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Diffstat (limited to 'sys/dev/kbd/atkbdc.c')
| -rw-r--r-- | sys/dev/kbd/atkbdc.c | 1039 |
1 files changed, 1039 insertions, 0 deletions
diff --git a/sys/dev/kbd/atkbdc.c b/sys/dev/kbd/atkbdc.c new file mode 100644 index 0000000..8593368 --- /dev/null +++ b/sys/dev/kbd/atkbdc.c @@ -0,0 +1,1039 @@ +/*- + * Copyright (c) 1996-1999 + * Kazutaka YOKOTA (yokota@zodiac.mech.utsunomiya-u.ac.jp) + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + * from kbdio.c,v 1.13 1998/09/25 11:55:46 yokota Exp + */ + +#include "opt_kbd.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/malloc.h> +#include <sys/syslog.h> +#include <machine/bus_pio.h> +#include <machine/bus.h> +#include <machine/resource.h> +#include <sys/rman.h> + + +#include <dev/kbd/atkbdcreg.h> + +#include <isa/isareg.h> + +/* constants */ + +#define MAXKBDC 1 /* XXX */ + +/* macros */ + +#ifndef MAX +#define MAX(x, y) ((x) > (y) ? (x) : (y)) +#endif + +#define kbdcp(p) ((atkbdc_softc_t *)(p)) +#define nextq(i) (((i) + 1) % KBDQ_BUFSIZE) +#define availq(q) ((q)->head != (q)->tail) +#if KBDIO_DEBUG >= 2 +#define emptyq(q) ((q)->tail = (q)->head = (q)->qcount = 0) +#else +#define emptyq(q) ((q)->tail = (q)->head = 0) +#endif + +#define read_data(k) (bus_space_read_1((k)->iot, (k)->ioh0, 0)) +#define read_status(k) (bus_space_read_1((k)->iot, (k)->ioh1, 0)) +#define write_data(k, d) \ + (bus_space_write_1((k)->iot, (k)->ioh0, 0, (d))) +#define write_command(k, d) \ + (bus_space_write_1((k)->iot, (k)->ioh1, 0, (d))) + +/* local variables */ + +/* + * We always need at least one copy of the kbdc_softc struct for the + * low-level console. As the low-level console accesses the keyboard + * controller before kbdc, and all other devices, is probed, we + * statically allocate one entry. XXX + */ +static atkbdc_softc_t default_kbdc; +static atkbdc_softc_t *atkbdc_softc[MAXKBDC] = { &default_kbdc }; + +static int verbose = KBDIO_DEBUG; + +/* function prototypes */ + +static int atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag, + bus_space_handle_t h0, bus_space_handle_t h1); +static int addq(kqueue *q, int c); +static int removeq(kqueue *q); +static int wait_while_controller_busy(atkbdc_softc_t *kbdc); +static int wait_for_data(atkbdc_softc_t *kbdc); +static int wait_for_kbd_data(atkbdc_softc_t *kbdc); +static int wait_for_kbd_ack(atkbdc_softc_t *kbdc); +static int wait_for_aux_data(atkbdc_softc_t *kbdc); +static int wait_for_aux_ack(atkbdc_softc_t *kbdc); + +atkbdc_softc_t +*atkbdc_get_softc(int unit) +{ + atkbdc_softc_t *sc; + + if (unit >= sizeof(atkbdc_softc)/sizeof(atkbdc_softc[0])) + return NULL; + sc = atkbdc_softc[unit]; + if (sc == NULL) { + sc = atkbdc_softc[unit] + = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT | M_ZERO); + if (sc == NULL) + return NULL; + } + return sc; +} + +int +atkbdc_probe_unit(int unit, struct resource *port0, struct resource *port1) +{ + if (rman_get_start(port0) <= 0) + return ENXIO; + if (rman_get_start(port1) <= 0) + return ENXIO; + return 0; +} + +int +atkbdc_attach_unit(int unit, atkbdc_softc_t *sc, struct resource *port0, + struct resource *port1) +{ + return atkbdc_setup(sc, rman_get_bustag(port0), + rman_get_bushandle(port0), + rman_get_bushandle(port1)); +} + +/* the backdoor to the keyboard controller! XXX */ +int +atkbdc_configure(void) +{ + bus_space_tag_t tag; + bus_space_handle_t h0; + bus_space_handle_t h1; + int port0; + int