717 lines
16 KiB
C
717 lines
16 KiB
C
/* $NetBSD: pckbc.c,v 1.32 2004/03/24 17:26:53 drochner Exp $ */
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/*
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* Copyright (c) 2004 Ben Harris.
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* Copyright (c) 1998
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* Matthias Drochner. 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pckbc.c,v 1.32 2004/03/24 17:26:53 drochner Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/errno.h>
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#include <sys/queue.h>
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#include <sys/lock.h>
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#include <machine/bus.h>
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#include <dev/ic/i8042reg.h>
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#include <dev/ic/pckbcvar.h>
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#include <dev/pckbport/pckbportvar.h>
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#include "rnd.h"
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#include "locators.h"
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#if NRND > 0
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#include <sys/rnd.h>
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#endif
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/* data per slave device */
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struct pckbc_slotdata {
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int polling; /* don't process data in interrupt handler */
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int poll_data; /* data read from inr handler if polling */
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int poll_stat; /* status read from inr handler if polling */
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#if NRND > 0
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rndsource_element_t rnd_source;
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#endif
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};
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static void pckbc_init_slotdata __P((struct pckbc_slotdata *));
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static int pckbc_attach_slot __P((struct pckbc_softc *, pckbc_slot_t));
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struct pckbc_internal pckbc_consdata;
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int pckbc_console_attached;
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static int pckbc_console;
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static struct pckbc_slotdata pckbc_cons_slotdata;
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static int pckbc_xt_translation __P((void *, pckbport_slot_t, int));
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static int pckbc_send_devcmd __P((void *, pckbport_slot_t, u_char));
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static void pckbc_slot_enable __P((void *, pckbport_slot_t, int));
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static void pckbc_intr_establish __P((void *, pckbport_slot_t));
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static void pckbc_set_poll __P((void *, pckbc_slot_t, int on));
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static int pckbc_wait_output __P((bus_space_tag_t, bus_space_handle_t));
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static int pckbc_get8042cmd __P((struct pckbc_internal *));
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static int pckbc_put8042cmd __P((struct pckbc_internal *));
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void pckbc_cleanqueue __P((struct pckbc_slotdata *));
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void pckbc_cleanup __P((void *));
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int pckbc_cmdresponse __P((struct pckbc_internal *, pckbc_slot_t, u_char));
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void pckbc_start __P((struct pckbc_internal *, pckbc_slot_t));
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const char * const pckbc_slot_names[] = { "kbd", "aux" };
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static struct pckbport_accessops const pckbc_ops = {
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pckbc_xt_translation,
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pckbc_send_devcmd,
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pckbc_poll_data1,
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pckbc_slot_enable,
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pckbc_intr_establish,
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pckbc_set_poll
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};
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#define KBD_DELAY DELAY(8)
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static inline int
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pckbc_wait_output(iot, ioh_c)
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bus_space_tag_t iot;
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bus_space_handle_t ioh_c;
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{
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u_int i;
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for (i = 100000; i; i--)
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if (!(bus_space_read_1(iot, ioh_c, 0) & KBS_IBF)) {
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KBD_DELAY;
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return (1);
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}
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return (0);
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}
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int
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pckbc_send_cmd(iot, ioh_c, val)
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bus_space_tag_t iot;
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bus_space_handle_t ioh_c;
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u_char val;
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{
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if (!pckbc_wait_output(iot, ioh_c))
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return (0);
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bus_space_write_1(iot, ioh_c, 0, val);
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return (1);
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}
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/*
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* Note: the spl games here are to deal with some strange PC kbd controllers
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* in some system configurations.
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* This is not canonical way to handle polling input.
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*/
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int
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pckbc_poll_data1(pt, slot)
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void *pt;
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pckbc_slot_t slot;
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{
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struct pckbc_internal *t = pt;
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struct pckbc_slotdata *q = t->t_slotdata[slot];
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int s;
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u_char stat, c;
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int i = 100000; /* if 1 port read takes 1us (?), this polls for 100ms */
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int checkaux = t->t_haveaux;
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s = splhigh();
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if (q && q->polling && q->poll_data != -1 && q->poll_stat != -1) {
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stat = q->poll_stat;
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c = q->poll_data;
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q->poll_data = -1;
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q->poll_stat = -1;
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goto process;
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}
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for (; i; i--) {
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stat = bus_space_read_1(t->t_iot, t->t_ioh_c, 0);
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if (stat & KBS_DIB) {
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KBD_DELAY;
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c = bus_space_read_1(t->t_iot, t->t_ioh_d, 0);
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process:
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if (checkaux && (stat & 0x20)) { /* aux data */
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if (slot != PCKBC_AUX_SLOT) {
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#ifdef PCKBCDEBUG
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printf("lost aux 0x%x\n", c);
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#endif
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continue;
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}
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} else {
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if (slot == PCKBC_AUX_SLOT) {
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#ifdef PCKBCDEBUG
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printf("lost kbd 0x%x\n", c);
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#endif
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continue;
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}
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}
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splx(s);
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return (c);
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}
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}
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splx(s);
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return (-1);
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}
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/*
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* Get the current command byte.
