diff options
Diffstat (limited to 'common/ioexpander.c')
| -rw-r--r-- | common/ioexpander.c | 338 |
1 files changed, 0 insertions, 338 deletions
diff --git a/common/ioexpander.c b/common/ioexpander.c deleted file mode 100644 index ccf3cc7c4a..0000000000 --- a/common/ioexpander.c +++ /dev/null @@ -1,338 +0,0 @@ -/* 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 "system.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(enum ioex_signal signal, int v) -{ - const int i = signal - IOEX_SIGNAL_START; - - ASSERT(signal_is_ioex(signal)); - - 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 signal_is_ioex(int signal) -{ - return ((signal >= IOEX_SIGNAL_START) && (signal < IOEX_SIGNAL_END)); -} - -static const struct ioex_info *ioex_get_signal_info(enum ioex_signal signal) -{ - const struct ioex_info *g; - - ASSERT(signal_is_ioex(signal)); - - g = ioex_list + signal - IOEX_SIGNAL_START; - - if (ioex_config[g->ioex].flags & IOEX_FLAGS_DISABLED) { - CPRINTS("ioex %s disabled", g->name); - return NULL; - } - - return g; -} - -static int ioex_is_valid_interrupt_signal(enum ioex_signal signal) -{ - const struct ioexpander_drv *drv; - const struct ioex_info *g = ioex_get_signal_info(signal); - - if (g == NULL) - return EC_ERROR_BUSY; - - /* Fail if no interrupt handler */ - if (signal - IOEX_SIGNAL_START >= ioex_ih_count) - return EC_ERROR_PARAM1; - - drv = ioex_config[g->ioex].drv; - /* - * Not every IOEX chip can support interrupt, check it before enabling - * the interrupt function - */ - if (drv->enable_interrupt == NULL) { - CPRINTS("IOEX chip port %d doesn't support INT", g->ioex); - return EC_ERROR_UNIMPLEMENTED; - } - - return EC_SUCCESS; -} - -int ioex_enable_interrupt(enum ioex_signal signal) -{ - int rv; - const struct ioex_info *g = ioex_get_signal_info(signal); - const struct ioexpander_drv *drv; - - rv = ioex_is_valid_interrupt_signal(signal); - if (rv != EC_SUCCESS) - return rv; - - drv = ioex_config[g->ioex].drv; - return drv->enable_interrupt(g->ioex, g->port, g->mask, 1); -} - -int ioex_disable_interrupt(enum ioex_signal signal) -{ - int rv; - const struct ioexpander_drv *drv; - const struct ioex_info *g = ioex_get_signal_info(signal); - - rv = ioex_is_valid_interrupt_signal(signal); - if (rv != EC_SUCCESS) - return rv; - - drv = ioex_config[g->ioex].drv; - return drv->enable_interrupt(g->ioex, g->port, g->mask, 0); -} - -int ioex_get_flags(enum ioex_signal signal, int *flags) -{ - const struct ioex_info *g = ioex_get_signal_info(signal); - - if (g == NULL) - return EC_ERROR_BUSY; - - 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_get_signal_info(signal); - - if (g == NULL) - return EC_ERROR_BUSY; - - 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_get_signal_info(signal); - - if (g == NULL) - return EC_ERROR_BUSY; - - 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_get_signal_info(signal); - - if (g == NULL) - return EC_ERROR_BUSY; - - return ioex_config[g->ioex].drv->set_level(g->ioex, g->port, - g->mask, value); -} - -#ifdef CONFIG_IO_EXPANDER_SUPPORT_GET_PORT -int ioex_get_port(int ioex, int port, int *val) -{ - if (ioex_config[ioex].drv->get_port == NULL) - return EC_ERROR_UNIMPLEMENTED; - - return ioex_config[ioex].drv->get_port(ioex, port, val); -} -#endif - -int ioex_init(int ioex) -{ - const struct ioex_info *g = ioex_list; - const struct ioexpander_drv *drv = ioex_config[ioex].drv; - int rv; - int i; - - if (ioex_config[ioex].flags & IOEX_FLAGS_DISABLED) - return EC_ERROR_BUSY; - - if (drv->init != NULL) { - rv = drv->init(ioex); - if (rv != EC_SUCCESS) - return rv; - } - - /* - * Set all IO expander GPIOs to default flags according to the setting - * in gpio.inc - */ - for (i = 0; i < IOEX_COUNT; i++, g++) { - int flags = g->flags; - - if (g->ioex == ioex && g->mask && !(flags & GPIO_DEFAULT)) { - /* Late-sysJump should not set the output levels */ - if (system_jumped_late()) - flags &= ~(GPIO_LOW | GPIO_HIGH); - - drv->set_flags_by_mask(g->ioex, g->port, - g->mask, flags); - } - } - - return EC_SUCCESS; -} - -static void ioex_init_default(void) -{ - int i; - - for (i = 0; i < CONFIG_IO_EXPANDER_PORT_COUNT; i++) - ioex_init(i); -} -DECLARE_HOOK(HOOK_INIT, ioex_init_default, HOOK_PRIO_INIT_I2C + 1); - -const char *ioex_get_name(enum ioex_signal signal) -{ - const struct ioex_info *g = ioex_list + signal - IOEX_SIGNAL_START; - - return g->name; -} - -static void print_ioex_info(enum ioex_signal signal) -{ - int changed, v, val; - int flags = 0; - const struct ioex_info *g = ioex_list + signal - IOEX_SIGNAL_START; - - if (ioex_config[g->ioex].flags & IOEX_FLAGS_DISABLED) { - ccprintf(" DISABLED %s\n", ioex_get_name(signal)); - return; - } - - - v = ioex_get_level(signal, &val); - if (v) { - ccprintf("Fail to get %s level\n", ioex_get_name(signal)); - return; - } - v = ioex_get_flags(signal, &flags); - if (v) { - ccprintf("Fail to get %s flags\n", ioex_get_name(signal)); - return; - } - - changed = last_val_changed(signal, 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(signal)); - - /* Flush console to avoid truncating output */ - cflush(); -} - -static int ioex_get_default_flags(enum ioex_signal signal) -{ - const struct ioex_info *g = ioex_get_signal_info(signal); - - if (g == NULL) - return 0; - - return g->flags; -} - -/* IO expander commands */ -static enum ioex_signal find_ioex_by_name(const char *name) -{ - enum ioex_signal signal; - - if (!name) - return IOEX_SIGNAL_END; - - for (signal = IOEX_SIGNAL_START; signal < IOEX_SIGNAL_END; signal++) { - if (!strcasecmp(name, ioex_get_name(signal))) - return signal; - } - - return IOEX_SIGNAL_END; -} - -static enum ec_error_list ioex_set(const char *name, int value) -{ - enum ioex_signal signal = find_ioex_by_name(name); - - if (!signal_is_ioex(signal)) - 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) -{ - enum ioex_signal signal; - - /* If a signal is specified, print only that one */ - if (argc == 2) { - signal = find_ioex_by_name(argv[1]); - if (!signal_is_ioex(signal)) - return EC_ERROR_PARAM1; - print_ioex_info(signal); - - return EC_SUCCESS; - } - - /* Otherwise print them all */ - for (signal = IOEX_SIGNAL_START; signal < IOEX_SIGNAL_END; signal++) - print_ioex_info(signal); - - return EC_SUCCESS; -} -DECLARE_SAFE_CONSOLE_COMMAND(ioexget, command_ioex_get, - "[name]", - "Read level of IO expander pin(s)"); - |