1879 lines
43 KiB
C
1879 lines
43 KiB
C
/* $NecBSD: nsp.c,v 1.21.12.6 2001/06/29 06:27:52 honda Exp $ */
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/* $NetBSD$ */
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#define NSP_DEBUG
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#define NSP_STATICS
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#define NSP_IO_CONTROL_FLAGS \
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(NSP_READ_SUSPEND_IO | NSP_WRITE_SUSPEND_IO | \
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NSP_READ_FIFO_INTERRUPTS | NSP_WRITE_FIFO_INTERRUPTS | \
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NSP_USE_MEMIO | NSP_WAIT_FOR_SELECT)
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/*-
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* Copyright (c) 1998, 1999, 2000, 2001
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* NetBSD/pc98 porting staff. All rights reserved.
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*
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* Copyright (c) 1998, 1999, 2000, 2001
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* Naofumi HONDA. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/queue.h>
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#include <sys/malloc.h>
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#include <sys/errno.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <cam/scsi/scsi_low.h>
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#include <dev/nsp/nspreg.h>
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#include <dev/nsp/nspvar.h>
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/***************************************************
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* USER SETTINGS
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***************************************************/
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/* DEVICE CONFIGURATION FLAGS (MINOR)
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*
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* 0x01 DISCONNECT OFF
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* 0x02 PARITY LINE OFF
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* 0x04 IDENTIFY MSG OFF ( = single lun)
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* 0x08 SYNC TRANSFER OFF
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*/
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/***************************************************
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* PARAMS
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***************************************************/
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#define NSP_NTARGETS 8
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#define NSP_NLUNS 8
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#define NSP_MAX_DATA_SIZE (64 * 1024)
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#define NSP_SELTIMEOUT (200)
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#define NSP_DELAY_MAX (2 * 1000 * 1000)
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#define NSP_DELAY_INTERVAL (1)
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#define NSP_TIMER_1MS (1000 / 51)
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/***************************************************
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* DEBUG
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***************************************************/
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#ifdef NSP_DEBUG
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int nsp_debug;
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#endif /* NSP_DEBUG */
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#ifdef NSP_STATICS
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struct nsp_statics {
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int arbit_conflict_1;
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int arbit_conflict_2;
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int device_data_write;
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int device_busy;
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int disconnect;
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int reselect;
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int data_phase_bypass;
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} nsp_statics;
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#endif /* NSP_STATICS */
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/***************************************************
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* IO control
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***************************************************/
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#define NSP_READ_SUSPEND_IO 0x0001
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#define NSP_WRITE_SUSPEND_IO 0x0002
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#define NSP_USE_MEMIO 0x0004
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#define NSP_READ_FIFO_INTERRUPTS 0x0010
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#define NSP_WRITE_FIFO_INTERRUPTS 0x0020
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#define NSP_WAIT_FOR_SELECT 0x0100
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u_int nsp_io_control = NSP_IO_CONTROL_FLAGS;
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int nsp_read_suspend_bytes = DEV_BSIZE;
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int nsp_write_suspend_bytes = DEV_BSIZE;
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int nsp_read_interrupt_bytes = 4096;
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int nsp_write_interrupt_bytes = 4096;
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/***************************************************
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* DEVICE STRUCTURE
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***************************************************/
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extern struct cfdriver nsp_cd;
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/**************************************************************
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* DECLARE
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**************************************************************/
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#define NSP_FIFO_ON 1
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#define NSP_FIFO_OFF 0
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static void nsp_pio_read(struct nsp_softc *, int);
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static void nsp_pio_write(struct nsp_softc *, int);
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static int nsp_xfer(struct nsp_softc *, u_int8_t *, int, int, int);
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static int nsp_msg(struct nsp_softc *, struct targ_info *, u_int);
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static int nsp_reselected(struct nsp_softc *);
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static int nsp_disconnected(struct nsp_softc *, struct targ_info *);
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static void nsp_pdma_end(struct nsp_softc *, struct targ_info *);
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static void nsphw_init(struct nsp_softc *);
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static int nsp_target_nexus_establish(struct nsp_softc *);
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static int nsp_lun_nexus_establish(struct nsp_softc *);
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static int nsp_ccb_nexus_establish(struct nsp_softc *);
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static int nsp_world_start(struct nsp_softc *, int);
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static int nsphw_start_selection(struct nsp_softc *sc, struct slccb *);
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static void nsphw_bus_reset(struct nsp_softc *);
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static void nsphw_attention(struct nsp_softc *);
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static u_int nsp_fifo_count(struct nsp_softc *);
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static u_int nsp_request_count(struct nsp_softc *);
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static int nsp_negate_signal(struct nsp_softc *, u_int8_t, u_char *);
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static int nsp_expect_signal(struct nsp_softc *, u_int8_t, u_int8_t);
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static void nsp_start_timer(struct nsp_softc *, int);
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static void nsp_setup_fifo(struct nsp_softc *, int, int, int);
