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>.
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/circ_buf.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
39 #include "ti_usb_3410_5052.h"
43 #define TI_DRIVER_VERSION "v0.9"
44 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
47 #define TI_FIRMWARE_BUF_SIZE 16284
49 #define TI_WRITE_BUF_SIZE 1024
51 #define TI_TRANSFER_TIMEOUT 2
53 #define TI_DEFAULT_LOW_LATENCY 0
54 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
56 /* supported setserial flags */
57 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
60 #define TI_READ_URB_RUNNING 0
61 #define TI_READ_URB_STOPPING 1
62 #define TI_READ_URB_STOPPED 2
64 #define TI_EXTRA_VID_PID_COUNT 5
74 __u8 tp_uart_mode
; /* 232 or 485 modes */
75 unsigned int tp_uart_base_addr
;
77 int tp_closing_wait
;/* in .01 secs */
78 struct async_icount tp_icount
;
79 wait_queue_head_t tp_msr_wait
; /* wait for msr change */
80 wait_queue_head_t tp_write_wait
;
81 struct ti_device
*tp_tdev
;
82 struct usb_serial_port
*tp_port
;
84 int tp_read_urb_state
;
85 int tp_write_urb_in_use
;
86 struct circ_buf
*tp_write_buf
;
90 struct mutex td_open_close_lock
;
91 int td_open_port_count
;
92 struct usb_serial
*td_serial
;
98 /* Function Declarations */
100 static int ti_startup(struct usb_serial
*serial
);
101 static void ti_shutdown(struct usb_serial
*serial
);
102 static int ti_open(struct tty_struct
*tty
, struct usb_serial_port
*port
,
104 static void ti_close(struct tty_struct
*tty
, struct usb_serial_port
*port
,
106 static int ti_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
107 const unsigned char *data
, int count
);
108 static int ti_write_room(struct tty_struct
*tty
);
109 static int ti_chars_in_buffer(struct tty_struct
*tty
);
110 static void ti_throttle(struct tty_struct
*tty
);
111 static void ti_unthrottle(struct tty_struct
*tty
);
112 static int ti_ioctl(struct tty_struct
*tty
, struct file
*file
,
113 unsigned int cmd
, unsigned long arg
);
114 static void ti_set_termios(struct tty_struct
*tty
,
115 struct usb_serial_port
*port
, struct ktermios
*old_termios
);
116 static int ti_tiocmget(struct tty_struct
*tty
, struct file
*file
);
117 static int ti_tiocmset(struct tty_struct
*tty
, struct file
*file
,
118 unsigned int set
, unsigned int clear
);
119 static void ti_break(struct tty_struct
*tty
, int break_state
);
120 static void ti_interrupt_callback(struct urb
*urb
);
121 static void ti_bulk_in_callback(struct urb
*urb
);
122 static void ti_bulk_out_callback(struct urb
*urb
);
124 static void ti_recv(struct device
*dev
, struct tty_struct
*tty
,
125 unsigned char *data
, int length
);
126 static void ti_send(struct ti_port
*tport
);
127 static int ti_set_mcr(struct ti_port
*tport
, unsigned int mcr
);
128 static int ti_get_lsr(struct ti_port
*tport
);
129 static int ti_get_serial_info(struct ti_port
*tport
,
130 struct serial_struct __user
*ret_arg
);
131 static int ti_set_serial_info(struct tty_struct
*tty
, struct ti_port
*tport
,
132 struct serial_struct __user
*new_arg
);
133 static void ti_handle_new_msr(struct ti_port
*tport
, __u8 msr
);
135 static void ti_drain(struct ti_port
*tport
, unsigned long timeout
, int flush
);
137 static void ti_stop_read(struct ti_port
*tport
, struct tty_struct
*tty
);
138 static int ti_restart_read(struct ti_port
*tport
, struct tty_struct
*tty
);
140 static int ti_command_out_sync(struct ti_device
*tdev
, __u8 command
,
141 __u16 moduleid
, __u16 value
, __u8
*data
, int size
);
142 static int ti_command_in_sync(struct ti_device
*tdev
, __u8 command
,
143 __u16 moduleid
, __u16 value
, __u8
*data
, int size
);
145 static int ti_write_byte(struct ti_device
*tdev
, unsigned long addr
,
146 __u8 mask
, __u8 byte
);
148 static int ti_download_firmware(struct ti_device
*tdev
, int type
);
150 /* circular buffer */
151 static struct circ_buf
*ti_buf_alloc(void);
152 static void ti_buf_free(struct circ_buf
*cb
);
153 static void ti_buf_clear(struct circ_buf
*cb
);
154 static int ti_buf_data_avail(struct circ_buf
*cb
);
155 static int ti_buf_space_avail(struct circ_buf
*cb
);
156 static int ti_buf_put(struct circ_buf
*cb
, const char *buf
, int count
);
157 static int ti_buf_get(struct circ_buf
*cb
, char *buf
, int count
);
162 /* module parameters */
164 static int low_latency
= TI_DEFAULT_LOW_LATENCY
;
165 static int closing_wait
= TI_DEFAULT_CLOSING_WAIT
;
166 static ushort vendor_3410
[TI_EXTRA_VID_PID_COUNT
];
167 static unsigned int vendor_3410_count
;
168 static ushort product_3410
[TI_EXTRA_VID_PID_COUNT
];
169 static unsigned int product_3410_count
;
170 static ushort vendor_5052
[TI_EXTRA_VID_PID_COUNT
];
171 static unsigned int vendor_5052_count
;
172 static ushort product_5052
[TI_EXTRA_VID_PID_COUNT
];
173 static unsigned int product_5052_count
;
175 /* supported devices */
176 /* the array dimension is the number of default entries plus */
177 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
179 static struct usb_device_id ti_id_table_3410
[1+TI_EXTRA_VID_PID_COUNT
+1] = {
180 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_PRODUCT_ID
) },
181 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_EZ430_ID
) },
184 static struct usb_device_id ti_id_table_5052
[4+TI_EXTRA_VID_PID_COUNT
+1] = {
185 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_BOOT_PRODUCT_ID
) },
186 { USB_DEVICE(TI_VENDOR_ID
, TI_5152_BOOT_PRODUCT_ID
) },
187 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_EEPROM_PRODUCT_ID
) },
188 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_FIRMWARE_PRODUCT_ID
) },
191 static struct usb_device_id ti_id_table_combined
[] = {
192 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_PRODUCT_ID
) },
193 { USB_DEVICE(TI_VENDOR_ID
, TI_3410_EZ430_ID
) },
194 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_BOOT_PRODUCT_ID
) },
195 { USB_DEVICE(TI_VENDOR_ID
, TI_5152_BOOT_PRODUCT_ID
) },
196 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_EEPROM_PRODUCT_ID
) },
197 { USB_DEVICE(TI_VENDOR_ID
, TI_5052_FIRMWARE_PRODUCT_ID
