1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <bsp/sc16is752.h>
#include <rtems/irq-extension.h>
static void atsam_sc16i752_irqs_handler(void *arg)
{
atsam_sc16is752_spi_context *ctx = arg;
sc16is752_interrupt_handler(&ctx->base.base);
PIO_EnableIt(&ctx->irq_pin);
}
static void atsam_sc16i752_interrupt(const Pin *pin, void *arg)
{
atsam_sc16is752_spi_context *ctx = arg;
if(PIO_ItIsActive(&ctx->irq_pin)) {
PIO_DisableIt(&ctx->irq_pin);
rtems_interrupt_server_entry_submit(&ctx->irqs_entry);
}
}
static bool atsam_sc16is752_install_interrupt(sc16is752_context *base)
{
atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
rtems_status_code sc;
uint8_t rv;
sc = rtems_interrupt_server_entry_initialize(ctx->irqs_index,
&ctx->irqs_entry);
rtems_interrupt_server_action_prepend(&ctx->irqs_entry,
&ctx->irqs_action, atsam_sc16i752_irqs_handler, ctx);
rv = PIO_Configure(&ctx->irq_pin, 1);
PIO_ConfigureIt(&ctx->irq_pin, atsam_sc16i752_interrupt, ctx);
PIO_EnableIt(&ctx->irq_pin);
return (sc == RTEMS_SUCCESSFUL) && (rv == 1);
}
static void atsam_sc16is752_remove_interrupt(sc16is752_context *base)
{
atsam_sc16is752_spi_context *ctx = (atsam_sc16is752_spi_context *)base;
rtems_status_code sc;
PIO_DisableIt(&ctx->irq_pin);
sc = PIO_RemoveIt(&ctx->irq_pin, atsam_sc16i752_interrupt, ctx);
assert(sc == RTEMS_SUCCESSFUL);
}
int atsam_sc16is752_spi_create(
atsam_sc16is752_spi_context *ctx,
const atsam_sc16is752_spi_config *config
)
{
ctx->base.base.mode = config->mode;
ctx->base.base.input_frequency = config->input_frequency;
ctx->base.base.install_irq = atsam_sc16is752_install_interrupt;
ctx->base.base.remove_irq = atsam_sc16is752_remove_interrupt;
ctx->base.spi_path = config->spi_path;
ctx->base.cs = config->spi_chip_select;
ctx->base.speed_hz = config->spi_speed_hz;
ctx->irq_pin = config->irq_pin;
ctx->irqs_index = config->server_index;
return sc16is752_spi_create(&ctx->base, config->device_path);
}
|