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Date: Mon, 23 Sep 2019 10:24:48 +0800
From: "Ji-Ze Hong (Peter Hong)" <hpeter@...il.com>
To: johan@...nel.org
Cc: gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, peter_hong@...tek.com.tw,
"Ji-Ze Hong (Peter Hong)" <hpeter+linux_kernel@...il.com>
Subject: [PATCH V2 6/7] USB: serial: f81232: Add generator for F81534A
The Fintek F81534A series is contains 1 HUB / 1 GPIO device / n UARTs,
but the UART is default disable and need enabled by GPIO device(2c42/16F8).
When F81534A plug to host, we can only see 1 HUB & 1 GPIO device and we
need write 0x8fff to GPIO device register F81534A_CMD_ENABLE_PORT(116h)
to enable all available serial ports.
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@...il.com>
---
drivers/usb/serial/f81232.c | 135 +++++++++++++++++++++++++++++++++++-
1 file changed, 134 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 01cb5a5ea1d2..82cc1e6cff62 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -36,6 +36,9 @@
{ USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \
{ USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */
+#define F81534A_CTRL_ID \
+ { USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */
+
static const struct usb_device_id id_table[] = {
F81232_ID,
{ } /* Terminating entry */
@@ -46,6 +49,11 @@ static const struct usb_device_id f81534a_id_table[] = {
{ } /* Terminating entry */
};
+static const struct usb_device_id f81534a_ctrl_id_table[] = {
+ F81534A_CTRL_ID,
+ { } /* Terminating entry */
+};
+
static const struct usb_device_id all_serial_id_table[] = {
F81232_ID,
F81534A_SERIES_ID,
@@ -105,6 +113,8 @@ MODULE_DEVICE_TABLE(usb, all_serial_id_table);
#define F81534A_GPIO_MODE1_OUTPUT BIT(1)
#define F81534A_GPIO_MODE0_OUTPUT BIT(0)
+#define F81534A_CMD_ENABLE_PORT 0x116
+
struct f81232_private {
struct mutex lock;
u8 modem_control;
@@ -853,6 +863,95 @@ static void f81232_lsr_worker(struct work_struct *work)
dev_warn(&port->dev, "read LSR failed: %d\n", status);
}
+static int f81534a_ctrl_set_register(struct usb_device *dev, u16 reg, u16 size,
+ void *val)
+{
+ int retry = F81534A_ACCESS_REG_RETRY;
+ int status;
+ u8 *tmp;
+
+ tmp = kmalloc(size, GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ memcpy(tmp, val, size);
+
+ while (retry--) {
+ status = usb_control_msg(dev,
+ usb_sndctrlpipe(dev, 0),
+ F81534A_REGISTER_REQUEST,
+ F81534A_SET_REGISTER,
+ reg,
+ 0,
+ tmp,
+ size,
+ USB_CTRL_SET_TIMEOUT);
+ if (status != size) {
+ status = usb_translate_errors(status);
+ if (status == -EIO)
+ continue;
+
+ status = -EIO;
+ } else {
+ status = 0;
+ }
+
+ break;
+ }
+
+ if (status) {
+ dev_err(&dev->dev, "set ctrl reg: %x, failed status: %d\n", reg,
+ status);
+ }
+
+ kfree(tmp);
+ return status;
+}
+
+static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+ unsigned char enable[2];
+ int status;
+
+ /* enable all available serial ports */
+ enable[0] = 0xff;
+ enable[1] = 0x8f;
+
+ status = f81534a_ctrl_set_register(dev, F81534A_CMD_ENABLE_PORT,
+ sizeof(enable), enable);
+ if (status)
+ dev_warn(&dev->dev, "set CMD_ENABLE_PORT failed: %d\n", status);
+
+ return status;
+}
+
+static int f81534a_ctrl_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+ int status;
+
+ status = f81534a_ctrl_enable_all_ports(intf);
+ if (status)
+ return status;
+
+ dev = usb_get_dev(dev);
+ return 0;
+}
+
+static void f81534a_ctrl_disconnect(struct usb_interface *intf)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+
+ usb_put_dev(dev);
+}
+
+static int f81534a_ctrl_resume(struct usb_interface *intf)
+{
+ return f81534a_ctrl_enable_all_ports(intf);
+}
+
static int f81232_port_probe(struct usb_serial_port *port)
{
struct f81232_private *priv;
@@ -980,7 +1079,41 @@ static struct usb_serial_driver * const serial_drivers[] = {
NULL,
};
-module_usb_serial_driver(serial_drivers, all_serial_id_table);
+static struct usb_driver f81534a_ctrl_driver = {
+ .name = "f81534a_ctrl",
+ .id_table = f81534a_ctrl_id_table,
+ .probe = f81534a_ctrl_probe,
+ .disconnect = f81534a_ctrl_disconnect,
+ .resume = f81534a_ctrl_resume,
+};
+
+static int __init f81232_init(void)
+{
+ int status;
+
+ status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE,
+ KBUILD_MODNAME);
+ if (status)
+ return status;
+
+ status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME,
+ all_serial_id_table);
+ if (status) {
+ usb_deregister(&f81534a_ctrl_driver);
+ return status;
+ }
+
+ return 0;
+}
+
+static void __exit f81232_exit(void)
+{
+ usb_serial_deregister_drivers(serial_drivers);
+ usb_deregister(&f81534a_ctrl_driver);
+}
+
+module_init(f81232_init);
+module_exit(f81232_exit);
MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver");
MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@...uxfoundation.org>");
--
2.17.1
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