From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
To: Jiri Kosina <jikos@kernel.org>, Ping Cheng <pinglinux@gmail.com>,
Jason Gerecke <killertofu@gmail.com>,
Aaron Skomra <skomra@gmail.com>,
Peter Hutterer <peter.hutterer@who-t.net>
Cc: linux-kernel@vger.kernel.org, linux-input@vger.kernel.org
Subject: [PATCH v2 14/30] HID: wacom: EKR: add a worker to add/remove resources on addition/removal
Date: Wed, 13 Jul 2016 18:06:01 +0200 [thread overview]
Message-ID: <1468425977-4819-15-git-send-email-benjamin.tissoires@redhat.com> (raw)
In-Reply-To: <1468425977-4819-1-git-send-email-benjamin.tissoires@redhat.com>
wacom_remote_status_irq() sends information of addition/removal of EKR.
We want to allocate one input node per remote, so better having this
in a separate worker, not handled in the IRQ directly.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---
Changes in v2:
- removed warning: missing braces around initializer in
wacom_remote_status_irq()
- added missing spin_unlock_irqrestore()
- make wacom_remote_status_irq() returning void to not confuse the reader
as the return value is not an error code
---
drivers/hid/wacom.h | 11 +++++--
drivers/hid/wacom_sys.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++--
drivers/hid/wacom_wac.c | 53 +++++++++++++-------------------
drivers/hid/wacom_wac.h | 7 +++++
4 files changed, 113 insertions(+), 38 deletions(-)
diff --git a/drivers/hid/wacom.h b/drivers/hid/wacom.h
index 8ac1eb8..1797e4b 100644
--- a/drivers/hid/wacom.h
+++ b/drivers/hid/wacom.h
@@ -90,6 +90,7 @@
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/hid.h>
+#include <linux/kfifo.h>
#include <linux/usb/input.h>
#include <linux/power_supply.h>
#include <asm/unaligned.h>
@@ -108,6 +109,7 @@
enum wacom_worker {
WACOM_WORKER_WIRELESS,
WACOM_WORKER_BATTERY,
+ WACOM_WORKER_REMOTE,
};
struct wacom_group_leds {
@@ -122,6 +124,9 @@ struct wacom {
struct mutex lock;
struct work_struct wireless_work;
struct work_struct battery_work;
+ struct work_struct remote_work;
+ spinlock_t remote_lock;
+ struct kfifo remote_fifo;
struct wacom_leds {
struct wacom_group_leds *groups;
u8 llv; /* status led brightness no button (1..127) */
@@ -149,6 +154,9 @@ static inline void wacom_schedule_work(struct wacom_wac *wacom_wac,
case WACOM_WORKER_BATTERY:
schedule_work(&wacom->battery_work);
break;
+ case WACOM_WORKER_REMOTE:
+ schedule_work(&wacom->remote_work);
+ break;
}
}
@@ -168,7 +176,4 @@ int wacom_wac_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value);
void wacom_wac_report(struct hid_device *hdev, struct hid_report *report);
void wacom_battery_work(struct work_struct *work);
-int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
- int index);
-void wacom_remote_destroy_attr_group(struct wacom *wacom, __u32 serial);
#endif
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 4d4c737..7e01117 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -1294,7 +1294,8 @@ DEVICE_EKR_ATTR_GROUP(2);
DEVICE_EKR_ATTR_GROUP(3);
DEVICE_EKR_ATTR_GROUP(4);
-int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, int index)
+static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
+ int index)
{
int error = 0;
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
@@ -1318,7 +1319,7 @@ int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, int index)
return 0;
}
-void wacom_remote_destroy_attr_group(struct wacom *wacom, __u32 serial)
+static void wacom_remote_destroy_attr_group(struct wacom *wacom, __u32 serial)
{
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
int i;
@@ -1889,6 +1890,65 @@ fail:
return;
}
+static void wacom_remote_work(struct work_struct *work)
+{
+ struct wacom *wacom = container_of(work, struct wacom, remote_work);
+ struct wacom_wac *wacom_wac = &wacom->wacom_wac;
+ struct wacom_remote_data data;
+ unsigned long flags;
+ unsigned int count;
+ u32 serial;
+ int i, k;
+
+ spin_lock_irqsave(&wacom->remote_lock, flags);
+
+ count = kfifo_out(&wacom->remote_fifo, &data, sizeof(data));
+
+ if (count != sizeof(data)) {
+ hid_err(wacom->hdev,
+ "workitem triggered without status available\n");
+ spin_unlock_irqrestore(&wacom->remote_lock, flags);
+ return;
+ }
+
+ if (!kfifo_is_empty(&wacom->remote_fifo))
+ wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
+
+ spin_unlock_irqrestore(&wacom->remote_lock, flags);
+
+ for (i = 0; i < WACOM_MAX_REMOTES; i++) {
+ serial = data.remote[i].serial;
+ if (data.remote[i].connected) {
+
+ if (wacom_wac->serial[i] == serial)
+ continue;
+
+ if (wacom_wac->serial[i]) {
+ wacom_remote_destroy_attr_group(wacom,
+ wacom_wac->serial[i]);
+ }
+
+ /* A remote can pair more than once with an EKR,
+ * check to make sure this serial isn't already paired.
