/* $OpenBSD: wdc.c,v 1.8 1999/08/05 00:12:09 niklas Exp $ */ /* $NetBSD: wdc.c,v 1.68 1999/06/23 19:00:17 bouyer Exp $ */ /* * Copyright (c) 1998 Manuel Bouyer. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Manuel Bouyer. * 4. 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. */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum, by Onno van der Linden and by Manuel Bouyer. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /* * CODE UNTESTED IN THE CURRENT REVISION: * */ #ifndef WDCDEBUG #define WDCDEBUG #endif /* WDCDEBUG */ #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __BUS_SPACE_HAS_STREAM_METHODS #define bus_space_write_multi_stream_2 bus_space_write_multi_2 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ #include #include #include #include #include "atapiscsi.h" #define WDCDELAY 100 /* 100 microseconds */ #define WDCNDELAY_RST (WDC_RESET_WAIT * 1000 / WDCDELAY) #if 0 /* If you enable this, it will report any delays more than WDCDELAY * N long. */ #define WDCNDELAY_DEBUG 50 #endif LIST_HEAD(xfer_free_list, wdc_xfer) xfer_free_list; static void __wdcerror __P((struct channel_softc*, char *)); static int __wdcwait_reset __P((struct channel_softc *, int)); void __wdccommand_done __P((struct channel_softc *, struct wdc_xfer *)); void __wdccommand_start __P((struct channel_softc *, struct wdc_xfer *)); int __wdccommand_intr __P((struct channel_softc *, struct wdc_xfer *, int)); int wdprint __P((void *, const char *)); #define DEBUG_INTR 0x01 #define DEBUG_XFERS 0x02 #define DEBUG_STATUS 0x04 #define DEBUG_FUNCS 0x08 #define DEBUG_PROBE 0x10 #ifdef WDCDEBUG int wdcdebug_mask = 0; int wdc_nxfer = 0; #define WDCDEBUG_PRINT(args, level) if (wdcdebug_mask & (level)) printf args #else #define WDCDEBUG_PRINT(args, level) #endif int wdprint(aux, pnp) void *aux; const char *pnp; { struct ata_atapi_attach *aa_link = aux; if (pnp) printf("drive at %s", pnp); printf(" channel %d drive %d", aa_link->aa_channel, aa_link->aa_drv_data->drive); return (UNCONF); } int atapi_print(aux, pnp) void *aux; const char *pnp; { struct ata_atapi_attach *aa_link = aux; if (pnp) printf("atapibus at %s", pnp); printf(" channel %d", aa_link->aa_channel); return (UNCONF); } void wdc_disable_intr(chp) struct channel_softc *chp; { bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_IDS); } void wdc_enable_intr(chp) struct channel_softc *chp; { bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); } int wdc_select_drive(chp, drive, howlong) struct channel_softc *chp; int drive; int howlong; { if (wait_for_unbusy(chp, howlong)) { return -1; } bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | (drive << 4)); delay(1); if (wdcwait(chp, WDCS_DRQ, 0, howlong)) { return -1; } return 0; } /* Test to see controller with at last one attached drive is there. * Returns a bit for each possible drive found (0x01 for drive 0, * 0x02 for drive 1). * Logic: * - If a status register is at 0xff, assume there is no drive here * (ISA has pull-up resistors). If no drive at all -> return. * - reset the controller, wait for it to complete (may take up to 31s !). * If timeout -> return. * - test ATA/ATAPI signatures. If at last one drive found -> return. * - try an ATA command on the master. */ int wdcprobe(chp) struct channel_softc *chp; { u_int8_t st0, st1, sc, sn, cl, ch; u_int8_t ret_value = 0x03; u_int8_t drive; /* * Sanity check to see if the wdc channel responds at all. */ if (chp->wdc == NULL || (chp->wdc->cap & WDC_CAPABILITY_NO_EXTRA_RESETS) == 0) { bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM); delay(10); st0 = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_status); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | 0x10); delay(10); st1 = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_status); WDCDEBUG_PRINT(("%s:%d: before reset, st0=0x%x, st1=0x%x\n", chp->wdc ? chp->wdc->sc_dev.dv_xname : "wdcprobe", chp->channel, st0, st1), DEBUG_PROBE); if (st0 == 0xff) ret_value &= ~0x01; if (st1 == 0xff) ret_value &= ~0x02; if (ret_value == 0) return 0; } /* assert SRST, wait for reset to complete */ bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM); delay(10); bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_RST | WDCTL_IDS); DELAY(1000); bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_IDS); delay(1000); (void) bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_error); bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); delay(10); ret_value = __wdcwait_reset(chp, ret_value); WDCDEBUG_PRINT(("%s:%d: after reset, ret_value=0x%d\n", chp->wdc ? chp->wdc->sc_dev.dv_xname : "wdcprobe", chp->channel, ret_value), DEBUG_PROBE); /* if reset failed, there's nothing here */ if (ret_value == 0) return 0; /* * Test presence of drives. First test register signatures looking for * ATAPI devices. If it's not an ATAPI and reset said there may be * something here assume it's ATA or OLD. Ghost will be killed later in * attach routine. */ for (drive = 0; drive < 2; drive++) { if ((ret_value & (0x01 << drive)) == 0) continue; bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | (drive << 4)); delay(10); /* Save registers contents */ sc = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_seccnt); sn = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_sector); cl = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_lo); ch = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_hi); WDCDEBUG_PRINT(("%s:%d:%d: after reset, sc=0x%x sn=0x%x " "cl=0x%x ch=0x%x\n", chp->wdc ? chp->wdc->sc_dev.dv_xname : "wdcprobe", chp->channel, drive, sc, sn, cl, ch), DEBUG_PROBE); /* * sc is supposted to be 0x1 for ATAPI but at last one drive * set it to 0x0 - or maybe it's the controller. */ if ((sc == 0x00 || sc == 0x01) && sn == 0x01 && cl == 0x14 && ch == 0xeb) { chp->ch_drive[drive].drive_flags |= DRIVE_ATAPI; } else { chp->ch_drive[drive].drive_flags |= DRIVE_ATA; if (chp->wdc == NULL || (chp->wdc->cap & WDC_CAPABILITY_PREATA) != 0) chp->ch_drive[drive].drive_flags |= DRIVE_OLD; } } return (ret_value); } void wdcattach(chp) struct channel_softc *chp; { int channel_flags, ctrl_flags, i; #ifndef __OpenBSD__ int error; #endif struct ata_atapi_attach aa_link; struct ataparams params; static int inited = 0; #ifndef __OpenBSD__ if ((error = wdc_addref(chp)) != 0) { printf("%s: unable to enable controller\n", chp->wdc->sc_dev.dv_xname); return; } #endif if (wdcprobe(chp) == 0) { /* If no drives, abort attach here. */ #ifndef __OpenBSD__ wdc_delref(chp); #endif return; } /* init list only once */ if (inited == 0) { LIST_INIT(&xfer_free_list); inited++; } TAILQ_INIT(&chp->ch_queue->sc_xfer); for (i = 0; i < 2; i++) { chp->ch_drive[i].chnl_softc = chp; chp->ch_drive[i].drive = i; /* If controller can't do 16bit flag the drives as 32bit */ if ((chp->wdc->cap & (WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32)) == WDC_CAPABILITY_DATA32) chp->ch_drive[i].drive_flags |= DRIVE_CAP32; if ((chp->ch_drive[i].drive_flags & DRIVE) == 0) continue; /* Issue a IDENTIFY command, to try to detect slave ghost */ if (ata_get_params(&chp->ch_drive[i], AT_POLL, ¶ms) == CMD_OK) { /* If IDENTIFY succeded, this is not an OLD ctrl */ chp->ch_drive[0].drive_flags &= ~DRIVE_OLD; chp->ch_drive[1].drive_flags &= ~DRIVE_OLD; } else { chp->ch_drive[i].drive_flags &= ~(DRIVE_ATA | DRIVE_ATAPI); WDCDEBUG_PRINT(("%s:%d:%d: IDENTIFY failed\n", chp->wdc->sc_dev.dv_xname, chp->channel, i), DEBUG_PROBE); if ((chp->ch_drive[i].drive_flags & DRIVE_OLD) == 0) continue; /* * Pre-ATA drive ? * Test registers writability (Error register not * writable, but cyllo is), then try an ATA command. */ bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | (i << 4)); delay(10); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_error, 0x58); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_lo, 0xa5); if (bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_error == 0x58) || bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_lo) != 0xa5) { WDCDEBUG_PRINT(("%s:%d:%d: register " "writability failed\n", chp->wdc->sc_dev.dv_xname, chp->channel, i), DEBUG_PROBE); chp->ch_drive[i].drive_flags &= ~DRIVE_OLD; } bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | (i << 4)); delay(100); if (wait_for_ready(chp, 10000) != 0) { WDCDEBUG_PRINT(("%s:%d:%d: not ready\n", chp->wdc->sc_dev.dv_xname, chp->channel, i), DEBUG_PROBE); chp->ch_drive[i].drive_flags &= ~DRIVE_OLD; continue; } bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_command, WDCC_RECAL); if (wait_for_ready(chp, 10000) != 0) { WDCDEBUG_PRINT(("%s:%d:%d: WDCC_RECAL