) },
201 static struct usb_driver ti_usb_driver
= {
202 .name
= "ti_usb_3410_5052",
203 .probe
= usb_serial_probe
,
204 .disconnect
= usb_serial_disconnect
,
205 .id_table
= ti_id_table_combined
,
209 static struct usb_serial_driver ti_1port_device
= {
211 .owner
= THIS_MODULE
,
212 .name
= "ti_usb_3410_5052_1",
214 .description
= "TI USB 3410 1 port adapter",
215 .usb_driver
= &ti_usb_driver
,
216 .id_table
= ti_id_table_3410
,
218 .attach
= ti_startup
,
219 .shutdown
= ti_shutdown
,
223 .write_room
= ti_write_room
,
224 .chars_in_buffer
= ti_chars_in_buffer
,
225 .throttle
= ti_throttle
,
226 .unthrottle
= ti_unthrottle
,
228 .set_termios
= ti_set_termios
,
229 .tiocmget
= ti_tiocmget
,
230 .tiocmset
= ti_tiocmset
,
231 .break_ctl
= ti_break
,
232 .read_int_callback
= ti_interrupt_callback
,
233 .read_bulk_callback
= ti_bulk_in_callback
,
234 .write_bulk_callback
= ti_bulk_out_callback
,
237 static struct usb_serial_driver ti_2port_device
= {
239 .owner
= THIS_MODULE
,
240 .name
= "ti_usb_3410_5052_2",
242 .description
= "TI USB 5052 2 port adapter",
243 .usb_driver
= &ti_usb_driver
,
244 .id_table
= ti_id_table_5052
,
246 .attach
= ti_startup
,
247 .shutdown
= ti_shutdown
,
251 .write_room
= ti_write_room
,
252 .chars_in_buffer
= ti_chars_in_buffer
,
253 .throttle
= ti_throttle
,
254 .unthrottle
= ti_unthrottle
,
256 .set_termios
= ti_set_termios
,
257 .tiocmget
= ti_tiocmget
,
258 .tiocmset
= ti_tiocmset
,
259 .break_ctl
= ti_break
,
260 .read_int_callback
= ti_interrupt_callback
,
261 .read_bulk_callback
= ti_bulk_in_callback
,
262 .write_bulk_callback
= ti_bulk_out_callback
,
268 MODULE_AUTHOR(TI_DRIVER_AUTHOR
);
269 MODULE_DESCRIPTION(TI_DRIVER_DESC
);
270 MODULE_VERSION(TI_DRIVER_VERSION
);
271 MODULE_LICENSE("GPL");
273 MODULE_FIRMWARE("ti_3410.fw");
274 MODULE_FIRMWARE("ti_5052.fw");
276 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
277 MODULE_PARM_DESC(debug
, "Enable debugging, 0=no, 1=yes");
279 module_param(low_latency
, bool, S_IRUGO
| S_IWUSR
);
280 MODULE_PARM_DESC(low_latency
,
281 "TTY low_latency flag, 0=off, 1=on, default is off");
283 module_param(closing_wait
, int, S_IRUGO
| S_IWUSR
);
284 MODULE_PARM_DESC(closing_wait
,
285 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
287 module_param_array(vendor_3410
, ushort
, &vendor_3410_count
, S_IRUGO
);
288 MODULE_PARM_DESC(vendor_3410
,
289 "Vendor ids for 3410 based devices, 1-5 short integers");
290 module_param_array(product_3410
, ushort
, &product_3410_count
, S_IRUGO
);
291 MODULE_PARM_DESC(product_3410
,
292 "Product ids for 3410 based devices, 1-5 short integers");
293 module_param_array(vendor_5052
, ushort
, &vendor_5052_count
, S_IRUGO
);
294 MODULE_PARM_DESC(vendor_5052
,
295 "Vendor ids for 5052 based devices, 1-5 short integers");
296 module_param_array(product_5052
, ushort
, &product_5052_count
, S_IRUGO
);
297 MODULE_PARM_DESC(product_5052
,
298 "Product ids for 5052 based devices, 1-5 short integers");
300 MODULE_DEVICE_TABLE(usb
, ti_id_table_combined
);
305 static int __init
ti_init(void)
310 /* insert extra vendor and product ids */
311 j
= ARRAY_SIZE(ti_id_table_3410
) - TI_EXTRA_VID_PID_COUNT
- 1;
312 for (i
= 0; i
< min(vendor_3410_count
, product_3410_count
); i
++, j
++) {
313 ti_id_table_3410
[j
].idVendor
= vendor_3410
[i
];
314 ti_id_table_3410
[j
].idProduct
= product_3410
[i
];
315 ti_id_table_3410
[j
].match_flags
= USB_DEVICE_ID_MATCH_DEVICE
;
317 j
= ARRAY_SIZE(ti_id_table_5052
) - TI_EXTRA_VID_PID_COUNT
- 1;
318 for (i
= 0; i
< min(vendor_5052_count
, product_5052_count
); i
++, j
++) {
319 ti_id_table_5052
[j
].idVendor
= vendor_5052
[i
];
320 ti_id_table_5052
[j
].idProduct
= product_5052
[i
];
321 ti_id_table_5052
[j
].match_flags
= USB_DEVICE_ID_MATCH_DEVICE
;
324 ret
= usb_serial_register(&ti_1port_device
);
327 ret
= usb_serial_register(&ti_2port_device
);
331 ret
= usb_register(&ti_usb_driver
);
335 printk(KERN_INFO KBUILD_MODNAME
": " TI_DRIVER_VERSION
":"
336 TI_DRIVER_DESC
"\n");
341 usb_serial_deregister(&ti_2port_device
);
343 usb_serial_deregister(&ti_1port_device
);
349 static void __exit
ti_exit(void)
351 usb_serial_deregister(&ti_1port_device
);
352 usb_serial_deregister(&ti_2port_device
);
353 usb_deregister(&ti_usb_driver
);
357 module_init(ti_init
);
358 module_exit(ti_exit
);
361 static int ti_startup(struct usb_serial
*serial
)
363 struct ti_device
*tdev
;
364 struct ti_port
*tport
;
365 struct usb_device
*dev
= serial
->dev
;
370 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
371 __func__
, le16_to_cpu(dev
->descriptor
.idProduct
),
372 dev
->descriptor
.bNumConfigurations
,
373 dev
->actconfig
->desc
.bConfigurationValue
);
375 /* create device structure */
376 tdev
= kzalloc(sizeof(struct ti_device
), GFP_KERNEL
);
378 dev_err(&dev
->dev
, "%s - out of memory\n", __func__
);
381 mutex_init(&tdev
->td_open_close_lock
);
382 tdev
->td_serial
= serial
;
383 usb_set_serial_data(serial
, tdev
);
385 /* determine device type */
386 if (usb_match_id(serial
->interface
, ti_id_table_3410
))
387 tdev
->td_is_3410
= 1;
388 dbg("%s - device type is %s", __func__
,
389 tdev
->td_is_3410
? "3410" : "5052");
391 /* if we have only 1 configuration, download firmware */
392 if (dev
->descriptor
.bNumConfigurations
== 1) {
393 if (tdev
->td_is_3410
)
394 status
= ti_download_firmware(tdev
, 3410);
396 status
= ti_download_firmware(tdev
, 5052);
400 /* 3410 must be reset, 5052 resets itself */
401 if (tdev
->td_is_3410
) {
402 msleep_interruptible(100);
403 usb_reset_device(dev
);
410 /* the second configuration must be set */
411 if (dev
->actconfig
->desc
.bConfigurationValue
== TI_BOOT_CONFIG
) {
412 status
= usb_driver_set_configuration(dev
, TI_ACTIVE_CONFIG
);
413 status
= status
? status
: -ENODEV
;
417 /* set up port structures */
418 for (i
= 0; i
< serial
->num_ports
; ++i
) {
419 tport
= kzalloc(sizeof(struct ti_port
), GFP_KERNEL
);
421 dev_err(&dev
->dev
, "%s - out of memory\n", __func__
);
425 spin_lock_init(&tport
->tp_lock
);
426 tport
->tp_uart_base_addr
= (i
== 0 ?