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static int nsp_targ_init(struct nsp_softc *, struct targ_info *, int);
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static void nsphw_selection_done_and_expect_msgout(struct nsp_softc *);
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static void nsp_data_padding(struct nsp_softc *, int, u_int);
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static int nsp_timeout(struct nsp_softc *);
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static int nsp_read_fifo(struct nsp_softc *, int);
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static int nsp_write_fifo(struct nsp_softc *, int);
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static int nsp_phase_match(struct nsp_softc *, u_int8_t, u_int8_t);
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static int nsp_wait_interrupt(struct nsp_softc *);
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struct scsi_low_funcs nspfuncs = {
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SC_LOW_INIT_T nsp_world_start,
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SC_LOW_BUSRST_T nsphw_bus_reset,
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SC_LOW_TARG_INIT_T nsp_targ_init,
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SC_LOW_LUN_INIT_T NULL,
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SC_LOW_SELECT_T nsphw_start_selection,
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SC_LOW_NEXUS_T nsp_lun_nexus_establish,
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SC_LOW_NEXUS_T nsp_ccb_nexus_establish,
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SC_LOW_ATTEN_T nsphw_attention,
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SC_LOW_MSG_T nsp_msg,
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SC_LOW_TIMEOUT_T nsp_timeout,
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SC_LOW_POLL_T nspintr,
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NULL,
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};
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/****************************************************
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* hwfuncs
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****************************************************/
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static __inline u_int8_t nsp_cr_read_1(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs);
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static __inline void nsp_cr_write_1(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs, u_int8_t va);
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static __inline u_int8_t
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nsp_cr_read_1(bst, bsh, ofs)
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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bus_addr_t ofs;
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{
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bus_space_write_1(bst, bsh, nsp_idxr, ofs);
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return bus_space_read_1(bst, bsh, nsp_datar);
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}
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static __inline void
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nsp_cr_write_1(bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs,
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u_int8_t va)
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{
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bus_space_write_1(bst, bsh, nsp_idxr, ofs);
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bus_space_write_1(bst, bsh, nsp_datar, va);
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}
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static int
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nsp_expect_signal(struct nsp_softc *sc, u_int8_t curphase, u_int8_t mask)
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{
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struct scsi_low_softc *slp = &sc->sc_sclow;
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bus_space_tag_t bst = sc->sc_iot;
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bus_space_handle_t bsh = sc->sc_ioh;
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int wc;
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u_int8_t ph, isrc;
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for (wc = 0; wc < NSP_DELAY_MAX / NSP_DELAY_INTERVAL; wc ++)
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{
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ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON);
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if (ph == (u_int8_t) -1)
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return -1;
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isrc = bus_space_read_1(bst, bsh, nsp_irqsr);
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if (isrc & IRQSR_SCSI)
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return 0;
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if ((ph & mask) != 0 && (ph & SCBUSMON_PHMASK) == curphase)
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return 1;
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DELAY(NSP_DELAY_INTERVAL);
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}
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device_printf(slp->sl_dev, "nsp_expect_signal timeout\n");
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return -1;
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}
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static void
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nsphw_init(sc)
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struct nsp_softc *sc;
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{
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bus_space_tag_t bst = sc->sc_iot;
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bus_space_handle_t bsh = sc->sc_ioh;
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/* block all interrupts */
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bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_ALLMASK);
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/* setup SCSI interface */
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bus_space_write_1(bst, bsh, nsp_ifselr, IFSELR_IFSEL);
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nsp_cr_write_1(bst, bsh, NSPR_SCIENR, 0);
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nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_IO8);
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nsp_cr_write_1(bst, bsh, NSPR_CLKDIVR, sc->sc_iclkdiv);
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nsp_cr_write_1(bst, bsh, NSPR_SCIENR, sc->sc_icr);
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nsp_cr_write_1(bst, bsh, NSPR_PARITYR, sc->sc_parr);
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nsp_cr_write_1(bst, bsh, NSPR_PTCLRR,
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PTCLRR_ACK | PTCLRR_REQ | PTCLRR_HOST | PTCLRR_RSS);
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/* setup fifo asic */
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bus_space_write_1(bst, bsh, nsp_ifselr, IFSELR_REGSEL);
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nsp_cr_write_1(bst, bsh, NSPR_TERMPWRC, 0);
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if ((nsp_cr_read_1(bst, bsh, NSPR_OCR) & OCR_TERMPWRS) == 0)
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nsp_cr_write_1(bst, bsh, NSPR_TERMPWRC, TERMPWRC_POWON);
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nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_IO8);
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nsp_cr_write_1(bst, bsh, NSPR_CLKDIVR, sc->sc_clkdiv);
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nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0);
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nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0);
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nsp_cr_write_1(bst, bsh, NSPR_SYNCR, 0);
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nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, 0);
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/* enable interrupts and ack them */
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nsp_cr_write_1(bst, bsh, NSPR_SCIENR, sc->sc_icr);
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bus_space_write_1(bst, bsh, nsp_irqcr, IRQSR_MASK);
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nsp_setup_fifo(sc, NSP_FIFO_OFF, SCSI_LOW_READ, 0);
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}
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/****************************************************