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*/
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static int
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pckbc_get8042cmd(t)
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struct pckbc_internal *t;
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{
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bus_space_tag_t iot = t->t_iot;
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bus_space_handle_t ioh_c = t->t_ioh_c;
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int data;
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if (!pckbc_send_cmd(iot, ioh_c, K_RDCMDBYTE))
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return (0);
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data = pckbc_poll_data1(t, PCKBC_KBD_SLOT);
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if (data == -1)
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return (0);
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t->t_cmdbyte = data;
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return (1);
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}
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/*
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* Pass command byte to keyboard controller (8042).
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*/
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static int
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pckbc_put8042cmd(t)
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struct pckbc_internal *t;
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{
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bus_space_tag_t iot = t->t_iot;
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bus_space_handle_t ioh_d = t->t_ioh_d;
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bus_space_handle_t ioh_c = t->t_ioh_c;
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if (!pckbc_send_cmd(iot, ioh_c, K_LDCMDBYTE))
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return (0);
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if (!pckbc_wait_output(iot, ioh_c))
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return (0);
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bus_space_write_1(iot, ioh_d, 0, t->t_cmdbyte);
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return (1);
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}
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static int
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pckbc_send_devcmd(pt, slot, val)
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void *pt;
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pckbc_slot_t slot;
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u_char val;
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{
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struct pckbc_internal *t = pt;
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bus_space_tag_t iot = t->t_iot;
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bus_space_handle_t ioh_d = t->t_ioh_d;
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bus_space_handle_t ioh_c = t->t_ioh_c;
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if (slot == PCKBC_AUX_SLOT) {
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if (!pckbc_send_cmd(iot, ioh_c, KBC_AUXWRITE))
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return (0);
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}
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if (!pckbc_wait_output(iot, ioh_c))
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return (0);
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bus_space_write_1(iot, ioh_d, 0, val);
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return (1);
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}
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int
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pckbc_is_console(iot, addr)
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bus_space_tag_t iot;
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bus_addr_t addr;
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{
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if (pckbc_console && !pckbc_console_attached &&
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pckbc_consdata.t_iot == iot &&
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pckbc_consdata.t_addr == addr)
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return (1);
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return (0);
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}
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static int
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pckbc_attach_slot(sc, slot)
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struct pckbc_softc *sc;
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pckbc_slot_t slot;
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{
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struct pckbc_internal *t = sc->id;
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struct pckbc_attach_args pa;
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void *sdata;
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struct device *child;
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int alloced = 0;
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pa.pa_tag = t;
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pa.pa_slot = slot;
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if (t->t_slotdata[slot] == NULL) {
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sdata = malloc(sizeof(struct pckbc_slotdata),
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M_DEVBUF, M_NOWAIT);
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if (sdata == NULL) {
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printf("%s: no memory\n", sc->sc_dv.dv_xname);
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return (0);
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}
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t->t_slotdata[slot] = sdata;
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pckbc_init_slotdata(t->t_slotdata[slot]);
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alloced++;
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}
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child = pckbport_attach_slot(&sc->sc_dv, t->t_pt, slot);
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if (child == NULL && alloced) {
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free(t->t_slotdata[slot], M_DEVBUF);
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t->t_slotdata[slot] = NULL;
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}
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#if NRND > 0
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if (child != NULL && t->t_slotdata[slot] != NULL)
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rnd_attach_source(&t->t_slotdata[slot]->rnd_source,
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child->dv_xname, RND_TYPE_TTY, 0);
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#endif
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return child != NULL;
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}
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void
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pckbc_attach(sc)
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struct pckbc_softc *sc;
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{
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struct pckbc_internal *t;
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bus_space_tag_t iot;
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bus_space_handle_t ioh_d, ioh_c;
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int res;
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u_char cmdbits = 0;
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t = sc->id;
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iot = t->t_iot;
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ioh_d = t->t_ioh_d;
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ioh_c = t->t_ioh_c;
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t->t_pt = pckbport_attach(t, &pckbc_ops);
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if (t->t_pt == NULL) {
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aprint_error(": attach failed\n");
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return;
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}
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/* flush */
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(void) pckbc_poll_data1(t, PCKBC_KBD_SLOT);
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/* set initial cmd byte */
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if (!pckbc_put8042cmd(t)) {
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printf("kbc: cmd word write error\n");
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return;
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}
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/*
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* XXX Don't check the keyboard port. There are broken keyboard controllers
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* which don't pass the test but work normally otherwise.