427 TI_UART1_BASE_ADDR
: TI_UART2_BASE_ADDR
);
428 tport
->tp_flags
= low_latency
? ASYNC_LOW_LATENCY
: 0;
429 tport
->tp_closing_wait
= closing_wait
;
430 init_waitqueue_head(&tport
->tp_msr_wait
);
431 init_waitqueue_head(&tport
->tp_write_wait
);
432 tport
->tp_write_buf
= ti_buf_alloc();
433 if (tport
->tp_write_buf
== NULL
) {
434 dev_err(&dev
->dev
, "%s - out of memory\n", __func__
);
439 tport
->tp_port
= serial
->port
[i
];
440 tport
->tp_tdev
= tdev
;
441 usb_set_serial_port_data(serial
->port
[i
], tport
);
442 tport
->tp_uart_mode
= 0; /* default is RS232 */
448 for (--i
; i
>= 0; --i
) {
449 tport
= usb_get_serial_port_data(serial
->port
[i
]);
450 ti_buf_free(tport
->tp_write_buf
);
452 usb_set_serial_port_data(serial
->port
[i
], NULL
);
456 usb_set_serial_data(serial
, NULL
);
461 static void ti_shutdown(struct usb_serial
*serial
)
464 struct ti_device
*tdev
= usb_get_serial_data(serial
);
465 struct ti_port
*tport
;
469 for (i
= 0; i
< serial
->num_ports
; ++i
) {
470 tport
= usb_get_serial_port_data(serial
->port
[i
]);
472 ti_buf_free(tport
->tp_write_buf
);
474 usb_set_serial_port_data(serial
->port
[i
], NULL
);
479 usb_set_serial_data(serial
, NULL
);
483 static int ti_open(struct tty_struct
*tty
,
484 struct usb_serial_port
*port
, struct file
*file
)
486 struct ti_port
*tport
= usb_get_serial_port_data(port
);
487 struct ti_device
*tdev
;
488 struct usb_device
*dev
;
492 __u16 open_settings
= (__u8
)(TI_PIPE_MODE_CONTINOUS
|
493 TI_PIPE_TIMEOUT_ENABLE
|
494 (TI_TRANSFER_TIMEOUT
<< 2));
496 dbg("%s - port %d", __func__
, port
->number
);
501 dev
= port
->serial
->dev
;
502 tdev
= tport
->tp_tdev
;
504 /* only one open on any port on a device at a time */
505 if (mutex_lock_interruptible(&tdev
->td_open_close_lock
))
510 (tport
->tp_flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
512 port_number
= port
->number
- port
->serial
->minor
;
514 memset(&(tport
->tp_icount
), 0x00, sizeof(tport
->tp_icount
));
517 tport
->tp_shadow_mcr
|= (TI_MCR_RTS
| TI_MCR_DTR
);
519 /* start interrupt urb the first time a port is opened on this device */
520 if (tdev
->td_open_port_count
== 0) {
521 dbg("%s - start interrupt in urb", __func__
);
522 urb
= tdev
->td_serial
->port
[0]->interrupt_in_urb
;
524 dev_err(&port
->dev
, "%s - no interrupt urb\n",
529 urb
->complete
= ti_interrupt_callback
;
532 status
= usb_submit_urb(urb
, GFP_KERNEL
);
535 "%s - submit interrupt urb failed, %d\n",
542 ti_set_termios(tty
, port
, tty
->termios
);
544 dbg("%s - sending TI_OPEN_PORT", __func__
);
545 status
= ti_command_out_sync(tdev
, TI_OPEN_PORT
,
546 (__u8
)(TI_UART1_PORT
+ port_number
), open_settings
, NULL
, 0);
548 dev_err(&port
->dev
, "%s - cannot send open command, %d\n",
553 dbg("%s - sending TI_START_PORT", __func__
);
554 status
= ti_command_out_sync(tdev
, TI_START_PORT
,
555 (__u8
)(TI_UART1_PORT
+ port_number
), 0, NULL
, 0);
557 dev_err(&port
->dev
, "%s - cannot send start command, %d\n",
562 dbg("%s - sending TI_PURGE_PORT", __func__
);
563 status
= ti_command_out_sync(tdev
, TI_PURGE_PORT
,
564 (__u8
)(TI_UART1_PORT
+ port_number
), TI_PURGE_INPUT
, NULL
, 0);
566 dev_err(&port
->dev
, "%s - cannot clear input buffers, %d\n",
570 status
= ti_command_out_sync(tdev
, TI_PURGE_PORT
,
571 (__u8
)(TI_UART1_PORT
+ port_number
), TI_PURGE_OUTPUT
, NULL
, 0);
573 dev_err(&port
->dev
, "%s - cannot clear output buffers, %d\n",
578 /* reset the data toggle on the bulk endpoints to work around bug in
579 * host controllers where things get out of sync some times */
580 usb_clear_halt(dev
, port
->write_urb
->pipe
);
581 usb_clear_halt(dev
, port
->read_urb
->pipe
);
584 ti_set_termios(tty
, port
, tty
->termios
);
586 dbg("%s - sending TI_OPEN_PORT (2)", __func__
);
587 status
= ti_command_out_sync(tdev
, TI_OPEN_PORT
,
588 (__u8
)(TI_UART1_PORT
+ port_number
), open_settings
, NULL
, 0);
590 dev_err(&port
->dev
, "%s - cannot send open command (2), %d\n",
595 dbg("%s - sending TI_START_PORT (2)", __func__
);
596 status
= ti_command_out_sync(tdev
, TI_START_PORT
,
597 (__u8
)(TI_UART1_PORT
+ port_number
), 0, NULL
, 0);
599 dev_err(&port
->dev
, "%s - cannot send start command (2), %d\n",
605 dbg("%s - start read urb", __func__
);
606 urb
= port
->read_urb
;
608 dev_err(&port
->dev
, "%s - no read urb\n", __func__
);
612 tport
->tp_read_urb_state
= TI_READ_URB_RUNNING
;
613 urb
->complete
= ti_bulk_in_callback
;
614 urb
->context
= tport
;
616 status
= usb_submit_urb(urb
, GFP_KERNEL
);
618 dev_err(&port
->dev
, "%s - submit read urb failed, %d\n",
623 tport
->tp_is_open
= 1;
624 ++tdev
->td_open_port_count
;
629 if (tdev
->td_open_port_count
== 0)
630 usb_kill_urb(port
->serial
->port
[0]->interrupt_in_urb
);
632 mutex_unlock(&tdev
->td_open_close_lock
);
633 dbg("%s - exit %d", __func__
, status
);
638 static void ti_close(struct tty_struct
*tty
, struct usb_serial_port
*port
,
641 struct ti_device
*tdev
;
642 struct ti_port
*tport
;
647 dbg("%s - port %d", __func__
, port
->number
);
649 tdev
= usb_get_serial_data(port
->serial
);
650 tport
= usb_get_serial_port_data(port
);
651 if (tdev
== NULL
|| tport
== NULL
)
654 tport
->tp_is_open
= 0;
656 ti_drain(tport
, (tport
->tp_closing_wait
*HZ
)/100, 1);
658 usb_kill_urb(port
->read_urb
);
