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@@ -16,6 +16,14 @@
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* See http://geocities.com/i0xox0i for information on this driver and the
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* earthmate usb device.
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*
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+ * Lonnie Mendez <dignome@gmail.com>
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+ * 4-29-2005
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+ * Fixed problem where setting or retreiving the serial config would fail with
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+ * EPIPE. Removed CRTS toggling so the driver behaves more like other usbserial
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+ * adapters. Issued new interval of 1ms instead of the default 10ms. As a
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+ * result, transfer speed has been substantially increased. From avg. 850bps to
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+ * avg. 3300bps. initial termios has also been modified. Cleaned up code and
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+ * formatting issues so it is more readable. Replaced the C++ style comments.
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*
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* Lonnie Mendez <dignome@gmail.com>
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* 12-15-2004
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@@ -32,12 +40,6 @@
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* 10-2003
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* Driver first released.
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*
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- *
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- * Long Term TODO:
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- * Improve transfer speeds - both read/write are somewhat slow
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- * at this point.
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- * Improve debugging. Show modem line status with debug output and
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- * implement filtering for certain data as a module parameter.
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*/
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/* Thanks to Neil Whelchel for writing the first cypress m8 implementation for linux. */
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@@ -72,11 +74,12 @@
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static int debug;
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#endif
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static int stats;
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+static int interval;
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/*
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* Version Information
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*/
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-#define DRIVER_VERSION "v1.08"
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+#define DRIVER_VERSION "v1.09"
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#define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>"
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#define DRIVER_DESC "Cypress USB to Serial Driver"
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@@ -130,7 +133,6 @@ struct cypress_private {
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char prev_status, diff_status; /* used for TIOCMIWAIT */
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/* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */
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struct termios tmp_termios; /* stores the old termios settings */
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- char calledfromopen; /* used when issuing lines on open - fixes rts drop bug */
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};
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/* write buffer structure */
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@@ -168,10 +170,8 @@ static void cypress_buf_free(struct cypress_buf *cb);
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static void cypress_buf_clear(struct cypress_buf *cb);
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static unsigned int cypress_buf_data_avail(struct cypress_buf *cb);
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static unsigned int cypress_buf_space_avail(struct cypress_buf *cb);
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-static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf,
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- unsigned int count);
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-static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf,
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- unsigned int count);
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+static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, unsigned int count);
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+static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, unsigned int count);
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static struct usb_serial_device_type cypress_earthmate_device = {
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@@ -234,14 +234,13 @@ static struct usb_serial_device_type cypress_hidcom_device = {
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*****************************************************************************/
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-/* This function can either set or retreive the current serial line settings */
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+/* This function can either set or retrieve the current serial line settings */
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static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_mask, int data_bits, int stop_bits,
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int parity_enable, int parity_type, int reset, int cypress_request_type)
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{
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- int i, n_baud_rate = 0, retval = 0;
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+ int new_baudrate = 0, retval = 0, tries = 0;
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struct cypress_private *priv;
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- __u8 feature_buffer[5];
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- __u8 config;
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+ __u8 feature_buffer[8];
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unsigned long flags;
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dbg("%s", __FUNCTION__);
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@@ -256,7 +255,8 @@ static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_m
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* of 57600bps (I have no idea whether DeLorme chose to use the general purpose
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* firmware or not), if you need to modify this speed setting for your own
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* project please add your own chiptype and modify the code likewise. The
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- * Cypress HID->COM device will work successfully up to 115200bps.
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+ * Cypress HID->COM device will work successfully up to 115200bps (but the
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+ * actual throughput is around 3kBps).
