3 * TI 3410/5052 USB Serial Driver
5 * Copyright (C) 2004 Texas Instruments
7 * This driver is based on the Linux io_ti driver, which is
8 * Copyright (C) 2000-2002 Inside Out Networks
9 * Copyright (C) 2001-2002 Greg Kroah-Hartman
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * For questions or problems with this driver, contact Texas Instruments
17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18 * Peter Berger <pberger@brimson.com>.
20 * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
21 * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
29 * if [[ "$ACTION" != "add" ]]
34 * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
36 * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
41 * PRODUCT=${PRODUCT%/?*} # delete version
42 * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
43 * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
45 * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
62 * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
63 * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
64 * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
65 * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
67 * echo $ACTIVE_CONFIG > $CONFIG_PATH
71 #include <linux/kernel.h>
72 #include <linux/errno.h>
73 #include <linux/firmware.h>
74 #include <linux/init.h>
75 #include <linux/slab.h>
76 #include <linux/tty.h>
77 #include <linux/tty_driver.h>
78 #include <linux/tty_flip.h>
79 #include <linux/module.h>
80 #include <linux/spinlock.h>
81 #include <linux/ioctl.h>
82 #include <linux/serial.h>
83 #include <linux/circ_buf.h>
84 #include <linux/mutex.h>
85 #include <linux/uaccess.h>
86 #include <linux/usb.h>
87 #include <linux/usb/serial.h>
88 #include <linux/firmware.h>
90 #include "ti_usb_3410_5052.h"
94 #define TI_DRIVER_VERSION "v0.9"
95 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
96 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
98 #define TI_FIRMWARE_BUF_SIZE 16284
100 #define TI_WRITE_BUF_SIZE 1024
102 #define TI_TRANSFER_TIMEOUT 2
104 #define TI_DEFAULT_LOW_LATENCY 0
105 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
107 /* supported setserial flags */
108 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
110 /* read urb states */
111 #define TI_READ_URB_RUNNING 0
112 #define TI_READ_URB_STOPPING 1
113 #define TI_READ_URB_STOPPED 2
115 #define TI_EXTRA_VID_PID_COUNT 5
125 __u8 tp_uart_mode
; /* 232 or 485 modes */
126 unsigned int tp_uart_base_addr
;
128 int tp_closing_wait
;/* in .01 secs */
129 struct async_icount tp_icount
;
130 wait_queue_head_t tp_msr_wait
; /* wait for msr change */
131 wait_queue_head_t tp_write_wait
;
132 struct ti_device
*tp_tdev
;
133 struct usb_serial_port
*tp_port
;
135 int tp_read_urb_state
;
136 int tp_write_urb_in_use
;
137 struct circ_buf
*tp_write_buf
;
141 struct mutex td_open_close_lock
;
142 int td_open_port_count
;
143 struct usb_serial
*td_serial
;
149 /* Function Declarations */
151 static int ti_startup(struct usb_serial
*serial
);
152 static void ti_shutdown(struct usb_serial
*serial
);
153 static int ti_open(struct tty_struct
*tty
, struct usb_serial_port
*port
,
155 static void ti_close(struct tty_struct
*tty
, struct usb_serial_port
*port
,
157 static int ti_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
158 const unsigned char *data
, int count
);
159 static int ti_write_room(struct tty_struct
*tty
);
160 static int ti_chars_in_buffer(struct tty_struct
*tty
);
161 static void ti_throttle(struct tty_struct
*tty
);
162 static void ti_unthrottle(struct tty_struct
*tty
);
163 static int ti_ioctl(struct tty_struct
*tty
, struct file
*file
,
164 unsigned int cmd
, unsigned long arg
);
165 static void ti_set_termios(struct tty_struct
*tty
,
166 struct usb_serial_port
*port
, struct ktermios
*old_termios
);
167 static int ti_tiocmget(struct tty_struct
*tty
, struct file
*file
);
168 static int ti_tiocmset(struct tty_struct
*tty
, struct file
*file
,
169 unsigned int set
, unsigned int clear
);
170 static void ti_break(struct tty_struct
*tty
, int break_state
);
171 static void ti_interrupt_callback(struct urb
*urb
);
172 static void ti_bulk_in_callback(struct urb
*urb
);
173 static void ti_bulk_out_callback(struct urb
*urb
);
175 static void ti_recv(struct device
*dev
, struct tty_struct
*tty
,
176 unsigned char *data
, int length
);
177 static void ti_send(struct ti_port
*tport
);
178 static int ti_set_mcr(struct ti_port
*tport
, unsigned int mcr
);
179 static int ti_get_lsr(struct ti_port
*tport
);
180 static int ti_get_serial_info(struct ti_port
*tport
,
181 struct serial_struct __user
*ret_arg
);
182 static int ti_set_serial_info(struct ti_port
*tport
,
183 struct serial_struct __user
*new_arg
);
184 static void ti_handle_new_msr(struct ti_port
*tport
, __u8 msr
);
186 static void ti_drain(struct ti_port
*tport
, unsigned long timeout
, int flush
);
188 static void ti_stop_read(struct ti_port
*tport
, struct tty_struct
*tty
);
189 static int ti_restart_read(struct ti_port
*tport
, struct tty_struct
*tty
);
191 static int ti_command_out_sync(struct ti_device
*tdev
, __u8 command
,
192 __u16 moduleid
, __u16 value
, __u8
*data
, int size
);
193 static int ti_command_in_sync(struct ti_device
*tdev
, __u8 command
,
194 __u16 moduleid
, __u16 value
, __u8
*data
, int size
);
196 static int ti_write_byte(struct ti_device
*tdev
, unsigned long addr
,
197 __u8 mask
, __u8 byte
);
199 static int ti_download_firmware(struct ti_device
*tdev
, int type
);
201 /* circular buffer */
202 static struct circ_buf
*ti_buf_alloc(void);
203 static void ti_buf_free(struct circ_buf
*cb
);
204 static void ti_buf_clear(struct circ_buf
*cb
);
205 static int ti_buf_data_avail(struct circ_buf
*cb
);
206 static int ti_buf_space_avail(struct circ_buf
*cb
);
207 static int ti_buf_put(struct circ_buf
*cb
, const char *buf
, int count
);
208 static int ti_buf_get(struct circ_buf
*cb
, char *buf
, int count
);
213 /* module parameters */
215 static int low_latency
= TI_DEFAULT_LOW_LATENCY
;
216 static int closing_wait
= TI_DEFAULT_CLOSING_WAIT
;
217 static ushort vendor_3410
[TI_EXTRA_VID_PID_COUNT
];
218 static unsigned int vendor_3410_count
;
219 static ushort product_3410
[TI_EXTRA_VID_PID_COUNT
];
220 static unsigned int product_3410_count
;
221 static ushort vendor_5052
[TI_EXTRA_VID_PID_COUNT
];
222 static unsigned int vendor_5052_count
;
223 static ushort product_5052
[TI_EXTRA_VID_PID_COUNT
];
224 static unsigned int product_5052_count
;
226 /* supported devices */
227 /* the array dimension is the number of default entries plus */
228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
230 static struct usb_device_id ti_id_table_3410
[1+TI_EXTRA_VID_PID_COUNT
+1] = {
231 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_PRODUCT_ID
) },
232 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_EZ430_ID
