560 lines
16 KiB
C
560 lines
16 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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* $Id: pnp.c,v 1.4 1997/11/18 11:45:26 bde 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> /* for DATA_SET */
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#include <sys/malloc.h>
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#include <sys/interrupt.h>
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#include <machine/clock.h>
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#include <machine/md_var.h>
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#include <i386/isa/icu.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/pnp.h>
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static int num_pnp_cards = 0;
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pnp_id pnp_devices[MAX_PNP_CARDS];
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struct pnp_dlist_node *pnp_device_list;
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static struct pnp_dlist_node **pnp_device_list_last_ptr;
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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] = { { 0 } };
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/*
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* the following is a flag which tells if the data is valid.
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*/
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static int doing_pnp_probe = 0 ;
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static int current_csn ;
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static int current_pnp_id ;
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static int current_pnp_serial ;
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/*
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* the following block is an example on what is needed for
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* a PnP device driver.
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*/
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static char* nullpnp_probe(u_long csn, u_long vendor_id);
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static void nullpnp_attach(u_long csn, u_long vendor_id, char *name,
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struct isa_device *dev);
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static u_long nullpnp_count = 0 ;
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static struct pnp_device nullpnp_device = {
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"goodpnp",
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nullpnp_probe,
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nullpnp_attach,
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&nullpnp_count,
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NULL /* imask */
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};
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DATA_SET (pnpdevice_set, nullpnp_device);
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static char*
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nullpnp_probe(u_long tag, u_long type)
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{
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if (bootverbose)
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printf("Called nullpnp_probe with tag 0x%08lx, type 0x%08lx\n",
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tag, type);
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return NULL;
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}
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static void
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nullpnp_attach(u_long csn, u_long vend_id, char *name,
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struct isa_device *dev)
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{
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printf("nullpnp_attach: csn %ld, vend_id 0x%08lx name %s unit %d\n",
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csn, vend_id, name, dev->id_unit);
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return;
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}
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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_LFSR (void);
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static int pnp_get_serial (pnp_id *p);
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static void config_pnp_device (pnp_id *p, int csn);
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static int pnp_isolation_protocol (void);
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void pnp_write(int d, u_char r);
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u_char pnp_read(int d);
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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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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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/*
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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_LFSR()
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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, 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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* read_pnp_parms loads pnp parameters from the currently selected
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* device into the struct pnp_cinfo parameter passed.
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* The second argument specifies the Logical Device to use.
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*/
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int
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read_pnp_parms(struct pnp_cinfo *d, int ldn)
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{
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int i ;
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if (doing_pnp_probe == 0 || d == NULL)
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return 0 ; /* fail */
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bzero(d, sizeof(struct pnp_cinfo));
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d->vendor_id = current_pnp_id ;
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d->serial = current_pnp_serial ;
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d->csn = current_csn ;
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d->ldn = ldn ; /* XXX this should be different ... */
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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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d->port[i] = pnp_read(IO_CONFIG_BASE + i * 2) << 8 ;
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d->port[i] |= pnp_read(IO_CONFIG_BASE + i * 2 + 1);
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if (i < 4) {
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d->mem[i].base = pnp_read (MEM_CONFIG + i*8) << 16 ;
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d->mem[i].base |= pnp_read (MEM_CONFIG + i*8 + 1) << 8 ;
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d->mem[i].control = pnp_read (MEM_CONFIG + i*8 + 2) ;
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d->mem[i].range = pnp_read (MEM_CONFIG + i*8 + 3) << 16 ;
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d->mem[i].range |= pnp_read (MEM_CONFIG + i*8 + 4) << 8 ;
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}
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if (i < 2) {
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d->irq[i] = pnp_read(IRQ_CONFIG + i * 2);
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d->irq_type[i] = pnp_read(IRQ_CONFIG + 1 + i * 2);
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d->drq[i] = pnp_read(DRQ_CONFIG + i);
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}
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}
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d->enable = pnp_read(ACTIVATE);
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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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d->override = pnp_ldn_overrides[i].override ;
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break ;
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}
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}
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if (bootverbose)
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printf("port 0x%04x 0x%04x 0x%04x 0x%04x irq %d:%d drq %d:%d en %d\n",
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d->port[0], d->port[1], d->port[2], d->port[3],
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d->irq[0], d->irq[1],
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d->drq[0], d->drq[1],
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d->enable);
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return 1 ; /* success */
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}
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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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int
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write_pnp_parms(struct pnp_cinfo *d, int ldn)
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{
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int i, empty = -1 ;
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/*
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* some safety checks first.