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*/
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#if 0
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/*
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* check kbd port ok
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*/
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if (!pckbc_send_cmd(iot, ioh_c, KBC_KBDTEST))
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return;
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res = pckbc_poll_data1(t, PCKBC_KBD_SLOT, 0);
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/*
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* Normally, we should get a "0" here.
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* But there are keyboard controllers behaving differently.
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*/
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if (res == 0 || res == 0xfa || res == 0x01 || res == 0xab) {
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#ifdef PCKBCDEBUG
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if (res != 0)
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printf("kbc: returned %x on kbd slot test\n", res);
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#endif
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if (pckbc_attach_slot(sc, PCKBC_KBD_SLOT))
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cmdbits |= KC8_KENABLE;
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} else {
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printf("kbc: kbd port test: %x\n", res);
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return;
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}
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#else
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if (pckbc_attach_slot(sc, PCKBC_KBD_SLOT))
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cmdbits |= KC8_KENABLE;
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#endif /* 0 */
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/*
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* Check aux port ok.
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* Avoid KBC_AUXTEST because it hangs some older controllers
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* (eg UMC880?).
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*/
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if (!pckbc_send_cmd(iot, ioh_c, KBC_AUXECHO)) {
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printf("kbc: aux echo error 1\n");
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goto nomouse;
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}
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if (!pckbc_wait_output(iot, ioh_c)) {
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printf("kbc: aux echo error 2\n");
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goto nomouse;
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}
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t->t_haveaux = 1;
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bus_space_write_1(iot, ioh_d, 0, 0x5a); /* a random value */
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res = pckbc_poll_data1(t, PCKBC_AUX_SLOT);
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if (res != -1) {
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/*
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* In most cases, the 0x5a gets echoed.
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* Some older controllers (Gateway 2000 circa 1993)
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* return 0xfe here.
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* We are satisfied if there is anything in the
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* aux output buffer.
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*/
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if (pckbc_attach_slot(sc, PCKBC_AUX_SLOT))
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cmdbits |= KC8_MENABLE;
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} else {
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#ifdef PCKBCDEBUG
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printf("kbc: aux echo test failed\n");
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#endif
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t->t_haveaux = 0;
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}
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nomouse:
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/* enable needed interrupts */
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t->t_cmdbyte |= cmdbits;
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if (!pckbc_put8042cmd(t))
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printf("kbc: cmd word write error\n");
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}
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static void
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pckbc_init_slotdata(q)
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struct pckbc_slotdata *q;
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{
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q->polling = 0;
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}
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/*
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* switch scancode translation on / off
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* return nonzero on success
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*/
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static int
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pckbc_xt_translation(self, slot, on)
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void *self;
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pckbc_slot_t slot;
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int on;
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{
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struct pckbc_internal *t = self;
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int ison;
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if (slot != PCKBC_KBD_SLOT) {
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/* translation only for kbd slot */
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if (on)
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return (0);
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else
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return (1);
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}
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ison = t->t_cmdbyte & KC8_TRANS;
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if ((on && ison) || (!on && !ison))
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return (1);
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t->t_cmdbyte ^= KC8_TRANS;
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if (!pckbc_put8042cmd(t))
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return (0);
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/* read back to be sure */
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if (!pckbc_get8042cmd(t))
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return (0);
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ison = t->t_cmdbyte & KC8_TRANS;
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if ((on && ison) || (!on && !ison))
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return (1);
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return (0);
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}
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static const struct pckbc_portcmd {
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u_char cmd_en, cmd_dis;
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} pckbc_portcmd[2] = {
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{
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KBC_KBDENABLE, KBC_KBDDISABLE,
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}, {
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KBC_AUXENABLE, KBC_AUXDISABLE,
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}
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};
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void
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pckbc_slot_enable(self, slot, on)
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void *self;
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pckbc_slot_t slot;
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int on;
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{
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struct pckbc_internal *t = (struct pckbc_internal *)self;
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const struct pckbc_portcmd *cmd;
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cmd = &pckbc_portcmd[slot];
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if (!pckbc_send_cmd(t->t_iot, t->t_ioh_c,
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on ? cmd->cmd_en : cmd->cmd_dis))
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printf("pckbc_slot_enable(%d) failed\n", on);
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}
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static void
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pckbc_set_poll(self, slot, on)
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void *self;
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pckbc_slot_t slot;
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int on;
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{
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struct pckbc_internal *t = (struct pckbc_internal *)self;
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t->t_slotdata[slot]->polling = on;
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if (on) {
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t->t_slotdata[slot]->poll_data = -1;
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t->t_slotdata[slot]->poll_stat = -1;
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} else {
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int s;
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/*
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* If disabling polling on a device that's been configured,
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* make sure there are no bytes left in the FIFO, holding up
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* the interrupt line. Otherwise we won't get any further
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* interrupts.
