336dd1864d
correctly. This fixes resource allocation for various PnP ed cards but there are other problems which prevent that driver from working right.
768 lines
19 KiB
C
768 lines
19 KiB
C
/*
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* Copyright (c) 1996, Sujal M. Patel
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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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*
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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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* $FreeBSD$
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* from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp
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*/
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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/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <isa/isavar.h>
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#include <isa/pnpreg.h>
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#include <isa/pnpvar.h>
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#include <machine/resource.h>
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#include <machine/clock.h>
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typedef struct _pnp_id {
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u_int32_t vendor_id;
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u_int32_t serial;
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u_char checksum;
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} pnp_id;
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struct pnp_set_config_arg {
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int csn; /* Card number to configure */
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int ldn; /* Logical device on card */
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};
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struct pnp_quirk {
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u_int32_t vendor_id; /* Vendor of the card */
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u_int32_t logical_id; /* ID of the device with quirk */
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int type;
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#define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */
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int arg1;
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int arg2;
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};
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struct pnp_quirk pnp_quirks[] = {
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/*
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* The Gravis UltraSound needs register 0xf2 to be set to 0xff
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* to enable power.
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* XXX need to know the logical device id.
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*/
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{ 0x0100561e /* GRV0001 */, 0,
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PNP_QUIRK_WRITE_REG, 0xf2, 0xff },
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{ 0 }
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};
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#if 0
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/*
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* these entries are initialized using the autoconfig menu
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* The struct is invalid (and must be initialized) if the first
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* CSN is zero. The init code fills invalid entries with CSN 255
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* which is not a supported value.
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*/
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struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = {
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{ 0 }
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};
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#endif
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/* The READ_DATA port that we are using currently */
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static int pnp_rd_port;
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static void pnp_send_initiation_key(void);
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static int pnp_get_serial(pnp_id *p);
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static int pnp_isolation_protocol(device_t parent);
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static void
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pnp_write(int d, u_char r)
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{
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outb (_PNP_ADDRESS, d);
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outb (_PNP_WRITE_DATA, r);
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}
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#if 0
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static u_char
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pnp_read(int d)
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{
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outb (_PNP_ADDRESS, d);
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return (inb(3 | (pnp_rd_port <<2)));
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}
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#endif
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/*
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* Send Initiation LFSR as described in "Plug and Play ISA Specification",
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* Intel May 94.
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*/
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static void
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pnp_send_initiation_key()
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{
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int cur, i;
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/* Reset the LSFR */
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outb(_PNP_ADDRESS, 0);
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outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */
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cur = 0x6a;
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outb(_PNP_ADDRESS, cur);
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for (i = 1; i < 32; i++) {
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cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff);
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outb(_PNP_ADDRESS, cur);
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}
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}
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/*
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* Get the device's serial number. Returns 1 if the serial is valid.
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*/
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static int
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pnp_get_serial(pnp_id *p)
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{
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int i, bit, valid = 0, sum = 0x6a;
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u_char *data = (u_char *)p;
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bzero(data, sizeof(char) * 9);
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outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION);
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for (i = 0; i < 72; i++) {
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bit = inb((pnp_rd_port << 2) | 0x3) == 0x55;
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DELAY(250); /* Delay 250 usec */
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/* Can't Short Circuit the next evaluation, so 'and' is last */
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bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit;
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DELAY(250); /* Delay 250 usec */
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valid = valid || bit;
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if (i < 64)
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sum = (sum >> 1) |
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(((sum ^ (sum >> 1) ^ bit) << 7) & 0xff);
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data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0);
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}
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valid = valid && (data[8] == sum);
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return valid;
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}
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/*
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* Fill's the buffer with resource info from the device.
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* Returns 0 if the device fails to report
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*/
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static int
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pnp_get_resource_info(u_char *buffer, int len)
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{
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int i, j;
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u_char temp;
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for (i = 0; i < len; i++) {
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outb(_PNP_ADDRESS, PNP_STATUS);
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for (j = 0; j < 100; j++) {
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if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1)
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break;
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DELAY(1);
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}
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if (j == 100) {
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printf("PnP device failed to report resource data\n");
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return 0;
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}
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outb(_PNP_ADDRESS, PNP_RESOURCE_DATA);
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temp = inb((pnp_rd_port << 2) | 0x3);
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if (buffer != NULL)
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buffer[i] = temp;
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}
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return 1;
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}
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#if 0
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/*
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* write_pnp_parms initializes a logical device with the parms
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* in d, and then activates the board if the last parameter is 1.