+ */
+ for (k = 0; k < WACOM_MAX_REMOTES; k++) {
+ if (wacom_wac->serial[k] == serial)
+ break;
+ }
+
+ if (k < WACOM_MAX_REMOTES) {
+ wacom_wac->serial[i] = serial;
+ continue;
+ }
+ wacom_remote_create_attr_group(wacom, serial, i);
+
+ } else if (wacom_wac->serial[i]) {
+ wacom_remote_destroy_attr_group(wacom,
+ wacom_wac->serial[i]);
+ }
+ }
+}
+
static int wacom_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
@@ -1931,6 +1991,17 @@ static int wacom_probe(struct hid_device *hdev,
mutex_init(&wacom->lock);
INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
INIT_WORK(&wacom->battery_work, wacom_battery_work);
+ INIT_WORK(&wacom->remote_work, wacom_remote_work);
+ spin_lock_init(&wacom->remote_lock);
+
+ if (kfifo_alloc(&wacom->remote_fifo,
+ 5 * sizeof(struct wacom_remote_data),
+ GFP_KERNEL)) {
+ dev_err(&hdev->dev,
+ "%s:failed allocating remote_fifo\n", __func__);
+ error = -ENOMEM;
+ goto fail_type;
+ }
/* ask for the report descriptor to be loaded by HID */
error = hid_parse(hdev);
@@ -1953,8 +2024,9 @@ static int wacom_probe(struct hid_device *hdev,
return 0;
-fail_type:
fail_parse:
+ kfifo_free(&wacom->remote_fifo);
+fail_type:
hid_set_drvdata(hdev, NULL);
return error;
}
@@ -1972,6 +2044,8 @@ static void wacom_remove(struct hid_device *hdev)
cancel_work_sync(&wacom->wireless_work);
cancel_work_sync(&wacom->battery_work);
+ cancel_work_sync(&wacom->remote_work);
+ kfifo_free(&wacom->remote_fifo);
kobject_put(wacom->remote_dir);
if (hdev->bus == BUS_BLUETOOTH)
device_remove_file(&hdev->dev, &dev_attr_speed);
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 932d3ee..d549929 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -823,52 +823,40 @@ static int wacom_remote_irq(struct wacom_wac *wacom_wac, size_t len)
return 1;
}
-static int wacom_remote_status_irq(struct wacom_wac *wacom_wac, size_t len)
+static void wacom_remote_status_irq(struct wacom_wac *wacom_wac, size_t len)
{
struct wacom *wacom = container_of(wacom_wac, struct wacom, wacom_wac);
unsigned char *data = wacom_wac->data;
- int i;
+ struct wacom_remote_data remote_data;
+ unsigned long flags;
+ int i, ret;
if (data[0] != WACOM_REPORT_DEVICE_LIST)
- return 0;
+ return;
+
+ memset(&remote_data, 0, sizeof(struct wacom_remote_data));
for (i = 0; i < WACOM_MAX_REMOTES; i++) {
int j = i * 6;
int serial = (data[j+6] << 16) + (data[j+5] << 8) + data[j+4];
bool connected = data[j+2];
- if (connected) {
- int k;
-
- if (wacom_wac->serial[i] == serial)
- continue;
-
- if (wacom_wac->serial[i]) {
- wacom_remote_destroy_attr_group(wacom,
- wacom_wac->serial[i]);
- }
-
- /* A remote can pair more than once with an EKR,
- * check to make sure this serial isn't already paired.