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*/
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if (baud_mask != priv->cbr_mask) {
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dbg("%s - baud rate is changing", __FUNCTION__);
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@@ -265,109 +265,114 @@ static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_m
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* but are not used with NMEA and SiRF protocols */
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if ( (baud_mask == B300) || (baud_mask == B600) ) {
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- err("%s - failed setting baud rate, unsupported speed (default to 4800)",
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+ err("%s - failed setting baud rate, unsupported speed",
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__FUNCTION__);
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- n_baud_rate = 4800;
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- } else if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) {
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- err("%s - failed setting baud rate, unsupported speed (default to 4800)",
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+ new_baudrate = priv->baud_rate;
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+ } else if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
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+ err("%s - failed setting baud rate, unsupported speed",
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__FUNCTION__);
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- n_baud_rate = 4800;
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+ new_baudrate = priv->baud_rate;
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}
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} else if (priv->chiptype == CT_CYPHIDCOM) {
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- if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) {
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- err("%s - failed setting baud rate, unsupported speed (default to 4800)",
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+ if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
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+ err("%s - failed setting baud rate, unsupported speed",
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__FUNCTION__);
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- n_baud_rate = 4800;
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+ new_baudrate = priv->baud_rate;
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}
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} else if (priv->chiptype == CT_GENERIC) {
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- if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) {
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- err("%s - failed setting baud rate, unsupported speed (default to 4800)",
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+ if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
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+ err("%s - failed setting baud rate, unsupported speed",
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__FUNCTION__);
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- n_baud_rate = 4800;
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+ new_baudrate = priv->baud_rate;
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}
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} else {
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- info("%s - please define your chiptype, using 4800bps default", __FUNCTION__);
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- n_baud_rate = 4800;
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+ info("%s - please define your chiptype", __FUNCTION__);
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+ new_baudrate = priv->baud_rate;
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}
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} else { /* baud rate not changing, keep the old */
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- n_baud_rate = priv->baud_rate;
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+ new_baudrate = priv->baud_rate;
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}
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- dbg("%s - baud rate is being sent as %d", __FUNCTION__, n_baud_rate);
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-
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+ dbg("%s - baud rate is being sent as %d", __FUNCTION__, new_baudrate);
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- /*
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- * This algorithm accredited to Jiang Jay Zhang... thanks for all the help!
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- */
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- for (i = 0; i < 4; ++i) {
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- feature_buffer[i] = ( n_baud_rate >> (i*8) & 0xFF );
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- }
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+ memset(feature_buffer, 0, 8);
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+ /* fill the feature_buffer with new configuration */
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+ *((u_int32_t *)feature_buffer) = new_baudrate;
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- config = 0; // reset config byte
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- config |= data_bits; // assign data bits in 2 bit space ( max 3 )
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+ feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */
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/* 1 bit gap */
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- config |= (stop_bits << 3); // assign stop bits in 1 bit space
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- config |= (parity_enable << 4); // assign parity flag in 1 bit space
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- config |= (parity_type << 5); // assign parity type in 1 bit space
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+ feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */
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+ feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */
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+ feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */
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/* 1 bit gap */
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- config |= (reset << 7); // assign reset at end of byte, 1 bit space
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-
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- feature_buffer[4] = config;
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+ feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */
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dbg("%s - device is being sent this feature report:", __FUNCTION__);
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dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1],
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feature_buffer[2], feature_buffer[3], feature_buffer[4]);
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+ do {
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retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
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HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
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- 0x0300, 0, feature_buffer, 5, 500);
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+ 0x0300, 0, feature_buffer, 8, 500);
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+
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+ if (tries++ >= 3)
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+ break;
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- if (retval != 5)
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+ if (retval == EPIPE)
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+ usb_clear_halt(port->serial->dev, 0x00);
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+ } while (retval != 8 && retval != ENODEV);
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+
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+ if (retval != 8)
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err("%s - failed sending serial line settings - %d", __FUNCTION__, retval);
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else {
