drivers/net/wireless/ath/ath10k/spectral.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ath/ath10k/spectral.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ath/ath10k/spectral.c
Extension
.c
Size
14361 bytes
Lines
551
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct file_operations fops_spec_scan_ctl = {
	.read = read_file_spec_scan_ctl,
	.write = write_file_spec_scan_ctl,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_spectral_count(struct file *file,
					char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct ath10k *ar = file->private_data;
	char buf[32];
	size_t len;
	u8 spectral_count;

	mutex_lock(&ar->conf_mutex);
	spectral_count = ar->spectral.config.count;
	mutex_unlock(&ar->conf_mutex);

	len = sprintf(buf, "%d\n", spectral_count);
	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_spectral_count(struct file *file,
					 const char __user *user_buf,
					 size_t count, loff_t *ppos)
{
	struct ath10k *ar = file->private_data;
	unsigned long val;
	ssize_t ret;

	ret = kstrtoul_from_user(user_buf, count, 0, &val);
	if (ret)
		return ret;

	if (val > 255)
		return -EINVAL;

	mutex_lock(&ar->conf_mutex);
	ar->spectral.config.count = val;
	mutex_unlock(&ar->conf_mutex);

	return count;
}

static const struct file_operations fops_spectral_count = {
	.read = read_file_spectral_count,
	.write = write_file_spectral_count,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t read_file_spectral_bins(struct file *file,
				       char __user *user_buf,
				       size_t count, loff_t *ppos)
{
	struct ath10k *ar = file->private_data;
	char buf[32];
	unsigned int bins, fft_size, bin_scale;
	size_t len;

	mutex_lock(&ar->conf_mutex);

	fft_size = ar->spectral.config.fft_size;
	bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT;
	bins = 1 << (fft_size - bin_scale);

	mutex_unlock(&ar->conf_mutex);

	len = sprintf(buf, "%d\n", bins);
	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_spectral_bins(struct file *file,
					const char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct ath10k *ar = file->private_data;
	unsigned long val;
	ssize_t ret;

	ret = kstrtoul_from_user(user_buf, count, 0, &val);
	if (ret)
		return ret;

	if (val < 64 || val > SPECTRAL_ATH10K_MAX_NUM_BINS)
		return -EINVAL;

Annotation

Implementation Notes