) },
235 static struct usb_device_id ti_id_table_5052
[4+TI_EXTRA_VID_PID_COUNT
+1] = {
236 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_BOOT_PRODUCT_ID
) },
237 { USB_DEVICE(TI_VENDOR_ID
, TI_5152_BOOT_PRODUCT_ID
) },
238 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_EEPROM_PRODUCT_ID
) },
239 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_FIRMWARE_PRODUCT_ID
) },
242 static struct usb_device_id ti_id_table_combined
[] = {
243 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_PRODUCT_ID
) },
244 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_EZ430_ID
) },
245 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_BOOT_PRODUCT_ID
) },
246 { USB_DEVICE(TI_VENDOR_ID
, TI_5152_BOOT_PRODUCT_ID
) },
247 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_EEPROM_PRODUCT_ID
) },
248 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_FIRMWARE_PRODUCT_ID
) },
252 static struct usb_driver ti_usb_driver
= {
253 .name
= "ti_usb_3410_5052",
254 .probe
= usb_serial_probe
,
255 .disconnect
= usb_serial_disconnect
,
256 .id_table
= ti_id_table_combined
,
260 static struct usb_serial_driver ti_1port_device
= {
262 .owner
= THIS_MODULE
,
263 .name
= "ti_usb_3410_5052_1",
265 .description
= "TI USB 3410 1 port adapter",
266 .usb_driver
= &ti_usb_driver
,
267 .id_table
= ti_id_table_3410
,
269 .attach
= ti_startup
,
270 .shutdown
= ti_shutdown
,
274 .write_room
= ti_write_room
,
275 .chars_in_buffer
= ti_chars_in_buffer
,
276 .throttle
= ti_throttle
,
277 .unthrottle
= ti_unthrottle
,
279 .set_termios
= ti_set_termios
,
280 .tiocmget
= ti_tiocmget
,
281 .tiocmset
= ti_tiocmset
,
282 .break_ctl
= ti_break
,
283 .read_int_callback
= ti_interrupt_callback
,
284 .read_bulk_callback
= ti_bulk_in_callback
,
285 .write_bulk_callback
= ti_bulk_out_callback
,
288 static struct usb_serial_driver ti_2port_device
= {
290 .owner
= THIS_MODULE
,
291 .name
= "ti_usb_3410_5052_2",
293 .description
= "TI USB 5052 2 port adapter",
294 .usb_driver
= &ti_usb_driver
,
295 .id_table
= ti_id_table_5052
,
297 .attach
= ti_startup
,
298 .shutdown
= ti_shutdown
,
302 .write_room
= ti_write_room
,
303 .chars_in_buffer
= ti_chars_in_buffer
,
304 .throttle
= ti_throttle
,
305 .unthrottle
= ti_unthrottle
,
307 .set_termios
= ti_set_termios
,
308 .tiocmget
= ti_tiocmget
,
309 .tiocmset
= ti_tiocmset
,
310 .break_ctl
= ti_break
,
311 .read_int_callback
= ti_interrupt_callback
,
312 .read_bulk_callback
= ti_bulk_in_callback
,
313 .write_bulk_callback
= ti_bulk_out_callback
,
319 MODULE_AUTHOR(TI_DRIVER_AUTHOR
);
320 MODULE_DESCRIPTION(TI_DRIVER_DESC
);
321 MODULE_VERSION(TI_DRIVER_VERSION
);
322 MODULE_LICENSE("GPL");
324 MODULE_FIRMWARE("ti_3410.fw");
325 MODULE_FIRMWARE("ti_5052.fw");
327 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
328 MODULE_PARM_DESC(debug
, "Enable debugging, 0=no, 1=yes");
330 module_param(low_latency
, bool, S_IRUGO
| S_IWUSR
);
331 MODULE_PARM_DESC(low_latency
,
332 "TTY low_latency flag, 0=off, 1=on, default is off");
334 module_param(closing_wait
, int, S_IRUGO
| S_IWUSR
);
335 MODULE_PARM_DESC(closing_wait
,
336 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
338 module_param_array(vendor_3410
, ushort
, &vendor_3410_count
, S_IRUGO
);
339 MODULE_PARM_DESC(vendor_3410
,
340 "Vendor ids for 3410 based devices, 1-5 short integers");
341 module_param_array(product_3410
, ushort
, &product_3410_count
, S_IRUGO
);
342 MODULE_PARM_DESC(product_3410
,
343 "Product ids for 3410 based devices, 1-5 short integers");
344 module_param_array(vendor_5052
, ushort
, &vendor_5052_count
, S_IRUGO
);
345 MODULE_PARM_DESC(vendor_5052
,
346 "Vendor ids for 5052 based devices, 1-5 short integers");
347 module_param_array(product_5052
, ushort
, &product_5052_count
, S_IRUGO
);
348 MODULE_PARM_DESC(product_5052
,
349 "Product ids for 5052 based devices, 1-5 short integers");
351 MODULE_DEVICE_TABLE(usb
, ti_id_table_combined
);
356 static int __init
ti_init(void)
361 /* insert extra vendor and product ids */
362 j
= ARRAY_SIZE(ti_id_table_3410
) - TI_EXTRA_VID_PID_COUNT
- 1;
363 for (i
= 0; i
< min(vendor_3410_count
, product_3410_count
); i
++, j
++) {
364 ti_id_table_3410
[j
].idVendor
= vendor_3410
[i
];
365 ti_id_table_3410
[j
].idProduct
= product_3410
[i
];
366 ti_id_table_3410
[j
].match_flags
= USB_DEVICE_ID_MATCH_DEVICE
;
368 j
= ARRAY_SIZE(ti_id_table_5052
) - TI_EXTRA_VID_PID_COUNT
- 1;
369 for (i
= 0; i
< min(vendor_5052_count
, product_5052_count
); i
++, j
++) {
370 ti_id_table_5052
[j
].idVendor
= vendor_5052
[i
];
371 ti_id_table_5052
[j
].idProduct
= product_5052
[i
];
372 ti_id_table_5052
[j
].match_flags
= USB_DEVICE_ID_MATCH_DEVICE
;
375 ret
= usb_serial_register(&ti_1port_device
);
378 ret
= usb_serial_register(&ti_2port_device
);
382 ret
= usb_register(&ti_usb_driver
);
386 info(TI_DRIVER_DESC
" " TI_DRIVER_VERSION
);
391 usb_serial_deregister(&ti_2port_device
);
393 usb_serial_deregister(&ti_1port_device
);
399 static void __exit
ti_exit(void)
401 usb_serial_deregister(&ti_1port_device
);
402 usb_serial_deregister(&ti_2port_device
);
403 usb_deregister(&ti_usb_driver
);
407 module_init(ti_init
);
408 module_exit(ti_exit
);
411 static int ti_startup(struct usb_serial
*serial
)
413 struct ti_device
*tdev
;
414 struct ti_port
*tport
;
415 struct usb_device
*dev
= serial
->dev
;
420 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
421 __func__
, le16_to_cpu(dev
->descriptor
.idProduct
),
422 dev
->descriptor
.bNumConfigurations
,
423 dev
->actconfig
->desc
.bConfigurationValue
);
425 /* create device structure */
426 tdev
= kzalloc(sizeof(struct ti_device
), GFP_KERNEL
);
428 dev_err(&dev
->dev
, "%s - out of memory\n", __func__
);
431 mutex_init(&tdev
->td_open_close_lock
);
432 tdev
->td_serial
= serial
;
433 usb_set_serial_data(serial
, tdev
);
435 /* determine device type */
436 if (usb_match_id(serial
->interface
, ti_id_table_3410
))
437 tdev
->td_is_3410
= 1;
438 dbg("%s - device type is %s", __func__
,
439 tdev
->td_is_3410
? "3410" : "5052");
441 /* if we have only 1 configuration, download firmware */
442 if (dev
->descriptor
.bNumConfigurations
== 1) {
443 if (tdev
->td_is_3410
)
444 status
= ti_download_firmware(tdev
, 3410);
446 status
= ti_download_firmware(tdev
, 5052);
450 /* 3410 must be reset, 5052 resets itself */
451 if (tdev
->td_is_3410
) {
452 msleep_interruptible(100);
453 usb_reset_device(dev
);
460 /* the second configuration must be set (in sysfs by hotplug script) */
461 if (dev
->actconfig
->desc
.bConfigurationValue
== TI_BOOT_CONFIG
) {
466 /* set up port structures */
467 for (i
= 0; i
< serial
->num_ports
; ++i
) {
468 tport
= kzalloc(sizeof(struct ti_port
), GFP_KERNEL
);
470 dev_err(&dev
->dev
, "%s - out of memory\n", __func__
);
474 spin_lock_init(&tport
->tp_lock
);
475 tport
->tp_uart_base_addr
= (i
== 0 ?
