mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1532 lines
42 KiB
1532 lines
42 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* Digi AccelePort USB-4 and USB-2 Serial Converters |
|
* |
|
* Copyright 2000 by Digi International |
|
* |
|
* Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's |
|
* usb-serial driver. |
|
* |
|
* Peter Berger ([email protected]) |
|
* Al Borchers ([email protected]) |
|
*/ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/errno.h> |
|
#include <linux/slab.h> |
|
#include <linux/tty.h> |
|
#include <linux/tty_driver.h> |
|
#include <linux/tty_flip.h> |
|
#include <linux/module.h> |
|
#include <linux/spinlock.h> |
|
#include <linux/uaccess.h> |
|
#include <linux/usb.h> |
|
#include <linux/wait.h> |
|
#include <linux/sched/signal.h> |
|
#include <linux/usb/serial.h> |
|
|
|
/* Defines */ |
|
|
|
#define DRIVER_AUTHOR "Peter Berger <[email protected]>, Al Borchers <[email protected]>" |
|
#define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver" |
|
|
|
/* port output buffer length -- must be <= transfer buffer length - 2 */ |
|
/* so we can be sure to send the full buffer in one urb */ |
|
#define DIGI_OUT_BUF_SIZE 8 |
|
|
|
/* port input buffer length -- must be >= transfer buffer length - 3 */ |
|
/* so we can be sure to hold at least one full buffer from one urb */ |
|
#define DIGI_IN_BUF_SIZE 64 |
|
|
|
/* retry timeout while sleeping */ |
|
#define DIGI_RETRY_TIMEOUT (HZ/10) |
|
|
|
/* timeout while waiting for tty output to drain in close */ |
|
/* this delay is used twice in close, so the total delay could */ |
|
/* be twice this value */ |
|
#define DIGI_CLOSE_TIMEOUT (5*HZ) |
|
|
|
|
|
/* AccelePort USB Defines */ |
|
|
|
/* ids */ |
|
#define DIGI_VENDOR_ID 0x05c5 |
|
#define DIGI_2_ID 0x0002 /* USB-2 */ |
|
#define DIGI_4_ID 0x0004 /* USB-4 */ |
|
|
|
/* commands |
|
* "INB": can be used on the in-band endpoint |
|
* "OOB": can be used on the out-of-band endpoint |
|
*/ |
|
#define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */ |
|
#define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */ |
|
#define DIGI_CMD_SET_PARITY 2 /* INB, OOB */ |
|
#define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */ |
|
#define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */ |
|
#define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */ |
|
#define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */ |
|
#define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */ |
|
#define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */ |
|
#define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */ |
|
#define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */ |
|
#define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */ |
|
#define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */ |
|
#define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */ |
|
#define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */ |
|
#define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */ |
|
#define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */ |
|
#define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */ |
|
#define DIGI_CMD_SEND_DATA 18 /* INB */ |
|
#define DIGI_CMD_RECEIVE_DATA 19 /* INB */ |
|
#define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */ |
|
#define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */ |
|
|
|
/* baud rates */ |
|
#define DIGI_BAUD_50 0 |
|
#define DIGI_BAUD_75 1 |
|
#define DIGI_BAUD_110 2 |
|
#define DIGI_BAUD_150 3 |
|
#define DIGI_BAUD_200 4 |
|
#define DIGI_BAUD_300 5 |
|
#define DIGI_BAUD_600 6 |
|
#define DIGI_BAUD_1200 7 |
|
#define DIGI_BAUD_1800 8 |
|
#define DIGI_BAUD_2400 9 |
|
#define DIGI_BAUD_4800 10 |
|
#define DIGI_BAUD_7200 11 |
|
#define DIGI_BAUD_9600 12 |
|
#define DIGI_BAUD_14400 13 |
|
#define DIGI_BAUD_19200 14 |
|
#define DIGI_BAUD_28800 15 |
|
#define DIGI_BAUD_38400 16 |
|
#define DIGI_BAUD_57600 17 |
|
#define DIGI_BAUD_76800 18 |
|
#define DIGI_BAUD_115200 19 |
|
#define DIGI_BAUD_153600 20 |
|
#define DIGI_BAUD_230400 21 |
|
#define DIGI_BAUD_460800 22 |
|
|
|
/* arguments */ |
|
#define DIGI_WORD_SIZE_5 0 |
|
#define DIGI_WORD_SIZE_6 1 |
|
#define DIGI_WORD_SIZE_7 2 |
|
#define DIGI_WORD_SIZE_8 3 |
|
|
|
#define DIGI_PARITY_NONE 0 |
|
#define DIGI_PARITY_ODD 1 |
|
#define DIGI_PARITY_EVEN 2 |
|
#define DIGI_PARITY_MARK 3 |
|
#define DIGI_PARITY_SPACE 4 |
|
|
|
#define DIGI_STOP_BITS_1 0 |
|
#define DIGI_STOP_BITS_2 1 |
|
|
|
#define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1 |
|
#define DIGI_INPUT_FLOW_CONTROL_RTS 2 |
|
#define DIGI_INPUT_FLOW_CONTROL_DTR 4 |
|
|
|
#define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1 |
|
#define DIGI_OUTPUT_FLOW_CONTROL_CTS 2 |
|
#define DIGI_OUTPUT_FLOW_CONTROL_DSR 4 |
|
|
|
#define DIGI_DTR_INACTIVE 0 |
|
#define DIGI_DTR_ACTIVE 1 |
|
#define DIGI_DTR_INPUT_FLOW_CONTROL 2 |
|
|
|
#define DIGI_RTS_INACTIVE 0 |
|
#define DIGI_RTS_ACTIVE 1 |
|
#define DIGI_RTS_INPUT_FLOW_CONTROL 2 |
|
#define DIGI_RTS_TOGGLE 3 |
|
|
|
#define DIGI_FLUSH_TX 1 |
|
#define DIGI_FLUSH_RX 2 |
|
#define DIGI_RESUME_TX 4 /* clears xoff condition */ |
|
|
|
#define DIGI_TRANSMIT_NOT_IDLE 0 |
|
#define DIGI_TRANSMIT_IDLE 1 |
|
|
|
#define DIGI_DISABLE 0 |
|
#define DIGI_ENABLE 1 |
|
|
|
#define DIGI_DEASSERT 0 |
|
#define DIGI_ASSERT 1 |
|
|
|
/* in band status codes */ |
|
#define DIGI_OVERRUN_ERROR 4 |
|
#define DIGI_PARITY_ERROR 8 |
|
#define DIGI_FRAMING_ERROR 16 |
|
#define DIGI_BREAK_ERROR 32 |
|
|
|
/* out of band status */ |
|
#define DIGI_NO_ERROR 0 |
|
#define DIGI_BAD_FIRST_PARAMETER 1 |
|
#define DIGI_BAD_SECOND_PARAMETER 2 |
|
#define DIGI_INVALID_LINE 3 |
|
#define DIGI_INVALID_OPCODE 4 |
|
|
|
/* input signals */ |
|
#define DIGI_READ_INPUT_SIGNALS_SLOT 1 |
|
#define DIGI_READ_INPUT_SIGNALS_ERR 2 |
|