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* scsi low interface
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****************************************************/
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static void
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nsphw_attention(sc)
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struct nsp_softc *sc;
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{
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bus_space_tag_t bst = sc->sc_iot;
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bus_space_handle_t bsh = sc->sc_ioh;
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u_int8_t cr;
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cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR)/* & ~SCBUSCR_ACK */;
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr | SCBUSCR_ATN);
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DELAY(10);
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}
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static void
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nsphw_bus_reset(sc)
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struct nsp_softc *sc;
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{
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bus_space_tag_t bst = sc->sc_iot;
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bus_space_handle_t bsh = sc->sc_ioh;
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int i;
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bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_ALLMASK);
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_RST);
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DELAY(100 * 1000); /* 100ms */
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, 0);
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for (i = 0; i < 5; i ++)
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(void) nsp_cr_read_1(bst, bsh, NSPR_IRQPHS);
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bus_space_write_1(bst, bsh, nsp_irqcr, IRQSR_MASK);
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}
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static void
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nsphw_selection_done_and_expect_msgout(sc)
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struct nsp_softc *sc;
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{
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struct scsi_low_softc *slp = &sc->sc_sclow;
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bus_space_tag_t bst = sc->sc_iot;
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bus_space_handle_t bsh = sc->sc_ioh;
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/* clear ack counter */
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sc->sc_cnt = 0;
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nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_PT | PTCLRR_ACK |
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PTCLRR_REQ | PTCLRR_HOST);
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/* deassert sel and assert atten */
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sc->sc_seltout = 0;
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, sc->sc_busc);
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DELAY(1);
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR,
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sc->sc_busc | SCBUSCR_ADIR | SCBUSCR_ACKEN);
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SCSI_LOW_ASSERT_ATN(slp);
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}
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static int
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nsphw_start_selection(sc, cb)
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struct nsp_softc *sc;
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struct slccb *cb;
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{
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struct scsi_low_softc *slp = &sc->sc_sclow;
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bus_space_tag_t bst = sc->sc_iot;
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bus_space_handle_t bsh = sc->sc_ioh;
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struct targ_info *ti = cb->ti;
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register u_int8_t arbs, ph;
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int s, wc;
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wc = sc->sc_tmaxcnt = cb->ccb_tcmax * 1000 * 1000;
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sc->sc_dataout_timeout = 0;
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/* check bus free */
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s = splhigh();
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ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON);
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if (ph != SCBUSMON_FREE)
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{
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splx(s);
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#ifdef NSP_STATICS
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nsp_statics.arbit_conflict_1 ++;
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#endif /* NSP_STATICS */
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return SCSI_LOW_START_FAIL;
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}
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/* start arbitration */
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nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_EXEC);
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splx(s);
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SCSI_LOW_SETUP_PHASE(ti, PH_ARBSTART);
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do
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{
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/* XXX: what a stupid chip! */
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arbs = nsp_cr_read_1(bst, bsh, NSPR_ARBITS);
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DELAY(1);
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}
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while ((arbs & (ARBITS_WIN | ARBITS_FAIL)) == 0 && wc -- > 0);
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if ((arbs & ARBITS_WIN) == 0)
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{
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nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_CLR);
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#ifdef NSP_STATICS
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nsp_statics.arbit_conflict_2 ++;
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#endif /* NSP_STATICS */
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return SCSI_LOW_START_FAIL;
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}
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/* assert select line */
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SCSI_LOW_SETUP_PHASE(ti, PH_SELSTART);
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scsi_low_arbit_win(slp);
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s = splhigh();
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DELAY(3);
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nsp_cr_write_1(bst, bsh, NSPR_DATA,
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sc->sc_idbit | (1 << ti->ti_id));
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR,
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SCBUSCR_SEL | SCBUSCR_BSY | sc->sc_busc);
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DELAY(3);
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_SEL |
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SCBUSCR_BSY | SCBUSCR_DOUT | sc->sc_busc);
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nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_CLR);
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DELAY(3);
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nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR,
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SCBUSCR_SEL | SCBUSCR_DOUT | sc->sc_busc);
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DELAY(1);
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if ((nsp_io_control & NSP_WAIT_FOR_SELECT) != 0)
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{
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#define NSP_FIRST_SEL_WAIT 300
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#define NSP_SEL_CHECK_INTERVAL 10
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/* wait for a selection response */
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for (wc = 0; wc < NSP_FIRST_SEL_WAIT / NSP_SEL_CHECK_INTERVAL;
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wc ++)