- */
- for (k = 0; k < WACOM_MAX_REMOTES; k++) {
- if (wacom_wac->serial[k] == serial)
- break;
- }
+ remote_data.remote[i].serial = serial;
+ remote_data.remote[i].connected = connected;
+ }
- if (k < WACOM_MAX_REMOTES) {
- wacom_wac->serial[i] = serial;
- continue;
- }
- wacom_remote_create_attr_group(wacom, serial, i);
+ spin_lock_irqsave(&wacom->remote_lock, flags);
- } else if (wacom_wac->serial[i]) {
- wacom_remote_destroy_attr_group(wacom,
- wacom_wac->serial[i]);
- }
+ ret = kfifo_in(&wacom->remote_fifo, &remote_data, sizeof(remote_data));
+ if (ret != sizeof(remote_data)) {
+ spin_unlock_irqrestore(&wacom->remote_lock, flags);
+ hid_err(wacom->hdev, "Can't queue Remote status event.\n");
+ return;
}
- return 0;
+ spin_unlock_irqrestore(&wacom->remote_lock, flags);
+
+ wacom_schedule_work(wacom_wac, WACOM_WORKER_REMOTE);
}
static int wacom_intuos_general(struct wacom_wac *wacom)
@@ -2310,8 +2298,9 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
break;
case REMOTE:
+ sync = false;
if (wacom_wac->data[0] == WACOM_REPORT_DEVICE_LIST)
- sync = wacom_remote_status_irq(wacom_wac, len);
+ wacom_remote_status_irq(wacom_wac, len);
else
sync = wacom_remote_irq(wacom_wac, len);
break;
diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
index d5b973d..c2c65b8 100644
--- a/drivers/hid/wacom_wac.h
+++ b/drivers/hid/wacom_wac.h
@@ -218,6 +218,13 @@ struct hid_data {
int num_received;
};
+struct wacom_remote_data {
+ struct {
+ u32 serial;
+ bool connected;
+ } remote[WACOM_MAX_REMOTES];
+};
+
struct wacom_wac {
char pen_name[WACOM_NAME_MAX];
char touch_name[WACOM_NAME_MAX];
--
2.5.5
next prev parent reply other threads:[~2016-07-13 16:08 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-13 16:05 [PATCH v2 00/30] HID: wacom: cleanup/EKR/LED Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 01/30] HID: wacom: actually report the battery level for wireless connected Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 02/30] HID: wacom: store the type in wacom->shared for INTUOSHT and INTUOSHT2 Benjamin Tissoires
2016-07-15 4:14 ` Ping Cheng
2016-07-18 14:54 ` Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 03/30] HID: wacom: remove cleanup of wacom->remote_dir from wacom_clean_inputs() Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 04/30] HID: wacom: untie leds from inputs Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 05/30] HID: wacom: use one work queue per task Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 06/30] HID: wacom: switch battery to devres Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 07/30] HID: wacom: switch inputs " Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 08/30] HID: wacom: put the managed resources in a group Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 09/30] HID: wacom: convert LEDs to devres Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 10/30] HID: wacom: use devm_kasprintf for allocating the name of the remote Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 11/30] HID: wacom: use devres to allocate driver data Benjamin Tissoires
2016-07-13 16:05 ` [PATCH v2 12/30] HID: wacom: devres manage the shared data too Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 13/30] HID: wacom: leds: dynamically allocate LED groups Benjamin Tissoires
2016-07-13 16:06 ` Benjamin Tissoires [this message]
2016-07-13 16:06 ` [PATCH v2 15/30] HID: wacom: EKR: have the wacom resources dynamically allocated Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 16/30] HID: wacom: rework fail path in probe() and parse_and_register() Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 17/30] HID: wacom: EKR: have proper allocator and destructor Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 18/30] HID: wacom: EKR: use devres groups to manage resources Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 19/30] HID: wacom: EKR: have one array of struct remotes instead of many arrays Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 20/30] HID: wacom: EKR: allocate one input node per remote Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 21/30] HID: wacom: EKR: have one power_supply " Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 22/30] HID: wacom: EKR: attach the power_supply on first connection Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 23/30] HID: wacom: leds: use the ledclass instead of custom made sysfs files Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 24/30] HID: wacom: leds: actually release the LEDs on disconnect Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 25/30] HID: wacom: leds: handle the switch of the LEDs directly in the kernel Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 26/30] HID: wacom: leds: make sure Cintiq 21UX2 and 24HD control the right LEDs Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 27/30] HID: wacom: leds: handle Cintiq 24HD leds buttons Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 28/30] HID: wacom: power_supply: mark the type as USB Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 29/30] HID: wacom: power_supply: remove ac information Benjamin Tissoires
2016-07-13 16:06 ` [PATCH v2 30/30] HID: wacom: power_supply: provide the actual model_name Benjamin Tissoires
2016-07-13 21:36 ` [PATCH v2 00/30] HID: wacom: cleanup/EKR/LED Aaron Armstrong Skomra
2016-08-01 23:17 ` Ping Cheng
2016-08-02 8:48 ` Jiri Kosina
2016-08-05 11:41 ` Jiri Kosina
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