port1; + + port0 = IO_KBD; + resource_int_value("atkbdc", 0, "port", &port0); + port1 = IO_KBD + KBD_STATUS_PORT; +#if 0 + resource_int_value("atkbdc", 0, "port", &port0); +#endif + + /* XXX: tag should be passed from the caller */ +#if defined(__i386__) + tag = I386_BUS_SPACE_IO; +#elif defined(__alpha__) + tag = busspace_isa_io; +#elif defined(__ia64__) + tag = IA64_BUS_SPACE_IO; +#else +#error "define tag!" +#endif + +#if notyet + bus_space_map(tag, port0, IO_KBDSIZE, 0, &h0); + bus_space_map(tag, port1, IO_KBDSIZE, 0, &h1); +#else + h0 = (bus_space_handle_t)port0; + h1 = (bus_space_handle_t)port1; +#endif + return atkbdc_setup(atkbdc_softc[0], tag, h0, h1); +} + +static int +atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag, bus_space_handle_t h0, + bus_space_handle_t h1) +{ + if (sc->ioh0 == 0) { /* XXX */ + sc->command_byte = -1; + sc->command_mask = 0; + sc->lock = FALSE; + sc->kbd.head = sc->kbd.tail = 0; + sc->aux.head = sc->aux.tail = 0; +#if KBDIO_DEBUG >= 2 + sc->kbd.call_count = 0; + sc->kbd.qcount = sc->kbd.max_qcount = 0; + sc->aux.call_count = 0; + sc->aux.qcount = sc->aux.max_qcount = 0; +#endif + } + sc->iot = tag; + sc->ioh0 = h0; + sc->ioh1 = h1; + return 0; +} + +/* open a keyboard controller */ +KBDC +atkbdc_open(int unit) +{ + if (unit <= 0) + unit = 0; + if (unit >= MAXKBDC) + return NULL; + if ((atkbdc_softc[unit]->port0 != NULL) + || (atkbdc_softc[unit]->ioh0 != 0)) /* XXX */ + return (KBDC)atkbdc_softc[unit]; + return NULL; +} + +/* + * I/O access arbitration in `kbdio' + * + * The `kbdio' module uses a simplistic convention to arbitrate + * I/O access to the controller/keyboard/mouse. The convention requires + * close cooperation of the calling device driver. + * + * The device drivers which utilize the `kbdio' module are assumed to + * have the following set of routines. + * a. An interrupt handler (the bottom half of the driver). + * b. Timeout routines which may briefly poll the keyboard controller. + * c. Routines outside interrupt context (the top half of the driver). + * They should follow the rules below: + * 1. The interrupt handler may assume that it always has full access + * to the controller/keyboard/mouse. + * 2. The other routines must issue `spltty()' if they wish to + * prevent the interrupt handler from accessing + * the controller/keyboard/mouse. + * 3. The timeout routines and the top half routines of the device driver + * arbitrate I/O access by observing the lock flag in `kbdio'. + * The flag is manipulated via `kbdc_lock()'; when one wants to + * perform I/O, call `kbdc_lock(kbdc, TRUE)' and proceed only if + * the call returns with TRUE. Otherwise the caller must back off. + * Call `kbdc_lock(kbdc, FALSE)' when necessary I/O operaion + * is finished. This mechanism does not prevent the interrupt + * handler from being invoked at any time and carrying out I/O. + * Therefore, `spltty()' must be strategically placed in the device + * driver code. Also note that the timeout routine may interrupt + * `kbdc_lock()' called by the top half of the driver, but this + * interruption is OK so long as the timeout routine observes + * rule 4 below. + * 4. The interrupt and timeout routines should not extend I/O operation + * across more than one interrupt or timeout; they must complete any + * necessary I/O operation within one invocation of the routine. + * This means that if the timeout routine acquires the lock flag, + * it must reset