476 TI_UART1_BASE_ADDR
: TI_UART2_BASE_ADDR
);
477 tport
->tp_flags
= low_latency
? ASYNC_LOW_LATENCY
: 0;
478 tport
->tp_closing_wait
= closing_wait
;
479 init_waitqueue_head(&tport
->tp_msr_wait
);
480 init_waitqueue_head(&tport
->tp_write_wait
);
481 tport
->tp_write_buf
= ti_buf_alloc();
482 if (tport
->tp_write_buf
== NULL
) {
483 dev_err(&dev
->dev
, "%s - out of memory\n", __func__
);
488 tport
->tp_port
= serial
->port
[i
];
489 tport
->tp_tdev
= tdev
;
490 usb_set_serial_port_data(serial
->port
[i
], tport
);
491 tport
->tp_uart_mode
= 0; /* default is RS232 */
497 for (--i
; i
>= 0; --i
) {
498 tport
= usb_get_serial_port_data(serial
->port
[i
]);
499 ti_buf_free(tport
->tp_write_buf
);
501 usb_set_serial_port_data(serial
->port
[i
], NULL
);
505 usb_set_serial_data(serial
, NULL
);
510 static void ti_shutdown(struct usb_serial
*serial
)
513 struct ti_device
*tdev
= usb_get_serial_data(serial
);
514 struct ti_port
*tport
;
518 for (i
= 0; i
< serial
->num_ports
; ++i
) {
519 tport
= usb_get_serial_port_data(serial
->port
[i
]);
521 ti_buf_free(tport
->tp_write_buf
);
523 usb_set_serial_port_data(serial
->port
[i
], NULL
);
528 usb_set_serial_data(serial
, NULL
);
532 static int ti_open(struct tty_struct
*tty
,
533 struct usb_serial_port
*port
, struct file
*file
)
535 struct ti_port
*tport
= usb_get_serial_port_data(port
);
536 struct ti_device
*tdev
;
537 struct usb_device
*dev
;
541 __u16 open_settings
= (__u8
)(TI_PIPE_MODE_CONTINOUS
|
542 TI_PIPE_TIMEOUT_ENABLE
|
543 (TI_TRANSFER_TIMEOUT
<< 2));
545 dbg("%s - port %d", __func__
, port
->number
);
550 dev
= port
->serial
->dev
;
551 tdev
= tport
->tp_tdev
;
553 /* only one open on any port on a device at a time */
554 if (mutex_lock_interruptible(&tdev
->td_open_close_lock
))
559 (tport
->tp_flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
561 port_number
= port
->number
- port
->serial
->minor
;
563 memset(&(tport
->tp_icount
), 0x00, sizeof(tport
->tp_icount
));
566 tport
->tp_shadow_mcr
|= (TI_MCR_RTS
| TI_MCR_DTR
);
568 /* start interrupt urb the first time a port is opened on this device */
569 if (tdev
->td_open_port_count
== 0) {
570 dbg("%s - start interrupt in urb", __func__
);
571 urb
= tdev
->td_serial
->port
[0]->interrupt_in_urb
;
573 dev_err(&port
->dev
, "%s - no interrupt urb\n",
578 urb
->complete
= ti_interrupt_callback
;
581 status
= usb_submit_urb(urb
, GFP_KERNEL
);
584 "%s - submit interrupt urb failed, %d\n",
591 ti_set_termios(tty
, port
, tty
->termios
);
593 dbg("%s - sending TI_OPEN_PORT", __func__
);
594 status
= ti_command_out_sync(tdev
, TI_OPEN_PORT
,
595 (__u8
)(TI_UART1_PORT
+ port_number
), open_settings
, NULL
, 0);
597 dev_err(&port
->dev
, "%s - cannot send open command, %d\n",
602 dbg("%s - sending TI_START_PORT", __func__
);
603 status
= ti_command_out_sync(tdev
, TI_START_PORT
,
604 (__u8
)(TI_UART1_PORT
+ port_number
), 0, NULL
, 0);
606 dev_err(&port
->dev
, "%s - cannot send start command, %d\n",
611 dbg("%s - sending TI_PURGE_PORT", __func__
);
612 status
= ti_command_out_sync(tdev
, TI_PURGE_PORT
,
613 (__u8
)(TI_UART1_PORT
+ port_number
), TI_PURGE_INPUT
, NULL
, 0);
615 dev_err(&port
->dev
, "%s - cannot clear input buffers, %d\n",
619 status
= ti_command_out_sync(tdev
, TI_PURGE_PORT
,
620 (__u8
)(TI_UART1_PORT
+ port_number
), TI_PURGE_OUTPUT
, NULL
, 0);
622 dev_err(&port
->dev
, "%s - cannot clear output buffers, %d\n",
627 /* reset the data toggle on the bulk endpoints to work around bug in
628 * host controllers where things get out of sync some times */
629 usb_clear_halt(dev
, port
->write_urb
->pipe
);
630 usb_clear_halt(dev
, port
->read_urb
->pipe
);
633 ti_set_termios(tty
, port
, tty
->termios
);
635 dbg("%s - sending TI_OPEN_PORT (2)", __func__
);
636 status
= ti_command_out_sync(tdev
, TI_OPEN_PORT
,
637 (__u8
)(TI_UART1_PORT
+ port_number
), open_settings
, NULL
, 0);
639 dev_err(&port
->dev
, "%s - cannot send open command (2), %d\n",
644 dbg("%s - sending TI_START_PORT (2)", __func__
);
645 status
= ti_command_out_sync(tdev
, TI_START_PORT
,
646 (__u8
)(TI_UART1_PORT
+ port_number
), 0, NULL
, 0);
648 dev_err(&port
->dev
, "%s - cannot send start command (2), %d\n",
654 dbg("%s - start read urb", __func__
);
655 urb
= port
->read_urb
;
657 dev_err(&port
->dev
, "%s - no read urb\n", __func__
);
661 tport
->tp_read_urb_state
= TI_READ_URB_RUNNING
;
662 urb
->complete
= ti_bulk_in_callback
;
663 urb
->context
= tport
;
665 status
= usb_submit_urb(urb
, GFP_KERNEL
);
667 dev_err(&port
->dev
, "%s - submit read urb failed, %d\n",
672 tport
->tp_is_open
= 1;
673 ++tdev
->td_open_port_count
;
678 if (tdev
->td_open_port_count
== 0)
679 usb_kill_urb(port
->serial
->port
[0]->interrupt_in_urb
);
681 mutex_unlock(&tdev
->td_open_close_lock
);
682 dbg("%s - exit %d", __func__
, status
);
687 static void ti_close(struct tty_struct
*tty
, struct usb_serial_port
*port
,
690 struct ti_device
*tdev
;
691 struct ti_port
*tport
;
696 dbg("%s - port %d", __func__
, port
->number
);
698 tdev
= usb_get_serial_data(port
->serial
);
699 tport
= usb_get_serial_port_data(port
);
700 if (tdev
== NULL
|| tport
== NULL
)
703 tport
->tp_is_open
= 0;
705 ti_drain(tport
, (tport
->tp_closing_wait
*HZ
)/100, 1);
707 usb_kill_urb(port
->read_urb
);
708 usb_kill_urb(port
->write_urb