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*/
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if (doing_pnp_probe == 0 || d==NULL || d->vendor_id != current_pnp_id)
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return 0 ; /* fail */
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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->port[i] >> 8 );
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pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->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->mem[i].base >> 16) & 0xff );
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pnp_write(MEM_CONFIG + i*8+1, (d->mem[i].base >> 8) & 0xff );
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pnp_write(MEM_CONFIG + i*8+2, d->mem[i].control & 0xff );
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pnp_write(MEM_CONFIG + i*8+3, (d->mem[i].range >> 16) & 0xff );
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pnp_write(MEM_CONFIG + i*8+4, (d->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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/*
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* To finalize a card's initialization, and before accessing its
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* registers, we need to bring the card in WaitForKey. To this purpose,
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* we need to issue a WaitForKey command, which brings _all_ cards
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* in that state. So, before configuring the next board, we must also
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* sent the Init-Key to bring cards to the SLEEP state again.
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*
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* In fact, one could hope that cards respond to normal I/O accesses
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* even in the SLEEP state, which could be done by issuing a WAKE[0].
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* This seems to work on the CS4236, but not on the CS4232 on my Zappa
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* motherboard .
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*/
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int
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enable_pnp_card()
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{
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/* the next wake should bring the card in WaitForKey ? */
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pnp_write (WAKE, 0);
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pnp_write(CONFIG_CONTROL, 0x02); /* All cards in WaitForKey */
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DELAY(1000); /* XXX is it really necessary ? */
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return 1 ; /* success */
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}
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/*
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* Configure PnP devices. pnp_id is made of:
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* 4 bytes: board id (which can be printed as an ascii string);
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* 4 bytes: board serial number (often 0 or -1 ?)
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*/
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static void
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config_pnp_device(pnp_id *p, int csn)
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{
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static struct pnp_dlist_node *nod = NULL;
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int i;
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u_char *data = (u_char *)p;
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/* these are for autoconfigure a-la pci */
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struct pnp_device *dvp, **dvpp;
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char *name ;
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printf("CSN %d Vendor ID: %c%c%c%02x%02x [0x%08lx] Serial 0x%08lx\n", csn,
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((data[0] & 0x7c) >> 2) + '@',
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(((data[0] & 0x03) << 3) | ((data[1] & 0xe0) >> 5)) + '@',
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(data[1] & 0x1f) + '@', data[2], data[3], p->vendor_id, p->serial);
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doing_pnp_probe = 1 ;
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current_csn = csn ;
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current_pnp_id = p->vendor_id ;
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current_pnp_serial = p->serial ;
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/*
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* use kernel table to override possible devices
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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 == csn &&
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pnp_ldn_overrides[i].override == 1) {
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struct pnp_cinfo d;
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if (bootverbose)
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printf("PnP: override config for CSN %d LDN %d "
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"vend_id 0x%08x\n", csn, pnp_ldn_overrides[i].ldn,
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current_pnp_id);
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/* next assignement is done otherwise read fails */
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d.vendor_id = current_pnp_id ;
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read_pnp_parms(&d, pnp_ldn_overrides[i].ldn);
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if (pnp_ldn_overrides[i].enable == 0) {
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/* just disable ... */
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d.enable = 0;
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write_pnp_parms(&d, pnp_ldn_overrides[i].ldn);
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} else {
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/* set all parameters */
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/* next assignement is done otherwise write fails */
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pnp_ldn_overrides[i].vendor_id = current_pnp_id ;
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write_pnp_parms(&pnp_ldn_overrides[i],
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pnp_ldn_overrides[i].ldn);
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}
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}
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}
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/* lookup device in ioconfiguration */
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dvpp = (struct pnp_device **)pnpdevice_set.ls_items;
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while ((dvp = *dvpp++)) {
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if (dvp->pd_probe) {
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if ((name = (*dvp->pd_probe)(csn, p->vendor_id)))
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break;
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}
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}
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if (dvp && name && dvp->pd_count) { /* found a matching device */
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int unit ;
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/* pnpcb->pnpcb_seen |= ( 1ul << csn ) ; */
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/* get and increment the unit */
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unit = (*dvp->pd_count)++;
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/*
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* now call the attach routine. The board has not been
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* configured yet, so better not access isa registers in
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* the attach routine until enable_pnp_card() has been done.
