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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / drivers / net / usb / hso.c
CommitLineData
04672fe6 1// SPDX-License-Identifier: GPL-2.0-only
72dc1c09
GKH		 2/******************************************************************************
3 *
4 * Driver for Option High Speed Mobile Devices.
5 *
6 * Copyright (C) 2008 Option International
11cd29b0
DJB		 7 * Filip Aben <f.aben@option.com>
8 * Denis Joseph Barrow <d.barow@option.com>
3b7d2b31 9 * Jan Dumon <j.dumon@option.com>
72dc1c09
GKH		 10 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
11 * <ajb@spheresystems.co.uk>
12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
13 * Copyright (C) 2008 Novell, Inc.
14 *
72dc1c09
GKH		 15 *****************************************************************************/
16
17/******************************************************************************
18 *
19 * Description of the device:
20 *
21 * Interface 0: Contains the IP network interface on the bulk end points.
22 * The multiplexed serial ports are using the interrupt and
23 * control endpoints.
24 * Interrupt contains a bitmap telling which multiplexed
25 * serialport needs servicing.
26 *
27 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
28 * port is opened, as this have a huge impact on the network port
29 * throughput.
30 *
542f5482
DJB		 31 * Interface 2: Standard modem interface - circuit switched interface, this
32 * can be used to make a standard ppp connection however it
33 * should not be used in conjunction with the IP network interface
34 * enabled for USB performance reasons i.e. if using this set
35 * ideally disable_net=1.
72dc1c09
GKH		 36 *
37 *****************************************************************************/
38
3981cce6
JP		 39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
174cd4b1 41#include <linux/sched/signal.h>
72dc1c09
GKH		 42#include <linux/slab.h>
43#include <linux/init.h>
44#include <linux/delay.h>
45#include <linux/netdevice.h>
46#include <linux/module.h>
47#include <linux/ethtool.h>
48#include <linux/usb.h>
72dc1c09
GKH		 49#include <linux/tty.h>
50#include <linux/tty_driver.h>
51#include <linux/tty_flip.h>
52#include <linux/kmod.h>
53#include <linux/rfkill.h>
54#include <linux/ip.h>
55#include <linux/uaccess.h>
56#include <linux/usb/cdc.h>
57#include <net/arp.h>
58#include <asm/byteorder.h>
542f5482
DJB		 59#include <linux/serial_core.h>
60#include <linux/serial.h>
72dc1c09
GKH		 61
62
72dc1c09
GKH		 63#define MOD_AUTHOR "Option Wireless"
64#define MOD_DESCRIPTION "USB High Speed Option driver"
72dc1c09
GKH		 65
66#define HSO_MAX_NET_DEVICES 10
67#define HSO__MAX_MTU 2048
68#define DEFAULT_MTU 1500
69#define DEFAULT_MRU 1500
70
71#define CTRL_URB_RX_SIZE 1024
72#define CTRL_URB_TX_SIZE 64
73
74#define BULK_URB_RX_SIZE 4096
75#define BULK_URB_TX_SIZE 8192
76
77#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
78#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
79#define MUX_BULK_RX_BUF_COUNT 4
80#define USB_TYPE_OPTION_VENDOR 0x20
81
82/* These definitions are used with the struct hso_net flags element */
83/* - use *_bit operations on it. (bit indices not values.) */
84#define HSO_NET_RUNNING 0
85
86#define HSO_NET_TX_TIMEOUT (HZ*10)
87
72dc1c09
GKH		 88#define HSO_SERIAL_MAGIC 0x48534f31
89
90/* Number of ttys to handle */
91#define HSO_SERIAL_TTY_MINORS 256
92
93#define MAX_RX_URBS 2
94
72dc1c09
GKH		 95/*****************************************************************************/
96/* Debugging functions */
97/*****************************************************************************/
95a69117
JP		 98#define hso_dbg(lvl, fmt, ...) \
99do { \
100 if ((lvl) & debug) \
101 pr_info("[%d:%s] " fmt, \
102 __LINE__, __func__, ##__VA_ARGS__); \
103} while (0)
72dc1c09
GKH		 104
105/*****************************************************************************/
106/* Enumerators */
107/*****************************************************************************/
108enum pkt_parse_state {
109 WAIT_IP,
110 WAIT_DATA,
111 WAIT_SYNC
112};
113
114/*****************************************************************************/
115/* Structs */
116/*****************************************************************************/
117
118struct hso_shared_int {
119 struct usb_endpoint_descriptor *intr_endp;
120 void *shared_intr_buf;
121 struct urb *shared_intr_urb;
122 struct usb_device *usb;
123 int use_count;
124 int ref_count;
125 struct mutex shared_int_lock;
126};
127
128struct hso_net {
129 struct hso_device *parent;
130 struct net_device *net;
131 struct rfkill *rfkill;
38121067 132 char name[24];
72dc1c09
GKH		 133
134 struct usb_endpoint_descriptor *in_endp;
135 struct usb_endpoint_descriptor *out_endp;
136
137 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
138 struct urb *mux_bulk_tx_urb;
139 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
140 void *mux_bulk_tx_buf;
141
142 struct sk_buff *skb_rx_buf;
143 struct sk_buff *skb_tx_buf;
144
145 enum pkt_parse_state rx_parse_state;
146 spinlock_t net_lock;
147
148 unsigned short rx_buf_size;
149 unsigned short rx_buf_missing;
150 struct iphdr rx_ip_hdr;
151
152 unsigned long flags;
153};
154
8ef5ba63
DJB		 155enum rx_ctrl_state{
156 RX_IDLE,
157 RX_SENT,
158 RX_PENDING
159};
160
542f5482
DJB		 161#define BM_REQUEST_TYPE (0xa1)
162#define B_NOTIFICATION (0x20)
163#define W_VALUE (0x0)
542f5482
DJB		 164#define W_LENGTH (0x2)
165
166#define B_OVERRUN (0x1<<6)
167#define B_PARITY (0x1<<5)
168#define B_FRAMING (0x1<<4)
169#define B_RING_SIGNAL (0x1<<3)
170#define B_BREAK (0x1<<2)
171#define B_TX_CARRIER (0x1<<1)
172#define B_RX_CARRIER (0x1<<0)
173
174struct hso_serial_state_notification {
175 u8 bmRequestType;
176 u8 bNotification;
177 u16 wValue;
178 u16 wIndex;
179 u16 wLength;
180 u16 UART_state_bitmap;
ba2d3587 181} __packed;
542f5482
DJB		 182
183struct hso_tiocmget {
184 struct mutex mutex;
185 wait_queue_head_t waitq;
186 int intr_completed;
187 struct usb_endpoint_descriptor *endp;
188 struct urb *urb;
af0de130 189 struct hso_serial_state_notification *serial_state_notification;
542f5482
DJB		 190 u16 prev_UART_state_bitmap;
191 struct uart_icount icount;
192};
193
194
72dc1c09
GKH		 195struct hso_serial {
196 struct hso_device *parent;
197 int magic;
198 u8 minor;
199
200 struct hso_shared_int *shared_int;
201
202 /* rx/tx urb could be either a bulk urb or a control urb depending
203 on which serial port it is used on. */
204 struct urb *rx_urb[MAX_RX_URBS];
205 u8 num_rx_urbs;
206 u8 *rx_data[MAX_RX_URBS];
207 u16 rx_data_length; /* should contain allocated length */
208
209 struct urb *tx_urb;
210 u8 *tx_data;
211 u8 *tx_buffer;
212 u16 tx_data_length; /* should contain allocated length */
213 u16 tx_data_count;
214 u16 tx_buffer_count;
215 struct usb_ctrlrequest ctrl_req_tx;
216 struct usb_ctrlrequest ctrl_req_rx;
217
218 struct usb_endpoint_descriptor *in_endp;
219 struct usb_endpoint_descriptor *out_endp;
220
8ef5ba63 221 enum rx_ctrl_state rx_state;
72dc1c09
GKH		 222 u8 rts_state;
223 u8 dtr_state;
224 unsigned tx_urb_used:1;
225
5ce76e77 226 struct tty_port port;
72dc1c09 227 /* from usb_serial_port */
72dc1c09
GKH		 228 spinlock_t serial_lock;
229
230 int (*write_data) (struct hso_serial *serial);
542f5482 231 struct hso_tiocmget *tiocmget;
8ef5ba63
DJB		 232 /* Hacks required to get flow control
233 * working on the serial receive buffers
234 * so as not to drop characters on the floor.
235 */
236 int curr_rx_urb_idx;
8ef5ba63
DJB		 237 u8 rx_urb_filled[MAX_RX_URBS];
238 struct tasklet_struct unthrottle_tasklet;
72dc1c09
GKH		 239};
240
241struct hso_device {
242 union {
243 struct hso_serial *dev_serial;
244 struct hso_net *dev_net;
245 } port_data;
246
247 u32 port_spec;
248
249 u8 is_active;
250 u8 usb_gone;
251 struct work_struct async_get_intf;
252 struct work_struct async_put_intf;
253
254 struct usb_device *usb;
255 struct usb_interface *interface;
256
257 struct device *dev;
258 struct kref ref;
ab153d84 259 struct mutex mutex;
72dc1c09
GKH		 260};
261
262/* Type of interface */
263#define HSO_INTF_MASK 0xFF00
264#define HSO_INTF_MUX 0x0100
265#define HSO_INTF_BULK 0x0200
266
267/* Type of port */
268#define HSO_PORT_MASK 0xFF
269#define HSO_PORT_NO_PORT 0x0
270#define HSO_PORT_CONTROL 0x1
271#define HSO_PORT_APP 0x2
272#define HSO_PORT_GPS 0x3
273#define HSO_PORT_PCSC 0x4
274#define HSO_PORT_APP2 0x5
275#define HSO_PORT_GPS_CONTROL 0x6
276#define HSO_PORT_MSD 0x7
277#define HSO_PORT_VOICE 0x8
278#define HSO_PORT_DIAG2 0x9
279#define HSO_PORT_DIAG 0x10
280#define HSO_PORT_MODEM 0x11
281#define HSO_PORT_NETWORK 0x12
282
283/* Additional device info */
284#define HSO_INFO_MASK 0xFF000000
285#define HSO_INFO_CRC_BUG 0x01000000
286
287/*****************************************************************************/
288/* Prototypes */
289/*****************************************************************************/
290/* Serial driver functions */
20b9d177 291static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 292 unsigned int set, unsigned int clear);
293static void ctrl_callback(struct urb *urb);
8ef5ba63 294static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
72dc1c09
GKH		 295static void hso_kick_transmit(struct hso_serial *serial);
296/* Helper functions */
297static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
298 struct usb_device *usb, gfp_t gfp);
68a351c5
JD		 299static void handle_usb_error(int status, const char *function,
300 struct hso_device *hso_dev);
72dc1c09
GKH		 301static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
302 int type, int dir);
303static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
304static void hso_free_interface(struct usb_interface *intf);
305static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
306static int hso_stop_serial_device(struct hso_device *hso_dev);
307static int hso_start_net_device(struct hso_device *hso_dev);
308static void hso_free_shared_int(struct hso_shared_int *shared_int);
309static int hso_stop_net_device(struct hso_device *hso_dev);
310static void hso_serial_ref_free(struct kref *ref);
8ef5ba63
DJB		 311static void hso_std_serial_read_bulk_callback(struct urb *urb);
312static int hso_mux_serial_read(struct hso_serial *serial);
72dc1c09
GKH		 313static void async_get_intf(struct work_struct *data);
314static void async_put_intf(struct work_struct *data);
315static int hso_put_activity(struct hso_device *hso_dev);
316static int hso_get_activity(struct hso_device *hso_dev);
542f5482 317static void tiocmget_intr_callback(struct urb *urb);
72dc1c09
GKH		 318/*****************************************************************************/
319/* Helping functions */
320/*****************************************************************************/
321
322/* #define DEBUG */
323
0235f641
GKH		 324static inline struct hso_net *dev2net(struct hso_device *hso_dev)
325{
326 return hso_dev->port_data.dev_net;
327}
328
329static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
330{
331 return hso_dev->port_data.dev_serial;
332}
72dc1c09
GKH		 333
334/* Debugging functions */
335#ifdef DEBUG
336static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
337 unsigned int len)
338{
0235f641 339 static char name[255];
72dc1c09 340
0235f641
GKH		 341 sprintf(name, "hso[%d:%s]", line_count, func_name);
342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 343}
344
345#define DUMP(buf_, len_) \
9ce673d5 346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
72dc1c09
GKH		 347
348#define DUMP1(buf_, len_) \
349 do { \
350 if (0x01 & debug) \
351 DUMP(buf_, len_); \
352 } while (0)
353#else
354#define DUMP(buf_, len_)
355#define DUMP1(buf_, len_)
356#endif
357
358/* module parameters */
359static int debug;
360static int tty_major;
361static int disable_net;
362
363/* driver info */
364static const char driver_name[] = "hso";
365static const char tty_filename[] = "ttyHS";
242647bc 366static const char *version = __FILE__ ": " MOD_AUTHOR;
72dc1c09
GKH		 367/* the usb driver itself (registered in hso_init) */
368static struct usb_driver hso_driver;
369/* serial structures */
370static struct tty_driver *tty_drv;
371static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
372static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
373static spinlock_t serial_table_lock;
72dc1c09
GKH		 374
375static const s32 default_port_spec[] = {
376 HSO_INTF_MUX | HSO_PORT_NETWORK,
377 HSO_INTF_BULK | HSO_PORT_DIAG,