failed\n", chp->wdc->sc_dev.dv_xname, chp->channel, i), DEBUG_PROBE); chp->ch_drive[i].drive_flags &= ~DRIVE_OLD; } } } ctrl_flags = chp->wdc->sc_dev.dv_cfdata->cf_flags; channel_flags = (ctrl_flags >> (NBBY * chp->channel)) & 0xff; WDCDEBUG_PRINT(("wdcattach: ch_drive_flags 0x%x 0x%x\n", chp->ch_drive[0].drive_flags, chp->ch_drive[1].drive_flags), DEBUG_PROBE); /* If no drives, abort here */ if ((chp->ch_drive[0].drive_flags & DRIVE) == 0 && (chp->ch_drive[1].drive_flags & DRIVE) == 0) return; /* * Attach an ATAPI bus, if needed. */ if ((chp->ch_drive[0].drive_flags & DRIVE_ATAPI) || (chp->ch_drive[1].drive_flags & DRIVE_ATAPI)) { #if NATAPISCSI > 0 wdc_atapibus_attach(chp); #else /* * Fills in a fake aa_link and call config_found, so that * the config machinery will print * "atapibus at xxx not configured" */ bzero(&aa_link, sizeof(struct ata_atapi_attach)); aa_link.aa_type = T_ATAPI; aa_link.aa_channel = chp->channel; aa_link.aa_openings = 1; aa_link.aa_drv_data = 0; aa_link.aa_bus_private = NULL; (void)config_found(&chp->wdc->sc_dev, (void *)&aa_link, atapi_print); #endif } for (i = 0; i < 2; i++) { if ((chp->ch_drive[i].drive_flags & (DRIVE_ATA | DRIVE_OLD)) == 0) { continue; } bzero(&aa_link, sizeof(struct ata_atapi_attach)); aa_link.aa_type = T_ATA; aa_link.aa_channel = chp->channel; aa_link.aa_openings = 1; aa_link.aa_drv_data = &chp->ch_drive[i]; if (config_found(&chp->wdc->sc_dev, (void *)&aa_link, wdprint)) wdc_probe_caps(&chp->ch_drive[i]); } /* * reset drive_flags for unnatached devices, reset state for attached * ones */ for (i = 0; i < 2; i++) { if (chp->ch_drive[i].drv_softc == NULL) chp->ch_drive[i].drive_flags = 0; else chp->ch_drive[i].state = 0; } /* * Reset channel. The probe, with some combinations of ATA/ATAPI * devices keep it in a mostly working, but strange state (with busy * led on) */ if ((chp->wdc->cap & WDC_CAPABILITY_NO_EXTRA_RESETS) == 0) { wdcreset(chp, VERBOSE); /* * Read status registers to avoid spurious interrupts. */ for (i = 1; i >= 0; i--) { if (chp->ch_drive[i].drive_flags & DRIVE) { bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | (i << 4)); if (wait_for_unbusy(chp, 10000) < 0) printf("%s:%d:%d: device busy\n", chp->wdc->sc_dev.dv_xname, chp->channel, i); } } } #ifndef __OpenBSD__ wdc_delref(chp); #endif } void wdc_final_attach(chp) struct channel_softc *chp; { #if NATAPISCSI > 0 wdc_atapibus_final_attach(chp); #endif } /* * Start I/O on a controller, for the given channel. * The first xfer may be not for our channel if the channel queues * are shared. */ void wdcstart(chp) struct channel_softc *chp; { struct wdc_xfer *xfer; #ifdef WDC_DIAGNOSTIC int spl1, spl2; spl1 = splbio(); spl2 = splbio(); if (spl2 != spl1) { printf("wdcstart: not at splbio()\n"); panic("wdcstart"); } splx(spl2); splx(spl1); #endif /* WDC_DIAGNOSTIC */ /* is there a xfer ? */ if ((xfer = chp->ch_queue->sc_xfer.tqh_first) == NULL) return; /* adjust chp, in case we have a shared queue */ chp = xfer->chp; if ((chp->ch_flags & WDCF_ACTIVE) != 0 ) { return; /* channel aleady active */ } #ifdef DIAGNOSTIC if ((chp->ch_flags & WDCF_IRQ_WAIT) != 0) panic("wdcstart: channel waiting for irq\n"); #endif if (chp->wdc->cap & WDC_CAPABILITY_HWLOCK) if (!(*chp->wdc->claim_hw)(chp, 0)) return; WDCDEBUG_PRINT(("wdcstart: xfer %p channel %d drive %d\n", xfer, chp->channel, xfer->drive), DEBUG_XFERS); chp->ch_flags |= WDCF_ACTIVE; if (chp->ch_drive[xfer->drive].drive_flags & DRIVE_RESET) { chp->ch_drive[xfer->drive].drive_flags &= ~DRIVE_RESET; chp->ch_drive[xfer->drive].state = 0; } xfer->c_start(chp, xfer); } /* restart an interrupted I/O */ void wdcrestart(v) void *v; { struct channel_softc *chp = v; int s; s = splbio(); wdcstart(chp); splx(s); } /* * Interrupt routine for the controller. Acknowledge the interrupt, check for * errors on the current operation, mark it done if necessary, and start the * next request. Also check for a partially done transfer, and continue with * the next chunk if so. */ int wdcintr(arg) void *arg; { struct channel_softc *chp = arg; struct wdc_xfer *xfer; if ((chp->ch_flags & WDCF_IRQ_WAIT) == 0) { WDCDEBUG_PRINT(("wdcintr: inactive controller\n"), DEBUG_INTR); return 0; } WDCDEBUG_PRINT(("wdcintr\n"), DEBUG_INTR); untimeout(wdctimeout, chp); chp->ch_flags &= ~WDCF_IRQ_WAIT; xfer = chp->ch_queue->sc_xfer.tqh_first; return xfer->c_intr(chp, xfer, 1); } /* Put all disk in RESET state */ void wdc_reset_channel(drvp) struct ata_drive_datas *drvp; { struct channel_softc *chp = drvp->chnl_softc; int drive; WDCDEBUG_PRINT(("ata_reset_channel %s:%d for drive %d\n", chp->wdc->sc_dev.dv_xname, chp->channel, drvp->drive), DEBUG_FUNCS); (void) wdcreset(chp, VERBOSE); for (drive = 0; drive < 2; drive++) { chp->ch_drive[drive].state = 0; } } int wdcreset(chp, verb) struct channel_softc *chp; int verb; { int drv_mask1, drv_mask2; bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM); /* master */ bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_RST | WDCTL_IDS); delay(1000); bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_IDS); delay(2000); (void) bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_error); bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); drv_mask1 = (chp->ch_drive[0].drive_flags & DRIVE) ? 0x01:0x00; drv_mask1 |= (chp->ch_drive[1].drive_flags & DRIVE) ? 0x02:0x00; drv_mask2 = __wdcwait_reset(chp, drv_mask1); if (verb && drv_mask2 != drv_mask1) { printf("%s channel %d: reset failed for", chp->wdc->sc_dev.dv_xname, chp->channel); if ((drv_mask1 & 0x01) != 0 && (drv_mask2 & 0x01) == 0) printf(" drive 0"); if ((drv_mask1 & 0x02) != 0 && (drv_mask2 & 0x02) == 0) printf(" drive 1"); printf("\n"); } return (drv_mask1 != drv_mask2) ? 1 : 0; } static int __wdcwait_reset(chp, drv_mask) struct channel_softc *chp; int drv_mask; { int timeout; u_int8_t st0, st1; /* Wait 50ms for drive firmware to settle */ delay(50000); /* wait for BSY to deassert */ for (timeout = 0; timeout < WDCNDELAY_RST;timeout++) { bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM); /* master */ delay(10); st0 = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_status); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | 0x10); /* slave */ delay(10); st1 = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_status); if ((drv_mask & 0x01) == 0) { /* no master */ if ((drv_mask & 0x02) != 0 && (st1 & WDCS_BSY) == 0) { /* No master, slave is ready, it's done */ goto end; } } else if ((drv_mask & 0x02) == 0) { /* no slave */ if ((drv_mask & 0x01) != 0 && (st0 & WDCS_BSY) == 0) { /* No slave, master is ready, it's done */ goto end; } } else { /* Wait for both master and slave to be ready */ if ((st0 & WDCS_BSY) == 0 && (st1 & WDCS_BSY) == 0) { goto end; } } delay(WDCDELAY); } /* Reset timed out. Maybe it's because drv_mask was not rigth */ if (st0 & WDCS_BSY) drv_mask &= ~0x01; if (st1 & WDCS_BSY) drv_mask &= ~0x02; end: WDCDEBUG_PRINT(("%s:%d: wdcwait_reset() end, st0=0x%x, st1=0x%x\n", chp->wdc ? chp->wdc->sc_dev.dv_xname : "wdcprobe", chp->channel, st0, st1), DEBUG_PROBE); return drv_mask; } /* * Wait for a drive to be !BSY, and have mask in its status register. * return -1 for a timeout after "timeout" ms. */ int wdcwait(chp, mask, bits, timeout) struct channel_softc *chp; int mask, bits, timeout; { u_char status; int time = 0; #ifdef WDCNDELAY_DEBUG extern int cold; #endif WDCDEBUG_PRINT(("wdcwait %s:%d\n", chp->wdc ?chp->wdc->sc_dev.dv_xname :"none", chp->channel), DEBUG_STATUS); chp->ch_error = 0; timeout = timeout * 1000 / WDCDELAY; /* delay uses microseconds */ for (;;) { chp->ch_status = status = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_status); if ((status & WDCS_BSY) == 0 && (status & mask) == bits) break; if (++time > timeout) { WDCDEBUG_PRINT(("wdcwait: timeout, status %x " "error %x\n", status, bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_error)), DEBUG_STATUS); return -1; } delay(WDCDELAY); } if (status & WDCS_ERR) chp->ch_error = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_error); #ifdef WDCNDELAY_DEBUG /* After autoconfig, there should be no long delays. */ if (!cold && time > WDCNDELAY_DEBUG) { struct wdc_xfer *xfer = chp->ch_queue->sc_xfer.tqh_first; if (xfer == NULL) printf("%s channel %d: warning: busy-wait took %dus\n", chp->wdc->sc_dev.dv_xname, chp->channel, WDCDELAY * time); else printf("%s:%d:%d: warning: busy-wait took %dus\n", chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, WDCDELAY * time); } #endif return 0; } void wdctimeout(arg) void *arg; { struct channel_softc *chp = (struct channel_softc *)arg; struct wdc_xfer *xfer = chp->ch_queue->sc_xfer.tqh_first; int s; WDCDEBUG_PRINT(("wdctimeout\n"), DEBUG_FUNCS); s = splbio(); if ((chp->ch_flags & WDCF_IRQ_WAIT) != 0) { __wdcerror(chp, "lost interrupt"); printf("\ttype: %s\n", (xfer->c_flags & C_ATAPI) ? "atapi":"ata"); printf("\tc_bcount: %d\n", xfer->c_bcount); printf("\tc_skip: %d\n", xfer->c_skip); /* * Call the interrupt routine. If we just missed and interrupt, * it will do what's needed. Else, it will take the needed * action (reset the device). */ xfer->c_flags |= C_TIMEOU; chp->ch_flags &= ~WDCF_IRQ_WAIT; xfer->c_intr(chp, xfer, 1); } else __wdcerror(chp, "missing untimeout"); splx(s); } /* * Probe drive's capabilites, for use by the controller later * Assumes drvp points to an existing drive. * XXX this should be a controller-indep function */ void wdc_probe_caps(drvp) struct ata_drive_datas *drvp; { struct ataparams params, params2; struct channel_softc *chp = drvp->chnl_softc; struct device *drv_dev = drvp->drv_softc; struct wdc_softc *wdc = chp->wdc; int i, printed; char *sep = ""; int cf_flags; if (ata_get_params(drvp, AT_POLL, ¶ms) != CMD_OK) { /* IDENTIFY failed. Can't tell more about the device */ return; } printf("%s: ", drv_dev->dv_xname); if ((wdc->cap & (WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32)) == (WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32)) { /* * Controller claims 16 and 32 bit transfers. * Re-do an IDENTIFY with 32-bit transfers, * and compare results. */ drvp->drive_flags |= DRIVE_CAP32; ata_get_params(drvp, AT_POLL, ¶ms2); if (bcmp(¶ms, ¶ms2, sizeof(struct ataparams)) != 0) { /* Not good. fall back to 16bits */ drvp->drive_flags &= ~DRIVE_CAP32; printf("16-bit"); } else printf("32-bit"); sep = ", "; } #if 0 /* Some ultra-DMA drives claims to only support ATA-3. sigh */ if (params.atap_ata_major > 0x01 && params.atap_ata_major != 0xffff) { for (i = 14; i > 0; i--) { if (params.atap_ata_major & (1 << i)) { printf("%sATA version %d\n", sep, i); drvp->ata_vers = i; break; } } } else #endif /* An ATAPI device is at last PIO mode 3 */ if (drvp->drive_flags & DRIVE_ATAPI) drvp->PIO_mode = 3; /* * It's not in the specs, but it seems that some drive * returns 0xffff in atap_extensions when this field is invalid */ if (params.atap_extensions != 0xffff && (params.atap_extensions & WDC_EXT_MODES)) { printed = 0; /* * XXX some drives report something wrong here (they claim to * support PIO mode 8 !). As mode is coded on 3 bits in * SET FEATURE, limit it to 7 (so limit i to 4). * If higther mode than 7 is found, abort. */ for (i = 7; i >= 0; i--) { if ((params.atap_piomode_supp & (1 << i)) == 0) continue; if (i > 4) { printf("\n"); return; } /* * See if mode is accepted. * If the controller can't set its PIO mode, * assume the defaults are good, so don't try * to set it */ if ((wdc->cap & WDC_CAPABILITY_MODE) != 0) if (ata_set_mode(drvp, 0x08 | (i + 3), AT_POLL) != CMD_OK) continue; if (!printed) { printf("%ssupports PIO mode %d", sep, i + 3); sep = ", "; printed = 1; } /* * If controller's driver can't set its PIO mode, * get the highter one for the drive. */ if ((wdc->cap & WDC_CAPABILITY_MODE) == 0 || wdc->PIO_cap >= i + 3) { drvp->PIO_mode = i + 3; drvp->PIO_cap = i + 3; break; } } if (!printed) { /* * We didn't find a valid PIO mode. * Assume the values returned for DMA are buggy too */ printf("\n"); return; } drvp->drive_flags |= DRIVE_MODE; printed = 0; for (i = 7; i >= 0; i--) { if ((params.atap_dmamode_supp & (1 << i)) == 0) continue; if ((wdc->cap & WDC_CAPABILITY_DMA) && (wdc->cap & WDC_CAPABILITY_MODE)) if (ata_set_mode(drvp, 0x20 | i, AT_POLL) != CMD_OK) continue; if (!printed) { printf("%sDMA mode %d", sep, i); sep = ", "; printed = 1; } if (wdc->cap & WDC_CAPABILITY_DMA) { if ((wdc->cap & WDC_CAPABILITY_MODE) && wdc->DMA_cap < i) continue; drvp->DMA_mode = i; drvp->DMA_cap = i; drvp->drive_flags |= DRIVE_DMA; } break; } if (params.atap_extensions & WDC_EXT_UDMA_MODES) { for (i = 7; i >= 0; i--) { if ((params.atap_udmamode_supp & (1 << i)) == 0) continue; if ((wdc->cap & WDC_CAPABILITY_MODE) && (wdc->cap & WDC_CAPABILITY_UDMA)) if (ata_set_mode(drvp, 0x40 | i, AT_POLL) != CMD_OK) continue; printf("%sUltra-DMA mode %d", sep, i); sep = ", "; if (wdc->cap & WDC_CAPABILITY_UDMA) { if ((wdc->cap & WDC_CAPABILITY_MODE) && wdc->UDMA_cap < i) continue; drvp->UDMA_mode = i; drvp->UDMA_cap = i; drvp->drive_flags |= DRIVE_UDMA; } break; } } } printf("\n"); /* Try to guess ATA version here, if it didn't get reported */ if (drvp->ata_vers == 0) { if (drvp->drive_flags & DRIVE_UDMA) drvp->ata_vers = 4; /* should be at last ATA-4 */ else if (drvp->PIO_cap > 2) drvp->ata_vers = 2; /* should be at last ATA-2 */ } cf_flags = drv_dev->dv_cfdata->cf_flags; if (cf_flags & ATA_CONFIG_PIO_SET) { drvp->PIO_mode = (cf_flags & ATA_CONFIG_PIO_MODES) >> ATA_CONFIG_PIO_OFF; drvp->drive_flags |= DRIVE_MODE; } if ((wdc->cap & WDC_CAPABILITY_DMA) == 0) { /* don't care about DMA modes */ return; } if (cf_flags & ATA_CONFIG_DMA_SET) { if ((cf_flags & ATA_CONFIG_DMA_MODES) == ATA_CONFIG_DMA_DISABLE) { drvp->drive_flags &= ~DRIVE_DMA; } else { drvp->DMA_mode = (cf_flags & ATA_CONFIG_DMA_MODES) >> ATA_CONFIG_DMA_OFF; drvp->drive_flags |= DRIVE_DMA | DRIVE_MODE; } } if (cf_flags & ATA_CONFIG_UDMA_SET) { if ((cf_flags & ATA_CONFIG_UDMA_MODES) == ATA_CONFIG_UDMA_DISABLE) { drvp->drive_flags &= ~DRIVE_UDMA; } else { drvp->UDMA_mode = (cf_flags & ATA_CONFIG_UDMA_MODES) >> ATA_CONFIG_UDMA_OFF; drvp->drive_flags |= DRIVE_UDMA | DRIVE_MODE; } } } /* * downgrade the transfer mode of a drive after an error. return 1 if * downgrade was possible, 0 otherwise. */ int wdc_downgrade_mode(drvp) struct ata_drive_datas *drvp; { struct channel_softc *chp = drvp->chnl_softc; struct device *drv_dev = drvp->drv_softc; struct wdc_softc *wdc = chp->wdc; int cf_flags = drv_dev->dv_cfdata->cf_flags; /* if drive or controller don't know its mode, we can't do much */ if ((drvp->drive_flags & DRIVE_MODE) == 0 || (wdc->cap & WDC_CAPABILITY_MODE) == 0) return 0; /* current drive mode was set by a config flag, let it this way */ if ((cf_flags & ATA_CONFIG_PIO_SET) || (cf_flags & ATA_CONFIG_DMA_SET) || (cf_flags & ATA_CONFIG_UDMA_SET)) return 0; /* * If we were using ultra-DMA, don't downgrade to multiword DMA * if we noticed a CRC error. It has been noticed that CRC errors * in ultra-DMA lead to silent data corruption in multiword DMA. * Data corruption is less likely to occur in PIO mode. */ if ((drvp->drive_flags & DRIVE_UDMA) && (drvp->drive_flags & DRIVE_DMAERR) == 0) { drvp->drive_flags &= ~DRIVE_UDMA; drvp->drive_flags |= DRIVE_DMA; drvp->DMA_mode = drvp->DMA_cap; printf("%s: transfer error, downgrading to DMA mode %d\n", drv_dev->dv_xname, drvp->DMA_mode); } else if (drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) { drvp->drive_flags &= ~(DRIVE_DMA | DRIVE_UDMA); drvp->PIO_mode = drvp->PIO_cap; printf("%s: transfer error, downgrading to PIO mode %d\n", drv_dev->dv_xname, drvp->PIO_mode); } else /* already using PIO, can't downgrade */ return 0; wdc->set_modes(chp); /* reset the channel, which will schedule all drives for setup */ wdc_reset_channel(drvp); return 1; } int wdc_exec_command(drvp, wdc_c) struct ata_drive_datas *drvp; struct wdc_command *wdc_c; { struct channel_softc *chp = drvp->chnl_softc; struct wdc_xfer *xfer; int s, ret; WDCDEBUG_PRINT(("wdc_exec_command %s:%d:%d\n", chp->wdc->sc_dev.dv_xname, chp->channel, drvp->drive), DEBUG_FUNCS); /* set up an xfer and queue. Wait for completion */ xfer = wdc_get_xfer(wdc_c->flags & AT_WAIT ? WDC_CANSLEEP : WDC_NOSLEEP); if (xfer == NULL) { return WDC_TRY_AGAIN; } if (wdc_c->flags & AT_POLL) xfer->c_flags |= C_POLL; xfer->drive = drvp->drive; xfer->databuf = wdc_c->data; xfer->c_bcount = wdc_c->bcount; xfer->cmd = wdc_c; xfer->c_start = __wdccommand_start; xfer->c_intr = __wdccommand_intr; s = splbio(); wdc_exec_xfer(chp, xfer); #ifdef DIAGNOSTIC if ((wdc_c->flags & AT_POLL) != 0 && (wdc_c->flags & AT_DONE) == 0) panic("wdc_exec_command: polled command not done\n"); #endif if (wdc_c->flags & AT_DONE) { ret = WDC_COMPLETE; } else { if (wdc_c->flags & AT_WAIT) { WDCDEBUG_PRINT(("wdc_exec_command sleeping"), DEBUG_FUNCS); while (!