) {
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mtx_lock(&sc->sc_mtx);
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xpt_bus_deregister(cam_sim_path(sc->sim));
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cam_sim_free(sc->sim, FALSE);
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mtx_unlock(&sc->sc_mtx);
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}
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if (sc->devq != NULL)
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cam_simq_free(sc->devq);
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callout_drain(&sc->tick);
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mtx_destroy(&sc->sc_mtx);
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device_printf(dev, "detached OK\n");
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return (0);
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}
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/*
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* The interrupt handler
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* This implementation calls it via callout(9)
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* with the mutex already taken
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*/
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static void
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mmcnull_intr_sd(void *xsc) {
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struct mmcnull_softc *sc;
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union ccb *ccb;
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struct ccb_mmcio *mmcio;
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sc = (struct mmcnull_softc *) xsc;
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mtx_assert(&sc->sc_mtx, MA_OWNED);
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ccb = sc->cur_ccb;
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mmcio = &ccb->mmcio;
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device_printf(sc->dev, "mmcnull_intr: MMC command = %d\n",
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mmcio->cmd.opcode);
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switch (mmcio->cmd.opcode) {
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case MMC_GO_IDLE_STATE:
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device_printf(sc->dev, "Reset device\n");
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break;
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case SD_SEND_IF_COND:
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mmcio->cmd.resp[0] = 0x1AA; // To match mmc_xpt expectations :-)
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break;
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case MMC_APP_CMD:
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mmcio->cmd.resp[0] = R1_APP_CMD;
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break;
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case SD_SEND_RELATIVE_ADDR:
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case MMC_SELECT_CARD:
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mmcio->cmd.resp[0] = 0x1 << 16;
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break;
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case ACMD_SD_SEND_OP_COND:
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mmcio->cmd.resp[0] = 0xc0ff8000;
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mmcio->cmd.resp[0] |= MMC_OCR_CARD_BUSY;
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break;
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case MMC_ALL_SEND_CID:
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/* Note: this is a real CID from Wandboard int mmc */
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mmcio->cmd.resp[0] = 0x1b534d30;
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mmcio->cmd.resp[1] = 0x30303030;
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mmcio->cmd.resp[2] = 0x10842806;
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mmcio->cmd.resp[3] = 0x5700e900;
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break;
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case MMC_SEND_CSD:
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/* Note: this is a real CSD from Wandboard int mmc */
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mmcio->cmd.resp[0] = 0x400e0032;
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mmcio->cmd.resp[1] = 0x5b590000;
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mmcio->cmd.resp[2] = 0x751f7f80;
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mmcio->cmd.resp[3] = 0x0a404000;
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break;
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case MMC_READ_SINGLE_BLOCK:
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case MMC_READ_MULTIPLE_BLOCK:
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strcpy(mmcio->cmd.data->data, "WTF?!");
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break;
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default:
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device_printf(sc->dev, "mmcnull_intr_sd: unknown command\n");
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mmcio->cmd.error = 1;
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}
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ccb->ccb_h.status = CAM_REQ_CMP;
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sc->cur_ccb = NULL;
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xpt_done(ccb);
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}
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static void
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mmcnull_intr_sdio_newintr(void *xsc) {
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struct mmcnull_softc *sc;
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struct cam_path *dpath;
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sc = (struct mmcnull_softc *) xsc;
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mtx_assert(&sc->sc_mtx, MA_OWNED);
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device_printf(sc->dev, "mmcnull_intr_sdio_newintr()\n");
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/* Our path */
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if (xpt_create_path(&dpath, NULL, cam_sim_path(sc->sim), 0, 0) != CAM_REQ_CMP) {
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device_printf(sc->dev, "mmcnull_intr_sdio_newintr(): cannot create path\n");
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return;
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}
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xpt_async(AC_UNIT_ATTENTION, dpath, NULL);
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xpt_free_path(dpath);
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}
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static void
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mmcnull_intr_sdio(void *xsc) {
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struct mmcnull_softc *sc;
