OpenCloudOS-Kernel/drivers/hid/hid-wiimote-modules.c

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/*
* Device Modules for Nintendo Wii / Wii U HID Driver
* Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
/*
* Wiimote Modules
* Nintendo devices provide different peripherals and many new devices lack
* initial features like the IR camera. Therefore, each peripheral device is
* implemented as an independent module and we probe on each device only the
* modules for the hardware that really is available.
*
* Module registration is sequential. Unregistration is done in reverse order.
* After device detection, the needed modules are loaded. Users can trigger
* re-detection which causes all modules to be unloaded and then reload the
* modules for the new detected device.
*
* wdata->input is a shared input device. It is always initialized prior to
* module registration. If at least one registered module is marked as
* WIIMOD_FLAG_INPUT, then the input device will get registered after all
* modules were registered.
* Please note that it is unregistered _before_ the "remove" callbacks are
* called. This guarantees that no input interaction is done, anymore. However,
* the wiimote core keeps a reference to the input device so it is freed only
* after all modules were removed. It is safe to send events to unregistered
* input devices.
*/
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/spinlock.h>
#include "hid-wiimote.h"
/*
* Keys
* The initial Wii Remote provided a bunch of buttons that are reported as
* part of the core protocol. Many later devices dropped these and report
* invalid data in the core button reports. Load this only on devices which
* correctly send button reports.
* It uses the shared input device.
*/
static const __u16 wiimod_keys_map[] = {
KEY_LEFT, /* WIIPROTO_KEY_LEFT */
KEY_RIGHT, /* WIIPROTO_KEY_RIGHT */
KEY_UP, /* WIIPROTO_KEY_UP */
KEY_DOWN, /* WIIPROTO_KEY_DOWN */
KEY_NEXT, /* WIIPROTO_KEY_PLUS */
KEY_PREVIOUS, /* WIIPROTO_KEY_MINUS */
BTN_1, /* WIIPROTO_KEY_ONE */
BTN_2, /* WIIPROTO_KEY_TWO */
BTN_A, /* WIIPROTO_KEY_A */
BTN_B, /* WIIPROTO_KEY_B */
BTN_MODE, /* WIIPROTO_KEY_HOME */
};
static void wiimod_keys_in_keys(struct wiimote_data *wdata, const __u8 *keys)
{
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_LEFT],
!!(keys[0] & 0x01));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_RIGHT],
!!(keys[0] & 0x02));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_DOWN],
!!(keys[0] & 0x04));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_UP],
!!(keys[0] & 0x08));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_PLUS],
!!(keys[0] & 0x10));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_TWO],
!!(keys[1] & 0x01));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_ONE],
!!(keys[1] & 0x02));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_B],
!!(keys[1] & 0x04));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_A],
!!(keys[1] & 0x08));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_MINUS],
!!(keys[1] & 0x10));
input_report_key(wdata->input, wiimod_keys_map[WIIPROTO_KEY_HOME],
!!(keys[1] & 0x80));
input_sync(wdata->input);
}
static int wiimod_keys_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
unsigned int i;
set_bit(EV_KEY, wdata->input->evbit);
for (i = 0; i < WIIPROTO_KEY_COUNT; ++i)
set_bit(wiimod_keys_map[i], wdata->input->keybit);
return 0;
}
static const struct wiimod_ops wiimod_keys = {
.flags = WIIMOD_FLAG_INPUT,
.arg = 0,
.probe = wiimod_keys_probe,
.remove = NULL,
.in_keys = wiimod_keys_in_keys,
};
/*
* Rumble
* Nearly all devices provide a rumble feature. A small motor for
* force-feedback effects. We provide an FF_RUMBLE memless ff device on the
* shared input device if this module is loaded.
* The rumble motor is controlled via a flag on almost every output report so
* the wiimote core handles the rumble flag. But if a device doesn't provide
* the rumble motor, this flag shouldn't be set.
*/
/* used by wiimod_rumble and wiipro_rumble */
static void wiimod_rumble_worker(struct work_struct *work)
{
struct wiimote_data *wdata = container_of(work, struct wiimote_data,
rumble_worker);
spin_lock_irq(&wdata->state.lock);
wiiproto_req_rumble(wdata, wdata->state.cache_rumble);
spin_unlock_irq(&wdata->state.lock);
}
static int wiimod_rumble_play(struct input_dev *dev, void *data,
struct ff_effect *eff)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
__u8 value;
/*
* The wiimote supports only a single rumble motor so if any magnitude
* is set to non-zero then we start the rumble motor. If both are set to
* zero, we stop the rumble motor.
*/
if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
value = 1;
else
value = 0;
/* Locking state.lock here might deadlock with input_event() calls.
* schedule_work acts as barrier. Merging multiple changes is fine. */
wdata->state.cache_rumble = value;
schedule_work(&wdata->rumble_worker);
return 0;
}
static int wiimod_rumble_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
INIT_WORK(&wdata->rumble_worker, wiimod_rumble_worker);
set_bit(FF_RUMBLE, wdata->input->ffbit);
if (input_ff_create_memless(wdata->input, NULL, wiimod_rumble_play))
return -ENOMEM;
return 0;
}
static void wiimod_rumble_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
unsigned long flags;
cancel_work_sync(&wdata->rumble_worker);
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_rumble(wdata, 0);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static const struct wiimod_ops wiimod_rumble = {
.flags = WIIMOD_FLAG_INPUT,
.arg = 0,
.probe = wiimod_rumble_probe,
.remove = wiimod_rumble_remove,
};
/*
* Battery
* 1 byte of battery capacity information is sent along every protocol status
* report. The wiimote core caches it but we try to update it on every
* user-space request.
* This is supported by nearly every device so it's almost always enabled.
*/
static enum power_supply_property wiimod_battery_props[] = {
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_SCOPE,
};
static int wiimod_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
struct wiimote_data *wdata = power_supply_get_drvdata(psy);
int ret = 0, state;
unsigned long flags;
if (psp == POWER_SUPPLY_PROP_SCOPE) {
val->intval = POWER_SUPPLY_SCOPE_DEVICE;
return 0;
} else if (psp != POWER_SUPPLY_PROP_CAPACITY) {
return -EINVAL;
}
ret = wiimote_cmd_acquire(wdata);
if (ret)
return ret;
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
wiiproto_req_status(wdata);
spin_unlock_irqrestore(&wdata->state.lock, flags);
wiimote_cmd_wait(wdata);
wiimote_cmd_release(wdata);
spin_lock_irqsave(&wdata->state.lock, flags);
state = wdata->state.cmd_battery;
spin_unlock_irqrestore(&wdata->state.lock, flags);
val->intval = state * 100 / 255;
return ret;
}
static int wiimod_battery_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
struct power_supply_config psy_cfg = { .drv_data = wdata, };
int ret;
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
wdata->battery_desc.properties = wiimod_battery_props;
wdata->battery_desc.num_properties = ARRAY_SIZE(wiimod_battery_props);
wdata->battery_desc.get_property = wiimod_battery_get_property;
wdata->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
wdata->battery_desc.use_for_apm = 0;
wdata->battery_desc.name = kasprintf(GFP_KERNEL, "wiimote_battery_%s",
wdata->hdev->uniq);
if (!wdata->battery_desc.name)
return -ENOMEM;
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
wdata->battery = power_supply_register(&wdata->hdev->dev,
&wdata->battery_desc,
&psy_cfg);
if (IS_ERR(wdata->battery)) {
hid_err(wdata->hdev, "cannot register battery device\n");
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
ret = PTR_ERR(wdata->battery);
goto err_free;
}
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
power_supply_powers(wdata->battery, &wdata->hdev->dev);
return 0;
err_free:
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
kfree(wdata->battery_desc.name);
wdata->battery_desc.name = NULL;
return ret;
}
static void wiimod_battery_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
if (!wdata->battery_desc.name)
return;
power_supply: Change ownership from driver to core Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-12 15:44:11 +08:00
power_supply_unregister(wdata->battery);
kfree(wdata->battery_desc.name);
wdata->battery_desc.name = NULL;
}
static const struct wiimod_ops wiimod_battery = {
.flags = 0,
.arg = 0,
.probe = wiimod_battery_probe,
.remove = wiimod_battery_remove,
};
/*
* LED
* 0 to 4 player LEDs are supported by devices. The "arg" field of the
* wiimod_ops structure specifies which LED this module controls. This allows
* to register a limited number of LEDs.
* State is managed by wiimote core.
*/
static enum led_brightness wiimod_led_get(struct led_classdev *led_dev)
{
struct device *dev = led_dev->dev->parent;
struct wiimote_data *wdata = dev_to_wii(dev);
int i;
unsigned long flags;
bool value = false;
for (i = 0; i < 4; ++i) {
if (wdata->leds[i] == led_dev) {
spin_lock_irqsave(&wdata->state.lock, flags);
value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
spin_unlock_irqrestore(&wdata->state.lock, flags);
break;
}
}
return value ? LED_FULL : LED_OFF;
}
static void wiimod_led_set(struct led_classdev *led_dev,
enum led_brightness value)
{
struct device *dev = led_dev->dev->parent;
struct wiimote_data *wdata = dev_to_wii(dev);
int i;
unsigned long flags;
__u8 state, flag;
for (i = 0; i < 4; ++i) {
if (wdata->leds[i] == led_dev) {
flag = WIIPROTO_FLAG_LED(i + 1);
spin_lock_irqsave(&wdata->state.lock, flags);
state = wdata->state.flags;
if (value == LED_OFF)
wiiproto_req_leds(wdata, state & ~flag);
else
wiiproto_req_leds(wdata, state | flag);
spin_unlock_irqrestore(&wdata->state.lock, flags);
break;
}
}
}
static int wiimod_led_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
struct device *dev = &wdata->hdev->dev;
size_t namesz = strlen(dev_name(dev)) + 9;
struct led_classdev *led;
unsigned long flags;
char *name;
int ret;
led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL);
if (!led)
return -ENOMEM;
name = (void*)&led[1];
snprintf(name, namesz, "%s:blue:p%lu", dev_name(dev), ops->arg);
led->name = name;
led->brightness = 0;
led->max_brightness = 1;
led->brightness_get = wiimod_led_get;
led->brightness_set = wiimod_led_set;
wdata->leds[ops->arg] = led;
ret = led_classdev_register(dev, led);
if (ret)
goto err_free;
/* enable LED1 to stop initial LED-blinking */
if (ops->arg == 0) {
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
return 0;
err_free:
wdata->leds[ops->arg] = NULL;
kfree(led);
return ret;
}
static void wiimod_led_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
if (!wdata->leds[ops->arg])
return;
led_classdev_unregister(wdata->leds[ops->arg]);
kfree(wdata->leds[ops->arg]);
wdata->leds[ops->arg] = NULL;
}
static const struct wiimod_ops wiimod_leds[4] = {
{
.flags = 0,
.arg = 0,
.probe = wiimod_led_probe,
.remove = wiimod_led_remove,
},
{
.flags = 0,
.arg = 1,
.probe = wiimod_led_probe,
.remove = wiimod_led_remove,
},
{
.flags = 0,
.arg = 2,
.probe = wiimod_led_probe,
.remove = wiimod_led_remove,
},
{
.flags = 0,
.arg = 3,
.probe = wiimod_led_probe,
.remove = wiimod_led_remove,
},
};
/*
* Accelerometer
* 3 axis accelerometer data is part of nearly all DRMs. If not supported by a
* device, it's mostly cleared to 0. This module parses this data and provides
* it via a separate input device.
