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[59.120.186.245]) by smtp.gmail.com with ESMTPSA id a18sm8342106pgm.25.2019.09.22.19.25.05 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 22 Sep 2019 19:25:05 -0700 (PDT) From: "Ji-Ze Hong (Peter Hong)" X-Google-Original-From: "Ji-Ze Hong (Peter Hong)" To: johan@kernel.org Cc: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, peter_hong@fintek.com.tw, "Ji-Ze Hong (Peter Hong)" Subject: [PATCH V2 5/7] USB: serial: f81232: Set F81534A serial port with RS232 mode Date: Mon, 23 Sep 2019 10:24:47 +0800 Message-Id: <20190923022449.10952-6-hpeter+linux_kernel@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190923022449.10952-1-hpeter+linux_kernel@gmail.com> References: <20190923022449.10952-1-hpeter+linux_kernel@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Fintek F81532A/534A/535/536 is USB-to-2/4/8/12 serial ports device and the serial ports are default disabled. Each port contains max 3 pins GPIO and the 3 pins are default pull high with input mode. When the serial port had activated (running probe()), we'll transform the 3 pins from GPIO function publicly to control Tranceiver privately use. We'll default set to 0/0/1 for control transceiver to RS232 mode. Otherwise, If the serial port is not active, the 3 pins is in GPIO mode and controlled by global GPIO device with VID/PID: 2c42/16f8. Signed-off-by: Ji-Ze Hong (Peter Hong) --- drivers/usb/serial/f81232.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index 36a17aedc2ae..01cb5a5ea1d2 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -96,6 +96,15 @@ MODULE_DEVICE_TABLE(usb, all_serial_id_table); #define F81534A_TRIGGER_MULTPILE_4X BIT(3) #define F81534A_FIFO_128BYTE (BIT(1) | BIT(0)) +/* Serial port self GPIO control, 2bytes [control&output data][input data] */ +#define F81534A_GPIO_REG 0x10e +#define F81534A_GPIO_MODE2_DIR BIT(6) /* 1: input, 0: output */ +#define F81534A_GPIO_MODE1_DIR BIT(5) +#define F81534A_GPIO_MODE0_DIR BIT(4) +#define F81534A_GPIO_MODE2_OUTPUT BIT(2) +#define F81534A_GPIO_MODE1_OUTPUT BIT(1) +#define F81534A_GPIO_MODE0_OUTPUT BIT(0) + struct f81232_private { struct mutex lock; u8 modem_control; @@ -866,6 +875,14 @@ static int f81232_port_probe(struct usb_serial_port *port) static int f81534a_port_probe(struct usb_serial_port *port) { + int status; + + /* tri-state with pull-high, default RS232 Mode */ + status = f81232_set_register(port, F81534A_GPIO_REG, + F81534A_GPIO_MODE2_DIR); + if (status) + return status; + return f81232_port_probe(port); } -- 2.17.1