378 HSO_INTF_BULK | HSO_PORT_MODEM,
379 0
380};
381
382static const s32 icon321_port_spec[] = {
383 HSO_INTF_MUX | HSO_PORT_NETWORK,
384 HSO_INTF_BULK | HSO_PORT_DIAG2,
385 HSO_INTF_BULK | HSO_PORT_MODEM,
386 HSO_INTF_BULK | HSO_PORT_DIAG,
387 0
388};
389
390#define default_port_device(vendor, product) \
391 USB_DEVICE(vendor, product), \
392 .driver_info = (kernel_ulong_t)default_port_spec
393
394#define icon321_port_device(vendor, product) \
395 USB_DEVICE(vendor, product), \
396 .driver_info = (kernel_ulong_t)icon321_port_spec
397
398/* list of devices we support */
399static const struct usb_device_id hso_ids[] = {
400 {default_port_device(0x0af0, 0x6711)},
401 {default_port_device(0x0af0, 0x6731)},
402 {default_port_device(0x0af0, 0x6751)},
403 {default_port_device(0x0af0, 0x6771)},
404 {default_port_device(0x0af0, 0x6791)},
405 {default_port_device(0x0af0, 0x6811)},
406 {default_port_device(0x0af0, 0x6911)},
407 {default_port_device(0x0af0, 0x6951)},
408 {default_port_device(0x0af0, 0x6971)},
409 {default_port_device(0x0af0, 0x7011)},
410 {default_port_device(0x0af0, 0x7031)},
411 {default_port_device(0x0af0, 0x7051)},
412 {default_port_device(0x0af0, 0x7071)},
413 {default_port_device(0x0af0, 0x7111)},
414 {default_port_device(0x0af0, 0x7211)},
415 {default_port_device(0x0af0, 0x7251)},
416 {default_port_device(0x0af0, 0x7271)},
417 {default_port_device(0x0af0, 0x7311)},
418 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
419 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
420 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 421 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 422 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
423 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
67dd8246 424 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
72dc1c09
GKH		 425 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
426 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
427 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
bab04c3a 428 {USB_DEVICE(0x0af0, 0x7701)},
ec157937 429 {USB_DEVICE(0x0af0, 0x7706)},
bab04c3a
DJB		 430 {USB_DEVICE(0x0af0, 0x7801)},
431 {USB_DEVICE(0x0af0, 0x7901)},
ec157937
JD		 432 {USB_DEVICE(0x0af0, 0x7A01)},
433 {USB_DEVICE(0x0af0, 0x7A05)},
9961d842
JD		 434 {USB_DEVICE(0x0af0, 0x8200)},
435 {USB_DEVICE(0x0af0, 0x8201)},
ec157937
JD		 436 {USB_DEVICE(0x0af0, 0x8300)},
437 {USB_DEVICE(0x0af0, 0x8302)},
438 {USB_DEVICE(0x0af0, 0x8304)},
439 {USB_DEVICE(0x0af0, 0x8400)},
dd7496f2
FA		 440 {USB_DEVICE(0x0af0, 0x8600)},
441 {USB_DEVICE(0x0af0, 0x8800)},
442 {USB_DEVICE(0x0af0, 0x8900)},
5c7bf2f4 443 {USB_DEVICE(0x0af0, 0x9000)},
61ab9efd 444 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
9961d842 445 {USB_DEVICE(0x0af0, 0xd035)},
67dd8246 446 {USB_DEVICE(0x0af0, 0xd055)},
9961d842
JD		 447 {USB_DEVICE(0x0af0, 0xd155)},
448 {USB_DEVICE(0x0af0, 0xd255)},
449 {USB_DEVICE(0x0af0, 0xd057)},
450 {USB_DEVICE(0x0af0, 0xd157)},
451 {USB_DEVICE(0x0af0, 0xd257)},
452 {USB_DEVICE(0x0af0, 0xd357)},
ec157937
JD		 453 {USB_DEVICE(0x0af0, 0xd058)},
454 {USB_DEVICE(0x0af0, 0xc100)},
72dc1c09
GKH		 455 {}
456};
457MODULE_DEVICE_TABLE(usb, hso_ids);
458
459/* Sysfs attribute */
460static ssize_t hso_sysfs_show_porttype(struct device *dev,
461 struct device_attribute *attr,
462 char *buf)
463{
1aec5bdf 464 struct hso_device *hso_dev = dev_get_drvdata(dev);
72dc1c09
GKH		 465 char *port_name;
466
467 if (!hso_dev)
468 return 0;
469
470 switch (hso_dev->port_spec & HSO_PORT_MASK) {
471 case HSO_PORT_CONTROL:
472 port_name = "Control";
473 break;
474 case HSO_PORT_APP:
475 port_name = "Application";
476 break;
477 case HSO_PORT_APP2:
478 port_name = "Application2";
479 break;
480 case HSO_PORT_GPS:
481 port_name = "GPS";
482 break;
483 case HSO_PORT_GPS_CONTROL:
484 port_name = "GPS Control";
485 break;
486 case HSO_PORT_PCSC:
487 port_name = "PCSC";
488 break;
489 case HSO_PORT_DIAG:
490 port_name = "Diagnostic";
491 break;
492 case HSO_PORT_DIAG2:
493 port_name = "Diagnostic2";
494 break;
495 case HSO_PORT_MODEM:
496 port_name = "Modem";
497 break;
498 case HSO_PORT_NETWORK:
499 port_name = "Network";
500 break;
501 default:
502 port_name = "Unknown";
503 break;
504 }
505
506 return sprintf(buf, "%s\n", port_name);
507}
d61e4038 508static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL);
72dc1c09 509
4134069f
TI		 510static struct attribute *hso_serial_dev_attrs[] = {
511 &dev_attr_hsotype.attr,
512 NULL
513};
514
515ATTRIBUTE_GROUPS(hso_serial_dev);
516
8ef5ba63
DJB		 517static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
518{
519 int idx;
520
521 for (idx = 0; idx < serial->num_rx_urbs; idx++)
522 if (serial->rx_urb[idx] == urb)
523 return idx;
524 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
525 return -1;
526}
527
72dc1c09
GKH		 528/* converts mux value to a port spec value */
529static u32 hso_mux_to_port(int mux)
530{
531 u32 result;
532
533 switch (mux) {
534 case 0x1:
535 result = HSO_PORT_CONTROL;
536 break;
537 case 0x2:
538 result = HSO_PORT_APP;
539 break;
540 case 0x4:
541 result = HSO_PORT_PCSC;
542 break;
543 case 0x8:
544 result = HSO_PORT_GPS;
545 break;
546 case 0x10:
547 result = HSO_PORT_APP2;
548 break;
549 default:
550 result = HSO_PORT_NO_PORT;
551 }
552 return result;
553}
554
555/* converts port spec value to a mux value */
556static u32 hso_port_to_mux(int port)
557{
558 u32 result;
559
560 switch (port & HSO_PORT_MASK) {
561 case HSO_PORT_CONTROL:
562 result = 0x0;
563 break;
564 case HSO_PORT_APP:
565 result = 0x1;
566 break;
567 case HSO_PORT_PCSC:
568 result = 0x2;
569 break;
570 case HSO_PORT_GPS:
571 result = 0x3;
572 break;
573 case HSO_PORT_APP2:
574 result = 0x4;
575 break;
576 default:
577 result = 0x0;
578 }
579 return result;
580}
581
582static struct hso_serial *get_serial_by_shared_int_and_type(
583 struct hso_shared_int *shared_int,
584 int mux)
585{
586 int i, port;
587
588 port = hso_mux_to_port(mux);
589
590 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 591 if (serial_table[i] &&
592 (dev2ser(serial_table[i])->shared_int == shared_int) &&
593 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
72dc1c09
GKH		 594 return dev2ser(serial_table[i]);
595 }
596 }
597
598 return NULL;
599}
600
601static struct hso_serial *get_serial_by_index(unsigned index)
602{
0235f641 603 struct hso_serial *serial = NULL;
72dc1c09
GKH		 604 unsigned long flags;
605
72dc1c09 606 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 607 if (serial_table[index])
608 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 609 spin_unlock_irqrestore(&serial_table_lock, flags);
610
611 return serial;
612}
613
614static int get_free_serial_index(void)
615{
616 int index;
617 unsigned long flags;
618
619 spin_lock_irqsave(&serial_table_lock, flags);
620 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
621 if (serial_table[index] == NULL) {
622 spin_unlock_irqrestore(&serial_table_lock, flags);
623 return index;
624 }
625 }
626 spin_unlock_irqrestore(&serial_table_lock, flags);
627
3981cce6 628 pr_err("%s: no free serial devices in table\n", __func__);
72dc1c09
GKH		 629 return -1;
630}
631
632static void set_serial_by_index(unsigned index, struct hso_serial *serial)
633{
634 unsigned long flags;
0235f641 635
72dc1c09
GKH		 636 spin_lock_irqsave(&serial_table_lock, flags);
637 if (serial)
638 serial_table[index] = serial->parent;
639 else
640 serial_table[index] = NULL;
641 spin_unlock_irqrestore(&serial_table_lock, flags);
642}
643
68a351c5
JD		 644static void handle_usb_error(int status, const char *function,
645 struct hso_device *hso_dev)
72dc1c09
GKH		 646{
647 char *explanation;
648
649 switch (status) {
650 case -ENODEV:
651 explanation = "no device";
652 break;
653 case -ENOENT:
654 explanation = "endpoint not enabled";
655 break;
656 case -EPIPE:
657 explanation = "endpoint stalled";
658 break;
659 case -ENOSPC:
660 explanation = "not enough bandwidth";
661 break;
662 case -ESHUTDOWN:
663 explanation = "device disabled";
664 break;
665 case -EHOSTUNREACH:
666 explanation = "device suspended";
667 break;
668 case -EINVAL:
669 case -EAGAIN:
670 case -EFBIG:
671 case -EMSGSIZE:
672 explanation = "internal error";
673 break;
68a351c5
JD		 674 case -EILSEQ:
675 case -EPROTO:
676 case -ETIME:
677 case -ETIMEDOUT:
678 explanation = "protocol error";
679 if (hso_dev)
26c1f1f5 680 usb_queue_reset_device(hso_dev->interface);
68a351c5 681 break;
72dc1c09
GKH		 682 default:
683 explanation = "unknown status";
684 break;
685 }
68a351c5
JD		 686
687 /* log a meaningful explanation of an USB status */
95a69117
JP		 688 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
689 function, explanation, status);
72dc1c09
GKH		 690}
691
692/* Network interface functions */
693
694/* called when net interface is brought up by ifconfig */
695static int hso_net_open(struct net_device *net)
696{
697 struct hso_net *odev = netdev_priv(net);
698 unsigned long flags = 0;
699
700 if (!odev) {
701 dev_err(&net->dev, "No net device !\n");
702 return -ENODEV;
703 }
704
705 odev->skb_tx_buf = NULL;
706
707 /* setup environment */
708 spin_lock_irqsave(&odev->net_lock, flags);
709 odev->rx_parse_state = WAIT_IP;
710 odev->rx_buf_size = 0;
711 odev->rx_buf_missing = sizeof(struct iphdr);
712 spin_unlock_irqrestore(&odev->net_lock, flags);
713
72dc1c09
GKH		 714 /* We are up and running. */
715 set_bit(HSO_NET_RUNNING, &odev->flags);
889bd9b6 716 hso_start_net_device(odev->parent);
72dc1c09
GKH		 717
718 /* Tell the kernel we are ready to start receiving from it */
719 netif_start_queue(net);
720
721 return 0;
722}
723
724/* called when interface is brought down by ifconfig */
725static int hso_net_close(struct net_device *net)
726{
727 struct hso_net *odev = netdev_priv(net);
728
729 /* we don't need the queue anymore */
730 netif_stop_queue(net);
731 /* no longer running */
732 clear_bit(HSO_NET_RUNNING, &odev->flags);
733
734 hso_stop_net_device(odev->parent);
735
736 /* done */
737 return 0;
738}
739
740/* USB tells is xmit done, we should start the netqueue again */
741static void write_bulk_callback(struct urb *urb)
742{
743 struct hso_net *odev = urb->context;
744 int status = urb->status;
745
746 /* Sanity check */
747 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
748 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
749 return;
750 }
751
752 /* Do we still have a valid kernel network device? */
753 if (!netif_device_present(odev->net)) {
754 dev_err(&urb->dev->dev, "%s: net device not present\n",
755 __func__);
756 return;
757 }
758
759 /* log status, but don't act on it, we don't need to resubmit anything
760 * anyhow */
761 if (status)
68a351c5 762 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 763
764 hso_put_activity(odev->parent);
765
766 /* Tell the network interface we are ready for another frame */
767 netif_wake_queue(odev->net);
768}
769
770/* called by kernel when we need to transmit a packet */
25a79c41
SH		 771static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
772 struct net_device *net)
72dc1c09
GKH		 773{
774 struct hso_net *odev = netdev_priv(net);
775 int result;
776
777 /* Tell the kernel, "No more frames 'til we are done with this one." */
778 netif_stop_queue(net);
779 if (hso_get_activity(odev->parent) == -EAGAIN) {
780 odev->skb_tx_buf = skb;
6ed10654 781 return NETDEV_TX_OK;
72dc1c09
GKH		 782 }
783
784 /* log if asked */
785 DUMP1(skb->data, skb->len);
786 /* Copy it from kernel memory to OUR memory */
787 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
95a69117 788 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
72dc1c09
GKH		 789
790 /* Fill in the URB for shipping it out. */
791 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
792 odev->parent->usb,
793 usb_sndbulkpipe(odev->parent->usb,
794 odev->out_endp->
795 bEndpointAddress & 0x7F),
796 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
797 odev);
798
799 /* Deal with the Zero Length packet problem, I hope */
800 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
801
802 /* Send the URB on its merry way. */
803 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
804 if (result) {
805 dev_warn(&odev->parent->interface->dev,
8a5c9c49 806 "failed mux_bulk_tx_urb %d\n", result);
72dc1c09
GKH		 807 net->stats.tx_errors++;
808 netif_start_queue(net);
809 } else {
810 net->stats.tx_packets++;
811 net->stats.tx_bytes += skb->len;
72dc1c09
GKH		 812 }
813 dev_kfree_skb(skb);
814 /* we're done */
5b2c4b97 815 return NETDEV_TX_OK;
72dc1c09
