mirror of
https://git.FreeBSD.org/src.git
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d4fcf3cba5
and amd64. The optimization is a trivial on recent machines. Reviewed by: -arch (imp, marcel, dfr)
425 lines
11 KiB
C
425 lines
11 KiB
C
/*-
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* Copyright (c) 1996 - 2001 John Hay.
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* Copyright (c) 1996 SDL Communications, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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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/conf.h> /* cdevsw stuff */
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#include <sys/kernel.h> /* SYSINIT stuff */
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#include <sys/uio.h> /* SYSINIT stuff */
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#include <sys/malloc.h> /* malloc region definitions */
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <sys/time.h>
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#include <isa/isavar.h>
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#include "isa_if.h"
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#include <dev/ic/hd64570.h>
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#include <dev/sr/if_srregs.h>
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/*
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* List of valid interrupt numbers for the N2 ISA card.
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*/
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static int sr_irqtable[16] = {
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0, /* 0 */
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0, /* 1 */
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0, /* 2 */
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1, /* 3 */
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1, /* 4 */
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1, /* 5 */
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0, /* 6 */
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1, /* 7 */
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0, /* 8 */
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0, /* 9 */
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1, /* 10 */
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1, /* 11 */
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1, /* 12 */
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0, /* 13 */
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0, /* 14 */
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1 /* 15 */
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};
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static int sr_isa_probe (device_t);
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static int sr_isa_attach (device_t);
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static struct isa_pnp_id sr_ids[] = {
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{0, NULL}
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};
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static device_method_t sr_methods[] = {
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DEVMETHOD(device_probe, sr_isa_probe),
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DEVMETHOD(device_attach, sr_isa_attach),
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DEVMETHOD(device_detach, sr_detach),
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{ 0, 0 }
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};
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static driver_t sr_isa_driver = {
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"sr",
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sr_methods,
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sizeof (struct sr_hardc)
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};
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DRIVER_MODULE(sr, isa, sr_isa_driver, sr_devclass, 0, 0);
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MODULE_DEPEND(sr, isa, 1, 1, 1);
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static u_int src_get8_io(struct sr_hardc *hc, u_int off);
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static u_int src_get16_io(struct sr_hardc *hc, u_int off);
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static void src_put8_io(struct sr_hardc *hc, u_int off, u_int val);
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static void src_put16_io(struct sr_hardc *hc, u_int off, u_int val);
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static u_int src_dpram_size(device_t device);
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/*
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* Probe for an ISA card. If it is there, size its memory. Then get the
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* rest of its information and fill it in.
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*/
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static int
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sr_isa_probe (device_t device)
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{
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struct sr_hardc *hc;
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int error;
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u_int32_t flags;
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u_int i, tmp;
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u_long irq, junk, membase, memsize;
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sca_regs *sca = 0;
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error = ISA_PNP_PROBE(device_get_parent(device), device, sr_ids);
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if (error == ENXIO || error == 0)
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return (error);
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hc = device_get_softc(device);
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bzero(hc, sizeof(struct sr_hardc));
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if (sr_allocate_ioport(device, 0, SRC_IO_SIZ)) {
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return (ENXIO);
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}
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/*
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* Now see if the card is realy there.
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*/
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hc->cardtype = SR_CRD_N2;
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hc->cunit = device_get_unit(device);
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/*
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* We have to fill these in early because the SRC_PUT* and SRC_GET*
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* macros use them.
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*/
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hc->src_get8 = src_get8_io;
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hc->src_get16 = src_get16_io;
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hc->src_put8 = src_put8_io;
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hc->src_put16 = src_put16_io;
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hc->sca = 0;
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hc->numports = NCHAN; /* assumed # of channels on the card */
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flags = device_get_flags(device);
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if (flags & SR_FLAGS_NCHAN_MSK)
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hc->numports = flags & SR_FLAGS_NCHAN_MSK;
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sr_outb(hc, SR_PCR, 0); /* turn off the card */
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/*
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* Next, we'll test the Base Address Register to retension of
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* data... ... seeing if we're *really* talking to an N2.
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*/
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for (i = 0; i < 0x100; i++) {
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sr_outb(hc, SR_BAR, i);
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sr_inb(hc, SR_PCR);
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tmp = sr_inb(hc, SR_BAR);
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if (tmp != i) {
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printf("sr%d: probe failed BAR %x, %x.\n",
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hc->cunit, i, tmp);
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goto errexit;
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}
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}
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/*
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* Now see if we can see the SCA.
