/* $NetBSD: wdc.c,v 1.288.2.1 2018/11/26 01:52:31 pgoyette Exp $ */ /* * Copyright (c) 1998, 2001, 2003 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. * * 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, 2003, 2004 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. * * 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: */ #include __KERNEL_RCSID(0, "$NetBSD: wdc.c,v 1.288.2.1 2018/11/26 01:52:31 pgoyette Exp $"); #include "opt_ata.h" #include "opt_wdc.h" #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 #define bus_space_read_stream_2 bus_space_read_2 #define bus_space_read_stream_4 bus_space_read_4 #define bus_space_write_stream_2 bus_space_write_2 #define bus_space_write_stream_4 bus_space_write_4 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ #include #include #include #include #include #include #include "locators.h" #include "atapibus.h" #include "wd.h" #include "sata.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 /* When polling wait that much and then kpause for 1/hz seconds */ #define WDCDELAY_POLL 1 /* ms */ /* timeout for the control commands */ #define WDC_CTRL_DELAY 10000 /* 10s, for the recall command */ /* * timeout when waiting for BSY to deassert when probing. * set to 5s. From the standards this could be up to 31, but we can't * wait that much at boot time, and 5s seems to be enough. */ #define WDC_PROBE_WAIT 5 #if NWD > 0 extern const struct ata_bustype wdc_ata_bustype; /* in ata_wdc.c */ #else /* A fake one, the autoconfig will print "wd at foo ... not configured */ const struct ata_bustype wdc_ata_bustype = { .bustype_type = SCSIPI_BUSTYPE_ATA, .ata_bio = NULL, .ata_reset_drive = NULL, .ata_reset_channel = wdc_reset_channel, .ata_exec_command = wdc_exec_command, .ata_get_params = NULL, .ata_addref = NULL, .ata_delref = NULL, .ata_killpending = NULL, .ata_recovery = NULL, }; #endif /* Flags to wdcreset(). */ #define RESET_POLL 1 #define RESET_SLEEP 0 /* wdcreset() will use kpause() */ static int wdcprobe1(struct ata_channel *, int); static int wdcreset(struct ata_channel *, int); static void __wdcerror(struct ata_channel *, const char *); static int __wdcwait_reset(struct ata_channel *, int, int); static void __wdccommand_done(struct ata_channel *, struct ata_xfer *); static void __wdccommand_poll(struct ata_channel *, struct ata_xfer *); static void __wdccommand_done_end(struct ata_channel *, struct ata_xfer *); static void __wdccommand_kill_xfer(struct ata_channel *, struct ata_xfer *, int); static int __wdccommand_start(struct ata_channel *, struct ata_xfer *); static int __wdccommand_intr(struct ata_channel *, struct ata_xfer *, int); static int __wdcwait(struct ata_channel *, int, int, int, int *); static void wdc_datain_pio(struct ata_channel *, int, void *, size_t); static void wdc_dataout_pio(struct ata_channel *, int, void *, size_t); #define DEBUG_INTR 0x01 #define DEBUG_XFERS 0x02 #define DEBUG_STATUS 0x04 #define DEBUG_FUNCS 0x08 #define DEBUG_PROBE 0x10 #define DEBUG_DETACH 0x20 #define DEBUG_DELAY 0x40 #ifdef ATADEBUG extern int atadebug_mask; /* init'ed in ata.c */ int wdc_nxfer = 0; #define ATADEBUG_PRINT(args, level) if (atadebug_mask & (level)) printf args #else #define ATADEBUG_PRINT(args, level) #endif /* * Initialize the "shadow register" handles for a standard wdc controller. */ void wdc_init_shadow_regs(struct wdc_regs *wdr) { wdr->cmd_iohs[wd_status] = wdr->cmd_iohs[wd_command]; wdr->cmd_iohs[wd_features] = wdr->cmd_iohs[wd_error]; } /* * Allocate a wdc_regs array, based on the number of channels. */ void wdc_allocate_regs(struct wdc_softc *wdc) { wdc->regs = malloc(wdc->sc_atac.atac_nchannels * sizeof(struct wdc_regs), M_DEVBUF, M_WAITOK); } #if NSATA > 0 /* * probe drives on SATA controllers with standard SATA registers: * bring the PHYs online, read the drive signature and set drive flags * appropriately. */ void wdc_sataprobe(struct ata_channel *chp) { struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp); uint8_t st = 0, sc __unused, sn __unused, cl, ch; int i; KASSERT(chp->ch_ndrives == 0 || chp->ch_drive != NULL); /* do this before we take lock */ ata_channel_lock(chp); /* reset the PHY and bring online */ switch (sata_reset_interface(chp, wdr->sata_iot, wdr->sata_control, wdr->sata_status, AT_WAIT)) { case SStatus_DET_DEV: /* wait 5s for BSY to clear */ for (i = 0; i < WDC_PROBE_WAIT * hz; i++) { bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); delay(10); /* 400ns delay */ st = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); if ((st & WDCS_BSY) == 0) break; ata_delay(chp, 1, "sataprb", AT_WAIT); } if (i == WDC_PROBE_WAIT * hz) aprint_error_dev(chp->ch_atac->atac_dev, "BSY never cleared, status 0x%02x\n", st); sc = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0); sn = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); ch = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0); ATADEBUG_PRINT(("%s: port %d: sc=0x%x sn=0x%x " "cl=0x%x ch=0x%x\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, sc, sn, cl, ch), DEBUG_PROBE); if (atabus_alloc_drives(chp, 1) != 0) return; /* * sc and sn are supposed to be 0x1 for ATAPI, but in some * cases we get wrong values here, so ignore it. */ if (cl == 0x14 && ch == 0xeb) chp->ch_drive[0].drive_type = ATA_DRIVET_ATAPI; else chp->ch_drive[0].drive_type = ATA_DRIVET_ATA; /* * issue a reset in case only the interface part of the drive * is up */ if (wdcreset(chp, RESET_SLEEP) != 0) chp->ch_drive[0].drive_type = ATA_DRIVET_NONE; break; default: break; } ata_channel_unlock(chp); } #endif /* NSATA > 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). Similarly if the status register has * the value we last wrote to the bus (for IDE interfaces without pullups). * 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. */ void wdc_drvprobe(struct ata_channel *chp) { struct ataparams params; /* XXX: large struct */ struct atac_softc *atac = chp->ch_atac; struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; u_int8_t st0 = 0, st1 = 0; int i, j, error, tfd; if (atabus_alloc_drives(chp, wdc->wdc_maxdrives) != 