GKH		 816}
817
0fc0b732 818static const struct ethtool_ops ops = {
72dc1c09
GKH		 819 .get_link = ethtool_op_get_link
820};
821
822/* called when a packet did not ack after watchdogtimeout */
0290bd29 823static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue)
72dc1c09
GKH		 824{
825 struct hso_net *odev = netdev_priv(net);
826
827 if (!odev)
828 return;
829
830 /* Tell syslog we are hosed. */
831 dev_warn(&net->dev, "Tx timed out.\n");
832
833 /* Tear the waiting frame off the list */
8e95a202
JP		 834 if (odev->mux_bulk_tx_urb &&
835 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
72dc1c09
GKH		 836 usb_unlink_urb(odev->mux_bulk_tx_urb);
837
838 /* Update statistics */
839 net->stats.tx_errors++;
840}
841
842/* make a real packet from the received USB buffer */
843static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
844 unsigned int count, unsigned char is_eop)
845{
846 unsigned short temp_bytes;
847 unsigned short buffer_offset = 0;
848 unsigned short frame_len;
72dc1c09
GKH		 849
850 /* log if needed */
95a69117 851 hso_dbg(0x1, "Rx %d bytes\n", count);
72dc1c09
GKH		 852 DUMP(ip_pkt, min(128, (int)count));
853
854 while (count) {
855 switch (odev->rx_parse_state) {
856 case WAIT_IP:
857 /* waiting for IP header. */
858 /* wanted bytes - size of ip header */
859 temp_bytes =
860 (count <
861 odev->rx_buf_missing) ? count : odev->
862 rx_buf_missing;
863
864 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
865 odev->rx_buf_size, ip_pkt + buffer_offset,
866 temp_bytes);
867
868 odev->rx_buf_size += temp_bytes;
869 buffer_offset += temp_bytes;
870 odev->rx_buf_missing -= temp_bytes;
871 count -= temp_bytes;
872
873 if (!odev->rx_buf_missing) {
874 /* header is complete allocate an sk_buffer and
875 * continue to WAIT_DATA */
876 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
877
878 if ((frame_len > DEFAULT_MRU) ||
879 (frame_len < sizeof(struct iphdr))) {
880 dev_err(&odev->net->dev,
881 "Invalid frame (%d) length\n",
882 frame_len);
883 odev->rx_parse_state = WAIT_SYNC;
884 continue;
885 }
886 /* Allocate an sk_buff */
d65a68a8
PZ		 887 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
888 frame_len);
72dc1c09
GKH		 889 if (!odev->skb_rx_buf) {
890 /* We got no receive buffer. */
95a69117 891 hso_dbg(0x1, "could not allocate memory\n");
72dc1c09 892 odev->rx_parse_state = WAIT_SYNC;
04166055 893 continue;
72dc1c09 894 }
72dc1c09
GKH		 895
896 /* Copy what we got so far. make room for iphdr
897 * after tail. */
b952f4df 898 skb_put_data(odev->skb_rx_buf,
899 (char *)&(odev->rx_ip_hdr),
900 sizeof(struct iphdr));
72dc1c09
GKH		 901
902 /* ETH_HLEN */
903 odev->rx_buf_size = sizeof(struct iphdr);
904
905 /* Filip actually use .tot_len */
906 odev->rx_buf_missing =
907 frame_len - sizeof(struct iphdr);
908 odev->rx_parse_state = WAIT_DATA;
909 }
910 break;
911
912 case WAIT_DATA:
913 temp_bytes = (count < odev->rx_buf_missing)
914 ? count : odev->rx_buf_missing;
915
916 /* Copy the rest of the bytes that are left in the
917 * buffer into the waiting sk_buf. */
918 /* Make room for temp_bytes after tail. */
b952f4df 919 skb_put_data(odev->skb_rx_buf,
920 ip_pkt + buffer_offset,
921 temp_bytes);
72dc1c09
GKH		 922
923 odev->rx_buf_missing -= temp_bytes;
924 count -= temp_bytes;
925 buffer_offset += temp_bytes;
926 odev->rx_buf_size += temp_bytes;
927 if (!odev->rx_buf_missing) {
928 /* Packet is complete. Inject into stack. */
929 /* We have IP packet here */
09640e63 930 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
72dc1c09
GKH		 931 skb_reset_mac_header(odev->skb_rx_buf);
932
933 /* Ship it off to the kernel */
934 netif_rx(odev->skb_rx_buf);
935 /* No longer our buffer. */
936 odev->skb_rx_buf = NULL;
937
938 /* update out statistics */
939 odev->net->stats.rx_packets++;
940
941 odev->net->stats.rx_bytes += odev->rx_buf_size;
942
943 odev->rx_buf_size = 0;
944 odev->rx_buf_missing = sizeof(struct iphdr);
945 odev->rx_parse_state = WAIT_IP;
946 }
947 break;
948
949 case WAIT_SYNC:
95a69117 950 hso_dbg(0x1, " W_S\n");
72dc1c09
GKH		 951 count = 0;
952 break;
953 default:
95a69117 954 hso_dbg(0x1, "\n");
72dc1c09
GKH		 955 count--;
956 break;
957 }
958 }
959
960 /* Recovery mechanism for WAIT_SYNC state. */
961 if (is_eop) {
962 if (odev->rx_parse_state == WAIT_SYNC) {
963 odev->rx_parse_state = WAIT_IP;
964 odev->rx_buf_size = 0;
965 odev->rx_buf_missing = sizeof(struct iphdr);
966 }
967 }
968}
969
5591c75d
JP		 970static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
971{
972 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
973 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
974
975 if (((rest == 5) || (rest == 6)) &&
976 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
977 crc_check, 4)) {
978 urb->actual_length -= 4;
979 }
980}
981
72dc1c09
GKH		 982/* Moving data from usb to kernel (in interrupt state) */
983static void read_bulk_callback(struct urb *urb)
984{
985 struct hso_net *odev = urb->context;
986 struct net_device *net;
987 int result;
12c4de4b 988 unsigned long flags;
72dc1c09
GKH		 989 int status = urb->status;
990
991 /* is al ok? (Filip: Who's Al ?) */
992 if (status) {
68a351c5 993 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 994 return;
995 }
996
997 /* Sanity check */
998 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
95a69117 999 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
72dc1c09
GKH		 1000 return;
1001 }
1002 usb_mark_last_busy(urb->dev);
1003
1004 net = odev->net;
1005
1006 if (!netif_device_present(net)) {
1007 /* Somebody killed our network interface... */
1008 return;
1009 }
1010
5591c75d
JP		 1011 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1012 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
72dc1c09
GKH		 1013
1014 /* do we even have a packet? */
1015 if (urb->actual_length) {
1016 /* Handle the IP stream, add header and push it onto network
1017 * stack if the packet is complete. */
12c4de4b 1018 spin_lock_irqsave(&odev->net_lock, flags);
72dc1c09
GKH		 1019 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1020 (urb->transfer_buffer_length >
1021 urb->actual_length) ? 1 : 0);
12c4de4b 1022 spin_unlock_irqrestore(&odev->net_lock, flags);
72dc1c09
GKH		 1023 }
1024
1025 /* We are done with this URB, resubmit it. Prep the USB to wait for
1026 * another frame. Reuse same as received. */
1027 usb_fill_bulk_urb(urb,
1028 odev->parent->usb,
1029 usb_rcvbulkpipe(odev->parent->usb,
1030 odev->in_endp->
1031 bEndpointAddress & 0x7F),
1032 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1033 read_bulk_callback, odev);
1034
1035 /* Give this to the USB subsystem so it can tell us when more data
1036 * arrives. */
1037 result = usb_submit_urb(urb, GFP_ATOMIC);
1038 if (result)
1039 dev_warn(&odev->parent->interface->dev,
8a5c9c49 1040 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
72dc1c09
GKH		 1041 result);
1042}
1043
1044/* Serial driver functions */
1045
ac9720c3 1046static void hso_init_termios(struct ktermios *termios)
72dc1c09 1047{
72dc1c09
GKH		 1048 /*
1049 * The default requirements for this device are:
1050 */
72dc1c09
GKH		 1051 termios->c_iflag &=
1052 ~(IGNBRK /* disable ignore break */
1053 | BRKINT /* disable break causes interrupt */
1054 | PARMRK /* disable mark parity errors */
1055 | ISTRIP /* disable clear high bit of input characters */
1056 | INLCR /* disable translate NL to CR */
1057 | IGNCR /* disable ignore CR */
1058 | ICRNL /* disable translate CR to NL */
1059 | IXON); /* disable enable XON/XOFF flow control */
1060
1061 /* disable postprocess output characters */
1062 termios->c_oflag &= ~OPOST;
1063
1064 termios->c_lflag &=
1065 ~(ECHO /* disable echo input characters */
1066 | ECHONL /* disable echo new line */
1067 | ICANON /* disable erase, kill, werase, and rprnt
1068 special characters */
1069 | ISIG /* disable interrupt, quit, and suspend special
1070 characters */
1071 | IEXTEN); /* disable non-POSIX special characters */
1072
1073 termios->c_cflag &=
1074 ~(CSIZE /* no size */
1075 | PARENB /* disable parity bit */
1076 | CBAUD /* clear current baud rate */
1077 | CBAUDEX); /* clear current buad rate */
1078
1079 termios->c_cflag |= CS8; /* character size 8 bits */
1080
1081 /* baud rate 115200 */
ac9720c3
AC		 1082 tty_termios_encode_baud_rate(termios, 115200, 115200);
1083}
1084
1085static void _hso_serial_set_termios(struct tty_struct *tty,
1086 struct ktermios *old)
1087{
30409420 1088 struct hso_serial *serial = tty->driver_data;
ac9720c3
AC		 1089
1090 if (!serial) {
3981cce6 1091 pr_err("%s: no tty structures", __func__);
ac9720c3
AC		 1092 return;
1093 }
1094
95a69117 1095 hso_dbg(0x8, "port %d\n", serial->minor);
72dc1c09
GKH		 1096
1097 /*
ac9720c3 1098 * Fix up unsupported bits
72dc1c09 1099 */
adc8d746 1100 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
ac9720c3 1101
adc8d746 1102 tty->termios.c_cflag &=
ac9720c3
AC		 1103 ~(CSIZE /* no size */
1104 | PARENB /* disable parity bit */
1105 | CBAUD /* clear current baud rate */
1106 | CBAUDEX); /* clear current buad rate */
1107
adc8d746 1108 tty->termios.c_cflag |= CS8; /* character size 8 bits */
ac9720c3
AC		 1109
1110 /* baud rate 115200 */
1111 tty_encode_baud_rate(tty, 115200, 115200);
72dc1c09
GKH		 1112}
1113
8ef5ba63
DJB		 1114static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1115{
1116 int result;
8ef5ba63
DJB		 1117 /* We are done with this URB, resubmit it. Prep the USB to wait for
1118 * another frame */
1119 usb_fill_bulk_urb(urb, serial->parent->usb,
1120 usb_rcvbulkpipe(serial->parent->usb,
1121 serial->in_endp->
1122 bEndpointAddress & 0x7F),
1123 urb->transfer_buffer, serial->rx_data_length,
1124 hso_std_serial_read_bulk_callback, serial);
1125 /* Give this to the USB subsystem so it can tell us when more data
1126 * arrives. */
1127 result = usb_submit_urb(urb, GFP_ATOMIC);
1128 if (result) {
1129 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1130 __func__, result);
1131 }
1132}
1133
1134
1135
1136
1137static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1138{
1139 int count;
1140 struct urb *curr_urb;
1141
1142 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1143 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1144 count = put_rxbuf_data(curr_urb, serial);
1145 if (count == -1)
1146 return;
1147 if (count == 0) {
1148 serial->curr_rx_urb_idx++;
1149 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1150 serial->curr_rx_urb_idx = 0;
1151 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1152 }
1153 }
1154}
1155
1156static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1157{
1158 int count = 0;
1159 struct urb *urb;
1160
1161 urb = serial->rx_urb[0];
5ce76e77 1162 if (serial->port.count > 0) {
8ef5ba63
DJB		 1163 count = put_rxbuf_data(urb, serial);
1164 if (count == -1)
1165 return;
1166 }
1167 /* Re issue a read as long as we receive data. */
1168
1169 if (count == 0 && ((urb->actual_length != 0) ||
1170 (serial->rx_state == RX_PENDING))) {
1171 serial->rx_state = RX_SENT;
1172 hso_mux_serial_read(serial);
1173 } else
1174 serial->rx_state = RX_IDLE;
1175}
1176
1177
1178/* read callback for Diag and CS port */
1179static void hso_std_serial_read_bulk_callback(struct urb *urb)
1180{
1181 struct hso_serial *serial = urb->context;
1182 int status = urb->status;
12c4de4b 1183 unsigned long flags;
8ef5ba63 1184
95a69117 1185 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
4ccd0bb9 1186
8ef5ba63
DJB		 1187 /* sanity check */
1188 if (!serial) {
95a69117 1189 hso_dbg(0x1, "serial == NULL\n");
8ef5ba63 1190 return;
4ccd0bb9
DC		 1191 }
1192 if (status) {
68a351c5 1193 handle_usb_error(status, __func__, serial->parent);
8ef5ba63
DJB		 1194 return;
1195 }
1196
95a69117 1197 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
8ef5ba63
DJB		 1198 DUMP1(urb->transfer_buffer, urb->actual_length);
1199
1200 /* Anyone listening? */
5ce76e77 1201 if (serial->port.count == 0)
8ef5ba63
DJB		 1202 return;
1203
4ccd0bb9
DC		 1204 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1205 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1206 /* Valid data, handle RX data */
12c4de4b 1207 spin_lock_irqsave(&serial->serial_lock, flags);
4ccd0bb9
DC		 1208 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1209 put_rxbuf_data_and_resubmit_bulk_urb(serial);
12c4de4b 1210 spin_unlock_irqrestore(&serial->serial_lock, flags);
8ef5ba63
DJB		 1211}
1212
1213/*
1214 * This needs to be a tasklet otherwise we will
1215 * end up recursively calling this function.
