ACPI: thinkpad-acpi: add sysfs support to wan and bluetooth subdrivers

Add support to sysfs to the wan and bluetooth subdrivers.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 136 insertions, 12 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 83a8d984e70..6c36a55cb3d 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1020,8 +1020,54 @@ static struct ibm_struct hotkey_driver_data = {
  * Bluetooth subdriver
  */
 
+/* sysfs bluetooth enable ---------------------------------------------- */
+static ssize_t bluetooth_enable_show(struct device *dev,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        int status;
+
+        status = bluetooth_get_radiosw();
+        if (status < 0)
+                return status;
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
+}
+
+static ssize_t bluetooth_enable_store(struct device *dev,
+                            struct device_attribute *attr,
+                            const char *buf, size_t count)
+{
+        unsigned long t;
+        int res;
+
+        if (parse_strtoul(buf, 1, &t))
+                return -EINVAL;
+
+        res = bluetooth_set_radiosw(t);
+
+        return (res) ? res : count;
+}
+
+static struct device_attribute dev_attr_bluetooth_enable =
+        __ATTR(enable, S_IWUSR | S_IRUGO,
+                bluetooth_enable_show, bluetooth_enable_store);
+
+/* --------------------------------------------------------------------- */
+
+static struct attribute *bluetooth_attributes[] = {
+        &dev_attr_bluetooth_enable.attr,
+        NULL
+};
+
+static const struct attribute_group bluetooth_attr_group = {
+        .name = TPACPI_BLUETH_SYSFS_GROUP,
+        .attrs = bluetooth_attributes,
+};
+
 static int __init bluetooth_init(struct ibm_init_struct *iibm)
 {
+        int res;
         int status = 0;
 
         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
@@ -1037,17 +1083,29 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
                 str_supported(tp_features.bluetooth),
                 status);
 
-        if (tp_features.bluetooth &&
-            !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
-                /* no bluetooth hardware present in system */
-                tp_features.bluetooth = 0;
-                dbg_printk(TPACPI_DBG_INIT,
-                           "bluetooth hardware not installed\n");
+        if (tp_features.bluetooth) {
+                if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
+                        /* no bluetooth hardware present in system */
+                        tp_features.bluetooth = 0;
+                        dbg_printk(TPACPI_DBG_INIT,
+                                   "bluetooth hardware not installed\n");
+                } else {
+                        res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
+                                        &bluetooth_attr_group);
+                        if (res)
+                                return res;
+                }
         }
 
         return (tp_features.bluetooth)? 0 : 1;
 }
 
+static void bluetooth_exit(void)
+{
+        sysfs_remove_group(&tpacpi_pdev->dev.kobj,
+                        &bluetooth_attr_group);
+}
+
 static int bluetooth_get_radiosw(void)
 {
         int status;
@@ -1080,6 +1138,7 @@ static int bluetooth_set_radiosw(int radio_on)
         return 0;
 }
 
+/* procfs -------------------------------------------------------------- */
 static int bluetooth_read(char *p)
 {
         int len = 0;
@@ -1119,14 +1178,61 @@ static struct ibm_struct bluetooth_driver_data = {
         .name = "bluetooth",
         .read = bluetooth_read,
         .write = bluetooth_write,
+        .exit = bluetooth_exit,
 };
 
 /*************************************************************************
  * Wan subdriver
  */
 
+/* sysfs wan enable ---------------------------------------------------- */
+static ssize_t wan_enable_show(struct device *dev,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        int status;
+
+        status = wan_get_radiosw();
+        if (status < 0)
+                return status;
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
+}
+
+static ssize_t wan_enable_store(struct device *dev,
+                            struct device_attribute *attr,
+                            const char *buf, size_t count)
+{
+        unsigned long t;
+        int res;
+
+        if (parse_strtoul(buf, 1, &t))
+                return -EINVAL;
+
+        res = wan_set_radiosw(t);
+
+        return (res) ? res : count;
+}
+
+static struct device_attribute dev_attr_wan_enable =
+        __ATTR(enable, S_IWUSR | S_IRUGO,
+                wan_enable_show, wan_enable_store);
+
+/* --------------------------------------------------------------------- */
+
+static struct attribute *wan_attributes[] = {
+        &dev_attr_wan_enable.attr,
+        NULL
+};
+
+static const struct attribute_group wan_attr_group = {
+        .name = TPACPI_WAN_SYSFS_GROUP,
+        .attrs = wan_attributes,
+};
+
 static int __init wan_init(struct ibm_init_struct *iibm)
 {
+        int res;
         int status = 0;
 
         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
@@ -1140,17 +1246,29 @@ static int __init wan_init(struct ibm_init_struct *iibm)
                 str_supported(tp_features.wan),
                 status);
 
-        if (tp_features.wan &&
-            !(status & TP_ACPI_WANCARD_HWPRESENT)) {
-                /* no wan hardware present in system */
-                tp_features.wan = 0;
-                dbg_printk(TPACPI_DBG_INIT,
-                           "wan hardware not installed\n");
+        if (tp_features.wan) {
+                if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
+                        /* no wan hardware present in system */
+                        tp_features.wan = 0;
+                        dbg_printk(TPACPI_DBG_INIT,
+                                   "wan hardware not installed\n");
+                } else {
+                        res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
+                                        &wan_attr_group);
+                        if (res)
+                                return res;
+                }
         }
 
         return (tp_features.wan)? 0 : 1;
 }
 
+static void wan_exit(void)
+{
+        sysfs_remove_group(&tpacpi_pdev->dev.kobj,
+                &wan_attr_group);
+}
+
 static int wan_get_radiosw(void)
 {
         int status;
@@ -1183,6 +1301,7 @@ static int wan_set_radiosw(int radio_on)
         return 0;
 }
 
+/* procfs -------------------------------------------------------------- */
 static int wan_read(char *p)
 {
         int len = 0;
@@ -1222,6 +1341,7 @@ static struct ibm_struct wan_driver_data = {
         .name = "wan",
         .read = wan_read,
         .write = wan_write,
+        .exit = wan_exit,
         .flags.experimental = 1,
 };
 
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 7615adb381c..a6c28558586 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -278,6 +278,8 @@ static int beep_write(char *buf);
  * Bluetooth subdriver
  */
 
+#define TPACPI_BLUETH_SYSFS_GROUP "bluetooth"
+
 enum {
         /* ACPI GBDC/SBDC bits */
         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
@@ -551,6 +553,8 @@ static int volume_write(char *buf);
  * Wan subdriver
  */
 
+#define TPACPI_WAN_SYSFS_GROUP "wwan"
+
 enum {
         /* ACPI GWAN/SWAN bits */
         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */