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image_conf, make_scripts_riscv - Delete trailing spaces. Change tabs to 4 space multiples.
.c and .h get tabs expanded to four spaces for consistency, traliing whitespace whacked.
Makefiles do NOT get tabs changed.
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/*
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* Copyright (C) 2015-2017 Alibaba Group Holding Limited
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*/
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#include "device/vfs_pwm.h"
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#include "hal/soc/soc.h"
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#include "vfs_err.h"
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#include <utils_log.h>
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/* pwm driver struct */
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const struct file_ops pwm_ops =
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{
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.open = vfs_pwm_open,
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.close = vfs_pwm_close,
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.ioctl = vfs_pwm_ioctl
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};
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int vfs_pwm_open(inode_t *inode, file_t *fp)
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{
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int ret = -1; /* return value */
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pwm_dev_t *pwm_dev = NULL; /* device pointer */
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/* check empty pointer. */
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if ((fp != NULL) && (fp->node != NULL)) {
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/* Initialize if the device is first opened. */
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if (fp->node->refs == 1) {
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/* get the device pointer. */
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pwm_dev = (pwm_dev_t *)(fp->node->i_arg);
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/* init pwm device. */
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ret = hal_pwm_init_bydev(pwm_dev);
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} else {
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ret = VFS_SUCCESS;
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}
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} else {
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ret = -EINVAL;
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}
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return ret;
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}
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int vfs_pwm_close(file_t *fp)
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{
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int ret = -1; /* return value */
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pwm_dev_t *pwm_dev = NULL; /* device pointer */
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/* check empty pointer. */
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if ((fp != NULL) && (fp->node != NULL)) {
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/* close device if the device is last closed. */
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if (fp->node->refs == 1) {
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/* get the device pointer. */
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pwm_dev = (pwm_dev_t *)(fp->node->i_arg);
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if (pwm_dev != NULL) {
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/* turns off hardware. */
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ret = hal_pwm_finalize_bydev(pwm_dev);
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} else {
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ret = -EINVAL;
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}
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} else {
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ret = VFS_SUCCESS;
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}
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} else {
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ret = -EINVAL;
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}
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return ret;
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}
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int vfs_pwm_ioctl(file_t *fp, int cmd, unsigned long arg)
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{
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int ret = -1; /* return value */
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pwm_dev_t *pwm_dev = NULL; /* device pointer */
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float duty = 0;
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int32_t freq = 0;
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/* check empty pointer. */
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if ((fp == NULL) || (fp->node == NULL)) {
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return -EINVAL;
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}
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/* get the device pointer. */
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pwm_dev = (pwm_dev_t *)(fp->node->i_arg);
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if (pwm_dev == NULL) {
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return -EINVAL;
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}
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switch(cmd) {
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case IOCTL_PWM_OUTPUT_START:
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{
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ret = hal_pwm_start_bydev(pwm_dev);
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log_info("ioctl start.\r\n");
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}
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break;
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case IOCTL_PWM_OUTPUT_STOP:
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{
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log_info("ioctl stop.\r\n");
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ret = hal_pwm_stop_bydev(pwm_dev);
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}
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break;
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case IOCTL_PWM_OUTPUT_DUTY:
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{
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log_info("ioctl set duty.\r\n");
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if (0 == arg) {
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return -EINVAL;
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}
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duty = *(float *)arg;
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ret = hal_pwm_set_duty_bydev(pwm_dev, duty);
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}
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break;
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case IOCTL_PWM_OUTPUT_FREQ:
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{
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log_info("ioctl set freq.\r\n");
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if (0 == arg) {
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return -EINVAL;
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}
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freq = *(int32_t *)arg;
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ret = hal_pwm_set_freq_bydev(pwm_dev, freq);
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}
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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