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ACPI: thinkpad-acpi: debug facility to emulate the rf switches
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This code is required to keep the thinkpad-acpi maintainer sane, and
it is disabled by default.

Add a debug facility to simulate an rfkill hardware rocker switch, a
bluetooth rfkill soft-switch, a WWAN rfkill soft-switch on thinkpads.

The simulated switches obviously do not kill any radios in hardware or
firmware (unlike the real one).  They also don't issue deprecated proc
events.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
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Henrique de Moraes Holschuh authored and Len Brown committed Jan 15, 2009
1 parent e0b36fc commit a73f309
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11 changes: 11 additions & 0 deletions drivers/platform/x86/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -192,6 +192,17 @@ config THINKPAD_ACPI

If you have an IBM or Lenovo ThinkPad laptop, say Y or M here.

config THINKPAD_ACPI_DEBUGFACILITIES
bool "Maintainer debug facilities"
depends on THINKPAD_ACPI
default n
---help---
Enables extra stuff in the thinkpad-acpi which is completely useless
for normal use. Read the driver source to find out what it does.

Say N here, unless you were told by a kernel maintainer to do
otherwise.

config THINKPAD_ACPI_DEBUG
bool "Verbose debug mode"
depends on THINKPAD_ACPI
Expand Down
190 changes: 190 additions & 0 deletions drivers/platform/x86/thinkpad_acpi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -288,6 +288,16 @@ struct tpacpi_led_classdev {
unsigned int led;
};

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
static int dbg_wlswemul;
static int tpacpi_wlsw_emulstate;
static int dbg_bluetoothemul;
static int tpacpi_bluetooth_emulstate;
static int dbg_wwanemul;
static int tpacpi_wwan_emulstate;
#endif


/****************************************************************************
****************************************************************************
*
Expand Down Expand Up @@ -1006,6 +1016,94 @@ static DRIVER_ATTR(version, S_IRUGO,

/* --------------------------------------------------------------------- */

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES

static void tpacpi_send_radiosw_update(void);

/* wlsw_emulstate ------------------------------------------------------ */
static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
}

static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
const char *buf, size_t count)
{
unsigned long t;

if (parse_strtoul(buf, 1, &t))
return -EINVAL;

if (tpacpi_wlsw_emulstate != t) {
tpacpi_wlsw_emulstate = !!t;
tpacpi_send_radiosw_update();
} else
tpacpi_wlsw_emulstate = !!t;

return count;
}

static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
tpacpi_driver_wlsw_emulstate_show,
tpacpi_driver_wlsw_emulstate_store);

/* bluetooth_emulstate ------------------------------------------------- */
static ssize_t tpacpi_driver_bluetooth_emulstate_show(
struct device_driver *drv,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
}

static ssize_t tpacpi_driver_bluetooth_emulstate_store(
struct device_driver *drv,
const char *buf, size_t count)
{
unsigned long t;

if (parse_strtoul(buf, 1, &t))
return -EINVAL;

tpacpi_bluetooth_emulstate = !!t;

return count;
}

static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
tpacpi_driver_bluetooth_emulstate_show,
tpacpi_driver_bluetooth_emulstate_store);

/* wwan_emulstate ------------------------------------------------- */
static ssize_t tpacpi_driver_wwan_emulstate_show(
struct device_driver *drv,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
}

static ssize_t tpacpi_driver_wwan_emulstate_store(
struct device_driver *drv,
const char *buf, size_t count)
{
unsigned long t;

if (parse_strtoul(buf, 1, &t))
return -EINVAL;

tpacpi_wwan_emulstate = !!t;

return count;
}

static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
tpacpi_driver_wwan_emulstate_show,
tpacpi_driver_wwan_emulstate_store);

#endif

/* --------------------------------------------------------------------- */

static struct driver_attribute *tpacpi_driver_attributes[] = {
&driver_attr_debug_level, &driver_attr_version,
&driver_attr_interface_version,
Expand All @@ -1022,6 +1120,15 @@ static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
i++;
}

