130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
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/* Copyright 2017 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Device event commands for Chrome EC */
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#include "atomic.h"
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#include "common.h"
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#include "console.h"
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#include "host_command.h"
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#include "lpc.h"
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#include "mkbp_event.h"
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#include "util.h"
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/* Console output macros */
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#define CPUTS(outstr) cputs(CC_EVENTS, outstr)
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#define CPRINTS(format, args...) cprints(CC_EVENTS, format, ## args)
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static uint32_t device_current_events;
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static uint32_t device_enabled_events;
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uint32_t device_get_current_events(void)
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{
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return device_current_events;
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}
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static uint32_t device_get_and_clear_events(void)
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{
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return atomic_read_clear(&device_current_events);
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}
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static uint32_t device_get_enabled_events(void)
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{
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return device_enabled_events;
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}
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void device_set_events(uint32_t mask)
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{
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/* Ignore events that are not enabled */
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mask &= device_enabled_events;
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if ((device_current_events & mask) != mask)
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CPRINTS("device event set 0x%08x", mask);
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atomic_or(&device_current_events, mask);
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/* Signal host that a device event is pending */
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host_set_single_event(EC_HOST_EVENT_DEVICE);
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}
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void device_clear_events(uint32_t mask)
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{
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/* Only print if something's about to change */
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if (device_current_events & mask)
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CPRINTS("device event clear 0x%08x", mask);
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atomic_clear(&device_current_events, mask);
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}
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static void device_set_enabled_events(uint32_t mask)
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{
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if ((device_enabled_events & mask) != mask)
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CPRINTS("device enabled events set 0x%08x", mask);
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device_enabled_events = mask;
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}
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/*****************************************************************************/
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/* Console commands */
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#ifdef CONFIG_CMD_DEVICE_EVENT
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static int command_device_event(int argc, char **argv)
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{
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/* Handle sub-commands */
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if (argc == 3) {
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char *e;
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int i = strtoi(argv[2], &e, 0);
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if (*e)
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return EC_ERROR_PARAM2;
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else if (!strcasecmp(argv[1], "set"))
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device_set_events(i);
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else if (!strcasecmp(argv[1], "clear"))
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device_clear_events(i);
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else if (!strcasecmp(argv[1], "enable"))
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device_set_enabled_events(i);
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else
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return EC_ERROR_PARAM1;
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}
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ccprintf("Enabled Events: 0x%08x\n", device_get_enabled_events());
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ccprintf("Current Events: 0x%08x\n", device_get_current_events());
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(deviceevent, command_device_event,
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"[set | clear | enable] [mask]",
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"Print / set device event state");
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#endif
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/*****************************************************************************/
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/* Host commands */
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static enum ec_status device_event_cmd(struct host_cmd_handler_args *args)
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{
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const struct ec_params_device_event *p = args->params;
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struct ec_response_device_event *r = args->response;
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switch (p->param) {
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case EC_DEVICE_EVENT_PARAM_GET_CURRENT_EVENTS:
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r->event_mask = device_get_and_clear_events();
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break;
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case EC_DEVICE_EVENT_PARAM_GET_ENABLED_EVENTS:
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r->event_mask = device_get_enabled_events();
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break;
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case EC_DEVICE_EVENT_PARAM_SET_ENABLED_EVENTS:
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device_set_enabled_events(p->event_mask);
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r->event_mask = device_get_enabled_events();
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break;
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default:
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return EC_RES_INVALID_PARAM;
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}
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args->response_size = sizeof(*r);
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_DEVICE_EVENT, device_event_cmd, EC_VER_MASK(0));
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