thinkpad-acpi: enhanced debugging messages for rfkill subdrivers
Enhance debugging messages for all rfkill subdrivers in thinkpad-acpi.
Also, log a warning if the deprecated sysfs attributes are in use.
These attributes are going to be removed sometime in 2010.
There is an user-visible side-effect: we now coalesce attempts to
enable/disable bluetooth or WWAN in the procfs interface, instead of
hammering the firmware with multiple requests.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index bce1d95..7daca05 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -1494,6 +1494,8 @@
accessing some functions of the driver
0x0001 Initialization and probing
0x0002 Removal
+ 0x0004 RF Transmitter control (RFKILL)
+ (bluetooth, WWAN, UWB...)
There is also a kernel build option to enable more debugging
information, which may be necessary to debug driver problems.
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 38c34c7..57ab551 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -189,6 +189,7 @@
#define TPACPI_DBG_DISCLOSETASK 0x8000
#define TPACPI_DBG_INIT 0x0001
#define TPACPI_DBG_EXIT 0x0002
+#define TPACPI_DBG_RFKILL 0x0004
#define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
#define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
@@ -1016,10 +1017,13 @@
/* try to set the initial state as the default for the rfkill
* type, since we ask the firmware to preserve it across S5 in
* NVRAM */
- rfkill_set_default(rfktype,
+ if (rfkill_set_default(rfktype,
(initial_state == RFKILL_STATE_UNBLOCKED) ?
RFKILL_STATE_UNBLOCKED :
- RFKILL_STATE_SOFT_BLOCKED);
+ RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "Default state for %s cannot be changed\n",
+ name);
}
*rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
@@ -3018,13 +3022,17 @@
TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
};
+#define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
+
static struct rfkill *tpacpi_bluetooth_rfkill;
static void bluetooth_suspend(pm_message_t state)
{
/* Try to make sure radio will resume powered off */
- acpi_evalf(NULL, NULL, "\\BLTH", "vd",
- TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
+ if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
+ TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "bluetooth power down on resume request failed\n");
}
static int bluetooth_get_radiosw(void)
@@ -3062,6 +3070,10 @@
if (status < 0)
return;
rfkill_force_state(tpacpi_bluetooth_rfkill, status);
+
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "forced rfkill state to %d\n",
+ status);
}
static int bluetooth_set_radiosw(int radio_on, int update_rfk)
@@ -3077,6 +3089,9 @@
&& radio_on)
return -EPERM;
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "will %s bluetooth\n", radio_on ? "enable" : "disable");
+
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul) {
tpacpi_bluetooth_emulstate = !!radio_on;
@@ -3129,6 +3144,8 @@
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
+ tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
+
res = bluetooth_set_radiosw(t, 1);
return (res) ? res : count;
@@ -3162,6 +3179,8 @@
static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
{
+ dbg_printk(TPACPI_DBG_RFKILL,
+ "request to change radio state to %d\n", state);
return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
}
@@ -3172,6 +3191,9 @@
TP_ACPI_BLTH_SAVE_STATE))
printk(TPACPI_NOTICE
"failed to save bluetooth state to NVRAM\n");
+ else
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "bluestooth state saved to NVRAM\n");
}
static void bluetooth_exit(void)
@@ -3190,7 +3212,8 @@
int res;
int status = 0;
- vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "initializing bluetooth subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
@@ -3199,7 +3222,8 @@
tp_features.bluetooth = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GBDC", "qd");
- vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "bluetooth is %s, status 0x%02x\n",
str_supported(tp_features.bluetooth),
status);
@@ -3214,7 +3238,7 @@
!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
/* no bluetooth hardware present in system */
tp_features.bluetooth = 0;
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"bluetooth hardware not installed\n");
}
@@ -3229,7 +3253,7 @@
res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
&tpacpi_bluetooth_rfkill,
RFKILL_TYPE_BLUETOOTH,
- "tpacpi_bluetooth_sw",
+ TPACPI_RFK_BLUETOOTH_SW_NAME,
true,
tpacpi_bluetooth_rfk_set,
tpacpi_bluetooth_rfk_get);
@@ -3262,19 +3286,27 @@
static int bluetooth_write(char *buf)
{
char *cmd;
+ int state = -1;
if (!tp_features.bluetooth)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
- bluetooth_set_radiosw(1, 1);
+ state = 1;
} else if (strlencmp(cmd, "disable") == 0) {
- bluetooth_set_radiosw(0, 1);
+ state = 0;
} else
return -EINVAL;
}
+ if (state != -1) {
+ tpacpi_disclose_usertask("procfs bluetooth",
