2020-09-15 18:44:42 +02:00
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/*
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* Copyright (c) 2020 Nordic Semiconductor ASA
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* Copyright (c) 2018 Intel Corporation
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* Copyright (c) 2016 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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2022-05-06 11:12:04 +02:00
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#include <zephyr/kernel.h>
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#include <zephyr/init.h>
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2020-09-15 18:44:42 +02:00
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#include <usb_work_q.h>
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K_KERNEL_STACK_DEFINE(z_usb_work_q_stack, CONFIG_USB_WORKQUEUE_STACK_SIZE);
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struct k_work_q z_usb_work_q;
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init: remove the need for a dummy device pointer in SYS_INIT functions
The init infrastructure, found in `init.h`, is currently used by:
- `SYS_INIT`: to call functions before `main`
- `DEVICE_*`: to initialize devices
They are all sorted according to an initialization level + a priority.
`SYS_INIT` calls are really orthogonal to devices, however, the required
function signature requires a `const struct device *dev` as a first
argument. The only reason for that is because the same init machinery is
used by devices, so we have something like:
```c
struct init_entry {
int (*init)(const struct device *dev);
/* only set by DEVICE_*, otherwise NULL */
const struct device *dev;
}
```
As a result, we end up with such weird/ugly pattern:
```c
static int my_init(const struct device *dev)
{
/* always NULL! add ARG_UNUSED to avoid compiler warning */
ARG_UNUSED(dev);
...
}
```
This is really a result of poor internals isolation. This patch proposes
a to make init entries more flexible so that they can accept sytem
initialization calls like this:
```c
static int my_init(void)
{
...
}
```
This is achieved using a union:
```c
union init_function {
/* for SYS_INIT, used when init_entry.dev == NULL */
int (*sys)(void);
/* for DEVICE*, used when init_entry.dev != NULL */
int (*dev)(const struct device *dev);
};
struct init_entry {
/* stores init function (either for SYS_INIT or DEVICE*)
union init_function init_fn;
/* stores device pointer for DEVICE*, NULL for SYS_INIT. Allows
* to know which union entry to call.
*/
const struct device *dev;
}
```
This solution **does not increase ROM usage**, and allows to offer clean
public APIs for both SYS_INIT and DEVICE*. Note that however, init
machinery keeps a coupling with devices.
**NOTE**: This is a breaking change! All `SYS_INIT` functions will need
to be converted to the new signature. See the script offered in the
following commit.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
init: convert SYS_INIT functions to the new signature
Conversion scripted using scripts/utils/migrate_sys_init.py.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
manifest: update projects for SYS_INIT changes
Update modules with updated SYS_INIT calls:
- hal_ti
- lvgl
- sof
- TraceRecorderSource
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: devicetree: devices: adjust test
Adjust test according to the recently introduced SYS_INIT
infrastructure.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: kernel: threads: adjust SYS_INIT call
Adjust to the new signature: int (*init_fn)(void);
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
2022-10-19 09:33:44 +02:00
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static int z_usb_work_q_init(void)
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2020-09-15 18:44:42 +02:00
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{
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2021-03-31 17:31:30 +02:00
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k_work_queue_start(&z_usb_work_q,
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z_usb_work_q_stack,
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K_KERNEL_STACK_SIZEOF(z_usb_work_q_stack),
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CONFIG_USB_WORKQUEUE_PRIORITY, NULL);
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2020-09-15 18:44:42 +02:00
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k_thread_name_set(&z_usb_work_q.thread, "usbworkq");
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return 0;
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}
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SYS_INIT(z_usb_work_q_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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