);
709 tport
->tp_write_urb_in_use
= 0;
711 port_number
= port
->number
- port
->serial
->minor
;
713 dbg("%s - sending TI_CLOSE_PORT", __func__
);
714 status
= ti_command_out_sync(tdev
, TI_CLOSE_PORT
,
715 (__u8
)(TI_UART1_PORT
+ port_number
), 0, NULL
, 0);
718 "%s - cannot send close port command, %d\n"
721 /* if mutex_lock is interrupted, continue anyway */
722 do_unlock
= !mutex_lock_interruptible(&tdev
->td_open_close_lock
);
723 --tport
->tp_tdev
->td_open_port_count
;
724 if (tport
->tp_tdev
->td_open_port_count
<= 0) {
725 /* last port is closed, shut down interrupt urb */
726 usb_kill_urb(port
->serial
->port
[0]->interrupt_in_urb
);
727 tport
->tp_tdev
->td_open_port_count
= 0;
730 mutex_unlock(&tdev
->td_open_close_lock
);
732 dbg("%s - exit", __func__
);
736 static int ti_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
737 const unsigned char *data
, int count
)
739 struct ti_port
*tport
= usb_get_serial_port_data(port
);
742 dbg("%s - port %d", __func__
, port
->number
);
745 dbg("%s - write request of 0 bytes", __func__
);
749 if (tport
== NULL
|| !tport
->tp_is_open
)
752 spin_lock_irqsave(&tport
->tp_lock
, flags
);
753 count
= ti_buf_put(tport
->tp_write_buf
, data
, count
);
754 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
762 static int ti_write_room(struct tty_struct
*tty
)
764 struct usb_serial_port
*port
= tty
->driver_data
;
765 struct ti_port
*tport
= usb_get_serial_port_data(port
);
769 dbg("%s - port %d", __func__
, port
->number
);
774 spin_lock_irqsave(&tport
->tp_lock
, flags
);
775 room
= ti_buf_space_avail(tport
->tp_write_buf
);
776 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
778 dbg("%s - returns %d", __func__
, room
);
783 static int ti_chars_in_buffer(struct tty_struct
*tty
)
785 struct usb_serial_port
*port
= tty
->driver_data
;
786 struct ti_port
*tport
= usb_get_serial_port_data(port
);
790 dbg("%s - port %d", __func__
, port
->number
);
795 spin_lock_irqsave(&tport
->tp_lock
, flags
);
796 chars
= ti_buf_data_avail(tport
->tp_write_buf
);
797 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
799 dbg("%s - returns %d", __func__
, chars
);
804 static void ti_throttle(struct tty_struct
*tty
)
806 struct usb_serial_port
*port
= tty
->driver_data
;
807 struct ti_port
*tport
= usb_get_serial_port_data(port
);
809 dbg("%s - port %d", __func__
, port
->number
);
814 if (I_IXOFF(tty
) || C_CRTSCTS(tty
))
815 ti_stop_read(tport
, tty
);
820 static void ti_unthrottle(struct tty_struct
*tty
)
822 struct usb_serial_port
*port
= tty
->driver_data
;
823 struct ti_port
*tport
= usb_get_serial_port_data(port
);
826 dbg("%s - port %d", __func__
, port
->number
);
831 if (I_IXOFF(tty
) || C_CRTSCTS(tty
)) {
832 status
= ti_restart_read(tport
, tty
);
834 dev_err(&port
->dev
, "%s - cannot restart read, %d\n",
840 static int ti_ioctl(struct tty_struct
*tty
, struct file
*file
,
841 unsigned int cmd
, unsigned long arg
)
843 struct usb_serial_port
*port
= tty
->driver_data
;
844 struct ti_port
*tport
= usb_get_serial_port_data(port
);
845 struct async_icount cnow
;
846 struct async_icount cprev
;
848 dbg("%s - port %d, cmd = 0x%04X", __func__
, port
->number
, cmd
);
855 dbg("%s - (%d) TIOCGSERIAL", __func__
, port
->number
);
856 return ti_get_serial_info(tport
,
857 (struct serial_struct __user
*)arg
);
859 dbg("%s - (%d) TIOCSSERIAL", __func__
, port
->number
);
860 return ti_set_serial_info(tport
,
861 (struct serial_struct __user
*)arg
);
863 dbg("%s - (%d) TIOCMIWAIT", __func__
, port
->number
);
864 cprev
= tport
->tp_icount
;
866 interruptible_sleep_on(&tport
->tp_msr_wait
);
867 if (signal_pending(current
))
869 cnow
= tport
->tp_icount
;
870 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
871 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
872 return -EIO
; /* no change => error */
873 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
874 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
875 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
876 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
)))
882 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
883 __func__
, port
->number
,
884 tport
->tp_icount
.rx
, tport
->tp_icount
.tx
);
885 if (copy_to_user((void __user
*)arg
, &tport
->tp_icount
,
886 sizeof(tport
->tp_icount
)))
894 static void ti_set_termios(struct tty_struct
*tty
,
895 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
897 struct ti_port
*tport
= usb_get_serial_port_data(port
);
898 struct ti_uart_config
*config
;
899 tcflag_t cflag
, iflag
;
902 int port_number
= port
->number
- port
->serial
->minor
;
905 dbg("%s - port %d", __func__
, port
->number
);
907 cflag
= tty
->termios
->c_cflag
;
908 iflag
= tty
->termios
->c_iflag
;
910 dbg("%s - cflag %08x, iflag %08x", __func__
, cflag
, iflag
);
911 dbg("%s - old clfag %08x, old iflag %08x", __func__
,
912 old_termios
->c_cflag
, old_termios
->c_iflag
);
917 config
= kmalloc(sizeof(*config
), GFP_KERNEL
);
919 dev_err(&port
->dev
, "%s - out of memory\n", __func__
);
925 /* these flags must be set */
926 config
->wFlags
|= TI_UART_ENABLE_MS_INTS
;
927 config
->wFlags
|= TI_UART_ENABLE_AUTO_START_DMA
;
928 config
->bUartMode
= (__u8
)(tport
->tp_uart_mode
);
930 switch (cflag
& CSIZE
) {
932 config
->bDataBits
