FreeBSD-5.3/sys/dev/sr/if_sr_isa.c
/*
* Copyright (c) 1996 - 2001 John Hay.
* Copyright (c) 1996 SDL Communications, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/sr/if_sr_isa.c,v 1.49 2003/08/24 18:17:23 obrien Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h> /* cdevsw stuff */
#include <sys/kernel.h> /* SYSINIT stuff */
#include <sys/uio.h> /* SYSINIT stuff */
#include <sys/malloc.h> /* malloc region definitions */
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <sys/rman.h>
#include <sys/time.h>
#include <isa/isavar.h>
#include "isa_if.h"
#include <dev/ic/hd64570.h>
#include <dev/sr/if_srregs.h>
/*
* List of valid interrupt numbers for the N2 ISA card.
*/
static int sr_irqtable[16] = {
0, /* 0 */
0, /* 1 */
0, /* 2 */
1, /* 3 */
1, /* 4 */
1, /* 5 */
0, /* 6 */
1, /* 7 */
0, /* 8 */
0, /* 9 */
1, /* 10 */
1, /* 11 */
1, /* 12 */
0, /* 13 */
0, /* 14 */
1 /* 15 */
};
static int sr_isa_probe (device_t);
static int sr_isa_attach (device_t);
static struct isa_pnp_id sr_ids[] = {
{0, NULL}
};
static device_method_t sr_methods[] = {
DEVMETHOD(device_probe, sr_isa_probe),
DEVMETHOD(device_attach, sr_isa_attach),
DEVMETHOD(device_detach, sr_detach),
{ 0, 0 }
};
static driver_t sr_isa_driver = {
"sr",
sr_methods,
sizeof (struct sr_hardc)
};
DRIVER_MODULE(sr, isa, sr_isa_driver, sr_devclass, 0, 0);
MODULE_DEPEND(sr, isa, 1, 1, 1);
static u_int src_get8_io(struct sr_hardc *hc, u_int off);
static u_int src_get16_io(struct sr_hardc *hc, u_int off);
static void src_put8_io(struct sr_hardc *hc, u_int off, u_int val);
static void src_put16_io(struct sr_hardc *hc, u_int off, u_int val);
static u_int src_dpram_size(device_t device);
/*
* Probe for an ISA card. If it is there, size its memory. Then get the
* rest of its information and fill it in.
*/
static int
sr_isa_probe (device_t device)
{
struct sr_hardc *hc;
int error;
u_int32_t flags;
u_int i, tmp;
u_long irq, junk, membase, memsize;
sca_regs *sca = 0;
error = ISA_PNP_PROBE(device_get_parent(device), device, sr_ids);
if (error == ENXIO || error == 0)
return (error);
hc = device_get_softc(device);
bzero(hc, sizeof(struct sr_hardc));
if (sr_allocate_ioport(device, 0, SRC_IO_SIZ)) {
return (ENXIO);
}
/*
* Now see if the card is realy there.
*/
hc->cardtype = SR_CRD_N2;
hc->cunit = device_get_unit(device);
/*
* We have to fill these in early because the SRC_PUT* and SRC_GET*
* macros use them.
*/
hc->src_get8 = src_get8_io;
hc->src_get16 = src_get16_io;
hc->src_put8 = src_put8_io;
hc->src_put16 = src_put16_io;
hc->sca = 0;
hc->numports = NCHAN; /* assumed # of channels on the card */
flags = device_get_flags(device);
if (flags & SR_FLAGS_NCHAN_MSK)
hc->numports = flags & SR_FLAGS_NCHAN_MSK;
sr_outb(hc, SR_PCR, 0); /* turn off the card */
/*
* Next, we'll test the Base Address Register to retension of
* data... ... seeing if we're *really* talking to an N2.
*/
for (i = 0; i < 0x100; i++) {
sr_outb(hc, SR_BAR, i);
sr_inb(hc, SR_PCR);
tmp = sr_inb(hc, SR_BAR);
if (tmp != i) {
printf("sr%d: probe failed BAR %x, %x.\n",
hc->cunit, i, tmp);
goto errexit;
}
}
/*
* Now see if we can see the SCA.