0) return; if (wdcprobe1(chp, 0) == 0) { /* No drives, abort the attach here. */ atabus_free_drives(chp); return; } ata_channel_lock(chp); /* for ATA/OLD drives, wait for DRDY, 3s timeout */ for (i = 0; i < mstohz(3000); i++) { /* * select drive 1 first, so that master is selected on * exit from the loop */ if (chp->ch_ndrives > 1 && chp->ch_drive[1].drive_type == ATA_DRIVET_ATA) { if (wdc->select) wdc->select(chp,1); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | 0x10); delay(10); /* 400ns delay */ st1 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); } if (chp->ch_drive[0].drive_type == ATA_DRIVET_ATA) { if (wdc->select) wdc->select(chp,0); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); delay(10); /* 400ns delay */ st0 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); } if ((chp->ch_drive[0].drive_type != ATA_DRIVET_ATA || (st0 & WDCS_DRDY)) && (chp->ch_ndrives < 2 || chp->ch_drive[1].drive_type != ATA_DRIVET_ATA || (st1 & WDCS_DRDY))) break; #ifdef WDC_NO_IDS /* cannot kpause here (can't enable IPL_BIO interrups), * delay instead */ delay(1000000 / hz); #else ata_delay(chp, 1, "atadrdy", AT_WAIT); #endif } if ((st0 & WDCS_DRDY) == 0 && chp->ch_drive[0].drive_type != ATA_DRIVET_ATAPI) chp->ch_drive[0].drive_type = ATA_DRIVET_NONE; if (chp->ch_ndrives > 1 && (st1 & WDCS_DRDY) == 0 && chp->ch_drive[1].drive_type != ATA_DRIVET_ATAPI) chp->ch_drive[1].drive_type = ATA_DRIVET_NONE; ata_channel_unlock(chp); ATADEBUG_PRINT(("%s:%d: wait DRDY st0 0x%x st1 0x%x\n", device_xname(atac->atac_dev), chp->ch_channel, st0, st1), DEBUG_PROBE); /* Wait a bit, some devices are weird just after a reset. */ delay(5000); for (i = 0; i < chp->ch_ndrives; i++) { #if NATA_DMA /* * Init error counter so that an error within the first xfers * will trigger a downgrade */ chp->ch_drive[i].n_dmaerrs = NERRS_MAX-1; #endif /* If controller can't do 16bit flag the drives as 32bit */ if ((atac->atac_cap & (ATAC_CAP_DATA16 | ATAC_CAP_DATA32)) == ATAC_CAP_DATA32) { ata_channel_lock(chp); chp->ch_drive[i].drive_flags |= ATA_DRIVE_CAP32; ata_channel_unlock(chp); } if (chp->ch_drive[i].drive_type == ATA_DRIVET_NONE) continue; /* Shortcut in case we've been shutdown */ if (chp->ch_flags & ATACH_SHUTDOWN) return; /* * Issue an identify, to try to detect ghosts. * Note that we can't use interrupts here, because if there * is no devices, we will get a command aborted without * interrupts. */ error = ata_get_params(&chp->ch_drive[i], AT_WAIT | AT_POLL, ¶ms); if (error != CMD_OK) { ata_channel_lock(chp); ata_delay(chp, 1000, "atacnf", AT_WAIT); ata_channel_unlock(chp); /* Shortcut in case we've been shutdown */ if (chp->ch_flags & ATACH_SHUTDOWN) return; error = ata_get_params(&chp->ch_drive[i], AT_WAIT | AT_POLL, ¶ms); } if (error != CMD_OK) { ATADEBUG_PRINT(("%s:%d:%d: IDENTIFY failed (%d)\n", device_xname(atac->atac_dev), chp->ch_channel, i, error), DEBUG_PROBE); ata_channel_lock(chp); if (chp->ch_drive[i].drive_type != ATA_DRIVET_ATA || (wdc->cap & WDC_CAPABILITY_PREATA) == 0) { chp->ch_drive[i].drive_type = ATA_DRIVET_NONE; ata_channel_unlock(chp); continue; } /* * Pre-ATA drive ? * Test registers writability (Error register not * writable, but cyllo is), then try an ATA command. */ if (wdc->select) wdc->select(chp,i); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (i << 4)); delay(10); /* 400ns delay */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0, 0x58); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0, 0xa5); if (bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0) == 0x58 || bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0) != 0xa5) { ATADEBUG_PRINT(("%s:%d:%d: register " "writability failed\n", device_xname(atac->atac_dev), chp->ch_channel, i), DEBUG_PROBE); chp->ch_drive[i].drive_type = ATA_DRIVET_NONE; ata_channel_unlock(chp); continue; } if (wdc_wait_for_ready(chp, 10000, 0, &tfd) == WDCWAIT_TOUT) { ATADEBUG_PRINT(("%s:%d:%d: not ready\n", device_xname(atac->atac_dev), chp->ch_channel, i), DEBUG_PROBE); chp->ch_drive[i].drive_type = ATA_DRIVET_NONE; ata_channel_unlock(chp); continue; } bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_command], 0, WDCC_RECAL); delay(10); /* 400ns delay */ if (wdc_wait_for_ready(chp, 10000, 0, &tfd) == WDCWAIT_TOUT) { ATADEBUG_PRINT(("%s:%d:%d: WDCC_RECAL failed\n", device_xname(atac->atac_dev), chp->ch_channel, i), DEBUG_PROBE); chp->ch_drive[i].drive_type = ATA_DRIVET_NONE; ata_channel_unlock(chp); } else { for (j = 0; j < chp->ch_ndrives; j++) { if (chp->ch_drive[i].drive_type != ATA_DRIVET_NONE) { chp->ch_drive[j].drive_type = ATA_DRIVET_OLD; } } ata_channel_unlock(chp); } } } } int wdcprobe(struct wdc_regs *wdr) { struct wdc_softc wdc; struct ata_channel ch; int rv; memset(&wdc, 0, sizeof(wdc)); memset(&ch, 0, sizeof(ch)); ata_channel_init(&ch); ch.ch_atac = &wdc.sc_atac; wdc.regs = wdr; /* default reset method */ if (wdc.reset == NULL) wdc.reset = wdc_do_reset; rv = wdcprobe1(&ch, 1); ata_channel_destroy(&ch); return rv; } static int wdcprobe1(struct ata_channel *chp, int poll) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; u_int8_t st0 = 0, st1 = 0, sc __unused, sn __unused, cl, ch; u_int8_t ret_value = 0x03; u_int8_t drive; /* XXX if poll, wdc_probe_count is 0. */ int wdc_probe_count = poll ? (WDC_PROBE_WAIT / WDCDELAY) : (WDC_PROBE_WAIT * hz); /* * Sanity check to see if the wdc channel responds at all. */ ata_channel_lock(chp); if ((wdc->cap & WDC_CAPABILITY_NO_EXTRA_RESETS) == 0) { while (wdc_probe_count-- > 0) { if (wdc->select) wdc->select(chp,0); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); delay(10); /* 400ns delay */ st0 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); if (wdc->select) wdc->select(chp,1); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | 0x10); delay(10); /* 400ns delay */ st1 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); if ((st0 & WDCS_BSY) == 0) break; } ATADEBUG_PRINT(("%s:%d: before reset, st0=0x%x, st1=0x%x\n", __func__, chp->ch_channel, st0, st1), DEBUG_PROBE); if (st0 == 0xff || st0 == WDSD_IBM) ret_value &= ~0x01; if (st1 == 0xff || st1 == (WDSD_IBM | 0x10)) ret_value &= ~0x02; /* Register writability test, drive 0. */ if (ret_value & 0x01) { if (wdc->select) wdc->select(chp,0); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0, 0x02); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); if (cl != 0x02) { ATADEBUG_PRINT(("%s:%d drive 0 wd_cyl_lo: " "got 0x%x != 0x02\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x01; } bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0, 0x01); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); if (cl != 0x01) { ATADEBUG_PRINT(("%s:%d drive 0 wd_cyl_lo: " "got 0x%x != 0x01\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x01; } bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0, 0x01); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); if (cl != 0x01) { ATADEBUG_PRINT(("%s:%d drive 0 wd_sector: " "got 0x%x != 0x01\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x01; } bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0, 0x02); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); if (cl != 0x02) { ATADEBUG_PRINT(("%s:%d drive 0 wd_sector: " "got 0x%x != 0x02\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x01; } cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); if (cl != 0x01) { ATADEBUG_PRINT(("%s:%d drive 0 wd_cyl_lo(2): " "got 0x%x != 0x01\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x01; } } /* Register writability test, drive 1. */ if (ret_value & 0x02) { if (wdc->select) wdc->select(chp,1); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | 0x10); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0, 0x02); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); if (cl != 0x02) { ATADEBUG_PRINT(("%s:%d drive 1 wd_cyl_lo: " "got 0x%x != 0x02\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x02; } bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0, 0x01); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); if (cl != 0x01) { ATADEBUG_PRINT(("%s:%d drive 1 wd_cyl_lo: " "got 0x%x != 0x01\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x02; } bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0, 0x01); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); if (cl != 0x01) { ATADEBUG_PRINT(("%s:%d drive 1 wd_sector: " "got 0x%x != 0x01\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x02; } bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0, 0x02); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); if (cl != 0x02) { ATADEBUG_PRINT(("%s:%d drive 1 wd_sector: " "got 0x%x != 0x02\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x02; } cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); if (cl != 0x01) { ATADEBUG_PRINT(("%s:%d drive 1 wd_cyl_lo(2): " "got 0x%x != 0x01\n", __func__, chp->ch_channel, cl), DEBUG_PROBE); ret_value &= ~0x02; } } if (ret_value == 0) { ata_channel_unlock(chp); return 0; } } #if 0 /* XXX this break some ATA or ATAPI devices */ /* * reset bus. Also send an ATAPI_RESET to devices, in case there are * ATAPI device out there which don't react to the bus reset */ if (ret_value & 0x01) { if (wdc->select) wdc->select(chp,0); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_command], 0, ATAPI_SOFT_RESET); } if (ret_value & 0x02) { if (wdc->select) wdc->select(chp,0); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | 0x10); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_command], 0, ATAPI_SOFT_RESET); } delay(5000); #endif wdc->reset(chp, RESET_POLL); DELAY(2000); (void) bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0); if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); #ifdef WDC_NO_IDS ret_value = __wdcwait_reset(chp, ret_value, RESET_POLL); #else ret_value = __wdcwait_reset(chp, ret_value, poll); #endif ATADEBUG_PRINT(("%s:%d: after reset, ret_value=%#x\n", __func__, chp->ch_channel, ret_value), DEBUG_PROBE); /* if reset failed, there's nothing here */ if (ret_value == 0) { ata_channel_unlock(chp); 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 < wdc->wdc_maxdrives; drive++) { if ((ret_value & (0x01 << drive)) == 0) continue; if (wdc->select) wdc->select(chp,drive); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (drive << 4)); delay(10); /* 400ns delay */ /* Save registers contents */ sc = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0); sn = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); cl = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); ch = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0); ATADEBUG_PRINT(("%s:%d:%d: after reset, sc=0x%x sn=0x%x " "cl=0x%x ch=0x%x\n", __func__, chp->ch_channel, drive, sc, sn, cl, ch), DEBUG_PROBE); /* * sc & sn are supposed to be 0x1 for ATAPI but in some cases * we get wrong values here, so ignore it. */ if (chp->ch_drive != NULL) { if (cl == 0x14 && ch == 0xeb) { chp->ch_drive[drive].drive_type = ATA_DRIVET_ATAPI; } else { chp->ch_drive[drive].drive_type = ATA_DRIVET_ATA; } } } /* * Select an existing drive before lowering spl, some WDC_NO_IDS * devices incorrectly assert IRQ on nonexistent slave */ if (ret_value & 0x01) { bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); (void)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); } ata_channel_unlock(chp); return (ret_value); } void wdcattach(struct ata_channel *chp) { struct atac_softc *atac = chp->ch_atac; struct wdc_softc *wdc = CHAN_TO_WDC(chp); KASSERT(wdc->wdc_maxdrives > 0 && wdc->wdc_maxdrives <= WDC_MAXDRIVES); /* default data transfer methods */ if (wdc->datain_pio == NULL) wdc->datain_pio = wdc_datain_pio; if (wdc->dataout_pio == NULL) wdc->dataout_pio = wdc_dataout_pio; /* default reset method */ if (wdc->reset == NULL) wdc->reset = wdc_do_reset; /* initialise global data */ if (atac->atac_bustype_ata == NULL) atac->atac_bustype_ata = &wdc_ata_bustype; if (atac->atac_probe == NULL) atac->atac_probe = wdc_drvprobe; #if NATAPIBUS > 0 if (atac->atac_atapibus_attach == NULL) atac->atac_atapibus_attach = wdc_atapibus_attach; #endif ata_channel_attach(chp); } void wdc_childdetached(device_t self, device_t