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USB: Serial: cypress_M8: Enable FRWD Dongle hidcom device

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The patch adds a new HIDCOM device and does not affect other devices
driven by the cypress_M8 module. Changes are:
- add VendorID ProductID to device tables
- skip unstable speed check because FRWD uses 115200bps
- skip reset at probe which is an issue workaround for this
particular device.

Signed-off-by: Robert Butora <robert.butora.fi@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Robert Butora 2013-05-31 18:09:51 +03:00 committed by Greg Kroah-Hartman
parent 077f5f1c23
commit 6529591e3e
2 changed files with 21 additions and 1 deletions
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18
drivers/usb/serial/cypress_m8.c
View file

@ -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;

4
drivers/usb/serial/cypress_m8.h
View file

@ -24,6 +24,10 @@
#define VENDOR_ID_CYPRESS 0x04b4
#define PRODUCT_ID_CYPHIDCOM 0x5500
/* FRWD Dongle - a GPS sports watch */
#define VENDOR_ID_FRWD 0x6737
#define PRODUCT_ID_CYPHIDCOM_FRWD 0x0001
/* Powercom UPS, chip CY7C63723 */
#define VENDOR_ID_POWERCOM 0x0d9f
#define PRODUCT_ID_UPS 0x0002