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*/
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if (t->t_sc) {
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s = spltty();
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pckbcintr(t->t_sc);
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splx(s);
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}
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}
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}
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static void
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pckbc_intr_establish(pt, slot)
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void *pt;
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pckbport_slot_t slot;
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{
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struct pckbc_internal *t = pt;
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(*t->t_sc->intr_establish)(t->t_sc, slot);
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}
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int
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pckbcintr_hard(vsc)
|
|
void *vsc;
|
|
{
|
|
struct pckbc_softc *sc = (struct pckbc_softc *)vsc;
|
|
struct pckbc_internal *t = sc->id;
|
|
u_char stat;
|
|
pckbc_slot_t slot;
|
|
struct pckbc_slotdata *q;
|
|
int served = 0, data, next, s;
|
|
|
|
for(;;) {
|
|
stat = bus_space_read_1(t->t_iot, t->t_ioh_c, 0);
|
|
if (!(stat & KBS_DIB))
|
|
break;
|
|
|
|
served = 1;
|
|
|
|
slot = (t->t_haveaux && (stat & 0x20)) ?
|
|
PCKBC_AUX_SLOT : PCKBC_KBD_SLOT;
|
|
q = t->t_slotdata[slot];
|
|
|
|
if (!q) {
|
|
/* XXX do something for live insertion? */
|
|
printf("pckbcintr: no dev for slot %d\n", slot);
|
|
KBD_DELAY;
|
|
(void) bus_space_read_1(t->t_iot, t->t_ioh_d, 0);
|
|
continue;
|
|
}
|
|
|
|
KBD_DELAY;
|
|
data = bus_space_read_1(t->t_iot, t->t_ioh_d, 0);
|
|
|
|
#if NRND > 0
|
|
rnd_add_uint32(&q->rnd_source, (stat<<8)|data);
|
|
#endif
|
|
|
|
if (q->polling) {
|
|
q->poll_data = data;
|
|
q->poll_stat = stat;
|
|
break; /* pckbc_poll_data() will get it */
|
|
}
|
|
|
|
#if 0 /* XXXBJH */
|
|
if (CMD_IN_QUEUE(q) && pckbc_cmdresponse(t, slot, data))
|
|
continue;
|
|
#endif
|
|
|
|
s = splhigh();
|
|
next = (t->rbuf_write+1) % PCKBC_RBUF_SIZE;
|
|
if (next == t->rbuf_read) {
|
|
splx(s);
|
|
break;
|
|
}
|
|
t->rbuf[t->rbuf_write].data = data;
|
|
t->rbuf[t->rbuf_write].slot = slot;
|
|
t->rbuf_write = next;
|
|
splx(s);
|
|
}
|
|
|
|
return (served);
|
|
}
|
|
|
|
void
|
|
pckbcintr_soft(vsc)
|
|
void *vsc;
|
|
{
|
|
struct pckbc_softc *sc = vsc;
|
|
struct pckbc_internal *t = sc->id;
|
|
int data, slot, s;
|
|
#ifndef __GENERIC_SOFT_INTERRUPTS_ALL_LEVELS
|
|
int st;
|
|
|
|
st = spltty();
|
|
#endif
|
|
|
|
s = splhigh();
|
|
while (t->rbuf_read != t->rbuf_write) {
|
|
slot = t->rbuf[t->rbuf_read].slot;
|
|
data = t->rbuf[t->rbuf_read].data;
|
|
t->rbuf_read = (t->rbuf_read+1) % PCKBC_RBUF_SIZE;
|
|
splx(s);
|
|
pckbportintr(t->t_pt, slot, data);
|
|
s = splhigh();
|
|
}
|
|
splx(s);
|
|
|
|
|
|
#ifndef __GENERIC_SOFT_INTERRUPTS_ALL_LEVELS
|
|
splx(st);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
pckbcintr(vsc)
|
|
void *vsc;
|
|
{
|
|
struct pckbc_softc *sc = (struct pckbc_softc *)vsc;
|
|
struct pckbc_internal *t = sc->id;
|
|
u_char stat;
|
|
pckbc_slot_t slot;
|
|
struct pckbc_slotdata *q;
|
|
int served = 0, data;
|
|
|
|
for(;;) {
|
|
stat = bus_space_read_1(t->t_iot, t->t_ioh_c, 0);
|
|
if (!(stat & KBS_DIB))
|
|
break;
|
|
|
|
served = 1;
|
|
|
|
slot = (t->t_haveaux && (stat & 0x20)) ?