*/
static void wiimod_accel_in_accel(struct wiimote_data *wdata,
const __u8 *accel)
{
__u16 x, y, z;
if (!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
return;
/*
* payload is: BB BB XX YY ZZ
* Accelerometer data is encoded into 3 10bit values. XX, YY and ZZ
* contain the upper 8 bits of each value. The lower 2 bits are
* contained in the buttons data BB BB.
* Bits 6 and 7 of the first buttons byte BB is the lower 2 bits of the
* X accel value. Bit 5 of the second buttons byte is the 2nd bit of Y
* accel value and bit 6 is the second bit of the Z value.
* The first bit of Y and Z values is not available and always set to 0.
* 0x200 is returned on no movement.
*/
x = accel[2] << 2;
y = accel[3] << 2;
z = accel[4] << 2;
x |= (accel[0] >> 5) & 0x3;
y |= (accel[1] >> 4) & 0x2;
z |= (accel[1] >> 5) & 0x2;
input_report_abs(wdata->accel, ABS_RX, x - 0x200);
input_report_abs(wdata->accel, ABS_RY, y - 0x200);
input_report_abs(wdata->accel, ABS_RZ, z - 0x200);
input_sync(wdata->accel);
}
static int wiimod_accel_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_accel(wdata, true);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_accel_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_accel(wdata, false);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static int wiimod_accel_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
int ret;
wdata->accel = input_allocate_device();
if (!wdata->accel)
return -ENOMEM;
input_set_drvdata(wdata->accel, wdata);
wdata->accel->open = wiimod_accel_open;
wdata->accel->close = wiimod_accel_close;
wdata->accel->dev.parent = &wdata->hdev->dev;
wdata->accel->id.bustype = wdata->hdev->bus;
wdata->accel->id.vendor = wdata->hdev->vendor;
wdata->accel->id.product = wdata->hdev->product;
wdata->accel->id.version = wdata->hdev->version;
wdata->accel->name = WIIMOTE_NAME " Accelerometer";
set_bit(EV_ABS, wdata->accel->evbit);
set_bit(ABS_RX, wdata->accel->absbit);
set_bit(ABS_RY, wdata->accel->absbit);
set_bit(ABS_RZ, wdata->accel->absbit);
input_set_abs_params(wdata->accel, ABS_RX, -500, 500, 2, 4);
input_set_abs_params(wdata->accel, ABS_RY, -500, 500, 2, 4);
input_set_abs_params(wdata->accel, ABS_RZ, -500, 500, 2, 4);
ret = input_register_device(wdata->accel);
if (ret) {
hid_err(wdata->hdev, "cannot register input device\n");
goto err_free;
}
return 0;
err_free:
input_free_device(wdata->accel);
wdata->accel = NULL;
return ret;
}
static void wiimod_accel_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
if (!wdata->accel)
return;
input_unregister_device(wdata->accel);
wdata->accel = NULL;
}
static const struct wiimod_ops wiimod_accel = {
.flags = 0,
.arg = 0,
.probe = wiimod_accel_probe,
.remove = wiimod_accel_remove,
.in_accel = wiimod_accel_in_accel,
};
/*
* IR Cam
* Up to 4 IR sources can be tracked by a normal Wii Remote. The IR cam needs
* to be initialized with a fairly complex procedure and consumes a lot of
* power. Therefore, as long as no application uses the IR input device, it is
* kept offline.
* Nearly no other device than the normal Wii Remotes supports the IR cam so
* you can disable this module for these devices.
*/
static void wiimod_ir_in_ir(struct wiimote_data *wdata, const __u8 *ir,
bool packed, unsigned int id)
{
__u16 x, y;
__u8 xid, yid;
bool sync = false;
if (!(wdata->state.flags & WIIPROTO_FLAGS_IR))
return;
switch (id) {
case 0:
xid = ABS_HAT0X;
yid = ABS_HAT0Y;
break;
case 1:
xid = ABS_HAT1X;
yid = ABS_HAT1Y;
break;
case 2:
xid = ABS_HAT2X;
yid = ABS_HAT2Y;
break;
case 3:
xid = ABS_HAT3X;
yid = ABS_HAT3Y;
sync = true;
break;
default:
return;
}
/*
* Basic IR data is encoded into 3 bytes. The first two bytes are the
* lower 8 bit of the X/Y data, the 3rd byte contains the upper 2 bits
* of both.
* If data is packed, then the 3rd byte is put first and slightly
* reordered. This allows to interleave packed and non-packed data to
* have two IR sets in 5 bytes instead of 6.
* The resulting 10bit X/Y values are passed to the ABS_HAT? input dev.
*/
if (packed) {
x = ir[1] | ((ir[0] & 0x03) << 8);
y = ir[2] | ((ir[0] & 0x0c) << 6);
} else {
x = ir[0] | ((ir[2] & 0x30) << 4);
y = ir[1] | ((ir[2] & 0xc0) << 2);
}
input_report_abs(wdata->ir, xid, x);
input_report_abs(wdata->ir, yid, y);
if (sync)
input_sync(wdata->ir);
}
static int wiimod_ir_change(struct wiimote_data *wdata, __u16 mode)
{
int ret;
unsigned long flags;
__u8 format = 0;
static const __u8 data_enable[] = { 0x01 };
static const __u8 data_sens1[] = { 0x02, 0x00, 0x00, 0x71, 0x01,
0x00, 0xaa, 0x00, 0x64 };
static const __u8 data_sens2[] = { 0x63, 0x03 };
static const __u8 data_fin[] = { 0x08 };
spin_lock_irqsave(&wdata->state.lock, flags);
if (mode == (wdata->state.flags & WIIPROTO_FLAGS_IR)) {
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
if (mode == 0) {
wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
wiiproto_req_ir1(wdata, 0);
wiiproto_req_ir2(wdata, 0);
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_acquire(wdata);
if (ret)
return ret;
/* send PIXEL CLOCK ENABLE cmd first */
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_set(wdata, WIIPROTO_REQ_IR1, 0);
wiiproto_req_ir1(wdata, 0x06);
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_wait(wdata);
if (ret)
goto unlock;
if (wdata->state.cmd_err) {
ret = -EIO;
goto unlock;
}
/* enable IR LOGIC */
spin_lock_irqsave(&wdata->state.lock, flags);
wiimote_cmd_set(wdata, WIIPROTO_REQ_IR2, 0);
wiiproto_req_ir2(wdata, 0x06);
spin_unlock_irqrestore(&wdata->state.lock, flags);
ret = wiimote_cmd_wait(wdata);
if (ret)
goto unlock;
if (wdata->state.cmd_err) {
ret = -EIO;
goto unlock;
}
/* enable IR cam but do not make it send data, yet */
ret = wiimote_cmd_write(wdata, 0xb00030, data_enable,
sizeof(data_enable));
if (ret)
goto unlock;
/* write first sensitivity block */
ret = wiimote_cmd_write(wdata, 0xb00000, data_sens1,
sizeof(data_sens1));
if (ret)
goto unlock;
/* write second sensitivity block */
ret = wiimote_cmd_write(wdata, 0xb0001a, data_sens2,
sizeof(data_sens2));
if (ret)
goto unlock;
/* put IR cam into desired state */
switch (mode) {
case WIIPROTO_FLAG_IR_FULL:
format = 5;
break;
case WIIPROTO_FLAG_IR_EXT:
format = 3;
break;
case WIIPROTO_FLAG_IR_BASIC:
format = 1;
break;
}
ret = wiimote_cmd_write(wdata, 0xb00033, &format, sizeof(format));
if (ret)
goto unlock;
/* make IR cam send data */
ret = wiimote_cmd_write(wdata, 0xb00030, data_fin, sizeof(data_fin));
if (ret)
goto unlock;
/* request new DRM mode compatible to IR mode */
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
wdata->state.flags |= mode & WIIPROTO_FLAGS_IR;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
unlock:
wiimote_cmd_release(wdata);
return ret;
}
static int wiimod_ir_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
return wiimod_ir_change(wdata, WIIPROTO_FLAG_IR_BASIC);
}
static void wiimod_ir_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
wiimod_ir_change(wdata, 0);
}
static int wiimod_ir_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
int ret;
wdata->ir = input_allocate_device();
if (!wdata->ir)
return -ENOMEM;
input_set_drvdata(wdata->ir, wdata);
wdata->ir->open = wiimod_ir_open;
wdata->ir->close = wiimod_ir_close;
wdata->ir->dev.parent = &wdata->hdev->dev;
wdata->ir->id.bustype = wdata->hdev->bus;
wdata->ir->id.vendor = wdata->hdev->vendor;
wdata->ir->id.product = wdata->hdev->product;
wdata->ir->id.version = wdata->hdev->version;
wdata->ir->name = WIIMOTE_NAME " IR";
set_bit(EV_ABS, wdata->ir->evbit);
set_bit(ABS_HAT0X, wdata->ir->absbit);
set_bit(ABS_HAT0Y, wdata->ir->absbit);
set_bit(ABS_HAT1X, wdata->ir->absbit);
set_bit(ABS_HAT1Y, wdata->ir->absbit);
set_bit(ABS_HAT2X, wdata->ir->absbit);
set_bit(ABS_HAT2Y, wdata->ir->absbit);
set_bit(ABS_HAT3X, wdata->ir->absbit);
set_bit(ABS_HAT3Y, wdata->ir->absbit);
input_set_abs_params(wdata->ir, ABS_HAT0X, 0, 1023, 2, 4);
input_set_abs_params(wdata->ir, ABS_HAT0Y, 0, 767, 2, 4);
input_set_abs_params(wdata->ir, ABS_HAT1X, 0, 1023, 2, 4);
input_set_abs_params(wdata->ir, ABS_HAT1Y, 0, 767, 2, 4);
input_set_abs_params(wdata->ir, ABS_HAT2X, 0, 1023, 2, 4);
input_set_abs_params(wdata->ir, ABS_HAT2Y, 0, 767, 2, 4);
input_set_abs_params(wdata->ir, ABS_HAT3X, 0, 1023, 2, 4);
input_set_abs_params(wdata->ir, ABS_HAT3Y, 0, 767, 2, 4);
ret = input_register_device(wdata->ir);
if (ret) {
hid_err(wdata->hdev, "cannot register input device\n");
goto err_free;
}
return 0;
err_free:
input_free_device(wdata->ir);
wdata->ir = NULL;
return ret;
}
static void wiimod_ir_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
if (!wdata->ir)
return;
input_unregister_device(wdata->ir);
wdata->ir = NULL;
}
static const struct wiimod_ops wiimod_ir = {
.flags = 0,
.arg = 0,
.probe = wiimod_ir_probe,
.remove = wiimod_ir_remove,
.in_ir = wiimod_ir_in_ir,
};
/*
* Nunchuk Extension
* The Nintendo Wii Nunchuk was the first official extension published by
* Nintendo. It provides two additional keys and a separate accelerometer. It
* can be hotplugged to standard Wii Remotes.