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*/
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sr_outb(hc, SR_PCR, SR_PCR_SCARUN | sr_inb(hc, SR_PCR));
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SRC_PUT8(hc, sca->wcrl, 0);
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SRC_PUT8(hc, sca->wcrm, 0);
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SRC_PUT8(hc, sca->wcrh, 0);
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SRC_PUT8(hc, sca->pcr, 0);
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SRC_PUT8(hc, sca->msci[0].tmc, 0);
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sr_inb(hc, 0);
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tmp = SRC_GET8(hc, sca->msci[0].tmc);
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if (tmp != 0) {
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printf("sr%d: Error reading SCA 0, %x\n", hc->cunit, tmp);
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goto errexit;
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}
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SRC_PUT8(hc, sca->msci[0].tmc, 0x5A);
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sr_inb(hc, 0);
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tmp = SRC_GET8(hc, sca->msci[0].tmc);
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if (tmp != 0x5A) {
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printf("sr%d: Error reading SCA 0x5A, %x\n", hc->cunit, tmp);
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goto errexit;
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}
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SRC_PUT16(hc, sca->dmac[0].cda, 0);
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sr_inb(hc, 0);
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tmp = SRC_GET16(hc, sca->dmac[0].cda);
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if (tmp != 0) {
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printf("sr%d: Error reading SCA 0, %x\n", hc->cunit, tmp);
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goto errexit;
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}
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SRC_PUT16(hc, sca->dmac[0].cda, 0x55AA);
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sr_inb(hc, 0);
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tmp = SRC_GET16(hc, sca->dmac[0].cda);
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if (tmp != 0x55AA) {
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printf("sr%d: Error reading SCA 0x55AA, %x\n",
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hc->cunit, tmp);
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goto errexit;
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}
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membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
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memsize = SRC_WIN_SIZ;
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if (bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize))
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goto errexit;
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if (sr_allocate_memory(device, 0, SRC_WIN_SIZ))
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goto errexit;
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if (src_dpram_size(device) < 4)
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goto errexit;
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if (sr_allocate_irq(device, 0, 1))
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goto errexit;
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if (bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
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goto errexit;
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}
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/*
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* Do a little sanity check.
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*/
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if (sr_irqtable[irq] == 0)
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printf("sr%d: Warning: illegal interrupt %ld chosen.\n",
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hc->cunit, irq);
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/*
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* Bogus card configuration
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*/
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if ((hc->numports > NCHAN) /* only 2 ports/card */
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||(hc->memsize > (512 * 1024))) /* no more than 256K */
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goto errexit;
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sr_deallocate_resources(device);
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return (0);
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errexit:
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sr_deallocate_resources(device);
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return (ENXIO);
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}
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/*
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* srattach_isa and srattach_pci allocate memory for hardc, softc and
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* data buffers. It also does any initialization that is bus specific.
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* At the end they call the common srattach() function.
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*/
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static int
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sr_isa_attach (device_t device)
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{
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u_char mar;
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u_int32_t flags;
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struct sr_hardc *hc;
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hc = device_get_softc(device);
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bzero(hc, sizeof(struct sr_hardc));
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if (sr_allocate_ioport(device, 0, SRC_IO_SIZ))
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goto errexit;
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if (sr_allocate_memory(device, 0, SRC_WIN_SIZ))
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goto errexit;
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if (sr_allocate_irq(device, 0, 1))
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goto errexit;
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/*
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* We have to fill these in early because the SRC_PUT* and SRC_GET*
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* macros use them.
