| Alex Elder | d7f5f3c | 2020-03-05 22:28:15 -0600 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | |
| 3 | /* |
| 4 | * Qualcomm IPA notification subdev support |
| 5 | * |
| 6 | * Copyright (C) 2019 Linaro Ltd. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/remoteproc.h> |
| 12 | #include <linux/remoteproc/qcom_q6v5_ipa_notify.h> |
| 13 | |
| 14 | static void |
| 15 | ipa_notify_common(struct rproc_subdev *subdev, enum qcom_rproc_event event) |
| 16 | { |
| 17 | struct qcom_rproc_ipa_notify *ipa_notify; |
| 18 | qcom_ipa_notify_t notify; |
| 19 | |
| 20 | ipa_notify = container_of(subdev, struct qcom_rproc_ipa_notify, subdev); |
| 21 | notify = ipa_notify->notify; |
| 22 | if (notify) |
| 23 | notify(ipa_notify->data, event); |
| 24 | } |
| 25 | |
| 26 | static int ipa_notify_prepare(struct rproc_subdev *subdev) |
| 27 | { |
| 28 | ipa_notify_common(subdev, MODEM_STARTING); |
| 29 | |
| 30 | return 0; |
| 31 | } |
| 32 | |
| 33 | static int ipa_notify_start(struct rproc_subdev *subdev) |
| 34 | { |
| 35 | ipa_notify_common(subdev, MODEM_RUNNING); |
| 36 | |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | static void ipa_notify_stop(struct rproc_subdev *subdev, bool crashed) |
| 41 | |
| 42 | { |
| 43 | ipa_notify_common(subdev, crashed ? MODEM_CRASHED : MODEM_STOPPING); |
| 44 | } |
| 45 | |
| 46 | static void ipa_notify_unprepare(struct rproc_subdev *subdev) |
| 47 | { |
| 48 | ipa_notify_common(subdev, MODEM_OFFLINE); |
| 49 | } |
| 50 | |
| 51 | static void ipa_notify_removing(struct rproc_subdev *subdev) |
| 52 | { |
| 53 | ipa_notify_common(subdev, MODEM_REMOVING); |
| 54 | } |
| 55 | |
| 56 | /* Register the IPA notification subdevice with the Q6V5 MSS remoteproc */ |
| 57 | void qcom_add_ipa_notify_subdev(struct rproc *rproc, |
| 58 | struct qcom_rproc_ipa_notify *ipa_notify) |
| 59 | { |
| 60 | ipa_notify->notify = NULL; |
| 61 | ipa_notify->data = NULL; |
| 62 | ipa_notify->subdev.prepare = ipa_notify_prepare; |
| 63 | ipa_notify->subdev.start = ipa_notify_start; |
| 64 | ipa_notify->subdev.stop = ipa_notify_stop; |
| 65 | ipa_notify->subdev.unprepare = ipa_notify_unprepare; |
| 66 | |
| 67 | rproc_add_subdev(rproc, &ipa_notify->subdev); |
| 68 | } |
| 69 | EXPORT_SYMBOL_GPL(qcom_add_ipa_notify_subdev); |
| 70 | |
| 71 | /* Remove the IPA notification subdevice */ |
| 72 | void qcom_remove_ipa_notify_subdev(struct rproc *rproc, |
| 73 | struct qcom_rproc_ipa_notify *ipa_notify) |
| 74 | { |
| 75 | struct rproc_subdev *subdev = &ipa_notify->subdev; |
| 76 | |
| 77 | ipa_notify_removing(subdev); |
| 78 | |
| 79 | rproc_remove_subdev(rproc, subdev); |
| 80 | ipa_notify->notify = NULL; /* Make it obvious */ |
| 81 | } |
| 82 | EXPORT_SYMBOL_GPL(qcom_remove_ipa_notify_subdev); |
| 83 | |
| 84 | MODULE_LICENSE("GPL v2"); |
| 85 | MODULE_DESCRIPTION("Qualcomm IPA notification remoteproc subdev"); |