*/
enum wiimod_nunchuk_keys {
WIIMOD_NUNCHUK_KEY_C,
WIIMOD_NUNCHUK_KEY_Z,
WIIMOD_NUNCHUK_KEY_NUM,
};
static const __u16 wiimod_nunchuk_map[] = {
BTN_C, /* WIIMOD_NUNCHUK_KEY_C */
BTN_Z, /* WIIMOD_NUNCHUK_KEY_Z */
};
static void wiimod_nunchuk_in_ext(struct wiimote_data *wdata, const __u8 *ext)
{
__s16 x, y, z, bx, by;
/* Byte | 8 7 | 6 5 | 4 3 | 2 | 1 |
* -----+----------+---------+---------+----+-----+
* 1 | Button X <7:0> |
* 2 | Button Y <7:0> |
* -----+----------+---------+---------+----+-----+
* 3 | Speed X <9:2> |
* 4 | Speed Y <9:2> |
* 5 | Speed Z <9:2> |
* -----+----------+---------+---------+----+-----+
* 6 | Z <1:0> | Y <1:0> | X <1:0> | BC | BZ |
* -----+----------+---------+---------+----+-----+
* Button X/Y is the analog stick. Speed X, Y and Z are the
* accelerometer data in the same format as the wiimote's accelerometer.
* The 6th byte contains the LSBs of the accelerometer data.
* BC and BZ are the C and Z buttons: 0 means pressed
*
* If reported interleaved with motionp, then the layout changes. The
* 5th and 6th byte changes to:
* -----+-----------------------------------+-----+
* 5 | Speed Z <9:3> | EXT |
* -----+--------+-----+-----+----+----+----+-----+
* 6 |Z <2:1> |Y <1>|X <1>| BC | BZ | 0 | 0 |
* -----+--------+-----+-----+----+----+----+-----+
* All three accelerometer values lose their LSB. The other data is
* still available but slightly moved.
*
* Center data for button values is 128. Center value for accelerometer
* values it 512 / 0x200
*/
bx = ext[0];
by = ext[1];
bx -= 128;
by -= 128;
x = ext[2] << 2;
y = ext[3] << 2;
z = ext[4] << 2;
if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
x |= (ext[5] >> 3) & 0x02;
y |= (ext[5] >> 4) & 0x02;
z &= ~0x4;
z |= (ext[5] >> 5) & 0x06;
} else {
x |= (ext[5] >> 2) & 0x03;
y |= (ext[5] >> 4) & 0x03;
z |= (ext[5] >> 6) & 0x03;
}
x -= 0x200;
y -= 0x200;
z -= 0x200;
input_report_abs(wdata->extension.input, ABS_HAT0X, bx);
input_report_abs(wdata->extension.input, ABS_HAT0Y, by);
input_report_abs(wdata->extension.input, ABS_RX, x);
input_report_abs(wdata->extension.input, ABS_RY, y);
input_report_abs(wdata->extension.input, ABS_RZ, z);
if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
input_report_key(wdata->extension.input,
wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_Z],
!(ext[5] & 0x04));
input_report_key(wdata->extension.input,
wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_C],
!(ext[5] & 0x08));
} else {
input_report_key(wdata->extension.input,
wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_Z],
!(ext[5] & 0x01));
input_report_key(wdata->extension.input,
wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_C],
!(ext[5] & 0x02));
}
input_sync(wdata->extension.input);
}
static int wiimod_nunchuk_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_nunchuk_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static int wiimod_nunchuk_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
int ret, i;
wdata->extension.input = input_allocate_device();
if (!wdata->extension.input)
return -ENOMEM;
input_set_drvdata(wdata->extension.input, wdata);
wdata->extension.input->open = wiimod_nunchuk_open;
wdata->extension.input->close = wiimod_nunchuk_close;
wdata->extension.input->dev.parent = &wdata->hdev->dev;
wdata->extension.input->id.bustype = wdata->hdev->bus;
wdata->extension.input->id.vendor = wdata->hdev->vendor;
wdata->extension.input->id.product = wdata->hdev->product;
wdata->extension.input->id.version = wdata->hdev->version;
wdata->extension.input->name = WIIMOTE_NAME " Nunchuk";
set_bit(EV_KEY, wdata->extension.input->evbit);
for (i = 0; i < WIIMOD_NUNCHUK_KEY_NUM; ++i)
set_bit(wiimod_nunchuk_map[i],
wdata->extension.input->keybit);
set_bit(EV_ABS, wdata->extension.input->evbit);
set_bit(ABS_HAT0X, wdata->extension.input->absbit);
set_bit(ABS_HAT0Y, wdata->extension.input->absbit);
input_set_abs_params(wdata->extension.input,
ABS_HAT0X, -120, 120, 2, 4);
input_set_abs_params(wdata->extension.input,
ABS_HAT0Y, -120, 120, 2, 4);
set_bit(ABS_RX, wdata->extension.input->absbit);
set_bit(ABS_RY, wdata->extension.input->absbit);
set_bit(ABS_RZ, wdata->extension.input->absbit);
input_set_abs_params(wdata->extension.input,
ABS_RX, -500, 500, 2, 4);
input_set_abs_params(wdata->extension.input,
ABS_RY, -500, 500, 2, 4);
input_set_abs_params(wdata->extension.input,
ABS_RZ, -500, 500, 2, 4);
ret = input_register_device(wdata->extension.input);
if (ret)
goto err_free;
return 0;
err_free:
input_free_device(wdata->extension.input);
wdata->extension.input = NULL;
return ret;
}
static void wiimod_nunchuk_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
if (!wdata->extension.input)
return;
input_unregister_device(wdata->extension.input);
wdata->extension.input = NULL;
}
static const struct wiimod_ops wiimod_nunchuk = {
.flags = 0,
.arg = 0,
.probe = wiimod_nunchuk_probe,
.remove = wiimod_nunchuk_remove,
.in_ext = wiimod_nunchuk_in_ext,
};
/*
* Classic Controller
* Another official extension from Nintendo. It provides a classic
* gamecube-like controller that can be hotplugged on the Wii Remote.
* It has several hardware buttons and switches that are all reported via
* a normal extension device.
*/
enum wiimod_classic_keys {
WIIMOD_CLASSIC_KEY_A,
WIIMOD_CLASSIC_KEY_B,
WIIMOD_CLASSIC_KEY_X,
WIIMOD_CLASSIC_KEY_Y,
WIIMOD_CLASSIC_KEY_ZL,
WIIMOD_CLASSIC_KEY_ZR,
WIIMOD_CLASSIC_KEY_PLUS,
WIIMOD_CLASSIC_KEY_MINUS,
WIIMOD_CLASSIC_KEY_HOME,
WIIMOD_CLASSIC_KEY_LEFT,
WIIMOD_CLASSIC_KEY_RIGHT,
WIIMOD_CLASSIC_KEY_UP,
WIIMOD_CLASSIC_KEY_DOWN,
WIIMOD_CLASSIC_KEY_LT,
WIIMOD_CLASSIC_KEY_RT,
WIIMOD_CLASSIC_KEY_NUM,
};
static const __u16 wiimod_classic_map[] = {
BTN_A, /* WIIMOD_CLASSIC_KEY_A */
BTN_B, /* WIIMOD_CLASSIC_KEY_B */
BTN_X, /* WIIMOD_CLASSIC_KEY_X */
BTN_Y, /* WIIMOD_CLASSIC_KEY_Y */
BTN_TL2, /* WIIMOD_CLASSIC_KEY_ZL */
BTN_TR2, /* WIIMOD_CLASSIC_KEY_ZR */
KEY_NEXT, /* WIIMOD_CLASSIC_KEY_PLUS */
KEY_PREVIOUS, /* WIIMOD_CLASSIC_KEY_MINUS */
BTN_MODE, /* WIIMOD_CLASSIC_KEY_HOME */
KEY_LEFT, /* WIIMOD_CLASSIC_KEY_LEFT */
KEY_RIGHT, /* WIIMOD_CLASSIC_KEY_RIGHT */
KEY_UP, /* WIIMOD_CLASSIC_KEY_UP */
KEY_DOWN, /* WIIMOD_CLASSIC_KEY_DOWN */
BTN_TL, /* WIIMOD_CLASSIC_KEY_LT */
BTN_TR, /* WIIMOD_CLASSIC_KEY_RT */
};
static void wiimod_classic_in_ext(struct wiimote_data *wdata, const __u8 *ext)
{
__s8 rx, ry, lx, ly, lt, rt;
/* Byte | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 1 | RX <5:4> | LX <5:0> |
* 2 | RX <3:2> | LY <5:0> |
* -----+-----+-----+-----+-----------------------------+
* 3 |RX<1>| LT <5:4> | RY <5:1> |
* -----+-----+-----------+-----------------------------+
* 4 | LT <3:1> | RT <5:1> |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 5 | BDR | BDD | BLT | B- | BH | B+ | BRT | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 6 | BZL | BB | BY | BA | BX | BZR | BDL | BDU |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* All buttons are 0 if pressed
* RX and RY are right analog stick
* LX and LY are left analog stick
* LT is left trigger, RT is right trigger
* BLT is 0 if left trigger is fully pressed
* BRT is 0 if right trigger is fully pressed
* BDR, BDD, BDL, BDU form the D-Pad with right, down, left, up buttons
* BZL is left Z button and BZR is right Z button
* B-, BH, B+ are +, HOME and - buttons
* BB, BY, BA, BX are A, B, X, Y buttons
* LSB of RX, RY, LT, and RT are not transmitted and always 0.