1216 */
1d4a09da 1217static void hso_unthrottle_tasklet(unsigned long data)
8ef5ba63 1218{
1d4a09da 1219 struct hso_serial *serial = (struct hso_serial *)data;
8ef5ba63
DJB		 1220 unsigned long flags;
1221
1222 spin_lock_irqsave(&serial->serial_lock, flags);
1223 if ((serial->parent->port_spec & HSO_INTF_MUX))
1224 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1225 else
1226 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1227 spin_unlock_irqrestore(&serial->serial_lock, flags);
1228}
1229
1230static void hso_unthrottle(struct tty_struct *tty)
1231{
30409420 1232 struct hso_serial *serial = tty->driver_data;
8ef5ba63
DJB		 1233
1234 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1235}
1236
72dc1c09
GKH		 1237/* open the requested serial port */
1238static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1239{
1240 struct hso_serial *serial = get_serial_by_index(tty->index);
ab153d84 1241 int result;
72dc1c09
GKH		 1242
1243 /* sanity check */
1244 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
e136e303 1245 WARN_ON(1);
72dc1c09 1246 tty->driver_data = NULL;
95a69117 1247 hso_dbg(0x1, "Failed to open port\n");
72dc1c09
GKH		 1248 return -ENODEV;
1249 }
1250
ab153d84 1251 mutex_lock(&serial->parent->mutex);
ab153d84
DM		 1252 result = usb_autopm_get_interface(serial->parent->interface);
1253 if (result < 0)
72dc1c09
GKH		 1254 goto err_out;
1255
95a69117 1256 hso_dbg(0x1, "Opening %d\n", serial->minor);
72dc1c09
GKH		 1257
1258 /* setup */
1259 tty->driver_data = serial;
9f8c0b08 1260 tty_port_tty_set(&serial->port, tty);
72dc1c09 1261
2f9889a2 1262 /* check for port already opened, if not set the termios */
5ce76e77
JS		 1263 serial->port.count++;
1264 if (serial->port.count == 1) {
8ef5ba63 1265 serial->rx_state = RX_IDLE;
72dc1c09
GKH		 1266 /* Force default termio settings */
1267 _hso_serial_set_termios(tty, NULL);
8ef5ba63 1268 tasklet_init(&serial->unthrottle_tasklet,
1d4a09da 1269 hso_unthrottle_tasklet,
8ef5ba63 1270 (unsigned long)serial);
ab153d84
DM		 1271 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1272 if (result) {
72dc1c09 1273 hso_stop_serial_device(serial->parent);
5ce76e77 1274 serial->port.count--;
29bd3bc1
OS		 1275 } else {
1276 kref_get(&serial->parent->ref);
72dc1c09
GKH		 1277 }
1278 } else {
95a69117 1279 hso_dbg(0x1, "Port was already open\n");
72dc1c09
GKH		 1280 }
1281
1282 usb_autopm_put_interface(serial->parent->interface);
1283
1284 /* done */
ab153d84 1285 if (result)
20b9d177 1286 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
72dc1c09 1287err_out:
ab153d84
DM		 1288 mutex_unlock(&serial->parent->mutex);
1289 return result;
72dc1c09
GKH		 1290}
1291
1292/* close the requested serial port */
1293static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1294{
1295 struct hso_serial *serial = tty->driver_data;
1296 u8 usb_gone;
1297
95a69117 1298 hso_dbg(0x1, "Closing serial port\n");
72dc1c09 1299
e136e303
AC		 1300 /* Open failed, no close cleanup required */
1301 if (serial == NULL)
1302 return;
1303
ab153d84 1304 mutex_lock(&serial->parent->mutex);
72dc1c09
GKH		 1305 usb_gone = serial->parent->usb_gone;
1306
1307 if (!usb_gone)
1308 usb_autopm_get_interface(serial->parent->interface);
1309
1310 /* reset the rts and dtr */
1311 /* do the actual close */
5ce76e77 1312 serial->port.count--;
dcfcb256 1313
5ce76e77
JS		 1314 if (serial->port.count <= 0) {
1315 serial->port.count = 0;
9f8c0b08 1316 tty_port_tty_set(&serial->port, NULL);
72dc1c09
GKH		 1317 if (!usb_gone)
1318 hso_stop_serial_device(serial->parent);
8ef5ba63 1319 tasklet_kill(&serial->unthrottle_tasklet);
72dc1c09 1320 }
8ef5ba63 1321
72dc1c09
GKH		 1322 if (!usb_gone)
1323 usb_autopm_put_interface(serial->parent->interface);
ab153d84
DM		 1324
1325 mutex_unlock(&serial->parent->mutex);
72dc1c09
GKH		 1326}
1327
1328/* close the requested serial port */
1329static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1330 int count)
1331{
30409420 1332 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1333 int space, tx_bytes;
1334 unsigned long flags;
1335
1336 /* sanity check */
1337 if (serial == NULL) {
3981cce6 1338 pr_err("%s: serial is NULL\n", __func__);
72dc1c09
GKH		 1339 return -ENODEV;
1340 }
1341
1342 spin_lock_irqsave(&serial->serial_lock, flags);
1343
1344 space = serial->tx_data_length - serial->tx_buffer_count;
1345 tx_bytes = (count < space) ? count : space;
1346
1347 if (!tx_bytes)
1348 goto out;
1349
1350 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1351 serial->tx_buffer_count += tx_bytes;
1352
1353out:
1354 spin_unlock_irqrestore(&serial->serial_lock, flags);
1355
1356 hso_kick_transmit(serial);
1357 /* done */
1358 return tx_bytes;
1359}
1360
1361/* how much room is there for writing */
1362static int hso_serial_write_room(struct tty_struct *tty)
1363{
30409420 1364 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1365 int room;
1366 unsigned long flags;
1367
1368 spin_lock_irqsave(&serial->serial_lock, flags);
1369 room = serial->tx_data_length - serial->tx_buffer_count;
1370 spin_unlock_irqrestore(&serial->serial_lock, flags);
1371
1372 /* return free room */
1373 return room;
1374}
1375
29bd3bc1
OS		 1376static void hso_serial_cleanup(struct tty_struct *tty)
1377{
1378 struct hso_serial *serial = tty->driver_data;
1379
1380 if (!serial)
1381 return;
1382
1383 kref_put(&serial->parent->ref, hso_serial_ref_free);
1384}
1385
72dc1c09
GKH		 1386/* setup the term */
1387static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1388{
30409420 1389 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1390 unsigned long flags;
1391
1392 if (old)
95a69117
JP		 1393 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n",
1394 tty->termios.c_cflag, old->c_cflag);
72dc1c09
GKH		 1395
1396 /* the actual setup */
1397 spin_lock_irqsave(&serial->serial_lock, flags);
5ce76e77 1398 if (serial->port.count)
72dc1c09
GKH		 1399 _hso_serial_set_termios(tty, old);
1400 else
adc8d746 1401 tty->termios = *old;
72dc1c09
GKH		 1402 spin_unlock_irqrestore(&serial->serial_lock, flags);
1403
1404 /* done */
72dc1c09
GKH		 1405}
1406
1407/* how many characters in the buffer */
1408static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1409{
30409420 1410 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1411 int chars;
1412 unsigned long flags;
1413
1414 /* sanity check */
1415 if (serial == NULL)
1416 return 0;
1417
1418 spin_lock_irqsave(&serial->serial_lock, flags);
1419 chars = serial->tx_buffer_count;
1420 spin_unlock_irqrestore(&serial->serial_lock, flags);
1421
1422 return chars;
1423}
0227abc9
HE		 1424static int tiocmget_submit_urb(struct hso_serial *serial,
1425 struct hso_tiocmget *tiocmget,
1426 struct usb_device *usb)
542f5482
DJB		 1427{
1428 int result;
1429
1430 if (serial->parent->usb_gone)
1431 return -ENODEV;
1432 usb_fill_int_urb(tiocmget->urb, usb,
1433 usb_rcvintpipe(usb,
1434 tiocmget->endp->
1435 bEndpointAddress & 0x7F),
af0de130 1436 tiocmget->serial_state_notification,
542f5482
DJB		 1437 sizeof(struct hso_serial_state_notification),
1438 tiocmget_intr_callback, serial,
1439 tiocmget->endp->bInterval);
1440 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1441 if (result) {
1442 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1443 result);
1444 }
1445 return result;
1446
1447}
1448
1449static void tiocmget_intr_callback(struct urb *urb)
1450{
1451 struct hso_serial *serial = urb->context;
1452 struct hso_tiocmget *tiocmget;
1453 int status = urb->status;
1454 u16 UART_state_bitmap, prev_UART_state_bitmap;
1455 struct uart_icount *icount;
1456 struct hso_serial_state_notification *serial_state_notification;
1457 struct usb_device *usb;
64bea46e 1458 struct usb_interface *interface;
e5e97ee9 1459 int if_num;
542f5482
DJB		 1460
1461 /* Sanity checks */
1462 if (!serial)
1463 return;
1464 if (status) {
68a351c5 1465 handle_usb_error(status, __func__, serial->parent);
542f5482
DJB		 1466 return;
1467 }
e5e97ee9
DW		 1468
1469 /* tiocmget is only supported on HSO_PORT_MODEM */
542f5482
DJB		 1470 tiocmget = serial->tiocmget;
1471 if (!tiocmget)
1472 return;
e5e97ee9
DW		 1473 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1474
542f5482 1475 usb = serial->parent->usb;
64bea46e
AM		 1476 interface = serial->parent->interface;
1477
1478 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
e5e97ee9
DW		 1479
1480 /* wIndex should be the USB interface number of the port to which the
1481 * notification applies, which should always be the Modem port.
1482 */
af0de130 1483 serial_state_notification = tiocmget->serial_state_notification;
542f5482
DJB		 1484 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1485 serial_state_notification->bNotification != B_NOTIFICATION ||
1486 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
e5e97ee9 1487 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
542f5482
DJB		 1488 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1489 dev_warn(&usb->dev,
1490 "hso received invalid serial state notification\n");
1491 DUMP(serial_state_notification,
9ce673d5 1492 sizeof(struct hso_serial_state_notification));
542f5482 1493 } else {
12c4de4b 1494 unsigned long flags;
542f5482
DJB		 1495
1496 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1497 UART_state_bitmap);
1498 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1499 icount = &tiocmget->icount;
12c4de4b 1500 spin_lock_irqsave(&serial->serial_lock, flags);
542f5482
DJB		 1501 if ((UART_state_bitmap & B_OVERRUN) !=
1502 (prev_UART_state_bitmap & B_OVERRUN))
1503 icount->parity++;
1504 if ((UART_state_bitmap & B_PARITY) !=
1505 (prev_UART_state_bitmap & B_PARITY))
1506 icount->parity++;
1507 if ((UART_state_bitmap & B_FRAMING) !=
1508 (prev_UART_state_bitmap & B_FRAMING))
1509 icount->frame++;
1510 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1511 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1512 icount->rng++;
1513 if ((UART_state_bitmap & B_BREAK) !=
1514 (prev_UART_state_bitmap & B_BREAK))
1515 icount->brk++;
1516 if ((UART_state_bitmap & B_TX_CARRIER) !=
1517 (prev_UART_state_bitmap & B_TX_CARRIER))
1518 icount->dsr++;
1519 if ((UART_state_bitmap & B_RX_CARRIER) !=
1520 (prev_UART_state_bitmap & B_RX_CARRIER))
1521 icount->dcd++;
1522 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
12c4de4b 1523 spin_unlock_irqrestore(&serial->serial_lock, flags);
542f5482
DJB		 1524 tiocmget->intr_completed = 1;
1525 wake_up_interruptible(&tiocmget->waitq);
1526 }
1527 memset(serial_state_notification, 0,
1528 sizeof(struct hso_serial_state_notification));
1529 tiocmget_submit_urb(serial,
1530 tiocmget,
1531 serial->parent->usb);
1532}
1533
1534/*
1535 * next few functions largely stolen from drivers/serial/serial_core.c
1536 */
1537/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1538 * - mask passed in arg for lines of interest
1539 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1540 * Caller should use TIOCGICOUNT to see which one it was
1541 */
1542static int
1543hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1544{
1545 DECLARE_WAITQUEUE(wait, current);
1546 struct uart_icount cprev, cnow;
1547 struct hso_tiocmget *tiocmget;
1548 int ret;
1549
1550 tiocmget = serial->tiocmget;
1551 if (!tiocmget)
1552 return -ENOENT;
1553 /*
1554 * note the counters on entry
1555 */
1556 spin_lock_irq(&serial->serial_lock);
1557 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1558 spin_unlock_irq(&serial->serial_lock);
1559 add_wait_queue(&tiocmget->waitq, &wait);
1560 for (;;) {
1561 spin_lock_irq(&serial->serial_lock);
1562 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1563 spin_unlock_irq(&serial->serial_lock);
1564 set_current_state(TASK_INTERRUPTIBLE);
1565 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1566 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1567 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1568 ret = 0;
1569 break;
1570 }
1571 schedule();
1572 /* see if a signal did it */
1573 if (signal_pending(current)) {
1574 ret = -ERESTARTSYS;
1575 break;
1576 }
1577 cprev = cnow;
1578 }
50462ce0 1579 __set_current_state(TASK_RUNNING);
542f5482
DJB		 1580 remove_wait_queue(&tiocmget->waitq, &wait);
1581
1582 return ret;
1583}
1584
1585/*
1586 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1587 * Return: write counters to the user passed counter struct
1588 * NB: both 1->0 and 0->1 transitions are counted except for
1589 * RI where only 0->1 is counted.