child) { struct atac_softc *atac = device_private(self); struct ata_channel *chp; int i; for (i = 0; i < atac->atac_nchannels; i++) { chp = atac->atac_channels[i]; if (child == chp->atabus) { chp->atabus = NULL; return; } } } int wdcdetach(device_t self, int flags) { struct atac_softc *atac = device_private(self); struct ata_channel *chp; struct scsipi_adapter *adapt = &atac->atac_atapi_adapter._generic; int i, error = 0; for (i = 0; i < atac->atac_nchannels; i++) { chp = atac->atac_channels[i]; if (chp->atabus == NULL) continue; ATADEBUG_PRINT(("wdcdetach: %s: detaching %s\n", device_xname(atac->atac_dev), device_xname(chp->atabus)), DEBUG_DETACH); if ((error = config_detach(chp->atabus, flags)) != 0) return error; ata_channel_detach(chp); } if (adapt->adapt_refcnt != 0) return EBUSY; return 0; } /* restart an interrupted I/O */ void wdcrestart(void *v) { struct ata_channel *chp = v; int s; s = splbio(); atastart(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(void *arg) { struct ata_channel *chp = arg; struct atac_softc *atac = chp->ch_atac; struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; struct ata_xfer *xfer; int ret; if (!device_is_active(atac->atac_dev)) { ATADEBUG_PRINT(("wdcintr: deactivated controller\n"), DEBUG_INTR); return (0); } if ((chp->ch_flags & ATACH_IRQ_WAIT) == 0) { ATADEBUG_PRINT(("wdcintr: irq not expected\n"), DEBUG_INTR); goto ignore; } xfer = ata_queue_get_active_xfer(chp); if (xfer == NULL) { ATADEBUG_PRINT(("wdcintr: inactive controller\n"), DEBUG_INTR); ignore: /* try to clear the pending interrupt anyway */ (void)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); return (0); } /* * On some controllers (e.g. some PCI-IDE) setting the WDCTL_IDS bit * actually has no effect, and interrupt is triggered regardless. * Ignore polled commands here, they are processed separately. */ if (ISSET(xfer->c_flags, C_POLL)) { ATADEBUG_PRINT(("%s: polled xfer ignored\n", __func__), DEBUG_INTR); goto ignore; } ATADEBUG_PRINT(("wdcintr\n"), DEBUG_INTR); KASSERT(xfer != NULL); #if NATA_DMA || NATA_PIOBM if (chp->ch_flags & ATACH_DMA_WAIT) { wdc->dma_status = (*wdc->dma_finish)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, WDC_DMAEND_END); if (wdc->dma_status & WDC_DMAST_NOIRQ) { /* IRQ not for us, not detected by DMA engine */ return 0; } chp->ch_flags &= ~ATACH_DMA_WAIT; } #endif chp->ch_flags &= ~ATACH_IRQ_WAIT; KASSERT(xfer->ops != NULL && xfer->ops->c_intr != NULL); ret = xfer->ops->c_intr(chp, xfer, 1); if (ret == 0) /* irq was not for us, still waiting for irq */ chp->ch_flags |= ATACH_IRQ_WAIT; return (ret); } /* Put all disk in RESET state */ void wdc_reset_drive(struct ata_drive_datas *drvp, int flags, uint32_t *sigp) { struct ata_channel *chp = drvp->chnl_softc; ata_channel_lock_owned(chp); KASSERT(sigp == NULL); ATADEBUG_PRINT(("wdc_reset_drive %s:%d for drive %d\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, drvp->drive), DEBUG_FUNCS); ata_thread_run(chp, flags, ATACH_TH_RESET, ATACH_NODRIVE); } void wdc_reset_channel(struct ata_channel *chp, int flags) { struct ata_xfer *xfer; ata_channel_lock_owned(chp); #if NATA_DMA || NATA_PIOBM struct wdc_softc *wdc = CHAN_TO_WDC(chp); #endif chp->ch_flags &= ~ATACH_IRQ_WAIT; /* * if the current command is on an ATAPI device, issue a * ATAPI_SOFT_RESET */ xfer = ata_queue_get_active_xfer_locked(chp); if (xfer && xfer->c_chp == chp && (xfer->c_flags & C_ATAPI)) { wdccommandshort(chp, xfer->c_drive, ATAPI_SOFT_RESET); ata_delay(chp, 1000, "atardl", flags); } /* reset the channel */ if (flags & AT_WAIT) (void) wdcreset(chp, RESET_SLEEP); else (void) wdcreset(chp, RESET_POLL); /* * wait a bit after reset; in case the DMA engines needs some time * to recover. */ ata_delay(chp, 1000, "atardl", flags); /* * Look for pending xfers. If we have a shared queue, we'll also reset * the other channel if the current xfer is running on it. * Then we'll kill the eventual active transfer explicitely, so that * it is queued for retry immediatelly without waiting for I/O timeout. */ if (xfer) { if (xfer->c_chp != chp) { ata_thread_run(xfer->c_chp, flags, ATACH_TH_RESET, ATACH_NODRIVE); } else { #if NATA_DMA || NATA_PIOBM /* * If we're waiting for DMA, stop the * DMA engine */ if (chp->ch_flags & ATACH_DMA_WAIT) { (*wdc->dma_finish)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, WDC_DMAEND_ABRT_QUIET); chp->ch_flags &= ~ATACH_DMA_WAIT; } #endif } } ata_kill_active(chp, KILL_RESET, flags); } static int wdcreset(struct ata_channel *chp, int poll) { struct atac_softc *atac = chp->ch_atac; struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; int drv_mask1, drv_mask2; ata_channel_lock_owned(chp); #ifdef WDC_NO_IDS poll = RESET_POLL; #endif wdc->reset(chp, poll); drv_mask1 = (chp->ch_drive[0].drive_type != ATA_DRIVET_NONE) ? 0x01 : 0x00; if (chp->ch_ndrives > 1) drv_mask1 |= (chp->ch_drive[1].drive_type != ATA_DRIVET_NONE) ? 0x02 : 0x00; drv_mask2 = __wdcwait_reset(chp, drv_mask1, (poll == RESET_SLEEP) ? 0 : 1); if (drv_mask2 != drv_mask1) { aprint_error("%s channel %d: reset failed for", device_xname(atac->atac_dev), chp->ch_channel); if ((drv_mask1 & 0x01) != 0 && (drv_mask2 & 0x01) == 0) aprint_normal(" drive 0"); if ((drv_mask1 & 0x02) != 0 && (drv_mask2 & 0x02) == 0) aprint_normal(" drive 1"); aprint_normal("\n"); } if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); return (drv_mask1 != drv_mask2) ? 