*
* With motionp enabled it changes slightly to this:
* Byte | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 1 | RX <5:4> | LX <5:1> | BDU |
* 2 | RX <3:2> | LY <5:1> | BDL |
* -----+-----+-----+-----+-----------------------+-----+
* 3 |RX<1>| LT <5:4> | RY <5:1> |
* -----+-----+-----------+-----------------------------+
* 4 | LT <3:1> | RT <5:1> |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 5 | BDR | BDD | BLT | B- | BH | B+ | BRT | EXT |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 6 | BZL | BB | BY | BA | BX | BZR | 0 | 0 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* Only the LSBs of LX and LY are lost. BDU and BDL are moved, the rest
* is the same as before.
*/
if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
lx = ext[0] & 0x3e;
ly = ext[1] & 0x3e;
} else {
lx = ext[0] & 0x3f;
ly = ext[1] & 0x3f;
}
rx = (ext[0] >> 3) & 0x18;
rx |= (ext[1] >> 5) & 0x06;
rx |= (ext[2] >> 7) & 0x01;
ry = ext[2] & 0x1f;
rt = ext[3] & 0x1f;
lt = (ext[2] >> 2) & 0x18;
lt |= (ext[3] >> 5) & 0x07;
rx <<= 1;
ry <<= 1;
rt <<= 1;
lt <<= 1;
input_report_abs(wdata->extension.input, ABS_HAT1X, lx - 0x20);
input_report_abs(wdata->extension.input, ABS_HAT1Y, ly - 0x20);
input_report_abs(wdata->extension.input, ABS_HAT2X, rx - 0x20);
input_report_abs(wdata->extension.input, ABS_HAT2Y, ry - 0x20);
input_report_abs(wdata->extension.input, ABS_HAT3X, rt);
input_report_abs(wdata->extension.input, ABS_HAT3Y, lt);
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_RIGHT],
!(ext[4] & 0x80));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_DOWN],
!(ext[4] & 0x40));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_LT],
!(ext[4] & 0x20));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_MINUS],
!(ext[4] & 0x10));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_HOME],
!(ext[4] & 0x08));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_PLUS],
!(ext[4] & 0x04));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_RT],
!(ext[4] & 0x02));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_ZL],
!(ext[5] & 0x80));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_B],
!(ext[5] & 0x40));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_Y],
!(ext[5] & 0x20));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_A],
!(ext[5] & 0x10));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_X],
!(ext[5] & 0x08));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_ZR],
!(ext[5] & 0x04));
if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_LEFT],
!(ext[1] & 0x01));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_UP],
!(ext[0] & 0x01));
} else {
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_LEFT],
!(ext[5] & 0x02));
input_report_key(wdata->extension.input,
wiimod_classic_map[WIIMOD_CLASSIC_KEY_UP],
!(ext[5] & 0x01));
}
input_sync(wdata->extension.input);
}
static int wiimod_classic_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_classic_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static int wiimod_classic_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
int ret, i;
wdata->extension.input = input_allocate_device();
if (!wdata->extension.input)
return -ENOMEM;
input_set_drvdata(wdata->extension.input, wdata);
wdata->extension.input->open = wiimod_classic_open;
wdata->extension.input->close = wiimod_classic_close;
wdata->extension.input->dev.parent = &wdata->hdev->dev;
wdata->extension.input->id.bustype = wdata->hdev->bus;
wdata->extension.input->id.vendor = wdata->hdev->vendor;
wdata->extension.input->id.product = wdata->hdev->product;
wdata->extension.input->id.version = wdata->hdev->version;
wdata->extension.input->name = WIIMOTE_NAME " Classic Controller";
set_bit(EV_KEY, wdata->extension.input->evbit);
for (i = 0; i < WIIMOD_CLASSIC_KEY_NUM; ++i)
set_bit(wiimod_classic_map[i],
wdata->extension.input->keybit);
set_bit(EV_ABS, wdata->extension.input->evbit);
set_bit(ABS_HAT1X, wdata->extension.input->absbit);
set_bit(ABS_HAT1Y, wdata->extension.input->absbit);
set_bit(ABS_HAT2X, wdata->extension.input->absbit);
set_bit(ABS_HAT2Y, wdata->extension.input->absbit);
set_bit(ABS_HAT3X, wdata->extension.input->absbit);
set_bit(ABS_HAT3Y, wdata->extension.input->absbit);
input_set_abs_params(wdata->extension.input,
ABS_HAT1X, -30, 30, 1, 1);
input_set_abs_params(wdata->extension.input,
ABS_HAT1Y, -30, 30, 1, 1);
input_set_abs_params(wdata->extension.input,
ABS_HAT2X, -30, 30, 1, 1);
input_set_abs_params(wdata->extension.input,
ABS_HAT2Y, -30, 30, 1, 1);
input_set_abs_params(wdata->extension.input,
ABS_HAT3X, -30, 30, 1, 1);
input_set_abs_params(wdata->extension.input,
ABS_HAT3Y, -30, 30, 1, 1);
ret = input_register_device(wdata->extension.input);
if (ret)
goto err_free;
return 0;
err_free:
input_free_device(wdata->extension.input);
wdata->extension.input = NULL;
return ret;
}
static void wiimod_classic_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
if (!wdata->extension.input)
return;
input_unregister_device(wdata->extension.input);
wdata->extension.input = NULL;
}
static const struct wiimod_ops wiimod_classic = {
.flags = 0,
.arg = 0,
.probe = wiimod_classic_probe,
.remove = wiimod_classic_remove,
.in_ext = wiimod_classic_in_ext,
};
/*
* Balance Board Extension
* The Nintendo Wii Balance Board provides four hardware weight sensor plus a
* single push button. No other peripherals are available. However, the
* balance-board data is sent via a standard Wii Remote extension. All other
* data for non-present hardware is zeroed out.
* Some 3rd party devices react allergic if we try to access normal Wii Remote
* hardware, so this extension module should be the only module that is loaded
* on balance boards.
* The balance board needs 8 bytes extension data instead of basic 6 bytes so
* it needs the WIIMOD_FLAG_EXT8 flag.
*/
static void wiimod_bboard_in_keys(struct wiimote_data *wdata, const __u8 *keys)
{
input_report_key(wdata->extension.input, BTN_A,
!!(keys[1] & 0x08));
input_sync(wdata->extension.input);
}
static void wiimod_bboard_in_ext(struct wiimote_data *wdata,
const __u8 *ext)
{
__s32 val[4], tmp, div;
unsigned int i;
struct wiimote_state *s = &wdata->state;
/*
* Balance board data layout:
*
* Byte | 8 7 6 5 4 3 2 1 |
* -----+--------------------------+
* 1 | Top Right <15:8> |
* 2 | Top Right <7:0> |
* -----+--------------------------+
* 3 | Bottom Right <15:8> |
* 4 | Bottom Right <7:0> |
* -----+--------------------------+
* 5 | Top Left <15:8> |
* 6 | Top Left <7:0> |
* -----+--------------------------+
* 7 | Bottom Left <15:8> |
* 8 | Bottom Left <7:0> |
* -----+--------------------------+
*
* These values represent the weight-measurements of the Wii-balance
* board with 16bit precision.
*
* The balance-board is never reported interleaved with motionp.
*/
val[0] = ext[0];
val[0] <<= 8;
val[0] |= ext[1];
val[1] = ext[2];
val[1] <<= 8;
val[1] |= ext[3];
val[2] = ext[4];
val[2] <<= 8;
val[2] |= ext[5];
val[3] = ext[6];
val[3] <<= 8;
val[3] |= ext[7];
/* apply calibration data */
for (i = 0; i < 4; i++) {
if (val[i] <= s->calib_bboard[i][0]) {
tmp = 0;
} else if (val[i] < s->calib_bboard[i][1]) {
tmp = val[i] - s->calib_bboard[i][0];
tmp *= 1700;
div = s->calib_bboard[i][1] - s->calib_bboard[i][0];
tmp /= div ? div : 1;
} else {
tmp = val[i] - s->calib_bboard[i][1];
tmp *= 1700;
div = s->calib_bboard[i][2] - s->calib_bboard[i][1];
tmp /= div ? div : 1;
tmp += 1700;
}
val[i] = tmp;
}
input_report_abs(wdata->extension.input, ABS_HAT0X, val[0]);
input_report_abs(wdata->extension.input, ABS_HAT0Y, val[1]);
input_report_abs(wdata->extension.input, ABS_HAT1X, val[2]);
input_report_abs(wdata->extension.input, ABS_HAT1Y, val[3]);
input_sync(wdata->extension.input);
}
static int wiimod_bboard_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_bboard_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static ssize_t wiimod_bboard_calib_show(struct device *dev,
struct device_attribute *attr,
char *out)
{
struct wiimote_data *wdata = dev_to_wii(dev);
int i, j, ret;
__u16 val;
__u8 buf[24], offs;
ret = wiimote_cmd_acquire(wdata);
if (ret)
return ret;
ret = wiimote_cmd_read(wdata, 0xa40024, buf, 12);
if (ret != 12) {
wiimote_cmd_release(wdata);
return ret < 0 ? ret : -EIO;
}
ret = wiimote_cmd_read(wdata, 0xa40024 + 12, buf + 12, 12);
if (ret != 12) {
wiimote_cmd_release(wdata);
return ret < 0 ? ret : -EIO;
}
wiimote_cmd_release(wdata);
spin_lock_irq(&wdata->state.lock);
offs = 0;
for (i = 0; i < 3; ++i) {
for (j = 0; j < 4; ++j) {
wdata->state.calib_bboard[j][i] = buf[offs];
wdata->state.calib_bboard[j][i] <<= 8;
wdata->state.calib_bboard[j][i] |= buf[offs + 1];
offs += 2;
}
}
spin_unlock_irq(&wdata->state.lock);
ret = 0;
for (i = 0; i < 3; ++i) {
for (j = 0; j < 4; ++j) {
val = wdata->state.calib_bboard[j][i];
if (i == 2 && j == 3)
ret += sprintf(&out[ret], "%04x\n", val);
else
ret += sprintf(&out[ret], "%04x:", val);
}
}
return ret;
}
static DEVICE_ATTR(bboard_calib, S_IRUGO, wiimod_bboard_calib_show, NULL);
static int wiimod_bboard_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
int ret, i, j;