(wdc_c->flags & AT_DONE)) { int error; error = tsleep(wdc_c, PRIBIO, "wdccmd", 0); if (error) { printf ("tsleep error: %d\n", error); } } WDCDEBUG_PRINT(("wdc_exec_command waking"), DEBUG_FUNCS); ret = WDC_COMPLETE; } else { ret = WDC_QUEUED; } } splx(s); return ret; } void __wdccommand_start(chp, xfer) struct channel_softc *chp; struct wdc_xfer *xfer; { int drive = xfer->drive; struct wdc_command *wdc_c = xfer->cmd; WDCDEBUG_PRINT(("__wdccommand_start %s:%d:%d\n", chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive), DEBUG_FUNCS); /* * Disable interrupts if we're polling */ if (xfer->c_flags & C_POLL) { wdc_disable_intr(chp); } /* * Make sure the bus isn't busy */ if (wdc_select_drive(chp, drive, wdc_c->timeout) != 0) { wdc_c->flags |= AT_TIMEOU; __wdccommand_done(chp, xfer); return; } wdccommand(chp, drive, wdc_c->r_command, wdc_c->r_cyl, wdc_c->r_head, wdc_c->r_sector, wdc_c->r_count, wdc_c->r_precomp); if ((wdc_c->flags & AT_POLL) == 0) { chp->ch_flags |= WDCF_IRQ_WAIT; /* wait for interrupt */ timeout(wdctimeout, chp, wdc_c->timeout / 1000 * hz); return; } /* * Polled command. Wait for drive ready or drq. Done in intr(). * Wait for at last 400ns for status bit to be valid. */ delay(10); __wdccommand_intr(chp, xfer, 0); } int __wdccommand_intr(chp, xfer, irq) struct channel_softc *chp; struct wdc_xfer *xfer; int irq; { struct wdc_command *wdc_c = xfer->cmd; int bcount = wdc_c->bcount; char *data = wdc_c->data; WDCDEBUG_PRINT(("__wdccommand_intr %s:%d:%d\n", chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive), DEBUG_INTR); if (wdcwait(chp, wdc_c->r_st_pmask, wdc_c->r_st_pmask, (irq == 0) ? wdc_c->timeout : 0)) { if (irq && (xfer->c_flags & C_TIMEOU) == 0) return 0; /* IRQ was not for us */ wdc_c->flags |= AT_TIMEOU; __wdccommand_done(chp, xfer); WDCDEBUG_PRINT(("__wdccommand_intr returned\n"), DEBUG_INTR); return 1; } if (wdc_c->flags & AT_READ) { if (chp->ch_drive[xfer->drive].drive_flags & DRIVE_CAP32) { bus_space_read_multi_4(chp->data32iot, chp->data32ioh, 0, (u_int32_t*)data, bcount >> 2); data += bcount & 0xfffffffc; bcount = bcount & 0x03; } if (bcount > 0) bus_space_read_multi_2(chp->cmd_iot, chp->cmd_ioh, wd_data, (u_int16_t *)data, bcount >> 1); } else if (wdc_c->flags & AT_WRITE) { if (chp->ch_drive[xfer->drive].drive_flags & DRIVE_CAP32) { bus_space_write_multi_4(chp->data32iot, chp->data32ioh, 0, (u_int32_t*)data, bcount >> 2); data += bcount & 0xfffffffc; bcount = bcount & 0x03; } if (bcount > 0) bus_space_write_multi_2(chp->cmd_iot, chp->cmd_ioh, wd_data, (u_int16_t *)data, bcount >> 1); } __wdccommand_done(chp, xfer); WDCDEBUG_PRINT(("__wdccommand_intr returned\n"), DEBUG_INTR); return 1; } void __wdccommand_done(chp, xfer) struct channel_softc *chp; struct wdc_xfer *xfer; { int needdone = xfer->c_flags & C_NEEDDONE; struct wdc_command *wdc_c = xfer->cmd; WDCDEBUG_PRINT(("__wdccommand_done %s:%d:%d\n", chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive), DEBUG_FUNCS); if (chp->ch_status & WDCS_DWF) wdc_c->flags |= AT_DF; if (chp->ch_status & WDCS_ERR) { wdc_c->flags |= AT_ERROR; wdc_c->r_error = chp->ch_error; } wdc_c->flags |= AT_DONE; if (wdc_c->flags & AT_READREG && (wdc_c->flags & (AT_ERROR | AT_DF)) == 0) { wdc_c->r_head = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh); wdc_c->r_cyl = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_hi) << 8; wdc_c->r_cyl |= bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_lo); wdc_c->r_sector = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_sector); wdc_c->r_count = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_seccnt); wdc_c->r_error = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_error); wdc_c->r_precomp = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_precomp); } if (xfer->c_flags & C_POLL) { wdc_enable_intr(chp); } wdc_free_xfer(chp, xfer); WDCDEBUG_PRINT(("__wdccommand_done before callback\n"), DEBUG_INTR); if (needdone) { if (wdc_c->flags & AT_WAIT) wakeup(wdc_c); else wdc_c->callback(wdc_c->callback_arg); } wdcstart(chp); WDCDEBUG_PRINT(("__wdccommand_done returned\n"), DEBUG_INTR); return; } /* * Send a command. The drive should be ready. * Assumes interrupts are blocked. */ void wdccommand(chp, drive, command, cylin, head, sector, count, precomp) struct channel_softc *chp; u_int8_t drive; u_int8_t command; u_int16_t cylin; u_int8_t head, sector, count, precomp; { WDCDEBUG_PRINT(("wdccommand %s:%d:%d: command=0x%x cylin=%d head=%d " "sector=%d count=%d precomp=%d\n", chp->wdc->sc_dev.dv_xname, chp->channel, drive, command, cylin, head, sector, count, precomp), DEBUG_FUNCS); /* Select drive, head, and addressing mode. */ bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | (drive << 