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spin_lock_irqsave(&priv->lock, flags);
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- priv->baud_rate = n_baud_rate;
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+ priv->baud_rate = new_baudrate;
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priv->cbr_mask = baud_mask;
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- priv->current_config = config;
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- ++priv->cmd_count;
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+ priv->current_config = feature_buffer[4];
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spin_unlock_irqrestore(&priv->lock, flags);
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}
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break;
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case CYPRESS_GET_CONFIG:
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dbg("%s - retreiving serial line settings", __FUNCTION__);
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- /* reset values in feature buffer */
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- memset(feature_buffer, 0, 5);
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+ /* set initial values in feature buffer */
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+ memset(feature_buffer, 0, 8);
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+ do {
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retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0),
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HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
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- 0x0300, 0, feature_buffer, 5, 500);
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+ 0x0300, 0, feature_buffer, 8, 500);
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+
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+ if (tries++ >= 3)
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+ break;
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+
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+ if (retval == EPIPE)
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+ usb_clear_halt(port->serial->dev, 0x00);
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+ } while (retval != 5 && retval != ENODEV);
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+
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if (retval != 5) {
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err("%s - failed to retreive serial line settings - %d", __FUNCTION__, retval);
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return retval;
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} else {
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spin_lock_irqsave(&priv->lock, flags);
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+
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/* store the config in one byte, and later use bit masks to check values */
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priv->current_config = feature_buffer[4];
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- /* reverse the process above to get the baud_mask value */
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- n_baud_rate = 0; // reset bits
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- for (i = 0; i < 4; ++i) {
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- n_baud_rate |= ( feature_buffer[i] << (i*8) );
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- }
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+ priv->baud_rate = *((u_int32_t *)feature_buffer);
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- priv->baud_rate = n_baud_rate;
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- if ( (priv->cbr_mask = rate_to_mask(n_baud_rate)) == 0x40)
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+ if ( (priv->cbr_mask = rate_to_mask(priv->baud_rate)) == 0x40)
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dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__);
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- ++priv->cmd_count;
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spin_unlock_irqrestore(&priv->lock, flags);
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}
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- break;
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- default:
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- err("%s - unsupported serial control command issued", __FUNCTION__);
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}
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+ spin_lock_irqsave(&priv->lock, flags);
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+ ++priv->cmd_count;
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+ spin_unlock_irqrestore(&priv->lock, flags);
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+
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return retval;
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} /* cypress_serial_control */
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-/* given a baud mask, it will return speed on success */
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+/* given a baud mask, it will return integer baud on success */
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static int mask_to_rate (unsigned mask)
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{
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int rate;
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@@ -438,11 +443,12 @@ static int generic_startup (struct usb_serial *serial)
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usb_reset_configuration (serial->dev);
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+ interval = 1;
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priv->cmd_ctrl = 0;
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priv->line_control = 0;
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priv->termios_initialized = 0;
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- priv->calledfromopen = 0;
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priv->rx_flags = 0;
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+ priv->cbr_mask = B300;
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usb_set_serial_port_data(serial->port[0], priv);
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return (0);
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@@ -513,7 +519,6 @@ static int cypress_open (struct usb_serial_port *port, struct file *filp)
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dbg("%s - port %d", __FUNCTION__, port->number);
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/* clear halts before open */
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- usb_clear_halt(serial->dev, 0x00);
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usb_clear_halt(serial->dev, 0x81);
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usb_clear_halt(serial->dev, 0x02);
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@@ -531,7 +536,6 @@ static int cypress_open (struct usb_serial_port *port, struct file *filp)
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/* raise both lines and set termios */
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spin_lock_irqsave(&priv->lock, flags);
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priv->line_control = CONTROL_DTR | CONTROL_RTS;
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- priv->calledfromopen = 1;
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priv->cmd_ctrl = 1;
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spin_unlock_irqrestore(&priv->lock, flags);
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result = cypress_write(port, NULL, 0);
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@@ -553,7 +557,7 @@ static int cypress_open (struct usb_serial_port *port, struct file *filp)
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usb_fill_int_urb(port->interrupt_in_urb, serial->dev,
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usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress),
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port->interrupt_in_urb->transfer_buffer, port->interrupt_in_urb->transfer_buffer_length,
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- cypress_read_int_callback, port, port->interrupt_in_urb->interval);
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+ cypress_read_int_callback, port, interval);
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result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