659 usb_kill_urb(port
->write_urb
);
660 tport
->tp_write_urb_in_use
= 0;
662 port_number
= port
->number
- port
->serial
->minor
;
664 dbg("%s - sending TI_CLOSE_PORT", __func__
);
665 status
= ti_command_out_sync(tdev
, TI_CLOSE_PORT
,
666 (__u8
)(TI_UART1_PORT
+ port_number
), 0, NULL
, 0);
669 "%s - cannot send close port command, %d\n"
672 /* if mutex_lock is interrupted, continue anyway */
673 do_unlock
= !mutex_lock_interruptible(&tdev
->td_open_close_lock
);
674 --tport
->tp_tdev
->td_open_port_count
;
675 if (tport
->tp_tdev
->td_open_port_count
<= 0) {
676 /* last port is closed, shut down interrupt urb */
677 usb_kill_urb(port
->serial
->port
[0]->interrupt_in_urb
);
678 tport
->tp_tdev
->td_open_port_count
= 0;
681 mutex_unlock(&tdev
->td_open_close_lock
);
683 dbg("%s - exit", __func__
);
687 static int ti_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
688 const unsigned char *data
, int count
)
690 struct ti_port
*tport
= usb_get_serial_port_data(port
);
693 dbg("%s - port %d", __func__
, port
->number
);
696 dbg("%s - write request of 0 bytes", __func__
);
700 if (tport
== NULL
|| !tport
->tp_is_open
)
703 spin_lock_irqsave(&tport
->tp_lock
, flags
);
704 count
= ti_buf_put(tport
->tp_write_buf
, data
, count
);
705 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
713 static int ti_write_room(struct tty_struct
*tty
)
715 struct usb_serial_port
*port
= tty
->driver_data
;
716 struct ti_port
*tport
= usb_get_serial_port_data(port
);
720 dbg("%s - port %d", __func__
, port
->number
);
725 spin_lock_irqsave(&tport
->tp_lock
, flags
);
726 room
= ti_buf_space_avail(tport
->tp_write_buf
);
727 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
729 dbg("%s - returns %d", __func__
, room
);
734 static int ti_chars_in_buffer(struct tty_struct
*tty
)
736 struct usb_serial_port
*port
= tty
->driver_data
;
737 struct ti_port
*tport
= usb_get_serial_port_data(port
);
741 dbg("%s - port %d", __func__
, port
->number
);
746 spin_lock_irqsave(&tport
->tp_lock
, flags
);
747 chars
= ti_buf_data_avail(tport
->tp_write_buf
);
748 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
750 dbg("%s - returns %d", __func__
, chars
);
755 static void ti_throttle(struct tty_struct
*tty
)
757 struct usb_serial_port
*port
= tty
->driver_data
;
758 struct ti_port
*tport
= usb_get_serial_port_data(port
);
760 dbg("%s - port %d", __func__
, port
->number
);
765 if (I_IXOFF(tty
) || C_CRTSCTS(tty
))
766 ti_stop_read(tport
, tty
);
771 static void ti_unthrottle(struct tty_struct
*tty
)
773 struct usb_serial_port
*port
= tty
->driver_data
;
774 struct ti_port
*tport
= usb_get_serial_port_data(port
);
777 dbg("%s - port %d", __func__
, port
->number
);
782 if (I_IXOFF(tty
) || C_CRTSCTS(tty
)) {
783 status
= ti_restart_read(tport
, tty
);
785 dev_err(&port
->dev
, "%s - cannot restart read, %d\n",
791 static int ti_ioctl(struct tty_struct
*tty
, struct file
*file
,
792 unsigned int cmd
, unsigned long arg
)
794 struct usb_serial_port
*port
= tty
->driver_data
;
795 struct ti_port
*tport
= usb_get_serial_port_data(port
);
796 struct async_icount cnow
;
797 struct async_icount cprev
;
799 dbg("%s - port %d, cmd = 0x%04X", __func__
, port
->number
, cmd
);
806 dbg("%s - (%d) TIOCGSERIAL", __func__
, port
->number
);
807 return ti_get_serial_info(tport
,
808 (struct serial_struct __user
*)arg
);
810 dbg("%s - (%d) TIOCSSERIAL", __func__
, port
->number
);
811 return ti_set_serial_info(tty
, tport
,
812 (struct serial_struct __user
*)arg
);
814 dbg("%s - (%d) TIOCMIWAIT", __func__
, port
->number
);
815 cprev
= tport
->tp_icount
;
817 interruptible_sleep_on(&tport
->tp_msr_wait
);
818 if (signal_pending(current
))
820 cnow
= tport
->tp_icount
;
821 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
822 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
823 return -EIO
; /* no change => error */
824 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
825 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
826 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
827 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
)))
833 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
834 __func__
, port
->number
,
835 tport
->tp_icount
.rx
, tport
->tp_icount
.tx
);
836 if (copy_to_user((void __user
*)arg
, &tport
->tp_icount
,
837 sizeof(tport
->tp_icount
)))
845 static void ti_set_termios(struct tty_struct
*tty
,
846 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
848 struct ti_port
*tport
= usb_get_serial_port_data(port
);
849 struct ti_uart_config
*config
;
850 tcflag_t cflag
, iflag
;
853 int port_number
= port
->number
- port
->serial
->minor
;
856 dbg("%s - port %d", __func__
, port
->number
);
858 cflag
= tty
->termios
->c_cflag
;
859 iflag
= tty
->termios
->c_iflag
;
861 dbg("%s - cflag %08x, iflag %08x", __func__
, cflag
, iflag
);
862 dbg("%s - old clfag %08x, old iflag %08x", __func__
,
863 old_termios
->c_cflag
, old_termios
->c_iflag
);
868 config
= kmalloc(sizeof(*config
), GFP_KERNEL
);
870 dev_err(&port
->dev
, "%s - out of memory\n", __func__
);
876 /* these flags must be set */
877 config
->wFlags
|= TI_UART_ENABLE_MS_INTS
;
878 config
->wFlags
|= TI_UART_ENABLE_AUTO_START_DMA
;
879 config
->bUartMode
= (__u8
)(tport
->tp_uart_mode
);
881 switch (cflag