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*/
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hc->src_get8 = src_get8_io;
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hc->src_get16 = src_get16_io;
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hc->src_put8 = src_put8_io;
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hc->src_put16 = src_put16_io;
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hc->cardtype = SR_CRD_N2;
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hc->cunit = device_get_unit(device);
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hc->sca = 0;
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hc->numports = NCHAN; /* assumed # of channels on the card */
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flags = device_get_flags(device);
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if (flags & SR_FLAGS_NCHAN_MSK)
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hc->numports = flags & SR_FLAGS_NCHAN_MSK;
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hc->mem_start = (caddr_t)rman_get_virtual(hc->res_memory);
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hc->mem_end = hc->mem_start + SRC_WIN_SIZ;
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hc->mem_pstart = 0;
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hc->winmsk = SRC_WIN_MSK;
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hc->mempages = src_dpram_size(device);
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hc->memsize = hc->mempages * SRC_WIN_SIZ;
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sr_outb(hc, SR_PCR, sr_inb(hc, SR_PCR) | SR_PCR_SCARUN);
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sr_outb(hc, SR_PSR, sr_inb(hc, SR_PSR) | SR_PSR_EN_SCA_DMA);
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sr_outb(hc, SR_MCR,
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SR_MCR_DTR0 | SR_MCR_DTR1 | SR_MCR_TE0 | SR_MCR_TE1);
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SRC_SET_ON(hc);
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/*
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* Configure the card. Mem address, irq,
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*/
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mar = (rman_get_start(hc->res_memory) >> 16) & SR_PCR_16M_SEL;
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sr_outb(hc, SR_PCR, mar | (sr_inb(hc, SR_PCR) & ~SR_PCR_16M_SEL));
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mar = rman_get_start(hc->res_memory) >> 12;
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sr_outb(hc, SR_BAR, mar);
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return sr_attach(device);
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errexit:
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sr_deallocate_resources(device);
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return (ENXIO);
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}
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/*
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* I/O for ISA N2 card(s)
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*/
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#define SRC_REG(y) ((((y) & 0xf) + (((y) & 0xf0) << 6)) | 0x8000)
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static u_int
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src_get8_io(struct sr_hardc *hc, u_int off)
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{
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return bus_space_read_1(hc->bt_ioport, hc->bh_ioport, SRC_REG(off));
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}
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static u_int
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src_get16_io(struct sr_hardc *hc, u_int off)
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{
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return bus_space_read_2(hc->bt_ioport, hc->bh_ioport, SRC_REG(off));
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}
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static void
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src_put8_io(struct sr_hardc *hc, u_int off, u_int val)
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{
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bus_space_write_1(hc->bt_ioport, hc->bh_ioport, SRC_REG(off), val);
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}
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static void
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src_put16_io(struct sr_hardc *hc, u_int off, u_int val)
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{
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bus_space_write_2(hc->bt_ioport, hc->bh_ioport, SRC_REG(off), val);
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}
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static u_int
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src_dpram_size(device_t device)
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{
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u_int pgs, i;
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u_short *smem;
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u_char mar;
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u_long membase;
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struct sr_hardc *hc;
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hc = device_get_softc(device);
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/*
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* OK, the board's interface registers seem to work. Now we'll see
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* if the Dual-Ported RAM is fully accessible...
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*/
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sr_outb(hc, SR_PCR, SR_PCR_EN_VPM | SR_PCR_ISA16);
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sr_outb(hc, SR_PSR, SR_PSR_WIN_16K);
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/*
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* Take the kernel "virtual" address supplied to us and convert
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* it to a "real" address. Then program the card to use that.
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*/
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membase = rman_get_start(hc->res_memory);
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mar = (membase >> 16) & SR_PCR_16M_SEL;
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sr_outb(hc, SR_PCR, mar | sr_inb(hc, SR_PCR));
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mar = membase >> 12;
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sr_outb(hc, SR_BAR, mar);
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sr_outb(hc, SR_PCR, sr_inb(hc, SR_PCR) | SR_PCR_MEM_WIN);
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smem = (u_short *)rman_get_virtual(hc->res_memory);/* DP RAM Address */
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/*
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* Here we will perform the memory scan to size the device.
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*
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* This is done by marking each potential page with a magic number.
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* We then loop through the pages looking for that magic number. As
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* soon as we no longer see that magic number, we'll quit the scan,
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* knowing that no more memory is present. This provides the number
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* of pages present on the card.
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*
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* Note: We're sizing 16K memory granules.
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*/
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for (i = 0; i <= SR_PSR_PG_SEL; i++) {
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sr_outb(hc, SR_PSR, (sr_inb(hc, SR_PSR) & ~SR_PSR_PG_SEL) | i);
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*smem = 0xAA55;
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}
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for (i = 0; i <= SR_PSR_PG_SEL; i++) {
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sr_outb(hc, SR_PSR, (sr_inb(hc, SR_PSR) & ~SR_PSR_PG_SEL) | i);
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if (*smem != 0xAA55) {
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/*
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* If we have less than 64k of memory, give up. That
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* is 4 x 16k pages.
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*/
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if (i < 4) {
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printf("sr%d: Bad mem page %d, mem %x, %x.\n",
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hc->cunit, i, 0xAA55, *smem);
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return 0;
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}
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break;
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}
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*smem = i;
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}
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hc->mempages = i;
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hc->memsize = i * SRC_WIN_SIZ;
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hc->winmsk = SRC_WIN_MSK;
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pgs = i; /* final count of 16K pages */
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/*
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* This next loop erases the contents of that page in DPRAM
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*/
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for (i = 0; i <= pgs; i++) {
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sr_outb(hc, SR_PSR, (sr_inb(hc, SR_PSR) & ~SR_PSR_PG_SEL) | i);
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bzero(smem, SRC_WIN_SIZ);
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}
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SRC_SET_OFF(hc);
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return (pgs);
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}
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