the flag to FALSE before it returns. + */ + +/* set/reset polling lock */ +int +kbdc_lock(KBDC p, int lock) +{ + int prevlock; + + prevlock = kbdcp(p)->lock; + kbdcp(p)->lock = lock; + + return (prevlock != lock); +} + +/* check if any data is waiting to be processed */ +int +kbdc_data_ready(KBDC p) +{ + return (availq(&kbdcp(p)->kbd) || availq(&kbdcp(p)->aux) + || (read_status(kbdcp(p)) & KBDS_ANY_BUFFER_FULL)); +} + +/* queuing functions */ + +static int +addq(kqueue *q, int c) +{ + if (nextq(q->tail) != q->head) { + q->q[q->tail] = c; + q->tail = nextq(q->tail); +#if KBDIO_DEBUG >= 2 + ++q->call_count; + ++q->qcount; + if (q->qcount > q->max_qcount) + q->max_qcount = q->qcount; +#endif + return TRUE; + } + return FALSE; +} + +static int +removeq(kqueue *q) +{ + int c; + + if (q->tail != q->head) { + c = q->q[q->head]; + q->head = nextq(q->head); +#if KBDIO_DEBUG >= 2 + --q->qcount; +#endif + return c; + } + return -1; +} + +/* + * device I/O routines + */ +static int +wait_while_controller_busy(struct atkbdc_softc *kbdc) +{ + /* CPU will stay inside the loop for 100msec at most */ + int retry = 5000; + int f; + + while ((f = read_status(kbdc)) & KBDS_INPUT_BUFFER_FULL) { + if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + addq(&kbdc->kbd, read_data(kbdc)); + } else if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + addq(&kbdc->aux, read_data(kbdc)); + } + DELAY(KBDC_DELAYTIME); + if (--retry < 0) + return FALSE; + } + return TRUE; +} + +/* + * wait for any data; whether it's from the controller, + * the keyboard, or the aux device. + */ +static int +wait_for_data(struct atkbdc_softc *kbdc) +{ + /* CPU will stay inside the loop for 200msec at most */ + int retry = 10000; + int f; + + while ((f = read_status(kbdc) & KBDS_ANY_BUFFER_FULL) == 0) { + DELAY(KBDC_DELAYTIME); + if (--retry < 0) + return 0; + } + DELAY(KBDD_DELAYTIME); + return f; +} + +/* wait for data from the keyboard */ +static int +wait_for_kbd_data(struct atkbdc_softc *kbdc) +{ + /* CPU will stay inside the loop for 200msec at most */ + int retry = 10000; + int f; + + while ((f = read_status(kbdc) & KBDS_BUFFER_FULL) + != KBDS_KBD_BUFFER_FULL) { + if (f == KBDS_AUX_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + addq(&kbdc->aux, read_data(kbdc)); + } + DELAY(KBDC_DELAYTIME); + if (--retry < 0) + return 0; + } + DELAY(KBDD_DELAYTIME); + return f; +} + +/* + * wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the keyboard. + * queue anything else. + */ +static int +wait_for_kbd_ack(struct atkbdc_softc *kbdc) +{ + /* CPU will stay inside the loop for 200msec at most */ + int retry = 10000; + int f; + int b; + + while (retry-- > 0) { + if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + b = read_data(kbdc); + if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) { + if ((b == KBD_ACK) || (b == KBD_RESEND) + || (b == KBD_RESET_FAIL)) + return b; + addq(&kbdc->kbd, b); + } else if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) { + addq(&kbdc->aux, b); + } + } + DELAY(KBDC_DELAYTIME); + } + return -1; +} + +/* wait for data from the aux device */ +static int +wait_for_aux_data(struct atkbdc_softc *kbdc) +{ + /* CPU will stay inside the loop for 200msec at most */ + int retry = 10000; + int f; + + while ((f = read_status(kbdc) & KBDS_BUFFER_FULL) + != KBDS_AUX_BUFFER_FULL) { + if (f == KBDS_KBD_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + addq(&kbdc->kbd, read_data(kbdc)); + } + DELAY(KBDC_DELAYTIME); + if (--retry < 0) + return 0; + } + DELAY(KBDD_DELAYTIME); + return f; +} + +/* + * wait for an ACK(FAh), RESEND(FEh), or RESET_FAIL(FCh) from the aux device. + * queue anything else. + */ +static int +wait_for_aux_ack(struct atkbdc_softc *kbdc) +{ + /* CPU will stay inside the loop for 200msec at most */ + int retry = 10000; + int f; + int b; + + while (retry-- > 0) { + if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + b = read_data(kbdc); + if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) { + if ((b == PSM_ACK) || (b == PSM_RESEND) + || (b == PSM_RESET_FAIL)) + return b; + addq(&kbdc->aux, b); + } else if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) { + addq(&kbdc->kbd, b); + } + } + DELAY(KBDC_DELAYTIME); + } + return -1; +} + +/* write a one byte command to the controller */ +int +write_controller_command(KBDC p, int c) +{ + if (!wait_while_controller_busy(kbdcp(p))) + return FALSE; + write_command(kbdcp(p), c); + return TRUE; +} + +/* write a one byte data to the controller */ +int +write_controller_data(KBDC p, int c) +{ + if (!wait_while_controller_busy(kbdcp(p))) + return FALSE; + write_data(kbdcp(p), c); + return TRUE; +} + +/* write a one byte keyboard command */ +int +write_kbd_command(KBDC p, int c) +{ + if (!wait_while_controller_busy(kbdcp(p))) + return FALSE; + write_data(kbdcp(p), c); + return TRUE; +} + +/* write a one byte auxiliary device command */ +int +write_aux_command(KBDC p, int c) +{ + if (!write_controller_command(p, KBDC_WRITE_TO_AUX)) + return FALSE; + return write_controller_data(p, c); +} + +/* send a command to the keyboard and wait for ACK */ +int +send_kbd_command(KBDC p, int c) +{ + int retry = KBD_MAXRETRY; + int res = -1; + + while (retry-- > 0) { + if (!write_kbd_command(p, c)) + continue; + res = wait_for_kbd_ack(kbdcp(p)); + if (res == KBD_ACK) + break; + } + return res; +} + +/* send a command to the auxiliary device and wait for ACK */ +int +send_aux_command(KBDC p, int c) +{ + int retry = KBD_MAXRETRY; + int res = -1; + + while (retry-- > 0) { + if (!write_aux_command(p, c)) + continue; + /* + * FIXME: XXX + * The aux device may have already sent one or two bytes of + * status data, when a command is received. It will immediately + * stop data transmission, thus, leaving an incomplete data + * packet in our buffer. We have to discard any unprocessed + * data in order to remove such packets. Well, we may remove + * unprocessed, but necessary data byte as well... + */ + emptyq(&kbdcp(p)->aux); + res = wait_for_aux_ack(kbdcp(p)); + if (res == PSM_ACK) + break; + } + return res; +} + +/* send a command and a data to the keyboard, wait for ACKs */ +int +send_kbd_command_and_data(KBDC p, int c, int d) +{ + int retry; + int res = -1; + + for (retry = KBD_MAXRETRY; retry > 0; --retry) { + if (!write_kbd_command(p, c)) + continue; + res = wait_for_kbd_ack(kbdcp(p)); + if (res == KBD_ACK) + break; + else if (res != KBD_RESEND) + return res; + } + if (retry <= 0) + return res; + + for (retry = KBD_MAXRETRY, res = -1; retry > 0; --retry) { + if (!write_kbd_command(p, d)) + continue; + res = wait_for_kbd_ack(kbdcp(p)); + if (res != KBD_RESEND) + break; + } + return res; +} + +/* send a command and a data to the auxiliary device, wait for ACKs */ +int +send_aux_command_and_data(KBDC p, int c, int d) +{ + int retry; + int res = -1; + + for (retry = KBD_MAXRETRY; retry > 0; --retry) { + if (!write_aux_command(p, c)) + continue; + emptyq(&kbdcp(p)->aux); + res = wait_for_aux_ack(kbdcp(p)); + if (res == PSM_ACK) + break; + else if (res != PSM_RESEND) + return res; + } + if (retry <= 0) + return res; + + for (retry = KBD_MAXRETRY, res = -1; retry > 0; --retry) { + if (!write_aux_command(p, d)) + continue; + res = wait_for_aux_ack(kbdcp(p)); + if (res != PSM_RESEND) + break; + } + return res; +} + +/* + * read one byte from any source; whether from the controller, + * the keyboard, or the aux device + */ +int +read_controller_data(KBDC p) +{ + if (availq(&kbdcp(p)->kbd)) + return removeq(&kbdcp(p)->kbd); + if (availq(&kbdcp(p)->aux)) + return removeq(&kbdcp(p)->aux); + if (!wait_for_data(kbdcp(p))) + return -1; /* timeout */ + return read_data(kbdcp(p)); +} + +#if KBDIO_DEBUG >= 2 +static int call = 0; +#endif + +/* read one byte from the keyboard */ +int +read_kbd_data(KBDC p) +{ +#if KBDIO_DEBUG >= 2 + if (++call > 2000) { + call = 0; + log(LOG_DEBUG, "kbdc: kbd q: %d calls, max %d chars, " + "aux q: %d calls, max %d chars\n", + kbdcp(p)->kbd.call_count, kbdcp(p)->kbd.max_qcount, + kbdcp(p)->aux.call_count, kbdcp(p)->aux.max_qcount); + } +#endif + + if (availq(&kbdcp(p)->kbd)) + return removeq(&kbdcp(p)->kbd); + if (!wait_for_kbd_data(kbdcp(p))) + return -1; /* timeout */ + return read_data(kbdcp(p)); +} + +/* read one byte from the keyboard, but return immediately if + * no data is waiting + */ +int +read_kbd_data_no_wait(KBDC p) +{ + int f; + +#if KBDIO_DEBUG >= 2 + if (++call > 2000) { + call = 0; + log(LOG_DEBUG, "kbdc: kbd q: %d calls, max %d chars, " + "aux q: %d calls, max %d chars\n", + kbdcp(p)->kbd.call_count, kbdcp(p)->kbd.max_qcount, + kbdcp(p)->aux.call_count, kbdcp(p)->aux.max_qcount); + } +#endif + + if (availq(&kbdcp(p)->kbd)) + return removeq(&kbdcp(p)->kbd); + f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL; + if (f == KBDS_AUX_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + addq(&kbdcp(p)->aux, read_data(kbdcp(p))); + f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL; + } + if (f == KBDS_KBD_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + return read_data(kbdcp(p)); + } + return -1; /* no data */ +} + +/* read one byte from the aux device */ +int +read_aux_data(KBDC p) +{ + if (availq(&kbdcp(p)->aux)) + return removeq(&kbdcp(p)->aux); + if (!wait_for_aux_data(kbdcp(p))) + return -1; /* timeout */ + return read_data(kbdcp(p)); +} + +/* read one byte from the aux device, but return immediately if + * no data is waiting + */ +int +read_aux_data_no_wait(KBDC p) +{ + int f; + + if (availq(&kbdcp(p)->aux)) + return removeq(&kbdcp(p)->aux); + f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL; + if (f == KBDS_KBD_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + addq(&kbdcp(p)->kbd, read_data(kbdcp(p))); + f = read_status(kbdcp(p)) & KBDS_BUFFER_FULL; + } + if (f == KBDS_AUX_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + return read_data(kbdcp(p)); + } + return -1; /* no data */ +} + +/* discard data from the keyboard */ +void +empty_kbd_buffer(KBDC p, int wait) +{ + int t; + int b; + int f; +#if KBDIO_DEBUG >= 2 + int c1 = 0; + int c2 = 0; +#endif + int delta = 2; + + for (t = wait; t > 0; ) { + if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + b = read_data(kbdcp(p)); + if ((f & KBDS_BUFFER_FULL) == KBDS_AUX_BUFFER_FULL) { + addq(&kbdcp(p)->aux, b); +#if KBDIO_DEBUG >= 2 + ++c2; + } else { + ++c1; +#endif + } + t = wait; + } else { + t -= delta; + } + DELAY(delta*1000); + } +#if KBDIO_DEBUG >= 2 + if ((c1 > 0) || (c2 > 0)) + log(LOG_DEBUG, "kbdc: %d:%d char read (empty_kbd_buffer)\n", c1, c2); +#endif + + emptyq(&kbdcp(p)->kbd); +} + +/* discard data from the aux device */ +void +empty_aux_buffer(KBDC p, int wait) +{ + int t; + int b; + int f; +#if KBDIO_DEBUG >= 2 + int c1 = 0; + int c2 = 0; +#endif + int delta = 2; + + for (t = wait; t > 0; ) { + if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + b = read_data(kbdcp(p)); + if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) { + addq(&kbdcp(p)->kbd, b); +#if KBDIO_DEBUG >= 2 + ++c1; + } else { + ++c2; +#endif + } + t = wait; + } else { + t -= delta; + } + DELAY(delta*1000); + } +#if KBDIO_DEBUG >= 2 + if ((c1 > 0) || (c2 > 0)) + log(LOG_DEBUG, "kbdc: %d:%d char read (empty_aux_buffer)\n", c1, c2); +#endif + + emptyq(&kbdcp(p)->aux); +} + +/* discard any data from the keyboard or the aux device */ +void +empty_both_buffers(KBDC p, int wait) +{ + int t; + int f; +#if KBDIO_DEBUG >= 2 + int c1 = 0; + int c2 = 0; +#endif + int delta = 2; + + for (t = wait; t > 0; ) { + if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) { + DELAY(KBDD_DELAYTIME); + (void)read_data(kbdcp(p)); +#if KBDIO_DEBUG >= 2 + if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) + ++c1; + else + ++c2; +#endif + t = wait; + } else { + t -= delta; + } + DELAY(delta*1000); + } +#if KBDIO_DEBUG >= 2 + if ((c1 > 0) || (c2 > 0)) + log(LOG_DEBUG, "kbdc: %d:%d char read (empty_both_buffers)\n", c1, c2); +#endif + + emptyq(&kbdcp(p)->kbd); + emptyq(&kbdcp(p)->aux); +} + +/* keyboard and mouse device control */ + +/* NOTE: enable the keyboard port but disable the keyboard + * interrupt before calling "reset_kbd()". + */ +int +reset_kbd(KBDC p) +{ + int retry = KBD_MAXRETRY; + int again = KBD_MAXWAIT; + int c = KBD_RESEND; /* keep the compiler happy */ + + while (retry-- > 0) { + empty_both_buffers(p, 10); + if (!write_kbd_command(p, KBDC_RESET_KBD)) + continue; + emptyq(&kbdcp(p)->kbd); + c = read_controller_data(p); + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: RESET_KBD return code:%04x\n", c); + if (c == KBD_ACK) /* keyboard has agreed to reset itself... */ + break; + } + if (retry < 0) + return FALSE; + + while (again-- > 0) { + /* wait awhile, well, in fact we must wait quite loooooooooooong */ + DELAY(KBD_RESETDELAY*1000); + c = read_controller_data(p); /* RESET_DONE/RESET_FAIL */ + if (c != -1) /* wait again if the controller is not ready */ + break; + } + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: RESET_KBD status:%04x\n", c); + if (c != KBD_RESET_DONE) + return FALSE; + return TRUE; +} + +/* NOTE: enable the aux port but disable the aux interrupt + * before calling `reset_aux_dev()'. + */ +int +reset_aux_dev(KBDC p) +{ + int retry = KBD_MAXRETRY; + int again = KBD_MAXWAIT; + int c = PSM_RESEND; /* keep the compiler happy */ + + while (retry-- > 0) { + empty_both_buffers(p, 10); + if (!write_aux_command(p, PSMC_RESET_DEV)) + continue; + emptyq(&kbdcp(p)->aux); + /* NOTE: Compaq Armada laptops require extra delay here. XXX */ + for (again = KBD_MAXWAIT; again > 0; --again) { + DELAY(KBD_RESETDELAY*1000); + c = read_aux_data_no_wait(p); + if (c != -1) + break; + } + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: RESET_AUX return code:%04x\n", c); + if (c == PSM_ACK) /* aux dev is about to reset... */ + break; + } + if (retry < 0) + return FALSE; + + for (again = KBD_MAXWAIT; again > 0; --again) { + /* wait awhile, well, quite looooooooooooong */ + DELAY(KBD_RESETDELAY*1000); + c = read_aux_data_no_wait(p); /* RESET_DONE/RESET_FAIL */ + if (c != -1) /* wait again if the controller is not ready */ + break; + } + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: RESET_AUX status:%04x\n", c); + if (c != PSM_RESET_DONE) /* reset status */ + return FALSE; + + c = read_aux_data(p); /* device ID */ + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: RESET_AUX ID:%04x\n", c); + /* NOTE: we could check the device ID now, but leave it later... */ + return TRUE; +} + +/* controller diagnostics and setup */ + +int +test_controller(KBDC p) +{ + int retry = KBD_MAXRETRY; + int again = KBD_MAXWAIT; + int c = KBD_DIAG_FAIL; + + while (retry-- > 0) { + empty_both_buffers(p, 10); + if (write_controller_command(p, KBDC_DIAGNOSE)) + break; + } + if (retry < 0) + return FALSE; + + emptyq(&kbdcp(p)->kbd); + while (again-- > 0) { + /* wait awhile */ + DELAY(KBD_RESETDELAY*1000); + c = read_controller_data(p); /* DIAG_DONE/DIAG_FAIL */ + if (c != -1) /* wait again if the controller is not ready */ + break; + } + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: DIAGNOSE status:%04x\n", c); + return (c == KBD_DIAG_DONE); +} + +int +test_kbd_port(KBDC p) +{ + int retry = KBD_MAXRETRY; + int again = KBD_MAXWAIT; + int c = -1; + + while (retry-- > 0) { + empty_both_buffers(p, 10); + if (write_controller_command(p, KBDC_TEST_KBD_PORT)) + break; + } + if (retry < 0) + return FALSE; + + emptyq(&kbdcp(p)->kbd); + while (again-- > 0) { + c = read_controller_data(p); + if (c != -1) /* try again if the controller is not ready */ + break; + } + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: TEST_KBD_PORT status:%04x\n", c); + return c; +} + +int +test_aux_port(KBDC p) +{ + int retry = KBD_MAXRETRY; + int again = KBD_MAXWAIT; + int c = -1; + + while (retry-- > 0) { + empty_both_buffers(p, 10); + if (write_controller_command(p, KBDC_TEST_AUX_PORT)) + break; + } + if (retry < 0) + return FALSE; + + emptyq(&kbdcp(p)->kbd); + while (again-- > 0) { + c = read_controller_data(p); + if (c != -1) /* try again if the controller is not ready */ + break; + } + if (verbose || bootverbose) + log(LOG_DEBUG, "kbdc: TEST_AUX_PORT status:%04x\n", c); + return c; +} + +int +kbdc_get_device_mask(KBDC p) +{ + return kbdcp(p)->command_mask; +} + +void +kbdc_set_device_mask(KBDC p, int mask) +{ + kbdcp(p)->command_mask = + mask & (KBD_KBD_CONTROL_BITS | KBD_AUX_CONTROL_BITS); +} + +int +get_controller_command_byte(KBDC p) +{ + if (kbdcp(p)->command_byte != -1) + return kbdcp(p)->command_byte; + if (!write_controller_command(p, KBDC_GET_COMMAND_BYTE)) + return -1; + emptyq(&kbdcp(p)->kbd); + kbdcp(p)->command_byte = read_controller_data(p); + return kbdcp(p)->command_byte; +} + +int +set_controller_command_byte(KBDC p, int mask, int command) +{ + if (get_controller_command_byte(p) == -1) + return FALSE; + + command = (kbdcp(p)->command_byte & ~mask) | (command & mask); + if (command & KBD_DISABLE_KBD_PORT) { + if (!write_controller_command(p, KBDC_DISABLE_KBD_PORT)) + return FALSE; + } + if (!write_controller_command(p, KBDC_SET_COMMAND_BYTE)) + return FALSE; + if (!write_controller_data(p, command)) + return FALSE; + kbdcp(p)->command_byte = command; + + if (verbose) + log(LOG_DEBUG, "kbdc: new command byte:%04x (set_controller...)\n", + command); + + return TRUE; +} |
