NetBSD-5.0.2/sys/arch/hpcarm/dev/ipaq_atmelgpio.c
/* $NetBSD: ipaq_atmelgpio.c,v 1.14 2008/04/28 20:23:21 martin 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.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ipaq_atmelgpio.c,v 1.14 2008/04/28 20:23:21 martin Exp $");
#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 <arm/sa11x0/sa11x0_gpioreg.h>
#include <arm/sa11x0/sa11x0_comreg.h>
#include <arm/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 *,
const int *, void *);
static void atmelgpio_init(struct atmelgpio_softc *);
static void rxtx_data(struct atmelgpio_softc *, int, int,
uint8_t *, struct atmel_rx *);
CFATTACH_DECL(atmelgpio, sizeof(struct atmelgpio_softc),
atmelgpio_match, atmelgpio_attach, NULL, NULL);
static int
atmelgpio_match(struct device *parent, struct cfdata *cf, void *aux)
{
return (1);
}
static void
atmelgpio_attach(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);
rxbuf.idx = 0;
rxbuf.len = 0;
#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
rxtx_data(sc, READ_IIC, 0, NULL, &rxbuf);
/*
* Attach each devices
*/
config_search_ia(atmelgpio_search, self, "atmelgpioif", NULL);
}
static int
atmelgpio_search(struct device *parent, struct cfdata *cf, const int *ldesc,
void *aux)
{
if (config_match(parent, cf, NULL) > 0)
config_attach(parent, cf, NULL, atmelgpio_print);
return 0;
}
static int
atmelgpio_print(void *aux, const char *name)
{
return (UNCONF);
}
static void
atmelgpio_init(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(struct atmelgpio_softc *sc, int id, int size, uint8_t *buf,
struct atmel_rx *rxbuf)
{
int i, checksum, length, rx_data;
uint8_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] = (uint8_t)FRAME_SOF;
data[1] = (uint8_t)((id << 4) | size);
checksum = data[1];
i = 2;
while (size--) {
data[i++] = *buf;
checksum += (uint8_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;
}
}
}