243 lines
6.9 KiB
C
243 lines
6.9 KiB
C
/* $NetBSD: ipaq_atmelgpio.c,v 1.2 2001/08/02 18:51:01 ichiro Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2001 The NetBSD Foundation, Inc. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Ichiro FUKUHARA (ichiro@ichiro.org).
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
/*
|
|
* iPAQ uses Atmel microcontroller to service a few of peripheral devices.
|
|
* This controller connect to UART1 of SA11x0.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/types.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/file.h>
|
|
#include <sys/device.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/kthread.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <hpcarm/dev/ipaq_saipvar.h>
|
|
#include <hpcarm/dev/ipaq_gpioreg.h>
|
|
#include <hpcarm/dev/ipaq_atmel.h>
|
|
#include <hpcarm/dev/ipaq_atmelvar.h>
|
|
#include <hpcarm/sa11x0/sa11x0_gpioreg.h>
|
|
#include <hpcarm/sa11x0/sa11x0_comreg.h>
|
|
#include <hpcarm/sa11x0/sa11x0_reg.h>
|
|
|
|
#ifdef ATMEL_DEBUG
|
|
#define DPRINTF(x) printf x
|
|
#else
|
|
#define DPRINTF(x)
|
|
#endif
|
|
|
|
static int atmelgpio_match(struct device *, struct cfdata *, void *);
|
|
static void atmelgpio_attach(struct device *, struct device *, void *);
|
|
static int atmelgpio_print(void *, const char *);
|
|
static int atmelgpio_search(struct device *, struct cfdata *, void *);
|
|
static void atmelgpio_init(struct atmelgpio_softc *);
|
|
|
|
static void rxtx_data(struct atmelgpio_softc *, int, int,
|
|
u_int8_t *, struct atmel_rx *);
|
|
|
|
struct cfattach atmelgpio_ca = {
|
|
sizeof(struct atmelgpio_softc), atmelgpio_match, atmelgpio_attach
|
|
};
|
|
|
|
static int
|
|
atmelgpio_match(parent, cf, aux)
|
|
struct device *parent;
|
|
struct cfdata *cf;
|
|
void *aux;
|
|
{
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
atmelgpio_attach(parent, self, aux)
|
|
struct device *parent;
|
|
struct device *self;
|
|
void *aux;
|
|
{
|
|
struct atmelgpio_softc *sc = (struct atmelgpio_softc *)self;
|
|
struct ipaq_softc *psc = (struct ipaq_softc *)parent;
|
|
|
|
struct atmel_rx *rxbuf;
|
|
|
|
printf("\n");
|
|
printf("%s: Atmel microcontroller GPIO\n", sc->sc_dev.dv_xname);
|
|
|
|
sc->sc_iot = psc->sc_iot;
|
|
sc->sc_ioh = psc->sc_ioh;
|
|
sc->sc_parent = (struct ipaq_softc *)parent;
|
|
|
|
if (bus_space_map(sc->sc_iot, SACOM1_BASE, SACOM_NPORTS, 0,
|
|
&sc->sc_ioh)) {
|
|
printf("%s: unable to map of UART1 registers\n", sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
atmelgpio_init(sc);
|
|
|
|
#if 1 /* this is sample */
|
|
rxtx_data(sc, STATUS_BATTERY, 0, NULL, rxbuf);
|
|
|
|
printf("ac_status = %x\n", rxbuf->data[0]);
|
|
printf("Battery kind = %x\n", rxbuf->data[1]);
|
|
printf("Voltage = %d mV\n",
|
|
1000 * (rxbuf->data[3] << 8 | rxbuf->data[2]) /228);
|
|
printf("Battery Status = %x\n", rxbuf->data[4]);
|
|
printf("Battery percentage = %d\n",
|
|
425 * (rxbuf->data[3] << 8 | rxbuf->data[2]) /1000 - 298);
|
|
#endif
|
|
|
|
/*
|
|
* Attach each devices
|
|
*/
|
|
|
|
config_search(atmelgpio_search, self, NULL);
|
|
}
|
|
|
|
static int
|
|
atmelgpio_search(parent, cf, aux)
|
|
struct device *parent;
|
|
struct cfdata *cf;
|
|
void *aux;
|
|
{
|
|
if ((*cf->cf_attach->ca_match)(parent, cf, NULL) > 0)
|
|
config_attach(parent, cf, NULL, atmelgpio_print);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
atmelgpio_print(aux, name)
|
|
void *aux;
|
|
const char *name;
|
|
{
|
|
return (UNCONF);
|
|
}
|
|
|
|
static void
|
|
atmelgpio_init(sc)
|
|
struct atmelgpio_softc *sc;
|
|
{
|
|
/* 8 bits no parity 1 stop bit */
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR0, CR0_DSS);
|
|
|
|
/* Set baud rate 115k */
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0);
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200));
|
|
|
|
/* RX/TX enable, RX/TX FIFO interrupt enable */
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3,
|
|
(CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE));
|
|
}
|
|
|
|
static void
|
|
rxtx_data(sc, id, size, buf, rxbuf)
|
|
struct atmelgpio_softc *sc;
|
|
int id, size;
|
|
u_int8_t *buf;
|
|
struct atmel_rx *rxbuf;
|
|
{
|
|
int i, checksum, length, rx_data;
|
|
u_int8_t data[MAX_SENDSIZE];
|
|
|
|
length = size + FRAME_OVERHEAD_SIZE;
|
|
|
|
while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS))
|
|
;
|
|
|
|
data[0] = (u_int8_t)FRAME_SOF;
|
|
data[1] = (u_int8_t)((id << 4) | size);
|
|
checksum = data[1];
|
|
i = 2;
|
|
while (size--) {
|
|
data[i++] = *buf;
|
|
checksum += (u_int8_t)(*buf++);
|
|
}
|
|
data[length-1] = checksum;
|
|
|
|
while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF))
|
|
;
|
|
i = 0;
|
|
while (i < length)
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]);
|
|
|
|
delay(10000);
|
|
#if 0
|
|
while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) &
|
|
(SR0_RID | SR0_RFS)))
|
|
#endif
|
|
rxbuf->state = STATE_SOF;
|
|
while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) {
|
|
|
|
rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR);
|
|
DPRINTF(("DATA = %x\n", rx_data));
|
|
|
|
switch (rxbuf->state) {
|
|
case STATE_SOF:
|
|
if (rx_data == FRAME_SOF)
|
|
rxbuf->state = STATE_ID;
|
|
break;
|
|
case STATE_ID:
|
|
rxbuf->id = (rx_data & 0xf0) >> 4;
|
|
rxbuf->len = rx_data & 0x0f;
|
|
rxbuf->idx = 0;
|
|
rxbuf->checksum = rx_data;
|
|
rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF;
|
|
break;
|
|
case STATE_DATA:
|
|
rxbuf->checksum += rx_data;
|
|
rxbuf->data[rxbuf->idx] = rx_data;
|
|
if (++rxbuf->idx == rxbuf->len)
|
|
rxbuf->state = STATE_EOF;
|
|
break;
|
|
case STATE_EOF:
|
|
rxbuf->state = STATE_SOF;
|
|
if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum)
|
|
DPRINTF(("frame EOF\n"));
|
|
else
|
|
DPRINTF(("BadFrame\n"));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|