4) | head); /* Load parameters. wd_features(ATA/ATAPI) = wd_precomp(ST506) */ bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_precomp, precomp); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_lo, cylin); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_hi, cylin >> 8); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sector, sector); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_seccnt, count); /* Send command. */ bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_command, command); return; } /* * Simplified version of wdccommand(). Unbusy/ready/drq must be * tested by the caller. */ void wdccommandshort(chp, drive, command) struct channel_softc *chp; int drive; int command; { WDCDEBUG_PRINT(("wdccommandshort %s:%d:%d command 0x%x\n", chp->wdc->sc_dev.dv_xname, chp->channel, drive, command), DEBUG_FUNCS); /* Select drive. */ bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh, WDSD_IBM | (drive << 4)); bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_command, command); } /* Add a command to the queue and start controller. Must be called at splbio */ void wdc_exec_xfer(chp, xfer) struct channel_softc *chp; struct wdc_xfer *xfer; { WDCDEBUG_PRINT(("wdc_exec_xfer %p channel %d drive %d\n", xfer, chp->channel, xfer->drive), DEBUG_XFERS); /* complete xfer setup */ xfer->chp = chp; /* * If we are a polled command, and the list is not empty, * we are doing a dump. Drop the list to allow the polled command * to complete, we're going to reboot soon anyway. */ if ((xfer->c_flags & C_POLL) != 0 && chp->ch_queue->sc_xfer.tqh_first != NULL) { TAILQ_INIT(&chp->ch_queue->sc_xfer); } /* insert at the end of command list */ TAILQ_INSERT_TAIL(&chp->ch_queue->sc_xfer,xfer , c_xferchain); WDCDEBUG_PRINT(("wdcstart from wdc_exec_xfer, flags 0x%x\n", chp->ch_flags), DEBUG_XFERS); wdcstart(chp); xfer->c_flags |= C_NEEDDONE; /* we can now call upper level done() */ } struct wdc_xfer * wdc_get_xfer(flags) int flags; { struct wdc_xfer *xfer; int s; s = splbio(); if ((xfer = xfer_free_list.lh_first) != NULL) { LIST_REMOVE(xfer, free_list); splx(s); #ifdef DIAGNOSTIC if ((xfer->c_flags & C_INUSE) != 0) panic("wdc_get_xfer: xfer already in use\n"); #endif } else { splx(s); WDCDEBUG_PRINT(("wdc:making xfer %d\n",wdc_nxfer), DEBUG_XFERS); xfer = malloc(sizeof(*xfer), M_DEVBUF, ((flags & WDC_NOSLEEP) != 0 ? M_NOWAIT : M_WAITOK)); if (xfer == NULL) return 0; #ifdef DIAGNOSTIC xfer->c_flags &= ~C_INUSE; #endif #ifdef WDCDEBUG wdc_nxfer++; #endif } #ifdef DIAGNOSTIC if ((xfer->c_flags & C_INUSE) != 0) panic("wdc_get_xfer: xfer already in use\n"); #endif bzero(xfer, sizeof(struct wdc_xfer)); xfer->c_flags = C_INUSE; return xfer; } void wdc_free_xfer(chp, xfer) struct channel_softc *chp; struct wdc_xfer *xfer; { struct wdc_softc *wdc = chp->wdc; int s; if (wdc->cap & WDC_CAPABILITY_HWLOCK) (*wdc->free_hw)(chp); s = splbio(); chp->ch_flags &= ~WDCF_ACTIVE; TAILQ_REMOVE(&chp->ch_queue->sc_xfer, xfer, c_xferchain); xfer->c_flags &= ~C_INUSE; LIST_INSERT_HEAD(&xfer_free_list, xfer, free_list); splx(s); } static void __wdcerror(chp, msg) struct channel_softc *chp; char *msg; { struct wdc_xfer *xfer = chp->ch_queue->sc_xfer.tqh_first; if (xfer == NULL) printf("%s:%d: %s\n", chp->wdc->sc_dev.dv_xname, chp->channel, msg); else printf("%s:%d:%d: %s\n", chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, msg); } /* * the bit bucket */ void wdcbit_bucket(chp, size) struct channel_softc *chp; int size; { for (; size >= 2; size -= 2) (void)bus_space_read_2(chp->cmd_iot, chp->cmd_ioh, wd_data); if (size) (void)bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_data); } #ifndef __OpenBSD__ int wdc_addref(chp) struct channel_softc *chp; { struct wdc_softc *wdc = chp->wdc; struct scsipi_adapter *adapter = &wdc->sc_atapi_adapter; int s, error = 0; s = splbio(); if (adapter->scsipi_refcnt++ == 0 && adapter->scsipi_enable != NULL) { error = (*adapter->scsipi_enable)(wdc, 1); if (error) adapter->scsipi_refcnt--; } splx(s); return (error); } void wdc_delref(chp) struct channel_softc *chp; { struct wdc_softc *wdc = chp->wdc; struct scsipi_adapter *adapter = &wdc->sc_atapi_adapter; int s; s = splbio(); if (adapter->scsipi_refcnt-- == 1 && adapter->scsipi_enable != NULL) (void) (*adapter->scsipi_enable)(wdc, 0); splx(s); } #endif