|
|
PCKBC_AUX_SLOT : PCKBC_KBD_SLOT;
|
|
q = t->t_slotdata[slot];
|
|
|
|
KBD_DELAY;
|
|
data = bus_space_read_1(t->t_iot, t->t_ioh_d, 0);
|
|
|
|
#if NRND > 0
|
|
rnd_add_uint32(&q->rnd_source, (stat<<8)|data);
|
|
#endif
|
|
|
|
pckbportintr(t->t_pt, slot, data);
|
|
}
|
|
|
|
return (served);
|
|
}
|
|
|
|
int
|
|
pckbc_cnattach(iot, addr, cmd_offset, slot)
|
|
bus_space_tag_t iot;
|
|
bus_addr_t addr;
|
|
bus_size_t cmd_offset;
|
|
pckbc_slot_t slot;
|
|
{
|
|
bus_space_handle_t ioh_d, ioh_c;
|
|
#ifdef PCKBC_CNATTACH_SELFTEST
|
|
int reply;
|
|
#endif
|
|
int res = 0;
|
|
|
|
if (bus_space_map(iot, addr + KBDATAP, 1, 0, &ioh_d))
|
|
return (ENXIO);
|
|
if (bus_space_map(iot, addr + cmd_offset, 1, 0, &ioh_c)) {
|
|
bus_space_unmap(iot, ioh_d, 1);
|
|
return (ENXIO);
|
|
}
|
|
|
|
memset(&pckbc_consdata, 0, sizeof(pckbc_consdata));
|
|
pckbc_consdata.t_iot = iot;
|
|
pckbc_consdata.t_ioh_d = ioh_d;
|
|
pckbc_consdata.t_ioh_c = ioh_c;
|
|
pckbc_consdata.t_addr = addr;
|
|
callout_init(&pckbc_consdata.t_cleanup);
|
|
|
|
/* flush */
|
|
(void) pckbc_poll_data1(&pckbc_consdata, PCKBC_KBD_SLOT);
|
|
|
|
#ifdef PCKBC_CNATTACH_SELFTEST
|
|
/*
|
|
* In some machines (e.g. netwinder) pckbc refuses to talk at
|
|
* all until we request a self-test.
|
|
*/
|
|
if (!pckbc_send_cmd(iot, ioh_c, KBC_SELFTEST)) {
|
|
printf("kbc: unable to request selftest\n");
|
|
res = EIO;
|
|
goto out;
|
|
}
|
|
|
|
reply = pckbc_poll_data1(&pckbc_consdata, PCKBC_KBD_SLOT);
|
|
if (reply != 0x55) {
|
|
printf("kbc: selftest returned 0x%02x\n", reply);
|
|
res = EIO;
|
|
goto out;
|
|
}
|
|
#endif /* PCKBC_CNATTACH_SELFTEST */
|
|
|
|
/* init cmd byte, enable ports */
|
|
pckbc_consdata.t_cmdbyte = KC8_CPU;
|
|
if (!pckbc_put8042cmd(&pckbc_consdata)) {
|
|
printf("kbc: cmd word write error\n");
|
|
res = EIO;
|
|
goto out;
|
|
}
|
|
|
|
res = pckbport_cnattach(&pckbc_consdata, &pckbc_ops, slot);
|
|
|
|
out:
|
|
if (res) {
|
|
bus_space_unmap(iot, pckbc_consdata.t_ioh_d, 1);
|
|
bus_space_unmap(iot, pckbc_consdata.t_ioh_c, 1);
|
|
} else {
|
|
pckbc_consdata.t_slotdata[slot] = &pckbc_cons_slotdata;
|
|
pckbc_init_slotdata(&pckbc_cons_slotdata);
|
|
pckbc_console = 1;
|
|
}
|
|
|
|
return (res);
|
|
}
|