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{
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ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON);
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if ((ph & SCBUSMON_BSY) == 0)
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{
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DELAY(NSP_SEL_CHECK_INTERVAL);
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continue;
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}
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DELAY(1);
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ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON);
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if ((ph & SCBUSMON_BSY) != 0)
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{
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nsphw_selection_done_and_expect_msgout(sc);
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splx(s);
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SCSI_LOW_SETUP_PHASE(ti, PH_SELECTED);
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return SCSI_LOW_START_OK;
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}
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}
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}
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splx(s);
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/* check a selection timeout */
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nsp_start_timer(sc, NSP_TIMER_1MS);
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sc->sc_seltout = 1;
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return SCSI_LOW_START_OK;
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}
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static int
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nsp_world_start(sc, fdone)
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struct nsp_softc *sc;
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int fdone;
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{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
|
|
sc->sc_cnt = 0;
|
|
sc->sc_seltout = 0;
|
|
|
|
if ((slp->sl_cfgflags & CFG_NOATTEN) == 0)
|
|
sc->sc_busc = SCBUSCR_ATN;
|
|
else
|
|
sc->sc_busc = 0;
|
|
|
|
if ((slp->sl_cfgflags & CFG_NOPARITY) == 0)
|
|
sc->sc_parr = PARITYR_ENABLE | PARITYR_CLEAR;
|
|
else
|
|
sc->sc_parr = 0;
|
|
|
|
sc->sc_icr = (SCIENR_SCCHG | SCIENR_RESEL | SCIENR_RST);
|
|
|
|
nsphw_init(sc);
|
|
scsi_low_bus_reset(slp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct ncp_synch_data {
|
|
u_int min_period;
|
|
u_int max_period;
|
|
u_int chip_period;
|
|
u_int ack_width;
|
|
};
|
|
|
|
static struct ncp_synch_data ncp_sync_data_40M[] = {
|
|
{0x0c,0x0c,0x1,0}, /* 20MB 50ns*/
|
|
{0x19,0x19,0x3,1}, /* 10MB 100ns*/
|
|
{0x1a,0x25,0x5,2}, /* 7.5MB 150ns*/
|
|
{0x26,0x32,0x7,3}, /* 5MB 200ns*/
|
|
{0x0, 0, 0, 0}
|
|
};
|
|
|
|
static struct ncp_synch_data ncp_sync_data_20M[] = {
|
|
{0x19,0x19,0x1,0}, /* 10MB 100ns*/
|
|
{0x1a,0x25,0x2,0}, /* 7.5MB 150ns*/
|
|
{0x26,0x32,0x3,1}, /* 5MB 200ns*/
|
|
{0x0, 0, 0, 0}
|
|
};
|
|
|
|
static int
|
|
nsp_msg(sc, ti, msg)
|
|
struct nsp_softc *sc;
|
|
struct targ_info *ti;
|
|
u_int msg;
|
|
{
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
struct ncp_synch_data *sdp;
|
|
struct nsp_targ_info *nti = (void *) ti;
|
|
u_int period, offset;
|
|
int i, error;
|
|
|
|
if ((msg & SCSI_LOW_MSG_WIDE) != 0)
|
|
{
|
|
if (ti->ti_width != SCSI_LOW_BUS_WIDTH_8)
|
|
{
|
|
ti->ti_width = SCSI_LOW_BUS_WIDTH_8;
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if ((msg & SCSI_LOW_MSG_SYNCH) == 0)
|
|
return 0;
|
|
|
|
period = ti->ti_maxsynch.period;
|
|
offset = ti->ti_maxsynch.offset;
|
|
if (sc->sc_iclkdiv == CLKDIVR_20M)
|
|
sdp = &ncp_sync_data_20M[0];
|
|
else
|
|
sdp = &ncp_sync_data_40M[0];
|
|
|
|
for (i = 0; sdp->max_period != 0; i ++, sdp ++)
|
|
{
|
|
if (period >= sdp->min_period && period <= sdp->max_period)
|
|
break;
|
|
}
|
|
|
|
if (period != 0 && sdp->max_period == 0)
|
|
{
|
|
/*
|
|
* NO proper period/offset found,
|
|
* Retry neg with the target.
|
|
*/
|
|
ti->ti_maxsynch.period = 0;
|
|
ti->ti_maxsynch.offset = 0;
|
|
nti->nti_reg_syncr = 0;
|
|
nti->nti_reg_ackwidth = 0;
|
|
error = EINVAL;
|
|
}
|
|
else
|
|
{
|
|
nti->nti_reg_syncr = (sdp->chip_period << SYNCR_PERS) |
|
|
(offset & SYNCR_OFFM);
|
|
nti->nti_reg_ackwidth = sdp->ack_width;
|
|
error = 0;
|
|
}
|
|
|
|
nsp_cr_write_1(bst, bsh, NSPR_SYNCR, nti->nti_reg_syncr);
|
|
nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, nti->nti_reg_ackwidth);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
nsp_targ_init(sc, ti, action)
|
|
struct nsp_softc *sc;
|
|
struct targ_info *ti;
|
|
int action;
|
|
{
|
|
struct nsp_targ_info *nti = (void *) ti;
|
|
|
|
if (action == SCSI_LOW_INFO_ALLOC || action == SCSI_LOW_INFO_REVOKE)
|
|
{
|
|
ti->ti_width = SCSI_LOW_BUS_WIDTH_8;
|
|
ti->ti_maxsynch.period = 100 / 4;
|
|
ti->ti_maxsynch.offset = 15;
|
|
nti->nti_reg_syncr = 0;
|
|
nti->nti_reg_ackwidth = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
nsp_start_timer(sc, time)
|
|
struct nsp_softc *sc;
|
|
int time;
|
|
{
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
|
|
sc->sc_timer = time;
|
|
nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, time);
|
|
}
|
|
|
|
/**************************************************************
|
|
* General probe attach
|
|
**************************************************************/
|
|
int
|
|
nspprobesubr(iot, ioh, dvcfg)
|
|
bus_space_tag_t iot;
|
|
bus_space_handle_t ioh;
|
|
u_int dvcfg;
|
|
{
|
|
u_int8_t regv;
|
|
|
|
regv = bus_space_read_1(iot, ioh, nsp_fifosr);
|
|
if (regv < 0x11 || regv >= 0x20)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
nspattachsubr(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
|
|
printf("\n");
|
|
|
|
sc->sc_idbit = (1 << slp->sl_hostid);
|
|
slp->sl_flags |= HW_READ_PADDING;
|
|
slp->sl_funcs = &nspfuncs;
|
|
sc->sc_tmaxcnt = SCSI_LOW_MIN_TOUT * 1000 * 1000; /* default */
|
|
|
|
(void) scsi_low_attach(slp, 0, NSP_NTARGETS, NSP_NLUNS,
|
|
sizeof(struct nsp_targ_info), 0);
|
|
}
|
|
|
|
/**************************************************************
|
|
* PDMA functions
|
|
**************************************************************/
|
|
static u_int
|
|
nsp_fifo_count(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
u_int count;
|
|
|
|
nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_RSS_ACK | PTCLRR_PT);
|
|
count = bus_space_read_1(bst, bsh, nsp_datar);
|
|
count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 8);
|
|
count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 16);
|
|
return count;
|
|
}
|
|
|
|
static u_int
|
|
nsp_request_count(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
u_int count;
|
|
|
|
nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_RSS_REQ | PTCLRR_PT);
|
|
count = bus_space_read_1(bst, bsh, nsp_datar);
|
|
count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 8);
|
|
count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 16);
|
|
return count;
|
|
}
|
|
|
|
static void
|
|
nsp_setup_fifo(sc, on, direction, datalen)
|
|
struct nsp_softc *sc;
|
|
int on;
|
|
int direction;
|
|
int datalen;
|
|
{
|
|
u_int8_t xfermode;
|
|
|
|
sc->sc_suspendio = 0;
|
|
if (on == NSP_FIFO_OFF)
|
|
{
|
|
xfermode = XFERMR_IO8;
|
|
goto out;
|
|
}
|
|
|
|
/* check if suspend io OK ? */
|
|
if (datalen > 0)
|
|
{
|
|
if (direction == SCSI_LOW_READ)
|
|
{
|
|
if ((nsp_io_control & NSP_READ_SUSPEND_IO) != 0 &&
|
|
(datalen % nsp_read_suspend_bytes) == 0)
|
|
sc->sc_suspendio = nsp_read_suspend_bytes;
|
|
}
|
|
else
|
|
{
|
|
if ((nsp_io_control & NSP_WRITE_SUSPEND_IO) != 0 &&
|
|
(datalen % nsp_write_suspend_bytes) == 0)
|
|
sc->sc_suspendio = nsp_write_suspend_bytes;
|
|
}
|
|
}
|
|
|
|
/* determine a transfer type */
|
|
if (datalen < DEV_BSIZE || (datalen & 3) != 0)
|
|
{
|
|
if (sc->sc_memh != 0 &&
|
|
(nsp_io_control & NSP_USE_MEMIO) != 0)
|
|
xfermode = XFERMR_XEN | XFERMR_MEM8;
|
|
else
|
|
xfermode = XFERMR_XEN | XFERMR_IO8;
|
|
}
|
|
else
|
|
{
|
|
if (sc->sc_memh != 0 &&
|
|
(nsp_io_control & NSP_USE_MEMIO) != 0)
|
|
xfermode = XFERMR_XEN | XFERMR_MEM32;
|
|
else
|
|
xfermode = XFERMR_XEN | XFERMR_IO32;
|
|
|
|
if (sc->sc_suspendio > 0)
|
|
xfermode |= XFERMR_FIFOEN;
|
|
}
|
|
|
|
out:
|
|
sc->sc_xfermr = xfermode;
|
|
nsp_cr_write_1(sc->sc_iot, sc->sc_ioh, NSPR_XFERMR, sc->sc_xfermr);
|
|
}
|
|
|
|
static void
|
|
nsp_pdma_end(sc, ti)
|
|
struct nsp_softc *sc;
|
|
struct targ_info *ti;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
struct slccb *cb = slp->sl_Qnexus;
|
|
u_int len = 0, cnt;
|
|
|
|
sc->sc_dataout_timeout = 0;
|
|
slp->sl_flags &= ~HW_PDMASTART;
|
|
nsp_setup_fifo(sc, NSP_FIFO_OFF, SCSI_LOW_READ, 0);
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
{
|
|
sc->sc_icr &= ~SCIENR_FIFO;
|
|