#define DIGI_READ_INPUT_SIGNALS_BUSY 4 |
|
#define DIGI_READ_INPUT_SIGNALS_PE 8 |
|
#define DIGI_READ_INPUT_SIGNALS_CTS 16 |
|
#define DIGI_READ_INPUT_SIGNALS_DSR 32 |
|
#define DIGI_READ_INPUT_SIGNALS_RI 64 |
|
#define DIGI_READ_INPUT_SIGNALS_DCD 128 |
|
|
|
|
|
/* Structures */ |
|
|
|
struct digi_serial { |
|
spinlock_t ds_serial_lock; |
|
struct usb_serial_port *ds_oob_port; /* out-of-band port */ |
|
int ds_oob_port_num; /* index of out-of-band port */ |
|
int ds_device_started; |
|
}; |
|
|
|
struct digi_port { |
|
spinlock_t dp_port_lock; |
|
int dp_port_num; |
|
int dp_out_buf_len; |
|
unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE]; |
|
int dp_write_urb_in_use; |
|
unsigned int dp_modem_signals; |
|
int dp_transmit_idle; |
|
wait_queue_head_t dp_transmit_idle_wait; |
|
int dp_throttled; |
|
int dp_throttle_restart; |
|
wait_queue_head_t dp_flush_wait; |
|
wait_queue_head_t dp_close_wait; /* wait queue for close */ |
|
wait_queue_head_t write_wait; |
|
struct usb_serial_port *dp_port; |
|
}; |
|
|
|
|
|
/* Local Function Declarations */ |
|
|
|
static int digi_write_oob_command(struct usb_serial_port *port, |
|
unsigned char *buf, int count, int interruptible); |
|
static int digi_write_inb_command(struct usb_serial_port *port, |
|
unsigned char *buf, int count, unsigned long timeout); |
|
static int digi_set_modem_signals(struct usb_serial_port *port, |
|
unsigned int modem_signals, int interruptible); |
|
static int digi_transmit_idle(struct usb_serial_port *port, |
|
unsigned long timeout); |
|
static void digi_rx_throttle(struct tty_struct *tty); |
|
static void digi_rx_unthrottle(struct tty_struct *tty); |
|
static void digi_set_termios(struct tty_struct *tty, |
|
struct usb_serial_port *port, struct ktermios *old_termios); |
|
static void digi_break_ctl(struct tty_struct *tty, int break_state); |
|
static int digi_tiocmget(struct tty_struct *tty); |
|
static int digi_tiocmset(struct tty_struct *tty, unsigned int set, |
|
unsigned int clear); |
|
static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
|
const unsigned char *buf, int count); |
|
static void digi_write_bulk_callback(struct urb *urb); |
|
static int digi_write_room(struct tty_struct *tty); |
|
static int digi_chars_in_buffer(struct tty_struct *tty); |
|
static int digi_open(struct tty_struct *tty, struct usb_serial_port *port); |
|
static void digi_close(struct usb_serial_port *port); |
|
static void digi_dtr_rts(struct usb_serial_port *port, int on); |
|
static int digi_startup_device(struct usb_serial *serial); |
|
static int digi_startup(struct usb_serial *serial); |
|
static void digi_disconnect(struct usb_serial *serial); |
|
static void digi_release(struct usb_serial *serial); |
|
static int digi_port_probe(struct usb_serial_port *port); |
|
static void digi_port_remove(struct usb_serial_port *port); |
|
static void digi_read_bulk_callback(struct urb *urb); |
|
static int digi_read_inb_callback(struct urb *urb); |
|
static int digi_read_oob_callback(struct urb *urb); |
|
|
|
|
|
static const struct usb_device_id id_table_combined[] = { |
|
{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
|
{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
|
{ } /* Terminating entry */ |
|
}; |
|
|
|
static const struct usb_device_id id_table_2[] = { |
|
{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
|
{ } /* Terminating entry */ |
|
}; |
|
|
|
static const struct usb_device_id id_table_4[] = { |
|
{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
|
{ } /* Terminating entry */ |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(usb, id_table_combined); |
|
|
|
/* device info needed for the Digi serial converter */ |
|
|
|
static struct usb_serial_driver digi_acceleport_2_device = { |
|
.driver = { |
|
.owner = THIS_MODULE, |
|
.name = "digi_2", |
|
}, |
|
.description = "Digi 2 port USB adapter", |
|
.id_table = id_table_2, |
|
.num_ports = 3, |
|
.num_bulk_in = 4, |
|
.num_bulk_out = 4, |
|
.open = digi_open, |
|
.close = digi_close, |
|
.dtr_rts = digi_dtr_rts, |
|
.write = digi_write, |
|
.write_room = digi_write_room, |
|
.write_bulk_callback = digi_write_bulk_callback, |
|
.read_bulk_callback = digi_read_bulk_callback, |
|
.chars_in_buffer = digi_chars_in_buffer, |
|
.throttle = digi_rx_throttle, |
|
.unthrottle = digi_rx_unthrottle, |
|
.set_termios = digi_set_termios, |
|
.break_ctl = digi_break_ctl, |
|
.tiocmget = digi_tiocmget, |
|
.tiocmset = digi_tiocmset, |
|
.attach = digi_startup, |
|
.disconnect = digi_disconnect, |
|
.release = digi_release, |
|
.port_probe = digi_port_probe, |
|
.port_remove = digi_port_remove, |
|
}; |
|
|
|
static struct usb_serial_driver digi_acceleport_4_device = { |
|
.driver = { |
|
.owner = THIS_MODULE, |
|
.name = "digi_4", |
|
}, |
|
.description = "Digi 4 port USB adapter", |
|
.id_table = id_table_4, |
|
.num_ports = 4, |
|
.num_bulk_in = 5, |
|
.num_bulk_out = 5, |
|
.open = digi_open, |
|
.close = digi_close, |
|
.write = digi_write, |
|
.write_room = digi_write_room, |
|
.write_bulk_callback = digi_write_bulk_callback, |
|
.read_bulk_callback = digi_read_bulk_callback, |
|
.chars_in_buffer = digi_chars_in_buffer, |
|
.throttle = digi_rx_throttle, |
|
.unthrottle = digi_rx_unthrottle, |
|
.set_termios = digi_set_termios, |
|
.break_ctl = digi_break_ctl, |
|
.tiocmget = digi_tiocmget, |
|
.tiocmset = digi_tiocmset, |
|
.attach = digi_startup, |
|
.disconnect = digi_disconnect, |
|
.release = digi_release, |
|
.port_probe = digi_port_probe, |
|
.port_remove = digi_port_remove, |
|
}; |
|
|
|
static struct usb_serial_driver * const serial_drivers[] = { |
|
&digi_acceleport_2_device, &digi_acceleport_4_device, NULL |
|
}; |
|
|
|
/* Functions */ |
|
|
|
/* |
|
* Cond Wait Interruptible Timeout Irqrestore |
|
* |
|
* Do spin_unlock_irqrestore and interruptible_sleep_on_timeout |