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union ccb *ccb;
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struct ccb_mmcio *mmcio;
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sc = (struct mmcnull_softc *) xsc;
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mtx_assert(&sc->sc_mtx, MA_OWNED);
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ccb = sc->cur_ccb;
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mmcio = &ccb->mmcio;
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device_printf(sc->dev, "mmcnull_intr: MMC command = %d\n",
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mmcio->cmd.opcode);
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switch (mmcio->cmd.opcode) {
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case MMC_GO_IDLE_STATE:
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device_printf(sc->dev, "Reset device\n");
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break;
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case SD_SEND_IF_COND:
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mmcio->cmd.resp[0] = 0x1AA; // To match mmc_xpt expectations :-)
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break;
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case MMC_APP_CMD:
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mmcio->cmd.resp[0] = R1_APP_CMD;
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break;
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case IO_SEND_OP_COND:
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mmcio->cmd.resp[0] = 0x12345678;
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mmcio->cmd.resp[0] |= ~ R4_IO_MEM_PRESENT;
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break;
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case SD_SEND_RELATIVE_ADDR:
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case MMC_SELECT_CARD:
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mmcio->cmd.resp[0] = 0x1 << 16;
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break;
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case ACMD_SD_SEND_OP_COND:
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/* TODO: steal valid OCR from somewhere :-) */
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mmcio->cmd.resp[0] = 0x123;
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mmcio->cmd.resp[0] |= MMC_OCR_CARD_BUSY;
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break;
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case MMC_ALL_SEND_CID:
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mmcio->cmd.resp[0] = 0x1234;
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mmcio->cmd.resp[1] = 0x5678;
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mmcio->cmd.resp[2] = 0x9ABC;
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mmcio->cmd.resp[3] = 0xDEF0;
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break;
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case MMC_READ_SINGLE_BLOCK:
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case MMC_READ_MULTIPLE_BLOCK:
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strcpy(mmcio->cmd.data->data, "WTF?!");
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break;
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case SD_IO_RW_DIRECT:
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device_printf(sc->dev, "Scheduling interrupt generation...\n");
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callout_reset(&sc->tick, hz / 10, mmcnull_intr_sdio_newintr, sc);
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break;
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default:
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device_printf(sc->dev, "mmcnull_intr_sdio: unknown command\n");
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}
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ccb->ccb_h.status = CAM_REQ_CMP;
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sc->cur_ccb = NULL;
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xpt_done(ccb);
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}
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/*
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* This is a MMC IO handler
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* It extracts MMC command from CCB and sends it
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* to the h/w
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*/
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static void
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mmcnull_handle_mmcio(struct cam_sim *sim, union ccb *ccb)
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{
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struct mmcnull_softc *sc;
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struct ccb_mmcio *mmcio;
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sc = cam_sim_softc(sim);
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mmcio = &ccb->mmcio;
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ccb->ccb_h.status = CAM_REQ_INPROG;
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sc->cur_ccb = ccb;
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/* Real h/w will wait for the interrupt */
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if (is_sdio_mode)
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callout_reset(&sc->tick, hz / 10, mmcnull_intr_sdio, sc);
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else
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callout_reset(&sc->tick, hz / 10, mmcnull_intr_sd, sc);
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}
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static void
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mmcnull_action_sd(struct cam_sim *sim, union ccb *ccb)
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{
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struct mmcnull_softc *sc;
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sc = cam_sim_softc(sim);
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if (sc == NULL) {
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ccb->ccb_h.status = CAM_SEL_TIMEOUT;
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xpt_done(ccb);
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return;
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}
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mtx_assert(&sc->sc_mtx, MA_OWNED);
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device_printf(sc->dev, "action: func_code %0x\n", ccb->ccb_h.func_code);
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switch (ccb->ccb_h.func_code) {
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case XPT_PATH_INQ:
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{
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struct ccb_pathinq *cpi;
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cpi = &ccb->cpi;
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cpi->version_num = 1;
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cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE | PI_WIDE_16;
