Merge "cnss2: Add debugfs support to simulate device and firmware boot" (2e070923) · Commits · e / devices / android_kernel_xiaomi_markw

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;
		}