|
* so that wake ups are not lost if they occur between the unlock |
|
* and the sleep. In other words, spin_unlock_irqrestore and |
|
* interruptible_sleep_on_timeout are "atomic" with respect to |
|
* wake ups. This is used to implement condition variables. |
|
* |
|
* interruptible_sleep_on_timeout is deprecated and has been replaced |
|
* with the equivalent code. |
|
*/ |
|
|
|
static long cond_wait_interruptible_timeout_irqrestore( |
|
wait_queue_head_t *q, long timeout, |
|
spinlock_t *lock, unsigned long flags) |
|
__releases(lock) |
|
{ |
|
DEFINE_WAIT(wait); |
|
|
|
prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
|
spin_unlock_irqrestore(lock, flags); |
|
timeout = schedule_timeout(timeout); |
|
finish_wait(q, &wait); |
|
|
|
return timeout; |
|
} |
|
|
|
/* |
|
* Digi Write OOB Command |
|
* |
|
* Write commands on the out of band port. Commands are 4 |
|
* bytes each, multiple commands can be sent at once, and |
|
* no command will be split across USB packets. Returns 0 |
|
* if successful, -EINTR if interrupted while sleeping and |
|
* the interruptible flag is true, or a negative error |
|
* returned by usb_submit_urb. |
|
*/ |
|
|
|
static int digi_write_oob_command(struct usb_serial_port *port, |
|
unsigned char *buf, int count, int interruptible) |
|
{ |
|
int ret = 0; |
|
int len; |
|
struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
|
struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
|
unsigned long flags = 0; |
|
|
|
dev_dbg(&port->dev, |
|
"digi_write_oob_command: TOP: port=%d, count=%d\n", |
|
oob_priv->dp_port_num, count); |
|
|
|
spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
|
while (count > 0) { |
|
while (oob_priv->dp_write_urb_in_use) { |
|
cond_wait_interruptible_timeout_irqrestore( |
|
&oob_priv->write_wait, DIGI_RETRY_TIMEOUT, |
|
&oob_priv->dp_port_lock, flags); |
|
if (interruptible && signal_pending(current)) |
|
return -EINTR; |
|
spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
|
} |
|
|
|
/* len must be a multiple of 4, so commands are not split */ |
|
len = min(count, oob_port->bulk_out_size); |
|
if (len > 4) |
|
len &= ~3; |
|
memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
|
oob_port->write_urb->transfer_buffer_length = len; |
|
ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
|
if (ret == 0) { |
|
oob_priv->dp_write_urb_in_use = 1; |
|
count -= len; |
|
buf += len; |
|
} |
|
} |
|
spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
|
if (ret) |
|
dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
|
__func__, ret); |
|
return ret; |
|
|
|
} |
|
|
|
|
|
/* |
|
* Digi Write In Band Command |
|
* |
|
* Write commands on the given port. Commands are 4 |
|
* bytes each, multiple commands can be sent at once, and |
|
* no command will be split across USB packets. If timeout |
|
* is non-zero, write in band command will return after |
|
* waiting unsuccessfully for the URB status to clear for |
|
* timeout ticks. Returns 0 if successful, or a negative |
|
* error returned by digi_write. |
|
*/ |
|
|
|
static int digi_write_inb_command(struct usb_serial_port *port, |
|
unsigned char *buf, int count, unsigned long timeout) |
|
{ |
|
int ret = 0; |
|
int len; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
unsigned char *data = port->write_urb->transfer_buffer; |
|
unsigned long flags = 0; |
|
|
|
dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n", |
|
priv->dp_port_num, count); |
|
|
|
if (timeout) |
|
timeout += jiffies; |
|
else |
|
timeout = ULONG_MAX; |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
while (count > 0 && ret == 0) { |
|
while (priv->dp_write_urb_in_use && |
|
time_before(jiffies, timeout)) { |
|
cond_wait_interruptible_timeout_irqrestore( |
|
&priv->write_wait, DIGI_RETRY_TIMEOUT, |
|
&priv->dp_port_lock, flags); |
|
if (signal_pending(current)) |
|
return -EINTR; |
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
} |
|
|
|
/* len must be a multiple of 4 and small enough to */ |
|
/* guarantee the write will send buffered data first, */ |
|
/* so commands are in order with data and not split */ |
|
len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
|
if (len > 4) |
|
len &= ~3; |
|
|
|
/* write any buffered data first */ |
|
if (priv->dp_out_buf_len > 0) { |
|
data[0] = DIGI_CMD_SEND_DATA; |
|
data[1] = priv->dp_out_buf_len; |
|
memcpy(data + 2, priv->dp_out_buf, |
|
priv->dp_out_buf_len); |
|
memcpy(data + 2 + priv->dp_out_buf_len, buf, len); |
|
port->write_urb->transfer_buffer_length |
|
= priv->dp_out_buf_len + 2 + len; |
|
} else { |
|
memcpy(data, buf, len); |
|
port->write_urb->transfer_buffer_length = len; |
|
} |
|
|
|
ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
|
if (ret == 0) { |
|
priv->dp_write_urb_in_use = 1; |
|
priv->dp_out_buf_len = 0; |
|
count -= len; |
|
buf += len; |
|
} |
|
|
|
} |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
|
|
if (ret) |
|
dev_err(&port->dev, |
|
"%s: usb_submit_urb failed, ret=%d, port=%d\n", |
|
__func__, ret, priv->dp_port_num); |
|
return ret; |
|
} |
|
|
|
|
|
/* |
|
* Digi Set Modem Signals |
|
* |
|
* Sets or clears DTR and RTS on the port, according to the |
|
* modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags |
|
* for the modem_signals argument. Returns 0 if successful, |
|
* -EINTR if interrupted while sleeping, or a non-zero error |
|
* returned by usb_submit_urb. |
|
*/ |
|
|
|
static int digi_set_modem_signals(struct usb_serial_port *port, |
|
unsigned int modem_signals, int interruptible) |
|
{ |
|
|
|
int ret; |
|
struct digi_port *port_priv = usb_get_serial_port_data(port); |
|
struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
|
struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
|
unsigned char *data = oob_port->write_urb->transfer_buffer; |
|
unsigned long flags = 0; |
|
|