__u8 buf[24], offs;
wiimote_cmd_acquire_noint(wdata);
ret = wiimote_cmd_read(wdata, 0xa40024, buf, 12);
if (ret != 12) {
wiimote_cmd_release(wdata);
return ret < 0 ? ret : -EIO;
}
ret = wiimote_cmd_read(wdata, 0xa40024 + 12, buf + 12, 12);
if (ret != 12) {
wiimote_cmd_release(wdata);
return ret < 0 ? ret : -EIO;
}
wiimote_cmd_release(wdata);
offs = 0;
for (i = 0; i < 3; ++i) {
for (j = 0; j < 4; ++j) {
wdata->state.calib_bboard[j][i] = buf[offs];
wdata->state.calib_bboard[j][i] <<= 8;
wdata->state.calib_bboard[j][i] |= buf[offs + 1];
offs += 2;
}
}
wdata->extension.input = input_allocate_device();
if (!wdata->extension.input)
return -ENOMEM;
ret = device_create_file(&wdata->hdev->dev,
&dev_attr_bboard_calib);
if (ret) {
hid_err(wdata->hdev, "cannot create sysfs attribute\n");
goto err_free;
}
input_set_drvdata(wdata->extension.input, wdata);
wdata->extension.input->open = wiimod_bboard_open;
wdata->extension.input->close = wiimod_bboard_close;
wdata->extension.input->dev.parent = &wdata->hdev->dev;
wdata->extension.input->id.bustype = wdata->hdev->bus;
wdata->extension.input->id.vendor = wdata->hdev->vendor;
wdata->extension.input->id.product = wdata->hdev->product;
wdata->extension.input->id.version = wdata->hdev->version;
wdata->extension.input->name = WIIMOTE_NAME " Balance Board";
set_bit(EV_KEY, wdata->extension.input->evbit);
set_bit(BTN_A, wdata->extension.input->keybit);
set_bit(EV_ABS, wdata->extension.input->evbit);
set_bit(ABS_HAT0X, wdata->extension.input->absbit);
set_bit(ABS_HAT0Y, wdata->extension.input->absbit);
set_bit(ABS_HAT1X, wdata->extension.input->absbit);
set_bit(ABS_HAT1Y, wdata->extension.input->absbit);
input_set_abs_params(wdata->extension.input,
ABS_HAT0X, 0, 65535, 2, 4);
input_set_abs_params(wdata->extension.input,
ABS_HAT0Y, 0, 65535, 2, 4);
input_set_abs_params(wdata->extension.input,
ABS_HAT1X, 0, 65535, 2, 4);
input_set_abs_params(wdata->extension.input,
ABS_HAT1Y, 0, 65535, 2, 4);
ret = input_register_device(wdata->extension.input);
if (ret)
goto err_file;
return 0;
err_file:
device_remove_file(&wdata->hdev->dev,
&dev_attr_bboard_calib);
err_free:
input_free_device(wdata->extension.input);
wdata->extension.input = NULL;
return ret;
}
static void wiimod_bboard_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
if (!wdata->extension.input)
return;
input_unregister_device(wdata->extension.input);
wdata->extension.input = NULL;
device_remove_file(&wdata->hdev->dev,
&dev_attr_bboard_calib);
}
static const struct wiimod_ops wiimod_bboard = {
.flags = WIIMOD_FLAG_EXT8,
.arg = 0,
.probe = wiimod_bboard_probe,
.remove = wiimod_bboard_remove,
.in_keys = wiimod_bboard_in_keys,
.in_ext = wiimod_bboard_in_ext,
};
/*
* Pro Controller
* Released with the Wii U was the Nintendo Wii U Pro Controller. It does not
* work together with the classic Wii, but only with the new Wii U. However, it
* uses the same protocol and provides a builtin "classic controller pro"
* extension, few standard buttons, a rumble motor, 4 LEDs and a battery.
* We provide all these via a standard extension device as the device doesn't
* feature an extension port.
*/
enum wiimod_pro_keys {
WIIMOD_PRO_KEY_A,
WIIMOD_PRO_KEY_B,
WIIMOD_PRO_KEY_X,
WIIMOD_PRO_KEY_Y,
WIIMOD_PRO_KEY_PLUS,
WIIMOD_PRO_KEY_MINUS,
WIIMOD_PRO_KEY_HOME,
WIIMOD_PRO_KEY_LEFT,
WIIMOD_PRO_KEY_RIGHT,
WIIMOD_PRO_KEY_UP,
WIIMOD_PRO_KEY_DOWN,
WIIMOD_PRO_KEY_TL,
WIIMOD_PRO_KEY_TR,
WIIMOD_PRO_KEY_ZL,
WIIMOD_PRO_KEY_ZR,
WIIMOD_PRO_KEY_THUMBL,
WIIMOD_PRO_KEY_THUMBR,
WIIMOD_PRO_KEY_NUM,
};
static const __u16 wiimod_pro_map[] = {
BTN_EAST, /* WIIMOD_PRO_KEY_A */
BTN_SOUTH, /* WIIMOD_PRO_KEY_B */
BTN_NORTH, /* WIIMOD_PRO_KEY_X */
BTN_WEST, /* WIIMOD_PRO_KEY_Y */
BTN_START, /* WIIMOD_PRO_KEY_PLUS */
BTN_SELECT, /* WIIMOD_PRO_KEY_MINUS */
BTN_MODE, /* WIIMOD_PRO_KEY_HOME */
BTN_DPAD_LEFT, /* WIIMOD_PRO_KEY_LEFT */
BTN_DPAD_RIGHT, /* WIIMOD_PRO_KEY_RIGHT */
BTN_DPAD_UP, /* WIIMOD_PRO_KEY_UP */
BTN_DPAD_DOWN, /* WIIMOD_PRO_KEY_DOWN */
BTN_TL, /* WIIMOD_PRO_KEY_TL */
BTN_TR, /* WIIMOD_PRO_KEY_TR */
BTN_TL2, /* WIIMOD_PRO_KEY_ZL */
BTN_TR2, /* WIIMOD_PRO_KEY_ZR */
BTN_THUMBL, /* WIIMOD_PRO_KEY_THUMBL */
BTN_THUMBR, /* WIIMOD_PRO_KEY_THUMBR */
};
static void wiimod_pro_in_ext(struct wiimote_data *wdata, const __u8 *ext)
{
__s16 rx, ry, lx, ly;
/* Byte | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 1 | LX <7:0> |
* -----+-----------------------+-----------------------+
* 2 | 0 0 0 0 | LX <11:8> |
* -----+-----------------------+-----------------------+
* 3 | RX <7:0> |
* -----+-----------------------+-----------------------+
* 4 | 0 0 0 0 | RX <11:8> |
* -----+-----------------------+-----------------------+
* 5 | LY <7:0> |
* -----+-----------------------+-----------------------+
* 6 | 0 0 0 0 | LY <11:8> |
* -----+-----------------------+-----------------------+
* 7 | RY <7:0> |
* -----+-----------------------+-----------------------+
* 8 | 0 0 0 0 | RY <11:8> |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 9 | BDR | BDD | BLT | B- | BH | B+ | BRT | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 10 | BZL | BB | BY | BA | BX | BZR | BDL | BDU |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 11 | 1 | BATTERY | USB |CHARG|LTHUM|RTHUM|
* -----+-----+-----------------+-----------+-----+-----+
* All buttons are low-active (0 if pressed)
* RX and RY are right analog stick
* LX and LY are left analog stick
* BLT is left trigger, BRT is right trigger.
* BDR, BDD, BDL, BDU form the D-Pad with right, down, left, up buttons
* BZL is left Z button and BZR is right Z button
* B-, BH, B+ are +, HOME and - buttons
* BB, BY, BA, BX are A, B, X, Y buttons
*
* Bits marked as 0/1 are unknown and never changed during tests.
*
* Not entirely verified:
* CHARG: 1 if uncharging, 0 if charging
* USB: 1 if not connected, 0 if connected
* BATTERY: battery capacity from 000 (empty) to 100 (full)
*/
lx = (ext[0] & 0xff) | ((ext[1] & 0x0f) << 8);
rx = (ext[2] & 0xff) | ((ext[3] & 0x0f) << 8);
ly = (ext[4] & 0xff) | ((ext[5] & 0x0f) << 8);
ry = (ext[6] & 0xff) | ((ext[7] & 0x0f) << 8);
/* zero-point offsets */
lx -= 0x800;
ly = 0x800 - ly;
rx -= 0x800;
ry = 0x800 - ry;
/* Trivial automatic calibration. We don't know any calibration data
* in the EEPROM so we must use the first report to calibrate the
* null-position of the analog sticks. Users can retrigger calibration
* via sysfs, or set it explicitly. If data is off more than abs(500),
* we skip calibration as the sticks are likely to be moved already. */
if (!(wdata->state.flags & WIIPROTO_FLAG_PRO_CALIB_DONE)) {
wdata->state.flags |= WIIPROTO_FLAG_PRO_CALIB_DONE;
if (abs(lx) < 500)
wdata->state.calib_pro_sticks[0] = -lx;
if (abs(ly) < 500)
wdata->state.calib_pro_sticks[1] = -ly;
if (abs(rx) < 500)
wdata->state.calib_pro_sticks[2] = -rx;
if (abs(ry) < 500)
wdata->state.calib_pro_sticks[3] = -ry;
}
/* apply calibration data */
lx += wdata->state.calib_pro_sticks[0];
ly += wdata->state.calib_pro_sticks[1];
rx += wdata->state.calib_pro_sticks[2];
ry += wdata->state.calib_pro_sticks[3];
input_report_abs(wdata->extension.input, ABS_X, lx);
input_report_abs(wdata->extension.input, ABS_Y, ly);
input_report_abs(wdata->extension.input, ABS_RX, rx);
input_report_abs(wdata->extension.input, ABS_RY, ry);
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_RIGHT],
!(ext[8] & 0x80));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_DOWN],
!(ext[8] & 0x40));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_TL],
!(ext[8] & 0x20));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_MINUS],
!(ext[8] & 0x10));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_HOME],
!(ext[8] & 0x08));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_PLUS],
!(ext[8] & 0x04));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_TR],
!(ext[8] & 0x02));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_ZL],
!(ext[9] & 0x80));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_B],
!(ext[9] & 0x40));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_Y],
!(ext[9] & 0x20));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_A],
!(ext[9] & 0x10));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_X],
!(ext[9] & 0x08));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_ZR],
!(ext[9] & 0x04));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_LEFT],
!(ext[9] & 0x02));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_UP],
!(ext[9] & 0x01));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_THUMBL],
!(ext[10] & 0x02));
input_report_key(wdata->extension.input,
wiimod_pro_map[WIIMOD_PRO_KEY_THUMBR],
!(ext[10] & 0x01));
input_sync(wdata->extension.input);
}
static int wiimod_pro_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_pro_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static int wiimod_pro_play(struct input_dev *dev, void *data,
struct ff_effect *eff)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
__u8 value;
/*
* The wiimote supports only a single rumble motor so if any magnitude
* is set to non-zero then we start the rumble motor. If both are set to
* zero, we stop the rumble motor.