nsp_cr_write_1(sc->sc_iot, sc->sc_ioh, NSPR_SCIENR, sc->sc_icr);
|
|
}
|
|
|
|
if (cb == NULL)
|
|
{
|
|
slp->sl_error |= PDMAERR;
|
|
return;
|
|
}
|
|
|
|
if (ti->ti_phase == PH_DATA)
|
|
{
|
|
cnt = nsp_fifo_count(sc);
|
|
if (slp->sl_scp.scp_direction == SCSI_LOW_WRITE)
|
|
{
|
|
len = sc->sc_cnt - cnt;
|
|
if (sc->sc_cnt >= cnt &&
|
|
slp->sl_scp.scp_datalen + len <=
|
|
cb->ccb_scp.scp_datalen)
|
|
{
|
|
slp->sl_scp.scp_data -= len;
|
|
slp->sl_scp.scp_datalen += len;
|
|
}
|
|
else
|
|
{
|
|
slp->sl_error |= PDMAERR;
|
|
device_printf(slp->sl_dev,
|
|
"len %x >= datalen %x\n",
|
|
len, slp->sl_scp.scp_datalen);
|
|
}
|
|
}
|
|
else if (slp->sl_scp.scp_direction == SCSI_LOW_READ)
|
|
{
|
|
if (sc->sc_cnt != cnt ||
|
|
sc->sc_cnt > cb->ccb_scp.scp_datalen)
|
|
{
|
|
slp->sl_error |= PDMAERR;
|
|
device_printf(slp->sl_dev,
|
|
"data read count error %x != %x (%x)\n",
|
|
sc->sc_cnt, cnt,
|
|
cb->ccb_scp.scp_datalen);
|
|
}
|
|
}
|
|
sc->sc_cnt = cnt;
|
|
scsi_low_data_finish(slp);
|
|
}
|
|
else
|
|
{
|
|
|
|
device_printf(slp->sl_dev, "data phase miss\n");
|
|
slp->sl_error |= PDMAERR;
|
|
}
|
|
}
|
|
|
|
#define RFIFO_CRIT 64
|
|
#define WFIFO_CRIT 32
|
|
|
|
static void
|
|
nsp_data_padding(sc, direction, count)
|
|
struct nsp_softc *sc;
|
|
int direction;
|
|
u_int count;
|
|
{
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
|
|
if (count > NSP_MAX_DATA_SIZE)
|
|
count = NSP_MAX_DATA_SIZE;
|
|
|
|
nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_XEN | XFERMR_IO8);
|
|
if (direction == SCSI_LOW_READ)
|
|
{
|
|
while (count -- > 0)
|
|
(void) bus_space_read_1(bst, bsh, nsp_fifodr);
|
|
}
|
|
else
|
|
{
|
|
while (count -- > 0)
|
|
(void) bus_space_write_1(bst, bsh, nsp_fifodr, 0);
|
|
}
|
|
nsp_cr_write_1(bst, bsh, NSPR_XFERMR, sc->sc_xfermr);
|
|
}
|
|
|
|
static int
|
|
nsp_read_fifo(sc, suspendio)
|
|
struct nsp_softc *sc;
|
|
int suspendio;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
u_int res;
|
|
|
|
res = nsp_fifo_count(sc);
|
|
if (res == sc->sc_cnt)
|
|
return 0;
|
|
|
|
#ifdef NSP_DEBUG
|
|
if (res < sc->sc_cnt || res == (u_int) -1)
|
|
{
|
|
device_printf(slp->sl_dev,
|
|
"strange fifo ack count 0x%x < 0x%x\n", res, sc->sc_cnt);
|
|
return 0;
|
|
}
|
|
#endif /* NSP_DEBUG */
|
|
|
|
res = res - sc->sc_cnt;
|
|
if (res > slp->sl_scp.scp_datalen)
|
|
{
|
|
if ((slp->sl_error & PDMAERR) == 0)
|
|
{
|
|
device_printf(slp->sl_dev, "data overrun 0x%x > 0x%x\n",
|
|
res, slp->sl_scp.scp_datalen);
|
|
}
|
|
|
|
slp->sl_error |= PDMAERR;
|
|
slp->sl_scp.scp_datalen = 0;
|
|
|
|
if ((slp->sl_flags & HW_READ_PADDING) == 0)
|
|
{
|
|
device_printf(slp->sl_dev, "read padding required\n");
|
|
return 0;
|
|
}
|
|
|
|
nsp_data_padding(sc, SCSI_LOW_READ, res);
|
|
sc->sc_cnt += res;
|
|
return 1; /* padding start */
|
|
}
|
|
|
|
if (suspendio > 0 && slp->sl_scp.scp_datalen >= suspendio)
|
|
res = suspendio;
|
|
|
|
if ((sc->sc_xfermr & (XFERMR_MEM32 | XFERMR_MEM8)) != 0)
|
|
{
|
|
if ((sc->sc_xfermr & XFERMR_MEM32) != 0)
|
|
{
|
|
res &= ~3;
|
|
bus_space_read_region_4(sc->sc_memt, sc->sc_memh, 0,
|
|
(u_int32_t *) slp->sl_scp.scp_data, res >> 2);
|
|
}
|
|
else
|
|
{
|
|
bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 0,
|
|
(u_int8_t *) slp->sl_scp.scp_data, res);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((sc->sc_xfermr & XFERMR_IO32) != 0)
|
|
{
|
|
res &= ~3;
|
|
bus_space_read_multi_4(bst, bsh, nsp_fifodr,
|
|
(u_int32_t *) slp->sl_scp.scp_data, res >> 2);
|
|
}
|
|
else
|
|
{
|
|
bus_space_read_multi_1(bst, bsh, nsp_fifodr,
|
|
(u_int8_t *) slp->sl_scp.scp_data, res);
|
|
}
|
|
}
|
|
|
|
if (nsp_cr_read_1(bst, bsh, NSPR_PARITYR) & PARITYR_PE)
|
|
{
|
|
nsp_cr_write_1(bst, bsh, NSPR_PARITYR,
|
|
PARITYR_ENABLE | PARITYR_CLEAR);
|
|
scsi_low_assert_msg(slp, slp->sl_Tnexus, SCSI_LOW_MSG_ERROR, 1);
|
|
}
|
|
|
|
slp->sl_scp.scp_data += res;
|
|
slp->sl_scp.scp_datalen -= res;
|
|
sc->sc_cnt += res;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
nsp_write_fifo(sc, suspendio)
|
|
struct nsp_softc *sc;
|
|
int suspendio;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
u_int res;
|
|
register u_int8_t stat;
|
|
|
|
if (suspendio > 0)
|
|
{
|
|
#ifdef NSP_DEBUG
|
|
if ((slp->sl_scp.scp_datalen % WFIFO_CRIT) != 0)
|
|
{
|
|
device_printf(slp->sl_dev,
|
|
"strange write length 0x%x\n",
|
|
slp->sl_scp.scp_datalen);
|
|
}
|
|
#endif /* NSP_DEBUG */
|
|
res = slp->sl_scp.scp_datalen % suspendio;
|
|
if (res == 0)
|
|
{
|
|
res = suspendio;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
res = WFIFO_CRIT;
|
|
}
|
|
|
|
if (res > slp->sl_scp.scp_datalen)
|
|
res = slp->sl_scp.scp_datalen;
|
|
|
|
/* XXX: reconfirm! */
|
|
stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON) & SCBUSMON_PHMASK;
|
|
if (stat != PHASE_DATAOUT)
|
|
return 0;
|
|
|
|
if ((sc->sc_xfermr & (XFERMR_MEM32 | XFERMR_MEM8)) != 0)
|
|
{
|
|
if ((sc->sc_xfermr & XFERMR_MEM32) != 0)
|
|
{
|
|
bus_space_write_region_4(sc->sc_memt, sc->sc_memh, 0,
|
|
(u_int32_t *) slp->sl_scp.scp_data, res >> 2);
|
|
}
|
|
else
|
|
{
|
|
bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 0,
|
|
(u_int8_t *) slp->sl_scp.scp_data, res);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((sc->sc_xfermr & XFERMR_IO32) != 0)
|
|
{
|
|
bus_space_write_multi_4(bst, bsh, nsp_fifodr,
|
|
(u_int32_t *) slp->sl_scp.scp_data, res >> 2);
|
|
}
|
|
else
|
|
{
|
|
bus_space_write_multi_1(bst, bsh, nsp_fifodr,
|
|
(u_int8_t *) slp->sl_scp.scp_data, res);
|
|
}
|
|
}
|
|
|
|
slp->sl_scp.scp_datalen -= res;
|
|
slp->sl_scp.scp_data += res;
|
|
sc->sc_cnt += res;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
nsp_wait_interrupt(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
int tout;
|
|
register u_int8_t isrc;
|
|
|
|
for (tout = 0; tout < DEV_BSIZE / 10; tout ++)
|
|
{
|
|
isrc = bus_space_read_1(bst, bsh, nsp_irqsr);
|
|
if ((isrc & (IRQSR_SCSI | IRQSR_FIFO)) != 0)
|
|
{
|
|
if ((isrc & IRQSR_FIFO) != 0)
|
|
{
|
|
bus_space_write_1(bst, bsh,
|
|
nsp_irqcr, IRQCR_FIFOCL);
|
|
}
|
|
return 1;
|
|
}
|
|
DELAY(1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
nsp_pio_read(sc, suspendio)
|
|
struct nsp_softc *sc;
|
|
int suspendio;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
int tout, padding, datalen;
|
|
register u_int8_t stat, fstat;
|
|
|
|
padding = 0;
|
|
tout = sc->sc_tmaxcnt;
|
|
slp->sl_flags |= HW_PDMASTART;
|
|
datalen = slp->sl_scp.scp_datalen;
|
|
|
|
ReadLoop:
|
|
while (1)
|
|
{
|
|
stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON);
|
|
if (stat == (u_int8_t) -1)
|
|
return;
|
|
|
|
/* out of data phase */
|
|
if ((stat & SCBUSMON_PHMASK) != PHASE_DATAIN)
|
|
{
|
|
nsp_read_fifo(sc, 0);
|
|
return;
|
|
}
|
|
|
|
/* data phase */
|
|
fstat = bus_space_read_1(bst, bsh, nsp_fifosr);
|
|
if ((fstat & FIFOSR_FULLEMP) != 0)
|
|
{
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
{
|
|
bus_space_write_1(bst, bsh, nsp_irqcr,
|
|
IRQCR_FIFOCL);
|
|
}
|
|
|
|
if (suspendio > 0)
|
|
{
|
|
padding |= nsp_read_fifo(sc, suspendio);
|
|
}
|
|
else
|
|
{
|
|
padding |= nsp_read_fifo(sc, 0);
|
|
}
|
|
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
if (padding == 0 && slp->sl_scp.scp_datalen <= 0)
|
|
return;
|
|
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
break;
|
|
|
|
DELAY(1);
|
|
}
|
|
|
|
if ((-- tout) <= 0)
|
|
{
|
|
device_printf(slp->sl_dev, "nsp_pio_read: timeout\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
if (slp->sl_scp.scp_datalen > 0 &&
|
|
slp->sl_scp.scp_datalen > datalen - nsp_read_interrupt_bytes)
|
|
{
|
|
if (nsp_wait_interrupt(sc) != 0)
|
|
goto ReadLoop;
|
|
}
|
|
}
|
|
|
|
static void
|
|
nsp_pio_write(sc, suspendio)
|
|
struct nsp_softc *sc;
|
|
int suspendio;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
u_int rcount, acount;
|
|
int tout, datalen;
|
|
register u_int8_t stat, fstat;
|
|
|
|
tout = sc->sc_tmaxcnt;
|
|
slp->sl_flags |= HW_PDMASTART;
|
|
datalen = slp->sl_scp.scp_datalen;
|
|
|
|
WriteLoop:
|
|
while (1)
|
|
{
|
|
stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON) & SCBUSMON_PHMASK;
|
|
if (stat != PHASE_DATAOUT)
|
|
return;
|
|
|
|
if (slp->sl_scp.scp_datalen <= 0)
|
|
{
|
|
if (sc->sc_dataout_timeout == 0)
|
|
sc->sc_dataout_timeout = SCSI_LOW_TIMEOUT_HZ;
|
|
return;
|
|
}
|
|
|
|
fstat = bus_space_read_1(bst, bsh, nsp_fifosr);
|
|
if ((fstat & FIFOSR_FULLEMP) != 0)
|
|
{
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
{
|
|
bus_space_write_1(bst, bsh, nsp_irqcr,
|
|
IRQCR_FIFOCL);
|
|
}
|
|
|
|
if (suspendio > 0)
|
|
{
|
|
/* XXX:IMPORTANT:
|
|
* To avoid timeout of pcmcia bus
|
|
* (not scsi bus!), we should check
|
|
* the scsi device sends us request
|
|
* signals, which means the scsi device
|
|
* is ready to recieve data without
|
|
* heavy delays.
|
|
*/
|
|
if ((slp->sl_scp.scp_datalen % suspendio) == 0)
|
|
{
|
|
/* Step I:
|
|
* fill the nsp fifo, and waiting for
|
|
* the fifo empty.
|
|
*/
|
|
nsp_write_fifo(sc, 0);
|
|
}
|
|
else
|
|
{
|
|
/* Step II:
|
|
* check the request singals.