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cpi->target_sprt = 0;
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cpi->hba_misc = PIM_NOBUSRESET | PIM_SEQSCAN;
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cpi->hba_eng_cnt = 0;
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cpi->max_target = 0;
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cpi->max_lun = 0;
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cpi->initiator_id = 1;
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strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
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strncpy(cpi->hba_vid, "FreeBSD Foundation", HBA_IDLEN);
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strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
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cpi->unit_number = cam_sim_unit(sim);
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cpi->bus_id = cam_sim_bus(sim);
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cpi->base_transfer_speed = 100; /* XXX WTF? */
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cpi->protocol = PROTO_MMCSD;
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cpi->protocol_version = SCSI_REV_0;
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cpi->transport = XPORT_MMCSD;
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cpi->transport_version = 0;
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cpi->ccb_h.status = CAM_REQ_CMP;
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break;
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}
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case XPT_GET_TRAN_SETTINGS:
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{
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struct ccb_trans_settings *cts = &ccb->cts;
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struct ccb_trans_settings_mmc *mcts;
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mcts = &ccb->cts.proto_specific.mmc;
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device_printf(sc->dev, "Got XPT_GET_TRAN_SETTINGS\n");
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cts->protocol = PROTO_MMCSD;
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cts->protocol_version = 0;
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cts->transport = XPORT_MMCSD;
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cts->transport_version = 0;
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cts->xport_specific.valid = 0;
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mcts->host_f_max = 12000000;
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mcts->host_f_min = 200000;
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mcts->host_ocr = 1; /* Fix this */
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ccb->ccb_h.status = CAM_REQ_CMP;
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break;
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}
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case XPT_SET_TRAN_SETTINGS:
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device_printf(sc->dev, "Got XPT_SET_TRAN_SETTINGS, should update IOS...\n");
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ccb->ccb_h.status = CAM_REQ_CMP;
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break;
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case XPT_RESET_BUS:
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device_printf(sc->dev, "Got XPT_RESET_BUS, ACK it...\n");
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ccb->ccb_h.status = CAM_REQ_CMP;
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break;
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case XPT_MMC_IO:
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/*
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* Here is the HW-dependent part of
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* sending the command to the underlying h/w
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* At some point in the future an interrupt comes.
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* Then the request will be marked as completed.
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*/
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device_printf(sc->dev, "Got XPT_MMC_IO\n");
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mmcnull_handle_mmcio(sim, ccb);
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return;
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break;
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case XPT_RESET_DEV:
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/* This is sent by `camcontrol reset`*/
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device_printf(sc->dev, "Got XPT_RESET_DEV\n");
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ccb->ccb_h.status = CAM_REQ_CMP;
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break;
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default:
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device_printf(sc->dev, "Func code %d is unknown\n", ccb->ccb_h.func_code);
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ccb->ccb_h.status = CAM_REQ_INVALID;
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break;
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}
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xpt_done(ccb);
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return;
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}
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static void
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mmcnull_action_sdio(struct cam_sim *sim, union ccb *ccb) {
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mmcnull_action_sd(sim, ccb);
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}
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static void
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mmcnull_poll(struct cam_sim *sim)
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{
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return;
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}
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static device_method_t mmcnull_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, mmcnull_identify),
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DEVMETHOD(device_probe, mmcnull_probe),
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DEVMETHOD(device_attach, mmcnull_attach),
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DEVMETHOD(device_detach, mmcnull_detach),
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DEVMETHOD_END
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};
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static driver_t mmcnull_driver = {
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"mmcnull", mmcnull_methods, sizeof(struct mmcnull_softc)
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};
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DRIVER_MODULE(mmcnull, isa, mmcnull_driver, 0, 0);
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