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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* IO Expander Controller Common Code */
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "ioexpander.h"
#include "util.h"
#define CPRINTF(format, args...) cprintf(CC_GPIO, format, ## args)
#define CPRINTS(format, args...) cprints(CC_GPIO, format, ## args)
static uint8_t last_val[(IOEX_COUNT + 7) / 8];
static int last_val_changed(int i, int v)
{
if (v && !(last_val[i / 8] & (BIT(i % 8)))) {
last_val[i / 8] |= BIT(i % 8);
return 1;
} else if (!v && last_val[i / 8] & (BIT(i % 8))) {
last_val[i / 8] &= ~(BIT(i % 8));
return 1;
} else {
return 0;
}
}
int ioex_get_flags_by_mask(int ioex, int port, int mask, int *flags)
{
return ioex_config[ioex].drv->get_flags_by_mask(ioex, port, mask,
flags);
}
int ioex_set_flags_by_mask(int ioex, int port, int mask, int flags)
{
return ioex_config[ioex].drv->set_flags_by_mask(ioex, port, mask,
flags);
}
int ioex_get_flags(enum ioex_signal signal, int *flags)
{
const struct ioex_info *g = ioex_list + signal;
return ioex_config[g->ioex].drv->get_flags_by_mask(g->ioex,
g->port, g->mask, flags);
}
int ioex_set_flags(enum ioex_signal signal, int flags)
{
const struct ioex_info *g = ioex_list + signal;
return ioex_config[g->ioex].drv->set_flags_by_mask(g->ioex,
g->port, g->mask, flags);
}
int ioex_get_level(enum ioex_signal signal, int *val)
{
const struct ioex_info *g = ioex_list + signal;
return ioex_config[g->ioex].drv->get_level(g->ioex, g->port,
g->mask, val);
}
int ioex_set_level(enum ioex_signal signal, int value)
{
const struct ioex_info *g = ioex_list + signal;
return ioex_config[g->ioex].drv->set_level(g->ioex, g->port,
g->mask, value);
}
int ioex_init(int ioex)
{
const struct ioexpander_drv *drv = ioex_config[ioex].drv;
if (drv->init == NULL)
return EC_SUCCESS;
return drv->init(ioex);
}
static void ioex_init_default(void)
{
const struct ioex_info *g = ioex_list;
int i;
for (i = 0; i < CONFIG_IO_EXPANDER_PORT_COUNT; i++)
ioex_init(i);
/*
* Set all IO expander GPIOs to default flags according to the setting
* in gpio.inc
*/
for (i = 0; i < IOEX_COUNT; i++, g++) {
if (g->mask && !(g->flags & GPIO_DEFAULT)) {
ioex_set_flags_by_mask(g->ioex, g->port,
g->mask, g->flags);
}
}
}
DECLARE_HOOK(HOOK_INIT, ioex_init_default, HOOK_PRIO_INIT_I2C + 1);
const char *ioex_get_name(enum ioex_signal signal)
{
return ioex_list[signal].name;
}
static void print_ioex_info(int io)
{
int changed, v, val;
int flags = 0;
v = ioex_get_level(io, &val);
if (v) {
ccprintf("Fail to get %s level\n", ioex_get_name(io));
return;
}
v = ioex_get_flags(io, &flags);
if (v) {
ccprintf("Fail to get %s flags\n", ioex_get_name(io));
return;
}
changed = last_val_changed(io, val);
ccprintf(" %d%c %s%s%s%s%s%s\n", val,
(changed ? '*' : ' '),
(flags & GPIO_INPUT ? "I " : ""),
(flags & GPIO_OUTPUT ? "O " : ""),
(flags & GPIO_LOW ? "L " : ""),
(flags & GPIO_HIGH ? "H " : ""),
(flags & GPIO_OPEN_DRAIN ? "ODR " : ""),
ioex_get_name(io));
/* Flush console to avoid truncating output */
cflush();
}
int ioex_get_default_flags(enum ioex_signal signal)
{
return ioex_list[signal].flags;
}
/* IO expander commands */
static enum ioex_signal find_ioex_by_name(const char *name)
{
int i;
if (!name)
return IOEX_COUNT;
for (i = 0; i < IOEX_COUNT; i++) {
if (!strcasecmp(name, ioex_get_name(i)))
return i;
}
return IOEX_COUNT;
}
static enum ec_error_list ioex_set(const char *name, int value)
{
enum ioex_signal signal = find_ioex_by_name(name);
if (signal == IOEX_COUNT)
return EC_ERROR_INVAL;
if (!(ioex_get_default_flags(signal) & GPIO_OUTPUT))
return EC_ERROR_INVAL;
return ioex_set_level(signal, value);
}
static int command_ioex_set(int argc, char **argv)
{
char *e;
int v;
if (argc < 3)
return EC_ERROR_PARAM_COUNT;
v = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
if (ioex_set(argv[1], v) != EC_SUCCESS)
return EC_ERROR_PARAM1;
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(ioexset, command_ioex_set,
"name <0 | 1>",
"Set level of a IO expander IO");
static int command_ioex_get(int argc, char **argv)
{
int i;
/* If a signal is specified, print only that one */
if (argc == 2) {
i = find_ioex_by_name(argv[1]);
if (i == IOEX_COUNT)
return EC_ERROR_PARAM1;
print_ioex_info(i);
return EC_SUCCESS;
}
/* Otherwise print them all */
for (i = 0; i < IOEX_COUNT; i++)
print_ioex_info(i);
return EC_SUCCESS;
}
DECLARE_SAFE_CONSOLE_COMMAND(ioexget, command_ioex_get,
"[name]",
"Read level of IO expander pin(s)");
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