|
|
|
dev_dbg(&port->dev, |
|
"digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n", |
|
port_priv->dp_port_num, modem_signals); |
|
|
|
spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
|
spin_lock(&port_priv->dp_port_lock); |
|
|
|
while (oob_priv->dp_write_urb_in_use) { |
|
spin_unlock(&port_priv->dp_port_lock); |
|
cond_wait_interruptible_timeout_irqrestore( |
|
&oob_priv->write_wait, DIGI_RETRY_TIMEOUT, |
|
&oob_priv->dp_port_lock, flags); |
|
if (interruptible && signal_pending(current)) |
|
return -EINTR; |
|
spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
|
spin_lock(&port_priv->dp_port_lock); |
|
} |
|
data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
|
data[1] = port_priv->dp_port_num; |
|
data[2] = (modem_signals & TIOCM_DTR) ? |
|
DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; |
|
data[3] = 0; |
|
data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
|
data[5] = port_priv->dp_port_num; |
|
data[6] = (modem_signals & TIOCM_RTS) ? |
|
DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; |
|
data[7] = 0; |
|
|
|
oob_port->write_urb->transfer_buffer_length = 8; |
|
|
|
ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
|
if (ret == 0) { |
|
oob_priv->dp_write_urb_in_use = 1; |
|
port_priv->dp_modem_signals &= ~(TIOCM_DTR | TIOCM_RTS); |
|
port_priv->dp_modem_signals |= |
|
modem_signals & (TIOCM_DTR | TIOCM_RTS); |
|
} |
|
spin_unlock(&port_priv->dp_port_lock); |
|
spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
|
if (ret) |
|
dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
|
__func__, ret); |
|
return ret; |
|
} |
|
|
|
/* |
|
* Digi Transmit Idle |
|
* |
|
* Digi transmit idle waits, up to timeout ticks, for the transmitter |
|
* to go idle. It returns 0 if successful or a negative error. |
|
* |
|
* There are race conditions here if more than one process is calling |
|
* digi_transmit_idle on the same port at the same time. However, this |
|
* is only called from close, and only one process can be in close on a |
|
* port at a time, so its ok. |
|
*/ |
|
|
|
static int digi_transmit_idle(struct usb_serial_port *port, |
|
unsigned long timeout) |
|
{ |
|
int ret; |
|
unsigned char buf[2]; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
unsigned long flags = 0; |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
priv->dp_transmit_idle = 0; |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
|
|
buf[0] = DIGI_CMD_TRANSMIT_IDLE; |
|
buf[1] = 0; |
|
|
|
timeout += jiffies; |
|
|
|
ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
|
if (ret != 0) |
|
return ret; |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
|
|
while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
|
cond_wait_interruptible_timeout_irqrestore( |
|
&priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, |
|
&priv->dp_port_lock, flags); |
|
if (signal_pending(current)) |
|
return -EINTR; |
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
} |
|
priv->dp_transmit_idle = 0; |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
return 0; |
|
|
|
} |
|
|
|
|
|
static void digi_rx_throttle(struct tty_struct *tty) |
|
{ |
|
unsigned long flags; |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
|
|
/* stop receiving characters by not resubmitting the read urb */ |
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
priv->dp_throttled = 1; |
|
priv->dp_throttle_restart = 0; |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
} |
|
|
|
|
|
static void digi_rx_unthrottle(struct tty_struct *tty) |
|
{ |
|
int ret = 0; |
|
unsigned long flags; |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
|
|
/* restart read chain */ |
|
if (priv->dp_throttle_restart) |
|
ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
|
|
|
/* turn throttle off */ |
|
priv->dp_throttled = 0; |
|
priv->dp_throttle_restart = 0; |
|
|
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
|
|
if (ret) |
|
dev_err(&port->dev, |
|
"%s: usb_submit_urb failed, ret=%d, port=%d\n", |
|
__func__, ret, priv->dp_port_num); |
|
} |
|
|
|
|
|
static void digi_set_termios(struct tty_struct *tty, |
|
struct usb_serial_port *port, struct ktermios *old_termios) |
|
{ |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
struct device *dev = &port->dev; |
|
unsigned int iflag = tty->termios.c_iflag; |
|
unsigned int cflag = tty->termios.c_cflag; |
|
unsigned int old_iflag = old_termios->c_iflag; |
|
unsigned int old_cflag = old_termios->c_cflag; |
|
unsigned char buf[32]; |
|
unsigned int modem_signals; |
|
int arg, ret; |
|
int i = 0; |
|
speed_t baud; |
|
|
|
dev_dbg(dev, |
|
"digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n", |
|
priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); |
|
|
|
/* set baud rate */ |
|
baud = tty_get_baud_rate(tty); |
|
if (baud != tty_termios_baud_rate(old_termios)) { |
|
arg = -1; |
|
|
|
/* reassert DTR and (maybe) RTS on transition from B0 */ |
|
if ((old_cflag & CBAUD) == B0) { |
|
/* don't set RTS if using hardware flow control */ |
|
/* and throttling input */ |
|
modem_signals = TIOCM_DTR; |
|
if (!C_CRTSCTS(tty) || !tty_throttled(tty)) |
|
modem_signals |= TIOCM_RTS; |
|
digi_set_modem_signals(port, modem_signals, 1); |
|
} |
|
switch (baud) { |
|
/* drop DTR and RTS on transition to B0 */ |
|
case 0: digi_set_modem_signals(port, 0, 1); break; |
|
case 50: arg = DIGI_BAUD_50; break; |
|
case 75: arg = DIGI_BAUD_75; break; |
|
case 110: arg = DIGI_BAUD_110; break; |
|
case 150: arg = DIGI_BAUD_150; break; |
|
case 200: arg = DIGI_BAUD_200; break; |
|
case 300: arg = DIGI_BAUD_300; break; |
|
case 600: arg = DIGI_BAUD_600; break; |
|
case 1200: arg = DIGI_BAUD_1200; break; |
|
case 1800: arg = DIGI_BAUD_1800; break; |
|
case 2400: arg = DIGI_BAUD_2400; break; |
|
case 4800: arg = DIGI_BAUD_4800; break; |
|
case 9600: arg = DIGI_BAUD_9600; break; |