= TI_UART_5_DATA_BITS
;
935 config
->bDataBits
= TI_UART_6_DATA_BITS
;
938 config
->bDataBits
= TI_UART_7_DATA_BITS
;
942 config
->bDataBits
= TI_UART_8_DATA_BITS
;
946 /* CMSPAR isn't supported by this driver */
947 tty
->termios
->c_cflag
&= ~CMSPAR
;
949 if (cflag
& PARENB
) {
950 if (cflag
& PARODD
) {
951 config
->wFlags
|= TI_UART_ENABLE_PARITY_CHECKING
;
952 config
->bParity
= TI_UART_ODD_PARITY
;
954 config
->wFlags
|= TI_UART_ENABLE_PARITY_CHECKING
;
955 config
->bParity
= TI_UART_EVEN_PARITY
;
958 config
->wFlags
&= ~TI_UART_ENABLE_PARITY_CHECKING
;
959 config
->bParity
= TI_UART_NO_PARITY
;
963 config
->bStopBits
= TI_UART_2_STOP_BITS
;
965 config
->bStopBits
= TI_UART_1_STOP_BITS
;
967 if (cflag
& CRTSCTS
) {
968 /* RTS flow control must be off to drop RTS for baud rate B0 */
969 if ((cflag
& CBAUD
) != B0
)
970 config
->wFlags
|= TI_UART_ENABLE_RTS_IN
;
971 config
->wFlags
|= TI_UART_ENABLE_CTS_OUT
;
974 ti_restart_read(tport
, tty
);
977 if (I_IXOFF(tty
) || I_IXON(tty
)) {
978 config
->cXon
= START_CHAR(tty
);
979 config
->cXoff
= STOP_CHAR(tty
);
982 config
->wFlags
|= TI_UART_ENABLE_X_IN
;
984 ti_restart_read(tport
, tty
);
987 config
->wFlags
|= TI_UART_ENABLE_X_OUT
;
990 baud
= tty_get_baud_rate(tty
);
993 if (tport
->tp_tdev
->td_is_3410
)
994 config
->wBaudRate
= (__u16
)((923077 + baud
/2) / baud
);
996 config
->wBaudRate
= (__u16
)((461538 + baud
/2) / baud
);
998 /* FIXME: Should calculate resulting baud here and report it back */
999 if ((cflag
& CBAUD
) != B0
)
1000 tty_encode_baud_rate(tty
, baud
, baud
);
1002 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
1003 __func__
, baud
, config
->wBaudRate
, config
->wFlags
, config
->bDataBits
, config
->bParity
, config
->bStopBits
, config
->cXon
, config
->cXoff
, config
->bUartMode
);
1005 cpu_to_be16s(&config
->wBaudRate
);
1006 cpu_to_be16s(&config
->wFlags
);
1008 status
= ti_command_out_sync(tport
->tp_tdev
, TI_SET_CONFIG
,
1009 (__u8
)(TI_UART1_PORT
+ port_number
), 0, (__u8
*)config
,
1012 dev_err(&port
->dev
, "%s - cannot set config on port %d, %d\n",
1013 __func__
, port_number
, status
);
1015 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1016 mcr
= tport
->tp_shadow_mcr
;
1017 /* if baud rate is B0, clear RTS and DTR */
1018 if ((cflag
& CBAUD
) == B0
)
1019 mcr
&= ~(TI_MCR_DTR
| TI_MCR_RTS
);
1020 status
= ti_set_mcr(tport
, mcr
);
1023 "%s - cannot set modem control on port %d, %d\n",
1024 __func__
, port_number
, status
);
1030 static int ti_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1032 struct usb_serial_port
*port
= tty
->driver_data
;
1033 struct ti_port
*tport
= usb_get_serial_port_data(port
);
1034 unsigned int result
;
1037 unsigned long flags
;
1039 dbg("%s - port %d", __func__
, port
->number
);
1044 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1045 msr
= tport
->tp_msr
;
1046 mcr
= tport
->tp_shadow_mcr
;
1047 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1049 result
= ((mcr
& TI_MCR_DTR
) ? TIOCM_DTR
: 0)
1050 | ((mcr
& TI_MCR_RTS
) ? TIOCM_RTS
: 0)
1051 | ((mcr
& TI_MCR_LOOP
) ? TIOCM_LOOP
: 0)
1052 | ((msr
& TI_MSR_CTS
) ? TIOCM_CTS
: 0)
1053 | ((msr
& TI_MSR_CD
) ? TIOCM_CAR
: 0)
1054 | ((msr
& TI_MSR_RI
) ? TIOCM_RI
: 0)
1055 | ((msr
& TI_MSR_DSR
) ? TIOCM_DSR
: 0);
1057 dbg("%s - 0x%04X", __func__
, result
);
1063 static int ti_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1064 unsigned int set
, unsigned int clear
)
1066 struct usb_serial_port
*port
= tty
->driver_data
;
1067 struct ti_port
*tport
= usb_get_serial_port_data(port
);
1069 unsigned long flags
;
1071 dbg("%s - port %d", __func__
, port
->number
);
1076 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1077 mcr
= tport
->tp_shadow_mcr
;
1079 if (set
& TIOCM_RTS
)
1081 if (set
& TIOCM_DTR
)
1083 if (set
& TIOCM_LOOP
)
1086 if (clear
& TIOCM_RTS
)
1088 if (clear
& TIOCM_DTR
)
1090 if (clear
& TIOCM_LOOP
)
1091 mcr
&= ~TI_MCR_LOOP
;
1092 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1094 return ti_set_mcr(tport
, mcr
);
1098 static void ti_break(struct tty_struct
*tty
, int break_state
)
1100 struct usb_serial_port
*port
= tty
->driver_data
;
1101 struct ti_port
*tport
= usb_get_serial_port_data(port
);
1104 dbg("%s - state = %d", __func__
, break_state
);
1109 ti_drain(tport
, (tport
->tp_closing_wait
*HZ
)/100, 0);
1111 status
= ti_write_byte(tport
->tp_tdev
,
1112 tport
->tp_uart_base_addr
+ TI_UART_OFFSET_LCR
,
1113 TI_LCR_BREAK
, break_state
== -1 ? TI_LCR_BREAK
: 0);
1116 dbg("%s - error setting break, %d", __func__
, status
);
1120 static void ti_interrupt_callback(struct urb
*urb
)
1122 struct ti_device
*tdev
= urb
->context
;
1123 struct usb_serial_port
*port
;
1124 struct usb_serial
*serial
= tdev
->td_serial
;
1125 struct ti_port
*tport
;
1126 struct device
*dev
= &urb
->dev
->dev
;
1127 unsigned char *data
= urb
->transfer_buffer
;
1128 int length
= urb
->actual_length
;
1131 int status
= urb
->status
;
1135 dbg("%s", __func__
);
1143 dbg("%s - urb shutting down, %d", __func__
, status
);
1144 tdev
->td_urb_error
= 1;
1147 dev_err(dev
, "%s - nonzero urb status, %d\n",
1149 tdev
->td_urb_error
= 1;
1154 dbg("%s - bad packet size, %d", __func__
, length
);
1158 if (data
[0] == TI_CODE_HARDWARE_ERROR
) {
1159 dev_err(dev
, "%s - hardware error, %d\n", __func__