1590 */
0bca1b91
AC		 1591static int hso_get_count(struct tty_struct *tty,
1592 struct serial_icounter_struct *icount)
542f5482 1593{
542f5482 1594 struct uart_icount cnow;
30409420 1595 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1596 struct hso_tiocmget *tiocmget = serial->tiocmget;
1597
22ad7499 1598 memset(icount, 0, sizeof(struct serial_icounter_struct));
7011e660 1599
542f5482
DJB		 1600 if (!tiocmget)
1601 return -ENOENT;
1602 spin_lock_irq(&serial->serial_lock);
1603 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1604 spin_unlock_irq(&serial->serial_lock);
1605
0bca1b91
AC		 1606 icount->cts = cnow.cts;
1607 icount->dsr = cnow.dsr;
1608 icount->rng = cnow.rng;
1609 icount->dcd = cnow.dcd;
1610 icount->rx = cnow.rx;
1611 icount->tx = cnow.tx;
1612 icount->frame = cnow.frame;
1613 icount->overrun = cnow.overrun;
1614 icount->parity = cnow.parity;
1615 icount->brk = cnow.brk;
1616 icount->buf_overrun = cnow.buf_overrun;
542f5482 1617
0bca1b91 1618 return 0;
542f5482
DJB		 1619}
1620
72dc1c09 1621
60b33c13 1622static int hso_serial_tiocmget(struct tty_struct *tty)
72dc1c09 1623{
542f5482 1624 int retval;
30409420 1625 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1626 struct hso_tiocmget *tiocmget;
1627 u16 UART_state_bitmap;
72dc1c09
GKH		 1628
1629 /* sanity check */
1630 if (!serial) {
95a69117 1631 hso_dbg(0x1, "no tty structures\n");
72dc1c09
GKH		 1632 return -EINVAL;
1633 }
542f5482
DJB		 1634 spin_lock_irq(&serial->serial_lock);
1635 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
72dc1c09 1636 ((serial->dtr_state) ? TIOCM_DTR : 0);
542f5482
DJB		 1637 tiocmget = serial->tiocmget;
1638 if (tiocmget) {
1639
1640 UART_state_bitmap = le16_to_cpu(
1641 tiocmget->prev_UART_state_bitmap);
1642 if (UART_state_bitmap & B_RING_SIGNAL)
1643 retval |= TIOCM_RNG;
1644 if (UART_state_bitmap & B_RX_CARRIER)
1645 retval |= TIOCM_CD;
1646 if (UART_state_bitmap & B_TX_CARRIER)
1647 retval |= TIOCM_DSR;
1648 }
1649 spin_unlock_irq(&serial->serial_lock);
1650 return retval;
72dc1c09
GKH		 1651}
1652
20b9d177 1653static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 1654 unsigned int set, unsigned int clear)
1655{
1656 int val = 0;
1657 unsigned long flags;
1658 int if_num;
30409420 1659 struct hso_serial *serial = tty->driver_data;
64bea46e 1660 struct usb_interface *interface;
72dc1c09
GKH		 1661
1662 /* sanity check */
1663 if (!serial) {
95a69117 1664 hso_dbg(0x1, "no tty structures\n");
72dc1c09
GKH		 1665 return -EINVAL;
1666 }
0e0367e9
JD		 1667
1668 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1669 return -EINVAL;
1670
64bea46e
AM		 1671 interface = serial->parent->interface;
1672 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
72dc1c09
GKH		 1673
1674 spin_lock_irqsave(&serial->serial_lock, flags);
1675 if (set & TIOCM_RTS)
1676 serial->rts_state = 1;
1677 if (set & TIOCM_DTR)
1678 serial->dtr_state = 1;
1679
1680 if (clear & TIOCM_RTS)
1681 serial->rts_state = 0;
1682 if (clear & TIOCM_DTR)
1683 serial->dtr_state = 0;
1684
1685 if (serial->dtr_state)
1686 val |= 0x01;
1687 if (serial->rts_state)
1688 val |= 0x02;
1689
1690 spin_unlock_irqrestore(&serial->serial_lock, flags);
1691
1692 return usb_control_msg(serial->parent->usb,
1693 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1694 0x21, val, if_num, NULL, 0,
1695 USB_CTRL_SET_TIMEOUT);
1696}
1697
6caa76b7 1698static int hso_serial_ioctl(struct tty_struct *tty,
542f5482
DJB		 1699 unsigned int cmd, unsigned long arg)
1700{
30409420 1701 struct hso_serial *serial = tty->driver_data;
542f5482 1702 int ret = 0;
95a69117 1703 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
542f5482
DJB		 1704
1705 if (!serial)
1706 return -ENODEV;
1707 switch (cmd) {
1708 case TIOCMIWAIT:
1709 ret = hso_wait_modem_status(serial, arg);
1710 break;
542f5482
DJB		 1711 default:
1712 ret = -ENOIOCTLCMD;
1713 break;
1714 }
1715 return ret;
1716}
1717
1718
72dc1c09
GKH		 1719/* starts a transmit */
1720static void hso_kick_transmit(struct hso_serial *serial)
1721{
72dc1c09
GKH		 1722 unsigned long flags;
1723 int res;
1724
1725 spin_lock_irqsave(&serial->serial_lock, flags);
1726 if (!serial->tx_buffer_count)
1727 goto out;
1728
1729 if (serial->tx_urb_used)
1730 goto out;
1731
1732 /* Wakeup USB interface if necessary */
1733 if (hso_get_activity(serial->parent) == -EAGAIN)
1734 goto out;
1735
1736 /* Switch pointers around to avoid memcpy */
ae85467c 1737 swap(serial->tx_buffer, serial->tx_data);
72dc1c09
GKH		 1738 serial->tx_data_count = serial->tx_buffer_count;
1739 serial->tx_buffer_count = 0;
1740
ae85467c
GS		 1741 /* If serial->tx_data is set, it means we switched buffers */
1742 if (serial->tx_data && serial->write_data) {
72dc1c09
GKH		 1743 res = serial->write_data(serial);
1744 if (res >= 0)
1745 serial->tx_urb_used = 1;
1746 }
1747out:
1748 spin_unlock_irqrestore(&serial->serial_lock, flags);
1749}
1750
1751/* make a request (for reading and writing data to muxed serial port) */
1752static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1753 struct urb *ctrl_urb,
1754 struct usb_ctrlrequest *ctrl_req,
1755 u8 *ctrl_urb_data, u32 size)
1756{
1757 int result;
1758 int pipe;
1759
1760 /* Sanity check */
1761 if (!serial || !ctrl_urb || !ctrl_req) {
3981cce6 1762 pr_err("%s: Wrong arguments\n", __func__);
72dc1c09
GKH		 1763 return -EINVAL;
1764 }
1765
1766 /* initialize */
1767 ctrl_req->wValue = 0;
b74f62c1
DJB		 1768 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1769 ctrl_req->wLength = cpu_to_le16(size);
72dc1c09
GKH		 1770
1771 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1772 /* Reading command */
1773 ctrl_req->bRequestType = USB_DIR_IN |
1774 USB_TYPE_OPTION_VENDOR |
1775 USB_RECIP_INTERFACE;
1776 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1777 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1778 } else {
1779 /* Writing command */
1780 ctrl_req->bRequestType = USB_DIR_OUT |
1781 USB_TYPE_OPTION_VENDOR |
1782 USB_RECIP_INTERFACE;
1783 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1784 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1785 }
1786 /* syslog */
95a69117
JP		 1787 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1788 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1789 ctrl_req->bRequestType, ctrl_req->wLength, port);
72dc1c09
GKH		 1790
1791 /* Load ctrl urb */
1792 ctrl_urb->transfer_flags = 0;
1793 usb_fill_control_urb(ctrl_urb,
1794 serial->parent->usb,
1795 pipe,
1796 (u8 *) ctrl_req,
1797 ctrl_urb_data, size, ctrl_callback, serial);
1798 /* Send it on merry way */
1799 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1800 if (result) {
1801 dev_err(&ctrl_urb->dev->dev,
8a5c9c49 1802 "%s failed submit ctrl_urb %d type %d\n", __func__,
72dc1c09
GKH		 1803 result, type);
1804 return result;
1805 }
1806
1807 /* done */
1808 return size;
1809}
1810
1811/* called by intr_callback when read occurs */
1812static int hso_mux_serial_read(struct hso_serial *serial)
1813{
1814 if (!serial)
1815 return -EINVAL;
1816
1817 /* clean data */
1818 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1819 /* make the request */
1820
1821 if (serial->num_rx_urbs != 1) {
1822 dev_err(&serial->parent->interface->dev,
1823 "ERROR: mux'd reads with multiple buffers "
1824 "not possible\n");
1825 return 0;
1826 }
1827 return mux_device_request(serial,
1828 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1829 serial->parent->port_spec & HSO_PORT_MASK,
1830 serial->rx_urb[0],
1831 &serial->ctrl_req_rx,
1832 serial->rx_data[0], serial->rx_data_length);
1833}
1834
1835/* used for muxed serial port callback (muxed serial read) */
1836static void intr_callback(struct urb *urb)
1837{
1838 struct hso_shared_int *shared_int = urb->context;
1839 struct hso_serial *serial;
1840 unsigned char *port_req;
1841 int status = urb->status;
12c4de4b 1842 unsigned long flags;
72dc1c09
GKH		 1843 int i;
1844
1845 usb_mark_last_busy(urb->dev);
1846
1847 /* sanity check */
1848 if (!shared_int)
1849 return;
1850
1851 /* status check */
1852 if (status) {
68a351c5 1853 handle_usb_error(status, __func__, NULL);
72dc1c09
GKH		 1854 return;
1855 }
95a69117 1856 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
72dc1c09
GKH		 1857
1858 /* what request? */
1859 port_req = urb->transfer_buffer;
95a69117 1860 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
72dc1c09
GKH		 1861 /* loop over all muxed ports to find the one sending this */
1862 for (i = 0; i < 8; i++) {
1863 /* max 8 channels on MUX */
1864 if (*port_req & (1 << i)) {
1865 serial = get_serial_by_shared_int_and_type(shared_int,
1866 (1 << i));
1867 if (serial != NULL) {
95a69117
JP		 1868 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1869 i);
12c4de4b 1870 spin_lock_irqsave(&serial->serial_lock, flags);
f4763e96 1871 if (serial->rx_state == RX_IDLE &&
5ce76e77 1872 serial->port.count > 0) {
72dc1c09
GKH		 1873 /* Setup and send a ctrl req read on
1874 * port i */
f4763e96 1875 if (!serial->rx_urb_filled[0]) {
8ef5ba63
DJB		 1876 serial->rx_state = RX_SENT;
1877 hso_mux_serial_read(serial);
1878 } else
1879 serial->rx_state = RX_PENDING;
72dc1c09 1880 } else {
95a69117
JP		 1881 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1882 i);
72dc1c09 1883 }
12c4de4b
SAS		 1884 spin_unlock_irqrestore(&serial->serial_lock,
1885 flags);
72dc1c09
GKH		 1886 }
1887 }
1888 }
1889 /* Resubmit interrupt urb */
1890 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1891}
1892
1893/* called for writing to muxed serial port */
1894static int hso_mux_serial_write_data(struct hso_serial *serial)
1895{
1896 if (NULL == serial)
1897 return -EINVAL;
1898
1899 return mux_device_request(serial,
1900 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1901 serial->parent->port_spec & HSO_PORT_MASK,
1902 serial->tx_urb,
1903 &serial->ctrl_req_tx,
1904 serial->tx_data, serial->tx_data_count);
1905}
1906
1907/* write callback for Diag and CS port */
1908static void hso_std_serial_write_bulk_callback(struct urb *urb)
1909{
1910 struct hso_serial *serial = urb->context;
1911 int status = urb->status;
12c4de4b 1912 unsigned long flags;
72dc1c09
GKH		 1913
1914 /* sanity check */
1915 if (!serial) {
95a69117 1916 hso_dbg(0x1, "serial == NULL\n");
72dc1c09
GKH		 1917 return;
1918 }
1919
12c4de4b 1920 spin_lock_irqsave(&serial->serial_lock, flags);
72dc1c09 1921 serial->tx_urb_used = 0;
12c4de4b 1922 spin_unlock_irqrestore(&serial->serial_lock, flags);
72dc1c09 1923 if (status) {
68a351c5 1924 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1925 return;
1926 }
1927 hso_put_activity(serial->parent);
6aad04f2 1928 tty_port_tty_wakeup(&serial->port);
72dc1c09
GKH		 1929 hso_kick_transmit(serial);
1930
95a69117 1931 hso_dbg(0x1, "\n");
72dc1c09
GKH		 1932}
1933
1934/* called for writing diag or CS serial port */
1935static int hso_std_serial_write_data(struct hso_serial *serial)
1936{
1937 int count = serial->tx_data_count;
1938 int result;
1939
1940 usb_fill_bulk_urb(serial->tx_urb,
1941 serial->parent->usb,
1942 usb_sndbulkpipe(serial->parent->usb,
1943 serial->out_endp->
1944 bEndpointAddress & 0x7F),
1945 serial->tx_data, serial->tx_data_count,
1946 hso_std_serial_write_bulk_callback, serial);
1947
1948 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1949 if (result) {
1950 dev_warn(&serial->parent->usb->dev,
1951 "Failed to submit urb - res %d\n", result);
1952 return result;
1953 }
1954
1955 return count;
1956}
1957
1958/* callback after read or write on muxed serial port */
1959static void ctrl_callback(struct urb *urb)
1960{
1961 struct hso_serial *serial = urb->context;
1962 struct usb_ctrlrequest *req;
1963 int status = urb->status;
12c4de4b 1964 unsigned long flags;
72dc1c09
GKH		 1965
1966 /* sanity check */
1967 if (!serial)
1968 return;
1969
12c4de4b 1970 spin_lock_irqsave(&serial->serial_lock, flags);
72dc1c09 1971 serial->tx_urb_used = 0;
12c4de4b 1972 spin_unlock_irqrestore(&serial->serial_lock, flags);
72dc1c09 1973 if (status) {
68a351c5 1974 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1975 return;
1976 }
1977
1978 /* what request? */
1979 req = (struct usb_ctrlrequest *)(urb->setup_packet);
95a69117
JP		 1980 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1981 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
72dc1c09
GKH		 1982 DUMP1(urb->transfer_buffer, urb->actual_length);
1983
1984 if (req->bRequestType ==
1985 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1986 /* response to a read command */
8ef5ba63 1987 serial->rx_urb_filled[0] = 1;
12c4de4b 1988 spin_lock_irqsave(&serial->serial_lock, flags);
8ef5ba63 1989 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
12c4de4b 1990 spin_unlock_irqrestore(&serial->serial_lock, flags);
72dc1c09
GKH		 1991 } else {
1992 hso_put_activity(serial->parent);
6aad04f2 1993 tty_port_tty_wakeup(&serial->port);
72dc1c09
GKH		 1994 /* response to a write command */
1995 hso_kick_transmit(serial);
1996 }
1997}
1998
1999/* handle RX data for serial port */
8ef5ba63 2000static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
