diff options
| author |   Johan Hovold <johan@kernel.org> | 2022-09-11 16:02:14 +0200 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2022-09-15 08:06:04 +0200 |
| commit | 4d50f4fc67d6e903266ff3769d655729a070d490 (patch) | |
| tree | 921c4e260f746743e86a9d13cce23cde447e1515 /drivers/usb/serial/ftdi_sio.c | |
| parent | USB: serial: ftdi_sio: clean up baudrate request (diff) | |
| download | linux-dev-4d50f4fc67d6e903266ff3769d655729a070d490.tar.xz linux-dev-4d50f4fc67d6e903266ff3769d655729a070d490.zip | |
USB: serial: ftdi_sio: assume hi-speed type
In preparation for adding further Hi-Speed types, assume a 120 MHz clock
and set the channel index by default and instead override these values
as needed for legacy types.
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index af0ed7f954ec..40343ab0ef03 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1551,13 +1551,15 @@ static int ftdi_determine_type(struct usb_serial_port *port) version = le16_to_cpu(udev->descriptor.bcdDevice); ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber; - priv->baud_base = 48000000 / 2; - priv->channel = 0; + /* Assume Hi-Speed type */ + priv->baud_base = 120000000 / 2; + priv->channel = CHANNEL_A + ifnum; switch (version) { case 0x200: priv->chip_type = FT232A; - + priv->baud_base = 48000000 / 2; + priv->channel = 0; /* * FT232B devices have a bug where bcdDevice gets set to 0x200 * when iSerialNumber is 0. Assume it is an FT232B in case the @@ -1570,37 +1572,36 @@ static int ftdi_determine_type(struct usb_serial_port *port) break; case 0x400: priv->chip_type = FT232B; + priv->baud_base = 48000000 / 2; + priv->channel = 0; break; case 0x500: priv->chip_type = FT2232C; - priv->channel = CHANNEL_A + ifnum; + priv->baud_base = 48000000 / 2; break; case 0x600: priv->chip_type = FT232R; + priv->baud_base = 48000000 / 2; + priv->channel = 0; break; case 0x700: priv->chip_type = FT2232H; - priv->channel = CHANNEL_A + ifnum; - priv->baud_base = 120000000 / 2; break; case 0x800: priv->chip_type = FT4232H; - priv->channel = CHANNEL_A + ifnum; - priv->baud_base = 120000000 / 2; break; case 0x900: priv->chip_type = FT232H; - priv->channel = CHANNEL_A + ifnum; - priv->baud_base = 120000000 / 2; break; case 0x1000: priv->chip_type = FTX; - priv->channel = CHANNEL_A + ifnum; + priv->baud_base = 48000000 / 2; break; default: if (version < 0x200) { priv->chip_type = SIO; priv->baud_base = 12000000 / 16; + priv->channel = 0; } else { dev_err(&port->dev, "unknown device type: 0x%02x\n", version); return -ENODEV; |