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Subject[PATCH V2 4/7] USB: serial: f81232: Add F81534A support
Date
The Fintek F81532A/534A/535/536 is USB-to-2/4/8/12 serial ports device
and the serial port is default disabled when plugin computer.

The IC is contains devices as following:
1. HUB (all devices is connected with this hub)
2. GPIO/Control device. (enable serial port and control GPIOs)
3. serial port 1 to x (2/4/8/12)

It's most same with F81232, the UART device is difference as follow:
1. TX/RX bulk size is 128/512bytes
2. RX bulk layout change:
F81232: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]...
F81534A:[LEN][Data.....][LSR]

Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
---
drivers/usb/serial/f81232.c | 131 ++++++++++++++++++++++++++++++++++--
1 file changed, 127 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index e4db0aec9af0..36a17aedc2ae 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Fintek F81232 USB to serial adaptor driver
+ * Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver
*
* Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org)
* Copyright (C) 2012 Linux Foundation
@@ -21,11 +22,36 @@
#include <linux/usb/serial.h>
#include <linux/serial_reg.h>

+#define F81232_ID \
+ { USB_DEVICE(0x1934, 0x0706) } /* 1 port UART device */
+
+#define F81534A_SERIES_ID \
+ { USB_DEVICE(0x2c42, 0x1602) }, /* In-Box 2 port UART device */ \
+ { USB_DEVICE(0x2c42, 0x1604) }, /* In-Box 4 port UART device */ \
+ { USB_DEVICE(0x2c42, 0x1605) }, /* In-Box 8 port UART device */ \
+ { USB_DEVICE(0x2c42, 0x1606) }, /* In-Box 12 port UART device */ \
+ { USB_DEVICE(0x2c42, 0x1608) }, /* Non-Flash type */ \
+ { USB_DEVICE(0x2c42, 0x1632) }, /* 2 port UART device */ \
+ { USB_DEVICE(0x2c42, 0x1634) }, /* 4 port UART device */ \
+ { USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \
+ { USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */
+
static const struct usb_device_id id_table[] = {
- { USB_DEVICE(0x1934, 0x0706) },
+ F81232_ID,
+ { } /* Terminating entry */
+};
+
+static const struct usb_device_id f81534a_id_table[] = {
+ F81534A_SERIES_ID,
+ { } /* Terminating entry */
+};
+
+static const struct usb_device_id all_serial_id_table[] = {
+ F81232_ID,
+ F81534A_SERIES_ID,
{ } /* Terminating entry */
};
-MODULE_DEVICE_TABLE(usb, id_table);
+MODULE_DEVICE_TABLE(usb, all_serial_id_table);

/* Maximum baudrate for F81232 */
#define F81232_MAX_BAUDRATE 1500000
@@ -35,6 +61,10 @@ MODULE_DEVICE_TABLE(usb, id_table);
#define F81232_REGISTER_REQUEST 0xa0
#define F81232_GET_REGISTER 0xc0
#define F81232_SET_REGISTER 0x40
+#define F81534A_REGISTER_REQUEST F81232_REGISTER_REQUEST
+#define F81534A_GET_REGISTER F81232_GET_REGISTER
+#define F81534A_SET_REGISTER F81232_SET_REGISTER
+#define F81534A_ACCESS_REG_RETRY 2

#define SERIAL_BASE_ADDRESS 0x0120
#define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS)
@@ -61,6 +91,11 @@ MODULE_DEVICE_TABLE(usb, id_table);
#define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0))
#define F81232_CLK_MASK GENMASK(1, 0)

+#define F81534A_MODE_CONF_REG 0x107
+#define F81534A_TRIGGER_MASK GENMASK(3, 2)
+#define F81534A_TRIGGER_MULTPILE_4X BIT(3)
+#define F81534A_FIFO_128BYTE (BIT(1) | BIT(0))
+
struct f81232_private {
struct mutex lock;
u8 modem_control;
@@ -383,6 +418,46 @@ static void f81232_process_read_urb(struct urb *urb)
tty_flip_buffer_push(&port->port);
}