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if (result){
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@@ -680,12 +684,12 @@ static void cypress_send(struct usb_serial_port *port)
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spin_lock_irqsave(&priv->lock, flags);
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switch (port->interrupt_out_size) {
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case 32:
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- // this is for the CY7C64013...
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+ /* this is for the CY7C64013... */
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offset = 2;
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port->interrupt_out_buffer[0] = priv->line_control;
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break;
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case 8:
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- // this is for the CY7C63743...
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+ /* this is for the CY7C63743... */
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offset = 1;
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port->interrupt_out_buffer[0] = priv->line_control;
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break;
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@@ -738,6 +742,7 @@ send:
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port->interrupt_out_urb->transfer_buffer_length = actual_size;
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port->interrupt_out_urb->dev = port->serial->dev;
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+ port->interrupt_out_urb->interval = interval;
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result = usb_submit_urb (port->interrupt_out_urb, GFP_ATOMIC);
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if (result) {
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dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__,
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@@ -910,7 +915,7 @@ static void cypress_set_termios (struct usb_serial_port *port, struct termios *o
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unsigned cflag, iflag, baud_mask;
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unsigned long flags;
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__u8 oldlines;
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- int linechange;
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+ int linechange = 0;
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dbg("%s - port %d", __FUNCTION__, port->number);
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@@ -996,15 +1001,7 @@ static void cypress_set_termios (struct usb_serial_port *port, struct termios *o
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case B115200: dbg("%s - setting baud 115200bps", __FUNCTION__); break;
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default: dbg("%s - unknown masked baud rate", __FUNCTION__);
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}
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- priv->line_control |= CONTROL_DTR;
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-
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- /* toggle CRTSCTS? - don't do this if being called from cypress_open */
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- if (!priv->calledfromopen) {
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- if (cflag & CRTSCTS)
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- priv->line_control |= CONTROL_RTS;
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- else
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- priv->line_control &= ~CONTROL_RTS;
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- }
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+ priv->line_control = (CONTROL_DTR | CONTROL_RTS);
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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@@ -1014,8 +1011,6 @@ static void cypress_set_termios (struct usb_serial_port *port, struct termios *o
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cypress_serial_control(port, baud_mask, data_bits, stop_bits, parity_enable,
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parity_type, 0, CYPRESS_SET_CONFIG);
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- msleep(50); /* give some time between change and read (50ms) */
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-
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/* we perform a CYPRESS_GET_CONFIG so that the current settings are filled into the private structure
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* this should confirm that all is working if it returns what we just set */
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cypress_serial_control(port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG);
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@@ -1031,7 +1026,6 @@ static void cypress_set_termios (struct usb_serial_port *port, struct termios *o
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dbg("Using custom termios settings for a baud rate of 4800bps.");
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/* define custom termios settings for NMEA protocol */
|
|
|
|
|
|
-
|
|
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tty->termios->c_iflag /* input modes - */
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&= ~(IGNBRK /* disable ignore break */
|
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|
| BRKINT /* disable break causes interrupt */
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|
|
@@ -1052,23 +1046,16 @@ static void cypress_set_termios (struct usb_serial_port *port, struct termios *o
|
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|
| ISIG /* disable interrupt, quit, and suspend special characters */
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|
| IEXTEN); /* disable non-POSIX special characters */
|
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|
|
|
|
- } else if (priv->chiptype == CT_CYPHIDCOM) {
|
|
|
-
|
|
|
- // Software app handling it for device...
|
|
|
+ } /* CT_CYPHIDCOM: Application should handle this for device */
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|
|
|
|
- }
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|
|
linechange = (priv->line_control != oldlines);
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
|
|
/* if necessary, set lines */
|
|
|
- if (!priv->calledfromopen && linechange) {
|
|
|
+ if (linechange) {
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|
|
priv->cmd_ctrl = 1;
|
|
|
cypress_write(port, NULL, 0);
|
|
|
}
|
|
|
-
|
|
|
- if (priv->calledfromopen)
|
|
|
- priv->calledfromopen = 0;
|
|
|
-
|
|
|
} /* cypress_set_termios */
|
|
|
|
|
|
|
|
|
@@ -1164,7 +1151,7 @@ static void cypress_read_int_callback(struct urb *urb, struct pt_regs *regs)
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
switch(urb->actual_length) {
|
|
|
case 32:
|
|
|
- // This is for the CY7C64013...
|
|
|
+ /* This is for the CY7C64013... */
|
|
|
priv->current_status = data[0] & 0xF8;
|
|
|
bytes = data[1]+2;
|
|
|
i=2;
|
|
|
@@ -1172,7 +1159,7 @@ static void cypress_read_int_callback(struct urb *urb, struct pt_regs *regs)
|
|
|
havedata = 1;
|
|
|
break;
|
|
|
case 8:
|
|
|
- // This is for the CY7C63743...
|
|
|
+ /* This is for the CY7C63743... */
|
|
|
priv->current_status = data[0] & 0xF8;
|
|
|
bytes = (data[0] & 0x07)+1;
|
|
|
i=1;
|
|
|
@@ -1245,7 +1232,7 @@ continue_read:
|
|
|
port->interrupt_in_urb->transfer_buffer,
|
|
|
port->interrupt_in_urb->transfer_buffer_length,
|
|
|
cypress_read_int_callback, port,
|
|
|
- port->interrupt_in_urb->interval);
|
|
|
+ interval);
|
|
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
|
|
|
if (result)
|
|
|
dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
|
|
|
@@ -1274,6 +1261,8 @@ static void cypress_write_int_callback(struct urb *urb, struct pt_regs *regs)
|
|
|
dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
|
|
|
priv->write_urb_in_use = 0;
|
|
|
return;
|
|
|
+ case -EPIPE: /* no break needed */
|
|
|
+ usb_clear_halt(port->serial->dev, 0x02);
|
|
|
default:
|
|
|
/* error in the urb, so we have to resubmit it */
|
|
|
dbg("%s - Overflow in write", __FUNCTION__);
|
|
|
@@ -1535,3 +1524,5 @@ module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|
|
|
module_param(stats, bool, S_IRUGO | S_IWUSR);
|
|
|
MODULE_PARM_DESC(stats, "Enable statistics or not");
|
|
|
+module_param(interval, int, S_IRUGO | S_IWUSR);
|
|
|
+MODULE_PARM_DESC(interval, "Overrides interrupt interval");
|
Linus Torvalds