& CSIZE
) {
883 config
->bDataBits
= TI_UART_5_DATA_BITS
;
886 config
->bDataBits
= TI_UART_6_DATA_BITS
;
889 config
->bDataBits
= TI_UART_7_DATA_BITS
;
893 config
->bDataBits
= TI_UART_8_DATA_BITS
;
897 /* CMSPAR isn't supported by this driver */
898 tty
->termios
->c_cflag
&= ~CMSPAR
;
900 if (cflag
& PARENB
) {
901 if (cflag
& PARODD
) {
902 config
->wFlags
|= TI_UART_ENABLE_PARITY_CHECKING
;
903 config
->bParity
= TI_UART_ODD_PARITY
;
905 config
->wFlags
|= TI_UART_ENABLE_PARITY_CHECKING
;
906 config
->bParity
= TI_UART_EVEN_PARITY
;
909 config
->wFlags
&= ~TI_UART_ENABLE_PARITY_CHECKING
;
910 config
->bParity
= TI_UART_NO_PARITY
;
914 config
->bStopBits
= TI_UART_2_STOP_BITS
;
916 config
->bStopBits
= TI_UART_1_STOP_BITS
;
918 if (cflag
& CRTSCTS
) {
919 /* RTS flow control must be off to drop RTS for baud rate B0 */
920 if ((cflag
& CBAUD
) != B0
)
921 config
->wFlags
|= TI_UART_ENABLE_RTS_IN
;
922 config
->wFlags
|= TI_UART_ENABLE_CTS_OUT
;
925 ti_restart_read(tport
, tty
);
928 if (I_IXOFF(tty
) || I_IXON(tty
)) {
929 config
->cXon
= START_CHAR(tty
);
930 config
->cXoff
= STOP_CHAR(tty
);
933 config
->wFlags
|= TI_UART_ENABLE_X_IN
;
935 ti_restart_read(tport
, tty
);
938 config
->wFlags
|= TI_UART_ENABLE_X_OUT
;
941 baud
= tty_get_baud_rate(tty
);
944 if (tport
->tp_tdev
->td_is_3410
)
945 config
->wBaudRate
= (__u16
)((923077 + baud
/2) / baud
);
947 config
->wBaudRate
= (__u16
)((461538 + baud
/2) / baud
);
949 /* FIXME: Should calculate resulting baud here and report it back */
950 if ((cflag
& CBAUD
) != B0
)
951 tty_encode_baud_rate(tty
, baud
, baud
);
953 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
954 __func__
, baud
, config
->wBaudRate
, config
->wFlags
, config
->bDataBits
, config
->bParity
, config
->bStopBits
, config
->cXon
, config
->cXoff
, config
->bUartMode
);
956 cpu_to_be16s(&config
->wBaudRate
);
957 cpu_to_be16s(&config
->wFlags
);
959 status
= ti_command_out_sync(tport
->tp_tdev
, TI_SET_CONFIG
,
960 (__u8
)(TI_UART1_PORT
+ port_number
), 0, (__u8
*)config
,
963 dev_err(&port
->dev
, "%s - cannot set config on port %d, %d\n",
964 __func__
, port_number
, status
);
966 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
967 mcr
= tport
->tp_shadow_mcr
;
968 /* if baud rate is B0, clear RTS and DTR */
969 if ((cflag
& CBAUD
) == B0
)
970 mcr
&= ~(TI_MCR_DTR
| TI_MCR_RTS
);
971 status
= ti_set_mcr(tport
, mcr
);
974 "%s - cannot set modem control on port %d, %d\n",
975 __func__
, port_number
, status
);
981 static int ti_tiocmget(struct tty_struct
*tty
, struct file
*file
)
983 struct usb_serial_port
*port
= tty
->driver_data
;
984 struct ti_port
*tport
= usb_get_serial_port_data(port
);
990 dbg("%s - port %d", __func__
, port
->number
);
995 spin_lock_irqsave(&tport
->tp_lock
, flags
);
997 mcr
= tport
->tp_shadow_mcr
;
998 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1000 result
= ((mcr
& TI_MCR_DTR
) ? TIOCM_DTR
: 0)
1001 | ((mcr
& TI_MCR_RTS
) ? TIOCM_RTS
: 0)
1002 | ((mcr
& TI_MCR_LOOP
) ? TIOCM_LOOP
: 0)
1003 | ((msr
& TI_MSR_CTS
) ? TIOCM_CTS
: 0)
1004 | ((msr
& TI_MSR_CD
) ? TIOCM_CAR
: 0)
1005 | ((msr
& TI_MSR_RI
) ? TIOCM_RI
: 0)
1006 | ((msr
& TI_MSR_DSR
) ? TIOCM_DSR
: 0);
1008 dbg("%s - 0x%04X", __func__
, result
);
1014 static int ti_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1015 unsigned int set
, unsigned int clear
)
1017 struct usb_serial_port
*port
= tty
->driver_data
;
1018 struct ti_port
*tport
= usb_get_serial_port_data(port
);
1020 unsigned long flags
;
1022 dbg("%s - port %d", __func__
, port
->number
);
1027 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1028 mcr
= tport
->tp_shadow_mcr
;
1030 if (set
& TIOCM_RTS
)
1032 if (set
& TIOCM_DTR
)
1034 if (set
& TIOCM_LOOP
)
1037 if (clear
& TIOCM_RTS
)
1039 if (clear
& TIOCM_DTR
)
1041 if (clear
& TIOCM_LOOP
)
1042 mcr
&= ~TI_MCR_LOOP
;
1043 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1045 return ti_set_mcr(tport
, mcr
);
1049 static void ti_break(struct tty_struct
*tty
, int break_state
)
1051 struct usb_serial_port
*port
= tty
->driver_data
;
1052 struct ti_port
*tport
= usb_get_serial_port_data(port
);
1055 dbg("%s - state = %d", __func__
, break_state
);
1060 ti_drain(tport
, (tport
->tp_closing_wait
*HZ
)/100, 0);
1062 status
= ti_write_byte(tport
->tp_tdev
,
1063 tport
->tp_uart_base_addr
+ TI_UART_OFFSET_LCR
,
1064 TI_LCR_BREAK
, break_state
== -1 ? TI_LCR_BREAK
: 0);
1067 dbg("%s - error setting break, %d", __func__
, status
);
1071 static void ti_interrupt_callback(struct urb
*urb
)
1073 struct ti_device
*tdev
= urb
->context
;
1074 struct usb_serial_port
*port
;
1075 struct usb_serial
*serial
= tdev
->td_serial
;
1076 struct ti_port
*tport
;
1077 struct device
*dev
= &urb
->dev
->dev
;
1078 unsigned char *data
= urb
->transfer_buffer
;
1079 int length
= urb
->actual_length
;
1082 int status
= urb
->status
;
1086 dbg("%s", __func__
);
1094 dbg("%s - urb shutting down, %d", __func__
, status
);
1095 tdev
->td_urb_error
= 1;
1098 dev_err(dev
, "%s - nonzero urb status, %d\n",
1100 tdev
->td_urb_error
= 1;
1105 dbg("%s - bad packet size, %d", __func__
, length
);
1109 if (data
[0] == TI_CODE_HARDWARE_ERROR
) {
1110 dev_err(dev
, "%s - hardware error, %d\n", __func__
, data
[1]);
1114 port_number
