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Commit a73f3091 authored by Henrique de Moraes Holschuh's avatar Henrique de Moraes Holschuh Committed by Len Brown
Browse files

ACPI: thinkpad-acpi: debug facility to emulate the rf switches 



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: default avatarHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent e0b36fc5

drivers/platform/x86/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -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

drivers/platform/x86/thinkpad_acpi.c

+190 −0
Original line number Diff line number Diff line
@@ -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





/****************************************************************************

 ****************************************************************************

 *
@@ -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,
@@ -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;

}
@@ -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

}



/****************************************************************************
@@ -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;
@@ -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;
@@ -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;
@@ -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)
@@ -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 */
@@ -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;
@@ -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)
@@ -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 */
@@ -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;