+ "attempt to %s\n",
+ state ? "enable" : "disable");
+ bluetooth_set_radiosw(state, 1);
+ }
+
return 0;
}
@@ -3299,13 +3331,17 @@
off / last state */
};
+#define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
+
static struct rfkill *tpacpi_wan_rfkill;
static void wan_suspend(pm_message_t state)
{
/* Try to make sure radio will resume powered off */
- acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
- TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
+ if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
+ TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "WWAN power down on resume request failed\n");
}
static int wan_get_radiosw(void)
@@ -3343,6 +3379,10 @@
if (status < 0)
return;
rfkill_force_state(tpacpi_wan_rfkill, status);
+
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "forced rfkill state to %d\n",
+ status);
}
static int wan_set_radiosw(int radio_on, int update_rfk)
@@ -3358,6 +3398,9 @@
&& radio_on)
return -EPERM;
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "will %s WWAN\n", radio_on ? "enable" : "disable");
+
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul) {
tpacpi_wwan_emulstate = !!radio_on;
@@ -3410,6 +3453,8 @@
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
+ tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
+
res = wan_set_radiosw(t, 1);
return (res) ? res : count;
@@ -3443,6 +3488,8 @@
static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
{
+ dbg_printk(TPACPI_DBG_RFKILL,
+ "request to change radio state to %d\n", state);
return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
}
@@ -3453,6 +3500,9 @@
TP_ACPI_WGSV_SAVE_STATE))
printk(TPACPI_NOTICE
"failed to save WWAN state to NVRAM\n");
+ else
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "WWAN state saved to NVRAM\n");
}
static void wan_exit(void)
@@ -3471,14 +3521,16 @@
int res;
int status = 0;
- vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "initializing wan subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
tp_features.wan = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GWAN", "qd");
- vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "wan is %s, status 0x%02x\n",
str_supported(tp_features.wan),
status);
@@ -3493,7 +3545,7 @@
!(status & TP_ACPI_WANCARD_HWPRESENT)) {
/* no wan hardware present in system */
tp_features.wan = 0;
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"wan hardware not installed\n");
}
@@ -3508,7 +3560,7 @@
res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
&tpacpi_wan_rfkill,
RFKILL_TYPE_WWAN,
- "tpacpi_wwan_sw",
+ TPACPI_RFK_WWAN_SW_NAME,
true,
tpacpi_wan_rfk_set,
tpacpi_wan_rfk_get);
@@ -3526,6 +3578,8 @@
int len = 0;
int status = wan_get_radiosw();
+ tpacpi_disclose_usertask("procfs wan", "read");
+
if (!tp_features.wan)
len += sprintf(p + len, "status:\t\tnot supported\n");
else {
@@ -3541,19 +3595,27 @@
static int wan_write(char *buf)
{
char *cmd;
+ int state = -1;
if (!tp_features.wan)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
- wan_set_radiosw(1, 1);
+ state = 1;
} else if (strlencmp(cmd, "disable") == 0) {
- wan_set_radiosw(0, 1);
+ state = 0;
} else
return -EINVAL;
}
+ if (state != -1) {
+ tpacpi_disclose_usertask("procfs wan",
+ "attempt to %s\n",
+ state ? "enable" : "disable");
+ wan_set_radiosw(state, 1);
+ }
+
return 0;
}
@@ -3576,6 +3638,8 @@
TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
};
+#define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
+
static struct rfkill *tpacpi_uwb_rfkill;
static int uwb_get_radiosw(void)
@@ -3613,6 +3677,10 @@
if (status < 0)
return;
rfkill_force_state(tpacpi_uwb_rfkill, status);
+
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "forced rfkill state to %d\n",
+ status);
}
static int uwb_set_radiosw(int radio_on, int update_rfk)
@@ -3628,6 +3696,9 @@
&& radio_on)
return -EPERM;
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "will %s UWB\n", radio_on ? "enable" : "disable");
+
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_uwbemul) {
tpacpi_uwb_emulstate = !!radio_on;
@@ -3662,6 +3733,8 @@
static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
{
+ dbg_printk(TPACPI_DBG_RFKILL,
+ "request to change radio state to %d\n", state);
return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
}
@@ -3676,14 +3749,16 @@
int res;
int status = 0;
- vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "initializing uwb subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
tp_features.uwb = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GUWB", "qd");
- vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "uwb is %s, status 0x%02x\n",
str_supported(tp_features.uwb),
status);
@@ -3708,7 +3783,7 @@
res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
&tpacpi_uwb_rfkill,
RFKILL_TYPE_UWB,
- "tpacpi_uwb_sw",
+ TPACPI_RFK_UWB_SW_NAME,
false,
tpacpi_uwb_rfk_set,
tpacpi_uwb_rfk_get);