*/
sr_outb(hc, SR_PCR, SR_PCR_SCARUN | sr_inb(hc, SR_PCR));
SRC_PUT8(hc, sca->wcrl, 0);
SRC_PUT8(hc, sca->wcrm, 0);
SRC_PUT8(hc, sca->wcrh, 0);
SRC_PUT8(hc, sca->pcr, 0);
SRC_PUT8(hc, sca->msci[0].tmc, 0);
sr_inb(hc, 0);
tmp = SRC_GET8(hc, sca->msci[0].tmc);
if (tmp != 0) {
printf("sr%d: Error reading SCA 0, %x\n", hc->cunit, tmp);
goto errexit;
}
SRC_PUT8(hc, sca->msci[0].tmc, 0x5A);
sr_inb(hc, 0);
tmp = SRC_GET8(hc, sca->msci[0].tmc);
if (tmp != 0x5A) {
printf("sr%d: Error reading SCA 0x5A, %x\n", hc->cunit, tmp);
goto errexit;
}
SRC_PUT16(hc, sca->dmac[0].cda, 0);
sr_inb(hc, 0);
tmp = SRC_GET16(hc, sca->dmac[0].cda);
if (tmp != 0) {
printf("sr%d: Error reading SCA 0, %x\n", hc->cunit, tmp);
goto errexit;
}
SRC_PUT16(hc, sca->dmac[0].cda, 0x55AA);
sr_inb(hc, 0);
tmp = SRC_GET16(hc, sca->dmac[0].cda);
if (tmp != 0x55AA) {
printf("sr%d: Error reading SCA 0x55AA, %x\n",
hc->cunit, tmp);
goto errexit;
}
membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
memsize = SRC_WIN_SIZ;
if (bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize))
goto errexit;
if (sr_allocate_memory(device, 0, SRC_WIN_SIZ))
goto errexit;
if (src_dpram_size(device) < 4)
goto errexit;
if (sr_allocate_irq(device, 0, 1))
goto errexit;
if (bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
goto errexit;
}
/*
* Do a little sanity check.
*/
if (sr_irqtable[irq] == 0)
printf("sr%d: Warning: illegal interrupt %ld chosen.\n",
hc->cunit, irq);
/*
* Bogus card configuration
*/
if ((hc->numports > NCHAN) /* only 2 ports/card */
||(hc->memsize > (512 * 1024))) /* no more than 256K */
goto errexit;
sr_deallocate_resources(device);
return (0);
errexit:
sr_deallocate_resources(device);
return (ENXIO);
}
/*
* srattach_isa and srattach_pci allocate memory for hardc, softc and
* data buffers. It also does any initialization that is bus specific.
* At the end they call the common srattach() function.
*/
static int
sr_isa_attach (device_t device)
{
u_char mar;
u_int32_t flags;
struct sr_hardc *hc;
hc = device_get_softc(device);
bzero(hc, sizeof(struct sr_hardc));
if (sr_allocate_ioport(device, 0, SRC_IO_SIZ))
goto errexit;
if (sr_allocate_memory(device, 0, SRC_WIN_SIZ))
goto errexit;
if (sr_allocate_irq(device, 0, 1))
goto errexit;
/*
* We have to fill these in early because the SRC_PUT* and SRC_GET*
* macros use them.