*/
if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
value = 1;
else
value = 0;
/* Locking state.lock here might deadlock with input_event() calls.
* schedule_work acts as barrier. Merging multiple changes is fine. */
wdata->state.cache_rumble = value;
schedule_work(&wdata->rumble_worker);
return 0;
}
static ssize_t wiimod_pro_calib_show(struct device *dev,
struct device_attribute *attr,
char *out)
{
struct wiimote_data *wdata = dev_to_wii(dev);
int r;
r = 0;
r += sprintf(&out[r], "%+06hd:", wdata->state.calib_pro_sticks[0]);
r += sprintf(&out[r], "%+06hd ", wdata->state.calib_pro_sticks[1]);
r += sprintf(&out[r], "%+06hd:", wdata->state.calib_pro_sticks[2]);
r += sprintf(&out[r], "%+06hd\n", wdata->state.calib_pro_sticks[3]);
return r;
}
static ssize_t wiimod_pro_calib_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct wiimote_data *wdata = dev_to_wii(dev);
int r;
s16 x1, y1, x2, y2;
if (!strncmp(buf, "scan\n", 5)) {
spin_lock_irq(&wdata->state.lock);
wdata->state.flags &= ~WIIPROTO_FLAG_PRO_CALIB_DONE;
spin_unlock_irq(&wdata->state.lock);
} else {
r = sscanf(buf, "%hd:%hd %hd:%hd", &x1, &y1, &x2, &y2);
if (r != 4)
return -EINVAL;
spin_lock_irq(&wdata->state.lock);
wdata->state.flags |= WIIPROTO_FLAG_PRO_CALIB_DONE;
spin_unlock_irq(&wdata->state.lock);
wdata->state.calib_pro_sticks[0] = x1;
wdata->state.calib_pro_sticks[1] = y1;
wdata->state.calib_pro_sticks[2] = x2;
wdata->state.calib_pro_sticks[3] = y2;
}
return strnlen(buf, PAGE_SIZE);
}
static DEVICE_ATTR(pro_calib, S_IRUGO|S_IWUSR|S_IWGRP, wiimod_pro_calib_show,
wiimod_pro_calib_store);
static int wiimod_pro_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
int ret, i;
unsigned long flags;
INIT_WORK(&wdata->rumble_worker, wiimod_rumble_worker);
wdata->state.calib_pro_sticks[0] = 0;
wdata->state.calib_pro_sticks[1] = 0;
wdata->state.calib_pro_sticks[2] = 0;
wdata->state.calib_pro_sticks[3] = 0;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAG_PRO_CALIB_DONE;
spin_unlock_irqrestore(&wdata->state.lock, flags);
wdata->extension.input = input_allocate_device();
if (!wdata->extension.input)
return -ENOMEM;
set_bit(FF_RUMBLE, wdata->extension.input->ffbit);
input_set_drvdata(wdata->extension.input, wdata);
if (input_ff_create_memless(wdata->extension.input, NULL,
wiimod_pro_play)) {
ret = -ENOMEM;
goto err_free;
}
ret = device_create_file(&wdata->hdev->dev,
&dev_attr_pro_calib);
if (ret) {
hid_err(wdata->hdev, "cannot create sysfs attribute\n");
goto err_free;
}
wdata->extension.input->open = wiimod_pro_open;
wdata->extension.input->close = wiimod_pro_close;
wdata->extension.input->dev.parent = &wdata->hdev->dev;
wdata->extension.input->id.bustype = wdata->hdev->bus;
wdata->extension.input->id.vendor = wdata->hdev->vendor;
wdata->extension.input->id.product = wdata->hdev->product;
wdata->extension.input->id.version = wdata->hdev->version;
wdata->extension.input->name = WIIMOTE_NAME " Pro Controller";
set_bit(EV_KEY, wdata->extension.input->evbit);
for (i = 0; i < WIIMOD_PRO_KEY_NUM; ++i)
set_bit(wiimod_pro_map[i],
wdata->extension.input->keybit);
set_bit(EV_ABS, wdata->extension.input->evbit);
set_bit(ABS_X, wdata->extension.input->absbit);
set_bit(ABS_Y, wdata->extension.input->absbit);
set_bit(ABS_RX, wdata->extension.input->absbit);
set_bit(ABS_RY, wdata->extension.input->absbit);
input_set_abs_params(wdata->extension.input,
ABS_X, -0x400, 0x400, 4, 100);
input_set_abs_params(wdata->extension.input,
ABS_Y, -0x400, 0x400, 4, 100);
input_set_abs_params(wdata->extension.input,
ABS_RX, -0x400, 0x400, 4, 100);
input_set_abs_params(wdata->extension.input,
ABS_RY, -0x400, 0x400, 4, 100);
ret = input_register_device(wdata->extension.input);
if (ret)
goto err_file;
return 0;
err_file:
device_remove_file(&wdata->hdev->dev,
&dev_attr_pro_calib);
err_free:
input_free_device(wdata->extension.input);
wdata->extension.input = NULL;
return ret;
}
static void wiimod_pro_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
unsigned long flags;
if (!wdata->extension.input)
return;
input_unregister_device(wdata->extension.input);
wdata->extension.input = NULL;
cancel_work_sync(&wdata->rumble_worker);
device_remove_file(&wdata->hdev->dev,
&dev_attr_pro_calib);
spin_lock_irqsave(&wdata->state.lock, flags);
wiiproto_req_rumble(wdata, 0);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static const struct wiimod_ops wiimod_pro = {
.flags = WIIMOD_FLAG_EXT16,
.arg = 0,
.probe = wiimod_pro_probe,
.remove = wiimod_pro_remove,
.in_ext = wiimod_pro_in_ext,
};
/*
* Builtin Motion Plus
* This module simply sets the WIIPROTO_FLAG_BUILTIN_MP protocol flag which
* disables polling for Motion-Plus. This should be set only for devices which
* don't allow MP hotplugging.
*/
static int wiimod_builtin_mp_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_BUILTIN_MP;
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_builtin_mp_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_BUILTIN_MP;
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static const struct wiimod_ops wiimod_builtin_mp = {
.flags = 0,
.arg = 0,
.probe = wiimod_builtin_mp_probe,
.remove = wiimod_builtin_mp_remove,
};
/*
* No Motion Plus
* This module simply sets the WIIPROTO_FLAG_NO_MP protocol flag which
* disables motion-plus. This is needed for devices that advertise this but we
* don't know how to use it (or whether it is actually present).
*/
static int wiimod_no_mp_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_NO_MP;
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_no_mp_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_NO_MP;
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static const struct wiimod_ops wiimod_no_mp = {
.flags = 0,
.arg = 0,
.probe = wiimod_no_mp_probe,
.remove = wiimod_no_mp_remove,
};
HID: wiimote: add extension hotplug support The Wii Remote has several extension ports. The first port (EXT) provides hotplug events whenever an extension is plugged. The second port (MP) does not provide hotplug events by default. Instead, we have to map MP into EXT to get events for it. This patch introduces hotplug support for extensions. It is fairly complicated to get this right because the Wii Remote sends a lot of noise-hotplug events while activating extension ports. We need to filter the events and only handle the events that are real hotplug events. Mapping MP into EXT is easy. But if we want both, MP _and_ EXT at the same time, we need to map MP into EXT and enable a passthrough-mode. This will then send real EXT events through the mapped MP interleaved with real MP events. But once MP is mapped, we no longer have access to the real EXT registers so we need to perform setup _before_ mapping MP. Furthermore, we no longer can read EXT IDs so we cannot verify if EXT is still the same extension that we expect it to be. We deal with this by unmapping MP whenever we got into a situation where EXT might have changed. We then re-read EXT and MP and remap everything. The real Wii Console takes a fairly easy approach: It simply reconnects to the device on hotplug events that it didn't expect. So if a program wants MP events, but MP is disconnected, it fails and reconnects so it can wait for MP hotplug events again. This simplifies hotplugging a lot because we just react on PLUG events and ignore UNPLUG events. The more sophisticated Wii applications avoid reconnection (well, they still reconnect during many weird events, but at least not during UNPLUG) but they start polling the device. This allows them to disable the device, poll for the extension ports to settle and then initialize them again. Unfortunately, this approach fails whenever an extension is replugged while it is initialized. We would loose UNPLUG events and polling the device later will give unreliable results because the extension port might be in some weird state, even though it's actually unplugged. Our approach is a real HOTPLUG approch. We keep track of the EXT and mapped MP hotplug events whenever they occur. We then re-evaluate the device state and initialize any possible new extension or deinitialize any gone extension. Only during initialization, we set an extension port ACTIVE. However, during an unplug event we mark them as INACTIVE. This guarantess that a fast UNPLUG -> PLUG event sequence doesn't keep them marked as PLUGGED+ACTIVE but only PLUGGED. To deal with annoying noise-hotplug events during extension mapping, we simply rescan the device before performing any mapping. This allows us to ignore all the noise events as long as the device is in the correct state. Long story short: EXT and MP registers are sparsely known and we need to jump through hoops to get reliable HOTPLUG working. But while Nintendo needs *FOUR* Bluetooth reconnections for the shortest imaginable boot->menu->game->menu->shutdown sequence, we now need *ZERO*. As always, 3rd party devices tend to break whenever we behave differently than the original Wii. So there are also devices which _expect_ a disconnect after UNPLUG. Obviously, these devices won't benefit from this patch. But all official devices were tested extensively and work great during any hotplug sequence. Yay! Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-06 05:12:57 +08:00
/*
* Motion Plus
* The Motion Plus extension provides rotation sensors (gyro) as a small
* extension device for Wii Remotes. Many devices have them built-in so
* you cannot see them from the outside.
* Motion Plus extensions are special because they are on a separate extension
* port and allow other extensions to be used simultaneously. This is all
* handled by the Wiimote Core so we don't have to deal with it.