, data
[1]);
1163 port_number
= TI_GET_PORT_FROM_CODE(data
[0]);
1164 function
= TI_GET_FUNC_FROM_CODE(data
[0]);
1166 dbg("%s - port_number %d, function %d, data 0x%02X",
1167 __func__
, port_number
, function
, data
[1]);
1169 if (port_number
>= serial
->num_ports
) {
1170 dev_err(dev
, "%s - bad port number, %d\n",
1171 __func__
, port_number
);
1175 port
= serial
->port
[port_number
];
1177 tport
= usb_get_serial_port_data(port
);
1182 case TI_CODE_DATA_ERROR
:
1183 dev_err(dev
, "%s - DATA ERROR, port %d, data 0x%02X\n",
1184 __func__
, port_number
, data
[1]);
1187 case TI_CODE_MODEM_STATUS
:
1189 dbg("%s - port %d, msr 0x%02X", __func__
, port_number
, msr
);
1190 ti_handle_new_msr(tport
, msr
);
1194 dev_err(dev
, "%s - unknown interrupt code, 0x%02X\n",
1200 retval
= usb_submit_urb(urb
, GFP_ATOMIC
);
1202 dev_err(dev
, "%s - resubmit interrupt urb failed, %d\n",
1207 static void ti_bulk_in_callback(struct urb
*urb
)
1209 struct ti_port
*tport
= urb
->context
;
1210 struct usb_serial_port
*port
= tport
->tp_port
;
1211 struct device
*dev
= &urb
->dev
->dev
;
1212 int status
= urb
->status
;
1215 dbg("%s", __func__
);
1223 dbg("%s - urb shutting down, %d", __func__
, status
);
1224 tport
->tp_tdev
->td_urb_error
= 1;
1225 wake_up_interruptible(&tport
->tp_write_wait
);
1228 dev_err(dev
, "%s - nonzero urb status, %d\n",
1230 tport
->tp_tdev
->td_urb_error
= 1;
1231 wake_up_interruptible(&tport
->tp_write_wait
);
1234 if (status
== -EPIPE
)
1238 dev_err(dev
, "%s - stopping read!\n", __func__
);
1242 if (port
->port
.tty
&& urb
->actual_length
) {
1243 usb_serial_debug_data(debug
, dev
, __func__
,
1244 urb
->actual_length
, urb
->transfer_buffer
);
1246 if (!tport
->tp_is_open
)
1247 dbg("%s - port closed, dropping data", __func__
);
1249 ti_recv(&urb
->dev
->dev
, port
->port
.tty
,
1250 urb
->transfer_buffer
,
1251 urb
->actual_length
);
1253 spin_lock(&tport
->tp_lock
);
1254 tport
->tp_icount
.rx
+= urb
->actual_length
;
1255 spin_unlock(&tport
->tp_lock
);
1259 /* continue to read unless stopping */
1260 spin_lock(&tport
->tp_lock
);
1261 if (tport
->tp_read_urb_state
== TI_READ_URB_RUNNING
) {
1262 urb
->dev
= port
->serial
->dev
;
1263 retval
= usb_submit_urb(urb
, GFP_ATOMIC
);
1264 } else if (tport
->tp_read_urb_state
== TI_READ_URB_STOPPING
) {
1265 tport
->tp_read_urb_state
= TI_READ_URB_STOPPED
;
1267 spin_unlock(&tport
->tp_lock
);
1269 dev_err(dev
, "%s - resubmit read urb failed, %d\n",
1274 static void ti_bulk_out_callback(struct urb
*urb
)
1276 struct ti_port
*tport
= urb
->context
;
1277 struct usb_serial_port
*port
= tport
->tp_port
;
1278 struct device
*dev
= &urb
->dev
->dev
;
1279 int status
= urb
->status
;
1281 dbg("%s - port %d", __func__
, port
->number
);
1283 tport
->tp_write_urb_in_use
= 0;
1291 dbg("%s - urb shutting down, %d", __func__
, status
);
1292 tport
->tp_tdev
->td_urb_error
= 1;
1293 wake_up_interruptible(&tport
->tp_write_wait
);
1296 dev_err(dev
, "%s - nonzero urb status, %d\n",
1298 tport
->tp_tdev
->td_urb_error
= 1;
1299 wake_up_interruptible(&tport
->tp_write_wait
);
1302 /* send any buffered data */
1307 static void ti_recv(struct device
*dev
, struct tty_struct
*tty
,
1308 unsigned char *data
, int length
)
1313 cnt
= tty_buffer_request_room(tty
, length
);
1315 dev_err(dev
, "%s - dropping data, %d bytes lost\n",
1316 __func__
, length
- cnt
);
1320 tty_insert_flip_string(tty
, data
, cnt
);
1321 tty_flip_buffer_push(tty
);
1324 } while (length
> 0);
1329 static void ti_send(struct ti_port
*tport
)
1332 struct usb_serial_port
*port
= tport
->tp_port
;
1333 struct tty_struct
*tty
= port
->port
.tty
; /* FIXME */
1334 unsigned long flags
;
1337 dbg("%s - port %d", __func__
, port
->number
);
1339 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1341 if (tport
->tp_write_urb_in_use
) {
1342 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1346 count
= ti_buf_get(tport
->tp_write_buf
,
1347 port
->write_urb
->transfer_buffer
,
1348 port
->bulk_out_size
);
1351 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1355 tport
->tp_write_urb_in_use
= 1;
1357 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1359 usb_serial_debug_data(debug
, &port
->dev
, __func__
, count
,
1360 port
->write_urb
->transfer_buffer
);
1362 usb_fill_bulk_urb(port
->write_urb
, port
->serial
->dev
,
1363 usb_sndbulkpipe(port
->serial
->dev
,
1364 port
->bulk_out_endpointAddress
),
1365 port
->write_urb
->transfer_buffer
, count
,
1366 ti_bulk_out_callback
, tport
);
1368 result
= usb_submit_urb(port
->write_urb
, GFP_ATOMIC
);
1370 dev_err(&port
->dev
, "%s - submit write urb failed, %d\n",
1372 tport
->tp_write_urb_in_use
= 0;
1373 /* TODO: reschedule ti_send */
1375 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1376 tport
->tp_icount
.tx
+= count
;
1377 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1380 /* more room in the buffer for new writes, wakeup */
1383 wake_up_interruptible(&tport
->tp_write_wait
);
1387 static int ti_set_mcr(struct ti_port
*tport
, unsigned int mcr
)
1389 unsigned long flags
;
1392 status
= ti_write_byte(tport
->tp_tdev
,
1393 tport
->tp_uart_base_addr
+ TI_UART_OFFSET_MCR
,
1394 TI_MCR_RTS
| TI_MCR_DTR
| TI_MCR_LOOP
, mcr
);
1396 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1398 tport