*/
hc->src_get8 = src_get8_io;
hc->src_get16 = src_get16_io;
hc->src_put8 = src_put8_io;
hc->src_put16 = src_put16_io;
hc->cardtype = SR_CRD_N2;
hc->cunit = device_get_unit(device);
hc->sca = 0;
hc->numports = NCHAN; /* assumed # of channels on the card */
flags = device_get_flags(device);
if (flags & SR_FLAGS_NCHAN_MSK)
hc->numports = flags & SR_FLAGS_NCHAN_MSK;
hc->mem_start = (caddr_t)rman_get_virtual(hc->res_memory);
hc->mem_end = hc->mem_start + SRC_WIN_SIZ;
hc->mem_pstart = 0;
hc->winmsk = SRC_WIN_MSK;
hc->mempages = src_dpram_size(device);
hc->memsize = hc->mempages * SRC_WIN_SIZ;
sr_outb(hc, SR_PCR, sr_inb(hc, SR_PCR) | SR_PCR_SCARUN);
sr_outb(hc, SR_PSR, sr_inb(hc, SR_PSR) | SR_PSR_EN_SCA_DMA);
sr_outb(hc, SR_MCR,
SR_MCR_DTR0 | SR_MCR_DTR1 | SR_MCR_TE0 | SR_MCR_TE1);
SRC_SET_ON(hc);
/*
* Configure the card. Mem address, irq,
*/
mar = (rman_get_start(hc->res_memory) >> 16) & SR_PCR_16M_SEL;
sr_outb(hc, SR_PCR, mar | (sr_inb(hc, SR_PCR) & ~SR_PCR_16M_SEL));
mar = rman_get_start(hc->res_memory) >> 12;
sr_outb(hc, SR_BAR, mar);
return sr_attach(device);
errexit:
sr_deallocate_resources(device);
return (ENXIO);
}
/*
* I/O for ISA N2 card(s)
*/
#define SRC_REG(y) ((((y) & 0xf) + (((y) & 0xf0) << 6)) | 0x8000)
static u_int
src_get8_io(struct sr_hardc *hc, u_int off)
{
return bus_space_read_1(hc->bt_ioport, hc->bh_ioport, SRC_REG(off));
}
static u_int
src_get16_io(struct sr_hardc *hc, u_int off)
{
return bus_space_read_2(hc->bt_ioport, hc->bh_ioport, SRC_REG(off));
}
static void
src_put8_io(struct sr_hardc *hc, u_int off, u_int val)
{
bus_space_write_1(hc->bt_ioport, hc->bh_ioport, SRC_REG(off), val);
}
static void
src_put16_io(struct sr_hardc *hc, u_int off, u_int val)
{
bus_space_write_2(hc->bt_ioport, hc->bh_ioport, SRC_REG(off), val);
}
static u_int
src_dpram_size(device_t device)
{
u_int pgs, i;
u_short *smem;
u_char mar;
u_long membase;
struct sr_hardc *hc;
hc = device_get_softc(device);
/*
* OK, the board's interface registers seem to work. Now we'll see
* if the Dual-Ported RAM is fully accessible...
*/
sr_outb(hc, SR_PCR, SR_PCR_EN_VPM | SR_PCR_ISA16);
sr_outb(hc, SR_PSR, SR_PSR_WIN_16K);
/*
* Take the kernel "virtual" address supplied to us and convert
* it to a "real" address. Then program the card to use that.
*/
membase = rman_get_start(hc->res_memory);
mar = (membase >> 16) & SR_PCR_16M_SEL;
sr_outb(hc, SR_PCR, mar | sr_inb(hc, SR_PCR));
mar = membase >> 12;
sr_outb(hc, SR_BAR, mar);
sr_outb(hc, SR_PCR, sr_inb(hc, SR_PCR) | SR_PCR_MEM_WIN);
smem = (u_short *)rman_get_virtual(hc->res_memory);/* DP RAM Address */
/*
* Here we will perform the memory scan to size the device.
*
* This is done by marking each potential page with a magic number.
* We then loop through the pages looking for that magic number. As
* soon as we no longer see that magic number, we'll quit the scan,
* knowing that no more memory is present. This provides the number
* of pages present on the card.
*
* Note: We're sizing 16K memory granules.
*/
for (i = 0; i <= SR_PSR_PG_SEL; i++) {
sr_outb(hc, SR_PSR, (sr_inb(hc, SR_PSR) & ~SR_PSR_PG_SEL) | i);
*smem = 0xAA55;
}
for (i = 0; i <= SR_PSR_PG_SEL; i++) {
sr_outb(hc, SR_PSR, (sr_inb(hc, SR_PSR) & ~SR_PSR_PG_SEL) | i);
if (*smem != 0xAA55) {
/*
* If we have less than 64k of memory, give up. That
* is 4 x 16k pages.
*/
if (i < 4) {
printf("sr%d: Bad mem page %d, mem %x, %x.\n",
hc->cunit, i, 0xAA55, *smem);
return 0;
}
break;
}
*smem = i;
}
hc->mempages = i;
hc->memsize = i * SRC_WIN_SIZ;
hc->winmsk = SRC_WIN_MSK;
pgs = i; /* final count of 16K pages */
/*
* This next loop erases the contents of that page in DPRAM
*/
for (i = 0; i <= pgs; i++) {
sr_outb(hc, SR_PSR, (sr_inb(hc, SR_PSR) & ~SR_PSR_PG_SEL) | i);
bzero(smem, SRC_WIN_SIZ);
}
SRC_SET_OFF(hc);
return (pgs);
}