HID: wiimote: add extension hotplug support The Wii Remote has several extension ports. The first port (EXT) provides hotplug events whenever an extension is plugged. The second port (MP) does not provide hotplug events by default. Instead, we have to map MP into EXT to get events for it. This patch introduces hotplug support for extensions. It is fairly complicated to get this right because the Wii Remote sends a lot of noise-hotplug events while activating extension ports. We need to filter the events and only handle the events that are real hotplug events. Mapping MP into EXT is easy. But if we want both, MP _and_ EXT at the same time, we need to map MP into EXT and enable a passthrough-mode. This will then send real EXT events through the mapped MP interleaved with real MP events. But once MP is mapped, we no longer have access to the real EXT registers so we need to perform setup _before_ mapping MP. Furthermore, we no longer can read EXT IDs so we cannot verify if EXT is still the same extension that we expect it to be. We deal with this by unmapping MP whenever we got into a situation where EXT might have changed. We then re-read EXT and MP and remap everything. The real Wii Console takes a fairly easy approach: It simply reconnects to the device on hotplug events that it didn't expect. So if a program wants MP events, but MP is disconnected, it fails and reconnects so it can wait for MP hotplug events again. This simplifies hotplugging a lot because we just react on PLUG events and ignore UNPLUG events. The more sophisticated Wii applications avoid reconnection (well, they still reconnect during many weird events, but at least not during UNPLUG) but they start polling the device. This allows them to disable the device, poll for the extension ports to settle and then initialize them again. Unfortunately, this approach fails whenever an extension is replugged while it is initialized. We would loose UNPLUG events and polling the device later will give unreliable results because the extension port might be in some weird state, even though it's actually unplugged. Our approach is a real HOTPLUG approch. We keep track of the EXT and mapped MP hotplug events whenever they occur. We then re-evaluate the device state and initialize any possible new extension or deinitialize any gone extension. Only during initialization, we set an extension port ACTIVE. However, during an unplug event we mark them as INACTIVE. This guarantess that a fast UNPLUG -> PLUG event sequence doesn't keep them marked as PLUGGED+ACTIVE but only PLUGGED. To deal with annoying noise-hotplug events during extension mapping, we simply rescan the device before performing any mapping. This allows us to ignore all the noise events as long as the device is in the correct state. Long story short: EXT and MP registers are sparsely known and we need to jump through hoops to get reliable HOTPLUG working. But while Nintendo needs *FOUR* Bluetooth reconnections for the shortest imaginable boot->menu->game->menu->shutdown sequence, we now need *ZERO*. As always, 3rd party devices tend to break whenever we behave differently than the original Wii. So there are also devices which _expect_ a disconnect after UNPLUG. Obviously, these devices won't benefit from this patch. But all official devices were tested extensively and work great during any hotplug sequence. Yay! Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-06 05:12:57 +08:00
*/
static void wiimod_mp_in_mp(struct wiimote_data *wdata, const __u8 *ext)
{
__s32 x, y, z;
/* | 8 7 6 5 4 3 | 2 | 1 |
* -----+------------------------------+-----+-----+
* 1 | Yaw Speed <7:0> |
* 2 | Roll Speed <7:0> |
* 3 | Pitch Speed <7:0> |
* -----+------------------------------+-----+-----+
* 4 | Yaw Speed <13:8> | Yaw |Pitch|
* -----+------------------------------+-----+-----+
* 5 | Roll Speed <13:8> |Roll | Ext |
* -----+------------------------------+-----+-----+
* 6 | Pitch Speed <13:8> | 1 | 0 |
* -----+------------------------------+-----+-----+
* The single bits Yaw, Roll, Pitch in the lower right corner specify
* whether the wiimote is rotating fast (0) or slow (1). Speed for slow
* roation is 440 deg/s and for fast rotation 2000 deg/s. To get a
* linear scale we multiply by 2000/440 = ~4.5454 which is 18 for fast
* and 9 for slow.
* If the wiimote is not rotating the sensor reports 2^13 = 8192.
* Ext specifies whether an extension is connected to the motionp.
* which is parsed by wiimote-core.
*/
x = ext[0];
y = ext[1];
z = ext[2];
x |= (((__u16)ext[3]) << 6) & 0xff00;
y |= (((__u16)ext[4]) << 6) & 0xff00;
z |= (((__u16)ext[5]) << 6) & 0xff00;
x -= 8192;
y -= 8192;
z -= 8192;
if (!(ext[3] & 0x02))
x *= 18;
else
x *= 9;
if (!(ext[4] & 0x02))
y *= 18;
else
y *= 9;
if (!(ext[3] & 0x01))
z *= 18;
else
z *= 9;
input_report_abs(wdata->mp, ABS_RX, x);
input_report_abs(wdata->mp, ABS_RY, y);
input_report_abs(wdata->mp, ABS_RZ, z);
input_sync(wdata->mp);
}
static int wiimod_mp_open(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags |= WIIPROTO_FLAG_MP_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
__wiimote_schedule(wdata);
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
}
static void wiimod_mp_close(struct input_dev *dev)
{
struct wiimote_data *wdata = input_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->state.flags &= ~WIIPROTO_FLAG_MP_USED;
wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
__wiimote_schedule(wdata);
spin_unlock_irqrestore(&wdata->state.lock, flags);
}
static int wiimod_mp_probe(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
int ret;
wdata->mp = input_allocate_device();
if (!wdata->mp)
return -ENOMEM;
input_set_drvdata(wdata->mp, wdata);
wdata->mp->open = wiimod_mp_open;
wdata->mp->close = wiimod_mp_close;
wdata->mp->dev.parent = &wdata->hdev->dev;
wdata->mp->id.bustype = wdata->hdev->bus;
wdata->mp->id.vendor = wdata->hdev->vendor;
wdata->mp->id.product = wdata->hdev->product;
wdata->mp->id.version = wdata->hdev->version;
wdata->mp->name = WIIMOTE_NAME " Motion Plus";
set_bit(EV_ABS, wdata->mp->evbit);
set_bit(ABS_RX, wdata->mp->absbit);
set_bit(ABS_RY, wdata->mp->absbit);
set_bit(ABS_RZ, wdata->mp->absbit);
input_set_abs_params(wdata->mp,
ABS_RX, -16000, 16000, 4, 8);
input_set_abs_params(wdata->mp,
ABS_RY, -16000, 16000, 4, 8);
input_set_abs_params(wdata->mp,
ABS_RZ, -16000, 16000, 4, 8);
ret = input_register_device(wdata->mp);
if (ret)
goto err_free;
return 0;
err_free:
input_free_device(wdata->mp);
wdata->mp = NULL;
return ret;
}
static void wiimod_mp_remove(const struct wiimod_ops *ops,
struct wiimote_data *wdata)
{
if (!wdata->mp)
return;
input_unregister_device(wdata->mp);
wdata->mp = NULL;
}
HID: wiimote: add extension hotplug support The Wii Remote has several extension ports. The first port (EXT) provides hotplug events whenever an extension is plugged. The second port (MP) does not provide hotplug events by default. Instead, we have to map MP into EXT to get events for it. This patch introduces hotplug support for extensions. It is fairly complicated to get this right because the Wii Remote sends a lot of noise-hotplug events while activating extension ports. We need to filter the events and only handle the events that are real hotplug events. Mapping MP into EXT is easy. But if we want both, MP _and_ EXT at the same time, we need to map MP into EXT and enable a passthrough-mode. This will then send real EXT events through the mapped MP interleaved with real MP events. But once MP is mapped, we no longer have access to the real EXT registers so we need to perform setup _before_ mapping MP. Furthermore, we no longer can read EXT IDs so we cannot verify if EXT is still the same extension that we expect it to be. We deal with this by unmapping MP whenever we got into a situation where EXT might have changed. We then re-read EXT and MP and remap everything. The real Wii Console takes a fairly easy approach: It simply reconnects to the device on hotplug events that it didn't expect. So if a program wants MP events, but MP is disconnected, it fails and reconnects so it can wait for MP hotplug events again. This simplifies hotplugging a lot because we just react on PLUG events and ignore UNPLUG events. The more sophisticated Wii applications avoid reconnection (well, they still reconnect during many weird events, but at least not during UNPLUG) but they start polling the device. This allows them to disable the device, poll for the extension ports to settle and then initialize them again. Unfortunately, this approach fails whenever an extension is replugged while it is initialized. We would loose UNPLUG events and polling the device later will give unreliable results because the extension port might be in some weird state, even though it's actually unplugged. Our approach is a real HOTPLUG approch. We keep track of the EXT and mapped MP hotplug events whenever they occur. We then re-evaluate the device state and initialize any possible new extension or deinitialize any gone extension. Only during initialization, we set an extension port ACTIVE. However, during an unplug event we mark them as INACTIVE. This guarantess that a fast UNPLUG -> PLUG event sequence doesn't keep them marked as PLUGGED+ACTIVE but only PLUGGED. To deal with annoying noise-hotplug events during extension mapping, we simply rescan the device before performing any mapping. This allows us to ignore all the noise events as long as the device is in the correct state. Long story short: EXT and MP registers are sparsely known and we need to jump through hoops to get reliable HOTPLUG working. But while Nintendo needs *FOUR* Bluetooth reconnections for the shortest imaginable boot->menu->game->menu->shutdown sequence, we now need *ZERO*. As always, 3rd party devices tend to break whenever we behave differently than the original Wii. So there are also devices which _expect_ a disconnect after UNPLUG. Obviously, these devices won't benefit from this patch. But all official devices were tested extensively and work great during any hotplug sequence. Yay! Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-06 05:12:57 +08:00
const struct wiimod_ops wiimod_mp = {
.flags = 0,
.arg = 0,
.probe = wiimod_mp_probe,
.remove = wiimod_mp_remove,
.in_mp = wiimod_mp_in_mp,
HID: wiimote: add extension hotplug support The Wii Remote has several extension ports. The first port (EXT) provides hotplug events whenever an extension is plugged. The second port (MP) does not provide hotplug events by default. Instead, we have to map MP into EXT to get events for it. This patch introduces hotplug support for extensions. It is fairly complicated to get this right because the Wii Remote sends a lot of noise-hotplug events while activating extension ports. We need to filter the events and only handle the events that are real hotplug events. Mapping MP into EXT is easy. But if we want both, MP _and_ EXT at the same time, we need to map MP into EXT and enable a passthrough-mode. This will then send real EXT events through the mapped MP interleaved with real MP events. But once MP is mapped, we no longer have access to the real EXT registers so we need to perform setup _before_ mapping MP. Furthermore, we no longer can read EXT IDs so we cannot verify if EXT is still the same extension that we expect it to be. We deal with this by unmapping MP whenever we got into a situation where EXT might have changed. We then re-read EXT and MP and remap everything. The real Wii Console takes a fairly easy approach: It simply reconnects to the device on hotplug events that it didn't expect. So if a program wants MP events, but MP is disconnected, it fails and reconnects so it can wait for MP hotplug events again. This simplifies hotplugging a lot because we just react on PLUG events and ignore UNPLUG events. The more sophisticated Wii applications avoid reconnection (well, they still reconnect during many weird events, but at least not during UNPLUG) but they start polling the device. This allows them to disable the device, poll for the extension ports to settle and then initialize them again. Unfortunately, this approach fails whenever an extension is replugged while it is initialized. We would loose UNPLUG events and polling the device later will give unreliable results because the extension port might be in some weird state, even though it's actually unplugged. Our approach is a real HOTPLUG approch. We keep track of the EXT and mapped MP hotplug events whenever they occur. We then re-evaluate the device state and initialize any possible new extension or deinitialize any gone extension. Only during initialization, we set an extension port ACTIVE. However, during an unplug event we mark them as INACTIVE. This guarantess that a fast UNPLUG -> PLUG event sequence doesn't keep them marked as PLUGGED+ACTIVE but only PLUGGED. To deal with annoying noise-hotplug events during extension mapping, we simply rescan the device before performing any mapping. This allows us to ignore all the noise events as long as the device is in the correct state. Long story short: EXT and MP registers are sparsely known and we need to jump through hoops to get reliable HOTPLUG working. But while Nintendo needs *FOUR* Bluetooth reconnections for the shortest imaginable boot->menu->game->menu->shutdown sequence, we now need *ZERO*. As always, 3rd party devices tend to break whenever we behave differently than the original Wii. So there are also devices which _expect_ a disconnect after UNPLUG. Obviously, these devices won't benefit from this patch. But all official devices were tested extensively and work great during any hotplug sequence. Yay! Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-06 05:12:57 +08:00