= TI_GET_PORT_FROM_CODE(data
[0]);
1115 function
= TI_GET_FUNC_FROM_CODE(data
[0]);
1117 dbg("%s - port_number %d, function %d, data 0x%02X",
1118 __func__
, port_number
, function
, data
[1]);
1120 if (port_number
>= serial
->num_ports
) {
1121 dev_err(dev
, "%s - bad port number, %d\n",
1122 __func__
, port_number
);
1126 port
= serial
->port
[port_number
];
1128 tport
= usb_get_serial_port_data(port
);
1133 case TI_CODE_DATA_ERROR
:
1134 dev_err(dev
, "%s - DATA ERROR, port %d, data 0x%02X\n",
1135 __func__
, port_number
, data
[1]);
1138 case TI_CODE_MODEM_STATUS
:
1140 dbg("%s - port %d, msr 0x%02X", __func__
, port_number
, msr
);
1141 ti_handle_new_msr(tport
, msr
);
1145 dev_err(dev
, "%s - unknown interrupt code, 0x%02X\n",
1151 retval
= usb_submit_urb(urb
, GFP_ATOMIC
);
1153 dev_err(dev
, "%s - resubmit interrupt urb failed, %d\n",
1158 static void ti_bulk_in_callback(struct urb
*urb
)
1160 struct ti_port
*tport
= urb
->context
;
1161 struct usb_serial_port
*port
= tport
->tp_port
;
1162 struct device
*dev
= &urb
->dev
->dev
;
1163 int status
= urb
->status
;
1165 struct tty_struct
*tty
;
1167 dbg("%s", __func__
);
1175 dbg("%s - urb shutting down, %d", __func__
, status
);
1176 tport
->tp_tdev
->td_urb_error
= 1;
1177 wake_up_interruptible(&tport
->tp_write_wait
);
1180 dev_err(dev
, "%s - nonzero urb status, %d\n",
1182 tport
->tp_tdev
->td_urb_error
= 1;
1183 wake_up_interruptible(&tport
->tp_write_wait
);
1186 if (status
== -EPIPE
)
1190 dev_err(dev
, "%s - stopping read!\n", __func__
);
1194 tty
= tty_port_tty_get(&port
->port
);
1195 if (tty
&& urb
->actual_length
) {
1196 usb_serial_debug_data(debug
, dev
, __func__
,
1197 urb
->actual_length
, urb
->transfer_buffer
);
1199 if (!tport
->tp_is_open
)
1200 dbg("%s - port closed, dropping data", __func__
);
1202 ti_recv(&urb
->dev
->dev
, tty
,
1203 urb
->transfer_buffer
,
1204 urb
->actual_length
);
1206 spin_lock(&tport
->tp_lock
);
1207 tport
->tp_icount
.rx
+= urb
->actual_length
;
1208 spin_unlock(&tport
->tp_lock
);
1213 /* continue to read unless stopping */
1214 spin_lock(&tport
->tp_lock
);
1215 if (tport
->tp_read_urb_state
== TI_READ_URB_RUNNING
) {
1216 urb
->dev
= port
->serial
->dev
;
1217 retval
= usb_submit_urb(urb
, GFP_ATOMIC
);
1218 } else if (tport
->tp_read_urb_state
== TI_READ_URB_STOPPING
) {
1219 tport
->tp_read_urb_state
= TI_READ_URB_STOPPED
;
1221 spin_unlock(&tport
->tp_lock
);
1223 dev_err(dev
, "%s - resubmit read urb failed, %d\n",
1228 static void ti_bulk_out_callback(struct urb
*urb
)
1230 struct ti_port
*tport
= urb
->context
;
1231 struct usb_serial_port
*port
= tport
->tp_port
;
1232 struct device
*dev
= &urb
->dev
->dev
;
1233 int status
= urb
->status
;
1235 dbg("%s - port %d", __func__
, port
->number
);
1237 tport
->tp_write_urb_in_use
= 0;
1245 dbg("%s - urb shutting down, %d", __func__
, status
);
1246 tport
->tp_tdev
->td_urb_error
= 1;
1247 wake_up_interruptible(&tport
->tp_write_wait
);
1250 dev_err(dev
, "%s - nonzero urb status, %d\n",
1252 tport
->tp_tdev
->td_urb_error
= 1;
1253 wake_up_interruptible(&tport
->tp_write_wait
);
1256 /* send any buffered data */
1261 static void ti_recv(struct device
*dev
, struct tty_struct
*tty
,
1262 unsigned char *data
, int length
)
1267 cnt
= tty_buffer_request_room(tty
, length
);
1269 dev_err(dev
, "%s - dropping data, %d bytes lost\n",
1270 __func__
, length
- cnt
);
1274 tty_insert_flip_string(tty
, data
, cnt
);
1275 tty_flip_buffer_push(tty
);
1278 } while (length
> 0);
1283 static void ti_send(struct ti_port
*tport
)
1286 struct usb_serial_port
*port
= tport
->tp_port
;
1287 struct tty_struct
*tty
= tty_port_tty_get(&port
->port
); /* FIXME */
1288 unsigned long flags
;
1291 dbg("%s - port %d", __func__
, port
->number
);
1293 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1295 if (tport
->tp_write_urb_in_use
)
1298 count
= ti_buf_get(tport
->tp_write_buf
,
1299 port
->write_urb
->transfer_buffer
,
1300 port
->bulk_out_size
);
1305 tport
->tp_write_urb_in_use
= 1;
1307 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1309 usb_serial_debug_data(debug
, &port
->dev
, __func__
, count
,
1310 port
->write_urb
->transfer_buffer
);
1312 usb_fill_bulk_urb(port
->write_urb
, port
->serial
->dev
,
1313 usb_sndbulkpipe(port
->serial
->dev
,
1314 port
->bulk_out_endpointAddress
),
1315 port
->write_urb
->transfer_buffer
, count
,
1316 ti_bulk_out_callback
, tport
);
1318 result
= usb_submit_urb(port
->write_urb
, GFP_ATOMIC
);
1320 dev_err(&port
->dev
, "%s - submit write urb failed, %d\n",
1322 tport
->tp_write_urb_in_use
= 0;
1323 /* TODO: reschedule ti_send */
1325 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1326 tport
->tp_icount
.tx
+= count
;
1327 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1330 /* more room in the buffer for new writes, wakeup */
1334 wake_up_interruptible(&tport
->tp_write_wait
);
1337 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1343 static int ti_set_mcr(struct ti_port
*tport
, unsigned int mcr
)
1345 unsigned long flags
;
1348 status
= ti_write_byte(tport
->tp_tdev
,
1349 tport
->tp_uart_base_addr
+ TI_UART_OFFSET_MCR
,
1350 TI_MCR_RTS
| TI_MCR_DTR
| TI_MCR_LOOP
, mcr
);
1352 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1354 tport
->tp_shadow_mcr