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*/
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if (nod == NULL)
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nod = malloc(sizeof(struct pnp_dlist_node), M_DEVBUF, M_NOWAIT);
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if (nod == NULL)
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panic("malloc failed for PnP resource use");
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bzero(nod, sizeof(*nod));
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nod->pnp = dvp;
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nod->dev.id_unit = unit ;
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if (dvp->pd_attach)
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(*dvp->pd_attach) (csn, p->vendor_id, name, &(nod->dev));
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printf("%s%d (%s <%s> sn 0x%08lx)", nod->dev.id_driver &&
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nod->dev.id_driver->name ? nod->dev.id_driver->name : "unknown",
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unit, dvp->pd_name, name, p->serial);
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if (nod->dev.id_alive) {
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if (nod->dev.id_irq) {
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/* the board uses interrupts. Register it. */
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if (dvp->imask)
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INTRMASK( *(dvp->imask), nod->dev.id_irq );
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register_intr(ffs(nod->dev.id_irq) - 1, nod->dev.id_id,
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nod->dev.id_ri_flags, nod->dev.id_intr,
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dvp->imask, nod->dev.id_unit);
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INTREN(nod->dev.id_irq);
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}
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if (nod->dev.id_alive != 0) {
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if (nod->dev.id_iobase == -1)
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printf(" at ?");
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else {
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printf(" at 0x%x", nod->dev.id_iobase);
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if ((nod->dev.id_iobase + nod->dev.id_alive -1) !=
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nod->dev.id_iobase) {
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printf("-0x%x", nod->dev.id_iobase + nod->dev.id_alive
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- 1);
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}
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}
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}
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if (nod->dev.id_irq)
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printf(" irq %d", ffs(nod->dev.id_irq) - 1);
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if (nod->dev.id_drq != -1)
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printf(" drq %d", nod->dev.id_drq);
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if (nod->dev.id_maddr)
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printf(" maddr 0x%lx", kvtop(nod->dev.id_maddr));
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if (nod->dev.id_msize)
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printf(" msize %d", nod->dev.id_msize);
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if (nod->dev.id_flags)
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printf(" flags 0x%x", nod->dev.id_flags);
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if (nod->dev.id_iobase && !(nod->dev.id_iobase & 0xf300)) {
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printf(" on motherboard");
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printf(" id %d", nod->dev.id_id);
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} else if (nod->dev.id_iobase >= 0x1000 &&
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!(nod->dev.id_iobase & 0x300)) {
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printf (" on eisa slot %d",
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nod->dev.id_iobase >> 12);
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} else {
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printf (" on isa");
|
|
}
|
|
printf("\n");
|
|
if (pnp_device_list_last_ptr == NULL)
|
|
pnp_device_list = nod;
|
|
else
|
|
*pnp_device_list_last_ptr = nod;
|
|
pnp_device_list_last_ptr = &(nod->next);
|
|
nod = NULL;
|
|
} else
|
|
printf(" failed to attach\n");
|
|
}
|
|
doing_pnp_probe = 0 ;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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()
|
|
{
|
|
int csn;
|
|
|
|
pnp_send_Initiation_LFSR();
|
|
|
|
pnp_write(CONFIG_CONTROL, 0x04); /* Reset CSN for All Cards */
|
|
|
|
for (csn = 1; (csn < MAX_PNP_CARDS); csn++) {
|
|
/* Wake up cards without a CSN */
|
|
pnp_write(WAKE, 0);
|
|
pnp_write(SET_RD_DATA, pnp_rd_port);
|
|
outb(_PNP_ADDRESS, SERIAL_ISOLATION);
|
|
DELAY(1000); /* Delay 1 msec */
|
|
|
|
if (pnp_get_serial( &(pnp_devices[csn-1]) ) ) {
|
|
pnp_write(SET_CSN, csn);
|
|
/* pnp_write(CONFIG_CONTROL, 2); */
|
|
} else
|
|
break;
|
|
}
|
|
num_pnp_cards = csn - 1;
|
|
for (csn = 1; csn <= num_pnp_cards ; csn++) {
|
|
/*
|
|
* make sure cards are in SLEEP state
|
|
*/
|
|
pnp_send_Initiation_LFSR();
|
|
pnp_write(WAKE, csn);
|
|
config_pnp_device( &(pnp_devices[csn-1]), csn);
|
|
/*
|
|
* Put all cards in WaitForKey, just in case the previous
|
|
* attach routine forgot it.
|
|
*/
|
|
pnp_write(CONFIG_CONTROL, 0x02);
|
|
DELAY(1000); /* XXX is it really necessary ? */
|
|
}
|
|
return num_pnp_cards ;
|
|
}
|
|
|
|
|
|
/*
|
|
* pnp_configure()
|
|
*
|
|
* autoconfiguration of pnp devices. This routine just runs the
|
|
* isolation protocol over several ports, until one is successful.
|
|
*
|
|
* may be called more than once ?
|
|
*
|
|
*/
|
|
|
|
void
|
|
pnp_configure()
|
|
{
|
|
int num_pnp_devs;
|
|
|
|
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 ;
|
|
}
|
|
printf("Probing for PnP devices:\n");
|
|
|
|
/* 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();
|
|
if (num_pnp_devs)
|
|
break;
|
|
}
|
|
if (!num_pnp_devs) {
|
|
if (bootverbose)
|
|
printf("No Plug-n-Play devices were found\n");
|
|
return;
|
|
}
|
|
}
|