};
/* module table */
HID: wiimote: add extension hotplug support The Wii Remote has several extension ports. The first port (EXT) provides hotplug events whenever an extension is plugged. The second port (MP) does not provide hotplug events by default. Instead, we have to map MP into EXT to get events for it. This patch introduces hotplug support for extensions. It is fairly complicated to get this right because the Wii Remote sends a lot of noise-hotplug events while activating extension ports. We need to filter the events and only handle the events that are real hotplug events. Mapping MP into EXT is easy. But if we want both, MP _and_ EXT at the same time, we need to map MP into EXT and enable a passthrough-mode. This will then send real EXT events through the mapped MP interleaved with real MP events. But once MP is mapped, we no longer have access to the real EXT registers so we need to perform setup _before_ mapping MP. Furthermore, we no longer can read EXT IDs so we cannot verify if EXT is still the same extension that we expect it to be. We deal with this by unmapping MP whenever we got into a situation where EXT might have changed. We then re-read EXT and MP and remap everything. The real Wii Console takes a fairly easy approach: It simply reconnects to the device on hotplug events that it didn't expect. So if a program wants MP events, but MP is disconnected, it fails and reconnects so it can wait for MP hotplug events again. This simplifies hotplugging a lot because we just react on PLUG events and ignore UNPLUG events. The more sophisticated Wii applications avoid reconnection (well, they still reconnect during many weird events, but at least not during UNPLUG) but they start polling the device. This allows them to disable the device, poll for the extension ports to settle and then initialize them again. Unfortunately, this approach fails whenever an extension is replugged while it is initialized. We would loose UNPLUG events and polling the device later will give unreliable results because the extension port might be in some weird state, even though it's actually unplugged. Our approach is a real HOTPLUG approch. We keep track of the EXT and mapped MP hotplug events whenever they occur. We then re-evaluate the device state and initialize any possible new extension or deinitialize any gone extension. Only during initialization, we set an extension port ACTIVE. However, during an unplug event we mark them as INACTIVE. This guarantess that a fast UNPLUG -> PLUG event sequence doesn't keep them marked as PLUGGED+ACTIVE but only PLUGGED. To deal with annoying noise-hotplug events during extension mapping, we simply rescan the device before performing any mapping. This allows us to ignore all the noise events as long as the device is in the correct state. Long story short: EXT and MP registers are sparsely known and we need to jump through hoops to get reliable HOTPLUG working. But while Nintendo needs *FOUR* Bluetooth reconnections for the shortest imaginable boot->menu->game->menu->shutdown sequence, we now need *ZERO*. As always, 3rd party devices tend to break whenever we behave differently than the original Wii. So there are also devices which _expect_ a disconnect after UNPLUG. Obviously, these devices won't benefit from this patch. But all official devices were tested extensively and work great during any hotplug sequence. Yay! Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-06 05:12:57 +08:00
static const struct wiimod_ops wiimod_dummy;
const struct wiimod_ops *wiimod_table[WIIMOD_NUM] = {
[WIIMOD_KEYS] = &wiimod_keys,
[WIIMOD_RUMBLE] = &wiimod_rumble,
[WIIMOD_BATTERY] = &wiimod_battery,
[WIIMOD_LED1] = &wiimod_leds[0],
[WIIMOD_LED2] = &wiimod_leds[1],
[WIIMOD_LED3] = &wiimod_leds[2],
[WIIMOD_LED4] = &wiimod_leds[3],
[WIIMOD_ACCEL] = &wiimod_accel,
[WIIMOD_IR] = &wiimod_ir,
[WIIMOD_BUILTIN_MP] = &wiimod_builtin_mp,
[WIIMOD_NO_MP] = &wiimod_no_mp,
};
HID: wiimote: add extension hotplug support The Wii Remote has several extension ports. The first port (EXT) provides hotplug events whenever an extension is plugged. The second port (MP) does not provide hotplug events by default. Instead, we have to map MP into EXT to get events for it. This patch introduces hotplug support for extensions. It is fairly complicated to get this right because the Wii Remote sends a lot of noise-hotplug events while activating extension ports. We need to filter the events and only handle the events that are real hotplug events. Mapping MP into EXT is easy. But if we want both, MP _and_ EXT at the same time, we need to map MP into EXT and enable a passthrough-mode. This will then send real EXT events through the mapped MP interleaved with real MP events. But once MP is mapped, we no longer have access to the real EXT registers so we need to perform setup _before_ mapping MP. Furthermore, we no longer can read EXT IDs so we cannot verify if EXT is still the same extension that we expect it to be. We deal with this by unmapping MP whenever we got into a situation where EXT might have changed. We then re-read EXT and MP and remap everything. The real Wii Console takes a fairly easy approach: It simply reconnects to the device on hotplug events that it didn't expect. So if a program wants MP events, but MP is disconnected, it fails and reconnects so it can wait for MP hotplug events again. This simplifies hotplugging a lot because we just react on PLUG events and ignore UNPLUG events. The more sophisticated Wii applications avoid reconnection (well, they still reconnect during many weird events, but at least not during UNPLUG) but they start polling the device. This allows them to disable the device, poll for the extension ports to settle and then initialize them again. Unfortunately, this approach fails whenever an extension is replugged while it is initialized. We would loose UNPLUG events and polling the device later will give unreliable results because the extension port might be in some weird state, even though it's actually unplugged. Our approach is a real HOTPLUG approch. We keep track of the EXT and mapped MP hotplug events whenever they occur. We then re-evaluate the device state and initialize any possible new extension or deinitialize any gone extension. Only during initialization, we set an extension port ACTIVE. However, during an unplug event we mark them as INACTIVE. This guarantess that a fast UNPLUG -> PLUG event sequence doesn't keep them marked as PLUGGED+ACTIVE but only PLUGGED. To deal with annoying noise-hotplug events during extension mapping, we simply rescan the device before performing any mapping. This allows us to ignore all the noise events as long as the device is in the correct state. Long story short: EXT and MP registers are sparsely known and we need to jump through hoops to get reliable HOTPLUG working. But while Nintendo needs *FOUR* Bluetooth reconnections for the shortest imaginable boot->menu->game->menu->shutdown sequence, we now need *ZERO*. As always, 3rd party devices tend to break whenever we behave differently than the original Wii. So there are also devices which _expect_ a disconnect after UNPLUG. Obviously, these devices won't benefit from this patch. But all official devices were tested extensively and work great during any hotplug sequence. Yay! Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-06 05:12:57 +08:00
const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM] = {
[WIIMOTE_EXT_NONE] = &wiimod_dummy,
[WIIMOTE_EXT_UNKNOWN] = &wiimod_dummy,
[WIIMOTE_EXT_NUNCHUK] = &wiimod_nunchuk,
[WIIMOTE_EXT_CLASSIC_CONTROLLER] = &wiimod_classic,
[WIIMOTE_EXT_BALANCE_BOARD] = &wiimod_bboard,
[WIIMOTE_EXT_PRO_CONTROLLER] = &wiimod_pro,
HID: wiimote: add extension hotplug support The Wii Remote has several extension ports. The first port (EXT) provides hotplug events whenever an extension is plugged. The second port (MP) does not provide hotplug events by default. Instead, we have to map MP into EXT to get events for it. This patch introduces hotplug support for extensions. It is fairly complicated to get this right because the Wii Remote sends a lot of noise-hotplug events while activating extension ports. We need to filter the events and only handle the events that are real hotplug events. Mapping MP into EXT is easy. But if we want both, MP _and_ EXT at the same time, we need to map MP into EXT and enable a passthrough-mode. This will then send real EXT events through the mapped MP interleaved with real MP events. But once MP is mapped, we no longer have access to the real EXT registers so we need to perform setup _before_ mapping MP. Furthermore, we no longer can read EXT IDs so we cannot verify if EXT is still the same extension that we expect it to be. We deal with this by unmapping MP whenever we got into a situation where EXT might have changed. We then re-read EXT and MP and remap everything. The real Wii Console takes a fairly easy approach: It simply reconnects to the device on hotplug events that it didn't expect. So if a program wants MP events, but MP is disconnected, it fails and reconnects so it can wait for MP hotplug events again. This simplifies hotplugging a lot because we just react on PLUG events and ignore UNPLUG events. The more sophisticated Wii applications avoid reconnection (well, they still reconnect during many weird events, but at least not during UNPLUG) but they start polling the device. This allows them to disable the device, poll for the extension ports to settle and then initialize them again. Unfortunately, this approach fails whenever an extension is replugged while it is initialized. We would loose UNPLUG events and polling the device later will give unreliable results because the extension port might be in some weird state, even though it's actually unplugged. Our approach is a real HOTPLUG approch. We keep track of the EXT and mapped MP hotplug events whenever they occur. We then re-evaluate the device state and initialize any possible new extension or deinitialize any gone extension. Only during initialization, we set an extension port ACTIVE. However, during an unplug event we mark them as INACTIVE. This guarantess that a fast UNPLUG -> PLUG event sequence doesn't keep them marked as PLUGGED+ACTIVE but only PLUGGED. To deal with annoying noise-hotplug events during extension mapping, we simply rescan the device before performing any mapping. This allows us to ignore all the noise events as long as the device is in the correct state. Long story short: EXT and MP registers are sparsely known and we need to jump through hoops to get reliable HOTPLUG working. But while Nintendo needs *FOUR* Bluetooth reconnections for the shortest imaginable boot->menu->game->menu->shutdown sequence, we now need *ZERO*. As always, 3rd party devices tend to break whenever we behave differently than the original Wii. So there are also devices which _expect_ a disconnect after UNPLUG. Obviously, these devices won't benefit from this patch. But all official devices were tested extensively and work great during any hotplug sequence. Yay! Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-06 05:12:57 +08:00
};