->tp_shadow_mcr
= mcr
;
1399 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1405 static int ti_get_lsr(struct ti_port
*tport
)
1408 struct ti_device
*tdev
= tport
->tp_tdev
;
1409 struct usb_serial_port
*port
= tport
->tp_port
;
1410 int port_number
= port
->number
- port
->serial
->minor
;
1411 struct ti_port_status
*data
;
1413 dbg("%s - port %d", __func__
, port
->number
);
1415 size
= sizeof(struct ti_port_status
);
1416 data
= kmalloc(size
, GFP_KERNEL
);
1418 dev_err(&port
->dev
, "%s - out of memory\n", __func__
);
1422 status
= ti_command_in_sync(tdev
, TI_GET_PORT_STATUS
,
1423 (__u8
)(TI_UART1_PORT
+port_number
), 0, (__u8
*)data
, size
);
1426 "%s - get port status command failed, %d\n",
1431 dbg("%s - lsr 0x%02X", __func__
, data
->bLSR
);
1433 tport
->tp_lsr
= data
->bLSR
;
1441 static int ti_get_serial_info(struct ti_port
*tport
,
1442 struct serial_struct __user
*ret_arg
)
1444 struct usb_serial_port
*port
= tport
->tp_port
;
1445 struct serial_struct ret_serial
;
1450 memset(&ret_serial
, 0, sizeof(ret_serial
));
1452 ret_serial
.type
= PORT_16550A
;
1453 ret_serial
.line
= port
->serial
->minor
;
1454 ret_serial
.port
= port
->number
- port
->serial
->minor
;
1455 ret_serial
.flags
= tport
->tp_flags
;
1456 ret_serial
.xmit_fifo_size
= TI_WRITE_BUF_SIZE
;
1457 ret_serial
.baud_base
= tport
->tp_tdev
->td_is_3410
? 921600 : 460800;
1458 ret_serial
.closing_wait
= tport
->tp_closing_wait
;
1460 if (copy_to_user(ret_arg
, &ret_serial
, sizeof(*ret_arg
)))
1467 static int ti_set_serial_info(struct ti_port
*tport
,
1468 struct serial_struct __user
*new_arg
)
1470 struct usb_serial_port
*port
= tport
->tp_port
;
1471 struct serial_struct new_serial
;
1473 if (copy_from_user(&new_serial
, new_arg
, sizeof(new_serial
)))
1476 tport
->tp_flags
= new_serial
.flags
& TI_SET_SERIAL_FLAGS
;
1479 port
->port
.tty
->low_latency
=
1480 (tport
->tp_flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1481 tport
->tp_closing_wait
= new_serial
.closing_wait
;
1487 static void ti_handle_new_msr(struct ti_port
*tport
, __u8 msr
)
1489 struct async_icount
*icount
;
1490 struct tty_struct
*tty
;
1491 unsigned long flags
;
1493 dbg("%s - msr 0x%02X", __func__
, msr
);
1495 if (msr
& TI_MSR_DELTA_MASK
) {
1496 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1497 icount
= &tport
->tp_icount
;
1498 if (msr
& TI_MSR_DELTA_CTS
)
1500 if (msr
& TI_MSR_DELTA_DSR
)
1502 if (msr
& TI_MSR_DELTA_CD
)
1504 if (msr
& TI_MSR_DELTA_RI
)
1506 wake_up_interruptible(&tport
->tp_msr_wait
);
1507 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1510 tport
->tp_msr
= msr
& TI_MSR_MASK
;
1512 /* handle CTS flow control */
1513 tty
= tport
->tp_port
->port
.tty
;
1514 if (tty
&& C_CRTSCTS(tty
)) {
1515 if (msr
& TI_MSR_CTS
) {
1516 tty
->hw_stopped
= 0;
1519 tty
->hw_stopped
= 1;
1525 static void ti_drain(struct ti_port
*tport
, unsigned long timeout
, int flush
)
1527 struct ti_device
*tdev
= tport
->tp_tdev
;
1528 struct usb_serial_port
*port
= tport
->tp_port
;
1531 dbg("%s - port %d", __func__
, port
->number
);
1533 spin_lock_irq(&tport
->tp_lock
);
1535 /* wait for data to drain from the buffer */
1536 tdev
->td_urb_error
= 0;
1537 init_waitqueue_entry(&wait
, current
);
1538 add_wait_queue(&tport
->tp_write_wait
, &wait
);
1540 set_current_state(TASK_INTERRUPTIBLE
);
1541 if (ti_buf_data_avail(tport
->tp_write_buf
) == 0
1542 || timeout
== 0 || signal_pending(current
)
1543 || tdev
->td_urb_error
1544 || port
->serial
->disconnected
) /* disconnect */
1546 spin_unlock_irq(&tport
->tp_lock
);
1547 timeout
= schedule_timeout(timeout
);
1548 spin_lock_irq(&tport
->tp_lock
);
1550 set_current_state(TASK_RUNNING
);
1551 remove_wait_queue(&tport
->tp_write_wait
, &wait
);
1553 /* flush any remaining data in the buffer */
1555 ti_buf_clear(tport
->tp_write_buf
);
1557 spin_unlock_irq(&tport
->tp_lock
);
1559 mutex_lock(&port
->serial
->disc_mutex
);
1560 /* wait for data to drain from the device */
1561 /* wait for empty tx register, plus 20 ms */
1563 tport
->tp_lsr
&= ~TI_LSR_TX_EMPTY
;
1564 while ((long)(jiffies
- timeout
) < 0 && !signal_pending(current
)
1565 && !(tport
->tp_lsr
&TI_LSR_TX_EMPTY
) && !tdev
->td_urb_error
1566 && !port
->serial
->disconnected
) {
1567 if (ti_get_lsr(tport
))
1569 mutex_unlock(&port
->serial
->disc_mutex
);
1570 msleep_interruptible(20);
1571 mutex_lock(&port
->serial
->disc_mutex
);
1573 mutex_unlock(&port
->serial
->disc_mutex
);
1577 static void ti_stop_read(struct ti_port
*tport
, struct tty_struct
*tty
)
1579 unsigned long flags
;
1581 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1583 if (tport
->tp_read_urb_state
== TI_READ_URB_RUNNING
)
1584 tport
->tp_read_urb_state
= TI_READ_URB_STOPPING
;
1586 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1590 static int ti_restart_read(struct ti_port
*tport
, struct tty_struct
*tty
)
1594 unsigned long flags
;
1596 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1598 if (tport
->tp_read_urb_state
== TI_READ_URB_STOPPED
) {
1599 tport
->tp_read_urb_state
= TI_READ_URB_RUNNING
;
1600 urb
= tport
->tp_port
->read_urb
;
1601 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1602 urb
->complete
= ti_bulk_in_callback
;
1603 urb
->context
= tport
;
1604 urb
->dev
= tport
->tp_port
->serial
->dev
;
1605 status