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*/
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static int
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write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn)
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{
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int i, empty = -1 ;
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pnp_write (SET_LDN, ldn );
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i = pnp_read(SET_LDN) ;
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if (i != ldn) {
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printf("Warning: LDN %d does not exist\n", ldn);
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}
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for (i = 0; i < 8; i++) {
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pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 );
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pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff );
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}
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for (i = 0; i < 4; i++) {
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pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff );
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pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff );
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pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff );
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pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff );
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pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff );
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}
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for (i = 0; i < 2; i++) {
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pnp_write(IRQ_CONFIG + i*2 , d->irq[i] );
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pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] );
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pnp_write(DRQ_CONFIG + i, d->drq[i] );
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}
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/*
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* store parameters read into the current kernel
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* so manual editing next time is easier
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*/
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for (i = 0 ; i < MAX_PNP_LDN; i++) {
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if (pnp_ldn_overrides[i].csn == d->csn &&
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pnp_ldn_overrides[i].ldn == ldn) {
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d->flags = pnp_ldn_overrides[i].flags ;
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pnp_ldn_overrides[i] = *d ;
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break ;
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} else if (pnp_ldn_overrides[i].csn < 1 ||
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pnp_ldn_overrides[i].csn == 255)
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empty = i ;
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}
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if (i== MAX_PNP_LDN && empty != -1)
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pnp_ldn_overrides[empty] = *d;
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/*
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* Here should really perform the range check, and
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* return a failure if not successful.
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*/
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pnp_write (IO_RANGE_CHECK, 0);
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DELAY(1000); /* XXX is it really necessary ? */
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pnp_write (ACTIVATE, d->enable ? 1 : 0);
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DELAY(1000); /* XXX is it really necessary ? */
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return 1 ;
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}
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#endif
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/*
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* This function is called after the bus has assigned resource
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* locations for a logical device.
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*/
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static void
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pnp_set_config(void *arg, struct isa_config *config, int enable)
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{
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int csn = ((struct pnp_set_config_arg *) arg)->csn;
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int ldn = ((struct pnp_set_config_arg *) arg)->ldn;
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int i;
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/*
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* First put all cards into Sleep state with the initiation
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* key, then put our card into Config state.
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*/
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pnp_send_initiation_key();
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pnp_write(PNP_WAKE, csn);
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/*
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* Select our logical device so that we can program it.
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*/
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pnp_write(PNP_SET_LDN, ldn);
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/*
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* Now program the resources.
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*/
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for (i = 0; i < config->ic_nmem; i++) {
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u_int32_t start = config->ic_mem[i].ir_start;
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u_int32_t size = config->ic_mem[i].ir_size;
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if (start & 0xff)
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panic("pnp_set_config: bogus memory assignment");
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pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff);
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pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff);
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pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff);
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pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff);
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}
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for (; i < ISA_NMEM; i++) {
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pnp_write(PNP_MEM_BASE_HIGH(i), 0);
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pnp_write(PNP_MEM_BASE_LOW(i), 0);
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pnp_write(PNP_MEM_RANGE_HIGH(i), 0);
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pnp_write(PNP_MEM_RANGE_LOW(i), 0);
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}
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for (i = 0; i < config->ic_nport; i++) {
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u_int32_t start = config->ic_port[i].ir_start;
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pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff);
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pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff);
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}
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for (; i < ISA_NPORT; i++) {
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pnp_write(PNP_IO_BASE_HIGH(i), 0);
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pnp_write(PNP_IO_BASE_LOW(i), 0);
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}
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for (i = 0; i < config->ic_nirq; i++) {
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int irq = ffs(config->ic_irqmask[i]) - 1;
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pnp_write(PNP_IRQ_LEVEL(i), irq);
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pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */
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}
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for (; i < ISA_NIRQ; i++) {
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/*
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* IRQ 0 is not a valid interrupt selection and
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* represents no interrupt selection.
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*/
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pnp_write(PNP_IRQ_LEVEL(i), 0);
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}
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for (i = 0; i < config->ic_ndrq; i++) {
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int drq = ffs(config->ic_drqmask[i]) - 1;
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pnp_write(PNP_DMA_CHANNEL(i), drq);
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}
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for (; i < ISA_NDRQ; i++) {
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/*
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* DMA channel 4, the cascade channel is used to
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* indicate no DMA channel is active.