+static void f81534a_process_read_urb(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ unsigned char *data = urb->transfer_buffer;
+ char tty_flag;
+ unsigned int i;
+ u8 lsr;
+ u8 len;
+
+ if (urb->actual_length < 3) {
+ dev_err(&port->dev, "error actual_length: %d\n",
+ urb->actual_length);
+ return;
+ }
+
+ len = data[0];
+ if (len != urb->actual_length) {
+ dev_err(&port->dev, "len(%d) != urb->actual_length(%d)\n", len,
+ urb->actual_length);
+ return;
+ }
+
+ /* bulk-in data: [LEN][Data.....][LSR] */
+ lsr = data[len - 1];
+ tty_flag = f81232_handle_lsr(port, lsr);
+
+ if (port->port.console && port->sysrq) {
+ for (i = 1; i < urb->actual_length - 1; ++i)
+ if (!usb_serial_handle_sysrq_char(port, data[i]))
+ tty_insert_flip_char(&port->port, data[i],
+ tty_flag);
+ } else {
+ tty_insert_flip_string_fixed_flag(&port->port, &data[1],
+ tty_flag,
+ urb->actual_length - 2);
+ }
+
+ tty_flip_buffer_push(&port->port);
+}
+
static void f81232_break_ctl(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
@@ -666,6 +741,23 @@ static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
return 0;
}

+static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+ int status;
+ u8 val;
+
+ val = F81534A_TRIGGER_MULTPILE_4X | F81534A_FIFO_128BYTE;
+ status = f81232_set_mask_register(port, F81534A_MODE_CONF_REG,
+ F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE, val);
+ if (status) {
+ dev_err(&port->dev, "failed to set MODE_CONF_REG: %d\n",
+ status);
+ return status;
+ }
+
+ return f81232_open(tty, port);
+}
+
static void f81232_close(struct usb_serial_port *port)
{
struct f81232_private *port_priv = usb_get_serial_port_data(port);
@@ -772,6 +864,11 @@ static int f81232_port_probe(struct usb_serial_port *port)
return 0;
}

+static int f81534a_port_probe(struct usb_serial_port *port)
+{
+ return f81232_port_probe(port);
+}
+
static int f81232_suspend(struct usb_serial *serial, pm_message_t message)
{
struct usb_serial_port *port = serial->port[0];
@@ -835,14 +932,40 @@ static struct usb_serial_driver f81232_device = {
.resume = f81232_resume,
};

+static struct usb_serial_driver f81534a_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "f81534a",
+ },
+ .id_table = f81534a_id_table,
+ .num_ports = 1,
+ .open = f81534a_open,
+ .close = f81232_close,
+ .dtr_rts = f81232_dtr_rts,
+ .carrier_raised = f81232_carrier_raised,
+ .get_serial = f81232_get_serial_info,
+ .break_ctl = f81232_break_ctl,
+ .set_termios = f81232_set_termios,
+ .tiocmget = f81232_tiocmget,
+ .tiocmset = f81232_tiocmset,
+ .tiocmiwait = usb_serial_generic_tiocmiwait,
+ .tx_empty = f81232_tx_empty,
+ .process_read_urb = f81534a_process_read_urb,
+ .read_int_callback = f81232_read_int_callback,
+ .port_probe = f81534a_port_probe,
+ .suspend = f81232_suspend,
+ .resume = f81232_resume,
+};
+
static struct usb_serial_driver * const serial_drivers[] = {
&f81232_device,
+ &f81534a_device,
NULL,
};

-module_usb_serial_driver(serial_drivers, id_table);
+module_usb_serial_driver(serial_drivers, all_serial_id_table);

-MODULE_DESCRIPTION("Fintek F81232 USB to serial adaptor driver");
+MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver");
MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>");
MODULE_LICENSE("GPL v2");
--
2.17.1
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