1 : 0; } void wdc_do_reset(struct ata_channel *chp, int poll) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; int s = 0; if (poll != RESET_SLEEP) s = splbio(); if (wdc->select) wdc->select(chp,0); /* master */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); delay(10); /* 400ns delay */ /* assert SRST, wait for reset to complete */ if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) { bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_RST | WDCTL_IDS | WDCTL_4BIT); delay(2000); } (void) bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0); if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT | WDCTL_IDS); delay(10); /* 400ns delay */ if (poll != RESET_SLEEP) { /* ACK interrupt in case there is one pending left */ if (wdc->irqack) wdc->irqack(chp); splx(s); } } static int __wdcwait_reset(struct ata_channel *chp, int drv_mask, int poll) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; int timeout, nloop; int wflags = poll ? AT_POLL : AT_WAIT; u_int8_t st0 = 0, st1 = 0; #ifdef ATADEBUG u_int8_t sc0 = 0, sn0 = 0, cl0 = 0, ch0 = 0; u_int8_t sc1 = 0, sn1 = 0, cl1 = 0, ch1 = 0; #endif if (poll) nloop = WDCNDELAY_RST; else nloop = WDC_RESET_WAIT * hz / 1000; /* wait for BSY to deassert */ for (timeout = 0; timeout < nloop; timeout++) { if ((drv_mask & 0x01) != 0) { if (wdc->select) wdc->select(chp,0); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM); /* master */ delay(10); st0 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); #ifdef ATADEBUG sc0 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0); sn0 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); cl0 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); ch0 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0); #endif } if ((drv_mask & 0x02) != 0) { if (wdc->select) wdc->select(chp,1); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | 0x10); /* slave */ delay(10); st1 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); #ifdef ATADEBUG sc1 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0); sn1 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0); cl1 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0); ch1 = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0); #endif } 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; } if ((drv_mask & 0x02) == 0) { /* No master, no slave: 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; } } ata_delay(chp, WDCDELAY, "atarst", wflags); } /* Reset timed out. Maybe it's because drv_mask was not right */ if (st0 & WDCS_BSY) drv_mask &= ~0x01; if (st1 & WDCS_BSY) drv_mask &= ~0x02; end: ATADEBUG_PRINT(("%s:%d:0: after reset, sc=0x%x sn=0x%x " "cl=0x%x ch=0x%x\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, sc0, sn0, cl0, ch0), DEBUG_PROBE); ATADEBUG_PRINT(("%s:%d:1: after reset, sc=0x%x sn=0x%x " "cl=0x%x ch=0x%x\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, sc1, sn1, cl1, ch1), DEBUG_PROBE); ATADEBUG_PRINT(("%s:%d: wdcwait_reset() end, st0=0x%x st1=0x%x\n", device_xname(chp->ch_atac->atac_dev), chp->ch_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. */ static int __wdcwait(struct ata_channel *chp, int mask, int bits, int timeout, int *tfd) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; u_char status, error = 0; int xtime = 0; int rv; ATADEBUG_PRINT(("__wdcwait %s:%d\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel), DEBUG_STATUS); *tfd = 0; timeout = timeout * 1000 / WDCDELAY; /* delay uses microseconds */ for (;;) { status = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); if ((status & (WDCS_BSY | mask)) == bits) break; if (++xtime > timeout) { ATADEBUG_PRINT(("__wdcwait: timeout (time=%d), " "status %x error %x (mask 0x%x bits 0x%x)\n", xtime, status, bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0), mask, bits), DEBUG_STATUS | DEBUG_PROBE | DEBUG_DELAY); rv = WDCWAIT_TOUT; goto out; } delay(WDCDELAY); } #ifdef ATADEBUG if (xtime > 0 && (atadebug_mask & DEBUG_DELAY)) printf("__wdcwait: did busy-wait, time=%d\n", xtime); #endif if (status & WDCS_ERR) error = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0); #ifdef WDCNDELAY_DEBUG /* After autoconfig, there should be no long delays. */ if (!cold && xtime > WDCNDELAY_DEBUG) { struct ata_xfer *xfer; xfer = ata_queue_get_active_xfer(chp); if (xfer == NULL) printf("%s channel %d: warning: busy-wait took %dus\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, WDCDELAY * xtime); else printf("%s:%d:%d: warning: busy-wait took %dus\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, xfer->c_drive, WDCDELAY * xtime); } #endif rv = WDCWAIT_OK; out: *tfd = ATACH_ERR_ST(error, status); return rv; } /* * Call __wdcwait(), polling using kpause() or waking up the kernel * thread if possible */ int wdcwait(struct ata_channel *chp, int mask, int bits, int timeout, int flags, int *tfd) { int error, i, timeout_hz = mstohz(timeout); ata_channel_lock_owned(chp); if (timeout_hz == 0 || (flags & (AT_WAIT | AT_POLL)) == AT_POLL) error = __wdcwait(chp, mask, bits, timeout, tfd); else { error = __wdcwait(chp, mask, bits, WDCDELAY_POLL, tfd); if (error != 0) { if ((chp->ch_flags & ATACH_TH_RUN) || (flags & AT_WAIT)) { /* * we're running in the channel thread * or some userland thread context */ for (i = 0; i < timeout_hz; i++) { if (__wdcwait(chp, mask, bits, WDCDELAY_POLL, tfd) == 0) { error = 0; break; } kpause("atapoll", true, 1, &chp->ch_lock); } } else { /* * we're probably in interrupt context, * caller must ask the thread to come back here */ return(WDCWAIT_THR); } } } return (error); } #if NATA_DMA /* * Busy-wait for DMA to complete */ int wdc_dmawait(struct ata_channel *chp, struct ata_xfer *xfer, int timeout) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); int xtime; for (xtime = 0; xtime < timeout * 1000 / WDCDELAY; xtime++) { wdc->dma_status = (*wdc->dma_finish)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, WDC_DMAEND_END); if ((wdc->dma_status & WDC_DMAST_NOIRQ) == 0) return 0; delay(WDCDELAY); } /* timeout, force a DMA halt */ wdc->dma_status = (*wdc->dma_finish)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, WDC_DMAEND_ABRT); return 1; } #endif void wdctimeout(void *arg) { struct ata_xfer *xfer; struct ata_channel *chp = arg; #if NATA_DMA || NATA_PIOBM struct wdc_softc *wdc = CHAN_TO_WDC(chp); #endif int s; ATADEBUG_PRINT(("wdctimeout\n"), DEBUG_FUNCS); s = splbio(); callout_ack(&chp->c_timo_callout); xfer = ata_queue_get_active_xfer(chp); KASSERT(xfer != NULL); if (ata_timo_xfer_check(xfer)) { /* Already logged */ goto out; } __wdcerror(chp, "lost interrupt"); printf("\ttype: %s tc_bcount: %d tc_skip: %d\n", (xfer->c_flags & C_ATAPI) ? "atapi" : "ata", xfer->c_bcount, xfer->c_skip); #if NATA_DMA || NATA_PIOBM if (chp->ch_flags & ATACH_DMA_WAIT) { wdc->dma_status = (*wdc->dma_finish)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, WDC_DMAEND_ABRT); chp->ch_flags &= ~ATACH_DMA_WAIT; } #endif /* * Call the interrupt routine. If we just missed an interrupt, * it will do what's needed. Else, it will take the needed * action (reset the device). * Before that we need to reinstall the timeout callback, * in case it will miss another irq while in this transfer * We arbitray chose it to be 1s */ callout_reset(&chp->c_timo_callout, hz, wdctimeout, chp); xfer->c_flags |= C_TIMEOU; KASSERT(xfer->ops != NULL && xfer->ops->c_intr != NULL); xfer->ops->c_intr(chp, xfer, 1); out: splx(s); } static const struct ata_xfer_ops wdc_cmd_xfer_ops = { .c_start = __wdccommand_start, .c_poll = __wdccommand_poll, .c_abort = __wdccommand_done, .c_intr = __wdccommand_intr, .c_kill_xfer = __wdccommand_kill_xfer, }; int wdc_exec_command(struct ata_drive_datas *drvp, struct ata_xfer *xfer) { struct ata_channel *chp = drvp->chnl_softc; struct ata_command *ata_c = &xfer->c_ata_c; int s, ret; ATADEBUG_PRINT(("wdc_exec_command %s:%d:%d\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, drvp->drive), DEBUG_FUNCS); /* set up an xfer and queue. Wait for completion */ if (chp->ch_atac->atac_cap & ATAC_CAP_NOIRQ) ata_c->flags |= AT_POLL; if (ata_c->flags & AT_POLL) xfer->c_flags |= C_POLL; if (ata_c->flags & AT_WAIT) xfer->c_flags |= C_WAIT; xfer->c_drive = drvp->drive; xfer->c_databuf = ata_c->data; xfer->c_bcount = ata_c->bcount; xfer->ops = &wdc_cmd_xfer_ops; s = splbio(); ata_exec_xfer(chp, xfer); #ifdef DIAGNOSTIC if ((ata_c->flags & AT_POLL) != 0 && (ata_c->flags & AT_DONE) == 0) panic("wdc_exec_command: polled command not done"); #endif if (ata_c->flags & AT_DONE) { ret = ATACMD_COMPLETE; } else { if (ata_c->flags & AT_WAIT) { ata_wait_cmd(chp, xfer); ret = ATACMD_COMPLETE; } else { ret = ATACMD_QUEUED; } } splx(s); return ret; } static int __wdccommand_start(struct ata_channel *chp, struct ata_xfer *xfer) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; int drive = xfer->c_drive; int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; struct ata_command *ata_c = &xfer->c_ata_c; int tfd; ATADEBUG_PRINT(("__wdccommand_start %s:%d:%d\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, xfer->c_drive), DEBUG_FUNCS); if (wdc->select) wdc->select(chp,drive); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (drive << 4)); switch(wdcwait(chp, ata_c->r_st_bmask | WDCS_DRQ, ata_c->r_st_bmask, ata_c->timeout, wait_flags, &tfd)) { case WDCWAIT_OK: break; case WDCWAIT_TOUT: ata_c->flags |= AT_TIMEOU; return ATASTART_ABORT; case WDCWAIT_THR: return ATASTART_TH; } if (ata_c->flags & AT_POLL) { /* polled command, disable interrupts */ if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT | WDCTL_IDS); } if ((ata_c->flags & AT_LBA48) != 0) { wdccommandext(chp, drive, ata_c->r_command, ata_c->r_lba, ata_c->r_count, ata_c->r_features, ata_c->r_device & ~0x10); } else { wdccommand(chp, drive, ata_c->r_command, (ata_c->r_lba >> 8) & 0xffff, WDSD_IBM | (drive << 4) | (((ata_c->flags & AT_LBA) != 0) ? WDSD_LBA : 0) | ((ata_c->r_lba >> 24) & 0x0f), ata_c->r_lba & 0xff, ata_c->r_count & 0xff, ata_c->r_features & 0xff); } if ((ata_c->flags & AT_POLL) == 0) { chp->ch_flags |= ATACH_IRQ_WAIT; /* wait for interrupt */ callout_reset(&chp->c_timo_callout, ata_c->timeout / 1000 * hz, wdctimeout, chp); return ATASTART_STARTED; } /* * Polled command. Wait for drive ready or drq. Done in intr(). * Wait for at last 400ns for status bit to be valid. */ delay(10); /* 400ns delay */ return ATASTART_POLL; } static void __wdccommand_poll(struct ata_channel *chp, struct ata_xfer *xfer) { __wdccommand_intr(chp, xfer, 0); } static int __wdccommand_intr(struct ata_channel *chp, struct ata_xfer *xfer, int irq) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; struct ata_command *ata_c = &xfer->c_ata_c; int bcount = ata_c->bcount; char *data = ata_c->data; int wflags, tfd; int drive_flags; if (ata_c->r_command == WDCC_IDENTIFY || ata_c->r_command == ATAPI_IDENTIFY_DEVICE) { /* * The IDENTIFY data has been designed as an array of * u_int16_t, so we can byteswap it on the fly. * Historically it's what we have always done so keeping it * here ensure binary backward compatibility. */ drive_flags = ATA_DRIVE_NOSTREAM | chp->ch_drive[xfer->c_drive].drive_flags; } else { /* * Other data structure are opaque and should be transfered * as is. */ drive_flags = chp->ch_drive[xfer->c_drive].drive_flags; } #ifdef WDC_NO_IDS wflags = AT_POLL; #else if ((ata_c->flags & (AT_WAIT | AT_POLL)) == (AT_WAIT | AT_POLL)) { /* both wait and poll, we can kpause here */ wflags = AT_WAIT | AT_POLL; } else { wflags = AT_POLL; } #endif ata_channel_lock(chp); again: ATADEBUG_PRINT(("__wdccommand_intr %s:%d:%d\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, xfer->c_drive), DEBUG_INTR); /* * after a ATAPI_SOFT_RESET, the device will have released the bus. * Reselect again, it doesn't hurt for others commands, and the time * penalty for the extra register write is acceptable, * wdc_exec_command() isn't called often (mostly for autoconfig) */ if ((xfer->c_flags & C_ATAPI) != 0) { bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (xfer->c_drive << 4)); } if ((ata_c->flags & AT_XFDONE) != 0) { /* * We have completed a data xfer. The drive should now be * in its initial state */ if (wdcwait(chp, ata_c->r_st_bmask | WDCS_DRQ, ata_c->r_st_bmask, (irq == 0) ? ata_c->timeout : 0, wflags, &tfd) == WDCWAIT_TOUT) { if (irq && (xfer->c_flags & C_TIMEOU) == 0) { ata_channel_unlock(chp); return 0; /* IRQ was not for us */ } ata_c->flags |= AT_TIMEOU; } goto out; } if (wdcwait(chp, ata_c->r_st_pmask, ata_c->r_st_pmask, (irq == 0) ? ata_c->timeout : 0, wflags, &tfd) == WDCWAIT_TOUT) { if (irq && (xfer->c_flags & C_TIMEOU) == 0) { ata_channel_unlock(chp); return 0; /* IRQ was not for us */ } ata_c->flags |= AT_TIMEOU; goto out; } if (wdc->irqack) wdc->irqack(chp); if (ata_c->flags & AT_READ) { if ((ATACH_ST(tfd) & WDCS_DRQ) == 0) { ata_c->flags |= AT_TIMEOU; goto