|
|
*/
|
|
acount = nsp_fifo_count(sc);
|
|
rcount = nsp_request_count(sc);
|
|
if (rcount <= acount)
|
|
{
|
|
nsp_write_fifo(sc, 0);
|
|
#ifdef NSP_STATICS
|
|
nsp_statics.device_busy ++;
|
|
#endif /* NSP_STATICS */
|
|
}
|
|
else
|
|
{
|
|
nsp_write_fifo(sc, suspendio);
|
|
#ifdef NSP_STATICS
|
|
nsp_statics.device_data_write ++;
|
|
#endif /* NSP_STATICS */
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
nsp_write_fifo(sc, 0);
|
|
}
|
|
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
break;
|
|
|
|
DELAY(1);
|
|
}
|
|
|
|
if ((-- tout) <= 0)
|
|
{
|
|
device_printf(slp->sl_dev, "nsp_pio_write: timeout\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (slp->sl_scp.scp_datalen > 0 &&
|
|
slp->sl_scp.scp_datalen > datalen - nsp_write_interrupt_bytes)
|
|
{
|
|
if (nsp_wait_interrupt(sc) != 0)
|
|
goto WriteLoop;
|
|
}
|
|
}
|
|
|
|
static int
|
|
nsp_negate_signal(struct nsp_softc *sc, u_int8_t mask, u_char *s)
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
int wc;
|
|
u_int8_t regv;
|
|
|
|
for (wc = 0; wc < NSP_DELAY_MAX / NSP_DELAY_INTERVAL; wc ++)
|
|
{
|
|
regv = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON);
|
|
if (regv == (u_int8_t) -1)
|
|
return -1;
|
|
if ((regv & mask) == 0)
|
|
return 1;
|
|
DELAY(NSP_DELAY_INTERVAL);
|
|
}
|
|
|
|
device_printf(slp->sl_dev, "%s nsp_negate_signal timeout\n", s);
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
nsp_xfer(sc, buf, len, phase, clear_atn)
|
|
struct nsp_softc *sc;
|
|
u_int8_t *buf;
|
|
int len;
|
|
int phase;
|
|
int clear_atn;
|
|
{
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
int ptr, rv;
|
|
|
|
for (ptr = 0; len > 0; len --, ptr ++)
|
|
{
|
|
rv = nsp_expect_signal(sc, phase, SCBUSMON_REQ);
|
|
if (rv <= 0)
|
|
goto out;
|
|
|
|
if (len == 1 && clear_atn != 0)
|
|
{
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR,
|
|
SCBUSCR_ADIR | SCBUSCR_ACKEN);
|
|
SCSI_LOW_DEASSERT_ATN(&sc->sc_sclow);
|
|
}
|
|
|
|
if (phase & SCBUSMON_IO)
|
|
{
|
|
buf[ptr] = nsp_cr_read_1(bst, bsh, NSPR_DATAACK);
|
|
}
|
|
else
|
|
{
|
|
nsp_cr_write_1(bst, bsh, NSPR_DATAACK, buf[ptr]);
|
|
}
|
|
nsp_negate_signal(sc, SCBUSMON_ACK, "xfer<ACK>");
|
|
}
|
|
|
|
out:
|
|
return len;
|
|
}
|
|
|
|
/**************************************************************
|
|
* disconnect & reselect (HW low)
|
|
**************************************************************/
|
|
static int
|
|
nsp_reselected(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
struct targ_info *ti;
|
|
u_int sid;
|
|
u_int8_t cr;
|
|
|
|
sid = (u_int) nsp_cr_read_1(bst, bsh, NSPR_RESELR);
|
|
sid &= ~sc->sc_idbit;
|
|
sid = ffs(sid) - 1;
|
|
if ((ti = scsi_low_reselected(slp, sid)) == NULL)
|
|
return EJUSTRETURN;
|
|
|
|
nsp_negate_signal(sc, SCBUSMON_SEL, "reselect<SEL>");
|
|
|
|
cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR);
|
|
cr &= ~(SCBUSCR_BSY | SCBUSCR_ATN);
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr);
|
|
cr |= SCBUSCR_ADIR | SCBUSCR_ACKEN;
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr);
|
|
|
|
#ifdef NSP_STATICS
|
|
nsp_statics.reselect ++;
|
|
#endif /* NSP_STATCIS */
|
|
return EJUSTRETURN;
|
|
}
|
|
|
|
static int
|
|
nsp_disconnected(sc, ti)
|
|
struct nsp_softc *sc;
|
|
struct targ_info *ti;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
|
|
nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_PT | PTCLRR_ACK |
|
|
PTCLRR_REQ | PTCLRR_HOST);
|
|
if ((sc->sc_icr & SCIENR_FIFO) != 0)
|
|
{
|
|
sc->sc_icr &= ~SCIENR_FIFO;
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCIENR, sc->sc_icr);
|
|
}
|
|
sc->sc_cnt = 0;
|
|
sc->sc_dataout_timeout = 0;
|
|
#ifdef NSP_STATICS
|
|
nsp_statics.disconnect ++;
|
|
#endif /* NSP_STATICS */
|
|
scsi_low_disconnected(slp, ti);
|
|
return 1;
|
|
}
|
|
|
|
/**************************************************************
|
|
* SEQUENCER
|
|
**************************************************************/
|
|
static void nsp_error(struct nsp_softc *, u_char *, u_int8_t, u_int8_t, u_int8_t);
|
|
|
|
static void
|
|
nsp_error(struct nsp_softc * sc, u_char *s, u_int8_t isrc, u_int8_t ph,
|
|
u_int8_t irqphs)
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
|
|
device_printf(slp->sl_dev, "%s\n", s);
|
|
device_printf(slp->sl_dev, "isrc 0x%x scmon 0x%x irqphs 0x%x\n",
|
|
(u_int) isrc, (u_int) ph, (u_int) irqphs);
|
|
}
|
|
|
|
static int
|
|
nsp_target_nexus_establish(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
struct targ_info *ti = slp->sl_Tnexus;
|
|
struct nsp_targ_info *nti = (void *) ti;
|
|
|
|
/* setup synch transfer registers */
|
|
nsp_cr_write_1(bst, bsh, NSPR_SYNCR, nti->nti_reg_syncr);
|
|
nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, nti->nti_reg_ackwidth);
|
|
|
|
/* setup pdma fifo (minimum) */
|
|
nsp_setup_fifo(sc, NSP_FIFO_ON, SCSI_LOW_READ, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
nsp_lun_nexus_establish(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
nsp_ccb_nexus_establish(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
struct slccb *cb = slp->sl_Qnexus;
|
|
|
|
sc->sc_tmaxcnt = cb->ccb_tcmax * 1000 * 1000;
|
|
|
|
/* setup pdma fifo */
|
|
nsp_setup_fifo(sc, NSP_FIFO_ON,
|
|
slp->sl_scp.scp_direction, slp->sl_scp.scp_datalen);
|
|
|
|
if (slp->sl_scp.scp_direction == SCSI_LOW_READ)
|
|
{
|
|
if (sc->sc_suspendio > 0 &&
|
|
(nsp_io_control & NSP_READ_FIFO_INTERRUPTS) != 0)
|
|
{
|
|
sc->sc_icr |= SCIENR_FIFO;
|
|
nsp_cr_write_1(sc->sc_iot, sc->sc_ioh,
|
|
NSPR_SCIENR, sc->sc_icr);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (sc->sc_suspendio > 0 &&
|
|
(nsp_io_control & NSP_WRITE_FIFO_INTERRUPTS) != 0)
|
|
{
|
|
sc->sc_icr |= SCIENR_FIFO;
|
|
nsp_cr_write_1(sc->sc_iot, sc->sc_ioh,
|
|
NSPR_SCIENR, sc->sc_icr);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
nsp_phase_match(struct nsp_softc *sc, u_int8_t phase, u_int8_t stat)
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
|
|
if ((stat & SCBUSMON_PHMASK) != phase)
|
|
{
|
|
device_printf(slp->sl_dev, "phase mismatch 0x%x != 0x%x\n",
|
|
(u_int) phase, (u_int) stat);
|
|
return EINVAL;
|
|
}
|
|
|
|
if ((stat & SCBUSMON_REQ) == 0)
|
|
return EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
nspintr(arg)
|
|
void *arg;
|
|
{
|
|
struct nsp_softc *sc = arg;
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t bst = sc->sc_iot;
|
|
bus_space_handle_t bsh = sc->sc_ioh;
|
|
struct targ_info *ti;
|
|
struct buf *bp;
|
|
u_int derror, flags;
|
|
int len, rv;
|
|
u_int8_t isrc, ph, irqphs, cr, regv;
|
|
|
|
/*******************************************
|
|
* interrupt check
|
|
*******************************************/
|
|
if (slp->sl_flags & HW_INACTIVE)
|
|
return 0;
|
|
|
|
bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_IRQDIS);
|
|
isrc = bus_space_read_1(bst, bsh, nsp_irqsr);
|
|
if (isrc == (u_int8_t) -1 || (isrc & IRQSR_MASK) == 0)
|
|
{
|
|
bus_space_write_1(bst, bsh, nsp_irqcr, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* XXX: IMPORTANT
|
|
* Do not read an irqphs register if no scsi phase interrupt.
|
|
* Unless, you should lose a scsi phase interrupt.