|
case 19200: arg = DIGI_BAUD_19200; break; |
|
case 38400: arg = DIGI_BAUD_38400; break; |
|
case 57600: arg = DIGI_BAUD_57600; break; |
|
case 115200: arg = DIGI_BAUD_115200; break; |
|
case 230400: arg = DIGI_BAUD_230400; break; |
|
case 460800: arg = DIGI_BAUD_460800; break; |
|
default: |
|
arg = DIGI_BAUD_9600; |
|
baud = 9600; |
|
break; |
|
} |
|
if (arg != -1) { |
|
buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = arg; |
|
buf[i++] = 0; |
|
} |
|
} |
|
/* set parity */ |
|
tty->termios.c_cflag &= ~CMSPAR; |
|
|
|
if ((cflag & (PARENB | PARODD)) != (old_cflag & (PARENB | PARODD))) { |
|
if (cflag & PARENB) { |
|
if (cflag & PARODD) |
|
arg = DIGI_PARITY_ODD; |
|
else |
|
arg = DIGI_PARITY_EVEN; |
|
} else { |
|
arg = DIGI_PARITY_NONE; |
|
} |
|
buf[i++] = DIGI_CMD_SET_PARITY; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = arg; |
|
buf[i++] = 0; |
|
} |
|
/* set word size */ |
|
if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
|
arg = -1; |
|
switch (cflag & CSIZE) { |
|
case CS5: arg = DIGI_WORD_SIZE_5; break; |
|
case CS6: arg = DIGI_WORD_SIZE_6; break; |
|
case CS7: arg = DIGI_WORD_SIZE_7; break; |
|
case CS8: arg = DIGI_WORD_SIZE_8; break; |
|
default: |
|
dev_dbg(dev, |
|
"digi_set_termios: can't handle word size %d\n", |
|
cflag & CSIZE); |
|
break; |
|
} |
|
|
|
if (arg != -1) { |
|
buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = arg; |
|
buf[i++] = 0; |
|
} |
|
|
|
} |
|
|
|
/* set stop bits */ |
|
if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { |
|
|
|
if ((cflag & CSTOPB)) |
|
arg = DIGI_STOP_BITS_2; |
|
else |
|
arg = DIGI_STOP_BITS_1; |
|
|
|
buf[i++] = DIGI_CMD_SET_STOP_BITS; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = arg; |
|
buf[i++] = 0; |
|
|
|
} |
|
|
|
/* set input flow control */ |
|
if ((iflag & IXOFF) != (old_iflag & IXOFF) || |
|
(cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { |
|
arg = 0; |
|
if (iflag & IXOFF) |
|
arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
|
else |
|
arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
|
|
|
if (cflag & CRTSCTS) { |
|
arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
|
|
|
/* On USB-4 it is necessary to assert RTS prior */ |
|
/* to selecting RTS input flow control. */ |
|
buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = DIGI_RTS_ACTIVE; |
|
buf[i++] = 0; |
|
|
|
} else { |
|
arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; |
|
} |
|
buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = arg; |
|
buf[i++] = 0; |
|
} |
|
|
|
/* set output flow control */ |
|
if ((iflag & IXON) != (old_iflag & IXON) || |
|
(cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { |
|
arg = 0; |
|
if (iflag & IXON) |
|
arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
|
else |
|
arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
|
|
|
if (cflag & CRTSCTS) |
|
arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
|
else |
|
arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; |
|
|
|
buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = arg; |
|
buf[i++] = 0; |
|
} |
|
|
|
/* set receive enable/disable */ |
|
if ((cflag & CREAD) != (old_cflag & CREAD)) { |
|
if (cflag & CREAD) |
|
arg = DIGI_ENABLE; |
|
else |
|
arg = DIGI_DISABLE; |
|
|
|
buf[i++] = DIGI_CMD_RECEIVE_ENABLE; |
|
buf[i++] = priv->dp_port_num; |
|
buf[i++] = arg; |
|
buf[i++] = 0; |
|
} |
|
ret = digi_write_oob_command(port, buf, i, 1); |
|
if (ret != 0) |
|
dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret); |
|
tty_encode_baud_rate(tty, baud, baud); |
|
} |
|
|
|
|
|
static void digi_break_ctl(struct tty_struct *tty, int break_state) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
unsigned char buf[4]; |
|
|
|
buf[0] = DIGI_CMD_BREAK_CONTROL; |
|
buf[1] = 2; /* length */ |
|
buf[2] = break_state ? 1 : 0; |
|
buf[3] = 0; /* pad */ |
|
digi_write_inb_command(port, buf, 4, 0); |
|
} |
|
|
|
|
|
static int digi_tiocmget(struct tty_struct *tty) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
unsigned int val; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
val = priv->dp_modem_signals; |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
return val; |
|
} |
|
|
|
|
|
static int digi_tiocmset(struct tty_struct *tty, |
|
unsigned int set, unsigned int clear) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
unsigned int val; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
val = (priv->dp_modem_signals & ~clear) | set; |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
return digi_set_modem_signals(port, val, 1); |
|
} |
|
|
|
|
|
static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
|
const unsigned char *buf, int count) |
|
{ |
|
|
|
int ret, data_len, new_len; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
unsigned char *data = port->write_urb->transfer_buffer; |
|
unsigned long flags = 0; |
|
|
|
dev_dbg(&port->dev, "digi_write: TOP: port=%d, count=%d\n", |
|
priv->dp_port_num, count); |
|
|
|
/* copy user data (which can sleep) before getting spin lock */ |
|
count = min(count, port->bulk_out_size-2); |
|
count = min(64, count); |
|
|
|
/* be sure only one write proceeds at a time */ |
|
/* there are races on the port private buffer */ |
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
|
|
/* wait for urb status clear to submit another urb */ |
|
if (priv->dp_write_urb_in_use) { |
|
/* buffer data if count is 1 (probably put_char) if possible */ |
|
if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
|
priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
|
new_len = 1; |
|
} else { |
|
new_len = 0; |
|
} |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
return new_len; |
|
} |
|
|
|
/* allow space for any buffered data and for new data, up to */ |
|
/* transfer buffer size - 2 (for command and length bytes) */ |
|