out; } wdc->datain_pio(chp, drive_flags, data, bcount); /* at this point the drive should be in its initial state */ ata_c->flags |= AT_XFDONE; /* * XXX checking the status register again here cause some * hardware to timeout. */ } else if (ata_c->flags & AT_WRITE) { if ((ATACH_ST(tfd) & WDCS_DRQ) == 0) { ata_c->flags |= AT_TIMEOU; goto out; } wdc->dataout_pio(chp, drive_flags, data, bcount); ata_c->flags |= AT_XFDONE; if ((ata_c->flags & AT_POLL) == 0) { chp->ch_flags |= ATACH_IRQ_WAIT; /* wait for interrupt */ callout_reset(&chp->c_timo_callout, mstohz(ata_c->timeout), wdctimeout, chp); ata_channel_unlock(chp); return 1; } else { goto again; } } out: if (ATACH_ST(tfd) & WDCS_DWF) ata_c->flags |= AT_DF; if (ATACH_ST(tfd) & WDCS_ERR) { ata_c->flags |= AT_ERROR; ata_c->r_error = ATACH_ST(tfd); } ata_channel_unlock(chp); __wdccommand_done(chp, xfer); return 1; } static void __wdccommand_done(struct ata_channel *chp, struct ata_xfer *xfer) { struct atac_softc *atac = chp->ch_atac; struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; struct ata_command *ata_c = &xfer->c_ata_c; bool start = true; ATADEBUG_PRINT(("__wdccommand_done %s:%d:%d flags 0x%x\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, ata_c->flags), DEBUG_FUNCS); if (ata_waitdrain_xfer_check(chp, xfer)) { start = false; goto out; } if ((ata_c->flags & AT_READREG) != 0 && device_is_active(atac->atac_dev) && (ata_c->flags & (AT_ERROR | AT_DF)) == 0) { ata_c->r_status = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); ata_c->r_error = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0); ata_c->r_count = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0); ata_c->r_lba = (uint64_t)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0) << 0; ata_c->r_lba |= (uint64_t)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0) << 8; ata_c->r_lba |= (uint64_t)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0) << 16; ata_c->r_device = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0); if ((ata_c->flags & AT_LBA48) != 0) { if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) { if ((ata_c->flags & AT_POLL) != 0) bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_HOB|WDCTL_4BIT|WDCTL_IDS); else bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_HOB|WDCTL_4BIT); } ata_c->r_count |= bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0) << 8; ata_c->r_lba |= (uint64_t)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0) << 24; ata_c->r_lba |= (uint64_t)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0) << 32; ata_c->r_lba |= (uint64_t)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0) << 40; if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) { if ((ata_c->flags & AT_POLL) != 0) bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT|WDCTL_IDS); else bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); } } else { ata_c->r_lba |= (uint64_t)(ata_c->r_device & 0x0f) << 24; } ata_c->r_device &= 0xf0; } __wdccommand_done_end(chp, xfer); ata_deactivate_xfer(chp, xfer); out: if (ata_c->flags & AT_POLL) { /* enable interrupts */ if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); delay(10); /* some drives need a little delay here */ } if (start) atastart(chp); } static void __wdccommand_done_end(struct ata_channel *chp, struct ata_xfer *xfer) { struct ata_command *ata_c = &xfer->c_ata_c; ata_c->flags |= AT_DONE; } static void __wdccommand_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer, int reason) { struct ata_command *ata_c = &xfer->c_ata_c; bool deactivate = true; switch (reason) { case KILL_GONE_INACTIVE: deactivate = false; /* FALLTHROUGH */ case KILL_GONE: ata_c->flags |= AT_GONE; break; case KILL_RESET: ata_c->flags |= AT_RESET; break; default: printf("__wdccommand_kill_xfer: unknown reason %d\n", reason); panic("__wdccommand_kill_xfer"); } __wdccommand_done_end(chp, xfer); if (deactivate) ata_deactivate_xfer(chp, xfer); } /* * Send a command. The drive should be ready. * Assumes interrupts are blocked. */ void wdccommand(struct ata_channel *chp, u_int8_t drive, u_int8_t command, u_int16_t cylin, u_int8_t head, u_int8_t sector, u_int8_t count, u_int8_t features) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; ATADEBUG_PRINT(("wdccommand %s:%d:%d: command=0x%x cylin=%d head=%d " "sector=%d count=%d features=%d\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, drive, command, cylin, head, sector, count, features), DEBUG_FUNCS); if (wdc->select) wdc->select(chp,drive); /* Select drive, head, and addressing mode. */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (drive << 4) | head); /* Load parameters into the wd_features register. */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_features], 0, features); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0, count); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sector], 0, sector); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0, cylin); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0, cylin >> 8); /* Send command. */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_command], 0, command); return; } /* * Send a 48-bit addressing command. The drive should be ready. * Assumes interrupts are blocked. */ void wdccommandext(struct ata_channel *chp, u_int8_t drive, u_int8_t command, u_int64_t blkno, u_int16_t count, u_int16_t features, u_int8_t device) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; ATADEBUG_PRINT(("wdccommandext %s:%d:%d: command=0x%02x " "blkno=0x%012"PRIx64" count=0x%04x features=0x%04x " "device=0x%02x\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, drive, command, blkno, count, features, device), DEBUG_FUNCS); KASSERT(drive < wdc->wdc_maxdrives); if (wdc->select) wdc->select(chp,drive); /* Select drive, head, and addressing mode. */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, (drive << 4) | device); if (wdc->cap & WDC_CAPABILITY_WIDEREGS) { bus_space_write_2(wdr->cmd_iot, wdr->cmd_iohs[wd_features], 0, features); bus_space_write_2(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0, count); bus_space_write_2(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_lo], 