|
|
*/
|
|
ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON);
|
|
if ((isrc & IRQSR_SCSI) != 0)
|
|
{
|
|
irqphs = nsp_cr_read_1(bst, bsh, NSPR_IRQPHS);
|
|
}
|
|
else
|
|
irqphs = 0;
|
|
|
|
/*
|
|
* timer interrupt handler (scsi vs timer interrupts)
|
|
*/
|
|
if (sc->sc_timer != 0)
|
|
{
|
|
nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0);
|
|
nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0);
|
|
sc->sc_timer = 0;
|
|
}
|
|
|
|
/* check a timer interrupt */
|
|
regv = 0;
|
|
if ((isrc & IRQSR_TIMER) != 0)
|
|
{
|
|
if ((isrc & IRQSR_MASK) == IRQSR_TIMER && sc->sc_seltout == 0)
|
|
{
|
|
bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_TIMERCL);
|
|
return 1;
|
|
}
|
|
regv |= IRQCR_TIMERCL;
|
|
}
|
|
|
|
/* check a fifo interrupt */
|
|
if ((isrc & IRQSR_FIFO) != 0)
|
|
{
|
|
regv |= IRQCR_FIFOCL;
|
|
}
|
|
|
|
/* OK. enable all interrupts */
|
|
bus_space_write_1(bst, bsh, nsp_irqcr, regv);
|
|
|
|
/*******************************************
|
|
* debug section
|
|
*******************************************/
|
|
#ifdef NSP_DEBUG
|
|
if (nsp_debug)
|
|
{
|
|
nsp_error(sc, "current status", isrc, ph, irqphs);
|
|
scsi_low_print(slp, NULL);
|
|
#ifdef KDB
|
|
if (nsp_debug > 1)
|
|
kdb_enter(KDB_WHY_CAM, "nsp");
|
|
#endif /* KDB */
|
|
}
|
|
#endif /* NSP_DEBUG */
|
|
|
|
/*******************************************
|
|
* Parse hardware SCSI irq reasons register
|
|
*******************************************/
|
|
if ((isrc & IRQSR_SCSI) != 0)
|
|
{
|
|
if ((irqphs & IRQPHS_RST) != 0)
|
|
{
|
|
scsi_low_restart(slp, SCSI_LOW_RESTART_SOFT,
|
|
"bus reset (power off?)");
|
|
return 1;
|
|
}
|
|
|
|
if ((irqphs & IRQPHS_RSEL) != 0)
|
|
{
|
|
bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_RESCL);
|
|
if (nsp_reselected(sc) == EJUSTRETURN)
|
|
return 1;
|
|
}
|
|
|
|
if ((irqphs & (IRQPHS_PCHG | IRQPHS_LBF)) == 0)
|
|
return 1;
|
|
}
|
|
|
|
/*******************************************
|
|
* nexus check
|
|
*******************************************/
|
|
if ((ti = slp->sl_Tnexus) == NULL)
|
|
{
|
|
/* unknown scsi phase changes */
|
|
nsp_error(sc, "unknown scsi phase changes", isrc, ph, irqphs);
|
|
return 0;
|
|
}
|
|
|
|
/*******************************************
|
|
* aribitration & selection
|
|
*******************************************/
|
|
switch (ti->ti_phase)
|
|
{
|
|
case PH_SELSTART:
|
|
if ((ph & SCBUSMON_BSY) == 0)
|
|
{
|
|
if (sc->sc_seltout >= NSP_SELTIMEOUT)
|
|
{
|
|
sc->sc_seltout = 0;
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, 0);
|
|
return nsp_disconnected(sc, ti);
|
|
}
|
|
sc->sc_seltout ++;
|
|
nsp_start_timer(sc, NSP_TIMER_1MS);
|
|
return 1;
|
|
}
|
|
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_SELECTED);
|
|
nsphw_selection_done_and_expect_msgout(sc);
|
|
return 1;
|
|
|
|
case PH_SELECTED:
|
|
if ((isrc & IRQSR_SCSI) == 0)
|
|
return 1;
|
|
|
|
nsp_target_nexus_establish(sc);
|
|
break;
|
|
|
|
case PH_RESEL:
|
|
if ((isrc & IRQSR_SCSI) == 0)
|
|
return 1;
|
|
|
|
nsp_target_nexus_establish(sc);
|
|
if ((ph & SCBUSMON_PHMASK) != PHASE_MSGIN)
|
|
{
|
|
device_printf(slp->sl_dev,
|
|
"unexpected phase after reselect\n");
|
|
slp->sl_error |= FATALIO;
|
|
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 1);
|
|
return 1;
|
|
}
|
|
break;
|
|
|
|
case PH_DATA:
|
|
if ((isrc & IRQSR_SCSI) != 0)
|
|
break;
|
|
if ((isrc & IRQSR_FIFO) != 0)
|
|
{
|
|
if (NSP_IS_PHASE_DATA(ph) == 0)
|
|
return 1;
|
|
irqphs = (ph & IRQPHS_PHMASK);
|
|
break;
|
|
}
|
|
return 1;
|
|
|
|
default:
|
|
if ((isrc & IRQSR_SCSI) == 0)
|
|
return 1;
|
|
break;
|
|
}
|
|
|
|
/*******************************************
|
|
* data phase control
|
|
*******************************************/
|
|
if (slp->sl_flags & HW_PDMASTART)
|
|
{
|
|
if ((isrc & IRQSR_SCSI) != 0 &&
|
|
NSP_IS_IRQPHS_DATA(irqphs) == 0)
|
|
{
|
|
if (slp->sl_scp.scp_direction == SCSI_LOW_READ)
|
|
nsp_pio_read(sc, 0);
|
|
nsp_pdma_end(sc, ti);
|
|
}
|
|
}
|
|
|
|
/*******************************************
|
|
* scsi seq
|
|
*******************************************/
|
|
if (slp->sl_msgphase != 0 && (irqphs & IRQPHS_LBF) != 0)
|
|
return nsp_disconnected(sc, ti);
|
|
|
|
/* check unexpected bus free state */
|
|
if (ph == 0)
|
|
{
|
|
nsp_error(sc, "unexpected bus free", isrc, ph, irqphs);
|
|
return nsp_disconnected(sc, ti);
|
|
}
|
|
|
|
/* check normal scsi phase */
|
|
switch (irqphs & IRQPHS_PHMASK)
|
|
{
|
|
case IRQPHS_CMD:
|
|
if (nsp_phase_match(sc, PHASE_CMD, ph) != 0)
|
|
return 1;
|
|
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_CMD);
|
|
if (scsi_low_cmd(slp, ti) != 0)
|
|
{
|
|
scsi_low_attention(slp);
|
|
}
|
|
|
|
nsp_cr_write_1(bst, bsh, NSPR_CMDCR, CMDCR_PTCLR);
|
|
for (len = 0; len < slp->sl_scp.scp_cmdlen; len ++)
|
|
nsp_cr_write_1(bst, bsh, NSPR_CMDDR,
|
|
slp->sl_scp.scp_cmd[len]);
|
|
|
|
nsp_cr_write_1(bst, bsh, NSPR_CMDCR, CMDCR_PTCLR | CMDCR_EXEC);
|
|
break;
|
|
|
|
case IRQPHS_DATAOUT:
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_DATA);
|
|
if (scsi_low_data(slp, ti, &bp, SCSI_LOW_WRITE) != 0)
|
|
{
|
|
scsi_low_attention(slp);
|
|
}
|
|
|
|
nsp_pio_write(sc, sc->sc_suspendio);
|
|
break;
|
|
|
|
case IRQPHS_DATAIN:
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_DATA);
|
|
if (scsi_low_data(slp, ti, &bp, SCSI_LOW_READ) != 0)
|
|
{
|
|
scsi_low_attention(slp);
|
|
}
|
|
|
|
nsp_pio_read(sc, sc->sc_suspendio);
|
|
break;
|
|
|
|
case IRQPHS_STATUS:
|
|
if (nsp_phase_match(sc, PHASE_STATUS, ph) != 0)
|
|
return 1;
|
|
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_STAT);
|
|
regv = nsp_cr_read_1(bst, bsh, NSPR_DATA);
|
|
if (nsp_cr_read_1(bst, bsh, NSPR_PARITYR) & PARITYR_PE)
|
|
{
|
|
nsp_cr_write_1(bst, bsh, NSPR_PARITYR,
|
|
PARITYR_ENABLE | PARITYR_CLEAR);
|
|
derror = SCSI_LOW_DATA_PE;
|
|
}
|
|
else
|
|
derror = 0;
|
|
|
|
/* assert ACK */
|
|
cr = SCBUSCR_ACK | nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR);
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr);
|
|
|
|
if (scsi_low_statusin(slp, ti, derror | regv) != 0)
|
|
{
|
|
scsi_low_attention(slp);
|
|
}
|
|
|
|
/* check REQ nagated */
|
|
nsp_negate_signal(sc, SCBUSMON_REQ, "statin<REQ>");
|
|
|
|
/* deassert ACK */
|
|
cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR) & (~SCBUSCR_ACK);
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr);
|
|
break;
|
|
|
|
case IRQPHS_MSGOUT:
|
|
if (nsp_phase_match(sc, PHASE_MSGOUT, ph) != 0)
|
|
return 1;
|
|
|
|
#ifdef NSP_MSGOUT_SERIALIZE
|
|
/*
|
|
* XXX: NSP QUIRK
|
|
* NSP invoke interrupts only in the case of scsi phase changes,
|
|
* therefore we should poll the scsi phase here to catch
|
|
* the next "msg out" if exists (no scsi phase changes).