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*/
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pnp_write(PNP_DMA_CHANNEL(i), 4);
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}
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pnp_write(PNP_ACTIVATE, enable ? 1 : 0);
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/*
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* Wake everyone up again, we are finished.
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*/
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pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
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}
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/*
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* Process quirks for a logical device.. The card must be in Config state.
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*/
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static void
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pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn)
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{
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struct pnp_quirk *qp;
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for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) {
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if (qp->vendor_id == vendor_id
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&& (qp->logical_id == 0
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|| qp->logical_id == logical_id)) {
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switch (qp->type) {
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case PNP_QUIRK_WRITE_REG:
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pnp_write(PNP_SET_LDN, ldn);
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pnp_write(qp->arg1, qp->arg2);
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break;
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}
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}
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}
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}
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/*
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* Scan Resource Data for Logical Devices.
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*
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* This function exits as soon as it gets an error reading *ANY*
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* Resource Data or ir reaches the end of Resource Data. In the first
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* case the return value will be TRUE, FALSE otherwise.
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*/
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static int
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pnp_scan_resdata(device_t parent, pnp_id *p, int csn)
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{
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u_char tag, resinfo[16];
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int large_len, scanning = 1024, retval = FALSE;
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u_int32_t logical_id;
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u_int32_t compat_id;
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device_t dev = 0;
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int ldn = 0;
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struct isa_config card, logdev, alt;
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struct isa_config *config;
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struct pnp_set_config_arg *csnldn;
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int priority = 0;
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int seenalt = 0;
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char *desc = 0;
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bzero(&card, sizeof card);
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bzero(&logdev, sizeof logdev);
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bzero(&alt, sizeof alt);
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config = &card;
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while (scanning-- > 0 && pnp_get_resource_info(&tag, 1)) {
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if (PNP_RES_TYPE(tag) == 0) {
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/* Small resource */
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if (pnp_get_resource_info(resinfo,
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PNP_SRES_LEN(tag)) == 0) {
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scanning = 0;
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continue;
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}
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switch (PNP_SRES_NUM(tag)) {
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case PNP_TAG_LOGICAL_DEVICE:
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/*
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* A new logical device. Scan
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* resourcea and add device.
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*/
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bcopy(resinfo, &logical_id, 4);
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pnp_check_quirks(p->vendor_id,
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logical_id,
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ldn);
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compat_id = 0;
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logdev = card;
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config = &logdev;
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dev = BUS_ADD_CHILD(parent,
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ISA_ORDER_PNP, NULL, -1);
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if (desc)
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device_set_desc_copy(dev, desc);
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isa_set_vendorid(dev, p->vendor_id);
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isa_set_serial(dev, p->serial);
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isa_set_logicalid(dev, logical_id);
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csnldn = malloc(sizeof *csnldn,
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M_DEVBUF, M_NOWAIT);
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if (!csnldn) {
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device_printf(parent,
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"out of memory\n");
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scanning = 0;
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break;
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}
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csnldn->csn = csn;
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csnldn->ldn = ldn;
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ISA_SET_CONFIG_CALLBACK(parent, dev,
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pnp_set_config,
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csnldn);
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seenalt = 0;
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ldn++;
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break;
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case PNP_TAG_COMPAT_DEVICE:
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/*
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* Got a compatible device id
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* resource. Should keep a list of
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* compat ids in the device.
