| /* Copyright (c) 2016, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/module.h> |
| #include <soc/qcom/scm.h> |
| #include <soc/qcom/subsystem_restart.h> |
| #include <soc/qcom/subsystem_notif.h> |
| #include "audio_ssr.h" |
| |
| #define SCM_Q6_NMI_CMD 0x1 |
| |
| static char *audio_ssr_domains[] = { |
| "adsp", |
| "modem" |
| }; |
| |
| void *audio_ssr_register(int domain_id, struct notifier_block *nb) |
| { |
| if ((domain_id < 0) || |
| (domain_id >= AUDIO_SSR_DOMAIN_MAX)) { |
| pr_err("%s: Invalid service ID %d\n", __func__, domain_id); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| return subsys_notif_register_notifier( |
| audio_ssr_domains[domain_id], nb); |
| } |
| EXPORT_SYMBOL(audio_ssr_register); |
| |
| int audio_ssr_deregister(void *handle, struct notifier_block *nb) |
| { |
| return subsys_notif_unregister_notifier(handle, nb); |
| } |
| EXPORT_SYMBOL(audio_ssr_deregister); |
| |
| void audio_ssr_send_nmi(void *ssr_cb_data) |
| { |
| struct notif_data *data = (struct notif_data *)ssr_cb_data; |
| struct scm_desc desc; |
| |
| if (data && data->crashed) { |
| /* Send NMI to QDSP6 via an SCM call. */ |
| if (!is_scm_armv8()) { |
| scm_call_atomic1(SCM_SVC_UTIL, |
| SCM_Q6_NMI_CMD, 0x1); |
| } else { |
| desc.args[0] = 0x1; |
| desc.arginfo = SCM_ARGS(1); |
| scm_call2_atomic(SCM_SIP_FNID(SCM_SVC_UTIL, |
| SCM_Q6_NMI_CMD), &desc); |
| } |
| /* The write should go through before q6 is shutdown */ |
| mb(); |
| pr_debug("%s: Q6 NMI was sent.\n", __func__); |
| } |
| } |
| EXPORT_SYMBOL(audio_ssr_send_nmi); |