USB: gadget: Add debugfs entry to show the type of USB charger connected.
USB driver supports the different type of USB chargers mentioned in the
battery charging spec(1.2). Add debugfs entries to show up the type of
USB charger connected for the user.
Signed-off-by: Anji jonnala <anjir@codeaurora.org>
diff --git a/drivers/usb/otg/msm_otg.c b/drivers/usb/otg/msm_otg.c
index f5f1b51..b093015 100644
--- a/drivers/usb/otg/msm_otg.c
+++ b/drivers/usb/otg/msm_otg.c
@@ -1261,6 +1261,20 @@
ulpi_write(otg, func_ctrl, ULPI_FUNC_CTRL);
}
+static const char *chg_to_string(enum usb_chg_type chg_type)
+{
+ switch (chg_type) {
+ case USB_SDP_CHARGER: return "USB_SDP_CHARGER";
+ case USB_DCP_CHARGER: return "USB_DCP_CHARGER";
+ case USB_CDP_CHARGER: return "USB_CDP_CHARGER";
+ case USB_ACA_A_CHARGER: return "USB_ACA_A_CHARGER";
+ case USB_ACA_B_CHARGER: return "USB_ACA_B_CHARGER";
+ case USB_ACA_C_CHARGER: return "USB_ACA_C_CHARGER";
+ case USB_ACA_DOCK_CHARGER: return "USB_ACA_DOCK_CHARGER";
+ default: return "INVALID_CHARGER";
+ }
+}
+
#define MSM_CHG_DCD_POLL_TIME (100 * HZ/1000) /* 100 msec */
#define MSM_CHG_DCD_MAX_RETRIES 6 /* Tdcd_tmout = 6 * 100 msec */
#define MSM_CHG_PRIMARY_DET_TIME (40 * HZ/1000) /* TVDPSRC_ON */
@@ -1341,7 +1355,8 @@
msm_chg_block_off(motg);
msm_chg_enable_aca_det(motg);
msm_chg_enable_aca_intr(motg);
- dev_dbg(otg->dev, "charger = %d\n", motg->chg_type);
+ dev_dbg(otg->dev, "chg_type = %s\n",
+ chg_to_string(motg->chg_type));
schedule_work(&motg->sm_work);
return;
default:
@@ -1708,21 +1723,61 @@
.release = single_release,
};
+static int msm_otg_show_chg_type(struct seq_file *s, void *unused)
+{
+ struct msm_otg *motg = s->private;
+
+ seq_printf(s, chg_to_string(motg->chg_type));
+ return 0;
+}
+
+static int msm_otg_chg_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, msm_otg_show_chg_type, inode->i_private);
+}
+
+const struct file_operations msm_otg_chg_fops = {
+ .open = msm_otg_chg_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static struct dentry *msm_otg_dbg_root;
static struct dentry *msm_otg_dbg_mode;
+static struct dentry *msm_otg_chg_type;
static int msm_otg_debugfs_init(struct msm_otg *motg)
{
+
msm_otg_dbg_root = debugfs_create_dir("msm_otg", NULL);
if (!msm_otg_dbg_root || IS_ERR(msm_otg_dbg_root))
return -ENODEV;
- msm_otg_dbg_mode = debugfs_create_file("mode", S_IRUGO | S_IWUSR,
- msm_otg_dbg_root, motg, &msm_otg_mode_fops);
- if (!msm_otg_dbg_mode) {
+ if (motg->pdata->mode == USB_OTG &&
+ motg->pdata->otg_control == OTG_USER_CONTROL) {
+
+ msm_otg_dbg_mode = debugfs_create_file("mode", S_IRUGO |
+ S_IWUSR, msm_otg_dbg_root, motg,
+ &msm_otg_mode_fops);
+
+ if (!msm_otg_dbg_mode) {
+ debugfs_remove(msm_otg_dbg_root);
+ msm_otg_dbg_root = NULL;
+ return -ENODEV;
+ }
+ }
+
+ msm_otg_chg_type = debugfs_create_file("chg_type", S_IRUGO,
+ msm_otg_dbg_root, motg,
+ &msm_otg_chg_fops);
+
+ if (!msm_otg_chg_type) {
+ debugfs_remove(msm_otg_dbg_mode);
debugfs_remove(msm_otg_dbg_root);
msm_otg_dbg_root = NULL;
+ msm_otg_dbg_mode = NULL;
return -ENODEV;
}
@@ -1731,8 +1786,7 @@
static void msm_otg_debugfs_cleanup(void)
{
- debugfs_remove(msm_otg_dbg_mode);
- debugfs_remove(msm_otg_dbg_root);
+ debugfs_remove_recursive(msm_otg_dbg_root);
}
static int __init msm_otg_probe(struct platform_device *pdev)
@@ -1909,13 +1963,10 @@
device_init_wakeup(&pdev->dev, 1);
motg->mA_port = IUNIT;
- if (motg->pdata->mode == USB_OTG &&
- motg->pdata->otg_control == OTG_USER_CONTROL) {
- ret = msm_otg_debugfs_init(motg);
- if (ret)
- dev_dbg(&pdev->dev, "mode debugfs file is"
- "not available\n");
- }
+ ret = msm_otg_debugfs_init(motg);
+ if (ret)
+ dev_dbg(&pdev->dev, "mode debugfs file is"
+ "not available\n");
if (motg->pdata->otg_control == OTG_PMIC_CONTROL)
pm8921_charger_register_vbus_sn(&msm_otg_set_vbus_state);