= mcr
;
1355 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1361 static int ti_get_lsr(struct ti_port
*tport
)
1364 struct ti_device
*tdev
= tport
->tp_tdev
;
1365 struct usb_serial_port
*port
= tport
->tp_port
;
1366 int port_number
= port
->number
- port
->serial
->minor
;
1367 struct ti_port_status
*data
;
1369 dbg("%s - port %d", __func__
, port
->number
);
1371 size
= sizeof(struct ti_port_status
);
1372 data
= kmalloc(size
, GFP_KERNEL
);
1374 dev_err(&port
->dev
, "%s - out of memory\n", __func__
);
1378 status
= ti_command_in_sync(tdev
, TI_GET_PORT_STATUS
,
1379 (__u8
)(TI_UART1_PORT
+port_number
), 0, (__u8
*)data
, size
);
1382 "%s - get port status command failed, %d\n",
1387 dbg("%s - lsr 0x%02X", __func__
, data
->bLSR
);
1389 tport
->tp_lsr
= data
->bLSR
;
1397 static int ti_get_serial_info(struct ti_port
*tport
,
1398 struct serial_struct __user
*ret_arg
)
1400 struct usb_serial_port
*port
= tport
->tp_port
;
1401 struct serial_struct ret_serial
;
1406 memset(&ret_serial
, 0, sizeof(ret_serial
));
1408 ret_serial
.type
= PORT_16550A
;
1409 ret_serial
.line
= port
->serial
->minor
;
1410 ret_serial
.port
= port
->number
- port
->serial
->minor
;
1411 ret_serial
.flags
= tport
->tp_flags
;
1412 ret_serial
.xmit_fifo_size
= TI_WRITE_BUF_SIZE
;
1413 ret_serial
.baud_base
= tport
->tp_tdev
->td_is_3410
? 921600 : 460800;
1414 ret_serial
.closing_wait
= tport
->tp_closing_wait
;
1416 if (copy_to_user(ret_arg
, &ret_serial
, sizeof(*ret_arg
)))
1423 static int ti_set_serial_info(struct tty_struct
*tty
, struct ti_port
*tport
,
1424 struct serial_struct __user
*new_arg
)
1426 struct serial_struct new_serial
;
1428 if (copy_from_user(&new_serial
, new_arg
, sizeof(new_serial
)))
1431 tport
->tp_flags
= new_serial
.flags
& TI_SET_SERIAL_FLAGS
;
1432 tty
->low_latency
= (tport
->tp_flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
1433 tport
->tp_closing_wait
= new_serial
.closing_wait
;
1439 static void ti_handle_new_msr(struct ti_port
*tport
, __u8 msr
)
1441 struct async_icount
*icount
;
1442 struct tty_struct
*tty
;
1443 unsigned long flags
;
1445 dbg("%s - msr 0x%02X", __func__
, msr
);
1447 if (msr
& TI_MSR_DELTA_MASK
) {
1448 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1449 icount
= &tport
->tp_icount
;
1450 if (msr
& TI_MSR_DELTA_CTS
)
1452 if (msr
& TI_MSR_DELTA_DSR
)
1454 if (msr
& TI_MSR_DELTA_CD
)
1456 if (msr
& TI_MSR_DELTA_RI
)
1458 wake_up_interruptible(&tport
->tp_msr_wait
);
1459 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1462 tport
->tp_msr
= msr
& TI_MSR_MASK
;
1464 /* handle CTS flow control */
1465 tty
= tty_port_tty_get(&tport
->tp_port
->port
);
1466 if (tty
&& C_CRTSCTS(tty
)) {
1467 if (msr
& TI_MSR_CTS
) {
1468 tty
->hw_stopped
= 0;
1471 tty
->hw_stopped
= 1;
1478 static void ti_drain(struct ti_port
*tport
, unsigned long timeout
, int flush
)
1480 struct ti_device
*tdev
= tport
->tp_tdev
;
1481 struct usb_serial_port
*port
= tport
->tp_port
;
1484 dbg("%s - port %d", __func__
, port
->number
);
1486 spin_lock_irq(&tport
->tp_lock
);
1488 /* wait for data to drain from the buffer */
1489 tdev
->td_urb_error
= 0;
1490 init_waitqueue_entry(&wait
, current
);
1491 add_wait_queue(&tport
->tp_write_wait
, &wait
);
1493 set_current_state(TASK_INTERRUPTIBLE
);
1494 if (ti_buf_data_avail(tport
->tp_write_buf
) == 0
1495 || timeout
== 0 || signal_pending(current
)
1496 || tdev
->td_urb_error
1497 || port
->serial
->disconnected
) /* disconnect */
1499 spin_unlock_irq(&tport
->tp_lock
);
1500 timeout
= schedule_timeout(timeout
);
1501 spin_lock_irq(&tport
->tp_lock
);
1503 set_current_state(TASK_RUNNING
);
1504 remove_wait_queue(&tport
->tp_write_wait
, &wait
);
1506 /* flush any remaining data in the buffer */
1508 ti_buf_clear(tport
->tp_write_buf
);
1510 spin_unlock_irq(&tport
->tp_lock
);
1512 mutex_lock(&port
->serial
->disc_mutex
);
1513 /* wait for data to drain from the device */
1514 /* wait for empty tx register, plus 20 ms */
1516 tport
->tp_lsr
&= ~TI_LSR_TX_EMPTY
;
1517 while ((long)(jiffies
- timeout
) < 0 && !signal_pending(current
)
1518 && !(tport
->tp_lsr
&TI_LSR_TX_EMPTY
) && !tdev
->td_urb_error
1519 && !port
->serial
->disconnected
) {
1520 if (ti_get_lsr(tport
))
1522 mutex_unlock(&port
->serial
->disc_mutex
);
1523 msleep_interruptible(20);
1524 mutex_lock(&port
->serial
->disc_mutex
);
1526 mutex_unlock(&port
->serial
->disc_mutex
);
1530 static void ti_stop_read(struct ti_port
*tport
, struct tty_struct
*tty
)
1532 unsigned long flags
;
1534 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1536 if (tport
->tp_read_urb_state
== TI_READ_URB_RUNNING
)
1537 tport
->tp_read_urb_state
= TI_READ_URB_STOPPING
;
1539 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1543 static int ti_restart_read(struct ti_port
*tport
, struct tty_struct
*tty
)
1547 unsigned long flags
;
1549 spin_lock_irqsave(&tport
->tp_lock
, flags
);
1551 if (tport
->tp_read_urb_state
== TI_READ_URB_STOPPED
) {
1552 tport
->tp_read_urb_state
= TI_READ_URB_RUNNING
;
1553 urb
= tport
->tp_port
->read_urb
;
1554 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1555 urb
->complete
= ti_bulk_in_callback
;
1556 urb
->context
= tport
;
1557 urb
->dev
= tport
->tp_port
->serial
->dev
;
1558 status
= usb_submit_urb(urb
