Force F81534A series UARTs with RS232 mode in port_probe().
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@xxxxxxxxx>
---
drivers/usb/serial/f81232.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 84efcc66aa56..75dfc0b9ef30 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -83,12 +83,22 @@ MODULE_DEVICE_TABLE(usb, id_table);
#define F81232_F81232_TYPE 1
#define F81232_F81534A_TYPE 2
+/* 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;
u8 modem_status;
u8 shadow_lcr;
u8 device_type;
+ u8 gpio_mode;
speed_t baud_base;
struct work_struct lsr_work;
struct work_struct interrupt_work;
@@ -871,6 +881,11 @@ static int f81232_port_probe(struct usb_serial_port *port)
switch (priv->device_type) {
case F81232_F81534A_TYPE:
priv->process_read_urb = f81534a_process_read_urb;
+ priv->gpio_mode = F81534A_GPIO_MODE2_DIR;
+
+ /* tri-state with pull-high, default RS232 Mode */
+ status = f81232_set_register(port, F81534A_GPIO_REG,
+ priv->gpio_mode);
break;
case F81232_F81232_TYPE:
--
2.7.4