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*/
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bcopy(resinfo, &compat_id, 4);
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if (dev)
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isa_set_compatid(dev, compat_id);
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break;
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case PNP_TAG_IRQ_FORMAT:
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if (config->ic_nirq == ISA_NIRQ) {
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device_printf(parent,
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"CSN %d too many irqs",
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csn);
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scanning = 0;
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break;
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}
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config->ic_irqmask[config->ic_nirq] =
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resinfo[0] + (resinfo[1]<<8);
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config->ic_nirq++;
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break;
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case PNP_TAG_DMA_FORMAT:
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if (config->ic_ndrq == ISA_NDRQ) {
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device_printf(parent,
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"CSN %d too many drqs",
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csn);
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scanning = 0;
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break;
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}
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config->ic_drqmask[config->ic_ndrq] =
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resinfo[0];
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config->ic_ndrq++;
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break;
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case PNP_TAG_START_DEPENDANT:
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if (config == &alt) {
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ISA_ADD_CONFIG(parent, dev,
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priority, config);
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} else if (config != &logdev) {
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device_printf(parent,
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"CSN %d malformed\n",
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csn);
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scanning = 0;
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break;
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}
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/*
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* If the priority is not specified,
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* then use the default of
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* 'acceptable'
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*/
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if (PNP_SRES_LEN(tag) > 0)
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priority = resinfo[0];
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else
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priority = 1;
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alt = logdev;
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config = &alt;
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break;
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|
|
case PNP_TAG_END_DEPENDANT:
|
|
ISA_ADD_CONFIG(parent, dev, priority, config);
|
|
config = &logdev;
|
|
seenalt = 1;
|
|
break;
|
|
|
|
case PNP_TAG_IO_RANGE:
|
|
if (config->ic_nport == ISA_NPORT) {
|
|
device_printf(parent,
|
|
"CSN %d too many ports",
|
|
csn);
|
|
scanning = 0;
|
|
break;
|
|
}
|
|
config->ic_port[config->ic_nport].ir_start =
|
|
resinfo[1] + (resinfo[2]<<8);
|
|
config->ic_port[config->ic_nport].ir_end =
|
|
resinfo[3] + (resinfo[4]<<8)
|
|
+ resinfo[6] - 1;
|
|
config->ic_port[config->ic_nport].ir_size
|
|
=
|
|
resinfo[6];
|
|
config->ic_port[config->ic_nport].ir_align =
|
|
resinfo[5];
|
|
config->ic_nport++;
|
|
break;
|
|
|
|
case PNP_TAG_IO_FIXED:
|
|
if (config->ic_nport == ISA_NPORT) {
|
|
device_printf(parent,
|
|
"CSN %d too many ports",
|
|
csn);
|
|
scanning = 0;
|
|
break;
|
|
}
|
|
config->ic_port[config->ic_nport].ir_start =
|
|
resinfo[0] + (resinfo[1]<<8);
|
|
config->ic_port[config->ic_nport].ir_end =
|
|
resinfo[0] + (resinfo[1]<<8)
|
|
+ resinfo[2] - 1;
|
|
config->ic_port[config->ic_nport].ir_size
|
|
= resinfo[2];
|
|
config->ic_port[config->ic_nport].ir_align = 1;
|
|
config->ic_nport++;
|
|
break;
|
|
|
|
case PNP_TAG_END:
|
|
if (!seenalt)
|
|
ISA_ADD_CONFIG(parent, dev,
|
|
priority, config);
|
|
scanning = 0;
|
|
break;
|
|
|
|
default:
|
|
/* Skip this resource */
|
|
break;
|
|
}
|
|
} else {
|
|
/* Large resource */
|
|
if (pnp_get_resource_info(resinfo, 2) == 0) {
|
|
scanning = 0;
|
|
continue;
|
|
}
|
|
large_len = resinfo[0] + (resinfo[1] << 8);
|
|
|
|
if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) {
|
|
if (desc)
|
|
free(desc, M_TEMP);
|
|
desc = malloc(large_len + 1,
|
|
M_TEMP, M_NOWAIT);
|
|
/*
|
|
* Note: if malloc fails, this will
|
|
* skip the resource instead of
|
|
* reading it into desc.
|
|
*/
|
|
if (pnp_get_resource_info(desc,
|
|
large_len) == 0) {
|
|
scanning = 0;
|
|
}
|
|
if (desc) {
|
|
/*
|
|
* Trim trailing spaces.
|
|
*/
|
|
while (desc[large_len-1] == ' ')
|
|
large_len--;
|
|
desc[large_len] = '\0';
|
|
if (dev)
|
|
device_set_desc_copy
|
|
(dev, desc);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (PNP_LRES_NUM(tag) != PNP_TAG_MEMORY_RANGE) {
|
|
/* skip */
|
|
if (pnp_get_resource_info(NULL,
|
|
large_len) == 0) {
|
|
scanning = 0;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (pnp_get_resource_info(resinfo, large_len) == 0) {
|
|
scanning = 0;
|
|
continue;
|
|
}
|
|
|
|
if (config->ic_nmem == ISA_NMEM) {
|
|
device_printf(parent,
|
|
"CSN %d too many memory ranges",
|
|
csn);
|
|
scanning = 0;
|
|
break;
|
|
}
|
|
|
|
config->ic_mem[config->ic_nmem].ir_start =
|
|
(resinfo[4]<<8) + (resinfo[5]<<16);
|
|
config->ic_mem[config->ic_nmem].ir_end =
|
|
(resinfo[6]<<8) + (resinfo[7]<<16);
|
|
config->ic_mem[config->ic_nmem].ir_size =
|
|
(resinfo[10]<<8) + (resinfo[11]<<16);
|
|
config->ic_mem[config->ic_nmem].ir_align =
|
|
resinfo[8] + (resinfo[9]<<8);
|
|
if (!config->ic_mem[config->ic_nmem].ir_align)
|
|
config->ic_mem[config->ic_nmem].ir_align =
|
|
0x10000;
|
|
config->ic_nmem++;
|
|
}
|
|
}
|
|
|
|
if (desc)
|
|
free(desc, M_TEMP);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Run the isolation protocol. Use pnp_rd_port as the READ_DATA port
|
|
* value (caller should try multiple READ_DATA locations before giving
|
|
* up). Upon exiting, all cards are aware that they should use
|
|
* pnp_rd_port as the READ_DATA port.
