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path: root/drivers/usb/serial/metro-usb.c
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Diffstat (limited to 'drivers/usb/serial/metro-usb.c')
-rw-r--r--drivers/usb/serial/metro-usb.c100
1 files changed, 73 insertions, 27 deletions
diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c
index 08d16e8c002d..d47eb06fe463 100644
--- a/drivers/usb/serial/metro-usb.c
+++ b/drivers/usb/serial/metro-usb.c
@@ -17,7 +17,6 @@
#include <linux/tty_flip.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
-#include <linux/errno.h>
#include <linux/uaccess.h>
#include <linux/usb/serial.h>
@@ -56,6 +55,47 @@ MODULE_DEVICE_TABLE(usb, id_table);
/* Input parameter constants. */
static bool debug;
+/* UNI-Directional mode commands for device configure */
+#define UNI_CMD_OPEN 0x80
+#define UNI_CMD_CLOSE 0xFF
+
+inline int metrousb_is_unidirectional_mode(struct usb_serial_port *port)
+{
+ __u16 product_id = le16_to_cpu(
+ port->serial->dev->descriptor.idProduct);
+
+ return product_id == FOCUS_PRODUCT_ID_UNI;
+}
+
+static int metrousb_send_unidirectional_cmd(u8 cmd, struct usb_serial_port *port)
+{
+ int ret;
+ int actual_len;
+ u8 *buffer_cmd = NULL;
+
+ if (!metrousb_is_unidirectional_mode(port))
+ return 0;
+
+ buffer_cmd = kzalloc(sizeof(cmd), GFP_KERNEL);
+ if (!buffer_cmd)
+ return -ENOMEM;
+
+ *buffer_cmd = cmd;
+
+ ret = usb_interrupt_msg(port->serial->dev,
+ usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress),
+ buffer_cmd, sizeof(cmd),
+ &actual_len, USB_CTRL_SET_TIMEOUT);
+
+ kfree(buffer_cmd);
+
+ if (ret < 0)
+ return ret;
+ else if (actual_len != sizeof(cmd))
+ return -EIO;
+ return 0;
+}
+
static void metrousb_read_int_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
@@ -78,12 +118,12 @@ static void metrousb_read_int_callback(struct urb *urb)
/* urb has been terminated. */
dev_dbg(&port->dev,
"%s - urb shutting down, error code=%d\n",
- __func__, result);
+ __func__, urb->status);
return;
default:
dev_dbg(&port->dev,
"%s - non-zero urb received, error code=%d\n",
- __func__, result);
+ __func__, urb->status);
goto exit;
}
@@ -91,7 +131,7 @@ static void metrousb_read_int_callback(struct urb *urb)
/* Set the data read from the usb port into the serial port buffer. */
tty = tty_port_tty_get(&port->port);
if (!tty) {
- dev_dbg(&port->dev, "%s - bad tty pointer - exiting\n",
+ dev_err(&port->dev, "%s - bad tty pointer - exiting\n",
__func__);
return;
}
@@ -121,7 +161,7 @@ static void metrousb_read_int_callback(struct urb *urb)
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
if (result)
- dev_dbg(&port->dev,
+ dev_err(&port->dev,
"%s - failed submitting interrupt in urb, error code=%d\n",
__func__, result);
}
@@ -131,11 +171,19 @@ exit:
/* Try to resubmit the urb. */
result = usb_submit_urb(urb, GFP_ATOMIC);
if (result)
- dev_dbg(&port->dev,
+ dev_err(&port->dev,
"%s - failed submitting interrupt in urb, error code=%d\n",
__func__, result);
}
+static void metrousb_write_int_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+
+ dev_warn(&port->dev, "%s not implemented yet.\n",
+ __func__);
+}
+
static void metrousb_cleanup(struct usb_serial_port *port)
{
dev_dbg(&port->dev, "%s\n", __func__);
@@ -146,6 +194,9 @@ static void metrousb_cleanup(struct usb_serial_port *port)
usb_unlink_urb(port->interrupt_in_urb);
usb_kill_urb(port->interrupt_in_urb);
}
+
+ /* Send deactivate cmd to device */
+ metrousb_send_unidirectional_cmd(UNI_CMD_CLOSE, port);
}
}
@@ -160,7 +211,7 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
/* Make sure the urb is initialized. */
if (!port->interrupt_in_urb) {
- dev_dbg(&port->dev, "%s - interrupt urb not initialized\n",
+ dev_err(&port->dev, "%s - interrupt urb not initialized\n",
__func__);
return -ENODEV;
}
@@ -171,14 +222,6 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
metro_priv->throttled = 0;
spin_unlock_irqrestore(&metro_priv->lock, flags);
- /*
- * Force low_latency on so that our tty_push actually forces the data
- * through, otherwise it is scheduled, and with high data rates (like
- * with OHCI) data can get lost.
- */
- if (tty)
- tty->low_latency = 1;
-
/* Clear the urb pipe. */
usb_clear_halt(serial->dev, port->interrupt_in_urb->pipe);
@@ -191,12 +234,21 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result) {
- dev_dbg(&port->dev,
+ dev_err(&port->dev,
"%s - failed submitting interrupt in urb, error code=%d\n",
__func__, result);
goto exit;
}
+ /* Send activate cmd to device */
+ result = metrousb_send_unidirectional_cmd(UNI_CMD_OPEN, port);
+ if (result) {
+ dev_err(&port->dev,
+ "%s - failed to configure device for port number=%d, error code=%d\n",
+ __func__, port->number, result);
+ goto exit;
+ }
+
dev_dbg(&port->dev, "%s - port open\n", __func__);
exit:
return result;
@@ -221,7 +273,7 @@ static int metrousb_set_modem_ctrl(struct usb_serial *serial, unsigned int contr
METROUSB_SET_REQUEST_TYPE, METROUSB_SET_MODEM_CTRL_REQUEST,
control_state, 0, NULL, 0, WDR_TIMEOUT);
if (retval < 0)
- dev_dbg(&serial->dev->dev,
+ dev_err(&serial->dev->dev,
"%s - set modem ctrl=0x%x failed, error code=%d\n",
__func__, mcr, retval);
@@ -354,29 +406,23 @@ static void metrousb_unthrottle(struct tty_struct *tty)
port->interrupt_in_urb->dev = port->serial->dev;
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
if (result)
- dev_dbg(tty->dev,
+ dev_err(tty->dev,
"failed submitting interrupt in urb error code=%d\n",
result);
}
-static struct usb_driver metrousb_driver = {
- .name = "metro-usb",
- .probe = usb_serial_probe,
- .disconnect = usb_serial_disconnect,
- .id_table = id_table
-};
-
static struct usb_serial_driver metrousb_device = {
.driver = {
.owner = THIS_MODULE,
.name = "metro-usb",
},
- .description = "Metrologic USB to serial converter.",
+ .description = "Metrologic USB to Serial",
.id_table = id_table,
.num_ports = 1,
.open = metrousb_open,
.close = metrousb_cleanup,
.read_int_callback = metrousb_read_int_callback,
+ .write_int_callback = metrousb_write_int_callback,
.attach = metrousb_startup,
.release = metrousb_shutdown,
.throttle = metrousb_throttle,
@@ -390,7 +436,7 @@ static struct usb_serial_driver * const serial_drivers[] = {
NULL,
};
-module_usb_serial_driver(metrousb_driver, serial_drivers);
+module_usb_serial_driver(serial_drivers, id_table);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Philip Nicastro");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-23 18:09:31 +0300