[PATCH V1 1/6] USB: serial: f81232: Add F81534A support
From: Ji-Ze Hong (Peter Hong)
Date: Wed Jun 05 2019 - 22:58:45 EST
The Fintek F81532A/534A/535/536 is USB-to-2/4/8/12 serial ports device.
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@xxxxxxxxx>
---
drivers/usb/serial/f81232.c | 153 +++++++++++++++++++++++++++++++++++++++++---
1 file changed, 144 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 43fa1f0716b7..84efcc66aa56 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@xxxxxxxxxxxxxxxxxxx)
* Copyright (C) 2012 Linux Foundation
@@ -22,7 +23,20 @@
#include <linux/serial_reg.h>
static const struct usb_device_id id_table[] = {
+ /* F81232 */
{ USB_DEVICE(0x1934, 0x0706) },
+
+ /* F81532A/534A/535/536 */
+ { 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 */
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);
@@ -61,15 +75,25 @@ 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))
+
+#define F81232_F81232_TYPE 1
+#define F81232_F81534A_TYPE 2
+
struct f81232_private {
struct mutex lock;
u8 modem_control;
u8 modem_status;
u8 shadow_lcr;
+ u8 device_type;
speed_t baud_base;
struct work_struct lsr_work;
struct work_struct interrupt_work;
struct usb_serial_port *port;
+ void (*process_read_urb)(struct urb *urb);
};
static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 };
@@ -376,6 +400,78 @@ 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;
+ struct f81232_private *priv = usb_get_serial_port_data(port);
+ unsigned char *data = urb->transfer_buffer;
+ char tty_flag;
+ unsigned int i;
+ u8 lsr;
+ u8 len;
+
+ if (urb->status) {
+ dev_err(&port->dev, "urb->status: %d\n", urb->status);
+ return;
+ }
+
+ if (!urb->actual_length) {
+ dev_err(&port->dev, "urb->actual_length == 0\n");
+ 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] */
+ tty_flag = TTY_NORMAL;
+
+ lsr = data[len - 1];
+ if (lsr & UART_LSR_BRK_ERROR_BITS) {
+ if (lsr & UART_LSR_BI) {
+ tty_flag = TTY_BREAK;
+ port->icount.brk++;
+ usb_serial_handle_break(port);
+ } else if (lsr & UART_LSR_PE) {
+ tty_flag = TTY_PARITY;
+ port->icount.parity++;
+ } else if (lsr & UART_LSR_FE) {
+ tty_flag = TTY_FRAME;
+ port->icount.frame++;
+ }
+
+ if (lsr & UART_LSR_OE) {
+ port->icount.overrun++;
+ schedule_work(&priv->lsr_work);
+ tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
+ }
+ }
+
+ for (i = 1; i < urb->actual_length - 1; i++) {
+ if (port->port.console && port->sysrq) {
+ if (usb_serial_handle_sysrq_char(port, data[i]))
+ continue;
+ }
+
+ tty_insert_flip_char(&port->port, data[i], tty_flag);
+ }
+
+ tty_flip_buffer_push(&port->port);
+}
+
+static void f81232_read_urb_proxy(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ struct f81232_private *priv = usb_get_serial_port_data(port);
+
+ if (priv->process_read_urb)
+ priv->process_read_urb(urb);
+}
+
static void f81232_break_ctl(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
@@ -487,13 +583,28 @@ static void f81232_set_baudrate(struct tty_struct *tty,
static int f81232_port_enable(struct usb_serial_port *port)
{
+ struct f81232_private *port_priv = usb_get_serial_port_data(port);
u8 val;
int status;
- /* fifo on, trigger8, clear TX/RX*/
- val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT;
+ if (port_priv->device_type != F81232_F81232_TYPE) {
+ 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;
+ }
+
+ val = UART_FCR_TRIGGER_14;
+ } else {
+ val = UART_FCR_TRIGGER_8;
+ }
+ /* fifo on, clear TX/RX */
+ val |= UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val);
if (status) {
dev_err(&port->dev, "%s failed to set FCR: %d\n",
@@ -631,6 +742,16 @@ static int f81232_tiocmset(struct tty_struct *tty,
return f81232_set_mctrl(port, set, clear);
}
+static void f81232_detect_device_type(struct usb_serial_port *port)
+{
+ struct f81232_private *port_priv = usb_get_serial_port_data(port);
+
+ if (port->serial->dev->descriptor.idProduct == 0x0706)
+ port_priv->device_type = F81232_F81232_TYPE;
+ else
+ port_priv->device_type = F81232_F81534A_TYPE;
+}
+
static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
{
int result;
@@ -731,6 +852,7 @@ static void f81232_lsr_worker(struct work_struct *work)
static int f81232_port_probe(struct usb_serial_port *port)
{
struct f81232_private *priv;
+ int status = 0;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
@@ -741,11 +863,26 @@ static int f81232_port_probe(struct usb_serial_port *port)
INIT_WORK(&priv->lsr_work, f81232_lsr_worker);
usb_set_serial_port_data(port, priv);
+ f81232_detect_device_type(port);
port->port.drain_delay = 256;
priv->port = port;
- return 0;
+ switch (priv->device_type) {
+ case F81232_F81534A_TYPE:
+ priv->process_read_urb = f81534a_process_read_urb;
+ break;
+
+ case F81232_F81232_TYPE:
+ priv->process_read_urb = f81232_process_read_urb;
+ break;
+
+ default:
+ status = -ENODEV;
+ break;
+ }
+
+ return status;
}
static int f81232_port_remove(struct usb_serial_port *port)
@@ -797,12 +934,10 @@ static int f81232_resume(struct usb_serial *serial)
static struct usb_serial_driver f81232_device = {
.driver = {
.owner = THIS_MODULE,
- .name = "f81232",
+ .name = "f81232/f81534a",
},
.id_table = id_table,
.num_ports = 1,
- .bulk_in_size = 256,
- .bulk_out_size = 256,
.open = f81232_open,
.close = f81232_close,
.dtr_rts = f81232_dtr_rts,
@@ -813,7 +948,7 @@ static struct usb_serial_driver f81232_device = {
.tiocmget = f81232_tiocmget,
.tiocmset = f81232_tiocmset,
.tiocmiwait = usb_serial_generic_tiocmiwait,
- .process_read_urb = f81232_process_read_urb,
+ .process_read_urb = f81232_read_urb_proxy,
.read_int_callback = f81232_read_int_callback,
.port_probe = f81232_port_probe,
.port_remove = f81232_port_remove,
@@ -828,7 +963,7 @@ static struct usb_serial_driver * const serial_drivers[] = {
module_usb_serial_driver(serial_drivers, 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@xxxxxxxxxxxxxxxxxxx>");
MODULE_AUTHOR("Peter Hong <peter_hong@xxxxxxxxxxxxx>");
MODULE_LICENSE("GPL v2");
--
2.7.4