, GFP_KERNEL
);
1560 tport
->tp_read_urb_state
= TI_READ_URB_RUNNING
;
1561 spin_unlock_irqrestore(&tport
->tp_lock
, flags
);
1568 static int ti_command_out_sync(struct ti_device
*tdev
, __u8 command
,
1569 __u16 moduleid
, __u16 value
, __u8
*data
, int size
)
1573 status
= usb_control_msg(tdev
->td_serial
->dev
,
1574 usb_sndctrlpipe(tdev
->td_serial
->dev
, 0), command
,
1575 (USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_OUT
),
1576 value
, moduleid
, data
, size
, 1000);
1588 static int ti_command_in_sync(struct ti_device
*tdev
, __u8 command
,
1589 __u16 moduleid
, __u16 value
, __u8
*data
, int size
)
1593 status
= usb_control_msg(tdev
->td_serial
->dev
,
1594 usb_rcvctrlpipe(tdev
->td_serial
->dev
, 0), command
,
1595 (USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
),
1596 value
, moduleid
, data
, size
, 1000);
1608 static int ti_write_byte(struct ti_device
*tdev
, unsigned long addr
,
1609 __u8 mask
, __u8 byte
)
1613 struct ti_write_data_bytes
*data
;
1614 struct device
*dev
= &tdev
->td_serial
->dev
->dev
;
1616 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1617 __func__
, addr
, mask
, byte
);
1619 size
= sizeof(struct ti_write_data_bytes
) + 2;
1620 data
= kmalloc(size
, GFP_KERNEL
);
1622 dev_err(dev
, "%s - out of memory\n", __func__
);
1626 data
->bAddrType
= TI_RW_DATA_ADDR_XDATA
;
1627 data
->bDataType
= TI_RW_DATA_BYTE
;
1628 data
->bDataCounter
= 1;
1629 data
->wBaseAddrHi
= cpu_to_be16(addr
>>16);
1630 data
->wBaseAddrLo
= cpu_to_be16(addr
);
1631 data
->bData
[0] = mask
;
1632 data
->bData
[1] = byte
;
1634 status
= ti_command_out_sync(tdev
, TI_WRITE_DATA
, TI_RAM_PORT
, 0,
1635 (__u8
*)data
, size
);
1638 dev_err(dev
, "%s - failed, %d\n", __func__
, status
);
1645 static int ti_do_download(struct usb_device
*dev
, int pipe
,
1646 u8
*buffer
, int size
)
1651 struct ti_firmware_header
*header
;
1655 for (pos
= sizeof(struct ti_firmware_header
); pos
< size
; pos
++)
1656 cs
= (__u8
)(cs
+ buffer
[pos
]);
1658 header
= (struct ti_firmware_header
*)buffer
;
1659 header
->wLength
= cpu_to_le16((__u16
)(size
1660 - sizeof(struct ti_firmware_header
)));
1661 header
->bCheckSum
= cs
;
1663 dbg("%s - downloading firmware", __func__
);
1664 for (pos
= 0; pos
< size
; pos
+= done
) {
1665 len
= min(size
- pos
, TI_DOWNLOAD_MAX_PACKET_SIZE
);
1666 status
= usb_bulk_msg(dev
, pipe
, buffer
+ pos
, len
,
1674 static int ti_download_firmware(struct ti_device
*tdev
, int type
)
1676 int status
= -ENOMEM
;
1679 struct usb_device
*dev
= tdev
->td_serial
->dev
;
1680 unsigned int pipe
= usb_sndbulkpipe(dev
,
1681 tdev
->td_serial
->port
[0]->bulk_out_endpointAddress
);
1682 const struct firmware
*fw_p
;
1684 sprintf(buf
, "ti_usb-%d.bin", type
);
1686 if (request_firmware(&fw_p
, buf
, &dev
->dev
)) {
1687 dev_err(&dev
->dev
, "%s - firmware not found\n", __func__
);
1690 if (fw_p
->size
> TI_FIRMWARE_BUF_SIZE
) {
1691 dev_err(&dev
->dev
, "%s - firmware too large\n", __func__
);
1695 buffer_size
= TI_FIRMWARE_BUF_SIZE
+ sizeof(struct ti_firmware_header
);
1696 buffer
= kmalloc(buffer_size
, GFP_KERNEL
);
1698 memcpy(buffer
, fw_p
->data
, fw_p
->size
);
1699 memset(buffer
+ fw_p
->size
, 0xff, buffer_size
- fw_p
->size
);
1700 status
= ti_do_download(dev
, pipe
, buffer
, fw_p
->size
);
1703 release_firmware(fw_p
);
1705 dev_err(&dev
->dev
, "%s - error downloading firmware, %d\n",
1710 dbg("%s - download successful", __func__
);
1716 /* Circular Buffer Functions */
1721 * Allocate a circular buffer and all associated memory.
1724 static struct circ_buf
*ti_buf_alloc(void)
1726 struct circ_buf
*cb
;
1728 cb
= kmalloc(sizeof(struct circ_buf
), GFP_KERNEL
);
1732 cb
->buf
= kmalloc(TI_WRITE_BUF_SIZE
, GFP_KERNEL
);
1733 if (cb
->buf
== NULL
) {
1747 * Free the buffer and all associated memory.
1750 static void ti_buf_free(struct circ_buf
*cb
)
1760 * Clear out all data in the circular buffer.
1763 static void ti_buf_clear(struct circ_buf
*cb
)
1765 cb
->head
= cb
->tail
= 0;
1772 * Return the number of bytes of data available in the circular
1776 static int ti_buf_data_avail(struct circ_buf
*cb
)
1778 return CIRC_CNT(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1783 * ti_buf_space_avail
1785 * Return the number of bytes of space available in the circular
1789 static int ti_buf_space_avail(struct circ_buf
*cb
)
1791 return CIRC_SPACE(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1798 * Copy data data from a user buffer and put it into the circular buffer.
1799 * Restrict to the amount of space available.
1801 * Return the number of bytes copied.
1804 static int ti_buf_put(struct circ_buf
*cb
, const char *buf
, int count
)
1809 c
= CIRC_SPACE_TO_END(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1814 memcpy(cb
->buf
+ cb
->head
, buf
, c
);
1815 cb
->head
= (cb
->head
+ c
) & (TI_WRITE_BUF_SIZE
-1);
1828 * Get data from the circular buffer and copy to the given buffer.
1829 * Restrict to the amount of data available.
1831 * Return the number of bytes copied.
1834 static int ti_buf_get(struct circ_buf
*cb
, char *buf
, int count
)
1839 c
= CIRC_CNT_TO_END(cb
->head
, cb
->tail
, TI_WRITE_BUF_SIZE
);
1844 memcpy(buf
, cb
->buf
+ cb
->tail
, c
);
1845 cb
->tail
= (cb
->tail
+ c
) & (TI_WRITE_BUF_SIZE
-1);