new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
|
data_len = new_len + priv->dp_out_buf_len; |
|
|
|
if (data_len == 0) { |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
return 0; |
|
} |
|
|
|
port->write_urb->transfer_buffer_length = data_len+2; |
|
|
|
*data++ = DIGI_CMD_SEND_DATA; |
|
*data++ = data_len; |
|
|
|
/* copy in buffered data first */ |
|
memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
|
data += priv->dp_out_buf_len; |
|
|
|
/* copy in new data */ |
|
memcpy(data, buf, new_len); |
|
|
|
ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
|
if (ret == 0) { |
|
priv->dp_write_urb_in_use = 1; |
|
ret = new_len; |
|
priv->dp_out_buf_len = 0; |
|
} |
|
|
|
/* return length of new data written, or error */ |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
if (ret < 0) |
|
dev_err_console(port, |
|
"%s: usb_submit_urb failed, ret=%d, port=%d\n", |
|
__func__, ret, priv->dp_port_num); |
|
dev_dbg(&port->dev, "digi_write: returning %d\n", ret); |
|
return ret; |
|
|
|
} |
|
|
|
static void digi_write_bulk_callback(struct urb *urb) |
|
{ |
|
|
|
struct usb_serial_port *port = urb->context; |
|
struct usb_serial *serial; |
|
struct digi_port *priv; |
|
struct digi_serial *serial_priv; |
|
unsigned long flags; |
|
int ret = 0; |
|
int status = urb->status; |
|
bool wakeup; |
|
|
|
/* port and serial sanity check */ |
|
if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
|
pr_err("%s: port or port->private is NULL, status=%d\n", |
|
__func__, status); |
|
return; |
|
} |
|
serial = port->serial; |
|
if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
|
dev_err(&port->dev, |
|
"%s: serial or serial->private is NULL, status=%d\n", |
|
__func__, status); |
|
return; |
|
} |
|
|
|
/* handle oob callback */ |
|
if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
|
dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n"); |
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
priv->dp_write_urb_in_use = 0; |
|
wake_up_interruptible(&priv->write_wait); |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
return; |
|
} |
|
|
|
/* try to send any buffered data on this port */ |
|
wakeup = true; |
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
priv->dp_write_urb_in_use = 0; |
|
if (priv->dp_out_buf_len > 0) { |
|
*((unsigned char *)(port->write_urb->transfer_buffer)) |
|
= (unsigned char)DIGI_CMD_SEND_DATA; |
|
*((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
|
= (unsigned char)priv->dp_out_buf_len; |
|
port->write_urb->transfer_buffer_length = |
|
priv->dp_out_buf_len + 2; |
|
memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
|
priv->dp_out_buf_len); |
|
ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
|
if (ret == 0) { |
|
priv->dp_write_urb_in_use = 1; |
|
priv->dp_out_buf_len = 0; |
|
wakeup = false; |
|
} |
|
} |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
|
|
if (ret && ret != -EPERM) |
|
dev_err_console(port, |
|
"%s: usb_submit_urb failed, ret=%d, port=%d\n", |
|
__func__, ret, priv->dp_port_num); |
|
|
|
if (wakeup) |
|
tty_port_tty_wakeup(&port->port); |
|
} |
|
|
|
static int digi_write_room(struct tty_struct *tty) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
int room; |
|
unsigned long flags = 0; |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
|
|
if (priv->dp_write_urb_in_use) |
|
room = 0; |
|
else |
|
room = port->bulk_out_size - 2 - priv->dp_out_buf_len; |
|
|
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room); |
|
return room; |
|
|
|
} |
|
|
|
static int digi_chars_in_buffer(struct tty_struct *tty) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
|
|
if (priv->dp_write_urb_in_use) { |
|
dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
|
priv->dp_port_num, port->bulk_out_size - 2); |
|
/* return(port->bulk_out_size - 2); */ |
|
return 256; |
|
} else { |
|
dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
|
priv->dp_port_num, priv->dp_out_buf_len); |
|
return priv->dp_out_buf_len; |
|
} |
|
|
|
} |
|
|
|
static void digi_dtr_rts(struct usb_serial_port *port, int on) |
|
{ |
|
/* Adjust DTR and RTS */ |
|
digi_set_modem_signals(port, on * (TIOCM_DTR | TIOCM_RTS), 1); |
|
} |
|
|
|
static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
|
{ |
|
int ret; |
|
unsigned char buf[32]; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
struct ktermios not_termios; |
|
|
|
/* be sure the device is started up */ |
|
if (digi_startup_device(port->serial) != 0) |
|
return -ENXIO; |
|
|
|
/* read modem signals automatically whenever they change */ |
|
buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; |
|
buf[1] = priv->dp_port_num; |
|
buf[2] = DIGI_ENABLE; |
|
buf[3] = 0; |
|
|
|
/* flush fifos */ |
|
buf[4] = DIGI_CMD_IFLUSH_FIFO; |
|
buf[5] = priv->dp_port_num; |
|
buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; |
|
buf[7] = 0; |
|
|
|
ret = digi_write_oob_command(port, buf, 8, 1); |
|
if (ret != 0) |
|
dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret); |
|
|
|
/* set termios settings */ |
|
if (tty) { |
|
not_termios.c_cflag = ~tty->termios.c_cflag; |
|
not_termios.c_iflag = ~tty->termios.c_iflag; |
|
digi_set_termios(tty, port, ¬_termios); |
|
} |
|
return 0; |
|
} |
|
|
|
|
|
static void digi_close(struct usb_serial_port *port) |
|
{ |
|
DEFINE_WAIT(wait); |
|
int ret; |
|
unsigned char buf[32]; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
|
|
mutex_lock(&port->serial->disc_mutex); |
|
/* if disconnected, just clear flags */ |
|
if (port->serial->disconnected) |
|
goto exit; |
|
|
|
/* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
|
digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); |
|
|
|
/* disable input flow control */ |
|
buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
|
buf[1] = priv->dp_port_num; |
|
buf[2] = DIGI_DISABLE; |
