From: HungNien Chen <hn.chen@xxxxxxxxxxxxxxx>
Weida's device can get a quirk value by the quirk function.
Base on the quirk value, set_power function will send a command
to wake up the device before send the PWR_ON command.
Signed-off-by: HungNien Chen <hn.chen@xxxxxxxxxxxxxxx>
---
drivers/hid/hid-ids.h | 5 +++++
drivers/hid/i2c-hid/i2c-hid.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 6cfb5ca..787afdf 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1033,6 +1033,11 @@
#define USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH 0x0500
#define USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET 0x0502
+#define USB_VENDOR_ID_WEIDA 0x2575
+#define USB_DEVICE_ID_WEIDA_8756 0x8756
+#define USB_DEVICE_ID_WEIDA_8752 0xC300
+#define USB_DEVICE_ID_WEIDA_8755 0xC301
+
#define USB_VENDOR_ID_WISEGROUP 0x0925
#define USB_DEVICE_ID_SMARTJOY_PLUS 0x0005
#define USB_DEVICE_ID_SUPER_JOY_BOX_3 0x8888
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index b3ec4f2..7a9b100 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -41,6 +41,11 @@
#include <linux/i2c/i2c-hid.h>
+#include "../hid-ids.h"
+
+/* quirks to control the device */
+#define I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV (1 << 0)
+
/* flags */
#define I2C_HID_STARTED 0
#define I2C_HID_RESET_PENDING 1
@@ -143,6 +148,7 @@ struct i2c_hid {
char *argsbuf; /* Command arguments buffer */
unsigned long flags; /* device flags */
+ unsigned long quirks; /* Various quirks */
wait_queue_head_t wait; /* For waiting the interrupt */
struct gpio_desc *desc;
@@ -154,6 +160,25 @@ struct i2c_hid {
struct mutex reset_lock;
};
+/*
+ * i2c_hid_lookup_quirk: return any quirks associated with a I2C HID device
+ * @idVendor: the 16-bit vendor ID
+ * @idProduct: the 16-bit product ID
+ *
+ * Returns: a u32 quirks value.
+ */
+static u32 i2c_hid_lookup_quirk(const u16 idVendor, const u16 idProduct)
+{
+ u32 quirks = 0;
+
+ /* Weida devices check here */
+ if (idVendor == USB_VENDOR_ID_WEIDA &&
+ idProduct >= USB_DEVICE_ID_WEIDA_8752)
+ return I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV;
+
+ return quirks;
+}
+
static int __i2c_hid_command(struct i2c_client *client,
const struct i2c_hid_cmd *command, u8 reportID,
u8 reportType, u8 *args, int args_len,
@@ -346,6 +371,11 @@ static int i2c_hid_set_power(struct i2c_client *client, int power_state)
i2c_hid_dbg(ihid, "%s\n", __func__);
+ /* Some devices require to send a command to wakeup first */
+ if (power_state == I2C_HID_PWR_ON &&
+ ihid->quirks & I2C_HID_QUIRK_SET_PWR_WAKEUP_DEV)
+ i2c_hid_command(client, &hid_set_power_cmd, NULL, 0);
+
ret = __i2c_hid_command(client, &hid_set_power_cmd, power_state,
0, NULL, 0, NULL, 0);
if (ret)
@@ -661,6 +691,8 @@ static int i2c_hid_parse(struct hid_device *hid)
i2c_hid_dbg(ihid, "entering %s\n", __func__);
+ ihid->quirks = i2c_hid_lookup_quirk(hid->vendor, hid->product);
+
rsize = le16_to_cpu(hdesc->wReportDescLength);
if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
dbg_hid("weird size of report descriptor (%u)\n", rsize);
--
1.9.1
--
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