On Thu, May 06, 2021 at 09:43:41AM +0200, Robert Wolters wrote:
> |Why: FTDI USB serial speed issue with SCS P4 Dragon short-wave modems, a
> custom baud-rate is required Solution: set special baud-rate by setting a
> custom divisor on 38400B Signed-off-by: Robert Wolters
> <robert@xxxxxxxxxxxxxxxxx> | ||--- ftdi_sio.c 2021-04-21 13:01:00.000000000
> +0200| ||+++ ftdi_sio.c 2021-04-26 18:53:00.819175707 +0200| ||@@ -97,6
> +97,7 @@| |||static int ftdi_8u2232c_probe(struct usb_serial *serial);|
> ||static void ftdi_USB_UIRT_setup(struct ftdi_private *priv);||||static void
> ftdi_HE_TIRA1_setup(struct ftdi_private *priv);| |+static void
> ftdi_SCS_DR7X00_setup(struct ftdi_private *priv);| ||static const struct
> ftdi_sio_quirk ftdi_jtag_quirk = {| |||.probe = ftdi_jtag_probe,| |||@@
> -122,6 +123,10 @@| |||.probe = ftdi_8u2232c_probe,| |||}; ||||+static const
> struct ftdi_sio_quirk ftdi_SCS_DR7X00_quirk = {| |||+ .port_probe =
> ftdi_SCS_DR7X00_setup,| |||+};| |||+| |||/*| ||* The 8U232AM has the same
> API as the sio except for:| |* - it can support MUCH higher baudrates; up
> to:| |@@ -157,8 +162,12 @@| |{ USB_DEVICE(FTDI_VID, FTDI_EV3CON_PID) },| |{
> USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_0_PID) },| |{ USB_DEVICE(FTDI_VID,
> FTDI_SCS_DEVICE_1_PID) },| |- { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_2_PID)
> },| |- { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_3_PID) },| |+ {
> USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_2_PID) ,| |+ .driver_info =
> (kernel_ulong_t)&ftdi_SCS_DR7X00_quirk },| |+ { USB_DEVICE(FTDI_VID,
> FTDI_SCS_DEVICE_3_PID) ,| |+ .driver_info =
> (kernel_ulong_t)&ftdi_SCS_DR7X00_quirk },| |{ USB_DEVICE(FTDI_VID,
> FTDI_SCS_DEVICE_4_PID) },| |{ USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_5_PID)
> },| |{ USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_6_PID) },| |@@ -2296,6 +2305,15
> @@| |priv->force_rtscts = 1;| |}| |+/* Setup for the SCS P4dragon DR-7X00
> devices, which require| |+ *hardwired baud-rate of 829440 (38400 gets mapped
> to 829440) */| |+static void ftdi_SCS_DR7X00_setup(struct ftdi_private
> *priv)| |+{| |+ priv->flags |= ASYNC_SPD_CUST;| |+ priv->custom_divisor =
> 29;| |+ priv->force_baud = 38400;| |+}| |+| |||||/*| |* Module parameter to
> control latency timer for NDI FTDI-based USB devices.| |* If this value is
> not set in /etc/modprobe.d/ its value will be set|
>
I think something went wrong with your email client :(
