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Commit 4aac6651 authored by Yue Ma's avatar Yue Ma
Browse files

cnss2: Add debugfs support to simulate device and firmware boot 



Add debugfs interface to simulate device and firmware boot step
by step. This can provide the flexibility to debug both host and
device issues in boot path. The debugfs node will only be added
in debug builds.

Change-Id: I4cf03efad5e5a792095f509864fddd54dc6e2e7c
CRs-fixed: 2059087
Signed-off-by: default avatarYue Ma <yuem@codeaurora.org>
parent fb878ddd

drivers/net/wireless/cnss2/debug.c

+88 −5
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <linux/debugfs.h>

#include "main.h"

#include "debug.h"

#include "pci.h"



#define CNSS_IPC_LOG_PAGES		32
@@ -128,6 +129,83 @@ static const struct file_operations cnss_stats_fops = { 
	.llseek		= seq_lseek,

};



static ssize_t cnss_dev_boot_debug_write(struct file *fp,

					 const char __user *user_buf,

					 size_t count, loff_t *off)

{

	struct cnss_plat_data *plat_priv =

		((struct seq_file *)fp->private_data)->private;

	char buf[64];

	char *cmd;

	unsigned int len = 0;

	int ret = 0;



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

	if (copy_from_user(buf, user_buf, len))

		return -EFAULT;



	buf[len] = '\0';

	cmd = buf;



	if (sysfs_streq(cmd, "on")) {

		ret = cnss_power_on_device(plat_priv);

	} else if (sysfs_streq(cmd, "enumerate")) {

		ret = cnss_pci_init(plat_priv);

	} else if (sysfs_streq(cmd, "download")) {

		ret = cnss_pci_start_mhi(plat_priv->bus_priv);

	} else {

		cnss_pr_err("Device boot debugfs command is invalid\n");

		ret = -EINVAL;

	}



	if (ret)

		return ret;



	return count;

}



static int cnss_dev_boot_debug_show(struct seq_file *s, void *data)

{

	seq_puts(s, "\nUsage: echo <action> > <debugfs_path>/cnss/dev_boot\n");

	seq_puts(s, "<action> can be one of below:\n");

	seq_puts(s, "on: turn on device power, assert WLAN_EN\n");

	seq_puts(s, "enumerate: de-assert PERST, enumerate PCIe\n");

	seq_puts(s, "download: download FW and do QMI handshake with FW\n");



	return 0;

}



static int cnss_dev_boot_debug_open(struct inode *inode, struct file *file)

{

	return single_open(file, cnss_dev_boot_debug_show, inode->i_private);

}



static const struct file_operations cnss_dev_boot_debug_fops = {

	.read		= seq_read,

	.write		= cnss_dev_boot_debug_write,

	.release	= single_release,

	.open		= cnss_dev_boot_debug_open,

	.owner		= THIS_MODULE,

	.llseek		= seq_lseek,

};



#ifdef CONFIG_CNSS2_DEBUG

static int cnss_create_debug_only_node(struct cnss_plat_data *plat_priv)

{

	struct dentry *root_dentry = plat_priv->root_dentry;



	debugfs_create_file("dev_boot", 0600, root_dentry, plat_priv,

			    &cnss_dev_boot_debug_fops);



	return 0;

}

#else

static int cnss_create_debug_only_node(struct cnss_plat_data *plat_priv)

{

	return 0;

}

#endif



int cnss_debugfs_create(struct cnss_plat_data *plat_priv)

{

	int ret = 0;
@@ -139,11 +217,16 @@ int cnss_debugfs_create(struct cnss_plat_data *plat_priv) 
		cnss_pr_err("Unable to create debugfs %d\n", ret);

		goto out;

	}



	plat_priv->root_dentry = root_dentry;



	debugfs_create_file("pin_connect_result", 0644, root_dentry, plat_priv,

			    &cnss_pin_connect_fops);

	debugfs_create_file("stats", 0644, root_dentry, plat_priv,

			    &cnss_stats_fops);



	cnss_create_debug_only_node(plat_priv);



out:

	return ret;

}