|
|
*/
|
|
rv = len = 16;
|
|
do {
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_MSGOUT);
|
|
flags = (ti->ti_ophase != ti->ti_phase) ?
|
|
SCSI_LOW_MSGOUT_INIT : 0;
|
|
len = scsi_low_msgout(slp, ti, flags);
|
|
|
|
if (len > 1 && slp->sl_atten == 0)
|
|
{
|
|
scsi_low_attention(slp);
|
|
}
|
|
|
|
if (nsp_xfer(sc, ti->ti_msgoutstr, len, PHASE_MSGOUT,
|
|
slp->sl_clear_atten) != 0)
|
|
{
|
|
slp->sl_error |= FATALIO;
|
|
nsp_error(sc, "MSGOUT: xfer short",
|
|
isrc, ph, irqphs);
|
|
}
|
|
|
|
/* catch a next signal */
|
|
rv = nsp_expect_signal(sc, PHASE_MSGOUT, SCBUSMON_REQ);
|
|
}
|
|
while (rv > 0 && len -- > 0);
|
|
|
|
#else /* !NSP_MSGOUT_SERIALIZE */
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_MSGOUT);
|
|
flags = SCSI_LOW_MSGOUT_UNIFY;
|
|
if (ti->ti_ophase != ti->ti_phase)
|
|
flags |= SCSI_LOW_MSGOUT_INIT;
|
|
len = scsi_low_msgout(slp, ti, flags);
|
|
|
|
if (len > 1 && slp->sl_atten == 0)
|
|
{
|
|
scsi_low_attention(slp);
|
|
}
|
|
|
|
if (nsp_xfer(sc, ti->ti_msgoutstr, len, PHASE_MSGOUT,
|
|
slp->sl_clear_atten) != 0)
|
|
{
|
|
nsp_error(sc, "MSGOUT: xfer short", isrc, ph, irqphs);
|
|
}
|
|
|
|
#endif /* !NSP_MSGOUT_SERIALIZE */
|
|
break;
|
|
|
|
case IRQPHS_MSGIN:
|
|
if (nsp_phase_match(sc, PHASE_MSGIN, ph) != 0)
|
|
return 1;
|
|
|
|
/*
|
|
* XXX: NSP QUIRK
|
|
* NSP invoke interrupts only in the case of scsi phase changes,
|
|
* therefore we should poll the scsi phase here to catch
|
|
* the next "msg in" if exists (no scsi phase changes).
|
|
*/
|
|
rv = len = 16;
|
|
do {
|
|
SCSI_LOW_SETUP_PHASE(ti, PH_MSGIN);
|
|
|
|
/* read a data */
|
|
regv = nsp_cr_read_1(bst, bsh, NSPR_DATA);
|
|
if (nsp_cr_read_1(bst, bsh, NSPR_PARITYR) & PARITYR_PE)
|
|
{
|
|
nsp_cr_write_1(bst, bsh,
|
|
NSPR_PARITYR,
|
|
PARITYR_ENABLE | PARITYR_CLEAR);
|
|
derror = SCSI_LOW_DATA_PE;
|
|
}
|
|
else
|
|
{
|
|
derror = 0;
|
|
}
|
|
|
|
/* assert ack */
|
|
cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR) | SCBUSCR_ACK;
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr);
|
|
|
|
if (scsi_low_msgin(slp, ti, regv | derror) == 0)
|
|
{
|
|
if (scsi_low_is_msgout_continue(ti, 0) != 0)
|
|
{
|
|
scsi_low_attention(slp);
|
|
}
|
|
}
|
|
|
|
/* check REQ nagated */
|
|
nsp_negate_signal(sc, SCBUSMON_REQ, "msgin<REQ>");
|
|
|
|
/* deassert ack */
|
|
cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR) & (~SCBUSCR_ACK);
|
|
nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr);
|
|
|
|
/* catch a next signal */
|
|
rv = nsp_expect_signal(sc, PHASE_MSGIN, SCBUSMON_REQ);
|
|
}
|
|
while (rv > 0 && len -- > 0);
|
|
break;
|
|
|
|
default:
|
|
slp->sl_error |= FATALIO;
|
|
nsp_error(sc, "unknown scsi phase", isrc, ph, irqphs);
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
|
|
#if 0
|
|
timerout:
|
|
nsp_start_timer(sc, NSP_TIMER_1MS);
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
nsp_timeout(sc)
|
|
struct nsp_softc *sc;
|
|
{
|
|
struct scsi_low_softc *slp = &sc->sc_sclow;
|
|
bus_space_tag_t iot = sc->sc_iot;
|
|
bus_space_handle_t ioh = sc->sc_ioh;
|
|
int tout;
|
|
u_int8_t ph, regv;
|
|
|
|
if (slp->sl_Tnexus == NULL)
|
|
return 0;
|
|
|
|
ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON);
|
|
switch (ph & SCBUSMON_PHMASK)
|
|
{
|
|
case PHASE_DATAOUT:
|
|
if (sc->sc_dataout_timeout == 0)
|
|
break;
|
|
|
|
/* check a fifo empty */
|
|
regv = bus_space_read_1(iot, ioh, nsp_fifosr);
|
|
if ((regv & FIFOSR_FULLEMP) == 0)
|
|
break;
|
|
bus_space_write_1(iot, ioh, nsp_irqcr, IRQCR_FIFOCL);
|
|
|
|
/* check still requested */
|
|
ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON);
|
|
if ((ph & SCBUSMON_REQ) == 0)
|
|
break;
|
|
/* check timeout */
|
|
if ((-- sc->sc_dataout_timeout) > 0)
|
|
break;
|
|
|
|
slp->sl_error |= PDMAERR;
|
|
if ((slp->sl_flags & HW_WRITE_PADDING) == 0)
|
|
{
|
|
device_printf(slp->sl_dev, "write padding required\n");
|
|
break;
|
|
}
|
|
|
|
tout = NSP_DELAY_MAX;
|
|
while (tout -- > 0)
|
|
{
|
|
ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON);
|
|
if ((ph & SCBUSMON_PHMASK) != PHASE_DATAOUT)
|
|
break;
|
|
regv = bus_space_read_1(iot, ioh, nsp_fifosr);
|
|
if ((regv & FIFOSR_FULLEMP) == 0)
|
|
{
|
|
DELAY(1);
|
|
continue;
|
|
}
|
|
|
|
bus_space_write_1(iot, ioh, nsp_irqcr, IRQCR_FIFOCL);
|
|
nsp_data_padding(sc, SCSI_LOW_WRITE, 32);
|
|
}
|
|
ph = nsp_cr_read_1(iot, ioh, NSPR_SCBUSMON);
|
|
if ((ph & SCBUSMON_PHMASK) == PHASE_DATAOUT)
|
|
sc->sc_dataout_timeout = SCSI_LOW_TIMEOUT_HZ;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|