72dc1c09 2001{
e136e303 2002 struct tty_struct *tty;
8f9818af 2003 int count;
e136e303 2004
72dc1c09
GKH		 2005 /* Sanity check */
2006 if (urb == NULL || serial == NULL) {
95a69117 2007 hso_dbg(0x1, "serial = NULL\n");
8ef5ba63 2008 return -2;
72dc1c09
GKH		 2009 }
2010
9f8c0b08 2011 tty = tty_port_tty_get(&serial->port);
e136e303 2012
97ef38b8 2013 if (tty && tty_throttled(tty)) {
8f9818af
OS		 2014 tty_kref_put(tty);
2015 return -1;
2016 }
2017
72dc1c09 2018 /* Push data to tty */
95a69117 2019 hso_dbg(0x1, "data to push to tty\n");
8f9818af
OS		 2020 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2021 if (count >= urb->actual_length) {
2022 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2023 urb->actual_length);
2e124b4a 2024 tty_flip_buffer_push(&serial->port);
8f9818af
OS		 2025 } else {
2026 dev_warn(&serial->parent->usb->dev,
2027 "dropping data, %d bytes lost\n", urb->actual_length);
72dc1c09 2028 }
8f9818af 2029
2e124b4a
JS		 2030 tty_kref_put(tty);
2031
8f9818af
OS		 2032 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2033
2034 return 0;
72dc1c09
GKH		 2035}
2036
8ef5ba63 2037
72dc1c09
GKH		 2038/* Base driver functions */
2039
2040static void hso_log_port(struct hso_device *hso_dev)
2041{
2042 char *port_type;
2043 char port_dev[20];
2044
2045 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2046 case HSO_PORT_CONTROL:
2047 port_type = "Control";
2048 break;
2049 case HSO_PORT_APP:
2050 port_type = "Application";
2051 break;
2052 case HSO_PORT_GPS:
2053 port_type = "GPS";
2054 break;
2055 case HSO_PORT_GPS_CONTROL:
2056 port_type = "GPS control";
2057 break;
2058 case HSO_PORT_APP2:
2059 port_type = "Application2";
2060 break;
2061 case HSO_PORT_PCSC:
2062 port_type = "PCSC";
2063 break;
2064 case HSO_PORT_DIAG:
2065 port_type = "Diagnostic";
2066 break;
2067 case HSO_PORT_DIAG2:
2068 port_type = "Diagnostic2";
2069 break;
2070 case HSO_PORT_MODEM:
2071 port_type = "Modem";
2072 break;
2073 case HSO_PORT_NETWORK:
2074 port_type = "Network";
2075 break;
2076 default:
2077 port_type = "Unknown";
2078 break;
2079 }
2080 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2081 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2082 } else
2083 sprintf(port_dev, "/dev/%s%d", tty_filename,
2084 dev2ser(hso_dev)->minor);
2085
2086 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2087 port_type, port_dev);
2088}
2089
2090static int hso_start_net_device(struct hso_device *hso_dev)
2091{
2092 int i, result = 0;
2093 struct hso_net *hso_net = dev2net(hso_dev);
2094
2095 if (!hso_net)
2096 return -ENODEV;
2097
2098 /* send URBs for all read buffers */
2099 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2100
2101 /* Prep a receive URB */
2102 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2103 hso_dev->usb,
2104 usb_rcvbulkpipe(hso_dev->usb,
2105 hso_net->in_endp->
2106 bEndpointAddress & 0x7F),
2107 hso_net->mux_bulk_rx_buf_pool[i],
2108 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2109 hso_net);
2110
2111 /* Put it out there so the device can send us stuff */
2112 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2113 GFP_NOIO);
2114 if (result)
2115 dev_warn(&hso_dev->usb->dev,
2116 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2117 i, result);
2118 }
2119
2120 return result;
2121}
2122
2123static int hso_stop_net_device(struct hso_device *hso_dev)
2124{
2125 int i;
2126 struct hso_net *hso_net = dev2net(hso_dev);
2127
2128 if (!hso_net)
2129 return -ENODEV;
2130
2131 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2132 if (hso_net->mux_bulk_rx_urb_pool[i])
2133 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2134
2135 }
2136 if (hso_net->mux_bulk_tx_urb)
2137 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2138
2139 return 0;
2140}
2141
2142static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2143{
2144 int i, result = 0;
2145 struct hso_serial *serial = dev2ser(hso_dev);
2146
2147 if (!serial)
2148 return -ENODEV;
2149
2150 /* If it is not the MUX port fill in and submit a bulk urb (already
2151 * allocated in hso_serial_start) */
2152 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2153 for (i = 0; i < serial->num_rx_urbs; i++) {
2154 usb_fill_bulk_urb(serial->rx_urb[i],
2155 serial->parent->usb,
2156 usb_rcvbulkpipe(serial->parent->usb,
2157 serial->in_endp->
2158 bEndpointAddress &
2159 0x7F),
2160 serial->rx_data[i],
2161 serial->rx_data_length,
2162 hso_std_serial_read_bulk_callback,
2163 serial);
2164 result = usb_submit_urb(serial->rx_urb[i], flags);
2165 if (result) {
2166 dev_warn(&serial->parent->usb->dev,
2167 "Failed to submit urb - res %d\n",
2168 result);
2169 break;
2170 }
2171 }
2172 } else {
2173 mutex_lock(&serial->shared_int->shared_int_lock);
2174 if (!serial->shared_int->use_count) {
2175 result =
2176 hso_mux_submit_intr_urb(serial->shared_int,
2177 hso_dev->usb, flags);
2178 }
2179 serial->shared_int->use_count++;
2180 mutex_unlock(&serial->shared_int->shared_int_lock);
2181 }
542f5482
DJB		 2182 if (serial->tiocmget)
2183 tiocmget_submit_urb(serial,
2184 serial->tiocmget,
2185 serial->parent->usb);
72dc1c09
GKH		 2186 return result;
2187}
2188
2189static int hso_stop_serial_device(struct hso_device *hso_dev)
2190{
2191 int i;
2192 struct hso_serial *serial = dev2ser(hso_dev);
542f5482 2193 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2194
2195 if (!serial)
2196 return -ENODEV;
2197
2198 for (i = 0; i < serial->num_rx_urbs; i++) {
8ef5ba63 2199 if (serial->rx_urb[i]) {
79927679
OS		 2200 usb_kill_urb(serial->rx_urb[i]);
2201 serial->rx_urb_filled[i] = 0;
8ef5ba63 2202 }
72dc1c09 2203 }
8ef5ba63 2204 serial->curr_rx_urb_idx = 0;
72dc1c09
GKH		 2205
2206 if (serial->tx_urb)
2207 usb_kill_urb(serial->tx_urb);
2208
2209 if (serial->shared_int) {
2210 mutex_lock(&serial->shared_int->shared_int_lock);
2211 if (serial->shared_int->use_count &&
2212 (--serial->shared_int->use_count == 0)) {
2213 struct urb *urb;
2214
2215 urb = serial->shared_int->shared_intr_urb;
2216 if (urb)
2217 usb_kill_urb(urb);
2218 }
2219 mutex_unlock(&serial->shared_int->shared_int_lock);
2220 }
542f5482
DJB		 2221 tiocmget = serial->tiocmget;
2222 if (tiocmget) {
2223 wake_up_interruptible(&tiocmget->waitq);
2224 usb_kill_urb(tiocmget->urb);
2225 }
72dc1c09
GKH		 2226
2227 return 0;
2228}
2229
69b377b3 2230static void hso_serial_tty_unregister(struct hso_serial *serial)
72dc1c09 2231{
72dc1c09 2232 tty_unregister_device(tty_drv, serial->minor);
69b377b3
OS		 2233}
2234
2235static void hso_serial_common_free(struct hso_serial *serial)
2236{
2237 int i;
72dc1c09
GKH		 2238
2239 for (i = 0; i < serial->num_rx_urbs; i++) {
2240 /* unlink and free RX URB */
2241 usb_free_urb(serial->rx_urb[i]);
2242 /* free the RX buffer */
2243 kfree(serial->rx_data[i]);
2244 }
2245
2246 /* unlink and free TX URB */
2247 usb_free_urb(serial->tx_urb);
295fc56f 2248 kfree(serial->tx_buffer);
72dc1c09 2249 kfree(serial->tx_data);
191c5f10 2250 tty_port_destroy(&serial->port);
72dc1c09
GKH		 2251}
2252
2253static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2254 int rx_size, int tx_size)
2255{
72dc1c09
GKH		 2256 int minor;
2257 int i;
2258
191c5f10
JS		 2259 tty_port_init(&serial->port);
2260
72dc1c09
GKH		 2261 minor = get_free_serial_index();
2262 if (minor < 0)
2263 goto exit;
2264
2265 /* register our minor number */
4134069f
TI		 2266 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2267 tty_drv, minor, &serial->parent->interface->dev,
2268 serial->parent, hso_serial_dev_groups);
72dc1c09
GKH		 2269
2270 /* fill in specific data for later use */
2271 serial->minor = minor;
2272 serial->magic = HSO_SERIAL_MAGIC;
2273 spin_lock_init(&serial->serial_lock);
2274 serial->num_rx_urbs = num_urbs;
2275
2276 /* RX, allocate urb and initialize */
2277
2278 /* prepare our RX buffer */
2279 serial->rx_data_length = rx_size;
2280 for (i = 0; i < serial->num_rx_urbs; i++) {
2281 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
12800ea9 2282 if (!serial->rx_urb[i])
72dc1c09 2283 goto exit;
72dc1c09
GKH		 2284 serial->rx_urb[i]->transfer_buffer = NULL;
2285 serial->rx_urb[i]->transfer_buffer_length = 0;
2286 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2287 GFP_KERNEL);
38673c82 2288 if (!serial->rx_data[i])
72dc1c09 2289 goto exit;
72dc1c09
GKH		 2290 }
2291
2292 /* TX, allocate urb and initialize */
2293 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
12800ea9 2294 if (!serial->tx_urb)
72dc1c09 2295 goto exit;
72dc1c09
GKH		 2296 serial->tx_urb->transfer_buffer = NULL;
2297 serial->tx_urb->transfer_buffer_length = 0;
2298 /* prepare our TX buffer */
2299 serial->tx_data_count = 0;
2300 serial->tx_buffer_count = 0;
2301 serial->tx_data_length = tx_size;
2302 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2303 if (!serial->tx_data)
72dc1c09 2304 goto exit;
38673c82 2305
72dc1c09 2306 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2307 if (!serial->tx_buffer)
72dc1c09 2308 goto exit;
72dc1c09
GKH		 2309
2310 return 0;
2311exit:
69b377b3 2312 hso_serial_tty_unregister(serial);
72dc1c09
GKH		 2313 hso_serial_common_free(serial);
2314 return -1;
2315}
2316
72dc1c09
GKH		 2317/* Creates a general hso device */
2318static struct hso_device *hso_create_device(struct usb_interface *intf,
2319 int port_spec)
2320{
2321 struct hso_device *hso_dev;
2322
2323 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2324 if (!hso_dev)
2325 return NULL;
2326
2327 hso_dev->port_spec = port_spec;
2328 hso_dev->usb = interface_to_usbdev(intf);
2329 hso_dev->interface = intf;
2330 kref_init(&hso_dev->ref);
ab153d84
DM		 2331 mutex_init(&hso_dev->mutex);
2332
72dc1c09
GKH		 2333 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2334 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2335
2336 return hso_dev;
2337}
2338
2339/* Removes a network device in the network device table */
2340static int remove_net_device(struct hso_device *hso_dev)
2341{
2342 int i;
2343
2344 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2345 if (network_table[i] == hso_dev) {
2346 network_table[i] = NULL;
2347 break;
2348 }
2349 }
2350 if (i == HSO_MAX_NET_DEVICES)
2351 return -1;
2352 return 0;
2353}
2354
2355/* Frees our network device */
2356static void hso_free_net_device(struct hso_device *hso_dev)
2357{
2358 int i;
2359 struct hso_net *hso_net = dev2net(hso_dev);
2360
2361 if (!hso_net)
2362 return;
2363
3b7d2b31
JD		 2364 remove_net_device(hso_net->parent);
2365
5e2cd082 2366 if (hso_net->net)
3b7d2b31 2367 unregister_netdev(hso_net->net);
3b7d2b31 2368
72dc1c09
GKH		 2369 /* start freeing */
2370 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2371 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2372 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
3b7d2b31 2373 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
72dc1c09
GKH		 2374 }
2375 usb_free_urb(hso_net->mux_bulk_tx_urb);
2376 kfree(hso_net->mux_bulk_tx_buf);
3b7d2b31 2377 hso_net->mux_bulk_tx_buf = NULL;
ab153d84 2378
5e2cd082
GKH		 2379 if (hso_net->net)
2380 free_netdev(hso_net->net);
2381
e44578ea 2382 kfree(hso_dev);
72dc1c09
GKH		 2383}
2384
c266cb4e
SH		 2385static const struct net_device_ops hso_netdev_ops = {
2386 .ndo_open = hso_net_open,
2387 .ndo_stop = hso_net_close,
2388 .ndo_start_xmit = hso_net_start_xmit,
2389 .ndo_tx_timeout = hso_net_tx_timeout,
2390};
2391
72dc1c09
GKH		 2392/* initialize the network interface */
2393static void hso_net_init(struct net_device *net)
2394{
2395 struct hso_net *hso_net = netdev_priv(net);
2396
95a69117 2397 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
72dc1c09
GKH		 2398
2399 /* fill in the other fields */
c266cb4e 2400 net->netdev_ops = &hso_netdev_ops;
72dc1c09
GKH		 2401 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2402 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2403 net->type = ARPHRD_NONE;
2404 net->mtu = DEFAULT_MTU - 14;
2405 net->tx_queue_len = 10;
7ad24ea4 2406 net->ethtool_ops = &ops;
72dc1c09
GKH		 2407
2408 /* and initialize the semaphore */
2409 spin_lock_init(&hso_net->net_lock);
2410}
2411
2412/* Adds a network device in the network device table */
2413static int add_net_device(struct hso_device *hso_dev)
2414{
2415 int i;
2416
2417 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2418 if (network_table[i] == NULL) {
2419 network_table[i] = hso_dev;
2420 break;
2421 }
2422 }
2423 if (i == HSO_MAX_NET_DEVICES)
2424 return -1;
2425 return 0;
2426}
2427
19d337df 2428static int hso_rfkill_set_block(void *data, bool blocked)
72dc1c09
GKH		 2429{
2430 struct hso_device *hso_dev = data;
19d337df 2431 int enabled = !blocked;
72dc1c09
GKH		 2432 int rv;
2433
ab153d84 2434 mutex_lock(&hso_dev->mutex);
72dc1c09
GKH		 2435 if (hso_dev->usb_gone)
2436 rv = 0;
2437 else
2438 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2439 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2440 USB_CTRL_SET_TIMEOUT);
ab153d84 2441 mutex_unlock(&hso_dev->mutex);
72dc1c09
GKH		 2442 return rv;
2443}
2444
19d337df
JB		 2445static const struct rfkill_ops hso_rfkill_ops = {
2446 .set_block = hso_rfkill_set_block,
2447};
2448
72dc1c09
GKH		 2449/* Creates and sets up everything for rfkill */
2450static void hso_create_rfkill(struct hso_device *hso_dev,
2451 struct usb_interface *interface)
2452{
2453 struct hso_net *hso_net = dev2net(hso_dev);
939a9516 2454 struct device *dev = &hso_net->net->dev;
38121067 2455 static u32 rfkill_counter;
72dc1c09 2456
2e6d01ff 2457 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
38121067 2458 rfkill_counter++);
19d337df 2459
2e6d01ff 2460 hso_net->rfkill = rfkill_alloc(hso_net->name,
19d337df
JB		 2461 &interface_to_usbdev(interface)->dev,
2462 RFKILL_TYPE_WWAN,
2463 &hso_rfkill_ops, hso_dev);
2464 if (!hso_net->rfkill) {
2465 dev_err(dev, "%s - Out of memory\n", __func__);
19d337df
JB		 2466 return;
2467 }
72dc1c09 2468 if (rfkill_register(hso_net->rfkill) < 0) {
19d337df 2469 rfkill_destroy(hso_net->rfkill);
939a9516
JM		 2470 hso_net->rfkill = NULL;
2471 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
72dc1c09
GKH		 2472 return;
2473 }
2474}
2475
384912ed
MH		 2476static struct device_type hso_type = {
2477 .name = "wwan",
2478};
2479
72dc1c09 2480/* Creates our network device */
0de8ca59
JD		 2481static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2482 int port_spec)
72dc1c09
GKH		 2483{
2484 int result, i;
2485 struct net_device *net;
2486 struct hso_net *hso_net;
2487 struct hso_device *hso_dev;
2488
0de8ca59 2489 hso_dev = hso_create_device(interface, port_spec);
72dc1c09
GKH		 2490 if (!hso_dev)
2491 return NULL;
2492
2493 /* allocate our network device, then we can put in our private data */
2494 /* call hso_net_init to do the basic initialization */
c835a677
TG		 2495 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2496 hso_net_init);
72dc1c09
GKH		 2497 if (!net) {
2498 dev_err(&interface->dev, "Unable to create ethernet device\n");
2499 goto exit;
2500 }
2501
2502 hso_net = netdev_priv(net);
2503
2504 hso_dev->port_data.dev_net = hso_net;
2505 hso_net->net = net;
2506 hso_net->parent = hso_dev;
2507
2508 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2509 USB_DIR_IN);
2510 if (!hso_net->in_endp) {
2511 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2512 goto exit;
2513 }
2514 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2515 USB_DIR_OUT);
2516 if (!hso_net->out_endp) {
2517 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2518 goto exit;
2519 }
2520 SET_NETDEV_DEV(net, &interface->dev);
384912ed 2521 SET_NETDEV_DEVTYPE(net, &hso_type);
72dc1c09 2522
72dc1c09
GKH		 2523 /* start allocating */
2524 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2525 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
12800ea9 2526 if (!hso_net->mux_bulk_rx_urb_pool[i])
72dc1c09 2527 goto exit;
72dc1c09
GKH		 2528 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2529 GFP_KERNEL);
38673c82 2530 if (!hso_net->mux_bulk_rx_buf_pool[i])
72dc1c09 2531 goto exit;
72dc1c09
GKH		 2532 }
2533 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
12800ea9 2534 if (!hso_net->mux_bulk_tx_urb)
72dc1c09 2535 goto exit;
72dc1c09 2536 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
38673c82 2537 if (!hso_net->mux_bulk_tx_buf)
72dc1c09 2538 goto exit;
72dc1c09
GKH		 2539
2540 add_net_device(hso_dev);
2541
4c761daf
AK		 2542 /* registering our net device */
2543 result = register_netdev(net);
2544 if (result) {
2545 dev_err(&interface->dev, "Failed to register device\n");
2546 goto exit;
2547 }
2548
72dc1c09
GKH		 2549 hso_log_port(hso_dev);
2550
2551 hso_create_rfkill(hso_dev, interface);
2552
2553 return hso_dev;
2554exit:
2555 hso_free_net_device(hso_dev);
2556 return NULL;
2557}
2558
542f5482
DJB		 2559static void hso_free_tiomget(struct hso_serial *serial)
2560{
5b89db0e
JJ		 2561 struct hso_tiocmget *tiocmget;
2562 if (!serial)
2563 return;
2564 tiocmget = serial->tiocmget;
542f5482 2565 if (tiocmget) {
5b89db0e
JJ		 2566 usb_free_urb(tiocmget->urb);
2567 tiocmget->urb = NULL;
542f5482 2568 serial->tiocmget = NULL;
af0de130
ON		 2569 kfree(tiocmget->serial_state_notification);
2570 tiocmget->serial_state_notification = NULL;
3b7d2b31 2571 kfree(tiocmget);
542f5482
DJB		 2572 }
2573}
2574
72dc1c09
GKH		 2575/* Frees an AT channel ( goes for both mux and non-mux ) */
2576static void hso_free_serial_device(struct hso_device *hso_dev)
2577{
2578 struct hso_serial *serial = dev2ser(hso_dev);
2579
2580 if (!serial)
2581 return;
72dc1c09
GKH		 2582
2583 hso_serial_common_free(serial);
2584
2585 if (serial->shared_int) {
2586 mutex_lock(&serial->shared_int->shared_int_lock);
2587 if (--serial->shared_int->ref_count == 0)
2588 hso_free_shared_int(serial->shared_int);
2589 else
2590 mutex_unlock(&serial->shared_int->shared_int_lock);
2591 }
542f5482 2592 hso_free_tiomget(serial);
72dc1c09 2593 kfree(serial);
e44578ea 2594 kfree(hso_dev);
72dc1c09
GKH		 2595}
2596
2597/* Creates a bulk AT channel */
2598static struct hso_device *hso_create_bulk_serial_device(
2599 struct usb_interface *interface, int port)
2600{
2601 struct hso_device *hso_dev;
2602 struct hso_serial *serial;
2603 int num_urbs;
542f5482 2604 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2605
2606 hso_dev = hso_create_device(interface, port);
2607 if (!hso_dev)
2608 return NULL;
2609
2610 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2611 if (!serial)
2612 goto exit;
2613
2614 serial->parent = hso_dev;
2615 hso_dev->port_data.dev_serial = serial;
2616
58eb17f1 2617 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
72dc1c09 2618 num_urbs = 2;
542f5482
DJB		 2619 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2620 GFP_KERNEL);
af0de130
ON		 2621 serial->tiocmget->serial_state_notification
2622 = kzalloc(sizeof(struct hso_serial_state_notification),
2623 GFP_KERNEL);
542f5482
DJB		 2624 /* it isn't going to break our heart if serial->tiocmget
2625 * allocation fails don't bother checking this.
2626 */
af0de130 2627 if (serial->tiocmget && serial->tiocmget->serial_state_notification) {
542f5482 2628 tiocmget = serial->tiocmget;
8353da9f
JH		 2629 tiocmget->endp = hso_get_ep(interface,
2630 USB_ENDPOINT_XFER_INT,
2631 USB_DIR_IN);
2632 if (!tiocmget->endp) {
2633 dev_err(&interface->dev, "Failed to find INT IN ep\n");
2634 goto exit;
2635 }
2636
542f5482
DJB		 2637 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2638 if (tiocmget->urb) {
2639 mutex_init(&tiocmget->mutex);
2640 init_waitqueue_head(&tiocmget->waitq);
542f5482
DJB		 2641 } else
2642 hso_free_tiomget(serial);
2643 }
2644 }
72dc1c09
GKH		 2645 else
2646 num_urbs = 1;
2647
2648 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2649 BULK_URB_TX_SIZE))
2650 goto exit;
2651
2652 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2653 USB_DIR_IN);
2654 if (!serial->in_endp) {
2655 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2656 goto exit2;
72dc1c09
GKH		 2657 }
2658
2659 if (!
2660 (serial->out_endp =
2661 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
1a10186e 2662 dev_err(&interface->dev, "Failed to find BULK OUT ep\n");
e57b641d 2663 goto exit2;
72dc1c09
GKH		 2664 }
2665
2666 serial->write_data = hso_std_serial_write_data;
2667
2668 /* and record this serial */
2669 set_serial_by_index(serial->minor, serial);
2670
2671 /* setup the proc dirs and files if needed */
2672 hso_log_port(hso_dev);
2673
2674 /* done, return it */
2675 return hso_dev;
e57b641d
AB		 2676
2677exit2:
69b377b3 2678 hso_serial_tty_unregister(serial);
e57b641d 2679 hso_serial_common_free(serial);
72dc1c09 2680exit:
542f5482 2681 hso_free_tiomget(serial);
72dc1c09 2682 kfree(serial);
e44578ea 2683 kfree(hso_dev);
72dc1c09
GKH		 2684 return NULL;
2685}
2686
2687/* Creates a multiplexed AT channel */
2688static
2689struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2690 int port,
2691 struct hso_shared_int *mux)
2692{
2693 struct hso_device *hso_dev;
2694 struct hso_serial *serial;
2695 int port_spec;
2696
2697 port_spec = HSO_INTF_MUX;
2698 port_spec &= ~HSO_PORT_MASK;
2699
2700 port_spec |= hso_mux_to_port(port);
2701 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2702 return NULL;
2703
2704 hso_dev = hso_create_device(interface, port_spec);
2705 if (!hso_dev)
2706 return NULL;
2707
2708 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2709 if (!serial)
2710 goto exit;
2711
2712 hso_dev->port_data.dev_serial = serial;
2713 serial->parent = hso_dev;
2714
2715 if (hso_serial_common_create
2716 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2717 goto exit;
2718
2719 serial->tx_data_length--;
2720 serial->write_data = hso_mux_serial_write_data;
2721
2722 serial->shared_int = mux;
2723 mutex_lock(&serial->shared_int->shared_int_lock);
2724 serial->shared_int->ref_count++;
2725 mutex_unlock(&serial->shared_int->shared_int_lock);
2726
2727 /* and record this serial */
2728 set_serial_by_index(serial->minor, serial);
2729
2730 /* setup the proc dirs and files if needed */
2731 hso_log_port(hso_dev);
2732
2733 /* done, return it */
2734 return hso_dev;
2735
2736exit:
2737 if (serial) {
2738 tty_unregister_device(tty_drv, serial->minor);
2739 kfree(serial);
2740 }
91ecee68 2741 kfree(hso_dev);
72dc1c09
GKH		 2742 return NULL;
2743
2744}
2745
2746static void hso_free_shared_int(struct hso_shared_int *mux)
2747{
2748 usb_free_urb(mux->shared_intr_urb);
2749 kfree(mux->shared_intr_buf);
2750 mutex_unlock(&mux->shared_int_lock);
2751 kfree(mux);
2752}
2753
2754static
2755struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2756{
2757 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2758
2759 if (!mux)
2760 return NULL;
2761
2762 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2763 USB_DIR_IN);
2764 if (!mux->intr_endp) {
2765 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2766 goto exit;
2767 }
2768
2769 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
12800ea9 2770 if (!mux->shared_intr_urb)
72dc1c09 2771 goto exit;
d9ced80d
JD		 2772 mux->shared_intr_buf =
2773 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2774 GFP_KERNEL);
38673c82 2775 if (!mux->shared_intr_buf)
72dc1c09 2776 goto exit;
72dc1c09
GKH		 2777
2778 mutex_init(&mux->shared_int_lock);
2779
2780 return mux;
2781
2782exit:
2783 kfree(mux->shared_intr_buf);
2784 usb_free_urb(mux->shared_intr_urb);
2785 kfree(mux);
2786 return NULL;
2787}
2788
2789/* Gets the port spec for a certain interface */
2790static int hso_get_config_data(struct usb_interface *interface)
2791{
2792 struct usb_device *usbdev = interface_to_usbdev(interface);
e75dc677 2793 u8 *config_data = kmalloc(17, GFP_KERNEL);
64bea46e 2794 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
72dc1c09
GKH		 2795 s32 result;
2796
e75dc677
DG		 2797 if (!config_data)
2798 return -ENOMEM;
72dc1c09
GKH		 2799 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2800 0x86, 0xC0, 0, 0, config_data, 17,
2801 USB_CTRL_SET_TIMEOUT) != 0x11) {
e75dc677 2802 kfree(config_data);
72dc1c09
GKH		 2803 return -EIO;
2804 }
2805
5146f95d
HP		 2806 /* check if we have a valid interface */
2807 if (if_num > 16) {
2808 kfree(config_data);
2809 return -EINVAL;
2810 }
2811
72dc1c09
GKH		 2812 switch (config_data[if_num]) {
2813 case 0x0:
2814 result = 0;
2815 break;
2816 case 0x1:
2817 result = HSO_PORT_DIAG;
2818 break;
2819 case 0x2:
2820 result = HSO_PORT_GPS;
2821 break;
2822 case 0x3:
2823 result = HSO_PORT_GPS_CONTROL;
2824 break;
2825 case 0x4:
2826 result = HSO_PORT_APP;
2827 break;
2828 case 0x5:
2829 result = HSO_PORT_APP2;
2830 break;
2831 case 0x6:
2832 result = HSO_PORT_CONTROL;
2833 break;
2834 case 0x7:
2835 result = HSO_PORT_NETWORK;
2836 break;
2837 case 0x8:
2838 result = HSO_PORT_MODEM;
2839 break;
2840 case 0x9:
2841 result = HSO_PORT_MSD;
2842 break;
2843 case 0xa:
2844 result = HSO_PORT_PCSC;
2845 break;
2846 case 0xb:
2847 result = HSO_PORT_VOICE;
2848 break;
2849 default:
2850 result = 0;
2851 }
2852
2853 if (result)
2854 result |= HSO_INTF_BULK;
2855
2856 if (config_data[16] & 0x1)
2857 result |= HSO_INFO_CRC_BUG;
2858
e75dc677 2859 kfree(config_data);
72dc1c09
GKH		 2860 return result;
2861}
2862
2863/* called once for each interface upon device insertion */
2864static int hso_probe(struct usb_interface *interface,
2865 const struct usb_device_id *id)
2866{
2867 int mux, i, if_num, port_spec;
2868 unsigned char port_mask;
2869 struct hso_device *hso_dev = NULL;
2870 struct hso_shared_int *shared_int;
2871 struct hso_device *tmp_dev = NULL;
2872
35e57e1b
DG		 2873 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2874 dev_err(&interface->dev, "Not our interface\n");
2875 return -ENODEV;
2876 }
2877
64bea46e 2878 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
72dc1c09
GKH		 2879
2880 /* Get the interface/port specification from either driver_info or from
2881 * the device itself */
5146f95d
HP		 2882 if (id->driver_info) {
2883 /* if_num is controlled by the device, driver_info is a 0 terminated
2884 * array. Make sure, the access is in bounds! */
2885 for (i = 0; i <= if_num; ++i)
2886 if (((u32 *)(id->driver_info))[i] == 0)