0, (((blkno >> 16) & 0xff00) | (blkno & 0x00ff))); bus_space_write_2(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_mi], 0, (((blkno >> 24) & 0xff00) | ((blkno >> 8) & 0x00ff))); bus_space_write_2(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_hi], 0, (((blkno >> 32) & 0xff00) | ((blkno >> 16) & 0x00ff))); } else { /* previous */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_features], 0, features >> 8); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0, count >> 8); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_lo], 0, blkno >> 24); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_mi], 0, blkno >> 32); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_hi], 0, blkno >> 40); /* current */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_features], 0, features); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_seccnt], 0, count); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_lo], 0, blkno); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_mi], 0, blkno >> 8); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_lba_hi], 0, blkno >> 16); } /* Send command. */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_command], 0, command); return; } /* * Simplified version of wdccommand(). Unbusy/ready/drq must be * tested by the caller. */ void wdccommandshort(struct ata_channel *chp, int drive, int command) { struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; ATADEBUG_PRINT(("wdccommandshort %s:%d:%d command 0x%x\n", device_xname(chp->ch_atac->atac_dev), chp->ch_channel, drive, command), DEBUG_FUNCS); if (wdc->select) wdc->select(chp,drive); /* Select drive. */ bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (drive << 4)); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_command], 0, command); } static void __wdcerror(struct ata_channel *chp, const char *msg) { struct atac_softc *atac = chp->ch_atac; struct ata_xfer *xfer = ata_queue_get_active_xfer(chp); if (xfer == NULL) aprint_error("%s:%d: %s\n", device_xname(atac->atac_dev), chp->ch_channel, msg); else aprint_error("%s:%d:%d: %s\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, msg); } /* * the bit bucket */ void wdcbit_bucket(struct ata_channel *chp, int size) { struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp); for (; size >= 2; size -= 2) (void)bus_space_read_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0); if (size) (void)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0); } static void wdc_datain_pio(struct ata_channel *chp, int flags, void *bf, size_t len) { struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp); #ifndef __NO_STRICT_ALIGNMENT if ((uintptr_t)bf & 1) goto unaligned; if ((flags & ATA_DRIVE_CAP32) && ((uintptr_t)bf & 3)) goto unaligned; #endif if (flags & ATA_DRIVE_NOSTREAM) { if ((flags & ATA_DRIVE_CAP32) && len > 3) { bus_space_read_multi_4(wdr->data32iot, wdr->data32ioh, 0, bf, len >> 2); bf = (char *)bf + (len & ~3); len &= 3; } if (len > 1) { bus_space_read_multi_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, bf, len >> 1); bf = (char *)bf + (len & ~1); len &= 1; } } else { if ((flags & ATA_DRIVE_CAP32) && len > 3) { bus_space_read_multi_stream_4(wdr->data32iot, wdr->data32ioh, 0, bf, len >> 2); bf = (char *)bf + (len & ~3); len &= 3; } if (len > 1) { bus_space_read_multi_stream_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, bf, len >> 1); bf = (char *)bf + (len & ~1); len &= 1; } } if (len) *((uint8_t *)bf) = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0); return; #ifndef __NO_STRICT_ALIGNMENT unaligned: if (flags & ATA_DRIVE_NOSTREAM) { if (flags & ATA_DRIVE_CAP32) { while (len > 3) { uint32_t val; val = bus_space_read_4(wdr->data32iot, wdr->data32ioh, 0); memcpy(bf, &val, 4); bf = (char *)bf + 4; len -= 4; } } while (len > 1) { uint16_t val; val = bus_space_read_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0); memcpy(bf, &val, 2); bf = (char *)bf + 2; len -= 2; } } else { if (flags & ATA_DRIVE_CAP32) { while (len > 3) { uint32_t val; val = bus_space_read_stream_4(wdr->data32iot, wdr->data32ioh, 0); memcpy(bf, &val, 4); bf = (char *)bf + 4; len -= 4; } } while (len > 1) { uint16_t val; val = bus_space_read_stream_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0); memcpy(bf, &val, 2); bf = (char *)bf + 2; len -= 2; } } #endif } static void wdc_dataout_pio(struct ata_channel *chp, int flags, void *bf, size_t len) { struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp); #ifndef __NO_STRICT_ALIGNMENT if ((uintptr_t)bf & 1) goto unaligned; if ((flags & ATA_DRIVE_CAP32) && ((uintptr_t)bf & 3)) goto unaligned; #endif if (flags & ATA_DRIVE_NOSTREAM) { if (flags & ATA_DRIVE_CAP32) { bus_space_write_multi_4(wdr->data32iot, wdr->data32ioh, 0, bf, len >> 2); bf = (char *)bf + (len & ~3); len &= 3; } if (len) { bus_space_write_multi_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, bf, len >> 1); } } else { if (flags & ATA_DRIVE_CAP32) { bus_space_write_multi_stream_4(wdr->data32iot, wdr->data32ioh, 0, bf, len >> 2); bf = (char *)bf + (len & ~3); len &= 3; } if (len) { bus_space_write_multi_stream_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, bf, len >> 1); } } return; #ifndef __NO_STRICT_ALIGNMENT unaligned: if (flags & ATA_DRIVE_NOSTREAM) { if (flags & ATA_DRIVE_CAP32) { while (len > 3) { uint32_t val; memcpy(&val, bf, 4); bus_space_write_4(wdr->data32iot, wdr->data32ioh, 0, val); bf = (char *)bf + 4; len -= 4; } } while (len > 1) { uint16_t val; memcpy(&val, bf, 2); bus_space_write_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, val); bf = (char *)bf + 2; len -= 2; } } else { if (flags & ATA_DRIVE_CAP32) { while (len > 3) { uint32_t val; memcpy(&val, bf, 4); bus_space_write_stream_4(wdr->data32iot, wdr->data32ioh, 0, val); bf = (char *)bf + 4; len -= 4; } } while (len > 1) { uint16_t val; memcpy(&val, bf, 2); bus_space_write_stream_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, val); bf = (char *)bf + 2; len -= 2; } } #endif }