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Commit 9bff0bc4 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

ath9k: add debugfs files for reading/writing registers 



Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 15340694

drivers/net/wireless/ath/ath9k/debug.c

+89 −0
Original line number Original line Diff line number Diff line
@@ -794,6 +794,86 @@ static const struct file_operations fops_recv = { 
	.owner = THIS_MODULE

	.owner = THIS_MODULE

};

};





static ssize_t read_file_regidx(struct file *file, char __user *user_buf,

                                size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	char buf[32];

	unsigned int len;



	len = snprintf(buf, sizeof(buf), "0x%08x\n", sc->debug.regidx);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);

}



static ssize_t write_file_regidx(struct file *file, const char __user *user_buf,

			     size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	unsigned long regidx;

	char buf[32];

	ssize_t len;



	len = min(count, sizeof(buf) - 1);

	if (copy_from_user(buf, user_buf, len))

		return -EINVAL;



	buf[len] = '\0';

	if (strict_strtoul(buf, 0, &regidx))

		return -EINVAL;



	sc->debug.regidx = regidx;

	return count;

}



static const struct file_operations fops_regidx = {

	.read = read_file_regidx,

	.write = write_file_regidx,

	.open = ath9k_debugfs_open,

	.owner = THIS_MODULE

};



static ssize_t read_file_regval(struct file *file, char __user *user_buf,

			     size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	struct ath_hw *ah = sc->sc_ah;

	char buf[32];

	unsigned int len;

	u32 regval;



	regval = REG_READ_D(ah, sc->debug.regidx);

	len = snprintf(buf, sizeof(buf), "0x%08x\n", regval);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);

}



static ssize_t write_file_regval(struct file *file, const char __user *user_buf,

			     size_t count, loff_t *ppos)

{

	struct ath_softc *sc = file->private_data;

	struct ath_hw *ah = sc->sc_ah;

	unsigned long regval;

	char buf[32];

	ssize_t len;



	len = min(count, sizeof(buf) - 1);

	if (copy_from_user(buf, user_buf, len))

		return -EINVAL;



	buf[len] = '\0';

	if (strict_strtoul(buf, 0, &regval))

		return -EINVAL;



	REG_WRITE_D(ah, sc->debug.regidx, regval);

	return count;

}



static const struct file_operations fops_regval = {

	.read = read_file_regval,

	.write = write_file_regval,

	.open = ath9k_debugfs_open,

	.owner = THIS_MODULE

};



int ath9k_init_debug(struct ath_hw *ah)

int ath9k_init_debug(struct ath_hw *ah)

{

{

	struct ath_common *common = ath9k_hw_common(ah);

	struct ath_common *common = ath9k_hw_common(ah);
@@ -845,6 +925,15 @@ int ath9k_init_debug(struct ath_hw *ah) 
			sc->debug.debugfs_phy, sc, &fops_tx_chainmask))

			sc->debug.debugfs_phy, sc, &fops_tx_chainmask))

		goto err;

		goto err;





	if (!debugfs_create_file("regidx", S_IRUSR | S_IWUSR,

			sc->debug.debugfs_phy, sc, &fops_regidx))

		goto err;



	if (!debugfs_create_file("regval", S_IRUSR | S_IWUSR,

			sc->debug.debugfs_phy, sc, &fops_regval))

		goto err;



	sc->debug.regidx = 0;

	return 0;

	return 0;

err:

err:

	ath9k_exit_debug(ah);

	ath9k_exit_debug(ah);

drivers/net/wireless/ath/ath9k/debug.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -153,6 +153,7 @@ struct ath_stats { 




struct ath9k_debug {

struct ath9k_debug {

	struct dentry *debugfs_phy;

	struct dentry *debugfs_phy;

	u32 regidx;

	struct ath_stats stats;

	struct ath_stats stats;

};

};