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (!res && dbg_wlswemul)
res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
if (!res && dbg_bluetoothemul)
res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
if (!res && dbg_wwanemul)
res = driver_create_file(drv, &driver_attr_wwan_emulstate);
#endif

return res;
}

Expand All @@ -1031,6 +1138,12 @@ static void tpacpi_remove_driver_attributes(struct device_driver *drv)

for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
driver_remove_file(drv, tpacpi_driver_attributes[i]);

#ifdef THINKPAD_ACPI_DEBUGFACILITIES
driver_remove_file(drv, &driver_attr_wlsw_emulstate);
driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
driver_remove_file(drv, &driver_attr_wwan_emulstate);
#endif
}

/****************************************************************************
Expand Down Expand Up @@ -1216,6 +1329,12 @@ static struct attribute_set *hotkey_dev_attributes;

static int hotkey_get_wlsw(int *status)
{
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wlswemul) {
*status = !!tpacpi_wlsw_emulstate;
return 0;
}
#endif
if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
return -EIO;
return 0;
Expand Down Expand Up @@ -2222,6 +2341,13 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
hotkey_source_mask, hotkey_poll_freq);
#endif

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wlswemul) {
tp_features.hotkey_wlsw = 1;
printk(TPACPI_INFO
"radio switch emulation enabled\n");
} else
#endif
/* Not all thinkpads have a hardware radio switch */
if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
tp_features.hotkey_wlsw = 1;
Expand Down Expand Up @@ -2656,6 +2782,12 @@ static int bluetooth_get_radiosw(void)
if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
return RFKILL_STATE_HARD_BLOCKED;

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul)
return (tpacpi_bluetooth_emulstate) ?
RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
#endif

if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
return -EIO;

Expand Down Expand Up @@ -2689,6 +2821,15 @@ static int bluetooth_set_radiosw(int radio_on, int update_rfk)
&& radio_on)
return -EPERM;

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul) {
tpacpi_bluetooth_emulstate = !!radio_on;
if (update_rfk)
bluetooth_update_rfk();
return 0;
}
#endif

if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
return -EIO;
if (radio_on)
Expand Down Expand Up @@ -2792,6 +2933,13 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
str_supported(tp_features.bluetooth),
status);

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul) {
tp_features.bluetooth = 1;
printk(TPACPI_INFO
"bluetooth switch emulation enabled\n");
} else
#endif
if (tp_features.bluetooth &&
!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
/* no bluetooth hardware present in system */
Expand Down Expand Up @@ -2890,6 +3038,12 @@ static int wan_get_radiosw(void)
if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
return RFKILL_STATE_HARD_BLOCKED;

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul)
return (tpacpi_wwan_emulstate) ?
RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
#endif

if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
return -EIO;

Expand Down Expand Up @@ -2923,6 +3077,15 @@ static int wan_set_radiosw(int radio_on, int update_rfk)
&& radio_on)
return -EPERM;

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul) {
tpacpi_wwan_emulstate = !!radio_on;
if (update_rfk)
wan_update_rfk();
return 0;
}
#endif

if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
return -EIO;
if (radio_on)
Expand Down Expand Up @@ -3024,6 +3187,13 @@ static int __init wan_init(struct ibm_init_struct *iibm)
str_supported(tp_features.wan),
status);

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul) {
tp_features.wan = 1;
printk(TPACPI_INFO
"wwan switch emulation enabled\n");
} else
#endif
if (tp_features.wan &&
!(status & TP_ACPI_WANCARD_HWPRESENT)) {
/* no wan hardware present in system */
Expand Down Expand Up @@ -6701,6 +6871,26 @@ TPACPI_PARAM(brightness);
TPACPI_PARAM(volume);
TPACPI_PARAM(fan);

#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
module_param(dbg_wlswemul, uint, 0);
MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
MODULE_PARM_DESC(wlsw_state,
"Initial state of the emulated WLSW switch");

module_param(dbg_bluetoothemul, uint, 0);
MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
MODULE_PARM_DESC(bluetooth_state,
"Initial state of the emulated bluetooth switch");

module_param(dbg_wwanemul, uint, 0);
MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
MODULE_PARM_DESC(wwan_state,
"Initial state of the emulated WWAN switch");
#endif

static void thinkpad_acpi_module_exit(void)
{
struct ibm_struct *ibm, *itmp;
Expand Down

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