= usb_submit_urb(urb
, GFP_KERNEL
);
1607 tport
->tp_read_urb_state
= TI_READ_URB_RUNNING
;
1608 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1615 static int ti_command_out_sync(struct ti_device
*tdev
, __u8 command
,
1616 __u16 moduleid
, __u16 value
, __u8
*data
, int size
)
1620 status
= usb_control_msg(tdev
->td_serial
->dev
,
1621 usb_sndctrlpipe(tdev
->td_serial
->dev
, 0), command
,
1622 (USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_OUT
),
1623 value
, moduleid
, data
, size
, 1000);
1635 static int ti_command_in_sync(struct ti_device
*tdev
, __u8 command
,
1636 __u16 moduleid
, __u16 value
, __u8
*data
, int size
)
1640 status
= usb_control_msg(tdev
->td_serial
->dev
,
1641 usb_rcvctrlpipe(tdev
->td_serial
->dev
, 0), command
,
1642 (USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
),
1643 value
, moduleid
, data
, size
, 1000);
1655 static int ti_write_byte(struct ti_device
*tdev
, unsigned long addr
,
1656 __u8 mask
, __u8 byte
)
1660 struct ti_write_data_bytes
*data
;
1661 struct device
*dev
= &tdev
->td_serial
->dev
->dev
;
1663 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1664 __func__
, addr
, mask
, byte
);
1666 size
= sizeof(struct ti_write_data_bytes
) + 2;
1667 data
= kmalloc(size
, GFP_KERNEL
);
1669 dev_err(dev
, "%s - out of memory\n", __func__
);
1673 data
->bAddrType
= TI_RW_DATA_ADDR_XDATA
;
1674 data
->bDataType
= TI_RW_DATA_BYTE
;
1675 data
->bDataCounter
= 1;
1676 data
->wBaseAddrHi
= cpu_to_be16(addr
>>16);
1677 data
->wBaseAddrLo
= cpu_to_be16(addr
);
1678 data
->bData
[0] = mask
;
1679 data
->bData
[1] = byte
;
1681 status
= ti_command_out_sync(tdev
, TI_WRITE_DATA
, TI_RAM_PORT
, 0,
1682 (__u8
*)data
, size
);
1685 dev_err(dev
, "%s - failed, %d\n", __func__
, status
);
1692 static int ti_do_download(struct usb_device
*dev
, int pipe
,
1693 u8
*buffer
, int size
)
1698 struct ti_firmware_header
*header
;
1702 for (pos
= sizeof(struct ti_firmware_header
); pos
< size
; pos
++)
1703 cs
= (__u8
)(cs
+ buffer
[pos
]);
1705 header
= (struct ti_firmware_header
*)buffer
;
1706 header
->wLength
= cpu_to_le16((__u16
)(size
1707 - sizeof(struct ti_firmware_header
)));
1708 header
->bCheckSum
= cs
;
1710 dbg("%s - downloading firmware", __func__
);
1711 for (pos
= 0; pos
< size
; pos
+= done
) {
1712 len
= min(size
- pos
, TI_DOWNLOAD_MAX_PACKET_SIZE
);
1713 status
= usb_bulk_msg(dev
, pipe
, buffer
+ pos
, len
,
1721 static int ti_download_firmware(struct ti_device
*tdev
, int type
)
1723 int status
= -ENOMEM
;
1726 struct usb_device
*dev
= tdev
->td_serial
->dev
;
1727 unsigned int pipe
= usb_sndbulkpipe(dev
,
1728 tdev
->td_serial
->port
[0]->bulk_out_endpointAddress
);
1729 const struct firmware
*fw_p
;
1731 sprintf(buf
, "ti_usb-%d.bin", type
);
1733 if (request_firmware(&fw_p
, buf
, &dev
->dev
)) {
1734 dev_err(&dev
->dev
, "%s - firmware not found\n", __func__
);
1737 if (fw_p
->size
> TI_FIRMWARE_BUF_SIZE
) {
1738 dev_err(&dev
->dev
, "%s - firmware too large\n", __func__
);
1742 buffer_size
= TI_FIRMWARE_BUF_SIZE
+ sizeof(struct ti_firmware_header
);
1743 buffer
= kmalloc(buffer_size
, GFP_KERNEL
);
1745 memcpy(buffer
, fw_p
->data
, fw_p
->size
);
1746 memset(buffer
+ fw_p
->size
, 0xff, buffer_size
- fw_p
->size
);
1747 ti_do_download(dev
, pipe
, buffer
, fw_p
->size
);
1750 release_firmware(fw_p
);
1752 dev_err(&dev
->dev
, "%s - error downloading firmware, %d\n",
1757 dbg("%s - download successful", __func__
);
1763 /* Circular Buffer Functions */
1768 * Allocate a circular buffer and all associated memory.
1771 static struct circ_buf
*ti_buf_alloc(void)
1773 struct circ_buf
*cb
;
1775 cb
= kmalloc(sizeof(struct circ_buf
), GFP_KERNEL
);
1779 cb
->buf
= kmalloc(TI_WRITE_BUF_SIZE
, GFP_KERNEL
);
1780 if (cb
->buf
== NULL
) {
1794 * Free the buffer and all associated memory.
1797 static void ti_buf_free(struct circ_buf
*cb
)
1807 * Clear out all data in the circular buffer.
1810 static void ti_buf_clear(struct circ_buf
*cb
)
1812 cb
->head
= cb
->tail
= 0;
1819 * Return the number of bytes of data available in the circular
1823 static int ti_buf_data_avail(struct circ_buf
*cb
)
1825 return CIRC_CNT(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1830 * ti_buf_space_avail
1832 * Return the number of bytes of space available in the circular
1836 static int ti_buf_space_avail(struct circ_buf
*cb
)
1838 return CIRC_SPACE(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1845 * Copy data data from a user buffer and put it into the circular buffer.
1846 * Restrict to the amount of space available.
1848 * Return the number of bytes copied.
1851 static int ti_buf_put(struct circ_buf
*cb
, const char *buf
, int count
)
1856 c
= CIRC_SPACE_TO_END(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1861 memcpy(cb
->buf
+ cb
->head
, buf
, c
);
1862 cb
->head
= (cb
->head
+ c
) & (TI_WRITE_BUF_SIZE
-1);
1875 * Get data from the circular buffer and copy to the given buffer.
1876 * Restrict to the amount of data available.
1878 * Return the number of bytes copied.
1881 static int ti_buf_get(struct circ_buf
*cb
, char *buf
, int count
)
1886 c
= CIRC_CNT_TO_END(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1891 memcpy(buf
, cb
->buf
+ cb
->tail
, c
);
1892 cb
->tail
= (cb
->tail
+ c
) & (TI_WRITE_BUF_SIZE
-1);