|
|
*
|
|
* In the first pass, a csn is assigned to each board and pnp_id's
|
|
* are saved to an array, pnp_devices. In the second pass, each
|
|
* card is woken up and the device configuration is called.
|
|
*/
|
|
static int
|
|
pnp_isolation_protocol(device_t parent)
|
|
{
|
|
int csn;
|
|
pnp_id id;
|
|
int found = 0;
|
|
|
|
/*
|
|
* Put all cards into the Sleep state so that we can clear
|
|
* their CSNs.
|
|
*/
|
|
pnp_send_initiation_key();
|
|
|
|
/*
|
|
* Clear the CSN for all cards.
|
|
*/
|
|
pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN);
|
|
|
|
/*
|
|
* Move all cards to the Isolation state.
|
|
*/
|
|
pnp_write(PNP_WAKE, 0);
|
|
|
|
/*
|
|
* Tell them where the read point is going to be this time.
|
|
*/
|
|
pnp_write(PNP_SET_RD_DATA, pnp_rd_port);
|
|
|
|
for (csn = 1; csn < PNP_MAX_CARDS; csn++) {
|
|
/*
|
|
* Start the serial isolation protocol.
|
|
*/
|
|
outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION);
|
|
DELAY(1000); /* Delay 1 msec */
|
|
|
|
if (pnp_get_serial(&id)) {
|
|
/*
|
|
* We have read the id from a card
|
|
* successfully. The card which won the
|
|
* isolation protocol will be in Isolation
|
|
* mode and all others will be in Sleep. *
|
|
* Program the CSN of the isolated card
|
|
* (taking it to Config state) and read its
|
|
* resources, creating devices as we find
|
|
* logical devices on the card.
|
|
*/
|
|
pnp_write(PNP_SET_CSN, csn);
|
|
pnp_scan_resdata(parent, &id, csn);
|
|
found++;
|
|
} else
|
|
break;
|
|
|
|
/*
|
|
* Put this card back to the Sleep state and
|
|
* simultaneously move all cards which don't have a
|
|
* CSN yet to Isolation state.
|
|
*/
|
|
pnp_write(PNP_WAKE, 0);
|
|
}
|
|
|
|
/*
|
|
* Unless we have chosen the wrong read port, all cards will
|
|
* be in Sleep state. Put them back into WaitForKey for
|
|
* now. Their resources will be programmed later.
|
|
*/
|
|
pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
|
|
|
|
return found;
|
|
}
|
|
|
|
|
|
/*
|
|
* pnp_identify()
|
|
*
|
|
* autoconfiguration of pnp devices. This routine just runs the
|
|
* isolation protocol over several ports, until one is successful.
|
|
*
|
|
* may be called more than once ?
|
|
*
|
|
*/
|
|
|
|
static void
|
|
pnp_identify(driver_t *driver, device_t parent)
|
|
{
|
|
int num_pnp_devs;
|
|
|
|
#if 0
|
|
if (pnp_ldn_overrides[0].csn == 0) {
|
|
if (bootverbose)
|
|
printf("Initializing PnP override table\n");
|
|
bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides));
|
|
pnp_ldn_overrides[0].csn = 255 ;
|
|
}
|
|
#endif
|
|
|
|
/* Try various READ_DATA ports from 0x203-0x3ff */
|
|
for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) {
|
|
if (bootverbose)
|
|
printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3);
|
|
|
|
num_pnp_devs = pnp_isolation_protocol(parent);
|
|
if (num_pnp_devs)
|
|
break;
|
|
}
|
|
}
|
|
|
|
static device_method_t pnp_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_identify, pnp_identify),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t pnp_driver = {
|
|
"pnp",
|
|
pnp_methods,
|
|
1, /* no softc */
|
|
};
|
|
|
|
static devclass_t pnp_devclass;
|
|
|
|
DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);
|