|
buf[3] = 0; |
|
|
|
/* disable output flow control */ |
|
buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; |
|
buf[5] = priv->dp_port_num; |
|
buf[6] = DIGI_DISABLE; |
|
buf[7] = 0; |
|
|
|
/* disable reading modem signals automatically */ |
|
buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; |
|
buf[9] = priv->dp_port_num; |
|
buf[10] = DIGI_DISABLE; |
|
buf[11] = 0; |
|
|
|
/* disable receive */ |
|
buf[12] = DIGI_CMD_RECEIVE_ENABLE; |
|
buf[13] = priv->dp_port_num; |
|
buf[14] = DIGI_DISABLE; |
|
buf[15] = 0; |
|
|
|
/* flush fifos */ |
|
buf[16] = DIGI_CMD_IFLUSH_FIFO; |
|
buf[17] = priv->dp_port_num; |
|
buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; |
|
buf[19] = 0; |
|
|
|
ret = digi_write_oob_command(port, buf, 20, 0); |
|
if (ret != 0) |
|
dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n", |
|
ret); |
|
/* wait for final commands on oob port to complete */ |
|
prepare_to_wait(&priv->dp_flush_wait, &wait, |
|
TASK_INTERRUPTIBLE); |
|
schedule_timeout(DIGI_CLOSE_TIMEOUT); |
|
finish_wait(&priv->dp_flush_wait, &wait); |
|
|
|
/* shutdown any outstanding bulk writes */ |
|
usb_kill_urb(port->write_urb); |
|
exit: |
|
spin_lock_irq(&priv->dp_port_lock); |
|
priv->dp_write_urb_in_use = 0; |
|
wake_up_interruptible(&priv->dp_close_wait); |
|
spin_unlock_irq(&priv->dp_port_lock); |
|
mutex_unlock(&port->serial->disc_mutex); |
|
} |
|
|
|
|
|
/* |
|
* Digi Startup Device |
|
* |
|
* Starts reads on all ports. Must be called AFTER startup, with |
|
* urbs initialized. Returns 0 if successful, non-zero error otherwise. |
|
*/ |
|
|
|
static int digi_startup_device(struct usb_serial *serial) |
|
{ |
|
int i, ret = 0; |
|
struct digi_serial *serial_priv = usb_get_serial_data(serial); |
|
struct usb_serial_port *port; |
|
|
|
/* be sure this happens exactly once */ |
|
spin_lock(&serial_priv->ds_serial_lock); |
|
if (serial_priv->ds_device_started) { |
|
spin_unlock(&serial_priv->ds_serial_lock); |
|
return 0; |
|
} |
|
serial_priv->ds_device_started = 1; |
|
spin_unlock(&serial_priv->ds_serial_lock); |
|
|
|
/* start reading from each bulk in endpoint for the device */ |
|
/* set USB_DISABLE_SPD flag for write bulk urbs */ |
|
for (i = 0; i < serial->type->num_ports + 1; i++) { |
|
port = serial->port[i]; |
|
ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
|
if (ret != 0) { |
|
dev_err(&port->dev, |
|
"%s: usb_submit_urb failed, ret=%d, port=%d\n", |
|
__func__, ret, i); |
|
break; |
|
} |
|
} |
|
return ret; |
|
} |
|
|
|
static int digi_port_init(struct usb_serial_port *port, unsigned port_num) |
|
{ |
|
struct digi_port *priv; |
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
|
|
spin_lock_init(&priv->dp_port_lock); |
|
priv->dp_port_num = port_num; |
|
init_waitqueue_head(&priv->dp_transmit_idle_wait); |
|
init_waitqueue_head(&priv->dp_flush_wait); |
|
init_waitqueue_head(&priv->dp_close_wait); |
|
init_waitqueue_head(&priv->write_wait); |
|
priv->dp_port = port; |
|
|
|
usb_set_serial_port_data(port, priv); |
|
|
|
return 0; |
|
} |
|
|
|
static int digi_startup(struct usb_serial *serial) |
|
{ |
|
struct digi_serial *serial_priv; |
|
int ret; |
|
|
|
serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); |
|
if (!serial_priv) |
|
return -ENOMEM; |
|
|
|
spin_lock_init(&serial_priv->ds_serial_lock); |
|
serial_priv->ds_oob_port_num = serial->type->num_ports; |
|
serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; |
|
|
|
ret = digi_port_init(serial_priv->ds_oob_port, |
|
serial_priv->ds_oob_port_num); |
|
if (ret) { |
|
kfree(serial_priv); |
|
return ret; |
|
} |
|
|
|
usb_set_serial_data(serial, serial_priv); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static void digi_disconnect(struct usb_serial *serial) |
|
{ |
|
int i; |
|
|
|
/* stop reads and writes on all ports */ |
|
for (i = 0; i < serial->type->num_ports + 1; i++) { |
|
usb_kill_urb(serial->port[i]->read_urb); |
|
usb_kill_urb(serial->port[i]->write_urb); |
|
} |
|
} |
|
|
|
|
|
static void digi_release(struct usb_serial *serial) |
|
{ |
|
struct digi_serial *serial_priv; |
|
struct digi_port *priv; |
|
|
|
serial_priv = usb_get_serial_data(serial); |
|
|
|
priv = usb_get_serial_port_data(serial_priv->ds_oob_port); |
|
kfree(priv); |
|
|
|
kfree(serial_priv); |
|
} |
|
|
|
static int digi_port_probe(struct usb_serial_port *port) |
|
{ |
|
return digi_port_init(port, port->port_number); |
|
} |
|
|
|
static void digi_port_remove(struct usb_serial_port *port) |
|
{ |
|
struct digi_port *priv; |
|
|
|
priv = usb_get_serial_port_data(port); |
|
kfree(priv); |
|
} |
|
|
|
static void digi_read_bulk_callback(struct urb *urb) |
|
{ |
|
struct usb_serial_port *port = urb->context; |
|
struct digi_port *priv; |
|
struct digi_serial *serial_priv; |
|
int ret; |
|
int status = urb->status; |
|
|
|
/* port sanity check, do not resubmit if port is not valid */ |
|
if (port == NULL) |
|
return; |
|
priv = usb_get_serial_port_data(port); |
|
if (priv == NULL) { |
|
dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", |
|
__func__, status); |
|
return; |
|
} |
|
if (port->serial == NULL || |
|
(serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
|
dev_err(&port->dev, "%s: serial is bad or serial->private " |
|
"is NULL, status=%d\n", __func__, status); |
|
return; |
|
} |
|
|
|
/* do not resubmit urb if it has any status error */ |
|
if (status) { |
|
dev_err(&port->dev, |
|
"%s: nonzero read bulk status: status=%d, port=%d\n", |
|
__func__, status, priv->dp_port_num); |
|
return; |
|
} |
|
|
|
/* handle oob or inb callback, do not resubmit if error */ |
|
if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
|
if (digi_read_oob_callback(urb) != 0) |
|
return; |
|
} else { |
|
if (digi_read_inb_callback(urb) != 0) |
|
return; |
|
} |
|
|
|
/* continue read */ |
|
ret = usb_submit_urb(urb, GFP_ATOMIC); |
