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From: Charles Yeh <charlesyeh522@gmail.com>
To: gregkh@linuxfoundation.org, johan@kernel.org, linux-usb@vger.kernel.org
Cc: charles-yeh@prolific.com.tw, Charles Yeh <charlesyeh522@gmail.com>
Subject: USB:Serial:pl2303:Add new Pull-UP Mode to support PL2303HXD(TYPE_HX)
Date: Tue, 15 Jan 2019 23:15:36 +0800	[thread overview]
Message-ID: <20190115151536.3084-1-charlesyeh522@gmail.com> (raw)

The Pull-UP mode only support PL2303HXD,it needs to use addition schematic design.

Signed-off-by: Charles Yeh <charlesyeh522@gmail.com>
---
 drivers/usb/serial/pl2303.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 98e7a5df0f6d..72544e5c928d 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -144,6 +144,9 @@ MODULE_DEVICE_TABLE(usb, id_table);
 #define UART_OVERRUN_ERROR		0x40
 #define UART_CTS			0x80
 
+#define TYPE_HX_PULLUP_MODE_DATA	0x08
+#define TYPE_HX_PULLUP_MODE_REG		0x09
+
 static void pl2303_set_break(struct usb_serial_port *port, bool enable);
 
 enum pl2303_type {
@@ -687,6 +690,15 @@ static void pl2303_set_termios(struct tty_struct *tty,
 		pl2303_vendor_write(serial, 0x0, 0x0);
 	}
 
+	pl2303_vendor_read(serial, 0x8484, buf);
+	pl2303_vendor_write(serial, 0x0404, TYPE_HX_PULLUP_MODE_REG);
+	pl2303_vendor_read(serial, 0x8484, buf);
+	pl2303_vendor_read(serial, 0x8383, buf);
+	if (*buf == TYPE_HX_PULLUP_MODE_DATA) {
+		pl2303_vendor_write(serial, 0x0, 0x31);
+		pl2303_vendor_write(serial, 0x1, 0x01);
+	}
+
 	kfree(buf);
 }
 

             reply	other threads:[~2019-01-15 15:15 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-15 15:15 Charles Yeh [this message]
2019-01-16 11:18 USB:Serial:pl2303:Add new Pull-UP Mode to support PL2303HXD(TYPE_HX) Johan Hovold
2019-01-17  6:19 Yeh.Charles [葉榮鑫]
2019-01-17 16:48 Johan Hovold

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