2887 goto exit;
72dc1c09 2888 port_spec = ((u32 *)(id->driver_info))[if_num];
5146f95d 2889 } else {
72dc1c09 2890 port_spec = hso_get_config_data(interface);
5146f95d
HP		 2891 if (port_spec < 0)
2892 goto exit;
2893 }
72dc1c09 2894
72dc1c09
GKH		 2895 /* Check if we need to switch to alt interfaces prior to port
2896 * configuration */
2897 if (interface->num_altsetting > 1)
2898 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2899 interface->needs_remote_wakeup = 1;
2900
2901 /* Allocate new hso device(s) */
2902 switch (port_spec & HSO_INTF_MASK) {
2903 case HSO_INTF_MUX:
2904 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2905 /* Create the network device */
2906 if (!disable_net) {
0de8ca59
JD		 2907 hso_dev = hso_create_net_device(interface,
2908 port_spec);
72dc1c09
GKH		 2909 if (!hso_dev)
2910 goto exit;
2911 tmp_dev = hso_dev;
2912 }
2913 }
2914
2915 if (hso_get_mux_ports(interface, &port_mask))
2916 /* TODO: de-allocate everything */
2917 goto exit;
2918
2919 shared_int = hso_create_shared_int(interface);
2920 if (!shared_int)
2921 goto exit;
2922
2923 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2924 if (port_mask & i) {
2925 hso_dev = hso_create_mux_serial_device(
2926 interface, i, shared_int);
2927 if (!hso_dev)
2928 goto exit;
2929 }
2930 }
2931
2932 if (tmp_dev)
2933 hso_dev = tmp_dev;
2934 break;
2935
2936 case HSO_INTF_BULK:
2937 /* It's a regular bulk interface */
8e65c0ec
FA		 2938 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2939 if (!disable_net)
2940 hso_dev =
2941 hso_create_net_device(interface, port_spec);
2942 } else {
72dc1c09
GKH		 2943 hso_dev =
2944 hso_create_bulk_serial_device(interface, port_spec);
8e65c0ec 2945 }
72dc1c09
GKH		 2946 if (!hso_dev)
2947 goto exit;
2948 break;
2949 default:
2950 goto exit;
2951 }
2952
72dc1c09
GKH		 2953 /* save our data pointer in this device */
2954 usb_set_intfdata(interface, hso_dev);
2955
2956 /* done */
2957 return 0;
2958exit:
2959 hso_free_interface(interface);
2960 return -ENODEV;
2961}
2962
2963/* device removed, cleaning up */
2964static void hso_disconnect(struct usb_interface *interface)
2965{
2966 hso_free_interface(interface);
2967
2968 /* remove reference of our private data */
2969 usb_set_intfdata(interface, NULL);
72dc1c09
GKH		 2970}
2971
2972static void async_get_intf(struct work_struct *data)
2973{
2974 struct hso_device *hso_dev =
2975 container_of(data, struct hso_device, async_get_intf);
2976 usb_autopm_get_interface(hso_dev->interface);
2977}
2978
2979static void async_put_intf(struct work_struct *data)
2980{
2981 struct hso_device *hso_dev =
2982 container_of(data, struct hso_device, async_put_intf);
2983 usb_autopm_put_interface(hso_dev->interface);
2984}
2985
2986static int hso_get_activity(struct hso_device *hso_dev)
2987{
2988 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2989 if (!hso_dev->is_active) {
2990 hso_dev->is_active = 1;
2991 schedule_work(&hso_dev->async_get_intf);
2992 }
2993 }
2994
2995 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2996 return -EAGAIN;
2997
2998 usb_mark_last_busy(hso_dev->usb);
2999
3000 return 0;
3001}
3002
3003static int hso_put_activity(struct hso_device *hso_dev)
3004{
3005 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3006 if (hso_dev->is_active) {
3007 hso_dev->is_active = 0;
3008 schedule_work(&hso_dev->async_put_intf);
3009 return -EAGAIN;
3010 }
3011 }
3012 hso_dev->is_active = 0;
3013 return 0;
3014}
3015
3016/* called by kernel when we need to suspend device */
3017static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3018{
3019 int i, result;
3020
3021 /* Stop all serial ports */
3022 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3023 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3024 result = hso_stop_serial_device(serial_table[i]);
3025 if (result)
3026 goto out;
3027 }
3028 }
3029
3030 /* Stop all network ports */
3031 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3032 if (network_table[i] &&
3033 (network_table[i]->interface == iface)) {
3034 result = hso_stop_net_device(network_table[i]);
3035 if (result)
3036 goto out;
3037 }
3038 }
3039
3040out:
3041 return 0;
3042}
3043
3044/* called by kernel when we need to resume device */
3045static int hso_resume(struct usb_interface *iface)
3046{
3047 int i, result = 0;
3048 struct hso_net *hso_net;
3049
3050 /* Start all serial ports */
3051 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3052 if (serial_table[i] && (serial_table[i]->interface == iface)) {
5ce76e77 3053 if (dev2ser(serial_table[i])->port.count) {
72dc1c09
GKH		 3054 result =
3055 hso_start_serial_device(serial_table[i], GFP_NOIO);
3056 hso_kick_transmit(dev2ser(serial_table[i]));
3057 if (result)
3058 goto out;
3059 }
3060 }
3061 }
3062
3063 /* Start all network ports */
3064 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3065 if (network_table[i] &&
3066 (network_table[i]->interface == iface)) {
3067 hso_net = dev2net(network_table[i]);
89930b7b
DJB		 3068 if (hso_net->flags & IFF_UP) {
3069 /* First transmit any lingering data,
3070 then restart the device. */
3071 if (hso_net->skb_tx_buf) {
3072 dev_dbg(&iface->dev,
3073 "Transmitting"
3074 " lingering data\n");
3075 hso_net_start_xmit(hso_net->skb_tx_buf,
3076 hso_net->net);
3077 hso_net->skb_tx_buf = NULL;
3078 }
3079 result = hso_start_net_device(network_table[i]);
3080 if (result)
3081 goto out;
72dc1c09 3082 }
72dc1c09
GKH		 3083 }
3084 }
3085
3086out:
3087 return result;
3088}
3089
3090static void hso_serial_ref_free(struct kref *ref)
3091{
3092 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3093
3094 hso_free_serial_device(hso_dev);
3095}
3096
3097static void hso_free_interface(struct usb_interface *interface)
3098{
f6516b69 3099 struct hso_serial *serial;
72dc1c09
GKH		 3100 int i;
3101
3102 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 3103 if (serial_table[i] &&
3104 (serial_table[i]->interface == interface)) {
f6516b69
OS		 3105 serial = dev2ser(serial_table[i]);
3106 tty_port_tty_hangup(&serial->port, false);
3107 mutex_lock(&serial->parent->mutex);
3108 serial->parent->usb_gone = 1;
3109 mutex_unlock(&serial->parent->mutex);
cc491970
OS		 3110 cancel_work_sync(&serial_table[i]->async_put_intf);
3111 cancel_work_sync(&serial_table[i]->async_get_intf);
69b377b3 3112 hso_serial_tty_unregister(serial);
ab153d84 3113 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
301d3b7e 3114 set_serial_by_index(i, NULL);
72dc1c09
GKH		 3115 }
3116 }
3117
3118 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
8e95a202
JP		 3119 if (network_table[i] &&
3120 (network_table[i]->interface == interface)) {
72dc1c09
GKH		 3121 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3122 /* hso_stop_net_device doesn't stop the net queue since
3123 * traffic needs to start it again when suspended */
3124 netif_stop_queue(dev2net(network_table[i])->net);
3125 hso_stop_net_device(network_table[i]);
3126 cancel_work_sync(&network_table[i]->async_put_intf);
3127 cancel_work_sync(&network_table[i]->async_get_intf);
19d337df 3128 if (rfk) {
72dc1c09 3129 rfkill_unregister(rfk);
19d337df
JB		 3130 rfkill_destroy(rfk);
3131 }
72dc1c09
GKH		 3132 hso_free_net_device(network_table[i]);
3133 }
3134 }
3135}
3136
3137/* Helper functions */
3138
3139/* Get the endpoint ! */
3140static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3141 int type, int dir)
3142{
3143 int i;
3144 struct usb_host_interface *iface = intf->cur_altsetting;
3145 struct usb_endpoint_descriptor *endp;
3146
3147 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3148 endp = &iface->endpoint[i].desc;
3149 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
f201a8a4 3150 (usb_endpoint_type(endp) == type))
72dc1c09
GKH		 3151 return endp;
3152 }
3153
3154 return NULL;
3155}
3156
3157/* Get the byte that describes which ports are enabled */
3158static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3159{
3160 int i;
3161 struct usb_host_interface *iface = intf->cur_altsetting;
3162
3163 if (iface->extralen == 3) {
3164 *ports = iface->extra[2];
3165 return 0;
3166 }
3167
3168 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3169 if (iface->endpoint[i].extralen == 3) {
3170 *ports = iface->endpoint[i].extra[2];
3171 return 0;
3172 }
3173 }
3174
3175 return -1;
3176}
3177
3178/* interrupt urb needs to be submitted, used for serial read of muxed port */
3179static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3180 struct usb_device *usb, gfp_t gfp)
3181{
3182 int result;
3183
3184 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3185 usb_rcvintpipe(usb,
3186 shared_int->intr_endp->bEndpointAddress & 0x7F),
3187 shared_int->shared_intr_buf,
d9ced80d 3188 1,
72dc1c09
GKH		 3189 intr_callback, shared_int,
3190 shared_int->intr_endp->bInterval);
3191
3192 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3193 if (result)
8a5c9c49 3194 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
72dc1c09
GKH		 3195 result);
3196
3197 return result;
3198}
3199
3200/* operations setup of the serial interface */
6c59f569 3201static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 3202 .open = hso_serial_open,
3203 .close = hso_serial_close,
3204 .write = hso_serial_write,
3205 .write_room = hso_serial_write_room,
29bd3bc1 3206 .cleanup = hso_serial_cleanup,
542f5482 3207 .ioctl = hso_serial_ioctl,
72dc1c09
GKH		 3208 .set_termios = hso_serial_set_termios,
3209 .chars_in_buffer = hso_serial_chars_in_buffer,
3210 .tiocmget = hso_serial_tiocmget,
3211 .tiocmset = hso_serial_tiocmset,
0bca1b91 3212 .get_icount = hso_get_count,
8ef5ba63 3213 .unthrottle = hso_unthrottle
72dc1c09
GKH		 3214};
3215
3216static struct usb_driver hso_driver = {
3217 .name = driver_name,
3218 .probe = hso_probe,
3219 .disconnect = hso_disconnect,
3220 .id_table = hso_ids,
3221 .suspend = hso_suspend,
3222 .resume = hso_resume,
9c8f92ae 3223 .reset_resume = hso_resume,
72dc1c09 3224 .supports_autosuspend = 1,
e1f12eb6 3225 .disable_hub_initiated_lpm = 1,
72dc1c09
GKH		 3226};
3227
3228static int __init hso_init(void)
3229{
3230 int i;
3231 int result;
3232
3233 /* put it in the log */
3981cce6 3234 pr_info("%s\n", version);
72dc1c09
GKH		 3235
3236 /* Initialise the serial table semaphore and table */
3237 spin_lock_init(&serial_table_lock);
3238 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3239 serial_table[i] = NULL;
3240
3241 /* allocate our driver using the proper amount of supported minors */
3242 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3243 if (!tty_drv)
3244 return -ENOMEM;
3245
3246 /* fill in all needed values */
72dc1c09
GKH		 3247 tty_drv->driver_name = driver_name;
3248 tty_drv->name = tty_filename;
3249
3250 /* if major number is provided as parameter, use that one */
3251 if (tty_major)
3252 tty_drv->major = tty_major;
3253
3254 tty_drv->minor_start = 0;
72dc1c09
GKH		 3255 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3256 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3257 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3258 tty_drv->init_termios = tty_std_termios;
ac9720c3 3259 hso_init_termios(&tty_drv->init_termios);
72dc1c09
GKH		 3260 tty_set_operations(tty_drv, &hso_serial_ops);
3261
3262 /* register the tty driver */
3263 result = tty_register_driver(tty_drv);
3264 if (result) {
3981cce6
JP		 3265 pr_err("%s - tty_register_driver failed(%d)\n",
3266 __func__, result);
d230788f 3267 goto err_free_tty;
72dc1c09
GKH		 3268 }
3269
3270 /* register this module as an usb driver */
3271 result = usb_register(&hso_driver);
3272 if (result) {
3981cce6 3273 pr_err("Could not register hso driver - error: %d\n", result);
d230788f 3274 goto err_unreg_tty;
72dc1c09
GKH		 3275 }
3276
3277 /* done */
3278 return 0;
d230788f
JS		 3279err_unreg_tty:
3280 tty_unregister_driver(tty_drv);
3281err_free_tty:
3282 put_tty_driver(tty_drv);
3283 return result;
72dc1c09
GKH		 3284}
3285
3286static void __exit hso_exit(void)
3287{
3981cce6 3288 pr_info("unloaded\n");
72dc1c09
GKH		 3289
3290 tty_unregister_driver(tty_drv);
3291 /* deregister the usb driver */
3292 usb_deregister(&hso_driver);
a23f6ce6 3293 put_tty_driver(tty_drv);
72dc1c09
GKH		 3294}
3295
3296/* Module definitions */
3297module_init(hso_init);
3298module_exit(hso_exit);
3299
3300MODULE_AUTHOR(MOD_AUTHOR);
3301MODULE_DESCRIPTION(MOD_DESCRIPTION);
461ee7f3 3302MODULE_LICENSE("GPL");
72dc1c09
GKH		 3303
3304/* change the debug level (eg: insmod hso.ko debug=0x04) */
95a69117 3305MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
d61e4038 3306module_param(debug, int, 0644);
72dc1c09
GKH		 3307
3308/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3309MODULE_PARM_DESC(tty_major, "Set the major tty number");
d61e4038 3310module_param(tty_major, int, 0644);
72dc1c09
GKH		 3311
3312/* disable network interface (eg: insmod hso.ko disable_net=1) */
3313MODULE_PARM_DESC(disable_net, "Disable the network interface");
d61e4038 3314module_param(disable_net, int, 0644);
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