Merge tag 'pm+acpi-3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...

[firefly-linux-kernel-4.4.55.git] / drivers / usb / serial / cypress_m8.c

diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index d341555d37d8bbe85f719d782049806522d2a066..082120198f870b2104d5230a5f1274803bc1074f 100644 (file)
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -65,6 +65,7 @@ static const struct usb_device_id id_table_earthmate[] = {
 static const struct usb_device_id id_table_cyphidcomrs232[] = {
        { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
        { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },
+       { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) },
        { }                                             /* Terminating entry */
 };
 
@@ -78,6 +79,7 @@ static const struct usb_device_id id_table_combined[] = {
        { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },
        { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
        { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },
+       { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) },
        { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },
        { }                                             /* Terminating entry */
 };
@@ -229,6 +231,12 @@ static struct usb_serial_driver * const serial_drivers[] = {
  * Cypress serial helper functions
  *****************************************************************************/
 
+/* FRWD Dongle hidcom needs to skip reset and speed checks */
+static inline bool is_frwd(struct usb_device *dev)
+{
+       return ((le16_to_cpu(dev->descriptor.idVendor) == VENDOR_ID_FRWD) &&
+               (le16_to_cpu(dev->descriptor.idProduct) == PRODUCT_ID_CYPHIDCOM_FRWD));
+}
 
 static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate)
 {
@@ -238,6 +246,10 @@ static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate)
        if (unstable_bauds)
                return new_rate;
 
+       /* FRWD Dongle uses 115200 bps */
+       if (is_frwd(port->serial->dev))
+               return new_rate;
+
        /*
         * The general purpose firmware for the Cypress M8 allows for
         * a maximum speed of 57600bps (I have no idea whether DeLorme
@@ -448,7 +460,11 @@ static int cypress_generic_port_probe(struct usb_serial_port *port)
                return -ENOMEM;
        }
 
-       usb_reset_configuration(serial->dev);
+       /* Skip reset for FRWD device. It is a workaound:
+          device hangs if it receives SET_CONFIGURE in Configured
+          state. */
+       if (!is_frwd(serial->dev))
+               usb_reset_configuration(serial->dev);
 
        priv->cmd_ctrl = 0;
        priv->line_control = 0;