|
if (ret != 0 && ret != -EPERM) { |
|
dev_err(&port->dev, |
|
"%s: failed resubmitting urb, ret=%d, port=%d\n", |
|
__func__, ret, priv->dp_port_num); |
|
} |
|
|
|
} |
|
|
|
/* |
|
* Digi Read INB Callback |
|
* |
|
* Digi Read INB Callback handles reads on the in band ports, sending |
|
* the data on to the tty subsystem. When called we know port and |
|
* port->private are not NULL and port->serial has been validated. |
|
* It returns 0 if successful, 1 if successful but the port is |
|
* throttled, and -1 if the sanity checks failed. |
|
*/ |
|
|
|
static int digi_read_inb_callback(struct urb *urb) |
|
{ |
|
struct usb_serial_port *port = urb->context; |
|
struct digi_port *priv = usb_get_serial_port_data(port); |
|
unsigned char *buf = urb->transfer_buffer; |
|
unsigned long flags; |
|
int opcode; |
|
int len; |
|
int port_status; |
|
unsigned char *data; |
|
int tty_flag, throttled; |
|
|
|
/* short/multiple packet check */ |
|
if (urb->actual_length < 2) { |
|
dev_warn(&port->dev, "short packet received\n"); |
|
return -1; |
|
} |
|
|
|
opcode = buf[0]; |
|
len = buf[1]; |
|
|
|
if (urb->actual_length != len + 2) { |
|
dev_err(&port->dev, "malformed packet received: port=%d, opcode=%d, len=%d, actual_length=%u\n", |
|
priv->dp_port_num, opcode, len, urb->actual_length); |
|
return -1; |
|
} |
|
|
|
if (opcode == DIGI_CMD_RECEIVE_DATA && len < 1) { |
|
dev_err(&port->dev, "malformed data packet received\n"); |
|
return -1; |
|
} |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
|
|
/* check for throttle; if set, do not resubmit read urb */ |
|
/* indicate the read chain needs to be restarted on unthrottle */ |
|
throttled = priv->dp_throttled; |
|
if (throttled) |
|
priv->dp_throttle_restart = 1; |
|
|
|
/* receive data */ |
|
if (opcode == DIGI_CMD_RECEIVE_DATA) { |
|
port_status = buf[2]; |
|
data = &buf[3]; |
|
|
|
/* get flag from port_status */ |
|
tty_flag = 0; |
|
|
|
/* overrun is special, not associated with a char */ |
|
if (port_status & DIGI_OVERRUN_ERROR) |
|
tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
|
|
|
/* break takes precedence over parity, */ |
|
/* which takes precedence over framing errors */ |
|
if (port_status & DIGI_BREAK_ERROR) |
|
tty_flag = TTY_BREAK; |
|
else if (port_status & DIGI_PARITY_ERROR) |
|
tty_flag = TTY_PARITY; |
|
else if (port_status & DIGI_FRAMING_ERROR) |
|
tty_flag = TTY_FRAME; |
|
|
|
/* data length is len-1 (one byte of len is port_status) */ |
|
--len; |
|
if (len > 0) { |
|
tty_insert_flip_string_fixed_flag(&port->port, data, |
|
tty_flag, len); |
|
tty_flip_buffer_push(&port->port); |
|
} |
|
} |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
|
|
if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
|
dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__); |
|
else if (opcode != DIGI_CMD_RECEIVE_DATA) |
|
dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode); |
|
|
|
return throttled ? 1 : 0; |
|
|
|
} |
|
|
|
|
|
/* |
|
* Digi Read OOB Callback |
|
* |
|
* Digi Read OOB Callback handles reads on the out of band port. |
|
* When called we know port and port->private are not NULL and |
|
* the port->serial is valid. It returns 0 if successful, and |
|
* -1 if the sanity checks failed. |
|
*/ |
|
|
|
static int digi_read_oob_callback(struct urb *urb) |
|
{ |
|
|
|
struct usb_serial_port *port = urb->context; |
|
struct usb_serial *serial = port->serial; |
|
struct tty_struct *tty; |
|
struct digi_port *priv; |
|
unsigned char *buf = urb->transfer_buffer; |
|
int opcode, line, status, val; |
|
unsigned long flags; |
|
int i; |
|
unsigned int rts; |
|
|
|
if (urb->actual_length < 4) |
|
return -1; |
|
|
|
/* handle each oob command */ |
|
for (i = 0; i < urb->actual_length - 3; i += 4) { |
|
opcode = buf[i]; |
|
line = buf[i + 1]; |
|
status = buf[i + 2]; |
|
val = buf[i + 3]; |
|
|
|
dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n", |
|
opcode, line, status, val); |
|
|
|
if (status != 0 || line >= serial->type->num_ports) |
|
continue; |
|
|
|
port = serial->port[line]; |
|
|
|
priv = usb_get_serial_port_data(port); |
|
if (priv == NULL) |
|
return -1; |
|
|
|
tty = tty_port_tty_get(&port->port); |
|
|
|
rts = 0; |
|
if (tty) |
|
rts = C_CRTSCTS(tty); |
|
|
|
if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
|
bool wakeup = false; |
|
|
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
/* convert from digi flags to termiox flags */ |
|
if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
|
priv->dp_modem_signals |= TIOCM_CTS; |
|
if (rts) |
|
wakeup = true; |
|
} else { |
|
priv->dp_modem_signals &= ~TIOCM_CTS; |
|
/* port must be open to use tty struct */ |
|
} |
|
if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
|
priv->dp_modem_signals |= TIOCM_DSR; |
|
else |
|
priv->dp_modem_signals &= ~TIOCM_DSR; |
|
if (val & DIGI_READ_INPUT_SIGNALS_RI) |
|
priv->dp_modem_signals |= TIOCM_RI; |
|
else |
|
priv->dp_modem_signals &= ~TIOCM_RI; |
|
if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
|
priv->dp_modem_signals |= TIOCM_CD; |
|
else |
|
priv->dp_modem_signals &= ~TIOCM_CD; |
|
|
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
|
|
if (wakeup) |
|
tty_port_tty_wakeup(&port->port); |
|
} else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { |
|
spin_lock_irqsave(&priv->dp_port_lock, flags); |
|
priv->dp_transmit_idle = 1; |
|
wake_up_interruptible(&priv->dp_transmit_idle_wait); |
|
spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
|
} else if (opcode == DIGI_CMD_IFLUSH_FIFO) { |
|
wake_up_interruptible(&priv->dp_flush_wait); |
|
} |
|
tty_kref_put(tty); |
|
} |
|
return 0; |
|
|
|
} |
|
|
|
module_usb_serial_driver(serial_drivers, id_table_combined); |
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR); |
|
MODULE_DESCRIPTION(DRIVER_DESC); |
|
MODULE_LICENSE("GPL");
|
|
|