Hi Johan & Greg,
Do you have received a new patch"[PATCH] [v2]USB:serial:pl2303:add new
Pull-Up mode to support PL2303HXD (TYPE_HX)"?
If you have received a new patch, has the content been confirmed?
Or tell me where needs to be modified.
Charles Yeh <charlesyeh522@xxxxxxxxx> 於 2019年2月12日 週二 下午8:51寫道：
>
> Pull-Up mode is disabled (default) in PL2303HXD.
> When the Pull-Up mode is activated, its TX/DTR/RTS external resistor will start the output function.
>
> How to enable the Pull-Up mode of PL2303HXD
> 1.TX/DTR/RTS external resistor is required on the circuit diagram (PCB)
> 2.PL2303HXD OTP needs to be programmed to have a Pull-Up mode through 6.5V (USB_VCC,5V->6.5V)
>
> The patch driver will read whether the PL2303HXD has a Pull-Up mode,and if so,
> it will be set to enable Pull-Up mode function.
>
> Signed-off-by: Charles Yeh <charlesyeh522@xxxxxxxxx>
> ---
> drivers/usb/serial/pl2303.c | 24 ++++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
> index bb3f9aa4a909..e5d00e4a495d 100644
> --- a/drivers/usb/serial/pl2303.c
> +++ b/drivers/usb/serial/pl2303.c
> @@ -145,6 +145,16 @@ MODULE_DEVICE_TABLE(usb, id_table);
> #define UART_OVERRUN_ERROR 0x40
> #define UART_CTS 0x80
>
> +#define TYPE_HX_READ_PUM_STATUS_REG 0x8484
> +#define TYPE_HX_READ_PUM_ADD 0x0404
> +#define TYPE_HX_READ_PUM_DATA_REG 0x8383
> +#define TYPE_HX_PULLUP_MODE_DATA 0x08
> +#define TYPE_HX_PULLUP_MODE_REG 0x09
> +#define TYPE_HX_PUM_ADD0 0x00
> +#define TYPE_HX_PUM_DATA0 0x31
> +#define TYPE_HX_PUM_ADD1 0x01
> +#define TYPE_HX_PUM_DATA1 0x08
> +
> static void pl2303_set_break(struct usb_serial_port *port, bool enable);
>
> enum pl2303_type {
> @@ -688,6 +698,20 @@ static void pl2303_set_termios(struct tty_struct *tty,
> pl2303_vendor_write(serial, 0x0, 0x0);
> }
>
> + if (spriv->type == &pl2303_type_data[TYPE_HX]) {
> + pl2303_vendor_read(serial, TYPE_HX_READ_PUM_STATUS_REG, buf);
> + pl2303_vendor_write(serial, TYPE_HX_READ_PUM_ADD,
> + TYPE_HX_PULLUP_MODE_REG);
> + pl2303_vendor_read(serial, TYPE_HX_READ_PUM_STATUS_REG, buf);
> + pl2303_vendor_read(serial, TYPE_HX_READ_PUM_DATA_REG, buf);
> + if (*buf == TYPE_HX_PULLUP_MODE_DATA) {
> + pl2303_vendor_write(serial, TYPE_HX_PUM_ADD0,
> + TYPE_HX_PUM_DATA0);
> + pl2303_vendor_write(serial, TYPE_HX_PUM_ADD1,
> + TYPE_HX_PUM_DATA1);
> + }
> + }
> +
> kfree(buf);
> }
>
> --
> 2.19.1
>
